Core Drill Adapter Coupling for Easy Bit Release and Core Removal
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Solution Overview
Problem
Core drill bits often bind to adapters during use, requiring significant force for removal and risking damage, and the core material can become jammed within the drill bit, making subsequent use difficult, especially when increasing the diameter of existing openings.
Innovation Solution
A tool with a releasable coupling mechanism using a coupling pin with a resilient retainer clip and an axial passage for core removal, allowing for easy detachment of the drill bit without tools and facilitating the use of a core removal tool to dislodge stuck material, along with an alignment tool using a support member and helical spring for coaxial expansion of openings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a core drill bit is threaded onto an adapter for use, then the drill bit can be securely mounted for drilling operations, but the drill bit may bind or become jammed on the adapter during use, requiring tools and excessive force for removal
Solution Approach 1:
The adapter is divided into two separate parts: a first part that mounts to the power tool and a second part that attaches to the drill bit. These parts are connected by a releasable coupling mechanism (coupling pin with retainer clip) that allows easy separation. This segmentation enables secure mounting during operation while facilitating tool-free removal by simply releasing the coupling pin.
Solution Approach 2:
The coupling mechanism transitions from a static threaded connection to a dynamic releasable coupling. The coupling pin with resilient retainer clip provides a connection that is secure during drilling but can be quickly released without tools, allowing the adapter parts to be separated by simple manual action rather than requiring unscrewing operations.
2Reliability
If the core drill bit is securely fastened to the adapter, then drilling performance is improved, but the core material becomes jammed within the drill bit void, making subsequent use difficult
Solution Approach 1:
The core removal tool is inserted through the second part of the adapter (the part attached to the drill bit) to access and remove the jammed core material from the drill bit's central void. This extraction approach allows core removal without detaching the drill bit from the adapter, maintaining drilling performance while solving the core extraction problem.
3Adaptability or versatility
If an existing opening is enlarged to accommodate larger pipes or flues, then the new equipment can be installed, but aligning the new opening coaxially with the existing one is problematic
Solution Approach 1:
A support member is inserted into the existing opening before enlarging it. This support member acts as a preliminary guide that maintains the position and orientation of the existing opening. When the opening is enlarged using the core drill bit, the support member ensures the new larger opening remains coaxially aligned with the original opening, solving the alignment problem before the actual enlargement occurs.
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
The solution prevents damage to drill bits by reducing the need for excessive force during detachment and allows for efficient core removal and alignment of new openings coaxially with existing ones, ensuring smooth operation and minimizing strain on power tools.
Implementation Method 1
the coupling pin including a resilient retainer clip section that resiliently extends around at least part of, and engages, the first or second part to retain the coupling pin in position
Data Source
AI summary
A tool is described comprising a first part (14) adapted to be received by a part of a power tool, in use, and a second part (20) adapted to cooperate, in use, with a core drill bit (12), the first and second parts (14, 20) being releasably couplable to one another by a releasable coupling including a coupling pin (30) that, in use, extends within aligned passages (26, 28) formed in the first and second parts (14, 20), the coupling pin (30) including a resilient retainer clip section (32) that resiliently extends around at least part of, and engages, the first or second part (14, 20) to retain the coupling pin (30) in position. An arrangement in which a support member is carried by the second part is also described.