Kubota Corporation

Tetsuya Nishida

Yoshiyuki Katayama

Shigekazu Hasegawa

Masami Kawasaki

Toshiya Fukumoto

Keiichi Sanpei

Shouhei Nakai

Disclosed is a pivotal movement control device for a boom-equipped working machine provided with a pivotal movement control responsive to the inclined angle of a control lever and a position detector for detecting the moved position of a boom in a lateral direction. The device includes a changeover switch for changing between an automatic mode and a manual mode, an automatic target position stop control for storing a signal from the position detector as a target stop position when the changeover switch is changed from the manual mode to the automatic mode and pivotally moving the boom to the target stop position and stopping it there while reading a positional signal from the position, when the boom is at a position other than the target stop position and the control lever is operated to the side of the target stop position. The device also includes a manual control for controlling the boom according to a signal from the pivotal movement control when the control lever is operated in another manner and when the changeover switch is in the manual mode.

Pivotal movement control device for boom-equipped working machine

In a work vehicle including a hydraulic clutch for a transmission system, the invention discloses an art of quickly yet shocklessly controlling the engagement of the clutch by properly judging a preliminary oil pressure condition and a half-clutched condition through a detection of torque developed in the transmission system.

Work vehicle

A cutter-trimmer comprising a drivingly rotatable cutter disposed at the front end of the body thereof, a guide handle disposed at the rear end of the body, a wheel member disposed in the vicinity of the cutter and reversibly rotatable about a horizontal axis for supporting the body thereon, and a cutter driving engine and a wheel member driving electric motor provided at a longitudinally intermediate portion of the body toward its front end. The device is adapted to perform a cutting operation while traveling forward, rearward or sideways by shifting the wheel member to a forward position or to a lateral position about a vertical axis and holding the wheel member in the shifted position.

Cutter-trimmer of walk-behind type

There is disclosed a plowing depth detecting system for a rotary plow adapted to detect an actual plowing depth on the basis of distance data with respect to the ground received from a distance sensor attached to the rotary plow which is vertically movably connected to a vehicle through a link mechanism. The distance sensor provides a microprocessor with distance data with respect to the ground rearwardly of the rotary plow. The microprocessor determines a value of actual plowing depth of the rotary plow on the basis of this distance data and a correction value according to a working condition of the rotary plow.

Plowing depth detecting system for rotary plow

A work vehicle with a rolling-control mechanism, having a ground-engaging implement to be connected via a three-point link mechanism adapted to be free to effect adjustment with respect to the connection positions, has a sensor to detect slanting of the vehicle body. It also has electrical circuitry for correcting the control gain based on the detection results thereof, in response to the adjustment of the implement-attaching width and of the connection positions of three-point link mechanism. It may further be provided with a sensor and a control mechanism for effecting the control to minimize errors as are particular to using, as the rolling-control mechanism, torsional displacement in the three-point link mechanism.

Growing community of inventors

Sakai, Japan

Tetsuya Nishida