Heavy-load and high-precision transmission mechanism applicable to metal sheet bending equipment

A heavy-load and high-precision transmission mechanism applicable to metal sheet bending equipment, the heavy-load and high-precision transmission mechanism comprising pressing arms, connecting rods, hinged supports, pressing arm lifting assemblies and pressing arm lifting driving assemblies, wherein

• the metal sheet bending equipment includes a rack and an upper cross beam, the rack includes two side plates symmetrically arranged on both sides of the rack,
• a number of the pressing arms is two, and the two pressing arms are symmetrically arranged on upper parts of both sides of the rack,
• a front end part of each pressing arm facing the upper cross beam is hinged at a top end of the connecting rod, and a bottom end of the connecting rod is hinged with the upper cross beam,
• an intermediate part of each pressing arm or a rear end part of each pressing arm away from the upper cross beam is hinged on the hinged support, and the hinged support is fixedly installed or integrally arranged on the rack,
• the rear end part or the intermediate part of each pressing arm is provided with a set of pressing arm lifting assemblies, each set of pressing arm lifting assemblies is connected with at least one set of pressing arm lifting driving assemblies, and each set of pressing arm lifting driving assemblies includes an all-electric servo motor, and
• the pressing arm lifting assemblies are rotatable or slidable driven by a corresponding pressing arm lifting driving assembly, thereby driving the pressing arm to swing up and down around the hinged support and driving the upper cross beam to ascend and descend in height,
• wherein each set of pressing arm lifting assemblies includes a pressing rod capable of swinging, and a top end of the pressing rod is hinged with the rear end part or the intermediate part of the pressing arm,
• wherein the intermediate part of each pressing arm is hinged on the rack through the hinged support correspondingly, and the top end of the pressing rod is hinged with the rear end part of the pressing arm, each set of pressing arm lifting driving assemblies includes the all-electric servo motor, a screw rod, and a sliding block, wherein the all-electric servo motor is configured to drive the screw rod to rotate, the sliding block is threadedly sleeved on the screw rod, and the sliding block is hinged at the bottom end of the pressing rod,
• wherein a top part of the rack away from the upper cross beam is provided with a sliding track, the sliding block is slidably installed on the sliding track, wherein a sliding pair is formed between the sliding block and the sliding track, and a direction of the screw rod is consistent with that of the sliding track.