Rotary vane type vacuum pump rotor

Abstract

The present invention relates to a rotor of a rotary vane type vacuum pump capable of enhancing a durability, decreasing a processing and assembling time and a fabrication cost, increasing a productivity and decreasing a maintenance. In the rotor of a rotary vane type vacuum pump according to the present invention, the vane groove is extended to a support shaft portion which is a connection potion of the rotor body and the first and second rotors, and one end of the same includes a slot having an opened end, a sleeve which is a cylindrical bearing is inserted onto an outer portion of the support shaft portion which is a connection portion of the first and second rotors, and the first and second rotors are connected by a connection coupling which includes an engaging protrusion inserted into an opening end groove formed when the vane groove is formed and the sleeve is assembled.

What is claimed is:  
     
         1 . In a rotor of a rotary vane type vacuum pump which includes a rotor body having a vane groove, and first and second rotors each having a support shaft portion formed at both ends of the body and connected each other, a rotor of a rotary vane type vacuum pump in which the vane groove is extended to a support shaft portion which is a connection potion of the rotor body and the first and second rotors, and one end of the same includes a slot having an opened end, a sleeve which is a cylindrical bearing is inserted onto an outer portion of the support shaft portion which is a connection portion of the first and second rotors, and the first and second rotors are connected by a connection coupling which includes an engaging protrusion inserted into an opening end groove formed when the vane groove is formed and the sleeve is assembled.  
     
     
         2 . The rotor of  claim 1 , wherein said engaging protrusion formed at both ends of the connection coupling is formed in a X-shape and includes a plane surface.