Patent ID: 6452383
Filing Date: 2002-09-17
Classification: G01P,H02K

Abstract:
In a rotation sensor, having a pulse transducer seated on a rotation element (10), on a shaft of a motor drive mechanism, which transducer has a ring magnet (11) having a face end, manufactured as an injection molded part, and a metal bush (12) that by positive engagement receives the ring magnet (11) and is coaxially slipped onto the rotation element (10) and fixed radially and axially nondisplaceably on it, the improvement wherein the ring magnet (11) is received with a first annular portion (111) on the bush (12) and is seated with a second annular portion (112), having a smaller inside diameter, with a press fit on the rotation element (10); the positive engagement between the bush (12) and the first annular portion (111) being made by shaped elements (13, 14) machined onto the outer circumference of the bush (12), onto which elements the ring magnet (11) is extruded; and wherein the bush (12) is secured to the rotation element (10) in the region of a bush portion (121) that protrudes from the face end out of the ring magnet (11).