The content of the invention
The purpose of the application is to solve the above-mentioned problems in the prior art.Specifically, the application aims to provide oneAnnular saw is planted, its saw blade adjusting means can avoid fastener during saw blade inclination sawing from encountering workpiece surface, while ensuring that saw blade hangs downMaximum sawing depth when rip is cut is unaffected.
Therefore, this application provides a kind of annular saw, it includes：Pedestal；Rotatable saw blade；And saw blade adjusting means,Its saw blade adjusting bracket for including being fixed on the front and rear bearing on pedestal and carry the saw blade, the front and rear bearing is respectively equipped withGuide groove, the saw blade adjusting bracket can slide to cause provided with the guide pillar in insertion respective guide slots, the guide pillar along the guide grooveSaw blade can be around a longitudinal pivot axis in the vertical sawing position perpendicular to the pedestal and relative to basement tilt maximumPivoted between the maximum inclination sawing position of angle；Wherein, each guide groove is designed such that, in saw blade from the vertical sawing positionPut during being pivoted to the inclination sawing position, the increase of the distance between saw blade center and longitudinal pivot axis.
According to the embodiments possible of the application, the saw blade track that wherein the heart channel of Hang-Shaoyin is crossed in pivoting, which is limited to, to be corresponded toThe starting point of the vertical sawing position and corresponding between the terminal of the maximum inclination sawing position, the starting point is located at instituteState longitudinal pivot axis be the center of circle, to be in vertical sawing position when the distance between saw blade center and longitudinal pivot axis be halfOn the basic circle in footpath, the terminal is located at the radial outside of the basic circle.
According to the embodiments possible of the application, prolong with the track at saw blade center from the starting point towards the terminalStretch, the distance between saw blade center and described longitudinal pivot axis gradually increase.
According to the embodiments possible of the application, the track at saw blade center is included on the basic circle from starting point extensionThe second segment of the terminal is extended to from the intermediate point to the first paragraph of an intermediate point and in the basic circle radial outside.
According to the embodiments possible of the application, the guide groove at least one bearing in the front and rear bearing includes differenceThe radial outside guide groove and radially inner side guide groove inserted by corresponding guide pillar.
According to the embodiments possible of the application, the guide groove at least one bearing in the front and rear bearing is singleGuide groove, the saw blade adjusting bracket is provided with corresponding two guide pillars being inserted in the single guide groove.
According to the embodiments possible of the application, longitudinal pivot axis separates one jiao described in the spaced winding of described two guide pillarsDegree, the angle is more than or equal to 45 degree.
According to the embodiments possible of the application, the guide pillar is configured to the form of roller.
According to the embodiments possible of the application, the saw blade adjusting bracket include the fore-end coordinated with preceding bearing and withThe rear end part that fore-end is connected and coordinated with rear support.
According to the embodiments possible of the application, the saw blade adjusting bracket also includes being formed the depth on end part in the rearSpend adjustable plate.
According to the embodiments possible of the application, longitudinal pivot axis plane and pedestal lower surface where the saw bladeBetween intersection limit.
According to the embodiments possible of the application, longitudinal pivot axis is by plane where saw blade and positioned at pedestal following tableIntersection below face and between the plane parallel with pedestal lower surface is limited.
According to the embodiments possible of the application, the annular saw also includes guide rail, and the bearing is rested on the guide rail,The lower surface of the guide rail limits described be located at below pedestal lower surface and the plane parallel with pedestal lower surface.
According to the embodiments possible of the application, each guide groove is designed such that, in saw blade pivoting, the longitudinal directionThe position of pivot axis keeps substantially constant.
According to the embodiments possible of the application, the saw blade has the upper portion being located above the pedestal and is located atLower portion below the pedestal；The annular saw also includes the shield for covering saw blade upper portion, the saw blade adjusting meansThe saw blade is carry by the shield.
According to the annular saw of the application with saw blade adjusting means by making saw blade be risen during being pivoted relative to working faceIt is high and avoid blade lock from encountering workpiece surface or guide rail.Meanwhile, maximum sawing depth during the upright position of saw blade not byInfluence.Therefore, the application provides a kind of selection being highly profitable for user.
Embodiment
The annular saw of embodiments possible according to the application is described with reference to the accompanying drawings.
Annular saw involved by the application can carry out sawing to various workpiece.Here, " workpiece " refers to any block or plateShape can sawing material, such as timber, plastics, glass, metal etc..
As shown in figure 4, the annular saw of example includes pedestal 5, it is preferably made up of robust material such as metal.In figureShown in embodiment in, pedestal 5 be generally rectangular plate form, the lower surface with general planar.Certainly, other shapesPedestal be also feasible.In rail type annular saw, pedestal 5 is arranged on guide rail.
Pedestal 5 or guide rail（If any）Basal surface limit working face 6, the working face 6 is in annular saw sawing operationIn against on the surface of the workpiece.
Annular saw also includes motor cover 12 and the shield 14 in motor cover 12.Drive motor is housed in motor cover 12（It is not shown）.
Annular saw also includes directly or indirectly being drive the saw blade for rotating and making sawing motion around transverse rotation axis by motor1, it is fastened on unshowned drive shaft by outside fastener such as packing ring 2 and trip bolt 3（Such as motor drive shaft）On, andAnd can be rotated around its center axis.At this point, it may be noted that outside is the side back to motor of referred to as saw blade 1, inner side isThe side towards motor of referred to as saw blade 1.
A part for the bottom of saw blade 1 passes through the opening in pedestal 5 and exposed from the basal surface of pedestal, to cut workpieceIn.
Annular saw also includes the bottom auxiliary shield 15 for covering the bottom of saw blade 1, and it can be rolled in shield 14 and be keptWherein, so as to expose the bottom of saw blade 1.
Referring to Fig. 5, annular saw also includes saw blade adjusting means, for adjusting angle and height of the saw blade 1 relative to pedestal 5,Thereby determine that the saw cutting angle and depth of saw blade 1.The saw blade adjusting means mainly includes the He of preceding bearing 16 being fixed on pedestal 5Rear support 18, and the saw blade adjusting bracket 20 and can pivoted around longitudinal pivot axis 8 by front and rear bearing support.This is longitudinally pivotedAxis 8 is substantially by the place plane of saw blade 1（Such as saw blade outer surface, inner surface or midplane between surfaces externally and internally）WithThe intersection of working face 6 is limited, and is kept essentially constant at saw blade 1 in the different angles relative to working face 6.
Preceding bearing 16 and rear support 18 are generally made up of plastics or metal.The saw blade adjusting bracket 20 generally by metal for exampleCast aluminium is made, including the rear end part for the fore-end 22 coordinated with preceding bearing 16 and for coordinating with rear support 1824.Fore-end 22 can be joined directly together with rear end part 24, or connected by center section 26 as shown in Figure 9.In thisBetween part 26 can form one with fore-end 22 and rear end part 24, or independently form then with fore-end 22 and afterEnd part 24 fits together to enable fore-end 22 and rear end part 24 around longitudinal pivot in unison of pivot axis 8.
In addition, provided with for by the fore-end 22 of saw blade adjusting bracket 20 relative to the cage knob 32 that preceding bearing 16 is locked（Such asShown in Fig. 4）And/or for by the rear end part 24 of saw blade adjusting bracket 20 relative to the cage knob that rear support 18 is locked（Do not showGo out）.
The fore-end 22 of saw blade adjusting bracket 20 is provided with transverse support portion 34, the transverse support portion 34 and is formed with transverse holes36, for installing transverse pivot 38（See Fig. 4）.In addition, saw blade adjusting bracket 20 is in the close center section 26 of rear end part 24Position be provided with the generally arcuate depth-regulating plate 40 of upward projection, define arc guide barrel 42 in the depth-regulating plate 40,For by depth locking lever（It is not shown）Pass through.In addition, being formed with the depth-regulating plate 40 for indicating saw blade sawing depthPointer portion 44.
Shield 14 passes through transverse pivot 38 in its front end（See Fig. 4）And saw blade adjusting bracket 20 is connected to, this is laterally pivotedAxle 38 limits transverse pivot line, and the transverse pivot line is parallel to working face 6 and perpendicular to longitudinal pivot axis8.The center of circle of depth-regulating plate 40 and its arc guide barrel 42 is located on transverse pivot line.The rear side of shield 14 can be along depthAdjustable plate 40 is slided and can locked by the depth locking lever relative to depth-regulating plate 40.
By the way that shield 14 is pivoted around the transverse pivot line that transverse pivot 38 is limited relative to pedestal 5, it can adjustSawing depth in the incision workpiece of saw blade 1；Then, shield 14 is locked on depth-regulating plate 40 using depth locking lever, saw bladeSawing depth be just fixed.
Generally, saw blade perpendicular to pedestal 5, i.e. saw blade perpendicular to workpiece surface sawing workpieces.It is sometimes desirable, however, that saw blade phaseFor working face 6 it is at an angle tilt sawing workpieces, now can by by saw blade adjusting bracket 20 with saw blade 1 around it is longitudinal pivotAxis 8 is pivoted relative to pedestal 5, to adjust the angle of inclination relative to working face 6 of saw blade 1.Saw blade 1 is from its upright positionPivot the part that it is located above longitudinal pivot axis to move laterally, the part below longitudinal pivot axis is insideMove side.Then, saw blade adjusting bracket 20 is locked relative to preceding bearing 16 and/or rear support 18 using cage knob 32, thereby determined thatAngle of inclination of the saw blade relative to working face 6.
Part of the saw blade adjusting means at its preceding bearing in a kind of traditional annular saw is shown in Fig. 6.Shown in Fig. 6It is that side of the facing fore-end 22 of preceding bearing 16.The pedestal 5 of annular saw is arranged on guide rail 46, the lower surface of guide rail 46Limit working face 6.Annular saw is rested at working face 6 on the upper surface of workpiece 48.Two circular arcs are formed with preceding bearing 16Shape guide groove 50, the center of circle of the two is located on longitudinal pivot axis 8.The fore-end of saw blade adjusting bracket 20（Not shown in Fig. 6）ShapeInto having in insertion guide groove 50 respectively and the circular arc guide block that can be slided along direction shown in the arrow in Fig. 6 in respective guide slots 5052.In addition, the locking bar 56 being also formed with preceding bearing 16 on the arc chute 54 concentric with guide groove 50, cage knob 32 passes through chute54 and it can slide wherein.Although not shown, it will be understood that be provided with same or analogous guide block and guide groove at rear support 18.So, form what guiding saw blade adjusting bracket was pivoted relative to front and rear bearing around longitudinal pivot axis by above-mentioned guide block and guide grooveGuide frame.
As it was previously stated, this structure is difficult to avoid on the premise of the maximum sawing depth when not sacrificing the vertical sawing of saw bladeFastener encounters workpiece surface or guide rail when saw blade tilts sawing.
The basic conception of the application is, in the tilting procedure of saw blade so that saw blade rises a small distance.Show in Fig. 7Improvements of the application relative to prior art are shown.Left part in Fig. 7 shows saw blade 1 in prior art annular sawTilting procedure, also sees and Fig. 3.When saw blade 1 relative to working face 6 is tilted up to certain angle（Such as 45 degree）When, the He of packing ring 2Fastener encounters workpiece surface or guide rail on the outside of the grade of trip bolt 3.Left part in Fig. 7 shows the annular saw according to the applicationThe tilting procedure of middle saw blade 1, wherein, in saw blade 1 by during inclined relative to working face 6, saw blade 1 is elevated.So, whenSaw blade 1 tilts certain angle relative to working face 6（Such as 45 degree）When, saw blade 1 has been elevated a segment distance relative to working face 6H, the distance make it that under equal angular fastener does not encounter workpiece surface or guide rail on the outside of packing ring 2 and the grade of trip bolt 3.
In order to realize this function of raising it in the tilting procedure of saw blade 1, the application is to saw blade adjusting meansSaw blade adjusting bracket 20, preceding bearing 16, rear support 18 are made that improvement.Structure before in Fig. 8 at bearing 16 shows this changeEnter.It is appreciated that having carried out same or analogous improvement at rear support 18.
According to a kind of embodiments possible of the application, as shown in figure 8, longitudinal pivot axis 8 is located substantially at guide rail 46In the working face 6 that lower surface is limited.It is formed with preceding bearing 16 and is formed with corresponding a pair in a pair of guide grooves 50, rear support 18 and leadsGroove（It is not shown）.Meanwhile, referring to Fig. 8 and combine Fig. 9, the fore-end 22 of saw blade adjusting bracket 20 is formed with insert respectively before bearingIn 16 guide groove 50 and a pair of substantial cylindrical guide pillars 60 being slided in guide groove 50.Similarly, as shown in Figure 10, saw bladeThe rear end part 24 of adjusting bracket 20 is formed with can slide in the respective guide slots of insertion rear support 18 respectively and in guide groove oneTo substantial cylindrical guide pillar 60.
The track of each guide groove 50 extends to set distal point from starting point, and the track includes saw blade and is inThe first point 50a during upright position where corresponding guide pillar 60（See Figure 12,13）Accordingly led when being in maximum tilt angle with saw bladeSecond point 50b where post 60（See Figure 12,13）.First point 50a and second point 50b can be located between starting point and distal point（Such case not shown in figure）, or can be overlapped respectively with starting point and distal point（Situation as shown in Figure 12,13）.
Difference from prior art is, the track of each guide groove 50 is not using the point on longitudinal pivot axis 8 inThe heart, but with extending from the first point 50a to second point 50b, the distance between each guide groove 50 and longitudinal pivot axis 8 increaseGreatly, with cause the second distance between second point 50b in the track of guide groove 50 and longitudinal pivot axis 8 be more than the first point 50a withThe first distance between longitudinal pivot axis 8.
By the slip in guide groove of the guide pillar 60 of front side and rear side in front and rear bearing, the inclination and lift of saw blade 1 are realizedIt is high.So, above-mentioned guide pillar and guide groove constitute guiding saw blade adjusting bracket 20 and pivoted relative to front and rear bearing around longitudinal pivot axisAnd the guide frame raised relative to front and rear bearing.
The through hole 62 being respectively formed in front and rear bearing is also show in Fig. 9,10, for being worn by the locking bar on corresponding cage knobCross.Have respectively in addition, fore-end 22 is formed with a pair of transverse support portions 34 relative to each other, each transverse support portion 34Transverse holes 36, for improve support strength, to install transverse pivot 38.
It may be noted that formed respectively on preceding bearing 16 and rear support 18 two guide pillars 60 be in order that shield 14 it is relativeThere is higher positioning precision in pedestal 5.In fact, in the case where disclosure satisfy that the positioning precision of shield 14, can be precedingUpper formed on two guide pillars 60, another in front and rear bearing of one of rear support only forms a guide pillar 60（Corresponding bearingIn only form a corresponding guide groove）.
In addition, the slip for the ease of guide pillar in guide groove, guide pillar can be configured to roller or other knots for being easy to rollStructure.
According to another embodiments possible of the application, can before and after at least one in bearing can only form oneTwo guide pillars in guide groove, the respective front ends or rear end part of saw blade adjusting bracket 20 are inserted in the guide groove.For example, referring to Figure 11,Preceding bearing 16（Not shown in Figure 11）In be formed with single guide groove 50, the fore-end 22 of saw blade adjusting bracket 20 formed twoGuide pillar 60, the two is all inserted into the guide groove 50 and slided in it.It is appreciated that the rear end of rear support 18 and saw blade adjusting bracket 20Part 24 can have similar guide frame.In order to ensure saw blade adjusting bracket 20 is reliably rotated relative to preceding bearing 16, twoThe longitudinal pivot axis 8 of the spaced winding of individual guide pillar 60 separates an angle, θ.The angle, θ is change in saw blade tilting procedure, but preferablyAlways greater than or equal to 45 degree.In other words, seen along the direction of longitudinal pivot axis 8, the center of two guide pillars 60 and longitudinal pivotThe angle, θ formed between line between shaft axis 8 is preferably greater than or equal to 45 degree.
Guide frame for being inserted with two guide pillars 60 in a this guide groove 50, equally, for each guide pillar 60, itsFirst point when saw blade is in vertical position in the track of guide groove 50, when saw blade is in maximum tilt angle be located at guide groove 50Second point in track, the second distance between second point and longitudinal pivot axis 8 be more than first point with longitudinal pivot axis 8 itBetween the first distance.
It is appreciated that the guide frame shown in Figure 11 can be combined and/or mutual with the guide frame shown in Fig. 8-10Change and use.
On the setting of guide groove 50, as it was previously stated, it is required that, with extending from the first point 50a to second point 50b, leadThe distance between groove 50 and longitudinal pivot axis 8（The vertical range of point i.e. on guide groove 50 to longitudinal pivot axis 8）Increase, fromAnd the second distance between the second point 50b of guide groove 50 and longitudinal pivot axis 8 is more than its first point 50a and longitudinal pivot axisThe first distance between 8.First distance can progressively increase to second distance, can also increase in the way of rank becomes second away fromFrom.Furthermore, it is possible to since first point or close to increase the point after first point between guide groove 50 and longitudinal pivot axis 8 away fromFrom the distance can also be increased at some between the first point 50a and second point 50b or some positions.No matter which kind of situation,Guide groove 50 is increase with the distance between longitudinal pivot axis 8 along the first point 50a to second point 50b, to ensure saw blade 1 in pivotIt will not decline during turning.Herein, the increase can not have rule, can also be mutated increase.
Even if in addition, the distance is that staged is increased, it is also preferred that so that having between guide groove 50 and longitudinal pivot axis 8Have between each section of different distance and seamlessly transit, in order to pivot action.
A kind of feasible trajectory of guide groove 50 is shown in Figure 12, wherein, two guide grooves 50 on same bearing are illustrated, oftenIndividual guide groove 50 is gradually deviated from the corresponding imaginary circle using the point on longitudinal pivot axis 8 as the center of circle with away from its first point 50a（It is not shown）, so that gradually the distance between increase and longitudinal pivot axis 8.In addition, the track of two guide grooves 50 is associated with each otherGround is set, and to cause the distance between position that two guide pillars 60 occupy in two guide grooves 50 respectively to keep constant, saw blade is adjustedSave the smooth sliding of frame 20.
According to the Trajectory Design mode of previously described guide groove 50, in saw blade 1 around longitudinal pivot axis 8 relative to pedestal 5Pivot（Tilt）During, the track at the center of saw blade 1 do not have any part fall with longitudinal pivot axis 8 for the center of circle, withThe distance between the center of saw blade 1 when being in vertical sawing position and longitudinal pivot axis 8 are the inner side of the basic circle 64 of radius.In the example shown in Figure 12, the track at the center of saw blade 1 is from the starting point 66a on the basic circle 64（Corresponding to guide groove 50First point 50a）Start, gradually outwardly away from the basic circle 64, finally reach home 66b（Corresponding to the second point 50b of guide groove 50）.Another feasible trajectory of guide groove 50 is shown in Figure 13, wherein, each guide groove 50 its first point 50a and second point 50b itBetween intermediate point 50c sentence the mode of rank change and deviate corresponding imaginary circle using the point on longitudinal pivot axis 8 as the center of circle so that fromIntermediate point 50c the distance between starts to increase in the way of rank becomes with longitudinal pivot axis 8.Correspondingly, in saw blade 1The track of the heart is from the starting point 66a on the basic circle 64（Corresponding to the first point 50a of guide groove 50）Start, along the basic circleThe 64 intermediate point 66c extended on the basic circle 64（Corresponding to the intermediate point 50c of guide groove 50）.Then, from intermediate point 66cStart in the way of rank becomes to deviate to the outside of the basic circle 64.Then, the track at the center of saw blade 1 is tapered to positioned at instituteState the terminal 66b in the outside of basic circle 64（Corresponding to the second point 50b of guide groove 50）.So, the track at the center of saw blade 1 includes being located atFirst paragraph on the basic circle 64, the second segment positioned at the outside of basic circle 64 and the transition between first paragraph and second segmentSection.The second segment can be the arc section concentric with the basic circle 64, can also gradually further out lateral deviation from the basic circle64。
It is appreciated that the thought based on the application, those skilled in the art can design various suitable rails for guide grooveMark, to cause the center of saw blade that there is the track outwardly away from the basic circle, the i.e. terminal of the track at saw blade center to be indulged with describedIt is more than the distance between starting point and longitudinal pivot axis to the distance between pivot axis, so that saw blade is relative to workFace is pivoted（Tilt）When be elevated.In addition, guide groove is preferably designed to, and in saw blade pivoting, longitudinal pivot axisPosition keep it is substantially constant.Specific guide groove Trajectory Design can be realized by modes such as calculating, simulations.For example, givenThe track at saw blade center, it may be determined that go out the track of guide groove.
It can be seen that, in the annular saw according to the application, saw blade adjusting means employs the guide pillar of uniqueness and guide groove matchesThe guide frame of conjunction, to cause saw blade to be raised during pivot is tilted relative to working face, to avoid blade lockEncounter workpiece surface or guide rail.Meanwhile, when saw blade is in perpendicular to the position of working face, the maximum sawing depth of saw blade not byInfluence.
Although describing the application herein with reference to specific embodiment, scope of the present application is not limited to shownDetails.In the case of the general principle without departing from the application, various modifications can be made for these details.