Electric compressor

Abstract

To provide an electric compressor capable of realizing the potential equalization of a housing while keeping easiness in disassembly of the housing.SOLUTION: A housing 1 storing a compression mechanism and a motor mechanism 7 includes: a metallic first housing portion 15 that has a first joint surface 15e and a first pin hole 15g formed on the first joint surface 15e; a metallic second housing portion 3 that has a second joint surface 3e opposing to the first joint surface 15e and a second pin hole 3h formed at a position opposing to the first pin hole 15g on the second joint surface 3e; a metallic coupling pin 51 in which a press-in portion 511 pressed in the first pin hole 15g and a first abutting portion 51b abutting on an inner peripheral surface of the second pin hole 3f project out from an outer peripheral surface 51a, and has a first inserting portion 512 inserted in the second pin hole 3h so as to be extracted / inserted; and an insulating first gasket 61 that is interposed between the first joint surface 15e and the second joint surface 3e, and has a first pin insertion hole 61b in which the coupling pin 51 is inserted.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present invention relates to an electric compressor.

Background Art

[0002] An example of a conventional electric compressor is disclosed in Patent Document 1. In this electric compressor, a compression mechanism and a motor mechanism are housed in a housing.

[0003] The housing includes a first metal housing portion, a second metal housing portion, an insulating gasket interposed between the first housing portion and the second housing portion, and a metal insertion member.

[0004] A joint surface of the first housing portion facing the second housing portion is formed with a first insertion hole into which one end of the insertion member is inserted. A joint surface of the second housing portion facing the first housing portion is formed with a second insertion hole at a position opposite the first insertion hole, into which the other end of the insertion member is inserted. The gasket is formed with an insertion hole at a position corresponding to the first insertion hole and the second insertion hole, through which the insertion member is inserted.

[0005] The insertion member is formed by winding a thin plate into a cylindrical shape, and is substantially C-shaped when viewed from the axial direction. In a natural state, the insertion member has an outer diameter larger than the inner diameters of the first insertion hole and the second insertion hole.

[0006] In this electric compressor, one end of the insertion member is inserted into the first insertion hole while being reduced in diameter by elastic deformation, and the other end of the insertion member is inserted into the second insertion hole while being reduced in diameter by elastic deformation. As a result, the outer peripheral surface of the insertion member is pressed against the inner peripheral surface of the first insertion hole and the inner peripheral surface of the second insertion hole by elastic force. Consequently, the first housing portion and the second housing portion are electrically and reliably connected to each other via the insertion member, and equipotentiality between the first housing portion and the second housing portion is ensured.

Prior Art Literature

Patent Document

[0007] [Patent Document 1] Japanese Patent Publication No. 2020-70741 [Overview of the project] [Problems that the invention aims to solve]

[0008] However, in the conventional electric compressor described above, the inserting member is inserted into the first and second insertion holes while undergoing elastic deformation. Therefore, if the housing needs to be disassembled for maintenance or other reasons, depending on the elastic force of the inserting member, a large force may be required to remove the second housing from the first housing, potentially making the removal process difficult.

[0009] This invention has been made in view of the above-mentioned conventional circumstances, and aims to solve the problem of providing an electric compressor that can achieve equipotentialization of the housing while maintaining the ease of disassembly of the housing. [Means for solving the problem]

[0010] This invention First An electric compressor is an electric compressor in which a compression mechanism and a motor mechanism are housed within a housing, The housing comprises a first housing portion made of metal having a first joining surface and a first pin hole formed on the first joining surface, A second metal housing portion having a second joining surface facing the first joining surface and a second pin hole formed on the second joining surface at a position facing the first pin hole, A metal connecting pin having a cylindrical outer surface, provided at one end of the connecting pin and Press-fitted into the first pin hole ru Press-fit section and The connecting pin is provided on the other end side from the press-fit portion and extends radially outward from the outer surface. It protrudes and is inserted into the second pin hole in a removable manner. The first insertion portion having a first contact portion that contacts the inner circumferential surface of the second pin hole, Connecting pin and The present invention comprises an insulating first gasket interposed between the first joining surface and the second joining surface, having a first pin insertion hole through which the connecting pin is inserted. 、 The outer diameter of the circumscribed circle that contacts the tip projection of the first contact portion is larger than the diameter of the press-fit portion. The diameter of the second pin hole is larger than the diameter of the first pin hole. It is characterized by the following:

[0011] In the electric compressor of the present invention, the first insertion portion of the connecting pin is removably inserted into the second pin hole of the second housing portion. That is, the outer surface of the first insertion portion is not pressed against the inner surface of the second pin hole by elastic force. Therefore, when disassembling the housing, the first insertion portion can be easily removed from the second pin hole. Furthermore, when removing the first insertion portion from the second pin hole, the connecting pin, whose press-fit portion is press-fitted into the first pin hole of the first housing portion, does not fall out of the first pin hole. Thus, the second housing portion can be easily removed from the first housing portion.

[0012] Furthermore, the press-fit portion is pressed into the first pin hole, electrically connecting the first housing portion and the connecting pin, and the first contact portion of the first insertion portion contacts the inner circumferential surface of the second pin hole, electrically connecting the second housing portion and the connecting pin. As a result, the first housing portion and the second housing portion become equipotential via the connecting pin.

[0013] Therefore, the electric compressor of the present invention can achieve equipotentialization of the housing while maintaining the ease of disassembly of the housing.

[0014] Preferably, the second pin hole penetrates the second housing portion, and the second housing portion has a third joint surface facing away from the second joint surface. Preferably, the housing further comprises a third housing portion made of metal, an insulating second gasket, and a metal fastening member. The third housing portion may have a fourth joint surface facing the third joint surface, and a third pin hole formed on the fourth joint surface at a position facing the second pin hole. The second gasket is interposed between the third joint surface and the fourth joint surface and may have a second pin insertion hole through which the connecting pin is inserted. The fastening member can fasten the first housing portion and the third housing portion with the second housing portion in between. Preferably, the connecting pin further has a second insertion portion located on the opposite side of the press-fit portion from the first insertion portion in the longitudinal direction of the connecting pin. Preferably, the outer diameter of the second insertion portion is smaller than the inner diameter of the third pin hole.

[0015] In this case, when disassembling the housing, after unfastening the fastening member, the second insertion portion of the connecting pin, which has an outer diameter smaller than the inner diameter of the third pin hole of the third housing portion, can be easily pulled out from the third pin hole. Therefore, the third housing portion can be easily removed from the second housing portion.

[0016] Furthermore, since the first housing portion and the third housing portion are fastened together by the fastening member, the head of the fastening member abuts against one of the first housing portion and the third housing portion, so that said one housing portion and the fastening member are electrically connected; and the threaded portion of the fastening member abuts against the other of the first housing portion and the third housing portion, so that said the other housing portion and the fastening member are electrically connected. Therefore, the first housing portion and the third housing portion are equipotential via the fastening member. Further, since the first housing portion and the second housing portion are equipotential via the connecting pin, the first housing portion, the second housing portion and the third housing portion are all equipotential.

[0017] It is preferable that the first contact portion includes: a groove portion recessedly provided on the outer circumferential surface of the connecting pin, and a pair of protruding portions protruding from the outer circumferential surface and arranged side by side in the circumferential direction of the connecting pin with the groove portion interposed therebetween.

[0018] In this case, pressing is performed on a predetermined position of the outer circumferential surface of the connecting pin to simultaneously form the groove portion and the pair of protruding portions, whereby the first contact portion of the connecting pin can be easily formed.

[0019] It is preferable that there are a plurality of first contact portions.

[0020] In this case, the first contact portion of the first insertion portion abuts against the inner circumferential surface of the second pin hole with high reliability, so that the second housing portion and the connecting pin are electrically connected with high reliability.

[0021] It is preferable that the plurality of first contact portions are arranged at equal intervals in the circumferential direction of the connecting pin.

[0022] In this case, the center of the circumscribed circle of each first contact portion is likely to coincide with the center of the second pin hole. Therefore, when positioning the second housing portion relative to the first housing portion by the connecting pin, this is to advantageous for improving positioning accuracy.

[0023] It is preferable that the second pin hole penetrates the second housing portion, and the second housing portion has a third joint surface facing the opposite side to the second joint surface. Further, it is preferable that the housing further includes a metallic third housing portion and an insulating second gasket. The third housing portion may have a fourth joint surface facing the third joint surface, and a third pin hole formed at a position facing the second pin hole in the fourth joint surface. The second gasket may be interposed between the third joint surface and the fourth joint surface, and have a second pin insertion hole through which the connecting pin is inserted. Further, it is preferable that the connecting pin further includes a second insertion portion arranged on an opposite side of the press-fit portion with respect to the first insertion portion in a longitudinal direction of the connecting pin. It is preferable that the second insertion portion has a second contact portion that protrudes from an outer peripheral surface of the second insertion portion and abuts against an inner peripheral surface of the third pin hole, and is inserted into and removable from the third pin hole.

[0024] In this case, the second insertion portion of the connecting pin is inserted into and removable from the third pin hole of the third housing portion. That is, the outer peripheral surface of the second insertion portion is not pressed against the inner peripheral surface of the third pin hole by elastic force. Therefore, when disassembling the housing, the second insertion portion can be easily pulled out from the third pin hole. As a result, the third housing portion can be easily removed from the second housing portion.

[0025] Further, the third housing portion and the connecting pin are electrically connected by the second contact portion of the second insertion portion abutting against the inner peripheral surface of the third pin hole. Then, the first housing portion and the second housing portion are electrically connected via the connecting pin. As a result, the first housing portion, the second housing portion and the third housing portion are electrically connected via the connecting pin and become equipotential. The second electric compressor of the present invention is an electric compressor in which a compression mechanism and a motor mechanism are housed in a housing, The housing comprises a first housing portion made of metal having a first joining surface and a first pin hole formed on the first joining surface, A second metal housing portion having a second joining surface facing the first joining surface and a second pin hole formed on the second joining surface at a position facing the first pin hole, A metal connecting pin having a press-fit portion that is press-fitted into the first pin hole, and a first insertion portion that is inserted into the second pin hole so as to be removable, with the first contact portion that abuts against the inner circumferential surface of the second pin hole protruding from the outer circumferential surface, The present invention comprises an insulating first gasket interposed between the first joint surface and the second joint surface, having a first pin insertion hole through which the connecting pin is inserted, The equipped 2 pin hole penetrates the equipped 2 housing portion, The second housing portion has a third joining surface facing the opposite side of the second joining surface, The housing comprises a metal third housing portion having a fourth joining surface facing the third joining surface and a third pin hole formed on the fourth joining surface at a position facing the second pin hole, An insulating second gasket interposed between the third joint surface and the fourth joint surface, having a second pin insertion hole through which the connecting pin is inserted, The present invention further comprises a metal fastening member that fastens the first housing portion and the third housing portion with the second housing portion in between, The connecting pin further has a second insertion portion located on the opposite side of the press-fit portion from the first insertion portion in the longitudinal direction of the connecting pin, The outer diameter of the second insertion portion is smaller than the inner diameter of the third pin hole. [Effects of the Invention]

[0026] The electric compressor of the present invention can achieve equipotentialization of the housing while maintaining the ease of disassembly of the housing. [Brief explanation of the drawing]

[0027] [Figure 1] Figure 1 is a cross-sectional view of the electric compressor of Example 1. [Figure 2] Figure 2 is a front view of the connecting pins of the electric compressor of Embodiment 1. [Figure 3] Figure 3 relates to the electric compressor of Example 1 and is a cross-sectional view taken along line AA in Figure 2. [Figure 4] Figure 4 is a partial cross-sectional view showing an enlarged view of the connecting pin and its vicinity in relation to the electric compressor of Embodiment 1. [Figure 5] Figure 5 is a partial cross-sectional view showing an enlarged view of the fastening member and its vicinity in relation to the electric compressor of Embodiment 1. [Figure 6] Figure 6 is a partial perspective view of the electric compressor of Embodiment 1, showing the state in which the connecting pin has been inserted into the first housing. [Figure 7] Figure 7 is a schematic diagram illustrating the equipotentiality of the housing in the electric compressor of Example 1. [Figure 8] Figure 8 is a schematic diagram illustrating the equipotentiality of the housing in the electric compressor of Example 2. [Modes for carrying out the invention]

[0028] Examples 1 and 2, which embody the present invention, will be described below with reference to the drawings.

[0029] (Example 1) The electric compressor of Example 1 (hereinafter simply referred to as the compressor) is an electric compressor for a vehicle's air conditioning system, as shown in Figure 1. This compressor comprises a housing 1, a drive shaft 5, a motor mechanism 7, a fixed scroll 9, a movable scroll 11, and an elastic plate 47.

[0030] Housing 1 includes a motor housing 15, a first gasket 61, a shaft support housing 3, a second gasket 63, a compression section housing 13, a connecting pin 51, and a bolt 25.

[0031] The motor housing 15 is an example of the "first housing part" in the present invention. The shaft support housing 3 is an example of the "second housing part" in the present invention. The compression housing 13 is an example of the "third housing part" in the present invention. The drive shaft 5, fixed scroll 9, movable scroll 11, and elastic plate 47 are an example of the "compression mechanism" in the present invention. The bolt 25 is an example of the "fastening member" in the present invention.

[0032] In this embodiment, as shown in Figure 1, the front-to-back direction of the compressor is defined by defining the side where the motor housing 15 is located as the front side of the compressor and the side where the compression unit housing 13 is located as the rear side of the compressor. The up-and-down direction of the compressor is also defined. Note that these directions are examples for the sake of explanation, and the orientation of the compressor will be changed as appropriate to the vehicle on which it is mounted.

[0033] As shown in Figures 2 to 4, the connecting pin 51 is made of metal and is substantially cylindrical in shape. The connecting pin 51 has a cylindrical outer surface 51a with an outer diameter d, and three first contact portions 51b that project radially outward from the outer surface 51a at the center of the connecting pin 51 in the longitudinal direction. The three first contact portions 51b are arranged at equal intervals of 120 degrees in the circumferential direction of the outer surface 51a. The diameter D of the circumscribed circles C of the three first contact portions 51b, that is, the circumscribed circles C that contact the protruding tips of each projection 53 of each first contact portion 51b (described later), is larger than the outer diameter d of the outer surface 51a.

[0034] Each first contact portion 51b is formed by press-forming a predetermined position on the outer peripheral surface 51a. Each first contact portion 51b has a groove 52 recessed in the outer peripheral surface 51a and extending in the longitudinal direction, and a pair of protrusions 53 protruding from the outer peripheral surface 51a and extending in the longitudinal direction, arranged side by side in the circumferential direction of the outer peripheral surface 51a with the groove 52 in between.

[0035] The connecting pin 51 has a press-fit portion 511, a first insertion portion 512, and a second insertion portion 513, which are arranged in this order from one end to the other in the longitudinal direction. The press-fit portion 511 and the second insertion portion 513 are formed as so-called straight portions extending in the longitudinal direction with a constant outer diameter d in the regions at both ends in the longitudinal direction of the connecting pin 51. The first insertion portion 512 is formed in the central region in the longitudinal direction of the connecting pin 51, and three first contact portions 51b are formed on the outer circumferential surface 51a of the first insertion portion 512.

[0036] As shown in Figure 5, the bolt 25 is made of metal, and its head 25a and shaft 25b are integrally formed. A male threaded portion 25c is provided at the tip of the shaft 25b.

[0037] As shown in Figure 1, the motor housing 15 is a bottomed cylindrical shape and has a front wall 15a and a first circumferential wall 15b. The front wall 15a is located at the front end of the motor housing 15 and extends radially. The first circumferential wall 15b extends rearward from the front wall 15a in the direction of the drive axis O of the drive shaft 5. The motor chamber 17 is formed inside the motor housing 15 by these front wall 15a and first circumferential wall 15b. The drive axis O is parallel to the front-rear direction of the compressor.

[0038] An intake port 15c leading to the motor chamber 17 is formed in the first peripheral wall 15b of the motor housing 15. The intake port 15c is connected to an evaporator (not shown), and the refrigerant, which is a fluid that has passed through the evaporator, is drawn into the motor chamber 17. In other words, the motor chamber 17 also serves as an intake chamber.

[0039] A support portion 15d is formed on the front wall 15a of the motor housing 15, projecting from the front wall 15a toward the motor chamber 17. The support portion 15d is cylindrical in shape and has a first radial bearing 19 inside.

[0040] As shown in Figures 4 to 7, the rear end surface 15e of the first circumferential wall 15b has six bottomed female screw holes 15f into which the male threaded portion 25c of the bolt 25 is screwed. The rear end surface 15e is an example of the "first joining surface" in the present invention. Each female screw hole 15f is arranged at equal intervals in the circumferential direction of the first circumferential wall 15b, i.e., at a 60-degree pitch. In addition, two bottomed first pin holes 15g are formed on the rear end surface 15e of the first circumferential wall 15b. Each first pin hole 15g is arranged at a 180-degree pitch in the circumferential direction of the first circumferential wall 15b. Each first pin hole 15g has a circular cross-section and an inner diameter smaller than the outer diameter d of the outer circumferential surface 51a of the connecting pin 51, i.e., the outer diameter d of the outer circumferential surface 51a of the press-fit portion 511. That is, the press-fit portion 511 of the connecting pin 51 is press-fitted into the first pin holes 15g.

[0041] As shown in Figure 1, the support housing 3 is provided between the motor housing 15 and the compression housing 13. Six first bolt insertion holes 3g are formed on the outer peripheral edge of the support housing 3 at positions corresponding in the circumferential direction to each female screw hole 15f of the first circumferential wall 15b. Each first bolt insertion hole 3g penetrates the support housing 3 in the front-rear direction. Each first bolt insertion hole 3g has an inner diameter larger than the outer diameter of the shaft portion 25b of the bolt 25.

[0042] Furthermore, two second pin holes 3h are formed on the outer peripheral edge of the pivot housing 3 at positions corresponding in the circumferential direction to each first pin hole 15g in the first circumferential wall 15b. Each second pin hole 3h penetrates the pivot housing 3 in the front-rear direction. Each second pin hole 3h has a circular cross-section, is larger than the outer diameter d of the outer peripheral surface 51a of the connecting pin 51, and has an inner diameter equivalent to the diameter D of the circumscribed circle C of each first contact portion 51b. That is, the projection 53 of the first contact portion 51b in the first insertion portion 512 of the connecting pin 51 abuts against the inner circumferential surface of the second pin hole 3h, and the first insertion portion 512 is inserted into the second pin hole 3h so as to be removable.

[0043] The compression section housing 13 is cylindrical with a bottom and has a rear wall 13a and a second circumferential wall 13b. The rear wall 13a is located at the rear end of the compression section housing 13 and extends radially across the compression section housing 13. The second circumferential wall 13b extends forward from the rear wall 13a in the direction of the drive axis O.

[0044] Six second bolt insertion holes 13g are formed in the second circumferential wall 13b of the compression housing 13, at positions corresponding in the circumferential direction to each female screw hole 15f of the first circumferential wall 15b. Each second bolt insertion hole 13g penetrates the compression housing 13 in the front-rear direction. Each second bolt insertion hole 13g has an inner diameter larger than the outer diameter of the shaft portion 25b of the bolt 25. In addition, two bottomed third pin holes 13h are formed in the second circumferential wall 13b of the compression housing 13, at positions corresponding in the circumferential direction to each first pin hole 15g of the first circumferential wall 15b. Each third pin hole 13h has a circular cross-section and an inner diameter larger than the outer diameter d of the outer circumferential surface 51a of the connecting pin 51.

[0045] The compression housing 13 has an oil separation chamber 13c and a discharge port 13f. A cylindrical separation cylinder 21 is fixed inside the oil separation chamber 13c. A separator is formed by the outer surface of the separation cylinder 21 and the inner surface of the oil separation chamber 13c. The discharge port 13f leads to the oil separation chamber 13c and is also connected to a condenser (not shown).

[0046] The first gasket 61 and the second gasket 63 are formed of synthetic rubber at least on their surface and are insulating. The first gasket 61 is interposed between the rear end surface 15e of the motor housing 15 and the front end surface 3e of the support housing 3 which faces the rear end surface 15e in the front-rear direction, sealing the space between the motor housing 15 and the support housing 3. The second gasket 63 is interposed between the rear end surface 3d of the support housing 3 and the front end surface 13i of the compression housing 13 which faces the rear end surface 3d in the front-rear direction, sealing the space between the support housing 3 and the compression housing 13. The front end surface 3e of the support housing 3 is an example of the "second joining surface" in the present invention. The rear end surface 3d of the support housing 3 is an example of the "third joining surface" in the present invention. The front end surface 13i of the compression housing 13 is an example of the "fourth joining surface" in the present invention.

[0047] The first gasket 61 has six bolt insertion holes 61a formed at positions corresponding to each female screw hole 15f in the first circumferential wall 15b in the circumferential direction. The first gasket 61 also has two first pin insertion holes 61b formed at positions corresponding to each first pin hole 15g in the first circumferential wall 15b in the circumferential direction. Similarly, the second gasket 63 also has six bolt insertion holes 63a formed at positions corresponding to each female screw hole 15f in the first circumferential wall 15b in the circumferential direction. The second gasket 63 also has two second pin insertion holes 63b formed at positions corresponding to each first pin hole 15g in the first circumferential wall 15b in the circumferential direction. The inner diameters of the bolt insertion holes 61a and 63a are larger than the outer diameter of the shaft portion 25b of the bolt 25. The inner diameter of the first pin insertion hole 61b and the inner diameter of the second pin insertion hole 63b are larger than the outer diameter d of the outer surface 51a of the connecting pin 51.

[0048] The motor housing 15, the support housing 3, and the compression housing 13 are fastened together by a number of bolts 25 (six in this embodiment) from the compression housing 13 side, with a first gasket 61 interposed between the motor housing 15 and the support housing 3, and a second gasket 63 interposed between the support housing 3 and the compression housing 13.

[0049] In the fastened state where the motor housing 15 and the compression housing 13 are fastened together by bolts 25 with the support housing 3 in between, the head 25a of each bolt 25 abuts against the compression housing 13, the shaft portion 25b of each bolt 25 is inserted non-contactingly into the second bolt insertion holes 13g of the compression housing 13 and the first bolt insertion holes 3g of the support housing 3, and the male threaded portion 25c of each bolt 25 is screwed into the female threaded holes 15f of the motor housing 15. The shaft portion 25b of each bolt 25 is inserted non-contactingly into the bolt insertion holes 61a of the first gasket 61 and the bolt insertion holes 63a of the second gasket 63.

[0050] Furthermore, in the fastened state described above, the press-fit portion 511 of each connecting pin 51 is press-fitted into each first pin hole 15g of the motor housing 15, the protrusions 53 of each first contact portion 51b of the first insertion portion 512 of each connecting pin 51 abut against the inner circumferential surface of each second pin hole 3h of the pivot housing 3, and the second insertion portion 513 of each connecting pin 51 is inserted non-contacting the inner circumferential surface of each third pin hole 13h of the compression housing 13.

[0051] The support housing 3 has a boss 3a that protrudes toward the motor chamber 17. Multiple rotation-preventing pins 31 are fixed to the rear side of the support housing 3, extending toward the rear from the support housing 3. In addition, a first intake passage 3c is formed on the outer circumference of the support housing 3, penetrating the support housing 3 in the front-rear direction.

[0052] The drive shaft 5 extends in the direction of the drive axis O and has a small diameter portion 5a at the front end and a large diameter portion 5b at the rear end. An eccentric pin 50 is fixed to the rear end surface of the large diameter portion 5b, extending rearward at an eccentric position from the drive axis O. The eccentric pin 50 is fitted into a bush 50a within the boss 3a.

[0053] The small-diameter portion 5a of the drive shaft 5 is rotatably supported by the support portion 15d of the motor housing 15 via the first radial bearing 19. The rear end of the large-diameter portion 5b is rotatably supported by the second radial bearing 27 within the boss 3a. The drive shaft 5 is rotatable around the drive shaft center O within the housing 1.

[0054] The motor mechanism 7 is housed within the motor chamber 17. The motor mechanism 7 includes a stator 7a and a rotor 7b. The stator 7a is fixed to the inner surface of the first peripheral wall 15b. The stator 7a is connected to an inverter (not shown) located outside the motor housing 15.

[0055] The rotor 7b is located within the stator 7a and is fixed to the large-diameter portion 5b of the drive shaft 5. The rotor 7b rotates within the stator 7a, thereby rotating the drive shaft 5 around the drive shaft center O.

[0056] The fixed scroll 9 is fixed to the compression housing 13 and is located on the inner side of the second peripheral wall 13b. The fixed scroll 9 has a fixed substrate 9a, a fixed spiral wall 9b, and an annular outer peripheral wall 9c. The fixed substrate 9a is located at the rear end of the fixed scroll 9 and is formed in a disc shape. The fixed spiral wall 9b is located radially inward of the outer peripheral wall 9c and extends forward from the fixed substrate 9a.

[0057] A discharge chamber 35 is formed between the rear surface of the fixed substrate 9a and the front surface of the rear wall 13a of the compression housing 13. A discharge port 9d is formed in the fixed substrate 9a, penetrating it. The discharge port 9d connects the discharge chamber 35 to the compression chamber 45, which will be described later. The discharge chamber 35 is connected to the oil separation chamber 13c through the discharge passage 13e.

[0058] A discharge reed valve 37 and a retainer 39 are attached to the fixed substrate 9a. The discharge reed valve 37 and retainer 39 are located inside the discharge chamber 35. The discharge reed valve 37 opens and closes the discharge port 9d by elastic deformation. The retainer 39 adjusts the amount of elastic deformation of the discharge reed valve 37.

[0059] A second intake passage 9e is formed between the outer peripheral wall 9c and the second outer peripheral wall 13b of the compression housing 13. An intake port 9f is formed in the outer peripheral wall 9c, which connects the second intake passage 9e to the compression chamber 45, which will be described later.

[0060] The movable scroll 11 is located within the compression housing 13, between the fixed scroll 9 and the support housing 3. The movable scroll 11 has a movable base plate 11a and a movable spiral wall 11b. The movable base plate 11a is located at the front end of the movable scroll 11 and is formed in a disc shape. A bush 50a is rotatably supported on the movable base plate 11a via a third radial bearing 41. As a result, the movable scroll 11 is connected to the drive shaft 5 at an eccentric position from the drive shaft center O via the bush 50a and the eccentric pin 50.

[0061] Furthermore, the movable substrate 11a has recessed rotation-preventing holes 11c that loosely receive the tips of each rotation-preventing pin 31. A cylindrical ring 43 is loosely fitted into each rotation-preventing hole 11c. As each rotation-preventing pin 31 slides and rolls along the inner circumferential surface of the ring 43, the movable scroll 11 is restricted from rotating on its own axis and is able to revolve.

[0062] The movable spiral wall 11b extends from the front surface of the movable substrate 11a toward the fixed substrate 9a. Near the center of the movable spiral wall 11b, an air supply hole 11d is provided, which opens at the front end of the movable spiral wall 11b and extends in the front-rear direction through the movable spiral wall 11b to penetrate to the movable substrate 11a.

[0063] The fixed scroll 9 and the movable scroll 11 are meshed with each other. As a result, a compression chamber 45 is formed between the fixed scroll 9 and the movable scroll 11 by the fixed substrate 9a, the fixed spiral wall 9b, the movable substrate 11a, and the movable spiral wall 11b. The compression chamber 45 is in communication with the motor chamber 17, which functions as an intake chamber, via the first intake passage 3c, the second intake passage 9e, and the intake port 9f.

[0064] An elastic plate 47 made of a thin metal sheet is provided between the fixed scroll 9 and the movable scroll 11 and the pivot housing 3. The movable scroll 11 is biased toward the fixed scroll 9 by the restoring force when the elastic plate 47 is elastically deformed.

[0065] The movable substrate 11a and the elastic plate 47 form a back pressure chamber 49 within the boss 3a of the support housing 3. The back pressure chamber 49 is in communication with the air supply hole 11d.

[0066] In this compressor, the motor mechanism 7 is operated under the control of an inverter, causing the drive shaft 5 to rotate around the drive axis O, which in turn causes the movable scroll 11 to rotate. As a result, the refrigerant introduced into the motor chamber 17 from the intake port 15c is drawn into the compression chamber 45 through the first intake passage 3c, the second intake passage 9e, and the intake port 9f. The compression chamber 45 then compresses the refrigerant inside while reducing its volume due to the rotation of the movable scroll 11. Furthermore, the rotation of the movable scroll 11 causes a portion of the high-pressure refrigerant in the compression chamber 45 to flow into the back pressure chamber 49 through the air supply hole 11d, causing the back pressure chamber 49 to become high-pressure. Therefore, the pressure from the elastic plate 47 and the back pressure chamber 49 biases the movable scroll 11 towards the fixed scroll 9, and the compression chamber 45 is suitably sealed.

[0067] The high-pressure refrigerant compressed in the compression chamber 45 is discharged from the discharge port 9d into the discharge chamber 35, and then from the discharge chamber 35, it passes through the discharge passage 13e to the oil separation chamber 13c. This high-pressure refrigerant then flows through the inside of the separation cylinder 21, separating the lubricating oil in the oil separation chamber 13c, and is discharged from the discharge port 13f. The lubricating oil separated from the refrigerant flows through a filter and an oil supply passage (not shown) and is supplied to the sliding parts of the fixed scroll 9 and the movable scroll 11, etc.

[0068] In this compressor having the above configuration, the motor housing 15 and the compression housing 13 are fastened together by bolts 25. As a result, the head 25a of the bolt 25 comes into contact with the compression housing 13, electrically connecting the bolt 25 and the compression housing 13, and the male threaded portion 25c of the bolt 25 is screwed into the female threaded hole 15f of the motor housing 15, electrically connecting the bolt 25 and the motor housing 15. Thus, the motor housing 15 and the compression housing 13 are electrically connected via the bolts 25 and are at the same potential.

[0069] Furthermore, the press-fit portion 511 of the connecting pin 51 is press-fitted into the first pin hole 15g of the motor housing 15, and the protrusions 53 of each first contact portion 51b of the connecting pin 51 abut against the inner circumferential surface of the second pin hole 3h of the shaft support housing 3. As a result, the motor housing 15 and the shaft support housing 3 are electrically connected via the connecting pin 51 and are at the same potential.

[0070] In this way, the motor housing 15, the shaft support housing 3, and the compression housing 13 are at the same potential via the connecting pin 51 and the bolt 25.

[0071] Furthermore, in this compressor, when disassembling the housing 1 for maintenance or other reasons, the first step is to remove the bolts 25 fastening the compression housing 13 and the motor housing 15. Then, the compression housing 13 is removed from the motor housing 15 and the shaft support housing 3. At this time, the outer diameter d of the second insertion portion 513 of the connecting pin 51 is smaller than the inner diameter of the third pin hole 13h of the compression housing 13, and the second insertion portion 513 and the inner circumferential surface of the third pin hole 13h do not come into contact, so the second insertion portion 513 can be easily removed from the third pin hole 13h. In other words, the connecting pin 51 does not interfere with the removal of the compression housing 13.

[0072] Next, the shaft support housing 3 is removed from the motor housing 15. The diameter D of the circumscribed circle C of each first contact portion 51b in the first insertion portion 512 of the connecting pin 51 is equal to the inner diameter of the second pin hole 3h, and the first insertion portion 512 can be inserted into and removed from the second pin hole 3h. Therefore, the first insertion portion 512 does not press against the inner circumferential surface of the second pin hole 3h by elastic force, and the connecting pin 51 does not interfere with the removal of the shaft support housing 3. Also, at this time, since the press-fit portion 511 of the connecting pin 51 is fixed by press-fitting into the first pin hole 15g of the motor housing 15, the connecting pin 51 does not fall out of the motor housing 15.

[0073] In this way, the compression housing 13 and the shaft support housing 3 can be easily removed from the motor housing 15.

[0074] Therefore, this compressor can achieve equipotentialization of housing 1 while maintaining the ease of disassembly of housing 1.

[0075] In particular, in this compressor, when assembling the shaft support housing 3 and the compression housing 13 to the motor housing 15, each connecting pin 51 functions suitably as a positioning pin. That is, when assembling the housing 1, as shown in Figure 6, each connecting pin 51 is first press-fitted into the first pin hole 15g of the motor housing 15. This ensures good concentricity between the connecting pin 51 and the first pin hole 15g, while fixing the connecting pin 51 to the first pin hole 15g with a large holding force. As a result, the positional accuracy and orientation of each connecting pin 51 relative to the motor housing 15 are stabilized. Consequently, the assembly of the shaft support housing 3 and the compression housing 13 to the motor housing 15 can be performed accurately and easily, improving the ease of assembly of the housing 1.

[0076] Furthermore, the first contact portion 51b of the connecting pin 51 has a groove 52 and a pair of protrusions 53. Therefore, the first contact portion 51b can be easily formed by press working.

[0077] Furthermore, in the connecting pin 51, three first contact portions 51b are provided at equal intervals in the circumferential direction of the outer surface 51a. Therefore, the first contact portions 51b reliably contact the inner surface of the second pin hole 3h of the support housing 3, thus ensuring a reliable electrical connection between the support housing 3 and the connecting pin 51. Additionally, the centers of the circumscribed circles C of each first contact portion 51b and the centers of the second pin hole 3h are more likely to coincide, improving the positioning accuracy when positioning the support housing 3 relative to the motor housing 15. to This will be advantageous.

[0078] (Example 2) As shown in Figure 8, the compressor of Example 2 has a modified configuration of the bolts 25 and connecting pins 51 compared to the compressor of Example 1.

[0079] The bolt 26 in the compressor of Example 2 is made of resin and has insulating properties. Like the bolt 25, the bolt 26 has a head 26a, a shaft portion 26b, and a male threaded portion 26c.

[0080] Furthermore, the connecting pin 55 in this compressor, like the connecting pin 51, is made of metal and has a cylindrical outer surface 55a with an outer diameter d. The connecting pin 55 has a press-fit portion 551, a first insertion portion 552, and a second insertion portion 553, which are arranged in this order from one end to the other in the longitudinal direction.

[0081] The press-fit portion 551 is formed in the region of one end of the connecting pin 55 in the longitudinal direction as a so-called straight portion extending in the longitudinal direction with a constant outer diameter d.

[0082] The first insertion part 552 is a connecting pin 55 It is formed in the central region in the longitudinal direction. Three first contact portions 55b are formed on the outer circumferential surface 55a of the first insertion portion 552, projecting radially outward from the outer circumferential surface 55a. The three first contact portions 55b are arranged at equal intervals of 120 degrees in the circumferential direction of the outer circumferential surface 55a.

[0083] The second insertion part 553 is a connecting pin 55 It is formed in the region of the other end in the longitudinal direction. Three second contact portions 55c are formed on the outer circumferential surface 55a of the second insertion portion 553, projecting radially outward from the outer circumferential surface 55a. The three second contact portions 55c are arranged at equal intervals of 120 degrees in the circumferential direction of the outer circumferential surface 55a.

[0084] Each first contact portion 55b and each second contact portion 55c has a groove and a pair of protrusions, similar to the first contact portion 51b in the compressor of Embodiment 1. The diameter D of the circumscribed circle C of each second contact portion 55c is equal to or less than the diameter D of the circumscribed circle C of each first contact portion 55b.

[0085] Similar to the compressor in Embodiment 1, the motor housing 15 has six female threaded holes 15f into which the male threaded portion 26c of the bolt 26 is screwed, and two first pin holes 15g into which the press-fit portion 551 of the connecting pin 55 is press-fitted.

[0086] The support housing 3, similar to the compressor in Embodiment 1, has a first bolt insertion hole 3g through which the shaft portion 26b of the bolt 26 is inserted, and two second pin holes 3h through which each first contact portion 55b of the first insertion portion 552 of the connecting pin 55 abuts. Each second pin hole 3h has a circular cross-section and an inner diameter equal to the diameter D of the circumscribed circle C of each first contact portion 55b of the first insertion portion 552. This allows the first insertion portion 552 and the second insertion portion 553 to be inserted into and removed from the second pin holes 3h.

[0087] The compression housing 13, like the compressor in Embodiment 1, has a second bolt insertion hole 13g through which the shaft portion 26b of the bolt 26 is inserted, and two third pin holes 13h through which each second contact portion 55c of the second insertion portion 553 of the connecting pin 55 abuts. Each third pin hole 13h has a circular cross-section and an inner diameter equal to the diameter D of the circumscribed circle C of each second contact portion 55c of the second insertion portion 553. This allows the second insertion portion 553 to be inserted into and removed from the third pin holes 13h.

[0088] In the compressor of Example 2, the bolts 26 that fasten the motor housing 15 and the compression housing 13 are insulating. Therefore, the motor housing 15 and the compression housing 13 cannot be electrically connected by the bolts 26.

[0089] In this compressor, each second contact portion 55c of the second insertion portion 553 of the connecting pin 55 abuts against the inner circumferential surface of each third pin hole 13h of the compression housing 13. Also, similar to the connecting pin 51 in the compressor of Embodiment 1, the press-fit portion 551 of the connecting pin 55 is press-fitted into the first pin hole 15g of the motor housing 15, and each first contact portion 55b of the first insertion portion 552 of the connecting pin 55 abuts against the inner circumferential surface of the second pin hole 3h of the shaft support housing 3. As a result, the motor housing 15, the shaft support housing 3, and the compression housing 13 are electrically connected via the connecting pin 55.

[0090] Furthermore, the inner diameter of the second pin hole 3h of the pivot housing 3 is equal to the diameter D of the circumscribed circle C of each first contact portion 55b of the connecting pin 55, and is equal to or greater than the diameter D of the circumscribed circle C of each second contact portion 55c of the connecting pin 55. For this reason, the first insertion portion 552 and the second insertion portion 553 of the connecting pin 55 can be inserted into and removed from the second pin hole 3h of the pivot housing 3.

[0091] Furthermore, the inner diameter of the third pin hole 13h of the compression housing 13 is equal to the diameter D of the circumscribed circle C of each second contact portion 55c of the connecting pin 55. Therefore, the second insertion portion 553 of the connecting pin 55 can be inserted into and removed from the third pin hole 13h of the compression housing 13.

[0092] Therefore, the shaft support housing 3 and the compression housing 13 can be easily removed from the motor housing 15.

[0093] The other configurations and effects of the compressor in Example 2 are the same as those of the compressor in Example 1.

[0094] Although the present invention has been described above in reference to Examples 1 and 2, it goes without saying that the present invention is not limited to Examples 1 and 2, and can be applied with appropriate modifications without departing from its spirit.

[0095] In the compressors of Examples 1 and 2, the diameter of the circumscribed circle of the first contact portion and the inner diameter of the second pin hole are made equal, or the diameter of the circumscribed circle of the second contact portion and the inner diameter of the third pin hole are made equal, but the present invention is not limited thereto. For example, the diameter of the circumscribed circle of the first contact portion (or second contact portion) and the inner diameter of the second pin hole (or third pin hole) are approximately equal, and the second pin hole ( Alternatively, the first contact portion (or the second contact portion) may be lightly press-fitted into the third pin hole with a small press-fit allowance that does not hinder insertion or removal.

[0096] In the compressors of Examples 1 and 2, the first housing section is the motor housing 15, the second housing section is the shaft support housing 3, and the third housing section is the compression section housing 13. However, the present invention is not limited thereto, and the number and types of the first housing section, second housing section, third housing section, etc. that constitute the housing are not particularly limited, as long as it is a housing that accommodates the compression mechanism and the motor mechanism.

[0097] For example, the first housing section may be the compression housing 13, the second housing section the shaft support housing 3, and the third housing section the motor housing 15.

[0098] Furthermore, the present invention may also be applied to a compressor that does not have a third housing portion, such that the housing comprises a motor housing 15, a compression section housing 13, and a first gasket 61 interposed between the motor housing 15 and the compression section housing 13, and the motor housing 15 and the compression section housing 13 are fastened together by an insulating fastening member. In this case, a connecting pin is used, which consists of a press-fit portion formed on one end in the longitudinal direction and a first insertion portion having a first contact portion formed on the other end in the longitudinal direction. The press-fit portion is pressed into the first pin hole 15g of the motor housing 15, and the first insertion portion is inserted so as to be removable while the first contact portion contacts the third pin hole 13h of the compression section housing 13.

[0099] Furthermore, the present invention may be applied to a compressor in which a metal fourth housing portion is disposed between the compression housing 13 and the compressor of Example 2, with a third gasket in between. In this case, a third bolt insertion hole is provided through the fourth housing portion through which the shaft portion 25b of a metal bolt 25 is inserted, and the fourth housing portion and the motor housing 15 are fastened together with the metal bolt 25 instead of the insulating bolt 26, thereby making the fourth housing portion and the motor housing 15 at the same potential.

[0100] In the compressors of Example 1 and Example 2, the number of connecting pins 51 and 55 is set to two, but the present invention is not limited to this, and the number of connecting pins may be one, three or more.

[0101] In the compressors of Examples 1 and 2, the first and second contact portions have a shape having a groove 52 and a pair of protrusions 53, but are not limited to this. The shape of the first and second contact portions is not limited to those that protrude radially outward from the outer circumferential surface of the first and second contact portions and can contact the inner circumferential surface of the second and third pin holes. For example, the first and second contact portions may be formed by simple protrusions without grooves.

[0102] In the compressors of Examples 1 and 2, the number of first and second contact points is set to three, but the number of first and second contact points is not particularly limited and may be one, two, or four or more.

[0103] In the compressors of Examples 1 and 2, a scroll type is used as the compression mechanism, but other types of compression mechanisms such as vane type or swashplate type may also be used.

[0104] The following technical concepts can also be understood from this specification. (Note 1) In an electric compressor in which a compression mechanism and a motor mechanism are housed within a housing, The housing comprises a first housing portion made of metal having a first joining surface and a first pin hole formed on the first joining surface, A second metal housing portion having a second joining surface facing the first joining surface and a second pin hole formed on the second joining surface at a position facing the first pin hole, A metal connecting pin having a press-fit portion that is press-fitted into the first pin hole, and a first insertion portion that is inserted into the second pin hole so as to be removable, with the first contact portion that abuts against the inner circumferential surface of the second pin hole protruding from the outer circumferential surface, An electric compressor characterized by comprising: an insulating first gasket interposed between the first joint surface and the second joint surface, having a first pin insertion hole through which the connecting pin is inserted.

[0105] (Note 2) The equipped 2 pin hole penetrates the equipped 2 housing portion, The second housing portion has a third joining surface facing the opposite side of the second joining surface, The housing comprises a metal third housing portion having a fourth joining surface facing the third joining surface and a third pin hole formed on the fourth joining surface at a position facing the second pin hole, An insulating second gasket interposed between the third joint surface and the fourth joint surface, having a second pin insertion hole through which the connecting pin is inserted, The present invention further comprises a metal fastening member that fastens the first housing portion and the third housing portion with the second housing portion in between, The connecting pin further has a second insertion portion located on the opposite side of the press-fit portion from the first insertion portion in the longitudinal direction of the connecting pin, The electric compressor as described in Appendix 1, wherein the outer diameter of the second insertion portion is smaller than the inner diameter of the third pin hole.

[0106] (Note 3) The equipped 2 pin hole penetrates the equipped 2 housing portion, The second housing portion has a third joining surface facing the opposite side of the second joining surface, The housing comprises a metal third housing portion having a fourth joining surface facing the third joining surface and a third pin hole formed on the fourth joining surface at a position facing the second pin hole, The present invention further comprises an insulating second gasket interposed between the third joint surface and the fourth joint surface, having a second pin insertion hole through which the connecting pin is inserted, The connecting pin has a second insertion portion that is positioned in the longitudinal direction of the connecting pin on the opposite side of the press-fit portion from the first insertion portion. moreover Yes, The electric compressor according to Appendix 1, wherein the second insertion portion has a second contact portion that protrudes from the outer circumferential surface of the second insertion portion and abuts against the inner circumferential surface of the third pin hole, and is inserted into the third pin hole so as to be removable. (Note 4) The electric compressor according to any one of the appendices 1 to 3, wherein the first contact portion has a groove recessed on the outer circumferential surface of the connecting pin and a pair of protrusions convex on the outer circumferential surface and arranged in the circumferential direction of the connecting pin with the groove in between.

[0107] (Note 5) The first contact portion is an electric compressor as described in any one of the multiple appendices 1 to 4.

[0108] ( Note 6) The electric compressor according to Appendix 5, wherein the plurality of first contact portions are arranged at equal intervals in the circumferential direction of the connecting pin. [Industrial applicability]

[0109] This invention can be used in air conditioning systems for vehicles and the like. [Explanation of Symbols]

[0110] 1… Housing 3…Axle support housing (second housing section) 3e…Front end surface (second joint surface) 3d...Rear end surface (third joint surface) 3h…Second pin hole 5…Drive shaft (compression mechanism) 7…Motor mechanism 9…Fixed scroll (compression mechanism) 11…Movable scroll (compression mechanism) 13…Compression section housing (third housing section) 13h...3rd pin hole 13i…Front end surface (4th joint surface) 15…Motor housing (first housing section) 15e...Rear end surface (first joint surface) 15g…1st pinhole 25…Bolt (fastening component) 61…Gasket No. 1 61b…First pin insertion hole 63…2nd gasket 63b...Second pin insertion hole 51, 55... Connecting pins 51a, 55a...outer surface 51b, 55b...first contact part 55c…Second contact part 511, 551... Press-fit section 512, 552... First insertion section 513, 553... Second insertion section 52… Groove 53… protrusion

Claims

1. In an electric compressor in which a compression mechanism and a motor mechanism are housed within a housing, The housing comprises a first housing portion made of metal having a first joining surface and a first pin hole formed on the first joining surface, A second metal housing portion having a second joining surface facing the first joining surface and a second pin hole formed on the second joining surface at a position facing the first pin hole, A metal connecting pin having a cylindrical outer surface, the connecting pin having a press-fit portion provided at one end of the connecting pin and press-fitted into the first pin hole, and a first insertion portion provided at the other end of the connecting pin from the press-fit portion, protruding radially outward from the outer surface, and having a first contact portion that abuts against the inner surface of the second pin hole when inserted into the second pin hole in a removable manner, The invention comprises an insulating first gasket interposed between the first joining surface and the second joining surface, having a first pin insertion hole through which the connecting pin is inserted, The outer diameter of the circumscribed circle that contacts the tip projection of the first contact portion is larger than the diameter of the press-fit portion. An electric compressor characterized in that the diameter of the second pin hole is larger than the diameter of the first pin hole.

2. The aforementioned second pin hole penetrates the aforementioned second housing portion, The second housing portion has a third joining surface facing the opposite side of the second joining surface, The housing comprises a third metal housing portion having a fourth joining surface facing the third joining surface and a third pin hole formed on the fourth joining surface at a position facing the second pin hole, An insulating second gasket interposed between the third joint surface and the fourth joint surface, having a second pin insertion hole through which the connecting pin is inserted, The present invention further comprises a metal fastening member that fastens the first housing portion and the third housing portion with the second housing portion in between, The connecting pin further has a second insertion portion located on the opposite side of the press-fit portion from the first insertion portion in the longitudinal direction of the connecting pin, The electric compressor according to claim 1, wherein the outer diameter of the second insertion portion is smaller than the inner diameter of the third pin hole.

3. The electric compressor according to claim 1 or 2, wherein the first contact portion has a groove recessed in the outer circumferential surface of the connecting pin and a pair of protrusions convex on the outer circumferential surface and arranged in the circumferential direction of the connecting pin with the groove in between.

4. The electric compressor according to claim 1 or 2, wherein the first contact portion is a plurality of portions.

5. The electric compressor according to claim 4, wherein the plurality of first contact portions are arranged at equal intervals in the circumferential direction of the connecting pin.

6. The aforementioned second pin hole penetrates the aforementioned second housing portion, The second housing portion has a third joining surface facing the opposite side of the second joining surface, The housing comprises a third metal housing portion having a fourth joining surface facing the third joining surface and a third pin hole formed on the fourth joining surface at a position facing the second pin hole, The present invention further comprises an insulating second gasket interposed between the third joint surface and the fourth joint surface, having a second pin insertion hole through which the connecting pin is inserted, The connecting pin further has a second insertion portion located on the opposite side of the press-fit portion from the first insertion portion in the longitudinal direction of the connecting pin, The electric compressor according to claim 1, wherein the second insertion portion has a second contact portion that protrudes from the outer circumferential surface of the second insertion portion and abuts against the inner circumferential surface of the third pin hole, and is inserted into the third pin hole so as to be removable.

7. An electric compressor in which a compression mechanism and a motor mechanism are housed within a housing, The housing comprises a first housing portion made of metal having a first joining surface and a first pin hole formed on the first joining surface, A second metal housing portion having a second joining surface facing the first joining surface and a second pin hole formed on the second joining surface at a position facing the first pin hole, A metal connecting pin having a press-fit portion that is press-fitted into the first pin hole, and a first insertion portion that protrudes from the outer surface and a first contact portion that abuts against the inner surface of the second pin hole, and is inserted into the second pin hole so as to be removable, The invention comprises an insulating first gasket interposed between the first joining surface and the second joining surface, having a first pin insertion hole through which the connecting pin is inserted, The aforementioned second pin hole penetrates the aforementioned second housing portion, The second housing portion has a third joining surface facing the opposite side of the second joining surface, The housing comprises a third metal housing portion having a fourth joining surface facing the third joining surface and a third pin hole formed on the fourth joining surface at a position facing the second pin hole, An insulating second gasket interposed between the third joint surface and the fourth joint surface, having a second pin insertion hole through which the connecting pin is inserted, The present invention further comprises a metal fastening member that fastens the first housing portion and the third housing portion with the second housing portion in between, The connecting pin further has a second insertion portion located on the opposite side of the press-fit portion from the first insertion portion in the longitudinal direction of the connecting pin, An electric compressor characterized in that the outer diameter of the second insertion portion is smaller than the inner diameter of the third pin hole.

8. The electric compressor according to claim 7, wherein the first contact portion has a groove recessed in the outer circumferential surface of the connecting pin and a pair of protrusions convex on the outer circumferential surface and arranged in the circumferential direction of the connecting pin with the groove in between.

9. The electric compressor according to claim 7 or 8, wherein the first contact portion is a plurality of portions.

10. The electric compressor according to claim 9, wherein the plurality of first contact portions are arranged at equal intervals in the circumferential direction of the connecting pin.

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