Synchronous clamp

The utility model discloses a synchronous clamp. The synchronous clamp comprises a bottom plate, a flexible seat, inclined irons, V-shaped blocks, adjusting screw rods, a connecting plate and an oil cylinder, wherein sliding chutes are formed in the bottom plate and the inclined irons; the flexible seat and the sliding chute on the bottom plate are in slip connection; a flat key is arranged between the bottom plate and the flexible seat; two motion grooves are symmetrically formed in the flexible seat; a sliding chute is formed in each inclined iron and is in slip connection with the flexile seat; a notch is formed in the flexible seat; the V-shaped blocks are symmetrically arranged in the notch; the V-shaped blocks are arranged in the sliding chutes of the inclined irons and can slide; the inclined irons are connected with the connecting plate by the adjusting screw rods; adjusting nuts are arranged between the adjusting screw rods and the connecting plate; the oil cylinder is fixed in the connecting plate; the other end of the oil cylinder is connected with the flexible seat; a hexagon thin nut is arranged between the oil cylinder and the connecting plate. The synchronous clamp has the beneficial effects that the connection and positioning are stable, the transmission is convenient and rapid, the clamp is suitable for workpieces of different diameter series, the work efficiency is improved, and the use is convenient.