Fastener Driver PCB Damping for Vibration Reliability
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Solution Overview
Problem
Existing fastener drivers face power, size, and cost constraints, particularly those using compressed air or electrical energy, which limit their effectiveness and efficiency.
Innovation Solution
A gas spring-powered fastener driver with a brushless direct current (BLDC) motor, a lifter mechanism, and a vibration attenuating damper, utilizing a removable battery pack and a housing design that includes a cylinder support, drive unit support, and handle portion, with a driver blade and piston mechanism for driving fasteners into a workpiece.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If compressed air or electrical energy is used to power fastener drivers, then the driving force is sufficient, but the device size increases and cost increases
Solution Approach 1:
The patent extracts the heavy external power sources (air compressors, electrical motors) and replaces them with a compact internal gas spring mechanism. The gas spring is pre-charged and stored within the driver body, eliminating the need for bulky external compression systems while maintaining sufficient driving force for fastener installation.
Solution Approach 2:
The patent changes the energy storage parameter from external continuous supply (air/electricity) to internal stored potential energy (gas spring). This parameter change allows the device to maintain high force output during the driving stroke while significantly reducing the overall device volume by eliminating continuous power supply components.
2Force
If compressed air or electrical energy is used to power fastener drivers, then the driving force is sufficient, but the cost increases
Solution Approach 1:
The patent removes expensive external power supply systems (air compressors, motors, control electronics) and replaces them with a simple, inexpensive gas spring mechanism. This extraction of complex subsystems significantly reduces manufacturing costs while maintaining the necessary driving force through the optimized gas spring design.
Solution Approach 2:
The patent employs a disposable or replaceable gas spring cartridge that can be easily replaced when depleted, eliminating the need for expensive repairable complex systems. This approach reduces overall system cost by using simple, inexpensive consumable components rather than expensive durable systems requiring maintenance.
3Adaptability or versatility
If a battery pack is removably coupled to the handle portion, then the device becomes more versatile and portable, but the device complexity increases
Solution Approach 1:
The patent segments the power supply system into a removable battery pack that couples to the handle portion and a fixed gas spring mechanism in the body. This segmentation allows the battery to be easily attached or removed based on application needs, providing portability benefits while isolating the complex electrical components from the main driving mechanism.
Solution Approach 2:
The handle portion is designed with universal coupling capability to accept removable battery packs, allowing the device to function in both battery-powered portable mode and potentially other power modes. This multi-functional design increases versatility while keeping the complexity contained in modular, easily replaceable components.
4Reliability
If a vibration attenuating damper is positioned between the housing and the printed circuit board, then the reliability improves, but the device complexity increases
Solution Approach 1:
The patent incorporates a vibration attenuating damper between the housing and the printed circuit board to preemptively protect sensitive electronics from vibration damage during operation. This beforehand cushioning approach prevents reliability issues before they occur by isolating the PCB from the high-vibration driving environment, adding minimal complexity for maximum reliability benefit.
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 solution provides a compact, efficient, and cost-effective fastener driver that operates without external air pressure, offering reliable and controlled fastener driving with reduced vibration and improved impact absorption.
Implementation Method 1
the drive unit including a brushless direct current (BLDC) motor
Implementation Method 2
a vibration attenuating damper positioned between the housing and the printed circuit board
Implementation Method 3
A gas spring-powered fastener driver with a brushless direct current (BLDC) motor, a lifter mechanism
Data Source
AI summary
A powered fastener driver including a housing, a cylinder, a piston movable within the cylinder from a TDC position to a BDC position, a driver blade attached to the piston for movement therewith along a driving axis from the TDC position toward the BDC position for driving a fastener into a workpiece, a lifter operable to move the piston and driver blade, in unison, from the BDC position toward the TDC position, a drive unit operably coupled to the lifter, and a printed circuit board (PCB) positioned within the housing. The PCB receives electrical current from the battery pack and includes power switches for commutating the motor. The PCB defines a length and a width, and a vibration attenuating damper is positioned between the housing and the printed circuit board. The damper is positioned along the length of the PCB and is configured to support the PCB within the housing.