JP2023148663A - electric pump - Google Patents

Abstract

To provide an electric pump having a structure capable of inhibiting increase in manufacturing costs even if a change occurs in an attached body.SOLUTION: An electric pump includes: a motor having a shaft and a rotor which may rotate around a center axis; a pump mechanism connected to one axial side of the shaft; a housing which houses the motor; and a flange part provided separately from the housing. The housing has: a housing body which houses the motor therein; and a flange fixing part which may be detachably attached to the flange part.SELECTED DRAWING: Figure 4

Description

The present invention relates to an electric pump.

The electric pump described in Patent Document 1 has a center housing that houses a motor. The center housing is provided with a flange for bolting to the housing of an automatic transmission to which the center housing is attached. A discharge port of the electric pump is inserted into a discharge oil passage provided in a housing of an attached body.

Japanese Patent Application Publication No. 2014-82918

In the electric pump as described above, when the object to which the electric pump is attached changes, the shape of the entire housing needs to be changed. Therefore, there was a problem in that the cost of manufacturing the electric pump increased.

The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide an electric pump having a structure that can suppress an increase in manufacturing costs even when the object to be attached is changed. Let's choose one.

One aspect of the electric pump according to the present invention includes a motor having a shaft and a rotor rotatable around a central axis, a pump mechanism connected to one side of the shaft in the axial direction, and a housing housing the motor. and a flange portion provided separately from the housing, and the housing includes a flange fixing portion that is removably attached to the flange portion.

According to one aspect of the present invention, it is possible to provide an electric pump having a structure that can suppress an increase in manufacturing cost even when a change occurs in the object to be attached.

FIG. 1 is a perspective view showing an electric pump according to one embodiment. FIG. 2 is a diagram of the electric pump of one embodiment viewed from the other side in the axial direction. FIG. 3 is a cross-sectional view taken along line AA in FIG. 2. FIG. 4 is an exploded perspective view showing an electric pump according to one embodiment. FIG. 5 is a perspective view of an electric pump with the flange portion omitted. FIG. 6 is a view of the flange portion viewed from the other side in the axial direction. FIG. 7 is a perspective view showing the flange portion. FIG. 8 is a diagram of the flange portion viewed from the outside in the radial direction. FIG. 9 is a diagram of the electric pump with the lid omitted, viewed from the other side in the axial direction.

In the following description, the Y-axis is appropriately indicated in the figures. The Y-axis indicates the direction in which the central axis 211 of the shaft 21 of the embodiment described below extends. The central axis 211 shown in each figure is a virtual axis. In the following description, the direction in which the central axis 211 extends, that is, the direction parallel to the Y-axis, will be referred to as the "axial direction." The radial direction centered on the central axis 211 is simply referred to as the "radial direction." The circumferential direction centered on the central axis 211 is simply referred to as the "circumferential direction." In the axial direction, the side toward which the Y-axis arrow points (+Y side) is called "one side." In the axial direction, the side opposite to the side toward which the Y-axis arrow points (-Y side) is called the "other side."

The electric pump 1 according to this embodiment shown in FIGS. 1 to 3 is attached to an attached body 11 such as an automatic transmission, for example. The object to be attached 11 is shown in FIG. The electric pump 1 includes a motor 2, a pump mechanism 3, a housing 4, and a flange portion 5. As shown in FIG. 3, the motor 2 has a shaft 21 and a rotor 22 that are rotatable around a central axis 211. The pump mechanism 3 is connected to one side of the shaft 21 in the axial direction. Housing 4 accommodates motor 2. The flange portion 5 is provided separately from the housing 4.

The attached body 11 has a recess 111, a fixing surface 112, and a suction path 113. The inside of the recess 111 is a region in which a portion of the electric pump 1 on one side in the axial direction is arranged. The recess 111 is open on the other side in the axial direction. The shape of the recess 111 when viewed from the axial direction is circular. The fixing surface 112 is a surface located around the recess 111 and facing the other side in the axial direction. The suction passage 113 is continuously provided on one side of the recess 111 in the axial direction. A suction port 431, which will be described later, is fitted into the suction passage 113.

As shown in FIGS. 3 to 5, the housing 4 includes a housing main body 41, a cover member 42, and a pump cover member 43. The motor 2 is housed inside the housing main body 41 . The housing main body portion 41 has a substantially cylindrical shape that extends in the axial direction centering on the central axis 211 . The cover member 42 is fixed to the other axial side of the housing body portion 41 . The pump cover member 43 is arranged on one side of the housing main body 41 in the axial direction. Pump cover member 43 has a suction port 431. The suction port 431 has a cylindrical shape extending in the axial direction. As described above, the suction port 431 is fitted into the suction passage 113 of the attached body 11. A clearance 83 is provided between the outer peripheral surface 431a of the suction port 431 and the inner peripheral surface 113a of the suction passage 113. An annular seal member 73 is provided on the outer peripheral surface of the suction port 431. When the suction port 431 is fitted into the suction passage 113 of the attached body 11, the seal member 73 deforms and comes into close contact with the inner peripheral surface 113a of the suction passage 113.

The cover member 42 includes a cover cylindrical portion 44, two flange fixing portions 45 and 46, a claw portion 47, and a lid portion 48. The cover cylindrical portion 44 has a substantially cylindrical shape that extends in the axial direction centering on the central axis 211 . The claw portion 47 is connected to one side of the cover cylindrical portion 44 in the axial direction. A plurality of claw portions 47 are arranged at intervals in the circumferential direction. The lid portion 48 is removably provided on the other side of the cover cylindrical portion 44 in the axial direction.

As shown in FIG. 3, the cover cylindrical portion 44 is disposed on the other axial side of the housing body portion 41. As shown in FIG. The outer diameter of the cover cylindrical portion 44 is approximately the same size as the outer diameter of the other axial portion of the housing body portion 41 . The inner diameter of the cover cylindrical portion 44 is approximately the same as the inner diameter of the other axial portion of the housing body portion 41 . The claw portion 47 is fixed to the other end of the housing body portion 41 in the axial direction. By fixing the claw portion 47 to the housing body portion 41, the cover cylindrical portion 44 and the housing body portion 41 are connected.

As shown in FIG. 2, the two flange fixing portions 45 and 46 each protrude outward in the radial direction from the other portion of the outer peripheral surface of the cover cylindrical portion 44 in the axial direction. The two flange fixing parts 45 and 46 each protrude outward in the radial direction from the outer peripheral surface of the housing body part 41. The two flange fixing parts 45 and 46 are arranged at intervals of 180° in the circumferential direction.

As shown in FIG. 3, the flange fixing parts 45, 46 have a first surface 451 facing one axial side and a second surface 452 facing the other axial side. The first surface 451 is an end surface of the flange fixing portions 45 and 46 on one side in the axial direction. The second surface 452 is the other end surface of the flange fixing parts 45 and 46 in the axial direction. The flange fixing parts 45 and 46 have a hole 453 passing through in the axial direction. A clearance 84 is provided between the bolt 6 inserted into the hole 453 and the inner peripheral surface of the hole 453, which is slightly larger in diameter than the bolt 6 described later.

As shown in FIGS. 4, 6, and 7, the flange portion 5 includes a flange cylindrical portion 51, two housing fixing portions 52, 53, and three attached body fixing portions 54, 55, 56. . The flange cylindrical portion 51 has a substantially cylindrical shape that extends in the axial direction centering on the central axis 211 . The flange cylindrical portion 51 is annular. As shown in FIGS. 7 and 8, the portion on one axial side of the flange cylindrical portion 51 has a smaller outer diameter than the portion on the other side in the axial direction. A portion of the flange cylindrical portion 51 having a smaller outer diameter on one side in the axial direction is referred to as a small diameter portion 513, and a portion having a larger outer diameter on the other side in the axial direction is referred to as a large diameter portion 512. The outer diameter of the small diameter portion 513 is smaller than the inner diameter of the recess 111. The small diameter portion 513 can be inserted into the recess 111. The outer diameter of the large diameter portion 512 is larger than the inner diameter of the recess 111. Large diameter portion 512 cannot be inserted into recess 111 . As shown in FIG. 6, the two housing fixing parts 52, 53 and the three attached body fixing parts 54, 55, 56 protrude radially outward from the large diameter part 512.

The inner diameter of the flange cylindrical portion 51 is approximately the same throughout the axial direction. The inner diameter of the large diameter portion 512 and the inner diameter of the small diameter portion 513 are the same size. The inner diameter of the flange cylindrical portion 51 is slightly larger than the outer diameters of the housing main body portion 41 and the cover cylindrical portion 44 . A portion of the housing body portion 41 and the cover member 42 on one side in the axial direction where the flange fixing portions 45 and 46 are not provided can pass through the inside of the flange cylindrical portion 51. The portion of the cover member 42 where the flange fixing portions 45 and 46 are provided on the other axial side cannot pass through the inside of the flange cylindrical portion 51.

The two housing fixing parts 52 and 53 are spaced apart from each other by 180 degrees in the circumferential direction with respect to the flange cylinder part 51. The housing fixing parts 52 and 53 are provided with bolt holes 521 that extend in the axial direction. The bolt hole 521 is provided with a female thread, and the bolt 6 can be fastened thereto. The two housing fixing parts 52 and 53 are provided with a boss 522 which is a cylindrical body for providing a bolt hole 521. The three attached body fixing parts 54, 55, and 56 are arranged at intervals in the circumferential direction. The three attached body fixing parts 54, 55, and 56 are provided with a hole 541 that penetrates in the axial direction. A fixing member such as a pin or a bolt for fixing the flange portion 5 to the attached body 11 is inserted into the hole 541 . A boss 542, which is a cylindrical body for providing a hole 541, is provided on the three attached body fixing parts 54, 55, and 56.

One axial surface of the large diameter portion 512 of the flange cylindrical portion 51, one axial surface of the boss 522 of the two housing fixing portions 52 and 53, and the three attached body fixing portions 54, 55, 56 One side surface of the boss 542 is arranged on the same plane perpendicular to the central axis 211. One axial surface of the large diameter portion 512 of these flange cylindrical portions 51, one axial surface of the boss 522 of the two housing fixing portions 52, 53, and the three attached body fixing portions 54, 55. , 56 are collectively referred to as the flange portion fixing surface 5a.

As shown in FIG. 2, the flange portion 5 is inserted into the recess 111 of the attached body 11 from the other side in the axial direction. The small diameter portion 513 of the flange portion 5 is inserted into the recess 111. A clearance 81 is provided between the outer circumferential surface of the small diameter portion 513 and the inner circumferential surface of the recessed portion 111. An annular seal member 71 is provided around the small diameter portion 513. When the small diameter portion 513 is inserted into the recess 111, the seal member 71 is deformed and comes into close contact with the inner peripheral surface of the recess 111.
The large diameter portion 512 of the flange portion 5, the two housing fixing portions 52, 53, and the three attached body fixing portions 54, 55, 56 are not inserted into the recess 111 because their outer diameters are larger than the inner diameter of the recess 111. The flange portion 5 a contacts the fixing surface 112 around the recess 111 .

As shown in FIG. 6, the two housing fixing parts 52 and 53 are shorter in distance from the central axis of the flange cylindrical part 51 than the three attached object fixing parts 54, 55, and 56. That is, the two housing fixing parts 52 and 53 are arranged radially inside the three attached body fixing parts 54, 55, and 56. The two housing fixing parts 52 and 53 are arranged at positions deviated from the three attached body fixing parts 54, 55, and 56 in the radial direction. The two housing fixing parts 52, 53 and the three attached body fixing parts 54, 55, 56 have different positions in the circumferential direction.

The two housing fixing parts 52 and 53 are referred to as a first housing fixing part 52 and a second housing fixing part 53. The three attached body fixing parts 54, 55, and 56 are referred to as a first attached body fixing part 54, a second attached body fixing part 55, and a third attached body fixing part 56. The first housing fixing part 52 is arranged on a straight line passing approximately at the center of the first attached body fixing part 54 and the second attached body fixing part 55. The third fixed part 56 is arranged on a straight line passing between the first fixed part 54 and the second fixed part 55 . The second housing fixing part 53 is arranged near and adjacent to the third attached fixing part 56 . On one side divided by a straight line 572 that is perpendicular to a straight line 571 connecting the first housing fixed part 52 and the central axis 211 and passes through the central axis 211, there is an adjacent third fixed part 56 and a second housing fixed part. 53 is disposed, and on the other side, a first attached body fixing part 54, a second attached body fixing part 55, and a first housing fixing part 52 are disposed. In FIG. 3, one side divided by the straight line 572 is the right side of the straight line 572, and the other side is the left side of the straight line 572.

As shown in FIG. 6, a plurality of hollowed out portions are provided in the portion of the flange cylindrical portion 51 where the large diameter portion 512, the two housing fixing portions 52, 53, and the three attached body fixing portions 54, 55, 56 are provided. 58 are provided, and ribs 59 are provided between adjacent lightened portions 58 and on the outer periphery. The bosses 522 of the two housing fixing parts 52 and 53 and the bosses 542 of the three attached body fixing parts 54, 55, and 56 are connected to the rib 59.
The flange cylindrical portion 51 has a positioning pin 514 that protrudes from the flange portion fixing surface 5a to one side in the axial direction. The positioning pin 514 can be inserted into a hole provided in the fixing surface 112 of the object 11 to be attached.

As shown in FIGS. 3 and 9, the housing 4 has a substrate accommodating portion 49 that surrounds and accommodates the substrate 9 around the central axis. Substrate 9 is electrically connected to motor 2 . The substrate accommodating portion 49 is provided at the other end of the cover member 42 in the axial direction. A lid portion 48 is provided on one side of the substrate accommodating portion 49 in the axial direction.
As shown in FIG. 9, when viewed from the axial direction, the inner edge of the substrate accommodating portion 49 has an arcuate inner edge portion 491 extending in the circumferential direction and a linear inner edge portion 492 extending linearly. Viewed from the axial direction, the outer edge of the substrate 9 is arranged to face the inner side of the arcuate inner edge part 491 in the radial direction, and the outer edge of the outer edge part 91 that extends in the circumferential direction faces the inner side of the linear inner edge part 492 in the radial direction. It has a linear outer edge part 92 that is arranged in a straight line and extends in a straight line. The flange fixing portions 45 and 46 protrude radially outward from a portion of the radially outer edge portion of the substrate accommodating portion 49 located on the radially outer side of the linear inner edge portion 492.

The electric pump 1 is attached to the attached body 11 as follows. The small diameter portion 513 of the flange portion 5 is placed in the recess 111, and the flange portion fixing surface 5a of the flange portion 5 is brought into contact with the fixing surface 112 of the attached body 11. A positioning pin 514 provided on the flange portion 5 is inserted into a hole provided on the fixing surface 112. Fixing members such as pins and bolts for fixing the flange portion 5 to the object to be attached 11 are inserted into the holes 541 of the three object fixing portions 54, 55, and 56, and the flange portion 5 is attached to the object to be attached 11. Fix it.

The housing 4 housing the motor 2 and the pump mechanism 3 is inserted into the flange portion 5 fixed to the attached body 11 from the other side in the axial direction, and the housing 4 is placed in the recess 111 . The suction port 431 is fitted into the suction passage 113 of the object to be attached 11 . The two flange fixing parts 45 and 46 of the housing 4 are placed on the other side of the two housing fixing parts 52 and 53 of the flange part 5 in the axial direction. First surfaces 451 of the flange fixing parts 45 and 46 contact the housing fixing parts 52 and 53.

Bolts 6 are inserted into holes 453 of flange fixing parts 45 and 46 and bolt holes 521 of housing fixing parts 52 and 53, and bolts 6 are fastened to bolt holes 521 of housing fixing parts 52 and 53. The housing 4 is fixed to the flange portion 5, and the electric pump 1 is attached to an attached body 11.
As shown in FIG. 3, when the housing 4 is fixed to the flange portion 5, a connecting portion between the housing body portion 41 and the cover member 42 is arranged inside the flange cylindrical portion 51. A clearance 82 is provided between the inner circumferential surface of the flange cylindrical portion 51 and the outer circumferential surfaces of each of the housing main body portion 41 and the cover cylindrical portion 44 of the cover member 42 . An annular seal member 72 is provided on the outer peripheral surface of the cover cylindrical portion 44 . When inserted into the flange cylindrical portion 51 , the seal member 72 deforms and comes into close contact with the inner circumferential surface of the flange cylindrical portion 51 .

In the electric pump 1 according to this embodiment, the flange portion 5 fixed to the attached body 11 and the housing 4 are provided separately. Therefore, even if there is a change in the object 11 to which the electric pump 1 is attached, if the shape of the flange portion 5 is changed, there is no need to change the shape of the housing 4, which increases manufacturing costs. can be restrained from doing so. Furthermore, even if the object 11 to which the electric pump 1 is attached changes, by changing the shape of the flange portion 5, there is no need to change the housing 4, motor 2, etc. It can be attached to the mounting body 11. Since there is no need to change the housing 4, motor 2, etc., it is possible to increase the versatility of the mounting object 11 as required.
A clearance 84 is provided between the bolt 6 and the inner peripheral surface of the hole 453 of the flange fixing portions 45 and 46 through which the bolt 6 for fixing the housing 4 to the flange portion 5 is inserted. A clearance 82 is provided between the inner circumferential surface of the flange cylindrical portion 51 and the outer circumferential surfaces of each of the housing main body portion 41 and the cover cylindrical portion 44 of the cover member 42 . Therefore, the positions of the housing 4 and the flange portion 5 can be adjusted within the range of the clearances 82 and 84.

A first surface 451 of the flange fixing parts 45 and 46 of the housing 4 facing one side in the axial direction contacts the end surface of the boss 522 of the housing fixing parts 52 and 53 of the flange part 5. With such a configuration, the housing 4 can be placed in a stable state with respect to the flange portion 5. The bolt 6 can be stably fastened to the bolt hole 521 of the housing fixing part 52, and the housing 4 can be easily and accurately fixed to the flange part 5. Since the flange fixing parts 45 and 46 of the housing 4 are fixed to the housing fixing parts 52 and 53 of the flange part 5 with the bolts 6, the housing 4 can be easily fixed to the flange part 5. In this embodiment, a case is shown in which the end surfaces of the bosses 522 of the housing fixing parts 52 and 53 of the flange part 5 are brought into contact with the first surface 451 of the flange fixing parts 45 and 46 of the housing 4 to be fixed. The surface to which the portion 5 is fixed is not limited to the first surface 451. For example, the flange portion 5 may be fixed to the second surface 452 of the flange fixing portions 45 and 46 of the housing 4.

The flange cylindrical portion 51 of the flange portion 5 has an annular shape surrounding the housing body portion 41 . Therefore, by inserting the housing body part 41 through the flange part 5, the housing body part 41 can be easily attached to the flange part 5.

The flange fixing portions 45 and 46 of the housing 4 protrude radially outward from a portion of the radially outer edge portion of the board accommodating portion 49 located on the radially outer side of the linear inner edge portion 492. The flange fixing parts 45, 46 protrude radially outward from a portion of the radially outer edge of the board accommodating part 49 located on the radially outer side of the arcuate inner edge 491. can be placed inside in the circumferential direction. Therefore, the housing 4 can be prevented from increasing in size in the radial direction.

The two housing fixing parts 52, 53 and the three attached body fixing parts 54, 55, 56 have different positions in the circumferential direction. The circumferential position of each of the housing fixing parts 52 and 53 is between the circumferentially adjacent mounting body fixing parts 54, 55, and 56. Thereby, the two housing fixing parts 52, 53 and the three attached body fixing parts 54, 55, 56 do not overlap in the radial direction, and it is possible to prevent the flange part 5 from increasing in the radial direction.

In the flange portion 5, on one side divided by a straight line 572 that is orthogonal to a straight line 571 connecting the first housing fixing portion 52 and the central axis 211 and passing through the central axis 211, there is an adjacent third attached fixed portion 56 and A second housing fixing section 53 is disposed, and a first attached body fixing section 54, a second attached body fixing section 55, and a first housing fixing section 52 are disposed on the other side. With respect to the flange portion 5, the two housing fixing portions 52, 53 and the three attached body fixing portions 54, 55, 56 can be arranged in a well-balanced manner. Since the first housing fixing part 52 and the second housing fixing part 53 are arranged facing each other on both sides of the straight line 572, the housing 4 can be stably fixed to the flange part 5. In other words, since the first housing fixing part 52 and the second housing fixing part 53 are not arranged in a concentrated manner in a part of the circumferential direction, the locations where the housing 4 is fixed to the flange part 5 are not concentrated, and the flange part The housing 4 can be stably fixed to the housing 5. Since the first mounted body fixing part 54, the second mounted body fixing part 55, and the third mounted body fixing part 56 are arranged facing each other on both sides of the straight line 572, the flange part 5 can be stably attached to the mounted body 11. It can be fixed by In other words, since the first mounted body fixing part 54, the second mounted body fixing part 55, and the third mounted body fixing part 56 are not arranged in a concentrated manner in a part of the circumferential direction, the flange part 5 is connected to the mounted body 11. The housing 4 can be stably fixed to the flange part 5 without being concentrated in the fixed parts.

At least a portion of the housing fixing portions 52, 53 overlaps at least a portion of the attached body fixing portions 54, 55, 56 when viewed from the axial direction. Thereby, the two housing fixing parts 52, 53 and the three attached body fixing parts 54, 55, 56 can be integrated, so that the flange part 5 can be made smaller.

Although the embodiments of the electric pump according to the present invention have been described above, the present invention is not limited to the above embodiments, and can be modified as appropriate without departing from the spirit thereof.
For example, in the above embodiment, the flange part 5 has the housing fixing parts 52 and 53, the housing 4 has the flange fixing parts 45 and 46, and the flange fixing parts 45 and 46 and the housing fixing parts 52 and 53. is fixed. On the other hand, a female thread may be provided on the inner periphery of the flange portion 5 and a male thread may be provided on the outer periphery of the housing body portion 41, and the male thread of the housing body portion 41 may be configured to fit into the female thread of the flange portion 5. . By doing so, the housing 4 can be easily attached to the flange portion 5 while reducing the number of parts such as bolts 6. The flange portion 5 and the housing body portion 41 may be provided with appropriate shapes such as concave portions and convex portions to facilitate assembly of the female thread provided on the inner periphery of the flange portion 5 and the male thread provided on the outer periphery of the housing body portion 41. good.

In the above embodiment, the housing fixing parts 52, 53 and the flange fixing parts 45, 46 are joined with the bolts 6, but the housing fixing parts 52, 53 and the flange fixing parts 45, 46 each have holes without female threads. is provided, and a press-fit pin may be press-fitted into this hole at the same time to join.

In the embodiment described above, the flange fixing portions 45 and 46 of the housing 4 protrude radially outward from a portion of the radially outer edge of the substrate accommodating portion 49 located on the radially outer side of the linear inner edge 492. The shape of the substrate 9 and the shape of the substrate accommodating portion 49 may be set as appropriate.

In the above embodiment, the first surface 451 of the flange fixing parts 45 and 46 of the housing 4 facing one side in the axial direction is in contact with the end surface of the boss 522 of the housing fixing parts 52 and 53 of the flange part 5. The flange fixing parts 45 and 46 of the housing 4 may be configured such that the second surface 452 facing the other side in the axial direction contacts the housing fixing parts 52 and 53 of the flange part 5.

The arrangement of the two housing fixing parts 52, 53 and the three attached body fixing parts 54, 55, 56 with respect to the flange part 5 may be other than the above. Furthermore, the two housing fixing parts 52, 53 and the attached body fixing parts 54, 55, 56 may or may not overlap in part in the axial direction.

DESCRIPTION OF SYMBOLS 1... Electric pump, 2... Motor, 3... Pump mechanism, 4... Housing, 5... Flange part, 6... Bolt, 9... Board, 11... Mounted body, 21... Shaft, 22... Rotor, 41... Housing main body part , 45, 46... Flange fixing part, 49... Board accommodating part, 52, 53... Housing fixing part, 54, 55, 56... Attached object fixing part, 91... Arc-shaped outer edge part, 211... Central axis, 451... No. 1st surface, 452...Second surface, 491...Circular inner edge, 492...Linear inner edge, 522,542...Boss, 542...Boss, 571,572...Straight line

Claims (11)

a motor having a shaft and a rotor rotatable about a central axis;
a pump mechanism connected to one axial side of the shaft;
a housing that accommodates the motor;
a flange provided separately from the housing,
The housing includes:
An electric pump, comprising: a housing body portion that houses the motor therein; and a flange fixing portion that is removably attached to the flange portion. The flange fixing part is
Extending from the housing main body in a radial direction intersecting the axial direction of the shaft,
a first surface facing one side in the axial direction of the shaft;
a second surface facing the other side in the axial direction of the shaft;
The flange portion is
The electric pump according to claim 1, wherein the electric pump contacts either one of the first surface and the second surface. The flange fixing part is
fixed to the flange portion with a fixing member;
The flange portion is
having a boss portion to which the fixing member is fixed;
The end surface of the boss portion is
The electric pump according to claim 2, wherein the electric pump contacts either one of the first surface and the second surface. The fixing member is
The electric pump according to claim 3, which is a bolt. comprising a board electrically connected to the motor,
The housing includes:
a substrate accommodating portion surrounding and accommodating the substrate around the central axis;
The inner edge of the substrate accommodating portion when viewed from the axial direction includes an arcuate inner edge portion extending in the circumferential direction;
having a linear inner edge portion extending linearly,
The outer edge of the substrate when viewed from the axial direction is
an arcuate outer edge portion that is disposed opposite to the radially inner side of the arcuate inner edge portion and extends in the circumferential direction;
a linear outer edge portion that is disposed opposite to the radially inner side of the linear inner edge portion and extends linearly;
has
The flange fixing part is
The electric pump according to any one of claims 1 to 4, wherein the electric pump protrudes radially outward from a portion of the radially outer edge of the substrate accommodating portion located on the radially outer side of the linear inner edge. The flange portion is
The electric pump according to any one of claims 1 to 5, wherein the electric pump has an annular shape surrounding the housing main body. The flange portion is
Has a female thread on the inner circumference,
The housing main body part is
The electric pump according to claim 6, further comprising a male screw fastened to the female screw on the outer periphery. The flange portion is
a plurality of housing fixing parts to which the flange fixing part is fixed and arranged at intervals in the circumferential direction;
a plurality of attached body fixing parts fixed to the attached body and arranged at intervals in the circumferential direction;
has
The electric pump according to any one of claims 1 to 7, wherein the plurality of housing fixing parts and the plurality of attached body fixing parts have mutually different circumferential positions. The circumferential position of each of the plurality of housing fixing parts is
The electric pump according to claim 8, wherein the position is between the mounting body fixing parts adjacent in the circumferential direction. The attached body fixing part is
Three are provided at intervals in the circumferential direction,
The housing fixing part is
Two are provided at intervals in the circumferential direction,
One of the three attached body fixing parts, one of the first attached body fixing parts, is provided adjacent to one of the two housing fixing parts, one of the first housing fixing parts,
When viewed from the axial direction, of the three attached body fixing parts, a second attached body fixing part other than the first attached body fixing part, a third attached body fixing part, and two of the housing fixing parts The other second housing fixing part is
A side on which the first housing fixing part and the first attached body fixing part are arranged, with a straight line passing through the center axis that is perpendicular to a straight line connecting the first housing fixing part and the central axis, and The electric pump according to claim 8 or 9, wherein the electric pump is arranged on opposite sides. The electric pump according to any one of claims 8 to 10, wherein at least a portion of the housing fixing portion overlaps at least a portion of the attached body fixing portion when viewed from the axial direction.

Images