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Patent Searching and Data


Title:
POWER STEERING DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/058949
Kind Code:
A1
Abstract:
Provided is a power steering device, wherein sound and vibration characteristics due to pitch differences can be improved. When belt pitch is the pitch of a plurality of belt teeth, first state belt pitch is the belt pitch in a no-load state in which an electric motor is not energized, second state belt pitch is the belt pitch on the side stretched by a motor pulley when the electric motor is energized, and first pulley pitch is the pitch of a plurality of teeth sections of a first pulley, which is the pulley having a smaller diameter among the motor pulley and a nut pulley, the following equations are satisfied. Equation 1: first state belt pitch < first pulley pitch, and Equation 2: absolute value of (first pulley pitch – second state belt pitch) < (first pulley pitch – first state belt pitch).

Inventors:
YOSHIDA, Osamu (4-7-1, Onna, Atsugi-sh, Kanagawa 10, 〒2438510, JP)
MARUYAMA, Tatsuyoshi (4-7-1, Onna, Atsugi-sh, Kanagawa 10, 〒2438510, JP)
Application Number:
JP2018/032687
Publication Date:
March 28, 2019
Filing Date:
September 04, 2018
Export Citation:
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Assignee:
HITACHI AUTOMOTIVE SYSTEMS, LTD. (2520, Takaba Hitachinaka-sh, Ibaraki 03, 〒3128503, JP)
International Classes:
B62D5/04; F16G1/28; F16H19/06; F16H25/20; F16H25/22
Domestic Patent References:
WO2014024377A12014-02-13
Foreign References:
JP2017144805A2017-08-24
JPH09159000A1997-06-17
JPH04331844A1992-11-19
JPH05106696A1993-04-27
JPS5582544U1980-06-06
JPS5977649U1984-05-25
Attorney, Agent or Firm:
ONO, Shinjiro et al. (YUASA AND HARA, Section 206 New Ohtemachi Bldg., 2-1, Ohtemachi 2-chome, Chiyoda-k, Tokyo 04, 〒1000004, JP)
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