BELT TYPE CONTINUOUSLY VARIABLE TRANSMISSION, POWER UNIT HAVING BELT TYPE CONTINUOUSLY VARIABLE TRANSMISSION, VEHICLE CARRYING BELT TYPE CONTINUOUSLY VARIABLE TRANSMISSION, AND SHEAVE FOR CONTINUOUSLY VARIABLE TRANSMISSION

Title:

Document Type and Number:

WIPO Patent Application WO/2005/090828

Kind Code:

A1

Abstract:

A belt type continuously variable transmission (15), comprising a primary sheave (29), a secondary sheave (30), and a belt (31). The primary sheave (29) further comprises a first sheave body (34a), a second sheave body (34b) forming, between the clearance thereof from the first sheave body (34a), a belt groove (37) for wrapping around the belt (31) therein, a plurality of pressing bodies (45) varying the width of the belt groove (37) by sliding the second sheave body (34b) according to a centrifugal force, and a plurality of stoppers (66) limiting the movement of the pressing bodies (45) by coming into contact with the outer surfaces (47a) of the pressing bodies (45) when the second sheave body (34b) reaches a least reduction gear ratio position where the width of the belt groove (37) is narrowest. The stoppers (66) are formed in such a shape that promotes the wear of a part of the outer surfaces (47a) of the pressing bodies (45).

Inventors:

ISHIDA YOUSUKE (JP)

Application Number:

PCT/JP2005/003727

Publication Date:

September 29, 2005

Filing Date:

March 04, 2005

Export Citation:

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Assignee:

YAMAHA MOTOR CO LTD (JP)
ISHIDA YOUSUKE (JP)

International Classes:

F16H9/18; F16H55/56; F16H63/06; (IPC1-7): F16H9/18

Foreign References:

JP2001248698A	2001-09-14
JPH0861448A	1996-03-08
JPH0577653U	1993-10-22
JPS63303253A	1988-12-09
JP2938864B1	1999-08-25
JPH05203004A	1993-08-10
JP2001248698A	2001-09-14

Other References: