Telescopic operating arm of high-altitude operation car and hydraulic circuit of telescopic operating arm

Abstract

The invention discloses a telescopic operating arm of a high-altitude operation car. The telescopic operating arm comprises a big arm, a second arm is arranged in the big arm, a small arm is arranged in the second arm, and a telescoping hydraulic cylinder is arranged between the bottom of a cavity of the big arm and the second arm. The invention further discloses a hydraulic circuit of the telescopic operating arm of the high-altitude operation car. An outlet of a difference sensing valve is communicated with a port P of an electromagnetic reversing valve I, a port R of the electromagnetic reversing valve I is communicated with a rodless cavity of the telescoping hydraulic cylinder, and a port W of an electromagnetic reversing valve II is communicated with a rod cavity of the telescoping hydraulic cylinder. Double balance valves are arranged in parallel on pipelines of the rodless cavity and the rod cavity of the telescoping hydraulic cylinder. The telescopic operating arm has the advantages that the telescopic operating arm is reasonable in design, smooth in movement, free of rigid impact, high in working altitude, high in telescoping speed, obvious in energy conservation effect, small in retracted size, wide in application range, low in production cost and convenient to popularize and use.

Description

technical field [0001] The invention belongs to the technical field of construction machinery and relates to a mechanical operating arm, in particular to a telescopic operating arm of an aerial work vehicle and a hydraulic circuit thereof. Background technique [0002] Aerial work vehicle is an advanced and special special aerial work machine that transports staff, work tools, etc. to a designated aerial location through a work platform for installation, maintenance and other operations. The aerial work vehicle is not only a special vehicle, but also belongs to construction machinery, and is a very important aerial construction equipment. At present, in China, the operating arms of aerial work vehicles mostly use folding arms. The folding arms are bulky and heavy, and it is difficult to adapt to the operating needs of some relatively narrow places in the city. Contents of the invention [0003] The object of the present invention is to overcome the deficiencies in the abo...

AI Technical Summary

Problems solved by technology

At present, the working arms of aerial work vehicles in China mostly use folding arms. The folding arms are bulky and heavy, and it is difficult to adapt to the operating needs of some relatively narrow places in the city.

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