Ground-Mounted Motor-Driven Block System for Closure Wing Gap Elimination
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Solution Overview
Problem
Existing ground mounted motor-driven block systems for closure wings allow leeway in closure wing movement due to the circular path of the contact surface, resulting in undesirable gaps between the closure wing and the contact surface.
Innovation Solution
The contact surface is formed by the leading surface of the blocking member, rotating from an upwardly facing position to a closure wing-facing position, and the blocking member acts as a first-order lever, ensuring the contact surface moves closer to the closure wing as it extends, eliminating gaps and providing accurate force control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the contact surface is formed by a tangential surface of a pivotable blocking member, then the blocking member can be actuated through a circular path, but the contact surface moves farther away from the closure wing as it rises, creating undesirable gaps
Solution Approach 1:
Instead of having the contact surface form a circular arc path (traditional approach), the patent inverts the approach by making the contact surface planar and perpendicular to the pivot axis, while allowing the blocking member itself to rotate. This inversion resolves the contradiction by maintaining constant proximity through a different geometric configuration.
Solution Approach 2:
The patent transitions from a two-dimensional circular arc contact surface to a three-dimensional configuration where the contact surface is planar and perpendicular to the pivot axis. This dimensional change allows the contact surface to maintain constant distance from the closure wing throughout the rotation, eliminating the gap issue while preserving the circular actuation path.
2Device complexity
If a third order lever is used in the blocking member, then the actuation mechanism can be simplified, but the force multiplication control becomes less accurate
Solution Approach 1:
The patent changes the lever class parameter from third order to first order, fundamentally altering the force multiplication characteristics. This parameter change enables more precise control over the force application while maintaining structural simplicity through the planar contact surface configuration.
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
This configuration ensures that the contact surface maintains close proximity to the closure wing in its extended position, eliminating gaps and enhancing the system's ability to accurately control force multiplication, thereby improving the effectiveness of the block system.
Implementation Method 1
the blocking member forms a first order lever having a fulcrum coinciding with the second pivot axis, an effort arm providing said contact surface and a load arm cooperating with the moveable actuation rod
Implementation Method 2
allows for a more accurate force multiplication control
Data Source
Figure 1
Figure 2
Figure 3A~3C
AI summary
A ground mounted motor-driven block system (6) for a closure wing (1) comprises: a frame; a blocking member with a contact surface configured to be raised or lowered with respect to the frame and being formed by a leading surface of the blocking member when the blocking member rotates from a position in which the closure wing is free to move to a closure wing blocking position; a moveable actuation rod configured to rotate the blocking member; and a motorized drive mechanism configured to move the moveable actuation rod. The blocking member forms a first order lever having a fulcrum, an effort arm providing said contact surface and a load arm cooperating with the moveable actuation rod. By having the contact surface formed by a leading edge of the blocking member, the contact surface moves closer to the closure wing the higher is goes with respect to the frame.