| 摘要 |
PROBLEM TO BE SOLVED: To simplify assembly and allow magnetic flux generated by a magnet to flow preferentially toward a magnetic sensor. SOLUTION: The torsional torque measuring apparatus comprises a first shaft body 12, a permanent magnet 14 fixed to the first shaft body 12, a second shaft body 18, magnetic cores 20, 22 fixed to the second shaft body 18, a coupling rod 16 for coupling the first shaft body 12 and the second shaft body 18, and the magnetic sensor 30 which is arranged within a magnetic circuit including the permanent magnet 14 and the magnetic cores 20, 22 and detects a change in magnetic flux caused by the rotational relative displacement between the permanent magnet 14 and the magnetic cores 20, 22. The magnetic sensor 30 is arranged on the outer periphery of the magnetic cores 20, 22 with it sandwiched between magnetic substances 32, 34, which are arranged so that magnetic flux flowing through between the magnetic cores 20, 22 to be preferentially concentrated on the magnetic sensor 30. COPYRIGHT: (C)2008,JPO&INPIT
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