US 12,241,514 B2
Actuator for brake device and brake device including same
Woochul Lim, Yongin-si (KR); Soosung Kim, Seoul (KR); Daejune Jung, Seoul (KR); and Joon-kyu Song, Seongnam-si (KR)
Assigned to HL MANDO CORPORATION, Pyeongtaek si (KR)
Appl. No. 17/793,258
Filed by HL MANDO CORPORATION, Pyeongtaek-si (KR)
PCT Filed Jan. 19, 2021, PCT No. PCT/KR2021/000757
§ 371(c)(1), (2) Date Jul. 15, 2022,
PCT Pub. No. WO2021/153939, PCT Pub. Date Aug. 5, 2021.
Claims priority of application No. 10-2020-0010975 (KR), filed on Jan. 30, 2020.
Prior Publication US 2023/0068562 A1, Mar. 2, 2023
Int. Cl. F16D 65/18 (2006.01); B60T 13/74 (2006.01); F16D 121/24 (2012.01); F16D 125/50 (2012.01); F16D 125/52 (2012.01)
CPC F16D 65/18 (2013.01) [B60T 13/741 (2013.01); F16D 2121/24 (2013.01); F16D 2125/50 (2013.01); F16D 2125/52 (2013.01)] 15 Claims
OG exemplary drawing
 
1. An actuator for a brake device, comprising:
a housing accommodating a motor, a power transmission unit connected to the motor, and a reduction gear unit connected to the power transmission unit; and
a cover covering an open top of the housing and having a shaft support portion;
wherein the reduction gear unit comprises:
a worm wheel rotating by receiving power from the power transmission unit, the worm wheel including a concave receiving groove on an upper surface thereof and a locking rib provided in the receiving groove,
a sun gear supported rotatably on a bottom of the receiving groove and having a support rib contactable with the locking rib during rotation, and
a clutch spring provided in a state of being slidably wound around an outer circumferential surface of the shaft support portion and configured to tighten or loosen selectively an outer circumferential surface of the shaft support portion by coming into contact with at least one of the support rib and the locking rib according to a rotation direction when the worm wheel and the sun gear are rotated relative to each other.