The constantspeed transmission structure includes a constantspeed rotating unit and a power transmission unit which is arranged inside the secondary stationary seat.
The constantspeed rotating unit includes an inner rotating rod and an outer stationary pipe.
转动内杆具有穿出第二固定座外的传动段及穿出第一固定座外的套置段；
3
The utility model comprises a workbench, a first and a second fixing seats, a transmission mechanism of constantspeed, the output shaft and a top fixing workpiece unit.