Patent ID: 6533080
Filing Date: 2003-03-18
Classification: F16D

Abstract:
A floating caliper type disc brake comprising:a support member fixed to a vehicle body and arranged adjacent to a rotor rotatable with a wheel, said support member including a run-in side support engaging section arranged in an end section on a rotor run-in side thereof and a run-out side support engaging section arranged in an end section on a rotor run-out side thereof, the run-in side and run-out side support engaging sections being respectively formed into a substantially L-shaped engaging protrusion having a rising section arranged in the radial direction of the rotor and a bent section bent at a tip end of the rising section in the circumferential direction of the rotor; a pair of pads arranged on both sides of the rotor opposing to each other, each pad including a back plate, a lining on a face on one side of the back plate opposing to the side of the rotor, a run-in side pad engaging section arranged in a run-in side end section of the back plate being slidably engaged with the rotor run-in side support engaging section, and a run-out side pad engaging section arranged in a run-out side end section of the back plate being slidably engaged with the rotor run-out side support engaging section, the run-in side and run-out side pad engaging sections being respectively formed into a substantially L-shaped engaging groove corresponding to the engaging protrusion, so that the run-in side and run-out side pad engaging sections can be freely slid in the axial direction of the rotor; a caliper supported by said support member and freely displaced in the axial direction of the rotor; and a piston housed in said caliper and freely pushed out toward the rotor according to supply of hydraulic fluid into said caliper, wherein braking is conducted by pushing said pair of pads against both sides of the rotor when said piston is pushed out, and wherein a correlation of a distance between the run-in side and run-out side support engaging sections with a distance between the run-in side and run-out side pad engaging sections is restricted so that at least one of said pad engaging sections bears a brake torque with one of the run-in side and run-out side support engaging sections when the brake torque according to a frictional force caused between the side of the rotor and the lining of said pad is not higher than a predetermined value, and both said pad engaging sections the brake torque with both the run-in side and run-out side support engaging sections when the brake torque according to the frictional force caused between the side of the rotor and the lining of said pad exceeds the predetermined value.