Battery Pack Isolation Interface for Power Tool Vibration Damping
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Solution Overview
Problem
Power tools generate vibrational forces that can reduce the life cycle of battery packs due to excessive vibration propagation.
Innovation Solution
A battery pack isolation system with an interface member and elastomeric isolators that mechanically isolate the battery pack from the housing, reducing vibration transfer during tool operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the battery pack is directly coupled to the housing, then electrical connection is simplified, but vibration forces are transmitted to the battery pack reducing its life cycle
Solution Approach 1:
The patent introduces an interface member as an intermediary component between the battery pack and housing. This interface member includes isolating elements that prevent vibration transmission while maintaining electrical connection, thus protecting the battery pack from vibrational forces without requiring direct modification of the battery pack or housing structures
Solution Approach 2:
The isolation system is segmented into distinct functional components: the interface member with isolating elements, electrical contacts, and mounting structures. This segmentation allows each component to perform its specific function (vibration isolation, electrical connection, mechanical support) independently, simplifying the overall design while maintaining effectiveness
2Object-affected harmful factors
If isolators are added to isolate the battery pack, then vibration transmission is reduced, but the device complexity increases
Solution Approach 1:
The patent merges multiple functions into the interface member: vibration isolation, electrical connection, and mechanical support are all integrated into a single component. This eliminates the need for separate isolators, electrical contacts, and mounting brackets, reducing overall device complexity while achieving vibration isolation
Solution Approach 2:
The isolating elements within the interface member utilize material property changes (viscoelasticity, damping characteristics) to reduce vibration transmission. By selecting materials with appropriate damping parameters, the system effectively reduces harmful vibrations without requiring complex mechanical isolation structures
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 isolation system significantly reduces high-frequency vibrations transferred to the battery pack, enhancing its durability and extending its life cycle.
Implementation Method 1
a plurality of isolators coupled between the housing and the interface member to isolate the battery pack from the housing during operation of the power tool
Data Source
AI summary
A power tool includes a housing, a motor positioned substantially within the housing, a drive mechanism supported by the housing and coupled to the motor, a battery pack electrically coupled to the motor, and an isolation system. The isolation system includes an interface member positioned substantially within the housing. The interface member receives a portion of the battery pack to electrically couple the battery pack to the motor. The isolation system also includes a plurality of isolators coupled between the housing and the interface member to isolate the battery pack from the housing during operation of the power tool.