IN-WHEEL MOTOR DRIVE DEVICE - NTN TOYO BEARING CO LTD

Title:

IN-WHEEL MOTOR DRIVE DEVICE

Document Type and Number:

WIPO Patent Application WO/2015/104980

Kind Code:

A1

Abstract:

Provided is an in-wheel motor drive device (21), which includes a casing (22) that holds a motor unit (A), a deceleration unit (B), and a wheel axle bearing (C), the motor unit (A) comprising a stator (23a) secured to the casing (22), a motor rotating shaft (24) rotatably supported by the casing (22) via rolling bearings (36, 36), and a rotor (23b) mounted on the motor rotating shaft (24), wherein the clearance (δ) of the rolling bearings (36) in the radially inner section prior to assembly with the motor unit (A) is set to the range of 8-25 µm. The in-wheel motor drive device (21) is characterized in that the motor rotating shaft (24) is rotatably supported by the casing (22) via a plurality of rolling bearings (36a', 36b') and the fit between the motor rotating shaft (24) and the rolling bearings (36a', 36b') that support the motor rotating shaft (24) is a transition fit or a tight fit.

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Inventors:

KURODA MASARU (JP)
SUZUKI KENICHI (JP)
UCHIYAMA NAOYUKI (JP)

Application Number:

PCT/JP2014/083792

Publication Date:

July 16, 2015

Filing Date:

December 19, 2014

Export Citation:

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Assignee:

NTN TOYO BEARING CO LTD (JP)
KURODA MASARU (JP)
SUZUKI KENICHI (JP)
UCHIYAMA NAOYUKI (JP)

International Classes:

B60K7/00; B60K17/14; F16C19/06; F16C25/08; F16C33/38; H02K5/173; H02K7/116

Foreign References:

JP2012148725A	2012-08-09
JP2004270841A	2004-09-30
JP2009257567A	2009-11-05
JP2012136080A	2012-07-19
JP2004328991A	2004-11-18
JP2008044538A	2008-02-28
JP2012202457A	2012-10-22
JP2013015180A	2013-01-24
JP2013029195A	2013-02-07
JP2005325907A	2005-11-24
JPH01307911A	1989-12-12
JP2012148725A	2012-08-09
JP2013148198A	2013-08-01

Other References: