Synchronous telescopic mechanism of truck-mounted crane

Abstract

The invention provides a synchronous telescopic mechanism of a truck-mounted crane. The synchronous telescopic mechanism comprises a basic arm, a first telescopic arm, a second telescopic arm, a thirdtelescopic arm, a multi-stage telescopic cylinder and a rope row mechanism, and the first telescopic arm, the second telescopic arm, the third telescopic arm, the multi-stage telescopic cylinder andthe rope row mechanism are sequentially connected into the basic arm in a sleeved manner; the rope row mechanism includes a first arm stretching rope assembly, a second arm stretching rope assembly, afirst arm shrinking rope assembly and a second arm shrinking rope assembly; the multi-stage telescopic cylinder includes a piston rod, a first-stage cylinder barrel, a two-stage cylinder barrel and abracket arranged at the end, far away from the first-stage cylinder barrel, of the two-stage cylinder barrel; and the first arm stretching rope assembly comprises a first arm stretching wheel and a first arm stretching rope, the second arm stretching rope assembly comprises a second arm stretching wheel and a second arm stretching rope, the first arm shrinking rope assembly comprises a first armshrinking wheel and a first arm shrinking rope, and the second arm shrinking rope assembly comprises a second arm shrinking wheel and a second arm shrinking rope. The synchronous telescopic mechanismhas the characteristics of being simple in structure and convenient to install.

Description

Technical field [0001] The invention relates to the field of engineering machinery, in particular to a synchronous telescopic mechanism of a truck-mounted crane. Background technique [0002] In the prior art, the synchronous telescopic mechanism of a four-section boom truck-mounted crane has two telescopic methods. One is to use a single-stage telescopic cylinder and multiple sets of rope assemblies for synchronous telescopic control, and the other is to use multiple single-stage telescopic cylinders. Synchronous control in a way. If a single-stage telescopic cylinder plus multiple sets of rope row components are used in a synchronous telescopic mechanism, the thrust of the single-stage telescopic cylinder is limited under heavy load conditions, and the four-section boom cannot be reliably synchronized; if multiple single-stage telescopes are used The hydraulic cylinders are used for synchronous control. Due to the limited space of the truck-mounted crane boom and high safety r...

AI Technical Summary

Problems solved by technology

If a synchronous telescopic mechanism with a single-stage telescopic cylinder plus multiple sets of rope row components is used, under heavy load conditions, the thrust of the single-stage telescopic cylinder is limited, and it is impossible to reliably realize the synchronous telescopic expansion of the four-section boom; Oil cylinders are used for synchronous control. Due to the limited space of the boom of the truck-mounted crane and high safety requirements, it is inconvenient to install multiple single-stage telescopic cylinders in the boom with limited space, and its own weight is too heavy, which is not convenient for the use of the truck-mounted crane.

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