logo

For the Inventor, By the Inventor

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 9333843 B1

PDFFull Text
Date of Patent:
May. 10, 2016

Filed:

Mar. 08, 2011

Drive device for electric vehicle

Applicants:

Minoru Suzuki, Iwata, JP;

Yukiko Takekawa, Iwata, JP;

Tomoaki Makino, Iwata, JP;

Inventors:

Minoru Suzuki, Iwata, JP;

Yukiko Takekawa, Iwata, JP;

Tomoaki Makino, Iwata, JP;

Assignee:

NTN CORPORATION, Osaka, JP;

Attorney:

Wenderoth, Lind & Ponack, L.L.P.

Primary Examiner:

Tisha Lewis

Int. Cl.
CPC ...
B60K 17/14 (2006.01); B60K 17/04 (2006.01); B60K 1/00 (2006.01); H02K 5/173 (2006.01); H02K 7/08 (2006.01); H02K 7/116 (2006.01); B60B 35/18 (2006.01); B60K 7/00 (2006.01); H02K 7/14 (2006.01); H02K 5/18 (2006.01); H02K 5/22 (2006.01); F16H 57/08 (2006.01); F16H 1/28 (2006.01);
U.S. Cl.
CPC ...
B60K 1/00 (2013.01); B60B 35/18 (2013.01); B60K 7/0007 (2013.01); B60K 17/145 (2013.01); H02K 5/1732 (2013.01); H02K 7/083 (2013.01); H02K 7/116 (2013.01); B60K 2007/0092 (2013.01); F16H 1/28 (2013.01); F16H 57/082 (2013.01); H02K 5/18 (2013.01); H02K 5/225 (2013.01); H02K 7/14 (2013.01); Y02T 10/641 (2013.01);
Abstract

A drive device for an electric vehicle in which, by improving a supporting structure of an input shaft of a speed reduction unit, the bearing stiffness of a hub bearing is improved, while the rotational accuracy and the durability of an input shaft of a speed reduction unit are improved and noise is suppressed. The drive device includes: a speed reduction unit including an input shaft driven by an electric motor; a hub unit rotationally driven by the speed reduction unit; and a housing. The input shaft of the speed reduction unit is supported by bearings provided at two locations in the axial direction. The bearings are both supported by the output member, and the PCD of the inboard-side hub bearing of the hub bearings disposed at the two locations in the axial direction of the hub unit is larger than the PCD of the outboard-side hub bearing.

Find Patent Forward Citations

Loading…