Hydraulic system for loading machine working device

Abstract

The invention relates to a loading machine hydraulic system, and provides a hydraulic system for a loading machine working device in order to solve the problem that an existing reverse six-connecting-rod working device is poor in lifting translational motion. The hydraulic system comprises a high-pressure oil source, an oil tank circuit, a pilot control device, an action detection device, a gesture detection device and a gesture adjusting valve, wherein the high-pressure oil source and the oil tank circuit are connected with a movable arm oil cylinder and a rotating bucket oil cylinder througha distribution valve, the pilot control device controls a movable arm to rise and fall and controls an accessory to turn forwards and backwards, the action detection device is used for obtaining thestate of operation action of the pilot control device, and the gesture detection device and the gesture adjusting valve are used for detecting gestures of the accessory. The gesture adjusting valve isconnected between the rotating bucket oil cylinder and the high-pressure oil source, when the action detection device only detects that the pilot control device has movable arm lifting operation action, and the gesture adjusting valve fills oil to a big cavity or a small cavity of the rotating bucket oil cylinder according to the accessory gesture detected through the gesture detection device toenable the accessory to be adjusted to the reference position. In the movable arm lifting process of the loading machine, oil is filled into the big cavity or the small cavity of the rotating bucket oil cylinder according to the accessory gesture, and therefore a bucket opening of the bucket is kept lifting steadily upwards.

Description

technical field [0001] The invention relates to a hydraulic system of a loader, more specifically, to a hydraulic system of a working device of a loader. Background technique [0002] Among the working devices of the loader, there are reverse six-link working devices and forward rotating eight-link working devices. The forward-rotating eight-link mechanism working device has better lifting and translation performance, large discharge angle and wide field of view, but the mechanism is complicated, the cost is high, and the load on the front axle is increased. The working device of the reverse six-bar linkage mechanism has a large transmission ratio, large breakout force, compact mechanism, relatively low cost, small front overhang, but relatively poor lifting and translation performance, and the working device of the reverse six-bar linkage mechanism is used for loading When the machine is used for shoveling loose materials and the unloading height is high, during the liftin...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a hydraulic system of a loader working device with stable lifting for the problem of poor lifting translation of the existing reverse six-link working device

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