US 11,835,097 B2
Power transmission apparatus
Katsu Yoshimoto, Hamamatsu (JP); Masayuki Nonaka, Hamamatsu (JP); Yoshihiko Ozawa, Hamamatsu (JP); and Han Hiong Chen, Hamamatsu (JP)
Assigned to KABUSHIKI KAISHA F.C.C., Shizuoka (JP)
Appl. No. 17/918,394
Filed by Kabushiki Kaisha F.C.C., Hamamatsu (JP)
PCT Filed Sep. 14, 2020, PCT No. PCT/JP2020/034739
§ 371(c)(1), (2) Date Oct. 12, 2022,
PCT Pub. No. WO2021/210194, PCT Pub. Date Oct. 21, 2021.
Claims priority of application No. 2020-071888 (JP), filed on Apr. 13, 2020.
Prior Publication US 2023/0135364 A1, May 4, 2023
Int. Cl. F16D 43/12 (2006.01); F16D 13/52 (2006.01); B60K 17/02 (2006.01); F16D 47/00 (2006.01)
CPC F16D 43/12 (2013.01) [B60K 17/02 (2013.01); F16D 13/52 (2013.01); F16D 47/00 (2013.01); F16D 2300/10 (2013.01); F16D 2300/12 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A power transmission apparatus comprising:
a clutch housed in a clutch housing that rotates together with an input that rotates due to a driving force of an engine of a vehicle, the clutch housing including a plurality of driving clutch plates attached thereto, the clutch being provided on its outer peripheral surface with a spline-fitting portion to which inner peripheral edges of a plurality of driven clutch plates are fitted, the driven clutch plates being alternately arranged with the driving clutch plates, the clutch being connected to an output that is able to rotate a wheel of the vehicle; and
a pressure applicator movable between an operating position where the driving and driven clutch plates are pressed against each other so as to enable transmission of the driving force of the engine to the wheel and a non-operating position where a pressing force exerted on the driving and driven clutch plates is released so as to cut off transmission of the driving force of the engine to the wheel, the pressure applicator being movable relative to the clutch including the spline-fitting portion; wherein
an auxiliary clutch plate smaller in diameter than the inner peripheral edges of the driven clutch plates is located on the output;
when the driving and driven clutch plates are pressed against each other, the auxiliary clutch plate is pressed to enable transmission of the driving force of the engine to the wheel; and
when the pressing force exerted on the driving and driven clutch plates is released, a pressing force exerted on the auxiliary clutch plate is released to cut off transmission of the driving force of the engine to the wheel.