| 摘要 |
A torque detecting apparatus for an electrical power steering system, having a steering wheel, a first steering shaft connected to the steering wheel, a second steering shaft connected to a vehicle wheel to be steered, an electric motor connected to the second steering shaft, and a controller for operating the motor to produce a driving force corresponding to a torque detected by the torque detecting apparatus. The apparatus comprises: an elastic coupling having an elastic member, and coupling the steering shafts while permitting relative rotation of the steering shafts through elastic deformation of the elastic member; a first and a second detector shaft supported rotatably relative to each other; a first and a second speed-up device for increasing angular velocities of rotary movements of the first and the second steering shafts and transmitting the rotary movements to the first and second detector shafts, respectively; and a detector associated with the detector shafts to detect an angle of relative rotation of the detector shafts and thereby detect the steering torque, and producing an electric signal representative of the torque, said signal being applied to the controller.
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