US 11,791,695 B2
Electric actuator
Shinsuke Hirano, Shizuoka (JP); Yoshinori Ikeda, Shizuoka (JP); and Tatsunori Shimizu, Shizuoka (JP)
Assigned to NTN CORPORATION, Osaka (JP)
Appl. No. 16/972,730
Filed by NTN Corporation, Osaka (JP)
PCT Filed Jun. 24, 2019, PCT No. PCT/JP2019/024962
§ 371(c)(1), (2) Date Dec. 7, 2020,
PCT Pub. No. WO2020/004330, PCT Pub. Date Jan. 2, 2020.
Claims priority of application No. 2018-124566 (JP), filed on Jun. 29, 2018.
Prior Publication US 2021/0257886 A1, Aug. 19, 2021
Int. Cl. H02K 11/01 (2016.01); H02K 11/215 (2016.01); F16H 57/02 (2012.01); G01D 5/14 (2006.01); H02K 7/06 (2006.01); F16H 25/22 (2006.01); F16H 25/20 (2006.01)
CPC H02K 11/0141 (2020.08) [F16H 57/02 (2013.01); G01D 5/145 (2013.01); H02K 7/06 (2013.01); H02K 11/215 (2016.01); F16H 25/2204 (2013.01); F16H 2025/2031 (2013.01); F16H 2025/2081 (2013.01); F16H 2057/02034 (2013.01); F16H 2057/02082 (2013.01)] 19 Claims
OG exemplary drawing
 
1. An electric actuator comprising:
a motor; and
a motion conversion mechanism configured to convert a rotary motion generated by driving the motor into a predetermined motion,
wherein the motion conversion mechanism has a movable part configured to perform the predetermined motion,
the movable part is provided with a magnet as a sensor target, and a magnetic sensor configured to detect position information of the magnet is disposed around the magnet,
a magnetic shield plate is disposed between the motor and the magnetic sensor, and
an outer surface of the motor and an inner surface of the magnetic shield plate face each other with a predetermined gap between the outer surface of the motor and the inner surface of the magnetic shield plate.