JPH05157060A - Scroll compressor - Google Patents

Abstract

PURPOSE:To fix a fixing scroll without giving it local concentration of stress by providing the fixed scroll, a rotating scroll, a specific block, and a plurality of plate springs, and by storing the fixing scroll and the block to the groove of the block in a sandwiched manner, and whereby fixing them. CONSTITUTION:A fixing scroll 4a, a rotating scroll 5, and a block 3a, the linear expansion coefficient of which is almost equal to that of the fixing scroll 4a, and which has a groove 3aa on the outer periphery, are provided. A plurality of plate springs 9 to be stored in the groove 3aa of the block, for sandwiching the fixing scroll 4a and the block 3a to be fixed, are provided. After the fixing scroll 4a and the rotating scroll 5 are positioned, and when the fixing scroll 4a and the block 3a are to be fixed, the plate springs 9 are stored in the groove 3aa provided on the outer periphery of the block 3a, and they are sandwiched between the plate springs 9, and are fixed thereby. By fixing them through the flat force of the plate spring 9, stress concentration can be dispersed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a compressor groove portion of a scroll compressor, a fixed scroll and a method of fixing a block.

[0002]

2. Description of the Related Art A conventional fixing method is a fixed scroll,
After positioning the orbiting scroll, the fixed scroll is fixed to the block with multiple bolts, which causes localized stress concentration in the bolt tightening part of the fixed scroll, and depending on the material, it can be used. There was a problem of not having.

The conventional fixing method will be described below with reference to the drawings. FIG. 5: is sectional drawing of the scroll compressor by the conventional fixing method. In FIG. 5, reference numeral 1 is a closed casing, 2 is an electric motor section, and on top of which there is a compression mechanism section 7 composed of a block 3, a fixed scroll 4, an orbiting scroll 5, an orbiting scroll autorotation preventing mechanism 6 and a bolt 8. .

Fixed scroll 4 constructed as described above
The method of fixing the block 3 will be described below.

After positioning the fixed scroll 4 and the orbiting scroll 5, the fixed scroll 4 is fixed to the block 3 with a plurality of bolts 8.

[0006]

However, in the above-mentioned conventional fixing method, local stress concentration due to the tightening of the bolts is locally provided around the bolt holes of the fixed scroll 4, so that the atmosphere of the refrigerant and the refrigerating machine oil in the closed casing 1 is changed. There is a drawback that a portion subjected to stress concentration is damaged by stress cracking due to temperature.

As a fixing method other than bolts, Japanese Patent Laid-Open No. 2-2
There is also a method of locally irradiating high energy as disclosed in Japanese Patent No. 04693, but it has a drawback that distortion due to heat is generated.

SUMMARY OF THE INVENTION The present invention solves the conventional problems, and an object thereof is to prevent local stress concentration from being exerted on the fixed block when fixing the fixed scroll and the block.

Another object of the invention is to position the scroll and not require a very strong leaf spring.

[0010]

In order to achieve this object, a fixing method of the present invention is a fixed scroll, an orbiting scroll, a block having linear expansion coefficients substantially equal to those of the fixed scroll, and a groove having an outer periphery, and a block of the block. It is composed of a plurality of leaf springs that are housed in the groove and sandwich and fix the fixed scroll and the block.

Further, a fixed scroll provided with a plurality of protrusions, a block having a recess for fitting the protrusion of the fixed scroll to a mating surface of the fixed scroll and a groove provided on the outer periphery, and a plurality of leaf springs. It consists of

[0012]

According to the fixing method of the present invention, when the fixed scroll and the orbiting scroll are positioned and then the fixed scroll and the block are fixed, a plurality of leaf springs are housed in the groove provided on the outer periphery of the block, It is done by sandwiching. Since it is fixed by the planar force of the leaf spring, the stress concentration can be dispersed.

In the fixing method using the fixed scroll provided with the projection, the scroll is positioned by fitting the projection and the recess, and the projection of the fixed scroll is fitted in the recess of the block. Since it does not rotate, the leaf spring for fixing the fixed scroll can be fixed with a spring having a smaller clamping force than the above-mentioned example without the protrusion.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment for fixing a fixed scroll and a block according to the present invention will be described below with reference to the drawings. It should be noted that the same configurations as those of the conventional one are denoted by the same reference numerals and detailed description thereof will be omitted.

FIG. 1 is a sectional view of a scroll compressor according to a first embodiment of the present invention, and FIG. 2 is an enlarged sectional view of a main part of FIG.

1 and 2, 3a is a block, 3
aa is a groove on the outer circumference of the block, 4a is a fixed scroll,
Reference numeral 5 is an orbiting scroll, 6 is a rotation preventing mechanism of the orbiting scroll, and 9 is a leaf spring.

The fixing method of the compression mechanism section 7 constructed as described above will be described below. The compression mechanism part engages the orbiting scroll 5 and the fixed scroll 4a with each other,
The fixed scroll 4a is superposed on the block 3a. After positioning the scroll, the groove 3a on the outer periphery of the block 3a
A plurality of leaf springs 9 can be housed in a, and the fixed scroll 4a can be fixed to the block 3a by the clamping force of the leaf springs 9.

As described above, the fixing method of this embodiment can be fixed because the block 3a having the groove 3aa on the outer periphery, the fixed scroll 4a and the leaf spring 9 are used.

Next, a second embodiment will be described with reference to the drawings. The same components as those in the first embodiment are designated by the same reference numerals and detailed description thereof will be omitted.

FIG. 3 is a sectional view of a scroll compressor according to a second embodiment of the present invention, and FIG. 4 is an enlarged sectional view of a main part of FIG.

3 and 4, 3b is a block and 4 is a block.
b is a fixed scroll, 9 is a leaf spring, 10 is a protrusion of the fixed scroll, 11 is a concave portion of the block, and 12 is a block 3b.
It is a groove on the outer circumference. In the present embodiment, the fixing method according to the first embodiment is further provided with a projection 10 on the fixed scroll and a recess 11 for fitting the projection 10 on a block.

The fixing method of the compression mechanism section configured as described above will be described below. The compression mechanism engages the orbiting scroll 5 and the fixed scroll 4b with each other,
The fixed scroll 4b is fitted on the projection 10 of the fixed scroll and the recess 11 of the block, and is superimposed on the block 3b. A plurality of leaf springs 9 are housed in the groove 12 on the outer periphery of the block and fixed by the clamping force of the leaf springs 9.

As described above, according to the fixing method of this embodiment, the fixed scroll does not rotate as compared with the first embodiment, and therefore the leaf spring can be fixed with a small clamping force.

[0024]

As described above, according to the present invention, a fixed scroll, an orbiting scroll, a block having substantially the same coefficient of linear expansion and a groove on the outer circumference, and a fixed scroll and a block which are housed in the groove of the block and sandwich the block. Since the compression mechanism portion is composed of the plurality of leaf springs that are fixed together, it is possible to fix the fixed scroll without local stress concentration.

Further, a fixed scroll having a plurality of protrusions, a block having a recess for fitting the protrusion of the fixed scroll on a mating surface of the fixed scroll and a groove having an outer periphery, and a plurality of leaf springs are provided. Since the fixed scroll does not rotate because it constitutes the compression mechanism, it can be fixed with a leaf spring having a smaller clamping force than when fixing the fixed scroll having no protrusion.

[Brief description of drawings]

FIG. 1 is a sectional view of a first embodiment of a scroll compressor according to the present invention.

FIG. 2 is an enlarged view of a main part of FIG.

FIG. 3 is a sectional view of a second embodiment of the scroll compressor according to the present invention.

FIG. 4 is an enlarged view of a main part of FIG.

FIG. 5 is a sectional view of a scroll compressor according to a conventional fixing method.

[Explanation of symbols]

 3a block 3a groove of block 4a fixed scroll 5 orbiting scroll 9 leaf spring 3b block with recess and groove on outer circumference 4b fixed scroll with projection 10 projection of fixed scroll 11 recess of block 12 groove on block outer circumference

Claims (2)

[Claims] 1. A fixed scroll, an orbiting scroll,
A scroll compressor comprising: a block having a groove on the outer periphery and a coefficient of linear expansion substantially equal to that of the fixed scroll; and a plurality of leaf springs housed in the groove of the block and sandwiching and fixing the fixed scroll. 2. A fixed scroll having a plurality of protrusions,
A scroll compressor comprising a block having a recess on the mating surface of an orbiting scroll and a fixed scroll, into which the projection of the fixed scroll is fitted, and a groove provided on the outer periphery, and a plurality of leaf springs.