Single Handle Riveting Gun Dynamic Torque Mechanism
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Solution Overview
Problem
Existing single handle pulling riveting guns require excessive force and energy due to constant torque during the riveting process, making them inefficient and difficult to use, especially when dealing with thin metal sheets and tubes.
Innovation Solution
A single handle pulling riveting gun design utilizing three pin shafts to connect the body, handle, and pulling rod, with a moving piece that increases torque and a riveting regulating mechanism allowing for adjustable riveting journey, reducing the effort required and enhancing usability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a single handle pulling riveting gun uses a pin shaft to connect the body and handle, then the structure is simple, but the torque remains constant requiring excessive force during riveting
Solution Approach 1:
The patent transforms the static pin shaft connection into a dynamic connection mechanism. The moving piece allows the second pin shaft to shift position during operation, changing the leverage arm length dynamically. This enables the torque to increase automatically as the riveting process progresses and resistance increases, reducing the force required by the user while maintaining operational simplicity.
Solution Approach 2:
The connection mechanism is divided into multiple components: first pin shaft, second pin shaft, moving piece, and third pin shaft. This segmentation allows each component to perform a specific function - the moving piece independently adjusts the leverage arm while the pin shafts provide stable connection points. The segmented design achieves variable torque without significantly increasing overall structural complexity.
2Power
If the riveting gun uses a fixed leverage arm, then the structure is simple, but the torque cannot increase with rising resistance
Solution Approach 1:
The leverage arm is transformed from a fixed structure to a dynamic one through the moving piece mechanism. As the handle moves during riveting, the second pin shaft shifts along the moving piece, automatically adjusting the leverage arm length. This dynamic adjustment ensures torque increases with resistance without requiring a complex variable leverage mechanism.
Solution Approach 2:
The moving piece mechanism automatically adjusts the leverage arm length based on the riveting process stage. The system self-regulates the torque output according to the resistance encountered, eliminating the need for external control or complex mechanical advantage systems. The mechanism serves itself by using the riveting motion to drive the leverage adjustment.
3Power
If the riveting gun is designed for high torque, then the riveting power is sufficient, but the device complexity increases
Solution Approach 1:
Instead of designing for maximum static torque, the patent uses dynamic torque multiplication during the riveting stroke. The moving piece mechanism provides leverage multiplication only when needed during the power stroke, maintaining low complexity during idle positions. This dynamic approach achieves high riveting power without requiring a permanently complex high-torque structure.
Solution Approach 2:
The high torque is generated periodically during the power stroke rather than being continuously available. The moving piece mechanism engages to provide leverage multiplication during the riveting action, then returns to a compact configuration during repositioning. This periodic action delivers sufficient riveting power while maintaining overall structural simplicity.
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 design reduces the effort and energy needed for riveting by increasing torque and allowing for adjustable riveting journey, making the tool more convenient and efficient for various thicknesses of metal sheets and tubes.
Implementation Method 1
a torsion spring, one end of the torsion spring contacts with the body or the first pin shaft other end of the torsion spring contacts with the handle
Implementation Method 2
the second pin shaft moves towards the pulling rod, makes torque increase
Data Source
AI summary
A single handle pulling riveting gun is disclosed. The single handle pulling riveting gun includes a body, a handle, a pulling rod, a grabbing mechanism, a riveting regulating mechanism, a first pin shaft, a second pin shaft, a third pin shaft and a moving piece. The riveting regulating mechanism cooperates with a front end of the body, the grabbing mechanism is set on a chamber of the riveting regulating mechanism; a rear end of the grabbing mechanism cooperates with the pulling rod.