JPH07332256A - Scroll type compressor - Google Patents

Abstract

PURPOSE:To provide a scroll type compressor which is constituted to facilitate the feed of lubricating oil to a gap between the base plate of a moving scroll member and a housing, smoothen slide therebetween, facilitate processing, and simplify manufacture. CONSTITUTION:A plate-form ring 22 is located between a moving scroll member 9 and a front housing 2 and a compression reaction force is exerted on the moving scroll member 9 along the axial direction of a rotary shaft 4. A fixed plate 26 is located between the ring 22 and the front housing 2. A plurality of pressure receiving protrusion parts 23 approximately in a fan-shape are peripherally formed on the two surfaces of the ring 22. The corner part and the root part of the pressure receiving protrusion parts 23 is formed in an arcuate shape and a peripheral part is chamfered. Further, a pocket is arranged at the central part of the pressure receiving protrusion part 23.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scroll compressor used in, for example, an air conditioner for vehicles.

[0002]

2. Description of the Related Art Generally, in a scroll type compressor, a fixed scroll member having a base plate and a spiral portion and a movable scroll member having a base plate and a spiral portion are meshed with each other at the spiral portions to form a scroll member. A compression chamber is formed between them. Then, the movable scroll member revolves around the axis of the fixed scroll member, whereby the compression chamber is moved from the outer peripheral side to the center side of the spiral portion, and the gas is gradually compressed.

A conventional scroll type compressor of this type is disclosed in, for example, Japanese Patent Application Laid-Open No. 62-199983. In this compressor, the rotary shaft is supported by the front housing, and the eccentric shaft is fixed to the disk portion provided at the end of the rotary shaft. The movable scroll member is supported by the eccentric shaft and revolves around it by the rotation of the rotary shaft. The movable scroll member and the fixed scroll member are housed in the rear housing.

The plate member is fixed so as to face the substrate of the movable scroll member. The substrate of the movable scroll member is in sliding contact with the plate member. During operation of the compressor, a compression reaction force acting on the substrate of the movable scroll member in the axial direction of the rotating shaft is received by the front housing via the plate member.

[0005]

However, in the above-mentioned conventional scroll compressor, the compression reaction force is received by the plate member by the entire annular region of the base plate of the movable scroll member, and the sliding area thereof increases. Therefore, it is difficult to supply the lubricating oil to the sliding portion. Therefore, the sliding resistance between the base plate and the plate member of the movable scroll member becomes large, the sliding between the two does not occur smoothly during operation of the compressor, and the power required by the compressor is also large. There was a problem that energy loss occurs.

In addition, there is a problem that it is not easy to process the surfaces of the movable scroll member, which are in sliding contact with the plate member, with flat surfaces. The present invention has been made by paying attention to the problems existing in such conventional techniques. It is an object of the present invention to provide a scroll compressor in which lubricating oil is easily supplied between the base plate of the movable scroll member and the housing, and sliding between the two can be performed smoothly.

Another object of the present invention is to provide a scroll type compressor which is easy to process and easy to manufacture.

[0008]

In order to achieve the above object, in the invention of a scroll compressor according to claim 1, a compression reaction force acting on a movable scroll member along its central axis. A plate-shaped ring for receiving is arranged between the movable scroll member and the housing, and a plurality of pressure-receiving convex portions are provided in the ring in the circumferential direction.

According to the second aspect of the invention, a plate-shaped ring that receives a compression reaction force acting on the movable scroll member along the central axis thereof is arranged between the movable scroll member and the housing, and the movable scroll member is provided. A plurality of pressure receiving convex portions are provided on the substrate of the member in the circumferential direction.

According to the third aspect of the present invention, a plurality of pressure receiving convex portions are provided on the substrate of the movable scroll member in the circumferential direction. According to a fourth aspect of the invention, in the invention according to any one of the first to third aspects, the pressure-receiving convex portion is formed into a substantially fan shape centering on a central axis of the movable scroll member.

According to the invention described in claim 5, claims 1 to 4 are provided.
In any one of the inventions described above, the root portion of the pressure receiving convex portion is formed in an arc shape so that stress is not concentrated. According to a sixth aspect of the invention, in the invention according to any one of the first to fourth aspects, the peripheral edge portion of the pressure receiving convex portion is chamfered.

According to the invention described in claim 7, claims 1 to 4 are provided.
In any one of the inventions described above, the corner portions of the four corners of the pressure receiving convex portion are formed in an arc shape. According to an eighth aspect of the invention, in the invention according to any one of the first to fourth aspects, the pressure receiving convex portion is provided with a pocket for storing a lubricating oil.

According to a ninth aspect of the invention, in the eighth aspect of the invention, the pocket is a through hole. According to a tenth aspect of the invention, in the first or second aspect of the invention, the ring is made of aluminum or an aluminum alloy.

According to the invention described in claim 11, claims 1 to
In the invention described in any one of 4 above, the movable scroll member is made of aluminum or an aluminum alloy, and a surface of the ring or the movable scroll member is hardened.

According to a twelfth aspect of the present invention, the first to third aspects are provided.
In the invention described in any one of 11 above, the housing has a plate of an iron-based material with which the pressure-receiving convex portion is in sliding contact.

[0016]

In the invention of the scroll compressor according to claim 1, since the ring is provided with a plurality of pressure receiving projections in the circumferential direction,
Lubricating oil is easily supplied to each pressure-receiving convex portion as compared with the case where the entire surface is a sliding surface, and sliding on these convex portions is performed smoothly.

In the invention described in claims 2 and 3,
The pressure receiving convex portion is provided on the substrate of the movable scroll member, and the sliding of this portion is performed smoothly. In the invention according to claim 4, since the pressure-receiving convex portion is formed in a substantially fan shape around the central axis of the movable scroll member, it is easily formed by cutting in the direction of the central axis.

According to the fifth aspect of the invention, since the root portion of the pressure-receiving convex portion is formed in an arc shape, stress concentration on this portion is relieved. In the inventions of claims 6 and 7, since the peripheral edge portion of the pressure receiving convex portion is chamfered or the corner portions at the four corners are formed in an arc shape, the peripheral edge portion of the pressure receiving convex portion is prevented from being caught due to the rotation of the movable scroll. It

According to the eighth aspect of the invention, since the pressure receiving projection is provided with a pocket for storing a lubricating oil,
Lubricating oil is supplied from the pockets to the pressure receiving projections, which are sliding parts.

According to the ninth aspect of the invention, since the pocket is formed by the through hole, the lubricating oil is always supplied from this through hole to the sliding portion. According to the invention of claim 10,
Since the ring is made of aluminum or an aluminum alloy, the weight of the compressor is reduced and the centrifugal force of the ring is suppressed.

In the invention of claim 11, the movable scroll member is made of aluminum or an aluminum alloy, and the surface of the ring or the movable scroll member is subjected to a hardening treatment. Therefore, the weight of the compressor is reduced, and the ring or the movable scroll member is prevented from being welded by the hardening process.

According to the twelfth aspect of the invention, since the housing has the plate made of an iron-based material with which the pressure-receiving convex portion is in sliding contact, the plate can maintain a predetermined strength and can reliably receive the compression reaction force.

[0023]

【Example】

(First Embodiment) A first embodiment of a scroll type compressor embodying the present invention will be described below in detail with reference to FIGS.

As shown in FIGS. 1 and 2, the fixed scroll member 1 also serves as a center housing, and a front housing 2 and a rear housing 3 are fixed to both front and rear end surfaces thereof. The rotary shaft 4 is rotatably supported in the front housing 2 by a bearing 5, and an eccentric shaft 6 is provided at the inner end of the rotary shaft 4 so as to project therefrom. The bush 7 is rotatably supported by the eccentric shaft 6. The fixed scroll member 1, the front housing 2, and the rear housing 3 are made of aluminum or aluminum alloy in order to reduce the weight of the compressor.

The movable scroll member 9 is rotatably supported by the bush 7 via a bearing 8 at a cylindrical boss portion 10 on the outer surface thereof. Then, the movable scroll member 9 is provided with an eccentric shaft 6 when the rotating shaft 4 is rotated.
Through the bush 7 and the bearing 8 by the rotating shaft 4
Revolved around the axis of. The movable scroll member 9 is made of aluminum or an aluminum alloy, is configured to suppress the centrifugal force associated with the orbital movement, and is lightweight.

The fixed scroll member 1 comprises a substrate 11 and a spiral portion 12 formed integrally on the inner surface thereof. Similarly, the movable scroll member 9 also includes a substrate 13 and a spiral portion 14 integrally formed on the inner surface thereof. The scroll members 1 and 9 are meshed with each other in the spiral portions 12 and 14, and the end faces of the spiral portions 12 and 14 in the axial direction are opposite to each other.
It faces 3 and 11. A compression chamber 15 is formed by the substrates 11 and 13 of the scroll members 1 and 9 and the spiral portions 12 and 14.

The suction chamber 16 includes the scroll members 1 and 9 described above.
It is formed between the outer peripheral portions of the spiral portions 12 and 14 and the peripheral wall 1a of the fixed scroll member 1. The suction port 17 is provided at an obliquely upper position of the front housing 2, and the refrigerant gas is sucked into the suction chamber 16 from the suction port 17.
The discharge hole 18 is formed in the center of the base plate 11 of the fixed scroll member 1, and connects the compression chamber 15 to the discharge chamber 19 in the rear housing 3. The discharge valve 20 is arranged at the outer end of the discharge hole 18, and its open position is regulated by the retainer 21.

The ring 22 is arranged between the substrate 13 of the movable scroll member 9 and the front housing 2. The ring 22 is formed of aluminum or aluminum alloy so as to suppress centrifugal force and achieve weight reduction. As shown in FIGS. 4 to 9, the plurality of pressure receiving convex portions 23 are formed on both side surfaces of the ring 22 so as to project at predetermined intervals in the circumferential direction. As shown in FIG. 7, the pressure-receiving convex portion 23 has a substantially fan shape with the center axis of the ring 22 as the center, and four corner portions 23a thereof are formed in an arc shape having a predetermined diameter.

As shown in FIG. 8, the peripheral edge portion 23b of the pressure receiving convex portion 23 is chamfered. Here, the chamfer includes both the case of cutting the peripheral edge portion 23b in an arc shape and the case of cutting in a straight line obliquely. The root portion 23c of the pressure receiving convex portion 23 is formed in an arc shape so that stress is not concentrated. The pocket 24 as a hole for storing the lubricating oil is provided almost at the center of the pressure-receiving convex portion 22 so that the lubricating oil in the pocket 24 can receive the pressure-receiving convex portion 2.
3 is supplied to the sliding contact surface.

As shown in FIGS. 2, 4 and 6, except for the portion facing the suction port 17, the medium-thickness portions 38 and the thin-walled portions 39 are formed every other space between the respective pressure-receiving convex portions 23, The root portion 23c of the inner wall portion 38 is formed in an arc shape to prevent stress concentration. The suction passage 25 is formed by a thin portion 39 at a position corresponding to the suction port 17. A part of the gas sucked from the suction port 17 through the passage 25 passes in the direction of the bearing 8,
The part of the bearing 8 is lubricated by the lubricating oil in the gas.

As shown in FIGS. 1 and 2, the ring-shaped fixing plate 26 is arranged on the inner wall surface of the front housing 2. The two detent pins 27 project from the front housing 2 and have holes 28 formed in the fixed plate 26.
Is fixed to the fixing plate 26 to prevent the fixed plate 26 from rotating.

Of the compression reaction force due to the gas compression in the compression chamber 15, the compression reaction force acting on the movable scroll member 9 along the axial direction of the movable scroll member 9 is transmitted to the ring 22. The ring 22 receives this compression reaction force at the pressure receiving convex portion 23. Further, the compression reaction force is received by the plate 26 via the pressure receiving convex portion 23.

The plate 26 is made of an iron material. The surface of the movable scroll member 9 in contact with the ring 22 is hardened by nickel-phosphorus plating or the like. As shown in FIGS. 1 to 3, a plurality of columnar rotation preventing elements 29 are fixed through holes 30 provided in the inner wall portion 38 of the ring 22. One end of each of these elements 29 is inserted into a revolution position regulating hole 31 as a pocket provided in the base plate 13 of the movable scroll member 9, and the other end thereof is a revolution position regulating hole as a pocket formed in the fixed plate 26 and the front housing 2. It is inserted in 33,32. Then, the element 29 moves while being sandwiched between the peripheral walls of the restriction holes 31 and 32, so that the movable scroll member 9 is prevented from rotating and revolving is permitted.
This element 29 is made of an iron-based material. Element 2
Both end surfaces of 9 are not in contact with the bottom surfaces of both restriction holes 31 and 32. The inner surface of the movable scroll member 9 on the side of the regulation hole 31 is hardened by nickel-phosphorus plating or the like.

The ring 22 is manufactured as follows. First, a cylinder made of aluminum or aluminum alloy is sliced into a predetermined thickness. Next, by moving a cutter such as a milling cutter in the radial direction of this ring-shaped ring, the convex portion 23, the intermediate wall portion 38, and the thin wall portion 39 are cut out. In this case, the convex portion 23 naturally has a fan shape.
Then, the corner portion 23a of the convex portion 23 is cut into an arc shape, and the peripheral edge portion 23b is chamfered and cut.

As described above, the ring 22 is manufactured only by a simple cutting process, and the manufacturing thereof is easy. The hole 29
The pocket 24 and the pocket 24 are formed by punching. The perforating process may be performed at any time after the round cutting.

Next, the operation of the scroll type compressor of this embodiment constructed as described above will be described. Now,
As shown in FIGS. 1, 2 and 4, when the rotary shaft 4 of the compressor is rotated, the movable scroll member 9 is prevented from rotating due to the eccentric rotation of the eccentric shaft 6, while rotating around the shaft center of the rotary shaft 4. Is revolved around. By this operation, the refrigerant gas is sucked into the suction chamber 16
Therefore, it is taken into the compression chamber 15 between the scroll members 1 and 9. Then, as shown in FIGS. 1 and 10, as the movable scroll member 9 revolves, the compression chamber 15 becomes
2, 2 and 14 are moved from the outer peripheral side to the central side, and the volume is gradually reduced to perform the compression action. Therefore, the refrigerant gas is compressed in the compression chamber 1
5 is gradually compressed and is discharged from the discharge hole 18 to the discharge valve 2
0 is pushed open and discharged into the discharge chamber 19.

A compression reaction force along the axial direction acts on the movable scroll member 9, and the compression reaction force is applied to the ring 22.
It is received by the plate 26 via the convex portion 23. As the movable scroll member 9 revolves, the ring 22 also revolves. Therefore, the movable scroll member 9 smoothly revolves without being restricted by its revolution. At this time, since the ring 22 is made of aluminum or aluminum alloy and is lightweight, the centrifugal force acting on itself is small. Therefore, the ring 22 revolves smoothly and suppresses vibration of the compressor. Moreover, in the ring 22, since the meat of the portion other than the convex portion 23 is stolen in the medium-thickness portion 38 and the thin-walled portion 39, the weight is further reduced, which contributes to the smooth operation of the compressor.

The convex portion 23 of the ring 22 is generated by the compression reaction force.
Slides on the substrate 13 and the plate 26 of the movable scroll member 9. At this time, since the surface of the substrate 13 is hardened and the plate 26 is an iron-based material, the ring 22 does not fuse to the substrate 13 or the plate 26.

In addition, since the pressure-receiving convex portion 23 has a fan shape, it can have a larger area than a circular shape, and can receive a compression reaction force over a wide area, which results in abrasion resistance. In addition to being excellent, it is possible to obtain a smooth compression operation. As a result, the power required by the compressor can be reduced and the performance of the compressor can be improved.

In addition, the corner portion 23a of the pressure receiving convex portion 23 is formed in an arc shape, and the peripheral edge portion 23b is chamfered. Therefore, even if an unbalanced load acts on the ring 22,
The peripheral edge portion 23b of the convex portion 23 and the corner portion 23a are prevented from being caught or damaged, and the smooth revolution of the ring 22 is maintained.

Further, a pocket 24 is provided in the central portion of the pressure-receiving convex portion 23, and the pocket 24 is open at the sliding contact portion between the pressure-receiving convex portion 23 and the substrate 13 and the plate 26. Lubricating oil in the refrigerant gas is accumulated in the refrigerant gas, and the sliding contact portion is lubricated by the lubricating oil. Moreover, the lubricating oil in the gas around the ring 22 is smoothly supplied as it is caught in the sliding contact portion via the chamfered portion at the peripheral edge of the pressure-receiving convex portion 23. Therefore, the sliding contact portion is prevented from running out of lubricating oil, and the abrasion of the sliding contact portion is reduced. Therefore, it is possible to prevent seizure of the sliding contact portion and improve the reliability of the compressor.

In addition, the convex portion 23 and the root portion 23c of the inner wall portion 38 are formed in an arc shape so that stress concentration does not occur. Therefore, the root portion 23c is prevented from being cracked and has excellent durability.

On the other hand, the element 29 has the revolution position regulating holes 31, 3
It slides on the inner peripheral surface of 2. In this case, the element 29 is an iron-based material, the inner peripheral surface of the hole 31 is hardened, and the hole 32 is
A plate 26 made of an iron-based material faces the inner peripheral surface of the. Therefore, the deformation, wear, and fusion of the element 29 and the holes 31, 32 are prevented. Moreover, since the element 29 is fixed to the hole 24 in the medium-thickness portion, a sufficient fixing margin can be secured, strong assembly can be performed, and the element 29 does not tilt.

In addition, the suction port 17 is formed with a thin portion 39 formed over a wide area on the ring 22 to form the suction passage 25. Therefore, the lubricating oil in the gas is sufficiently supplied to the portion of the bearing 8, and the smooth revolution of the movable scroll member 9 can be obtained. Of course, a gap is also formed between the medium-thickness portion 38 and the thin-walled portion 39 of the ring 22 and the substrate 13 and the plate 26, so that the lubricating oil passes through the gap and the bearing 8 or other sliding contact is made. Part is surely lubricated. (Second Embodiment) Next, a second embodiment of the present invention will be described with reference to FIG.

Now, in this embodiment, the pressure receiving convex portion 34 similar to that of the first embodiment is provided on the surface of the movable scroll member 9 facing the ring 22 of the substrate 13. The pressure receiving projections 23 are not provided on both surfaces of the ring 22. Inhalation port 17
The suction passage 25 corresponding to is provided in the substrate 13 over a wide range. The pocket 24 of the pressure receiving convex portion 34 has a bottomed shape. Then, the compression reaction force at the time of compression is transmitted to the ring 22 via the pressure receiving convex portion 34 provided on the substrate 13 of the movable scroll member 9. Other configurations including that the four corner portions 23a of the convex portion 34 have an arc shape and the root portion 23c has an arc shape are the same as those of the first embodiment.

Therefore, in this embodiment, the shape of the ring 22 is simplified and its manufacture is facilitated. Other functions are similar to those of the first embodiment. (Third Embodiment) Next, a third embodiment of the present invention will be described with reference to FIGS.

Now, as shown in FIGS. 12 to 14, in this embodiment, the movable scroll member 9 is provided with the convex portion 34 and the ring 22 is omitted. Therefore, the pressure receiving convex portion 3 provided on the substrate 13 of the movable scroll member 9
4 is in sliding contact with the fixed plate 26.

A rotation preventing mechanism for the movable scroll member 9 is provided between the movable scroll member 9 and the front housing 2. That is, the plurality of rotation preventing pins 35 and 36 are fixed to the inner wall portion of the front housing 2 and the inner wall portion 38 of the base plate 13 of the movable scroll member 9, respectively, and their tips are close to each other at a predetermined interval.

As shown in FIGS. 15 and 16, the rotation preventing ring 37 is fitted into these adjacent rotation preventing pins 35 and 36 to allow the orbiting of the movable scroll member 9 and regulate the rotation. In addition, as shown in FIG.
The rotation stop pin 27 is supported by the hole of the front housing 2 and is fitted into the hole 28 of the fixed plate 26. The hole 33 is formed larger than the rotation preventing ring 37,
The rotation prevention ring 37 is allowed to move. The rotation prevention ring 37 is made of iron.

In the third embodiment, the small rotation preventing ring 37 is required, but the ring 22 is omitted, so that the weight of the compressor can be reduced. Other configurations and operations are similar to those of the second embodiment.

The present invention is not limited to the configuration of the above-mentioned embodiment, and can be embodied by arbitrarily changing the configuration as follows, for example. (A) In the first embodiment, the pressure receiving convex portion 23 is attached to the ring 22.
Be provided on either side. (B) In the second embodiment, the pressure receiving convex portion 23 is provided on the surface of the fixed plate 26 on the movable scroll member 9 side. (C) The substrate 13 of the movable scroll member 9 in the third embodiment.
The pressure receiving convex portion 34 provided on the fixed plate 26 is provided. (D) In the third embodiment, the fixed plate 26 is fixed to the substrate 13 of the movable scroll member 9, and the fixed plate 26
The pressure receiving convex portion 34 should be provided on the front housing 2 side or the front housing 2. (E) In the first and second embodiments, the ring 22 is subjected to a hardening treatment such as nickel-phosphorus plating. (F) As the fixing plate 26, another material having excellent durability against sliding, such as titanium, is used instead of the iron-based material. (G) Producing the ring 22 by die casting (casting method). (H) The fixing plate 26 is fixed to the front housing 2 by means other than a pin, for example, by fitting a projection integrally formed on the fixing plate 26 and a recess formed in the front housing 2. (I) In the second embodiment, the fixing plate 26 is omitted and the pressure-receiving convex portion is provided on the front housing 2. (J) The ring 22 is made of a material other than aluminum or aluminum alloy, for example, titanium. (K) The pocket 24 of the ring 22 should be a bottomed hole instead of a through hole. In this case, the pocket 24 and the ring 22
Form on both sides of. (L) A plurality of pockets 2 for one pressure receiving convex portion 23
Provide 4. (M) Chamfering the opening edge of the pocket 24.

The technical ideas other than the claims understood from the above embodiments will be described below along with their effects. (1) The scroll compressor according to claim 5, wherein the pocket is provided substantially at the center of the pressure receiving convex portion of the ring. With this configuration, the lubricating oil can be reliably supplied to the entire sliding portion of the pressure receiving convex portion. (2) The scroll compressor according to any one of claims 1 to 3, wherein the pressure-receiving convex portion is formed of a different metal from the portion in contact with it. According to this structure, it is possible to prevent fusion of the pressure receiving convex portion. (3) Manufacture of a ring in a scroll compressor in which a cylinder is cut into a ring with a predetermined thickness to form a ring, and at least one side surface of the ring is cut along the radial direction of the ring to form a fan-shaped pressure receiving convex portion. Method. By this method,
The ring can be easily manufactured by easy processing.

[0053]

As described in detail above, according to the invention of the scroll compressor described in claim 1, as compared with the conventional case where the entire surface of the movable scroll member and the plate member is the sliding surface, Lubricating oil can be easily supplied to the pressure-receiving convex portions, and sliding on these convex portions can be smoothly performed.

According to the invention described in claims 2 and 3, the substrate of the movable scroll member is provided with the pressure receiving convex portion,
The sliding of this portion can be performed smoothly. According to the invention of claim 4, since the pressure-receiving convex portion is formed in a substantially fan shape around the central axis of the movable scroll member, the convex portion can be easily formed by cutting in the direction of the central axis. can do.

According to the fifth aspect of the present invention, since the root portion of the pressure-receiving convex portion is formed in an arc shape, stress concentration on this portion can be relieved. According to the invention described in claims 6 and 7, since the peripheral edge portion of the pressure receiving convex portion is chamfered or the corner portions of the four corners are formed in an arc shape, the peripheral edge portion of the pressure receiving convex portion due to the rotation of the movable scroll member. It is possible to prevent snagging.

According to the eighth aspect of the present invention, since the pressure receiving convex portion is provided with the lubricating oil reservoir pocket, the lubricating oil can be smoothly supplied from the pocket to the pressure receiving convex portion which is a sliding portion. it can.

According to the invention of claim 9, since the pocket is formed by the through hole, the lubricating oil accumulated in the through hole can be constantly supplied to the sliding portion. Claim 1
According to the invention described in 0, since the ring is made of aluminum or an aluminum alloy, the weight of the compressor can be reduced and the centrifugal force of the ring can be suppressed.

According to the eleventh aspect of the present invention, it is possible to reduce the weight of the compressor and prevent the ring or the movable scroll member from being welded by the hardening treatment.

According to the twelfth aspect of the present invention, since the housing has the plate made of an iron-based material with which the pressure-receiving convex portion is in sliding contact,
The plate can maintain a predetermined strength and can reliably receive the compression reaction force.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view showing a first embodiment of a scroll compressor embodying the present invention.

FIG. 2 is an exploded perspective view of a scroll compressor.

3 is a cross-sectional view taken along the line III-III in FIG. 1 at a ring position.

FIG. 4 is a side view showing a state in which the ring is assembled to the front housing.

FIG. 5 is a front view showing a ring.

FIG. 6 is a side view showing a ring.

FIG. 7 is a partial enlarged view showing a pressure receiving convex portion of the ring.

FIG. 8 is a cross-sectional view showing a pressure receiving convex portion of a ring.

FIG. 9 is a sectional view showing a suction passage of a ring.

FIG. 10 is a cross-sectional view showing the relationship between the spiral portion of the movable scroll member and the spiral portion of the fixed scroll member.

FIG. 11 is an exploded perspective view of a scroll type compressor showing a second embodiment of the present invention.

FIG. 12 is a vertical sectional view showing a scroll type compressor according to a third embodiment of the present invention.

FIG. 13 is an exploded perspective view of the scroll type compressor.

FIG. 14 is a partial cross-sectional view showing a rotation stopping mechanism of a fixed plate.

FIG. 15 is a sectional view showing a rotation preventing mechanism.

FIG. 16 is a sectional view showing a rotation prevention mechanism of the same.

[Explanation of symbols]

1 ... Fixed scroll member, 2 ... Front housing, 3
... rear housing, 9 ... movable scroll member, 11 ... substrate, 12 ... spiral part, 13 ... substrate, 14 ... spiral part, 15 ...
Compression chamber, 22 ... Ring, 23 ... Pressure receiving convex portion, 23a ... Corner portion, 23b ... Peripheral portion, 23c ... Root portion, 24 ... Pocket, 26 ... Fixing plate.

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

Claims (12)

[Claims] 1. A fixed scroll member having a substrate and a scroll portion and a movable scroll member having a substrate and a scroll portion are meshed with each other in the scroll portion in a housing to form a compression chamber between the scroll members. Then, by revolving the orbiting movable scroll member around the axis of the fixed scroll member, the scroll type compressor is configured to move the compression chamber from the outer peripheral side to the center side of the spiral portion to perform the gas compression action, A scroll in which a plate-shaped ring that receives a compression reaction force acting on the movable scroll member along the central axis thereof is arranged between the movable scroll member and the housing, and a plurality of pressure receiving projections are provided in the ring in the circumferential direction. Type compressor. 2. A fixed scroll member having a substrate and a scroll portion and a movable scroll member having a substrate and a scroll portion are meshed with each other in the scroll portion in a housing to form a compression chamber between the scroll members. Then, by revolving the orbiting movable scroll member around the axis of the fixed scroll member, the scroll type compressor is configured to move the compression chamber from the outer peripheral side to the center side of the spiral portion to perform the gas compression action, A plate-shaped ring that receives a compression reaction force acting on the movable scroll member along the central axis thereof is arranged between the movable scroll member and the housing, and a plurality of pressure receiving convex portions are circumferentially arranged on the substrate of the movable scroll member. The scroll compressor provided. 3. A fixed scroll member having a base plate and a scroll portion and a movable scroll member having a base plate and a scroll portion are meshed with each other in the scroll portion in a housing to form a compression chamber between the scroll members. Then, by revolving the orbiting movable scroll member around the axis of the fixed scroll member, the scroll type compressor is configured to move the compression chamber from the outer peripheral side to the center side of the spiral portion to perform the gas compression action, A scroll-type compressor in which a plurality of pressure-receiving convex portions are provided on the substrate of the movable scroll member in the circumferential direction. 4. The scroll compressor according to claim 1, wherein the pressure receiving convex portion is formed into a substantially fan shape centering on a central axis of the movable scroll member. 5. The scroll compressor according to claim 1, wherein a root portion of the pressure receiving convex portion is formed in an arc shape so that stress is not concentrated. 6. The scroll compressor according to claim 1, wherein a peripheral portion of the pressure receiving convex portion is chamfered. 7. The scroll compressor according to claim 1, wherein corner portions at four corners of the pressure receiving convex portion are formed in an arc shape. 8. The scroll compressor according to claim 1, wherein a pocket for storing a lubricating oil is provided on the pressure receiving convex portion. 9. The scroll compressor according to claim 8, wherein the pocket is a through hole. 10. The scroll compressor according to claim 1, wherein the ring is made of aluminum or an aluminum alloy. 11. The scroll compressor according to claim 1, wherein the movable scroll member is made of aluminum or an aluminum alloy, and a surface of the ring or the movable scroll member is hardened. . 12. The scroll compressor according to claim 1, wherein the housing has a plate made of an iron-based material with which the pressure-receiving convex portion is in sliding contact.