Flap Lock Wear Reduction via Translational Unlocking
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Solution Overview
Problem
The high surface pressure between locking hooks and locking elements in bulk goods wagon closure flaps leads to excessive wear, necessitating frequent replacement of wear parts and resulting in costly downtimes.
Innovation Solution
The locking hook performs a translational movement before a rotary pivoting movement to reduce contact pressure, and is connected to a rotatably mounted actuating shaft, allowing for a space-saving arrangement with minimal wear, and is actuated by a pneumatic, hydraulic, or electric drive.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the locking hook performs a pure rotary pivoting movement to unlock the closure flap, then the locking mechanism is simple, but the surface pressure between the locking hook and locking element is very high causing excessive wear
Solution Approach 1:
The locking hook's movement is transformed from a simple rotary pivoting motion to a combined translational and rotary motion sequence. The hook first translates in the opening direction to lift off the locking element, then rotates to the release position. This dynamic motion sequence reduces contact pressure and wear during the unlocking process.
Solution Approach 2:
The actuating shaft serves as an intermediary mechanism that converts rotational motion into the sequential translational and rotary movements of the locking hook. Through the crank arm and pivot bearing arrangement, the actuating shaft mediates the motion transformation, enabling the locking hook to first translate and then rotate, thereby reducing wear on the locking element.
2Reliability
If multiple locking hooks are used to secure the closure flap under high load, then the locking reliability is improved, but the space required for the locking arrangement increases
Solution Approach 1:
Multiple locking hooks are connected to a common actuating shaft, merging their actuation into a single rotational movement. This allows multiple hooks to be operated simultaneously or in sequence by one drive mechanism, reducing the overall space required compared to having separate actuating mechanisms for each hook.
Solution Approach 2:
The actuating shaft performs multiple functions: it rotates to unlock multiple locking hooks, provides the translational movement through its eccentric/crank mechanism, and serves as a common drive for the entire locking system. This multi-functionality reduces the number of separate components and minimizes the space required for the locking arrangement.
3Reliability
If the locking hook is designed to perform translational movement before rotary pivoting, then wear is reduced, but the device complexity increases
Solution Approach 1:
The locking hook mechanism uses dynamic motion sequencing, where the hook first translates along the opening direction and then rotates to the release position. This is achieved through the pivot bearing arranged at a distance from the actuating shaft's rotation axis, creating a mechanical path that naturally produces the translational-then-rotary motion sequence, reducing wear without excessive 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
Significantly reduces wear between the locking hook and locking element, allowing for multiple hooks to be operated by a single actuating shaft, minimizing maintenance and operational costs.
Implementation Method 1
the actuating shaft is designed as an eccentric or crankshaft and has a pivot bearing which is arranged eccentrically or at a distance from the axis of rotation of the actuating shaft
Data Source
Figure 1
Figure 2a~2e
AI summary
The flip-top closure (10) has a cover flap arranged around a flap axis (14) in a tilted manner. A locking hook (17) is translatory arranged between its locking position and its releasing position transverse to the flap axis in opening direction (23) of the cover flap.