Spoke and rim connection structure and wheel set

Abstract

The utility model discloses a spoke and wheel rim's connecting structure, including wheel rim, spoke and inner embedded part, the annular chamber is formed to the wheel rim inside hollow, the wheel rim is set up with a plurality of spoke holes of circumferential array distribution at its inner peripheral side, and is set up with a plurality of perforations of circumferential array distribution at its outer peripheral side, spoke hole and perforation are coaxial opposite one to one, and the wheel rim connecting end of spoke is inserted into annular chamber from spoke hole, and the inner embedded part is sleeved on spoke and is inserted into annular chamber from perforation, and the inner embedded part is configured to be in profile and to be bonded connection with the wall surface of spoke outer peripheral surface and wheel rim inner peripheral side. The utility model discloses still a wheel group, including hub, wheel rim and a plurality of spoke of connecting hub and wheel rim, and this spoke is connected to wheel rim through the connecting structure of spoke and wheel rim of the utility model. The utility model discloses spoke and wheel rim's connecting structure has solved the problem that the integral type structure yield rate is low in traditional bicycle wheel group, and the problem that the split type structure spoke and wheel rim connection reliability is insufficient.

Description

Technical Field

[0001] This utility model relates to the field of bicycle wheel assembly technology, and in particular to the connection structure of spokes and rims and wheel assemblies. Background Technology

[0002] Bicycle wheelsets can be categorized into one-piece wheelsets and two-piece wheelsets based on their structure. One-piece wheelsets are formed by molding or internal pressure-assisted resin transfer molding, integrating the spokes, rim, and hub into a single unit. This offers the advantage of high structural strength but also results in drawbacks such as heavy weight, high manufacturing requirements, and high cost. If any part of the rim's outer ring is uneven or the spoke tension is inconsistent, the wheelset's runout and roundness cannot meet the standards, rendering the entire wheelset unusable and significantly reducing the yield rate. While two-piece wheelsets achieve lightweighting and cost control through their assembly structure, their spoke and rim connection structure also has certain flaws. Existing spoke and rim connection structures often use threaded tightening, requiring additional nuts for fixation, which increases the wheelset's weight and makes it prone to loosening due to vibration. Utility Model Content

[0003] The purpose of this utility model is to provide a connection structure for spokes and rims to solve the problems of low yield rate of integrated structures and insufficient reliability of spoke and rim connection in traditional bicycle wheelsets; the second purpose of this utility model is to provide a wheelset using this connection structure.

[0004] To achieve the above objectives, the technical solution proposed by this utility model is as follows:

[0005] In a first aspect, a connection structure for spokes and a rim is provided, comprising a rim, spokes, and an embedded component. The rim is hollow, forming an annular cavity. The rim has a plurality of spoke holes arranged in a circular array on its inner circumference and a plurality of through holes arranged in a circular array on its outer circumference. The spoke holes and through holes are coaxially aligned. The rim-connecting end of the spoke is inserted into the annular cavity through the spoke holes. The embedded component is fitted onto the spokes and inserted into the annular cavity through the through holes. The embedded component is configured to fit and adhesively connect with the outer circumferential surface of the spokes and the inner circumferential wall surface of the rim.

[0006] Preferably, the embedded part includes a bushing portion and an annular stop portion integrally formed at one end of the bushing portion and protruding from the outer peripheral surface of the bushing portion. The end face of the annular stop portion away from the bushing portion fits into the wall surface of the inner peripheral side of the wheel rim. The inner peripheral surface of the bushing portion and the end face of the annular stop portion away from the bushing portion are coated with adhesive.

[0007] Preferably, the inner circumferential surface of the bushing portion and the end face of the annular stop portion away from the bushing portion are both frosted surfaces.

[0008] Preferably, it also includes a removable adjustment assembly, which includes a shaft sleeve, an external threaded sleeve, and an adjusting nut. The shaft sleeve is fitted onto the spokes and inserted into the annular cavity through the perforation portion. The shaft sleeve is configured to press the embedded part against the inner circumferential wall of the wheel rim. The external threaded sleeve is located outside the annular cavity and is fixed onto the spokes. The adjusting nut is threaded onto the external threaded sleeve and is configured to, when rotating against the shaft sleeve, drive the external threaded sleeve to move axially to tighten or loosen the spokes.

[0009] Preferably, the bushing portion is inserted into the shaft cylinder, the annular stop portion abuts against the inner circumferential wall of the wheel rim and the shaft cylinder, and the end face of the shaft cylinder inserted into the annular cavity matches the end face of the annular stop portion near the bushing portion.

[0010] Preferably, the outer circumferential surface of the spoke is recessed to form an annular locking groove, and the inner circumferential surface of the external threaded sleeve is convex to form an annular locking protrusion that engages with it.

[0011] Preferably, one end of the external threaded sleeve has an axially protruding non-circular clamping portion.

[0012] Preferably, the external threaded sleeve comprises two semi-threaded sleeves formed by axial division.

[0013] Secondly, a wheelset is provided, comprising a hub, a rim, and a plurality of spokes connecting the hub and the rim, wherein the spokes are connected to the rim via a spoke-rim connection structure of the present invention.

[0014] Preferably, the hub includes a hub shell, a shaft, a freehub base, a hub ratchet ring, two first bearings, two second bearings, and two spoke discs. The freehub base is mounted on the shaft via the two first bearings, and the hub shell is mounted on the shaft via the two second bearings. The inner circumferential surface of the hub shell facing the freehub base is machined with an internal spline. The hub ratchet ring is disposed inside the hub shell, and its outer circumferential surface is machined with an external spline that connects to the internal spline. The end face of the hub ratchet ring facing the freehub base is machined with a ratchet ring that meshes with the ratchet ring inside the freehub base. The two spoke discs are sleeved and fixed at both ends of the hub shell for mounting the spokes.

[0015] By adopting the above technical solution, the beneficial effects of this utility model are as follows:

[0016] (1) This utility model adopts an assembly scheme that uses embedded parts to bond and connect the wheel rim and spokes. It can effectively improve the yield rate through component pre-screening and assembly, and has both structural reliability and economy. It solves the problems of large weight, high cost and low yield rate caused by the integral molding process of traditional integrated wheelsets. At the same time, it overcomes the defects of easy loosening and insufficient reliability of split wheelsets using threaded tightening structure.

[0017] (2) This utility model uses a removable adjustment component to assist in the installation of the embedded part, thereby achieving precise positioning of the embedded part, convenient adjustment of the spoke tension, and effective control of wheel set runout and roundness, thus reducing the installation difficulty.

[0018] (3) The wheelset of this utility model adopts the connection structure of this utility model, which can achieve a stable connection without relying on nuts, effectively avoiding the loosening problem caused by vibration of traditional split wheelsets; by assembling qualified parts through pre-screening, it avoids the defect of the whole wheelset being scrapped due to local defects, and simplifies the connection structure through bonding process. Under the same wheelset frame height and weight conditions, it achieves better mechanical performance and reliability, and has the advantages of lightweight, high rigidity and low scrap rate. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the axial isometric cross-section of the wheel rim in Example 1.

[0020] Figure 2 This is a partial radial cross-sectional view of the wheel rim in Embodiment 1.

[0021] Figure 3 This is a partial radial cross-sectional schematic diagram of the connection structure between the spokes and the rim in Embodiment 1.

[0022] Figure 4 for Figure 3 A three-dimensional structural diagram of the embedded part.

[0023] Figure 5 This is a partial radial cross-sectional schematic diagram of the connection structure between the spokes and the rim in Embodiment 2.

[0024] Figure 6 for Figure 5 An explosion diagram.

[0025] Figure 7 for Figure 5 A schematic diagram of the structure of the threaded sleeve and spokes.

[0026] Figure 8 This is a schematic diagram of the external threaded sleeve and spokes in other embodiments of this utility model.

[0027] Figure 9 This is a three-dimensional structural diagram of the wheel assembly in Example 3.

[0028] Figure 10 for Figure 9 Isometric sectional view of the center hub (spoke discs are hidden).

[0029] Figure 11 and Figure 12 This is a schematic diagram of the disassembled structure of the hub in Example 3.

[0030] The components are as follows: 1. Wheel rim; 11. Annular chamber; 12. Spoke hole; 13. Perforation; 2. Spoke; 21. Annular snap-fit ​​groove; 3. Embedded part; 31. Bushing part; 32. Annular stop part; 4. Bushing; 41. End face of bushing part inserted into the annular chamber; 5. External threaded sleeve; 51. Annular snap-fit ​​protrusion; 52. Non-circular clamping part; 53. Semi-threaded sleeve; 6. Adjusting nut; 7. Hub; 71. Hub shell; 711. Internal spline; 72. Shaft core; 73. Freehub base; 731. Freehub base ratchet ring; 74. Hub ratchet ring; 741. External spline; 742. Racket ring; 75. First bearing; 76. Second bearing; 77. Spoke disc. Detailed Implementation

[0031] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0032] Example 1

[0033] Reference Figures 1-4 In this embodiment, the connection structure between the spokes and the rim includes a rim 1, spokes 2, and an embedded part 3. The rim 1 has a hollow interior forming an annular cavity 11. The rim 1 has several spoke holes 12 arranged in a circular array on its inner circumference and several through holes 13 arranged in a circular array on its outer circumference. The spoke holes 12 and through holes 13 are coaxially aligned. The rim-connecting end of the spoke 2 is inserted into the annular cavity 11 through the spoke holes 12. In this embodiment, the embedded part 3 is fitted onto the spoke 2 and inserted into the annular cavity 11 through the through holes 13. The embedded part 3 is configured to fit and bond with the outer circumferential surface of the spoke 2 and the inner circumferential surface of the rim 1.

[0034] Specifically, the embedded part 3 in this embodiment includes a bushing portion 31 and an annular stop portion 32 integrally formed at one end of the bushing portion 31 and protruding from the outer peripheral surface of the bushing portion 31. The end face 321 of the annular stop portion 32 away from the bushing portion 31 fits into the inner peripheral wall surface of the rim 1. For example, in this embodiment, the inner peripheral wall surface of the rim 1 is arc-shaped, and the corresponding end face 321 of the annular stop portion 32 away from the bushing portion 31 is arc-shaped enough to fit completely against it. The inner peripheral surface of the bushing portion 31 and the end face 321 of the annular stop portion 32 away from the bushing portion 31 are coated with an adhesive, such as epoxy resin or acrylic resin, to bond the embedded part 3, the spoke 2, and the rim 1 together.

[0035] This embodiment adopts an assembly scheme in which the rim 1 and spoke 2 are bonded together by the embedded part 3. The yield rate can be effectively improved through component pre-screening and assembly. It has both structural reliability and economy, and solves the problems of large weight, high cost and low yield rate caused by the integral molding process of traditional one-piece wheelsets. At the same time, it overcomes the defects of easy loosening and insufficient reliability of the threaded tightening structure of split wheelsets.

[0036] In this embodiment, the inner circumferential surface of the bushing portion 31 of the embedded part 3 and the end face 321 of the annular stop portion 32 away from the bushing portion 31 are both frosted surfaces, which can be formed by grinding or surface sandblasting. Grinding or sandblasting can remove the oxide layer and impurities from the bonding surface of the embedded part 3 (i.e., the inner circumferential surface of the bushing portion 31 and the end face 321 of the annular stop portion 32 away from the bushing portion 31), increase the surface roughness, and improve the wettability and bonding strength of the adhesive. By optimizing the microstructure of the bonding surface of the embedded part 3, geometrical abrupt changes in the bonding surface can be eliminated, stress concentration can be reduced, and stress distribution can be made more uniform, reducing the risk of bonding failure. The bonding surface after grinding or sandblasting is easier to achieve seamless bonding, further strengthening the overall structural integrity.

[0037] The embedded part 3 can be made of lightweight materials, such as carbon fiber reinforced resin or aluminum alloy, to further improve the lightweight of the wheelset.

[0038] Example 2

[0039] Reference Figures 5-8 The spoke and rim connection structure of this embodiment includes a rim 1, spokes 2, an embedded part 3, and a removable adjustment assembly. The rim 1 has a hollow interior forming an annular chamber 11. The rim 1 has several spoke holes 12 arranged in a circular array on its inner circumference and several through holes 13 arranged in a circular array on its outer circumference. The spoke holes 12 and through holes 13 are coaxially aligned. The spoke 2's rim 1 connection end is inserted into the annular chamber 11 through the spoke hole 12 and extends out through the through hole 13. The embedded part 3 is fitted onto the spoke 2 and inserted into the annular chamber 11 through the through hole 13. The embedded part 3 is configured to fit and bond with the outer circumferential surface of the spoke 2 and the inner circumferential wall surface of the rim 1. The adjustment assembly includes a shaft sleeve 4, an external threaded sleeve 5, and an adjusting nut 6. A bushing 4 is fitted onto the spokes 2 and partially inserted into the annular chamber 11 through the perforation 13. The bushing 4 is configured to press the embedded part 3 against the inner circumferential wall of the rim 1. An external threaded sleeve 5 is located outside the annular chamber 11 and is fixed onto the spokes 2. The outer circumferential surface of the external threaded sleeve 5 has threads. An adjusting nut 6 is threaded onto the external threaded sleeve 5 and is configured to rotate against the bushing 4, thereby causing the external threaded sleeve 5 to move axially to tighten or loosen the spokes 2, adjusting the tension of the spokes 2, the runout of the rim 1, and the roundness. After the embedded part 3 is bonded and fixed to the spokes 2 and the rim 1, the bushing 4, the external threaded sleeve 5, and the adjusting nut 6 are removed.

[0040] In this embodiment, the embedded part 3 includes a bushing portion 31 and an annular stop portion 32 integrally formed at one end of the bushing portion 31 and protruding from the outer peripheral surface of the bushing portion 31. The end face 321 of the annular stop portion 32 away from the bushing portion 31 fits with the inner peripheral wall of the wheel rim 1, and the end face 41 of the shaft cylinder 4 inserted into the annular cavity 11 fits with the end face 322 of the annular stop portion 32 near the bushing portion 31. The shaft cylinder 4 is inserted into the annular cavity 11 until the bushing portion 31 is inserted into the shaft cylinder 4, and the annular stop portion 32 abuts against the inner peripheral wall of the wheel rim 1 and the shaft cylinder 4 to achieve positioning.

[0041] In this embodiment, the outer circumferential surface of the spoke 2 is recessed to form an annular locking groove 21, and the inner circumferential surface of the external threaded sleeve 5 is circumferentially protruded to form an annular locking protrusion 51 that engages with the annular locking groove 21. The axial cross-sections of both the annular locking protrusion 51 and the annular locking groove 21 are preferably arc-shaped, gradually changing from their middle parts to both ends in the axial direction, so as to directly insert and secure the external threaded sleeve 5 and the spoke 2.

[0042] Reference Figure 8 In other embodiments of this utility model, in order to facilitate the installation of the external threaded sleeve 5, the external threaded sleeve 5 can be designed to consist of two half threaded sleeves 53 formed by axial division. After aligning the two half threaded sleeves 53 with the annular snap-fit ​​groove 21, the adjusting nut 6 is screwed on so that the two half threaded sleeves 53 hug the spoke 2, thereby achieving axial and circumferential fixation of the external threaded sleeve 5.

[0043] To facilitate the installation and removal of the external threaded sleeve 5 and the rotation of the adjusting nut 6, and to avoid damaging the external thread of the external threaded sleeve 5 and affecting the spokes 2, one end of the external threaded sleeve 5 has an axially protruding non-circular clamping part 52, so that the non-circular clamping part 52 can be clamped with a tool. The cross-section of the non-circular clamping part 52 is, for example, quadrilateral, pentagonal, or hexagonal.

[0044] By adjusting the components to assist in the installation of the embedded part 3, the precise positioning of the embedded part 3 is achieved, the tension of the spoke 2 is easily adjusted, and the wheel set runout and roundness are effectively controlled, reducing the installation difficulty. In the adhesive curing stage, uniform pressure is provided to ensure that the adhesive between the embedded part 3 and the wheel rim 1 and spoke 2 fully fills the gaps and improves the bonding strength.

[0045] The assembly steps of the connection structure between the rim 1 and the spoke 2 in this embodiment are as follows: After the hub connection end of the spoke 2 is connected to the hub 7, the rim connection end of the spoke 2 is inserted into the annular cavity 11 through the spoke hole 12 and protrudes from the through hole 13. After applying adhesive to the inner circumferential surface of the bushing portion 31 of the embedded part 3 and the end face 321 of the annular stop portion 32 away from the bushing portion 31, the embedded part 3 is fitted onto the spoke 2 from the rim connection end of the spoke 2 and pushed into the annular cavity 11 through the through hole 13 until it fits against the inner circumferential wall of the rim 1. Then, the axle cylinder 4 is fitted onto the spoke 2 from the rim connection end of the spoke 2 and pushed into the annular cavity 11 through the through hole 13 until it fits against the embedded part 3. Next, the external threaded sleeve 5 is fitted and fixed onto the spoke 2 from the rim connection end of the spoke 2, and the adjusting nut 6 is screwed onto the external threaded sleeve 5 until it abuts against the axle cylinder 4. Rotating the adjusting nut 6 causes the external threaded sleeve 5 to move axially, tightening or loosening the spokes 2 to the target tension. Finally, after the adhesive has cured, remove the adjusting nut 6, the external threaded sleeve 5, and the shaft sleeve 4 in sequence, and cut off the portion of the spokes 2 that protrudes from the through hole 13.

[0046] Example 3

[0047] like Figures 9-12 As shown, the wheelset of this embodiment includes a hub 7, a rim 1, and a plurality of spokes 2 connecting the hub 7 and the rim 1. The spokes 2 are connected to the rim 1 through the spoke and rim connection structure of Embodiment 1 or Embodiment 2.

[0048] The hub 7 in this embodiment includes a hub shell 71, a core 72, a freehub base 73, a hub ratchet ring 74, two first bearings 75, two second bearings 76, and two spoke discs 77. The freehub base 73 is mounted on the core 72 via the two first bearings 75, and the hub shell 71 is mounted on the core 72 via the two second bearings 76. An internal spline 711 is machined on the inner circumferential surface of the hub shell 71 facing the freehub base 73. The hub ratchet ring 74 is located inside the hub shell 71, and an external spline 741 connected to the internal spline 711 is machined on the outer circumferential surface of the hub ratchet ring 74. A ratchet ring 742, meshing with the freehub base ratchet ring 731 inside the freehub base 73, is machined on the end face of the hub ratchet ring 74 facing the freehub base 73. The two spoke discs 77 are fitted and fixed at both ends of the hub shell 71 for mounting the spokes 2.

[0049] In this embodiment, the ratchet ring is eliminated, and the internal spline 711 is directly machined inside the hub shell 71 to install the hub ratchet ring 74, which effectively reduces the weight of the hub. At the same time, the hub ratchet ring 74 can be enlarged, which is equivalent to increasing the contact area between the hub ratchet ring 74 and the hub, making it more conducive to driving the wheel assembly.

[0050] The parts of the hub 7, rim 1 and spokes 2 not described in this embodiment are the same as or can be implemented using existing technology, and will not be described in detail here.

[0051] Although the present invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that various changes in form and detail to the present invention without departing from the spirit and scope of the present invention as defined in the appended claims are within the scope of protection of the present invention.

Claims

1. A connection structure for spokes and a rim, characterized in that, include: The wheel rim (1) has a hollow interior forming an annular cavity (11). The wheel rim (1) has several spoke holes (12) arranged in a circular array on its inner circumference and several perforations (13) arranged in a circular array on its outer circumference. The spoke holes (12) and perforations (13) are coaxially opposite each other. Spokes (2), the wheel rim connecting end of which is inserted into the annular cavity (11) through the spoke hole (12); An embedded part (3) is fitted onto the spoke (2) and inserted into the annular cavity (11) through the perforation (13). The embedded part (3) is configured to fit and bond with the outer circumferential surface of the spoke (2) and the inner circumferential side of the wheel rim (1).

2. The connection structure of spokes and rim according to claim 1, characterized in that, The embedded part (3) includes: a bushing part (31) and an annular stop part (32) integrally formed on one end of the bushing part (31) and protruding from the outer peripheral surface of the bushing part (31); the end face of the annular stop part (32) away from the bushing part (31) fits with the inner peripheral wall of the wheel rim (1), and the inner peripheral surface of the bushing part (31) and the end face of the annular stop part (32) away from the bushing part (31) are coated with adhesive.

3. The connection structure of spokes and rim according to claim 2, characterized in that, The inner circumferential surface of the bushing portion (31) and the end face of the annular stop portion (32) away from the bushing portion (31) are both frosted surfaces.

4. The connection structure between the spokes and the rim according to claim 1, characterized in that, It also includes a removable adjustment component, said adjustment component comprising: A shaft sleeve (4) is fitted onto the spokes (2) and inserted into the annular cavity (11) through the perforation (13). The shaft sleeve (4) is configured to press the embedded part (3) against the inner circumferential wall of the wheel rim (1). The external threaded sleeve (5) is located outside the annular cavity (11) and is fixed to the spoke (2); The adjusting nut (6) is threaded onto the external threaded sleeve (5) and is configured to rotate against the shaft sleeve (4) to drive the external threaded sleeve (5) to move axially to tighten or loosen the spokes (2).

5. The connection structure between the spokes and the rim according to claim 4, characterized in that, The embedded part (3) includes: a bushing part (31) and an annular stop part (32) integrally formed on one end of the bushing part (31) and protruding from the outer peripheral surface of the bushing part (31); the end face of the annular stop part (32) away from the bushing part (31) fits with the wall surface of the inner peripheral side of the wheel rim (1). The bushing (31) is inserted into the shaft cylinder (4), and the annular stop (32) abuts against the inner circumferential wall of the wheel rim (1) and the shaft cylinder (4); the end face of the shaft cylinder (4) inserted into the annular cavity (11) matches the end face of the annular stop (32) near the bushing (31).

6. The connection structure of spokes and rim according to claim 4, characterized in that, The spoke (2) has a circumferentially recessed outer circumferential surface to form an annular snap-fit ​​groove (21), and the external threaded sleeve (5) has a circumferentially protruding inner circumferential surface to form an annular snap-fit ​​protrusion (51) that snaps into it.

7. The connection structure of spokes and rim according to claim 4, characterized in that, One end of the external threaded sleeve (5) has an axially protruding non-circular clamping part (52).

8. The spoke and rim connection structure according to any one of claims 4 to 7, characterized in that, The external threaded sleeve (5) includes two semi-threaded sleeves (53) formed by dividing along the axial direction.

9. A wheelset, characterized in that, It includes a hub (7), a rim (1) and a plurality of spokes (2) connecting the hub (7) and the rim (1), said spokes (2) being connected to the rim (1) by a spoke and rim connection structure as described in claim 1.

10. The wheelset according to claim 9, characterized in that, The hub (7) includes: hub shell (71), axle core (72), freehub base (73), hub ratchet ring (74), two first bearings (75), two second bearings (76) and two spoke discs (77); The tower base (73) is mounted on the shaft core (72) by two first bearings (75); The hub shell (71) is mounted on the shaft core (72) by two second bearings (76). The inner circumferential surface of the hub shell (71) facing the freehub base (73) is machined with an inner spline (711). The hub ratchet ring (74) is located inside the hub shell (71). The outer circumferential surface of the hub ratchet ring (74) is machined with an outer spline (741) that connects with the inner spline (711). The end face of the hub ratchet ring (74) facing the freehub base (73) is machined with a ratchet ring (742) that meshes with the freehub base ratchet ring (731) inside the freehub base (73). The two spoke discs (77) are fitted and fixed at both ends of the drum shell (71) for mounting the spokes (2).

Images