Anti-deviation orthopedic drill bit assembly based on orthopedic robot adaptation and assembling method

Abstract

This invention relates to the field of drilling technology, and more particularly to an anti-deviation orthopedic drill bit assembly and assembly method adapted for orthopedic robots. The assembly includes a housing assembly and a drill bit assembly. A drive assembly is installed inside the housing assembly, and a stabilizing assembly is installed at one end of the drill bit assembly. The stabilizing assembly includes a cylindrical shell with an oil reservoir inside. A spring is fixedly connected inside the oil reservoir, and a first duckbill valve is fixedly connected near the middle of the oil reservoir. A circular plate is embedded inside the cylindrical shell, and a second duckbill valve is fixedly connected inside the circular plate. A push rod is fixedly connected to the end of the spring away from the first duckbill valve, and a slanted plate is fixedly connected to the end of the push rod away from the spring. In this invention, the device can compensate for vibration and wear gaps in real time, preventing drill bit loosening and deviation, and abnormal expansion of the drilling diameter, ensuring that the drilling depth accuracy meets standards, maintaining high precision over a long period, and improving surgical safety and reliability.

Description

Technical Field

[0001] This invention relates to the field of drilling rig technology, specifically to an anti-deviation orthopedic drill bit assembly and assembly method adapted to orthopedic robots. Background Technology

[0002] The orthopedic robot adapter drill is a specialized surgical drill that is precisely matched with orthopedic surgical robot systems and integrates functions such as force feedback and position perception. Its size, connection interface and motion parameters are customized according to the robot's operating precision and the clinical needs of orthopedic surgery. Under the robot's navigation control, it can achieve minimally invasive, high-precision and high-stability bone drilling, effectively avoiding deviations from manual operation and reducing the risk of surgical trauma and complications.

[0003] Existing adjustable-depth orthopedic robot-adapted drills are susceptible to real-time fluctuations in bone cutting resistance and vibrations caused by the robot's high-speed operation during surgery. This not only causes wear on the inner wall of the adjustment mechanism and increases the clearance, but also leads to irregular expansion of the actual drilling diameter. Consequently, the deviation between the preset depth value and the actual processing value gradually accumulates, making it difficult to maintain a stable and high-precision adjustment effect over a long period. Therefore, this paper proposes an anti-deviation orthopedic drill component and assembly method based on orthopedic robot adaptation to address the above problems. Summary of the Invention

[0004] The purpose of this invention is to provide an anti-deviation orthopedic drill bit assembly and assembly method adapted to orthopedic robots, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] An anti-deviation orthopedic drill bit assembly adapted for orthopedic robots includes a housing assembly and a drill bit assembly. A drive assembly is installed inside the housing assembly, and a stabilizing assembly is installed at one end of the drill bit assembly. The stabilizing assembly includes a cylindrical shell with an oil reservoir inside. A spring is fixedly connected to the inside of the oil reservoir, and a first duckbill valve is fixedly connected near the middle of the oil reservoir. A circular plate is embedded inside the cylindrical shell, and a second duckbill valve is fixedly connected to the inside of the circular plate. A push rod is fixedly connected to the end of the spring away from the first duckbill valve, and a slanted plate is fixedly connected to the end of the push rod away from the spring. A sealing ring is fixedly connected to the outside of the circular plate, and the circular plate and the cylindrical shell are sealed by the sealing ring. The oil reservoir is filled with hydraulic oil.

[0007] As a further optimization of the present invention, the housing assembly includes a housing, the front end of which is threadedly connected to a cap, and both the housing and the cap have assembly cavities on their inner sides.

[0008] As a further optimization of the present invention, a servo electric cylinder and a limiting telescopic rod are fixedly connected to the inner side of the assembly cavity opened in the housing, and a positioning block is fixedly connected to the piston rod end of the servo electric cylinder and the piston rod end of the limiting telescopic rod.

[0009] As a further optimization of the present invention, the servo electric cylinder and the limiting telescopic rod are both fixedly connected to the cylindrical shell of the drive assembly through positioning blocks. The rear end of the cylindrical shell is fixedly connected to the housing of the servo motor. The housing of the servo motor is fixedly connected to the assembly cavity opened in the housing with a gap.

[0010] As a further optimization of the present invention, the inner side of the cylindrical shell is rotatably connected to a rotating drum via a bearing, and the rear end of the rotating drum is fixedly connected to the end of the main shaft of the servo motor.

[0011] As a further optimization of the present invention, the front end of the rotating drum is fixedly connected to a fixing plate by a bracket, the inner side of the fixing plate is fixedly connected to the outer side of the oil storage tank, and a through hole is opened near the middle of the fixing plate.

[0012] As a further optimization of the present invention, wherein: a rail plate is fixedly connected to the inner side of the rotating drum, a sliding groove is provided on the inner side of the rail plate, the rail plate is slidably connected to the slope groove through the sliding groove and a retaining plate, and the retaining plate is fixedly connected to the outer side of the slope groove.

[0013] As a further optimization of the present invention, the clamping plate is held on the outside of the drill body included in the drill bit assembly, and the drill body has an anti-disengagement groove near the rear end, and the clamping plate is embedded in the anti-disengagement groove.

[0014] As a further optimization of the present invention, the inner side of the clamping plate is provided with a rail, the inside of the rail is in close contact with the inclined surface of the inclined plate, and the end of the clamping plate away from the drill bit body is magnetically attracted to the rotating drum.

[0015] Assembly method for anti-deviation orthopedic drill bit assembly adapted to orthopedic robot;

[0016] Step 1: During installation, remove the cap and housing. The clamping plate is pre-installed in the rail plate. With the anti-disengagement groove of the drill bit body facing backward, insert it into the rotating drum through the through hole of the fixing plate, so that the anti-disengagement groove is placed between the two clamping plates. The compressed spring makes the push rod approach the first duckbill valve. Tear open the sealing film at the front end of the cylindrical shell. External air enters and pushes the push rod and the inclined plate to move backward. With the help of the sealing structure, the gas in the oil reservoir is slowly discharged. The hydraulic oil enters the oil reservoir through the first duckbill valve, which drives the circular plate and the second duckbill valve to move. The inclined plate is inserted into the groove, pushing the clamping plate to hold the anti-disengagement groove and fix the drill bit. During disassembly and assembly, insert the circular tube into the second duckbill valve to connect the air and discharge the hydraulic oil to reset the push rod.

[0017] Step 2: When in use, start the servo motor to drive the drum to rotate, and drive the drill bit body to work through the rail plate and chuck plate. Vibration will cause wear between the drill bit and the chuck plate, creating a gap. The spring force maintains the pushing force of the push rod and the inclined plate on the chuck plate. The first duckbill valve limits the hydraulic oil to prevent the chuck plate from moving away from the drill bit.

[0018] Step 3: When adjusting the drill bit position, the servo electric cylinder is activated to move the cylinder shell and internal structure. The limit telescopic rod extends to prevent shaking, thereby adjusting the length of the drill bit protruding from the shell to adapt to changes in bone hardness during surgery.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] 1. In this invention, the device achieves convenient assembly and disassembly of drill bits and multi-model compatibility through the cylindrical shell, push rod, inclined plate and clamping plate. The fixing and disassembly of drill bits can be completed without complicated operations. It can flexibly adapt to various models of drill bit components, greatly improving the convenience and versatility of the device.

[0021] 2. In this invention, the device can compensate for the gap between the drill bit and the fixed structure caused by vibration and wear in real time through the spring, the first duckbill valve, the push rod and the clamping plate. This effectively prevents the drill bit from becoming loose or shifting due to vibration and wear, avoids irregular expansion of the drilling diameter, ensures that the preset value of the drilling depth and the actual processing value are always within the qualified range, maintains a stable high-precision drilling effect in the long term, and improves the safety and reliability of the operation.

[0022] 3. In this invention, through the servo electric cylinder, cylinder shell and limiting telescopic rod, the device can finely adjust the protrusion length of the drill bit in real time according to the bone hardness during the operation. For dense bone tissue, the protrusion length can be appropriately shortened, which effectively reduces the cutting resistance of the drill bit and the vibration of the machine body, further enhances the stability of the device, adapts to the needs of different bone working conditions, and ensures the accuracy and smoothness of minimally invasive surgery. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 This is a cross-sectional structural diagram of the housing assembly of the present invention;

[0025] Figure 3 This is a schematic diagram of the shell structure of the present invention;

[0026] Figure 4 This is a cross-sectional structural diagram of the driving component of the present invention;

[0027] Figure 5 This is a schematic diagram of the drill bit assembly structure of the present invention;

[0028] Figure 6This is a schematic diagram of the stable component structure of the present invention;

[0029] Figure 7 This is a cross-sectional structural diagram of the stabilizing component of the present invention;

[0030] Figure 8 This is an exploded structural diagram of the stabilizing component of the present invention;

[0031] Figure 9 This is a schematic diagram of the drill bit body structure of the present invention.

[0032] In the diagram: 1. Housing assembly; 11. Housing; 12. Assembly cavity; 13. Servo electric cylinder; 14. Cap; 15. Limiting telescopic rod;

[0033] 2. Drive assembly; 21. Cylinder shell; 22. Servo motor; 23. Rotary drum; 24. Rail plate; 25. Fixing plate;

[0034] 3. Drill bit assembly; 31. Drill bit body; 32. Anti-disengagement groove; 33. Chuck; 34. Slope; 35. Rail;

[0035] 4. Stabilizing component; 41. Cylindrical shell; 42. Oil reservoir; 43. Spring; 44. First duckbill valve; 45. Circular plate; 46. Second duckbill valve; 47. Push rod; 48. Slanted panel. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0038] Please see Figures 1-9 The present invention provides a technical solution:

[0039] An anti-deviation orthopedic drill bit assembly and assembly method adapted for orthopedic robots includes a housing assembly 1 and a drill bit assembly 3. A drive assembly 2 is installed inside the housing assembly 1. A stabilizing assembly 4 is installed at one end of the drill bit assembly 3. The stabilizing assembly 4 includes a cylindrical shell 41. An oil reservoir 42 is opened inside the cylindrical shell 41. A spring 43 is fixedly connected inside the oil reservoir 42. A first duckbill valve 44 is fixedly connected near the middle of the oil reservoir 42. A circular plate 45 is embedded inside the cylindrical shell 41. A second duckbill valve 46 is fixedly connected inside the circular plate 45. A push rod 47 is fixedly connected to the end of the spring 43 away from the first duckbill valve 44. A slanted plate 48 is fixedly connected to the end of the push rod 47 away from the spring 43. A sealing ring is fixedly connected to the outside of the circular plate 45. The circular plate 45 and the cylindrical shell 41 are sealed by the sealing ring. The oil reservoir 42 is filled with hydraulic oil.

[0040] As a further implementation of this solution, the housing assembly 1 includes a housing 11, with a cap 14 threadedly connected to the front end of the housing 11. Both the housing 11 and the cap 14 have assembly cavities 12 on their inner sides. Through the above-mentioned arrangement, the threaded connection structure between the housing 11 and the cap 14 can achieve quick disassembly and sealing. The assembly cavity 12 on the inner side provides a stable space for subsequent component installation, while ensuring the storage and protection of the drill bit adjustment structure, and improving the overall sealing and assembly stability of the device.

[0041] As a further implementation of this solution, a servo electric cylinder 13 and a limiting telescopic rod 15 are fixedly connected to the inner side of the assembly cavity 12 opened in the housing 11. Positioning blocks are fixedly connected to the piston rod ends of the servo electric cylinder 13 and the limiting telescopic rod 15. Through the above settings, the positioning blocks enable precise docking of the servo electric cylinder 13, the limiting telescopic rod 15 and subsequent components. The dual piston rod structure can evenly distribute the force, avoid the deviation caused by a single drive, provide stable power support for drill bit length adjustment, and ensure the accuracy of the adjustment process.

[0042] As a further implementation of this solution, the servo cylinder 13 and the limiting telescopic rod 15 are both fixedly connected to the cylindrical shell 21 of the drive assembly 2 through positioning blocks. The rear end of the cylindrical shell 21 is fixedly connected to the housing of the servo motor 22. The housing of the servo motor 22 is fixedly connected to the assembly cavity 12 opened in the housing 11 with a gap. Through the above arrangement, the positioning block strengthens the connection between the servo cylinder 13, the limiting telescopic rod 15 and the cylindrical shell 21. The reserved gap can effectively buffer the vibration generated when the servo motor 22 is working, reduce the impact of vibration transmission on the overall structure, and at the same time provide space for the servo motor 22 to dissipate heat and extend the service life of the components.

[0043] As a further implementation of this solution, a rotating drum 23 is rotatably connected to the inner side of the shell 21 via a bearing. The rear end of the rotating drum 23 is fixedly connected to the end of the spindle of the servo motor 22. Through the above arrangement, the bearing connection can reduce the frictional resistance when the rotating drum 23 rotates, reduce wear and ensure high-speed rotation stability. The precise docking with the spindle of the servo motor 22 can ensure efficient power transmission, avoid the decrease in drilling efficiency caused by power loss, and improve the smoothness and accuracy of the drill bit rotation.

[0044] As a further implementation of this solution, a fixing plate 25 is fixedly connected to the front end of the rotating drum 23 via a bracket. The inner side of the fixing plate 25 is fixedly connected to the outer side of the oil storage tank 42. A through hole is provided near the middle of the fixing plate 25. Through the above-mentioned arrangement, the bracket connection structure ensures the stable assembly of the fixing plate 25 with the rotating drum 23 and the oil storage tank 42. The through hole provides a convenient channel for the insertion and positioning of the drill bit components, while realizing the precise alignment of the fixing plate 25 with the internal structure, ensuring the normal operation of the hydraulic and pneumatic components, and improving the ease of assembly of the device.

[0045] As a further implementation of this solution, a rail plate 24 is fixedly connected to the inner side of the rotary drum 23. A sliding groove is provided on the inner side of the rail plate 24. The rail plate 24 is slidably connected to the slope 34 through the sliding groove and the clamping plate 33. The clamping plate 33 is fixedly connected to the outer side of the slope 34. Through the above settings, the sliding groove structure provides a directional sliding trajectory for the clamping plate 33 and the slope 34, ensuring the accuracy of their movement and avoiding clamping failure caused by deviation. At the same time, the sliding connection facilitates the adjustment of the position according to the drill bit model, improves the flexibility of component adaptation, and enhances the stability of drill bit clamping.

[0046] As a further implementation of this solution, the clamping plate 33 is clamped on the outside of the drill body 31 included in the drill assembly 3. The drill body 31 has an anti-disengagement groove 32 near the rear end. The clamping plate 33 is embedded in the anti-disengagement groove 32. Through the above settings, the clamping structure of the clamping plate 33 embedded in the anti-disengagement groove 32 can achieve precise positioning and firm fixation of the drill body 31, preventing displacement due to vibration during drilling. At the same time, the close-fitting clamping can distribute the force, reduce local wear, ensure the fit between the drill bit and the fixed structure, and maintain drilling accuracy.

[0047] As a further implementation of this solution, a rail 35 is provided on the inner side of the clamping plate 33. The inside of the rail 35 is in close contact with the inclined surface of the inclined plate 48. The end of the clamping plate 33 away from the drill bit body 31 is magnetically attracted to the rotating drum 23. Through the above arrangement, the inclined surface contact structure can convert the thrust of the inclined plate 48 into the clamping force of the clamping plate 33 on the drill bit, thereby improving the clamping strength and stability. The magnetic attraction design further assists in fixing the position of the clamping plate 33 and prevents it from accidentally loosening. The double fixation ensures the installation reliability of the drill bit in high-speed operation and vibration environment and reduces the generation of gaps.

[0048] Workflow: During installation, the cap 14 is removed from the housing 11. The housing assembly 1 and the drive assembly 2 are integrated. The clamping plate 33 is pre-installed inside the rail plate 24. The anti-disengagement groove 32 of the drill bit body 31 faces backward. The drill bit body 31 is inserted into the inside of the rotating drum 23 through the through hole of the fixing plate 25, so that the anti-disengagement groove 32 is positioned between the two clamping plates 33. Before this, the push rod 47 compresses the spring 43, bringing the push rod 47 closer to the first duckbill valve 44. The front end of the cylindrical shell 41 is sealed with a sealing film. When the sealing film is torn open, external air enters the cylindrical shell 41. The spring force of the spring 43 pushes the push rod 47 and the inclined plate 48 to move backward. Since the gap between the opening at the rear end of the oil reservoir 42 and the push rod 47 is small, when the push rod 47 moves backward, the gas inside the oil reservoir 42 near the push rod 47 will slowly escape through the seal between the sealing ring on the outside of the push rod 47 and the cylindrical shell 41. The hydraulic oil flows out through the opening at the rear end of the oil reservoir 42. The deformation force set at the valve port at the rear end of the circular plate 45 doubles the friction force when the circular plate 45 moves. At this time, the hydraulic oil near the rear end of the circular plate 45 will enter the oil reservoir 42 through the first duckbill valve 44. At the same time, the circular plate 45 and the second duckbill valve 46 will move accordingly. The inclined plate 48 will be inserted into the groove 34. Through the shape matching of the inclined plate 48 and the groove 34, the two inclined plates 48 will push the clamping plate 33 towards the drill bit body 31 through the groove 34, so that the clamping plate 33 is clamped in the anti-disengagement groove 32, thereby fixing the drill bit body 31. During the later disassembly and assembly, the external air is connected to the inside of the cylindrical shell 41 by inserting the circular tube into the second duckbill valve 46, so that the hydraulic oil inside the cylindrical shell 41 can be discharged, and the push rod 47 and the inclined plate 48 can be reset. This operation method can provide a disassembly and assembly method for the drill bit body 31 that needs to be replaced, making it convenient to use various models of drill bit bodies 31 and improving the convenience of use.

[0049] In use, the servo motor 22 is started to drive the rotating drum 23 to rotate. The rotating drum 23 rotates inside the servo motor 22 via bearings. The rotating drum 23 drives the chuck 33 to rotate via the rail plate 24. At this time, the chuck 33 drives the drill body 31 to rotate, thereby achieving the effect of using the orthopedic robot-adapted drill bit. During this process, due to the vibration generated by the operation of the servo motor 22 and the working nature of the orthopedic robot-adapted drill bit, wear will occur between the drill body 31 and the chuck 33. This wear will cause a gap to appear between the drill body 31 and the chuck 33. Under the elastic force of the spring 43, the push rod 47 and the inclined plate 48 will keep the chuck 33 in the direction of the drill. In the state of pushing the head body 31 in the direction, the hydraulic oil inside the oil reservoir 42 at the rear end of the first duckbill valve 44 is limited by the first duckbill valve 44, thereby improving the strength of the inclined plate 48 in limiting the clamping plate 33, preventing the clamping plate 33 from moving away from the drill body 31, and improving the stability of the drill body 31 in use. Based on the above principle, the device can prevent the drill bit from becoming loose and shifting due to the wear of the center of the drill bit due to vibration, and can compensate for the gap between the drill body 31 and the fixed structure in real time, that is, prevent the problem of irregular expansion of the drilling diameter. At the same time, it ensures that the preset value of the drilling depth and the actual processing value are within the qualified range, and improves the high-precision adjustment effect of maintaining stability over a long period of time.

[0050] When adjusting the drill bit position, the servo electric cylinder 13 is activated to move the cylinder shell 21. The cylinder shell 21 moves the internal structure simultaneously. At this time, the drill bit body 31 moves inside the assembly cavity 12. During this process, the limiting telescopic rod 15 extends, improving the stability of the drill bit body 31 inside the cylinder shell 21. This achieves the effect of adjusting the length of the drill bit body 31 protruding from the shell 11. This adjustment can be made to finely adjust the protruding length of the drill bit according to the real-time changes in bone hardness during the operation. When encountering dense bone tissue, appropriately shortening the protruding length can reduce the cutting resistance of the drill bit, reduce machine vibration, and further improve the stability of the device.

[0051] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An anti-deviation orthopedic drill bit assembly adapted for orthopedic robots, comprising a housing assembly (1) and a drill bit assembly (3), characterized in that: The housing assembly (1) is equipped with a drive assembly (2) on its inner side. The drill bit assembly (3) is equipped with a stabilizing assembly (4) at one end. The stabilizing assembly (4) includes a cylindrical shell (41). An oil storage tank (42) is opened on the inner side of the cylindrical shell (41). A spring (43) is fixedly connected to the inner side of the oil storage tank (42). A first duckbill valve (44) is fixedly connected to the oil storage tank (42) near the middle. A circular plate (45) is embedded in the inner side of the cylindrical shell (41). A second duckbill valve (46) is fixedly connected to the inner side of the circular plate (45). A push rod (47) is fixedly connected to the end of the spring (43) away from the first duckbill valve (44). A slanted plate (48) is fixedly connected to the end of the push rod (47) away from the spring (43). A sealing ring is fixedly connected to the outer side of the circular plate (45). The circular plate (45) and the cylindrical shell (41) are sealed by the sealing ring. The oil storage tank (42) is filled with hydraulic oil.

2. The anti-deviation orthopedic drill bit assembly based on orthopedic robot adaptation according to claim 1, characterized in that: The housing assembly (1) includes a housing (11), and a cap (14) is threaded to the front end of the housing (11). Both the housing (11) and the cap (14) have an assembly cavity (12) inside.

3. The anti-deviation orthopedic drill bit assembly based on orthopedic robot adaptation according to claim 2, characterized in that: A servo cylinder (13) and a limiting telescopic rod (15) are fixedly connected inside the assembly cavity (12) of the housing (11). A positioning block is fixedly connected to the piston rod end of the servo cylinder (13) and the piston rod end of the limiting telescopic rod (15).

4. The anti-deviation orthopedic drill bit assembly based on orthopedic robot adaptation according to claim 3, characterized in that: The servo electric cylinder (13) and the limiting telescopic rod (15) are both fixedly connected to the cylindrical shell (21) of the drive assembly (2) through the positioning block. The rear end of the cylindrical shell (21) is fixedly connected to the housing of the servo motor (22). The housing of the servo motor (22) is fixedly connected between the assembly cavity (12) opened in the housing (11) with a gap.

5. The anti-deviation orthopedic drill bit assembly based on orthopedic robot adaptation according to claim 4, characterized in that: The inner side of the cylindrical shell (21) is rotatably connected to a rotating drum (23) via a bearing, and the rear end of the rotating drum (23) is fixedly connected to the end of the main shaft of the servo motor (22).

6. The anti-deviation orthopedic drill bit assembly based on orthopedic robot adaptation according to claim 5, characterized in that: The front end of the rotating drum (23) is fixedly connected to a fixing plate (25) by a bracket. The inner side of the fixing plate (25) is fixedly connected to the outer side of the oil storage tank (42). A through hole is opened near the middle of the fixing plate (25).

7. The anti-deviation orthopedic drill bit assembly based on orthopedic robot adaptation according to claim 6, characterized in that: The inner side of the rotating drum (23) is fixedly connected to the rail plate (24), and the inner side of the rail plate (24) is provided with a sliding groove. The rail plate (24) is slidably connected to the slope groove (34) through the sliding groove and the clamping plate (33). The clamping plate (33) is fixedly connected to the outside of the slope groove (34).

8. The anti-deviation orthopedic drill bit assembly based on orthopedic robot adaptation according to claim 7, characterized in that: The clamping plate (33) is held on the outside of the drill body (31) included in the drill assembly (3). The drill body (31) has an anti-disengagement groove (32) near the rear end, and the clamping plate (33) is embedded in the anti-disengagement groove (32).

9. The anti-deviation orthopedic drill bit assembly based on orthopedic robot adaptation according to claim 8, characterized in that: The inner side of the clamping plate (33) is provided with a rail (35), the inside of the rail (35) is in close contact with the inclined surface of the inclined plate (48), and the end of the clamping plate (33) away from the drill bit body (31) is magnetically attracted to the rotating drum (23).

10. An assembly method for an anti-deviation orthopedic drill bit assembly adapted to an orthopedic robot, as described in any one of claims 1-9, characterized in that: Step 1: During installation, remove the cap (14) and the housing (11). The clamping plate (33) is pre-installed in the rail plate (24). With the anti-disengagement groove (32) of the drill bit body (31) facing backward, insert it into the rotating drum (23) through the through hole of the fixing plate (25), so that the anti-disengagement groove (32) is placed between the two clamping plates (33). The compressed spring (43) is used to bring the push rod (47) close to the first duckbill valve (44). Tear open the sealing film at the front end of the cylindrical shell (41), and external air enters to push the push rod ( 47) and the inclined plate (48) move backward. With the help of the sealing structure, the gas in the oil storage tank (42) is slowly discharged. The hydraulic oil enters the oil storage tank (42) through the first duckbill valve (44), which drives the round plate (45) and the second duckbill valve (46) to move. The inclined plate (48) is inserted into the slope groove (34), and the clamping plate (33) is pushed to hold the anti-dislodgement groove (32) to fix the drill bit. When disassembling and assembling, the round pipe is inserted into the second duckbill valve (46) to connect the air and discharge the hydraulic oil so that the push rod (47) can be reset. Step 2: When in use, start the servo motor (22) to drive the drum (23) to rotate, and drive the drill bit body (31) to work through the rail plate (24) and the chuck plate (33). Vibration will cause the drill bit and the chuck plate to wear and create a gap. The spring (43) maintains the pushing force of the push rod (47) and the inclined plate (48) on the chuck plate. The first duckbill valve (44) limits the hydraulic oil to prevent the chuck plate from moving away from the drill bit. Step 3: When adjusting the position of the drill bit, start the servo electric cylinder (13) to drive the cylinder shell (21) and internal structure to move, and extend the limit telescopic rod (15) to prevent shaking, so as to adjust the length of the drill bit protruding from the shell (11) to adapt to the changes in bone hardness during the operation.

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