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A rotary valve type semi-integral steering gear

A semi-integrated steering gear technology, which is applied in the direction of fluid steering mechanism, steering mechanism, power steering mechanism, etc. promotion and other issues, to achieve the effect of smooth movement, improved handling sensitivity, and improved driving comfort

Active Publication Date: 2021-11-23
XUZHOU HEAVY MASCH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the distance between the output drop arm of the steering gear of the actual vehicle and the front axle is relatively long, and the length of the tie rod that needs to be connected with the drop arm is relatively long. At the same time, due to space layout problems, the tie rod connected with the drop arm is sometimes required to be a curved rod. Application and popularization of valve type integral steering gear

Method used

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  • A rotary valve type semi-integral steering gear
  • A rotary valve type semi-integral steering gear
  • A rotary valve type semi-integral steering gear

Examples

Experimental program
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Embodiment 2

[0037] Such as Figure 3~4An embodiment shown: this embodiment provides a double-circuit rotary valve type semi-integral steering gear, the steering gear 1 includes a closed casing 11, a screw assembly arranged in the casing 11 and connected to the steering wheel A gear fan 19 that rotates under the drive of the screw assembly, the screw assembly also includes a piston 12 that divides the inner cavity of the housing 11 into a first chamber 1a and a second chamber 1b, the first A first reversing valve and a second reversing valve are arranged in the chamber 1a. The two reversing valves are integrally formed, and the spools 16 of the two reversing valves are integrally formed. The axes of the two spools 16 are aligned with the screw assembly. The axes are coincident; the first and second reversing valves are respectively provided with one kind of input end and three kinds of output ends, the input ends of the two reversing valves are respectively connected with the first oil sup...

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Abstract

The invention discloses a rotary valve type semi-integral steering gear, which comprises a closed casing, a screw assembly arranged in the casing, and a tooth fan rotating under the drive of the screw assembly. The cavity is divided into the first chamber and the piston of the second chamber. At least one reversing valve is arranged in the first chamber. The reversing valve is driven by the screw assembly to reversing. The oil chambers on both sides are connected; the second oil passage is opened on the reversing valve, so that the oil chambers on both sides of the piston are connected with the oil return port. The present invention cancels the channel connecting the valve core to the oil cavity on both sides of the piston, and adds an oil channel on the piston to connect the oil cavity on both sides of the piston to realize the function of a semi-integral steering device; at the same time, an oil channel is added to the valve core or the valve body, Make the steering valve piston move smoothly, further reduce the correction amount of the steering wheel when the vehicle is driving straight, improve the steering sensitivity, and improve the driving comfort of the vehicle.

Description

technical field [0001] The invention discloses a rotary valve type semi-integral steering gear and relates to the technical field of steering gears. Background technique [0002] At present, there are two types of hydraulic power steering gears used in crane steering systems: rotary valve type integral steering gear and slide valve type semi-integral steering gear. Both rotary valve type integral steering gear and valve type semi-integral steering gear include single circuit and double circuit. The steering drop arm of the integral steering gear has relatively large torque output, which can reduce the number of steering cylinders in the vehicle steering system, but requires relatively high strength and stability of the tie rod connected to the steering drop arm. This tie rod is generally short and straight. . The steering drop arm of the semi-integral steering gear has almost no torque output. The number of steering cylinders in the steering system of the vehicle is more t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B62D5/20B62D5/06B62D5/083
CPCB62D5/06B62D5/083B62D5/20
Inventor 丁宏刚曹光光马云旺杨凤玲张小江郝宇
Owner XUZHOU HEAVY MASCH CO LTD
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