Multi-stage hydraulic oil cylinder with improved structure

Abstract

A multi-stage hydraulic oil cylinder with an improved structure comprises oil cylinder retraction and limiting components, oil cylinder tail end guide rings, oil cylinder lifting limiting components, oil cylinder sealing rings, oil cylinder front end guide rings and dustproof rings. The oil cylinder retraction and limiting components, the oil cylinder tail end guide rings, the oil cylinder lifting limiting components, the oil cylinder sealing rings, the oil cylinder front end guide rings and the dustproof rings are arranged between outer circles of outer oil cylinder bodies and outer circles of oil cylinder bodies of next stages. Each oil cylinder retraction and limiting component is composed of two steel wire check rings, one steel wire check ring of each oil cylinder retraction and limiting component is fixed in an inner annular groove in the tail end of the corresponding outer oil cylinder body, and the other steel wire check ring of each oil cylinder retraction and limiting component is fixed in an outer annular groove in the tail end of the oil cylinder body of the next stage. When the oil cylinder bodies retract and are limited, the two corresponding steel wire check rings are in contact for limiting, and the steel wire check rings are made of 65Mn materials. The oil cylinder tail end guide rings and the oil cylinder front end guide rings are made of polyurethane materials. The oil cylinder sealing rings are double-lip sealing rings made of polycaprolactone materials. The dustproof rings are double-lip dustproof rings made of polyurethane materials. The limiting, guiding and sealing structure of the multi-stage hydraulic oil cylinder is improved, and the work performance of the multi-stage hydraulic oil cylinder is superior to that of an existing multi-stage hydraulic oil cylinder.

Description

technical field [0001] The invention relates to a multistage hydraulic oil cylinder, in particular to a multistage hydraulic oil cylinder with improved structure. Background technique [0002] At present, a multi-stage hydraulic cylinder is mainly composed of a cylinder body, a cylinder head, a hinge shaft and a multi-stage inner cylinder barrel; an oil cylinder retraction limit assembly, The guide ring at the end of the oil cylinder, the lifting limit assembly of the oil cylinder, the sealing ring of the oil cylinder, the guide ring at the front end of the oil cylinder and the dustproof ring; [0003] The cylinder retraction limit assembly is composed of two retaining rings. The retaining ring with a rectangular cross section causes the multi-stage hydraulic cylinder to shrink and return after working, and the contact surface will appear edged and pulled, causing damage to the inner and outer circular surfaces of each stage of hydraulic cylinder. The problem; [0004] The...

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Problems solved by technology

[0008] The invention provides a multi-stage hydraulic cylinder with improved structure, the purpose of which is to improve the existing multi-stage hydraulic cylinder limit, guide and sealing structure, prevent the problem of cylinder pulling when the hydraulic cylinder is working, and improve the service life of the multi-stage hydraulic cylinder and stability at work

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