Double-lever seven-section telescopic boom of crane

Abstract

The invention relates to the technical field of crane booms, and discloses a double-lever seven-section telescopic boom of a crane. The double-lever seven-section telescopic boom comprises a telescopic coil cylinder I, a telescopic oil cylinder II, a one-section arm, a two-section arm, a three-section arm, a four-section arm, a five-section arm, a six-section arm, a seven-section arm, a four-section arm extending arm rope row, a four-section arm extending arm slide wheel group, a five-section arm extending arm rope row, a five-section arm extending arm slide wheel, a six-section arm extendingarm rope row, a six-section arm extending arm slide wheel group, a seven-section arm extending arm rope row, a seven-section arm extending arm slide wheel group, a seven-section arm retracting arm rope row, a six-section arm retracting arm rope row, a six-section arm retracting arm slide wheel group, a five-section arm retracting arm rope row, a five-section arm retracting arm slide wheel group, afour-section retracting arm rope row, and a four-section arm retracting arm slide wheel group. The double-level seven-section telescopic boom realizes synchronous extension and retraction of a seven-section boom assembly, is high in extension and retraction speed, has arm length up to 50 meters, has many arm length working conditions, is high in working efficiency, is low in processing and controlling technical difficulty, and improves operating height and operating amplitude of a medium-small-tonnage crane.

Description

technical field [0001] The invention relates to the technical field of crane booms, in particular to a double-bar seven-section telescopic boom of a crane. Background technique [0002] The telescopic boom is one of the core components of the telescopic boom crane, and the design of the boom directly affects the lifting performance of the crane. The telescopic mechanism is one of the core components for the telescopic boom to realize telescoping, and the different telescopic methods directly affect the lifting performance of the boom and even the whole vehicle. [0003] At present, there are two telescopic methods for the boom of the telescopic boom crane, one is the telescopic method using the traditional oil cylinder plus the cable, and the other is the telescopic method using the single cylinder lock pin. Due to the limited space inside the boom, too many oil cylinders cannot be arranged in the boom. Generally, only five-section telescopic booms can be stretched sequenti...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the technical problems that the traditional seven-section boom cannot be retracted synchronously, the technical difficulty and manufacturing cost are high, and the operation intensity and range are low, the present invention provides a double-bar seven-section telescopic boom for cranes.

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