Power Tool Handle Dynamic Vibration Absorber
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Solution Overview
Problem
Existing power tool handles with elastic members for vibration isolation often compromise maneuverability due to the spring constant's impact on handling dynamics.
Innovation Solution
The introduction of a dynamic vibration absorber comprising a beam and a weight, which forms a cantilever-type dynamic vibration reducer, allows for adjustable resonant frequency matching the excitation frequency from the power tool, thereby reducing handle vibrations without affecting maneuverability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the spring constant of the elastic member is set to a small value to enhance vibration-isolating effect, then vibration isolation is improved, but maneuverability of the handle is deteriorated
Solution Approach 1:
The invention employs a dynamic vibration absorber consisting of a spring member and a weight member that utilizes mechanical vibration principles. The spring member has a specific resonant frequency that matches the excitation frequency from the power tool, causing the weight member to vibrate in opposition to the handle vibrations, thereby canceling them out. This approach achieves vibration isolation without requiring a small spring constant that would harm maneuverability.
Solution Approach 2:
The invention changes the parameters of the vibration isolation system by introducing a weight member with specific mass and positioning it at a specific distance from the mounting part. By adjusting the mass of the weight member and its position, the resonant frequency of the spring-weight system can be tuned to match the excitation frequency, achieving effective vibration isolation while maintaining handle maneuverability.
2Object-affected harmful factors
If the resonant frequency of the dynamic vibration absorber is tuned to match excitation frequency to reduce handle vibrations, then vibration reduction is improved, but device complexity increases
Solution Approach 1:
The spring member serves dual functions: it acts as both the vibration isolating element and the spring component of the dynamic vibration absorber. The weight member is integrated into the handle structure or mounted within it, combining vibration reduction functionality with the existing handle design. This multi-functionality approach reduces device complexity by avoiding separate vibration isolation mechanisms.
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 configuration effectively reduces handle vibrations while maintaining maneuverability, as the resonant frequency can be adjusted to match the excitation frequency, ensuring optimal performance across various power tools.
Implementation Method 1
the beam and the weight supported by the beam form a dynamic vibration absorber (dynamic vibration reducer) and thus vibration of the handle body can be reduced
Implementation Method 2
setting/tuning the resonant frequency of the dynamic vibration absorber to be matched to excitation frequency
Implementation Method 3
An elastic member (for example, spring or rubber) is interposed between the grip part and a portion of the handle body
Data Source
AI summary
A handle for use with a power tool includes a handle body, a beam and a weight. The handle body includes a mounting part and a grip part. The handle body is configured to be removably secured to a tool body of a power tool. The grip part is formed in an elongated hollow shape. The beam is supported by the handle body in a cantilever manner and extends within the grip part. The weight is supported by the beam.