Vehicular disc brake
AssigneeHitachi Astemo, Ltd.
InventorYosuke Shiraishi
Life of this patent
Estimating the term…
Abstract
The vehicular disc brake comprises a caliper bracket 3, a caliper body 6 attached to the caliper bracket 3, and friction pads 7, 7 disposed on both sides of a disc rotor 2, and the caliper body 6 comprises an action part 6a provided with cylinder holes 6f, 6g through which a large-diameter piston 10 and a small-diameter piston 11 are inserted, and a bridge part 6c extending across the outer periphery of the disc rotor 2. Thinned parts 6n, 6p are provided respectively in positions corresponding to the pistons 10, 11 in a disc-radially inner wall 6i of the bridge part 6c. The volume of the thinned part 6b corresponding to the large-diameter piston 10 on the disc turn-out side when the vehicle is moving forward is less than the volume of the thinned part 6p corresponding to the small-diameter piston 11 on the disc turn-in side.
Claims7
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.
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 a disc turn-out side end part and a disc turn-in side end part in forward movement of the vehicle of the disc-radially inner wall of the bridge part project toward a disc-radially inner side beyond a disc-radially outer surface of the pad guide groove, and
- wherein each of the friction pads has the ear piece on the disc turn-out side in forward movement of the vehicle and the suspension piece on the disc turn-in side, the hanger pin that extends in the disc shaft direction across the outer periphery of the disc rotor is inserted into the suspension piece, and the disc turn-out side end part of the disc-radially inner wall of the bridge part is provided with a pad detachable groove that makes the friction pads slidable in a longitudinal direction of the friction pads with the hanger pin removed.
Dependencies are inferred from the claim text.