Geared Motor Adapter Shaft Layout for Compact Stable Torque Transfer

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Solution Overview

Problem

Existing gear motor adapters are not compact enough and lack stability, particularly in transmitting high torque without play or torque fluctuations.

Innovation Solution

The adapter features a compact design with an adapter shaft, a clutch part, and a warehouse, specifically rolling bearings, with excellent claws that provide stability and a damping part to absorb torque fluctuations. The warehouse seat is designed with an interrupted area for stability and a continuous area for efficient torque transmission.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Stability of the object's composition

If the bearing seat is made continuous in the circumferential direction, then the bearing stability is improved, but the adapter cannot achieve compact dimensions

Engineering Contradiction:

Improvebearing stabilityVSAvoidadapter dimensions

Core Design Contradiction:

Stability of the object's compositionVSVolume of moving object

Solution Approach 1:

The bearing seat is segmented into multiple bearing seat segments arranged circumferentially with gaps between them. This segmentation allows the adapter to achieve compact dimensions by eliminating material in the gap regions, while the multiple segments collectively provide sufficient bearing support stability for the inner ring.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different regions of the adapter are given different structural characteristics: the bearing seat regions are designed with sufficient radial thickness and proper positioning to ensure bearing stability, while the regions between bearing seat segments are removed to reduce overall adapter volume. This local differentiation optimizes both stability and compactness.

Inventive Principle:

Principle #3Local quality

2Volume of moving object

If the adapter is made compact, then the gear motor size is reduced, but the torque transmission capability and stability deteriorate

Engineering Contradiction:

Improveadapter dimensionsVSAvoidtorque transmission stability

Core Design Contradiction:

Volume of moving objectVSReliability

Solution Approach 1:

The coupling part features multiple claws that are radially arranged and extend in the axial direction. These segmented claws provide multiple discrete torque transmission paths, ensuring reliable torque transmission from the adapter shaft to the coupling part even in a compact adapter design.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The claws are pre-shaped with specific geometric features including radial thickness variations and axial extensions that are optimized beforehand to ensure proper engagement and torque transmission. The bearing seat segments are also pre-positioned to provide preliminary support that prevents unwanted movements during torque transmission.

Inventive Principle:

Principle #10Preliminary action

3Power

If the claws are made rigid to transmit high torque, then the torque transmission capability is improved, but the adapter cannot accommodate torque fluctuations and elastic deflection

Engineering Contradiction:

Improvetorque transmission capabilityVSAvoidtorque fluctuation accommodation

Core Design Contradiction:

PowerVSAdaptability or versatility

Solution Approach 1:

The claws are designed with varying radial thickness along their length, with the radial thickness changing in the radial direction. This parameter variation allows the claws to be rigid enough for torque transmission while having sufficient elasticity to accommodate torque fluctuations and elastic deflection during operation.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The adapter is designed as an integrated component where the bearing seat segments and claws form a composite structure. The bearing seat segments provide stable support regions, while the connecting claw regions provide elastic compliance, creating a composite structure that combines rigidity for torque transmission with flexibility for accommodating fluctuations.

Inventive Principle:

Principle #40Composite materials

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The adapter achieves a highly compact and stable gear motor setup capable of transmitting high torque without play or torque fluctuations, ensuring efficient and reliable operation.

Implementation Method 1

a damping part is arranged between the claws of the coupling part and the claws of the adapter shaft, wherein the damping part comprises a base body and radially projecting areas formed thereon

Methodology Applied

Scientific EffectVibration damping: Damping

Data Source

PatentEP4359681B1Adapter, more particularly for a geared motor, comprising an adapter shaft, a clutch part and a bearing, more particularly a rolling bearing

Publication Date: 2025.04.30 SEW EURODRIVE GMBH & CO KG

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AI summary

The invention relates to an adapter, more particularly for a geared motor, comprising an adapter shaft, a clutch part and a bearing, more particularly a rolling bearing, wherein: the adapter part has dogs, more particularly dogs protruding in the axial direction; the inner ring of the bearing is fitted onto a bearing seat, more particularly a finely machined bearing seat, provided on the adapter shaft; the bearing seat covers, in the axial direction, a first region, in which the bearing seat is uninterrupted in the circumferential direction, and a second region, in which the bearing seat is interrupted in the circumferential direction, more particularly at multiple points.