Horizontal four-column hydraulic press with high-low speed conversion function

The horizontal type four-column hydraulic machine comprises a machine body base, a workbench and a cross beam are located at the left end and the right end of the machine body base respectively, the four corners of the workbench and the four corners of the cross beam are connected through stand columns respectively, a sliding block is arranged between the workbench and the cross beam, and the center of the right end of the sliding block is connected with a piston rod of a main cylinder. The four corners of the sliding block are each provided with a guide sleeve, and the four stand columns penetrate through the corresponding guide sleeves respectively. A wheel support is fixed to the middle of the bottom face of the sliding block, two support lug plates which are parallel to each other and extend downwards are welded to the lower end face of the wheel support, a wheel shaft is installed between the two support lug plates, the two ends of the wheel shaft are supported in the support lug plates through bearings