Machining device with function of preventing bicycle hub from being excessively polished

Abstract

The invention relates to the technical field of bicycle hub machining, in particular to a machining device with a function of preventing a bicycle hub from being excessively polished, which comprises a polishing shaft, a polishing mechanism and two control mechanisms, the grinding mechanism comprises an annular butt-joint plate and two grinding assemblies which are coaxially arranged with the grinding shaft, a partition plate is arranged in the middle of the annular butt-joint plate, and a guide assembly for guiding the two grinding assemblies to move is arranged in the middle of the partition plate; the control mechanism comprises a driving shaft and a fixing structure, the driving shaft is coaxial with the grinding shaft and can move in the axis direction of the grinding shaft, two driving plates connected with the two grinding assemblies correspondingly are arranged at the end of the driving shaft, the two ends of each driving plate are hinged to the driving shaft and the corresponding grinding assembly correspondingly, and the fixing structure is arranged between the two driving plates. The fixing structure is used for fixing an included angle between the two driving plates; the polishing mechanism and the two control mechanisms are arranged, so that the polishing range is fixed, and the inner wall of the bicycle hub is effectively prevented from being excessively polished.

Description

Technical Field

[0001] The invention relates to the technical field of bicycle hub processing, and in particular to a processing device with the function of preventing the bicycle hub from being over-polished. Background Art

[0002] In the field of bicycle manufacturing and maintenance, the hub is a key component connecting the wheel and the frame. Its quality and performance directly affect the driving stability and safety of the whole vehicle. The inner wall of the hub needs to be precisely polished to ensure a close fit with bearings and other components, reduce friction and wear, and extend service life. However, in the traditional bicycle hub polishing process, there is a common technical problem: over-polishing.

[0003] Over-grinding refers to the situation where the inner wall of a bicycle hub is ground beyond the predetermined size requirements due to insufficient control accuracy of the grinding tool or equipment, which results in excessive wear or deformation of the inner wall of the hub. This will not only damage the internal structure of the hub and reduce its mechanical properties, but also affect the installation and matching accuracy of components such as bearings, thereby affecting the driving performance of the entire vehicle. Summary of the invention

[0004] In view of the above problems, a processing device with the function of preventing excessive grinding of a bicycle hub is provided. By setting a grinding mechanism and two control mechanisms, the grinding range is fixed, thereby effectively preventing excessive grinding of the inner wall of the bicycle hub.

[0005] In order to solve the problems of the prior art, the present invention provides a processing device with the function of preventing excessive grinding of a bicycle hub, comprising a grinding shaft, a grinding mechanism arranged in the middle of the grinding shaft and two control mechanisms respectively located on both sides of the grinding mechanism; the grinding mechanism comprises an annular docking plate and two grinding assemblies coaxially arranged with the grinding shaft, a partition is arranged in the middle of the annular docking plate, a guide assembly for guiding the movement of the two grinding assemblies is arranged in the middle of the partition, and the guide assembly enables the grinding assembly to move along the diameter direction of the annular docking plate; the control mechanism comprises a driving shaft and a fixing structure coaxially arranged with the grinding shaft and capable of moving along the axial direction of the grinding shaft, two driving plates respectively connected to the two grinding assemblies are arranged at the end of the driving shaft, the two ends of the driving plate are respectively hinged to the driving shaft and the grinding assembly, the fixing structure is arranged between the two driving plates, and the fixing structure is used to fix the angle between the two driving plates.

[0006] Preferably, the grinding assembly includes a connecting seat and a cutter head assembly slidably connected to the guide assembly; the two ends of the connecting seat are respectively connected to two drive plates in the two control mechanisms; the cutter head assembly includes a mounting column and a grinding knife movably connected to the annular docking plate, and the grinding knife is connected to one end of the mounting column extending out of the annular docking plate.

[0007] Preferably, the guide assembly maintains a first guide rod perpendicular to and fixedly connected to the partition, and rotation limiting assemblies are provided at both ends of the first guide rod. The first guide rod and the rotation limiting assembly are used to limit the degree of freedom of the grinding assembly.

[0008] Preferably, the cutter head assembly further comprises a first spring, the interior of the mounting post is hollow, and the first spring is arranged inside the mounting post.

[0009] Preferably, the control mechanism also includes a driving structure, which includes a sleeve and a first driving component; the sleeve is coaxially arranged with the driving shaft, one end of the driving shaft extends into the sleeve, and the sleeve is fixedly connected to the grinding shaft; the first driving component is arranged inside the sleeve, and the first driving component provides power for the movement of the driving shaft.

[0010] Preferably, the first driving assembly includes a first magnetic ring and a second magnetic ring; the first magnetic ring is coaxially arranged at the open end of the sleeve; the second magnetic ring is coaxially arranged at one end of the driving shaft extending into the sleeve.

[0011] Preferably, a limit ring is coaxially arranged inside the sleeve, and the limit ring limits the movement range of the drive shaft extending into one end of the sleeve to between the limit ring and the closed end of the sleeve.

[0012] Preferably, the driving structure further comprises a buffer assist component, and the buffer assist component is arranged at the closed end inside the sleeve.

[0013] Preferably, the fixed structure includes two docking sleeves, a second drive assembly and a transmission assembly; the two docking sleeves are respectively slidably arranged on the two drive plates; the second drive assembly is arranged on the drive shaft; one end of the transmission assembly is connected to the second drive assembly, and the other end of the transmission assembly is connected to the two docking sleeves.

[0014] Preferably, the second driving assembly includes a sliding sleeve and a third magnetic ring; the sliding sleeve is coaxially arranged with the driving shaft, and the sliding sleeve is movably connected with the driving shaft; and the third magnetic ring is arranged on the sliding sleeve.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention is provided with a grinding mechanism and two control mechanisms. The two grinding assemblies in the grinding mechanism can move smoothly along the diameter direction of the annular docking plate under the action of the guide assembly, thereby ensuring the accuracy and stability of grinding. The driving shaft and two driving plates in the control mechanism convert the linear motion of the driving shaft into radial movement of the two grinding assemblies, thereby realizing dynamic adjustment of the grinding range. The fixed structure in the control mechanism can lock the positions of the two driving plates after the grinding assembly reaches a predetermined position, thereby fixing the grinding range and ensuring the stability of the coverage range of the grinding assembly. The fixed structure can not only fix the position of the driving plate during the grinding process, but also absorb the centrifugal force generated by the rotation of the grinding assembly around the grinding axis, thereby avoiding the influence of the centrifugal force on the grinding process, thereby fixing the grinding range and effectively preventing excessive grinding of the inner wall of the bicycle hub.

[0016] 2. The present invention provides a connecting seat and a cutter head assembly, and the positions of the connecting seat and the grinding knife installed thereon can be adjusted by synchronously moving the driving shafts of the two control mechanisms. The connecting seat is slidably connected to the guide assembly, which ensures the accuracy and stability of the moving direction, so that the grinding assembly can be adjusted in the diameter direction of the annular docking plate, and the grinding assembly can be adjusted within the maximum coverage range to the minimum coverage range, thereby meeting the grinding requirements of bicycle hubs of different sizes, thereby achieving uniform grinding of bicycle hubs of different sizes.

[0017] 3. The present invention provides a first guide rod and two rotation limiting assemblies. The first guide rod serves as a guide and is perpendicular to and fixedly connected to the partition, thereby ensuring the accuracy of the moving direction of the connecting seat, so that the connecting seat can stably move along a predetermined path during sliding, thereby avoiding the problem of uneven grinding or reduced processing accuracy due to directional deviation. The setting of the rotation limiting assembly generates sufficient resistance to the rotation of the connecting seat, thereby ensuring that the grinding knife can only move in a straight line along the axial direction of the first guide rod, thereby improving the processing accuracy of the bicycle hub. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a stereoscopic diagram of a grinding shaft, a grinding mechanism and a control mechanism in a processing device having the function of preventing excessive grinding of a bicycle hub according to the present invention.

[0019] Figure 2 It is a stereoscopic diagram of a grinding mechanism and a control mechanism in a processing device having a function of preventing excessive grinding of a bicycle hub according to the present invention.

[0020] Figure 3 The invention discloses a top view of a grinding shaft, a grinding mechanism and a control mechanism in a processing device having the function of preventing excessive grinding of a bicycle hub.

[0021] Figure 4 yes Figure 3Stereoscopic cross-sectional view at AA in the middle.

[0022] Figure 5 yes Figure 4 A magnified partial view of point B in the middle.

[0023] Figure 6 yes Figure 4 A magnified partial view of point C in the middle.

[0024] Figure 7 It is a stereoscopic diagram of a grinding assembly and a guide assembly in a processing device having the function of preventing excessive grinding of a bicycle hub according to the present invention.

[0025] Figure 8 It is a stereoscopic diagram of a connecting seat, a driving shaft, a driving plate, a driving structure and a fixing structure in a processing device having a function of preventing excessive grinding of a bicycle hub according to the present invention.

[0026] Fig. 9 It is a stereoscopic diagram of a drive shaft, a second magnetic ring and a buffer assist assembly in a processing device having the function of preventing excessive grinding of a bicycle hub according to the present invention.

[0027] Fig.10 The invention discloses a three-dimensional structure of a driving shaft, a driving plate and a fixing structure in a processing device having the function of preventing excessive grinding of a bicycle hub. Figure 1 .

[0028] Fig.11 The invention discloses a three-dimensional structure of a driving shaft, a driving plate and a fixing structure in a processing device having the function of preventing excessive grinding of a bicycle hub. Figure 2 .

[0029] The numbers in the figure are: 1, grinding shaft; 2, grinding mechanism; 21, annular docking plate; 211, partition; 22, grinding assembly; 221, connecting seat; 222, cutter head assembly; 2221, mounting column; 2222, grinding knife; 2223, first spring; 23, guide assembly; 231, first guide rod; 232, rotation limiting assembly; 2321, second guide rod; 3, control mechanism; 31, drive shaft; 32, drive plate; 33, drive structure; 331, sleeve ; 3311, limit ring; 332, first drive assembly; 3321, first magnetic ring; 3322, second magnetic ring; 333, buffer assist assembly; 3331, third guide rod; 3332, limit cover; 3333, second spring; 34, fixed structure; 341, docking sleeve; 342, second drive assembly; 3421, sliding sleeve; 3422, third magnetic ring; 343, transmission assembly; 3431, transmission plate; 3432, linkage plate; 3433, connecting column. DETAILED DESCRIPTION

[0030] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0031] Reference Figures 1 to 11 As shown: a processing device with the function of preventing excessive grinding of a bicycle hub, comprising a grinding shaft 1, a grinding mechanism 2 arranged in the middle of the grinding shaft 1, and two control mechanisms 3 respectively located on both sides of the grinding mechanism 2; the grinding mechanism 2 comprises an annular docking plate 21 and two grinding assemblies 22 coaxially arranged with the grinding shaft 1, a partition 211 is arranged in the middle of the annular docking plate 21, a guide assembly 23 for guiding the movement of the two grinding assemblies 22 is arranged in the middle of the partition 211, and the guide assembly 23 enables the grinding assemblies 22 to move along the diameter direction of the annular docking plate 21; the control mechanism 3 comprises a driving shaft 31 and a fixing structure 34 coaxially arranged with the grinding shaft 1 and capable of moving along the axial direction of the grinding shaft 1, two driving plates 32 respectively connected to the two grinding assemblies 22 are arranged at the end of the driving shaft 31, two ends of the driving plate 32 are respectively hinged to the driving shaft 31 and the grinding assembly 22, the fixing structure 34 is arranged between the two driving plates 32, and the fixing structure 34 is used to fix the angle between the two driving plates 32.

[0032] The bicycle hub has bearing cavities at both ends and a cavity in the middle. During the working process, the bicycle hub is first fixed to ensure that the axis of the bicycle hub coincides with the axis of the grinding shaft 1. Then, the grinding shaft 1 moves along its own axis, and one end of the grinding shaft 1 passes from one end of the bicycle hub to the other end of the bicycle hub. The grinding shaft 1 is prevented from shaking during the rotation process by limiting measures. At this time, the grinding mechanism 2 is aligned with one end of the bicycle hub to prepare for grinding the bearing cavity of the bicycle hub. The two control mechanisms 3 are started synchronously, and the drive shaft The two driving plates 32 convert the linear motion of the driving shaft 31 into the movement of the two grinding assemblies 22 along the diameter direction of the guide assembly 23. Since the control mechanisms 3 on both sides of the grinding assembly 22 work synchronously, the grinding assembly 22 is ensured to be balanced and move smoothly. When the diameter of the rotation coverage range of the grinding assembly 22 matches the inner diameter of the bearing cavity of the shaft 1 to be polished, the driving shaft 31 stops moving, and the fixing structure 34 starts to lock the position of the two driving plates 32. At this time, if the grinding assembly 22 is subjected to the centrifugal force generated by the rotation, the grinding assembly 22 is The force will be transmitted to the driving plate 32 and absorbed by the fixing structure 34, preventing it from being further transmitted to the driving shaft 31, preventing the driving shaft 31 from moving along the axis again. If it is necessary to grind the cavity in the middle of the bicycle hub, the fixing structure 34 releases the fixing of the driving plate 32, and the driving shaft 31 moves away from the annular docking plate 21 along the grinding axis 1. The driving plate 32 pulls the grinding assembly 22 to move inside the annular docking plate 21. When the diameter covered by the grinding assembly 22 matches the inner diameter of the cavity, the fixing structure 34 fixes the position of the driving plate 32 again to prevent the grinding assembly from 22 moves due to centrifugal force, ensuring that the coverage range of the grinding component 22 is stable. Finally, the two control mechanisms 3 adjust the position of the grinding component 22 again to grind the bearing cavity at the other end of the bicycle hub. The device adjusts the position of the grinding component 22 through the two control mechanisms 3 and the guide component 23 to ensure that the grinding component 22 moves smoothly. At the same time, the fixed structure 34 is used to fix the position of the two drive plates 32 to absorb the centrifugal force generated by the rotation of the grinding component 22 around the grinding axis 1, thereby fixing the grinding range and effectively preventing excessive grinding of the inner wall of the bicycle hub.

[0033] Reference Figure 2 , Figure 5 and Figure 7 As shown: the grinding assembly 22 includes a connecting seat 221 and a cutter head assembly 222 which are slidably connected to the guide assembly 23; the two ends of the connecting seat 221 are respectively connected to the two driving plates 32 in the two control mechanisms 3; the cutter head assembly 222 includes a mounting column 2221 and a grinding knife 2222 which are movably connected to the annular docking plate 21, and the grinding knife 2222 is connected to one end of the mounting column 2221 extending out of the annular docking plate 21.

[0034] During operation, when the driving shafts 31 of the two control mechanisms 3 move toward the annular docking plate 21 at the same time, the two driving plates 32 will synchronously apply driving force to the two sides of the connecting seat 221. At this time, the connecting seat 221 is subjected to a combined force along the direction of the guide assembly 23 and pointing to the outside of the annular docking plate 21, pushing the mounting column 2221 to move along the guide direction of the guide assembly 23. The movement of the mounting column 2221 then drives the grinding knife 2222 to move synchronously until the connecting seat 221 contacts the annular docking plate 21. At this time, the grinding assembly 22 reaches its maximum coverage range. On the contrary, when the two driving shafts 31 move away from the annular docking plate 21 at the same time, the connecting seat 2 21 will be subjected to a combined force along the direction of the guide assembly 23 and directed to the inside of the annular docking plate 21. Driven by this force, the connecting seat 221 will drive the mounting column 2221 and the grinding knife 2222 to move toward the inside of the annular docking plate 21. When the connecting seat 221 is in full contact with the partition 211 and the grinding knife 2222 is still outside the annular docking plate 21, the grinding assembly 22 reaches its minimum coverage range, and the fixing structure 34 fixes the position of the grinding assembly 22 by fixing the positions of the two drive plates 32. Therefore, the grinding assembly 22 can be fixed at any position within the adjustment range, thereby achieving uniform grinding of bicycle hubs of different sizes.

[0035] Reference Figure 2 , Figure 5 and Figure 7 As shown: the guide assembly 23 maintains a first guide rod 231 perpendicular to the partition 211 and fixedly connected to the partition 211, and rotation limiting assemblies 232 are provided at both ends of the first guide rod 231. The first guide rod 231 and the rotation limiting assembly 232 are used to limit the degree of freedom of the grinding assembly 22.

[0036] Specifically, the rotation limiting assembly 232 includes a plurality of second guide rods 2321, the axes of the plurality of second guide rods 2321 are parallel to the axis of the first guide rod 231, and the second guide rods 2321 are installed on the peripheral wall of the first guide rod 231, the connecting seat 221 is slidingly connected to the first guide rod 231, and a plurality of first sliding grooves matching the plurality of second guide rods 2321 are opened on the inner wall of the connecting seat 221.

[0037] During operation, the connecting seat 221 slides along the first guide rod 231. The first guide rod 231 serves as a guide to ensure the accuracy of the moving direction of the connecting seat 221. However, due to the possible deviations in the processing accuracy and assembly accuracy of the parts, as well as the resistance of the bicycle hub to the grinding knife 2222 during the grinding process, the connecting seat 221 may rotate slightly and unexpectedly around the axis of the first guide rod 231, which will directly affect the processing accuracy of the grinding knife 2222 on the bicycle hub. Therefore, a rotation limiting assembly 232 is provided at both ends of the first guide rod 231. When the connecting seat 221 slides along the first guide rod 231, the multiple second guide rods 2321 in the rotation limiting assembly 232 will be respectively stuck in their corresponding first sliding grooves. Through the close fit between the first sliding grooves and the second guide rods 2321, resistance is generated for the rotation of the connecting seat 221. This resistance effectively prevents the unexpected rotation of the connecting seat 221 around the axis of the first guide rod 231, ensuring that the grinding knife 2222 can only move in a straight line along the axis of the first guide rod 231 without any rotation around the axis, thereby improving the processing accuracy of the bicycle hub.

[0038] Reference Figure 5 As shown, the cutter head assembly 222 further includes a first spring 2223 . The interior of the mounting column 2221 is hollow, and the first spring 2223 is disposed inside the mounting column 2221 .

[0039] In the working process, the driving shaft 31 drives the two grinding assemblies 22 to move toward the middle of the annular docking plate 21 through the two driving plates 32. As the movement proceeds, the angle between the two driving plates 32 gradually decreases until the two grinding assemblies 22 are in contact with the partition 211. At this time, the angle reaches a minimum value. When the driving shaft 31 moves in the opposite direction and pushes the two grinding assemblies 22 toward the outside of the annular docking plate 21 through the two driving plates 32, at this time, the grinding assemblies 22 are mainly subjected to a force perpendicular to the direction of the partition 211, while the component force along the axial direction of the first guide rod 231 is relatively small. Therefore, it is difficult to directly push the grinding assemblies 22 to move smoothly. By setting a first spring 2223 in the mounting column 2221, the grinding assemblies 2 During the movement toward the annular docking plate 21, one end of the first spring 2223 will gradually contact the end of the first guide rod 231. As the grinding assembly 22 continues to move, the first spring 2223 is gradually compressed between the mounting post 2221 and the first guide rod 231 to store elastic potential energy. When it is necessary to drive the grinding assembly 22 away from the annular docking plate 21, the first spring 2223 releases its stored elastic potential energy to generate a force on the mounting post 2221 in the same direction as the component force along the direction of the first guide rod 231 on the connecting seat 221. The grinding assembly 22 is simultaneously subjected to the combined effect of the direct thrust from the driving plate 32 and the elastic thrust of the first spring 2223, which improves the response speed of the grinding assembly 22.

[0040] Reference Figure 2 , Figure 4 and Figure 6 As shown: the control mechanism 3 also includes a driving structure 33, and the driving structure 33 includes a sleeve 331 and a first driving component 332; the sleeve 331 is coaxially arranged with the driving shaft 31, one end of the driving shaft 31 extends into the sleeve 331, and the sleeve 331 is fixedly connected to the grinding shaft 1; the first driving component 332 is arranged inside the sleeve 331, and the first driving component 332 provides power for the driving shaft 31 to move.

[0041] The sleeve 331 limits the movement of the drive shaft 31, so that the drive shaft 31 keeps moving in the axial direction of the grinding shaft 1, and the two drive plates 32 can simultaneously apply force to the two grinding components 22. When it is necessary to drive the grinding component 22 to extend out of the annular docking plate 21, the first drive component 332 applies a thrust toward the outside of the sleeve 331 to the drive shaft 31, pushing the drive shaft 31 to move toward the outside of the sleeve 331. When it is necessary to drive the grinding component 22 to move toward the inside of the annular docking plate 21, the first drive component 332 applies a pulling force toward the inside of the sleeve 331 to the drive shaft 31, pulling the drive shaft 31 back to the inside of the sleeve 331, thereby achieving the purpose of controlling the movement of the grinding component 22 by controlling the movement of the drive shaft 31.

[0042] Reference Figure 4 and Figure 6 As shown: the first driving assembly 332 includes a first magnetic ring 3321 and a second magnetic ring 3322 ; the first magnetic ring 3321 is coaxially arranged at the open end of the sleeve 331 ; the second magnetic ring 3322 is coaxially arranged at one end of the driving shaft 31 extending into the sleeve 331 .

[0043] When the first magnetic ring 3321 and the second magnetic ring 3322 are both energized magnetic rings, when it is necessary to push the drive shaft 31 out of the sleeve 331, the magnetism of the first magnetic ring 3321 and the second magnetic ring 3322 are adjusted to be opposite, and suction is generated between the first magnetic ring 3321 and the second magnetic ring 3322. Since the position of the first magnetic ring 3321 is fixed, the second magnetic ring 3322 moves toward the first magnetic ring 3321, and at the same time, the second magnetic ring 3322 drives the drive shaft 31 to extend out of the sleeve 331. When it is necessary to pull the drive shaft 31 back into the sleeve 331, the magnetism of the first magnetic ring 3321 and the second magnetic ring 3322 are adjusted to be opposite, and suction is generated between the first magnetic ring 3321 and the second magnetic ring 3322. Repulsion, the second magnetic ring 3322 moves away from the first magnetic ring 3321, and at the same time, the second magnetic ring 3322 drives the driving shaft 31 to be retracted into the sleeve 331. When the first magnetic ring 3321 is a magnetically fixed magnetic ring and the second magnetic ring 3322 is a magnetic ring that can be electrified, the moving direction of the driving shaft 31 is adjusted by changing the magnetism of the second magnetic ring 3322. When the first magnetic ring 3321 is a magnetic ring that can be electrified and the second magnetic ring 3322 is a magnetically fixed magnetic ring, the moving direction of the driving shaft 31 is adjusted by changing the magnetism of the first magnetic ring 3321. By adjusting the magnetism of the first magnetic ring 3321 and the second magnetic ring 3322, the moving position and speed of the driving shaft 31 can be controlled to meet the requirements of machining accuracy.

[0044] Reference Figure 6 As shown: a limiting ring 3311 is coaxially arranged inside the sleeve 331 , and the limiting ring 3311 limits the movement range of the end of the drive shaft 31 extending into the sleeve 331 to between the limiting ring 3311 and the closed end of the sleeve 331 .

[0045] When the magnetism of the first magnetic ring 3321 and the second magnetic ring 3322 are set to be opposite, an attractive force will be generated between the two, prompting the second magnetic ring 3322 and the attached drive shaft 31 to move toward the first magnetic ring 3321. If the movement of the second magnetic ring 3322 is not restricted, the second magnetic ring 3322 may continue to move until it directly contacts the first magnetic ring 3321. Therefore, a limit ring 3311 is provided to prevent the movement of the second magnetic ring 3322. In another case, when the magnetism of the first magnetic ring 3321 and the second magnetic ring 3322 are set to be the same, a repulsive force will be generated between the two, resulting in the second magnetic ring 3321 and the second magnetic ring 3322 being attracted to each other. The magnetic ring 3322 and the attached drive shaft 31 move toward the closed end of the sleeve 331. If the movement of the second magnetic ring 3322 is not restricted, the second magnetic ring 3322 may continue to apply tension to the drive shaft 31 until the grinding assembly 22 is in close contact with the partition 211. In this case, if the tension is not terminated in time, the drive plate 32 may be subjected to excessive stress, thereby affecting its service life and performance. Therefore, the closed end of the sleeve 331 can effectively limit the displacement of the drive shaft 31, prevent damage to the drive plate 32 due to continuous tension, and thus avoid component damage caused by excessive movement.

[0046] Reference Figure 4 , Figure 6 and Fig. 9 As shown, the driving structure 33 further includes a buffer assist component 333 , and the buffer assist component 333 is arranged at the closed end inside the sleeve 331 .

[0047] Specifically, the buffer assist assembly 333 includes a third guide rod 3331, a limit cover 3332 and a second spring 3333. The third guide rod 3331 is coaxially arranged with the sleeve 331, and one end of the third guide rod 3331 extends out of the sleeve 331. The limit cover 3332 is connected to the other end of the third guide rod 3331. The second spring 3333 is sleeved on the third guide rod 3331, and both ends of the second spring 3333 are respectively connected to the limit cover 3332 and the closed end of the sleeve 331.

[0048] When the second magnetic ring 3322 moves toward the closed end of the sleeve 331 due to magnetic repulsion, if the buffer assisting assembly 333 is not provided, the second magnetic ring 3322 may hit the closed end of the sleeve 331 at a higher speed. Therefore, the buffer assisting assembly 333 is provided. When the second magnetic ring 3322 approaches the closed end of the sleeve 331, the second magnetic ring 3322 will first contact the limit cover 3332. The force exerted on the limit cover 3332 will be transmitted to the third guide rod 3331, prompting the third guide rod 3331 to move along the sleeve 331. 1 axis direction, with the movement of the third guide rod 3331, the second spring 3333 sleeved on the third guide rod 3331 is gradually compressed to store energy. In this process, the reaction force exerted by the second spring 3333 on the limiting cover 3332 is gradually increased, so that the moving speed of the limiting cover 3332 and the second magnetic ring 3322 abutting against the limiting cover 3332 is gradually reduced. Finally, the limiting cover 3332 contacts the closed end of the sleeve 331 at a relatively low speed, thereby achieving effective buffering of high-speed impact.

[0049] Reference Figure 8 , Fig.10 and Fig.11 As shown: the fixed structure 34 includes two docking sleeves 341, a second drive assembly 342 and a transmission assembly 343; the two docking sleeves 341 are respectively slidably arranged on the two drive plates 32; the second drive assembly 342 is arranged on the drive shaft 31; one end of the transmission assembly 343 is connected to the second drive assembly 342, and the other end of the transmission assembly 343 is connected to the two docking sleeves 341.

[0050] Specifically, the transmission assembly 343 includes a transmission plate 3431, a linkage plate 3432 and two connecting columns 3433. One end of the transmission plate 3431 is connected to the second drive assembly 342, and the other end of the transmission plate 3431 is connected to the middle of the linkage plate 3432. A second sliding groove is provided on the linkage plate 3432. The two connecting columns 3433 are respectively connected to the two docking sleeves 341, and the two connecting columns 3433 are both slidably set in the second sliding groove.

[0051] When the driving shaft 31 moves toward the annular docking plate 21, the angle between the two driving plates 32 at the ends of the driving shaft 31 increases, and the second driving component 342 drives the two docking sleeves 341 to move away from the annular docking plate 21 through the transmission plate 3431, the linkage plate 3432 and the two connecting columns 3433. When the two docking sleeves 341 abut against each other, the two docking sleeves 341 cannot continue to move along their respective corresponding driving plates 32. At this time, the second driving component 342 stops applying tension to the two docking sleeves 341. When the driving shaft 31 needs to move away from the annular docking plate 21, the second driving component 342 first drives the two docking sleeves 341 to move toward the annular docking plate 21. At this time, the two driving plates 32 can change under the action of the driving shaft 31. When the angle adjustment between the two driving plates 32 is completed, the second driving component 342 drives the two docking sleeves 341 to move in the opposite direction through the transmission component 343 until they abut against each other, thereby fixing the two driving plates 32 again, thereby fixing the two driving plates 32 in different states.

[0052] Reference Fig.10 and Fig.11 As shown, the second driving assembly 342 includes a sleeve 3421 and a third magnetic ring 3422 ; the sleeve 3421 is coaxially arranged with the driving shaft 31 , and the sleeve 3421 is movably connected with the driving shaft 31 ; the third magnetic ring 3422 is arranged on the sleeve 3421 .

[0053] The third magnetic ring 3422 is an energized magnetic ring. When the second driving component 342 needs to drive the two docking sleeves 341 to fix the angle between the two driving plates 32, the magnetism of the third magnetic ring 3422 is adjusted to be opposite to the first magnetic ring 3321. At this time, the third magnetic ring 3422 moves toward the first magnetic ring 3321, and the third magnetic ring 3422 drives the two docking sleeves 341 to move toward the intersection of the two driving plates 32 through the sliding sleeve 3421 and the transmission component 343. When the second driving component 342 needs to drive the two docking sleeves 341 to move away from each other along the two driving plates 32, the magnetism of the third magnetic ring 3422 is adjusted to be opposite to the first magnetic ring 3321. The third magnetic ring 3422 pushes the two docking sleeves 341 to move away from each other along the two driving plates 32 through the sliding sleeve 3421 and the transmission component 343, thereby realizing the operation of the fixed structure 34 driven by the linkage of the first driving component 332 and the second driving component 342.

[0054] The above embodiments only express one or several implementation modes of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for those of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A processing device capable of preventing excessive grinding of a bicycle hub, comprising a grinding shaft (1), characterized in that: It also includes a grinding mechanism (2) arranged in the middle of the grinding shaft (1) and two control mechanisms (3) respectively located on both sides of the grinding mechanism (2); The grinding mechanism (2) comprises an annular butt joint plate (21) and two grinding assemblies (22) arranged coaxially with the grinding shaft (1); a partition plate (211) is arranged in the middle of the annular butt joint plate (21); a guide assembly (23) for guiding the movement of the two grinding assemblies (22) is arranged in the middle of the partition plate (211); the guide assembly (23) enables the grinding assemblies (22) to move along the diameter direction of the annular butt joint plate (21); The control mechanism (3) comprises a drive shaft (31) coaxially arranged with the grinding shaft (1) and movable along the axis direction of the grinding shaft (1) and a fixing structure (34); two drive plates (32) respectively connected to two grinding assemblies (22) are arranged at the end of the drive shaft (31); two ends of the drive plate (32) are respectively hinged to the drive shaft (31) and the grinding assembly (22); the fixing structure (34) is arranged between the two drive plates (32); and the fixing structure (34) is used to fix the angle between the two drive plates (32).

2. A processing device with the function of preventing excessive grinding of a bicycle hub according to claim 1, characterized in that: The grinding assembly (22) comprises a connecting seat (221) and a cutter head assembly (222) which are slidably connected to the guide assembly (23); Two ends of the connecting seat (221) are respectively connected to two driving plates (32) in two control mechanisms (3); The cutter head assembly (222) comprises a mounting column (2221) movably connected to the annular docking plate (21) and a grinding knife (2222); the grinding knife (2222) is connected to one end of the mounting column (2221) extending out of the annular docking plate (21).

3. A processing device with the function of preventing excessive grinding of a bicycle hub according to claim 1, characterized in that: The guide assembly (23) maintains a first guide rod (231) which is perpendicular to and fixedly connected to the partition (211), and rotation limiting assemblies (232) are provided at both ends of the first guide rod (231). The first guide rod (231) and the rotation limiting assembly (232) are used to limit the degree of freedom of the grinding assembly (22).

4. A processing device capable of preventing excessive grinding of a bicycle hub according to claim 2, characterized in that: The cutter head assembly (222) further comprises a first spring (2223); the interior of the mounting column (2221) is hollow, and the first spring (2223) is arranged inside the mounting column (2221).

5. The processing device having the function of preventing excessive grinding of a bicycle hub according to claim 1, characterized in that: The control mechanism (3) further comprises a driving structure (33), wherein the driving structure (33) comprises a sleeve (331) and a first driving assembly (332); The sleeve (331) is coaxially arranged with the drive shaft (31), one end of the drive shaft (31) extends into the sleeve (331), and the sleeve (331) is fixedly connected to the grinding shaft (1); The first driving assembly (332) is arranged inside the sleeve (331), and the first driving assembly (332) provides power for driving the shaft (31) to move.

6. A processing device capable of preventing excessive grinding of a bicycle hub according to claim 5, characterized in that: The first driving component (332) comprises a first magnetic ring (3321) and a second magnetic ring (3322); The first magnetic ring (3321) is coaxially arranged at the open end of the sleeve (331); The second magnetic ring (3322) is coaxially arranged at one end of the drive shaft (31) extending into the sleeve (331).

7. The processing device having the function of preventing excessive grinding of a bicycle hub according to claim 5, characterized in that: A limiting ring (3311) is coaxially arranged inside the sleeve (331), and the limiting ring (3311) limits the range of motion of the end of the drive shaft (31) extending into the sleeve (331) to between the limiting ring (3311) and the closed end of the sleeve (331).

8. The processing device with the function of preventing excessive grinding of bicycle hubs according to claim 5, characterized in that: The driving structure (33) further comprises a buffer assisting component (333), wherein the buffer assisting component (333) is arranged at a closed end inside the sleeve (331).

9. The processing device with the function of preventing excessive grinding of bicycle hubs according to claim 1, characterized in that: The fixed structure (34) comprises two docking sleeves (341), a second driving assembly (342) and a transmission assembly (343); The two docking sleeves (341) are respectively slidably disposed on the two driving plates (32); The second driving assembly (342) is arranged on the driving shaft (31); One end of the transmission assembly (343) is connected to the second driving assembly (342), and the other end of the transmission assembly (343) is connected to the two docking sleeves (341).

10. A processing device capable of preventing excessive grinding of a bicycle hub according to claim 9, characterized in that: The second driving assembly (342) comprises a sliding sleeve (3421) and a third magnetic ring (3422); The sliding sleeve (3421) is coaxially arranged with the driving shaft (31), and the sliding sleeve (3421) is movably connected with the driving shaft (31); The third magnetic ring (3422) is arranged on the sliding sleeve (3421).

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