Quick-Release Fastening System for Three-Wheeled Electric Vehicle
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Solution Overview
Problem
Current three-wheeled electric vehicles for the L2e-U class face challenges in efficiently swapping transport containers during operations, requiring a reliable and quick-release system to facilitate rapid exchange of containers for different cargo without compromising safety and regulatory compliance.
Innovation Solution
The integration of an electromechanical parking brake system and a quick-release fastening system with adjustable blocking members, controlled by a controller, ensures secure attachment and detachment of transport containers, preventing rear wheel rotation during parking brake mode and allowing for easy container exchange.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a traditional fastening system is used for transport containers, then the container can be securely attached, but the time required to swap containers increases
Solution Approach 1:
The fastening system is divided into separate locking elements (locking arms with cam mechanisms) that can independently engage with corresponding receptacles on the container. This segmentation allows for quicker engagement compared to a single complex fastening mechanism, directly addressing the need for faster container swapping while maintaining secure attachment.
Solution Approach 2:
The locking arms are pre-positioned in a ready state before container attachment. The cam mechanisms are designed to automatically engage with the container's locking receptacles upon placement, eliminating the need for manual adjustment or sequential fastening steps. This preliminary positioning significantly reduces the time required for container attachment while ensuring secure fastening.
2Loss of time
If a quick-release fastening system is implemented, then container swapping time is reduced, but the complexity of the fastening system increases
Solution Approach 1:
The fastening system incorporates self-locking cam mechanisms that automatically engage and lock into position when the container is placed on the vehicle. The cam arms are designed to self-position and self-lock without requiring manual intervention or complex control systems, achieving quick-release functionality while minimizing system complexity.
Solution Approach 2:
The system replaces complex multi-component mechanical fastening mechanisms with simpler cam-based locking arms. The cam mechanism provides rapid engagement and secure locking through a single rotational motion, eliminating the need for multiple bolts, nuts, or complex latching systems, thus reducing overall device complexity while maintaining quick-release capability.
3Reliability
If the parking brake is manually engaged during container swapping, then wheel rotation is prevented, but the operator's workload and potential for error increase
Solution Approach 1:
The control system continuously monitors the container attachment status through sensors that detect when the container is properly secured to the vehicle. This feedback is automatically transmitted to the controller, which then manages the parking brake engagement and release, eliminating the need for manual operator intervention and reducing potential for human error.
Solution Approach 2:
The electromechanical parking brake provides rapid and forceful wheel stabilization through electrically actuated braking force. This accelerated braking response ensures immediate wheel stabilization during container swapping operations, preventing any unintended vehicle movement while reducing the physical effort and time required compared to manual brake engagement.
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
This solution enables rapid and secure swapping of transport containers, ensuring safe operation and compliance with regulatory requirements by automatically engaging the parking brake when necessary, thus enhancing operational efficiency and safety.
Implementation Method 1
each rear wheel disc brake system which includes a hydraulically actuatable brake piston/-brake cylinder arrangement and which is additionally provided with an integrated electromechanical parking brake
Data Source
AI summary
A three-wheeled electric vehicle in accordance with EU vehicle classification L2e-U, which has two electric-motor-driven rear wheels, each of which is driven by one wheel-hub motor. A hydraulically actuatable rear-wheel disc-brake system is mounted on each rear wheel which brake system is also fitted with an integrated electromechanical parking brake, the activation of which shifts each rear wheel into a parking-brake mode in which wheel rotation is prevented. In a rear portion, the vehicle body forms a support structure on which an optionally present, exchangeable transport container can be supported and secured with the aid of a quick-release fastening system. The quick-release fastening system includes one or more connection device(s), wherein each connection device includes a bar that protrudes from a bottom wall of the transport container; and a locking device, which is permanently attached to the support structure, is fitted with a movable blocking element.