JP2020162270A - Motor compressor - Google Patents

Abstract

To provide a motor compressor capable of suppressing an increase in a size of housing due to an arrangement of harnesses.SOLUTION: A motor compressor includes: a harness 30; a holder 60 having a holder body 61 that holds a first bus bar 65 and a capacitor 68; and a case 14 in which a connector insertion hole 14h through which the harness 30 is inserted is formed while storing one part of the harness 30, the holder 60, and a circuit board 40. When viewing the circuit board 40 in a plane view, the holder 60 is arranged between the connector insertion hole 14h and the circuit board 40. The holder 60 has a first wall portion 62a and a second wall portion 62b arranged so as to sandwich a first connection terminal 32 of the harness 30. The first wall portion 62a and the second wall portion 62b are arranged side by side so as to intersect a connecting direction between the first connection terminal 32 of the harness 30 and a first electric wire 34. The first wall portion 62a is arranged between the connector insertion hole 14h and the first connection terminal 32.SELECTED DRAWING: Figure 2

Description

The present invention relates to an electric compressor.

Patent Document 1 discloses an electric compressor mounted on a vehicle. The electric compressor includes a rotating shaft, an electric motor that rotates the rotating shaft, a compression unit that compresses fluid by rotating the rotating shaft, and a motor driving unit having a circuit board for driving the electric motor. .. Further, the electric compressor includes a capacitor unit, a harness, and a housing having an accommodation space inside for accommodating the circuit board and the capacitor unit. The capacitor unit has a case member, a capacitor housed in the case member, a harness-side terminal to which a harness is connected, and a substrate-side terminal to be connected to a circuit board. Electric power is supplied to the motor drive unit by connecting the harness to the power source mounted on the vehicle. In the harness, the part connected to the power supply is exposed to the outside of the housing through the harness insertion hole formed in the housing, and the part connected to the harness side terminal is housed inside the housing. ..

JP-A-2018-78770

By the way, depending on the arrangement of the electric compressor in the vehicle, it is required to shorten the length of the portion of the harness exposed to the outside of the housing. For example, as a method of shortening the length of the portion of the harness exposed to the outside of the housing, it is conceivable to shorten the length of the entire harness. However, the harness is mainly manufactured by manual work by an operator, and there is a limit to shortening the length of the entire harness for the convenience of ensuring the safety of the operator. Further, if the length of the portion of the harness exposed to the outside of the housing is shortened without changing the length of the entire harness, the length of the portion of the harness accommodated inside the accommodation space becomes longer. However, most of the interior of the accommodation space is already occupied by other parts such as filters. Therefore, the housing becomes large depending on the arrangement of the harness inside the accommodation space.

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 suppressing an increase in size of a housing due to an arrangement of harnesses.

An electric compressor for solving the above problems includes a rotating shaft, an electric motor that rotates the rotating shaft, a compression unit that compresses fluid by rotating the rotating shaft, a connector, a connection terminal, and the connector. A motor drive unit having a harness having an electric wire connecting the connection terminals, a bus bar to which the connection terminals are connected, a holder having a holder body for holding electronic components, and a circuit board for driving the electric motor. The circuit board includes a part of the harness, a holder, and a housing having a storage space for accommodating the circuit board and a harness insertion hole through which the harness is inserted. Connected to the bus bar and the electronic component, the holder is arranged between the harness insertion hole and the circuit board when the circuit board is viewed in a plan view, and protrudes from the outer surface of the holder body and connects the connection terminal. A guide portion having a pair of wall portions arranged so as to be sandwiched is provided, and the pair of wall portions are arranged side by side so as to intersect the connection direction of the connection terminal and the electric wire, and the pair of walls are arranged side by side. It is a gist that one of the portions is located between the harness insertion hole and the connection terminal.

According to this, since one of the pair of wall portions is located between the harness insertion hole and the connection terminal, the electric wire can be connected to the connector by bypassing one of the pair of wall portions from the connection terminal. Curve. Therefore, as compared with the case where the electric wire is arranged so as to extend linearly between the harness insertion hole and the connection terminal without shortening the length of the portion of the electric wire accommodated inside the accommodation space. Since the distance between the harness insertion hole and the holder in the direction in which the harness insertion hole and the connection terminal are lined up is shortened, the distance between the harness insertion hole and the circuit board can be shortened. Therefore, it is possible to suppress an increase in the size of the housing due to the arrangement of the harness.

Further, the electric compressor is provided with a bolt for connecting the connection terminal to the bus bar and attaching to the holder body, and the bolt is arranged between the pair of wall portions and the circuit board. When viewed in a plan view, it is preferably arranged so as to be aligned with the electronic component.

When the connection terminal is connected to the bus bar and attached to the holder body with bolts, the holder body is required to have a thickness for screwing the bolts. Here, when the bolts are arranged so as to overlap the electronic components when the circuit board is viewed in a plan view, if the thickness of the holder body is to be secured, the distance from the outer surface of the holder body to the electronic components becomes long, and the circuit board The holder becomes large in the thickness direction of. On the other hand, when the bolts are arranged so as to line up with the electronic components when the circuit board is viewed in a plan view, the thickness of the holder body can be secured in a portion different from the portion that holds the electronic components. The distance from the outer surface to the electronic components can be shortened. Therefore, the increase in size of the holder in the plate thickness direction of the circuit board is suppressed. As a result, it is possible to suppress the increase in size of the housing due to the increase in size of the holder.

Further, with respect to the electric compressor, it is preferable that a part of the electric wire is arranged so as to overlap with the electronic component when the circuit board is viewed in a plan view.
When the electric wires are arranged so as not to overlap the electronic components when the circuit board is viewed in a plan view, the housing becomes large due to the difference between the area where the electric wires are arranged and the area where the electronic components are arranged. On the other hand, when the circuit board is viewed in a plan view, a part of the electric wire is arranged so as to overlap with the electronic component, so that a part of the area where the electric wire is arranged and the area where the electronic component is arranged overlap with each other. Even if the electric wires are arranged in a curved state, the size of the housing is suppressed. Therefore, it is possible to further suppress the increase in size of the housing due to the arrangement of the harness.

Further, with respect to the electric compressor, the holder protrudes from the outer surface of the holder body and has a regulation wall located on the opposite side of the electronic component with the electronic component sandwiched in a plan view of the circuit board. preferable.

According to this, since a part of the curved electric wire comes into contact with the regulation wall, the electric wire is less likely to protrude to the outside than the holder body. Therefore, it is possible to suppress an increase in the size of the housing that may occur by arranging a portion of the electric wire that protrudes outside the holder body. Therefore, it is possible to further suppress the increase in size of the housing due to the arrangement of the harness.

Further, regarding the electric compressor, the connection terminal includes a first connection terminal and a second connection terminal, and the electric wire includes a first electric wire connecting the connector and the first connection terminal, and the connector. And a second electric wire for connecting the second connection terminal, and the guide portion is arranged so as to sandwich the first connection terminal and the first guide portion arranged so as to sandwich the first connection terminal. It is preferable to include the second guide portion.

According to this, the first electric wire is curved by the first guide portion, and the second electric wire is curved by the second guide portion. By bending both the first electric wire and the second electric wire in this way, it is possible to suppress an increase in the size of the housing due to the arrangement of the harness, as compared with the case where either one of the first electric wire and the second electric wire is curved.

Further, regarding the electric compressor, the first connection terminal is located between the harness insertion hole and the second connection terminal, and the other of the pair of wall portions of the first guide portion is the second. It is preferable that the guide portion also serves as one of the pair of wall portions.

According to this, the number of wall portions can be reduced as compared with the case where one of the pair of wall portions of the second guide portion is provided separately from the other of the pair of wall portions of the first guide portion. Therefore, the configuration of the holder can be simplified.

According to the present invention, it is possible to suppress an increase in the size of the housing due to the arrangement of the harness.

The cross-sectional view which shows typically the electric compressor. A plan view showing the inside of the accommodation space when the substrate is viewed in a plan view. A perspective view showing the inside of the accommodation space. Sectional drawing which shows the inside of the accommodation space. Sectional drawing which shows the inside of the accommodation space.

Hereinafter, an embodiment in which the electric compressor is embodied will be described with reference to FIGS. 1 to 5. The electric compressor of the present embodiment is arranged in the engine room of the vehicle. Further, the electric compressor of the present embodiment is used for a vehicle air conditioner.

As shown in FIG. 1, the housing 11 of the electric compressor 10 has a bottomed tubular motor housing 12 and a bottomed tubular discharge housing 13 connected to the motor housing 12. The motor housing 12 and the discharge housing 13 are made of a metal material. The motor housing 12 and the discharge housing 13 of the present embodiment are made of aluminum. The motor housing 12 has a bottom portion 12a and a tubular portion 12b extending in a tubular shape from the outer peripheral edge of the bottom portion 12a. The discharge housing 13 is connected to the opening side of the motor housing 12.

Inside the motor housing 12, a rotating shaft 15, an electric motor 16 that rotates the rotating shaft 15, and a compression unit 17 that is driven by the rotation of the rotating shaft 15 to compress the refrigerant as a fluid are housed. .. The electric motor 16 and the compression unit 17 are arranged side by side in the axial direction of the rotating shaft 15, which is the direction in which the rotating axis of the rotating shaft 15 extends. In the axial direction of the rotating shaft 15, the electric motor 16 is located closer to the bottom portion 12a of the motor housing 12 than the compression portion 17.

The electric motor 16 includes a tubular stator 18 and a rotor 19 arranged inside the stator 18. The rotor 19 rotates integrally with the rotating shaft 15. The stator 18 surrounds the rotor 19. The rotor 19 has a rotor core 19a anchored to the rotating shaft 15 and a plurality of permanent magnets 19b provided on the rotor core 19a. The stator 18 has a tubular stator core 18a and a coil 18b wound around the stator core 18a. When electric power is supplied to the coil 18b, the rotor 19 rotates, and the rotating shaft 15 rotates integrally with the rotor 19.

The compression unit 17 of the present embodiment is a scroll type including a fixed scroll (not shown) fixed in the motor housing 12 and a movable scroll (not shown) arranged to face the fixed scroll.

A suction port 12h is formed in the tubular portion 12b of the motor housing 12. The suction port 12h sucks the refrigerant into the motor housing 12. One end of the external refrigerant circuit 10a is connected to the suction port 12h. A discharge port 13h is formed in the discharge housing 13. The other end of the external refrigerant circuit 10a is connected to the discharge port 13h.

The refrigerant sucked into the motor housing 12 from the external refrigerant circuit 10a via the suction port 12h is compressed by the compression unit 17 by driving the compression unit 17 and flows out to the external refrigerant circuit 10a via the discharge port 13h. Then, the refrigerant flowing out to the external refrigerant circuit 10a returns to the motor housing 12 via the suction port 12h via the heat exchanger and the expansion valve of the external refrigerant circuit 10a. The electric compressor 10 and the external refrigerant circuit 10a constitute the vehicle air conditioner 100.

The housing 11 has a case 14 that is attached to the motor housing 12. The case 14 is made of a metal material. The case 14 of this embodiment is made of aluminum. The case 14 has a bottomed tubular case body 141 and a lid 142 that closes the opening of the case body 141. The case body 141 has a bottom wall 141a and a peripheral wall 141b extending in a tubular shape from the outer peripheral edge of the bottom wall 141a. Inside the case 14, a storage space S is formed by the inner surface of the case main body 141 and the inner surface of the lid portion 142. At the corners of the bottom wall 141a, a circular connector insertion hole 14h is formed as a harness insertion hole penetrating the bottom wall 141a. The accommodation space S communicates with the outside of the case 14 via the connector insertion hole 14h.

The case 14 is attached to the motor housing 12 by connecting the bottom wall 141a of the case body 141 to the bottom 12a of the motor housing 12. The area of the bottom wall 141a is larger than the area of the bottom portion 12a of the motor housing 12. Therefore, a part of the bottom wall 141a protrudes outward from the edge portion of the bottom portion 12a of the motor housing 12. The connector insertion hole 14h is formed in a portion of the bottom wall 141a that protrudes from the edge of the bottom portion 12a. As a result, the accommodation space S communicates with the outside of the housing 11 via the connector insertion hole 14h.

The motor drive unit 20, a part of the harness 30, and the holder 60 are housed in the storage space S. The motor drive unit 20 has a circuit board 40 for driving the electric motor 16. Inside the accommodation space S, the circuit board 40 is arranged so that the plate thickness direction coincides with the axial direction of the rotating shaft 15. In addition, another part such as a filter (not shown) is also accommodated in the accommodation space S.

As shown in FIG. 2, the harness 30 of the present embodiment includes a connector 31, a first connection terminal 32 as a connection terminal, a second connection terminal 33 as a connection terminal, and a connector 31 and a first connection terminal 32. It has a first electric wire 34 as an electric wire for connecting the above, and a second electric wire 35 as an electric wire for connecting the connector 31 and the second connection terminal 33.

As shown in FIG. 1, the connector 31 is connected to the power supply 101 mounted on the vehicle. The connector 31 has a connector main body 31a and a first conductive member and a second conductive member (not shown) housed in the connector main body 31a.

Each of the first electric wire 34 and the second electric wire 35 is composed of a core wire (not shown) and an insulating coating portion (not shown) covering the core wire. The first electric wire 34 and the second electric wire 35 have flexibility, respectively. One end of the first electric wire 34 is connected to the first conductive member of the connector 31. One end of the second electric wire 35 is connected to the second conductive member of the connector 31.

As shown in FIG. 3, the first connection terminal 32 has a plate-shaped first connection portion 36 and a second connection portion 37 continuous with the first connection portion 36. The direction in which the first connection portion 36 and the second connection portion 37 are continuous is defined as the longitudinal direction of the first connection terminal 32. The second connecting portion 37 has a tubular shape, and the axial center of the second connecting portion 37 extends in the longitudinal direction of the first connecting terminal 32. The first connection terminal 32 is formed with a through hole 36h that penetrates the first connection portion 36 in the thickness direction. The longitudinal direction of the first connection terminal 32 and the direction orthogonal to the penetration direction of the through hole 36h are defined as the lateral direction of the first connection terminal 32. The first electric wire 34 and the first connection terminal 32 are obtained by crimping the second connection portion 37 with the other end of the first electric wire 34 inserted inside the second connection portion 37 of the first connection terminal 32. Connected to each other. The longitudinal direction of the first connection terminal 32 coincides with the connection direction of the first connection terminal 32 and the first electric wire 34.

The second connection terminal 33 has a plate-shaped first connection portion 36 and a second connection portion 37 continuous with the first connection portion 36. The direction in which the first connection portion 36 and the second connection portion 37 are continuous is defined as the longitudinal direction of the second connection terminal 33. The second connecting portion 37 has a tubular shape, and the axial center of the second connecting portion 37 extends in the longitudinal direction of the second connecting terminal 33. The second connection terminal 33 is formed with a through hole 36h that penetrates the first connection portion 36 in the thickness direction. The longitudinal direction of the second connection terminal 33 and the direction orthogonal to the penetration direction of the through hole 36h are defined as the lateral direction of the second connection terminal 33. The second electric wire 35 and the second connection terminal 33 are obtained by crimping the second connection portion 37 with the other end of the second electric wire 35 inserted inside the second connection portion 37 of the second connection terminal 33. Connected to each other. The longitudinal direction of the second connection terminal 33 coincides with the connection direction of the second connection terminal 33 and the second electric wire 35.

As shown in FIGS. 4 and 5, the holder 60 includes a box-shaped holder body 61. The holder body 61 is made of an insulating material. One outer surface of the holder body 61 is a first surface 61a, and the outer surface of the holder body 61 opposite to the first surface 61a is a second surface 61b. As shown in FIG. 1, the holder 60 is housed in the storage space S so that the direction in which the first surface 61a and the second surface 61b form a pair coincides with the plate thickness direction of the circuit board 40.

As shown in FIG. 3, the holder 60 has a harness guide 62 projecting from the first surface 61a of the holder body 61, and a regulation wall 63 also projecting from the first surface 61a of the holder body 61. Further, as shown in FIGS. 4 and 5, the holder 60 has a recess 64 recessed in the second surface 61b of the holder body 61.

As shown in FIG. 2, the harness guide 62 has a first wall portion 62a, a second wall portion 62b, and a third wall portion 62c as wall portions. The first to third wall portions 62a to 62c each extend linearly. The first to third wall portions 62a to 62c are in a parallel relationship with each other. The first wall portion 62a, the second wall portion 62b, and the third wall portion 62c are arranged in this order. The second wall portion 62b is located between the first wall portion 62a and the third wall portion 62c.

In the direction in which the first to third wall portions 62a to 62c extend, the dimensions of the first wall portion 62a are the same as the dimensions of the third wall portion 62c, and the dimensions of the second wall portion 62b are the dimensions of the first wall portion 62a. Longer than the dimensions. In the direction in which the first to third wall portions 62a to 62c are lined up, the shortest distance L1 between the first wall portion 62a and the second wall portion 62b is shorter than the longitudinal dimension L32 of the first connection terminal 32, and the first It is longer than the lateral dimension of the connection terminal 32. Further, in the direction in which the first to third wall portions 62a to 62c are lined up, the shortest distance L2 between the second wall portion 62b and the third wall portion 62c is shorter than the longitudinal dimension L33 of the second connection terminal 33. It is longer than the lateral dimension of the second connection terminal 33.

The harness guide 62 of the present embodiment has a connecting wall portion 62d that connects one ends of the first to third wall portions 62a to 62c. The connecting wall portion 62d extends in the direction in which the first to third wall portions 62a to 62c are lined up. Therefore, the gap between the first wall portion 62a and the second wall portion 62b is closed by the connecting wall portion 62d on one end side of the first to third wall portions 62a to 62c, and is open on the other end side. .. Further, the gap between the second wall portion 62b and the third wall portion 62c is closed by the connecting wall portion 62d on one end side of the first to third wall portions 62a to 62c, and is open on the other end side. .. A part of the harness guide 62 on the connecting wall portion 62d side protrudes from the edge portion of the first surface 61a of the holder body 61.

As shown in FIG. 2, when the circuit board 40 is viewed in a plan view from the plate thickness direction, the regulation wall 63 is on the side opposite to the connecting wall portion 62d with the first to third wall portions 62a to 62c of the harness guide 62 interposed therebetween. Have been placed. The recess 64 is arranged between the harness guide 62 and the regulation wall 63 when the circuit board 40 is viewed in a plan view. In other words, the regulation wall 63 is located on the opposite side of the harness guide 62 with the recess 64 in the plan view of the circuit board 40. The regulation wall 63 is formed on a portion of the edge portion of the first surface 61a of the holder body 61 that is located on the side opposite to the portion where the connecting wall portion 62d protrudes.

As shown in FIG. 4, a nut accommodating hole 61c for accommodating the nut 611 is formed on the first surface 61a of the holder main body 61. Although only one nut 611 and one nut accommodating hole 61c are shown in FIG. 4, the first to third wall portions 62a to 62c are arranged on the first surface 61a of the holder main body 61. Two nut accommodating holes 61c arranged side by side are formed, and nuts 611 are accommodated in each of the nut accommodating holes 61c. Of the two nut accommodating holes 61c, one nut accommodating hole 61c is located between the first wall portion 62a and the second wall portion 62b, and the other nut accommodating hole 61c is located between the second wall portion 62b and the third wall portion 62b. It is located between the portion 62c and the portion 62c. The holder body 61 has a screw hole 61h formed by the inner peripheral surface of the nut 611 located between the first wall portion 62a and the second wall portion 62b. Further, the holder body 61 has a screw hole 61h formed by the inner peripheral surface of the nut 611 located between the second wall portion 62b and the third wall portion 62c.

As shown in FIG. 3, the holder 60 holds the first bus bar 65 and the second bus bar 66 as bus bars. One end 65a of the first bus bar 65 is exposed on the first surface 61a of the holder body 61 between the first wall 62a and the second wall 62b, and the other end of the first bus bar 65 (not shown) is a circuit. It is connected to the first bus bar connecting portion 41 of the board 40. One end 66a of the second bus bar 66 is exposed on the first surface 61a of the holder body 61 between the second wall 62b and the third wall 62c, and the other end of the second bus bar 66 (not shown) is a circuit. It is connected to the second bus bar connecting portion 42 of the board 40. As shown in FIG. 4, an insertion hole 67 is formed in one end 66a of the second bus bar 66. The insertion hole 67 of the second bus bar 66 communicates with the screw hole 61h located between the second wall portion 62b and the third wall portion 62c. An insertion hole 67 is formed at one end 65a of the first bus bar 65. The insertion hole 67 of the first bus bar 65 communicates with the screw hole 61h located between the first wall portion 62a and the second wall portion 62b.

As shown in FIGS. 4 and 5, the holder 60 holds a capacitor 68 as an electronic component. The capacitor 68 has a capacitor body 68a held in a recess 64 of the holder body 61. Further, as shown in FIG. 2, the capacitor 68 has a first lead portion 68b extending from the capacitor main body 68a and a second lead portion 68c extending from the capacitor main body 68a.

The circuit board 40 has a first capacitor connecting portion 43 to which the first lead portion 68b of the capacitor 68 is connected, and a second capacitor connecting portion 44 to which the second lead portion 68c of the capacitor 68 is connected. The first capacitor connection portion 43 is electrically connected to the first bus bar connection portion 41 by a conductor pattern (not shown) formed on the circuit board 40. The second capacitor connection portion 44 is electrically connected to the second bus bar connection portion 42 by a conductor pattern (not shown) formed on the circuit board 40. Electronic components other than the above-mentioned electronic components are also mounted on the circuit board 40. The capacitor 68 constitutes a filter circuit together with a coil mounted on the circuit board 40.

The circuit board 40 and the holder 60 are each attached to the bottom wall 141a of the case body 141 by mounting bolts 21. As shown in FIG. 1, the circuit board 40 overlaps most of the bottom wall 141a of the case 14. The first surface 61a of the holder body 61 faces the inner surface of the lid 142, and the second surface 61b of the holder body 61 faces the inner surface of the bottom wall 141a of the case body 141. Further, the capacitor main body 68a is fixed to the inner surface of the recess 64 and the inner surface of the bottom wall 141a of the case main body 141 by an adhesive (not shown).

As shown in FIG. 2, the holder 60 is arranged between the connector insertion hole 14h and the circuit board 40 when the circuit board 40 is viewed in a plan view. The holder 60 is arranged at a corner of the bottom wall 141a of the case body 141. The harness guide 62 is arranged side by side with the connector insertion hole 14h. The connector insertion hole 14h is located on the side opposite to the second wall portion 62b with the first wall portion 62a interposed therebetween, and the circuit board 40 is on the side opposite to the second wall portion 62b with the third wall portion 62c interposed therebetween. positioned. The surface of the connecting wall portion 62d of the harness guide 62 opposite to the first to third wall portions 62a to 62c faces the inner peripheral surface of the peripheral wall 141b of the case body 141.

As shown in FIG. 1, the connector 31 of the harness 30 is fitted into the connector insertion hole 14h. The portions of the connector 31 opposite to the first electric wire 34 and the second electric wire 35 project from the outer surface of the bottom wall 141a of the case body 141 to the outside of the case 14. Therefore, a part of the connector 31 projects to the outside of the housing 11. In the axial direction of the rotating shaft 15, a part of the connector 31 protrudes from the case 14 toward the electric motor 16. The first connection terminal 32, the second connection terminal 33, the first electric wire 34, and the second electric wire 35 of the harness 30 are accommodated in the accommodation space S. As shown in FIG. 3, the first connection terminal 32 of the harness 30 is connected to one end 65a of the first bus bar 65 of the holder 60, and the second connection terminal 33 of the harness 30 is the second bus bar 66 of the holder 60. It is connected to one end 66a.

Here, the connection structure of the first connection terminal 32 to the first bus bar 65 and the connection structure of the second connection terminal 33 to the second bus bar 66 will be described in detail.
As shown in FIG. 4, the second connection terminal 33 is arranged so as to overlap the one end portion 66a of the second bus bar 66. Similarly, the first connection terminal 32 is arranged so as to overlap the one end portion 65a of the first bus bar 65. Therefore, as shown in FIG. 2, the second connection terminal 33 is arranged between the second wall portion 62b and the third wall portion 62c, and the first connection terminal 32 is the first wall portion 62a and the second wall portion 62a. It is arranged between the wall portion 62b. The first wall portion 62a and the second wall portion 62b form a pair of wall portions of the first guide portion arranged so as to sandwich the first connection terminal 32. The second wall portion 62b and the third wall portion 62c form a pair of wall portions of the second guide portion arranged so as to sandwich the second connection terminal 33.

The longitudinal directions of the first connection terminal 32 and the second connection terminal 33 coincide with the directions in which the first to third wall portions 62a to 62c extend, respectively, and the lateral directions of the first connection terminal 32 and the second connection terminal 33 are Each of them coincides with the direction in which the first to third wall portions 62a to 62c are lined up. That is, the longitudinal directions of the first connection terminal 32 and the second connection terminal 33 intersect with respect to the direction in which the first to third wall portions 62a to 62c are lined up, respectively. In other words, the first to third wall portions 62a to 62c are arranged side by side so as to intersect the longitudinal direction of the first connection terminal 32 and the second connection terminal 33. When the circuit board 40 is viewed in a plan view, the second connection portion 37 of the first connection terminal 32 and the second connection terminal 33 is located on the side opposite to the connection wall portion 62d of the harness guide 62 with the first connection portion 36 interposed therebetween. are doing. When the circuit board 40 is viewed in a plan view, the first connection portion 36 of the first connection terminal 32 and the second connection terminal 33 are located on the opposite sides of the second connection portion 37 from the capacitor 68, respectively.

As shown in FIG. 4, the through hole 36h of the second connection terminal 33 communicates with the insertion hole 67 of the second bus bar 66 and the screw hole 61h of the nut 611. The connection bolt 22 as a bolt is inserted into the through hole 36h of the second connection terminal 33 and the insertion hole 67 of the second bus bar 66 in this order, and then screwed into the screw hole 61h of the nut 611. As a result, the second connection terminal 33 is attached to the holder body 61 and is electrically connected to one end 66a of the second bus bar 66. Therefore, the harness 30 is electrically connected to the capacitor 68 via the second bus bar 66 and the circuit board 40. The through hole 36h of the first connection terminal 32 communicates with the insertion hole 67 of the first bus bar 65 and the screw hole 61h of the nut 611. The connection bolt 22 as a bolt is inserted into the through hole 36h of the first connection terminal 32 and the insertion hole 67 of the first bus bar 65 in this order, and then screwed into the screw hole 61h of the nut 611. As a result, the first connection terminal 32 is attached to the holder main body 61 and is electrically connected to one end portion 65a of the first bus bar 65. The harness 30 is electrically connected to the capacitor 68 via the first bus bar 65 and the circuit board 40.

As shown in FIG. 3, in a state where the connector 31 of the harness 30 is fitted into the connector insertion hole 14h and the first connection terminal 32 and the second connection terminal 33 are attached to the holder 60, the connector in the first electric wire 34 The portion on the 31 side extends from the connector 31 toward the first surface 61a of the holder body 61 in the plate thickness direction of the circuit board 40. The portion of the first electric wire 34 on the first connection terminal 32 side extends along the first surface 61a of the holder body 61. The portion of the second electric wire 35 on the connector 31 side extends from the connector 31 toward the first surface 61a of the holder body 61 in the plate thickness direction of the circuit board 40. The portion of the second electric wire 35 on the side of the second connection terminal 33 extends along the first surface 61a of the holder body 61.

As shown in FIG. 2, the distance between the connector insertion hole 14h and the first connection terminal 32 is shorter than the length of the first electric wire 34. The first wall portion 62a is located between the connector insertion hole 14h and the first connection terminal 32. Specifically, the first wall portion 62a is arranged so as to block the line segment P connecting the center of the connector insertion hole 14h and the central portion in the longitudinal direction of the first connection terminal 32. Therefore, the first wall portion 62a is located between the connector insertion hole 14h and the first connection terminal 32 of the pair of wall portions included in the first guide portion, and the second wall portion 62b is the second wall portion 62b. It is the other of the pair of wall portions that one guide portion has.

The distance between the connector insertion hole 14h and the second connection terminal 33 is shorter than the length of the second electric wire 35. The first wall portion 62a, the first connection terminal 32, and the second wall portion 62b are located in this order between the connector insertion hole 14h and the second connection terminal 33. Specifically, the first wall portion 62a, the first connection terminal 32, and the second wall portion 62b block the line segment Q connecting the center of the connector insertion hole 14h and the central portion in the longitudinal direction of the second connection terminal 33. It is located in. Therefore, the second wall portion 62b is located between the connector insertion hole 14h and the second connection terminal 33 of the pair of wall portions included in the second guide portion, and the third wall portion 62c is the third wall portion 62c. It is the other of the pair of wall portions of the two guide portions. Further, the second wall portion 62b also serves as one of the pair of wall portions of the first guide portion and one of the pair of wall portions of the second guide portion.

The first electric wire 34 bypasses the first wall portion 62a from the connector 31 and is connected to the first connection terminal 32. Therefore, when the circuit board 40 is viewed in a plan view, the first electric wire 34 is curved so as to be concave from the harness guide 62 side toward the capacitor 68 side in the direction in which the first to third wall portions 62a to 62c extend. .. Further, a part of the first electric wire 34 is arranged so as to overlap the capacitor main body 68a of the capacitor 68 when the circuit board 40 is viewed in a plan view. The second electric wire 35 is connected to the second connection terminal 33 from the connector 31 by bypassing the first wall portion 62a, the first connection terminal 32, and the second wall portion 62b. Therefore, when the circuit board 40 is viewed in a plan view, the second electric wire 35 is curved so as to be concave from the harness guide 62 side toward the capacitor 68 side in the direction in which the first to third wall portions 62a to 62c extend. .. A part of the second electric wire 35 is arranged so as to overlap the capacitor body 68a of the capacitor 68 when the circuit board 40 is viewed in a plan view. In the present embodiment, a part of the curved portion of the second electric wire 35 is in contact with the regulation wall 63 of the holder 60.

Then, by connecting the connector 31 to the power supply 101, electric power is supplied from the power supply 101 to the motor drive unit 20.
The operation of this embodiment will be described.

When the first electric wire 34 and the second electric wire 35 of the harness 30 are linearly arranged inside the accommodation space S of the housing 11, the distance from the connector insertion hole 14h to the holder 60 is the first electric wire 34 and the second electric wire 35. It is determined by the length of the portion accommodated inside the accommodation space S in. Therefore, when the length of the portion of the harness 30 exposed to the outside of the housing 11 is shortened and the length of the portion of the first electric wire 34 and the second electric wire 35 accommodated inside the accommodation space S becomes longer, the connector The distance from the insertion hole 14h to the holder 60 also becomes long. Since the holder 60 is arranged between the connector insertion hole 14h and the circuit board 40, the longer the distance from the connector insertion hole 14h to the holder 60, the longer the distance from the connector insertion hole 14h to the circuit board 40. The case 14 becomes larger by the minute.

The holder 60 of the present embodiment has a first wall portion 62a and a second wall portion 62b that protrude from the first surface 61a of the holder main body 61 and are arranged so as to sandwich the first connection terminal 32 of the harness 30. ing. The shortest distance L1 between the first wall portion 62a and the second wall portion 62b is shorter than the longitudinal dimension L32 of the first connection terminal 32. Therefore, the longitudinal direction of the first connection terminal 32 intersects the direction in which the first wall portion 62a and the second wall portion 62b are lined up. In other words, the first wall portion 62a and the second wall portion 62b are arranged side by side so as to intersect the connection direction between the first connection terminal 32 and the first electric wire 34. Further, the first wall portion 62a is located between the connector insertion hole 14h and the first connection terminal 32. Therefore, the first electric wire 34 is curved by being connected to the connector 31 by bypassing the first wall portion 62a from the first connection terminal 32.

The holder 60 of the present embodiment has a second wall portion 62b and a third wall portion 62c arranged so as to project from the first surface 61a of the holder main body 61 and sandwich the second connection terminal 33 of the harness 30. ing. The shortest distance L2 between the second wall portion 62b and the third wall portion 62c is shorter than the longitudinal dimension L33 of the second connection terminal 33. Therefore, the longitudinal direction of the second connection terminal 33 intersects the direction in which the second wall portion 62b and the third wall portion 62c are lined up. In other words, the second wall portion 62b and the third wall portion 62c are arranged side by side so as to intersect the connection direction between the second connection terminal 33 and the second electric wire 35. Further, the second wall portion 62b is located between the connector insertion hole 14h and the second connection terminal 33. Therefore, the second electric wire 35 is curved by bypassing the second wall portion 62b from the second connection terminal 33 and connecting to the connector 31.

Therefore, as compared with the case where the first electric wire 34 and the second electric wire 35 are arranged linearly, from the connector insertion hole 14h in the direction in which the connector insertion hole 14h, the first connection terminal 32, and the second connection terminal 33 are aligned. Since the distance to the holder 60 is shortened, the distance from the connector insertion hole 14h to the circuit board 40 can be shortened. As a result, even if the length of the portion of the first electric wire 34 and the second electric wire 35 accommodated inside the accommodation space S becomes long, the increase in size of the housing 11 due to the arrangement of the harness 30 is suppressed.

The effect of this embodiment will be described.
(1) The first wall portion 62a and the second wall portion 62b of the holder 60 are arranged side by side so as to intersect the connection direction between the first connection terminal 32 and the first electric wire 34. Further, the first wall portion 62a is located between the connector insertion hole 14h and the first connection terminal 32. Therefore, the first electric wire 34 is curved by being connected to the connector 31 by bypassing the first wall portion 62a from the first connection terminal 32. The second wall portion 62b and the third wall portion 62c are arranged side by side so as to intersect the connection direction between the second connection terminal 33 and the second electric wire 35. Further, the second wall portion 62b is located between the connector insertion hole 14h and the second connection terminal 33. Therefore, the second electric wire 35 is curved by bypassing the second wall portion 62b from the second connection terminal 33 and connecting to the connector 31. Therefore, as compared with the case where the first electric wire 34 and the second electric wire 35 are arranged so as to extend linearly, the connector insertion in the direction in which the connector insertion hole 14h and the first connection terminal 32 and the second connection terminal 33 are lined up. The distance between the hole 14h and the holder 60 can be shortened, and the distance between the connector insertion hole 14h and the circuit board 40 can also be shortened. Therefore, it is possible to suppress an increase in the size of the housing 11 due to the arrangement of the harness 30.

(2) The connection bolt 22 inserted into the insertion hole 67 of the first bus bar 65 and the through hole 36h of the first connection terminal 32 is screwed into the screw hole 61h of the holder body 61, so that the first connection terminal 32 is formed. It is connected to the first bus bar 65 and attached to the holder body 61. Further, the connection bolt 22 inserted into the insertion hole 67 of the second bus bar 66 and the through hole 36h of the second connection terminal 33 is screwed into the screw hole 61h of the holder main body 61, so that the second connection terminal 33 becomes. It is connected to the second bus bar 66 and attached to the holder body 61. In this case, the holder body 61 is required to have a thickness for screwing the connection bolt 22.

Here, when the connection bolt 22 is formed so as to overlap the capacitor 68 when the circuit board 40 is viewed in a plan view, when trying to secure the thickness of the holder body 61, the capacitor 68 is formed from the first surface 61a of the holder body 61. The distance to the circuit board 40 becomes long, and the holder 60 becomes large in the thickness direction of the circuit board 40. On the other hand, in the present embodiment, the connection bolt 22 is formed so as to be aligned with the capacitor 68 when the circuit board 40 is viewed in a plan view. That is, the connection bolt 22 is arranged so as not to overlap the capacitor 68 when the circuit board 40 is viewed in a plan view. In this case, since the thickness of the holder body 61 can be secured in a portion different from the portion that holds the capacitor 68, the distance from the first surface 61a of the holder body 61 to the capacitor 68 can be shortened. Therefore, the increase in size of the holder 60 in the plate thickness direction of the circuit board 40 is suppressed. As a result, it is possible to suppress the increase in size of the housing 11 due to the increase in size of the holder 60.

(3) When the first electric wire 34 and the second electric wire 35 are arranged so as not to overlap with the capacitor 68 when the circuit board 40 is viewed in a plan view, the area and the capacitor in which the first electric wire 34 and the second electric wire 35 are arranged are arranged. The housing 11 becomes large because the areas where the 68s are arranged are different from each other. On the other hand, when the circuit board 40 is viewed in a plan view, a part of the first electric wire 34 and a part of the second electric wire 35 are arranged so as to overlap the capacitor 68, so that the first electric wire 34 and the second electric wire 35 By overlapping a part of the region where the capacitor 68 is arranged and the region where the capacitor 68 is arranged, the size of the housing 11 can be suppressed even if the first electric wire 34 and the second electric wire 35 are arranged in a curved state. Therefore, it is possible to further suppress the increase in size of the housing 11 due to the arrangement of the harness 30.

(4) The holder 60 protrudes from the first surface 61a of the holder main body 61, and has a regulation wall 63 formed on the opposite side of the harness guide 62 with the capacitor 68 in a plan view of the circuit board 40. There is. When a part of the curved portion of the second electric wire 35 comes into contact with the regulation wall 63, the second electric wire 35 is less likely to protrude to the outside than the edge portion of the first surface 61a of the holder body 61. Therefore, it is possible to suppress the increase in size of the housing 11 that may occur by arranging the portion of the second electric wire 35 that protrudes outside the holder body 61. As a result, it is possible to further suppress the increase in size of the housing 11 due to the arrangement of the harness 30.

(5) The first electric wire 34 is curved by the first wall portion 62a and the second wall portion 62b, and the second electric wire 35 is curved by the second wall portion 62b and the third wall portion 62c. Therefore, it is possible to suppress an increase in the size of the housing 11 due to the arrangement of the harness 30 as compared with the case where either the first electric wire 34 or the second electric wire 35 is curved.

(6) The second wall portion 62b serves as the other of the pair of wall portions included in the first guide portion and one of the pair of wall portions included in the second guide portion. Therefore, the number of wall portions can be reduced as compared with the case where one of the pair of wall portions of the second guide portion is provided separately from the other of the pair of wall portions of the first guide portion. Therefore, the configuration of the holder 60 can be simplified.

(7) The dimension of the second wall portion 62b of the harness guide 62 is longer than each of the longitudinal dimension L32 of the first connection terminal 32 and the longitudinal dimension L33 of the second connection terminal 33. Therefore, for example, even if the first connection terminal 32 and the second connection terminal 33 move so as to approach each other due to the vibration of the vehicle, it is possible to prevent the first connection terminal 32 and the second connection terminal 33 from coming into contact with each other. ..

(8) The harness guide 62 connects the first to third wall portions 62a to 62c, and when the circuit board 40 is viewed in a plan view, the harness guide 62 sandwiches the first to third wall portions 62a to 62c on the side opposite to the capacitor 68. It has an arranged connecting wall portion 62d. Therefore, only by arranging the first connection terminal 32 in the portion surrounded by the first wall portion 62a, the second wall portion 62b, and the connecting wall portion 62d, the first electric wire 34 can be arranged in the plan view of the circuit board 40. It can be arranged so as to face the capacitor 68 side. By simply arranging the second connection terminal 33 in the portion surrounded by the second wall portion 62b, the third wall portion 62c, and the connecting wall portion 62d, the second electric wire 35 is placed on the capacitor 68 side in the plan view of the circuit board 40. Can be placed towards.

(9) When the circuit board 40 is viewed in a plan view, the connecting wall portion 62d is located between the peripheral wall 141b of the case body 141 and the first connection terminal 32, and the peripheral wall 141b and the second connection terminal 33 of the case body 141. It is located between. Therefore, the insulation distance between the first connection terminal 32 and the peripheral wall 141b and the insulation distance between the second connection terminal 33 and the peripheral wall 141b can be extended.

This embodiment can be modified and implemented as follows. The present embodiment and modified examples can be implemented in combination with each other within a technically consistent range.
○ The number of electric wires included in the harness 30 may be one or three or more. The number of connection terminals is the same as the number of electric wires. Further, the number of wall portions included in the harness guide 62 may be changed according to the number of electric wires.

○ The electronic component held in the recess 64 of the holder 60 is not limited to the capacitor 68. For example, the coil may be held in the recess 64 as an electronic component held in the holder 60.

○ The shape of the recess 64 of the holder 60 may be appropriately changed as long as the vibration of the electronic component to be held can be suppressed.
○ The connection bolt 22 may be arranged at a position overlapping the recess 64 in the plate thickness direction of the circuit board 40. That is, the connection bolt 22 may be arranged so as to overlap the capacitor 68 in the plate thickness direction of the circuit board 40.

○ In the holder 60, the regulation wall 63 may be omitted.
○ If it is possible to restrict the electric wire from protruding outside the holder body 61, the formation position of the regulation wall 63 in the holder 60 may be changed.

○ In the harness guide 62 of the holder 60, the first wall portion 62a may be omitted. In this case, the first electric wire 34 may be arranged in a straight line. However, the second electric wire 35 is curved by the second wall portion 62b and the third wall portion 62c.

○ In the harness guide 62 of the holder 60, the third wall portion 62c may be omitted. In this case, the second electric wire 35 may be arranged in a straight line. However, the first electric wire 34 is curved by the first wall portion 62a and the second wall portion 62b.

○ In the direction in which the first to third wall portions 62a to 62c extend, the one end portion 65a of the first bus bar 65 may be arranged so as to be offset from the one end portion 66a of the second bus bar 66. That is, the first connection terminal 32 does not have to be located between the connector insertion hole 14h and the second connection terminal 33.

○ The holder 60 may have a pair of wall portions of the second guide portion in addition to the pair of wall portions of the first guide portion. In this case, the pair of wall portions included in the first guide portion are arranged side by side so as to intersect the longitudinal direction of the first connection terminal 32. Further, the shortest distance between the pair of wall portions of the second wall portion is arranged side by side so as to intersect the longitudinal direction of the second connection terminal 33.

○ In the harness guide 62 of the holder 60, the connecting wall portion 62d may be omitted.
○ A part of the first electric wire 34 is arranged so as to overlap the capacitor 68 when the circuit board 40 is viewed in a plan view, whereas the second electric wire 35 is arranged so as to overlap the capacitor 68 when the circuit board 40 is viewed in a plan view. They may be arranged so as not to overlap.

○ A part of the second electric wire 35 is arranged so as to overlap the capacitor 68 when the circuit board 40 is viewed in a plan view, whereas the first electric wire 34 is arranged so as to overlap the capacitor 68 when the circuit board 40 is viewed in a plan view. They may be arranged so as not to overlap.

○ Both the first electric wire 34 and the second electric wire 35 may be arranged so as not to overlap with the capacitor 68 when the circuit board 40 is viewed in a plan view.
○ If the first connection terminal 32 can be connected to the first bus bar 65, the connection structure is not limited to the screwing of the connection bolt 22 with the screw hole 61h of the nut 611. If the second connection terminal 33 can be connected to the second bus bar 66, the connection structure is not limited to the screwing of the connection bolt 22 into the screw hole 61h of the nut 611.

○ If the first bus bar 65 and the first connection terminal 32 are connected, the first connection terminal 32 does not have to be attached to the holder 60. If the second bus bar 66 and the second connection terminal 33 are connected, the second connection terminal 33 may not be attached to the holder 60.

The screw hole 61h into which the connection bolt 22 is screwed may be directly formed in the holder body 61.
○ The case 14 does not have to be aligned in the axial direction of the electric motor 16, the compression unit 17, and the rotating shaft 15. For example, the case 14 may be located outside the motor housing 12 in the radial direction of the rotating shaft 15. In this case, the thickness direction of the circuit board 40 is orthogonal to the axial direction of the rotating shaft 15.

○ The configuration of the housing 11 may be changed as appropriate. For example, the housing 11 may have a bottomed tubular cover connected to the bottom portion 12a of the motor housing 12 instead of the case 14. In this case, the accommodation space S is formed by the bottom portion 12a of the motor housing 12 and the inner surface of the cover.

The connector insertion hole 14h may be formed in the bottom wall 141a of the case body 141 of the case 14, and the circuit board 40 and the holder 60 may be attached to the lid portion 142.
The connector insertion hole 14h may be formed in the lid portion 142 of the case 14, and the circuit board 40 and the holder 60 may be attached to the bottom wall 141a of the case main body 141.

○ The connector insertion hole 14h may be formed in the lid portion 142 of the case 14, and the circuit board 40 and the holder 60 may be attached to the lid portion 142.
○ The protruding direction of the harness 30 from the case 14 may be the direction opposite to that of the electric motor 16 in the axial direction of the rotating shaft 15.

The portion of the harness 30 exposed to the outside of the housing 11 may be changed according to the length of the portion of the harness 30 that is allowed to be exposed to the outside of the housing 11. For example, not only a part of the connector 31, but the whole connector 31 may be exposed to the outside of the housing 11, and in addition to the whole connector 31, a part of the first electric wire 34 and the second electric wire 35 may be exposed to the housing 11. It may be exposed to the outside.

○ The compression unit 17 is not limited to the scroll type, and may be, for example, a piston type or a vane type.
○ The electric compressor 10 constitutes the vehicle air conditioner 100, but the present invention is not limited to this. For example, the electric compressor 10 is mounted on a fuel cell vehicle and is air as a fluid supplied to the fuel cell. May be compressed by the compression unit 17.

10 ... Electric compressor, 11 ... Housing, 14h ... Connector insertion hole as harness insertion hole, 15 ... Rotating shaft, 16 ... Electric motor, 17 ... Compressor, 20 ... Motor drive, 22 ... Connection bolt as bolt, 30 ... Harness, 31 ... Connector, 32 ... First connection terminal as connection terminal, 33 ... Second connection terminal as connection terminal, 34 ... First wire as electric wire, 35 ... Second electric wire as electric wire, 40 ... Circuit board, 60 ... Holder, 61 ... Holder body, 61a ... First surface as outer surface, 62a ... First wall part as wall part, 62b ... Second wall part as wall part, 62c ... First surface as wall part 3 wall parts, 63 ... regulation wall, 65 ... first bus bar as a bus bar, 66 ... second bus bar as a bus bar, 68 ... capacitor as an electronic component, S ... accommodation space.

Claims (6)

The axis of rotation and
An electric motor that rotates the rotating shaft and
A compression unit that compresses the fluid by the rotation of the rotating shaft,
A harness having a connector, a connection terminal, and an electric wire connecting the connector and the connection terminal,
The bus bar to which the connection terminal is connected and
A holder that has a holder body that holds electronic components,
A motor drive unit having a circuit board for driving the electric motor,
A housing having a part of the harness, the holder, and a storage space for accommodating the circuit board inside, and having a harness insertion hole through which the harness is inserted.
With
The circuit board is connected to the bus bar and the electronic component,
The holder
When the circuit board is viewed in a plan view, it is arranged between the harness insertion hole and the circuit board.
A guide portion having a pair of wall portions that protrude from the outer surface of the holder body and are arranged so as to sandwich the connection terminal is provided.
The pair of wall portions are arranged side by side so as to intersect the connection direction of the connection terminal and the electric wire.
An electric compressor characterized in that one of the pair of wall portions is located between the harness insertion hole and the connection terminal. A bolt for connecting the connection terminal to the bus bar and attaching to the holder body is provided.
The electric compressor according to claim 1, wherein the bolts are arranged between the pair of wall portions and arranged so as to be aligned with the electronic components when the circuit board is viewed in a plan view. The electric compressor according to claim 2, wherein a part of the electric wire is arranged so as to overlap the electronic component when the circuit board is viewed in a plan view. The electric compressor according to claim 3, wherein the holder protrudes from the outer surface of the holder body and has a regulation wall located on the opposite side of the electronic component from the side of the electronic component when viewed in a plan view. The connection terminal includes a first connection terminal and a second connection terminal.
The electric wire includes a first electric wire that connects the connector and the first connection terminal, and a second electric wire that connects the connector and the second connection terminal.
Claims 1 to 4, wherein the guide portion includes a first guide portion arranged so as to sandwich the first connection terminal and a second guide portion arranged so as to sandwich the second connection terminal. The electric compressor according to any one item. The first connection terminal is located between the harness insertion hole and the second connection terminal.
The electric compressor according to claim 5, wherein the other of the pair of wall portions of the first guide portion also serves as one of the pair of wall portions of the second guide portion.