Thin-wall bearing with sealing effect
By designing thin-walled bearings with built-in sealing effects and adopting a labyrinth sealing structure, the problem of high cost of skeleton rubber sealing rings is solved, effective dust and leakage prevention is achieved, production costs are reduced, and product competitiveness is improved.
Patent Information
- Application Number
- CN202422936641.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-29
- Publication Date
- 2025-09-26
- Estimated Expiration
- 2034-11-29
AI Technical Summary
Existing rolling bearings using skeleton rubber seals require special molds for production, which is costly and reduces product competitiveness.
The thin-walled bearings are designed with a self-sealing effect and adopt a labyrinth seal structure. The steps of the outer and inner rings of the bearing cooperate with the inserted retainer to form a double-sided labyrinth seal, avoiding the use of traditional skeleton rubber seals and molds.
It effectively prevents the intrusion of dust and impurities, prevents grease leakage, reduces production costs, and improves product market competitiveness.
Smart Images
Figure CN223387810U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of rolling bearings, and in particular relates to a thin-wall bearing with a self-sealing effect. Background Art
[0002] Bearings, as key components in mechanical transmissions, are widely used in industry. During operation, the rolling elements simultaneously slide and roll relative to the inner and outer rings, subjecting the rolling elements to complex and variable friction forces. In the bearing research and manufacturing industry, conventional rolling bearings primarily consist of an outer ring, inner ring, rolling elements, a cage, and a sealing ring. The sealing structure and effectiveness of the seal are crucial to bearing performance, effectively preventing impurities from entering the bearing interior and reducing grease loss. Currently, the most commonly used type is a skeleton rubber seal ring. This seal ring is inserted into a sealing groove machined into the bearing ring. These seal rings are characterized by simple installation and replacement, and excellent sealing performance, making them suitable for small- to medium-sized and large-scale production. However, the production of skeleton rubber seal rings requires specialized molds, which are expensive and costly. This makes production expensive for large, extra-large, small-batch, and multi-variety products, significantly reducing product competitiveness. Utility Model Content
[0003] The utility model aims to overcome the problem that the existing rolling bearings using skeleton rubber seals require special molds, which are expensive, resulting in high costs and significantly reduced product competitiveness. A thin-walled bearing with a self-sealing effect is proposed.
[0004] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions:
[0005] A thin-walled bearing with a self-sealing effect comprises a bearing outer ring and a bearing inner ring, wherein the bearing inner ring is arranged on the inner side of the bearing outer ring, and rolling elements and an insert-type retaining frame are arranged between the bearing outer ring and the bearing inner ring; a sealing rib A is provided on one side of the bearing outer ring, and a step A is provided on the other side corresponding thereto; a step B is provided on one side of the bearing inner ring, and a step C is also provided on the other side corresponding thereto; an insert-type retaining frame is used between the bearing outer ring and the bearing inner ring, and the closed end face of the insert-type retaining frame has a sealing rib B; the end face of the insert-type retaining frame has a sealing cover which is placed between the step A of the bearing outer ring and the step C of the bearing inner ring on the other side.
[0006] When the insert-type retainer is installed between the bearing outer ring and the bearing inner ring, the sealing rib A on one side of the bearing outer ring and the step B on one side of the bearing inner ring form a labyrinth seal structure, and the insert-type retainer sealing rib B, the bearing outer ring step A and the bearing inner ring step C on the other side of the bearing outer ring form a labyrinth seal structure, thus forming a double-sided labyrinth seal structure.
[0007] The outer inner diameter of the bearing outer ring is provided with an outer raceway for the rolling body to cooperate with.
[0008] Inner raceways for the rolling elements to cooperate with are provided on the inner and outer diameters of the inner ring of the bearing.
[0009] The insertable retainer is a comb-shaped insertable retainer with one side open, and is provided with evenly distributed self-locking circular pockets.
[0010] Compared with the existing technology, the present invention offers the following advantages: It features a self-contained sealing structure, replacing conventional skeleton rubber seals. One side of the bearing outer ring is designed as a sealing rib, which mates with a small clearance with step B on one side of the bearing inner ring, forming a one-sided labyrinth seal. The other side of the bearing outer ring is designed with step A, and the corresponding step C on the other side of the inner ring mates with a small clearance with step A on the outer ring and step C on the inner ring, forming a second-sided labyrinth seal. This creates a double-sided labyrinth seal, effectively preventing the intrusion of dust and impurities and preventing grease leakage from the bearing interior. This sealing structure is entirely machined, eliminating the need for the molds used in traditional skeleton seals, reducing costs and significantly enhancing the product's market competitiveness. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 It is a structural diagram of the present utility model.
[0012] Figure 2 This is a schematic structural diagram of the bearing outer ring of the present utility model.
[0013] Figure 3 This is a schematic diagram of the bearing inner ring structure of the present utility model.
[0014] Figure 4 This is a schematic diagram of the retainer structure of the present utility model.
[0015] Figure 5 This is a top view of the retainer structure of the present invention.
[0016] Markings in the figure: 1. Bearing outer ring, 2. Bearing inner ring, 3. Rolling element, 4. Insert retainer, 5. Sealing rib A, 6. Step A, 7. Step B, 8. Step C, 9. End face, 10. Sealing rib B, 11. Outer and inner diameter, 12. Outer raceway, 13. Inner and outer diameter, 14. Inner raceway, 15. Circular pocket. DETAILED DESCRIPTION
[0017] The specific implementation of the present invention is further described in detail below with reference to the accompanying drawings.
[0018] like Figure 1-Figure 5As shown, a thin-walled bearing with a self-sealing effect includes a bearing outer ring 1 and a bearing inner ring 2, the bearing inner ring 2 is arranged on the inner side of the bearing outer ring 1, and rolling elements 3 and an insert-type retainer 4 are arranged between the bearing outer ring 1 and the bearing inner ring 2; a sealing rib A5 is provided on one side of the bearing outer ring 1, and a step A6 is provided on the other side thereof; a step B7 is provided on one side of the bearing inner ring 2, and a step C8 is also designed on the other side thereof; an inner raceway 14 for the rolling elements 3 to cooperate is provided on the inner and outer diameters 11 of the bearing inner ring 2, a step B7 is provided on one side of the bearing inner ring 2, and a step C8 is designed on the other side thereof; an insert-type retainer 4 is used between the bearing outer ring 1 and the bearing inner ring 2, and the end face 9 of the insert-type retainer 4 has a self-sealing rib B10; the end face 9 of the insert-type retainer 4 has a self-sealing cover placed on the step of the bearing outer ring on the other side A6 and the step C8 of the bearing inner ring 2; when the inserted retainer 4 is installed between the bearing outer ring 1 and the bearing inner ring 2, the sealing rib A5 on one side of the bearing outer ring 1 and the step B7 on one side of the bearing inner ring 2 form a labyrinth sealing structure, and the other side of the bearing outer ring 1 is composed of the sealing rib B10 of the inserted retainer 4 and the step A6 of the bearing outer ring 1 and the step C8 of the bearing inner ring 2 to form a labyrinth sealing structure, that is, a double-sided labyrinth sealing structure is formed; here, one side of the bearing outer ring 1 is provided with a sealing rib and the sealing step of the bearing inner ring 2 to form a labyrinth sealing structure, and the other side uses a comb-shaped inserted retainer with an open side, and a sealing cover is designed on the end face, which is installed between the sealing step on the other side of the outer ring and the sealing step on the other side of the bearing inner ring 2 to form a labyrinth sealing structure, finally realizing the double-sided labyrinth sealing function of the bearing, which can effectively prevent foreign matter from entering the interior of the bearing.
[0019] The outer inner diameter 11 of the bearing outer ring 1 is provided with an outer raceway 12 for the rolling elements 3. A sealing rib A5 is designed on one side of the outer ring, and a step A6 is designed on the other side. The sealing rib on one side of the outer ring is integrated with the bearing ring, and can be machined to prevent the seal ring from loosening and falling off during use. The insert retainer 4 is a comb-shaped insert retainer with one end open. The closed end face of the insert retainer 4 has a built-in sealing rib B10 and evenly distributed circular pockets 15 with self-locking features. This insert retainer 4 is designed as a comb-shaped insert retainer with one end open. The other end face of the insert retainer has a built-in sealing cover structure, providing a better sealing effect. Furthermore, the entire retainer can be machined, eliminating the need for traditional molds for skeleton seals, reducing costs.
[0020] In specific use, the utility model features a sealing rib A5 on one side of the bearing outer ring 1, which cooperates with a small clearance on a step B7 on one side of the bearing inner ring 2 to form a labyrinth seal on one side. A step A6 is designed on the other side of the bearing outer ring 1, and a corresponding step C8 is designed on the other side of the bearing inner ring. When the insertable retainer 4 with its own sealing cover is installed between the bearing outer ring 1 and the bearing inner ring 2, the sealing rib B10 is positioned between step A6 of the bearing outer ring 1 and step C8 of the bearing inner ring 2, and cooperates with a small clearance on these steps to form a labyrinth seal on the other side. These labyrinth seals on both sides form a sealing barrier for the bearing, effectively preventing the intrusion of dust and impurities and preventing grease leakage from the bearing. This sealing structure is completely machined, eliminating the need for the molds used for traditional skeleton seals, reducing costs and significantly enhancing the product's market competitiveness.
[0021] The above are only preferred specific implementation methods of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed in the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.
Claims
1. A thin-walled bearing with a self-sealing effect, comprising a bearing outer ring (1) and a bearing inner ring (2), wherein the bearing inner ring (2) is arranged on the inner side of the bearing outer ring (1), and a rolling element (3) and an insert-type retainer (4) are arranged between the bearing outer ring (1) and the bearing inner ring (2); wherein the thin-walled bearing comprises: A sealing rib A (5) is provided on one side of the bearing outer ring (1), and a step A (6) is provided on the other side thereof; a step B (7) is provided on one side of the bearing inner ring (2), and a step C (8) is also provided on the other side thereof; an insert-type retainer (4) is used between the bearing outer ring (1) and the bearing inner ring (2), and a sealing rib B (10) is provided on the closed end face (9) of the insert-type retainer (4); and a sealing cover is provided on the end face (9) of the insert-type retainer (4) and is placed between the step A (6) of the bearing outer ring (1) on the other side and the step C (8) of the bearing inner ring (2).
2. The thin-walled bearing with self-sealing effect according to claim 1 is characterized in that: When the insert-type retainer (4) is installed between the bearing outer ring (1) and the bearing inner ring (2), the sealing rib A (5) on one side of the bearing outer ring (1) and the step B (7) on one side of the bearing inner ring (2) form a labyrinth seal structure, and the sealing rib B (10) of the insert-type retainer (4), the step A (6) of the bearing outer ring (1) and the step C (8) of the bearing inner ring (2) on the other side of the bearing outer ring (1) form a labyrinth seal structure, thus forming a double-sided labyrinth seal structure.
3. The thin-walled bearing with self-sealing effect according to claim 1 is characterized in that: An outer raceway (12) for the rolling body (3) to cooperate with is provided on the outer inner diameter (11) of the bearing outer ring (1).
4. The thin-walled bearing with self-sealing effect according to claim 1, characterized in that: Inner raceways (14) for the rolling elements (3) to cooperate with are provided on the inner and outer diameters (13) of the bearing inner ring (2).
5. The thin-walled bearing with self-sealing effect according to claim 1 is characterized in that: The insert-type retainer (4) is a comb-shaped insert-type retainer (4) with one side open, and the retainer has evenly distributed self-locking circular pockets (15).