Hydraulic Hinge Check Structure for Vehicle Door Retention
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing vehicle door check structures are not effective in retaining the door in fully open positions, especially on hills where gravity can cause the door to close due to insufficient holding force.
Innovation Solution
A hydraulic hinge check structure with a pivot shaft, paddle, and case, where the pivot shaft is supported within a fluid chamber filled with hydraulic fluid, providing resistance to pivoting movement through fluid pressure equilibrium, ensuring the door can only be moved out of the open position by a predetermined force.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a traditional check structure is used to retain the door in open positions, then the door can be held in predetermined positions, but the holding force is insufficient to overcome gravity when the vehicle is parked on a hill
Solution Approach 1:
The patent employs a hydraulic check structure where hydraulic fluid is contained within a sealed chamber. The hydraulic fluid generates substantial holding force through pressure equilibrium, effectively overcoming gravity when the vehicle is parked on a hill. The hydraulic system provides reliable door retention by creating a balanced force system that can be disrupted only by intentional operator action.
Solution Approach 2:
The patent changes the physical state and pressure parameters of the hydraulic fluid to generate sufficient holding force. By controlling the hydraulic fluid pressure and volume within the sealed chamber, the system achieves the necessary force magnitude to counteract gravitational effects on inclined surfaces, transforming the original insufficient mechanical check structure into a reliable hydraulic retention system.
2Reliability
If a hydraulic check structure is implemented to provide sufficient holding force, then the door can be retained reliably on hills, but the device complexity increases
Solution Approach 1:
The patent merges the check structure functionality directly into the hinge assembly, combining the hydraulic retention mechanism with the existing hinge components. This integration approach reduces overall device complexity by eliminating separate check structure assemblies while maintaining reliable door retention through the hydraulic fluid pressure system within the unified hinge structure.
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 hydraulic hinge check structure effectively retains the vehicle door in any open position, including fully open, by providing a consistent resistance force that overcomes gravity and external influences, ensuring the door remains open until intentionally closed.
Implementation Method 1
The fluid chamber is filled with hydraulic fluid. Pivoting movement of the pivot shaft forces the hydraulic fluid to move through the aperture from one of the first side surface and the second side surface of the paddle to the other of the first side surface and the second side surface of the paddle. With the pivot shaft being stationary relative to the fluid chamber, equilibrium of fluid pressure of the hydraulic fluid at the first side surface and the second side surface of the paddle imparts a resistance to pivoting movement of the pivot shaft relative to the fluid chamber.
Data Source
AI summary
A hinge hydraulic infinite check structure includes a paddle having at least one hydraulic aperture is rigidly fixed to a shaft. The pivot shaft is supported for pivoting movement within a case. The case includes a wall portion rigidly fixed to a cylindrically shaped inner surface and extends radially inward to the shaft. Pivoting movement of the pivot shaft forces the hydraulic fluid to move through the aperture from a first side to a second side of the paddle generating movement resistance. With the pivot shaft being stationary relative to the fluid chamber, equilibrium of fluid pressure of the hydraulic fluid at the first side and the second side of the paddle imparts a resistance to pivoting movement of the pivot shaft relative to the fluid chamber.