Universal Shaft Cutting Tool Kit for Interchangeable Bits

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Solution Overview

Problem

Existing rotary cutting tools for power tools are limited in their ability to efficiently and easily switch between cutting different sized holes, requiring multiple tools and complex assembly processes.

Innovation Solution

A universal shaft with a locking assembly and interchangeable cutting bits allows for a single tool to be used for various hole sizes, enabling quick and secure attachment to a power tool, with a housing and connecting structure for storage and transport.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If multiple separate cutting tools are used for different hole sizes, then cutting capability for various hole sizes is improved, but device complexity and number of tools required increases

Engineering Contradiction:

Improvecutting capability for various hole sizesVSAvoidnumber of tools required

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent implements a universal shaft system that can accommodate multiple cutting bits of different sizes through a standardized interface. The shaft includes a standardized bore and locking mechanism that accepts various cutting bits, allowing a single shaft assembly to perform multiple cutting functions across different hole sizes, thereby eliminating the need for multiple separate tools.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The cutting tool system is divided into separable components: a universal shaft and interchangeable cutting bits. This segmentation allows the cutting bits to be independently selected and replaced based on the required hole size, while the universal shaft remains constant. The modular design enables versatility without increasing overall system complexity.

Inventive Principle:

Principle #1Segmentation

2Adaptability or versatility

If interchangeable cutting bits are implemented, then versatility for different hole sizes is improved, but assembly and switching complexity increases

Engineering Contradiction:

Improveinterchangeable cutting bits capabilityVSAvoidassembly and switching process

Core Design Contradiction:

Adaptability or versatilityVSEase of operation

Solution Approach 1:

The universal shaft is pre-configured with a standardized locking mechanism and bore dimensions that match the cutting bits. The cutting bits are pre-designed with corresponding engagement features, allowing for quick identification and proper alignment during assembly. This preliminary standardization eliminates the need for complex alignment procedures during switching.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The universal shaft acts as an intermediary component between the power tool and various cutting bits. It provides a standardized interface that simplifies the connection process, serving as a mediator that handles the complexity of interfacing with different cutting bit sizes while presenting a uniform interface to the user.

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS8376665B2Cutting tool, cutting tool kit, and method of operating the same

Publication Date: 2013.02.19 MILWAUKEE ELECTRIC TOOL CORP

AI summary

A rotary cutting system for releasable connection to a power tool, the power tool including a housing, a motor supported in the housing and a drive mechanism driven by the motor, the rotary cutting system comprising a universal shaft having a first shaft end and a second shaft end positioned opposite the first shaft end, the first shaft end being removably securable to the power tool, and a cutting tool having a first tool end, and a second tool end spaced a distance of at least 3.5 inches from the first tool end and operable to cut a workpiece, the first tool end being removably securable to the second shaft end of the universal shaft.