Quick-Coupling Draw Rod Joint for Faster Panel Straightening
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Solution Overview
Problem
Existing manual panel straightening devices for vehicle body dents often suffer from threading damage due to substantial drawing forces and require time-consuming screwed fittings, which are cumbersome and prone to errors.
Innovation Solution
A panel straightening device employing a reversible and removable sliding pivot connection system between the draw rod and drawing tool, allowing for quick setup without tools, featuring a cylindrical pin and end piece attachment mechanism with a locking/unlocking ring for secure engagement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a screwed connection is used to attach the drawing tool to the draw rod, then the connection is secure and reliable, but the setup process becomes time-consuming and the threading may be damaged under substantial drawing forces
Solution Approach 1:
The connection system is divided into separate components: a draw rod with a pin and a drawing tool with an end piece. This segmentation allows for quick assembly by simply inserting the pin into the end piece without threading operations, eliminating the time-consuming aspect while maintaining connection integrity through the pin's structural design
Solution Approach 2:
The connection system transitions from a static screwed joint to a dynamic quick-coupling mechanism. The pin-based system allows for rapid engagement and disengagement, enabling the drawing tool to be quickly attached and removed from the draw rod without damaging the threading, thus resolving both the time consumption and potential threading damage issues
2Strength
If a screwed connection is used to attach the drawing tool to the draw rod, then the connection can be secured, but the threading may be damaged under substantial drawing forces
Solution Approach 1:
The threading element is extracted from the connection system. Instead of using threaded joints that are susceptible to damage, the invention employs a pin-based connection where the pin is inserted into the end piece. This removes the vulnerable threading component entirely, preventing threading damage while maintaining sufficient connection strength for withstanding drawing forces
Solution Approach 2:
The pin-based connection system is designed to absorb and distribute the substantial drawing forces before they can cause damage. The pin's structural design and the的配合 with the end piece create a robust joint that cushions against the harmful forces, preventing the threading damage that would occur with conventional screwed connections
3Reliability
If a screwed connection is used to attach the drawing tool to the draw rod, then the connection is secure, but the fitting process becomes cumbersome and prone to errors
Solution Approach 1:
The connection is segmented into a pin and an end piece, simplifying the fitting process. The pin is designed to be easily inserted into the end piece without requiring threading operations, making the process intuitive and error-free. This segmentation transforms a complex screwed fitting operation into a simple insertion action that is both secure and easy to perform
Solution Approach 2:
The pin-based connection system is self-aligning and self-securing. The pin's geometry and the end piece's receptacle are designed to work together automatically, eliminating the need for precise threading alignment and manual tightening operations. This self-service characteristic makes the fitting process straightforward and reduces the likelihood of operator errors
Data Source
AI summary
A panel straightening device including a bar supporting a draw rod movably mounted on the bar and an element for controlling the movement of the draw rod in relation to the bar. The draw rod includes at one of the ends thereof a first attachment feature to a tool for drawing the panel to be straightened. The drawing tool includes a second attachment feature, capable of cooperating with the first attachment feature of the draw rod. The first attachment features is connected to the second attachment feature by a sliding pivot connection.