Bicycle disc chuck and manufacturing device

Abstract

The bicycle disc chuck comprises a circular disc chuck body, spoke holes are evenly machined in the position, close to the edge, of the disc chuck body in the circumferential direction, and a flanging hole is formed in the center of the disc chuck body. The device comprises an upper die and a lower die which correspond up and down, a forming channel is formed in the middle of the lower die from left to right, elastic supporting mechanisms are correspondingly arranged on the front side and the rear side of the forming channel and used for suspending a material plate, and a matching module is correspondingly arranged at the bottom of the upper die and matched with the forming channel; after a process hole and a forming hole are sequentially punched in the forming channel of the material plate, the edge of the forming hole located in the center is bent twice to form a flanged hole, and then the flanged hole is sheared to form the disc chuck body. According to the faceplate body structure, the flanged hole is machined in the center, the contact area of the faceplate body and the center shaft is increased, and the overall structure is more stable after assembly.

Description

Technical Field

[0001] The utility model relates to a bicycle faceplate and a manufacturing device. Background Art

[0002] As an important part of bicycles, the bicycle hub is connected to the rim through spokes to form a complete wheel set. The bicycle hub generally includes a hollow central axis in terms of structure, with discs at the outer circumference of both ends of the central axis. The discs and the central axis are either integrally formed or split. After being processed separately, they are fixedly connected by welding, interference fit, etc. The discs are mostly sheet-like structures, and the contact area between the discs and the central axis is small. When the disc thickness is small, the connection strength between the two is insufficient, which will affect the stability of the overall connection structure and affect riding. Utility Model Content

[0003] In view of the shortcomings existing in the above problems, the utility model provides a bicycle faceplate and a manufacturing device.

[0004] To achieve the above object, the utility model provides a bicycle faceplate, comprising a circular faceplate body, wherein spoke holes are uniformly processed along the circumferential direction near the edge of the faceplate body, and a flanging hole is formed at the center of the faceplate body.

[0005] The utility model also provides a manufacturing device for a bicycle faceplate, comprising an upper mold and a lower mold corresponding to each other, wherein a molding channel is formed from left to right in the middle of the lower mold, and elastic support mechanisms are correspondingly arranged at the front and rear sides of the molding channel for suspending a material plate, and a matching module is correspondingly arranged at the bottom of the upper mold to match the molding channel;

[0006] An upper pressing plate is provided between the upper die and the lower die, the upper pressing plate is connected to the upper die via an elastic telescopic rod, and a hollow groove is processed on the upper pressing plate to correspond to the matching die set;

[0007] The forming channel is provided with a process hole groove, a forming hole groove, a first flanging hole groove, a second flanging hole groove, and a cutting groove from left to right in sequence, and the matching die set is provided with a first punching die, a second punching die, a first flanging die, a second flanging die, and a cutting die in sequence, the lower part of the first flanging die is a conical structure, a crimping surface is formed at the lower edge of the first flanging die along the circumferential direction, and the second flanging die is a columnar structure as a whole and has a chamfered lower part;

[0008] After the material plate is punched out with a process hole and a forming hole in sequence on the forming channel, the edge of the forming hole at the center is bent twice to form the flanging hole, and then sheared to form the faceplate body.

[0009] As a further improvement of the present invention, the distance between the material plate and the forming channel is greater than the length of the flanging hole.

[0010] As a further improvement of the utility model, the lower portion of the elastic telescopic rod passes through the upper pressing plate to form a guide rod, and a guide hole is processed on the lower die to match the guide rod.

[0011] As a further improvement of the utility model, the elastic support mechanism includes an elastic support block, which is vertically slidably installed in the inner hole of the lower mold, and a compression spring is provided at the bottom of the elastic support block. The elastic support block is processed with a step surface on one side of the molding channel, and the edge of the material sheet rests on the step surface.

[0012] As a further improvement of the utility model, the lower mold is installed on a base.

[0013] The beneficial effects of the utility model are:

[0014] The faceplate body structure increases the contact area between the faceplate body and the central axis by processing a flanging hole at the center. After assembly, the overall structure is more stable and not easy to come off. The manufacturing device adopts a progressive die stamping method. The flanging hole at the center of the faceplate body is formed by two bendings. The device structure is reasonably laid out and has high processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A front view of the device for making a bicycle faceplate;

[0016] Figure 2 A top view of the device for making a bicycle faceplate;

[0017] Figure 3 is a top view of the lower mold 2;

[0018] Figure 4 is a bottom view of the upper pressing plate 5;

[0019] Figure 5 It is a schematic diagram of the forming of the material sheet 4 in the forming channel 23;

[0020] Figure 6 Schematic diagram of the working cooperation between the first flanging die 73 and the first flanging hole groove 233;

[0021] Figure 7 It is a schematic diagram of the working cooperation between the second flanging die 74 and the second flanging hole groove 234;

[0022] Figure 8 It is a front view of the flower disc body 9;

[0023] Fig. 9 It is a central sectional view of the disc body 9.

[0024] In the figure: 1. base; 2. lower die; 21. guide hole; 22. inner hole; 23. forming channel; 231. process hole groove; 232. forming hole groove; 233. first flanging hole groove; 234. second flanging hole groove; 235. cutting groove; 3. elastic support mechanism; 31. elastic support block; 311. step surface; 32. compression spring; 4. material plate; 41. process hole; 42. forming hole; 5. upper pressure plate; 51. hollow groove; 6. elastic telescopic rod; 61. guide rod; 7. matching module; 71. first punching die; 72. second punching die; 73. first flanging die; 731. crimping surface; 74. second flanging die; 75. cutting die; 8. upper die; 9. disc body; 91. spoke hole; 92. flanging hole. DETAILED DESCRIPTION

[0025] A bicycle faceplate and a manufacturing device described in the embodiment of the utility model are as follows: Figure 8 , Fig. 9 As shown, the bicycle faceplate includes a circular faceplate body 9 , spoke holes 91 are evenly processed along the circumferential direction near the edge of the faceplate body 9 , and a flange hole 92 is formed at the center of the faceplate body 9 .

[0026] like Figure 1 The manufacturing device for the bicycle faceplate includes an upper mold 8 and a lower mold 2 corresponding to each other. The lower mold 2 is installed on the base 1. A molding channel 23 is formed from left to right in the middle of the lower mold 2. An elastic support mechanism 3 is provided on the front and rear sides of the molding channel 23 to suspend a material plate 4. The distance between the material plate 4 and the molding channel 23 is greater than the length of the flanging hole 92. A matching module 7 is provided at the bottom of the upper mold 8 to match the molding channel 23.

[0027] The elastic support mechanism 3 includes an elastic support block 31, which is vertically slidably installed in the inner hole 22 of the lower mold 2. A compression spring 32 is provided at the bottom of the elastic support block 31. A step surface 311 is processed on one side of the elastic support block 31 facing the molding channel 23, and the edge of the material plate 4 rests on the step surface 311.

[0028] An upper pressing plate 5 is provided between the upper die 8 and the lower die 2. The upper pressing plate 5 is connected to the upper die 8 through an elastic telescopic rod 6. A hollow groove 51 is processed on the upper pressing plate 5 to correspond to the matching die set 7. The lower part of the elastic telescopic rod 6 passes through the upper pressing plate 5 to form a guide rod 61. A guide hole 21 is processed on the lower die 2 to match the guide rod 61.

[0029] The forming channel 23 is provided with a process hole groove 231, a forming hole groove 232, a first flanging hole groove 233, a second flanging hole groove 234, and a cutting groove 235 from left to right, and the matching module 7 is provided with a first punching die 71, a second punching die 72, a first flanging die 73, a second flanging die 74, and a cutting die 75 in sequence. The lower part of the first flanging die 73 is a conical structure, and a crimping surface 731 is formed at the lower edge of the first flanging die 73 along the circumferential direction. The second flanging die 74 is a columnar structure as a whole and has a chamfered lower part.

[0030] After the material plate 4 is punched out with the process hole 41 and the forming hole 42 in the forming channel 23 in sequence, the edge of the forming hole 42 at the center is bent twice to form a flanging hole 92 , and then sheared to form the disc body 9 .

[0031] The faceplate body structure increases the contact area between the faceplate body and the central axis by processing a flanging hole at the center. After assembly, the overall structure is more stable and not easy to come off. The manufacturing device adopts a progressive die stamping method. The flanging hole at the center of the faceplate body is formed by two bendings. The device structure is reasonably laid out and has high processing efficiency.

[0032] In order to facilitate the understanding of the present invention, the following description is given in conjunction with the accompanying drawings during specific use;

[0033] During operation, the front and rear sides of the material plate are placed on the step surface of the elastic support block, which is suspended relative to the forming channel, and is intermittently fed from left to right along the direction of the forming channel. The length of each feeding corresponds to a stamping station; the upper mold moves downward, and the guide rod at the lower part of the elastic telescopic rod cooperates to extend into the guide hole of the lower mold. The bottom of the upper pressure plate first contacts the elastic support block and presses the elastic support block down until the material plate is placed on the forming channel. As the upper mold continues to move downward, the upper pressure plate presses the material plate tightly, and the matching module group at the bottom of the upper mold and the forming channel cooperate to stamp the material plate. The material plate first punches out process holes and forming holes in the forming channel in sequence (the forming holes here include spoke holes and through holes for forming flanging holes), and then the first flanging die cooperates with the first flanging hole groove to bend the edge of the forming hole located at the center downward by 45°, and then the second flanging die cooperates with the second flanging hole groove to punch the 45° bent forming hole to form a flanging hole, and completes the discharge of the disc body at the cutting groove, and the waste material is discharged along the right outlet of the forming channel.

[0034] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A bicycle faceplate manufacturing device, the bicycle faceplate comprising a circular faceplate body (9), the faceplate body (9) having spoke holes (91) uniformly processed along the circumferential direction near the edge, and a flange hole (92) formed at the center of the faceplate body (9), characterized in that: The manufacturing device comprises an upper mold (8) and a lower mold (2) corresponding to each other, a molding channel (23) is formed from left to right in the middle of the lower mold (2), and elastic support mechanisms (3) are correspondingly provided at the front and rear sides of the molding channel (23) for suspending a material plate (4), and a matching mold group (7) is correspondingly provided at the bottom of the upper mold (8) to match the molding channel (23); An upper pressing plate (5) is provided between the upper die (8) and the lower die (2), the upper pressing plate (5) being connected to the upper die (8) via an elastic telescopic rod (6), and a hollow groove (51) is processed on the upper pressing plate (5) to correspond to the matching die set (7); The molding channel (23) is provided with a process hole groove (231), a molding hole groove (232), a first flanging hole groove (233), a second flanging hole groove (234), and a cutting groove (235) from left to right in sequence; the matching die set (7) is provided with a first punching die (71), a second punching die (72), a first flanging die (73), a second flanging die (74), and a cutting die (75) in sequence; the lower portion of the first flanging die (73) is in a conical structure; a crimping surface (731) is formed at the lower edge of the first flanging die (73) along the circumferential direction; the second flanging die (74) is in a columnar structure as a whole and has a chamfered lower portion; After the material plate (4) is punched out with a process hole (41) and a forming hole (42) in sequence on the forming channel (23), the edge of the forming hole (42) located at the center is bent twice to form the flanging hole (92), and then sheared to form the disc body (9).

2. The manufacturing device according to claim 1, characterized in that: The distance between the material plate (4) and the forming channel (23) is greater than the length of the flanging hole (92).

3. The manufacturing device according to claim 1, characterized in that: The lower portion of the elastic telescopic rod (6) passes through the upper pressing plate (5) to form a guide rod (61), and a guide hole (21) is processed on the lower die (2) to match the guide rod (61).

4. The manufacturing device according to claim 1, characterized in that: The elastic support mechanism (3) comprises an elastic support block (31), the elastic support block (31) is vertically slidably installed in the inner hole (22) of the lower mold (2), a compression spring (32) is provided at the bottom of the elastic support block (31), and a step surface (311) is processed on one side of the elastic support block (31) facing the molding channel (23), and the edge of the material plate (4) rests on the step surface (311).

5. The manufacturing device according to claim 1, characterized in that: The lower mold (2) is installed on the base (1).

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