US 11,668,362 B2
Actuator and brake
Toshiki Fukasawa, Kanagawa (JP)
Assigned to SUMITOMO HEAVY INDUSTRIES, LTD., Tokyo (JP)
Filed by SUMITOMO HEAVY INDUSTRIES, LTD., Tokyo (JP)
Filed on Jun. 23, 2021, as Appl. No. 17/355,894.
Claims priority of application No. JP2020-108304 (JP), filed on Jun. 24, 2020.
Prior Publication US 2021/0404525 A1, Dec. 30, 2021
Int. Cl. B60T 13/74 (2006.01); F16D 65/18 (2006.01); F16D 65/12 (2006.01); F16D 55/224 (2006.01); F16D 65/847 (2006.01); B25J 19/00 (2006.01); F16D 121/24 (2012.01); F16D 125/50 (2012.01)
CPC F16D 65/186 (2013.01) [F16D 55/224 (2013.01); F16D 65/123 (2013.01); F16D 65/847 (2013.01); B25J 19/0004 (2013.01); F16D 2121/24 (2013.01); F16D 2125/50 (2013.01)] 18 Claims
OG exemplary drawing
 
14. An actuator comprising:
a motor;
a brake;
a motor casing that accommodates a constituent member of the motor;
a brake casing that accommodates a constituent member of the brake;
a speed reducer that decelerates a rotating motion transmitted from the motor; and
a speed reducer casing that accommodates a constituent member of the speed reducer,
wherein the motor casing and the brake casing are connected to each other, the brake includes a stator having a coil and a coil case, and a friction plate, a minimum outer diameter of the coil case is 70 mm or less, and a value obtained by dividing a distance from a first end surface of the friction plate on a side farthest in an axial direction from the coil case to a second end surface of the coil case on a side opposite to the first end surface by the minimum outer diameter is 0.2 or less, and
the brake casing and the speed reducer casing are connected to each other.