Abstract: An opposed-piston type disc brake includes a guide cylinder extending axially inward from an opening edge portion of a cylinder in which an outer displacement member of a thrust generating mechanism is disposed is provided in an inner body of a caliper at an axial inner side portion of the inner body. A clamp base portion of a clamp member of a parking mechanism portion includes a housing hole opened to an axial outer side of the clamp base portion in which an inner side displacement member of the thrust generating member is disposed. A guide cylinder extending axially inward from an opening edge portion of the cylinder is fitted into the housing hole so as to relatively move in the axial direction, to form a first guide portion which supports the clamp member so that the clamp member is displaced relative to the cylinder in the axial direction.

Abstract: An opposed-piston type disc brake includes a guide cylinder extending axially inward from an opening edge portion of a cylinder in which an outer displacement member of a thrust generating mechanism is disposed is provided in an inner body of a caliper at an axial inner side portion of the inner body. A clamp base portion of a clamp member of a parking mechanism portion includes a housing hole opened to an axial outer side of the clamp base portion in which an inner side displacement member of the thrust generating member is disposed. A guide cylinder extending axially inward from an opening edge portion of the cylinder is fitted into the housing hole so as to relatively move in the axial direction, to form a first guide portion which supports the clamp member so that the clamp member is displaced relative to the cylinder in the axial direction.

Abstract: A parking mechanism part (12) including a clamp member (39) and a thrust generation mechanism (40) is integrally arranged in a caliper (8) constituting an opposed-piston type disk brake (2a). The clamp member (39) is supported on the caliper (8) to be movable along the axial direction with respect to an inner body part (14) of the caliper (8), a spindle (45) of the thrust generation mechanism (40) is rotatably supported on the base part (42) of the clamp member (39), a nut (46) threadedly engaged with the tip end of the spindle (45) is arranged inside a combined-use piston (10) fitted in an enter-side inner cylinder (18b).

Abstract: In an opposed-piston disc brake caliper, a pair of reinforcement bridge portions, which are inclined relative to an axial direction, are provided on outside of a rotor in a radial direction of the rotor so as to define corner opening portions in an opening portion which is defined by an inner body portion, an outer body portion, and an entry-side connection portion and an exit-side connection portion connecting the inner body portion and the outer body portion. A torque receiving portion of one of the entry-side torque receiving portion and the exit-side torque receiving portion is exposed toward an outside in the radial direction via the corner opening portions.

Abstract: A parking mechanism part (12) including a clamp member (39) and a thrust generation mechanism (40) is integrally arranged in a caliper (8) constituting an opposed-piston type disk brake (2a). The clamp member (39) is supported on the caliper (8) to be movable along the axial direction with respect to an inner body part (14) of the caliper (8), a spindle (45) of the thrust generation mechanism (40) is rotatably supported on the base part (42) of the clamp member (39), a nut (46) threadedly engaged with the tip end of the spindle (45) is arranged inside a combined-use piston (10) fitted in an enter-side inner cylinder (18b).

Abstract: A disk brake pad includes a lining and a back plate supporting the lining. A first side part of the back plate in the circumferential direction includes a guided portion configured to engage movably in the axial direction with a guiding portion of a pad support member. The guided portion is disposed at a position more inward in the radial direction than a line of action of a brake tangential force applied in braking, so as to support a brake tangential force applied toward a second side part of the back plate in the circumferential direction in braking. The back plate is configured to support a brake tangential force applied toward the first side part in braking at a portion thereof that exists more outward in the radial direction than the line of action of the brake tangential force.

Abstract: In an opposed-piston disc brake caliper, a pair of reinforcement bridge portions, which are inclined relative to an axial direction, are provided on outside of a rotor in a radial direction of the rotor so as to define corner opening portions in an opening portion which is defined by an inner body portion, an outer body portion, and an entry-side connection portion and an exit-side connection portion connecting the inner body portion and the outer body portion. A torque receiving portion of one of the entry-side torque receiving portion and the exit-side torque receiving portion is exposed toward an outside in the radial direction via the corner opening portions.

Abstract: A disk brake pad includes a lining and a back plate supporting the lining. A first side part of the back plate in the circumferential direction includes a guided portion configured to engage movably in the axial direction with a guiding portion of a pad support member. The guided portion is disposed at a position more inward in the radial direction than a line of action of a brake tangential force applied in braking, so as to support a brake tangential force applied toward a second side part of the back plate in the circumferential direction in braking. The back plate is configured to support a brake tangential force applied toward the first side part in braking at a portion thereof that exists more outward in the radial direction than the line of action of the brake tangential force.