Torque transducer
AssigneeKubota Corporation
InventorsKatsuyuki Miyake, Tomoyoshi Sawada, Mutsumi Sunahata
Life of this patent
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Abstract
A torque transducer including a ferromagneto-stricting device provided for a rotational shaft, a magnetic field supply device for supplying a magnetic field to the ferromagneto-stricting device, a sensing device for sensing a change in the magnetic permeability of the ferromagneto-stricting device caused by torque applied to the rotational shaft, a fixed housing for rotatably supporting the rotational shaft, an electromagnetic shielding device for electrically shielding the magnetic field supply device and the sensing device, and a spacer interposed between the fixed housing and the electromagnetic shielding device for causing the electromagnetic shielding device to be held in the fixed housing.
Claims18
A torque transducer comprising:
- ferromagneto-stricting means provided for a rotational shaft and acting to change the magnetic permeability thereof in accordance with torque applied to said rotational shaft;
- magnetic field supply means for supplying a magnetic field to said ferromagneto-stricting means;
- sensing means for sensing a change in the magnetic permeability caused by the torque applied to said rotational shaft;
- converting means for converting the detected change in the magnetic permeability into an electrical signal;
- a fixed housing for rotatably supporting said rotational shaft with bearing means therebetween;
- electromagnetic shielding means for surrounding and holding in place said magnetic field supply means and said sensing means in such a manner as to electrically shield them;
- and
- a spacer interposed between said fixed housing and said electromagnetic shielding means for causing said electromagnetic shielding means to be held in said fixed housing.
Dependencies are inferred from the claim text.