WHEEL DRIVE DEVICE - NTN TOYO BEARING CO LTD

Title:

WHEEL DRIVE DEVICE

Document Type and Number:

WIPO Patent Application WO/2015/045903

Kind Code:

A1

Abstract:

Provided is a wheel drive device capable of suppressing a decrease in coil temperature detection accuracy and increasing electric motor control response. The wheel drive device is provided with: an electric motor (1) that drives a wheel; a wheel bearing that transmits rotation of an electric motor to a wheel while rotatably supporting the wheel; and an oil feed mechanism that guides cooling and lubricating oil from the inside of a main shaft of the electric motor (1) in a radially outer direction, and that ejects the oil onto coils (78) of the electric motor (1). A temperature detection means (Sa) for detecting the temperature of the coils (78) is disposed above the center (L1) of the main shaft and in a gap (δ) between the coils (78, 78) adjacent in a circumference direction.

Inventors:

YAMADA WATARU (JP)

Application Number:

PCT/JP2014/074206

Publication Date:

April 02, 2015

Filing Date:

September 12, 2014

Export Citation:

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Assignee:

NTN TOYO BEARING CO LTD (JP)
YAMADA WATARU (JP)

International Classes:

B60K7/00; B60L3/00; H02K11/00

Foreign References:

JP2013112003A	2013-06-10
JP2011111059A	2011-06-09
JP2010252508A	2010-11-04
JP2009100538A	2009-05-07
JP2013110903A	2013-06-06
JP2012217303A	2012-11-08
JP2012178917A	2012-09-13

Other References: