Drive device

Abstract

[Object] To provide a drive device capable of increasing the drive precision of a movable member for generating power and capable of suppressing the generation of abraded particles. [Solving Means] A fluid machine ( 100 ) according to this embodiment has a structure in which a connecting rod as a movable member of a pump unit ( 20 ) is not connected to a circling shaft ( 13 ) of a motor unit ( 10 ) via a bearing but fixed to the circling shaft ( 13 ). In other words, the connection structure between the circling shaft ( 13 ) and the connecting rod is a structure using no bearings, and the integration, that is, the rigidity, of the circling shaft ( 13 ) and the connecting rod can be increased, which can increase the drive precision of the connecting rod. Further, since there are no sliding portions between the circling shaft ( 13 ) and the connecting rod, the generation of abraded particles can be suppressed and the reliability of the fluid machine ( 100 ) can be increased.

1 . A drive device, comprising:
 a rotating shaft;   a circling shaft provided to be eccentric with respect to an axial center of the rotating shaft; and   a movable member that is fixed to the circling shaft and generates power by using a circling movement of the circling shaft that circles by a rotation of the rotating shaft.   
     
     
         2 . The drive device according to  claim 1 , further comprising a bearing that is provided within the rotating shaft and rotatably supports the circling shaft. 
     
     
         3 . The drive device according to  claim 2 , further comprising a diaphragm mechanism that is driven by the movable member and gives power to a fluid, wherein the movable member is a connecting rod connected to the diaphragm mechanism. 
     
     
         4 . The drive device according to  claim 2 , further comprising a piston head that is driven by the movable member and gives power to a fluid,
 wherein the movable member is a piston rod connected to the piston head.   
     
     
         5 . The drive device according to  claim 1 , further comprising:
 a casing including
 an inlet of a fluid, 
 an outlet, and 
 an operating chamber that communicates with the inlet and the outlet and is provided with the movable member therein; and 
   a vane that partitions the operating chamber into an intake side and an exhaust side of the fluid together with the movable member in accordance with a movement of the movable member within the operating chamber.   
     
     
         6 . The drive device according to  claim 1 , wherein the circling shaft and the movable member are a member formed by integral molding. 
     
     
         7 . The drive device according to  claim 2 , wherein the circling shaft and the movable member are a member formed by integral molding. 
     
     
         8 . The drive device according to  claim 3 , wherein the circling shaft and the movable member are a member formed by integral molding. 
     
     
         9 . The drive device according to  claim 4 , wherein the circling shaft and the movable member are a member formed by integral molding. 
     
     
         10 . The drive device according to  claim 5 , wherein the circling shaft and the movable member are a member formed by integral molding.