Buckling type seal structure of cross axle cardan joint

Abstract

The invention discloses a buckling type seal structure of a cross axle cardan joint, which comprises an outer loop, a seal ring and a dust cover, wherein the seal ring comprises a seal ring framework and a seal lip, one end of the seal ring framework is bent inwards and connected with the seal lip into a whole, the other end of the seal ring framework is turned outwards to form a hook ring, an annular groove is arranged between the seal lip and the seal ring framework, a pre-tightening groove is arranged on the side wall of the annular groove at the side of the seal lip, a pre-tightening spring of an annular structure is arranged in the pre-tightening groove, the dust cover is an annular body the cross section of which is of a U-shaped structure, the inner annular body of the dust cover is attached with the cross axle cardan joint, an internally protruding snap ring is arranged on the inner wall of the outer ring body and is buckled with the hook ring. The problem that the insufficient wear service life of the seal material of the cross axle cardan joint results in the decline of the seal property of the cardan joint is solved. The invention has the advantages of unique design, compact structure, convenience for installation and low production cost. The seal property of the cardan joint can be effectively improved, and the use period of the cardan joint can be prolonged.

Description

technical field

[0001] The invention relates to a cross shaft universal joint, in particular to a cross shaft universal joint buckle-type sealing structure with good sealing effect and long service life. Background technique

[0002] Most of the sealing structures of the cross shaft universal joints in the prior art are provided with a sealing ring at the open end of the outer ring of the cross shaft universal joint, and a sealing lip is provided on the sealing ring, and the sealing lip is in close contact with the journal of the cross shaft universal joint. Combined to achieve the purpose of sealing the bearing end of the cross shaft universal joint. At the same time, in order to prevent sand, dust, etc. from invading the inside of the universal joint during the use of the car, the sealing structure of the cross shaft universal joint in the prior art is also provided with a dust cover, between the journal and the outer ring of the cross shaft universal joint form a closed ...

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