K-wire holding device and drilling device

Abstract

A Kirschner wire clamping device is provided, comprising a housing and a motor, a gear set, and a chuck mechanism arranged in the housing, wherein the gear set is connected to the driving shaft of the motor and the chuck mechanism comprises a first sleeve connected to the gear set and having a front end and a rear end; a second sleeve sleeved in the first sleeve and matched with the conical surface of the first sleeve, and the second sleeve has a first end and a second end, the Kirschner wire is inserted into the second sleeve and extends through the first end of the second sleeve and extends out of the front end of the first sleeve, and the second end of the second sleeve extends out of the rear end of the first sleeve; and a nut, which is separated from the first sleeve and arranged at the rear end of the first sleeve, and the second end of the second sleeve is screwed into the nut. A Kirschner wire drilling device is also provided, comprising the above-mentioned Kirschner wire clamping device and a pushing device, wherein the pushing device is connected to the Kirschner wire clamping device and applies a thrust to the Kirschner wire clamping device.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a Kirschner wire clamping device and a Kirschner wire drilling device having the Kirschner wire clamping device. Background Art

[0002] In bone tissue surgery, Kirschner wires are often used to locate bone tissue. Kirschner wires are small in diameter and long in length. Generally, the diameter does not exceed 4mm and the length can reach more than 200mm. Therefore, the Kirschner wire needs to be clamped on the electric drilling device through a special clamping device. When drilling, the Kirschner wire extends a certain length from the front end of the clamping device. After drilling to a certain depth, the clamping device is released to allow more length of the Kirschner wire to extend from the front end of the clamping device. Then the Kirschner wire is re-clamped and drilled to a certain depth. This is repeated until the Kirschner wire reaches the required depth.

[0003] Regarding the Kirschner wire clamping device, Chinese utility model application CN206333956U discloses a Kirschner wire chuck device, which uses a spring jacket and a jacket outer sleeve with a conical surface, and uses a pull pressure rod to clamp the Kirschner wire inserted in the spring jacket. When the pull pressure rod is pulled, the pull pressure rod drives the jacket outer sleeve to move, and the spring jacket is contracted by the conical surface to clamp the Kirschner wire. When the pull pressure rod is released, the spring is reset to release the Kirschner wire. When the operator operates the drilling device with the above-mentioned Kirschner wire clamping device, the operator needs to manually pull the pull pressure rod to clamp the Kirschner wire.

[0004] However, manually clamping the Kirschner wire often cannot accurately control the clamping force of the Kirschner wire. Over-tightening or over-exerting the clamping force will affect the surgical effect of bone tissue surgery, and manually clamping the Kirschner wire cannot guarantee a constant clamping force during drilling. Since the Kirschner wire rotates at high speed during drilling, any instantaneous change in the clamping force will apply an instantaneous lateral torque to the high-speed rotating Kirschner wire, and this lateral torque, even if small, will have a negative impact on the high-speed rotating Kirschner wire and even cause the Kirschner wire to break. In addition, it is also challenging to achieve automatic clamping of the Kirschner wire in the small internal space of the Kirschner wire clamping device.

[0005] Therefore, there is a need for a clamping device that can automatically clamp the Kirschner wire, accurately grasp the clamping force of the Kirschner wire, and maintain a certain clamping force when the Kirschner wire rotates at high speed, which is easy to clamp and release the Kirschner wire. Summary of the invention

[0006] Since the existing Kirschner wire clamping devices have various problems as described above, an object of the present invention is to provide an improved Kirschner wire clamping device that can improve one or more problems of the existing Kirschner wire clamping devices.

[0007] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, there is provided a Kirschner wire clamping device, which comprises a housing and a motor, a gear set, and a chuck mechanism arranged in the housing, wherein the gear set is connected to the driving shaft of the motor; and the chuck mechanism comprises: a first sleeve, connected to the gear set and having a front end and a rear end; a second sleeve, sleeved in the first sleeve and matched with the conical surface of the first sleeve, and the second sleeve has a first end and a second end, the Kirschner wire is inserted into the second sleeve and extends through the first end of the second sleeve and extends out of the front end of the first sleeve, and the second end of the second sleeve extends out of the rear end of the first sleeve; and a nut, which is separately arranged at the rear end of the first sleeve from the first sleeve, and the second end of the second sleeve is screwed into the nut.

[0008] According to one or more embodiments of the Kirschner wire clamping device of the present invention, the gear set includes a first gear, a second gear and a third gear that are meshed in sequence, the first gear is connected to the driving shaft of the motor, and the third gear is connected to the first sleeve.

[0009] According to the Kirschner wire clamping device of one or more embodiments of the present invention, the number of teeth of the second gear is greater than the number of teeth of the first gear, and the number of teeth of the third gear is greater than the number of teeth of the first gear.

[0010] According to one or more embodiments of the Kirschner wire clamping device of the present invention, the clamping mechanism further includes a positioning member, the positioning member includes a positioning pin arranged on the outer peripheral surface of the second sleeve and a positioning groove formed on the inner peripheral surface of the first sleeve, and the positioning pin extends into the positioning groove.

[0011] According to one or more embodiments of the Kirschner wire clamping device of the present invention, the chuck mechanism further includes a limiting mechanism, the limiting mechanism includes a limiting column arranged on the shell and partially extending into the shell, and a limiting groove formed on the outer peripheral surface of the nut, wherein the limiting column is switchable between a first position and a second position, the limiting column disengages from the limiting groove at the first position, and snaps into the limiting groove at the second position.

[0012] According to the K-wire clamping device of one or more embodiments of the present invention, the inner circumferential surface of the first sleeve is at least partially formed as a conical surface that tapers from the front end of the first sleeve toward the rear end of the first sleeve.

[0013] According to one or more embodiments of the Kirschner wire clamping device of the present invention, the chuck mechanism further includes a conical sleeve, which is arranged at the front end of the first sleeve and clamped between the first sleeve and the second sleeve, wherein the inner circumferential surface of the conical sleeve is formed as a conical surface that tapers from the front end of the first sleeve toward the rear end of the first sleeve.

[0014] According to another aspect of the present invention, a Kirschner wire drilling device is provided, comprising: a Kirschner wire clamping device as described in one or more embodiments of the present invention; and a pushing device connected to the Kirschner wire clamping device to apply a pushing force to the Kirschner wire clamping device.

[0015] According to one or more embodiments of the present invention, the K-wire drilling device further comprises a pressure sensing device, wherein the sensing device is disposed between the K-wire clamping device and the pusher.

[0016] According to one or more embodiments of the Kirschner wire drilling device of the present invention, the arched bracket further includes an arched bracket having a first end and a second end, the first end of the arched bracket being connected to the shell of the Kirschner wire clamping device, and an opening being formed on the second end of the arched bracket, and the opening being aligned with the front end of the first sleeve of the Kirschner wire clamping device.

[0017] The beneficial effects of the present invention are at least that by using the cooperation of the motor and the gear set and by gradually clamping the Kirschner wire inserted between the second sleeve through the cone cooperation between the first sleeve and the second sleeve, more precise control can be provided for the clamping of the Kirschner wire, and automatic clamping of the Kirschner wire is achieved in the compact space of the Kirschner wire clamping device; the clamping force applied to the Kirschner wire is maintained by a nut located at the rear end of the first sleeve, into which one end of the second sleeve is screwed, so that a constant clamping force can be maintained when the Kirschner wire rotates at high speed for bone tissue surgery, thereby avoiding the negative impact on the Kirschner wire caused by changes in the clamping force. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A three-dimensional schematic diagram of a Kirschner wire clamping device according to one embodiment of the present invention is shown;

[0019] Figure 2 An exploded view of a Kirschner wire holding device according to one embodiment of the present invention is shown;

[0020] Figure 3 Shows Figure 2 A cross-sectional view of a K-wire holding device is shown;

[0021] Figure 4 Shows Figure 2 A cross-sectional view of the Kirschner wire clamping device in another direction;

[0022] Figure 5A A schematic diagram showing a limiting column in a Kirschner wire clamping device according to an embodiment of the present invention is shown;

[0023] Figure 5B A schematic diagram showing a nut in a Kirschner wire clamping device according to one embodiment of the present invention;

[0024] Figure 6 A schematic diagram showing a second sleeve in a Kirschner wire clamping device according to one embodiment of the present invention;

[0025] Figure 7 An exploded view of a Kirschner wire drilling device according to one embodiment of the present invention is shown;

[0026] Figure 8 Shows Figure 7 Exploded view of a cross-section of a Kirschner wire drilling device. DETAILED DESCRIPTION

[0027] The following will describe specific embodiments of the present invention in conjunction with the accompanying drawings, some of which are shown in the attached drawings. It should be understood that the embodiments shown in the drawings are only exemplary and should not be regarded as limiting the present invention.

[0028] See also Figure 1 , Figure 1 A schematic perspective view of a Kirschner wire clamping device 100 according to one embodiment of the present invention is shown. The clamping device 100 includes a housing 110 for accommodating various components of the clamping device 100 to be described below, wherein a Kirschner wire 120 extends out of the housing 110 from an opening at the front end of the housing 110 for performing bone tissue surgery. The clamping structure for clamping the Kirschner wire in the clamping device 100 will be described in detail below.

[0029] Please continue to see Figures 2 to 4 , Figures 2 to 4 The clamping mechanism 200 in the clamping device 100 is shown in an exploded view, a perspective schematic view and a cross-sectional view respectively. For the sake of clarity, the housing 110 surrounding the clamping mechanism 200 is omitted.

[0030] like Figure 2As shown, the clamping mechanism 200 mainly includes a motor 210, a gear set 220, a chuck mechanism 230 and a frame 240. The frame 240 also has a cover 241, and the gear set 220 and the chuck mechanism 230 are arranged in a space defined by the frame 240 and the cover 241. The driving shaft 211 of the motor 210 is connected to the gear set 220, and the gear set 220 is further connected to the chuck mechanism 230. In this way, the gear set 220 transmits the output from the driving shaft 211 to the chuck mechanism 230 to drive the chuck mechanism 230 to rotate.

[0031] In one embodiment, the gear set 220 includes a first gear 221, a second gear 222, and a third gear 223 that are meshed in sequence, wherein the first gear 221 is connected to the drive shaft 211, and the third gear 223 is connected to the chuck mechanism 230. In this way, the drive shaft 211 drives the first gear 221 to rotate, and through the meshing transmission of the first gear 221, the second gear 222, and the third gear 223, the first gear 221 drives the third gear 223 to rotate through the second gear 222, and then drives the chuck mechanism 230 to rotate through the third gear 223.

[0032] In some embodiments, the first gear 221, the second gear 222 and the third gear 223 have different gear radii, that is, the first gear 221, the second gear 222 and the third gear 223 have different numbers of teeth, and preferably the number of teeth of the second gear 222 is greater than the number of teeth of the first gear 221, and the number of teeth of the third gear 223 is greater than the number of teeth of the first gear 221. In this way, through the meshing transmission of the gear set 220, the output from the drive shaft 211 can be decelerated by the second gear 222 and the third gear 223, so that the decelerated rotation is transmitted to the chuck mechanism 230. In some embodiments, the first gear 221 should be as few as possible, which can reduce the inertia generated by the first gear 221 itself when the drive shaft 211 drives the first gear 221 to rotate. Therefore, the rotation of the chuck mechanism 230 can be controlled in a more precise manner, so as to control the clamping force of the chuck mechanism 230 on the Kirschner wire 120 in a more precise manner. In some other embodiments, the gear set 220 may have more than three gears so that the rotation from the drive shaft 211 can be further reduced by more gears, or the rotation from the drive shaft 211 can be transmitted to a position farther away from the drive shaft 211 to provide more precise control.

[0033] See also Figure 3 , Figure 3 FIG. 2 shows a cross-sectional view of the clamping device 200 in the XZ plane. Figure 2 and Figure 3The chuck mechanism 230 includes a first sleeve 231, a second sleeve 232 and a nut 233. The outer circumference of the first sleeve 231 is connected to the third gear 223, so that the first sleeve 231 can be rotated by the drive of the third gear 223. Optionally, the outer circumference of the first sleeve 231 can also be connected to the frame 240 through a bearing 234, so that the first sleeve 231 can be maintained at a corresponding position in the frame 240 and rotated by the drive of the third gear 223. The second sleeve 232 is sleeved in the first sleeve 231, and the Kirschner wire 120 is inserted into the second sleeve 232. In this embodiment, the Kirschner wire 120 is toward the front end of the second sleeve 232 (that is, Figure 3 The left end of the second sleeve 232 in the sleeve 230 extends from the front end of the first sleeve 231 (ie, Figure 3 In other words, the Kirschner wire 120 is inserted into the second sleeve 232 from the front end of the second sleeve 232 through the front end of the first sleeve 231. The first sleeve 231 and the second sleeve 232 are tapered to each other, so that when the second sleeve 232 is displaced relative to the first sleeve 231, the second sleeve 232 applies circumferential pressure to the Kirschner wire 120 therein through the tapered fit, so that the Kirschner wire 120 is clamped in the second sleeve 232. In some embodiments, as Figure 3 As shown, the conical surface fit is achieved by a conical surface sleeve 235 sleeved on the front end of the first sleeve 231. The conical surface sleeve 235 is sandwiched between the first sleeve 231 and the second sleeve 232, and the inner circumference of the conical surface sleeve 235 is formed so that the front end of the first sleeve 231 faces the rear end of the first sleeve 232 (i.e., Figure 3 In this way, when the second sleeve 232 is displaced relative to the first sleeve 231, especially when the second sleeve 232 moves toward the rear end of the first sleeve 231, the second sleeve 232 (for example, the front end of the second sleeve 232) is squeezed by the conical inner circumference of the tapered sleeve 235 to clamp the Kirschner wire 120 in the second sleeve 232. In some embodiments, the outer circumference of the front end of the second sleeve 232 can also be formed into a cone, so as to adapt to the conical inner circumference of the tapered sleeve 235, which can further improve the uniformity of the pressure applied by the second sleeve 232 to the Kirschner wire 120.

[0034] In some embodiments, the conical sleeve 235 may not be provided. Instead, the inner circumferential surface of the front end of the first sleeve 231 (eg Figure 3The portion in contact with the conical sleeve 235) is directly formed into a conical shape like the conical inner circumference of the conical sleeve 235, which can also achieve the application of pressure to the second sleeve 232 and then to the Kirschner wire 120. However, for the embodiment using a separate conical sleeve 235, the advantage is that a conical sleeve 235 with a conical inner circumference with different cone angles can be used, so that the pressure applied by the first sleeve 231 to the second sleeve 232 and then to the Kirschner wire 120 per unit displacement length can be adjusted according to different situations, and different materials can be used to form the conical sleeve 235 and the first sleeve 231. For example, in some embodiments, compared with the first sleeve 231, the conical sleeve 235 can be made of a material that generates lower friction with the second sleeve 232, so that the locking resistance of the second sleeve 232 can be reduced, for example, by 20%.

[0035] How to achieve the relative displacement between the first sleeve 231 and the second sleeve 232 will be described below. Figure 3 As shown, the nut 233 of the clamping member 230 is arranged in the frame, located at the rear end of the first sleeve 231 and separated from the first sleeve 231. The rear end of the second sleeve 232 (ie, Figure 3 The second sleeve 232 (the right end of the second sleeve 232 in the first sleeve 231) extends from the rear end of the first sleeve 231 and screws into the nut 233. When the first sleeve 231 is driven to rotate by the gear set 220, the second sleeve 232 sleeved in the first sleeve 231 contacts the inner circumference of the first sleeve 231, and the second sleeve 232 and the first sleeve 231 rotate together due to friction. As the second sleeve 232 rotates, its rear end is continuously screwed into the nut, so that the second sleeve 232 moves toward the rear end of the first sleeve 231. In this way, the cone surface fit between the second sleeve 232 and the first sleeve 231 causes the Kirschner wire 120 to be gradually clamped by the second sleeve 232. On the contrary, when the first sleeve 231 is driven by the gear set 220 to rotate in the opposite direction, the rear end of the second sleeve 232 gradually screws out of the nut 233, so that the second sleeve 232 moves toward the front end of the first sleeve 231, so that the Kirschner wire 120 is gradually loosened from the second sleeve 232. Since the nut 233 is used to control the clamping degree of the Kirschner wire 120, when the Kirschner wire 120 is clamped, the screwing amount of the second sleeve 232 into the nut 233 is maintained constant, so that when the Kirschner wire 120 rotates at a high speed for drilling, the clamping force of the Kirschner wire 120 is always maintained constant, thereby avoiding the negative impact on the Kirschner wire caused by the change of the clamping force.

[0036] See also Figure 4 , Figure 4 FIG. 2 shows a cross-sectional view of the clamping device 200 in the XY plane. Figure 4As shown, the second sleeve 232 is positioned in the first sleeve 231 by a positioning pin 236. The positioning pin 236 is arranged on the outer circumferential surface of the second sleeve 232. A positioning groove 237 is correspondingly formed on the inner surface of the first sleeve 231. The positioning groove 237 is formed as a long and narrow groove. The width of the positioning groove 237 (i.e., the extension range of the positioning groove 237 in the circumferential direction of the inner surface of the first sleeve 231) is slightly larger than the diameter of the positioning pin 236, so that when the second sleeve 232 is sleeved in the first sleeve 231, the positioning pin 236 is stuck in the positioning groove 237 and prevents the circumferential displacement between the second sleeve 232 and the first sleeve 231. The length of the positioning groove 237 (i.e., the extension range of the positioning groove 237 in the circumferential direction of the inner surface of the first sleeve 231) is much larger than the width of the positioning groove 237, so that when the positioning pin 236 is inserted into the positioning groove 237, the second sleeve 232 can move back and forth in the extension direction of the first sleeve 231 (i.e., the X direction). As a result, the second sleeve 232 and the first sleeve 231 can move relative to each other in the axial direction under the matching relationship between the positioning groove 237 and the positioning pin 236, while preventing relative rotation in the circumferential direction. In this way, the second sleeve 232 and the first sleeve 231 no longer need to rely on friction to achieve the synchronous rotation of the second sleeve 232 and the first sleeve 231, and then the second sleeve 232 and the first sleeve 231 can be formed of materials with low friction between each other, which further reduces the locking resistance of the second sleeve 232.

[0037] Continue reading Figure 4 In some embodiments, the chuck mechanism 220 may further include a limiting post 250. The limiting post 250 is disposed on the housing 110 and partially extends into the housing 110 and passes through the frame 240 to be disposed near the nut 233. Specifically, the limiting post 250 is positioned at a radial position of the nut 233. Figure 5A As shown, the limiting column 250 further includes a column 251 disposed at one end and a button 252 disposed at the other end. For example, the limiting column 250 may have a spring-type telescopic structure (such as a spring pin) formed therein, so that when the button 252 is pressed, the column 251 further extends outward, and when the button 252 is pressed again, the column 251 retracts backward. In some embodiments, an actuator (such as a drive motor) may also be applied to the limiting column 250 to achieve the telescopic movement of the column 251. Figure 5B As shown, at least one limiting groove 238 is formed on the outer peripheral surface of the nut 233, for example Figure 5B Two limiting grooves 238 are shown, but more or fewer limiting grooves 238 may also be provided. Figure 4 , Figure 5A and 5BThe limiting column 250 can switch between the first position and the second position. For example, when the limiting column 250 is in the first position, the column 251 of the limiting column 250 is located outside the nut 233. When the button 252 is pressed, the limiting column 250 is switched to the second position. At this time, the column 251 extends radially inward toward the nut 233 and is inserted into the limiting groove 238 of the nut 233. Figure 4 251' is shown as a cylinder 251' marked with a dotted line in the figure. It should be noted that for the sake of clarity, the cylinder 251' is shown as thinner than the cylinder 251, but the cylinder 251' and the cylinder 251 only represent different positions of the same cylinder, so they should have the same diameter. When the button 252 is pressed again, the cylinder 251 retracts again and disengages from the limiting groove 238 on the nut 233. The advantage of providing a limiting column 250 and a limiting groove 238 is that when the limiting column 250 is in the second position, the nut 233 is restricted from rotating by the limiting column 250, so that the rear end of the second sleeve 232 can be better screwed into the nut 233 when the Kirschner wire 120 needs to be clamped, and when the limiting column 250 is in the first position, the nut 233 can rotate together with other components of the chuck mechanism 220 under the drive of the motor 210. Therefore, when the limit column 250 is switched to the second position, the Kirschner wire 120 is clamped, and when the limit column 250 is switched to the first position, the chuck mechanism 220 and the Kirschner wire 120 are formed as a whole, so that the chuck mechanism 220 and the Kirschner wire 120 rotate together under the drive of the motor 210 for drilling positioning in bone tissue surgery, thereby eliminating the need for an additional motor for drilling positioning and simplifying the structure of the device.

[0038] See also Figure 6 In some embodiments, the second sleeve 232 is formed with a plurality of claws 239, each of which has a gap with its adjacent claw, so that when the front end of the second sleeve 232 is squeezed due to the conical surface fit of the first sleeve 231 and the second sleeve 232, the claws 239 can shrink toward the center of the second sleeve 232, thereby better clamping the Kirschner wire 120.

[0039] See also Figure 7 and Figure 8 , Figure 7 and Figure 8 An exploded view and a cross-sectional view of a K-wire drilling device 300 having the above-mentioned chuck structure 200 are respectively shown.

[0040] The drilling device 300 comprises a housing 310, a Kirschner wire 320, a chuck structure 200 and a thrust device 340 disposed in the housing 310. The chuck structure 200 is as described above. Figures 1 to 6The thrust device 340 is connected to the chuck structure 200 to apply thrust to the thrust device 340. In bone tissue surgery, as the Kirschner wire 320 rotates at high speed to perform a drilling operation, the thrust device 340 applies thrust to the chuck structure 200 and gradually pushes the Kirschner wire 320 clamped by the chuck structure 200 out of the housing 310 until the bone tissue is drilled to a predetermined depth using the Kirschner wire 320. In some embodiments, the thrust device 340 includes a slide-type electric cylinder 341 and a brake motor 342.

[0041] In some embodiments, the pressure sensing device 350 is disposed between the clamp structure 200 and the thrust device 340 to measure the thrust applied by the thrust device 340 to the clamp structure 200 and the force that overcomes the thrust of the thrust device 340 and is fed back to the thrust device 340 when drilling bone tissue using the Kirschner wire 320. In some embodiments, the pressure sensing device 350 includes a pressure sensor 351 and a pressure sensing bracket 352 for positioning the pressure sensor 351.

[0042] In some embodiments, the drilling device 300 further includes an arched support 360, the arched support 360 having a first end 361 and a second end 362, and an opening 363 is formed on the second end 362. Figure 8 As shown, the first end 361 of the arch support 360 is disposed on the housing 310, and the opening 363 is aligned with the front end of the first sleeve 231 of the clamping mechanism 200, so that the Kirschner wire 320 extending from the front end of the first sleeve 231 can be further supported in the opening 363 to provide improved positioning and support for the Kirschner wire 320. In some embodiments, the opening 363 can be provided with a tapered bearing to allow the Kirschner wire 320 to pass therethrough, so that the Kirschner wire 320 can rotate freely in the opening 363. When the drilling is completed, the Kirschner wire clamping device is released and reset, and the tapered bearing in the arch support is pushed out of the opening 363, so that the Kirschner wire therein is disengaged from the opening 363 until the Kirschner wire is completely separated from the drilling device.

[0043] The foregoing is directed to embodiments of the present disclosure, and other and further embodiments of the present disclosure may be modified without departing from the scope of protection thereof, and the scope of protection is determined by the appended claims.

Claims

1. A Kirschner wire clamping device, comprising a housing and a clamping mechanism disposed in the housing, wherein the clamping mechanism comprises a frame, a motor, a gear set, and a clamping mechanism, wherein The gear set and the chuck mechanism are arranged in a space defined by the frame; The gear set is connected to the driving shaft of the motor, the gear set transmits the output from the driving shaft to the chuck mechanism to drive the chuck mechanism to rotate, and the gear set decelerates the output of the driving shaft, thereby transmitting the decelerated output to the chuck mechanism; and The chuck mechanism comprises a first sleeve connected to the gear set and having a front end and a rear end; a second sleeve, which is sleeved in the first sleeve and matched with the conical surface of the first sleeve, and the second sleeve has a first end and a second end, the Kirschner wire is inserted into the second sleeve and extends through the first end of the second sleeve and extends out of the front end of the first sleeve, and the second end of the second sleeve extends out of the rear end of the first sleeve; and A nut is disposed at the rear end of the first sleeve separately from the first sleeve, and the second end of the second sleeve is screwed into the nut.

2. The Kirschner wire clamping device according to claim 1, wherein the gear set comprises a first gear, a second gear and a third gear meshed in sequence, the first gear is connected to the driving shaft of the motor, and the third gear is connected to the first sleeve.

3. The Kirschner wire clamping device according to claim 2, wherein the number of teeth of the second gear is greater than the number of teeth of the first gear, and the number of teeth of the third gear is greater than the number of teeth of the first gear.

4. The Kirschner wire clamping device according to claim 1, wherein the clamping mechanism further includes a positioning member, the positioning member includes a positioning pin arranged on the outer peripheral surface of the second sleeve and a positioning groove formed on the inner peripheral surface of the first sleeve, and the positioning pin extends into the positioning groove.

5. The Kirschner wire clamping device according to claim 1, wherein the chuck mechanism further includes a limiting mechanism, the limiting mechanism including a limiting column arranged on the outer shell and partially extending into the outer shell, and a limiting groove formed on the outer peripheral surface of the nut, wherein the limiting column is switchable between a first position and a second position, the limiting column disengages from the limiting groove at the first position, and engages with the limiting groove at the second position. 6 . The K-wire clamping device according to claim 1 , wherein the inner circumferential surface of the first sleeve is at least partially formed from the front end of the first sleeve into a conical surface that tapers toward the rear end of the first sleeve.

7. A Kirschner wire clamping device according to claim 1, wherein the chuck mechanism further includes a conical sleeve, which is arranged at the front end of the first sleeve and clamped between the first sleeve and the second sleeve, wherein the inner circumferential surface of the conical sleeve is formed as a conical surface that gradually tapers from the front end of the first sleeve toward the rear end of the first sleeve.

8. A Kirschner wire drilling device, comprising: The Kirschner wire clamping device according to any one of claims 1 to 7; and The pushing device is arranged in the shell of the Kirschner wire clamping device and is connected to the Kirschner wire clamping device to apply a pushing force to the Kirschner wire clamping device.

9. The Kirschner wire drilling device according to claim 8 further comprises a pressure sensing device, wherein the sensing device is arranged between the Kirschner wire clamping device and the pushing device.

10. The Kirschner wire drilling device according to claim 8 further comprises an arch-shaped bracket having a first end and a second end, the first end of the arch-shaped bracket being connected to the shell of the Kirschner wire clamping device, and an opening being formed on the second end of the arch-shaped bracket, and the opening being aligned with the front end of the first sleeve of the Kirschner wire clamping device.

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