Scroll Fluid Machine

Abstract

To provide a scroll fluid machine in which risk of breakage of a turning boss portion made of a resin due to a load received from a bearing can be reduced.SOLUTION: A scroll fluid machine comprises: a fixed scroll member in which a spiral fixed-side wall body is vertically disposed on one face of a fixed-side end plate; a turning scroll member 20 in which a spiral turning-side wall body 22 defining a compression chamber with the fixed-side wall body is vertically disposed on one face of a turning-side end plate 21 and a cylindrical turning boss portion 23 is disposed on the other face of the turning-side end plate 21; a reinforcement ring member 30 disposed on an inner periphery of the turning boss portion 23; and a bearing 81 which is disposed at an inner peripheral side of the reinforcement ring member 30 and to which a crank shaft is inserted. The turning scroll member 20 is formed of a resin material, and the reinforcement ring member 30 is formed of a material having strength and elasticity higher than those of the resin material for forming the turning scroll member 20.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present disclosure relates to a scroll fluid machine. [Background technology]

[0002] A scroll fluid machine, such as a scroll compressor, generally includes a fixed scroll member and an orbiting scroll member, and is configured such that a fluid is compressed / expanded in an enclosed space defined by the walls as the orbiting scroll member revolves in a state in which the spiral wall of the fixed scroll member and the spiral wall of the orbiting scroll member are meshed with each other.

[0003] Here, in addition to scroll fluid machines whose fixed scroll members and orbiting scroll members are made of metal such as aluminum, there are also scroll fluid machines whose fixed scroll members and orbiting scroll members are made of resin (for example, Patent Document 1). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 6141109 Summary of the Invention [Problem to be solved by the invention]

[0005] In such a scroll fluid machine, the orbiting scroll member is provided with a boss portion having a boss hole into which a bearing, into which the crankshaft is inserted, is fitted.

[0006] The load from the crankshaft acts on the boss portion via the bearing. However, if the orbiting scroll member is made of resin, there is a risk that the boss portion will be damaged because the strength and elastic modulus of the resin are smaller than those of boss portions provided on orbiting scroll members made of aluminum.

[0007] The present disclosure has been made in consideration of the above circumstances, and aims to provide a scroll fluid machine that can reduce the risk of a plastic rotating boss portion being damaged by the load received from a bearing. [Means for solving the problem]

[0008] In order to solve the above problems, the scroll fluid machine of the present disclosure employs the following measures. That is, a scroll fluid machine according to one aspect of the present disclosure comprises a fixed scroll member having a spiral-shaped fixed side wall body erected on one side of a fixed side end plate, a rotating scroll member having a spiral-shaped orbiting side wall body erected on one side of a orbiting side end plate which defines a compression chamber together with the fixed side wall body and has a cylindrical orbiting boss portion formed on the other side of the orbiting side end plate, a reinforcing ring member provided on the inner or outer peripheral surface of the orbiting boss portion, and a bearing provided on the inner peripheral side of the reinforcing ring member or the inner peripheral side of the orbiting boss portion and into which a crankshaft is inserted, wherein the orbiting scroll member is formed of a resin material, and the reinforcing ring member is formed of a material which has a higher strength and a higher elastic modulus than the resin material forming the orbiting scroll member. Effect of the Invention

[0009] According to the present disclosure, it is possible to reduce the risk of the resin swivel boss portion being damaged by the load received from the bearing. [Brief description of the drawings]

[0010] [Figure 1] 1 is a partial vertical sectional view of a scroll fluid machine according to a first embodiment of the present disclosure. [Diagram 2] 2 is a cross-sectional view taken along line II-II shown in FIG. [Diagram 3] FIG. 2 is a vertical cross-sectional view of the orbiting scroll member. [Figure 4] FIG. 4 is a bottom view of the orbiting scroll member. [Diagram 5] 4 is a vertical cross-sectional view of the orbiting scroll member showing the concave and convex portions of the reinforcing ring member. FIG. [Figure 6]4 is a vertical cross-sectional view of the orbiting scroll member showing a flange portion of the reinforcing ring member. FIG. [Figure 7] FIG. 4 is a longitudinal cross-sectional view of the orbiting scroll member showing a sloped portion of the reinforcing ring member. [Figure 8] FIG. 11 is a vertical cross-sectional view of an orbiting scroll member according to a second embodiment of the present disclosure. [Figure 9] FIG. 4 is a vertical cross-sectional view of the orbiting scroll member showing the uneven portion of the tooth base reinforcing member. [Figure 10] FIG. 4 is a vertical cross-sectional view of the orbiting scroll member showing a pin portion of the tooth base reinforcing member. [Figure 11] FIG. 4 is a vertical cross-sectional view of the orbiting scroll member showing the lattice portion of the tooth base reinforcing member. [Figure 12] FIG. 4 is a vertical cross-sectional view of the orbiting scroll member showing a through hole of the tooth base reinforcing member. [Figure 13] FIG. 13 is a bottom perspective view of an orbiting scroll member according to a third embodiment of the present disclosure. [Figure 14] 1 is a partial vertical cross-sectional view of a scroll fluid machine. [Figure 15] FIG. 4 is a bottom view of the orbiting scroll member. [Figure 16] FIG. 2 is a vertical cross-sectional view of the orbiting scroll member. [Figure 17] 13 is a vertical cross-sectional view showing a modified example of the fixed side wall body and the rotating side wall body. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] [First embodiment] Hereinafter, a scroll fluid machine according to a first embodiment of the present disclosure will be described with reference to the drawings. Although the scroll fluid machine of the present disclosure can be applied to a compressor and an expander, the following description will be given taking a compressor as an example.

[0012] As shown in FIG. 1, the scroll compressor includes a fixed scroll member 10, an orbiting scroll member 20, a crankshaft 71, and a housing 91 that accommodates these members.

[0013] The fixed scroll member 10 has a fixed end plate 11 and a fixed wall body 12. The fixed scroll member 10 is made of a metal material or a resin material. An example of the metal material is aluminum. An example of the resin material is a resin such as super engineering plastic, a short fiber composite material, etc. The fixed end plate 11 is a disk-shaped member. The fixed end plate 11 is fixed to the housing 91 by a fastening member (not shown). In this way, the fixed scroll member 10 is fixed to the housing 91. The fixed side wall body 12 is a spiral wall portion (see FIG. 2) standing on one surface (the lower surface in FIG. 1) of the fixed side end plate 11.

[0014] 3, the orbiting scroll member 20 has an orbiting side end plate 21, an orbiting side wall body 22, and an orbiting boss portion 23. The orbiting scroll member 20 is made of a resin material. Examples of the resin material include resins such as super engineering plastics, short fiber composite materials, and the like. The orbiting side end plate 21 is a disk-shaped member. The orbiting side wall body 22 is a spiral-shaped (see FIG. 2) wall portion standing from one surface (the upper surface in FIG. 1) of the orbiting side end plate 21. The orbiting side wall body 22 is engaged with the fixed side wall body 12 to define a compression chamber 95 together with the fixed side wall body 12. The swivel boss portion 23 is a cylindrical portion that stands upright from the other surface (the lower surface in FIG. 1, which faces the above-mentioned one surface) of the swivel-side end plate 21.

[0015] A reinforcing ring member 30 is provided on the inner peripheral surface of the rotating boss portion 23. The reinforcing ring member 30 is a cylindrical member. The reinforcing ring member 30 is made of a material having a higher strength and a higher elastic modulus than the resin material forming the orbiting scroll member 20. Examples of materials having a higher strength and a higher elastic modulus than the resin material include continuous fiber UD (unidirectional) material, long fiber material, aluminum material, iron, titanium, etc.

[0016] The resin material forming the revolving scroll member 20 can have a variety of strengths and elastic moduli depending on the selection, but the present embodiment is characterized in that the reinforcing ring member 30 is formed by selecting a material that has a higher strength and elastic modulus than the selected resin material.

[0017] The reinforcing ring member 30 is integrated with the orbiting scroll member 20 when the orbiting scroll member 20 is injection molded. That is, the reinforcing ring member 30 is provided in the orbiting scroll member 20 by insert molding.

[0018] A bearing 81 is provided on the inner peripheral surface of the reinforcing ring member 30. Examples of the bearing 81 include a roller bearing and a sliding bearing. A crank pin 71b of a crankshaft 71 (described later) is inserted into the inside of the bearing 81 so as to share a central axis. A groove 31 is formed along the circumferential direction on the inner peripheral surface of the reinforcing ring member 30. A snap ring 82 is fitted into the groove 31. This prevents the bearing 81 from falling off the reinforcing ring member 30.

[0019] The height of the reinforcing ring member 30 shown in Figure 3 is approximately the same as the height of the swivel boss portion 23, but it may be less than the height of the swivel boss portion 23 as long as the range in which the bearing 81 can contact and the range in which the groove 31 can be formed are secured.

[0020] As shown in FIG. 1, the crankshaft 71 has a shaft body 71a and a crank pin 71b. The shaft body 71a is a shaft-shaped member centered on an axis C1. The shaft body 71a is driven to rotate about the axis C1 by an electric motor (not shown). The crank pin 71b is a shaft-shaped member centered on the axis C2, and is formed integrally with the shaft body 71a. The axis C2 is eccentric with respect to the axis C1 by ρ. In other words, the crank pin 71b revolves around the axis C1 as the shaft body 71a is driven to rotate around the axis C1.

[0021] The orbiting scroll member 20, which is connected to the crankshaft 71 (crank pin 71b) via a bearing 81, is configured to perform an orbital movement about the axis C1 by an anti-rotation mechanism.

[0022] An example of the anti-rotation mechanism is a pin-ring mechanism. The pin-ring mechanism has an anti-rotation ring 92 and an anti-rotation pin 93. 3 and 4, the anti-rotation ring 92 is a cylindrical member fitted into a plurality of ring grooves 24 provided in the circumferential direction of the swivel boss portion 23 on the other surface of the swivel-side end plate 21. The anti-rotation ring 92 may be omitted. The anti-rotation pin 93 is a pin-shaped member fixed to the housing 91. The anti-rotation pin 93 slides against the inner circumferential surface of the anti-rotation ring 92.

[0023] The scroll compressor is configured such that the volume of the compression chamber 95 changes as a result of the orbiting scroll member 20 making an orbital motion, thereby compressing the refrigerant taken into the compression chamber 95.

[0024] When the orbiting scroll member 20 revolves, a load from the crank pin 71b acts on the orbiting boss portion 23 via the bearing 81. Specifically, the load from the crank pin 71b refers to a load in the radial direction relative to the axis C2. In this embodiment, the reinforcing ring member 30 bears part of this load, thereby reducing the risk that the resin-made rotation boss portion 23 will be damaged by the load from the crank pin 71b.

[0025] It is preferable to provide the reinforcing ring member 30 with a retaining portion that prevents the reinforcing ring member 30 from falling off from the swivel boss portion 23. The retaining portion here refers to a structure that mechanically fixes the reinforcing ring member 30 to the swivel boss portion 23. However, the retaining portion may also be fixed by welding or adhesive. The following structure is exemplified as a mechanically fixed retaining portion.

[0026] That is, as shown in FIG. 5, the uneven portion 32 formed on the outer circumferential surface of the reinforcing ring member 30 serves as a retaining portion. The resin material injected during the insert molding fills the recesses formed by the uneven portion 32. As a result, the reinforcing ring member 30 is mechanically fixed to the swivel boss portion 23.

[0027] As shown in FIG. 6, a step such as a flange portion 33 formed on the outer circumferential surface of the reinforcing ring member 30 may be used as a retaining portion. The flange portion 33 serves as a protrusion that is hooked onto the swivel boss portion 23. This allows the reinforcing ring member 30 to be mechanically fixed to the swivel boss portion 23.

[0028] As shown in FIG. 7, a sloped portion 34 formed on the outer circumferential surface of the reinforcing ring member 30 may be used as a retaining portion. The diameter of the sloped portion 34 gradually decreases from the swivel-side end plate 21 toward the end of the swivel boss portion 23. This allows the reinforcing ring member 30 to be mechanically fixed to the swivel boss portion 23.

[0029] The reinforcing ring member 30 may be provided on the outer circumferential surface of the swivel boss portion 23. In this case, the bearing 81 is provided on the inner circumferential surface of the swivel boss portion 23.

[0030] This embodiment provides the following advantages. The fixed scroll member 10 and the orbiting scroll member 20 are formed of a resin material, and the reinforcing ring member 30 is formed of a material having a higher strength and a higher elastic modulus than the resin material forming the fixed scroll member 10 and the orbiting scroll member 20, so that the radial load that the resin orbiting boss portion 23 receives from the bearing 81 can be borne by the reinforcing ring member 30. This makes it possible to reduce the risk that the resin orbiting boss portion 23 will be damaged by the load received from the bearing 81.

[0031] In addition, the reinforcing ring member 30 has a retaining portion that prevents it from falling off from the swivel boss portion 23, so the reinforcing ring member 30 can be mechanically fixed to the swivel boss portion 23. This makes it possible to eliminate individual differences in fixing strength compared to when fixing is performed by fusion or adhesion. Here, the retaining portion is, for example, a stepped or inclined portion 34 such as a concave-convex portion 32 or a flange portion 33 formed on the outer circumferential surface or inner circumferential surface of the reinforcing ring member 30 .

[0032] [Second embodiment] A scroll fluid machine according to a second embodiment of the present disclosure will now be described with reference to the drawings. This embodiment differs from the first embodiment in the presence or absence of a tooth base reinforcing member, but the other configurations are similar, so the same components are given the same reference numerals and the description thereof will be omitted.

[0033] As shown in FIG. 8, the orbiting scroll member 20 is provided with a tooth base reinforcing member 40 . The tooth base reinforcing member 40 is a member having a substantially L-shaped cross section formed across the tooth bottom surfaces of the orbiting side wall body 22 and the orbiting side end plate 21. The tooth base reinforcing member 40 has an inner surface that is flush with the orbiting side wall body 22 and the orbiting side end plate 21, or is embedded inwardly of the tooth bottom surfaces of the orbiting side wall body 22 and / or the orbiting side end plate 21. The tooth base reinforcing member 40 may also be provided in the fixed scroll member 10 made of resin.

[0034] Like the reinforcing ring member 30, the tooth base reinforcing member 40 is made of a material having a higher strength and a higher elastic modulus than the resin material forming the orbiting scroll member 20. This allows the tooth base reinforcing member 40 to bear the bending moment applied to the resin orbiting side wall body 22. The bending moment is generated by, for example, the internal pressure of the compression chamber 95 or contact with the fixed scroll member 10.

[0035] The tooth base reinforcing member 40 is provided along the spiral direction at the tooth base of the orbiting scroll member 20. Here, the range in which the tooth base reinforcing member 40 is provided may be the entire range along the spiral direction, or may be a limited range. An example of a limited range is a range of position angle θ (see FIG. 2) of 300° to 660°. In this range, the stress on the tooth base caused by the internal pressure of the compression chamber 95 is large, and by reinforcing this range, the tooth base of the orbiting scroll member 20 can be efficiently reinforced.

[0036] The tooth base reinforcing member 40 may be provided on at least one of the ventral side and the dorsal side of the orbiting side wall body 22. The tooth base reinforcing member 40 shown in Fig. 8 is provided only on the dorsal side. In this case, the orbiting scroll member 20 to which a large load acts from the dorsal side can be efficiently reinforced.

[0037] The height h of the tooth base reinforcing member 40 (the dimension from the tooth bottom along the erection direction of the revolving side wall body 22) is set to 10% to 50% of the tooth height of the revolving side wall body 22. In addition, the width w of the tooth base reinforcing member 40 (the dimension from the revolving side wall body 22 along the inner surface of the tooth bottom) is set to be approximately the same as the height of the tooth base reinforcing member 40. This allows the tooth base reinforcing member 40 to be provided in an area where a large bending moment is likely to occur.

[0038] The tooth base reinforcing member 40 is integrated with the orbiting scroll member 20 when the orbiting scroll member 20 is injection molded. That is, the tooth base reinforcing member 40 is provided in the orbiting scroll member 20 by insert molding.

[0039] It is preferable that the tooth base reinforcing member 40 is provided with a joint portion that is joined to the orbiting scroll member 20. The joint portion here refers to a structure that mechanically fixes the tooth base reinforcing member 40 to the orbiting scroll member 20. However, the joint portion may be fixed by welding or adhesion. The following structure is an example of a mechanically fixed joint.

[0040] That is, as shown in FIG. 9, the uneven portion 41 formed on the outer surface of the tooth base reinforcing member 40 serves as a retaining portion. The resin material injected during the insert molding is filled into the recesses formed by the uneven portions 41. In this way, the tooth base reinforcing member 40 is mechanically joined to the orbiting scroll member 20.

[0041] As shown in FIG. 10, a pin portion 42 formed on the outer surface of a tooth base reinforcing member 40 may serve as a retaining portion. The pin portion 42 serves as a protrusion that is hooked onto the tooth base reinforcing member 40. This results in the tooth base reinforcing member 40 being mechanically fixed to the orbiting scroll member 20.

[0042] As shown in FIG. 11, a lattice portion 43 formed on the outer surface of the tooth base reinforcing member 40 may be used as a retaining portion. The resin material injected during the insert molding fills the gaps formed by the lattice portions 43. As a result, the tooth base reinforcing member 40 is mechanically joined to the orbiting scroll member 20.

[0043] As shown in FIG. 12, a through hole 44 that communicates between the outer surface and the inner surface of the tooth base reinforcing member 40 may be used as a retaining portion. The resin material injected during the insert molding fills the inside of the through-hole 44. As a result, the tooth base reinforcing member 40 is mechanically joined to the orbiting scroll member 20.

[0044] This embodiment provides the following advantages. At the base of the orbiting scroll member 20, a base reinforcing member 40 is provided that is provided along the spiral direction of the orbiting side wall body 22 across the orbiting side end plate 21, and the base reinforcing member 40 is formed of a material that is stronger and has a higher elastic modulus than the resin that forms the fixed scroll member 10 and the orbiting scroll member 20, so that the base reinforcing member 40 can bear the bending moment that is applied to the resin orbiting side wall body 22. This can reduce the risk that the resin orbiting side wall body 22 will be damaged by the bending moment.

[0045] Furthermore, since the tooth base reinforcing member 40 is provided at a position with a position angle of at least 300° or more and 660° or less, the tooth base reinforcing member 40 can be provided in a range where the bending moment caused by the internal pressure of the compression chamber 95 is likely to be large.

[0046] Furthermore, when the tooth base reinforcing member 40 is provided only on the rear side of the orbiting side wall body 22, it can efficiently reinforce the orbiting scroll member 20 on which a large load acts from the rear side.

[0047] Furthermore, since the height of the tooth base reinforcing member 40 from the tooth bottom is set to 10% to 50% of the tooth height, the tooth base reinforcing member 40 can be provided in an area where a large bending moment is likely to occur.

[0048] In addition, since the base reinforcement member 40 has a joint portion that mechanically joins with the orbiting scroll member 20, the base reinforcement member 40 can be mechanically fixed to the orbiting scroll member 20. This makes it possible to eliminate individual differences in fixing strength compared to when the members are fixed by fusion or adhesion. In addition, since the base reinforcement member 40 and the orbiting scroll member 20 can be firmly integrated, the base reinforcement member 40 can reliably bear the load. Here, the joint portion is, for example, a concave-convex portion 41, a pin portion 42, a lattice portion 43, or a through hole 44.

[0049] [Third embodiment] Hereinafter, a scroll fluid machine according to a third embodiment of the present disclosure will be described with reference to the drawings. This embodiment differs from the first embodiment in the presence or absence of the rib 25 and the sliding pad 60, but the other configurations are similar. Therefore, the same configurations are given the same reference numerals and the description thereof will be omitted.

[0050] 13, in the orbiting scroll member 20, a rib 25 is formed between each ring groove 24 and an adjacent ring groove 24 in the circumferential direction. The rib 25 is formed by providing two recesses 26 (depressions) between the ring grooves 24. This can increase the strength of the orbiting side end plate 21.

[0051] 14, a sliding pad 60 may be fitted into this recess 26. The sliding pad 60 is a member that slides against the housing 91 when the orbiting scroll member 20 revolves. This makes it possible to omit parts such as a thrust plate intended to prevent seizure.

[0052] The ring groove 24 and the rib 25 configured as described above may be formed by an end plate reinforcing member 50 provided on the other surface of the swivel-side end plate 21 . 15 and 16, the end plate reinforcing member 50 is a disk-shaped (annular) member provided around the swivel boss portion 23 and on the inside of the swivel-side end plate 21. In this case, a protrusion 23a may be provided on the outer circumferential surface of the swivel boss portion 23. This makes it possible to prevent the end plate reinforcing member 50 from falling off.

[0053] The end plate reinforcing member 50 is formed of a material with a higher elastic modulus and lower friction than the resin forming the fixed scroll member 10 and the orbiting scroll member 20. Examples of materials with a higher elastic modulus and lower friction than the resin material include continuous fiber composite materials that contain resins (such as PEEK and PPS) that have a small friction coefficient and a small wear rate. This reduces deformation of the orbiting end plate 21 and makes it possible to omit parts such as thrust plates intended to prevent seizure.

[0054] This embodiment provides the following advantages. Since ribs 25 are provided between adjacent ring grooves 24, the strength of the orbiting side end plate 21 can be increased by the ribs 25. In addition, since unevenness is inevitably formed by providing the ribs 25, the risk of defects such as sink marks and cracks occurring when the orbiting scroll member 20 is injection molded can be reduced.

[0055] Also, when the sliding pad 60 is provided in the recess 26, parts such as a thrust plate intended to prevent seizure can be omitted.

[0056] In addition, the ring groove 24 and the rib 25 are formed by an end plate reinforcing member 50 provided on the other surface of the orbiting side end plate 21, and the end plate reinforcing member 50 is formed of a material with a higher elastic modulus and lower friction than the resin that forms the fixed scroll member 10 and the orbiting scroll member 20, thereby reducing deformation of the orbiting side end plate 21 and making it possible to omit parts such as thrust plates intended to prevent seizure.

[0057] [Variations] In each of the embodiments described above, the fixed side wall body 12 and the rotating side wall body 22 may be formed in a tapered shape so that the thickness gradually increases from the tooth tip to the tooth base, as shown in Fig. 17. This can increase the strength of the tooth base.

[0058] It should be noted that the above-mentioned embodiments can be realized independently. For example, the reinforcing ring member 30 and the tooth base reinforcing member 40 may be omitted and the orbiting scroll member 20 may be provided with only the end plate reinforcing member 50, or the tooth base reinforcing member 40 may be omitted and the orbiting scroll member 20 may be provided with the reinforcing ring member 30 and the end plate reinforcing member 50.

[0059] The embodiments described above can be understood, for example, as follows. That is, a scroll fluid machine according to one embodiment of the present disclosure comprises a fixed scroll member (10) having a spiral-shaped fixed side wall body (11) erected on one surface of a fixed side end plate (12), a rotating scroll member (20) having a spiral-shaped orbiting side wall body (21) erected on one surface of a orbiting side end plate (22) and defining a compression chamber (95) together with the fixed side wall body and a cylindrical orbiting boss portion (23) formed on the other surface of the orbiting side end plate, a reinforcing ring member (30) provided on the inner or outer peripheral surface of the orbiting boss portion, and a bearing (81) provided on the inner peripheral side of the reinforcing ring member or the inner peripheral side of the orbiting boss portion and into which a crankshaft (71) is inserted, wherein the fixed scroll member and the orbiting scroll member are formed of a resin material, and the reinforcing ring member is formed of a material having a higher strength and a higher elastic modulus than the resin material forming the fixed scroll member and the orbiting scroll member.

[0060] In the scroll fluid machine according to the present aspect, the fixed scroll member and the scroll member are made of a resin material, and the reinforcing ring member is made of a material having a higher strength and a higher elastic modulus than the resin material used to form the fixed scroll member and the scroll member, so that the reinforcing ring member can bear the radial load that the resin orbiting boss receives from the bearing, thereby reducing the risk that the resin orbiting boss will be damaged by the load from the bearing. Examples of the resin material include resins such as super engineering plastics, short fiber composite materials, and the like. Examples of materials that have higher strength and elastic modulus than resin materials include continuous fiber unidirectional (UD) materials, long fiber materials, aluminum materials, iron, titanium, etc.

[0061] In the scroll fluid machine according to the embodiment of the present disclosure, the fixed scroll member is made of a resin material.

[0062] According to the scroll fluid machine of this aspect, since the fixed scroll member is made of a resin material, the weight of the fixed scroll can be reduced.

[0063] In the scroll compressor according to an aspect of the present disclosure, the reinforcing ring member has a retaining portion that prevents the reinforcing ring member from falling off the orbiting boss portion.

[0064] In the scroll fluid machine according to the present aspect, the reinforcing ring member has a retaining portion that prevents the reinforcing ring member from falling off the boss portion, so that the reinforcing ring member can be mechanically fixed to the boss portion, which makes it possible to eliminate individual differences in fixing strength compared to when the reinforcing ring member is fixed by fusion or adhesion.

[0065] In addition, in a scroll compressor according to one embodiment of the present disclosure, the anti-pullout portion is an irregularity (32), a step (33), or a gradient (34) formed on the outer peripheral surface or the inner peripheral surface of the reinforcing ring member.

[0066] According to the scroll fluid machine of the present embodiment, the anti-slip portion is an unevenness, step or gradient formed on the outer or inner peripheral surface of the reinforcing ring member, so that the reinforcing ring member can be fixed to the rotating boss portion by a mechanical structure.

[0067] In addition, the scroll compressor according to one embodiment of the present disclosure includes a tooth base reinforcing member (40) that is provided at the tooth base of the orbiting scroll member, extending from the orbiting side wall body to the orbiting side end plate and aligned along the spiral direction of the orbiting side wall body, and the tooth base reinforcing member is formed of a material that is stronger and has a higher elastic modulus than the resin that forms the fixed scroll member and the orbiting scroll member.

[0068] According to the scroll fluid machine of this aspect, a tooth root reinforcing member is provided at the tooth root of the orbiting scroll member, extending from the orbiting side wall body and the orbiting side end plate along the spiral direction of the orbiting side wall body, and the tooth root reinforcing member is made of a material having a higher strength and a higher elasticity than the fixed scroll member and the resin forming the scroll member, so that the tooth root reinforcing member can bear the bending moment applied to the resin orbiting side wall body. This reduces the risk that the resin orbiting side wall body will be damaged by the bending moment. The bending moment is generated, for example, by the internal pressure of the compression chamber or by contact with the fixed scroll member.

[0069] In addition, a scroll compressor according to one embodiment of the present disclosure includes another tooth root reinforcing member at the tooth root of the fixed scroll member, the tooth root reinforcing member being arranged along the spiral direction of the fixed side wall body across the fixed side wall body and the fixed side end plate, and the tooth root reinforcing member is formed of a material having a higher strength and a higher elastic modulus than the resin forming the fixed scroll member.

[0070] According to the scroll fluid machine of this aspect, a tooth root reinforcing member is provided at the tooth root of the fixed scroll member, extending from the fixed side wall body and the fixed side end plate along the spiral direction of the fixed side wall body, and the tooth root reinforcing member is made of a material having a higher strength and a higher elastic modulus than the resin forming the fixed scroll member, so that the tooth root reinforcing member can bear the bending moment applied to the resin fixed side wall body. This reduces the risk that the resin fixed side wall body will be damaged by the bending moment. The bending moment is generated, for example, by the internal pressure of the compression chamber or by contact with the orbiting scroll member.

[0071] In the scroll compressor according to an embodiment of the present disclosure, the tooth root reinforcing member is provided at a position that is at least equal to or greater than 300° and equal to or less than 660° in terms of position angle.

[0072] According to the scroll fluid machine of the present embodiment, the tooth base reinforcement member is provided at a position with a position angle of at least 300° and not exceeding 660°, so that the tooth base reinforcement member can be provided in a range where the bending moment caused by the internal pressure of the compression chamber is likely to be large.

[0073] In the scroll compressor according to an aspect of the present disclosure, the tooth base reinforcing member is provided only on the rear side of the orbiting side wall body.

[0074] According to the scroll fluid machine of this embodiment, the tooth root reinforcing member is provided only on the back side of the orbiting side wall body, so that the orbiting scroll member to which a large load acts from the back side can be efficiently reinforced.

[0075] In the scroll compressor according to an aspect of the present disclosure, the tooth base reinforcing member has a height from the tooth bottom that is 10% to 50% of the tooth height.

[0076] According to the scroll fluid machine of this embodiment, the height of the tooth base reinforcing member from the tooth bottom is between 10% and 50% of the tooth height, so that the tooth base reinforcing member can be provided in an area where a large bending moment is likely to occur.

[0077] In the scroll compressor according to an aspect of the present disclosure, the tooth base reinforcing member has a joint portion that is mechanically joined to the orbiting scroll member.

[0078] According to the scroll fluid machine of this aspect, the tooth base reinforcing member has a joint portion that is mechanically joined to the orbiting scroll member, so that the tooth base reinforcing member can be mechanically fixed to the orbiting scroll member. Therefore, compared to fixing by fusion or adhesion, individual differences in fixing strength can be eliminated. In addition, since the tooth base reinforcing member and the orbiting scroll member can be firmly integrated, the tooth base reinforcing member can reliably bear the load.

[0079] In the scroll compressor according to an aspect of the present disclosure, the joint is formed as an uneven portion (41), a pin (42), a lattice structure (43), or a through hole (44).

[0080] According to the scroll fluid machine of this aspect, the joint portion is formed as unevenness, a pin, a lattice structure or a through hole, so that the tooth base reinforcing member can be fixed to the orbiting scroll member by a mechanical structure.

[0081] In addition, in a scroll compressor according to one embodiment of the present disclosure, a plurality of ring grooves (24) are provided on the other surface of the orbiting side end plate in the circumferential direction of the orbiting side end plate, into which anti-rotation rings (92) are fitted that are inscribed with pin members (93) that prevent the orbiting scroll member from rotating about its axis, and ribs (25) are provided between the ring grooves and the adjacent ring grooves.

[0082] According to the scroll fluid machine of this aspect, the other surface of the orbiting end plate is provided with a plurality of ring grooves in the circumferential direction of the orbiting end plate, into which anti-rotation rings are fitted that inscribe the pin members for preventing the orbiting scroll member from rotating, and ribs are provided between the ring grooves and the adjacent ring grooves, so that the strength of the orbiting end plate can be increased by the ribs. Also, since the provision of the ribs inevitably results in unevenness, the risk of defects such as sink marks and cracks occurring during injection molding of the orbiting scroll member can be reduced.

[0083] The scroll compressor according to one aspect of the present disclosure also includes a sliding pad (60) fitted in a recess (26) formed by the ring groove, the adjacent ring groove, and the rib.

[0084] According to the scroll fluid machine of the present embodiment, a sliding pad is fitted into a recess formed by a ring groove and an adjacent ring groove and a rib, so that parts intended to prevent seizure, such as a thrust plate, can be omitted.

[0085] In addition, in a scroll compressor according to one embodiment of the present disclosure, the ring groove and the rib are formed by an end plate reinforcing member (50) provided on the other surface of the orbiting side end plate, and the end plate reinforcing member is formed of a material having a higher elastic modulus and lower friction than the resin forming the fixed scroll member and the orbiting scroll member.

[0086] In the scroll fluid machine of this embodiment, the ring groove and rib are formed by an end plate reinforcing member provided on the other side of the orbiting side end plate, and the end plate reinforcing member is formed of a material with a higher elastic modulus and lower friction than the resin that forms the fixed scroll member and the scroll member, thereby reducing deformation of the orbiting side end plate and making it possible to omit parts such as thrust plates intended to prevent seizure. Examples of materials with a higher elastic modulus and lower friction than resin materials include continuous fiber composite materials that contain resins with low friction coefficients and low wear rates (such as PEEK and PPS).

[0087] In the scroll compressor according to an aspect of the present disclosure, the fixed side wall body and the orbiting side wall body have thicknesses that gradually increase from the tooth tip to the tooth base.

[0088] According to the scroll fluid machine of this embodiment, the fixed side wall and the orbiting side wall have a gradually increasing thickness from the tooth tip to the tooth base, thereby increasing the strength of the tooth base where a large bending moment is likely to occur. [Explanation of symbols]

[0089] 10 Fixed scroll member 11 Fixed side end plate 12 Fixed side wall 20 Rotating scroll member 21 Swivel side end plate 22 Swivel side wall 23 Swivel boss section 23a protrusion 24 Ring groove 25 Ribs 26 Recess 30 Reinforcement ring member 31 Groove 32 Uneven part 33 Flange section 34 Gradient section 40 Tooth base reinforcement member 41 Uneven part 42 Pin section 43 Igetabe 44 Through Hole 50 End plate reinforcement member 60 Sliding Pad 71 Crankshaft 71a Shaft body 71b Crank pin 81 Bearings 82 Snap ring 91 Housing 92 Anti-rotation ring 93 Anti-rotation pin 95 Compression Chamber

Claims

1. a fixed scroll member having a spiral-shaped fixed side wall body standing on one surface of a fixed side end plate; an orbiting scroll member having a spiral-shaped orbiting side wall body that defines a compression chamber together with the fixed side wall body and is provided on one surface of an orbiting side end plate, and a cylindrical orbiting boss portion is formed on the other surface of the orbiting side end plate; a reinforcing ring member provided on an inner circumferential surface or an outer circumferential surface of the swivel boss portion; a bearing provided on an inner peripheral side of the reinforcing ring member or an inner peripheral side of the swivel boss portion, into which the crankshaft is inserted; Equipped with The orbiting scroll member is made of a resin material, the reinforcing ring member is formed of a material having a higher strength and a higher elastic modulus than a resin material forming the orbiting scroll member, A plurality of ring grooves are provided in the other surface of the orbiting side end plate in a circumferential direction of the orbiting side end plate, into which anti-rotation rings are fitted and which inscribe a pin member for preventing the orbiting scroll member from rotating, A rib is provided between the ring groove and the adjacent ring groove, the ring groove and the rib are formed by an end plate reinforcing member provided on the other surface of the swivel-side end plate, The end plate reinforcing member is made of a material having a higher elastic modulus and lower friction than a resin material forming the fixed scroll member and the orbiting scroll member.

2. 2. The scroll fluid machine according to claim 1, wherein the fixed scroll member is made of a resin material.

3. 3. The scroll fluid machine according to claim 1, wherein the reinforcing ring member has a retaining portion for preventing the reinforcing ring member from coming off the orbiting boss portion.

4. 4. The scroll fluid machine according to claim 3, wherein the retaining portion is an uneven portion, a step, or a gradient formed on an outer circumferential surface or an inner circumferential surface of the reinforcing ring member.

5. a tooth base reinforcing member provided at a tooth base of the orbiting scroll member so as to extend along a spiral direction of the orbiting side wall body across the orbiting side end plate, 5. The scroll fluid machine according to claim 1, wherein the tooth root reinforcing member is made of a material having a higher strength and a higher elastic modulus than a resin material from which the orbiting scroll member is made.

6. a tooth base reinforcing member provided at the tooth base of the fixed scroll member so as to extend along the spiral direction of the fixed side wall body across the fixed side wall body and the fixed side end plate, 6. The scroll fluid machine according to claim 1, wherein the tooth base reinforcing member is made of a material having a higher strength and a higher elastic modulus than a resin material that forms the fixed scroll member.

7. 7. The scroll fluid machine according to claim 5, wherein the tooth root reinforcing member is provided at a position that is at least 300[deg.] or more and 660[deg.] or less in terms of a position angle.

8. 8. The scroll fluid machine according to claim 5, wherein the tooth root reinforcing member is provided only on a rear side of the orbiting side wall body.

9. 9. The scroll fluid machine according to claim 5, wherein the height of the tooth root reinforcing member from the tooth bottom is 10% to 50% of the tooth height.

10. 10. The scroll fluid machine according to claim 5, wherein the tooth base reinforcing member has a joint portion that is mechanically joined to the orbiting scroll member.

11. The scroll fluid machine according to claim 10, wherein the joint portion is formed as a projection or recess, a pin, a lattice structure, or a through hole.

12. 12. The scroll fluid machine according to claim 1, further comprising a sliding pad fitted in a recess formed by the ring groove, the adjacent ring groove and the rib.

13. 13. The scroll fluid machine according to claim 1, wherein the fixed side wall and the orbiting side wall have thicknesses that gradually increase from the tooth tip to the tooth base.

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