Airtight bearing with three-sealing structure

Abstract

The invention relates to an airtight bearing with a three-sealing structure. Belongs to the technical field of automobile bearings. The problems that an existing tire inflation and deflation airtight bearing is insufficient in air tightness, prone to being polluted, short in service life and the like are mainly solved. The air-tight bearing is mainly characterized in that the air-tight bearing is used for inflating and deflating a tire and comprises a bearing outer ring, a bearing inner ring, a steel ball and a nylon retainer; rSM type sealing rings are arranged on one sides of the end surfaces of the steel balls, the bearing outer ring and the bearing inner ring; a first sealing ring assembly is arranged on one side of an air channel of the steel ball, the bearing outer ring and the bearing inner ring, and a second sealing ring assembly is arranged on the other side of the air channel opposite to the first sealing ring assembly. The tire inflation and deflation airtight bearing has good sealing effect and stability, and is mainly used for improving the airtightness of the tire inflation and deflation airtight bearing and prolonging the service life of the tire inflation and deflation airtight bearing.

Description

Technical Field

[0001] The present invention belongs to the technical field of automobile bearings and particularly relates to an airtight bearing with a triple-seal structure. Background Art

[0002] Existing airtight bearings used for tire inflation and deflation generally have a single-seal or double-seal bearing sealing structure, which has problems such as insufficient airtightness, susceptibility to contamination, and short service life. Summary of the Invention

[0003] The purpose of the present invention is to provide an airtight bearing with a triple-seal structure to address the above-mentioned deficiencies. By introducing the triple-seal structure, the airtightness and durability of the bearing are significantly improved.

[0004] The technical solution of the present invention is: an airtight bearing with a three-seal structure, used for tire inflation and deflation, including a bearing outer ring, a bearing inner ring, a steel ball, and a nylon retainer, and is characterized in that: an RSM-type sealing ring is provided on one side of the end face of the steel ball and the bearing outer ring and the bearing inner ring; a first sealing ring assembly is provided on one side of the air passage between the steel ball and the bearing outer ring and the bearing inner ring, and a second sealing ring assembly is provided on the other side of the air passage opposite to the first sealing ring assembly.

[0005] In the technical solution of the present invention, the first sealing ring assembly and the second sealing ring assembly are sealing ring assemblies with the same structure.

[0006] The sealing ring assembly in the technical solution of the present invention is composed of an L-shaped frame and a plurality of L-shaped sealing lips.

[0007] The sealing ring assembly in the technical solution of the present invention is composed of two sealing ring assemblies that are fitted together.

[0008] In the technical solution of the present invention, the sealing lip of one of the sealing ring assemblies abuts against the inner bend of the L-shaped frame of the other sealing ring assembly.

[0009] The sealing lips in the technical solution of the present invention are three L-shaped lips.

[0010] In the technical solution of the present invention, the material of the sealing lip is nitrile rubber + SPCC; the material of the L-shaped frame is steel plate; and there are 10 steel balls.

[0011] The air passage in the technical solution of the present invention is composed of an air inlet threaded hole on the outer ring of the bearing and an air outlet hole on the inner ring of the bearing.

[0012] In the technical solution of the present invention, there is one air inlet threaded hole with a diameter of 10 mm; there are six air outlet holes with a diameter of 10 mm.

[0013] The present invention is based on an airtight bearing composed of a bearing outer ring, a bearing inner ring, a steel ball and a nylon retaining frame. An RSM-type sealing ring is provided on one side of the steel ball and the end face of the bearing outer ring and the bearing inner ring, a first sealing ring assembly is provided on one side of the air passage between the steel ball and the bearing outer ring and the bearing inner ring, and a second sealing ring assembly is provided on the other side of the air passage opposite to the first sealing ring assembly, forming an airtight bearing with a three-sealing structure. The RSM-type sealing ring is used to prevent dust and other objects from entering the interior of the bearing to avoid pollution. The first sealing ring assembly and the second sealing ring assembly have good sealing effect and stability, and can effectively prevent gas leakage during inflation and deflation.

[0014] The invention has good sealing effect and stability, and is mainly used to improve the air tightness of tire inflation and deflation and to extend the service life of bearings. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the present invention.

[0016] Figure 2 for Figure 1 side view.

[0017] Figure 3 It is an enlarged schematic diagram of the sealing ring assembly of the present invention.

[0018] In the figure: 1-RSM type sealing ring; 2-nylon retainer; 3-steel ball; 4-bearing outer ring; 5-sealing ring assembly; 6-bearing inner ring. DETAILED DESCRIPTION

[0019] The present invention will be further described below with reference to the accompanying drawings.

[0020] like Figure 1 As shown, an embodiment of an airtight bearing with a triple-sealing structure of the present invention is used for tire inflation and deflation, and is composed of a bearing outer ring 4, a bearing inner ring 6, a steel ball 3, a nylon retainer 2, an RSM-type sealing ring 1, a first sealing ring assembly and a second sealing ring assembly, wherein the RSM-type sealing ring 1, the first sealing ring assembly and the second sealing ring assembly constitute a triple-sealing structure.

[0021] The bearing outer ring 4, bearing inner ring 6, and steel ball 3 are made of GCr15, the same material as in the prior art. The steel ball 3 is supported by a nylon retainer 2 and mounted between the outer ring 4 and the inner ring 6. The outer ring 4 has a threaded air inlet hole, while the inner ring 6 has six air outlet holes. These two holes form an air passage. The diameter of the threaded air inlet hole is 10 mm, and the diameter of the air outlet hole is 10 mm. There are ten steel balls 3.

[0022] The RSM seal ring 1 is arranged on one side of the end face of the steel ball 3, the bearing outer ring 4 and the bearing inner ring 6. It is a conventional RSM seal structure composed of nitrile rubber and SPCC steel, with strong adaptability. Its inner lip is a multi-lip structure design, which can significantly improve the air outlet efficiency and increase the heat dissipation efficiency. It is used to prevent dust and other objects from entering the bearing to avoid pollution.

[0023] The first and second sealing ring assemblies form a three-seal structure, a sealing ring assembly 5 with identical construction. The first sealing ring assembly is located on the airway between the steel ball 3, the bearing outer ring 4, and the bearing inner ring 6. The second sealing ring assembly is located on the opposite side of the airway from the first sealing ring assembly. The sealing ring assembly 5 consists of an L-shaped frame and two sealing lips with multiple L-shaped lips. The two sealing ring assemblies fit together, with the sealing lip of one sealing ring assembly abutting the inner bend of the L-shaped frame of the other sealing ring assembly. Each sealing lip has three L-shaped lips, made of nitrile rubber and SPCC, and the L-shaped frame is made of steel plate. The airway is formed by a threaded inlet hole on the bearing outer ring 4 and an outlet hole on the bearing inner ring 6. There is one threaded inlet hole with a diameter of 10 mm, and six outlet holes with a diameter of 10 mm. The scraper has three lips, providing multiple sealing effects, greatly enhancing the sealing effect. The sealing ring assembly 5 has good sealing effect and stability, and can effectively prevent gas leakage during inflation and deflation, so that the tire inflation and deflation airtightness and bearing sealing performance are good.

[0024] The above specific implementation cases are merely explanations of the present invention and are not limitations of the present invention. Those skilled in the art may make non-creative modifications to the above implementation cases as needed based on the present invention, but as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. An airtight bearing with a triple-seal structure, used for tire inflation and deflation, comprising a bearing outer ring (4), a bearing inner ring (6), a steel ball (3) and a nylon retainer (2), characterized in that: An RSM-type sealing ring (1) is provided on one side of the end face of the steel ball (3) and the bearing outer ring (4) and the bearing inner ring (6); a first sealing ring assembly is provided on one side of the air passage between the steel ball (3) and the bearing outer ring (4) and the bearing inner ring (6), and a second sealing ring assembly is provided on the other side of the air passage opposite to the first sealing ring assembly.

2. The airtight bearing with a triple seal structure according to claim 1, characterized in that: The first sealing ring assembly and the second sealing ring assembly are sealing ring assemblies (5) with the same structure.

3. The airtight bearing with a triple seal structure according to claim 2, characterized in that: The sealing ring assembly (5) is composed of an L-shaped frame and a plurality of L-shaped sealing lips.

4. The airtight bearing with a triple seal structure according to claim 3, characterized in that: The sealing ring assembly (5) is composed of two sealing ring assemblies that are fitted together.

5. The airtight bearing with a triple seal structure according to claim 4, characterized in that: The sealing lip of one of the sealing ring assemblies (5) abuts against the inner bend of the L-shaped frame of the other sealing ring assembly.

6. The airtight bearing with a triple seal structure according to claim 5, characterized in that: The sealing lips are three L-shaped lips.

7. An airtight bearing with a triple seal structure according to any one of claims 3 to 6, characterized in that: The material of the sealing lip is nitrile rubber + SPCC; the material of the L-shaped frame is steel plate; and there are 10 steel balls (3).

8. An airtight bearing with a triple-seal structure according to any one of claims 1 to 6, characterized in that: The air passage is composed of an air inlet threaded hole on the bearing outer ring (4) and an air outlet hole on the bearing inner ring (6).

9. The airtight bearing with a triple seal structure according to claim 8, characterized in that: There is one air inlet threaded hole with a diameter of 10 mm; there are six air outlet holes with a diameter of 10 mm.

10. The airtight bearing with a triple-seal structure according to claim 7, characterized in that: The air passage is composed of an air inlet threaded hole on the bearing outer ring (4) and an air outlet hole on the bearing inner ring (6); there is one air inlet threaded hole with a diameter of 10 mm; and there are six air outlet holes with a diameter of 10 mm.

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