Hole Saw Adapter With Axial Drill Displacement for Core Removal
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Solution Overview
Problem
Existing hole saw adapters are cumbersome and require specialized tools to remove the core after drilling, as they can be heavy to operate and necessitate specific drills, making the process inefficient and costly.
Innovation Solution
A universal hole saw adapter with a longitudinally running axial groove and a displaceable holding part connected to an external displacement part, allowing for axial displacement of the central drill to push out the core, which can be manually or mechanically assisted, and using magnets and pegs for secure fastening and positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an ejector ring is used to maintain the central drill in the axial groove, then the central drill is secured in position, but it becomes very heavy to displace the ejector ring
Solution Approach 1:
The invention extracts the displacement function from the securing mechanism by introducing a separate displacement part that can be independently operated. The ejector ring's securing function is maintained while the displacement action is transferred to a dedicated component that can be easily manipulated without affecting the securing reliability.
Solution Approach 2:
The adapter is segmented into distinct functional parts: the adapter body with axial groove, the central drill, and a separate displacement part. This segmentation allows each component to perform its specific function independently - the adapter body provides the guiding groove, the central drill performs the drilling, and the displacement part handles core removal, making the overall system easier to operate.
2Reliability
If a specialized drill is used to fit into and fasten to the ejector ring, then the drill is securely held, but standard drills cannot be used
Solution Approach 1:
The adapter body with its axial groove serves as a universal interface that can accommodate standard drills. The groove guides the drill and provides structural support, allowing the adapter to work with conventional drill bits rather than requiring specialized tools, thereby increasing versatility while maintaining secure fastening through the groove structure.
3Ease of operation
If the adapter is designed with complex components for core removal, then core removal functionality is achieved, but production costs increase
Solution Approach 1:
The displacement part is designed to be manually operated to push out the core, eliminating the need for complex automated ejection mechanisms. The simple push-action allows the operator to directly remove the core using the displacement part, achieving core removal functionality with minimal components and reduced manufacturing complexity.
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
Simplifies the removal of drill cores by enabling easy axial displacement of the central drill within the adapter, allowing for the use of standard drills and reducing production costs, while ensuring secure fastening and easy operation.
Implementation Method 1
it can simply be equipped with a spring, hydraulic, compressed air or other means to drive out the core
Data Source
AI summary
Hole saw adapter (10) comprised of an adapter body (12) with a first end equipped with a spindle (14) for fastening to a drive unit, such as a drilling machine, and a second end to receive a hole saw (32) and a central drill (34), in which the adapter body (12) is extended and equipped with a longitudinally running axial groove (16) where the longitudinally running axial groove (16) is at least partially formed as a cross-wise through-running open slit in the adapter body (12). The central drill (34) is fasten to the inner axially displaceable holding part (22) so that it can be made loose, said inner axially displaceable holding part (22) can be displaced in the longitudinally running axial groove (16) in the adapter body (12) and is fastened to an external displacement part (18), as the external displacement part (18) surrounds the adapter body (12) and is set up for a forced axial displacement of the axially displaceable holding part (22) and the central drill (34) in the longitudinally running axial groove (16) for the pushing out of a core (40) that remains in the hole saw (32) after drilling.