US 12,071,985 B2
Clutch actuator
Hirohisa Noda, Kariya (JP); Ryo Ishibashi, Kariya (JP); and Akira Takagi, Kariya (JP)
Assigned to DENSO CORPORATION, Kariya (JP)
Filed by DENSO CORPORATION, Kariya (JP)
Filed on Dec. 7, 2023, as Appl. No. 18/532,909.
Application 18/532,909 is a continuation of application No. PCT/JP2022/024318, filed on Jun. 17, 2022.
Claims priority of application No. 2021-108818 (JP), filed on Jun. 30, 2021; and application No. 2022-013265 (JP), filed on Jan. 31, 2022.
Prior Publication US 2024/0102517 A1, Mar. 28, 2024
Int. Cl. F16D 23/12 (2006.01); F16D 28/00 (2006.01)
CPC F16D 23/12 (2013.01) [F16D 28/00 (2013.01); F16D 2023/123 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A clutch actuator for a clutch device that includes a clutch installed between a first transmission element and a second transmission element, which are configured to make relative rotation between the first transmission element and the second transmission element, while the clutch is configured to shift a state between:
a coupled state where transmission of a torque between the first transmission element and the second transmission element is enabled; and
a decoupled state where the transmission of the torque between the first transmission element and the second transmission element is blocked, the clutch actuator comprising:
a housing that is placed at an inside space of a case which is configured to be installed on a vehicle, wherein the housing includes:
a housing plate portion that is configured to contact a case plate portion of the case; and
a receiving space that is located on one side of the housing plate portion which is opposite to the case plate portion;
an electric motor that is placed at the receiving space and is configured to output a torque of rotation in response to supply of an electric power to the electric motor; and
a rotation-to-translation converter that is configured to convert a rotating motion, which is generated by the torque transmitted from the electric motor, into a translating motion to shift the state of the clutch to the coupled state or the decoupled state, wherein:
the housing includes:
a housing ventilation hole that extends through the housing plate portion and communicates between an outside space of the housing and the receiving space; and
a breathable filter that is placed on a side of the housing ventilation hole, at which the case plate portion is placed, to cover the housing ventilation hole, wherein the breathable filter is configured to permit a gas to pass through the breathable filter; and
the breathable filter is placed between the housing plate portion and the case plate portion on the side of the housing ventilation hole at which the case plate portion is placed.