An anti-fall self-locking device for vertically lifting elevators

Abstract

The invention discloses an anti-fall self-locking device for a vertical hoisting elevator. The device is mounted on a car bottom frame of the elevator, and comprises a rack rod and a straight gear shaft; the rack rod is provided with a rack and a strip-shaped plate; the rack rod is vertically mounted on a building wall of an elevator shaft; the straight gear shaft is provided with a straight gear and a hexagonal block; three blind holes are radially formed in three spaced surfaces of the hexagonal block; a bulb cylinder rod is inserted in each blind hole; and cylindrical spiral stretching springs are arranged at one ends, facing to the axes, of the bulb cylinder rods. When an elevator traction rope is ruptured, the falling speed is higher than the normal operating speed; when the elevator falls to the rack rod position, the straight gear is engaged with the rack, and the straight gear and the hexagonal block also rotate at high speed; the centrifugal force of the bulb cylinder rods overcome the tension of the cylindrical spiral stretching springs to enable the bulb cylinder rods to radially extend outwards; and the extending bulb cylinder rods form self-locking included angles with the strip-shaped plate, so that the elevator is clamped in a self-locking manner to stop falling.

Description

technical field [0001] The invention relates to the technical field of elevators, in particular to an anti-falling self-locking device for vertically lifting an elevator. Background technique [0002] At present, one of the hidden dangers of the vertical hoisting elevator is that the traction rope of the elevator breaks, causing the elevator to fall. Elevator fall prevention devices and safety currently mainly rely on fall arresters, lower limit travel switches and three-phase limit switches. The electrical appliances of these structures are prone to failure when the power is cut off, and the existing fall arresters are poor in sensitivity and prone to hysteresis Or mistakes, resulting in casualties of elevator personnel. Furthermore, with this type of fall arrester, when an elevator safety accident occurs, the elevator will be stuck in any position, and passengers will be trapped in the elevator and wait for rescue for a long time. Contents of the invention [0003] In ...

AI Technical Summary

Problems solved by technology

[0002] At present, one of the hidden dangers to the safety of vertical lifting elevators is that the elevator's traction rope breaks, causing the elevator to fall.

Elevator fall prevention devices and safety currently mainly rely on fall arresters, lower limit travel switches and three-phase limit switches. Electrical appliances with these structures are prone to failure when the power is cut off, and the existing fall arresters are less sensitive and prone to hysteresis or mistakes, resulting in casualties of elevator personnel

Furthermore, with this type of fall arrester, when an elevator safety accident occurs, the elevator will be stuck in any position, and passengers will be trapped in the elevator and wait for rescue for a long time.

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