Rotating electric machines and pumps

Abstract

To provide a rotary electric machine and a pump having a structure capable of suppressing enlargement.SOLUTION: A rotary electric machine according to an embodiment of the present invention includes a rotor rotatable about a central axis J, a stator positioned radially outside the rotor and surrounding the rotor, a circuit board 80 located on one axial side of the stator, and a cover 120 positioned axially between the stator and the circuit board 80, the cover 120 includes a cover body positioned between the stator and the circuit board 80 in the axial direction, and a projecting portion 124 projecting from the cover body to one side in the axial direction, the projecting portion 124 includes a support portion connected to the cover body, and a crimped portion 124e having a width smaller than that of the support portion and crimped in a direction intersecting the axial direction, and the support portion is in contact with the circuit board from the other side in the axial direction. The crimped portion 124e has a contact portion 124c that contacts the circuit board 80 from one side in the axial direction.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a rotating electric machine and a pump. [Background technology]

[0002] 2. Description of the Related Art Rotating electric machines are known that include a substrate support portion that supports a substrate. For example, Patent Document 1 describes an actuator that includes a motor as such a rotating electric machine. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2019-75872 Summary of the Invention [Problem to be solved by the invention]

[0004] In the rotating electric machine described above, the board support portion is provided on, for example, a housing. Therefore, there is a risk that the housing will be increased in size by the amount of the board support portion provided, and therefore there is a risk that the rotating electric machine will be increased in size.

[0005] In view of the above circumstances, an object of the present invention is to provide a rotating electric machine and a pump having a structure that can prevent the machine from becoming large. [Means for solving the problem]

[0006] One aspect of the rotating electric machine of the present invention includes a rotor rotatable about a central axis, a stator positioned radially outward of the rotor and surrounding the rotor, a circuit board positioned on one axial side of the stator, and a cover positioned axially between the stator and the circuit board. The cover has a cover main body portion positioned axially between the stator and the circuit board, and a protrusion portion protruding from the cover main body portion to one axial side. The protrusion portion has a support portion connected to the cover main body portion and a crimped portion that is narrower than the support portion and is crimped in a direction intersecting the axial direction. The support portion contacts the circuit board from the other axial side. The crimped portion has a contact portion that contacts the circuit board from one axial side.

[0007] One aspect of the pump of the present invention includes the above-described rotating electric machine and a pump portion connected to the other axial side of the rotor. [Effects of the Invention]

[0008] According to one aspect of the present invention, it is possible to prevent the rotating electric machine from becoming large in size. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a cross-sectional view showing a pump according to a first embodiment. [Figure 2] FIG. 2 is a perspective view showing the support member of the first embodiment. [Figure 3] FIG. 3 is a perspective view showing a support member, a stator, a fixing member, and a cover according to the first embodiment. [Figure 4] FIG. 4 is a perspective view showing the support member, the fixing member, the cover, and the circuit board of the first embodiment. [Figure 5] FIG. 5 is a perspective view showing the circuit board of the first embodiment. [Figure 6] FIG. 6 is an exploded perspective view showing the fixing member and the cover of the first embodiment. [Figure 7] FIG. 7 is a cross-sectional perspective view showing the circuit board and the protrusion of the first embodiment. [Figure 8] FIG. 8 is a partial cross-sectional perspective view showing a circuit board, a protruding portion, and a covering portion according to the second embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0010] Each figure shows an imaginary central axis J of a pump according to an embodiment described below. In the following description, the axial direction of the central axis J will be simply 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 Z axis shown in each figure indicates the direction in which the central axis J extends. In the following description, the side of the axial direction toward which the arrow of the Z axis points (+Z side) will be referred to as the "upper side," and the side of the axial direction opposite to the side toward which the arrow of the Z axis points (-Z side) will be referred to as the "lower side."

[0011] In this embodiment, the upper side corresponds to "one axial side," and the lower side corresponds to "the other axial side." Note that the terms "upper side" and "lower side" are simply names used to describe the relative positional relationships of the various components, and the actual positional relationships may be other than those indicated by these names. For the sake of explanation, FIG. 1 shows cross sections at different circumferential positions on both the left and right sides of the central axis J.

[0012] First Embodiment The pump 100 of this embodiment shown in FIG. 1 is a water pump that pumps water. As shown in FIG. 1, the pump 100 of this embodiment includes a rotating electric machine 100a and a pump unit 60. In this embodiment, the rotating electric machine 100a is a motor. The rotating electric machine 100a includes a housing 110, a fixed member 30, a cover 120, a fixed shaft 40, a rotor 50, a stator 70, and a circuit board 80. In other words, the pump 100 includes the housing 110, the fixed member 30, the cover 120, the fixed shaft 40, the rotor 50, the stator 70, and the circuit board 80.

[0013] The housing 110 accommodates the fixed member 30, the cover 120, the fixed shaft 40, the rotor 50, the stator 70, and the circuit board 80. The housing 110 has a support member 10 and a cover member 20. In other words, the pump 100 comprises the support member 10 and the cover member 20. The support member 10 and the cover member 20 are fixed to each other in the axial direction.

[0014] The support member 10 is located below the cover member 20. The support member 10 is made of a non-magnetic material. In this embodiment, the support member 10 is made of resin. As shown in FIG. 2, the support member 10 has a base portion 10a, a rotor accommodating portion 12, a substrate fixing portion 17b, and a connector portion 19. As shown in FIG. 1, the base portion 10a covers the stator 70 from below. The base portion 10a has a bottom wall portion 11, an annular wall portion 14, and a flange portion 16.

[0015] The bottom wall portion 11 has an annular shape surrounding the central axis J. The bottom wall portion 11 is located below the stator 70. A recess 11a that is recessed upward is provided in a radially inner portion of the lower surface of the bottom wall portion 11. The recess 11a has an annular shape surrounding the central axis J. The recess 11a is open radially inward.

[0016] The rotor accommodating portion 12 extends upward from the bottom wall portion 11. More specifically, the rotor accommodating portion 12 extends upward from the radially inner peripheral edge portion of the bottom wall portion 11. The rotor accommodating portion 12 is cylindrical and surrounds the central axis J, opening downward. The rotor accommodating portion 12 is located radially inside the stator 70. The rotor accommodating portion 12 accommodates the rotor 50 therein. The rotor accommodating portion 12 is made of a non-magnetic material. In this embodiment, the rotor accommodating portion 12 is made of resin. The rotor accommodating portion 12 has a second lid portion 12a that covers the rotor 50 from above, and a cylindrical portion 12b that extends downward from the second lid portion 12a.

[0017] The second cover portion 12a is disk-shaped and centered on the central axis J. The second cover portion 12a has a holding portion 12c on its lower surface. The holding portion 12c is a portion that holds the upper end of the fixed shaft 40. The holding portion 12c protrudes downward. The holding portion 12c has a cover portion 12d that covers at least a portion of the inner surface of a hole portion 43 (described later) of the fixed shaft 40. The cover portion 12d is located inside the hole portion 43. The cover portion 12d is in contact with the inner surface of the hole portion 43. In this embodiment, the cover portion 12d is in contact with the entire inner surface of the hole portion 43. The cover portion 12d fills the hole portion 43. More specifically, the cover portion 12d fills the entire hole portion 43 except for a fastening hole 12e (described later). In this embodiment, the cover portion 12d is cylindrical and centered on the central axis J. The cover portion 12d protrudes downward from a portion of the holding portion 12c that is positioned radially outward from the cover portion 12d. The lower end of the cover portion 12d is positioned above the lower end of the cylindrical portion 12b.

[0018] 2, the second cover portion 12a has a plurality of recesses 12f recessed downward from a radially outer portion on the upper surface of the second cover portion 12a. The recesses 12f are arranged at equal intervals around the circumference.

[0019] The cylindrical portion 12b extends downward from the radially outer peripheral edge of the second cover portion 12a and is connected to the radially inner peripheral edge of the bottom wall portion 11. As shown in FIG. 1, the cylindrical portion 12b is located between the rotor 50 and the stator 70 in the radial direction. The cylindrical portion 12b is open on the downward side. The radial thickness of the wall portion constituting the cylindrical portion 12b is smaller than the axial thickness of the second cover portion 12a. Note that the radial thickness of the wall portion constituting the cylindrical portion 12b may be larger than the axial thickness of the second cover portion 12a or may be the same as the axial thickness of the second cover portion 12a.

[0020] A fastening hole 12e is provided in the rotor accommodating portion 12. The fastening hole 12e is a circular hole centered on the central axis J and recessed downward from the upper surface of the second cover portion 12a. The fastening hole 12e extends to the cover portion 12d. The fastening hole 12e is a hole with a bottom on the lower side. The lower end of the fastening hole 12e is located lower than the portion of the holding portion 12c other than the cover portion 12d. The lower end of the fastening hole 12e is located lower than the upper end of the rotor 50. The lower end of the fastening hole 12e may be located higher than the upper end of the rotor 50, or may be located at the same axial position as the upper end of the rotor 50.

[0021] As shown in FIG. 2, the annular wall portion 14 protrudes upward from the bottom wall portion 11. More specifically, the annular wall portion 14 protrudes upward from the radially outer peripheral edge portion of the bottom wall portion 11. The annular wall portion 14 has a circular ring shape surrounding the central axis J. The upper end portion of the annular wall portion 14 is located lower than the upper end portion of the rotor accommodating portion 12. As shown in FIG. 1, the annular wall portion 14 is located radially outside the stator 70. The annular wall portion 14 surrounds the stator 70 from the radially outside.

[0022] As shown in FIG. 2, the annular wall portion 14 is provided with fixed portions 14a, 14b. The fixed portions 14a, 14b are generally cylindrical and extend in the axial direction. The fixed portions 14a, 14b have fastening holes 14d recessed downward from the upper surfaces of the fixed portions 14a, 14b. A plurality of the fixed portions 14a and a plurality of the fixed portions 14b are provided at intervals in the circumferential direction. At least a portion of the fixed portions 14a and at least a portion of the fixed portions 14b are alternately arranged in the circumferential direction. For example, six fixed portions 14a are provided. For example, four fixed portions 14b are provided. The number and arrangement of the fixed portions 14a, 14b are not particularly limited.

[0023] An engagement protrusion 14c that protrudes upward is provided on the upper surface of the annular wall portion 14. That is, in this embodiment, the support member 10 has an engagement protrusion 14c that protrudes in the axial direction. In this embodiment, the engagement protrusion 14c is cylindrical. A plurality of engagement protrusions 14c are provided at intervals in the circumferential direction. In this embodiment, the engagement protrusion 14c is located between the fixed portion 14a and the fixed portion 14b that are adjacent in the circumferential direction. For example, four engagement protrusions 14c are provided. A rib 14e that protrudes radially inward is provided in the portion of the annular wall portion 14 where the engagement protrusion 14c is provided.

[0024] The flange portion 16 extends radially outward from the annular wall portion 14. The flange portion 16 is annular and surrounds the central axis J. A cover member 20 is fixed to the flange portion 16 from above. The flange portion 16 is a portion that is fixed to a device to which the pump 100 is attached. A connector portion 19 is provided on the flange portion 16.

[0025] The board fixing portion 17b is a portion to which the circuit board 80 is fixed. The board fixing portion 17b has a cylindrical shape that protrudes upward from the radial outer peripheral edge of the second lid portion 12a. A pair of board fixing portions 17b are provided with a central axis J sandwiched between them in the radial direction. As shown in FIG. 3, the board fixing portion 17b protrudes upward beyond the cover 120 through a second through-hole 121d (described later) provided in the cover 120. As shown in FIG. 1, a fastening hole 17c is provided on the upper end surface of the board fixing portion 17b, into which a third screw 93 for fixing the circuit board 80 is fastened. The third screw 93 is a bolt having a screw head. The third screw 93 for fixing the circuit board 80 is, for example, a tapping screw. Before the third screw 93 is fastened, no thread is provided on the inner peripheral surface of the fastening hole 17c. The inner peripheral surface of the fastening hole 17c is threaded by fastening the third screw 93 into the fastening hole 17c.

[0026] As shown in FIG. 1 , the lid member 20 is fixed to the upper side of the support member 10. In this embodiment, the lid member 20 is made of metal. The lid member 20 is container-shaped and open to the bottom. The lid member 20 has a first lid portion 21 that covers the circuit board 80 from above, an outer circumferential wall portion 22 that extends downward from the radially outer circumferential edge of the first lid portion 21, and a flange portion 23 that protrudes radially outward from the lower end of the outer circumferential wall portion 22. In other words, the housing 110 has the first lid portion 21, the outer circumferential wall portion 22, and the flange portion 23. The flange portion 23 is fixed to the upper side of the flange portion 16 of the support member 10. An O-ring 95 seals the gap between the flange portion 23 and the flange portion 16 in the axial direction.

[0027] The first cover portion 21 has a first pressing portion 24 and a second pressing portion 25. The first pressing portion 24 and the second pressing portion 25 are pressing portions that contact a contact portion 124c (described later) from above. The first pressing portion 24 and the second pressing portion 25 are located on the radially outer peripheral edge portion of the underside of the first cover portion 21. The first pressing portion 24 and the second pressing portion 25 are generally cylindrical and protrude downward. Although not shown, a plurality of first pressing portions 24 are provided at intervals in the circumferential direction. For example, four first pressing portions 24 are provided. The plurality of first pressing portions 24 are located above each of a plurality of second through portions 80b (described later). The radially outer portion of the second pressing portion 25 is connected to the outer peripheral wall portion 22. Although not shown, a pair of second pressing portions 25 are provided radially sandwiching the central axis J. The pair of second pressing portions 25 are respectively located radially outward of a pair of linear portions 80f, which will be described later, when viewed in the axial direction.

[0028] As shown in FIG. 1 , the fixed shaft 40 extends in the axial direction. The fixed shaft 40 is cylindrical and centered on the central axis J. The upper end of the fixed shaft 40 is held by the holding portion 12c. This fixes the fixed shaft 40 to the rotor accommodating portion 12. In this embodiment, the upper end of the fixed shaft 40 is embedded and held in the holding portion 12c. The holding portion 12c is made by insert molding, with the fixed shaft 40 as an insert member. The fixed shaft 40 extends downward from the holding portion 12c. The lower end of the fixed shaft 40 is located below the rotor accommodating portion 12.

[0029] A hole 43 recessed downward is provided at the upper end of the fixed shaft 40. The hole 43 is a circular hole having a bottom on the lower side and centered on the central axis J. The lower end of the hole 43 is located lower than the upper end of the rotor 50. A cover portion 12d is located within the hole 43. A slip washer 44 and an O-ring 45 are attached to the outer circumferential surface of a portion of the fixed shaft 40 located lower than the rotor accommodating portion 12. The slip washer 44 is disposed opposite the lower side of an extension portion 53b of the rotor 50, which will be described later. The O-ring 45 is attached to a portion of the fixed shaft 40 located lower than the portion to which the slip washer 44 is attached.

[0030] The fixed shaft 40 has a cylindrical fixed shaft main body 41 extending in the axial direction, and a fixed shaft flange 42 protruding radially outward from the upper end of the fixed shaft main body 41. The fixed shaft flange 42 is annular and surrounds the central axis J. The upper end of the fixed shaft main body 41 and the fixed shaft flange 42 are embedded and held in the holding portion 12c. By embedding the fixed shaft flange 42 in the holding portion 12c, the fixed shaft flange 42 is caught on the holding portion 12c in the axial direction. This prevents the fixed shaft 40 from slipping out downward from the holding portion 12c.

[0031] The rotor 50 is rotatable about the central axis J. The rotor 50 is housed inside the rotor housing portion 12. The rotor 50 has a rotor core 51, a magnet 52, and a resin portion 53. The rotor core 51 is annular and surrounds the central axis J. A fixed shaft 40 passes through the radially inner side of the rotor core 51 in the axial direction. The magnet 52 is fixed to the rotor core 51. Although not shown, a plurality of magnets 52 are provided, for example, spaced apart in the circumferential direction.

[0032] The resin portion 53 has a cylindrical shape that surrounds the central axis J and extends in the axial direction. The fixed shaft 40 passes through the radially inner side of the resin portion 53 in the axial direction. The fixed shaft 40 is loosely fitted into the radially inner side of the resin portion 53. The fixed shaft 40 supports the inner circumferential surface of the resin portion 53, thereby rotatably supporting the rotor 50. The resin portion 53 has a resin main body portion 53a in which the rotor core 51 and the magnets 52 are embedded and held, and an extension portion 53b extending downward from the resin main body portion 53a. The resin main body portion 53a covers the entire rotor core 51 and the entire magnets 52. The resin main body portion 53a has a portion located radially between the fixed shaft 40 and the rotor core 51. The outer diameter of the extension portion 53b is smaller than the outer diameter of the resin main body portion 53a. The lower end of the extension portion 53b protrudes downward from the rotor accommodating portion 12. The inner diameter of the resin main body 53a and the inner diameter of the extension 53b are the same.

[0033] The outer peripheral surface of the resin portion 53 is the outer peripheral surface of the rotor 50. The outer peripheral surface of the resin portion 53 is located radially inwardly away from the inner peripheral surface of the rotor accommodating portion 12. The outer peripheral surface of the resin main body portion 53a faces the inner peripheral surface of the rotor accommodating portion 12, i.e., the inner peripheral surface of the cylindrical portion 12b, with a small gap between them.

[0034] The pump portion 60 is connected to the underside of the rotor 50. In this embodiment, the pump portion 60 is an impeller. The pump portion 60 is made of resin. The pump portion 60 includes an impeller body portion 61 and a shroud portion 62. In this embodiment, the impeller body portion 61 is connected to the lower end of the extension portion 53b. The resin portion 53 and the impeller body portion 61 are part of the same single member. The resin portion including the resin portion 53 and the impeller body portion 61 is formed, for example, by insert molding using the rotor core 51 and the magnet 52 as insert members. The impeller body portion 61 includes a base portion 61a extending radially outward from the outer peripheral surface of the extension portion 53b and a plurality of blades 63 provided on the lower surface of the base portion 61a. The upper end of the base portion 61a is located within a recess 11a provided in the bottom wall portion 11.

[0035] The shroud portion 62 is a separate member from the impeller main body 61. The shroud portion 62 is fixed to the underside of the impeller main body 61. The shroud portion 62 has an annular portion 62a that surrounds the central axis J, and a cylindrical portion 62b that extends downward from the radially inner peripheral edge of the annular portion 62a. The annular portion 62a is disposed below and spaced from the radially outer portion of the base portion 61a.

[0036] The pump section 60 has an intake port 64 and an outlet port 65. The intake port 64 is at the lower end of the cylindrical section 62b and opens downward. The outlet port 65 is provided axially between the radially outer end of the base section 61a and the radially outer end of the annular section 62a. The outlet port 65 opens radially outward. When rotated around the central axis J by the rotor 50, the pump section 60 draws water into the interior through the intake port 64 and discharges it from the outlet port 65, thereby delivering the water. The water delivered by the pump section 60 also flows into the inside of the rotor accommodating section 12.

[0037] The stator 70 is located radially outside the rotor 50. The stator 70 is annular and surrounds the rotor accommodating portion 12 and the rotor 50 radially outside the rotor accommodating portion 12. The stator 70 is located radially between the rotor accommodating portion 12 and the annular wall portion 14. The stator 70 has a stator core 71, an insulator 72 attached to the stator core 71, and a plurality of coils 73 attached to the stator core 71 via the insulator 72.

[0038] The stator core 71 is located radially outside the rotor accommodating portion 12 and surrounds the rotor core 51. The stator core 71 includes an annular core back 71a surrounding the rotor core 51 and multiple teeth 71b extending radially inward from the core back 71a. Although not shown, the multiple teeth 71b are arranged side by side in the circumferential direction. The core back 71a, excluding its upper end, is press-fitted and fixed into a peripheral wall portion 31 (described later) of the fixing member 30. This secures the stator 70 to the fixing member 30. The radially inner ends of the multiple teeth 71b face the outer circumferential surface of the cylindrical portion 12b of the rotor accommodating portion 12 with a small gap between them. That is, in this embodiment, the stator 70 is arranged in a non-contact state with the outer circumferential surface of the cylindrical portion 12b. In this embodiment, the stator 70, which is located radially outward from the outer circumferential surface of the cylindrical portion 12b, does not directly contact the rotor accommodating portion 12.

[0039] The insulators 72 and the coils 73 protrude axially from the stator core 71. The portions of the insulators 72 and the coils 73 that protrude downward from the stator core 71 are located radially between the cylindrical portion 12b and the annular wall portion 14 of the rotor accommodating portion 12. The portions of the insulators 72 and the coils 73 that protrude downward from the stator core 71 are located radially away from the outer peripheral surface of the cylindrical portion 12b and the inner peripheral surface of the annular wall portion 14, and are disposed opposite the upper side of the bottom wall portion 11.

[0040] The stator 70 protrudes on both axial sides beyond the fixing member 30. More specifically, the upper end of the stator core 71 of the stator 70, the portion of the insulator 72 positioned above the stator core 71, and the portion of the coil 73 positioned above the stator core 71 protrude upward beyond the fixing member 30. A portion of the portion of the insulator 72 positioned below the stator core 71 and a portion of the portion of the coil 73 positioned below the stator core 71 protrude downward beyond the fixing member 30.

[0041] The circuit board 80 is located above the rotor 50 and the stator 70. The circuit board 80 is housed radially inside the cover member 20. The circuit board 80 is plate-shaped with its plate surface facing the axial direction. As shown in FIGS. 4 and 5, the circuit board 80 is substantially circular and centered on the central axis J. More specifically, the circuit board 80 has a shape such that the outer circumferential edge of a circle centered on the central axis J is cut out along a straight line on both sides of the central axis J in the radial direction.

[0042] As shown in FIG. 5, the outer edge of the circuit board 80 has a pair of straight line portions 80f that radially sandwich the central axis J, and a pair of arcuate portions 80g that radially sandwich the central axis J. The pair of straight line portions 80f extend parallel to each other in directions perpendicular to the axial and radial directions. One ends of the pair of straight line portions 80f are connected to one of the pair of arcuate portions 80g. The other ends of the pair of straight line portions 80f are connected to the other of the pair of arcuate portions 80g. The pair of arcuate portions 80g are arc-shaped with the central axis J as their center.

[0043] The circuit board 80 has first through portions 80a that penetrate the circuit board 80 in the axial direction. The first through portions 80a are provided on the radially outer side of the circuit board 80. In this embodiment, the first through portions 80a are rectangular holes that are long in directions perpendicular to both the axial direction and the radial direction. A plurality of first through portions 80a are provided at intervals in the circumferential direction. The plurality of first through portions 80a are arranged at equal intervals around the circumference. In this embodiment, six first through portions 80a are provided. Of the six first through portions 80a, two first through portions 80a are located radially inside each of the pair of straight portions 80f.

[0044] The circuit board 80 has second through portions 80b that penetrate the circuit board 80 in the axial direction. The second through portions 80b are provided on the radially outer side of the circuit board 80. More specifically, the second through portions 80b are provided on the radially outer peripheral edge of the circuit board 80. In this embodiment, the second through portions 80b are circular holes. A plurality of second through portions 80b are provided at intervals in the circumferential direction. In this embodiment, four second through portions 80b are provided.

[0045] The four second through portions 80b are respectively arranged radially outward of the four first through portions 80a other than the two first through portions 80a among the six first through portions 80a that are provided radially inward of the straight portion 80f. The inner diameter of the second through portions 80b is equal to or greater than the longitudinal dimension of the rectangular first through portion 80a. In other words, the dimensions of the second through portions 80b in directions perpendicular to both the axial direction and the radial direction are equal to or greater than the dimensions of the first through portions 80a. In this embodiment, the dimensions of the second through portions 80b in directions perpendicular to both the axial direction and the radial direction are approximately the same as the dimensions of the first through portions 80a.

[0046] The circuit board 80 has third through portions 80e that penetrate the circuit board 80 in the axial direction. One third through portion 80e is provided on each of the pair of straight portions 80f. The pair of third through portions 80e are arranged radially across the central axis J. The pair of third through portions 80e are recesses that are recessed radially inward from the straight portions 80f. The pair of third through portions 80e have a substantially semicircular shape that convex radially inward when viewed in the axial direction. The pair of third through portions 80e are each arranged radially outward of two of the six first through portions 80a that are provided radially inward of the straight portions 80f.

[0047] The circuit board 80 has a fixing hole 80c that penetrates the circuit board 80 in the axial direction. The fixing hole 80c is provided in a radially inner portion of the circuit board 80. The fixing hole 80c is located radially inward of the first through portion 80a, the second through portion 80b, and the third through portion 80e. The fixing hole 80c is a circular hole. A pair of fixing holes 80c is provided radially on either side of the central axis J. The pair of fixing holes 80c is located between the pair of third through portions 80e. As shown in FIG. 1 , a third screw 93 that fixes the circuit board 80 to the board fixing portion 17b is inserted from above through the fixing hole 80c. The peripheral portion of the circuit board 80 around the fixing hole 80c is a fixed portion 80d that is fixed to the board fixing portion 17b by the third screw 93. In other words, the circuit board 80 has the fixed portion 80d that is fixed by the third screw 93, which is a bolt. The head of the third screw 93 contacts the fixed portion 80d from above. A plurality of electronic components 81 are attached to the upper surface of the circuit board 80.

[0048] One ends of a plurality of terminals 83 are connected to the circuit board 80. Although not shown, the other ends of the plurality of terminals 83 are provided on the connector unit 19. When an external power supply (not shown) is connected to the connector unit 19, power from the external power supply is supplied from the terminals 83 to the circuit board 80. Although not shown, the circuit board 80 is electrically connected to the coil 73 by a bus bar. Power supplied to the circuit board 80 from the external power supply (not shown) is supplied to the coil 73 via the bus bar.

[0049] The fixing member 30 is fixed to the upper side of the support member 10. The fixing member 30 is located radially outside the stator 70. The fixing member 30 surrounds the stator 70. In this embodiment, the fixing member 30 is made of metal. The material constituting the fixing member 30 is, for example, iron. The fixing member 30 is made, for example, by pressing a sheet metal member. In other words, in this embodiment, the fixing member 30 is a pressed product. As shown in FIG. 6 , in this embodiment, the fixing member 30 is a cylindrical member that opens on both axial sides. The fixing member 30 has a peripheral wall portion 31 and a first fixing flange portion 32.

[0050] The peripheral wall portion 31 has a cylindrical shape centered on the central axis J. As shown in FIG. 1 , the peripheral wall portion 31 is located radially outward of the stator 70. The peripheral wall portion 31 surrounds the stator 70. The peripheral wall portion 31 is fixed to the outer peripheral surface of the stator 70. In this embodiment, the stator 70 is fixed inside the peripheral wall portion 31 by press-fitting. The peripheral wall portion 31 is located radially between the annular wall portion 14 and the stator 70. The upper end of the peripheral wall portion 31 is located slightly above the upper end of the annular wall portion 14. The upper end of the peripheral wall portion 31 is located below the upper end of the stator core 71. The lower end of the peripheral wall portion 31 is located above the bottom wall portion 11. The lower end of the peripheral wall portion 31 is located below the lower end of the stator core 71 and above the lower end of the insulator 72.

[0051] The first fixed flange portion 32 extends radially outward from the peripheral wall portion 31. More specifically, the first fixed flange portion 32 extends radially outward from the upper end portion of the peripheral wall portion 31. The first fixed flange portion 32 has an annular shape surrounding the central axis J and is plate-shaped with its plate surface facing the axial direction. The first fixed flange portion 32 is located above the annular wall portion 14. The first fixed flange portion 32 is supported from below by the annular wall portion 14.

[0052] 3, the first fixing flange portion 32 is fixed to the upper surface of the annular wall portion 14 by a first screw 91 and a fourth screw 94. As a result, the first fixing flange portion 32 is fixed to the base portion 10a of the support member 10 from above. Furthermore, the fixing member 30 is fixed to the support member 10. In this embodiment, the first fixing flange portion 32 is fixed to each of the six fixed portions 14a by the first screws 91, and is fixed to each of the four fixed portions 14b by the fourth screws 94. The first screws 91 and the fourth screws 94 are bolts having screw heads.

[0053] As shown in FIG. 6 , the first fixing flange portion 32 has a through hole 32a through which the first screw 91 is passed in the axial direction. The through hole 32a is a circular hole that passes through the first fixing flange portion 32 in the axial direction. In this embodiment, six through holes 32a are provided at intervals in the circumferential direction. The first fixing flange portion 32 has a through hole 32b through which the fourth screw 94 is passed in the axial direction. The through hole 32b is a circular hole that passes through the first fixing flange portion 32 in the axial direction. In this embodiment, four through holes 32b are provided at intervals in the circumferential direction. The number and arrangement of the through holes 32a, 32b are not particularly limited.

[0054] The first screw 91 is passed axially through the through hole 32a from above and is tightened into the fastening hole 14d of the fixed portion 14a. The fourth screw 94 is passed axially through the through hole 32b from above and is tightened into the fastening hole 14d of the fixed portion 14b. The first screw 91 and the fourth screw 94 are, for example, tapping screws. Before the first screw 91 or the fourth screw 94 is tightened, the inner circumferential surface of the fastening hole 14d is not threaded. When the first screw 91 or the fourth screw 94 is tightened into the fastening hole 14d, the thread is cut into the inner circumferential surface of the fastening hole 14d.

[0055] The first fixing flange portion 32 has fitting holes 32c into which the fitting protrusions 14c are fitted. In this embodiment, the fitting holes 32c are circular holes that axially penetrate the first fixing flange portion 32. A plurality of fitting holes 32c are provided at intervals in the circumferential direction. Four fitting holes 32c are provided. In this embodiment, the inner diameter of the fitting holes 32c is smaller than the inner diameters of the through holes 32a and 32b. As shown in FIG. 3 , each fitting protrusion 14c is fitted into each fitting hole 32c by passing it axially from below. The clearance between the fitting holes 32c and the fitting protrusions 14c is smaller than the clearance between a second through hole 121d (described later) and the substrate fixing portion 17b. Note that the number of fitting holes 32c and the number of fitting protrusions 14c that are fitted into each other are not particularly limited. The shapes of the fitting hole 32c and the fitting protrusion 14c are not particularly limited.

[0056] 6, the first fixing flange portion 32 has recesses 32d. The recesses 32d are recessed radially inward from the radial outer peripheral edge of the first fixing flange portion 32. The recesses 32d extend in the circumferential direction. A pair of the recesses 32d are provided with the central axis J sandwiched between them in the radial direction.

[0057] The cover 120 is fixed to the upper side of the fixing member 30. As shown in FIG. 1, the cover 120 is located axially between the stator 70 and the circuit board 80. In other words, the circuit board 80 is located above the cover 120. In this embodiment, the cover 120 is made of metal. The material constituting the cover 120 is, for example, iron. The cover 120 is made, for example, by pressing a sheet metal member. In other words, in this embodiment, the cover 120 is a pressed product. The cover 120 has a cover main body portion 121, a protruding wall portion 122, a second fixing flange portion 123, and a protrusion portion 124.

[0058] The cover body 121 is located axially between the stator 70 and the circuit board 80. The cover body 121 is located above the rotor accommodating portion 12. The cover body 121 is plate-shaped with its plate surface facing the axial direction. The lower surface of the cover body 121 is in contact with the upper surface of the second lid portion 12a. The lower surface of the cover body 121 may be disposed opposite the upper surface of the second lid portion 12a with a gap therebetween, without being in contact with the upper surface of the second lid portion 12a. The cover body 121 is fixed to the upper side of the second lid portion 12a by a second screw 92. The second screw 92 is a bolt with a screw head. The cover body 121 extends radially outward beyond the rotor accommodating portion 12.

[0059] 3 and 6, the cover main body 121 has a disk portion 121a and a plurality of protruding plate portions 121b. The disk portion 121a is disk-shaped and centered on the central axis J. As shown in FIG. 1, the disk portion 121a is located above the rotor accommodating portion 12. The lower surface of the disk portion 121a is in contact with the upper surface of the second lid portion 12a.

[0060] As shown in FIGS. 3 and 6 , the cover main body 121 has a first through hole 121c through which the second screw 92 is inserted from above. The first through hole 121c is a circular hole that is centered on the central axis J and penetrates the cover main body 121 in the axial direction. As shown in FIG. 1 , the second screw 92 is inserted through the first through hole 121c from above and tightened into the fastening hole 12e. In this embodiment, the second screw 92 is a tapping screw. Before the second screw 92 is tightened, the inner circumferential surface of the fastening hole 12e is not threaded. The inner circumferential surface of the fastening hole 12e is threaded by tightening the second screw 92 into the fastening hole 12e. At least a portion of the second screw 92 is tightened into the cover portion 12d. In this embodiment, a lower portion of the second screw 92 is tightened into the fastening hole 12e provided in the cover portion 12d. The lower end of the second screw 92 is located lower than the upper end of the rotor 50 .

[0061] As shown in FIGS. 3 and 6, the cover main body 121 has second through holes 121d that penetrate the cover main body 121 in the axial direction. The second through holes 121d are circular holes. The inner diameter of the second through holes 121d is larger than the inner diameter of the first through holes 121c. A pair of second through holes 121d are provided with the first through hole 121c sandwiched between them in the radial direction. Each of the pair of substrate fixing portions 17b passes through the pair of second through holes 121d from below in the axial direction.

[0062] The plurality of protruding plate portions 121b protrude radially outward from the radial outer peripheral edge of the disc portion 121a. The plurality of protruding plate portions 121b are arranged at intervals in the circumferential direction. The plurality of protruding plate portions 121b are arranged at equal intervals around the circumference in the circumferential direction. For example, six protruding plate portions 121b are provided. The plurality of protruding plate portions 121b are located on the upper side of the stator 70.

[0063] The cover main body 121 has a plurality of holes 121e that penetrate the cover main body 121 in the axial direction. The holes 121e are arranged at equal intervals around the circumference. Each hole 121e is a generally rectangular hole that is elongated in the radial direction. Each hole 121e is provided across the disk portion 121a and each protruding plate portion 121b.

[0064] The protruding wall portion 122 protrudes downward from the radial outer peripheral edge of the cover main body portion 121. In this embodiment, the protruding wall portion 122 protrudes downward from each of the radial outer peripheral edges of the protruding plate portions 121b. That is, in this embodiment, a plurality of protruding wall portions 122 are provided at intervals along the circumferential direction. Six protruding wall portions 122 are provided. Each protruding wall portion 122 is plate-shaped with its plate surface facing the radial direction. The protruding wall portion 122 extends in an arc shape centered on the central axis J. The protruding wall portion 122 is located radially outward from a portion of the stator 70 that protrudes above the fixing member 30. The lower end of the protruding wall portion 122 is located radially outward from the upper end of the stator core 71. The protruding wall portion 122 may be in contact with the outer peripheral surface of the upper end of the stator core 71 or may face the outer peripheral surface with a small gap therebetween. 1, the axial dimension of the protruding wall portion 122 is smaller than the axial dimension of the peripheral wall portion 31. In other words, the axial dimension of the peripheral wall portion 31 is larger than the axial dimension of the protruding wall portion 122.

[0065] The second fixed flange portion 123 extends radially outward from the lower end of each protruding wall portion 122. That is, in this embodiment, a plurality of second fixed flange portions 123 are provided at intervals in the circumferential direction. As shown in FIG. 6, six second fixed flange portions 123 are provided. Each second fixed flange portion 123 is plate-shaped with its plate surface facing the axial direction. The second fixed flange portion 123 extends in an arc shape centered on the central axis J. The second fixed flange portion 123 has a through hole 123a that passes through the second fixed flange portion 123 in the axial direction. The through hole 123a is a circular hole.

[0066] The second fixing flange portion 123 is fixed to the first fixing flange portion 32 from above. As shown in Fig. 1, in this embodiment, the second fixing flange portion 123 is fixed to the first fixing flange portion 32 by fastening a first screw 91 that is passed from above through the through hole 123a and the through hole 32a of the first fixing flange portion 32 into the fastening hole 14d of the fixed portion 14a. In this way, in this embodiment, the first fixing flange portion 32 and the second fixing flange portion 123 are fastened together to the base portion 10a by the first screw 91 and fixed to each other.

[0067] The protrusions 124 protrude upward from the cover main body 121. In this embodiment, the protrusions 124 are made of metal and have a plate shape. As shown in FIG. 6, in this embodiment, a plurality of the protrusions 124 are provided at intervals in the circumferential direction. The plurality of protrusions 124 are arranged at equal intervals around the circumference. Each protrusion 124 protrudes upward from a portion of the inner edge of each hole 121e that is located radially outward. In this embodiment, six protrusions 124 are provided. As shown in FIG. 4, each protrusion 124 is axially inserted through a corresponding first through portion 80a. Each protrusion 124 protrudes upward beyond the circuit board 80 via a corresponding first through portion 80a. As shown in FIG. 7, the protrusion 124 includes a support portion 124a, a connection portion 124b, and a contact portion 124c.

[0068] The support portion 124a is a portion connected to the cover main body portion 121. The support portion 124a protrudes upward from a portion of the inner edge of the hole portion 121e that is located radially outward. The support portion 124a is a substantially rectangular plate with its plate surface facing the radial direction. In the following description, the direction along the plate surface of the support portion 124a is referred to as the "width direction W." In this embodiment, the dimension of the width direction W of the protrusion portion 124 corresponds to the width of the protrusion portion 124. In FIG. 7, the width direction W is indicated by an arrow W. The width direction W is a direction perpendicular to both the axial direction and the radial direction.

[0069] The dimension of the support portion 124a in the width direction W is larger than the dimension of the first through portion 80a in the width direction W. The support portion 124a protrudes further on both sides in the width direction W than the first through portion 80a. Both ends of the support portion 124a in the width direction W are in contact with the peripheral edge of the first through portion 80a on the lower surface of the circuit board 80. As a result, the support portion 124a is in contact with the circuit board 80 from below.

[0070] The connecting portion 124b is connected to the upper side of the support portion 124a. The connecting portion 124b connects the support portion 124a and the contact portion 124c. The dimension in the width direction W of the connecting portion 124b is smaller than the dimension in the width direction W of the support portion 124a and the dimension in the width direction W of the contact portion 124c. In other words, the width of the connecting portion 124b is smaller than the width of the support portion 124a and the width of the contact portion 124c. The dimension in the width direction W of the connecting portion 124b is smaller than the dimension in the width direction W of the first through portion 80a. The connecting portion 124b is passed through the first through portion 80a in the axial direction. An upper portion of the connecting portion 124b is a bent portion 124d bent radially outward. In other words, the connecting portion 124b has the bent portion 124d bent in a direction intersecting the axial direction. The bent portion 124d is located above the circuit board 80.

[0071] The contact portion 124c is connected to the radially outer side of the bent portion 124d. The contact portion 124c extends radially outward from the bent portion 124d. The contact portion 124c is plate-shaped with its plate surface facing the axial direction. The radially outer end of the contact portion 124c is semicircular and convex radially outward when viewed in the axial direction. The dimension in the width direction W of the contact portion 124c is larger than the dimension in the width direction W of the connecting portion 124b and smaller than the dimension in the width direction W of the support portion 124a and the dimension in the width direction W of the first penetrating portion 80a. The contact portion 124c contacts the circuit board 80 from above. In this embodiment, for example, the radially inner portion of the contact portion 124c contacts the circuit board 80 from above. For example, the radially outer portion of the contact portion 124c is slightly bent downward more than the radially inner portion of the contact portion 124c.

[0072] The protrusion 124 has a crimped portion 124e crimped in a direction intersecting the axial direction. In this embodiment, the crimped portion 124e has a contact portion 124c and a bent portion 124d. That is, the contact portion 124c and the bent portion 124d each constitute a part of the crimped portion 124e. In this embodiment, the crimped portion 124e is composed of the contact portion 124c and the bent portion 124d. The width of the crimped portion 124e, i.e., the dimension in the width direction W, is smaller than the width of the support portion 124a, i.e., the dimension in the width direction W. In this embodiment, the crimped portion 124e is a portion of the protrusion 124 crimped radially outward. Before being crimped, the protrusion 124 extends straight upward from the cover main body 121, as shown by the two-dot chain line in FIG. 7. After the protrusion 124 in this state is passed through the first through-hole 80a, the upper portion of the protrusion 124 is crimped radially outward to form a crimped portion 124e.

[0073] 4, the multiple protrusions 124 include four first protrusions 124h and two second protrusions 124i. The first protrusions 124h are protrusions 124 in which a portion of the contact portion 124c overlaps with the second through portion 80b when viewed in the axial direction. In this embodiment, a radially outer portion of the contact portion 124c of the first protrusions 124h overlaps with the second through portion 80b when viewed in the axial direction. The radially outer portion of the contact portion 124c of the first protrusions 124h is located above the second through portion 80b.

[0074] As shown in FIG. 7, the lower end of the first pressing portion 24 contacts the upper surface of the contact portion 124c of the first protrusion 124h. The portion of the first pressing portion 24 that contacts the contact portion 124c overlaps with the second through-hole 80b when viewed in the axial direction. In this embodiment, the radially outer end of the first pressing portion 24 is located radially outward of the second through-hole 80b. The crimped portion 124e of the first protrusion 124h is pressed from above by the first pressing portion 24 and is slightly elastically deformed downward. In other words, when not pressed by the first pressing portion 24, the first protrusion 124h is slightly displaced upward compared to the state shown in each figure.

[0075] 4, the second protrusion 124i is a protrusion 124 in which a portion of the contact portion 124c is located outside the circuit board 80 as viewed in the axial direction. In this embodiment, the radially outer portion of the contact portion 124c of the second protrusion 124i protrudes radially outward beyond the outer edge of the circuit board 80 as viewed in the axial direction. The contact portions 124c of the two second protrusions 124i overlap with the two straight line portions 80f as viewed in the axial direction. The radially outer portion of the contact portion 124c of each second protrusion 124i protrudes radially outward beyond the corresponding straight line portion 80f.

[0076] As shown in FIG. 1, the lower end of the second pressing portion 25 contacts the upper surface of the contact portion 124c of the second protrusion 124i. The portion of the second pressing portion 25 that contacts the contact portion 124c is located outside the circuit board 80 when viewed in the axial direction. In this embodiment, the entire second pressing portion 25 is located outside the circuit board 80 when viewed in the axial direction. The crimped portion 124e of the second protrusion 124i is pressed from above by the second pressing portion 25 and is slightly elastically deformed downward. In other words, when not pressed by the second pressing portion 25, the second protrusion 124i is displaced slightly upward compared to the state shown in each figure.

[0077] In this embodiment, the circuit board 80 is fixed by six protrusions 124 and two third screws 93. A fixed portion 80d of the circuit board 80 that is fixed by the two third screws 93 is located radially inward of a portion of the circuit board 80 that is fixed by the protrusions 124. That is, in this embodiment, the fixed portion 80d of the circuit board 80 is fixed by the third screws 93, which are bolts, radially inward of the contact portions 124c of the protrusions 124. In this embodiment, the portion of the circuit board 80 that is fixed by the protrusions 124 is the radially outer peripheral edge of the circuit board 80.

[0078] In this embodiment, a worker or the like who fixes the circuit board 80 approaches the cover 120 from above and passes each of the uncrimped protrusions 124 through each of the first through-holes 80a of the circuit board 80. At this time, the circuit board 80 is supported from below by the support portions 124a of the protrusions 124 and the board fixing portion 17b. Next, the worker or the like passes the third screws 93 through the fixing holes 80c from above and tightens the third screws 93 into the fastening holes 17c of the board fixing portion 17b. This fixes the fixed portions 80d of the circuit board 80 to the board fixing portion 17b. Next, the worker or the like crimps the upper portions of the uncrimped protrusions 124 radially outward until the contact portions 124c contact the circuit board 80. At this time, the upper portion of the connecting portion 124b of the protruding portion 124 is bent radially outward to form a bent portion 124d, and a crimped portion 124e is formed. In this way, the circuit board 80 is fixed.

[0079] In this specification, the term "workers, etc." includes workers who perform each task and assembly equipment, etc. Each task may be performed by a worker alone, by an assembly equipment alone, or by a worker and an assembly equipment together.

[0080] According to this embodiment, the rotating electric machine 100a includes a cover 120 located axially between the stator 70 and the circuit board 80. The cover 120 includes a cover main body 121 located axially between the stator 70 and the circuit board 80, and a protrusion 124 protruding upward from the cover main body 121. The protrusion 124 includes a support portion 124a connected to the cover main body 121 and a crimped portion 124e that is narrower than the support portion 124a and is crimped in a direction intersecting the axial direction. The support portion 124a contacts the circuit board 80 from below. The crimped portion 124e has a contact portion 124c that contacts the circuit board 80 from above. Therefore, the support portion 124a and the contact portion 124c can press the circuit board 80 from both axial sides, thereby fixing the circuit board 80 to the cover 120. As a result, for example, instead of providing a board fixing portion for fixing the circuit board 80 on the base 10a or the like, the protrusion 124 can be provided to fix the circuit board 80. Therefore, by providing the protrusion 124, the number of board fixing portions provided on the housing 110 can be reduced, and an increase in the size of the housing 110 can be suppressed. As a result, an increase in the size of the rotating electric machine 100a can be suppressed. As a result, an increase in the size of the pump 100 can be suppressed.

[0081] Specifically, for example, if a board fixing portion extending upward from the base 10a is provided and the radially outer peripheral edge of the circuit board 80 is screwed to the board fixing portion, the board fixing portion needs to be provided radially outward of the annular wall portion 14 to which the fixing member 30 and the cover 120 are fixed in order to avoid interference with various components of the rotating electric machine 100a. As a result, the base 10a becomes larger in the radial direction, and the rotating electric machine 100a also becomes larger in the radial direction. In contrast, according to this embodiment, by fixing the radially outer peripheral edge of the circuit board 80 using the protrusions 124, it is not necessary to provide such a board fixing portion on the base 10a. This prevents the base 10a from becoming larger in the radial direction. This prevents the rotating electric machine 100a from becoming larger in the radial direction, and allows the circuit board 80 to be stably fixed by the protrusions 124. Furthermore, there is no need to increase the radial size of the circuit board 80 in order to fix it to the board fixing portion. This prevents the circuit board 80 from becoming unnecessarily larger in the radial direction. Furthermore, compared to a conventional rotating electric machine in which the above-described substrate fixing portion is provided on the base portion 10a, the outer diameter of the rotor 50 and the outer diameter of the stator 70 can be increased without increasing the radial size of the base portion 10a. Therefore, the output of the rotating electric machine 100a can be improved without increasing the radial size of the rotating electric machine 100a.

[0082] Furthermore, when a board fixing portion is provided on the base 10a as described above, the board fixing portion needs to extend axially from the base 10a to the circuit board 80, which tends to increase the axial dimension of the board fixing portion. This reduces the strength of the board fixing portion, potentially resulting in unstable fixation of the circuit board 80. Furthermore, the board fixing portion is prone to vibration, potentially increasing the vibrations generated in the circuit board 80. In contrast, according to the present embodiment, instead of the board fixing portion described above, a protrusion 124 capable of fixing the circuit board 80 is provided on the cover 120, which is positioned axially between the stator 70 and the circuit board 80. This allows the axial dimension of the protrusion 124 to be relatively small. This effectively prevents the strength of the protrusion 124 from being reduced, thereby preventing unstable fixation of the circuit board 80. Furthermore, the protrusion 124 is less likely to vibrate, making it easier to effectively suppress vibrations generated in the circuit board 80 by the protrusion 124.

[0083] Furthermore, because the protrusion 124 has the support portion 124a, when the circuit board 80 is fixed, the circuit board 80 can be positioned in the axial direction relative to the protrusion 124 before being crimped. Therefore, the portion of the protrusion 124 to be crimped can be made to protrude upwardly above the circuit board 80 in an appropriate manner. Furthermore, the protrusion 124 can be crimped while the circuit board 80 is supported by the support portion 124a. This allows the protrusion 124 to be crimped in an appropriate manner. Furthermore, because the width of the crimped portion 124e is smaller than the width of the support portion 124a, the crimped portion 124e is more easily deformed than the support portion 124a. Therefore, it is easy to crimp a portion of the protrusion 124 to form the crimped portion 124e.

[0084] Furthermore, according to this embodiment, the circuit board 80 has a first through portion 80a that penetrates the circuit board 80 in the axial direction. The protrusion 124 is passed through the first through portion 80a in the axial direction. The support portion 124a is in contact with the peripheral edge of the first through portion 80a on the lower surface of the circuit board 80. This allows the support portion 124a to easily and suitably contact the lower surface of the circuit board 80. This allows the support portion 124a to suitably support the circuit board 80 from below.

[0085] Furthermore, according to this embodiment, the protrusion 124 has a connecting portion 124b that connects the support portion 124a and the contact portion 124c. The width of the connecting portion 124b is smaller than the width of the support portion 124a and the width of the contact portion 124c. The connecting portion 124b has a bent portion 124d that bends in a direction intersecting the axial direction and forms part of the crimping portion 124e. Therefore, the connecting portion 124b can be deformed more easily than the support portion 124a and the contact portion 124c, and the protrusion 124 can be easily crimped by bending the connecting portion 124b. This makes it easier to crimp the protrusion 124.

[0086] Furthermore, according to the present embodiment, the bent portion 124d is located above the circuit board 80. Therefore, the contact portion 124c connected to the bent portion 124d can be preferably located above the circuit board 80. Therefore, the contact portion 124c can be easily brought into contact with the circuit board 80 in a suitable manner.

[0087] Furthermore, according to this embodiment, the crimped portion 124e is crimped radially outward. Therefore, it is easier to crimp the protrusion 124 to form the crimped portion 124e than, for example, when the crimped portion 124e is crimped radially inward. Furthermore, the portion of the circuit board 80 that comes into contact with the contact portion 124c of the crimped portion 124e is more likely to be located radially outward. This allows the protrusion 124 to more stably fix the circuit board 80.

[0088] Furthermore, according to this embodiment, the housing 110 has a first lid portion 21 that covers the circuit board 80 from above. The first lid portion 21 has a first pressing portion 24 and a second pressing portion 25 as pressing portions that contact the contact portion 124c from above. Therefore, the first pressing portion 24 and the second pressing portion 25 can prevent the contact portion 124c from floating upward from the circuit board 80. This allows the contact portion 124c to be in suitable contact with the circuit board 80. Therefore, the circuit board 80 can be more suitably fixed by the protrusion 124.

[0089] Furthermore, according to this embodiment, the circuit board 80 has a second through-hole 80b that penetrates the circuit board 80 in the axial direction. The protrusion 124 includes a first protrusion 124h in which a portion of the contact portion 124c overlaps with the second through-hole 80b in the axial direction. The pressing portion that contacts the contact portion 124c includes a first pressing portion 24 that contacts the contact portion 124c of the first protrusion 124h. The portion of the first pressing portion 24 that contacts the contact portion 124c overlaps with the second through-hole 80b in the axial direction. Therefore, even if the contact portion 124c of the first protrusion 124h is pressed downward and deformed by the first pressing portion 24, the deformed portion of the contact portion 124c can escape into the second through-hole 80b. This prevents the portion of the contact portion 124c that is pressed by the first pressing portion 24 from being pressed strongly against the circuit board 80. This prevents the circuit board 80 from being damaged.

[0090] Furthermore, according to this embodiment, the protrusion 124 includes a second protrusion 124i in which a portion of the contact portion 124c is located outside the circuit board 80 as viewed in the axial direction. The pressing portion that contacts the contact portion 124c includes a second pressing portion 25 that contacts the contact portion 124c of the second protrusion 124i. The portion of the second pressing portion 25 that contacts the contact portion 124c is located outside the circuit board 80 as viewed in the axial direction. Therefore, even if the contact portion 124c of the second protrusion 124i is pressed downward and deformed by the second pressing portion 25, the deformed portion of the contact portion 124c can be released downward outside the circuit board 80. This prevents the portion of the contact portion 124c that is pressed by the second pressing portion 25 from being pressed strongly against the circuit board 80. This prevents the circuit board 80 from being damaged. In this embodiment, by providing the linear portion 80f on the outer edge of the circuit board 80, the radially outer portion of the second protrusion 124i can be easily positioned outside the circuit board 80 as viewed in the axial direction. Furthermore, the linear portion 80f is provided with the third through portion 80e at a position overlapping with the second protrusion 124i as viewed in the axial direction, so that a portion of the second protrusion 124i can also be released by the third through portion 80e. This further prevents the portion of the contact portion 124c that is pressed by the second pressing portion 25 from being pressed strongly against the circuit board 80.

[0091] Furthermore, according to this embodiment, the protrusions 124 are provided at intervals in the circumferential direction, so that the circuit board 80 can be fixed more suitably by the protrusions 124.

[0092] Furthermore, according to this embodiment, the circuit board 80 has a fixed portion 80d that is fixed by a third screw 93, which is a bolt, on a radially inner side of the contact portion 124c. Therefore, the central portion of the circuit board 80, where the amplitude of vibration is likely to be large when it vibrates, can be fixed by the third screw 93. This makes it possible to suitably suppress vibration of the circuit board 80.

[0093] Furthermore, according to this embodiment, the protrusion 124 is made of metal and has a plate shape. Therefore, it is easy to form the crimped portion 124e by crimping the protrusion 124. Furthermore, when the contact portion 124c of the crimped portion 124e is pressed by the first pressing portion 24 or the second pressing portion 25, the crimped portion 124e can be elastically deformed downward. This allows the protrusion 124 to be more suitably pressed from above by utilizing the elastic force generated in the crimped portion 124e. Therefore, the circuit board 80 can be more stably fixed by the protrusion 124.

[0094] Furthermore, according to this embodiment, the cover 120 is a pressed product, which reduces the manufacturing cost of the cover 120. Furthermore, the metal plate-shaped protrusions 124 can be easily produced.

[0095] Furthermore, according to this embodiment, the pump 100 includes a support member 10 having a base 10a that covers the stator 70 from below, and a rotor housing 12 made of a non-magnetic material that is located radially inside the stator 70 and houses the rotor 50 therein. The rotor housing 12 has a second lid 12a that covers the rotor 50 from above, and a cylindrical portion 12b that is located radially between the rotor 50 and the stator 70 and opens downward. Therefore, while the pump unit 60 is connected to the underside of the rotor 50, the rotor 50 and the stator 70 can be separated and sealed by the base 10a and the rotor housing 12, preventing the fluid pumped by the pump unit 60, i.e., water in this embodiment, from coming into contact with the stator 70.

[0096] The rotor accommodating portion 12 needs to be made of a non-magnetic material such as resin to prevent interference with the magnetic flux flowing between the rotor 50 and the stator 70. Therefore, the strength of the rotor accommodating portion 12 tends to be relatively low compared to rotor accommodating portions 12 made of iron or other materials. Furthermore, to obtain a relatively large rotational torque of the rotor 50, the radial gap between the rotor 50 and the stator 70 needs to be relatively small. Therefore, the radial thickness of the wall constituting the cylindrical portion 12b of the rotor accommodating portion 12 needs to be relatively small. This further reduces the strength of the rotor accommodating portion 12. If the stator 70 were fixed to such a rotor accommodating portion 12 from the radially outer side, the rotor accommodating portion 12 could be damaged. Therefore, in a conventional structure, the entire stator 70 is covered with a resin mold, which supports the stator 70 while separating and sealing the rotor 50 and the stator 70. However, this structure increases the number of steps and time required to form the resin mold, which increases the number of steps and time required to manufacture the pump 100.

[0097] In contrast, according to this embodiment, the pump 100 includes a fixing member 30 positioned radially outward of the stator 70 and surrounding the stator 70. The stator 70 is fixed to the fixing member 30, which is fixed to the support member 10. Therefore, the stator 70 can be suitably fixed to the support member 10 via the fixing member 30, without being directly fixed to the rotor accommodating portion 12. This prevents the stator 70 from applying force to the rotor accommodating portion 12. Therefore, damage to the rotor accommodating portion 12 can be prevented even if the entire stator 70 is not covered with a resin mold. This eliminates the need to cover the entire stator 70 with a resin mold, thereby preventing an increase in the number of steps and time required to manufacture the pump 100. As described above, according to this embodiment, the number of steps and time required to manufacture the pump 100 can be reduced while ensuring sealing between the rotor 50 and the stator 70. This reduces the manufacturing cost of the pump 100. Furthermore, the fixing member 30 facilitates accurate positioning of the stator 70, improving the assembly of the pump 100. Furthermore, compared to covering the stator 70 with a resin mold, the manufacturing process does not require advanced techniques. Furthermore, because the rotor accommodating portion 12 is prevented from receiving force from the stator 70, the cylindrical portion 12b of the rotor accommodating portion 12 can be suitably thinned, and the radial gap between the rotor 50 and the stator 70 can be suitably reduced. Therefore, the rotational torque of the rotor 50 can be suitably increased.

[0098] Furthermore, according to this embodiment, the pump 100 includes a cover 120 having a cover main body 121 located above the rotor accommodating portion 12. The cover 120 is fixed to the upper side of the fixing member 30. By providing the cover 120 having the cover main body 121 as the portion located above the rotor accommodating portion 12 separately from the fixing member 30 and fixing it to the upper side of the fixing member 30 in this manner, it is not necessary to provide the portion located above the rotor accommodating portion 12 on the fixing member 30. Therefore, it is easier to arrange the fixing member 30 so that it extends further downward than if the portion located above the rotor accommodating portion 12 were provided on the fixing member 30. As a result, even if, for example, the axial dimension of the stator 70 is relatively small and a large portion of the stator 70 in the axial direction is located inside the annular wall portion 14 provided on the support member 10, the fixing member 30 can be suitably arranged within the annular wall portion 14 and the stator 70 can be suitably fixed to the fixing member 30. Therefore, the stator 70 can be made smaller in size in the axial direction, thereby making the pump 100 smaller in size in the axial direction, while the stator 70 can be suitably fixed by the fixing member 30.

[0099] Note that, for example, if the annular wall portion 14 is made smaller in the axial direction and a large portion of the stator core 71 is configured to protrude above the annular wall portion 14, it is possible to fix the stator core 71 by providing a portion of the cover 120, such as the peripheral wall portion 31, to which the stator core 71 is fixed. However, in this case, the axial dimension of the annular wall portion 14 is reduced, and the axial dimension of the fixed portion 14a, into which the first screw 91 for fixing the cover 120 is fastened, is also reduced. This may reduce the fixing strength of the cover 120 and the fixing strength of the stator 70. In particular, if the first screw 91 is a tapping screw as in this embodiment, in order to stably fix the cover 120 to the resin annular wall portion 14 with the first screw 91, the axial dimension into which the first screw 91 is fastened needs to be relatively large. Therefore, if the axial dimension of the annular wall portion 14 is small, it becomes more difficult to stably fix the cover 120 to the annular wall portion 14.

[0100] In contrast to this, according to the present embodiment, by providing the cover 120 separately from the fixing member 30, it is possible to suitably fix the stator 70 to the fixing member 30 while increasing the size of the annular wall portion 14 to a certain extent in the axial direction. Therefore, the size of the first screw 91 fastened to the annular wall portion 14 can be increased, and the fixing member 30 and the cover 120 can be stably fixed to the annular wall portion 14. This allows the stator 70 to be stably fixed.

[0101] Furthermore, according to this embodiment, the rotor accommodating portion 12 is made of resin. Therefore, the rotor accommodating portion 12 can be easily molded while being made of a non-magnetic material. On the other hand, the strength of the rotor accommodating portion 12 is likely to be lower. However, as described above, in this embodiment, by providing the fixing member 30, damage to the rotor accommodating portion 12 can be suppressed. In this way, when the rotor accommodating portion 12 is made of resin, the effect of suppressing damage to the rotor accommodating portion 12 can be more effectively obtained. Furthermore, according to this embodiment, the fixing member 30 is made of metal. Therefore, the stator 70 can be suitably and firmly fixed by the fixing member 30.

[0102] Furthermore, according to this embodiment, the fixing member 30 has a peripheral wall portion 31 fixed to the outer circumferential surface of the stator 70, and a first fixing flange portion 32 extending radially outward from the peripheral wall portion 31. The first fixing flange portion 32 is fixed to the base portion 10a from above. Therefore, the fixing member 30 can be suitably fixed to the support member 10 via the first fixing flange portion 32, while the stator 70 is firmly fixed to the peripheral wall portion 31. Furthermore, the first fixing flange portion 32 can suitably position the fixing member 30 relative to the support member 10 in the axial direction, and the stator 70 can be suitably positioned relative to the support member 10 in the axial direction.

[0103] Furthermore, according to this embodiment, the first fixing flange portion 32 extends radially outward from the upper end portion of the peripheral wall portion 31. The cover 120 has a protruding wall portion 122 that protrudes downward from the radially outer peripheral edge portion of the cover main body portion 121, and a second fixing flange portion 123 that extends radially outward from the lower end portion of the protruding wall portion 122. The second fixing flange portion 123 is fixed to the first fixing flange portion 32 from above. Therefore, the cover 120 can be suitably fixed to the upper side of the fixing member 30.

[0104] Furthermore, according to this embodiment, the first fixing flange portion 32 and the second fixing flange portion 123 are fastened together to the base portion 10a by the first screws 91 and fixed to each other. Therefore, the first fixing flange portion 32 and the second fixing flange portion 123 can be fixed together to the base portion 10a by the first screws 91. This makes it easier to fix the fixing member 30 and the cover 120.

[0105] Furthermore, according to this embodiment, the base 10a has a bottom wall portion 11 located below the stator 70, and an annular wall portion 14 that protrudes upward from the bottom wall portion 11 and surrounds the stator 70 from the radially outer side. The first fixing flange portion 32 is fixed to the upper surface of the annular wall portion 14. The peripheral wall portion 31 is located radially between the annular wall portion 14 and the stator 70. Therefore, the stator 70 disposed within the annular wall portion 14 can be suitably fixed to the peripheral wall portion 31. As a result, even if a large portion of the stator 70 in the axial direction is disposed within the annular wall portion 14, the stator 70 can be suitably fixed to the peripheral wall portion 31 while the fixing member 30 is fixed to the annular wall portion 14.

[0106] Furthermore, according to this embodiment, the stator 70 protrudes upward beyond the fixing member 30. The protruding wall portion 122 is located radially outward of the portion of the stator 70 that protrudes upward beyond the fixing member 30. The axial dimension of the peripheral wall portion 31 is greater than the axial dimension of the protruding wall portion 122. This allows the axial dimension of the portion of the stator 70 that is fixed to the peripheral wall portion 31 to be increased. This allows the stator 70 to be more suitably fixed to the fixing member 30.

[0107] Furthermore, according to this embodiment, a plurality of protruding wall portions 122 are provided at intervals along the circumferential direction. A second fixing flange portion 123 is provided for each protruding wall portion 122. Therefore, the cover 120 can be suitably fixed to the first fixing flange portion 32 via the plurality of second fixing flange portions 123. Furthermore, coil lead wires and the like extending from the stator 70 can be drawn out from between the protruding wall portions 122 adjacent to each other in the circumferential direction. This allows the stator 70 to be easily electrically connected to the circuit board 80.

[0108] Furthermore, according to this embodiment, the cover main body 121 is fixed to the second lid portion 12a by the second screw 92. Therefore, the cover main body 121 can reinforce the rotor accommodating portion 12. This further reduces damage to the rotor accommodating portion 12.

[0109] Furthermore, according to this embodiment, the support member 10 has a fitting protrusion 14c that protrudes in the axial direction. The first fixing flange portion 32 has a fitting hole portion 32c into which the fitting protrusion 14c is fitted. Therefore, the fixing member 30 can also be suitably positioned relative to the support member 10 in the radial and circumferential directions via the first fixing flange portion 32. This allows the stator 70 to be suitably positioned relative to the support member 10 in the radial and circumferential directions.

[0110] Furthermore, when the fixing member 30 is made of a sheet metal member as in this embodiment, one way to provide the fitting protrusion on the first fixing flange portion 32 is to extrude a portion of the plate-like first fixing flange portion 32 to form the fitting protrusion. However, in this case, it is difficult to increase the protruding height of the fitting protrusion. Therefore, by providing the fitting protrusion 14c on the support member 10 as in this embodiment, it is easy to increase the protruding height of the fitting protrusion 14c, and it is easy to suitably fit the fitting protrusion 14c into the fitting hole portion 32c.

[0111] Furthermore, according to this embodiment, the stator 70 is disposed in a state where it is not in contact with the outer peripheral surface of the cylindrical portion 12b. This more effectively prevents a force from being directly applied from the stator 70 to the rotor accommodating portion 12. This more effectively prevents the rotor accommodating portion 12 from being damaged.

[0112] Furthermore, according to this embodiment, pump 100 is a water pump that pumps water. Water has a relatively low viscosity and is more difficult to seal than oil and the like. Therefore, in order to suitably prevent water from contacting stator 70, conventional water pumps have adopted a structure in which stator 70 is entirely covered with a resin mold to seal it. As described above, the structure of pump 100 according to this embodiment has the advantage of making pump 100 easier to manufacture than such a structure in which stator 70 is entirely covered with a resin mold. In other words, the conventional structure in which stator 70 is entirely covered with a resin mold is a structure that is easily adopted in water pumps, and the structure of this embodiment is a more useful structure when applied to a water pump.

[0113] Furthermore, for example, in the case where the fixed shaft 40 is fixed to the rotor accommodating portion 12 as in this embodiment, if a screw is directly fastened to the fixed shaft 40, fluid may leak from inside the rotor accommodating portion 12 to the stator 70 through a gap between the fixed shaft 40 and the screw. However, if the fixed shaft 40 is not directly fastened with a screw, the fixing of the fixed shaft 40 may become unstable.

[0114] In contrast, according to this embodiment, the second lid portion 12a of the rotor accommodating portion 12 has a holding portion 12c that holds the upper end of the fixed shaft 40. A hole 43 that is recessed downward is provided at the upper end of the fixed shaft 40. The holding portion 12c has a cover portion 12d that is located at least partially within the hole 43. A second screw 92 is fastened to the second lid portion 12a from above. At least a portion of the second screw 92 is fastened to the cover portion 12d. Therefore, the cover portion 12d is expanded by the second screw 92 and pressed against the inner circumferential surface of the hole 43. This improves the strength of the cover portion 12d, and the cover portion 12d is firmly fixed to the fixed shaft 40. Therefore, the fixed shaft 40 is firmly fixed to the second lid portion 12a. This prevents problems such as tilting of the fixed shaft 40, and allows the fixed shaft 40 to suitably support the rotor 50.

[0115] On the other hand, the second screw 92 is not directly screwed into the fixed shaft 40, and a cover portion 12d is provided between the second screw 92 and the fixed shaft 40. Therefore, the gap between the second screw 92 and the fixed shaft 40 is sealed by the cover portion 12d, and it is possible to prevent fluid that has flowed into the rotor accommodating portion 12 from leaking from the meshing portion of the second screw 92 to the outside of the rotor accommodating portion 12. As described above, according to this embodiment, it is possible to improve the fixing strength of the fixed shaft 40 while preventing fluid from leaking to the stator 70. Furthermore, because fluid does not come into contact with the second screw 92, it is possible to prevent problems such as corrosion of the second screw 92 from occurring.

[0116] Furthermore, according to this embodiment, the cover main body 121 of the cover 120 is fixed to the upper side of the second lid portion 12a by the second screw 92 fastened to the cover portion 12d. Therefore, the fixed shaft 40 is firmly fixed to the rotor accommodating portion 12 by the second screw 92, and the rotor accommodating portion 12 can be reinforced by the cover main body 121 as described above.

[0117] Furthermore, according to this embodiment, the rotor accommodating portion 12 is made of resin, and the second screw 92 is a tapping screw. Therefore, the second screw 92 can be directly and suitably fastened to the second lid portion 12a of the rotor accommodating portion 12 made of resin. This eliminates the need to embed a metal nut member in the rotor accommodating portion 12, for example, and prevents the number of parts of the pump 100 from increasing.

[0118] Second Embodiment In the following description, the same components as those in the above-described embodiment may be denoted by the same reference numerals as appropriate and the description thereof may be omitted. As shown in Fig. 8, the rotating electric machine 200a in the pump 200 of this embodiment includes a covering portion 226 that covers at least a portion of the contact portion 124c. Therefore, at least a portion of the outer surface of the contact portion 124c can be coated with the covering portion 226. This makes it possible to prevent the contact portion 124c from directly contacting the circuit board 80 by the covering portion 226. Therefore, when the contact portion 124c is made of metal, for example, it is possible to prevent the circuit board 80 from being damaged by corners of the contact portion 124c.

[0119] In this embodiment, the covering portion 226 covers the entire outer surface of the contact portion 124c and a portion of the outer surface of the bent portion 124d. The covering portion 226 is a heat-shrinkable tube. Therefore, the covering portion 226 can be easily provided on the protrusion 124 by covering the protrusion 124 with the heat-shrinkable tube before shrinking and then heating the tube to heat-shrink it. Furthermore, if the width of the connecting portion 124b is smaller than the width of the contact portion 124c, the covering portion 226 can be created by heat-shrinking the heat-shrinkable tube while covering at least a portion of the connecting portion 124b. This allows the covering portion 226 to be hooked onto the step between the connecting portion 124b and the contact portion 124c. This effectively prevents the covering portion 226 from coming off the protrusion 124.

[0120] Other configurations of the respective parts in the rotating electric machine 200a are similar to other configurations of the respective parts in the rotating electric machine 100a of the first embodiment. Other configurations of the respective parts in the pump 200 are similar to other configurations of the respective parts in the pump 100 of the first embodiment.

[0121] 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. The cover provided with the protrusions may be a fixed member to which the stator is fixed. In this case, the cover may have a peripheral wall portion fixed to the outer circumferential surface of the stator. The cover may be a member made of any material. There are no particular limitations on the material that constitutes the cover. The cover may be fixed to the fixed member by a method other than screw fixing. The cover may be fixed to the fixed member by welding or the like.

[0122] The protrusion may have any configuration as long as it has a support portion and a crimped portion. The protrusion does not have to be plate-shaped. The support portion may be columnar, such as cylindrical, and the crimped portion may be plate-shaped. The width of the connection portion and the width of the contact portion of the protrusion may be the same. The protrusion does not have to be passed through a first through-portion provided in the circuit board. In this case, for example, the protrusion may pass radially outside the circuit board and protrude to one axial side (upper side) of the circuit board. The crimped portion may be crimped in any direction. The number of protrusions is not particularly limited. The position at which the protrusion fixes the circuit board is not particularly limited. The circuit board may be fixed only by the protrusion, and not by bolts. The material constituting the protrusion is not particularly limited.

[0123] The material constituting the support member is not particularly limited as long as it is non-magnetic. The second cover portion of the rotor accommodating portion does not need to be screwed. The fixing member may be fixed to the support member by a method other than screw fixing. The fixing member may be fixed to the support member by thermal caulking a portion of the support member or ultrasonically welding a portion of the support member. The material constituting the fixing member is not particularly limited. Each screw in the above-described embodiment may be of any type. The stator may contact the rotor accommodating portion. A fixing shaft may not be provided.

[0124] The application of the rotating electric machine to which the present invention is applied is not particularly limited. The rotating electric machine may be mounted on any type of equipment. The rotating electric machine may be mounted on an actuator equipped with a speed reduction mechanism. The rotating electric machine may be a generator. The application of the pump to which the present invention is applied is not particularly limited. The pump may be mounted on any type of equipment. The pump may be mounted on a vehicle, for example. The pump may be a pump that pumps any type of fluid. The pump may be an oil pump that pumps oil. Note that the configurations described above in this specification can be combined as appropriate within a range that does not contradict each other. [Explanation of symbols]

[0125] 10...support member, 10a...base portion, 12...rotor accommodating portion, 12a...second lid portion, 12b...cylindrical portion, 124...projection portion, 80d...fixed portion, 21...first lid portion, 24...first pressing portion (pressing portion), 25...second pressing portion (pressing portion), 30...fixing member, 50...rotor, 60...pump portion, 70...stator, 80...circuit board, 80a...first through portion, 8 0b...second penetration portion, 100, 200...pump, 100a, 200a...rotating electric machine, 110...housing, 120...cover, 121...cover main body portion, 124a...support portion, 124b...connection portion, 124c...contact portion, 124d...bent portion, 124e...crimped portion, 124h...first protrusion portion, 124i...second protrusion portion, 226...covering portion, J...center axis

Claims

1. a rotor rotatable about a central axis; a stator positioned radially outside the rotor and surrounding the rotor; a circuit board located on one axial side of the stator; a cover positioned axially between the stator and the circuit board; a support member having a base portion that covers the stator from the other axial side; a fixing member fixed to the support member; Equipped with The cover is a cover body portion located axially between the stator and the circuit board; a protrusion protruding from the cover body toward one axial direction; and The protrusion is a support portion connected to the cover main body portion; a crimped portion having a width smaller than that of the support portion and crimped in a direction intersecting the axial direction; and the support portion contacts the circuit board from the other axial side, the crimping portion has a contact portion that contacts the circuit board from one axial side, The base portion is a bottom wall portion located on the other axial side of the stator; an annular wall portion that protrudes from the bottom wall portion toward one side in the axial direction and surrounds the stator from the radially outer side; and made of resin, The fixing member is a peripheral wall portion located radially between the annular wall portion and the stator and fixed to the stator; a fixing flange portion located on one axial side of the annular wall portion and fixed to the annular wall portion; and made of metal, The cover is fixed to the fixing flange portion.

2. a housing that accommodates the circuit board therein; the housing has a first cover portion that covers the circuit board from one axial side, The rotating electric machine according to claim 1 , wherein the first cover portion has a pressing portion that contacts the contact portion from one axial side.

3. A rotor rotatable around a central axis; a stator positioned radially outside the rotor and surrounding the rotor; a circuit board located on one axial side of the stator; a cover positioned axially between the stator and the circuit board; a housing that accommodates the circuit board therein; Equipped with The cover is a cover body portion located axially between the stator and the circuit board; a protrusion protruding from the cover body toward one axial direction; and The protrusion is a support portion connected to the cover main body portion; a crimped portion having a width smaller than that of the support portion and crimped in a direction intersecting the axial direction; and the support portion contacts the circuit board from the other axial side, the crimping portion has a contact portion that contacts the circuit board from one axial side, the housing has a first cover portion that covers the circuit board from one axial side, The first cover portion has a pressing portion that contacts the contact portion from one axial side.

4. the circuit board has a second penetration portion that penetrates the circuit board in the axial direction, the protrusion includes a first protrusion, a part of the contact portion of which overlaps with the second penetrating portion when viewed in the axial direction; the pressing portion includes a first pressing portion that contacts the contact portion of the first protrusion, The rotating electric machine according to claim 2 or 3, wherein a portion of the first pressing portion that contacts the contact portion overlaps with the second penetrating portion when viewed in the axial direction.

5. the protrusion includes a second protrusion in which a part of the contact portion is positioned outside the circuit board as viewed in the axial direction, the pressing portion includes a second pressing portion that contacts the contact portion of the second protrusion, The rotating electric machine according to claim 2 , wherein a portion of the second pressing portion that comes into contact with the contact portion is located outside the circuit board when viewed in the axial direction.

6. the circuit board has a first penetration portion that penetrates the circuit board in the axial direction, The protrusion is passed through the first through-portion in the axial direction, The rotating electric machine according to claim 1 , wherein the support portion is in contact with a peripheral edge portion of the first penetration portion on the other axial surface of the circuit board.

7. the protrusion has a connection portion that connects the support portion and the contact portion, a width of the connection portion is smaller than a width of the support portion and a width of the contact portion; The rotating electric machine according to claim 1 , wherein the connecting portion has a bent portion that is bent in a direction intersecting the axial direction and that forms a part of the crimped portion.

8. The rotating electric machine according to claim 7 , wherein the bent portion is located on one axial side of the circuit board.

9. The rotating electric machine according to claim 1 , wherein the crimped portion is crimped radially outward.

10. The rotating electric machine according to claim 1 , further comprising a covering portion that covers at least a portion of the contact portion.

11. The rotating electric machine according to claim 10 , wherein the covering portion is a heat-shrinkable tube.

12. The rotating electric machine according to claim 1 , wherein the protrusions are provided in a plurality at intervals in the circumferential direction.

13. The rotating electric machine according to claim 1 , wherein the circuit board has a fixed portion fixed with a bolt on a radially inner side of the contact portion.

14. The rotating electric machine according to claim 1 , wherein the protrusion is made of metal and has a plate shape.

15. The rotating electric machine according to claim 14, wherein the cover is a pressed product.

16. A rotating electric machine according to any one of claims 1 to 15; a pump portion connected to the other axial side of the rotor; A pump comprising:

17. A rotating electric machine according to claim 1 or 2, a pump portion connected to the other axial side of the rotor; Equipped with the support member has a rotor accommodating portion made of a non-magnetic material that is located radially inside the stator and accommodates the rotor therein; The rotor accommodating portion is a second cover portion that covers the rotor from one axial side; a cylindrical portion located between the rotor and the stator in the radial direction and opening to the other axial side; A pump having:

18. 18. The pump according to claim 16 or 17, which is a water pump for pumping water.

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