Resumen
Joint system for mobile grid structures for connecting rod ends (4) characterized in that it comprises: - a completely solid spherical core (1) configured to distribute axial loads to the bars; and - a spherical outer shell (2), which surrounds the spherical core (1), formed from the union of two spherical caps threaded together, provided with radial holes (3) configured to accommodate and retain connection sleeves (5) attached to the bars (4) that make up the structure; wherein the connection bushing (5) is formed by a threaded cylindrical sector (6) integrally mounted to the ends of the bars (4), a conical part (7) and a small spherical bushing (8), where said small spherical bushing (8) is mounted and retained between the spherical core (1) and the outer shell (2); and where the lower section of the conical part (7), whose axis is concentric to the center of the spherical core, is smaller in diameter than the radial holes (3) comprising a gap (9) between said conical part (7) and the radial holes (3). (Machine-translation by Google Translate, not legally binding)