Lift Speed Limiter Ring Gear Blocking Mechanism
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing speed limiter devices for lifts lack a comprehensive solution to detect and prevent uncontrolled movement of lift cars, especially those with varying pulley geometries and dimensions, which can compromise safety.
Innovation Solution
A device coupled to the speed limiter featuring a ring gear, pivoting support with a blocking mechanism actuated by an electromagnet or solenoid, and an electrical detector that sends a signal to stop the lift car when uncontrolled movement is detected, ensuring compatibility with different pulley sizes and geometries.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a device for detecting uncontrolled movement of lift car is added to the speed limiter, then safety of the lift is improved, but device complexity increases
Solution Approach 1:
The detection device is integrated into the existing speed limiter structure, allowing the speed limiter to perform both its original speed regulation function and the new function of detecting uncontrolled car movement. The pivoting support means with blocking mechanism serves multiple purposes: it detects movement, triggers alarms, and can mechanically stop the car, consolidating multiple safety functions into a single integrated system.
Solution Approach 2:
The patent combines the detection mechanism, signaling system, and mechanical blocking components into a single integrated assembly mounted on the speed limiter. The pivoting support means integrates the blocking mechanism, electrical detector, and signaling components into one unified structure, reducing overall system complexity while maintaining comprehensive safety functionality.
2Reliability
If a detection device with blocking mechanism is integrated into the speed limiter, then safety against uncontrolled movement is improved, but the device geometry must adapt to different pulley dimensions
Solution Approach 1:
The pivoting support means is designed with rotational freedom, allowing it to dynamically adjust its position and orientation based on the specific pulley geometry it encounters. This dynamic adaptability enables the same device to function correctly with pulleys of various dimensions without requiring custom-designed components for each pulley size.
Solution Approach 2:
The device allows for adjustment of geometric parameters such as the position of the pivoting support, the angle of the blocking mechanism, and the placement of electrical detectors. These adjustable parameters enable the device to adapt to different pulley radii, shapes, and mounting configurations, ensuring universal applicability across various lift systems.
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 effectively detects and prevents uncontrolled lift car movement, enhancing safety by actuating a control unit to stop the lift, regardless of pulley dimensions, thus improving safety measures in lifts with diverse geometries and dimensions.
Implementation Method 1
a blocking mechanism with linear motion that acts on the ring gear by means of an electromagnet, solenoid or the like
Implementation Method 2
a blocking mechanism with linear motion that acts on the ring gear by means of an electromagnet, solenoid or the like
Data Source
AI summary
Device for protecting against the uncontrolled movement of a lift car, which is suitable for being coupled to a speed limiter having a pulley (2) on a shaft (3), said device comprising: a ring gear (5) connected to the pulley; a pivoting support means (6) which can be coupled to the shaft (3), carries out a pivoting movement with respect to said shaft (3) and includes a blocking mechanism which acts on the ring gear (5) by means of an electromagnet, a solenoid or the like; and an electrical detector which is connected to the blocking mechanism and the movement trajectory of the pivoting support means (6) and, when the blocking means act on the ring gear (5), when the pivoting support means (6) has carried out an angular movement, the electrical detector sends an activation signal to a control unit connected to the lift in order to actuate means for stopping the lift car.