Drive system of a self-propelled working machine
US7200980B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 19, 2003 |
| Grant date | Apr 10, 2007 |
| Priority date | — |
| Expiry date | Apr 29, 2024 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2300/14
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A self-propelled forage harvester includes front and rear sets of driven ground wheels. The front set of wheels is driven through a transmission including an input shaft driven by a variable displacement motor and coupled to the front set of wheels by a gear train including one planetary gear set, (in one embodiment), and two planetary gear sets, (in a second embodiment). In both cases, the transmission is shiftable so as to establish at least first and second gear ratios. The shifting of the transmission is accomplished automatically by a control arrangement which takes into account the operating mode of the harvester so that a ratio for producing the correct velocity range for harvesting is established when the harvester is in a working operating mode, and a higher velocity range is established when the harvester is in a transport operating mode. Other operating parameters are sensed and used to automatically control hydraulic pump and/or motor displacement, and for controlling engine speed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.