CN102581376A - Reciprocating cutting tool - Google Patents

Abstract

The invention provides a reciprocating cutting tool for cutting workpieces, including: a handle; a shell, pivotally connected with the handle, and being capable of operatively rotating relative to the handle to provide a first working state and a second working state to the reciprocating cutting tool; a motor, received inside the shell; and a saw blade, driven by the motor to do reciprocating motion. The area of the reciprocating cutting tool resisting against the surface of a workpiece in the second working state is greater than the area against the surface of the workpiece in the first working state. In the invention, when the reciprocating cutting tool is in the second working state, cutting of the workpiece is quite stable and reliable, the reciprocating cutting tool is suitable for fine cutting tasks; when the reciprocating cutting tool is in the first working state, as the area against the surface of the workpiece is relatively small, the reciprocating cutting tool is suitable for rough processing, such as cutting objects quickly. With such design, the overall performance of the reciprocating cutting tool is improved, and great convenience is brought to users.

Description

Reciprocal cutting tool

Technical field

The present invention relates to a kind of reciprocal cutting tool, especially a kind of reciprocal cutting tool of hand-held.

Background technology

Reciprocating saw and sweep-saw all are a kind of in the reciprocal cutting tool; Their operation principle is also substantially the same; All be by the motor-driven reduction gearing, drive reciprocating lever and produce and move back and forth, make to be connected the free-ended saw blade of reciprocating lever and can to carry out reciprocal cutting operation workpiece.Difference only is that sweep-saw is resisted against surface of the work cutting through a base plate, and the gravity of sweep-saw is born by workpiece, and reciprocating saw then is to be cut by user's handling and the gravity of bearing reciprocating saw.

Because the difference of working method, the sweep-saw volume is little and be used for comparatively meticulous operation more, and it often has a very big gripper shoe, thereby reliable and stable support is provided for cutting work; And the reciprocating saw volume is bigger, and is used for rough machined operation more, and like simple cut-out workpiece, it is very little that its gripper shoe often designs.

In the course of the work, the user usually need replace replacing between these two kinds of instruments, and is loaded down with trivial details and influence operating efficiency, brought very big inconvenience to the user.Some production firms have released the multifunctional saw that can between reciprocating saw and sweep-saw, change; Yet, when it is used as sweep-saw, fail to obtain stable support because it is used for against the gripper shoe of surface of the work lessly; Make cutting accuracy lower, can't satisfy user's demand.

Summary of the invention

The object of the present invention is to provide a kind of reciprocal cutting tool, and have comparatively comfortable stable operation sense with two duties.

For realizing above-mentioned purpose, the invention provides a kind of reciprocal cutting tool, be used for cut workpiece, comprising: handle; With the housing that said handle pivots and is connected, it is exercisable with respect to said handle rotation, makes said reciprocal cutting tool have first duty and second duty; Be contained in the motor in the said housing; The saw blade that moves reciprocatingly by the driving of said motor; Said reciprocal cutting tool is resisted against surface of the work in second duty area is resisted against the area of surface of the work greater than it in first duty.

Preferably; Said housing has first abutment face; Said handle has second abutment face, when said reciprocal cutting tool is in said first duty, only by said first abutment face against said workpiece; When said reciprocal cutting tool was in said second duty, said first abutment face and said second abutment face were jointly against said workpiece.

Preferably, when said reciprocal cutting tool was in said second duty, said first abutment face and the said second abutment face coplane were against said workpiece.

Preferably, when said reciprocal cutting tool was in said first duty, said first abutment face and said second abutment face intersected not coplane.

Preferably, when said reciprocal cutting tool was in said first duty, said first abutment face was vertical with said second abutment face.

Preferably, said housing has first bracing frame, and said first abutment face is positioned on said first bracing frame, and said handle comprises grip part and second bracing frame with said second abutment face.

Preferably, said second bracing frame have can against workpiece against plate, and saidly be provided with fan component against plate, said fan component is used for when said reciprocal cutting tool is in second duty, carrying out drifting dust.

Preferably, said fan component is driven by independent fan electromotor.

Preferably, said second bracing frame have can against workpiece against plate, and said power brick of accommodating promising said fan component and the power supply of said motor on the plate.

Preferably, said power brick is between said second abutment face and said grip part.

Preferably, said have the resettlement section of extending along longitudinally and partly accommodate said power brick against plate, and the bearing of trend of said resettlement section is vertical with said electrical axis.

Preferably, the end of said power brick from said resettlement section back to said saw blade inserts said resettlement section.

Preferably, said second bracing frame is provided with backing plate towards the surface of workpiece, and said second abutment face is the surface of said backing plate towards workpiece.

Preferably, the material of said backing plate is plastics or metal.

Preferably, when said reciprocal cutting tool when said first duty is converted to said second duty, its center of gravity can along said electrical axis radially near said handle.

Preferably, when said reciprocal cutting tool is in said first duty, said first abutment face and the parallel not coplane of said second abutment face.

Reciprocal cutting tool among the present invention has first duty and second duty; And the area that is resisted against surface of the work through second duty is resisted against the area of surface of the work greater than it in first duty; Cut workpiece can be highly stable reliable when second duty to make it; Be applicable to and carry out meticulous cutting work, and said reciprocal cutting tool when being in first duty because to be resisted against the area of surface of the work less relatively, be applicable to roughing such as fast shut-off object.The overall performance that has improved reciprocal cutting tool so is set, and has promoted operational comfort, bring great convenience to the user.

Description of drawings

Fig. 1 is the side view of the reciprocal cutting tool that provides of first embodiment, and at this moment, said reciprocal cutting tool is in first duty;

Fig. 2 is the side view of the reciprocal cutting tool that provides of first embodiment, and at this moment, said reciprocal cutting tool is in second duty;

Fig. 3 is the perspective exploded view of reciprocal cutting tool among Fig. 1;

Fig. 4 be among Fig. 2 reciprocal cutting tool along the part cross-sectional schematic of straight line I-I;

Fig. 5 is the cross-sectional schematic that the retaining mechanism of reciprocal cutting tool among Fig. 1 is in the lock state;

Fig. 6 is in the cross-sectional schematic of release conditions for the retaining mechanism among Fig. 5;

Fig. 7 is the side view of the connecting axle of retaining mechanism among Fig. 5;

Fig. 8 is the side view of the reciprocal cutting tool that provides of second embodiment, and at this moment, said reciprocal cutting tool is in first duty;

Fig. 9 is the schematic perspective view of the reciprocal cutting tool that provides of second embodiment, and at this moment, said reciprocal cutting tool is in second duty;

Figure 10 is the schematic perspective view of the reciprocal cutting tool among Fig. 9, and wherein, the fan resettlement section of reciprocal cutting tool is cut open and exposed inner fan component;

Figure 11 is the schematic perspective view of reciprocal cutting tool among Fig. 9, and at this moment, said reciprocal cutting tool is in inversion state;

Figure 12 is the side view of reciprocal cutting tool among Fig. 9, and wherein, the air outlet of the fan component of reciprocal cutting tool partly is broken away.

Related elements reference numeral in the diagram is following:

10,reciprocal cutting tool 11,handle 12, power brick

13,housing 14,retaining mechanism 15, first bracing frame

16,limited bolt 17,saw blade 18, button

19,main body 20,installation portion 21, first gripper shoe

23,first abutment face 25,motor 27, transmission component

29, reciprocatinglever 31, sawblade chuck 33, driven wheel

35,reduction gearing 37,gear shaft 39, eccentric shaft

41,electric machine casing 43a, the first transmission housing 43b, the second transmission housing

45,grip part 47,switch 49, second bracing frame

51,first support arm 53,second support arm 55, against plate

56,second abutment face 57, locatingpart 58, smooth surface

59,counterpart 60, operatingparts resettlement section 61, locking member

63,operating parts 64, rotatingshaft 65, lid

67, connectingaxle 69, connectingaxle limiting section 71, eccentric part

73, connectingportion 75,hole 100, reciprocal cutting tool

111,handle 112,power brick 113, housing

115,first bracing frame 117, saw blade 129, reciprocating lever

145, grip part 146, grip space 147, switch

155, againstplate 156, second abutment face 159, mating part

163, operatingparts 165,lid 168, accepting groove

170, operating side 176, resettlement section 177, power brick resettlement section

179,fan resettlement section 181, fan component 183, fresh air inlet

184,exhaust vent 185,fan hub 187, turbine

189, backing plate

The specific embodiment

Below in conjunction with accompanying drawing and specific embodiment the present invention is done further detailed description.

See also Fig. 1, first embodiment of the invention provides a kind of reciprocal cutting tool 10.Reciprocal cutting tool 10 compriseshandle 11; Be installed in thepower brick 12 on thehandle 11; With thehousing 13 that handle 11 pivots mutually and connects, be arranged on theretaining mechanism 14 that is used for lock handle 11 andhousing 13 relative positions on thehousing 13, and thesaw blade 17 that stretches out in thehousing 13.

Please consult Fig. 1 and Fig. 3 in the lump,housing 13 has first bracing frame, 15, the first bracingframes 15 and comprisesmain body 19 andfirst gripper shoe 21 that is connectedmain body 19 1 ends.Main body 19 is middle short side barrel shape, and saidfirst gripper shoe 21 hasfirst abutment face 23, centre bore is set onfirst gripper shoe 21 supplies sawblade 17 to stretch out first abutment face 23.Whenreciprocal cutting tool 10 cut workpiece,first abutment face 23 can be resisted against on the surface of workpiece, thereby for the user provides support, makes cutting process more stable.Main body 19 is provided withinstallation portion 20 back to an end offirst gripper shoe 21, andinstallation portion 20 is buckle structure, and first bracingframe 15 can be mounted on thehousing 13 throughinstallation portion 20.

Containmotor 25 in thehousing 13, thetransmission component 27 that is connected withmotor 25, and the reciprocatinglever 29 that drives and can partly stretch outhousing 13 by transmission component 27.Away from the end oftransmission component 27 sawblade 17 is installed at reciprocatinglever 29.

Please consult Fig. 3 and Fig. 4 in the lump,motor 25 has motor output shaft and is socketed in the drivenwheel 33 on the motor output shaft, whenmotor 25 energising work, drives drivenwheel 33 around electrical axis X rotation through motor output shaft.

Transmission component 27 can connect with drivenwheel 33 and reciprocatinglever 29 respectively, realizes the rotation of drivenwheel 33 is converted into the reciprocating motion of reciprocating lever 29.In this embodiment,transmission component 27 comprises reduction gearing 35,gear shaft 37 and eccentric shaft 39.Whenmotor 25 drove reduction gearing 35, it can be around the Gear axis Y rotation of gear shaft 37.Eccentric shaft 39 is arranged on the reduction gearing 35, and it is used for connecting with reciprocatinglever 29, and the eccentric axis Z ofeccentric shaft 39 and Gear axis Y parallel, and when reduction gearing 35 was rotated, eccentric axis Z can rotate around Gear axis Y.

Certainly; Those skilled in the art can also adopt the other technologies scheme to realize the function oftransmission component 27; Cooperate with reciprocatinglever 29 etc. such as setting-up eccentricity axle on drivenwheel 33; No longer describe in detail at this, but as long as its function and effect and the present invention is same or similar all should be covered by in the protection domain of the present invention.

Reciprocatinglever 29 extends along longitudinally.The bearing of trend of reciprocatinglever 29 is vertical with electrical axis X, when reciprocatinglever 29 drives sawblade 17 and cuts work under the driving oftransmission component 27, can drive sawblade 17 and move back and forth along said bearing of trend.So,motor 25 is arranged at a side of reciprocatinglever 29, far away apart fromhandle 11, thus effectively having reduced in the course of work, the vibrations ofmotor 25 have improved operational comfort to the influence of user's hand.In this embodiment, reciprocatinglever 29 1 ends connect through frid (not shown) and theeccentric shaft 39 with bar hole, thereby realize the rotation of reduction gearing 35 is changed into the reciprocating motion of reciprocating lever 29.The other end of the said relatively frid of reciprocatinglever 29 is asaw blade chuck 31, and the user can clamp or release sawblade 17 through operation saw blade chuck 31.After reciprocatinglever 29 was mounted in thehousing 13, sawblade chuck 31 can stretch out outside thehousing 13, and was contained in first bracingframe 15.

Housing 13 comprises theelectric machine casing 41 that extends and accommodatemotor 25 along electrical axis X, and extends and accommodate the transmission housing oftransmission component 27 andpart reciprocating lever 29 along the bearing of trend of reciprocating lever.Said transmission housing is divided into thefirst transmission housing 43a that is made into integration withelectric machine casing 41 and matches with thefirst transmission housing 43a and forms thesecond transmission housing 43b of receiving space.Afterreciprocal cutting tool 10 was accomplished assembling,transmission component 27 just was contained in the said receiving space with part reciprocating lever 29.In this embodiment, because electrical axis X and the perpendicular setting of reciprocating lever bearing of trend, make manufacturing process simpler thefirst transmission housing 43b andelectric machine casing 41 one-body molded processing this moment, is convenient to assembling.Because fixed-site between transmission housing and theelectric machine casing 41; Therefore whenhousing 13 during with respect to handle 11 rotations, it is vertical that electrical axis X and the bearing of trend of reciprocating lever remain, and so makes inner drive mechanism simple; Reduced structure complexity, be convenient to assembling and prolonged service life.

Please consult Fig. 1 and Fig. 3 in thelump.Housing 13 can rotate with respect to handle 11 around electrical axis X, and the user can limit the two position relation throughoperation retaining mechanism 14.

Handle 11 comprisesgrip part 45, is arranged on theswitch 47 on thegrip part 45, and second bracingframe 49 that is connected withgrip part 45.

Grip part 45 is cylindric and along the extension of longitudinally, the one of which end is used for through the bucklemode power brick 12 being installed, and its other end is connected withhousing 13.

Switch 47 is arranged on the position ofgrip part 45 nearhousing 13, and is arranged atgrip part 45 back to the facial side of user, and when the user heldgrip part 45, its forefinger just can touch the triggering key ofswitch 47, so was provided with and had brought facility to the user.The control circuit board (not shown) also is installed ingrip part 45, testing circuit is installed on control circuit board, be used for detecting the temperature and the voltage of the battery ofpower brick 12; And when temperature is higher than 75 degree; Or voltage is lower than 7.8V, when perhaps electric current is greater than 20A, can break off by gauge tap47.Power brick 12 is effectively protected, has prolonged service life.

Certainly; Temperature, voltage or electric current in the control circuit board detection power brick is not limited to the numerical value of foregoing description; Those skilled in the art's those numerical value that are subject to variation according to actual needs, but as long as the function of its realization is identical with the present invention or close, all should be covered by in the protection domain of the present invention.

Second bracingframe 49 comprisesfirst support arm 51,second support arm 53 and against plate 55.A free end offirst support arm 51 is connected with the end thatpower brick 12 is installed ingrip part 45, and a free end ofsecond support arm 53 is connected with the other end of grip part 45.Two free ends againstplate 55 are connected with the free end ofsecond support arm 53 away fromgrip part 45 withfirst support arm 51 respectively; And againstplate 55 have one back to thegrip part 45second abutment face 56; Be used to enlarge the area thatreciprocal cutting tool 10 is resisted against surface of the work, make cutting process more reliable and more stable.

Be appreciated that; In this embodiment;Grip part 45,first support arm 51,second support arm 53 and constituted a quadrangle againstplate 55; Whereingrip part 45 be oppositely arranged againstplate 55, just can not influence the size and the structure ofgrip part 45 again through be used to increase rest surface in thatsecond abutment face 56 is set onplate 55 thismoment.Grip part 45 with can also form " D " shape againstplate 55 and said support arm.Certainly, those skilled in the art also possibly further improve to the technical scheme among the present invention, but as long as the function of its realization and effect and the present invention are same or similar, all should be covered by in the protection domain of the present invention.

Please consult Fig. 1 and Fig. 2 in the lump; Reciprocal cutting tool 10 has first duty and second duty; Wherein when reciprocal cutting tool 10 is in second duty, when the area that reciprocal cutting tool 10 is resisted against surface of the work was in first duty greater than reciprocal cutting tool 10, reciprocal cutting tool 10 was resisted against the area of surface of the work; So be provided with and make the user tackle the use needs more flexibly; When needs fast shut-off workpiece, just reciprocal cutting tool 10 is adjusted to first duty, when needs cut comparatively accurately; Can reciprocal cutting tool 10 be adjusted to second duty, make the process of cut workpiece more reliable and more stable.And; When reciprocal cutting tool 10 when first duty is converted to second duty, its center of gravity can along electrical axis X radially near handle 11, so when being in first duty; When the user operates reciprocal cutting tool 10 cut workpiece; Meeting provides cutting required pressure by the gravity of the center of gravity of reciprocal and instrument 10 to saw blade 17, thereby has saved the user from body forces, has reduced and has used fatigue; When reciprocal cutting tool 10 was in second duty, its center of gravity was to the side shifting near handle 11, thereby made the user more stable to the control of reciprocal cutting tool 10, helped to improve cutting accuracy.

Whenreciprocal cutting tool 10 is in first duty; Only byfirst abutment face 23 against workpiece; Promptlyfirst abutment face 23 andsecond abutment face 56 intersect not coplane; This moment, reciprocal cutting tool more than 10 was used for fast cutting workpiece, and is preferred, the workpiece of cutting such as wooden stick, tubing or need be along the sheet material of perpendicular cut-out etc.Reciprocal cutting tool 10 is in second duty when the user operateshousing 13 with respect to handle 11 rotations; Evenfirst abutment face 23 turns to the position thatfirst abutment face 23 andsecond abutment face 56 are resisted against surface of the work jointly with respect to electrical axis X; This moment,reciprocal cutting tool 10 was in second duty; Preferably, be resisted against simultaneously on the surface of a level of workpiece throughfirst abutment face 23 andsecond abutment face 56 this moment.Owing to increased rest surface, make cutting work obtain the stable more support that can arrive, this moment,reciprocal cutting tool 10 went for having very high cutting accuracy along the horizontal plane machining sheet.

First abutment face 23 is all parallel with electrical axis X withsecond abutment face 56; Andfirst abutment face 23 can rotate around electrical axis X with respect tosecond abutment face 56; Realize that soreciprocal cutting tool 10 has said two duties; Moreover, equal by the distance of electrical axis X to thefirst abutment face 23 andsecond abutment face 56, realize thatfirst abutment face 23 andsecond abutment face 56 can be resisted against surface of the work by coplane.

The housing 13 of reciprocal cutting tool 10 can be limited in certain angular range with respect to handle 11 rotations; So; Can prevent the rotation of housing 13, cause turning cylinder and retaining mechanism 14 to damage easily, and can know the angle setting between the housing 13 and handle 11 when defining said two duties with respect to handle 11 unrestricted angles; Make user's between switching fast, brought facility to the user.In this embodiment; Reciprocal cutting tool 10 is changed between said first duty and said second duty when regulating; Variable angle scope between first abutment face 23 and second abutment face 56 is that 90 degree are to 0 degree; Promptly when the angle between first abutment face 23 and second abutment face 56 be 90 when spending; Reciprocal cutting tool 10 is in said first duty, and when the angle between second abutment face 23 and second abutment face 56 is 0 when spending, reciprocal cutting tool 10 is in said second duty.Certainly; Angle when reciprocal cutting tool 10 is in first duty between second abutment face 23 and second abutment face 56 is not limited to 90 degree; It is merely comparatively preferred angle value; The angle value of this angle can also be spent or the like like 85 degree, 80 degree, 75 degree or 70 for other angle; Perhaps the user can be limited in the position that said angle is in non-0 degree through retaining mechanism 14 with the two when housing 13 is rotated with respect to handle 11, and this moment, reciprocal cutting tool 10 also can carry out cutting tool.

Certainly, be installed ongrip part 45 also with through other technical scheme,, promptly get final product against being connected with at least one support arm betweenplate 55 and thegrip part 45 asfirst support arm 51 only being set orsecond support arm 53 etc. only being set against plate 55.The shape ofsecond abutment face 56 also can be arranged to difformity according to different use needs, like square, triangle, circle or other polygons etc.Because of not being directed against the technical scheme that will be installed ongrip part 45 at this as space is limited againstplate 55; And the shape ofsecond abutment face 56 is enumerated one by one; But, then all should be covered by in the protection domain of the present invention as long as the function of its realization is same or similar with effect and the present invention of reaching.

Whenreciprocal cutting tool 10 after said first duty is converted to said second duty; This moment, the sawtooth ofsaw blade 17 can be towards second bracingframe 49; Need this moment user'sgripping handle 11 back pullingreciprocal cutting tools 10 to carry out cutting work; In order to make thereciprocal cutting tool 10 can be more comfortable when the work of said second duty, the user reinstalls after can unloading sawblade 17, makes sawtooth back to second bracingframe 49; The user just can gripping handle 11 promotesreciprocal cutting tool 10 forward and carried out cutting work this moment, had improved the comfort level of work.

For the operation that makesreciprocal cutting tool 10 more comfortable; The angular range of the angle between the bearing of trend of thegrip part 45 ofhandle 11 andsecond abutment face 56 is that 10 degree are to 30 degree; Preferably, the angle value of this angle is 15 degree, and is the most comfortable during user'sgripping handle 11 work at this moment.

Certainly; Those skilled in the art can also realize that reciprocal cutting tool 10 possesses two kinds of duties through alternate manner; And the area that is resisted against surface of the work when making reciprocal cutting tool 10 be in second duty is resisted against the area of surface of the work when being in first duty greater than it; Such as on first bracing frame 15 through the mode of pivot install one with first gripper shoe 21 identical shaped against plate; Said against plate have back to first surface and second surface, wherein second surface is as second abutment face of reciprocal cutting tool 10.When reciprocal cutting tool 10 is in first duty; Should can be contained in main body 19 inside against plate; And only being resisted against surface of the work by first abutment face 23 of first gripper shoe 21, said second abutment face and the first abutment face 23 not coplane that is parallel to each other is when reciprocal cutting tool 10 is in second duty; Operate and saidly rotate with respect to first gripper shoe 21 against plate; Make said first surface or second surface, be resisted against surface of the work jointly, thereby realized enlarging the area that reciprocal cutting tool 101 is resisted against surface of the work with first abutment face 23 against plate.Certainly; Cause as space is limited; Only described saidly can be installed on first gripper shoe 21 with the mode that pivots against plate here, realized that reciprocal cutting tool 10 has first duty and second duty, those skilled in the art also possibly make other change designs; Can move with respect to first gripper shoe 21 with the mode of translation against plate etc. such as said; Enumerate no longer one by one as space is limited at this, but, all should be covered by in the protection domain of the present invention as long as the function of its realization is same or similar with effect and the present invention of reaching.

See also Fig. 3, retainingmechanism 14 has lockinghousing 13 and the lock-out state ofhandle 11 mutual alignments relation and the release conditions that allowhousing 13 to rotate with respect to handle 11.

Retainingmechanism 14 comprises the locatingpart 57 that is arranged on thesecond transmission housing 43b, be arranged at thecounterpart 59 that can accommodate locatingpart 57 on thehandle 11, can cooperate the lockingmember 61 of realizing locking function, exercisabledrive locking member 61 to realize locking and the operatingparts 63 that discharges with locatingpart 57; And be installed on thelid 65 on thecounterpart 59, realize lockingmember 61 and locatingpart 57 are contained in the receiving space oflid 65 andcounterpart 59 formation.

Please consult Fig. 3 and Fig. 5 in the lump; Locating part 57 is arranged at the second transmission housing 43b on the surface of the first transmission housing 43a; It has at least two limiting sections; Each said limiting section all can cooperate the position relation that limits between housing 13 and the handle 11 with locking member 61, and a vertical position limiting section is arranged in wherein said two limiting sections at least, and locking member 61 can cooperate with the vertical position limiting section; Make the bearing of trend of reciprocating lever 29 vertical, i.e. first abutment face 23 and second abutment face, 56 coplanes with second abutment face 56.In this embodiment; Locating part 57 is the axially extending cylindrical shape along electrical axis X; Said limiting section is the limited impression along electrical axis X extension that is arranged on locating part 57 exterior lateral sides, and said limited impression is used for cooperating with locking member 61 position of qualification handle 11 and housing 13.Preferably; The quantity of said limited impression is a plurality of and adjacent setting; So make the circumferential exterior surface of locating part 57 be covered with limited impression, so can realize cooperating realization that housing 13 is limited in a plurality of positions with limited impression through locking member 61, the user just can be according to actual needs like this; Adjustment housings 13 has satisfied user demand greatly with respect to the angle of handle 11 arbitrarily.

Counterpart 59 is arranged on the end ofhandle 11 away frompower brick 12, and when being assembled intoreciprocal cutting tool 10,counterpart 59 is accommodated locatingpart 57 and lockingmember 61, andhousing 13 can be rotated with respect tocounterpart 59 around electrical axis X.In this embodiment;Counterpart 59 and handle 11 one-body molded processing; It is the cylindrical shape of hollow, and is set in locatingpart 57 outsides, andcounterpart 59 and locatingpart 57 and the coaxial extension of electrical axis X; Makehousing 13 function of use that has increasedreciprocal cutting tool 10 so is set with respect to handle 11 around electrical axisX rotation.Counterpart 59 is provided with operatingparts resettlement section 60; Being used for part accommodates operatingparts 63 and allows operatingparts 63 in the certain angle scope, to rotate; To realize driving lockingmember 61; Having realized so just that locatingpart 57, lockingmember 61 and operatingparts 63 are all or part of is contained in thecounterpart 59, makes structure very compact, has reduced the volume of complete machine.

Please consult Fig. 3, Fig. 5 and Fig. 6 in the lump; Lockingmember 61 is used for cooperating with locatingpart 57; Can realize limiting the position ofhousing 13 with respect to handle 11; It is exercisable to be inrestriction housing 13 locked position in relative rotation with respect to handle 11, and allowshousing 13 with respect to handle off-position in relative rotation, and retainingmechanism 14 is in the lock state and release conditions.When the user need regulate the duty ofreciprocal cutting tool 10; Just operating lockingmember 61 makes it be in the off-position; After duty is regulated completion, just operate lockingmember 61 and make it be in locked position, so setting makes the user regulate the duty ofreciprocal cutting tool 10 very easily; And can be stable after regulate accomplishing be locked in the target duty, it is comfortable that the course of work is stablized more.

In this embodiment, lockingmember 61 lengthwises extend and mid portion possesses certain radian, make its partsurround locating part 57, and promptly locatingpart 57 is positioned at the side near lockingmember 61 centers ofcircle.Locking member 61 1 ends are installed oncounterpart 59 through connectingaxle 67, and the other end is connected with operating parts 63.Lockingmember 61 is a locking face towards the surface of said locatingpart 57; Be the arc inner surface of lockingmember 61, when lockingmember 61 was in locked position, said locking face can closely contact with locatingpart 57 mutually;Corresponding retaining mechanism 14 is in said lock-out state; Because locatingpart 57 surfaces are provided with said limited impression, discontinuity after making said locking face and locatingpart 57 closely contacting mutually, thus further increased the frictional force between the two; Promptly increased the rotary resistance betweenhousing 13 and thehandle 11, thereby made spacing more firm betweenhousing 13 and thehandle 11; When said locking face and the disengaging of said locating part, lockingmember 61 is in the off-position, and this moment, retainingmechanism 14 was in said release conditions.

In order to make lockingmember 61 have ductility preferably; It adopts steel band to process; Preferred its be that 0.60% to 0.95% carbon steel is processed for phosphorus content, so be provided with can make its make spacing firm be not prone to loosening, and the ductility of lockingmember 61 and life-span reach the best.

When making lockingmember 61 be in locked position; It is more firm with cooperating of locatingpart 57; On the said locking face of lockingmember 61, at least one convexity is set, said convexity is used for and the engagement of said limited impression, and quantity that preferably should convexity is two; Spacing comparatively firm stable, and technology is simple.When said convexity with after said limited impression is meshed, said locking face also closely contacts more firm that the position relation that makes between lockingmember 61 and the locatingpart 57 limits with said locating part near the zone of said convexity.

The limiting section that is appreciated that locatingpart 57 does not limit to the mode that adopts limited impression, and it also can be convexity, and corresponding lockingmember 61 can be provided with limited impression and cooperaterealization retaining mechanism 14 to be in said lock-out state with said convexity.Those skilled in the art also possibly make other change design under teachings of the present invention, but as long as the function of its realization and effect and the present invention are same or similar, all should be covered by in the protection domain of the present invention.

More stable for connectingaxle 67 is installed, an end of connectingaxle 67 is installed on thecounterpart 59, and the other end is installed on thelid 65.

Please consult Fig. 3, Fig. 5 and Fig. 7 in the lump; In order to prevent that locking member 61 is through occurring after long-time the use when lax; Cause spacing loosening problem, the connecting axle 67 that locking member 61 is connected to counterpart 59 can be an eccentric shaft, and rotates through the said eccentric shaft of operation; The eccentric axis that makes said eccentric shaft changes with respect to the distance of locating part 57, realizes regulating the rate of tension of locking member 61.Be that said connecting axle 67 comprises the connecting axle limiting section 69 that extends and have the circumferential flank of tooth along central axis; And the eccentric part 71 that extends and connect locking member 61 from connecting axle limiting section 69 off-centre; Away from the end of connecting axle limiting section 69 connecting portion 73 is set at eccentric part 71, and connecting portion 73 extends with connecting axle limiting section 69 coaxial lines.Connecting portion 73 is used for connecting with lid 65.The position that counterpart 59 is installed connecting axle limiting sections 69 is provided with the hole 75 that can join with connecting axle limiting section 69 shapes.When spacing loosening problem occurring; The user can take out connecting axle 67 from hole 75, and turns an angle around the central axis of connecting axle limiting section 69, because the setting of eccentric part 71 and connecting axle limiting section 69 off-centre; Thereby the eccentric axis of eccentric part 71 is rotated with respect to said central axis; The distance that has realized said eccentric axis to locating part 57 changes, and impels locking member 61 to be made locking member 61 tightr with cooperating of locating part 57 by further tensioning.

Above-mentionedhandle 11 pivots with the locatingpart 57 ofhousing 13 throughcounterpart 59 and is connected; And through the two position relation of lockingmember 61 lockings; For make between handle 11 and thehousing 13 be connected more stable; Be provided with in the inboard ofcounterpart 57 all the time and the contactedsmooth surface 58 of the outer surface of locatingpart 57, no matter promptly retainingmechanism 14 is in said lock-out state or release conditions,smooth surface 58 contacts with the outer surface of locatingpart 57 all the time.Outer surface corresponding to locatingpart 57 is provided with limited impression, andsmooth surface 58 contacts with the top of the sidewall of each limited impression.So make between handle 11 and thehousing 13 be connected highly stable, when lockingmember 61 is in locked position, locatingpart 57 back to a side of lockingmember 61 can withsmooth surface 58 tight butt mutually; Be the spacing reaction force that provides between lockingmember 61 and the locatingpart 57; When lockingmember 61 was in the off-position,smooth surface 58 contacted with locatingpart 57, thereby madehousing 13 stable rotating with respect to handle 11; Realize can not shaking between the two, thereby improved operational comfort.

See also Fig. 3, Fig. 5 and Fig. 6, operating parts 63 can operated tension or is loosened locking member 61, thereby makes locking member 61 be in locked position or off-position.In this embodiment, operating parts 63 is a spanner, and the one of which end is an operating portion, and the other end is hub switch side cylindraceous, and has operating parts pivot center V, and off-centre is provided with rotating shaft 64 in the hub switch side, and is connected with locking member 61 through rotating shaft 64.Operating parts 63 has corresponding operating parts locked position of locked position and off-position and the operating parts off-position with locking member 61.Operating portion when user's operating operation spare 63; Operating parts 63 is clockwise rotated along direction E with respect to the operating parts pivot center V of hub switch side; Rotating shaft this moment 64 can be rotated with respect to said operating parts pivot center V; And then drive the convexity of locking member 61 and the limited impression engagement of locating part 57, even locking member 61 is in locked position, this moment, operating parts 63 was in said operating parts locked position; Operating portion when user's operating operation spare 63; Operating parts 63 is rotated counterclockwise along direction F with respect to operating parts pivot center V; Rotating shaft 64 this moment can be cancelled the pulling force to locking member 61; Make the limited impression of the convexity disengaging locating part 57 of locking member 61, promptly locking member 61 is in the off-position, and this moment, operating parts 63 was in said operating parts off-position.

Operating parts pivot center V is parallel with electrical axis X; Thereby the radial displacement that the link that makes operatingparts 63drive locking member 61 throughrotating shaft 64 produces relative electrical axis X; Even the end that lockingmember 61 is connected with operatingparts 63, realizes that retainingmechanism 14 is in the lock state with respect to the radially generation displacement ofhandle 11 along electrical axis X.Because electrical axis X is vertical with the bearing of trend of reciprocatinglever 29; So the operating parts pivot center V also bearing of trend with reciprocatinglever 29 is vertical; This moment,motor 25 laid respectively at the relative both sides of reciprocatinglever 29 with retainingmechanism 14, thereby made complete machine structure compact and reasonable more.

Certainly; Operating parts 63 is not limited to the technical scheme of foregoing description, and those skilled in the art also possibly make other change designs under teachings of the present invention, as the slippage button with position attributive function; Promptly groove circumferentially is set at counterpart 59; Said slippage button can slide in said groove, and through some breach are set in recess sidewall, and some convexities are set on button cooperate with said breach; Realize limiting the position of said slippage button; One end of locking member 61 is connected with said slippage button, when the said slippage button of operation is in different positions, just can realizes driving locking member 61 and be in said locked position or said off-position.Certainly; Reciprocal cutting tool 10 also can not have operating parts 63 and an end parts of locking member 61 parts of attended operation originally 63 is stretched out counterpart 59; And on counterpart 29, convexity is set; The part of stretching out counterpart 59 at locking member 61 is provided with through hole, and the user can make said through hole match with said convexity by manual operation locking member 61, realizes that locking member 61 is in said locked position; And can operate locking member 61 said through hole is separated with said convexity, realize that locking member 61 is in said off-position.Certainly, those skilled in the art can also make other change designs, but as long as the function of its realization and the effect that reaches are identical with the present invention or close, all should be covered by in the protection domain of the present invention.

See also Fig. 3;Lid 65 is used for cooperating withcounterpart 59 and forms receiving space; Simultaneously it also is used for the connectingportion 73 of matching and fixing connectingaxle 67, and has the resettlement section (not shown) corresponding with the operating parts resettlement section ofcounterpart 59 60, is used for partly accommodating the hub switch side of operatingparts 63; So realize spacing to operatingparts 63 hub switch sides, and make that more overall structure is more reliable and more stable through operatingparts resettlement section 60 and said resettlement section.Can make the installation of retainingmechanism 14 more firm throughlid 65 is set, and can prevent the contamination by dust retaining mechanism, thereby make outward appearance more attractive in appearance simultaneously the service life ofprolongation retaining mechanism 14.

See also Fig. 1 and Fig. 3;Power brick 12 parts are contained in thegrip part 45, and inpower brick 12 relative both sides abutton 18 with limited bolt 16 are set respectively, and in the inside ofbutton 18 the resetting-mechanism (not shown) are installed; Whenpower brick 12 is mounted to grippart 45; Can be through the protruding (not shown) clamping of limited bolt 16 withgrip part 45 madial walls, the position of realizing limitingbattery bag 12 is when the user need take offpower brick 12; Thereby can press thebutton 18 and make limited bolt 16 and said protruding the disengagement, just can take advantage of a situation and pull outpower brick 12 this moment.It is very convenient fast that the dismounting that makespower brick 12 so is set, and offers convenience to the user.In this embodiment, the battery in thepower brick 12 is a lithium battery, and the voltage ofpower brick 12 is 12V; This moment, the volume ofpower brick 12 was less; Satisfy the miniaturization demand of instrument, and can sufficient power be provided, thereby make the performance ofreciprocal cutting tool 10 reach best for cutting work.

Certainly; The mode thatpower brick 12 is installed ongrip part 45 is not limited to technique scheme; Those skilled in the art can also adopt other modes that power brick is installed under teachings of the present invention; But, all should be covered by in the protection domain of the present invention as long as its technical spirit and the present invention are same or similar.Equally; The voltage of thepower brick 12 among the present invention is not limited to 12V; Its inner battery of installing also is not limited to lithium battery; Those skilled in the art can change design according to actual needs, but as long as the function of its realization with the effect that reaches and the present invention is same or similar all should be covered by in the protection domain of the present invention.

See also Fig. 8; Be thereciprocal cutting tool 100 that second embodiment of the invention provides, it comprises handle 111, is installed on thepower brick 112 of handle 111; Pivot is installed on thehousing 113 on the handle 111; Be housed in the motor (not shown) in thehousing 113,, be installed on thesaw blade 117 on the reciprocating lever 129 by motor-driven reciprocating lever 129.

Thereciprocal cutting tool 10 that the structure of reciprocal cutting tool 110 and first embodiment of the invention provide is basic identical; Its difference is: handle 111 have the resettlement section 176 of accommodating electric elements against plate 155; Promptly the inside against plate 155 is that hollow structure forms resettlement section 176; And between resettlement section 176 and grip part 145, be formed with and grip space 146, thereby grip part 145 is set up in parallel with resettlement section 176 mutually, switch 147 is between grip part 145 and resettlement section 176.

Said resettlement section 176 comprises power brick resettlement section 177 and fan resettlement section 179.Extend along the longitudinally against plate 155 power brick resettlement section 177; And the bearing of trend of power brick resettlement section 177 electrical axis with said motor all the time is vertical and parallel with saidsecond abutment face 156; Its end back tosaw blade 117 has opening; Be used to supplypower brick 112 to insert, and pass through the position of buckle mode limiting battery bag 112.So make very easily dismounting ofpower brick 112, and whenreciprocal cutting tool 100 between said first duty and second duty conversion after, can not causepower brick 112 inconvenient dismounting because of the variation of duty.

Sopower brick 112 is arranged on plate 155; And will only the control circuit board (not shown) be arranged in the grip part 145; Because the size of control circuit board is less relatively, make the internal diameter size of grip part 145 can be more flexible, in this embodiment; The internal diameter size of grip part 145 is less than the internal diameter size ofgrip part 45 in first embodiment; So just can improve the comfort level that grips of handle 111, and improve, make overall structure more reasonable against the space availability ratio of plate 155.

Power brick 112 so makespower brick 112 can not exceedsecond abutment face 156 betweensecond abutment face 156 and grip part 145, makessecond abutment face 156 when workpiece cuts, and can not receive the influence ofpower brick 112.

Be appreciated that owing to the inside against plate 155 is that hollow structure forms resettlement section 176, thus can think that alsosecond abutment face 156 is positioned on the resettlement section 176, promptly resettlement section 176 back to the grip part 145 surface.

Certainly; The position of resettlement section 176 is not limited to be arranged on plate 155; It also can be located at grip part 145 away from the side against plate 155, and also the structure through support arm described in similar the present invention connects, again or resettlement section 176 be arranged on the end of grip part 145 away fromhousing 113; And with the setting of the bearing of trend approximate vertical of the bearing of trend of resettlement section 176 and grip part 145, promptly the bearing of trend ofpower brick 112 is approximately perpendicular to the bearing of trend of grip part 145.By the way, all can realize being contained in the electric elements in the grip part 145,, be arranged in the outside resettlement section 176, grip part 145, realize that the size of grip part 145 can be done lessly like power brick etc., make grip more comfortable.Certainly those skilled in the art also possibly make other technical scheme, but as long as the function of its realization and effect and the present invention are same or similar, all should be covered by in the protection domain of the present invention.

Please consult Fig. 9 and Figure 10 in the lump, fan resettlement section 179 is positioned at a side of closing on first bracing frame 115 against plate 155, promptly be positioned at resettlement section 176 and power brick 112 back to an end.Fan component 181 is used for when reciprocal cutting tool 100 is in second duty, carrying out drifting dust.Corresponding 179 sides in the face of grip part 145 are provided with fresh air inlet 183 in the fan resettlement section, on the end face of power brick 112, set out air port 184 in resettlement section 176.When reciprocal cutting tool 100 was in second duty and cuts work, it just can carry out drifting dust through fan component 181 independently.Because the close together between air outlet 184 and the saw blade 117; And when air-flow when air outlet 184 blows to the position of saw blade 117 cutting; The flow direction of air-flow and the angle of surface of the work are less; The chip that makes the air-flow band the cutting generation so is set moves along the direction that is roughly parallel to surface of the work, it can not hinder user's sight line, has avoided traditional drifting dust structure simultaneously yet; Air-flow causes dust direction motion to vertical surface of the work under the ordering about of reaction force perpendicular to surface of the work, damage the phenomenon of user's eyes easily.

In this embodiment, see also Figure 12, there are an angular range in the flow direction and the surface of the work that blow to effective air-flow of surface of the work drifting dust from air outlet 184.Maximum angle is β in the said angular range, and minimum angle is γ, thereby between angle β and angle γ, forms effective drifting dust zone, and the position ofsaw blade 117 cut workpiece is positioned at said angular range, makes the drifting dust effect reach best.The angle value of angle β is selected from 20 degree to 45 degree, and the angle value of angle γ is selected from 0 degree to 20 degree, and is preferred, and the angle value of angle β is 25 degree, and the angle value of angle γ is 10 degree.

Certainly,exhaust vent 184 can be more nearsecond abutment face 156, thereby make the air-flow that blows out fromexhaust vent 184 be parallel to surface of the work, also has preferable drifting dust effect this moment.

Be appreciated that; Above-mentioned announcement is installed the mode offan component 181 and is not limited on thereciprocal cutting tool 100 that is installed in the announcement of this embodiment; Those skilled in the art can select other cutting tool is adopted the mode thatfan component 181 is installed in this embodiment under teachings of the present invention, but as long as its mounting means that adopts is identical with the present invention or close; And, all should be covered by in the protection domain of the present invention in order to realize and same or analogous function of the present invention and effect.

Please consult Fig. 9 and Figure 10 in the lump in this embodiment,fan component 181 comprisesfan hub 185, fan electromotor (not shown), turbine 187.Wherein,fan hub 185 is contained in inside with fan electromotor andturbine 187, can protect internal structure.Fan electromotor is arranged at the center ofturbine 187, rotates thereby when energising work, drive turbine 187.Fan electromotor is a dc brushless motor, and so setting can effectively prolong the life-span offan component 181, and independent fanelectromotor driving turbine 187 realization raising drifting dust efficient are set.Fan electromotor is connected withpower brick 112 through switch 147, and is controlled by switch 147, and when switch 147 triggerings, the fanelectromotor drive turbine 187 of just working simultaneously carries out drifting dust work.

See also Fig. 8, grip space 146 between grip part 145 and resettlement section 176, its finger that is used to supply the user passes and realizes gripping grip part 145 from gripping space 146, or the finger for realizing that above-mentioned purpose is accommodated the user.

Be appreciated that; The resettlement section 176 that being used for of disclosing in this embodiment accommodated electric elements is not limited to be installed in thereciprocal cutting tool 100 that this embodiment is described; It can also be installed on other portable power tools such as portable electric circular saw, electric drill, electric hammer or screwdriver etc., does not enumerate one by one as space is limited at this, but as long as its technical scheme that adopts and the present invention are same or similar; And realized being covered by same or analogous function and effect in the protection domain of the present invention.

See also Figure 11,, can abrasion-resistant coating be set, maybe should adopt high-abrasive material to process in the surface on the surface that contacts with workpiece against plate 155 in order to improve the wearability against the plane that plate 155 contacts with workpiece of handle 111.In this embodiment, be provided with a backing plate 189 on surface against plate 155 towards workpiece, be resisted against through backing plate 189 on the surface of workpiece against plate 155, promptlysecond abutment face 156 is the surface of backing plate 189 towards workpiece.Backing plate 189 adopts high-abrasive material to process like materials such as plastics, metals, and preferably it is processed for metal material, like iron, stainless steel, aluminium alloy or copper etc.

In order to prolong the service life ofreciprocal cutting tool 100; Backing plate 189 can adopt dismountable mode to be installed on plate 155, so, backing plate 189 is occurred after the heavy wear; Just can in time change, thus the service life of realizing prolongationreciprocal cutting tool 100.

Please consult Fig. 8 and Figure 12 in the lump,lid 165 is provided with and is used for the acceptinggroove 168 that part is accommodated operating parts 163, and acceptinggroove 168 is along the circumferential extension of electrical axis X.Operating parts 163 and acceptinggroove 168 shape are mutually joined; When operating parts 163 is in the operating parts locked position; Operating parts 163 can partly be contained in the acceptinggroove 168; Make the integral body of operating parts 163 be positioned at the circumferential profile of counterpart 159, thereby realize rationally utilizing the space, reduced the volume ofreciprocal cutting tool 100 with respect to electrical axis.Preferably; Operating parts 163 has anoperating side 170; When operating parts 163 was in said operating parts locked position, the circumferential profile of counterpart 159 with respect to electrical axis X can be stretched out along the radial component of electrical axis X in saidoperating side 170, so that user's operation.

Reciprocal cutting tool among the present invention has first duty and second duty; And the area that is resisted against surface of the work through second duty is resisted against the area of surface of the work greater than it in first duty; Cut workpiece can be highly stable reliable when second duty to make it; Be applicable to and carry out meticulous cutting work, and said reciprocal cutting tool when being in first duty because to be resisted against the area of surface of the work less relatively, be applicable to roughing such as fast shut-off object.The overall performance that has improved reciprocal cutting tool so is set, and has promoted operational comfort, bring great convenience to the user.

The present invention is not limited to aforementioned embodiments, and those skilled in the art also possibly make other changes under the enlightenment of technical spirit of the present invention, but as long as function and the present invention of its realization are same or similar, all should be covered by in the protection domain of the present invention.

Claims (16)

1. a reciprocal cutting tool is used for cut workpiece, comprising:

Handle;

With the housing that said handle pivots and is connected, it is exercisable with respect to said handle rotation, makes said reciprocal cutting tool have first duty and second duty;

Be contained in the motor in the said housing;

The saw blade that moves reciprocatingly by the driving of said motor;

It is characterized in that:

Said reciprocal cutting tool is resisted against surface of the work in second duty area is resisted against the area of surface of the work greater than it in first duty.

2. reciprocal cutting tool as claimed in claim 1; It is characterized in that: said housing has first abutment face; Said handle has second abutment face, when said reciprocal cutting tool is in said first duty, only by said first abutment face against said workpiece; When said reciprocal cutting tool was in said second duty, said first abutment face and said second abutment face were jointly against said workpiece.

3. reciprocal cutting tool as claimed in claim 2 is characterized in that: when said reciprocal cutting tool was in said second duty, said first abutment face and the said second abutment face coplane were against said workpiece.

4. reciprocal cutting tool as claimed in claim 2 is characterized in that: when said reciprocal cutting tool was in said first duty, said first abutment face and said second abutment face intersected not coplane.

5. reciprocal cutting tool as claimed in claim 4 is characterized in that: when said reciprocal cutting tool was in said first duty, said first abutment face was vertical with said second abutment face.

6. reciprocal cutting tool as claimed in claim 2 is characterized in that: said housing has first bracing frame, and said first abutment face is positioned on said first bracing frame, and said handle comprises grip part and second bracing frame with said second abutment face.

7. reciprocal cutting tool as claimed in claim 6; It is characterized in that: said second bracing frame have can against workpiece against plate; And saidly be provided with fan component against plate, said fan component is used for when said reciprocal cutting tool is in second duty, carrying out drifting dust.

8. reciprocal cutting tool as claimed in claim 7 is characterized in that: said fan component is driven by independent fan electromotor.

9. reciprocal cutting tool as claimed in claim 6 is characterized in that: said second bracing frame have can against workpiece against plate, and said power brick of accommodating promising said fan component and the power supply of said motor on the plate.

10. reciprocal cutting tool as claimed in claim 9 is characterized in that: said power brick is between said second abutment face and said grip part.

11. reciprocal cutting tool as claimed in claim 10 is characterized in that: said have the resettlement section of extending along longitudinally and partly accommodate said power brick against plate, and the bearing of trend of said resettlement section is vertical with said electrical axis.

12. reciprocal cutting tool as claimed in claim 11 is characterized in that: the end of said power brick from said resettlement section back to said saw blade inserts said resettlement section.

13. reciprocal cutting tool as claimed in claim 6 is characterized in that: said second bracing frame is provided with backing plate towards the surface of workpiece, and said second abutment face is the surface of said backing plate towards workpiece.

14. reciprocal cutting tool as claimed in claim 13 is characterized in that: the material of said backing plate is plastics or metal.

15. reciprocal cutting tool as claimed in claim 1 is characterized in that: when said reciprocal cutting tool when said first duty is converted to said second duty, its center of gravity can along said electrical axis radially near said handle.

16. reciprocal cutting tool as claimed in claim 2 is characterized in that: when said reciprocal cutting tool is in said first duty, said first abutment face and the parallel not coplane of said second abutment face.

Images