Elastomeric Damper for Impact Tool Vibration Isolation
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Solution Overview
Problem
Impact tools face challenges in effectively attenuating vibrations transmitted from the housing to the battery pack during operation, leading to discomfort and potential damage.
Innovation Solution
The integration of an elastomeric damper within the battery receptacle, coupled with an isolation member, attenuates both axial and radial vibrations by allowing relative motion between the damper post and the damper pocket, reducing vibration transmission to the battery pack.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the battery pack is rigidly mounted to the housing, then the structural stability is improved, but the vibration transmission to the battery pack increases
Solution Approach 1:
The patent introduces an isolation member as an intermediary component between the housing and battery pack. This isolation member includes a damper post and elastomeric damper that selectively couples the battery pack to the housing, allowing relative motion to attenuate vibration transmission while maintaining structural stability. The isolation member acts as a mediator that decouples the rigid connection, enabling the battery pack to be protected from vibrations.
Solution Approach 2:
The patent changes the mechanical parameters of the connection system by using elastomeric materials with specific damping properties. The elastomeric damper is configured to provide controlled flexibility and damping characteristics, transforming the rigid connection into a compliant connection that can absorb and dissipate vibrational energy while maintaining structural integrity.
2Object-affected harmful factors
If the isolation member allows relative motion between damper post and damper pocket, then the vibration attenuation is improved, but the structural rigidity decreases
Solution Approach 1:
The patent applies local quality by providing different degrees of freedom for relative motion in different directions. The isolation member is designed to allow relative motion in axial and radial directions to attenuate vibrations, while maintaining structural rigidity through the constrained geometry of the damper pocket and the elastic properties of the elastomeric damper. The local flexibility is strategically positioned to address vibration paths without compromising overall structural integrity.
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 solution significantly reduces vibration transmission to the battery pack, enhancing user comfort and extending the lifespan of both the impact tool and the battery pack by minimizing wear and tear.
Implementation Method 1
an elastomeric damper coupled to the damper post and received within the damper pocket
Implementation Method 2
the elastomeric damper attenuates relative motion between the damper post of the isolation member and the damper pocket of the battery receptacle
Data Source
AI summary
An impact tool including an electric motor, a housing containing the electric motor, a battery receptacle including a cylindrical damper pocket, and an isolation member disposed within the battery receptacle and configured to selectively receive a battery pack to electrically connect the battery pack to the electric motor. The isolation member including a damper post. An elastomeric damper is coupled to the damper post and received within the damper pocket. The elastomeric damper has a cylindrical shape coinciding with the cylindrical damper pocket, wherein during operation of the impact tool, the elastomeric damper attenuates relative motion between the damper post of the isolation member and the damper pocket of the battery receptacle in both axial and radial directions of the damper post which, in turn, attenuates vibration from being transmitted from the housing to the battery pack.