| 摘要 |
<p>Disclosed is a torque sensor of an electric power steering apparatus. According to an embodiment of the present invention, the torque sensor of an electric power steering apparatus comprises: a housing; a first rotor; a second rotor; and a printed circuit board wherein the electric power steering apparatus has a steering shaft having an input and an output shaft to steer, and the torque sensor arranged between the input and the output shaft. The first rotor in the housing is coupled to the input shaft, and has a first coupler. The second rotor in the housing is coupled to the output shaft, and has a second coupler. The printed circuit board has an oscillation and a reception coil arranged between the first and the second rotor of the housing, generating and receiving a magnetic flux; and a magnetic element detecting the magnetic flux varied depending on a relative rotation between the first and the second coupler. At least one of the first and the second rotor has a trigger and a key pin protrusion formed on the inner circumferential surface thereof, wherein the trigger is capable of preventing a longitudinal separation of the steering shaft; and the key pin protrusion is capable of preventing a radial separation of the steering shaft. According to the present invention, the rotors can simply and firmly be coupled to the steering shaft.</p> |
