Hinge System for Removable Vehicle Roof Panels
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Solution Overview
Problem
Existing removable rooftop panels for Jeep vehicles require full removal and storage, which is difficult, especially for users of smaller stature, and leaves the vehicle interior vulnerable to weather and theft.
Innovation Solution
A system with hinges that allows the removable roof panels to be folded up and back over a fixed base unit, enabling partial or full opening without complete removal, with constant torque hinges for stability and latches for secure locking in open positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If removable roof panels are fully removed and stored, then the open air experience is improved, but the ease of operation deteriorates (especially for users of smaller stature) and the vehicle interior becomes vulnerable to weather and theft
Solution Approach 1:
The hardtop is divided into modular components: a fixed base unit and removable roof panels that can be independently manipulated. The hinge system segments the opening operation into two distinct phases (partial opening from inside, then folding back from outside), allowing different users to contribute to the opening process based on their stature and ability.
Solution Approach 2:
The hinge system introduces dynamic movement capability to the roof panels, enabling them to transition between closed, partially open, and fully open positions. The constant torque mechanism provides dynamic support throughout the range of motion, maintaining control and stability at any position rather than requiring full removal or fixed positioning only.
2Reliability
If conventional hardtops are used, then the protection against weather is improved, but the ease of operation deteriorates (difficult to remove and store)
Solution Approach 1:
The hardtop system is segmented into a permanent base unit that remains attached to the vehicle and provides continuous weather protection, and removable panels that can be easily manipulated. This segmentation allows the protective function to be maintained while the operational burden is reduced, as users only need to manipulate the lighter panels rather than the entire hardtop assembly.
Solution Approach 2:
The hinge system acts as an intermediary mechanism between the roof panels and the base unit, providing a controlled transition state. This intermediary system enables the panels to be partially opened and held in intermediate positions, serving as a mediator between the closed protected state and the fully open state, eliminating the need for complete removal.
3Ease of operation
If removable roof panels are designed to be fully removed, then the open air experience is improved, but the device complexity increases (requiring removal and storage systems)
Solution Approach 1:
The hinge system merges the functions of attachment, partial opening, and securing into a single integrated mechanism. By combining these functions, the system eliminates the need for separate removal and storage operations, reducing overall device complexity while maintaining full open air access capability.
Solution Approach 2:
The hinge system performs multiple functions: it attaches the panels to the base unit, enables partial opening for interior access, supports intermediate positions with constant torque, and allows secure closing. This multi-functionality replaces what would otherwise require multiple separate systems (attachment mechanisms, support structures, storage systems), thereby reducing overall complexity.
4Stability of the object's composition
If constant torque hinges are used, then the stability in partially opened position is improved, but the device complexity increases
Solution Approach 1:
The constant torque hinge is a self-regulating mechanism that automatically provides the necessary holding force at any position within its range of motion. It self-adjusts to maintain the panel in any desired position without requiring external support structures, active control systems, or additional locking mechanisms, thereby providing stability without proportional increases in overall system 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
Enables users to open and close removable roof panels without full removal, providing weather protection and security, while allowing full removal if needed, and accommodating users of varying heights with a two-step process.
Implementation Method 1
The hinges may be capable of supporting a partially opened position to prevent the panels from falling and slamming shut while opening. Such constant torque hinges may also aid those who need to open the roof panels using a two-step process.
Implementation Method 2
the present invention further provides a system with hinges that attach the rear edge of each removable roof panel to the base unit, thereby allowing the roof panels to be folded up and back over a fixed roof panel of the base unit
Data Source
AI summary
A hinge system for a vehicle hardtop having a system with hinges (1) that allow a user to open and close a set of removable rigid rooftop panels (5, 6) for a Jeep or other sport utility vehicle without being required to fully remove and store the rigid roof panels. The hinges may be capable of supporting a partially opened position to prevent the panels from falling and slamming shut while opening.