Rotation angle and torque detection apparatus
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsKouji Oike, Kiyotaka Uehira, Kiyotaka Sasanouchi, Kouichi Santo
Life of this patent
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Abstract
A rotation angle and torque detection apparatus includes: a target having magnetic poles magnetized at an outer circumference face so that the magnetic poles have alternately-different polarities and the target can be rotated multiple times; and a detector that is positioned to have a fixed distance from the target in a radial direction of the target and to have a fixed distance from the center of lo the target in an axial direction and that is provided at a plane vertical to the radial direction of the target. This rotation angle and torque detection apparatus can sense a torque and a multiple rotation angle with high resolution and high accuracy.
Claims15
A rotation angle and torque detection apparatus comprising:
- a target having magnetic poles magnetized at an outer circumference face so that the magnetic poles have alternately-different polarities and the target can be rotated multiple times;
- and
- a detector that is positioned to have a fixed distance from the target in a radial direction of the target and to have a fixed distance from a center of the target in an axial direction and that is provided at a plane vertical to the radial direction of the target.
A rotation angle and torque detection apparatus comprising:
- a first target having magnetic poles magnetized at an outer circumference face so that the magnetic poles have alternately-different polarities and the first target can be rotated multiple times;
- a first rotation body that is engaged with and connected to at least one of an input axis and an output axis, that retains the first target, and that can be rotated multiple times;
- a first detector that is provided to have a fixed distance to the first target in a radial direction of the first target and to have a fixed distance from a center of the first target in an axial direction of the first target and that is provided at a plane vertical to a radial direction of the first target;
- a second target having magnetic poles magnetized at an outer circumference face so that the magnetic poles have alternately-different polarities and the second target can be rotated multiple times;
- a second rotation body that is engaged with and connected to the first detector and at least one of the output axis and the input axis, that retains the second target, and that can be rotated multiple times;
- a second detector that is provided to have a fixed distance in a radial direction of the second target and to have a fixed distance from the center of the second target in an axial direction of the second target and that is provided at a plane vertical to a radial direction of the second target;
- a third rotation body that is engaged with and connected to at least one of the input axis and the output axis and that has a gear;
- a third target that is magnetized and that can be rotated multiple times;
- a fourth rotation body that is provided at the gear of the third rotation body, that has the third target at its center, and that has a gear;
- a third detector for detecting a rotation angle of the fourth rotation body;
- a fourth target that is magnetized and that can be rotated multiple times;
- a fifth rotation body that is connected to a gear of the fourth rotation body, that has the fourth target at the center, and that has a gear;
- and
- a fourth detector for detecting a rotation angle of the fifth rotation body.
Dependencies are inferred from the claim text.