Spring-Supported Drill Bit Stopper for Precise Hole Depth
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Solution Overview
Problem
Conventional drill bit depth adjustment methods are cumbersome, requiring coupling and uncoupling of components, are prone to error, and often result in incorrect hole depths due to the need for additional tools and increased thickness, leading to instability during drilling.
Innovation Solution
A depth-adjustable stopper for drill bits that moves axially along a male thread portion, supported by a spring, allowing for easy and accurate depth adjustment without the need for additional tools, featuring a rotational structure body with a female thread for engagement and a bearing for stability, enabling secure and precise depth control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a gradation support with support fastener is used for depth adjustment, then the drill bit travel distance can be set, but the coupling and releasing operation becomes bothersome and requires additional space in the casing
Solution Approach 1:
The depth stopper is integrated directly with the drill bit body, merging the depth adjustment function into the drill bit itself. The stopper includes a threaded rod that screws into the drill bit's internal thread, eliminating the need for separate support fasteners and coupling operations. This integration allows workers to adjust depth by simply rotating the stopper with their fingers.
Solution Approach 2:
The depth adjustment mechanism is extracted from the casing and relocated to the drill bit itself. By moving the adjustment function to the drill bit, the casing no longer needs to accommodate separate depth adjustment components, simplifying both the casing structure and the adjustment operation.
2Strength
If a headless bolt is used for depth adjustment, then the drill bit can be fastened, but the thickness increases and wrench operation is required
Solution Approach 1:
Instead of using a headless bolt that protrudes outward for fastening, the invention uses an internal threaded structure where the stopper screws into the drill bit body. This inverts the fastening approach from external to internal, reducing the overall thickness while maintaining secure fastening through the threaded engagement between the stopper's external thread and the drill bit's internal thread.
3Device complexity
If the stopper is not supported by a spring, then the structure is simpler, but the stopper shakes or pushes back during drilling
Solution Approach 1:
A spring is introduced as an intermediary element between the stopper and the drill bit body. The spring provides continuous contact force that pushes the stopper against the workpiece, ensuring stable depth control during drilling. The spring acts as a mediator that transmits force while allowing for minor movements and vibrations, maintaining stability without requiring a complex rigid structure.
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
Enables stable and precise depth adjustment during drilling, preventing the stopper from shaking or being pushed back, allowing for easier and more accurate hole creation without the need for wrenches or additional space, and reducing the thickness of the drilling tool for deeper penetration.
Implementation Method 1
the depth-adjustable stopper is supported by a spring, thereby prevented from being shaken or pushed back
Data Source
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AI summary
The present invention relates to a depth-adjustable stopper coupled to a drill bit, which may allow for easier drilling using the drill bit and may be supported by the tension of a spring, thereby prevented from being shaken or pushed back.