Work vehicle
US8418797B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 3, 2008 |
| Grant date | Apr 16, 2013 |
| Priority date | — |
| Expiry date | Apr 15, 2029 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2059/506
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
The purpose of the present invention is to provide a work vehicle that does not slip. The work vehicle has an engine (10) generating a rotational power, a hydraulic stepless transmission (HST) (20) having a hydraulic pump (22) and a hydraulic motor (24) and changing the speed of rotation generated by the engine (10) and transmitting it to drive wheels (40), an actuator (73) for adjusting the transmission ratio of the HST (20) by changing the tilt angle of a movable swash plate (22a) of the hydraulic pump (22), a shift lever (speed setting means) (50) for setting the speed of a motor output shaft (25) changed by the HST (20), and a control device (60) for controlling operation of the actuator (73) so that the speed of the motor output shaft (25) changed by the HST (20) changes at a predetermined rate of change (β) until it reaches the speed (preset speed) set by the shift lever (50).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.