| 摘要 |
<p>MOBILE CABLE WINCH In a portable cable winch which is adapted to haul in a load, the smooth shell of a motor-driven cable drum is provided with at least one conical surface having an angle of inclination corresponding to the angle of friction between the load-bearing cable and the cable drum. By means of a clamping disk driven in synchronism with the cable drum, the load-bearing cable which is pulled away from the smallerdiameter end portion of the conical surface and which is deflected by the clamping disk towards a cable storing means the cable has applied thereto a clamping force which, for the purpose of hauling in a load, acts in a rearward direction on the cable to be hauled in as a pulling force transmitted by the conical surface. In an embodiment in which the shell of the cable drum is subdivided into two conical surfaces having identical angles of inclination but being disposed on the axis of the cable drum in such a way as to extend into opposite directions, it is possible also to employ the cable winch as a hoisting gear for raising and lowering loads with the load-bearing cable, upon the direction of rotation of the cable drum being alternatingly guided onto the one or the other of the two conical surfaces such that the cable forms a plurality of turns wrapping the respective conical surface. In both cases the cable drum is operated as a pull-through drum so as to prevent the individual turns of the cable from being superimposed, with the result that it is possible to drive the drum independently of the length of the cable by applying a constant invariable torque thereto.</p> |
