Positioning structure and method for assembling compressor

Abstract

A positioning structure and a method are used to assemble a scroll compressor for outputting high-pressure fluid. The casing, supporting stage and the upper scroll are arranged and positioned by using pin engaged with pin hole. The lower scroll is provided on a baffle face of the supporting stage. A transmission shaft is pivotally arranged on the supporting stage with one end connected to a rotation power source. The transmission shaft comprises a crank at top thereof and is connected to bottom of the lower scroll such that the axis of the upper scroll is coaxial with the transmission shaft of the lower scroll. Moreover, the upper scroll and the lower scroll have relative acentric rotation to generate high-pressure fluid.

1 . A positioning structure for a compressor, the compressor comprising a casing for mounting a supporting stage, an upper scroll, a lower scroll and a transmission shaft, the transmission shaft pivotally connected to an axial hole of the supporting stage and an axial hole on bottom of the casing and having one end connected to a rotation power source and having another end connected to a bottom of the lower scroll for driving the upper scroll and the lower scroll to have relative acentric rotation and generating high-pressure fluid, the positioning structure being characterized in that 
 the supporting stage is fixed to a lower shell of the casing and the supporting stage comprises at least one pin hole, the upper scroll comprises at least one corresponding pin hole, a pin is inserted into the pin hole of the supporting stage and the pin hole of the upper scroll to limit a relative position between the upper scroll and the supporting stage.    
   
   
       2 . The positioning structure for a compressor as in  claim 1 , wherein the pin is inserted into the pin hole of the supporting stage and the pin hole of the upper scroll to limit a radial degree of freedom for the upper scroll.  
   
   
       3 . The positioning structure for a compressor as in  claim 1 , wherein at least part of the casing and the supporting stage is made by casting such that portion of the casing and the supporting stage is made by casting.  
   
   
       4 . The positioning structure for a compressor as in  claim 1 , wherein the casing and the supporting stage are integrally formed.  
   
   
       5 . The positioning structure for a compressor as in  claim 1 , wherein the pin comprises a rod-shaped body, a flange at top side thereof, and a thread at bottom side thereof, the thread passing through the pin hole of the supporting stage and the pin hole of the upper scroll such that the pin is retained to the pin hole of the supporting stage.  
   
   
       6 . The positioning structure for a compressor as in  claim 5 , wherein the pin passes through the upper scroll and the supporting stage and selectively fixed to the casing and the supporting stage.  
   
   
       7 . A positioning structure for a compressor, the compressor comprising a casing for mounting a supporting stage, an upper scroll, a lower scroll and a transmission shaft, the transmission shaft pivotally connected to an axial hole of the supporting stage and an axial hole on bottom of the casing and having one end connected to a rotation power source and having another end connected to a bottom of the lower scroll for driving the upper scroll and the lower scroll to have relative acentric rotation and generating high-pressure fluid, the positioning structure being characterized in that 
 the casing comprises a lower shell on bottom thereof and the lower shell comprises an axial hole, the supporting stage is fixed to the lower shell of the casing;    the supporting stage comprises at least one pin hole, the lower shell comprises at least one corresponding pin hole, a pin is inserted into the pin hole of the supporting stage and the pin hole of the lower shell to limit a relative position between the axial hole of the supporting stage, which is pivotally connected to the transmission axis, and the axial hole of the lower scroll, whereby an axis of the transmission axis can be positioned.    
   
   
       8 . The positioning structure for a compressor as in  claim 7 , wherein the pin is inserted into the pin hole of the supporting stage and the pin hole of the casing to limit a radial degree of freedom for the supporting stage.  
   
   
       9 . The positioning structure for a compressor as in  claim 7 , wherein at least part of the casing and the supporting stage is made by casting such that portion of the casing and the supporting stage is made by casting.  
   
   
       10 . The positioning structure for a compressor as in  claim 7 , wherein the casing and the supporting stage are integrally formed.  
   
   
       11 . The positioning structure for a compressor as in  claim 7 , wherein the pin comprises a rod-shaped body, a flange at top side thereof, and a thread at bottom side thereof, the thread passing through the pin hole of the supporting stage and the pin hole of the lower scroll such that the pin is retained to the pin hole of the lower scroll.  
   
   
       12 . The positioning structure for a compressor as in  claim 11 , wherein the pin passes through the casing, and the supporting stage and selectively fixed to the casing and the supporting stage.  
   
   
       13 . A method for assembling a compressor, the compressor comprising a casing, a supporting stage in the casing, an upper scroll and a lower scroll being fixed to the supporting stage to achieve generation of high-pressure fluid, the method comprising the steps of: 
 fixing the supporting stage to a predetermined position in the casing of the compressor and the supporting stage providing a position reference for successive assembling;    inserting one end of a transmission shaft of the lower scroll to an axial hole of a lower shell, another end of the transmission shaft passing an axial hole in the supporting stage such that both ends of the transmission shaft are retained by the two axial holes; and    inserting at least one pin into corresponding pin hole such that the upper scroll and the transmission shaft are coaxially positioned.    
   
   
       14 . The method for assembling a compressor as in  claim 13 , wherein the step of inserting at least one pin into corresponding pin hole comprising: 
 aligning a pin hole of the upper scroll to a pin of the supporting stage, inserting the pin into the pin hole of the upper scroll to position the upper scroll and the supporting stage.    
   
   
       15 . The method for assembling a compressor as in  claim 13 , wherein the step of inserting at least one pin into corresponding pin hole comprising: 
 aligning a pin hole of the casing to a pin of the supporting stage, inserting the pin into the pin hole of the upper scroll to position the upper scroll and the supporting stage.