Co-rotating scroll compressor

Abstract

A co-rotating scroll compressor according to the present invention has a drive scroll (31) and a driven scroll (41). The drive scroll (31) has a drive end plate (31), a drive scroll body (33), a drive peripheral wall (35), and a cover body (37). The driven scroll (41) has a driven end plate (41) and a driven scroll body (43). The driven end plate (41) is arranged between the drive peripheral wall (35) and the cover body (37) in a state in which the driven end plate can be rotationally driven. The driven end plate (41) and the drive peripheral wall (35) can abut against each other.In this co-rotating scroll compressor, in the state where the driven end plate (41) and the driving peripheral wall (35) abut each other, a gap (S2) between the driven scroll body (43) and the driving end plate (31) and a gap (S3) between the driving scroll body (33) and the driven end plate (41) are selected such that, respectively, the driven scroll body (43) and the driving end plate (31) are not in contact with each other and the driving scroll body (33) and the driven end plate (41) are not in contact with each other.

Description

Technical area

[0001] The present invention relates to a co-rotating scroll compressor. State of the art

[0002] Patent Literature 1 discloses a known co-rotating scroll compressor. The co-rotating scroll compressor includes a housing, a drive mechanism, a drive scroll, a driven scroll, and a driven mechanism. The housing accommodates the drive mechanism, the drive scroll, the driven scroll, and the driven mechanism.

[0003] The drive mechanism includes a rotor. The rotor has a bottom wall portion having a substantially disc shape and a cylindrical portion extending from the bottom wall portion in a direction of a drive axis. The drive scroll includes a drive scroll end plate, a drive scroll body, and a drive scroll peripheral wall. The drive scroll body is integrally formed with the drive scroll end plate and has a spirally extending shape extending from the drive scroll end plate toward the driven scroll. The drive scroll peripheral wall extends in a cylindrical shape toward the driven scroll. The drive scroll peripheral wall is integrally formed with the drive scroll end plate and surrounds the drive scroll body. The drive scroll peripheral wall is fixed to the cylindrical portion of the rotor, so that the drive scroll is integrated with the rotor.Accordingly, the drive spiral is configured to be driven by the drive mechanism to rotate about the drive axis.

[0004] The driven scroll is arranged inside the rotor, specifically between the bottom wall portion of the rotor and the drive scroll in the direction of the drive axis. Thus, the driven scroll faces the drive scroll inside the rotor. The driven scroll has a driven scroll end plate and a driven scroll body. The driven scroll end plate faces the drive scroll body and the drive scroll peripheral wall. The driven scroll body is integrally formed with the driven scroll end plate and has a spirally extending shape extending from the driven scroll end plate toward the drive scroll end plate. The drive scroll body and the driven scroll body face each other to form a compression chamber for compressing a fluid.

[0005] The driven mechanism is arranged between the bottom wall portion of the rotor and the driven scroll end plate of the driven scroll. Accordingly, the driven scroll is driven by the drive scroll and the driven mechanism to rotate about a driven axis of the drive scroll, which is eccentric to the drive axis, so that the driven scroll is able to orbit relative to the drive scroll.

[0006] This scroll compressor changes the volume of the compression chamber by rotating the drive scroll and the driven scroll around the drive and driven axes, respectively. Accordingly, fluid is drawn from the outside of the drive scroll and the driven scroll into the compression chamber and compressed there. The compressed fluid is discharged from the compression chamber to the outside of the drive scroll and the driven scroll. Citation listPatent literature

[0007] Patent Literature 1: Japanese Patent Application Laid-Open No. H07-229480 Summary of the inventionTechnical problem

[0008] When such a known co-rotating scroll compressor is operated, the driven scroll is inevitably affected by a tilting moment generated by the reaction force of the fluid being compressed in the compression chamber, causing the driven scroll to tilt with respect to the directions of the drive axis and the driven axis. When the driven scroll is tilted by the tilting moment, and the driven scroll body and the drive scroll body therefore come into contact with the drive scroll end plate and the driven scroll end plate, respectively, the driven scroll tilted by the tilting moment is supported by the drive scroll body and the driven scroll body. This increases the load on the drive scroll body and the driven scroll body, so that the drive scroll body and the driven scroll body are easily damaged.This may therefore cause a reduction in the durability of the co-rotating scroll compressor.

[0009] The present invention, which has been made in light of the above-mentioned problem, is directed to providing a co-rotating scroll compressor having excellent durability. Solution to the problem

[0010] A co-rotating scroll compressor comprises: a housing; a drive mechanism; a drive scroll; a driven scroll; and a driven mechanism, wherein the drive spiral is configured to be driven by the drive mechanism to rotate about a drive axis, the driven spiral is eccentric to the drive spiral and is configured to be rotated about a driven axis by the drive spiral and the driven mechanism, the drive scroll has: a drive scroll end plate extending in a direction crossing the drive axis; a drive scroll peripheral wall having a cylindrically extending shape extending from the drive scroll end plate toward the driven scroll; and a drive scroll body disposed within the drive scroll peripheral wall and having a spirally extending shape extending from the drive scroll end plate toward the driven scroll, the driven scroll has: a driven scroll end plate extending in a direction crossing the driven axis; and a driven scroll body having a spirally extending shape extending from the driven scroll end plate toward the drive scroll, and the drive scroll body and the driven scroll body face each other to form a compression chamber and are rotated to change a volume of the compression chamber, wherein the drive spiral has a cover body which is fixed to the drive spiral peripheral wall, the driven scroll end plate is rotatably arranged between the drive scroll peripheral wall and the cover body and the driven scroll end plate is capable of being brought into contact with the drive scroll circumferential wall, and when the driven scroll end plate is in contact with the drive scroll circumferential wall, a gap is formed between the driven scroll body and the drive scroll end plate, and a gap is formed between the drive scroll body and the driven scroll end plate to prevent the driven scroll body and the drive scroll body from coming into contact with the drive scroll end plate and the driven scroll end plate, respectively.

[0011] In the co-rotating scroll compressor of the present invention, the driven scroll end plate is rotatably disposed between the drive scroll peripheral wall and the cover body. The driven scroll end plate is contactable with the drive scroll peripheral wall. In the co-rotating scroll compressor of the present invention, when the driven scroll end plate is in contact with the drive scroll peripheral wall, a gap is formed between the driven scroll body and the drive scroll end plate, and a gap is formed between the drive scroll body and the driven scroll end plate to prevent the driven scroll body and the drive scroll body from contacting the drive scroll end plate and the driven scroll end plate, respectively.

[0012] This configuration prevents the driven scroll body and the driving scroll body from coming into contact with the driving scroll end plate and the driven scroll end plate, respectively, even if the driven scroll is tilted by the tilting moment and the driven scroll end plate therefore comes into contact with the driving scroll circumferential wall when the co-rotating scroll compressor is operated.

[0013] Thus, the co-rotating scroll compressor allows the drive scroll circumferential wall and the driven scroll end plate to adequately support the tilting moment acting on the driven scroll. Furthermore, the co-rotating scroll compressor does not need to support the driven scroll, which is tilted by the tilting moment, with the drive scroll body and the driven scroll body, thereby eliminating the heavy load on the drive scroll body and the driven scroll body. Accordingly, the co-rotating scroll compressor prevents damage to the drive scroll body and the driven scroll body, i.e., the drive scroll and the driven scroll.

[0014] Therefore, the co-rotating scroll compressor of the present invention has excellent durability.

[0015] In the co-rotating scroll compressor, the driven scroll body is positioned between the drive scroll peripheral wall and the cover body, facilitating the positioning of the driven scroll relative to the drive scroll. This co-rotating scroll compressor therefore simplifies compressor manufacturing.

[0016] A plurality of through-holes may be formed in a peripheral portion of the driven scroll end plate. It is preferable that a spacer be disposed in each of the through-holes to position the driven scroll end plate between the drive scroll peripheral wall and the cover body, so that the driven scroll end plate is rotatable.

[0017] The presence of the spacer allows the driven scroll end plate to be rotatably disposed between the drive scroll peripheral wall and the cover body, thereby facilitating manufacturing.

[0018] The drive mechanism may include a rotor having a cylindrical shape, surrounding the drive scroll peripheral wall from an outer peripheral side of the drive scroll peripheral wall, and fixed to the drive scroll peripheral wall. It is preferable that the driven scroll end plate has a diameter larger than the diameter of the rotor.

[0019] Increasing the diameter of the driven scroll end plate can reduce the load generated when the driven scroll end plate comes into contact with the drive scroll circumferential wall, causing the overturning moment acting on the driven scroll end plate. This further increases the fatigue life of the co-rotating scroll compressor.

[0020] In the co-rotating scroll compressor, the driven scroll end plate, with the driven scroll end plate positioned between the drive scroll peripheral wall and the cover body, protrudes radially outward beyond the drive scroll peripheral wall. This configuration allows the driven scroll end plate to be positioned between the drive scroll peripheral wall and the cover body during manufacturing of the co-rotating scroll compressor, thereby facilitating the positioning of the driven scroll relative to the drive scroll. Advantageous effects of the invention

[0021] Therefore, the co-rotating scroll compressor of the present invention has excellent durability. Brief description of the drawings [ Fig. 1] Fig. 1 is a sectional view of a co-rotating scroll compressor of one embodiment. [ Fig. 2] Fig. Fig. 2 is a sectional view of the co-rotating scroll compressor according to the embodiment, taken along a line II-II in Fig. 1, which illustrates a housing, a cover body and the like. [ Fig. 3] Fig. 3 is an enlarged sectional view of main parts of the co-rotating scroll compressor according to the embodiment, illustrating a drive scroll peripheral wall, the cover body, a space, and the like. [ Fig. 4] Fig. 4 is a sectional view of the co-rotating scroll compressor according to the embodiment in the same direction as the direction in Fig. 2, which represents a driven spiral end plate and the like. [ Fig. 5] Fig. 5 is a sectional view of the co-rotating scroll compressor according to the embodiment in the same direction as the direction in Fig. 2, which represents the housing, cover body, driven scroll end plate, and the like. [ Fig. 6] Fig. 6 is an enlarged sectional view of the main parts of the co-rotating scroll compressor according to the embodiment, similar to Fig. 3, which illustrates the drive scroll peripheral wall fixed to the cover body with the driven scroll end plate disposed between the drive scroll peripheral wall and the cover body. [ Fig. 7] Fig. Fig. 7 is an enlarged sectional view of the co-rotating scroll compressor according to the embodiment, taken along a line VII-VII in Fig. 5, which shows the driving scroll, the driven scroll, and the like in a state where the driven scroll is tilted by a tilting moment. [ Fig. 8] Fig. Fig. 8 is an enlarged sectional view of main parts of a co-rotating scroll compressor according to a comparative example, similar to Fig. 6, which illustrates a drive scroll peripheral wall fixed to a cover body with a driven scroll end plate disposed between the drive scroll peripheral wall and the cover body. [ Fig. 9] Fig. 9 is an enlarged sectional view of the main parts of the co-rotating scroll compressor according to the comparative example, similar to Fig. 7, which illustrates a driving scroll, a driven scroll and the like in a state where the driven scroll is tilted by a tilting moment. Description of the embodiments

[0022] An embodiment of the present invention will be described in detail below with reference to the accompanying drawings. The co-rotating scroll compressor according to the embodiment (hereinafter referred to simply as the compressor) is mounted in a vehicle (not shown) and serves as a component of an air conditioning system of the vehicle.

[0023] The compressor according to the embodiment comprises a housing 6, an electric motor 10, a drive scroll 30, a driven scroll 40 and a driven shaft 16, which in Fig. 1, and a driven mechanism 20 which is Fig. 5. The electric motor 10 serves, for example, as the drive mechanism of the present invention.

[0024] In the embodiment, the front / rear direction of the compressor is indicated by the arrow in Fig. 1. In addition, one radial side and the other radial side along the radial direction of a driven scroll end plate 41, ie, the driven scroll 40, are indicated by the arrow in Fig. 2. The directions of the compressor, such as the front / rear direction and one and the other radial side of the driven scroll end plate 41 along the radial direction in Fig. 3 and later correspond to the directions and sides shown in Fig. 1 and Fig. 2. It should be noted that the directions are an example for explanatory purposes and the position of the compressor may be changed as needed depending on the vehicle in which the compressor is mounted.

[0025] As in Fig. As shown in Figure 1, the housing 6 includes a housing body 60, a bearing housing 61, and a housing cover 62. The housing body 60, the bearing housing 61, and the housing cover 62 are made of an aluminum alloy.

[0026] The housing body 60 is a tubular member with a bottom and has a first outer peripheral wall 60a and a rear wall 60b. The first outer peripheral wall 60a has a cylindrical shape centered around a drive axis O1. The drive axis O1 is parallel to the front-rear direction.

[0027] The first outer peripheral wall 60a has an inner peripheral surface 601. The first outer peripheral wall 60a has an inlet connection port 68. The inlet connection port 68 extends in the radial direction of the housing body 60. The inlet connection port 68 is connected to an evaporator (not shown) via a pipe (not shown).

[0028] The rear wall 60b is located at the rear end of the housing body 60. The rear wall 60b has a substantially circular plate shape and is perpendicular to the drive axis O1. The outer peripheral edge of the rear wall 60b is connected to the rear end of the first outer peripheral wall 60a. The inlet connection port 68 may be formed in the rear wall 60b.

[0029] The rear wall 60b has a first support portion 64 at a center of an inner surface of the rear wall 60b. The first support portion 64 has a substantially cylindrical shape centered around the drive axis O1 and extends forward from the center of the inner surface of the rear wall 60b into the suction chamber 65. A first sliding bearing 51 is provided on the first support portion 64.

[0030] The first support section 64 has a pin hole 4. As in Fig. 2, the pin hole 4 is formed in the first support portion 64 at a position that is eccentric to the drive axis O1. As shown in Fig. As shown in Figure 1, the pin hole 4 is open at a front end surface of the first support portion 64 and extends straight and rearward within the first support portion 64. The pin hole 4 is not formed through the first support portion 64 in the front-rear direction. The rear end of the pin hole 4 is located within the first support portion 64.

[0031] The bearing housing 61 is located in front of the housing body 60. The bearing housing 61 has a substantially flat circular plate shape and is perpendicular to the drive axis O1. A peripheral edge of the bearing housing 61 is in contact with the front end of the first outer peripheral wall 60a of the housing body 60.

[0032] The bearing housing 61 has a second support portion 66 at a center, which has a cylindrical shape centered around the drive axis O1. A second plain bearing 52 is arranged in the second support portion 66. Instead of the first plain bearing 51 and the second plain bearing 52, the first support portion 64 and the second support portion 66 may have ball bearings or the like.

[0033] The housing cover 62 is arranged in front of the bearing housing 61. The housing cover 62 is a tubular member with a bottom and has a second outer peripheral wall 62a and a front wall 62b. The second outer peripheral wall 62a has a cylindrical shape centered around the drive axis O1 and extends in the direction of the drive axis O1. The length of the second outer peripheral wall 62a is shorter in the direction of the drive axis O1 than the length of the first outer peripheral wall 60a of the housing body 60.

[0034] The front wall 62b is located at the front end of the housing cover 62. The front wall 62b has a substantially circular plate shape and is perpendicular to the drive axis O1. The outer peripheral edge of the front wall 62b is connected to the front end of the second outer peripheral wall 62a. The front wall 62b has an output connection port 69. The output connection port 69 extends in the direction of the drive axis O1. The output connection port 69 may be formed in the second outer peripheral wall 62a.

[0035] The rear end of the second outer peripheral wall 62a of the housing cover 62 is in contact with the front end of the bearing housing 61, which is located on the side of the housing body 60 opposite the first outer peripheral wall 60a. In the housing 6, the bearing housing 61 is in contact with the first outer peripheral wall 60a and the second outer peripheral wall 62a, and the housing cover 62, the bearing housing 61, and the housing body 60 are fixed to each other with screws (not shown) in the direction of the drive axis O1.

[0036] In this way, the housing body 60 of the housing 6 is closed by the bearing housing 61 on the front side to form a suction chamber 65 in the housing body 60. The housing cover 62 of the housing 6 is closed by the bearing housing 61 on the back side to form a discharge connection chamber 13 in the housing cover 62. That is, in the housing 6, the suction chamber 65 and the discharge connection chamber 13 are defined by the bearing housing 61. The suction chamber 65 is connected to the inlet connection port 68. This configuration allows a refrigerant gas to be introduced into the suction chamber 65 from the outside of the housing 6 through the inlet connection port 68. The refrigerant gas serves, for example, as the fluid of the present invention. The discharge connection chamber 13 is connected to the discharge connection port 69.

[0037] The electric motor is housed in the suction chamber 65. The suction chamber 65 serves as a motor chamber in which the electric motor 10 is housed.

[0038] The electric motor 10 includes a stator 17 and a rotor 11. The stator 17 has a cylindrical shape centered around the drive axis O1 and extends in the direction of the drive axis O1. The stator 17 has a winding 17a. The stator 17 is fitted into an inner peripheral surface 601 of the first outer peripheral wall 60a, so that the stator 17 is fixed to the housing body 60, ie, the housing 6.

[0039] The rotor 11 has a cylindrical shape centered on the drive axis O1 and extends in the direction of the drive axis O1. The rotor 11 has a diameter smaller than a diameter of the stator 17 and is arranged inside the stator 17. Although detailed illustration is omitted, the rotor 11 is formed of a plurality of permanent magnets corresponding to the stator 17 and stacked steel plates for fixing the permanent magnets. The rotor 11 surrounds the drive scroll peripheral wall 35 from the outer peripheral side of the drive scroll peripheral wall 35 and is fixed to the drive scroll peripheral wall 35.

[0040] The drive scroll 30 is made of a metal, such as an aluminum alloy. The drive scroll 30 is housed in the suction chamber 65. The drive scroll 30 has a drive scroll end plate 31, a drive scroll body 33, a drive scroll peripheral wall 35, and a cover body 37.

[0041] The drive scroll end plate 31 has an end plate portion 31a and a boss portion 31b. The end plate portion 31a has a substantially disc shape and is perpendicular to the drive axis O1 and a driven axis O2 (i.e., it extends in a direction that crosses the drive axis O1). The driven axis O2 is eccentric and parallel to the drive axis O1. That is, the driven axis O2 is parallel to the front-to-back direction.

[0042] The end plate portion 31a has, on the opposite sides, a first front surface 311 facing the bearing housing 61 in the suction chamber 65, and a first rear surface 312, respectively.

[0043] The boss portion 31b is integrated with the end plate portion 31a. The boss portion 31b is located at the center of the drive scroll end plate 31 and extends cylindrically from the first front surface 311 in the direction of the drive axis O1. The discharge chamber 38 is located in the boss portion 31b. The discharge chamber 38 extends from the front end of the boss portion 31b into the end plate portion 31a. The shape of the discharge chamber 38 can be designed as needed.

[0044] The discharge chamber 38 is connected to a discharge port 32 formed by the end plate portion 31a. The discharge port 32 is formed in the direction of the drive axis O1 by the end plate portion 31a.

[0045] In the discharge chamber 38, a discharge reed valve 57 and a holder 58 are fixed to the discharge chamber 38 with a fastening screw 59. The discharge reed valve 57 opens and closes the discharge port 32, and the holder 58 adjusts the opening degree of the discharge reed valve 57.

[0046] The drive scroll body 33 is integrated with the end plate portion 31a of the drive scroll end plate 31 and extends from the first rear surface 312 of the end plate portion 31a rearward toward the driven scroll 40 and within the drive scroll peripheral wall 35 parallel to the drive axis O1 and the driven axis O2. The drive scroll body 33 has a spirally extending shape centered around the center of the end plate portion 31a, i.e., the drive scroll end plate 31, and extends radially and outwardly from the center of the spiral shape. As shown in Fig. 3, Fig. 6 and Fig. 7, the drive scroll body 33 has a rear end surface 330.

[0047] As in Fig. 1, the drive scroll peripheral wall 35 has a cylindrical shape centered around the drive axis O1 and extends parallel to the drive axis O1 and the driven axis O2.

[0048] The drive scroll peripheral wall 35 has a first opposing surface 351. The first opposing surface 351 is located at the rear end of the drive scroll peripheral wall 35. The drive scroll peripheral wall 35 has three screw holes 35c. The screw holes 35c are opened at the first opposing surface 351 and extend forward in the drive scroll peripheral wall 35. Fig. 3 represents one of the three screw holes 35c. The number of screw holes 35c can be designed as required.

[0049] The front end of the drive scroll circumferential wall 35 is integrated with the outer peripheral edge of the end plate portion 31a on the side opposite to the first opposing surface 351. That is, the drive scroll circumferential wall 35 extends cylindrically rearward (toward the driven scroll 40) from the first rear surface 312 of the drive scroll end plate 31. The drive scroll circumferential wall 35 is located radially outside the drive scroll body 33 and surrounds the drive scroll body 33. The extension length of the drive scroll circumferential wall 35 extending rearward from the first rear surface 312 of the drive scroll end plate 31 is longer than the extension length of the drive scroll body 33 extending rearward from the first rear surface 312 of the drive scroll end plate 31.That is, the first opposing surface 351 is spaced rearwardly from the drive scroll end plate 31 beyond the rear end surface 330 of the drive scroll body 33 (see . Fig. 3). Although the illustration is omitted, the outer peripheral end of the drive scroll body 33 is connected to the inner peripheral surface of the drive scroll peripheral wall 35.

[0050] As in Fig. 1 and Fig. 2, the cover body 37 has a cover portion 37a and a boss portion 37b. The cover portion 37a has a substantially disc shape and is perpendicular to the drive axis O1 and the driven axis O2. As shown in Fig. 1, the cover portion 37a has substantially the same diameter as the diameter of the end plate portion 31a and the drive scroll peripheral wall 35.

[0051] As in Fig. 3, Fig. 6 and Fig. As shown in Fig. 7, the cover portion 37a has a second opposing surface 371 and a rear end surface 372. The second opposing surface 371 is located at the front end of the cover portion 37a and serves as the front end surface of the cover portion 37a. The rear end surface 372 is located on the side opposite to the second opposing surface 371.

[0052] As in Fig. As shown in Figure 2, the cover portion 37a has a first suction port 37c and three screw holes 37d. The first suction port 37c and the screw holes 37d are formed from the second opposing surface 371 to the rear end surface 372 through the cover portion 37a. The first suction port 37c has a diameter larger than a diameter of each of the screw holes 37d. The shape and number of the first suction port 37c and the screw holes 37d can be designed as needed.

[0053] The cover portion 37a has six anti-rotation pins 21. Each of the anti-rotation pins 21 is inserted into and fixed to a mounting hole (not shown) formed in the second opposing surface 371 and extends forward from the second opposing surface 371.

[0054] In Fig. As shown in Figure 1, the boss portion 37b is integrated with the cover portion 37a at the center of the cover portion 37a and extends rearward from the cover portion 37a in the direction of the drive axis O1. The boss portion 37b has an insertion hole 37e. The insertion hole 37e is formed in the direction of the drive axis O1 through the boss portion 37b and the cover portion 37a. The boss portion 37b has a cylindrical shape centered on the drive axis O1.

[0055] The drive spiral peripheral wall 35 is pressed into the rotor 11 so that the drive spiral 30 is integrated with the rotor 11. As in Fig. 3, in the drive scroll 30, the cover body 37 is located behind the drive scroll body 33 and the drive scroll peripheral wall 35. That is, the cover body 37 is arranged such that the drive scroll body 33 and the drive scroll peripheral wall 35 are located between the cover body 37 and the drive scroll end plate 31. The second opposite surface 371 of the cover body 37 faces the drive scroll body 33 and the drive scroll peripheral wall 35.

[0056] In the drive scroll 30, the cover body 37 is spaced apart from the drive scroll body 33 and the drive scroll peripheral wall 35 in the direction of the drive axis O1. Accordingly, a space 14 is formed between the drive scroll peripheral wall 35 and the cover body 37, specifically between a flange portion 35b of the drive scroll peripheral wall 35 and the cover portion 37a of the cover body 37. The space 14 has a length in the direction of the drive axis O1 that serves as a first length L1.

[0057] In the drive spiral 30, the first opposing surface 351 of the flange portion 35b and the second opposing surface 371 of the cover portion 37a face each other in the direction of the drive axis O1 across the space 14. In other words, the first opposing surface 351 faces the second opposing surface 371 and is separated from the second opposing surface 371 by a distance corresponding to the first length L1 of the space 14. Fig. 1 and 5 to 7, the cover body 37 is fixed to the drive scroll peripheral wall 35 by three screws 71. Further details on fixing the cover body 37 to the drive scroll peripheral wall 35 will be described later.

[0058] The driven spiral 40, which in Fig. 1 is made of an aluminum alloy. The driven scroll 40 has a driven scroll end plate 41 and a driven scroll body 43.

[0059] As in Fig. 1 and Fig. 4, the driven scroll end plate 41 has a substantially disc shape and is perpendicular to the drive axis O1 and the driven axis O2 (i.e., it extends in a direction that crosses the driven axis O2). As shown in Fig. As shown in Figure 6, the driven scroll end plate 41 has a thickness serving as a second length L2. The second length L2 is shorter in the direction of the drive axis O1 than the first length L1 of the space 14.

[0060] As in Fig. 1 and Fig. As shown in Figure 7, the driven scroll end plate 41 has a diameter that is larger than the diameters of the drive scroll peripheral wall 35, the cover body 37, and the rotor 11. The driven scroll end plate 41 has a second front surface 411 and a second rear surface 412 on opposite sides of the driven scroll end plate 41, respectively.

[0061] As in Fig. 4, the driven scroll end plate 41 has a plurality of through holes 41a (in the present embodiment, three through holes 41a) and six mounting recesses 41b. As shown in Fig. 1, Fig. 6 and Fig. 7, each of the through holes 41a has a cylindrical shape and is formed from the second front surface 411 to the second rear surface 412 through a peripheral portion of the driven scroll end plate 41, that is, it is located at a position radially outside the driven scroll body 43. As shown in Fig. 4, the through holes 41a are spaced at equal intervals in the circumferential direction of the driven scroll end plate 41.

[0062] Each of the mounting recesses 41b is located between the through holes 41a in the circumferential direction of the driven scroll end plate 41. The mounting recess 41b has a cylindrical shape and is formed forward in the second rear surface 412. That is, the mounting recess 41b is not formed through the driven scroll end plate 41. A ring 22 is fitted in the mounting recess 41b.

[0063] The driven scroll end plate 41 has a second suction port 41c and a receiving portion 41d. The second suction port 41c is located between the two mounting recesses 41b. Similar to the through hole 41a, the second suction port 41c is arranged in the peripheral portion of the driven scroll end plate 41 at a position radially outside the driven scroll body 43, and the second suction port 41c has a cylindrical shape and is formed from the second front surface 411 to the second rear surface 412 through the driven scroll end plate 41 (see Fig. 7). The second suction port 41c has a diameter that is larger than a diameter of the first suction port 37c, which is Fig. 2, and is substantially equal to a diameter of the through hole 41a (see Fig. 4). The shape of the second suction port 41c can be designed as required.

[0064] The receiving portion 41d is located in the center of the driven scroll end plate 41. The receiving portion 41d has a cylindrical shape centered around the driven axis O2 and is recessed forward from the second rear surface 412 of the driven scroll end plate 41.

[0065] A bushing 53 is received in the receiving portion 41d. A driven pin 55 is inserted into the bushing 53. The driven pin 55 is inserted into the bushing 53 at the center of the bushing 53, that is, at a position eccentric to the driven axis O2. The driven pin 55 is made of steel and has a cylindrical shape. The driven pin 55 protrudes rearward from the bushing 53, that is, the driven scroll end plate 41. The bushing and the driven pin 55 cooperate to form the driven shaft 16. The bushing 53 may be received in the receiving portion 41d via a bearing, such as a journal bearing.

[0066] The driven scroll end plate 41 has three metal spacers 18 for positioning the driven scroll end plate 41 between the drive scroll peripheral wall 35 and the cover body 37 so that the driven scroll end plate 41 is rotatable. Each of the spacers 18 has a diameter smaller than a diameter of the through hole 41a and is arranged in the through hole 41a. The spacers 18 have the same cylindrical shape, and the screws 71 are inserted into the spacers 18, respectively. The spacers 18 extend in the direction of the drive axis O1. As shown in Fig. As shown in Figure 6, the length of each of the spacers 18 in the direction of the drive axis O1 is the first length L1. The spacer 18 may be made of a resin.

[0067] The driven scroll end plate 41 has a thickness serving as a second length L2. The spacer 18 protrudes from the through hole 41a by the difference in length between the first length L1 and the second length L2 in the direction of the drive axis O1.

[0068] As in Fig. 1, the driven scroll body 43 is integrated with the driven scroll end plate 41 and extends forward from the second front surface 411 of the driven scroll end plate 41 toward the drive scroll end plate 31 of the drive scroll 30 and parallel to the drive axis O1 and the driven axis O2. The driven scroll body 43 has a spirally extending shape centered around the center of the driven scroll end plate 41 and extends radially and outwardly from the center of the spiral shape. As shown in Fig. 6 and Fig. 7, the driven scroll body 43 has a front end surface 430.

[0069] The extension length of the driven scroll body 43 extending forward from the second front surface 411 of the driven scroll end plate 41 is equal to the extension length of the drive scroll body 33 extending rearward from the first rear surface 312 of the drive scroll end plate 31. Accordingly, the extension length of the drive scroll peripheral wall 35 extending rearward from the first rear surface 312 of the drive scroll end plate 31 is longer than the extension length of the driven scroll body 43 extending forward from the second front surface 411 of the driven scroll end plate 41.

[0070] As in Fig. As shown in Fig. 5, the driven mechanism 20 includes six anti-rotation pins 21 and six rings 22. The number of anti-rotation pins 21 and the number of rings 22 can be designed as needed, as long as each of them is three or more.

[0071] In this compressor, the drive scroll 30 and the driven scroll 40 are assembled such that the cover body 37 is spaced apart from the drive scroll body 33 and the drive scroll peripheral wall 35 in the direction of the drive axis O1. This configuration allows the space 14 to be formed between the flange portion 35b of the drive scroll peripheral wall 35 and the cover portion 37a of the cover body 37 (see Fig. 3).

[0072] In the driven scroll 40, the spacer 18 is arranged in the through hole 41a of the driven scroll end plate 41. As shown in Fig. As shown in Fig. 6, the second front surface 411 of the driven scroll end plate 41 and the driven scroll body 43 face the drive scroll end plate 31, and a peripheral portion of the driven scroll end plate 41, which is radially outside the driven scroll body 43 with the spacers 18 and the through holes 41a, is placed in the space 14. Accordingly, the driven scroll end plate 41 is rotatably disposed between the drive scroll peripheral wall 35 and the cover body 37.

[0073] The diameter of the driven scroll end plate 41 is larger than the diameters of the drive scroll circumferential wall 35, the cover body 37 and the rotor 11, so that a part of the driven scroll end plate 41, that is, the circumferential portion of the driven scroll end plate 41, with the driven scroll end plate 41 positioned between the drive scroll circumferential wall 35 and the cover body 37, extends outward from the drive scroll circumferential wall 35 and the cover body 37 in the radial direction of the driven scroll end plate 41, as shown in Fig. 7. This configuration, in which the driven scroll end plate 41 is positioned between the drive scroll peripheral wall 35 and the cover body 37, allows the drive scroll body 33 and the driven scroll body 43 to engage with each other. The drive scroll body 33 and the driven scroll body 43 face each other to form a compression chamber 12. In Fig. 5, the anti-rotation pin 20 is placed in the ring 22.

[0074] The screw hole 35c of the drive scroll peripheral wall 35, the screw hole 37d of the cover body 37, and the spacer 18 are aligned with the driven scroll end plate 41 positioned between the drive scroll peripheral wall 35 and the cover body 37 in the direction of the drive axis O1. As shown in Fig. 5 and Fig. As shown in Fig. 6, the screw 71 is inserted from the rear end surface 372 of the cover body 37 into the screw hole 37d, the spacer 18, and the screw hole 35c, so that the cover body 37 is fixed to the drive scroll peripheral wall 35 by the screw 71 in the direction of the drive axis O1. The cover body 37 is fixed to the drive scroll peripheral wall 35 by the screw 71 in such a manner that the first suction port 37c of the cover body 37 is connected to the second suction port 41c of the driven scroll end plate 41 in the direction of the drive axis O1. The first suction port 37c and the second suction port 41c are connected to the compression chamber 12.

[0075] In this manner, the drive scroll 30 and the driven scroll 41 are assembled with the driven scroll end plate 41 positioned between the drive scroll peripheral wall 35 and the cover body 37, so that the drive scroll 30 and the driven scroll 40 cooperate to form a scroll compression part 100. The driven scroll end plate 41 moves in the through hole 41a with respect to the spacer 18 through which the screw 71 is inserted, so that the driven scroll 40 rotates about the driven axis O2 with respect to the drive scroll 30.

[0076] As in Fig. 6, the spacer 18 has a length corresponding to the first length L1 in the direction of the drive axis O1, and the front end and the rear end of the spacer 18 are connected to the driven scroll end plate 41 positioned between the drive scroll peripheral wall 35 and the cover body 37, respectively, in contact with the first opposing surface 351 of the drive scroll peripheral wall 35 and the second opposing surface 371 of the cover body 37. This configuration sets the distance between the first opposing surface 351 and the second opposing surface 371, that is, the length of the space 14 in the direction of the drive axis O1, equal to the first length L1.

[0077] The driven scroll end plate 41 has a thickness serving as the second length L2, which is shorter than the first length L1. The difference in length between the first length L1 and the second length L2 allows the first opposing surface 351, the second opposing surface 371, and the driven scroll end plate 41 to cooperate to define a first gap S1 in the space 14 in a state where the drive scroll 30 and the driven scroll 40 are assembled.

[0078] Specifically, the first gap S1 consists of a gap S11 formed in the direction of the drive axis O1 between the first opposing surface 351 and the second front surface 411 of the driven scroll end plate 41, and a gap S12 formed in the direction of the drive axis O1 between the second opposing surface 371 and the second rear surface 412 of the driven scroll end plate 41. When the driven scroll end plate 41 is located in the center of the space 14 in the direction of the drive axis O1, the gap S11 and the gap S12 have the same length and are each half the length of the first gap S1. As the driven scroll end plate 41 approaches the first opposing surface 351 in the space 14, the length of the gap S11 decreases, and the length of the gap S12 therefore increases.When the second front surface 411 comes into contact with the first opposing surface 351, the length of the gap S12 reaches its maximum, while the length of the gap S11 decreases to zero, so that only the gap S12 forms the first gap S1. When the second rear surface 412 comes into contact with the second opposing surface 371, the length of the gap S11 reaches its maximum, while the length of the gap S12 decreases to zero, so that only the gap S11 forms the first gap S1.

[0079] In a state where the drive scroll 30 and the driven scroll 40 are assembled, the first rear surface 312 of the drive scroll end plate 31 and the front end surface 430 of the driven scroll body 43 cooperate to define a second gap S2 in the direction of the drive axis O1. Similarly, the second front surface 411 of the driven scroll end plate 41 and the rear end surface 330 of the drive scroll body 33 cooperate to define a third gap S3 in the direction of the drive axis O1.

[0080] The extension length of the drive scroll body 33, which extends rearward from the first rear surface 312 of the drive scroll end plate 31, is equal to the extension length of the driven scroll body 43, which extends forward from the second front surface 411 of the driven scroll end plate 41. The extension lengths of the drive scroll body 33 and the driven scroll body 43 are shorter than the extension length of the drive scroll peripheral wall 35, which extends rearward from the first rear surface 312 of the drive scroll end plate 31. Accordingly, in the compressor, the second gap S2 and the third gap S3 have the same length, and each of the lengths of the second gap S2 and the third gap S3 is longer than the length of the first gap S1. In the figures, such as Fig. 6, the first to third gaps S1 to S3 are represented by an elevation to facilitate explanation.

[0081] After the drive spiral 30 and the driven spiral 40 are assembled, the first sliding bearing 51 is inserted into the insertion hole 37e of the cover body 37 of the drive spiral 30, as shown in Fig. 1. The boss portion 37b, that is, the cover body 37, is rotatably supported by the first support portion 64 via the first sliding bearing 51. The boss portion 31b of the drive scroll end plate 31 of the drive scroll 30 is fitted into the second sliding bearing 52. The drive scroll end plate 31 is rotatably supported by the second support portion 66 via the second sliding bearing 52. Accordingly, the drive scroll 30 is disposed in the suction chamber 65 and supported by the first support portion 64 and the second support portion 66 of the housing 6, so that the drive scroll 30 is rotatable about the drive axis O1.

[0082] The discharge chamber 38 is connected to the discharge connection chamber 13 through the boss portion 31b inserted into the second sliding bearing 52. Accordingly, the discharge chamber 38 is connected to the outside of the housing 6 through the discharge connection chamber 13 and the discharge connection port 69.

[0083] In the driven scroll 40, the driven pin 55 is inserted into the pin hole 4 of the first support portion 64. Accordingly, the driven scroll 40 is disposed in the suction chamber 65 and supported by the first support portion 64, so that the driven scroll 40 is rotated about the driven axis O2 by the driven shaft 16. That is, unlike the drive scroll 30, the driven scroll 40 is supported only by the first support portion 64 of the housing 6, so that the driven scroll 40 is rotatable about the driven axis O2.

[0084] In the compressor with such a configuration, the refrigerant gas at a low temperature and low pressure is sucked from the evaporator into the suction chamber 65 through the inlet connection port 68. The drive scroll 30 is rotated around the drive axis O1 by the rotation of the rotor 11 driven by the electric motor 10 in the suction chamber 65. That is, the drive scroll 30 and the rotor 11 rotate together. In the driven mechanism 20, each of the anti-rotation pins 21 slides on the inner peripheral surface of the ring 22, allowing the ring 22 to rotate about and relative to the center of the anti-rotation pin 21. Thus, the driven mechanism 20 transmits torque from the drive scroll 30 to the driven scroll 40.

[0085] The driven scroll 40 is eccentric to the drive scroll 30 and rotates about the driven axis O2 through the drive scroll 30 and the driven mechanism 20. The driven mechanism 20 prevents the driven scroll 40 from rotating about its own axis. Accordingly, the driven scroll 40 orbits about the driven axis O2 with respect to the drive scroll 30.

[0086] In a state where the driven scroll end plate 41 is positioned between the drive scroll peripheral wall 35 and the cover body 37, the first gap S1 is defined by the first opposing surface 351, the second opposing surface 371, and the driven scroll end plate 41. This configuration of the compressor prevents interference between the drive scroll peripheral wall 35, the cover body 37, and the driven scroll end plate 41 when the driven scroll 40 revolves around the driven axis O2.

[0087] The drive scroll 30 and the driven scroll 40 are both rotated to change the volume of the compression chamber 12. This causes the refrigerant gas in the suction chamber 56 to be sucked into the compression chamber 12 through the first suction port 37c and the second suction port 41c. The refrigerant gas sucked into the compression chamber 12 is compressed in the compression chamber 12 while flowing from the peripheral portions of the drive scroll body 33 and the driven scroll body 43 toward the centers of the drive scroll body 33 and the driven scroll body 43. The refrigerant gas compressed to a discharge pressure in the discharge chamber 12 is discharged through the discharge port 32 to the discharge chamber 38 and further discharged through the discharge compression chamber 13 and the discharge connection port 69 to the condenser. In this way, air conditioning is performed by the vehicle air conditioner.

[0088] When the compressor is operating, the driven scroll 40 is inevitably affected by a tilting moment generated by the reaction force of the refrigerant gas compressed in the compression chamber 12, causing the driven scroll 40 to tilt with respect to the directions of the drive axis O1 and the driven axis O2. In this regard, this compressor prevents the front end portion of the driven scroll body 43, which has the front end surface 430, from coming into contact with the first rear surface 312 of the drive scroll end plate 31, even when the driven scroll 40 is tilted by the tilting moment. Furthermore, this compressor prevents the rear end portion of the drive scroll body 33, which has the rear end surface 330, from coming into contact with the second front surface 411 of the driven scroll end plate 41.In the following, these obstacles are described in contrast to a compressor of a comparison example.

[0089] As in Fig. As shown in Fig. 8, in the compressor of the comparative example, the driven scroll end plate 41 is arranged between the drive scroll peripheral wall 35 and the cover body 37 in a manner similar to the compressor of the embodiment of the present invention when the drive scroll 30 and the driven scroll 40 are assembled. The drive scroll 30 and the driven scroll 40 of the compressor of the comparative example have a drive scroll body 34 and a driven scroll body 44, respectively.

[0090] In a state where the drive scroll 30 and the driven scroll 40 of the compressor of the comparative example are assembled, the first rear surface 312 of the drive scroll end plate 31 and a front end surface 440 of the driven scroll body 44 cooperate to define a fourth gap S4 in the direction of the drive axis O1. The second front surface 411 of the driven scroll end plate 41 and a rear end surface 340 of the drive scroll body 34 cooperate to define a fifth gap S5 in the direction of the drive axis O1.

[0091] The extension lengths of the drive scroll body 34 and the driven scroll body 44 are longer in the direction of the drive axis O1 than the extension lengths of the drive scroll body 33 and the driven scroll body 43 of the compressor according to the embodiment of the present invention. That is, the extension length of the drive scroll body 34 extending rearward from the first rear surface 312 is longer than the extension length of the drive scroll body 33 of the compressor according to the embodiment of the present invention, and the extension length of the driven scroll body 44 extending forward from the second front surface 411 is longer than the extension length of the driven scroll body 43 of the compressor according to the embodiment of the present invention.The extension lengths of the drive scroll body 34 and the driven scroll body 44 are longer than the extension lengths of the drive scroll body 33 and the driven scroll body 44 of the compressor of the embodiment of the present invention, which extend rearward from the first rear surface 312 of the drive scroll end plate 31.

[0092] Accordingly, the lengths of the fourth gap S4 and the fifth gap S5 of the compressor of the comparative example are correspondingly shorter than the lengths of the second gap S2 and the third gap S3 of the compressor of the embodiment of the present invention. The fourth gap S4 and the fifth gap S5 of the compressor of the comparative example have the same length. Each of the lengths of the fourth gap S4 and the fifth gap S5 is shorter than the first gap S1 (the sum of the gap S11 between the first opposing surface 351 and the second front surface 411 and the gap S12 between the second opposing surface 371 and the second rear surface 412).Note that other components of the compressor of the comparative example are the same as those of the first embodiment of the present invention, and components of the comparative example corresponding to those of the first embodiment of the present invention are denoted by the same reference numerals and will not be further discussed here. In . Fig. 8, the fourth gap S4 and the fifth gap S5 are represented by an elevation to facilitate explanation.

[0093] If the compressor of the comparison example, as in Fig. 9, when the driven scroll 40 is tilted by the tilting moment, the second front surface 411 approaches the first opposing surface 351 with respect to the driven axis O2 on one radial side of the driven scroll end plate 41, and the second rear surface 412 approaches the second opposing surface 371 with respect to the driven axis O2 on the other radial side of the driven scroll end plate 41. The tilting of the driven scroll 40 causes the front end portion of the driven scroll body 44, which has the front end surface 440 and the second front surface 411, to correspondingly approach the first rear surface 312 and the rear end portion of the drive scroll body 34, which has the rear end surface 340 of the drive scroll body 34.

[0094] The extension lengths of the drive scroll body 34 and the driven scroll body 44 in the direction of the drive axis O1 are longer than the extension lengths of the drive scroll body 33 and the driven scroll body 43 of the compressor of the embodiment of the present invention, so that the lengths of the fourth gap S4 and the fifth gap S5 are correspondingly shorter than the lengths of the second gap S2 and the third gap S3 of the compressor of the embodiment of the present invention.In the compressor of the comparative example, the rear end portion of the drive scroll body 34 and the front end portion of the driven scroll body 44 come into contact with the second front surface 411 and the first rear surface 312, respectively, before the second front surface 411 comes into contact with the first opposing surface 351 on one radial side of the driven scroll end plate 41 with respect to the driven axis O2, and the second rear surface 412 comes into contact with the second opposing surface 371 on the other radial side of the driven scroll end plate 41 with respect to the driven axis O2.

[0095] Accordingly, in the compressor of the comparative example, the drive scroll body 34 in contact with the driven scroll end plate 41 and the driven scroll body 44 in contact with the drive scroll end plate 31 support the driven scroll which may tilt due to the tilting moment, thereby preventing the driven scroll 40 from tilting due to the tilting moment. In other words, in the compressor of the comparative example, the drive scroll body 34 and the driven scroll body 44 prevent the driven scroll 40 from tilting, thereby preventing the second front surface 411 and the second rear surface 412 of the driven scroll end plate 41 from coming into contact with the first opposing surface 351 of the drive scroll peripheral wall 35 and the second opposing surface 371 of the cover body 37, respectively.This increases the load on the drive scroll body 34 and the driven scroll body 44 of the compressor of the comparative example, so that the drive scroll body 34 and the driven scroll body 44 are easily damaged.

[0096] In contrast, in the compressor of the embodiment of the present invention, the driven scroll end plate 41 is contactable with the drive scroll peripheral wall 35, and when the driven scroll end plate 41 is in contact with the drive scroll peripheral wall 35, the second gap S2 is formed between the front end surface 430 of the driven scroll body 43 and the first rear surface 312 of the drive scroll end plate 31, and the third gap S3 is formed between the rear end surface 330 of the drive scroll body 33 and the second front surface of the driven scroll end plate 41 to prevent the driven scroll body 43 and the drive scroll body 33 from coming into contact with the drive scroll end plate 31 and the driven scroll end plate 41, respectively.Specifically, in the compressor of the embodiment of the present invention, the extending length of the drive scroll peripheral wall 35 extending rearward from the drive scroll end plate 31 is longer than the extending lengths of the drive scroll body 33 and the driven scroll body 43, and the lengths of the second gap S2 and the third gap S3 are longer than the length of the first gap S1.

[0097] As in Fig.7, in the compressor according to the embodiment of the present invention, when the driven scroll 40 is tilted by the tilting moment with respect to the directions of the driving axis O1 and the driven axis O2, the second front surface 411 comes into contact with the first opposing surface 351 on the one radial side of the driven scroll end plate 41 with respect to the driven axis O2, and the second rear surface 412 comes into contact with the second opposing surface 371 on the other radial side of the driven scroll end plate 41 with respect to the driven axis O2 in the space 14, so that the tilting of the driven scroll 40 due to the tilting moment is regulated.Although the front end portion of the driven scroll body 43 approaches the first rear surface 312 of the drive scroll end plate 31 due to the tilting of the driven scroll 40, the driven scroll body 43 does not come into contact with the first rear surface 312. Similarly, although the rear end portion of the drive scroll body 33 approaches the second front surface 411 of the driven scroll end plate 41 due to the tilting of the driven scroll 40, the drive scroll body 33 does not come into contact with the second front surface 411. Furthermore, the driven scroll 40 does not tilt after the tilting of the driven scroll 40 is regulated due to the tilting moment, so that the front end portion of the driven scroll body 43 and the rear end portion of the drive scroll body 33 accordingly no longer approach the first rear surface 312 and the second front surface 411.

[0098] Thus, unlike the compressor of the comparative example, the driven scroll body 43 and the driving scroll body 33 of the compressor according to the embodiment of the present invention do not come into contact with the driving scroll end plate 31 and the driven scroll end plate 41, even if the driven scroll 40 is tilted by the tilting moment with respect to the directions of the driving axis O1 and the driven axis O2.

[0099] Thus, the compressor according to the embodiment of the present invention allows the driven scroll end plate 41 to come into contact with the drive scroll peripheral wall 35 and the cover body 37 in the space 14, thereby enabling the drive scroll peripheral wall 35, the cover body 37, and the driven scroll end plate 41 to adequately support the tilting moment acting on the driven scroll 40. Furthermore, the compressor according to the embodiment of the present invention does not need to support the driven scroll 40 tilted by the tilting moment with the drive scroll body 33 and the driven scroll body 43, thereby eliminating the large load on the drive scroll body 33 and the driven scroll body 43. Accordingly, the compressor according to the embodiment of the present invention prevents the damage to the drive scroll body 33 and the driven scroll body 43.

[0100] The driven scroll end plate 41 has a disc shape and does not have a shape extending in the direction of the drive axis O1, such as the shapes of the drive scroll body 33 and the driven scroll body 43. Accordingly, the driven scroll end plate 41 has sufficient rigidity to support the driven scroll 40 tilted by the tilting moment. This configuration of the compressor according to the embodiment of the present invention prevents damage to the driven scroll end plate 41.

[0101] Therefore, the compressor according to the embodiment of the present invention has excellent durability.

[0102] In particular, the configuration of the compressor in which the cover body 37, with the driven scroll end plate 41 positioned between the drive scroll peripheral wall 35 and the cover body 37, is fixed to the drive scroll peripheral wall 35 by the bolts 71, facilitates positioning of the driven scroll 40 with respect to the drive scroll 30 in the direction of the drive axis O1. Therefore, the compressor facilitates manufacturing of the compressor.

[0103] Furthermore, in this compressor, the presence of the spacer 18 in the through hole 41a allows the gap S11 to be easily formed between the first opposing surface 351 of the drive scroll peripheral wall 35 and the front surface 411 of the driven scroll end plate 41, and the gap S12 to be easily formed between the second opposing surface 371 of the cover body 37 and the second rear surface 412 of the driven scroll end plate 41. This allows the driven scroll end plate 41 to rotate properly with the driven scroll end plate 41 positioned between the drive scroll peripheral wall 35 and the cover body 37, without the driven scroll end plate 41 interfering with the drive scroll peripheral wall 35 and the cover body 37.

[0104] In the compressor, the driven scroll end plate 41 has a diameter larger than the diameters of the drive scroll peripheral wall 35, the cover body 37, and the rotor 11. This configuration reduces the load generated when the driven scroll end plate 41 comes into contact with the first opposing surface 351 of the drive scroll peripheral wall 35 and the second opposing surface 371 of the cover body 37 in the space 14, causing the tilting moment to act on the driven scroll end plate 41. In this regard, the compressor prevents damage to the driven scroll end plate 41.

[0105] In the compressor, increasing the diameter of the driven scroll end plate 41 allows the peripheral portion of the driven scroll end plate 41 to protrude radially outward beyond the drive scroll peripheral wall 35 and the cover body 37, with the driven scroll end plate 41 positioned between the drive scroll peripheral wall 35 and the cover body 37. This configuration of the compressor easily holds the driven scroll end plate 41, which is positioned between the drive scroll peripheral wall 35 and the cover body 37, from the outside of the drive scroll peripheral wall 35 and the cover body 37. This facilitates positioning the driven scroll 40 with respect to the drive scroll 30 in the direction of the drive axis O1 and fixing the cover body 37 to the drive scroll peripheral wall 35 by the screws 71.

[0106] Although the present invention has been described above based on the embodiment, the present invention is not limited to the above-described embodiment and can be modified as needed within the spirit of the present invention.

[0107] For example, instead of the screw 71, the cover body 37 may be fixed to the drive scroll peripheral wall 35 by a pin such as a press-fit pin which is press-fitted into the drive scroll peripheral wall 35 and the cover body 37.

[0108] In the compressor of the embodiment, the spacer 18 is disposed in the through-hole 41a. However, the present invention is not limited to this, and the compressor may include a protrusion or the like inserted through the through-hole 41a from the first opposing surface 351 of the drive scroll peripheral wall 35 and in contact with the second opposing surface 371 to ensure the gap S11 between the first opposing surface 351 and the second front surface 411 and the gap S12 between the second opposing surface 371 and the second rear surface 412.

[0109] In the compressor of the embodiment, the bushing 53 and the driven pin 55 cooperate to form the driven shaft 16. However, the present invention is not limited thereto, and the bushing 53 may be integrally formed with a shaft portion supported by the first support portion 64 to form the driven shaft 16 alone.

[0110] The compressor of the embodiment may have a configuration in which the drive scroll 30 is spaced from the rotor 11 in the direction of the drive axis O1 by operatively connecting the drive scroll 30 to the rotor 11 via a drive shaft.

[0111] In the compressor of the embodiment, the driven mechanism 20 includes the anti-rotation pins 21 and the rings 22. However, the present invention is not limited to this, and the driven mechanism 20 may be configured by a pin-ring-pin mechanism in which two pins slide on an inner peripheral surface of a free ring, a pin-and-pin mechanism in which outer peripheral surfaces of two pins slide against each other, a mechanism using an Oldham shaft coupling, or the like. Industrial applicability

[0112] The present invention is applicable to the air conditioner for the vehicle or the like. List of reference symbols 6 housings 10 Electric motor (drive mechanism) 11 Rotor 12 compression chamber 18 spacers 30 drive spiral 31 Drive spiral end plate 33 Drive spiral body 35 Drive spiral circumferential wall 37 cover body 40 driven spiral 41 Driven spiral end plate 43 Driven-Spirale-Body O1 Drive axle O2 driven axle S2 second gap (gap) S3 third gap (gap) QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited patent literature

[0000] JP 07-229480

[0007]

Claims

[1] A co-rotating scroll compressor comprising: a housing; a drive mechanism; a drive scroll; a driven scroll; and a driven mechanism, wherein the drive spiral is configured to be driven by the drive mechanism to rotate about a drive axis, the driven spiral is eccentric to the drive spiral and is configured to be rotated about a driven axis by the drive spiral and the driven mechanism, the drive scroll has: a drive scroll end plate extending in a direction crossing the drive axis; a drive scroll peripheral wall having a cylindrically extending shape extending from the drive scroll end plate toward the driven scroll; and a drive scroll body disposed within the drive scroll peripheral wall and having a spirally extending shape extending from the drive scroll end plate toward the driven scroll, the driven scroll has: a driven scroll end plate extending in a direction crossing the driven axis; and a driven scroll body having a spirally extending shape extending from the driven scroll end plate toward the drive scroll, and the drive scroll body and the driven scroll body face each other to form a compression chamber and are rotated to change a volume of the compression chamber, wherein the drive spiral has a cover body which is fixed to the drive spiral peripheral wall, the driven scroll end plate is rotatably arranged between the drive scroll peripheral wall and the cover body and the driven scroll end plate is capable of being brought into contact with the drive scroll circumferential wall in a direction of the drive axis, and when the driven scroll end plate is in contact with the drive scroll circumferential wall in the direction of the drive axis, a gap is formed between the driven scroll body and the drive scroll end plate, and a gap is formed between the drive scroll body and the driven scroll end plate to prevent the driven scroll body and the drive scroll body from coming into contact with the drive scroll end plate and the driven scroll end plate, respectively. [2] Co-rotating scroll compressor according to claim 1, wherein a plurality of through holes are formed in a peripheral portion of the driven scroll end plate and a spacer is arranged in each of the through holes to position the driven scroll end plate between the drive scroll peripheral wall and the cover body so that the driven scroll end plate is rotatable. [3] Co-rotating scroll compressor according to claim 1 or 2, wherein the drive mechanism comprises a rotor having a cylindrical shape, surrounding the drive scroll peripheral wall from an outer peripheral side of the drive scroll peripheral wall and being fixed to the drive scroll peripheral wall, and the driven scroll end plate has a diameter that is larger than a diameter of the rotor. [4] Co-rotating scroll compressor according to claim 2, wherein the spacer extends in the direction of the drive axis and a length of the spacer in the direction of the drive axis is a first length, the drive spiral peripheral wall has a first opposite surface with which one end of the spacer is in contact in the direction of the drive axis, the cover body has a second opposite surface with which the other end of the spacer is in contact in the direction of the drive axis, the driven scroll end plate has a thickness in the direction of the drive axis that serves as a second length that is shorter than the first length, a difference in length between the first length and the second length of the first opposing surface, the second opposing surface and the driven scroll end plate allows them to cooperate to define a first gap, the gap between the driven scroll body and the drive scroll end plate is a second gap, the gap between the drive scroll body and the driven scroll end plate is a third gap and each of lengths of the second gap and the third gap is longer than a length of the first gap. [5] A co-rotating scroll compressor according to claim 4, wherein the driven scroll end plate has a front surface and a rear surface on opposite sides of the driven scroll end plate, respectively, a front surface coming into contact with the drive scroll peripheral wall, and the front surface and the rear surface coming into contact with the first opposite surface and the second opposite surface on one radial side and the other radial side, respectively, with respect to the driven axis, so that tilting of the driven scroll with respect to the drive axis and the driven axis is regulated. [6] A co-rotating scroll compressor according to claim 1 or 2, wherein the driven scroll end plate has a peripheral portion projecting radially outward beyond the drive scroll peripheral wall and the cover body.

Images