CN221013387U - Structure of reciprocating saw - Google Patents

Abstract

The application relates to a reciprocating saw structure which comprises a handle body, an outer cutter tube, a supporting sleeve, a reciprocating swinging piece and a saw piece. On the one hand, when the reciprocating swinging piece reciprocates, the cutter bar is driven to act, the cutter bar correspondingly drives the saw head to reciprocate, and the saw piece can stably reciprocate under the supporting action of the supporting sleeve; on the other hand, when assembling reciprocal swinging member and cutter arbor, because the external diameter of support cover is less than the internal diameter of outer sword pipe, outer sword pipe can follow axial direction and remove for the support cover, makes the proximal end of cutter arbor expose to can be convenient for carry out the operation of being connected with reciprocal swinging member with the proximal end of cutter arbor, assembly efficiency is higher, can improve the product qualification rate, and failure probability reduces, thereby stability and security improve. In addition, after the connection operation of the proximal end of the cutter bar and the reciprocating swinging piece is finished, the outer cutter tube is moved to a preset position, and the distal section of the outer cutter tube and the proximal end of the supporting sleeve are connected and fixed.

Description

Structure of reciprocating saw

Technical Field

The application relates to the technical field of medical equipment, in particular to a reciprocating saw structure.

Background

The reciprocating saw structure is used for converting the rotation action into the reciprocating action, so that the saw blade cuts bone tissues under high-frequency motion, and the purpose of surgical treatment is achieved. In the related art, the reciprocating saw structure drives the bearing to move in a circular shape through the eccentric shaft, and synchronously drives the shifting fork to swing when the bearing moves in the circular shape, and synchronously drives the structural member consisting of the driving rod, the connecting rod, the supporting rod and the saw blade head to reciprocate when the shifting fork swings. However, more parts, limited welding operation space, high part failure probability and welding spot failure probability and low assembly efficiency.

Disclosure of Invention

Based on this, it is necessary to overcome the drawbacks of the prior art, and to provide a reciprocating saw structure that can facilitate processing and assembly, improve product yield, reduce failure probability, and thereby improve stability and safety.

A reciprocating saw structure, the reciprocating saw structure comprising:

A handle body;

the proximal end of the outer cutter tube is connected with the handle body;

The outer diameter of the supporting sleeve is smaller than the inner diameter of the outer cutter tube, so that the outer cutter tube moves relative to the supporting sleeve along the axial direction, and when the proximal end of the supporting sleeve moves to a preset position inside the outer cutter tube, the proximal end of the supporting sleeve is fixedly connected with the distal end of the outer cutter tube;

The reciprocating swinging piece is arranged in the handle body in a swinging way; and

The saw piece, saw the piece includes saw head and cutter arbor, the external diameter of saw head is greater than the internal diameter of outer sword pipe, the cutter arbor rotationally wears to locate in the outer sword pipe, saw head follow support the front end of cover stretch out and with the distal end of cutter arbor links to each other, the cutter arbor rotationally wears to locate in proper order support the cover with in the outer sword pipe, the proximal end of cutter arbor with reciprocating swinging member links to each other, synchronous drive when reciprocating swinging member swings the cutter arbor is around its central axis reciprocating swing.

In one embodiment, a first space S1 is arranged between the distal end face of the support sleeve and the proximal end face of the saw head, and S1 is 1mm-10mm.

In one embodiment, the shuttle is provided with a connecting sleeve, and the proximal end of the cutter bar is coaxially connected to the connecting sleeve.

In one embodiment, the reciprocating saw structure further comprises a first bearing arranged in the handle body, the connecting sleeve is arranged in the first bearing in a penetrating mode, the first bearing is located outside the outer cutter tube, and a second interval S2 is arranged between the first bearing and the proximal end face of the outer cutter tube.

In one embodiment, the reciprocating saw structure further comprises an eccentric shaft; the eccentric shaft is rotatably arranged in the handle body in a penetrating manner, and is provided with a power input end and a power output end which are oppositely arranged, wherein the power input end is used for being connected with the power driving mechanism; the reciprocating swinging piece is provided with a movable hole, the power output end penetrates through the movable hole, and the power output end can synchronously drive the reciprocating swinging piece to swing when moving.

In one embodiment, the movable aperture is configured as a kidney-shaped aperture, and the power take-off is movable along and rotatable within the kidney-shaped aperture.

In one embodiment, the power output end is provided with a spherical bearing, and the spherical bearing is in abutting fit with the hole wall of the movable hole.

In one embodiment, at least one second bearing is arranged inside the shank body, and the eccentric shaft is rotatably arranged in the second bearing.

In one embodiment, the handle body is further provided with two axial limiting members respectively positioned at two opposite sides of the second bearing.

In one embodiment, the handle body comprises a first handle body and a second handle body detachably connected with the first handle body, wherein one axial limiting piece is a gasket clamped between the first handle body and the second handle body, and the second bearing is arranged in the second handle body; the reciprocating swinging piece is arranged in the second handle body in a swinging way, and the second handle body is connected with the outer cutter tube.

According to the reciprocating saw structure, on one hand, when the reciprocating swinging piece swings in a reciprocating manner, the cutter bar is driven to act, the cutter bar correspondingly drives the saw head to swing in a reciprocating manner, and the saw piece can stably rotate in a reciprocating manner under the supporting action of the supporting sleeve; on the other hand, when assembling reciprocal swinging member and cutter arbor, because the external diameter of support cover is less than the internal diameter of outer sword pipe, outer sword pipe can follow axial direction and remove for the support cover, makes the proximal end of cutter arbor expose to can be convenient for carry out the operation of being connected with reciprocal swinging member with the proximal end of cutter arbor, assembly efficiency is higher, can improve the product qualification rate, and failure probability reduces, thereby stability and security improve. In addition, after the connection operation of the proximal end of the cutter bar and the reciprocating swinging piece is finished, the outer cutter tube is moved to a preset position, and the distal section of the outer cutter tube and the proximal end of the supporting sleeve are connected and fixed. In addition, the outer diameter of the saw head is not limited by the inner diameter of the outer cutter tube, and the outer diameter of the saw head can be designed to be larger than the inner diameter of the outer cutter tube, so that the cutting requirement of tissues is met.

Drawings

FIG. 1 is a schematic view of a reciprocating saw structure according to an embodiment of the present application.

Fig. 2 is a cross-sectional structural view at A-A of fig. 1.

Fig. 3 is an enlarged schematic view of the structure of fig. 2 at B.

Fig. 4 is an enlarged schematic view of the structure of fig. 2 at C.

10. A handle body; 11. a first handle body; 12. a second handle body; 20. an outer cutter tube; 30. a support sleeve; 40. a reciprocating swing member; 41. connecting sleeves; 42. a movable hole; 50. sawing a piece; 51. sawing heads; 511. saw teeth; 52. a cutter bar; 60. a first bearing; 70. a second bearing; 80. an eccentric shaft; 81. a power input; 82. a power output end; 90. an axial limiting piece.

Detailed Description

In order that the above objects, features and advantages of the application will be readily understood, a more particular description of the application will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. The present application may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the application, whereby the application is not limited to the specific embodiments disclosed below.

In the description of the present application, it should still be noted that, proximal refers to the end of the instrument or component that is proximal to the operator, and distal refers to the end of the instrument or component that is distal to the operator; axial refers to a direction parallel to the central line of the distal and proximal ends of the instrument or component, radial refers to a direction perpendicular to the axial direction, and circumferential refers to a direction around the axial direction.

Referring to fig. 1 to 4, fig. 1 is a schematic structural view of a reciprocating saw structure according to an embodiment of the present application. Figure 2 shows a cross-sectional block diagram of figure 1 at A-A. Fig. 3 shows an enlarged schematic view of the structure of fig. 2 at B. Fig. 4 shows an enlarged schematic view of the structure of fig. 2 at C. In one embodiment, the present application provides a reciprocating saw structure, which includes a handle 10, an outer cutter tube 20, a supporting sleeve 30, a reciprocating swing member 40 and a saw member 50. The proximal end of the outer cutter tube 20 is connected to the handle body 10. The outer diameter of the support sleeve 30 is smaller than the inner diameter of the outer cutter tube 20 so that the outer cutter tube 20 moves in the axial direction relative to the support sleeve 30, and when the proximal end of the support sleeve 30 moves to a preset position inside the outer cutter tube 20, the proximal end of the support sleeve 30 is fixedly connected with the distal end of the outer cutter tube 20. The reciprocating swinging member 40 is swingably disposed in the handle body 10, the saw member 50 includes a saw head 51 and a cutter bar 52, the outer diameter of the saw head 51 is larger than the inner diameter of the outer cutter tube 20, the cutter bar 52 is rotatably disposed in the outer cutter tube 20 in a penetrating manner, the saw head 51 extends out from the front end of the supporting sleeve 30 and is connected with the distal end of the cutter bar 52, the cutter bar 52 is rotatably disposed in the supporting sleeve 30 and the outer cutter tube 20 in a penetrating manner in sequence, the proximal end of the cutter bar 52 is connected with the reciprocating swinging member 40, and the cutter bar 52 is synchronously driven to reciprocate around the central axis thereof when the reciprocating swinging member 40 swings. Specifically, the shuttle 40 is provided with a connecting sleeve 41. The proximal end of the cutter bar 52 is coaxially connected to the connection sleeve 41.

In the above-mentioned reciprocating saw structure, on one hand, when the reciprocating swinging member 40 swings reciprocally, the connecting sleeve 41 drives the cutter bar 52 to act, the cutter bar 52 correspondingly drives the saw head 51 to swing reciprocally, and the saw member 50 can rotate reciprocally stably under the supporting action of the supporting sleeve 30; on the other hand, when assembling the reciprocating swing member 40 and the cutter bar 52, since the outer diameter of the support sleeve 30 is smaller than the inner diameter of the outer cutter tube 20, the outer cutter tube 20 can move relative to the support sleeve 30 in the axial direction, so that the proximal end of the cutter bar 52 is exposed, the connection operation between the proximal end of the cutter bar 52 and the reciprocating swing member 40 can be facilitated, the assembly efficiency is high, the product yield can be improved, the failure probability is reduced, and the stability and safety are improved. In addition, when the connection operation of the proximal end of the cutter bar 52 with the reciprocating swing member 40 is completed, the outer cutter tube 20 is moved to a predetermined position, and the distal section of the outer cutter tube 20 is fixedly connected with the proximal end of the supporting sleeve 30. In addition, the outer diameter of the saw head 51 is not limited by the inner diameter of the outer cutter tube 20, and the outer diameter of the saw head 51 may be designed to be larger than the inner diameter of the outer cutter tube 20 so as to meet the cutting requirements of the tissue.

Referring to fig. 2-4, in one embodiment, the support sleeve 30 includes, but is not limited to, a wear resistant material.

Referring to fig. 2 to 4, in one embodiment, a first space S1 is provided between the distal end face of the support sleeve 30 and the proximal end face of the saw head 51, and S1 is 1mm to 10mm. In this way, the proximal end of the saw head 51 is not interfered by the support sleeve 30 during the reciprocating rotation, ensuring a normal cutting operation on the tissue. In addition, the first spacing S1 is small enough, i.e., not too large, to prevent tissue from being entangled in a location between the distal end face of the support sleeve 30 and the proximal end face of the saw head 51 when the first spacing S1 is too large.

Specifically, the first spacing S1 includes, but is not limited to, values of 1mm, 2mm, 3mm, 4mm, 5mm, 8mm, 10mm, etc., or any values other than 1mm to 10 mm.

Referring to fig. 2-4, in one embodiment, the reciprocating saw structure further includes a first bearing 60 disposed within the handle body 10. The connecting sleeve 41 is arranged in the first bearing 60 in a penetrating way, the first bearing 60 is positioned outside the outer cutter tube 20, and a second interval S2 is arranged between the first bearing 60 and the proximal end face of the outer cutter tube 20. In this way, since the first bearing 60 and the proximal end face of the outer cutter tube 20 are provided with the second space S2, the outer cutter tube 20 and the first bearing 60 do not interfere with each other.

The second space S2 is not smaller than 1mm, and the specific size of the second space S2 can be flexibly adjusted and set according to actual requirements, which is not limited herein.

Referring to fig. 2-4, in one embodiment, the reciprocating saw structure further includes an eccentric shaft 80. The eccentric shaft 80 is rotatably inserted into the handle body 10, and the eccentric shaft 80 is provided with a power input end 81 and a power output end 82 which are oppositely arranged. The power input 81 is adapted to be connected to a power drive mechanism (not shown). The reciprocating swinging member 40 is provided with a movable hole 42, the power output end 82 penetrates through the movable hole 42, and the power output end 82 can synchronously drive the reciprocating swinging member 40 to swing when moving. Thus, when in operation, the power driving mechanism drives the eccentric shaft 80 to rotate, the power output end 82 correspondingly rotates circumferentially, the reciprocating swinging member 40 is synchronously driven to swing, the cutter bar 52 is synchronously driven to rotate reciprocally around the central axis of the cutter bar 52 when the reciprocating swinging member 40 swings, and the saw head 51 correspondingly rotates reciprocally to realize sawing action. It can be seen that the saw 50 is mainly completed by the mutual cooperation of the eccentric shaft 80, the reciprocating swinging member 40 and the cutter bar 52, and the adopted parts are fewer, so that the structure is simplified, the processing and the assembly are more convenient, the product qualification rate is improved, the failure probability is reduced, and the stability and the safety are improved. In addition, the contact surface of the part is smaller, and the heating value is reduced; in addition, the whole structure is compact in arrangement, and the cutter has high rigidity.

It should be noted that, the swinging of the reciprocating swinging member 40 refers to a back-and-forth rotation performed by using the central axis of the cutter bar 52 as a rotation center, where the preset amplitude is smaller than 360 °, specifically, for example, 15 °, 30 °,45 °, 60 °,90 ° or 120 °, and the like, and may be flexibly adjusted and set according to actual requirements. When the reciprocating swinging member 40 swings, since the reciprocating swinging member 40 is connected with the cutter bar 52, the cutter bar 52 can be driven to reciprocally rotate by a preset amplitude.

In some embodiments, the end of the oscillating member 40 and the cutter bar 52 may be coupled by, but not limited to, welding, bonding, clamping, or fastening using pins, rivets, bolts, screws, or the like, or may be coupled by other means, that is, the oscillating member 40 is fixedly coupled to the end of the cutter bar 52, so as to drive the cutter bar 52 to rotate stably during the oscillating motion.

Referring to fig. 3 and fig. 4, in some embodiments, the saw head 51 is provided with one or more saw teeth 511, and all the saw teeth 511 are distributed around the circumference of the saw head 51 or are disposed in a part of the circumference, which can be flexibly adjusted and set according to actual requirements.

Alternatively, the shape of the serrations 511 includes, but is not limited to, regular shapes such as triangles, squares, pentagons, arcs, ovals, and the like, as well as other irregular shapes.

Referring to fig. 3 and 4, in one embodiment, the movable aperture 42 is configured as a kidney-shaped aperture along which the power take-off 82 is movable and rotatable. Thus, when the power output end 82 rotates circumferentially, the power output end correspondingly moves along and/or rotates in the waist-shaped hole, so that the reciprocating swinging member 40 can be driven to swing stably.

Referring to fig. 3 and 4, in one embodiment, the power take-off 82 is provided with spherical bearings. The spherical bearing is in abutting fit with the wall of the movable hole 42. Thus, the spherical bearing can flexibly rotate when the power output end 82 drives the reciprocating swinging member 40 to act, and the defect of locking can be avoided.

Of course, as some alternative solutions, the spherical bearing may be omitted, for example, the outer wall surface of the power output end 82 is set to be a smooth surface, specifically a smooth spherical surface, so that the defect of seizing during the movement of the power output end 82 can be avoided.

Referring to fig. 3 and 4, in some embodiments, the power output end 82 contacts two opposite inner side walls of the waist-shaped hole, or contacts one of the inner side walls of the waist-shaped hole, and a gap is provided between the other opposite inner side wall.

Referring to fig. 3 and 4, in one embodiment, at least one second bearing 70 is disposed within the handle 10. The eccentric shaft 80 is rotatably provided in the second bearing 70. In this way, the rotational stability of the eccentric shaft 80 can be improved by the supporting action of the second bearing 70.

Referring to fig. 3 and 4, in one embodiment, two axial stoppers 90 are further disposed inside the shank 10 and are respectively located at two opposite sides of the second bearing 70. Thus, the two axial limiting members 90 are respectively located at two opposite sides of the second bearing 70, and perform an axial limiting function on the second bearing 70.

Referring to fig. 3 and 4, in one embodiment, the handle 10 includes a first handle 11 and a second handle 12 detachably connected to the first handle 11. One of the axial stoppers 90 is a washer clamped between the first shank 11 and the second shank 12. The second bearing 70 is disposed within the second shank 12. The second handle body 12 is connected to the outer cutter tube 20. In this way, the second bearing 70 and the reciprocating swinging member 40 can be easily attached and detached.

Referring to fig. 3 and 4, in one embodiment, the other axial stop 90 is a boss, clip, etc. that is disposed around the inner wall of the second shank 12.

In some embodiments, the first handle 11 and the second handle 12 may be connected by, but not limited to, a threaded engagement, a snap fit, or other means of removable connection.

Referring to fig. 1-4, in one embodiment, a reciprocating saw system includes the reciprocating saw structure of any of the above embodiments, and further includes a power drive mechanism coupled to a power input 81.

In some embodiments, the power drive mechanism includes, but is not limited to, a motor or other power mechanism capable of driving the rotation of the eccentric shaft 80.

In the above reciprocating saw system, on one hand, when the reciprocating swinging member 40 swings reciprocally, the connecting sleeve 41 drives the cutter rod 52 to act, the cutter rod 52 correspondingly drives the saw head 51 to swing reciprocally, and the saw member 50 can rotate reciprocally stably under the supporting action of the supporting sleeve 30; on the other hand, when the connecting sleeve 41 and the cutter bar 52 are assembled, since the outer diameter of the supporting sleeve 30 is smaller than the inner diameter of the outer cutter tube 20, the outer cutter tube 20 can move relative to the supporting sleeve 30 along the axial direction, so that the proximal end of the cutter bar 52 is exposed, the connection operation of the proximal end of the cutter bar 52 and the connecting sleeve 41 can be facilitated, the assembling efficiency is high, the product qualification rate can be improved, the failure probability is reduced, and the stability and the safety are improved. In addition, when the connection operation of the proximal end of the cutter bar 52 with the connecting sleeve 41 is completed, the outer cutter tube 20 is moved to a predetermined position, and the distal section of the outer cutter tube 20 and the proximal end of the supporting sleeve 30 are connected and fixed. In addition, the outer diameter of the saw head 51 is not limited by the inner diameter of the outer cutter tube 20, and the outer diameter of the saw head 51 may be designed to be larger than the inner diameter of the outer cutter tube 20 so as to meet the cutting requirements of the tissue.

It should be noted that, the "saw head 51" may be a part of the "cutter bar 52", that is, the "saw head 51" and the other part of the "cutter bar 52" are integrally formed; or a separate component which is separable from the other part of the cutter bar 52, namely, the saw head 51 can be independently manufactured and then combined with the other part of the cutter bar 52 into a whole.

In the description of the present application, it should be understood that, if any, these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., are used herein with respect to the orientation or positional relationship shown in the drawings, these terms refer to the orientation or positional relationship for convenience of description and simplicity of description only, and do not indicate or imply that the apparatus or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the application.

Furthermore, the terms "first," "second," and the like, if any, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the terms "plurality" and "a plurality" if any, mean at least two, such as two, three, etc., unless specifically defined otherwise.

In the present application, unless explicitly stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly. For example, the two parts can be fixedly connected, detachably connected or integrated; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present application, unless expressly stated or limited otherwise, the meaning of a first feature being "on" or "off" a second feature, and the like, is that the first and second features are either in direct contact or in indirect contact through an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that if an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. If an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein, if any, are for descriptive purposes only and do not represent a unique embodiment.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the application, which are described in detail and are not to be construed as limiting the scope of the claims. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of protection of the present application is to be determined by the appended claims.

Claims (10)

1. A reciprocating saw structure, the reciprocating saw structure comprising:

A handle body;

the proximal end of the outer cutter tube is connected with the handle body;

The outer diameter of the supporting sleeve is smaller than the inner diameter of the outer cutter tube, so that the outer cutter tube moves relative to the supporting sleeve along the axial direction, and when the proximal end of the supporting sleeve moves to a preset position inside the outer cutter tube, the proximal end of the supporting sleeve is fixedly connected with the distal end of the outer cutter tube;

The reciprocating swinging piece is arranged in the handle body in a swinging way; and

The saw piece, saw the piece includes saw head and cutter arbor, the external diameter of saw head is greater than the internal diameter of outer sword pipe, the cutter arbor rotationally wears to locate in the outer sword pipe, saw head follow support the front end of cover stretch out and with the distal end of cutter arbor links to each other, the cutter arbor rotationally wears to locate in proper order support the cover with in the outer sword pipe, the proximal end of cutter arbor with reciprocating swinging member links to each other, synchronous drive when reciprocating swinging member swings the cutter arbor is around its central axis reciprocating swing.

2. The reciprocating saw structure according to claim 1, wherein a first spacing S1 is provided between a distal end face of said support sleeve and a proximal end face of said saw head, S1 being 1mm-10mm.

3. The reciprocating saw structure according to claim 1, wherein said reciprocating swinging member is provided with a connecting sleeve, and a proximal end of said cutter bar is coaxially connected to said connecting sleeve.

4. The reciprocating saw structure according to claim 3, further comprising a first bearing disposed inside the handle body, wherein the connecting sleeve is disposed through the first bearing, wherein the first bearing is located outside the outer cutter tube, and wherein a second space S2 is provided between the first bearing and a proximal end surface of the outer cutter tube.

5. The reciprocating saw structure according to claim 1, further comprising an eccentric shaft; the eccentric shaft is rotatably arranged in the handle body in a penetrating manner, and is provided with a power input end and a power output end which are oppositely arranged, wherein the power input end is used for being connected with the power driving mechanism; the reciprocating swinging piece is provided with a movable hole, the power output end penetrates through the movable hole, and the power output end can synchronously drive the reciprocating swinging piece to swing when moving.

6. The reciprocating saw structure according to claim 5, wherein said movable aperture is configured as a kidney-shaped aperture, said power take-off being movable along and rotatable within said kidney-shaped aperture.

7. The reciprocating saw structure according to claim 6, wherein said power take off is provided with a spherical bearing, said spherical bearing being in abutting engagement with a wall of said movable bore.

8. The reciprocating saw structure according to claim 5, wherein at least one second bearing is provided inside said shank, said eccentric shaft rotatably passing through said second bearing.

9. The reciprocating saw structure according to claim 8, wherein said shank body is further provided internally with two axial restraints on opposite sides of said second bearing, respectively.

10. The reciprocating saw structure according to claim 9, wherein said shank comprises a first shank and a second shank removably connected to said first shank, wherein one of said axial stop is a washer clamped between said first shank and said second shank, said second bearing being disposed inside said second shank; the reciprocating swinging piece is arranged in the second handle body in a swinging way, and the second handle body is connected with the outer cutter tube.