PULLEY SUPPORT STRUCTURE FOR BELT-DRIVE CONTINUOUSLY VARIABLE TRANSMISSION AND BELT-DRIVE CONTINUOUSLY VARIABLE TRANSMISSION

WIPO Patent Application WO/2010/074285

A1

Disclosed are a pulley support structure for a belt-drive continuously variable transmission and a belt-drive continuously variable transmission that are able to control the occurrence of Mindlin slip itself, and in cases where Mindlin slip has occurred, is able to effectively reduce the effects thereof. In this pulley support structure for a belt-drive continuously variable transmission, 2500 MPa or less is the maximum contact pressure during use between the raceway surfaces of the inner wheel and outer wheel and the rolling elements in the various roller bearings for rotatably supporting the pulleys for the continuously variable transmission. Furthermore, the rolling element surface hardness is HRc 60 or greater, and is at least 1 HRc harder than that of the raceway surfaces. Furthermore, the surface of the rolling element is nitrided or carbonitrided, and the nitrogen concentration in that surface is 0.2% by mass or greater and 2.0% by mass or less. Furthermore, radial direction gap in the various roller bearings during use is -30 µm or greater and 10 µm or less.

HIZUKA SHIGEKI (JP)
UEDA KOUJI (JP)
TANAKA SUSUMU (JP)
MITAMURA NOBUAKI (JP)

PCT/JP2009/071793

July 01, 2010

December 28, 2009

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NSK LTD (JP)
HIZUKA SHIGEKI (JP)
UEDA KOUJI (JP)
TANAKA SUSUMU (JP)
MITAMURA NOBUAKI (JP)

F16H9/12; F16C19/06; F16C33/32; F16C33/62

JP2008267509A	2008-11-06
JP2008232212A	2008-10-02
JP2004052967A	2004-02-19
JP2008267402A	2008-11-06
JP2003049837A	2003-02-21
JP2005121080A	2005-05-12

MORI Tetsuya et al. (JP)
Woods Tetsuya (JP)

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