CN215567459U

CN215567459U - Universal fuel-saving seal capable of exhausting

Info

Publication number: CN215567459U
Application number: CN202120308615.6U
Authority: CN
Inventors: 陶肖利; 牛杰
Original assignee: Wanxiang Qianchao Co Ltd; Wanxiang Group Corp
Current assignee: Wanxiang Qianchao Co Ltd; Wanxiang Group Corp
Priority date: 2021-02-03
Filing date: 2021-02-03
Publication date: 2022-01-18
Anticipated expiration: 2031-02-03

Abstract

The utility model discloses an exhaust universal joint oil seal which mainly comprises an oil seal and the like, wherein an outer ring is sleeved on a shaft neck of a cross shaft, a roller pin and a gasket are arranged between the outer ring and the shaft neck of the cross shaft to form a bearing, the oil seal is arranged at the opening parts of the cross shaft and the outer ring, the oil seal is fixed to the outer ring through an oil seal framework, the inner side of the oil seal framework is connected with a sealing lip which is in contact with the shaft neck of the cross shaft to form sealing, and a plurality of arc-shaped concave exhaust grooves are uniformly formed in the surface of the oil seal framework matched with the inner diameter and the end surface of the opening part of the outer ring. The exhaust mechanism is designed on the oil seal framework, so that the gas pressure generated in the bearing during working can be effectively released, the stability of the sealing structure is ensured, the processing is simple, the cost is lower, the exhaust holes are not easy to deform, and the exhaust is stable; the friction heat generation of the bearing can be reduced while the exhaust of the framework structure is utilized, the internal pressure of the bearing is further reduced, and the service life of the universal joint is prolonged.

Description

Universal fuel-saving seal capable of exhausting

Technical Field

The utility model relates to the field of universal joints, in particular to an exhaust universal joint oil seal.

Background

The existing universal joint comprises sealed components mainly including a universal joint pin 1, an oil seal 2, an outer ring 3 and the like, and functional components such as a needle roller 4, a gasket 5 and the like are assembled with the outer ring 3 to form a bearing. When the universal joint works, the bearing is lubricated by lubricating grease, and the friction among the outer ring 3, the roller pin 4 and the cross shaft 1 is reduced, so that the service life of the universal joint is ensured. The sealing structure has the effects of preventing grease leakage, ensuring the lubricating effect and simultaneously isolating foreign matters such as external muddy water from invading. The oil seals 2 of the conventional universal joint are mostly designed in such a way that one or more sealing lips 6 are in interference fit with the cross shaft 1, or are sealed by the pretightening force generated by a spring. In the process of universal joint operation, the gas pressure in the universal joint is increased due to the heat generated by bearing friction, and the oil seal 2 can be loosened or deformed due to gas pressure pushing, so that sealing failure is caused, and the grease is leaked.

The technical scheme of the prior art not only utilizes the design of spring compensation type seal to improve the sealing performance of the oil seal 2, but also adds the exhaust hole 9 with smaller diameter at the lip of the oil seal 2, so that the air pressure inside and outside the bearing is balanced, the sealing failure of the universal joint caused by overlarge air pressure is avoided, and the service life of the universal joint is ensured. The prior art scheme mainly has the following defects: the vent hole 9 with smaller diameter is arranged on the oil seal lip 6, and because the oil seal lip 6 is made of elastic rubber material, the hole meeting the requirement is difficult to be accurately arranged, the manufacturing of a die is complex, the realization of the process is difficult, and the processing cost is higher; in the universal joint operation process, the diameter surface of the cross shaft 1 and the oil seal lip 6 are mutually extruded, so that the shape of the exhaust hole 9 is easily changed or blocked, the exhaust function is influenced, and the original design is violated.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects in the prior art and provide an exhaust universal joint oil seal.

The purpose of the utility model is achieved by the following technical scheme: the universal joint oil seal capable of exhausting mainly comprises a cross shaft, an oil seal, an outer ring, a roller pin, a gasket, a sealing lip, an oil seal framework and an exhaust groove, wherein the outer ring is sleeved on a shaft neck of the cross shaft, the roller pin and the gasket are installed between the outer ring and the shaft neck of the cross shaft to form a bearing, the oil seal is installed at the opening part of the cross shaft and the outer ring, the oil seal is fixed to the outer ring through the oil seal framework, the sealing lip is connected to the inner side of the oil seal framework, the sealing lip is in contact with the shaft neck of the cross shaft to form sealing, and a plurality of arc-shaped concave exhaust grooves are uniformly formed in the surfaces, matched with the inner diameter of the outer ring and the end surface of the opening part, of the oil seal framework.

The exhaust groove of the oil seal framework is divided into a groove A on the end face of the opening and a groove B on the radial surface, the groove A and the groove B only extend to the fillet tangent point of the oil seal framework, and the groove A and the groove B are of two separate groove structures.

The circular angle of the oil seal framework is matched with the oblique chamfer of the outer ring opening to form an exhaust channel.

The directions of the groove A and the groove B form a certain angle with the central axis of the oil seal framework.

The utility model has the beneficial effects that: the exhaust mechanism is designed on the oil seal framework, so that gas pressure generated in the bearing during working can be effectively released, the stability of the sealing structure is ensured, and compared with the oil seal lip opening, the exhaust mechanism is simple in design and processing, low in cost, not easy to deform and stable in exhaust; the friction and heat generation of the bearing can be reduced while the framework structure is used for exhausting, the internal pressure of the bearing is further reduced, and the service life of the universal joint is prolonged; the design of the vent hole utilizes different flow phases and viscosity tension differences of gas and liquid, so that grease leakage can be effectively prevented, and gas discharge can be ensured; the cooperation of the oblique chamfer of the outer ring opening and the oil seal framework is ingeniously utilized, the exhaust hole is designed into two sections of non-through grooves, so that grooves are prevented from being formed in the chamfer, the production and the processing are convenient, and the service life of the die can be effectively prolonged; the problem of current universal joint bearing exhaust hole processing difficulty, inside gas can't discharge and lead to inside temperature and pressure to continue to rise to the oil blanket oil leak that arouses is invalid is solved.

Drawings

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

Fig. 2 is a schematic view of a prior art oil seal type structure.

Fig. 3 is a schematic diagram of a prior art oil seal type two structure.

Fig. 4 is a schematic diagram of three structures of a prior art oil seal.

Fig. 5 is a schematic structural diagram of the present invention.

Fig. 6 is a partially enlarged view of a portion a in fig. 5.

Fig. 7 is a schematic view of the oil seal structure of the present invention.

Description of reference numerals: the device comprises a cross shaft 1, an oil seal 2, an outer ring 3, a roller pin 4, a gasket 5, a sealing lip 6, an oil seal framework 7, an exhaust groove 8, an exhaust hole 9, a fillet 71, a groove A81 and a groove B82.

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, the universal joint oil seal capable of exhausting air mainly comprises a cross shaft 1, an oil seal 2, an outer ring 3, a roller pin 4, a gasket 5, a sealing lip 6, an oil seal framework 7 and an exhaust groove 8, wherein the outer ring 3 is sleeved on a shaft neck of the cross shaft 1, the roller pin 4 and the gasket 5 are installed between the outer ring 3 and the shaft neck of the cross shaft 1 to form a bearing, the oil seal 2 is installed at the opening parts of the cross shaft 1 and the outer ring 3, the oil seal 2 is fixed to the outer ring 3 through the oil seal framework 7, the sealing lip 6 is connected to the inner side of the oil seal framework 7, the sealing lip 6 is contacted with the shaft neck of the cross shaft 1 to form sealing, a plurality of arc concave exhaust grooves 8 are uniformly arranged on the surfaces of the oil seal framework 7, which are matched with the inner diameter and the end surface of the opening part, when the pressure of the gas in the bearing is increased, the gas can be exhausted through the exhaust grooves 8 in time, the temperature formed by internal friction is exhausted at the same time, the balance of the internal pressure inside and the heat of the bearing is reduced, the service life of the universal joint bearing is prolonged. The exhaust groove 8 of the oil seal framework 7 is divided into a groove A81 on the end face of the mouth part and a groove B82 on the radial surface, the grooves A81 and B82 both only extend to the tangential point of a fillet 71 of the oil seal framework 7, and the grooves A81 and B82 are of two-section independent groove structures. The fillet 71 of the oil seal framework 7 is matched with the oblique chamfer of the opening part of the outer ring 3 to form an exhaust channel. Under the prerequisite of guaranteeing the exhaust effect, if oil blanket skeleton 7 corresponds the fluting in 3 oral area chamfer in outer lane, can be too big because of the tool angle, technology realizes the difficulty, and this design can further reduce the mould life-span.

The directions of the groove A81 and the groove B82 form a certain angle with the central axis of the oil seal framework 7. The universal joint bearing reciprocates in the use process, and the groove is formed at a certain angle with the central axis, so that the gas pressure can be discharged in time. The size of the exhaust groove 8 is extremely small, so that the gas passing standard is met, but grease with certain viscosity is not easy to be discharged from the groove, and the purposes of exhausting and storing oil are achieved. The number of the exhaust grooves 8 is designed according to design requirements, and the shape of the exhaust grooves 8 is of any arc-shaped structure.

According to the utility model, through the optimized design of the universal joint sealing structure, the sealing performance of the bearing can be ensured, gas and heat in the bearing can be discharged in time, the working environment of the bearing is improved, and the service life of the bearing is prolonged. The designed exhaust groove 8 structure is convenient to produce and process, the cost of arranging the exhaust hole 9 on the bearing can be effectively reduced, the structure of the sealing lip 6 of the oil seal is not affected, and the sealing effect of the sealing lip 6 can be ensured.

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 universal joint oil blanket can exhaust which characterized in that: the oil seal mainly comprises a cross shaft (1), an oil seal (2), an outer ring (3), a roller pin (4), a gasket (5), a sealing lip (6), an oil seal framework (7) and an exhaust groove (8), wherein the outer ring (3) is sleeved on a shaft neck of the cross shaft (1), the roller pin (4) and the gasket (5) are installed between the outer ring (3) and the shaft neck of the cross shaft (1) to form a bearing, the oil seal (2) is installed at the opening part of the cross shaft (1) and the outer ring (3), the oil seal (2) is fixed to the outer ring (3) through the oil seal framework (7), the sealing lip (6) is connected to the inner side of the oil seal framework (7), the sealing lip (6) is in contact with the shaft neck of the cross shaft (1) to form sealing, and a plurality of arc concave exhaust grooves (8) are uniformly formed on the surfaces matched with the inner diameter and the end surface of the opening part of the outer ring (3) and the oil seal framework (7).

2. The ventable joint oil seal of claim 1, wherein: the exhaust duct (8) of oil blanket skeleton (7) divide into at the recess A (81) of oral area terminal surface and at radial surface's recess B (82), and recess A (81) and recess B (82) all only extend to fillet (71) tangent point department of oil blanket skeleton (7), and recess A (81) and recess B (82) are two sections solitary groove structures.

3. The ventable joint oil seal according to claim 1 or 2, wherein: and a circular bead (71) of the oil seal framework (7) is matched with an oblique chamfer at the opening part of the outer ring (3) to form an exhaust channel.

4. The ventable joint oil seal of claim 2, wherein: the directions of the groove A (81) and the groove B (82) form a certain angle with the central axis of the oil seal framework (7).