SAFETY BRAKE FOR LIFTING MECHANISM Russian patent published in 2018 - IPC B66D5/34 B66D5/24 F16D48/06 

FIELD: machine building.

SUBSTANCE: invention relates to the safety brake operation method and to the lifting mechanism safety brake. For the ratchet pawl (SK) actuation, lifting electromagnet or other electromechanical actuator (A) is provided, at that, the ratchet pawl (SK) corresponding position is controlled by at least two sensors (S1, S2). With the help of designed for safety control unit, and at least one sensor the load lowering movement is controlled, respectively, the lifting mechanism, and in the event of fault, the safety braking is initiated. At that, the lifting electromagnet, respectively, the ratchet pawl (SK) is positioned so, that, by means of spring force and / or by gravity, the ratchet pawl is engaged then, when the actuator, respectively, the lifting magnet, is de-energized, respectively, disconnected from the power supply. With this safety brake, it is possible to accurately set and monitor the speed limit, with the exceeding of which, the safety brake must be initiated. By using two sensors (S1, S2) or, respectively, switches, with the help of the control unit it is additionally possible to control the ratchet pawl function and movement and the unwanted operating states recognition, for example, in cases when the safety brake is engaged, and the lifting mechanism drive continues to lower the load.

EFFECT: inventions enable increase in the braking reliability.

13 cl, 3 dwg