Kubota Corporation

Toshio Ishiguro

Tuyoshi Aoki

Toshihiko Takemura

Hideaki Mizota

Minoru Kyotani

A reinforcing frame structure for coupling a front loader (6) to a front region of a tractor body (5) and a working implement to a rear region thereof. The reinforcing frame structure (8) includes right and left frames (13) arranged laterally of the tractor body (5) and extending longitudinally thereof, a first cross bar (14) for rigidly interconnecting the right and left frames in rearward positions thereof, a rear connecting mechanism (12) formed integrally with the rearward positions of the right and left frames to be connectable to a rear axle case (18) of the tractor body from below, a working implement coupling mechanism (11) for coupling the working implement, a loader coupling mechanism (9) for coupling the front loader, and a front connecting mechanism (16) for connecting forward regions of the right and left frames to the tractor body. The rear connecting mechanism (12) includes a holding mechanism for holding opposite ends of the rear axle case (18), whereby the reinforcing frame structure (8) is attachable to and detachable from the tractor body (5) from below.

Reinforcing frame structure for a tractor

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.

Control system for working machine having boom

A ground working implement comprises a frame, a rotary ground working unit supported by the frame and rotatable about a horizontal axis, a transmission for the working unit, a cover assembly covering the working unit and including a movable cover, and a holder detachably engageable with the frame and the cover to hold the cover while the cover is in contact with the ground at a position to the rear of and spaced from the peripheral portion of the working unit in contact with the ground. Thus the cover cooperates with the working unit to serve as a stand for holding the implement in its upright position. The cover is also holdable in a raised position by the holder to facilitate the maintenance of the working unit. The cover can also be shaped to have a front contact portion and a rear contact portion continuous therewith and positioned at a lower level than the front contact portion with an intermediate portion therebetween held out of contact with the ground by a space. A suspender can be provided for suspending the cover assembly from the frame, which can include a shock absorber.

Power-driven rotary ground working implement

A structure for mounting a work implement on a tractor in which each of the right and left coupling means may be attached to the work implement in two alternative transversely reversed positions. This arrangement provides positional adjustment of the work implement in the transverse direction.

Growing community of inventors

Sakai, Japan

Toshio Ishiguro