Title:
WORK VEHICLE
Document Type and Number:
Japanese Patent JP2017074889
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a work vehicle such as a tractor, which enhances an efficiency of a transmission path and improves operability while achieving weight reduction and low cost.SOLUTION: A work vehicle is equipped with: a straight-advancing system transmission path having a first stepless transmission 17; a turning system transmission path having a second stepless transmission 13; control portions 813 and 814 which control interlockingly output of the straight-advancing system transmission path and the turning system transmission path; and an operation handle 9 which can be rotatably operated. The output of the straight-advancing system transmission path and the output of the turning system transmission path are combined to drive left and right running portions 3. The control portions 813 and 814 accelerate the output of the turning system transmission path and decelerates the output of the straight-advancing system transmission path in response to operation of the control handle 9 and determines speed ratios of the left and right running portions 3 during turning on the basis of steering angles of the control handle 9, which can change a dead zone width in a neutral position of the control handle 9.SELECTED DRAWING: Figure 20
More Like This:
| WO/2003/046415 | HYDRO−MECHANICAL CONTINUOUSLY VARIABLE TRANSMISSION |
Inventors:
FUJIKI KATSUMI
IWAMURA KEISHO
IWAMURA KEISHO
Application Number:
JP2015204219A
Publication Date:
April 20, 2017
Filing Date:
October 16, 2015
Export Citation:
Assignee:
YANMAR CO LTD
International Classes:
B62D11/18; F16H47/04
Domestic Patent References:
| JP2001063611A | 2001-03-13 | |||
| JPH09207806A | 1997-08-12 | |||
| JPH08103102A | 1996-04-23 | |||
| JP2013060146A | 2013-04-04 | |||
| JP2005199770A | 2005-07-28 |
Foreign References:
| US20080018269A1 | 2008-01-24 |
Attorney, Agent or Firm:
Ryuichi Watanabe