The utility model discloses a hinged device, including connecting piece, hinged ear, bearing and round pin axle, be equipped with first mounting hole on the connecting piece, the last second mounting hole that is equipped with of hinged ear, first mounting hole is including just first via hole, first holding hole and the first hole of dodging of diameter grow of communicating with each other in proper order, be formed with first little step face between first holding hole and the first through -hole, first dodging is formed with first major progress face between hole and the first holding hole, the bearing is installed at first holding downtheholely, and one of them terminal surface of bearing inner race is kept out by first little step face, dodges the downthehole first draw -in groove that is equipped with first, and some first snap rings are put to first draw -in groove card, and another terminal surface of bearing inner race is kept out to first snap ring, the round pin axle passes second mounting hole, first via hole, bearing and the first hole of dodging. Better location can be carried out to the bearing to this structure, prevents bearing axial displacement, reduces the degree of difficulty of bearing installation, reduces the wearing and tearing in the bearing installation.