Structure of magnetostrictive torque sensor applicable to sensor

Details Structure of magnetostrictive torque sensor applicable to sensor Structure of magnetostrictive torque sensor applicable to sensor

1994-11-01

1996-06-18

Chilcot, Richard

Measuring and testing

Dynamometers

Responsive to torque

73862333, 73862334, G01L 302

Patent

active

055267041

ABSTRACT:
A structure of a magnetostrictive torque sensor is disclosed in which an outer casing; a magnetostrictive shaft supported rotatably by the outer casing via a bearing member and having at least one magnetic anisotropy portion formed thereon; and a resin casing which is installed within the outer casing so as to enclose an outer peripheral end of the magnetostrictive shaft, said resin casing integrating at least pairs of core members, coil-wound bobbins, and excitation and detection coils wound on the coil-wound bobbins by means of a resin molding. In the structure described above, a positional deviation of such the coil bobbins, core members, and so on with respect to the magnetostrictive shaft is prevented by means of a plurality of elastic spacer members or such coil bobbin positioning members. Thus, the positional deviations of the core members and coils in an axial direction of the shaft do not occur. The magnetostrictive shaft is connected between intermediate ends of a rotatable shaft so that a magnitude and direction of a torque applied to the shaft can be measured using an external detection circuitry connected to the coils.

REFERENCES:
patent: 4887461 (1989-12-01), Sugimoto et al.
patent: 4899597 (1990-02-01), Yagi et al.
patent: 4907462 (1990-03-01), Obama et al.
patent: 4962672 (1990-10-01), Yagi et al.
patent: 5255567 (1993-10-01), Miyake et al.
patent: 5307691 (1994-05-01), Miyake et al.

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