Motor Mount Snap-Fit Damping for Compact Ventilation Units

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Solution Overview

Problem

Existing ventilation apparatuses used with boiler burners are bulky due to the length of threaded attachment members, which increases the distance between the electric motor and the spiral shaped box, thereby compromising vibration damping and noise reduction while also risking gas leaks.

Innovation Solution

The ventilation apparatus incorporates snap-in or elastic interlocking attachment elements between the damping members and the support plate, reducing the overall size by minimizing the distance between the electric motor and the impeller, while ensuring effective vibration damping and noise reduction without the need for screwable attachment elements.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If threaded attachment members are used to connect damping members to the motor and spiral shaped box, then the damping members are securely attached, but the overall size increases and the distance between the motor and spiral shaped box increases

Engineering Contradiction:

Improveattachment securityVSAvoidoverall size

Core Design Contradiction:

ReliabilityVSVolume of moving object

Solution Approach 1:

The invention extracts the threading function from the attachment members and replaces it with a snap-fit mechanism. The attachment members have a cylindrical shape with an external snap-fit portion that engages with a corresponding internal snap-fit portion, eliminating the need for threaded connections while maintaining secure attachment.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

Instead of using threaded members that extend outward to provide attachment security, the invention inverts the approach by using snap-fit portions that engage internally. The external snap-fit portion on the attachment member engages with the internal snap-fit portion in the damping member, creating a secure connection without the bulk of threaded structures.

Inventive Principle:

Principle #13The other way round (Inversion)

2Reliability

If the distance between the motor and spiral shaped box is increased to accommodate attachment members, then the damping members can be attached, but the vibration damping effectiveness is reduced

Engineering Contradiction:

Improveattachment capabilityVSAvoidvibration transmission

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The invention removes the unnecessary distance created by threaded attachment members by using a snap-fit mechanism that allows the damping member to be positioned directly against the motor housing, minimizing the distance and maximizing vibration damping effectiveness.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The snap-fit mechanism inverts the traditional attachment approach by allowing the damping member to maintain direct contact with the motor housing through the engagement of external and internal snap-fit portions, thereby eliminating the air gap that would otherwise reduce damping effectiveness.

Inventive Principle:

Principle #13The other way round (Inversion)

3Reliability

If threaded attachment members are used, then the damping members can be secured, but the number of components and assembly complexity increases

Engineering Contradiction:

Improveconnection strengthVSAvoidnumber of components

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The invention merges the attachment function into the damping member itself by integrating the snap-fit mechanism. The external snap-fit portion and internal snap-fit portion are built into the damping member structure, eliminating the need for separate threaded attachment members and reducing the total component count.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The invention extracts the attachment functionality from separate threaded members and incorporates it directly into the damping member through the snap-fit mechanism, simplifying the overall structure and reducing the number of parts that need to be assembled.

Inventive Principle:

Principle #2Taking out (Extraction)

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 achieves reduced bulk and improved vibration damping and noise reduction, while ensuring a secure seal to prevent gas leaks, thereby enhancing the safety and efficiency of the ventilation system.

Implementation Method 1

damping members interposed between the support means and the electric motor... interrupt the transmission, to a spiral or volute shaped box of a fan, of the noise and vibrations generated by the rotation of the rotor of a motor

Methodology Applied

Scientific EffectVibration damping: Damping

Data Source

PatentEP4323651B1Ventilation apparatus

Publication Date: 2025.06.18 SIT SPA

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AI summary

Ventilation apparatus (10), comprising an electric motor (11) and a plate (13) on which the electric motor (11) is mounted. Damping members (22) are coupled in a snap-in or elastic interlocking manner on one side with the plate (13) and on the other side with the electric motor (11).