CN217002773U

CN217002773U - Novel universal joint dustproof sealing structure

Info

Publication number: CN217002773U
Application number: CN202220350875.4U
Authority: CN
Inventors: 冯贤; 金兄珍; 牛杰; 高天芬; 叶连强; 方静
Original assignee: Wanxiang Qianchao Co Ltd; Wanxiang Group Corp
Current assignee: Wanxiang Qianchao Co Ltd; Wanxiang Group Corp
Priority date: 2022-02-21
Filing date: 2022-02-21
Publication date: 2022-07-19
Anticipated expiration: 2032-02-21

Abstract

The utility model discloses a novel universal joint dustproof sealing structure, which relates to the field of universal joints and comprises a cross shaft, wherein a shaft neck of the cross shaft is sequentially provided with a first-stage shoulder and a second-stage shoulder, an oil seal sleeve is arranged on the second-stage shoulder, and a dustproof cover is sleeved on the first-stage shoulder; the opening part of the dust cover is arranged towards the direction of the bearing outer ring, the tail end of the dust cover is provided with a lip A, and the lip A is matched and sealed with the outer diameter of the bearing outer ring, so that the dust cover is covered on the periphery of the oil seal; the oil seal is internally embedded with the mounting framework, one side of the oil seal, facing the bearing outer ring, is provided with an oil storage tank, the oil storage tank separates the side to form a lip opening B and a lip opening C, the lip opening B is matched with the arc surface of the opening part of the bearing outer ring to form sealing, and the lip opening C is matched with the plane of the opening part of the bearing outer ring to form sealing. The utility model adopts triple sealing design, has better sealing effect and is suitable for environment with worse working condition.

Description

Novel universal joint dustproof sealing structure

Technical Field

The utility model relates to the field of universal joints, in particular to a novel dustproof sealing structure of a universal joint.

Background

As shown in fig. 1, a steering universal joint generally comprises a cross shaft (1 '), four oil seals (2 ') and four bearings (3 '), wherein in the prior art, the oil seal of a rubber sealing element is simple in structure and is designed for a single lip, and the lip and the upper mouth of the bearing are sealed, so that the sealing performance is poor in an environment with severe working conditions, and early failure is caused by easy invasion of external muddy water and the like; in addition, the oil blanket is pure rubber spare for the holistic intensity of oil blanket is not enough, and ageing and deformation appear easily for long-time the use, and lead to the product inefficacy to accelerate.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects in the prior art, and provides a novel universal joint dustproof sealing structure, which increases the sealing performance of a universal joint product and prolongs the service life of the product; the integral strength of the oil seal is improved, and the oil seal has better anti-aging deformation capability.

The purpose of the utility model is achieved by the following technical scheme: the novel universal joint dustproof sealing structure comprises a cross shaft, wherein bearing outer rings are sleeved on four shaft necks of the cross shaft, an oil seal is arranged at the opening part of each bearing outer ring, a roller pin is arranged between each bearing outer ring and each shaft neck, a first-stage shoulder and a second-stage shoulder are sequentially arranged on the shaft necks of the cross shaft, the oil seal sleeves are arranged on the second-stage shoulders, and dust covers are sleeved on the first-stage shoulders; the opening of the dust cover is arranged towards the direction of the bearing outer ring, the tail end of the dust cover is provided with a lip A, and the lip A is matched and sealed with the outer diameter of the bearing outer ring, so that the dust cover is covered on the periphery of the oil seal; the oil seal is embedded with the mounting framework, an oil storage groove is formed in one side, facing the bearing outer ring, of the oil seal and used for storing grease, the oil storage groove separates the side to form a lip B and a lip C, the lip B is matched with the arc surface of the opening portion of the bearing outer ring to form sealing, and the lip C is matched with the plane of the opening portion of the bearing outer ring to form sealing.

As a further technical scheme, the lip A is in clearance fit with the outer diameter of the bearing outer ring.

As a further technical scheme, the lip opening B is in interference fit with the arc surface.

As a further technical scheme, the lip mouth C is in interference fit with the plane.

As a further technical scheme, the oil seal is in interference fit with the second-stage shoulder.

As a further technical scheme, the framework is arranged on one side, deviating from the bearing outer ring, of the oil seal, and the framework is attached to the side face of the second-stage shoulder.

The utility model has the beneficial effects that:

1. the oil seal is combined with the dust cover, so that external muddy water can be effectively prevented from entering, and the service life of the oil seal is prolonged;

2. the oil seal is provided with the double lips, so that the sealing performance is good, and the outer lip further prevents external muddy water from invading, so that the product has longer service life;

3. an oil storage tank is designed between the oil seal lips to store grease, so that the lips are prevented from being worn and failed in an early stage by dry friction during operation;

4. the design of inlaying the skeleton in the oil blanket inside, promoted the bulk strength of axle oil blanket, made it be difficult for ageing deformation, increase of service life.

Drawings

Fig. 1 is a schematic structural diagram of the prior art.

Fig. 2 is a schematic structural diagram of the present invention.

Fig. 3 is a partially enlarged view of the area a in fig. 2.

Fig. 4 is a schematic structural view of the dust cover.

Fig. 5 is a schematic structural view of the oil seal.

Fig. 6 is a schematic structural view of a bearing outer ring.

Description of reference numerals: a cross shaft 1 ', an oil seal 2 ' and a bearing 3 ';

the bearing comprises a cross shaft 1, a first-stage shoulder 11, a second-stage shoulder 12, a bearing outer ring 2, an arc surface 21, a plane 22, an oil seal 3, a framework 31, an oil storage groove 32, a lip B33, a lip C34, a roller pin 4, a dust cover 5 and a lip A51.

Detailed Description

The utility model will be described in detail below with reference to the following drawings:

example (b): as shown in the attached drawings 2-6, the novel universal joint dustproof sealing structure comprises a cross shaft 1, wherein four shaft necks of the cross shaft 1 are all sleeved with a bearing outer ring 2, an oil seal 3 is arranged at a mouth part of the bearing outer ring 2, and a roller pin 4 is arranged between the bearing outer ring 2 and the shaft necks (as shown in the attached drawing 2). Referring to fig. 3, a first-stage shoulder 11 and a second-stage shoulder 12 are sequentially arranged on a shaft neck of the cross shaft 1, the oil seal 3 is sleeved on the second-stage shoulder 12, and the first-stage shoulder 11 is sleeved with the dust cover 5. The mouth of the dust cover 5 is arranged towards the direction of the bearing outer ring 2, the tail end of the dust cover is provided with a lip A51, the lip A51 and the outer diameter of the bearing outer ring 2 are sealed in clearance fit, the dust cover 5 is covered on the periphery of the oil seal 3 to form a first seal, and external muddy water and the like are prevented from invading. The oil seal 3 is embedded with a mounting framework 31, preferably, the framework 31 is arranged on one side of the oil seal 3 departing from the bearing outer ring 2, and the framework 31 is attached to the side surface of the second-stage shoulder 12. The framework 31 effectively improves the overall strength of the oil seal 3, so that the oil seal is not easy to age and deform, and the service life is prolonged. Referring to fig. 5, an oil storage groove 32 is formed in one side of the oil seal 3 facing the bearing outer ring 2, the oil storage groove 32 divides the side into a lip opening B33 and a lip opening C34, and grease is stored in the oil storage groove 32 to prevent dry friction when the lip openings B33 and C34 operate. The lip B33 is matched with the arc surface 21 of the opening part of the bearing outer ring 2 to form a seal, and the lip C34 is matched with the plane 22 of the opening part of the bearing outer ring 2 to form a seal. The second seal and the third seal are formed by the lip B33 and the lip C34, so that external muddy water can be further prevented from invading the inside of the bearing, and the universal joint product has longer service life. Preferably, the lip opening B33 is in interference fit with the arc surface 21. The lip C34 is an interference fit with the flat surface 22. The oil seal 3 is in interference fit with the second-stage shoulder 12.

The utility model adopts triple sealing design, has better sealing effect and is suitable for environment with worse working condition.

It should be understood that equivalent alterations and modifications of the technical solution and the inventive concept of the present invention by those skilled in the art should fall within the scope of the appended claims.

Claims

1. The utility model provides a novel universal joint dustproof sealing structure, includes cross (1), all overlaps on four journals of cross (1) and establishes bearing inner race (2), and the oral area of bearing inner race (2) sets up oil blanket (3), sets up kingpin (4), its characterized in that between bearing inner race (2) and the journal: a first-stage shoulder (11) and a second-stage shoulder (12) are sequentially arranged on a shaft neck of the cross shaft (1), the oil seal (3) is sleeved on the second-stage shoulder (12), and the first-stage shoulder (11) is sleeved with a dust cover (5); the opening of the dust cover (5) is arranged towards the direction of the bearing outer ring (2), the tail end of the dust cover is provided with a lip A (51), and the lip A (51) is matched and sealed with the outer diameter of the bearing outer ring (2) to enable the dust cover (5) to cover the periphery of the oil seal (3); embedding installation skeleton (31) in oil blanket (3), oil blanket (3) are seted up oil storage tank (32) towards one side of bearing inner race (2) and are used for storing grease, and oil storage tank (32) separate this side and form lip B (33) and lip C (34), and lip B (33) form sealedly with arc surface (21) cooperation of bearing inner race (2) oral area, and lip C (34) form sealedly with plane (22) cooperation of bearing inner race (2) oral area.

2. The novel dust-proof sealing structure of the universal joint according to claim 1, characterized in that: the lip A (51) is in clearance fit with the outer diameter of the bearing outer ring (2).

3. The novel dust-proof sealing structure of the universal joint according to claim 1, characterized in that: the lip opening B (33) is in interference fit with the arc surface (21).

4. The novel dust-proof sealing structure of the universal joint according to claim 1, characterized in that: the lip C (34) is in interference fit with the plane (22).

5. The novel universal joint dustproof sealing structure according to claim 1, characterized in that: the oil seal (3) is in interference fit with the second-stage shoulder (12).

6. The novel dust-proof sealing structure of the universal joint according to claim 1, characterized in that: skeleton (31) set up in oil blanket (3) and deviate from one side of bearing inner race (2), and the side laminating of skeleton (31) and second level circular bead (12).