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Patent Searching and Data


Title:
ELECTRIC POWER STEERING DEVICE
Document Type and Number:
Japanese Patent JP2013112312
Kind Code:
A
Abstract:

To provide an electric power steering device having a lightweight and highly reliable gear box for housing a reduction gear mechanism.

An electric power steering device includes a gear box 33. The gear box includes a housing member 33A for housing a reduction gear mechanism 30 and a cover member 33B covering an opening of the housing member 33A, and is formed by tightly securing and integrating them with a bolt 33C and a nut. The housing member 33A and the cover member 33B are produced by insertion-molding of resin material, wherein metallic core metals 36A, 36B are inserted into the resin material, and have a bolt hole through which a bolt 33C is inserted. The resin material contains foamed plastic having air bubbles with air bubble diameter of ≥1 μm and ≤50 μm.


Inventors:
MURAKAMI TAKESHI
KIYOTA HARUHIKO
Application Number:
JP2011000262979
Publication Date:
June 10, 2013
Filing Date:
November 30, 2011
Export Citation:
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Assignee:
NSK LTD
International Classes:
B62D5/04; B29C45/00; B29C45/14; C08J5/08; C08J9/12
Attorney, Agent or Firm:
内藤 嘉昭