pump

Abstract

A pump is provided. The pump includes a motor, a pump mechanism, a control substrate located radially outward of the motor and extending in an axial direction, a sensor substrate on which a rotation sensor that detects a rotation angle of a rotor is mounted, a sensor holder that holds the sensor substrate, and a housing that accommodates the motor, the pump mechanism, the control substrate, the sensor substrate, and the sensor holder. The sensor substrate is disposed on the other side of the motor in the axial direction and is disposed in a direction that intersects the axial direction. The sensor holder has a plurality of conductive members that electrically connect the sensor substrate and the control substrate, and a holding body that holds the plurality of conductive members. The holding body has an extension holding portion that extends toward the control substrate. The plurality of conductive members each have an exposed portion that is exposed from the extension holding portion. The exposed portion has an axial extension portion that extends in the axial direction, and a first connection portion that is bent from an end portion on one side of the axial extension portion in the direction that intersects the axial direction and is connected to the control substrate.

Description

Technical Field

[0001] This invention relates to a pump. Background Technology

[0002] Patent Document 1 discloses a drive device comprising a first substrate (sensor substrate) disposed axially on the motor side, a second substrate (control substrate) disposed axially on the connector side, a switching element mounted on the surface of the first substrate on the motor side, and a rotation sensor disposed on the substrate disposed closest to the motor side and detecting the rotation of the motor.

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent Application No. 2017-189033 Summary of the Invention

[0006] The problem that the invention aims to solve

[0007] However, when the control board is arranged axially separately from the sensor board that carries the rotation sensor, there are problems such as the structure of connecting the circuit board and the control board becoming more complex, and the manpower and time required for assembly increasing.

[0008] In view of the above, one of the objects of the present invention is to provide a pump having a structure that can reduce the labor time and time required for assembly.

[0009] Solution for solving the problem

[0010] One embodiment of the pump of the present invention comprises: a motor having a rotor rotatable about a central axis and a stator opposed to the rotor with a gap; a pump mechanism connected to one axial side of the rotor; a control board located radially outward of the motor and extending axially; a sensor board equipped with a rotation sensor for detecting the rotation angle of the rotor; a sensor base holding the sensor board; and a housing housing the motor, the pump mechanism, the control board, the sensor board, and the sensor base. The sensor board is disposed on the other axial side of the motor and arranged in a direction intersecting the axial direction. The sensor base has: a plurality of conductive members electrically connecting the sensor board to the control board; and a retainer holding the plurality of conductive members. The retainer has an extended retaining portion extending toward the control board. Each of the plurality of conductive members has an exposed portion protruding from the extended retaining portion. The exposed portion has: an axially extending portion extending axially; and a first connecting portion bending from one axial end of the axially extending portion in a direction intersecting the axial direction and connecting to the control board.

[0011] The effects of the invention

[0012] According to one aspect of the present invention, it is possible to provide a pump having a structure that can reduce the labor and time required for assembly. Attached Figure Description

[0013] Figure 1 This is a cross-sectional view showing a portion of the pump according to this embodiment.

[0014] Figure 2 This is an exploded perspective view showing a portion of the pump according to this embodiment.

[0015] Figure 3 This is a perspective view showing a portion of the housing in this embodiment.

[0016] Figure 4 This is a cross-sectional perspective view showing a portion of the pump according to this embodiment.

[0017] Figure 5 This is a cross-sectional view showing a portion of the pump according to this embodiment.

[0018] Figure 6 This is a diagram showing the spring assembly of the pump in this embodiment as viewed from the axial direction from the other side.

[0019] Figure 7 This is a diagram showing the bearing cage of the pump in this embodiment as viewed from the axial side.

[0020] Figure 8 This is a perspective view showing a portion of the pump according to this embodiment.

[0021] Figure 9 This is a diagram showing the pump of this embodiment as viewed from the control board side.

[0022] In the picture:

[0023] 10—Motor, 20—Pump mechanism, 30—Housing, 31b—Insertion hole, 41—Rotor, 42—Stator, 42c—Coil, 43a—Bearing, 51—Busbar assembly, 51a—Busbar retainer, 51b—Busbar, 52—Sensor base, 52a—Retainer, 52b—Conductive component, 52d—Extended retainer, 52e—First part, 52f—Second part, 53—Sensor substrate, 54—Rotational transmission Sensor, 60—Cover component, 61—Outer cylinder, 61f—Second cut, 61g—Inclined portion, 70—Bearing cage, 71f—First cut, 80—Control board, 100—Pump, 42c1—Lead wire, 51b3—Coil connection, 52b3—Sensor board connection, 51bc—Second connection, 52b1—Exposed portion, 52bb—Axial extension, 52bc—First connection, J—Central shaft. Detailed Implementation

[0024] In the following description, the X-axis, Y-axis, and Z-axis are appropriately represented in the figures. The Y-axis represents the direction in which the central shaft J of the motor in the pump of the embodiment described below extends. The central shaft J shown in each figure is an imaginary axis. In the following description, the direction in which the central shaft 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 shaft J is simply referred to as the "radial direction". The circumferential direction centered on the central shaft J is simply referred to as the "circumferential direction". The side in the axial direction where the arrow of the Y-axis points (+Y side) is referred to as the "axial side". The side in the axial direction opposite to the side in the Y-axis direction (-Y side) is referred to as the "axial side".

[0025] The circumferential direction is represented by arrow θ in each diagram. The side in the circumferential direction that arrow θ points towards is called the "circumferential side one." The side in the circumferential direction opposite to the side in the direction arrow θ points towards is called the "circumferential side other." The circumferential side one is the side that advances clockwise around the central axis J when viewed from the axial side (+Y side). The circumferential side other is the side that advances counterclockwise around the central axis J when viewed from the axial side.

[0026] The direction parallel to the Z-axis is called the "vertical Z-direction". The side of the vertical Z-direction where the arrow points (+Z side) is called the "upper side". The side of the vertical Z-direction opposite to the side of the arrow pointing to the Z-axis (-Z side) is called the "lower side". The direction parallel to the X-axis is called the "width X-direction". The side of the width X-direction where the arrow points (+X side) is called the "width direction side one". The side of the width X-direction opposite to the side of the arrow pointing to the X-axis (-X side) is called the "width direction side the other". The axial direction, the vertical Z-direction, and the width X-direction are mutually orthogonal.

[0027] Furthermore, the vertical direction Z, the width direction X, the upper side and the lower side are merely names used to describe the configuration relationships of each part, etc. The actual configuration relationships can also be configuration relationships other than those represented by these names.

[0028] Figure 1 and Figure 2 The pump 100 shown in this embodiment is an electric pump installed in equipment mounted on a vehicle. The equipment on which the pump 100 is installed can be an automatic transmission or a drive unit that drives the axle of the vehicle. The pump 100 is, for example, an electric oil pump that supplies oil to equipment mounted on the vehicle.

[0029] like Figure 1 As shown, the pump 100 includes a motor 10, a pump mechanism 20, a housing 30, a manifold assembly 51, a sensor base 52, a sensor substrate 53, a cover component 60, a spring component 64, a bearing cage 70, a control substrate 80, and bearings 43a and 43b. The motor 10 has a rotor 41 and a stator 42.

[0030] Rotor 41 is rotatable about a central axis J extending axially. Rotor 41 has a shaft 41a and a rotor body 41b. Shaft 41a is cylindrical, extending axially around the central axis J. Shaft 41a is supported by bearings 43a and 43b to enable rotation about the central axis J. That is, bearings 43a and 43b support rotor 41 to enable rotation. In this embodiment, bearings 43a and 43b are rolling bearings. Bearings 43a and 43b are ball bearings. Bearing 43a supports the portion of shaft 41a located on the axially opposite side (-Y side) of the rotor body 41b to enable rotation. Bearing 43b supports the portion of shaft 41a located on the axially opposite side (+Y side) of the rotor body 41b to enable rotation. Rotor body 41b is fixed to the outer circumferential surface of shaft 41a. Although not shown in the figure, rotor body 41b has a rotor core and rotor magnets.

[0031] The stator 42 is positioned opposite the rotor 41 across a gap. The stator 42 is located radially outward from the rotor 41. The stator 42 has a stator core 42a, an insulator 42b, and a plurality of coils 42c. The stator core 42a has a cylindrical core back 42d centered on the central axis J, and a plurality of teeth 42e extending radially inward from the core back 42d. The plurality of coils 42c are mounted on each of the plurality of teeth 42e via the insulator 42b.

[0032] The housing 30 internally houses a motor 10, a pump mechanism 20, a busbar assembly 51, a sensor base 52, a sensor substrate 53, a cover component 60, a spring component 64, a bearing retainer 70, and a control board 80. The housing 30 has a main body 31, a substrate cover 32, a cover 33, and a pump cover 34. The main body 31, substrate cover 32, cover 33, and pump cover 34 are distinct components. The substrate cover 32 is fixed to the lower side of the main body 31. The cover 33 is fixed to the opposite axial side (-Y side) of the main body 31. The pump cover 34 is fixed to one axial side (+Y side) of the main body 31.

[0033] The main body 31 includes a motor housing 35, a pump housing 36, a base plate housing 37a, and a mounting portion 37b. In this embodiment, the motor housing 35, the pump housing 36, the base plate housing 37a, and the mounting portion 37b are part of a single identical component.

[0034] In this embodiment, the motor housing 35 is a cylindrical shape extending axially. The end of the motor housing 35 on the other axial side (-Y side) is the end of the housing body 31 on the other axial side, and is an opening 35a that opens to the other axial side. That is, the housing body 31 has an opening 35a that opens to the other axial side. The opening 35a is closed by a cover 33.

[0035] The motor housing 35 has a cylindrical motor housing body 35b extending axially, an annular fixing portion 39 protruding radially outward from the end of the motor housing body 35b on the other axial side (-Y side), and a frame-like portion 38 protruding axially from the radial outer edge of the fixing portion 39 on the other axial side. The motor housing body 35b is cylindrical about the central axis J. The motor housing body 35b houses the rotor 41 and the stator 42 inside. Thus, the housing body 31 houses the rotor 41 and the stator 42 inside.

[0036] 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 end of the frame-shaped portion 38 on the other axial side is the end of the motor housing 35 on the other axial side, and is an opening 35a. That is, the opening 35a is provided on the frame-shaped portion 38. Figure 2 As shown, 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 outer than the inner circumferential surface of the motor housing body 35b.

[0037] The frame-shaped portion 38 has a plurality of first screw fixing portions 38r. Each of the plurality of first screw fixing portions 38r has an internally threaded hole 38n recessed from the axial side (-Y side) of the frame-shaped portion 38 towards the axial side (+Y side). For example... Figure 2 As shown, the cover portion 33 is fixed to each of the first screw fixing portions 38r by screws 94. The screws 94 pass through the through holes 33b provided on the cover portion 33 from the other axial side and are screwed into the internal threaded holes 38n. Thus, the cover portion 33 is fixed to the frame-shaped portion 38. Figure 2 and Figure 3 As shown, in this embodiment, a plurality of first screw fixing portions 38r are arranged at intervals along the circumferential direction.

[0038] The fixed part 39 is the part that fixes the bearing cage 70. For example... Figure 3 As shown, the fixed portion 39 has a surface facing the other axial side (-Y side) and is annular, surrounding the central axis J. The radially inner edge of the fixed portion 39 is circular, centered on the central axis J. The radially outer edge of the fixed portion 39 is connected to the radially inner surface of the frame-like portion 38. The fixed portion 39 protrudes radially inward from the radially inner surface of the frame-like portion 38. The fixed portion 39 is located further away from the axial side (+Y side) than the end face of the frame-like portion 38 on the other axial side.

[0039] The fixed portion 39 has a plurality of second screw fixing portions 39r. Each of the plurality of second screw fixing portions 39r has an internally threaded hole 39e recessed from the other axial side (-Y side) of the fixed portion 39 towards the axial side (+Y side). For example... Figure 2 As shown, the bearing cage 70 is fixed to each of the second screw fixing portions 39r by screws 92. The screws 92 pass through the through holes 72e provided on the bearing cage 70 from the other axial side and are screwed into the internal threaded holes 39e. Thus, the bearing cage 70 is fixed to the fixing portion 39. In this embodiment, the plurality of second screw fixing portions 39r are arranged circumferentially spaced apart from each other.

[0040] like Figure 1 As shown, the pump housing 36 is connected to the motor housing 35 on one axial side (+Y side). The pump housing 36 has a receiving recess 36a consisting of a recess with an opening on one axial side. The opening on one axial side of the receiving recess 36a is closed by the pump cover 34.

[0041] The substrate housing 37a is located below the motor housing 35 and the pump housing 36. The substrate housing 37a extends axially. The end of the substrate housing 37a on one axial side (+Y side) protrudes further axially than the pump housing 36 and the pump cover 34. A connector portion 90 is provided at the end of the substrate housing 37a on one axial side. The substrate housing 37a has a receiving recess 37c formed by a recess with a downward opening. The lower opening of the receiving recess 37c is blocked by the substrate cover 32. The control substrate 80 is held inside the receiving recess 37c.

[0042] Mounting part 37b is located on one side (+X side) of the motor housing 35 and the pump housing 36 in the width direction. Mounting part 37b is the part that is fixed to the equipment of the vehicle by screws.

[0043] The housing body 31 has a through hole 31a that axially connects the interior of the motor housing 35 and the interior of the receiving recess 36a. An oil seal 44 is held in the through hole 31a to seal between the inner circumferential surface of the through hole 31a and the outer circumferential surface of the shaft 41a. A bearing 43b is held in the through hole 31a on the other axial side (-Y side) of the oil seal 44.

[0044] like Figure 3 As shown, the housing body 31 has an insertion hole 31b that radially connects the interior of the motor housing 35 and the interior of the receiving recess 37c. That is, the housing 30 has an insertion hole 31b. The insertion hole 31b is located on the axial side of the housing body 31 and penetrates the wall between the interior of the motor housing 35 and the interior of the receiving recess 37c in the vertical direction Z. The insertion hole 31b is a longer hole in the direction intersecting the axial direction (X-axis direction).

[0045] like Figure 2 As shown, the cover portion 33, viewed along the axial direction, is a roughly square shape with rounded corners. The axial shape of the cover portion 33 is the same as that of the frame-like portion 38. The cover portion 33 has multiple third screw fixing portions 33a at its radial outer edge. Each of the multiple third screw fixing portions 33a has a through hole 33b extending axially through the cover portion 33. Each third screw fixing portion 33a is fixed to each first screw fixing portion 38r by a screw 94 passing through the through hole 33b from the opposite axial side (-Y side). A vent 91 is installed on the cover portion 33.

[0046] like Figure 4 As shown, the cover member 60 is located inside the motor housing body 35b on the opposite axial side (-Y side) of the stator 42. The cover member 60 is located on the axial side (+Y side) of the bearing cage 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.

[0047] The outer cylinder 61 is cylindrical and surrounds the central shaft J. The outer cylinder 61 opens to one axial side (+Y side). The outer cylinder 61 fits inside the motor housing body 35b. The axial end of the outer cylinder 61 (+Y side) surrounds the insulator 42b and the portion of the coil 42c that protrudes further to the other axial side (-Y side) than the stator core 42a.

[0048] like Figure 5As shown, the outer cylinder portion 61 has a second cut portion 61f, formed by cutting in a direction away from the insertion hole 31b, located radially opposite to the insertion hole 31b of the housing 30. The second cut portion 61f is provided at the center of the lower portion on the opposite axial side (-Y side) of the outer cylinder portion 61 in the width direction X. The second cut portion 61f is located above the insertion hole 31b. The lower surface of the second cut portion 61f is a flat surface orthogonal to the vertical direction Z. The edge of the second cut portion 61f on the opposite axial side has an inclined portion 61g. The inclined portion 61g extends along the width direction X. The inclined portion 61g is inclined in a direction located on the axial side (+Y side) as it moves radially outward. For example, the inclined portion 61g is formed by chamfering the edge of the second cut portion 61f on the opposite axial side by C. Alternatively, the inclined portion 61g can be formed by chamfering the edge of the second cut portion 61f on the opposite axial side by R.

[0049] like Figure 4 As shown, the inner cylinder 63 is cylindrical, surrounding the central axis J. The inner cylinder 63 has openings on both axial sides. The inner cylinder 63 is located radially inside the outer cylinder 61. The end of the inner cylinder 63 on one axial side (+Y side) is located on the other axial side (-Y side) compared to the end of the outer cylinder 61 on one axial side.

[0050] The connecting portion 62 connects the end of the outer cylinder portion 61 on the other axial side (-Y side) and the end of the inner cylinder portion 63 on the other axial side. The connecting portion 62 is annular, surrounding the central shaft J. The connecting portion 62 is located slightly closer to the axial side (+Y side) than the end of the outer cylinder portion 61 on the other axial side. Figure 4 As shown, the connecting portion 62 has a surface 62a facing the opposite side of the axial direction. Surface 62a is axially opposed to the bearing cage 70. Surface 62a is annular in shape surrounding the central shaft J. Surface 62a is a flat surface orthogonal to the axial direction.

[0051] like Figure 1 As shown, the spring component 64 is located on the opposite axial side (-Y side) of the cover component 60. The spring component 64 is disposed on the surface 62a of the connecting portion 62. The spring component 64 is fixed to the surface 62a by welding. Figure 6 As shown, the spring component 64 has an annular body portion 64a surrounding the central shaft J and three spring plates 64b extending from the body portion 64a.

[0052] The main body 64a is fixed to the surface 62a. The main body 64a has three protrusions 64a1 extending radially outward and three concave cutouts 64a2 facing radially inward. These protrusions 64a1 and cutouts 64a2 exist alternately around the central axis J. In this embodiment, the spring member 64 is arranged with one of the three cutouts 64a2 facing the control substrate 80 side (-Z side). When viewed axially, the cutout 64a2 facing the control substrate 80 side is located above the second cutout 61f and extends along the second cutout 61f in the width direction X.

[0053] Three spring plates 64b are arranged at equal intervals in the circumferential direction. The three spring plates 64b extend circumferentially along the outer periphery of the inner cylinder portion 63. The spring plates 64b are located radially inside the protrusion 64a1 of the main body portion 64a. The base end 64b1 of the spring plate 64b is connected to the main body portion 64a, and the front end 64b2 is a free end. The spring plate 64b has a shape that bends towards the opposite axial direction (-Y side) as it approaches the front end 64b2.

[0054] like Figure 4 As shown, the spring component 64 is disposed between the cover component 60 and the bearing cage 70. When the bearing cage 70 is installed into the housing 30, each spring plate 64b of the spring component 64 is pushed from the other axial side to one axial side (+Y side) by the bearing cage 70 and elastically deforms towards that axial side. Thus, the spring component 64 exists between the cover component 60 and the bearing cage 70 in a state of elastic deformation of each spring plate 64b. In this state, since the elastic restoring force of the spring plates 64b acts axially to push the cover component 60 towards one axial side, it is possible to suppress the axial displacement of the cover component 60.

[0055] Furthermore, in this embodiment, by providing three slits 64a2 in the circumferential direction of the spring member 64, the installation freedom of the spring member 64 relative to the cover member 60 is increased, making assembly easier. Additionally, since the three spring plates 64b are evenly arranged in the circumferential direction, the cover member 60 can be stably pressed axially using the three spring plates 64b.

[0056] The bearing cage 70 is a component that holds the bearing 43a. The bearing cage 70 is located inside the motor housing body 35b on the opposite axial side (-Y side) of the cover component 60. The bearing cage 70 is configured opposite to the sensor base 52 on the axial side (+Y side). Figure 2 and Figure 7As shown, the bearing cage 70 has a cage body portion 71 and multiple protrusions 72. The cage body portion 71 has a retaining sleeve portion 71a and a flange portion 71b. The retaining sleeve portion 71a is cylindrical, surrounding the central shaft J. The retaining sleeve portion 71a is open on both axial sides. Figure 1 As shown, the retaining cylinder 71a is inserted into the inner cylinder 63 from the other axial side (-Y side). In this embodiment, the retaining cylinder 71a is fitted into the inner cylinder 63. The end of the retaining cylinder 71a on the other axial side (-Y side) is located further on the other axial side than the inner cylinder 63.

[0057] At the axial center of the inner circumferential surface of the retaining cylinder 71a, an annular wall portion 71c protruding radially inward is provided. The annular wall portion 71c is annular in shape surrounding the central shaft J. A bearing 43a is fitted and held in the portion of the retaining cylinder 71a located further axially than the annular wall portion 71c (+Y side). Thus, the retainer body 71 holds the bearing 43a. On the inner circumferential surface of the portion of the retaining cylinder 71a located further axially than the annular wall portion 71c (-Y side), a rib 71d protruding radially inward is provided. The rib 71d extends axially. Multiple ribs 71d are spaced apart circumferentially.

[0058] The portion of shaft 41a on the other axial side (-Y side) passes through the interior of retaining sleeve 71a. The end of shaft 41a on the other axial side is located inside the portion of retaining sleeve 71a that is further inside the other axial side than the annular wall portion 71c. A sensor magnet 46 is mounted at the end of shaft 41a on the other axial side via mounting member 45. Mounting member 45 and sensor magnet 46 are located inside the portion of retaining sleeve 71a that is further inside the other axial side than the annular wall portion 71c.

[0059] The flange portion 71b protrudes radially outward from the end of the retaining cylinder portion 71a on the opposite axial side (-Y side). For example... Figure 2 and Figure 7 As shown, the flange portion 71b is annular in shape surrounding the central shaft J. A first cutout portion 71f, extending axially through the flange portion 71b, is provided at the center of the lower portion of the flange portion 71b in the width direction X. The first cutout portion 71f opens downwards. The first cutout portion 71f is located radially opposite the insertion hole 31b of the housing 30 and is cut in a direction away from the insertion hole 31b. That is, the bearing cage 70 has a first cutout portion 71f formed by a cut in a direction away from the insertion hole 31b at a position opposite to the insertion hole 31b. The first cutout portion 71f is a concave portion formed by a cut from the outer periphery of the flange portion 71b toward the radially inward direction.

[0060] An internally threaded hole 71e is provided in the flange portion 71b, recessed from the axial side (-Y side) of the flange portion 71b towards the axial side (+Y side). The internally threaded hole 71e extends through the flange portion 71b axially, for example. A plurality of internally threaded holes 71e are provided at equal intervals along the circumference. In this embodiment, four internally threaded holes 71e are provided.

[0061] like Figure 1 As shown, the flange portion 71b is disposed opposite to 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 end of the flange portion 71b on the axial side (+Y side) is fitted into the radially inner side of the fixed portion 39. The flange portion 71b is disposed within the end of the motor housing body 35b on the other axial side (-Y side), substantially blocking that end.

[0062] like Figure 2 As shown, multiple protrusions 72 protrude radially outward from the cage body portion 71. In this embodiment, the multiple protrusions 72 protrude radially outward from the radially outer edge of the flange portion 71b. The radially outer portion of the protrusion 72 is recessed further axially to one side (+Y side) than the radially inner portion of the protrusion 72. A through hole 72e is provided in the radially outer portion of the protrusion 72, extending through the protrusion 72 axially. A stepped portion 72f is provided between the radially outer portion and the radially inner portion of the protrusion 72. When viewed axially, the stepped portion 72f is an arc shape centered on the through hole 72e.

[0063] Multiple protrusions 72 are provided at intervals in the circumferential direction. There are four protrusions 72: protrusion 72a, protrusion 72b, protrusion 72c, and protrusion 72d. Protrusion 72a protrudes obliquely upwards towards one side (+X side) in the width direction. Protrusion 72b protrudes obliquely downwards towards one side in the width direction. Protrusion 72c protrudes obliquely downwards towards the other side (-X side) in the width direction. Protrusion 72d protrudes obliquely upwards towards the other side in the width direction.

[0064] Multiple protrusions 72 are respectively fixed to multiple second screw fixing portions 39r by screws 92. The screws 92 pass through the through holes 72e from the other axial side (-Y side) and are screwed into the internal threaded holes 39e. Thus, the bearing cage 70 is fixed to the housing 30. The axial side (+Y side) surface of the protrusion 72 contacts the axial side surface of the second screw fixing portion 39r. The axial side surface of the protrusion 72 is located further axially than the axial side surface of the portion other than the second screw fixing portion 39r in the fixed portion 39, and is also located further axially than the axial side surface of the frame portion 38.

[0065] like Figure 7As shown, protrusion 72a is fixed to the second screw fixing part 39a by screw 92. Protrusion 72b is fixed to the second screw fixing part 39b by screw 92. Protrusion 72c is fixed to the second screw fixing part 39c by screw 92. Protrusion 72d is fixed to the second screw fixing part 39d by screw 92.

[0066] The circumferential dimension of the protrusion 72 decreases as it moves radially outward. When viewed axially, the radially outer edge of the protrusion 72 is an arc shape protruding radially outward. The edge 72g on one circumferential side (+θ side) of the protrusion 72 extends in a straight line in a direction inclined circumferentially relative to the radial direction. The edge 72g is located on the other circumferential side (-θ side) as it moves radially outward. The edge 72h on the other circumferential side (-θ side) of the protrusion 72 extends in a straight line in a direction inclined circumferentially relative to the radial direction. The edge 72h is located on one circumferential side (+θ side) as it moves radially outward. The edges 72g and 72h approach each other as they move radially outward. The circumferential inclination of the edge 72g relative to the radial direction is smaller than the circumferential inclination of the edge 72h relative to the radial direction.

[0067] The edge 72g of the protrusion 72 is disposed opposite to the edge 39g of the second screw fixing part 39r. The edge 72g of the protrusion 72 and the edge 39g of the second screw fixing part 39r extend parallel to each other. The edge 72h of the protrusion 72 is disposed opposite to the edge 39h of the second screw fixing part 39r. The edge 72h of the protrusion 72 and the edge 39h of the second screw fixing part 39r extend parallel to each other.

[0068] Each protrusion 72 is arranged circumferentially opposite to the inner side 38p of each first screw fixing part 38r. The portion of the protrusion 72 that faces the inner side 38p in the circumferential direction is shaped along the circumferential side surface of the inner side 38p. In this embodiment, the portion of the protrusion 72 that faces the inner side 38p in the circumferential direction is the edge 72g. The circumferential side surface of the inner side 38p is part of the arc-shaped inner edge of the inner side 38p. In this embodiment, when viewed axially, the edge 72g extends along a tangent line that is tangent to the portion of the inner side 38p closest to the protrusion 72.

[0069] like Figure 1 As shown, the control board 80 is located radially outward of the motor 10. The control board 80 extends axially. The control board 80 has a board body 81 extending axially with its surface facing the vertical direction Z, and a plurality of electronic components 82 mounted on the board body 81. Figure 8 and Figure 9As shown, the electronic component 82 is equipped with a microcomputer 83 and multiple switching elements 84 and 85. The microcomputer 83 is disposed approximately near the center in both the width direction X and the axial direction on the lower surface of the substrate body 81. The multiple switching elements 84 and 85 are transistors. The multiple switching elements 84 and 85 are arranged at intervals on the opposite side (-Y side) of the axial direction, more distant than the microcomputer 83. Three of each of the switching elements 84 and 85 are provided. The three switching elements 84 are arranged at equal intervals in the width direction X. The three switching elements 85 are respectively arranged adjacent to each other on the opposite side of the three switching elements 84 in the axial direction, and are arranged at equal intervals 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 portion 90 are connected to the end of the control substrate 80 on one side (+Y side) of the axial direction.

[0070] like Figure 1 As shown, the busbar assembly 51 passes through the insertion hole 31b in the vertical direction Z and is disposed across the interior of the motor housing 35 and the receiving recess 37c. The busbar assembly 51 includes a resin busbar holder 51a and a plurality of busbars 51b held on the busbar holder 51a. The busbar holder 51a is disposed radially outward of the bearing holder 70 and 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 to the control board 80. In this embodiment, there are three busbars 51b.

[0071] like Figure 4 , Figure 5 and Figure 8 As shown, a portion of each of the plurality of busbars 51b is embedded in a busbar holder 51a and held therein. Each busbar 51b has a coil connection portion 51b3 exposed from the busbar holder 51a. The coil connection portion 51b3 is the portion that connects to a lead wire 42c1 extending from a coil 42c of the stator 42. The lead wire 42c1 extends from the coil 42c toward the other side (-Y side) axially. By connecting to the coil 42c via the coil connection portion 51b3, the busbar 51b is electrically connected 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 radially outward by the outer cylinder portion 61 of the cover member 60.

[0072] The busbar 51b has an exposed portion 51b1 protruding from the busbar holder 51a. The exposed portion 51b1 is formed in a curved shape (crank shape), which has an extension portion 51ba extending substantially vertically downward (in the -Z direction) from the lower end of the busbar holder 51a, an axial extension portion 51bb extending axially from the lower end of the extension portion 51ba toward one axial side (+Y side), and a second connecting portion 51bc extending substantially vertically downward (in the -Z direction) from the end of the axial extension portion 51bb on one axial side (+Y side). That is, the busbar 51b has a second connecting portion 51bc.

[0073] In this embodiment, the end of the axially extended portion 51bb on one axial side (+Y side) is a semi-circular arc shape bent upwards (+Z direction). The exposed portion 51b1 of the busbar 51b has a relatively large plate thickness, for example, approximately 0.8 mm to 1.0 mm. Therefore, by providing a curved arc-shaped portion on the busbar 51b, it is made easy to flex, thereby easily releasing the stress generated on the busbar 51b using this arc-shaped portion, and suppressing stress applied to the connection between the busbar 51b and the control substrate 80. Therefore, the connection between the busbar 51b and the control substrate 80 can be easily and appropriately maintained.

[0074] The second connecting portion 51bc is connected to the control substrate 80. The second connecting portion 51bc extends through the substrate body 81 from top to bottom in the thickness direction. The second connecting portion 51bc is electrically connected to the substrate body 81, for example, by soldering. In this embodiment, the second connecting portions 51bc of the three busbars 51b are arranged in a straight line at intervals in the width direction X. The second connecting portions 51bc protrude downward from the substrate body 81 and are exposed to the outside of the housing 30 through the opening on the lower side of the receiving recess 37c when the substrate cover 32 is not installed. Therefore, it is easy to solder the second connecting portion 51bc to the control substrate 80.

[0075] like Figure 2 As shown, the sensor base 52 is located on the opposite side (-Y side) of the bearing cage 70 in the axial direction. The sensor base 52 is located axially between the bearing cage 70 and the cover 33. The sensor base 52 is located further on the opposite side of the axial direction than the busbar assembly 51. In this embodiment, the motor 10, the busbar assembly 51, and the sensor base 52 are arranged sequentially from one side (+Y side) towards the other side of the axial direction. As a result, the busbar assembly 51, which connects the motor 10 and the control board 80, can be arranged near the motor 10.

[0076] The sensor base 52 is a component that holds the sensor substrate 53. The sensor base 52 has a resin-made retainer 52a and a plurality of conductive components 52b held on the retainer 52a. The retainer 52a holds the plurality of conductive components 52b. The retainer 52a has a substrate holding portion 52c and an extended holding portion 52d.

[0077] When viewed axially, the substrate holding portion 52c is approximately circular. The substrate holding portion 52c is secured to the bearing retainer 70 by screws 93. The screws 93 pass through a through hole in the substrate holding portion 52c from the opposite axial side (-Y side) and are screwed into the internally threaded hole 71e. Figure 1 As shown, the substrate holding portion 52c is disposed opposite to the bearing holder 70 on the axially opposite side. In addition, the substrate holding portion 52c is located on the axially opposite side (-Y side) further than the busbar assembly 51.

[0078] The extension holding portion 52d extends toward the control substrate 80. More specifically, the extension holding portion 52d extends from the lower end of the substrate holding portion 52c toward the control substrate 80. The extension holding portion 52d passes through the insertion hole 31b. The shape of the extension holding portion 52d matches the insertion hole 31b of the housing body portion 31, and it has a flat shape with a wider width in the direction intersecting the axial direction (width direction X). In this embodiment, five conductive members 52b are held at approximately equal intervals in the width direction X of the extension holding portion 52d.

[0079] The extension holding portion 52d has: a first portion 52e extending axially from the lower end of the substrate holding portion 52c toward one axial side (+Y side); and a second portion 52f extending toward the control substrate 80 from the axial end of the first portion 52e in a direction intersecting the axial direction. A portion of the first portion 52e passes, for example, axially through a first cutout 71f provided on 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.

[0080] In this embodiment, the bearing cage 70 and the extended retaining portion 52d overlap each other at least partially in a direction intersecting the axial direction. In this embodiment, the extended retaining portion 52d is located below the bearing cage 70. That is, the bearing cage 70 and the extended retaining portion 52d overlap each other in the vertical direction Z.

[0081] Multiple conductive components 52b are elongated, plate-shaped components made of metal. A portion of the multiple conductive components 52b is embedded in and held in the holder 52a. The multiple conductive components 52b protrude from the lower end of the second portion 52f and are connected to the control substrate 80. The multiple conductive components 52b electrically connect the sensor substrate 53 to the control substrate 80.

[0082] Each of the multiple conductive components 52b has an exposed portion 52b1 that protrudes from the extended holding portion 52d. In this embodiment, the exposed portion 52b1 protrudes from the front end face (lower end face) of the second portion 52f in the extended holding portion 52d. The exposed portion 52b1 has: an extended portion 52ba that extends vertically downward (in the -Z direction) from the lower end face (front end face) of the second portion 52f; an axially extending portion 52bb that extends axially (in the Y direction) from the lower end of the extended portion 52ba toward one axial side (+Y side); and a first connecting portion 52bc that bends from the end of the axially extending portion 52bb on one axial side (+Y side) in a direction intersecting the axial direction and is connected to the control substrate 80.

[0083] like Figure 8 As shown, the first connecting portion 52bc extends through the control substrate 80 from the motor 10 side. In other words, the first connecting portion 52bc extends through the control substrate 80 in a direction away from the motor 10. The first connecting portion 52bc extends through the substrate body 81 from the upper side to the lower side. The first connecting portion 52bc is electrically connected to the substrate body 81, for example, by soldering. In this embodiment, the first connecting portions 52bc of the five conductive components 52b are arranged in a straight line at intervals in the width direction X. The first connecting portion 52bc extends through the control substrate 80 from the motor 10 side, thereby protruding downward from the control substrate 80. Therefore, the first connecting portion 52bc is exposed to the outside of the housing 30 through the opening on the lower side of the receiving recess 37c when the substrate cover 32 is not installed. This facilitates the soldering of the first connecting portion 52bc onto the control substrate 80.

[0084] The first connecting portion 52bc is connected to the control board 80 on the opposite side (-Y side) of the axial direction, which is further away from the second connecting portion 51bc of the busbar 51b. Since the connection positions of the sensor base 52 and the busbar assembly 51 relative to the control board 80 can be separated axially, the assembly time and labor required can be reduced.

[0085] Furthermore, the five first connecting portions 52bc are arranged parallel to the column of the three second connecting portions 51bc on the opposite side (-Y) of the axial direction compared to the second connecting portions 51bc. In this embodiment, the five conductive members 52b do not intersect the width direction X, but are arranged at equal intervals in the width direction X. Therefore, it is easy to make the extended holding portion 52d in the holding body 52a that holds the conductive member 52b thinner, and it is easy for the extended holding portion 52d to pass through the insertion hole 31b.

[0086] The second connection portion 51bc of the busbar 51b and the first connection portion 52bc of the conductive component 52b are both positioned further along the axial direction (-Y side) than the three-phase inverter circuit composed of six switching elements 84 and 85. In this embodiment, from one axial direction (+Y side) of the substrate body 81 toward the other axial direction, the terminals 90a of the connector portion 90, the microcomputer 83, the switching elements 84 and 85, a plurality of second connection portions 51bc, and a plurality of first connection portions 52bc are arranged sequentially. Therefore, the power supplied from the terminals 90a of the connector portion 90 can flow sequentially from one axial direction to the other axial direction through the microcomputer 83, the switching elements 84 and 85, and the second connection portions 51bc, and be supplied to the stator 42 from the busbar 51b. Therefore, it is easy to arrange the printed wiring on the substrate body 81 without crossing, and the wiring pattern of the printed wiring can be simplified. Furthermore, regarding the plurality of first connection portions 52bc, for example, by having printed wiring on the substrate body 81 pass through the second connection portions 51bc and both sides of the switching elements 84, 85 in the width direction X, it is possible to connect to the microcomputer 83 via the printed wiring. Thus, the plurality of first connection portions 52bc can be connected to the control substrate 80 at a position axially close to the sensor substrate 53, and electrically connected to the microcomputer 83 on the control substrate 80.

[0087] 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 that of the busbar 51b. Therefore, even without the curved arc-shaped portion provided like that of the busbar 51b, it is easy to release the stress generated in the conductive member 52b due to bending. As a result, stress applied to the connection portion between the conductive member 52b and the control substrate 80 can be suppressed. Therefore, it is easy to maintain the connection between the conductive member 52b and the control substrate 80 appropriately. Alternatively, the conductive member 52b may also have a curved arc-shaped portion similar to that of the busbar 51b.

[0088] The conductive component 52b has a sensor substrate connection portion 52b3 that connects to the sensor substrate 53. The sensor substrate connection portion 52b3 extends through the sensor substrate 53 from one axial side (+Y side) to the other axial side (-Y side) and is connected to the sensor substrate 53. In this embodiment, the sensor substrate connection portions 52b3 of the five conductive components 52b are connected to the lower end of the sensor substrate 53 by welding. The sensor substrate connection portions 52b3 are arranged at equal intervals in the width direction X. Since the sensor substrate connection portions 52b3 extend through the sensor substrate 53 from one axial side to the other axial side, they are exposed to the outside of the housing 30 when the cover 33 is not installed. This facilitates the welding of the sensor substrate connection portions 52b3 onto the sensor substrate 53.

[0089] When viewed from a direction intersecting the axial direction (vertical direction Z), at least a portion of the conductive member 52b overlaps with at least a portion of the busbar 51b. Specifically, the end of the axial extension 52bb on one axial side (+Y side) of the conductive member 52b partially overlaps with the end of the axial extension 51bb on the other axial side (-Y side) of the busbar 51b and the extension 51ba in the vertical direction Z intersecting the axial direction.

[0090] The sensor substrate 53 is held on the opposite axial side (-Y side) of the sensor base 52. More specifically, the sensor substrate 53 is held on the opposite axial side (-Y side) of the substrate holding portion 52c of the holding body 52a. More specifically, as... Figure 1 As shown, a recess 52g is provided in the center of the substrate holding portion 52c, recessed towards one axial direction (+Y side), and the sensor substrate 53 is held inside the recess 52g. The sensor substrate 53 is disposed on the other axial side of the motor 10 and is arranged in a direction intersecting the axial direction. In this embodiment, the sensor substrate 53 is a rectangular plate orthogonal to the axial direction with its plate surface facing the axial direction.

[0091] A rotation sensor 54 for detecting the rotation angle of the rotor 41 is mounted on a sensor substrate 53. The rotation sensor 54 is mounted on the surface of the sensor substrate 53 on one axial side (+Y side). The rotation sensor 54 is exposed on one axial side of the substrate holding portion 52c through a hole provided at the bottom of the recess 52g. The rotation sensor 54 and the sensor magnet 46 are axially spaced apart and face each other. The rotation sensor 54 is a magnetic sensor capable of detecting the magnetic field of the sensor magnet 46. By detecting changes in the magnetic field of the sensor magnet 46, the rotation sensor 54 can detect the rotation of the rotor 41.

[0092] Pump mechanism 20 is connected to one axial side (+Y side) of rotor 41. Pump mechanism 20 is housed within housing recess 36a. Pump mechanism 20 has an inner rotor 21 and an outer rotor 22. Inner rotor 21 is connected to a portion of shaft 41a that protrudes into housing recess 36a. Thus, pump mechanism 20 is connected to rotor 41. Outer rotor 22 is annular, surrounding inner rotor 21. Inner rotor 21 and outer rotor 22 mesh with each other. Rotation of inner rotor 21 via shaft 41a causes outer rotor 22 to rotate as well.

[0093] In this embodiment, the control board 80 is arranged in an axial orientation, and the sensor board 53 is arranged in an orientation that intersects the axial direction on the opposite side (-Y side) of the axial direction, thus creating a distance between the control board 80 and the sensor board 53. Therefore, if 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.

[0094] 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 holding body 52a and a plurality of conductive members 52b. The holding body 52a has an extended holding portion 52d that extends toward the control substrate 80. The plurality of conductive members 52b each has an exposed portion 52b1 that protrudes from the extended holding portion 52d. The exposed portion 52b1 has an axially extending portion 52bb that extends along the axial direction, and a first connecting portion 52bc that bends from one axial side of the axially extending portion 52bb in a direction intersecting the axial direction and connects to the control substrate 80. Therefore, the exposed portion 52b1 of the conductive member 52b can easily approach the control substrate 80 via the extended holding portion 52d. In addition, since the exposed portion 52b1 has an axially extending portion 52bb, it is easy to bring the exposed portion 52b1 further closer to the control substrate 80 located on one axial side (+Y side) relative to the sensor substrate 53. Thus, the conductive member 52b connected to the sensor substrate 53 can be easily connected directly to the control substrate 80. Therefore, by inserting the sensor base 52 into the housing 30, the conductive component 52b provided on the sensor base 52 can be easily connected to the control board 80. This facilitates easy connection between the sensor board 53 and the control board 80, improving the assemblability of the pump 100. Consequently, the labor time and effort required for assembling the pump 100 can be reduced.

[0095] Furthermore, the axial extension 52bb allows the axial position of the first connection portion 52bc to be located on one side of the axial direction, thus enabling the connection position between the conductive member 52b and the control substrate 80 to be located on one side of the axial direction compared to the conventional method. As a result, it is not necessary to unnecessarily extend the control substrate 80 to the other side of the axial direction, allowing the control substrate 80 to be miniaturized in the axial direction.

[0096] In this embodiment, by tilting the sensor base 52 while inserting the extension retaining portion 52d into the insertion hole 31b provided on the housing 30, and rotating the sensor base 52 as a whole to achieve a mounting position, the sensor base 52 can be positioned within the housing 30, and the first connecting portion 52bc can reach the control board 80. Thus, the exposed portion 52b1 protruding from the extension retaining portion 52d can be connected to the control board 80.

[0097] In this embodiment, the bearing cage 70 has a first cutout 71f at a position opposite to the insertion hole 31b, cut in a direction away from the insertion hole 31b. Therefore, when a portion of the sensor base 52 is inserted into the insertion hole 31b, interference between the sensor base 52 and the bearing cage 70 can be suppressed. Furthermore, the outer cylindrical portion 61 of the cover member 60 has a second cutout 61f at a position opposite to the insertion hole 31b, cut in a direction away from the insertion hole 31b. Therefore, when a portion of the sensor base 52 is inserted into the insertion hole 31b, interference between the sensor base 52 and the cover member 60 can be suppressed. Additionally, the second cutout 61f has an inclined portion 61g on its edge on the opposite axial side. Therefore, when a portion of the sensor base 52 is inserted into the insertion hole 31b, interference between the sensor base 52 and the cover member 60 can be further suppressed.

[0098] Furthermore, according to this embodiment, when viewed from a direction intersecting the axial direction, at least a portion of the conductive member 52b and at least a portion of the busbar 51b overlap each other. Therefore, interference between the conductive member 52b and the busbar 51b can be avoided, and the conductive member 52b and the busbar 51b can be appropriately positioned close to each other. Specifically, in this embodiment, by making the busbar 51b and the conductive member 52b have the same curved shape, mutual interference can be avoided, and the connection positions relative to the control substrate 80 can be made close to each other. Thus, the conductive member 52b and the busbar 51b can be connected to the control substrate 80 with good space efficiency. Moreover, by making the busbar 51b and the conductive member 52b have a curved shape (crank shape) as described above, vibration resistance is improved, and the connection with the control substrate 80 can be maintained while mitigating external impacts, vibrations from the motor 10, etc. Furthermore, even if the sensor base 52 is located on the opposite side of the axis (-Y side: the position away from the sensor base 52) than the busbar assembly 51, it can be connected to the control board 80 through the curved shape of the extension 52ba.

[0099] The shape of the retainer 52a is not limited to the shape described above. In this embodiment, the extended retaining portion 52d has a first portion 52e extending axially and a second portion 52f extending in a direction intersecting the axial direction, but it may also have only the first portion 52e. When inserted into the insertion hole 31b of the housing body portion 31, the length of the extended retaining portion 52d can be appropriately changed as long as interference between the conductive component 52b exposed from the extended retaining portion 52d and other components can be avoided.

[0100] The application of the rotary motor of the present invention is not particularly limited. The rotary motor can also be mounted on equipment other than a pump. The application of a pump equipped with a rotary motor is not particularly limited. The type of fluid transported by the pump is not particularly limited; it can be water, etc. The rotary motor and the pump can also be mounted on equipment other than a vehicle. Furthermore, the various structures and methods described in this specification can be appropriately combined without contradiction.

Claims

1. A pump, characterized in that, have: A motor having a rotor capable of rotating about a central axis and a stator opposite the rotor with a gap; The pump mechanism is connected to one axial side of the aforementioned rotor; A control board is located radially outside the motor and extends axially. A sensor substrate, which is equipped with a rotation sensor for detecting the rotation angle of the aforementioned rotor; A sensor base that holds the aforementioned sensor substrate; A housing that houses the aforementioned motor, pump mechanism, control board, sensor board, and sensor base; and Busbar assembly having a busbar electrically connected to the stator described above, The aforementioned sensor substrate is disposed on the opposite side of the axial direction of the aforementioned motor, and is arranged in a direction intersecting the axial direction. The aforementioned sensor base has: Multiple conductive components electrically connect the sensor substrate and the control substrate by mounting the sensor base into the housing; and A retainer that holds the aforementioned multiple conductive components. The aforementioned retainer has an extended retaining portion extending toward the aforementioned control substrate. The aforementioned plurality of conductive components each have an exposed portion that protrudes from the aforementioned extended retaining portion. The exposed portion described above has: An axial extension that extends axially; and The first connecting portion bends from one end of the axially extending portion in a direction intersecting the axial direction and connects to the control substrate. The motor, the busbar assembly, and the sensor base are arranged sequentially from one axial side to the other axial side.

2. The pump according to claim 1, characterized in that, The aforementioned sensor base is located on the opposite side of the axis, further away from the aforementioned busbar assembly.

3. The pump according to claim 2, characterized in that, The aforementioned busbar has a second connection portion that connects to the aforementioned control board. The first connecting portion is connected to the control substrate on the axial side, which is further away from the second connecting portion.

4. The pump according to claim 3, characterized in that, When viewed from a direction intersecting the axial direction, at least a portion of the conductive component overlaps with at least a portion of the busbar.

5. The pump according to claim 2, characterized in that, have: Bearings that support the aforementioned rotor to enable it to rotate; and A bearing cage, which holds the aforementioned bearing, is disposed opposite to one axial side of the aforementioned sensor base. The aforementioned housing has an insertion hole through which the aforementioned extension retaining portion passes. The bearing cage has a first cutout at a position opposite to the insertion hole, formed by a cutout in a direction away from the insertion hole.

6. The pump according to claim 5, characterized in that, It includes a cover component located on one axial side of the aforementioned bearing cage. The aforementioned busbar assembly has a busbar retainer for holding the aforementioned busbar. The aforementioned busbar has a coil connection portion that protrudes from the busbar holder and connects to a lead extending from the coil of the stator. The aforementioned cover component has an outer cylindrical portion that covers the aforementioned coil connection portion from the radially outward side. The outer cylinder portion has a second cut portion formed by cutting in a direction away from the insertion hole at a position opposite to the insertion hole.

7. The pump according to claim 6, characterized in that, The second cut portion has an inclined portion on the edge on the other side of the axial direction.

8. The pump according to any one of claims 5 to 7, characterized in that, The aforementioned bearing cage and the aforementioned extended retainer overlap each other in at least a portion in a direction intersecting the axial direction.

9. The pump according to claim 1, characterized in that, The aforementioned extended retaining portion has: The first part, which extends axially; and The second part bends from one end of the first part along the axial direction in a direction intersecting the axial direction and extends toward the control substrate. The aforementioned exposed portion is exposed from the front end face of the aforementioned second part.

10. The pump according to claim 1, characterized in that, The aforementioned sensor substrate is held on the opposite side of the axial direction of the aforementioned sensor base. The aforementioned conductive component has a sensor substrate connection portion that is connected to the aforementioned sensor substrate. The aforementioned sensor substrate connection portion extends through the sensor substrate from one axial side to the other axial side. The first connecting portion extends through the control substrate from the motor side.

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