Title:
DRIVE DEVICE FOR ELECTRIC VEHICLE
Document Type and Number:
WIPO Patent Application WO/2012/120647
Kind Code:
A1
Abstract:
The objective of the present invention is to increase the rotation accuracy of an input shaft of a speed reduction unit, increase the durability of bearings, and reduce rotational noise by improving a supporting structure of the input shaft of the speed reduction unit. A drive device for an electric vehicle comprises: an electric motor; a speed reduction unit (12) including an input shaft (13) that is driven by the output of the electric motor (11); and a hub unit (15) that is rotated and driven by an output member (14) of the speed reduction unit (12). The input shaft (13) of the speed reduction unit (12) is supported by bearings (58, 59) provided at two locations in the axial direction. The drive device is constructed such that the bearings (58, 59) provided at said two locations are both attached to the output member (14).
Inventors:
SUZUKI MINORU (JP)
MAKINO TOMOAKI (JP)
MAKINO TOMOAKI (JP)
Application Number:
PCT/JP2011/055395
Publication Date:
September 13, 2012
Filing Date:
March 08, 2011
Export Citation:
Assignee:
NTN TOYO BEARING CO LTD (JP)
SUZUKI MINORU (JP)
MAKINO TOMOAKI (JP)
SUZUKI MINORU (JP)
MAKINO TOMOAKI (JP)
International Classes:
B60K7/00; B60B35/18; B60K17/14; F16H1/28; H02K7/14
Domestic Patent References:
| WO2007010843A1 | 2007-01-25 |
Foreign References:
| JP2007078174A | 2007-03-29 | |||
| JP2010260476A | 2010-11-18 | |||
| JP2007057015A | 2007-03-08 | |||
| JP2001032888A | 2001-02-06 |
Other References:
See also references of EP 2684723A4
Attorney, Agent or Firm:
TORII Kazuhisa et al. (JP)
Kazuhisa Torii (JP)
Kazuhisa Torii (JP)
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Claims: