Elevator Governor Lock Mechanism for Remote Triggering
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Solution Overview
Problem
Existing car-mounted governor assemblies are not suitable for high-speed elevators due to limitations in remote triggering and adjustable speed limit ratios, and they lack a compact structure.
Innovation Solution
A governor assembly with a lock mechanism comprising rockers and rollers that pivot between positions to engage or disengage with a core ring, allowing for adjustable speed limit ratios and remote triggering, integrated with a centrifugal mechanism and a compact design suitable for high-speed elevators.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a conventional governor assembly is used with direct action from electromagnet to centrifugal block support, then the structure is simple, but the manufacturing precision requirements are high and it is not suitable for high-speed elevators
Solution Approach 1:
A contact member with a smooth transitional surface is introduced as an intermediary between the electromagnet and the centrifugal block support. This contact member acts as a mediator that transfers the triggering force while reducing impact and friction, thereby lowering manufacturing precision requirements and enabling high-speed elevator application
Solution Approach 2:
The governor assembly is divided into functionally independent modules: the centrifugal mechanism with centrifugal block support, the lock mechanism with rockers and rollers, and the remote triggering apparatus with contact member. This segmentation allows each module to be optimized independently, reducing overall manufacturing precision requirements while maintaining functional integrity
2Volume of moving object
If a car mounted governor is used to save hoistway space, then the structure is compact, but the remote triggering and speed limit ratio adjustment become difficult
Solution Approach 1:
The contact member serves as a remote triggering intermediary that can be actuated from a distance to engage the lock mechanism. This allows the compact car-mounted governor to be triggered remotely without requiring direct manual intervention, maintaining ease of operation while preserving compact dimensions
Solution Approach 2:
The lock mechanism employs dynamic rockers and rollers that can pivot between engaged and disengaged states. This dynamic design allows for easy adjustment of speed limit ratios by changing the engagement point on the core ring, while maintaining the compact car-mounted structure
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 effective remote triggering and adjustable speed control, reducing manufacturing precision requirements and allowing the governor assembly to be applied to high-speed elevators while maintaining a compact structure.
Implementation Method 1
When the rotating speed of a sheave exceeds a first limit value, the governor assembly invented by Aguado et al. can expand a centrifugal block support rotating together with the sheave, to trigger an electrical switch to cut off the electricity
Implementation Method 2
When the rotating speed of the sheave exceeds a second limit value greater than the first limit value, a roller on the inner side of a connecting rod of a centrifugal mechanism of the governor assembly will be jointed to a core ring, such that the core ring is driven by the sheave and triggers a safety apparatus
Implementation Method 3
the safety apparatus can generate mechanical friction with a rail to brake the car
Implementation Method 4
The existing remote triggering apparatus is mainly composed of an electromagnet, and a tail end of a column of the electromagnet directly acts on a plastic-made centrifugal block support of the centrifugal mechanism
Data Source
AI summary
A governor assembly and an elevator system. The governor assembly includes: a stationary shaft; a sheave arranged on the stationary shaft and rotatable on the stationary shaft; a core ring arranged on one side of the sheave on the stationary shaft and associated with a safety apparatus; and a lock mechanism including a plurality of rockers, wherein each rocker includes a first end pivotably connected to the sheave and a second end connected to a respective roller, the plurality of rockers are connected by connecting rods such that the plurality of rockers can be pivoted synchronously between a first position where the respective roller is separated from the core ring and a second position where the respective roller is jointed to the core ring, and in the second position, each roller rotates along with the sheave to drive the core ring, thus triggering the mounting apparatus.