Scroll compressor

Abstract

A scroll compressor is disclosed. The scroll compressor includes a first scroll and a second scroll engaged with the first scroll and configured to perform an orbiting movement. The second scroll forms a compression chamber between the first scroll and the second scroll. The scroll compressor includes a frame positioned opposite the first scroll with the second scroll interposed therebetween. The scroll compressor also includes an oldham ring that has an annular ring portion and a key portion protruding from the ring portion. The key portion is slidably coupled to a key groove provided in the frame or in the second scroll to allow the second scroll to perform an orbiting movement with respect to the first scroll. The scroll compressor also include a reinforcing member coupled to the key portion. The reinforcing member is positioned between the key groove and the key portion.

What is claimed is: 
     
         1 . A scroll compressor, comprising:
 a first scroll;   a second scroll engaged with the first scroll and configured to perform an orbiting movement, the second scroll forming a compression chamber between the first scroll and the second scroll;   an oldham ring including an annular ring portion and a key portion protruding axially from the ring portion, the key portion being slidably coupled to a key groove provided in the second scroll to allow the second scroll to perform an orbiting movement with respect to the first scroll; and   a reinforcing member coupled to the key portion of the oldham ring, the reinforcing member being positioned between the key groove of the second scroll and the key portion of the oldham ring.   
     
     
         2 . The scroll compressor of  claim 1 , wherein the reinforcing member comprises:
 a plurality of reinforcing surfaces facing sliding side surfaces of the key portion;   a connecting surface connecting the plurality of reinforcing surfaces, the connecting surface facing an outer circumferential side surface of the key portion; and   a plurality of fixing surfaces extending from the respective reinforcing surfaces towards each other adjacent an inner circumferential side surface of the key portion, the fixing surfaces facing the inner circumferential side surface of the key portion.   
     
     
         3 . The scroll compressor of  claim 2 , further including:
 a release preventing groove extending radially from the inner circumferential side surface to a predetermined depth, and   release preventing portions extending from the fixing surfaces into the release preventing groove.   
     
     
         4 . The scroll compressor of  claim 2 , further including:
 a release preventing groove extending radially from the inner circumferential side surface to a predetermined depth, the release preventing groove including one end open in an axial direction, and   release preventing portions extending from the fixing surfaces into the release preventing groove.   
     
     
         5 . The scroll compressor of  claim 2 , further including
 a release preventing groove extending radially from the inner circumferential side surface to a predetermined depth, the release preventing groove extending to both the sliding surfaces of the key portion,   wherein both the fixing surfaces of the reinforcing member are inserted into the release preventing groove.   
     
     
         6 . The scroll compressor of  claim 2 , further including
 release preventing grooves having a predetermined depth formed on both circumferential side surfaces of the key portion, and   release preventing portions protruding from both reinforcing surfaces of the reinforcing member into the release preventing grooves.   
     
     
         7 . The scroll compressor of  claim 1 , wherein the reinforcing member comprises a first reinforcing member provided to face one sliding surface of the key portion and a second reinforcing member provided to face the other sliding surface of the key portion. 
     
     
         8 . The scroll compressor of  claim 7 , further including
 release preventing grooves having predetermined depths formed respectively on an outer circumference side surface and on an inner circumferential side surface of the key portion, respectively, and   the first reinforcing member and the second reinforcing member respectively comprising:
 reinforcing surfaces facing both sliding side surfaces of the key portion, 
 fixing surfaces extending from both ends of the reinforcing surfaces, and 
 release preventing portions extending from the fixing surfaces into the release preventing grooves. 
   
     
     
         9 . The scroll compressor of  claim 1 , wherein the reinforcing member comprises:
 a connecting surface facing one axial side surface of the key portion; and   a plurality of fixing surfaces respectively bent at both ends of the connecting surface to face both circumferential side surfaces of the key portion.   
     
     
         10 . The scroll compressor of  claim 1 , wherein an oil storage unit is provided at one of the oldham ring or a member to which the oldham ring is coupled. 
     
     
         11 . The scroll compressor of  claim 10 , wherein the key portion is one of a plurality of key portions formed at intervals along a circumferential direction on the ring portion to be slidably inserted into key grooves provided in the frame or in the second scroll, and wherein the oil storage unit comprises a recess in the key portion. 
     
     
         12 . The scroll compressor of  claim 11 , wherein the key portion includes a key root portion and a protrusion extending axially from the key root portion and the oil storage unit is formed in the protrusion. 
     
     
         13 . The scroll compressor of  claim 10 , wherein the oil storage unit comprises an oil storage member capable of containing oil. 
     
     
         14 . The scroll compressor of  claim 10 , wherein the reinforcing member includes a communication hole facing the oil storage unit. 
     
     
         15 . A motor-driven compressor, comprising:
 a first scroll;   a second scroll that forms a compression chamber between the first scroll and the second scroll while being engaged with the first scroll to perform an orbiting movement;   a frame fixed in a radial direction on an opposite side of the first scroll with the second scroll interposed therebetween to support the second scroll in an axial direction; and   an oldham ring coupled between the second scroll and the frame or between the second scroll and the first scroll to suppress the rotation of the second scroll,   wherein an oil storage unit is provided at one of the oldham ring or a member to which the oldham ring is coupled.   
     
     
         16 . The motor-driven compressor of  claim 15 , wherein the oldham ring comprises:
 an annular ring portion; and   key portions formed at intervals along a circumferential direction on the ring portion to be slidably inserted into key grooves provided in the frame or in the second scroll, at least one key portion of the key portions including the oil storage unit,   wherein the key portion includes a key root portion and a protrusion extending axially from the key root portion and the oil storage unit comprises a recess formed in the protrusion.   
     
     
         17 . An oldham ring, comprising:
 an annular ring portion;   at least one key portion protruding axially from the ring portion, the key portion being configured to be slidably coupled to a key groove provided in one of a scroll or a frame coupled to the oldham ring; and   a reinforcing member coupled to the key portion of the oldham ring, the reinforcing member comprising:
 a plurality of reinforcing surfaces facing sliding side surfaces of the key portion; and 
 a connecting surface connecting the plurality of reinforcing surfaces and facing an outer circumferential side surface of the key portion. 
   
     
     
         18 . The oldham ring of  claim 17 , wherein the key portion is a first key portion protruding axially from the ring portion in a first direction, and the oldham ring further includes a second key portion protruding axially from the ring porition in a second direction opposite the first direction. 
     
     
         19 . The oldham ring of  claim 18 , wherein the ring portion includes a groove and the key portion includes a protrusion slidingly receivable in the groove. 
     
     
         20 . The oldham ring of  claim 19 , wherein the key portion comprises a porous material configured to store oil.