Patent ID: 6811002
Filing Date: 2004-11-02
Classification: F16D

Abstract:
A disc brake comprising:a pair of pads disposed on opposite sides of a disc; a caliper including a cylinder having one end closed and a piston slidably fitted within the cylinder, the piston being adapted to be slidably moved, to thereby bring the pair of pads into contact with the disc; a cam mechanism adapted to be rotated to thereby change an amount of projection of a cam rod; a push rod disposed within the cylinder, which is adapted to be pressed and moved by the cam rod; a clutch member disposed within the cylinder, which abuts against the piston while being threadably engaged with the push rod, the clutch member being adapted to be pressed by the push rod, to thereby positively perform a slidable movement of the piston relative to the cylinder; a push rod biasing member disposed within the cylinder so as to bias the push rod towards the cam mechanism; and a spring cover disposed within the cylinder, the push rod biasing member being held between the push rod and the spring cover, wherein the push rod, the push rod biasing member and the spring cover form an assembly in the form of a single cartridge, the push rod comprising a front body portion threadably engaged with the clutch member and a rear body portion engaged with the cam rod, the front body portion and the rear body portion being separable from each other, with parting surfaces thereof existing in the interior of the cartridge,a radially outer portion of the front body portion of the push rod including a rotation-preventing portion, the rotation-preventing portion being adapted to restrict rotation of the front body portion and the cylinder relative to each other in a circumferential direction of the cylinder.