Tool-Free Platen Coupling for Interchangeable Power Tool Heads
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Solution Overview
Problem
Existing sanders require the use of hand tools to remove and attach differently shaped platens, which is inconvenient and does not support abrasive media effectively in tool-less coupling systems.
Innovation Solution
A sander with a mode selector and a retaining member that allows for the selective coupling of multiple platens without tools, using a wireframe that nests in grooves around attachment hubs and a button to release the wireframe for easy platen exchange, enabling orbital and random orbit motions with distinct counterbalances and speed control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If threaded fasteners are used to secure platens to the sander, then the platen attachment is secure and reliable, but the platen cannot be removed or changed without using hand tools
Solution Approach 1:
The platen attachment system uses a self-retaining mechanism where the platen's attachment hub automatically engages with the sander body through spring-loaded lugs that snap into place, eliminating the need for external tools or manual fastening operations
Solution Approach 2:
The patent replaces the traditional threaded fastener mechanical system with a spring-loaded lug engagement system that uses elastic deformation and snap-fit mechanics to achieve secure attachment without requiring screws, nuts, or other fastening components
2Ease of operation
If tool-less coupling systems are used to attach platens, then platen exchange is convenient and quick, but the system does not support abrasive media effectively and requires larger components
Solution Approach 1:
The attachment hub is designed with a universal interface that simultaneously provides mechanical retention through spring lugs and supports abrasive media through integrated mounting surfaces and clamping mechanisms, eliminating the need for separate coupling and media support systems
Solution Approach 2:
The patent merges the platen retention function and abrasive media support function into a single integrated attachment hub structure, where the same component that secures the platen to the sander also provides the mounting interface for abrasive sheets or scrolls
3Adaptability or versatility
If multiple differently shaped platens are used for different sanding tasks, then the sander becomes more versatile, but the complexity of attaching and detaching different platens increases
Solution Approach 1:
The platen attachment system is segmented into a standardized interface on the sander body and a matching interface on various platen types, allowing different shaped platens to be exchanged while maintaining a consistent, simple attachment mechanism across all configurations
Solution Approach 2:
The attachment hub incorporates asymmetric features such as keyed slots or oriented lugs that provide natural alignment during platen attachment, preventing incorrect installation and simplifying the exchange process by eliminating the need for trial-and-error orientation
Data Source
AI summary
A power tool that includes a tool body housing, a drive system, a tool head and a connection system. The drive system is housed in the tool body housing. The tool head, which is configured to perform work on a work piece, includes a tool head housing and an input member that is driven by the drive system when the tool head is coupled to the tool body housing. The tool head can be engaged to the tool body housing in at least two pre-defined and distinct orientations. The connection system secures the tool head to the tool body housing in each of the at least two pre-defined and distinct orientations.