Capacitor-Driven Working Piston for Fastening Tools
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Solution Overview
Problem
Existing setting tools for driving fastening elements into substrates lack efficiency and quality, particularly in ensuring high-speed and precise insertion of fastening elements.
Innovation Solution
A hand-held tool with a stator and working piston driven by a capacitor-based drive system, featuring a piston coil and stator coil that generate opposing magnetic fields upon rapid discharge, accelerating the working piston relative to the stator, and utilizing soft magnetic materials to enhance magnetic field penetration and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a single coil system is used to drive the working piston, then the device structure is simple, but the driving efficiency and kinetic energy transfer are insufficient
Solution Approach 1:
The single coil system is divided into two separate coil systems: a piston coil system attached to the working piston and a stator coil system attached to the stator. Each coil system has its own capacitor (piston coil capacitor and stator coil capacitor). This segmentation allows independent optimization of each coil's magnetic field generation, improving the overall driving efficiency and kinetic energy transfer to the fastening element while maintaining manageable structural complexity through modular design.
2Speed
If high current is used to generate strong magnetic field for rapid acceleration, then the working piston acceleration is high, but the waste heat generated is excessive
Solution Approach 1:
The single high-current coil is segmented into two separate coil systems (piston coil and stator coil), each with its own capacitor. This allows the total energy to be distributed across two separate discharge events rather than one high-current event, reducing the peak current and associated waste heat in each individual coil while still achieving the required acceleration through the combined effect of both magnetic fields.
Solution Approach 2:
The system recovers kinetic energy by utilizing the repulsion between the working piston and stator during the discharge process. The magnetic field interaction not only accelerates the piston forward but also provides a repulsive force that helps reset the system, reducing the energy that would otherwise be lost as heat and improving overall system efficiency.
3Use of energy by moving object
If the piston coil and stator coil are positioned close together for strong magnetic interaction, then the magnetic field efficiency is high, but the mechanical stress on components increases
Solution Approach 1:
By segmenting the magnetic field generation into two separate coil systems positioned on opposite sides of the working piston, the patent achieves efficient magnetic interaction without requiring the coils to be in direct contact or extremely close proximity. The piston coil generates a magnetic field that interacts with the stator coil's magnetic field through the piston, maintaining high efficiency while reducing mechanical stress on the coil structures and their mounting components.
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 tool achieves high efficiency and quality in driving fastening elements into substrates by optimizing the magnetic field interaction, reducing the load on the drive and tool components, and improving kinetic energy transfer with a smaller maximum force, leading to reduced waste heat and potential for lighter, less expensive construction.
Implementation Method 1
the piston coil being electrically connectable to the piston coil capacitor in order during rapid discharge of the piston coil capacitor to have a current flowing through it and to generate a magnetic field which accelerates the working piston relative to the stator
Implementation Method 2
generate a magnetic field which accelerates the working piston relative to the stator, the magnetic field preferably repels the stator
Implementation Method 3
utilizing soft magnetic materials to enhance magnetic field penetration and efficiency
Data Source
AI summary
A tool for working a substrate has a stator and a working piston, which is intended to move relative to the stator along a working axis and toward the substrate or to hit a fastening element, in order to drive the fastening element into the substrate, also having a drive, which is intended to drive the working piston along the working axis onto the substrate, the drive having a piston coil capacitor and a piston coil arranged on the working piston, the piston coil being electrically connectable to the piston coil capacitor in order during rapid discharge of the piston coil capacitor to have a current flowing through it and to generate a magnetic field which accelerates the working piston relative to the stator.