Shifting fork type telescopic pin mobile mechanism for crane

Abstract

The invention discloses a shifting fork type expansion pin insert-draw mechanism for cranes, which includes an expansion oil cylinder (15) and a main body (3) fixed on the cylinder tube of the expansion oil cylinder (15) as well as an expansion pin (1); the cylinder tube of the expansion oil cylinder (15) is provided with a guide rail (6) and a power oil cylinder (10); the guide rail (6) is provided with a slider (7) capable of sliding relatively to the guide rail (6); the slider (7) is drivingly connected with the piston rod of the power oil cylinder (10) and is provided with a spring reset mechanism; the middle part of a shifting fork plate (4) is hinged with the main body (3); one end of the shifting fork plate (4) is hinged with the expansion pin (1), and the other end slides and transmits correspondingly to an inclined trough (14) on the slider (7); the main body (3) is provided with a guiding slot (13) guiding correspondingly with the expansion pin (1). The invention is a shifting fork type expansion pin insert-draw mechanism for cranes which has the advantages of simple and compacted structure, convenience in installation and maintenance, stable and reliable performance, and the improved efficiency of the complete machine. Different from any other products, the invention adopts a novel structure form, has advanced quality and is widely applicable in the series products of large-tonnage crane.

Description

technical field [0001] The invention mainly relates to the field of cranes, in particular to a fork type telescopic pin insertion and extraction mechanism for cranes. Background technique [0002] At present, the box-shaped main boom of large-tonnage and super-large-tonnage truck cranes at home and abroad generally adopts a single-cylinder latch telescopic mechanism. This type of telescopic mechanism is mainly composed of a latch mechanism, telescopic oil cylinder, bearing pin on the boom and other accessories. The latch mechanism is a key component of the telescopic mechanism. [0003] The latch mechanism is mainly composed of a telescopic pin insertion mechanism, a bearing pin insertion mechanism and their interlocking mechanism. The tail of a telescopic arm stretches out the pin to realize the mutual connection between the moving end of the telescopic oil cylinder and the first telescopic arm; Connected to the basic arm; 3. The bearing pin insertion mechanism pulls the ...

AI Technical Summary

Problems solved by technology

[0004] From the working process of the above bolt mechanism, the telescopic pin insertion device of the bolt mechanism moves frequently during the telescopic process of the boom, and the working conditions are complicated. It can be seen that the reliability and profitability of the mechanism play a key role in the telescopic action. effect

However, the existing various latch mechanisms at home and abroad have defects such as complex structure and shape, high processing precision requirements, high heat treatment requirements, difficult manufacturing, easy failure, and difficult maintenance.

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