Yanmar Co., Ltd.

Yanmar Agricultural Equipment Co., Ltd.

Yanmar Power Technology Co., Inc.

Masakazu Komatsu

Susumu Akashima

Mitsuyuki Hatanaka

Kazuhisa Yokoyama

Kiyoyuki Okuyama

Kunihiko Matsumoto

Zenzo Uchida

Keiichi Hayashi

Yukio Kubota

Kozo Kitayama

Yuuji Kitasaka

Susumu Nochi

A work vehicle includes a cabin to cover an operator's seat on a traveling body. A cabin frame that constitutes a framework of the cabin includes a pair of left and right front pillars, a pair of left and right rear pillars, a front beam, a rear beam, and side beams. The front beam couples upper end portions of the front pillars to each other. The rear beam couples upper end portions of the rear pillars to each other. Each of the side beams couples to each other upper end portions of each of the front pillars and each of the rear pillars that stand at a front and rear. The rear beam is formed to have a U-shaped cross-section by presswork of a metal plate material.

Work vehicle with accommodation for air conditioner in rear beam of cabin frame

A work vehicle such as a tractor including a fuel tank (), a fuel tank cover (), a dashboard support member (), and a dashboard (). The fuel tank () is disposed in a rear portion of a hood in a longitudinal direction of a vehicle body of the tractor. The fuel tank cover () covers a rear portion of the fuel tank (). The dashboard support member () is attached to the fuel tank cover (). The dashboard () is supported by the dashboard support member (). The fuel tank cover () includes a first attachment portion () for attaching the dashboard support member (). The dashboard () is configured to be directly attachable to the first attachment portion () (without using the dashboard support member ()).

Work vehicle

Steering wheel

With regard to a tractor having a high-powered engine, universal joints must be enlarged, whereby the attachment work of a power transmission shaft becomes difficult. Furthermore, the kind of the universal joints to be used is limited, thereby being inconvenient. Therefore, a tractor is constructed so that a transmission casing is arranged in a rear portion of a vehicle body, a front axle casing is arranged in the front portion of the vehicle body, and power from an engine is transmitted from an output shaft supported by the transmission casing through a power transmission shaft to an input shaft supported by the front axle casing. The tractor is characterized in that a gear casing is disposed between the transmission casing and the front axle casing, the output shaft of the transmission casing and an input shaft of the gear casing are arranged on a same line and connected to each other, and the input shaft of the front axle casing and an output shaft of the gear casing are arranged on a same line and connected to each other.

Tractor

A crawler tractor comprises steering mechanisms () () for rotating a machine body by causing right and left crawler belts () to move differentially. The tractor is characterized in that the steering mechanism () is connected to a drive system located behind a reverser mechanism () that moves the machine body forward and back. Even when the machine body movement direction is changed from forward to back, the direction of the steering wheel () and the direction of the rotation of the machine body are kept the same, so that a reversed steering phenomenon is prevented from occurring, and an appropriate operation in forward or back movement is enabled with a simple structure that does not require an additional mechanism such as a reverse-steering preventions mechanism.

Crawler tractor

A tractor having right and left traveling crawlers () installed thereon, comprising a hydraulic transmission swing mechanism (), a forced-diff () for driving a crawler driving sprocket (), and an engine (), a hydraulic transmission straight-ahead driving mechanism (), and a transmission case () disposed from the front side to the rear side of a machine body in that order, wherein an allowance for heat radiation is provided to a space under a machine floor for storing the hydraulic transmission straight-ahead driving mechanism () to eliminate the problem of the machine floor becoming too high, and the forced-diff () is driven by the hydraulic transmission swing mechanism () with a simple structure.

Growing community of inventors

Osaka, Japan

Masakazu Komatsu