US 12,240,425 B2
Compact electromechanical brake
Lennart Witte, Strasbourg (FR); and Julien Daclat, Lieusaint (FR)
Assigned to HITACHI ASTEMO FRANCE, Drancy (FR)
Appl. No. 17/596,165
Filed by HITACHI ASTEMO FRANCE, Drancy (FR)
PCT Filed Jun. 3, 2020, PCT No. PCT/FR2020/050950
§ 371(c)(1), (2) Date Dec. 3, 2021,
PCT Pub. No. WO2020/245543, PCT Pub. Date Dec. 10, 2020.
Claims priority of application No. 1906068 (FR), filed on Jun. 7, 2019.
Prior Publication US 2022/0234564 A1, Jul. 28, 2022
Int. Cl. B60T 13/58 (2006.01); B60T 1/06 (2006.01); B60T 13/74 (2006.01); F16D 51/22 (2006.01); F16D 51/24 (2006.01); F16D 65/22 (2006.01); F16D 121/04 (2012.01); F16D 121/24 (2012.01); F16D 125/40 (2012.01); F16D 127/02 (2012.01)
CPC B60T 13/588 (2013.01) [B60T 1/067 (2013.01); B60T 13/746 (2013.01); F16D 51/22 (2013.01); F16D 51/24 (2013.01); F16D 65/22 (2013.01); F16D 2121/04 (2013.01); F16D 2121/24 (2013.01); F16D 2125/40 (2013.01); F16D 2127/02 (2013.01); F16D 2250/0084 (2013.01)] 6 Claims
OG exemplary drawing
 
1. An electromechanical brake comprising:
at least one frictional member for contacting a friction part rotatably integral with the wheel,
at least one actuator configured to apply said frictional member against said friction part, and
an electric motor configured to activate said actuator,
said actuator including a screw-nut assembly and at least one movable element upon activating the actuator, said movable element being movable between a braking position, in which the frictional member is in contact with the friction part, and a position beyond a release position, in which said frictional member is no longer in contact with the friction part,
wherein said actuator includes stop means arranged only in the actuator and such that said movable element bears against said stop means, when it assumes a position beyond the release position, and wherein the electric motor is controlled, in the brake release phase, to activate the actuator until the movable element bears against the stop means,
wherein the brake is a drum brake including a drum, a backing plate, and two brake shoes, wherein the actuator is attached to the backing plate, and
wherein the actuator further includes two pistons, wherein each piston is configured to bear against a brake shoe.