Anti-rust bicycle middle shaft transmission structure

Abstract

The utility model discloses a bicycle middle shaft transmission structure of preventing heterophonic, relates to bicycle middle shaft technical field, including axle, axle sleeve, the bearing unit of symmetry sleeve connection in axle two ends, ball, rotation bolt and prevention unit, and axle two ends pass through bolt fixed. Prevention unit contains sealing assembly and lubricating assembly, and sealing assembly has 16 arc flexible isolating sheet, and closely fits axle and can realize self -cleaning and dustproof with unit rotation, and the annular storehouse of lubricating assembly is built -in the spherical lubricating microparticle containing lubricating oil, and rotation prevention unit can make the microparticle slip, and the oil lubrication of broken release is through ball friction. The structure need not to disassemble and can lubricate, can isolate dirt, reduce abrasion, simplify maintenance and improve transmission stability, effectively avoid heterophonic.

Description

Technical Field

[0001] This utility model relates to the field of bicycle bottom bracket technology, and in particular to a bicycle bottom bracket transmission structure for preventing abnormal noise. Background Technology

[0002] The bicycle bottom bracket, as the core transmission component connecting the crank and frame and transmitting pedaling power, directly determines the riding experience and transmission efficiency through its operational stability. However, existing structures are prone to generating abnormal noises and are inconvenient to maintain due to multiple defects. Specifically: lubrication and maintenance are cumbersome; traditional structures require disassembling components such as the crank and bottom bracket body to replenish lubricant to parts like the ball bearings and axle, often leading to dry friction noise due to delayed maintenance; weak sealing protection; a single sealing ring is insufficient to prevent dust, dirt, and rainwater from entering, and dirt adhering to mating surfaces accelerates wear and corrosion of components, resulting in persistent abnormal noises; furthermore, the lack of self-cleaning and adaptive compensation designs allows impurities to accumulate, worsening the transmission environment, and long-term wear and tear can cause loosening, leading to vibration noises. These problems not only seriously affect riding comfort but also shorten the lifespan of the bottom bracket, necessitating a new noise-resistant structure to address these pain points. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a bicycle bottom bracket transmission structure that prevents abnormal noise, solving the problem that existing bottom brackets are prone to making abnormal noise due to wear and dirt intrusion.

[0004] To achieve the above objectives, this utility model provides the following technical solution: A bicycle bottom bracket transmission structure for preventing abnormal noise includes a shaft, a bushing on the outer ring of the shaft, and receiving units symmetrically sleeved at both ends of the shaft. A ball bearing is provided on the inner ring of each receiving unit, and a rotating bolt is sleeved around the ball bearing. A prevention unit is provided outside the rotating bolt. The shaft passes through the receiving unit, the ball bearing, the rotating bolt, and the prevention unit. A second bolt and a first bolt are spirally sleeved at the outermost ends of both ends of the shaft. The prevention unit is equipped with sixteen isolation plates arranged in a ring. The cross-section of each isolation plate is arc-shaped and the isolation plate is made of flexible material. The prevention unit is provided with a sliding step, which is in the shape of a ring. One end of the receiving unit is provided with a slide rail, and the sliding step is adapted to the slide rail, and the sliding step can slide within the slide rail.

[0005] Preferably, the prevention unit includes a sealing component and a lubrication component, one side of the lubrication component being fixedly connected to the inner surface of the lubrication component.

[0006] Preferably, the sealing assembly further includes an isolation ring, which is formed by a ring-shaped curved surface and a circular plate with a central hole.

[0007] Preferably, the lubrication assembly includes a storage tube, which is annular in shape. An annular chamber is provided inside the annular structure of the storage tube. The annular chamber is in the shape of a ring. The storage tube is also provided with a sliding opening, which is a circular hole.

[0008] Preferably, the receiving unit is further provided with a safety base, which is formed by a ring structure and a circular plate with a through hole in the center. The diameter of the circular plate at the bottom of the receiving unit is larger than the diameter of the circle formed by the balls.

[0009] Preferably, one end of the annular structure formed by the sixteen isolation plates is tightly fitted to the edge of the axis.

[0010] Preferably, the annular chamber contains lubricating microparticles, which are spherical in shape and contain lubricating oil.

[0011] Compared with the prior art, the present invention has the following beneficial effects: The annular chamber of the lubrication assembly stores spherical lubricating particles containing lubricating oil. Rotating the prevention unit allows the lubricating particles to slide down through the sliding port to the ball bearings. The rotation of the ball bearings breaks up the particles and releases the lubricating oil. This lubrication of the core transmission components can be completed without disassembling the central shaft, reducing abnormal noises caused by mechanical wear at the source.

[0012] The annular chamber of the lubrication assembly stores spherical lubricating particles containing lubricating oil. Rotating the prevention unit allows the lubricating particles to slide down through the sliding port to the ball bearings. The rotation of the ball bearings breaks up the particles and releases the lubricating oil. This lubrication of the core transmission components can be completed without disassembling the central shaft, reducing abnormal noises caused by mechanical wear at the source.

[0013] When the prevention unit is rotated, the ring-shaped isolation plates move in a circular motion, which can self-clean the tightly fitted shaft surface, remove the attached dust and impurities, reduce abnormal noise caused by friction of impurities, and maintain the fitting accuracy of the shaft and other components.

[0014] The preventive unit is adapted to the slide rail of the receiving unit through a sliding step, and can be easily rotated to achieve lubrication and cleaning; when replenishing lubricating particles, simply remove the bolts to take out the preventive unit, and add them through the sliding port, without disassembling the entire central shaft drive structure, simplifying the maintenance process.

[0015] The safety base of the receiving unit has a diameter larger than the circle formed by the balls, which can effectively support and protect the core rotating components such as the balls, preventing the components from falling off or shifting; at the same time, the receiving units and fixing bolts are symmetrically arranged at both ends of the shaft to ensure balanced force and reduce abnormal noise caused by structural loosening. Attached Figure Description

[0016] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is an exploded structural diagram of the present invention; Figure 3 This is a schematic diagram of the receiving unit in this utility model; Figure 4 This is a schematic diagram of the slide rail in this utility model; Figure 5 This is a schematic diagram of the prevention unit in this utility model; Figure 6 This is a schematic diagram of the lubrication component in this utility model; Figure 7 This is a cross-sectional schematic diagram of the lubrication component in this utility model; Figure 8 This is a horizontal schematic diagram of the sealing assembly in this utility model; Figure 9 This is a side view of the sealing assembly in this utility model; Figure 10 This is a schematic diagram of the movement of lubricating microparticles in this utility model.

[0018] Legend: 1. First bolt; 2. Second bolt; 3. Prevention unit; 31. Sealing assembly; 311. Isolation plate; 312. Isolation ring; 313. Sliding step; 32. Lubrication assembly; 321. Storage tube; 322. Annular chamber; 323. Sliding port; 4. Rotating bolt; 5. Ball bearing; 6. Receiving unit; 61. Safety base; 62. Through hole; 63. Slide rail; 7. Shaft; 8. Bushing; 001. Lubricating microparticles. Detailed Implementation

[0019] This application provides a bicycle bottom bracket transmission structure that prevents abnormal noise, effectively solving the problem that existing bottom brackets are prone to making abnormal noise due to wear and dirt intrusion. Example

[0020] like Figure 1 - Figure 10As shown, the technical solution in this application embodiment effectively solves the technical problem that existing central shafts are prone to abnormal noise due to wear and dirt intrusion. The overall idea is as follows: To address the problems existing in the prior art, this utility model provides a bicycle bottom bracket transmission structure for preventing abnormal noise, including: A shaft 7 has a bushing 8 on its outer ring. Receiving units 6 are symmetrically fitted at both ends of the shaft 7. Ball bearings 5 ​​are provided on the inner ring of each receiving unit 6. Rotating bolts 4 are fitted around the ball bearings 5. A prevention unit 3 is provided outside the rotating bolts 4. The shaft 7 passes through the receiving units 6, the ball bearings 5, the rotating bolts 4, and the prevention unit 3. A second bolt 2 and a first bolt 1 are spirally fitted at the outermost ends of both ends of the shaft 7. The prevention unit 3 is provided with an isolation plate 311. There are sixteen isolation plates 311 in total. The sixteen isolation plates 311 are arranged in a ring. The cross-section of the isolation plate 311 is arc-shaped. The isolation plate 311 is made of flexible material. The prevention unit 3 is provided with a sliding step 313, which is in the shape of a ring. One end of the receiving unit 6 is provided with a slide rail 63, and the sliding step 313 is adapted to the slide rail 63, and the sliding step 313 can slide within the slide rail 63.

[0021] Furthermore, the prevention unit 3 includes a sealing component 31 and a lubrication component 32, one side of the lubrication component 32 being fixedly connected to the inner surface of the lubrication component 32.

[0022] Furthermore, the sealing assembly 31 also includes an isolation ring 312, which is formed by a ring-shaped curved surface and a circular plate with a central hole.

[0023] Furthermore, the lubrication assembly 32 includes a storage tube 321, which is annular in shape. An annular chamber 322 is provided inside the annular structure of the storage tube 321. The annular chamber 322 is in the shape of a ring. The storage tube 321 is also provided with a sliding opening 323, which is a circular hole.

[0024] Furthermore, the receiving unit 6 is also provided with a safety base 61, which is formed by a ring structure and a circular plate with a through hole 62 in the center. The diameter of the circular plate at the bottom of the receiving unit 6 is larger than the diameter of the circle formed by the balls 5.

[0025] Furthermore, one end of the annular structure formed by the sixteen isolation plates 311 is tightly fitted to the edge of the axis 7.

[0026] Furthermore, the annular chamber 322 is provided with lubricating microparticles 001, which are spherical in shape and contain lubricating oil.

[0027] in: Prevention unit 3: Composed of sealing component 31 and lubrication component 32, it is adapted to the slide rail 63 of receiving unit 6 through sliding step 313, and can rotate along the circumference of the slide rail to realize the linkage function of self-cleaning, dust prevention and automatic lubrication. Isolation plate 311: Made of flexible materials such as nitrile rubber and silicone, sixteen of them are distributed in a ring inside the prevention unit 3. One end is tightly attached to the edge of the shaft 7. When the prevention unit 3 rotates, it rubs against the surface of the shaft, carrying away dust and impurities, and at the same time forming a ring barrier to prevent dirt from entering the bushing 8. Isolation ring 312: Made of aluminum alloy, it is connected to other parts of the sealing assembly 31 and works with the isolation plate 311 to enhance the sealing effect and further prevent rainwater and dust from entering the core transmission area; Sliding step 313: Made of wear-resistant nylon or brass, it is arranged in a ring shape inside the prevention unit 3 and is adapted to the slide rail 63 of the receiving unit 6. It can slide in the slide rail and drive the prevention unit 3 to move in a circular motion, providing power for the release of lubricating particles and the cleaning of the isolation plate. Storage tube 321: Made of aluminum alloy, it is circular in shape and has an annular compartment 322 inside. It is fixedly connected to the inner surface of the lubrication component 32. Lubricating particles 001 are replenished through the sliding port 323 to continuously provide a lubrication source for components such as ball bearings 5. Circular compartment 322: It is a hollow structure integrally formed by storage tube 321 and is connected to sliding port 323. It stores lubricating microparticles 001 inside. When the prevention unit 3 rotates, the microparticles slide down through the sliding port to the ball bearing by gravity to achieve lubrication replenishment. Slide opening 323: It is composed of a circular hole structure opened in the storage tube 321 and is connected to the annular chamber 322. It is both the inlet for replenishing lubricating particles 001 and the outlet for the particles to slide down to the transmission component, thus realizing the storage and release of lubricating materials in a coordinated manner. Lubricating microparticles 001: Composed of a polyalginate composite shell encapsulating lubricating oil, they are spherically stored in the annular chamber 322. They slide down through the sliding port 323 to the ball bearing 5, where they are broken by friction and release the lubricating oil to lubricate the mating surfaces of the ball bearing, shaft, and rotating bolt.

[0028] Working principle: Traditional bottom brackets produce abnormal noises after mechanical wear. In this case, it is necessary to disassemble the structure and apply lubricant to the bottom bracket with a brush to lubricate the mechanical parts, or remove the bicycle seat and pour lubricant from the top to achieve lubrication. The lubricating microparticles 001 provided in this utility model can lubricate the bottom bracket as it rotates, preventing wear between mechanical structures from daily maintenance and avoiding abnormal noises caused by mechanical wear. At the same time, by setting up the isolation plate 311, it prevents dust and rainwater from corroding the internal structure of the bottom bracket during bicycle riding, thus extending the service life of the bottom bracket.

[0029] First, rotate the first bolt 1 to remove it from the shaft 7. Normally, the crank is installed between the first bolt 1 and the second bolt 2. Remove the crank between the first bolt 1 and the second bolt 2, then unscrew the second bolt 2 and remove the prevention unit 3 from the shaft 7. After removing the prevention unit 3, insert several prepared lubricating microparticles 001 into the annular chamber 322 through the sliding opening 323 inside the lubrication assembly 32. Once full, reinsert the prevention unit 3 into one end of the bushing 8.

[0030] The second step involves adapting the sliding step 313 to the slide rail 63 by setting a sliding step 313. When the sliding step 313 rotates, the entire device's prevention unit 3 will move in a circular motion along the adapted slide rail 63. After riding for a period of time, the user can directly touch the surface of the prevention unit 3 with their fingers and rotate the prevention unit 3 in a circular motion along the slide rail 63. When the prevention unit 3 moves in a circular motion, the sealing component 31 and the lubrication component 32 inside the prevention unit 3 also move in a circular motion. The lubrication component 32 has a sliding opening 323, which moves in a circular motion along with the lubrication component 323.

[0031] In the third step, when the sliding opening 323 in the second step performs circular motion, the lubricating microparticles 001 set in the annular chamber 322 will slide out from the sliding opening 323 when the sliding opening 323 rotates to the top due to gravity. The lubricating microparticles 001 will come into contact with the ball bearing 5. When the rider continues to ride, the ball bearing 5 will rotate during the ride. When the ball bearing 5 rotates, it will rub against the lubricating microparticles 001 that have fallen onto it, thereby breaking the outer shell of the lubricating microparticles 001. After the outer shell of the lubricating microparticles 001 is broken, the lubricating oil inside the lubricating microparticles 001 is squeezed out, lubricating the ball bearing 5 and other mechanical structures.

[0032] Fourthly, when the rider rotates the prevention unit 3, it also causes the isolation plate 311 inside the prevention unit 3 to rotate. Through the rotation of the isolation plate 311, the shaft 7, which is in close contact with the isolation plate 311, performs self-cleaning under the rotation of the annularly distributed shaft 7, removing some of the dust on the shaft 7. At the same time, due to the curved surface design of the isolation plate 311, when the usage occurs in a muddy and dusty environment, the curved surface design of the isolation plate 311 can play an isolation role, preventing dust, mud and other dirt from entering the bushing 8 and corroding its internal mechanical structure, causing abnormal noise from the bottom bracket. Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A bicycle bottom bracket transmission structure for preventing abnormal noise, characterized in that, Includes a shaft (7), the outer ring of which is provided with a bushing (8), and the two ends of the shaft (7) are respectively symmetrically sleeved with receiving units (6). The inner ring of the receiving unit (6) is provided with a ball (5), the ball (5) is sleeved with a rotating bolt (4), and the outside of the rotating bolt (4) is provided with a prevention unit (3). The shaft (7) passes through the receiving unit (6), the ball (5), the rotating bolt (4) and the prevention unit (3). The outermost ends of the shaft (7) are spirally sleeved with a second bolt (2) and a first bolt (1). The prevention unit (3) is provided with an isolation plate (311), and there are a total of sixteen isolation plates (311). The sixteen isolation plates (311) are arranged in a ring. The cross section of the isolation plate (311) is arc-shaped and the isolation plate (311) is made of flexible material. The prevention unit (3) is provided with a sliding step (313), which is in the shape of a ring; One end of the receiving unit (6) is provided with a slide rail (63), the sliding step (313) is adapted to the slide rail (63), and the sliding step (313) can slide within the slide rail (63).

2. The bicycle bottom bracket transmission structure for preventing abnormal noise as described in claim 1, characterized in that, The prevention unit (3) includes a sealing component (31) and a lubrication component (32), one side of the lubrication component (32) being fixedly connected to the inner surface of the lubrication component (32).

3. The bicycle bottom bracket transmission structure for preventing abnormal noise as described in claim 2, characterized in that, The sealing assembly (31) also includes an isolation ring (312), which is formed by a ring-shaped surface and a circular plate with a central hole.

4. The bicycle bottom bracket transmission structure for preventing abnormal noise as described in claim 2, characterized in that, The lubrication assembly (32) includes a storage tube (321), which is annular. The storage tube (321) has an annular compartment (322) inside its annular structure. The annular compartment (322) is annular. The storage tube (321) also has a sliding port (323), which is a circular hole.

5. The bicycle bottom bracket transmission structure for preventing abnormal noise as described in claim 1, characterized in that, The receiving unit (6) is also provided with a safety base (61). The safety base (61) is formed by a ring structure and a circular plate with a through hole (62) in the center. The diameter of the circular plate at the bottom of the receiving unit (6) is larger than the diameter of the circle formed by the ball (5).

6. The bicycle bottom bracket transmission structure for preventing abnormal noise as described in claim 1, characterized in that... One end of the annular structure formed by the sixteen isolation plates (311) is closely attached to the edge of the axis (7).

7. The bicycle bottom bracket transmission structure for preventing abnormal noise as described in claim 4, characterized in that... , The annular chamber (322) is provided with lubricating microparticles (001), which are spherical in shape and contain lubricating oil.

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