Tailgate Subassembly Presetting for Gap and Seal Alignment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing tailgate assembly methods fail to ensure proper alignment and sealing interfaces during installation, leading to inconsistent gaps and functional issues.
Innovation Solution
The method involves presetting a tailgate frame subassembly and door subassembly relative to the vehicle structure, with the frame subassembly having a cargo bed access opening that is wider at the top than the bottom, and the door subassembly being pivotably connected to pivot about different axes, allowing for sagging into a design position post-installation to achieve desired gaps and sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional tailgate assembly methods are used, then installation is simpler, but alignment precision and sealing interface quality deteriorate
Solution Approach 1:
The patent applies preliminary action by presetting the frame subassembly and door subassembly at specific positions before final installation. The frame subassembly is preset such that its top surface is positioned higher than the design position, and the door subassembly is preset such that its bottom surface is positioned lower than the design position. This preliminary positioning compensates for expected sagging during operation, ensuring that after sagging occurs, the components settle into the correct design positions with proper alignment and sealing interfaces.
Solution Approach 2:
The patent applies preliminary anti-action by intentionally positioning components in opposite directions from their final design positions to counteract the expected sagging effect. The frame subassembly is positioned higher than it should ultimately be, while the door subassembly is positioned lower than it should ultimately be. This creates a compensatory effect where the sagging that naturally occurs during operation brings both components to their correct design positions, thereby preventing misalignment and sealing issues.
2Reliability
If components are installed at exact design positions, then alignment is precise initially, but sagging causes gap inconsistencies and functional issues
Solution Approach 1:
The patent applies preliminary action by pre-positioning the frame and door subassemblies at offset locations that anticipate future sagging. The frame subassembly is preset higher than its design position, and the door subassembly is preset lower than its design position. This ensures that when sagging occurs during normal operation, both components will settle into their correct design positions, maintaining consistent gaps and proper sealing interfaces throughout the product lifecycle.
Solution Approach 2:
The patent applies parameter changes by deliberately altering the initial positioning parameters of the frame and door subassemblies. Instead of installing at the exact design position, the frame subassembly is installed with its top surface higher than the design position, and the door subassembly is installed with its bottom surface lower than the design position. This parameter adjustment compensates for the expected dimensional changes due to sagging, ensuring long-term functional consistency.
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
This approach ensures a precise fit and finish, aligns sealing interfaces, and maintains functional requirements by allowing the tailgate assembly to sag into its intended design position, reducing gaps and improving latching and sealing efficiency.
Implementation Method 1
allowing for sagging into a design position post-installation to achieve desired gaps and sealing
Data Source
AI summary
The tailgate assembly method includes presetting a frame subassembly of a tailgate assembly relative to a vehicle structure; and presetting a door subassembly of the tailgate assembly relative to the frame subassembly. The frame subassembly can include a cargo bed access opening between a driver side section and a passenger side section. The door subassembly can be pivotable relative to the frame subassembly back-and-forth between a door open position and a door closed position. The door subassembly closes the cargo bed access opening when the door subassembly is in the door closed position.