Power Tool Handle Assembly Vibration Damping Mechanism
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Solution Overview
Problem
Existing handle assemblies for power tools, such as hammer drills, fail to effectively dampen vibrations transmitted from the housing to the grip, requiring additional components like separate tensioning parts, increasing cost and complexity.
Innovation Solution
A handle assembly with a mounting part and fastening mechanism that includes at least one vibration damping member between the handle and the fastening mechanism, where rotation of the handle relative to the mounting part causes the fastening mechanism to tighten or loosen, reducing the number of components and enhancing vibration damping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate tensioning part is used to tighten or loosen the strap retainer, then the mounting part can be securely fastened to the housing, but the cost and complexity of manufacture increase
Solution Approach 1:
The patent combines the tensioning function and fastening function into a single integrated strap retainer mechanism. The strap retainer incorporates both the mounting function and the tensioning function, eliminating the need for separate tensioning parts while maintaining secure fastening capability through the integrated design
2Ease of manufacture
If traditional mounting arrangements are used, then the handle assembly can be constructed, but significant vibrations are transmitted from the housing to the grip portion
Solution Approach 1:
The patent introduces a vibration damping element as an intermediary component between the strap retainer and the grip portion. This damping element acts as a mediator that transmits the necessary mechanical forces while filtering out harmful vibrations, thus reducing vibration transmission to the user's hand without compromising the structural integrity of the assembly
3Reliability
If multiple separate components are used for the fastening mechanism, then the mounting part can be securely fastened, but the handle assembly becomes less compact and more costly
Solution Approach 1:
The patent merges multiple fastening functions into the single integrated strap retainer component. The strap retainer simultaneously performs mounting, tensioning, and vibration damping functions, which reduces the overall volume of the handle assembly by eliminating the space required for separate components while maintaining secure fastening reliability
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 dampens vibrations transmitted to the handle, simplifies construction, and reduces the number of components, leading to a more compact and cost-effective handle assembly.
Implementation Method 1
at least one first vibration damping member adapted to be located between the handle and the fastening mechanism to damp vibrations transmitted from the fastening mechanism to the handle
Data Source
AI summary
A handle assembly for a power tool is disclosed. The handle assembly has a handle (84), a metal strip (82) for releasably mounting the handle assembly to the housing of a power tool, and a fastening mechanism (80, 100, 104) for tightening and loosening the metal strip on the housing of the power tool. Vibration dampers (124, 126) are located between the handle and the fastening mechanism to damp vibrations transmitted from the fastening mechanism to the handle. Limited rotation of the handle relative to the metal strip is possibly, but rotation beyond predetermined limits causes the fastening mechanism to tighten and/or loosen the metal strip on the housing.