Adjustable Claw Hammer With Splined Pin Mechanism
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Solution Overview
Problem
Traditional hammers and crowbars with fixed claws struggle to position the claw effectively in tight spaces, making it difficult to extract nails or remove boards, as the claw's fixed orientation limits its usability in confined areas.
Innovation Solution
A hand tool, such as a hammer or crowbar, equipped with a pivotally coupled claw featuring an indexable and lockable pivoting mechanism, utilizing splined pin assemblies or locking pin mechanisms, allowing the claw to be adjusted and locked into various positions relative to the handle, enhancing positioning flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the claw is fixed to the hammer head or handle, then the structure is simple and strong, but the claw cannot be positioned effectively in tight spaces
Solution Approach 1:
The claw is made movable relative to the hammer head through a pivoting mechanism with multiple indexed positions. The claw can rotate between a first position (orthogonal to handle) and a second position (angled relative to handle), allowing adaptation to different working conditions and tight spaces while maintaining structural integrity through positive locking
2Adaptability or versatility
If the claw is fixed in a single position, then the mechanism is simple, but the tool cannot adapt to different working conditions and tight spaces
Solution Approach 1:
The claw attachment mechanism is divided into discrete indexed positions rather than continuous rotation. The splined bore and locking pins create distinct angular positions (first position orthogonal to handle, second position at an angle), allowing the claw to be segmented into specific orientations for different tasks while keeping the mechanism relatively simple
Solution Approach 2:
The claw transitions from a static fixed position to a dynamic multi-position configuration. The pivoting mechanism enables the claw to rotate between predetermined angular positions, providing adaptability to various working conditions while maintaining structural stability through positive locking at each position
3Adaptability or versatility
If the claw is rigidly attached to the handle, then the connection is strong and reliable, but the claw cannot be repositioned for different extraction tasks
Solution Approach 1:
The claw attachment evolves from rigid fixed connection to a controlled dynamic system. The pivoting mechanism with splined bore and locking pins provides reliable positive engagement at each indexed position, ensuring stability and reliability while enabling repositioning for different extraction tasks and working conditions
Data Source
AI summary
An embodiment of a hand tool comprising: a fixed hand tool, such as a hammer or a crowbar, with respect to a handle; a pivoting mechanism; and a claw being coupled to a handle via the pivoting mechanism is described. In another embodiment, the hand tool comprises a fixed tool with respect to a handle, such as a hammer or a crowbar; a coupling mechanism; a claw being coupled to a handle via the coupling mechanism; the coupling mechanism further comprising a splined pin assembly adapted to couple the claw and a handle so as to permit the claw to pivot with respect to the handle, is described. Various pivoting mechanisms including splined pin assemblies and locking pin mechanisms are described.