Co-rotating scroll compressor

Abstract

A co-rotating scroll compressor includes a driving-side scroll member ( 7 ), a driven-side scroll member, a driving-side supporting member fixed to a distal end side of a driving-side wall ( 7 b ) in a rotation axis direction and rotated together with the driving-side scroll member ( 7 ), and a driven-side supporting member fixed to a distal end side of a driven-side wall in the rotation axis direction and rotated together with the driven-side scroll member. A driving-side fixing portion ( 7 f ) of the driving-side wall ( 7 b ) to which the driving-side supporting member is fixed is provided in a position close to a radially outside end portion ( 7 e ) of the driving-side wall ( 7 b ) and separated from the radially outside end portion ( 7 e ) in an inner circumferential direction of the driving-side wall ( 7 b ), and a driven-side fixing portion of the driven-side wall to which the driven-side supporting member is fixed is provided in a position close to a radially outside end portion of the driven-side wall and separated from the radially outside end portion in an inner circumferential direction of the driven-side wall.

1 . A co-rotating scroll compressor, comprising:
 a driving-side scroll member driven by a drive unit so as to rotate, and comprising a plurality of spiral driving-side walls provided about a center of a driving-side end plate at predetermined angular intervals;   a driven-side scroll member comprising spiral driven-side walls, the driven-side walls being provided about a center of a driven-side end plate at predetermined angular intervals and in a number corresponding to the driving-side walls, the driven-side walls being engaged with the corresponding driving-side walls so as to form a compression space;   a synchronous driving mechanism that transmits driving force from the driving-side scroll member to the driven-side scroll member so that the driving-side scroll member and the driven-side scroll member rotationally move in a same direction at a same angular velocity; and   a driving-side supporting member arranged across the driven-side end plate, fixed to free end sides of the driving-side walls in an arrangement direction, and rotated together with the driving-side scroll member, and/or a driven-side supporting member arranged across the driving-side end plate, fixed to a distal end side of the driven-side walls, and rotated together with the driven-side scroll member,   wherein a fixing portion of each of the driving-side walls to which the driving-side supporting member is fixed is provided in a position close to a radially outside end portion of the driving-side wall and separated from the radially outside end portion in an inner circumferential direction of the driving-side wall, and/or a fixing portion of each of the driven-side walls to which the driven-side supporting member is fixed is provided in a position close to a radially outside end portion of the driven-side wall and separated from the radially outside end portion in an inner circumferential direction of the driven-side wall.   
     
     
         2 . The co-rotating scroll compressor according to  claim 1 , wherein:
 an angle formed by a line connecting a center of the driving-side wall and the radially outside end portion to each other and a line connecting the center of the driving-side wall and a middle of the fixing portion to each other is 10° or more and 40° or less when the driving-side wall is seen in planar view; and/or   an angle formed by a line connecting a center of the driven-side wall and the radially outside end portion to each other and a line connecting the center of the driven-side wall and a middle of the fixing portion to each other is 10° or more and 40° or less when the driven-side wall is seen in planar view.   
     
     
         3 . The co-rotating scroll compressor according to  claim 1 , wherein:
 the driving-side scroll member comprises:
 a first driving-side scroll portion comprising a first driving-side end plate and a first driving-side wall, the first driving-side scroll portion being driven by the drive unit; 
 a second driving-side scroll member comprising a second driving-side end plate and a second driving-side wall; and 
 a wall fixing portion that performs fixing in a state in which distal ends of the first driving-side wall and the second driving-side wall in a rotation axis direction face each other; 
   the driven-side scroll member comprises:
 a first driven-side wall provided on one side surface of the driven-side end plate, the first driven-side wall being engaged with the first driving-side wall; and 
 a second driven-side wall provided on another side surface of the driven-side end plate, the second driven-side wall being engaged with the second driving-side wall; and 
   the driven-side supporting member comprises:
 a first supporting member arranged across the first driving-side end plate, fixed on a distal end side of the first driven-side wall in a rotation axis direction, and rotated together with the first driven-side wall; and 
 a second supporting member arranged across the second driving-side end plate, fixed to a distal end side of the second driven-side wall in a rotation axis direction, and rotated together with the second driven-side wall. 
   
     
     
         4 . The co-rotating scroll compressor according to  claim 2 , wherein:
 the driving-side scroll member comprises:
 a first driving-side scroll portion comprising a first driving-side end plate and a first driving-side wall, the first driving-side scroll portion being driven by the drive unit; 
 a second driving-side scroll member comprising a second driving-side end plate and a second driving-side wall; and 
 a wall fixing portion that performs fixing in a state in which distal ends of the first driving-side wall and the second driving-side wall in a rotation axis direction face each other; 
   the driven-side scroll member comprises:
 a first driven-side wall provided on one side surface of the driven-side end plate, the first driven-side wall being engaged with the first driving-side wall; and 
 a second driven-side wall provided on another side surface of the driven-side end plate, the second driven-side wall being engaged with the second driving-side wall; and 
   the driven-side supporting member comprises:
 a first supporting member arranged across the first driving-side end plate, fixed on a distal end side of the first driven-side wall in a rotation axis direction, and rotated together with the first driven-side wall; and 
 a second supporting member arranged across the second driving-side end plate, fixed to a distal end side of the second driven-side wall in a rotation axis direction, and rotated together with the second driven-side wall.