Single-side movable portal frame for three-way forklift

The utility model relates to the technical field of forklifts, and particularly discloses a unilateral movable portal frame for a three-way forklift, which comprises a portal frame main body, a main shaft and a driving piece, gear assemblies are arranged at the upper end and the lower end of the portal frame main body, and the upper end and the lower end of the portal frame main body are meshed and connected with a forklift main body through the gear assemblies. When the gear assemblies rotate, the upper end and the lower end of the portal frame body can be driven to move in the transverse direction of the forklift body, it can be guaranteed that the upper end and the lower end of the portal frame body are evenly stressed, and the portal frame body is prevented from deforming; and the main shaft is fixed on the portal frame main body in a multi-point fixing manner, so that the main shaft cannot shake in the rotating process, and the stability of transverse movement is ensured. 本实用新型涉及叉车的技术领域，并具体公开一种用于三向叉车的单侧可