US 12,269,447 B2
Parking brake actuator
Prakash D Sunke, Haryana (IN); and Sudhirkumar S Karajgi, Haryana (IN)
Assigned to HL MANDO CORPORATION, Pyeongtaek si (KR)
Appl. No. 17/774,577
Filed by HL MANDO CORPORATION, Pyeongtaek-si (KR)
PCT Filed Oct. 12, 2020, PCT No. PCT/KR2020/013861
§ 371(c)(1), (2) Date May 5, 2022,
PCT Pub. No. WO2021/091101, PCT Pub. Date May 14, 2021.
Claims priority of application No. 10-2019-0140798 (KR), filed on Nov. 6, 2019.
Prior Publication US 2022/0396252 A1, Dec. 15, 2022
Int. Cl. B60T 13/74 (2006.01); F16D 65/14 (2006.01); F16D 121/22 (2012.01); F16D 121/24 (2012.01); F16D 125/50 (2012.01); F16D 127/06 (2012.01); F16H 57/02 (2012.01); F16H 57/031 (2012.01)
CPC B60T 13/746 (2013.01) [F16D 65/14 (2013.01); F16H 57/031 (2013.01); B60T 2270/40 (2013.01); F16D 2121/22 (2013.01); F16D 2121/24 (2013.01); F16D 2125/50 (2013.01); F16D 2127/06 (2013.01); F16H 2057/02034 (2013.01); F16H 2057/02082 (2013.01)] 13 Claims
OG exemplary drawing
 
1. An actuator for a parking brake, comprising:
a motor generating power;
a reduction gear portion including a driving gear rotating in association with a drive shaft of the motor, and a sun gear coupled to the driving gear to rotate together;
a housing in which the motor and the reduction gear portion are accommodated; and
a locking portion configured to limit rotation of the reduction gear portion;
wherein the locking portion is further configured to:
a pair of locking members configured to restrain and release at least a part of a rotation shaft of the sun gear,
a plurality of elastic members supporting each of the locking members in a direction of the rotation shaft of the sun gear, and
an electromagnet member configured to separate the pair of locking members from the sun gear by generating an electromagnetic force when the power is applied,
wherein the electromagnet member is provided in a C-shape with an opening on one side thereof, and the pair of locking members is disposed in the opening, and
wherein the length of the opening of the electromagnet member is greater than that of the pair of locking members, so that the pair of locking members may receive sufficient electromagnetic force from the opening of the electromagnet member.