Position sensor for detecting angular position
AssigneeHonda Giken Kogyo Kabushiki Kaisha
InventorsToshio Yokoyama, Iwao Shimane, Tsuneo Konno
Life of this patent
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Abstract
A light, compact angle-of-rotation sensor is comprised of a magnetic ring within which resin is used to fix the ring to the periphery of a shaft. Formed on the magnetic ring are insets into which the resin enters, providing a strong bond between the resin and the magnetic ring. In addition, a key inset into the shaft provides a strong bond between the resin and the shaft. Magnetized zones are formed on the outer surface of the magnetic ring, and magneto electric transducer means are arranged in the proximity of these zones to face said zones, and the angle of rotation is detected from the changes in magnetism that accompany the rotation.
Claims16
An angle-of-rotation sensor provided with a magnetic rotating member which rotates synchronously with the rotation of a subject shaft to be measured, and magneto electric transducer means arranged in opposition to said magnetic rotating member, the improvement comprising:
- said magnetic rotating member is comprised of a shaft fixed coaxially within a tubular magnetic ring by resin, and rotational movement prevention means is provided for preventing slip occurring between the magnetic ring and the shaft,
- wherein at least one end of the magnetic ring is provided with inset portions into which the resin extends to form said rotational movement prevention means,
- wherein the edge face of at least one end of the magnetic ring slopes inwards toward the center of the ring, and projecting portions are provided at suitable locations on the edge face.
An angle-of-rotation sensor provided with a magnetic rotating member which rotates synchronously with the rotation of a subject shaft to be measured, magneto electric transducer means arranged in opposition to said magnetic rotating member, the improvement comprising:
- said magnetic rotating member is comprised of a shaft fixed coaxially within a tubular magnetic ring by resin, and rotational movement prevention means is provided for preventing slip occurring between the magnetic ring and the shaft,
- wherein at least one end of the magnetic ring is provided with inset portions into which the resin extends to form said rotational movement prevention means,
- wherein the inset portion comprises a crosscut on the edge of the magnetic ring that extends to form an opening on the outer surface of the magnetic ring.
An angle-of-rotation sensor provided with a magnetic rotating member which rotates synchronously with the rotation of a subject shaft to be measured, magneto electric transducer means arranged in opposition to said magnetic rotating member, the improvement comprising:
- said magnetic rotating member is comprised of a shaft fixed coaxially within a tubular magnetic ring by resin, and rotational movement prevention means is provided for preventing slip occurring between the magnetic ring and the shaft,
- wherein the inner surface of the tubular magnetic ring is in an unground state.
A position sensor for measuring the angular position of a rotating shaft, comprising:
- a magnetic member which rotates synchronously with the rotation of the subject shaft to be measured, said magnetic rotating member having a shaft fixed coaxially within a tubular magnetic ring by resin, said magnetic ring being at, least, one end thereof with inset portions into which the resin extends to form rotational movement prevention means for preventing slip occurring between the magnetic ring and the shaft in such a manner that the edge face of said magnetic ring slopes inward toward the center to said ring and projecting portions are provided at suitable locations on the said edge face;
- and
- magneto electric transducer means arranged in opposition to said magnetic rotating member.
A position sensor for measuring the angular position of a rotating shaft, comprising:
- a magnetic rotating member which rotates synchronously with the rotation of the subject shaft to be measured, said magnetic rotating member having a shaft fixed coaxially within a tubular magnetic ring by resin, said magnetic ring being provided at, at least, one end with inset- portions into which the resin extends to form rotational prevention means for preventing slip occurring between said magnetic ring and the shaft, said inset portions comprising a crosscut on the edge of said magnetic ring that extends to form an opening on the outer surface of said magnetic ring;
- and
- magneto electric transducer means arranged in opposition to said magnetic rotating member.
A position sensor for measuring the angular position of a rotating shaft, comprising:
- a tubular member comprised of a magnetic material and having a center shaft disposed coaxially thereto, said tubular member being rotatable synchronously with the rotation of the shaft to be measured through said center shaft, said tubular member having an inset portion at an end thereof and being left unground at its inner surface, said shaft having a portion projected axially therefrom;
- plastic means bonding said tubular member to said shaft, said plastic means contacting the unground inner surface of the tubular member and extending to the inset portion while encircling the center shaft at the projected portion;
- and
- magneto electric transducer means positioned on a member independent of the rotation of the tubular member for generating a signal indicative of the angular position of the shaft to be measured.
Dependencies are inferred from the claim text.