Kubota Corporation

Tuyoshi Aoki

Toshio Ishiguro

Hideaki Mizota

A device for attaching a working machine to a vehicle in which a heavy weight working machine can be detachably and fixedly attached to the vehicle and a three point link type working machine can also be attached through a three points linking mechanism when the heavy working machine is not attached to the vehicle. The device includes an attachment frame at a rear portion of the vehicle body, and a working machine connecting portion for attaching the heavy weight working machine. Further, a three point link connecting portion for connecting the three point linking mechanism is provided on the attachment frame.

Device for attaching working machine to vehicle

A control system for a working machine which has a boom equipped with a working implement at its forward end and pivoted to a vehicle body movably about a vertical axis, and control valve for controlling the movement of the boom. The system comprises a variable resistor for setting a target position where the boom is to be stopped to produce a setting signal, a sensor for detecting the moved position of the boom to produce a detection signal, differential device for determining the difference between the setting signal and the detection signal to produce a difference signal, a detector for detecting the direction of movement of the boom from the magnitude of the difference signal, a pulse-width modulator for subjecting the difference signal to pulse-width modulation to produce a pulse signal, and a driver for driving the control valve by the pulse signal in the detected direction in proportion to the difference signal.

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Osaka, Japan

Tuyoshi Aoki