To reduce the entire weight of a clutch case, and to form an outer circumference of the clutch case in a cylindrical shape of simple configuration.
In multi-plate clutches (20 and 40) to transmit a power by applying the tightening load to friction engagement elements in which the friction engagement elements (3 and 7) are disposed on the inner circumference of a clutch case (5), tone wheels (2, 22, 32 and 42) are provided on an outer circumference of the clutch case. Further, in an attaching structure of a rotational speed detection sensor for detecting a rotational speed of a multi-plate clutch provided with a clutch case (5) having a substantially cylindrical portion on the outer circumference, the cylindrical portion is provided with an oil port (16) opened to the outer circumference and adapted to discharge lubricating oil, and the rotational speed detection sensor (4) is attached to a position opposed to the oil port so that the rotational speed is detected by detecting the position of the oil port.
KINOSHITA YOSHIO
NAKAGOME HIROFUMI
Nobuaki Kato
Kazuo
Shinichi Usui
Ikuo Fujino
Takao Ochi
Teruhisa Motomiya
Norimichi Takanashi
Asahi Shinmitsu
Seiichiro Takahashi
Koji Yoshizawa