OPERATION CONTROL DEVICE FOR THREE-JOINT EXCAVATOR

WIPO Patent Application WO/1998/006909

A1

A speed command value X1 for a first arm (3) is determined by control inputs c, d such that -1 < X1 < 1 is established where a side d for lifting of the first arm is positive, a side c for lowering of the first arm is negative, and a speed command value at the time of full lever operation corresponding to a rated speed of the first arm is 1. A speed command value X3 for a third arm (5) is determined by control inputs e, f such that -1 < X3 < 1 is established where a side f for damping of the third arm is positive, a side e for crowding of the third arm is negative, and a speed command value at the time of full lever operation corresponding to a rated speed of the third arm is 1. At this time, a speed command value X2 for a second arm (4) is given as X2 = K1xX1 + K3xX3 where a lifting side of the second arm is positive. Therefore, it is possible in an operation control device for three-joint excavators to effect continuous operation in a broad operating space of the excavator with a feeling of operation, which is identical with that for two-joint excavators within a range of an operator's ordinary skill.

JPS5542984	EXCAVATION WORK VEHICLE
JPH04237795	SHAFT EXCAVATING DEVICE
JPS59130925	SLEWING TYPE POWER WORKING MACHINE

OSHINA MORIO (JP)
SONODA MITSUO (JP)
EGAWA EIJI (JP)
TSUMURA JUNJI (JP)

PCT/JP1997/002757

February 19, 1998

August 07, 1997

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HITACHI CONSTRUCTION MACHINERY (JP)
OSHINA MORIO (JP)
SONODA MITSUO (JP)
EGAWA EIJI (JP)
TSUMURA JUNJI (JP)

E02F3/30; E02F3/43; E02F9/20; E02F9/22; (IPC1-7): E02F3/43

JPH05202532A	1993-08-10
JPH01244017A	1989-09-28
JPH04343992A	1992-11-30
JPS63114730A	1988-05-19

Kasuga, Yuzuru (1-3 Nihonbashi-Kodenmach, Chuo-ku Tokyo 103, JP)

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