Electric Fastener Driver Vacuum Piston Mechanism
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Solution Overview
Problem
Existing fastener driving apparatuses face issues such as complexity, high cost, unreliability, poor ergonomics, non-portability, high reaction force, short life, and safety hazards due to reliance on fuel cells, air hoses, mechanical springs, or cumbersome flywheel mechanisms, limiting their ability to drive full-size fasteners efficiently and safely.
Innovation Solution
A portable, electric fastener driving apparatus using a drive piston within a cylinder, actuated by an electrical motor with an interrupted drive mechanism that creates a vacuum to drive the fastener, featuring a biasing element for maintaining the piston at the bottom dead center position and a check valve for jam clearance, enhancing safety and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a pneumatic fastener gun is used, then fastener driving speed and productivity are improved, but the device requires tethering to an air compressor and loses portability
Solution Approach 1:
The invention extracts the air compressor from the system by using a portable battery-powered motor to directly drive the piston, eliminating the need for external air supply equipment and air hoses, thus achieving portability while maintaining fastener driving capability
2Ease of operation
If a fuel cell system is used, then portability is improved, but the device becomes more complex and expensive
Solution Approach 1:
The invention replaces the complex fuel cell combustion system with a simpler electrical motor-driven piston system, using electrical energy to directly drive the mechanical piston without requiring fuel storage, combustion chambers, or exhaust systems
Solution Approach 2:
The invention uses a pneumatic piston driven by electrical power instead of chemical combustion, creating a simpler system that uses electrical energy to move the piston and drive fasteners without the complexity of fuel cell chemistry and combustion control
3Device complexity
If a solenoid or spring system is used, then simplicity is improved, but the device is limited to short fasteners and produces high reactionary force
Solution Approach 1:
The invention uses a motor-driven piston that rapidly accelerates and delivers the fastener in a single quick stroke, completing the driving action before significant reactionary force can build up, allowing longer fasteners to be driven with reduced perceived reaction
4Force
If a flywheel mechanism is used, then fastener driving capability is improved, but the device weight and size increase
Solution Approach 1:
The invention extracts the heavy flywheel from the system by using a lightweight battery-powered motor to provide the necessary driving force, eliminating the need for large rotating mass while maintaining sufficient energy delivery for driving full-size fasteners
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 cost-effective, portable, and ergonomic fastener driving system with reduced wear and tear, capable of driving full-size fasteners with minimal reactionary force, improved safety, and increased energy efficiency compared to traditional pneumatic or mechanical systems.
Implementation Method 1
The drive mechanism causes the drive piston to move away from BDC to create or increase a vacuum between the drive piston and the bottom of the cylinder
Implementation Method 2
A biasing element (such as a spring or elastomer, for example) may be provided for holding the drive piston at the BDC position until the drive mechanism acts upon the drive piston
Implementation Method 3
A portable, electric fastener driving apparatus using a drive piston within a cylinder, actuated by an electrical motor
Data Source
AI summary
A fastener driving apparatus includes a drive mechanism, a drive piston disposed with in a cylinder and operatively coupled to the drive mechanism, and an anvil coupled to the drive piston. The apparatus also preferably comprises a biasing element for temporarily holding the drive piston at BDC of the piston cylinder. The drive mechanism is capable of selectively applying force on the drive piston to move the drive piston away from BDC of the piston cylinder. When the drive mechanism engages the drive piston to move the drive piston away from BDC, a vacuum is generated in the cylinder, which vacuum, after the drive mechanism disengages the drive piston, acts on the drive piston to cause the piston to move toward BDC and the anvil to drive a fastener. A sealed air chamber on the side of the piston opposite the vacuum may assist in generating force.