CN115105152B - Medical oscillating saw head - Google Patents

Abstract

The present invention discloses a medical oscillating saw head, comprising a head housing, a swing shaft and a reciprocating swing mechanism arranged in the head housing, wherein the reciprocating swing mechanism comprises an eccentric input assembly and a swing rod, wherein the eccentric input assembly comprises an eccentric shaft, wherein the eccentric shaft comprises an eccentric shaft body rotatable around a first axis and a driving part connected to the front end of the eccentric shaft body and eccentrically arranged with the first axis; the front end of the swing rod is connected to the swing shaft, and a driven part is arranged at the rear end, wherein the driven part and the driving part cooperate through a spherical pair, and the rotational motion of the eccentric shaft body is converted into the reciprocating swinging motion of the swing shaft through the driving part and the driven part. In the medical oscillating saw head of the present invention, through the sliding of the spherical pair and the up and down swinging of the second swing rod, the redundant combined forces in all directions except the horizontal swinging transmitted by the eccentric shaft are all resolved, thereby reducing unnecessary vibration and noise, and reducing heat generation.

Description

Medical oscillating saw head

Technical Field

The invention relates to the technical field of medical instruments, in particular to a medical oscillating saw head.

Background Art

In orthopedic surgery, a medical oscillating saw is a common tool for sawing bones. The medical oscillating saw is usually composed of a mobile phone, a handpiece and a saw blade assembly. A driving motor is arranged in the mobile phone. A swing shaft and a reciprocating swing mechanism are arranged in the handpiece. The reciprocating swing mechanism includes an eccentric shaft and a shift fork. One end of the eccentric shaft is connected to the output shaft of the driving motor, and the other end is provided with an active part eccentrically arranged with its rotation axis. One end of the shift fork is connected to the swing shaft, and the other end is provided with a fork-shaped driven part. The active part is stuck in the driven part, and the outer side surface of the active part is in active contact with the inner side surface of the driven part. The rotational motion is converted into reciprocating swing motion through the eccentric shaft and the shift fork. This kind of reciprocating swing mechanism, because the active part of the eccentric shaft and the driven part of the shift fork are rigidly matched, during the high-speed operation of the eccentric shaft, the vibration is large, the operating noise is high, and the heat is severe. It is not convenient to work continuously for a long time, and the sawing shaking is large. If it is adapted to a saw blade with a sheath, its advantage of precise sawing cannot be effectively exerted.

Summary of the invention

In view of the above-mentioned status of the prior art, the technical problem to be solved by the present invention is to provide a medical oscillating saw handpiece to reduce the interference of adverse factors such as vibration, noise and heat of the handpiece under high-speed operation, so that the doctor can use the handpiece more smoothly, with less noise and less heat, thereby improving the doctor's experience of the product.

In order to solve the above technical problems, the present invention provides a medical oscillating saw head, comprising: a head housing, a swing shaft and a reciprocating swing mechanism arranged in the head housing, the reciprocating swing mechanism comprising an eccentric input assembly and a swing rod, the eccentric input assembly comprising an eccentric shaft, the eccentric shaft comprising an eccentric shaft body rotatable around a first axis and a driving part connected to the front end of the eccentric shaft body and eccentrically arranged with the first axis; the front end of the swing rod is connected to the swing shaft, and the rear end is provided with a driven part, the driven part and the driving part are matched by a spherical pair, and the rotational motion of the eccentric shaft body is converted into the reciprocating swinging motion of the swing shaft through the driving part and the driven part.

The medical oscillating saw head of the present invention has a spherical pair connected to the swing arm and the driving part. The spherical pair connection allows the two to slide relative to each other at any angle under the action of the eccentric shaft and maintain a reliable and stable connection, that is, stable spherical contact, which allows the eccentric shaft to maintain sufficient freedom when moving, without causing relative impact between the two, and ensures relatively smooth sliding of the two.

In one of the embodiments, the driven part is provided with a spherical groove, the outer side wall of the driving part is spherical, and the inner side wall of the spherical groove and the outer side wall of the driving part together constitute the spherical pair.

In one of the embodiments, a heat dissipation groove is provided on the inner side wall of the spherical groove.

In one of the embodiments, the heat dissipation grooves include axial heat dissipation grooves extending in the axial direction and radial heat dissipation grooves extending in the circumferential direction, and the axial heat dissipation grooves are connected to the radial heat dissipation grooves.

In one of the embodiments, a heat dissipation hole communicating with the heat dissipation groove is provided on the driven part.

In one embodiment, the driving part includes a core shaft and a spherical bearing sleeved on the core shaft, the central axis of the core shaft is eccentrically arranged relative to the first axis, and the outer side wall of the outer ring of the spherical bearing is spherical.

In one embodiment, the rocker arm includes a first rocker arm and a second rocker arm, the front end portion of the first rocker arm is coaxially and fixedly connected to the rocker shaft, the rear end portion of the first rocker arm is connected to the front end portion of the second rocker arm, and the second rocker arm has a rotational freedom around a second axis, the second axis is located in the rocking plane of the first rocker arm and is perpendicular to the axis of the first rocker arm, and the driven portion is arranged at the rear end portion of the second rocker arm.

In one embodiment, the rear end of the first swing rod and the front end of the second swing rod are connected via a rotation shaft extending along the second axis.

In one of the embodiments, a U-shaped slot is provided on one of the rear end portion of the first swing arm and the front end portion of the second swing arm, and a clamping head is provided on the other of the rear end portion of the first swing arm and the front end portion of the second swing arm, and the clamping head is located in the slot, and the rotating shaft passes through the rear two ends of the clamping head and is respectively fixed on the two slot walls of the U-shaped slot.

In one of the embodiments, a sliding sleeve is sleeved in the shaft hole of the chuck, and the rotating shaft is inserted into the sliding sleeve and is loosely matched with the sliding sleeve.

In one of the embodiments, a cap portion is provided at the rear end of the rotating shaft, and a mounting hole extending radially is provided at the front end. The front end of the rotating shaft passes through a side wall of the slot, a clamping head, and another side wall of the slot in sequence, and is then locked by the cap portion and an elastic bayonet pin passing through the mounting hole.

In one embodiment, the second swing rod has a translational freedom along a second axis, and an elastic component is provided between a rear end portion of the first swing rod and a front end portion of the second swing rod.

The beneficial effects of the additional technical features of the present invention will be described in the specific implementation section of this specification.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a cross-sectional view of a medical oscillating saw according to an embodiment of the present invention;

FIG2 is a perspective view of the medical oscillating saw head shown in FIG1;

FIG3 is a top view of the medical oscillating saw head shown in FIG1 ;

Fig. 4 is a cross-sectional view along line A-A in Fig. 3;

FIG5 is a front view of the medical oscillating saw head shown in FIG1;

Fig. 6 is a cross-sectional view along line C-C in Fig. 5;

FIG7 is a partial enlarged schematic diagram of point B in FIG6;

FIG8 is a partial enlarged schematic diagram of point B1 in FIG7;

FIG9 is a front view of the eccentric input assembly of the medical oscillating saw handpiece shown in FIG1 ;

FIG10 is a cross-sectional view of the eccentric input assembly shown in FIG9;

11 and 12 are three-dimensional views of the first swing rod in different directions;

FIG13 is a perspective view of the first swing arm of the medical swing saw head shown in FIG1;

FIG14 is a perspective view of the rotating shaft of the medical oscillating saw head shown in FIG1;

Figures 15-17 are schematic diagrams of the cooperation between the spherical bearing and the first rocker arm, wherein Figure 15 shows the state where the core shaft of the eccentric shaft rotates to the middle, Figure 16 shows the state where the core shaft of the eccentric shaft rotates to the bottom; and Figure 17 shows the state where the core shaft of the eccentric shaft rotates to the top.

Description of reference numerals: 1, sheath saw blade; 2, machine head; 21, machine head housing; 211, first housing; 212, second housing; 22, swing shaft; 221, drive pin; 23, eccentric input assembly; 230, eccentric shaft; 231, eccentric shaft body; 232, input interface; 233, mandrel; 234, spherical bearing; 234a, outer side wall; 235, first bearing; 236, second bearing; 237, sleeve; 237a, mounting interface; 24, first swing rod; 241, flat hole; 242, clamp; 243, shaft hole; 2 44. First mounting groove; 25. Second rocker arm; 251. Driven part; 251a. Spherical groove; 251b. Radial heat dissipation groove; 251c. Axial heat dissipation groove; 251d. Heat dissipation hole; 252. Slot; 253. Second mounting groove; 26. Rotating shaft; 261. Cap; 262. Mounting hole; 27. Elastic bayonet; 28. Sliding sleeve; 291. Elastic washer; 292. First gasket; 293. Second gasket; 3. Mobile phone; 31. Mobile phone housing; 32. Driving motor; 321. Output shaft; 322. Output interface.

DETAILED DESCRIPTION

In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and understandable, the specific implementation methods of the present invention are described clearly and completely below in conjunction with the accompanying drawings. Obviously, the specific details described below are only part of the embodiments of the present invention, and the present invention can also be implemented in many other embodiments different from those described herein. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the protection scope of the present invention.

In this document, when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time. The directional words such as front, back, top, and bottom involved are defined by the positions of the parts in the drawings and the positions of the parts relative to each other, just for the clarity and convenience of expressing the technical solution. It should be understood that the use of the directional words should not limit the scope of protection requested in this application.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

As shown in FIG1 , the medical oscillating saw in the embodiment of the present invention comprises a mobile phone 3, a handpiece 2 and a sheath saw blade 1, wherein the mobile phone 3 comprises a mobile phone housing 31 approximately in the shape of a pistol and a driving motor 32 disposed in the mobile phone housing 31, the driving motor 32 having an output shaft 321 extending in the axial direction, and an output interface 322 is disposed at the front end of the output shaft 321. The handpiece 2 comprises a handpiece housing 21, a swing shaft 22 disposed in the handpiece housing 21 and a reciprocating deflection mechanism, and a handpiece interface is disposed on the swing shaft 22. The reciprocating deflection mechanism is used to convert the rotational motion of the output shaft 321 into the rotational reciprocating swinging motion of the swing shaft 22. The sheath saw blade 1 comprises a saw blade body and a sheath, and a saw blade interface is disposed at the rear end of the saw blade body, and the saw blade interface is connected to the handpiece interface. During operation, the handpiece 2 drives the saw blade body to swing, thereby driving the saw teeth to swing to form sawing.

As shown in Figs. 2, 3 and 4, the machine head housing 21 includes a first shell 211 and a second shell 212. The center line of the first shell 211 is perpendicular to the center line of the second shell 212, and the second shell 212 is connected to the front end of the first shell 211. The swing shaft 22 is arranged in the second shell 212 so as to be reciprocatingly swingable around the swing axis. The upper end of the swing shaft 22 is provided with a machine head interface that cooperates with the saw blade interface. The machine head interface in this embodiment includes a plurality of driving pins 221 arranged at intervals along the circumferential direction and arranged at the upper end of the swing shaft 22. The reciprocating deflection mechanism is located in the first shell 211, and the reciprocating deflection mechanism includes an eccentric input assembly 23, a first swing rod 24 and a second swing rod 25.

As shown in Figures 4, 6, 9 and 10, the eccentric input assembly 23 includes an eccentric shaft 230, the eccentric shaft 230 includes an eccentric shaft body 231 that can rotate around the first axis X1, an input interface 232 arranged at the rear end of the eccentric shaft body 231, and a driving part connected to the front end of the eccentric shaft body 231, the input interface 232 cooperates with the output interface 322 on the output shaft 321, and the central axis of the driving part is eccentrically arranged with the first axis X1. The front end of the first swing rod 24 is coaxially fixedly connected to the swing shaft 22, and the first swing rod 24 can swing around the swing axis. Specifically, the front end of the first swing rod 24 is provided with a flat hole 241 (see Figure 13), the outer side wall of the swing shaft 22 is flat (see Figure 6), and the front end of the first swing rod 24 is sleeved on the swing shaft 22 to achieve coaxial fixed connection. The rear end of the first rocker arm 24 is connected to the front end of the second rocker arm 25, and the second rocker arm 25 has a rotational freedom along a second axis X2, the second axis X2 is located in the swing plane of the first rocker arm 24 and is perpendicular to the axis of the first rocker arm 24, and a driven part 251 is provided at the rear end of the second rocker arm 25, and the driven part 251 is matched with the driving part through a spherical pair.

The reciprocating yaw mechanism of the present invention has a second swing rod 25 with rotational freedom, and the second swing rod 25 is connected to the driving part through a spherical pair. The spherical pair connection allows the two to slide relative to each other at any angle under the action of the eccentric shaft 230 and maintain a reliable and stable connection, that is, stable spherical contact. The eccentric shaft 230 can maintain sufficient freedom when moving, preventing the two from having relative impact, and can also ensure relatively smooth sliding of the two.

As shown in Figures 11 and 12, the driven part 251 is provided with a spherical groove 251a as an example, the outer side wall of the driving part is a spherical surface, and the inner side wall of the spherical groove 251a and the outer side wall of the driving part together constitute the spherical surface pair. As an alternative, the spherical groove 251a can also be provided on the driving part, and the driven part 251 is provided with a spherical outer side wall that matches the inner side wall of the spherical groove 251a.

As an example, the inner wall of the spherical groove 251a is provided with heat dissipation grooves 251b and 251c. The heat dissipation grooves 251b and 251c can reduce the spherical contact area between the inner wall of the spherical groove 251a and the outer wall 234a of the spherical bearing 234, and transform the high-pair contact of the two spherical surfaces into a low-pair contact with less friction, which is beneficial to heat dissipation. Moreover, placing heat-resistant solid lubricating oil or grease in the heat dissipation grooves 251b and 251c can effectively increase the matching and sliding performance of the two spherical surfaces. In order to increase the heat dissipation effect, the heat dissipation grooves 251b and 251c include an axial heat dissipation groove 251c extending in the axial direction and a radial heat dissipation groove 251b extending in the circumferential direction, and the axial heat dissipation groove 251c is connected to the radial heat dissipation groove 251b. In order to further increase the heat dissipation effect, the driven part 251 is provided with a heat dissipation hole 251d connected to the heat dissipation grooves 251b and 251c.

As shown in Fig. 9 and Fig. 10, the driving part as an example includes a core shaft 233 and a spherical bearing 234 sleeved on the core shaft 233. The center line of the core shaft 233 is eccentrically arranged relative to the first axis X1, and the outer side wall 234a of the outer ring of the spherical bearing 234 is a spherical surface. The driving part adopts this structure, and the spherical outer side wall 234a and the inner groove wall of the spherical groove 251a are rolling friction, which is smaller than the sliding friction of the core shaft 233 directly contacting the driven part 251.

As shown in Figs. 9 and 10, the eccentric input assembly 23 as an example further includes a first bearing 235 and a second bearing 236 sleeved on the front and rear ends of the eccentric shaft body 231, and the first bearing 235 and the second bearing 236 are used to support the eccentric shaft 230. Preferably, the eccentric input assembly 23 further includes a sleeve 237, the front end of the sleeve 237 is inserted and fixed in the rear end of the first shell 211, and the rear end of the sleeve 237 is provided with a mounting interface 237a. The mobile phone 3 is provided with a mobile phone interface (see Fig. 1) that matches the mounting interface 237a. When installing, the mounting interface 237a is inserted into the mobile phone interface, and the input interface 232 of the eccentric shaft 230 is connected to the output interface 322 of the output shaft 321 of the drive motor 32.

As shown in FIGS. 7 and 8 , the rear end of the first swing rod 24 and the front end of the second swing rod 25 are connected by a rotating shaft 26 extending along the second axis X2. Specifically, a U-shaped slot 252 (see FIGS. 11 and 12 ) is provided on the front end of the second swing rod 25, and a clamping head 242 (see FIG. 13 ) is provided on the rear end of the first swing rod 24. The clamping head 242 is provided with an axial hole 243. After the rotating shaft 26 passes through the axial hole 243, the two ends are respectively fixed on the two groove walls of the slot 252. As an alternative, the positions of the slot 252 and the clamping head 242 can be swapped, that is, the slot 252 is provided on the rear end of the first swing rod 24, and the clamping head 242 is provided on the front end of the second swing rod 25.

As shown in Figure 14, the rear end of the rotating shaft 26 is provided with a cap portion 261, and the front end is provided with a mounting hole 262 extending radially. The front end of the rotating shaft 26 passes through a groove wall of the slot 252, the clamping head 242, and the other groove wall of the slot 252 in sequence, and is locked by the cap portion 261 and the elastic clamping pin 27 passing through the mounting hole 262.

As shown in FIG8 , preferably, a sliding sleeve 28 is sleeved in the shaft hole 243 of the chuck 242 , and the rotating shaft 26 is passed through the sliding sleeve 28 and is loosely matched with the sliding sleeve 28 . The sliding sleeve 28 can be made of wear-resistant material (such as copper) to increase its service life.

Preferably, an elastic component is provided between the rear end of the first swing rod 24 and the front end of the second swing rod 25. The elastic component can reduce vibration and noise, make the transmission of the swinging motion more flexible, and reduce the undesirable situation that the parts of the machine head 2 and the saw blade are damaged due to excessive instantaneous load. As shown in FIG8 , the elastic component as an example includes an elastic washer 291 on the rotating shaft 26 sleeved between the two side surfaces of the clamping head 242 and the two groove walls of the clamping groove 252. Preferably, the elastic washer 291 is a disc spring. In the process of the second swing rod 25 driving the first swing rod 24 to swing left and right, the elastic washer 291 is used to convert the instantaneous rigid force transmitted by the second swing rod 25 into an elastic deformation force, and then convert the elastic deformation force into the swinging motion of the swing shaft 22 and the saw blade. The conversion of this structure can effectively reduce the instantaneous load and impact during high-speed and high-frequency left and right swinging, reduce vibration and noise, make the transmission of the swinging motion more flexible, and reduce the undesirable situation that the parts of the machine head 2 and the saw blade are damaged due to excessive instantaneous load.

Preferably, the elastic component further includes a first gasket 292 and a second gasket 293 sleeved on the swing core shaft 233 on both sides of the elastic gasket 291. The first gasket 292 and the second gasket 293 can increase the elastic force on one hand, and reduce the wear of the elastic gasket 291 on the other hand. Preferably, a first mounting groove 244 is provided on both side surfaces of the clamp head 242, and a second mounting groove 253 is provided on the two groove walls of the U-shaped clamping groove 252, and the first gasket 292 and the second gasket 293 are respectively installed in the first mounting groove 244 and the second mounting groove 253. The first gasket 292 and the second gasket 293 can be made of hardened wear-resistant rubber, PC and other polymer materials; the elastic gasket 291 can be made of a stainless steel spring or disc spring with a surface flexible coating treatment such as rubber or surface sprayed rubber.

As shown in Figures 16-17, when the eccentricity of the eccentric shaft 230 moves from zero to the maximum eccentricity position, due to the limiting reaction of the first swing rod 24, the rotating shaft 26, the first gasket 292, the second gasket 293 and the elastic washer 291 in the horizontal direction, the spherical bearing 234 on the eccentric shaft 230 exerts a force to swing left and right in the horizontal direction through the spherical pair; at the same time, the second swing rod 25 continuously swings up and down with the sliding sleeve 28 (rotating shaft 26) installed on the rotating shaft 26 as the center under the continuous change of the eccentricity of the eccentric shaft 230. At this time, the inner spherical surface of the second swing rod 25 and the outer spherical surface of the spherical bearing 234 form a spherical pair and slide flexibly. Through the sliding of the spherical pair and the up and down swinging of the second swing rod 25, the redundant combined forces in all directions except the horizontal swinging transmitted by the eccentric shaft 230 are all resolved, thereby reducing unnecessary vibration and noise.

Moreover, when the eccentricity of the eccentric shaft 230 moves from zero to the maximum eccentricity position, the second swing arm 25 is squeezed along one side of the rotating shaft 26 in the horizontal direction under the sliding cooperation of the spherical bearing 234. At this time, the cooperating inner surface of one side of the second swing arm 25 compresses the elastic gasket 291 through the second gasket 293, and further compresses the first gasket 292, so that the first swing arm 24 swings to one side, realizing a swing of the swing shaft 22, thereby driving the saw blade body installed on the swing shaft 22 to swing and saw in a single direction; when the eccentric shaft 230 rotates to another direction, the second swing arm 25 is squeezed to the other side, thereby further driving the swing shaft 22 and the saw blade body to saw in the opposite direction, thereby completing a complete sawing cycle. During the left-right swinging of the first swing arm 24 driven by the second swing arm 25, the instantaneous rigid force transmitted from the swing shaft 22 is converted into elastic deformation force through the action of the first gasket 292, the second gasket 293 and the elastic gasket 291, and then the elastic deformation force is converted into the swinging motion of the swing shaft 22 and the saw blade body. The conversion of this structure can effectively reduce the instantaneous load and impact during the high-speed and high-frequency left-right swinging, reduce vibration and noise, make the transmission of the swinging motion more flexible, and reduce the undesirable situation that the parts of the machine head 2 and the saw blade are damaged due to excessive instantaneous load.

The above-mentioned embodiments only express several implementation methods of the present invention, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims (11)

1. A medical oscillating saw head, characterized in that it comprises: A machine head housing, a swing shaft and a reciprocating swing mechanism arranged in the machine head housing, wherein the reciprocating swing mechanism comprises an eccentric input assembly and a swing rod, wherein the eccentric input assembly comprises an eccentric shaft, and the eccentric shaft comprises an eccentric shaft body rotatable about a first axis and a driving part connected to a front end of the eccentric shaft body and eccentrically arranged with respect to the first axis; The front end of the swing rod is connected to the swing shaft, and the rear end is provided with a driven part, the driven part and the driving part are matched through a spherical pair, and the rotational motion of the eccentric shaft body is converted into a reciprocating swinging motion of the swing shaft through the driving part and the driven part; The rocker arm includes a first rocker arm and a second rocker arm, the front end portion of the first rocker arm is coaxially and fixedly connected to the rocker shaft, the rear end portion of the first rocker arm is connected to the front end portion of the second rocker arm, and the second rocker arm has a rotational freedom around a second axis, the second axis is located in the rocking plane of the first rocker arm and is perpendicular to the axis of the first rocker arm, and the driven portion is arranged at the rear end portion of the second rocker arm. 2. The medical oscillating saw head according to claim 1, characterized in that the driven part is provided with a spherical groove, the outer side wall of the driving part is spherical, and the inner side wall of the spherical groove and the outer side wall of the driving part together constitute the spherical pair. 3. The medical oscillating saw head according to claim 2, characterized in that a heat dissipation groove is provided on the inner side wall of the spherical groove. 4. The medical oscillating saw head according to claim 3, characterized in that the heat dissipation groove comprises an axial heat dissipation groove extending in the axial direction and a radial heat dissipation groove extending in the circumferential direction, and the axial heat dissipation groove is connected to the radial heat dissipation groove. 5 . The medical oscillating saw head according to claim 3 , wherein the driven part is provided with a heat dissipation hole connected with the heat dissipation groove. 6. The medical oscillating saw head according to claim 1 is characterized in that the driving part includes a core shaft and a spherical bearing sleeved on the core shaft, the central axis of the core shaft is eccentrically arranged relative to the first axis, and the outer side wall of the outer ring of the spherical bearing is spherical. 7. The medical oscillating saw head according to claim 1, characterized in that the rear end of the first swing arm and the front end of the second swing arm are connected by a rotating shaft extending along the second axis. 8. The medical oscillating saw head according to claim 7 is characterized in that a U-shaped slot is provided on one of the rear end portion of the first swing arm and the front end portion of the second swing arm, and a clamping head is provided on the other of the rear end portion of the first swing arm and the front end portion of the second swing arm, the clamping head is located in the slot, and the rotating shaft passes through the rear two ends of the clamping head and is respectively fixed on the two slot walls of the U-shaped slot. 9. The medical oscillating saw head according to claim 8, characterized in that a sliding sleeve is sleeved in the shaft hole of the clamping head, and the rotating shaft is inserted into the sliding sleeve and is loosely matched with the sliding sleeve. 10. The medical oscillating saw head according to claim 7 is characterized in that a cap is provided at the rear end of the rotating shaft, and a mounting hole extending radially is provided at the front end, and the front end of the rotating shaft passes through one side wall of the slot, the clamping head, and the other side wall of the slot in sequence, and is then locked by the cap and an elastic bayonet pin passing through the mounting hole. 11. The medical oscillating saw head according to any one of claims 1 to 10, characterized in that the second swing arm has translational freedom along a second axis, and an elastic component is provided between the rear end of the first swing arm and the front end of the second swing arm.