Overspeed protection mechanism for assisting ladder

Abstract

The invention relates to an overspeed protection mechanism for an assisting ladder. The overspeed protection mechanism comprises a rack, a transmission mechanism which is driven to move along a guide rail is arranged on the rack and is a gear rack mechanism, a gear is arranged on a rotating shaft, a polygonal lug is also arranged on the rotating shaft coaxial to the gear, a semi-circular swing arm which is matched and connected with the polygonal lug is arranged on the outer circumference of the polygonal lug, one end of the swing arm is hinged on the rack by a pin shaft, a contact point is arranged on the other end of the swing arm, and a small cylinder matched with the polygonal lug is arranged at the center of the upper part of the swing arm; a guide wheel connected with the guide railis arranged at the rear part of the polygonal lug, a groove is arranged on the surface of the outer circumference of the guide wheel, a rail pressing gear block is connected in the groove in a clamping manner and connected with the guide wheel by a switch trigger rod; and the rail pressing gear block is connected with the rack by a connecting mechanism. The overspeed protection mechanism has a simple structure, is convenient to manufacture and install, good in safety and reliability and long in service life.

Description

technical field [0001] The invention relates to a protection system for a booster ladder, in particular to an overspeed protection mechanism used for an emergency stop when the booster lift suddenly slides down rapidly. Background technique [0002] Elevators include safety systems to prevent the elevator from traveling at high speeds in response to elevator components breaking or otherwise becoming inoperative. [0003] At present, in the multi-storey civil buildings in the city, a booster ladder is installed on the stairs to facilitate people with walking disabilities (disabled and elderly and weak patients) to go up and down the stairs by themselves, which not only occupies a small area, but also has low cost. However, the booster lift in the prior art does not have an overspeed protection mechanism during operation, and when a failure cannot be avoided, the booster lift chair can stop on the inclined guide rail without quickly sliding down, which has potential safety haz...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the above-mentioned disadvantages such as no overspeed protection mechanism and potential safety hazards in the booster lift in the prior art, the applicant provides a booster lift overspeed protection mechanism with reasonable structure and convenient manufacture, thereby improving the safety performance of the booster lift , to ensure the safety of passengers and prolong the service life

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