Shaft coupling and have its compressor

The utility model provides a shaft coupling and have its compressor. Wherein, the shaft coupling includes: a half -coupling and the 2nd half -coupling, a half -coupling is connected with the driving shaft, and the 2nd half -coupling is connected with the driven shaft, and a half -coupling and the cooperation of the 2nd half -coupling are so that the driven shaft rotates along with the driving shaft, and a half -coupling and the 2nd half -coupling are made by metal material, first safe key sets up between driving shaft and a half -coupling, and a half -coupling can rotate along with the drivingshaft under the effect of first safe key, is greater than predeterminedly first when blocking power the most greatly when the shearing force that first safe key bore, and first safe bond energy enough quilt is blocked so that a half -coupling and driving shaft disconnect. Use the technical scheme of the utility model can solve the easy problem of damaging of shaft coupling among the prior art effectively. 本实用新型提供了种联轴器及具有