Title:
TRANSMISSION
Document Type and Number:
WIPO Patent Application WO/2016/189963
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide a transmission which, by suitably selecting a combination of valves configuring a valve set, can both reduce the number of parts and decrease costs. In order to achieve this, the transmission (3) is provided with a first travel valve set (77) which integrates a valve group for controlling the hydraulic pressure to a transmission mechanism (3S), and a second travel valve set (78) which integrates a valve group for controlling the hydraulic pressure to a front wheel drive mechanism (3F) and a braking mechanism (5B). Further, the valve group of the second travel valve set (77) includes a valve (781) which controls supply and discharge of a work fluid in a constant velocity clutch (341) of the front-wheel-drive switching device (34), a valve (782) which controls supply and discharge of the work fluid in a speed increasing clutch (342) of the front-wheel-drive switching device (34), and valves (783, 784) which control supply and discharge of the work fluid in hydraulic cylinders (53, 54) for automatic braking.
Inventors:
YOSHIOKA TERUNOBU (JP)
UENO SATOSHI (JP)
YAMAMOTO NAOKI (JP)
ANDO SHINYA (JP)
UENO SATOSHI (JP)
YAMAMOTO NAOKI (JP)
ANDO SHINYA (JP)
Application Number:
PCT/JP2016/060139
Publication Date:
December 01, 2016
Filing Date:
March 29, 2016
Export Citation:
Assignee:
YANMAR CO LTD (JP)
International Classes:
F16H57/033; B62D49/00; F16H61/00
Foreign References:
| JP2011196518A | 2011-10-06 | |||
| JP2007078060A | 2007-03-29 | |||
| JP2015033356A | 2015-02-19 | |||
| JP2012158208A | 2012-08-23 | |||
| JP2012091541A | 2012-05-17 |
Attorney, Agent or Firm:
YANO Juichiro (JP)
Juichiro Yano (JP)
Juichiro Yano (JP)
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