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Telescopic shaft for motor vehicle steering

A steering shaft and telescopic shaft technology, applied in the steering column, steering control mounted on the car, steering control, etc., can solve the problems of increased sliding resistance, peeling or wear, unevenness, etc., and prevent the sliding resistance from increasing. Or wear, prevent play, stabilize sliding load effects

Inactive Publication Date: 2006-03-01
NSK LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, according to Japanese Patent Application Laid-Open No. 2001-50293 or German Patent DE No. 3730393C2 as mentioned above, since the spherical body is in point contact with the track surface of the axial groove of the female or male shaft, when torque is applied When the load is applied, if the contact pressure between them becomes too large, there is a fear that indentations may be produced on the raceway surface of the axial groove in point contact with the spherical body
[0011] In this case, the sliding resistance becomes large or uneven due to the indentation on the raceway surface of the axial groove
In addition, indentation may also cause damage such as peeling or abrasion due to stress concentration

Method used

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  • Telescopic shaft for motor vehicle steering
  • Telescopic shaft for motor vehicle steering
  • Telescopic shaft for motor vehicle steering

Examples

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no. 1 example

[0036] FIG. 1A is a side view and FIG. 1B is a perspective view of a telescopic shaft for vehicle steering according to a first embodiment of the present invention. figure 2 It is a cross-sectional view along the line A-A in FIG. 1A.

[0037] As shown in FIGS. 1A and 1B , a telescopic shaft for vehicle steering (hereinafter referred to as "telescopic shaft") includes a male shaft 1 and a female shaft 2 that are mutually non-rotatable but mutually slidable and fitted together.

[0038] Such as figure 2 As shown, three substantially arc-shaped (arc-shaped) grooves 3 , 4 , 4 extending in the axial direction are arranged at equal intervals of 120° in the circumferential direction on the outer peripheral surface of the male shaft 1 . Correspondingly, three substantially arched grooves 5 , 6 , 6 extending in the axial direction are arranged at equal intervals of 120° along the circumferential direction on the inner peripheral surface of the female shaft 2 . The axial grooves 3, 5 ...

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PUM

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Abstract

Spherical members 7 are provided between plural pairs of axial grooves 3, 5 which are respectively formed on the outer peripheral surface of a male shaft 1 and on the inner peripheral surface of a female shaft 2, a leaf spring 9 for preload is interposed between the axial groove of the male shaft and the spherical member, and columnar members 8 are provided between another plural pairs of axial grooves 4, 6 which are respectively formed on the outer peripheral surface of the male shaft 1 and on the inner peripheral surface of the female shaft 2. Moreover, the radius of curvature of a transverse cross section of the axial groove 5 on the side of the female shaft 2 in which the spherical member 7 is rotated is set as 55% or less of the diameter of the spherical member 7.

Description

technical field [0001] The present invention relates to a telescoping shaft for vehicle steering which is installed in the steering shaft of a vehicle, and a male shaft and a female shaft cannot rotate with each other but are slidably fitted with each other. Background technique [0002] The telescopic shaft of the vehicle (automobile) steering mechanism needs to have the performance of absorbing the axial displacement generated when the vehicle is running and preventing such displacement or vibration from being transmitted to the steering wheel. In addition, the telescopic shaft also needs to have the function of moving and adjusting the position of the steering wheel in the axial direction, so as to obtain the best position for the driver to drive the vehicle. [0003] In any case, the telescoping shaft needs to reduce rattling noise, reduce play feeling of the steering wheel and reduce sliding resistance during sliding operation in the axial direction. [0004] Therefore...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B62D1/20F16D3/06B62D1/16B62D1/18B62D1/185F16C3/035
CPCB62D1/185F16C3/035B62D1/16F16D3/065F16C29/007F16C29/04F16C29/123F16C2326/24
Inventor 谷口雅人山田康久
Owner NSK LTD
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