Detachable screw rod

The utility model discloses a detachable screw rod, its characteristics are the screw rods that are formed by screw rod head and screw rod rear portion threaded connection, the drawbore is joined in marriage at its threaded connection position, is equipped with the round pin axle in the pinhole, the round pin axle by the split pin with screw rod head and the threaded connection after -fixing of screw rod rear portion, screw rod head one end is for being equipped with internal screw thread member connecting hole, the member connector of screw rod rear portion one end for being equipped with the external screw thread, member connector screw in member connecting hole is with being fixed it by round pin axle and split pin behind screw rod head and the screw rod rear portion threaded connection. Compared with the prior art, the utility model has the advantage of simple structure, easy dismounting, the good reliability, cost of maintenance is low, the installation with make conveniently, advantage that fittings life is high makes things convenient for amplitude changing device's maintenance greatly, improves security and economic nature that the hoist used.