Tailgate Hinge Assembly with Locking Retention Ring
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Solution Overview
Problem
Existing hinge assemblies for coupling tailgates to cargo beds are heavy, expensive, and time-consuming to install, and lack a secure mechanism to prevent accidental removal.
Innovation Solution
A hinge assembly comprising a bracket, a hinge pin, and a retention ring that can be locked or unlocked to secure the tailgate, featuring a lightweight and inexpensive design with a polymeric retention ring that allows easy installation and secure locking to prevent accidental removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional bracket is used to cover the hinge assembly to prevent tailgate removal, then the tailgate security is improved, but the weight, manufacturing cost, and installation time increase
Solution Approach 1:
The patent removes the traditional heavy bracket covering from the hinge assembly design. Instead, it uses a retention ring that integrates the security function directly into the hinge mechanism itself, eliminating the need for separate bracket components that add weight, cost, and installation complexity.
Solution Approach 2:
The retention ring merges the security locking function with the hinge assembly structure. The retention ring is directly integrated with the hinge pin and bracket, combining what were previously separate security and hinge functions into a unified component system.
2Reliability
If a traditional bracket is used to cover the hinge assembly, then the tailgate security is improved, but the manufacturing cost increases
Solution Approach 1:
The patent eliminates the need for manufacturing separate heavy bracket coverings. The retention ring is manufactured as a simpler, integrated component that provides the same security function at lower cost, reducing material and manufacturing complexity.
Solution Approach 2:
The retention ring appears to be designed as a simpler, potentially replaceable component that can be manufactured more economically than traditional brackets, allowing for cost-effective production and easier replacement if needed.
3Reliability
If a traditional bracket is used to cover the hinge assembly, then the tailgate security is improved, but the installation time increases
Solution Approach 1:
By removing the separate bracket covering component, the patent eliminates the installation steps required to attach and position additional bracket pieces. The retention ring integrates security functionality directly into the hinge assembly, reducing installation complexity and time.
4Reliability
If the retention ring is locked to prevent hinge pin disconnection, then the tailgate cannot be accidentally removed, but the hinge pin cannot be disconnected for servicing
Solution Approach 1:
The retention ring is designed with dynamic locking and unlocking capabilities. It can transition between a locked state that prevents accidental hinge pin disconnection and an unlocked state that allows intentional removal for servicing, providing adaptive security based on operational needs.
Solution Approach 2:
The retention ring appears to be designed for easy manual operation, allowing users to lock and unlock the hinge pin without requiring additional tools or complex mechanisms. The self-contained design enables straightforward servicing when needed while maintaining security during normal operation.
Data Source
AI summary
A vehicle includes a vehicle body, a tailgate and a hinge assembly. The tailgate is rotatable relative to the vehicle body between a closed position and an open position. The hinge assembly rotatably coupling the tailgate to the vehicle body. The hinge assembly includes a bracket, a hinge pin and a retention ring. The bracket is attached to a respective one of a plurality of side walls of the vehicle body. The hinge pin is rotatably fixed to a respective end of the tailgate and is removably connected to the bracket. The retention ring is rotatably coupled to the bracket between a locked state in which the hinge pin is prevented from being disconnected from the bracket and an unlocked state in which the hinge pin is permitted to be disconnected from the bracket.