Elevator Safety Device Using Guide Rope Clamping
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Solution Overview
Problem
Existing elevator systems rely on rigid T-shaped guide rails, which are cumbersome and costly to install, and lack efficient safety mechanisms to prevent overspeed accidents, particularly in high-rise buildings.
Innovation Solution
A safety device using a guide rope as a guide rail with clamping components that restrict speed or stop the elevator car or counterweight when overspeed is detected, featuring a body with first and second components that define a passage for the rope, allowing it to pass freely during normal operation but clamping when speed thresholds are exceeded, and utilizing a guide groove and actuating components for relative movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If rigid T-shaped guide rails are used in elevator systems, then the guide rail provides stable guidance and support, but the installation becomes cumbersome and costly
Solution Approach 1:
The patent replaces the traditional rigid T-shaped guide rail mechanical structure with a guide rope system. The guide rope is suspended between the top and bottom of the hoistway, eliminating the need for complex rail installation while providing flexible guidance for the elevator car and counterweight. This substitution reduces installation complexity while maintaining guidance functionality.
Solution Approach 2:
The guide rope acts as a flexible element that replaces the rigid guide rail structure. The rope can bend and adapt to the hoistway space without requiring precise installation alignment, thereby simplifying installation while providing stable guidance through its tensile strength and flexibility.
2Reliability
If traditional safety devices are designed to match T-shaped rigid guide rails, then they provide adequate safety function, but they cannot be effectively applied to guide rope-based systems
Solution Approach 1:
The safety device is designed with universal adaptability to work with guide rope-based elevator systems. The clamping components can effectively grip the guide rope to prevent overspeed accidents, while the guide shoe structure can accommodate both guide rope and traditional guide rail configurations, making the device versatile across different elevator system types.
Solution Approach 2:
The safety device uses adjustable parameters such as the opening distance between clamping components and the positioning of the guide shoe to adapt to different guide rope diameters and tensions. This allows the same safety device design to be effectively applied across various guide rope specifications while maintaining safety functionality.
3Ease of operation
If the passage width is large enough for free rope movement, then normal operation is smooth, but overspeed detection and clamping response is delayed
Solution Approach 1:
The passage width is designed to be dynamically adjustable rather than fixed. During normal operation, the passage maintains a larger width to allow smooth rope movement. When overspeed is detected, the clamping components rapidly move to reduce the passage width, creating immediate friction to slow the rope and stop the elevator car. This dynamic adjustment resolves the contradiction between smooth operation and rapid response.
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 provides a compact, reliable, and easily installable safety mechanism that effectively prevents accidents by restricting speed or stopping the elevator car or counterweight, enhancing safety performance and reducing installation costs and complexity.
Implementation Method 1
the first and second components are configured for clamping the guide rope in the passage when a running speed of the running device exceeds a threshold
Implementation Method 2
a relative movement between the first and second components occurs so that the internal gap distance of the passage becomes smaller, until the first and second components contact the guide rope and clamp it in the passage
Data Source
AI summary
A safety device for an elevator system, and an elevator system. The elevator system includes a guide rope arranged in a hoistway to be used as a guide rail and a running device running along the guide rope, and the safety device includes a body which is connected to the running device, and a first component and a second component which are provided on the body and define a passage for the guide rope to pass through freely when the running device is in normal operation, the first and second components are configured for clamping the guide rope in the passage when a running speed of the running device exceeds a threshold, to restrict the speed of the running device or stop the running device.