Quick-Release Bit Adapter with Segmented Retention
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Solution Overview
Problem
Existing bit adapters are inconvenient and unsafe due to laborious bit removal processes, especially for small bits, which require manual grip and force, and can lead to accidents when the chuck gets stuck in small holes, compromising safety and usability.
Innovation Solution
A quick-release bit adapter with a non-circular driving hole and a resilient positioning member that engages with the bit's cuts, allowing easy engagement and disengagement through a sliding mechanism, preventing gravitational dislodgment and enabling easy removal with enhanced safety features.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a magnet is mounted in the coupling hole to prevent bit disengagement, then the bit is retained securely, but the user must overcome strong magnetic attraction by tightly gripping the bit with finger tips, which is laborious and dangerous
Solution Approach 1:
The bit retention mechanism is segmented into two independent functions: a magnet for secure retention during operation, and a separate releasing device with a positioning member for controlled removal. This segmentation allows the bit to be held firmly by magnetic force while enabling easy removal through the releasing device without requiring the user to overcome strong magnetic attraction directly.
Solution Approach 2:
The releasing device acts as an intermediary mechanism between the user and the magnetically retained bit. By using the releasing device to disengage the positioning member from the bit cuts, the user indirectly overcomes the magnetic retention force without directly gripping and pulling the bit against strong magnetic attraction, thereby improving safety and ease of operation.
2Reliability
If the chuck is mounted around the front end of the transmission shaft to clamp the bit, then the bit is securely held, but the overall outer diameter increases, preventing the shaft from reaching small holes
Solution Approach 1:
The chuck is extracted from the transmission shaft design. Instead of mounting the chuck around the front end of the shaft, the bit clamping function is achieved through the adapter body with the driving hole and positioning member system. This extraction removes the bulky chuck structure, reducing the overall outer diameter and allowing the shaft to reach small holes while maintaining secure bit clamping through the adapter's internal mechanism.
3Device complexity
If the front end of the bit exposed outside the coupling hole is kept short to maintain compact design, then the overall size is reduced, but the user cannot grip the bit effectively for removal
Solution Approach 1:
The releasing device serves as an intermediary that eliminates the need for direct user gripping of the bit. The positioning member engages with the bit cuts and can be disengaged by operating the releasing device, which provides a mechanical advantage and allows bit removal without requiring the user to grip the short exposed bit end. This intermediary mechanism resolves the conflict between compact design and ease of bit removal.
4Ease of operation
If the user's hand is stained with oil reducing friction between finger tips and bit, then gripping becomes difficult, but using pliers to clamp and remove the bit causes trouble and is inconvenient
Solution Approach 1:
The releasing device acts as a dedicated intermediary tool for bit removal that replaces the need for both direct finger gripping and external pliers. By engaging the positioning member with the bit cuts and using the releasing device's mechanical action to disengage it, the system provides a reliable removal mechanism that works regardless of hand condition (oily or clean) and eliminates the need for separate pliers or other external tools.
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
Facilitates quick, safe, and easy bit replacement without the need for pliers, ensuring the adapter can fit into small spaces and maintain high-torque transmission while preventing bit fallouts, thus enhancing user safety and convenience.
Implementation Method 1
A resilient positioning member is mounted in the driving section of the body and has at least one positioning section adapted to be releasably engaged in at least one of a plurality of cuts in an outer periphery of the bit
Implementation Method 2
a magnet is mounted in the coupling hole. The chuck is moved rearward to disengage from the bit when it is desired to remove the bit. In this case, the bit is still attracted by the magnet, preventing the bit from being disengaged from the coupling hole under the action of gravity
Data Source
AI summary
A quick-release bit adapter includes a body having a driving hole extending from a driving section towards a connecting section of the body. The driving section includes a sliding hole extending at a non-parallel angle to and in communication with the driving hole. A resilient positioning member is mounted in the driving section. A releasing device is slideably mounted in the sliding hole. When the releasing device is in a first position, the resilient positioning member is engaged in cuts in an outer periphery of a bit in an engagement position received in the driving hole. When the releasing device is moved to a second position, the bit is disengaged from the resilient positioning member to allow easy removal of the bit.