Power Tool Housing Damping via Integrated Elastic Layer
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Solution Overview
Problem
Hand-held power tools face challenges in anti-vibration requirements due to the assembly of multiple housing elements, which demands a robust damping structure to enhance stability and reduce vibration.
Innovation Solution
The power tool design incorporates a housing assembly with a connecting hole, a protective layer, and an elastic portion integrally formed with the protective layer, made of Thermoplastic Elastomer, to connect the housings and provide damping, featuring a collar, elastic portions, and a hard rubber ring for improved vibration absorption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple housing elements are assembled together, then the power tool can be manufactured with different component types, but the vibration between housing components increases
Solution Approach 1:
An elastic portion is introduced as an intermediary element between the first housing and second housing. This elastic portion absorbs and dampens vibration generated during operation, reducing the harmful vibrations transmitted between housing components while allowing the multi-component housing structure to remain assembled for manufacturing flexibility.
Solution Approach 2:
The protective layer is formed by combining a hard outer layer and an elastic inner layer into a composite structure. The hard layer provides protection against external impacts, while the elastic layer absorbs vibrations. This composite material approach allows the housing to simultaneously achieve protection and vibration damping without requiring separate components for each function.
2Object-affected harmful factors
If a damping structure is added to reduce vibration, then the anti-vibration performance improves, but the device complexity increases
Solution Approach 1:
The elastic portion is integrally formed with the protective layer, merging the damping function with the protective housing structure. This integration eliminates the need for separate damping components and simplifies assembly, as the damping function is built into the housing itself rather than added as a separate complex subsystem.
Solution Approach 2:
The protective layer serves multiple functions simultaneously: it provides mechanical protection against external impacts through its hard outer layer, absorbs vibrations through its elastic inner layer, and maintains structural integrity of the housing assembly. This multi-functionality reduces the need for additional specialized damping components.
3Object-affected harmful factors
If separate damping components are used, then the vibration absorption improves, but the assembly efficiency decreases
Solution Approach 1:
The elastic portion and protective layer are formed as an integrated component through injection molding, combining what would otherwise be separate damping and protective elements into a single manufacturable part. This integration significantly simplifies assembly operations while maintaining effective vibration absorption capabilities.
Solution Approach 2:
The Shore A Hardness number of the protective layer and elastic portion is optimized to be between 50 and 75, creating a material with balanced properties that provides both protection and damping. This parameter optimization allows a single material composition to fulfill multiple functions, eliminating the need for separate damping components with different material specifications.
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 effectively reduces vibration between housing components, enhances the tool's service life, simplifies production, and improves assembly efficiency by providing a robust damping effect.
Implementation Method 1
an elastic portion connected with the protective layer, wherein the elastic portion is arranged between the first housing and the second housing
Implementation Method 2
the elastic portion is arranged between the first housing and the second housing and is integrally formed with the protective layer
Implementation Method 3
the elastic portion and the protective layer are made of Thermoplastic Elastomer
Data Source
AI summary
A power tool has a housing, which includes a first housing and a second housing. The second housing is configured with a connecting hole, a first connecting part passing through the connecting hole connecting the first housing and the second housing, a protective layer, arranged on a surface of the second housing, an elastic portion, connected with the protective layer, arranged between the first housing and the second housing, and is integrally formed with the protection layer.