Rack and Pinion Barrier Operator with Vertical Track Coupling
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Solution Overview
Problem
Existing barrier operator systems with motor-driven push-pull drive mechanisms, such as rack and pinion drives, face challenges in manual operation during power outages or malfunctions, leading to potential damage from improper limit registration and uneven wear due to misalignment and exposure to elements, and lack versatility in coupling location.
Innovation Solution
A barrier operator system that positions the pinion on tracks to engage the rack for both upstream and downstream movement, allowing coupling at various points along the barrier, with a coupling assembly that decouples from the motor to enable easy manual operation without resistance, maintaining registration and reducing wear through precise engagement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the rack is coupled to the bottom of the door as in Coubray, then the door can be moved by the rack and pinion mechanism, but the rack teeth are subjected to undue wear and the coupling mechanism is exposed to water, snow and other elements
Solution Approach 1:
The rack is repositioned from the bottom of the door to a vertical track along the side of the door, changing the spatial dimension and location of the coupling mechanism. This elevates the rack away from ground-level elements like water and snow, and positions it in a more protected environment while maintaining its door-moving function through the pinion engagement.
Solution Approach 2:
The pinion is pre-positioned on the vertical track before door installation, ensuring proper alignment with the rack. This preliminary positioning prevents misalignment during operation, reducing unnecessary wear on the rack teeth and pinion while ensuring reliable engagement for door movement.
2Ease of manufacture
If the pinion is not pre-positioned on the tracks, then installation is simpler, but the engagement of the pinion with the rack is subject to misalignment during on site assembly which results in unnecessary wear
Solution Approach 1:
The pinion is pre-mounted on the vertical track at the correct position and orientation before the door is installed. This preliminary action ensures that when the rack is later engaged with the pinion, proper alignment is already established, preventing misalignment issues and unnecessary wear during operation while maintaining straightforward installation procedures.
3Ease of operation
If the rack is coupled to the bottom of the door, then the door can be moved, but the pinion is not configured to exert driving forces upstream to drive the rack and door upstream in the direction of the horizontal portion of the tracks
Solution Approach 1:
The rack is repositioned from a horizontal configuration at the bottom of the door to a vertical configuration along the side of the door. This dimensional change allows the pinion to engage the rack and exert driving forces in both upstream and downstream directions along the vertical track, providing versatility for bidirectional door movement while maintaining ease of operation.
4Ease of operation
If the motor is disconnected from the door at the motor for manual override, then the user can manually move the door, but the barrier operator loses positional information and may slam the barrier at physical limits causing damage
Solution Approach 1:
The rack serves as an intermediary element that maintains the mechanical connection between the door and the drive system even when the motor is disconnected. The rack remains engaged with the pinion, allowing the motor to retain positional information through the rack's position on the vertical track, while still enabling manual door movement by decoupling the motor from direct door connection.
5Device complexity
If the coupling assembly is fixed at a specific location, then the system structure is simpler, but the system lacks versatility in coupling the rack to the barrier at different positions
Solution Approach 1:
The coupling assembly is designed with movable and adjustable components that allow the rack to be positioned at different locations along the vertical track. The pinion can engage the rack at various heights, providing versatility for coupling the door at different positions while maintaining a relatively simple overall structure through the use of standardized track and engagement mechanisms.
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 easy manual operation of barriers without pushing or pulling against the drive mechanism, maintains optimal system performance by avoiding unnecessary wear and ensuring proper limit registration, and protects components from elements by allowing flexible coupling locations.
Implementation Method 1
A barrier operator system positions the pinion on tracks to engage the rack for both upstream and downstream movement
Implementation Method 2
A barrier operator system that positions the pinion on tracks to engage the rack for both upstream and downstream movement, allowing coupling at various points along the barrier, with a coupling assembly that decouples from the motor to enable easy manual operation without resistance
Data Source
AI summary
A barrier operator system including, method and kit described herein contemplate the use a rack and pinion drive mechanism which is mounted on tracks of the operator system such that the pinion is positioned to engage the rack which is coupled to the barrier to move the barrier along the tracks in both the upstream and downstream direction. Pre-positioning the pinion relative to the rack and using the rack and pinion drive permits coupling the rack and motor at any variety of points along the barrier to move it. Further when the barrier is an over head door, such as a garage door, the door is connected to the rack through a coupling assembly which connects the door to the rack.