CPC F16D 55/2262 (2013.01) [F16D 65/0056 (2013.01); F16D 65/0068 (2013.01); F16D 65/0974 (2013.01); F16D 2055/0008 (2013.01); F16D 2055/0016 (2013.01); F16D 55/227 (2013.01); F16D 65/0087 (2013.01); F16D 2121/04 (2013.01)] | 7 Claims |
1. A vehicular disc brake comprising a caliper bracket mounted to a vehicle body fixedly, a caliper body attached to the caliper bracket, and friction pads disposed in both sides of a disc rotor, each of the friction pad having a lining and a back plate, wherein an ear piece formed on each of the friction pads is slidably supported by a pad guide groove extending in a disc shaft direction formed in the caliper bracket or the caliper body, and wherein the caliper body has an action part with a plurality of cylinder holes into which a plurality of pistons is inserted and a bridge part extending across an outer periphery of the disc rotor,
wherein thinned parts are provided in positions corresponding to the pistons in a disc-radially inner wall of the bridge part and a volume of one of the thinned parts on a disc turn-in side in forward movement of a vehicle is different from a volume of another of the thinned parts on a disc turn-out side,
wherein one of the pistons that is disposed closest to the disc turn-out side in forward movement of the vehicle is formed to have a larger diameter than the other pistons and one of the thinned parts that corresponds to the one of the pistons that has the larger diameter and is disposed closest to the disc turn-out side has a smaller volume than the other thinned parts, and
wherein a central line in a disc peripheral direction of the lining is formed so as to be offset to the disc turn-out side with respect to a cylinder hole middle line that connects a center of the disc rotor to a middle point between a center of one of the cylinder holes into which the one of the pistons that has the larger diameter is inserted and a center of one of the cylinder holes into which another of the pistons disposed closest to the disc turn-in side in forward movement of the vehicle is inserted.
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