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A double-circuit semi-integral steering gear, steering assist system and crane

A semi-integral, power steering technology, used in fluid steering mechanisms, steering mechanisms, mechanical steering gears, etc., can solve problems such as poor handling feel and difficulty in steering assistance with large axle loads, reducing space occupancy and improving space. Utilization rate, the effect of optimizing the layout space

Active Publication Date: 2022-08-05
XUZHOU HEAVY MASCH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a double-circuit semi-integral steering gear, power steering system and crane to solve the problems of large axle load steering power difficulty and poor control feeling caused by single hydraulic power assist or electric power assist in the prior art

Method used

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  • A double-circuit semi-integral steering gear, steering assist system and crane
  • A double-circuit semi-integral steering gear, steering assist system and crane
  • A double-circuit semi-integral steering gear, steering assist system and crane

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Embodiment Construction

[0038]In order to make the technical means, creative features, achievement goals and effects realized by the present invention easy to understand, the present invention will be further described below with reference to the specific embodiments.

[0039] In the field of construction machinery, the pure electric power steering technology still cannot meet the large axle load steering requirements. Considering the improvement of driving comfort and safety, the purpose of the present invention is to provide an electric and hydraulic steering system during the steering process of construction machinery vehicles. The power assist works together, so that when the vehicle is steering at a low speed, the electric and hydraulic power assist work together to reduce the driver's operating force and driving intensity, so that the vehicle can actively return to positive, and improve the return of the vehicle; when the vehicle is turning at high speed, it can increase driving It is an electro...

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Abstract

The invention discloses a double-circuit semi-integrated steering gear, a steering assist system and a crane. The steering gear comprises a casing, an input shaft device and a steering screw rod. A piston is slidably connected in the casing, and the bottom surface teeth of the piston are connected with the teeth in the casing. The fan is meshed; the steering screw is threaded in the screw hole of the piston, one end of the input shaft device is connected with one end of the steering screw, the other end of the input shaft device is located outside the casing, and the input shaft device located in the casing is connected to the reduction gear. The deceleration device is connected to an external motor; the torque sensor is connected to the input shaft device or integrated outside the input shaft to obtain the torque signal of the steering wheel, and the motor transmits the electric assist torque to the steering screw according to the torque signal of the steering wheel and the speed signal of the vehicle; this application It can meet the steering assistance of large axle load and solve the problem of poor handling feeling.

Description

technical field [0001] The invention relates to the technical field of crane steering gears, in particular to a double-circuit semi-integrated steering gear, a steering assist system and a crane. Background technique [0002] At present, the steering gear used in the steering assist system of the hoisting vehicle chassis is mainly a hydraulic power steering gear, which adopts a combination of mechanical steering control and hydraulic power assist, which can realize the function of hydraulic power assist to provide auxiliary power for steering, so that the steering operation of the vehicle is relatively Compared with mechanical steering, it is lighter, reduces the driver's driving intensity, and improves the steering control of the vehicle. [0003] There are two main types of hydraulic power steering gears currently in use, namely rotary valve type integral steering gear and spool valve type semi-integral steering gear. It can be divided into two structural forms: single-ci...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B62D3/02B62D3/10B62D5/04B62D5/065B62D6/00B62D119/00B62D113/00
CPCB62D3/02B62D3/10B62D5/0463B62D5/065B62D6/00
Inventor 杨凤玲曹光光马云旺赵留福郝宇刘桂昌张小江
Owner XUZHOU HEAVY MASCH CO LTD
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