Hydraulic locking oil way, engineering machinery hydraulic system and control method thereof

Abstract

The invention provides a hydraulic locking oil way, an engineering machinery hydraulic system and a control method thereof, and belongs to the technical field of engineering machinery. The hydraulic locking oil way includes an oil inlet path P, an oil return path T, a handle hydraulic assembly and an electromagnetic valve, wherein an oil inlet of the handle hydraulic assembly is in communication with the oil inlet path P; an oil return port of the handle hydraulic assembly is in communication with the oil return path T; the electromagnetic valve is arranged on the oil inlet path P; and the electromagnetic valve is used for controlling the circulation of hydraulic oil in the oil inlet path P. The engineering machinery hydraulic system comprises the hydraulic locking oil way, an engineeringmachinery body, a controller and a locking device. The control method of the engineering machinery hydraulic system is applied to the engineering machinery hydraulic system. Whether the handle hydraulic assembly is effectively operated by the handle can be realized by controlling the on-off state of the electromagnetic valve, so that the occurrence of major accidents is avoided.

Description

technical field [0001] The invention relates to the technical field of construction machinery, in particular to a hydraulic locking oil circuit, a construction machinery hydraulic system and a control method thereof. Background technique [0002] Construction machinery such as loaders, backhoe loaders, and wheeled excavators are all designed with operating handles. The actions of the operating handles can realize the rotary movement of excavators and other construction machinery platforms, boom lifting, boom lowering, stick digging, and stick unloading. , Bucket digging, bucket unloading and other unrelated walking actions. [0003] At present, during the walking process of construction machinery, especially wheeled excavators and loaders, the walking speed is fast, and it is easy to trigger the operating handle and make it move. Since the operating handle is not locked, the corresponding control unit is controlled. Further action occurs, which is likely to cause accidents ...

AI Technical Summary

Problems solved by technology

[0003] At present, during the walking process of construction machinery, especially wheeled excavators and loaders, the walking speed is fast, and it is easy to trigger the operating handle and make it move. Since the operating handle is not locked, the corresponding control unit is controlled. Then there is movement, which is likely to cause accidents such as collisions and rollovers.

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