Drilling mechanism for magnetic part

Abstract

The utility model relates to the technical field of magnet machining, and particularly discloses a drilling mechanism for a magnetic part, which comprises a main shaft mechanism and a transmission assembly, and the main shaft mechanism is used for clamping an external magnetic part; the transmission assembly comprises a first bearing and a damping structure, the first bearing is arranged on the main shaft mechanism, and the main shaft mechanism is rotationally connected with an external rack through the first bearing; the damping structure comprises a pull ring arranged on the main shaft mechanism in a sleeving mode, and a second bearing is arranged between the pull ring and the main shaft mechanism. The main shaft mechanism is arranged to clamp the magnetic part, so that the magnetic part is stably clamped, the main shaft mechanism is rotationally connected with the rack through the transmission assembly, the punching stability is improved, the punching precision is improved, the shock absorption structure can effectively absorb and disperse impact force and vibration force, and the stability of the system is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of magnet processing, and in particular discloses a drilling mechanism for magnetic parts. Background Art

[0002] NdFeB permanent magnets refer to magnets that can maintain their magnetism for a long time. Permanent magnets are hard magnets that are not easy to lose magnetism or be magnetized. When in use, permanent magnets often need to be cut into the required shape and size. Sometimes holes are drilled in the permanent magnets as needed to facilitate use, so a punching device is used.

[0003] The existing processing method is manual processing. When punching, the punching device often needs to manually twist the handle to clamp the permanent magnet. However, the manual clamping and fixing effect is not good and it is easy to cause deflection, which affects the punching effect and affects the accuracy and stability of the NdFeB permanent magnet. Utility Model Content

[0004] In order to overcome the shortcomings and deficiencies in the prior art, the utility model aims to provide a drilling mechanism with good clamping and fixing effect, not prone to deflection, and high drilling accuracy.

[0005] To achieve the above-mentioned purpose, the utility model provides a drilling mechanism for magnetic parts, including a spindle mechanism and a transmission assembly, wherein the spindle mechanism is used to clamp external magnetic parts; the transmission assembly includes a first bearing and a shock-absorbing structure, wherein the first bearing is arranged on the spindle mechanism, and the spindle mechanism is rotatably connected to an external frame via the first bearing; the shock-absorbing structure includes a pull ring sleeved on the spindle mechanism, and a second bearing is arranged between the pull ring and the spindle mechanism. The utility model clamps the magnetic parts firmly by arranging a spindle mechanism to clamp the magnetic parts, and the spindle mechanism is rotatably connected to the frame via the transmission assembly, thereby improving the drilling stability and thus the drilling accuracy, and the shock-absorbing structure can effectively absorb and disperse the impact force and vibration force, thereby improving the stability of the system, and the shock-absorbing structure can effectively absorb and disperse the impact force and vibration force, thereby improving the stability of the system.

[0006] Furthermore, the number of the first bearings is two groups, and the two groups of first bearings are respectively located in the middle of the main shaft mechanism and the end away from the pull ring. By arranging two groups of first bearings on the main shaft mechanism, the support stability of the rotating shaft can be increased. This can effectively disperse the load on the shaft and ensure that the rotating shaft remains balanced and stable during rotation; at the same time, the dual-bearing design can improve the reliability of the mechanical system. If one bearing fails, the other bearing can still provide support to keep the mechanical system running, which increases the fault tolerance of the system and reduces the downtime caused by single point failures.

[0007] Furthermore, the shock absorbing structure also includes a fixed shaft and a push motor, the fixed shaft is fixedly connected to the external frame, one end of the pull ring is connected to the fixed shaft via a fisheye bearing, and the other end of the pull ring is connected to the output end of the push motor via a fisheye bearing. Due to its design characteristics, the fisheye bearing can effectively absorb and disperse the impact force and vibration force, thereby reducing the impact of the force transmitted to other parts of the mechanical system and improving the stability of the system; at the same time, the self-centering property and high load-bearing capacity of the fisheye bearing help to maintain the balance and stability of the main shaft and reduce the instability factors of the main shaft mechanism caused by impact and vibration.

[0008] Furthermore, the spindle mechanism is provided with an expansion ring, and the second bearing is connected to the spindle mechanism via the expansion ring, and the expansion ring is used to limit the displacement of the second bearing. The expansion ring is used to clamp the second bearing on the spindle mechanism to ensure that it can be tightly connected and transmit torque during rotation, which helps to reduce looseness and relative sliding during rotation, thereby reducing vibration and noise levels; at the same time, the expansion ring can evenly distribute the load between the spindle mechanism and the second bearing, reduce local stress concentration, and thus increase the service life of mechanical parts.

[0009] Furthermore, an annular groove around the central axis of the expansion ring is provided on the outer wall of the expansion ring, an axial retaining ring is provided in the annular groove, and the axial retaining ring cooperates with the expansion ring to clamp the second bearing. The axial retaining ring can effectively prevent the second bearing on the spindle mechanism from axially moving or sliding during operation by providing additional friction and clamping force.

[0010] Furthermore, the spindle mechanism is provided with a pulley, which is connected to the output end of the external drive motor via a belt. The transmission pulley is usually made of high-strength material, has good wear resistance and corrosion resistance, can withstand heavy loads and high-speed operation, has a long service life, and is easy to check, lubricate and replace regularly to maintain its normal operation and extend its service life.

[0011] Furthermore, one end of the pulley is fixedly connected to the spindle mechanism via a bolt, and a locking nut is provided at the other end of the pulley, and the bolt and the locking nut cooperate to fix the pulley. Additional locking force is provided on the bolted pulley to prevent the pulley from loosening or falling off by itself under vibration or other external forces, thereby enhancing the safety and reliability of the connection, helping to extend the service life of the connection, reducing the frequency of maintenance and replacement, and being suitable for applications that need to work in a high vibration environment.

[0012] Furthermore, the spindle mechanism includes a sleeve, a clamp and a pull rod. The sleeve is rotatably mounted on an external frame via a first bearing, and the sleeve is a cylinder with openings at both ends. The clamp is movably arranged in the sleeve, and the pull rod is fixedly connected to the clamp. The clamp has a clamping part that can expand and retract and is also used to clamp the magnetic part. The pull rod slides relative to the sleeve, and the sleeve is used to contact the outer side of the clamping part so that the clamping part clamps the external magnetic part.

[0013] Furthermore, the clamp includes a cylindrical connecting portion, a conical clamping portion, the connecting portion is fixedly connected to the pull rod, and the clamping portion is provided with a plurality of clamping cone blocks in an annular array, and the plurality of clamping cone blocks are surrounded by a mounting hole for placing the external magnetic part. Through the relative sliding of the sleeve and the pull rod, the inner wall of the sleeve contacts the conical clamping portion, compressing the clamping portion to contract, thereby clamping the external magnetic part. The structure is simple, and the clamp can be quickly clamped and released, thereby improving the clamping speed of the magnetic part.

[0014] Furthermore, the inner wall of one end of the sleeve close to the clamp is provided with a tapered hole adapted to the clamping part, and the inner hole side of the tapered hole is used to abut against the clamping cone block so that multiple clamping cone blocks are close to each other to clamp the magnetic part. The tapered hole and the conical clamping part are installed in coordination, and the sleeve provides guidance and positioning for the movement of the clamp, which can help the clamp to be accurately and quickly centered, and improve the clamping efficiency and stability of the magnetic part; at the same time, the conical clamping part design makes clamping and releasing the magnetic part more convenient and quick, and the operator only needs to simply place the magnetic part on the clamping part of the clamp, and the clamp can automatically clamp it. When releasing the magnetic part, it is only necessary to release the clamping force of the clamp, and the magnetic part can be easily removed from the clamping part, thereby improving production efficiency.

[0015] The beneficial effects of the utility model are as follows: the utility model clamps the magnetic part by arranging a spindle mechanism to clamp the magnetic part, so that the magnetic part is clamped firmly, the spindle mechanism is rotatably connected with the frame via a transmission assembly, the drilling stability is improved, thereby improving the drilling accuracy, and the shock-absorbing structure can effectively absorb and disperse the impact force and vibration force, thereby improving the stability of the system; the fisheye bearing can effectively absorb and disperse the impact force and vibration force due to its design characteristics, thereby reducing the influence of the impact force and vibration force transmitted to other components of the mechanical system, and improving the stability of the system; at the same time, the self-centering property and high load-bearing capacity of the fisheye bearing help to maintain the balance and stability of the spindle, and reduce the instability factors caused by the impact and vibration of the spindle mechanism; the tapered hole and the tapered clamping part are installed in coordination, and the shaft sleeve provides guidance and positioning for the movement of the fixture, which can help the fixture to be accurately and quickly centered, and improve the clamping efficiency and stability of the magnetic part; at the same time, the design of the tapered clamping part makes it more convenient and quick to clamp and release the magnetic part, and the operator only needs to simply place the magnetic part on the clamping part of the fixture, and the fixture can automatically clamp it. When releasing the magnetic part, it is only necessary to release the clamping force of the fixture, and the magnetic part can be easily removed from the clamping part, thereby improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural schematic diagram of a drilling mechanism for a magnetic component of the utility model;

[0017] Figure 2 It is a structural schematic diagram of the shock absorbing structure of the utility model;

[0018] Figure 3 It is a cross-sectional view of a drilling mechanism for a magnetic part of the utility model;

[0019] Figure 4 It is a structural schematic diagram of the clamp of the utility model;

[0020] Figure 5 This is an exploded view of the tensioning assembly of the utility model;

[0021] Figure 6 It is a schematic structural diagram of the pulling claw of the utility model.

[0022] Reference numerals include:

[0023] 1. Spindle mechanism; 2. Transmission assembly; 3. First bearing; 4. Shock-absorbing structure; 5. Pull ring; 6. Second bearing; 7. Fixed shaft; 8. Push motor; 9. Expanding ring; 10. Pulley; 11. Bushing; 12. Clamp; 13. Pull rod; 14. Clamping part; 15. Connecting part; 16. Mounting hole; 17. Conical hole; 18. Mounting groove; 19. Tensioning assembly; 20. First pull body; 21. Second pull body; 22. Pull claw; 23. Pin shaft; 24. Mounting part; 25. Resistance part; 26. Push ring DETAILED DESCRIPTION

[0024] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose of the utility model, the specific implementation method, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0025] See also Figures 1 to 6 As shown, a drilling mechanism for magnetic parts of the utility model includes a spindle mechanism 1 and a transmission assembly 2. The spindle mechanism 1 is used to clamp external magnetic parts; the transmission assembly 2 includes a first bearing 3 and a shock absorbing structure 4. The first bearing 3 is arranged on the spindle mechanism 1, and the spindle mechanism 1 is rotatably connected to an external frame via the first bearing 3; the shock absorbing structure 4 includes a pull ring 5 sleeved on the spindle mechanism 1, and a second bearing 6 is arranged between the pull ring 5 and the spindle mechanism 1. The utility model clamps the magnetic parts firmly by arranging the spindle mechanism 1 to clamp the magnetic parts, and the spindle mechanism 1 is rotatably connected to the frame via the transmission assembly 2, thereby improving the drilling stability and thus improving the drilling accuracy.

[0026] In this embodiment, the spindle mechanism 1 clamps the external magnetic part, and the external drive motor drives the spindle mechanism 1 to rotate. The spindle mechanism 1 is rotatably connected to the external frame via the first bearing 3, so that the rotation of the spindle mechanism 1 is stable, thereby improving the punching accuracy. The shock absorbing structure 4 can effectively absorb and disperse the impact force and vibration force, thereby improving the stability of the system.

[0027] The number of the first bearings 3 is two groups, and the two groups of first bearings 3 are respectively located in the middle of the sleeve 11 and the end away from the pull ring 5. By arranging two groups of first bearings 3 on the spindle mechanism 1, the support stability of the rotating shaft can be increased. This can effectively disperse the load on the shaft and ensure that the rotating shaft remains balanced and stable during rotation; at the same time, the double bearing design can improve the reliability of the mechanical system. If one bearing fails, the other bearing can still provide support to keep the mechanical system running, which increases the fault tolerance of the system and reduces the downtime caused by single point failures.

[0028] The shock absorbing structure 4 also includes a fixed shaft 7 and a push motor 8. The fixed shaft 7 is fixedly connected to the external frame. One end of the pull ring 5 is connected to the fixed shaft 7 via a fisheye bearing, and the other end of the pull ring 5 is connected to the output end of the push motor 8 via a fisheye bearing. Due to its design characteristics, the fisheye bearing can effectively absorb and disperse the impact force and vibration force, thereby reducing the impact of the force transmitted to other components of the mechanical system and improving the stability of the system; at the same time, the self-centering property and high load-bearing capacity of the fisheye bearing help to maintain the balance and stability of the spindle, and reduce the instability factors of the spindle mechanism 1 caused by impact and vibration.

[0029] The spindle mechanism 1 is provided with an expansion ring 9, and the second bearing 6 is connected to the spindle mechanism 1 via the expansion ring 9, and the expansion ring 9 is used to limit the displacement of the second bearing 6. The expansion ring 9 is used to clamp the second bearing 6 on the spindle mechanism 1 to ensure that it can be tightly connected and transmit torque during rotation, which helps to reduce looseness and relative sliding during rotation, thereby reducing vibration and noise levels; at the same time, the expansion ring 9 can evenly distribute the load between the spindle mechanism 1 and the second bearing 6, reduce local stress concentration, and thus increase the service life of mechanical parts.

[0030] An annular groove around the central axis of the expansion ring 9 is provided on the outer wall of the expansion ring 9, and an axial retaining ring is provided in the annular groove, and the axial retaining ring cooperates with the expansion ring 9 to clamp the second bearing 6. The axial retaining ring can effectively prevent the second bearing 6 on the spindle mechanism 1 from axial movement or sliding during operation by providing additional friction and clamping force.

[0031] The spindle mechanism 1 is provided with a pulley 10, which is connected to the output end of the driving motor via a belt. The transmission pulley 10 is usually made of high-strength material, has good wear resistance and corrosion resistance, can withstand heavy loads and high-speed operation, has a long service life, and is easy to check, lubricate and replace regularly to maintain its normal operation and extend its service life.

[0032] One end of the pulley 10 is fixedly connected to the spindle mechanism 1 via a bolt, and a locking nut is provided at the other end of the pulley 10, and the bolt and the locking nut cooperate to fix the pulley 10. An additional locking force is provided on the bolted pulley 10 to prevent the pulley 10 from loosening or falling off by itself under vibration or other external forces, thereby enhancing the safety and reliability of the connection, helping to extend the service life of the connection, reducing the frequency of maintenance and replacement, and being suitable for applications that need to work in a high vibration environment.

[0033] The spindle mechanism 1 includes a sleeve 11, a clamp 12 and a pull rod 13. The sleeve 11 is rotatably mounted on an external frame via a first bearing 3. The sleeve 11 is a cylinder with openings at both ends. The clamp 12 is movably arranged in the sleeve 11. The pull rod 13 is fixedly connected to the clamp 12. The clamp 12 has a clamping portion 14 that can expand and contract and is also used to clamp a magnetic component. The pull rod 13 slides relative to the sleeve 11. The sleeve 11 is used to contact the outer side of the clamping portion 14 so that the clamping portion 14 clamps the external magnetic component.

[0034] The clamp 12 includes a cylindrical connecting portion 15, a clamping portion 14 is conical, the connecting portion 15 is fixedly connected to the pull rod 13, and the clamping portion 14 is provided with a plurality of clamping cone blocks in an annular array, and the plurality of clamping cone blocks are surrounded by a mounting hole 16 for placing an external magnetic component. Through the relative sliding of the sleeve 11 and the pull rod 13, the inner wall of the sleeve 11 contacts the conical clamping portion 14, pressing the clamping portion 14 to contract, thereby clamping the external magnetic component. The structure is simple, and the clamp 12 can be quickly clamped and released, thereby improving the clamping speed of the magnetic component.

[0035] The inner wall of one end of the sleeve 11 close to the clamp 12 is provided with a tapered hole 17 adapted to the clamping portion 14, and the inner hole side of the tapered hole 17 is used to abut against the clamping cone block so that multiple clamping cone blocks are close to each other to clamp the magnetic part. The conical clamping portion 14 provides guidance and positioning for the movement of the clamp 12, which can help the clamp 12 to be accurately and quickly centered, and improve the clamping efficiency and stability of the magnetic part; at the same time, the design of the conical clamping portion 14 makes clamping and releasing the magnetic part more convenient and quick. The operator only needs to simply place the magnetic part in the mounting hole 16, and the clamp 12 can automatically clamp it. When releasing the magnetic part, it is only necessary to release the clamping force of the clamp 12, and the magnetic part can be easily removed from the clamping portion 14, thereby improving production efficiency.

[0036] A mounting groove 18 is formed between two adjacent clamping cone blocks, and the mounting groove 18 is provided with multiple groups, and the multiple groups of mounting grooves 18 are cross-arranged, and the mounting hole 16 is located at the intersection of the mounting grooves 18. Multiple groups of mounting grooves 18 provide a larger contact area and a closer contact, thereby increasing the stability between the clamp 12 and the magnetic part. This helps prevent the magnetic part from moving or twisting during the processing, ensuring the accuracy and quality of the processing.

[0037] In a further technical solution, the mounting grooves 18 are provided in multiple groups, the multiple groups of mounting grooves 18 are cross-arranged, and the mounting holes 16 are located at the intersections of the mounting grooves 18. The multiple groups of mounting grooves 18 provide a larger contact area and a closer contact, thereby increasing the stability between the clamp 12 and the magnetic member. This helps prevent the magnetic member from moving or twisting during processing, ensuring the accuracy and quality of processing.

[0038] In the present technical solution, two groups of mounting grooves 18 are provided, and the two groups of mounting grooves 18 are cross-arranged on the clamping portion 14 , and the mounting hole 16 is located at the intersection of the two groups of mounting grooves 18 .

[0039] In a further technical solution, the spindle mechanism 1 further includes a tensioning assembly 19 , which is mounted on the shaft sleeve 11 and fixedly connected to the pull rod 13 , and the tensioning assembly 19 drives the pull rod 13 to slide relative to the shaft sleeve 11 .

[0040] The tensioning assembly 19 includes a first pulling body 20 connected to the sleeve 11, a second pulling body 21 connected to the pull rod 13, and a pulling claw 22; the pulling claw 22 is rotatably mounted on the second pulling body 21, and the reciprocating pulling claw 22 is used to limit or release the first pulling body 20, and the rotating pulling claw 22 separates the first pulling body 20 and the second pulling body 21 from each other, driving the pull rod 13 to slide relative to the sleeve 11. The design of the tensioning assembly 19 is usually simple and clear, so that the operator can quickly and easily clamp and release the magnetic part, which saves operation time and improves clamping efficiency; at the same time, the pulling claw 22 can control the size of the clamping force by adjusting the rotation angle, and the operator can adjust the size of the clamping force according to the specific processing requirements and the characteristics of the magnetic part, which can meet the needs of different processing tasks and ensure that the clamping force of the clamp 12 on the magnetic part is just right.

[0041] The second puller 21 is a circular ring structure sleeved on the pull shaft, and a rectangular notch is provided at one end of the second puller 21 close to the first puller 20; one end of the pull claw 22 extends into the notch to contact the first puller 20. The rectangular notch can ensure that the pull claw 22 is firmly mounted on the outer wall of the second puller 21, thereby improving the fixing stability of the pull claw 22. This fixing method can effectively prevent the pull claw 22 from moving or loosening during the processing, ensuring the stability and accuracy of the processing.

[0042] The pull claw 22 is a long strip structure, and a mounting portion 24 for mounting the pin shaft 23 is provided in the middle of the pull claw 22. A through hole is provided on the mounting portion 24, and the pin shaft 23 passes through the through hole so that the pull claw 22 is rotatably connected to the second pull body 21. The pull claw 22 is a lever structure, and a large clamping force can be applied with a small force, which means that even if the operator applies a small force, sufficient clamping force can be generated to fix the magnetic part, thereby ensuring the stability and accuracy of the processing process.

[0043] The pulling claw 22 is provided with a resisting portion 25 protruding from the mounting portion 24 , and the resisting portion 25 is used to resist the first pulling body 20 .

[0044] The pulling claws 22 are provided in multiple groups, and the multiple groups of pulling claws 22 are distributed in a circular array around the central axis of the second pulling body 21. Multiple groups of pulling claws 22 can clamp multiple parts of the magnetic part at the same time, thereby improving the clamping stability of the magnetic part on the device. This helps to ensure that the magnetic part maintains a stable position during the processing, and avoids the movement or distortion of the magnetic part due to uneven clamping; at the same time, multiple groups of pulling claws 22 can distribute the clamping force on multiple points of the magnetic part instead of concentrating it on one point. This helps to reduce deformation or damage caused by uneven clamping force and ensures the stability and precision of the magnetic part during the processing.

[0045] In this technical solution, the pulling claws 22 are provided in three groups, and the three groups of pulling claws 22 are distributed in a ring array around the central axis of the second pulling body 21. This helps to reduce deformation or damage caused by uneven clamping force and ensures the stability and accuracy of the magnetic part during processing.

[0046] The tensioning assembly 19 further includes a push ring 26, which is sleeved on the second pulling body 21, and the pull claw 22 is driven to rotate relative to the second pulling body 21 by sliding the push ring 26. The design structure of the push ring 26 is relatively simple, easy to operate, and does not require complicated adjustment and setting; at the same time, the clamping and releasing operations of the push ring 26 are relatively fast, which can effectively save clamping time and improve processing efficiency.

[0047] In this embodiment, the external magnetic part is placed in the mounting hole 16 of the clamp 12, and the push ring 26 is slid. The push ring 26 contacts the pull claw 22, and the pull claw 22 rotates relative to the second pulling body 21 via the pin shaft 23. The contact portion 25 of the pull claw 22 pushes the first pulling body 20, driving the first pulling body 20 away from the second pulling body 21, driving the pull rod 13 to slide relative to the sleeve 11, and the pull rod 13 drives the clamp 12 to slide into the sleeve 11. The inner wall of the sleeve 11 contacts the clamping portion 14 of the clamp 12, and the clamping portion 14 contracts to clamp the external magnetic part. The driving motor drives the spindle mechanism 1 to drive the magnetic part to rotate, and the tool mechanism approaches the magnetic part and drills. After the drilling is completed, the driving motor stops running, and the tensioning assembly 19 drives the pull rod 13 to slide in the opposite direction relative to the sleeve 11, and the clamp 12 slides out of the sleeve 11, and the clamp 12 releases the magnetic part.

[0048] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A drilling mechanism for magnetic parts, Features: The invention comprises a main shaft mechanism (1) and a transmission assembly (2), wherein the main shaft mechanism (1) is used for clamping an external magnetic component; the transmission assembly (2) comprises a first bearing (3) and a shock absorbing structure (4), wherein the first bearing (3) is arranged on the main shaft mechanism (1), and the main shaft mechanism (1) is rotatably connected to an external frame via the first bearing (3); the shock absorbing structure (4) comprises a pull ring (5) sleeved on the main shaft mechanism (1), and a second bearing (6) is arranged between the pull ring (5) and the main shaft mechanism (1).

2. A drilling mechanism for a magnetic member according to claim 1, Features: The number of the first bearings (3) is two groups, and the two groups of first bearings (3) are respectively located in the middle of the main shaft mechanism (1) and at the end away from the pull ring (5).

3. A drilling mechanism for a magnetic member according to claim 1, Features: The shock absorbing structure (4) further comprises a fixed shaft (7) and a push motor (8); the fixed shaft (7) is fixedly connected to the external frame; one end of the pull ring (5) is connected to the fixed shaft (7) via a fisheye bearing; and the other end of the pull ring (5) is connected to the output end of the push motor (8) via a fisheye bearing.

4. A drilling mechanism for a magnetic member according to claim 3, Features: The main shaft mechanism (1) is provided with an expansion ring (9), and the second bearing (6) is connected to the main shaft mechanism (1) via the expansion ring (9), and the expansion ring (9) is used to limit the displacement of the second bearing (6).

5. A drilling mechanism for a magnetic member according to claim 4, Features: An annular groove is provided on the outer wall of the expansion ring (9) around the central axis of the expansion ring (9), and an axial retaining ring is provided in the annular groove. The axial retaining ring cooperates with the expansion ring (9) to clamp the second bearing (6).

6. A drilling mechanism for a magnetic member according to claim 1, Features: The main shaft mechanism (1) is sleeved with a pulley (10), and the pulley (10) is drivingly connected to the output end of an external drive motor via a belt.

7. A drilling mechanism for a magnetic member according to claim 6, Features: One end of the pulley (10) is fixedly connected to the main shaft mechanism (1) via a bolt, and the other end of the pulley (10) is provided with a locking nut, and the bolt and the locking nut cooperate to fix the pulley (10).

8. A drilling mechanism for a magnetic member according to claim 1, Features: The spindle mechanism (1) comprises a shaft sleeve (11), a clamp (12) and a pull rod (13); the shaft sleeve (11) is rotatably mounted on an external frame via a first bearing (3); the shaft sleeve (11) is a cylinder with two ends open; the clamp (12) is movably arranged in the shaft sleeve (11); the pull rod (13) is fixedly connected to the clamp (12); the clamp (12) has a clamping portion (14) that can expand and contract and is also used to clamp a magnetic component; the pull rod (13) slides relative to the shaft sleeve (11); the shaft sleeve (11) is used to abut against the outer side of the clamping portion (14) so ​​that the clamping portion (14) clamps the external magnetic component.

9. A drilling mechanism for a magnetic member according to claim 8, Features: The clamp (12) comprises a cylindrical connecting portion (15), the clamping portion (14) is conical, the connecting portion (15) is fixedly connected to the pull rod (13), and the clamping portion (14) is provided with a plurality of clamping cone blocks in a ring array, and the plurality of clamping cone blocks are surrounded to form a mounting hole (16) for placing an external magnetic component.

10. A drilling mechanism for a magnetic member according to claim 9, Features: The inner wall of one end of the shaft sleeve (11) close to the clamp (12) is provided with a tapered hole (17) matched with the clamping portion (14), and the inner hole side surface of the tapered hole (17) is used to abut against the clamping cone block so that the plurality of clamping cone blocks are brought close to each other to clamp the magnetic member.

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