JP2004332695A - Movable member supporting mechanism and scroll compressor equipped with the supporting mechanism - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a thrust bearing mechanism having a sufficient thrust force bearing force with a simple configuration and having preferable properties in vibration and noise without a reciprocating member. <P>SOLUTION: The scroll compressor comprises a housing and a movable scroll moving around the housing, and further comprises the movable member supporting mechanism having plates respectively attached to the housing and the movable scroll to face each other and a plurality of rods interposed between the facing plates in the circumferential direction. In the movable member supporting mechanism, both end faces of the rod are formed like a convex spherical surface. One end face of the rod is in contact with the plate at the housing side, whereas the other end face of the rod is in contact with the plate at the movable scroll side. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a mechanism for supporting a moving load, particularly to a scroll compressor, and more particularly to a thrust force receiving (supporting) structure of a scroll compressor used for compressing a refrigerant, and particularly to operating CO2. The effect is great when applied to a compressor using a fluid.
[0002]
[Prior art]
Scroll compressors are widely used as compression mechanisms for compressing various working fluids because of their characteristics of high efficiency and low noise due to their mechanism. However, the following problems occur when it is used as a compressor for CO2 gas, which has recently started to be used as a refrigerant for a heat pump.
That is, since the operating pressure of CO2 is about 10 times higher than that of a conventionally used refrigerant such as R134a, the thrust force applied to the movable scroll is particularly large in the case of a scroll compressor.
[0003]
On the other hand, in order to obtain the same refrigeration capacity, the volume flow rate thereof may be about 1/5 that of the conventional refrigerant, so that a small displacement volume of the compressor is sufficient. Eventually, it has a characteristic that a large thrust force applied to a relatively small movable scroll must be received by a thrust receiving mechanism having a limited size.
[0004]
As a thrust receiving mechanism of a movable scroll, there is a mechanism that receives a thrust force and enables revolving motion by arranging a large number of steel balls on the back surface of a head plate of a movable scroll that moves in a public manner (for example, Patent Document 1). reference). However, if this mechanism is applied to a CO2 compressor, the stress generated in the ball and the plate becomes excessive, and it becomes difficult to satisfy a predetermined life.
[0005]
In view of this, the related art discloses a mechanism that receives a thrust force by an orthogonal needle thrust receiving mechanism in which a contact stress is reduced by using a roller instead of a ball (for example, see Patent Document 2). However, this mechanism is complicated, expensive, and reciprocates, so that it has undesirable characteristics in terms of vibration noise of the compressor.
[Patent Document 1]
JP-A No. 9-42280 (page 4)
[Patent Document 2]
JP-A-2002-115675 (page 4)
[0006]
[Problems to be solved by the invention]
The present invention has been made in view of the above-described circumstances, and provides a thrust receiving mechanism having a simple structure, having sufficient resistance to receiving a thrust force, and having favorable characteristics in terms of vibration noise without a member that reciprocates. It is intended for that purpose.
[0007]
[Means for Solving the Problems]
According to the first aspect of the present invention, in order to achieve the above-described object, a fixed member, a movable member that swings with respect to the fixed member, and a movable member that is attached to the fixed member and supports the movable member. A movable member supporting mechanism, the movable member supporting mechanism includes a plate mounted on each of the fixed member and the movable member so as to face each other, and a plurality of plates interposed between the opposed plates. And a rod. In the movable member support mechanism, at least one end surface of the rod is formed in a convex shape, one end surface of the rod is in contact with the plate on the fixed member side, and the other end surface of the rod is It is characterized by being in contact with the plate on the movable member side.
[0008]
With this configuration, it is possible to provide a movable member supporting mechanism having a sufficient thrust receiving (supporting) resistance by disposing a large number of rods each having a small diameter and having a convex end surface and supporting the movable member. I can do it. Further, since there is no reciprocating member, it is possible to provide a movable member supporting mechanism having preferable characteristics in terms of vibration noise.
[0009]
According to a second aspect of the present invention, in the first aspect, at least one of the plates has a rod end holding means for positioning an end of the rod. .
With this configuration, the plurality of rods can be correctly positioned at predetermined positions.
[0010]
According to a third aspect of the present invention, in any one of the first and second aspects, at least one end face of the rod is formed in a convex spherical shape.
According to the present embodiment, a movable member having a large diameter and a convex spherical end surface is arranged to support the movable member, thereby enabling the movable member to move smoothly and having sufficient thrust receiving strength. A support mechanism can be provided.
[0011]
According to a fourth aspect of the present invention, in the third aspect, the diameter of the spherical surface of the end surface of the rod is substantially equal to the length of the rod.
According to this embodiment, regardless of the radial dimension of the rod, the movable member is supported by disposing a large number of rods, which are support members having the same load supporting capacity as the spherical bearing having a diameter corresponding to the length of the elongated rod. Accordingly, it is possible to provide a movable member supporting mechanism having a sufficient thrust receiving strength. Also, the rod can be easily manufactured from a sphere.
[0012]
According to a fifth aspect of the present invention, in the third aspect, the shape of both end faces of the rod is a convex spherical surface, the diameter of the spherical surface is substantially equal to the length of the rod, and The center of the spherical surface is at the same position, and the same position is substantially on the center axis of the rod.
According to this embodiment, in addition to the advantages of the above embodiments, the distance between the orbiting scroll and the housing does not change even when the orbiting motion is performed. Further, the arrangement and assembly can be carried out more easily because of the structural simplicity in arranging many rods and assembling many rods and the like.
[0013]
According to a sixth aspect of the present invention, in order to achieve the above-described object, a scroll compressor includes a housing and a movable scroll that revolves with respect to the housing. Each of the scrolls includes a movable member support mechanism having a plate mounted so as to face each other and a plurality of rods circumferentially interposed between the facing plates. In the movable member support mechanism of the scroll compressor, at least one end surface of the rod is formed in a convex shape, one end surface of the rod is in contact with the plate on the housing side, and the other end of the rod is The end surface is in contact with the plate on the movable scroll side.
[0014]
With this configuration, a movable member (scroll) support mechanism having a sufficient thrust receiving strength is provided by arranging a large number of rods having a small diameter and having a convex end surface and supporting the movable scroll (member). A scroll compressor can be provided. Further, since there is no reciprocating member, it is possible to provide a scroll compressor having a movable member supporting mechanism having preferable characteristics in terms of vibration noise.
[0015]
According to a seventh aspect of the present invention, in the sixth aspect, at least one of the plates has a rod end holding means for positioning an end of the rod. .
With this configuration, the plurality of rods can be correctly positioned at predetermined positions.
[0016]
According to an eighth aspect of the present invention, in any one of the sixth and seventh aspects, at least one end face of the rod is formed in a convex spherical shape.
According to the present embodiment, a movable member having a small diameter and a plurality of rods having a convex spherical end surface is arranged to support the movable scroll, thereby enabling the movable scroll to move smoothly and having sufficient thrust receiving strength. A scroll compressor having a support mechanism can be provided.
[0017]
According to a ninth aspect of the present invention, in the eighth aspect, the diameter of the spherical surface of the end surface of the rod is substantially equal to the length of the rod.
According to this embodiment, regardless of the radial dimension of the rod, the movable scroll is supported by arranging a large number of rods, which are support members having the same load supporting capacity as the spherical bearing having a diameter corresponding to the length of the elongated rod. Accordingly, it is possible to provide a scroll compressor having a movable member supporting mechanism having sufficient thrust receiving strength. Also, the rod can be easily manufactured from a sphere.
[0018]
According to a tenth aspect of the present invention, in the configuration of the eighth aspect, the shape of both end surfaces of the rod is a convex spherical surface, the diameter of the spherical surface is substantially equal to the length of the rod, and The center of the spherical surface is at the same position, and the same position is substantially on the center axis of the rod.
According to this embodiment, in addition to the advantages of each of the above embodiments, the arrangement and the simplicity in arranging a large number of rods and assembling a large number of rods and the like are structurally symmetric and simple. The assembly can be performed more easily, and the load can be more uniformly supported by each rod.
[0019]
According to an eleventh aspect of the present invention, in any one of the sixth and seventh aspects, the shape of the rod end surface is a convex conical shape having the same apex angle at both ends.
According to this embodiment, since the contact state between the rod and the plate can be changed from point contact to line contact, the allowable thrust load can be increased. Further, the sliding of the contact portion becomes substantially zero, and the wear of the contact portion can be reduced.
[0020]
According to a twelfth aspect of the present invention, in any one of the seventh to eleventh aspects, the holding means is a holding plate disposed on the orbiting scroll and the housing, and Is a holding plate having small holes to be fitted.
According to this embodiment, a plurality of rods can be correctly and easily positioned at predetermined positions.
[0021]
According to a thirteenth aspect of the present invention, in the twelfth aspect, the small hole of the holding plate is a small hole having an R portion which is formed by press working.
According to the present embodiment, it is possible to more easily manufacture the holding plate to be fitted with the rod. Furthermore, the rocking movement of the rod is possible without the risk that the corners of the end face of the rod will cut the small hole surface of the holding plate.
[0022]
According to a fourteenth aspect of the present invention, in any one of the seventh to eleventh aspects, the holding means is a member having a conical small hole.
According to this embodiment, the holding plates provided on both the movable scroll side and the housing side may be provided on only one side. Further, the entire assembly of the rod, the holding plate and the like becomes easy.
[0023]
According to a fifteenth aspect of the present invention, in any one of the sixth to fourteenth aspects, the plurality of rods are integrated by a positioning ring.
According to this embodiment, since the rod can be held by the positioning ring at the time of assembling, the entire assembling such as assembling of the rod becomes easy, and the ring does not hinder the swinging movement of the rod.
[0024]
According to a sixteenth aspect of the present invention, in any one of the seventh to tenth and twelfth to fifteenth aspects, a ring-shaped groove having an arc-shaped cross section is formed in a portion of the plate in contact with the rod end face. Is formed.
According to this embodiment, since the contact state between the rod and the plate approaches the point contact to the line contact, the stress generated in the contact portion is reduced, and as a result, the thrust force load capability can be increased.
[0025]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, one embodiment of a scroll compressor of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a schematic cross-sectional view of a scroll compressor 1 according to a first embodiment of the present invention. The compressor 1 of the present embodiment is a hermetic type and is a compressor of an air conditioner for a vehicle or the like. The compressor 1 includes a cylindrical housing 4 surrounding the entire compressor, and lids 5a and 5b at both ends, which are hermetically joined by welding. In the housing 4, a motor part 30 as a driving part is provided at a front part, a middle housing 6 constituting a central part of the housing 4 at a center part, and a compression part 40 for compressing a refrigerant such as CO2 at a rear part. Provided.
[0026]
The motor unit 30 includes a stator 21 fixed to the housing 4, a rotor 22 formed of a plurality of permanent magnets therein, and a rotating shaft 8 passing through the center inside the stator 21. Is configured. The rotor 22 is fixedly supported by the rotating shaft 8, and the rotating shaft 8 is rotatably supported by the middle housing 6 and the like via bearings 7a and 7b.
[0027]
The crank-shaped end 8a of the rotating shaft 8 is connected to the compression section 40 via a revolution drive section, and transmits the driving force of the motor section 30 to the compression section 40. That is, the shaft end 8a, the bush 9, the bearing 7c, and the boss 10a of the movable scroll 10 form a revolution drive unit. The fixed scroll 11 is fixed to the middle housing 6, and a rotation preventing mechanism (not shown) between the fixed scroll 11 and the end plate of the movable scroll 10 that allows only the revolution of the movable scroll 10 to prevent rotation. Is provided. The movable scroll 10 has a spiral blade and an end plate, and the fixed scroll 11 has a spiral blade and an end plate that mesh with the spiral blade of the movable scroll 10. The compression unit 40 includes the orbiting scroll 10, the fixed scroll 11, the revolving drive unit, and the like.
[0028]
With the above configuration, when the rotating shaft 8 rotates, the rotating force is transmitted to the movable scroll 10 via the end 8a of the rotating shaft 8, the bush 9, and the bearing 7c. Since the end portion 8a is eccentric with respect to the rotating shaft 8 and the rotation of the movable scroll 10 is prevented by the rotation preventing mechanism, the transmitted rotating force causes the spiral movable scroll 10 to also move to the spiral fixed scroll. Orbit around 11. At this time, a working chamber 13 is formed between the movable scroll 10 and the fixed scroll 11, and the working chamber 13 continuously decreases in volume from the outer peripheral side toward the center according to the revolving motion of the movable scroll 10. As a result, the refrigerant sucked from the outer peripheral side of the working chamber 13 is compressed and discharged to the discharge chamber 16 through the discharge port 23 provided at the center of the fixed scroll 11. In this way, the compressor operates by the rotation of the motor.
[0029]
Along with the rotational force, a thrust force in the axial direction of the rotating shaft 8 due to compression of the gas refrigerant and the like acts on the orbiting scroll 10. In the present embodiment, a rod 3 is provided to receive the thrust force, which constitutes the present invention. The rod 3 is provided between the middle housing 6 and the back surface of the movable scroll 10 as shown in FIG. 1, and further has a steel plate 101 in contact with the end face of the rod 3 on the back surface of the movable scroll 10. The holding plate 102 for holding the position of the rod end within a predetermined range is integrated with the movable scroll 10. On the middle housing 6 side, there are provided a plate 401 and a holding plate 402 having the same role as the plate 101 and the holding plate 102.
[0030]
FIG. 2 shows the details of the rod 3. In the present embodiment, as shown in FIG. 2, the rod 3 has an elongated cylindrical shape. Both end surfaces 3a and 3b of the rod 3 form part of a spherical surface, and the diameter D of the spherical surface is set to be equal to the overall length L of the rod. In other words, it is a shape obtained by cutting out a sphere with a predetermined diameter with its center line as the axis. This shape was born from the fact that when a ball is used as a thrust receiving member, only a very limited portion of the ball comes into contact with the plate. In order to receive a thrust force with a low contact stress, it is necessary to increase the ball diameter. However, by increasing the diameter, the number of balls that can be installed in a predetermined place decreases. That is, the thrust force load capability cannot be increased simply by increasing the ball diameter. On the other hand, in the rod 3 having the shape of the present invention, the end faces 3a and 3b subjected to the substantial thrust load have a large sphere diameter, but the rod diameter involved in the arrangement is significantly larger than the sphere diameter regardless of the end face sphere diameter. Since the diameter can be reduced, a large number of rods 3 can be disposed on the back surface of the end plate of the movable scroll 10, and a sufficient thrust force supporting (load) ability can be provided.
[0031]
In the scroll compressor 1, the orbiting scroll 10 performs a revolving motion, that is, a swinging motion. FIG. 3 is a view showing the operation of the rod 3. For simplicity, one rod 3 is shown as a representative example, and the plate 101 of the movable scroll 10 swings in a swing range indicated by 2r in the figure. 4 shows the displacement of the rod 3 in the case of performing the above. Here, r is the revolution radius of the movable scroll 10. As shown in the drawing, the rod 3 makes a tilting movement within a certain range (for example, a range from the display of the dotted line to the display of the two-dot chain line), but indicates that the load can be received by the spherical portion of the rod end surface. Further, since the spherical diameter of the spherical end portion is set equal to the length L of the rod 3, the distance between the plates 101 and 401 does not change. That is, the rod 3 has exactly the same operation as the case where a sphere having a substantial sphere diameter L is provided.
[0032]
In FIG. 1, holding plates 102 and 402 are holding members for the rod 3 and play a role of holding the rod end in a predetermined position. That is, the holding plates 102 and 402 are provided with a number of small holes indicated by 102a and 402a, respectively. The rod ends are fitted into the small holes 102a and 104a, and the rod ends are kept in a predetermined position during operation. Become a. The diameters of the small holes 102a and 402a are set slightly larger than the diameter of the rod, thereby enabling the necessary inclination of the rod.
FIG. 4 is a view showing the movable scroll 10 from the back. The holding plate 102 is provided with a plurality of small holes 102a, and the plate 101 is provided at the bottom thereof. The end of the rod 3 fits into each small hole 102a. A set screw 102b plays a role of fastening the holding plate 102 and the plate 101 to the movable scroll 10.
[0033]
In the present embodiment, the small holes 102a and 402a penetrate the holding plates 102 and 402, respectively. 1, the holding plate 402 plays the same role as the holding plate 102, and similarly to the holding plate 102, the small holes 402a are arranged in the same arrangement shape as the small holes 102a. The rod 3 is maintained at a predetermined position by the action of the two holding plates 102 and 402, so that the thrust of the movable scroll 10 can be constantly received by the spherical portion of the rod end surface.
[0034]
FIG. 5 shows a second embodiment of the present invention. Compared with the first embodiment, the arrangement of the small holes 102a and 402a provided in the holding plates 102 and 402 is different.
FIG. 5 shows another example of the arrangement of the small holes 102a and 402a. The small holes 102a are arranged on the double concentric circle in the holding plate 102 of the movable scroll 10, the number of rods is increased, and the thrust force supporting capacity is increased. This is an example of an improved version. The number of rods 3 to be provided is determined by a desired load supporting capacity.
The small holes 402a of the holding plate 402 are formed similarly to the small holes 102a. Configurations other than those described above are basically the same as those of the first embodiment, and a description thereof will not be repeated.
[0035]
FIG. 6 is a side sectional view of a third embodiment of the present invention. The configuration of the holding plates 102 and 402 is different from those of the first and second embodiments. The holding plates 102 and 402 of the present embodiment are provided with a plurality of small holes 102a and 402a for holding the rod 3 by pressing a thin steel plate, for example. The small holes 102a and 402a still pass through the holding plates 102 and 402, respectively. The holding plates 102 and 402 have basically the same shape, and the edges of the small holes 102a and 402a are easily formed with a shape protruding into a crater shape by being manufactured by pressing as shown in FIG. It is possible and this shape acts to guide the rod 3. Smooth curvature portions (R) are provided on the sides of the plates 101 and 401 at the corners of the small holes 102a and 402a, so that when the rod 3 swings, the corner 3C of the rod end surface is formed. The swinging can be performed without the risk of shaving the small hole surfaces of the holding plates 102 and 402. Configurations other than those described above are basically the same as those of the first and second embodiments, and a description thereof will be omitted.
[0036]
FIG. 7 shows a fourth embodiment of the present invention in a side sectional view. The configuration of the holding plate 402 is different from those of the first to third embodiments. In the present embodiment, the holding plate 402 attached to the middle housing 6 is formed in an elongated cylindrical or ring shape, and the small holes 402c formed in the holding plate 402 are shown in FIG. As described above, the rod 3 is in the shape of a frustum of a deep hole, and the rod 3 can still swing in the small hole 402c. In this embodiment, the rod 3 is kept in a predetermined position by one holding plate 402. This is an example that enables By adopting this shape, the holding plate provided on both the movable scroll 10 and the middle housing 6 can be used by only one of them, and there is an advantage that the entire assembly is easy. .
In this case, the holding plate 102 on the movable scroll 10 side is deleted. Further, a mode in which the holding plate 402 is attached to the movable scroll 10 is also possible.
[0037]
FIGS. 8A and 8B show a fifth embodiment of the present invention in a side sectional view (FIG. 8A) and a three-dimensional view (FIG. 8B). It is a modification of the third embodiment. This embodiment is an embodiment for facilitating the assembly of the thrust force receiving structure. Since the end surfaces of the plurality of rods 3 are spherical, the falling position is not easily determined during assembly, and it is difficult to fit the holding plates 102 and 402 into the small holes 102a and 402a. In this embodiment, as shown in FIG. 8A, the rod 3 is assembled with the positioning ring 15 regulating the rod 3 at a predetermined interval. The positioning ring 15 has flexibility such as rubber and resin. Made of material. FIG. 8B is a three-dimensional view showing a state where the rod 3 is disposed on the positioning ring 15. The ring 15 has a hole 15a having a diameter slightly smaller than the diameter of the rod 3, and the rod 3 is inserted and installed. In this way, a plurality of rods 3 can be easily arranged at predetermined positions of the compressor. Since the ring 15 is flexible, it does not hinder the swinging movement of the rod 3 during operation. In the present embodiment, the positioning ring 15 has an annular flat plate shape, and basically has the same number of holes 15a as the rods 3 as can be seen from FIG. 8B, but has other shapes and configurations. Is also good. In the present embodiment, the configuration other than having the positioning ring 15 is basically the same as that of the third embodiment, and the other description is omitted. In the first and second embodiments, a configuration having the positioning ring 15 may be adopted.
[0038]
An embodiment (invention) for increasing the thrust force supporting (loading) capability will be described below. FIG. 9 is a partially enlarged side sectional view of the sixth embodiment of the present invention, which is a modification of the first embodiment. The features of this embodiment are the second to fifth embodiments. The present embodiment is also applicable to the embodiment. In the above-described embodiment, the surface where the rods 3 of the plates 101 and 401 are in contact with each other is a flat surface. However, in the plate 101 of the present embodiment, the contact portion of the plate 101 with the rods 3 has a ring shape (partially spherical). ) Groove 101c is provided. As shown in FIG. 9, the groove 101c has a shape such that left and right symmetrical spherical concave portions are formed on the left and right with respect to the point Q of the center axis of the revolving motion of the orbiting scroll 10. The radius of the deepest part (point P) of the ring-shaped groove 101c (the distance on the plane from the center Q of the orbital movement to the deepest part P) is set to approximately 1/2 of the orbital radius r of the orbiting scroll 10. The cross-sectional shape of the groove 101c is an arc having a radius equal to or slightly larger than the radius 半径 D of the spherical surface at the tip of the rod (indicated by R in the drawing). By doing so, since the contact form of the rod 3 and the plate 101 approaches point contact to linear contact, the stress generated at the contact portion is reduced, and as a result, the thrust force supporting (load) ability can be increased.
Configurations other than those described above are basically the same as those of the first and second embodiments, and a description thereof will be omitted. A similar spherical (ring) -shaped groove may be provided in the plate 401 on the middle housing 6 side.
[0039]
FIG. 10 shows a side sectional view of the seventh embodiment of the present invention. In the embodiment shown in FIG. 10, unlike the previous examples (spherical end surfaces), both end surfaces of the rod 3 have a conical shape. By making the conical shape, the contact form can be linear contact as in the embodiment of FIG. 9, so that the allowable load can be increased.
The apex angle α of the cone is preferably α = 2 · arccos (r / L), where L is the total length of the rod (the distance between the vertices of the cone, P1 and P2) and r is the orbital radius of the orbiting scroll. . By adopting these specifications, slippage of the contact portion during the orbital movement is zero geometrically, and wear of the contact portion is reduced.
In the present embodiment, only the end face 3a of the rod 3 on the movable scroll 10 side may have a conical shape, and the other end face 3b on the middle housing 6 side may have a spherical shape.
[0040]
In each of the above embodiments, if the approximate dimensions are mentioned, the excluded volume is 3 to 6 cm. ³ In the scroll compressor of (1), the length (L) of the rod 3 is, for example, 10 to 50 mm, the diameter (d) is 4 to 8 mm, and the number of the rods is 8 to 50.
To facilitate understanding in the above description, similar components are denoted by the same reference numerals throughout the embodiments.
[0041]
Next, effects and operations of the above embodiment will be described.
The following effects can be expected from the scroll compressor according to the first embodiment of the present invention.
By disposing a large number of rods 3 each having a small diameter and a spherical end surface and supporting the movable scroll 10, a thrust receiving (supporting) mechanism having a sufficient thrust receiving (supporting) resistance can be provided.
-Since there is no reciprocating member, it is possible to provide a thrust receiving mechanism having preferable characteristics in terms of vibration noise.
[0042]
According to the scroll compressor of the second embodiment of the present invention, the following effects can be expected in addition to the above.
Since the rods 3 can be arranged in double concentric circles, the number of rods 3 can be further increased, so that a thrust receiving mechanism having a greater thrust receiving strength can be provided.
[0043]
According to the scroll compressor of the third embodiment of the present invention, the following effects in addition to the above can be expected.
-The holding plates 102 and 402 to which the rod 3 fits can be manufactured more easily.
The rocking movement of the rod 3 is possible without the risk that the corner 3C of the end face of the rod 3 will cut the small hole surfaces of the holding plates 102 and 402.
[0044]
According to the scroll compressor of the fourth embodiment of the present invention, the following effects can be expected in addition to the above.
The holding plates 102 and 402 provided on both the movable scroll 10 and the middle housing 6 may be provided only on one side.
-The entire assembly of the rod 3, the holding plate 102 and the like becomes easy.
[0045]
According to the scroll compressor of the fifth embodiment of the present invention, the following effects can be expected in addition to the above.
The rod 3 can be held at the time of assembling by the positioning ring 15, so that the entire assembling such as the assembling of the rod 3 becomes easy, and the ring 15 does not hinder the swinging movement of the rod 3.
[0046]
According to the scroll compressor of the sixth embodiment of the present invention, the following effects can be expected in addition to the above.
-Since the contact state between the rod 3 and the plate 101 (401) approaches point contact to line contact, the stress generated at the contact portion is reduced, and as a result, the thrust force supporting ability can be increased.
[0047]
According to the scroll compressor of the seventh embodiment of the present invention, the following effects can be expected in addition to the above.
Also, since the contact state between the rod 3 and the plates 101 and 401 can be changed from point contact to line contact, the allowable thrust supporting load can be increased.
・ Sliding of the contact portion becomes almost zero, and wear of the contact portion can be reduced.
[0048]
The above-mentioned numerical values are numerical examples when applied to a CO2 scroll compressor, but of course, the mechanism of the present invention is not limited to CO2, and it may be applied to other refrigerants and air compressors. Not even.
Further, the mechanism according to the present invention, that is, the swing holding mechanism of the member that swings under a load is not limited to the application to the scroll compressor, and it is necessary to swingably hold the member that swings. Needless to say, it is widely applicable to certain mechanisms.
[0049]
Embodiments formed by combining the above embodiments may be implemented.
The above embodiment is an example of the present invention, and the present invention is not limited by the embodiment, but is defined only by matters described in the claims. It is feasible.
[Brief description of the drawings]
FIG. 1 is a schematic cross-sectional view of a scroll compressor according to a first embodiment of the present invention.
FIG. 2 shows details of a rod 3 of the scroll compressor of FIG. 1;
FIG. 3 is a side view showing the operation of the rod 3 of FIG. 2;
FIG. 4 is a plan view showing details of a holding plate 102 of FIG. 1 and small holes 102a formed therein.
FIG. 5 is a plan view corresponding to FIG. 4, showing details of a holding plate 102 and small holes 102a formed therein according to a second embodiment of the present invention.
FIG. 6 is a side sectional view showing a rod, a holding plate, and the like according to a third embodiment of the present invention.
FIG. 7 is a side sectional view showing a rod, a holding plate, and the like according to a fourth embodiment of the present invention corresponding to FIG.
FIG. 8A is a side sectional view showing a positioning ring, a rod, a holding plate, and the like according to a fifth embodiment of the present invention, similar to FIG. FIG. 8B is a three-dimensional view showing a state where the rod 3 is combined with the positioning ring 15 according to the fifth embodiment of the present invention.
FIG. 9 is a partially enlarged side sectional view showing a rod and a plate according to a sixth embodiment of the present invention.
FIG. 10 is a side view showing a rod, a holding plate, and the like according to a seventh embodiment of the present invention.
[Explanation of symbols]
1. Scroll compressor
3… Rod
4 ... Housing
5a, 5b ... lid
6. Middle housing
8 ... Rotary axis
9. Bush
10. Movable scroll
11 ... fixed scroll
13. Working chamber
16 ... Discharge chamber
21 ... Stator
22 ... rotor
30 Motor part
40 ... Compression unit
101 ... plate
102 ... holding plate
102a ... Small hole
401 ... plate
402 ... holding plate
402a ... Small hole

Claims (16)

In a device having a fixed member, a movable member that swings with respect to the fixed member, and a movable member support mechanism that is attached to the fixed member and supports the movable member, the movable member support mechanism includes:
A plate attached to each of the fixed member and the movable member so as to face each other;
A plurality of rods interposed between the opposed plates,
Has,
At least one end surface of the rod is formed in a convex shape,
One end surface of the rod is in contact with the plate on the fixed member side, and the other end surface of the rod is in contact with the plate on the movable member side,
A movable member support mechanism, characterized in that: 2. The movable member supporting mechanism according to claim 1, wherein at least one of the plates has a rod end holding means for positioning an end of the rod. The movable member supporting mechanism according to claim 1, wherein at least one end surface of the rod is formed in a convex spherical shape. The movable member support mechanism according to claim 3, wherein a diameter of a spherical surface of the end surface of the rod is substantially equal to a length of the rod. The shape of both end surfaces of the rod is a convex spherical surface, the diameter of the spherical surface is substantially equal to the length of the rod, and the centers of the two spherical surfaces are at the same position, and the same position is substantially the same as the rod. On the central axis,
The movable member support mechanism according to claim 3, wherein In a scroll compressor, this scroll compressor is
A housing,
A movable scroll that revolves with respect to the housing;
A plate further mounted on each of the housing and the movable scroll so as to face each other,
A plurality of rods circumferentially interposed between the opposed plates,
A movable member support mechanism having
In the movable member supporting mechanism,
At least one end surface of the rod is formed in a convex shape,
One end surface of the rod is in contact with the plate on the housing side, and the other end surface of the rod is in contact with the plate on the movable scroll side,
A scroll compressor, characterized in that: The scroll compressor according to claim 6, wherein at least one of the plates has a holding unit for the rod end for positioning the end of the rod. The scroll compressor according to claim 6, wherein at least one end surface of the rod is formed in a convex spherical shape. The scroll compressor according to claim 8, wherein the diameter of the spherical surface of the end surface of the rod is substantially equal to the length of the rod. The shape of both end surfaces of the rod is a convex spherical surface, the diameter of the spherical surface is substantially equal to the length of the rod, and the centers of the two spherical surfaces are at the same position, and the same position is substantially the same as the rod. On the central axis,
The scroll compressor according to claim 8, wherein: 8. The scroll compressor according to claim 6, wherein the rod end face has a convex conical shape having the same apex angle at both ends. The said holding means is a holding plate arrange | positioned at the said movable scroll and the said housing, Comprising: The holding plate which has a small hole with which the said rod end part fits, The Claim 7 characterized by the above-mentioned. A scroll compressor according to claim 1. 13. The scroll compressor according to claim 12, wherein the small holes of the holding plate are formed by press working and have small portions. The scroll compressor according to any one of claims 7 to 11, wherein the holding unit is a member having a conical small hole. The scroll compressor according to any one of claims 6 to 14, wherein the plurality of rods are integrated by a positioning ring. The scroll compressor according to any one of claims 7 to 10, and 12 to 15, wherein a ring-shaped groove having an arc-shaped cross section is formed in a portion of the plate where the rod end surface contacts. .

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