US 11,965,586 B2
Electromechanical actuator
Bo Lundstrom, Glumslov (SE); and Lars Severinsson, Hishult (SE)
Assigned to BORGWARNER SWEDEN AB, (SE)
Appl. No. 16/964,808
Filed by BorgWarner Sweden AB, Landskrona (SE)
PCT Filed Jan. 25, 2019, PCT No. PCT/EP2019/051832
§ 371(c)(1), (2) Date Jul. 24, 2020,
PCT Pub. No. WO2019/145465, PCT Pub. Date Aug. 1, 2019.
Claims priority of application No. 1850084-3 (SE), filed on Jan. 25, 2018; and application No. 1850419-1 (SE), filed on Apr. 13, 2018.
Prior Publication US 2021/0033184 A1, Feb. 4, 2021
Int. Cl. F16H 48/22 (2006.01); F16D 28/00 (2006.01); F16H 48/34 (2012.01); F16D 121/24 (2012.01); F16D 125/36 (2012.01); F16D 125/48 (2012.01); F16D 125/52 (2012.01); F16D 125/58 (2012.01)
CPC F16H 48/22 (2013.01) [F16D 28/00 (2013.01); F16H 48/34 (2013.01); F16D 2121/24 (2013.01); F16D 2125/36 (2013.01); F16D 2125/48 (2013.01); F16D 2125/52 (2013.01); F16D 2125/582 (2013.01)] 22 Claims
OG exemplary drawing
 
1. An electromechanical actuator, comprising an electrical motor, a first rotational member being in driving connection with the electrical motor, a second rotational member being connected to the first rotational member by means of a plurality of rolling elements such that the first rotational member and the second rotational member together form a ball ramp mechanism, and a return spring pressing the first and second rotational members towards each other, wherein the ball ramp mechanism is configured to allow for mutual rotation of the first and second rotational member up to a first torque of the electrical motor, and to allow for axial separation of the first and second rotational members at a second torque of the electrical motor.