Bicycle brake hub

Abstract

The utility model provides a bicycle brake hub which comprises a hub shell, two spoke connecting seats and a rotating shaft, the two spoke connecting seats are symmetrically fixed to the two ends of the hub shell, a plurality of spoke mounting holes are formed in the spoke connecting seats, the rotating shaft is arranged in the hub shell in a penetrating mode, and the spoke mounting holes are formed in the rotating shaft. The hub is characterized in that two bearings are arranged on the rotating shaft, the two ends of the rotating shaft are symmetrically sleeved with the bearings, and the bearings are arranged in the hub shell; an oil injection hole is formed in the bearing, a lubricating device is arranged outside the bearing, the lubricating device comprises an oil injection pipe and a plug cap, the oil injection pipe is arranged in the oil injection hole in a penetrating mode and communicated with the interior of the bearing, the plug cap is fixed in the upper end of the oil injection hole, and a sealing ring is arranged at the joint of the oil injection pipe and the oil injection hole. Due to the arrangement of the lubricating device, the hub does not need to be disassembled regularly for manual lubricating oil smearing, the maintenance process is simplified, and the labor intensity is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of brake hubs, in particular to a bicycle brake hub. Background Art

[0002] The hub, commonly known as the "hub barrel", is a structural component connecting the spokes outside the shaft, usually also called the hub of the axle skin. The hub is an essential part of a bicycle, mainly the part for wheel axle positioning and driving the rotation of the wheel rim. There are various types of bicycle hubs in the market, with different classification methods. By material, there are iron, aluminum, titanium, carbon fiber, etc. By spoke installation, there are straight-pull hubs and elbow hubs. By structure, there are thru-axles and quick releases, etc.;

[0003] The existing Chinese patent document CN202022784352.4, a bicycle hub with a sealing device, includes a rotating shaft, a drum disc, a bicycle hub main body, a sealing shaft sleeve, a mechanical seal ring, a wear-resistant backing plate, a sealing baffle plate, ball bearings, a positioning clamping plate, a sealing groove, and a sealing disc. The rotating shaft is installed inside the bicycle hub main body, the drum disc is installed on the annular side of the bicycle hub main body, the sealing shaft sleeve is sleeved on the annular side of the rotating shaft, the positioning clamping plate is installed on the right side of the inner annular side of the sealing shaft sleeve, the sealing baffle plate is arranged on the left side of the clamping plate, ball bearings are installed between the sealing baffle plate and the positioning clamping plate, the mechanical seal ring is installed inside the sealing shaft sleeve, the wear-resistant backing plate is installed at the connection between the mechanical seal ring and the left end face of the bicycle hub main body, and the sealing disc is installed on the annular side of the rotating shaft. This design solves the problem of poor sealing of the original bicycle hub. The utility model has a reasonable structure, is convenient for sealing the bicycle hub, and has a good sealing effect.

[0004] However, the above patent has certain defects in use. After long-term use, the bearing and the rotating shaft need lubrication, and the hub of this device needs to be disassembled as a whole to maintain and lubricate its interior, which is very cumbersome and greatly increases the labor intensity.

[0005] Therefore, a bicycle brake hub is proposed here to solve the above problems. Summary of the Utility Model

[0006] In order to overcome the deficiencies of the prior art, the utility model provides a bicycle brake hub.

[0007] The utility model is realized by adopting the following technical solutions:

[0008] A bicycle brake hub includes a hub shell, spoke connection seats, and a rotating shaft. There are two spoke connection seats, symmetrically fixed at both ends of the hub shell. The spoke connection seats are provided with a plurality of spoke mounting holes. The rotating shaft passes through the inside of the hub shell. There are two bearings on the rotating shaft, symmetrically sleeved at both ends of the rotating shaft, and the bearings are arranged inside the hub shell;

[0009] An oil injection hole is provided on the bearing, and a lubrication device is provided outside the bearing. The lubrication device includes an oil injection pipe and a plug cap. The oil injection pipe is inserted into the oil injection hole and is connected to the inside of the bearing. The plug cap is fixed inside the upper end of the oil injection hole. A sealing ring is provided at the connection between the oil injection pipe and the oil injection hole, and a sealing groove for installing the sealing ring is provided on the inner wall of the oil injection hole.

[0010] Towers are respectively provided on the sides of the spoke mounting base. A plurality of mounting bumps are provided on the towers, and internal threads are provided in the mounting bumps.

[0011] A copper sleeve is provided between the bearing and the hub shell, and the copper sleeve is sleeved on the outer ring of the bearing.

[0012] Sealing retaining rings are respectively provided on the outer sides of the bearings. The sealing retaining rings are sleeved on the rotating shaft. The outer peripheral wall of the sealing retaining ring abuts against the inner wall of the tower, and the side wall of the sealing retaining ring abuts against the side wall of the bearing.

[0013] External threads are provided at the left and right ends of the rotating shaft. Pressing blocks are symmetrically provided at the left and right ends of the rotating shaft. The pressing blocks are threadedly connected to the rotating shaft, and a plurality of protrusions are provided on the outer peripheral wall of the pressing blocks.

[0014] The utility model has the following beneficial effects compared with the prior art:

[0015] 1. By providing a lubrication device, when it is necessary to lubricate the bearing, only need to inject lubricating oil from the oil injection pipe in the lubrication device, and the lubricating oil can be injected into the inside of the bearing through the oil injection pipe. The built-in lubrication device realizes the automatic lubrication of the bearing, eliminates the need to regularly disassemble the hub for manual lubricant application, simplifies the maintenance process, and greatly reduces the labor intensity.

[0016] 2. Through designs such as sealing rings and sealing retaining rings, it effectively prevents the leakage of lubricating oil and the entry of external impurities into the inside of the bearing, improves the sealing performance of the hub, and due to the lubrication device, the bearing is continuously and effectively lubricated, reducing wear and extending the service life of the hub. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a three-dimensional structural schematic diagram of the whole utility model;

[0018] Figure 2 is an exploded three-dimensional structural schematic diagram of the utility model;

[0019] Figure 3 is a three-dimensional structural schematic diagram of the lubrication device of the utility model;

[0020] In the figure: 1. Rotating shaft; 11. External thread; 2. Pressing block; 21. Protrusion; 3. Sealing retaining ring; 4. Tower base; 41. Mounting lug; 5. Lubricating device; 51. Plug cap; 52. Oil injection pipe; 53. Sealing ring; 6. Hub shell; 7. Spoke connection seat; 71. Spoke mounting hole; 8. Bearing; 81. Oil injection hole; 9. Copper bushing. Detailed implementation mode

[0021] Next, in combination with the attached drawings and the detailed implementation mode, the present utility model will be further described. It should be noted that on the premise of no conflict, the following described embodiments or technical features can be arbitrarily combined to form new embodiments.

[0022] The present utility model will be further described below in conjunction with the attached drawings.

[0023] As Figures 1 to 3 shown, a bicycle brake hub includes a hub shell 6, a spoke connection seat 7 and a rotating shaft 1. There are two spoke connection seats 7, which are symmetrically fixed at both ends of the hub shell 6. The spoke connection seat 7 is provided with a plurality of spoke mounting holes 71. The spoke connection seat 7 is a connecting component between the hub shell 6 and the spokes, responsible for fixing the spokes on the hub. It is connected to the spokes through a plurality of spoke mounting holes 71 to form a support structure for the wheel.

[0024] The rotating shaft 1 is arranged inside the hub shell 6. The wheel and the tire are connected to the hub through the axle to realize the rotation of the wheel. There are two bearings 8 on the rotating shaft 1. The bearings 8 are symmetrically sleeved at both ends of the rotating shaft 1. The bearings 8 are arranged inside the hub shell 6.

[0025] The bearing 8 is provided with an oil injection hole 81. An oil injection hole 81 is provided on the bearing 8. A lubricating device 5 is arranged outside the bearing 8. The lubricating device 5 includes an oil injection pipe 52 and a plug cap 51. The oil injection pipe 52 is arranged in the oil injection hole 81 and is communicated with the inside of the bearing 8 to ensure that the lubricating oil can directly reach the inside of the bearing 8. The plug cap 51 is fixed inside the upper end of the oil injection hole 81. The plug cap 51 is used to seal the oil injection hole 81 to prevent the lubricating oil from leaking. A sealing ring 53 is arranged at the connection between the oil injection pipe 52 and the oil injection hole 81. A sealing groove for installing the sealing ring 53 is arranged on the inner wall of the oil injection hole 81. The cooperation of the sealing ring 53 and the sealing groove further enhances the sealing effect. By injecting lubricating oil into the bearing 8 through the lubricating device 5, the rider or maintenance personnel can regularly or as needed open the plug cap 51 and add an appropriate amount of lubricating oil to the inside of the bearing 8 through the oil injection pipe 52. The lubricating oil forms an oil film inside the bearing 8, reducing the friction and wear between the balls or rollers, improving the service life and rotation efficiency of the bearing 8, and greatly reducing the intensity without disassembling the entire device.

[0026] Tower bases 4 are respectively provided on the sides of the spoke mounting bases. A plurality of mounting bumps 41 are provided on the tower bases 4, and internal threads are provided in the mounting bumps 41. The tower bases can be used to mount other devices, such as disc brakes or other gear shifting components, enhancing the practicality of the device.

[0027] A copper sleeve 9 is provided between the bearing 8 and the hub shell 6. The copper sleeve 9 is sleeved on the outer ring of the bearing 8 to reduce the friction between the bearing 8 and the hub shell 6, improve wear resistance, and extend the service life of the bearing 8.

[0028] Sealing retaining rings 3 are respectively provided on the outer sides of the bearings 8. The sealing retaining rings 3 are sleeved on the rotating shaft 1. The outer peripheral wall of the sealing retaining ring 3 abuts against the inner wall of the tower base 4, and the side wall of the sealing retaining ring 3 abuts against the side wall of the bearing 8 to form an effective sealing structure to prevent external impurities from entering the interior of the bearing 8.

[0029] External threads 11 are provided at the left and right ends of the rotating shaft 1. Pressing blocks 2 are symmetrically provided at the left and right ends of the rotating shaft 1. The pressing blocks 2 are threadedly connected to the rotating shaft 1, and a plurality of protrusions 21 are provided on the outer peripheral wall of the pressing blocks 2.

[0030] The above embodiments are only the preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by those skilled in the art on the basis of the present invention fall within the scope of protection required by the present invention.

Claims

1. A bicycle brake hub, comprising a hub shell (6), spoke connection seats (7) and a rotating shaft (1). There are two spoke connection seats (7), which are symmetrically fixed at both ends of the hub shell (6). A plurality of spoke mounting holes (71) are provided on the spoke connection seats (7). The rotating shaft (1) is arranged inside the hub shell (6), and is characterized in that: There are two bearings (8) provided on the rotating shaft (1). The bearings (8) are symmetrically sleeved at both ends of the rotating shaft (1), and the bearings (8) are arranged inside the hub shell (6). There is an oil injection hole (81) provided on the bearing (8). There is a lubrication device (5) provided outside the bearing (8). The lubrication device (5) includes an oil injection pipe (52) and a plug cap (51). The oil injection pipe (52) is inserted into the oil injection hole (81) and is connected to the inside of the bearing (8). The plug cap (51) is fixed inside the upper end of the oil injection hole (81). A sealing ring (53) is provided at the connection between the oil injection pipe (52) and the oil injection hole (81). A sealing groove for installing the sealing ring (53) is provided on the inner wall of the oil injection hole (81).

2. The bicycle brake hub according to claim 1, wherein: There are freewheels (4) respectively provided on the sides of the spoke mounting seats. There are multiple mounting protrusions (41) provided on the freewheels (4), and internal threads are provided inside the mounting protrusions (41).

3. A bicycle brake hub according to claim 2, wherein: There is a copper sleeve (9) provided between the bearing (8) and the hub shell (6), and the copper sleeve (9) is sleeved on the outer ring of the bearing (8).

4. A bicycle brake hub according to claim 3, characterized in that: There are sealing retaining rings (3) respectively provided on the outer sides of the bearings (8). The sealing retaining rings (3) are sleeved on the rotating shaft (1). The outer peripheral wall of the sealing retaining ring (3) abuts against the inner wall of the freewheel (4), and the side wall of the sealing retaining ring (3) abuts against the side wall of the bearing (8).

5. A bicycle brake hub according to claim 4, wherein: External threads (11) are provided at the left and right ends of the rotating shaft (1). Compression blocks (2) are symmetrically provided at the left and right ends of the rotating shaft (1). The compression blocks (2) are threadedly connected to the rotating shaft (1), and multiple protrusions (21) are provided on the outer peripheral wall of the compression blocks (2).

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