| 摘要 |
<p>The invention relates to a hydraulically driven planetary winch used in hoisting installations, in particular in the hoisting mechanism of mobile cranes. According to the invention, the hydraulically driven planetary winch to be used in hoisting installations maintains the load in the vertical plane by the planetary reduction gear (A) driven by the hydraulic motor (MH) having two stages between which there are mounted a normally closed brake (B) and a one-way coupling (10), the free direction thereof corresponding to the cable winding on the cable reel, and to the load hoisting, respectively, said coupling being mounted coaxially with the brake axle (B), between the sun pinion (5) of the second stage of the reduction gear (A) and the brake (B), as well as a cable reel on which the load hoisting cable is wound/unwound. The opening of the brake (B) is performed only upon the control corresponding to the cable unwinding direction and the load lowering, respectively, as a consequence of the pressure of the oil in the driving circuit of the hydraulic motor (MH).</p> |
