Power Tool Handle Mounting Assembly Vibration Damping
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Solution Overview
Problem
Existing mounting assemblies for power tool handles fail to effectively dampen vibrations transmitted from the tool's housing to the handle, particularly in hammer drills, leading to discomfort and reduced user control.
Innovation Solution
A mounting assembly with a first and second mounting member and at least one vibration damping member that compresses or expands to absorb vibrations, allowing the handle to move relative to the housing, thereby improving damping efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If vibration damping members are placed between the handle and housing, then vibrations are attenuated, but the device complexity increases
Solution Approach 1:
The mounting member combines multiple functions into a single integrated component: it provides structural mounting support while incorporating vibration damping features through integrated resilient members. This merging eliminates the need for separate damping components, reducing overall assembly complexity while maintaining effective vibration attenuation.
Solution Approach 2:
The resilient member acts as an intermediary element between the rigid handle mounting portion and the housing, absorbing vibration energy through elastic deformation. This intermediary component isolates the handle from direct vibration transmission while maintaining the structural connection needed for tool operation.
2Object-affected harmful factors
If resilient members are made larger to improve damping, then vibration damping improves, but the volume of the mounting assembly increases
Solution Approach 1:
The resilient member is strategically positioned at specific locations within the mounting assembly where vibration energy is most effectively absorbed. Rather than uniformly distributing damping material throughout the assembly, the design concentrates damping capability at critical stress points, maximizing vibration attenuation while minimizing overall volume increase.
Solution Approach 2:
The mounting member utilizes composite construction combining rigid structural portions with integrated resilient damping portions. This composite approach allows the assembly to achieve both structural integrity and effective vibration damping within a compact volume, as the resilient material is embedded within or alongside the rigid structure rather than adding separate bulk.
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 significantly enhances vibration damping, particularly in directions orthogonal to the handle's axis, reducing user discomfort and improving control during tool operation.
Implementation Method 1
at least one first vibration damping member adapted to damp vibrations tending to cause the first mounting member to pivot relative to the second mounting member
Implementation Method 2
rotation of the first mounting member relative to the second mounting member about an axis substantially parallel to the sliding axis and/or to an axis substantially parallel to a longitudinal axis of the handle causes compression and/or expansion of at least one said first resilient member
Data Source
AI summary
A mounting assembly for moveably mounting a handle of a power tool to a housing of the power tool is disclosed. The mounting assembly has a metal bar (324) mounted to a housing (290) of the power tool and a vibration damper (332) mounted to a handle (294) of the power tool and slidably mounted to the metal bar. The vibration damper includes a vibration damping member (344) for damping vibrations tending to cause the vibration damper to pivot relative to the metal bar about an axis substantially parallel to the longitudinal axis of the metal bar.