Dual-Drive Draw Stud for Large-Hole Knockout Punching

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Solution Overview

Problem

Conventional knockout punch tools are limited by the size of holes they can create manually and often require bulky hydraulic systems for larger holes, lacking versatility for use with both manual and powered drivers.

Innovation Solution

A knockout punch tool set featuring a draw stud with a driving end, a front end, and a threaded portion, allowing engagement with both manual and powered tools, and including a punch, die, and connector to form apertures efficiently.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If manual knockout drivers are used, then the tool is simple and easy to operate, but the size of hole that can be created is limited

Engineering Contradiction:

Improvesimplicity of toolVSAvoidsize of hole that can be created

Core Design Contradiction:

Ease of operationVSAdaptability or versatility

Solution Approach 1:

The draw stud is designed with a polygonal driving end that can engage with both manual drivers (through the polygonal interface) and powered drivers (through the recess), allowing the same tool to function across multiple applications and size requirements without needing separate tooling

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Adaptability or versatility

If hydraulic powered systems are used, then larger holes can be created, but the system becomes bulky

Engineering Contradiction:

Improvesize of hole that can be createdVSAvoidbulkiness of system

Core Design Contradiction:

Adaptability or versatilityVSVolume of moving object

Solution Approach 1:

The draw stud serves as a universal interface that accommodates both manual and powered drivers, eliminating the need for separate hydraulic systems while still enabling large hole creation when powered drivers are used

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The invention extracts the essential function of force application from the tool itself, placing it in the separate driver (manual or powered), while the draw stud focuses on the punching function, allowing the system to be scaled without increasing overall bulk

Inventive Principle:

Principle #2Taking out (Extraction)

3Reliability

If separate manual and hydraulic tool sets are used, then each tool is optimized for its specific application, but the overall system complexity increases

Engineering Contradiction:

Improveoptimization for specific applicationVSAvoidnumber of tools required

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The draw stud with its polygonal driving end and recess is designed to work with both manual and powered drivers, consolidating what would otherwise require separate tool sets into a single versatile system

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The invention merges the functionality of manual and hydraulic driver interfaces into a single draw stud design, allowing one tool set to replace multiple specialized tool sets while maintaining optimization for each application type

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentUS20250170635A1Knockout Punch Tool with Draw Stud

Publication Date: 2025.05.29 MILWAUKEE ELECTRIC TOOL CORP

AI summary

A knockout punch tool set is provided. The knockout punch tool set includes a punch, a die, a draw stud, and a driving tool. The draw stud is configured to be used with both a powered and a manual driving tool. The draw stud includes a driving end with a recess. The recess of the draw stud is couplable to a square drive to allow for use with the powered driving tool. The driving end of the draw stud further includes outer surfaces positioned around the recess to allow for engagement with a manual driving tool. In various embodiments, the punch tool set includes a step bit couplable to the draw stud.