JPH08326667A - Scroll type fluid machine - Google Patents

Abstract

PURPOSE: To provide a scroll type fluid machine which can be easily assembled by reducing the number of parts regardless of its provision of an axial movement regulation mechanism. CONSTITUTION: A housing 310 provided with a fluid entrance 410 and a fluid exit 420 is mounted. A drive shaft 314 is axially arranged inside of the housing, actively connected to a turning scroll 340 so as to drive the turning motion of the turning scroll. An inside block 320 is so fixed and arranged inside of the housing so as to support a part of the drive shaft. An axial movement regulation mechanism is arranged between the inside block and the housing so as to regulate axial movement of the drive mechanism. This axial movement regulation mechanism is provided with an annular flange 314c extending radially from the drive shaft, a thrust slide bearing 328 for the purpose of making slidable contact with the first end surface of the annular flange, and a thrust slide bearing 326 for the purpose of making slidable contact with the second end surface of the annular flange are provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scroll type fluid device for causing fluid movement, and more particularly to a mechanism for adjusting the axial movement of its drive shaft.

[0002]

2. Description of the Related Art Various types of fluid devices are known as this type of fluid device. Each type of fluid device includes a plurality of components that are adjacent to each other in the axial direction of the drive shaft. In order to prevent excessive wear between these parts during operation, it is desirable to provide a clearance or play between adjacent parts in the assembly of the fluid system.

FIG. 9 shows a scroll-type refrigerant compressor as an unknown scroll-type fluid device that has been tried by the applicant of the present invention in view of the above. In FIG. 9, for convenience of explanation, the left side of the drawing is referred to as the front end portion or front portion of the compressor, and the right side of the drawing is referred to as the rear end portion or rear portion of the compressor.

Referring to FIG. 9, the compressor 300
Includes a compressor housing 310 having a front end plate 311 and a cup-shaped casing 312, and the cup-shaped casing 312 is fixed to the rear end surface of the front end plate 311 by a plurality of bolts 313. An opening 311a is formed in the center of the front end plate 311, and the drive shaft 31 made of steel is used.
4 penetrates this opening 311a. The open end of the cup-shaped casing 312 has a front end plate 31.
1 and the engaging surface between the front end plate 311 and the cup-shaped casing 312 is the first O-ring 31.
It is sealed by 5. First annular sleeve 311b
Project forward from around the opening 311a, and the drive shaft 314
Surrounds the front end of the shaft and forms a shaft seal space 311c therein. A shaft seal mechanism 414 is arranged inside the shaft seal space 311c and is mounted around the drive shaft 314. The shaft seal mechanism 414 is used for the compressor housing 3
The inside of 10 is sealed to prevent the refrigerant and the lubricating oil from leaking through the opening 311a.

The drive shaft 314 is rotatably supported by a first annular sleeve 311b via a radial bearing 316. The radial bearing 316 is arranged in the front end portion of the first annular sleeve 311b. The second annular sleeve 311d projects rearward from the periphery of the opening 311a so as to surround the inner end of the drive shaft 314.

The inner block 320 has an annular front projection 3
21 and the annular rear protrusion 322, the housing 31
It is located inside 0. The inside of the housing 310 is formed by the inner wall of the cup-shaped casing 312 and the rear end surface of the front end plate 311. The annular front protrusion 321 is fixed to the front end plate 311 by a plurality of bolts 317 and surrounds the second annular sleeve 311d of the front end plate 311. The inner block 320 is provided with a conduit 150, and the conduit 150 extends in the radial direction from the lower end surface to the inner end surface of the inner block 320, and the second discharge side space 380.
And the hollow space 381 are connected to each other. The capillary tube 500 fulfills the pressure reducing function, and the second discharge side space 380
And a pressure difference of the lubricating oil between the hollow space 381 and the hollow space 381.
The capillary tube 500 is fixed inside the conduit 150.

The drive shaft 314 is provided with a cylindrical rotor 314a, which is formed integrally with the inner end surface of the drive shaft 314 and projects coaxially therefrom. The diameter of the cylindrical rotor 314a is larger than the diameter of the drive shaft 314. The cylindrical rotor 314a has a radial sliding bearing 32.
5 is rotatably supported by the inner block 320. The radial plain bearing 325 is fixedly arranged inside an opening 323 formed in the center of the inner block 320. The radial plain bearing 325 is, for example,
It is fixedly placed inside the opening 323 by forced insertion. The pin member 314b is integrally formed with the rear end surface of the cylindrical rotor 314a and protrudes therefrom. Pin member 3
The axis of 14b is radially offset from the axis of the cylindrical rotor 314a and the axis of the drive shaft 314.

The electromagnetic clutch 318 disposed around the first annular sleeve 311b includes a ball bearing 318.
a pulley 318a that is rotatably supported on the sleeve 311b via a shaft b; an electromagnetic coil 318c that is disposed inside the annular space of the pulley 318a; and an armature plate 318d that is fixed to the outer end of the drive shaft 314. ing. The drive shaft 314 is connected to an external power source via an electromagnetic clutch 318 and driven by this external power source.

Inside the housing 310, a fixed scroll 330, an orbiting scroll 340, and an anti-rotation mechanism such as an Oldham coupling mechanism 350 are housed. The rotation prevention mechanism prevents rotation of the orbiting scroll 340 during operation of the compressor.

The fixed scroll 330 includes a circular end plate 331, a first spiral member 332 extending from the front surface of the circular end plate 331, and a circular end plate 331.
And an outer peripheral wall 333 protruding forward from the outer periphery of the. The orbiting scroll 340 is located in the suction side space 370 and includes a circular end surface plate 341 and a second spiral member 342 extending from the rear side of the circular end surface plate 341. The second spiral member 342 of the orbiting scroll 340 and the first spiral member 3 of the fixed scroll 330.
32 are mutually fitted with an angular offset of 180 ° and a predetermined radial offset to form a plurality of linear contact portions. Therefore, at least a pair of sealed fluid pockets 39 are provided between the spiral members 332 and 342.
0 is formed.

The orbiting scroll 340 further includes an annular boss 343, and the annular boss 343 projects from the front end face of the circular end face plate 341. Bush 344
It is rotatably arranged inside the boss 343 via a radial plain bearing 345. Radial plain bearing 345
Are fixedly arranged inside the boss 343 by, for example, forced insertion. A hole 344a is formed through the bush 344 in the axial direction. The axis of the hole 344a is radially displaced from the axis of the bush 344. Pin member 314
b is rotatably arranged inside the hole 344 a of the bush 344. The pin member 314b protrudes from the rear end surface of the bush 344, and the retaining ring 346 causes the pin member 314b.
It is fixed to the end of b to prevent the bush 344 from moving in the axial direction.

The drive shaft 314, the pin member 314b, and the bush 344 constitute a drive mechanism for the orbiting scroll 340. A counterweight 347 is connected to the tip of the bush 344.

A fluid passage 371 is formed axially through the pin member 314b and the cylindrical rotor 314a. One end of the fluid passage 371 opens into an axial gap 372 formed between the rear end face of the bush 344 and the front end face of the circular end face plate 341 of the orbiting scroll 340.
The other end of the fluid passage 371 has a second annular sleeve 311d.
To the radial gap 381 formed by the inner surface of the drive shaft 314 and the outer surface of the drive shaft 314.

The Oldham coupling mechanism 350 functions as a rotation preventing device for the orbiting scroll 340, and is arranged between the circular end face plate 341 of the orbiting scroll 340 and the annular rear protrusion 322 of the inner block 320.

A discharge port 335 is formed at a position near the center of the spiral member 332 and penetrates the circular end plate 331 of the fixed scroll 330. Reed valve member 33
6 cooperates with the outlet 335 to control the opening and closing of the outlet 335 according to the pressure difference between the first outlet side space 360 and the central fluid pocket 390a. The retainer 337 prevents the reed valve member 336 from being excessively bent when the discharge port 335 is opened. One ends of the reed valve member 336 and the retainer 337 are connected to the circular end plate 33 of the fixed scroll 330.
It is fixed to the No. 1 by a bolt 338. The outer peripheral wall 333 of the fixed scroll 330 is fixed to the annular rear protrusion 322 of the inner block 320 by a plurality of screws 319.

In operation, as the orbiting scroll 340 orbits, the linear contact between the spiral members 332 and 342 causes the fluid pocket 390 to move about, resulting in a fluid (eg, a refrigerant) within the fluid pocket 390. ) Reduce the volume and compress. Refrigerant gas is introduced from a component such as an evaporator (not shown) of a refrigerant circuit (not shown) via fluid inlet 410 and is drawn into fluid pocket 390 from the outer end of the spiral member.

Next, the refrigerant gas taken into the fluid pocket 390 is compressed and discharged from the central fluid pocket 390a formed by the spiral members 332 and 342 into the first discharge side space 360 via the discharge port 335. . afterwards,
The refrigerant gas in the first discharge-side space 360 has a fluid passage 395.
Through the second discharge side space 380. The refrigerant gas that has flowed into the second discharge side space 380 is further discharged from the outlet 4
Through 20, it flows into another component such as a condenser (not shown) of a refrigerant circuit (not shown).

When assembling the compressor, the bush 344 of the orbiting scroll 340 and the circular end plate 34 are used.
A clearance or play must be provided between axially adjacent parts such as 1 to prevent excessive wear between them. In comparison with a conventional bearing device such as a radial ball bearing, a slide bearing cannot prevent the drive shaft 314 from moving in the axial direction. As a result, the compressor 3
During operation 00, drive shaft 314 may slide along radial slide bearings 325 and 345 and radial bearing 316 due to the clearance or play. Therefore, during operation of the compressor 300, as the drive shaft 314 moves rearward, collisions may occur between adjacent components that have some clearance or play. This collision can cause annoying noise and abnormal wear on the adjacent components that collide.

The compressor shown in FIG. 9 has a mechanism for adjusting the axial movement of the drive shaft 314. This adjusting mechanism includes an annular flange 31 formed integrally with the drive shaft 314.
4c, an annular support plate 400, a first thrust slide bearing 326, and a second thrust bearing 328. The annular flange 314c is located at the boundary between the inner end of the drive shaft 314 and the cylindrical rotor 314a. The support plate 400 has a central opening portion 400a formed in the center thereof, a plurality of holes 400b formed around the central opening portion 400a, and an annular cutout portion 400c formed in an inner peripheral region thereof. It is provided. The support plate 400 includes the annular flange 314c and the inner block 32.
It is fixed to the inner block 320 by a plurality of bolts 401 so as to be sandwiched between 0 and the support plate 400.

The first thrust plain bearing 326 is supported by the support plate 400 by at least one pin 327.
It is fixedly arranged inside the annular cutout portion 400a. The rear end surface of the first thrust slide bearing 326 slightly projects from the rear end surface of the support plate 400. The rear end surface of the first thrust slide bearing 326 faces the front end surface of the annular flange 314c. Due to the axial movement of the drive shaft 314, the first thrust slide bearing 326 makes frictional contact with the annular flange 314c, or the annular flange 3
It receives forward thrust through 14c.

The second thrust slide bearing 328 is substantially equivalent to the first thrust slide bearing 326 and has a shallow annular recess formed in the front end face of the inner block 320 along the periphery of the opening 323. At least one inside
It is fixedly arranged by two pins 329. The second thrust slide bearing 328 is the radial thrust bearing 325.
Surrounds the front end portion of the above and faces the rear end surface of the annular flange 314c. The front end face of the second thrust slide bearing 328 slightly projects from the front end portion of the inner block 320. The front end surface of the pin 329 is behind the front upper end surface of the second thrust slide bearing 328. By the axial movement of the drive shaft 314, the second thrust slide bearing 328 makes frictional contact with the annular flange 314c, or the annular flange 3
It receives rear thrust through 14c.

[0022]

Although the adjusting mechanism shown in FIG. 9 reduces the axial movement of the drive shaft 314, providing the adjusting mechanism requires a large number of parts and complicates the structure.

Therefore, the object of the present invention is to reduce the number of parts despite the provision of the axial movement adjusting mechanism.
An object is to provide a scroll type fluid device that can be easily assembled.

[0024]

According to the present invention, scroll type fluid devices listed below can be obtained.

1. A housing having a fluid inlet and a fluid outlet; a fixed scroll disposed inside the housing, having a first end plate, a first spiral member extending from the first end plate; An orbiting scroll having a second end plate disposed therein, a second spiral member extending from the second end plate, the first and second spiral members having an angular offset and An orbiting scroll that fits together with a radial offset to form a plurality of linear contact portions that define at least a pair of sealed fluid pockets; and a drive shaft axially disposed within the housing, the orbiting scroll comprising: A drive mechanism operatively connected to the scroll to effect the orbiting movement of the orbiting scroll; and the housing to support a portion of the drive shaft. Inner block fixedly arranged in a portion, an anti-rotation mechanism connected to the orbiting scroll and preventing rotation of the orbiting scroll during its orbiting motion, and the inner block for adjusting the axial movement of the drive mechanism. And an axial movement adjustment mechanism arranged between the housing and the housing, the axial movement adjustment mechanism being formed in the inner block and an annular flange extending radially from an outer surface of the drive shaft. And a first annular support portion having a first sliding means for slidably contacting the first end surface of the annular flange of the drive shaft, and extending integrally from the housing. And a second annular support portion having a second sliding means for slidably contacting the second end surface of the annular flange of the drive shaft. Location.

2. The second annular support portion further includes a first annular portion extending rearward from the housing, and a second annular portion extending from the first annular portion and having a diameter smaller than that of the first annular portion. The scroll fluid device according to claim 1, further comprising a portion and a shoulder portion that connects the first annular portion to the second annular portion.

3. The second annular portion is further a rear end surface, an annular notch portion provided in the inner peripheral portion of the rear end surface, and the sliding means arranged in the annular notch portion,
3. The scroll type fluid device according to claim 2, further comprising a plurality of holes extending from the cutout portion and accommodating a pin member for fixing the sliding means to the second annular support portion.

4. The second annular support portion further extends along the rear surface of the second annular support portion from its inner surface to the outer peripheral surface in the radial direction, and extends through the second annular cutout portion. 3. The scroll type fluid device according to item 2, which has a plurality of existing grooves.

5. Item 3. The scroll type fluid device according to Item 2, wherein the second annular support portion further includes at least one conduit that extends radially through the second annular support portion.

6. The second annular support portion further includes a rear end surface, an annular cutout portion provided in an inner peripheral portion of the rear end surface, the sliding means arranged in the annular cutout portion, and the cutout portion. 3. A scroll type fluid device according to claim 2, further comprising a plurality of holes extending from a portion and accommodating a pin member for fixing the sliding means to the second annular support portion.

7. 7. The scroll type fluid device according to item 6, wherein the cutout portion is substantially concentric with the second annular support portion.

8. The second annular support portion is further
2. The scroll type fluid device according to claim 1, which has a rear end surface, a plurality of grooves extending radially from the inner surface to the outer peripheral surface along the second annular cutout portion and the rear end surface.

9. 2. The scroll type fluid device according to claim 1, wherein the second annular support portion further has at least one conduit that extends radially through the second annular support portion.

10. The first and second sliding means,
2. The scroll type fluid device according to item 1, which is a plain bearing.

11. The first plain bearing comprises a steel first annular member and a Teflon-impregnated phosphor bronze second annular member, the second annular member, the end surface of the second annular member Item 11. The scroll type fluid device according to Item 10, which is arranged on an end surface of the first annular member so as to face the annular flange of the drive shaft.

12. 2. The scroll type fluid device according to item 1, wherein the first and second sliding means are elastic members.

13. The housing further comprises a first cup-shaped casing and a second casing attached to an open end surface of the first casing, the second casing extending integrally from the second casing. 2. The scroll type fluid device according to item 1, which has the second annular support portion.

14. Further comprising an oil flow path at least partially configured by the drive shaft and the inner block,
2. The scroll type fluid device according to item 1, wherein the axial movement adjusting mechanism is arranged inside the oil flow path.

[0039]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 shows a scroll type refrigerant compressor as a scroll type fluid device according to a first embodiment of the present invention.

In FIG. 1, components similar to those in FIG. 9 are designated by the same reference numerals, and detailed description of these components will not be repeated.

In FIG. 1, for convenience of explanation, the left side of the figure is called the front end or front of the compressor, and the right side of the figure is called the rear end or rear of the compressor.

This compressor has an adjusting mechanism for adjusting the axial movement of the drive shaft 314. This adjusting mechanism includes an annular flange 314c integrally formed on the drive shaft 314, a second annular sleeve 212, a first thrust slide bearing 326, and a second thrust slide bearing 3
And 28. The second annular sleeve 212 projects rearward from the periphery of the opening 311a so as to surround the inner end of the drive shaft 314. The inner block 320 has a plurality of bolts 317 at its annular front protrusion 321.
Is fixed to the front end side plate 311. The annular front protrusion 321 of the inner block 320 surrounds the second annular sleeve 212 of the front end side plate 311.

Referring to FIGS. 3 (a) and 3 (b) in combination with FIG. 1, the second annular sleeve 212 has a first annular portion 212a extending rearward from the rear end surface 311e of the front end side plate 311. , A second annular portion 212b extending from the first annular portion 212a, and a shoulder portion 212c connecting the first annular portion 212a to the second annular portion 212b. The diameter of the first annular portion 212a is equal to that of the second annular portion 212a.
larger than the diameter of b. The second annular sleeve 212 is
Further, it has a rear end face 212d, an annular cutout portion 213 formed in an inner peripheral region of the rear end face 212d, and at least one hole 214 (only one is shown) extending from the annular cutout portion 213. There is. The annular cutout portion 213 is preferably substantially concentric with the second annular portion 212b and the opening 311a.

In FIG. 2, the first thrust slide bearing 326 is fixedly arranged inside the annular notch 213 by the pin 327 forcibly inserted into the hole 214. The rear end surface of the first thrust slide bearing 326 slightly projects from the rear end surface of the second annular sleeve 212. The rear end surface of the first thrust slide bearing 326 faces the front end surface of the annular flange 314c. Drive shaft 31
By the axial movement of 4, the first thrust slide bearing 3
26 makes frictional contact with the annular flange 314c, and receives forward thrust through the annular flange 314c.

The second thrust slide bearing 328 is substantially equivalent to the first thrust slide bearing 326 and has a shallow annular recess formed in the front end face of the inner block 320 along the periphery of the opening 323. It is fixedly arranged by a plurality of pins 329 inside 320a. The second thrust slide bearing 328 is the radial thrust bearing 325.
Surrounds the front end portion of the above and faces the rear end surface of the annular flange 314c. The front end face of the second thrust slide bearing 328 slightly projects from the front end portion of the inner block 320. The front end surface of the pin 329 is below the front end surface of the second thrust slide bearing 328. By the axial movement of the drive shaft 314, the second thrust slide bearing 328 makes frictional contact with the annular flange 314c, or the annular flange 31.
It receives rear thrust through 4c.

First and second thrust slide bearings 32
6 and 328 are preferably formed from two annular members sandwiched together as a lamina. One annular member is preferably made of steel and the other annular member is preferably made of Teflon impregnated phosphor bronze. The thrust slide bearings 326 and 328 are arranged inside the annular notch 213 and the shallow annular recess 320a, respectively, with the phosphor bronze annular member facing the annular flange 314c.

In this structure, the refrigerant and the lubricating oil introduced into the second discharge side space 380 via the fluid passage 395 flow into the hollow space 481 via the capillary tube 500 and the conduit 150, and further, the first space Of the thrust slide bearing 326 into the hollow space 381 through the axial gap 382. Next, the fluid passes through the fluid passage 371, the axial gap 372, the boss 343 and the radial plain bearing 345.
It flows into the gap created between the gaps and finally the hollow space 3
Flows into 73. Alternatively, it flows into the hollow space 373 through the clearance between the flange of the annular flange 314c and the sliding member 328, and further through the clearance between the cylindrical rotor 314a and the slide bearing 325. The refrigerant and the lubricating oil guided to the hollow space 373 pass through the Oldham coupling mechanism 350 and lubricate it, and finally flow out into the suction side space 370 at a position outside the spiral members 332 and 342.

In the scroll type refrigerant compressor shown in FIG. 1, since the support plate as described in the description of the prior art is not used, the number of parts can be considerably reduced. This also facilitates the assembly process.

A scroll type refrigerant compressor as a scroll type flow moving device according to a second embodiment of the present invention will be described with reference to FIGS. 4 (a) and 4 (b). The same parts as those of the scroll-type refrigerant compressor in FIG. 1 are designated by the same reference numerals, and the difference from them is mainly described.

The second annular sleeve 212 has a rear end surface 212.
It has a plurality of grooves formed in d, for example four similar grooves 215. The groove 215 is the second annular sleeve 2
12 extend radially at equal angular intervals through the openings 12 and
1a includes a second annular sleeve 212 and an annular front protrusion 32
1 to communicate with the gap 481 (FIG. 1).
The holes 214 are preferably substantially rectangular in radial cross section.

A scroll type refrigerant compressor as a scroll type fluid moving device according to a third embodiment of the present invention will be described with reference to FIGS. 5 (a) and 5 (b). The same parts as those of the scroll-type refrigerant compressor in FIG. 1 are designated by the same reference numerals, and the difference from them is mainly described.

The second annular sleeve 212 has a rear end face 21.
2d and an annular notch 216 formed in the outer peripheral region of the rear end face 212d. A plurality of holes 217 extend from the annular cutout 216. Annular cutout 2
16 is substantially the second annular portion 212b and the opening 31
It is preferably concentric with 1a.

A scroll type refrigerant compressor as a scroll type flow moving device according to a third embodiment of the present invention will be described with reference to FIGS. 6 (a) and 6 (b). The same parts as those of the scroll-type refrigerant compressor in FIG. 1 are designated by the same reference numerals, and the difference from them is mainly described.

The second annular sleeve 212 has a rear end surface 212.
It has a plurality of grooves formed in d, for example four similar grooves 218. The groove 218 is the second annular sleeve 2
12 to extend in the radial direction at equal angular intervals through the opening 3
11a includes a second annular sleeve 212 and an annular front protrusion 3
21 to communicate with the gap 481 (FIG. 1).

A scroll type refrigerant compressor as a scroll type fluid moving device according to a third embodiment of the present invention will be described with reference to FIGS. 7 (a) and 7 (b). The same parts as those of the scroll-type refrigerant compressor in FIG. 1 are designated by the same reference numerals, and the difference from them is mainly described.

The adjusting mechanism includes an annular flange 314c provided on the drive shaft 314 (FIG. 1) and a second annular sleeve 51.
2, a first thrust slide bearing 326, and a second thrust slide bearing 328. The second annular sleeve 512 projects from the periphery of the opening 311a and surrounds the inner end of the drive shaft 314.

The second annular sleeve 512 has an annular portion 512a extending from the front end side plate 211 and a rear end face 51.
2b. The second annular sleeve 512 has an annular cutout 51 formed in the inner peripheral region of the rear end surface 512b.
3 and a plurality of holes 5 extending from the annular cutout 513.
14 (only one is shown). The annular cutout portion 513 is substantially concentric with the annular portion 512a and the opening 311a. At least one groove 515 extends radially from the opening 311a to the outer peripheral surface of the second annular sleeve 512. The groove 515 is formed on the rear end surface 512b of the sleeve 512 and partially intersects the cutout portion 513. One open end of the groove 515 is connected to the conduit 150 so that the conduit 150 is connected to the hollow space 481.
Face to face.

With reference to FIGS. 8A and 8B, a scroll type refrigerant compressor as a scroll type flow moving device according to a third embodiment of the present invention will be described. The same parts as those of the scroll-type refrigerant compressor in FIG. 1 are designated by the same reference numerals, and the difference from them is mainly described.

At least one conduit 516 is provided in the opening 3
It extends from 11a to the outer peripheral surface of the second annular sleeve 512 in the radial direction. One open end of conduit 516 is connected to conduit 150 such that conduit 150 is connected to hollow space 481.
(Fig. 1).

Although various embodiments have been described above, the present invention is not limited to those embodiments, and various modifications can be made without departing from the spirit and scope of the present invention. Needless to say. For example,
Although a particular scroll-type fluidic device has been described, the present invention is applicable to other fluidic devices.

[0062]

As described above, according to the present invention,
It is possible to provide a scroll-type fluid device that has a reduced number of parts and can be easily assembled despite having the axial movement adjustment mechanism.

[Brief description of drawings]

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

FIG. 2 is a partially enlarged sectional view of an axial movement adjustment mechanism in the compressor shown in FIG.

3A is a partially enlarged cross-sectional view of a support portion of a housing for supporting the axial movement adjusting mechanism of FIG. 2, and FIG. 3B is an enlarged side view taken along line 3-3 of FIG. .

FIG. 4 (a) is a partially enlarged cross-sectional view of a supporting portion of a housing for supporting an axial movement adjusting mechanism according to a second embodiment of the present invention, and FIG. ) Is an enlarged side view similar to FIG.

5A is a partially enlarged cross-sectional view of a supporting portion of a housing for supporting the axial movement adjusting mechanism according to the third embodiment of the present invention, and FIG. 5B is a sectional view of the supporting portion shown in FIG. ) Is an enlarged side view similar to FIG.

6A is a partially enlarged sectional view of a supporting portion of a housing for supporting an axial movement adjusting mechanism according to a fourth embodiment of the present invention, and FIG. 6B is a sectional view of the supporting portion shown in FIG. ) Is an enlarged side view similar to FIG.

7A is a partially enlarged cross-sectional view of a support portion of a housing for supporting an axial movement adjusting mechanism according to a fifth embodiment of the present invention, and FIG. 7B is a sectional view of the support portion shown in FIG. ) Is an enlarged side view similar to FIG.

FIG. 8A is a partially enlarged sectional view of a supporting portion of a housing for supporting the axial movement adjusting mechanism according to the sixth embodiment of the present invention, and FIG. 8B is a sectional view of the supporting portion shown in FIG. ) Is an enlarged side view similar to FIG.

FIG. 9 is a vertical sectional view of a conventional scroll-type refrigerant compressor.

[Explanation of symbols]

 150, 516 Conduit 212, 311b, 311d, 512 Annular sleeve 212a, 212b, 512a Annular part 212c Shoulder part 212d, 311e, 512b Rear end face 213, 400c, 513 Annular notch part 214, 344a, 400b, 514 Hole 215, 218 515 groove 300 compressor 310 compressor housing 311 front end side plate 311a, 323 opening 311c shaft seal space 312 cup type casing 313, 317, 338, 401 bolt 314 drive shaft 314a cylindrical rotor 314b pin member 314c annular flange 315 O-ring 316 Radial bearing 318 Electromagnetic clutch 318a Pulley 318b Ball bearing 318c Electromagnetic coil 318d Armature plate 319 Screw 320 Annular recess 321 Annular front protrusion 322 Annular rear protrusion 325, 345 Radial plain bearing 326, 328 Thrust plain bearing 327, 329 pin 330 Fixed scroll 331, 341 Circular end face plate 332, 342 Helical member 333 Outer peripheral wall 335 Discharge port 336 Reed valve member 337 Retainer 340 Orbiting scroll 343 Annular boss 344 Bushing 344a, 400b Hole 346 Snap ring 347 Balancing weight 350 Oldham coupling mechanism 360, 380 Discharge side space 370 Suction side space 371, 395 Fluid passage 372, 382, 400a Void 373, 381, 381, 481 Hollow space 390, 390a Fluid pocket 400 Annular support plate 400c Annular notch 410 Fluid inlet 420 Outlet 414 Shaft seal mechanism 500 Capillary

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[Procedure amendment]

[Submission date] April 15, 1996

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Correction target item name] All drawings

[Correction method] Change

[Correction content]

FIG.

[Fig. 2]

[Figure 3]

[Figure 4]

[Figure 5]

[Figure 6]

[Figure 7]

[Figure 8]

[Figure 9]

Claims (9)

[Claims] 1. A housing having a fluid inlet and a fluid outlet, a stationary member disposed inside the housing, having a first end plate, and a first spiral member extending from the first end plate. A scroll and a orbiting scroll disposed inside the housing, having a second end plate, and having a second spiral member extending from the second end plate, the first and second spirals An orbiting scroll in which the members fit together with an angular offset and a radial offset to form a plurality of linear contacts defining at least a pair of sealed fluid pockets; and a drive shaft axially disposed within the housing. Equipped with
A drive mechanism operatively connected to the orbiting scroll to provide a orbiting motion of the orbiting scroll; an inner block fixedly disposed inside the housing to support a portion of the drive shaft; A rotation preventing mechanism for preventing rotation of the orbiting scroll during its orbiting motion; and an axial movement adjusting mechanism arranged between the inner block and the housing for adjusting the axial movement of the drive mechanism. Wherein the axial movement adjusting mechanism is an annular flange extending radially from the outer surface of the drive shaft, and a first end surface of the annular flange of the drive shaft formed in the inner block. A first annular support portion having a first sliding means for slidably contacting with the housing and extending integrally from the housing. And a second annular support portion having a second sliding means for slidably contacting the second end surface of the annular flange of the moving shaft. 2. The second annular support portion further includes a first annular portion extending rearward from the housing, a second annular portion extending from the first annular portion, and the second annular support portion. The scroll fluid device according to claim 1, further comprising a shoulder portion that connects one annular portion to the second annular portion. 3. The second annular support portion further includes a rear end surface, an annular cutout portion provided in the inner peripheral portion of the rear end surface and in which the sliding means is disposed, and extending from the cutout portion. 2. The scroll type fluid device according to claim 1, further comprising at least one hole for accommodating a pin member for fixing the sliding means in the second annular support portion. 4. The second annular support portion further includes a rear end surface and at least one groove extending radially from the inner surface to the outer peripheral surface along the annular cutout portion and the rear end surface. The scroll type fluid device according to claim 1, further comprising: 5. The scroll type fluid device according to claim 1, wherein the second annular support portion further includes at least one conduit that extends radially through the second annular support portion. 6. The scroll type fluid device according to claim 1, wherein the first and second sliding means are slide bearings. 7. The scroll type fluid device according to claim 1, wherein the first and second sliding means are resin members. 8. The housing further includes a first cup-shaped casing and a second casing attached to an open end surface of the first casing, wherein the second annular support portion is the second casing. The scroll type fluid device according to claim 1, wherein the scroll type fluid device extends integrally from the casing. 9. The scroll according to claim 1, further comprising an oil passage formed at least partially by the drive shaft and the inner block, wherein the axial movement adjusting mechanism is arranged inside the oil passage. Type fluid device.