Autofeed Screwdriver Twist Collar for Secure Screw Gun Latching
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Solution Overview
Problem
Existing manual-feed screwdriving tools lack the ability to be easily converted into automatic-feed screwdriving tools without requiring complex mechanical adaptations or specialized components.
Innovation Solution
An autofeed attachment that utilizes a rotatable collar with inclined ramps to force movable plates against a recessed channel and protruding flange on a manual-feed screw gun, creating a secure locking mechanism through a twist collar mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a manual-feed screw gun is converted to an automatic-feed screw gun using an attachment, then the functionality and productivity are improved, but the device complexity increases due to the need for locking mechanisms and movable plates
Solution Approach 1:
The attachment is divided into separate functional components: a collar assembly, movable plates, retainers, and a manual-feed screw gun. This segmentation allows each component to perform its specific function independently while maintaining overall system simplicity. The movable plates are separate from the collar but controlled by it, enabling modular assembly and disassembly.
Solution Approach 2:
The movable plates are positioned within the collar assembly, with the retainers nested between the plates and the collar. This nested arrangement allows compact packaging of multiple functional elements within a limited space, reducing the overall footprint of the attachment while maintaining all necessary locking and retention functions.
2Reliability
If a secure locking mechanism is implemented using movable plates and retainers, then the reliability of the attachment is improved, but the ease of operation deteriorates due to the complexity of assembly and disassembly
Solution Approach 1:
The movable plates transition between fixed and movable states during operation. During installation, the plates are movable to allow engagement with the manual-feed screw gun features. Once locked, the plates become fixed relative to the collar, providing secure retention. This dynamic behavior enables simple operation while maintaining reliable locking.
Solution Approach 2:
The coil springs automatically push the movable plates against the retainers, creating self-latching action without requiring additional fastening steps. When the collar is rotated during installation, the ramps automatically force the plates into their locked position against the screw gun features. This self-service mechanism eliminates the need for separate locking operations, simplifying user interaction while ensuring secure attachment.
3Manufacturing precision
If ramps are used to force movable plates against the screw gun features, then the manufacturing precision is improved through self-aligning action, but the device complexity increases due to the inclined surface geometry
Solution Approach 1:
The collar and movable plates feature curved or rounded contact surfaces that facilitate smooth rotational movement and self-aligning action. The ramps are formed as inclined curved surfaces within the collar, allowing the movable plates to follow a natural arc during rotation. This curvature simplifies the geometry compared to sharp angular features while maintaining precise alignment through the self-aligning nature of the curved contact surfaces.
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 attachment effectively converts a manual-feed screw gun into an automatic-feed screw gun, providing a secure and reliable locking mechanism that allows for easy installation and removal without complex adaptations.
Implementation Method 1
small coil springs that are mounted between the two movable plates will force the movable plates apart from one another
Implementation Method 2
a first ramp that forces a first contact surface of the movable plate inward when the rotatable collar is twisted
Data Source
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AI summary
An autofeed attachment designed for mounting to a manual-feed screwgun that has a recessed channel on the exterior surface near a protruding flange. The autofeed attachment has at least one movable plate that is forced inward by a ramp structure on the interior surface of a rotatable collar. When the collar is rotated in a predetermined direction, the ramp surface acts to force the movable plate toward the interior, until that movable plate comes into contact into the recessed channel on the screwgun. Once that has occurred, the autofeed attachment will now be locked into place into that recessed channel and behind a protruding flange of the screwgun. The movable plate(s) is positioned between two retainer structures that are spaced-apart from one another, and create a gap through with the at least one movable plate can move during the locking, and later unlocking operations, by twisting the rotatable collar.