Coiling device for automatically detecting expansion and contraction of core shaft

The utility model discloses a coiling device for automatically detecting expansion and contraction of a core shaft. The coiling device comprises a driving motor (1), a core shaft expansion-contraction hydraulic device (2), a speed changing box (3) and a coiled core shaft body (4), and is characterized in that an automatic core shaft expansion-contraction detecting device is arranged on the rear side of the coiled core shaft body (4). The real-time monitoring on the core shaft expansion-contraction state is achieved through the automatic core shaft expansion-contraction detecting device, once the phenomenon of core shaft contraction occurs in the coiling process, the automatic core shaft expansion-contraction detecting device can find the phenomenon timely to stop the system, and the problem that coils cannot be discharged in the coiling process due to the fact that the core shaft is contracted is avoided.