Motor, pump, and manufacturing method of motor

Abstract

To provide a motor capable of preventing increase in manufacturing man-hours.SOLUTION: A motor 11 comprises: a motor part comprising a rotor and a stator; a circuit board 60 connected with the motor part; a housing 20 comprising a housing body part 21, a substrate storage part 20a in which the circuit board is stored, and a lid member 30 attached to the housing body part; and a first positioning part 51 placed in the substrate storage part. The circuit board comprises a first through-hole 60a and a second through-hole 60b. The lid member comprises: a top face part 32 opposed to the circuit board; a second positioning part 35 that extends toward the circuit board; and a first connection terminal 36f which protrudes toward the circuit board to be engaged with the second through-hole. One of the first positioning part and the second positioning part passes through the first through-hole. A length of part placed inside a hole part 35a out of the other of the first positioning part and the second positioning part is longer than another length of a part inserted into the second through-hole out of the first connection terminal.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present invention relates to a motor, a pump, and a method for manufacturing a motor. [Background technology]

[0002] BACKGROUND ART Electric pumps are known that have a configuration in which a terminal connected to a circuit board fixed to a housing is connected to a connector terminal held by a cover member (for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2018-71499 Summary of the Invention [Problem to be solved by the invention]

[0004] In the electric pump described above, in a configuration in which the connector terminals are fitted into through holes provided in the circuit board to directly connect the connector terminals to the circuit board in order to reduce the number of parts, it is difficult to visually confirm the positions of the connector terminals relative to the through holes when attaching the cover member to the housing. Therefore, since it is difficult to fit the terminals into the through holes when attaching the cover member to the housing, there is a risk that the number of steps required to manufacture the electric pump will increase.

[0005] In view of the above circumstances, one aspect of the present invention has an object to provide a motor, a pump, and a method for manufacturing a motor that can suppress an increase in the number of manufacturing steps. [Means for solving the problem]

[0006] One embodiment of the motor of the present invention includes a motor section having a rotor rotatable about a central axis and a stator facing the rotor across a gap; a circuit board electrically connected to the motor section; a housing having a housing main body that accommodates the motor section, a board accommodating section that accommodates the circuit board, and a cover member attached to the housing main body; and a first positioning section disposed in the board accommodating section. The circuit board has a first through hole and a second through hole. The cover member has a top surface that faces the circuit board, a second positioning section extending from the top surface toward the circuit board, and a first connection terminal that protrudes from the top surface toward the circuit board and is fitted into the second through hole. Either the first positioning section or the second positioning section is passed through the first through hole. One of the first positioning section and the second positioning section has a hole into which the other of the first positioning section and the second positioning section is fitted. The length of the other of the first positioning portion and the second positioning portion that is disposed inside the hole is longer than the length of the portion of the first connection terminal that is passed through the second through hole.

[0007] One aspect of the pump of the present invention includes the motor described above and a pump mechanism connected to the rotor.

[0008] One aspect of the motor manufacturing method of the present invention is a manufacturing method of a motor including a motor section having a rotor rotatable about a central axis and a stator facing the rotor across a gap, a circuit board electrically connected to the motor section, a housing having a housing main body section that accommodates the motor section, a board accommodating section that accommodates the circuit board, and a cover member attached to the housing main body section, and a first positioning section disposed on the board accommodating section, the method including an attachment step of attaching the cover member to the housing main body section. The cover member has a top surface section facing the circuit board, a second positioning section extending from the top surface section toward the circuit board, and a first connection terminal protruding from the top surface section toward the circuit board. The mounting process includes a first process of passing the first positioning portion through a first through hole of the circuit board, a second process of fitting one of the first positioning portion and the second positioning portion into a hole portion of the other of the first positioning portion and the second positioning portion, and a third process of fitting the first connection terminal into the second through hole of the circuit board. [Effects of the Invention]

[0009] According to one aspect of the present invention, in a motor, a pump, and a method for manufacturing a motor, an increase in the number of manufacturing steps can be suppressed. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 1 is a perspective view showing a pump according to a first embodiment. [Figure 2] FIG. 2 is a first cross-sectional view showing the pump of the first embodiment. [Figure 3] FIG. 3 is a second cross-sectional view showing the pump of the first embodiment. [Figure 4] FIG. 4 is a perspective view showing the cover member of the first embodiment. [Figure 5] FIG. 5 is a top view showing a part of the pump of the first embodiment. [Figure 6] FIG. 6 is a cross-sectional view showing a part of the pump of the first embodiment. [Figure 7]FIG. 7 is a perspective view showing a part of the pump of the first embodiment. [Figure 8] FIG. 8 is a flowchart showing the steps of mounting the motor according to the first embodiment. [Figure 9] FIG. 9 is a first cross-sectional view showing the mounting step of the first embodiment. [Figure 10] FIG. 10 is a second cross-sectional view showing the mounting step of the first embodiment. [Figure 11] FIG. 11 is a third cross-sectional view showing the mounting step of the first embodiment. [Figure 12] FIG. 12 is a cross-sectional view showing a part of a pump according to another aspect of the first embodiment. [Figure 13] FIG. 13 is a top view showing a part of a pump according to a modification of the first embodiment. [Figure 14] FIG. 14 is a cross-sectional view showing a part of the pump of the second embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0011] In the following description, the Z axis is indicated in the figures where appropriate. The Z axis is the direction in which the central axis J of 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, i.e., the direction parallel to the Z axis, will be referred to as the "axial direction." The radial direction centered on the central axis J will be simply referred to as the "radial direction." The circumferential direction centered on the central axis J will be simply referred to as the "circumferential direction." The circumferential direction is indicated by arrow θ in each figure. The side of the axial direction toward which the Z axis arrow points (+Z side) will be referred to as the "upper side." The side of the axial direction opposite to the side toward which the Z axis arrow points (-Z side) will be referred to as the "lower side." Note that the terms "upper side" and "lower side" are simply names used to describe the relative positional relationship of each part, and the actual positional relationship may be other than the positional relationship indicated by these names.

[0012] First Embodiment The pump 10 of this embodiment shown in FIG. 1 is an electric pump attached to equipment mounted on a vehicle. The equipment to which the pump 10 is attached may be an automatic transmission or a drive unit that drives the axles of the vehicle. The pump 10 is, for example, an electric oil pump that supplies oil to equipment mounted on the vehicle. As shown in FIG. 2, the pump 10 includes a motor 11 and a pump mechanism unit 70. The motor 11 transmits rotational torque to the pump mechanism unit 70. The motor 11 includes a housing 20, a motor unit 13, and a circuit board 60.

[0013] The housing 20 accommodates the motor section 13, the circuit board 60, and the pump mechanism section 70 inside. The housing 20 has a housing main body section 21, a lid member 30, a board accommodating section 20a, a pump cover section 38, and a board holding section 50. In this embodiment, the housing main body section 21, the lid member 30, the pump cover section 38, and the board holding section 50 are separate members. The lid member 30 is attached to the upper portion of the housing main body section 21. The pump cover section 38 is fixed to the lower portion of the housing main body section 21. The board holding section 50 is disposed inside the housing main body section 21.

[0014] The housing body 21 has a generally cylindrical shape and extends axially about a central axis J. The housing body 21 accommodates the motor 13 and the pump mechanism 70 therein. The housing body 21 has a peripheral wall 22, a bottom wall 23, and a pump accommodating section 25. As shown in FIG. 1 , the housing body 21 has a flange 24.

[0015] As shown in FIG. 2, the peripheral wall portion 22 has a generally cylindrical shape extending in the axial direction around the central axis J. The peripheral wall portion 22 surrounds the motor portion 13 from the radially outer side. The upper end of the peripheral wall portion 22 is the upper end of the housing main body portion 21. The peripheral wall portion 22 has a first opening 22a that opens upward, a recessed portion 22c, a first groove portion 22e, and a second groove portion 22f. In other words, the housing main body portion 21 has the recessed portion 22c.

[0016] The recess 22c is a groove recessed radially inward from the outer circumferential surface of the peripheral wall portion 22. The recess 22c is provided in an upper portion of the peripheral wall portion 22. The recess 22c extends around the entire circumference along the outer circumferential surface of the peripheral wall portion 22.

[0017] The first groove 22e is a groove recessed radially inward from the outer circumferential surface of the peripheral wall 22. The first groove 22e is provided above the recess 22c. The first groove 22e extends around the entire circumference along the outer circumferential surface of the peripheral wall 22. An O-ring 81 is fitted in the first groove 22e.

[0018] The second groove 22f is a groove recessed radially inward from the outer circumferential surface of the peripheral wall 22. The second groove 22f is provided in a lower portion of the peripheral wall 22. The second groove 22f extends around the entire circumference along the outer circumferential surface of the peripheral wall 22. An O-ring 82 is fitted in the second groove 22f. The O-ring 82 comes into contact with a device (not shown) to which the pump 10 is attached. The O-ring 82 provides a seal between the housing main body 21 and the device.

[0019] The bottom wall portion 23 has a substantially annular shape centered on the central axis J. The radial outer edge of the bottom wall portion 23 is connected to the lower end of the peripheral wall portion 22. The bottom wall portion 23 is provided with a bottom wall hole 23a and a cylindrical portion 23b. The bottom wall hole 23a is a hole that penetrates the bottom wall portion 23 in the axial direction. When viewed from the axial direction, the bottom wall hole 23a has a circular shape centered on the central axis J. The cylindrical portion 23b protrudes upward from the edge of the bottom wall hole 23a of the bottom wall portion 23. The cylindrical portion 23b has a substantially cylindrical shape centered on the central axis J.

[0020] The pump housing portion 25 houses the pump mechanism portion 70 therein. The pump housing portion 25 has a generally cylindrical shape extending in the axial direction around the central axis line J. The pump housing portion 25 opens downward. An upper end of the pump housing portion 25 is connected to the radial outer edge of the bottom wall portion 23 in the axial direction.

[0021] As shown in FIG. 1 , the flange portion 24 protrudes radially outward from the upper portion of the peripheral wall portion 22. The flange portion 24 is located below the recess 22c. The flange portion 24 is provided with a flange hole 24a. The flange hole 24a is a hole that penetrates the flange portion 24 in the axial direction. In this embodiment, the housing main body 21 has three flange portions 24. The flange portions 24 are spaced apart from one another in the circumferential direction. When a bolt (not shown) is passed through each flange hole 24a and tightened into a female threaded hole provided in a device (not shown), the housing main body 21 is fixed to the device. This fixes the pump 10 to the device.

[0022] As shown in Figure 2, the pump cover portion 38 has a generally cylindrical shape that protrudes in the axial direction about the central axis J. The pump cover portion 38 is disposed below the pump mechanism portion 70. The pump cover portion 38 is fixed to the lower end of the pump housing portion 25. The pump cover portion 38 closes the opening of the pump housing portion 25 from below. The pump cover portion 38 is provided with a third groove portion 38a, an intake port (not shown), and an outlet port (not shown).

[0023] The third groove 38a is a groove recessed radially inward from the outer circumferential surface of the pump cover portion 38. The third groove 38a extends around the entire circumference along the outer circumferential surface of the pump cover portion 38. An O-ring 83 is fitted into the third groove 38a. The O-ring 83 provides a seal between the pump cover portion 38 and a device (not shown) to which the pump 10 is attached.

[0024] The suction port and the discharge port are each a hole that penetrates the pump cover portion 38 in the axial direction. The suction port and the discharge port each connect the inside of the pump housing portion 25 to the outside of the pump 10. In this embodiment, oil is drawn into the inside of the pump housing portion 25 through the suction port. The oil is discharged to the outside of the pump 10 through the discharge port.

[0025] The cover member 30 accommodates the circuit board 60. The cover member 30 is attached to the upper portion of the housing main body 21. The cover member 30 closes the first opening 22a from above. The cover member 30 has a cover main body 31, a second positioning portion 35, and a connector portion 36.

[0026] As shown in FIG. 3, the lid main body 31 has a generally cylindrical shape centered on the central axis J. The lid main body 31 opens downward. The lid main body 31 is attached to the upper end of the housing main body 21. The lid main body 31 is made of resin. The lid main body 31 has a top surface 32 and a side wall 33. That is, the lid member 30 has the top surface 32.

[0027] The top surface portion 32 has a plate shape that extends in a direction perpendicular to the axial direction. When viewed in the axial direction, the top surface portion 32 has a substantially circular shape centered on the central axis line J. The top surface portion 32 is disposed above the circuit board 60. The top surface portion 32 faces the circuit board 60. In this embodiment, the top surface portion 32 faces the circuit board 60 in the axial direction. As shown in FIG. 4 , a first terminal holding portion 32a is provided on the top surface portion 32. The first terminal holding portion 32a has a substantially rectangular parallelepiped shape that protrudes downward from the top surface portion 32. The lower end of the first terminal holding portion 32a is located above the lower end of the side wall portion 33.

[0028] As shown in Fig. 3, the side wall portion 33 has a generally cylindrical shape extending in the axial direction about the central axis J. The upper end of the side wall portion 33 is connected to the radial outer edge of the top surface portion 32. The lower portion of the side wall portion 33 surrounds the upper portion of the peripheral wall portion 22 from the radial outside. As shown in Fig. 4, the side wall portion 33 has a side wall main body portion 33a and claw portions 33c. That is, the cover member 30 has the claw portions 33c.

[0029] The side wall main body portion 33a is the upper portion of the side wall portion 33. The side wall main body portion 33a is generally annular and protrudes in the axial direction about the central axis J. The upper end of the side wall main body portion 33a is connected to the radial outer edge of the top surface portion 32. As shown in FIG. 3 , the inner circumferential surface of the side wall main body portion 33a contacts an O-ring 81. As a result, the O-ring 81 seals the gap between the housing main body portion 21 and the cover member 30.

[0030] As shown in FIG. 4, the second positioning portion 35 has a generally cylindrical shape extending downward from the top surface portion 32. As shown in FIG. 3, the second positioning portion 35 extends from the top surface portion 32 toward the circuit board 60. The second positioning portion 35 is disposed above the circuit board 60. In this embodiment, the second positioning portion 35 faces the circuit board 60 in the axial direction. As shown in FIG. 4, the cover member 30 has a plurality of second positioning portions 35. In this embodiment, the cover member 30 has three second positioning portions 35. In this embodiment, the second positioning portion 35 has a hole portion 35a. The hole portion 35a is recessed upward from the surface of the second positioning portion 35 facing downward. When viewed in the axial direction, the hole portion 35a is generally circular.

[0031] As shown in FIG. 3, the claw portion 33c is plate-shaped and extends downward from the lower end of the side wall main body portion 33a. That is, the claw portion 33c extends in the extension direction of the second positioning portion 35. When viewed in the axial direction, the claw portion 33c has a generally arc-shaped configuration centered on the central axis J. The claw portion 33c is elastically deformable in the radial direction. That is, the claw portion 33c is elastically deformable in the axial direction, i.e., in a direction intersecting the extension direction of the second positioning portion 35. As shown in FIG. 4, the cover member 30 has a plurality of claw portions 33c. In this embodiment, the cover member 30 has 12 claw portions 33c. The number of claw portions 33c included in the cover member 30 may be 11 or less, or 13 or more. The claw portions 33c are spaced apart from one another in the circumferential direction. As shown in FIG. 3, each claw portion 33c has a protrusion 33d.

[0032] The protrusions 33d are portions below the claws 33c. The protrusions 33d protrude radially inward. As described above, the recesses 22c of the housing main body 21 are recessed radially inward from the outer peripheral surface of the peripheral wall portion 22. In other words, the recesses 22c are recessed radially inward from the outer peripheral surface of the housing main body 21. In other words, the recesses 22c are recessed from the outer peripheral surface of the housing main body 21 in the axial direction, i.e., in a direction intersecting the extension direction of the claws 33c. Each protrusion 33d is disposed inside the recesses 22c. In this way, the cover member 30 is attached to the housing main body 21.

[0033] 1 electrically connects the circuit board 60 to an external power source (not shown) that supplies power to the motor unit 13. The connector unit 36 ​​has a connector holding portion 36a and a connector terminal 36c.

[0034] The connector holding portion 36a has a generally rectangular cylindrical shape and protrudes radially outward from the lid main body 31. The connector holding portion 36a is connected to the top surface 32. This connects the connector portion 36 to the top surface 32. The connector holding portion 36a opens radially outward. Some of the connector terminals 36c are disposed inside the connector holding portion 36a. The connector holding portion 36a is made of resin.

[0035] As shown in FIG. 2, the connector terminal 36c is connected to the circuit board 60. The connector terminal 36c is made of metal. The connector terminal 36c is conductive. The connector terminal 36c electrically connects an external power supply (not shown) to the circuit board 60. As shown in FIG. 5, the connector portion 36 has a plurality of connector terminals 36c. In this embodiment, the connector portion 36 has five connector terminals 36c. In this embodiment, the connector terminals 36c are arranged at intervals along a direction perpendicular to the radial direction. As shown in FIG. 2, the connector terminal 36c has a first extension portion 36d, a second extension portion 36e, and a first connection terminal 36f. That is, the cover member 30 has the first connection terminal 36f.

[0036] As shown in FIG. 5, the first extension portion 36d has a plate shape extending in the radial direction. The plate surface of the first extension portion 36d faces the axial direction. As shown in FIG. 2, the radially outer portion of the first extension portion 36d is located inside the connector holding portion 36a. As described above, the connector holding portion 36a opens radially outward. As a result, the radially outer portion of the first extension portion 36d is exposed to the outside of the housing 20. That is, the connector terminal 36c is exposed to the outside of the housing 20. The radially outer portion of the first extension portion 36d is electrically connected to an external power supply (not shown). As a result, the connector terminal 36c is electrically connected to the external power supply. The radially inner portion of the first extension portion 36d passes radially through the inside of the top surface portion 32. The radially inner portion of the first extension portion 36d is held by the top surface portion 32. As a result, the connector terminal 36c is held by the lid main body portion 31.

[0037] The second extension portion 36e has a plate shape extending in the axial direction. The plate surface of the second extension portion 36e faces in the radial direction. The upper end of the second extension portion 36e is connected to the radially inner end of the first extension portion 36d. The second extension portion 36e passes axially through the interior of the first terminal holding portion 32a. The second extension portion 36e is held by the first terminal holding portion 32a. As a result, the connector terminal 36c is held in the lid main body portion 31. As shown in FIG. 4, the lower end of the second extension portion 36e protrudes downward from the first terminal holding portion 32a.

[0038] The first connection terminal 36f is a part of the connector terminal 36c. The first connection terminal 36f has a plate shape that protrudes in the axial direction. The upper end of the first connection terminal 36f is axially connected to the lower end of the second extending portion 36e. As shown in FIG. 6, the first connection terminal 36f protrudes downward from the first terminal holding portion 32a. The first connection terminal 36f protrudes from the top surface portion 32 toward the circuit board 60. The first connection terminal 36f is connected to the circuit board 60. As a result, the connector terminal 36c electrically connects an external power supply (not shown) to the circuit board 60. The lower end of the first connection terminal 36f is located lower than the lower end of the second positioning portion 35. The plate surface of the first connection terminal 36f faces in the radial direction. As shown in FIG. 4, when viewed in the radial direction, the first connection terminal 36f has a generally elliptical shape with its major axis extending in the axial direction. The first connection terminal 36f is provided with a hole that penetrates the first connection terminal 36f in the radial direction. This allows the first connection terminal 36f to be elastically deformable in a direction perpendicular to the radial direction. As described above, the connector portion 36 has a plurality of connector terminals 36c. Therefore, the cover member 30 has a plurality of first connection terminals 36f. The first connection terminals 36f are arranged at intervals from one another in a direction perpendicular to the radial direction.

[0039] 3, the board accommodating portion 20a is part of the internal space of the housing 20. The board accommodating portion 20a is a space surrounded by the portion of the peripheral wall portion 22 above the recessed portion 22c, the motor portion 13, and the cover member 30. The board accommodating portion 20a accommodates the board holding portion 50 and the circuit board 60.

[0040] The motor unit 13 is accommodated inside the housing main body 21. The motor unit 13 is disposed below the circuit board 60 and above the pump mechanism unit 70. The motor unit 13 has a rotor 40 and a stator 45.

[0041] The rotor 40 is rotatable about the central axis J. The rotor 40 has a rotor core 41, a plurality of magnets 42, and a shaft 43. Each of the magnets 42 and the shaft 43 is fixed to the rotor core 41. Each of the magnets 42 is arranged along the circumferential direction. The rotor 40 is supported by the inner circumferential surface of the bottom wall hole 23a that supports the shaft 43 so as to be rotatable about the central axis J. The shaft 43 is cylindrical and extends in the axial direction about the central axis J. The shaft 43 is passed axially through the bottom wall hole 23a and is arranged straddling the interior of the peripheral wall portion 22 and the interior of the pump accommodating portion 25.

[0042] The stator 45 is disposed radially outward of the rotor 40. The stator 45 faces the rotor 40 across a radial gap. The stator 45 includes a stator core 46, an insulator 47, and a coil portion 48.

[0043] The stator core 46 has a generally annular shape and radially surrounds the rotor core 41. The outer peripheral surface of the stator core 46 is fixed to the peripheral wall portion 22 of the housing main body 21. In this embodiment, the stator core 46 is press-fitted into the peripheral wall portion 22. The stator core 46 may also be fixed to the peripheral wall portion 22 by other methods, such as adhesive.

[0044] The insulator 47 has a substantially circular ring shape centered on the central axis J. The insulator 47 is attached to the stator core 46. The insulator 47 is made of resin. The insulator 47 insulates the stator core 46 from the coil portion 48.

[0045] 2 is electrically connected to a circuit board 60. Power is supplied to the coil part 48 from an external power source (not shown) via the circuit board 60. The coil part 48 has a plurality of coil main body parts 48a and coil lead wires 48c.

[0046] Each of the multiple coil body portions 48a is attached to the stator core 46 via an insulator 47. Although not shown in the drawings, in this embodiment, the coil portion 48 has twelve coil body portions 48a. The coil body portions 48a are arranged at intervals along the circumferential direction. As shown in FIG. 7, the coil lead wires 48c are drawn out upward from the coil body portions 48a. Although not shown in the drawings, in this embodiment, the coil portion 48 has six coil lead wires 48c.

[0047] The board holding portion 50 has a substantially circular ring shape centered on the central axis J. As shown in FIG. 3, the board holding portion 50 is disposed above the stator core 46. The board holding portion 50 is made of resin. The board holding portion 50 has an annular portion 50a, a plurality of legs 50b, and a first positioning portion 51. As a result, the housing 20 has the first positioning portion 51. In other words, the motor 11 is equipped with the first positioning portion 51. As shown in FIG. 7, the board holding portion 50 has a second terminal holding portion 52, a first protrusion 53a, and a second protrusion 53b.

[0048] The annular portion 50a has an annular plate shape centered on the central axis J. The plate surface of the annular portion 50a faces the axial direction. As shown in FIG. 3, the annular portion 50a is disposed between the stator core 46 and the circuit board 60 in the axial direction.

[0049] Each of the multiple legs 50b extends downward from the radial outer edge of the annular portion 50a. Although not shown, in this embodiment, the substrate holding portion 50 has six legs 50b. The legs 50b are spaced apart from one another in the circumferential direction. The lower end of each leg 50b is fixed to the upward-facing surface of the stator core 46. In this way, the substrate holding portion 50 is attached to the stator 45.

[0050] As shown in FIG. 7, the first positioning portion 51 has a columnar shape that protrudes upward from the annular portion 50a. In this embodiment, the first positioning portion 51 has a substantially cylindrical shape. The first positioning portion 51 may have a prismatic shape, such as a rectangular column shape. In this embodiment, the substrate holding portion 50 has a plurality of first positioning portions 51. That is, the motor 11 is equipped with a plurality of first positioning portions 51. In this embodiment, the substrate holding portion 50 has three first positioning portions 51. As shown in FIG. 6, each first positioning portion 51 is disposed in the substrate accommodating portion 20a. In this embodiment, each first positioning portion 51 is inserted into a hole portion 35a of a different second positioning portion 35. Each first positioning portion 51 is fitted into the hole portion 35a. That is, the second positioning portion 35 has a hole portion 35a into which the first positioning portion 51 is fitted. That is, one of the first positioning portion 51 and the second positioning portion 35 has a hole 35a into which the other of the first positioning portion 51 and the second positioning portion 35 is fitted. This determines the radial and circumferential positions of the cover member 30 relative to the board holding portion 50. Therefore, the radial and circumferential positions of each first connection terminal 36f relative to the board holding portion 50 are determined. The first positioning portion 51 has a columnar portion 51a and an inclined portion 51b. The first positioning portion 51 is provided with a step portion 51d.

[0051] The columnar portion 51a has a generally cylindrical shape and protrudes upward from the annular portion 50a. The upper portion of the columnar portion 51a is fitted into the hole portion 35a. As a result, each first positioning portion 51 is fitted into the hole portion 35a. The inclined portion 51b has a generally cylindrical shape and protrudes upward from the upper end of the columnar portion 51a. The inclined portion 51b is the upper portion of the first positioning portion 51. The diameter of the inclined portion 51b decreases toward the top. In other words, the outer peripheral surface of the inclined portion 51b is positioned radially inward of the first positioning portion 51 toward the top. The inclined portion 51b is positioned inside the hole portion 35a.

[0052] As shown in FIG. 7, the step portion 51d is plate-shaped and protrudes from a lower portion of the outer circumferential surface of the first positioning portion 51 toward the outside of the first positioning portion 51. The lower end of the step portion 51d is connected to the annular portion 50a. In this embodiment, each first positioning portion 51 is provided with a plurality of step portions 51d. As shown in FIG. 3, each step portion 51d is located between the annular portion 50a and the circuit board 60 in the axial direction. The upward-facing surface of each step portion 51d supports the circuit board 60 in the axial direction. This determines the axial position of the circuit board 60 relative to the board holding portion 50.

[0053] As shown in FIG. 7, the second terminal holding portion 52 has a generally rectangular parallelepiped shape that protrudes upward from the annular portion 50a. When viewed in the axial direction, the second terminal holding portion 52 has a generally rectangular shape with its long sides extending in a direction perpendicular to the radial direction. The upper end of the second terminal holding portion 52 is located lower than the upper end of the first positioning portion 51. In this embodiment, the board holding portion 50 has three second terminal holding portions 52. The second terminal holding portions 52 are arranged at intervals along the circumferential direction. Each second terminal holding portion 52 has a recessed portion 52a.

[0054] The recesses 52a are holes recessed downward from the upward surface of the second terminal holding portion 52. When viewed in the axial direction, the recesses 52a are generally rectangular with their long sides extending perpendicular to the radial direction. A portion of the second connection terminal 55 is disposed inside each recess 52a.

[0055] Each second connection terminal 55 has a plate shape with its plate surface facing in the radial direction. Each second connection terminal 55 is made of metal. Each second connection terminal 55 is conductive. A lower portion of each second connection terminal 55 is disposed inside a different recess 52a. In this embodiment, the lower portion of each second connection terminal 55 is fitted into the recess 52a. This allows each second connection terminal 55 to be held by the board holding part 50. Each second connection terminal 55 may be adhesively fixed to the inner surface of the recess 52a with an adhesive. A coil lead wire 48c is connected to each second connection terminal 55. This allows each second connection terminal 55 to be connected to the coil part 48. That is, each second connection terminal 55 is connected to the stator 45. Each second connection terminal 55 has a second connection part 55a.

[0056] The second connection portion 55a has a plate shape that protrudes in the axial direction. The plate surface of the second connection portion 55a faces the radial direction. When viewed in the radial direction, the second connection portion 55a has a generally elliptical shape with its major axis extending in the axial direction. The second connection portion 55a has a hole that penetrates the second connection portion 55a in the radial direction. When viewed in the radial direction, the hole has a generally elliptical shape with its major axis extending in the axial direction. Because the hole is provided in the second connection portion 55a, the second connection portion 55a can elastically deform in the circumferential direction. In this embodiment, the second connection terminal 55 has two second connection portions 55a. The two second connection portions 55a are arranged at an interval from each other in the circumferential direction.

[0057] The first protrusion 53a is columnar and protrudes upward from the annular portion 50a. The second protrusion 53b is columnar and protrudes upward from the annular portion 50a. Although not shown, the first protrusion 53a and the second protrusion 53b are each located below the circuit board 60. The first protrusion 53a and the second protrusion 53b each support the circuit board 60 in the axial direction. This allows the axial position of the circuit board 60 relative to the board holding portion 50 to be determined with greater precision.

[0058] As shown in FIG. 2, the pump mechanism 70 is housed inside the pump housing 25. The pump mechanism 70 has an inner rotor 71 and an outer rotor 72. The inner rotor 71 is connected to a portion of the shaft 43 that protrudes into the pump housing 25. This connects the pump mechanism 70 to the rotor 40. The inner rotor 71 is annular and surrounds the shaft 43. The outer rotor 72 is annular and surrounds the inner rotor 71. The inner rotor 71 and the outer rotor 72 mesh with each other. As a result, when the rotor 40 rotates around the central axis J, the inner rotor 71 and the outer rotor 72 rotate around the central axis J.

[0059] The circuit board 60 controls the power supplied to the coil unit 48. The circuit board 60 is disposed above the motor unit 13. The circuit board 60 is accommodated in the board accommodating portion 20a. The circuit board 60 is plate-shaped and extends in a direction perpendicular to the axial direction. As shown in FIG. 5, the circuit board 60 has a substantially circular shape when viewed from the axial direction. The circuit board 60 has a first through hole 60a, a second through hole 60b, and a third through hole 60c.

[0060] As shown in FIG. 6, the first through hole 60a is a hole that penetrates the circuit board 60 in the axial direction. When viewed in the axial direction, the first through hole 60a is a hole with a substantially circular shape. As shown in FIG. 5, the circuit board 60 has a plurality of first through holes 60a. In this embodiment, the circuit board 60 has three first through holes 60a. The first through holes 60a are spaced apart from one another in the circumferential direction. As shown in FIGS. 5 and 6, a first positioning portion 51 is passed through each first through hole 60a in the axial direction. That is, either the first positioning portion 51 or the second positioning portion 35 is passed through each first through hole 60a. More specifically, as shown in FIG. 6, a columnar portion 51a is passed through the first through hole 60a in the axial direction. In this embodiment, the columnar portion 51a is fitted into each first through hole 60a. This determines the radial and circumferential positions of the circuit board 60 relative to the board holding portion 50. In the axial direction, the circuit board 60 is disposed between the step portion 51d and the second positioning portion 35. As described above, the upward-facing surface of each step portion 51d supports the circuit board 60 in the axial direction. This determines the axial position of the circuit board 60 relative to the board holding portion 50. As a result, the circuit board 60 is held by the board holding portion 50. Note that the second positioning portion 35 may be in contact with the circuit board 60 in the axial direction, or may be disposed at a distance from the circuit board 60 in the axial direction.

[0061] The second through holes 60b are holes that penetrate the circuit board 60 in the axial direction. When viewed in the axial direction, the second through holes 60b are generally rectangular holes. The second through holes 60b are, for example, through holes. A conductive copper foil is provided on the inner surface of the second through holes 60b. In this embodiment, the circuit board 60 has five second through holes 60b. As shown in FIG. 5, the second through holes 60b are spaced apart from one another in a direction perpendicular to the radial direction. As shown in FIG. 6, different first connection terminals 36f are axially inserted through the second through holes 60b. The first connection terminals 36f are fitted into different second through holes 60b. This connects the circuit board 60 to the first connection terminals 36f. As described above, the connector terminals 36c are electrically connected to an external power supply (not shown). This electrically connects the circuit board 60 to the external power supply via the connector terminals 36c.

[0062] According to this embodiment, the first positioning portion 51 is provided with a step portion 51d facing the circuit board 60, and the circuit board 60 is disposed between the step portion 51d and the second positioning portion 35. Therefore, the step portion 51d and the second positioning portion 35 can determine the position of the circuit board 60 in the axial direction. Therefore, even if vibrations of the motor portion 13 are applied to the circuit board 60 during operation of the motor 11, the circuit board 60 can be prevented from vibrating in the axial direction. This allows for stable connection between the first connection terminal 36f and the second through-hole 60b, thereby enabling stable electrical connection between an external power source (not shown) and the circuit board 60. This improves the stability of operation of the motor 11.

[0063] According to this embodiment, the cover member 30 has a connector portion 36 connected to the top surface portion 32. The connector portion 36 has a connector terminal 36c exposed to the outside of the housing 20, and the first connection terminal 36f is a part of the connector terminal 36c. Therefore, an external power supply (not shown) and the circuit board 60 can be electrically connected only via the connector terminal 36c. Therefore, compared to a configuration in which the external power supply and the circuit board 60 are electrically connected via other members such as relay terminals in addition to the connector terminal 36c, an increase in the number of parts of the motor 11 can be suppressed. Therefore, an increase in the manufacturing cost of the motor 11 can be suppressed.

[0064] As shown in FIG. 5 , in this embodiment, each first through hole 60a is positioned radially outward of each second through hole 60b. Therefore, in this embodiment, each first positioning portion 51 and each second positioning portion 35 is positioned radially outward of each first connection terminal 36f. Furthermore, the distance Ld1 between a first pair of first positioning portions 51 among the three first positioning portions 51 is longer than the distance Lp between the pair of first connection terminals 36f that are located furthest apart among the multiple first connection terminals 36f. Therefore, the distance Ld1 between at least one pair of first positioning portions 51 is longer than the distance Lp between the pair of first connection terminals 36f. Furthermore, in this embodiment, the distance Ld2 between a second pair of first positioning portions 51 and the distance Ld3 between a third pair of first positioning portions 51, which are other pairs of first positioning portions 51, are each longer than the distance Lp between the pair of first connection terminals 36f. Note that, as long as the spacing between one pair of first positioning portions 51 is longer than the distance Lp between the corresponding pair of first connection terminals 36f, the spacing between other first positioning portions 51 may be shorter than the distance Lp between the corresponding pair of first connection terminals 36f. As shown in Fig. 6, the length Li1 of the portion of the first positioning portion 51 that is disposed inside the hole 35a is longer than the length Li2 of the portion of the first connection terminal 36f that is passed through the second through-hole 60b.

[0065] The third through holes 60c shown in FIG. 5 are holes that penetrate the circuit board 60 in the axial direction. When viewed in the axial direction, the third through holes 60c are generally circular holes. The third through holes 60c are, for example, through holes. Conductive copper foil is provided on the inner surfaces of the third through holes 60c. In this embodiment, the circuit board 60 has six third through holes 60c. The third through holes 60c are spaced apart from one another in the circumferential direction. Different second connection portions 55a are axially passed through the respective third through holes 60c. The second connection portions 55a are fitted into different third through holes 60c. This connects the circuit board 60 to the respective second connection terminals 55. In this embodiment, the circuit board 60 and the respective second connection terminals 55 are directly connected. As described above, the respective second connection terminals 55 are connected to the stator 45. As a result, the second connection terminals 55 electrically connect the stator 45 and the circuit board 60. That is, the circuit board 60 is electrically connected to the motor unit 13 via each second connection terminal 55. As described above, the circuit board 60 is electrically connected to an external power supply (not shown) via the connector terminals 36c. Therefore, the external power supply and the motor unit 13 are electrically connected via the connector terminals 36c, the circuit board 60, and the second connection terminals 55.

[0066] According to this embodiment, the housing 20 has a board holding portion 50 attached to the stator 45. The board holding portion 50 has a first positioning portion 51 that holds the circuit board 60, and holds the second connection terminals 55 that electrically connect the stator 45 and the circuit board 60. Therefore, the second connection terminals 55 can be disposed close to the circuit board 60, allowing the circuit board 60 to be directly connected to each second connection terminal 55. This makes it possible to effectively prevent an increase in the number of parts of the motor 11 compared to a configuration in which the second connection terminals 55 and the circuit board 60 are electrically connected via other members such as relay terminals and bus bars. This effectively prevents an increase in the number of manufacturing steps and costs for the motor 11.

[0067] Next, the manufacturing direction of the motor 11 of this embodiment will be described. The manufacturing method of the motor 11 of this embodiment includes an attachment process Pa in which the cover member 30 is attached to the housing main body 21. The manufacturing method of the motor 11 includes processes other than the attachment process Pa, such as a process in which the motor section 13 is attached to the housing main body 21. As shown in FIG. 8 , the attachment process Pa includes a first process P1 in which the first positioning section 51 is inserted into the first through-hole 60a of the circuit board 60, a second process P2 in which one of the first positioning section 51 and the second positioning section 35 is fitted into the hole 35a of the other of the first positioning section 51 and the second positioning section 35, and a third process P3 in which the first connection terminal 36f is fitted into the second through-hole 60b of the circuit board 60. In this embodiment, in the second process P2, the first positioning section 51 is fitted into the hole 35a of the second positioning section 35. In the following description, "workers, etc." includes workers who perform each task and assembly equipment, etc. Each task may be performed by workers only, by assembly equipment only, or by both workers and assembly equipment.

[0068] In the first step P1, the worker or the like passes the first positioning portion 51 through the first through-hole 60a of the circuit board 60. As shown in FIG. 9, the worker or the like moves the circuit board 60 downward from the upper side of the housing main body 21, to which the motor unit 13, the board holding unit 50, and the O-ring 81 are previously attached, and passes the first positioning portion 51 axially through each of the first through-holes 60a of the circuit board 60. As shown in FIG. 10, the worker or the like moves the circuit board 60 downward until the circuit board 60 axially contacts the step portions 51d, completing the first step P1. At this time, as described above, the columnar portions 51a are fitted into each of the first through-holes 60a. Therefore, the radial and circumferential positions of the circuit board 60 relative to the board holding unit 50 are determined. Furthermore, as described above, each step portion 51d supports the circuit board 60 in the axial direction. This determines the axial position of the circuit board 60 relative to the board holding part 50. As a result, the circuit board 60 is held by the board holding part 50. Although not shown in the drawings, in the first step P1, the second connection parts 55a of the second connection terminals 55 are fitted into the third through holes 60c of the circuit board 60. As a result, the circuit board 60 is electrically connected to the motor part 13 via the second connection terminals 55.

[0069] In the second step P2, the worker or the like fits the first positioning portion 51 into the hole 35a of the second positioning portion 35. The worker or the like first moves the cover member 30 downward from the upper side of the housing main body 21. At this time, the worker or the like visually checks the radial and circumferential positions of each first positioning portion 51 from the radial outside of the housing main body 21, and can move the cover member 30 downward while adjusting the radial and circumferential positions of the cover member 30 so that each second positioning portion 35 and each first positioning portion 51 overlap in the axial direction. This allows the worker or the like to easily insert the first positioning portion 51 into the hole 35a, as shown in FIG. 11 . Furthermore, as described above, the diameter of the inclined portion 51b, which is the upper portion of the first positioning portion 51, becomes smaller as it extends upward. This makes it easier to insert the inclined portion 51b into the hole 35a compared to when the inclined portion 51b is cylindrical and extends axially. Therefore, the worker or the like can more easily insert the first positioning portion 51 into the hole portion 35a.

[0070] When the worker moves the cover member 30 further downward, the columnar portions 51a of the first positioning portions 51 are inserted into the holes 35a while fitting into the holes 35a. When the upper ends of the columnar portions 51a are fitted into the holes 35a, the radial and circumferential positions of the cover member 30 relative to the board holding portion 50 are determined. As described above, the length Li1 of the portion of the first positioning portion 51 that is disposed inside the holes 35a is longer than the length Li2 of the portion of the first connection terminals 36f that is passed through the second through-holes 60b. Therefore, when the upper ends of the columnar portions 51a are fitted into the holes 35a, that is, when the first positioning portions 51 are fitted into the holes 35a, each of the first connection terminals 36f is positioned above the circuit board 60. Furthermore, when the first positioning portion 51 is fitted into the hole portion 35a, the radial and circumferential positions of the cover member 30 relative to the substrate holding portion 50 are determined as described above, so that the first connection terminals 36f overlap with different second through holes 60b when viewed in the axial direction. When the first positioning portion 51 is fitted into the hole portion 35a of the second positioning portion 35, the second step P2 is completed.

[0071] In the third step P3, the worker or the like fits the first connection terminals 36f into the second through holes 60b of the circuit board 60. As described above, when the second step P2 is completed, the first connection terminals 36f overlap with different second through holes 60b when viewed in the axial direction. In other words, when the third step P3 is started, the radial and circumferential positions of the first connection terminals 36f relative to the second through holes 60b can be accurately aligned. Therefore, the worker or the like can insert each first connection terminal 36f into the second through holes 60b by simply moving the cover member 30 further downward. When the lower ends of the first connection terminals 36f are inserted into the second through holes 60b, the protrusions 33d of the claws 33c of the cover member 30 come into radial contact with the outer circumferential surface of the peripheral wall portion 22 of the housing main body 21. As a result, each of the claws 33c is elastically deformed radially outward. When an operator or the like moves the cover member 30 downward until each of the protrusions 33d and the recessed portions 22c are radially opposed to each other, as shown in FIG. 3, each of the claws 33c is elastically deformed radially inward due to a restoring force acting radially inward. As a result, each of the protrusions 33d enters the recessed portions 22c of the housing main body 21. This attaches the cover member 30 to the housing main body 21. At this time, each of the first connection terminals 36f is fitted into the second through-hole 60b. That is, in the third step P3, an operator or the like can fit each of the first connection terminals 36f into the second through-hole 60b simply by moving the cover member 30 downward. This allows each of the connector terminals 36c to be connected to the circuit board 60. Furthermore, the lower end of the second positioning portion 35 comes into axial contact with the circuit board 60. This allows the axial position of the circuit board 60 relative to the housing 20 to be determined with greater precision. Furthermore, in the third step P3, the worker can attach the cover member 30 to the housing main body 21 simply by moving the cover member 30 downward. The third step P3 is completed when the first connection terminal 36f is fitted into the second through-hole 60b. When the third step P3 is completed, the attachment step Pa is also completed.

[0072] According to this embodiment, the circuit board 60 has a first through hole 60a and a second through hole 60b, and the cover member 30 has a top surface 32 facing the circuit board 60, a second positioning portion 35 extending from the top surface 32 toward the circuit board 60, and a first connection terminal 36f protruding from the top surface 32 toward the circuit board 60 and engaging with the second through hole 60b, and the first positioning portion 51 is passed through the first through hole 60a, and one of the first positioning portion 51 and the second positioning portion 35 has a hole portion 35a into which the other of the first positioning portion 51 and the second positioning portion 35 is engaged, and the length Li1 of the portion of the other of the first positioning portion 51 and the second positioning portion 35 that is positioned inside the hole portion 35a is longer than the length Li2 of the portion of the first connection terminal 36f that is passed through the second through hole 60b. In the attachment step Pa of attaching the cover member 30 to the housing main body 21, the first connection terminal 36f of the cover member 30 is difficult to see from outside the housing 20. Therefore, if the cover member 30 does not have the second positioning portion 35, it is difficult to align the circumferential and radial positions of the first connection terminal 36f with respect to the second through-hole 60b in the third step P3. This makes it difficult to fit the first connection terminal 36f into the second through-hole 60b in the third step P3, which may increase the number of manufacturing steps for the motor 11. In contrast, in the present embodiment, in the second step P2 prior to the third step P3 of fitting the first connection terminal 36f into the second through-hole 60b, the first positioning portion 51 of the board holding portion 50 is fitted into the hole 35a of the second positioning portion 35. As a result, as described above, the radial and circumferential positions of the first connection terminals 36f relative to the second through-holes 60b can be accurately aligned at the start of the third step P3. Therefore, in the third step P3, the first connection terminals 36f can be easily fitted into the second through-holes 60b simply by the simple task of moving the cover member 30 downward. Therefore, an increase in the number of steps required for the third step P3 can be suppressed, and therefore an increase in the number of steps required for manufacturing the motor 11 can be suppressed.

[0073] Furthermore, in this embodiment, as described above, first positioning portion 51 has a substantially cylindrical columnar portion 51a and an inclined portion 51b that protrudes upward from the upper end of columnar portion 51a, with the diameter of inclined portion 51b decreasing upward. Therefore, as described above, in comparison with a case in which inclined portion 51b is a columnar portion extending in the axial direction, inclined portion 51b can be more easily inserted into hole 35a in second step P2, and first positioning portion 51 can be easily inserted into hole 35a. Therefore, an increase in the number of steps in second step P2 can be suppressed, and an increase in the number of steps in manufacturing motor 11 can be more effectively suppressed.

[0074] Unlike the present embodiment, when the first positioning portion 51 has a hole 51f as shown in FIG. 12, the second positioning portion 35 is fitted into the hole 51f of the first positioning portion 51 in the second step P2. Even in this case, by making the length Li1 of the portion of the second positioning portion 35 disposed inside the hole 51f longer than the length Li2 of the portion of the first connection terminal 36f passing through the second through hole 60b, the radial and circumferential positions of the first connection terminal 36f relative to the second through hole 60b can be accurately aligned at the start of the third step P3. Therefore, in the third step P3, each first connection terminal 36f can be easily fitted into the second through hole 60b by simply moving the cover member 30 downward. This prevents an increase in the number of steps required for the third step P3, thereby preventing an increase in the number of steps required for manufacturing the motor 11.

[0075] According to this embodiment, the motor 11 includes a plurality of first positioning portions 51, and the cover member 30 includes a plurality of second positioning portions 35. Each of the first positioning portions 51 and the second positioning portions 35 is located radially outward of the first connection terminal 36f. Therefore, each of the first positioning portions 51 and the second positioning portions 35 can be disposed at a position radially spaced apart from the central axis J. Therefore, even if the circumferential positions of the first positioning portions 51 and the second positioning portions 35 are misaligned relative to the central axis J due to design tolerances or the like, it is easy to reduce the misalignment of the circumferential angle of the second positioning portions 35 relative to the first positioning portions 51. This makes it possible to more effectively reduce the misalignment of the circumferential position of the cover member 30 relative to the circuit board 60, whose radial and circumferential positions are determined by the first positioning portions 51, at the start of the third step P3. Therefore, when the third step P3 is started, the circumferential position of the first connection terminal 36f can be more accurately aligned with respect to the second through-hole 60b. This makes it easier to fit the first connection terminal 36f into the second through-hole 60b in the third step P3. This more effectively prevents an increase in the number of steps required for the third step P3, and more effectively prevents an increase in the number of steps required for manufacturing the motor 11.

[0076] According to this embodiment, the cover member 30 has multiple first connection terminals 36f, and the distance Ld1 between at least one pair of first positioning portions 51 is longer than the distance Lp between the pair of first connection terminals 36f that are located furthest from each other among the multiple first connection terminals 36f. This allows for a larger distance between at least one pair of first positioning portions 51 and at least one pair of second positioning portions 35. Therefore, even if the relative positions of the pair of first positioning portions 51 and the pair of second positioning portions 35 are misaligned due to design tolerances or the like, it is easy to suitably minimize the misalignment of the circumferential angle of the second positioning portions 35 relative to the first positioning portions 51. Therefore, at the start of the third step P3, the circumferential position of the first connection terminals 36f relative to the second through-holes 60b can be more accurately aligned. This makes it easier to fit the first connection terminals 36f into the second through-holes 60b in the third step P3. Therefore, an increase in the number of steps in the third step P3 can be more effectively prevented, and an increase in the number of steps in manufacturing the motor 11 can be more effectively prevented.

[0077] Furthermore, in this embodiment, the distance Ld2 between the second pair of first positioning portions 51 and the distance Ld3 between the third pair of first positioning portions 51 are both longer than the distance Lp between the corresponding pairs of first connection terminals 36f. Therefore, even if the relative positions of the first positioning portions 51 and the second positioning portions 35 are misaligned due to design tolerances or the like, it is easier to more suitably reduce the circumferential angular misalignment of the second positioning portions 35 relative to the first positioning portions 51. This makes it easier to fit the first connection terminals 36f into the second through-holes 60b in the third step P3. This more suitably prevents an increase in the number of steps required for the third step P3, thereby more suitably preventing an increase in the number of steps required for manufacturing the motor 11.

[0078] According to this embodiment, the cover member 30 has claws 33c extending in the extension direction of the second positioning portion 35, and the claws 33c are elastically deformable in a direction intersecting the extension direction of the second positioning portion 35. The housing main body 21 has recesses 22c recessed from the outer peripheral surface of the housing main body 21 in a direction intersecting the extension direction of the claws 33c, and the claws 33c have protrusions 33d disposed inside the recesses 22c. Therefore, as described above, in the third step P3, the cover member 30 can be attached to the housing main body 21 simply by the simple task of moving the cover member 30 downward relative to the housing main body 21. Therefore, compared to a configuration in which the cover member 30 is attached to the housing main body 21 using a fastening member such as a screw, the cover member 30 can be attached to the housing main body 21 more easily. Therefore, an increase in the number of steps in the third step P3 can be more effectively prevented, and an increase in the number of steps in manufacturing the motor 11 can be more effectively prevented.

[0079] Unlike the present embodiment, when the cover member 30 is fixed to the housing main body 21 with a fastening member such as a screw, an operator can adjust the radial and circumferential positions of the first connection terminal 36f relative to the second through hole 60b by visually adjusting the position of a hole provided in the cover member 30 through which the fastening member is passed, relative to the position of an internally threaded hole provided in the housing main body 21 through which the fastening member is fastened. In contrast, in the present embodiment, the housing main body 21 does not have such an internally threaded hole, and the cover member 30 does not have such a hole. Therefore, an operator cannot adjust the radial and circumferential positions of the first connection terminal 36f relative to the second through hole 60b by visually adjusting the position of the relevant hole relative to the relevant internally threaded hole. In contrast, in the present embodiment, as described above, the first positioning portion 51 is fitted into the hole 35a of the second positioning portion 35 in the second step P2. This allows the radial and circumferential positions of the first connection terminal 36f relative to the second through-hole 60b to be accurately aligned at the start of the third step P3. Therefore, in the present embodiment, even if the cover member 30 is attached to the housing main body 21 using the claws 33c, the first connection terminal 36f can be easily fitted into the second through-hole 60b in the third step P3. Furthermore, as described above, the cover member 30 can be attached to the housing main body 21 in the third step P3 simply by the simple task of moving the cover member 30 downward relative to the housing main body 21. This more effectively prevents an increase in the number of steps required for the third step P3 compared to a configuration in which the cover member 30 is attached to the housing main body 21 using fastening members. Therefore, an increase in the number of steps required for manufacturing the motor 11 can be more effectively prevented. Furthermore, in this embodiment, no fastening member is required to fix the cover member 30 to the housing main body 21, so that an increase in the number of parts of the motor 11 can be suppressed.

[0080] According to this embodiment, pump 10 includes motor 11 and pump mechanism 70 connected to rotor 40. As described above, in this embodiment, the radial and circumferential positions of first connection terminals 36f relative to second through-holes 60b can be accurately aligned at the start of third step P3, allowing each first connection terminal 36f to be easily fitted into second through-hole 60b. This prevents an increase in the number of steps required for third step P3, and therefore prevents an increase in the number of steps required for manufacturing pump 10.

[0081] According to this embodiment, the manufacturing method of the motor 11 includes an attachment process Pa of attaching the cover member 30 to the housing main body 21. The attachment process Pa includes a first process P1 of passing the first positioning portion 51 through the first through hole 60a of the circuit board 60, a second process P2 of fitting the first positioning portion 51 into the hole 35a of the second positioning portion 35, and a third process P3 of fitting the first connection terminal 36f into the second through hole 60b of the circuit board 60. Therefore, as described above, in the second process P2, the first positioning portion 51 of the board holding portion 50 is fitted into the hole 35a. This allows the radial and circumferential positions of the first connection terminals 36f relative to the second through hole 60b to be accurately aligned at the start of the third process P3, making it easy to fit each first connection terminal 36f into the second through hole 60b. Therefore, an increase in the number of steps in the third step P3 can be suppressed, and therefore an increase in the number of steps in manufacturing the motor 11 can be suppressed.

[0082] <Modification of the first embodiment> 13, a circuit board 160 included in a motor 111 of this modification has a first through hole 160a. In the following description, the same components as those in the first embodiment described above will be denoted by the same reference numerals, and description thereof will be omitted.

[0083] The first through holes 160a are holes that penetrate the circuit board 160 in the axial direction. When viewed in the axial direction, the first through holes 160a extend in the radial direction. The radially outer ends of the first through holes 160a reach the radially outer edges of the circuit board 160. The first through holes 160a are slit-shaped and extend radially inward from the radially outer edges of the circuit board 160. In this embodiment, the circuit board 160 has three first through holes 160a. The first through holes 160a are arranged at intervals along the circumferential direction. A first positioning portion 51 of the board holding unit 50 passes through each first through hole 160a in the axial direction. Although not shown, a columnar portion 51a passes through each first through hole 160a. When viewed in the axial direction, the radially inner portions of the first through holes 160a have an arc shape that protrudes radially inward. The outer peripheral surface of each columnar portion 51a is in contact with the arc-shaped portion of the first through-hole 160a. This determines the radial and circumferential positions of the circuit board 160 relative to the board holding portion 50. Other configurations of the circuit board 160 of this modified example are similar to other configurations of the circuit board 60 of the first embodiment described above. Other configurations of the pump 110 of this embodiment are similar to other configurations of the pump 10 of the first embodiment described above.

[0084] According to this modification, the first through-holes 160a are slit-shaped extending in the radial direction. Therefore, compared to when the first through-holes 160a are circular as viewed in the axial direction, it is easier to pass the first positioning portions 51 through the first through-holes 160a when attaching the circuit board 160 to the board holding part 50. This makes it easier to prevent an increase in the number of steps required to attach the circuit board 160 to the board holding part 50, and therefore helps prevent an increase in the number of steps required to manufacture the motor 111.

[0085] Second Embodiment 14, a second positioning portion 235 is inserted through a first through-hole 60a of a circuit board 260 of this embodiment. In the following description, the same components as those in the first embodiment described above are denoted by the same reference numerals, and description thereof will be omitted.

[0086] The motor 211 of this embodiment includes a housing 220, a motor unit 13, and a circuit board 260. The housing 220 of this embodiment includes a housing main body 21, a lid member 230, a board accommodating unit 20a, a pump cover unit 38 (see FIG. 1), and a board holding unit 250.

[0087] The cover member 230 accommodates the circuit board 260 therein. The cover member 230 has a cover main body 31, a second positioning portion 235, and a connector portion 36 (see FIG. 1). The second positioning portion 235 has a generally cylindrical shape extending downward from the top surface 32. The second positioning portion 235 extends from the top surface 32 toward the circuit board 260. Although not shown, in this embodiment, the cover member 230 has multiple second positioning portions 235. That is, the motor 211 is equipped with multiple second positioning portions 235. Although not shown, in this embodiment, the cover member 230 has three second positioning portions 235. The second positioning portion 235 has a columnar portion 235a and an inclined portion 235b.

[0088] The columnar portion 235a has a generally cylindrical shape that protrudes downward from the top surface portion 32. The inclined portion 235b has a generally cylindrical shape that protrudes downward from the lower end of the columnar portion 235a. The diameter of the inclined portion 235b decreases downward. In other words, the outer peripheral surface of the inclined portion 235b is positioned radially inward of the second positioning portion 235 as it protrudes downward. In this embodiment, different second positioning portions 235 are passed through each first through hole 60a in the axial direction. In other words, either the first positioning portion 251 or the second positioning portion 235 is passed through each first through hole 60a. More specifically, the columnar portion 235a is passed through the first through hole 60a in the axial direction. Other configurations of the lid member 230 of this embodiment are similar to those of the lid member 30 of the first embodiment described above.

[0089] The board holding part 250 has an annular part 50a, a plurality of leg parts 50b (see FIG. 3), a first positioning part 251, a second terminal holding part 52 (see FIG. 7), a first protrusion 53a (see FIG. 7), and a second protrusion 53b (see FIG. 7). That is, the motor 211 has the first positioning part 251.

[0090] The first positioning portion 251 has a generally cylindrical shape that protrudes upward from the annular portion 50a. In the present embodiment, the first positioning portion 251 is located below the circuit board 260. The first positioning portion 251 supports the circuit board 260 in the axial direction. This determines the axial position of the circuit board 260 relative to the board holding portion 250. In the present embodiment, the first positioning portion 251 is provided with a hole 251f. The hole 251f is recessed downward from the surface of the first positioning portion 251 facing upward. When viewed in the axial direction, the hole 251f has a generally circular shape.

[0091] Although not shown, in this embodiment, the substrate holding part 250 has a plurality of first positioning parts 251. That is, the motor 211 is equipped with a plurality of first positioning parts 251. In this embodiment, the substrate holding part 250 has three first positioning parts 251. In this embodiment, each second positioning part 235 is inserted into a hole 251f of a different first positioning part 251. A lower part of the columnar part 235a is fitted into the hole 251f. As a result, each second positioning part 235 is fitted into the hole 251f. That is, the first positioning part 251 has a hole 251f into which the second positioning part 235 is fitted. That is, one of the first positioning part 251 and the second positioning part 235 has a hole 251f into which the other of the first positioning part 251 and the second positioning part 235 is fitted. This determines the radial and circumferential positions of the cover member 230 relative to the substrate holding part 250. Therefore, the radial and circumferential positions of each first connection terminal 36f relative to the substrate holding part 250 are determined. In this embodiment, the length Li1 of the portion of the second positioning part 235 that is disposed inside the hole 251f is longer than the length Li2 of the portion of the first connection terminal 36f that is passed through the second through-hole 60b. Other configurations of the substrate holding part 250 of this embodiment are similar to those of the substrate holding part 50 of the first embodiment described above.

[0092] The circuit board 260 has a first through hole 60a, a second through hole 60b, a third through hole 60c, and a fourth through hole (not shown). The fourth through hole is a hole that penetrates the circuit board 260 in the axial direction. The fourth through hole may be a hole that is recessed upward from the downward surface of the circuit board 260. The circuit board 260 has two fourth through holes. A first protrusion 53a (see FIG. 7) of the board holding part 250 is fitted into one of the fourth through holes. A second protrusion 53b (see FIG. 7) of the board holding part 250 is fitted into the other fourth through hole. These determine the radial and circumferential positions of the circuit board 260 relative to the board holding part 250. The circuit board 260 is held by the board holding part 250. Other configurations of the circuit board 260 of this embodiment are similar to those of the circuit board 60 of the first embodiment described above. Other configurations of the pump 210 of this embodiment are similar to other configurations of the pump 10 of the first embodiment described above.

[0093] According to the present embodiment, the second positioning portion 235 is passed through the first through hole 60a, one of the first positioning portion 251 and the second positioning portion 235 has a hole 251f into which the other of the first positioning portion 251 and the second positioning portion 235 is fitted, and a length Li1 of a portion of the other of the first positioning portion 251 and the second positioning portion 235 that is disposed inside the hole 251f is longer than a length Li2 of a portion of the first connection terminal 36f that is passed through the second through hole 60b. Therefore, similar to the first embodiment described above, in the second step P2 prior to the third step P3 of fitting the first connection terminal 36f into the second through hole 60b, the second positioning portion 235 of the cover member 230 is fitted into the hole 251f of the first positioning portion 251. This allows the radial and circumferential positions of the first connection terminals 36f to be accurately aligned with respect to the second through-holes 60b at the start of the third step P3. Therefore, in the third step P3, the first connection terminals 36f can be easily fitted into the second through-holes 60b simply by the simple task of moving the cover member 230 downward. This prevents an increase in the number of steps required for the third step P3, and therefore prevents an increase in the number of steps required for manufacturing the motor 211.

[0094] The present invention is not limited to the above-described embodiment, and other configurations and methods may be adopted within the scope of the technical concept of the present invention. For example, the number of first positioning portions of the housing main body and the number of second positioning portions of the cover member are not limited to three, and may be two or less, or four or more. Furthermore, if the first positioning portions are polygonal prisms such as square prisms, the first through holes are polygonal prisms such as square prisms, and the hole portions are polygonal prisms such as square prisms, a single first positioning portion can determine the radial and circumferential positions of the circuit board relative to the board holding portion, and the radial and circumferential positions of the cover member relative to the board holding portion. Therefore, if the first positioning portions are polygonal prisms, the first through holes are polygonal prisms, and the hole portions are polygonal prisms, the number of first positioning portions and the number of second positioning portions may each be one.

[0095] The number of first connection terminals provided on the cover member may be four or less, or may be six or more.

[0096] The number of flanges provided on the housing body may be 2, or may be 4 or more. The flanges may be provided on the cover member.

[0097] The use of a motor to which the present invention is applied is not particularly limited. The motor may be mounted in equipment other than a pump. The use of a pump including a motor to which the present invention is applied is not particularly limited. The type of fluid pumped by the pump is not particularly limited, and may be water, etc. The motor and pump may be mounted in equipment other than a vehicle. Note that the configurations and methods described in this specification can be combined as appropriate within the scope of not being mutually inconsistent.

[0098] The present technology can be configured as follows. (1) A motor unit including a rotor rotatable about a central axis and a stator facing the rotor across a gap; a circuit board electrically connected to the motor unit; a housing having a housing main body that accommodates the motor unit, a board accommodating portion that accommodates the circuit board, and a cover member attached to the housing main body; and a first positioning portion disposed on the board accommodating portion, wherein the circuit board has a first through hole and a second through hole, and the cover member has a top surface that faces the circuit board and a second through hole that extends from the top surface toward the circuit board. a positioning portion; and a first connection terminal that protrudes from the top surface portion toward the circuit board and is fitted into the second through hole, wherein either the first positioning portion or the second positioning portion is passed through the first through hole, one of the first positioning portion and the second positioning portion has a hole into which the other of the first positioning portion and the second positioning portion is fitted, and the length of the portion of the other of the first positioning portion and the second positioning portion that is positioned inside the hole is longer than the length of the portion of the first connection terminal that is passed through the second through hole. (2) The motor according to (1), wherein the first positioning portion is passed through the first through hole. (3) A motor as described in (1) or (2), which includes a plurality of the first positioning portions, the cover member has a plurality of the second positioning portions, and each of the plurality of the first positioning portions and the plurality of the second positioning portions is located radially outward from the first connection terminal. (4) The motor described in (3), wherein the cover member has a plurality of the first connection terminals, and the distance between at least one pair of the first positioning portions is longer than the distance between the pair of first connection terminals that are located farthest from each other among the plurality of the first connection terminals. (5) A motor described in any one of (1) to (4), wherein the cover member has a claw portion extending in the direction in which the second positioning portion extends, the claw portion being elastically deformable in a direction intersecting the direction in which the second positioning portion extends, the housing main body portion has a recess recessed from the outer surface of the housing main body portion in a direction intersecting the direction in which the claw portion extends, and the claw portion has a protrusion positioned inside the recess. (6) The motor according to any one of (1) to (5), wherein the first positioning portion has a step portion facing the circuit board, and the circuit board is disposed between the step portion and the second positioning portion. (7) A motor described in any one of (1) to (6), wherein the housing has a board holding portion attached to the stator, the board holding portion has the first positioning portion, and holds a second connection terminal that electrically connects the stator and the circuit board. (8) The motor described in any one of (1) to (7), wherein the cover member has a connector portion connected to the top surface portion, the connector portion has a connector terminal exposed to the outside of the housing, and the first connection terminal is a part of the connector terminal. (9) A pump comprising the motor according to any one of (1) to (8) and a pump mechanism connected to the rotor. (10) A method for manufacturing a motor including a motor section having a rotor rotatable about a central axis and a stator facing the rotor with a gap therebetween, a circuit board electrically connected to the motor section, a housing having a housing main body section that accommodates the motor section, a board accommodating section that accommodates the circuit board, and a cover member attached to the housing main body section, and a first positioning section disposed on the board accommodating section, the method including a mounting step of mounting the cover member to the housing main body section, and the cover member being configured to be connected to the circuit board. a first positioning portion extending from the top surface portion toward the circuit board; and a first connection terminal protruding from the top surface portion toward the circuit board, wherein the mounting process includes a first process of passing the first positioning portion through a first through hole formed in the circuit board, a second process of fitting one of the first positioning portion and the second positioning portion into a hole formed in the other of the first positioning portion and the second positioning portion, and a third process of fitting the first connection terminal into the second through hole formed in the circuit board. [Explanation of symbols]

[0099] 10,110,210...pump, 11,111,211...motor, 13...motor portion, 20,220...housing, 20a...board accommodating portion, 21...housing main body portion, 22c...recess, 30,230...lid member, 32...top surface portion, 33c...claw portion, 33d...protrusion portion, 35,235...second positioning portion, 35a,51f,251f...hole portion, 36f...first connection terminal, 36...connector portion, 36c...connector terminal, 40...rotor, 45...stator, 50, 250...board holding portion, 51, 251...first positioning portion, 51d...step portion, 55...second connection terminal, 60, 160, 260...circuit board, 60a, 160a...first through hole, 60b...second through hole, 70...pump mechanism portion, J...central axis, P1...first step, P2...second step, P3...third step, Pa...mounting step

Claims

1. a motor section including a rotor rotatable about a central axis and a stator facing the rotor with a gap therebetween; a circuit board electrically connected to the motor unit; a housing including a housing main body that accommodates the motor, a board accommodating portion that accommodates the circuit board, and a lid member that is attached to the housing main body; a first positioning portion disposed in the substrate accommodating portion; Equipped with the circuit board has a first through hole and a second through hole; The cover member is a top surface portion facing the circuit board; a second positioning portion extending from the top surface portion toward the circuit board; a first connection terminal that protrudes from the top surface portion toward the circuit board and is fitted into the second through hole; and Either the first positioning portion or the second positioning portion is passed through the first through hole, one of the first positioning portion and the second positioning portion has a hole into which the other of the first positioning portion and the second positioning portion is fitted, A motor, wherein the length of the other of the first positioning portion and the second positioning portion that is positioned inside the hole portion is longer than the length of the portion of the first connection terminal that is passed through the second through hole.

2. The motor according to claim 1 , wherein the first positioning portion is inserted through the first through hole.

3. a plurality of the first positioning portions; the cover member has a plurality of the second positioning portions, The motor according to claim 1 , wherein each of the first positioning portions and the second positioning portions is located radially outward of the first connection terminal.

4. the cover member has a plurality of the first connection terminals, The motor according to claim 3 , wherein the distance between at least one pair of the first positioning portions is longer than the distance between a pair of the first connection terminals that are located farthest from each other among the plurality of first connection terminals.

5. the cover member has a claw portion extending in a direction in which the second positioning portion extends, the claw portion is elastically deformable in a direction intersecting a direction in which the second positioning portion extends, the housing body has a recess recessed from an outer peripheral surface of the housing body in a direction intersecting a direction in which the claw portion extends, The motor according to claim 1 , wherein the claw portion has a protrusion disposed within the recess.

6. the first positioning portion is provided with a step portion facing the circuit board, The motor according to claim 2 , wherein the circuit board is disposed between the step portion and the second positioning portion.

7. the housing has a substrate holding portion attached to the stator, The motor according to claim 1 , wherein the board holder has the first positioning portion and holds a second connection terminal that electrically connects the stator and the circuit board.

8. the cover member has a connector portion connected to the top surface portion, the connector portion has connector terminals exposed to the outside of the housing, The motor according to claim 1 , wherein the first connection terminal is a part of the connector terminal.

9. A pump comprising: the motor according to claim 1; and a pump mechanism connected to the rotor.

10. A method for manufacturing a motor including: a motor section having a rotor rotatable about a central axis and a stator facing the rotor with a gap therebetween; a circuit board electrically connected to the motor section; a housing having a housing main body section that accommodates the motor section, a board accommodating section that accommodates the circuit board, and a lid member attached to the housing main body section; and a first positioning section that is disposed in the board accommodating section, an attachment step of attaching the cover member to the housing main body; the cover member has a top surface portion facing the circuit board, a second positioning portion extending from the top surface portion toward the circuit board, and a first connection terminal protruding from the top surface portion toward the circuit board, The attaching step includes: a first step of passing the first positioning portion through a first through hole of the circuit board; a second step of fitting one of the first positioning portion and the second positioning portion into a hole formed in the other of the first positioning portion and the second positioning portion; a third step of fitting the first connection terminal into a second through hole of the circuit board; A method for manufacturing a motor comprising the steps of:

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