Method for mounting a drive shaft of a compressor

Abstract

The invention concerns a method for mounting a drive shaft ( 19 ) of a compressor, particularly a hermetical refrigerant compressor, which has a motor with a stator ( 1 ) and a rotor ( 23 ), connected with the drive shaft ( 19 ) and located in a rotor opening ( 4 ) of the stator ( 1 ), a first bearing support ( 8 ) and a second bearing support ( 29 ) being connected with the stator ( 1 ), a first bearing ( 15 ) for the drive shaft ( 19 ) being mounted in the first bearing support ( 8 ) and a second bearing ( 28 ) for the drive shaft ( 19 ) being mounted in the second bearing support ( 29 ). It is endeavoured to provide a method for mounting a drive shaft, in which the use of components with relatively large manufacturing tolerances will still result in a good alignment of the drive shaft in relation to the stator. For this purpose, at least the first bearing support ( 8 ) is provided with a positioning stop for the first bearing ( 15 ) after mounting the first bearing support ( 8 ) on the stator ( 1 ).

1 - 11 . (canceled)  
   
   
       12 . A tool for mounting a drive shaft bearing to a stator, the tool comprising: 
 a first support part having a first support part diameter and a first support part surface, the first support part diameter substantially corresponding to a diameter of a rotor opening of the stator, and the first support part surface including a first opening extending into the first support part; and    a second support part having a second support part surface opposing the first support part surface, the second support part surface including a second opening extending into the second support part and opposing the first opening;    wherein the first support part is incapable of radial movement when at least partially inserted into the rotor opening.    
   
   
       13 . The tool of  claim 12 , wherein the first opening is positioned in the first support part surface so as to substantially correspond to a desired position of the drive shaft bearing relative to the rotor opening.  
   
   
       14 . The tool of  claim 12 , wherein the first and second support part surfaces are adapted to selectively engage opposing sides of a bearing support positioned across the rotor opening.  
   
   
       15 . The tool of  claim 12 , wherein the first opening has an inner cross-sectional profile substantially corresponding to an outer cross-sectional profile of the drive shaft bearing.  
   
   
       16 . The tool of  claim 12 , further comprising a punching device disposed in the second opening and displaceable so as to at least partially extend into the first opening during a punching operation.  
   
   
       17 . The tool of  claim 12 , further comprising a control device disposed in the first opening and displaceable so as to at least partially extend into the second opening while inserting the drive shaft bearing into a bearing support.  
   
   
       18 . The tool of  claim 17 , wherein the control device includes a projection, the projection being the portion of the control device extending at least partially into the second opening while inserting the drive shaft bearing into the bearing support, the first opening having an inner cross-sectional profile and the projection having an outer cross-sectional profile substantially corresponding, respectively, to an outer and an inner cross-sectional profile of the drive shaft bearing so as to inhibit radial displacement of the drive shaft bearing while inserting the drive shaft bearing into the bearing support.  
   
   
       19 . A compressor motor comprising: 
 a drive shaft;    a stator having a first stator end and a second stator end and a rotor opening extending therebetween, the rotor opening surrounding at least a portion of the drive shaft;    a rotor mounted on the drive shaft located in the rotor opening;    a first bearing support mounted to the stator first end and having a first positioning stop formed therein; and    a first bearing located with the first positioning stop and rotatably supporting the drive shaft in the vicinity of the first stator end;    wherein the first positioning stop is formed in the first bearing support after the first bearing support is mounted to the stator first end.    
   
   
       20 . The compressor motor of  claim 19 , further comprising: 
 a second bearing support mounted to the stator second end and having a second positioning stop formed therein; and    a second bearing located within the second positioning stop and rotatably supporting the drive shaft in the vicinity of the second stator end;    wherein the second bearing is located within the second positoning stop and aligned concentrically to the rotor opening before the second bearing stop is mounted to the stator second end.