Elevator parking brake, method for operating an elevator parking brake, and control device for an elevator parking brake

An elevator parking brake, comprising:

• a parking brake frame attachable to an elevator car;
• a brake pad configured to be brought in contact with a guide rail guiding the elevator car along an elevator shaft;
• and
• an actuating mechanism mounted on the parking brake frame, for bringing the brake pad in contact with the guide rail,
• wherein the actuating mechanism comprises:
• a motor;
• an actuating member;
• and
• a conversion mechanism configured to convert movement of the motor into linear movement of the actuating member, the actuating member thereby bringing the brake pad in contact with the guide rail,
• wherein the conversion mechanism comprises:
• a cam mechanism having a driving profile, wherein the driving profile is at least partially configured to convert movement of the motor into linear movement of the actuating member, and
• wherein the driving profile comprises:
• a closing profile configured to position the actuating member before the brake pad comes in contact with the guide rail;
• and
• a tightening profile continuous with the closing profile and configured to position the actuating member when the brake pad is in contact with the guide rail,
• wherein a tightening profile slope defined as a linear position variation of the actuating member divided by a rotation angle variation of the driving profile when the actuating member is positioned by the tightening profile, is smaller than a closing profile slope defined as a linear position variation of the actuating member divided by a rotation angle variation of the driving profile, when the actuating member is positioned by the closing profile.