Longitudinal single swing link type carrying pin mobile mechanism for crane

Abstract

The invention discloses a longitudinal single pendulum bearing pin insert-draw mechanism for cranes, which includes a bearing pin (12) and an expansion oil cylinder (13); a pin drawing plate (1) is fixed on the bearing pin (12); the expansion oil cylinder (13) is provided with a wedge-shaped slider (5) and a guide rail (6) thereof as well as a power oil cylinder (9) driving the wedge-shaped slider (5) to have reciprocating movement and a spring reset mechanism; a support (4) is fixed on the top of the expansion oil cylinder (13); a swing rod (2) is hinged with the support (4) and is provided with a torsion spring (3); one end of the swing rod (2) is drivingly connected with the pin drawing plate (1) and the other end is corresponding with the wedge-shaped slider (5). The invention is a longitudinal single pendulum bearing 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 series products of large-tonnage crane.

Description

technical field [0001] The invention mainly relates to the field of cranes, in particular to a longitudinal single-sway bar type load-bearing 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 the telescopic pin plug-in mechanism, the load-bearing pin plug-in mechanism and the interlocking mechanism of the two. The tail of the first telescopic arm extends the pin to realize the mutual connection between the moving end of the telescopic oil cylinder and the first telescopic arm; The arm is connected to the basic a...

AI Technical Summary

Problems solved by technology

[0004] Judging from the working process of the above bolt mechanism, the insertion and extraction device of the bearing pin moves more 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 movement.

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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