Patent ID: 8844317
Filing Date: 2014-09-30
Classification: F01C,F04B,F04C,F16C,F25B

Abstract:
1. A compressor comprising: a cylinder block having a cylinder defining a compression space, and having a first thrust bearing surface at one side of the cylinder; a crank shaft having a second thrust bearing surface supported at the first thrust bearing surface, and performing a rotating motion with respect to the cylinder block, the crank shaft being coupled to a piston inserted into the cylinder to transfer a driving force for a reciprocating motion of the piston; a bearing member disposed between the first thrust bearing surface and the second thrust bearing surface; an elastic member disposed between the bearing member and the first thrust bearing surface or between the bearing member and the second thrust bearing surface to support the bearing member in a thrust direction; an extending portion protruded from the first thrust bearing surface in the thrust direction; and a block guide formed at the first thrust bearing surface to support the bearing member in a journal direction; wherein the bearing member comprises: an annular ball cage; a plurality of balls rotatably coupled to the ball cage with predetermined intervals in a circumferential direction; a first washer presented between the ball of the bearing member and the elastic member; and a second washer is present between the bearing member and the second thrust bearing surface; and wherein the elastic member is a leaf spring having a sinuous cross-sectional shape and an annular shape, wherein the extending portion is formed such that an upper surface of the extending portion is higher than a topmost curvature of the leaf spring when compressed and lower than the topmost curvature of the leaf spring when uncompressed, the extending portion and the block guide both are protruded from the first thrust bearing surface in the thrust direction with interposing the leaf spring therebetween; wherein the extending portion and the block guide have different heights; and wherein the extending portion is located below a lower surface of a first washer and has a height such that an upper surface thereof maintains a predetermined interval from a lower surface of the first washer.