Compressor

Abstract

A compressor that employs rollers to suppress resonance. The compressor includes a lug plate, which is connected to a rotary drive shaft by means of a rubber damper. The lug plate is arranged in a crank chamber. The lug plate has receptacles, which guide the pendulum movement of the rollers. When the rotary drive shaft rotates, the pendulum movement of each roller suppresses the resonance of the compressor.

What is claimed is:  
     
         1 . A compressor including a housing, a rotary drive shaft rotatably supported by the housing, and a compression mechanism accommodated in the housing, the compressor comprising: 
 a rotating body connected to the rotary drive shaft and arranged in the housing; and    a mass body supported by the rotating body at a position radially separated from an axis of the rotating body by a predetermined distance, wherein the mass body is supported in a manner permitting pendulum movement.    
     
     
         2 . The compressor according to  claim 1 , wherein the mass body is arranged in the housing.  
     
     
         3 . The compressor according to  claim 1 , wherein the compression mechanism includes a piston, which reciprocates when the rotary drive shaft rotates, and a swash plate, which converts the rotation of the rotary drive shaft to the reciprocation of the piston, and wherein the compressor further comprises a crank chamber, which accommodates the compression mechanism, and the mass body is arranged in the crank chamber.  
     
     
         4 . The compressor according to  claim 1 , wherein the rotating body has a guide, wherein the center of the guide is separated from the axis of the rotating body by the predetermined distance, wherein the guide has a curved guide surface, and wherein the mass body is a cylindrical member accommodated in the guide and rolls along the guide surface.  
     
     
         5 . The compressor according to  claim 4 , wherein the guide is one of a plurality of guides, wherein the guides are equally spaced in the circumferential direction of the rotating body.  
     
     
         6 . The compressor according to  claim 1 , further comprising a friction damper arranged between the rotating body and the rotary drive shaft.  
     
     
         7 . The compressor according to  claim 1 , wherein the compression mechanism is a variable displacement piston compression mechanism including a piston, which reciprocates when the rotary drive shaft rotates, and a swash plate, which converts the rotation of the rotary drive shaft to the reciprocation of the piston, wherein the rotating body is a lug plate, which supports the swash plate in a manner so that the swash plate inclines at an angle relative to the rotary drive shaft, wherein the angle determines the displacement of the compressor, and wherein the angle is altered to change said displacement.  
     
     
         8 . The compressor according to  claim 7 , wherein the guide is a recess formed in the lug plate.  
     
     
         9 . The compressor according to  claim 8 , wherein the recess is closed by a cover.  
     
     
         10 . The compressor according to  claim 1 , wherein the compression mechanism is a fixed displacement piston compression mechanism including a piston, which reciprocates when the rotary drive shaft rotates, and a swash plate, which converts the rotation of the rotary drive shaft to the reciprocation of the piston, and wherein the rotating body is the swash plate.  
     
     
         11 . The compressor according to  claim 10 , wherein the guide is a recess formed in the swash plate.  
     
     
         12 . The compressor according to  claim 11 , wherein the recess is closed by a cover.  
     
     
         13 . A compressor including a housing, a rotary drive shaft rotatably supported by the housing, and a compression mechanism accommodated in the housing, the compressor comprising: 
 a rotating body arranged in the housing and rotated integrally with the rotary drive shaft, wherein the rotating body includes a plurality of receptacles equally spaced in the circumferential direction of the rotating body, wherein the centers of the receptacles are separated from the axis of the rotating body by a first predetermined distance; and    a plurality of mass bodies respectively accommodated in the plurality of receptacles, wherein the mass bodies each perform a pendulum movement in the associated receptacle when the rotary drive shaft rotates.    
     
     
         14 . The compressor according to  claim 13 , wherein each of the mass bodies swings about an axis that is separated from the axis of the rotating body by a second predetermined distance.  
     
     
         15 . The compressor according to  claim 13 , wherein, for each mass bodies, the axis of pendulum movement is inclined relative to the axis of the rotating body.  
     
     
         16 . The compressor according to  claim 13 , wherein each of the mass bodies is a cylindrical rigid body roller, and each of the receptacles has a curved guide surface that contacts the associated cylindrical rigid body roller.  
     
     
         17 . The compressor according to  claim 13 , further comprising a plurality of pins, each connecting one of the mass bodies to the rotating body, wherein the mass bodies swing about the associated pins.