A front hub structure of a bicycle

Abstract

The utility model provides a kind of bicycle front hub structure, it is related to bicycle technical field, including axle and the hub main shaft and hub shell that are sequentially sleeved from inside to outside on the axle, the inside both ends of the hub shell are equipped with bearing for with the hub main shaft adaptation, the bearing is configured to be located along the axial direction via the side cover assembly being arranged at the both ends of the hub shell;Wherein, the side cover assembly includes sub-cover and female cap, the sub-cover is equipped with first assembly hole for with the axle adaptation, the female cap is equipped with second assembly hole for with the axle adaptation, the sub-cover can be detachably sleeved in the second assembly hole, the aperture of the second assembly hole is different from the aperture of the first assembly hole, so that the side cover assembly can be adapted to different diameter axle. To improve the problem of low compatibility of existing bicycle front hub structure.

Description

Technical Field

[0001] This utility model relates to the field of bicycle technology, and more specifically, to a bicycle front hub structure. Background Technology

[0002] Existing bicycle front hub structures typically include an axle and a hub spindle and hub housing, which are sequentially mounted on the axle from the inside out. To reduce rotational resistance and ensure smooth transmission, bearings are installed at both ends inside the hub housing. These bearings are mounted on the hub spindle and are axially limited by side covers mounted at both ends of the hub housing. In this type of structure, the axle passes through the side covers and the hub spindle. Therefore, the dimensions of the side covers, hub spindle, hub housing, and bearings are all affected by the axle dimensions. If the axle dimensions change, the dimensions of these components must also change. This means that even hub housings with the same appearance require new molds for related components like the hub housing and hub spindle when adapting to axles of different diameters. This is not only costly but also inconvenient for warehousing and production line management, and prone to material mixing issues. Utility Model Content

[0003] This utility model discloses a bicycle front hub structure, which aims to improve the problem of low compatibility of existing bicycle front hub structures.

[0004] The present invention adopts the following solution:

[0005] A bicycle front hub structure includes an axle and a hub spindle and a hub housing sequentially sleeved on the axle from the inside out. Bearings for fitting the hub spindle are installed at both ends of the hub housing. The bearings are configured to be axially limited via side cover assemblies disposed at both ends of the hub housing. The side cover assembly includes a female cover and a male cover. The female cover has a first mounting hole for fitting the axle, and the female cover has a second mounting hole for fitting the axle. The female cover is detachably fitted into the second mounting hole. The diameter of the second mounting hole is different from the diameter of the first mounting hole, allowing the side cover assembly to accommodate axles of different diameters.

[0006] As a further improvement, one end of the shaft is provided with a limiting part, and the other end is used to connect with a nut. The female cover is abutted between the bearing and the limiting part or between the bearing and the nut, so that the bearing is axially limited.

[0007] As a further improvement, the female cover has a limiting groove at one end away from the bearing that communicates with the second assembly hole, and a boss is provided at one end of the female cover away from the bearing. The boss is embedded in the limiting groove and abuts against the limiting part or nut to limit the female cover axially.

[0008] As a further improvement, the female cover is provided with a shaft hole communicating with the second mounting hole, the end of the hub spindle is inserted into the shaft hole, and the female cover is configured to be inserted into the inner hole of the hub spindle.

[0009] As a further improvement, the diameter of the second assembly hole, the diameter of the inner hole, and the outer diameter of the sub-cover are all equal, and a sealing element is fitted between the sub-cover and the mother cover, and between the mother cover and the hub spindle.

[0010] As a further improvement, the sub-cover extends out of the outer wall of the inner hole and is recessed with a relief groove.

[0011] As a further improvement, a positioning part is provided along the outer wall of the hub spindle corresponding to the positions of the two bearings. The positioning part abuts against the bearings to limit the hub spindle axially.

[0012] As a further improvement, the end of the female cover near the bearing extends outward to form a stop portion for shielding the bearing, and the stop portion is provided with a plane for abutting against the connecting member.

[0013] As a further improvement, the diameter of the first assembly hole is 12 mm.

[0014] As a further improvement, the diameter of the second assembly hole is 15 mm.

[0015] By adopting the above technical solution, the present invention can achieve the following technical effects:

[0016] This application utilizes a side cover assembly to enable the front hub structure to accommodate two different diameter shafts, thereby improving the compatibility of the front hub structure. This significantly reduces mold and warehousing costs, facilitating manufacturing. Furthermore, only the sub-cover needs to be replaced; there's no need to change the dimensions or disassemble other components such as the hub spindle or hub housing, making it convenient and quick. For example, the first mounting hole has a diameter of 12mm to accommodate a 12mm diameter shaft, and the second mounting hole has a diameter of 15mm to accommodate a 15mm diameter shaft. When a 12mm shaft is needed, the sub-cover is fitted inside the female cover to mate the first mounting hole with the shaft. When a 15mm shaft is needed, the sub-cover is removed from the female cover, meaning only the female cover is installed, to mate the second mounting hole with the shaft. This achieves compatibility between the front hub structure and two commonly used shaft sizes. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 and Figure 2 This is a structural schematic diagram of one embodiment of the present invention from different perspectives;

[0019] Figure 3 This is a cross-sectional view of one embodiment of the present invention;

[0020] Figure 4 yes Figure 3 Cross-sectional view when the sub-cover is removed;

[0021] Figure 5 This is a structural schematic diagram of the assembly of the shaft in one embodiment of this utility model;

[0022] Figure 6 This is a schematic diagram of the structure of the female cover and the shaft when they are adapted to each other according to one embodiment of the present invention;

[0023] Figure 7 This is a schematic diagram of the structure of the sub-cover and shaft when they are adapted to each other according to one embodiment of the present invention;

[0024] Figure 8 This is a schematic diagram of the shaft structure according to one embodiment of the present invention;

[0025] Figure 9 This is a schematic diagram of the sub-cover structure of one embodiment of the present invention;

[0026] Figure 10 This is a schematic diagram of the structure of the female cover according to one embodiment of the present utility model;

[0027] Figure 11 This is an exploded view of one embodiment of the present invention.

[0028] icon:

[0029] 1-Shaft; 11-Limiting part; 12-Threaded part;

[0030] 2- Hub spindle; 21- Inner hole; 22- Positioning part;

[0031] 3- Hub shell;

[0032] 4-Bearings;

[0033] 5-Side cover assembly; 51-Sub-cover; 511-First mounting hole; 512-Boss; 513-Relief groove; 52-Female cover; 521-Second mounting hole; 522-Limiting groove; 523-Shaft hole; 524-Stop part;

[0034] 6-Seals. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely represents selected embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0036] The terms “top,” “bottom,” “upper,” “lower,” “left,” “right,” “front,” “back,” and similar expressions used in this document are for illustrative purposes only. The terms “first,” “second,” etc., are only used to distinguish different objects and should not be construed as indicating or implying relative importance or the quantity, specific order, or primary or secondary relationship of the indicated technical features. The term “several” means one or more, and “multiple” means two or more, unless otherwise explicitly specified.

[0037] Example

[0038] Combination Figures 1 to 11 This embodiment provides a bicycle front hub structure, including a shaft 1 and a hub spindle 2 and a hub housing 3 sequentially sleeved on the shaft 1 from the inside out. Both ends of the hub housing 3 are equipped with bearings 4 for fitting the hub spindle 2. The bearings 4 are configured to be axially limited via side cover assemblies 5 disposed at both ends of the hub housing 3. The side cover assembly 5 includes a sub-cover 51 and a female cover 52. The sub-cover 51 has a first mounting hole 511 for fitting the shaft 1, and the female cover 52 has a second mounting hole 521 for fitting the shaft 1. The sub-cover 51 is detachably sleeved in the second mounting hole 521. The diameter of the second mounting hole 521 is different from the diameter of the first mounting hole 511, so that the side cover assembly 5 can fit shafts 1 of different diameters.

[0039] For example, the first mounting hole 511 has a diameter of 12mm to accommodate a shaft 1 with a diameter of 12mm. The second mounting hole 521 has a diameter of 15mm to accommodate a shaft 1 with a diameter of 15mm. When a 12mm shaft 1 needs to be mounted, the sub-cover 51 is fitted inside the female cover 52 to allow the first mounting hole 511 to fit with the shaft 1. When a 15mm shaft 1 needs to be mounted, the sub-cover 51 is removed from the female cover 52, i.e., only the female cover 52 is installed, to allow the second mounting hole 521 to fit with the shaft 1. Replacing the two shafts 1 only requires removing and installing the sub-cover 51, which is convenient and quick. Both ends of the shaft 1 are fitted with side cover assemblies 5, thus ensuring the concentricity of the shaft 1 and the hub spindle 2 and preventing shaking or abnormal noise during transmission.

[0040] It should be noted that in this embodiment, by setting the side cover assembly 5, the front hub structure can be adapted to two different diameter shafts 1. Only the sub-cover 51 needs to be disassembled and replaced. There is no need to change the size or disassemble other components such as the hub spindle 2 and the hub housing 3. This improves the compatibility of the front hub structure, so that the front hub structure can be adapted to the two commonly used shaft sizes 1, thereby significantly reducing mold costs and warehousing costs, which is beneficial to production and manufacturing.

[0041] In a preferred embodiment, the shaft 1 has a limiting part 11 at one end and is used to connect with a nut at the other end. The female cover 52 is disposed between the bearing 4 and the limiting part 11 or between the bearing 4 and the nut, so that the bearing 4 is axially limited. For example, the limiting part 11 protrudes along the shaft 1, the cross-sectional shape of the shaft 1 is T-shaped, and the other end is provided with a threaded part 12 for connecting with a nut. The nut is locked with the threaded part 12 so that the female covers 52 at both ends are pressed against the bearing 4.

[0042] In another embodiment, the female cover 52 has a limiting groove 522 communicating with the second mounting hole 521 at one end away from the bearing 4, and a boss 512 is provided at one end of the female cover 51 away from the bearing 4. The boss 512 is embedded in the limiting groove 522 and abuts against the limiting part 11 or the nut to limit the female cover 51 axially. During installation, it is only necessary to insert the female cover 51 along the second mounting hole 521 and make the boss 512 abut against the limiting groove 522. The structure is simple and easy to disassemble and assemble.

[0043] Based on the above embodiments, the female cover 52 is provided with a shaft hole 523 that communicates with the second assembly hole 521. The end of the hub spindle 2 is inserted into the shaft hole 523. The female cover 51 is configured to be inserted into the inner hole 21 of the hub spindle 2, so that the length of the female cover 51 can be made longer to ensure the length of the female cover 51 in conjunction with the shaft 1, and to ensure the stability of the transmission.

[0044] Furthermore, the diameters of the second mounting hole 521, the inner hole 21, and the outer diameter of the sub-cover 51 are all equal, so that the shaft 1 can be fitted with both the second mounting hole 521 and the inner hole 21, ensuring the fitting length between the female cover 52 and the shaft 1 and improving coaxiality. Sealing elements 6 are fitted between the sub-cover 51 and the female cover 52, and between the female cover 52 and the hub spindle 2. The sealing element 6 is preferably a sealing ring, ensuring the sealing between the side cover assembly 5 and the hub spindle 2, preventing corrosion inside the front hub structure and extending the lifespan of the front hub structure. In one embodiment, the sub-cover 51 extends out of the outer wall of the inner hole 21 and has a recessed relief groove 513 to prevent adhesion between the outer wall of the sub-cover 51 and the wall of the inner hole 21, reducing assembly resistance and facilitating installation.

[0045] In another embodiment, a positioning part 22 is provided along the outer wall of the hub spindle 2 corresponding to the positions of the two bearings 4. The positioning part 22 abuts against the bearings 4 to limit the hub spindle 2 axially. During installation, the hub spindle 2 is fitted into the hub housing 3, and then the bearings 4 and the side cover assembly 5 are fitted in sequence. Next, the shaft 1 is installed, and the side cover assembly 5 is pressed against the bearings 4 by tightening the lock nut, so that both the hub spindle 2 and the hub housing 3 are axially limited. When replacing the shaft 1, it is only necessary to remove the shaft 1, remove or install the sub-cover 51, and then fit the shaft 1 to be replaced and tighten the lock nut. No major disassembly or replacement is required, and one front hub structure can be compatible with two shafts 1 of different diameters.

[0046] In other embodiments, the end of the female cover 52 near the bearing 4 extends outward to form a stop portion 524 for shielding the bearing 4, and the stop portion 524 has a flat surface for abutting against the connecting member. The stop portion 524 can provide a certain degree of protection for the bearing 4, and at the same time can prevent other connecting members from pressing against the bearing 4 during assembly, thus playing a limiting role.

[0047] The above are merely preferred embodiments of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions that fall within the scope of this utility model's concept are protected by this utility model.

Claims

1. A bicycle front hub structure, characterized in that, The device includes a shaft and a hub spindle and a hub housing, which are sequentially sleeved on the shaft from the inside to the outside. Both ends of the hub housing are equipped with bearings adapted to the hub spindle, and the bearings are configured to be axially limited via side cover assemblies disposed at both ends of the hub housing. The side cover assembly includes a sub-cover and a female cover. The sub-cover has a first mounting hole for fitting with the shaft, and the female cover has a second mounting hole for fitting with the shaft. The sub-cover is detachably fitted into the second mounting hole. The diameter of the second mounting hole is different from that of the first mounting hole, so that the side cover assembly can fit shafts of different diameters.

2. The bicycle front hub structure according to claim 1, characterized in that, The shaft has a limiting part at one end and is used to connect with a nut at the other end. The nut is abutted between the bearing and the limiting part or between the bearing and the nut so that the bearing is axially limited.

3. The bicycle front hub structure according to claim 2, characterized in that, The female cover has a limiting groove at one end away from the bearing that communicates with the second assembly hole, and a boss is provided at one end of the female cover away from the bearing. The boss is embedded in the limiting groove and abuts against the limiting part or nut to limit the female cover axially.

4. The bicycle front hub structure according to any one of claims 1-3, characterized in that, The female cover has a shaft hole that communicates with the second assembly hole, the end of the hub spindle is inserted into the shaft hole, and the female cover is configured to be inserted into the inner hole of the hub spindle.

5. The bicycle front hub structure according to claim 4, characterized in that, The diameter of the second assembly hole, the diameter of the inner hole, and the outer diameter of the sub-cover are all equal. A sealing element is fitted between the sub-cover and the mother cover, and between the mother cover and the hub spindle.

6. The bicycle front hub structure according to claim 5, characterized in that, The sub-cover extends out of the outer wall of the inner hole and is recessed with a relief groove.

7. The bicycle front hub structure according to claim 1, characterized in that, A positioning part is provided along the outer wall of the hub spindle corresponding to the positions of the two bearings. The positioning part abuts against the bearings to limit the axial movement of the hub spindle.

8. The bicycle front hub structure according to claim 1, characterized in that, The end of the female cover near the bearing extends outward to form a stop portion for shielding the bearing, and the stop portion has a flat surface for abutting against the connecting member.

9. The bicycle front hub structure according to claim 1, characterized in that, The diameter of the first assembly hole is 12mm.

10. The bicycle front hub structure according to claim 1, characterized in that, The diameter of the second assembly hole is 15mm.

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