Tailgate-Integrated Step Mechanism for Unobstructed Cargo Access
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Solution Overview
Problem
Existing step mechanisms for vehicles with drop-down tailgates interfere with the tailgate operation, making it difficult for users to ingress and egress from the luggage compartment.
Innovation Solution
A vehicle tailgate apparatus with a deployable step mechanism that integrates into the tailgate, allowing it to extend when opened, featuring a link mechanism, gas spring, and cover system for easy deployment and stowage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a traditional step mechanism is provided on the vehicle body adjacent to the tailgate, then users can be assisted in ingress and egress, but the step mechanism interferes with the drop-down tailgate operation
Solution Approach 1:
The step mechanism is designed to dynamically change its position and configuration based on the tailgate state. When the tailgate is closed, the step mechanism is deployed to assist user ingress/egress. When the tailgate is opened horizontally, the step mechanism automatically retracts or adjusts to avoid interference with the tailgate's movement path.
Solution Approach 2:
The step mechanism is integrated within the tailgate structure itself, with the step components nested inside the tailgate body when not in use. This allows the step mechanism to be stored within the tailgate's internal space, eliminating external interference with tailgate operation while maintaining accessibility when needed.
2Adaptability or versatility
If a step mechanism is integrated into the tailgate, then the step mechanism does not interfere with tailgate operation, but the device complexity increases
Solution Approach 1:
The step mechanism and tailgate are merged into a single integrated assembly. The step mechanism shares structural components with the tailgate, such as using the tailgate's hinge mechanism for step deployment and utilizing the tailgate's internal cavity for step storage. This integration reduces the need for separate control systems and structural frameworks.
Solution Approach 2:
The tailgate structure serves multiple functions: it acts as both the closure for the luggage compartment and as the housing for the step mechanism. The same hinge system that enables tailgate opening/closing also controls step deployment/retraction. This multi-functionality reduces the number of separate components and simplifies the overall device architecture.
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
Facilitates easier ingress and egress into and out of the luggage compartment by providing a deployable step mechanism that does not interfere with the tailgate operation.
Implementation Method 1
The link mechanism may further include a gas spring providing a biasing force allowing the step body to be biased to the deployed position
Data Source
AI summary
A vehicle tailgate apparatus can including a tailgate configured to move between an open position and a closed position through a pair of bottom hinges at a rear end of a luggage compartment of a vehicle body, and a step mechanism configured to move between a stowed position in which the step mechanism is stowed in the tailgate and a deployed position in which the step mechanism is deployed from the tailgate.