Suzuki Motor Corporation

Suzuki Kabushiki Kaisha

Kohei Kato

Tatsushi Uchiyama

Hiroyasu Inohara

Takatoshi Maemori

Hidetoshi Arakawa

Koji Mori

Tomoyuki Oda

Shuichi Imanari

Makoto Nagao

There is provided a shift device for a straddle-type vehicle that is configured to cause a transmission device to perform a shift change in accordance with rotation of a shift shaft. The shift device includes: a shift lever provided with an operation portion that is configured to receive a shift operation; a shift sensor provided on the shift shaft so as to be integrally rotatable with the shift shaft; and a shift rod that couples the shift lever and the shift sensor. The shift sensor is configured to detect the shift operation on the shift lever in accordance with a movement of the shift rod. The operation portion and the shift sensor are positioned at the same side in a manner of sandwiching the shift rod.

Shift device

There is provided a shift device for a straddle-type vehicle that is configured to cause a transmission device to perform a shift change in accordance with rotation of a shift shaft. The shift device includes: a shift lever provided with an operation portion that is configured to receive a shift operation; a shift sensor provided on the shift shaft so as to be integrally rotatable with the shift shaft; and a shift rod that couples the shift lever and the shift sensor. The shift sensor is configured to detect the shift operation on the shift lever in accordance with a movement of the shift rod. The operation portion and the shift sensor are positioned at the same side in a manner of sandwiching the shift rod in a vehicle side view.

A bearing holding portion supporting a crankshaft in a manner to rotate freely via a bearing and fittingly holding the bearing is formed in a crankcase. A second cross section passing through a crankshaft axis line and along an orthogonal direction to a cylinder axis line is set to have a larger cross-sectional area than a first cross section passing through the crankshaft axis line and along a direction of the cylinder axis line in the bearing holding portion.

Crankcase structure of internal combustion engine

An engine includes an engine case split into an upper case and a lower case. A crankshaft and a transmission input shaft are rotatably supported at a mating surface between the upper and lower cases, and a transmission output shaft rotated by the transmission input shaft is supported in the lower case. One side face of the lower case has a circular opening through which the transmission output shaft can be inserted from the outside. An eccentric bearing holder holding a bearing that rotatably supports one end of the transmission output shaft is mounted in the opening in a detachable manner from the outside. The axis of the transmission output shaft deviates from the center of the eccentric bearing holder toward the transmission input shaft. The inner diameter of the opening is larger than the outer diameter of the largest one of transmission driven gears of the transmission output shaft.

Growing community of inventors

Hamamatsu, Japan

Kohei Kato