VEHICLE DISC BRAKE

摘要

One embodiment provides a vehicle disc brake including: a caliper body; a caliper bracket having a pair of caliper support arms; a pair of friction pads; and a pad return spring. Each caliper support arm has a pair of pad guide grooves, and a pair of lug pieces extending from the friction pad are supported movably therein. An outer surface of each lug piece is stepped such that a projecting length on a radially outer side is shorter than a projecting length on a radially inner side, thereby defining a space portion between the lug piece and the pad guide groove. A first imaginary line, which is defined to pass a gravity center of the friction pad and to intersect perpendicularly a center line connecting a center of a disc rotor and a center of a piston, passes the space.

主权项

1. A vehicle disc brake including:
a caliper body; a caliper bracket which is fixed to a vehicle body, and which has a pair of caliper support arms extending to straddle an outer edge of a disc rotor in an axial direction thereof, each caliper support arm having a pair of pad guide grooves; a pair of friction pads which is disposed at each side of the disc rotor, each friction pad having a backing plate, the backing plate having a pair of lug pieces extending from side portions thereof, the lug pieces being supported movably in the pad guide grooves; and a pad return spring which is disposed between the lug pieces and the caliper support arms to bias the friction pad so as to move away from the disc rotor when the brake is released, wherein an outer surface of each lug piece in a rotating direction of the disc rotor has a stepped shape in which a projecting length on a radially outer side is shorter than a projecting length on a radially inner side, and a space portion is defined between the radially outer side of the lug piece and the pad guide groove, and wherein the space portion is disposed in a position where a first imaginary line passes, the first imaginary line being defined to pass a gravity center of the friction pad and to intersect perpendicularly a center line connecting a center of the disc rotor and a center of a piston.