---
publication_id: "OT-2026-000003175"
title: "Structure for joining impeller to rotatable shaft"
published_at: "2026-09-15T19:43:56.460388Z"
canonical_url: "https://opentechnical.org/p/OT-2026-000003175"
categories:
  - "industrial-motion-power-transmission/rotary-motion"
keywords:
  - "f16d1/06"
  - "f16d1/06"
  - "f04d29/266"
  - "f04d29/266"
  - "f16d2001/062"
  - "f16d2001/062"
---

# Structure for joining impeller to rotatable shaft

## Abstract

There is provided a structure for joining an impeller to a rotatable shaft, including (a) a bushing through which the impeller is joined to the rotatable shaft, the bushing including a hollow cylindrical portion which is to fit into a recess formed with the impeller and into which the rotatable shaft is to fit, (b) a first joint structure for joining the bushing to the impeller so that the bushing is positioned coaxially with the impeller, and (c) a second joint structure for joining the rotatable shaft to the bushing so that the rotatable shaft is positioned coaxially with the bushing. The structure provides a sufficient ability for transferring a torque between an impeller and a shaft, self-aligning performance between an impeller and a shaft, and good serviceability for assembling and disassembling, and further provides higher accuracy in axially positioning an impeller and a shaft and lower fabrication costs.

## 1. Drawings

[0001] Sheet 1.

[0002] Sheet 2.

[0003] Sheet 3.

[0004] Sheet 4.