| 摘要 |
<p>The focus of this request is a device by which a lift fall is avoided even if the gearing or its winch shaft breaks down. The automatic braking device is activated by inertial force above a predetermined value due to overspeed rotation of the drum (33). The braking device is composed basically of the following elements: a flange (7) fitted into the pulley shaft (5) and set by a key (4); a synchronizer (10) of the locks motion fitted onto the flange (7), and one or more locks (13) connected to the synchronizer by connecting-rods (17). Connecting-rods (17) are two-hole plates, one hole being fitted onto the synchronizer (10) pin (11) and the other, onto the lock (13) pin (15); cotter pins (12) are placed to guarantee that connecting-rods (17) are indeed set to pins. Locks (13) have a hole (14) through which a bush (19) passes. A screw (20) is inserted into each bush (19) and threaded through the flange (7) hole (8), setting bushes (19) in it.</p> |
