Electric disk brake
View Patent ↗Disclosed is an electric disc brake. The electric disc brake includes friction pads for pressing a disc, a carrier for supporting the friction pads, a caliper housing supported by the carrier such that the caliper housing moves back and forth to press the friction pads, and a pressing device for pressing the friction pads. The pressing device includes a pressing member moving back and forth in the caliper housing to press one of the friction pads, a screw shaft coupled to the pressing member, a worm wheel coupled to the screw shaft, a driving shaft crossing the screw shaft and having a worm gear engaged with the worm wheel, a motor for rotating the driving shaft in a forward direction or a reverse direction, and an auxiliary pressing device.
1. An electric disc brake, comprising:
friction pads for pressing a disc:
a carrier for supporting the friction pads;
a caliper housing supported by the carrier such that the caliper housing moves back and forth to press the friction pads; and
a pressing device for pressing the friction pads,
wherein the pressing device includes:
a pressing member moving back and forth in the caliper housing to press one of the friction pads;
a screw shaft coupled to the pressing member;
a worm wheel coupled to the screw shaft;
a driving shaft crossing the screw shaft and having a worm gear engaged with the worm wheel;
a motor for rotating the driving shaft in a forward direction or a reverse direction; and
an auxiliary pressing device,
wherein the auxiliary pressing device includes:
a first gear fitted around the driving shaft;
a second gear engaged with the first gear;
an auxiliary motor;
a third gear fitted around a shaft of the auxiliary motor; and
a third gear shaft coupled to the third gear,
wherein the second gear is coupled to the third gear shaft.