Spring-Biased Battery Pack Receptacle for Power Tool Vibration Isolation
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Solution Overview
Problem
Power tools, such as fastener drivers, experience significant vibration and impact during use, which can lead to battery pack damage and reduced tool lifespan due to the lack of effective shock absorption and secure terminal connections.
Innovation Solution
A battery pack receptacle system within the power tool housing, featuring a movable battery pack attachment portion with a spring or resilient body that biases the receptacle, allowing it to absorb vibrations and impacts, and secure power tool terminals that minimize decoupling, ensuring stable electrical communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the battery pack receptacle is fixed rigidly to the housing, then the electrical connection is stable, but the battery pack and terminals are damaged by vibration and impact
Solution Approach 1:
The battery pack receptacle is separated from the housing into two independent components, allowing each to be optimized for its specific function - the housing provides structural stability while the receptacle provides shock absorption protection
Solution Approach 2:
A spring mechanism is introduced as an intermediary element between the housing and battery pack receptacle, serving as a mediator that absorbs vibration and impact while maintaining electrical connection through the resilient body
2Object-affected harmful factors
If the battery pack receptacle is made movable with spring biasing, then vibration and impact are absorbed, but the structure becomes more complex
Solution Approach 1:
A resilient body is used to create a flexible connection between the receptacle and housing, providing vibration absorption through elastic deformation rather than complex mechanical mechanisms
Solution Approach 2:
The spring constant and pre-compression force of the resilient body are optimized to provide adequate vibration absorption while maintaining a compact, simple structure that does not excessively increase device complexity
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 system effectively absorbs vibrations and impacts, protecting the battery pack and power tool terminals, enhancing the tool's robustness and extending its lifespan by preventing forceful impacts from being transmitted to the battery pack.
Implementation Method 1
One of a spring or a resilient body is positioned between the battery pack attachment portion and the battery pack receptacle and is configured to bias the battery pack attachment relative to the battery pack receptacle
Data Source
AI summary
A power tool includes a housing that defines a battery pack attachment portion, which has a first cavity and a flange. A printed circuit board and a motor are positioned within the housing. The motor is electrically communicates with the printed circuit board. A battery pack receptacle is positioned within the first cavity, is movably coupled to the battery pack attachment portion. The battery pack receptacle includes a groove in which the flange of the battery pack attachment portion is received and a second cavity configured to receive at least a portion of a battery pack. One of a spring or a resilient body is positioned between the battery pack attachment portion and the battery pack receptacle and is configured to bias the battery pack attachment relative to the battery pack receptacle. Power tool terminals are supported by the battery pack receptacle and electrically communicate with the printed circuit board.