Laser cutting machine tool body table top lifting mechanism

A table board lifting mechanism of a laser cutting machine tool body belongs to the technical field of lifting of laser cutting table boards and comprises a machine tool body, a table board is installed above the machine tool body through lifting devices at the four corners, each lifting device comprises a machine tool body fixing frame fixedly installed on the machine tool body, a vertical oil cylinder is installed on each machine tool body fixing frame, and a piston rod is arranged in each oil cylinder. The top of the piston rod is connected with the table board through a universal coupling,and the bed body fixing frame is connected with the table board through a vertical sliding rail device. Power is provided through the oil cylinder, the sliding rail device conducts guiding, lifting of the table board relative to the machine body is achieved, the universal coupling installed at the top of the piston rod can effectively and automatically eliminate errors and internal stress in themechanical installation pr