A processing device with the function of preventing excessive grinding of bicycle hubs

Abstract

The present invention relates to the technical field of bicycle hub processing, and specifically relates to a processing device with a function of preventing excessive grinding of bicycle hubs, which includes a grinding shaft, a grinding mechanism, and two control mechanisms; the grinding mechanism includes an annular docking plate coaxially arranged with the grinding shaft and two grinding components. A partition is arranged in the middle of the annular docking plate, and a guiding component for guiding the movement of the two grinding components is arranged in the middle of the partition; the control mechanism includes a driving shaft coaxially arranged with the grinding shaft and capable of moving along the axis direction of the grinding shaft and a fixing structure. Two driving plates respectively connecting the two grinding components 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 component. The fixing structure is arranged between the two driving plates, and the fixing structure is used to fix the included angle between the two driving plates; the present invention sets the grinding mechanism and two control mechanisms, thereby fixing the grinding range and effectively preventing excessive grinding of the inner wall of the bicycle hub.

Description

Technical Field

[0001] The present invention relates to the technical field of bicycle hub processing, and particularly to a processing device with a function of preventing excessive grinding of bicycle hubs. Background Art

[0002] In the field of bicycle manufacturing and maintenance, the hub, as a key component connecting the wheel and the frame, directly affects the driving stability and safety of the whole vehicle in terms of its quality and performance. The inner wall of the hub needs to be precisely ground to ensure a tight fit with components such as bearings, reduce friction and wear, and extend the service life. However, in the traditional grinding process of bicycle hubs, there is a common technical problem: excessive grinding.

[0003] Excessive grinding means that when grinding the inner wall of a bicycle hub, due to insufficient control precision of the grinding tool or equipment, the grinding range exceeds the predetermined dimensional requirements, resulting in excessive wear or deformation of the inner wall of the hub. This not only damages the internal structure of the hub, reduces its mechanical performance, but also affects the installation and fitting precision of components such as bearings, and further affects the driving performance of the whole vehicle. Summary of the Invention

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

[0005] To solve the problems of the prior art, the present invention provides a processing device with a function of preventing excessive grinding of bicycle hubs, including a grinding shaft, and further including a grinding mechanism disposed in the middle of the grinding shaft and two control mechanisms respectively located on both sides of the grinding mechanism; the grinding mechanism includes an annular docking plate coaxially arranged with the grinding shaft and two grinding components, a partition is arranged in the middle of the annular docking plate, a guiding component for guiding the movement of the two grinding components is arranged in the middle of the partition, and the guiding component enables the grinding components to move along the diameter direction of the annular docking plate; the control mechanism includes a driving shaft coaxially arranged with the grinding shaft and capable of moving along the axis direction of the grinding shaft and a fixing structure, two driving plates respectively connecting the two grinding components are arranged at the end of the driving shaft, both ends of the driving plate are respectively hinged to the driving shaft and the grinding component, and the fixing structure is arranged between the two driving plates and is used for fixing the included angle between the two driving plates.

[0006] Preferably, the grinding component includes a connecting seat slidably connected to the guiding component and a cutter head component; both ends of the connecting seat are respectively connected to the two driving plates in the two control mechanisms; the cutter head component includes a mounting post movably connected to the annular docking plate and a grinding cutter, and the grinding cutter is connected to one end of the mounting post extending out of the annular docking plate.

[0007] Preferably, the guiding assembly holds a first guide rod that is perpendicular to the partition board and fixedly connected to the partition board. Rotation limiting assemblies are provided at both ends of the first guide rod. The first guide rod and the rotation limiting assemblies are used to limit the degrees of freedom of the grinding assembly.

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

[0009] Preferably, the control mechanism further includes a driving structure. The driving structure includes a sleeve and a first driving assembly. 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 assembly is arranged inside the sleeve and provides the power for the driving shaft to move.

[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 the end of the driving shaft that extends into the sleeve.

[0011] Preferably, a limiting ring is coaxially arranged inside the sleeve. The limiting ring limits the movement range of the end of the driving shaft extending into the sleeve between the limiting ring and the closed end of the sleeve.

[0012] Preferably, the driving structure further includes a buffer assisting assembly, and the buffer assisting assembly is arranged at the closed end inside the sleeve.

[0013] Preferably, the fixing structure includes two docking sleeves, a second driving assembly, and a transmission assembly. The two docking sleeves are respectively slidably arranged on the two driving plates. The second driving assembly is arranged on the driving shaft. One end of the transmission assembly is connected to the second driving 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 is movably connected to the driving shaft. The third magnetic ring is arranged on the sliding sleeve.

[0015] The beneficial effects of the present invention compared with the prior art are:

[0016] 1. The present invention is provided with a grinding mechanism and two control mechanisms. The two grinding components in the grinding mechanism can move smoothly along the diameter direction of the annular docking plate under the action of the guiding component, ensuring the accuracy and stability of grinding. In the control mechanism, the driving shaft and the two driving plates convert the linear motion of the driving shaft into the radial movement of the two grinding components, realizing the dynamic adjustment of the grinding range. The fixing structure in the control mechanism can lock the positions of the two driving plates after the grinding components reach the predetermined positions, fix the grinding range, and ensure the stability of the coverage range of the grinding components. The fixing structure can not only fix the positions of the driving plates during the grinding process, but also absorb the centrifugal force generated by the rotation of the grinding components around the grinding shaft, 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.

[0017] 2. The present invention is provided with a connecting seat and a cutter head component. By synchronously moving the driving shafts of the two control mechanisms, the position of the connecting seat and the grinding cutter mounted thereon can be adjusted. The connecting seat is slidably connected to the guiding component, ensuring the accuracy and stability of the moving direction, enabling the grinding component to be adjusted in the diameter direction of the annular docking plate, and enabling the grinding component to be adjusted within the maximum coverage range to the minimum coverage range, meeting the grinding requirements of bicycle hubs of different sizes, thereby realizing uniform grinding of bicycle hubs of different sizes.

[0018] 3. The present invention is provided with a first guide rod and two rotation limiting components. The first guide rod serves as a guide, is perpendicular to the partition plate and fixedly connected to the partition plate, ensuring the accuracy of the moving direction of the connecting seat, enabling the connecting seat to move stably along a predetermined path during the sliding process, and avoiding problems such as uneven grinding or reduced processing accuracy caused by direction deviation. The setting of the rotation limiting components generates sufficient resistance to the rotation of the connecting seat, ensuring that the grinding cutter can only perform linear motion along the axis direction of the first guide rod, thereby improving the processing accuracy of the bicycle hub. Brief Description of the Drawings

[0019] Figure 1 is a perspective view of the grinding shaft, grinding mechanism and control mechanism in a processing device with a function of preventing excessive grinding of bicycle hubs according to the present invention.

[0020] Figure 2 is a perspective view of the grinding mechanism and control mechanism in a processing device with a function of preventing excessive grinding of bicycle hubs according to the present invention.

[0021] Figure 3 is a top view of the grinding shaft, grinding mechanism and control mechanism in a processing device with a function of preventing excessive grinding of bicycle hubs according to the present invention.

[0022] Figure 4 is Figure 3Stereoscopic sectional view at A-A in [the figure].

[0023] Figure 5 is Figure 4 Partial enlarged view at B in [the figure].

[0024] Figure 6 is Figure 4 Partial enlarged view at C in [the figure].

[0025] Figure 7 is a perspective view of the grinding assembly and the guiding assembly in a processing device with the function of preventing excessive grinding of bicycle hubs according to the present invention.

[0026] Figure 8 is a perspective view of the connecting seat, the driving shaft, the driving plate, the driving structure and the fixing structure in a processing device with the function of preventing excessive grinding of bicycle hubs according to the present invention.

[0027] Figure 9 is a perspective view of the driving shaft, the second magnetic ring and the buffer boosting assembly in a processing device with the function of preventing excessive grinding of bicycle hubs according to the present invention.

[0028] Figure 10 is a perspective view of the driving shaft, the driving plate and the fixing structure in a processing device with the function of preventing excessive grinding of bicycle hubs according to the present invention Figure 1 .

[0029] Figure 11 is a perspective view of the driving shaft, the driving plate and the fixing structure in a processing device with the function of preventing excessive grinding of bicycle hubs according to the present invention Figure 2 .

[0030] The reference numerals in the figure are: 1, grinding shaft; 2, grinding mechanism; 21, annular docking plate; 211, partition plate; 22, grinding assembly; 221, connecting seat; 222, cutter head assembly; 2221, mounting column; 2222, grinding cutter; 2223, first spring; 23, guiding assembly; 231, first guide rod; 232, rotation limiting assembly; 2321, second guide rod; 3, control mechanism; 31, driving shaft; 32, driving plate; 33, driving structure; 331, sleeve; 3311, limiting ring; 332, first driving assembly; 3321, first magnetic ring; 3322, second magnetic ring; 333, buffer boosting assembly; 3331, third guide rod; 3332, limiting cover; 3333, second spring; 34, fixing structure; 341, docking sleeve; 342, second driving assembly; 3421, sliding sleeve; 3422, third magnetic ring; 343, transmission assembly; 3431, transmission plate; 3432, linkage plate; 3433, connecting column. Detailed implementation mode

[0031] To further understand the features, technical means, specific purposes, and functions achieved by the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0032] Referring to Figures 1 to 11 As shown: A processing device with a function of preventing excessive grinding of a bicycle hub includes a grinding shaft 1, and further includes a grinding mechanism 2 disposed 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 includes an annular docking plate 21 coaxially arranged with the grinding shaft 1 and two grinding components 22, a partition plate 211 is arranged in the middle of the annular docking plate 21, a guiding component 23 for guiding the movement of the two grinding components 22 is arranged in the middle of the partition plate 211, and the guiding component 23 enables the grinding components 22 to move along the diameter direction of the annular docking plate 21; the control mechanism 3 includes a driving shaft 31 coaxially arranged with the grinding shaft 1 and capable of moving along the axial direction of the grinding shaft 1 and a fixing structure 34, two driving plates 32 respectively connecting the two grinding components 22 are arranged at the end of the driving shaft 31, both ends of the driving plate 32 are hinged to the driving shaft 31 and the grinding component 22 respectively, the fixing structure 34 is arranged between the two driving plates 32, and the fixing structure 34 is used to fix the included angle between the two driving plates 32.

[0033] The bicycle hub has bearing cavities at both ends and a cavity in the middle. During operation, first, the bicycle hub is fixed to ensure that the axis of the bicycle hub coincides with the axis of the grinding shaft 1. Subsequently, the grinding shaft 1 moves along its own axis. One end of the grinding shaft 1 passes through one end of the bicycle hub to the other end, and a limiting measure is used to prevent the grinding shaft 1 from shaking during rotation. At this time, the grinding mechanism 2 is aligned with one end of the bicycle hub and is ready to grind the bearing cavity of the bicycle hub. Two control mechanisms 3 are started synchronously, and the drive shaft 31 moves along the axis of the grinding shaft 1. The linear motion of the drive shaft 31 is converted into the movement of two grinding components 22 along the diameter direction of the guiding component 23 through two drive plates 32. Since the control mechanisms 3 on both sides of the grinding component 22 work synchronously, it ensures that the grinding component 22 is balanced in force and moves smoothly. When the diameter of the rotation coverage range of the grinding component 22 matches the inner diameter of the bearing cavity to be ground, the drive shaft 31 stops moving, and the fixing structure 34 is activated to lock the positions of the two drive plates 32. At this time, if the grinding component 22 is subjected to the centrifugal force generated by rotation, this force will be transmitted to the drive plate 32 and absorbed by the fixing structure 34, preventing it from being further transmitted to the drive shaft 31 and avoiding the drive 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 fixation of the drive plate 32, and the drive shaft 31 moves away from the annular docking plate 21 along the direction of the grinding shaft 1. The drive plate 32 pulls the grinding component 22 to move into the annular docking plate 21. When the diameter covered by the rotation of the grinding component 22 matches the inner diameter of the cavity, the fixing structure 34 fixes the position of the drive plate 32 again to prevent the grinding component 22 from moving due to centrifugal force and ensure the stability of the coverage range of the grinding component 22. 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. This device adjusts the position of the grinding component 22 through two control mechanisms 3 and the guiding component 23 to ensure the smooth movement of the grinding component 22. At the same time, the fixing structure 34 is used to fix the positions of the two drive plates 32 and absorb the centrifugal force generated by the rotation of the grinding component 22 around the grinding shaft 1, thereby fixing the grinding range and effectively preventing excessive grinding of the inner wall of the bicycle hub.

[0034] Refer to Figure 2 、 Figure 5 and Figure 7 As shown: The grinding component 22 includes a connecting seat 221 slidably connected to the guiding component 23 and a cutter head component 222; both ends of the connecting seat 221 are respectively connected to the two drive plates 32 in the two control mechanisms 3; the cutter head component 222 includes a mounting post 2221 movably connected to the annular docking plate 21 and a grinding cutter 2222, and the grinding cutter 2222 is connected to one end of the mounting post 2221 extending out of the annular docking plate 21.

[0035] During the working process, when the drive shafts 31 of the two control mechanisms 3 move simultaneously towards the annular docking plate 21, the two drive plates 32 will simultaneously apply driving forces to both sides of the connecting seat 221. At this time, the connecting seat 221 is subjected to a resultant force acting along the direction of the guiding component 23 and pointing outside the annular docking plate 21, which pushes the mounting post 2221 to move along the guiding direction of the guiding component 23. The movement of the mounting post 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 component 22 reaches its maximum coverage range. On the contrary, when the two drive shafts 31 move away from the annular docking plate 21 simultaneously, the connecting seat 221 will be subjected to a resultant force acting along the direction of the guiding component 23 and pointing inside the annular docking plate 21. Driven by this force, the connecting seat 221 will drive the mounting post 2221 and the grinding knife 2222 to move towards the inside of the annular docking plate 21 together. When the connecting seat 221 is in full contact with the partition plate 211 and the grinding knife 2222 is still outside the annular docking plate 21, the grinding component 22 reaches its minimum coverage range, and the fixing structure 34 fixes the position of the grinding component 22 by fixing the positions of the two drive plates 32. Therefore, the grinding component 22 can be fixed at any position within the adjustment range, so as to achieve uniform grinding of bicycle hubs of different sizes.

[0036] Refer to Figure 2 、 Figure 5 and Figure 7 As shown: The guiding component 23 holds the first guide rod 231 that is perpendicular to the partition plate 211 and fixedly connected to the partition plate 211. Rotation limiting components 232 are arranged at both ends of the first guide rod 231. The first guide rod 231 and the rotation limiting components 232 are used to limit the degrees of freedom of the grinding component 22.

[0037] Specifically, the rotation limiting component 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 slidably connected to the first guide rod 231, and a plurality of first chutes that cooperate with the plurality of second guide rods 2321 are provided on the inner wall of the connecting seat 221.

[0038] During the working process, the connecting seat 221 slides along the first guide rod 231. Guided by the first guide rod 231, the accuracy of the moving direction of the connecting seat 221 is ensured. However, due to possible deviations in the machining accuracy and assembly accuracy of the components, as well as the resistance generated by the bicycle hub during the grinding process on the grinding tool 2222, the connecting seat 221 may undergo slight unexpected rotation around the axis of the first guide rod 231, which will directly affect the machining accuracy of the grinding tool 2222 on the bicycle hub. Therefore, rotation limiting components 232 are provided at both ends of the first guide rod 231. When the connecting seat 221 slides along the first guide rod 231, multiple second guide rods 2321 in the rotation limiting components 232 will be respectively stuck in their corresponding first chutes. Through the tight fit between the first chutes and the second guide rods 2321, resistance is generated to 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 tool 2222 can only perform linear motion along the axis direction of the first guide rod 231 without any rotation around this axis, thereby improving the machining accuracy of the bicycle hub.

[0039] Refer to Figure 5 As shown: The tool tip assembly 222 further includes a first spring 2223. The inside of the mounting post 2221 is hollow, and the first spring 2223 is arranged inside the mounting post 2221.

[0040] In the work process, the drive shaft 31 drives two grinding components 22 to move towards the middle of the annular docking plate 21 through two drive plates 32. As the movement progresses, the angle between the two drive plates 32 gradually decreases until both grinding components 22 reach the abutting state with the partition plate 211. At this time, the angle reaches the minimum value. When the drive shaft 31 moves in the reverse direction and pushes the two grinding components 22 to move towards the outside of the annular docking plate 21 through the two drive plates 32, since the grinding component 22 is mainly subjected to the force perpendicular to the direction of the partition plate 211 at this time, and the component force along the axis direction of the first guide rod 231 is relatively small, it is difficult to directly push the grinding component 22 to move smoothly. By arranging the first spring 2223 in the mounting column 2221, during the process of the grinding component 22 moving towards 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 component 22 continues to move, the first spring 2223 is gradually compressed between the mounting column 2221 and the first guide rod 231, storing elastic potential energy. When it is necessary to drive the grinding component 22 away from the annular docking plate 21, the first spring 2223 releases the elastic potential energy it stores, generating a force on the mounting column 2221 that is in the same direction as the component force received by the connecting seat 221 along the direction of the first guide rod 231. The grinding component 22 is simultaneously affected by the direct thrust from the drive plate 32 and the elastic thrust of the first spring 2223, these two co-directional acting forces, thereby improving the response speed of the movement of the grinding component 22.

[0041] Refer to Figure 2 、 Figure 4 and Figure 6 As shown in: The control mechanism 3 further includes a drive structure 33, and the drive structure 33 includes a sleeve 331 and a first drive 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 drive assembly 332 is arranged inside the sleeve 331, and the first drive assembly 332 provides the power for the movement of the drive shaft 31.

[0042] The sleeve 331 plays a limiting role in the movement of the drive shaft 31, enabling the drive shaft 31 to move in the axial direction of the grinding shaft 1 so that the two drive plates 32 can simultaneously exert forces on 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 assembly 332 exerts a thrust on the drive shaft 31 towards the outside of the sleeve 331, pushing the drive shaft 31 to move towards the outside of the sleeve 331. When it is necessary to drive the grinding component 22 to move towards the inside of the annular docking plate 21, the first drive assembly 332 exerts a pulling force on the drive shaft 31 towards the inside of the sleeve 331, pulling the drive shaft 31 back into 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.

[0043] Refer to Figure 4 and Figure 6 As shown: The first driving component 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.

[0044] When both the first magnetic ring 3321 and the second magnetic ring 3322 are energizable magnetic rings, when it is necessary to push the driving shaft 31 out of the sleeve 331, the magnetisms of the first magnetic ring 3321 and the second magnetic ring 3322 are adjusted to be opposite, and an attractive force 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 towards the first magnetic ring 3321. At the same time, the second magnetic ring 3322 drives the driving shaft 31 to extend out of the sleeve 331. When it is necessary to pull the driving shaft 31 into the sleeve 331, the magnetisms of the first magnetic ring 3321 and the second magnetic ring 3322 are adjusted to be opposite, and a repulsive force is generated between the first magnetic ring 3321 and the second magnetic ring 3322. The second magnetic ring 3322 moves away from the first magnetic ring 3321. At the same time, the second magnetic ring 3322 drives the driving shaft 31 to be pulled into the sleeve 331. When the first magnetic ring 3321 is a magnetic ring with fixed magnetism and the second magnetic ring 3322 is an energizable magnetic ring, 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 an energizable magnetic ring and the second magnetic ring 3322 is a magnetic ring with fixed magnetism, the moving direction of the driving shaft 31 is adjusted by changing the magnetism of the first magnetic ring 3321. By adjusting the magnetisms of the first magnetic ring 3321 and the second magnetic ring 3322, the control of the moving position and speed of the driving shaft 31 is realized, meeting the requirements of processing accuracy.

[0045] Refer to Figure 6 As shown: A limiting ring 3311 is coaxially arranged inside the sleeve 331, and the movement range of one end of the driving shaft 31 extending into the sleeve 331 is limited between the limiting ring 3311 and the closed end of the sleeve 331.

[0046] When the magnetisms of the first magnetic ring 3321 and the second magnetic ring 3322 are set to be opposite, an attractive force will be generated between them, prompting the second magnetic ring 3322 and its attached drive shaft 31 to move towards 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 comes into direct contact with 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 magnetisms 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 them, causing the second magnetic ring 3322 and its attached drive shaft 31 to move towards 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 continuously apply a pulling force to the drive shaft 31 until the grinding assembly 22 is in close contact with the partition 211. In this case, if the pulling force is not terminated in time, it may cause the drive plate 32 to bear 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, preventing damage to the drive plate 32 caused by continuous pulling force, and thus avoiding component damage caused by excessive movement.

[0047] Refer to Figure 4 , Figure 6 and Figure 9 As shown: The drive 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.

[0048] Specifically, the buffer assist component 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.

[0049] When the second magnetic ring 3322 moves towards the closed end of the sleeve 331 due to magnetic repulsion, if the buffer assisting component 333 is not provided, the second magnetic ring 3322 may impact the closed end of the sleeve 331 at a relatively high speed. Therefore, the buffer assisting component 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 limiting cover 3332. The force received by the limiting cover 3332 will be transmitted to the third guide rod 3331, prompting the third guide rod 3331 to move outward along the axial direction of the sleeve 331. As the third guide rod 3331 moves, the second spring 3333 sleeved on the third guide rod 3331 is gradually compressed to store energy. During this process, the reaction force exerted by the second spring 3333 on the limiting cover 3332 gradually increases, causing the moving speeds of the limiting cover 3332 and the second magnetic ring 3322 in contact with the limiting cover 3332 to gradually decrease. Finally, the limiting cover 3332 contacts the closed end of the sleeve 331 at a relatively low speed, thus achieving effective buffering for high-speed impact.

[0050] Refer to Figure 8 、 Figure 10 and Figure 11 As shown: The fixing structure 34 includes two docking sleeves 341, a second driving component 342, and a transmission component 343; the two docking sleeves 341 are respectively slidably arranged on the two driving plates 32; the second driving component 342 is arranged on the driving shaft 31; one end of the transmission component 343 is connected to the second driving component 342, and the other end of the transmission component 343 is connected to the two docking sleeves 341.

[0051] Specifically, the transmission component 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 driving component 342, the other end of the transmission plate 3431 is connected to the middle of the linkage plate 3432. A second sliding groove is formed 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 arranged in the second sliding groove.

[0052] When the drive shaft 31 moves towards the annular docking plate 21, the angle between the two drive plates 32 at the end of the drive shaft 31 increases. The second drive assembly 342 drives the two docking sleeves 341 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 drive plates 32. At this time, the second drive assembly 342 stops applying a pulling force to the two docking sleeves 341. When the drive shaft 31 needs to move away from the annular docking plate 21, the second drive assembly 342 first drives the two docking sleeves 341 to move towards the annular docking plate 21. At this time, the two drive plates 32 can change under the action of the drive shaft 31. After the angle between the two drive plates 32 is adjusted, the second drive assembly 342 drives the two docking sleeves 341 to move in the reverse direction through the transmission assembly 343 until they abut against each other, and the fixation of the two drive plates 32 in different states is realized again, so as to realize the fixation of the two drive plates 32 in different states.

[0053] Refer to Figure 10 and Figure 11 As shown: The second drive assembly 342 includes a sliding sleeve 3421 and a third magnetic ring 3422; the sliding sleeve 3421 is coaxially arranged with the drive shaft 31, and the sliding sleeve 3421 is movably connected to the drive shaft 31; the third magnetic ring 3422 is arranged on the sliding sleeve 3421.

[0054] The third magnetic ring 3422 is an energizable magnetic ring. When the second drive assembly 342 needs to drive the two docking sleeves 341 to fix the angle between the two drive plates 32, the magnetism of the third magnetic ring 3422 is adjusted to be opposite to that of the first magnetic ring 3321. At this time, the third magnetic ring 3422 moves towards the first magnetic ring 3321. The third magnetic ring 3422 drives the two docking sleeves 341 to move towards the intersection of the two drive plates 32 through the sliding sleeve 3421 and the transmission assembly 343. When the second drive assembly 342 needs to drive the two docking sleeves 341 to move away from each other along the two drive plates 32 respectively, the magnetism of the third magnetic ring 3422 is adjusted to be opposite to that of 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 drive plates 32 respectively through the sliding sleeve 3421 and the transmission assembly 343, so as to realize the linkage drive of the first drive assembly 332 and the second drive assembly 342 to make the fixed structure 34 work.

[0055] The above embodiments only represent one or several implementation manners of the present invention, and the description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended 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 capable 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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