Blade Attachment System for Oscillating Tools
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Solution Overview
Problem
Existing oscillating power tools require additional material and processing for blades to incorporate a mounting interface, increasing manufacturing costs and limiting the usability of blades when the work portion becomes worn or damaged.
Innovation Solution
A blade configuration without a mounting interface, allowing blades to be manufactured at lower cost, with a blade attachment system that enables quick change capability and secure attachment to the tool holder, enabling blades with cutting edges on both ends for different applications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a mounting interface is incorporated onto the blade, then the blade can be securely attached to the tool holder, but the manufacturing cost increases due to extra material, fabrication, and processing
Solution Approach 1:
The mounting interface features are merged directly into the tool holder structure rather than being separate components. The tool holder includes a mounting surface with a recess that directly receives the blade, eliminating the need for separate mounting interfaces on the blade itself. This combining of functions reduces blade manufacturing complexity while maintaining secure attachment through the tool holder's integrated mounting mechanism.
2Productivity
If the work portion becomes worn or damaged, then the blade must be replaced, but replacing the entire blade is inefficient when only a small part is affected
Solution Approach 1:
The blade is segmented into a work portion and a mounting portion, where the mounting portion includes engagement features that interface with the tool holder. This segmentation allows the blade to be designed with replaceable or regenerable work portions while maintaining a permanent mounting interface, enabling partial replacement or refurbishment of worn sections without discarding the entire blade assembly.
Solution Approach 2:
The mounting interface features are designed to be retained and reused on the tool holder or mounting portion, while only the worn work portion is replaced. The engagement features including recesses, protrusions, or interlocking elements are recovered and reused across multiple blade installations, reducing material waste and improving productivity by maintaining functional components.
3Adaptability or versatility
If a standard tool interface is used, then the tool can accommodate various accessory tools, but blades require additional mounting interfaces that increase complexity
Solution Approach 1:
The tool holder is designed with a universal mounting interface that can accommodate different blade types and configurations. The mounting surface with recess and engagement features serves multiple functions: securing blades, allowing quick changes, and interfacing with various blade geometries. This universal interface eliminates the need for each blade to have its own specialized mounting features, reducing blade structural complexity while maintaining tool versatility.
Data Source
AI summary
A handheld oscillating tool includes a blade attachment system having a tool mounting portion configured to enable the tool mounting portion to be releasably secured to a tool holder of an oscillating tool such that the blade attachment system oscillates with the tool holder and a blade mounting portion configured to releasably retain a blade with a planar body of the blade arranged substantially perpendicular to the oscillation axis and with one of the leading edge and the trailing edge of the blade positioned forwardly with respect to the tool mounting portion.