Rotating Motor and PCB Assembly for Robot Joint

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Solution Overview

Problem

Robots experience tangling or twisting of connection members when electrically connecting motors with printed circuit boards (PCBs), leading to mechanical issues and inefficiencies.

Innovation Solution

A robot design where the spin motor, drive motor, and PCB are mounted on a spin body, rotating together to prevent relative movement and minimize tangling or twisting of connection members, with a compact spin cover design and strategic placement of components to optimize space and connectivity.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If motors and PCBs are separately mounted with flexible connection members, then ease of assembly is improved, but tangling and twisting of connection members occurs during rotation

Engineering Contradiction:

Improveease of assemblyVSAvoidconnection stability

Core Design Contradiction:

Ease of manufactureVSReliability

Solution Approach 1:

The patent merges the motors and PCBs into a single integrated assembly mounted on the spin body. This combination ensures that both components rotate together as one unit, eliminating relative movement between them and preventing tangling or twisting of the connection members that would occur if they were separately mounted.

Inventive Principle:

Principle #5Merging (Combining)

2Adaptability or versatility

If connection members are made flexible to allow movement, then adaptability is improved, but tangling and twisting occurs during rotation

Engineering Contradiction:

Improvemovement flexibilityVSAvoidconnection integrity

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

Instead of making the connection members flexible to accommodate movement, the patent inverts the approach by making the entire motor-PCB assembly move together as a rigid unit. This eliminates the need for flexible connection members that would tangle, while maintaining the necessary adaptability through the rotational capability of the integrated assembly itself.

Inventive Principle:

Principle #13The other way round (Inversion)

3Device complexity

If motors and PCBs are mounted separately on different bodies, then device complexity is reduced, but relative movement causes connection issues

Engineering Contradiction:

Improvemounting structureVSAvoidelectrical connection stability

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The patent combines the motors and PCBs into a single integrated mounting structure on the spin body. This merging approach increases structural complexity slightly but eliminates the relative movement problems that would occur with separate mounting, thereby significantly improving electrical connection stability.

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentEP3587051B1robot

Publication Date: 2023.08.09 LG ELECTRONICS INC

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AI summary

In a robot according to an embodiment of the present invention, a spin motor, a drive motor, a spin motor, and a PCB connected electrically to the spin motor and the drive motor can all be mounted on the spin body. Accordingly, the spin motor, the driving motor, and the PCB are rotated together with the spin body, so that relative movement does not occur between the PCB and the respective motors, and tangling or twisting of the connection member electrically connecting the respective motors and the PCB may not occur.