IN-WHEEL MOTOR SYSTEM - BRIDGESTONE CORP

Title:

IN-WHEEL MOTOR SYSTEM

Document Type and Number:

WIPO Patent Application WO/2007/069567

Kind Code:

A1

Abstract:

An electric motor (10) and a speed reduction gear mechanism (11) are coupled by a flexible coupling (12) that is a power transmission mechanism such as an Oldham’s coupling. A casing (11c) of the speed reduction gear mechanism (11) is formed integrally with a knuckle (5) as a component of vehicle’s unsprung portion, or alternatively, is attached to the knuckle (5). Further, a motor case (10a) of the electric motor (10) is attached to a motor installation member (4m) via a shock absorbing mechanism (20), the motor installation member (4m) being provided on the lower side of a strut (4) for supporting the knuckle (5). The shock absorbing mechanism (20) has a spring member (21), a damper, and two guide members (23) for guiding the direction of operation of the spring member (21) and the damper. The construction allows the mass of the motor (10) to act as the mass of a dynamic damper. An in-wheel motor system thus obtained improves ground contact performance and ride quality of a vehicle traveling on a bad road and has good space efficiency.

Inventors:

NISHIOKA SATOSHI (JP)
IWANO HARUO (JP)
TASHIRO KATSUMI (JP)

Application Number:

PCT/JP2006/324675

Publication Date:

June 21, 2007

Filing Date:

December 11, 2006

Export Citation:

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Assignee:

BRIDGESTONE CORP (JP)
NISHIOKA SATOSHI (JP)
IWANO HARUO (JP)
TASHIRO KATSUMI (JP)

International Classes:

B60K7/00; B60G3/18; B60G13/16; B60K17/14; B60L15/00; H02K7/116

Domestic Patent References:

WO2002083446A1

2002-10-24

Foreign References:

JP2005088605A	2005-04-07
JP2004338545A	2004-12-02
JP2005126037A	2005-05-19
JP2004338487A	2004-12-02
JP2005329757A	2005-12-02

Other References: