Patent ID: 11953068
Assignee: HYUNDAI MOBIS CO., LTD.
Field: Mechanical elements (Mechanical engineering)
Classification: CPC B  F | IPC B  F

Claim 0:
1. A parking brake apparatus for a vehicle, comprising:
a motor section configured to generate power;
a power transmission section configured to rotate by driving of the motor section;
a pair of pressing units configured to receive power from the power transmission section, and press a brake pad;
a load transmission unit installed between the pair of pressing units, connected to each of the pair of pressing units, and configured to transmit a pressing load of any one of the pair of pressing units to the other pressing unit; and
a transmission gear section restraint unit configured to selectively restrain driving of the load transmission unit in conjunction with rotation of the power transmission section,
wherein:
each of the pair of pressing units comprises:
a sun gear section configured to rotate by receiving power from the power transmission section;
a planetary gear section configured to rotate by being meshed with the sun gear section;
a carrier section coupled to the planetary gear section; and
a piston section connected to the carrier section, and configured to press the brake pad by being moved toward the brake pad through receiving rotational power from the planetary gear section;
the power transmission section comprises a small diameter transmission gear which is rotated by driving of the motor section, transmits power to the sun gear section through a connection gear section, and is coupled to the transmission gear section restraint unit;

the small diameter transmission gear and the connection gear section are formed in the shapes of helical gears; and
the small diameter transmission gear moves the transmission gear section restraint unit by being moved relative to the connection gear section when being rotated.