JPH02308990A - Scroll type compressor - Google Patents

Abstract

PURPOSE:To prevent vibration and early abrasion by arranging a plurality of circular recess portions at the opposite side face of the scroll portion of a movable scroll and a fixed basic plate facing thereto, and integrally connecting a disposing member disposed between the recess portion facing to each other. CONSTITUTION:Housings 2, 3 getting a fixed basic plate therebetween are provided, a fixed scroll 11 is provided in the housing 3. A movable scroll 12 is provided to opposite scroll portions 11b, 12b each other, recess portion forming plates 15, 16 are fitted to the fixed basic plate 4 and the movable scroll 12 with pins 17 respectively. A plurality of circular recess portions 18, 19 are circularly arranged to be provided to the recess portion forming plates 15, 16, a disposing member is disposed, a retaining ring 21 is engaged with a groove 20a to be connected integrally therewith to retain the disposing member. The vibration of the disposing member is prevented by the retaining ring to eliminate the generation of noises and early abrasion. And also its assembly becomes easy.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a scroll-type compressor 811 that includes a fixed scroll and a movable scroll, and particularly relates to a mechanism that prevents the movable scroll from rotating and allows it to revolve. It is.

[Prior Art] Conventionally, the revolution of a movable scroll in a scroll compressor I! As for the horizontal structure, for example, a structure as shown in Japanese Patent Laid-Open No. 59-28082 is known.

In this conventional configuration, as shown in FIG. 12, recess forming plates 33 and 34 are fixed to the end face of the movable scroll 31 and the opposite face of the fixed base plate 32 in the housing by a plurality of pins 35, etc. A plurality of recesses 36 and 37 are formed in an annular arrangement on the end face of the movable scroll 31 and the opposing face of the fixed base plate 32 by circular through holes provided in the recess forming plates 33 and 34, and between each opposing recess 36 and 37. A short cylindrical intervening member 38 is interposed therein.

Due to this revolution mechanism, the load in the thrust direction applied to the movable scroll 31 during scum compression is
The receiving is stopped by the contact between both end surfaces of the intervening member 38 and the bottom surfaces of the recesses 36 and 37, and the load in the radial direction is reduced by the outer circumferential surface of the interposed member 38 and the recess 36. ．． The bearing is stopped by contact with the inner circumferential surface of the movable scroll 37, preventing the movable scroll 31 from rotating and allowing it to revolve.

[Problem to be Solved by the Invention] However, the radial load applied to the movable scroll 31 during gas compression changes in the circumferential direction as the compression stroke changes, but in the conventional configuration described above, the load applied to the movable scroll 31 changes in the circumferential direction. 36. Since the interposed parts vi38 are individually inserted and arranged in the 37, among the plurality of interposed members 38 arranged substantially in an annular shape, there are interposed members that are not arranged approximately in half. 38 and the inner circumferential surfaces of the recesses 36 and 37, the receiver is stopped, and the outer circumferential surface of the intervening member 38 that is not arranged in the remaining half and the inner circumferential surface of the recesses 36 and 37 contact each other. A gap is formed between them. Due to this, when the gas is compressed, the half of the intervening member 38 that does not receive the load in the radial direction vibrates within the opposing recesses 36 and 37, causing abnormal noise or premature wear of the intervening member 38, etc. There was a problem with that.

In addition, in this conventional configuration, when assembling the revolution mechanism section, the recesses 36 and 37 are arranged such that the small intervening member 38 is not opposed to the recesses 36 and 37.
Since the intervening member 38 must be inserted and assembled one by one, the assembly is very troublesome, and there is also the problem that the intervening member 38 may be accidentally dropped into the compressor housing. there were.

This invention was made by focusing on the problems existing in the conventional technology, and its ``first objective is to prevent the intervening member from vibrating within the recess when compressing the scum.'' 1, it is possible to prevent the occurrence of different names and early wear of intervening members, etc., and when assembling the revolution mechanism,
It is an object of the present invention to provide a scroll compressor in which a plurality of intervening members can be easily and efficiently assembled between opposing recesses.

[Means for Solving the Problems] In order to achieve the above object, in the scroll compressor of the present invention, a spiral portion of the movable scroll and a mechanism for preventing rotation of the movable scroll and allowing revolution thereof are provided. A plurality of circular recesses are formed in an annular arrangement on the opposite surface and the opposite surface of the fixed substrate, and an intervening member is interposed between each of the opposing recesses. are integrally connected and held by a retaining ring.

[Function] In the scroll □ type compressor configured as described above, when the movable scroll is rotated and compression is performed,
By engaging the outer circumferential surface of the intervening member with the inner circumferential surface of the opposing recess, the movable scroll is received by the housing, and rotation of the movable scroll is prevented while allowing the movable scroll to revolve.

Nowadays, the radial load applied to the movable scroll changes in the circumferential direction as the compression stroke changes, but since the multiple intervening members are integrally connected and held by the retaining ring, Among the plurality of intervening members arranged in a circular ring, the receiver is stopped by contact between the outer circumferential surface of the intervening member arranged in half of the ring and the inner circumferential surface of the recess, and the remaining half of the interposed members are stopped. Even if a gap is formed between the outer circumferential surface of the intervening member and the inner circumferential surface of the recess, the intervening member of this half does not vibrate separately within the recess, and the vibration of the intervening member □An abnormal noise occurs due to 1. Therefore, it is possible to reliably prevent the possibility of premature wear of the intervening member etc. by 1υ.

Furthermore, when assembling the revolution mechanism, the multiple intervening members can be assembled between the opposing recesses with the holding links integrally connected and held in advance, making the assembly process easy and efficient. It can be done in a specific manner.

[Example] Hereinafter, a first example of a scroll type compressor embodying the present invention will be described.
An embodiment will be described in detail based on FIGS. 1 to 6.

As shown in FIG. 1, a housing 1 is composed of a front housing 2 and a rear housing 3, which are fixed by a plurality of through holes 1 to 3 (not shown) with the housings 2.3 or fixed board 4 sandwiched between them. A rotary shaft 5 is rotatably housed in the front housing 2 via a bearing 6, and an eccentric shaft 7 is protruded from the inner end surface of its large diameter portion. The balance weight 8 and the bushing 9 are supported by the eccentric shaft 7 so as to be relatively rotatable, and the relative rotation amount thereof is determined by the pin 1.
It is regulated to a predetermined amount by 0.

The fixed scroll 11 is housed and fixed within the rear housing 3, and is composed of a base end wall 11a and a spiral portion 11b. The movable scroll 12 is rotatably supported by the bushing 9 via a bearing 13 so as to face the fixed scroll 11, and has a base wall 12a and a spiral portion 1.2b.
It is composed of. And, as shown in Figure 2,
The spiral parts 11b and 12b of both scrolls 11.12 are in contact with each other at at least two places, and in this state, the base end walls 11a and 12a of both scrolls 11.12 and the spiral part 11b,
A compression chamber 14 is formed by 12b.

The recess forming plates 15 and 16 have a plurality of six circular recesses 1 attached to the fixed base plate 4 and the opposing surfaces of the base end wall 12a of the movable scroll 12 by a plurality of pins 17, respectively.
8.19 are arranged in an annular shape on the base@wall 12a of the movable scroll 12 and the opposing surface of the fixed substrate 4, respectively, by circular through holes provided in each of the recess forming plates 15.16. A short cylindrical intervening member 20 is provided in each of the opposing recesses 18°1.
9, and both end surfaces thereof are provided with opposing recesses 18,
1.9 are in contact with the bottom surface of each.

As shown in FIGS. 3 to 6, an annular retaining ring 21 made of a metal plate is interposed between the two recess forming plates 15 and 16, and a plurality of circular recesses 21a are formed on the outer periphery of the ring. They are formed at intervals. The engagement groove 20a is connected to each intervening member 20.
By engaging this engagement groove 20a with the recess 21a of the retaining link 21, the plurality of intervening members 20 are integrally connected and held to the outer periphery of the retaining link 21. There is.

As is clear from FIG. 3, the rotation +111
1] When the movable scroll 12 revolves with the rotation of the eccentric shaft 7 of 51-, each intervening member 20 rotates while its outer circumferential surface contacts the opposite side of the inner circumferential surface of the opposing recess 18.19. However, rotation of the movable scroll 12 is prevented. Note that the orbital radius of the movable scroll 12 is 2 times the difference between the diameter of the opposing recess 18 and 19 and the diameter of the interposed member 20.
It has doubled. The intake port 22 is connected to the rear housing 3.
The refrigerant scum introduced into the rear housing 3 from the suction port 22 is provided on the outer periphery of both scrolls 11 and 12.
It enters the compression chamber 14 in between and is compressed, and then passes through the discharge passage 24, which is releasably closed by the discharge valve 23, to the discharge chamber 2.
After being discharged into 5, it is led out from a discharge port 26 to an external cooling circuit.

Next, the operation of the scroll compressor configured as described above will be explained.

Now, in this compressor, when the eccentric shaft 7 is eccentrically rotated as the rotary shaft 5 rotates, the outer peripheral surface of the interposed member 20 comes into contact with a portion on the opposite side of the inner peripheral surface of the opposing recesses 18 and 1.9. The movable scroll 12 is allowed to revolve and is prevented from rotating. Due to the revolution of the movable scroll 12, the contact portions of the spiral portions 11b and 12b of both scrolls ii and 12 move toward the center of the compressor to perform compression, and the compressed refrigerant scum is discharged into the discharge passage 2.
It is discharged from.

At this time, both ends I of each intervening member 20 or the opposing recess is,
t9 is in contact with the bottom surface of the movable scroll 12, so that the load in the thrust direction acting on the movable scroll 12 is stopped from being received by the fixed base plate 4 via the intervening member 20. Further, the outer circumferential surface of each intervening member 20 is in contact with the inner circumferential surface of the recesses 18 and 19, so that the load in the radial direction acting on the movable scroll 12 is transferred to the fixed substrate 4 through the intervening member 20. Uke is stopped.

The radial load applied to the movable scroll 12 changes in the circumferential direction as the compression stroke changes, but in this embodiment, the load is integrally connected and held by a plurality of intervening members 20 or retaining links 21. Therefore, among the plurality of intervening members 20 arranged in a substantially circular ring,
The receivers are stopped by the contact between the outer circumferential surface of the intervening members 20 arranged in the 10th row and the inner circumferential surface of the recess 18. Even if a gap is formed between the outer circumferential surface and the inner circumferential surface of the recess 18°19, the intervening member 20 of this half
do not vibrate separately within the recesses 18 and 19. Therefore, abnormal noise is generated due to the vibration of the intervening member 2 degrees,
It is possible to prevent the opening peripheries of the intervening member 20 and the recesses 18 and 19 from wearing out prematurely.

In addition, in this embodiment, when assembling the revolution mechanism section, a plurality of intervening members 20 are inserted into the recesses 2 of the retaining ring 21 in advance.
1a so that it can be assembled between the opposing recesses 1.8.19 while being integrally connected and held,
Compared to the method of separately assembling a plurality of intervening members between the recesses, the assembling operation can be simplified and made more efficient.

[Another Embodiment] Next, another embodiment of the present invention will be described based on FIGS. 7 to 11.

First, in the second embodiment shown in FIG. 7, a short cylindrical intervening member 20 is divided into two members 27A and 27B, and a cylindrical protrusion 2 is provided on the end face of one member 27A.
7a is inserted into the circular through hole 28 formed in the retaining ring 21 from one side thereof, and the cylindrical protrusion 27b provided on the end surface of the other member 27B is inserted into the circular through hole 28 from the other side of the through hole 28. By fitting into the shaped protrusion 27a, the intervening member 2° is integrally connected and held via the retaining ring 21.

Next, in the third embodiment shown in FIG. 8, the holding link 21 is formed of a metal wire material, and an intervening member 2
A second plurality of recesses 21a are formed by bending.

Furthermore, in the fourth embodiment shown in FIG. 9, a plurality of recesses 18 and 19 are integrally formed on the opposing end surfaces of the fixed substrate 4 and the movable scroll 12, and the intervening member 20 is formed of a spherical body. . In addition, the retaining ring 21 is divided into two ring plates 29A and 29B, and both ring plates 2
A through hole 29a having a spherical or tapered shape is formed in 9A and 29B.

A spherical intervening member 20 is held between both sides by 29b.

In addition, in the fifth embodiment shown in FIG.
In the sixth embodiment shown in FIG.
A sawtooth-shaped uneven portion 30b for dispersing lubricating oil is formed on the outer peripheral edge of the retaining ring 21. According to these examples:
Since the mist-like lubricating oil contained in the refrigerant introduced through the suction port 22 is diffused through the small holes 30a or the uneven portions 30b as the holding link 21 revolves, the lubrication of the revolution mechanism can be improved.

[Effects of the Invention] This invention has the following features:
It is possible to prevent the intervening member from vibrating within the recess during gas compression, thereby preventing abnormal noises and early wear of the intervening member, etc., and when assembling the revolution mechanism, it is possible to prevent the intervening member from vibrating within the recess. This has an excellent effect in that it can be assembled easily and efficiently between the opposing recesses.

= 13-

[Brief explanation of the drawing]

1 is a sectional view showing a first embodiment of a scroll compressor embodying the present invention, FIG. 2 is a sectional view taken along line A-A in FIG. 1, and FIG. 3 is a sectional view taken along line B-- 4 is an enlarged partial sectional view of the revolution mechanism shown in FIG. 1, FIG. 5 is a partial sectional view taken along line C-C in FIG. 4, and FIG. FIG. 7 is a partially sectional side view of a holding link and an intervening member showing a second embodiment of the present invention; FIG. 8 is a third real square FIG. 9 is a partial sectional view of the revolution mechanism showing the fourth embodiment, and FIGS. 10 and 11 are the retaining ring and intervening member showing the fifth and sixth embodiments. FIG. 12 is a partial sectional view showing a conventional revolution mechanism. 1... Housing, 4... Fixed board, 11. ...
Fixed scroll, llb... Spiral part, 12... Movable scroll, 12b... Spiral part, 18.19... Recessed part, 20... Interposition member, 21... Holding link. Patent applicant: Toyoda Automatic Loom Works, Ltd.

Claims (1)

[Claims] 1. A fixed scroll is housed and fixed in the housing, and a movable scroll is housed and supported opposite the fixed scroll so that it cannot rotate on its axis but can revolve, and spiral portions that contact each other at at least two places are formed on opposing surfaces of both scrolls. However, in a scroll type compressor in which gas is compressed between both spiral portions by the revolution of the movable scroll, a mechanism that prevents rotation of the movable scroll and allows revolution is provided by a mechanism that prevents the rotation of the movable scroll and allows the revolution of the movable scroll. A plurality of circular recesses are formed in an annular arrangement on the side surface and the surface of the fixed substrate opposite thereto, and an intervening member is interposed between each of the opposing recesses. A scroll compressor that is integrally connected and held by a retaining ring.