Patent ID: 8281904

Claim:
A disk brake for vehicles, comprising: a disk rotatable along with each wheel of a vehicle; a movable frictional pad configured to press against one side of the disk to generate a braking force; a wedge member having the movable frictional pad attached to one side thereof, the wedge member being movable to the rotation direction of the disk by a drive motor to generate a power such that the wedge member advances to the disk; and a guide member to guide the wedge member such that the wedge member advances to the disk, wherein the disk brake further comprises: a gap adjuster to uniformly maintain a gap between the movable frictional pad and the disk, wherein the gap adjuster includes a sensing unit to sense the advance of the wedge member by more than a predetermined distance from the guide member, at the time of braking, due to the wear of the movable frictional pad, and a moving unit to move the guide member to the disk based on the sensing result of the sensing unit, the sensing unit includes a push rod configured to be pushed by the wedge member such that the push rod performs a rectilinear movement, and the moving unit includes a gear configured to rotate while engaging with one end of the push rod, a screwed connection shaft connected to the gear, and a nut fitted on the screw of the connection shaft to perform an advance and retreat movement.