Novel waterproof assembly for middle axle of bicycle
By setting up waterproof components on the bicycle central shaft, the clearance between the central shaft bowl and the sleeve, side cover and the shaft core and bearing is sealed with waterproof parts, the problem of moisture entering the central shaft during rainy days or cleaning is solved, and the lubrication and service life of the central shaft are achieved.
Patent Information
- Application Number
- CN202422398733.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-30
- Publication Date
- 2025-07-01
- Estimated Expiration
- 2034-09-30
AI Technical Summary
The central axle of the existing bicycle is prone to moisture in rainy days or when cleaned, affecting lubrication and rust, resulting in abnormal cycling noises.
Waterproof components are provided on the bicycle central shaft, including the central shaft bowl, side cover and bearing. A rubber waterproof piece is used to form a seal between the central shaft bowl and the sleeve, the side cover and the shaft core, the bearing and the side cover to prevent water and dust from entering.
Effectively prevent water and dust from entering the interior of the central axis, maintain lubrication, extend the service life of the central axis, and improve the riding experience.
Smart Images
Figure CN223049255U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of bicycle accessories, in particular to a novel waterproof component used on a bicycle center shaft. Background Art
[0002] A bicycle, also known as a bike or a bicycle, is a green and environmentally friendly means of transportation in which people use pedals to drive the wheels. It is mainly composed of a body part, a transmission part, a moving part and a safety device. Among the various parts of a bicycle, in addition to some small bearings, there are mainly three major bearings, namely the front axle, the middle axle and the rear axle. The front and rear axles only need to withstand bending moments and do not rotate, and are fixed axles. The middle axle withstands both bending moments and torques, and is a rotating axle. The middle axle is the axis used to connect the pedals through the crank. Therefore, the quality of the middle axle will affect the driver's pedaling experience.
[0003] Although the commonly used middle shaft has certain waterproof and dustproof properties during use, water stains will still enter the shaft body when riding on rainy days or washing and cleaning the vehicle, which will affect the internal lubrication and rust, causing abnormal noise when riding. Therefore, the existing technology has limitations. Utility Model Content
[0004] The utility model is developed to solve the above problems and aims to provide a new waterproof component for a bicycle center shaft.
[0005] The utility model provides a novel waterproof component for a bicycle middle shaft, which is arranged on the middle shaft and located at the connection between the middle shaft and the crank. The middle shaft comprises a shaft core and a shaft sleeve arranged on the shaft core. The length of the shaft sleeve is less than the length of the shaft core. The utility model has the following characteristics, including:
[0006] The middle shaft bowl is sleeved on the middle shaft. The middle shaft bowl is in the shape of a hollow stepped shaft and has a small diameter section and a large diameter section. At least a part of the small diameter section fits the outer wall of the shaft sleeve, and a first waterproof member is provided between the small diameter section and the shaft sleeve. The diameter of the large diameter section is larger than the diameter of the shaft core and is located above the shaft core.
[0007] The side cover is sleeved on the middle shaft and located between the large diameter section of the middle shaft bowl and the shaft core. The inner wall of the side cover fits the outer wall of the shaft core, and a groove is provided on the inner wall of the side cover. A second waterproof member is provided in the groove. The side cover is in the shape of a T-shaped hollow shaft and has a vertical section and a horizontal section. The size of the vertical section is not greater than the size between the large diameter section and the shaft core, and the vertical section is against the crank.
[0008] The bearing is arranged between the large diameter section of the middle shaft bowl and the horizontal section of the side cover, and a third waterproof part is arranged between the side end surface of the bearing and the vertical section of the side cover.
[0009] The novel waterproof component for the bicycle center shaft provided by the utility model can also have the following characteristics: the first waterproof component, the second waterproof component, and the third waterproof component are all waterproof components made of rubber material.
[0010] The novel waterproof component for the bicycle center axis provided by the utility model can also have the following characteristics: the first waterproof component and the second waterproof component are sealing waterproof rings, and the third waterproof component is a sealing waterproof strip.
[0011] The novel waterproof component for the bicycle center shaft provided by the utility model can also have the following feature: the bearing is a ball bearing.
[0012] Functions and effects of utility models
[0013] According to the new waterproof component used on the bicycle middle shaft involved in the utility model, it is intended to prevent water and dust from entering the middle shaft through the first waterproof part between the small diameter section of the middle shaft bowl and the shaft sleeve, the second waterproof part between the side cover and the shaft core, and the third waterproof part between the bearing and the side cover, thereby ensuring the lubrication of the inside of the middle shaft, extending the service life of the middle shaft, and further ensuring the practical effect of the utility model. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a cross-sectional view of the utility model, the middle shaft, and the crank;
[0015] Figure 2 yes Figure 1 A partial enlarged view of
[0016] Figure 3 yes Figure 2 Enlarged view of point I in FIG.
[0017] Description of reference numerals:
[0018] 1. Middle shaft; 11. Shaft core; 12. Shaft sleeve; 2. Middle shaft bowl; 3. Bearing; 4. Side cover; 5. Second waterproof part; 6. Crank;
[0019] 7. The first waterproof component; 8. The third waterproof component. DETAILED DESCRIPTION
[0020] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is specifically described in the following embodiments in conjunction with the accompanying drawings.
[0021] Example
[0022] Figure 1 It is a cross-sectional view of the utility model, the middle shaft and the crank. Figure 2 yes Figure 1 A partial enlarged view of Figure 3 yes Figure 2 Enlarged view of point I in FIG.
[0023] like Figures 1 to 3 As shown, this embodiment provides a new waterproof component for a bicycle middle shaft, which is arranged on the middle shaft 1 and located at the connection between the middle shaft 1 and the crank 6. The middle shaft 1 includes an axis core 11 and a sleeve 12 arranged on the axis core 11. The length of the sleeve 12 is less than the length of the axis core 11, and includes: a middle shaft bowl 2, a bearing 3, and a side cover 4. Among them, the sleeve 12 of the middle shaft 1 is provided with an annular protrusion for abutting against the middle shaft bowl 2.
[0024] In this embodiment, the central shaft bowl 2 is sleeved on the central shaft 1. The central shaft bowl 2 is in the shape of a hollow stepped shaft, having a small diameter section and a large diameter section. At least a part of the small diameter section is in contact with the outer wall of the shaft sleeve 12, and a first waterproof member 7 is provided between the small diameter section and the shaft sleeve 12. The diameter of the large diameter section is greater than the diameter of the shaft core 11 and is located above the shaft core 11. An annular groove for placing the first waterproof member 7 is provided on the small diameter section or the shaft sleeve 12 of the central shaft bowl 2, and the size of the annular groove is not greater than the size of the first waterproof member 7.
[0025] When in use, the first waterproof member 7 can prevent water and dust from entering into the interior of the central shaft 1 through the joint between the central shaft bowl 2 and the shaft sleeve 12, thereby ensuring the practicality of the utility model.
[0026] In this embodiment, the bearing 3 is disposed between the large diameter section of the central shaft bowl 2 and the horizontal section of the side cover 4, and a third waterproof member 8 is disposed between the side end surface of the bearing 3 and the vertical section of the side cover 4. The bearing 3 is preferably a ball bearing 3.
[0027] In this embodiment, the side cover 4 is sleeved on the central shaft 1 and is located between the large diameter section of the central shaft bowl 2 and the shaft core 11. The inner wall of the side cover 4 fits the outer wall of the shaft core 11, and a groove is provided on the inner wall of the side cover 4. The second waterproof member 5 is provided in the groove. The side cover 4 is in the shape of a T-shaped hollow shaft, with a vertical section and a horizontal section. The size of the vertical section is not greater than the size between the large diameter section and the shaft core 11, and the vertical section abuts against the crank 6. The groove is preferably an annular groove.
[0028] When in use, the size of the vertical section is not larger than the size between the large diameter section and the shaft core 11, so that the side cover 4 will not affect the movement of the middle shaft bowl 2. At this time, the third waterproof part 8 located between the side end face of the bearing 3 and the vertical section of the side cover 4 can prevent water and dust from entering the interior of the middle shaft 1 through the gap between the vertical section of the side cover 4 and the large diameter section of the middle shaft bowl 2, thereby further ensuring the practicality of the present utility model.
[0029] In this embodiment, the first waterproof member 7, the second waterproof member 5, and the third waterproof member 8 are all waterproof members made of rubber material. The first waterproof member 7 and the second waterproof member 5 are preferably sealed waterproof rings, and the third waterproof member 8 is preferably a sealed waterproof strip.
[0030] Functions and Effects of the Embodiments
[0031] According to the new waterproof component used on the bicycle middle shaft involved in the utility model, it is intended to prevent water and dust from entering the middle shaft through the first waterproof part between the small diameter section of the middle shaft bowl and the shaft sleeve, the second waterproof part between the side cover and the shaft core, and the third waterproof part between the bearing and the side cover, thereby ensuring the lubrication of the inside of the middle shaft, extending the service life of the middle shaft, and further ensuring the practical effect of the utility model.
[0032] The above implementation modes are preferred examples of the present invention and are not intended to limit the protection scope of the present invention.
Claims
1. A novel waterproof component for a bicycle center shaft, arranged on the center shaft and located at the connection between the center shaft and the crank, the center shaft comprises a shaft core and a shaft sleeve arranged on the shaft core, the length of the shaft sleeve is less than the length of the shaft core, and is characterized in that: include: A central shaft bowl is sleeved on the central shaft, the central shaft bowl is in the shape of a hollow stepped shaft, and has a small diameter section and a large diameter section, at least a part of the small diameter section is in contact with the outer wall of the sleeve, and a first waterproof member is provided between the small diameter section and the sleeve, the diameter of the large diameter section is greater than the diameter of the shaft core, and is located above the shaft core, The side cover is sleeved on the central shaft and located between the large diameter section of the central shaft bowl and the shaft core. The inner wall of the side cover is in contact with the outer wall of the shaft core, and a groove is provided on the inner wall of the side cover. A second waterproof member is provided in the groove. The side cover is in the shape of a T-shaped hollow shaft and has a vertical section and a horizontal section. The size of the vertical section is not greater than the size between the large diameter section and the shaft core, and the vertical section is against the crank. The bearing is arranged between the large diameter section of the central shaft bowl and the horizontal section of the side cover, and a third waterproof part is arranged between the side end surface of the bearing and the vertical section of the side cover.
2. The novel waterproof component for a bicycle center shaft according to claim 1 is characterized in that: in, The first waterproof component, the second waterproof component, and the third waterproof component are all waterproof components made of rubber material.
3. The novel waterproof component for a bicycle center shaft according to claim 1 is characterized in that: in, The first waterproof component and the second waterproof component are sealing waterproof rings, and the third waterproof component is a sealing waterproof strip.
4. The novel waterproof assembly for a bicycle center shaft according to claim 1 is characterized in that: in, The bearing is a ball bearing.