Tool Bit Extractor with Impact Handle for Stuck SDS Drill Bits
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Solution Overview
Problem
Drill bits with SDS, SDS+, or SDS max shanks often become stuck in harder workpieces, making their removal particularly difficult with existing methods and tools.
Innovation Solution
A tool bit extractor featuring a shaft with a cap assembly and bit retention assembly, along with a moveable handle containing a mass that impacts the cap assembly to generate a pulling force and facilitate the removal of stuck drill bits, utilizing a shaft with ball detents and slots for power tool compatibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing removal methods are used on drill bits with SDS, SDS+, or SDS max shanks stuck in harder workpieces, then the drill bit cannot be effectively removed, but using more force or different tools increases device complexity and operation difficulty
Solution Approach 1:
The handle is made moveable relative to the shaft, allowing it to be rapidly moved between the first and second ends to generate dynamic impact forces. This dynamic mechanism enables effective removal of stuck drill bits without requiring complex static force multiplication systems
Solution Approach 2:
The rapid movement of the handle creates impact forces that generate vibrations in the shaft and bit retention assembly, helping to break the bond between the drill bit and workpiece. This vibration-based approach simplifies the removal process compared to pure mechanical force application
2Force
If a moveable handle with mass is used to impact the cap assembly, then pulling force is generated to remove the drill bit, but the device requires additional components increasing complexity
Solution Approach 1:
The handle, mass, and impact mechanism are merged into a single integrated assembly that moves as one unit relative to the shaft. This consolidation generates the necessary pulling force through the impact of the mass against the cap assembly without requiring separate force-generating components
Solution Approach 2:
The mass of the handle itself is utilized as the impacting element, eliminating the need for additional weights or force-generating mechanisms. The handle's own mass provides the necessary force when rapidly moved and impacted against the cap assembly
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
Effectively removes stuck drill bits from various materials, including concrete, by imparting a pulling force and vibrating action, making it easier to extract SDS type drill bits that are typically hard to remove.
Implementation Method 1
the mass is moveable from the second end to the first end to impact the cap assembly
Implementation Method 2
making it easier to extract SDS type drill bits that are typically hard to remove
Data Source
AI summary
A tool bit extractor for removing a drill bit stuck in a workpiece. The tool bit extractor includes a shaft with a first end, a second end opposite the first end, and a longitudinal axis extending between the first and second ends. The tool bit extractor also includes a cap assembly disposed at the first end of the shaft and a bit retention assembly disposed at the second end of the shaft. The bit retention assembly includes an opening configured to receive the drill bit. The tool bit extractor further includes a handle with a mass. The handle is moveable relative to the shaft between the first and second ends.