Operation control device for three-joint type excavator
US6079131A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 15, 1998 |
| Grant date | Jun 27, 2000 |
| Priority date | — |
| Expiry date | Oct 15, 2018 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE02F9/265
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Two control lever units 11, 12 for operating a first arm 3, a second arm 4 and a third arm 5 of a 3-articulation work front 2 are provided, and signals 132, 133 from the two control lever units are sent to a controller 131. On condition that a virtual 2-articulation type work front comprising a virtual first arm 13 and a virtual second arm 14 is imaginarily provided and the relationship in movement between the virtual second arm and the actual third arm is set in advance as if both the arms constitute a rigid body together, the controller 131 determines respective command values .omega..sub.1, .omega..sub.2 and .omega..sub.3 for the actual first arm 3, the actual second arm 4 and the actual third arm 5 so that an intended angular speed of the actual third arm is provided by an angular speed of the virtual second arm resulted when the two control lever units are manipulated to function respectively as first operating means 11 for the virtual first arm and second operating means 12 for the virtual second arm 14. The command values are output as driving command signals to proportional pressure reducing valves 129, 130 of a hydraulic drive system. Operators having an ordinary skill can…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.