Abstract
A climbing structure (100) comprising at least two holding devices (1) for securing the structure (100) to a tower (201) of a wind turbine. Each holding device (1) comprises three pushers, a central one (5.3) and side pushers (5.1, 5.2), with at least a respective supporting surface (3.1, 3.2, 3.3), the pushers being configured to press the tower (201) at a certain height on three angularly equally distributed areas. Each holding device (1) also comprises a main body (4) and two side arms (6.1, 6.2) cooperating with said main body (4) and comprising a respective side pusher (5.1, 5.2), the central pusher (5.3) being associated with the main body (4). Likewise, the main body (4) of each holding device (1) comprises two inclined side guide housings (8.1, 8.2), the central pusher (5.3) being arranged between both side arms (6.1, 6.2). Each holding device (1) comprises actuating means for moving the side arms (6.1, 6.2) with respect to the main body (4) guided in the corresponding side guide housing (8.1, 8.2), such that the respective holding device (1) can be coupled to towers (201) of different diameters.