Patent ID: 7766131
Filing Date: 2010-08-03
Classification: F16D

Abstract:
1. A disk brake comprising: a mounting member having a pair of arms spaced apart from each other in a rotational direction of a disk, said arms extending over an outer periphery of said disk in an axial direction of said disk, said arms being provided with pad guides; a caliper slidably provided on said mounting member; a pair of friction pads slidably mounted on the arms of said mounting member through said pad guides so that said friction pads are pressed against both sides of said disk by said caliper; and an entrance-side pad spring attached to one of the arms of the mounting member and an exit-side pad spring attached to the other arm of the mounting member, said entrance-side pad spring and said exit-side pad spring resiliently supporting said friction pads between said arms; wherein said entrance-side pad spring includes: guide plate portions fitted to the associated pad guides of said mounting member to guide said friction pads axially of said disk in cooperation with said pad guides; radially urging portions for urging said friction pads in a radial direction of said disk; and circumferentially urging portions formed as wide plate-shaped members which are bent along a bent line portion from said guide plate portions obliquely radially inward of said disk and are supported resiliently by the bent line portion so that the wide plate-shaped members can abut against one side of each of said friction pads and urge said friction pads in the rotational direction of said disk, whereby the wide plate-shaped members constantly urge the other side of each of said friction pads against said exit-side pad spring, wherein said entrance-side pad spring further has claw portions that are fitted to the pad guides of said mounting member, together with said guide plate portions, said claw portions being adapted to urge said guide plate portions relative to said pad guides radially outward of said disk by resiliently contacting radially inner wall surfaces of said pad guides as viewed in a radial direction of said disk, and wherein said radially urging portions extend axially of said disk between said guide plate portions and said friction pads to urge said friction pads radially outward of said disk, and wherein said radially urging portions have projections provided at respective longitudinally intermediate portions thereof, said projections being bent radially inward of said disk, and said guide plate portions have space portions that allow said projections to abut against the radially inner wall surfaces of said pad guides when said radially urging portions are displaced radially inward of said disk so as to approach said guide plate portions.