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Steering device for vehicle

A control device and vehicle technology, which is applied to the steering control, steering column, steering mechanism and other directions installed on the vehicle, can solve the problems of torque sensor detection accuracy deterioration, bearing life impact, etc., to reduce dumping, save space, reduce The effect of manufacturing costs

Inactive Publication Date: 2013-08-28
JTEKT CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The occurrence of dumping will affect the bearing life
In addition, the detection accuracy of the torque sensor will also deteriorate

Method used

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  • Steering device for vehicle
  • Steering device for vehicle
  • Steering device for vehicle

Examples

Experimental program
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Embodiment Construction

[0020] Preferred embodiments of the present invention will be described with reference to the drawings.

[0021] figure 1 It is a schematic cross-sectional view of an electric power steering device 100 as a vehicle steering device according to an embodiment of the present invention. refer to figure 1 , the electric power steering apparatus 100 includes a steering shaft 2 for transmitting rotation of a steering wheel 1 serving as a steering member. The steering shaft 2 includes: a column shaft 4 rotatably supported by a steering column 3 serving as a support member fixed to the vehicle body B; an intermediate shaft 6 connected to the column shaft 4 via a universal joint 5; The gear shaft 8 is connected to the intermediate shaft 6 via the universal joint 7 .

[0022] In addition, the electric power steering apparatus 100 includes a steering mechanism A constituted by a rack and pinion mechanism including: the above-mentioned pinion shaft 8; 8a engages the rack 9a.

[0023] ...

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Abstract

A steering shaft (2) penetrating through a hollow support member (3) includes an upper shaft (14) and a lower shaft (15) which are coaxially connected through a torsion bar (16). A first ball bearing (33) retained by the support member (3) rotatably supports the upper end (141) of the upper shaft. A second ball bearing (34) retained by the support member (3) rotatably supports the lower shaft (15). A first inter-shaft bearing (36; 36A) retained by the lower shaft (15) rotatably supports the lower end (142) of the upper shaft (14). A second inter-shaft bearing (37; 37A) retained by the upper shaft (14) rotatably supports the upper end (151) of the lower shaft (15). The first inter-shaft bearing (36; 36A) includes a portion disposed inward radially of the bearing center (C1) of the second ball bearing (34). The first and second inter-shaft bearings (36, 37; 36A, 37A) are separated from each other in the direction (X1) of the axis of the steering shaft (2).

Description

technical field [0001] The present invention relates to a steering device for a vehicle. Background technique [0002] Generally, in an electric power steering device, a steering shaft is supported using a plurality of ball bearings. For example, in Patent Document 1, the steering shaft includes an upper shaft, an intermediate shaft rotatably coupled to the lower end of the upper shaft, and a lower shaft relatively rotatably coupled to the intermediate shaft via a torsion bar. [0003] The upper end of the upper shaft is supported by a first ball bearing. The intermediate shaft is supported by a second ball bearing. The lower shaft is supported by the third ball bearing and the fourth ball bearing on both sides of the worm wheel that rotates together with the lower shaft. In addition, a sleeve is disposed at a fitting portion where the intermediate shaft and the lower shaft are fitted. [0004] Patent Document 1: Japanese Patent Laid-Open No. 2003-341528 [0005] In Pat...

Claims

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Application Information

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IPC IPC(8): B62D5/04B62D1/16
CPCB62D1/16B62D6/10
Inventor 九郎丸善和
Owner JTEKT CORP
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