CN109865885A - A kind of reciprocal cutting tool - Google Patents

Abstract

The present invention relates to a kind of reciprocal cutting tools comprising: shell；Motor in shell；Reciprocator in shell, the reciprocator include the reciprocating lever moved back and forth relative to shell along axis X by motor driving and the saw blade being connected with reciprocating lever；Cutter lifting component in shell；Transmission parts between the cutter lifting component and the reciprocator；The cutter lifting component drives the transmission parts to oppress the saw blade to saw blade cut direction；The cutter lifting component includes the cutter lifting plate for being driven by a motor the connecting plate relative to shell movement and being movably connected on the connecting plate.

Description

A kind of reciprocal cutting tool

Technical field

The present invention relates to a kind of reciprocal cutting tools.It is reciprocal more particularly to a kind of one kind of cutter lifting component with optimization Cutting tool.

Background technique

As a kind of power tool, a kind of reciprocal cutting tool is widely used, and those skilled in the art are very familiar with, Including shell, it is mounted on the intracorporal motor of shell, and is driven by a motor, is moved back and forth relative to shell to cut the saw of workpiece Item.Sweep-saw, reciprocating saw etc. belong to reciprocal cutting tool.

Many sweep-saws have the function of cutter lifting, due to the cutter lifting power for being driven it to swing by one, jigsaw blade It can slightly be swung on a direction perpendicular to its reciprocating cutting.Due to having given the power of one, saw blade direction workpiece, cutter lifting function It can significantly promote cutting efficiency.Partial trace saw also has saw blade rotation function simultaneously, and this function allows saw blade phase Shell is rotated.In the case where working space is narrow or the limited in rotation of sweep-saw itself, the benefit of this function is bright Aobvious.

Since saw blade will receive biggish cutting force when cutting.It is generally necessary to which guide wheel supports saw blade, together When, cutter lifting power can also be transferred to saw blade by guide wheel.Guide wheel is fixed on the shell or bottom plate of sweep-saw in the prior art. It has guide wheel at present and the rotatable sweep-saw of saw blade all has at least two gears, in a gear, guide wheel supports saw blade, but Saw blade cannot be rotated by guide wheel limitation；Guide wheel is needed to remove in another gear, saw blade can just rotate, Patent No. The Chinese invention patent of CN2717591Y discloses this technology.

Meanwhile on compact-sized sweep-saw, guide wheel pull-off saw blade can be faced into such a problem, the lift of sweep-saw Cutter mechanism will limit the scope of activities of the wheel bracket of installation guide wheel.

It is therefore desirable to have a kind of sweep-saw, can overcome the lifter of sweep-saw to the limit of wheel bracket scope of activities The problem of processed.

Summary of the invention

The purpose of the present invention is to provide a kind of one kind of cutter lifting component for having the function of to optimize for blade support is reciprocal Cutting tool, especially a kind of sweep-saw.

The present invention provides a kind of reciprocating cutting tools comprising:

Shell；Motor in shell；Reciprocator in shell, the reciprocator include being driven by motor The reciprocating lever moved back and forth relative to shell along axis X and the saw blade being connected with reciprocating lever；Cutter lifting component in shell；If Transmission parts between the cutter lifting component and the reciprocator；The cutter lifting component drives the transmission parts to saw blade Cut direction oppresses the saw blade；The cutter lifting component includes being driven by a motor to connect relative to the connecting plate of shell movement and activity Connect the cutter lifting plate on the connecting plate.

Further, the transmission parts include wheel bracket and the guide wheel that is mounted on wheel bracket, the guide wheel branch Frame is pivotably mounted on shell, the branch with a pivotal axis and the adjoining cutter lifting plate for being located at pivotal axis two sides The bracket bottom end on frame top and the adjacent saw blade, the bracket bottom end connect the guide wheel.The wheel bracket and shell it Between be equipped with bracket torsion spring, bracket torsion spring compressing wheel bracket pivots, and makes cantilever tip close to the cutter lifting plate, bracket bottom end With guide wheel far from the saw blade.

Further, the connecting plate is moved back and forth by the motor drives edge X-axis.Described in the cutter lifting plate is pivotally connected Connecting plate.The cutter lifting plate includes cutter lifting end and the cutter lifting plate side perpendicular to the cutter lifting end, the cutter lifting plate connection Cutter lifting plate torsional spring, the cutter lifting plate torsional spring compressing cutter lifting end and the connecting plate are located on same axis.

Further, including the operating element being arranged on shell, the operating element is connected with driving lever, the operation member Cutter lifting end is moved to by part selectivity by driving lever from the Support Position being located at and the connecting plate is on same axis The releasing position for being less than the angle of 180 degree is formed between cutter lifting end and connecting plate.The operating element is connected with cam, The cam, which has, pivots axle center and high plane and low level face on cam periphery, the high plane to cam pivots axle center Distance be greater than the distance that cam pivots axle center is arrived in the low level face, the operating element drive cam pivots about axle center It pivots, selective makes high plane and low level face towards the cantilever tip, convex when the high plane is towards the cantilever tip Wheel compressing guide wheel contacts the saw blade；When the low level face is towards the cantilever tip, bracket torsion spring oppresses the cantilever tip It is pivoted towards the low level face, guide wheel leaves saw blade.

Further, when the cutter lifting plate is located at Support Position, the cutter lifting end is driven by the connecting plate in axis X It is moved back and forth between an extreme higher position and an extreme lower position on line, there is the cam distance pivot axle center distance successively to pass The three high planes increased when three high planes are towards wheel bracket, are located at the highest order of cutter lifting end on axis X direction It sets between extreme lower position.

Further, when the cutter lifting end is toggled it to releasing position by the operating element, the cam pivots are driven, Make its low level face in face of cantilever tip.

Further, the rotating handle including being rotated for controlling reciprocating lever around axis X；Operation member on shell is set Part, the operating element connect rotation locking elements, and operable reciprocal from the fixation position that limitation reciprocating lever rotates to allowing The mobile rotation locking elements in the rotation position of bar rotation.The rotation locking elements be installation in the housing, with gear match The rack gear along the setting of axis X direction connect, the rotating handle are equipped with occlusion portion, the shape of the end of the rack gear and described The occlusion portion shape of rotating handle matches；The operating element connection can be relative to the gear and operable drive that shell pivots Gear pivots, and then moves with carry-over bar along axis X direction, is engaged the occlusion portion of the rotating handle.The rotating handle rotation When going to the position of cut surface face housing longitudinal axis line Y of saw blade, the occlusion portion and the rack gear are located along the same line.

The configuration of the present invention is simple is compact, the occasion that rotary mode etc. does not need support function can be convenient by guide wheel from It is removed on saw blade, swift to operate, usage mode is flexible.

Detailed description of the invention

Fig. 1 is the cross-sectional view of sweep-saw main view direction of the invention.

Fig. 2 is the main view of sweep-saw of the invention.

Fig. 3 is cutter lifting of the invention, the structural schematic diagram of rotation and guide wheel position-limit mechanism.

Fig. 4 is the stereoscopic schematic diagram of rotating mechanism of the invention.

Fig. 5 is the stereoscopic schematic diagram of cutter lifting component of the invention.

Fig. 6 is the stereoscopic schematic diagram of cam of the invention.

Fig. 7 is the stereoscopic schematic diagram of wheel bracket of the invention.

Fig. 8 a is 0 grade of cutter lifting of status architecture schematic diagram of the invention.

Fig. 8 b is I grades of cutter lifting of status architecture schematic diagram of the invention.

Fig. 8 c is II grades of cutter lifting of status architecture schematic diagram of the invention.

Fig. 8 d is III grades of cutter lifting of status architecture schematic diagram of the invention.

Fig. 8 e is the status architecture schematic diagram of S grades of rotation of the invention.

Wherein,

Specific embodiment

A kind of preferred embodiment of reciprocal cutting tool of the invention is a kind of sweep-saw.As shown in Figure 1, the present embodiment The left side of sweep-saw 1 is defined as the rear of sweep-saw 1, and right side is defined as front, and upside is defined as top, and downside is defined as down Side.Sweep-saw 1 has the axis of reciprocation X that vertically extends and the housing longitudinal axis line Y extended along the longitudinal direction, axis X with Axis Y is mutually perpendicular to.

Such as Fig. 1, sweep-saw 1 includes a shell 2, is fixedly installed a power source in shell 2, excellent in the present embodiment It is selected as motor 4, motor 4 connects and rotate driving spindle 104, and one end of main shaft 104 connects motor 4, and the other end forms gear, should Gear engages mating with the outer peripheral surface of gear wheel 106.The gear wheel 106 is driven by main shaft 104, pivots around itself pivotal axis. One drive shaft 108 of eccentric setting on the front end face of gear wheel 106, the drive shaft 108 are deep into sliding slot 110.Sliding slot 110 is fixed It is connected on reciprocating lever 12, and extends along both perpendicular to the direction of axis X and axis Y.Reciprocating lever 12 is in axis X and axis It is moved in Y-direction, perpendicular to being fixed on the direction of axis X and axis Y.In this way, the rotary motion of motor 4 passes through master Axis 104, gear wheel 106, drive shaft 108 are converted into the reciprocating motion of sliding slot 110 and reciprocating lever 12 on axis X direction.Back and forth The saw blade 14 that end thereunder is arranged in bar 12 and then drive carries out reciprocating cutting movement.There is saw blade 14 one to be located at front Cut surface and the back side being located behind.Reciprocating lever 12 and saw blade 14 are combined, referred to as reciprocator.Gear wheel 106 Rear end face on eccentric setting have a cutter lifting drive shaft 302, the eccentric direction of cutter lifting drive shaft 302 and the bias side of drive shaft 108 To opposite.Cutter lifting drive shaft 302 connects a connecting plate 304 and it is driven to move back and forth along the x axis.It is formed above shell 2 One handle 6, handle 6 are equipped with the switch 8 of control motor 4.The upper front of the shell 2 of sweep-saw 1 is equipped with rotating handle 202, Rotating handle 202 can be pivoted relative to shell around axis X, and rotating handle 202 connects reciprocating lever 12, and rotation drives reciprocating lever 12 It is rotated with saw blade 14 around axis X.

Pivotable on the shell 2 of sweep-saw 1 to be connected with an operating element 402 such as Fig. 2, operating element 402 can Effective controlling curve saw 1 is located at 5 gears, and conversion is rotated between five gears, this five gears respectively correspond sweep-saw 1 Five kinds of working conditions, they are successively: 0 grade of cutter lifting (0 position of diagram) as shown in Figure 8 a, sweep-saw 1 cannot at this time Rotation, also cannot cutter lifting；I grades of cutter lifting (position I of diagram) as shown in Figure 8 b, sweep-saw 1 cannot rotate at this time, cutter lifting Amount is minimum；II grades of cutter lifting (position II of diagram) as shown in Figure 8 c, sweep-saw 1 cannot rotate at this time, and cutter lifting amount size occupies In；III grades of cutter lifting (position III of diagram) as shown in figure 8d, sweep-saw 1 cannot rotate at this time, and cutter lifting amount is maximum；Such as figure S grades (S location of diagram) is rotated shown in 8e, sweep-saw 1 can rotate at this time, it is not possible to cutter lifting.Wherein, operating element switches To 0 grade of cutter lifting, I grades of cutter lifting, sweep-saw 1 is switched to again all in a kind of cutter lifting support modes when II grades of cutter lifting, III grades of cutter lifting S grades of sweep-saws 1 of rotation are in rotary mode.Its implementation and function and effect specifically describe below.

Such as Fig. 3, Fig. 4, casing 204 is extended in the lower section of rotating handle 202, and the bottom of casing 204 is equipped with by a deep square Shape hole 221 and the overlapping cross bore 205 along the setting of axis X direction formed of a shallow rectangular opening 222.The lower section of casing 204 is set There is the bearing bracket stand 206 (referring to Fig.1) being set on shell 2, a ball bearing 208 is installed on bearing bracket stand 206, ball bearing 208 is suitable It is suitable on bearing bracket stand 206 to all directions and rotates.Ball bearing 208 has the through-hole 203 of a rectangle, the two sides of through-hole 203 It upwardly extends to form two symmetrical rectangular cams 210, the upper end of reciprocating lever 12 is equipped with rectangular end 13, and the rectangular end 13 setting exists In the through-hole 203 of ball bearing 208.221 part of deep rectangular opening of cross bore 205 above-mentioned accommodates the rectangular end of 12 top of reciprocating lever 13,222 part of shallow rectangular opening of cross bore 205 accommodates two bearing convex blocks 210 of the top of ball bearing 208.Deep rectangular opening 221 It is reciprocal along axis X to accommodate the rectangular end 13 of the reciprocating lever being threaded through in ball bearing 208 12 and its top with enough length It is mobile, but it is not allowed to rotate relative to ball bearing 208 around axis X.And deep 221 partial width of rectangular opening is slightly larger than reciprocating lever 12 rectangular end 13 allows to saw to allow reciprocating lever 12 and ball bearing 208 slightly to swing along on the direction perpendicular to axis X Item 14 carries out cutter lifting movement.

When rotating handle 202 pivots, the cross bore 205 of casing 204 and sleeve bottom is driven pivot, is arranged in cross Ball bearing 208 in hole 205 and bearing convex block 210 thereon and reciprocating lever 12 and its rectangular end 13 are driven around axis X simultaneously Rotation, in turn, ball bearing 208 and reciprocating lever 12 and saw blade 14 thereon also rotate with.

When operating element 402 rotates any gear switched in 0 grade of cutter lifting, I grades of cutter lifting, II grades of cutter lifting, III grades of cutter lifting When, sweep-saw 1 is located at support cutter lifting mode, and reciprocating lever 12 and saw blade 14 can be reciprocal perpendicular to saw blade 12 in this mode By cutter lifting active force on direction.As elucidated before, casing 204 and ball bearing 208 allow this cutter lifting to act.

As shown in figs. 3 and 5, the cutter lifting component 303 being equipped in shell 2, cutter lifting component 303 include being arranged along axis X direction Connecting plate 304 and cutter lifting plate 308, cutter lifting plate 308 is pivotally connected by a pin shaft and connecting plate 304, and connecting plate 304 has one A upper end and a lower end, the upper end are equipped with a cutter lifting slot 306 perpendicular to axis X direction, the pivotable connection one in lower end A guide wheel position-limit mechanism, guide wheel position-limit mechanism is while playing the role of the cutter lifting plate 308 of cutter lifting, cutter lifting plate in the present embodiment 308 have a cutter lifting end 310 and a cutter lifting plate side 312 perpendicular to the cutter lifting end 310, on cutter lifting plate 308 Equipped with a cutter lifting plate torsional spring 309, the cutter lifting plate torsional spring 309 oppresses the cutter lifting end 310 and is maintained at same with connecting plate 304 On one axis.

As shown in figs. 3 and 5, the rear end face of gear wheel 106 is provided with an eccentric cutter lifting drive shaft 302, cutter lifting driving Axis 302 is threaded through in the cutter lifting slot 306 of connecting plate 304, and the connecting plate 304 and cutter lifting plate 308 can be driven back and forth to transport along axis X It is dynamic.

As shown in Fig. 3, Fig. 7, wheel bracket 314 that the lower end of cutter lifting plate 308 is provided with.Wheel bracket 314 passes through one It is pivotally arranged at pivotal axis 317 on shell 2 to connect with shell, wheel bracket 314 further includes being located at 317 liang of pivotal axis The cantilever tip 315 of side and bracket bottom end 320.Cantilever tip 315 has a plane, is equipped with guide wheel on bracket bottom end 320 316, guide wheel 316 is located substantially at the rear of saw blade 14.Wheel bracket 314 and guide wheel 316 are combined, referred to as transmission parts. A bracket torsion spring 318 is provided on wheel bracket 314, which oppresses cantilever tip 315 close to cutter lifting plate 308 Cutter lifting end 310, bracket bottom end 320 and guide wheel 318 are far from saw blade 14.

As shown in figure 3, saw blade 14 is driven when cutter lifting drive shaft 302 (referring to Fig. 1) drives connecting plate 304 to move downward Moving axis 108 is driven by reciprocating lever 12 carries out cutting action upwards, and connecting plate 304 drives cutter lifting plate 308 and its cutter lifting end 310 move downward, and cutter lifting end 310 abuts cantilever tip 315, and wheel bracket 314 is pushed to overcome the effect of bracket torsion spring 318 Power is rotated around pivotal axis 317, moves downward cantilever tip 315 along axis X direction, bracket bottom end 320 and guide wheel 316 are in Y-axis It travels forward on direction, pushes saw blade 14 and reciprocating lever 12 with ball bearing 208 to pivot axle center in the Y-axis direction forward, saw blade 14 obtain the cutter lifting power for facilitating cutting, and sweep-saw 1 is in cutter lifting support modes at this time.When cutter lifting drive shaft 302 drives When connecting plate 304 is moved upwards along X-axis, wheel bracket 314 restores initial position under the compressing of bracket torsion spring 318.

When one cutting of reciprocating lever 12 and the completion of saw blade 14 and homing action, wheel bracket 314 and guide wheel 316 also complete one A cutter lifting and homing action.In above-mentioned cutter lifting and homing action, the cutter lifting end 310 of cutter lifting plate 308 has in axis X One extreme higher position and an extreme lower position.

Conversion of the sweep-saw 1 described below between above-mentioned rotary mode and cutter lifting support modes.

Such as Fig. 3, Fig. 6, operating element 402, which is located on the side inside shell 2, is equipped with another guide wheel position-limit mechanism, It is cam 404 in the present embodiment, cam 404 is located at the top of the cantilever tip 315 of wheel bracket 314, is suitable for being operated member Part 402 drives, around the pivot axis rotation of cam 404.Cam 404 has the chassis 413 of attended operation element 402, from chassis The cam disc 411 of 413 cam handles 414 extended and connecting base plate 413.Chassis 413 is generally circular, outside cam disc 411 Side is by the high plane 412 in arc-shaped and in the high plane 410 of plane, high plane 408, and high plane 406 is connected in sequence, it Distance to the pivot axle center of cam 404 successively successively decrease.The inside of cam disc 411 is arc surface 407, cam disc 411 it is outer Side and medial surface are connected by two symmetrically arranged low level faces 409.Described two low level faces 409 are located across cam 404 pivot in the plane in axle center.

As previously mentioned, the bracket torsion spring 318 on wheel bracket 314 oppresses wheel bracket 314 around itself pivotal point pivot always Turn, make guide wheel 316 thereon far from saw blade 14, the cantilever tip 315 of wheel bracket 314 is close to cam 404.Cutter lifting plate 308 Cutter lifting end 310 has an extreme higher position and an extreme lower position on axis X direction, when operating element 402 switches respectively When to 0 grade of cutter lifting, I grades of cutter lifting, II grades of cutter lifting, III grades of cutter lifting, operating element band moving cam 404 is pivoted, respectively by high plane 412, high plane 410, high plane 408, high plane 406 respectively face cantilever tip 315.Each high plane faces to prop up respectively When frame top 315, high plane 412 is located at below the extreme lower position of cutter lifting end 310；High plane 410, high plane 408 and a high position Face 406 is respectively positioned between the extreme higher position and extreme lower position of cutter lifting end 310.In this way, high plane 412 faces cantilever tip 315 When, cantilever tip 315 is limited in the minimum point of high plane 412 on axis X direction, and is located at the minimum of cutter lifting plate 308 Under position, i.e. cutter lifting end 310 cannot contact cantilever tip 315.When cam 404 pivot, high plane 410, high plane 408, When high plane 406 faces cantilever tip 315, due to their gradual pivotal points close to cam 404, cantilever tip 315 is gradually Rise, and be all higher than the extreme lower position of cutter lifting plate 308, lower than the extreme higher position of cutter lifting plate 308, in this way, the lift of cutter lifting plate 308 Knife is applied on guide wheel 316, and long stroke is sequentially increased, and cutter lifting amount is sequentially increased.

When cantilever tip 315 is gradually increasing, guide wheel 316 is also gradually retreated to the direction far from saw blade 14.But sweep-saw 1 In cutter lifting support modes, saw blade 14 is to pivot with ball bearing 308 by workpiece reaction force, saw blade 14 and reciprocating lever 12 for work Point pivots, and follows guide wheel 316 always.

When sweep-saw 1 is in above-mentioned cutter lifting support modes, the rotation function of sweep-saw 1 be it is forbidden, specifically such as It is lower described.

Such as Fig. 3, one end of cam handle 414 connects cam 404, one end of the other end one connecting rod 416 of pivotable connection, The gear handle 420 of the other end of connecting rod 416 one sector gear 418 being pivotally arranged on shell 2 of pivotable connection, In this way, fan-shaped gear 418 can be driven to pivot by cam 404, connecting rod 416 when operating element 402 rotates.Sector gear It is provided with matched rotation locking elements by the of 418, is in the present embodiment rack gear 422.The rack gear 422 is located on shell 2, fits It is suitable for and moves back and forth along axis X direction.The top of rack gear 422 is equipped with the bayonet 424 of a U-shaped, and end is equipped with a toothed region 422a。

Meanwhile the corresponding occlusion portion for being provided with the cooperation U-shaped bayonet 424 in 204 outside of casing of rotating handle 202, this It is casing convex block 426 in embodiment.The position of casing convex block 426 is by design, so that only when the cut surface face of saw blade 14 When in front of axis Y, U-shaped bayonet 424 can just block casing convex block 426.

When operating element 402 is pivoted with moving cam 404 and between 0 grade of cutter lifting, I grades of cutter lifting, II grades of cutter lifting, III grades of cutter lifting When switching, sector gear 418 is driven pivot simultaneously, but is not engaged with the toothed region 422a of rack gear 422, the U-shaped of rack gear 422 Bayonet 424 blocks always casing convex block 426, prevent reciprocating lever 12 is from rotating.Only when operating element 402 is with 404 pivot of moving cam Turning, when being switched to S grades of rotation from III grades of cutter lifting, gear 418 is engaged rack gear 422 and moves downward with carry-over bar 422 along axis X, The U-shaped bayonet 424 of this hour rack 422 is detached from casing convex block 426, and sweep-saw 1 is transformed into rotary mode, and rotating handle 202 can band Dynamic reciprocating lever 12 and saw blade 14 are pivoted around axis X.It is opposite, when operating element 402 is from S grades of rotation to when III grades of switchings of cutter lifting, Gear 418 is engaged rack gear 422 and moves upwards with carry-over bar 422 along axis X, and it is convex that the U-shaped bayonet 424 of rack gear 422 blocks casing Block 426, sweep-saw 1 are transformed into cutter lifting support modes.

It is noted that since the position of casing convex block 426 is by special designing, when the cut surface side of saw blade 14 When sawing 12 front of shell to deflection curve, the U-shaped bayonet 424 of rack gear 422 can not block casing convex block 426, operating element 402 Also it can not be converted from S grades to III grades of cutter lifting of rotation.In the present embodiment, rotating preferably has arrow on knob 402, Help user determine saw blade 14 whether the front of shell 2 of face sweep-saw 1.

Under cutter lifting support modes, two guide wheel position-limit mechanisms above-mentioned: cutter lifting end 310 and cam 404 are in one Kind Support Position, they oppress the cantilever tip 315 of wheel brackets 314, guide wheel are made to be located at saw blade 14 around ball bearing 208 in axis The distance that can achieve is pivoted in the determining plane of X and axis Y intersection, and workpiece is anti-to 14 1, saw blade when the work of sweep-saw 1 Active force fits closely guide wheel 14 and saw blade, in this way, limiting saw blade 14 around the rotation of axis X.When sweep-saw 1 is by lifting When knife support modes are transformed into rotary mode, two guide wheel position-limit mechanisms above-mentioned: cutter lifting end 310 and cam 404 are in A kind of releasing position, they are moved up on axis X direction, and no longer compressing cantilever tip 315 is so that guide wheel is located at saw blade 14 The distance that can achieve is pivoted in the determining plane of axis X and axis Y intersection around ball bearing 208.The cutter lifting function at this time It is prohibited simultaneously, guide wheel leaves saw blade 14, intersects in determining plane around ball bearing 208 in axis X and axis Y positioned at saw blade 14 It pivots except the distance that can achieve, it is described in detail below.

Such as Fig. 3, the tie point of connecting rod 416 and cam handle 414 is additionally provided with a driving lever, is in the present embodiment pin 428, pin 428 is in operating element 402 from III grades of cutter lifting to when S grades of switchings of rotation, and cam 404 pivots, and pin 428 follows convex Wheel shank 414 moves up, and abuts cutter lifting plate side 312 and overcomes the power of cutter lifting plate torsional spring 309, drives 308 pivot of cutter lifting plate Turn, moves upwards cutter lifting end 310 on the direction of axis X, the cantilever tip 315 of wheel bracket 314 is left, with connecting plate Between at one be less than 180 degree angle.In this way, although the connecting plate 304 of cutter lifting component 303 is still driven by a motor in axis It is moved back and forth on the direction of X, but cutter lifting end 310 no longer resists cantilever tip 315 and oppresses bracket bottom end 320 and leading thereon 316 fitting saw blade 14 of wheel, also no longer there is extreme higher position and extreme lower position, cutter lifting function on axis X direction to be therefore prohibited. Meanwhile cam 404 is overturn, low level face 409 faces cantilever tip 315, no longer resists cantilever tip 315 and oppresses bracket bottom end 320 and guide wheel 316 thereon be bonded saw blade 14.In this way, two above-mentioned guide wheel position-limit mechanisms are moved away from it and play limit The position of position effect.After losing limitation, wheel bracket 314 substantially pivots under the effect of bracket torsion spring 318,320 He of bracket bottom end Guide wheel 316 is moved backward along axis Y-direction, leaves the plane determining in axis X and axis Y intersection around ball bearing 208 of saw blade 14 It is upper to pivot the distance that can achieve, no longer contacted with saw blade 14.Therefore saw blade 14 will not limit it around axis X by guide wheel 316 It pivots.

Opposite, when operating element 402 is from S grades of rotation to when III grades of switchings of cutter lifting, operating element 402 is with moving cam 404 The power of bracket torsion spring 318 is overcome to pivot wheel bracket 314, guide wheel 316 is close to saw blade 14, while pin 428 leaves cutter lifting plate Side 312, cutter lifting plate 308 return to cutter lifting operating position under the action of cutter lifting plate torsional spring 309.

Whole narration sweep-saw 1 is between 0 grade of cutter lifting, I grades of cutter lifting, II grades of cutter lifting, S grades of III grades of cutter lifting and rotation below Conversion process.

Such as Fig. 8 a to Fig. 8 e, when operating element 402 is located at 0 grade of cutter lifting, high plane d412 faces the branch of wheel bracket 314 Frame top 315, cantilever tip 315 are located under the extreme lower position of cutter lifting plate 308；It is convex that the U-shaped bayonet 424 of rack gear 422 blocks casing Block 426, the non-pinion rack 422 of gear 418, not in contact with cutter lifting plate side 312, sweep-saw 1 is non-rotatable can not also to be lifted pin 428 Knife.Operating element 402 is switched to I grades of cutter lifting by 0 grade of cutter lifting, and high plane 410 faces cantilever tip 315, and cantilever tip 315 is higher than The extreme lower position of cutter lifting plate 308, lower than the extreme higher position of cutter lifting plate 308；The U-shaped bayonet 424 of rack gear 422 blocks casing convex block In 426, the non-pinion rack 422 of gear 418, for pin 428 not in contact with cutter lifting plate side 312, sweep-saw 1 is non-rotatable, cutter lifting amount It is smaller.Operating element 402 is switched to II grades of cutter lifting by I grades of cutter lifting, and high plane 408 faces cantilever tip 315, cantilever tip 315 Higher than the extreme lower position of cutter lifting plate 308, lower than the extreme higher position of cutter lifting plate 308；It is convex that the U-shaped bayonet 424 of rack gear 422 blocks casing Block 426, the non-pinion rack 422 of gear 418, for pin 428 not in contact with cutter lifting plate side 312, sweep-saw 1 is non-rotatable, cutter lifting amount Between two parties.Operating element 402 is switched to III grades of cutter lifting by II grades of cutter lifting, and high plane 406 is face-to-face to cantilever tip 315, top of support End 315 is higher than the extreme lower position of cutter lifting plate 308, lower than the extreme higher position of cutter lifting plate 308；The U-shaped bayonet 424 of rack gear 422 blocks Casing convex block 426, the non-pinion rack 422 of gear 418, for pin 428 not in contact with cutter lifting plate side 312, sweep-saw 1 is non-rotatable, Cutter lifting amount is maximum.Operating element 402 is switched to S grades of rotation by III grades of cutter lifting, and cam 404 is overturn, and low level face 409 faces bracket Top 315, pin 428 bias cutter lifting plate 308 by cutter lifting plate side 312, and guide wheel 316 pulls back from saw blade 14, and gear 418 is nibbled It closes rack gear 422 and is moved down with carry-over bar 418, the U-shaped bayonet 424 of rack gear 422 leaves casing convex block 426, and sweep-saw 1 can revolve Turn, is unable to cutter lifting.

Opposite, operating element 402 can also successively be adjusted to 0 grade of cutter lifting from rotating S grades, and detailed process repeats no more.

Still there are many specific embodiments by the present invention.All all skills formed using equivalent replacement or equivalent transformation Art scheme, all falls within the scope of protection of present invention.

Claims (9)

1. a kind of reciprocal cutting tool (1), comprising:

Shell (2)；

Motor (4) in shell (2)；

Reciprocator (12,14) in shell (2), the reciprocator (12,14) include by motor (2) driving relative to The reciprocating lever (12) that shell (2) is moved back and forth along axis X and the saw blade (14) being connected with reciprocating lever (12)；

Cutter lifting component (303) in shell (2)；

Transmission parts (314,316) between the cutter lifting component (303) and the reciprocator (12,14)；

The cutter lifting component (303) drives the transmission parts (314,316) to oppress the saw blade to saw blade (14) cut direction (14)；

It is characterized by: the cutter lifting component (303) includes driving the connecting plate moved relative to shell (2) by motor (4) (304) and the cutter lifting plate (308) that is movably connected on the connecting plate (304).

2. a kind of reciprocal cutting tool (1) according to claim 1, it is characterised in that: the transmission parts (314,316) Including wheel bracket (314) and the guide wheel (316) being mounted on wheel bracket (314), the wheel bracket (314) is pivotable It is mounted on shell (2), there is a pivotal axis (317) and is located at the adjoining cutter lifting plate of pivotal axis (317) two sides (308) the bracket bottom end (320) of cantilever tip (315) and the adjacent saw blade (14), the bracket bottom end (320) connect institute State guide wheel (316).

3. a kind of reciprocal cutting tool (1) according to claim 2, it is characterised in that: the wheel bracket (314) and shell Bracket torsion spring (318) are equipped between body (2), bracket torsion spring (318) compressing wheel bracket (314) pivots, and makes cantilever tip (310) close to the cutter lifting plate (308), bracket bottom end (320) and guide wheel (316) are far from the saw blade (14).

4. a kind of reciprocal cutting tool (1) according to claim 3, it is characterised in that: the connecting plate is by the motor Drives edge X-axis moves back and forth.

5. a kind of reciprocal cutting tool (1) according to claim 4, it is characterised in that: cutter lifting plate (308) pivot connects Connect the connecting plate (304).

6. a kind of reciprocal cutting tool (1) according to claim 5, it is characterised in that: the cutter lifting plate includes cutter lifting end (310) and the cutter lifting plate side (312) perpendicular to the cutter lifting end (310) are held, cutter lifting plate (304) the connection cutter lifting plate is turned round Spring (309), cutter lifting plate torsional spring (309) compressing cutter lifting end (310) and the connecting plate (304) are located on same axis.

7. a kind of reciprocal cutting tool (1) according to claim 6, it is characterised in that: including being arranged on shell (2) Operating element (402), the operating element (402) are connected with driving lever (428), and operating element (402) selectivity passes through Driving lever (428) stirs the cutter lifting plate side (312) of the cutter lifting plate (308), by cutter lifting end (310) from be located at and the connection It is one small that the Support Position that plate (304) is on same axis is moved to formation between cutter lifting end (310) and connecting plate (304) In the releasing position of the angle of 180 degree, when the cutter lifting end (310) is moved to the releasing position, the bracket torsion spring (318) it oppresses the wheel bracket (314) to pivot close to the cutter lifting end (310), the guide wheel (316) is made to leave saw blade (14)。

8. a kind of reciprocal cutting tool (1) according to claim 7, it is characterised in that: operating element (402) connection Have cam (404), the cam (404) have pivot axle center and be located at cam (404) periphery on high plane (406,408, 410,412) and low level face (409), the distance that the high plane (406,408,410,412) to cam (404) pivots axle center are big The distance in axle center is pivoted in the low level face (409) to cam (404), the operating element (402) drives the cam (404) Axle center pivot is pivoted about, selective makes high plane (406,408,410,412) or low level face (409) towards the top of support It holds (315), when the high plane (406,408,410,412) is towards the cantilever tip (315), cam (404) oppresses guide wheel (316) saw blade (14) is contacted；When the low level face (409) is towards the cantilever tip (315), bracket torsion spring (318) pressure Compel the cantilever tip (315) to pivot towards the low level face (409), guide wheel (316) leaves saw blade (14).

9. a kind of reciprocal cutting tool (1) according to claim 8, it is characterised in that: the cutter lifting end (310) is located at When Support Position, the cutter lifting end (310) drives a highest order on axis X line (50) by the connecting plate (304) It sets and is moved back and forth between an extreme lower position, there is the cam (404) distance to pivot axle center apart from three height incremented by successively Plane (406,408,410), when the three high plane (406,408,410) is towards wheel bracket (314), in axis X direction Between the upper extreme higher position and extreme lower position for being located at cutter lifting end (310).