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Elevator governor

A technology of elevator car and rotation speed, which is applied in the field of elevator speed control, and can solve the problems of complexity and cost increase

Inactive Publication Date: 2003-04-02
OTIS ELEVATOR CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] While different types of devices are proposed or used to control the unwanted upward movement of the elevator car, they add additional complexity and cost to the elevator system

Method used

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Examples

Experimental program
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Embodiment Construction

[0016] The assembly 20 for controlling the movement of an elevator car in an elevator system has the ability to prevent undesired high-speed movement of the elevator car in two directions, ie, for example, upward and downward within the elevator hoistway. Elevator sheave 22 is supported by mounting member 24 for rotation about axis 26 as an elevator car (not shown) moves between landings, for example, within a building. In the example shown, pulley 22 rotates in a clockwise direction as indicated by arrow 28 as the elevator car moves downward.

[0017] The mounting member 24 may be located in a machine room, on the car, or at another location within the hoistway. The pulley 22 preferably rotates with the movement of the ropes and belts in the elevator system. It is an advantage of the present invention to provide an overspeed protection device suitable for use on different types of sheaves in an elevator system. Assembly 20 may be supported on a driving sheave, driven sheave...

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PUM

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Abstract

A centrifugally activated device for controlling the speed of movement of an elevator cab includes the capability of controlling upward and downward movement. A first stopping device is associated with at least one elevator sheave. A second stopping device preferably is supported on an opposite side of the same sheave. The second stopping device preferably includes centrifugally activated components such as a latch member that moves from a first position into a second, stopping position responsive to an undesirably high speed of upward movement of the elevator cab. The centrifugally activated components preferably include a latch member that is rotatably supported on the sheave and has an engaging member at one end that engages a cooperating stop surface near the sheave to prevent the sheave from further rotation upon the sheave reaching an undesirably high rate of rotation. In one example, the inventive arrangement also includes a device for preventing both stopping devices from being simultaneously activated.

Description

technical field [0001] Generally, the present invention relates to elevator speed control. More particularly, the invention relates to a device for preventing movement of an elevator car beyond a desired speed. Background technique [0002] Elevator control systems typically include a variety of components or devices for controlling the movement of the elevator car within the elevator hoistway. Such a device is known as a governor and is often associated with a motor that drives the elevator system components or with at least one of the pulleys that rotate as the elevator car moves between landings in, for example, a building . A typical governor is used to stop an elevator car from moving in a downward direction beyond a desired speed. [0003] Centrifugally actuated elevator governors associated with pulleys are known. One example includes a set of arcuate plates that move from a retracted position to an extended position in which they provide braking for rotational mo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60T1/06B66B5/04F16D63/00F16D65/14
CPCF16D2127/002F16D2127/004B66B5/044F16D63/00B60T1/062
Inventor L·M·桑切斯F·德尔里奥桑斯F·S·科斯加亚
Owner OTIS ELEVATOR CO