JPH0849671A - Scroll type compressor - Google Patents

Abstract

PURPOSE:To prevent the occurrence of wear owing to slide contact of the inner wall of a front housing or the base plate of a moving scroll with a ring. CONSTITUTION:The surface of the inner wall 20 of a front housing 2 is filled at intervals of a specified distance with fixed pins 22. The reverse surface of the base plate 11 of a moving scroll 10 is filled at intervals of a specified distance with moving pins 23. In such a way that an annular ring 24 is loosely fitted in the fixed pin 22 and the moving pin 23, the rotation blocking mechanism 21 of the moving scroll 10 is formed. Further, a wear preventing means is formed in such a way that the outer edge parts 27 and 28 and the inner edge parts 29 and 30 of the two flanks 25 and 26 of a ring 24 are formed in a curved surface.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scroll type compressor having a fixed scroll and a movable scroll.

[0002]

2. Description of the Related Art As a rotation preventing mechanism for a movable scroll in a scroll compressor, there is one as shown in FIG. That is, a plurality of fixed pins 52 are fixed to the surface of the inner wall 51 of the front housing 50, and a plurality of movable pins 55 are fixed to the back surface of the base plate 54 of the movable scroll 53. A ring 5 is attached to the fixed pin 52 and the movable pin 55.
6 is loosely fitted. Therefore, the position of the movable pin 55 is restricted in the ring 56 by the fixed pin 52, and the rotation of the movable scroll 53 is prevented. Therefore, the movable scroll 53 only revolves while being prevented from rotating within the range of the inner diameter of the ring 56. At this time, the ring 56 is also revolved.

[0003]

However, the ring 56
There is a certain amount of clearance between the inner wall 51 and the substrate 54 to allow smooth revolving or thermal expansion of the ring 56. Therefore, for example, the movable scroll 53
Is tilted due to the reaction force of liquid compression, the movable scroll 53
According to the inclination of the movable pin 55 fixed to the ring 56,
Will be revolved in a tilted state. Therefore, the outer edge-shaped edge portion 58 of the ring side surface 57 is slidably contacted with the inner wall 51 or the substrate 54, and the inner wall 51 or the substrate 54 is scraped and worn by the edge portion 58. When the inner wall 51 or the substrate 54 is worn, the gap between the ring 56 and the ring 56 expands, the inclination of the ring 56 increases, and the wear is further promoted, resulting in a vicious circle.

Further, in general, the ring 5 is made of an iron material.
6, the front housing 50 and the movable scroll 53 are made of an aluminum material or an aluminum alloy that is softer than an iron-based material, and the difference in the materials further promotes the abrasion of the inner wall 51 and the substrate 54.

When abrasion debris is generated due to abrasion of the inner wall 51 or the substrate 54, the abrasion debris becomes foreign matter in the compressor and enters a movable portion, smooth movement is prevented, and seizure occurs. . In addition, the frictional force that causes wear causes orbital resistance of the movable scroll 53, leading to a reduction in compression capacity and energy loss. Further, the strength of the front housing 50 or the movable scroll 53 is reduced due to the abrasion, and as a result, the durability of the compressor is reduced. As described above, various problems occur due to the abrasion of the inner wall 51 of the front housing 50 or the substrate 54 of the movable scroll 53.

The present invention has been made in view of the above problems existing in the prior art, and its purpose is to prevent abrasion of the inner wall of the front housing or the substrate of the movable scroll due to sliding contact with the ring. It is to provide a scroll type compressor capable of performing the above.

[0007]

In order to achieve the above object, according to the invention of claim 1, a plurality of fixing pins projecting from the inner wall of the housing and projecting from the base plate of the movable scroll corresponding to the fixing pins. The movable pin and the ring that is loosely fitted to the fixed pin and the movable pin constitute a rotation preventing mechanism of the movable scroll. Further, between the inner wall and the movable scroll, It is a scroll type compressor provided with wear preventing means for preventing wear.

In the invention of claim 2, the wear preventing means is provided on the ring. In the invention of claim 3, the wear preventing means is configured by forming the edge portion of the side surface of the ring into a curved surface.

According to a fourth aspect of the present invention, the ring is made of an iron material, the front housing having an inner wall and the movable scroll are made of an aluminum material or an aluminum alloy, and the edges of both sides of the ring are formed into curved surfaces. Is.

According to the fifth aspect of the invention, at least the outer edge portion of the side surface of the ring is formed into a curved surface. In the invention of claim 6, the wear preventing means is provided on at least one of the inner wall surface and the substrate surface, and is configured to improve the wear resistance of the inner wall or the substrate.

According to a seventh aspect of the invention, the wear preventing means is a hardening treatment. According to the invention of claim 8,
The curing treatment is to apply a cured coating. Claim 9
In the invention, the hardening treatment is to provide a plate made of an iron-based material.

According to a tenth aspect of the present invention, the ring is made of an iron material, the front housing having an inner wall and the movable scroll are made of an aluminum material or an aluminum alloy, and the inner wall surface and the substrate surface are hardened. .

According to an eleventh aspect of the present invention, the wear preventing means is provided on either the fixed pin or the movable pin. According to a twelfth aspect of the present invention, the wear preventing means is configured by providing a concave portion for guiding and holding the ring at the tip of either the fixed pin or the movable pin.

In the thirteenth aspect of the present invention, the ring is made of an iron material, and the front housing having the inner wall and the movable scroll are made of an aluminum material or an aluminum alloy.

According to a fourteenth aspect of the present invention, in the wear preventing means, a regulation plate is interposed between the inner wall and the base plate of the movable scroll, and the inner edge portion of the regulation hole formed in the regulation plate and allowing the revolution of the ring. Is configured to guide the recess formed on the outer peripheral surface of the ring, and the movement of the ring toward the inner wall side or the substrate side is restricted by the inner wall surface of the recess contacting the inner edge of the hole. It is a thing.

According to a fifteenth aspect of the present invention, the front housing having the inner wall and the movable scroll are made of an aluminum material or an aluminum alloy, and the restriction plate and the ring are made of an iron-based material.

[0017]

In the invention of claim 1 having the above-mentioned structure, the movable pin is restricted by the fixed pin through the ring, and rotation of the movable scroll is prevented. Therefore, with the revolution of the movable scroll, the movable pin fixed to the movable scroll also revolves around the fixed pin fixed to the inner wall while being restricted by the ring together with the ring. That is, the movable scroll only revolves while being prevented from rotating. Then, the abrasion preventing means can reduce abrasion due to sliding contact with the inner wall or the ring of the substrate.

According to the second aspect of the present invention, the wear preventing means provided on the ring can reduce the wear of the inner wall or the substrate slidably contacting the ring. In the invention of claim 3, the edge portion of the side surface of the ring is formed into a curved surface. Therefore, even if the edge portion of the ring is brought into sliding contact with the inner wall or the substrate, it is not scraped. Therefore, abrasion of the inner wall and the substrate can be reduced.

According to the fourth aspect of the invention, the edge portions on both side surfaces of the ring are formed into curved surfaces. Therefore, even if the ring made of an iron-based material is brought into sliding contact with the inner wall made of an aluminum material or an aluminum alloy softer than the iron-based material and the movable scroll, the ring is not scraped. Therefore, abrasion of the inner wall and the movable scroll can be reduced. Moreover, since the ring is made of an iron-based material, durability is improved,
Since the inner wall and the movable scroll are made of an aluminum material or an aluminum alloy, the weight of the compressor can be reduced.

In the invention of claim 5, by forming at least the outer edge portion of the side surface of the ring into a curved surface, even if the ring slidably contacts the inner wall or the substrate, the ring is not scraped, and the inner wall or the substrate is not scraped. Wear can be reduced.

According to the invention of claim 6, the abrasion resistance of the inner wall or the substrate is improved, and the abrasion due to the sliding contact of the ring can be reduced. According to the seventh aspect of the invention, the abrasion resistance of the inner wall surface or the substrate surface is improved by the hardening treatment, and the abrasion due to the sliding contact of the ring can be reduced.

In the eighth aspect of the present invention, the wear resistance is improved by applying the cured coating to the inner wall surface or the substrate surface, and the wear due to the sliding contact of the ring can be reduced. In the invention of claim 9, by providing a plate made of an iron-based material on the inner wall surface or the substrate surface, for example, when the front housing or the movable scroll is made of an aluminum material or an aluminum alloy, a compressor made of aluminum or an aluminum alloy. The advantages of both materials such as reduction of weight and improvement of abrasion resistance by providing a plate made of iron-based material can be utilized.

According to the tenth aspect of the invention, the ring is made of an iron-based material, so that the durability is improved, and the front housing and the movable scroll are made of an aluminum material or an aluminum alloy, so that the weight of the compressor can be reduced. By exerting this effect and hardening the inner wall surface and the substrate surface, it is possible to reduce the abrasion due to the sliding contact of the inner wall surface and the substrate surface with the ring.

According to the eleventh aspect of the present invention, abrasion of the inner wall or the substrate can be prevented by the abrasion preventing means provided on one of the pins. In the invention of claim 12, the ring is guided and held by the concave portion provided in the fixed pin or the movable pin, so that the ring is not slidably contacted with the inner wall or the substrate. Therefore, abrasion of the inner wall surface and the substrate can be prevented.

According to the thirteenth aspect of the invention, since the ring is made of an iron material, the durability is improved, and since the front housing and the movable scroll are made of an aluminum material or an aluminum alloy, the weight of the compressor can be reduced. The ring is not brought into sliding contact with the inner wall or the substrate while exhibiting this effect. Therefore, abrasion of the inner wall surface and the substrate can be prevented.

According to the fourteenth aspect of the present invention, the recess of the ring is guided by the inner edge of the regulating plate, and the inner wall of the recess contacts the inner edge of the hole when the ring is moved toward the inner wall or the substrate. It is contacted and regulated. Therefore, the ring does not come into sliding contact with the inner wall or the substrate. Therefore, abrasion of the inner wall surface and the substrate can be prevented.

According to the fifteenth aspect of the invention, since the regulation plate and the ring are made of an iron-based material, the durability is improved.
Further, since the front housing and the movable scroll are made of aluminum material or aluminum alloy, the weight of the compressor can be reduced. This effect can be achieved, and at the same time, abrasion of the inner wall surface and the substrate can be prevented.

[0028]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment embodying the present invention will be described below with reference to the drawings. As shown in FIG. 1, a front housing 2 and a rear housing 3 made of an aluminum material (in this embodiment, the aluminum material includes an aluminum alloy) are joined and fixed to both front and rear end surfaces of a fixed scroll 1 also serving as a center housing. There is. A rotary shaft 4 is rotatably supported by a bearing 5 in the front housing 2. The eccentric shaft 6 is fixed to the eccentric position of the inner end surface of the rotating shaft 4. The balance weight 7 and the bush 8 are rotatably supported by the eccentric shaft 6, and are prevented from coming off by a locking member 9 engaged with the tip end of the eccentric shaft 6.

On the outer peripheral surface of the bush 8, a cylindrical boss portion 12 integrally formed at the center of the rear surface of the base plate 11 of the movable scroll 10 made of an aluminum material is provided with a bearing 13.
It is fitted so as to be rotatable relative to each other. Then, the base plate 1 of the fixed scroll 1 and the movable scroll 10 facing each other.
The compression chamber 100 is formed by 4, 11 and the spiral walls 15, 16.

The discharge port 17 is formed in the central portion of the base plate 14 of the fixed scroll 1, and the discharge chamber 18 and the compression chamber 100 are formed in the rear housing 3 through the discharge port 17.
And are in communication. The discharge port 17 is openably closed by a discharge valve 19 on the discharge chamber 18 side.

As shown in FIG. 2, between the inner wall 20 of the front housing 2 facing the movable scroll 10 and the rear surface of the substrate 11 of the movable scroll 10, the rotation of the movable scroll 10 is prevented and the revolution thereof is allowed. However, the compression reaction force in the thrust direction 200 during the operation of the compressor is applied to the inner wall 20.
A rotation prevention mechanism 21 for propagating to the is interposed.

As shown in FIGS. 1 to 3, the rotation preventing mechanism 2
Reference numeral 1 denotes a fixed pin 22 made of an iron-based material, which is planted on the surface of the inner wall 20 of the front housing 2 at regular intervals, and a movable pin made of an iron-based material, which is planted on the rear surface of the base plate 11 of the movable scroll 10 at regular intervals. 23 and a ring 24 made of an iron material and loosely fitted to the fixed pin 22 and the movable pin 23. In this embodiment, four fixed pins 22 and four movable pins 23 are provided at 90 ° intervals.
Then, the outer edge portions 2 of the side surfaces 25, 26 of the ring 24
The wear preventing means is formed by forming 7, 28 and the inner edge portions 29, 30 into curved surfaces. This inner and outer edge 27
The curved surfaces 30 to 30 have an arcuate cross section, more specifically, a semicircle.

Due to the action of the fixed pin 22, the movable pin 23 and the ring 24, the movable scroll 10 is prevented from rotating, and the revolution of the movable scroll 10 is allowed. Therefore, as the movable scroll 10 revolves, the movable pin 23 fixed to the movable scroll 10 also revolves around the fixed pin 22 fixed to the inner wall 20 together with the ring 24 while being restricted by the ring 24.

In the compressor having the above structure, the movable scroll 10 revolves around the rotating shaft 4 as the eccentric shaft 6 revolves, and the refrigerant gas introduced from the suction port (not shown) is compressed between the scrolls 1. It flows into the chamber 100. Compression chamber 10
0 decreases in volume as the movable scroll 10 revolves, and converges toward the start end portions of the scroll walls 15 and 16 of both scrolls 1 and 10. The refrigerant gas compressed by the reduction in the volume of the compression chamber 100 is discharged from the discharge port 17 into the discharge chamber 18.

During operation of the compressor, for example, when the movable scroll 10 tilts and revolves due to the reaction force of liquid compression in the compression chamber 100, the ring 24 is tilted by tilting of the movable pin 23 fixed to the movable scroll 10. Revolves in an inclined state,
The outer edge portions 27 and 28 of the ring 24 are brought into sliding contact with the inner wall 20 or the base plate 11 of the movable scroll 10 with a large pressure.
However, since the outer edge portions 27 and 28 of the ring 24 are formed into curved surfaces, the inner wall 20 or the substrate 11 is not scratched. Therefore, the wear of the inner wall 20 or the substrate 11 can be significantly reduced.

The movable scroll 10 has a thrust direction 20.
A compressive reaction force to 0 acts so that the substrate 11 moves to the ring 24.
Is pressed against the inner wall 20, and in that state the movable scroll 10
And the ring 24 is revolved. Also at this time, the side surfaces 25 and 26 of the ring 24 made of an iron-based material are slidably contacted with the inner wall 20 made of an aluminum material and the substrate 11. However, since the inner and outer edge portions 27 to 30 of the ring 24 are formed into curved surfaces, the degree of wear of the inner wall 20 or the substrate 11 can be significantly suppressed.

As described above, according to this embodiment, the inner wall 20
Alternatively, the abrasion due to the sliding contact of the substrate 11 with the ring 24 can be reduced. Therefore, generation of foreign matter due to wear can be suppressed, and seizure of the movable portion due to foreign matter can be prevented. Further, it is possible to reduce frictional resistance, allow smooth revolving of the movable scroll 10, and suppress deterioration of the compression capacity of the compressor. Further, since the front housing 2 and the movable scroll 10 are not scraped, the deterioration of their strength can be reduced and the durability of the compressor is improved.

Therefore, even if the front housing 2 and the movable scroll 10 are made of a soft aluminum material, which is lighter than an iron-based material, as in the present embodiment, the wear thereof is not in danger and the compression is suppressed. It can contribute to weight reduction of the machine and improvement of compression capacity.

Further, since the ring 24 is made of an iron material, the durability is improved, and the fixed pin 22 and the movable pin 23 are made of iron materials. For this reason, the ring 24
There is no risk of welding of the pins 22 and 23 to each other, and wear due to contact is small.

In the drawings, the inner wall 20 and the ring 2 are
4 and the gap between the substrate 11 and the ring 24 are exaggerated for easy understanding.

[0041]

Another Embodiment Another embodiment of the present invention will be described below with reference to the drawings. Only the differences from the first embodiment will be described.

FIG. 4 shows a second embodiment. In the present embodiment and the third embodiment described below, the ring 35
The first point is that the side edge 37 has an edge.
Different from the embodiment. And in this embodiment, the inner wall 2
0 and the back surface of the substrate 11 of the movable crawl 10 are subjected to a nickel-phosphorus plating 36 as a hardening treatment to form a wear preventing means. Therefore, the nickel-phosphorus plating 36 improves the abrasion resistance of the surfaces of the inner wall 20 and the substrate 11 made of an aluminum material. Therefore, it is possible to reduce wear due to the sliding contact of the ring 35 on the inner wall 20 and the substrate 11.

A third embodiment is shown in FIGS. 5 and 6. In this embodiment, a pair of flange portions 39 and 40 are provided around the fixing pin 38 to form wear preventing means. An edge portion 42 of the flange 40 on the movable scroll 10 side has an arc shape. And the ring 35 is
It is loosely fitted in a recess 41 formed by the flange portions 39 and 40, and revolves while being guided by the recess 41. In this embodiment, the ring 35 is guided and held by the pair of flange portions 39 and 40 provided on the fixing pin 38. Therefore, even if the ring 35 is moved or tilted toward the inner wall 20 or the substrate 11, the inner wall surfaces of the flange portions 39 and 40 are brought into contact with the side surfaces of the ring 35 to restrict the movement or tilt of the ring 35. Ring 35 for
Does not slidably contact the inner wall 20 or the substrate 11. As described above, the ring 35 is not in sliding contact with the inner wall 20 and the substrate 11, and the inner wall 20 and the substrate 11 are not likely to wear.

Also, the movable scroll 10 of the flange 40
Since the edge portion 42 on the side has an arc shape, even if the substrate 11 is slidably contacted, the edge portion 42 does not wear the substrate 11.

A fourth embodiment is shown in FIGS. 7 and 8. In this embodiment, a regulating plate 44 made of a donut-shaped iron-based material is interposed between the joint end faces of the front housing 2 and the center housing 1. This regulation plate 44
A through hole 45 is formed in the center of the through hole 45. The through hole 45 has a diameter that allows the bush 8 and the boss portion 12 of the movable scroll 10 to be fitted and the movable scroll 10 and the bush 8 to revolve. ing. Further, in the circumferential direction of the restriction plate 44, restriction holes 46 for restricting the revolution of the ring 47 are formed at equal intervals (four positions in this embodiment). On the other hand, a concave portion 48 is provided around the outer peripheral surface of the annular ring 47.
Then, the ring 47 revolves while the concave portion 48 thereof is guided by the opening edge portion of the regulation hole 46.

At this time, the ring 47 becomes the inner wall 20 or the substrate 1.
Even if it is moved to one side or tilted, the opening edge of the restriction hole 46 is abutted against the inner wall of the recess 48 and is suppressed. In this embodiment, since the ring 47 is guided and held by the restriction plate 46 as the wear preventing means and the recess 48 of the ring 47, the ring 47 is not slidably contacted with the inner wall 20 and the substrate 11. Therefore, the inner wall 20 and the substrate 11 are not worn.

The present invention is not limited to the above embodiments, but can be carried out in the following modes without departing from the spirit of the present invention. (1) In each of the above-described embodiments, the rotation prevention mechanism 21 includes the fixed pin 22, the movable pin 23, and the ring 2 that covers the movable pin 23.
One set of 4, 35, and 47 was provided between the inner wall 20 and the substrate 11 at four places. However, the fixed pin 22 and the movable pin 23 are not limited to this.
And the rings 24, 35, 47 at three locations in the circumferential direction (120
The rotation prevention mechanism 21 may be configured by providing about 12 to 30 places (intervals of 30 °). (2) In the first embodiment, only the outer edge portions 27 and 28 of the ring 24 are formed into curved surfaces. (3) In the first embodiment, the front housing 2
Alternatively, only one of the movable scrolls 10 is made of an aluminum material or an aluminum alloy, and only the edge portions 27 to 30 of the one ring side surfaces 25, 26 facing the movable scroll 10 are made to be curved surfaces. In this case, the outer edge portions 27, 2
Only 8 is acceptable. (4) In the second embodiment described above, the hardening treatment was nickel-phosphorus plating 36 as a hardening film, but the hardening treatment is not limited to this, and the inner wall 20 or the movable scroll 1 is not limited to this.
A plate made of an iron-based material is provided on at least one of 0. (5) In the second embodiment, the front housing 2
Alternatively, only one of the movable scrolls 10 is made of an aluminum material or an aluminum alloy, and the inner wall 2 on the side made of the aluminum material or the aluminum alloy is used.
Apply the cured film 36 only to the 0 surface or the surface of the substrate 10. (6) In the second embodiment, the hardened film as the hardening treatment is embodied in the nickel-phosphorus plating 36.
The present invention is not limited to this, and may be embodied in, for example, nickel-boron plating, oxidizing the inner wall 20 surface and the substrate 11 surface, or the like. (7) In the third embodiment described above, the flange portions 39 and 40 are provided at the tip of the fixing pin 38, but by changing this,
Providing a pair of flange portions 39, 40 at the tip of the movable pin 23. In this case, since the movable pin 23 also tilts as the movable scroll 10 tilts, the ring 35 moves toward the inner wall 20.
Alternatively, the movable pin 23 is moved to the substrate side 10, but since the flange portions 39 and 40 of the movable pin 23 are projected from other portions, only the portions 39 and 40 made of an iron-based material are slidably contacted with each other, and the ring 35 is moved to the inner wall. There is no sliding contact with the substrate 20 or the substrate 10. (8) At least the outer edge of the ring may be chamfered to serve as a wear preventing means. By doing so, wear can be reduced by simple processing of the ring.

The technical ideas other than the claims that can be understood from the above-described embodiments will be described below along with their effects. (1) The scroll compressor according to claim 1, wherein the wear preventing means is configured by chamfering an edge portion of the ring.

By doing so, wear can be reduced by simple processing of the ring. (2) The scroll type compressor according to any one of claims 1 to 15, wherein the fixed pin 22 and the movable pin 23 are made of an iron-based material.

In this way, there is no risk of welding due to sliding contact with the ring 24, which is an iron-based material, and the degree of wear can be suppressed.

[0051]

As described above in detail, according to the invention of claim 1, the abrasion preventing means can reduce the abrasion due to the sliding contact with the inner wall or the ring of the substrate.

According to the second aspect of the present invention, the wear preventing means provided on the ring can reduce the wear of the inner wall or the substrate slidably contacting the ring. According to the invention of claim 3,
The edge portion of the side surface of the ring is formed into a curved surface. Therefore, even if the same edge portion slides, the inner wall or the substrate is not scratched, and the abrasion can be reduced.

According to the fourth aspect of the present invention, it is possible to reduce wear of the ring made of the iron-based material in sliding contact with the inner wall made of the aluminum material or aluminum alloy softer than the iron-based material and the movable scroll. Moreover, since the inner wall and the movable scroll are made of an aluminum material or an aluminum alloy, the weight of the compressor can be reduced.

According to the fifth aspect of the present invention, by forming at least the outer edge portion of the side surface of the ring into a curved surface, even if the ring slidably contacts the inner wall or the substrate, the inner wall or the substrate is scraped. The wear can be reduced.

According to the invention of claim 6, the abrasion resistance of the inner wall or the substrate is improved, and the abrasion due to the sliding contact of the ring can be reduced. According to the invention of claim 7, even if the inner wall surface or the substrate surface is brought into sliding contact with the ring by the hardening treatment of the inner wall surface or the substrate surface, the abrasion can be reduced.

According to the eighth aspect of the present invention, the hardened film improves the abrasion resistance of the inner wall surface or the substrate surface, and the abrasion can be reduced even if the inner wall surface or the substrate surface is brought into sliding contact with the ring. According to the invention of claim 9, when the plate made of an iron-based material provided on the inner wall surface or the substrate surface, for example, the front housing or the movable scroll is made of an aluminum material or an aluminum alloy, compression by aluminum or an aluminum alloy is performed. The advantages of both materials, that is, the weight reduction of the machine and the improvement of abrasion resistance by providing the plate made of the iron-based material, can be utilized.

According to the tenth aspect of the invention, the durability of the ring is improved and the weight of the compressor is reduced. With this effect, the inner wall surface and the substrate surface can be hardened to reduce the abrasion caused by the sliding contact of the inner wall surface and the substrate surface with the ring.

According to the eleventh aspect of the present invention, abrasion of the inner wall or the substrate can be prevented by the abrasion preventing means provided on one of the pins. According to the invention of claim 12, by the concave portion,
Since the ring is held by the guide, the ring does not slide on the inner wall or the substrate. Therefore, abrasion of the inner wall surface and the substrate can be prevented.

According to the thirteenth aspect of the present invention, the durability of the ring is improved and the weight of the compressor is reduced. The ring is not brought into sliding contact with the inner wall or the substrate while exhibiting this effect. Therefore, abrasion of the inner wall surface and the substrate can be prevented.

According to the fourteenth aspect of the present invention, the ring is guided by the regulating plate and the movement of the ring is regulated by the hole, so that the ring does not come into sliding contact with the inner wall or the substrate. Therefore, abrasion of the inner wall surface and the substrate can be prevented.

According to the fifteenth aspect of the present invention, the durability of the regulation plate and the ring is improved, and the weight of the compressor is reduced. This effect can be achieved, and at the same time, abrasion of the inner wall surface and the substrate can be prevented.

[Brief description of drawings]

FIG. 1 is a view showing a first embodiment embodying the present invention and is a vertical cross-sectional view of a scroll compressor.

FIG. 2 is an enlarged view showing a rotation prevention mechanism in FIG.

FIG. 3 is a perspective view showing a ring.

FIG. 4 is a view showing a second embodiment and is an enlarged cross-sectional view of a rotation preventing mechanism.

FIG. 5 is a view showing a third embodiment and is an enlarged cross-sectional view of a rotation prevention mechanism.

FIG. 6 is a perspective view of a rotation prevention mechanism.

FIG. 7 is a view showing a fourth embodiment and is an enlarged perspective view of a rotation preventing mechanism.

FIG. 8 is an enlarged cross-sectional view of a rotation prevention mechanism.

FIG. 9 is an enlarged cross-sectional view showing a rotation preventing mechanism in a conventional scroll compressor.

[Explanation of symbols]

1 ... Fixed scroll also serving as a center housing, 2 ... Front housing which is the front side of the housing, 4 ...
Rotation axis, 6 ... Eccentric axis, 10 ... Movable scroll, 11 ... Movable scroll substrate, 14 ... Fixed scroll substrate, 1
5 ... Vortex wall, 16 ... Vortex wall, 20 ... Inner wall, 21 ... Rotation prevention mechanism, 22 ... Fixed pin, 23 ... Movable pin, 24 ... Ring, 25 ... Ring side face, 26 ... Ring side face, 27 ... Ring side face outer edge End part, 28 ... Outer edge part of ring side surface, 29
... Inner edge end of ring side surface, 30 ... Inner edge end of ring side surface, 35 ... Ring, 36 ... Nickel as cured coating-
Phosphorous plating, 38 ... Fixing pin, 39 ... Flange portion forming concave portion, 40 ... Flange portion forming concave portion, 41 ... Recessed portion, 44 ... Regulation plate, 46 ... Regulation hole, 47 ... Ring, 48
… Concave part, 100… compression chamber.

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Tetsuhiko Fukunuma 2-chome, Toyota-cho, Kariya city, Aichi Stock company, Toyota Industries Corporation (72) Inventor Shigeki Iwanami 1-1-chome, Showa-cho, Kariya city, Aichi Japan In Denso Co., Ltd. (72) Inventor Yuichi Tsumaga 1-1 1-1 Showa-cho, Kariya city, Aichi prefecture Nihon Denso Co., Ltd.

Claims (15)

[Claims] 1. A fixed scroll is provided in the housing,
An eccentric shaft is provided at the end of a rotary shaft that is rotatably supported on the front side of the housing, and a movable scroll is supported on the eccentric shaft so as to be relatively rotatable. In a scroll-type compressor in which a compression chamber whose volume is reduced by the revolution of the orbiting movable scroll is formed by the spiral wall and the substrates of both scrolls, a plurality of fixing pins protruding from the inner wall of the housing, A movable pin that protrudes from the base plate of the movable scroll so as to correspond to the fixed pin and a ring that is loosely fitted to the fixed pin and the movable pin constitute a rotation preventing mechanism for the movable scroll. A scroll type compressor provided with a wear preventing means for preventing wear of a portion slidingly contacting the ring. 2. The scroll compressor according to claim 1, wherein the wear preventing means is provided on a ring. 3. The wear preventing means is formed by forming an edge portion of a ring side surface into a curved surface.
The scroll compressor described in. 4. The ring according to claim 3, wherein the ring is made of an iron-based material, the front housing having the inner wall and the movable scroll are made of an aluminum material or an aluminum alloy, and both edges of the ring are formed into curved surfaces. Scroll type compressor. 5. The scroll compressor according to claim 2, wherein at least an outer edge of the ring side surface is formed into a curved surface. 6. The scroll compressor according to claim 1, wherein the abrasion preventing means is provided on at least one of the inner wall surface and the substrate surface, and is configured to improve abrasion resistance of the inner wall or the substrate. 7. The scroll compressor according to claim 6, wherein the wear preventing means is a hardening treatment. 8. The scroll compressor according to claim 7, wherein the hardening treatment is to apply a hardening film. 9. The scroll compressor according to claim 7, wherein the hardening treatment is to provide a plate made of an iron-based material. 10. The scroll type according to claim 1, wherein the ring is made of an iron-based material, the front housing having an inner wall and the movable scroll are made of an aluminum material or an aluminum alloy, and the inner wall surface and the substrate surface are hardened. Compressor. 11. The scroll compressor according to claim 1, wherein the wear preventing means is provided on either one of a fixed pin and a movable pin. 12. The scroll compressor according to claim 11, wherein the wear preventing means is configured by providing a concave portion for guiding and holding a ring at a tip portion of one of a fixed pin and a movable pin. . 13. The scroll compressor according to claim 11, wherein the ring is made of an iron material, and the front housing having the inner wall and the movable scroll are made of an aluminum material or an aluminum alloy. 14. The wear preventing means includes a restriction plate between an inner wall and a base plate of the movable scroll, and an outer peripheral edge of the ring is formed by an inner edge of a restriction hole formed in the restriction plate and allowing revolution of the ring. 2. The structure according to claim 1, wherein the inner wall surface of the recess is regulated by guiding the recess formed in the surface and further moving the ring toward the inner wall side or the substrate side by contacting the inner wall surface of the recess with the inner edge of the hole. The scroll compressor described. 15. The scroll compressor according to claim 14, wherein the front housing having the inner wall and the movable scroll are made of an aluminum material or an aluminum alloy, and the restriction plate and the ring are made of an iron-based material.