Modular Hand Tool with Interchangeable Shafts
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Solution Overview
Problem
Existing hand tools are limited by fixed shaft lengths, which do not accommodate varying user preferences or work conditions, limiting versatility and ergonomic comfort.
Innovation Solution
A modular hand tool system comprising a tool head, a shaft, a sleeve, and a clamp that allows the tool head to be removably connected to the shaft, enabling easy switching between different shaft lengths and allowing the tool head to be used independently or extended with additional shafts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If hand tools are manufactured with fixed shaft lengths, then manufacturing simplicity is maintained, but versatility and adaptability to different work conditions are reduced
Solution Approach 1:
The tool is divided into separate modular components: a tool head, a shaft, and an extension shaft that can be independently assembled or disassembled. The connection mechanism includes a sleeve with internal threading and a clamp assembly that can be attached to either the shaft or extension shaft, allowing the tool head to be connected to different shaft configurations based on work requirements.
2Adaptability or versatility
If a removable connection mechanism is added to allow shaft switching, then versatility is improved, but device complexity and assembly difficulty increase
Solution Approach 1:
The connection mechanism employs a nested structure where the clamp assembly fits within the sleeve, and the sleeve itself is positioned within the connection interface between the tool head and shaft. The clamp includes an inner jaw and outer jaw that nest together, with the clamp body housing the fastening mechanism. This nested arrangement consolidates multiple components into a compact unit that simplifies assembly while maintaining the removable connection capability.
Data Source
AI summary
An attachment system and method allows reversely operating a working head with a shaft of different lengths selectively. A first hand tool is reversely connected to an extension shaft to obtain a second, longer-shafted hand tool, both fully operational and sturdy for hand-use, according to applications, work conditions and ergonomics. A range of different lengths hand tools may be contemplated, such as shovels, forks, trowels, transplanters, weed cutters, rakes, hoes, planters, and scoops, for example.