US 12,467,510 B2
Electronic parking brake
Woochul Lim, Gyeonggi-do (KR)
Assigned to HL MANDO CORPORATION, Gyeonggi-do (KR)
Appl. No. 17/602,710
Filed by HL MANDO CORPORATION, Gyeonggi-do (KR)
PCT Filed Apr. 8, 2020, PCT No. PCT/KR2020/004770
§ 371(c)(1), (2) Date Oct. 8, 2021,
PCT Pub. No. WO2020/209608, PCT Pub. Date Oct. 15, 2020.
Claims priority of application No. 10-2019-0042909 (KR), filed on Apr. 12, 2019.
Prior Publication US 2022/0163075 A1, May 26, 2022
Int. Cl. F16D 51/12 (2006.01); F16D 121/24 (2012.01); F16D 125/42 (2012.01)
CPC F16D 51/12 (2013.01) [F16D 2121/24 (2013.01); F16D 2125/42 (2013.01)] 8 Claims
OG exemplary drawing
 
1. An electronic parking brake comprising:
a drum which rotates with a wheel of a vehicle;
brake shoes installed at two sides in the drum to brake the drum;
a wheel cylinder configured to push the brake shoes to bring the brake shoes into contact with an inner circumferential surface of the drum; and
an actuator which generates driving power for driving of the wheel cylinder,
wherein the actuator includes a driving motor which generates the driving power for braking of the drum and a transmission shaft which transmits the driving power of the driving motor to the wheel cylinder, and
the electronic parking brake further comprises a first helical gear part having a transmission gear provided on the transmission shaft and a driven gear formed on the wheel cylinder and engaged with the transmission gear provided on the transmission shaft, a second helical gear part configured to transmit the driving power of the driving motor to the transmission shaft and the second helical gear part which transmits the driving power transmitted through the transmission shaft to the wheel cylinder,
a housing is provided outside the actuator; and
wherein the housing includes a first housing surrounding the driving motor and one side of the transmission shaft and a second housing surrounding the wheel cylinder and the other side of the transmission shaft,
wherein the transmission shaft comprises, a first shaft packaged within the first housing and connected to the driving motor; and
a second shaft packaged within the second housing and connected to the wheel cylinder, wherein the second shaft is fixedly coupled to the first shaft.