Patent ID: 6111404
Filing Date: 2000-08-29
Classification: F16H,G01D,G01P

Abstract:
A structure of a projection for an electromagnetic pick-up in a rotor, comprising:at least one projection integrally provided on one side of a rotor produced by pressing a plate material, said at least one projection causing a rotation detecting pulse to be generated in an electromagnetic pick-up disposed in proximity to said one side of said rotor, whereinsaid at least one projection is formed by pressing a portion ofthe rotor to bulge from said one side, at least one of opposite end faces of said at least one projection facing a circumferential direction of said rotor including a shear cut face, steeply rising from said one side by a shearing effect of the pressing, said shear cut face being formed as a sensing end face for said electromagnetic pick-up, andwherein said rotor is a pulley body having a recess in said one side; said projection is formed on a bottom surface of said recess; said electromagnetic pick-up is disposed to protrude into said recess so as to come close to and face said projection; and said shear cut face of said projection and a shear cut face formed on said recess of said pulley body by pressing said projection partially overlap each other to prevent a gap therebetween.