Bicycle hub structure

Abstract

The utility model belongs to the technical field of bicycle parts, and particularly discloses a bicycle hub structure which comprises a hub body, a lining shaft, hexagonal nuts and frame claws, a plurality of bearings are installed in the hub body, the hexagonal nuts are arranged at the two ends of the hub body, connecting grooves are formed in the two ends of the lining shaft, and the frame claws are arranged in the connecting grooves. A connecting groove is formed in the frame body hook claw, internal threads are arranged in the connecting groove, internal teeth are arranged on the inner side of the hexagonal nut, a connecting sleeve is arranged at one end of the hexagonal nut, external teeth matched with the internal threads are arranged on the outer side of the connecting sleeve, a hexagonal groove matched with the hexagonal nut is formed in the frame body hook claw, and the hexagonal nut is sleeved with the hexagonal groove. The frame body hook claw is in threaded connection with the inner teeth of the hexagonal nut through the screw, the lining shaft is installed in the hub body and matched with the bearing, the transmission effect of the hub can be improved, meanwhile, the frame body hook claw is in butt joint with the hexagonal nut through the hexagonal groove and is locked through the screw, later disassembly and assembly are facilitated, and safety is high.

Description

Technical Field

[0001] The utility model relates to the technical field of bicycle parts, in particular to a bicycle hub structure. Background Technique

[0002] A bicycle, also known as a pedal bike or a bicycle, is an important daily means of transportation in life. It is in demand in all fields of society and is an essential means of transportation for social production activities. It is convenient, fast, green and environmentally friendly, and suitable for short trips. The overall strength and performance of a bicycle largely depend on the combined connection strength between the hook of the frame body and the rotating hub. As the core accessories of the entire bicycle, the frame and the hub largely determine, affect the strength, service life and safety of the bicycle, and affect the smoothness and comfort of riding.

[0003] However, the hubs commonly used in current bicycles are a single-piece axle center. In order to ensure the fit with the bearings, complicated processing and grinding processes are adopted. Due to the limitations of the material wall thickness and the turning and grinding processes, expensive materials and a circular cross-section feature have to be used. The connection end surface between the hub and the frame is usually a sleeve and is in face-to-face contact, and a clamping method with a round shaft rod is adopted. This method limits the magnitude of the locking force in terms of both strength and force; thus, the phenomenon of fracture of the hub shaft and the frame hook surface occurs. Safety cannot be guaranteed. Content of the Utility Model

[0004] The purpose of the utility model is to provide a bicycle hub structure to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A bicycle hub structure includes a hub body, a lining shaft, a hexagon nut and a frame body hook. A plurality of bearings are installed inside the hub body, and the lining shaft is arranged inside the hub body. The hexagon nut is arranged at both ends of the hub body. The frame body hook is arranged at the end of the hexagon nut. Connection grooves are opened at both ends of the lining shaft, and internal threads are arranged in the connection grooves. Internal teeth are arranged inside the hexagon nut. A connection sleeve is arranged at one end of the hexagon nut, and external teeth that cooperate with the internal threads are arranged on the outer side of the connection sleeve. The connection sleeve passes through the bearing and is locked together with the lining shaft through the internal threads. A hexagon groove that cooperates with the hexagon nut is arranged on the frame body hook, and the hexagon groove is sleeved on the hexagon nut. The frame body hook is threadedly connected with the internal teeth of the hexagon nut through a screw. By installing the lining shaft inside the hub body and cooperating with the bearing, the transmission effect of the hub can be increased. At the same time, by docking the frame body hook with the hexagon nut through the hexagon groove and using a screw to lock it, it is not only convenient for later disassembly and assembly, but also has high safety.

[0006] Preferably, the outer wall of the lining shaft abuts against the inner ring of the bearing, and its outer diameter shall not be greater than the maximum outer diameter of the inner rings of the bearings at both ends to limit the lining shaft.

[0007] Preferably, the hexagonal groove is recessed by 1-2 mm, and this depth can be adapted to the length of the hexagonal nut.

[0008] Preferably, the connecting sleeve at one end of the hexagonal nut is cylindrical to fit the internal thread of the inner lining shaft thread.

[0009] Preferably, a total of four bearings are provided inside the hub body, two of which are located at both ends of the hub body respectively, and the other two bearings are located near the middle of the hub body.

[0010] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0011] For the present utility model, the connection between the hub body and the shaft adopts the connection method of bearings and the inner lining shaft, effectively increasing the rotation effect and mechanical strength of the hub, and reducing the manufacturing cost and difficulty of the hub shaft; the connection with the hook of the bicycle frame body adopts the locking method of hexagonal butt joint screws; enhancing the safety and service life of the bicycle. Description of the Drawings

[0012] Figure 1 It is a schematic diagram of the split structure of the hook of the frame body of the present utility model;

[0013] Figure 2 It is a schematic diagram of the hub body structure of the present utility model;

[0014] Figure 3 It is a schematic diagram of the inner lining shaft structure of the present utility model;

[0015] Figure 4 It is a schematic diagram of the hexagonal nut structure of the present utility model;

[0016] Figure 5 It is a schematic diagram of the assembly structure of the hub body, the inner lining shaft and the hexagonal nut of the present utility model.

[0017] In the figure: 1. Hub body; 101. Bearing; 2. Inner lining shaft; 201. Internal thread; 3. Hexagonal nut; 3011. External thread; 302. Internal thread; 4. Frame body hook; 401. Hexagonal groove. Detailed Embodiments

[0018] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0019] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "vertical", "upper", "lower", "horizontal", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0020] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0021] Please refer to Figures 1-5 , the present utility model provides a technical solution: a bicycle hub structure, including a hub body 1, a lining shaft 2, a hexagon nut 3 and a frame body claw 4. A plurality of bearings 101 are installed inside the hub body 1, and the lining shaft 2 is arranged inside the hub body 1. The hexagon nut 3 is arranged at both ends of the hub body 1. The frame body claw 4 is arranged at the end of the hexagon nut 3. Connection grooves are opened at both ends of the lining shaft 2, and internal threads 201 are arranged in the connection grooves. Internal teeth 302 are arranged inside the hexagon nut 3. A connection sleeve 301 is arranged at one end of the hexagon nut 3. External teeth 3011 matching the internal threads 201 are arranged on the outer side of the connection sleeve 301. The connection sleeve 301 passes through the bearing 101 and is locked with the lining shaft 2 through the internal threads 201. A hexagon groove 401 matching the hexagon nut 3 is arranged on the frame body claw 4. The hexagon groove 401 is sleeved on the hexagon nut 3. The frame body claw 4 is threadedly connected with the internal teeth 302 of the hexagon nut 3 through screws. By installing the lining shaft 2 inside the hub body 1 and cooperating with the bearings 101, the transmission effect of the hub can be increased. At the same time, the frame body claw 4 is docked with the hexagon nut 3 by using the hexagon groove and locked with screws, which is not only convenient for later disassembly and assembly, but also has high safety.

[0022] Further, the outer side wall of the lining shaft 2 abuts against the inner ring of the bearing 101, and its outer diameter shall not be greater than the maximum outer diameter of the inner rings of the bearings 101 at both ends, so as to limit the lining shaft 2.

[0023] Further, the hexagon groove 401 is recessed by 1-2 mm, and this depth can be adapted to the length of the hexagon nut 3.

[0024] Furthermore, the connecting sleeve 301 at one end of the hexagonal nut 3 is cylindrical to match the internal thread 201 of the thread of the liner shaft 2.

[0025] Furthermore, there are four bearings 101 in total inside the hub body 1 , two of which are located at two ends of the hub body 1 , and the other two bearings 101 are located near the middle of the hub body 1 .

[0026] In summary, the bicycle hub frame is provided with a plurality of bearings 101 inside the hub body 1, and the bearings 101 are matched with the liner shaft 2, and the connecting sleeve 301 at the cylindrical end of the hexagonal nut 3 is passed through the bearings 101 at both ends of the hub body 1, and screwed into the internal thread 201 of the liner shaft 2 through the external thread 3011, so that the liner shaft 2 is connected with the bearing 101 of the hub body 1, which effectively increases the rotation effect and mechanical strength of the hub, and reduces the manufacturing cost and difficulty of the hub shaft. The hexagonal groove 401 of the frame body hook 4 can be sleeved on the hexagonal nut 3, and then the matching screw passes through the frame body hook 4 and screws into the internal thread 302 on the hexagonal nut 3, so that the frame body hook 4 can be connected with the hub body 1, and the hexagonal butt screw locking method is adopted; the safety and service life of the bicycle are enhanced.

[0027] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A bicycle hub structure, characterized in that: The invention comprises a hub body (1), an inner liner shaft (2), a hexagonal nut (3) and a frame body hook (4), wherein a plurality of bearings (101) are installed inside the hub body (1), and the inner liner shaft (2) is arranged inside the hub body (1), the hexagonal nut (3) is arranged at both ends of the hub body (1), and the frame body hook (4) is arranged at the end of the hexagonal nut (3), the inner liner shaft (2) is provided with a connecting groove at both ends, the connecting groove is provided with an internal thread (201), the inner side of the hexagonal nut (3) is provided with an internal thread (302), and the hexagonal A connecting sleeve (301) is provided at one end of the nut (3), and an outer side of the connecting sleeve (301) is provided with an outer thread (3011) that matches the inner thread (201). The connecting sleeve (301) passes through the bearing (101) and is locked together with the liner shaft (2) through the inner thread (201). A hexagonal groove (401) that matches the hexagonal nut (3) is provided on the frame hook (4), and the hexagonal groove (401) is sleeved on the hexagonal nut (3). The frame hook (4) is threadedly connected with the inner thread (302) of the hexagonal nut (3) through a screw.

2. A bicycle hub structure according to claim 1, characterized in that: The outer wall of the liner shaft (2) presses against the inner ring of the bearing (101).

3. The bicycle hub structure according to claim 1, characterized in that: The hexagonal groove is sunken by 1-2 mm.

4. The bicycle hub structure according to claim 1, characterized in that: The connecting sleeve (301) at one end of the hexagonal nut (3) is cylindrical.

5. The bicycle hub structure according to claim 1, characterized in that: A total of four bearings (101) are provided inside the hub body (1), two of which are located at two ends of the hub body (1), and the other two bearings (101) are located near the middle of the hub body (1).

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