METHOD AND DEVICE FOR CONTROLLING TOOL OF EARTH-MOVING MACHINE

Japanese Patent JP3952094

B2

PROBLEM TO BE SOLVED: To increase the operability, by receiving the position of tools and operator's command signals and correcting the signals and controlling a hydraulic cylinder.
SOLUTION: A joy stick position detector 220 detects the position of a joy stick control lever 219 and transmits electrical actuation command signals to a controller 208. Detectors 216, 218 for tool positions detect the positions of working tools against an earth-moving machine to transmit tool position signals. The controller 208 is provided with a software having a memory of a look-up table obtaining the magnitude of a specified electric bubble signal. The controller 208 receives the tool position signal and the command signals of operators and corrects the command signals and transmits electric bubble signals with a magnitude to correspond thereto. The bubble means 202 receives electric bubble signals and gives the hydraulic fluid flows to respective hydraulic cylinders for control of the tools in response thereto. In this way, the tool speed is regulated to prevent an abrupt movement thereof.

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Cynthia M Gardner
Robert e stone
John Dee Duffy
William E. Allen
James F Sea Simp

JP16581397A

August 01, 2007

June 23, 1997

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CATERPILLAR INCORPORATED

E02F3/43; E02F9/22; E02F9/20; F15B9/17; (IPC1-7): E02F9/20; F15B9/17

US5189940
US5333533
US5366202
US5511458

Minoru Nakamura
Fumiaki Otsuka
Shishido Kaichi
Hideto Takeuchi
Toshio Imajo
Nobuo Ogawa
Village shrine Atsuo

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