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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 10183693 B1

PDFFull Text
Date of Patent:
Jan. 22, 2019

Filed:

Apr. 24, 2015

Electric power steering device

Applicant:

Nsk Ltd., Tokyo, JP;

Inventor:

Toru Segawa, Maebashi, JP;

Assignee:

NSK LTD., Tokyo, JP;

Attorney:

Sughrue Mion, PLLC

Primary Examiner:

Joseph M Rocca

Assistant Examiner:

Michael R Stabley

Int. Cl.
CPC ...
B62D 5/04 (2006.01); F16H 1/16 (2006.01); F16H 57/00 (2012.01); F16H 57/12 (2006.01); F16H 55/56 (2006.01); F16H 57/022 (2012.01); F16C 23/08 (2006.01); F16C 27/06 (2006.01); F16H 57/021 (2012.01); F16C 19/06 (2006.01);
U.S. Cl.
CPC ...
B62D 5/0454 (2013.01); B62D 5/0409 (2013.01); F16C 23/08 (2013.01); F16C 27/066 (2013.01); F16H 1/16 (2013.01); F16H 55/566 (2013.01); F16H 57/0006 (2013.01); F16H 57/022 (2013.01); F16H 57/12 (2013.01); F16C 19/06 (2013.01); F16H 2057/0213 (2013.01); F16H 2057/0222 (2013.01); F16H 2057/127 (2013.01);
Abstract

A slide member () is externally fitted to an outer peripheral surface of an outer ring () configuring a tip side bearing () for supporting a tip portion of a worm shaft () so as to be displaceable in an axial direction. A first inclined cylindrical face portion () which is an inclined surface disposed on an outer peripheral surface of the slide member (), and a second inclined cylindrical face portion () which is an inclined surface disposed on an inner peripheral surface of a guide member () internally fitted and fixed to a holding hole () of a housing () are fitted to each other so as to be slidable in an inclined direction of the respective inclined cylindrical face portions (). An elastic ring () which biases a bearing holding member () against to one side in the axial direction is disposed. This realizes a structure which can shorten an axial dimension of a tip side portion of the worm shaft in an electric power steering device including biasing means for minimizing backlash in a meshing portion of a worm reduction gear.

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