---
publication_id: "OT-2026-000001981"
title: "Rotational speed detection structure of actuator and actuator"
published_at: "2026-09-15T19:09:57.185428Z"
canonical_url: "https://opentechnical.org/p/OT-2026-000001981"
categories:
  - "robotics-automation/robot-architectures"
keywords:
  - "b25j13/088"
  - "g01p3/487"
  - "g01p3/487"
  - "b25j13/08"
  - "b25j13/088"
  - "b25j13/088"
---

# Rotational speed detection structure of actuator and actuator

## Abstract

The provided is a rotational speed detection structure of an actuator and an actuator. The rotational speed detection structure of an actuator includes an outer housing, a motor, and a reducer mechanism, where the motor includes a stator and a rotor; a shaft sleeve is connected to the rotor; the reducer mechanism includes an input end connected to the rotor, and an output end connected to an encoder shaft; a first mounting surface is disposed on the encoder shaft; a second mounting surface is disposed on the shaft sleeve; a first magnetic ring is fixed on the first mounting surface; a second magnetic ring is fixed on the second mounting surface; a printed circuit board (PCB) is fixed on the outer housing; the PCB includes a third mounting surface; a first Hall element and a second Hall element are provided on the third mounting surface.