Elevator Overspeed Governor Actuator Seat and Reset Lever Mechanism
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Solution Overview
Problem
Existing overspeed governor assemblies for elevators require separate actuators for the remote triggering device and overspeed protection switch, leading to increased costs and complexity in resetting the overspeed protection switch after triggering.
Innovation Solution
A remote triggering device with an actuator seat and reset lever that rotates between positions, using a shared actuator to interact with the centrifugal mechanism and overspeed protection switch, allowing for both remote triggering and resetting of the switch without additional actuators, utilizing a return spring for automatic return to the initial position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate actuators are used for the remote triggering device and overspeed protection switch, then the functions are more reliable, but the device complexity and cost increase
Solution Approach 1:
The single actuator is designed to perform multiple functions: it acts as both the remote triggering device actuator and the overspeed protection switch actuator. The actuator can be positioned to engage with different components (centrifugal mechanism for triggering, reset lever for resetting) to achieve both functions with one device, reducing complexity while maintaining reliability through proper mechanical design
Solution Approach 2:
The patent combines the remote triggering device and overspeed protection switch actuation functions into a single actuator mechanism. By merging these two previously separate functions into one actuator, the overall device complexity is reduced while the integrated design ensures both functions remain reliable through coordinated mechanical action
2Device complexity
If a shared actuator is used for both remote triggering and overspeed protection switch resetting, then the device complexity is reduced, but the ease of operation may be affected
Solution Approach 1:
The actuator is segmented into distinct functional portions: one portion interacts with the centrifugal mechanism for remote triggering, while another portion (reset lever) interacts with the overspeed protection switch for resetting. This segmentation allows each function to be clearly defined and operated independently, maintaining ease of operation despite using a single actuator
Solution Approach 2:
The reset lever is designed to be passively returned to its initial position by the centrifugal mechanism's rotation, rather than requiring active actuation. This inversion of the usual actuation approach simplifies the resetting operation, as the system's normal operation automatically performs the reset function
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 solution reduces the cost of the overspeed governor assembly by sharing the actuator between the remote triggering device and overspeed protection switch, simplifying the mechanism for resetting the switch and enhancing operational efficiency.
Implementation Method 1
the actuator is an electromagnet, and the electromagnet includes a core rod and a buffer sleeve disposed at an end of the core rod
Implementation Method 2
the actuator seat is provided with a return spring so that the actuator seat tends to return to the first position
Implementation Method 3
the overspeed governor assembly includes a centrifugal mechanism that is gradually unfolded as the speed of a sheave increases
Data Source
AI summary
A remote triggering device, an overspeed governor assembly and an elevator system are provided. The remote triggering device includes: an actuator seat mounted on a fixed bracket and rotatable between a first position and a second position; an actuator disposed on the actuator seat and having an action end movable between a retracted position and an extended position; and a reset lever extending from the actuator seat; wherein in a case that the centrifugal mechanism of the overspeed governor assembly rotates in a first direction corresponding to ascending of an elevator car, when the action end of the actuator moves to the extended position, the centrifugal mechanism of the overspeed governor assembly contacts the action end of the actuator and drives the actuator seat to rotate from the first position toward the second position, and the reset lever rotates with the actuator seat.