Patent ID: 6146107
Filing Date: 2000-11-14
Classification: F04B

Abstract:
A structure for holding a cam plate in a compressor having a lug plate supported on a compressor drive shaft for integral rotation therewith, said cam plate being coupled to the lug plate by hinge means to integrally rotate with the drive shaft and to tilt with respect to the axis of the drive shaft, said cam plate being coupled to a piston to convert rotation of the drive shaft into linear reciprocating movement of the piston within a cylinder to compress a compressible gas supplied to the cylinder from an external gas circuit and to discharge the compressed gas outward from the cylinder during piston compression movement, said lug plate having a surface facing towards said cam plate, said hinge means comprising:a first guide pin and a second guide pin respectively projecting from said cam plate to said lug plate, said first and second guide pins being aligned with each other in annularly spaced apart relation in the direction of said rotation of the drive shaft with said first guide pin being in a leading position, and said second guide pin being in a following position with respect to the other guide pin;said lug plate having respective first and second support arms projecting substantially from said lug plate surface and being in similar annularly spaced apart relation in the direction of said rotation of the drive shaft for respective engagement by said cam plate first and second guide pins, said first support arm having a first guide hole receiving said first guide pin in engagement therewith on a surface portion of the first guide hole which is nearest to said drive plate surface, and said second support arm having a second guide hole receiving said second guide pin in engagement therewith on a surface portion of the second guide hole which is annularly displaced an angular distance towards the following direction of said rotation of the drive shaft from a surface portion of the second guide hole which is nearest to said lug plate surface; andsaid surface portion of the first guide hole which is nearest to said lug plate surface being located a greater distance away from said lug plate surface than is said second guide hole surface portion which is nearest to said lug plate surface.