Patent ID: 6688006
Filing Date: 2004-02-10
Classification: G01D

Abstract:
A device for detecting an angle of rotation comprising:a rotational angle detecting device including first and second rotational angle detectors and operable to detect the angle of rotation between the first and second rotational angle detectors; a generally cup-shaped housing having an opening leading into a hollow defined therein, wherein the housing is a one-piece structure having a bottom wall and a side wall, said first rotational angle detector being disposed at the bottom wall of the housing, a rotary shaft having first and second ends opposite to each other, said second rotational angle detector being mounted on the first end of the rotary shaft within the hollow of the housing, a first portion of the rotary shaft adjacent the second end extending outwardly from the opening of the housing; and at least one bearing accommodated within the hollow of the housing under a pre-loaded condition for rotatably supporting the rotary shaft; a discrete stop ring; and a sealing member; wherein the at least one bearing includes first and second bearings positioned within the hollow of the housing one above the other in a direction parallel to the rotary shaft, each of the first and second bearings having outer and inner races with a plurality of rolling elements interposed therebetween, the first bearing being positioned adjacent the opening of the hollow of the housing; and wherein said stop ring is positioned between the outer race of the first bearing and the seal member, and is used to secure the outer race of the first bearing to the housing, and said sealing member is used to fill up an annular space between an inner peripheral surface of the housing adjacent the opening and an outer peripheral surface of the rotary shaft.