Double rotary scroll compressor

Abstract

This invention provides a dual-rotary scroll compressor with excellent durability and quiet operation. In the compressor of this invention, a protrusion (64) and a limiting body (81) are provided within the scroll chamber (65). The protrusion (64) is formed separately from the housing (6) and is installed with a gap between it and the housing (6). The limiting body (81) limits the relative rotation of the protrusion (64) relative to the housing (6). Furthermore, a drive scroll (30) is rotatably supported on the protrusion (64) about a drive axis (O1), and a driven scroll (40) is rotatably supported on the driven axis (O2). The limiting body (81) has a shaft member (81a) that passes through the protrusion (64) and the housing (6), and a support member (81b) provided on the outer peripheral surface of the shaft member (81a). The support member (81b) elastically deforms between a specific member, which is one of the protrusion (64) and the housing (6), and the shaft member (81a) and supports the shaft member (81a).

Description

Technical Field

[0001] This invention relates to a dual rotary scroll compressor. Background Technology

[0002] Patent Document 1 discloses a conventional dual-rotary scroll compressor (hereinafter, appropriately referred to as a compressor). This compressor includes a housing, a drive scroll, a driven scroll, a drive mechanism, and a driven mechanism. The housing has a scroll chamber that houses the drive mechanism, the drive scroll, and the driven scroll. Fluid is drawn into the scroll chamber from outside the housing. In this document, the fluid is specifically a refrigerant.

[0003] The drive mechanism has a stator and a rotor. The stator is cylindrical and its outer periphery is fixed to a housing. The rotor is disposed on the inner periphery of the stator. The drive scroll has a cylindrical extension. The rotor is fixed to the outer periphery of the extension. Thus, the drive scroll can be driven to rotate about a drive axis under the action of the rotor's rotation. The driven scroll is eccentric relative to the drive scroll and rotates passively about a driven axis under the action of the drive scroll and the driven mechanism. These drive scrolls and driven scrolls form a compression chamber that compresses the fluid by performing driven and driven rotations.

[0004] Furthermore, in this compressor, a protrusion is integrally formed on the housing. The protrusion is formed into a generally cylindrical shape with a constant outer diameter and extends into the scroll chamber towards the drive scroll and the driven scroll in the direction of the drive shaft. The protrusion enters the interior of the extension and is rotatably supported in the extension via a bearing, thereby driving the scroll. Additionally, a fluid passage extending in the direction of the drive shaft is formed inside the protrusion. One side of the fluid passage in the direction of the drive shaft communicates with the compression chamber, and the other side communicates with the outside of the housing.

[0005] In this compressor, fluid in the scroll chamber is drawn into the compression chamber and compressed therein. The compressed fluid then flows through the fluid passage and is discharged to the outside of the casing, i.e., the outside of the compressor.

[0006] Existing technical documents

[0007] Patent documents

[0008] Patent Document 1: Japanese Patent Application Publication No. 2-227575 Summary of the Invention

[0009] The problem that the invention aims to solve

[0010] In the aforementioned conventional compressors, the drive scroll has an extension that is rotatably supported by a protrusion. Therefore, in this compressor, the protrusion becomes hot during operation due to friction with the rotating extension.

[0011] In addition, in this compressor, the extension is rotatably supported on the protrusion, so that the vibration generated by the drive scroll during operation is transmitted to the protrusion through the extension.

[0012] In this compressor, the protrusion is integrally formed into the housing. Therefore, if the protrusion becomes hot as described above, its heat can easily be transferred to the entire housing. Consequently, there is a concern about reduced housing durability due to heat in this compressor. Furthermore, because the protrusion is integrally formed into the housing, vibrations can easily be transmitted from the protrusion to the entire housing, causing vibrations within the inner housing, including the protrusion, during operation. As a result, quietness is compromised in this compressor.

[0013] The present invention was made in view of the above-mentioned prior practices, and the problem to be solved is to provide a dual rotary scroll compressor with excellent durability and quiet operation.

[0014] Solution for solving the problem

[0015] The first dual-rotary scroll compressor of the present invention comprises a housing, a drive scroll, a driven scroll, a drive mechanism, and a driven mechanism.

[0016] The housing has a scroll chamber that houses the driving scroll, the driven scroll, and the driving mechanism.

[0017] The drive mechanism has a stator and a rotor that is driven to rotate under the action of the stator.

[0018] The drive vortex is driven to rotate around the drive shaft under the action of the drive mechanism.

[0019] The driven scroll is eccentric relative to the driving scroll and rotates passively around the driven axis under the action of the driving scroll and the driven mechanism.

[0020] The driving scroll and the driven scroll form a compression chamber that compresses the fluid under the action of the driving rotation and the driven rotation.

[0021] The dual rotary scroll compressor is characterized in that...

[0022] The vortex chamber is equipped with:

[0023] A protrusion, which is separately formed from the housing and mounted with a gap between it and the housing, extends toward the drive volute and the driven volute along the drive axis; and

[0024] A limiting body that restricts the relative rotation of the protrusion relative to the housing.

[0025] The drive scroll is rotatably supported on the protrusion about the drive shaft.

[0026] The driven scroll is rotatably supported on the protrusion about the driven axis.

[0027] The limiting body has:

[0028] A shaft member, which is inserted into the protrusion and the housing; and

[0029] A support member is disposed on the outer peripheral surface of the shaft member.

[0030] The support member elastically deforms between a specific member, which is one of the protrusion and the housing, and the shaft member, and supports the shaft member.

[0031] In the first dual-rotary scroll compressor of the present invention, a protrusion is provided in the scroll chamber, which rotatably supports a drive scroll about a drive shaft and a driven scroll about a driven shaft. Therefore, the protrusion inevitably generates heat during operation due to friction with the rotating drive and driven scrolls. Furthermore, vibrations generated in the drive and driven scrolls during operation are also transmitted to the protrusion.

[0032] In this compressor, the protrusion is formed separately from the housing, and is mounted to the housing with a gap between them. Therefore, compared to a case where the protrusion is integrally formed with the housing, heat from the protrusion is less likely to transfer to the housing in this compressor. Consequently, the housing is less likely to become hot. Furthermore, in this compressor, vibrations transmitted from the drive mechanism, drive scroll, and driven scroll to the protrusion are also less likely to be transmitted from the protrusion to the housing. Therefore, housing vibration during operation can be appropriately suppressed in this compressor.

[0033] Furthermore, in this compressor, even if the protrusion is installed in the housing with a gap between it and the housing, the relative rotation of the protrusion relative to the housing is restricted by the action of the limiting body. Here, the limiting body has a shaft member and a support member. The shaft member is inserted through both the protrusion and the housing. That is, in this compressor, the limiting body connects the protrusion and the housing via the shaft member inserted through both the protrusion and the housing, thereby restricting the relative rotation of the protrusion relative to the housing. Additionally, in this limiting body, the support member is provided on the outer circumferential surface of the shaft member. Furthermore, the support member elastically deforms between a specific member, which is either the protrusion or the housing, and the shaft member, and supports the shaft member. Thus, in this compressor, the transmission of vibration from the protrusion to the housing through the shaft member and then the limiting body can be appropriately suppressed. Regarding this point, in this compressor, housing vibration during operation can also be appropriately suppressed.

[0034] Therefore, the first dual-rotary scroll compressor of the present invention has excellent durability and quiet operation.

[0035] The second dual-rotary scroll compressor of the present invention comprises a housing, a drive scroll, a driven scroll, a drive mechanism, and a driven mechanism.

[0036] The housing has a scroll chamber that houses the driving scroll, the driven scroll, and the driving mechanism.

[0037] The drive mechanism has a stator and a rotor that covers the stator from the outside and is driven to rotate under the action of the stator.

[0038] The drive vortex is driven to rotate around the drive shaft under the action of the drive mechanism.

[0039] The driven scroll is eccentric relative to the driving scroll and rotates passively around the driven axis under the action of the driving scroll and the driven mechanism.

[0040] The driving scroll and the driven scroll form a compression chamber that compresses the fluid under the action of the driving rotation and the driven rotation.

[0041] The dual rotary scroll compressor is characterized in that...

[0042] The vortex chamber is equipped with:

[0043] A protrusion, which is separately formed from the housing and mounted with a gap between it and the housing, extends toward the drive volute and the driven volute along the drive axis; and

[0044] A limiting body that restricts the relative rotation of the protrusion relative to the housing.

[0045] The stator is mounted on the protrusion.

[0046] The drive scroll is rotatably supported on the protrusion about the drive shaft.

[0047] The driven scroll is rotatably supported on the protrusion about the driven axis.

[0048] The limiting body has:

[0049] A shaft member, which is inserted into the housing and the stator; and

[0050] A support member is disposed on the outer peripheral surface of the shaft member.

[0051] The support member elastically deforms between a specific member, which is one of the housing and the stator, and the shaft member, and supports the shaft member.

[0052] In the second dual-rotary scroll compressor of the present invention, in addition to the drive scroll and the driven scroll being rotatably supported relative to the protrusion, a stator is also mounted on the protrusion. Therefore, in this compressor, not only does the protrusion generate heat during operation due to friction with the rotating drive scroll and the driven scroll, but the heat generated in the drive mechanism during operation is also inevitably transferred to the protrusion.

[0053] In addition, in this compressor, in addition to transmitting the vibrations generated in the drive scroll and driven scroll during operation, the vibrations generated in the drive mechanism during operation are also transmitted relative to the protrusion.

[0054] At this point, regarding the compressor, similarly to the compressor of the first invention described above, the heat of the protrusion is difficult to transfer to the housing, and the vibrations transmitted from the drive mechanism, drive scroll, and driven scroll to the protrusion are also difficult to transfer from the protrusion to the housing.

[0055] Furthermore, in this compressor, the stator is mounted on the protruding body. Additionally, the shaft member of the limiting body is inserted into both the housing and the stator. Thus, in this compressor, the limiting body connects the housing and the stator via the shaft member, thereby limiting the relative rotation of the protruding body relative to the housing. Moreover, within the limiting body, a support member elastically deforms between a specific member (one of the housing or stator) and the shaft member, and supports the shaft member. In this way, in this compressor, the transmission of vibration from the protruding body to the housing via the limiting body can also be appropriately suppressed.

[0056] Therefore, the second dual-rotary scroll compressor of the present invention has excellent durability and quiet operation.

[0057] The third dual-rotary scroll compressor of the present invention comprises a housing, a drive scroll, a driven scroll, a drive mechanism, and a driven mechanism.

[0058] The housing has a scroll chamber that houses the driving scroll, the driven scroll, and the driving mechanism.

[0059] The drive mechanism has a stator and a rotor that is driven to rotate under the action of the stator.

[0060] The drive vortex is driven to rotate around the drive shaft under the action of the drive mechanism.

[0061] The driven scroll is eccentric relative to the driving scroll and rotates passively around the driven axis under the action of the driving scroll and the driven mechanism.

[0062] The driving scroll and the driven scroll form a compression chamber that compresses the fluid under the action of the driving rotation and the driven rotation.

[0063] The dual rotary scroll compressor is characterized in that...

[0064] The vortex chamber is equipped with:

[0065] A protrusion, which is separately formed from the housing and mounted with a gap between it and the housing, extends toward the drive volute and the driven volute along the drive axis; and

[0066] A limiting body that restricts the relative rotation of the protrusion relative to the housing.

[0067] The drive scroll is rotatably supported on the protrusion about the drive shaft.

[0068] The driven scroll is rotatably supported on the protrusion about the driven axis.

[0069] The limiting body has:

[0070] A shaft member, which is inserted into the housing, the protrusion, and the stator; and

[0071] A support member is disposed on the outer peripheral surface of the shaft member.

[0072] The support member elastically deforms between a specific component, which is any one of the housing, the protrusion, and the stator, and the shaft member, and supports the shaft member.

[0073] The third dual-rotary scroll compressor of the present invention is similar to the compressors of the first and second inventions described above. The heat of the protrusion is difficult to transfer to the housing. In addition, the vibrations transmitted from the drive mechanism, the drive scroll, and the driven scroll to the protrusion are also difficult to transfer from the protrusion to the housing.

[0074] Furthermore, in this compressor, the shaft member of the limiting body is inserted into the housing, the protrusion, and the stator. Thus, in this compressor, the limiting body connects the housing, the protrusion, and the stator via the shaft member, thereby limiting the relative rotation of the protrusion relative to the housing. Moreover, within the limiting body, a support member elastically deforms between a specific member of the housing, the protrusion, or the stator and the shaft member, and supports the shaft member. In this way, in this compressor, the transmission of vibration from the protrusion to the housing via the limiting body can also be appropriately suppressed.

[0075] Therefore, the third dual-rotary scroll compressor of the present invention exhibits excellent durability and quiet operation.

[0076] In the first to third compressors of the present invention, the housing, protrusion, and stator may be made of metal. A specific component may have a mounting hole through which a limiting body is inserted. The shaft component may have a main body through which a support component is inserted and a metal abutment portion disposed in the main body and located within the mounting hole through the limiting body. Alternatively, the support component may be elastically deformed through the limiting body in the mounting hole and located within the mounting hole, abutting against the inner circumferential surface of the mounting hole. Furthermore, preferably, the abutment portion separates from the inner circumferential surface when the load acting on the protrusion is less than a predetermined set value, and abuts against the inner circumferential surface when a load greater than the predetermined value acts on the protrusion.

[0077] Therefore, in this compressor, when the load acting on the protrusion is less than a set value, the abutment portion separates from the inner circumferential surface of the mounting hole, thus preventing contact between the specific component and the abutment portion. This appropriately suppresses the transmission of vibration from the protrusion to the housing via the shaft member. On the other hand, when a load exceeding the set value acts on the protrusion, the abutment portion abuts against the inner circumferential surface of the mounting hole. Thus, when a load exceeding the set value acts on the protrusion, by bringing the specific component into metal-to-metal contact with the abutment portion, the protrusion can be securely supported by the restraining body.

[0078] It is possible that the outer diameter of the main body is formed to a first length that is shorter than the inner diameter of the mounting hole. It is also possible that the outer diameter of the abutment portion is formed to a second length that is longer than the first length and shorter than the inner diameter of the mounting hole. Furthermore, it is preferable that the outer diameter of the support member is formed to a third length that is longer than the second length. In this case, regarding the abutment portion, when the load acting on the protrusion is less than a set value, the abutment portion can be appropriately separated from the inner circumferential surface of the mounting hole; on the other hand, when a load greater than the set value is applied to the protrusion, the abutment portion can be appropriately made into metal-to-metal contact with the specific member.

[0079] It can be an elastic body that is elastically deformable and supports the protrusion between the protrusion and the housing. Preferably, the limiting body is located in a position closer to the compression chamber than at least a portion of the elastic body in the direction of the drive shaft.

[0080] In this case, the transmission of vibration from the protrusion to the housing can also be suppressed using the elastomer, thus more appropriately suppressing housing vibration during operation. Furthermore, by positioning the restraining body closer to the compression chamber than at least a portion of the elastomer in the drive shaft direction, the restraining body can properly support the protrusion when a load exceeding a set value is applied to it.

[0081] Preferably, the protrusion is made of steel. Therefore, in this compressor, compared to cases where the protrusion is made of resin or aluminum alloy, the heat resistance of the protrusion can be improved. Consequently, in this compressor, the reduction in the durability of the protrusion caused by heat can also be appropriately suppressed.

[0082] Invention Effects

[0083] The first to third dual rotary scroll compressors of the present invention have excellent durability and quiet operation. Attached Figure Description

[0084] Figure 1 This is a cross-sectional view of the compressor in Example 1.

[0085] Figure 2 The compressor relates to Embodiment 1, and is shown in an enlarged cross-sectional view of the main parts, including the protrusion, retaining part, elastic body, and limiting body.

[0086] Figure 3 The compressor relates to Embodiment 1, and is shown in an enlarged cross-sectional view of the main parts, including the protrusion and the limiting body.

[0087] Figure 4 The compressor relates to Embodiment 1, and is shown in an enlarged cross-sectional view of the main parts of the protrusion and the limiting body when a load above a set value is applied to the protrusion.

[0088] Figure 5 The compressor relates to Embodiment 2, and is shown in an enlarged cross-sectional view of the main parts, including the protrusion, retaining part, elastic body, and limiting body.

[0089] Figure 6 The compressor relates to Embodiment 3, and is shown in an enlarged cross-sectional view of the main parts, including the protrusion, retaining part, elastic body, and limiting body.

[0090] Explanation of reference numerals in the attached figures

[0091] 6. Shell

[0092] 10. Electric motor (drive mechanism)

[0093] 11 Rotors

[0094] 12 Compression Chamber

[0095] 17 Stator

[0096] 17f mounting holes

[0097] 20 Driven Mechanism

[0098] 30 Drive Scroll

[0099] 40 Driven Scroll

[0100] 64 protruding body

[0101] 65 vortex chamber

[0102] 70 One-sided elastomer (elastic body)

[0103] 81~83 First~Third Restricted Body

[0104] 81a~83a First~Third Shaft Members (Shaft Members)

[0105] 81b~83b First~Third Support Members (Support Members)

[0106] 610c mounting holes

[0107] 641 mounting holes

[0108] Main body sections 811, 821, and 831

[0109] 813, 823, 833 contact part

[0110] L1 First Length

[0111] L2 Second Length

[0112] L3 Third Length

[0113] O1 drive shaft

[0114] O2 driven axis. Detailed Implementation

[0115] Hereinafter, embodiments 1 to 3 embodying the present invention will be described with reference to the accompanying drawings. The compressors of embodiments 1 to 3 are mounted in a vehicle (not shown) and constitute the vehicle's air conditioning system.

[0116] (Example 1)

[0117] like Figure 1 As shown, the compressor in this embodiment includes a housing 6, an electric motor 10, a drive scroll 30, a driven scroll 40, and a driven mechanism 20. The electric motor 10 is an example of the "drive mechanism" in this invention.

[0118] In this embodiment, using Figure 1 The solid arrows shown indicate the compressor's forward / backward and up / down directions. The forward / backward and up / down directions are orthogonal to each other. Furthermore, in... Figure 2 In the future, with Figure 1 Correspondingly, the compressor's front-to-back and up-to-down directions are specified. It should be noted that these front-to-back directions are just examples for illustrative purposes; the compressor can appropriately change its posture depending on the vehicle it is mounted on.

[0119] like Figure 1As shown, the housing 6 is composed of a housing body 60, a first housing cover 61, and a second housing cover 62. These housing bodies 60, first housing cover 61, and second housing cover 62 are made of aluminum alloy. It should be noted that the housing body 60, first housing cover 61, and second housing cover 62 can also be formed using steel or the like.

[0120] The housing body 60 is cylindrical with the drive shaft O1 as its center, and has openings at both its front and rear ends. The drive shaft O1 is parallel to the front-rear direction. Additionally, a suction port 68 is formed in the housing body 60. The suction port 68 extends radially along the housing body 60. The suction port 68 is connected to the evaporator (not shown) via piping (not shown).

[0121] The first housing cover 61 is located at the rear end of the housing body 60. The first housing cover 61 has a cover body portion 61a and a retaining portion 61b. The cover body portion 61a is generally disk-shaped about the drive shaft O1 and extends radially along the housing 6. The cover body portion 61a has a front surface 610a facing forward and a rear surface 610b located on the opposite side of the front surface 610a and facing rearward.

[0122] The retaining portion 61b is integrally formed on the cover body portion 61a. The retaining portion 61b extends in a cylindrical shape from the front surface 610a of the cover body portion 61a in the direction of the drive axis O1. The retaining portion 61b is composed of a base end portion 615 and a head end portion 616.

[0123] like Figure 2 As shown, the base portion 615 constitutes the rear end portion of the retaining portion 61b and is connected to the cover body portion 61a. The head portion 616 is connected to the base portion 615 and extends forward from the base portion 615. The head portion 616 is formed into a cylinder with a diameter smaller than that of the base portion 615.

[0124] Three retaining grooves 611-613 are formed in the retaining portion 61b. More specifically, each retaining groove 611-613 is recessed into the outer peripheral surface 616a of the head end portion 616 and is annular around the outer peripheral surface 616a. The retaining grooves 611-613 are arranged in the order of retaining groove 611, retaining groove 612, and retaining groove 613 from the rear side to the front side of the head end portion 616. In addition, these retaining grooves 611-613 are arranged at equal intervals in the direction of the drive shaft O1.

[0125] Additionally, a fixing hole 617 is formed at the head end 616. For example... Figure 3As shown, the fixing hole 617 extends along the drive shaft O1 direction inside the head end portion 616 and opens at the front end face 616b of the head end portion 616. Here, the fixing hole 617 does not penetrate the head end portion 616, i.e., the holding portion 61b, along the drive shaft O1 direction.

[0126] like Figure 2 As shown, a side elastic body 70 is provided at the head end portion 616. The side elastic body 70 is an example of an "elastic body" in this invention. The side elastic body 70 is composed of a first elastic body 70a, a second elastic body 70b, and a third elastic body 70c.

[0127] These first to third elastomers 70a to 70c are formed from resins capable of elastic deformation, such as synthetic rubber. Furthermore, each of these first to third elastomers 70a to 70c is independent. These first to third elastomers 70a to 70c are formed into annular shapes with the same outer diameter. It should be noted that the first to third elastomers 70a to 70c, i.e., one-sided elastomers 70, can also be formed from metals or the like, which have lower rigidity than the first housing cover 61.

[0128] The first elastic body 70a is housed in the retaining groove 611. The second elastic body 70b is housed in the retaining groove 612. The third elastic body 70c is housed in the retaining groove 613. Thus, the first to third elastic bodies 70a to 70c, i.e., one side elastic body 70, are mounted on the head end portion 616. In addition, in the head end portion 616, the third elastic body 70c is positioned forward of the first elastic body 70a and the second elastic body 70b in the direction of the drive shaft O1.

[0129] like Figure 2 As shown, a protrusion 64 is mounted on the first housing cover 61. The protrusion 64 is made of steel. The protrusion 64 is composed of a first diameter portion 64a and a second diameter portion 64b. The first diameter portion 64a constitutes the front portion of the protrusion 64. A pin hole 4 is formed in the first diameter portion 64a. The pin hole 4 extends along the drive shaft center O1 inside the first diameter portion 64a and opens at the front end face of the first diameter portion 64a.

[0130] Furthermore, a first radial ball bearing 51 is provided on the outer peripheral surface of the first diameter portion 64a. Although detailed illustrations are omitted, the first radial ball bearing 51 is clearance-fitted onto the outer peripheral surface of the first diameter portion 64a. It should be noted that a sliding bearing may also be provided on the outer peripheral surface of the first diameter portion 64a instead of the first radial ball bearing 51.

[0131] The second diameter portion 64b is integral with the first diameter portion 64a at its front end. Thus, the second diameter portion 64b constitutes the rear portion of the protrusion 64. The second diameter portion 64b is formed as a bottomed cylindrical shape with an outer diameter larger than that of the first diameter portion 64a and an opening at the rear. Here, the inner diameter of the second diameter portion 64b is formed to be a diameter larger than the outer diameter of the head portion 616 of the retaining portion 61b, and slightly smaller than the outer diameter of one side elastic body 70, i.e., the outer diameter of the first to third elastic bodies 70a to 70c.

[0132] In addition, such as Figure 3 As shown, a mounting hole 641 is formed in the second diameter portion 64b. More specifically, the mounting hole 641 is formed in the second diameter portion 64b at a position coaxial with the fixing hole 617. The mounting hole 641 is formed in a cylindrical shape and passes through the second diameter portion 64b along the direction of the drive shaft center O1. More specifically, the inner diameter of the mounting hole 641 is formed to a length that is longer than the first length L1 and the second length L2 and slightly shorter than the third length L3. By forming the mounting hole 641 in the second diameter portion 64b in this way, the protrusion 64 becomes a "specific component" in this invention in the compressor.

[0133] like Figure 2 As shown, the protrusion 64 allows the head portion 616 and the one-sided elastic body 70 to enter the interior of the second diameter portion 64b. Thus, the head portion 616 is disposed inside the second diameter portion 64b. Furthermore, as described above, the inner diameter of the second diameter portion 64b is smaller than the outer diameter of the one-sided elastic body 70. Therefore, the one-sided elastic bodies 70, namely the first to third elastic bodies 70a to 70c, elastically deform radially along the housing 6 and are disposed between the head portion 616 and the second diameter portion 64b.

[0134] Furthermore, by arranging the head portion 616 inside the second diameter portion 64b, the mounting hole 641 is positioned in front of the fixing hole 617. The mounting hole 641 and the fixing hole 617 are coaxial and mate in the direction of the drive shaft center O1.

[0135] Thus, the protrusion 64 is mounted to the first housing cover 61 via a side elastic member 70. Furthermore, the retaining portion 61b retains the protrusion 64 from the inside via the side elastic member 70. Therefore, the first housing cover 61 supports the protrusion 64.

[0136] Here, with the protrusion 64 mounted on the first housing cover 61, the second diameter portion 64b is forward-separated from the base end portion 615 of the retaining portion 61b, thus becoming non-contact with the base end portion 615. Furthermore, by providing a one-sided elastic body 70 between the second diameter portion 64b and the head end portion 616 of the retaining portion 61b, the second diameter portion 64b is also separated from the head end portion 616. In this way, the protrusion 64 is mounted on the first housing cover 61 with a gap between it and the first housing cover 61.

[0137] Furthermore, with the protrusion 64 installed on the first housing cover 61, a first limiting body 81 is provided in the compressor, on both the protrusion 64 and the retaining part 61b. The first limiting body 81 is an example of a "limiting body" in this invention.

[0138] like Figure 3 As shown, the first limiting body 81 has a first shaft member 81a and a first support member 81b. The first shaft member 81a is an example of a "shaft member" in this invention, and the first support member 81b is an example of a "support member" in this invention.

[0139] The first shaft member 81a is made of steel. The first shaft member 81a has a main body 811 and a pair of abutment portions 813. The main body 811 is cylindrical, extending along the drive shaft center O1. The length of the outer diameter of the main body 811 is a first length L1. The first length L1 is shorter than the second length L2 and the third length L3. Therefore, the main body 811 has a diameter smaller than the mounting hole 641.

[0140] Each abutment portion 813 is integrally formed on the main body portion 811. The abutment portions 813 are separated from each other in the direction of the drive shaft center O1. Each abutment portion 813 is formed in the shape of a disk with an outer diameter length of a second length L2. This second length L2 is longer than the first length L1 and slightly shorter than the third length L3. As a result, the outer diameter of each abutment portion 813 is larger than the outer diameter of the main body portion 811, so in the first shaft member 81a, each abutment portion 813 protrudes radially outward from the main body portion 811 toward the housing 6 in a flange-like manner. On the other hand, the outer diameter of each abutment portion 813 is smaller than the inner diameter of the mounting hole 641. It should be noted that as long as each abutment portion 813 is made of metal, the main body portion 811 can also be made of resin.

[0141] The first support member 81b is formed of a resin capable of elastic deformation, such as synthetic rubber. The first support member 81b is formed in an annular shape. Here, the outer diameter of the first support member 81b is a third length L3. This third length L3 is longer than the first length L1 and the second length L2, and is also slightly longer than the inner diameter of the mounting hole 641. Therefore, the outer diameter of the first support member 81b is a diameter larger than the outer diameter of each abutment portion 813 and the inner diameter of the mounting hole 641. On the other hand, the inner diameter of the first support member 81b is a first length L1.

[0142] The first support member 81b is disposed between the abutment portions 813 with the main body portion 811 inserted through its inner side. Thus, the first support member 81b is mounted on the first shaft member 81a while its movement in the direction of the drive shaft center O1 is restricted by each abutment portion 813. The outer diameter of the first support member 81b is larger than the outer diameter of each abutment portion 813; therefore, when mounted on the first shaft member 81a, the first support member 81b protrudes radially outward from each abutment portion 813.

[0143] The first limiting body 81 is inserted through the mounting hole 641 from the front. At this time, the outer diameter of the first support member 81b is larger than the inner diameter of the mounting hole 641, so the first support member 81b elastically deforms radially along the housing 6 and is inserted into the mounting hole 641. Thus, the first support member 81b elastically supports the first shaft member 81a within the mounting hole 641. Furthermore, in the first limiting body 81, the rear portion of the main body 811 is inserted into and fixed within the fixing hole 617.

[0144] Thus, by providing the first limiting body 81 to the protrusion 64 and the retaining part 61b, the protrusion 64 and the retaining part 61b are connected in the direction of the drive axis O1. As a result, the protrusion 64 is restricted to rotate relative to the retaining part 61b and thus relative to the first housing cover 61.

[0145] Furthermore, as described above, the outer diameter of each abutment portion 813 is smaller than the inner diameter of the mounting hole 641. Therefore, with the first limiting body 81 provided on the protrusion 64 and the retaining portion 61b, each abutment portion 813 is located within the mounting hole 641. Moreover, in this compressor, including when operation is stopped, when the load acting on the protrusion 64 is less than a preset value, each abutment portion 813 is radially separated from the inner circumferential surface of the mounting hole 641 along the housing 6. That is, when the load acting on the protrusion 64 is less than the preset value, each abutment portion 813 is not in contact with the inner circumferential surface of the mounting hole 641, and consequently, the second diameter portion 64b. Additionally, the main body portion 811, whose diameter is smaller than that of each abutment portion 813, is also not in contact with the second diameter portion 64b. It should be noted that details regarding the load acting on the protrusion 64 will be described later.

[0146] like Figure 1 As shown, the second housing cover 62 is disposed in front of the housing body 60. The second housing cover 62 is generally disk-shaped with the drive shaft O1 as the center and extends radially along the housing 6. The second housing cover 62 has a front surface 62a facing forward and a rear surface 62b located on the opposite side of the front surface 62a and facing rearward.

[0147] Additionally, a support portion 66 and a discharge port 69 are formed in the second housing cover 62. The support portion 66 is integrally formed at approximately the center of the rear surface 62b and protrudes rearward from the rear surface 62b. The support portion 66 is formed in a cylindrical shape centered on the drive shaft O1, and a second radial ball bearing 52, an elastic body 67 on the other side, and a shaft seal member 63 are disposed inside it.

[0148] The other side elastic body 67 is formed of a resin capable of elastic deformation, such as synthetic rubber, and is cylindrical. The other side elastic body 67 is disposed between the support portion 66 and the second radial ball bearing 52, surrounding the second radial ball bearing 52 from the outside and holding the second radial ball bearing 52 within the support portion 66. It should be noted that the other side elastic body 67 can also be formed of a metal or the like with lower rigidity than the second housing cover 62. Furthermore, the thickness of the other side elastic body 67 can be appropriately designed. Moreover, a sliding bearing can be disposed inside the support portion 66 instead of the second radial ball bearing 52.

[0149] The shaft seal member 63 is disposed inside the support portion 66, positioned forward of the second radial ball bearing 52 and the other side elastic body 67. The shaft seal member 63 is formed in an annular shape.

[0150] The discharge port 69 extends through the second housing cover 62 along the drive shaft O1 and communicates with the interior of the support portion 66. Additionally, the discharge port 69 is connected to the condenser (not shown) via piping (not illustrated).

[0151] In housing 6, the front surface 610a of the first housing cover 61 abuts against the rear end of the housing body 60, and the rear surface 62b of the second housing cover 62 abuts against the front end of the housing body 60. Furthermore, the housing body 60, the first housing cover 61, and the second housing cover 62 are fixed in the direction of the drive shaft O1 using multiple bolts (not shown).

[0152] Thus, within the housing 6, the housing body 60 is clamped in the front-to-back direction by the action of the first housing cover 61 and the second housing cover 62, with the front and rear ends of the housing body 60 respectively blocked by the first housing cover 61 and the second housing cover 62. Consequently, a vortex chamber 65 is formed within the housing body 60. The vortex chamber 65 communicates with the suction port 68. Therefore, refrigerant is drawn into the vortex chamber 65 from the outside of the housing 6 through the suction port 68. The refrigerant is an example of a "fluid" in this invention.

[0153] Furthermore, the protrusion 64 is mounted on the first housing cover 61 as described above, thereby positioning the protrusion 64 within the scroll chamber 65. The protrusion 64 protrudes forward from the first housing cover 61 toward the drive scroll 30 and the driven scroll 40 within the scroll chamber 65.

[0154] The electric motor 10 is housed within the scroll chamber 65. Thus, the scroll chamber 65 also serves as the motor chamber for housing the electric motor 10.

[0155] like Figure 2 As shown, the electric motor 10 consists of a stator 17 and a rotor 11. The stator 17 has a stator core 17a and a winding 17b. The stator core 17a is formed of an electromagnet steel sheet and is cylindrical with the drive shaft O1 as the center. The winding 17b is wound around the stator core 17a. Thus, the winding 17b forms a first coil end 171 and a second coil end 172.

[0156] In the stator 17, the stator core 17a is embedded in the outer peripheral surface of the second diameter portion 64b. Thus, the stator core 17a is fixed to the outer peripheral surface of the second diameter portion 64b, and further to the outer peripheral surface of the protrusion 64. It should be noted that, although not shown in the figure, multiple slits extending along the drive shaft center O1 are formed on the inner peripheral surface of the stator core 17a. Therefore, when the stator core 17a is fixed to the second diameter portion 64b, a gap is formed between the slits and the outer peripheral surface of the second diameter portion 64b. Alternatively, the stator core 17a can also be mounted to the protrusion 64 by methods other than embedding.

[0157] The rotor 11 is cylindrical around the drive shaft O1. Although detailed illustrations are omitted, the rotor 11 is composed of multiple permanent magnets corresponding to the stator 17 and stacked steel plates that fix each permanent magnet. Furthermore, the rotor 11 is formed with a diameter larger than that of the stator core 17a. Thus, the rotor 11 covers the stator core 17a from the outside within the scroll chamber 65. Moreover, multiple first bolt holes 11a are formed in the rotor 11. Each first bolt hole 11a passes through the rotor 11 along the drive shaft O1.

[0158] like Figure 1 As shown, the drive scroll 30 is housed within the scroll chamber 65. The drive scroll 30 is made of aluminum alloy. The drive scroll 30 has a drive end plate 31, a drive scroll body 33, a drive peripheral wall 35, a cover 37, and a shell 39.

[0159] The drive end plate 31 extends in a generally disk-shaped manner orthogonal to the drive shaft O1 and the driven shaft O2. The driven shaft O2 is eccentric relative to the drive shaft O1 and extends parallel to the drive shaft O1. That is, the driven shaft O2 is also parallel to the front-rear direction. The drive end plate 31 has a first front surface 311 facing forward and a first rear surface 312 located on the opposite side of the first front surface 311 and facing rearward.

[0160] Furthermore, a discharge port 32 is formed on the drive end plate 31. The discharge port 32 passes through the drive end plate 31 along the drive shaft O1 direction. Moreover, a discharge reed valve 57 and a retainer 58 are fixed to the first front surface 311 of the drive end plate 31 using fixing bolts 59. Thus, the discharge reed valve 57 can open and close the discharge port 32. And the retainer 58 can adjust the opening degree of the discharge reed valve 57.

[0161] The driving vortex body 33 is integral with the driving end plate 31 and protrudes rearward from the first rear surface 312, parallel to the driven vortex disk 40, the driving shaft O1, and the driven shaft O2. Although detailed illustrations are omitted, the driving vortex body 33 has the center of the vortex on the central side of the driving end plate 31 as the vortex center and protrudes outward in a vortex shape from the vortex center.

[0162] The drive peripheral wall 35 is formed as a cylinder extending parallel to both the drive shaft O1 and the driven shaft O2, with the drive shaft O1 as the center. The front end of the drive peripheral wall 35 is integral with the outer periphery of the drive end plate 31. Thus, the drive peripheral wall 35 surrounds the drive vortex body 33 from the outside and protrudes rearward in a cylindrical shape from the first rear surface 312. It should be noted that, although not shown in the figure, the outer peripheral end of the vortex in the drive vortex body 33 is connected to the inner peripheral surface of the drive peripheral wall 35.

[0163] The housing 37 has a wall portion 37a, an inner cylindrical portion 37b, and an outer cylindrical portion 37c. The wall portion 37a extends in a generally plate-like shape along the radial direction of the drive vortex 30, i.e., the radial direction of the housing 6. The wall portion 37a has a second front surface 371 facing forward and a second rear surface 372 located on the opposite side of the second front surface 371 and facing rearward.

[0164] Additionally, a recess 373 and an intake port 374 are formed in the wall portion 37a. The recess 373 is located approximately in the center of the second front surface 371 and is recessed from the second front surface 371 toward the rear.

[0165] The intake port 374 is located radially outward of the housing 6 compared to the recess 373. The intake port 374 extends through the wall portion 37a in the front-rear direction, with its front end opening on the second front surface 371 and its rear end opening on the second rear surface 372. It should be noted that multiple intake ports 374 may also be formed on the wall portion 37a.

[0166] Furthermore, in the wall portion 37a, a plurality of rings 22 are installed at the location between the recess 373 and the suction port 374. Although detailed illustrations are omitted, each ring 22 is arranged at equal intervals along the circumference of the recess 373 when facing forward, and surrounds the recess 373 from the outside. It should be noted that in this embodiment, the number of rings 22 is set to 6. Furthermore, in Figure 1 The diagram shows one of the six rings 22.

[0167] like Figure 2 As shown, the inner cylindrical portion 37b is located radially inside the stator 17 of the housing 6, and extends rearward in a cylindrical shape from the second rear surface 372 of the wall portion 37a in the direction of the drive shaft O1. Furthermore, the inner cylindrical portion 37b communicates with the recess 373 in the direction of the drive shaft O1. Additionally, the inner diameter of the inner cylindrical portion 37b is larger than the outer diameter of the first diameter portion 64a of the protrusion 64, and approximately the same as the outer diameter of the first radial ball bearing 51. Conversely, the outer diameter of the inner cylindrical portion 37b is smaller than the outer diameter of the second diameter portion 64b.

[0168] The outer cylindrical portion 37c is connected to the wall portion 37a and extends rearward in a cylindrical shape from the wall portion 37a in the direction of the drive shaft center O1. The outer diameter of the outer cylindrical portion 37c is formed to be approximately the same as the outer diameter of the wall portion 37a, the outer diameter of the drive peripheral wall 35, and the outer diameter of the rotor 11.

[0169] Furthermore, the inner diameter of the outer cylindrical portion 37c is larger than the outer diameter of the inner cylindrical portion 37b. Therefore, in the cover 37, the inner cylindrical portion 37b is positioned on the inner circumference of the outer cylindrical portion 37c, radially separated from the outer cylindrical portion 37c along the housing 6. Thus, in the cover 37, a receiving portion 38 is formed by the wall portion 37a, the inner cylindrical portion 37b, and the outer cylindrical portion 37c. The receiving portion 38 is a bottomed annular shape with an opening at the rear.

[0170] Furthermore, the suction port 374 formed in the wall portion 37a is located radially outward of the inner cylindrical portion 37b and inward of the outer cylindrical portion 37c in the housing 6. Thus, the suction port 374 communicates with the receiving portion 38 at the portion between the inner cylindrical portion 37b and the outer cylindrical portion 37c.

[0171] Furthermore, a plurality of second bolt holes 376 are formed in the outer cylindrical portion 37c and the wall portion 37a. Each second bolt hole 376 passes through the outer cylindrical portion 37c and the wall portion 37a along the direction of the drive shaft O1. It should be noted that, although the figure is omitted, the number of second bolt holes 376 is equal to the number of first bolt holes 11a formed in the rotor 11. Furthermore, in Figure 1 , Figure 2 , Figure 5 as well as Figure 6 The diagram shows one of the multiple first bolt holes 11a and one of the second bolt holes 376.

[0172] like Figure 1 As shown, the cover 37 abuts the second front surface 371 of the wall portion 37a against the rear end of the drive peripheral wall 35. Furthermore, the cover 37 abuts the rotor 11 against the rear end of the outer cylindrical portion 37c. In this state, first bolts 34a are inserted from the rotor 11 side in the order of each first bolt hole 11a and each second bolt hole 376, and the first bolts 34a are screwed onto the drive peripheral wall 35. Thus, the cover 37 is clamped between the drive peripheral wall 35 and the rotor 11 in the front-rear direction and is fixed to both the drive peripheral wall 35 and the rotor 11. As a result, the drive scroll 30 and the rotor 11 are integrally formed.

[0173] The outer casing 39 is a bottomed cylindrical member having an outer peripheral wall 39a and a front wall 39b. The outer peripheral wall 39a is cylindrical with the drive shaft O1 as its center. Here, the outer diameter of the outer peripheral wall 39a is formed to be approximately the same as the outer diameter of the drive peripheral wall 35.

[0174] The front wall 39b is located at the front end of the housing 39. The front wall 39b extends in a generally disk-shaped manner, orthogonal to the drive shaft O1 and the driven shaft O2. The front wall 39b is connected to the front end of the outer peripheral wall 39a. Furthermore, a protrusion 39d is formed on the front wall 39b. A discharge passage 390 is formed on the protrusion 39d. The discharge passage 390 passes through the protrusion 39d along the direction of the drive shaft O1.

[0175] Furthermore, third bolt holes 39e are formed in the outer peripheral wall 39a and the front wall 39b. These third bolt holes 39e penetrate the outer peripheral wall 39a and the front wall 39b along the direction of the drive shaft O1. It should be noted that, although the illustration is omitted, multiple third bolt holes 39e are formed in the outer peripheral wall 39a and the front wall 39b. Moreover, in... Figure 1 The middle figure shows one of the multiple third bolt holes 39e.

[0176] The outer casing 39 has its rear surface of the outer peripheral wall 39a abutting against the front end of the drive peripheral wall 35. Furthermore, in this state, the second bolts 34b are inserted into each of the third bolt holes 39e, and the second bolts 34b are screwed into the drive peripheral wall 35. Thus, in the drive volute 30, the outer casing 39 is fixed to the drive peripheral wall 35.

[0177] The housing 39 is fixed to the drive peripheral wall 35 in this way, thereby forming a discharge chamber 14 on the inner side of the outer peripheral wall 39a and between the front wall 39b of the housing 39 and the drive end plate 31. The discharge chamber 14 communicates with the discharge outlet 32 ​​and the discharge passage 390.

[0178] The driven scroll 40 is made of aluminum alloy. The driven scroll 40 has a driven end plate 41 and a driven scroll body 43.

[0179] The driven end plate 41 extends in a generally disk-shaped manner orthogonal to the drive shaft O1 and the driven shaft O2. The driven end plate 41 has a third front surface 411 facing forward and a third rear surface 412 located on the opposite side of the third front surface 411 and facing rearward.

[0180] A receiving recess 15 is formed in the driven end plate 41. The receiving recess 15 is located in the center of the driven end plate 41. The receiving recess 15 is cylindrically recessed from the third rear surface 412 of the driven end plate 41 toward the front, centered on the driven axis O2. Thus, the receiving recess 15 faces the rear of the driven end plate 41 and protrudes from the first radial portion 64a of the body 64.

[0181] A driven shaft portion 16 and a sliding bearing 13 are provided within the receiving recess 15. The driven shaft portion 16 has a bushing 53 and a driven pin 55. The bushing 53 is received within the receiving recess 15 via the sliding bearing 13. Although detailed drawings are omitted, the bushing 53 is embedded relative to the sliding bearing 13. The sliding bearing 13 is clearance-fitted into the receiving recess 15.

[0182] The driven pin 55 is inserted into the bushing 53. More specifically, the driven pin 55 is inserted into the bushing 53 at a position off-center from the center of the bushing 53, i.e., the driven shaft O2. The driven pin 55 protrudes rearward from the bushing 53 and then from the driven end plate 41.

[0183] Additionally, a rotary pin 21 is fixed in the driven end plate 41 at the location opposite to the ring 22. The rotary pin 21 protrudes rearward from the third rear surface 412. It should be noted that six rotary pins 21 are fixed in the driven end plate 41 in the same number as the rings 22. Furthermore, in... Figure 1 The diagram shows one of the six swivel pins 21.

[0184] Furthermore, the driven mechanism 20 is formed by these rotary pins 21 and rings 22. Here, the number of rotary pins 21 and rings 22 can be appropriately designed as long as there are 3 or more of them.

[0185] The driven vortex body 43 is integral with the driven end plate 41 and extends forward from the third front surface 411 of the driven end plate 41, parallel to the drive shaft O1 and the driven shaft O2. The driven vortex body 43 has the center of the vortex on the central side of the driven end plate 41 as the vortex center, and extends outward in a vortex shape from the vortex center.

[0186] In this compressor, a driven scroll 40 is housed within the drive scroll 30, more specifically within the drive scroll 30, at a location between the drive scroll body 33, the drive peripheral wall 35, and the housing 37. Furthermore, the drive scroll body 33 and the driven scroll body 43 are engaged. Thus, the drive scroll body 33 and the driven scroll body 43 are positioned opposite each other to form the compression chamber 12.

[0187] Furthermore, an intake section 30a is formed between the driving peripheral wall 35 and the driven scroll 40. That is, the driving scroll 33 and the driven scroll 43 are located within the intake section 30a. The intake section 30a is divided relative to the scroll chamber 65 by the driving peripheral wall 35 and the cover 37, and also by the driving end plate 31 relative to the discharge chamber 14. In addition, the intake section 30a communicates with the intake port 374. Thus, the intake section 30a communicates with the receiving section 38 through the intake port 374.

[0188] Furthermore, by housing the driven scroll 40 within the drive scroll 30, the second front surface 371 of the wall portion 37a and the third rear surface 412 of the driven end plate 41 are opposed in the direction of the drive shaft O1. Additionally, each rotary pin 21 is located within each ring 22. Thus, the drive scroll 30 and the driven scroll 40 are assembled in the front-rear direction, forming a scroll-type compression section 100. It should be noted that, strictly speaking, after the drive scroll body 33 and the driven scroll body 43 engage and each rotary pin 21 enters into each ring 22, the cover 37 in the drive scroll 30 is fixed to the drive peripheral wall 35 and the rotor 11.

[0189] In addition, by assembling the drive scroll 30 and the driven scroll 40, the receiving recess 15 of the driven end plate 41 and the driven shaft portion 16 are in a state facing the recess 373 of the cover 37.

[0190] The drive scroll 30 is positioned forward of the stator core 17a within the scroll chamber 65. Additionally, as... Figure 2 As shown, in the drive vortex 30, the inner cylindrical portion 37b of the cover 37 is inserted into the inner circumference of the end 171 of the first coil. Furthermore, in this state, a first radial ball bearing 51 is embedded within the inner cylindrical portion 37b. Thus, the inner cylindrical portion 37b, and consequently the cover 37, can be rotatably supported about the drive axis O1 relative to the first radial diameter 64a of the protrusion 64 via the first radial ball bearing 51.

[0191] Furthermore, the housing 37 is rotatably supported on the first radial portion 64a, thereby connecting the receiving portion 38 with the vortex chamber 65. The first coil end 171 is received within the receiving portion 38. Thus, the first coil end 171 is covered from the front by the wall portion 37a within the receiving portion 38, and is covered from the radially inner side of the housing 6 by the inner cylindrical portion 37b. Furthermore, the first coil end 171 is covered from the radially outer side of the housing 6 by the outer cylindrical portion 37c within the receiving portion 38.

[0192] In addition, such as Figure 1 As shown, in the drive scroll 30, the protrusion 39d of the housing 39 is inserted into the second radial ball bearing 52 and the shaft seal member 63. At this time, the protrusion 39d is embedded relative to the second radial ball bearing 52. Thus, the protrusion 39d is rotatably supported about the drive shaft O1 relative to the support portion 66 via the second radial ball bearing 52 and the other side elastic body 67. In this way, the drive scroll 30 is disposed in the scroll chamber 65 and is rotatably supported on the housing 6 by both the protrusion 64 and the support portion 66 about the drive shaft O1.

[0193] Furthermore, the outer casing 39 is supported by the support portion 66, so that the discharge passage 390 is in a rearward position relative to the discharge connection port 69. Thus, the discharge chamber 14 communicates with the discharge connection port 69 through the discharge passage 390. Moreover, the discharge passage 390 and the space between the discharge connection port 69 and the scroll chamber 65 are sealed by the shaft seal member 63.

[0194] On the other hand, in the driven scroll 40, the driven pin 55 of the driven shaft portion 16 is inserted into the pin hole 4. Thus, the driven scroll 40 is positioned forward of the protrusion 64 and is rotatably supported about the driven axis O2 relative to the first diameter portion 64a. Furthermore, by being rotatably supported on the first diameter portion 64a in this way, the driven scroll 40 is also rotatably supported on the protrusion 64 forward of the stator core 17a. That is, the driven scroll 40 is rotatably supported on the protrusion 64 about the driven axis O2 at a position closer to the compression chamber 12 than the stator core 17a. Moreover, by inserting the driven pin 55 into the pin hole 4, the driven scroll 40 is rotatably supported on the first diameter portion 64a about the driven axis O2 at a position radially inward of the housing 6 than the inner cylindrical portion 37b. Thus, the driven scroll 40 differs from the driving scroll 30, and is supported on the housing 6 only by the protrusion 64, which can rotate about the driven axis O2.

[0195] In addition, in this compressor, a stator core 17a, a first radial ball bearing 51, and a bushing 53 of the driven shaft portion 16 are arranged sequentially from the first housing cover 61 side toward the compression chamber 12 side in the direction of the drive shaft O1.

[0196] In the compressor configured as described above, such as Figure 1 as well as Figure 2 As shown by the dashed arrow, the low-temperature, low-pressure refrigerant, having passed through the evaporator, is drawn into the scroll chamber 65 from the suction port 68. Furthermore, if the electric motor 10 operates, the rotor 11 rotates, and this rotation is transmitted to the drive scroll 30, thus driving the drive scroll 30 to rotate around the drive shaft O1 within the scroll chamber 65. That is, the drive scroll 30 and the rotor 11 rotate as a unit. At this time, in the driven mechanism 20, each rotary pin 21 slides in contact with the inner circumferential surface of each ring 22, causing each ring 22 to rotate relative to the center of each rotary pin 21. In this way, the driven mechanism 20 transmits the torque of the drive scroll 30 to the driven scroll 40.

[0197] As a result, the driven scroll 40 rotates passively around the driven axis O2 under the action of the driving scroll 30 and the driven mechanism 20. At this time, the driven mechanism 20 restricts the rotation of the driven scroll 40. Thus, the driven scroll 40 revolves relative to the driving scroll 30 around the driven axis O2. Furthermore, by driving the scroll body 33 and the driven scroll body 43 to rotate within the intake section 30a, the volume of the compression chamber 12 is changed.

[0198] In addition, the refrigerant drawn into the vortex chamber 65, such as Figure 1 as well as Figure 2As shown by the dashed arrow, the refrigerant flows between the rotor 11 and the stator 17 and reaches the receiving section 38. Additionally, the refrigerant drawn into the scroll chamber 65 also flows through the slit formed in the stator core 17a and reaches the receiving section 38. Furthermore, the refrigerant drawn into the scroll chamber 65 also flows through the gap between the slot (not shown) formed in the stator core 17a and the winding 17b and reaches the receiving section 38. Thus, the refrigerant in the receiving section 38 is drawn into the compression chamber 12 from the suction port 374 through the suction section 30a.

[0199] Furthermore, under the driving rotation of the drive scroll 30 and the driven rotation of the driven scroll 40, the compression chamber 12 seals the refrigerant inside itself and reduces its volume to compress the refrigerant. Thus, the high-pressure refrigerant, compressed to the discharge pressure, is discharged from the discharge port 32 to the discharge chamber 14, and then through the discharge passage 390 and the discharge connection port 69 to the outside of the compressor. At this time, in this compressor, since the shaft seal member 63 seals the discharge passage 390 and the discharge connection port 69 with the scroll chamber 65, it prevents the refrigerant from flowing from the discharge passage 390 towards the discharge connection port 69 from flowing into the scroll chamber 65.

[0200] In this compressor, a drive scroll 30 is rotatably supported on the first diameter portion 64a of the protrusion 64 about the drive axis O1, and a driven scroll 40 is rotatably supported on the driven axis O2. Therefore, heat generated during operation due to friction with the rotating drive scroll 30 and driven scroll 40 is inevitably transferred to the protrusion 64. Furthermore, in this compressor, the stator core 17a is fixed to the second diameter portion 64b of the protrusion 64, so heat generated by the electric motor 10 during operation is inevitably transferred to the protrusion 64.

[0201] Furthermore, in this compressor, the vibrations generated during operation of the drive scroll 30 and the driven scroll 40 are also transmitted to the protrusion 64. In addition, in this compressor, the torque variation of the electric motor 10, which accompanies the compression of the refrigerant in the compression chamber 12, is generated during operation, and therefore the vibration caused by the torque variation of the electric motor 10 is inevitably transmitted from the stator core 17a to the protrusion 64.

[0202] In this compressor, the protrusion 64 is formed separately from the first housing cover 61, and the protrusion 64 is installed on the first housing cover 61 with a gap between it and the first housing cover 61. Therefore, in this compressor, heat from the protrusion 64 is difficult to transfer to the first housing cover 61, thus preventing the first housing cover 61 and consequently the housing 6 from reaching high temperatures during operation. Thus, in this compressor, the reduction in the durability of the housing 6 due to heat can be appropriately suppressed. In particular, in this compressor, the protrusion 64 is made of steel, thus increasing its heat resistance. Therefore, in this compressor, the reduction in the durability of the protrusion 64 due to heat can also be appropriately suppressed.

[0203] Furthermore, by mounting the protrusion 64 to the first housing cover 61 with a gap between it and the first housing cover 61, vibrations transmitted from the electric motor 10, the drive scroll 30, and the driven scroll 40 to the protrusion 64 during operation are also difficult to transmit from the protrusion 64 to the first housing cover 61 in this compressor. Thus, in this compressor, vibration of the housing 6 during operation can be appropriately suppressed.

[0204] In particular, in this compressor, a one-sided elastic body 70 is provided between the second diameter portion 64b of the protrusion 64 and the head end portion 616 of the retaining portion 61b. Therefore, in this compressor, by elastically deforming the one-sided elastic body 70 (i.e., the first to third elastic bodies 70a to 70c) between the second diameter portion 64b and the head end portion 616, vibration transmission from the protrusion 64 to the first housing cover 61 can be appropriately suppressed. Regarding this point, in this compressor, vibration of the housing 6 during operation can also be appropriately suppressed.

[0205] Furthermore, in this compressor, the protrusion 64 and the retaining portion 61b are connected in the direction of the drive shaft O1 by the first shaft member 81a of the first limiting body 81 being inserted into the mounting hole 641 of the second diameter portion 64b and the fixing hole 617 of the head end portion 616. In this way, the relative rotation of the protrusion 64 with respect to the first housing cover 61 is restricted in this compressor.

[0206] Here, as Figure 3 As shown, in the first limiting body 81, a first support member 81b is provided in the first shaft member 81a. The first support member 81b is inserted into the mounting hole 641 through the first shaft member 81a and is located within the mounting hole 641. Furthermore, the first support member 81b elastically deforms within the mounting hole 641 and supports the first shaft member 81a. In this way, in the compressor, the transmission of vibration from the protrusion 64 to the first housing cover 61 through the first limiting body 81 is also appropriately suppressed.

[0207] Therefore, the compressor of Example 1 exhibits excellent durability and quiet operation.

[0208] However, in this compressor, under the compression load based on the compression of the refrigerant within the compression chamber 12, the driving scroll 30 and driven scroll 40 inevitably experience a load that causes them to tilt axially relative to the compressor's longitudinal direction, i.e., the housing 6. Furthermore, since these driving scrolls 30 and driven scrolls 40 are rotatably supported on the protrusion 64, a load that causes the protrusion 64 to tilt axially relative to the housing 6 is inevitably applied to the protrusion 64 by the driving scrolls 30 and driven scrolls 40.

[0209] Regarding this point, in this compressor, if a load exceeding a specified value is applied to the protruding body 64, and as... Figure 4 As shown, under this load, the protrusion 64 tilts at a predetermined angle or more within the vortex chamber 65. In the first restraining body 81, one of the abutment portions 813, except for the first support member 81b, abuts against the inner circumferential surface of the mounting hole 641. Here, the protrusion 64 is made of steel, and the first shaft member 81a, including the abutment portion 813, is also made of steel. Therefore, in this compressor, when a predetermined load or more is applied to the protrusion 64, and the protrusion 64 tilts at a predetermined angle or more, the inner circumferential surface of the mounting hole 641 comes into metal contact with the abutment portion 813.

[0210] Thus, in this compressor, when the load acting on the protrusion 64 is smaller than a preset value, such as Figure 3 As shown, by separating the abutment portions 813 radially from the inner circumferential surface of the mounting hole 641 along the housing 6, the first shaft member 81a and the protrusion 64 are made non-contact, thereby appropriately suppressing the transmission of vibration from the protrusion 64 to the first housing cover 61 through the first restraining body 81. On the other hand, when a load above a set value is applied to the protrusion 64, by making the inner circumferential surface of the mounting hole 641 in metal contact with the abutment portion 813, the protrusion 64 can be firmly supported by the first restraining body 81. As a result, the durability of the protrusion 64 can also be improved in this compressor.

[0211] Furthermore, this prevents the protrusion 64 from tilting excessively within the scroll chamber 65 under load. Therefore, in this compressor, the protrusion 64 can appropriately support the drive scroll 30 and the driven scroll 40 for rotation. It should be noted that... Figure 4 The diagram shows the protrusion 64 tilting downwards and to the lower left of the paper surface within the scroll chamber 65 under load. However, it is also possible that the protrusion 64 tilts upwards and to the upper left of the paper surface within the scroll chamber 65 under load. Even in this case, the inner circumferential surface of the mounting hole 641 can still make metal contact with the abutment portion 813 in this compressor.

[0212] Furthermore, in this compressor, with the first shaft member 81a inserted through the mounting hole 641 and the fixing hole 617, the first limiting body 81 is positioned forward of the other elastic body 70. That is, the first limiting body 81 is located at a position closer to the compression chamber 12 in the direction of the drive shaft center O1 of the other elastic body 70. Thus, in this compressor, when a load exceeding a set value is applied to the protrusion 64 as described above, the first limiting body 81 can support the protrusion 64 at a position close to the compression chamber 12. In addition, by positioning the first limiting body 81 at a position closer to the compression chamber 12 in the direction of the drive shaft center O1 of the other elastic body 70, excessive elongation of the shaft length of the first shaft member 81a can also be prevented in this compressor.

[0213] (Example 2)

[0214] like Figure 5 As shown, in the compressor of Embodiment 2, a mounting hole 610c is formed in the main body 61a of the first housing cover 61, and a fixing hole 17c is formed in the stator core 17a. It should be noted that, unlike the compressor of Embodiment 1, in this compressor, a mounting hole 641 is not formed in the second diameter portion 64b, and a fixing hole 617 is not formed in the head end portion 616.

[0215] Mounting hole 610c is formed in the cover body portion 61a in the radial direction of the housing 6, outside the retaining portion 61b. Mounting hole 610c passes through the cover body portion 61a in the direction of the drive shaft O1. Thus, mounting hole 610c connects the inside of the scroll chamber 65 with the outside of the compressor. By forming mounting hole 610c in this way, the first housing cover 61 in this compressor becomes a "specific component" in this invention. It should be noted that, although detailed drawings are omitted, mounting hole 610c, like mounting hole 641, is formed in a cylindrical shape with an inner diameter longer than the first length L1 and the second length L2, and slightly shorter than the third length L3.

[0216] The fixing hole 17c extends along the drive shaft center O1 inside the stator core 17a. The fixing hole 17c opens on the rear end face of the stator core 17a at a position inside the second coil end 172. The fixing hole 17c is inserted into the outer peripheral surface of the second diameter portion 64b of the protrusion 64 through the stator core 17a, and the protrusion 64 is mounted on the first housing cover 61, thus being positioned in front of the mounting hole 610c. Furthermore, the mounting hole 610c and the fixing hole 17c are coaxial and mate in the drive shaft center O1 direction.

[0217] Furthermore, in this compressor, a second limiting body 82 is provided instead of the first limiting body 81. The second limiting body 82 is also an example of a "limiting body" in this invention.

[0218] The second limiting body 82 has a second shaft member 82a and a second support member 82b. The second shaft member 82a and the second support member 82b are examples of "shaft member" and "support member" in this invention, respectively.

[0219] The second shaft member 82a is made of steel. The second shaft member 82a has a main body portion 821 and a pair of abutment portions 823. The main body portion 821 has the same structure as the main body portion 811, except that its shaft length is longer than that of the main body portion 811 in the compressor of Embodiment 1. Thus, the length of the outer diameter of the main body portion 821 is formed as a first length L1.

[0220] Each abutment portion 823 is integrally formed with the main body portion 821. The other structures of each abutment portion 823 are the same as those of the abutment portion 813 in the compressor of Embodiment 1. Therefore, the length of the outer diameter of each abutment portion 823 is a second length L2. Furthermore, the second support member 82b has the same structure as the first support member 81b in the compressor of Embodiment 1. Therefore, the length of the outer diameter of the second support member 82b is a third length L3.

[0221] In the second limiting body 82, the second shaft member 82a is inserted through the mounting hole 610c from the rear, i.e., outside the compressor. At this time, in the second limiting body 82, the second support member 82b elastically deforms radially along the housing 6 and is inserted into the mounting hole 610c. Furthermore, in the second limiting body 82, the front portion of the main body 821 is inserted into and fixed within the fixing hole 17c.

[0222] Thus, in this compressor, the first housing cover 61 is connected to the stator 17 in the direction of the drive shaft O1 under the action of the second limiting body 82. Here, the stator core 17a is embedded and mounted in the second diameter portion 64b of the protrusion 64, so the protrusion 64 is connected to the first housing cover 61 via the stator 17 and the second limiting body 82. In this way, in this compressor, the protrusion 64 is also restricted from rotating relative to the holding portion 61b, and thus relative to the first housing cover 61.

[0223] Furthermore, in the second limiting body 82, the second support member 82b elastically deforms within the mounting hole 610c, thereby elastically supporting the second shaft member 82a within the mounting hole 610c and sealing the interior of the scroll chamber 65 with the exterior of the compressor. Other structures in this compressor are the same as those in Embodiment 1; the same reference numerals are used for the same structures, and detailed descriptions related to the structures are omitted.

[0224] In this compressor, similar to the compressor of Embodiment 1, heat from the protrusion 64 is difficult to transfer to the housing 6, and vibration is difficult to transfer from the protrusion 64 to the first housing cover 61.

[0225] Furthermore, although detailed illustrations are omitted, in this compressor, the stator core 17a is mounted on the second diameter portion of the protrusion 64. Therefore, if the protrusion 64 tilts at a predetermined angle or greater within the scroll chamber 65 under the action of a load acting on it, the stator 17 also tilts integrally with the protrusion 64. Thus, similar to the compressor of Embodiment 1, in this compressor, when a predetermined load is applied to the protrusion 64 and both the protrusion 64 and the stator 17 tilt at a predetermined angle or greater, one of the abutment portions 823 in the second limiting body 82 abuts against the inner circumferential surface of the mounting hole 610c. Here, the first housing cover 61 is made of aluminum alloy, so in this compressor, the abutment portion 823 can also make metal contact with the inner circumferential surface of the mounting hole 610c. As a result, this compressor can also perform the same function as the compressor of Embodiment 1.

[0226] (Example 3)

[0227] like Figure 6 As shown, in the compressor of Embodiment 3, a connecting hole 643 is formed in the second diameter portion 64b. The connecting hole 643 has the same structure as the mounting hole 641 in the compressor of Embodiment 1, and is formed in the second diameter portion 64b at a position coaxial with the fixing hole 617. Furthermore, the connecting hole 643 is formed in a cylindrical shape with an inner diameter that is longer than the first length L1 and the second length L2, and slightly shorter than the third length L3, and passes through the second diameter portion 64b in the direction of the drive shaft center O1.

[0228] Additionally, in this compressor, the stator 17 has an extension member 17d. The extension member 17d is formed of a sheet metal and extends in a generally rectangular shape along the radial direction of the housing 6. The extension member 17d is fixed to the stator core 17a by a retaining pin 17e. More specifically, the extension member 17d is fixed to the front end face of the stator core 17a at a position inside the first coil end 171, and extends from the stator core 17a radially toward the protrusion 64 in the housing 6.

[0229] A mounting hole 17f is formed in the extension member 17d. The mounting hole 17f is formed in the extension member 17d at a position coaxial with the connecting hole 643 and the fixing hole 617. By forming the mounting hole 17f in this way, the extension member 17d, i.e. the stator 17, in the compressor becomes the "specific member" in this invention.

[0230] The mounting hole 17f is formed in a cylindrical shape with an inner diameter longer than both the first length L1 and the second length L2, and slightly shorter than the third length L3, and the protruding member 17d extends through it along the drive shaft center O1. Thus, the mounting hole 17f and the connecting hole 643 have the same diameter. It should be noted that the connecting hole 643 may also be formed with a diameter larger than or smaller than the mounting hole 17f.

[0231] In addition, a third limiting body 83 is provided in place of the first limiting body 81 in this compressor. The third limiting body 83 is also an example of a "limiting body" in this invention.

[0232] The third limiting body 83 has a third shaft member 83a and a third support member 83b. The third shaft member 83a and the third support member 83b are examples of "shaft member" and "support member" in this invention, respectively.

[0233] The third shaft member 83a is made of steel. The third shaft member 83a has a main body 831 and a pair of abutment portions 833. The main body 831 has the same structure as the main body 831 except that its shaft length is longer than that of the main body 811 in the compressor of Embodiment 1. Thus, the length of the outer diameter of the main body 831 is formed as a first length L1.

[0234] Each abutment portion 833 is integrally formed on the main body portion 831. The other structures of each abutment portion 833 are the same as those of the abutment portion 813 in the compressor of Embodiment 1. Therefore, the length of the outer diameter of each abutment portion 833 is formed as a second length L2. Furthermore, the third support member 83b has the same structure as the first support member 81b in the compressor of Embodiment 1. Therefore, the length of the outer diameter of the third support member 83b is formed as a third length L3.

[0235] In the third limiting body 83, the third shaft member 83a is inserted through the mounting hole 17f from the front. At this time, in the third limiting body 83, the third support member 83b elastically deforms radially along the housing 6 and is inserted into the mounting hole 17f. Furthermore, in the third limiting body 83, the main body portion 831 is inserted through the communicating hole 643 and the fixing hole 617 in sequence, thereby being fixed in the fixing hole 617.

[0236] Thus, in this compressor, the first housing cover 61, the protrusion 64, and the stator 17 are connected in the direction of the drive shaft O1 under the action of the third limiting body 83. As a result, in this compressor, the protrusion 64 is also restricted to rotate relative to the holding part 61b, and thus relative to the first housing cover 61.

[0237] Furthermore, in the third limiting body 83, the third support member 83b elastically deforms within the mounting hole 17f, thereby elastically supporting the third shaft member 83a within the mounting hole 17f. The other structures in this compressor are the same as those in Embodiment 1; the same reference numerals are used for the same structures, and detailed descriptions related to the structures are omitted.

[0238] In this compressor, similar to the compressor of Embodiment 1, heat from the protrusion 64 is difficult to transfer to the housing 6, and vibration is difficult to transfer from the protrusion 64 to the first housing cover 61.

[0239] Furthermore, although detailed illustrations are omitted, in this compressor, if the protrusion 64 tilts at a predetermined angle or more within the scroll chamber 65 under the load acting on it, the stator 17 also tilts integrally with the protrusion 64. Therefore, in this compressor, when a predetermined load or more is applied to the protrusion 64, and both the protrusion 64 and the stator 17 tilt at a predetermined angle or more, one of the abutting portions 833 in the third limiting body 83 abuts against the inner circumferential surface of the mounting hole 17f. Here, the extended member 17d is made of metal, so in this compressor, the abutting portion 833 can also make metal contact with the inner circumferential surface of the mounting hole 17f. As a result, this compressor can also perform the same function as the compressor of Embodiment 1.

[0240] The present invention has been described above according to embodiments 1 to 3, but the present invention is not limited to the above embodiments 1 to 3, and can be applied by appropriate modifications without departing from its spirit.

[0241] For example, in the compressor of Embodiment 1, the stator core 17a is fixed to the protrusion 64. However, it is not limited to this, and it can also be configured such that the rotor 11 is arranged between the stator 17 and the protrusion 64 by fixing the stator core 17a to the inner circumferential surface of the housing body 60. The same applies to the compressor of Embodiment 3.

[0242] Furthermore, in the compressor of Embodiment 1, the first shaft member 81a has two abutment portions 813. However, it is not limited to this, and the first shaft member 81a may also have either of the two abutment portions 813. The same applies to the compressors of Embodiments 2 and 3.

[0243] Alternatively, in the compressor of Embodiment 1, it can also be configured such that a mounting hole 641 is formed at the head end portion 616 of the retaining portion 61b and a fixing hole 617 is formed at the second diameter portion 64b of the protrusion 64, thereby inserting the first shaft member 81a of the first limiting body 81 through the mounting hole 641 and the fixing hole 617 from the rear.

[0244] Alternatively, in the compressor of Embodiment 2, it can also be configured such that the second shaft member 82a of the second limiting body 82 is inserted from the front relative to the mounting hole 610c and the fixing hole 17c by forming a mounting hole 610c in the stator core 17a and a fixing hole 17c in the cover body 61a.

[0245] Alternatively, in the compressor of embodiment 3, it can also be configured such that a mounting hole 17f is formed at the head end 616 and a fixing hole 617 is formed at the extension member 17d, thereby inserting the third shaft member 83a of the third limiting body 83 through the mounting hole 17f, the connecting hole 643 and the fixing hole 617 from the rear.

[0246] Alternatively, in the compressor of Embodiment 3, the stator 17 can be mounted on the protrusion 64 by means of a clearance fit between the stator core 17a and the second diameter portion 64b.

[0247] Furthermore, in the compressor of Embodiment 1, one side elastic body 70 is composed of first to third elastic bodies 70a to 70c. However, it is not limited to this, and one side elastic body 70 may also be composed of a cylindrical member extending along the drive shaft center O1. The same applies to the compressors of Embodiments 2 and 3.

[0248] Alternatively, in the compressor of Embodiment 1, a one-sided elastic body 70 may be disposed between the second radial portion 64b and the base end portion 615 in the direction of the drive shaft O1. The same applies to the compressors of Embodiments 2 and 3.

[0249] Furthermore, in the compressor of Example 1, the one-sided elastomer 70 can be omitted. The same applies to the compressors of Examples 2 and 3.

[0250] Alternatively, in the compressor of Embodiment 1, a structure can be configured such that a first radial ball bearing 51 is embedded in the first diameter portion 64a of the protrusion 64, and the first radial ball bearing 51 is fitted with a clearance fit in the inner cylindrical portion 37b of the cover 37. Alternatively, a structure can be configured such that a sliding bearing 13 is embedded in the receiving recess 15, and the bushing 53 is fitted with a clearance fit in the sliding bearing 13. The same applies to the compressors of Embodiments 2 and 3.

[0251] Alternatively, in the compressor of Example 1, the protrusion 64 can also be formed using materials other than steel, such as aluminum alloy. The same applies to the compressors of Examples 2 and 3.

[0252] Furthermore, in the compressor of Embodiment 1, the retaining part 61b is integrally formed on the cover body part 61a. However, it is not limited to this, and it is also possible to configure it so that the retaining part 61b and the cover body part 61a are formed separately and the retaining part 61b is fixed to the cover body part 61a. In this case, it is also easy to form the retaining part 61b and the cover body part 61a using different materials. The same applies to the compressors of Embodiments 2 and 3.

[0253] Furthermore, in the compressor of Embodiment 1, the first diameter portion 64a and the second diameter portion 64b of the protrusion 64 are integrally formed. However, it is not limited to this; it may also be configured such that the first diameter portion 64a and the second diameter portion 64b are formed separately, and the first diameter portion 64a is fixed to the second diameter portion 64b. Alternatively, the protrusion 64 may have only the first diameter portion 64a or the second diameter portion 64b. The same applies to the compressors of Embodiments 2 and 3.

[0254] Furthermore, in the compressor of Embodiment 1, the housing 6 is composed of a housing body 60, a first housing cover 61, and a second housing cover 62. However, it is not limited to this, and the housing 6 may also have other structures. The same applies to the compressors of Embodiments 2 and 3.

[0255] In addition, the following inventions are included in this specification.

[0256] (Note 1)

[0257] A dual-rotary scroll compressor comprises a housing, a drive scroll, a driven scroll, a drive mechanism, and a driven mechanism.

[0258] The housing has a scroll chamber that houses the driving scroll, the driven scroll, and the driving mechanism.

[0259] The drive mechanism has a stator and a rotor that is driven to rotate under the action of the stator.

[0260] The drive vortex is driven to rotate around the drive shaft under the action of the drive mechanism.

[0261] The driven scroll is eccentric relative to the driving scroll and rotates passively around the driven axis under the action of the driving scroll and the driven mechanism.

[0262] The driving scroll and the driven scroll form a compression chamber that compresses the fluid under the action of the driving rotation and the driven rotation.

[0263] The dual rotary scroll compressor is characterized in that...

[0264] The vortex chamber is equipped with:

[0265] A protrusion, which is separately formed from the housing and mounted with a gap between it and the housing, extends toward the drive volute and the driven volute along the drive axis; and

[0266] A limiting body that restricts the relative rotation of the protrusion relative to the housing.

[0267] The drive scroll is rotatably supported on the protrusion about the drive shaft.

[0268] The driven scroll is rotatably supported on the protrusion about the driven axis.

[0269] The limiting body has:

[0270] A shaft member, which is inserted into the protrusion and the housing; and

[0271] A support member is disposed on the outer peripheral surface of the shaft member.

[0272] The support member elastically deforms between a specific member, which is one of the protrusion and the housing, and the shaft member, and supports the shaft member.

[0273] (Note 2)

[0274] A dual-rotary scroll compressor comprises a housing, a drive scroll, a driven scroll, a drive mechanism, and a driven mechanism.

[0275] The housing has a scroll chamber that houses the driving scroll, the driven scroll, and the driving mechanism.

[0276] The drive mechanism has a stator and a rotor that covers the stator from the outside and is driven to rotate under the action of the stator.

[0277] The drive vortex is driven to rotate around the drive shaft under the action of the drive mechanism.

[0278] The driven scroll is eccentric relative to the driving scroll and rotates passively around the driven axis under the action of the driving scroll and the driven mechanism.

[0279] The driving scroll and the driven scroll form a compression chamber that compresses the fluid under the action of the driving rotation and the driven rotation.

[0280] The dual rotary scroll compressor is characterized in that...

[0281] The vortex chamber is equipped with:

[0282] A protrusion, which is separately formed from the housing and mounted with a gap between it and the housing, extends toward the drive volute and the driven volute along the drive axis; and

[0283] A limiting body that restricts the relative rotation of the protrusion relative to the housing.

[0284] The stator is mounted on the protrusion.

[0285] The drive scroll is rotatably supported on the protrusion about the drive shaft.

[0286] The driven scroll is rotatably supported on the protrusion about the driven axis.

[0287] The limiting body has:

[0288] A shaft member, which is inserted into the housing and the stator; and

[0289] A support member is disposed on the outer peripheral surface of the shaft member.

[0290] The support member elastically deforms between a specific member, which is one of the housing and the stator, and the shaft member, and supports the shaft member.

[0291] (Note 3)

[0292] A dual-rotary scroll compressor comprises a housing, a drive scroll, a driven scroll, a drive mechanism, and a driven mechanism.

[0293] The housing has a scroll chamber that houses the driving scroll, the driven scroll, and the driving mechanism.

[0294] The drive mechanism has a stator and a rotor that is driven to rotate under the action of the stator.

[0295] The drive vortex is driven to rotate around the drive shaft under the action of the drive mechanism.

[0296] The driven scroll is eccentric relative to the driving scroll and rotates passively around the driven axis under the action of the driving scroll and the driven mechanism.

[0297] The driving scroll and the driven scroll form a compression chamber that compresses the fluid under the action of the driving rotation and the driven rotation.

[0298] The dual rotary scroll compressor is characterized in that...

[0299] The vortex chamber is equipped with:

[0300] A protrusion, which is separately formed from the housing and mounted with a gap between it and the housing, extends toward the drive volute and the driven volute along the drive axis; and

[0301] A limiting body that restricts the relative rotation of the protrusion relative to the housing.

[0302] The drive scroll is rotatably supported on the protrusion about the drive shaft.

[0303] The driven scroll is rotatably supported on the protrusion about the driven axis.

[0304] The limiting body has:

[0305] A shaft member, which is inserted into the housing, the protrusion, and the stator; and

[0306] A support member is disposed on the outer peripheral surface of the shaft member.

[0307] The support member elastically deforms between a specific component, which is any one of the housing, the protrusion, and the stator, and the shaft member, and supports the shaft member.

[0308] (Note 4)

[0309] According to any one of Appendices 1 to 3, the dual rotary scroll compressor, wherein...

[0310] The housing, the protrusion, and the stator are made of metal.

[0311] The specific component has a mounting hole through which the limiting body is inserted.

[0312] The shaft member has a main body through which the support member is inserted, and a metal abutment portion disposed in the main body and inserted into the mounting hole through the limiting body and located within the mounting hole.

[0313] The support member is inserted into the mounting hole through the limiting body, and elastically deforms to lie within the mounting hole and abut against the inner circumferential surface of the mounting hole.

[0314] The abutting portion separates from the inner peripheral surface when the load acting on the protrusion is less than a preset value, and abuts against the inner peripheral surface when the load acting on the protrusion is greater than the preset value.

[0315] (Note 5)

[0316] According to Appendix 4, the dual rotary scroll compressor, wherein...

[0317] The outer diameter of the main body is formed to be a first length that is shorter than the inner diameter of the mounting hole.

[0318] The outer diameter of the abutment portion is formed into a second length that is longer than the first length and shorter than the inner diameter of the mounting hole.

[0319] The outer diameter of the support member is formed into a third length that is longer than the second length.

[0320] (Note 6)

[0321] The dual rotary scroll compressor according to any one of Appendices 1 to 5, wherein,

[0322] An elastic body that can deform elastically and supports the protrusion is provided between the protrusion and the housing.

[0323] The limiting body is located in the direction of the drive shaft center, closer to the compression chamber than at least a portion of the elastic body.

[0324] (Note 7)

[0325] The dual rotary scroll compressor according to any one of Appendices 1 to 6, wherein,

[0326] The protrusion is made of steel.

[0327] Industrial applicability

[0328] This invention can be applied to vehicle air conditioning systems, etc.

Claims

1. A dual-rotary scroll compressor, comprising a housing, a drive scroll, a driven scroll, a drive mechanism, and a driven mechanism. The housing has a scroll chamber that houses the driving scroll, the driven scroll, and the driving mechanism. The drive mechanism has a stator and a rotor that is driven to rotate under the action of the stator. The drive vortex is driven to rotate around the drive shaft under the action of the drive mechanism. The driven scroll is eccentric relative to the driving scroll and rotates passively around the driven axis under the action of the driving scroll and the driven mechanism. The driving scroll and the driven scroll form a compression chamber that compresses the fluid under the action of the driving rotation and the driven rotation. The dual rotary scroll compressor is characterized in that... The vortex chamber is equipped with: A protrusion, which is separately formed from the housing and mounted with a gap between it and the housing, extends toward the drive volute and the driven volute along the drive axis; and A limiting body that restricts the relative rotation of the protrusion relative to the housing. The drive scroll is rotatably supported on the protrusion about the drive shaft. The driven scroll is rotatably supported on the protrusion about the driven axis. The limiting body has: A shaft member, which is inserted into the protrusion and the housing; and A support member is disposed on the outer peripheral surface of the shaft member. The support member elastically deforms between a specific member, which is one of the protrusion and the housing, and the shaft member, and supports the shaft member.

2. A dual-rotary scroll compressor, comprising a housing, a drive scroll, a driven scroll, a drive mechanism, and a driven mechanism. The housing has a scroll chamber that houses the driving scroll, the driven scroll, and the driving mechanism. The drive mechanism has a stator and a rotor that covers the stator from the outside and is driven to rotate under the action of the stator. The drive vortex is driven to rotate around the drive shaft under the action of the drive mechanism. The driven scroll is eccentric relative to the driving scroll and rotates passively around the driven axis under the action of the driving scroll and the driven mechanism. The driving scroll and the driven scroll form a compression chamber that compresses the fluid under the action of the driving rotation and the driven rotation. The dual rotary scroll compressor is characterized in that... The vortex chamber is equipped with: A protrusion, which is separately formed from the housing and mounted with a gap between it and the housing, extends toward the drive volute and the driven volute along the drive axis; and A limiting body that restricts the relative rotation of the protrusion relative to the housing. The stator is mounted on the protrusion. The drive scroll is rotatably supported on the protrusion about the drive shaft. The driven scroll is rotatably supported on the protrusion about the driven axis. The limiting body has: A shaft member, which is inserted into the housing and the stator; and A support member is disposed on the outer peripheral surface of the shaft member. The support member elastically deforms between a specific member, which is one of the housing and the stator, and the shaft member, and supports the shaft member.

3. A dual-rotary scroll compressor, comprising a housing, a drive scroll, a driven scroll, a drive mechanism, and a driven mechanism. The housing has a scroll chamber that houses the driving scroll, the driven scroll, and the driving mechanism. The drive mechanism has a stator and a rotor that is driven to rotate under the action of the stator. The drive vortex is driven to rotate around the drive shaft under the action of the drive mechanism. The driven scroll is eccentric relative to the driving scroll and rotates passively around the driven axis under the action of the driving scroll and the driven mechanism. The driving scroll and the driven scroll form a compression chamber that compresses the fluid under the action of the driving rotation and the driven rotation. The dual rotary scroll compressor is characterized in that... The vortex chamber is equipped with: A protrusion, which is separately formed from the housing and mounted with a gap between it and the housing, extends toward the drive volute and the driven volute along the drive axis; and A limiting body that restricts the relative rotation of the protrusion relative to the housing. The drive scroll is rotatably supported on the protrusion about the drive shaft. The driven scroll is rotatably supported on the protrusion about the driven axis. The limiting body has: A shaft member, which is inserted into the housing, the protrusion, and the stator; and A support member is disposed on the outer peripheral surface of the shaft member. The support member elastically deforms between a specific component, which is any one of the housing, the protrusion, and the stator, and the shaft member, and supports the shaft member.

4. The dual rotary scroll compressor according to any one of claims 1 to 3, wherein, The housing, the protrusion, and the stator are made of metal. The specific component has a mounting hole through which the limiting body is inserted. The shaft member has a main body through which the support member is inserted, and a metal abutment portion disposed in the main body and inserted into the mounting hole through the limiting body and located within the mounting hole. The support member is inserted into the mounting hole through the limiting body, and elastically deforms to lie within the mounting hole and abut against the inner circumferential surface of the mounting hole. The abutting portion separates from the inner peripheral surface when the load acting on the protrusion is less than a preset value, and abuts against the inner peripheral surface when the load acting on the protrusion is greater than the preset value.

5. The dual rotary scroll compressor according to claim 4, wherein, The outer diameter of the main body is formed to be a first length that is shorter than the inner diameter of the mounting hole. The outer diameter of the abutment portion is formed into a second length that is longer than the first length and shorter than the inner diameter of the mounting hole. The outer diameter of the support member is formed into a third length that is longer than the second length.

6. The dual rotary scroll compressor according to any one of claims 1 to 5, wherein, An elastic body that can deform elastically and supports the protrusion is provided between the protrusion and the housing. The limiting body is located in the direction of the drive shaft center, closer to the compression chamber than at least a portion of the elastic body.

7. The dual rotary scroll compressor according to any one of claims 1 to 6, wherein, The protrusion is made of steel.

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