Co-rotating scroll compressor

Abstract

A co-rotating scroll compressor includes a housing, a driving scroll, a driven scroll, a driving mechanism, and a driven mechanism. The housing has a scroll chamber. A projection body that is attached to the housing with a gap between the projection body and the housing and a restricting body that restricts the projection body from rotating relative to the housing are provided in the scroll chamber. The restricting body has a shaft member inserted into the projection body and the housing and a supporting member provided on an outer peripheral surface of the shaft member. The supporting member supports the shaft member while elastically deforming between the shaft member and a specific member that is one of the projection body and the housing.

Description

CROSS-REFERENCE TO RELATED APPLICATION

[0001] This application claims priority to Japanese Patent Application No. 2025-049848 filed on Mar. 25, 2025, the entire disclosure of which is incorporated herein by reference.BACKGROUND ART

[0002] The present disclosure relates to a co-rotating scroll compressor.

[0003] Japanese Patent Application Publication No. H02-227575 discloses a conventional co-rotating scroll compressor (hereinafter, simply and appropriately referred to as a compressor). This compressor includes a housing, a driving scroll, a driven scroll, a driving mechanism, and a driven mechanism. The housing has a scroll chamber in which the driving mechanism, the driving scroll, and the driven scroll are accommodated. Fluid is sucked into the scroll chamber from the outside of the housing. Specifically, the fluid in the Publication is a refrigerant.

[0004] The driving mechanism includes a stator and a rotor. The stator is formed in a tubular shape and is fixed to the housing at the outer periphery of the stator. The rotor is disposed radially inside the stator. The driving scroll has an extending portion formed in a tubular shape. The rotor is fixed to the outer peripheral surface of the extending portion. This allows the driving scroll to be driven rotatably about a driving axis with rotation of the rotor. The driven scroll is eccentric to the driving scroll and is driven rotatably about a driven axis by the driving scroll and the driven mechanism to follow the driving scroll. These driving scroll and driven scroll form a compression chamber in which the fluid is compressed by the rotational driving of the driving scroll and the rotational following of the driven scroll.

[0005] In this compressor, a projection body is formed integrally with the housing. The projection body is formed in a substantially columnar shape with a constant outer diameter and extends toward the driving scroll and the driven scroll in a direction in which the driving axis extends in the scroll chamber. The projection body extends into the extending portion, and rotatably supports the extending portion, and by extension, the driving scroll via a bearing. A fluid passage is formed through the projection body so as to extend in the direction in which the driving axis extends. The fluid passage communicates with the compression chamber at one end of the fluid passage in the direction in which the driving axis extends, and communicates with the outside of the housing at the other end of the fluid passage in the direction in which the driving axis extends.

[0006] In this compressor, the fluid in the scroll chamber is sucked into the compression chamber, and then, is compressed in the compression chamber. The fluid compressed in the compression chamber is discharged to the outside of the housing, that is, to the outside of the compressor through the fluid passage.

[0007] In the above-described conventional compressor, the driving scroll has the extending portion rotatably supported by the projection body. With this configuration in the compressor, a temperature of the projection body is increased due to friction between the projection body and the rotating extending portion.

[0008] Furthermore, in this compressor, since the extending portion is rotatably supported by the projection body, vibrations generated in the driving scroll during the operation of the compressor are transmitted to the projection body through the extending portion.

[0009] Here, in this compressor, since the projection body is formed integrally with the housing, when the temperature of the projection body is increased as described above, heat of the projection body is easily transferred to the entire housing. Accordingly, in this compressor, there is concern that durability of the housing is decreased due to the heat. Furthermore, in this compressor, the projection body is formed integrally with the housing, which easily transmits vibrations from the projection body to the entire housing. Thus, the housing is susceptible to the vibrations during operation of the compressor. As a result, quietness of this compressor is decreased.

[0010] The present disclosure is made in light of the above-described conventional circumstances, and is directed to providing a co-rotating scroll compressor having excellent durability and quietness.SUMMARY

[0011] In accordance with a first aspect of the present disclosure, there is provided a co-rotating scroll compressor that includes a housing; a driving scroll; a driven scroll; a driving mechanism; and a driven mechanism, the housing having a scroll chamber in which the driving scroll, the driven scroll, and the driving mechanism are accommodated, the driving mechanism having a stator and a rotor that is rotationally driven by the stator, the driving scroll being driven rotationally about a driving axis by the driving mechanism, the driven scroll being eccentric to the driving scroll and being driven rotationally about a driven axis by the driving scroll and the driven mechanism to follow the driving scroll, and the driving scroll and the driven scroll forming a compression chamber in which fluid is compressed by the rotational driving of the driving scroll and the rotational following of the driven scroll. A projection body and a restricting body are provided in the scroll chamber. The projection body extends toward the driving scroll and the driven scroll in a direction in which the driving axis extends, is formed separately from the housing, and is attached to the housing with a gap between the projection body and the housing. The restricting body restricts the projection body from rotating relative to the housing. The driving scroll is supported rotatably about the driving axis by the projection body. The driven scroll is supported rotatably about the driven axis by the projection body. The restricting body has a s haft member that is inserted into the projection body and the housing and a supporting member that is provided on an outer peripheral surface of the shaft member. The supporting member supports the shaft member while elastically deforming between the shaft member and a specific member that is one of the projection body and the housing.

[0012] In accordance with a second aspect of the present disclosure, there is provided a co-rotating scroll compressor that includes a housing; a driving scroll; a driven scroll; a driving mechanism; and a driven mechanism, the housing having a scroll chamber in which the driving scroll, the driven scroll, and the driving mechanism are accommodated, the driving mechanism having a stator and a rotor that encloses the stator and that is rotationally driven by the stator, the driving scroll being driven rotationally about a driving axis by the driving mechanism, the driven scroll being eccentric to the driving scroll and being driven rotationally about a driven axis by the driving scroll and the driven mechanism to follow the driving scroll, and the driving scroll and the driven scroll forming a compression chamber in which fluid is compressed by the rotational driving of the driving scroll and the rotational following of the driven scroll. A projection body and a restricting body are provided in the scroll chamber. The projection body extends toward the driving scroll and the driven scroll in a direction in which the driving axis extends, is formed separately from the housing, and is attached to the housing with a gap between the projection body and the housing. The restricting body restricts the projection body from rotating relative to the housing. The stator is attached to the projection body. The driving scroll is supported rotatably about the driving axis by the projection body. The driven scroll is supported rotatably about the driven axis by the projection body. The restricting body has a shaft member that is inserted into the housing and the stator and a supporting member that is provided on an outer peripheral surface of the shaft member. The supporting member supports the shaft member while elastically deforming between the shaft member and a specific member that is one of the housing and the stator.

[0013] In accordance with a third aspect of the present disclosure, there is provided a co-rotating scroll compressor that includes a housing; a driving scroll; a driven scroll; a driving mechanism; and a driven mechanism, the housing having a scroll chamber in which the driving scroll, the driven scroll, and the driving mechanism are accommodated, the driving mechanism having a stator and a rotor that is rotationally driven by the stator, the driving scroll being driven rotationally about a driving axis by the driving mechanism, the driven scroll being eccentric to the driving scroll and being driven rotationally about a driven axis by the driving scroll and the driven mechanism to follow the driving scroll, and the driving scroll and the driven scroll forming a compression chamber in which fluid is compressed by the rotational driving of the driving scroll and the rotational following of the driven scroll. A projection body and a restricting body are provided in the scroll chamber. The projection body extends toward the driving scroll and the driven scroll in a direction in which the driving axis extends, is formed separately from the housing, and is attached to the housing with a gap between the projection body and the housing. The restricting body restricts the projection body from rotating relative to the housing. The driving scroll is supported rotatably about the driving axis by the projection body. The driven scroll is supported rotatably about the driven axis by the projection body. The restricting body has a s haft member that is inserted into the housing, the projection body, and the stator and a supporting member that is provided on an outer peripheral surface of the shaft member. The supporting member supports the shaft member while elastically deforming between the shaft member and a specific member that is one of the housing, the projection body, and the stator.

[0014] Other aspects and advantages of the disclosure will become apparent from the following description, taken in conjunction with the accompanying drawings, illustrating by way of example the principles of the disclosure.BRIEF DESCRIPTION OF DRAWINGS

[0015] The disclosure, together with objects and advantages thereof, may best be understood by reference to the following description of the embodiments together with the accompanying drawings in which:

[0016] FIG. 1 is a cross-sectional view of a compressor according to a first embodiment;

[0017] FIG. 2 is an enlarged cross-sectional view of the compressor according to the first embodiment, illustrating its main part including a projection body, a holding portion, an elastic body, and a restricting body;

[0018] FIG. 3 is an enlarged cross-sectional view of the compressor according to the first embodiment, illustrating its main part including the projection body and the restricting body;

[0019] FIG. 4 is an enlarged cross-sectional view of the compressor according to the first embodiment, illustrating its main part including the projection body and the restricting body when load equal to or greater than a set value is applied to the projection body;

[0020] FIG. 5 is an enlarged cross-sectional view of a compressor according to a second embodiment, illustrating its main part including a projection body, a holding portion, an elastic body, and a restricting body; and

[0021] FIG. 6 is an enlarged cross-sectional view of a compressor according to a third embodiment, illustrating its main part including a projection body, a holding portion, an elastic body, and a restricting body.DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The following will describe first to third embodiments according to the present disclosure with reference to the accompanying drawings. A compressor of each of the first to third embodiments is mounted on a vehicle, which is not illustrated, and is a part of an air conditioner of the vehicle.First Embodiment

[0023] As illustrated in FIG. 1, the compressor of the first embodiment includes a housing 6, an electric motor 10, a driving scroll 30, a driven scroll 40, and a driven mechanism 20. The electric motor 10 is an example of the “driving mechanism” in the present disclosure.

[0024] In the present embodiment, a front-rear direction and an up-down direction of the compressor are defined by solid arrows illustrated in FIG. 1. The front-rear direction and the up-down direction are perpendicular to each other. In FIG. 2 and subsequent drawings, the front-rear direction and the up-down direction of the compressor are defined so as to correspond to FIG. 1. Note that these directions are merely examples for the sake of description, and a posture of the compressor may be changed as appropriate depending on a vehicle on which the compressor is mounted.

[0025] As illustrated in FIG. 1, the housing 6 includes a housing main body 60, a first housing cover 61, and a second housing cover 62. The housing main body 60, the first housing cover 61, and the second housing cover 62 are each made of an aluminum alloy. Note that the housing main body 60, the first housing cover 61, and the second housing cover 62 may be made of steel, or the like.

[0026] The housing main body 60 has a cylindrical shape centered about a driving axis O1 and is open at its front end and rear end. The driving axis O1 is in parallel to the front-rear direction. A suction communication port 68 is formed in the housing main body 60. The suction communication port 68 extends in a radial direction of the housing main body 60. The suction communication port 68 is connected to an evaporator through a pipe. Here, illustration of the evaporator and the pipe are omitted.

[0027] The first housing cover 61 is located at the rear end of the housing main body 60. The first housing cover 61 has a cover main body 61a and a holding portion 61b. The cover main body 61a has a substantially disc shape centered about the driving axis O1 and extends in the radial direction of the housing 6. The cover main body 61a has a front surface 610a that is oriented forward and a rear surface 610b that is located opposite to the front surface 610a and oriented rearward.

[0028] The holding portion 61b is formed integrally with the cover main body 61a. The holding portion 61b has a columnar shape extending forward from the front surface 610a of the cover main body 61a in a direction in which the driving axis O1 extends. The holding portion 61b includes a base end portion 615 and a distal end portion 616.

[0029] As illustrated in FIG. 2, the base end portion 615 corresponds to a rear end portion of the holding portion 61b and is connected to the cover main body 61a. The distal end portion 616 is connected to the base end portion 615 and extends forward from the base end portion 615. The distal end portion 616 is formed in a columnar shape with a diameter smaller than that of the base end portion 615.

[0030] The holding portion 61b has three holding grooves 611 to 613. More specifically, the holding grooves 611 to 613 are recessed in an outer peripheral surface 616a of the distal end portion 616 and each have an annular shape extending around the outer peripheral surface 616a. The holding grooves 611 to 613 are arranged in this order from a rear portion of the distal end portion 616 toward a front portion of the distal end portion 616. These holding grooves 611 to 613 are arranged at equal intervals in the direction in which the driving axis O1 extends.

[0031] The distal end portion 616 also has a fixing hole 617. As illustrated in FIG. 3, the fixing hole 617 extends in the distal end portion 616 in the direction in which the driving axis O1 extends and is open in a front end surface 616b of the distal end portion 616. Here, the fixing hole 617 does not extend through the distal end portion 616, that is, the holding portion 61b in the direction in which the driving axis O1 extends.

[0032] As illustrated in FIG. 2, a one-side elastic body 70 is formed in the distal end portion 616. The one-side elastic body 70 is an example of the “elastic body” in the present disclosure. The one-side elastic body 70 includes a first elastic body 70a, a second elastic body 70b, and a third elastic body 70c.

[0033] These first to third elastic bodies 70a to 70c are made of elastically deformable resin, such as synthetic rubber. These first to third elastic bodies 70a to 70c are formed separately from each other. These first to third elastic bodies 70a to 70c each have an annular shape with the same outer diameter. Note that the first to third elastic bodies 70a to 70c, that is, the one-side elastic body 70 may be made of metal, or the like, having rigidity lower than that of the first housing cover 61.

[0034] The first elastic body 70a is accommodated in the holding groove 611. The second elastic body 70b is accommodated in the holding groove 612. The third elastic body 70c is accommodated in the holding groove 613. Thus, the first to third elastic bodies 70a to 70c, that is, the one-side elastic body 70 is attached to the distal end portion 616. In the distal end portion 616, the third elastic body 70c is disposed in front of the first elastic body 70a and the second elastic body 70b in the direction in which the driving axis O1 extends.

[0035] As illustrated in FIG. 2, a projection body 64 is attached to the first housing cover 61. The projection body 64 is made of steel. The projection body 64 has a first diameter portion 64a and a second diameter portion 64b. The first diameter portion 64a corresponds to a front portion of the projection body 64. A pin hole 4 is formed in the first diameter portion 64a. The pin hole 4 extends in the first diameter portion 64a in the direction in which the driving axis O1 extends and is open in the front end surface of the first diameter portion 64a.

[0036] A first radial ball bearing 51 is provided on the outer peripheral surface of the first diameter portion 64a. Although not illustrated in detail, the first radial ball bearing 51 is fitted to the outer peripheral surface of the first diameter portion 64a with a clearance therebetween. Instead of the first radial ball bearing 51, a plain bearing may be provided on the outer peripheral surface of the first diameter portion 64a.

[0037] The second diameter portion 64b is integrated with the first diameter portion 64a at the front end of the second diameter portion 64b. Thus, the second diameter portion 64b corresponds to a rear portion of the projection body 64. The second diameter portion 64b is formed in a bottomed tubular shape with an outer diameter larger than that of the first diameter portion 64a and is open at the rear end of the second diameter portion 64b. Here, an inner diameter of the second diameter portion 64b is larger than the outer diameter of the distal end portion 616 of the holding portion 61b, and is slightly smaller than the outer diameter of the one-side elastic body 70, that is, the outer diameter of each of the first to third elastic bodies 70a to 70c.

[0038] As illustrated in FIG. 3, an attachment hole 641 is formed in the second diameter portion 64b. More specifically, the attachment hole 641 is formed in the second diameter portion 64b so as to be coaxial with the fixing hole 617. The attachment hole 641 has a columnar shape and extends through the second diameter portion 64b in the direction in which the driving axis O1 extends. In more detail, the inner diameter of the attachment hole 641 is greater than each of a first length L1 and a second length L2, and is slightly less than a third length L3. These lengths L1 to L3 will be described later. With the attachment hole 641 formed in the second diameter portion 64b in this manner, the projection body 64 of this compressor corresponds to the “specific member” in the present disclosure.

[0039] As illustrated in FIG. 2, the distal end portion 616 and the one-side elastic body 70 are inserted into the second diameter portion 64b of the projection body 64. That is, the distal end portion 616 is located inside the second diameter portion 64b. As described above, since the inner diameter of the second diameter portion 64b is smaller than the outer diameter of the one-side elastic body 70, the one-side elastic body 70, that is, the first to third elastic bodies 70a to 70c elastically deform in the radial direction of the housing 6 and are located between the distal end portion 616 and the second diameter portion 64b.

[0040] When the distal end portion 616 is located inside the second diameter portion 64b in this manner, the attachment hole 641 is located in front of the fixing hole 617. The attachment hole 641 and the fixing hole 617 are coaxially aligned with each other in the direction in which the driving axis O1 extends.

[0041] Thus, the projection body 64 is attached to the first housing cover 61 via the one-side elastic body 70. The holding portion 61b holds the projection body 64 from the inside of the projection body 64 via the one-side elastic body 70. That is, the first housing cover 61 supports the projection body 64.

[0042] Here, in a state where the projection body 64 is attached to the first housing cover 61, the second diameter portion 64b is spaced apart from the base end portion 615 of the holding portion 61b and is located in front of the base end portion 615. That is, the second diameter portion 64b and the base end portion 615 are not in contact with each other. Furthermore, the one-side elastic body 70 is located between the second diameter portion 64b and the distal end portion 616 of the holding portion 61b, so that the second diameter portion 64b is also spaced apart from the distal end portion 616. Thus, the projection body 64 is attached to the first housing cover 61 with a gap therebetween.

[0043] In a state where the projection body 64 is attached to the first housing cover 61 in this manner, in this compressor, a first restricting body 81 is provided in the projection body 64 and the holding portion 61b. The first restricting body 81 is an example of the “restricting body” in the present disclosure.

[0044] As illustrated in FIG. 3, the first restricting body 81 has a first shaft member 81a and a first supporting member 81b. The first shaft member 81a is an example of the “shaft member” in the present disclosure, and the first supporting member 81b is an example of the “supporting member” of the present disclosure.

[0045] The first shaft member 81a is made of steel. The first shaft member 81a has a main body 811 and a pair of contact portions 813. The main body 811 has a columnar shape extending in the direction in which the driving axis O1 extends. The outer diameter of the main body 811 is the first length L1. The first length L1 is less than each of the second length L2 and the third length L3. That is, the outer diameter of the main body 811 is smaller than the inner diameter of the attachment hole 641.

[0046] The contact portions 813 are formed integrally with the main body 811. The contact portions 813 are spaced apart from each other in the direction in which the driving axis O1 extends. The contact portions 813 each have a disk shape with the outer diameter of the second length L2. The second length L2 is greater than the first length L1, and is slightly less than the third length L3. Accordingly, the outer diameter of each of the contact portions 813 is larger than the outer diameter of the main body 811, and each of the contact portions 813 of the first shaft member 81a has a flange shape protruding from the main body 811 outwardly in the radial direction of the housing 6. On the other hand, the outer diameter of each of the contact portions 813 is smaller than the inner diameter of the attachment hole 641. Note that the main body 811 may be made of resin as long as the contact portions 813 are made of metal.

[0047] The first supporting member 81b is made of elastically deformable resin, such as synthetic rubber. The first supporting member 81b is formed in an annular shape. Here, the outer diameter of the first supporting member 81b is the third length L3. This third length L3 is greater than each of the first length L1 and the second length L2, and is slightly greater than the inner diameter of the attachment hole 641. Accordingly, the outer diameter of the first supporting member 81b is larger than each of the inner diameter of the attachment hole 641 and the outer diameters of the contact portions 813. On the other hand, the inner diameter of the first supporting member 81b is the first length L1.

[0048] The first supporting member 81b is disposed between the contact portions 813 with the main body 811 inserted through the first supporting member 81b. Thus, the first supporting member 81b is attached to the first shaft member 81a in a state where the first supporting member 81b is restricted by the contact portions 813 from moving in the direction in which the driving axis O1 extends. The outer diameter of the first supporting member 81b is larger than the outer diameter of each of the contact portions 813, so that the first supporting member 81b extends out of the contact portions 813 in the radial direction of the housing 6 in a state where the first supporting member 81b is attached to the first shaft member 81a.

[0049] The first restricting body 81 is inserted through the attachment hole 641 from the front thereof. Here, since the outer diameter of the first supporting member 81b is larger than the inner diameter of the attachment hole 641, the first supporting member 81b is inserted into the attachment hole 641 while elastically deforming in the radial direction of the housing 6. As a result, the first supporting member 81b elastically supports the first shaft member 81a in the attachment hole 641. The rear portion of the main body 811 of the first restricting body 81 is inserted into the fixing hole 617 and fixed to the fixing hole 617.

[0050] Thus, the first restricting body 81 is provided in the projection body 64 and the holding portion 61b, so that the projection body 64 and the holding portion 61b are connected to each other in the direction in which the driving axis O1 extends. As a result, the projection body 64 is restricted from rotating relative to the holding portion 61b, and by extension, the first housing cover 61.

[0051] As described above, since the outer diameter of each of the contact portions 813 is smaller than the inner diameter of the attachment hole 641, the contact portions 813 are located in the attachment hole 641 in the state where the first restricting body 81 is provided in the projection body 64 and the holding portion 61b. In this compressor, in a state where load applied to the projection body 64 is less than a value set in advance, including a state where the operation of the compressor is stopped, the contact portions 813 are spaced apart from the inner peripheral surface of the attachment hole 641 in the radial direction of the housing 6. That is, in the state where the load applied to the projection body 64 is less than the set value, the contact portions 813 are not in contact with the inner peripheral surface of the attachment hole 641, and by extension, the second diameter portion 64b. Furthermore, the main body 811, which has the outer diameter smaller than the outer diameter of each of the contact portions 813, is also not in contact with the second diameter portion 64b. Details of the load applied to the projection body 64 will be described later.

[0052] As illustrated in FIG. 1, the second housing cover 62 is disposed in front of the housing main body 60. The second housing cover 62 has a substantially disc shape centered about the driving axis O1 and extends in the radial direction of the housing 6. The second housing cover 62 has a front surface 62a that is oriented forward and a rear surface 62b that is located opposite to the front surface 62a and oriented rearward.

[0053] A supporting portion 66 and a discharge communication port 69 are formed in the second housing cover 62. The supporting portion 66 is formed integrally with the rear surface 62b substantially at a center thereof and protrudes rearward from the rear surface 62b. The supporting portion 66 is formed in a cylindrical shape centered about the driving axis O1 and has therein a second radial ball bearing 52, an other-side elastic body 67, and a shaft sealing member 63.

[0054] The other-side elastic body 67 is made of elastically deformable resin, such as synthetic rubber, and has a cylindrical shape. The other-side elastic body 67 is provided between the supporting portion 66 and the second radial ball bearing 52, encloses the second radial ball bearing 52, and holds the second radial ball bearing 52 in the supporting portion 66. Note that the other-side elastic body 67 may be made of metal, or the like, having rigidity lower than that of the second housing cover 62. The thickness of the other-side elastic body 67 may be designed as appropriate. In addition, a plain bearing may be provided inside the supporting portion 66, instead of the second radial ball bearing 52.

[0055] The shaft sealing member 63 is disposed in front of the second radial ball bearing 52 and the other-side elastic body 67 inside the supporting portion 66. The shaft sealing member 63 is formed in an annular shape.

[0056] The discharge communication port 69 extends through the second housing cover 62 in the direction in which the driving axis O1 extends and communicates with the inside of the supporting portion 66. The discharge communication port 69 is connected to a condenser through a pipe. Here, illustrations of the condenser and the pipe are omitted.

[0057] In the housing 6, the front surface 610a of the first housing cover 61 is in contact with the rear end of the housing main body 60, and the rear surface 62b of the second housing cover 62 is in contact with the front end of the housing main body 60. The housing main body 60, the first housing cover 61, and the second housing cover 62 are fixed with a plurality of bolts, which is not illustrated, in the direction in which the driving axis O1 extends.

[0058] Thus, in the housing 6, the housing main body 60 is held by the first housing cover 61 and the second housing cover 62 in the front-rear direction, and the housing main body 60 is closed by the first housing cover 61 and the second housing cover 62 at the rear end and the front end of the housing main body 60, respectively. As a result, a scroll chamber 65 is formed in the housing main body 60 of the housing 6. The scroll chamber 65 communicates with the suction communication port 68. Accordingly, a refrigerant is introduced into the scroll chamber 65 from the outside of the housing 6 through the suction communication port 68. The refrigerant is an example of the “fluid” in the present disclosure.

[0059] When the projection body 64 is attached to the first housing cover 61 as described above, the projection body 64 is disposed in the scroll chamber 65. Then, in the scroll chamber 65, the projection body 64 extends forward, that is, toward the driving scroll 30 and the driven scroll 40 from the first housing cover 61.

[0060] The electric motor 10 is accommodated in the scroll chamber 65. Accordingly, the scroll chamber 65 serves as a motor chamber in which the electric motor 10 is accommodated.

[0061] As illustrated in FIG. 2, the electric motor 10 includes a stator 17 and a rotor 11. The stator 17 has a stator core 17a and a winding 17b. The stator core 17a is formed of electromagnetic steel sheets and has a cylindrical shape centered about the driving axis O1. The winding 17b is wound around the stator core 17a, thereby forming a first coil end 171 and a second coil end 172.

[0062] The stator core 17a of the stator 17 is fitted onto the outer peripheral surface of the second diameter portion 64b. Thus, the stator core 17a is fixed and attached to the outer peripheral surface of the second diameter portion 64b, and by extension, the outer peripheral surface of the projection body 64. Although not illustrated, a plurality of slits extending in the direction in which the driving axis O1 extends is formed in the inner peripheral surface of the stator core 17a. Accordingly, the slits make spaces between the stator core 17a and the outer peripheral surface of the second diameter portion 64b in a state where the stator core 17a is fixed to the second diameter portion 64b. The stator core 17a may be attached to the projection body 64 by a method other than fitting.

[0063] The rotor 11 has a cylindrical shape centered about the driving axis O1. Although not illustrated in detail, the rotor 11 has a plurality of permanent magnets corresponding to the stator 17 and stacking steel plates for fixing the permanent magnets. The diameter of the rotor 11 is larger than that of the stator core 17a. That is, the rotor 11 encloses the stator core 17a in the scroll chamber 65. A plurality of first bolt holes 11a is formed in the rotor 11. The first bolt holes 11a extend through the rotor 11 in the direction in which the driving axis O1 extends.

[0064] As illustrated in FIG. 1, the driving scroll 30 is accommodated in the scroll chamber 65. The driving scroll 30 is made of an aluminum alloy. The driving scroll 30 has a driving scroll end plate 31, a driving scroll spiral body 33, a driving scroll peripheral wall 35, a cover body 37, and a case 39.

[0065] The driving scroll end plate 31 has a substantially disc shape extending perpendicularly to the driving axis O1 and a driven axis O2. The driven axis O2 extends in parallel to the driving axis O1 while being eccentric to the driving axis O1. That is, the driven axis O2 is also parallel to the front-rear direction. The driving scroll end plate 31 has a first front surface 311 that is oriented forward and a first rear surface 312 that is located opposite to the first front surface 311 and oriented rearward.

[0066] A discharge port 32 is formed in the driving scroll end plate 31. The discharge port 32 extends through the driving scroll end plate 31 in the direction in which the driving axis O1 extends. A discharge reed valve 57 and a retainer 58 are fixed to the first front surface 311 of the driving scroll end plate 31 with a fixing bolt 59. This configuration allows the discharge reed valve 57 to open and close the discharge port 32. The retainer 58 is capable of adjusting an opening degree of the discharge reed valve 57.

[0067] The driving scroll spiral body 33 is integrated with the driving scroll end plate 31 and extends from the first rear surface 312 rearward, that is, toward the driven scroll 40 in parallel to the driving axis O1 and the driven axis O2. Although not illustrated in detail, the driving scroll spiral body 33 has a spiral shape centered about the center of the driving scroll end plate 31 and radially outwardly extending from the center of the spiral shape.

[0068] The driving scroll peripheral wall 35 is formed in a cylindrical shape centered about the driving axis O1 and extending in parallel to the driving axis O1 and the driven axis O2. The driving scroll peripheral wall 35, at the front end thereof, is integrated with the outer peripheral edge of the driving scroll end plate 31. The driving scroll peripheral wall 35 has a cylindrical shape extending rearward from the first rear surface 312 and encloses the driving scroll spiral body 33. Although not illustrated, the outer peripheral end of the spiral of the driving scroll spiral body 33 is connected to the inner peripheral surface of the driving scroll peripheral wall 35.

[0069] The cover body 37 has a wall portion 37a, an inner tubular portion 37b, and an outer tubular portion 37c. The wall portion 37a has a substantially plate shape extending in a radial direction of the driving scroll 30, that is, in the radial direction of the housing 6. The wall portion 37a has a second front surface 371 that is oriented forward and a second rear surface 372 that is located opposite to the second front surface 371 and is oriented rearward.

[0070] A recess 373 and a suction port 374 are formed in the wall portion 37a. The recess 373 is located substantially at a center of the second front surface 371 and recessed rearward in the second front surface 371.

[0071] The suction port 374 is located outside the recess 373 in the radial direction of the housing 6. The suction port 374 extends through the wall portion 37a in the front-rear direction. The suction port 374 is open in the second front surface 371 at the front end of the suction port 374, and is open in the second rear surface 372 at the rear end of the suction port 374. A plurality of the suction ports 374 may be formed in the wall portion 37a.

[0072] A plurality of rings 22 is attached to the wall portion 37a between the recess 373 and the suction port 374. Although not illustrated in detail, the rings 22 are oriented forward and arranged at equal intervals in a circumferential direction of the recess 373 so that the rings 22 surround the recess 373. In the present embodiment, the number of the rings 22 is six. In FIG. 1, one of the six rings 22 is illustrated.

[0073] As illustrated in FIG. 2, the inner tubular portion 37b is located inside the stator 17 in the radial direction of the housing 6 and has a cylindrical shape extending from the second rear surface 372 of the wall portion 37a rearward in the direction in which the driving axis O1 extends. The inner tubular portion 37b communicates with the recess 373 in the direction in which the driving axis O1 extends. The inner diameter of the inner tubular portion 37b is larger than the outer diameter of the first diameter portion 64a of the projection body 64 and has substantially the same diameter as the outer diameter of the first radial ball bearing 51. The outer diameter of the inner tubular portion 37b is smaller than the outer diameter of the second diameter portion 64b.

[0074] The outer tubular portion 37c is connected to the wall portion 37a and has a cylindrical shape extending from the wall portion 37a rearward in the direction in which the driving axis O1 extends. The outer diameter of the outer tubular portion 37c is substantially the same as each of the outer diameter of the wall portion 37a, the outer diameter of the driving scroll peripheral wall 35, and the outer diameter of the rotor 11.

[0075] The inner diameter of the outer tubular portion 37c is larger than the outer diameter of the inner tubular portion 37b. As a result, in the cover body 37, the inner tubular portion 37b is located radially inside the outer tubular portion 37c in a state where the inner tubular portion 37b is spaced apart from the outer tubular portion 37c in the radial direction of the housing 6. Accordingly, the wall portion 37a, the inner tubular portion 37b, and the outer tubular portion 37c form an accommodation portion 38 in the cover body 37. The accommodation portion 38 has a bottomed annular shape that is open at its rear end.

[0076] The suction port 374 formed in the wall portion 37a is located outside the inner tubular portion 37b and inside the outer tubular portion 37c in the radial direction of the housing 6. Accordingly, the suction port 374 communicates with the accommodation portion 38 between the inner tubular portion 37b and the outer tubular portion 37c.

[0077] A plurality of second bolt holes 376 is formed in the outer tubular portion 37c and the wall portion 37a. The second bolt holes 376 extend through the outer tubular portion 37c and the wall portion 37a in the direction in which the driving axis O1 extends. Although not illustrated, the number of the second bolt holes 376 is equal to the number of first bolt holes 11a formed in the rotor 11. In FIGS. 1, 2, 5, and 6, one of the first bolt holes 11a and one of the second bolt holes 376 are illustrated.

[0078] As illustrated in FIG. 1, the second front surface 371 of the wall portion 37a of the cover body 37 is in contact with the rear end of the driving scroll peripheral wall 35. The rotor 11 is in contact with the rear end of the outer tubular portion 37c of the cover body 37. In this state, first bolts 34a are inserted into the corresponding first bolt holes 11a of the rotor 11 and the second bolt holes 376 in this order, and are screwed into the driving scroll peripheral wall 35. Thus, the cover body 37 is held by and fixed to the driving scroll peripheral wall 35 and the rotor 11 in the front-rear direction. As a result, the driving scroll 30 is integrated with the rotor 11.

[0079] The case 39 is a bottomed tubular member, and has an outer peripheral wall 39a and a front wall 39b. The outer peripheral wall 39a has a cylindrical shape centered about the driving axis O1. Here, the outer diameter of the outer peripheral wall 39a is substantially the same as the outer diameter of the driving scroll peripheral wall 35.

[0080] The front wall 39b is located at the front end of the case 39. The front wall 39b has a substantially disc shape extending perpendicularly to the driving axis O1 and the driven axis O2. The front wall 39b is connected to the front end of the outer peripheral wall 39a. A boss 39d is formed in the front wall 39b. A discharge passage 390 is formed in the boss 39d. The discharge passage 390 extends through the boss 39d in the direction in which the driving axis O1 extends.

[0081] Third bolt holes 39e are formed in the outer peripheral wall 39a and the front wall 39b. The third bolt holes 39e extend through the outer peripheral wall 39a and the front wall 39b in the direction in which the driving axis O1 extends. Although not illustrated, a plurality of the third bolt holes 39e is formed in the outer peripheral wall 39a and the front wall 39b. In FIG. 1, one of the third bolt holes 39e is illustrated.

[0082] The rear surface of the outer peripheral wall 39a of the case 39 is in contact with the front end of the driving scroll peripheral wall 35. In this state, second bolts 34b are inserted into the corresponding third bolt holes 39e, and are screwed into the driving scroll peripheral wall 35. Thus, in the driving scroll 30, the case 39 is fixed to the driving scroll peripheral wall 35.

[0083] The case 39 is fixed to the driving scroll peripheral wall 35 in this manner, so that a discharge chamber 14 is formed inside the outer peripheral wall 39a and between the front wall 39b of the case 39 and the driving scroll end plate 31. The discharge chamber 14 communicates with not only the discharge port 32 but also the discharge passage 390.

[0084] The driven scroll 40 is made of an aluminum alloy. The driven scroll 40 has a driven scroll end plate 41 and a driven scroll spiral body 43.

[0085] The driven scroll end plate 41 has a substantially disc shape extending perpendicularly to the driving axis O1 and the driven axis O2. The driven scroll end plate 41 has a third front surface 411 that is oriented forward and a third rear surface 412 that is located opposite to the third front surface 411 and is oriented rearward.

[0086] An accommodation recess 15 is formed in the driven scroll end plate 41. The accommodation recess 15 is located at the center of the driven scroll end plate 41. The accommodation recess 15 is recessed forward in the third rear surface 412 of the driven scroll end plate 41 and has a columnar shape centered about the driven axis O2. Thus, the accommodation recess 15 faces a rear of the driven scroll end plate 41, and by extension, the first diameter portion 64a of the projection body 64.

[0087] A driven shaft portion 16 and a plain bearing 13 are provided in the accommodation recess 15. The driven shaft portion 16 includes a bushing 53 and a driven pin 55. The bushing 53 is accommodated in the accommodation recess 15 via the plain bearing 13. Although not illustrated in detail, the bushing 53 is fitted into the plain bearing 13. The plain bearing 13 is fitted to the accommodation recess 15 with a clearance therebetween.

[0088] The driven pin 55 is inserted in the bushing 53. More specifically, the driven pin 55 is inserted in the bushing 53 at a position eccentric to the center of the bushing 53, that is, the driven axis O2. The driven pin 55 extends rearward out of the bushing 53, and by extension, the driven scroll end plate 41.

[0089] Orbiting pins 21 are each fixed to the driven scroll end plate 41 so as to face a corresponding one of the rings 22. The orbiting pins 21 extend rearward out of the third rear surface 412. Note that the six orbiting pins 21 equal in number to the rings 22 are fixed to the driven scroll end plate 41. In FIG. 1, one of the six orbiting pins 21 is illustrated.

[0090] These orbiting pins 21 and rings 22 form the driven mechanism 20. Here, as long as the number of the orbiting pins 21 and the number of the rings 22 are each three or more, their numbers may be designed as appropriate.

[0091] The driven scroll spiral body 43 is integrated with the driven scroll end plate 41 and extends forward from the third front surface 411 of the driven scroll end plate 41 in parallel to the driving axis O1 and the driven axis O2. The driven scroll spiral body 43 has a spiral shape centered about the center of the driven scroll end plate 41 and radially outwardly extending from the center of the spiral shape.

[0092] In this compressor, the driven scroll 40 is accommodated in the driving scroll 30, more specifically, between the cover body 37 and a set of the driving scroll spiral body 33 and the driving scroll peripheral wall 35 in the driving scroll 30. The driving scroll spiral body 33 is meshed with the driven scroll spiral body 43. Accordingly, the driving scroll spiral body 33 and the driven scroll spiral body 43 face each other to form a compression chamber 12.

[0093] A suction portion 30a is formed between the driving scroll peripheral wall 35 and the driven scroll 40. That is, the driving scroll spiral body 33 and the driven scroll spiral body 43 are located in the suction portion 30a. The suction portion 30a is separated from the scroll chamber 65 by the driving scroll peripheral wall 35 and the cover body 37 and is also separated from the discharge chamber 14 by the driving scroll end plate 31. The suction portion 30a communicates with the suction port 374. Accordingly, the suction portion 30a communicates with the accommodation portion 38 through the suction port 374.

[0094] When the driven scroll 40 is accommodated in the driving scroll 30, the second front surface 371 of the wall portion 37a faces the third rear surface 412 of the driven scroll end plate 41 in the direction in which the driving axis O1 extends. Then, the orbiting pins 21 are located in the corresponding rings 22. Thus, the driving scroll 30 is assembled with the driven scroll 40 in the front-rear direction, so that the driving scroll 30 and the driven scroll 40 form a scroll compression part 100. Technically speaking, after the driving scroll spiral body 33 is meshed with the driven scroll spiral body 43, and the orbiting pins 21 are inserted into the corresponding rings 22, the cover body 37 of the driving scroll 30 is fixed to the driving scroll peripheral wall 35 and the rotor 11.

[0095] This assembly of the driving scroll 30 with the driven scroll 40 allows the accommodation recess 15 of the driven scroll end plate 41 and the driven shaft portion 16 to face the recess 373 of the cover body 37.

[0096] In the scroll chamber 65, the driving scroll 30 is disposed in front of the stator core 17a. As illustrated in FIG. 2, in the driving scroll 30, the inner tubular portion 37b of the cover body 37 is located radially inside the first coil end 171. In this state, the first radial ball bearing 51 is fitted into the inner tubular portion 37b. Thus, the inner tubular portion 37b, and by extension, the cover body 37 is supported rotatably about the driving axis O1 by the first diameter portion 64a of the projection body 64 via the first radial ball bearing 51.

[0097] The cover body 37 is rotatably supported by the first diameter portion 64a in this manner, so that the accommodation portion 38 communicates with the scroll chamber 65. The first coil end 171 is accommodated in the accommodation portion 38. Thus, the first coil end 171 faces the wall portion 37a in the front-rear direction in the accommodation portion 38, and encloses the inner tubular portion 37b in the radial direction of the housing 6. The first coil end 171 is enclosed by the outer tubular portion 37c in the accommodation portion 38 in the radial direction of the housing 6.

[0098] As illustrated in FIG. 1, in the driving scroll 30, the boss 39d of the case 39 is inserted through the second radial ball bearing 52 and the shaft sealing member 63. Here, the boss 39d is fitted into the second radial ball bearing 52. As a result, the boss 39d is supported rotatably about the driving axis O1 by the supporting portion 66 via the second radial ball bearing 52 and the other-side elastic body 67. Thus, the driving scroll 30 is disposed in the scroll chamber 65 and is supported rotatably about the driving axis O1 by the housing 6 via the projection body 64 and the supporting portion 66.

[0099] When the case 39 is supported by the supporting portion 66, the discharge passage 390 faces the discharge communication port 69 from the rear thereof. In this state, the discharge chamber 14 communicates with the discharge communication port 69 through the discharge passage 390. The shaft sealing member 63 provides seal between the scroll chamber 65 and a set of the discharge passage 390 and the discharge communication port 69.

[0100] In the driven scroll 40, the driven pin 55 is inserted in the pin hole 4 of the driven shaft portion 16. As a result, the driven scroll 40 is disposed in front of the projection body 64 and is supported rotatably about the driven axis O2 by the first diameter portion 64a. The driven scroll 40 is rotatably supported by the first diameter portion 64a in this manner, so that the driven scroll 40 is also rotatably supported by the projection body 64 in front of the stator core 17a. That is, the driven scroll 40 is located closer to the compression chamber 12 than the stator core 17a and is supported rotatably about the driven axis O2 by the projection body 64. When the driven pin 55 is inserted into the pin hole 4, the driven scroll 40 is supported rotatably about the driven axis O2 by the first diameter portion 64a, inside the inner tubular portion 37b in the radial direction of the housing 6. Thus, unlike the driving scroll 30, the driven scroll 40 is supported rotatably about the driven axis O2 by the housing 6 only via the projection body 64.

[0101] In this compressor, the stator core 17a, the first radial ball bearing 51, and the bushing 53 of the driven shaft portion 16 are arranged in this order from a side of the first housing cover 61 toward the compression chamber 12 in the direction in which the driving axis O1 extends.

[0102] In the compressor having the configuration described above, as illustrated by broken arrows of FIGS. 1 and 2, the refrigerant at low temperature and low pressure passing through the evaporator is sucked into the scroll chamber 65 through the suction communication port 68. Then, when the electric motor 10 is operated to rotate the rotor 11, the rotation of the rotor 11 is transmitted to the driving scroll 30, so that the driving scroll 30 is driven rotationally about the driving axis O1 in the scroll chamber 65. That is, the driving scroll 30 is rotated integrally with the rotor 11. Here, in the driven mechanism 20, each of the orbiting pins 21 allows the corresponding ring 22 to rotate about and relative to the orbiting pin 21 while sliding on an inner peripheral surface of the ring 22. Thus, the driven mechanism 20 transmits torque of the driving scroll 30 to the driven scroll 40.

[0103] As a result, the driven scroll 40 is driven rotationally about the driven axis O2 by the driving scroll 30 and the driven mechanism 20 to follow the driving scroll 30. Here, the driven mechanism 20 prevents the driven scroll 40 from rotating on its own axis. Accordingly, the driven scroll 40 orbits relative to the driving scroll 30 around the driven axis O2. The driving scroll spiral body 33 and the driven scroll spiral body 43 are each rotated in the suction portion 30a, so that the volume of the compression chamber 12 is changed by the driving scroll spiral body 33 and the driven scroll spiral body 43.

[0104] The refrigerant sucked into the scroll chamber 65 flows into the accommodation portion 38 through a space between the rotor 11 and the stator 17, as illustrated by broken arrows in FIGS. 1 and 2. The refrigerant sucked into the scroll chamber 65 flows into the accommodation portion 38 also through the slits formed in the stator core 17a. The refrigerant sucked into the scroll chamber 65 flows into the accommodation portion 38 also through a space between the winding 17b and slots that are formed in the stator core 17a and in which the winding 17b is accommodated. Here, illustrations of the slots are omitted. Thus, the refrigerant in the accommodation portion 38 is sucked into the compression chamber 12 through the suction port 374 and the suction portion 30a.

[0105] The compression chamber 12 confines the refrigerant therein and reduces its volume to compress the refrigerant by the rotational driving of the driving scroll 30 and the rotational following of the driven scroll 40. Thus, the high-pressure refrigerant compressed to reach discharge pressure flows from the discharge port 32 to the discharge chamber 14, and then, is discharged to the outside of the compressor through the discharge passage 390 and the discharge communication port 69. Here, in this compressor, since the shaft sealing member 63 provides the seal between the scroll chamber 65 and the set of the discharge passage 390 and the discharge communication port 69, the refrigerant that flows from the discharge passage 390 toward the discharge communication port 69 is prevented from flowing into the scroll chamber 65.

[0106] In this compressor, by the first diameter portion 64a of the projection body 64, the driving scroll 30 is supported rotatably about the driving axis O1, and the driven scroll 40 is supported rotatably about the driven axis O2. Accordingly, heat generated by friction between the rotating driving scroll 30 and the rotating driven scroll 40 during the operation of the compressor is inevitably transferred to the projection body 64. Furthermore, in this compressor, since the stator core 17a is fixed to the second diameter portion 64b of the projection body 64, heat generated in the electric motor 10 during the operation of the compressor is inevitably transferred to the projection body64.

[0107] In this compressor, vibrations generated in the driving scroll 30 and the driven scroll 40 during the operation of the compressor are also transmitted to the projection body 64. Furthermore, in this compressor, torque fluctuations of the electric motor 10 occur with the compression of the refrigerant in the compression chamber 12 during the operation of the compressor, so that vibrations caused by the torque fluctuations of the electric motor 10 are inevitably transmitted from the stator core 17a to the projection body 64.

[0108] Here, in this compressor, the projection body 64 is formed separately from the first housing cover 61, and the projection body 64 is attached to the first housing cover 61 with the gap between the first housing cover 61 and the projection body 64. As a result, in this compressor, heat of the projection body 64 is hardly transferred to the first housing cover 61, so that a temperature of the first housing cover 61, and by extension, a temperature of the housing 6 is hardly increased during the operation of the compressor. As a result, in this compressor, deterioration in durability of the housing 6 due to heat is suitably suppressed. In particular, in this compressor, since the projection body 64 is made of steel, the projection body 64 has high heat resistance. Accordingly, in this compressor, deterioration in durability of the projection body 64 due to heat is also suitably suppressed.

[0109] In addition, the projection body 64 is attached to the first housing cover 61 with the gap between the projection body 64 and the first housing cover 61, so that in this compressor, the vibrations transmitted from the electric motor 10, the driving scroll 30, and the driven scroll 40 to the projection body 64 during the operation of the compressor are also hardly transmitted from the projection body 64 to the first housing cover 61. Accordingly, in this compressor, vibrations of the housing 6 during the operation of the compressor are suitably suppressed.

[0110] In particular, in this compressor, the one-side elastic body 70 is provided between the second diameter portion 64b of the projection body 64 and the distal end portion 616 of the holding portion 61b. As a result, in this compressor, the one-side elastic body 70, that is, the first to third elastic bodies 70a to 70c elastically deform between the second diameter portion 64b and the distal end portion 616, so that it is suitably suppressed that the vibrations are transmitted from the projection body 64 to the first housing cover 61. Also in this respect, in this compressor, vibrations of the housing 6 during the operation of the compressor are suitably suppressed.

[0111] In this compressor, the first shaft member 81a of the first restricting body 81 is inserted through the attachment hole 641 of the second diameter portion 64b and into the fixing hole 617 of the distal end portion 616, so that the projection body 64 and the holding portion 61b are coupled to each other in the direction in which the driving axis O1 extends. This restricts that the projection body 64 rotates relative to the first housing cover 61 in this compressor.

[0112] Here, as illustrated in FIG. 3, in the first restricting body 81, the first supporting member 81b is provided on the first shaft member 81a, and the first supporting member 81b is located in the attachment hole 641 by inserting the first shaft member 81a through the attachment hole 641. The first supporting member 81b supports the first shaft member 81a while elastically deforming in the attachment hole 641. Thus, in this compressor, it is suitably suppressed that the vibrations are transmitted from the projection body 64 to the first housing cover 61 through the first restricting body 81.

[0113] Therefore, the compressor of the first embodiment has excellent durability and quietness.

[0114] In this compressor, due to compression load caused by the compression of the refrigerant in the compression chamber 12, load that inclines the driving scroll 30 and the driven scroll 40 relative to the front-rear direction of the compressor, that is, the axial direction of the housing 6 is inevitably applied to the driving scroll 30 and the driven scroll 40 during the operation of the compressor. Since the driving scroll 30 and the driven scroll 40 are rotatably supported by the projection body 64, the load that inclines the projection body 64 relative to the axial direction of the housing 6 is inevitably applied to the projection body 64 via the driving scroll 30 and the driven scroll 40.

[0115] In this respect, in this compressor, when load equal to or greater than a predetermined value is applied to the projection body 64, which inclines the projection body 64 at an angle equal to or greater than a predetermined angle in the scroll chamber 65 as illustrated in FIG. 4, in addition to the first supporting member 81b, one of the contact portions 813 of the first restricting body 81 is in contact with the inner peripheral surface of the attachment hole 641. Here, the projection body 64 is made of steel, and the first shaft member 81a, including the contact portions 813, is also made of steel. Accordingly, in this compressor, when the load equal to or greater than the predetermined value is applied to the projection body 64, which inclines the projection body 64 at the angle equal to or greater than the predetermined angle, the one of the contact portions 813 is in metal-to-metal contact with the inner peripheral surface of the attachment hole 641.

[0116] Thus, in this compressor, in a state where the load that is applied to the projection body 64 is less than the value set in advance, as illustrated in FIG. 3, the contact portions 813 are spaced apart from the inner peripheral surface of the attachment hole 641 in the radial direction of the housing 6, and the first shaft member 81a is not in contact with the projection body 64. This suitably suppresses that the vibrations are transmitted from the projection body 64 to the first housing cover 61 through the first restricting body 81. On the other hand, when the load equal to or greater than the set value is applied to the projection body 64, the one of the contact portions 813 may be in metal-to-metal contact with the inner peripheral surface of the attachment hole 641, so that the projection body 64 may be firmly supported by the first restricting body 81. As a result, in this compressor, the durability of the projection body 64 may also be improved.

[0117] The projection body 64 is prevented from being largely inclined in the scroll chamber 65 by the load in this manner, so that in this compressor, the projection body 64 may suitably and rotatably support the driving scroll 30 and the driven scroll 40. Although FIG. 4 illustrates a case where the load inclines the projection body 64 in a lower-left direction of the sheet of FIG. 4 within the scroll chamber 65, the load may also incline the projection body 64 in an upper-left direction of the sheet of FIG. 4 within the scroll chamber 65. Also in this case, in this compressor, the one of the contact portions 813 and the inner peripheral surface of the attachment hole 641 may be in metal-to-metal contact with each other.

[0118] In this compressor, the first restricting body 81 is disposed in front of the one-side elastic body 70 with the first shaft member 81a inserted through the attachment hole 641 and into the fixing hole 617. That is, the first restricting body 81 is located at a position closer to the compression chamber 12 than the one-side elastic body 70 in the direction in which the driving axis O1 extends. As a result, in this compressor, when the load equal to or greater than the set value is applied to the projection body 64 as described above, the first restricting body 81 may support the projection body 64 at the position closer to the compression chamber 12. Since the first restricting body 81 is located at the position closer to the compression chamber 12 than the one-side elastic body 70 in the direction in which the driving axis O1 extends, it is suppressed in this compressor that the first shaft member 81a has an excessively long axial length.Second Embodiment

[0119] As illustrated in FIG. 5, in the compressor of the second embodiment, an attachment hole 610c is formed in the cover main body 61a of the first housing cover 61, and a fixing hole 17c is formed in the stator core 17a. Unlike the compressor of the first embodiment, in this compressor, the attachment hole 641 is not formed in the second diameter portion 64b, and the fixing hole 617 is not formed in the distal end portion 616.

[0120] The attachment hole 610c is formed in the cover main body 61a outside the holding portion 61b in the radial direction of the housing 6. The attachment hole 610c extends through the cover main body 61a in the direction in which the driving axis O1 extends. As a result, the scroll chamber 65 communicates with the outside of the compressor through the attachment hole 610c. With the attachment hole 610c formed in this manner, the first housing cover 61 of this compressor corresponds to the “specific member” in the present disclosure. Note that although not illustrated in detail, similarly to the attachment hole 641, the attachment hole 610c is formed in a columnar shape, and the length of the inner diameter of the attachment hole 610c is greater than each of the first length L1 and the second length L2 and is slightly less than the third length L3.

[0121] The fixing hole 17c extends in the stator core 17a in the direction in which the driving axis O1 extends. The fixing hole 17c is open at the rear end surface of the stator core 17a radially inside the second coil end 172. When the stator core 17a is fitted to the outer peripheral surface of the second diameter portion 64b of the projection body 64 and the projection body 64 is attached to the first housing cover 61, the fixing hole 17c is disposed in front of the attachment hole 610c. The attachment hole 610c and the fixing hole 17c are coaxially aligned with each other in the direction in which the driving axis O1 extends.

[0122] In this compressor, the second restricting body 82 is provided instead of

[0123] the first restricting body 81. The second restricting body 82 is also an example of the “restricting body” in the present disclosure.

[0124] The second restricting body 82 has a second shaft member 82a and a second supporting member 82b. The second shaft member 82a corresponds to the “shaft member” in the present disclosure, and the second supporting member 82b corresponds to the “supporting member” in the present disclosure.

[0125] The second shaft member 82a is made of steel. The second shaft member 82a has a main body 821 and a pair of contact portions 823. The main body 821 has the same configuration as that of the main body 811 in the compressor of the first embodiment, except that the axial length of the main body 821 is greater than that of the main body 811. That is, the outer diameter of the main body 821 is the first length L1.

[0126] The contact portions 823 are formed integrally with the main body 821. Other configurations of each of the contact portions 823 are the same as those of each of the contact portions 813 in the compressor of the first embodiment. That is, the outer diameter of each of the contact portions 823 is the second length L2. The configuration of the second supporting member 82b is the same as that of the first supporting member 81b in the compressor of the first embodiment. That is, the outer diameter of the second supporting member 82b is the third length L3.

[0127] In the second restricting body 82, the second shaft member 82a is inserted into the attachment hole 610c from the rear thereof, that is, from the outside of the compressor. Here, the second supporting member 82b of the second restricting body 82 is inserted into the attachment hole 610c while elastically deforming in the radial direction of the housing 6. The front portion of the main body 821 of the second restricting body 82 is inserted into and fixed to the fixing hole 17c.

[0128] Thus, in this compressor, the first housing cover 61 and the stator 17 are coupled to each other in the direction in which the driving axis O1 extends by the second restricting body 82. Here, since the stator core 17a is fitted to the second diameter portion 64b of the projection body 64, the projection body 64 is connected to the first housing cover 61 via the stator 17 and the second restricting body 82. Accordingly, also in this compressor, the projection body 64 is restricted from rotating relative to the holding portion 61b, and by extension, the first housing cover 61.

[0129] In the second restricting body 82, the second supporting member 82b elastically deforms in the attachment hole 610c, so that the second supporting member 82b elastically supports the second shaft member 82a in the attachment hole 610c and provides seal between the scroll chamber 65 and the outside of the compressor. Other components of this compressor are the same as those of the compressor of the first embodiment, and identical components have the same reference numerals and may not be reiterated.

[0130] Also in this compressor, similarly to the compressor of the first embodiment, heat of the projection body 64 is hardly transferred to the housing 6, and vibrations are hardly transmitted from the projection body 64 to the first housing cover 61.

[0131] Although not illustrated in detail, in this compressor, the stator core 17a is attached to the second diameter portion of the projection body 64, so that when the projection body 64 is inclined in the scroll chamber 65 at an angle equal to or larger than a predetermined angle by load applied to the projection body 64, the stator 17 is also inclined integrally with the projection body 64. Accordingly, similarly to the compressor of the first embodiment, also in this compressor, when the load equal to or greater than a predetermined value is applied to the projection body 64, which inclines the projection body 64 and the stator 17 at the angle equal to or greater than the predetermined angle, one of the contact portions 823 of the second restricting body 82 is in contact with the inner peripheral surface of the attachment hole 610c. Here, since the first housing cover 61 is made of an aluminum alloy, also in this compressor, the one of the contact portions 823 may be in metal-to-metal contact with the inner peripheral surface of the attachment hole 610c. As a result, this compressor is also capable of providing the same effects of the first embodiment.Third Embodiment

[0132] As illustrated in FIG. 6, in the compressor of the third embodiment, a communication hole 643 is formed in the second diameter portion 64b. The communication hole 643 has the same configuration as that of the attachment hole 641 in the compressor of the first embodiment, and is formed in the second diameter portion 64b so as to be coaxial with the fixing hole 617. The communication hole 643 is formed in a columnar shape, and the inner diameter of the communication hole 643 is greater than each of the first length L1 and the second length L2 and is slightly less than the third length L3. The communication hole 643 extends through the second diameter portion 64b in the direction in which the driving axis O1 extends.

[0133] In this compressor, the stator 17 has an extension member 17d. The extension member 17d is made of a metal plate material, and has a substantially rectangular shape extending in the radial direction of the housing 6. The extension member 17d is fixed to the stator core 17a with a fixing pin 17e. More specifically, the extension member 17d is fixed to the front end surface of the stator core 17a inside the first coil end 171, and extends from the stator core 17a toward the projection body 64 in the radial direction of the housing 6.

[0134] An attachment hole 17f is formed in the extension member 17d. The attachment hole 17f is formed in the extension member 17d so as to be coaxial with the communication hole 643 and the fixing hole 617. With the attachment hole 17f formed in this manner, the extension member 17d of this compressor, that is, the stator 17, corresponds to the “specific member” in the present disclosure.

[0135] The attachment hole 17f is formed in a columnar shape, and the inner diameter of the attachment hole 17f is greater than each of the first length L1 and the second length L2 and is slightly less than the third length L3. The attachment hole 17f extends through the extension member 17d in the direction in which the driving axis O1 extends. As a result, the attachment hole 17f has the same diameter as that of the communication hole 643. Note that the communication hole 643 may be larger or smaller than the attachment hole 17f.

[0136] In this compressor, a third restricting body 83 is provided instead of the first restricting body 81. The third restricting body 83 is an example of the “restricting body” in the present disclosure.

[0137] The third restricting body 83 has a third shaft member 83a and a third supporting member 83b. The third shaft member 83a corresponds to the “shaft member” in the present disclosure, and the third supporting member 83b corresponds to the “supporting member” in the present disclosure.

[0138] The third shaft member 83a is made of steel. The third shaft member 83a has a main body 831 and a pair of contact portions 833. The main body 831 has the same configuration as that of the main body 811 in the compressor of the first embodiment, except that the axial length of the main body 831 is greater than that of the main body 811. That is, the outer diameter of the main body 831 is the first length L1.

[0139] Each of the contact portions 833 is formed integrally with the main body 831. Other configurations of each of the contact portions 833 are the same as those of each of the contact portions 813 in the compressor of the first embodiment. That is, the outer diameter of each of the contact portions 833 is the second length L2. The configuration of the third supporting member 83b is the same as that of the first supporting member 81b in the compressor of the first embodiment. That is, the outer diameter of the third supporting member 83b is the third length L3.

[0140] The third shaft member 83a of the third restricting body 83 is inserted into the attachment hole 17f from the front thereof. Here, in the third restricting body 83, the third supporting member 83b is inserted into the attachment hole 17f while elastically deforming in the radial direction of the housing 6. In the third restricting body 83, the main body 831 is inserted through the communication hole 643 and into the fixing hole 617 in this order, and is fixed to the fixing hole 617.

[0141] Thus, in this compressor, the first housing cover 61, the projection body 64, and the stator 17 are coupled to each other in the direction in which the driving axis O1 extends by the third restricting body 83. Accordingly, also in this compressor, the projection body 64 is restricted from rotating relative to the holding portion 61b, and by extension, the first housing cover 61.

[0142] In the third restricting body 83, the third supporting member 83b elastically deforms in the attachment hole 17f, so that the third supporting member 83b elastically supports the third shaft member 83a in the attachment hole 17f. Other components of this compressor are the same as those of the compressor of the first embodiment, and identical components have the same reference numerals and may not be reiterated.

[0143] Also in this compressor, similarly to the compressor of the first embodiment, heat of the projection body 64 is hardly transferred to the housing 6, and vibrations are hardly transmitted from the projection body 64 to the first housing cover 61.

[0144] Although not illustrated in detail, also in this compressor, when the projection body 64 is inclined at an angle equal to or larger than a predetermined angle in the scroll chamber 65 by load applied to the projection body 64, the stator 17 is also inclined integrally with the projection body 64. Accordingly, also in this compressor, when the load equal to or greater than a predetermined value is applied to the projection body 64, which inclines the projection body 64 and the stator 17 at the angle equal to or larger than the predetermined angle, one of the contact portions 833 of the third restricting body 83 is in contact with the inner peripheral surface of the attachment hole 17f. Here, since the extension member 17d is made of metal, also in this compressor, the one of the contact portions 833 and the inner peripheral surface of the attachment hole 17f may be in metal-to-metal contact with each other. As a result, this compressor is also capable of providing the same effects of the first embodiment.

[0145] Although the present disclosure has been described above based on the first to third embodiments, the present disclosure is not limited to the first to third embodiments, and may be modified within the scope of the present disclosure.

[0146] For example, in the compressor of the first embodiment, the stator core 17a is fixed to the projection body 64. However, the present disclosure is not limited thereto, and the rotor 11 may be disposed between the stator 17 and the projection body 64 by fixing the stator core 17a to the inner peripheral surface of the housing main body 60. The same applies to the compressor of the third embodiment.

[0147] In the compressor of the first embodiment, the first shaft member 81a has the two contact portions 813. However, the present disclosure is not limited thereto, and the first shaft member 81a may have only one of the two contact portions 813. The same applies to the compressors of the second and third embodiments.

[0148] In the compressor of the first embodiment, the first shaft member 81a of the first restricting body 81 is inserted through the attachment hole 641 and into the fixing hole 617 from the rear thereof by forming the attachment hole 641 in the distal end portion 616 of the holding portion 61b and forming the fixing hole 617 in the second diameter portion 64b of the projection body 64.

[0149] In the compressor of the second embodiment, the second shaft member 82a of the second restricting body 82 may be inserted through the attachment hole 610c and into the fixing hole 17c from the front thereof by forming the attachment hole 610c in the stator core 17a and forming the fixing hole 17c in the cover main body 61a.

[0150] In the compressor of the third embodiment, the third shaft member 83a of the third restricting body 83 may be inserted through the attachment hole 17f and the communication hole 643 and into the fixing hole 617 from the rear thereof by forming the attachment hole 17f in the distal end portion 616 and forming the fixing hole 617 in the extension member 17d.

[0151] In the compressor of the third embodiment, the stator 17 may be attached to the projection body 64 by fitting the stator core 17a to the second diameter portion 64b with a clearance therebetween.

[0152] In the compressor of the first embodiment, the one-side elastic body 70 includes the first to third elastic bodies 70a to 70c. However, the present disclosure is not limited thereto, and the one-side elastic body 70 may be configured as a single cylindrical member extending in the direction in which the driving axis O1 extends. The same applies to the compressors of the second and third embodiments.

[0153] In the compressor of the first embodiment, the one-side elastic body 70 may be disposed between the second diameter portion 64b and the base end portion 615 in the direction in which the driving axis O1 extends. The same applies to the compressors of the second and third embodiments.

[0154] In the compressor of the first embodiment, the one-side elastic body 70 may be omitted. The same applies to the compressors of the second and third embodiments.

[0155] In the compressor of the first embodiment, the first radial ball bearing 51 may be fitted to the first diameter portion 64a of the projection body 64, and the first radial ball bearing 51 may be fitted into the inner tubular portion 37b of the cover body 37 with a clearance between. In addition, the plain bearing 13 may be fitted into the accommodation recess 15, and the bushing 53 may be fitted to the plain bearing 13 with a clearance therebetween. The same applies to the compressors of the second and third embodiments.

[0156] In the compressor of the first embodiment, the projection body 64 may be made of a material other than steel, such as an aluminum alloy. The same applies to the compressors of the second and third embodiments.

[0157] In the compressor of the first embodiment, the holding portion 61b is formed integrally with the cover main body 61a. However, the present disclosure is not limited thereto, and the holding portion 61b may be formed separately from the cover main body 61a, and the holding portion 61b may be fixed to the cover main body 61a. In this case, the holding portion 61b and the cover main body 61a are easily made of different materials. The same applies to the compressors of the second and third embodiments.

[0158] In the compressor of the first embodiment, the first diameter portion 64a and the second diameter portion 64b of the projection body 64 are formed integrally with each other. However, the present disclosure is not limited thereto, the first diameter portion 64a may be formed separately from the second diameter portion 64b, and the first diameter portion 64a may be fixed to the second diameter portion 64b. The projection body 64 may only have the first diameter portion 64a or the second diameter portion 64b. The same applies to the compressors of the second and third embodiments.

[0159] In the compressor of the first embodiment, the housing 6 includes the housing main body 60, the first housing cover 61, and the second housing cover 62. However, the housing 6 is not limited thereto, and may have other configurations. The same applies to the compressors of the second and third embodiments.

[0160] This specification includes the following disclosure.Supplementary Note 1

[0161] A co-rotating scroll compressor including:

[0162] a housing; a driving scroll; a driven scroll; a driving mechanism; and a driven mechanism,

[0163] the housing having a scroll chamber in which the driving scroll, the driven scroll, and the driving mechanism are accommodated,

[0164] the driving mechanism having a stator and a rotor that is rotationally driven by the stator,

[0165] the driving scroll being driven rotationally about a driving axis by the driving mechanism,

[0166] the driven scroll being eccentric to the driving scroll and being driven rotationally about a driven axis by the driving scroll and the driven mechanism to follow the driving scroll, and

[0167] the driving scroll and the driven scroll forming a compression chamber in which fluid is compressed by the rotational driving of the driving scroll and the rotational following of the driven scroll, characterized in that a projection body and a restricting body are provided in the scroll chamber,

[0168] the projection body extends toward the driving scroll and the driven scroll in a direction in which the driving axis extends, is formed separately from the housing, and is attached to the housing with a gap between the projection body and the housing,

[0169] the restricting body restricts the projection body from rotating relative to the housing,

[0170] the driving scroll is supported rotatably about the driving axis by the projection body,

[0171] the driven scroll is supported rotatably about the driven axis by the projection body,

[0172] the restricting body has:

[0173] a shaft member that is inserted into the projection body and the housing; and

[0174] a supporting member that is provided on an outer peripheral surface of the shaft member, and

[0175] the supporting member supports the shaft member while elastically deforming between the shaft member and a specific member that is one of the projection body and the housing.Supplementary Note 2

[0176] A co-rotating scroll compressor including:

[0177] a housing; a driving scroll; a driven scroll; a driving mechanism; and a driven mechanism,

[0178] the housing having a scroll chamber in which the driving scroll, the driven scroll, and the driving mechanism are accommodated,

[0179] the driving mechanism having a stator and a rotor that encloses the stator and that is rotationally driven by the stator,

[0180] the driving scroll being driven rotationally about a driving axis by the driving mechanism,

[0181] the driven scroll being eccentric to the driving scroll and being driven rotationally about a driven axis by the driving scroll and the driven mechanism to follow the driving scroll, and

[0182] the driving scroll and the driven scroll forming a compression chamber in which fluid is compressed by the rotational driving of the driving scroll and the rotational following of the driven scroll, characterized in that a projection body and a restricting body are provided in the scroll chamber,

[0183] the projection body extends toward the driving scroll and the driven scroll in a direction in which the driving axis extends, is formed separately from the housing, and is attached to the housing with a gap between the projection body and the housing,

[0184] the restricting body restricts the projection body from rotating relative to the housing,

[0185] the stator is attached to the projection body,

[0186] the driving scroll is supported rotatably about the driving axis by the projection body,

[0187] the driven scroll is supported rotatably about the driven axis by the projection body,

[0188] the restricting body has:

[0189] a shaft member that is inserted into the housing and the stator; and

[0190] a supporting member that is provided on an outer peripheral surface of the shaft member, and

[0191] the supporting member supports the shaft member while elastically deforming between the shaft member and a specific member that is one of the housing and the stator.Supplementary Note 3

[0192] A co-rotating scroll compressor including:

[0193] a housing; a driving scroll; a driven scroll; a driving mechanism; and a driven mechanism,

[0194] the housing having a scroll chamber in which the driving scroll, the driven scroll, and the driving mechanism are accommodated,

[0195] the driving mechanism having a stator and a rotor that is rotationally driven by the stator,

[0196] the driving scroll being driven rotationally about a driving axis by the driving mechanism,

[0197] the driven scroll being eccentric to the driving scroll and being driven rotationally about a driven axis by the driving scroll and the driven mechanism to follow the driving scroll, and

[0198] the driving scroll and the driven scroll forming a compression chamber in which fluid is compressed by the rotational driving of the driving scroll and the rotational following of the driven scroll, characterized in that

[0199] a projection body and a restricting body are provided in the scroll chamber,

[0200] the projection body extends toward the driving scroll and the driven scroll in a direction in which the driving axis extends, is formed separately from the housing, and is attached to the housing with a gap between the projection body and the housing,

[0201] the restricting body restricts the projection body from rotating relative to the housing,

[0202] the driving scroll is supported rotatably about the driving axis by the projection body,

[0203] the driven scroll is supported rotatably about the driven axis by the projection body,

[0204] the restricting body has:

[0205] a shaft member that is inserted into the housing, the projection body, and the stator; and

[0206] a supporting member that is provided on an outer peripheral surface of the shaft member, and

[0207] the supporting member supports the shaft member while elastically deforming between the shaft member and a specific member that is one of the housing, the projection body, and the stator.Supplementary Note 4

[0208] The co-rotating scroll compressor according to any one of supplementary notes 1 to 3, characterized in that

[0209] the housing, the projection body, and the stator are each made of metal,

[0210] the specific member has an attachment hole through which the restricting body is inserted,

[0211] the shaft member has a main body that is inserted through the supporting member and a contact portion that is made of metal and that is located inside the attachment hole by inserting the restricting body through the attachment hole,

[0212] the supporting member is located in the attachment hole and is in contact with an inner peripheral surface of the attachment hole while elastically deforming by inserting the restricting body through the attachment hole,

[0213] when load applied to the projection body is less than a value set in advance, the contact portion is spaced apart from the inner peripheral surface, and

[0214] when load applied to the projection body is equal to or greater than the value set in advance, the contact portion is in contact with the inner peripheral surface.Supplementary Note 5

[0215] The co-rotating scroll compressor according to supplementary note 4, characterized in that

[0216] an outer diameter of the main body is a first length less than an inner diameter of the attachment hole,

[0217] an outer diameter of the contact portion is a second length greater than the first length and smaller than the inner diameter of the attachment hole, and

[0218] an outer diameter of the supporting member is a third length greater than the second length.Supplementary Note 6

[0219] The co-rotating scroll compressor according to any one of supplementary notes 1 to 5, characterized in that

[0220] an elastic body that supports the projection body while elastically deforming is provided between the projection body and the housing, and

[0221] the restricting body is located at a position closer to the compression chamber than at least a part of the elastic body in the direction in which the driving axis extends.Supplementary Note 7

[0222] The co-rotating scroll compressor according to any one of supplementary notes 1 to 6, characterized in that

[0223] the projection body is made of steel.Industrial Applicability

[0224] The present disclosure is applicable to an air conditioner of a vehicle, or the like.

Examples

first embodiment

[0023]As illustrated in FIG. 1, the compressor of the first embodiment includes a housing 6, an electric motor 10, a driving scroll 30, a driven scroll 40, and a driven mechanism 20. The electric motor 10 is an example of the “driving mechanism” in the present disclosure.

[0024]In the present embodiment, a front-rear direction and an up-down direction of the compressor are defined by solid arrows illustrated in FIG. 1. The front-rear direction and the up-down direction are perpendicular to each other. In FIG. 2 and subsequent drawings, the front-rear direction and the up-down direction of the compressor are defined so as to correspond to FIG. 1. Note that these directions are merely examples for the sake of description, and a posture of the compressor may be changed as appropriate depending on a vehicle on which the compressor is mounted.

[0025]As illustrated in FIG. 1, the housing 6 includes a housing main body 60, a first housing cover 61, and a second housing cover 62. The housing ...

second embodiment

[0119]As illustrated in FIG. 5, in the compressor of the second embodiment, an attachment hole 610c is formed in the cover main body 61a of the first housing cover 61, and a fixing hole 17c is formed in the stator core 17a. Unlike the compressor of the first embodiment, in this compressor, the attachment hole 641 is not formed in the second diameter portion 64b, and the fixing hole 617 is not formed in the distal end portion 616.

[0120]The attachment hole 610c is formed in the cover main body 61a outside the holding portion 61b in the radial direction of the housing 6. The attachment hole 610c extends through the cover main body 61a in the direction in which the driving axis O1 extends. As a result, the scroll chamber 65 communicates with the outside of the compressor through the attachment hole 610c. With the attachment hole 610c formed in this manner, the first housing cover 61 of this compressor corresponds to the “specific member” in the present disclosure. Note that although not...

third embodiment

[0132]As illustrated in FIG. 6, in the compressor of the third embodiment, a communication hole 643 is formed in the second diameter portion 64b. The communication hole 643 has the same configuration as that of the attachment hole 641 in the compressor of the first embodiment, and is formed in the second diameter portion 64b so as to be coaxial with the fixing hole 617. The communication hole 643 is formed in a columnar shape, and the inner diameter of the communication hole 643 is greater than each of the first length L1 and the second length L2 and is slightly less than the third length L3. The communication hole 643 extends through the second diameter portion 64b in the direction in which the driving axis O1 extends.

[0133]In this compressor, the stator 17 has an extension member 17d. The extension member 17d is made of a metal plate material, and has a substantially rectangular shape extending in the radial direction of the housing 6. The extension member 17d is fixed to the stat...

CROSS-REFERENCE TO RELATED APPLICATION

[0001] This application claims priority to Japanese Patent Application No. 2025-049848 filed on Mar. 25, 2025, the entire disclosure of which is incorporated herein by reference.BACKGROUND ART

[0002] The present disclosure relates to a co-rotating scroll compressor.

[0003] Japanese Patent Application Publication No. H02-227575 discloses a conventional co-rotating scroll compressor (hereinafter, simply and appropriately referred to as a compressor). This compressor includes a housing, a driving scroll, a driven scroll, a driving mechanism, and a driven mechanism. The housing has a scroll chamber in which the driving mechanism, the driving scroll, and the driven scroll are accommodated. Fluid is sucked into the scroll chamber from the outside of the housing. Specifically, the fluid in the Publication is a refrigerant.

[0004] The driving mechanism includes a stator and a rotor. The stator is formed in a tubular shape and is fixed to the housing at the outer periphery of the stator. The rotor is disposed radially inside the stator. The driving scroll has an extending portion formed in a tubular shape. The rotor is fixed to the outer peripheral surface of the extending portion. This allows the driving scroll to be driven rotatably about a driving axis with rotation of the rotor. The driven scroll is eccentric to the driving scroll and is driven rotatably about a driven axis by the driving scroll and the driven mechanism to follow the driving scroll. These driving scroll and driven scroll form a compression chamber in which the fluid is compressed by the rotational driving of the driving scroll and the rotational following of the driven scroll.

[0005] In this compressor, a projection body is formed integrally with the housing. The projection body is formed in a substantially columnar shape with a constant outer diameter and extends toward the driving scroll and the driven scroll in a direction in which the driving axis extends in the scroll chamber. The projection body extends into the extending portion, and rotatably supports the extending portion, and by extension, the driving scroll via a bearing. A fluid passage is formed through the projection body so as to extend in the direction in which the driving axis extends. The fluid passage communicates with the compression chamber at one end of the fluid passage in the direction in which the driving axis extends, and communicates with the outside of the housing at the other end of the fluid passage in the direction in which the driving axis extends.

[0006] In this compressor, the fluid in the scroll chamber is sucked into the compression chamber, and then, is compressed in the compression chamber. The fluid compressed in the compression chamber is discharged to the outside of the housing, that is, to the outside of the compressor through the fluid passage.

[0007] In the above-described conventional compressor, the driving scroll has the extending portion rotatably supported by the projection body. With this configuration in the compressor, a temperature of the projection body is increased due to friction between the projection body and the rotating extending portion.

[0008] Furthermore, in this compressor, since the extending portion is rotatably supported by the projection body, vibrations generated in the driving scroll during the operation of the compressor are transmitted to the projection body through the extending portion.

[0009] Here, in this compressor, since the projection body is formed integrally with the housing, when the temperature of the projection body is increased as described above, heat of the projection body is easily transferred to the entire housing. Accordingly, in this compressor, there is concern that durability of the housing is decreased due to the heat. Furthermore, in this compressor, the projection body is formed integrally with the housing, which easily transmits vibrations from the projection body to the entire housing. Thus, the housing is susceptible to the vibrations during operation of the compressor. As a result, quietness of this compressor is decreased.

[0010] The present disclosure is made in light of the above-described conventional circumstances, and is directed to providing a co-rotating scroll compressor having excellent durability and quietness.SUMMARY

[0011] In accordance with a first aspect of the present disclosure, there is provided a co-rotating scroll compressor that includes a housing; a driving scroll; a driven scroll; a driving mechanism; and a driven mechanism, the housing having a scroll chamber in which the driving scroll, the driven scroll, and the driving mechanism are accommodated, the driving mechanism having a stator and a rotor that is rotationally driven by the stator, the driving scroll being driven rotationally about a driving axis by the driving mechanism, the driven scroll being eccentric to the driving scroll and being driven rotationally about a driven axis by the driving scroll and the driven mechanism to follow the driving scroll, and the driving scroll and the driven scroll forming a compression chamber in which fluid is compressed by the rotational driving of the driving scroll and the rotational following of the driven scroll. A projection body and a restricting body are provided in the scroll chamber. The projection body extends toward the driving scroll and the driven scroll in a direction in which the driving axis extends, is formed separately from the housing, and is attached to the housing with a gap between the projection body and the housing. The restricting body restricts the projection body from rotating relative to the housing. The driving scroll is supported rotatably about the driving axis by the projection body. The driven scroll is supported rotatably about the driven axis by the projection body. The restricting body has a s haft member that is inserted into the projection body and the housing and a supporting member that is provided on an outer peripheral surface of the shaft member. The supporting member supports the shaft member while elastically deforming between the shaft member and a specific member that is one of the projection body and the housing.

[0012] In accordance with a second aspect of the present disclosure, there is provided a co-rotating scroll compressor that includes a housing; a driving scroll; a driven scroll; a driving mechanism; and a driven mechanism, the housing having a scroll chamber in which the driving scroll, the driven scroll, and the driving mechanism are accommodated, the driving mechanism having a stator and a rotor that encloses the stator and that is rotationally driven by the stator, the driving scroll being driven rotationally about a driving axis by the driving mechanism, the driven scroll being eccentric to the driving scroll and being driven rotationally about a driven axis by the driving scroll and the driven mechanism to follow the driving scroll, and the driving scroll and the driven scroll forming a compression chamber in which fluid is compressed by the rotational driving of the driving scroll and the rotational following of the driven scroll. A projection body and a restricting body are provided in the scroll chamber. The projection body extends toward the driving scroll and the driven scroll in a direction in which the driving axis extends, is formed separately from the housing, and is attached to the housing with a gap between the projection body and the housing. The restricting body restricts the projection body from rotating relative to the housing. The stator is attached to the projection body. The driving scroll is supported rotatably about the driving axis by the projection body. The driven scroll is supported rotatably about the driven axis by the projection body. The restricting body has a shaft member that is inserted into the housing and the stator and a supporting member that is provided on an outer peripheral surface of the shaft member. The supporting member supports the shaft member while elastically deforming between the shaft member and a specific member that is one of the housing and the stator.

[0013] In accordance with a third aspect of the present disclosure, there is provided a co-rotating scroll compressor that includes a housing; a driving scroll; a driven scroll; a driving mechanism; and a driven mechanism, the housing having a scroll chamber in which the driving scroll, the driven scroll, and the driving mechanism are accommodated, the driving mechanism having a stator and a rotor that is rotationally driven by the stator, the driving scroll being driven rotationally about a driving axis by the driving mechanism, the driven scroll being eccentric to the driving scroll and being driven rotationally about a driven axis by the driving scroll and the driven mechanism to follow the driving scroll, and the driving scroll and the driven scroll forming a compression chamber in which fluid is compressed by the rotational driving of the driving scroll and the rotational following of the driven scroll. A projection body and a restricting body are provided in the scroll chamber. The projection body extends toward the driving scroll and the driven scroll in a direction in which the driving axis extends, is formed separately from the housing, and is attached to the housing with a gap between the projection body and the housing. The restricting body restricts the projection body from rotating relative to the housing. The driving scroll is supported rotatably about the driving axis by the projection body. The driven scroll is supported rotatably about the driven axis by the projection body. The restricting body has a s haft member that is inserted into the housing, the projection body, and the stator and a supporting member that is provided on an outer peripheral surface of the shaft member. The supporting member supports the shaft member while elastically deforming between the shaft member and a specific member that is one of the housing, the projection body, and the stator.

[0014] Other aspects and advantages of the disclosure will become apparent from the following description, taken in conjunction with the accompanying drawings, illustrating by way of example the principles of the disclosure.BRIEF DESCRIPTION OF DRAWINGS

[0015] The disclosure, together with objects and advantages thereof, may best be understood by reference to the following description of the embodiments together with the accompanying drawings in which:

[0016] FIG. 1 is a cross-sectional view of a compressor according to a first embodiment;

[0017] FIG. 2 is an enlarged cross-sectional view of the compressor according to the first embodiment, illustrating its main part including a projection body, a holding portion, an elastic body, and a restricting body;

[0018] FIG. 3 is an enlarged cross-sectional view of the compressor according to the first embodiment, illustrating its main part including the projection body and the restricting body;

[0019] FIG. 4 is an enlarged cross-sectional view of the compressor according to the first embodiment, illustrating its main part including the projection body and the restricting body when load equal to or greater than a set value is applied to the projection body;

[0020] FIG. 5 is an enlarged cross-sectional view of a compressor according to a second embodiment, illustrating its main part including a projection body, a holding portion, an elastic body, and a restricting body; and

[0021] FIG. 6 is an enlarged cross-sectional view of a compressor according to a third embodiment, illustrating its main part including a projection body, a holding portion, an elastic body, and a restricting body.DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The following will describe first to third embodiments according to the present disclosure with reference to the accompanying drawings. A compressor of each of the first to third embodiments is mounted on a vehicle, which is not illustrated, and is a part of an air conditioner of the vehicle.First Embodiment

[0023] As illustrated in FIG. 1, the compressor of the first embodiment includes a housing 6, an electric motor 10, a driving scroll 30, a driven scroll 40, and a driven mechanism 20. The electric motor 10 is an example of the “driving mechanism” in the present disclosure.

[0024] In the present embodiment, a front-rear direction and an up-down direction of the compressor are defined by solid arrows illustrated in FIG. 1. The front-rear direction and the up-down direction are perpendicular to each other. In FIG. 2 and subsequent drawings, the front-rear direction and the up-down direction of the compressor are defined so as to correspond to FIG. 1. Note that these directions are merely examples for the sake of description, and a posture of the compressor may be changed as appropriate depending on a vehicle on which the compressor is mounted.

[0025] As illustrated in FIG. 1, the housing 6 includes a housing main body 60, a first housing cover 61, and a second housing cover 62. The housing main body 60, the first housing cover 61, and the second housing cover 62 are each made of an aluminum alloy. Note that the housing main body 60, the first housing cover 61, and the second housing cover 62 may be made of steel, or the like.

[0026] The housing main body 60 has a cylindrical shape centered about a driving axis O1 and is open at its front end and rear end. The driving axis O1 is in parallel to the front-rear direction. A suction communication port 68 is formed in the housing main body 60. The suction communication port 68 extends in a radial direction of the housing main body 60. The suction communication port 68 is connected to an evaporator through a pipe. Here, illustration of the evaporator and the pipe are omitted.

[0027] The first housing cover 61 is located at the rear end of the housing main body 60. The first housing cover 61 has a cover main body 61a and a holding portion 61b. The cover main body 61a has a substantially disc shape centered about the driving axis O1 and extends in the radial direction of the housing 6. The cover main body 61a has a front surface 610a that is oriented forward and a rear surface 610b that is located opposite to the front surface 610a and oriented rearward.

[0028] The holding portion 61b is formed integrally with the cover main body 61a. The holding portion 61b has a columnar shape extending forward from the front surface 610a of the cover main body 61a in a direction in which the driving axis O1 extends. The holding portion 61b includes a base end portion 615 and a distal end portion 616.

[0029] As illustrated in FIG. 2, the base end portion 615 corresponds to a rear end portion of the holding portion 61b and is connected to the cover main body 61a. The distal end portion 616 is connected to the base end portion 615 and extends forward from the base end portion 615. The distal end portion 616 is formed in a columnar shape with a diameter smaller than that of the base end portion 615.

[0030] The holding portion 61b has three holding grooves 611 to 613. More specifically, the holding grooves 611 to 613 are recessed in an outer peripheral surface 616a of the distal end portion 616 and each have an annular shape extending around the outer peripheral surface 616a. The holding grooves 611 to 613 are arranged in this order from a rear portion of the distal end portion 616 toward a front portion of the distal end portion 616. These holding grooves 611 to 613 are arranged at equal intervals in the direction in which the driving axis O1 extends.

[0031] The distal end portion 616 also has a fixing hole 617. As illustrated in FIG. 3, the fixing hole 617 extends in the distal end portion 616 in the direction in which the driving axis O1 extends and is open in a front end surface 616b of the distal end portion 616. Here, the fixing hole 617 does not extend through the distal end portion 616, that is, the holding portion 61b in the direction in which the driving axis O1 extends.

[0032] As illustrated in FIG. 2, a one-side elastic body 70 is formed in the distal end portion 616. The one-side elastic body 70 is an example of the “elastic body” in the present disclosure. The one-side elastic body 70 includes a first elastic body 70a, a second elastic body 70b, and a third elastic body 70c.

[0033] These first to third elastic bodies 70a to 70c are made of elastically deformable resin, such as synthetic rubber. These first to third elastic bodies 70a to 70c are formed separately from each other. These first to third elastic bodies 70a to 70c each have an annular shape with the same outer diameter. Note that the first to third elastic bodies 70a to 70c, that is, the one-side elastic body 70 may be made of metal, or the like, having rigidity lower than that of the first housing cover 61.

[0034] The first elastic body 70a is accommodated in the holding groove 611. The second elastic body 70b is accommodated in the holding groove 612. The third elastic body 70c is accommodated in the holding groove 613. Thus, the first to third elastic bodies 70a to 70c, that is, the one-side elastic body 70 is attached to the distal end portion 616. In the distal end portion 616, the third elastic body 70c is disposed in front of the first elastic body 70a and the second elastic body 70b in the direction in which the driving axis O1 extends.

[0035] As illustrated in FIG. 2, a projection body 64 is attached to the first housing cover 61. The projection body 64 is made of steel. The projection body 64 has a first diameter portion 64a and a second diameter portion 64b. The first diameter portion 64a corresponds to a front portion of the projection body 64. A pin hole 4 is formed in the first diameter portion 64a. The pin hole 4 extends in the first diameter portion 64a in the direction in which the driving axis O1 extends and is open in the front end surface of the first diameter portion 64a.

[0036] A first radial ball bearing 51 is provided on the outer peripheral surface of the first diameter portion 64a. Although not illustrated in detail, the first radial ball bearing 51 is fitted to the outer peripheral surface of the first diameter portion 64a with a clearance therebetween. Instead of the first radial ball bearing 51, a plain bearing may be provided on the outer peripheral surface of the first diameter portion 64a.

[0037] The second diameter portion 64b is integrated with the first diameter portion 64a at the front end of the second diameter portion 64b. Thus, the second diameter portion 64b corresponds to a rear portion of the projection body 64. The second diameter portion 64b is formed in a bottomed tubular shape with an outer diameter larger than that of the first diameter portion 64a and is open at the rear end of the second diameter portion 64b. Here, an inner diameter of the second diameter portion 64b is larger than the outer diameter of the distal end portion 616 of the holding portion 61b, and is slightly smaller than the outer diameter of the one-side elastic body 70, that is, the outer diameter of each of the first to third elastic bodies 70a to 70c.

[0038] As illustrated in FIG. 3, an attachment hole 641 is formed in the second diameter portion 64b. More specifically, the attachment hole 641 is formed in the second diameter portion 64b so as to be coaxial with the fixing hole 617. The attachment hole 641 has a columnar shape and extends through the second diameter portion 64b in the direction in which the driving axis O1 extends. In more detail, the inner diameter of the attachment hole 641 is greater than each of a first length L1 and a second length L2, and is slightly less than a third length L3. These lengths L1 to L3 will be described later. With the attachment hole 641 formed in the second diameter portion 64b in this manner, the projection body 64 of this compressor corresponds to the “specific member” in the present disclosure.

[0039] As illustrated in FIG. 2, the distal end portion 616 and the one-side elastic body 70 are inserted into the second diameter portion 64b of the projection body 64. That is, the distal end portion 616 is located inside the second diameter portion 64b. As described above, since the inner diameter of the second diameter portion 64b is smaller than the outer diameter of the one-side elastic body 70, the one-side elastic body 70, that is, the first to third elastic bodies 70a to 70c elastically deform in the radial direction of the housing 6 and are located between the distal end portion 616 and the second diameter portion 64b.

[0040] When the distal end portion 616 is located inside the second diameter portion 64b in this manner, the attachment hole 641 is located in front of the fixing hole 617. The attachment hole 641 and the fixing hole 617 are coaxially aligned with each other in the direction in which the driving axis O1 extends.

[0041] Thus, the projection body 64 is attached to the first housing cover 61 via the one-side elastic body 70. The holding portion 61b holds the projection body 64 from the inside of the projection body 64 via the one-side elastic body 70. That is, the first housing cover 61 supports the projection body 64.

[0042] Here, in a state where the projection body 64 is attached to the first housing cover 61, the second diameter portion 64b is spaced apart from the base end portion 615 of the holding portion 61b and is located in front of the base end portion 615. That is, the second diameter portion 64b and the base end portion 615 are not in contact with each other. Furthermore, the one-side elastic body 70 is located between the second diameter portion 64b and the distal end portion 616 of the holding portion 61b, so that the second diameter portion 64b is also spaced apart from the distal end portion 616. Thus, the projection body 64 is attached to the first housing cover 61 with a gap therebetween.

[0043] In a state where the projection body 64 is attached to the first housing cover 61 in this manner, in this compressor, a first restricting body 81 is provided in the projection body 64 and the holding portion 61b. The first restricting body 81 is an example of the “restricting body” in the present disclosure.

[0044] As illustrated in FIG. 3, the first restricting body 81 has a first shaft member 81a and a first supporting member 81b. The first shaft member 81a is an example of the “shaft member” in the present disclosure, and the first supporting member 81b is an example of the “supporting member” of the present disclosure.

[0045] The first shaft member 81a is made of steel. The first shaft member 81a has a main body 811 and a pair of contact portions 813. The main body 811 has a columnar shape extending in the direction in which the driving axis O1 extends. The outer diameter of the main body 811 is the first length L1. The first length L1 is less than each of the second length L2 and the third length L3. That is, the outer diameter of the main body 811 is smaller than the inner diameter of the attachment hole 641.

[0046] The contact portions 813 are formed integrally with the main body 811. The contact portions 813 are spaced apart from each other in the direction in which the driving axis O1 extends. The contact portions 813 each have a disk shape with the outer diameter of the second length L2. The second length L2 is greater than the first length L1, and is slightly less than the third length L3. Accordingly, the outer diameter of each of the contact portions 813 is larger than the outer diameter of the main body 811, and each of the contact portions 813 of the first shaft member 81a has a flange shape protruding from the main body 811 outwardly in the radial direction of the housing 6. On the other hand, the outer diameter of each of the contact portions 813 is smaller than the inner diameter of the attachment hole 641. Note that the main body 811 may be made of resin as long as the contact portions 813 are made of metal.

[0047] The first supporting member 81b is made of elastically deformable resin, such as synthetic rubber. The first supporting member 81b is formed in an annular shape. Here, the outer diameter of the first supporting member 81b is the third length L3. This third length L3 is greater than each of the first length L1 and the second length L2, and is slightly greater than the inner diameter of the attachment hole 641. Accordingly, the outer diameter of the first supporting member 81b is larger than each of the inner diameter of the attachment hole 641 and the outer diameters of the contact portions 813. On the other hand, the inner diameter of the first supporting member 81b is the first length L1.

[0048] The first supporting member 81b is disposed between the contact portions 813 with the main body 811 inserted through the first supporting member 81b. Thus, the first supporting member 81b is attached to the first shaft member 81a in a state where the first supporting member 81b is restricted by the contact portions 813 from moving in the direction in which the driving axis O1 extends. The outer diameter of the first supporting member 81b is larger than the outer diameter of each of the contact portions 813, so that the first supporting member 81b extends out of the contact portions 813 in the radial direction of the housing 6 in a state where the first supporting member 81b is attached to the first shaft member 81a.

[0049] The first restricting body 81 is inserted through the attachment hole 641 from the front thereof. Here, since the outer diameter of the first supporting member 81b is larger than the inner diameter of the attachment hole 641, the first supporting member 81b is inserted into the attachment hole 641 while elastically deforming in the radial direction of the housing 6. As a result, the first supporting member 81b elastically supports the first shaft member 81a in the attachment hole 641. The rear portion of the main body 811 of the first restricting body 81 is inserted into the fixing hole 617 and fixed to the fixing hole 617.

[0050] Thus, the first restricting body 81 is provided in the projection body 64 and the holding portion 61b, so that the projection body 64 and the holding portion 61b are connected to each other in the direction in which the driving axis O1 extends. As a result, the projection body 64 is restricted from rotating relative to the holding portion 61b, and by extension, the first housing cover 61.

[0051] As described above, since the outer diameter of each of the contact portions 813 is smaller than the inner diameter of the attachment hole 641, the contact portions 813 are located in the attachment hole 641 in the state where the first restricting body 81 is provided in the projection body 64 and the holding portion 61b. In this compressor, in a state where load applied to the projection body 64 is less than a value set in advance, including a state where the operation of the compressor is stopped, the contact portions 813 are spaced apart from the inner peripheral surface of the attachment hole 641 in the radial direction of the housing 6. That is, in the state where the load applied to the projection body 64 is less than the set value, the contact portions 813 are not in contact with the inner peripheral surface of the attachment hole 641, and by extension, the second diameter portion 64b. Furthermore, the main body 811, which has the outer diameter smaller than the outer diameter of each of the contact portions 813, is also not in contact with the second diameter portion 64b. Details of the load applied to the projection body 64 will be described later.

[0052] As illustrated in FIG. 1, the second housing cover 62 is disposed in front of the housing main body 60. The second housing cover 62 has a substantially disc shape centered about the driving axis O1 and extends in the radial direction of the housing 6. The second housing cover 62 has a front surface 62a that is oriented forward and a rear surface 62b that is located opposite to the front surface 62a and oriented rearward.

[0053] A supporting portion 66 and a discharge communication port 69 are formed in the second housing cover 62. The supporting portion 66 is formed integrally with the rear surface 62b substantially at a center thereof and protrudes rearward from the rear surface 62b. The supporting portion 66 is formed in a cylindrical shape centered about the driving axis O1 and has therein a second radial ball bearing 52, an other-side elastic body 67, and a shaft sealing member 63.

[0054] The other-side elastic body 67 is made of elastically deformable resin, such as synthetic rubber, and has a cylindrical shape. The other-side elastic body 67 is provided between the supporting portion 66 and the second radial ball bearing 52, encloses the second radial ball bearing 52, and holds the second radial ball bearing 52 in the supporting portion 66. Note that the other-side elastic body 67 may be made of metal, or the like, having rigidity lower than that of the second housing cover 62. The thickness of the other-side elastic body 67 may be designed as appropriate. In addition, a plain bearing may be provided inside the supporting portion 66, instead of the second radial ball bearing 52.

[0055] The shaft sealing member 63 is disposed in front of the second radial ball bearing 52 and the other-side elastic body 67 inside the supporting portion 66. The shaft sealing member 63 is formed in an annular shape.

[0056] The discharge communication port 69 extends through the second housing cover 62 in the direction in which the driving axis O1 extends and communicates with the inside of the supporting portion 66. The discharge communication port 69 is connected to a condenser through a pipe. Here, illustrations of the condenser and the pipe are omitted.

[0057] In the housing 6, the front surface 610a of the first housing cover 61 is in contact with the rear end of the housing main body 60, and the rear surface 62b of the second housing cover 62 is in contact with the front end of the housing main body 60. The housing main body 60, the first housing cover 61, and the second housing cover 62 are fixed with a plurality of bolts, which is not illustrated, in the direction in which the driving axis O1 extends.

[0058] Thus, in the housing 6, the housing main body 60 is held by the first housing cover 61 and the second housing cover 62 in the front-rear direction, and the housing main body 60 is closed by the first housing cover 61 and the second housing cover 62 at the rear end and the front end of the housing main body 60, respectively. As a result, a scroll chamber 65 is formed in the housing main body 60 of the housing 6. The scroll chamber 65 communicates with the suction communication port 68. Accordingly, a refrigerant is introduced into the scroll chamber 65 from the outside of the housing 6 through the suction communication port 68. The refrigerant is an example of the “fluid” in the present disclosure.

[0059] When the projection body 64 is attached to the first housing cover 61 as described above, the projection body 64 is disposed in the scroll chamber 65. Then, in the scroll chamber 65, the projection body 64 extends forward, that is, toward the driving scroll 30 and the driven scroll 40 from the first housing cover 61.

[0060] The electric motor 10 is accommodated in the scroll chamber 65. Accordingly, the scroll chamber 65 serves as a motor chamber in which the electric motor 10 is accommodated.

[0061] As illustrated in FIG. 2, the electric motor 10 includes a stator 17 and a rotor 11. The stator 17 has a stator core 17a and a winding 17b. The stator core 17a is formed of electromagnetic steel sheets and has a cylindrical shape centered about the driving axis O1. The winding 17b is wound around the stator core 17a, thereby forming a first coil end 171 and a second coil end 172.

[0062] The stator core 17a of the stator 17 is fitted onto the outer peripheral surface of the second diameter portion 64b. Thus, the stator core 17a is fixed and attached to the outer peripheral surface of the second diameter portion 64b, and by extension, the outer peripheral surface of the projection body 64. Although not illustrated, a plurality of slits extending in the direction in which the driving axis O1 extends is formed in the inner peripheral surface of the stator core 17a. Accordingly, the slits make spaces between the stator core 17a and the outer peripheral surface of the second diameter portion 64b in a state where the stator core 17a is fixed to the second diameter portion 64b. The stator core 17a may be attached to the projection body 64 by a method other than fitting.

[0063] The rotor 11 has a cylindrical shape centered about the driving axis O1. Although not illustrated in detail, the rotor 11 has a plurality of permanent magnets corresponding to the stator 17 and stacking steel plates for fixing the permanent magnets. The diameter of the rotor 11 is larger than that of the stator core 17a. That is, the rotor 11 encloses the stator core 17a in the scroll chamber 65. A plurality of first bolt holes 11a is formed in the rotor 11. The first bolt holes 11a extend through the rotor 11 in the direction in which the driving axis O1 extends.

[0064] As illustrated in FIG. 1, the driving scroll 30 is accommodated in the scroll chamber 65. The driving scroll 30 is made of an aluminum alloy. The driving scroll 30 has a driving scroll end plate 31, a driving scroll spiral body 33, a driving scroll peripheral wall 35, a cover body 37, and a case 39.

[0065] The driving scroll end plate 31 has a substantially disc shape extending perpendicularly to the driving axis O1 and a driven axis O2. The driven axis O2 extends in parallel to the driving axis O1 while being eccentric to the driving axis O1. That is, the driven axis O2 is also parallel to the front-rear direction. The driving scroll end plate 31 has a first front surface 311 that is oriented forward and a first rear surface 312 that is located opposite to the first front surface 311 and oriented rearward.

[0066] A discharge port 32 is formed in the driving scroll end plate 31. The discharge port 32 extends through the driving scroll end plate 31 in the direction in which the driving axis O1 extends. A discharge reed valve 57 and a retainer 58 are fixed to the first front surface 311 of the driving scroll end plate 31 with a fixing bolt 59. This configuration allows the discharge reed valve 57 to open and close the discharge port 32. The retainer 58 is capable of adjusting an opening degree of the discharge reed valve 57.

[0067] The driving scroll spiral body 33 is integrated with the driving scroll end plate 31 and extends from the first rear surface 312 rearward, that is, toward the driven scroll 40 in parallel to the driving axis O1 and the driven axis O2. Although not illustrated in detail, the driving scroll spiral body 33 has a spiral shape centered about the center of the driving scroll end plate 31 and radially outwardly extending from the center of the spiral shape.

[0068] The driving scroll peripheral wall 35 is formed in a cylindrical shape centered about the driving axis O1 and extending in parallel to the driving axis O1 and the driven axis O2. The driving scroll peripheral wall 35, at the front end thereof, is integrated with the outer peripheral edge of the driving scroll end plate 31. The driving scroll peripheral wall 35 has a cylindrical shape extending rearward from the first rear surface 312 and encloses the driving scroll spiral body 33. Although not illustrated, the outer peripheral end of the spiral of the driving scroll spiral body 33 is connected to the inner peripheral surface of the driving scroll peripheral wall 35.

[0069] The cover body 37 has a wall portion 37a, an inner tubular portion 37b, and an outer tubular portion 37c. The wall portion 37a has a substantially plate shape extending in a radial direction of the driving scroll 30, that is, in the radial direction of the housing 6. The wall portion 37a has a second front surface 371 that is oriented forward and a second rear surface 372 that is located opposite to the second front surface 371 and is oriented rearward.

[0070] A recess 373 and a suction port 374 are formed in the wall portion 37a. The recess 373 is located substantially at a center of the second front surface 371 and recessed rearward in the second front surface 371.

[0071] The suction port 374 is located outside the recess 373 in the radial direction of the housing 6. The suction port 374 extends through the wall portion 37a in the front-rear direction. The suction port 374 is open in the second front surface 371 at the front end of the suction port 374, and is open in the second rear surface 372 at the rear end of the suction port 374. A plurality of the suction ports 374 may be formed in the wall portion 37a.

[0072] A plurality of rings 22 is attached to the wall portion 37a between the recess 373 and the suction port 374. Although not illustrated in detail, the rings 22 are oriented forward and arranged at equal intervals in a circumferential direction of the recess 373 so that the rings 22 surround the recess 373. In the present embodiment, the number of the rings 22 is six. In FIG. 1, one of the six rings 22 is illustrated.

[0073] As illustrated in FIG. 2, the inner tubular portion 37b is located inside the stator 17 in the radial direction of the housing 6 and has a cylindrical shape extending from the second rear surface 372 of the wall portion 37a rearward in the direction in which the driving axis O1 extends. The inner tubular portion 37b communicates with the recess 373 in the direction in which the driving axis O1 extends. The inner diameter of the inner tubular portion 37b is larger than the outer diameter of the first diameter portion 64a of the projection body 64 and has substantially the same diameter as the outer diameter of the first radial ball bearing 51. The outer diameter of the inner tubular portion 37b is smaller than the outer diameter of the second diameter portion 64b.

[0074] The outer tubular portion 37c is connected to the wall portion 37a and has a cylindrical shape extending from the wall portion 37a rearward in the direction in which the driving axis O1 extends. The outer diameter of the outer tubular portion 37c is substantially the same as each of the outer diameter of the wall portion 37a, the outer diameter of the driving scroll peripheral wall 35, and the outer diameter of the rotor 11.

[0075] The inner diameter of the outer tubular portion 37c is larger than the outer diameter of the inner tubular portion 37b. As a result, in the cover body 37, the inner tubular portion 37b is located radially inside the outer tubular portion 37c in a state where the inner tubular portion 37b is spaced apart from the outer tubular portion 37c in the radial direction of the housing 6. Accordingly, the wall portion 37a, the inner tubular portion 37b, and the outer tubular portion 37c form an accommodation portion 38 in the cover body 37. The accommodation portion 38 has a bottomed annular shape that is open at its rear end.

[0076] The suction port 374 formed in the wall portion 37a is located outside the inner tubular portion 37b and inside the outer tubular portion 37c in the radial direction of the housing 6. Accordingly, the suction port 374 communicates with the accommodation portion 38 between the inner tubular portion 37b and the outer tubular portion 37c.

[0077] A plurality of second bolt holes 376 is formed in the outer tubular portion 37c and the wall portion 37a. The second bolt holes 376 extend through the outer tubular portion 37c and the wall portion 37a in the direction in which the driving axis O1 extends. Although not illustrated, the number of the second bolt holes 376 is equal to the number of first bolt holes 11a formed in the rotor 11. In FIGS. 1, 2, 5, and 6, one of the first bolt holes 11a and one of the second bolt holes 376 are illustrated.

[0078] As illustrated in FIG. 1, the second front surface 371 of the wall portion 37a of the cover body 37 is in contact with the rear end of the driving scroll peripheral wall 35. The rotor 11 is in contact with the rear end of the outer tubular portion 37c of the cover body 37. In this state, first bolts 34a are inserted into the corresponding first bolt holes 11a of the rotor 11 and the second bolt holes 376 in this order, and are screwed into the driving scroll peripheral wall 35. Thus, the cover body 37 is held by and fixed to the driving scroll peripheral wall 35 and the rotor 11 in the front-rear direction. As a result, the driving scroll 30 is integrated with the rotor 11.

[0079] The case 39 is a bottomed tubular member, and has an outer peripheral wall 39a and a front wall 39b. The outer peripheral wall 39a has a cylindrical shape centered about the driving axis O1. Here, the outer diameter of the outer peripheral wall 39a is substantially the same as the outer diameter of the driving scroll peripheral wall 35.

[0080] The front wall 39b is located at the front end of the case 39. The front wall 39b has a substantially disc shape extending perpendicularly to the driving axis O1 and the driven axis O2. The front wall 39b is connected to the front end of the outer peripheral wall 39a. A boss 39d is formed in the front wall 39b. A discharge passage 390 is formed in the boss 39d. The discharge passage 390 extends through the boss 39d in the direction in which the driving axis O1 extends.

[0081] Third bolt holes 39e are formed in the outer peripheral wall 39a and the front wall 39b. The third bolt holes 39e extend through the outer peripheral wall 39a and the front wall 39b in the direction in which the driving axis O1 extends. Although not illustrated, a plurality of the third bolt holes 39e is formed in the outer peripheral wall 39a and the front wall 39b. In FIG. 1, one of the third bolt holes 39e is illustrated.

[0082] The rear surface of the outer peripheral wall 39a of the case 39 is in contact with the front end of the driving scroll peripheral wall 35. In this state, second bolts 34b are inserted into the corresponding third bolt holes 39e, and are screwed into the driving scroll peripheral wall 35. Thus, in the driving scroll 30, the case 39 is fixed to the driving scroll peripheral wall 35.

[0083] The case 39 is fixed to the driving scroll peripheral wall 35 in this manner, so that a discharge chamber 14 is formed inside the outer peripheral wall 39a and between the front wall 39b of the case 39 and the driving scroll end plate 31. The discharge chamber 14 communicates with not only the discharge port 32 but also the discharge passage 390.

[0084] The driven scroll 40 is made of an aluminum alloy. The driven scroll 40 has a driven scroll end plate 41 and a driven scroll spiral body 43.

[0085] The driven scroll end plate 41 has a substantially disc shape extending perpendicularly to the driving axis O1 and the driven axis O2. The driven scroll end plate 41 has a third front surface 411 that is oriented forward and a third rear surface 412 that is located opposite to the third front surface 411 and is oriented rearward.

[0086] An accommodation recess 15 is formed in the driven scroll end plate 41. The accommodation recess 15 is located at the center of the driven scroll end plate 41. The accommodation recess 15 is recessed forward in the third rear surface 412 of the driven scroll end plate 41 and has a columnar shape centered about the driven axis O2. Thus, the accommodation recess 15 faces a rear of the driven scroll end plate 41, and by extension, the first diameter portion 64a of the projection body 64.

[0087] A driven shaft portion 16 and a plain bearing 13 are provided in the accommodation recess 15. The driven shaft portion 16 includes a bushing 53 and a driven pin 55. The bushing 53 is accommodated in the accommodation recess 15 via the plain bearing 13. Although not illustrated in detail, the bushing 53 is fitted into the plain bearing 13. The plain bearing 13 is fitted to the accommodation recess 15 with a clearance therebetween.

[0088] The driven pin 55 is inserted in the bushing 53. More specifically, the driven pin 55 is inserted in the bushing 53 at a position eccentric to the center of the bushing 53, that is, the driven axis O2. The driven pin 55 extends rearward out of the bushing 53, and by extension, the driven scroll end plate 41.

[0089] Orbiting pins 21 are each fixed to the driven scroll end plate 41 so as to face a corresponding one of the rings 22. The orbiting pins 21 extend rearward out of the third rear surface 412. Note that the six orbiting pins 21 equal in number to the rings 22 are fixed to the driven scroll end plate 41. In FIG. 1, one of the six orbiting pins 21 is illustrated.

[0090] These orbiting pins 21 and rings 22 form the driven mechanism 20. Here, as long as the number of the orbiting pins 21 and the number of the rings 22 are each three or more, their numbers may be designed as appropriate.

[0091] The driven scroll spiral body 43 is integrated with the driven scroll end plate 41 and extends forward from the third front surface 411 of the driven scroll end plate 41 in parallel to the driving axis O1 and the driven axis O2. The driven scroll spiral body 43 has a spiral shape centered about the center of the driven scroll end plate 41 and radially outwardly extending from the center of the spiral shape.

[0092] In this compressor, the driven scroll 40 is accommodated in the driving scroll 30, more specifically, between the cover body 37 and a set of the driving scroll spiral body 33 and the driving scroll peripheral wall 35 in the driving scroll 30. The driving scroll spiral body 33 is meshed with the driven scroll spiral body 43. Accordingly, the driving scroll spiral body 33 and the driven scroll spiral body 43 face each other to form a compression chamber 12.

[0093] A suction portion 30a is formed between the driving scroll peripheral wall 35 and the driven scroll 40. That is, the driving scroll spiral body 33 and the driven scroll spiral body 43 are located in the suction portion 30a. The suction portion 30a is separated from the scroll chamber 65 by the driving scroll peripheral wall 35 and the cover body 37 and is also separated from the discharge chamber 14 by the driving scroll end plate 31. The suction portion 30a communicates with the suction port 374. Accordingly, the suction portion 30a communicates with the accommodation portion 38 through the suction port 374.

[0094] When the driven scroll 40 is accommodated in the driving scroll 30, the second front surface 371 of the wall portion 37a faces the third rear surface 412 of the driven scroll end plate 41 in the direction in which the driving axis O1 extends. Then, the orbiting pins 21 are located in the corresponding rings 22. Thus, the driving scroll 30 is assembled with the driven scroll 40 in the front-rear direction, so that the driving scroll 30 and the driven scroll 40 form a scroll compression part 100. Technically speaking, after the driving scroll spiral body 33 is meshed with the driven scroll spiral body 43, and the orbiting pins 21 are inserted into the corresponding rings 22, the cover body 37 of the driving scroll 30 is fixed to the driving scroll peripheral wall 35 and the rotor 11.

[0095] This assembly of the driving scroll 30 with the driven scroll 40 allows the accommodation recess 15 of the driven scroll end plate 41 and the driven shaft portion 16 to face the recess 373 of the cover body 37.

[0096] In the scroll chamber 65, the driving scroll 30 is disposed in front of the stator core 17a. As illustrated in FIG. 2, in the driving scroll 30, the inner tubular portion 37b of the cover body 37 is located radially inside the first coil end 171. In this state, the first radial ball bearing 51 is fitted into the inner tubular portion 37b. Thus, the inner tubular portion 37b, and by extension, the cover body 37 is supported rotatably about the driving axis O1 by the first diameter portion 64a of the projection body 64 via the first radial ball bearing 51.

[0097] The cover body 37 is rotatably supported by the first diameter portion 64a in this manner, so that the accommodation portion 38 communicates with the scroll chamber 65. The first coil end 171 is accommodated in the accommodation portion 38. Thus, the first coil end 171 faces the wall portion 37a in the front-rear direction in the accommodation portion 38, and encloses the inner tubular portion 37b in the radial direction of the housing 6. The first coil end 171 is enclosed by the outer tubular portion 37c in the accommodation portion 38 in the radial direction of the housing 6.

[0098] As illustrated in FIG. 1, in the driving scroll 30, the boss 39d of the case 39 is inserted through the second radial ball bearing 52 and the shaft sealing member 63. Here, the boss 39d is fitted into the second radial ball bearing 52. As a result, the boss 39d is supported rotatably about the driving axis O1 by the supporting portion 66 via the second radial ball bearing 52 and the other-side elastic body 67. Thus, the driving scroll 30 is disposed in the scroll chamber 65 and is supported rotatably about the driving axis O1 by the housing 6 via the projection body 64 and the supporting portion 66.

[0099] When the case 39 is supported by the supporting portion 66, the discharge passage 390 faces the discharge communication port 69 from the rear thereof. In this state, the discharge chamber 14 communicates with the discharge communication port 69 through the discharge passage 390. The shaft sealing member 63 provides seal between the scroll chamber 65 and a set of the discharge passage 390 and the discharge communication port 69.

[0100] In the driven scroll 40, the driven pin 55 is inserted in the pin hole 4 of the driven shaft portion 16. As a result, the driven scroll 40 is disposed in front of the projection body 64 and is supported rotatably about the driven axis O2 by the first diameter portion 64a. The driven scroll 40 is rotatably supported by the first diameter portion 64a in this manner, so that the driven scroll 40 is also rotatably supported by the projection body 64 in front of the stator core 17a. That is, the driven scroll 40 is located closer to the compression chamber 12 than the stator core 17a and is supported rotatably about the driven axis O2 by the projection body 64. When the driven pin 55 is inserted into the pin hole 4, the driven scroll 40 is supported rotatably about the driven axis O2 by the first diameter portion 64a, inside the inner tubular portion 37b in the radial direction of the housing 6. Thus, unlike the driving scroll 30, the driven scroll 40 is supported rotatably about the driven axis O2 by the housing 6 only via the projection body 64.

[0101] In this compressor, the stator core 17a, the first radial ball bearing 51, and the bushing 53 of the driven shaft portion 16 are arranged in this order from a side of the first housing cover 61 toward the compression chamber 12 in the direction in which the driving axis O1 extends.

[0102] In the compressor having the configuration described above, as illustrated by broken arrows of FIGS. 1 and 2, the refrigerant at low temperature and low pressure passing through the evaporator is sucked into the scroll chamber 65 through the suction communication port 68. Then, when the electric motor 10 is operated to rotate the rotor 11, the rotation of the rotor 11 is transmitted to the driving scroll 30, so that the driving scroll 30 is driven rotationally about the driving axis O1 in the scroll chamber 65. That is, the driving scroll 30 is rotated integrally with the rotor 11. Here, in the driven mechanism 20, each of the orbiting pins 21 allows the corresponding ring 22 to rotate about and relative to the orbiting pin 21 while sliding on an inner peripheral surface of the ring 22. Thus, the driven mechanism 20 transmits torque of the driving scroll 30 to the driven scroll 40.

[0103] As a result, the driven scroll 40 is driven rotationally about the driven axis O2 by the driving scroll 30 and the driven mechanism 20 to follow the driving scroll 30. Here, the driven mechanism 20 prevents the driven scroll 40 from rotating on its own axis. Accordingly, the driven scroll 40 orbits relative to the driving scroll 30 around the driven axis O2. The driving scroll spiral body 33 and the driven scroll spiral body 43 are each rotated in the suction portion 30a, so that the volume of the compression chamber 12 is changed by the driving scroll spiral body 33 and the driven scroll spiral body 43.

[0104] The refrigerant sucked into the scroll chamber 65 flows into the accommodation portion 38 through a space between the rotor 11 and the stator 17, as illustrated by broken arrows in FIGS. 1 and 2. The refrigerant sucked into the scroll chamber 65 flows into the accommodation portion 38 also through the slits formed in the stator core 17a. The refrigerant sucked into the scroll chamber 65 flows into the accommodation portion 38 also through a space between the winding 17b and slots that are formed in the stator core 17a and in which the winding 17b is accommodated. Here, illustrations of the slots are omitted. Thus, the refrigerant in the accommodation portion 38 is sucked into the compression chamber 12 through the suction port 374 and the suction portion 30a.

[0105] The compression chamber 12 confines the refrigerant therein and reduces its volume to compress the refrigerant by the rotational driving of the driving scroll 30 and the rotational following of the driven scroll 40. Thus, the high-pressure refrigerant compressed to reach discharge pressure flows from the discharge port 32 to the discharge chamber 14, and then, is discharged to the outside of the compressor through the discharge passage 390 and the discharge communication port 69. Here, in this compressor, since the shaft sealing member 63 provides the seal between the scroll chamber 65 and the set of the discharge passage 390 and the discharge communication port 69, the refrigerant that flows from the discharge passage 390 toward the discharge communication port 69 is prevented from flowing into the scroll chamber 65.

[0106] In this compressor, by the first diameter portion 64a of the projection body 64, the driving scroll 30 is supported rotatably about the driving axis O1, and the driven scroll 40 is supported rotatably about the driven axis O2. Accordingly, heat generated by friction between the rotating driving scroll 30 and the rotating driven scroll 40 during the operation of the compressor is inevitably transferred to the projection body 64. Furthermore, in this compressor, since the stator core 17a is fixed to the second diameter portion 64b of the projection body 64, heat generated in the electric motor 10 during the operation of the compressor is inevitably transferred to the projection body64.

[0107] In this compressor, vibrations generated in the driving scroll 30 and the driven scroll 40 during the operation of the compressor are also transmitted to the projection body 64. Furthermore, in this compressor, torque fluctuations of the electric motor 10 occur with the compression of the refrigerant in the compression chamber 12 during the operation of the compressor, so that vibrations caused by the torque fluctuations of the electric motor 10 are inevitably transmitted from the stator core 17a to the projection body 64.

[0108] Here, in this compressor, the projection body 64 is formed separately from the first housing cover 61, and the projection body 64 is attached to the first housing cover 61 with the gap between the first housing cover 61 and the projection body 64. As a result, in this compressor, heat of the projection body 64 is hardly transferred to the first housing cover 61, so that a temperature of the first housing cover 61, and by extension, a temperature of the housing 6 is hardly increased during the operation of the compressor. As a result, in this compressor, deterioration in durability of the housing 6 due to heat is suitably suppressed. In particular, in this compressor, since the projection body 64 is made of steel, the projection body 64 has high heat resistance. Accordingly, in this compressor, deterioration in durability of the projection body 64 due to heat is also suitably suppressed.

[0109] In addition, the projection body 64 is attached to the first housing cover 61 with the gap between the projection body 64 and the first housing cover 61, so that in this compressor, the vibrations transmitted from the electric motor 10, the driving scroll 30, and the driven scroll 40 to the projection body 64 during the operation of the compressor are also hardly transmitted from the projection body 64 to the first housing cover 61. Accordingly, in this compressor, vibrations of the housing 6 during the operation of the compressor are suitably suppressed.

[0110] In particular, in this compressor, the one-side elastic body 70 is provided between the second diameter portion 64b of the projection body 64 and the distal end portion 616 of the holding portion 61b. As a result, in this compressor, the one-side elastic body 70, that is, the first to third elastic bodies 70a to 70c elastically deform between the second diameter portion 64b and the distal end portion 616, so that it is suitably suppressed that the vibrations are transmitted from the projection body 64 to the first housing cover 61. Also in this respect, in this compressor, vibrations of the housing 6 during the operation of the compressor are suitably suppressed.

[0111] In this compressor, the first shaft member 81a of the first restricting body 81 is inserted through the attachment hole 641 of the second diameter portion 64b and into the fixing hole 617 of the distal end portion 616, so that the projection body 64 and the holding portion 61b are coupled to each other in the direction in which the driving axis O1 extends. This restricts that the projection body 64 rotates relative to the first housing cover 61 in this compressor.

[0112] Here, as illustrated in FIG. 3, in the first restricting body 81, the first supporting member 81b is provided on the first shaft member 81a, and the first supporting member 81b is located in the attachment hole 641 by inserting the first shaft member 81a through the attachment hole 641. The first supporting member 81b supports the first shaft member 81a while elastically deforming in the attachment hole 641. Thus, in this compressor, it is suitably suppressed that the vibrations are transmitted from the projection body 64 to the first housing cover 61 through the first restricting body 81.

[0113] Therefore, the compressor of the first embodiment has excellent durability and quietness.

[0114] In this compressor, due to compression load caused by the compression of the refrigerant in the compression chamber 12, load that inclines the driving scroll 30 and the driven scroll 40 relative to the front-rear direction of the compressor, that is, the axial direction of the housing 6 is inevitably applied to the driving scroll 30 and the driven scroll 40 during the operation of the compressor. Since the driving scroll 30 and the driven scroll 40 are rotatably supported by the projection body 64, the load that inclines the projection body 64 relative to the axial direction of the housing 6 is inevitably applied to the projection body 64 via the driving scroll 30 and the driven scroll 40.

[0115] In this respect, in this compressor, when load equal to or greater than a predetermined value is applied to the projection body 64, which inclines the projection body 64 at an angle equal to or greater than a predetermined angle in the scroll chamber 65 as illustrated in FIG. 4, in addition to the first supporting member 81b, one of the contact portions 813 of the first restricting body 81 is in contact with the inner peripheral surface of the attachment hole 641. Here, the projection body 64 is made of steel, and the first shaft member 81a, including the contact portions 813, is also made of steel. Accordingly, in this compressor, when the load equal to or greater than the predetermined value is applied to the projection body 64, which inclines the projection body 64 at the angle equal to or greater than the predetermined angle, the one of the contact portions 813 is in metal-to-metal contact with the inner peripheral surface of the attachment hole 641.

[0116] Thus, in this compressor, in a state where the load that is applied to the projection body 64 is less than the value set in advance, as illustrated in FIG. 3, the contact portions 813 are spaced apart from the inner peripheral surface of the attachment hole 641 in the radial direction of the housing 6, and the first shaft member 81a is not in contact with the projection body 64. This suitably suppresses that the vibrations are transmitted from the projection body 64 to the first housing cover 61 through the first restricting body 81. On the other hand, when the load equal to or greater than the set value is applied to the projection body 64, the one of the contact portions 813 may be in metal-to-metal contact with the inner peripheral surface of the attachment hole 641, so that the projection body 64 may be firmly supported by the first restricting body 81. As a result, in this compressor, the durability of the projection body 64 may also be improved.

[0117] The projection body 64 is prevented from being largely inclined in the scroll chamber 65 by the load in this manner, so that in this compressor, the projection body 64 may suitably and rotatably support the driving scroll 30 and the driven scroll 40. Although FIG. 4 illustrates a case where the load inclines the projection body 64 in a lower-left direction of the sheet of FIG. 4 within the scroll chamber 65, the load may also incline the projection body 64 in an upper-left direction of the sheet of FIG. 4 within the scroll chamber 65. Also in this case, in this compressor, the one of the contact portions 813 and the inner peripheral surface of the attachment hole 641 may be in metal-to-metal contact with each other.

[0118] In this compressor, the first restricting body 81 is disposed in front of the one-side elastic body 70 with the first shaft member 81a inserted through the attachment hole 641 and into the fixing hole 617. That is, the first restricting body 81 is located at a position closer to the compression chamber 12 than the one-side elastic body 70 in the direction in which the driving axis O1 extends. As a result, in this compressor, when the load equal to or greater than the set value is applied to the projection body 64 as described above, the first restricting body 81 may support the projection body 64 at the position closer to the compression chamber 12. Since the first restricting body 81 is located at the position closer to the compression chamber 12 than the one-side elastic body 70 in the direction in which the driving axis O1 extends, it is suppressed in this compressor that the first shaft member 81a has an excessively long axial length.Second Embodiment

[0119] As illustrated in FIG. 5, in the compressor of the second embodiment, an attachment hole 610c is formed in the cover main body 61a of the first housing cover 61, and a fixing hole 17c is formed in the stator core 17a. Unlike the compressor of the first embodiment, in this compressor, the attachment hole 641 is not formed in the second diameter portion 64b, and the fixing hole 617 is not formed in the distal end portion 616.

[0120] The attachment hole 610c is formed in the cover main body 61a outside the holding portion 61b in the radial direction of the housing 6. The attachment hole 610c extends through the cover main body 61a in the direction in which the driving axis O1 extends. As a result, the scroll chamber 65 communicates with the outside of the compressor through the attachment hole 610c. With the attachment hole 610c formed in this manner, the first housing cover 61 of this compressor corresponds to the “specific member” in the present disclosure. Note that although not illustrated in detail, similarly to the attachment hole 641, the attachment hole 610c is formed in a columnar shape, and the length of the inner diameter of the attachment hole 610c is greater than each of the first length L1 and the second length L2 and is slightly less than the third length L3.

[0121] The fixing hole 17c extends in the stator core 17a in the direction in which the driving axis O1 extends. The fixing hole 17c is open at the rear end surface of the stator core 17a radially inside the second coil end 172. When the stator core 17a is fitted to the outer peripheral surface of the second diameter portion 64b of the projection body 64 and the projection body 64 is attached to the first housing cover 61, the fixing hole 17c is disposed in front of the attachment hole 610c. The attachment hole 610c and the fixing hole 17c are coaxially aligned with each other in the direction in which the driving axis O1 extends.

[0122] In this compressor, the second restricting body 82 is provided instead of

[0123] the first restricting body 81. The second restricting body 82 is also an example of the “restricting body” in the present disclosure.

[0124] The second restricting body 82 has a second shaft member 82a and a second supporting member 82b. The second shaft member 82a corresponds to the “shaft member” in the present disclosure, and the second supporting member 82b corresponds to the “supporting member” in the present disclosure.

[0125] The second shaft member 82a is made of steel. The second shaft member 82a has a main body 821 and a pair of contact portions 823. The main body 821 has the same configuration as that of the main body 811 in the compressor of the first embodiment, except that the axial length of the main body 821 is greater than that of the main body 811. That is, the outer diameter of the main body 821 is the first length L1.

[0126] The contact portions 823 are formed integrally with the main body 821. Other configurations of each of the contact portions 823 are the same as those of each of the contact portions 813 in the compressor of the first embodiment. That is, the outer diameter of each of the contact portions 823 is the second length L2. The configuration of the second supporting member 82b is the same as that of the first supporting member 81b in the compressor of the first embodiment. That is, the outer diameter of the second supporting member 82b is the third length L3.

[0127] In the second restricting body 82, the second shaft member 82a is inserted into the attachment hole 610c from the rear thereof, that is, from the outside of the compressor. Here, the second supporting member 82b of the second restricting body 82 is inserted into the attachment hole 610c while elastically deforming in the radial direction of the housing 6. The front portion of the main body 821 of the second restricting body 82 is inserted into and fixed to the fixing hole 17c.

[0128] Thus, in this compressor, the first housing cover 61 and the stator 17 are coupled to each other in the direction in which the driving axis O1 extends by the second restricting body 82. Here, since the stator core 17a is fitted to the second diameter portion 64b of the projection body 64, the projection body 64 is connected to the first housing cover 61 via the stator 17 and the second restricting body 82. Accordingly, also in this compressor, the projection body 64 is restricted from rotating relative to the holding portion 61b, and by extension, the first housing cover 61.

[0129] In the second restricting body 82, the second supporting member 82b elastically deforms in the attachment hole 610c, so that the second supporting member 82b elastically supports the second shaft member 82a in the attachment hole 610c and provides seal between the scroll chamber 65 and the outside of the compressor. Other components of this compressor are the same as those of the compressor of the first embodiment, and identical components have the same reference numerals and may not be reiterated.

[0130] Also in this compressor, similarly to the compressor of the first embodiment, heat of the projection body 64 is hardly transferred to the housing 6, and vibrations are hardly transmitted from the projection body 64 to the first housing cover 61.

[0131] Although not illustrated in detail, in this compressor, the stator core 17a is attached to the second diameter portion of the projection body 64, so that when the projection body 64 is inclined in the scroll chamber 65 at an angle equal to or larger than a predetermined angle by load applied to the projection body 64, the stator 17 is also inclined integrally with the projection body 64. Accordingly, similarly to the compressor of the first embodiment, also in this compressor, when the load equal to or greater than a predetermined value is applied to the projection body 64, which inclines the projection body 64 and the stator 17 at the angle equal to or greater than the predetermined angle, one of the contact portions 823 of the second restricting body 82 is in contact with the inner peripheral surface of the attachment hole 610c. Here, since the first housing cover 61 is made of an aluminum alloy, also in this compressor, the one of the contact portions 823 may be in metal-to-metal contact with the inner peripheral surface of the attachment hole 610c. As a result, this compressor is also capable of providing the same effects of the first embodiment.Third Embodiment

[0132] As illustrated in FIG. 6, in the compressor of the third embodiment, a communication hole 643 is formed in the second diameter portion 64b. The communication hole 643 has the same configuration as that of the attachment hole 641 in the compressor of the first embodiment, and is formed in the second diameter portion 64b so as to be coaxial with the fixing hole 617. The communication hole 643 is formed in a columnar shape, and the inner diameter of the communication hole 643 is greater than each of the first length L1 and the second length L2 and is slightly less than the third length L3. The communication hole 643 extends through the second diameter portion 64b in the direction in which the driving axis O1 extends.

[0133] In this compressor, the stator 17 has an extension member 17d. The extension member 17d is made of a metal plate material, and has a substantially rectangular shape extending in the radial direction of the housing 6. The extension member 17d is fixed to the stator core 17a with a fixing pin 17e. More specifically, the extension member 17d is fixed to the front end surface of the stator core 17a inside the first coil end 171, and extends from the stator core 17a toward the projection body 64 in the radial direction of the housing 6.

[0134] An attachment hole 17f is formed in the extension member 17d. The attachment hole 17f is formed in the extension member 17d so as to be coaxial with the communication hole 643 and the fixing hole 617. With the attachment hole 17f formed in this manner, the extension member 17d of this compressor, that is, the stator 17, corresponds to the “specific member” in the present disclosure.

[0135] The attachment hole 17f is formed in a columnar shape, and the inner diameter of the attachment hole 17f is greater than each of the first length L1 and the second length L2 and is slightly less than the third length L3. The attachment hole 17f extends through the extension member 17d in the direction in which the driving axis O1 extends. As a result, the attachment hole 17f has the same diameter as that of the communication hole 643. Note that the communication hole 643 may be larger or smaller than the attachment hole 17f.

[0136] In this compressor, a third restricting body 83 is provided instead of the first restricting body 81. The third restricting body 83 is an example of the “restricting body” in the present disclosure.

[0137] The third restricting body 83 has a third shaft member 83a and a third supporting member 83b. The third shaft member 83a corresponds to the “shaft member” in the present disclosure, and the third supporting member 83b corresponds to the “supporting member” in the present disclosure.

[0138] The third shaft member 83a is made of steel. The third shaft member 83a has a main body 831 and a pair of contact portions 833. The main body 831 has the same configuration as that of the main body 811 in the compressor of the first embodiment, except that the axial length of the main body 831 is greater than that of the main body 811. That is, the outer diameter of the main body 831 is the first length L1.

[0139] Each of the contact portions 833 is formed integrally with the main body 831. Other configurations of each of the contact portions 833 are the same as those of each of the contact portions 813 in the compressor of the first embodiment. That is, the outer diameter of each of the contact portions 833 is the second length L2. The configuration of the third supporting member 83b is the same as that of the first supporting member 81b in the compressor of the first embodiment. That is, the outer diameter of the third supporting member 83b is the third length L3.

[0140] The third shaft member 83a of the third restricting body 83 is inserted into the attachment hole 17f from the front thereof. Here, in the third restricting body 83, the third supporting member 83b is inserted into the attachment hole 17f while elastically deforming in the radial direction of the housing 6. In the third restricting body 83, the main body 831 is inserted through the communication hole 643 and into the fixing hole 617 in this order, and is fixed to the fixing hole 617.

[0141] Thus, in this compressor, the first housing cover 61, the projection body 64, and the stator 17 are coupled to each other in the direction in which the driving axis O1 extends by the third restricting body 83. Accordingly, also in this compressor, the projection body 64 is restricted from rotating relative to the holding portion 61b, and by extension, the first housing cover 61.

[0142] In the third restricting body 83, the third supporting member 83b elastically deforms in the attachment hole 17f, so that the third supporting member 83b elastically supports the third shaft member 83a in the attachment hole 17f. Other components of this compressor are the same as those of the compressor of the first embodiment, and identical components have the same reference numerals and may not be reiterated.

[0143] Also in this compressor, similarly to the compressor of the first embodiment, heat of the projection body 64 is hardly transferred to the housing 6, and vibrations are hardly transmitted from the projection body 64 to the first housing cover 61.

[0144] Although not illustrated in detail, also in this compressor, when the projection body 64 is inclined at an angle equal to or larger than a predetermined angle in the scroll chamber 65 by load applied to the projection body 64, the stator 17 is also inclined integrally with the projection body 64. Accordingly, also in this compressor, when the load equal to or greater than a predetermined value is applied to the projection body 64, which inclines the projection body 64 and the stator 17 at the angle equal to or larger than the predetermined angle, one of the contact portions 833 of the third restricting body 83 is in contact with the inner peripheral surface of the attachment hole 17f. Here, since the extension member 17d is made of metal, also in this compressor, the one of the contact portions 833 and the inner peripheral surface of the attachment hole 17f may be in metal-to-metal contact with each other. As a result, this compressor is also capable of providing the same effects of the first embodiment.

[0145] Although the present disclosure has been described above based on the first to third embodiments, the present disclosure is not limited to the first to third embodiments, and may be modified within the scope of the present disclosure.

[0146] For example, in the compressor of the first embodiment, the stator core 17a is fixed to the projection body 64. However, the present disclosure is not limited thereto, and the rotor 11 may be disposed between the stator 17 and the projection body 64 by fixing the stator core 17a to the inner peripheral surface of the housing main body 60. The same applies to the compressor of the third embodiment.

[0147] In the compressor of the first embodiment, the first shaft member 81a has the two contact portions 813. However, the present disclosure is not limited thereto, and the first shaft member 81a may have only one of the two contact portions 813. The same applies to the compressors of the second and third embodiments.

[0148] In the compressor of the first embodiment, the first shaft member 81a of the first restricting body 81 is inserted through the attachment hole 641 and into the fixing hole 617 from the rear thereof by forming the attachment hole 641 in the distal end portion 616 of the holding portion 61b and forming the fixing hole 617 in the second diameter portion 64b of the projection body 64.

[0149] In the compressor of the second embodiment, the second shaft member 82a of the second restricting body 82 may be inserted through the attachment hole 610c and into the fixing hole 17c from the front thereof by forming the attachment hole 610c in the stator core 17a and forming the fixing hole 17c in the cover main body 61a.

[0150] In the compressor of the third embodiment, the third shaft member 83a of the third restricting body 83 may be inserted through the attachment hole 17f and the communication hole 643 and into the fixing hole 617 from the rear thereof by forming the attachment hole 17f in the distal end portion 616 and forming the fixing hole 617 in the extension member 17d.

[0151] In the compressor of the third embodiment, the stator 17 may be attached to the projection body 64 by fitting the stator core 17a to the second diameter portion 64b with a clearance therebetween.

[0152] In the compressor of the first embodiment, the one-side elastic body 70 includes the first to third elastic bodies 70a to 70c. However, the present disclosure is not limited thereto, and the one-side elastic body 70 may be configured as a single cylindrical member extending in the direction in which the driving axis O1 extends. The same applies to the compressors of the second and third embodiments.

[0153] In the compressor of the first embodiment, the one-side elastic body 70 may be disposed between the second diameter portion 64b and the base end portion 615 in the direction in which the driving axis O1 extends. The same applies to the compressors of the second and third embodiments.

[0154] In the compressor of the first embodiment, the one-side elastic body 70 may be omitted. The same applies to the compressors of the second and third embodiments.

[0155] In the compressor of the first embodiment, the first radial ball bearing 51 may be fitted to the first diameter portion 64a of the projection body 64, and the first radial ball bearing 51 may be fitted into the inner tubular portion 37b of the cover body 37 with a clearance between. In addition, the plain bearing 13 may be fitted into the accommodation recess 15, and the bushing 53 may be fitted to the plain bearing 13 with a clearance therebetween. The same applies to the compressors of the second and third embodiments.

[0156] In the compressor of the first embodiment, the projection body 64 may be made of a material other than steel, such as an aluminum alloy. The same applies to the compressors of the second and third embodiments.

[0157] In the compressor of the first embodiment, the holding portion 61b is formed integrally with the cover main body 61a. However, the present disclosure is not limited thereto, and the holding portion 61b may be formed separately from the cover main body 61a, and the holding portion 61b may be fixed to the cover main body 61a. In this case, the holding portion 61b and the cover main body 61a are easily made of different materials. The same applies to the compressors of the second and third embodiments.

[0158] In the compressor of the first embodiment, the first diameter portion 64a and the second diameter portion 64b of the projection body 64 are formed integrally with each other. However, the present disclosure is not limited thereto, the first diameter portion 64a may be formed separately from the second diameter portion 64b, and the first diameter portion 64a may be fixed to the second diameter portion 64b. The projection body 64 may only have the first diameter portion 64a or the second diameter portion 64b. The same applies to the compressors of the second and third embodiments.

[0159] In the compressor of the first embodiment, the housing 6 includes the housing main body 60, the first housing cover 61, and the second housing cover 62. However, the housing 6 is not limited thereto, and may have other configurations. The same applies to the compressors of the second and third embodiments.

[0160] This specification includes the following disclosure.Supplementary Note 1

[0161] A co-rotating scroll compressor including:

[0162] a housing; a driving scroll; a driven scroll; a driving mechanism; and a driven mechanism,

[0163] the housing having a scroll chamber in which the driving scroll, the driven scroll, and the driving mechanism are accommodated,

[0164] the driving mechanism having a stator and a rotor that is rotationally driven by the stator,

[0165] the driving scroll being driven rotationally about a driving axis by the driving mechanism,

[0166] the driven scroll being eccentric to the driving scroll and being driven rotationally about a driven axis by the driving scroll and the driven mechanism to follow the driving scroll, and

[0167] the driving scroll and the driven scroll forming a compression chamber in which fluid is compressed by the rotational driving of the driving scroll and the rotational following of the driven scroll, characterized in that a projection body and a restricting body are provided in the scroll chamber,

[0168] the projection body extends toward the driving scroll and the driven scroll in a direction in which the driving axis extends, is formed separately from the housing, and is attached to the housing with a gap between the projection body and the housing,

[0169] the restricting body restricts the projection body from rotating relative to the housing,

[0170] the driving scroll is supported rotatably about the driving axis by the projection body,

[0171] the driven scroll is supported rotatably about the driven axis by the projection body,

[0172] the restricting body has:

[0173] a shaft member that is inserted into the projection body and the housing; and

[0174] a supporting member that is provided on an outer peripheral surface of the shaft member, and

[0175] the supporting member supports the shaft member while elastically deforming between the shaft member and a specific member that is one of the projection body and the housing.Supplementary Note 2

[0176] A co-rotating scroll compressor including:

[0177] a housing; a driving scroll; a driven scroll; a driving mechanism; and a driven mechanism,

[0178] the housing having a scroll chamber in which the driving scroll, the driven scroll, and the driving mechanism are accommodated,

[0179] the driving mechanism having a stator and a rotor that encloses the stator and that is rotationally driven by the stator,

[0180] the driving scroll being driven rotationally about a driving axis by the driving mechanism,

[0181] the driven scroll being eccentric to the driving scroll and being driven rotationally about a driven axis by the driving scroll and the driven mechanism to follow the driving scroll, and

[0182] the driving scroll and the driven scroll forming a compression chamber in which fluid is compressed by the rotational driving of the driving scroll and the rotational following of the driven scroll, characterized in that a projection body and a restricting body are provided in the scroll chamber,

[0183] the projection body extends toward the driving scroll and the driven scroll in a direction in which the driving axis extends, is formed separately from the housing, and is attached to the housing with a gap between the projection body and the housing,

[0184] the restricting body restricts the projection body from rotating relative to the housing,

[0185] the stator is attached to the projection body,

[0186] the driving scroll is supported rotatably about the driving axis by the projection body,

[0187] the driven scroll is supported rotatably about the driven axis by the projection body,

[0188] the restricting body has:

[0189] a shaft member that is inserted into the housing and the stator; and

[0190] a supporting member that is provided on an outer peripheral surface of the shaft member, and

[0191] the supporting member supports the shaft member while elastically deforming between the shaft member and a specific member that is one of the housing and the stator.Supplementary Note 3

[0192] A co-rotating scroll compressor including:

[0193] a housing; a driving scroll; a driven scroll; a driving mechanism; and a driven mechanism,

[0194] the housing having a scroll chamber in which the driving scroll, the driven scroll, and the driving mechanism are accommodated,

[0195] the driving mechanism having a stator and a rotor that is rotationally driven by the stator,

[0196] the driving scroll being driven rotationally about a driving axis by the driving mechanism,

[0197] the driven scroll being eccentric to the driving scroll and being driven rotationally about a driven axis by the driving scroll and the driven mechanism to follow the driving scroll, and

[0198] the driving scroll and the driven scroll forming a compression chamber in which fluid is compressed by the rotational driving of the driving scroll and the rotational following of the driven scroll, characterized in that

[0199] a projection body and a restricting body are provided in the scroll chamber,

[0200] the projection body extends toward the driving scroll and the driven scroll in a direction in which the driving axis extends, is formed separately from the housing, and is attached to the housing with a gap between the projection body and the housing,

[0201] the restricting body restricts the projection body from rotating relative to the housing,

[0202] the driving scroll is supported rotatably about the driving axis by the projection body,

[0203] the driven scroll is supported rotatably about the driven axis by the projection body,

[0204] the restricting body has:

[0205] a shaft member that is inserted into the housing, the projection body, and the stator; and

[0206] a supporting member that is provided on an outer peripheral surface of the shaft member, and

[0207] the supporting member supports the shaft member while elastically deforming between the shaft member and a specific member that is one of the housing, the projection body, and the stator.Supplementary Note 4

[0208] The co-rotating scroll compressor according to any one of supplementary notes 1 to 3, characterized in that

[0209] the housing, the projection body, and the stator are each made of metal,

[0210] the specific member has an attachment hole through which the restricting body is inserted,

[0211] the shaft member has a main body that is inserted through the supporting member and a contact portion that is made of metal and that is located inside the attachment hole by inserting the restricting body through the attachment hole,

[0212] the supporting member is located in the attachment hole and is in contact with an inner peripheral surface of the attachment hole while elastically deforming by inserting the restricting body through the attachment hole,

[0213] when load applied to the projection body is less than a value set in advance, the contact portion is spaced apart from the inner peripheral surface, and

[0214] when load applied to the projection body is equal to or greater than the value set in advance, the contact portion is in contact with the inner peripheral surface.Supplementary Note 5

[0215] The co-rotating scroll compressor according to supplementary note 4, characterized in that

[0216] an outer diameter of the main body is a first length less than an inner diameter of the attachment hole,

[0217] an outer diameter of the contact portion is a second length greater than the first length and smaller than the inner diameter of the attachment hole, and

[0218] an outer diameter of the supporting member is a third length greater than the second length.Supplementary Note 6

[0219] The co-rotating scroll compressor according to any one of supplementary notes 1 to 5, characterized in that

[0220] an elastic body that supports the projection body while elastically deforming is provided between the projection body and the housing, and

[0221] the restricting body is located at a position closer to the compression chamber than at least a part of the elastic body in the direction in which the driving axis extends.Supplementary Note 7

[0222] The co-rotating scroll compressor according to any one of supplementary notes 1 to 6, characterized in that

[0223] the projection body is made of steel.Industrial Applicability

[0224] The present disclosure is applicable to an air conditioner of a vehicle, or the like.

Examples

first embodiment

[0023]As illustrated in FIG. 1, the compressor of the first embodiment includes a housing 6, an electric motor 10, a driving scroll 30, a driven scroll 40, and a driven mechanism 20. The electric motor 10 is an example of the “driving mechanism” in the present disclosure.

[0024]In the present embodiment, a front-rear direction and an up-down direction of the compressor are defined by solid arrows illustrated in FIG. 1. The front-rear direction and the up-down direction are perpendicular to each other. In FIG. 2 and subsequent drawings, the front-rear direction and the up-down direction of the compressor are defined so as to correspond to FIG. 1. Note that these directions are merely examples for the sake of description, and a posture of the compressor may be changed as appropriate depending on a vehicle on which the compressor is mounted.

[0025]As illustrated in FIG. 1, the housing 6 includes a housing main body 60, a first housing cover 61, and a second housing cover 62. The housing ...

second embodiment

[0119]As illustrated in FIG. 5, in the compressor of the second embodiment, an attachment hole 610c is formed in the cover main body 61a of the first housing cover 61, and a fixing hole 17c is formed in the stator core 17a. Unlike the compressor of the first embodiment, in this compressor, the attachment hole 641 is not formed in the second diameter portion 64b, and the fixing hole 617 is not formed in the distal end portion 616.

[0120]The attachment hole 610c is formed in the cover main body 61a outside the holding portion 61b in the radial direction of the housing 6. The attachment hole 610c extends through the cover main body 61a in the direction in which the driving axis O1 extends. As a result, the scroll chamber 65 communicates with the outside of the compressor through the attachment hole 610c. With the attachment hole 610c formed in this manner, the first housing cover 61 of this compressor corresponds to the “specific member” in the present disclosure. Note that although not...

third embodiment

[0132]As illustrated in FIG. 6, in the compressor of the third embodiment, a communication hole 643 is formed in the second diameter portion 64b. The communication hole 643 has the same configuration as that of the attachment hole 641 in the compressor of the first embodiment, and is formed in the second diameter portion 64b so as to be coaxial with the fixing hole 617. The communication hole 643 is formed in a columnar shape, and the inner diameter of the communication hole 643 is greater than each of the first length L1 and the second length L2 and is slightly less than the third length L3. The communication hole 643 extends through the second diameter portion 64b in the direction in which the driving axis O1 extends.

[0133]In this compressor, the stator 17 has an extension member 17d. The extension member 17d is made of a metal plate material, and has a substantially rectangular shape extending in the radial direction of the housing 6. The extension member 17d is fixed to the stat...

Claims

1. A co-rotating scroll compressor comprising:a housing; a driving scroll; a driven scroll; a driving mechanism; and a driven mechanism,the housing having a scroll chamber in which the driving scroll, the driven scroll, and the driving mechanism are accommodated,the driving mechanism having a stator and a rotor that is rotationally driven by the stator,the driving scroll being driven rotationally about a driving axis by the driving mechanism,the driven scroll being eccentric to the driving scroll and being driven rotationally about a driven axis by the driving scroll and the driven mechanism to follow the driving scroll, andthe driving scroll and the driven scroll forming a compression chamber in which fluid is compressed by the rotational driving of the driving scroll and the rotational following of the driven scroll, whereina projection body and a restricting body are provided in the scroll chamber,the projection body extends toward the driving scroll and the driven scroll in a direction in which the driving axis extends, is formed separately from the housing, and is attached to the housing with a gap between the projection body and the housing,the restricting body restricts the projection body from rotating relative to the housing,the driving scroll is supported rotatably about the driving axis by the projection body,the driven scroll is supported rotatably about the driven axis by the projection body,the restricting body has:a shaft member that is inserted into the projection body and the housing; anda supporting member that is provided on an outer peripheral surface of the shaft member, andthe supporting member supports the shaft member while elastically deforming between the shaft member and a specific member that is one of the projection body and the housing.

2. A co-rotating scroll compressor comprising:a housing; a driving scroll; a driven scroll; a driving mechanism; and a driven mechanism,the housing having a scroll chamber in which the driving scroll, the driven scroll, and the driving mechanism are accommodated,the driving mechanism having a stator and a rotor that encloses the stator and that is rotationally driven by the stator,the driving scroll being driven rotationally about a driving axis by the driving mechanism,the driven scroll being eccentric to the driving scroll and being driven rotationally about a driven axis by the driving scroll and the driven mechanism to follow the driving scroll, andthe driving scroll and the driven scroll forming a compression chamber in which fluid is compressed by the rotational driving of the driving scroll and the rotational following of the driven scroll, whereina projection body and a restricting body are provided in the scroll chamber,the projection body extends toward the driving scroll and the driven scroll in a direction in which the driving axis extends, is formed separately from the housing, and is attached to the housing with a gap between the projection body and the housing,the restricting body restricts the projection body from rotating relative to the housing,the stator is attached to the projection body,the driving scroll is supported rotatably about the driving axis by the projection body,the driven scroll is supported rotatably about the driven axis by the projection body,the restricting body has:a shaft member that is inserted into the housing and the stator; anda supporting member that is provided on an outer peripheral surface of the shaft member, andthe supporting member supports the shaft member while elastically deforming between the shaft member and a specific member that is one of the housing and the stator.

3. A co-rotating scroll compressor comprising:a housing; a driving scroll; a driven scroll; a driving mechanism; and a driven mechanism,the housing having a scroll chamber in which the driving scroll, the driven scroll, and the driving mechanism are accommodated,the driving mechanism having a stator and a rotor that is rotationally driven by the stator,the driving scroll being driven rotationally about a driving axis by the driving mechanism,the driven scroll being eccentric to the driving scroll and being driven rotationally about a driven axis by the driving scroll and the driven mechanism to follow the driving scroll, andthe driving scroll and the driven scroll forming a compression chamber in which fluid is compressed by the rotational driving of the driving scroll and the rotational following of the driven scroll, whereina projection body and a restricting body are provided in the scroll chamber,the projection body extends toward the driving scroll and the driven scroll in a direction in which the driving axis extends, is formed separately from the housing, and is attached to the housing with a gap between the projection body and the housing,the restricting body restricts the projection body from rotating relative to the housing,the driving scroll is supported rotatably about the driving axis by the projection body,the driven scroll is supported rotatably about the driven axis by the projection body,the restricting body has:a shaft member that is inserted into the housing, the projection body, and the stator; anda supporting member that is provided on an outer peripheral surface of the shaft member, andthe supporting member supports the shaft member while elastically deforming between the shaft member and a specific member that is one of the housing, the projection body, and the stator.

4. The co-rotating scroll compressor according to claim 1, whereinthe housing, the projection body, and the stator are each made of metal,the specific member has an attachment hole through which the restricting body is inserted,the shaft member has a main body that is inserted through the supporting member and a contact portion that is made of metal and that is located inside the attachment hole by inserting the restricting body through the attachment hole,the supporting member is located in the attachment hole and is in contact with an inner peripheral surface of the attachment hole while elastically deforming by inserting the restricting body through the attachment hole,when load applied to the projection body is less than a value set in advance, the contact portion is spaced apart from the inner peripheral surface, andwhen load applied to the projection body is equal to or greater than the value set in advance, the contact portion is in contact with the inner peripheral surface.

5. The co-rotating scroll compressor according to claim 4, whereinan outer diameter of the main body is a first length less than an inner diameter of the attachment hole,an outer diameter of the contact portion is a second length greater than the first length and smaller than the inner diameter of the attachment hole, andan outer diameter of the supporting member is a third length greater than the second length.

6. The co-rotating scroll compressor according to claim 4, whereinan elastic body that supports the projection body while elastically deforming is provided between the projection body and the housing, andthe restricting body is located at a position closer to the compression chamber than at least a part of the elastic body in the direction in which the driving axis extends.

7. The co-rotating scroll compressor according to claim 1, whereinthe projection body is made of steel.

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