Cordless Handheld Punch Tool With Debris Collection Locking Die
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Solution Overview
Problem
Handheld reciprocating punch tools, or nibblers, generate numerous small, sharp fragments during cutting operations, and are limited by the need for AC power or compressed air, restricting access and maneuverability.
Innovation Solution
A battery-powered handheld punch tool with a drive unit, reciprocating mechanism, and die assembly, featuring a chip bag assembly to collect debris, a trigger mechanism for speed control, and a die holder lock for secure positioning, all integrated into a clamshell housing for improved safety and maneuverability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If AC power or compressed air is used to power the punch tool, then the tool can operate continuously, but access and maneuverability are restricted due to power cord or air hose requirements
Solution Approach 1:
The patent replaces the external power source system (AC power cord or compressed air hose) with an integrated battery-powered drive unit. This substitution eliminates the physical constraints of cords and hoses, enabling cordless operation while maintaining continuous operation capability through the battery's energy storage capacity.
Solution Approach 2:
The battery-powered drive unit serves multiple functions: it provides portable power, enables cordless operation, and integrates directly into the tool housing. This multi-functional design resolves the contradiction by combining the continuous operation capability of powered tools with the maneuverability of handheld devices.
2Reliability
If a traditional die holder locking mechanism is used, then the die holder can be secured, but the locking and unlocking process is time-consuming
Solution Approach 1:
The patent employs a dynamic spring-loaded plunger mechanism that automatically engages with the die holder upon insertion and can be quickly released by actuating a release lever. This dynamic system replaces static, multi-step locking procedures with an automatic, spring-assisted engagement that maintains secure holding while enabling rapid release.
Solution Approach 2:
The spring-loaded plunger mechanism allows the die holder to be quickly locked into position by simply inserting it, skipping the need for manual adjustment or multiple locking steps. The release lever similarly enables rapid unlocking by bypassing complex disengagement procedures, thus reducing the time for both locking and unlocking operations.
3Productivity
If numerous small fragments are ejected during cutting, then the cutting operation can be completed, but the fragments are sharp and difficult to clean up
Solution Approach 1:
The patent converts the harmful sharp debris fragments into a contained, manageable form by directing them into a collection bag attached to the tool. The cutting operation continues to generate fragments as before, but the harmful dispersion is transformed into controlled collection, turning the waste problem into a contained byproduct that can be easily disposed of.
Solution Approach 2:
The collection bag serves as an intermediary between the cutting operation and the environment. It intercepts the sharp debris fragments before they can be ejected into the workspace, acting as a mediator that captures the harmful byproduct and prevents it from becoming a cleanup hazard while allowing the cutting operation to proceed uninterrupted.
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 effectively reduces debris generation, operates cordlessly, and enhances user control and accessibility by allowing for both hands to be used during operation.
Implementation Method 1
a biasing element disposed between the fastener and the plunger, the biasing element configured to preload the plunger against the die holder in response to rotation of the fastener relative to the plunger base
Implementation Method 2
a reciprocating mechanism operatively coupled to the transmission, the reciprocating mechanism configured to convert rotational torque from the transmission into a reciprocating motion
Data Source
AI summary
A handheld punch tool includes a housing having a handle, a battery receptacle, and a gearcase coupled to the handle opposite the battery receptacle. A cutting head is coupled to the gearcase, a drive unit is disposed within the housing, and a drive train is coupled to the drive unit. The drive train includes a transmission for providing torque to the drive unit, and a reciprocating mechanism coupled to the transmission for reciprocally driving a punch. The handheld punch tool further includes a die assembly having a die holder and a die. A die holder lock is coupled to the housing to lock the die holder thereto, and includes a plunger base coupled to the gearcase, a plunger for engaging the die holder, a fastener threaded to the plunger base, and a biasing element between the fastener and the plunger for preloading the plunger against the die holder.