Door Hinge Cam Mechanism Alignment Control
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Solution Overview
Problem
Conventional closing or damping hinges for reinforced doors lack control over door movement, leading to safety issues due to misalignment and high friction, which results in frequent wear and maintenance needs, especially when supporting heavy doors.
Innovation Solution
A hinge design with a pivot and cam mechanism, combined with an elastic counteracting element, allows controlled door movement by providing braking force during opening and maintaining alignment, reducing friction through anti-friction elements and enabling easy adjustment and installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional purely mechanical hinges are used for reinforced doors, then the construction is simple, but the door movement cannot be controlled leading to safety issues and misalignment
Solution Approach 1:
The patent combines multiple functions into a single integrated hinge mechanism: the pivot element provides rotation, the cam element provides controlled movement and positioning, and the elastic element provides counteracting force. This merging of functions achieves reliable door movement control while maintaining relatively simple construction.
Solution Approach 2:
The hinge transitions from a static purely mechanical connection to a dynamic system with controlled movement phases. The cam mechanism enables the door to move through different phases: free movement, controlled braking, and precise positioning, thereby achieving reliability through dynamic control rather than static rigidity.
2Force
If conventional hinges support heavy reinforced doors, then the door weight is supported, but high friction causes frequent wear and breakage requiring continuing maintenance
Solution Approach 1:
The patent replaces the conventional high-friction mechanical contact system with a rolling element bearing system. The bearing substitutes direct sliding friction between the pivot and support with rolling friction, dramatically reducing wear while maintaining the ability to support heavy door weights.
Solution Approach 2:
The elastic counteracting element acts as an intermediary that distributes and moderates the forces between the heavy door and the hinge mechanism. This intermediary element reduces peak loads and frictional forces, thereby reducing wear on contact surfaces and maintenance requirements.
3Ease of operation
If conventional hinges are used for reinforced doors, then the door can be opened and closed, but the hinge loses initial position and misaligns over time
Solution Approach 1:
The cam mechanism provides a form of mechanical feedback that actively maintains the door in the correct closed position. The cam profile is designed to engage with the door at specific angles, providing automatic positioning feedback that corrects any drift or misalignment, thereby maintaining position stability while allowing easy operation.
Solution Approach 2:
The hinge mechanism performs preliminary positioning action through the cam element before the door is fully closed. The cam profile pre-positions the door at the correct angle, preventing misalignment from developing during operation, thus maintaining stability without interfering with ease of operation.
4Adaptability or versatility
If adjustment of door position is performed on conventional hinges, then position change is possible, but the operation is difficult and complicated requiring at least two operators
Solution Approach 1:
The hinge incorporates self-adjusting features through the cam mechanism and elastic element interaction. The system automatically compensates for wear and maintains optimal positioning through its inherent mechanical design, eliminating the need for complex manual adjustment operations that would require multiple operators.
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 hinge effectively supports heavy doors, maintains alignment, reduces wear, and simplifies maintenance by allowing controlled movement and easy adjustment, ensuring safety and longevity.
Implementation Method 1
an elastic counteracting element (61) susceptible to elastically oppose the pushing force imparted by the cam means (50)
Implementation Method 2
At the ends of the passing-through seat (12) respective anti-friction elements (13) are placed, such as bearings
Data Source
AI summary
A hinge for a door anchored to a wall, the hinge including a fixed element coupled to the wall and a movable element coupled to the door. The fixed and movable elements rotate between an open position and a closed position about a first longitudinal axis. One of the movable and fixed elements includes cam means rotating about the first longitudinal axis, the other of the movable and fixed elements including follower means mutually interacting with the cam means for sliding along a second longitudinal axis substantially perpendicular to the first axis. The follower means includes an elastic counteracting element. The cam means includes a first cam element interacting with the follower means for movement from end-stroke positions to an intermediate position and vice-versa. The cam means further includes a second cam element interacting with the follower means for movement from the intermediate position to the end-stroke positions and vice-versa.