Bicycle hub and bicycle

Abstract

The bicycle hub comprises a middle shaft, a hub shell, a left side bearing and a right side bearing, the hub shell is rotatably arranged on the middle shaft in a sleeving mode through the left side bearing and the right side bearing, and the bicycle hub is characterized in that an outer ring of the left side bearing is tightly matched with the hub shell, and an inner ring of the left side bearing is movably arranged on the middle shaft in a sleeving mode; an outer ring of the right bearing is tightly matched with the hub shell, an inner ring of the right bearing is fixedly arranged relative to the middle shaft, the middle shaft is provided with a left shaft spacer sleeve located on the left side of the left bearing, an elastic piece is arranged between the left shaft spacer sleeve and the inner ring of the left bearing, and the elastic piece can apply opposite elastic force to the inner ring of the left bearing and the middle shaft. Therefore, the clearance between the left bearing and the right bearing is eliminated.

Description

Technical Field

[0001] This utility model relates to bicycle accessories, and more particularly to a bicycle hub. Background Technology

[0002] A bicycle hub mainly consists of a bottom bracket, hub housing, left bearing, right bearing, and freehub. A one-way drive mechanism connects the freehub to the hub housing. The hub housing is rotatably mounted on the bottom bracket via the left and right bearings. The freehub is rotatably mounted on the bottom bracket and located to the right of the right bearing. Because these bearings have some play, it is crucial to eliminate this play during hub assembly; otherwise, the wheel will wobble. Traditional designs lack a mechanism to adjust play; during assembly, the outer ring of the bearing is directly pressed against the hub housing. Due to variations in machining tolerances, the bearing positions on the hub housing cannot be aligned with consistent assembly force. Excessive assembly force results in uneven bearing rotation, while insufficient force leads to play and wheel wobble. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of existing technologies by providing a bicycle hub that can eliminate bearing clearance.

[0004] The objective of this utility model is achieved through the following technical solution:

[0005] A bicycle hub includes a bottom bracket, a hub housing, a left bearing, and a right bearing. The hub housing is rotatably mounted on the bottom bracket via the left and right bearings. The hub is characterized by: the outer ring of the left bearing tightly fitting the hub housing; the inner ring of the left bearing movably mounting on the bottom bracket; the outer ring of the right bearing tightly fitting the hub housing; and the inner ring of the right bearing fixed relative to the bottom bracket. The bottom bracket has a left axle retainer located to the left of the left bearing. An elastic element is provided between the left axle retainer and the inner ring of the left bearing. This elastic element can apply opposing elastic forces to the inner ring of the left bearing and the bottom bracket, thereby eliminating play between the left and right bearings.

[0006] In the above scheme, the elastic element can simultaneously apply elastic forces in opposite directions to the inner ring and the central shaft of the left bearing. The elastic force causes the inner ring of the left bearing to move to the right to eliminate the clearance of the left bearing, and the elastic force causes the central shaft to move to the left, thereby causing the inner ring of the right bearing to move to the left to eliminate the clearance of the right bearing.

[0007] The outer circumferential surface of the left end of the central shaft is provided with an external thread, and the inner circumferential surface of the left shaft retainer is provided with an internal thread that mates with the external thread. The use of a threaded structure facilitates the installation of the left shaft retainer and also facilitates the installation of the elastic element.

[0008] The inner circumferential surface of the left axle retainer is provided with a first limiting step that can abut against the left end of the central shaft. The first limiting step can restrict the installation position of the left axle retainer and prevent excessive compression of the elastic element.

[0009] The inner circumferential surface of the hub housing is provided with a second limiting step that can abut against the right end of the outer ring of the left bearing. The second limiting step can restrict the position of the outer ring of the left bearing. The elastic element and the second limiting step are arranged opposite each other to ensure the installation position of the left bearing and prevent the left bearing from shifting.

[0010] The inner circumferential surface of the hub housing is provided with a third limiting step that can abut against the left end of the outer ring of the right bearing. When the elastic element drives the central axis to move to the left, causing the inner ring of the right bearing to move to the left, the third limiting step can restrict the outer ring of the right bearing from moving to the left, thereby preventing the right bearing from shifting.

[0011] The outer circumferential surface of the central shaft is provided with a fourth limiting step that can abut against the left end of the inner ring of the right bearing. The fourth limiting step is used to restrict the installation position of the inner ring of the right bearing.

[0012] It also includes a hub base, which is rotatably mounted on the central shaft via a left hub base bearing and a right hub base bearing and is located to the right of the right bearing. A first spacer is fitted on the central shaft between the inner ring of the right bearing and the inner ring of the left hub base bearing. The left bearing is located at the left end of the central shaft, and the right bearing is located approximately in the middle of the central shaft. That is, the right bearing is the main load-bearing component, and the left bearing is the secondary load-bearing component. The inner ring of the right bearing is fixed relative to the central shaft, which can effectively prevent the shear force and wear generated by the inner ring of the right bearing on the central shaft. Even if the inner ring of the left bearing is movably mounted on the central shaft, the stability of the hub housing support can be guaranteed.

[0013] A second spacer is fitted on the central shaft between the inner rings of the left and right tower base bearings. The second spacer is used to restrict the installation position of the inner rings of the left and right tower base bearings.

[0014] The elastic element is a wave spring or a helical compression spring, which facilitates product assembly.

[0015] A bicycle, characterized in that it includes the aforementioned bicycle hub. Attached Figure Description

[0016] The present invention will now be described in further detail with reference to the accompanying drawings.

[0017] Figure 1 This is the front view of the present invention.

[0018] Figure 2 for Figure 1 A sectional view along the AA direction.

[0019] Figure 3This is an exploded view of the components of this utility model.

[0020] Figure 4 This is an exploded view of the components from another perspective of the present invention.

[0021] Figure 5 for Figure 2 Enlarged view of part A. Detailed Implementation

[0022] Reference Figures 1 to 5 As shown, a bicycle hub includes a bottom bracket 1, a hub housing 2, a left bearing 3, a right bearing 4, and a freehub base 6. The hub housing 2 is rotatably mounted on the bottom bracket 1 via the left bearing 3 and the right bearing 4. The freehub base 6 is rotatably mounted on the bottom bracket 1 via the left freehub base bearing 71 and the right freehub base bearing 72, and is located to the right of the right bearing 4. The outer ring 31 of the left bearing 3 is tightly fitted with the hub housing 2, and the inner ring 32 of the left bearing 3 is movably mounted on the bottom bracket 1. The outer ring 41 of the right bearing 4 is tightly fitted with the hub housing 2, and the inner ring 42 of the right bearing 4 is fixed relative to the bottom bracket 1. The bottom bracket 1 is provided with a left axle retainer 51 located to the left of the left bearing 3, and a space is provided between the left axle retainer 51 and the inner ring 32 of the left bearing 3. There is an elastic element 8, which can apply opposite elastic forces to the inner ring 32 of the left bearing 3 and the central shaft 1, thereby eliminating the clearance between the left bearing 3 and the right bearing 4. The elastic element 8 is a wave spring, but a helical compression spring or other elastic element can also be selected as needed. The outer circumferential surface of the left end of the central shaft 1 is provided with an external thread 11, and the inner circumferential surface of the left shaft retainer 51 is provided with an internal thread 511 that mates with the external thread 11. The use of a threaded structure can facilitate the installation of the left shaft retainer 51 and the wave spring. The inner circumferential surface of the left shaft retainer 51 is provided with a first limiting step 512 that can abut against the left end of the central shaft 1. The first limiting step 512 can limit the installation position of the left shaft retainer 51 and prevent excessive compression of the elastic element 8.

[0023] In the above scheme, the elastic element 8 can simultaneously apply elastic forces in opposite directions to the inner ring 32 of the left bearing 3 and the central shaft 1. This elastic force causes the inner ring 32 of the left bearing 3 to move to the right to eliminate the clearance of the left bearing 3, and the elastic force causes the central shaft 1 to move to the left, thereby causing the inner ring 42 of the right bearing 4 to move to the left to eliminate the clearance of the right bearing 4.

[0024] The inner circumferential surface of the hub housing 2 is provided with a second limiting step 21 that can abut against the right end of the outer ring of the left bearing 3. The second limiting step 21 can restrict the position of the outer ring of the left bearing 3. The elastic element 8 and the second limiting step 21 are arranged opposite each other, and their interaction can ensure the installation position of the left bearing 3 and prevent the left bearing 3 from shifting. The inner circumferential surface of the hub housing 2 is provided with a third limiting step 22 that can abut against the left end of the outer ring 41 of the right bearing 4. When the elastic element 8 drives the central shaft 1 to move to the left, causing the inner ring 42 of the right bearing 4 to move to the left, the third limiting step 22 can restrict the outer ring 41 of the right bearing 4 to move to the left, thereby preventing the right bearing 3 from shifting. The side bearing 4 is offset. The outer circumferential surface of the central shaft 1 is provided with a fourth limiting step 12 that can abut against the left end of the inner ring 42 of the right bearing 4. The fourth limiting step 12 is used to limit the installation position of the inner ring 42 of the right bearing 4. A first spacer 91 is sleeved on the central shaft 1 between the inner ring 42 of the right bearing 4 and the inner ring of the left tower base bearing 71. A second spacer 92 is sleeved on the central shaft 1 between the inner ring of the left tower base bearing 71 and the inner ring of the right tower base bearing 72. The second spacer 92 is used to limit the installation position of the inner ring of the left tower base bearing 71 and the inner ring of the right tower base bearing 72. A right shaft retainer 52 is provided at the right end of the central shaft 1.

[0025] The left bearing 3 is located at the left end of the central shaft 1, and the right bearing 4 is located approximately in the middle of the central shaft 1. That is, the right bearing 4 is the main force-bearing component, and the left bearing 3 is the secondary force-bearing component. The inner ring 42 of the right bearing 4 is fixed relative to the central shaft 1, which can effectively prevent the shear force and wear generated by the inner ring 42 of the right bearing 4 on the central shaft 1. Even if the inner ring of the left bearing 3 is movably sleeved on the central shaft 1, the stability of the hub housing 2 can still be guaranteed.

[0026] The above description is merely a preferred embodiment of the present utility model, and therefore cannot be construed as limiting the scope of the present utility model. All equivalent changes and modifications made in accordance with the scope of the patent application and the contents of the specification of the present utility model shall still fall within the scope of the patent of the present utility model.

Claims

1. A bicycle hub, comprising a bottom bracket, a hub housing, a left bearing, and a right bearing, wherein the hub housing is rotatably mounted on the bottom bracket via the left and right bearings, characterized in that: The outer ring of the left bearing fits tightly with the hub housing, and the inner ring of the left bearing is movably fitted onto the bottom shaft. The outer ring of the right bearing fits tightly with the hub housing, and the inner ring of the right bearing is fixed relative to the bottom shaft. The bottom shaft is provided with a left shaft retainer located to the left of the left bearing. An elastic element is provided between the left shaft retainer and the inner ring of the left bearing. The elastic element can apply opposite elastic forces to the inner ring of the left bearing and the bottom shaft, thereby eliminating the clearance between the left and right bearings.

2. A bicycle hub according to claim 1, characterized in that: The outer circumferential surface of the left end of the central shaft is provided with an external thread, and the inner circumferential surface of the left shaft retainer is provided with an internal thread that mates with the external thread.

3. A bicycle hub according to claim 2, characterized in that: The inner circumferential surface of the left axle retainer is provided with a first limiting step that can abut against the left end of the central axle.

4. A bicycle hub according to claim 1, characterized in that: The inner circumferential surface of the hub housing is provided with a second limiting step that can abut against the right end of the outer ring of the left bearing.

5. A bicycle hub according to claim 1, characterized in that: The inner circumferential surface of the hub housing is provided with a third limiting step that can abut against the left end of the outer ring of the right bearing.

6. A bicycle hub according to claim 1, characterized in that: The outer circumferential surface of the central shaft is provided with a fourth limiting step that can abut against the left end of the inner ring of the right bearing.

7. A bicycle hub according to claim 6, characterized in that: It also includes a tower base, which is rotatably mounted on the central shaft via a left tower base bearing and a right tower base bearing and is located to the right of the right bearing. A first spacer is mounted on the central shaft between the inner ring of the right bearing and the inner ring of the left tower base bearing. The left bearing is located at the left end of the central shaft, and the right bearing is located approximately in the middle of the central shaft.

8. A bicycle hub according to claim 7, characterized in that: A second spacer is fitted onto the central shaft between the inner ring of the left tower base bearing and the inner ring of the right tower base bearing.

9. A bicycle hub according to any one of claims 1 to 8, characterized in that: The elastic element is a wave spring or a helical compression spring.

10. A bicycle, characterized in that: Including the bicycle hub as described in any one of claims 1 to 8.

Images