Tool Bit Extension Adapter With Locking Collar for Deep Boring
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Solution Overview
Problem
Existing extension adapters for tool bits do not effectively secure tool bits to power tools, particularly in applications where the tool bit diameter exceeds the adapter's outer diameter, limiting the length of holes that can be bored.
Innovation Solution
The extension adapter features a body with a bore to receive the tool bit, a retaining member, and a collar that moves between unlocked and locked positions, allowing secure attachment of the tool bit to the adapter, with a maximum outer diameter to bore diameter ratio of 2.5 or less, ensuring the tool bit can be locked in place and easily removed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the adapter's outer diameter is increased to accommodate larger tool bits, then the tool bit can be secured, but the adapter becomes stuck in the workpiece and cannot be removed
Solution Approach 1:
The adapter is divided into a body portion and a removable collar portion. The collar can be detached from the body, allowing the collar (with the tool bit) to be removed from the workpiece while the body remains. This segmentation resolves the contradiction by enabling secure holding during operation while facilitating easy removal after completion.
2Reliability
If a retaining mechanism is added to secure the tool bit, then the tool bit is held firmly, but the device complexity increases
Solution Approach 1:
The collar is designed to be movable between a first position (engaging the tool bit groove for secure retention) and a second position (disengaged for tool bit removal). This dynamic positioning allows the same structure to provide both firm retention during operation and easy release after operation, resolving the contradiction between reliability and ease of operation without adding excessive 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
Enables the use of tool bits with diameters greater than the adapter's outer diameter for extended drilling operations, allowing for longer holes to be bored without the adapter becoming stuck in the workpiece, and facilitates easy removal of the tool bit after use.
Implementation Method 1
a biasing member surrounding a portion of the body. The biasing member includes a protrusion received within the aperture to bias the retaining member into a first position
Data Source
AI summary
An extension adapter includes a body having a bore. The bore is configured to receive a tool bit. The extension adapter includes a retaining member received within an aperture of the body and a biasing member coupled to the body. The biasing member includes a protrusion received within the aperture to bias the retaining member into a first position in which a portion of the retaining member extends into the bore. The extension adapter includes a collar moveable between an unlocked position and a locked position. The unlocked position is configured to allow the tool bit to be removed from the bore. While the collar is maintained in the locked position, the body is configured to slidably receive the tool bit such that the portion of the retaining member is received in a groove of the tool bit to secure the tool bit to the body.