Title:
ELECTRIC POWER STEERING DEVICE
Document Type and Number:
WIPO Patent Application WO/2004/052712
Kind Code:
A1
Abstract:
A minute gap is formed between a worm shaft (3) and a second bearing (20). The worm shaft (3) reliably inclines (swings) relative to an inner ring (20a) of the second bearing (20) during preloading by a torsion spring (14). A circumferential groove (40) of at least part of the minute gap is provided with an elastic body (41). The worm shaft (3) and the inner ring (20a) of the second bearing (20) are not in contact with each other, so that a metallic hitting noise is prevented from being produced by both in the minute gap. The minute gap between the worm shaft (3) and the inner ring (20a) of the second bearing (20) can be set larger by forming a ridge portion (3b) on axially both sides or one side of the circumferential groove (40). This makes the swingable range of the worm shaft (3) larger.
Inventors:
SEGAWA TORU (JP)
Application Number:
PCT/JP2003/015710
Publication Date:
June 24, 2004
Filing Date:
December 09, 2003
Export Citation:
Assignee:
NSK LTD (JP)
SEGAWA TORU (JP)
SEGAWA TORU (JP)
International Classes:
B62D5/04; F16C19/54; F16C27/06; F16C35/073; F16H1/16; (IPC1-7): B62D5/04; F16C35/07; F16C19/06
Foreign References:
| JP2002021943A | 2002-01-23 | |||
| JPH1143062A | 1999-02-16 | |||
| DE4139984A1 | 1993-06-09 | |||
| JP2003261041A | 2003-09-16 |
Other References:
See also references of EP 1571067A4
Attorney, Agent or Firm:
Inoue, Yoshio (1-4 Nihonbashi 3-chom, Chuo-ku Tokyo, JP)
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