Tipper tail -gate hydraulic pressure lock

The utility model discloses a tipper tail -gate hydraulic pressure lock, including little extension board, hydro -cylinder, round pin hook axle, hook plate and big extension board, the ramuscule boardsets up on the frid, hydro -cylinder one end sets up on little extension board to a connects through the round pin axle, and the hydro -cylinder other end is connected with the hook plate and is fixed with the split pin, big extension board respectively sets up one in hook plate both sides, the hook plate is connected on big extension board through round pin axle B, hook plate tail end and the round pin hook axle clearance fit of welding under the carriage tail -gate, round pin hook axle, hook plate, round pin axle B and split pin all are provided with two, and a hook plate, a round pin axleB and a split pin constitute a hook plate subassembly, and two hook plate subassemblies are all installed on big extension board, through drive plate realization synchronization action between the split pin of two hook plate t