Optimized tongue piece action maintenance-free mechanical clamping device

The utility model relates to an optimized tongue piece action maintenance-free mechanical clamping device which comprises a block-shaped clamping body movably installed on a production line track. The clamping handle is in a vertical rod shape, and the middle of the clamping handle is movably connected with the clamping body; the upper tongue piece is disc-shaped and is movably connected with the lower end of the clamping handle; the upper tongue piece is of an eccentric structure, and the bottom surface of the upper tongue piece forms a certain angle with a vertical line in a free state; the shape and the size of the lower tongue piece are matched with those of the upper tongue piece; the lower tongue piece is fixedly installed on the clamp body, is located below the upper tongue piece and can be tightly attached to the upper tongue piece; when the upper end of the clamping handle swings back and forth, the upper tongue piece can be driven to move correspondingly, so that the upper tongue piece and the lower