Kubota Corporation

Hiroyuki Miki

Genichi Funabashi

Seiichi Ishiizumi

Kazuo Hirata

Yasuo Nakata

Hisato Katoh

Tetsu Fukui

Mikio Ishida

Hisato Kato

Hajime Shikiya

Shozo Ishimori

Mikio Kinoshita

Tsutomu Toiguchi

Agricultural tractor

A rollover protection system for a working vehicle including a pair of lower props fixed at lower ends thereof to a chassis, a U-shaped upper cross bar pivotally connected to upper ends of the lower props, and connectors disposed between the lower props and the upper cross bar for selectively permitting the upper cross bar to pivot relative to the lower props. The connectors have a pair of right and left engaging members disposed at the upper ends of the lower props, respectively, a pair of right and left engageable members disposed at lower ends of the upper cross bar, respectively, and control handles for selecting between a first state to engage the engaging members and the engageable members, and a second state to disengage the engaging members and the engageable members. The lower props and the upper cross bar have such shapes and dimensions that, when the control handles are operated to provide the second state, the engaging members and the engageable members are elastically movable away from each other.

Rollover protection system for a working vehicle

Agricultural tractor cab

Agricultural tractor cabin

A four wheel drive vehicle with dirigible front wheels, comprising a main propelling drive transmission, and a front wheel drive transmission connected to the main transmission. The front wheel drive transmission is switchable between a first four wheel drive mode in which the front wheels and the rear wheels are driven at a substantially equal peripheral speed and a second four wheel drive mode in which the front wheels are driven at a higher peripheral speed than the rear wheels. The front wheel drive transmission includes a piston operable by a hydraulic control system including a control valve mechanically interlocked to a steering section of the vehicle for switching the front wheel drive transmission from the first drive mode to the second drive mode. The piston, which normally is biased toward a position for the first drive mode, is movable against the biasing force to a position for the second drive mode when the front wheels are steered to an angle exceeding a predetermined angle.

Four wheel drive vehicle

An agricultural tractor with a driver's cabin, in which the cabin is supported by a safety frame which is in turn supported by an axle case.

Agricultural tractor with a driver's cabin

A wheel drive structure for an agricultural tractor comprising a drive case housing a differential mechanism and reduction mechanisms to transmit power from said differential mechanism to wheels. The drive case comprises first and second case portions and said first case portion is made of a structural steel pipe.

Wheel drive structure for agricultural tractor

A transmission for agricultural tractors in which a front wheel speed increasing transmission part (12) is disposed forwardly of a main transmission part (8). An input shaft (13) and an output shaft (15) of the speed increasing transmission part (12) are arranged coaxial with a front wheel drive output shaft (14a) of the main transmission part (8).

Transmission for agricultural tractors

Growing community of inventors

Sakai, Japan

Hiroyuki Miki