One-piece die-cast bicycle hub

Abstract

The application relates to the technical field of hubs, in particular to an integrated die-casting bicycle hub which comprises side plates and a connecting ring, the connecting ring is connected to one end of the side plates, an installation cavity is formed between the side plates and the connecting ring, a supporting assembly is arranged on the inner wall of the side plates, the supporting assembly is located in the installation cavity, the side plates, the connecting ring and the supporting assembly are integrally formed, and the damage of the welding seam of the wheel rim to the tire can be reduced.

Description

Technical Field

[0001] This application relates to the technical field of wheel hubs, and in particular to one-piece die-cast bicycle wheel hubs. Background Technology

[0002] A wheel hub includes a hub, spokes, a rim, and a tire. One end of the spokes is connected to the hub, and the other end is connected to the rim. The tire is fitted onto the outer wall of the rim. The rim is the core load-bearing structure of the wheel. The rim is a circular structure. The tire includes an inner tube and an outer tire. The outer wall of the rim has grooves. The inner tube is installed on the outer wall of the rim and is located in the grooves. The outer tire surrounds the inner tube, and the tire bead of the outer tire is engaged with the tire bead of the rim.

[0003] Currently, bicycle rims are manufactured by extruding a long strip structure, then bending the strip structure into a ring shape, and finally welding the two ends together. The weld seam at the joint is uneven. Because bicycle rims are prone to deformation after prolonged use, the bicycle tires are easily punctured by the weld seam at the joint, thus affecting the lifespan of the bicycle tires and riding safety. Summary of the Invention

[0004] To reduce the damage to the tire caused by the weld seams of the wheel rim, this application provides a one-piece die-cast bicycle wheel hub.

[0005] The one-piece die-cast bicycle wheel hub provided in this application adopts the following technical solution:

[0006] The one-piece die-cast bicycle hub includes a side plate and a connecting ring. The connecting ring is connected to one end of the side plate, and an installation cavity is formed between the side plate and the connecting ring. A support component is provided on the inner wall of the side plate and is located in the installation cavity. The side plate, the connecting ring and the support component are integrally formed.

[0007] By adopting the above technical solution, the two side plates, connecting ring and support components are integrally formed. Compared with the existing technology, which forms a structure by extrusion and bending and then welding the two ends of the structure, this application integrally forms a structure, which can reduce the generation of weld seams and thus reduce the possibility of the tire being punctured at the wheel rim weld seam. In addition, the integral forming method can improve the structural stability of the wheel rim. At the same time, it can also make it convenient to set the shape of the connecting ring according to specific conditions.

[0008] Preferably, the sidewall of the side plate has a groove, which is located at the top of the side plate and is arranged around the circumference of the side plate.

[0009] By adopting the above technical solution, the support plate is fitted and snapped onto the top surface of the support assembly, the inner tube is sleeved on the outer wall of the support plate, and the support plate provides a smoother installation structure for the inner tube. The two side plates are respectively provided with grooves on the inner side, the grooves are located on the top of the side plates, and the grooves are arranged around the side plates. The outer tire is sleeved on the outside of the inner tube, and the tire bead of the outer tire is inserted into the groove, thereby locking the outer tire to the side plate.

[0010] Preferably, the connecting ring is a wavy ring, which includes an outwardly protruding part and an inwardly recessed part. A mounting hole is provided through the top surface of the connecting ring, and the mounting hole is located at the bottom of the protruding part.

[0011] By adopting the above technical solution, one end of the spoke is connected to the hub, and the other end of the spoke extends into the connecting ring through the mounting hole. Then, the spoke cap is threaded onto the part of the spoke that extends into the connecting ring. Compared with the case where the spoke is connected to the recessed part, in this application, the spoke is connected to the protrusion, which can reduce the length of the spoke, thereby saving materials. In addition, the shorter length of the spoke reduces the bending of the middle of the spoke when the two ends of the spoke are under force. The connecting ring of the prior art is an annular ring, and the tension of the spoke is evenly distributed. When a single point impacts, the stress is concentrated at the impact point, which is more likely to cause deformation. In this application, the tension of the spoke is concentrated at the top of the protrusion, and the spoke concentrated anchoring area forms a rigid support point. The recessed part is a flexible deformation area that can absorb impact energy. The impact force is dispersed by the adjacent recesses, thereby reducing deformation.

[0012] Preferably, a mounting base is fixed inside the connecting ring. The mounting base is located at the bottom of the protrusion. The top surface of the mounting base is a neat flat surface, and the mounting hole extends through to the top surface of the mounting base.

[0013] By adopting the above technical solution, one end of the spoke extends through the mounting hole and out of the top surface of the mounting seat. Then, the spoke cap is threaded onto the part of the spoke that extends out of the top surface of the mounting seat. The bottom surface of the spoke cap abuts against the top surface of the mounting seat. The top surface of the mounting seat is a neat flat surface, which allows the bottom surface of the spoke cap to abut against the top surface of the mounting seat better, thereby improving the connection stability between the spoke and the mounting seat.

[0014] Preferably, the bottom surface area of ​​the mounting base is larger than the top surface area of ​​the mounting base.

[0015] By adopting the above technical solution, the bottom area of ​​the mounting base is larger than the top area of ​​the mounting base, thereby increasing the connection area between the mounting base and the connecting ring, and thus improving the connection stability between the mounting base and the connecting ring.

[0016] Preferably, the support assembly includes a main support plate, the bottom surface of which is fixed to the top of the recess, and the long side of the support plate is perpendicular to the tangential surface of the top of the recess.

[0017] By adopting the above technical solution, under the action of the main support plate, the pressure on the tire is transmitted to the top of the recess through the main support plate. The load on the top of the recess is then distributed to the two bottom ends of the recess. The top of the recess and the two bottom ends of the recess form a triangular structure. Triangles have stability, which makes the connecting ring structure more stable and reduces the situation where the connecting ring is easily deformed under stress.

[0018] Preferably, the support assembly further includes a secondary support plate group, which includes a secondary support plate. The secondary support plate is inclined and its long side is not perpendicular to the top cut surface of the recess.

[0019] By adopting the above technical solution, the secondary support plate is inclined. After the inner tube and outer tire are installed, the inner tube needs to be inflated. When the inner tube is inflated, it exerts pressure on the main support plate and the secondary support plate. Then, the main support plate and the secondary support plate transmit the pressure to the rim. The secondary support plate is inclined, and the pressure acts obliquely on the recessed part. Compared with the case where the long side of the secondary support plate is perpendicular to the tangential surface of the top of the recessed part, this application converts the radial pressure into an axial component force, reducing the radial force acting on the connecting ring, thereby reducing the possibility of rim deformation due to excessive pressure during inflation. Correspondingly, when the secondary support plate is subjected to other pressures, it can also convert the pressure into an axial component force, reducing the possibility of rim deformation.

[0020] Preferably, the area of ​​the bottom surface of the secondary support plate is larger than the area of ​​the top surface of the secondary support plate.

[0021] By adopting the above technical solution, the area of ​​the bottom surface of the sub-support plate is larger than the area of ​​the top surface of the sub-support plate, thereby increasing the connection area between the sub-support plate and the connecting ring, thus improving the connection stability between the sub-support plate and the connecting ring, and reducing the possibility of damage caused by excessive pressure on the connection between the sub-support plate and the connecting ring.

[0022] Preferably, there are multiple sets of secondary support plates, which are arranged around the circumference of the connecting ring, with adjacent sets of secondary support plates tilting in opposite directions.

[0023] By adopting the above technical solution, the secondary support plates in the two adjacent secondary support plate groups are tilted in opposite directions, so that the axial component forces generated by the two adjacent secondary support plate groups can interact with each other, balancing the axial component forces on the wheel rim. This further reduces the deformation of the wheel rim after the pressure is applied to it.

[0024] Preferably, there are multiple main support plates, which are arranged around the circumference of the connecting ring, and the secondary support plate group is located between two adjacent main support plates.

[0025] By adopting the above technical solution, multiple main support plates are arranged around the connecting ring, and the secondary support plate group is located between two adjacent main support plates. The two adjacent secondary support plate groups are symmetrically arranged along the main support plate between the two secondary support plate groups, thereby making the overall structure of the support component more coordinated, making the force on the connecting ring more balanced, and reducing the deformation of the connecting ring.

[0026] In summary, this application includes at least one of the following beneficial technical effects:

[0027] 1. The two side plates, connecting ring, and support components are integrally formed. Compared with the existing technology, which forms a structure through extrusion and bending and then welds the ends of the structure, this application is integrally formed, which can reduce the generation of weld seams and thus reduce the possibility of tire puncture at the wheel rim weld seams. In addition, the integral forming method can improve the structural stability of the wheel rim. At the same time, it can also make it convenient to set the shape of the connecting ring according to specific conditions.

[0028] 2. One end of the spoke is connected to the hub, and the other end of the spoke passes through the mounting hole and extends into the connecting ring. Then, the spoke cap is threaded onto the part of the spoke that extends into the connecting ring. Compared with the case where the spoke is connected to the recessed part, in this application, the spoke is connected to the protruding part, which can reduce the length of the spoke, thereby saving materials. In addition, the shorter length of the spoke reduces the possibility of bending in the middle of the spoke when the two ends of the spoke are under stress. The connecting ring of the prior art is an annular ring, and the tension of the spoke is evenly distributed. When a single point impacts, the stress is concentrated at the impact point, which is more likely to cause deformation. In this application, the tension of the spoke is concentrated at the top of the protruding part, and the spoke concentrated anchoring area forms a rigid support point. The recessed part is a flexible deformation area that can absorb impact energy. The impact force is dispersed by the adjacent recessed parts, thereby reducing deformation. Attached Figure Description

[0029] Figure 1 This is a side view of an embodiment of this application.

[0030] Figure 2 This is a top view of an embodiment of this application.

[0031] Figure 3 This is a partial sectional view of this application.

[0032] Figure 4 yes Figure 2 A magnified view of A in the middle.

[0033] Figure 5 This is a cross-sectional view of this application.

[0034] Figure 6 This is an enlarged view of B in the diagram.

[0035] Explanation of reference numerals in the attached drawings: 1. Side plate; 11. Mounting cavity; 12. Groove; 2. Connecting ring; 21. Protrusion; 22. Recess; 3. Support assembly; 31. Main support plate; 311. Connecting part; 312. Support part; 32. Secondary support plate assembly; 321. Secondary support plate; 4. Mounting base; 41. Mounting hole. Detailed Implementation

[0036] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0037] This application discloses an integrated die-cast bicycle wheel hub.

[0038] Reference Figure 1 and Figure 2 An integrated die-cast bicycle wheel hub includes a rim, which comprises a side plate 1 and a connecting ring 2. The side plate 1 is an annular plate, and there are two side plates 1 arranged parallel to each other. The connecting ring 2 is located between the two side plates 1 and at one end of the side plate 1. An installation cavity 11 is formed between the two side plates 1 and the connecting ring 2. A support component 3 is provided between the two side plates 1, with the top surface of the side plate 1 higher than the top surface of the support component 3. The support component 3 is located within the installation cavity 11. The two side plates 1, the connecting ring 2, and the support component 3 are integrally formed. Compared with the prior art, which forms a structure through extrusion and bending and then welds the ends of the structure, this application uses an integral molding method, which can reduce the generation of weld seams and thus reduce the possibility of tire punctures at the weld seams of the rim. Furthermore, the integral molding method can improve the structural stability of the rim.

[0039] Reference Figure 3 A support plate (not shown in the attached figure) is provided between the two side plates 1. The support plate is fitted and snapped onto the top surface of the support assembly 3. The inner tube is sleeved on the outer wall of the support plate. The support plate provides a smoother installation structure for the inner tube. The inner side of each of the two side plates 1 has a groove 12. The groove 12 is located on the top of the side plate 1 and is arranged around the side plate 1. The outer tire is sleeved on the outside of the inner tube. The tire bead of the outer tire is inserted into the groove 12, thereby locking the outer tire to the side plate 1.

[0040] Reference Figure 2 and Figure 4The wheel rim is manufactured as a single piece, allowing the shape of the connecting ring 2 to be customized according to specific circumstances. In this embodiment, the connecting ring 2 is a wavy ring, comprising an outwardly protruding portion 21 and an inwardly recessed portion 22. A mounting seat 4 is fixed inside the connecting ring 2, and the mounting seat 4 is integrally formed with the connecting ring 2. The mounting seat 4 is located at the bottom of the protruding portion 21. There are multiple mounting seats 4, and the number of mounting seats 4 is adapted to the number of protruding portions 21. Multiple mounting seats 4 are distributed in the protruding portions 21 that are close to them. The mounting seat 4 is a truncated ellipse, and the bottom surface area of ​​the mounting seat 4 is larger than the top surface area of ​​the mounting seat 4, thereby increasing the connection area between the mounting seat 4 and the connecting ring 2, and thus improving the connection stability between the mounting seat 4 and the connecting ring 2.

[0041] Mounting seat 4 has a through mounting hole 41 on its top surface. The mounting hole 41 extends through the bottom surface of the connecting ring 2. One end of the spoke is connected to the hub, and the other end of the spoke extends out of the top surface of mounting seat 4 through the mounting hole 41. Then, the spoke cap is threaded onto the part of the spoke that extends out of the top surface of mounting seat 4. The bottom surface of the spoke cap abuts against the top surface of mounting seat 4. Mounting seat 4 is a truncated ellipse, so the top surface of mounting seat 4 is a neat plane, which allows the bottom surface of the spoke cap to abut against the top surface of mounting seat 4 better, improving the connection stability between the spoke and mounting seat 4.

[0042] Compared to the case where the spokes are connected to the recessed portion 22, in this application, the spokes are connected to the protrusion 21, which reduces the length of the spokes, thereby saving materials. Furthermore, the shorter length of the spokes reduces the likelihood of bending in the middle of the spokes when the ends are under stress. In the prior art, the connecting ring 2 is an annular ring, and the tension of the spokes is evenly distributed. When a single point impacts, the stress is concentrated at the impact point, making it easier to deform. In this application, the tension of the spokes is concentrated at the top of the protrusion 21, and the spoke concentrated anchoring area forms a rigid support point. The recessed portion 22 is a flexible deformation area that can absorb impact energy. The impact force is dispersed by adjacent recessed portions 22, thereby reducing deformation.

[0043] Reference Figure 5 and Figure 6 The support assembly 3 includes a main support plate 31, which includes a connecting part 311 and a support part 312. The bottom surface of the main support plate 31 is fixed to the top of the recess 22. The long side of the support part 312 is perpendicular to the top cut surface of the recess 22, and the wide side of the support part 312 is parallel to the wide side of the connecting ring 2. There are two connecting parts 311, which are located at both ends of the support part 312. One side of each connecting part 311 is connected to the adjacent side plate 1, thereby fixing the main support plate 31 between the two side plates 1. The bottom surface of the main support plate 31 is fixed to the top surface of the connecting ring 2.

[0044] The width of the connecting portion 311 gradually increases from the support portion 312 to the side plate 1. The area of ​​the connecting portion 311 near the side plate 1 is larger than the area of ​​the connecting portion 311 near the support portion 312, thereby increasing the connection area with the side plate 1 and improving the connection stability between the connecting portion 311 and the side plate 1. Correspondingly, the thickness of the main support plate 31 gradually increases from top to bottom. The bottom area of ​​the main support plate 31 is larger than the top area of ​​the main support plate 31, thereby increasing the connection area with the connecting ring 2 and improving the connection stability between the main support plate 31 and the connecting ring 2. At the same time, the larger connection area between the main support plate 31 and the connecting ring 2 allows the load on the main support plate 31 to be more evenly distributed at the top of the recess 22. The load at the top of the recess 22 is then distributed to the two bottom ends of the recess 22. The top and two bottom ends of the recess 22 form a triangular structure. Triangles have stability, thereby making the structure of the connecting ring 2 more stable and reducing the likelihood of deformation of the connecting ring 2 under stress.

[0045] Reference Figure 5 and Figure 6 There are multiple main support plates 31, which are arranged around the connecting ring 2. The support assembly 3 also includes a secondary support plate group 32. The number of secondary support plate groups 32 is adapted to the number of main support plates 31. Multiple secondary support plate groups 32 are arranged around the connecting ring 2. The secondary support plate groups 32 are arranged between two adjacent main support plates 31. The secondary support plate group 32 includes secondary support plates 321. The number of secondary support plates 321 depends on the specific situation. In this embodiment, there are two secondary support plates 321 in the secondary support plate group 32. The two secondary support plates 321 are respectively fixed to the top of two adjacent recesses 22. The two long sides of the secondary support plates 321 are respectively fixed to the inner wall of the side plate 1 that is close to them.

[0046] The secondary support plate 321 is inclined, with its wide side parallel to the wide side of the connecting ring 2, and its long side not perpendicular to the top cut surface of the recess 22. The two secondary support plates 321 within the same secondary support plate group 32 have the same inclination direction and angle, and are parallel. After the inner tube and outer tire are installed, the inner tube needs to be inflated. When the inner tube is inflated, it exerts pressure on the main support plate 31 and the secondary support plate 321. Then, the main support plate 31 and the secondary support plate 321 transmit the pressure to the rim. The secondary support plate 321 is inclined, and the pressure acts obliquely on the recess 22. Compared to the case where the long side of the secondary support plate 321 is perpendicular to the top cut surface of the recess 22, this application converts the radial pressure into an axial component force, reducing the radial force acting on the connecting ring 2, thereby reducing the possibility of rim deformation due to excessive pressure during inflation. Correspondingly, when the secondary support plate 321 is subjected to other pressures, it can also convert the pressure into an axial component force, reducing rim deformation.

[0047] The secondary support plates 321 in the two adjacent secondary support plate groups 32 are inclined in opposite directions. The two adjacent secondary support plate groups 32 are symmetrically arranged along the main support plate 31 between the two secondary support plate groups 32, so that the axial component forces generated by the two adjacent secondary support plate groups 32 can interact with each other and balance the axial component forces on the wheel rim. This can further reduce the deformation of the wheel rim after the pressure is applied to it.

[0048] From top to bottom, the width of the secondary support plate 321 gradually increases, and the area of ​​the bottom surface of the secondary support plate 321 is larger than the area of ​​the top surface of the secondary support plate 321, thereby increasing the connection area with the connecting ring 2, thereby improving the connection stability between the secondary support plate 321 and the connecting ring 2, and reducing the possibility of damage caused by excessive pressure on the connection between the secondary support plate 321 and the connecting ring 2.

[0049] The above are all preferred embodiments of this application. These embodiments are merely explanations of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. An integrated die-cast bicycle hub, characterized in that, The side plate (1) and the connecting ring (2) are connected. The connecting ring (2) is connected to one end of the side plate (1), and the mounting cavity (11) is formed between the side plate (1) and the connecting ring (2). The support assembly (3) is arranged on the inner wall of the side plate (1) and located in the mounting cavity (11). The side plate (1), the connecting ring (2) and the support assembly (3) are integrally formed. The connecting ring (2) is a wave-shaped ring, which comprises a protruding part (21) protruding outward and a recessed part (22) recessed inward. The mounting hole (41) is arranged on the top surface of the connecting ring (2) and located at the bottom end of the protruding part (21). The support assembly (3) comprises a main support plate (31), and the bottom surface of the main support plate (31) is fixed to the top end of the recessed part (22). The long side of the support part (312) is perpendicular to the top end of the recessed part (22). The support assembly (3) further comprises a plurality of groups of vice support plates (32), and each group of vice support plates (32) comprises a vice support plate (321). The vice support plate (321) is arranged obliquely, and the long side of the vice support plate (321) is not perpendicular to the top end of the recessed part (22). The plurality of groups of vice support plates (32) are arranged along the connecting ring (2), and the oblique directions of the adjacent two groups of vice support plates (32) are opposite. The plurality of main support plates (31) are arranged along the connecting ring (2), and the plurality of groups of vice support plates (32) are located between the adjacent two main support plates (31).

2. The one-piece die cast bicycle hub of claim 1, wherein, The side wall of the side plate (1) is provided with a groove (12), and the groove (12) is located at the top of the side plate (1) and arranged along the side plate (1).

3. The one-piece die cast bicycle hub of claim 1, wherein, The mounting seat (4) is fixed in the connecting ring (2) and located at the bottom end of the protruding part (21). The top surface of the mounting seat (4) is a flat surface, and the mounting hole (41) extends through the top surface of the mounting seat (4).

4. The one-piece die cast bicycle hub of claim 3, wherein, The area of the bottom surface of the mounting seat (4) is larger than the area of the top surface of the mounting seat (4).

5. The one-piece die cast bicycle hub of claim 1, wherein, The area of the bottom surface of the vice support plate (321) is larger than the area of the top surface of the vice support plate (321).

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