Bone drill and orthopedic surgery equipment

Abstract

The invention discloses a bone drill and orthopedic surgery equipment, the bone drill comprises an offset rotary driving module, a force sensing linear feeding module, a drill bit, a drill bushing assembly and a drill bushing clamping assembly, and the offset rotary driving module drives the drill bit to rotate; the force sensing linear feeding module is connected with the offset type rotary driving module, drives a drill bit to do linear feeding motion and senses the pressure in the drilling process in real time; the drill sleeve assembly is arranged at the front end of the drill bit in a sleeving mode and used for rotationally supporting and linearly guiding the drill bit. And the drill bushing clamping assembly is used for positioning and clamping the drill bushing assembly in a self-centering manner. The drill bit and the guide sleeve can be conveniently replaced, so that the operation time is saved, resource waste is avoided, and the problem that the positioning precision is reduced due to replacement of the drill bit is solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of medical devices, and particularly relates to a bone drill and an orthopedic surgical device. Background Art

[0002] In traditional surgeries, most of the bone drills used for bone drilling are manually operated by doctors, which cannot ensure the accuracy and safety of bone drilling operations, and there are also problems of low drilling efficiency and high labor intensity. In surgeries performed using an orthopedic surgical robot, the orthopedic surgical robot controls the robotic arm to clamp a metal guide sleeve and move it to a specified position for precise positioning through surgical planning software, and the bone drilling operation still relies on a doctor to hold the bone drill to complete.

[0003] Patent No. 201620609211.X discloses an intelligent bone drill, which has functions of rotary drilling, linear feeding, drill sleeve protection, and drilling force / torque sensing. Setting this intelligent bone drill at the end of the robotic arm and combining it with preoperative planning software and an optical positioning system constitutes a new type of orthopedic surgical robot system. In addition to having a navigation and positioning function, the implanting operation of bone drilling in this system is intelligently controlled by the intelligent bone drill, and no longer requires manual operation by doctors.

[0004] However, during the robotic surgery process, it is still necessary to frequently replace drill bits and drill sleeves with different diameters and lengths. The current intelligent bone drill solution is to lift the robot to an open area to replace the drill bit from the front end of the intelligent bone drill, and then restore the robot to its original position after the replacement. This not only wastes a large amount of surgical time, but also reduces the positioning accuracy when restoring to the original position due to the repeated positioning error of the robot. In addition, in order to adapt to drill sleeves with different diameters, it is necessary to equip a variety of different specifications of adapter mandrels (see Patent No. CN202121565820.7), resulting in too many varieties, complex operations, and resource waste. Summary of the Invention

[0005] The main object of the present invention is to provide a bone drill and an orthopedic surgical device that can facilitate the replacement of drill bits and guide sleeves.

[0006] To achieve the foregoing invention object, the technical solution adopted by the present invention includes: A bone drill, comprising: A drill bit; An offset rotary drive module is connected to the drill bit and is used to drive the drill bit to perform rotary motion. The module comprises a rotary drive motor, a transmission member, a rotary spindle and a drill chuck. The rotary drive motor is connected to the rotary spindle through the transmission member. The drill chuck is coaxially arranged at the front end of the rotary spindle. Both the rotary spindle and the drill chuck are hollow structures. The rotary drive motor and the rotary spindle are offset at an offset distance that does not block the hollow structure of the rotary spindle. The drill bit can pass through the hollow structure of the rotary spindle and the hollow structure of the drill chuck in sequence from the rear end of the rotary spindle, and pass through the drill chuck to be clamped by the drill chuck. A force sensing linear feed module, connected to the offset rotary drive module, is used to drive the drill bit to perform linear feed motion and sense the pressure of the drilling process in real time; A drill sleeve assembly, which is sleeved on the front end of the drill bit and is used to provide rotational support and linear guidance for the drill bit; The drill sleeve clamping assembly is used for self-centering positioning and clamping of the drill sleeve assembly.

[0007] In a preferred embodiment, the force-sensing linear feed module includes a feed drive motor, a linear module, a first slider, a second slider and a force sensor, the linear module is connected to the feed drive motor, the first slider is connected to the linear module, the feed drive motor drives the linear module to carry the first slider for linear motion, the second slider is movably connected to the first slider through a linear guide, the two sides of the force sensor are respectively fixedly connected to the first slider and the second slider, so as to enable the second slider to have a pressure sensing function in the feed direction; the offset rotation drive module is connected to the second slider.

[0008] In a preferred embodiment, a hollow cavity is provided between the first slider and the second slider, the linear guide rail and the force sensor are both enclosed in the hollow cavity, and the first slider and the second slider form a closed structure.

[0009] In a preferred embodiment, the drill sleeve assembly includes an outer sleeve and at least one inner ringless needle roller bearing located in the outer sleeve, the inner ringless needle roller bearing provides rotational support and linear guidance for the drill bit, and the sliding friction between the drill bit and the inner wall of the outer sleeve is converted to rolling friction of the needle roller through the inner ringless needle roller bearing.

[0010] In a preferred embodiment, the inner ringless needle roller bearing is respectively arranged in the front and rear ends of the outer sleeve.

[0011] In a preferred embodiment, the drill sleeve clamping assembly includes a driving assembly and a left clamping assembly and a right clamping assembly connected to the driving assembly. The left clamping assembly and the right clamping assembly are respectively located on the left and right sides of the drill sleeve assembly, and the two move toward or away from each other under the drive of the driving assembly.

[0012] In a preferred embodiment, the driving assembly includes a handwheel, a rotating shaft, a gear assembly, a first lead screw, and a second lead screw. The handwheel is connected to the rotating shaft, and the rotating shaft is connected to the gear assembly. The handwheel drives the rotating shaft to drive the gear assembly to rotate. The gear assembly is connected to the left clamping assembly through the first lead screw and to the right clamping assembly through the second lead screw. The rotational motion of the gear assembly is converted into left and right linear motion through the first lead screw and the second lead screw, driving the left clamping assembly and the right clamping assembly to move towards or away from each other.

[0013] In a preferred embodiment, both the left clamping assembly and the right clamping assembly include a flexible clamping block and a flexible guiding leaf spring connected to the flexible clamping block. The flexible clamping block is threadedly connected to the lead screw at the corresponding end and moves linearly left and right under the guiding action of the flexible guiding leaf spring.

[0014] In a preferred embodiment, the flexible guiding leaf spring includes a first leaf spring and a second leaf spring, and the first leaf spring and the second leaf spring form a parallelogram structure.

[0015] On the other hand, the present invention also provides an orthopedic surgical device including the above bone drill.

[0016] Compared with the prior art, the beneficial effects of the present invention are at least as follows: 1. By offsetting the rotation driving motor and the rotation main shaft of the rotation driving module and combining the hollow design of the rotation main shaft and the drill chuck, the present invention enables the drill bit to be disassembled and replaced from the rear end of the bone drill, saving surgical time and avoiding the problem of reduced position accuracy caused by repeated positioning. Moreover, a drill sleeve clamping assembly is newly added to achieve self-centering clamping of the drill sleeve, facilitating the replacement of drill sleeves with different outer diameters, avoiding resource waste, being small and compact in structure, frictionless, and not requiring lubricant addition, meeting the requirements of disinfection and sterilization of medical devices.

[0017] 2. The force sensing linear feed module of the present invention realizes the adaptive assembly of the force sensor and improves the force sensing accuracy by adding a second slider and connecting the first slider and the second slider through a linear guide rail and a force sensor, and at the same time ensures the high rigidity of the second slider in all directions. Moreover, the two sliders form a closed structure, which can prevent dust and splash.

[0018] 3. The drill sleeve assembly of the present invention adds a needle roller bearing without an inner ring inside the outer sleeve, which plays a role in rotating support and linear guiding for the drill bit, reduces the vibration of the slender drill bit during high-speed drilling, and changes the sliding friction between the drill bit and the inner wall of the outer sleeve into the rolling friction of the needle roller, thereby effectively avoiding the entry of metal iron filings into the human body. Description of the Drawings

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0020] Figure 1 is an overall three-dimensional view of a bone drill provided by an embodiment of the present invention; Figure 2 is a sectional view of an offset rotary drive module provided by an embodiment of the present invention; Figure 3 is a three-dimensional view of a force-sensing linear feed module provided by an embodiment of the present invention; Figure 4 is a sectional view of a force-sensing linear feed module provided by an embodiment of the present invention; Figure 5 is Figure 4 the A-A sectional view of; Figure 6 is a three-dimensional view of a drill bushing assembly provided by an embodiment of the present invention; Figure 7 is Figure 6 the partial enlarged view at position I in; Figure 8 is a three-dimensional view of a drill bushing clamping assembly provided by an embodiment of the present invention; Figure 9 is a top view of a drill bushing clamping assembly provided by an embodiment of the present invention; Figure 10 is Figure 9 the B-B sectional view of; Reference numerals: 100. Offset Rotary Drive Module; 100.1 Rotary Drive Motor; 100.2 First Gear; 100.3 Second Gear; 100.4 Support; 100.5 Rotary Spindle; 100.6 Drill Chuck; 100.7 Bearing; 200. Force Sensing Linear Feed Module; 200.1 Feed Drive Motor; 200.2 First Slide Block; 200.3 Second Slide Block; 200.4 Tensile and Compressive Force Sensor; 200.5 Ball Eye Bearing; 200.6 Crossed Roller Guide; 200.7 Linear Module; 300 Drill Bit; 400 Drill Bush Assembly; 400.1 Outer Sleeve; 400.2 Needle Roller Bearing without Inner Ring; 500 Drill Bush Clamping Assembly; 500.1 Handwheel; 500.2 Third Gear; 500.3 Rotating Shaft; 500.4 Clamping Block; 500.4.1 Base; 500.4.2 Left V-shaped Clamping Block; 500.4.3 Right V-shaped Clamping Block; 500.4.4 Flexible Guide Reed; 500.4.4.1 First Reed; 500.4.4.2 Second Reed; 500.5 Fourth Gear; 500.6 Fifth Gear; 500.7 Sixth Gear; 500.8 Right-handed Lead Screw; 500.9 Left-handed Lead Screw. Detailed Embodiment

[0021] The present invention will be more fully understood by the following detailed embodiments which should be read in conjunction with the accompanying drawings. Specific embodiments of the present invention are disclosed herein; however, it should be understood that the disclosed embodiments are merely exemplary of the present invention, and the present invention may be embodied in various forms. Therefore, the specific functional details disclosed herein should not be construed as limiting, but rather as a basis for the claims and as a representative basis for teaching those skilled in the art to employ the present invention in any suitable detailed embodiment in different ways.

[0022] As Figures 1 to 10 shown, a bone drill disclosed in an embodiment of the present invention mainly includes an offset rotary drive module 100, a force sensing linear feed module 200, a drill bit 300, a drill bush assembly 400, and a drill bush clamping assembly 500. The offset rotary drive module 100 drives the drill bit 300 to perform a rotary motion; the force sensing linear feed module 200 is connected to the offset rotary drive module 100, drives the drill bit 300 to perform a linear feed motion, and senses the pressure during the drilling process in real time; the drill bush assembly 400 is sleeved on the front end of the drill bit 300, and is used for rotatably supporting and linearly guiding the drill bit 300, and protecting nerves, muscles, fascia, etc. around the bone tissue from being wound by the drill bit 300; the drill bush clamping assembly 500 performs self-centering positioning and clamping on the drill bush assembly 400.

[0023] Combined with Figure 2 and Figure 3As shown, the offset rotary drive module 100 specifically includes a rotary drive motor 100.1, a transmission member, a support 100.4, a rotary main shaft 100.5, and a drill chuck 100.6. The transmission member includes a first gear 100.2 and a second gear 100.3 that are meshed with each other up and down and are located within the support 100.4. The rotary main shaft 100.5 is connected to the first gear 100.2 and is used to drive the first gear 100.2 to rotate. The first gear 100.2 drives the second gear 100.3 meshed with it to rotate synchronously. The rotary main shaft 100.5 is rotatably connected to the inside of the support 100.4 through a bearing 100.7 and is connected to the second gear 100.3 at the rear end and rotates synchronously under the drive of the second gear 100.3. The drill chuck 100.6 is coaxially arranged at the front end of the rotary main shaft 100.5 and is located outside the support 100.4. The rotary drive motor 100.1 and the rotary main shaft 100.5 are offset and arranged at a certain offset distance. The power is transmitted to the rotary main shaft 100.5 through the first gear 100.2 and the second gear 100.3, thereby driving the drill chuck 100.6 to generate a rotary motion. Both the rotary main shaft 100.5 and the drill chuck 100.6 are hollow structures. The drill bit 300 can sequentially pass through the hollow structure of the rotary main shaft 100.5 and the hollow structure of the drill chuck 100.6 from the rear end of the rotary main shaft 100.5, and pass through and be clamped by the drill chuck 100.6 and rotate along with the drill chuck 100.6. The rotary drive motor 100.1 and the rotary main shaft 100.5 can be arranged in an offset and parallel manner up and down, left and right, or obliquely. The offset distance is such that the motor does not block the hollow structure of the rotary main shaft 100.5. This design can facilitate the installation, disassembly, and replacement of the drill bit 300 from the rear end of the bone drill, save surgical time, and avoid the problem of reduced position accuracy caused by repeated positioning. In addition, in other embodiments, the above-mentioned transmission member can also be a belt drive or other various ways that can achieve parallel shaft transmission, and all are applicable to the present invention.

[0024] Combined Figures 3 to 5 As shown, the force-sensing linear feed module 200 includes a feed drive motor 200.1, a linear module 200.7, a first slider 200.2, a second slider 200.3, and a tensile and compressive force sensor 200.4. The feed drive motor 200.1 is connected to the linear module 200.7. The first slider 200.2 is slidably connected to the linear module 200.7. The feed drive motor 200.1 drives the first slider 200.2 on the linear module 200.7 to perform a linear motion. In this embodiment, the linear module 200.7 is specifically a KK linear module. The second slider 200.3 is movably connected above the first slider 200.2 through a linear guide rail. In this embodiment, the linear guide rail is specifically a crossed roller guide rail 200.6. As Figure 5As shown, a pair of crossed roller guides 200.6 are symmetrically arranged on the left and right in the hollow cavity formed between the first slider 200.2 and the second slider 200.3. One side of the crossed roller guide 200.6 is fixedly connected to the first slider 200.2 by screws, and the other side of the crossed roller guide 200.6 is fixedly connected to the second slider 200.3 by screws. The tension and compression sensor 200.4 is located exactly in the middle of the pair of crossed roller guides 200.6, and both sides of it are fixedly connected to the first slider 200.2 and the second slider 200.3 respectively through spherical bearings 200.5, so as to ensure that the second slider 200.3 has high rigidity in all directions and enable the second slider 200.3 to have the pressure sensing function in the feeding direction. The external load (i.e., the offset rotary drive module 100 here) is connected to the second slider 200.3. In addition, both ends of the tension and compression sensor 200.4 are connected to the first slider 200.2 and the second slider 200.3 through spherical bearings 200.5, so as to realize the adaptive installation of the tension and compression sensor 200.4 in the case of machining and assembly errors and improve the force sensing accuracy. The second slider 200.3 is a hollow structure at the lower part, and the crossed roller guide 200.6, the tension and compression sensor 200.4, and the spherical bearings 200.5 are all enclosed inside it. The length and width dimensions of the first slider 200.2 are exactly the same as those of the second slider 200.3, and together with the second slider 200.3, they form a closed structure, which can prevent dust, splash, etc.

[0025] Combined with Figures 6 to 7 As shown, the drill bushing assembly 400 includes an outer sleeve 400.1 and a needle roller bearing without inner ring 400.2. The needle roller bearing without inner ring 400.2 is located inside the outer sleeve 400.1, and the number of it is preferably two, which are coaxially arranged at the upper and lower ends of the outer sleeve 400.1 respectively. Among them, the inner diameter of the outer sleeve 400.1 is larger than the inner diameter of the needle roller bearing without inner ring 400.2, and the inner diameter of the needle roller bearing without inner ring 400.2 is slightly larger than the outer diameter of the drill bit 300, which plays a role of rotary support and linear guidance for the drill bit 300, reduces the vibration of the slender drill bit during high-speed drilling, and improves the drilling stability. Through the needle roller bearing without inner ring 400.2, the sliding friction between the drill bit 300 and the inner wall of the outer sleeve 400.1 is changed into the rolling friction of the needle rollers, so as to effectively prevent metal chips from entering the human body. In this embodiment, the drill bushing assembly 400 is made of medical stainless steel material to prevent rusting and facilitate cleaning and disinfection.

[0026] Combined with Figures 8 to 10As shown in the figure, in this embodiment, the drill bushing clamping assembly 500 includes a handwheel 500.1, a third gear 500.2, a rotating shaft 500.3, a clamping block 500.4, a fourth gear 500.5, a fifth gear 500.6, a sixth gear 500.7, a right-handed lead screw 500.8, and a left-handed lead screw 500.9. Among them, the clamping block 500.4 is an integral flexible component, specifically including a rigid base 500.4.1, a left V-shaped clamping block 500.4.2, a right V-shaped clamping block 500.4.3, and a flexible guiding spring plate 500.4.4. Among them, the left V-shaped clamping block 500.4.2 and the right V-shaped clamping block 500.4.3 are respectively located on the left and right sides of the drill bushing assembly 400 and are symmetrically arranged with the drill bushing assembly 400 as the center; the left V-shaped clamping block 500.4.2 and the right V-shaped clamping block 500.4.3 are respectively connected to the base 500.4.1 through a flexible guiding spring plate 500.4.4, and both can move linearly left and right under the action of the flexible guiding spring plate 500.4.4 on the corresponding side. In this embodiment, the flexible guiding spring plate 500.4.4 is a parallelogram structure composed of a first spring plate 500.4.4.1 and a second spring plate 500.4.4.2, which can expand the moving stroke and reduce the parasitic displacement generated in the non-working direction of the flexible spring plate. The handwheel 500.1, the third gear 500.2, and the fourth gear 500.5 are coaxially and fixedly connected to the rotating shaft 500.3, and the rotating shaft 500.3 is supported on the base 500.4.1. The fifth gear 500.6 meshes with the fourth gear 500.5 and is fixedly connected to the right-handed lead screw 500.8; the sixth gear 500.7 meshes with the fourth gear 500.5 and is fixedly connected to the left-handed lead screw 500.9. The left V-shaped clamping block 500.4.2 is threadedly connected to the right-handed lead screw 500.8, and the right V-shaped clamping block 500.4.3 is threadedly connected to the left-handed lead screw 500.9. Specifically, the left V-shaped clamping block 500.4.2 has a right-handed thread that matches the right-handed lead screw 500.8, and the right V-shaped clamping block 500.4.3 has a left-handed thread that matches the left-handed lead screw 500.9. Rotating the handwheel 500.1 drives the coaxially located third gear 500.2 and fourth gear 500.5 to rotate synchronously in the same direction, further driving the sixth gear 500.7 and the fifth gear 500.6 to rotate synchronously in the same direction, so as to drive the left V-shaped clamping block 500.4.2 and the right V-shaped clamping block 500.4.3 to move synchronously towards or away from each other through the right-handed lead screw 500.8 and the left-handed lead screw 500.9, realizing self-centering clamping of the drill bushing assembly 400, and it is very convenient to replace the bushing assembly 400 with different outer diameter sizes. In this embodiment, the drill bushing clamping assembly 500 and the drill bushing assembly 400 are specifically connected to the front end of the linear module 200.7 through a mounting bracket (such as a Z-shaped bracket).In addition, in other alternative embodiments, the driving structure of the clamping block 500.4 is not limited to the driving mechanism combining the handwheel and the threaded component here. Other driving mechanisms that can drive the left and right clamping blocks to move towards or away from each other are also applicable to the present invention.

[0027] Based on the bone drill provided in the above embodiments, the present invention further provides an orthopedic surgical device. In this orthopedic surgical device, it includes the above bone drill, and the bone drill can be fixed on a robotic arm (not shown in the figure). The robotic arm moves the bone drill to a designated position under the control of a relevant automatic control system, and then the bone drill performs drilling and cutting.

[0028] The advantages of a bone drill and an orthopedic surgical device disclosed by the present invention are as follows: (1) By offsetting the rotary drive motor and the rotary main shaft of the rotary drive module and combining the hollow design of the rotary main shaft and the drill chuck, the present invention realizes that the drill bit can be disassembled and replaced from the rear end of the bone drill, saving surgical time and avoiding the problem of reduced position accuracy caused by repeated positioning. Moreover, a drill sleeve clamping assembly is newly added to achieve self-centering clamping of the drill sleeve, facilitating the replacement of drill sleeves with different outer diameter sizes, avoiding resource waste, having a small and compact structure, no friction, and not requiring lubricant addition, meeting the requirements of disinfection and sterilization of medical devices. (2) The force sensing linear feed module of the present invention realizes the adaptive assembly of the force sensor and improves the force sensing accuracy by adding a second slider and connecting the first slider and the second slider through a linear guide rail and a force sensor, and at the same time ensures the high rigidity of the second slider in all directions. Meanwhile, the two sliders form a closed structure, which can prevent dust and splashing. (3) The drill sleeve assembly of the present invention adds a needle roller bearing without an inner ring in the outer sleeve, which plays a role in rotating support and linear guiding for the drill bit, reduces the vibration of the slender drill bit during high-speed drilling, and changes the sliding friction between the drill bit and the inner wall of the outer sleeve into the rolling friction of the needle roller, thereby effectively preventing metal chips from entering the human body.

[0029] All aspects, embodiments, features, and examples of the present invention should be considered illustrative in all respects and are not intended to limit the present invention. The scope of the present invention is only defined by the claims. Without departing from the spirit and scope of the claimed present invention, those skilled in the art will understand other embodiments, modifications, and uses.

[0030] In the present invention, the use of titles and chapters does not mean limiting the present invention; each chapter can be applied to any aspect, embodiment, or feature of the present invention.

Claims

1. A bone drill, characterized in that: The bone drill includes: A drill bit; An offset rotary drive module connected to the drill bit for driving the drill bit to perform a rotary motion. It includes a rotary drive motor, a transmission member, a rotary main shaft, and a drill chuck. The rotary drive motor is in transmission connection with the rotary main shaft through the transmission member. The drill chuck is coaxially arranged at the front end of the rotary main shaft. Both the rotary main shaft and the drill chuck are hollow structures. The rotary drive motor and the rotary main shaft are offset from each other at an offset distance that does not block the hollow structure of the rotary main shaft. The drill bit can sequentially pass through the hollow structure of the rotary main shaft and the hollow structure of the drill chuck from the rear end of the rotary main shaft and pass through the drill chuck to be clamped by the drill chuck; A force-sensing linear feed module connected to the offset rotary drive module for driving the drill bit to perform a linear feed motion and real-time sensing of the pressure during the drilling process; A drill bushing assembly sleeved on the front end of the drill bit for providing rotary support and linear guidance to the drill bit; A drill bushing clamping assembly for self-centering positioning and clamping of the drill bushing assembly.

2. The bone drill according to claim 1, wherein: The force-sensing linear feed module includes a feed drive motor, a linear module, a first slider, a second slider, and a force sensor. The linear module is connected to the feed drive motor. The first slider is connected to the linear module. The feed drive motor drives the linear module to drive the first slider to perform a linear motion. The second slider is movably connected to the first slider through a linear guide rail. The two sides of the force sensor are respectively fixedly connected to the first slider and the second slider for enabling the second slider to have the pressure sensing function in the feed direction; the offset rotary drive module is connected to the second slider.

3. The bone drill according to claim 2, wherein: There is a hollow cavity between the first slider and the second slider. The linear guide rail and the force sensor are both enclosed in the hollow cavity, and the first slider and the second slider form a closed structure.

4. A bone drill according to claim 1, characterized in that: The drill bushing assembly includes an outer sleeve and at least one needle roller bearing without an inner ring located inside the outer sleeve. The needle roller bearing without an inner ring provides rotary support and linear guidance to the drill bit, and through the needle roller bearing without an inner ring, the sliding friction between the drill bit and the inner wall of the outer sleeve becomes the rolling friction of the needle rollers.

5. A bone drill according to claim 4, characterized in that: The needle roller bearings without an inner ring are respectively arranged at the front and rear ends inside the outer sleeve.

6. The bone drill according to claim 1, wherein: The drill bushing clamping assembly includes a drive assembly and a left clamping assembly and a right clamping assembly connected to the drive assembly. The left clamping assembly and the right clamping assembly are respectively located on the left and right sides of the drill bushing assembly and move towards or away from each other under the drive of the drive assembly.

7. A bone drill according to claim 6, characterized in that: The drive assembly includes a handwheel, a rotating shaft, a gear assembly, a first lead screw, and a second lead screw. The handwheel is connected to the rotating shaft. The rotating shaft is connected to the gear assembly. The handwheel drives the rotating shaft to drive the gear assembly to rotate. The gear assembly is connected to the left clamping assembly through the first lead screw and is connected to the right clamping assembly through the second lead screw. The rotational motion of the gear assembly is converted into left and right linear motions through the first lead screw and the second lead screw to drive the left clamping assembly and the right clamping assembly to move towards or away from each other.

8. A bone drill according to claim 7, characterized in that: Both the left clamping assembly and the right clamping assembly include a flexible clamping block and a flexible guiding leaf spring connected to the flexible clamping block. The flexible clamping block is threadedly connected to the lead screw at the corresponding end and moves linearly left and right under the guiding action of the flexible guiding leaf spring.

9. A bone drill according to claim 8, characterized in that: The flexible guiding leaf spring includes a first leaf spring and a second leaf spring, and the first leaf spring and the second leaf spring form a parallelogram structure.

10. An orthopedic surgical device, characterized in that: The device includes the bone drill according to any one of claims 1 to 9.

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