Abstract: A system for assembling/disassembling a windmill in a supporting tower, comprising a intermediate fixing structure with hydraulic supports for attachment, by pressure, to the tower; a main structure capable of being attached to the tower at various working positions by absorbing the diametral differences of the latter; two pivoting arms hinged to the main structure and capable of being positioned by hydraulic actuators; a secondary structure for hoisting tower segments, equipped with four cranes of a minor size for handling the main structure and the pivoting arms during hoisting/descent, and a counterbalancing group adjustable in height by means of capstans. The main structure and the intermediate structure include a detachable side for their withdrawal and separation from the tower during disassembly.

Abstract: A system for assembling/disassembling a blade in the rotating hub of a windmill is described, which system includes a set of structural components including: a hoisting structure capable of joining the tower and providing an element to support the load, with a variable geometry to adapt to the changes of diameter of the tower; a main structure that moves along the extension of the tower, provided with lifting points, also movable to control the position in the horizontal level; a clamp structure to grasp the blade and facilitate the subsequent change in the orientation of the blade; and means for lifting the main structure made up by traction cables attached at one end to the hoisting structure and at the other end to respective capstans which are external to the structure and located at ground level.

Abstract: A system for assembling/disassembling a windmill in a supporting tower, comprising a intermediate fixing structure with hydraulic supports for attachment, by pressure, to the tower; a main structure capable of being attached to the tower at various working positions by absorbing the diametral differences of the latter; two pivoting arms hinged to the main structure and capable of being positioned by hydraulic actuators; a secondary structure for hoisting tower segments, equipped with four cranes of a minor size for handling the main structure and the pivoting arms during hoisting/descent, and a counterbalancing group adjustable in height by means of capstans. The main structure and the intermediate structure include a detachable side for their withdrawal and separation from the tower during disassembly.