Bearing of mountain bike

Abstract

The utility model discloses a mountain bike bearing which comprises an outer ring, an inner ring, a steel ball and a retainer, the outer ring is sleeved on the inner ring, the inner ring is aligned with one end of the outer ring, the axial length of the inner ring is larger than that of the outer ring, the retainer is located between the outer ring and the inner ring, and the steel ball is arranged on the retainer. The steel balls are installed in pockets of the retainer, one end of the outer ring is provided with a concave dustproof groove, an oil seal cover is embedded in the dustproof groove, the oil seal cover comprises a sealing body embedded in the dustproof groove, a containing cavity is formed in the sealing body, and an oil seal cover body is installed in the containing cavity; and the spot welding sheet is fixedly arranged on the axial side, close to the oil seal cover, of the inner ring. According to the utility model, the problems that the service life of the bearing is shortened and the running performance is reduced due to the fact that the existing bearing has defects in the aspects of dust prevention and sealing and is easily influenced by pollutants such as dust and water when being used in a severe environment can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of bearings, in particular to a bearing for a mountain bicycle. Background Art

[0002] With improved living standards and a growing awareness of health, more and more people are turning to outdoor sports and fitness. Mountain biking, as an outdoor activity that combines exercise and adventure, has naturally attracted a large number of enthusiasts. Riding a mountain bike not only provides physical exercise but also allows people to release stress and enjoy the joy of the outdoors while connecting with nature. The importance of bearings in mountain biking is self-evident, directly impacting the performance, durability, and rider experience of the bike. Mountain bikes often encounter harsh environments. During rainy weather, contaminants such as mud, sand, dust, water, and oil can easily penetrate bearings, leading to poor lubrication, increased wear, and even bearing failure. This not only reduces bearing performance, shortens its service life, and increases maintenance costs, but also significantly increases the need for a new bearing design that meets these demands. Utility Model Content

[0003] The utility model provides a mountain bike bearing, which can solve the problems that existing bearings are insufficient in dustproofing and sealing, especially when used in harsh environments, they are easily affected by pollutants such as dust and moisture, resulting in shortened bearing life and reduced operating performance.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a bearing for a mountain bike, comprising an outer ring, an inner ring, a steel ball and a retaining frame, wherein the outer ring is sleeved on the inner ring, the inner ring is aligned with one end of the outer ring, the axial length of the inner ring is greater than the axial length of the outer ring, the retaining frame is located between the outer ring and the inner ring, the steel ball is installed in the pocket of the retaining frame, one end of the outer ring is provided with an inwardly concave dustproof groove, an oil seal cover is embedded in the dustproof groove, the oil seal cover includes a sealing body embedded in the dustproof groove, an accommodating cavity is provided in the sealing body, an oil seal cover body is installed in the accommodating cavity, the sealing A first lip and a second lip are provided at one axial end of the body, the first lip extends outward along the axial direction of the outer ring, and the second lip contacts the radial outer side wall of the inner ring. An extension portion is also provided on the sealing body on the inner side of the second lip, and one end of the extension portion is abutted against the radial outer side of the inner ring; a spot welding piece is fixedly arranged on the axial side of the inner ring close to the oil seal cover, and the diameter of the spot welding piece is larger than the diameter of the radial outer side of the inner ring. The oil seal cover effectively prevents dust and moisture from entering the interior of the bearing, keeps the bearing clean and lubricated, and prevents leakage of grease inside the bearing. The spot welding piece is fixed on the inner ring, which improves the stability of the overall structure.

[0005] Preferably, a first raceway matching the steel ball is provided on the radial inner wall of the outer ring, and a second raceway matching the steel ball is provided on the radial outer wall of the inner ring. The steel ball is fixed by the first raceway and the second raceway to support and guide the rolling of the steel ball.

[0006] Preferably, at least one mounting groove is provided on the radial outer side wall of the outer ring along the circumferential direction, and an anti-slip ring is embedded in the mounting groove to improve the anti-slip performance of the bearing during installation.

[0007] Preferably, a circle of openings is provided on one side of the sealing body away from the first lip along the circumferential direction, and the openings are communicated with the accommodating cavity, and the openings facilitate installation and removal of the oil seal cover body.

[0008] Preferably, the cross section of the oil seal cover body is L-shaped, which has a simple structure and is easy to process.

[0009] Compared with the prior art, the beneficial effects of the present invention are:

[0010] The oil seal can more effectively block the intrusion of external dust and moisture, protecting the bearing from contamination. It also effectively prevents the leakage of grease inside the bearing, improving the bearing's durability and reliability. The bearing itself has excellent self-lubricating properties and does not require an additional lubrication system, saving additional installation and maintenance costs. It can also meet the needs of dirty and humid working environments. The spot weld fixes the inner ring, reducing the relative displacement of the bearing during operation and improving the accuracy and stability of operation. This can solve the problem that existing bearings have deficiencies in dustproofing and sealing, especially when used in harsh environments, which are easily affected by pollutants such as dust and moisture, resulting in shortened bearing life and reduced operating performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a main sectional structural diagram of the present utility model;

[0012] Figure 2 This is a main cross-sectional structural diagram of the outer ring of the utility model;

[0013] Figure 3 This is a main cross-sectional structural diagram of the inner ring of the utility model;

[0014] Figure 4 It is a partial enlarged view of point A of the present utility model;

[0015] Figure 5 It is a schematic diagram of the cross-sectional structure of the sealing body of the present invention.

[0016] Reference numerals:

[0017] 1. Outer ring, 11. First raceway, 12. Mounting groove, 13. Dustproof groove, 2. Inner ring, 3. Steel ball, 4. Cage, 5. Spot welding sheet, 6. Oil seal cover, 61. Sealing body, 611. Accommodating cavity, 612. Opening, 62. Oil seal cover body, 63. First lip, 64. Second lip, 65. Horizontal extension, 7. Anti-slip ring. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0019] like Figure 1-5 As shown, the present invention aims to solve the problems that existing bearings are insufficient in dustproofing and sealing, especially when used in harsh environments, they are easily affected by pollutants such as dust and moisture, resulting in shortened bearing life and reduced operating performance. The present invention provides the following technical solutions: A bearing for a mountain bike, comprising an outer ring 1, an inner ring 2, a steel ball 3 and a retaining frame 4. The outer ring 1 is sleeved on the inner ring 2, the inner ring 2 is aligned with one end of the outer ring 1, the axial length of the inner ring 2 is greater than the axial length of the outer ring 1, the retaining frame 4 is located between the outer ring 1 and the inner ring 2, the steel ball 3 is installed in the pocket of the retaining frame 4, one end of the outer ring 1 is provided with an inwardly concave dustproof groove 13, an oil seal cover 6 is embedded in the dustproof groove 13, the oil seal cover 6 includes a sealing body 61 embedded in the dustproof groove 13, the sealing body An accommodating cavity 611 is provided in 61, and an oil seal cover body 62 is installed in the accommodating cavity 611. A first lip 63 and a second lip 64 are provided at one axial end of the sealing body 61. The first lip 63 extends outward along the axial direction of the outer ring 1, and the second lip 64 contacts the radial outer side wall of the inner ring 2. An extension portion 65 is also provided on the inner side of the second lip 64 of the sealing body 61, and one end of the extension portion 65 is abutted against the radial outer side of the inner ring 2; a spot welding piece 5 is fixedly provided on the axial side of the inner ring 2 close to the oil seal cover 6, and the diameter of the spot welding piece 5 is larger than the diameter of the radial outer side of the inner ring 2. The oil seal cover effectively prevents dust and moisture from entering the interior of the bearing, keeps the bearing clean and lubricated, and prevents leakage of grease inside the bearing. The spot welding piece is fixed on the inner ring, which improves the stability of the overall structure.

[0020] In this embodiment, if Figure 2 and Figure 3 As shown, a first raceway 11 matching the steel ball 3 is provided on the radial inner wall of the outer ring 1, and a second raceway 21 matching the steel ball 3 is provided on the radial outer wall of the inner ring 2. The steel ball is fixed by the first raceway 11 and the second raceway 21 to support and guide the rolling of the steel ball.

[0021] In this embodiment, if Figure 1-2 As shown, at least one mounting groove 12 is provided on the radial outer side wall of the outer ring 1 along the circumferential direction, and an anti-slip ring 7 is embedded in the mounting groove 12 to improve the anti-slip performance of the bearing during installation.

[0022] In this embodiment, if Figure 5 As shown, a circle of openings 612 is provided along the circumferential direction on one side of the sealing body 61 away from the first lip 63 . The openings 612 are communicated with the accommodating cavity 611 . The openings 612 facilitate installation and removal of the oil seal cover body.

[0023] In this embodiment, if Figure 4 As shown, the cross section of the oil seal cover body 62 is L-shaped, with a simple structure and easy processing.

[0024] In this embodiment, if Figure 1 As shown, the inner ring 2 is 9.5mm high, with an outer diameter of φ35.4mm, a groove diameter of φ33.737mm, and an inner diameter of φ30mm. The outer ring 1 is 9mm high, with an outer diameter of φ47mm, a groove diameter of φ43.263mm, and an inner diameter of φ41.6mm. The dustproof groove 13 on the upper portion of the outer ring 1 has a diameter of φ44.3mm and a depth of 3.0mm. The bearing has a dynamic load rating of 7210N and a static load rating of 5050N. This bearing does not allow the shaft to tilt relative to the housing, as radial loads will generate additional axial forces. The groove curvature of the inner ring 2 is 2.43°, and that of the outer ring 1 is 2.48°. There are 14 steel balls 3, each with a diameter of 4.763mm.

[0025] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0026] In addition, the terms "first," "second," and so on, used in this utility model are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0027] In this utility model, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0028] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in this field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

Claims

1. A mountain bike bearing, comprising an outer ring (1), an inner ring (2), a steel ball (3) and a retainer (4), wherein the outer ring (1) is sleeved on the inner ring (2), the inner ring (2) is aligned with one end of the outer ring (1), the axial length of the inner ring (2) is greater than the axial length of the outer ring (1), the retainer (4) is located between the outer ring (1) and the inner ring (2), and the steel ball (3) is installed in the pocket of the retainer (4), characterized in that: One end of the outer ring (1) is provided with an inwardly concave dustproof groove (13), and an oil seal cover (6) is embedded in the dustproof groove (13). The oil seal cover (6) includes a sealing body (61) embedded in the dustproof groove (13), and a receiving cavity (611) is provided in the sealing body (61). The oil seal cover body (62) is installed in the receiving cavity (611). An axial end of the sealing body (61) is provided with a first lip (63) and a second lip (64), the first lip (63) extends outward along the axial direction of the outer ring (1), and the second lip (64) contacts the radial outer side wall of the inner ring (2). An extension portion (65) is also provided on the inner side of the second lip (64) of the sealing body (61), and one end of the extension portion (65) is against the radial outer side of the inner ring (2); A spot welding sheet (5) is fixedly arranged on an axial side of the inner ring (2) close to the oil seal cover (6), and the diameter of the spot welding sheet (5) is larger than the diameter of the radial outer side surface of the inner ring (2).

2. The mountain bike bearing according to claim 1, characterized in that: A first raceway (11) matching the steel ball (3) is provided on the radial inner wall of the outer ring (1), and a second raceway (21) matching the steel ball (3) is provided on the radial outer wall of the inner ring (2).

3. The mountain bike bearing according to claim 1, characterized in that: At least one mounting groove (12) is provided on the radial outer side wall of the outer ring (1) along the circumferential direction, and an anti-slip ring (7) is embedded in the mounting groove (12).

4. The mountain bike bearing according to claim 1, characterized in that: A circle of openings (612) is provided on one side of the sealing body (61) away from the first lip (63) along the circumferential direction, and the openings (612) are communicated with the accommodating cavity (611).

5. The mountain bike bearing according to claim 1, characterized in that: The cross section of the oil seal cover body (62) is L-shaped.

Images