Secondary clamping device for wheel

Disclosed is a secondary clamping device for a wheel. Two bearings and a spacing ring are closed in a base by a bearing end cover， a shaft sleeve is mounted on the bearings， a linear bearing and a gland are fixed on the shaft sleeve， a positioning pin is fixed at the top of the floating shaft， two ends of the spring A are respectively connected with the positioning pin and the linear bearing， and the positioning pin can move up and down under the action of the spring A. A pull rod is fixed on the gland， the outer wall of the floating column is connected with the inner hole of the shaft sleeve， two ends of the spring B are respectively connected with the gland and the floating column.