Bicycle hub flange spoke hole processing equipment and processing method

Abstract

The application relates to the technical field of bicycle hub machining, in particular to a bicycle hub flange plate spoke hole machining device and a machining method, which comprise a machining table, a punching clamping mechanism, a first positioning structure, a second positioning structure and a conveying structure. The punching clamping mechanism comprises four clamping structures and four clamp groups; the four clamping structures are sequentially arranged on the machining table, and the four clamp groups are respectively installed on the four clamping structures; the first positioning structure is used for circumferentially positioning the hub when switching the punched flange plate and the unpunched flange plate; the second positioning structure is used for circumferentially positioning the hub when switching the chamfered flange plate and the unchamfered flange plate; and the conveying structure is used for conveying the bicycle hub. The four clamping structures, the four clamp groups, the first positioning structure, the second positioning structure and the conveying structure are arranged, so that the continuous machining of the bicycle hub spoke hole is realized.

Description

Technical Field

[0001] This invention relates to the field of bicycle hub processing technology, specifically to equipment for processing spoke holes in bicycle hub flanges, and also to a method for processing spoke holes in bicycle hub flanges. Background Technology

[0002] As a core component of the bicycle drivetrain, the spoke hole machining accuracy on the flange of the bicycle hub directly affects the assembly stability of the spokes, the riding safety of the bicycle, and the transmission efficiency. With the rapid development of the bicycle industry, the market has placed increasingly higher demands on the production efficiency and machining accuracy of bicycle hubs. However, existing bicycle hub flange spoke hole machining equipment still has many technical pain points that urgently need to be solved in practical applications.

[0003] Currently, the machining of spoke holes on bicycle hub flanges mostly adopts a step-by-step processing mode. That is, one flange of the hub is punched first, and then the hub is flipped manually or by a simple mechanism to punch holes on the other flange. After punching, it is transferred to a separate chamfering machine to chamfer the spoke holes. This step-by-step processing method has the problems of a fragmented processing flow and cumbersome workstation switching, resulting in an excessively long processing cycle for a single hub, which makes it difficult to meet the efficiency requirements of mass production. Summary of the Invention

[0004] To address the aforementioned issues, a bicycle hub flange spoke hole processing equipment is provided. By incorporating four clamping structures, four clamping sets, a first positioning structure, a second positioning structure, and a conveying structure, continuous processing of bicycle hub spoke holes is achieved, shortening the processing cycle for a single hub.

[0005] To address the problems of existing technologies, this invention provides a bicycle hub flange spoke hole processing device, comprising a processing table, a stamping clamping mechanism, a first positioning structure, a second positioning structure, and a conveying structure; the processing table is horizontally positioned below a stamping device; the stamping clamping mechanism includes four clamping structures and four clamping fixture groups, the four clamping structures being arranged sequentially on the processing table, and the four clamping fixture groups being respectively mounted on the four clamping structures; the first and second clamping fixture groups are used to clamp bicycle hubs undergoing punching processing, and the third and fourth clamping fixture groups are used to clamp bicycle hubs undergoing chamfering processing; the first positioning structure is used to circumferentially position the hub when switching between a punched flange and an unpunched flange; the second positioning structure is used to circumferentially position the hub when switching between a chamfered flange and an unchamfered flange; the conveying structure is used to convey the bicycle hub along the processing table for gradual processing.

[0006] Preferably, the clamping structure includes a mounting plate and two clamping seats; the mounting plate is fixed on the processing table; the two clamping seats are mirror images of the middle surface of the mounting plate, and each of the two clamping seats has an inclined driving surface at one end opposite to the other, and the clamping seats are linked with the stamping equipment through the inclined driving surface.

[0007] Preferably, the clamping structure further includes two guide components and two reset components; the two guide components are arranged in parallel, and the guide components are used to fix the movement path of the clamping seat; the two reset components correspond to the two clamping seats respectively, and the reset components are used to drive the clamping seats to reset, keeping the two clamping seats in a state of separation from each other.

[0008] Preferably, the clamping assembly includes a first positioning seat and two clamping blocks; the first positioning seat is located at the center of the mounting plate of the clamping structure, and the first positioning seat has a first slot corresponding to the non-processed end of the hub; the two clamping blocks are respectively located on the two clamping seats, and the clamping blocks have multiple openings corresponding to the spoke holes to be stamped.

[0009] Preferably, the second fixture assembly further includes a plurality of first positioning pins, which correspond to the machined spoke holes of the hub flange.

[0010] Preferably, the third clamping assembly further includes multiple chamfered blocks, multiple second positioning pins, and a sinking component; the multiple chamfered blocks are respectively disposed in multiple openings of the two clamping blocks; the multiple second positioning pins correspond to the machined spoke holes of the hub flange; the sinking component is used to guide the first positioning seat to move downward.

[0011] Preferably, the structure of the fourth fixture group is the same as that of the third fixture group.

[0012] Preferably, the first positioning structure includes a second positioning seat and a plurality of third positioning pins; a second slot is provided in the middle of the second positioning seat; the plurality of third positioning pins are arranged around the second slot for corresponding to the spoke holes of the hub flange.

[0013] Preferably, the second positioning structure includes a third positioning seat and a plurality of fourth positioning pins; a third slot is provided in the middle of the third positioning seat; the plurality of fourth positioning pins are arranged around the third slot to correspond to the spoke holes that have been machined on the hub flange.

[0014] The method for machining spoke holes in bicycle hub flanges, applied to equipment for machining spoke holes in bicycle hub flanges, includes the following steps: S1. Place the bicycle hub vertically in the first fixture set, and the stamping equipment punches a hole in the first flange of the bicycle hub. S2. The conveyor structure rotates the bicycle hub 180 degrees vertically and transfers it to the second clamping set; S3. The stamping equipment punches holes in the second flange of the bicycle hub; S4. The conveyor structure transfers the bicycle hub to the third clamping group, and the stamping equipment stamps and chamfers the spoke holes on the second flange. S5. The conveyor structure rotates the bicycle hub 180 degrees vertically and transfers it to the fourth clamping group. S6. The stamping equipment punches and chamfers the spoke holes on the first flange.

[0015] The advantages of this invention application compared to the prior art are: 1. This invention application sets up four clamping structures, four fixture groups, a first positioning structure, a second positioning structure, and a conveying structure. The conveying structure synchronously completes the transfer and replenishment of multi-station hubs. The four clamping structures and four fixture groups cooperate with the stamping equipment to synchronously process the hubs in multiple fixture groups. The first positioning structure, the second positioning structure, and the fixture groups work together to achieve positioning during the hub flipping and transfer process. Through the coordinated cooperation of the conveying structure, the four clamping structures, the four fixture groups, the first positioning structure, and the second positioning structure, a closed-loop processing flow of "feeding - first wheel punching - flipping and positioning - second wheel punching - first wheel chamfering - flipping - second wheel chamfering" is constructed, so that the hub can flow orderly between each station and complete the entire process without interruption, thereby realizing the continuous processing of bicycle hub spoke holes and shortening the processing cycle of a single hub.

[0016] 2. This invention application provides an installation plate and two clamping seats. The ends of the clamping seats are provided with inclined driving surfaces. By directly linking the clamping action with the processing action of the stamping equipment, no additional signal linkage control is required. This avoids the action delay between the independent drive mechanism and the stamping equipment, thereby ensuring the precise synchronization of clamping positioning and processing action, and effectively improving processing accuracy and equipment operation stability.

[0017] 3. This invention application provides two guide components and two reset components. The guide components ensure that the clamping seats move synchronously and without tilting or offset during clamping and reset. The reset components store energy as the two clamping seats approach each other. After processing is completed, the reset components release the stored energy to drive the clamping seats to automatically return to their initial open state without manual intervention or additional control. Through the cooperation of the guide components and the reset components, the automatic reset of the two clamping seats is achieved. Attached Figure Description

[0018] Figure 1This is a perspective view of the bicycle hub flange spoke hole processing equipment for this invention application.

[0019] Figure 2 This is a perspective view of the clamping structure and fixture assembly in the bicycle hub flange spoke hole processing equipment of this invention.

[0020] Figure 3 This is a three-dimensional sectional view of the clamping structure and fixture assembly in the bicycle hub flange spoke hole processing equipment of this invention.

[0021] Figure 4 This is a perspective view of the clamping seat, guide assembly, and reset assembly in the bicycle hub flange spoke hole processing equipment of this invention.

[0022] Figure 5 This is a perspective view of the clamping seat, the first positioning seat, and the clamping block in the bicycle hub flange spoke hole processing equipment of this invention.

[0023] Figure 6 This is a perspective view of the clamping seat, first positioning seat, clamping block, and first positioning pin in the bicycle hub flange spoke hole processing equipment of this invention.

[0024] Figure 7 This is a perspective view of the first positioning seat, clamping block, chamfering block, second positioning pin, and sinking assembly in the bicycle hub flange spoke hole processing equipment of this invention.

[0025] Figure 8 This is a perspective view of the first positioning seat and the sinking component in the bicycle hub flange spoke hole processing equipment of this invention.

[0026] Figure 9 This is a perspective view of the clamping seat, first positioning seat, clamping block, chamfering block, second positioning pin, and sinking assembly in the bicycle hub flange spoke hole processing equipment of this invention.

[0027] Figure 10 This is a perspective view of the second positioning seat and the third positioning pin in the bicycle hub flange spoke hole processing equipment of this invention.

[0028] Figure 11 This is a perspective view of the third positioning seat and the fourth positioning pin in the bicycle hub flange spoke hole processing equipment of this invention.

[0029] Figure 12 This is a perspective view of the reciprocating conveyor frame, clamping and flipping transfer assembly, and clamping and transfer assembly in the bicycle hub flange spoke hole processing equipment of this invention application.

[0030] Figure 13 This is a perspective view of the clamping, flipping, and transferring component in the bicycle hub flange spoke hole processing equipment of this invention.

[0031] Figure 14 This is a perspective view of the clamping and transfer assembly in the bicycle hub flange spoke hole processing equipment of this invention.

[0032] The diagram is labeled as follows: 1. Machining table; 2. Stamping clamping mechanism; 21. Clamping structure; 211. Mounting plate; 212. Clamping seat; 2121. Inclined driving surface; 213. Guide assembly; 2131. First guide rod; 2132. Sliding sleeve; 214. Reset assembly; 2141. First spring; 2142. Connecting block; 22. Fixture assembly; 221. First positioning seat; 2211. First slot; 222. Clamping block; 23. First positioning pin; 24. Chamfered block; 25. Second positioning pin; 26. Sinking assembly; 2 61. Second guide rod; 262. Second spring; 3. First positioning structure; 31. Second positioning seat; 311. Second slot; 32. Third positioning pin; 4. Second positioning structure; 41. Third positioning seat; 411. Third slot; 42. Fourth positioning pin; 5. Conveying structure; 51. Reciprocating conveyor frame; 52. Clamping, flipping and transferring assembly; 521. Rotary cylinder; 522. First linear clamping cylinder; 523. First gripper; 53. Clamping and transferring assembly; 531. Second linear clamping cylinder; 532. Second gripper. Detailed Implementation

[0033] To further understand the features, technical means, and specific objectives and functions achieved by this invention application, the invention application will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0034] Reference Figures 1 to 14 The diagram shows a bicycle hub flange spoke hole processing device, comprising a processing table 1, a stamping and clamping mechanism 2, a first positioning structure 3, a second positioning structure 4, and a conveying structure 5. The processing table 1 is horizontally positioned below the stamping equipment. The stamping and clamping mechanism 2 includes four clamping structures 21 and four clamping fixture groups 22. The four clamping structures 21 are arranged sequentially on the processing table 1, and the four clamping fixture groups 22 are respectively installed on the four clamping structures 21. The first and second clamping fixture groups 22 are used to clamp bicycle hubs undergoing punching processing, and the third and fourth clamping fixture groups 22 are used to clamp bicycle hubs undergoing chamfering processing. The first positioning structure 3 is used to circumferentially position the hub when switching between a punched flange and an unpunched flange. The second positioning structure 4 is used to circumferentially position the hub when switching between a chamfered flange and an unchamfered flange. The conveying structure 5 is used to convey the bicycle hub along the processing table 1 for gradual processing.

[0035] First, the conveying structure 5 vertically moves the unprocessed bicycle hub to the first fixture group 22 of the processing table 1. The corresponding clamping structure 21 in the stamping clamping mechanism 2 starts the clamping operation, thereby clamping and positioning the bicycle hub. At this time, one flange of the bicycle hub is horizontally upward, and the stamping equipment moves downward to complete the first spoke hole stamping on the upward flange.

[0036] After the first round of stamping, the conveying structure 5 clamps the hub, lifts it upwards, and then rotates it 180 degrees so that the other unprocessed flange of the hub is horizontal. It is then placed on the first positioning structure 3 for initial positioning. After positioning, the conveying structure 5 transfers the hub to the second fixture group 22, while simultaneously transferring a new unprocessed hub to the first fixture group 22. The two clamping structures 21 corresponding to the stamping clamping mechanism 2 clamp the two hubs respectively. Immediately afterwards, the stamping equipment operates synchronously, punching holes in the first flange of the hub in the first fixture group 22 and in the second flange of the hub in the second fixture group 22. At this point, the hub in the second fixture group 22 has completed the double flange punching process.

[0037] After the double flange punching is completed, the conveying structure 5 transfers the hub that has completed two punching operations from the second clamping group 22 to the third clamping group 22, while simultaneously transferring the hub that has completed one punching operation from the first clamping group 22 to the second clamping group 22, and replenishing the first clamping group 22 with new unprocessed hubs. The punching equipment operates again, and the hub in the third clamping group 22 completes the chamfering on both sides of one of the flange spoke holes under the punching force.

[0038] After the first round of chamfering is completed, the conveying structure 5 clamps the hub and rotates it 180 degrees, transferring it to the fourth clamping group 22. Simultaneously, the hubs in the second clamping group 22 that have completed secondary stamping are transferred to the third clamping group 22, and the hubs in the first clamping group 22 that have completed primary stamping are transferred to the second clamping group 22. New hubs are also added to the first clamping group 22. The stamping equipment continues to operate, and the hubs in the fourth clamping group 22, under the stamping action, complete the double-sided chamfering of another flange spoke hole, achieving chamfering of the double flange spoke holes. Simultaneously, the hubs in the third clamping group 22 undergo the first round of chamfering, while the hubs in the second and first clamping groups 22 undergo punching simultaneously.

[0039] By repeating the above processing flow of "feeding - first wheel punching - flipping and positioning - second wheel punching - first wheel chamfering - flipping - second wheel chamfering", continuous processing of bicycle hub spoke holes can be achieved, shortening the processing cycle of a single hub.

[0040] Reference Figure 2 and Figure 3As shown: The clamping structure 21 includes the mounting plate 211 and two clamping seats 212; the mounting plate 211 is fixed on the processing table 1; the two clamping seats 212 are mirror images of the middle surface of the mounting plate 211, and each of the two clamping seats 212 has an inclined driving surface 2121 at one end opposite to the other, and the clamping seats 212 are linked with the stamping equipment through the inclined driving surface 2121.

[0041] After the conveying structure 5 moves the bicycle hub to be processed to the positioning area between the two clamping seats 212, the stamping equipment starts and moves downward in the vertical direction. The stamping equipment contacts the inclined driving surfaces 2121 of the two clamping seats 212 and generates a squeezing action. The inclined driving surfaces 2121 convert the vertical downward force of the stamping equipment into a lateral driving force. This lateral driving force pushes the two clamping seats 212 to move synchronously in the direction close to the middle surface of the mounting plate 211 until the inner clamping surfaces of the two clamping seats 212 are tightly fitted with the outer peripheral surface of the bicycle hub, completing the clamping and positioning of the bicycle hub. At this time, the stamping equipment can continue to move downward to complete the subsequent spoke hole stamping or chamfering processing. By directly linking the clamping action with the processing action of the stamping equipment, no additional signal linkage control is required, avoiding the action delay between the independent drive mechanism and the stamping equipment, thereby ensuring the precise synchronization of clamping positioning and processing actions, effectively improving processing accuracy and equipment operation stability.

[0042] Reference Figure 3 and Figure 4 As shown: The clamping structure 21 further includes two guide components 213 and two reset components 214; the two guide components 213 are arranged in parallel and are used to fix the movement path of the clamping seat 212; the two reset components 214 correspond to the two clamping seats 212 respectively and are used to drive the clamping seats 212 to reset, keeping the two clamping seats 212 in a state of separation from each other.

[0043] Specifically, the guide assembly 213 includes a first guide rod 2131 and two sliding sleeves 2132. The axis of the first guide rod 2131 is arranged in a direction perpendicular to the middle surface of the mounting plate 211. The two sliding sleeves 2132 are slidably disposed on the first guide rod 2131 and are respectively connected to the two clamping seats 212. The reset assembly 214 includes a first spring 2141 and two connecting blocks 2142. The two connecting blocks 2142 are respectively disposed at both ends of the first spring 2141 and are respectively connected to the mounting plate 211 and the clamping seats 212.

[0044] In its natural state, the elastic force of the first spring 2141 pushes the two clamping seats 212 to separate from each other, keeping them open and providing ample space for the hub to be inserted. When the stamping equipment pushes the clamping seats 212 to clamp through the inclined drive surface 2121, the two clamping seats 212 slide synchronously along the first guide rod 2131 toward the middle surface of the mounting plate 211. The first guide rod 2131 in the guide assembly 213 cooperates with the sliding sleeve 2132 to effectively prevent the clamping seats 212 from shifting or tilting during movement, ensuring that the movement trajectory of the two clamping seats 212 is accurate and synchronous. During this process, the clamping seats 212 compress the first spring 2141 of the reset assembly 214 through the connecting block 2142. The first spring 2141 gradually accumulates reset elastic force until the two clamping seats 212 are tightly attached to the outer circumference of the hub, completing the clamping and positioning.

[0045] After the corresponding workstation finishes processing, the stamping equipment resets upwards, and the squeezing action between it and the inclined driving surface 2121 of the clamping seat 212 disappears, releasing the lateral driving force. At this time, the compressed first spring 2141 releases its accumulated reset elastic force, pushing the two clamping seats 212 to slide along the first guide rod 2131 in a direction of separation through the connecting blocks 2142 at both ends. The guide assembly 213 ensures a smooth and unbiased reset movement until the first spring 2141 returns to its natural extended state, and the two clamping seats 212 return to their initial open position. At this time, sufficient space is formed between the clamping seats 212, allowing the conveying structure 5 to smoothly transfer the processed hub to the next workstation and send the new hub to be processed into the positioning area. Through the cooperation of the guide assembly 213 and the reset assembly 214, the automated reset of the two clamping seats 212 is achieved.

[0046] Reference Figure 3 and Figure 5 As shown: The clamping assembly 22 includes a first positioning seat 221 and two clamping blocks 222; the first positioning seat 221 is located at the center of the mounting plate 211 of the clamping structure 21, and the first positioning seat 221 has a first slot 2211 corresponding to the non-processed end of the hub; the two clamping blocks 222 are respectively located on the two clamping seats 212, and the clamping blocks 222 have a plurality of openings corresponding to the spoke holes to be stamped.

[0047] After the conveying structure 5 transfers the bicycle hub to be processed to the area of ​​the fixture group 22, it first aligns the non-processed end of the hub with the first slot 2211 of the first positioning seat 221 and inserts it. The matching structure between the first slot 2211 and the non-processed end of the hub achieves the initial positioning of the hub, ensuring that the flange to be processed is in the preset processing position with the horizontal orientation, and avoiding positional deviation during subsequent stamping. After the initial positioning is completed, the two clamping seats 212 of the clamping structure 21 move synchronously towards the middle surface of the mounting plate 211, driving the two clamping blocks 222 mounted on it to move synchronously until the two clamping blocks 222 abut against the flange to be processed from both sides of the hub and fit tightly against the lower surface of the flange, providing upward support force and completing the secondary limiting and fixing of the hub. After the fixture assembly 22 completes positioning and clamping, the stamping equipment starts and moves vertically downward. Its punch passes through the flange and punches spoke holes on the flange. At the same time, the punch continues to descend and enters the corresponding opening on the clamping block 222 to avoid collision and damage between the punch and the clamping block 222. Through the initial positioning of the first slot 2211 and the secondary limiting of the two clamping blocks 222, the flange to be processed is ensured to be in the standard processing position with the horizontal orientation, effectively limiting the vertical movement and horizontal deviation of the hub during the stamping process.

[0048] Reference Figure 6 As shown: The second fixture group 22 also includes a plurality of first positioning pins 23, which correspond to the machined spoke holes of the hub flange.

[0049] After the first fixture group 22 completes the spoke hole stamping of one flange of the hub, the conveying structure 5 clamps the hub, lifts it upward, and rotates it 180 degrees so that the other unprocessed flange is horizontally facing upward. Then, the hub is transferred to the area of ​​the second fixture group 22. The spoke holes on the processed flange of the hub are aligned with the first positioning pins 23 of the second fixture group 22. As the hub moves downward, multiple first positioning pins 23 are inserted into the spoke holes of the processed flange of the hub, completing the circumferential rotation restriction; at the same time, the non-processed end of the hub is embedded in the first slot 2211 of the first positioning seat 221. The first slot 2211 restricts the axial displacement of the hub through the adaptation structure with the end of the hub; subsequently, the clamping structure 21 drives the two clamping blocks 222 to move synchronously towards the middle surface of the mounting plate 211. The clamping blocks 222 are in close contact with the lower surface of the flange to be processed, restricting the radial displacement of the hub. Through the coordinated action of the first slot 2211, the first positioning pin 23, and the clamping block 222, the hub achieves triple positioning, ensuring that the spoke holes on the other flange and the machined spoke holes maintain a preset correspondence in the circumferential angle, thus avoiding the problem of circumferential misalignment of the spoke holes.

[0050] Reference Figure 7 and Figure 8As shown: The third clamping assembly 22 also includes a plurality of chamfered blocks 24, a plurality of second positioning pins 25 and a sinking assembly 26; the plurality of chamfered blocks 24 are respectively disposed in a plurality of openings of the two clamping blocks 222; the plurality of second positioning pins 25 correspond to the spoke holes of the hub flange that have been machined; the sinking assembly 26 is used to guide the first positioning seat 221 to move down.

[0051] Specifically, the sinking component 26 includes a plurality of second guide rods 261. One end of the second guide rod 261 is connected to the bottom of the first positioning seat 221, and the second guide rod 261 is slidably connected to the mounting plate 211. A second spring 262 is sleeved on the second guide rod 261, and the two ends of the second spring 262 abut against the bottom of the first positioning seat 221 and the mounting plate 211, respectively.

[0052] The conveying structure 5 transfers the hub, with both flanges punched, to the area of ​​the third clamping group 22. First, one end of the hub is inserted into the first slot 2211 of the first positioning seat 221 for initial axial positioning. Simultaneously, the machined spoke holes on the corresponding flange end are aligned and engaged with the second positioning pin 25 of the clamping group 22. The second positioning pin 25 restricts the circumferential rotation of the hub, completing circumferential positioning. Subsequently, the stamping equipment starts and moves vertically downwards. The clamping structure 21, driven by the stamping equipment, moves the two clamping blocks 222 synchronously towards the middle surface of the mounting plate 211. The clamping blocks 222 finally clamp the hub. At this point, the machined spoke holes on the flange above the hub are aligned with the punch of the stamping equipment and the chamfered block 24 in the opening of the clamping block 222, with the flange directly above the chamfered block 24, completing the overall positioning before processing. The stamping equipment continues to move downwards, contacting the flange surface above the hub and applying downward pressure. The flange transmits the downward force to the first positioning seat 221. Under pressure, the first positioning seat 221 overcomes the elastic force of the second spring 262, causing the second guide rod 261 to move vertically downward until the lower surface of the upper flange is in contact with the upper surface of the clamping block 222. At this time, the two ends of the machined spoke holes on the flange form a pressing fit with the corresponding structure of the stamping equipment and the chamfering block 24 in the opening of the clamping block 222. Under the continuous pressure of the stamping equipment, the two sides of the spoke holes are simultaneously trimmed by the chamfering block 24 and the structure of the stamping equipment, forming a smooth chamfer, thus achieving simultaneous chamfering on both sides of the spoke holes.

[0053] Reference Figure 9 As shown: the structure of the fourth fixture group 22 is the same as that of the third fixture group 22.

[0054] The conveyor structure 5 clamps a hub whose flange has been chamfered after passing through the third clamping group 22. It first rotates the hub 180 degrees so that the un-chamfered flange is horizontal, then moves it to the area of ​​the fourth clamping group 22. Subsequently, the same chamfering process is repeated for the previous flange, ensuring complete uniformity in the chamfering process for both flanges. This avoids process deviations caused by differences in equipment structure, guarantees precise consistency in chamfer dimensions and angles, and ensures that the chamfering of both flanges in each batch of hubs follows a unified standard. This reduces individual processing differences and provides a reliable guarantee for the subsequent assembly of the hub and spokes.

[0055] Reference Figure 1 and Figure 10 As shown: The first positioning structure 3 includes a second positioning seat 31 and a plurality of third positioning pins 32; a second slot 311 is provided in the middle of the second positioning seat 31; the plurality of third positioning pins 32 are arranged around the second slot 311 and are used to correspond to the spoke holes that have been machined on the hub flange.

[0056] After the first clamping group 22 completes the initial punching of one flange of the hub, the conveying structure 5 starts and clamps the hub upward, removing it from the clamping range of the first clamping group 22. Subsequently, the conveying structure 5 rotates the hub 180 degrees, so that the unprocessed flange faces upward and the punched flange faces downward. After the rotation, the conveying structure 5 moves the hub towards the first positioning structure 3, aligning it with the second slot 311 of the second positioning seat 31, embedding the end of the hub into the second slot 311 to achieve initial axial positioning of the hub. Simultaneously, it ensures that the spoke holes on the punched flange below correspond one-to-one with the multiple third positioning pins 32 arranged around the second slot 311. The third positioning pins 32 are inserted into the processed spoke holes, restricting the circumferential rotation of the hub during the positioning process, completing the positioning after the rotation. The conveying structure 5 clamps the hub again and lifts it vertically upward, causing the end of the hub to disengage from the second slot 311 of the second positioning seat 31, and the third positioning pins 32 to separate from the spoke holes. Subsequently, the conveying structure 5 transfers the positioned hub to the second fixture group 22. Through the axial positioning of the second slot 311 and the circumferential positioning of the third positioning pin 32, the posture deviation that may occur during the rotation and transfer of the hub can be effectively corrected, ensuring that when it is transferred to the second fixture group 22, the unprocessed flange is always in the standard machining position with the horizontal facing upward.

[0057] Reference Figure 1 and Figure 11 As shown: The second positioning structure 4 includes a third positioning seat 41 and a plurality of fourth positioning pins 42; a third slot 411 is provided in the middle of the third positioning seat 41; the plurality of fourth positioning pins 42 are arranged around the third slot 411 to correspond to the spoke holes of the hub flange.

[0058] After the third clamping group 22 completes the initial chamfering of one flange of the hub, the conveying structure 5 starts and clamps the hub upward, lifting it out of the clamping range of the third clamping group 22. Subsequently, the conveying structure 5 drives the hub to complete a 180-degree rotation, so that the other flange that has not been chamfered is horizontally facing upward, while the flange that has been chamfered is facing downward. After the rotation is completed, the conveying structure 5 drives the hub to move towards the second positioning structure 4, aligning it with the third slot 411 of the third positioning seat 41, and slowly inserts the end of the hub into the third slot 411 to achieve the initial axial positioning of the hub; at the same time, it ensures that the spoke holes on the lower pre-machined flange correspond one-to-one with the multiple fourth positioning pins 42 set around the third slot 411. As the end of the hub is inserted, the fourth positioning pins 42 are simultaneously inserted into the pre-machined spoke holes, restricting the circumferential rotation of the hub during the positioning process, completing the positioning after the rotation. The conveying structure 5 clamps the hub again and lifts it vertically upwards, causing the end of the hub to disengage from the third slot 411 of the third positioning seat 41, the fourth positioning pin 42, and the spoke hole. Subsequently, the conveying structure 5 transfers the positioned hub to the fourth fixture group 22, at which point the unprocessed flange of the hub remains horizontally upwards. The second positioning structure 4, acting as a transitional positioning component between the third and fourth fixture groups 22, provides rapid positioning to prevent positioning deviations and rework adjustments after the hub is transferred to the fourth fixture group 22, ensuring smooth connection between the two chamfering stations and adapting to the overall continuous processing rhythm.

[0059] Reference Figure 1 , Figure 12 , Figure 13 and Figure 14 As shown: The conveying structure 5 includes two reciprocating conveyor frames 51, two clamping and flipping transfer components 52, and four clamping and transfer components 53; the two reciprocating conveyor frames 51 are arranged in parallel on both sides of the processing table 1; the two clamping and flipping transfer components 52 are used to flip the hub 180 degrees and transfer the hub along the processing direction; the four clamping and transfer components 53 are used to transfer the hub along the processing direction.

[0060] Specifically, the clamping and flipping transfer assembly 52 includes two rotary cylinders 521, which are respectively mounted on two reciprocating conveyor frames 51. The output end of the rotary cylinder 521 is provided with a first linear clamping cylinder 522, and the output end of the first linear clamping cylinder 522 is provided with a first gripper 523. The clamping and transfer assembly 53 includes two second linear clamping cylinders 531, which are respectively mounted on two reciprocating conveyor frames 51. The output end of the second linear clamping cylinder 531 is provided with a second gripper 532.

[0061] In the specific process, the clamping and flipping transfer component 52 is responsible for the flipping and transfer of the hub between the first positioning structure 3 and the second clamping group 22, and between the third clamping group 22 and the second positioning structure 4. The clamping and transfer component 53 is responsible for the direct transfer of the hub between the first positioning structure 3 and the second clamping group 22, between the second clamping group 22 and the third clamping group 22, and between the second positioning structure 4 and the fourth clamping group 22. The transfer and flipping of the hub can be completed without manual intervention, which greatly shortens the station switching time, adapts to the overall continuous processing rhythm, and significantly improves the efficiency of batch production.

[0062] The method for machining spoke holes in bicycle hub flanges, applied to equipment for machining spoke holes in bicycle hub flanges, includes the following steps: S1. Place the bicycle hub vertically in the first fixture group 22, and the stamping equipment punches a hole in the first flange of the bicycle hub. S2, the conveying structure 5 rotates the bicycle hub 180 degrees vertically and transfers it to the second clamping group 22; S3. The stamping equipment punches holes in the second flange of the bicycle hub; S4, conveyor structure 5 transfers bicycle hub to third clamp group 22, and stamping equipment stamps and chamfers the spoke holes on the second flange; S5, the conveying structure 5 rotates the bicycle hub 180 degrees vertically and transfers it to the fourth clamp group 22; S6. The stamping equipment punches and chamfers the spoke holes on the first flange.

[0063] The above embodiments only illustrate one or more implementation methods of this invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this invention, and these all fall within the protection scope of this invention. Therefore, the protection scope of this invention should be determined by the appended claims.

Claims

1. A bicycle hub flange spoke hole processing equipment, characterized in that, It includes a processing table, a stamping clamping mechanism, a first positioning structure, a second positioning structure, and a conveying structure; The processing table is horizontally positioned below the stamping equipment; The stamping clamping mechanism includes four clamping structures and four clamping fixture groups. The four clamping structures are arranged sequentially on the processing table, and the four clamping fixture groups are respectively installed on the four clamping structures. The first and second clamping fixture groups are used to clamp bicycle hubs undergoing punching processing, and the third and fourth clamping fixture groups are used to clamp bicycle hubs undergoing chamfering processing. The first positioning structure is used to circumferentially position the hub when switching between a perforated flange and an unperforated flange. The second positioning structure is used to circumferentially position the hub when switching between chamfered and unchamfered flanges; The conveying structure is used to transport bicycle hubs along the processing table for gradual processing.

2. The bicycle hub flange spoke hole processing equipment according to claim 1, characterized in that, The clamping structure includes a mounting plate and two clamping seats; The mounting plate is fixed to the processing table; The two clamping seats are mirror images of the middle surface of the mounting plate, and each of the two clamping seats has an inclined driving surface at one end facing away from the other. The clamping seats are linked with the stamping equipment through the inclined driving surface.

3. The bicycle hub flange spoke hole processing equipment according to claim 2, characterized in that, The clamping structure also includes two guide components and two reset components; The two guide components are arranged in parallel, and the guide components are used to fix the movement path of the clamping seat; The two reset components correspond to the two clamping seats respectively. The reset components are used to drive the clamping seats to reset, keeping the two clamping seats in a state of separation from each other.

4. The bicycle hub flange spoke hole processing equipment according to claim 3, characterized in that, The clamp assembly includes a first positioning seat and two clamping blocks; The first positioning seat is located at the center of the mounting plate of the clamping structure, and the first positioning seat has a first slot corresponding to the non-processed end of the hub; The two clamping blocks are respectively disposed on the two clamping seats, and the clamping blocks are provided with a plurality of openings corresponding to the holes of the spokes to be stamped.

5. The bicycle hub flange spoke hole processing equipment according to claim 4, characterized in that, The second fixture assembly also includes a plurality of first positioning pins, which correspond to the machined spoke holes on the hub flange.

6. The bicycle hub flange spoke hole processing equipment according to claim 4, characterized in that, The third fixture assembly also includes multiple chamfered blocks, multiple second positioning pins, and a recessed assembly; The chamfered blocks are respectively disposed in the multiple openings of the two clamping blocks; Multiple second positioning pins correspond to the machined spoke holes on the hub flange; The sinking component is used to guide the first positioning seat to move downwards.

7. The bicycle hub flange spoke hole processing equipment according to claim 4, characterized in that, The structure of the fourth fixture group is the same as that of the third fixture group.

8. The bicycle hub flange spoke hole processing equipment according to claim 1, characterized in that, The first positioning structure includes a second positioning base and multiple third positioning pins; The second positioning seat has a second slot in the middle; Multiple third positioning pins are arranged around the second slot for corresponding to the machined spoke holes on the hub flange.

9. The bicycle hub flange spoke hole processing equipment according to claim 1, characterized in that, The second positioning structure includes a third positioning base and multiple fourth positioning pins; The third positioning seat has a third slot in the middle; Multiple fourth positioning pins are arranged around the third slot for corresponding to the machined spoke holes on the hub flange.

10. A method for machining spoke holes in a bicycle hub flange, applied to the bicycle hub flange spoke hole machining equipment as described in any one of claims 1-9, characterized in that, Includes the following steps: S1. Place the bicycle hub vertically in the first fixture set, and the stamping equipment punches a hole in the first flange of the bicycle hub. S2. The conveyor structure rotates the bicycle hub 180 degrees vertically and transfers it to the second clamping set; S3. The stamping equipment punches holes in the second flange of the bicycle hub; S4. The conveyor structure transfers the bicycle hub to the third clamping group, and the stamping equipment stamps and chamfers the spoke holes on the second flange. S5. The conveyor structure rotates the bicycle hub 180 degrees vertically and transfers it to the fourth clamping group. S6. The stamping equipment punches and chamfers the spoke holes on the first flange.

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