Title:
WORK VEHICLE
Document Type and Number:
Japanese Patent JP2016215945
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To achieve a high efficiency of a transmission path and enhancement of operability of a work vehicle such as a tractor while assuring weight saving and cost reduction of the vehicle.SOLUTION: A work vehicle comprises an engine 5 mounted on a travel body, a direct advance system transmission path having a first infinite variable-speed drive, and a revolving system transmission path having a second infinite variable-speed drive, in which an output of the direct advance system transmission path and an output of the revolving system transmission path are synthesized thereby driving left and right travel parts. The work vehicle comprises a control part which interlockingly controls the output of the direct advance system transmission path and the output of the revolving system transmission path, and a steering handle which can be rotationally operated. The control part decelerates the output of the revolving system transmission path in association with deceleration of the output of the direct advance system transmission path. When the steering handle is operated, the control part increases a speed of the output of the revolving system transmission path, decelerates the output of the direct advance system transmission path, and decides a speed ratio of the left and right travel parts during revolution on the basis of a steering angle of the steering handle.SELECTED DRAWING: Figure 18
Inventors:
FUJIKI KATSUMI
IWAMURA KEISHO
IWAMURA KEISHO
Application Number:
JP2015105792A
Publication Date:
December 22, 2016
Filing Date:
May 25, 2015
Export Citation:
Assignee:
YANMAR CO LTD
International Classes:
B62D11/08; B62D11/10
Domestic Patent References:
| JPH1178957A | 1999-03-23 | |||
| JP2001163241A | 2001-06-19 | |||
| JP2011160767A | 2011-08-25 |
Attorney, Agent or Firm:
Ryuichi Watanabe