High-strength hard shaft driving system for ballast bed tamping device

The utility model provides a high-strength hard shaft driving system for a ballast bed tamping device, belonging to general machinery. The system is used for tamping slag stones of a ballast bed, which are loosely vibrated by a train, so that the enough bearing capacity of the ballast bed can be guaranteed, and the flatness of a steel rail can be guaranteed. The granite macadam medium such as the slag stones need very large unit power equivalent weight due to the specific characteristic, and a flexible shaft driving system of the old conventional equipment is very easily damaged under the high-rotating speed and strong-vibration impact due to the weak strength. The system is characterized in that a long flexible shaft is replaced by the hard shaft, two ends of the rigid hard shaft 3 are respectively provided with a special flexible coupling 2, one end of the rigid hard shaft 3 is connected with power by a clutch cup shaft 4, the other end of the rigid hard shaft 3 is connected with a vibration body 1 of an ex