JP2002339871A - Compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a compressor having a junction structure of a housing capable of positively pressing a second partition wall part to a first constituent body without causing a weight increase of a second constituent body. SOLUTION: A through bolt 41 composing an outer fixing means is penetratively arranged in an outermost circumference part of the housing 11, and it fastens and fixes a front housing 13, a cylinder block 12 and a rear housing 15. A through bolt 42 composing an inner fixing means fastens and fixes the rear housing 15 and the cylinder block 12 by passing a center part of the housing 11 from the rear housing 15 through a suction chamber 24 and a valve/port forming body 14 and screwing into the cylinder block 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a compressor used for, for example, an air conditioner for a vehicle, and more particularly to a joining structure of a housing in the compressor.

[0002]

2. Description of the Related Art As this type of compressor, there is a piston type compressor as shown in FIG. A housing 101 of the compressor includes a front housing 102, a cylinder block 103, and a rear housing 104 as components, and these components are fastened and fixed by a plurality of through bolts 105.

The rear housing 1 is fixed to the housing 101 by joining and fixing the cylinder block 103 and the rear housing 104 via a valve / port forming body 106.
A discharge chamber 107 is formed outside the inside of the chamber 04, and a suction chamber 108 is formed inside the inside. Rear housing 104
The first annular partition wall 10 surrounding the discharge chamber 107
9 and a discharge chamber 10 inside the first partition wall portion 109.
Annular second partition wall section 11 that partitions partition wall 7 from suction chamber 108
0 is provided.

The through bolt 105 is inserted through the outermost periphery of the housing 101. In particular, in the rear housing 104, the first partition wall 109 into which the through bolt 105 is screwed is used as a fastening point for the cylinder block. 103.

[0005]

However, in the rear housing 104, the second partition wall portion 110 located inside the first partition wall portion 109 is connected to the first partition wall portion 109 by the through bolt 105 and the cylinder block 103. And the rigidity (non-deformability) of the rear housing 104 that propagates this fastening force, to make use of the valve / port forming body 106.
Is pressed against the cylinder block 103 via the

That is, in order to reliably hold the valve / port forming body 106 between the second partition wall 110 and the cylinder block 103 and to reliably shut off the discharge chamber 107 and the suction chamber 108, It is necessary to make the rear housing 104 highly rigid. Therefore, there has been a problem that the weight of the rear housing 104 is increased to secure the rigidity.

SUMMARY OF THE INVENTION An object of the present invention is to provide a compressor having a housing joining structure capable of securely pressing the second partition wall against the first component without increasing the weight of the second component. Is to provide.

[0008]

In order to achieve the above object, according to the first aspect of the present invention, a housing formed by joining and fixing a plurality of components is provided by joining a first component and a second component. One of the discharge chamber or the suction chamber is formed outside the second component, and the other of the discharge chamber or the suction chamber is formed inside the second component, and the second component has an annular first shape surrounding the outer chamber. In a compressor provided with a partition wall portion and a second partition wall portion that partitions an outer chamber and an inner chamber inside the first partition wall portion, the first component and the second component are provided. And an inner fixing means for fastening and fixing the inside of the first partition wall portion.

In this configuration, the first component and the second component are fastened and fixed inside the first partition wall by the inner fixing means. Therefore, the deformation of the portion inside the first partition wall portion in the second component can be reliably suppressed, and the second partition wall portion can be reliably pressed against the first component.

A second aspect of the present invention is to limit the preferable mode of the inner fixing means in the first aspect. That is, the inner fixing means fastens and fixes the first component and the second component inside the second partition wall.

A third aspect of the present invention is directed to the first or second aspect, which limits a preferable mode of the inner fixing means.
That is, the inner fixing means fastens and fixes the first component and the second component on the second partition wall.

A fourth aspect of the present invention is directed to any one of the first to third aspects, which limits a preferable mode of the inner fixing means. That is, the inner fixing means fastens and fixes the first component and the second component inside the first partition wall and outside the second partition wall.

According to a fifth aspect of the present invention, in any one of the first to fourth aspects, the inner fixing means fastens and fixes the two components by a bolt inserted between the first component and the second component. It is characterized by:

In this configuration, a bolt is employed as the inner fixing means, and the fastening between the second partition wall portion and the first structural body is more facilitated than in the case where, for example, a press-fit pin is employed as the fixing means. Can be robust.

According to a sixth aspect of the present invention, in any one of the first to fifth aspects, the inner fixing means has a press-fit portion, and the press-fit portion is used to press-fit into at least one of the first and second components. Thus, both components are fastened and fixed.

In this configuration, the first and second components can be easily assembled by the inner fixing means. According to a seventh aspect of the present invention, in the sixth aspect, the press-fitting portion is a first type.
A press-fit pin interposed between the component and the second component forms a feature.

In this configuration, the press-fit pin as the fixing tool is smaller than the through-bolt, and for example, a configuration in which the inner fixing means is accommodated within the thickness of the second partition wall (the invention of claim 3) is also embodied. Easy.

According to an eighth aspect of the present invention, in the sixth aspect, the press-fit portion is formed integrally with one of the first and second components and press-fit into the other. In this configuration, an increase in the number of components of the compressor due to the provision of the inner fixing means can be suppressed.

According to a ninth aspect of the present invention, in any one of the first to eighth aspects, there is provided an outer fixing means for fastening and fixing the first component and the second component on the first partition wall. And

In this configuration, the first component and the second component are fastened and fixed by the inner fixing means inside the outer fixing means. Therefore, the deformation of the portion inside the first partition wall portion in the second component can be reliably suppressed, and the second component does not depend much on the fastening force by the outer fixing means and the rigidity of the second component. The partition wall can be reliably pressed against the first component. Therefore, a configuration in which the rigidity of the second component is reduced can be adopted, and the weight of the second component, that is, the weight of the compressor can be reduced.

A tenth aspect of the present invention is directed to any one of the first to ninth aspects, which limits an aspect of a compressor suitable for embodying the present invention. That is, the compressor is of a piston type, and the first component is a cylinder block in which a cylinder bore for accommodating the piston is formed.
The component is an end housing that constitutes the terminal end of the housing, and a valve / port forming body is sandwiched between the cylinder block and the end housing by fastening the two.

[0022]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, first to ninth embodiments in which the present invention is embodied in a compressor used in a vehicle air conditioner will be described. In the second to ninth embodiments, only differences from the first embodiment will be described, and the same or corresponding members will be denoted by the same reference numerals and description thereof will be omitted.

First Embodiment (Outline of Compressor) As shown in FIG. 1, a housing 11 of a single-head piston type variable displacement compressor (hereinafter simply referred to as a compressor) includes a cylinder block 12 and a (Left side of drawing)
The front housing 13 is joined and fixed to one end, and the rear housing 15 is joined and fixed to the rear (right side in the drawing) end of the cylinder block 12 via a valve / port forming body 14. The cylinder block 12, the front housing 13, and the rear housing 15 are made of an aluminum-based metal material. Further, the valve / port forming body 14 is formed by polymerizing a plurality of plate-like bodies.

A crank chamber 16 is defined in a region surrounded by the cylinder block 12 and the front housing 13. A drive shaft 17 is rotatably disposed in the crank chamber 16. The drive shaft 17 is connected to an engine (not shown) of the vehicle, and is driven to rotate by the engine.

A lug plate 18 is fixed on the drive shaft 17 in the crank chamber 16 so as to be integrally rotatable. A swash plate 1 as a cam plate is provided in the crank chamber 16.
9 are accommodated. The swash plate 19 is supported by the drive shaft 17 so as to be slidable and tiltable. The hinge mechanism 20 is interposed between the lug plate 18 and the swash plate 19. Therefore, the swash plate 19 is hinged to the lug plate 18 via the hinge mechanism 20 and the drive shaft 17 is supported, so that the swash plate 19 and the drive shaft 17 are supported.
, And can be tilted with respect to the drive shaft 17 with sliding movement of the drive shaft 17 in the axial direction.

A plurality of (only one is shown in the drawing) cylinder bores 12a are formed through the cylinder block 12 so as to surround the drive shaft 17. The single-headed piston 21 is reciprocally accommodated in each of the cylinder bores 12a. The front and rear openings of the cylinder bore 12a are closed by the valve / port forming body 14 and the piston 21, and a compression chamber 22 whose volume changes in accordance with the reciprocation of the piston 21 is defined in the cylinder bore 12a. Each piston 21 is moored to the outer peripheral portion of the swash plate 19 via a shoe 23. Therefore, the rotational movement of the swash plate 19 accompanying the rotation of the drive shaft 17 is converted into the reciprocating linear movement of the piston 21 via the shoe 23.

Between the valve / port forming body 14 and the rear housing 15, a suction chamber 24 and a discharge chamber 25 are respectively formed. Then, the refrigerant gas in the suction chamber 24 moves from the top dead center position to the bottom dead center side of each piston 21, and flows through the suction port 26 and the suction valve 27 formed in the valve / port forming body 14 to the compression chamber. Inhaled in 22.
The refrigerant gas sucked into the compression chamber 22 is compressed to a predetermined pressure by moving from the bottom dead center position of the piston 21 to the top dead center side, and is discharged to the discharge port 28 formed in the valve / port formation body 14 and the discharge port 28. Discharged into the discharge chamber 25 via the valve 29.

The compressor has a well-known configuration in which a control valve (not shown) is provided, and the pressure in the crank chamber 16 is determined by adjusting the opening of the control valve. This crankcase 1
6, the difference between the internal pressure of the crank chamber 16 and the internal pressure of the compression chamber 22 via the piston 21 is changed, and the inclination angle of the swash plate 19 is changed.
One stroke, the displacement of the compressor, is adjusted.

(Joint structure of housing in compressor)
As shown in FIGS. 1 and 2, a housing 11 formed by joining and fixing a plurality of components (in this embodiment, a cylinder block 12, a front housing 13 and a rear housing 15) has a cylinder as a first component. By joining the block 12 and a rear housing 15 which is a rear end housing as a second component, a discharge chamber 25 is formed in an outer annular region inside the rear housing 15 so that the discharge chamber 25 is surrounded by the discharge chamber 25. Each of the suction chambers 24 is defined.

A discharge chamber 25 is provided in the rear housing 15.
, And an annular second partition wall 32 that partitions the discharge chamber 25 and the suction chamber 24 inside the first partition wall 31. The first partition wall portion 31 is in pressure contact with the rear end surface of the cylinder block 12 via the valve / port forming body 14 with its front end surface 31a to shut off the discharge chamber 25 from the outside air. The second partition wall portion 32 is in pressure contact with the rear end surface of the cylinder block 12 via the valve / port forming body 14 with its front end surface 32a to shut off the space between the discharge chamber 25 and the suction chamber 24. .

Then, the above-mentioned preferred contact state between the first partition wall 31 and the cylinder block 12 and the preferred contact state between the second partition wall 32 and the cylinder block 12, in other words, the cylinder block 12 and the rear block Housing 1
5 is provided by the fastening between the rear housing 15 and the cylinder block 12 via the valve / port formation 14 by the outer fixing means and the inner fixing means. .

That is, the outer fixing means is provided with a plurality of (six in this embodiment) through bolts 41. The plurality of through bolts 41 are arranged at substantially equal angular intervals around the drive shaft 17 at the outermost periphery of the housing 11. Each through-bolt 41 reaches the rear housing 15 from the front housing 13 through the cylinder block 12 and the valve / port forming body 14. In the rear housing 15, a screw hole 31b is formed in a front end surface 31a of the first partition wall portion 31, and a front end of the through bolt 41 is screwed into the screw hole 31b. Therefore, especially in the rear housing 15, the first partition wall 31 into which the distal end of the through bolt 41 is screwed is formed.
It is joined and fixed to the cylinder block 12 as a direct fastening portion by the outer fixing means.

The inner fixing means which is a feature of this embodiment is that the cylinder block 12 and the rear housing 15 are disposed inside the first partition wall 31 in other words, the outer fixing means (through bolt 41 or screw hole 41). 31b).

The inner fixing means has a through bolt 42. The through bolt 42 passes through the center of the housing 11 from the rear housing 15 to the cylinder block 12 through the inside of the suction chamber 24 and the valve / port forming body 14. A screw hole 12b is formed in the center of the rear end surface of the cylinder block 12, and the tip of the through bolt 42 is screwed into the screw hole 12b. That is, the rear housing 15 is joined and fixed to the cylinder block 12 on the inner side of the second partition wall 32 as a direct fastening portion by the inner fixing means (such as the through bolt 42 and the screw hole 12b).

The present embodiment having the above configuration has the following effects. (1) The cylinder block 12 and the rear housing 15 are fastened and fixed by inner fixing means (such as through bolts 42) inside the outer fixing means (such as through bolts 41). Therefore, deformation of the rear housing 15 at a portion inside the first partition wall portion 31 can be reliably suppressed, and the second partition is not so much dependent on the fastening force by the outer fixing means and the rigidity of the rear housing 15. The wall 32 can be reliably pressed against the cylinder block 12. Therefore, a configuration in which the rigidity of the rear housing 15 is reduced can be adopted.
5, that is, the weight of the compressor can be reduced.

(2) The outer fixing means is the second partition wall 32
On the outer side, the cylinder block 12 and the rear housing 15 are fastened and fixed. The inner fixing means is provided inside the cylinder block 12 inside the second partition wall portion 32.
And the rear housing 15 are fastened and fixed. That is, the cylinder block 12 and the rear housing 15 are fastened and fixed on both sides in the radial direction with the second partition wall 32 interposed therebetween. Accordingly, deformation of the rear housing 15 at a portion inside the first partition wall portion 31 can be suppressed more reliably, and the second partition wall portion 32 can be more reliably pressed against the cylinder block 12. , (1) is more effectively performed.

(3) Through bolt 42 as inner fixing means
Has been adopted. Therefore, as compared with the case where, for example, a press-fit pin is employed as the inner fixing means (fourth embodiment described later), each part (the screw portion of the through bolt 42 and the
Even if b) is not so precisely processed, the fastening between the second partition wall portion 32 and the cylinder block 12 can be reliably performed. In other words, the press-fitting structure such as the press-fitting pin requires high precision in the dimensions of each part for achieving the predetermined interference. In addition, the through bolt 42 is connected to the second partition wall 3.
Further tightening when the connection between the cylinder block 12 and the cylinder block 12 becomes loose, that is, maintenance of the compressor is also easy.

(4) The through bolt 42 of the inner fixing means is
The central portion of the suction chamber 24 is inserted. Therefore,
The through bolts 42 act to rectify the refrigerant gas in the suction chamber 24, thereby increasing the suction efficiency of the compressor. In other words, since the through bolt 42 is located substantially at the center of the suction chamber 24, the flow of the refrigerant gas in the suction chamber 24 becomes
The flow is adjusted so as to rotate around the through bolt 42.

Second Embodiment FIG. 3 shows a second embodiment. In the present embodiment, the through bolt 42 provided in the inner fixing means is moved from the rear housing 15 within the thickness of the second partition wall portion 32 and in the valve /
It penetrates through the port forming body 14 and is screwed into the screw hole 12b of the cylinder block 12. That is, the cylinder block 12 and the rear housing 15 are
Are directly concluded. Therefore, (1) of the first embodiment is more effectively performed.

The hole into which the through bolt 42 is inserted is
The joint between the second partition wall 32 side and the valve / port forming body 14 side is cut off from the suction chamber 24 and the discharge chamber 25 by the pressure contact between the two. Therefore, through the same hole,
The shutoff between the outside air and the suction chamber 24 and the discharge chamber 25 is ensured.

The screw structure (through bolt 42, screw hole 12b, etc.) of the inner fixing means may be provided at only one place. For example, as shown in FIG.
It may be provided at a plurality of locations. The configuration of the plurality of screws is not limited to the embodiment shown in FIG. 2 (six locations), but may be 2, 3, 4, 5, or 7 locations, for example.

Third Embodiment FIG. 4 shows a third embodiment. In the present embodiment, the through bolts 42 provided in the inner fixing means are connected to the rear housing 15, the inside of the discharge chamber 25, and the valve / port forming body 1.
4 and is screwed into the screw hole 12 b of the cylinder block 12. That is, the cylinder block 12 and the rear housing 15 are provided with inner fixing means (through bolts 42, screw holes 12b, and the like) provided inside the first partition wall 31 and outside the second partition wall 32. Is fixedly fastened through. This embodiment also has the same effect as (1) of the first embodiment.

The screw structure (through bolt 42, screw hole 12b, etc.) of the inner fixing means may be provided at only one place, or, for example, as shown in FIG.
It may be provided at a plurality of locations. The configuration of the plurality of screws is not limited to the embodiment shown in FIG. 2 (six locations), but may be 2, 3, 4, 5, or 7 locations, for example.

Fourth Embodiment FIG. 5 shows a fourth embodiment. In the present embodiment, the inner fixing means includes a press-fit pin 45 as a press-fit portion instead of the through bolt 42. The press-fit pin 45 is disposed so as to pass through the valve / port forming body 14, and the right end of the press-fit pin 45 is press-fitted into a press-fit hole 32 b formed in the distal end surface 32 a of the second partition wall 32. The press-fit pin 4
The left end of 5 is press-fitted into a press-fit hole 12c formed in the rear end face of the cylinder block 12. The cylinder block 12 and the rear housing 1 are interposed by the press-fit pin 45.
5 is directly fastened and fixed in the second partition wall portion 32.

The present embodiment also has the same effects as the first embodiment. In addition, a press-fit pin 45 is employed as the inner fixing means. Therefore, the fastening of the second partition wall portion 32 of the rear housing 15 and the cylinder block 12 is a simple process of merely pushing each other.
Further, the press-fit pin 45 as a fixing tool can be made smaller than the through bolt, and the inner fixing means (the press-fit pin 45, the press-fit holes 12c, 32b, etc.) is replaced with the second partition wall 32 as in the present embodiment.
It is also easy to realize a configuration that can be accommodated within the thickness.

The press-fitting structure (press-fitting pin 45, press-fitting holes 12c, 32b, etc.) of the inner fixing means may be provided only at one place, or as shown in FIG. It may be provided at a location. Also,
The press-fitting configuration at the plurality of locations is not limited to the embodiment (six locations) in FIG.
Location.

Fifth Embodiment FIG. 6 shows a fifth embodiment. In the present embodiment, a cylindrical press-fit portion 46 is integrally formed on the distal end surface 32a of the second partition wall portion 32 as an inner fixing means. Then, the press-fitting portion 46 penetrates through the valve / port forming body 14 and is press-fitted into the press-fitting hole 12c of the cylinder block 12, thereby connecting the cylinder block 12 and the rear housing 15 to each other.
The second partition wall portion 32 is directly fastened and fixed.

In this embodiment, the same effects as in the fourth embodiment can be obtained. In addition, the press-fitting portion 46 is formed integrally with the second partition wall portion 32 (the rear housing 15), so that an increase in the number of components of the compressor due to the provision of the inner fixing means can be suppressed.

The press-fitting structure (press-fitting pin 45, press-fitting hole 12c, etc.) of the inner fixing means may be provided at only one place or, for example, as shown in FIG. It may be provided. Further, the press-fitting configuration at the plurality of locations is not limited to the mode (six locations) in FIG. 2 and may be, for example, two, three, four, five, or seven locations.

Sixth Embodiment FIG. 7 shows a sixth embodiment. This embodiment is different from the fifth embodiment in that the press-fit portion 46 is formed integrally with the cylinder block 12 instead of the rear housing 15. This embodiment also has the same effects as the fifth embodiment.

Seventh Embodiment FIG. 8 shows a seventh embodiment. In the present embodiment, a cylindrical press-fit portion 46 is integrally provided on the inner wall surface of the discharge chamber 25 in the rear housing 15. The distal end of the press-fitting portion 46 penetrates through the valve / port forming body 14 and is press-fitted into the press-fitting hole 12 c of the cylinder block 12. That is, the cylinder block 12 and the rear housing 1
5 is an inner fixing means (press-fit portion 4) provided inside the first partition wall portion 31 and outside the second partition wall portion 32.
6 and press-fit holes 12c). This embodiment also has the same effects as the fifth embodiment.

The press-fitting structure of the inner fixing means (press-fitting section 4
6 and the press-fit holes 12c) may be provided at only one place, or may be provided at a plurality of places as shown in FIG. Further, the press-fitting configuration at the plurality of locations is not limited to the mode (six locations) in FIG. 2 and may be, for example, two, three, four, five, or seven locations.

Eighth Embodiment FIG. 9 shows an eighth embodiment. In the present embodiment, a cylindrical press-fit portion 46 is integrally provided on the inner wall surface of the suction chamber 24 in the rear housing 15. The distal end of the press-fitting portion 46 penetrates through the valve / port forming body 14 and is press-fitted into the press-fitting hole 12 c of the cylinder block 12. That is, the cylinder block 12 and the rear housing 1
5 is fastened and fixed via inner fixing means (press-fitting portion 46, press-fitting hole 12c, etc.) provided inside second partition wall portion 32. This embodiment also has the same effects as the fifth embodiment.

The press-fitting structure of the inner fixing means (press-fitting portion 4)
6 and the press-fit holes 12c) may be provided at only one place, or may be provided at a plurality of places as shown in FIG. Further, the press-fitting configuration at the plurality of locations is not limited to the mode (six locations) in FIG. 2 and may be, for example, two, three, four, five, or seven locations.

Ninth Embodiment FIG. 10 shows a ninth embodiment. In the present embodiment, in a double-headed piston type compressor (hereinafter simply referred to as a compressor) that employs a double-headed piston 21, the present invention is embodied in a joint structure of a housing 11. In addition,
The compressor is of a fixed displacement type in which a swash plate 19 is fixed to a drive shaft 17 so as not to tilt, and a lug plate 18 and a hinge mechanism 20 are omitted.

The housing 11 of the compressor has a front cylinder block 12A and a rear cylinder block 12B joined and fixed to each other and having a cylinder bore 12a, and a front cylinder block 12A.
A front housing 13 joined and fixed to a front end of the rear cylinder block 1 via a valve / port forming body 14, and a rear cylinder block 1
The rear housing 2B has a rear housing 15 joined and fixed via a valve / port forming body 14 to the rear (right side in the drawing) end.

The housing 11 is joined to a front cylinder block 12A as a first component and a front housing 13 as a front end housing as a second component, so that the outside of the front housing 13 is formed. A suction chamber 24 is formed in the annular area, and a discharge chamber 25 is formed inside the suction chamber 24.

The housing 11 has a rear side cylinder block 12B as a first component and a rear housing 15 as a second component joined to form a suction chamber in an outer annular region inside the rear housing 15. A discharge chamber 25 is defined inside the suction chamber 24.

The front housing 13 and the rear housing 15 define an annular first partition wall 31 surrounding the suction chamber 24, and the suction chamber 24 and the discharge chamber 25 inside the first partition wall 31. Annular second partition wall portion 32
Are provided respectively.

The same press-fit structure (press-fit pin 45) as in the fourth embodiment is applied to the inner fixing means between the front housing 13 and the front side cylinder block 12A.
Etc.) have been adopted. Further, the same screw configuration as that of the first embodiment (through bolt 4) is applied to the inner fixing means between the rear housing 15 and the rear cylinder block 12B.
2 etc.) are employed. Also in the present embodiment, the same effect as (1) of the first embodiment can be obtained for the front housing 13 and the rear housing 15.

The present invention can be practiced in the following modes without departing from the spirit of the present invention. For example, as shown in FIG. 2 as another example 4, the inside fixing means of the first embodiment is changed to a plurality of screw configurations (through bolt 42, screw hole 12b, etc.). The configuration of the plurality of screws is not limited to the embodiment shown in FIG. 2 (two locations), but may be three, four, or five locations, for example.

Use of at least two of the various aspects of the inner fixing means described in the first to eighth embodiments. The outer fixing means is changed to a fastening structure by press-fitting similar to the inner fixing means of the fourth to eighth embodiments, for example. If this is embodied in, for example, the fourth to eighth embodiments, the joining and fixing of the components 12, 13, and 15 are all performed by press-fitting, and the assembly process of the housing 11 is greatly simplified.

The rear housing 15 is made of, for example, a resin material or a magnesium-based metal material. In other words, in the rear housing 15 whose rigidity can be reduced by applying the present invention, the degree of freedom in selecting constituent materials conventionally limited to aluminum-based or iron-based metals is increased.

The application of the present invention is not limited to the above-described piston type compressor, but is also applicable to a rotary type compressor such as a scroll type. The technical idea that can be grasped from the above embodiment will be described.

(1) The compressor according to claim 5, wherein the inner fixing means includes a plurality of bolts. (2) The compressor according to claim 6, wherein the inner fixing means includes a plurality of press-fit portions.

(3) The compressor according to claim 5 or 6, wherein the bolt or the press-fit portion is inserted substantially at the center of the inner chamber. (4) The compressor according to claim 9, wherein the outer fixing means fastens and fixes the two components by a bolt inserted between the first component and the second component.

(5) The outer fixing means has a press-fit portion,
The compressor according to claim 9, wherein the two components are fastened and fixed by being press-fitted into at least one of the first component and the second component using the press-fit portion.

(6) The compressor according to any one of (1) to (5) or (1) to (5), wherein the second component is made of a resin material or a magnesium-based metal material. . (7) A compressor characterized in that, in a housing composed of a plurality of components, joining and fixing between the components are performed by press-fitting.

[0069]

According to the present invention having the above-described structure, the second partition wall can be reliably pressed against the first structure without increasing the weight of the second structure.

[Brief description of the drawings]

FIG. 1 is a sectional view of a single-head piston type variable displacement compressor.

FIG. 2 is a sectional view taken along line AA of FIG. 1;

FIG. 3 is an enlarged sectional view of a main part of a compressor according to a second embodiment.

FIG. 4 is an enlarged sectional view of a main part of a compressor according to a third embodiment.

FIG. 5 is an enlarged sectional view of a main part of a compressor according to a fourth embodiment.

FIG. 6 is an enlarged sectional view of a main part of a compressor according to a fifth embodiment.

FIG. 7 is an enlarged sectional view of a main part of a compressor according to a sixth embodiment.

FIG. 8 is an enlarged sectional view of a main part of a compressor according to a seventh embodiment.

FIG. 9 is an enlarged sectional view of a main part of a compressor according to an eighth embodiment.

FIG. 10 is a cross-sectional view of a double-headed piston fixed displacement compressor showing a ninth embodiment.

FIG. 11 is a sectional view of a conventional single-head piston type variable displacement compressor.

[Explanation of symbols]

Reference numeral 11 denotes a housing, 12 denotes a cylinder block as a first component, 12b denotes a screw hole forming an inner fixing means, 1
5 ... rear housing as a second component, 24 ... suction chamber, 25 ... discharge chamber, 31 ... first partition wall, 32 ... second partition wall, 42 ... through bolts forming inner fixing means.

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Fumio Enoshima 2-1-1 Toyota-cho, Kariya-shi, Aichi F-term in Toyota Industries Corporation (reference) 3H003 AA03 AC03 CD01 CE00 3H076 AA06 BB00 CC46

Claims (10)

[Claims] 1. A housing formed by joining and fixing a plurality of components, one of a discharge chamber and a suction chamber is provided outside the second component by joining the first component and the second component. The other of the discharge chamber and the suction chamber is formed on the inner side, and the second structure has an annular first partition wall surrounding the outer chamber, and an outer chamber inside the first partition wall. A compressor provided with a second partition wall for partitioning an inner chamber, comprising: an inner fixing means for fastening and fixing the first component and the second component inside the first partition wall. A compressor characterized in that: 2. The compressor according to claim 1, wherein the inner fixing means fastens and fixes the first component and the second component inside the second partition wall. 3. The inner fixing means fastens and fixes the first component and the second component on the second partition wall.
Or the compressor according to 2. 4. The apparatus according to claim 1, wherein said inner fixing means fastens and fixes the first component and the second component inside the first partition wall and outside the second partition wall. The compressor according to any one of the above. 5. The apparatus according to claim 1, wherein said inner fixing means comprises a first component and a second component.
The compressor according to any one of claims 1 to 4, wherein the two components are fastened and fixed by bolts inserted between the components. 6. The inner fixing means includes a press-fit portion, and the press-fit portion is press-fitted into at least one of the first component and the second component to fasten and fix both components.
A compressor according to any one of claims 1 to 5. 7. The compressor according to claim 6, wherein the press-fitting portion has a press-fit pin interposed between the first component and the second component. 8. The compressor according to claim 6, wherein the press-fit portion is formed integrally with one of the first component and the second component and press-fit into the other. 9. The compressor according to claim 1, further comprising an outer fixing means for fastening and fixing said first component and said second component at a first partition wall. 10. The compressor is of a piston type, the first component is a cylinder block in which a cylinder bore for accommodating a piston is formed, and the second component is an end housing that constitutes an end of the housing. The compressor according to any one of claims 1 to 9, wherein a valve / port forming body is sandwiched between the cylinder block and the end housing by fastening the both.