CN103203776A - Portable disk saw and cutting depth adjusting method thereof - Google Patents

Abstract

The invention provides a portable disk saw, comprising a disk saw blade, a shell, a motor held in the shell and used for driving the disk saw blade, a shield which is movably arranged on the shell and provided with a base plate abutted against a workpiece, a first cutting depth adjusting mechanism and a second cutting depth adjusting mechanism; the base plate is provided with a saw blade through hole for allowing the disk saw blade to pass through, the shield moves between a first position and a second position relative to the shell, when the shield is positioned in the first position, the disk saw blade does not penetrate through from the saw blade through hole, and when the shield is positioned in the second position, the disk saw blade penetrates through from the saw blade through hole; the first cutting depth adjusting mechanism is used for shielding the shifting of the shield relative to the shell to adjust the cutting depth of the disk saw blade; and the second cutting depth adjusting mechanism is used for further adjusting the cutting depth when the first cutting depth adjusting mechanism is positioned in the preset cutting depth position. The portable disk saw can cut the workpiece with very high accuracy. In addition, the invention also provides a cutting depth adjusting method of the portable disk saw.

Description

Portable circular saw and cutting-in control method thereof

Technical field

The present invention relates to a kind of portable circular saw.

The present invention relates to a kind of cutting-in control method of portable circular saw.

Background technology

Existing small portable annular saw comprises a less saw blade, is used for driving the motor of saw blade, casing, and the casing front portion is used for accommodating transmission mechanism etc., and the casing rear portion is used for accommodating motor etc.This little portable electric circular saw does not arrange independent handle, and the rear portion of casing namely can be used as handle and uses.This electric circular saw does not have the independent guard shield of deciding, and the casing front portion is contained in saw blade top wherein, and this casing front portion just is equivalent to the guard shield of deciding of traditional electrical annular saw.An independent moving guard shield movably is installed on the casing front portion, this moving guard shield comprise guard shield bottom and four from the bottom upwardly extending sidewall.The guard shield bottom is provided with opening and is used for making saw blade therefrom stretch out, thereby and with respect to the anterior removable feasible saw blade depth difference of exposing of casing.This portable circular saw structure is simple relatively, relatively is fit to the thinner workpiece of cutting.

The casing front portion can arrange the cutting-in governor motion usually to satisfy the different cutting-in demand of user; and regulate in order to make things convenient for the user to finish depth of cut fast; existing cutting-in governor motion often can be regulated fast on a large scale; and stable be positioned at a certain cutting-in scale, but be difficult to carry out trickle adjusting.In some cases, need cut off a thickness such as the user is 1 cun plank since near do not have workbench to support, have to plank is placed on the ground and cut, this moment is very high to the required precision of depth of cut, otherwise the situation that can occur damaging ground or not cut off plank.Yet, all there are certain error in present manufacturing technology and plank processing technology, because the existence of this error makes when the cutting-in of cutting-in governor motion indication is 1 cun, also can't make saw blade can cut off plank accurately and not injure ground.Because existing cutting-in governor motion is difficult to the fine adjustments cutting-in, causes to remedy error, is difficult to satisfy the demand of user's high accuracy cutting.

Summary of the invention

The invention provides a kind of portable circular saw and control method thereof with high cutting accuracy.

The invention provides a kind of portable circular saw, be used for cut workpiece, it comprises: the saw blade that is used for cut workpiece; Housing; Be housed in the motor that is used for driving described saw blade in the described housing; Movably be installed on the guard shield on the described housing, described guard shield has the base plate against described workpiece, described base plate is provided with the saw blade through hole and therefrom passes for described saw blade, described guard shield moves between primary importance and the second place with respect to described housing, when described guard shield is positioned at described primary importance, described saw blade does not pass from described saw blade through hole, and when described guard shield was positioned at the described second place, described saw blade passed from described saw blade through hole; Be used for the described relatively housing displacement of the described guard shield of backstop with the first cutting-in governor motion of the cutting-in of regulating described saw blade; Described portable circular saw also is included in the first cutting-in governor motion and is in when being scheduled to the cutting-in position, to the further second cutting-in governor motion of regulating of cutting-in.

Preferably, the described first cutting-in governor motion has the stop surface of the described guard shield of backstop, described base plate has the abutment face that contacts with described workpiece, the described second cutting-in governor motion can be regulated the distance between described stop surface and the described abutment face after the described first cutting-in governor motion is adjusted to predetermined cutting-in position.

Preferably, the described second cutting-in governor motion comprise be arranged on described guard shield or the described first cutting-in governor motion the two one of on screwed hole, and the screw that connects with described screwed hole phase screw thread, described screw can with described guard shield or the described first cutting-in governor motion another butt in the two.

Preferably, described screw comprises for the head that connects with the described first cutting-in governor motion or described guard shield, and with the afterbody that described screwed hole phase screw thread connects, be provided with flexible member between described head and described guard shield or the described first cutting-in governor motion.

Preferably, the described first cutting-in governor motion comprises the fluting that is arranged on the described housing, and the adjusting part that can slide in described fluting and can locate at an arbitrary position.

Preferably, the described second cutting-in governor motion comprise be arranged on described guard shield or the described first cutting-in governor motion the two one of on threaded post, and screw thread connects the nut on described threaded post, and described nut can another connects in the two with described guard shield or the described first cutting-in governor motion.

Preferably, the second cutting-in governor motion comprises the rotating gear that is arranged on the described guard shield, by described gear drive and the tooth bar that connects with the described first cutting-in governor motion, and the locking member that can lock the position of described gear.

Preferably, the flank of tooth that described gear has locking face and cooperates with described tooth bar, described locking member is the locking spanner with inclined-plane, and described locking member is exercisable to be in by described inclined-plane and to exert pressure to lock the locked position of described gear to described locking face, or the off-position of separating with described locking face, described inclined-plane.

The present invention also provides a kind of cutting-in control method of portable circular saw, the workpiece that is used for the cutting predetermined thickness, described workpiece has towards the first surface of described portable circular saw with back to the second surface of described portable circular saw, described portable circular saw has cutting-in is carried out the first cutting-in governor motion of coarse adjustment and the second cutting-in governor motion that cutting-in is carried out fine tuning, described cutting-in control method comprises: regulate the first cutting-in governor motion, cutting-in is adjusted to the scale corresponding with the thickness of described workpiece; Regulate the second cutting-in governor motion, make cut edge and the described second surface of saw blade of described portable circular saw tangent.

In disclosed portable circular saw, by being provided with the second cutting-in governor motion that can carry out fine tuning, make and use the first cutting-in governor motion to finish after the adjusting, can remedy the error that produces in the workpiece manufacture process by the second cutting-in governor motion, make and come facility to the user by portable circular saw processing work very accurately.

Description of drawings

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

The schematic perspective view of the portable circular saw that Fig. 1 provides for first embodiment of the invention;

Fig. 2 is the part schematic diagram of portable circular saw among Fig. 1, and wherein guard shield is in primary importance;

Fig. 3 is the decomposing schematic representation of adjusting part among Fig. 1;

Fig. 4 is the part schematic diagram of portable circular saw among Fig. 1, and wherein to be in second place cutting thickness be 1 cun workpiece to guard shield;

Fig. 5 is the guard shield of portable circular saw among Fig. 1 and the schematic perspective view of the second cutting-in governor motion;

Fig. 6 is the part schematic diagram of portable circular saw among Fig. 1, and wherein saw blade is cut just and worn workpiece;

Fig. 7 is the part schematic diagram of portable circular saw among Fig. 1, and wherein to be in second place cutting thickness be 1/2 cun workpiece to guard shield;

Fig. 8 is the schematic diagram of the saw blade of portable circular saw among Fig. 1;

Fig. 9 is the vertical view of guard shield and the second cutting-in governor motion among Fig. 5;

The guard shield of the portable circular saw that Figure 10 provides for second embodiment of the invention and the signal of the solid of the second cutting-in governor motion;

Figure 11 is the part decomposing schematic representation of guard shield and the second cutting-in governor motion among Figure 10.

Wherein:

10. portablecircular saw 22.head capsule 47a. first surfaces

12. housing 24. connectingportion 47b. second surfaces

14. saw blade 26.motor shells 48. flutings

15. sawtooth 28. generatinglasers 50. adjusting parts

16.guard shield 44.head capsule sidewalls 52. installing plates

17. saw blade plane 45. locating parts, 54. spanners

18.switch module 46. first cutting-ingovernor motions 56. connectors

20.tool drives axle 47.workpiece 58. pointers

60.base plate 73b.second surface 92. gears

62.guide rail 74. screws 94. tooth bars

64.host cavity 76. springs 96. locking members

66.abutment face 78. reference marks 98. first flank of tooth

68. saw blade throughhole 80. first cue marks 100. locking faces

69. lugboss 82. second cue marks 102. second flank of tooth

70. the second cutting-in governor motion, 84. cut edge lines, 104. confined planes

72. screwedhole 86. first intersection points 106. inclined-planes

73.workpiece 88. second intersection points 108. gear resettlement sections

73a. first surface 90. second cutting-ins are regulated and are beaten a drum

Specific embodiment

See also Fig. 1, first embodiment of the invention provides a kind of portable circular saw 10 to comprise housing 12, be housed in the motor (not shown) in the housing 12, be positioned at housing 12 and the transmission of power of motor given the transmission component (not shown) ofsaw blade 14, theguard shield 16 that is installed on the housing 12 and can slides with respect to housing 12, and be positioned at theswitch module 18 that whether the control motor works on the housing 12.

The power supply of portable circular saw 10 is AC power, namely powers to motor by AC power, and this moment, portable circular saw 10 had stronger power, and not limited by electric weight, was applicable to work long hours.Certainly portable circular saw 10 also can be designed to the structure of direct current supply, namely at portable circular saw 10 power brick is installed, power to motor by power brick, this moment, portable circular saw 10 portability were better, it can not be subjected to the influence of power line, and the user can carry portable circular saw 10 and carry out cutting work in any place.

Motor can be carbon brush motor, brushless motor etc., and perhaps corresponding to the energy source of portable circular saw 10, motor can be alternating current motor or d.c. motor.Motor has the motor output shaft (not shown), and by gear is installed with the rotation output of motor at motor output shaft.

Transmission component and motor output shaft connect, and the rotation that motor output shaft is exported passes to saw blade 14.Transmission component comprises for the tool drives axle 20 that sawblade 14 is installed, and tool drives axle 20 has axisH-H.Saw blade 14 is installed on an end of tool drives axle 20, and the other end of tool drives axle 20 can connect by the gear of direct geared and motor output shaft, realizes that motor-driven tool driving shaft 20 rotates.Certainly, between motor output shaft and tool drives axle 20, reduction gearing etc. can also be set, no longer describe in detail as space is limited at this.Axis H-H is can be with the axis of motor output shaft perpendicular or be arranged in parallel, and in the present embodiment, axis H-H is vertical mutually with the axis of motor output shaft.

See also Fig. 1 and Fig. 4, sawblade 14 is saw blade, it has the sawtooth 15 of circumferential setting and has formedcircular cut edge 19, and two parallel saw blade planes 17 (only illustrating among the figure) have been formed, sawblade plane 17 is perpendicular with the axis H-H of tool drives axle 20, thereby sawblade plane 17 and the lengthwise bearing of trend of housing 12 are parallel to each other.Central area onsaw blade plane 17 is provided with installing hole, is used forsaw blade 14 is fixedly mounted on tool drives axle 20.

See also Fig. 1, housing 12 integral body are extended along the first lengthwise bearing of trend vertical with axis H-H, and housing 12 comprises and is positioned at the motor shell 26 that an end and resettlement section are divided thehead capsule 22 ofsaw blade 14 and be positioned at the other end.

Motor shell 26 is used for accommodating fixing motor, and motor shell 26 is provided with air inlet (not shown) and air outlet (not shown).

The part that is connected withhead capsule 22 at motor shell 26 forms connecting portion 24.Connecting portion 24 parts are accommodated transmission component, and in order more rationally to utilize the structure of connecting portion 24, connecting portion 24 has been designed to the grip part of portable circular saw 10, be that the user carries out cutting work by holding grip part operation portable circular saw 10, because the holding area is betweenhead capsule 22 and motor shell 26, namely grip part andhead capsule 22 are adjacent.The user is equivalent to constitute fulcrum when holding the grip part betweenhead capsule 22 and motor shell 26, the part of fulcrum both sides can be in mutual restriction under the gravity effect separately, realize that the user holds after the grip part, portable circular saw 10 is in state more stably, be very easy to carry out cutting operation, improved the comfort level of operation, preferred, the center of gravity of portable circular saw 10 is positioned on the grip part, and this moment, portable circular saw 10 had the optimal operations comfort level.

Certainly; the grip part is not limited to be formed on connecting portion 24, also can be for motor shell 26 form the grip part, and those skilled in the art also may make other change; but as long as its function and effect and the present invention are same or similar, all should be covered by in the protection domain of the present invention.

Head capsule 22 is used forguard shield 16 is installed, and can accommodate the part transmission mechanism and sawblade 14 is divided in the resettlement section.The tool drives axle 20 of transmission mechanism is contained in thehead capsule 22, andhead capsule 22 has for the opening that connects withguard shield 16, and sawblade 14 parts are goed deep in the opening, and are mounted on the tool drives axle 20.

Athead capsule 22 generating laser 28 is installed.Generating laser 28 can send laser, form a cutting index line, namely when the user promoted portable circular saw 10 and cuts work, sawblade 14 can cut along cutting index line, the cutting accuracy that has improved the user so is set, and has brought facility to the user.

Head capsule 22 has two head capsule sidewalls 44 vertical with the axis H-H of tool drives axle 20, and namely the bearing of trend of two statureshell side walls 44 is parallel with thesaw blade plane 17 ofsaw blade 14, and two statureshell side walls 44 lay respectively at a side of saw blade 14.Be respectively arranged with the locating part 45 that cooperates forguard shield 16 at eachhead capsule sidewall 44 back to the surface of saw blade 14.Afterguard shield 16 was mounted tohead capsule 22, it can cooperate with locating part 45 realized sliding within the specific limits with respect to head capsule 22.In the present embodiment, locating part 45 is for being installed on the bearing on thehead capsule sidewall 44 by screw, and the quantity of eachhead capsule sidewall 44 upper limit spare 45 is three, and is highly stable whenguard shield 16 is slided with respect tohead capsule 22.

See also Fig. 4, theworkpiece 47 of portable circular saw 10 cutting predeterminedthickness.Workpiece 47 has towards thefirst surface 47a of portable circular saw 10 with back to thesecond surface 47b of portable circular saw 10, and when cutting work, portable circular saw 10 is resisted against on thefirst surface 47a.

See also Fig. 2 and Fig. 3, in order to realize the cutting of depthkeeping degree, athead capsule 22 the first cutting-ingovernor motion 46 is installed, it can realize regulating fast the depth of cut of portable circular saw 10, namely regulateguard shield 16 with respect to the position ofhead capsule 22, be applicable to the coarse adjustment to cutting-in, can realize being adjusted to arbitrary predetermined cutting-in position.

The first cutting-ingovernor motion 46 can be positioned at anyhead capsule sidewall 44 above, can certainly be provided with the first cutting-ingovernor motion 46 respectively on the two stature shell side walls 44.In the present embodiment, only on the statureshell side wall 44 the first cutting-ingovernor motion 46 is set therein.The adjustingpart 50 that the first cutting-ingovernor motion 46 is included in thefluting 48 on thehead capsule sidewall 44 and can slides and can locate at an arbitrary position in fluting 48, the cutting-in that portable cutter 10 is regulated in realization is a predetermined cutting-in.Be provided with the scale of sign cutting-in near the position of fluting 48 athead capsule sidewall 44.

Adjustingpart 50 comprises thespanner 54 that is positioned athead capsule 22inner installing plates 52, has cam surface, connects theconnector 56 ofspanner 54 and installingplate 52, and is installed on the installingplate 52 and indicates thepointer 58 ofcurrent scale.Spanner 54 is exercisable exerts pressure to headcapsule sidewall 44 by cam surface,head capsule sidewall 44 is clamped between cam surface and the installingplate 52, thus the location of realizing adjustingpart 50, this moment,pointer 58 indicated scales were the degree of depth of portable circular saw 10 cuttings.In the present embodiment, the depth of cut scope of portable circular saw 10 is 0 to 1 cun.Owing to regulate cutting-in by adjustingpart 50 along fluting 48, make adjustment process very quick, realized the coarse adjustment to cutting-in.The first cutting-ingovernor motion 46 realizes regulating depth of cut by adjustingpart 50 with respect to the mode that headcapsule 22 slides, and makes the adjusting operation very convenient fast.

When by after the position ofspanner 54lock adjustment assemblies 50, to operateguard shield 16 at this moment and move with respect tohead capsule 22, guard shield defines the position ofguard shield 16 just by the cam surface ofspanner 54 institute backstop, and the cutting-in that realizes restriction sawblade 14 is the scale of pointer indication.In the present embodiment, nationality has been formed the stop surface ofbackstop guard shield 16 by described cam surface, realize limiting the position ofguard shield 16, certainly those skilled in the art also may adopt the other technologies scheme, such as the stop part that together move with installingplate 52 being set withbackstop guard shield 16, and at the described stop surface of stop part formation.Those skilled in the art also may make other change, no longer describe in detail as space is limited.

See also Fig. 1, Fig. 2 and Fig. 4.Guard shield 16 can be accommodatedsaw blade 14 jointly withhead capsule 22, andguard shield 16 can makeguard shield 16 have primary importance and the second place with respect tohead capsule 22 slips.As shown in Figure 2, whenguard shield 16 was in primary importance, sawblade 14 integral body were housed in the space that guardshield 16 andhead capsule 22 surround, and as shown in Figure 4, whenguard shield 16 was in the second place, sawblade 14 stretches outguard shield 16 can carry out cutting work.

See also Fig. 5,guard shield 16 comprise for against thebase plate 60 of workpiece, theguide rail 62 that is used for cooperating with locating part 45, for the sawblade host cavity 64 of accommodatingsaw blade 14.

Base plate 60 has for theabutment face 66 against workpiece, and when portable circular saw 10 cut workpiece,abutment face 66 is resisted against surface of the work, and can slide with respect to surface of the work, makessaw blade 14 cut workpiece.Also be provided with saw blade throughhole 68 and be used for makingsaw blade 14 therefrom pass onbase plate 60, whenguard shield 16 was positioned at primary importance, sawblade 14 did not pass from saw blade throughhole 68, and whenguard shield 16 was positioned at the second place, sawblade 14 passed from saw blade throughhole 68.

Guide rail 62 is installed on thebase plate 60, is used for cooperating with locating part 45, realizes thatguard shield 16 can slide with respect to head capsule 22.In the present embodiment, the quantity ofguide rail 62 is two, whenguard shield 16 is assembled to portable circular saw 10, twoguide rails 62 respectively be arranged on two statureshell side walls 44 on locating part 45 cooperate,guard shield 16 is slided with respect to portable circular saw 10, and sawblade host cavity 64 can be contained inhead capsule 22 inside.

On guard shield 16, also be provided with the second cutting-in governor motion 70 that the cutting-in of portable circular saw 10 is carried out fine tuning, be applicable to when the first cutting-in governor motion 46 is in predetermined cutting-in position, further regulate by 70 pairs of cutting-ins of the second cutting-in governor motion, make cut edge 19 and the tangent realization of second surface 47b accurately cut.The second cutting-in governor motion 70 is arranged between guard shield 16 and the first cutting-in governor motion 46, after 46 adjustings of the first cutting-in governor motion are finished, distance between described stop surface that can be by the second cutting-in governor motion, 70 fine adjustments, the first cutting-in governor motion 46 and the abutment face 66 of guard shield 16 realizes finely tuning cutting-in.The second cutting-in governor motion 70 can be arranged on the guard shield 16, also can be set directly on the first cutting-in governor motion 46, in the present embodiment, guard shield 16 has lug boss 69, the second cutting-in governor motion 70 is arranged on the lug boss 69, when guard shield 16 moved to the second place, the second cutting-in governor motion 70 and the first cutting-in governor motion 46 connected, and realized limiting the position of guard shield 16.

The second cutting-in governor motion 70 can automatically lock adjusting position, after the adjusting second cutting-in governor motion 70 that can operate, the second cutting-in governor motion 70 stops at the position after the adjusting immediately, makes the second cutting-in governor motion 70 have very high degree of regulation.In the present embodiment, the second cutting-in governor motion 70 comprises the screwed hole 72 that is arranged on the guard shield 16, the screw 74 that connects with described screwed hole 72 phase screw threads.Screwed hole 72 is arranged on the side that guide rail 62 closes on the first cutting-in governor motion 46, and screw 74 has the head that connects with spanner 54, and has externally threaded afterbody, and screw 74 is by described afterbody and screwed hole 72 phase threaded engagement.When regulating cutting-in by the second cutting-in governor motion 70, the user can operate described head with rotating screw 74, and this moment, screw 74 meetings produced certain displacement along the direction of the center line of screw hole 72, realized regulating cutting-in.Because in the process of rotating screw 74, screw 74 is very slow along the translational speed of centerline direction, makes degree of regulation very high, has realized the fine tuning to cutting-in; Moreover screw 74 adopts threaded engagement with screwed hole 72, makes that screw 74 can automatic spacing, and when namely the user stopped operating screw 74, screw 74 just can be not again move along the direction of center line, and it is spacing accurate to realize.

Certainly, the second cutting-in governor motion 70 can also be arranged to other structures, such as being set with threaded post at guard shield 16, in threaded post nut is set, described nut and the first cutting-in governor motion 46 connect, and further regulate cutting-in by rotating nut, further, described threaded post also can be arranged on the adjusting part 50 of the first cutting-in governor motion 70, as is arranged on installing plate 52 or the connector 56, and connects with guard shield 16 and to realize further regulating cutting-in.The structure of the second cutting-in governor motion 70 is not limited to the mode that screw thread connects, and it can also adopt cam structure.Such as, a cam member that can rotate with respect to guard shield 16 is set in the position that guard shield 16 arranges screwed hole 72, after setting up the first cutting-in governor motion 46, operation portable circular saw 10 carries out cutting work, guard shield 16 moved with respect to head capsule 22 and made described cam member and spanner 54 connect this moment, just can change position that described cam member and spanner 54 connect by rotating described cam member this moment, realize regulating the distance between the first cutting-in governor motion 46 and the guard shield 16, and then realize the fine adjustments cutting-in.Certainly, those skilled in the art also may make other change under the technology of the present invention marrow enlightenment, 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.

For causingscrew 74, the vibrations that prevent from producing in cutting process change with respect to the position of screwedhole 72, between the sidewall ofscrew 74 and screwedhole 72, flexible member is set, namely between thelug boss 69 of described head andguard shield 16,spring 76 is set, make to cooperate closelyr betweenscrew 74 and the screwedhole 72, improved reliability of structure.

The second cutting-ingovernor motion 70 is regulated cutting-in by rotating manner, makes that the velocity ratio of regulating is slower, but the degree of regulation height.Regulate the first cutting-ingovernor motion 46 of cutting-in and regulate the second cutting-ingovernor motion 70 of cutting-in by rotating manner because portable circular saw 10 has by sliding type, make that portable circular saw 10 can quick and accurate adjusting cutting-in, brought facility to the user.Certainly; the concrete structure of the first cutting-ingovernor motion 46 is not limited to aforementioned description; those skilled in the art also may make other change; but as long as realize that by sliding type the function of quick adjustment cutting-in all should be encompassed in the protection domain of the present invention; in like manner; the concrete structure of the second cutting-ingovernor motion 70 is not limited to aforementioned description; those skilled in the art also may make other change, but as long as realize that by rotating manner the function of meticulous adjusting cutting-in all should be encompassed in the protection domain of the present invention.

When observingadjustment screw 74 for the ease of the user, the distance that described head moves along described center line, the position of closing on screwedhole 72 atguide rail 62 is provided withreference mark 78, punctual back to lower surface and 78 pairs of the described reference marks of the first cutting-ingovernor motion 46 when described head, this moment, screw 74 was in initial position.When being in initial position byscrew 74, described lower surface also has certain distance apart from the aperture of screwedhole 72, make thatscrew 74 can also be towards the direction adjusting position of screwedhole 72 with respect to initial position, thereby increased the adjustable range of the second cutting-ingovernor motion 70.

Certainly, the second cutting-ingovernor motion 70 also can be arranged on the adjustingpart 50 of the first cutting-in governor motion 46.Being about to screwedhole 72 is arranged on the connector, be threaded mutually with screwedhole 72 byscrew 74, atguard shield 16 projection be set and connect withscrew 74, whenadjustment screw 74, can regulate the distance betweenguard shield 16 and the first cutting-ingovernor motion 46, realize regulating cutting-in.

See also Fig. 4, in the present embodiment, the thickness ofworkpiece 47 is 1 cun, because can there be error in workpiece unavoidably in the processing and manufacturing process, make the first cutting-ingovernor motion 46 is regulated cutting-ins when being 1 cun, sawblade 14 can not be cut workpiece 47 just and wear, and can exceed thesecond surface 47b sub-fraction ofworkpiece 47 such as saw blade 14.Need to regulate the second cutting-ingovernor motion 70 this moment and carry out fine tuning, namely by rotatingscrew 74 to increase the distance between described stop surface and theabutment face 66, make and reduced depth of cut, as shown in Figure 6, this moment sawblade 14cut edge 19 just andsecond surface 47b tangent, makesaw blade 14 to cut accurately and wearworkpiece 47, and can not exceed the holding articles thatsecond surface 47b namely can not destroyworkpiece 47 belows.

See also Fig. 7, sawblade 14 has the cut direction F that parallels withabutment face 66, the user can promote theworkpiece 73 of portable circular saw 10 cutting predetermined thickness along cut direction F,workpiece 73 hasfirst surface 73a and thesecond surface 73b that is parallel to each other, and the distance betweenfirst surface 73a and thesecond surface 73b is described predeterminedthickness.Guard shield 16 is provided with first cue mark 80.First cue mark 80 can be when theworkpiece 73 ofsaw blade 14 cutting predetermined thickness, indication sawblade 14 stretches outsecond surface 73b foremost along cut direction F, thereby can clearly indicatesaw blade 14 to cut the physical location of wearingworkpiece 73 to the user, bring great convenience for user's cutting operation.

Accordingly, for clear width of indicatingsaw blade 14 to stretch outsecond surface 73b, also can second cuemark 82 be set atguard shield 16, stretch out the least significant end of second surface 71b with indication along cut direction F saw blade 14.When the user whenworkpiece 73 carries out fixed length cutting, can draw cut mark such as being beginning label and end mark atworkpiece 73, the user can aim atsecond cue mark 82 on theguard shield 16 with described beginning label, and beginning cut workpiece, immediately to and the direction of end mark promote portable circular saw 10,first cue mark 80 onguard shield 16 and described beginning label are on time, then workpiece 73 is cut fully from beginning label to end mark and is worn, make process simple, and very high machining accuracy is arranged.Further, if utilize portable circular saw 10 when the workpiece cutting next part of a monoblock predetermined thickness, such as cutting next square little plank from a bulk of plank, this moment, every limit of cutting all was equivalent to fixed length cutting one time, and finish after the fixed length cutting of four edges, the size of little plank just meets the requirements just, need not to process again.

Certainly, can a plurality of first cue marks 80 be set at guard shield 16, and the workpiece 73 of each first cue mark, 80 corresponding different-thickness, the second surface 73b that indication saw blade 14 stretches out workpiece 73 along cut direction F foremost.In like manner, correspondingly, a plurality of second cue marks 82 also can be set with the indication rearmost end.Further, see also Fig. 7 and Fig. 9, the position of closing on each cue mark at guard shield 16 arranges scale, the thickness of the workpiece 73 by described scale mark cue mark correspondence.In the present embodiment, be provided with three first cue marks 80, be provided with three second cue marks 82 accordingly.Further, the position of corresponding each first cue mark 80 and second cue mark 82 arranges scale on base plate 60, represents the workpiece of corresponding 1/4 cun, 1/2 cun and the 3/4 cun thickness of cue mark respectively.And be provided with cue mark and scale at guard shield 16 with respect to the both sides of saw blade 14, make the user can observe the cue mark of either side, determine the state of cutting, brought facility to the user.Certainly, also can be only near users' a side cue mark and scale be set at guard shield 16, during use, also can realize clearly indicating saw blade to cut the position of wearing workpiece.

See also Fig. 7 and Fig. 8, when sawblade 14cut workpiece 47, formationfirst intersection point 86 andsecond intersection point 88 are intersected with thesecond surface 47b ofworkpiece 47 in thecut edge 19 of saw blade 14.First intersection point 86 stretches out the position foremost ofsecond surface 73b to overlapping withsaw blade 14 along cut direction F,second intersection point 88 coincides along the position that cut direction F stretches out the rearmost end ofsecond surface 73b withsaw blade 14, make thecue mark 80 of winning corresponding withfirst intersection point 86, the position of i.e. first cue mark, 80 indicationsfirst intersection point 86, in like mannersecond cue mark 82 is corresponding withsecond intersection point 88, i.e. the position of second cue mark, 82 indications, second intersection point 88.Certainly, also can onlyfirst cue mark 80 be set or second cue mark, 82 corresponding positions of indicating first intersection points 86 orsecond intersection point 88 only are set atguard shield 16.

The cue mark of describing in the present embodiment only when portable circular saw 10 is in maximum cutting-in cutting of the workpiece of indicating predetermined thickness wear the position; correspondingly; cue mark also can be set to play the indicative function identical with preamble when portable circular saw 10 is in a certain specific depth of cut; perhaps; under the enlightenment of the technology of the present invention marrow; those skilled in the art also may make other change, all should be covered by in the protection domain of the present invention.

Embodiment of the present invention also provides a kind of cutting-in control method, and this cutting-in control method comprises:

Step S1: regulate the first cutting-ingovernor motion 46, cutting-in is adjusted to the scale corresponding with the thickness of workpiece 47.The user regulates the adjustingpart 50 of the first cutting-ingovernor motion 46, makespointer 58 indicate the scale corresponding with the thickness ofworkpiece 47.

Step S2: regulate the second cutting-ingovernor motion 70, make thecut edge 19 ofsaw blade 14 of portable circular saw 10 tangent with second surface 47a.The user observes the position relation ofsaw blade 14 andworkpiece 47, regulates the screw of the second cutting-ingovernor motion 70, makes that thecut edge 19 ofsaw blade 14 is tangent with thesecond surface 47a ofworkpiece 47, makessaw blade 14 cut offworkpiece 47 just.

Second embodiment of the invention provides a kind of portable circular saw, the functional structure of the portable circular saw 10 that described portable circular saw and first embodiment provide is basic identical, its difference branch is: see also Figure 10 and Figure 11, the second cutting-in governor motion 90 comprises thegear 92 that is arranged on theguard shield 16, by thetooth bar 94 ofgear 92 drivings, and the lockingmember 96 oflock gear 92 positions.

Gear 92 is rotating to be arranged on thelug boss 69 ofguard shield 16, and the transmittinggear 92 of user-operable is to regulate cutting-in.In the present embodiment, 92 one-tenth of gears are cylindric, circumferentially are first flank oftooth 98 along it, are locking face 100 with respect to two sections of the flank of tooth.The user moves by promoting first flank oftooth 98 with transmittinggear 92 and then driving tooth bar 94.When the user finishes the adjusting cutting-in bygear 92 after, cooperate with locking face 100 by lockingmember 96, realize the position oflock gear 92, make the second cutting-in governor motion 90 be locked in the cutting-in of regulating when finishing.

Tooth bar 94 lengthwises extend, and it has second flank oftooth 102 that is meshed with described first flank oftooth 98, make that drivingtooth bar 94 by intermeshing first flank oftooth 98 and second flank oftooth 102 whengear 92 rotates moves.Tooth bar 94 is abutment end along its longitudinally one end, the end face of described abutment end is confinedplanes 104, the second cutting-in governor motion 90 connects by the described stop surface of confinedplanes 104 and the first cutting-ingovernor motion 46, namely the cam surface withspanner 54 connects, realize by regulating the position oftooth bar 94, realize further regulating the described stop surface of portable circular saw and the distance between theabutment face 66, namely realize after the first cutting-ingovernor motion 46 is finished the adjusting cutting-in, further regulating by 90 pairs of cutting-ins of the second cutting-in governor motion.

Locking member 96 can lock gear 90 the position, gear 90 can't be rotated, and is meshing with each other by first flank of tooth 98 and second flank of tooth 102, realize that the position of tooth bar 94 is locked, make the second cutting-in governor motion 90 be locked in some predetermined cutting-ins.In the present embodiment, locking member 96 is a locking spanner, and it is rotating to be arranged on the lug boss 69 of guard shield 16, and has inclined-plane 106, locking member 96 can be exerted pressure to the locking face 100 of gear 92 by inclined-plane 106, realizes the position of lock gear 92.Preferably, locking member 96 has gear resettlement section 108, and this gear resettlement section 108 has two inclined-planes 106 relative and that cooperate with two locking faces 100 respectively.The exercisable rotation with respect to guard shield 16 of locking member 96 makes it have off-position and the inclined-plane 106 that inclined-plane 106 and locking face 100 be separated to discharge gear 92 to exert pressure with the locked position of locking gear 92 to locking face 100.When locking member 96 is in the off-position, the transmitting gear 92 of user-operable is to regulate cutting-in, when locking member 96 is in locked position, exert pressure to gear 92 by the inclined-plane, make that the position of gear 92 is locked so that the position of tooth bar 94 is locked, the position of the locking second cutting-in governor motion 90 of realization.

Certainly, lockingmember 96 can also be arranged to other structures, such as the resilient key that can exert pressure to locking face 100, perhaps lockingmember 96 does not arrangegear resettlement section 108 and an inclined-plane only is set exerts pressure to gear 92, again or realize the turning cylinder oflock gear 92 by other Machine Designs.Under the enlightenment of the technology of the present invention marrow, those skilled in the art also may make other changes, enumerate no longer one by one as space is limited 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.

The present invention is not limited to aforementioned embodiments, and those skilled in the art also may make other changes under the enlightenment of the technology of the present invention marrow, 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 (9)

1. a portable circular saw is used for cut workpiece, and it comprises:

The saw blade that is used for cut workpiece;

Housing;

Be housed in the motor that is used for driving described saw blade in the described housing;

Movably be installed on the guard shield on the described housing, described guard shield has the base plate against described workpiece, described base plate is provided with the saw blade through hole and therefrom passes for described saw blade, described guard shield moves between primary importance and the second place with respect to described housing, when described guard shield is positioned at described primary importance, described saw blade does not pass from described saw blade through hole, and when described guard shield was positioned at the described second place, described saw blade passed from described saw blade through hole;

Be used for the described relatively housing displacement of the described guard shield of backstop with the first cutting-in governor motion of the cutting-in of regulating described saw blade;

It is characterized in that:

Described portable circular saw also is included in the first cutting-in governor motion and is in when being scheduled to the cutting-in position, to the further second cutting-in governor motion of regulating of cutting-in.

2. portable circular saw according to claim 1, it is characterized in that: the described first cutting-in governor motion has the stop surface of the described guard shield of backstop, described base plate has the abutment face that contacts with described workpiece, the described second cutting-in governor motion can be regulated the distance between described stop surface and the described abutment face after the described first cutting-in governor motion is adjusted to predetermined cutting-in position.

3. portable circular saw according to claim 1, it is characterized in that: the described second cutting-in governor motion comprise be arranged on described guard shield or the described first cutting-in governor motion the two one of on screwed hole, and the screw that connects with described screwed hole phase screw thread, described screw can with described guard shield or the described first cutting-in governor motion another butt in the two.

4. portable circular saw according to claim 3, it is characterized in that: described screw comprises for the head that connects with the described first cutting-in governor motion or described guard shield, and with the afterbody that described screwed hole phase screw thread connects, be provided with flexible member between described head and described guard shield or the described first cutting-in governor motion.

5. portable circular saw according to claim 1, it is characterized in that: the described first cutting-in governor motion comprises the fluting that is arranged on the described housing, and the adjusting part that can slide in described fluting and can locate at an arbitrary position.

6. portable circular saw according to claim 1, it is characterized in that: the described second cutting-in governor motion comprise be arranged on described guard shield or the described first cutting-in governor motion the two one of on threaded post, and screw thread connects the nut on described threaded post, and described nut can another connects in the two with described guard shield or the described first cutting-in governor motion.

7. portable circular saw according to claim 1, it is characterized in that: the second cutting-in governor motion comprises the rotating gear that is arranged on the described guard shield, by described gear drive and the tooth bar that connects with the described first cutting-in governor motion, and the locking member that can lock the position of described gear.

8. portable circular saw according to claim 7, it is characterized in that: the flank of tooth that described gear has locking face and cooperates with described tooth bar, described locking member is the locking spanner with inclined-plane, and described locking member is exercisable to be in by described inclined-plane and to exert pressure to lock the locked position of described gear to described locking face, or the off-position of separating with described locking face, described inclined-plane.

9. the cutting-in control method of a portable circular saw, the workpiece that is used for the cutting predetermined thickness, described workpiece has towards the first surface of described portable circular saw with back to the second surface of described portable circular saw, described portable circular saw has cutting-in is carried out the first cutting-in governor motion of coarse adjustment and the second cutting-in governor motion that cutting-in is carried out fine tuning, and described cutting-in control method comprises:

Regulate the first cutting-in governor motion, cutting-in is adjusted to the scale corresponding with the thickness of described workpiece;

Regulate the second cutting-in governor motion, make cut edge and the described second surface of saw blade of described portable circular saw tangent.

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