Hole Saw Quick Release Device for Small Diameter Drilling
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Solution Overview
Problem
Conventional hole saw assemblies lack a reliable quick release device for hole saws with diameters smaller than 30 mm, leading to issues with drill rod offset and inefficient replacement, which can be hazardous during operation.
Innovation Solution
A quick release device comprising a ring, sleeve, and drive body with a threaded and hexagonal structure allows for direct assembly and easy replacement of the drill rod, preventing offset and enabling secure locking and unlocking, suitable for hole saws with diameters up to 30 mm.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional quick release device with drive pins is used, then it is suitable for hole saws with large diameter (greater than 30 mm), but it cannot be applied to hole saws with small diameter (30 mm or less) due to insufficient contact surface width
Solution Approach 1:
The quick release device is divided into separate components: a ring component that interfaces with the hole saw, a drive body component that interfaces with the drill rod, and a spring mechanism. This segmentation allows each component to be optimized for its specific function and enables the device to work with different hole saw diameters without requiring complete redesign.
Solution Approach 2:
The ring component with the threaded hole serves multiple functions: it provides a mounting interface for various hole saw diameters, acts as a connector between the hole saw and drive body, and incorporates the quick release mechanism. This multi-functionality allows a single device design to accommodate different hole saw sizes.
2Ease of operation
If a spring-based locking mechanism is used in the quick release device, then quick mounting and release are enabled, but the spring may undergo elastic fatigue over time causing loss of locking capability
Solution Approach 1:
The spring mechanism is designed to provide continuous elastic force that maintains the locked state before any failure occurs. The spring's elastic deformation capacity allows it to absorb minor impacts and variations in loading, providing a buffer against premature failure and maintaining reliable locking action throughout its service life.
3Productivity
If the drill rod is fixed in the hole saw without a proper quick release device, then structural simplicity is maintained, but drill rod offset during rotation occurs and replacement is inefficient
Solution Approach 1:
The hexagonal hole in the ring component and the corresponding hexagonal drive body create a self-aligning and self-positioning mechanism. The geometric shapes automatically ensure proper orientation and positioning of the drill rod during mounting, eliminating offset issues without requiring additional alignment procedures or complex adjustment mechanisms.
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 provides a secure and efficient method for mounting and replacing the drill rod, preventing offset during rotation and allowing for quick release, enhancing user safety and operational efficiency for hole saws with smaller diameters.
Implementation Method 1
a spring is fitted over the hexagonal portion
Implementation Method 2
The threaded portion is extended from the ring and the flange of the ring is around the extension portion of the sleeve
Data Source
AI summary
A hole saw assembly is revealed. The hole saw assembly is a hole saw with a quick change drill rod. The hole saw assembly includes a quick release device and the drill rod, both arranged at the hole saw. The drill rod is inserted through the quick release device and the quick release device is for fastening and releasing a drill head of the drill rod. Thereby the drill rod is fitted over the quick release device and users can fasten and release the drill rod quickly. Users can also quickly mount a shank of the drill rod quickly into the hole saw. The drill rod is fast slid out of the quick release device for replacement of a new drill rod. Then the shank is locked on the hole saw so that the shank and the hole saw can rotate synchronously.