| 摘要 |
<p>The invention relates to an incrementally extendable telescopic mounting, the extension of which is determined by the position of a guide lug (6) rigidly connected to a female part (2) moving inside a guide system consisting of cam segments (5) arranged at the periphery of a male part (1), and by the relative positions of a single abutment (24) having a cylindrical arc shape with a trapezoidal cross-section, arranged on one of the telescopic elements (1). At the trapezoidal perimeter, the bearing surface (3) of the abutment (24) is successively supported on a circumferential series of cylindrical arcs of stepped hollow abutments (26) preferably having the same angular length, the same radial depth and the same trapezoidal perimeter on the other telescopic element (2), said cylindrical arcs defining hollow abutment structures integrated inside the respective telescopic elements thereof and preferably having the same outer and inner diameters, respectively, and having the axis of the device as a common center.</p> |
