AUXILIARY DRIVE FOR BRAKE CATCHING DEVICE Russian patent published in 2021 - IPC B66B5/18 

FIELD: mechanical engineering.

SUBSTANCE: auxiliary drive (1) for actuating the elevator brake has at least one friction body applied to the brake bar, a rotary body on which the friction body is held with the possibility of moving relative to it and with the possibility of rotating together with it around the main axis (2) located outside the friction body, a spring element and at least one electromagnet, as well as a transfer element for transmitting the rotary movement of the rotary body to the elevator brake. The friction body can be transferred when the spring element is straightened or compressed from its ready position on the rotary body to its actuation position on the rotary body and vice versa. At least one electromagnet in its first switching state holds the friction body in its ready position on the rotary body, and in its second switching state releases it in such a way that the friction body, under the influence of the force of the spring element, is able to move from at least one electromagnet to its ready position on the rotary body and come into contact with the friction stopper to the brake bar. In the second switching state, there is an air gap between the electromagnet and the structural element attracted by it. The friction body, the rotary body, the main axis and the brake bar are positioned relative to each other in such a way that the friction body, under the influence of friction forces arising on it, turns the rotary body around the main axis (2) closer to the brake bar in such a way that the friction body is again pressed from the brake bar to a position on the rotary body that is located closer to its ready position than in its actuation position, or which corresponds to its ready position, and thus the air gap is reduced or eliminated, through which the electromagnet should attract the end of the swinging lever associated with it. The elevator contains the specified auxiliary drive.

EFFECT: inventions provide reliable operation of the braking device.

19 cl, 15 dwg