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AssigneeMitsubishi Denki Kabushiki Kaisha
InventorsKatsuaki Yasui, Yutaka Ohashi
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A torque sensing unit, sensor unit, and method for manufacturing the torque sensing unit. The torque sensing unit includes a first shaft and a second shaft rotatably arranged in a coaxial fashion, and a torsion bar for allowing a rotational displacement in response to a torque between the first shaft and the second shaft. Magnetic elements are used in conjunction with the shafts for sensing a reluctance which is changed in compliance with rotational phase differences between the magnetic elements. A sensor module is prepared in which the magnetic elements are temporarily fixed to have a predetermined neutral rotational phase difference. This temporary fixture is released after the first shaft 1, the second shaft 2, the torsion bar 3, and the sensor module have been assembled.
A sensor module comprising a part of a torque sensing unit which comprises a first shaft and a second shaft rotatably arranged in a coaxial manner to oppose each other, an elastic member for allowing a rotational displacement in response to a torque between said first shaft and said second shaft, a first magnetic element of a plurality of magnetic elements rotated in a same phase as said first shaft and other magnetic elements of the plurality of magnetic elements rotated in a same phase as said second shaft, and coils for sensing reluctances which are changed in compliance with rotational phase differences between said first and said other magnetic elements, so as to sense the torque acting between said first shaft and said second shaft, wherein said first magnetic element rotated in the same phase as said first shaft and said other magnetic elements rotated in the same phase as said second shaft are temporarily fixed to have a predetermined rotational phase difference.
A torque sensing unit which comprises a first shaft and a second shaft rotatably arranged in a coaxial manner to oppose each other, an elastic member for allowing a rotational displacement in response to a torque between said first shaft and said second shaft, a first of a plurality of magnetic elements rotated in a same phase as said first shaft and other magnetic elements of the plurality of magnetic elements rotated in a same phase as said second shaft, and coils for sensing reluctances which are changed in compliance with rotational phase differences between said first and said other magnetic elements, so as to sense the torque acting between said first shaft and said second shaft, said torque sensing unit comprising:
Dependencies are inferred from the claim text.