Magnetic Power Tool Guard and Adaptor for Quick Tool Changes
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Solution Overview
Problem
Existing power tools are limited in their ability to accommodate a wide range of accessory tools due to specific tool holders that can only retain tools designed for specific tasks, restricting their versatility and functionality.
Innovation Solution
A portable power tool design featuring a magnetically attracted attachment system that allows for interchangeable tool holders and adaptors, enabling the retention of accessory tools with different shank types, and a modular guard/guide attachment system for enhanced versatility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If power tools are designed with specific tool holders for particular tasks, then the tool can perform its designated function reliably, but the tool cannot accommodate accessory tools with different shank types, limiting versatility
Solution Approach 1:
The patent applies universality by designing a tool holder with a universal interface that can accommodate multiple types of accessory tools through magnetic attraction. The tool holder includes a magnetic component that can retain various shank types (round, square, hexagonal) without requiring different holder configurations, allowing one tool holder to perform multiple functions.
Solution Approach 2:
The patent uses an intermediary approach by introducing a magnetic field as a mediator between the tool holder and accessory tools. The magnetic component acts as an intermediary mechanism that enables retention of different shank types without direct mechanical engagement, bridging the gap between fixed tool holder designs and variable accessory requirements.
2Ease of operation
If power tools use fixed tool holders for specific accessory types, then the retention is secure during operation, but the operator cannot quickly interchange different types of accessory tools
Solution Approach 1:
The patent applies dynamics by transitioning from static mechanical retention to a dynamic magnetic retention system. The magnetic field allows the accessory tool to be easily attached and detached by simply bringing it near the tool holder, while during operation, the magnetic force maintains secure retention. This dynamic system adapts between easy interchange during non-operation and secure retention during operation.
Solution Approach 2:
The patent replaces traditional mechanical retention systems (screws, clamps, keyed interfaces) with a magnetic field-based retention system. This substitution eliminates complex mechanical engagement mechanisms while providing both easy interchangeability and secure retention, as the magnetic force can be easily engaged by proximity and maintains strong holding force during operation.
3Adaptability or versatility
If power tools are designed with specialized guards and guides for specific tasks, then safety and precision are improved, but the tool cannot perform multiple tasks with different guard requirements
Solution Approach 1:
The patent applies universality to the guard attachment system by designing a magnetic interface that can accommodate multiple types of guards and guides on the same tool. The nose portion includes a magnetic component that can retain various guard configurations, allowing one tool to safely perform multiple tasks with different guard requirements without requiring specialized attachment mechanisms for each guard type.
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
Enables the use of a variety of accessory tools and guards/guides on power tools, broadening their capabilities and allowing operators to perform multiple tasks with a single tool, improving efficiency and versatility.
Implementation Method 1
The attachment interface and the housing interface are configured to be magnetically attracted to each other with sufficient force to retain the attachment on the nose portion of the housing during normal operating conditions
Data Source
AI summary
A portable power tool includes a housing, a motor enclosed within the housing, an accessory tool holder secured to the output shaft of the motor, and an attachment interface on a nose portion near the accessory tool holder. An attachment is configured to attached and removed from the nose portion of the housing. The attachment includes a housing interface that is configured to interact with the attachment interface to position the attachment at a predetermined position on the nose portion of the housing. The attachment interface and the housing interface are configured to be magnetically attracted to each other with sufficient force to retain the attachment on the nose portion of the housing during normal operating conditions while allowing the attachment to be removed from the nose portion of the housing by hand by the operator.