Patent ID: 8622689
Filing Date: 2014-01-07
Classification: F04C

Abstract:
1. A rotor drive mechanism capable of causing an external screw type rotor of a uniaxial eccentric screw pump to rotate and carry out a revolution movement, the uniaxial eccentric screw pump being configured such that the external screw type rotor is attached to an inner hole of an internal screw type stator; and causing the external screw type rotor to be driven by a rotation speed control driving portion such that the external screw type rotor rotates and to be driven by a revolution speed control driving portion such that the external screw type rotor carries out the revolution movement, the rotor drive mechanism comprising: a rotation shaft configured to have a central axis at a certain position and be rotatably supported; and a revolution shaft configured to be supported so as to be able to revolve about a certain central position and rotate and to have one end portion coupled to the rotation shaft via a power transmission portion and the other end portion coupled to the external screw type rotor; wherein