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Patent Searching and Data


Title:
POWER STEERING DEVICE
Document Type and Number:
WIPO Patent Application WO/2014/148219
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide an integral power steering device in which left-right torque differences can be resolved. In this power steering device, when the distance between the meshing point of a rack tooth (71) and a sector gear (8) and the center of rotation (O1) of the sector gear (8) is the pitch radius, the pitch radii r (large) and R (large) when a piston moves in the direction in which the volume of one pressure chamber increases and the pitch radii r (small) and R (small) when the piston moves in the direction in which the volume of the one pressure chamber decreases are formed so as to be mutually differing radii, such that reduced is the difference between the size of the output torque of the sector gear (8) with respect to a steering operation in one turning direction of a steering wheel and the size of the output torque with respect to a steering operation in the other turning direction of the steering wheel.

Inventors:
ARAI TOSHIHIRO (JP)
ISHIKAWA SHOGO (JP)
Application Number:
PCT/JP2014/054811
Publication Date:
September 25, 2014
Filing Date:
February 27, 2014
Export Citation:
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Assignee:
HITACHI AUTOMOTIVE SYSTEMS STEERING LTD (JP)
International Classes:
B62D3/08; B62D5/18; F16H19/04; F16H25/20
Foreign References:
JP2006248425A2006-09-21
JPS60252068A1985-12-12
JPS5726051A1982-02-12
JPH10278818A1998-10-20
Attorney, Agent or Firm:
ONO, Shinjiro et al. (JP)
Ono Shinjiro (JP)
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