Folding Tailgate with Rail-Guided Guide Member
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Solution Overview
Problem
Conventional tailgates for automotive vehicles obstruct access to the storage bed when open, as they protrude rearward, limiting user access and visibility.
Innovation Solution
A folding tailgate design featuring a first and second wall portion connected via hinges, with a guide member constrained by a rail, allowing for a sliding and rotating motion that enables the tailgate to fold inward, providing unobstructed access to the bed while standing at the rear bumper.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a conventional tailgate is used that opens by rotating backward and downward, then the tailgate can be easily opened and closed, but the open tailgate protrudes rearward and obstructs access to the storage bed
Solution Approach 1:
The tailgate is divided into multiple segments or panels that can fold relative to each other. This segmentation allows the tailgate to collapse into a compact configuration that fits within the bed boundaries, eliminating the protruding obstacle problem while maintaining the hinged connection for easy operation.
Solution Approach 2:
Instead of rotating in a single arc that causes rearward protrusion, the tailgate employs a multi-stage folding mechanism that moves panels in different dimensions and planes. The panels fold sequentially along hinges to collapse the structure inward toward the bed, changing the motion trajectory from a simple arc to a complex multi-dimensional folding sequence.
2Device complexity
If a conventional tailgate opens in a fixed arc, then the mechanism is simple, but the user must stand a distance away from the bed to access cargo
Solution Approach 1:
Dividing the tailgate into multiple foldable panels creates a compact folded state that reduces the distance the user must stand from the bed, while each panel maintains simple hinged connections that preserve mechanical simplicity.
Solution Approach 2:
The folded tailgate panels nest within the bed boundaries, with each panel fitting into the space occupied by the vehicle or bed structure when folded, minimizing the external footprint and allowing user access closer to the bed.
3Ease of operation
If the tailgate rotates backward to open, then the opening motion is straightforward, but the rear facing edge protrudes rearward limiting access
Solution Approach 1:
Instead of rotating backward away from the bed, the tailgate panels fold inward toward the bed structure. This inverted motion direction causes the panels to collapse into the bed space rather than protruding outward, reversing the traditional opening trajectory to eliminate the protrusion problem.
Solution Approach 2:
The opening motion transitions from a simple backward rotation in one plane to a multi-dimensional folding sequence where panels move in multiple directions and planes, collapsing the structure inward rather than outward.
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 folding tailgate design enhances access to the vehicle bed by allowing users to stand closer to the rear without obstruction, maintaining an unobstructed view of the license plate and offering flexible opening modes, including lateral folding and downward rotation.
Implementation Method 1
a guide member attached to the first wall portion and configured to move along the rail in a manner that is constrained by the rail
Implementation Method 2
a first hinge attached to the second wall portion and movably attachable to the vehicle
Data Source
AI summary
An illustrative folding tailgate for an automotive vehicle includes a first wall portion and a second wall portion that are rotatably connected to one another. A first latch may be attached to the first wall portion and configured to engage with a complementary latch part at a first portion of a vehicle to lock the tailgate in a closed position. A guide member may be attached to the first wall portion and configured to move along a rail disposed at a rear of the automotive vehicle, the guide member configured to move along the rail in a manner constrained by the rail. A rotatable connection mechanism may be attached to the second wall portion and configured to attach to a second portion of a vehicle. The tailgate may be configured to open and close via folding movement of the first and second wall portions relative to one another.


