Scooter Mount Assembly Anti-Rotation Pin Shear Mechanism
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Solution Overview
Problem
Conventional vehicle mounts for scooters lack secure attachment mechanisms, leading to potential dislodgment during accidents and vibration, as they rely on threaded connections that can loosen over time, posing safety risks to riders and others.
Innovation Solution
A device mounting assembly with anti-rotation pins that resist relative movement under normal conditions but shear under severe forces, allowing the assembly to 'give way' and prevent dislodgment of attached devices during accidents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If threaded connections are used to secure the mounting assembly to the scooter and portable device, then the assembly can be easily installed and adjusted, but the connections can loosen over time due to vibration and jarring
Solution Approach 1:
The patent transitions from static threaded connections to a dynamic system where the shaft can rotate within the lower pivot during normal operation, but is constrained by an anti-rotation pin. This dynamic approach allows easy adjustment while preventing loosening, as the anti-rotation pin engages to maintain connection stability under vibration and jarring conditions.
Solution Approach 2:
The anti-rotation pin acts as an intermediary element between the shaft and lower pivot. It provides the necessary constraint to prevent relative rotation and connection loosening, while allowing the shaft to be positioned and adjusted during installation. The pin mediates between the need for adjustability and the need for stable connection.
2Ease of operation
If threaded connections are used to secure the mounting assembly, then the device can be positioned for ready access, but the connections can become loose and cause the device to pivot to undesirable positions
Solution Approach 1:
The mounting assembly allows dynamic positioning of the portable device through rotation of the shaft within the lower pivot during installation, enabling optimal device placement for rider access. Once positioned, the anti-rotation pin engages to prevent any further movement, eliminating the harmful effect of connection loosening and device pivoting that could distract or injure the rider.
Solution Approach 2:
The anti-rotation pin serves as a safety intermediary that prevents the harmful consequence of connection failure. It ensures that the device remains securely positioned at the desired location without the risk of loosening and pivoting to dangerous positions that could affect rider safety.
3Reliability
If a secure threaded connection is used to prevent device dislodgment, then the device remains fixed during normal operation, but the device can become a projectile during accidents
Solution Approach 1:
The patent converts the potential harm of a secure connection becoming a projectile during accidents into a benefit by designing a controlled failure mechanism. The anti-rotation pin is designed to shear under extreme impact forces, allowing the device to detach safely during accidents rather than becoming a dangerous projectile. This transforms the harmful effect of strong fixation into a protective feature under extreme conditions.
Solution Approach 2:
The connection strength parameter is changed dynamically through the anti-rotation pin design. During normal operation, the pin provides strong fixation to prevent device dislodgment. Under extreme impact forces during accidents, the pin shears, changing the connection state from secure to detached, thereby preventing the projectile effect while maintaining reliable fixation during regular use.
4Reliability
If anti-rotation pins are used to prevent relative movement, then connection stability is improved, but the assembly may disengage under severe forces
Solution Approach 1:
The anti-rotation pin is designed with controlled strength to fail under severe impact forces. This converts the potential harm of connection failure into a beneficial safety feature, where the pin acts as a fuse that protects the scooter and rider by allowing device detachment during accidents, while providing reliable stability during normal operation.
Solution Approach 2:
The strength parameter of the connection is optimized through the anti-rotation pin design. The pin provides sufficient strength to prevent relative movement and maintain connection stability during normal vibration and jarring. However, the pin's strength is deliberately limited so that it shears under severe impact forces, changing the connection state from stable to detached to prevent greater harm.
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 solution effectively secures portable devices to scooters, preventing them from becoming projectiles during accidents and maintaining stability despite vibrations and jarring, thereby enhancing rider and public safety.
Implementation Method 1
a severable pin connection is provided at the location where the assembly is coupled to the vehicle and/or where the assembly is coupled to a portable device. These pin connections help resist relative movement at such locations under normal operating conditions of the vehicle, but may be severed in response to the application of a sufficient force to the assembly
Data Source
AI summary
A device mounting assembly particularly intended for connection to the mirror mount of a motorized scooter so that a portable device such as a cellular telephone may be positioned for ready access by the rider of the scooter includes a severable pin connection at the location where the assembly is coupled to the vehicle and/or to a portable device wherein the pin connections help resist relative movement at such locations under normal operating conditions of the vehicle but may be severed in response to the application of a sufficient force to the assembly to resist disengagement of the portable device from the vehicle.