Lid Closure Pivot Pin Locking Against Axial Pull-Out
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Solution Overview
Problem
Existing lid closure mechanisms with rotating pins lack sufficient protection against loss, particularly under axial forces, and often require additional securing elements like split pins.
Innovation Solution
A rotating pin and pin carrier system with a locking device that forms an axial positive connection in the locked position, utilizing a resilient element and coordinated profiles to secure the pin against displacement without additional securing elements, allowing for easy assembly and reduced risk of damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a rotating pin is used to connect the cover to the housing, then the connection is simple and cheap, but the pin is not sufficiently secured against loss under axial forces
Solution Approach 1:
The safety device and locking device are integrated into the rotating pin itself, merging multiple functions (safety retention and locking) into a single component. This eliminates the need for separate securing elements like split pins while maintaining reliability against loss.
Solution Approach 2:
The rotating pin automatically forms a positive connection with the housing in the locked position through its own geometry and the interaction with the resilient element, without requiring additional external securing components. The pin secures itself against loss through the axial positive connection mechanism.
2Reliability
If additional securing elements like split pins are used to secure the rotating pin, then the pin is better secured against loss, but the device complexity and risk of damage increase
Solution Approach 1:
The safety device and locking device are integrated into the rotating pin itself, merging multiple functions (safety retention and locking) into a single component. This eliminates the need for separate securing elements like split pins while maintaining reliability against loss.
Solution Approach 2:
The invention extracts and eliminates the need for additional securing elements (split pins, cross pins) by incorporating all necessary securing functions directly into the rotating pin and its interaction with the housing, thereby reducing the total number of components.
3Reliability
If a resilient element with spring preload is used to secure the rotating pin, then the pin is secured against small axial forces, but larger axial forces can still overcome the securing device
Solution Approach 1:
The system transitions from a static resilient element to a dynamic locking mechanism. In the locked position, the rotating pin forms a rigid positive connection with the housing that can absorb larger axial forces, while the resilient element provides dynamic retention for small forces. The system adapts its force resistance based on the operational state.
Solution Approach 2:
The force resistance is segmented into two levels: the resilient element handles small axial forces through elastic deformation, while the locking device with positive connection handles larger axial forces through rigid mechanical engagement. This segmentation allows each component to be optimized for its specific force range.
4Ease of manufacture
If the rotating pin is inserted into the insertion opening, then the lid can be assembled easily, but the pin can be pushed out in the opposite direction by axial forces from the housing
Solution Approach 1:
The system transitions from a static resilient element to a dynamic locking mechanism. In the locked position, the rotating pin forms a rigid positive connection with the housing that can absorb larger axial forces, while the resilient element provides dynamic retention for small forces. The system adapts its force resistance based on the operational state.
Solution Approach 2:
The locking device creates an asymmetric connection where the pin can be easily inserted in one direction but is securely locked against removal in the opposite direction. The positive connection geometry provides different resistance characteristics for insertion versus extraction, enabling easy assembly while preventing accidental disassembly.
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 system effectively secures the rotating pin against loss by forming a strong axial positive connection in the locked position, absorbing larger axial forces and preventing displacement, while allowing easy insertion and rotation without friction locks or pretension.
Implementation Method 1
In the insertion position, a resilient element of a safety device acts on the rotating pin via a clamping force of spring preload
Implementation Method 2
a resilient element of a safety device acts on the rotating pin via a clamping force of spring preload
Implementation Method 3
the rotating pin and the rotating pin carrier form by means of a locking device an effective positive connection which prevents axial movement of the rotating pin against the insertion direction
Data Source
Figure 1
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Figure 3
AI summary
The invention relates to a cover (10) for connection with a housing (20), comprising a closure (12) which has a pivot pin (14), wherein the pivot pin (14) can be inserted in an insertion direction (26) into an insertion opening (16) of a pivot pin carrier (18) up to an insertion position, wherein the pivot pin (14) is secured in the insertion position by means of a spring-loaded element (36) of a locking device (34) in the pivot pin carrier (18) against the insertion direction (26), wherein the pivot pin (14) is rotatably mounted about a pivot axis (24) between an open position and a locked position in the pivot pin carrier (18), and wherein the pivot pin (14) can be moved from the open position to the locked position by turning it.The invention is characterized in that the pivot pin (14) and the pivot pin carrier (18) form an effective positive locking mechanism in the locked position by means of a locking device (48), which prevents an axial movement of the pivot pin (14) against the insertion direction (26) and wherein the axial positive locking mechanism is released in the open position.