AUXILIARY BRAKE TO PREVENT REVERSE STROKE AND EXCEEDING PERMISSIBLE SPEED OF ESCALATOR Russian patent published in 2017 - IPC B66B23/02 B66B29/00 

FIELD: machine building.

SUBSTANCE: auxiliary brake to prevent reverse stroke and exceeding permissible speed of an escalator is installed on the escalator rotation shaft rotating in the forward or reverse direction by a drive motor to move up or down the chain carrying the escalators steps with driving sprockets attached to opposite end sections of the escalator rotation shaft and engaged with the chain; a reverse rotation sensor for identification of the escalator shaft rotation direction; an exceeding permissible speed sensor for measurement of the shaft rotation speed; an auxiliary brake of emergent stop to stop rotation of the shaft; a control unit to control the auxiliary brake of emergent stop by making a decision on occurrence of an emergency depending on signals coming from the reverse rotation sensor and the exceeding permissible speed sensor. Auxiliary brake of emergent stop includes the first braking assembly installed in the middle part of the escalator rotation shaft to apply braking force to the middle part of this shaft, herewith the first braking assembly comprises a brake disc attached to the said shaft. Auxiliary brake of emergent stop includes the second braking assembly installed near the first or the second sprocket.

EFFECT: invention provides higher efficiency of emergent stop.

1 cl, 11 dwg