Patent ID: 7707900
Filing Date: 2010-05-04
Classification: B62D,G01L

Abstract:
1. A torque detecting device comprising: a cylindrical magnet rotating together with one of a first shaft and a second shaft which are coaxially connected to each other; a pair of yoke rings rotating together with the other one of the first shaft and second shaft within a magnetic field formed by said cylindrical magnet; a pair of magnetic flux collecting rings surrounding the outside of said yoke rings respectively; a magnetic sensor placed between opposing surfaces of magnetic flux collecting sections provided on the respective magnetic flux collecting rings; and a magnetic shield for covering the outside of a mold member holding said magnetic flux collecting rings integrally, said magnetic shield being made of magnetic material and having sections extending in an axial direction away from both sides of said mold member, wherein said torque detecting device detects torque applied to said first shaft and second shaft based on leakage magnetic flux between said magnetic flux collecting sections which is detected by said magnetic sensor.