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Torque detecting apparatus

  • US 4,874,053 A
  • Filed: 06/22/1988
  • Issued: 10/17/1989
  • Est. Priority Date: 06/22/1987
  • Status: Expired due to Fees
First Claim
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1. A torque detecting apparatus comprising:

  • a driving shaft and a driven shaft connected coaxially with said driving shaft by a torsion bar;

    a first drum fitted on said driving shaft and a second drum fitted on said driven shaft;

    magnetic signals recorded on the surface of said first and second drums; and

    a magnetic sensor for detecting the rotational angles of said first and second drums in a non-contact manner, said apparatus detecting a torque from a difference of rotational angles of said first and second drums, wherein said driving shaft and driven shaft are connected at free end portions thereof by a coupling bearing so that said shafts are allowed to have a relative rotation, and wherein said first and second drums are fitted on the external circumference of free ends of said driving shaft and driven shaft.

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