Double-speed steering control system of loading machine

Abstract

The invention relates to steering control systems of loading machines and provides a double-speed steering control system of a loading machine in order to solve the problem of invariable steering circle number of a traditional loader steering system. The double-speed steering control system of the loading machine comprises a flow amplifying valve, a steering oil cylinder, a steering machine and asteering pump; the steering machine is a double-displacement steering machine comprising two metering motors; and a hydraulic control end of a hydraulic control reversing valve of the steering machinecommunicates with an oil tank loop or a pump port of the steering pump through a two-position three-way valve. In the double-speed steering control system of the loading machine, the two-position three-way valve can be controlled, so that the first and second metering motors of the steering machine can work at the same time, and the steering machine outputs a higher flow; and in the steering process, the loading machine has a small steering circle number to realize quick steering, so that the efficiency is improved, and the labor intensity is reduced. Or through the two-position three-way valve, the hydraulic control end of the hydraulic control reversing valve of the steering machine communicates with the oil tank loop; and at this time, only one of the first and second metering motors of the steering machine participates in steering, so that the steering machine has a big steering circle number.

Description

technical field [0001] The invention relates to a steering control system, in particular to a two-speed steering control system for a loader. Background technique [0002] The steering hydraulic system is one of the most important systems in the loader, and the steering gear is one of the core hydraulic components in the steering system. The steering gear used in existing loaders usually includes a metering motor, the output displacement cannot be changed, and the steering system has more turning turns and is basically fixed. But the loader is mainly used for shovel loading operations. When the loader performs shoveling operations, its running trajectory is usually V-shaped, and the walking speed is not fast. Therefore, when the customer performs V-shaped shoveling operations, he hopes that the steering system has fewer turns to improve work efficiency and reduce labor costs. strength. When carrying out long-distance transportation operations, it is hoped that the steerin...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a two-speed steering control system for loaders aiming at the problem that the number of steering circles of the steering system of the existing loader is fixed.

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