CN206306080U - A kind of reciprocating saw head - Google Patents

Abstract

The utility model discloses a kind of reciprocating saw head, belong to graden machine field, including handpiece case, the Oscillating lever bearing component for being used for the reciprocating lever, drive connection that connect cast-cutting saw slice between the reciprocating lever and driving source is located in handpiece case, the Oscillating lever bearing component includes bearing inner-core, bearing outer ring and the swing rod external member being set on bearing inner-core, the swing rod external member includes annulus and swing rod post, the swing rod post is flexibly connected with the reciprocating lever, is connected with the annulus for reducing the stabilizing member vibrated in swing rod external member swing process.The utility model has the advantage of, vibration is effectively reduced, increase stability.

Description

A kind of reciprocating saw head

【Technical field】

The utility model is related to a kind of reciprocating saw head, belongs to graden machine field.

【Background technology】

Reciprocating saw is one of more conventional electric tool in graden machine, and its main operational principle is that motor drives cutting Saw blade reciprocating motion, to realize the purpose of cutting, existing reciprocating saw drives typically by the mode that eccentric wheel is driven and cuts Cut saw blade reciprocating motion, but often volume is larger for eccentric wheel structure, takes big quantity space, cause electric tool overall volume compared with Greatly, and vibrate it is bigger than normal.

It is now this with the reciprocal of Oscillating lever bearing therefore existing market also occurs in that with Oscillating lever bearing to be driven instead of eccentric wheel Although saw solves the problems, such as that volume is larger, the vibration of electric tool is still larger, and stability is not good enough.

【Utility model content】

Technical problem to be solved in the utility model is to overcome the deficiencies in the prior art and provide a kind of hacksaw Head, effectively reduces vibration, increases stability.

Above-mentioned technical problem is solved, the utility model is adopted the following technical scheme that：

A kind of reciprocating saw head, including handpiece case, be located in handpiece case be used for connect cast-cutting saw slice reciprocating lever, pass The dynamic Oscillating lever bearing component being connected between the reciprocating lever and driving source, the Oscillating lever bearing component includes bearing inner-core, axle Bearing outer-ring and the swing rod external member being set on bearing inner-core, the swing rod external member include annulus and swing rod post, the swing rod post It is flexibly connected with the reciprocating lever, is connected with the annulus for reducing the stabilization vibrated in swing rod external member swing process Part.

Using the beneficial effects of the utility model：

Reciprocating saw head in the utility model, annulus is set on bearing inner-core in its swing rod external member, and swing rod Post is then to radially extend to be formed from annulus, and swing rod post is flexibly connected with reciprocating lever, in original reciprocating saw head, entirely The main force part of Oscillating lever bearing component concentrates on the end of swing rod post, and away from the annulus of the position of swing rod column end at Stress is smaller, therefore swing rod external member is in swing process, discontinuity, causes to vibrate in swing process larger, and stability is not good enough, And be connected with annulus and swung for reducing swing rod external member to increase the balance of swing external member in the utility model The stabilizing member vibrated in journey, to allow and be also subjected to a part of power away from the annulus for swinging boom end side, to play the whole pendulum of balance The effect of dynamic external member, finally plays the effect of the effect of vibration for reducing Oscillating lever bearing component, effectively increases reciprocating saw head Service life.

Preferably, the stabilizing member includes the back-moving spring being located between the ring-type end surface and handpiece case.

Preferably, the stabilizing member also includes the balance weight being located on the annulus, the balance weight and the ring Shape portion integrative-structure is fixed on the annulus.

Preferably, the back-moving spring includes preceding spring and rear spring, the preceding spring and rear spring are respectively provided at ring The not homonymy in shape portion.

Preferably, the annulus is provided with the first spring groove for installing the back-moving spring, first spring groove Inside it is provided with the ball bumps of position reset spring inner ring.

Preferably, being provided with internal box in the handpiece case, the Oscillating lever bearing component is installed in the inner box, described The front end of bearing inner-core is connected to the front face of internal box by axis of rotation, and the internal box rear wall is provided with and connects lid, described Connect the bearing groove for covering and being provided with and position the bearing outer ring.

Preferably, the internal box is provided with the shaft hole for positioning the rotating shaft, it is provided with circular arc in the internal box Wall, the lid that connects is extended with towards internal box direction and connects lid inner ring wall to form the bearing groove, connects lid inner ring wall Matching installation On the circular arc internal face, lid inner ring wall, shaft hole, the axis of circular arc internal face of connecing is in same straight line.

Preferably, the back-moving spring includes preceding spring and rear spring, the preceding spring and rear spring are respectively provided at ring The not homonymy in shape portion, the front side wall of the internal box is provided with the second spring groove or spring positioning for installing the preceding spring Post, it is described to connect the 3rd spring groove or spring retention posts for covering and being provided with and install the rear spring.

Preferably, being provided with interior case lid at the top of the internal box, the reciprocating lever is arranged on interior case lid and internal box Between, reciprocating lever backing plate is provided between the reciprocating lever and internal box.

Preferably, being fitted with roller on the swing rod post, the roller coordinates with swing rod intercolumniation gap, and the roller passes through Hinge is on the reciprocating lever.

These features of the present utility model and advantage will be detailed in following specific embodiment, accompanying drawing exposure.

【Brief description of the drawings】

The utility model is described further below in conjunction with the accompanying drawings：

Fig. 1 is to be mounted with the structural representation after different working machine heads with an electric tool；

Fig. 2 is electric tool and drill chuck, the connection diagram of reciprocating saw head；

Fig. 3 is the exploded perspective view of reciprocating saw head；

Fig. 4 is the section view schematic three dimensional views of reciprocating saw head；

Fig. 5 is the cross-sectional plane schematic diagram of reciprocating saw head；

Fig. 6 be Fig. 5 in A-A to cross section schematic diagram；

Fig. 7 is the cross section schematic diagram of B-B direction in Fig. 5；

Fig. 8 is the structural representation of Oscillating lever bearing component；

Fig. 9 is the structural representation for connecing lid；

Figure 10 is the structural representation of side fastening part.

【Specific embodiment】

The technical scheme of the utility model embodiment is explained with reference to the accompanying drawing of the utility model embodiment and Illustrate, but following embodiments are only preferred embodiment of the present utility model, and it is not all.Based on the embodiment in implementation method, Those skilled in the art obtain other embodiment on the premise of creative work is not made, and belong to of the present utility model Protection domain.

As shown in Figure 1 to Figure 2, the present embodiment is a kind of electric tool of multiple-head type, including hand-held body 1, be located at it is hand-held Motor in body 1, the motor is connected with output shaft 10, and the output shaft 10 overhangs the hand-held body 1 Front end, all sides of the output shaft 10 are provided with external screw thread, and external screw thread is clockwise direction, the output shaft 10 in the present embodiment On be threaded with replaceable working machine head, the working machine head is reciprocating saw head 2 or drill chuck 3.One hand-held body 1 Two heads of wildcard, for user, can more save money without the hand-held body 1 of repeat buying, and for production firm, Hand-held body 1 is a general part, can in high volume be produced, and traditional drill chuck 3, reciprocating saw head 2 are all right respectively There should be different hand-held bodies, cause that during production production will be corresponded, it is impossible to produce in enormous quantities, when order changes, Easily cause parts to overstock, and after hand-held body 1 is arranged into general part, can courageously be produced in batches, it may not be necessary to Excessively limited by order, for correspondence production, significantly reduced production pressure.

It is that the mode being connected through a screw thread is connected in the present embodiment, between working machine head and hand-held body 1, first, screw thread Connected mode simple structure, connective stability is good, secondly because output shaft 10 inherently receives motor-driven rotation, so work Make head with hand-held body 1 when being connected, using the characteristic of the own rotation of output shaft 10, output shaft 10, can be certainly when rotating The dynamic mating connection realized with working machine head, when output shaft 10 is inverted, can be automatically obtained the dismounting with working machine head, very just Just.

As shown in Figure 2, it is the specific connected mode of hand-held body 1 and two kind of head：

When working machine head is drill chuck 3, the drill chuck 3 is provided with the second centre bore 31 along its axial direction, in second The hole wall in heart hole 31 is provided with screw thread be engaged with the matching of the external screw thread of output shaft 10, during installation, all sides of output shaft 10 and Second centre bore 31 is threadedly coupled.

Because drill chuck 3 is influenceed very big by torsion in the course of the work, in order to prevent drill chuck 3 from making by reverse torsion Depart from from output shaft 10 under, the present embodiment is further reinforced to drill chuck 3, and the end face indent of the output shaft 10 has Endoporus 101, the wall of the endoporus 101 is provided with internal thread, and end face screw 32 is screwed with endoporus 101, when output shaft 10 all sides with After second centre bore 31 is connected, end face screw 32 is penetrated from the other end of the second centre bore 31, and is screwed into the interior of output shaft 10 In hole 101, wherein the external thread rotary of the internal thread of the endoporus 101 and output shaft 10 is to conversely, the i.e. side of screwing of end face screw 32 To being left-handed, i.e. the direction of back-outing of drill chuck 3 is the tightening direction of end face screw 32, so when drill chuck 3 is back-outed direction Torsion when, end face screw 32 more be tightened, so as to realize the effect of self-locking.

When working machine head is reciprocating saw head 2, reciprocating saw head 2 is provided with the first centre bore 41, first center Hole 41 is threadedly coupled with all sides of output shaft 10, used as further fastening, in the present embodiment, the front end of the hand-held body 1 Face is provided with positioning round table 12, the axis of the output shaft 10 and the axis coaxle of positioning round table 12, and output shaft 10 is stretched out in and determined The end face of circle of position platform 12, the rear end face of the reciprocating saw head 2 is provided with the positioning circular groove 51 matched with the positioning round table 12, During installation, positioning round table 12 is fitted in positioning circular groove 51, while output shaft 10 is then screwed in the first centre bore 41.

The side wall of the positioning circular groove 51 is provided with the side fastening part 21 for the radially fixed positioning round table 12, tool For body, the reciprocating saw head 2 in the present embodiment includes handpiece case, and the wall of the positioning circular groove 51 is provided with side lock tieholen 52, handpiece case includes upper shell 22, lower house 23, soft rubber sleeve 24 in the present embodiment, and side fastening part 21 is in the present embodiment The trip bolt in side lock tieholen 52 is connected to, when trip bolt is tightened, the extruding force of radial direction can be produced to positioning round table 12, So as to reach the effect of fastening.

Used as the preferred of the present embodiment, trip bolt is provided with annular protrusion 211 towards the inner side end of positioning round table 12, The centre of annular protrusion 211 is hollow, such structure design, can be increased between trip bolt and all sides of positioning round table 12 Contact area, frictional force is bigger, and fastening effect is more preferable.Additionally, the side of the outboard end of trip bolt is provided with hexagon ring 212, because many screws of reciprocating saw head 2 are all hex screws, the six of column will be used when dismounting these hex screws Angle spanner, therefore hexagon ring 212 is set on trip bolt, the die nut of column can equally pass through the hexagon ring 212, be formed An effect for handle is similar to, fastening effect is carried out to trip bolt, the structure of trip bolt for details, reference can be made to Figure 10.

Further, since reciprocating saw is in real work, the angle cut can may be there are certain requirements, adjusted for convenience The angle, the front end face of the hand-held body 1 is provided with dial, the rear end face of the reciprocating saw head 2 be provided with it is described Dial is to mutatis mutandis alignment target 251.During adjustment, first trip bolt can be come loose, now can manually rotate reciprocating saw head 2, in rotation process, alignment target 251 can correspond to the scale on dial, after angle on target is adjusted to, trip bolt be twisted Tightly, fixed so as to realize angle, when so even vertically hold hand-held body 1, can also realize cutting the oblique of target object Cut.

If Fig. 3 to Fig. 7 is the specific expansion to the internal structure of reciprocating saw head 2, describe for convenience, define in figure 3 Front and rear direction, the front and rear direction in below describing is the front and rear direction defined in Parameter Map 3：

The general structure of reciprocating saw head 2, including handpiece case, be located in handpiece case be used for connect cast-cutting saw slice 26 The Oscillating lever bearing component 4 of reciprocating lever 6, drive connection between the reciprocating lever 6 and output shaft 10, Oscillating lever bearing component 4 is machine A kind of conventional mechanical bearing in tool field, its Main Function be by convert rotational motion into axial direction reciprocating motion, It is that the rotation of output shaft 10 is driven into the linear running of reciprocating lever 6 in the present embodiment, and finally drives the cast-cutting saw slice 26 back and forth to cut Cut object.

Oscillating lever bearing component 4 includes bearing inner-core 42, bearing outer ring 43 and is set on bearing inner-core 42 in the present embodiment Swing rod external member, bearing inner-core 42 is provided with the first centre bore 41, and the first centre bore 41 connects with all flank threads of output shaft 10 Connect, bearing outer ring 43 is also to be sleeved on bearing inner-core 42, bearing outer ring 43 is that circumferential plane is rotated, and swing rod external member is by axle The swing that the slant rail on 42 weeks sides of inner core is rotated and produces axial direction is held, the swing rod external member includes annulus 44 With swing rod post 45, by ball sleeve on the slant rail of bearing inner-core 42, swing rod post 45 is by the footpath of annulus 44 to annulus 44 To the thin cylinder for extending formation, the schematic three dimensional views of Oscillating lever bearing component 4 can be found in Fig. 8.

The end of swing rod post 45 is fitted with the roller 61 of column, and the sidepiece of roller 61 is provided with the plug-in opening 611 of insertion, plug-in opening 611 is that gap coordinates with swing rod post 45, and two ends of roller 61 set win and are connected with two roller pins 612, back and forth The rearward end of bar 6 is provided with roller groove 62, and the left side and right side of roller groove 62 are provided with roller pin hole, the roller pin of the roller 61 612 are arranged in the roller pin hole, and whole roller 61 is being contained in roller groove 62, during swing rod 45 swing of post, can be led to Crossing roller pin 612 drives reciprocating lever 6 to move forward and backward, because swing rod post 45 is swung with certain angle in swing process, therefore Also a certain degree of rotation is produced in swing process between roller pin 612 and roller pin hole, to reduce interference.

The main force part of whole Oscillating lever bearing component 4 concentrates on the end of swing rod post 45, the i.e. top of swing rod external member, And it is smaller away from stress at the annulus 44 of the position of the end of swing rod post 45, therefore swing rod external member is in swing process, unbalance stress It is even, cause to vibrate in swing process larger, stability is not good enough, the balance of external member is swung in the present embodiment in order to increase, in ring It is connected with shape portion 44 for reducing the stabilizing member vibrated in swing rod external member swing process, is allowed away from the end side of swing rod post 45 Annulus 44 is also subjected to a part of power, and to play a part of, balance is whole to swing external member, finally plays reduction Oscillating lever bearing component 4 Effect of vibration effect, effectively increase the service life of reciprocating saw head 2.

And stabilizing member is made up of two parts in the present embodiment, a portion is the balance being located on the annulus 44 Block 441, the balance weight 441 and the integrative-structure of the annulus 44 or is fixed on the annulus 44.In the present embodiment Balance weight 441 is, from the extending radially outward weight of annulus 44, the stress degree between two ends to be balanced with weight, from And reduce the vibration that swing rod external member is caused because of two ends unbalance stress.

Another part of stabilizing member, then be the back-moving spring being located between the end face of annulus 44 and handpiece case.This implementation Back-moving spring has two in example, respectively preceding spring 46 and rear spring 47, and the preceding spring 46 and rear spring 47 are respectively provided at ring The not homonymy in shape portion 44, back-moving spring plays two effects in the present embodiment：First, being to play flat as balance weight 441 The effect at weighing apparatus swing rod external member two ends, reduces swing rod sleeve vibrations；On the other hand, back-moving spring possesses storage when by compression or stretching The effect of energy and can be released, when annulus 44 swings to two extreme positions, back-moving spring can provide restoring force for annulus 44, So as to provide reciprocal power to reciprocating lever 6, output shaft 10 can be to a certain extent reduced to oscillation bearing work done.

The specific mounting structure of back-moving spring, Oscillating lever bearing component 4：

Internal box 7 is provided with the present embodiment in handpiece case, the top of internal box 7 and rearward end are opening, swing rod Bearing assembly 4 is arranged in internal box 7, and the front end of wherein bearing inner-core 42 is connected with rotating shaft 421, rotating shaft 421 and bearing inner-core Small bearing 422 is provided between 42, the front side wall of internal box 7 is provided with the shaft hole 71 for installing the rotating shaft 421, internal box Circular arc internal face 72 is provided with inside 7, the axis of circular arc internal face 72 is in same straight line, internal box 7 with the axis of shaft hole 71 Rearward end be provided with and connect lid 5, the front end face for connecing lid 5 is extended with towards the direction of internal box 7 and connects lid inner ring wall 53, connects lid inner ring The outer shape of wall 53 is matched with circular arc internal face 72, and connects the axis of lid inner ring wall 53 and the axis of circular arc internal face 72 is in Same axis, connects the inner hollow of lid inner ring wall 53 and forms bearing groove 531, and the bearing outer ring 43 is inlaid in bearing groove 531.

The rear end face for connecing lid 5 is extended with and connects lid collar wall 54, connects the above-mentioned positioning circular groove 51 of the inner hollow of lid collar wall 54, Four edges for connecing lid 5 are provided with installation through-hole, and the rear end of handpiece case is provided with rear end cap 25, and screw sequentially passes through rear end cap 25th, connect lid 5, and most at last rear end cap 25, connect lid 5 and be fixed on the rear end face of internal box 7, the concrete structure for connecing lid 5 can be found in Fig. 9.

After being so completed, there is support the front-end and back-end of Oscillating lever bearing component, and there is the front side wall branch of internal box 7 front end Support, rear end connects lid 5 and supports, and more preferably, rotation process beating degree is small for two ends support rear stability, and in the present embodiment, it is overall After installation, in same straight line, axiality is high, swings for the axis for connecing lid inner ring wall 53, shaft hole 71, circular arc internal face 72 Vibrated in bearing assembly operation process very small.

The assembling of back-moving spring：The bottom of the end face of the annulus 44 is provided with the first spring groove 442, the first spring groove 442 have two, and respectively positioned at the front end face and rear end face of annulus 44, the shape of the first spring groove 442 is in loudspeaker in the present embodiment The ball bumps 443 of position reset spring inner ring are provided with mouth shape, first spring groove 442, on the front side wall of internal box 7 Spring retention posts 73 are provided with, described one end of preceding spring 46 is set on spring retention posts 73, and the other end is positioned at ball bumps It is wallowing motion when being swung due to annulus 44 on 443, the purpose for setting bell mouth shape is annulus 44 in swing process In, the probability that the first spring groove 442 is interfered with preceding spring 46 can be reduced.Certainly, in the present embodiment on the front side wall of internal box 7 Spring retention posts 73, it is also possible to change second spring groove into, the front end of preceding spring 46 can be contained in second spring groove.

For rear spring 47, the front end face for connecing lid 5 is provided with the 3rd spring groove, and one end of rear spring 47 is inlaid in In three spring grooves 55, the other end is inlaid in the first spring groove 442, and the 3rd spring groove 55 is replaceable into spring retention posts.

It should be noted that be to be resetted using dual spring in the present embodiment, those skilled in the art also will be appreciated that, In other embodiment, it would however also be possible to employ Single spring is resetted, this implementation method also falls into protection model of the present utility model Enclose.

The top of internal box 7 is provided with interior case lid 74, and the reciprocating lever 6 is arranged between interior case lid 74 and internal box 7, separately Outward, in order to reduce frictional force of the reciprocating lever 6 in motion process, friction sleeve is provided between the top of reciprocating lever 6 and interior case lid 74 63, reciprocating lever backing plate 64, upper friction sleeve 63 and reciprocating lever backing plate 64 are provided between the bottom of reciprocating lever 6 and the top of internal box 7 It is made of wear-resistant material.During assembling, interior case lid 74, reciprocating lever backing plate 64 are fixed on internal box 7 together simultaneously with screw Top, while internal box 7 is fixed between upper shell 22 and lower house 23, after upper shell 22 and lower house 23 are completed, In upper shell 22 and the outer wrap soft rubber sleeve 24 of lower house 23.

When reciprocating saw head 2 is installed to hand-held body 1, positioning circular groove 51 is first directed at positioning round table 12, after alignment, due to Positioning round table 12 is coaxial with output shaft 10, then output shaft 10 is also accordingly aligned with the first centre bore 41 on bearing inner-core 42, Start the switch on hand-held body 1, start output shaft 10 and rotate, by the external screw thread on 10 weeks sides of output shaft, output shaft 10 It is automatically mounted into the first centre bore 41, after installation, user can be finely adjusted according to the cutting needs of oneself, setting angle, After having adjusted, locked using side fastening part 21.

When reciprocating saw head 2 is dismantled, under normal circumstances, it is only necessary to unclamp side fastening part 21, then by handset body 1 On reversal switch, can just allow output shaft 10 to invert, when output shaft 10 is inverted, automatic can be screwed out from the first centre bore 41.So And in many cases, reciprocating saw after cutting work is carried out, the first centre bore 41 in bearing inner-core 42 often with output shaft 10 are killed, and when output shaft 10 is inverted, bearing inner-core 42 also can be inverted accordingly, and output shaft 10 cannot be from first Screwed out in centre bore 41, the occurrence of in order to prevent this kind of, locking device is devised to reciprocating lever 6 in the present embodiment.

Specifically, described internal box 7 is provided with securing rod perforation 75, and activity chain is connected to locking in securing rod perforation 75 Bar 8, securing rod 8 is located at the bottom of reciprocating lever 6 in the present embodiment, and the bottom of reciprocating lever 6 is provided with lock hole 65, the top of securing rod 8 Portion is provided with spacing ring 81, and the bottom radial direction reaming of the securing rod perforation 75 forms button slot 751, the bottom of the securing rod 8 Be provided with button ring 82, button ring 82 and the releasable connection of securing rod 8, button ring 82 are contained in button slot 751, and button ring 82 with Button return spring 83 is provided between the roof of button slot 751.

When disassembly is desired, user can be with button press ring 82, and button return spring 83 is compressed, so that securing rod 8 top is inserted and locking is completed in the lock hole 65, cannot realize moving forward and backward after reciprocating lever 6 is locked, so as to just limit The swing of swing rod post 45, after swing rod post 45 is limited, bearing inner-core 42 is also rotated by limitation, when now output shaft 10 is inverted, Output shaft 10 is just automatic to be screwed out from bearing inner-core 42, and situation about inverting is followed without bearing inner-core 42, works as output shaft After 10 screw out, release button ring 82, button ring 82 can self-return in the presence of button return spring 83.

The above, specific embodiment only of the present utility model, but protection domain of the present utility model do not limit to In this, it is familiar with the those skilled in the art and should be understood that the utility model including but not limited to accompanying drawing and above specific embodiment party Content described in formula.Any modification without departing from function and structure principle of the present utility model is intended to be included in claims Scope in.

Claims (10)

1. a kind of reciprocating saw head, including handpiece case, be located in handpiece case be used for connect cast-cutting saw slice reciprocating lever, transmission The Oscillating lever bearing component between the reciprocating lever and driving source is connected to, the Oscillating lever bearing component includes bearing inner-core, bearing Outer ring and the swing rod external member being set on bearing inner-core, it is characterised in that the swing rod external member includes annulus and swing rod post, institute State swing rod post to be flexibly connected with the reciprocating lever, be connected with the annulus and vibrate for reducing in swing rod external member swing process Stabilizing member.

2. reciprocating saw head as claimed in claim 1, it is characterised in that the stabilizing member include being located at the ring-type end surface with Back-moving spring between handpiece case.

3. reciprocating saw head as claimed in claim 1, it is characterised in that the stabilizing member also includes being located on the annulus Balance weight, the balance weight and the annulus integrative-structure or is fixed on the annulus.

4. reciprocating saw head as claimed in claim 2, it is characterised in that the back-moving spring includes preceding spring and rear spring, institute State preceding spring and rear spring is respectively provided at the not homonymy of annulus.

5. reciprocating saw head as claimed in claim 2, it is characterised in that the annulus is provided with installs the back-moving spring First spring groove, is provided with the ball bumps of position reset spring inner ring in first spring groove.

6. reciprocating saw head as claimed in claim 2, it is characterised in that internal box, the swing rod are provided with the handpiece case Bearing assembly is installed in the inner box, and the front end of the bearing inner-core is connected to the front face of internal box by axis of rotation, institute State internal box rear wall and be provided with and connect lid, it is described to connect the bearing groove for covering and being provided with and position the bearing outer ring.

7. reciprocating saw head as claimed in claim 6, it is characterised in that the internal box is provided with the rotating shaft for positioning the rotating shaft Hole, is provided with circular arc internal face in the internal box, the lid that connects is extended with that to connect lid inner ring wall described to be formed towards internal box direction Bearing groove, connects lid inner ring wall Matching installation on the circular arc internal face, described to connect lid inner ring wall, shaft hole, circular arc internal face Axis be in same straight line.

8. reciprocating saw head as claimed in claim 6, it is characterised in that the back-moving spring includes preceding spring and rear spring, institute State preceding spring and rear spring is respectively provided at the not homonymy of annulus, the front side wall of the internal box is provided with the installation preceding spring Second spring groove or spring retention posts, it is described connect cover be provided with the 3rd spring groove or spring that the rear spring is installed determine Position post.

9. reciprocating saw head as claimed in claim 6, it is characterised in that interior case lid is provided with the top of the internal box, it is described Reciprocating lever is arranged between interior case lid and internal box, and reciprocating lever backing plate is provided between the reciprocating lever and internal box.

10. the reciprocating saw head as described in one of claim 1 to 9, it is characterised in that be fitted with roller on the swing rod post, institute State roller to coordinate with swing rod intercolumniation gap, the roller is by hinge on the reciprocating lever.