Rotary position sensor

Patent metadata

Field	Value
Publication number	US-2025060229-A1
Application number	US-202418939871-A
Country	US
Kind code	A1
Filing date	Nov 7, 2024
Priority date	Jun 1, 2022
Publication date	Feb 20, 2025
Grant date	—

Abstract

A rotary position sensor configured to transmit the rotational motion from the outside to a rotating body with high accuracy, allowing inspection without affecting the shaft hole includes a rotating body including a cylindrical shaft body having a shaft hole and a flange continuously connected to the shaft body and extending outward in a radial direction of the shaft body, a housing including a bearing through which the shaft body of the rotating body is inserted, and a measuring unit configured to measure a relative position of the rotating body to the housing, wherein the flange includes an engaging portion on a periphery thereof.

First claim

What is claimed is:

1 . A rotary position sensor comprising:
a rotating body including:
a cylindrical shaft body having a shaft hole; and
a flange continuously connected to the shaft body and extending outward in a radial direction of the shaft body;
a housing including a bearing through which the shaft body of the rotating body is inserted; and a measuring unit configured to measure a relative position of the rotating body to the housing, wherein the flange includes an engaging portion on a periphery thereof.

2 . The rotary position sensor according to claim 1 , wherein the shaft hole has a holder for receiving and holding an operating shaft having a non-circular cross section, as viewed in a direction along an axis of rotation of the rotating body.

3 . The rotary position sensor according to claim 1 ,
wherein the engaging portion includes a first engaging portion and a second engaging portion arranged with an axis of rotation of the rotating body sandwiched therebetween,
wherein the first engaging portion and the second engaging portion are line-symmetry about a first imaginary line extending along the radial direction of the rotating body, as viewed in a direction along the axis of rotation of the rotating body.

4 . The rotary position sensor according to claim 1 , wherein the engaging portion includes an extending portion extending outward in the radial direction of the rotating body, as viewed in a direction extending along an axis of rotation of the rotating body.

5 . The rotary position sensor according to claim 4 , wherein the extending portion includes a protruding portion protruding in a direction perpendicular to a direction in which the extending portion extends, as viewed in the direction along the axis of rotation of the rotating body.

6 . The rotary position sensor according to claim 5 , wherein the protruding portion is formed as a curve, as viewed in the direction along the axis of rotation of the rotating body.

7 . The rotary position sensor according to claim 4 , the flange includes a partially recessed portion continuously connected to the extending portion, as viewed in the direction along the axis of rotation of the rotating body.

8 . The rotary position sensor according to claim 1 , wherein the engaging portion has a line-symmetric shape, with a second imaginary line extending along a radial direction of the rotating body and passing through the engaging portion as an axis of symmetry, as viewed in a direction along an axis of rotation of the rotating body.

9 . The rotary position sensor according to claim 1 , wherein the housing includes a protrusion having an overlapping portion overlapping with the engaging portion of the rotating body positioned at a reference position, as viewed in a direction along an axis of rotation of the rotating body.

10 . The rotary position sensor according to claim 9 , wherein the protrusion includes a portion positioned outside the engaging portion, as viewed in the direction along the axis of rotation of the rotating body.

11 . The rotary position sensor according to claim 1 , wherein the measuring unit includes a fixed measuring unit mounted on the housing and a movable measuring unit mounted on the rotating body.

12 . The rotary position sensor according to claim 11 ,
wherein the fixed measuring unit includes a resistor, and wherein the movable measuring unit includes a sliding element that comes into sliding-contact with the resistor.

13 . The rotary position sensor according to claim 11 ,
wherein the movable measuring unit includes a resistor, and wherein the fixed measuring unit includes a sliding element that comes into sliding-contact with the resistor.

14 . The rotary position sensor according to claim 1 , further comprising a crush rib provided on an inner wall of the shaft hole.

15 . The rotary position sensor according to claim 1 , wherein the engaging portion engages with an operating jig of a functional inspection apparatus for the measuring unit.

Assignees

• Alps Alpine Co Ltd

Inventors

• Kato Hidekazu
• Kato Jyunichi

Classifications

• G01D5/165 Primary

  by relative movement of a point of contact {or actuation} and a resistive track · CPC title

• G01B7/30 Primary

  for measuring angles or tapers; for testing the alignment of axes · CPC title

• H01C10/32

  the contact moving in an arcuate path · CPC title

• H01C1/024

  the housing or enclosure being hermetically sealed (H01C1/028, H01C1/032, H01C1/034 take precedence) · CPC title

• G01B7/003

  for measuring position, not involving coordinate determination (coordinate measuring G01B7/004) · CPC title