Hydraulic steering system

Abstract

The invention belongs to the technical field of steering control of vehicles, and relates to a hydraulic steering system. A front left steering oil cylinder and a front right steering oil cylinder are connected with a front steering knuckle arm; a rear left steering oil cylinder and a rear right steering oil cylinder are connected with a rear steering knuckle arm; a port P, a port T, a port Ls, a port R and a port L of a flow amplifier are connected with a port P, a port T, a port Ls, a port R and a port L of a hydraulic steering device respectively; a port PP and the port P of the flow amplifier are connected with each other; a port CR of the flow amplifier is connected to a port T of an electro-hydraulic steering valve; a port CL of the flow amplifier is connected with a large cavity of the front left steering oil cylinder and a small cavity of the front right steering oil cylinder; a port P of the electro-hydraulic steering valve is connected with a small cavity of the front left steering oil cylinder and a large cavity of the front right steering oil cylinder; a port A of the electro-hydraulic steering valve is connected with a large cavity of the rear left steering oil cylinder and a small cavity of the rear right steering oil cylinder; and a port B of the electro-hydraulic steering valve is connected with a small cavity of the rear left steering oil cylinder and a large cavity of the rear right steering oil cylinder. The hydraulic steering system has the advantages that the system has two interchangeable steering modes and is easy to operate.

Description

technical field [0001] The invention belongs to the technical field of vehicle steering control, and in particular relates to a hydraulic steering system, which is suitable for hydraulic steering control of multi-axis engineering vehicles. Background technique [0002] Traditional multi-axle vehicles (two-axle, three-axle and above) mainly adopt hydraulic independent steering system and hydraulic-mechanical pull-rod steering system. The steering of the vehicle is realized by steering the steering gear through the steering wheel to drive the steering cylinder. The hydraulic independent steering method has many steering modes, which can realize turning in situ and has a small turning radius, but each wheel needs to be driven by an independent oil cylinder, the control method is complicated, and there are many fault points, which are prone to danger when the vehicle is running at high speed; hydraulic mechanical pull rods are used The steering vehicle uses two sets of steering ...

AI Technical Summary

Problems solved by technology

The hydraulic independent steering method has many steering modes, which can realize turning in situ and has a small turning radius, but each wheel needs to be driven by an independent oil cylinder, the control method is complicated, and there are many fault points, which are prone to danger when the vehicle is running at high speed; hydraulic mechanical pull rods are used The steering vehicle uses two sets of steering oil cylinders at the front and rear to drive the front and rear axles of the vehicle to steer respectively. The figure-of-eight steering mode is used when driving, the turning radius is small, and the control system is simple, but there is a single steering mode. Easy to go in a straight line, the driving performance of the vehicle is not good

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