| 摘要 |
A clamping or braking device for lifts having a rotatable input element (15') which is directly or indirectly actuated by an actuating member (12') extending along the trajectory of the lift car (11') or the like. The input element (15') is directly or indirectly connected with a centrifugal governor (23'), which in response to the input element exceeding a predetermined angular speed connects the latter element with an actuating screw (29'), which thus is caused to rotate by the input element (15'). A flanged nut (32') is disposed on said element. The flank of the flanged nut (32') abuts against a spring means (34') acting against a brake-disc (33') which in braking situations directly or indirectly counteracts or arrests the rotation of the input element (15') and thus brakes the lift car or the like. In accordance with the invention, the flanged nut (32') is prevented from rotating by the provision in the device of a blocking device (40', 41') arranged to determine the length of travel of said flanged nut (32') along the actuating screw (29') before the flanged nut (32') is released and continued tightening of the spring mechanism (34') ceases.
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