Cardan joint capable of compensating abrasion of sealing device

Abstract

The invention discloses a cardan joint capable of compensating abrasion of a sealing device. The cardan joint capable of compensating the abrasion of the sealing device can automatically conduct compensation after a lip of an oil seal ring is abraded, is good in sealing performance and is provided with a dust guard which is good in waterproof effect and sand-proof effect. The cardan joint comprises a shaft neck, a bearing, a roller pin, the oil seal ring and the dust guard. The bearing is installed on the shaft head of the shaft neck, the roller pin is installed in the bearing, the oil seal ring is installed at the outer end of the roller pin in the bearing, an outer bending ring (16) of the dust guard is connected with the bearing, an inner bending ring (22) of the dust guard is connected with the shaft head, the section of the oil seal ring is in a U shape, a lip of an outwards-protruded arc-shaped edge (5) is arranged on the outer side wall of a semiarc (1) in the oil seal ring, a balance skeleton (37) is embedded in an oil seal ring soft body (10) of the tail end of the semiarc (1) in the oil seal ring, a spring ring (2) is clamped on the inner side wall of the semiarc in the oil seal ring, and an elastic ball (33) is clamped in a U-shaped groove (38) in the oil seal ring. The cardan joint is mainly used in the manufacturing technology.

Description

technical field [0001] The invention relates to the technical field of production and manufacture of universal joints, in particular to a universal joint capable of compensating for wear of a sealing device. Background technique [0002] The existing conventional universal joints are generally composed of bearings, journals, needle rollers, and dust-proof covers. Due to the poor sealing and dust-proof effect of the universal joints designed according to the traditional structure, sand and water are easy to invade the universal joint during use. Inside the knuckle bearing, the main lip of the bearing oil seal is easy to wear, causing the grease to leak, so that the universal joint will cause dry grinding of the bearing and premature failure due to oil leakage. However, the existing dust cover is easy to fall off and break during assembly, resulting in shortened product life of the universal joint. [0003] Chinese Patent Authorization Publication No. CN 2888168Y, dated April...

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve the problem that the existing universal joint oil seal is easy to wear, the main lip and auxiliary lip of the oil seal ring cannot be compensated after wear, and the needle roller is easy to move axially to push out the oil seal, resulting in the leakage of lubricating grease in the bearing, resulting in Due to dry grinding of the bearings, the sealing effect is lost, and the dust cover is easy to fall off during assembly, and the waterproof and sandproof effect of the dust cover is not ideal. To provide a main lip of the oil seal ring that is not easy to wear, after the main lip of the oil seal ring is worn Capable of automatic compensation, good sealing performance, good sealing ring stability, no grease leakage, dust cover is not easy to fall off after assembly, and the dust cover has good waterproof and sandproof effect. A universal joint that can compensate for the wear of the sealing device

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