Truck Tailgate Pivot Structure for Low-Step Access and Anti-Jamming
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Solution Overview
Problem
Conventional tailgates on trucks are prone to jamming and difficulty in operation due to particulate matter accumulation, and their design restricts access, making it hard for users to step onto the bed, especially when carrying high loads or particulate materials.
Innovation Solution
A tailgate design featuring a seal portion and pivot structures that allow rotation about a horizontal axis, with an embedded support rack and pop-up mini-gate to reduce particulate matter accumulation and provide a lower step height, incorporating a thrust bearing and alignment structure to prevent deformation and facilitate easy operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional hinges are used to attach the tailgate, then the tailgate can rotate between vertical and horizontal positions, but the hinges accumulate particulate matter and jam, reducing reliability
Solution Approach 1:
The patent removes the traditional hinge mechanism entirely and replaces it with a pivot assembly that rotates about a horizontal axis positioned below the bed. This extraction eliminates the harmful hinge-jamming effect while preserving the tailgate's rotational functionality between vertical and horizontal positions.
Solution Approach 2:
The patent introduces a seal portion as an intermediary element between the tailgate and the bed. This seal prevents particulate matter from reaching the pivot assembly while allowing the tailgate to rotate, thus mediating between the need for rotation and the need to prevent contamination.
2Ease of operation
If complex hinge mechanisms are added to assist stepping onto the bed, then access is improved, but device complexity increases
Solution Approach 1:
The patent eliminates complex hinge mechanisms entirely by using a simple pivot assembly with a horizontal axis. This extraction of complexity achieves the stepping assistance function through basic rotational mechanics rather than complicated multi-component hinge systems.
Solution Approach 2:
Instead of adding complexity to hinges to assist stepping, the patent inverts the approach by positioning the rotation axis below the bed and using the tailgate's own weight and geometry to provide the stepping function. This simplifies the mechanism while achieving the same goal.
3Reliability
If the tailgate rotates about a horizontal axis below the bed, then particulate matter accumulation is reduced, but the pivot structure becomes more complex
Solution Approach 1:
The seal portion acts as an intermediary that protects the pivot assembly from particulate matter. This simple sealing element prevents contamination without requiring a complex enclosed pivot housing, maintaining structural simplicity while achieving reliability.
Solution Approach 2:
The patent changes the rotation axis from a vertical hinge (traditional) to a horizontal axis positioned below the bed. This dimensional change relocates the pivot away from the particulate-prone zone, reducing contamination risk without adding mechanical complexity.
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 design effectively reduces particulate matter accumulation, prevents jamming, and allows for easier access to the truck bed by lowering the tailgate height, enhancing usability and reducing complexity compared to traditional hinge mechanisms.
Implementation Method 1
a thrust bearing and alignment structure to prevent deformation and facilitate easy operation
Implementation Method 2
A tailgate design featuring a seal portion and pivot structures that allow rotation about a horizontal axis
Data Source
AI summary
Systems and methods are disclosed for providing a tailgate for a truck that rests at an intermediate level between the ground and the truck bed when the tailgate is disposed in an open/primarily-horizontal position. The inventive tailgate may be hinged below and forward of the rear edge of the bed level such that when opened, it rests at a level below the deck. The tailgate may be hinged with bearings that are constructed to and positioned to reduce the amount of hinge clogging. The inventive tailgate may include a pop-up mini-gate that raises to substantially the same level as the bed for use with transportation of oversized objects. The inventive tailgate may include a foldable or rotatable support structure that may be used to support items that extend beyond the end of the horizontal tailgate. The inventive tailgate may be sealed around three sides of the cargo box to prevent loss of particulate or granular cargo.