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Hermetic compressor

a compressor and hermetic technology, applied in the direction of positive displacement liquid engines, piston pumps, lighting and heating apparatus, etc., can solve the problems of low productivity, poor workability, etc., to prevent damage to sliding surfaces, improve workability and productivity, and insert easily into the large end hole

Inactive Publication Date: 2010-05-27
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides a hermetic compressor with good workability and high productivity in assembly while preventing damage to sliding surfaces during insertion of an eccentric shaft portion of a shaft into a large end hole. The compressor includes a cylinder block, a shaft with an eccentric shaft portion, a countershaft portion, and a main shaft portion, and a connecting rod for connecting the piston and the eccentric shaft portion. The connecting section between the eccentric shaft portion and the countershaft portion has an extended surface that allows the large end hole to move into a position coaxial with the eccentric shaft portion, thus preventing damage to the sliding surfaces and improving workability and productivity in the assembly process.

Problems solved by technology

It thus has a drawback of poor workability and low productivity because sliding surfaces can be damaged when eccentric shaft portion 13 and large end hole 37 are forcibly rubbed with each other, and the assembling requires a considerable time.

Method used

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Examples

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first exemplary embodiment

[0043]FIG. 1 is a longitudinally sectioned view of a hermetic compressor according to the first exemplary embodiment of the present invention, FIG. 2 is an enlarged view of a principal portion of a shaft, and FIG. 3 through FIG. 6 are sectional views of the principal portion around the shaft for detailing assembling steps of the shaft. FIG. 7 is a perspective view of a principal portion of the shaft, and FIG. 8 is another enlarged sectional view of the principal portion around the shaft for detailing the assembling steps.

[0044]Referring now to FIG. 1 through FIG. 8, description is provided hereinafter of the hermetic compressor according to this exemplary embodiment of the invention.

[0045]In FIG. 1 to FIG. 8, hermetically sealed container 101 is filled with a refrigerant (not shown), and it also stores refrigerating machine oil (not shown). In one instance here, the refrigerant is a hydrocarbon group refrigerant of R600a, and the refrigerating machine oil is a mineral oil having goo...

second exemplary embodiment

[0068]FIG. 9 is a longitudinally sectioned view of a hermetic compressor according to a second exemplary embodiment of the present invention, FIG. 10 is an enlarged view of a principal portion of a shaft, and FIG. 11 through FIG. 14 are sectional views of the principal portion around the shaft for detailing assembling steps of the shaft.

[0069]With reference to FIG. 9 through FIG. 14, description is provided hereinafter of the hermetic compressor according to this exemplary embodiment of the invention.

[0070]In FIG. 9 to FIG. 14, hermetically sealed container 201 is filled with a refrigerant (not shown), and it also stores refrigerating machine oil (not shown). In this instance, the refrigerant is a hydrocarbon group refrigerant of R600a, and the refrigerating machine oil is a mineral oil having good compatibility with the refrigerant.

[0071]Motor element 203 includes stator 205 connected to an external power supply (not shown), and rotor 207 disposed inside stator 205 with a predeterm...

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Abstract

A hermetic compressor includes a shaft having a connecting section formed between an eccentric shaft portion and a countershaft portion, the connecting section provided with an axial length sufficient for shifting a large end hole of a connecting rod to a position coaxial with the eccentric shaft portion. The shaft also has an extended surface of the eccentric shaft portion formed on the connecting section at one side opposite an eccentric axis thereof. This structure facilitates alignment of the center of axes of the eccentric shaft portion and the large end hole by simply sliding the extended surface of the shaft along a sliding surface of the large end hole, so as to ease insertion of the eccentric shaft portion into the large end hole, and prevent damages to the sliding surfaces of the eccentric shaft portion and the large end hole, thereby improving workability and productivity of assembling the shaft as well as reliability of the compressor.

Description

TECHNICAL FIELD[0001]The present invention relates to hermetic compressors used mainly for domestic refrigerators.BACKGROUND ART[0002]A conventional hermetic compressor is disclosed in Japanese Patent Unexamined Publication, No. 2004-137926, which employs a shaft of such configuration that a countershaft portion and a main shaft portion are unitary formed in a coaxial manner with an eccentric shaft portion between them.[0003]Description is provided hereinafter of the conventional hermetic compressor noted above with reference to the drawings.[0004]FIG. 15 is a longitudinally sectioned view of the conventional hermetic compressor, FIG. 16 is an enlarged view of a principal portion of a conventional shaft, and FIG. 17 to FIG. 21 are enlarged sectional views of the principal portion around the shaft for detailing the assembling steps of the shaft.[0005]As shown in FIG. 15 to FIG. 21, hermetically sealed container 1 houses motor element 9 included of stator 5 having winding 3 and rotor ...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): F04B39/00F04B39/14
CPCF04B39/0022F04B39/14F04B39/0094F04B39/122F04B39/0005F04B9/045F25B31/00F05B2240/50Y10S384/00Y10S417/902
Inventor OKAMOTO, TAKAYUKIMATSUKI, FUMIO
Owner PANASONIC CORP