BELT-TYPE CONTINUOUSLY VARIABLE TRANSMISSION

Title:

BELT-TYPE CONTINUOUSLY VARIABLE TRANSMISSION

Document Type and Number:

WIPO Patent Application WO/2012/172836

Kind Code:

A1

Abstract:

Provided is a belt-type continuously variable transmission which may prevent a servo spool from sliding even when a movable sieve slides due to reduced pressure in a hydraulic cylinder. A hydraulic servo mechanism (280) comprises a servo spool (283) and a feedback spool (84), and contiguous members (278F, 278R) coming into contact with the feedback spool (84) between a hydraulic cylinder (270) and the feedback spool (84). The present invention also comprises a spool position maintaining unit that makes it possible for the contiguous members (278F, 278R) to slide in relation to a movable side cylinder case (271) when pressure in the hydraulic cylinder (270) is lower than a predetermined value.

Inventors:

OUCHIDA TAKESHI (JP)
ISHINO FUMITOSHI (JP)

Application Number:

PCT/JP2012/055130

Publication Date:

December 20, 2012

Filing Date:

February 29, 2012

Export Citation:

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Assignee:

YANMAR CO LTD (JP)
OUCHIDA TAKESHI (JP)
ISHINO FUMITOSHI (JP)

International Classes:

F16H61/00; F16H9/12

Foreign References:

JP2005265007A	2005-09-29
JPH05280633A	1993-10-26
JPS58180863A	1983-10-22
JP2010096338A	2010-04-30

Other References: