Automatic ballastless track slab void detection structure

The utility model belongs to the technical field of track detection, and particularly relates to an automatic ballastless track slab void detection structure, which comprises an acceleration sensor, and is characterized in that a mounting seat is arranged at the top end of the acceleration sensor, a fixed base is arranged at the bottom end of the mounting seat, and a compression spring is arranged at the top end of the mounting seat; a supporting rod is arranged in the compression spring, a connecting support is arranged at the top end of the supporting rod, a fastening bolt is arranged at the bottom end of the connecting support, a threaded rod is arranged at the top end of the fastening bolt, an auxiliary supporting frame is arranged on the inner side of the connecting support, and a telescopic rod is arranged at the top end of the connecting support. An anti-skid handle is arranged on the outer side of the top end of the telescopic rod, and a fastening rotating block is arranged on one side of the telescop