Hydraulic motor driving steering system based on full hydraulic steering device

A technology of hydraulic motor and steering system, applied in the field of steering system, can solve the problems of difficult layout and difficult realization, and achieve the effect of flexible layout

Inactive Publication Date: 2016-11-09
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when it is relatively difficult to arrange the full hydraulic steering gear under the cab, or long-distance st

Method used

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  • Hydraulic motor driving steering system based on full hydraulic steering device
  • Hydraulic motor driving steering system based on full hydraulic steering device
  • Hydraulic motor driving steering system based on full hydraulic steering device

Examples

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Embodiment 1

[0034] Example 1: figure 1 A schematic diagram of a hydraulic motor driven full hydraulic steering control system. The signal input device 31 is one of an electric control handle, an electronically controlled analog steering wheel, or a wireless transmission device. The driver forms a steering command signal through the signal input device 31, and the steering angle sensor 6 detects the rotation signal of the hydraulic motor 7. Two kinds of signals After being amplified by the speed controller 30, the control current is output to control the opening and closing of the electro-hydraulic servo valve 5, and the corresponding pressure oil is output to drive the hydraulic motor 7 to turn, forming a closed-loop control of the hydraulic motor speed. The hydraulic motor 7 drives the full hydraulic steering gear 20, the hydraulic pump 14 sucks hydraulic oil from the second oil tank 11, enters the full hydraulic steering gear 20 through the hydraulic hose 21, and then enters the left st...

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PUM

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Abstract

The invention relates to a hydraulic motor driving steering system based on a full hydraulic steering device. The hydraulic motor driving steering system comprises a terminal executing module, a full hydraulic steering device, a power module and an operation and control module. A driver operates a signal input device to form a steering instruction signal; a steering sensor measures a hydraulic motor rotating signal; after the two signals are compared and amplified through a rotary speed controller, control current is output and is used for controlling the switching-on/off of an electric-hydraulic servo valve; and corresponding pressure oil is output by a hydraulic pump to drive a hydraulic motor to steer, so as to form closed-ring control of a rotary speed of the hydraulic motor. The hydraulic motor drives the full hydraulic steering device and the hydraulic pump outputs certain quantity of hydraulic oil through the full hydraulic steering device to push a piston rod of an oil cylinder to retract and pull a steering arm connected with wheels, so that the wheels are turned and a vehicle is steered. Oil liquid power transmission and power cable signal transmission in the steering system are not limited to directions, and a hydraulic hose and a power cable, which realize oil liquid movement, have relatively good flexibility, so that a steering operation part and the full hydraulic steering device are arranged at different positions of the vehicle and remote or wireless operation of steering is realized.

Description

technical field [0001] The invention relates to a steering system of an off-highway vehicle, in particular to a hydraulic motor-driven steering system based on a full hydraulic steering gear. Background technique [0002] The full hydraulic steering gear is a cycloidal valve type steering gear composed of a follow-up rotary valve and a cycloidal stator pair. It is a fully hydraulic steering system composed of oil supply pump, overflow valve (or diverter valve), steering cylinder and other connecting accessories. It is widely used in low-speed agricultural machinery, garden machinery, road maintenance machinery, forestry machinery, engineering machinery and mining machinery. on heavy vehicles. [0003] The existing full hydraulic steering system relies on the driver to turn the steering wheel to provide rotational force. The steering wheel drives a long shaft, which is directly inserted into the steering column connected to the full hydraulic steering gear, and rotates toget...

Claims

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Application Information

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IPC IPC(8): B62D5/20B62D7/16B62D9/00B62D1/28
CPCB62D1/28B62D5/20B62D7/16B62D9/00
Inventor 米智楠徐扬吴仁智郭瑞琴卢志浩王凯
Owner TONGJI UNIV
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