Double rotary scroll compressor

Abstract

Provided is a double-rotation scroll compressor that is excellent in quietness and can be inhibited from being large. The compressor of the present invention includes a housing (6), a driving scroll (30), a driven scroll (40), and a driving mechanism (10). The driving mechanism (10) includes a stator (17) and a rotor (11). The stator includes a stator core (17a) supported by the housing (6). A protruding body (64) is provided in a scroll chamber (65) so as to be fixed to the stator core (17a). The driving scroll (30) includes a cover (37) that is rotated by the rotor (11). The cover (37) is supported by the protruding body (64) at a position on the compression chamber (12) side of the stator core (17a) in the driving axis (O1) direction in a manner that allows rotation around the driving axis (O1). The driven scroll (40) is supported by the protruding body (64) at a position on the compression chamber (12) side of the stator core (17a) in the driving axis (O1) direction in a manner that allows rotation around the driven axis (O2).

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 driving scroll member, a driven scroll member, a drive mechanism, and a driven mechanism. The housing has a scroll chamber that houses the drive mechanism, the driving scroll member, and the driven scroll member. Fluid is drawn into the scroll chamber from outside the housing. Specifically, in this document, the fluid is 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 member has a housing. This housing has a cylindrical extension. The rotor is fixed to the outer periphery of the extension. Thus, the drive scroll member can be driven to rotate about a drive axis by the rotation of the rotor. The driven scroll member is eccentric relative to the drive scroll member and can be driven to rotate about a driven axis by the drive scroll member and the driven mechanism. These drive scroll members and driven scroll members form a compression chamber that compresses the fluid by the drive rotation and the driven rotation.

[0004] Furthermore, in this compressor, a protrusion is integrally provided on the outer casing. The protrusion is formed into a generally cylindrical shape with a fixed outer diameter and extends into the scroll chamber towards the driving scroll member and the driven scroll member in the direction of the drive shaft. The protrusion extends into the interior of the extension, and the cover is supported by a bearing to allow rotation. Additionally, a fluid passage extending in the direction of the drive shaft is formed inside the protrusion. One side of the fluid passage communicates with the compression chamber in the direction of the drive shaft, and the other side communicates with the outside of the outer casing.

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

[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 this type of compressor, the torque of the drive mechanism required to drive the scroll member to rotate changes as the fluid is compressed in the compression chamber. In the conventional compressor described above, the rotor is fixed to an extension of the housing, and this extension is rotatably supported by a protrusion. Therefore, in this compressor, the torque variation of the drive mechanism is transmitted from the extension to the protrusion, and then to the outer casing. Furthermore, the torque variation of the drive scroll member is also transmitted to the protrusion through the extension. Consequently, a torque acts on the protrusion, twisting its direction; therefore, in this compressor, the outer casing, including the protrusion, is prone to vibration during operation. As a result, the compressor's quietness is compromised.

[0011] Therefore, it was considered to suppress the vibration of the housing during operation by increasing the rigidity of the housing, but this would result in the housing and, consequently, the compressor becoming larger.

[0012] 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 quiet operation and the ability to suppress large-scale operation.

[0013] Methods for solving problems

[0014] The first dual-rotary scroll compressor of the present invention includes a housing, a driving scroll member, a driven scroll member, a driving mechanism, and a driven mechanism.

[0015] The housing has a scroll chamber that houses the driving scroll member, the driven scroll member, and the driving mechanism.

[0016] The drive mechanism has a stator and a rotor that covers the stator from the outside and is driven to rotate by the stator.

[0017] The stator has a stator core supported by the housing.

[0018] The driving scroll component is driven to rotate around the driving shaft via the driving mechanism.

[0019] The driven scroll member is eccentric relative to the driving scroll member and rotates driven about the driven axis via the driving scroll member and the driven mechanism.

[0020] The driving scroll member and the driven scroll member form a compression chamber that compresses the fluid through the driving rotation and the driven rotation.

[0021] Its features are,

[0022] A protrusion is provided in the vortex chamber. The protrusion is fixed to the stator core and extends toward the driving vortex member and the driven vortex member in the direction of the drive shaft.

[0023] The driving vortex component has a cover that is driven to rotate by the rotor.

[0024] The cover is supported on the protrusion in a position relative to the stator core on the compression chamber side in the direction of the drive shaft, in a manner that allows it to rotate about the drive shaft.

[0025] The driven scroll member is supported on the protrusion in a position on the compression chamber side of the stator core in the direction of the drive shaft, in a manner that allows it to rotate about the driven shaft.

[0026] In the first dual-rotary scroll compressor of the present invention, a protrusion is provided in the scroll chamber, and a stator core is fixed to the protrusion. Therefore, in this compressor, during operation, torque variations of the drive mechanism are inevitably transmitted from the stator core, i.e., the stator, to the protrusion.

[0027] Furthermore, in this compressor, the drive scroll member has a cover, which is supported on the protrusion in a manner rotatable about the drive shaft, positioned closer to the compression chamber side than the stator core in the drive shaft direction. Also in this compressor, the driven scroll member is supported, relative to the protrusion, in a manner rotatable about the driven shaft, positioned closer to the compression chamber side than the stator core in the drive shaft direction. Therefore, in this compressor, during operation, torque variations in both the drive scroll member and the driven scroll member are inevitably transmitted to the protrusion.

[0028] In this compressor, fluid compression is achieved by rotating both the driving scroll and the driven scroll. Therefore, during operation, the phase of the torque variation transmitted from the driving scroll and the driven scroll to the protrusion is opposite to the phase of the torque variation transmitted from the stator core to the protrusion.

[0029] Therefore, in this compressor, at the protruding body, the torque variation transmitted from the stator core to the protruding body cancels out the torque variation transmitted from the driving scroll member and the driven scroll member to the protruding body. Thus, in this compressor, although the torque that twists the direction of the protruding body inevitably acts on it during operation, this torque acting on the protruding body can be reduced. Therefore, the torque transmitted from the protruding body to the outer casing can be reduced, and thus, in this compressor, the vibration of the outer casing during operation can be appropriately suppressed.

[0030] Furthermore, since the torque transmitted to the housing can be reduced in this way, it is not necessary to excessively increase the rigidity of the housing when suppressing housing vibration during operation in this compressor. Therefore, it is difficult to make the housing large in this compressor.

[0031] Therefore, the first dual-rotary scroll compressor of the present invention has excellent quiet operation and can suppress large-scale operation.

[0032] In the first compressor of the present invention, the outer casing may have: a first wall extending radially along the outer casing; a peripheral wall connected to the outer periphery of the first wall and extending cylindrically from the first wall along the drive axis direction; and a second wall extending radially and connected to the peripheral wall on the side opposite to the first wall in the drive axis direction. The first wall may support the protrusion. Furthermore, the drive scroll member may have a supported body located on the side opposite to the cover in the drive axis direction, separated by the compression chamber. Moreover, the cover may be supported on the protrusion via a first bearing in a manner rotatable about the drive axis. Preferably, the supported body is supported on the second wall via a second bearing in a manner rotatable about the drive axis.

[0033] In this case, in the drive scroll member, besides the cover being supported on the protrusion in a manner that allows it to rotate around the drive axis, the supported body is also supported on the second wall in a manner that allows it to rotate around the drive axis. Therefore, the drive scroll member is properly supported on the housing by both the cover and the supported body. Here, the cover is supported on the protrusion via the first bearing, thus minimizing the torque variation transmitted from the drive scroll member to the protrusion via the first bearing. Similarly, the supported body is supported on the second wall via the second bearing, thus minimizing the torque variation transmitted from the supported body to the second wall via the second bearing as well.

[0034] The first wall may have a retaining portion extending into the vortex chamber in the direction of the drive shaft. Preferably, the protrusion engages with the retaining portion. In this case, the first wall can properly retain the protrusion via the retaining portion. Furthermore, the torque acting on the protrusion is difficult to transmit to the retaining portion, thus making the inner and outer shells, including the first wall, less prone to vibration.

[0035] Preferably, a first elastic body capable of elastic deformation is provided between the protrusion and the first wall. In this case, the elastic deformation of the first elastic body can appropriately suppress the transmission of torque acting on the protrusion to the first wall. Therefore, in this compressor, the outer casing is less prone to vibration, thus achieving higher noise reduction.

[0036] Furthermore, it is preferable to provide a second elastic body capable of elastic deformation between the second bearing and the second wall. In this case, the elastic deformation of the second elastic body can appropriately suppress the transmission of torque from the supported body to the second wall. As a result, the outer casing of the compressor is also less prone to vibration, thus achieving higher noise levels.

[0037] The second dual-rotary scroll compressor of the present invention includes a housing, a driving scroll member, a driven scroll member, a driving mechanism, and a driven mechanism.

[0038] The housing has a scroll chamber that houses the driving scroll member, the driven scroll member, and the driving mechanism.

[0039] The drive mechanism has a stator and a rotor that covers the stator from the outside and is driven to rotate by the stator.

[0040] The stator has a stator core supported by the housing.

[0041] The driving scroll component is driven to rotate around the driving shaft via the driving mechanism.

[0042] The driven scroll member is eccentric relative to the driving scroll member and rotates driven about the driven axis via the driving scroll member and the driven mechanism.

[0043] The driving scroll member and the driven scroll member form a compression chamber that compresses the fluid through the driving rotation and the driven rotation.

[0044] Its features are,

[0045] A protrusion is provided in the vortex chamber. The protrusion is fixed to the stator core and extends toward the driving vortex member and the driven vortex member in the direction of the drive shaft.

[0046] The driving vortex component has a cover that is driven to rotate by the rotor.

[0047] The cover is supported on the protrusion in a manner that allows it to rotate about the drive axis.

[0048] The driven scroll member is supported on the protrusion in a manner that allows it to rotate about the driven axis.

[0049] The protrusion is mounted to the housing via an elastically deformable elastomer.

[0050] In the second dual-rotary scroll compressor of the present invention, a protrusion is provided in the scroll chamber, and a stator core is fixed to the protrusion. In addition, the cover of the driving scroll member is supported on the protrusion in a manner that allows it to rotate about the driving axis, and the driven scroll member is also supported on the protrusion in a manner that allows it to rotate about the driven axis.

[0051] Therefore, in this compressor, similarly to the first compressor of the present invention described above, the torque variation transmitted from the stator core to the protrusion at the protrusion is canceled out by the torque variation transmitted from the driving scroll member and the driven scroll member to the protrusion. Thus, in this compressor, the torque acting on the protrusion can also be reduced.

[0052] Furthermore, in this compressor, the protrusion is mounted to the housing via an elastically deformable elastomer. Therefore, by elastically deforming the elastomer, the transmission of torque acting on the protrusion to the housing can be appropriately suppressed. Consequently, housing vibration during operation can also be appropriately suppressed in this compressor.

[0053] Furthermore, similar to the first compressor of the present invention described above, in this compressor, it is not necessary to excessively increase the rigidity of the housing when suppressing housing vibration during operation. Therefore, in this compressor, it is also difficult to make the housing large.

[0054] Therefore, the second dual-rotary scroll compressor of the present invention has excellent quiet operation and can suppress large-scale operation.

[0055] In the second compressor of the present invention, the housing may have: a first wall extending radially along the housing; a peripheral wall connected to the outer periphery of the first wall and extending cylindrically from the first wall along the drive axis direction; and a second wall extending radially and connected to the peripheral wall on the side opposite to the first wall in the drive axis direction. The first wall may be used for mounting a protrusion and for holding an elastomer. Furthermore, the drive scroll member may have a supported body located on the side opposite to the cover in the drive axis direction, separated by the compression chamber. Moreover, the cover may be supported on the protrusion via a first bearing in a manner rotatable about the drive axis. Preferably, the supported body is supported on the second wall via a second bearing in a manner rotatable about the drive axis.

[0056] In this case, in the drive scroll member, besides the cover being supported on the protrusion in a manner that allows it to rotate around the drive axis, the supported body is also supported on the second wall in a manner that allows it to rotate around the drive axis. Therefore, the drive scroll member is properly supported on the housing by both the cover and the supported body. Here, the cover is supported on the protrusion via the first bearing, thus minimizing the torque variation transmitted from the drive scroll member to the protrusion via the first bearing. Similarly, the supported body is supported on the second wall via the second bearing, thus minimizing the torque variation transmitted from the supported body to the second wall via the second bearing as well.

[0057] The first wall may have a retaining portion extending into the vortex chamber in the direction of the drive shaft. Additionally, the protrusion can engage with the retaining portion while allowing the elastomer and the retaining portion to enter the interior of the protrusion. Furthermore, it is preferable that the elastomer is radially disposed between the retaining portion and the protrusion, and is radially held by the retaining portion and the protrusion.

[0058] In this case, by inserting the elastomer and the retaining part into the interior of the protrusion and engaging the protrusion with the retaining part, the protrusion can be easily installed on the first wall and then on the housing. Furthermore, by having the elastomer held radially by the retaining part and the protrusion, the elastomer can be easily positioned between the retaining part and the protrusion, and then between the first wall and the protrusion.

[0059] Preferably, the elastomer has a first elastomer disposed between the protrusion and the first wall, and a second elastomer disposed between the second bearing and the second wall.

[0060] In this case, in addition to the first elastic body being able to appropriately suppress the transmission of torque acting on the protrusion from the protrusion to the first wall, the second elastic body is also able to appropriately suppress the transmission of torque from the supported body to the second wall. Therefore, in this compressor, the outer casing is less prone to vibration.

[0061] In the first compressor of the present invention, it is preferable that at least a portion of the first elastomer overlaps with the stator core in the radial direction. In this case, compared to the case where the first elastomer and the stator core are arranged without overlapping each other in the radial direction, it is possible to suppress the increase in the size of the compressor in the drive shaft direction while ensuring the contact area between the retaining portion and the protrusion and the first elastomer.

[0062] Furthermore, in the second compressor of the present invention, it is preferable that at least a portion of the elastomer overlaps with the stator core in the radial direction. In this case, compared to the case where the elastomer and the stator core are arranged without overlapping each other in the radial direction, it is possible to suppress the increase in the size of the compressor in the drive shaft direction while ensuring the contact area between the retaining portion and the protrusion and the elastomer.

[0063] In the first and second compressors of the present invention, the protrusion may have: a first diameter portion, on which a cover is supported via a first bearing in a manner rotatable about a drive shaft, and a driven scroll member is supported in the first diameter portion in a manner rotatable about a driven shaft; and a second diameter portion, the diameter of which is larger than that of the first diameter portion, and a stator core is disposed on the outer peripheral surface of the second diameter portion. Preferably, the first diameter portion is located on the compression chamber side in the drive shaft direction compared to the second diameter portion.

[0064] In this case, at the protrusion, the torque variation transmitted from the stator core to the protrusion cancels out the torque variation transmitted from the driving scroll member and the driven scroll member to the protrusion. Furthermore, in this compressor, the housing and the driven scroll member can be appropriately supported on the protrusion at a position closer to the compression chamber than the stator core.

[0065] Preferably, the driven scroll member is supported at the first radial portion at a position that is radially inner than the cover body, in a manner that allows it to rotate about the driven axis.

[0066] In this case, the driven scroll member may have a driven shaft portion supported on the first diameter portion. Furthermore, it is preferable that the stator core, the first bearing, and the driven shaft portion are arranged sequentially from the first wall side toward the compression chamber side in the drive shaft direction.

[0067] In these cases, it is possible to appropriately suppress the enlargement of the housing in the direction of the drive shaft.

[0068] Invention Effects

[0069] The first and second dual-rotary scroll compressors of the present invention have excellent quiet operation and can suppress large-scale operation. Attached Figure Description

[0070] Figure 1 This is a cross-sectional view of the compressor in Example 1.

[0071] Figure 2 The compressor relating to Embodiment 1 is shown in an enlarged cross-sectional view of the main parts, including the protrusion and the cover.

[0072] Figure 3 The compressor relating to Embodiment 2 is shown to have a protrusion and a cover, etc. Figure 2 The same enlarged sectional view of the main parts.

[0073] Figure 4 The compressor relating to Embodiment 3 is shown with the protrusion and cover, etc. Figure 2 The same enlarged sectional view of the main parts.

[0074] Figure 5 The compressor relating to Embodiment 4 is shown to have a protrusion and a cover, etc. Figure 2 The same enlarged sectional view of the main parts.

[0075] Figure 6 The compressor relating to Embodiment 5 is shown with a protrusion and a cover, etc. Figure 2 The same enlarged sectional view of the main parts. Detailed Implementation

[0076] Hereinafter, embodiments 1 to 5 embodying the present invention will be described with reference to the accompanying drawings. The compressors of embodiments 1 to 5 are mounted in a vehicle (not shown) and constitute the vehicle's air conditioning system.

[0077] (Example 1)

[0078] like Figure 1As shown, the compressor of Embodiment 1 includes a housing 6, an electric motor 10, a driving scroll member 30, a driven scroll member 40, and a driven mechanism 20. The electric motor 10 is an example of the "driving mechanism" in this invention.

[0079] In this embodiment, by Figure 1 The solid arrows shown define 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 Later, with Figure 1 Correspondingly, the compressor's front-to-back and vertical directions are specified. Furthermore, these front-to-back directions are provided as an example for illustrative purposes, demonstrating that the compressor can appropriately adjust its posture depending on the vehicle it is mounted on.

[0080] like Figure 1 As shown, the outer casing 6 is composed of an outer casing body 60, a first outer casing cover 61, and a second outer casing cover 62. The outer casing body 60 is an example of a "peripheral wall" in this invention, the first outer casing cover 61 is an example of a "first wall" in this invention, and the second outer casing cover 62 is an example of a "second wall" in this invention.

[0081] The main body 60 is made of aluminum alloy. The main body 60 is cylindrical with the drive shaft O1 as the center, and has openings at the front and rear ends. The drive shaft O1 is parallel to the front-to-back direction.

[0082] Additionally, a suction port 68 is formed in the outer casing 60. The suction port 68 extends radially along the outer casing 60. The suction port 68 is connected to the evaporator (not shown) via piping (not shown).

[0083] The first housing cover 61 is made of aluminum alloy. The first housing cover 61 is located at the rear end of the housing body 60. The first housing cover 61 is generally disk-shaped, centered on the drive shaft O1, and extends radially along the housing 6. The first housing cover 61 has a front surface 61a facing forward and a rear surface 61b located on the opposite side of the front surface 61a and facing rearward. Alternatively, the first housing cover 61 may be made of steel.

[0084] The first housing cover 61 has a retaining portion 611. The retaining portion 611 is integrally formed on the first housing cover 61. The retaining portion 611 protrudes forward in a cylindrical shape from the center of the front surface 61a in the direction of the drive axis O1.

[0085] Furthermore, within the outer casing 6, and more specifically within the vortex chamber 65 (described later), an elastomer 67 and a protrusion 64 are provided. The elastomer 67 is composed of a first elastomer 67a and a second elastomer 67b. Details regarding the second elastomer 67b will be described later.

[0086] like Figure 2As shown, the first elastomer 67a is formed of synthetic rubber. The first elastomer 67a is cylindrical and extends along the drive shaft O1 direction with approximately the same length as the retaining portion 611. Furthermore, the first elastomer 67a is mounted on the outer peripheral surface of the retaining portion 611. Thus, the retaining portion 611 holds the first elastomer 67a. On the other hand, the first elastomer 67a mounted to the retaining portion 611 covers the retaining portion 611 from the outside. Moreover, the material and thickness of the first elastomer 67a can be appropriately designed.

[0087] The protrusion 64 is formed from a component independent of the first outer casing 61, which includes the retaining portion 611. The protrusion 64 is made of steel. The protrusion 64 is composed of a first diameter portion 641 and a second diameter portion 642. The first diameter portion 641 constitutes the front portion of the protrusion 64. The length of the outer diameter of the first diameter portion 641 is formed as a first length L1. Thus, the diameter of the first diameter portion 641 is smaller than the diameter of the insertion hole 375 described later. A pin hole 4 is formed in the first diameter portion 641. The pin hole 4 extends along the direction of the drive shaft center O1 inside the first diameter portion 641 and opens at the front end face of the first diameter portion 641.

[0088] Additionally, a first radial ball bearing 51 is provided on the outer peripheral surface of the first radial portion 641. The first radial ball bearing 51 is an example of the "first bearing" in this invention. Alternatively, a sliding bearing may be provided on the outer peripheral surface of the first radial portion 641 instead of the first radial ball bearing 51.

[0089] The second diameter portion 642 is formed as a bottomed cylindrical shape with an opening at the rear. The length of the outer diameter of the second diameter portion 642 is a second length L2. This second length L2 is longer than the first length L1. Therefore, the diameter of the second diameter portion 642 is larger than the diameter of the first diameter portion 641. Furthermore, the length of the inner diameter of the second diameter portion 642 is a third length L3. This third length L3 is longer than the first length L1 and is approximately the same as the length of the outer diameter of the first elastic body 67a. Therefore, the inner diameter of the second diameter portion 642 is larger than the diameter of the holding portion 611 and is approximately the same as the outer diameter of the first elastic body 67a.

[0090] The second diameter portion 642 is integrated with the first diameter portion 641 at its front end. Thus, the second diameter portion 642 constitutes the rear part of the protrusion 64.

[0091] The retaining portion 611 and the first elastic body 67a enter the interior of the second radial portion 642, that is, the interior of the protrusion 64. Thus, with the first elastic body 67a positioned between the retaining portion 611 and the second radial portion 642 in the radial direction of the outer casing 6, the retaining portion 611 and the second radial portion 642 are engaged. Furthermore, the first elastic body 67a is held radially by the retaining portion 611 and the second radial portion 642 of the outer casing 6. In this way, in this compressor, the protrusion 64 is mounted on the first outer casing 61. In other words, the protrusion 64 is mounted on the first outer casing 61 while simultaneously covering the retaining portion 611 and the first elastic body 67a from the outside. As a result, the first outer casing 61 supports the protrusion 64.

[0092] 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 made of aluminum alloy. 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.

[0093] Additionally, a support portion 66 and a discharge port 69 are formed on the second outer casing 62. The support portion 66 is integrally formed approximately at 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, a second elastic body 67b, and a shaft seal member 63 are disposed inside it. The second radial ball bearing 52 is an example of the "second bearing" in this invention.

[0094] The second elastomer 67b is formed of synthetic rubber, similar to the first elastomer 67a. The second elastomer 67b is cylindrical. It is disposed between the support portion 66 and the second radial ball bearing 52, surrounding the second radial ball bearing 52 from the outside while holding the second radial ball bearing 52 within the support portion 66. Furthermore, the second elastomer 67b can also be formed of a metal or the like, which has a lower rigidity than the second outer casing 62. Additionally, the thickness of the second elastomer 67b can be appropriately designed. Moreover, a sliding bearing can be installed inside the support portion 66 instead of the second radial ball bearing 52.

[0095] The shaft seal member 63 is disposed inside the support portion 66, positioned forward of the second radial ball bearing 52 and the second elastic body 67b. The shaft seal member 63 is formed in annular shape.

[0096] The discharge port 69 penetrates the second housing 62 in the direction of the drive shaft O1 and communicates with the interior of the support 66. In addition, the discharge port 69 is connected to the condenser (not shown) via a pipe (not shown).

[0097] In the housing 6, the front surface 61a 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 by a plurality of bolts (not shown).

[0098] In this way, within the outer casing 6, the outer casing body 60 is clamped in the front-to-back direction by the first outer casing cover 61 and the second outer casing cover 62, with the front and rear ends of the outer casing body 60 respectively blocked by the first outer casing cover 61 and the second outer casing cover 62. Consequently, a vortex chamber 65 is formed within the outer casing body 60. The vortex chamber 65 communicates with the intake port 68. Therefore, refrigerant is drawn into the vortex chamber 65 from the outside of the outer casing 6 through the intake port 68. The refrigerant is an example of a "fluid" in this invention.

[0099] Furthermore, by mounting the protrusion 64 to the first housing cover 61 as described above, the protrusion 64 protrudes from the first housing cover 61 into the vortex chamber 65 in the direction of the drive shaft O1. More specifically, the protrusion 64 protrudes forward from the first housing cover 61 toward the drive vortex member 30 and the driven vortex member 40.

[0100] 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.

[0101] 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 into a cylindrical shape centered on the drive shaft O1. 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.

[0102] The first coil end 171 protrudes forward in a cylindrical shape from the stator core 17a in the direction of the drive shaft O1. The second coil end 172 is located on the opposite side of the first coil end 171, separated from the stator core 17a. The second coil end 172 protrudes backward in a cylindrical shape from the stator core 17a in the direction of the drive shaft O1.

[0103] In the stator 17, the stator core 17a is embedded into the outer peripheral surface of the second diameter portion 642. Thus, the stator core 17a is fixed to the outer peripheral surface of the second diameter portion 642, and further to the outer peripheral surface of the protrusion 64. Furthermore, 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, with the stator core 17a fixed to the second diameter portion 642, gaps are formed between the slits and the outer peripheral surface of the second diameter portion 642.

[0104] Furthermore, by fixing the stator core 17a to the protrusion 64 as shown, the first elastic body 67a is positioned radially inward of the housing 6, closer to the stator 17. A portion of the first elastic body 67a overlaps with the stator core 17a radially with the housing 6. That is, in Figure 2 Within the region X1 shown, the first elastic body 67a and the stator core 17a overlap radially in the housing 6. Alternatively, it can be configured such that the first elastic body 67a overlaps radially in the housing 6 entirely with the stator core 17a by changing the length of at least one of the first elastic body 67a and the stator core 17a in the direction of the drive shaft O1.

[0105] 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 laminated 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 vortex chamber 65. Moreover, multiple first bolt holes 11a are formed in the rotor 11. Each first bolt hole 11a penetrates the rotor 11 in the direction of the drive shaft O1.

[0106] like Figure 1 As shown, the driving scroll component 30 is housed within the scroll chamber 65. The driving scroll component 30 is made of aluminum alloy. The driving scroll component 30 has a driving end plate 31, a driving scroll body 33, a driving peripheral wall 35, a cover 37, and a housing 39.

[0107] 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.

[0108] Furthermore, a discharge port 32 is formed on the drive end plate 31. The discharge port 32 extends through the drive end plate 31 in the direction of the drive shaft O1. Moreover, a discharge reed valve 57 and a retainer 58 are fixed to the first front surface 311 of the drive end plate 31 by 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.

[0109] The driving scroll body 33 is integral with the driving end plate 31 and protrudes rearward from the first rear surface 312, that is, parallel to the driven scroll member 40 and the driving shaft O1 and the driven shaft O2. Although detailed illustrations are omitted, the driving scroll body 33 has the center of the scroll on the central side of the driving end plate 31 as the center and protrudes outward in a scroll shape from the center of the scroll.

[0110] 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, while surrounding the drive vortex body 33 from the outside, protrudes rearward in a cylindrical shape from the first rear surface 312. Furthermore, 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.

[0111] like Figure 2 As shown, the cover 37 has a wall portion 37a, an inner cylindrical portion 37b, a connecting portion 37c, and an outer cylindrical portion 37d. The wall portion 37a extends in a generally plate-like shape in the radial direction of the cover 37. 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.

[0112] 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.

[0113] The intake port 374 is located radially outward of the recess 373 relative to the cover 37. 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.

[0114] 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 around the circumference of the recess 373, facing forward, and surrounds the recess 373 from the outside. In this embodiment, the number of rings 22 is set to six. Figure 1 , Figure 2 The diagram shows one of the six rings 22. (The following is a separate section.) Figure 3 The same applies.

[0115] The inner cylindrical portion 37b is formed radially in the housing 37 at a position closer to the stator 17 and extends rearward in a cylindrical shape in the direction of the drive shaft center O1. The inner diameter of the inner cylindrical portion 37b is formed to be larger than the diameter of the first radial portion 641 of the protrusion 64 and is approximately the same as the outer diameter of the first radial ball bearing 51.

[0116] The connecting portion 37c is located between the wall portion 37a and the inner cylindrical portion 37b, and is integral with both the wall portion 37a and the inner cylindrical portion 37b. The connecting portion 37c expands in diameter from the inner cylindrical portion 37b toward the wall portion 37a in the direction of the drive shaft center O1, thereby connecting the wall portion 37a and the inner cylindrical portion 37b. Thus, the outer peripheral surface of the inner cylindrical portion 37b is continuous with the second rear surface 372 of the wall portion 37a via the connecting portion 37c.

[0117] Furthermore, an insertion hole 375 is formed inside the connecting portion 37c in the cover 37. The insertion hole 375 extends along the drive shaft O1 and communicates with the inner cylindrical portion 37b and the recess 373.

[0118] The outer cylindrical portion 37d is integrally formed with the wall portion 37a at the outer periphery of the wall portion 37a. Thus, while connected to the wall portion 37a, the outer cylindrical portion 37d 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 37d is formed to be approximately the same as the outer diameter of the drive peripheral wall 35 and the outer diameter of the rotor 11.

[0119] Furthermore, the inner diameter of the outer cylindrical portion 37d is larger than the diameters of the inner cylindrical portion 37b and the connecting portion 37c. Therefore, in the cover 37, the inner cylindrical portion 37b and the connecting portion 37c are arranged radially apart from the outer cylindrical portion 37d on the inner circumference of the outer cylindrical portion 37d. Thus, in the cover 37, a receiving portion 38 is formed by the wall portion 37a, the inner cylindrical portion 37b, the connecting portion 37c, and the outer cylindrical portion 37d. The receiving portion 38 is a bottomed annular shape with an opening at the rear. The receiving portion 38 communicates with the suction port 374.

[0120] Furthermore, a plurality of second bolt holes 376 are formed in the outer cylindrical portion 37d. Each second bolt hole 376 penetrates the outer cylindrical portion 37d in the direction of the drive shaft center O1. Moreover, although not shown in the figure, the number of second bolt holes 376 is equal to the number of first bolt holes 11a formed in the rotor 11. Figures 1-3 The figure shows one of the plurality of first bolt holes 11a and one of the plurality of second bolt holes 376.

[0121] The cover 37 abuts the front end of the outer cylindrical portion 37d against the rear end of the drive peripheral wall 35. Additionally, the cover 37 abuts the rotor 11 against the rear end of the outer cylindrical portion 37d. Furthermore, in this state, while inserting the first bolt 34a into each of the first bolt holes 11a and each of the second bolt holes 376 from the rotor 11 side, the first bolt 34a is screwed into the drive peripheral wall 35. In this way, the cover 37 is fixed to both the drive peripheral wall 35 and the rotor 11 while being held between them. As a result, the drive vortex member 30 and the rotor 11 become an integral unit.

[0122] like Figure 1 As shown, the housing 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.

[0123] 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 outer periphery of 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. The protrusion 39d is an example of a "supported body" in this invention. The protrusion 39d is integrally formed at the center of the front wall 39b and protrudes forward from the front wall 39b in the direction of the drive shaft O1. The outer diameter of the protrusion 39d is formed to be approximately the same as the inner diameter of the second radial ball bearing 52 and the inner diameter of the shaft seal member 63. Additionally, a discharge passage 390 is formed on the protrusion 39d. The discharge passage 390 extends through the protrusion 39d in the direction of the drive shaft O1.

[0124] Furthermore, a third bolt hole 39e is formed in the outer peripheral wall 39a and the front wall 39b. The third bolt hole 39e penetrates the outer peripheral wall 39a and the front wall 39b in the direction of the drive shaft center O1. Moreover, although not shown in the figure, multiple third bolt holes 39e are formed in the outer peripheral wall 39a and the front wall 39b. Figure 1 The middle figure shows one of the multiple third bolt holes 39e.

[0125] The housing 39 abuts against the rear surface of its outer peripheral wall 39a with 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, simultaneously engaging the second bolts 34b with the drive peripheral wall 35. Thus, in the drive vortex member 30, the housing 39 is fixed to the drive peripheral wall 35.

[0126] Thus, the housing 39 is fixed to the drive peripheral wall 35, 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.

[0127] The driven scroll member 40 is also made of aluminum alloy. The driven scroll member 40 has a driven end plate 41 and a driven scroll body 43.

[0128] 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.

[0129] 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 about the driven axis O2, facing forward from the third rear surface 412 of the driven end plate 41. Thus, the receiving recess 15 faces the rear of the driven end plate 41 and further faces the first diameter portion 641 of the protrusion 64.

[0130] like Figure 2 As shown, a driven shaft portion 16 is 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 a sliding bearing 13. 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 offset from the center of the bushing 53, i.e., from the driven shaft center O2. The driven pin 55 protrudes rearward from the bushing 53 and further from the driven end plate 41.

[0131] Additionally, a rotation-stopping pin 21 is fixed to the driven end plate 41 at the location opposite to the ring 22. The rotation-stopping pin 21 protrudes rearward from the third rear surface 412. Furthermore, six rotation-stopping pins 21 are fixed to the driven end plate 41 in the same number as the rings 22. Figures 1-3 The figure shows one of the six rotation-stopping pins 21.

[0132] Furthermore, these rotation-stopping pins 21 and rings 22 constitute the driven mechanism 20. Here, the number of rotation-stopping pins 21 and rings 22 can be appropriately designed as long as there are 3 or more of them.

[0133] like Figure 1 As shown, the driven scroll body 43 is integral with the driven end plate 41 and extends forward parallel to the drive shaft O1 and the driven shaft O2 from the third front surface 411 of the driven end plate 41. The driven scroll body 43 has the center of the scroll on the central side of the driven end plate 41 as the scroll center and extends outward in a scroll shape from the scroll center.

[0134] In this compressor, a driven scroll member 40 is housed within the drive scroll member 30, more specifically, in the portion of the drive scroll member 30 between the drive scroll body 33, the drive peripheral wall 35, and the housing 37. 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 face each other to form a compression chamber 12.

[0135] Furthermore, an intake portion 30a is formed between the driving peripheral wall 35 and the driven vortex member 40. That is, the driving vortex body 33 and the driven vortex body 43 are located within the intake portion 30a. The intake portion 30a is separated from the vortex chamber 65 by the driving peripheral wall 35 and the cover 37, and is also separated from the discharge chamber 14 by the driving end plate 31. In addition, the intake portion 30a communicates with the intake port 374. Thus, the intake portion 30a communicates with the receiving portion 38 through the intake port 374.

[0136] Furthermore, by housing the driven scroll member 40 within the driving scroll member 30, the second front surface 371 of the wall portion 37a and the third rear surface 412 of the driven end plate 41 face each other in the direction of the drive axis O1. Additionally, each rotation stop pin 21 enters into each ring 22. Thus, the driving scroll member 30 and the driven scroll member 40 are assembled together in the front-rear direction, forming the scroll compression section 100. Moreover, strictly speaking, after the driving scroll body 33 and the driven scroll body 43 engage and their respective rotation stop pins 21 enter into each ring 22, the cover 37 in the driving scroll member 30 is fixed to the drive peripheral wall 35 and the rotor 11.

[0137] Furthermore, by assembling the drive scroll member 30 and the driven scroll member 40 together, the receiving recess 15 of the driven end plate 41 and the driven shaft portion 16 become the recess 373 facing the cover 37.

[0138] like Figure 2 As shown, the drive scroll member 30 is positioned forward of the stator core 17a within the scroll chamber 65. Furthermore, in the drive scroll member 30, the inner cylindrical portion 37b of the cover 37 is inserted into the inner circumference of the first coil end 171. In this state, the first radial ball bearing 51 is inserted into the inner cylindrical portion 37b. Thus, the inner cylindrical portion 37b, and consequently the cover 37, are supported by the first radial ball bearing 51 relative to the first radial portion 641 of the protrusion 64 in a manner that allows rotation about the drive axis O1. The receiving portion 38 communicates with the scroll chamber 65. Additionally, the front portion of the first radial portion 641 enters the insertion hole 375.

[0139] Here, the compressor chamber 12 is rotatably supported on the first diameter portion 641 by the cover 37, so that in this compressor, the compression chamber 12 is located in the direction of the drive shaft O1 ahead of the electric motor 10, including the stator core 17a. More specifically, the compression chamber 12 is located in the direction of the drive shaft O1 ahead of the electric motor 10, separated by the cover 37 and the driven end plate 41.

[0140] Furthermore, as described above, the first diameter portion 641 constitutes the front portion of the protrusion 64, and the second diameter portion 642 constitutes the rear portion of the protrusion 64. The stator core 17a is fixed to the outer peripheral surface of the second diameter portion 642. Therefore, the inner cylindrical portion 37b is rotatably supported on the first diameter portion 641 via the first radial ball bearing 51, thereby the cover 37 is rotatably supported on the protrusion 64 at a position forward of the stator core 17a. In other words, the cover 37 is supported on the protrusion 64 at a position closer to the compression chamber 12 than the stator core 17a, in a manner rotatable about the drive shaft O1.

[0141] Furthermore, the inner cylindrical portion 37b, which enters the inner circumferential side of the first coil end 171, faces the second radial portion 642 in the direction of the drive axis O1. Here, with the cover 37 supported on the protrusion 64 in a rotatable manner, the inner cylindrical portion 37b and the first coil end 171 are radially spaced apart from each other in the cover 37.

[0142] Furthermore, by supporting the cover 37 rotatably on the protrusion 64, the wall portion 37a of the cover 37 faces the first coil end 171 from the front. Moreover, the outer cylindrical portion 37d of the cover 37 is located radially outside the first coil end 171. At this time, the outer cylindrical portion 37d and the first coil end 171 are radially spaced apart from each other in the cover 37. In other words, by supporting the cover 37 rotatably on the protrusion 64, the first coil end 171 is housed within the housing portion 38.

[0143] Furthermore, in this compressor, with the housing 37 rotatably supported on the protrusion 64, a first radial portion 641, a first radial ball bearing 51, an inner cylinder portion 37b, a first coil end portion 171, and an outer cylinder portion 37d are sequentially arranged radially from the drive shaft center O1 side outwards on the housing 37. Moreover, these components—the first radial portion 641, the first radial ball bearing 51, the inner cylinder portion 37b, the first coil end portion 171, and the outer cylinder portion 37d—are arranged overlapping radially.

[0144] In addition, such as Figure 1As shown, in the drive scroll member 30, the protrusion 39d of the housing 39 is inserted into the second radial ball bearing 52 and the shaft seal member 63. Thus, the protrusion 39d is supported relative to the support portion 66 via the second radial ball bearing 52 and the second elastic body 67b in a manner rotatable about the drive axis O1. In this way, the drive scroll member 30, while disposed within the scroll chamber 65, is supported on the housing 6 in a manner rotatable about the drive axis O1 by both the protrusion 64 and the support portion 66.

[0145] Furthermore, the housing 39 is supported by the support portion 66, thereby positioning the discharge passage 390 to face the discharge port 69 from the rear. Thus, the discharge chamber 14 and the discharge port 69 are connected via the discharge passage 390. Moreover, the discharge passage 390 and the discharge port 69 are sealed to the vortex chamber 65 by the shaft seal member 63.

[0146] On the other hand, in the driven scroll member 40, the driven pin 55 of the driven shaft portion 16 is inserted into the pin hole 4. Thus, while the driven scroll member 40 is disposed within the scroll chamber 65, it is supported relative to the first diameter portion 641 in a manner rotatable about the driven axis O2. Furthermore, by being rotatably supported in the first diameter portion 641 in this manner, the driven scroll member 40 is also rotatably supported on the protrusion 64 at a position forward of the stator core 17a. That is, the driven scroll member 40 is supported on the protrusion 64 at a position closer to the compression chamber 12 than the stator core 17a, in a manner rotatable about the driven axis O2. Moreover, by inserting the driven pin 55 into the pin hole 4, the driven scroll member 40 is supported on the first diameter portion 641 at a position radially inward of the cover 37 than the inner cylinder portion 37b, in a manner rotatable about the driven axis O2. Furthermore, unlike the driving scroll member 30, the driven scroll member 40 is supported on the housing 6 by means of the protrusion 64 in a manner that allows it to rotate about the driven axis O2.

[0147] 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.

[0148] In the compressor configured as described above, such as Figure 1 as well as Figure 2As shown by the dashed arrow, the low-temperature, low-pressure refrigerant after passing through the evaporator is drawn into the scroll chamber 65 through the suction port 68. Furthermore, if the electric motor 10 operates and the rotor 11 rotates, the rotation of the rotor 11 is transmitted to the drive scroll member 30. Therefore, within the scroll chamber 65, the drive scroll member 30 rotates around the drive shaft O1. In other words, the drive scroll member 30 rotates integrally with the rotor 11. At this time, in the driven mechanism 20, each rotation stop pin 21 slides in contact with the inner circumferential surface of each ring 22 while causing each ring 22 to rotate relative to the center of its respective rotation stop pin 21. In this way, the driven mechanism 20 transmits the torque of the drive scroll member 30 to the driven scroll member 40.

[0149] As a result, the driven scroll member 40 rotates around the driven axis O2 by driving the scroll member 30 and the driven mechanism 20. At this time, the driven mechanism 20 restricts the rotation of the driven scroll member 40. Thus, the driven scroll member 40 revolves relative to the driving scroll member 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.

[0150] In addition, the refrigerant drawn into the vortex chamber 65, such as Figure 1 as well as Figure 2 As 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 into the receiving section 38 through the gaps formed in the stator core 17a. Furthermore, the refrigerant drawn into the scroll chamber 65 also flows into the receiving section 38 through the gaps between the slots (not shown) formed in the receiving winding 17b of the stator core 17a and the winding 17b. In this way, the refrigerant in the receiving section 38 is drawn into the compression chamber 12 from the suction port 374 via the suction section 30a.

[0151] Furthermore, the compression chamber 12 compresses the refrigerant by reducing its volume while simultaneously enclosing it within itself through the driven rotation of the driven scroll member 30 and the driven rotation of the driven scroll member 40. As a result, the high-pressure refrigerant, compressed to the discharge pressure, is discharged from the discharge port 32 to the discharge chamber 14, and then discharged to the outside of the compressor via the discharge passage 390 and the discharge connection port 69. At this time, the discharge passage 390 and the discharge connection port 69 are sealed to the scroll chamber 65 by the shaft seal member 63, thus preventing refrigerant flowing from the discharge passage 390 to the discharge connection port 69 from entering the scroll chamber 65.

[0152] In this compressor, the stator core 17a is fixed to the second diameter portion 642 of the protrusion 64. Therefore, in this compressor, during operation, the torque variation of the electric motor 10 associated with the compression of the refrigerant in the compression chamber 12 is inevitably transmitted from the stator core 17a to the protrusion 64.

[0153] Furthermore, in this compressor, the inner cylindrical portion 37b of the casing 37 is rotatably supported on the first diameter portion 641 of the protrusion 64. Therefore, during operation, torque fluctuations in the drive scroll 30 associated with the compression of the refrigerant in the compression chamber 12 are inevitably transmitted to the protrusion 64. Moreover, in this compressor, the driven scroll 40 is also rotatably supported on the first diameter portion 641; therefore, during operation, torque fluctuations in the driven scroll 40 associated with the compression of the refrigerant in the compression chamber 12 are also inevitably transmitted to the protrusion 64. Furthermore, due to these torque fluctuations transmitted to the protrusion 64, a torque that twists the direction of the protrusion 64 acts on the protrusion 64.

[0154] In this compressor, since the refrigerant is compressed by the rotation of both the driving scroll 30 and the driven scroll 40, the phase of the torque variation transmitted from the driving scroll 30 and the driven scroll 40 to the protrusion 64 during operation is opposite to the phase of the torque variation of the electric motor 10 transmitted from the stator core 17a to the protrusion 64. Therefore, in this compressor, at the protrusion 64, the torque variation transmitted from the stator core 17a to the protrusion 64 cancels out the torque variation transmitted from the driving scroll 30 and the driven scroll 40 to the protrusion 64. Thus, in this compressor, the torque variation transmitted to the protrusion 64 during operation can be reduced. Consequently, in this compressor, the torque acting on the protrusion 64 can be reduced.

[0155] Furthermore, in this compressor, the protrusion 64 is a component independent of the first outer casing 61, which includes the retaining part 611. The protrusion 64 is mounted on the first outer casing 61 by means of a clearance fit between the retaining part 611 and the protrusion 64. Therefore, the torque variation transmitted from the stator core 17a, the drive scroll member 30, and the driven scroll member 40 to the protrusion 64, and the torque acting on the protrusion 64, is difficult to transmit to the first outer casing 61.

[0156] Therefore, in this compressor, the torque transmitted from the protrusion 64 to the first outer casing 61 can be minimized as much as possible. As a result, in this compressor, the vibration of the first outer casing 61, and thus the outer casing 6, due to torque during operation can be appropriately suppressed.

[0157] Furthermore, since the torque transmitted to the housing 6 can be reduced in this way, it is not necessary to excessively increase the rigidity of the housing body 60 and the first and second housing covers 61 and 62 when suppressing vibration of the housing 6 during operation in this compressor. Therefore, it is difficult to make the housing 6 large in this compressor.

[0158] Therefore, the compressor of Example 1 has excellent quietness and can suppress large size.

[0159] In particular, in this compressor, the inner cylindrical portion 37b of the casing 37 is rotatably supported on the first radial portion 641 via the first radial ball bearing 51. Therefore, in this compressor, the torque variation inevitably transmitted from the drive scroll member 30 to the protrusion 64 can be appropriately reduced by the first radial ball bearing 51.

[0160] Furthermore, in this compressor, the protrusion 39d of the housing 39 is rotatably supported on the support 66 via the second radial ball bearing 52. Therefore, although torque variations driving the scroll member 30 are inevitably transmitted to the support 66 and further to the second outer casing 62 via the protrusion 39d, the torque variations transmitted from the protrusion 39d to the support 66 can be appropriately reduced by the second radial ball bearing 52. Thus, although a torque inevitably acts on the protrusion 39d during operation, the torque transmitted from the protrusion 39d to the outer casing 62 can be reduced. Therefore, vibration of the second outer casing 62 can also be appropriately suppressed in this compressor.

[0161] Furthermore, in this compressor, a first elastic body 67a is provided between the second radial portion 642 of the protrusion 64 and the retaining portion 611, and a second elastic body 67b is provided between the supporting portion 66 and the second radial ball bearing 52. Thus, by undergoing elastic deformation, the first elastic body 67a can appropriately suppress the transmission of torque acting on the protrusion 64 from the protrusion 64 to the retaining portion 611 and further to the first outer casing 61. Similarly, by undergoing elastic deformation, the second elastic body 67b can appropriately suppress the transmission of torque acting on the protrusion 39d from the second radial ball bearing 52 to the supporting portion 66 and further to the second outer casing 62. In this respect, the outer casing 6 is also less prone to vibration in this compressor.

[0162] Furthermore, the first elastic body 67a and the stator core 17a are in Figure 2The area X1 shown overlaps radially with the housing 6. That is, when the first elastic body 67a is held between the retaining part 611 and the second radial portion 642 of the protrusion 64, a portion of itself overlaps radially with the stator core 17a in the housing 6. Thus, compared to the case where the first elastic body 67a is arranged spaced apart from the stator core 17a in the drive shaft O1 direction, ensuring the length of the first elastic body 67a in the drive shaft O1 direction and ensuring the contact area between the retaining part 611 and the protrusion 64 and the first elastic body 67a, it is possible to appropriately suppress the increase in the size of the compressor in the drive shaft O1 direction while ensuring the length of the first elastic body 67a in the drive shaft O1 direction.

[0163] Furthermore, in this compressor, the housing 37 and the driven scroll member 40 are rotatably supported on the first diameter portion 641 of the protrusion 64. Thus, in this compressor, the housing 37 and the driven scroll member 40 can be appropriately supported on the protrusion 64 at a position closer to the compression chamber 12 than the stator core 17a.

[0164] Furthermore, in this compressor, by inserting the driven pin 55 of the driven shaft portion 16 into the pin hole 4, the driven scroll member 40 is supported on the first radial portion 641 in a position radially inward of the housing 37 compared to the inner cylinder portion 37b, in a manner that allows it to rotate around the driven axis O2. Additionally, in this compressor, the stator core 17a, the first radial ball bearing 51, and the bushing 53 of the driven shaft portion 16 are sequentially arranged from the first housing cover 61 side toward the compression chamber 12 in the direction of the drive axis O1. Furthermore, in this compressor, the driven pin 55, the first radial portion 641, the first radial ball bearing 51, the inner cylinder portion 37b, the first coil end 171, and the outer cylinder portion 37d are arranged overlapping radially of the housing 37. Therefore, in this compressor, the enlargement of the housing 6 in the direction of the drive axis O1 can be appropriately suppressed.

[0165] Furthermore, in this compressor, the second diameter portion 642 of the protrusion 64 is formed to have a diameter larger than that of the retaining portion 611. Therefore, by allowing the retaining portion 611 to enter the interior of the second diameter portion 642, the rigidity of the protrusion 64 can be adequately ensured by the second diameter portion 642 and the retaining portion 611. Moreover, since the diameter of the first diameter portion 641 in the protrusion 64 is smaller than that of the second diameter portion 642, the compressor can suppress the enlargement of the first radial ball bearing 51 and the inner cylinder portion 37b.

[0166] Furthermore, in this compressor, as the refrigerant in the scroll chamber 65 is drawn into the suction port 374, the stator 17 and rotor 11 can be adequately cooled by the refrigerant. In particular, in this compressor, since the first coil end 171 is disposed in the housing 38, the first coil end 171 can be sufficiently cooled by the refrigerant reaching the housing 38.

[0167] (Example 2)

[0168] like Figure 3 As shown, in the compressor of Embodiment 2, protrusion 71 is installed on the first outer casing 61 instead of protrusion 64. Furthermore, in this compressor, the elastomer 67 is made only of the second elastomer 67b (see...). Figure 1 )constitute.

[0169] In addition, such as Figure 3 As shown, in this compressor, a retaining portion 612 is formed for the first outer casing 61 instead of the retaining portion 611. The retaining portion 612 protrudes forward in a cylindrical shape from the center of the front surface 61a of the first outer casing 61 in the direction of the drive shaft O1. The length of the outer diameter of the retaining portion 612 is formed as a second length L2. In addition, a plurality of fitting holes 612b are formed on the front end face 612a of the retaining portion 612.

[0170] The protrusion 71 is formed as a component independent of the first outer casing 61. The protrusion 71 is made of steel and is a solid cylinder. The protrusion 71 consists of a first diameter portion 711 and a second diameter portion 712. The first diameter portion 711 forms the front part of the protrusion 71. The first diameter portion 711 has the same configuration as the first diameter portion 641 in the compressor of Embodiment 1. Therefore, the length of the outer diameter of the first diameter portion 711 is formed as a first length L1. Furthermore, a pin hole 4 is formed in the first diameter portion 711.

[0171] The second diameter portion 712 forms the rear part of the protrusion 71 and is integral with the first diameter portion 711. The length of the outer diameter of the second diameter portion 712 is formed as a second length L2. Thus, the second diameter portion 712 is formed with a diameter larger than that of the first diameter portion 711. In addition, the diameter of the second diameter portion 712 is formed to be the same as that of the retaining portion 612.

[0172] The second diameter portion 712 is fixed with the same number of connecting pins 71c as the aforementioned fitting holes 612b. Each connecting pin 71c is fixed to the second diameter portion 712 in a manner that protrudes rearward from the rear end face 713. Furthermore, the number of fitting holes 612b and connecting pins 71c can be appropriately designed.

[0173] In the protrusion 71, by engaging each connecting pin 71c with each engaging hole 612b, the protrusion 71 is fixed to the retaining part 612 while simultaneously positioning the retaining part 612 and the protrusion 71. Thus, in this compressor, the protrusion 71 is mounted on the first outer casing 61, and the first outer casing 61 supports the protrusion 71. Furthermore, the protrusion 71 protrudes forward beyond the retaining part 612 within the vortex chamber 65.

[0174] Furthermore, in this compressor, a stator core 17a is fixed at the second diameter portion 712. The inner cylindrical portion 37b of the casing 37 is supported relative to the first diameter portion 711 via a first radial ball bearing 51 in a manner rotatable about the drive axis O1. The driven scroll member 40 is also supported relative to the first diameter portion 711 in a manner rotatable about the driven axis O2. Thus, in this compressor, the casing 37 and the driven scroll member 40 are also rotatably supported on the protrusion 71 at a position forward of the stator core 17a. The other components of this compressor are the same as those in Embodiment 1; the same reference numerals are used for the same components, and detailed descriptions related to the components are omitted.

[0175] Similar to the compressor of Embodiment 1, in this compressor, at the protrusion 71, the torque variation transmitted from the stator core 17a to the protrusion 71 cancels out the torque variation transmitted from the drive scroll member 30 and the driven scroll member 40 to the protrusion 71. Therefore, the torque variation transmitted from the stator core 17a, the drive scroll member 30, and the driven scroll member 40 to the protrusion 71, and consequently the torque acting on the protrusion 71, is difficult to transmit to the holding portion 612 and, consequently, to the first outer casing 61. Furthermore, since the protrusion 71 is a component independent of the holding portion 612, compared to the case where the protrusion 71 is integrally formed in the holding portion 612, i.e., integrally formed in the first outer casing 61, the torque acting on the protrusion 71 is difficult to transmit to the first outer casing 61. Thus, in this compressor, the same function as the compressor of Embodiment 1 can be achieved.

[0176] (Example 3)

[0177] like Figure 4 As shown, in the compressor of Embodiment 3, the outer casing 6 has a first outer casing cover 81 instead of the first outer casing cover 61. The first outer casing cover 81 is also an example of the "first wall" in this invention. Thus, in this compressor, the outer casing 6 consists of the outer casing body 60, the first outer casing cover 81, and the second outer casing cover 62 (see reference). Figure 1 The outer casing 60, the first outer casing 81, and the second outer casing 62 are similar to those in the compressor of Embodiment 1, and are fixed in the direction of the drive shaft O1, thereby forming a vortex chamber 65 inside the outer casing 6.

[0178] In addition, such as Figure 4 As shown, in this compressor, a protrusion 73 is provided within the scroll chamber 65. Furthermore, in this compressor, the elastic body 67 consists of a first elastic body 67c and a second elastic body 67b (see reference...). Figure 1 )constitute.

[0179] Figure 4 The first housing cover 81 shown is made of aluminum alloy. The first housing cover 81 is located at the rear end of the housing body 60. The first housing cover 81 is generally disk-shaped, centered on the drive shaft O1, and extends radially along the housing 6. The first housing cover 81 has a front surface 81a facing forward and a rear surface 81b located opposite the front surface 81a and facing rearward. Alternatively, the first housing cover 81 may be made of steel.

[0180] Furthermore, a plurality of fitting holes 810 are formed in the first outer casing 81. A first engaging pin 811 is inserted into and fixed in each fitting hole 810. At this time, each first engaging pin 811 is fixed in the fitting hole 810 with its protrusion forward compared to the front surface 81a.

[0181] The first elastomer 67c is formed of synthetic rubber. The first elastomer 67c is formed in the shape of a disk with a predetermined thickness in the direction of the drive shaft O1. More specifically, the first elastomer 67c is formed in the shape of a disk with a diameter approximately the same as the diameter of the flange portion 733 of the protrusion 73 described later. The first elastomer 67c is mounted on the first housing cover 81 in a state of abutment against the front surface 81a of the first housing cover 81 by inserting each of the first engaging pins 811. Thus, the first housing cover 81 holds the first elastomer 67c. Furthermore, the first elastomer 67c is disposed within the vortex chamber 65 at a position further forward than the first housing cover 81. Moreover, the material and thickness of the first elastomer 67c can be appropriately designed.

[0182] The protrusion 73 is formed as a component independent of the first outer casing 81. The protrusion 73 is made of steel and is a solid cylinder. The protrusion 73 is composed of a first diameter portion 731, a second diameter portion 732, and a flange portion 733. The first diameter portion 731 forms the front part of the protrusion 73. The first diameter portion 731 has the same configuration as the first diameter portion 641 in the compressor of Embodiment 1. Therefore, the length of the outer diameter of the first diameter portion 731 is formed as a first length L1. Furthermore, a pin hole 4 is formed in the first diameter portion 731.

[0183] The second diameter portion 732 is located behind the first diameter portion 731 and is integral with it. Thus, the second diameter portion 732 constitutes the central portion of the protrusion 73. The length of the outer diameter of the second diameter portion 732 is formed as a second length L2. Therefore, the second diameter portion 732 is formed with a diameter larger than that of the first diameter portion 731. The flange portion 733 is located behind the second diameter portion 732 and is integral with it. Thus, the flange portion 733 constitutes the rear portion of the protrusion 73. The flange portion 733 is formed with a diameter larger than that of the second diameter portion 732.

[0184] The protrusion 73 is positioned in front of the first elastic body 67c, causing the flange portion 733 to abut against the first elastic body 67c in the direction of the drive shaft O1. Furthermore, the protrusion 73 is mounted on the first elastic body 67c by inserting a plurality of second engaging pins 734 through the flange portion 733 and the first elastic body 67c. At this time, in the first elastic body 67c, each first engaging pin 811 and each second engaging pin 734 are spaced apart in the direction of the drive shaft O1 without abutting. Thus, the protrusion 73 is mounted on the first housing cover 81 via the first elastic body 67c. Consequently, in this compressor, the first housing cover 81 supports the protrusion 73 via the first elastic body 67c.

[0185] Furthermore, in this compressor, the stator core 17a is fixed at the second diameter portion 732. Moreover, the inner cylindrical portion 37b of the casing 37 is supported relative to the first diameter portion 731 via a first radial ball bearing 51 in a manner rotatable about the drive axis O1. Furthermore, the driven scroll member 40 is supported relative to the first diameter portion 731 in a manner rotatable about the driven axis O2. Thus, in this compressor, the casing 37 and the driven scroll member 40 are also rotatably supported on the protrusion 73 at a position forward of the stator core 17a. The other components of this compressor are the same as those of the compressor in Embodiment 1.

[0186] In this compressor, at the protrusion 73, the torque variation transmitted from the stator core 17a to the protrusion 73 cancels out the torque variation transmitted from the drive scroll member 30 and the driven scroll member 40 to the protrusion 73. Furthermore, the protrusion 73 is a component independent of the first outer casing 81, and it is mounted to the first outer casing 81 with the first elastic body 67c in a state of separation. Therefore, in this compressor, elastic deformation occurs between the protrusion 73 and the first outer casing 81 via the first elastic body 67c, thereby appropriately absorbing the torque variation acting on the protrusion 73, and consequently, the torque acting on the protrusion 73. Thus, in this compressor, the torque acting on the protrusion 73 is difficult to transmit to the first outer casing 81, and the casing 6 is less prone to vibration. Other functions in this compressor are the same as those in the compressor of Embodiment 1.

[0187] (Example 4)

[0188] like Figure 5 As shown, in the compressor of Embodiment 4, the protrusion 73 in the compressor of Embodiment 3 is replaced, and the protrusion 74 is disposed in the scroll chamber 65. Furthermore, in this compressor, the elastic body 67 consists of a first elastic body 67d and a second elastic body 67b (see...). Figure 1 )constitute.

[0189] like Figure 5 As shown, the first elastomer 67d is formed of synthetic rubber. The first elastomer 67d is composed of a large-diameter portion 671 and a small-diameter portion 672. The large-diameter portion 671 is formed as a disk shape having a predetermined plate thickness in the direction of the drive shaft center O1. More specifically, the large-diameter portion 671 is formed as a disk shape with a diameter approximately the same as the diameter of the flange portion 743 of the protrusion 74 described later. The small-diameter portion 672 is integrally formed from the large-diameter portion 671. The small-diameter portion 672 is formed with a diameter smaller than that of the large-diameter portion 671 and extends forward in a cylindrical shape from the large-diameter portion 671 in the direction of the drive shaft center O1.

[0190] Each first engaging pin 811 is inserted into the large-diameter portion 671, thereby mounting the first elastic body 67d to abut against the front surface 81a of the first housing cover 81. Thus, the first housing cover 81 holds the first elastic body 67d. Furthermore, the first elastic body 67d is positioned in the vortex chamber 65 at a position further forward than the first housing cover 81. In addition to the plate thickness of the large-diameter portion 671 and the length in the direction of the drive shaft O1 of the small-diameter portion 672, the material of the first elastic body 67d can also be appropriately designed.

[0191] The protrusion 74 is formed as a component independent of the first outer casing 81. The protrusion 74 is made of steel. The protrusion 74 is composed of a first diameter portion 741, a second diameter portion 742, and a flange portion 743. The first diameter portion 741 forms the front part of the protrusion 74. The first diameter portion 741 has the same configuration as the first diameter portion 641 in the compressor of Embodiment 1. Therefore, the length of the outer diameter of the first diameter portion 741 is formed as a first length L1. Furthermore, a pin hole 4 is formed in the first diameter portion 741.

[0192] The second diameter portion 742 is formed as a bottomed cylindrical shape with an opening at the rear. The length of the outer diameter of the second diameter portion 742 is formed as a second length L2. Thus, the diameter of the second diameter portion 742 is larger than the diameter of the first diameter portion 741. In addition, the inner diameter of the second diameter portion 742 is slightly smaller than the outer diameter of the small diameter portion 672 of the first elastomer 67d.

[0193] The flange portion 743 is located behind the second diameter portion 742 and is integral with it. Thus, the flange portion 743 constitutes the rear portion of the protrusion 74. The flange portion 743 is formed as an annular shape with a diameter larger than that of the second diameter portion 732. Furthermore, the inner diameter of the flange portion 743 is the same as that of the second diameter portion 742. Therefore, the inner diameter of the flange portion 743 is also slightly smaller than the outer diameter of the small diameter portion 672 of the first elastic body 67d.

[0194] The protrusion 74 allows the small-diameter portion 672 of the first elastic body 67d to pass through the flange portion 743 and the second diameter portion 742. At this time, the inner diameters of the flange portion 743 and the second diameter portion 742 are slightly smaller than the outer diameter of the small-diameter portion 672. Therefore, the small-diameter portion 672 is inserted into the flange portion 743 and the second diameter portion 742 in a state of slight diameter reduction through elastic deformation. Furthermore, the protrusion 74 causes the flange portion 743 to abut against the large-diameter portion 671 of the first elastic body 67d in the direction of the drive shaft O1. In this way, the protrusion 74 is mounted on the first outer casing 81 via the first elastic body 67d. As a result, in this compressor, the first outer casing 81 supports the protrusion 74 via the first elastic body 67d. Additionally, at this time, the first elastic body 67d retains the protrusion 74 from within the protrusion 74 through the small-diameter portion 672.

[0195] Furthermore, in this compressor, a stator core 17a is fixed to the outer peripheral surface of the second diameter portion 742. Moreover, the inner cylindrical portion 37b of the casing 37 is supported relative to the first diameter portion 741 via a first radial ball bearing 51 in a manner rotatable about the drive axis O1. Furthermore, the driven scroll member 40 is supported relative to the first diameter portion 741 in a manner rotatable about the driven axis O2. Thus, in this compressor, the casing 37 and the driven scroll member 40 are also rotatably supported on the protrusion 74 at a position forward of the stator core 17a. The other components of this compressor are the same as those of the compressor in Embodiment 3.

[0196] In this compressor, at the protrusion 74, the torque variation transmitted from the stator core 17a to the protrusion 74 cancels out the torque variation transmitted from the drive scroll member 30 and the driven scroll member 40 to the protrusion 74. Furthermore, the protrusion 74 is a component independent of the first outer casing 81, and it is mounted to the first outer casing 81 with the first elastic body 67d in between. Therefore, in this compressor, elastic deformation occurs between the protrusion 74 and the first outer casing 81 via the first elastic body 67d, thereby appropriately absorbing the torque variation acting on the protrusion 74, and consequently, the torque acting on the protrusion 74. Thus, in this compressor, the torque acting on the protrusion 74 is difficult to transmit to the first outer casing 81, and the outer casing 6 is less prone to vibration.

[0197] Furthermore, in this compressor, while the small-diameter portion 672 of the first elastic body 67d is reduced in diameter through elastic deformation, it is inserted into the flange portion 743 and the second diameter portion 742. Therefore, in this compressor, it is not necessary to use multiple second engaging pins 734 to mount the protrusion 74 to the first elastic body 67d as in the compressor of Embodiment 3. Moreover, in this compressor, by inserting the small-diameter portion 672 into the flange portion 743 and the second diameter portion 742, the first elastic body 67d holds the protrusion 74 from within, thus the first outer casing 81 can properly support the protrusion 74 via the first elastic body 67d. Other functions in this compressor are the same as in the compressor of Embodiment 1.

[0198] (Example 5)

[0199] like Figure 6 As shown, in the compressor of Embodiment 5, the outer casing 6 has a first outer casing cover 83. The first outer casing cover 83 is also an example of the "first wall" in this invention. Thus, in this compressor, the outer casing 6 consists of the outer casing body 60, the first outer casing cover 83, and the second outer casing cover 62 (see reference). Figure 1 The outer casing 60, the first outer casing 83, and the second outer casing 62 are fixed in the direction of the drive shaft O1, thereby forming a vortex chamber 65 inside the outer casing 6.

[0200] In addition, such as Figure 6 As shown, in this compressor, a protrusion 75 is provided within the scroll chamber 65. Furthermore, in this compressor, the elastic body 67 is composed of a first elastic body 67e and a second elastic body 67b (see reference...). Figure 1 )constitute.

[0201] Figure 6 The first housing cover 83 shown is made of aluminum alloy. The first housing cover 83 is located at the rear end of the housing body 60. The first housing cover 83 is generally disk-shaped, centered on the drive shaft O1, and extends radially along the housing 6. The first housing cover 83 has a front surface 83a facing forward and a rear surface 83b located opposite the front surface 83a and facing rearward. Alternatively, the first housing cover 83 may be made of steel.

[0202] Additionally, a mounting recess 83c is formed in the first outer casing 83. The mounting recess 83c is cylindrically recessed from the front surface 83a toward the rear surface 83b, centered on the drive shaft O1.

[0203] The first elastomer 67e is formed of synthetic rubber. The first elastomer 67e is formed as a cylinder extending along the drive shaft center O1. More specifically, the first elastomer 67e is formed with a diameter the same as the diameter of the small diameter portion 672 of the first elastomer 67d in the compressor of Example 4.

[0204] The first elastic body 67e inserts its rear portion into the mounting recess 83c. Here, the inner diameter of the mounting recess 83c is slightly smaller than the outer diameter of the first elastic body 67e. Therefore, the first elastic body 67e is inserted into the mounting recess 83c in a state where its rear portion is slightly reduced in diameter through elastic deformation. Consequently, the first elastic body 67e is mounted on the first outer casing 83 in a state where it protrudes from the mounting recess 83c into the vortex chamber 65. That is, the first outer casing 83 holds the first elastic body 67e in a state where it protrudes from the mounting recess 83c into the vortex chamber 65. Furthermore, the material of the first elastic body 67e can be appropriately designed.

[0205] The protrusion 75 is formed as a component independent of the first outer casing 83. The protrusion 75 is made of steel. The protrusion 75 is composed of a first diameter portion 751, a second diameter portion 752, and a flange portion 753. The first diameter portion 751 has the same configuration as the first diameter portion 741 in the compressor of Embodiment 4. The second diameter portion 752 has the same configuration as the second diameter portion 742, except that it is longer in the direction of the drive shaft center O1 than the second diameter portion 742 in the compressor of Embodiment 4. The flange portion 753 has the same configuration as the flange portion 743 in the compressor of Embodiment 4. Therefore, the inner diameters of the second diameter portion 752 and the flange portion 753 are slightly smaller than the outer diameter of the first elastic body 67e.

[0206] The protrusion 75 allows the first elastic body 67e to pass through the flange portion 753 and the second diameter portion 752. At this time, the first elastic body 67e is inserted into the flange portion 753 and the second diameter portion 752 in a state of slight diameter reduction through elastic deformation. Thus, the protrusion 75 is mounted on the first housing cover 83 via the first elastic body 67e. As a result, in this compressor, the first housing cover 83 supports the protrusion 75 via the first elastic body 67e. Furthermore, with the protrusion 75 mounted on the first housing cover 83, the flange portion 753 is spaced apart from the front surface 83a of the first housing cover 83. Therefore, the protrusion 75 does not abut against the first housing cover 83. Additionally, the first elastic body 67e retains the protrusion 75 from within.

[0207] Furthermore, in this compressor, a stator core 17a is fixed to the outer peripheral surface of the second diameter portion 752. Moreover, the inner cylindrical portion 37b of the casing 37 is supported relative to the first diameter portion 751 via a first radial ball bearing 51 in a manner rotatable about the drive axis O1. Furthermore, the driven scroll member 40 is supported relative to the first diameter portion 751 in a manner rotatable about the driven axis O2. Thus, in this compressor, the casing 37 and the driven scroll member 40 are also rotatably supported on the protrusion 75 at a position forward of the stator core 17a. The other components of this compressor are the same as those of the compressor in Embodiment 1.

[0208] In this compressor, at the protrusion 75, the torque variation transmitted from the stator core 17a to the protrusion 75 cancels out the torque variation transmitted from the drive scroll member 30 and the driven scroll member 40 to the protrusion 75. Furthermore, the protrusion 75 is a component independent of the first outer casing 83, and it is mounted to the first outer casing 83 with the first elastic body 67e as a barrier. Therefore, in this compressor, the first elastic body 67e undergoes elastic deformation, thereby appropriately absorbing the torque variation acting on the protrusion 75, and consequently, the torque acting on the protrusion 75. Thus, in this compressor, the torque acting on the protrusion 75 is difficult to transmit to the first outer casing 83, and the outer casing 6 is less prone to vibration.

[0209] Furthermore, in this compressor, while the first elastic body 67e is reduced in diameter through elastic deformation, it is inserted into the mounting recess 83c, the flange portion 743, and the second diameter portion 742, respectively. Therefore, unlike the compressor of Embodiment 3, this compressor does not require multiple first and second engaging pins 811 and 734 to mount the first elastic body 67e to the protrusion 75 and the first outer casing 83. Moreover, in this compressor, by inserting the first elastic body 67e into the flange portion 753 and the second diameter portion 752, the first elastic body 67e is retained from inside the protrusion 75. Thus, the first outer casing 83 can properly support the protrusion 75 by means of the first elastic body 67e. Other functions in this compressor are the same as in the compressor of Embodiment 1.

[0210] The present invention has been described above based on embodiments 1 to 5, but the present invention is not limited to the above embodiments 1 to 5, and can of course be applied with appropriate modifications without departing from its spirit.

[0211] For example, in the compressor of Embodiment 1, the first outer casing 61 has a retaining portion 611, but it is not limited to this and can also be configured such that the retaining portion 611 is omitted and the second diameter portion 642 of the protrusion 64 is connected to the first outer casing 61. The same applies to the compressor of Embodiment 2.

[0212] Furthermore, in the compressor of Embodiment 1, the retaining portion 611 is integrally formed on the first outer casing 61. However, it is not limited to this, and it can also be configured such that the retaining portion 611 and the first outer casing 61 are formed separately, and the retaining portion 611 is fixed to the first outer casing 61. In this case, it is also easy to form the retaining portion 611 and the first outer casing 61 with different materials. The same applies to the compressor of Embodiment 2.

[0213] Furthermore, in the compressor of Embodiment 1, the first diameter portion 641 and the second diameter portion 642 of the protrusion 64 are integrally formed. However, it is not limited to this, and it can also be configured such that the first diameter portion 641 and the second diameter portion 642 are formed separately, and the first diameter portion 641 is fixed to the second diameter portion 642. The same applies to the compressors of Embodiments 2 to 5.

[0214] Furthermore, in the compressors of Embodiments 1 and 2, the outer casing 6 is composed of an outer casing body 60, a first outer casing cover 61, and a second outer casing cover 62. However, it is not limited to this; as long as it has the "peripheral wall," "first wall," and "second wall" as described in this invention, the outer casing 6 can also have other configurations. The same applies to the compressors of Embodiments 3 to 5.

[0215] Furthermore, in the compressor of Embodiment 1, the first elastomer 67a and the second elastomer 67b may be omitted. The same applies to the second elastomer 67b in the compressor of Embodiment 2.

[0216] Alternatively, in the compressor of Embodiment 2, an elastomer may be provided between the front end face 612a of the retaining part 612 and the rear end face 713 of the protrusion 71.

[0217] Furthermore, in the compressor of Embodiment 3, a stator core 17a is fixed to the second diameter portion 732 of the protrusion 73, more specifically, to the outer peripheral surface of the second diameter portion 732. However, it is not limited to this, and it can also be configured such that while the stator core 17a is disposed on the outer peripheral surface of the second diameter portion 732, the stator core 17a is fixed to the flange portion 733 using pins, bolts, or the like. Similarly, the compressor of Embodiment 4 can also be configured such that while the stator core 17a is disposed on the outer peripheral surface of the second diameter portion 742, the stator core 17a is fixed to the flange portion 743 using pins, bolts, or the like. Furthermore, the compressor of Embodiment 5 can also be configured such that while the stator core 17a is disposed on the outer peripheral surface of the second diameter portion 752, the stator core 17a is fixed to the flange portion 753 using pins, bolts, or the like.

[0218] Alternatively, in the compressors of embodiments 1 to 5, the following configuration may be adopted: while omitting the formation of the outer cylinder portion 37d in the cover 37, the rotor 11 is formed extending along the direction of the drive shaft O1 and the rotor 11 is connected to the wall portion 37a.

[0219] In addition, in the compressors of Examples 1 to 5, a return path may be formed for the lubricating oil contained in the refrigerant discharged to the discharge chamber 14 to flow back to the first radial ball bearing 51 and the like to lubricate the first radial ball bearing 51 and the like.

[0220] In addition, in the compressors of Examples 1 to 5, an intake passage that connects the vortex chamber 65 and the intake section 30a may be formed at the intake port 374 for the drive peripheral wall 35, etc.

[0221] In addition, the following inventions are included in this specification.

[0222] (Note 1)

[0223] A dual-rotary scroll compressor comprises a housing, a driving scroll component, a driven scroll component, a driving mechanism, and a driven mechanism.

[0224] The housing has a scroll chamber that houses the driving scroll member, the driven scroll member, and the driving mechanism.

[0225] The drive mechanism has a stator and a rotor that covers the stator from the outside and is driven to rotate by the stator.

[0226] The stator has a stator core supported by the housing.

[0227] The driving scroll component is driven to rotate around the driving shaft via the driving mechanism.

[0228] The driven scroll member is eccentric relative to the driving scroll member and rotates driven about the driven axis via the driving scroll member and the driven mechanism.

[0229] The driving scroll member and the driven scroll member form a compression chamber that compresses the fluid through the driving rotation and the driven rotation.

[0230] Its features are,

[0231] A protrusion is provided in the vortex chamber. The protrusion is fixed to the stator core and extends toward the driving vortex member and the driven vortex member in the direction of the drive shaft.

[0232] The driving vortex component has a cover that is driven to rotate by the rotor.

[0233] The cover is supported on the protrusion in a position relative to the stator core on the compression chamber side in the direction of the drive shaft, in a manner that allows it to rotate about the drive shaft.

[0234] The driven scroll member is supported on the protrusion in a position on the compression chamber side of the stator core in the direction of the drive shaft, in a manner that allows it to rotate about the driven shaft.

[0235] (Note 2)

[0236] According to Appendix 1, the dual rotary scroll compressor

[0237] The housing has: a first wall extending radially along the housing; a peripheral wall connected to the outer periphery of the first wall and extending cylindrically from the first wall in the direction of the drive shaft; and a second wall extending radially and connected to the peripheral wall on the side opposite to the first wall in the direction of the drive shaft.

[0238] The first wall supports the protrusion.

[0239] The drive scroll member has a supported body, which is located on the side opposite to the cover in the direction of the drive shaft, separated from the compression chamber.

[0240] The cover is supported on the protrusion via a first bearing in a manner that allows it to rotate about the drive shaft.

[0241] The supported body is supported on the second wall via the second bearing in a manner that allows it to rotate about the drive shaft.

[0242] (Note 3)

[0243] According to Appendix 2, the dual rotary scroll compressor

[0244] The first wall has a retaining portion extending into the vortex chamber in the direction of the drive shaft.

[0245] The protrusion engages with the retaining portion.

[0246] (Note 4)

[0247] According to Appendix 2, the dual rotary scroll compressor

[0248] A first elastic body capable of elastic deformation is provided between the protrusion and the first wall.

[0249] (Note 5)

[0250] The dual rotary scroll compressor according to any one of Appendices 2 to 4,

[0251] A second elastic body capable of elastic deformation is provided between the second bearing and the second wall.

[0252] (Note 6)

[0253] A dual-rotary scroll compressor comprises a housing, a driving scroll component, a driven scroll component, a driving mechanism, and a driven mechanism.

[0254] The housing has a scroll chamber that houses the driving scroll member, the driven scroll member, and the driving mechanism.

[0255] The drive mechanism has a stator and a rotor that covers the stator from the outside and is driven to rotate by the stator.

[0256] The stator has a stator core supported by the housing.

[0257] The driving scroll component is driven to rotate around the driving shaft via the driving mechanism.

[0258] The driven scroll member is eccentric relative to the driving scroll member and rotates driven about the driven axis via the driving scroll member and the driven mechanism.

[0259] The driving scroll member and the driven scroll member form a compression chamber that compresses the fluid through the driving rotation and the driven rotation.

[0260] Its features are,

[0261] A protrusion is provided in the vortex chamber. The protrusion is fixed to the stator core and extends toward the driving vortex member and the driven vortex member in the direction of the drive shaft.

[0262] The driving vortex component has a cover that is driven to rotate by the rotor.

[0263] The cover is supported on the protrusion in a manner that allows it to rotate about the drive axis.

[0264] The driven scroll member is supported on the protrusion in a manner that allows it to rotate about the driven axis.

[0265] The protrusion is mounted to the housing via an elastically deformable elastomer.

[0266] (Note 7)

[0267] According to Appendix 6, the dual rotary scroll compressor

[0268] The housing has: a first wall extending radially along the housing; a peripheral wall connected to the outer periphery of the first wall and extending cylindrically from the first wall in the direction of the drive shaft; and a second wall extending radially and connected to the peripheral wall on the side opposite to the first wall in the direction of the drive shaft.

[0269] The first wall provides mounting for the protrusion and holds the elastomer.

[0270] The drive scroll member has a supported body, which is located on the side opposite to the cover in the direction of the drive shaft, separated from the compression chamber.

[0271] The cover is supported on the protrusion via a first bearing in a manner that allows it to rotate about the drive shaft.

[0272] The supported body is supported on the second wall via the second bearing in a manner that allows it to rotate about the drive shaft.

[0273] (Postscript 8)

[0274] According to Appendix 7, the dual rotary scroll compressor

[0275] The first wall has a retaining portion extending into the vortex chamber in the direction of the drive shaft.

[0276] The protrusion engages with the retaining portion while simultaneously allowing the elastic body and the retaining portion to enter the interior of the protrusion.

[0277] The elastomer is disposed radially between the retaining portion and the protrusion, and is held radially by the retaining portion and the protrusion.

[0278] (Note 9)

[0279] According to Appendix 8, the dual rotary scroll compressor

[0280] The elastomer has:

[0281] A first elastic body disposed between the protrusion and the first wall; and

[0282] The second elastic body is disposed between the second bearing and the second wall.

[0283] (Postscript 10)

[0284] According to Appendix 4, the dual rotary scroll compressor

[0285] At least a portion of the first elastomer overlaps with the stator core in the radial direction.

[0286] (Postscript 11)

[0287] According to Appendix 8, the dual rotary scroll compressor

[0288] At least a portion of the elastomer overlaps with the stator core in the radial direction.

[0289] (Postscript 12)

[0290] The dual rotary scroll compressor according to any one of Appendices 1 to 11,

[0291] The protrusion has:

[0292] In the first diameter section, the cover is supported at the first diameter section via the first bearing in a manner rotatable about the drive axis, and the driven scroll member is supported at the first diameter section in a manner rotatable about the driven axis; and

[0293] The second diameter portion has a larger diameter than the first diameter portion, and the stator core is disposed on its outer circumferential surface.

[0294] The first diameter portion is located on the side of the compression chamber that is closer to the second diameter portion than the first diameter portion in the direction of the drive shaft.

[0295] (Postscript 13)

[0296] According to claim 12, the dual rotary scroll compressor,

[0297] The driven vortex member is supported on the first radial portion at a position that is radially inner than the cover, in a manner that allows it to rotate about the driven axis.

[0298] (Postscript 14)

[0299] The dual rotary scroll compressor described in Appendix 12 or 13

[0300] The driven scroll member has a driven shaft portion supported on the first radial portion.

[0301] The stator core, the first bearing, and the driven shaft are arranged sequentially from the first wall side toward the compression chamber side in the direction of the drive shaft center.

[0302] Industrial availability

[0303] This invention can be used in vehicle air conditioning systems, etc.

[0304] Explanation of reference numerals in the attached figures

[0305] 6…outer shell

[0306] 10… Electric motor (drive mechanism)

[0307] 11…rotor

[0308] 12…Compression Chamber

[0309] 16…Driven shaft section

[0310] 17…Stator

[0311] 17a…Stator core

[0312] 20…Driven mechanism

[0313] 30…Drive scroll component

[0314] 31…Driver end board

[0315] 33…Driven vortex body

[0316] 35… Drive the peripheral wall

[0317] 37…cover

[0318] 39d…Protrusion (supported part)

[0319] 40…Driven scroll component

[0320] 41…Driven end plate

[0321] 43…Driven vortex body

[0322] 51…First radial ball bearing (first bearing)

[0323] 52…Second radial ball bearing (second bearing)

[0324] 60…Outer shell (peripheral wall)

[0325] 61, 81, 83… First outer casing (first wall)

[0326] 62…Second outer shell (second wall)

[0327] 64, 71, 73, 74, 75… protruding bodies

[0328] 65… Vortex Chamber

[0329] 67…Elastomers

[0330] 67a, 67c, 67d, 67e… First elastic body

[0331] 67b…Second elastic body

[0332] 611, 612... Maintaining Department

[0333] 641, 711, 731, 741, 751...1st diameter part

[0334] 642, 712, 732, 742, 752... 2nd diameter part

[0335] O1…Drive shaft

[0336] O2…driven shaft

Claims

1. A dual-rotary scroll compressor, comprising a housing, a driving scroll component, a driven scroll component, a driving mechanism, and a driven mechanism. The housing has a scroll chamber that houses the driving scroll member, the driven scroll member, 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 by the stator. The stator has a stator core supported by the housing. The driving scroll component is driven to rotate around the driving shaft via the driving mechanism. The driven scroll member is eccentric relative to the driving scroll member and rotates driven about the driven axis via the driving scroll member and the driven mechanism. The driving scroll member and the driven scroll member form a compression chamber that compresses the fluid through the driving rotation and the driven rotation. Its features are, A protrusion is provided in the vortex chamber. The protrusion is fixed to the stator core and extends toward the driving vortex member and the driven vortex member in the direction of the drive shaft. The driving vortex component has a cover that is driven to rotate by the rotor. The cover is supported on the protrusion in a position relative to the stator core on the compression chamber side in the direction of the drive shaft, in a manner that allows it to rotate about the drive shaft. The driven scroll member is supported on the protrusion in a position relative to the stator core on the compression chamber side in the direction of the drive shaft, in a manner that allows it to rotate about the driven shaft.

2. The dual rotary scroll compressor according to claim 1, The housing has: a first wall extending radially along the housing; a peripheral wall connected to the outer periphery of the first wall and extending cylindrically from the first wall in the direction of the drive shaft; and a second wall extending radially and connected to the peripheral wall on the side opposite to the first wall in the direction of the drive shaft. The first wall supports the protrusion. The drive scroll member has a supported body, which is located on the side opposite to the cover in the direction of the drive shaft, separated from the compression chamber. The cover is supported on the protrusion via a first bearing in a manner that allows it to rotate about the drive shaft. The supported body is supported on the second wall via the second bearing in a manner that allows it to rotate about the drive axis.

3. The dual rotary scroll compressor according to claim 2, The first wall has a retaining portion that extends into the vortex chamber in the direction of the drive shaft. The protrusion engages with the retaining portion.

4. The dual rotary scroll compressor according to claim 2, A first elastic body capable of elastic deformation is provided between the protrusion and the first wall.

5. The dual rotary scroll compressor according to claim 2 or 3, A second elastic body capable of elastic deformation is provided between the second bearing and the second wall.

6. A dual-rotary scroll compressor, comprising a housing, a driving scroll component, a driven scroll component, a driving mechanism, and a driven mechanism. The housing has a scroll chamber that houses the driving scroll member, the driven scroll member, 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 by the stator. The stator has a stator core supported by the housing. The driving scroll component is driven to rotate around the driving shaft via the driving mechanism. The driven scroll member is eccentric relative to the driving scroll member and rotates driven about the driven axis via the driving scroll member and the driven mechanism. The driving scroll member and the driven scroll member form a compression chamber that compresses the fluid through the driving rotation and the driven rotation. Its features are, A protrusion is provided in the vortex chamber. The protrusion is fixed to the stator core and extends toward the driving vortex member and the driven vortex member in the direction of the drive shaft. The driving vortex component has a cover that is driven to rotate by the rotor. The cover is supported on the protrusion in a manner that allows it to rotate about the drive axis. The driven scroll member is supported on the protrusion in a manner that allows it to rotate about the driven axis. The protrusion is mounted to the housing via an elastically deformable elastomer.

7. The dual rotary scroll compressor according to claim 6, The housing has: a first wall extending radially along the housing; a peripheral wall connected to the outer periphery of the first wall and extending cylindrically from the first wall in the direction of the drive shaft; and a second wall extending radially and connected to the peripheral wall on the side opposite to the first wall in the direction of the drive shaft. The first wall provides mounting for the protrusion and holds the elastomer. The drive scroll member has a supported body, which is located on the side opposite to the cover in the direction of the drive shaft, separated from the compression chamber. The cover is supported on the protrusion via a first bearing in a manner that allows it to rotate about the drive shaft. The supported body is supported on the second wall via the second bearing in a manner that allows it to rotate about the drive axis.

8. The dual rotary scroll compressor according to claim 7, The first wall has a retaining portion that extends into the vortex chamber in the direction of the drive shaft. The protrusion engages with the retaining portion while simultaneously allowing the elastic body and the retaining portion to enter the interior of the protrusion. The elastomer is disposed radially between the retaining portion and the protrusion, and is held radially by the retaining portion and the protrusion.

9. The dual rotary scroll compressor according to claim 7, The elastomer has: A first elastic body disposed between the protrusion and the first wall; and The second elastic body is disposed between the second bearing and the second wall.

10. The dual rotary scroll compressor according to claim 4, At least a portion of the first elastomer overlaps with the stator core in the radial direction.

11. The dual rotary scroll compressor according to claim 8, At least a portion of the elastomer overlaps with the stator core in the radial direction.

12. The dual rotary scroll compressor according to claim 2 or 7, The protrusion has: In the first diameter section, the cover is supported at the first diameter section via the first bearing in a manner rotatable about the drive axis, and the driven scroll member is supported at the first diameter section in a manner rotatable about the driven axis; and The second diameter portion has a larger diameter than the first diameter portion, and the stator core is disposed on its outer circumferential surface. The first diameter portion is located on the side of the compression chamber that is closer to the second diameter portion than the first diameter portion in the direction of the drive shaft.

13. The dual rotary scroll compressor according to claim 12, The driven vortex member is supported on the first radial portion at a position that is radially inner than the cover, in a manner that allows it to rotate about the driven axis.

14. The dual rotary scroll compressor according to claim 13, The driven scroll member has a driven shaft portion supported on the first radial portion. The stator core, the first bearing, and the driven shaft are arranged sequentially from the first wall side toward the compression chamber side in the direction of the drive shaft center.

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