Co-rotating scroll compressor

Abstract

This co-rotating scroll compressor is provided with: a first side plate (27) which is arranged on the side of a drive-side rotational axis direction (CL1) with respect to a drive-side scroll member (70) and a driven-side scroll member (90), a second side plate (30) fixed at a predetermined gap in the direction of the drive-side rotational axis (CL1) with respect to the first side plate (27), and a center plate (20) arranged between the first side plate (27) and the second side plate (30). The first side plate (27) is fixed to the driven-side scroll member (90), and the center plate (20) is fixed to the drive-side scroll member (70). A synchronization drive mechanism equipped with a crank pin (15) is disposed between the first side plate (27) and second side plate (30) and the center plate (20).

1 . A co-rotating scroll compressor comprising:
 a drive-side scroll member driven to rotate around a rotational axis by a drive unit and having a spiral drive-side wall body disposed on a drive-side end plate;   a driven-side scroll member in which a spiral driven-side wall body corresponding to the drive-side wall body is disposed on a driven-side end plate and the driven-side wall body meshes with the drive-side wall body to form a compression space;   a synchronization drive mechanism transmitting a drive force of the drive unit to the driven-side scroll member such that the drive-side scroll member and the driven-side scroll member perform rotating motions in the same direction and at the same angular velocity;   a first side plate disposed on the rotational axis direction side with respect to the drive-side scroll member and the driven-side scroll member;   a second side plate fixed at a predetermined gap in the rotational axis direction with respect to the first side plate; and   a center plate disposed between the first side plate and the second side plate, wherein   the first side plate is fixed to one of the drive-side scroll member and the driven-side scroll member,   the center plate is fixed to the other of the drive-side scroll member and the driven-side scroll member, and   the synchronization drive mechanism is provided between the first and second side plates and the center plate.   
     
     
         2 . The co-rotating scroll compressor according to  claim 1 , wherein
 the synchronization drive mechanism is provided with a crank pin having an eccentric shaft portion having an eccentric axis which is eccentric to a central axis of a central cylindrical portion and a crank pin end portion rolling bearing provided between both end portions of the eccentric shaft portion and the first and second side plates, and   an urging member urging an inner ring of the crank pin end portion rolling bearing toward a leading edge of the eccentric shaft portion in the eccentric axis direction is provided between the inner ring and the eccentric shaft portion.   
     
     
         3 . The co-rotating scroll compressor according to  claim 1 , wherein
 the synchronization drive mechanism is provided with a crank pin having an eccentric shaft portion having an eccentric axis which is eccentric to a central axis of a central cylindrical portion and a crank pin end portion rolling bearing provided between both end portions of the eccentric shaft portion and the first and second side plates, and   a preload is applied to the crank pin end portion rolling bearing in the eccentric axis direction by a gap between the first side plate and the second side plate.   
     
     
         4 . The co-rotating scroll compressor according to  claim 1 , wherein
 the synchronization drive mechanism is provided with a crank pin having an eccentric shaft portion having an eccentric axis which is eccentric to a central axis of a central cylindrical portion and a crank pin end portion rolling bearing provided between both end portions of the eccentric shaft portion and the first and second side plates, and   an elastic body is provided between an inner peripheral surface of an inner ring of the crank pin end portion rolling bearing and an outer peripheral surface of the eccentric shaft portion.   
     
     
         5 . The co-rotating scroll compressor according to  claim 1 , wherein among a fixing portion of the first side plate which is fixed to one of the drive-side scroll member and the driven-side scroll member and a fixing portion of the center plate which is fixed to the other of the drive-side scroll member and the driven-side scroll member, the fixing portion positioned on a radial inner side of a center of the scroll member has a structure in which a resin portion is interposed, and the fixing portion positioned on a radial outer side of the center of the scroll member has a structure using a metal portion without resin portion interposition. 
     
     
         6 . The co-rotating scroll compressor according to  claim 1 , wherein a peripheral wall portion surrounding an outer peripheral side of the center plate is provided between the first side plate and the second side plate. 
     
     
         7 . The co-rotating scroll compressor according to  claim 6 , further comprising
 a drive shaft portion rotating around the rotational axis and connected between the drive-side end plate and the drive unit, wherein   the center plate is fixed to the drive shaft portion,   a hole portion for the first side plate through which the drive shaft portion passes is formed in the first side plate,   a hole portion for the second side plate through which the drive shaft portion passes is formed in the second side plate, and   a first seal member is provided between the hole portion for the first side plate and the drive shaft portion and/or between the hole portion for the second side plate and the drive shaft portion.   
     
     
         8 . The co-rotating scroll compressor according to  claim 6 , further comprising
 a drive shaft portion rotating around the rotational axis and connected between the drive-side end plate and the drive unit, wherein   the center plate is fixed to the drive shaft portion,   a hole portion for the first side plate through which the drive shaft portion passes is formed in the first side plate,   a hole portion for the second side plate through which the drive shaft portion passes is formed in the second side plate, and   a second seal member is provided between the first side plate and the center plate and/or between the second side plate and the center plate.   
     
     
         9 . The co-rotating scroll compressor according to  claim 6 , wherein
 the first side plate is fixed to the drive-side wall body on an outer peripheral side,   the second side plate is fixed to the first side plate,   the drive unit is connected to a rotation center of the second side plate,   the center plate is fixed to a driven shaft portion connected to a rotation center of the driven-side end plate,   a hole portion for the first side plate through which the driven shaft portion passes is formed in the first side plate, and   a rotation center region of the second side plate is closed by a wall portion.   
     
     
         10 . The co-rotating scroll compressor according to  claim 1 , wherein the synchronization drive mechanism is provided with a round bar-shaped pin provided between the first and second side plates and the center plate and a ring guiding the pin by an inner peripheral surface of the ring abutting against an outer periphery of the pin. 
     
     
         11 . The co-rotating scroll compressor according to  claim 10 , wherein
 the ring is a rolling bearing provided on the center plate, and   both ends of the pin are press-fitted to the first side plate and the second side plate and a longitudinal central portion of the pin abuts against an inner peripheral surface of the rolling bearing.   
     
     
         12 . The co-rotating scroll compressor according to  claim 10 , wherein
 the ring is a rolling bearing provided on the center plate, and   one end of the pin is press-fitted to one of the first side plate and the second side plate, the other end of the pin is fixed to the other of the first side plate and the second side plate via an elastic body, and a longitudinal central portion of the pin abuts against an inner peripheral surface of the rolling bearing.   
     
     
         13 . The co-rotating scroll compressor according to  claim 10 , wherein
 three or more synchronization drive mechanisms are provided to be spaced apart in a circumferential direction of the rotational axis,   in two of the synchronization drive mechanisms, the ring is a rolling bearing provided on the center plate, both ends of the pin are press-fitted to the first side plate and the second side plate, and a longitudinal central portion of the pin abuts against an inner peripheral surface of the rolling bearing, and   in the other synchronization drive mechanism, the ring is a rolling bearing provided on the center plate, one end of the pin is press-fitted to one of the first side plate and the second side plate, the other end of the pin is fixed to the other of the first side plate and the second side plate via an elastic body, and a longitudinal central portion of the pin abuts against an inner peripheral surface of the rolling bearing.   
     
     
         14 . The co-rotating scroll compressor according to  claim 10 , wherein
 the ring is a rolling bearing provided on each of the first side plate and the second side plate, and   a longitudinal central portion of the pin is press-fitted to the center plate and both ends of the pin abut against an inner peripheral surface of the rolling bearing.   
     
     
         15 . The co-rotating scroll compressor according to  claim 11 , wherein
 the ring is a slide bearing instead of the rolling bearing.   
     
     
         16 . The co-rotating scroll compressor according to  claim 1 , wherein
 the synchronization drive mechanism is provided with a crank pin having an eccentric shaft portion having an eccentric axis which is eccentric to a central axis of a central cylindrical portion, a first crank pin end portion rolling bearing provided between one end of the eccentric shaft portion and the first side plate, a second crank pin end portion rolling bearing provided between the other end of the eccentric shaft portion and the second side plate, and a cylindrical portion rolling bearing provided between the cylindrical portion and the center plate, and   an elastic body is provided in at least one of spaces between an outer ring of the first crank pin end portion rolling bearing and the first side plate, between an outer ring of the second crank pin end portion rolling bearing and the second side plate, and between an outer ring of the cylindrical portion rolling bearing and the center plate or in at least one of spaces between an inner ring of the first crank pin end portion rolling bearing and the one end of the eccentric shaft portion, between an inner ring of the second crank pin end portion rolling bearing and the other end of the eccentric shaft portion, and between an inner ring of the cylindrical portion rolling bearing and the cylindrical portion.   
     
     
         17 . The co-rotating scroll compressor according to  claim 16 , wherein
 the elastic body is provided between the outer ring of the cylindrical portion rolling bearing and the center plate,   the outer ring of the first crank pin end portion rolling bearing is press-fitted to the first side plate, and   the outer ring of the second crank pin end portion rolling bearing is press-fitted to the second side plate.   
     
     
         18 . The co-rotating scroll compressor according to  claim 16 , wherein
 an insertion hole into which the eccentric shaft portion is inserted is formed in the cylindrical portion.   
     
     
         19 . The co-rotating scroll compressor according to  claim 1 , wherein
 the synchronization drive mechanism is provided with a crank pin having an eccentric shaft portion having an eccentric axis which is eccentric to a central axis of a central cylindrical portion, and   an insertion hole into which the eccentric shaft portion is inserted is formed in the cylindrical portion.