Method and elevator drive with a brake device

B - Operations – Transporting – 66 – B

Patent

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Details

B66B 5/18 (2006.01) B66D 5/08 (2006.01)

Patent

CA 2635283

In this elevator drive with a brake device (1), compression springs (2, 3) act on brake levers, whereby brake linings (13, 16) generate a brake force on a brake drum (14). The more the brake linings (13, 16) wear due to abrasion, the smaller the distance (d) of the plunger (21) from the brake magnet housing (19) becomes. Should the plunger (21) come into contact with the brake magnet housing, the braking capacity of the brake linings (13, 16) is completely eliminated. So that this operating condition that is dangerous for elevator users cannot occur, a switch (27) is provided that detects a minimum distance (d). The switch (27) can be arranged on the plunger (21) of the brake magnet (4) and detect the minimum distance (d) to the brake magnet housing (19) or, in the case of a retrofit, the switch (27) can be arranged on the brake magnet rod (23) and, for example, detect the distance of the second joint (24) from the brake magnet housing (19), and at the minimum distance (d) the switch (27) switches.

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