US 12,246,688 B2
Brake actuator
Kyung Won Kim, Seongnam-si (KR)
Assigned to HL MANDO CORPORATION, Peongtaek-si (KR)
Appl. No. 17/636,170
Filed by HL MANDO CORPORATION, Pyeongtaek-si (KR)
PCT Filed Aug. 19, 2020, PCT No. PCT/KR2020/011049
§ 371(c)(1), (2) Date Feb. 17, 2022,
PCT Pub. No. WO2021/045412, PCT Pub. Date Mar. 11, 2021.
Claims priority of application No. 10-2019-0108112 (KR), filed on Sep. 2, 2019.
Prior Publication US 2022/0297657 A1, Sep. 22, 2022
Int. Cl. B60T 13/74 (2006.01); F16D 55/226 (2006.01); F16D 65/18 (2006.01); F16D 121/04 (2012.01); F16D 121/24 (2012.01); F16D 125/06 (2012.01); F16D 125/40 (2012.01)
CPC B60T 13/741 (2013.01) [F16D 55/226 (2013.01); F16D 65/183 (2013.01); F16D 2121/04 (2013.01); F16D 2121/24 (2013.01); F16D 2125/06 (2013.01); F16D 2125/40 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A brake actuator configured to press or release a piston toward a brake pad and be controlled by an electrical signal, the brake actuator comprising:
a power generating part provided to generate power by an electrical signal;
a spindle member provided to rotate by receiving power from the power generating part and having a first screw portion formed on an outer circumferential surface; and
a nut member provided to press or release the piston, the nut member having a second screw portion formed on an inner circumferential surface to be engaged with the first screw portion,
wherein a size of a pitch between adjacent threads of the second screw portion repeatedly increases and decreases in a constant cycle along a rotation direction such that a load applied to the power generation part is cyclically changed during rotation of the spindle member.