Disk brake

A disk brake for a vehicle, the 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 arm of the arms of the mounting member and an exit-side pad spring attached to the other arm of the arms of the mounting member, said one arm being the arm at the entrance-side of the disk brake in a rotational direction of the disk when the vehicle runs forward, said other arm being the arm at the exit-side of the disk brake in the rotational direction of the disk when the vehicle runs forward, 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.

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 the arms of 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 arm of the arms of the mounting member and an exit-side pad spring attached to the other arm of the arms of the mounting member, said one arm being the arm at the entrance-side of the disk brake in a rotational direction of the disk when a vehicle runs forward, said other arm being the arm at the exit-side of the disk brake in a rotational direction of the disk when a vehicle runs forward, said entrance-side pad spring and said exit-side pad spring resiliently supporting said friction pads between said arms;
• wherein each of said pad springs 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;
• and
• radially urging portions extending 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 only said entrance-side pad spring is provided with circumferentially urging portions formed as plate-shaped members extending along the axial direction of the said disk, the plate-shaped members are bent along bent line portions from said guide plate portions obliquely radially inward of said disk and are supported resiliently by the bent line portions so that the plate-shaped members can abut against one side of said friction pads, respectively, and urge said friction pads in the rotational direction of said disk, whereby the plate-shaped members constantly urge the other side of each of said friction pads resiliently against said exit-side pad spring.