Pneumatic trolley for welding suspension arm of lorry-mounted crane

The utility model discloses a pneumatic trolley for welding a lazy arm of a lorry-mounted crane, and belongs to the field of lazy arm welding. The technical problem to be solved is to provide a pneumatic trolley which is simple in structure, convenient to use and capable of meeting production requirements and preventing welding deformation. The technical scheme for solving the technical problem isas follows: the technical scheme is adopted; a pneumatic trolley for lorry-mounted crane jib welding comprises a frame, wheels and a top plate, the frame is rectangular, the wheels are arranged on the two sides of the frame, the top plate is arranged on the frame, an air cylinder is arranged between the top plate and the frame, a cylinder barrel of the air cylinder is connected with the frame, and the top of a piston rod of the air cylinder is connected with the bottom of the top plate. The utility model can be widely applied to the field of lazy arm welding. 本实用新型公开了一种用于随车起重机吊臂焊接的气动小车，属于吊臂焊接领域；所要解决的技术问题是提供了一种结构简单，使用