Insulated Adjustable Screwing Tool for Live Fasteners
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Solution Overview
Problem
Existing screwing tools struggle to efficiently engage with both live screws and nuts with different widths across flats, and there is a need for improved safety when handling live parts.
Innovation Solution
A screwing tool with a movable actuating element that allows for changing the distance between the jaws, featuring an electrically insulating handle and actuating element, enabling safe operation on live parts, and a spring-biased jaw mechanism for adjusting jaw distance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the handle is made of electrically conductive material for mechanical strength, then the structural integrity is improved, but the tool becomes unsafe for use on live screws or nuts due to electrical conductivity
Solution Approach 1:
The handle is divided into two distinct parts: an inner core made of electrically conductive material (aluminum alloy) for mechanical strength, and an outer casing made of electrically insulating material (plastic) for safety. This segmentation allows each material to fulfill its primary function without compromising the other.
Solution Approach 2:
The handle employs a composite structure combining aluminum alloy core with plastic outer casing. This composite design integrates the high strength-to-weight ratio of aluminum alloy with the electrical insulation properties of plastic, creating a handle that is both mechanically robust and electrically safe.
2Ease of manufacture
If the jaw distance is fixed for a specific screw size, then the manufacturing simplicity is improved, but the adaptability to different screw widths is reduced
Solution Approach 1:
The jaw distance is made dynamically adjustable through a slide mechanism. The movable jaw can be positioned at multiple discrete locations along the handle, allowing the tool to adapt to different screw widths. This dynamic adjustment capability transforms a static tool into a versatile multi-purpose device.
Solution Approach 2:
The slide mechanism incorporates a spring element that automatically returns the movable jaw to its initial position after adjustment. This self-service feature eliminates the need for manual resetting and simplifies the adjustment process, making the tool easy to operate while maintaining manufacturing simplicity.
3Adaptability or versatility
If the head is articulated on the handle for pivoting motion to adjust jaw distance, then the adaptability to different screw sizes is improved, but the device complexity increases due to additional articulation mechanisms
Solution Approach 1:
The articulation mechanism is merged with the slide mechanism. The movable jaw is integrated into the slide assembly, combining the pivoting motion for jaw separation with the linear sliding motion for position adjustment. This merging reduces the number of independent mechanisms and simplifies the overall device structure.
Solution Approach 2:
The slide mechanism serves multiple functions: it adjusts the jaw distance for different screw widths, provides the pivoting motion for jaw separation, and incorporates the spring-based return mechanism. This multi-functionality reduces the need for separate components and simplifies the overall device 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 safe and efficient engagement with both live screws and nuts of varying widths, ensuring secure grip and preventing slippage during use on live parts.
Implementation Method 1
A spring force is applied to the movable jaw by means of a spring element in the direction of the fixed jaw. Accompanied by this, the spring element biases the head into a first pivot position
Data Source
AI summary
A screwing tool includes a head, which has a fixed jaw and a movable jaw and which is fastened to a handle so as to be pivotable about a pivot axis against a restoring force from a small distance position of the two jaws into a large distance position of the two jaws. In order to be able to touch live parts by means of a screwing tool of this type, the handle has an insulating casing and an actuating element is provided, which can be displaced relative with respect to the handle and which, during its displacement, displaces the head from the small distance position into the large distance position.