Electric compressor

Abstract

A compressor includes a main housing having an internal space, a motor provided in the main housing and comprising a stator and a rotor, a shaft coupled to the rotor, and a shaft mounting portion provided at one end of the shaft and having a smaller diameter than the shaft. A sub-ball bearing is coupled to the shaft mounting portion, and a fixing latch is coupled to the shaft mounting portion. The fixing latch includes a latching portion configured to constrain the sub-ball bearing in the shaft mounting portion.

What is claimed is: 
     
         1 . A compressor comprising:
 a main housing defining an internal space;   a motor disposed in the main housing and comprising a stator and a rotor;   a shaft coupled to the rotor;   a shaft mounting portion formed at one end of the shaft and having a smaller diameter than remaining portions of the shaft;   a sub-ball bearing coupled to the shaft mounting portion; and   a fixing latch coupled to the shaft mounting portion and comprising a latching portion configured to constrain the sub-ball bearing on the shaft mounting portion.   
     
     
         2 . The compressor of  claim 1 , wherein the fixing latch includes two or more latching portions and a supporting portion that is connected to the two or more latching portions. 
     
     
         3 . The compressor of  claim 2 , wherein the supporting portion comprises a portion that is forwardly extended from the latching portion toward the shaft mounting portion. 
     
     
         4 . The compressor of  claim 3 , wherein the fixing latch includes a plurality of latching portions and a plurality of supporting portions forwardly extended from respective ones of the latching portions, and
 the plurality of supporting portions being connected with each other in front areas of the latching portions.   
     
     
         5 . The compressor of  claim 2 , wherein the supporting portion comprises a coupling hole configured for receiving a fastener to couple the supporting portion to the shaft mounting portion. 
     
     
         6 . The compressor of  claim 2 , wherein the shaft mounting portion comprises a hollow portion, and the fixing latch is inserted into the hollow portion. 
     
     
         7 . The compressor of  claim 6 , wherein the shaft mounting portion comprises an opening extending radially outward through the shaft mounting portion from the hollow portion and configured to couple with a latching portion of the fixing latch. 
     
     
         8 . The compressor of  claim 7 , wherein the length and the width of the latching portion are equal to the length and the width of the opening, and a predetermined area of the latching portion is configured to project through the opening and extend radially outward from the shaft mounting portion. 
     
     
         9 . The compressor of  claim 1 , wherein an upper area of the latching portion is downwardly inclined from a front side of the latching portion to a rear side of the latching portion. 
     
     
         10 . The compressor of  claim 8 , wherein a front side of the latching portion is higher than the opening and a rear side of the latching portion is as high as the opening. 
     
     
         11 . The compressor of  claim 1 , wherein the opposite end of the shaft is rotatably supported by a journal bearing. 
     
     
         12 . The compressor of  claim 1 , wherein the fixing latch has elasticity. 
     
     
         13 . A compressor comprising:
 a main housing defining an internal space;   a motor disposed in the main housing and comprising a stator and a rotor;   a shaft coupled to the rotor;   a shaft mounting portion formed at one end of the shaft and having a smaller diameter than remaining portions of the shaft;   a sub-ball bearing coupled to the shaft mounting portion;   a hollow portion defined in the shaft mounting portion; and   a fixing latch comprising a latching portion and a supporting portion connected to the latching portion, wherein one side of the latching portion contacts an edge of the sub-ball bearing and one side of the supporting portion opposite from a side of the supporting portion connected with the latching portion is inserted in the hollow portion.   
     
     
         14 . The compressor of  claim 13 , wherein the latching portion is downwardly inclined from a front side of the latching portion to a rear side of the latching portion. 
     
     
         15 . The compressor of  claim 13 , wherein the fixing latch includes two or more latching portions and a supporting portion that is connected to the two or more latching portions. 
     
     
         16 . The compressor of  claim 15 , wherein the supporting portion comprises an area that is forwardly extended from the latching portion. 
     
     
         17 . A compressor comprising:
 a main housing defining an internal space;   a motor disposed in the main housing and comprising a stator and a rotor;   a shaft coupled to the rotor;   a shaft mounting portion formed at one end of the shaft and having a smaller diameter than remaining portions of the shaft;   a sub-ball bearing coupled to the shaft mounting portion;   a hollow portion defined in the shaft mounting portion; and   a fixing latch comprising a latching portion and a supporting portion connected to the latching portion, wherein one side of the latching portion contacts an edge of the sub-ball bearing and one side of the supporting portion opposite from a side of the supporting portion connected with the latching portion is coupled to an outer surface of the shaft mounting portion.   
     
     
         18 . The compressor of  claim 17 , wherein the latching portion is downwardly inclined from a front side of the latching portion to a rear side of the latching portion. 
     
     
         19 . The compressor of  claim 17 , wherein the fixing latch comprises two or more latching portions and a supporting portion that is connected to the two or more latching portions. 
     
     
         20 . The compressor of  claim 19 , wherein the supporting portion comprises an area that is forwardly extended from the latching portion.