Vehicle and hydraulic steering driving system

Abstract

The invention discloses a vehicle and a hydraulic steering driving system. The disclosed hydraulic steering driving system comprises a centering oil cylinder, as well as a centering control single valve and first hydraulic control one-way valves, wherein a rod cavity and a rodless cavity of the centering oil cylinder are communicated with a free oil outlet of each first hydraulic control one-way valve; a middle cavity is communicated with a hydraulic oil tank; a free oil inlet of each first hydraulic control one-way valve is communicated with a working oil port; each control port is communicated with the other working oil port; and the centering control single valve has two states, so that the communication and the disconnection between the two working oil ports and the oil inlet and between the two working oil ports and an oil return port can be controlled. In the hydraulic steering driving system provided by the invention, the quantity of hydraulic control valves is small, so that the structures of an oil passage and a circuit can be further simplified, and the reliability of the hydraulic steering driving system is improved; and in addition, since the quantity of the hydraulic control valves is small, the coordination control on the hydraulic steering driving system also can be facilitated, and the reliability and the sensitivity are improved.

Description

technical field [0001] The invention relates to a vehicle steering technology, in particular to a hydraulic steering drive system, and also to a vehicle including the hydraulic steering drive system. Background technique [0002] Currently, various vehicles are generally provided with a steering mechanism and a steering drive mechanism that provides steering power for the steering mechanism. In engineering vehicles, in order to facilitate the steering operation, a power steering system is also provided. With the development of large-scale engineering vehicles, the number of axles of wheeled engineering vehicles is increasing, and the body is getting longer and longer. It becomes very difficult to turn the vehicle on a narrow construction site. Therefore, the all-wheel steering system came into being Health, that is, each axle of the vehicle is provided with a steering mechanism and a steering drive mechanism that provides steering power for the steering mechanism. [0003]...

AI Technical Summary

Problems solved by technology

On the one hand, this makes the oil circuit of the hydraulic steering drive system very complicated; when the vehicle includes a plurality of steering axles, and each steering axle is provided with a corresponding steering control valve and centering control valve group, it will make the hydraulic steering drive system of the vehicle The pipeline structure is very complicated; this is not only not conducive to the assembly of the hydraulic steering drive system, but also affects the reliability of the hydraulic steering drive system; on the other hand, it increases the difficulty of coordinated control of multiple centering control valves, making the hydraulic steering drive system reduced reliability

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