Pressing mechanism with eccentric wheel set gravity center

The utility model discloses a wheel set gravity center eccentric hold-down mechanism. The wheel set gravity center eccentric hold-down mechanism comprises a C-shaped sliding table, a screw hold-down device, a hold-down block and a fourth driving device, the C-shaped sliding table is arranged on the conveying vehicle bottom plate and can move in the advancing and retreating direction of the conveying vehicle bottom plate. The screw pressing device is arranged on the top of the C-shaped sliding table, and the action end of the screw pressing device is arranged downwards. The pressing block is fixed to the bottom of the action end of the screw pressing device. The fourth driving device is fixed to the top of the C-shaped sliding table and is in transmission connection with the screw pressing device. Wherein a V-shaped supporting block used in cooperation with the pressing block is arranged on the conveying vehicle bottom plate, V-shaped grooves are formed in the upper surface of the V-shaped supporting block and