Blower Motor Damping Assembly for Vacuum Cleaner Noise Isolation
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Solution Overview
Problem
Vacuum cleaners continue to produce significant noise due to vibrations from the blower motor, despite the use of noise-dampening materials and quiet motor designs, as existing solutions do not effectively decouple the motor from the housing to absorb these vibrations.
Innovation Solution
A motor arrangement featuring a contour-bound damping element that encloses the blower motor, made of materials with high damping properties, such as polyurethane, to absorb vibrations and reduce noise, combined with a motor capsule for additional insulation and a fixing device to secure the damping element and motor capsule to the housing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If noise-dampening materials are arranged on the inside and outside of the motor cover, then noise emissions are reduced to some extent, but vibrations are still transmitted directly to the housing causing significant noise
Solution Approach 1:
A damping element is introduced as an intermediary component between the blower motor and the housing. This damping element is made of vibration-absorbing material and is arranged in a contour-bound manner to ensure direct contact with the motor housing, thereby mediating the transmission of vibrations and preventing them from reaching the vacuum cleaner housing.
Solution Approach 2:
The vibration isolation system is segmented into distinct functional components: the damping element for vibration absorption, the motor capsule for structural containment, and the fixing device for secure mounting. This segmentation allows each component to perform its specific function optimally, with the damping element specifically tasked with absorbing vibrations before they reach the housing.
2Object-affected harmful factors
If the blower motor is surrounded by a large number of noise-damping materials, then noise emissions are reduced, but the device complexity increases
Solution Approach 1:
Multiple functions are merged into a single damping element: vibration damping, noise reduction, and structural support. The damping element is designed to perform all these functions simultaneously, eliminating the need for separate noise-damping materials and reducing overall device complexity while maintaining effectiveness.
Solution Approach 2:
The damping element is designed with local quality variations to optimize its performance. The element has different densities and damping properties in different regions, with higher damping capacity near the motor contact surfaces and gradual transition zones toward the housing, allowing efficient vibration absorption with minimal material.
3Object-affected harmful factors
If the damping element is arranged in a contour-bound manner between the housing and the blower motor, then vibrations are effectively damped, but the manufacturing precision requirements increase
Solution Approach 1:
The damping element is designed with adjustable geometric parameters, including controllable thickness, density, and hardness. These parameters can be modified during manufacturing to achieve the desired contour fit without requiring extremely high precision, as the material properties can be tuned to compensate for minor dimensional variations.
Solution Approach 2:
The damping element is made from composite materials that combine vibration-absorbing properties with manufacturing flexibility. These composite materials allow for easier molding and shaping, reducing the need for high-precision machining while maintaining the contour-bound configuration necessary for effective vibration damping.
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 solution effectively decouples the blower motor from the housing, significantly reducing noise emissions by ensuring that vibrations are absorbed directly by the damping element, leading to a quieter operation of vacuum cleaners and other electric motor-driven household appliances.
Implementation Method 1
a damping element, which is arranged in a contour-bound manner between the housing and the blower motor and which is designed and arranged to damp vibrations transmitted from the blower motor to the housing
Data Source
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AI summary
The motor assembly (1) has a housing (2), a motor cap (5) and a blower motor (4), which is arranged in inner side of the housing and the motor cap in mounting condition. A damping element (3) is arranged between the housing and the blower motor and is equipped for damping the vibrations transmitted from the blower motor to the housing. The blower motor has a housing cover and the damping element has an inner contour, which corresponds to an outer contour of the housing cover.