TORQUE DETECTION APPARATUS

摘要

A torque detection apparatus includes a magnetic element that outputs a signal corresponding to a magnetic flux from a magnetic circuit including a magnetic yoke. The torque detection apparatus further includes a signal retrieval member electrically connected to the magnetic element, and a unit housing formed of resin and molded integrally with the magnetic element and the signal retrieval member so as to cover the magnetic element and the signal retrieval member. The unit housing includes a body portion provided with an internal space in which the magnetic yoke is housed, and a connector portion provided with an internal space in which an end of the signal retrieval member exposed from the resin is disposed. In the unit housing, a communication path is formed through which the internal space is in communication with the internal space.

主权项

1. A torque detection apparatus comprising:
a permanent magnet in which magnet poles are arranged in a circumferential direction; a magnetic yoke formed of a magnetic substance and disposed in a magnetic field formed by the permanent magnet so as to surround the permanent magnet, the magnetic yoke rotating relative to the permanent magnet to change a relative phase between the permanent magnet and the magnetic yoke; a magnetic element disposed around the magnetic yoke to output a signal corresponding to a magnetic flux from a magnetic circuit including the permanent magnet and the magnetic yoke; a signal retrieval member electrically connected to the magnetic element; and a unit housing that is formed of resin, houses the permanent magnet and the magnetic yoke, and that is molded integrally with the magnetic element and the signal retrieval member so as to cover the magnetic element and the signal retrieval member; wherein the unit housing includes a body portion provided with an internal space in which the permanent magnet and the magnetic yoke are housed; and a connector portion provided with an internal space in which an end of the signal retrieval member exposed from the resin is disposed, and in the unit housing, a communication path is formed through which the internal space in the body portion is in communication with the internal space in the connector portion.