Title:
STEERING DEVICE USING BALL SCREW
Document Type and Number:
WIPO Patent Application WO/2008/069172
Kind Code:
A1
Abstract:
Provided is a steering device, which can be reduced in size and weight and which
can be easily adapted for a vehicle such as a front-wheel drive car having a narrow
engine room. The steering device is constituted to comprise a relay rod (3) rotatably
borne in a gear casing (5) and having a helical ball rolling groove formed therein,
an input shaft (20), to which the rotation of a steering shaft (2) is transmitted,
rotation transmitting means (21, 38 and 35) for converting the rotation of the
input shaft into the rotational motion of the relay rod and for allowing the axial
movement of the relay rod, a screw nut (36) threaded in the ball rolling groove
of the relay rod through a multiplicity of balls and fixed in the gear casing, thereby
to move the relay rod in the axial direction as the relay rod rotates, a pair of tie
rods (10) for moving a steering wheel as the relay rod moves in the axial direction,
and a pair of spherical bearings (11) for transmitting not the rotational motion
of the relay rod to the tie rods but the axial movement of the relay rod to the tie
rods.
Inventors:
TACHIKAKE YUJI
ABE MOTOKI
ABE MOTOKI
Application Number:
PCT/JP2007/073312
Publication Date:
June 12, 2008
Filing Date:
December 03, 2007
Export Citation:
Assignee:
THK CO LTD (JP)
TACHIKAKE YUJI
ABE MOTOKI
TACHIKAKE YUJI
ABE MOTOKI
International Classes:
B62D3/02; F16H25/20
Foreign References:
| JP2004284407A | 2004-10-14 | |||
| JPS59171758A | 1984-09-28 | |||
| JPH05124524A | 1993-05-21 | |||
| JPH05105103A | 1993-04-27 | |||
| JPS5495428A | 1979-07-27 | |||
| JP2000142429A | 2000-05-23 |
Attorney, Agent or Firm:
IDE, Tetsuroh et al. (Ohtamachi 6-chomeNaka-ku, Yokohama-shi, Kanagawa 11, JP)
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