Ceiling Fan Elastic Buffer Vibration Absorption

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Solution Overview

Problem

Conventional ceiling fans experience vibration and bias swinging due to the outer tube's movement and vibration transmission from the outer rotor motor, compromising safety and aesthetics.

Innovation Solution

The ceiling fan design incorporates a rotating disc with elastic buffer pieces around an insert hole, connected to a fixed shaft, which absorbs vibrations and corrects eccentric alignment through elastic deformation, allowing stable rotation of the outer tube.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Stability of the object's composition

If the inner tube is locked and secured with the stator of the outer rotor motor, then the motor structure is stable, but the outer tube容易产生 vibration and bias swinging due to eccentric combination

Engineering Contradiction:

Improvemotor structure stabilityVSAvoidouter tube vibration and swinging

Core Design Contradiction:

Stability of the object's compositionVSObject-affected harmful factors

Solution Approach 1:

The patent introduces an intermediary component (the rotating disc with elastic buffer pieces) between the inner tube and the outer tube. This intermediary absorbs the eccentricity effects and vibration, preventing direct transmission to the outer tube while maintaining the stable motor structure.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent changes the physical state of the connection by introducing elastic buffer pieces that can deform elastically. This parameter change allows the system to accommodate eccentricity and absorb vibration through elastic deformation, transforming rigid constraints into flexible compensation.

Inventive Principle:

Principle #35Parameter changes

2Object-affected harmful factors

If fixing cables are added between the base and the fan blade holder to stabilize the outer tube, then the swinging extent is reduced, but the external beauty of the ceiling fan is spoiled

Engineering Contradiction:

Improveouter tube swinging extentVSAvoidexternal beauty

Core Design Contradiction:

Object-affected harmful factorsVSShape

Solution Approach 1:

The patent extracts the stabilization function from the external fixing cables and integrates it into the internal rotating disc structure. The elastic buffer pieces on the rotating disc perform the stabilization function internally, eliminating the need for visible external cables and preserving the aesthetic appearance.

Inventive Principle:

Principle #2Taking out (Extraction)

3Device complexity

If the outer tube is directly connected to the rotor, then the structure is simple, but the vibration from motor operation is directly transmitted to the outer tube

Engineering Contradiction:

Improvestructure simplicityVSAvoidvibration transmission

Core Design Contradiction:

Device complexityVSObject-generated harmful factors

Solution Approach 1:

The rotating disc with elastic buffer pieces serves as an intermediary between the rotor and the outer tube. This intermediary component breaks the direct vibration transmission path while maintaining structural simplicity through a compact integrated design.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent converts the harmful vibration into beneficial elastic deformation of the buffer pieces. The vibration energy is absorbed and dissipated through elastic deformation, transforming the harmful vibration transmission into a beneficial vibration absorption mechanism.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

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

This design eliminates vibration and bias swinging, enhancing safety and maintaining the fan's external beauty by eliminating the need for stabilizing cables.

Implementation Method 1

the elastic buffer pieces can also correct the state of eccentric combination via elastic deformation to enable the outer tube to be rotated stably

Methodology Applied

Scientific EffectElastic deformation: Elasticity

Implementation Method 2

the elastic buffer pieces can also correct the state of eccentric combination via elastic deformation

Methodology Applied

Scientific EffectElastic deformation: Elasticity

Data Source

PatentUS8840379B2Ceiling fan

Publication Date: 2014.09.23 AIR COOL INDAL

AI summary

A ceiling fan includes an outer rotor motor having a rotor connected to a rotating disc and a stator connected with an inner tube. An outer tube is fitted around the inner tube, having one end connected with the rotating disc, and a plurality of elastic buffer pieces are positioned between the outer tube and the rotating disc. By so designing, when the rotor is rotated to actuate the rotating disc together with the outer tube to rotate, the elastic buffer pieces can absorb the vibration produced by operation of the outer rotor motor and also correct bias swinging of the outer tube through their elastic deformation to enable the outer tube to be rotated stably.