Thin and long oil cylinder and engineering machine with same

Abstract

The invention provides a thin and long oil cylinder and an engineering machine with the same. The thin and long oil cylinder comprises a cylinder body, a piston rod, a piston assembly, a guiding sleeve and a shaft sleeve, wherein an installing cavity extending in the axial direction of the cylinder body and open in one end is defined in the cylinder body; the piston rod is movably arranged in the installing cavity in the axial direction of the cylinder body and one end of the piston rod stretches out of the installing cavity; the piston assembly is arranged in the installing cavity and arranged at the other end of the piston rod in a sleeving manner; the guiding sleeve is arranged at one end of the cylinder body and arranged on the piston rod in a sleeving manner, and the inner wall face of the end, towards a piston, of the guiding sleeve is provided with an annular installing groove; the shaft sleeve is arranged on the piston rod in a sleeving manner and installed in the installing groove; and the inner wall face of the shaft sleeve is provided with a spiral groove. According to the thin and long oil cylinder, the installing groove is defined in the guiding sleeve, the shaft sleeve is arranged in the installing groove, and the thin and long oil cylinder can guarantee the guiding performance and the lubricating stability of the piston rod, meets the requirement of ultra-long travel, and is simple in structure and convenient to machine.

Description

technical field [0001] The invention relates to the technical field of engineering machinery, in particular to an elongated oil cylinder and an engineering machinery with the same. Background technique [0002] Slender oil cylinders are often used on cranes, and the ratio of the stroke to the diameter of the piston rod is usually about 60, which means that the stroke is more than 60 times the diameter of the piston rod, or even longer. The design of this oil cylinder must fully consider the smooth operation of the oil cylinder and the reliability of the sealing system under such a long stroke. The typical feature of this kind of oil cylinder is that the specification of the oil cylinder is small, the rod diameter is only about 50mm, but the stroke is super long, about 4-5 meters. The longer the stroke of the oil cylinder, the easier the cylinder is to wear and bend, and the seals are also more likely to wear. In addition, the longer the stroke of the oil cylinder, the vario...

AI Technical Summary

Problems solved by technology

The typical feature of this kind of cylinder is that the specification of the cylinder is small, the rod diameter is only about 50mm, but the stroke is super long, about 4-5 meters

The longer the stroke of the oil cylinder, the easier it is for the cylinder to wear and bend, and the seals are also more likely to wear. In addition, the longer the stroke of the oil cylinder, the various internal structures of the oil cylinder need to be redesigned, and the processing cost is high.

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