Title:
WORK VEHICLE
Document Type and Number:
WIPO Patent Application WO/2016/189918
Kind Code:
A1
Abstract:
The present invention ensures a reduction in weight and costs while achieving high efficiency in a transmission path and improving operability in a work vehicle such as a tractor. A work vehicle is provided with: an engine 5 that is mounted to a traveling machine body 2; a straight advance transmission path comprising a first continuously variable transmission 17; and a turning transmission path comprising a second continuously variable transmission 13. The output of the straight advance transmission path and the output of the turning transmission path are combined and used to drive left/right travel sections 3. The work vehicle is additionally provided with: control units 813, 814 that control the output of the straight advance transmission path and the output of the turning transmission path in a linked manner; and a control handle 9 that can be rotatably operated. The control units 813, 814 slow the output of the turning transmission path together with slowing of the output of the straight advance transmission path and, when the control handle 9 is operated, speed up the output of the turning transmission path, slow the output of the straight advance transmission path, and determine the speed ratio of the left/right travel sections 3 during turning on the basis of the steering angle of the control handle.
Inventors:
FUJIKI KATSUMI (JP)
IWAMURA KEISUKE (JP)
IWAMURA KEISUKE (JP)
Application Number:
PCT/JP2016/056773
Publication Date:
December 01, 2016
Filing Date:
March 04, 2016
Export Citation:
Assignee:
YANMAR CO LTD (JP)
International Classes:
B62D11/08; B62D11/10
Foreign References:
| JPH1178957A | 1999-03-23 | |||
| JP2001163241A | 2001-06-19 | |||
| JP2011160767A | 2011-08-25 |
Attorney, Agent or Firm:
WATANABE RYUICHI (JP)
Ryuichi Watanabe (JP)
Ryuichi Watanabe (JP)
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