Operation control device for three-joint excavator
US6101437A · kind A · utility
Inventors
Key dates
| Filing date | Apr 14, 1998 |
| Grant date | Aug 8, 2000 |
| Priority date | — |
| Expiry date | Apr 14, 2018 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE02F9/2285
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A speed command value X1 for a first arm 3 is decided depending on a lever input amount in the direction c, d. Assuming that the side d corresponding to move-up of the first arm is positive, the side c corresponding to move-down thereof is negative, and a speed command value resulted upon full lever operation and corresponding to a rated speed of the first arm is 1, X1 is given by -1<X1<1. A speed command value X3 for a third arm 5 is decided depending on a lever input amount in the direction e, f. Assuming that the side f corresponding to dumping of the third arm is positive, the side e corresponding to crowding thereof is negative, and a speed command value resulted upon full lever operation and corresponding to a rated speed of the third arm is 1, X3 is given by -1<X3<1. A speed command value X2 for a second arm 4 is here given by X2=K1.times.X1+K3.times.X3 on condition that the side corresponding to move-up of the second arm is positive. With such an operation control system for a 3-articulation type excavator, the excavator can be operated by operators having an ordinary skill continuously over a wide working area specific to 3-articulation type excavators with the same operat…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.