Drum brake apparatus

A drum brake apparatus comprising:

• a housing;
• a main braking unit disposed on a first portion of the housing, the main braking unit configured to be, during main braking, driven by a hydraulic pressure and pressing a shoe;
• and
• a parking braking unit disposed on a second portion of the housing, the parking braking unit configured to be, during parking braking, driven by an electromotive force of an actuator and to press the shoe,
• the parking braking unit comprising:
• a bevel gear section disposed in the housing, the bevel gear section configured to rotate in association with the actuator, the bevel gear section comprising:
• a driving gear connected with the actuator;
• and
• a driven gear meshed with the driving gear;
• and
• a rod section connected with the bevel gear section, the rod section disposed to be reciprocating in and out of the housing in association with the bevel gear section while pressing the shoe, the rod section comprising:
• a rotation rod connected with the driven gear, wherein external threads are disposed on an outer surface of the rotation rod to be symmetrical to each other based on the driven gear,
• wherein the main braking unit is disposed closer to a rotation center of a back plate than the parking braking unit.