CN219865364U - electric pump - Google Patents

Abstract

The utility model provides an electric pump having a structure capable of suppressing the increase of manufacturing cost even when the mounted body is changed. The electric pump includes: a motor having a shaft rotatable about a central axis and a rotor; a pump mechanism connected to one axial side of the shaft; a housing accommodating the motor; and a flange portion provided separately from the housing. The housing has: a housing main body portion that houses the motor therein; and a flange fixing portion that is detachable from the flange portion.

Description

Electric pump

Technical Field

The present utility model relates to an electric pump.

Background

The electric pump described in patent document 1 has an intermediate housing that houses a motor. The intermediate housing is provided with a flange for bolting with a housing of an automatic transmission as an object to be mounted. The discharge port of the electric pump is inserted into a discharge oil passage provided in a housing of the body to be mounted.

Prior art literature

Patent literature

Patent document 1: japanese patent application laid-open No. 2014-82918

Disclosure of Invention

Technical problem to be solved by the utility model

When the body to be mounted with the electric pump is changed, the shape of the entire casing of the electric pump needs to be changed. Therefore, there is a problem that the cost of manufacturing the electric pump increases.

The present utility model has been made in view of the above-described problems, and an object thereof is to provide an electric pump having a structure capable of suppressing an increase in manufacturing cost even when a mounted body is changed.

Technical proposal adopted for solving the technical problems

One embodiment of the electric pump of the present utility model includes: 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 houses the motor; and a flange portion provided separately from the housing, the housing having a flange fixing portion that is detachable from the flange portion.

Effects of the utility model

According to one aspect of the present utility model, an electric pump having a structure capable of suppressing an increase in manufacturing cost even when a mounted body is changed can be provided.

Drawings

Fig. 1 is a perspective view showing an electric pump according to an embodiment.

Fig. 2 is a view of an electric pump according to an embodiment as seen from the other side in the axial direction.

Fig. 3 is a cross-sectional view taken along line A-A of fig. 2.

Fig. 4 is an exploded perspective view showing an electric pump of an embodiment.

Fig. 5 is a perspective view showing the electric pump with the flange portion omitted.

Fig. 6 is a view of the flange portion as seen from the other side in the axial direction.

Fig. 7 is a perspective view showing the flange portion.

Fig. 8 is a view of the flange portion from the radially outer side.

Fig. 9 is a view of the electric pump with the cover omitted from the other axial side.

(symbol description)

1, an electric pump; 2, a motor; 3a pump mechanism; 4 a shell; a flange part 5; 6, a bolt; 9 a substrate; 11 a body to be mounted; a 21-axis; a 22 rotor; 41 a housing body portion; 45. 46 a flange fixing portion; a 49 substrate housing section; 52. 53 a housing fixing portion; 54. 55, 56 mounted body fixing portions; 91 an arc-shaped outer edge portion; 211 central axis; 451 a first side; 452 a second side; 491, an arc-shaped inner edge portion; 492 a linear inner edge portion; 522. 542 bosses; 571. 572 line.

Detailed Description

In the following description, the Y axis is appropriately shown in the drawings. The Y-axis represents 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, a direction extending from the central axis 211, that is, a direction parallel to the Y axis is referred to as an "axial direction". The radial direction centered on the central axis 211 is simply referred to as "radial direction". The circumferential direction centered on the central axis 211 is simply referred to as "circumferential direction". The side to which the arrow of the Y axis in the axial direction points (+y side) is referred to as "one side". The side opposite to the side to which the arrow of the Y axis points in the axial direction (-Y side) is referred to as "the other side".

The electric pump 1 of the present embodiment shown in fig. 1 to 3 is attached to an object 11 such as an automatic transmission, for example. The mounted body 11 is shown in fig. 3. 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 includes a shaft 21 and a rotor 22 rotatable about a central axis 211. The pump mechanism 3 is connected to one axial side of the shaft 21. The housing 4 houses the motor 2. The flange portion 5 is provided separately from the housing 4.

The object 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 one side in the axial direction of the electric pump 1 is disposed. The recess 111 opens to the other axial side. The shape of the recess 111 is circular when viewed in the axial direction. The fixing surface 112 is a surface located around the recess 111 and facing the other axial side. The suction passage 113 is provided continuously to one side in the axial direction of the recess 111. The suction port 431 described below is fitted into the suction passage 113.

As shown in fig. 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 in the case body 41. The case body 41 has a substantially cylindrical shape extending in the axial direction about the central axis 211. The cover member 42 is fixed to the other axial side of the housing main body 41. The pump cover member 43 is fixed to one side in the axial direction of the housing main body 41. The pump housing 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 path 113 of the mounted body 11. A clearance 83 is provided between an outer peripheral surface 431a of the suction port 431 and an inner peripheral surface 113a of the suction path 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 mounted body 11, the sealing member 73 is deformed and brought into close contact with the inner peripheral surface 113a of the suction passage 113.

The cover member 42 has a cover cylindrical portion 44, two flange fixing portions 45, 46, a claw portion 47, and a cover portion 48. The cover cylindrical portion 44 has a substantially cylindrical shape extending in the axial direction about the central axis 211. The claw 47 is connected to one axial side of the cap cylinder 44. The plurality of claw portions 47 are arranged at intervals in the circumferential direction. The cover 48 is detachably provided on the other axial side of the cover cylindrical portion 44.

As shown in fig. 3, the cover cylindrical portion 44 is disposed on the other axial side of the housing main body portion 41. The outer diameter of the cover cylindrical portion 44 is substantially the same as the outer diameter of the other axial side portion of the housing main body portion 41. The inner diameter of the cap cylindrical portion 44 is substantially the same as the inner diameter of the other axial side portion of the housing main body portion 41. The claw 47 is fixed to the other end portion of the housing main body 41 in the axial direction. The cover cylindrical portion 44 is fixed to the housing main body portion 41 by the claw portion 47, and is connected to the housing main body portion 41.

As shown in fig. 2, the two flange fixing portions 45, 46 protrude radially outward from the other axial side portion of the outer peripheral surface of the cap cylinder portion 44. The two flange fixing portions 45, 46 protrude radially outward of the outer peripheral surface of the case main body 41, respectively. The two flange fixing portions 45 and 46 are circumferentially arranged at 180 ° intervals.

As shown in fig. 3, the flange fixing portions 45 and 46 include: a first face 451 facing one side in the axial direction; and a second face 452 facing axially opposite side. The first surface 451 is an end surface on one axial side of the flange fixing portions 45, 46. The second surface 452 is the end surface on the other axial side of the flange fixing portions 45, 46. The flange fixing portions 45 and 46 have holes 453 penetrating in the axial direction. The hole 453 is slightly larger than a diameter of a bolt 6 described below, and a clearance 84 is provided between the bolt 6 inserted into the hole 453 and an inner peripheral surface of the hole 453.

As shown in fig. 4, 6, and 7, the flange portion 5 includes: a flange cylindrical portion 51; two housing fixing portions 52, 53; and three mounted body fixing portions 54, 55, 56. The flange cylindrical portion 51 has a substantially cylindrical shape extending in the axial direction around the central axis 211. The flange cylindrical portion 51 is annular. As shown in fig. 7 and 8, the outer diameter of the portion of the flange cylindrical portion 51 on one axial side is smaller than the outer diameter of the portion on the other axial side. The portion of the flange cylindrical portion 51 having a small outer diameter on one side in the axial direction is referred to as a "small diameter portion 513", and the portion having a large outer diameter on the other side in the axial direction is referred to as a "large diameter portion 512". The outer shape of the small diameter portion 513 is smaller than the inner diameter of the concave portion 111. The small diameter portion 513 can be inserted into the recess 111. The outer shape of the large diameter portion 512 is larger than the inner diameter of the concave portion 111. The large diameter portion 512 cannot be inserted into the recess 111. As shown in fig. 6, the two case fixing portions 52, 53 and the three object fixing portions 54, 55, 56 protrude radially outward from the large diameter portion 512.

The inner diameter of the flange cylindrical portion 51 is substantially the same size 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 diameter of the case main body portion 41 and the cover cylindrical portion 44. The case body 41 and the cover member 42 can pass through the inner side of the flange cylindrical portion 51 at the axial side thereof where the flange fixing portions 45 and 46 are not provided. The portion of the cover member 42 on the other axial side and provided with the flange fixing portions 45, 46 cannot pass through the inside of the flange cylindrical portion 51.

The two case fixing portions 52 and 53 are disposed at 180 ° intervals in the circumferential direction with respect to the flange cylindrical portion 51. The case fixing portions 52 and 53 are provided with bolt holes 521 extending in the axial direction. The bolt hole 521 is provided with an internal thread, and can fasten the bolt 6. The two case fixing portions 52, 53 are provided with bosses 522, and the bosses 522 are cylindrical bodies for providing the bolt holes 521. The three body-to-be-mounted fixing portions 54, 55, 56 are arranged at intervals in the circumferential direction. The three object fixing portions 54, 55, 56 are provided with hole portions 541 penetrating in the axial direction. Fixing members such as pins and bolts for fixing the flange portion 5 to the object 11 are inserted into the holes 541. The three object fixing portions 54, 55, 56 are provided with bosses 542, and the bosses 542 are cylindrical bodies for providing the hole 541.

The surface of the flange cylindrical portion 51 on the axial side of the large diameter portion 512, the surface of the bosses 522 of the two case fixing portions 52, 53 on the axial side, and the surface of the bosses 542 of the three object fixing portions 54, 55, 56 are arranged on the same surface orthogonal to the central axis 211. The surface on the axial side of the large diameter portion 512 of the flange cylindrical portion 51, the surface on the axial side of the boss 522 of the two case fixing portions 52, 53, and the surface on the boss 542 side of the three object fixing portions 54, 55, 56 are collectively referred to as flange fixing surfaces 5a.

As shown in fig. 3, the flange portion 5 is inserted into the recess 111 of the object 11 from the other side in the axial direction. The small diameter portion 513 of the flange portion 5 is inserted into the inside of the recess 111. A clearance 81 is provided between the outer peripheral surface of the small diameter portion 513 and the inner peripheral surface of the recess 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 brought into close contact with the inner peripheral surface of the recess 111.

The large diameter portion 512 of the flange portion 5 has an outer shape larger than the inner diameter of the recess 111, and therefore cannot be inserted into the recess 111, since the outer shapes of the two case fixing portions 52, 53 and the three object fixing portions 54, 55, 56 are larger than the inner diameter of the recess 111. The flange portion fixing surface 5a of the flange portion 5 is in contact with the fixing surface 112 around the recess 111.

As shown in fig. 6, the distance between the two case fixing portions 52, 53 and the center axis of the flange cylindrical portion 51 is shorter than the three object fixing portions 54, 55, 56. That is, the two case fixing portions 52, 53 are disposed radially inward of the three object fixing portions 54, 55, 56. The two case fixing portions 52, 53 are arranged at positions offset from the three mounted body fixing portions 54, 55, 56 in the radial direction. The circumferential positions of the two case fixing portions 52, 53 are different from the circumferential positions of the three mounted body fixing portions 54, 55, 56.

The two housing fixing portions 52, 53 are denoted as a first housing fixing portion 52 and a second housing fixing portion 53. The three mounted body fixing portions 54, 55, 56 are denoted as a first mounted body fixing portion 54, a second mounted body fixing portion 55, and a third mounted body fixing portion 56. The first case fixing portion 52 is arranged on a straight line passing through substantially the center of the first and second mounted object fixing portions 54 and 55. The third mounted object fixing portion 56 is arranged on a straight line passing between the first mounted object fixing portion 54 and the second mounted object fixing portion 55. The second case fixing portion 53 is disposed adjacent to the vicinity of the third mounted object fixing portion 56. The third body-to-be-mounted fixing portion 56 and the second housing fixing portion 53 are disposed adjacent to each other on one side which is orthogonal to the straight line 571 connecting the second housing fixing portion 53 and the central axis 211 and which is divided by the straight line 572 passing through the central axis 211, and the first body-to-be-mounted fixing portion 54, the second body-to-be-mounted fixing portion 55, and the first housing fixing portion 52 are disposed on the other side. In fig. 6, one side of the straight line 572 is a right side portion of the straight line 572, and the other side is a left side portion of the straight line 572.

As shown in fig. 6, in the flange cylindrical portion 51, a plurality of hollow portions 58 are provided at portions where the large diameter portion 512, the two case fixing portions 52, 53, and the three object fixing portions 54, 55, 56 are provided, and ribs 59 are provided between adjacent hollow portions 58 and at the outer peripheral portion. The bosses 522 of the two case fixing portions 52, 53 and the bosses 542 of the three mounted body fixing portions 54, 55, 56 are connected to the rib 59.

The flange cylindrical portion 51 has a positioning pin 514 protruding from the flange portion fixing surface 5a toward one side in the axial direction. The positioning pin 514 can be inserted into a hole provided in the fixing surface 112 of the mounted body 11.

As shown in fig. 3 and 9, the case 4 includes a substrate housing portion 49 that surrounds the substrate 9 around the central axis and houses the substrate 9. The substrate 9 is electrically connected to the motor 2. The substrate housing portion 49 is provided at the other end portion of the cover member 42 in the axial direction. The other axial side of the substrate housing portion 49 is provided with a cover portion 48.

As shown in fig. 9, the inner edge of the substrate housing portion 49 has, when viewed in the axial direction: an arcuate inner edge 491 extending in the circumferential direction; and a linear inner edge 492 extending in a linear shape. The outer edge of the base plate 9 has, when viewed in the axial direction: an arcuate outer edge 91 disposed opposite the radially inner side of the arcuate inner edge 491 and extending in the circumferential direction; and a linear outer edge 92 disposed opposite to the linear inner edge 492 in the radial direction and extending linearly. The flange fixing portions 45 and 46 protrude radially outward from portions of the radially outer edge portion of the substrate housing portion 49 that are located radially outward of the linear inner edge portion 492.

The electric pump 1 is mounted to the mounted body 11 in the following manner. 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 object 11. The positioning pin 514 provided on the flange portion 5 is inserted into the hole provided on the fixing surface 112. Fixing members such as pins and bolts for fixing the flange portion 5 to the object 11 are inserted into the holes 541 of the three object fixing portions 54, 55, 56, and the flange portion 5 is fixed to the object 11.

The housing 4 accommodating the motor 2 and the pump mechanism 3 is inserted and fixed into the flange portion 5 of the object 11 from the other side in the axial direction, and the housing 4 is disposed in the recess 111. The suction port 431 is fitted into the suction path 113 of the mounted body 11. The two flange fixing portions 45, 46 of the housing 4 are arranged so as to overlap the other axial side of the two housing fixing portions 52, 53 of the flange portion 5. The first surfaces 451 of the flange fixing portions 45, 46 are in contact with the housing fixing portions 52, 53.

The bolts 6 are inserted into the holes 453 of the flange fixing portions 45 and 46 and the bolt holes 521 of the case fixing portions 52 and 53, and the bolts 6 are fastened to the bolt holes 521 of the case fixing portions 52 and 53. The housing 4 is fixed to the flange 5, and the electric pump 1 is mounted to the body 11.

As shown in fig. 3, when the case 4 is fixed to the flange portion 5, the connection portion between the case body portion 41 and the cover member 42 is disposed inside the flange cylindrical portion 51. A clearance 82 is provided between the inner peripheral surface of the flange cylindrical portion 51 and the outer peripheral surfaces of the case 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 flanged cylinder portion 51, the seal member 72 deforms and comes into close contact with the inner peripheral surface of the flanged cylinder portion 51.

In the electric pump 1 of the present embodiment, the flange portion 5 fixed to the object 11 and the housing 4 are provided separately. Therefore, even when the body 11 to which the electric pump 1 is attached is changed, the shape of the housing 4 does not need to be changed if the shape of the flange 5 is changed, and therefore, an increase in manufacturing cost can be suppressed. Even when the body 11 to be mounted to the electric pump 1 itself is changed, the shape of the flange 5 is changed, so that the housing 4, the motor 2, and the like do not need to be changed, and the motor can be mounted to the desired body 11. Since the housing 4, the motor 2, and the like do not need to be changed, versatility with respect to the required object to be mounted 11 can be improved.

A clearance 84 is provided between the inner peripheral surfaces of the holes 453 of the flange fixing portions 45 and 46 through which the bolts 6 for fixing the housing 4 to the flange portion 5 are inserted and the bolts 6. A clearance 82 is provided between the inner peripheral surface of the flange cylindrical portion 51 and the outer peripheral surfaces of the case main body portion 41 and the cover cylindrical portion 44 of the cover member 42. Therefore, the position adjustment of the housing 4 and the flange portion 5 can be performed within the range of the clearances 82, 84.

The first surfaces 451 of the flange fixing portions 45, 46 of the housing 4 facing the axial direction are in contact with the end surfaces of the bosses 522 of the housing fixing portions 52, 53 of the flange portion 5. By providing the above configuration, the case 4 can be arranged in a stable state with respect to the flange 5. The bolts 6 can be fastened to the bolt holes 521 of the case fixing portions 52 and 53 in a stable state, and the case 4 can be easily and reliably fixed to the flange portion 5. Since the flange fixing portions 45, 46 of the housing 4 are fixed to the housing fixing portions 52, 53 of the flange portion 5 by the bolts 6, the housing 4 can be easily fixed to the flange portion 5. In the present embodiment, the case is shown in which the end surfaces of the bosses 522 of the case fixing portions 52, 53 of the flange portion 5 are fixed in contact with the first surfaces 451 of the flange fixing portions 45, 46 of the case 4, but the surface of the case 4 to which the flange portion 5 is fixed is not limited to the first surfaces 451. For example, the flange 5 may be fixed to the second surfaces 452 of the flange fixing portions 45 and 46 of the case 4.

The flange cylindrical portion 51 of the flange portion 5 has a ring shape surrounding the case body portion 41. Therefore, by inserting the case body 41 through the flange 5, the case body 41 can be easily attached to the flange 5.

The flange fixing portions 45, 46 of the case 4 protrude radially outward from a portion of the radially outer edge portion of the substrate housing portion 49 that is located radially outward of the linear inner edge portion 492. The flange fixing portions 45, 46 can be disposed on the inner side in the circumferential direction, as compared with the case where the flange fixing portions 45, 46 protrude radially outward from the radially outer portion of the arcuate inner edge portion 491 in the radially outer edge portion of the substrate housing portion 49. Therefore, the housing 4 can be prevented from becoming larger in the radial direction.

The circumferential positions of the two case fixing portions 52, 53 are different from the circumferential positions of the three mounted body fixing portions 54, 55, 56. The circumferential position of each of the case fixing portions 52, 53 is a position between the circumferentially adjacent mounted body fixing portions 54, 55, 56. Thus, the two case fixing portions 52 and 53 and the three object fixing portions 54, 55 and 56 do not overlap in the radial direction, and the flange portion 5 can be prevented from becoming larger in the radial direction.

In the flange portion 5, the third to-be-mounted body fixing portion 56 and the second housing fixing portion 53 are disposed adjacent to each other on one side which is orthogonal to the straight line 571 connecting the second housing fixing portion 53 and the central axis 211 and which is divided by the straight line 572 passing through the central axis 211, and the first to-be-mounted body fixing portion 54, the second to-be-mounted body fixing portion 55, and the first housing fixing portion 52 are disposed on the other side. The two case fixing portions 52 and 53 and the three object fixing portions 54, 55, and 56 can be arranged in the flange portion 5 with good balance. The first case fixing portion 52 and the second case fixing portion 53 are disposed opposite to each other on both sides of the straight line 572, and therefore, the case 4 can be stably fixed to the flange portion 5. In other words, the first case fixing portion 52 and the second case fixing portion 53 are not arranged in a concentrated manner in a part of the circumferential direction, and therefore, the portion where the case 4 is fixed to the flange portion 5 is not concentrated, and the case 4 can be stably fixed to the flange portion 5. The first body-to-be-mounted fixing portion 54, the second body-to-be-mounted fixing portion 55, and the third body-to-be-mounted fixing portion 56 are disposed opposite to each other on both sides of the straight line 572, and therefore the flange portion 5 can be stably fixed to the body-to-be-mounted 11. In other words, the first object fixing portion 54, the second object fixing portion 55, and the third object fixing portion 56 are not disposed in a concentrated manner in a part of the circumferential direction, and therefore, the portion where the flange portion 5 is fixed to the object 11 is not concentrated, and the flange portion 5 can be stably fixed to the object 11.

At least a part of the case fixing portions 52, 53 overlaps at least a part of the mounted body fixing portions 54, 55, 56 when viewed in the axial direction. This can concentrate the two case fixing portions 52 and 53 and the three object fixing portions 54, 55, and 56, and thus can reduce the size of the flange portion 5.

The embodiment of the electric pump according to the present utility model has been described above, but the present utility model is not limited to the above embodiment and can be appropriately modified within a range not departing from the spirit thereof.

For example, in the above embodiment, the flange portion 5 has the case fixing portions 52, 53, the case 4 has the flange fixing portions 45, 46, and the flange fixing portions 45, 46 are fixed to the case fixing portions 52, 53. In contrast, the flange portion 5 may have an internal thread provided on its inner periphery and an external thread provided on its outer periphery of the housing body 41, and the external thread of the housing body 41 may be fitted into the internal thread of the flange portion 5. By providing such a structure, the number of components such as the bolts 6 can be reduced, and the housing 4 can be easily attached to the flange portion 5. The flange portion 5 and the case body portion 41 may be appropriately provided with shapes such as concave portions and convex portions, so that the female screw provided on the inner periphery of the flange portion 5 and the male screw provided on the outer periphery of the case body portion 41 can be easily assembled.

In the above embodiment, the case fixing portions 52 and 53 and the flange fixing portions 45 and 46 are joined by the bolts 6, but the case fixing portions 52 and 53 and the flange fixing portions 45 and 46 may be provided with hole portions having no female screw, and the press-in pins may be press-fitted into the hole portions at the same time to be joined.

In the above embodiment, the flange fixing portions 45, 46 of the case 4 protrude radially outward from the radially outer portion of the linear inner edge 492 of the radially outer edge portion of the substrate housing portion 49. The shape of the substrate 9 and the shape of the substrate housing portion 49 may be appropriately set.

In the above embodiment, the first surfaces 451 of the flange fixing portions 45, 46 of the housing 4 facing one side in the axial direction are in contact with the end surfaces of the bosses 522 of the housing fixing portions 52, 53 of the flange portion 5, but the second surfaces 452 of the flange fixing portions 45, 46 of the housing 4 facing the other side in the axial direction may be configured to be in contact with the housing fixing portions 52, 53 of the flange portion 5.

The arrangement of the two case fixing portions 52, 53 and the three object fixing portions 54, 55, 56 with respect to the flange portion 5 may be other than the above. Further, a part of the two case fixing portions 52 and 53 and a part of the object fixing portions 54, 55, and 56 may overlap in the axial direction, or the two case fixing portions 52 and 53 and the object fixing portions 54, 55, and 56 may not overlap.

Claims (11)

1. An electric pump, comprising:

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 houses the motor; and

a flange portion provided separately from the housing,

the housing has:

a housing body portion that houses the motor therein; and

and a flange fixing portion that is detachable from the flange portion.

2. The electric pump according to claim 1, wherein,

the flange fixing portion extends from the housing main body portion in a radial direction intersecting with an axial direction of the shaft, and includes:

a first face facing one axial side of the shaft; and

a second face facing the other axial side of the shaft,

the flange portion is in contact with either one of the first surface and the second surface.

3. The electric pump according to claim 2, wherein,

the flange fixing portion is fixed to the flange portion by a fixing member,

the flange portion has a boss portion to which the fixing member is fixed,

an end surface of the boss portion is in contact with either one of the first surface and the second surface.

4. An electric pump according to claim 3, wherein,

the fixing member is a bolt.

5. The electric pump according to claim 1, wherein,

comprises a substrate electrically connected to the motor,

the housing has a substrate housing portion surrounding the substrate around the central axis and housing the substrate,

the inner edge of the substrate housing portion has, when viewed from the axial direction: an arc-shaped inner edge portion extending in a circumferential direction; and

a linear inner edge part extending linearly,

the outer edge of the substrate has, when viewed from the axial direction:

an arcuate outer edge portion extending in a circumferential direction, the arcuate outer edge portion being disposed so as to face a radially inner side of the arcuate inner edge portion; and

a linear outer edge portion extending in a linear shape, the linear outer edge portion being disposed so as to face a radially inner side of the linear inner edge portion,

the flange fixing portion protrudes radially outward from a portion of the radially outer edge portion of the substrate accommodating portion that is located radially outward of the linear inner edge portion.

6. The electric pump according to claim 1, wherein,

the flange portion is annular and surrounds the housing main body portion.

7. The electric pump according to claim 6, wherein,

the flange portion has an internal thread on an inner circumference,

the housing main body portion has an external thread fastened to the internal thread at an outer periphery.

8. The electric pump according to any one of claims 1 to 7, characterized in that,

the flange portion has:

a plurality of case fixing portions to which the flange fixing portions are fixed, the case fixing portions being arranged at intervals in a circumferential direction; and

a plurality of mounted body fixing portions fixed to the mounted body and arranged at intervals in the circumferential direction,

the circumferential positions of the plurality of case fixing portions and the plurality of mounted body fixing portions are different from each other.

9. The electric pump according to claim 8, wherein,

the circumferential position of each of the plurality of housing fixing portions is a position between the mounted body fixing portions that are circumferentially adjacent to each other.

10. The electric pump according to claim 8, wherein,

the fixed part of the installed body is provided with three fixed parts at intervals in the circumferential direction,

the shell fixing part is provided with two shell fixing parts at intervals in the circumferential direction,

one first mounted body fixing portion of the three mounted body fixing portions is provided adjacent to the first housing fixing portion of one of the two housing fixing portions,

the second body-to-be-mounted fixing portion, the third body-to-be-mounted fixing portion, and the second casing fixing portion of the other of the three body-to-be-mounted fixing portions, excluding the first body-to-be-mounted fixing portion, are disposed on the opposite side of the side on which the first casing fixing portion and the first body-to-be-mounted fixing portion are disposed, with a straight line passing through the central axis and orthogonal to a straight line connecting the first casing fixing portion and the central axis, as viewed in the axial direction.

11. The electric pump according to claim 8, wherein,

at least a part of the case fixing portion overlaps at least a part of the mounted body fixing portion when viewed in the axial direction.