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Double-loop semi-integral steering gear, power-assisted steering 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: 2021-07-23
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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  • Double-loop semi-integral steering gear, power-assisted steering system and crane
  • Double-loop semi-integral steering gear, power-assisted steering system and crane
  • Double-loop semi-integral steering gear, power-assisted steering system and crane

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Embodiment Construction

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

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

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Abstract

The invention discloses a double-loop semi-integral steering gear, a power-assisted steering system and a crane, the steering gear comprises a shell, an input shaft device and a steering screw, a piston is slidably connected in the shell, and bottom teeth of the piston are meshed with a sector in the shell; the steering screw rod is in threaded connection with the interior of a screw hole of the piston, one end of the input shaft device is connected with one end of the steering screw rod, the other end of the input shaft device is located outside the shell, the input shaft device located in the shell is connected with the speed reduction device, and the speed reduction device is connected with an external motor; the torque sensor is connected to the input shaft device or integrated outside an input shaft to obtain a torque signal of a steering wheel, and the motor transmits electric power torque to the steering screw according to the torque signal of the steering wheel and a vehicle speed signal of a vehicle. The double-loop semi-integral steering gear can meet the requirement for large-axle-load power-assisted steering, and the problem of poor control feeling is solved.

Description

technical field [0001] The invention relates to the technical field of a crane steering gear, in particular to a double-circuit semi-integral steering gear, a steering assist system and a crane. Background technique [0002] At present, the steering gear used in the power steering system of the chassis of a hoisting machinery vehicle is mainly a hydraulic power steering gear. Compared with mechanical steering, it is lighter, reduces the driving intensity of the driver, and improves the steering control of the vehicle. [0003] There are two main types of hydraulic power steering gear currently used, namely the rotary valve type integral steering gear and the slide valve type semi-integral steering gear. Both can be divided into two structural forms, single-circuit and double-circuit. The main purpose of distinguishing between the two structural forms is to achieve different power-assist characteristics, which are used to match lifting machinery vehicles with different axle ...

Claims

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Application Information

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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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