Electric oil pump

Abstract

To provide a rotating electric machine and a pump that can reduce the weight while reducing the electromagnetic noise radiated to the outside. [Solution] A rotating electric machine to be mounted on an object, comprising a rotor, a stator, and a housing that houses a circuit board inside. The housing has a main body having an opening on one axial side and a cover member that closes the opening. The cover member has a resin cover main body, a metal shielding member which at least a part of which is embedded and held inside the cover main body and is positioned on one axial side of the circuit board, a first conductive member which is held in the cover main body and is conductive, and a contact member which is held in the cover main body, contacts the object to be mounted and is conductive. The shielding member has an exposed portion which is exposed from the cover main body. The first conductive member is electrically connected to the circuit board and the contact member. The circuit board is electrically connected to the exposed portion.

Description

Technical Field

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[0001] The present invention relates to a rotating electrical machine and a pump.

Background Art

[0002] Measures for reducing electromagnetic noise radiated from a motor are known. For example, Patent Document 1 describes a configuration in which a metal shielding plate covering the outer periphery of a motor is attached.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the motor as described above, since it is necessary to cover the entire outer periphery of the motor with a metal shielding plate, it has been impossible to reduce the size of the shielding plate. Therefore, it has been impossible to reduce the weight of the motor.

[0005] One aspect of the present invention is, in view of the above circumstances, to provide a rotating electrical machine and a pump capable of reducing electromagnetic noise radiated to the outside and achieving weight reduction.

Means for Solving the Problems

[0006] One embodiment of the rotating electric machine of the present invention is a rotating electric machine that is mounted on an object, comprising: a rotor rotatable about a central axis; a stator facing the rotor with a radial gap between them; a circuit board disposed on one axial side of the stator; and a housing that houses the rotor, the stator, and the circuit board. The housing has a main body having an opening on one axial side and a cover member that closes the opening. The cover member has a resin cover body, a metal shielding member which is at least a part of which is embedded and held inside the cover body and disposed on one axial side of the circuit board, a first conductive member which is held in the cover body and is conductive, and a contact member which is held in the cover body, contacts the object to be mounted, and is conductive. The shielding member has an exposed portion which is exposed from the cover body. The first conductive member is electrically connected to the circuit board and the contact member. The circuit board is electrically connected to the exposed portion.

[0007] One embodiment of the pump of the present invention comprises the above-described rotating electric machine and a pump mechanism connected to the above-described rotor. [Effects of the Invention]

[0008] According to one aspect of the present invention, it is possible to reduce the weight of a rotating electric machine and a pump while reducing the electromagnetic noise radiated to the outside. [Brief explanation of the drawing]

[0009] [Figure 1] Figure 1 is a perspective view showing a pump according to one embodiment. [Figure 2] Figure 2 is a cross-sectional view showing a pump according to one embodiment. [Figure 3] Figure 3 is a perspective view showing a cover member and a shielding member according to one embodiment. [Figure 4] Figure 4 is a perspective view showing a part of a pump according to one embodiment. [Figure 5] Figure 5 is a perspective view showing a part of a pump according to one embodiment. [Figure 6] Figure 6 is a cross-sectional view showing the first and second connecting parts of one embodiment. [Modes for carrying out the invention]

[0010] In the following description, the Y-axis will be shown in the figures as appropriate. The Y-axis indicates the direction in which the central axis J of the shaft in the embodiment described below extends. The central axis J shown in each figure is a virtual axis. In the following description, the direction in which the central axis J extends, that is, the direction parallel to the Y-axis, will be called the "axial direction". The radial direction centered on the central axis J will simply be called the "radial direction". The circumferential direction centered on the central axis J will simply be called the "circumferential direction". Of the axial directions, the side in which the Y-axis arrow points (+Y side) will be called the "one axial side". Of the axial directions, the side opposite to the side in which the Y-axis arrow points (-Y side) will be called the "other axial side".

[0011] The circumferential direction is indicated by the arrow θ in each figure. The side of the circumferential direction in which arrow θ points is called the "one circumferential side." The side of the circumferential direction opposite to the side in which arrow θ points is called the "other circumferential side." The one circumferential side is the side that moves clockwise around the central axis J when viewed from the one axial side. The other circumferential side is the side that moves counterclockwise around the central axis J when viewed from the one axial side.

[0012] The pump 1 in this embodiment, shown in Figure 1, is an electric pump attached to equipment mounted on a vehicle. The equipment to which the pump 1 is attached may be an automatic transmission or a drive unit that drives the vehicle's axle. In the following description, the equipment to which the pump 1 is attached will be referred to as the mounting target 5. In this embodiment, the part of the mounting target 5 to which the pump 1 is attached is made of metal. The pump 1 is, for example, an electric oil pump that supplies oil to equipment mounted on a vehicle.

[0013] As shown in Figure 2, the pump 1 comprises a rotating electric machine 2 and a pump mechanism 40. In this embodiment, the rotating electric machine 2 is a motor. The rotating electric machine 2 comprises a housing 10, a rotor 20, a stator 30, a control device 7, and a sealing member 63.

[0014] The housing 10 houses the rotor 20, the stator 30, the control device 7, the sealing member 63, and the pump mechanism 40. The housing 10 has a main body 11, a cover member 12, a pump cover member 17, and a support member 18. The main body 11, the cover member 12, the pump cover member 17, and the support member 18 are separate components. The cover member 12 is located on one axial side of the main body 11. The pump cover member 17 is fixed to the other axial side of the main body 11. The support member 18 is fixed to one axial side of the main body 11. The support member 18 is located on the other axial side of the cover member 12.

[0015] The main body 11 is substantially cylindrical in shape, extending axially with respect to the central axis J. The main body 11 includes an outer cylinder 11a, a pump mechanism housing 11c, an inner cylinder 11d, and a sealing member holding portion 11e. In this embodiment, the outer cylinder 11a, the pump mechanism housing 11c, the inner cylinder 11d, and the sealing member holding portion 11e are all parts of the same single component. In this embodiment, the main body 11 is made of metal.

[0016] The outer cylinder portion 11a of the main body houses the rotor 20, the stator 30, and the sealing member 63. The outer cylinder portion 11a is cylindrical in shape, extending axially around the central axis J. One axial end of the outer cylinder portion 11a is the same as one axial end of the main body portion 11. The other axial end of the outer cylinder portion 11a is connected to one axial end of the pump mechanism housing portion 11c. The outer cylinder portion 11a has an opening 11b at one axial end that opens in the axial direction. A groove is provided on the outer circumferential surface of one axial side of the outer cylinder portion 11a, and an O-ring 68 is fitted into the groove.

[0017] The opening 11b is circular in shape when viewed in the axial direction, with the central axis J at its center. The support member 18 and the cover member 12 are fixed to the opening 11b.

[0018] The pump mechanism housing portion 11c houses the pump mechanism 40 therein. The pump mechanism housing portion 11c is cylindrical with the central axis J as the center and is open on the other axial side. A pump cover member 17 is fixed to the surface of the pump mechanism housing portion 11c facing the other axial side. The opening on the other axial side of the pump mechanism housing portion 11c is blocked by the pump cover member 17.

[0019] The inner cylinder portion 11d of the main body extends axially on one side from the pump mechanism housing portion 11c. The inner cylinder portion 11d of the main body is cylindrical and extends axially with the central axis J as the center. The inner cylinder portion 11d of the main body is disposed inside the outer cylinder portion 11a of the main body. A shaft 23, which will be described later, passes through the inner cylinder portion 11d of the main body. The inner peripheral surface of the inner cylinder portion 11d of the main body contacts the outer peripheral surface of the shaft 23 and supports the shaft 23.

[0020] The sealing member holding portion 11e is provided on one axial side of the inner cylinder portion 11d of the main body. The sealing member holding portion 11e is cylindrical with the central axis J as the center. A sealing member 63 is held inside the sealing member holding portion 11e.

[0021] As shown in FIGS. 1 and 2, the cover member 12 is fixed to one axial side of the main body portion 11. The cover member 12 closes the opening 11b from one axial side. The cover member 12 is substantially cylindrical and extends axially with the central axis J as the center. The cover member 12 houses the control device 7 therein. The cover member 12 surrounds the control device 7 and the support member 18. As shown in FIG. 2, the cover member 12 includes a cover main body portion 13, a shielding member 80, a contact member 83, a first conductive member 85, a positioning pin 92, and caps 65, 66.

[0022] The cover body 13 is substantially cylindrical in shape, extending axially around a central axis J. The cover body 13 surrounds the control device 7 and the support member 18. In this embodiment, the cover body 13 is made of resin. The cover body 13 has a lid portion 13a, a first cylindrical portion 13j, a cylindrical portion 14, a flange portion 15, and a claw portion 16. In this embodiment, the lid portion 13a, the first cylindrical portion 13j, the cylindrical portion 14, the flange portion 15, and the claw portion 16 are all parts of the same single component. In this embodiment, the cover body 13 is manufactured by insert molding, with a shielding member 80, a contact member 83, a first conductive member 85, and a positioning pin 92 as insert members.

[0023] As shown in Figures 2 and 3, the lid portion 13a is substantially disc-shaped with respect to the central axis J. The lid portion 13a is positioned on one axial side of the circuit board 70, which will be described later. As shown in Figure 1, the lid portion 13a has a flat portion 13b, a box-shaped portion 13c, a connector housing portion 13e, and a plurality of ribs 13g.

[0024] As shown in Figures 2 and 3, the planar portion 13b is substantially disc-shaped with respect to the central axis J. The surface of the planar portion 13b faces in the axial direction. The planar portion 13b faces the circuit board 70 in the axial direction. A part of the first shielding portion 81 of the shielding member 80, which will be described later, is embedded in a part of the surface of the planar portion 13b facing the other side in the axial direction. The planar portion 13b holds the first shielding portion 81. A through hole 13f is provided in the planar portion 13b.

[0025] As shown in Figure 3, the recesses 13d are provided on the surface of the flat portion 13b facing the other side in the axial direction. The recesses 13d are provided on the arc-shaped outer edge of the flat portion 13b. The recesses 13d are provided at intervals along the circumferential direction. In this embodiment, three recesses 13d are provided.

[0026] The through-hole 13f is a hole that penetrates the flat portion 13b in the axial direction. Viewed in the axial direction, the through-hole 13f is a roughly rectangular tubular hole. The other axial end of the through-hole 13f connects to the surface of the flat portion 13b facing the other axial direction. The one axial end of the through-hole 13f connects to the surface of the connector housing portion 13e, which will be described later, facing the one axial direction. In other words, the through-hole 13f is a hole that penetrates the flat portion 13b and the connector housing portion 13e in the axial direction. The connector member 72, which will be described later, is arranged inside the through-hole 13f.

[0027] As shown in Figures 2 and 3, the box-shaped portion 13c is a roughly rectangular box shape that protrudes from the planar portion 13b in one axial direction. The box-shaped portion 13c is open on the other axial direction. The interior of the box-shaped portion 13c is connected to the interior of the first cylindrical portion 13j. The central axis J passes through the box-shaped portion 13c. The box-shaped portion 13c has a peripheral wall portion 13h that protrudes from the planar portion 13b in one axial direction, and an upper wall portion 13i located on the axial side of the peripheral wall portion 13h.

[0028] As shown in Figure 1, the connector housing portion 13e protrudes in one axial direction from the surface of the planar portion 13b facing one axial direction. The connector housing portion 13e is a roughly rectangular tube that opens in one axial direction. As described above, the inside of the connector housing portion 13e opens into the inside of the first cylindrical portion 13j through the through hole 13f. The connector member 72 is arranged inside the connector housing portion 13e.

[0029] Multiple ribs 13g protrude from the flat portion 13b in one axial direction. Multiple ribs 13g extend parallel to each other in one direction perpendicular to the axial direction. In the axial direction, one axial end of each rib 13g is positioned at the same location as the axial surface of the upper wall portion 13i. Some of the multiple ribs 13g are connected to the outer circumferential surface of the peripheral wall portion 13h. The rigidity of the resin cover body portion 13 can be increased by providing multiple ribs 13g.

[0030] As shown in Figure 2, the first cylindrical portion 13j is substantially cylindrical in shape, extending axially with respect to the central axis J. The first cylindrical portion 13j surrounds the circuit board 70, the support member 18, and one axial side of the stator 30. The axial end of the first cylindrical portion 13j is connected to the radially outer end of the cover portion 13a. The inner circumferential surface of the other axial side of the first cylindrical portion 13j is fitted into the outer circumferential surface of the main body outer cylindrical portion 11a. This fixes the cover member 12 to the main body portion 11. A stepped surface 13k is provided on the inner circumferential surface of the first cylindrical portion 13j. The stepped surface 13k is the surface facing the other axial side. The stepped surface 13k contacts the surface facing one axial side of the first annular portion 18a of the support member 18, which will be described later. A groove is provided on the outer circumferential surface of the first cylindrical portion 13j, and an O-ring 67 is fitted into the groove. As shown in Figure 3, the first cylindrical portion 13j has a plurality of support portions 13m.

[0031] Multiple support portions 13m are plate-shaped and protrude radially inward from the inner circumferential surface of the first cylindrical portion 13j. The plate surfaces of the support portions 13m face axially. Viewed axially, the support portions 13m are approximately rectangular in shape and extend in the circumferential direction. The support portions 13m are provided at intervals along the circumferential direction. In this embodiment, four support portions 13m are provided. The surface of each support portion 13m facing one side in the axial direction is in contact with the outer edge of the first shielding portion 81 of the shielding member 80, which will be described later. As a result, each support portion 13m supports the shielding member 80 from the other side in the axial direction.

[0032] As shown in Figures 1 and 2, the cylindrical portion 14 is cylindrical with respect to the central axis J. The cylindrical portion 14 is located radially outward from the first cylindrical portion 13j. One portion of the inner circumferential surface of the cylindrical portion 14 on the axial side is connected to the outer circumferential surface of the first cylindrical portion 13j via a number of ribs. As shown in Figure 3, the other portion of the inner circumferential surface of the cylindrical portion 14 on the axial side is directly connected to the outer circumferential surface of the first cylindrical portion 13j.

[0033] As shown in Figures 1 and 2, the flange portion 15 protrudes radially outward from the cylindrical portion 14. Viewed axially, the flange portion 15 has a roughly triangular shape with one corner protruding radially outward. The flange portion 15 is provided with a hole 15d that penetrates axially. A contact member 83, which will be described later, is embedded in the inner circumferential surface of the hole 15d. The flange portions 15 are provided at intervals along the outer circumferential surface of the cylindrical portion 14. In this embodiment, three flange portions 15 are provided. The flange portion 15 has a first flange portion 15a, a second flange portion 15b, and a third flange portion 15c. As shown in Figure 3, the first flange portion 15a is positioned closest to the box-shaped portion 13c among the three flange portions 15. The second flange portion 15b is positioned adjacent to the other circumferential side of the first flange portion 15a. The third flange portion 15c is positioned adjacent to one circumferential side of the first flange portion 15a.

[0034] As shown in Figures 1 and 2, the first flange portion 15a is provided with a first conductive member holding portion 15g. The second flange portion 15b and the third flange portion 15c are not provided with a first conductive member holding portion. Inside the first flange portion 15a, a part of the first conductive member 85 and a positioning pin 92 are embedded and held. The second flange portion 15b and the third flange portion 15c are not embedded or held by the first conductive member or the positioning pin.

[0035] As shown in Figure 1, the first conductive member holder 15g connects the inner circumferential surface of the hole 15d and the outer circumferential surface of the first cylindrical portion 13j. Inside the first conductive member holder 15g, the first conductive member 85, which extends from the first flange portion 15a toward the first cylindrical portion 13j, is held. In other words, the cover body portion 13 holds the first conductive member 85. A cap 66, which will be described later, is fixed to the surface of the first conductive member holder 15g facing one side in the axial direction.

[0036] As shown in Figures 2 and 3, a portion of the positioning pin 92 is embedded inside the first flange portion 15a. The positioning pin 92 is positioned radially inward from the hole portion 15d. One axial portion of the positioning pin 92 is embedded inside the rib of the first flange portion 15a. The other axial portion of the positioning pin 92 protrudes from the first flange portion 15a in the other axial direction and is fitted into the hole portion 5a provided in the mounting object 5. This determines the circumferential and radial position of the pump 1 relative to the mounting object 5.

[0037] The claw portion 16 protrudes from the other axial end of the first cylindrical portion 13j toward the other axial direction. The claw portions 16 are spaced apart along the circumferential direction. In this embodiment, 14 claw portions 16 are provided. The portion of the claw portion 16 toward the other axial direction is curved radially inward. The other axial end of the claw portion 16 engages with a protrusion 11j provided on the outer circumferential surface of the main body outer cylindrical portion 11a. This determines the position of the cover member 12 relative to the main body portion 11 in the axial direction.

[0038] As shown in Figure 1, the cap 65 is provided on the lid portion 13a facing one axial side. The cap 65 is fixed to the hole 13n. The cap 65 closes the hole 13n from one axial side. In this embodiment, five caps 65 are provided. Three caps 65 are provided on the upper wall portion 13i facing one axial side. Although not shown, two caps 65 are provided on the flat portion 13b facing one axial side. The hole 13n extends from the lid portion 13a facing one axial side to the other axial side and reaches the shielding member 80, which will be described later. As described above, the cover body portion 13 is made by insert molding, with the shielding member 80 and the like as insert members. The shielding member 80 is held in the mold by the mold's retaining pins during the molding of the cover member 12. The hole 13n is the part through which the retaining pins passed. The cap 65 blocks the hole 13n, thereby preventing foreign matter such as oil and dust from entering the inside of the hole 13n.

[0039] The cap 66 is provided on the surface of the first flange portion 15a facing one axial side. The cap 66 is fixed to the hole 13p. The cap 66 closes the hole 13p from one axial side. In this embodiment, two caps 66 are provided. The hole 13p extends from the surface of the first flange portion 15a facing one axial side to the other axial side, reaching the first conductive member 85. The hole 13p is the part through which the mold holding pin that holds the first conductive member 85 in the mold during the molding of the cover body portion 13 passed. By closing the hole 13p with the cap 66, it is possible to prevent foreign matter such as oil and dust from entering the inside of the hole 13p.

[0040] As shown in Figures 1 and 2, the pump cover member 17 is fixed to the other axial side of the pump mechanism housing 11c by bolts. The pump cover member 17 has an intake hole 17a and a discharge hole 17c. The intake hole 17a is a hole that connects the inside of the pump mechanism housing 11c to the other axial end of the pump cover member 17. Oil is drawn into the inside of the pump mechanism housing 11c through the intake hole 17a. The discharge hole 17c is a hole that penetrates the pump cover member 17 in the axial direction. The pump 1 discharges oil to the outside through the discharge hole 17c. A groove is provided on the outer circumferential surface of the pump cover member 17, and an O-ring 69 is fitted into the groove.

[0041] As shown in Figures 2 and 5, the support member 18 supports the circuit board 70 from the other axial side. The support member 18 is substantially cylindrical with a central axis J. The support member 18 is located on one axial side of the stator 30. The support member 18 is located on the other axial side of the circuit board 70. The support member 18 is located inside the main body outer cylinder portion 11a. The support member 18 surrounds one axial end of the shaft 23. The support member 18 is fixed to the opening 11b of the main body outer cylinder portion 11a. A part of the second conductive member 86, which will be described later, is embedded inside the support member 18. The support member 18 holds the second conductive member 86. The support member 18 is made of resin. The support member 18 is made by insert molding with the second conductive member 86 as the insert member. The support member 18 has a first annular portion 18a, a second cylindrical portion 18b, and a second annular portion 18c. The first annular portion 18a, the second cylindrical portion 18b, and the second annular portion 18c are all parts of the same single member.

[0042] The second cylindrical portion 18b is cylindrical with respect to the central axis J. Ribs 18h are provided on the outer circumferential surface of the second cylindrical portion 18b. The ribs 18h protrude radially outward from the outer circumferential surface of the second cylindrical portion 18b and extend axially. The ribs 18h are provided at equal intervals along the circumferential direction. In this embodiment, six ribs 18h are provided. The radially outward-facing surface of each rib 18h is fitted into the inner circumferential surface of the main body outer cylindrical portion 11a. As a result, the support member 18 is fixed to the main body portion 11.

[0043] The first annular portion 18a is an annular plate shape centered on the central axis J. The first annular portion 18a protrudes radially outward from one axial end of the second cylindrical portion 18b. The plate surface of the first annular portion 18a faces axially. The surface of the first annular portion 18a facing one axial side is in contact with the stepped surface 13k of the cover member 12. The surface of the first annular portion 18a facing the other axial side is in contact with one axial end of the main body outer cylindrical portion 11a. These conditions determine the position of the support member 18 in the axial direction. A part of the second conductive member 86, which will be described later, is embedded inside the first annular portion 18a.

[0044] The second annular portion 18c is an annular plate shape centered on the central axis J. The second annular portion 18c surrounds one axial end of the shaft 23. The plate surface of the second annular portion 18c is oriented axially. The radially outer end of the second annular portion 18c is connected to the other axial end of the second cylindrical portion 18b. The second annular portion 18c has a hole 18d and a projection 18e. The hole 18d is a circular hole centered on the central axis J. The hole 18d penetrates the second annular portion 18c in the axial direction. The shaft 23 passes through the hole 18d.

[0045] As shown in Figure 5, the projection 18e is cylindrical, extending from the second annular portion 18c in one axial direction. The projections 18e are spaced apart along the circumferential direction. In this embodiment, three projections 18e are provided. Each projection 18e has a first portion 18f and a second portion 18g. Each first portion 18f is cylindrical, extending from the second annular portion 18c in one axial direction. Each second portion 18g is cylindrical, extending from the first portion 18f in one axial direction. The outer diameter of each second portion 18g is smaller than the outer diameter of each first portion 18f. The surface of each first portion 18f facing one axial direction contacts the surface of the circuit board 70 facing the other axial direction, thereby supporting the circuit board 70. This determines the position of the circuit board 70 in the axial direction. Each second portion 18g is passed through a hole 70a provided in the circuit board 70. One axial side of each second portion 18g is melted and spreads out. This fixes the support member 18 and the circuit board 70.

[0046] As shown in Figure 2, the rotor 20 is rotatable about a central axis J. The rotor 20 includes a rotor core 21, a magnet 22, and a shaft 23. The shaft 23 and the magnet 22 are fixed to the rotor core 21. The rotor 20 is rotatably supported about the central axis J by an inner cylinder portion 11d of the main body that supports the shaft 23. The shaft 23 is cylindrical and extends axially about the central axis J. The shaft 23 is arranged to straddle the inside of the outer cylinder portion 11a of the main body and the inside of the pump mechanism housing portion 11c.

[0047] The stator 30 faces the rotor 20 with a gap in between. The stator 30 is located radially outward from the rotor 20. The stator 30 has a stator core 31, an insulator (not shown), and a plurality of coils 32. The stator 30 is fixed to the inner circumferential surface of the main body outer cylinder portion 11a. The plurality of coils 32 are connected to a circuit board 70 via busbars (not shown). Current is supplied to the plurality of coils 32 via the circuit board 70.

[0048] The sealing member 63 is held on the inner circumferential surface of the sealing member holding portion 11e. The sealing member 63 is positioned on the other axial side of the rotor core 21. In this embodiment, the sealing member 63 is a lip seal having a lip portion on the radially inward side. The lip portion of the sealing member 63 is in contact with the outer circumferential surface of the shaft 23. As a result, the sealing member 63 seals the space between the shaft 23 and the main body portion 11.

[0049] As shown in Figure 2, the pump mechanism 40 is housed inside the pump mechanism housing 11c. The pump mechanism 40 has an inner rotor 41 and an outer rotor 42. The inner rotor 41 is connected to the portion of the shaft 23 that protrudes into the pump mechanism housing 11c. In this way, the pump mechanism 40 is connected to the rotor 20. The inner rotor 41 is an annular shape that surrounds the shaft 23. The outer rotor 42 is an annular shape that surrounds the inner rotor 41. The inner rotor 41 and the outer rotor 42 are meshed with each other. Therefore, when the inner rotor 41 is rotated by the rotor 20, the outer rotor 42 also rotates.

[0050] The control device 7 is electrically connected to the multiple coils 32. The control device 7 controls the current supplied to the multiple coils 32. The control device 7 is positioned on one axial side of the stator 30. The control device 7 is positioned on the other axial side of the cover member 12 and the shielding member 80, which will be described later. As shown in Figure 4, the control device 7 has a circuit board 70, multiple electronic components 71, a connector member 72, a connection terminal 87, and a heat transfer member 90. In other words, the rotating electric machine 2 is equipped with multiple electronic components 71, a connection terminal 87, and a heat transfer member 90.

[0051] The circuit board 70 is roughly annular in shape with a central axis J at its center. The circuit board 70 is positioned on one side of the stator 30 in the axial direction. As shown in Figures 2 and 4, the surface of the circuit board 70 faces axially. Multiple electronic components 71, a connector member 72, a connection terminal 87, and a heat transfer member 90 are attached to the circuit board 70.

[0052] Multiple electronic components 71 are attached to the circuit board 70. Multiple electronic components 71 are fixed to the circuit board 70 by soldering or the like. Multiple electronic components 71 include a first electronic component 71a and a second electronic component 71b. In this embodiment, the first electronic component 71a is an electronic component such as a capacitor. The first electronic component 71a is fixed to the surface of the circuit board 70 facing one side in the axial direction. Viewed in the axial direction, the first electronic component 71a is arranged overlapping the upper wall portion 13i of the cover member 12 and the top wall portion 82b of the shielding member 80, which will be described later. The first electronic component 71a is arranged inside the box-shaped portion 13c of the cover member 12 and the second shielding portion 82 of the shielding member 80, which will be described later. In this embodiment, the second electronic component 71b is an electronic component such as a transistor. The second electronic component 71b is fixed to the surface of the circuit board 70 facing the other side in the axial direction. Viewed in the axial direction, the second electronic component 71b overlaps with the planar portion 13b of the cover member 12 and the first shielding portion 81 of the shielding member 80, which will be described later. In this embodiment, the first electronic component 71a has a larger axial dimension than the second electronic component 71b. The first electronic component 71a can be any electronic component that has the largest axial dimension among those provided on the surface of the circuit board 70 facing one axial side. Similarly, the second electronic component 71b can be any electronic component that has the largest axial dimension among those provided on the surface of the circuit board 70 facing the other axial side.

[0053] In this embodiment, it has been described that one first electronic component 71a is placed on the surface of the circuit board 70 facing one axial side, and one second electronic component 71b is placed on the surface of the circuit board 70 facing the other axial side. However, in addition to the first electronic component 71a, another electronic component having a smaller axial dimension than the first electronic component 71a may be placed on the surface of the circuit board 70 facing one axial side. Similarly, in addition to the second electronic component 71b, another electronic component having a smaller axial dimension than the second electronic component 71b may be placed on the surface of the circuit board 70 facing the other axial side.

[0054] The connector member 72 electrically connects the circuit board 70 to an external device (not shown) that supplies power to the rotating electric machine 2. As shown in Figures 1 and 4, the connector member 72 is mounted on one axial side of the circuit board 70. The connector member 72 protrudes to one axial side. In the axial direction, the axial end of the connector member 72 is located to one axial side further than the axial end of the first electronic component 71a. The axial portion of the connector member 72 is located inside the connector housing portion 13e of the cover member 12.

[0055] As shown in Figure 4, the connector 87 is attached to a surface of the circuit board 70 facing one axial direction. The connector 87 is an elastic leaf spring. In this embodiment, the connector 87 is made of metal. The connector 87 contacts the circuit board 70 and the exposed portion 81d of the shielding member 80, which will be described later. The connector 87 is electrically connected to the ground portion of the circuit board 70. This electrically connects the circuit board 70 and the shielding member 80.

[0056] As shown in Figures 2 and 4, the heat transfer member 90 is mounted on the surface of the circuit board 70 facing one axial direction. The heat transfer member 90 is substantially rectangular in shape. The surface of the heat transfer member 90 facing the other axial direction contacts the surface of the circuit board 70 facing one axial direction. The surface of the heat transfer member 90 facing the other axial direction contacts the exposed portion 81d of the shielding member 80, which will be described later. In this embodiment, when viewed in the axial direction, the heat transfer member 90 overlaps with the second electronic component 71b. As described above, the second electronic component 71b is an electronic component such as a transistor. When the rotating electric machine 2 is driven, the amount of heat generated from the transistor is large compared to the amount of heat generated from other electronic components. Therefore, according to this embodiment, the heat generated in the second electronic component 71b, such as the transistor, can be efficiently transferred to the shielding member 80 via the heat transfer member 90.

[0057] The shielding member 80 shields electromagnetic noise radiated from the control device 7 and reduces electromagnetic noise radiated to the outside of the rotating electric machine 2 and the pump 1. As shown in Figure 2, the shielding member 80 is positioned on one axial side of the control device 7. At least a portion of the shielding member 80 is embedded and held inside the cover body 13. As described above, the shielding member 80 is embedded and held inside the cover body 13 by insert molding, with the shielding member 80 and the like as the insert member. The shielding member 80 is made of metal. In this embodiment, the shielding member 80 is made of ferritic stainless steel. The material constituting the shielding member 80 is not limited to the material of this embodiment, and various materials such as silicon steel can be used. In this embodiment, the shielding member 80 is plate-shaped.

[0058] As shown in Figure 3, the first shielding portion 81 is the part of the shielding member 80 that is embedded in the planar portion 13b of the cover body 13. The first shielding portion 81 is approximately semicircular in shape. The plate surface of the first shielding portion 81 faces in the axial direction. The surface of the first shielding portion facing one side in the axial direction is embedded inside the cover body 13. In this embodiment, approximately half of the first shielding portion 81 on one side in the axial direction is embedded inside the cover body 13. Approximately half of the first shielding portion 81 on the other side in the axial direction constitutes an exposed portion 81d that is exposed on the other side in the axial direction from the cover body 13. In other words, the shielding member 80 has an exposed portion 81d that is exposed from the cover body 13. As shown in Figure 4, the surface of the first shielding portion 81 facing the other side in the axial direction faces the circuit board 70. As shown in Figure 2, when viewed in the axial direction, the first shielding portion 81 overlaps with the second electronic component 71b. In the axial direction, the first shielding portion 81 is positioned with a small gap between it and the circuit board 70. As a result, in the axial direction, the first shielding portion 81 is positioned relatively close to the second electronic component 71b. As shown in Figure 3, the first shielding portion 81 has a base portion 81a, a first protrusion portion 81b, and a second protrusion portion 81c. The base portion 81a, the first protrusion portion 81b, and the second protrusion portion 81c are all parts of the same single component.

[0059] The base portion 81a is a substantially semicircular part of the first shielding portion 81. The arc-shaped outer edge of the base portion 81a is supported from the other axial side by the support portion 13m of the cover body portion 13. Furthermore, between adjacent support portions 13m, a portion of the arc-shaped outer edge of the base portion 81a is recessed radially inward, and is located radially inward from the recess 13d. As shown in Figure 4, the surface of the base portion 81a facing the other axial side is in contact with the heat transfer member 90. That is, the heat transfer member 90 is in contact with the exposed portion 81d.

[0060] As shown in Figure 3, the first protrusion 81b is embedded in and held in the circumferential portion of the box-shaped portion 13c of the flat portion 13b. Viewed in the axial direction, the first protrusion 81b is substantially rectangular in shape. The first protrusion 81b protrudes from the base portion 81a. Although not shown in the illustration, the surface of the first protrusion 81b facing the other axial side is in contact with the heat transfer member 90. That is, the heat transfer member 90 is in contact with the exposed portion 81d. According to this embodiment, as described above, the heat transfer member 90 can efficiently transfer heat generated in the second electronic component 71b, such as a transistor, to the shielding member 80. The heat transferred to the shielding member 80 is dissipated to the outside of the rotating electric machine 2 via the cover body portion 13. Therefore, the heat dissipation performance of the control device 7 can be improved.

[0061] The second protrusion 81c is embedded and held in the portion of the flat portion 13b that is on the other side in the circumferential direction from the box-shaped portion 13c. Viewed in the axial direction, the second protrusion 81c is substantially rectangular in shape. The second protrusion 81c protrudes from the base portion 81a. As shown in Figure 4, the surface of the second protrusion 81c facing the other side in the axial direction is in contact with the connection terminal 87. As a result, the exposed portion 81d is electrically connected to the circuit board 70 via the connection terminal 87. The exposed portion 81d is electrically connected to the ground portion of the circuit board 70. Therefore, according to this embodiment, in the assembly work of the rotating electric machine 2 and the pump 1, the shielding member 80 and the circuit board 70 can be electrically connected via the connection terminal 87 by fixing the cover member 12 to the main body portion 11, to which the control device 7 is fixed via the support member 18 in advance. Therefore, compared to the case where the shielding member 80 and the circuit board 70 are electrically connected by a process such as soldering, for example, the shielding member 80 and the circuit board 70 can be electrically connected more easily. Consequently, an increase in the assembly man-hours for the rotating electric machine 2 and the pump 1 can be suppressed.

[0062] As shown in Figure 3, the second shielding portion 82 is embedded and held in each inner surface of the box-shaped portion 13c of the cover body portion 13. The second shielding portion 82 is a roughly rectangular box shape that extends from the first shielding portion 81 in one axial direction. The second shielding portion 82 has a side wall portion 82a and a top wall portion 82b. The side wall portion 82a and the top wall portion 82b are parts of the same single member. In this embodiment, in the thickness direction, approximately half of the side wall portion 82a and the top wall portion 82b on each inner surface of the box-shaped portion 13c are embedded inside the cover body portion 13. Therefore, in the thickness direction, approximately half of the side wall portion 82a and the top wall portion 82b on the opposite side of each inner surface of the box-shaped portion 13c are exposed to the outside of the cover body portion 13. Alternatively, the entire second shielding portion 82 may be embedded inside the cover body portion 13.

[0063] The side wall portion 82a is embedded and held inside the peripheral wall portion 13h of the box-shaped portion 13c. The side wall portion 82a is a substantially square cylindrical shape that protrudes from the first shielding portion 81 in one axial direction. A portion of the other axial end of the side wall portion 82a is connected to a portion of the straight edge of the base portion 81a. The other axial end of the side wall portion 82a is connected to the top wall portion 82b. As shown in Figures 2 and 4, the side wall portion 82a surrounds the first electronic component 71a. In other words, the shielding member 80 has a side wall portion 82a that surrounds the first electronic component 71a.

[0064] As shown in Figures 2 and 3, the top wall portion 82b is embedded and held inside the upper wall portion 13i of the box-shaped portion 13c. The top wall portion 82b is a roughly square plate when viewed in the axial direction. The plate surface of the top wall portion 82b is oriented in the axial direction. The top wall portion 82b is positioned on one side in the axial direction of the first electronic component 71a. When viewed in the axial direction, the top wall portion 82b overlaps with the first electronic component 71a. As described above, when viewed in the axial direction, the first shielding portion 81 overlaps with the second electronic component 71b. In other words, when viewed in the axial direction, multiple electronic components 71 and the shielding member 80 overlap. Furthermore, the top wall portion 82b is positioned on one side in the axial direction of the first electronic component 71a, and relatively close to the first electronic component 71a.

[0065] As shown in Figure 1, in this embodiment, the cover member 12 has a contact member 83. A part of the contact member 83 is embedded in the hole 15d. As a result, the contact member 83 is held in place by the cover body 13. As described above, the contact member 83 is embedded inside the cover body 13 by insert molding, with the contact member 83 and the like as the insert member. The contact member 83 is conductive. In this embodiment, the contact member 83 is made of metal.

[0066] As shown in Figures 2 and 4, the contact member 83 is substantially cylindrical in shape and extends in the axial direction. The contact member 83 is provided with a through hole 83d that penetrates in the axial direction. A bolt 93 is passed through the through hole 83d from one side in the axial direction. The bolt 93 is tightened into a screw hole provided on the surface of the mounting object 5 facing one side in the axial direction. In this way, the rotating electric machine 2 and the pump 1 are fixed to the mounting object 5 via the contact member 83. The contact member 83 has a first cylindrical portion 83h, a second cylindrical portion 83i, and a third cylindrical portion 83j. The first cylindrical portion 83h, the second cylindrical portion 83i, and the third cylindrical portion 83j are all parts of the same single member.

[0067] The first cylindrical portion 83h is cylindrical in shape and extends in the axial direction. The first cylindrical portion 83h is positioned inside the flange portion 15. Multiple grooves 83k are provided on the outer circumferential surface of the first cylindrical portion 83h. Each of the multiple grooves 83k extends in the axial direction. The multiple grooves 83k are provided along the circumferential direction on the outer circumferential surface of the first cylindrical portion 83h, on one axial side and the other axial side. Part of the resin that constitutes the flange portion 15 is filled into the multiple grooves 83k. This prevents the contact member 83 from rotating in the circumferential direction relative to the flange portion 15.

[0068] The second cylindrical portion 83i is cylindrical in shape and protrudes from the first cylindrical portion 83h in the other axial direction. The outer diameter of the second cylindrical portion 83i is smaller than the outer diameter of the first cylindrical portion 83h. The outer circumferential surface of the second cylindrical portion 83i is located inside the flange portion 15. In the axial direction, the surface of the second cylindrical portion 83i facing the other axial direction is located at the same position as the surface of the flange portion 15 facing the other axial direction and is exposed to the outside. The surface of the second cylindrical portion 83i facing the other axial direction contacts the mounting object 5. In other words, the cover member 12 is held by the cover body portion 13, contacts the mounting object 5, and has a conductive contact member 83.

[0069] The third cylindrical portion 83j is cylindrical and protrudes from the first cylindrical portion 83h in one axial direction. The outer diameter of the third cylindrical portion 83j is smaller than the outer diameter of the first cylindrical portion 83h. The outer circumferential surface of the third cylindrical portion 83j is located inside the flange portion 15. The third cylindrical portion 83j of the contact member 83 held by the first flange portion 15a is press-fitted into the first fixing portion 85a of the first conductive member 85, which will be described later. The first fixing portion 85a of the first conductive member 85 is not press-fitted into the third cylindrical portion 83j of the contact member 83 held by the second flange portion 15b and the third flange portion 15c. The axial side surface of the third cylindrical portion 83j is located in the same position as the axial side surface of the flange portion 15 and is exposed to the outside. As shown in Figure 2, the outer diameter of the head 93a of the bolt 93 is smaller than the outer diameter of the third cylindrical portion 83j. Therefore, the head portion 93a contacts only the third cylindrical portion 83j and not the flange portion 15. As a result, the contact member 83 is fixed to the mounting object 5.

[0070] As shown in Figures 1 and 4, the first conductive member 85 electrically connects the contact member 83, which is held in the first flange portion 15a, to the second conductive member 86, which will be described later. The first conductive member 85 extends from the first flange portion 15a toward the first cylindrical portion 13j. A part of the first conductive member 85 is embedded and held inside the cover body portion 13. As described above, the first conductive member 85 is held in the cover body portion 13 by insert molding, in which the first conductive member 85 and the like are used as insert members. The first conductive member 85 is conductive. In this embodiment, the first conductive member 85 is made of metal. The first conductive member 85 has a first fixing portion 85a, a first relay portion 85b, and a first connecting portion 85c. The first fixing portion 85a, the first relay portion 85b, and the first connecting portion 85c are all parts of the same single member.

[0071] The first fixing portion 85a is annular in shape. The first fixing portion 85a is provided at one end of the first conductive member 85. The inner circumferential surface of the first fixing portion 85a is in contact with the outer circumferential surface of the third cylindrical portion 83j of the contact member 83. The third cylindrical portion 83j is press-fitted into the first fixing portion 85a. In other words, the first conductive member 85 is fixed to the contact member 83. As a result, the first conductive member 85 is electrically connected to the contact member 83. The first fixing portion 85a is embedded inside the cover body portion 13. In other words, the first fixing portion 85a and the contact member 83 are fixed inside the cover body portion 13. The first conductive member 85 and the contact member 83 are insert-molded after being press-fitted and fixed to each other.

[0072] The first relay portion 85b connects the first fixing portion 85a and the first connecting portion 85c. The first relay portion 85b is plate-shaped and extends from the first flange portion 15a toward the first cylindrical portion 13j. A part of the first relay portion 85b is located inside the first conductive member holding portion 15g of the cover body portion 13. One end of the first relay portion 85b is connected to the outer circumferential surface of the first fixing portion 85a. As shown in Figure 6, the other end of the first relay portion 85b protrudes radially inward from the inner circumferential surface of the first cylindrical portion 13j. In the axial direction, the other end of the first relay portion 85b is located between the stepped surface 13k of the first cylindrical portion 13j and the surface of the first annular portion 18a of the support member 18 that faces one side in the axial direction. The other end of the first relay portion 85b is connected to the first connecting portion 85c.

[0073] As shown in Figures 4 and 6, the first connecting portion 85c is a substantially rectangular plate extending in the circumferential direction. The plate surface of the first connecting portion 85c faces axially. The first connecting portion 85c is provided at the other end of the first conductive member 85. In the axial direction, the first connecting portion 85c is positioned between the stepped surface 13k and the surface of the first annular portion 18a facing one axial side. In other words, the first connecting portion 85c is exposed from the cover body portion 13. The surface of the first connecting portion 85c facing one axial side is in contact with the stepped surface 13k. The surface of the first connecting portion 85c facing the other axial side is in contact with the surface of the second connecting portion 86c of the second conductive member 86, which will be described later, facing one axial side. As shown in Figure 4, in this embodiment, the width of the first connecting portion 85c is greater than the width of the first relay portion 85b. In this embodiment, the width of the first conductive member 85 is the dimension of the first conductive member 85 in a direction perpendicular to the direction in which the first conductive member 85 extends, when viewed in the axial direction. In this embodiment, the width of the first relay portion 85b is the dimension of the first relay portion 85b in a direction perpendicular to the direction in which the first relay portion 85b extends from the contact member 83 toward the second conductive member 86, when viewed in the axial direction. The width of the first connecting portion 85c is the circumferential dimension of the first connecting portion 85c.

[0074] As shown in Figures 4 and 5, the rotating electric machine 2 includes a second conductive member 86. The second conductive member 86 electrically connects the circuit board 70 and the first conductive member 85. The second conductive member 86 extends from the circuit board 70 toward the first conductive member 85. A portion of the second conductive member 86 is embedded and held inside the support member 18. As described above, the second conductive member 86 is held in the support member 18 by insert molding, in which the second conductive member 86 is used as the insert member. The second conductive member 86 is conductive. In this embodiment, the second conductive member 86 is made of metal. The second conductive member 86 has a second fixed portion 86a, a second relay portion 86b, and a second connecting portion 86c. The second fixed portion 86a, the second relay portion 86b, and the second connecting portion 86c are all parts of the same single member.

[0075] The second fixing portion 86a is plate-shaped and extends in the axial direction. The second fixing portion 86a is provided at one end of the second conductive member 86. The second fixing portion 86a is positioned outside the support member 18. One axial end of the second fixing portion 86a is pin-shaped. This axial end of the second fixing portion 86a is passed through a hole that penetrates the circuit board 70 in the axial direction and is connected to the ground portion of the circuit board 70. In this embodiment, the second fixing portion 86a and the circuit board 70 are fixed by soldering. As a result, the second conductive member 86 is electrically connected to the circuit board 70. In other words, the rotating electric machine 2 includes a second conductive member 86 that is connected to the circuit board 70. Viewed radially, the other axial end of the second fixing portion 86a overlaps with the first annular portion 18a of the support member 18.

[0076] The second relay section 86b connects the second fixed section 86a and the second connecting section 86c. The second relay section 86b is plate-shaped and extends substantially in the circumferential direction. The plate surface of the second relay section 86b faces axially. A portion of the second relay section 86b is embedded inside the first annular section 18a. One end of the second relay section 86b is connected to the other axial end of the second fixed section 86a outside the first annular section 18a. Inside the first annular section 18a, the second relay section 86b extends substantially in one direction circumferentially from the other axial end of the second fixed section 86a. As shown in Figure 6, the other end of the second relay section 86b bends to one axial side and connects to the second connecting section 86c on one axial side of the first annular section 18a. The other end of the second relay section 86b is located between the stepped surface 13k and the surface of the first annular section 18a facing one side in the axial direction.

[0077] As shown in Figures 4 and 5, the second connecting portion 86c is a substantially rectangular plate extending in the circumferential direction. The plate surface of the second connecting portion 86c is oriented in the axial direction. The second connecting portion 86c is provided at the other end of the second conductive member 86. As shown in Figure 6, the second connecting portion 86c is positioned between the stepped surface 13k and the surface of the first annular portion 18a facing one side in the axial direction. The second connecting portion 86c is exposed from the support member 18. The surface of the second connecting portion 86c facing one side in the axial direction is in contact with the surface of the first connecting portion 85c facing the other side in the axial direction. In other words, the second connecting portion 86c and the first connecting portion 85c are in contact. As a result, the second conductive member 86 and the first conductive member 85 are electrically connected. Therefore, the first conductive member 85 is electrically connected to the circuit board 70 and the contact member 83. Therefore, the shielding member 80 and the circuit board 70 are electrically connected to the mounting target 5 via the connection terminal 87, the second conductive member 86, the first conductive member 85, and the contact member 83. In other words, the shielding member 80 and the circuit board 70 are grounded. According to this embodiment, the first conductive member 85 is held by the cover member 12, and the second conductive member 86 is held by the support member 18. Therefore, by attaching the cover member 12 to the main body 11, to which the support member 18 is fixed in advance, from one axial side, the first connection portion 85c of the first conductive member 85 held by the cover main body 13 and the second connection portion 86c of the second conductive member 86, which is pre-connected to the circuit board 70 and held by the support member 18, can be brought into contact. Therefore, the ease of assembly of the rotating electric machine 2 and the pump 1 can be improved.

[0078] In this embodiment, the width of the second connection portion 86c is greater than the width of the second relay portion 86b. In this embodiment, the width of the second relay portion 86b is the dimension in the direction perpendicular to the direction in which the second relay portion 86b extends from the second fixing portion 86a toward the second connection portion 86c. The width of the second connection portion 86c is the dimension in the circumferential direction. Also, in this embodiment, as described above, the width of the first connection portion 85c is greater than the width of the first relay portion 85b. Therefore, even if there is variation in the circumferential position of the first conductive member 85 relative to the cover body portion 13, and variation in the circumferential position of the second conductive member 86 relative to the support member 18, the first connection portion 85c and the second connection portion 86c can be stably brought into contact. Therefore, the first conductive member 85 and the second conductive member 86 can be stably electrically connected by the process of attaching the cover member 12 from one axial side to the main body portion 11 to which the support member 18 has been fixed in advance. Therefore, the ease of assembly of the rotating electric machine 2 and the pump 1 can be further improved.

[0079] According to this embodiment, the cover member 12 includes a resin cover body 13, a metal shielding member 80 which is embedded and held inside the cover body 13 in at least a portion and positioned on one axial side of the circuit board 70, a conductive first conductive member 85 which is held in the cover body 13 and has conductivity, and a conductive contact member 83 which is held in the cover body 13 and has conductivity and contacts the mounting target 5. The shielding member 80 has an exposed portion 81d which is exposed from the cover body 13. The first conductive member 85 is electrically connected to the circuit board 70 and the contact member 83, and the circuit board 70 is electrically connected to the exposed portion 81d. That is, since the cover body 13 is made of resin, the weight of the cover member 12 can be reduced. In addition, the shielding member 80 can be grounded via the contact member 83, the first conductive member 85, and the circuit board 70. Therefore, the shielding member 80 can shield at least a portion of the electromagnetic noise radiated from the control device 7 in one axial direction. As a result, even if the cover body 13 is made of resin, the shielding member 80 can reduce the electromagnetic noise radiated to the outside from the rotating electric machine 2 and the pump 1.

[0080] In this embodiment, by embedding and holding the shielding member 80 in the cover body 13, the shielding member 80 can be easily positioned in a suitable location relative to the circuit board 70 by assembling the cover member 12 to the body 11. This makes it easier to position the shielding member 80 appropriately in the area necessary to effectively shield electromagnetic noise, and to make the shape of the shielding member 80 the minimum necessary shape to suppress electromagnetic noise. Therefore, it is possible to suppress the enlargement of the shielding member 80 and further reduce the weight of the cover member 12. Accordingly, according to this embodiment, it is possible to reduce the weight of the rotating electric machine 2 and the pump 1 while reducing the electromagnetic noise radiated to the outside from the rotating electric machine 2 and the pump 1.

[0081] In this embodiment, the main body portion 11 of the housing 10, which is located on the other axial side of the circuit board 70, is made of metal. Therefore, at least a portion of the electromagnetic noise radiated from the control device 7 in the other axial direction is shielded by the main body portion 11, thereby further reducing the electromagnetic noise radiated to the outside from the rotating electric machine 2 and the pump 1.

[0082] Furthermore, according to this embodiment, since the shielding member 80 is embedded and held inside the cover body 13, the shielding member 80 can be positioned on one axial side of the control device 7 by the process of attaching the cover member 12 to the body 11. This improves the ease of assembly of the rotating electric machine 2 and the pump 1. In addition, it is possible to prevent forgetting to install the shielding member 80 during the manufacturing process of the rotating electric machine 2 and the pump 1. This further improves the ease of assembly of the rotating electric machine 2 and the pump 1.

[0083] Furthermore, according to this embodiment, the shielding member 80 is connected to the first conductive member 85 via the circuit board 70. Therefore, the shape of the shielding member 80 can be simplified. For example, if the shielding member 80 and the first conductive member 85 were directly connected, the shielding member 80 would need to be provided to a position where it can be connected to the first conductive member 85. In this case, the shape of the shielding member 80 would become complex, making it difficult to insert-molde the cover member 12 using the shielding member 80 as an insert member. However, in this embodiment, as described above, the shape of the shielding member 80 can be simplified, so the cover member 12 can be easily insert-molded using the shielding member 80 as an insert member. Therefore, an increase in the manufacturing man-hours for the rotating electric machine 2 can be suppressed.

[0084] According to this embodiment, the shielding member 80 is plate-shaped. Therefore, the weight of the shielding member 80 can be reduced. Consequently, the weight of the rotating electric machine 2 and the pump 1 can be reduced. Furthermore, since the shielding member 80 can be constructed by press forming, an increase in the manufacturing cost of the shielding member 80 can be suppressed. Consequently, an increase in the manufacturing cost of the rotating electric machine 2 and the pump 1 can be suppressed.

[0085] In this embodiment, the first fixing portion 85a is annular, and the contact member 83 is cylindrical and press-fitted into the first fixing portion 85a. Therefore, the first conductive member 85 and the contact member 83 can be firmly fixed together. Consequently, the circuit board 70 and the shielding member 80 can be stably grounded. Thus, electromagnetic noise radiated to the outside from the rotating electric machine 2 and the pump 1 can be effectively reduced.

[0086] In this embodiment, the first fixing portion 85a and a part of the contact member 83 are each embedded inside the cover body 13, and the first fixing portion 85a and the contact member 83 are fixed inside the cover body 13. In other words, the area around the part in which the first fixing portion 85a and the contact member 83 are fixed is covered with the resin that makes up the cover body 13. Therefore, the first fixing portion 85a and the contact member 83 are less likely to come apart from each other, and the first conductive member 85 and the contact member 83 can be fixed more firmly. Consequently, the circuit board 70 and the shielding member 80 can be grounded more stably. Thus, electromagnetic noise radiated to the outside from the rotating electric machine 2 and the pump 1 can be reduced more effectively.

[0087] According to this embodiment, the circuit board 70 is equipped with a plurality of electronic components 71 mounted on it, and the shielding member 80 is positioned on one axial side of the plurality of electronic components 71, so that the plurality of electronic components 71 and the shielding member 80 overlap when viewed in the axial direction. Therefore, the shielding member 80 can shield electromagnetic noise radiated from the plurality of electronic components 71 in one axial direction. Consequently, electromagnetic noise radiated to the outside from the rotating electric machine 2 and the pump 1 can be reduced.

[0088] Furthermore, according to this embodiment, the shielding member 80 is positioned relatively close to the multiple electronic components 71 on one axial side of the multiple electronic components 71. More specifically, the first shielding portion 81 is positioned relatively close to the second electronic component 71b on one axial side of the second electronic component 71b. The top wall portion 82b is positioned relatively close to the first electronic component 71a on one axial side of the first electronic component 71a. Electromagnetic noise is radiated radially from electronic components. Therefore, the larger the distance between the shielding member 80 and the multiple electronic components 71, the larger the area of ​​the shielding member 80 needs to be in order to reduce the electromagnetic noise radiated to the outside from the rotating electric machine 2. However, as described above, in this embodiment, since the shielding member 80 is positioned relatively close to the multiple electronic components 71, the electromagnetic noise radiated to the outside from the rotating electric machine 2 can be reduced by positioning the shielding member 80 only on one axial side of the multiple electronic components 71. Therefore, the shielding member 80 can be made smaller and lighter. Therefore, the weight of the rotating electric machine 2 and the pump 1 can be reduced.

[0089] According to this embodiment, the plurality of electronic components 71 includes a first electronic component 71a and a second electronic component 71b, the first electronic component 71a having a larger axial dimension than the second electronic component 71b, and the shielding member 80 has a side wall portion 82a surrounding the first electronic component 71a. Therefore, electromagnetic noise radiated radially outward from the first electronic component 71a, which has a larger axial dimension, can be shielded by the side wall portion 82a. Consequently, electromagnetic noise radiated to the outside from the rotating electric machine 2 and the pump 1 can be reduced.

[0090] According to this embodiment, the contact member 83 is made of metal and is fixed to the mounting target 5. Therefore, the shielding member 80 and the circuit board 70 can be electrically connected to the mounting target 5 using the contact member 83. Thus, a separate member for grounding the shielding member 80 and the circuit board 70 is not required. Consequently, an increase in the number of parts and manufacturing cost of the rotating electric machine 2 can be suppressed.

[0091] The present invention is not limited to the embodiments described above, and other configurations and methods can be adopted within the scope of the technical idea of ​​the present invention. For example, if the shielding member has an exposed portion and the exposed portion can come into contact with the connection terminal and the heat transfer member, then more than half of the shielding member in the thickness direction may be embedded in the cover body. Furthermore, the shielding member is not limited to the shape of this embodiment as long as it can reduce electromagnetic noise radiated from the control device. For example, it may be cylindrical in shape that houses the control device inside.

[0092] The first conductive member and the second conductive member are not limited to the shape of this embodiment, as long as they can electrically connect the circuit board and the contact member. Furthermore, it is not necessary to provide the first conductive member and the second conductive member separately; the first conductive member and the second conductive member may be part of the same single component. In addition, the first conductive member does not have to be embedded in the cover body, and the second conductive member does not have to be embedded in the support member.

[0093] The shielding member may be directly connected to the first or second conductive member, provided that it is stably grounded. In this case, the shielding member is connected to the mounting object via the first or second conductive member made of metal and a contact member. This makes it easier to transfer heat generated on the circuit board to the mounting object. Therefore, the heat dissipation of the circuit board can be improved. In addition, in this case, there is no need to provide connection terminals, which can reduce the number of parts in the rotating electric machine and lower manufacturing costs.

[0094] Furthermore, if the first conductive member can be grounded, it does not need to be connected to the contact member. For example, by connecting the positioning pin and the first conductive member inside the first flange, the first conductive member and the mounting object can be electrically connected, and the first conductive member can be grounded.

[0095] The applications of the rotating electric machine to which the present invention applies are not particularly limited. The rotating electric machine may be mounted on equipment other than pumps. The rotating electric machine is not limited to motors, but may also be a generator. The applications of a pump equipped with a rotating electric machine to which the present invention applies are not particularly limited. The type of fluid delivered by the pump is not particularly limited and may be water or the like. The rotating electric machine and pump may be mounted on equipment other than vehicles. In addition, each configuration and method described herein can be combined as appropriate within the bounds of mutual non-inconsistency. [Explanation of symbols]

[0096] 1...Pump, 2...Rotating electric machine, 5...Mounting target, 10...Housing, 11...Main body, 11b...Opening, 12...Cover member, 13...Cover main body, 18...Support member, 20...Rotor, 30...Stator, 40...Pump mechanism, 70...Circuit board, 71...Electronic component, 71a...First electronic component, 71b...Second electronic component, 80...Shielding member, 81d...Exposed part, 82a...Side wall, 83...Contact member, 85...First conductive member, 85a...First fixing part, 85b...First relay part, 85c...First connection part, 86...Second conductive member, 86a...Second fixing part, 86b...Second relay part, 86c...Second connection part, 87...Connection terminal, 90...Heat transfer member, J...Central axis

Claims

1. A rotating electric machine that is attached to the mounting target, A rotor that can rotate around its central axis, A stator facing the rotor with a gap in the radial direction, A circuit board is positioned on one axial side of the stator, A housing that houses the rotor, the stator, and the circuit board inside, Equipped with, The aforementioned housing is A main body having an opening on one side in the axial direction, A cover member that closes the aforementioned opening, It has, The cover member is The resin cover body, A metal shielding member, at least a portion of which is embedded and held inside the cover body, and which is positioned on one axial side of the circuit board, A first conductive member, which is held in the cover body and has conductivity, A contact member is held in the cover body, contacts the object to be mounted, and is conductive, It has, The shielding member has an exposed portion that is exposed from the cover body, The first conductive member is electrically connected to the circuit board and the contact member. The circuit board is a rotating electric machine that is electrically connected to the exposed portion.

2. The rotating electric machine according to claim 1, wherein the shielding member is plate-shaped.

3. A second conductive member connected to the circuit board, A support member that supports the circuit board, Equipped with, The first conductive member is fixed to the contact member, A portion of the first conductive member is embedded inside the cover body. The first conductive member has a first connecting portion, The first connection portion is located outside the cover body portion, A portion of the second conductive member is embedded inside the support member. The second conductive member has a second connecting portion, The second connecting portion is located outside the support member, The rotating electric machine according to claim 1 or 2, wherein the second connecting portion and the first connecting portion are in contact.

4. The first conductive member has a first fixing portion fixed to the contact member and a first relay portion connecting the first fixing portion and the first connecting portion. The width of the first connection section is greater than the width of the first relay section. The second conductive member has a second fixing portion connected to the circuit board and a second relay portion connecting the second fixing portion and the second connecting portion. The rotating electric machine according to claim 3, wherein the width of the second connection portion is greater than the width of the second relay portion.

5. The first fixing part is annular, The rotating electric machine according to claim 4, wherein the contact member is cylindrical and press-fitted into the first fixed portion.

6. The first fixing portion and a part of the contact member are each embedded inside the cover body portion. The rotating electric machine according to claim 4 or 5, wherein the first fixing portion and the contact member are fixed inside the cover body.

7. The circuit board is equipped with connection terminals, The aforementioned connection terminal is in the shape of an elastic leaf spring, The rotating electric machine according to any one of claims 1 to 6, wherein the exposed portion is electrically connected to the circuit board via the connection terminal.

8. The circuit board comprises a plurality of electronic components mounted on it, The shielding member is arranged on one axial side of the plurality of electronic components. A rotating electric machine according to any one of claims 1 to 7, wherein, when viewed in the axial direction, a plurality of the electronic components and the shielding member overlap.

9. The plurality of electronic components each have a first electronic component and a second electronic component, The first electronic component has a larger axial dimension than the second electronic component. The rotating electric machine according to claim 8, wherein the shielding member has a side wall portion that surrounds the first electronic component.

10. The circuit board is equipped with a heat transfer member mounted on a surface facing one side in the axial direction, The heat transfer member is in contact with the exposed portion, as described in any one of claims 1 to 9.

11. The rotating electric machine according to any one of claims 1 to 10, wherein the contact member is made of metal and is fixed to the object to be mounted.

12. A rotating electric machine according to any one of claims 1 to 11, A pump mechanism connected to the rotor, A pump equipped with the following features.

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