Elastic coupling for connecting worm shaft and motor shaft of electric steering system

The utility model belongs to the technical field of automobile manufacturing, and relates to an elastic coupling for connecting a worm shaft and a motor shaft of an electric steering system, which comprises a motor shaft coupling, a star-shaped elastic body and a worm shaft coupling. A plurality of tooth tables are arranged on the circumference of the star-shaped elastic body, the motor side boss and the worm side boss are meshed with gaps between two adjacent tooth tables in a staggered mode along the left side and the right side of the axial direction respectively, and concave arcs which are inward in the radial direction are arranged at the roots of the gaps. When the axes of the worm shaft and the motor shaft are not coaxial and have angular deviation, the radial error of the two axes can be made up through the elastic material of the star-shaped elastic body and the elastic deformation generated by the concave arc, and clamping stagnation or abnormal sound caused by abnormal abrasion of the rotating conn