Power Tool Circuit Board Vibration Isolator for Longer Lifespan
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Solution Overview
Problem
Existing power tools experience significant vibration transfer to their circuit boards, which can lead to reduced lifespan and performance due to oscillations and mechanical stress.
Innovation Solution
Incorporation of a vibration isolator, typically made of foam, positioned between the circuit board and the housing to reduce vibration transfer, specifically compressed between the circuit board and the housing or upper wall, thereby isolating the circuit board from vibrations generated by the tool's operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the circuit board is rigidly mounted within the housing, then structural stability and ease of manufacture are improved, but vibration transfer to the circuit board increases causing mechanical stress and reduced lifespan
Solution Approach 1:
A vibration isolator is introduced as an intermediary element positioned between the circuit board and the housing. This isolator acts as a mediator that blocks the transmission path of vibrations from the motor housing to the circuit board, thereby protecting the circuit board from harmful vibrations while maintaining its mounting stability.
Solution Approach 2:
The vibration isolator changes the mechanical parameters of the mounting system by introducing materials with specific vibration-damping properties. The isolator is made from compounds such as polyurethane, rubber, or foam that have been formulated to absorb and dampen vibrations, thereby changing the transmission characteristics between the housing and circuit board.
2Reliability
If a vibration isolator is added between the circuit board and housing, then vibration transfer is reduced improving reliability, but device complexity increases
Solution Approach 1:
The vibration isolator serves multiple functions simultaneously: it provides mechanical support for the circuit board, isolates vibrations, and can also provide electrical insulation. This multi-functionality reduces the need for additional separate components, thereby limiting the increase in device complexity while achieving vibration reduction.
Solution Approach 2:
The vibration isolator is designed as a simple, often disposable component that can be easily installed and removed. Its simplicity allows for easy replacement if needed, and the design accepts that the isolator may be a basic foam or rubber piece rather than a complex adjustable mechanism, thereby managing complexity through simplicity and ease of replacement.
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 vibration isolator effectively reduces vibration transfer, enhancing the power tool's lifespan and performance by minimizing mechanical stress and oscillations on the circuit board.
Implementation Method 1
a vibration isolator positioned on the circuit board and between the circuit board and the housing. The vibration isolator is configured to reduce the transfer of vibration generated by operation of the power tool to the circuit board
Implementation Method 2
the vibration isolator is made of foam
Data Source
AI summary
A power tool may include a housing including a motor housing portion, a front housing portion coupled to the motor housing portion, and a handle portion extending from the motor housing portion. A power tool may include a motor supported within the motor housing portion. A power tool may include an output driven by the motor to rotate about an axis, the output extending from the front housing portion. A power tool may include an actuator supported by the handle portion and configured to control operation of the motor. A power tool may include a circuit board supported within an accommodating region between the actuator and the front housing portion. A power tool may include a vibration isolator positioned on the circuit board and between the circuit board and the housing.