CN110323871B

CN110323871B - Electric compressor

Info

Publication number: CN110323871B
Application number: CN201910244234.3A
Authority: CN
Inventors: 大桥宽之; 安谷屋拓
Original assignee: Toyota Industries Corp
Current assignee: Toyota Industries Corp
Priority date: 2018-03-30
Filing date: 2019-03-28
Publication date: 2021-04-09
Anticipated expiration: 2039-03-28
Also published as: DE102019108073A1; KR20190114789A; CN110323871A; JP2019178664A; JP6977653B2; KR102262971B1

Abstract

Provided is an electric compressor capable of ensuring insulation and avoiding a connection terminal from falling off a cluster block. The electric compressor is provided with a connector (40) which is accommodated in the motor housing and connects the motor wiring (27) and the conductive member. The connector (40) is provided with a connection terminal (50) for electrically connecting the motor wiring (27) to the conductive member, and an insulating bundling block (60) for accommodating the connection terminal (50). The cluster block (60) is provided with a housing member (61) and a cover member (71), wherein the housing member has a terminal insertion hole (63) for inserting the connection terminal (50) and a conductive member insertion hole for inserting the conductive member. The cover member (71) has a cover portion (72) that closes off the opening of the terminal insertion hole (63) and an extension portion (74) that extends from the cover portion (72) toward the conductive member insertion hole. The extending portion (74) limits the contact of the connection terminal (50) to the opening of the terminal insertion hole (63).

Description

Electric compressor

Technical Field

The present invention relates to an electric compressor.

Background

For example, as disclosed in patent document 1, an electric compressor includes an electric motor, a compression unit driven by the electric motor, a housing accommodating the electric motor and the compression unit, a motor drive circuit for driving the electric motor, motor wiring led out from the electric motor, a conductive member electrically connected to the motor drive circuit, and a connector accommodated in the housing and connecting the motor wiring and the conductive member. The connector includes a connection terminal for electrically connecting the motor wiring to the conductive member, and an insulating cluster block (cluster block) for housing the connection terminal. The cluster block includes a terminal insertion hole into which the connection terminal is inserted and a conductive member insertion hole into which the conductive member is inserted. The connection terminal has a 1 st connection part electrically connected to the motor wiring and a 2 nd connection part electrically connected to the conductive member. When electric power is supplied from the motor drive circuit to the electric motor via the conductive member, the connection terminal, and the motor wiring, the electric motor is driven, the compression portion is driven, and the refrigerant is compressed by the compression portion.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open No. 2014-34918

Disclosure of Invention

Problems to be solved by the invention

Among the cluster blocks, there are cluster blocks in which claws are formed on an inner surface where the terminal insertion holes are formed. In the insertion direction of the connection terminal with respect to the terminal insertion hole, the claw is brought into contact with the 2 nd connecting portion, for example, so that the connection terminal inserted into the terminal insertion hole does not move toward the opening portion. This can prevent the connection terminal from moving toward the opening and falling off the cluster block. When such claws are formed integrally with the cluster block, holes communicating with the outside of the cluster block may be formed in the interior of the terminal insertion holes in order to form the claws in the cluster block. In such a case, for example, when the housing is filled with the liquid refrigerant containing oil before the operation of the electric compressor is started, the liquid refrigerant containing oil may enter the terminal insertion hole from the hole, and the connection terminal and the housing may be brought into a conduction state via the liquid refrigerant containing oil when the electric compressor is operated, and insulation between the connection terminal and the housing cannot be secured.

The present invention has been made to solve the above problems, and an object of the present invention is to provide an electric compressor capable of preventing a connection terminal from falling off a cluster block while ensuring insulation.

Means for solving the problems

An electric compressor for solving the above problems includes: an electric motor; a compression section driven by the electric motor; a housing that houses the electric motor and the compression unit; a motor drive circuit that drives the electric motor; a motor wiring led out from the electric motor; a conductive member electrically connected to the motor drive circuit; and a connector which is housed in the housing and connects the motor wiring and the conductive member, wherein the connector includes a connection terminal which electrically connects the motor wiring and the conductive member, and an insulating bundling block which houses the connection terminal, and the bundling block includes: a housing member having a terminal insertion hole into which the connection terminal is inserted and a conductive member insertion hole into which the conductive member is inserted; and a cover member having a cover portion that closes the opening of the terminal insertion hole and an extension portion that extends from the cover portion toward the conductive member insertion hole, the extension portion abutting and restricting movement of the connection terminal toward the opening of the terminal insertion hole.

The connection terminal may move toward the opening of the terminal insertion hole so as to interfere with the engagement between the conductive member and the connection terminal, but the movement of the connection terminal toward the opening of the terminal insertion hole is restricted by the extended portion of the cover member coming into contact with the connection terminal. Thus, the connection terminals can be prevented from falling off the cluster block. Thus, for example, unlike a cluster block having claws that restrict the movement of the connection terminal toward the opening portion on the inner surface of the cluster block where the terminal insertion hole is formed, holes that communicate with the outside of the cluster block inside the terminal insertion hole for forming the claws are not formed in the cluster block. Therefore, the problem that the liquid refrigerant containing oil enters into the terminal insertion hole from the hole for the forming claw can be solved. This ensures insulation between the connection terminals and the housing, and prevents the connection terminals from falling off the cluster block.

In the electric compressor, it is preferable that the cover portion has a motor wiring insertion portion through which the motor wiring is inserted, the connector further includes an insulating cover member that covers a 2 nd end surface of the cover portion opposite to a 1 st end surface that is an end surface from which the extended portion extends, and has a motor wiring passage portion through which the motor wiring is inserted, and a portion of the motor wiring passage portion overlaps with a portion of the motor wiring insertion portion when viewed from an insertion direction of the connection terminal with respect to the terminal insertion hole, and a portion of the motor wiring insertion portion is blocked by the cover member.

Thus, since a part of the motor wiring insertion portion is blocked by the cover member, the liquid refrigerant containing oil is less likely to enter the terminal insertion hole from the gap between the motor wiring insertion portion and the motor wiring, and the insulation between the connection terminal and the housing can be improved.

In the electric compressor, it is preferable that the cover member has a protruding portion protruding from the 2 nd end surface, the cover member has a protruding portion insertion hole through which the protruding portion is inserted, an inner peripheral surface of the terminal insertion hole surrounds an outer peripheral surface of the protruding portion, the motor wiring is inserted through the motor wiring passing portion between the inner peripheral surface of the terminal insertion hole and the outer peripheral surface of the protruding portion, and a resin is filled between the inner peripheral surface of the terminal insertion hole and the outer peripheral surface of the protruding portion.

Thus, since the resin is filled between the inner peripheral surface of the opening where the motor wiring passage portion is located and the outer peripheral surface of the protruding portion, the liquid refrigerant containing oil is less likely to enter the terminal insertion hole through the gap between the motor wiring passage portion and the motor wiring and the gap between the motor wiring insertion portion and the motor wiring. This can further improve the insulation between the connection terminal and the housing. Further, since the strength of the cover member is increased by the protruding portion, the cover member is less likely to be broken even if a load is applied to the cover member from the connection terminal.

In the electric compressor, it is preferable that the motor wiring insertion portion is a groove recessed in an outer peripheral surface of the cover portion, and the motor wiring passage portion is a groove recessed in an inner peripheral surface of the protruding portion insertion hole.

Thus, for example, compared to the case where the motor wiring insertion portion and the motor wiring passage portion are formed in a hole shape, it is easier to dispose the motor wiring at each of the motor wiring insertion portion and the motor wiring passage portion. This can shorten the time required to insert the motor wiring into the cover member and the cover member, and improve the productivity of the electric compressor.

In the electric compressor, it is preferable that the motor wiring insertion portion and the motor wiring passage portion are formed in a hole shape.

Thus, for example, compared to the case where the motor wiring insertion portion and the motor wiring passage portion are grooves, when a load from the motor wiring is applied to the motor wiring insertion portion and the motor wiring passage portion, cracks can be suppressed from entering the cover portion and the cover member of the cover member from the motor wiring insertion portion and the motor wiring passage portion.

In the electric compressor, it is preferable that the cover portion has a motor wiring insertion portion through which the motor wiring is inserted, the cover member has a protruding portion protruding from a 2 nd end surface of the cover portion opposite to a 1 st end surface that is an end surface from which the extended portion extends, the motor wiring is inserted through the motor wiring insertion portion between an inner peripheral surface of the terminal insertion hole and an outer peripheral surface of the protruding portion, and a resin is filled between the inner peripheral surface of the terminal insertion hole and the outer peripheral surface of the protruding portion.

Thus, since the resin is filled between the inner peripheral surface of the opening where the motor wiring passage portion is located and the outer peripheral surface of the protruding portion, the liquid refrigerant containing oil is less likely to enter the terminal insertion hole through the gap between the motor wiring insertion portion and the motor wiring. This can further improve the insulation between the connection terminal and the housing.

Effects of the invention

According to the present invention, it is possible to prevent the connection terminals from falling off the cluster block while ensuring insulation.

Drawings

Fig. 1 is a side sectional view of an electric compressor of the embodiment.

Fig. 2 is an exploded perspective view of the connector.

Fig. 3 is a cross-sectional view of the connector.

Fig. 4 is a front view showing the housing member and the cover member.

Fig. 5 is a front view showing the housing member, the cover member, and the cover member.

Fig. 6 is a perspective view of the connector.

Fig. 7 is a front view showing another example of the connector.

Detailed Description

Hereinafter, an embodiment embodying the electric compressor will be described with reference to fig. 1 to 6.

As shown in fig. 1, a casing 11 of the electric compressor 10 includes a motor casing 12 having a bottomed tubular shape with an opening 12a formed at one end (left end in fig. 1), and a discharge casing 13 having a bottomed tubular shape connected to one end of the motor casing 12. A bottomed cylindrical inverter cover 14 is attached to a bottom wall 121 of the motor case 12. A discharge chamber S1 is partitioned between the motor housing 12 and the discharge housing 13. A discharge port 15 is formed in a bottom wall of the discharge casing 13, and an external refrigerant circuit, not shown, is connected to the discharge port 15. A suction port, not shown, is formed in the peripheral wall 122 of the motor case 12, and an external refrigerant circuit is connected to the suction port.

A rotary shaft 16 is accommodated in the motor case 12. In the motor case 12, a compression unit 17 that compresses refrigerant and an electric motor 18 that drives the compression unit 17 are housed. The electric motor 18 drives the rotary shaft 16. The compression unit 17 is driven by the rotation of the rotary shaft 16. The electric motor 18 is disposed closer to a bottom wall 121 (right side in fig. 1) of the motor case 12 than the compression portion 17.

A shaft support member 19 is provided between the compression portion 17 and the electric motor 18 in the motor housing 12. An insertion hole 19a through which one end of the rotary shaft 16 is inserted is formed in the center of the shaft support member 19. A radial bearing 16a is provided between the insertion hole 19a and one end of the rotary shaft 16. One end portion of the rotary shaft 16 is rotatably supported by the shaft support member 19 via a radial bearing 16 a.

A bearing portion 121a is recessed in a bottom wall 121 of the motor housing 12. The other end of the rotation shaft 16 is inserted into the bearing 121 a. A radial bearing 16b is provided between the bearing portion 121a and the other end portion of the rotary shaft 16. The other end portion of the rotating shaft 16 is rotatably supported by the bearing portion 121a via a radial bearing 16 b.

The bottom wall 121 of the motor housing 12 and the inverter cover 14 define a storage space S2. In the housing space S2, a motor drive circuit 20 (indicated by a two-dot chain line in fig. 1) is mounted on an outer surface of the bottom wall 121. Thus, in the present embodiment, the compression unit 17, the electric motor 18, and the motor drive circuit 20 are arranged in this order along the extending direction (axial direction) of the axis L of the rotary shaft 16.

The compression portion 17 includes a fixed scroll 17a fixed in the motor case 12 and a movable scroll 17b disposed to face the fixed scroll 17 a. A compression chamber S3 whose volume can be changed is partitioned between the fixed scroll 17a and the movable scroll 17 b.

The electric motor 18 includes a rotor 21 (rotor) that rotates integrally with the rotary shaft 16, and a stator 22 (stator) that is fixed to the inner circumferential surface of the motor housing 12 so as to surround the rotor 21.

The rotor 21 has a rotor core 23 in a cylindrical shape, and the rotor core 23 is fixed to the rotating shaft 16. A plurality of permanent magnets 24 are embedded in the rotor core 23, and the permanent magnets 24 are arranged at equal intervals in the circumferential direction of the rotor core 23. The stator 22 includes an annular stator core 25 fixed to the inner peripheral surface of the motor case 12, and a coil 26 provided on the stator core 25.

A 1 st coil end 261 protrudes from one end face 251 of the stator core 25. A 2 nd coil end 262 protrudes from the other end face 252 of the stator core 25. The 1 st coil end 261 is located on the compression portion 17 side (one end side in the axial direction of the rotary shaft 16), and the 2 nd coil end 262 is located on the motor drive circuit 20 side (the other end side in the axial direction of the rotary shaft 16).

From the 1

st coil end

261, 2 motor wires 27 and phase wires 28 are led out corresponding to the U-phase, V-phase, and W-phase coils 26, respectively. Thus, the U-phase, V-phase, and W-phase coils 26 have a double-wire structure formed by winding 2 wires for achieving a low voltage. In fig. 1, for example, only 2 motor wires 27 of the U-phase and 2 phase lines 28 of the U-phase are shown. The motor wires 27 and the phase wires 28 are led out from the 1 st coil end 261 in a state where the lead wires of the coil 26 led out from the 1 st coil end 261 are covered with an insulating film (tube).

A through hole 121b is formed in the bottom wall 121 of the motor housing 12. The hermetic terminal 30 is disposed in the through hole 121 b. The airtight terminal 30 has 3 conductive members 31 (only 1 is illustrated in fig. 1) corresponding to the U-phase, V-phase, and W-phase coils 26. Each conductive member 31 is a cylindrical metal terminal linearly extending. Each conductive member 31 is inserted through the through hole 121b and has one end electrically connected to the motor drive circuit 20 via the cable 20 a. The other end of each conductive member 31 protrudes from the housing space S2 into the motor case 12 through the through hole 121 b. The hermetic terminal 30 includes 3 insulating members 32 (only 1 is shown in fig. 1) made of glass for insulating and fixing each conductive member 31 to the bottom wall 121.

A connector 40 is housed in the motor case 12. The connector 40 connects the motor wiring 27 and the conductive member 31. The connector 40 is disposed radially outward of the stator core 25 and the 2 nd coil end 262 with respect to the rotary shaft 16.

As shown in fig. 2, the connector 40 includes 3 connection terminals 50 corresponding to the U-phase, V-phase, and W-phase coils 26, and an insulating cluster block 60 that accommodates the 3 connection terminals 50.

Each of the connection terminals 50 has a 1 st connection portion 51 electrically connected to the motor wiring 27 and a 2 nd connection portion 52 electrically connected to the conductive member 31. The 1 st connecting portion 51 extends linearly. The 1 st connection portion 51 is connected to a portion where the insulating coating is removed and the lead of the coil 26 is exposed, which is an end portion of the motor wiring 27. Each connection terminal 50 has a pressing portion 53 for pressing each motor wiring 27. The pressing portion 53 is continuous with one end portion of the 1 st connecting portion 51. Each motor wiring 27 is mechanically connected to each connection terminal 50 by being pressed by the pressing portion 53.

The 2 nd connecting portion 52 is a substantially rectangular tube shape continuous with the other end portion of the 1 st connecting portion 51 and protruding from the other end portion of the 1 st connecting portion 51 in a direction orthogonal to the direction in which the 1 st connecting portion 51 extends. The axial direction of the 2 nd connecting part 52 coincides with the direction in which the 1 st connecting part 51 extends. The longitudinal direction of the 2 nd link 52 coincides with the projecting direction from the other end of the 1 st link 51.

The cluster block 60 includes a housing member 61 and a cover member 71 assembled to the housing member 61. The housing member 61 is a flat rectangular box shape.

As shown in fig. 3, the housing member 61 has 3 receiving portions 62. Each connection terminal 50 is inserted into each housing portion 62. Each receiving portion 62 is a rectangular hole. The longitudinal direction of each housing portion 62 coincides with the longitudinal direction of the 2 nd connection portion 52 of each connection terminal 50, and the lateral direction of each housing portion 62 coincides with the lateral direction of the 2 nd connection portion 52 of each connection terminal 50. The 3 accommodating portions 62 are arranged on a straight line in the short side direction of the accommodating portion 62. Thus, 3 connection terminals 50 inserted into the 3 receiving portions 62 are aligned in a straight line in the short side direction of the 2 nd connection portion 52 in the cluster block 60.

As shown in fig. 3, circular through holes 64 communicating with the receiving portions 62 are formed in the end wall 61a forming one surface of the housing member 61. Each through hole 64 is located inside the 2 nd connecting portion 52 of each connection terminal 50 when viewed from the axial direction of each through hole 64. As shown in fig. 2, 3 cylindrical guide portions 65 protrude from the outer surface of the end wall 61a of the housing member 61. The inner side of each guide portion 65 communicates with each through hole 64. The axial center of each guide portion 65 coincides with the axial center of each through hole 64.

The other end of each conductive member 31 is inserted into the inside of the 2 nd connecting portion 52 of each connection terminal 50 through the inside of each guide portion 65 and each through hole 64. Thereby, each conductive member 31 is electrically connected to each connection terminal 50. Therefore, as shown in fig. 3, the inner side of each guide portion 65 and each through hole 64 constitute a conductive member insertion hole 66 into which each conductive member 31 is inserted. Thereby, the housing member 61 has the conductive member insertion hole 66.

One flat surface of a pair of flat surfaces forming the outer surface of the housing member 61 is a curved surface 61b curved concavely toward the inside of the housing member 61. The curved surface 61b is a surface extending along the outer peripheral surface of the stator core 25. The connector 40 of the present embodiment is disposed in the motor case 12 such that the curved surface 61b is along the outer peripheral surface of the stator core 25. The housing member 61 engages with the stator 22.

As shown in fig. 2, the cover member 71 has a rectangular plate-shaped cover portion 72. The outer peripheral surface 72a of the cover 72 extends along the inner peripheral surface 63a of the terminal insertion hole 63.

As shown in fig. 4, the cover member 71 closes the terminal insertion hole 63 by fitting the cover portion 72 into the inner peripheral surface 63a of the terminal insertion hole 63. The cover 72 has 6 motor wiring insertion portions 73. Each motor wiring insertion portion 73 is a groove recessed in the outer peripheral surface 72a of the cover 72. The 6 motor wiring insertion portions 73 are arranged in a straight line in the longitudinal direction of the cover 72.

As shown in fig. 2, the housing member 61 has a terminal insertion hole 63 into which the 3 connection terminals 50 can be inserted into the housing member 61. The terminal insertion holes 63 are rectangular holes communicating with the 3 receiving portions 62. The longitudinal direction of the terminal insertion hole 63 coincides with the lateral direction of each receiving portion 62, and the lateral direction of the terminal insertion hole 63 coincides with the longitudinal direction of each receiving portion 62. The terminal insertion hole 63 is opened at one face of the housing member 61. Each connection terminal 50 is inserted from the terminal insertion hole 63 into the housing member 61 so that the 1 st connection portion 51 is located on the terminal insertion hole 63 side of the 2 nd connection portion 52, and is accommodated in each accommodation portion 62.

Each motor wiring insertion portion 73 is formed by cutting one of a pair of outer surfaces 721a along the longitudinal direction of the cover portion 72 out of the outer peripheral surface 72a of the cover portion 72. Thus, each motor wiring insertion portion 73 is positioned on one side in the short direction of the cover 72. As shown in fig. 2, each motor wiring insertion portion 73 penetrates the cover portion 72 in the thickness direction. The motor wiring insertion portions 73 are inserted as end portions of the motor wirings 27, and portions where the insulating coatings are removed and the lead wires of the coils 26 are exposed.

As shown in fig. 2, the cover member 71 has 3 extensions 74. Each of the extending portions 74 is a square column shape extending from the 1 st end surface 72b, which is an end surface of the cover portion 72 close to the housing portion 62, toward each of the housing portions 62. The 3 extending portions 74 are aligned in a straight line in the longitudinal direction of the cover portion 72. Each of the extending portions 74 is separated from one of the short side directions of the lid portion 72. Thus, the extending portions 74 are located at positions shifted from the motor wiring insertion portions 73 in the short side direction of the cover 72. Each of the extensions 74 becomes tapered as it goes away from the lid portion 72. The extending portions 74 are inserted from the terminal insertion hole 63 side into the receiving portions 62. Each of the extending portions 74 extends toward the 2 nd connecting portion 52 of each of the connection terminals 50. The tip 74a of each extending portion 74 faces the 2 nd connecting portion 52 of each connecting terminal 50 in the direction extending from the 1 st end surface 72b of the cover portion 72. When each conductive member 31 is inserted into each conductive member insertion hole 66, even if the connection terminal 50 is pushed by the conductive member 31 and moves, the movement is restricted by the contact of each extending portion 74 with each connection terminal 50, and each conductive member 31 is inserted into the inside of the 2 nd connection portion 52 of each connection terminal 50. In addition, even if the conductive member 31 moves toward the opening of the terminal insertion hole 63 in a state where the conductive member 31 is inserted into the 2 nd connection portion 52 of the connection terminal 50, the extension portions 74 come into contact with the connection terminals 50, and the conductive member 31 can be prevented from coming off the 2 nd connection portion 52. In the present embodiment, the tip 74a of each extending portion 74 faces the 2 nd connecting portion 52 in a state of contacting the 2 nd connecting portion 52 of each connecting terminal 50 in a direction extending from the 1 st end surface 72b of the cover portion 72, but the tip 74a of each extending portion 74 may face the 2 nd connecting portion 52 in a state of being spaced apart from the 2 nd connecting portion 52 of each connecting terminal 50 in a direction extending from the 1 st end surface 72b of the cover portion 72.

The cover member 71 has a protruding portion 75 protruding from a 2 nd end surface 72c of the cover portion 72 on the opposite side of the 1 st end surface 72b from which the extending portions 74 extend. The protruding portion 75 is entirely separated from the outer peripheral surface 72a of the cover 72. The projection 75 is a rectangular prism. The longitudinal direction of the protrusion 75 coincides with the longitudinal direction of the lid 72, and the lateral direction of the protrusion 75 coincides with the lateral direction of the lid 72.

The connector 40 further includes an insulating cover member 80. The cover member 80 is a rectangular plate shape formed with a protrusion insertion hole 81. The protrusion insertion hole 81 penetrates the cover member 80 in the thickness direction. The protrusion 75 is inserted into the protrusion insertion hole 81. The cover member 80 of the present embodiment is made of rubber. The dimension of the cover member 80 in the thickness direction is about half of the amount of projection of the projection 75 from the 2 nd end surface 72c of the cover 72. The protrusion insertion hole 81 is in the shape of a long square hole. The longitudinal direction of the protrusion insertion hole 81 coincides with the longitudinal direction of the cover member 80, and the lateral direction of the protrusion insertion hole 81 coincides with the lateral direction of the cover member 80. The dimension in the longitudinal direction of the protrusion insertion hole 81 is substantially the same as the dimension in the longitudinal direction of the protrusion 75, and the dimension in the transverse direction of the protrusion insertion hole 81 is substantially the same as the dimension in the transverse direction of the protrusion 75.

The cover member 80 has an outer shape conforming to the outer shape of the cover portion 72. The cover member 80 covers the 2 nd end surface 72c of the cover portion 72. The lid 72 and the cover member 80 are press-fitted into the terminal insertion hole 63. The cover member 71 is assembled to the housing member 61 by press-fitting the cover 72 and the cover member 80 into the terminal insertion hole 63.

As shown in fig. 5, the cover member 80 has 6 motor wiring passing portions 82. The 6 motor wiring passing portions 82 are grooves recessed in the inner peripheral surface 81a of the protrusion insertion hole 81. The 6 motor wiring passage portions 82 are arranged on a straight line in the longitudinal direction of the cover member 80. Each motor wiring passage 82 is formed by cutting one inner surface 811a of a pair of inner surfaces along the longitudinal direction of the protruding portion insertion hole 81 in the inner peripheral surface 81a of the protruding portion insertion hole 81. Thus, each motor wiring passage portion 82 is positioned on one side in the short direction of the cover member 80. Each motor wiring passage 82 penetrates the cover member 80 in the thickness direction. The portions that are the end portions of the motor wires 27 and from which the insulating coating is removed and the leads of the coil 26 are exposed are inserted into the motor wire passage portions 82.

When viewed from the insertion direction of the connection terminal 50 into the housing portion 62, a part of each motor wiring passage portion 82 overlaps a part of each motor wiring insertion portion 73. The motor wires 27 are inserted through a part of the motor wire passage portions 82 and a part of the motor wire insertion portions 73 that overlap each other when viewed from the insertion direction of the connection terminal 50. In addition, when viewed from the insertion direction of the connection terminal 50 into the housing portion 62, a part of each motor wiring insertion portion 73 is blocked by the cover member 80.

The inner peripheral surface 63a of the terminal insertion hole 63 surrounds the outer peripheral surface 75a of the protruding portion 75. Each motor wiring passing portion 82 is located between the inner peripheral surface 63a of the terminal insertion hole 63 and the outer peripheral surface 75a of the protruding portion 75.

The cover member 80 is formed with a circular-hole-shaped phase harness insertion portion 83 into which the phase harness 29 bundled with the phase wires 28 corresponding to the U-phase, V-phase, and W-phase coils 26 is inserted. The phase harness insertion portion 83 penetrates the cover member 80 in the thickness direction. The phase harness insertion portion 83 is located between the inner peripheral surface 63a of the terminal insertion hole 63 and the outer peripheral surface 75a of the protruding portion 75.

As shown in fig. 4, a round-hole-shaped phase harness insertion recess 76 into which the connection portion 29a (neutral point) of the phase harness 29 is inserted is formed in the 2 nd end surface 72c of the cover 72. The phase harness insertion recess 76 communicates with the phase harness insertion portion 83.

As shown in fig. 6, a resin 90 is filled between the inner peripheral surface 63a of the terminal insertion hole 63 and the outer peripheral surface 75a of the protruding portion 75. The resin 90 is, for example, an adhesive. The space between the inner peripheral surface 63a of the terminal insertion hole 63 and the outer peripheral surface 75a of the protruding portion 75 is sealed with the resin 90, and the inner peripheral surface 63a of the terminal insertion hole 63 and the outer peripheral surface 75a of the protruding portion 75 are bonded to each other through the resin 90.

In the electric compressor 10 having the above-described configuration, when electric power is supplied from the motor drive circuit 20 to the electric motor 18 via the cables 20a, the conductive members 31, the connection terminals 50, and the motor wires 27, the electric motor 18 is driven, and the compression unit 17 is driven and the refrigerant is compressed by the compression unit 17 by the rotation of the rotary shaft 16 in accordance with the driving of the electric motor 18.

Next, the effects of the present embodiment will be described together with the effects.

(1) Each connection terminal 50 may move toward the opening of the terminal insertion hole 63 so as to interfere with the joining of each conductive member 31 and each connection terminal 50. In contrast, in the present embodiment, the movement of the connection terminal 50 toward the opening of the terminal insertion hole 63 is restricted by the tip portion 74a of each extending portion 74 of the cover member 71 coming into contact with the 2 nd connecting portion 52 of each connection terminal 50. Therefore, the connection terminals 50 can be prevented from falling off from the cluster block 60. Thus, for example, no hole communicating with the outside of the cluster block is formed in the terminal insertion hole in the cluster block so that the claw is formed on the inner surface of the cluster block where the terminal insertion hole is formed, like a cluster block having a claw for restricting the movement of the connection terminal toward the opening. Therefore, for example, a problem that the liquid refrigerant containing oil filled in the motor housing 12 enters the receiving portion 62 through the hole for the forming claw before the operation of the electric compressor 10 is started can be solved. Therefore, the connection terminals 50 and the motor case 12 (case 11) can be prevented from being brought into a conductive state by the liquid refrigerant containing oil. This ensures insulation between the connection terminals 50 and the housing 11, and prevents the connection terminals 50 from falling off the cluster block 60.

(2) Since a part of each motor wiring insertion portion 73 is blocked by the cover member 80, the liquid refrigerant containing oil is less likely to enter each housing portion 62 from the gap between each motor wiring insertion portion 73 and each motor wiring 27, and the insulation between each connection terminal 50 and the housing 11 can be improved.

(3) Since the resin 90 is filled between the inner peripheral surface 63a of the terminal insertion hole 63 where each motor wiring passage portion 82 is located and the outer peripheral surface 75a of the protrusion portion 75, the liquid refrigerant containing oil is less likely to enter each of the receiving portions 62 through the gap between each motor wiring passage portion 82 and each motor wiring 27 and the gap between each motor wiring insertion portion 73 and each motor wiring 27. This can further improve the insulation between each connection terminal 50 and the housing 11. Further, since the strength of the lid member 71 is increased by the protruding portion 75, the lid member 71 is less likely to be broken even if a load is applied to the lid member 71 from each connection terminal 50.

(4) Each motor wiring insertion portion 73 is a groove recessed in the outer peripheral surface 72a of the lid portion 72, and each motor wiring passage portion 82 is a groove recessed in the inner peripheral surface 81a of the protrusion insertion hole 81. Thus, for example, compared to the case where each motor wiring insertion portion 73 and each motor wiring passage portion 82 are in the hole shape, it is easier to dispose each motor wiring 27 in each motor wiring insertion portion 73 and each motor wiring passage portion 82. This can shorten the time required to insert each motor wiring 27 into the cover member 71 and the cover member 80, and improve the productivity of the electric compressor 10.

(5) Since each motor wiring insertion portion 73 is partially blocked by the cover member 80, the resin 90 filled between the inner peripheral surface 63a of the terminal insertion hole 63 and the outer peripheral surface 75a of the protrusion 75 is less likely to enter each housing portion 62 through the gap between each motor wiring insertion portion 73 and each motor wiring 27. This can prevent the resin 90 from entering the housing portions 62 and prevent the resin 90 from adhering to the connection terminals 50. As a result, the resin 90 attached to each connection terminal 50 can be prevented from becoming foreign matter and causing a connection failure between each conductive member 31 and the 2 nd connection portion 52.

The above embodiment may be modified as follows.

In the cluster block 60, the connection terminals 50 may not be arranged in a straight line in the short side direction of the 2 nd connection part 52, and the arrangement of the connection terminals 50 in the cluster block 60 may be appropriately changed.

In the

case member

61, 3 receiving portions 62 may be 1 space which is not divided. In this case, the housing portion 62 is integrated with the

terminal insertion hole

63, and 3 connection terminals 50 are housed in a space where the housing portion 62 and the terminal insertion hole 63 are integrated.

The cover member 71 may be a structure in which the protrusion 75 is omitted.

The conductive member insertion hole 66 may be formed in the other flat surface of the pair of flat surfaces forming the outer surface of the outer shell member 61, which is opposite to the curved surface 61 b. The axial direction of the 2 nd connecting part 52 may be orthogonal to the direction in which the 1 st connecting part 51 extends. The longitudinal direction of the 2 nd link 52 coincides with the direction in which the 1 st link 51 extends. In this case, the insertion direction of the conductive member 31 with respect to the 2 nd connection part 52 of the connection terminal 50 is orthogonal to the direction in which the 1 st connection part 51 extends.

The o-connector 40 may be a structure in which the cover member 80 is omitted. In a configuration in which the cover member 80 is omitted, the resin 90 may be filled between the inner peripheral surface 63a of the terminal insertion hole 63 and the outer peripheral surface 75a of the protruding portion 75. In this case, the liquid refrigerant containing oil is less likely to enter the housing portions 62 through the gaps between the motor wiring insertion portions 73 and the motor wirings 27. This can further improve the insulation between each connection terminal 50 and the housing 11.

The o-cover member 80 may be made of a resin, for example, instead of rubber, as long as it is made of an insulating material.

The resin 90 may not be filled between the inner peripheral surface 63a of the terminal insertion hole 63 and the outer peripheral surface 75a of the protruding portion 75.

The method of assembling the housing member 61 and the cover member 71 is not limited to press fitting. For example, the housing member 61 and the cover member 71 may be assembled by engaging claw portions formed in the cover portion 72 of the cover member 71 with hole portions formed in the inner peripheral surface 63a of the terminal insertion hole 63 of the housing member 61.

The harness insertion recesses 76 of the cover member 71 and the harness insertion portions 83 of the cover member 80 may be omitted. In this case, an insulating cap is attached to the junction connecting portion 29a of the phase harness 29.

The shape of each motor wiring insertion portion 73 and the shape of each motor wiring passage portion 82 are not limited to the groove, and may be appropriately changed.

For example, as shown in fig. 7, each motor wiring insertion portion 73 may be a hole that penetrates the cover portion 72 in the thickness direction. Each motor wiring passage 82 may be a hole penetrating the cover member 80 in the thickness direction. In the embodiment shown in fig. 7, each motor wiring insertion portion 73 and each motor wiring passage portion 82 have a circular hole shape. When viewed from the insertion direction of the connection terminal 50 into the housing portion 62, a part of each motor wiring passage portion 82 overlaps a part of each motor wiring insertion portion 73, and a part of each motor wiring insertion portion 73 is blocked by the cover member 80.

Thus, for example, compared to the case where the motor wiring insertion portions 73 and the motor wiring passage portions 82 are grooves, when a load from the motor wirings 27 is applied to the motor wiring insertion portions 73 and the motor wiring passage portions 82, cracks can be suppressed from entering the cover portion 72 and the cover member 80 of the cover member 71 from the motor wiring insertion portions 73 and the motor wiring passage portions 82. In the embodiment shown in fig. 7, each motor wiring insertion portion 73 and each motor wiring passage portion 82 may have a square hole shape, for example.

Although not shown, when the cover member 80 is made of an elastically deformable material, each motor wiring passage 82 may be formed by notching the inner circumferential surface 81a where the protrusion insertion hole 81 is formed.

In the

cover member

71, 2 motor wires 27 may be inserted into 1 motor wire insertion portion 73.

In the

cover member

80, 2 motor wires 27 may be inserted into 1 motor wire passage portion 82.

The number of phases of the coil 26 may be changed.

The number of wires forming the coil 26 may be 1, or 3 or more.

The number of motor wire insertion portions 73 of the cover member 71 may be appropriately changed depending on the number of phases of the coils 26 and the number of lead wires forming the coils 26.

The number of the extension portions 74 of the cover member 71 may also be changed according to the number of phases of the coil 26.

The number of receiving portions 62 of the housing member 61 may be changed according to the number of phases of the coil 26.

The number of the conductive member insertion holes 66 of the housing member 61 may also be changed according to the number of phases of the coil 26.

The number of motor wiring passing portions 82 of the cover member 80 may be appropriately changed depending on the number of phases of the coils 26 and the number of lead wires forming the coils 26.

The tip 74a of each extension 74 of the cover member 71 may face, for example, the 1 st connection portion 51 of each connection terminal 50 in a direction extending from the 1 st end surface 72b of the cover 72. In short, the distal end 74a of each extending portion 74 of the cover member 71 may face at least a part of each connection terminal 50 in a direction extending from the 1 st end surface 72b of the cover portion 72.

Each extension portion 74 of the cover member 71 may abut and restrict the movement of the connection terminal 50 toward the terminal insertion hole 63 by a portion other than the tip portion 74 a.

Each motor wiring 27 may be inserted into each motor wiring insertion portion 73 at a portion where the lead wire of the coil 26 is covered with the insulating film.

Each motor wire 27 may be inserted into each motor wire passage portion 82 at a portion where the lead wire of the coil 26 is covered with an insulating coating.

The 2 motor wires 27 of each phase may be covered with an insulating pipe member. The motor wiring 27 may be inserted through a part of each motor wiring passage 82 and a part of each motor wiring insertion portion 73 that overlap each other when viewed from the insertion direction of the connection terminal 50 in a state of being covered with the pipe member.

The compression portion 17 is not limited to the type of the fixed scroll 17a and the movable scroll 17b, and may be changed to, for example, a piston type or a vane type.

Description of the reference symbols

10 … electric compressor, 11 … casing, 17 … compression section, 18 … electric motor, 20 … motor drive circuit, 27 … motor wiring, 31 … conductive member, 40 … connector, 50 … connection terminal, 60 … cluster block, 61 … housing member, 63 … terminal insertion hole, 63a … inner peripheral surface, 66 … conductive member insertion hole, 71 … cover member, 72 … cover portion, 72a … outer peripheral surface, 72b … 1 st end surface, 72c … 2 nd end surface, 73 … motor wiring insertion section, 74 … extension section, 75 … projection section, 75a … outer peripheral surface, 80 … cover member, 81 … projection insertion hole, 81a … inner peripheral surface, 82 … motor wiring passage section, 90 … resin.

Claims

1. An electric compressor is provided with:

an electric motor;

a compression section driven by the electric motor;

a housing that houses the electric motor and the compression unit;

a motor drive circuit that drives the electric motor;

a motor wiring led out from the electric motor;

a conductive member electrically connected to the motor drive circuit; and

a connector housed in the housing and connecting the motor wiring and the conductive member,

the connector is provided with:

a connection terminal electrically connecting the motor wiring and the conductive member; and

an insulating cluster block for accommodating the connection terminals,

the electric compressor is characterized in that it is provided with,

the cluster block is provided with:

a housing member having a terminal insertion hole into which the connection terminal is inserted and a conductive member insertion hole into which the conductive member is inserted; and

a cover member for covering the opening of the container,

the cover member has a cover portion that closes off an opening of the terminal insertion hole and an extension portion that extends from the cover portion toward the conductive member insertion hole,

the connection terminal has a 1 st connection part and a 2 nd connection part,

the conductive member is inserted into the 2 nd connecting portion,

the extending portion abuts against the 2 nd connecting portion to restrict movement of the connection terminal toward the opening of the terminal insertion hole.

2. The motor-driven compressor according to claim 1,

the 1 st connecting part is connected with the motor wiring,

the extension portion extends in parallel with respect to the 1 st connecting portion.

3. The motor-driven compressor according to claim 2,

the cover portion has a motor wiring insertion portion through which the motor wiring is inserted,

the connector further includes an insulating cover member that covers a 2 nd end surface of the cover portion opposite to a 1 st end surface that is an end surface from which the extended portion extends, and that has a motor wiring passage portion through which the motor wiring is inserted,

when viewed from an insertion direction of the connection terminal with respect to the terminal insertion hole, a part of the motor wiring passing portion overlaps with a part of the motor wiring insertion portion, and the part of the motor wiring insertion portion is blocked by the cover member.

4. The motor-driven compressor according to claim 3,

the cover member has a projection projecting from the 2 nd end face,

the cover member has a projection insertion hole through which the projection is inserted,

the inner peripheral surface of the terminal insertion hole surrounds the outer peripheral surface of the protruding portion,

the motor wiring is inserted through the motor wiring passage portion between an inner peripheral surface of the terminal insertion hole and an outer peripheral surface of the protruding portion,

resin is filled between an inner peripheral surface of the terminal insertion hole and an outer peripheral surface of the protruding portion.

5. The motor-driven compressor according to claim 4,

the motor wiring insertion portion is a groove recessed in an outer peripheral surface of the lid portion,

the motor wiring passing portion is a groove recessed in an inner peripheral surface of the protruding portion insertion hole.

6. The motor-driven compressor according to claim 3 or 4,

the motor wiring insertion portion and the motor wiring passage portion are formed in a hole shape.

7. The motor-driven compressor according to claim 1,

the cover member has a projection projecting from a 2 nd end surface of the cover portion on a side opposite to a 1 st end surface from which the extension extends,

the motor wiring is inserted through the motor wiring insertion portion between an inner peripheral surface of the terminal insertion hole and an outer peripheral surface of the protruding portion,