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Title:
ELECTRIC POWER STEERING DEVICE
Document Type and Number:
Japanese Patent JP2012046168
Kind Code:
A
Abstract:

To provide an electric power steering device using a worm gear as a reduction gear in which occurrence of abnormal noise is prevented while keeping appearance quality or strength in the vicinity of a tooth surface of a worm wheel.

In the electric power steering device, the rotation of an electric actuator for generating steering auxiliary power is transmitted to wheels via a reduction gear mechanism having a metal made worm and a worm wheel engaged with the worm. A worm wheel molding engaged with the worm has a first molded part PB1 where the tooth part of the worm wheel 10 is foam-molded with a first synthetic resin material having foaming property and a second molded part PS1 which is integrally molded with the first molded part PB1 with the first synthetic resin material having no foaming property.


Inventors:
Nishida, Tomoya
Kurokawa, Takanori
Application Number:
JP2011000057905
Publication Date:
March 08, 2012
Filing Date:
March 16, 2011
Export Citation:
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Assignee:
JTEKT CORP
International Classes:
B62D5/04; F16H1/16; F16H53/06; F16H55/14
Domestic Patent References:
JP2002333059A2002-11-22
JP2008221519A2008-09-25
JP2004051961A2004-02-19
JP2002156025A2002-05-31



 
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