Kabushiki Kaisha F. C. C.

Satoru Kashiwagi

Makoto Kataoka

Shunichi Itou

Naoyuki Miwa

Ryo Egawa

Yuusuke Suzuki

A power transmitting apparatus can include a clutch housing, a plurality of driving and driven clutch plates, a clutch member, a pressure member, an intermediate member, a plurality of urging devices, and a back-torque limiting cam. The power transmitting apparatus can further include an urging force cut-off device for cutting-off the urging force applied to the pressure member from particular urging devices of the plurality of urging devices by separating the inner ends of the particular urging devices from the pressure member when the intermediate member is moved toward the pressure member by the action of the back-torque limiting cam.

Power transmitting apparatus

A method for manufacturing a power transmitting apparatus by molding both the pressure-contact assist cam and back-torque limiting cam even though either one of the pressure-contact assist cam and back-torque limiting cam is molded as a reverse-draft surface. The power transmitting apparatus has a clutch housing () and a clutch member () connected to an output member (). A plurality of driven clutch plates () alternately is arranged between the driving clutch plates () of the clutch housing. The pressure plate () and the clutch member () are, respectively, formed with through windows () and () at positions corresponding to the pressure-contact assist cams () and () and the back-torque limiting cams () and () to form reverse-draft surfaces of the pressure-contact assist cams () and () and the back-torque limiting cams () and () by inserting pin-shaped cores into the windows () and ().

Method for manufacturing a power transmitting apparatus

A power transmitting apparatus has a clutch housing (). A clutch member (), connected to an output member (), has a plurality of driven clutch plates () alternately arranged between driving clutch plates () of the clutch housing (). A rotational force, inputted to the input member (), can be transmitted to or cut-off from the output member () via pressure-contact or release between the driving clutch plates () and driven clutch plates (). Pressure-contact assist cams and back-torque limiting cams are formed on a pressure plateand the clutch member. The gradient angle (&#x3b1;) of the back-torque limiting cams is formed larger than the gradient angle (&#x3b1;) of the pressure-contact assisting cams.

A power transmitting apparatus which can reduce the number of parts in the apparatus and simplify the structure of the apparatus and thus reduce the manufacturing cost of the apparatus as well as reduce the size of the apparatus when compared with its torque transmitting capacity. The apparatus has a clutch housing (), a clutch member (), a pressure plate (), stopper portions () each fitting in a recess () formed on the inner peripheral wall of the clutch member () and limiting the rotation of the pressure plate (). When a rotational force inputted to a gear () is transmitted to or cut off from a shaft (), via pressure-contact or release between the driving clutch plates () and driven clutch plates (), the stopper portions () and the recesses () are provided with pressure-contact assisting cams to increase the pressure-contacting force between the driving clutch plates () and driven clutch plates () or provided with back-torque limiting cams to release the connection between the driving clutch plates () and the driven clutch plates ().

Growing community of inventors

Shizuoka, Japan

Satoru Kashiwagi