Elevator Governor Remote Trigger Pivoting Member

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Solution Overview

Problem

Existing remote trigger apparatuses for governor components in elevators, particularly those designed for high-speed elevators, face challenges in safely and effectively triggering the governor without causing damage due to high rotational inertia and speed, often resulting in rigid collisions that can damage components.

Innovation Solution

A remote trigger apparatus featuring a pivoting member with a semicircular receiving port and an actuator, such as an electromagnet, that rotates from an idle to an operating position to radially push a contact part of the centrifugal mechanism, triggering the governor component while minimizing impact and using a reset spring to return to the idle position, ensuring no rigid collision and compatibility with high-speed elevators.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If a remote trigger apparatus is used to actively trigger the governor component for testing, then the governor can be triggered without stalling the car, but rigid collision between the electromagnet and centrifugal mechanism may occur causing component damage

Engineering Contradiction:

Improvetesting capabilityVSAvoidimpact damage

Core Design Contradiction:

Ease of operationVSObject-affected harmful factors

Solution Approach 1:

A pivoting member with arc-shaped contact surface is introduced as an intermediary between the electromagnet and the centrifugal mechanism. This mediator enables remote triggering while distributing impact forces through its curved surface, preventing rigid collision damage to the plastic centrifugal mechanism components.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The pivoting member's arc-shaped contact surface serves as a cushioning element that absorbs and distributes impact energy before it reaches the centrifugal mechanism. This beforehand cushioning prevents damage during the triggering action.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

2Adaptability or versatility

If a smooth transitional surface contact part is adopted for high-speed elevators, then compatibility with high-speed elevators is improved, but the complexity of the device increases

Engineering Contradiction:

Improvehigh-speed elevator compatibilityVSAvoiddevice structure

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The pivoting member incorporates an arc-shaped contact surface that provides smooth transitional contact with the centrifugal mechanism. This curved geometry enables compatibility with high-speed elevator operations while maintaining a relatively simple device structure.

Inventive Principle:

Principle #14Spheroidality (Curvature)

3Reliability

If the pivoting member radially pushes the contact part inward to trigger the governor, then effective triggering is achieved, but impact force may damage the centrifugal mechanism

Engineering Contradiction:

Improvetriggering reliabilityVSAvoidcomponent durability

Core Design Contradiction:

ReliabilityVSStrength

Solution Approach 1:

The arc-shaped contact surface on the pivoting member distributes the radial pushing force across a curved contact area rather than a single point. This curvature enables reliable triggering while reducing peak impact forces that could damage the centrifugal mechanism components.

Inventive Principle:

Principle #14Spheroidality (Curvature)

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 solution allows for safe and effective triggering of the governor component with reduced impact on the centrifugal mechanism and actuator, preventing damage and enabling operation in high-speed elevators by dispersing the impact force through surface contact and precise alignment, ensuring reliable operation.

Implementation Method 1

The actuator is an electromagnet that can perform linear displacement and act on a back side of the pivoting plate to push the pivoting plate to rotate from the idle position to the operating position.

Methodology Applied

Scientific EffectElectromagnet: Electromagnet

Implementation Method 2

the remote trigger apparatus further includes a reset spring tending to enable the pivoting member to return to the idle position

Methodology Applied

Scientific EffectElasticity: Elasticity

Implementation Method 3

a centrifugal mechanism rotating together with a sheave is triggered when the rotational speed of the sheave exceeds a certain value

Methodology Applied

Scientific EffectCentrifugal force: Centrifugal Force

Data Source

PatentEP3505481B1Remote triggering device, governor assembly and elevator

Publication Date: 2021.08.18 OTIS ELEVATOR CO

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Figure 2~3
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AI summary

The present disclosure relates to a remote trigger apparatus, a governor component having the remote trigger apparatus, and an elevator. The remote trigger apparatus includes: an actuator 1; and a pivoting member 2 rotatable around an axis 24, wherein the actuator enables the pivoting member to rotate from an idle position to an operating position, in the idle position, the pivoting member keeps separate from a centrifugal mechanism 32 of the governor component, in the operating position, the pivoting member is jointed to a contact part 322 of the centrifugal mechanism of the governor component, and the pivoting member further rotates along with the centrifugal mechanism and radially pushes the contact part inward, so as to trigger the governor component. In the remote trigger apparatus the pivoting member may guide the centrifugal mechanism gradually and gently, thus avoiding direct impacts on the centrifugal mechanism of the governor component and problems caused by the direct impacts.