| 摘要 |
An apparatus for braking an elevator includes a storage tank (1) supplying a pressure medium (1.1) under low pressure through a line (2) to a brake cylinder (5) of a brake unit (BE). An adjustable restrictor (3) and a valve (4) are connected in series in the line (2) A piston (10) slides in the brake cylinder (5) betwee n actuated and unactuated positions and has an attached brake lining (6) for engaging a traction sheave (8) of the elevator. A yoke (9) is attached to the brake cylinder (5) and piston pin (11) attached to the piston (10) slides in the yoke. A compression sprin g (12) acts between the yoke (9) and the piston (10) to move the piston to the actuated position and generate the required force for the braking and holding of the traction disc (8). The valve (4) is opened to release the pressure medium (1.1) front the brake cylinder (5) and allow the spring (12) to move the piston (10) to the actuat ed position. The piston (10) is returned to the unactuated position by means of a resetting nut (18) cooperating with the piston pin (11) and the yoke (9). Th e valve (4) is opened to refill the brake cylinder (5) with the pressure medium (1.1 ) and subsequently the valve is closed and the resetting nut (18) is released to maintain the piston (10) in the unactuated position.
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