---
publication_id: "OT-2026-000003465"
title: "Structure of first arm of industrial robot having articulated horizontal arms"
published_at: "2026-09-15T20:31:09.428695Z"
canonical_url: "https://opentechnical.org/p/OT-2026-000003465"
categories:
  - "robotics-automation/robot-architectures"
keywords:
  - "b25j18/00"
  - "b25j9/042"
  - "b25j9/042"
  - "b25j17/00"
  - "b25j19/0004"
  - "b25j19/0004"
---

# Structure of first arm of industrial robot having articulated horizontal arms

## Abstract

Provided is a compact first arm (12) of an industrial robot having articulated horizontal arms, which first arm has a direct drive motor (19), an electromagnetic brake (25), and a rotary encoder (34, 36) disposed close to each other concentrically between the first arm (12) and a base post (10) supporting the first arm (12), and has another direct drive motor (39), another electromagnetic brake (45), and another rotary encoder (54, 56) disposed close to each other concentrically between the first arm (12) and a second arm (14) rotatably supported by the first arm (12).

## 1. Drawings

[0001] Sheet 1.