JP2001263226A - Swash plate used for swash plate type compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a swash plate capable of reducing a coating film forming cost and used for a swash plate type compressor while maintaining reliability to a slide with shoes at a required level or more by forming proper coating films according to respective placed situations to first and second sliding contact surfaces for slidingly contacting with the shoes. SOLUTION: In this swash plate 10, the coating film 31B-1 composed of an aluminum material is formed on a rear side sliding contact surface 30B among sliding contact surfaces 30A and 30B with the shoes 20A and 20B, and only the coating film 31A composed of a solid lubricant is formed on a front side sliding contact surface 30A.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a swash plate for use in a swash plate type compressor constituting a refrigeration cycle of an air conditioner, for example, wherein a single-headed piston is connected via a shoe.

[0002]

2. Description of the Related Art In a compressor of this type, lubrication between a shoe and a swash plate is usually performed by supplying a lubricating oil held therein to a gas (for example, a refrigerant such as Freon gas) flowing with the operation of the compressor. Gas), and the mist lubricating oil is transported between the shoe and the swash plate.

However, when the compressor is restarted after being left in a stopped state for a long time, the lubricating oil existing between the shoe and the swash plate is washed away by the refrigerant gas. There are many. For this reason, until the refrigerant gas returns to the compressor after the start of the compressor and the mist of the lubricating oil proceeds, the gap between the shoe and the swash plate becomes short of lubricating oil.

[0004] For this reason, by forming a film on the sliding contact surface of the swash plate with the shoe, it is possible to ensure the minimum lubrication between the shoe and the swash plate even if the lubrication oil is insufficient. It has been conventionally proposed.

[0005]

On the sliding contact surface of the swash plate with the shoe, a first sliding contact surface located on the side where the piston is disposed and a first sliding contact surface opposite to the first sliding contact surface. The second sliding contact surface is different from the second sliding contact surface in terms of receiving load. That is, a load based on a suction reaction force when the piston is pulled out from the cylinder bore is mainly applied to the second sliding contact surface to suck the refrigerant gas. On the other hand, a load based on a compression reaction force when the piston is to be pushed into the cylinder bore is mainly applied to the first sliding contact surface in order to compress the refrigerant gas. Generally, the load based on the compression reaction force is larger than the load based on the suction reaction force.

In other words, it is the first sliding contact surface that is required to have abrasion resistance for the film, and the second sliding contact surface film has as much wear resistance as the first sliding contact surface film. If not, the minimum lubrication with the shoe can be maintained for a long time.

Conventionally, the above-mentioned considerations were not taken into consideration. Conventionally, the same film configuration as that of the first sliding contact surface was adopted for the second sliding contact surface, and excessive wear resistance of the second sliding contact surface to the coating was adopted. The imparting of properties has been a factor of raising the film formation cost of the swash plate.

An object of the present invention is to form an appropriate film on the first and second sliding contact surfaces that are in sliding contact with the shoe in accordance with the situation where the first and second sliding contact surfaces are placed, thereby improving the reliability of sliding with the shoe. To provide a swash plate used in a swash plate compressor capable of reducing the film formation cost while maintaining the swash plate at a required level or higher.

[0009]

According to a first aspect of the present invention, an aluminum-based material is provided on a first sliding contact surface of a sliding contact surface with a shoe, the first sliding contact surface being located on a side on which a piston is disposed. A metal film made of the material described above is formed, and a film made of a solid lubricant or only a film formed by plating is formed on the second sliding contact surface opposite to the first sliding contact surface. It is characterized by.

[0010] According to a second aspect of the present invention, in the first aspect, the metal film on the first sliding contact surface is formed by using any one of the following methods: pressure contact transition, welding overlay and thermal spraying. And

In forming a film made of an aluminum-based metal material on a swash plate, techniques that can be adopted at present include, for example, a pressure contact transition described in claim 2 and
Either welding overlay or thermal spraying may be used. Both of these methods can form a hard and thick aluminum film that can maintain good lubrication between the first sliding contact surface and the shoe over a long period of time, compared to solid lubricant coating or tin plating. However, on the other hand, the cost of film formation tends to rise. Therefore, the aluminum film is required to have abrasion resistance (for the reason, "means for solving the problem"
The coating on the second sliding contact surface, which is formed on the first sliding contact surface and whose wear resistance is not so required, is only formed by a solid lubricant or plating which can be formed at a low cost, so that the contact with the shoe can be reduced. The film formation cost can be reduced while maintaining the reliability for sliding at a required level or higher.

According to a third aspect of the present invention, in the first or second aspect, the first sliding contact surface is subjected to a roughening treatment. In this configuration, the surface area of the first sliding contact surface is increased, and the adhesion of the aluminum film to the first sliding contact surface is significantly improved.

According to a fourth aspect of the present invention, in any one of the first to third aspects, the metal film on the first sliding contact surface is coated with a film made of a solid lubricant. For example, in the case of a structure in which the aluminum film formed by the method of claim 2 and the shoe slide directly, the aluminum film is hardly deformed (there is one aspect that this property makes the abrasion resistance good). Cracks and the like are likely to occur. Therefore, providing a soft film made of a solid lubricant as the upper layer of the aluminum film, and not directly contacting the aluminum film and the shoe,
This is effective in preventing the above-described cracks and the like from occurring.

According to a fifth aspect of the present invention, in the fourth aspect, the surface of the metal film on the first sliding contact surface is subjected to a roughening treatment. In this configuration, the surface area of the aluminum film is increased, and the adhesion of the solid lubricant film to the aluminum film is significantly improved.

[0015]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a swash plate of a swash plate type compressor according to a first embodiment of the present invention. In the second embodiment, 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) First, a swash plate type compressor will be described. As shown in FIG. 1, a variable capacity swash plate type compressor (hereinafter simply referred to as a compressor) includes a cylinder block 1.
And a front housing 2 joined to a front end thereof, and a rear housing 4 joined to a rear end of the cylinder block 1 via a valve forming body 3, and these are mutually connected by a plurality of through bolts (not shown). It is joined and fixed to form the housing of the compressor.

The housing has a crank chamber 5, a suction chamber 6, and a discharge chamber 7 defined therein. A plurality of cylinder bores 1a (only one is shown) are formed in the cylinder block 1, and a single-headed piston 8 is housed in each bore 1a so as to be able to reciprocate. An aluminum-based material is used for the piston 8 to reduce its weight. The suction chamber 6 and the discharge chamber 7 can selectively communicate with the respective bores 1 a via various flapper valves provided in the valve body 3.

A drive shaft 9 is rotatably supported in the crank chamber 5, and a swash plate 10 serving as a cam plate is accommodated therein. An insertion hole 10a is formed through the center of the swash plate 10, and the drive shaft 9 is inserted through the insertion hole 10a. The swash plate 10 is operatively connected to the drive shaft 9 via a hinge mechanism 13 and a lug plate 11, is rotatable synchronously with the drive shaft 9, and is attached to the drive shaft 9 while sliding in the axial direction of the drive shaft 9. In contrast, it can be tilted. All the pistons 8 are operatively connected to the swash plate 10 by slidably anchoring the outer peripheral portion of the swash plate 10 to each piston 8 via a pair of front and rear shoes 20A, 20B.

When the swash plate 10 inclined at a predetermined angle rotates together with the drive shaft 9, each piston 8 is reciprocated at a stroke corresponding to the inclination angle of the swash plate 10, and the suction chamber 6 (suction pressure) in each bore 1a. The suction of the refrigerant gas from the Ps region), the compression of the sucked refrigerant gas, and the discharge of the compressed refrigerant gas to the discharge chamber 7 (discharge pressure Pd region) are sequentially repeated.

The swash plate 10 is urged by a tilt angle reducing spring 14 in a direction approaching the cylinder block 1 (a tilt angle decreasing direction). However, for example, by restricting the tilt of the swash plate 10 in the direction of decreasing the tilt angle by the circlip 15 fixed on the drive shaft 9, the minimum tilt angle θmi of the swash plate 10
n (for example, 3 to 5 °) is limited. On the other hand, the maximum tilt angle θmax of the swash plate 10 is limited by, for example, the counterweight portion 10b of the swash plate 10 abutting on the regulating portion 11a of the lug plate 11.

The inclination angle of the swash plate 10 is determined by the moment of the rotational movement based on the centrifugal force generated when the swash plate 10 rotates, the moment by the spring force based on the urging action of the inclination angle reducing spring 14, and the reciprocating inertia force of the piston 8. Is determined based on the mutual balance of various moments such as the moment due to the gas pressure and the moment due to the gas pressure.

The above-described moment due to the gas pressure is a moment generated based on the correlation between the internal pressure of the cylinder bore 1a and the internal pressure of the crank chamber 5 (crank pressure Pc), which corresponds to the back pressure of the piston 8. Accordingly, it acts on both the decreasing direction and the increasing direction of the inclination angle. In the swash plate compressor of FIG. 1, the moment due to the gas pressure is appropriately changed by adjusting the crank pressure Pc using a control valve 16 (not described in detail), and the inclination angle of the swash plate 10 is reduced to the minimum inclination angle θmi.
An arbitrary angle θ between n and the maximum inclination angle θmax can be set.

Next, the swash plate 10 of the compressor having the above configuration will be described in detail. As shown in FIGS. 1 to 3, annular sliding contact surfaces 30 </ b> A and 30 </ b> B are formed on the front side and the rear side (side on which the piston 8 is disposed) of the outer peripheral portion of the swash plate 10. That is, the rear sliding surface 30B forms the first sliding surface, and the front sliding surface 30A forms the second sliding surface. The front and rear annular sliding contact surfaces 30A and 30B are in sliding contact with the pair of shoes 20A and 20B, respectively.

The swash plate 10 is made of a relatively heavy iron-based material (for example, cast iron such as FCD700) in order to appropriately generate a moment of rotational movement based on centrifugal force during rotation. On the other hand, the shoes 20A and 20B are also made of an iron-based material (for example, bearing steel) in consideration of the mechanical strength and sliding with the piston 8 made of an aluminum-based material. If the swash plate 10 made of the same kind of metal material and the shoes 20A and 20B are brought into sliding contact with each other under severe conditions, a seizure due to a so-called "together phenomenon" occurs. In this embodiment, as shown in FIG. On at least the sliding contact surfaces 30A and 30B of the swash plate 10, coatings 31A and 31B are formed as sliding layers for improving the contact slidability with the shoes 20A and 20B.

Of the films 31A and 31B, the film 31A formed on the front-side sliding contact surface 30A is made of a solid lubricant. The thickness of the film 31A is, for example, 0.5 to 10 μm. As the solid lubricant, for example, at least one of molybdenum disulfide, tungsten disulfide, graphite, boron nitride, antimony oxide, lead oxide, lead, indium, tin, and a fluororesin is used. In forming the film 31A, a well-known method such as a spray coating method, a roll coating method, or a screen printing method is used for applying a liquid paint containing a solid lubricant.

On the other hand, the coating 31B formed on the rear sliding contact surface 30B has a two-layer structure. In this film 31B, the first layer 31B-1 is formed of the base material of the swash plate 10 and the shoe 2.
It is made of a metal material different in type from the iron-based material constituting 0A and 20B. Examples of the metal material constituting the first coating layer 31B-1 include a silicon-containing aluminum alloy and an intermetallic compound of aluminum and silicon (hereinafter, both are referred to as “Al—Si-based metal materials”). Can be In the case of an Al-Si-based metal material as an aluminum-based material, physical properties such as hardness and melting point of the material vary in accordance with the silicon content, but the Al-Si-based metal material used here has a silicon content. 10 to 20% by weight (preferably 15 to 18% by weight).

In the film 31B, the second layer 31B-2
Is formed on the first layer 31B-1. This coating second layer 31B-2 is made of a solid lubricant like the front coating 31A, and is, for example, 0.5 to 10 μm.
Having the following film thickness.

By forming the coatings 31A and 31B on the swash plate sliding contact surfaces 30A and 30B, not only the seizure due to the above-mentioned splatter phenomenon but also the shoe 20A can be prevented.
A, The contact sliding property with 20B is improved. That is, the swash plate 10 and the shoe 2 are formed by forming the coatings 31A and 31B.
A certain degree of lubricity is ensured between 0A and 20B even in an oilless environment.

Next, a procedure for forming a film on the rear sliding surface 30B of the swash plate 10 will be specifically described. In addition, a rough surface treatment such as shot blasting is performed as a pretreatment on the rear sliding contact surface 30B used for forming the film.

Step of Forming First Coating Layer 31b-1 First, one supply body 40 as shown in FIG. 3 is prepared. The supply body 40 is entirely made of the Al-Si-based metal material and has a round bar shape. One end face 41 of the round bar-shaped supply body 40 has a width (a difference between the radius of the outer shape line and the radius of the inner shape line) of the rear sliding contact surface 30B which is the annular surface of the swash plate 10. The circles have substantially the same diameter.

As shown in FIG. 4, the swash plate 10 is set on a rotation holding mechanism 51 (conceptually indicated by a two-dot chain line), and the supply body 40 is moved by a slide / rotation holding mechanism 52 (conceptually indicated by a two-dot chain line). ).

The rotation holding mechanism 51 is operatively connected to the first motor M1, and rotates the held swash plate 10 about the axis L based on the driving force of the first motor M1. When the swash plate 10 is set on the rotation holding mechanism 51, the annular sliding contact surface 30B surrounds the axis L and exists as a surface orthogonal to the axis L. Further, a part of the sliding contact surface 30B faces the supply body end surface 41 while being separated from the end surface 41.

The slide / rotation holding mechanism 52 is operatively connected to a front / rear slide means 53 and a second motor M2. , And presses and separates, and rotates the supply body 40 about the axis L ′ based on the driving force of the second motor M2.

The end face 41 of the supply body 40 exists as a plane orthogonal to the axis L '.
When set on the rotation holding mechanism 52, the end face 41
And the swash plate sliding contact surface 30B are in a parallel state. Also,
When the supply body 40 is set on the slide / rotation holding mechanism 52, the axis L 'of the supply body 40 and the axis L are eccentric, and when the supply body 40 is advanced toward the swash plate 10, The end surface 41 can be joined to a part of the annular sliding contact surface 30B of the swash plate 10 (a state shown by a two-dot chain line (41) in FIG. 3).

After setting the swash plate 10 and the supply body 40 to the respective mechanisms 51 and 52, the second motor M
2 and the slide / rotation holding mechanism 52 rotate the supply body 40 at a predetermined rotation speed (for example, 1500 rpm).
While maintaining the rotation of the supply body 40,
3 together with the slide / rotation holding mechanism 52
0 is advanced (closed) toward the swash plate 10. Then, even after the end surface 41 is joined to the sliding contact surface 30B, the supply body 40 is pressed against the sliding contact surface 30B, so that the pressing force of the supply body end surface 41 against the swash plate sliding contact surface 30B is increased to a predetermined pressure (for example, 18 MPa). To reach.

The swash plate 10 is rotated at a predetermined rotation speed (for example, 1 rpm) by the first motor M1 and the rotation holding mechanism 51 in a state where the end face 41 of the supply body and the swash plate sliding contact surface 30B are pressed against each other. That is, the supply body 40 and the swash plate sliding contact surface 30B are
It is relatively moved in the extending direction (circumferential direction) of the sliding contact surface 30B.

Therefore, mainly due to the high speed rotation of the feeder 40, the feeder end face 41 in the pressed state and the swash plate sliding contact face 30
B generates frictional heat, and the frictional heat causes the vicinity of the end face 41 of the supply body 40 to be softened and transferred to the sliding contact surface 30B. Further, in accordance with the rotation of the swash plate 10, the pressure contact position of the supply body end surface 41 on the sliding contact surface 30B is changed to the annular sliding contact surface 30B.
Is continuously changed in the circumferential direction, so that the softened feeder 4
0 so that the vicinity of the end face 41 is worn away,
It is sequentially left behind at the press-contact trace with the supply end face 41 at 0B.

When the swash plate 10 makes at least one rotation, the transfer of the metal material from the supply body 40 to the entire annular sliding contact surface 30B is performed once, and the required thickness (for example, 50 μm) is applied to the entire sliding contact surface 30B. ) And post-machining allowance (for example, 20 to
50 μm) (for example, 70-100 μm)
First layer 30B-1 made of Al-Si based metal material
Is formed.

The required film thickness of the first film layer 31B-1 is as follows:
The first film layer 31B-1 formed by the method described above.
Is adjusted by performing a cutting process or a polishing process as a post-process.

Step of Forming the Second Coating Layer 31b-2 The surface of the first coating layer 31B-1 formed as described above is subjected to a roughening treatment such as shot blasting. A liquid paint containing a solid lubricant is applied to the roughened surface of the first coating layer 31B-1 by the same method as that of the front coating 31A. Then, baking is performed after this coating, so that the first film layer 31B-1 is coated with the second film layer 31B-2. This coating second layer 31
A cutting process or a polishing process is performed on B-2 as a post-process, and the required film thickness of the second film layer 31B-2, that is, the film thickness of the film 31B is adjusted.

The present embodiment having the above configuration has the following effects. (1) First coating layer 3 made of aluminum-based metal material
In forming 1B-1, as a technique that can be implemented at the present time, for example, the pressure welding transition described in the present embodiment, welding overlay and thermal spraying described later are given. Both of these methods can form a hard and thick film capable of maintaining abrasion resistance over a long period of time as compared with solid lubricant coating or tin plating, but the film formation cost is low. Tends to rise. Therefore, the first coating layer 31B-1 made of the aluminum-based metal material is applied only to the rear-side sliding contact surface 30B which is required to have abrasion resistance (the reason is described in "Means for Solving the Problems"). The coatings 31A of the front-side sliding contact surface 30A, which is formed and does not require much wear resistance, are made of a solid lubricant that can be formed at low cost, so that the shoes 20A, 20B
The film formation cost was able to be reduced while maintaining the reliability with respect to sliding with the required level or more.

(2) For example, when the first film layer 31B-1 slides directly on the shoe 20B, the first film layer 31B-1
No. 1 is liable to be cracked or the like due to its hardly deformable property (there is one aspect that this property makes the wear resistance good). Therefore,
As the upper layer of the first coating layer 31B-1, a second soft coating layer 31B-2 made of a solid lubricant is provided.
Not to make 1B-1 and shoe 20B directly contact,
This is effective in preventing the above-described cracks and the like from occurring.

(3) The rear-side sliding contact surface 30B is roughened to increase the contact area with the first coating layer 31B-1. Therefore, the first coating film on the rear sliding surface 30B
The adhesion of the layer 31B-1 is remarkably improved.

(4) The surface of the first coating layer 31B-1 is roughened to increase the contact area with the second coating layer 31B-2. Therefore, the adhesion of the second coating layer 31B-2 to the first coating layer 31B-1 is remarkably improved.

(5) To form the first coating layer 31B-1
The technique of pressure welding transition of a metal material is used. Therefore, the following effects are obtained. (5-1) The first coating layer 31B-1 is formed by pressing the metal material (supply body 40) against the rear-side sliding contact surface 30B, and the metal material is large as in the thermal spraying technique. Spraying noise is not generated, and at the time of this blowing, the powdered metal material does not scatter to the surroundings, so that the yield of the material and the working environment are not deteriorated.

(5-2) The metal material of the supply body 40, which has been pressed and transferred to a part of the rear-side sliding contact surface 30B, is surely cut off from the supply body 40 in a rubbing manner, and the swash plate sliding contact surface 30B
Can be reliably left behind in the press contact trace with the supply body 40 in the above. Therefore, a predetermined amount of metal material can be reliably transferred from the supply body 40 to the sliding contact surface 30B, and the first coating layer 31B-1 having a desired thickness is formed on the entire annular sliding contact surface 30B.
Can be obtained.

(5-3) Rod-shaped metal material (supply body 40)
Since the film formation (pressure transfer) is performed by using, there is no need to use an expensive metal material due to powder processing unlike the thermal spraying technique. In addition, rod-shaped metal materials are easier to handle than powders, which leads to more efficient film formation work and an improved work environment.

(Second Embodiment) In the present embodiment, the first coating layer 30B on the rear sliding contact surface 30B of the swash plate 10 is used.
The weld overlay method is used for forming -1.

FIG. 5 is a diagram schematically showing a film forming apparatus. That is, the rotation holding mechanism 51 is used in a state where the axis L is inclined upward by 90 ° from the state of the first embodiment (see FIG. 4). The covered arc welding means includes a welding rod 54 and a welding power source 55 for applying a voltage between the welding rod 54 and the swash plate 10. Welding rod 54
Is formed by applying a flux (coating agent) 54b to the outer peripheral surface of a core wire 54a made of the Al-Si-based metal material.
The welding rod 54 is held by an elevating and holding mechanism 56 (conceptually indicated by a two-dot chain line). The elevating and holding mechanism 56 is operatively connected to an elevating means 57.

When the welding rod 54 is set on the elevating and lowering holding mechanism 56, the welding rod 54 is disposed at an eccentric position with respect to the axis L of the swash plate 10 set on the rotation and holding mechanism 51, and the swash plate sliding contact surface 30B is It opposes above a part. The lifting and lowering mechanism 56 is moved up and down in the drawing together with the held welding rod 54 by the operation of the lifting and lowering means 57, so that the welding rod 54 approaches and separates from a part of the swash plate sliding contact surface 30B.

When the welding rod 54 is lowered (approached) to a part of the swash plate sliding contact surface 30B by the elevating means 57 and the welding power source 55 is activated, the gap between the welding rod 54 and the swash plate 10 is reduced. An arc is generated. Due to this arc heat, a part of the metal material of the welding rod 54 (core wire 54a) is melted and dropped onto the swash plate sliding contact surface 30B (in other words, the metal is overlaid). The metal material of the welding rod 54 dropped on the swash plate sliding contact surface 30B is fused with the metal material of the swash plate sliding contact surface 30B that is also melted by the arc heat. Further, the rotation holding mechanism 51 rotates together with the swash plate 10 by the operation of the motor M1, and the corresponding position of the welding rod 54 on the sliding contact surface 30B (the position where the metal material is melted and dropped) is changed to the annular sliding contact surface 30B.
Changes continuously in the circumferential direction.

When the swash plate 10 makes at least one rotation, the metal material from the welding rod 54 is melted and dropped (build-up) on the entire annular sliding contact surface 30B.
Coating first layer 31B entirely made of Al-Si metal material
-1 is formed.

In this embodiment, the same effects as (1) to (4) of the first embodiment are obtained, and the first coating layer 3 is formed.
1B-1 is formed by a welding method. Therefore, the following effects are obtained.

(1) The first material layer 31B is formed by directly overlaying a metal material (welding rod 54) on the rear sliding surface 30B.
-1 is formed, so that a loud spray noise of the metal material is not generated unlike the thermal spraying technique. At the time of the spraying, the powdered metal material scatters around, thereby deteriorating the yield of the material and the working environment. It does not cause deterioration.

(2) Since the coating is formed (weld buildup) using a rod-shaped metal material (welding rod 54), it is not necessary to use an expensive metal material due to powder processing unlike the thermal spraying technique. . In addition, rod-shaped metal materials are easier to handle than powders, which leads to more efficient film formation work and an improved work environment.

The present invention can be practiced in the following modes without departing from the spirit of the present invention. -The method of thermal spraying is used for forming the first coating layer 31B-1. This thermal spraying is a technique in which a powdery metal material or the like is melted and sprayed together with a flame onto the rear sliding surface 30B.

The film 31A on the front side is formed by electrolytic or electroless plating of tin or the like. In the second embodiment, examples of arc welding other than covered arc welding include gas shielded arc welding and submerged arc welding. Examples of gas shielded arc welding include MIG welding, MAG welding, and TIG welding. Using any one of these welding methods, the first layer 3
0B-1 may be formed (weld buildup).

The present invention is embodied in a swash plate 10 made of an aluminum-based material instead of an iron-based material. The technical idea that can be grasped from the above embodiment will be described.

(1) In the pressure contact transition, a supply member made of an aluminum-based material is pressed against a part of the first sliding contact surface of the swash plate, and further, the supply member and the first sliding contact surface are brought into contact with the first sliding contact surface. 3. The swash plate compression method according to claim 2, wherein a relative movement in a circumferential direction of the sliding contact surface causes the supply body to sequentially transfer a part of the metal material onto the first sliding contact surface to form a coating. A swash plate used in machines.

(2) The film according to any one of (1) to (5) and (1), wherein the film formed on the first and second sliding contact surfaces is for improving the slidability in contact with a shoe. A swash plate used in the swash plate type compressor according to any one of claims 1 to 3.

(3) The swash plate type compressor according to any one of (1) and (2), wherein each of the sliding contact surfaces is made of an iron-based material like the shoe. Swashplate used.

(4) The swash plate type compressor according to any one of (1) to (3), wherein the swash plate type compressor is a variable capacity type.

[0063]

As described above in detail, according to the present invention, the first and second sliding contact surfaces that are in sliding contact with the shoe are formed by appropriate film formation in accordance with the situation where they are placed. Thus, the film formation cost could be reduced while maintaining the reliability of sliding with the shoe at the required level or more.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a variable capacity swash plate type compressor.

FIG. 2 is an enlarged sectional view showing the vicinity of an outer peripheral portion of a swash plate in contact with a shoe.

FIG. 3 is a front view and a perspective view showing a rear surface of a swash plate and an entire supply body.

FIG. 4 is a view conceptually showing a film forming apparatus.

FIG. 5 is a view conceptually showing a film forming apparatus according to a second embodiment.

[Explanation of symbols]

8: piston, 10: swash plate, 20A, B: shoe, 30
A: Front sliding surface as second sliding surface, 30B: Rear sliding surface as first sliding surface, 31A: Film formed on front sliding surface, 31B-1: Metal film Certain first layer.

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Naohiko Isomura 2-1-1 Toyota-cho, Kariya-shi, Aichi Prefecture Inside Toyota Industries Corporation (72) Inventor Shigeki Kawachi 2-1-1 Toyota-cho, Kariya-shi, Aichi Inside Toyota Industries Corporation (72) Inventor Hiroaki Masukawa 2-1-1 Toyota-cho, Kariya-shi, Aichi F-term inside Toyota Industries Corporation 3H076 AA06 BB17 BB26 BB50 CC20 CC33

Claims (5)

[Claims] 1. A swash plate for use in a swash plate compressor, wherein a single-headed piston is connected via a shoe, and a swash plate, which is located on a side where the piston is disposed, of a sliding contact surface with the shoe. A metal film made of an aluminum-based material is formed on one sliding contact surface, and a film made of solid lubricant or plating is formed on a second sliding contact surface opposite to the first sliding contact surface. A swash plate used in a swash plate compressor, wherein only a film is formed. 2. The swash plate type compressor according to claim 1, wherein the metal film on the first sliding contact surface is formed by using any one of a press contact transition, a weld overlay and a thermal spraying method. Board. 3. The swash plate used in the swash plate compressor according to claim 1, wherein the first sliding contact surface is subjected to a roughening treatment. 4. The swash plate used in the swash plate compressor according to claim 1, wherein the metal film on the first sliding contact surface is coated with a film made of a solid lubricant. 5. The swash plate used in the swash plate compressor according to claim 4, wherein a surface of the metal film on the first sliding contact surface is roughened.