Lazy arm protruded four-link steel wire rope telescoping mechanism

Abstract

The invention provides a lazy arm protruded four-link steel wire rope telescoping mechanism which comprises a large arm, a bi-arm, a tri-arm and a small arm, wherein one tri-arm protruded steel wire rope is wound on a four-link pulley, a tri-arm double-layer half-moon pulley arranged below the tail part of the tri-arm, a piston rod head half-moon pulley on a piston rod and a bi-link steel wire rope pulling plate, so as to finally form a four-link steel wire rope used for driving a telescopic arm. The lazy arm protruded four-link steel wire rope telescoping mechanism provided by the invention has the following advantages: 1, one steel wire rope is utilized to form the four-link steel wire rope according to a certain winding method, so that the steel wire rope is uniformly stressed, and the safety factor of the service life of the steel wire rope is improved; 2, two layers of half-moon pulleys are arranged below the tri-arm, so that the occupied space of the telescoping mechanism is saved to a greater extent; and 3, the four-link steel wire rope in the telescoping mechanism adopts one steel wire rope, so that the telescoping mechanism has increased telescopic oil cylinder movement space and less possibility of generating interference compared with the prior art.

Description

technical field [0001] The invention relates to engineering hoisting mechanical equipment, in particular to a three-arm extending four-connection wire rope telescopic mechanism in a boom. Background technique [0002] In the telescopic mechanism of four-section boom, five-section boom and more booms, generally the second arm is hinged with the telescopic oil cylinder to expand and contract together, and the third arm expands and contracts through steel wire ropes and pulley blocks. The forearm is stretched out through the extension of the three arms, the second arm and the telescopic oil cylinder are retracted together, the retraction of the third arm is driven by the retraction of the second arm, and the retraction of the forearm is driven by the retraction of the third arm. Due to the large pulling force of the three arms with load, four or more steel wire ropes are generally used. The four steel wire ropes are divided into four. In this way, four bolts are required to tig...

AI Technical Summary

Problems solved by technology

Due to the large pulling force of the three arms with load, four or more steel wire ropes are generally used. The four steel wire ropes are divided into four. In this way, four bolts are required to tighten the four steel wire ropes. It is difficult to make the steel wire ropes evenly stressed after assembly. , the safety factor of the wire rope life is greatly reduced; and because the telescopic oil cylinder moves inside the arm, the movement space is small, and it is easy to interfere

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