Komatsu Corporation

Takeshi Nishide

Daijiro Ito

Hiroshi Yamamoto

A bush is provided at its sliding surface with oil-supply groove portions. An area ratio of the oil-supply groove portions to the sliding surface of the journal shaft is set to 30 to 90%. A length Lbetween the oil-supply groove portions in a circumferential direction and an inner diameter D of the bearing satisfy L&#x3c;&#x3c0;D/36. Even in a bearing device in which the journal shaft and the bush mutually rotate in a predetermined angle range or in which the journal shaft and the bush relatively and continuously rotate, the present invention can effectively be used while maintaining the existing sizes of the journal shaft and the bush, and it is possible to prevent partial break of oil film or shortage of oil film.

Growing community of inventors

Kanagawa-ken, Japan

Takeshi Nishide