Hole Saw Arbor Locking Sleeve for Jam-Free Quick Release
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Solution Overview
Problem
Existing hole saw arbor assemblies face issues with complex mechanisms that often jam or wear out, leading to ineffective quick-release and attachment of hole saws to power tools, requiring multiple components that increase manufacturing complexity and cost.
Innovation Solution
A monolithic sleeve with a cantilevered leaf spring locking member is integrated into the arbor assembly, allowing for a simple and cost-effective solution by eliminating the need for additional components like ball detents and springs, and utilizing additive manufacturing for reduced production steps and material usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If complex mechanisms with multiple components (ball detents, springs) are used for quick-release, then the release function is achieved, but the device complexity increases and reliability decreases due to jamming and wear
Solution Approach 1:
The locking member is integrated as a single monolithic piece combining the sleeve and locking functionality, eliminating the need for separate ball detents and springs. This merging of components reduces device complexity while maintaining the quick-release function through a unified structure that is less prone to jamming and wear.
Solution Approach 2:
The invention extracts and eliminates unnecessary intermediate components (ball detents, springs) from the locking mechanism, retaining only the essential locking member that performs both support and locking functions. This simplification reduces component count and improves reliability by removing parts that can fail.
2Ease of manufacture
If multiple components are used in the arbor assembly, then the locking function is achieved, but the manufacturing complexity and cost increase
Solution Approach 1:
The sleeve and locking member are combined into a single monolithic component manufactured as one piece using additive manufacturing. This eliminates the need for separate manufacturing processes and assembly steps for multiple components, significantly reducing manufacturing complexity and cost while maintaining full locking functionality.
Solution Approach 2:
The invention employs additive manufacturing technology to produce the monolithic locking member, representing a fundamental change in the manufacturing parameter from traditional subtractive or assembly-based methods. This manufacturing approach simplifies production by creating complex geometries in a single process step without requiring multiple components.
3Device complexity
If a monolithic design is used, then the manufacturing cost and complexity are reduced, but the functionality must be maintained without additional components
Solution Approach 1:
The monolithic locking member is designed to perform multiple functions within a single structure: it provides support for the hole saw, executes the locking action, and enables quick-release functionality. This multi-functionality ensures that the simplified single-component design maintains all necessary adaptability and versatility previously achieved through multiple specialized 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 solution provides a reliable and efficient mechanism for securing and releasing hole saws, reducing component complexity, manufacturing costs, and preventing jamming, while enabling interchangeable hole saws and pilot bits with a single, monolithic piece design.
Implementation Method 1
a cantilevered leaf spring locking member integrated into the arbor assembly
Data Source
AI summary
A cutting tool includes a hole saw and an arbor assembly removably coupled to the hole saw. The arbor assembly includes a shank having a first end, a second end opposite the first end and configured to be coupled to a power tool, a body between the first and second ends, and an longitudinal axis extending centrally through the shank between the first and second ends. The body includes a recess. The arbor assembly also includes a sleeve supported by the shank, the sleeve including a central bore that receives the shank and a locking member positioned in the central bore, the locking member formed as a single, monolithic piece with a remainder of the sleeve, the sleeve moveable between a first position, in which the locking member engages the recess, and a second position, in which the locking member is spaced apart from the recess.