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Power steering gear valve body

A power steering gear and valve body technology, applied in the direction of fluid steering mechanism, etc., can solve the problems of system pressure rise and affect the operating feel, etc., and achieve the effect of reducing hydraulic noise and soft feel

Active Publication Date: 2013-01-30
CHERY AUTOMOBILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention designs a power steering valve body, which solves the technical problem that the valve port on the existing power steering valve body is in the process of closing, the valve port suddenly decreases and closes, causing the system pressure to rise sharply, and generate Strong pressure fluctuations cause hydraulic noise, which indirectly affects the operating feel

Method used

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Examples

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Embodiment Construction

[0022] Combine below Figure 5 and Figure 6 , the present invention is further described:

[0023] Such as Figure 5 As shown, a power steering valve body includes a valve body 1, and a plurality of valve ports 2 are arranged on the valve body 1. During the closing process, the change process of the opening area of ​​valve port 2 from maximum to zero is gradual and continuous.

[0024] The arc shape of the valve port 2 is arranged symmetrically on both sides of the central axis section of the valve body 1 .

[0025] The arc shape of the valve port 2 can be ellipse, circle or shuttle.

[0026] The valve port of the valve body is designed in a specific arc shape, and the size of the valve port is always kept continuous during the closing stage of the rotary valve without sudden changes. Therefore, the hydraulic shock when the valve port changes and closes is minimized, and the handle is soft.

[0027] Such as Figure 6 As shown, the force characteristic curve of the pres...

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Abstract

The invention relates to a power steering gear valve body, comprising a valve body (1), wherein a plurality of valve ports (2) are arranged on the valve body (1), the opening forms of the valve ports (2) are of arc transition shapes, and the process that the plurality of valve ports (2) are closed from the middle to two sides ensures that the changing process of the opening areas of the valve ports (2) from the maximum to zero is progressive and continuous. In the invention, because the opening forms of the valve ports are set into arc transition shapes, the arc transition shapes ensure that the pressure generated during valve port closing is slowly reduced in natural transition, thereby effectively reducing hydraulic noises generated due to hydraulic fluctuation, and a force characteristic curve of the valve body is parabolic, soft in hand feel and free of transition binding points, therefore, the requirement on higher steering control feel is met.

Description

technical field [0001] The invention relates to a valve body structure of a hydraulic steering gear. Background technique [0002] The power steering gear is powered by the closing of the valve port of the rotary valve to work. [0003] The valve port of the traditional power steering valve body is a single valve port or two rectangular valve ports, one large and one small, such as figure 1 As shown, when the power steering gear is working, the valve port 2 of the single-valve steering gear 1 suddenly decreases and closes, causing the system pressure to rise sharply, resulting in strong pressure fluctuations and hydraulic noise. figure 2 As shown, the force characteristic curve rises sharply, and the hand feeling changes too obviously. [0004] Such as image 3 As shown, the double valve port steering gear 1 adds a small valve port as a transition process, which reduces the hydraulic shock during the closing process and improves the hydraulic noise effect; Figure 4 As ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B62D5/08
Inventor 许挺沈岱武刘耀
Owner CHERY AUTOMOBILE CO LTD
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