Tool Bit Extension Adapter With Dust-Sealed Locking Collar
Find Innovative SolutionsGenerate Solutions
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, leading to instability and limited drilling depth.
Innovation Solution
The extension adapter features a body with a bore to receive the tool bit, a retaining member, and a biasing member to secure the tool bit, along with a collar that moves between unlocked and locked positions to allow easy tool bit removal and secure engagement, ensuring the adapter's outer diameter to bore diameter ratio is ≤2.5 and outer diameter to retaining member ratio is ≤4.7, facilitating secure coupling and extended drilling capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the adapter's outer diameter is increased to accommodate larger tool bits, then the adapter can secure larger diameter tool bits, but the adapter becomes more bulky and less maneuverable
Solution Approach 1:
The adapter is divided into distinct functional segments: a collar portion for engagement, a body portion with bore for tool bit reception, and a retaining member system. This segmentation allows each part to be optimized independently - the collar can be sized for maneuverability while the bore is sized for tool bit compatibility
Solution Approach 2:
The solution moves from a single-dimensional approach (increasing outer diameter to fit larger bits) to a multi-dimensional approach by optimizing the bore diameter and length independently of the outer diameter, allowing the adapter to accommodate various tool bit sizes without increasing overall bulk
2Device complexity
If the adapter uses a simple design without retaining members, then the adapter structure is simpler, but the tool bit is not securely retained during operation
Solution Approach 1:
The retaining member is designed to be movable between engaged and disengaged positions, allowing dynamic control of tool bit retention. The biasing member provides automatic engagement force while allowing manual release when needed, creating a dynamic retention system that is reliable during operation but easy to release when required
Solution Approach 2:
The biasing member automatically provides the force needed to engage the retaining member with the tool bit groove without requiring additional actuators or complex mechanisms. The system self-regulates the retention force through the spring's mechanical properties
3Adaptability or versatility
If the adapter uses a large retaining member to secure oversized tool bits, then the adapter can hold larger tool bits, but the adapter's overall diameter increases beyond acceptable limits
Solution Approach 1:
The retaining member is nested within the adapter body and collar structure, allowing it to extend into the bore to engage tool bits of various sizes without increasing the adapter's outer diameter. The retaining member effectively nests within the existing structural envelope
4Reliability
If the adapter requires complex locking mechanisms to secure tool bits, then the tool bit is securely retained, but the tool bit removal and reinsertion process becomes time-consuming
Solution Approach 1:
The collar is designed to be movable between locked and unlocked positions, allowing the user to easily change the retention state. When the collar is in the unlocked position, the retaining member is disengaged and the tool bit can be freely removed or inserted. This dynamic design provides secure retention during operation while enabling quick tool bit changes when needed
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 adapter securely couples tool bits of varying diameters to power tools, enabling longer drilling depths without tool bit instability, and allows for easy removal and reinsertion, enhancing operational efficiency and versatility.
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, a collar, and a gasket. The body includes a front portion, a rear portion, and a flange separating the front portion from the rear portion. The front portion has a larger diameter than the rear portion. The body also includes an inner surface that defines a bore configured to receive a tool bit. The collar is moveable along the rear portion of the body between an unlocked position in which the tool bit is removable from the bore and a locked position in which the tool bit is secured to the body. The gasket is coupled to the rear portion of the body and abutting the flange. The gasket is compressed between the flange and the collar when the collar is in the locked position to block dust and debris from entering the bore.