Split Threaded Nut Joint for Fast Assembly on Long Screws
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Solution Overview
Problem
Conventional screw-fastening methods for joining nuts and screws are time and labor-consuming, especially with longer screws, as they require threading engagement from one end to a designated place.
Innovation Solution
A joint device comprising two bodies with internal and external threads and protrusions that can be folded around the screw, allowing the nut to be quickly secured without extensive threading, and featuring engaging hooks and cutting edges for easy disengagement and tool-assisted unscrewing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional threading engagement method is used to join nut and screw, then the connection is reliable, but the operation is time and labor consuming especially with long screws
Solution Approach 1:
The device segments the threading engagement process into two independent parts: the screw threads engage with the first body's internal threads, and the nut threads engage with the second body's external threads. The first and second bodies are connected via engaging portions, creating a modular system that eliminates the need for sequential threading along the entire screw length.
Solution Approach 2:
The first and second bodies act as intermediary components between the screw and the nut. Instead of directly threading the nut onto the screw, the intermediaries provide alternative threading paths that are independent of the screw length, thereby reducing the time-consuming threading operation.
2Ease of operation
If the nut is threaded from one end to a designated place on a long screw, then the connection is secure, but the operation becomes labor consuming
Solution Approach 1:
The threading path is segmented into two independent short paths: one from the screw to the first body, and another from the nut to the second body. This segmentation simplifies the operation by eliminating the need to thread along the entire length of a long screw, making the process easier and less labor-intensive.
Solution Approach 2:
The device introduces a new dimensional aspect by adding the first and second bodies that extend perpendicular to the screw axis. This allows the threading engagement to occur in a different spatial dimension, bypassing the constraint of threading along the screw length and simplifying the operational path.
3Productivity
If a joint device with two bodies is added between screw and nut, then assembly speed is improved, but the device structure becomes more complex
Solution Approach 1:
The first and second bodies are merged into a single integral structure, reducing the number of separate components. This merging maintains the functional benefits of the joint device while simplifying the overall structure and reducing assembly complexity.
Solution Approach 2:
The first and second bodies serve multiple functions simultaneously: they provide threading engagement surfaces for both the screw and the nut, act as structural connectors, and incorporate engaging portions for rapid connection and disconnection. This multi-functionality reduces the need for additional specialized components, thereby managing structural complexity.
4Ease of manufacture
If the first body and second body are made as integral structure, then manufacturing cost is reduced, but the flexibility in assembly may be limited
Solution Approach 1:
While the first and second bodies are integrally manufactured to reduce costs, the device maintains functional segmentation through the engaging portions that connect the two bodies to the screw and nut respectively. This allows the integral structure to benefit from simplified manufacturing while the modular connection interfaces preserve assembly flexibility and adaptability.
Data Source
AI summary
A joint device for screw and nut includes a first body and a second body. The first body is provided with a plurality of first internal threads, of first external threads, and a first protrusion. The first protrusion is extended with a first engaging portion. The second body is provided with a plurality of second internal threads, of second external threads, and a second protrusion. The second protrusion is extended with a second engaging portion, such that the first protrusion and the second protrusion can be engaged with each other. When in a joining status, the first engaging portion and the second engaging portion are engaged with each other, such that the first body and the second body are folded up and around the screw. The nut can therefore screw up the first body and the second body correspondingly.