Double-hydraulic-cylinder inhaul cable built-in adjustable telescopic arm for straight-arm crane

Abstract

The invention discloses a double-hydraulic-cylinder inhaul cable built-in adjustable telescopic arm for a straight-arm crane. The telescopic arm comprises a base arm, a first extension arm, a second extension arm and a third extension arm; the three extension arms are sequentially sleeved with the base arm; a cylinder rod of a first extension hydraulic cylinder is connected to the tail end of thebase arm; the cylinder rod of the first extension hydraulic cylinder is connected to the tail end of the first extension arm; a cylinder rod of a second extension hydraulic cylinder is connected to acylinder barrel of the first extension hydraulic cylinder; a cylinder barrel of the second extension hydraulic cylinder is connected to the tail portion of the second extension arm; the lower side ofa cylinder end of the first extension hydraulic cylinder is provided with a second half pulley and a first half pulley; extension pulleys are distributed on the two sides of a hydraulic end support ofthe second extension hydraulic cylinder; an extension inhaul cable adjusting mechanism is distributed in the cylinder end support; and the lower side of the third extension arm is provided with a third half-pulley, and the lower side in the end of the third extension arm is provided with an adjusting half-pulley. The lower side of the cylinder end of the first extension hydraulic cylinder is provided with the second half pulley and the first half pulley, the narrow space between the two hydraulic cylinders is fully used, and the vertical distance between the two hydraulic cylinders is reduced, so that the structure of an arm body is compact, and the space utilization rate in the arm body is high.

Description

technical field [0001] The invention relates to an adjustable telescopic arm with built-in dual hydraulic cylinders and drag cables for a straight-arm crane, which belongs to the technical field of truck-mounted cranes. Background technique [0002] The truck-mounted crane transport vehicle refers to a special-purpose vehicle equipped with a truck-mounted crane, which can realize the self-loading, unloading and transportation of goods. It not only has the transportation function of an ordinary truck, but also has the lifting and loading and unloading function of a crane. In addition to completing the loading and unloading of the cargo of the vehicle, it can also complete the loading and unloading of the cargo between vehicles; Transport vehicles can greatly improve transportation efficiency, reduce handling costs, reduce labor intensity, and ensure operational safety. Therefore, it is widely used in the unloading of goods, emergency rescue and long-distance transfer of good...

AI Technical Summary

Problems solved by technology

[0007] Aiming at the problems existing in the above-mentioned prior art, the present invention provides a telescopic arm with built-in adjustable double hydraulic cylinders and drag cables for straight arm cranes, which is used to solve the problem of complex nose structure and improve the lifting capacity and extension length of the arm head.

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