Synchronous drive control system and engineering machinery

Abstract

The invention relates to the technical field of engineering machinery, and discloses a synchronous drive control system, which comprises a hydraulic pump, a change valve, and a first double rod cylinder and a second double rod cylinder which have the same capacity. The oil inlet of the hydraulic pump is communicated with an oil tank, while the oil outlet is communicated with the oil inlet of the change valve; the first oil outlet of the change valve is communicated with a left cavity of the first double rod cylinder; a right cavity of the first double rod cylinder is communicated with a left cavity of the second double rod cylinder; a right cavity of the second double rod cylinder is communicated with the second oil outlet of the change valve; and the return port of the change valve is communicated with the oil tank. The synchronous drive control system can realize synchronous action of two cylinders, and has the advantages of simple structure, small influence by external load and low cost. The invention also discloses engineering machinery provided with the synchronous drive control system.

Description

technical field [0001] The present invention relates to the technical field of construction machinery, in particular to a synchronous drive control system, and also relates to a construction machine with the aforementioned synchronous drive control system. Background technique [0002] In the field of construction machinery, the synchronous action of two different mechanical parts is usually realized by a synchronous drive control system. The synchronous drive control system generally includes two oil cylinders. The two oil cylinders are respectively connected to the mechanical parts that need to be synchronized. The oil pump and the control system drive the two oil cylinders to perform synchronous expansion and contraction, so as to realize the synchronous action of the two mechanical parts. [0003] In the prior art, the synchronous drive control system usually uses two parallel hydraulic cylinders, and the hydraulic pump supplies oil to the two hydraulic cylinders at the ...

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Problems solved by technology

[0003] In the prior art, the synchronous drive control system usually uses two parallel hydraulic cylinders, and the hydraulic pump supplies oil to the two hydraulic cylinders at the same time. In order to realize the synchronous action of the two hydraulic cylinders, the servo closed-loop feedback system is usually used for control. The structure of the closed-loop feedback system is complex, it is greatly affected by external loads, the synchronization accuracy is relatively low, and the cost is relatively high

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