Back-tilting preventive device for boom, control method of back-tilting preventive device for boom, and crawler crane

Abstract

The invention provides a back-tilting preventive device for a boom, a control method of the back-tilting preventive device for the boom, and a crawler crane. The back-tilting preventive device for the boom comprises a variable damper (10), a sensor (20) and a processing system (30), wherein the variable damper (10) is arranged between the boom (40) and a base, the sensor (20) is arranged on the boom (40) and comprises a displacement sensor, an angle sensor and a speed sensor, and the processing system (30) is respectively connected to the sensor (20) and the variable damper (10) to obtain driving signals required by the variable damper (10) for controlling the boom (40) to move according to boom parameters detected by the sensor (20), and to transmit the driving signals to the variable damper (10). By means of the back-tilting preventive device for the boom, negative moment during operation of the boom can be effectively reduced, the boom can be well buffered and protected, and stability in operation of a boom system can be guaranteed.

Description

technical field [0001] The invention relates to the field of large-tonnage crawler cranes in the field of engineering machinery, in particular to a boom anti-tilt device, a control method thereof, and a crawler crane. Background technique [0002] Due to the structural characteristics of crawler cranes, and with the continuous development of large-scale crawler cranes, the length of the boom is getting longer and longer, and the working range is getting smaller and smaller, resulting in an increasing working angle of the boom (with the front horizontal plane) When the crane lifts the load, the center of gravity of the jib system moves forward, the jib will produce a certain deflection, and the pull plate and the wire rope will also have a certain deformation. In the case of sudden unloading or backward wind force, due to the elastic effect of the luffing system and the whole machine, there is a possibility of backward tilting accidents. Therefore, in the overall design of t...

AI Technical Summary

Problems solved by technology

[0007] Most of the existing large tonnage cranes in China use spring or hydraulic anti-backward devices. On the one hand, a large negative moment is generated when the jib is working normally; It will have a large impact on the boom, thereby reducing the service life of the boom and affecting its normal working performance

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