Link Mechanism and Variable Displacement Compressor

Abstract

A linkage mechanism ( 40, 40 B, 40 C) includes a pair of arms ( 41, 41 ) extending from a rotating member ( 21 ) toward a tilting member ( 24 ), a pair of arms ( 43, 43 ) extending from the tilting member ( 25 ) toward the rotating member ( 21 ), and a link ( 45 ) inserted between the pair of arms ( 41, 41 ) of the rotating member and between the pair of arms ( 43, 43 ) of the tilting member.

1 . A linkage mechanism comprising 
 a rotating member fixed to a drive shaft and rotating integrally with the drive shaft;    a tilting member slidably attached to the drive shaft and being tiltable with respect to the drive shaft;    a pair of arms extending from the rotating member toward the tilting member and facing each other in a rotary torque transfer direction;    a pair of arms extending form the tilting member toward the rotating member and facing each other in the rotary torque transfer direction; and    a linkage member inserted between the pair of arms of the rotating member and between the pair of arms of the tilting member.    
   
   
       2 . The linkage mechanism according to  claim 1 , wherein one end of the linkage member is rotatably connected to the pair of arms of the rotating member by the first linking pin and the other end of the linkage member is rotatably-connected to the pair of arms of the tilting member by the second linking pin.  
   
   
       3 . The linkage mechanism according to  claim 1 , wherein a distance between the pair of arms of the rotating member and a distance between the pair of arms of the tilting member are formed in a same size.  
   
   
       4 . The linkage mechanism according to  claim 3 , wherein the first linking pin and the second linking pin have the same diameter and length.  
   
   
       5 . A variable displacement compressor comprising: 
 a drive shaft;    a rotating member fixed to the drive shaft and rotating integrally with the drive shaft;    a tilting member slidably attached to the drive shaft and being tiltable with respect to the drive shaft;    a linkage mechanism linking the rotating member and the tilting member and transferring rotary torque of the rotating member to the tilting member as allowing a tilt of the tilting member to change; and    a piston configured to reciprocate in a cylinder bores corresponding to rotary movement of the tilting member; wherein    the linkage mechanism includes:    a pair of arms extending from the rotating member toward the tilting member and facing each other in a rotary torque transfer direction;    a pair of arms extending form the tilting member toward the rotating member and facing each other in the rotary torque transfer direction; and    a linkage member inserted between the pair of arms of the rotating member and between the pair of arms of the tilting member.    
   
   
       6 . The variable displacement compressor according to  claim 5 , wherein one end of the linkage member is rotatably connected to the pair of arms of the rotating member by the first linking pin and the other end of the linkage member is rotatably connected to the pair of arms of the tilting member by the second linking pin.  
   
   
       7 . The variable displacement compressor according to  claim 5 , wherein a distance between the pair of arms of the rotating member and a distance between the pair of arms of the tilting member are formed in the same size.  
   
   
       8 . The variable displacement compressor according to  claim 7 , wherein the first linking pin and the second linking pin have the same diameter and length.  
   
   
       9 . A linkage mechanism comprising: 
 a rotating member fixed to a drive shaft and rotating integrally with the drive shaft;    a tilting member slidably attached to the drive shaft and being tiltable with respect to the drive shaft;    an arm extending from the rotating member toward the tilting member;    an arm extending form the tilting member toward the rotating member; and    a linkage member provided between the arm of the rotating member and the arm of the tilting member; wherein    a slit is provided to one of the arm of the rotating member and one end of the linkage member, the other of the arm of the rotating member and the end of the linkage member is inserted into the one, the arm of the rotating member and the one end of the linkage member are rotatably connected each other by a first linking pin; and    a maximum inclination angle of the linkage member relative to the arm of the rotating member corresponds to a maximum inclination angle of the first linking pin in a bearing clearance between the first linking pin and a bearing hole for the first linking pin.    
   
   
       10 . The linkage mechanism according to  claim 9 , wherein the first linking pin is fixed to a fixing hole provided in one of the arms or the rotating member and the linkage member and rotatably supported in the bearing hole provided in the other of the arms of the rotating member and the linkage member.  
   
   
       11 . The linkage mechanism according to  claim 9 , wherein the linking pin includes a reduced-diameter portion, at axial ends, where the diameter is reduced at a certain curvature, at a curvature that gradually increases, or at a curvature that increases in stages.  
   
   
       12 . The linkage mechanism according to  claim 9 , wherein the bearing hole includes an expanded-diameter portion, at axial ends, where the diameter is enlarged at a certain curvature, at a curvature that gradually increases, or at a curvature that increases in stages.  
   
   
       13 . The linkage mechanism according to  claim 9 , wherein 
 the slit is provided to the arm of the rotating member and the one end of the linkage member is inserted into the slit; and    the slit is provided to the arm of the tilting member and the other end of the linkage member inserted into the slit.    
   
   
       14 . The linkage mechanism according to  claim 13 , wherein a width of the slit in the rotating member and a width of the slit in the tilting member are formed in the same width.  
   
   
       15 . The linkage mechanism according to  claim 9 , wherein the first linking pin and the second linking pin have the same diameter and length.  
   
   
       16 . A linkage mechanism comprising: 
 a rotating member fixed to a drive shaft and rotating integrally with the drive shaft;    a tilting member slidably attached to the drive shaft and being tiltable with respect to the drive shaft;    an arm extending from the rotating member toward the tilting member;    an arm extending form the tilting member toward the rotating member; and    a linkage member provided between the arm of the rotating member and the arm of the tilting member; wherein    a slit is provided to one of the arm of the tilting member and the other end of the linkage member, the other of the arm of the tilting member and the other end of the linkage member inserted into the one, the arm of the tilting member and the other end of the linkage member are rotatably connected each other by a second linking pin; and    a maximum inclination angle of the linkage member relative to the arm of the tilting member corresponds to a maximum inclination angle of the second linking pin in a bearing clearance between the second linking pin and a hearing hole for the second linking pin.    
   
   
       17 . The linkage mechanism according to  claim 16 , wherein the second linking pin is fixed to a fixing hole provided to one of the arms of the tilting member and the linkage member and rotatably supported the bearing hole provided to the other of the arms of the tilting member and the linkage member.  
   
   
       18 . The linkage mechanism according to  claim 16 , wherein the linking pin includes a reduced-diameter portion, at axial ends, where the diameter is reduced at a certain curvature, at a curvature that gradually increases, or at a curvature that increases in stages.  
   
   
       19 . The linkage mechanism according to  claim 16 , wherein the hearing hole includes an expanded-diameter portion, at axial ends, where the diameter is enlarged at a certain curvature, at a curvature that gradually increases, or at a curvature that increases in stages.  
   
   
       20 . The linkage mechanism according to  claim 16 , wherein 
 the slit is provided to the arm of the rotating member and one end of the linkage member is inserted into the slit; and    the slit is provided to the arm of the tilting member and the other end of the linkage member inserted into the slit.    
   
   
       21 . The linkage mechanism according to  claim 20 , wherein a width of the slit in the rotating member and a width of the slit in the tilting member are formed in the same width.  
   
   
       22 . The linkage mechanism according to  claim 16 , wherein the first linking pin and the second linking pin have the same diameter and length.  
   
   
       23 . A variable displacement compressor comprising: 
 a drive shaft;    a rotating member fixed to the drive shaft and rotating integrally with the drive shaft;    a tilting member slidably attached to the drive shaft and being tiltable with respect to the drive shaft;    a linkage mechanism linking the rotating member and the tilting member and transferring rotary torque of the rotating member to the tilting member as allowing a tilt of the tilting member to change; and    a piston configured to reciprocate in a cylinder bores corresponding to rotary movement of the tilting member; wherein    the linkage mechanism includes:    an arm extending from the rotating member toward the tilting member;    an arm extending form the tilting member toward the rotating member; and    a linkage member provided between the arm of the rotating member and the arm of the tilting member; and wherein    a slit is provided to one of the arm of the rotating member and one end of the linkage member, the other of the arm of the rotating member and the one end of the linkage member into the one, the arm of the rotating member and the one end of the linkage member are rotatably connected each other by a first linking pin; and    a maximum inclination angle of the linkage member relative to the arm of the rotating member corresponds to a maximum inclination angle of the first linking pin in a bearing clearance between the first linking pin and a bearing hole for the first linking pin.    
   
   
       24 . The variable displacement compressor according to  claim 23 , wherein the first linking pin is fixed to a fixing hole provided in one of the arms of the rotating member and the linkage member and rotatably supported in the bearing hole provided to the other of the arms of the rotating member and the linkage member.  
   
   
       25 . The variable displacement compressor according to  claim 23 , wherein the linking pin includes a reduced-diameter portion, at axial ends, where the diameter is reduced at a certain curvature, at a curvature that gradually increases, or at a curvature that increases in stages.  
   
   
       26 . The variable displacement compressor according to  claim 23 , wherein the bearing hole includes an expanded-diameter portion, at axial ends, where the diameter is enlarged at a certain curvature, at a curvature that gradually increases, or in stages.  
   
   
       27 . The variable displacement compressor according to  claim 23 , wherein 
 the slit is provided to the arm of the rotating member and the one end of the linkage member is inserted into the slit; and    the slit is provided to the arm of the tilting member and the other end of the linkage member inserted into the slit.    
   
   
       28 . The variable displacement compressor according to  claim 27 , wherein a width of the slit in the rotating member and a width of the slit in the tilting member are formed in the same width.  
   
   
       29 . The variable displacement compressor according to  claim 23 , wherein the first linking pin and the second linking pin have the same diameter and length.  
   
   
       30 . A variable displacement compressor comprising: 
 a drive shaft;    a rotating member fixed to the drive shaft and rotating integrally with the drive shaft;    a tilting member slidably attached to the drive shaft and being tillable with respect to the drive shaft;    a linkage mechanism linking the rotating member and the tilting member and transferring rotary torque of the rotating member to the tilting member as allowing a tilt of the tilting member to change; and    a piston configured to reciprocate in a cylinder bores corresponding to rotary movement of the tilting member; wherein    the linkage mechanism includes:    an arm extending from the rotating member toward the tilting member;    an arm extending form the tilting member toward the rotating member; and    a linkage member provided between the arm of the rotating member and the arm of the tilting member; and wherein    a slit is provided to one of the arm of the tilting member and the other end of the linkage member, the other of the arm of the tilting member and the other end of the linkage member inserted into the one, the arm of the tilting member and the other end or the linkage member are rotatably connected each other by a second linking pin; and    a maximum inclination angle of the linkage member relative to the arm of the tilting member equals to a maximum inclination angle of the second linking pin in a bearing clearance between the second linking pin and a bearing hole for the second linking pin.    
   
   
       31 . The variable displacement compressor according to  claim 30 , wherein the second linking pin is fixed to a fixing hole provided to one of the arms of the tilting member and the linkage member and rotatably supported in the bearing hole provided to the other of the arms of the tilting member and the linkage member.  
   
   
       32 . The variable displacement compressor according to  claim 30 , wherein the linking pin includes a reduced-diameter portion, at axial ends, where the diameter is reduced at a certain curvature, at a curvature that gradually increases, or at a curvature that increases in stages.  
   
   
       33 . The variable displacement compressor according to  claim 30 , wherein the bearing hole includes an expanded-diameter portion, at axial ends, where the diameter is enlarged at a certain curvature, at a curvature that gradually increases, or in stages.  
   
   
       34 . The variable displacement compressor according to  claim 30 , wherein 
 the slit is provided to the arm of the rotating member and one end of the linkage member is inserted into the slit; and    the slit is provided to the arm of the tilting member and the other end of the linkage member inserted into the slit.    
   
   
       35 . The variable displacement compressor according to  claim 34 , wherein a width of the slit in the rotating member and a width of the slit in the tilting member are formed in same width.  
   
   
       36 . The variable displacement compressor according to  claim 30 , wherein the first linking pin and the second linking pin have the same diameter and length.