Abstract: The device comprises at least one track (10) formed from an endless flexible belt (22) fitted on the inside with at least one row of studs (24) situated in the longitudinal direction of the endless belt and spaced at a constant distance apart and each delimited by two transverse faces and two lateral faces, two main wheels (12, 16) and support wheels (20A, 20B, 20C) on which the endless belt rolls, and a guidance element (50) placed between a main wheel (12) and an adjacent support wheel (20C) and comprising rollers (52) able to frame the lateral faces of the studs (24) in order to ensure guidance and stabilization of the endless belt in the region of the guidance element.

Abstract: A track drive device for all terrain vehicle comprises a frame (14) able to be mounted on the side of a chassis (C) of a vehicle and carrying two main wheels (38, 42) and support wheels (40A, B, 40E) around which is wound a track (12). The frame (14) comprises a rear part (16) able to be fixed to the chassis (C) of the vehicle and carrying one (38) of the main wheels, and a front part in the form of an approximately horizontal oscillating beam (18) carrying the other main wheel (42) and at least one (40D, 40E) of the support wheels and mounted pivoting about a first transverse pivot (20) located at a lower level. The device also comprises an approximately horizontal suspension arm (52) arranged above the oscillating beam (18), linked to the latter by a connecting rod (64) and mounted pivoting around a second transverse pivot (24) arranged at an upper level approximately at the height of the chassis.