Rack-and-pinion steering gear unit

A technology of rack and pinion and steering gear, which is applied in the direction of steering gear, mechanical steering gear, steering mechanism, etc., and can solve the problems of steering wheel operating force fluctuation, manufacturing error, and inability to properly maintain the meshing state of pinion teeth and rack teeth. , to achieve the effect of preventing the operating force and improving the response performance

Inactive Publication Date: 2013-01-23
NSK LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] In this structure, since the inclined surface of the rack shaft is biased in the axial direction of the rack shaft, the rack shaft may be inclined with respect to the axis.
In addition, there may be manufacturing errors between the respective tapered surfaces of the pressing rollers divided into two, or gaps may occur between the inner peripheral surface of the pressing roller and the outer peripheral surface of the s

Method used

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  • Rack-and-pinion steering gear unit
  • Rack-and-pinion steering gear unit
  • Rack-and-pinion steering gear unit

Examples

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Example Embodiment

[0045] [The first example of the embodiment of the present invention]

[0046] Figure 1 ~ Figure 2 The first example of the embodiment of the present invention is shown. The steering gear unit 6a of this example is attached to a frame not shown, such as a front subframe. figure 1 The upper part is the upper side of the vehicle body, figure 1 The bottom is the underside of the body, figure 1 The left and right direction is the width of the car body, figure 1 The direction orthogonal to the paper is the front and rear direction of the vehicle body. Including this example, the materials and the like of the components constituting the rack and pinion steering gear unit of the present invention are the same as those in the past unless otherwise specified.

[0047] A rack shaft 9a is embedded in the inner peripheral surface 24 of the main storage portion 12a of the housing 11a of the steering gear unit 6a so as to be displaceable in the vehicle width direction (axial direction of th...

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PUM

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Abstract

The present invention provides a rack-and-pinion steering gear unit whereby the operating force of a steering wheel or the operating assist force of an electric motor can be prevented from increasing, and whereby response can be improved in fine operations during forward travel and the like. A back surface (29) of a rack shaft (9) is elastically pressed toward a pinion shaft (5) by a pressing roller (34). The pressing roller (34) is rotatably supported, via a radial needle bearing (16a), on a support shaft (33) supported on and fixed to a holder (30). A thrust needle bearing (35) for bearing a thrust load applied by the pressing roller (34) is provided between an inner side surface of the holder (30) and two side surfaces of the pressing roller (34) in the axial direction.

Description

technical field [0001] The present invention relates to a rack and pinion steering unit constituting a steering device for applying a steering angle to steering wheels of an automobile, and more particularly to a rack and pinion steering unit using a rolling rack guide. Background technique [0002] As a mechanism for converting rotational motion input from a steering wheel into linear motion for applying a steering angle, a rack and pinion steering unit is used. Steering devices equipped with rack and pinion steering gear units are described in Japanese Patent Application Laid-Open No. 2009-184591, Japanese Patent Laid-Open No. 2004-17872, Japanese Patent Application Laid-Open No. 61-124471, etc., and conventionally widely known. [0003] Figure 7 An example of a steering device incorporating a rack and pinion steering unit is shown. This steering device is a so-called column assist type rack and pinion power steering device. That is, in order to reduce the operating fo...

Claims

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Application Information

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IPC IPC(8): B62D3/12F16H19/04
CPCB62D3/123F16H55/285Y10T74/18096
Inventor 天田慎也新井利幸
Owner NSK LTD
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