Pivot Control Mechanism for Turnstile Directional Locking
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Solution Overview
Problem
Traditional pivot control mechanisms for turnstiles are bulky, costly, and require extensive hardware and maintenance due to complex designs and multiple components, leading to weight, handling, and manufacturing challenges, as well as issues with rotor control mechanisms taking excessive space.
Innovation Solution
A simplified pivot control mechanism design featuring a 'U' shaped channel with a cage-like structure, using bearing mounting holes and welded blocks for security, with a solenoid bracket, micro-switches, shock absorbers, and torsion springs for selective rotational control, reducing component count and complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional double ratchet operation is used for directional control, then rotational control in both directions is achieved, but the mechanism becomes bulky and heavy due to multi-sets of hardware
Solution Approach 1:
The patent combines multiple ratchet sets into a single integrated ratchet mechanism that provides bidirectional rotational control. Instead of using separate ratchet hardware for each direction, the invention merges these functions into one unified structure, reducing the overall number of components and eliminating the bulk associated with multiple hardware sets while maintaining full directional control capability
2Adaptability or versatility
If clutched operated mechanism is used for pivot control, then operational flexibility is improved, but maintenance requirements increase due to constant wear and adjustment needs
Solution Approach 1:
The patent removes the clutch component entirely from the pivot control mechanism. Instead of using a clutched operated system that requires constant maintenance, the invention extracts this problematic element and replaces it with a direct mechanical operation system that maintains operational flexibility without the wear and adjustment issues inherent in clutch mechanisms
Solution Approach 2:
The patent employs simple, robust mechanical components that are inexpensive and durable, replacing complex clutch assemblies with basic mechanical elements that have longer service lives and require minimal maintenance, aligning with the principle of using simpler, more reliable components
3Adaptability or versatility
If multiple separate components are used in pivot control mechanism construction, then functional requirements are met, but manufacturing and assembly complexity increases
Solution Approach 1:
The patent merges multiple separate functional components into integrated assemblies. The pivot control mechanism uses combined structures where single components perform multiple functions, reducing the total number of parts needed while maintaining all necessary functional capabilities for operational control
Solution Approach 2:
The patent designs components with multi-functional capabilities, where single elements serve multiple purposes within the mechanism. This universality reduces the overall component count by eliminating the need for separate dedicated parts for each function, simplifying both manufacturing and assembly processes
4Adaptability or versatility
If traditional rotor control mechanism is used for rotational control, then directional operation is achieved, but excessive space is required accommodating the large component
Solution Approach 1:
The patent employs a compact rotor control mechanism where components are nested within each other or arranged in space-efficient configurations. The control elements are integrated into the existing structure, allowing rotational control functionality to be accommodated within a smaller footprint by utilizing vertical or radial space rather than requiring additional horizontal area
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 new mechanism is more economical to manufacture, reduces bulk and weight, and enhances handling and installation ease while providing efficient rotational control with reduced maintenance needs.
Implementation Method 1
a solenoid bracket with solenoid
Implementation Method 2
a shock absorber mounting bracket with a shock absorber
Implementation Method 3
two locking pawls with torsion springs
Data Source
AI summary
A pivot control mechanism selectively controls rotation of a pivot control shaft by an electric impulse from a solenoid, which locks the pawl into the ratchet, thereby permitting the shaft to rotate in a selected direction. When a passage direction is chosen, the cam followers move out of the home position of a lofted ratchet over the peak position to the next home position. Guiding pins controlling the axial motion of the lofted ratchet in conjunction with the compression springs secure the cam followers in the home position. A shock absorber acting on the cam is used to prevent the turnstile from over rotating with any great amount of force, softening the return of the cam followers to the home position. A micro switch, when activated, sends a signal to the control board, which through the action of the solenoid, locks the pawls into the ratchet.