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

VSEngineering 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

Engineering Contradiction:
Improveease of opening and closingVSAvoidobstruction to access
Core Design Contradiction:
Ease of operationVSObject-generated harmful factors

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.

Inventive Principle:
Principle #1Segmentation

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.

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

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

Engineering Contradiction:
Improvemechanism simplicityVSAvoiddistance from bed for access
Core Design Contradiction:
Device complexityVSLength of moving object

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.

Inventive Principle:
Principle #1Segmentation

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.

Inventive Principle:
Principle #7Nested doll (Nesting)

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

Engineering Contradiction:
Improvestraightforward opening motionVSAvoidprotrusion shape
Core Design Contradiction:
Ease of operationVSShape

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.

Inventive Principle:
Principle #13The other way round (Inversion)

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.

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

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

Methodology Applied
Scientific EffectFriction: Friction

Implementation Method 2

a first hinge attached to the second wall portion and movably attachable to the vehicle

Methodology Applied
Scientific EffectHinge mechanism: Hinge

Data Source

PatentUS11643152B2Automotive vehicle with folding tailgate
Publication Date: 2023.05.09 RIVIAN HOLDINGS LLC
  • US11643152B2 patent drawing
  • US11643152B2 patent drawing
  • US11643152B2 patent drawing

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.