Caliper brake device for vehicle

摘要

A brake caliper (10) includes a first caliper arm (12) that opposes a first frictional surface (6a) of a vehicle wheel (5) and a second caliper arm (14) that opposes a second frictional surface (6b) of the same. A movable brake pad (7) is supported by the first caliper arm (12) and applies a braking force to the first frictional surface (6a). A plurality of pistons (55) which drive the movable brake pad (7) in accordance with expansion of a diaphragm (75) provided in the brake caliper (10), and a guide member (65) that guides displacement of the plurality of pistons (55) in a right-angle direction relative to the first frictional surface (6a) are provided, and therefore the movable brake pad (7) applies an even braking force to the vehicle wheel (5) in cooperation with a fixed brake pad (700) fixed to the second caliper arm (14).

主权项

1. A caliper brake device for a vehicle, which applies a brake to rotation of a rotary body by sandwiching a first frictional surface and a second frictional surface formed on either side of the rotary body, comprising:
a brake caliper having a first caliper arm that faces the first frictional surface and a second caliper arm that faces the second frictional surface; a movable brake pad that is supported by the first caliper arm and applies a braking force to the first frictional surface by displacing toward the first frictional surface; a pressure chamber formed in the brake caliper; a diaphragm that expands in accordance with a pressure of the pressure chamber; a plurality of pistons that drive the movable brake pad in a rotary axis direction of the rotary body in accordance with the expansion of the diaphragm; a guide member that guides a displacement of the plurality of pistons in a right-angle direction relative to the first frictional surface; a support mechanism that supports the brake caliper to be capable of displacing in the rotary axis direction of the rotary body; and a fixed brake pad that is fixed to the second caliper arm and applies a braking force to the second frictional surface in cooperation with the movable brake pad when pressure is supplied to the pressure chamber.