pump

Abstract

To provide a pump having structure that can reduce man hour and time for assembling a circuit board and a control board.SOLUTION: A pump comprises: a motor 10; a pump mechanism 20; a control board 80; and a sensor substrate 53 having a rotation sensor mounted thereon; a sensor base 52 holding the sensor substrate; and a housing 30. The sensor substrate is placed on the other side in an axial direction of the motor, and is placed along a direction crossing the axial direction. The sensor base includes: a plurality of conductive members 52b electrically connecting the sensor substrate with the control board; and a holder 52a holding the plurality of conductive members. Each holder includes an extension holding part 52d extending toward the control board. Each of the conductive members includes an exposed part exposed from the extension holding part. The exposed part includes: an axial extension part extending in the axial direction; and a first connection part 52e that is connected to the control board so as to be bent in the direction crossing the axial direction from an end part on one side in the axial direction of the axial extention part.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a pump.

Background Art

[0002] Patent Document 1 discloses a drive device including a first substrate (sensor substrate) arranged on the motor unit side in the axial direction, a second substrate (control substrate) arranged on the connector side in the axial direction, a switching element mounted on the surface of the first substrate on the motor unit side, and a rotation sensor provided on the substrate arranged closest to the motor unit side for detecting the rotation of the motor unit.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However,when a control substrate is provided along the axial direction separately from the sensor substrate equipped with a rotation sensor, there is a problem that the configuration for connecting the circuit substrate and the control substrate becomes complicated, increasing the man-hours and time required for assembly.

[0005] In view of the above circumstances, an object of the present invention is to provide a pump having a structure capable of reducing the man-hours and time required for assembly.

Means for Solving the Problems

[0006] One embodiment of the pump of the present invention comprises a motor having a rotor rotatable about the axis of a central shaft and a stator facing the rotor with a gap between them; a pump mechanism connected to one side of the rotor in the axial direction; a control board located radially outward from the motor and extending along the axial direction; a sensor board equipped with a rotation sensor for detecting the rotation angle of the rotor; a sensor base for holding the sensor board; and a housing for accommodating the motor, the pump mechanism, the control board, the sensor board, and the sensor base. The sensor board is located on the other side of the motor in the axial direction and is arranged along a direction intersecting the axial direction. The sensor base has a plurality of conductive members that electrically connect the sensor board and the control board, and a holder for holding the plurality of conductive members. The holder has an extended holding portion that extends toward the control board. Each of the plurality of conductive members has an exposed portion that is exposed from the extended holding portion. The exposed portion has an axially extended portion that extends along the axial direction, and a first connecting portion that is bent in a direction intersecting the axial direction from one end of the axially extended portion and connected to the control board. [Effects of the Invention]

[0007] According to one aspect of the present invention, a pump having a structure that can reduce the man-hours and time required for assembly can be provided. [Brief explanation of the drawing]

[0008] [Figure 1] Figure 1 is a cross-sectional view showing a part of the pump of this embodiment. [Figure 2] Figure 2 is an exploded perspective view showing a part of the pump of this embodiment. [Figure 3] Figure 3 is a perspective view showing a part of the housing of this embodiment. [Figure 4] Figure 4 is a cross-sectional perspective view showing a part of the pump of this embodiment. [Figure 5] Figure 5 is a cross-sectional view showing a part of the pump of this embodiment. [Figure 6]Figure 6 is a view of the spring member of the pump in this embodiment, seen from the other axial side. [Figure 7] Figure 7 shows the bearing holder of the pump in this embodiment as viewed from the other axial side. [Figure 8] Figure 8 is a perspective view showing a part of the pump of this embodiment. [Figure 9] Figure 9 shows the pump of this embodiment as viewed from the control board side. [Modes for carrying out the invention]

[0009] In the following description, the X, Y, and Z axes are shown in the figures as appropriate. The Y axis indicates the direction in which the central axis J of the motor in the pump of the embodiment described below extends. The central axis J shown in each figure is a virtual axis. In the following description, the direction in which the central axis J extends, that is, the direction parallel to the Y axis, is referred to as the "axial direction". The radial direction centered on the central axis J is simply referred to as the "radial direction". The circumferential direction centered on the central axis J is simply referred to as the "circumferential direction". Of the axial directions, the side in which the Y-axis arrow points (+Y side) is referred to as the "one axial side". Of the axial directions, the side opposite to the side in which the Y-axis arrow points (-Y side) is referred to as the "other axial side".

[0010] The circumferential direction is indicated by the arrow θ in each figure. The side of the circumferential direction in which arrow θ points is called the "one circumferential side." The side of the circumferential direction opposite to the side in which arrow θ points is called the "other circumferential side." The one circumferential side is the side that moves clockwise around the central axis J when viewed from one axial side (+Y side). The other circumferential side is the side that moves counterclockwise around the central axis J when viewed from one axial side.

[0011] The direction parallel to the Z-axis is called the "up / down Z direction". Within the up / down Z direction, the side where the Z-axis arrow points (+Z side) is called the "up side". Within the up / down Z direction, the side opposite to where the Z-axis arrow points (-Z side) is called the "down side". The direction parallel to the X-axis is called the "width direction X". Within the width direction X, the side where the X-axis arrow points (+X side) is called the "one side of the width direction". Within the width direction X, the side opposite to where the X-axis arrow points (-X side) is called the "other side of the width direction". The axis direction, the up / down Z direction, and the width direction X are all orthogonal to each other.

[0012] Note that the vertical Z direction, width X direction, upper side, and lower side are merely names used to describe the arrangement of each part, and the actual arrangement may differ from those indicated by these names.

[0013] The pump 100 in this embodiment, shown in Figures 1 and 2, is an electric pump attached to equipment mounted on a vehicle. The equipment to which the pump 100 is attached may be an automatic transmission or a drive unit that drives the vehicle's axle. The pump 100 is, for example, an electric oil pump that supplies oil to equipment mounted on a vehicle.

[0014] As shown in Figure 1, the pump 100 comprises a motor 10, a pump mechanism 20, a housing 30, a busbar assembly 51, a sensor base 52, a sensor substrate 53, a cover member 60, a spring member 64, a bearing holder 70, a control board 80, and bearings 43a and 43b. The motor 10 has a rotor 41 and a stator 42.

[0015] The rotor 41 is rotatable about the axis of a central axis J that extends in the axial direction. The rotor 41 has a shaft 41a and a rotor body 41b. The shaft 41a is cylindrical and extends in the axial direction with respect to the central axis J. The shaft 41a is rotatably supported about the central axis J by bearings 43a and 43b. In other words, bearings 43a and 43b rotatably support the rotor 41. In this embodiment, bearings 43a and 43b are rolling bearings. Bearings 43a and 43b are ball bearings. Bearing 43a rotatably supports the portion of the shaft 41a located on the other axial side (-Y side) of the rotor body 41b. Bearing 43b rotatably supports the portion of the shaft 41a located on the one axial side (+Y side) of the rotor body 41b. The rotor body 41b is fixed to the outer circumferential surface of the shaft 41a. Although not shown in the diagram, the rotor body 41b includes a rotor core and a rotor magnet.

[0016] The stator 42 faces the rotor 41 with a gap therebetween. The stator 42 is located radially outside the rotor 41. The stator 42 includes a stator core 42a, an insulator 42b, and a plurality of coils 42c. The stator core 42a includes a cylindrical core back 42d centered on a central axis J and a plurality of teeth 42e extending radially inward from the core back 42d. The plurality of coils 42c are attached to respective ones of the plurality of teeth 42e via the insulator 42b.

[0017] The housing 30 houses the motor 10, the pump mechanism 20, the bus bar assembly 51, the sensor base 52, the sensor substrate 53, the cover member 60, the spring member 64, the bearing holder 70, and the control board 80 therein. The housing 30 includes a housing main body portion 31, a board cover 32, a lid portion 33, and a pump cover 34. The housing main body portion 31, the board cover 32, the lid portion 33, and the pump cover 34 are separate members from each other. The board cover 32 is fixed to the lower side of the housing main body portion 31. The lid portion 33 is fixed to the other axial side (-Y side) of the housing main body portion 31. The pump cover 34 is fixed to the one axial side (+Y side) of the housing main body portion 31.

[0018] The housing main body portion 31 includes a motor housing 35, a pump housing 36, a board housing 37a, and a mounting portion 37b. In the present embodiment, the motor housing 35, the pump housing 36, the board housing 37a, and the mounting portion 37b are parts of the same single member.

[0019] In the present embodiment, the motor housing 35 is cylindrical and extends in the axial direction. The end portion on the other axial side (-Y side) of the motor housing 35 is the end portion on the other axial side of the housing main body portion 31 and is an opening 35a that opens to the other axial side. That is, the housing main body portion 31 has an opening 35a that opens to the other axial side. The opening 35a is closed by the lid portion 33.

[0020] The motor housing 35 has a cylindrical motor housing body 35b extending in the axial direction, an annular fixed portion 39 projecting radially outward from the other axial end (-Y side) of the motor housing body 35b, and a frame-shaped portion 38 projecting axially outward from the radial outer edge of the fixed portion 39. The motor housing body 35b is cylindrical with a central axis J. The motor housing body 35b houses the rotor 41 and stator 42 inside. Thus, the housing body 31 houses the rotor 41 and stator 42 inside.

[0021] The frame-shaped portion 38 is connected to the other axial side (-Y side) of the motor housing body 35b via the fixed portion 39. The other axial end of the frame-shaped portion 38 is the other axial end of the motor housing 35, which is the opening 35a. In other words, the opening 35a is provided in the frame-shaped portion 38. As shown in Figure 2, the frame-shaped portion 38 surrounds the central axis J. In this embodiment, the frame-shaped portion 38 is a roughly square frame with rounded corners. The radially inner surface of the frame-shaped portion 38 is located radially outward from the inner circumferential surface of the motor housing body 35b.

[0022] The frame-shaped portion 38 has a plurality of first screw-fastening portions 38r. Each of the plurality of first screw-fastening portions 38r has a female screw hole 38n recessed from the other axial side (-Y side) of the frame-shaped portion 38 toward one axial side (+Y side). As shown in Figure 2, the lid portion 33 is fixed to each first screw-fastening portion 38r with a screw 94. The screw 94 is passed through a through hole 33b provided in the lid portion 33 from the other axial side and tightened into the female screw hole 38n. In this way, the lid portion 33 is fixed to the frame-shaped portion 38. As shown in Figures 2 and 3, in this embodiment, the plurality of first screw-fastening portions 38r are arranged with spacing between them along the circumferential direction.

[0023] The fixed portion 39 is the part to which the bearing holder 70 is fixed. As shown in Figure 3, the fixed portion 39 has a surface facing the other axial side (-Y side) and is annular in shape surrounding the central axis J. The radial inner edge of the fixed portion 39 is circular in shape with the central axis J as the center. The radial outer edge of the fixed portion 39 is connected to the radial inner surface of the frame-shaped portion 38. The fixed portion 39 protrudes radially inward from the radial inner surface of the frame-shaped portion 38. The fixed portion 39 is located further axially to one side (+Y side) than the end face of the frame-shaped portion 38 on the other axial side.

[0024] The fixed portion 39 has a plurality of second screw fastening portions 39r. Each of the plurality of second screw fastening portions 39r has a female screw hole 39e recessed from the other axial side (-Y side) of the fixed portion 39 toward one axial side (+Y side). As shown in Figure 2, a bearing holder 70 is fixed to each second screw fastening portion 39r with a screw 92. The screw 92 is passed through a through hole 72e provided in the bearing holder 70 from the other axial side and tightened into the female screw hole 39e. In this way, the bearing holder 70 is fixed to the fixed portion 39. In this embodiment, the plurality of second screw fastening portions 39r are arranged spaced apart from each other along the circumferential direction.

[0025] As shown in Figure 1, the pump housing 36 is connected to one axial side (+Y side) of the motor housing 35. The pump housing 36 has a housing recess 36a which is a recess that opens to one axial side. The opening on one axial side of the housing recess 36a is closed by the pump cover 34.

[0026] The substrate housing 37a is located below the motor housing 35 and the pump housing 36. The substrate housing 37a extends in the axial direction. One axial end (+Y side) of the substrate housing 37a protrudes axially beyond the pump housing 36 and the pump cover 34. A connector portion 90 is provided at the axial end of the substrate housing 37a. The substrate housing 37a has a housing recess 37c which is a recess that opens downwards. The lower opening of the housing recess 37c is closed by the substrate cover 32. The control board 80 is held inside the housing recess 37c.

[0027] The mounting portion 37b is located on one side (+X side) in the width direction of the motor housing 35 and the pump housing 36. The mounting portion 37b is the part that is fixed to the vehicle equipment by screws.

[0028] The housing body 31 has a through hole 31a that axially connects the inside of the motor housing 35 and the inside of the housing recess 36a. An oil seal 44 is held inside the through hole 31a, sealing the space between the inner circumferential surface of the through hole 31a and the outer circumferential surface of the shaft 41a. A bearing 43b is held inside the through hole 31a on the other axial side (-Y side) of the oil seal 44.

[0029] As shown in Figure 3, the housing body 31 has an insertion hole 31b that radially connects the inside of the motor housing 35 and the inside of the housing recess 37c. In other words, the housing 30 has an insertion hole 31b. The insertion hole 31b is provided on the other axial side of the housing body 31 and penetrates the wall between the inside of the motor housing 35 and the inside of the housing recess 37c in the vertical direction Z. The insertion hole 31b is a hole that is elongated in the direction intersecting the axial direction (X-axis direction).

[0030] As shown in Figure 2, the lid portion 33 has an outer shape that is approximately square with rounded corners when viewed in the axial direction. The outer shape of the lid portion 33 when viewed in the axial direction is the same as the outer shape of the frame portion 38 when viewed in the axial direction. The lid portion 33 has a plurality of third screw fastening portions 33a on its radial outer edge. Each of the plurality of third screw fastening portions 33a has a through hole 33b that penetrates the lid portion 33 in the axial direction. Each third screw fastening portion 33a is fixed to each first screw fastening portion 38r by a screw 94 that is passed through the through hole 33b from the other axial side (-Y side). A breather 91 is attached to the lid portion 33.

[0031] As shown in Figure 4, the cover member 60 is located inside the motor housing body 35b on the other axial side (-Y side) of the stator 42. The cover member 60 is located on one axial side (+Y side) of the bearing holder 70. In this embodiment, the cover member 60 is made of resin. The cover member 60 has an outer cylinder portion 61, an inner cylinder portion 63, and a connecting portion 62.

[0032] The outer cylinder portion 61 is cylindrical in shape, surrounding the central axis J. The outer cylinder portion 61 is open on one axial side (+Y side). The outer cylinder portion 61 is fitted inside the motor housing body 35b. The end of the outer cylinder portion 61 on one axial side (+Y side) surrounds the portion of the insulator 42b and coil 42c that protrudes from the stator core 42a on the other axial side (-Y side).

[0033] As shown in Figure 5, the outer cylinder portion 61 has a second notch portion 61f cut out in a direction away from the insertion hole 31b, at a position radially opposite to the insertion hole 31b of the housing 30. The second notch portion 61f is located in the center of the width direction X in the lower portion of the outer cylinder portion 61 on the other axial side (-Y side). The second notch portion 61f is located above the insertion hole 31b. The lower surface of the second notch portion 61f is a flat surface perpendicular to the vertical direction Z. The second notch portion 61f has an inclined portion 61g on the edge on the other axial side. The inclined portion 61g extends in the width direction X. The inclined portion 61g is inclined in a direction that is located on one axial side (+Y side) as it extends radially outward. The inclined portion 61g is made, for example, by chamfering the edge on the other axial side of the second notch portion 61f. The inclined portion 61g may be formed by rounding the edge of the second notch portion 61f on the other axial side.

[0034] As shown in Figure 4, the inner cylinder portion 63 is cylindrical, surrounding the central axis J. The inner cylinder portion 63 is open on both axial sides. The inner cylinder portion 63 is located radially inward of the outer cylinder portion 61. The end of the inner cylinder portion 63 on one axial side (+Y side) is located on the other axial side (-Y side) than the end of the outer cylinder portion 61 on the same axial side.

[0035] The connecting portion 62 connects the other axial end (-Y side) of the outer cylinder portion 61 to the other axial end of the inner cylinder portion 63. The connecting portion 62 is an annular shape surrounding the central axis J. The connecting portion 62 is located slightly to one axial side (+Y side) from the other axial end of the outer cylinder portion 61. As shown in Figure 4, the connecting portion 62 has a surface 62a facing the other axial side. The surface 62a faces the bearing holder 70 in the axial direction. The surface 62a is an annular shape surrounding the central axis J. The surface 62a is a flat surface perpendicular to the axial direction.

[0036] As shown in Figure 1, the spring member 64 is located on the other axial side (-Y side) of the cover member 60. The spring member 64 is positioned on the surface 62a of the connecting portion 62. The spring member 64 is fixed to the surface 62a by welding. As shown in Figure 6, the spring member 64 has an annular main body portion 64a surrounding the central axis J, and three spring pieces 64b extending from the main body portion 64a.

[0037] The main body portion 64a is fixed to the surface 62a. The main body portion 64a has three protruding portions 64a1 that extend radially outward and three notched portions 64a2 that are concavely cut out radially inward. These protruding portions 64a1 and notched portions 64a2 are alternately located around the central axis J. In this embodiment, the spring member 64 is provided such that one of the three notched portions 64a2 faces the control board 80 side (-Z side). The notched portion 64a2 that faces the control board 80 side is located above the second notched portion 61f when viewed in the axial direction and extends in the width direction X along the second notched portion 61f.

[0038] The three spring segments 64b are arranged at equal intervals in the circumferential direction. The three spring segments 64b extend circumferentially along the outer circumference of the inner cylinder portion 63. The spring segments 64b are provided radially inward of the protruding portion 64a1 of the main body portion 64a. The base end 64b1 of the spring segment 64b is connected to the main body portion 64a, and the tip 64b2 is a free end. The spring segment 64b has a curved shape toward the other axial side (-Y side) as it approaches the tip 64b2.

[0039] As shown in Figure 4, the spring member 64 is positioned between the cover member 60 and the bearing holder 70. When the bearing holder 70 is assembled into the housing 30, each spring segment 64b of the spring member 64 is pushed by the bearing holder 70 from the other axial side toward the one axial side (+Y side), causing it to elastically deform toward the one axial side. As a result, the spring member 64 exists between the cover member 60 and the bearing holder 70 in a state where each spring segment 64b is elastically deformed. In this state, the elastic restoring force of the spring segments 64b acts axially, pushing the cover member 60 toward the one axial side, thus suppressing axial displacement of the cover member 60.

[0040] Furthermore, in this embodiment, by providing three notches 64a2 in the circumferential direction of the spring member 64, the degree of freedom in attaching the spring member 64 to the cover member 60 is increased, making assembly easier. Also, since the three spring pieces 64b are evenly arranged in the circumferential direction, the three spring pieces 64b can stably hold the cover member 60 in the axial direction.

[0041] The bearing holder 70 is a member that holds the bearing 43a. The bearing holder 70 is located inside the motor housing body 35b on the other axial side (-Y side) of the cover member 60. The bearing holder 70 is positioned opposite the sensor base 52 on one axial side (+Y side). As shown in Figures 2 and 7, the bearing holder 70 has a holder body portion 71 and a plurality of protrusions 72. The holder body portion 71 has a retaining cylinder portion 71a and a flange portion 71b. The retaining cylinder portion 71a is cylindrical, surrounding the central axis J. The retaining cylinder portion 71a is open on both axial sides. As shown in Figure 1, the retaining cylinder portion 71a is inserted into the inner cylinder portion 63 from the other axial side (-Y side). In this embodiment, the retaining cylinder portion 71a is fitted into the inner cylinder portion 63. The end of the retaining cylinder portion 71a on the other axial side (-Y side) is located on the other axial side of the inner cylinder portion 63.

[0042] An annular wall portion 71c is provided at the axial center of the inner circumferential surface of the retaining cylinder portion 71a, projecting radially inward. The annular wall portion 71c is an annular shape surrounding the central axis J. A bearing 43a is fitted and held in the portion of the inside of the retaining cylinder portion 71a located on one axial side (+Y side) of the annular wall portion 71c. In this way, the holder body portion 71 holds the bearing 43a. A rib 71d is provided on the inner circumferential surface of the portion of the retaining cylinder portion 71a located on the other axial side (-Y side) of the annular wall portion 71c, projecting radially inward. The rib 71d extends in the axial direction. Multiple ribs 71d are provided at intervals in the circumferential direction.

[0043] The other axial side (-Y side) of the shaft 41a passes through the inside of the retaining cylinder portion 71a. The other axial end of the shaft 41a is located inside the portion of the retaining cylinder portion 71a that is located axially to the other side of the annular wall portion 71c. A sensor magnet 46 is attached to the other axial end of the shaft 41a via a mounting member 45. The mounting member 45 and the sensor magnet 46 are located inside the portion of the retaining cylinder portion 71a that is located axially to the other side of the annular wall portion 71c.

[0044] The flange portion 71b protrudes radially outward from the other axial end (-Y side) of the retaining cylinder portion 71a. As shown in Figures 2 and 7, the flange portion 71b is annular in shape surrounding the central axis J. A first notch 71f is provided in the center of the lower part of the flange portion 71b in the width direction X, and penetrates the flange portion 71b axially. The first notch 71f opens downward. The first notch 71f is located radially opposite to the insertion hole 31b of the housing 30 and is notched away from the insertion hole 31b. In other words, the bearing holder 70 has a first notch 71f located opposite the insertion hole 31b and notched away from the insertion hole 31b. The first notch 71f is a portion that is concavely notched radially inward from the outer peripheral edge of the flange portion 71b.

[0045] The flange portion 71b is provided with a female screw hole 71e that is recessed from the other axial side (-Y side) of the flange portion 71b toward the one axial side (+Y side). The female screw hole 71e, for example, penetrates the flange portion 71b in the axial direction. Multiple female screw holes 71e are provided at equal intervals along the circumference. In this embodiment, four female screw holes 71e are provided.

[0046] As shown in Figure 1, the flange portion 71b is positioned opposite the other axial side (-Y side) of the cover member 60. The outer diameter of the flange portion 71b is approximately the same as the outer diameter of the cover member 60. The axial end (+Y side) of the flange portion 71b is fitted radially inward of the fixed portion 39. The flange portion 71b is provided within the axial end (-Y side) of the motor housing body 35b, and substantially closes that end.

[0047] As shown in Figure 2, the multiple protrusions 72 project radially outward from the holder body 71. In this embodiment, the multiple protrusions 72 project radially outward from the radial outer edge of the flange portion 71b. The radially outer portion of the protrusion 72 is recessed on one axial side (+Y side) compared to the radially inner portion of the protrusion 72. The radially outer portion of the protrusion 72 is provided with a through hole 72e that penetrates the protrusion 72 in the axial direction. A stepped portion 72f is provided between the radially outer portion and the radially inner portion of the protrusion 72. The stepped portion 72f is arc-shaped when viewed in the axial direction, centered on the through hole 72e.

[0048] Multiple protrusions 72 are provided at intervals in the circumferential direction. There are four protrusions 72: protrusions 72a, 72b, 72c, and 72d. Protrusion 72a protrudes diagonally upward on one side in the width direction (+X side). Protrusion 72b protrudes diagonally downward on one side in the width direction. Protrusion 72c protrudes diagonally downward on the other side in the width direction (-X side). Protrusion 72d protrudes diagonally upward on the other side in the width direction.

[0049] Multiple protrusions 72 are each fixed to multiple second screw-fastening portions 39r by screws 92. The screws 92 are passed through the through holes 72e from the other axial side (-Y side) and tightened into the female screw holes 39e. In this way, the bearing holder 70 is fixed to the housing 30. The surface of one axial side (+Y side) of the protrusion 72 is in contact with the surface of the second screw-fastening portion 39r on the other axial side. The surface of the protrusion 72 on the other axial side is located on the other axial side than the surface of the other axial side of the portion of the fixed portion 39 other than the second screw-fastening portion 39r, and is located on one axial side than the surface of the other axial side of the frame-shaped portion 38.

[0050] As shown in Figure 7, the protrusion 72a is fixed to the second screw-fastening portion 39a with a screw 92. The protrusion 72b is fixed to the second screw-fastening portion 39b with a screw 92. The protrusion 72c is fixed to the second screw-fastening portion 39c with a screw 92. The protrusion 72d is fixed to the second screw-fastening portion 39d with a screw 92.

[0051] The circumferential dimension of the projection 72 decreases as it extends radially outward. The radial outer edge of the projection 72 is an arc shape that is convex radially outward when viewed axially. The edge 72g on one circumferential side (+θ side) of the projection 72 extends linearly in a direction inclined circumferentially with respect to the radial direction. The edge 72g is located on the other circumferential side (-θ side) as it extends radially outward. The edge 72h on the other circumferential side (-θ side) of the projection 72 extends linearly in a direction inclined circumferentially with respect to the radial direction. The edge 72h is located on one circumferential side (+θ side) as it extends radially outward. The edges 72g and 72h approach each other as they extend radially outward. The inclination of the edge 72g in the circumferential direction with respect to the radial direction is smaller than the inclination of the edge 72h in the circumferential direction with respect to the radial direction.

[0052] The edge 72g of the projection 72 is positioned opposite the edge 39g of the second screw-fastening portion 39r. The edge 72g of the projection 72 and the edge 39g of the second screw-fastening portion 39r extend parallel to each other. The edge 72h of the projection 72 is positioned opposite the edge 39h of the second screw-fastening portion 39r. The edge 72h of the projection 72 and the edge 39h of the second screw-fastening portion 39r extend parallel to each other.

[0053] Each projection 72 is positioned circumferentially opposite the inner portion 38p of each first screw-fastening portion 38r. The portion of the projection 72 that faces the inner portion 38p in the circumferential direction has a shape that follows the circumferential side surface of the inner portion 38p. In this embodiment, the portion of the projection 72 that faces the inner portion 38p in the circumferential direction is the edge portion 72g. The circumferential side surface of the inner portion 38p is part of the arc-shaped inner edge of the inner portion 38p. In this embodiment, when viewed in the axial direction, the edge portion 72g extends along the tangent line that is in contact with the portion of the inner portion 38p closest to the projection 72.

[0054] As shown in Figure 1, the control board 80 is located radially outward from the motor 10. The control board 80 extends along the axial direction. The control board 80 has a main board body 81 that extends along the axial direction and whose surface faces in the vertical direction Z, and a plurality of electronic components 82 mounted on the main board body 81. As shown in Figures 8 and 9, the electronic components 82 include a microcontroller 83 and a plurality of switching elements 84, 85. The microcontroller 83 is located near the approximate center of the lower surface of the main board body 81 in the width direction X and axial direction. The plurality of switching elements 84, 85 are transistors. The plurality of switching elements 84, 85 are spaced apart from the microcontroller 83 on the other axial side (-Y side). There are three of each of the switching elements 84 and 85. The three switching elements 84 are arranged at equal intervals in the width direction X. The three switching elements 85 are arranged adjacent to the other axial side of the three switching elements 84, and are spaced equally in the width direction X. The six switching elements 84 and 85 constitute a three-phase inverter circuit that supplies power to the stator 42. Multiple terminals 90a of the connector section 90 are connected to one axial side (+Y side) end of the control board 80.

[0055] As shown in Figure 1, the busbar assembly 51 is passed through the insertion hole 31b in the vertical direction Z and is provided spanning the inside of the motor housing 35 and the inside of the housing recess 37c. The busbar assembly 51 has a resin busbar holder 51a and a plurality of busbars 51b held by the busbar holder 51a. The busbar holder 51a is located radially outward of the bearing holder 70 and is positioned between the bearing holder 70 and the control board 80. The busbar holder 51a holds the plurality of busbars 51b. The plurality of busbars 51b electrically connect the coil 42c and the control board 80. In this embodiment, there are three busbars 51b.

[0056] As shown in Figures 4, 5, and 8, each of the multiple busbars 51b is partially embedded and held in a busbar holder 51a. Each busbar 51b has a coil connection portion 51b3 that is exposed from the busbar holder 51a. The coil connection portion 51b3 is the portion that connects to a lead wire 42c1 extending from the coil 42c of the stator 42. The lead wire 42c1 extends from the coil 42c toward the other axial direction (-Y side). The connection of the coil connection portion 51b3 to the coil 42c electrically connects the busbar 51b to the stator 42. The coil connection portion 51b3 is located radially between the outer cylinder portion 61 and the inner cylinder portion 63 of the cover member 60. The coil connection portion 51b3 is covered from the radially outside by the outer cylinder portion 61 of the cover member 60.

[0057] The busbar 51b has an exposed portion 51b1 that is exposed from the busbar holder 51a. The exposed portion 51b1 has a bent shape (crank shape) and includes an extension portion 51ba that extends almost vertically downward (-Z direction) from the lower end of the busbar holder 51a, an axial extension portion 51bb that extends axially along the axis from the lower end of the extension portion 51ba toward one side in the axial direction (+Y side), and a second connecting portion 51bc that extends almost vertically downward (-Z direction) from the end of the axial extension portion 51bb on one side in the axial direction (+Y side). In other words, the busbar 51b has a second connecting portion 51bc.

[0058] In this embodiment, the axial end of the axial extension 51bb on one axial side (+Y side) is a semi-circular arc shape that curves upward (+Z direction). At least the exposed portion 51b1 of the busbar 51b has a plate thickness of, for example, 0.8 mm or more and 1.0 mm or less, which is relatively thick. Therefore, by providing a curved arc-shaped portion of the busbar 51b to make it more flexible, the stress generated in the busbar 51b by the arc-shaped portion can be easily relieved, and stress on the connection portion between the busbar 51b and the control board 80 can be suppressed. Thus, it is easier to maintain a suitable connection between the busbar 51b and the control board 80.

[0059] The second connection portion 51bc is connected to the control board 80. The second connection portion 51bc penetrates the board body 81 from top to bottom in the thickness direction. The second connection portion 51bc is electrically connected to the board body 81, for example, by soldering. In this embodiment, each of the three second connection portions 51bc on the three busbars 51b is arranged in a straight line with spacing in the width direction X. The second connection portion 51bc protrudes downward from the board body 81 and is exposed to the outside of the housing 30 through the lower opening of the housing recess 37c when the board cover 32 is not attached, making it easy to solder the second connection portion 51bc to the control board 80.

[0060] As shown in Figure 2, the sensor base 52 is located on the other axial side (-Y side) of the bearing holder 70. The sensor base 52 is located between the bearing holder 70 and the cover portion 33 in the axial direction. The sensor base 52 is located on the other axial side of the bus bar assembly 51. In this embodiment, the motor 10, bus bar assembly 51, and sensor base 52 are arranged in this order from one axial side (+Y side) to the other axial side. This makes it possible to place the bus bar assembly 51, which connects the motor 10 and the control board 80, close to the motor 10. The sensor base 52 is a component that holds the sensor substrate 53. The sensor base 52 has a resin holder 52a and a plurality of conductive members 52b held by the holder 52a. The holder 52a holds the plurality of conductive members 52b. The holder 52a has a substrate holding portion 52c and an extended holding portion 52d.

[0061] The substrate holder portion 52c is approximately circular in shape when viewed in the axial direction. The substrate holder portion 52c is fixed to the bearing holder 70 by a screw 93. The screw 93 is passed through a through hole provided in the substrate holder portion 52c from the other axial side (-Y side) and tightened into the female screw hole 71e. As shown in Figure 1, the substrate holder portion 52c is positioned opposite the bearing holder 70 on the other axial side. Furthermore, the substrate holder portion 52c is located on the other axial side (-Y side) of the busbar assembly 51.

[0062] The stretchable holding portion 52d extends toward the control board 80. More specifically, the stretchable holding portion 52d extends toward the control board 80 from the lower end of the board holding portion 52c. The stretchable holding portion 52d is passed through the insertion hole 31b. The stretchable holding portion 52d has a wide, flat shape in a direction intersecting the axial direction (width direction X) to match the shape of the insertion hole 31b of the housing body portion 31. In this embodiment, five conductive members 52b are held at approximately equal intervals in the width direction X of the stretchable holding portion 52d.

[0063] The extended holding portion 52d has a first portion 52e that extends axially from the lower end of the substrate holding portion 52c toward one axial side (+Y side), and a second portion 52f that bends from the axial end of the first portion 52e in a direction intersecting the axial direction and extends toward the control substrate 80. A part of the first portion 52e is passed axially through, for example, a first notch 71f provided in the bearing holder 70. The second portion 52f extends downward from the axial end of the first portion 52e. The second portion 52f is inserted into the insertion hole 31b of the housing body portion 31.

[0064] In this embodiment, the bearing holder 70 and the stretchable holding portion 52d overlap each other in a direction intersecting the axial direction, at least in part. In this embodiment, the stretchable holding portion 52d is located below the bearing holder 70. In other words, the bearing holder 70 and the stretchable holding portion 52d overlap each other in the vertical direction Z.

[0065] The multiple conductive members 52b are elongated, plate-shaped members made of metal. Parts of the multiple conductive members 52b are embedded in the holder 52a and held by the holder 52a. The multiple conductive members 52b protrude from the lower end of the second portion 52f and are connected to the control board 80. The multiple conductive members 52b electrically connect the sensor board 53 and the control board 80.

[0066] Each of the multiple conductive members 52b has an exposed portion 52b1 that is exposed from the stretched holding portion 52d. In this embodiment, the exposed portion 52b1 is exposed from the tip surface (lower end surface) of the second portion 52f of the stretched holding portion 52d. The exposed portion 52b1 has an extension portion 52ba that extends vertically downward (-Z direction) from the lower end surface (tip surface) of the second portion 52f, an axial extension portion 52bb that extends along the axial direction (Y direction) toward one side in the axial direction (+Y side) from the lower end of the extension portion 52ba, and a first connecting portion 52bc that is bent in a direction intersecting the axial direction from the end of the axial extension portion 52bb on one side in the axial direction (+Y side) and connected to the control board 80.

[0067] As shown in Figure 8, the first connection portion 52bc penetrates the control board 80 from the motor 10 side. In other words, the first connection portion 52bc penetrates the control board 80 in a direction away from the motor 10. The first connection portion 52bc penetrates the main board body 81 from top to bottom. The first connection portion 52bc is electrically connected to the main board body 81, for example, by soldering. In this embodiment, each of the five first connection portions 52bc on the five conductive members 52b is arranged in a straight line with spacing in the width direction X. The first connection portion 52bc protrudes downward from the control board 80 by penetrating the control board 80 from the motor 10 side. Therefore, when the board cover 32 is not attached, the first connection portion 52bc is exposed to the outside of the housing 30 through the lower opening of the housing recess 37c. This makes it easier to solder the first connection portion 52bc to the control board 80.

[0068] The first connection portion 52bc is connected to the control board 80 on the other axial side (-Y side) of the second connection portion 51bc of the bus bar 51b. Since the connection position of the sensor base 52 to the control board 80 and the connection position of the bus bar assembly 51 to the control board 80 can be separated in the axial direction, the man-hours and time required for assembly can be reduced. Furthermore, the five first connection portions 52bc are arranged parallel to the arrangement of the three second connection portions 51bc on the other axial side (-Y) from the second connection portion 51bc. In this embodiment, the five conductive members 52b are arranged at equal intervals in the width direction X without intersecting the width direction X. Therefore, the stretched holding portion 52d in the holder 52a that holds the conductive members 52b can be made thinner, and the stretched holding portion 52d can be easily passed through the insertion hole 31b.

[0069] The second connection portion 51bc of the busbar 51b and the first connection portion 52bc of the conductive member 52b are both located on the other axial side (-Y side) of the three-phase inverter circuit composed of six switching elements 84 and 85. In this embodiment, the terminals 90a of the connector portion 90, the microcontroller 83, the switching elements 84 and 85, the multiple second connection portions 51bc, and the multiple first connection portions 52bc are arranged in this order from one axial side (+Y side) to the other axial side of the circuit board body 81. Therefore, power supplied from the terminals 90a of the connector portion 90 can be supplied from the busbar 51b to the stator 42 by flowing sequentially from one axial side to the other axial side in the order of the microcontroller 83, the switching elements 84 and 85, and the second connection portion 51bc. As a result, printed wiring provided on the circuit board body 81 can be arranged without crossing, and the wiring pattern of the printed wiring can be simplified. Furthermore, for the multiple first connection points 52bc, for example, the printed wiring on the main board 81 can be passed through both sides of the second connection point 51bc and the switching elements 84 and 85 in the width direction X, thereby connecting them to the microcontroller 83 via the printed wiring. This allows the multiple first connection points 52bc to be connected to the control board 80 at a position close to the axial direction on the sensor board 53, while also being electrically connected to the microcontroller 83 on the control board 80.

[0070] In this embodiment, the thickness of the conductive member 52b is, for example, about 0.5 mm or more and 0.6 mm or less, which is thinner than the bus bar 51b. Therefore, even without providing a curved arc-shaped portion like the bus bar 51b, the stress generated in the conductive member 52b due to its bending can be easily relieved. This suppresses the stress applied to the connection portion between the conductive member 52b and the control board 80. Thus, it is easier to maintain a suitable connection between the conductive member 52b and the control board 80. Note that the conductive member 52b may also be provided with a curved arc-shaped portion, similar to the bus bar 51b.

[0071] The conductive member 52b has a sensor board connection portion 52b3 that is connected to the sensor board 53. The sensor board connection portion 52b3 is connected to the sensor board 53 by passing through the sensor board 53 from one axial side (+Y side) to the other axial side (-Y side). In this embodiment, the sensor board connection portions 52b3 of the five conductive members 52b are soldered to the lower end of the sensor board 53. Each sensor board connection portion 52b3 is arranged at equal intervals in the width direction X. Since the sensor board connection portion 52b3 passes through the sensor board 53 from one axial side to the other axial side, it is exposed to the outside of the housing 30 when the cover portion 33 is not attached. This makes it easier to solder the sensor board connection portion 52b3 to the sensor board 53.

[0072] At least a portion of the conductive member 52b and at least a portion of the busbar 51b overlap each other when viewed from a direction intersecting the axial direction (vertical direction Z). Specifically, one axial end (+Y side) of the axially extended portion 52bb of the conductive member 52b and the other axial end (-Y side) and extension portion 51ba of the axially extended portion 51bb of the busbar 51b partially overlap in the vertical direction Z that intersects the axial direction.

[0073] The sensor substrate 53 is held on the other axial side (-Y side) of the sensor base 52. More specifically, the sensor substrate 53 is held on the other axial side (-Y side) of the substrate holding portion 52c of the holder 52a. More specifically, as shown in Figure 1, a recess 52g is provided in the center of the substrate holding portion 52c, recessed on one axial side (+Y side), and the sensor substrate 53 is held inside this recess 52g. The sensor substrate 53 is positioned on the other axial side of the motor 10 and is arranged along a direction intersecting the axial direction. In this embodiment, the sensor substrate 53 is a rectangular plate shape with its surface perpendicular to the axial direction.

[0074] The sensor board 53 is equipped with a rotation sensor 54 that detects the rotation angle of the rotor 41. The rotation sensor 54 is mounted on one axial side (+Y side) of the sensor board 53. The rotation sensor 54 is exposed on one axial side of the board holding portion 52c through a hole provided at the bottom of the recess 52g. The rotation sensor 54 faces the sensor magnet 46 with an axial gap between them. The rotation sensor 54 is a magnetic sensor capable of detecting the magnetic field of the sensor magnet 46. The rotation sensor 54 can detect the rotation of the rotor 41 by detecting changes in the magnetic field of the sensor magnet 46.

[0075] The pump mechanism 20 is connected to one axial side (+Y side) of the rotor 41. The pump mechanism 20 is housed in a housing recess 36a. The pump mechanism 20 has an inner rotor 21 and an outer rotor 22. The inner rotor 21 is connected to the portion of the shaft 41a that protrudes into the housing recess 36a. In this way, the pump mechanism 20 is connected to the rotor 41. The outer rotor 22 is annular in shape and surrounds the inner rotor 21. The inner rotor 21 and the outer rotor 22 mesh with each other. The outer rotor 22 rotates as the inner rotor 21 is rotated by the shaft 41a.

[0076] In this embodiment, the control board 80 is positioned in an orientation along the axial direction, and the sensor board 53 is positioned on the other axial side (-Y side) of the control board 80 in an orientation that intersects it in the axial direction, resulting in a distance between the control board 80 and the sensor board 53. Therefore, if, for example, a flexible wiring board is used to electrically connect the control board 80 and the sensor board 53, problems may arise such as difficulty in passing the flexible wiring board through the insertion hole 31b of the housing 30, making it difficult to connect the control board 80 and the sensor board 53.

[0077] In contrast, according to this embodiment, the sensor base 52 that holds the sensor substrate 53 on which the rotation sensor 54 is mounted has a holder 52a and a plurality of conductive members 52b. The holder 52a has an extended holder portion 52d that extends toward the control substrate 80. Each of the plurality of conductive members 52b has an exposed portion 52b1 that is exposed from the extended holder portion 52d. The exposed portion 52b1 has an axially extended portion 52bb that extends along the axial direction, and a first connecting portion 52bc that is bent in a direction intersecting the axial direction from one end of the axially extended portion 52bb and connected to the control substrate 80. Therefore, the exposed portion 52b1 of the conductive member 52b can be brought closer to the control substrate 80 via the extended holder portion 52d. Furthermore, because the exposed portion 52b1 has an axially extended portion 52bb, it is easier to bring the exposed portion 52b1 even closer to the control substrate 80 which is located on one axial side (+Y side) relative to the sensor substrate 53. This makes it easier to directly connect the conductive member 52b connected to the sensor board 53 to the control board 80. Therefore, by incorporating the sensor base 52 into the housing 30, the conductive member 52b provided on the sensor base 52 can be easily connected to the control board 80. As a result, the work of connecting the sensor board 53 and the control board 80 can be made easier, improving the ease of assembly of the pump 100. This reduces the man-hours and time required to assemble the pump 100.

[0078] Furthermore, the axial extension portion 52bb allows the axial position of the first connection portion 52bc to be positioned to one side in the axial direction, thus allowing the connection position between the conductive member 52b and the control board 80 to be positioned further to one side in the axial direction than in the conventional design. This eliminates the need to unnecessarily extend the control board 80 to the other side in the axial direction, and allows the control board 80 to be miniaturized in the axial direction.

[0079] In this embodiment, by tilting the sensor base 52, inserting the extension holding portion 52d into the insertion hole 31b provided in the housing 30, and rotating the entire sensor base 52 to position it in the mounting position, the sensor base 52 can be positioned inside the housing 30 while the first connection portion 52bc can reach the control board 80. This allows the exposed portion 52b1 exposed from the extension holding portion 52d to be connected to the control board 80.

[0080] In this embodiment, the bearing holder 70 has a first notch 71f cut out in a direction away from the insertion hole 31b at a position opposite to the insertion hole 31b. Therefore, interference between the sensor base 52 and the bearing holder 70 can be suppressed when inserting a part of the sensor base 52 into the insertion hole 31b. Furthermore, the outer cylinder portion 61 of the cover member 60 has a second notch 61f cut out in a direction away from the insertion hole 31b at a position opposite to the insertion hole 31b. Therefore, interference between the sensor base 52 and the cover member 60 can be suppressed when inserting a part of the sensor base 52 into the insertion hole 31b. In addition, the second notch 61f has an inclined portion 61g on the edge on the other side in the axial direction. Therefore, interference between the sensor base 52 and the cover member 60 can be further suppressed when inserting a part of the sensor base 52 into the insertion hole 31b.

[0081] Furthermore, according to this embodiment, at least a portion of the conductive member 52b and at least a portion of the busbar 51b overlap each other when viewed from a direction intersecting the axial direction. Therefore, the conductive member 52b and the busbar 51b can be positioned in close proximity to each other while avoiding interference between them. Specifically, in this embodiment, by giving the busbar 51b and the conductive member 52b similar bent shapes, the connection positions to the control board 80 can be brought closer to each other while avoiding interference between them. This allows the conductive member 52b and the busbar 51b to be connected to the control board 80 in a space-efficient manner on the control board 80. Moreover, by giving the busbar 51b and the conductive member 52b a bent shape (crank shape) as described above, vibration resistance is improved, and the connection to the control board 80 can be maintained while mitigating external shocks and vibrations from the motor 10. Furthermore, even if the sensor base 52 is located on the other axial side (-Y side: a position away from the sensor base 52) than the bus bar assembly 51, the bent shape of the extension portion 52ba allows it to be connected to the control board 80.

[0082] The shape of the retainer 52a is not limited to the shape described above. In this embodiment, the stretchable retainer 52d has a first portion 52e extending along the axial direction and a second portion 52f extending in a direction intersecting the axial direction, but it may also consist of only the first portion 52e. The length of the stretchable retainer 52d can be changed as appropriate, as long as interference between the conductive member 52b exposed from the stretchable retainer 52d and other members can be avoided when inserting it into the insertion hole 31b of the housing body 31.

[0083] The applications of the rotating electric machine to which the present invention is applied are not particularly limited. The rotating electric machine may be mounted on equipment other than pumps. The applications of a pump equipped with a rotating electric machine are not particularly limited. The type of fluid delivered by the pump is not particularly limited and may be water or the like. The rotating electric machine and pump may be mounted on equipment other than vehicles. The configurations and methods described herein can be combined as appropriate, within the bounds of what is not mutually inconsistent. [Explanation of symbols]

[0084] 10...Motor, 20...Pump mechanism, 30...Housing, 31b...Insertion hole, 41...Rotor, 42...Stator, 42c...Coil, 43a...Bearing, 51...Busbar assembly, 51a...Busbar holder, 51b...Busbar, 52...Sensor base, 52a...Holder, 52b...Conductive member, 52d...Extended holding part, 52e...First part, 52f...Second part, 53...Sensor substrate, 54 ...rotation sensor, 60...cover member, 61...outer cylinder part, 61f...second notch part, 61g...inclined part, 70...bearing holder, 71f...first notch part, 80...control board, 100...pump, 42c1...leader wire, 51b3...coil connection part, 52b3...sensor board connection part, 51bc...second connection part, 52b1...exposed part, 52bb...axial extension part, 52bc...first connection part, J...central axis

Claims

1. A motor having a rotor rotatable around a central axis and a stator facing the rotor with a gap between them, A pump mechanism connected to one axial side of the rotor, A control board located radially outward of the motor and extending along the axial direction, A sensor board equipped with a rotation sensor for detecting the rotation angle of the rotor, A sensor base that holds the aforementioned sensor substrate, A housing that accommodates the motor, the pump mechanism, the control board, the sensor board, and the sensor base, The busbar assembly comprises a busbar having a busbar electrically connected to the stator, The sensor substrate is positioned on the other side of the motor's axial direction and along a direction intersecting the axial direction. The aforementioned sensor base is Multiple conductive members electrically connect the sensor substrate and the control substrate, It has a holder that holds the plurality of conductive members, The holder has an extended holding portion that extends toward the control substrate, Each of the plurality of conductive members has an exposed portion that protrudes from the end of the stretched holding portion that is closer to the control substrate, The exposed portion has an axially extended portion that extends along the axial direction, and a first connecting portion that is bent in a direction intersecting the axial direction from one end of the axially extended portion and connected to the control board. The housing has an insertion hole through which the stretchable holding portion passes, A pump through which the busbar assembly is passed.

2. The pump according to claim 1, wherein the sensor base is located on the other axial side of the bus bar assembly.

3. A bearing that rotatably supports the rotor, A bearing holder that holds the bearing and is positioned opposite to one side of the sensor base in the axial direction, Equipped with, The pump according to claim 2, wherein the bearing holder has a first notch cut out in a direction away from the insertion hole at a position opposite to the insertion hole.

4. A motor having a rotor rotatable about the axis of a central shaft and a stator facing the rotor with a gap between them, A pump mechanism connected to one axial side of the rotor, A control board located radially outward of the motor and extending along the axial direction, A sensor board equipped with a rotation sensor for detecting the rotation angle of the rotor, A sensor base that holds the aforementioned sensor substrate, A housing that accommodates the motor, the pump mechanism, the control board, the sensor board, and the sensor base, A busbar assembly having a busbar electrically connected to the stator, A bearing that rotatably supports the rotor, The system includes a bearing holder that holds the bearing and is positioned opposite to one side of the sensor base in the axial direction, The sensor substrate is positioned on the other side of the motor's axial direction and along a direction intersecting the axial direction. The aforementioned sensor base is Multiple conductive members electrically connect the sensor substrate and the control substrate, It has a holder that holds the plurality of conductive members, and Located on the other axial side of the aforementioned bus bar assembly, The holder has an extended holding portion that extends toward the control substrate, Each of the plurality of conductive members has an exposed portion that is exposed from the stretched holding portion, The exposed portion has an axially extended portion that extends along the axial direction, and a first connecting portion that is bent in a direction intersecting the axial direction from one end of the axially extended portion and connected to the control board. The housing has an insertion hole through which the stretchable holding portion passes, The bearing holder has a first notch cut out in a direction away from the insertion hole, at a position opposite to the insertion hole, in the pump.

5. The bearing holder is provided with a cover member located on one axial side, The bus bar assembly has a bus bar holder that holds the bus bar, The busbar has a coil connection portion that is exposed from the busbar holder and connected to lead wires extending from the stator coil, The cover member has an outer cylindrical portion that covers the coil connection portion from the radially outer side, The pump according to claim 3 or 4, wherein the outer cylinder portion has a second notch cut out at a position opposite to the insertion hole and in a direction away from the insertion hole.

6. The pump according to claim 5, wherein the second notch has an inclined portion on the edge on the other side in the axial direction.

7. The pump according to any one of claims 3 to 6, wherein the bearing holder and the extension holding portion overlap each other in a direction intersecting the axial direction in at least a portion of the area.

8. The pump according to any one of claims 2 to 7, wherein the motor, the busbar assembly, and the sensor base are arranged in this order from one axial side to the other axial side.

9. The busbar has a second connection portion that is connected to the control board, The pump according to any one of claims 2 to 8, wherein the first connection portion is connected to the control board on the other axial side of the second connection portion.

10. The pump according to claim 9, wherein at least a portion of the conductive member and at least a portion of the busbar overlap each other when viewed from a direction intersecting the axial direction.

11. The stretching and holding portion is, A first part extending along the axial direction, It has a second portion that bends from one axial end of the first portion in a direction intersecting the axial direction and extends toward the control board, The pump according to any one of claims 1 to 10, wherein the exposed portion is exposed from the tip surface of the second portion.

12. The sensor substrate is held on the other axial side of the sensor base, The conductive member has a sensor board connection portion that is connected to the sensor board, The sensor substrate connection portion penetrates the sensor substrate from one axial side to the other axial side. The pump according to any one of claims 1 to 11, wherein the first connection portion penetrates the control board from the motor side.

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