CN215672693U

CN215672693U - Electric pump

Info

Publication number: CN215672693U
Application number: CN202120506404.3U
Authority: CN
Inventors: 小林喜幸; 片冈慈裕
Original assignee: Nidec Tosok Corp
Current assignee: Nidec Powertrain Systems Corp
Priority date: 2020-03-13
Filing date: 2021-03-10
Publication date: 2022-01-28
Anticipated expiration: 2031-03-10
Also published as: JP2021143661A

Abstract

An electric pump comprising: a motor having a rotor rotatable about a central axis; a pump mechanism coupled to the motor; a control substrate located radially outside the motor; a motor housing accommodating the motor; and a joint bus bar connecting the control substrate and the motor. And the electric pump includes a substrate holder that holds the control substrate and is mountable to the motor case. The tab bus bar is insert-molded in the substrate holder. The utility model provides an electric pump which can use a large-sized control substrate while inhibiting the whole large-sized electric pump, and is easy to assemble.

Description

Electric pump

Technical Field

The present invention relates to an electric pump.

Background

Conventionally, as an electric pump, a structure is known in which a motor, a pump mechanism, and a control board for controlling the motor are housed in a pump body.

In an electric pump in which a control board and a motor are arranged in an axial direction, for example, when a large-sized control board is used for increasing the output, the control board greatly protrudes in a radial direction of the motor. Therefore, the electric pump becomes large.

[ patent document 1] Japanese patent No. 5969342 publication

SUMMERY OF THE UTILITY MODEL

[ means for solving problems ]

According to an embodiment of the present invention, there is provided an electric pump including: the motor includes a motor having a rotor rotatable about a central axis, a pump mechanism coupled to the motor, a control board located radially outside the motor, a motor case housing the motor, and a joint bus bar connecting the control board and the motor. The electric pump has a substrate holder that holds the control substrate and is mountable on the motor housing. The joint bus bar is embedded and formed on the substrate support.

According to an embodiment of the present invention, the substrate holder has an opening portion that opens toward the motor side, the control substrate is disposed inside the opening portion of the substrate holder, and the substrate holder has a bus bar support portion that protrudes from an opening end portion of the substrate holder toward the motor side.

According to the electric pump of one embodiment of the present invention, the bus bar supporting portion holds a plurality of the joint bus bars.

According to an embodiment of the present invention, the substrate holder has a bottom wall facing a surface of the control substrate facing a side opposite to the motor, and the joint bus bar includes: a first portion extending radially outward from a position connected to the motor and inserted into the bus bar support portion; a second portion extending from a connection position with the control substrate toward the bottom wall of the substrate holder; and a third portion connecting the first portion and the second portion.

An electric pump according to an embodiment of the present invention includes a pump body capable of housing the motor and the control board, the pump body including: a motor housing accommodating the motor; a substrate case accommodating the control substrate; and a receiving portion extending in a radial direction between the motor housing and the substrate housing, the joint bus passing through the receiving portion to connect the control substrate and the motor.

According to an embodiment of the present invention, the electric pump includes: a stator facing the rotor in a radial direction; and the bus is positioned on one axial side of the stator and is electrically connected with the stator, and the joint bus electrically connects the bus with the control substrate.

[ effects of the utility model ]

According to an embodiment of the present invention, there is provided an electric pump that can use a large-sized control board while suppressing an increase in the overall size, and that can also be easily assembled.

Drawings

Fig. 1 is a sectional view of an electric pump of the embodiment.

Fig. 2 is a perspective view showing an internal structure of the electric pump according to the embodiment.

Fig. 3 is a side view showing an internal structure of the electric pump according to the embodiment.

Fig. 4 is a partial perspective view showing a substrate unit according to the embodiment.

Fig. 5 is a diagram showing a connection structure of the stator and the control board according to the embodiment.

[ description of reference numerals ]

10: pump body

11: motor shell

13: substrate shell

20: motor with a stator having a stator core

22: rotor

23: stator

24a to 24 c: bus bar

30: pump mechanism

40: control substrate

51a to 51 c: joint bus

100: electric oil pump

140: substrate unit

141: substrate support

141 c: bus bar support part

141 d: opening part

J: center shaft

Detailed Description

Hereinafter, the electric oil pump will be described as an embodiment of the electric pump. The electric oil pump of the embodiment is used for supplying oil to equipment mounted on a vehicle or the like.

Hereinafter, in each of the drawings referred to, an XYZ coordinate system is shown as a suitable three-dimensional orthogonal coordinate system. In the XYZ coordinate system, the X-axis direction is a direction parallel to the axial direction of the central axis J shown in fig. 1. The center axis J is a center axis of a shaft 21 of the motor 20 described later. The Y-axis direction is a direction parallel to the depth direction in fig. 1 among directions orthogonal to the X-axis. The Z-axis direction is a direction orthogonal to both the X-axis direction and the Y-axis direction, and is a direction parallel to the vertical direction in fig. 1. In any one of the X-axis direction, the Y-axis direction, and the Z-axis direction, one side indicated by an arrow shown in the drawing is set as a + side, and the opposite side is set as a-side.

In the following description, unless otherwise specified, a direction (X-axis direction) parallel to the central axis J will be simply referred to as "axial direction". The radial direction centered on the central axis J is simply referred to as "radial direction". The circumferential direction around the central axis J, that is, the axial direction (θ direction) around the central axis J is simply referred to as "circumferential direction".

The positive side (+ X side) in the X axis direction may be referred to as "front side". Similarly, the negative side (X side) in the X axis direction is sometimes referred to as "rear side". The front side (+ X side) corresponds to one axial side in the present invention. The rear side (X side) corresponds to the other axial side in the present invention.

As shown in fig. 1 and 2, the electric oil pump 100 of the present embodiment includes: pump body 10, motor 20, pump mechanism 30, and base plate unit 140 having control base plate 40.

The pump body 10 includes a motor housing 11 that houses the motor 20, a pump housing 12 that houses the pump mechanism 30, and a substrate housing 13 on which the control substrate 40 is provided. In the present embodiment, the motor housing 11, the pump housing 12, and the substrate housing 13 are parts of separate members.

The motor housing 11 is located on the rear side (-X side) of the pump body 10. The motor housing 11 is cylindrical and extends in the axial direction. The motor housing 11 has a first housing recess 11a including a recess opening toward the rear side. The first housing recess 11a is closed from the rear side by a bearing holder 26 described later.

The pump housing 12 is located on the front side (+ X side) of the pump body 10. The pump housing 12 has a second housing recess 12a including a recess opening to the front side. The electric oil pump 100 has a pump cover 12b, and the pump cover 12b closes the second receiving recess 12a from the front side. The pump cover 12b is a circular plate-shaped member as viewed in the axial direction. The pump cover 12b is screwed to the pump housing 12.

The substrate case 13 is located on the side of the motor case 11 and the pump case 12. The substrate case 13 is located below (on the Z side) of the motor case 11 and the pump case 12. The substrate case 13 has a substantially rectangular shape as viewed from the radially outer side. The substrate case 13 has a third housing recess 13a that opens toward the lower side of the pump body 10. A substrate unit 140 described later is attached to the substrate case 13 from the lower side in the drawing.

The pump body 10 has a first through hole 10a and a second through hole 10b therein. The first through hole 10a axially connects the first receiving recess 11a of the motor housing 11 and the second receiving recess 12a of the pump housing 12. The second through hole 10b connects the first accommodating recess 11a of the motor housing 11 and the third accommodating recess 13a of the substrate housing 13 in the radial direction. That is, the second through hole 10b is a housing portion extending in the radial direction between the motor housing 11 and the substrate housing 13 and housing the tab bus 51a to 51c described later. The receiving portion is not limited to the through hole, and may be, for example, a groove that opens in the axial direction and extends in the radial direction. When the housing portion is a groove, the opening of the groove may be closed by a bearing holder 26 described later.

The motor 20 includes: the motor includes a rotor 22 having a shaft 21, a stator 23, a bus bar unit 120, a bearing holder 26, a first bearing 27, and a second bearing 28. The busbar unit 120 has a busbar assembly 24, and a busbar cover 25. The bearing bracket 26 closes the opening of the motor housing 11. In the present embodiment, the bearing holder 26 also serves as a motor cover.

The shaft 21 is a columnar member extending along the center axis J. The rotor 22 has: shaft 21, rotor core 22a fixed to the outer peripheral surface of shaft 21, and a plurality of rotor magnets 22b fixed to rotor core 22 a. The rotor magnet 22b may be an annular magnet surrounding the shaft 21.

The shaft 21 is supported by a first bearing 27 and a second bearing 28 so as to be rotatable around the shaft. The first bearing 27 supports a portion of the shaft 21 on the rear side of the rotor core 22 a. The second bearing 28 supports a portion of the shaft 21 on the front side of the rotor core 22 a. The shaft 21 protrudes to the front side through the inner hole of the second bearing 28. The front end of the shaft 21 is connected to a pump mechanism 30.

The stator 23 includes: an annular stator core 23a surrounding the rotor 22, an insulator (insulator)23b attached to the teeth of the stator core 23a, and a coil 23c wound around the teeth via the insulator 23 b. The stator core 23a is fixed to the inner circumferential surface of the cylindrical motor case 11.

The bus bar unit 120 is located between the stator 23 and the bearing bracket 26. The busbar unit 120 includes a busbar assembly 24 and a busbar cover 25 arranged in an axial direction. The bus bar assembly 24 is axially opposed to the stator 23. The bus bar cover 25 faces the bearing bracket 26 in the axial direction.

As shown in fig. 2 and 3, the bus bar assembly 24 includes: the bus bar 24a, the bus bar 24b, the bus bar 24c, and a resin bus bar holder 24d holding the bus bars 24a to 24 c. The three bus bars 24a to 24c are insert-molded in the bus bar holder 24 d. The fixing method of the bus bars 24a to 24c can be screw fixing or buckle fastening.

As shown in fig. 1, the bus bar assembly 24 is located at the rear side of the stator 23. The bus bar assembly 24 is inserted into the first receiving recess 11a of the motor housing 11 from the rear side. As shown in fig. 3 and 5, one end of each of the three bus bars 24a to 24c has a hook shape. The hook-shaped end portions of the

bus bars

24a, 24b, and 24c are connected to coil wires 23d extending rearward from the coil 23 c. The other end portions of the bus bars 24a to 24c are positioned at the end portion of the bus bar holder 24d on the substrate case 13 side (lower side in the drawing). The ends of the

bus bars

24a, 24b, and 24c positioned below the bus bar holder 24d are connected to a joint bus bar 51a, a joint bus bar 51b, and a joint bus bar 51c, respectively, which will be described later.

The bus bar cover 25 is located at the rear side of the bus bar assembly 24. The busbar cover 25 is inserted into the first housing recess 11a from the rear side. The bus bar cover 25 is annular when viewed from the axial direction. The bus bar cover 25 covers the bus bar assembly 24 from the rear side. The bus bar cover 25 has an annular groove portion 25a on a surface facing the rear side in the axial direction. An elastic member 25b including an O-ring is disposed inside the groove portion 25 a.

The bearing bracket 26 is located on the rear side of the busbar unit 120. The bearing holder 26 includes a cylindrical portion 26a extending along the central axis J, and a holder main body 26b extending radially outward from the outer circumferential surface of the cylindrical portion 26 a. The cylindrical portion 26a is open on both sides in the axial direction. The first bearing 27 is inserted into an opening portion on the front side of the cylindrical portion 26 a. The cylindrical portion 26a has a stepped surface 26c facing the front side at a part of the inner peripheral surface. The movement of the first bearing 27 to the rear side is restricted by the step surface 26 c.

The bearing bracket 26 is expanded to the outside of the busbar unit 120 in the radial direction. The bearing bracket 26 covers the bus bar unit 120 from the rear side. The bearing holder 26 is screwed to the pump body 10 radially outside the busbar unit 120. The front surface of the bearing bracket 26 and the rear surface of the busbar cover 25 face each other in the axial direction.

The motor housing 11 has a groove 11c that opens toward the rear side on an end surface surrounding the first accommodation recess 11 a. The groove 11c is annular when viewed from the axial direction. A seal member 29 including an O-ring is disposed inside the groove portion 11 c. The seal member 29 hermetically seals between a front surface of the bearing holder 26 and a rear end surface of the motor housing 11.

The bearing holder 26 closes the first receiving recess 11a from the rear side, whereby the elastic member 25b is axially sandwiched between the bearing holder 26 and the busbar cover 25. The elastic member 25b is compressed in the axial direction by the busbar cover 25 and the bearing holder 26. The elastic member 25b applies an elastic force to the busbar cover 25 and the bearing holder 26 to separate the two in the axial direction. Since the bearing bracket 26 is fixed to the motor housing 11, the elastic restoring force of the elastic member 25b acts in a direction of pushing the bus bar cover 25 forward.

The busbar cover 25 functions as a spacer inserted between the busbar assembly 24 and the bearing bracket 26. The bus bar cover 25 is pressed to the front side by the elastic member 25b, thereby pressing the bus bar assembly 24 to the front side. The front end 24e of the bus bar assembly 24 abuts on the stepped surface 11b of the motor housing 11 facing the rear side. According to this structure, the busbar assembly 24 and the busbar cover 25 are fixed in the axial direction. The end 24e of the bus bar assembly 24 may abut the stator 23.

In the electric oil pump 100 of the present embodiment, the bus bar unit 120 in the first housing recess 11a can be fixed only by fixing the bearing holder 26 to the motor housing 11 in the assembly step. Therefore, the electric oil pump 100 of the present embodiment includes a configuration that enables efficient assembly by the operator.

The bus bar unit 120 may be a member to which the bus bar cover 25 and the bus bar assembly 24 are fixed. For example, the bus bar cover 25 and the bus bar holder 24d may be formed as a part of a separate component. The bus bar cover 25 and the bus bar assembly 24 can be joined by bonding, screwing, or the like.

The breather 26e is inserted into the rear end of the cylindrical portion 26 a. The breather 26e allows air to flow between the inside and outside of the bearing bracket 26. The space inside the bearing holder 26 is connected to the inside of the first accommodating recess 11a via the cylindrical portion 26 a. The first receiving recess 11a is continuous with the second receiving recess 12a and the third receiving recess 13 a. Therefore, the breather 26e allows air to flow between the internal space and the external space of the pump body 10.

In the electric oil pump 100, the bearing holder 26 for holding the first bearing 27 functions as a motor cover, and therefore, compared with a configuration in which the motor cover and the bearing holder are separate parts, the manufacturing is easy and the assembling workability is improved.

In the electric oil pump 100, the bearing holder 26 functioning as a motor cover has a cylindrical portion 26a, the cylindrical portion 26a has a through hole axially penetrating the bearing holder 26, a breather 26e is held at a rear end portion of the cylindrical portion 26a, and a first bearing 27 is held at a front end portion of the cylindrical portion 26 a. According to this configuration, in the bearing holder 26, the first bearing 27 and the breather 26e are axially aligned, and therefore, the space around the first bearing 27 can be effectively utilized inside the first accommodating recess 11 a. The electric oil pump 100 can be suppressed from being large-sized.

The second bearing 28 is inserted into the first through hole 10a connecting the first accommodating recess 11a and the second accommodating recess 12a from the rear side. Inside the first through hole 10a, an oil seal 15, a fixed ring 16, a wave washer 17, and a second bearing 28 are arranged in this order from the front side.

The first through-hole 10a is a stepped hole having a plurality of steps therein. The first through hole 10a has therein a first step surface 10c and a second step surface 10d both facing rearward. Therefore, the inner diameter of the first through-hole 10a becomes smaller as it goes to the front side, each time it passes the step. The oil seal 15 is located between the first step surface 10c and the fixed ring 16 in the axial direction. The fixing ring 16 abuts on the second step surface 10d from the rear side. The fixing ring 16 supports the wave washer 17 by a face toward the rear side. The wave washer 17 presses the outer race of the second bearing 28 from the front side to the rear side.

The shaft 21 passes through the inner bores of the second bearing 28, wave washer 17, retaining ring 16 and oil seal 15. The front end of the shaft 21 passes through the first through hole 10a and reaches the second receiving recess 12 a.

The pump mechanism 30 includes an inner rotor 31 connected to a front end of the shaft 21, and an outer rotor 32 surrounding the inner rotor 31 from the radially outer side. The inner rotor 31 and the outer rotor 32 are accommodated between the second accommodation recess 12a and the pump cover 12 b. The inner rotor 31 and the outer rotor 32 have trochoid (trochoid) tooth profiles, respectively. That is, the pump mechanism 30 is a trochoid pump.

As shown in fig. 1 and 4, the substrate unit 140 includes a control substrate 40, a substrate holder 141 that holds the control substrate 40 from the radial outside, and three

joint bus bars

51a, 51b, and 51c that are insert-molded in the substrate holder 141.

The substrate holder 141 is a box-shaped member that opens toward the substrate housing 13 side (+ Z side). The control board 40 is fixed to an opening 141d of the board holder 141 facing upward in the figure. The substrate holder 141 has a bottom wall 141e, and the bottom wall 141e faces a surface (lower surface in the drawing) of the control substrate 40 facing the opposite side of the motor 20. In the case of the present embodiment, the control board 40 is screwed to the bottom wall 141 e.

In the present embodiment, the substrate holder 141 is made of resin. The substrate holder 141 includes a connector 141b in which a plurality of metal terminals 141a are insert-molded, and a bus bar support 141c in which a plurality of tab bus bars 51a to 51c are insert-molded.

The plurality of metal terminals 141a of the connector 141b are connected to the front end of the control board 40. The joint bus bars 51a to 51c are connected to the rear end of the control board 40. The plurality of metal terminals 141a and the tab bus bars 51a to 51c are joined to the control board 40 by solder.

The bus bar support 141c is a part of the substrate holder 141, and includes resin. The bus bar support 141c protrudes from the rear end of the substrate holder 141 toward the motor 20 (upper side in the figure). That is, the bus bar supporting portion 141c protrudes from the opening end of the substrate holder 141 toward the motor 20 side. The tab bus bars 51a to 51c extend from the connection position with the control board 40 to the rear side, and are inserted into the bus bar support portion 141 c. The joint bus bars 51a to 51c extend in the radial direction inside the bus bar support 141 c. The joint bus bars 51a to 51c protrude from the front end of the bus bar support 141c toward the motor 20.

The joint bus 51a to 51c connect the motor 20 and the control board 40. The tab bus bars 51a to 51c and the bus bar supporting portion 141c are inserted from the radial outside into the second through hole 10b connecting the third accommodating recess 13a and the first accommodating recess 11 a. The tip ends of the joint bus bars 51a to 51c are positioned in the first receiving recess 11a, and overlap the bus bar assembly 24 as viewed in the axial direction. The joint bus bar 51a to the joint bus bar 51c are screwed to the bus bars 24a to 24c of the bus bar assembly 24 by screws 53a to 53 c. Thereby, the control board 40 and the motor 20 are electrically connected via the joint bus 51a to the joint bus 51 c.

The substrate unit 140 is fixed to the substrate case 13 of the pump body 10 in a state where the control substrate 40 faces the motor 20 side. In the present embodiment, the substrate holder 141 of the substrate unit 140 is screwed to the substrate case 13. The control board 40 is enclosed between the pump body 10 and the board holder 141.

In the electric oil pump 100 of the present embodiment, the control board 40 is disposed along the side surface of the motor 20. Further, the pump body 10 includes a joint bus 51a, a joint bus 51b, and a joint bus 51c which are located inside the second through hole 10b and electrically connect the motor 20 and the control board 40. According to this configuration, the plate surface of the control board 40 is oriented in the radial direction, and the motor 20 and the control board 40 are connected in the radial direction by the joint bus bar 51a to the joint bus bar 51c, so that the control board 40 does not greatly protrude in the radial direction. Therefore, the electric oil pump 100 can be suppressed from being large.

Further, since the joint bus bars 51a to 51c made of a metal plate material are used, the connection inside the pump body 10 is facilitated. The electric oil pump 100 of the present embodiment can be manufactured efficiently.

The electric oil pump 100 of the present embodiment includes a substrate unit 140 in which the control substrate 40, the substrate holder 141, and the joint bus bars 51a to 51c are assembled as one component. According to this configuration, the control board 40 can be mounted by mounting the board unit 140 on the board case 13 and connecting the tab bus 51a to the tab bus 51c and the bus bars 24a to 24 c. The electric oil pump 100 of the present embodiment can be efficiently manufactured with a small number of steps.

In the present embodiment, the tab bus 51a to 51c and the control board 40 are connected to the board holder 141. Therefore, as in the case of fixing the control substrate 40 to the pump body 10, it is not necessary to solder-bond the side surface of the pump body 10. The workability in the assembling work is improved. In addition, the control board 40 is easily detached from the pump body 10 at the time of maintenance.

In the present embodiment, the tab bus bar 51a to the tab bus bar 51c are supported by the bus bar supporting portion 141c protruding from the substrate holder 141 toward the motor 20 side, and the bus bar supporting portion 141c is inserted into the second through hole 10b together with the tab bus bar 51a to the tab bus bar 51 c. Thus, the resin bus bar supporting portion 141c is disposed between the inner wall surface of the second through hole 10b and the joint bus bar 51a to 51c, and therefore, short circuits due to contact or proximity of the joint bus bar 51a to 51c with the pump body 10 are less likely to occur.

In the present embodiment, as shown in fig. 1, the joint bus bar 51b includes: a first portion 151 extending radially outward from a position connected to the motor 20 and inserted into the bus bar supporting portion 141 c; a second portion 152 extending from a connection position with the control substrate 40 toward the bottom wall 141e of the substrate holder 141; and a third portion 153 connecting the first portion 151 with the second portion 152. The other joint bus bar 51a and the joint bus bar 51c have the same configuration. That is, the joint bus bar 51a to the joint bus bar 51c have a shape bent substantially in a U shape.

The tab bus bars 51a to 51c are insert-molded in the substrate holder 141, and both ends are exposed from the resin portion of the substrate holder 141. The third portions 153 of the tab bus bars 51a to 51c protrude from the inner wall surface of the substrate holder 141 toward the front side (+ X side), pass through the gap between the control substrate 40 and the bottom wall 141e, and are connected to the ends of the second portions 152. The second portion 152 extends from a connection position with the third portion 153 toward the control substrate 40.

With this configuration, the second portions 152 of the tab bus bars 51a to 51c are arranged with their distal ends facing the opening 141d side. This allows the control board 40 to be disposed through the opening 141d of the board holder 141, and the connection bus bars 51a to 51c to be easily connected. The operator can efficiently assemble the substrate unit 140.

Further, since the third portion 153 of the joint bus bar 51a to the joint bus bar 51c partially overlaps the control board 40 when viewed in the radial direction, the substrate holder 141 is easily prevented from being enlarged in the axial direction (X-axis direction).

The connection portions between the joint bus bars 51a to 51c and the bus bars 24a to 24c are located on the rear surface of the bus bar assembly 24. Thereby, the screws 53a to 53c that fix the joint bus bars 51a to 51c and the bus bars 24a to 24c can be axially fastened in the opening of the motor case 11. Therefore, assembly of the electric oil pump 100 becomes easy.

In the present embodiment, the plurality of tab bus bars 51a to 51c are supported by one bus bar support portion 141 c. This makes it easy to assemble the electric oil pump 100 because there is one member inserted into the second through hole 10 b. Further, since the plurality of joint bus bars 51a to 51c are fixed in a state of being positioned with respect to each other, the plurality of joint bus bars 51a to 51c are not easily displaced and are easily screwed to the bus bars 24a to 24 c. The

joint bus bars

51a, 51b, and 51c may be supported by the bus bar supporting portions.

Claims

1. An electric pump, comprising:

a motor having a rotor rotatable about a central axis;

a pump mechanism coupled to the motor;

a control substrate located radially outside the motor;

a motor housing accommodating the motor; and

a joint bus connecting the control substrate and the motor, and

the electric pump has a substrate holder that holds the control substrate and is attachable to the motor housing,

the joint bus bar is embedded and formed on the substrate support.

2. The electric pump of claim 1,

the substrate holder has an opening portion that opens toward the motor side,

the control substrate is arranged inside the opening of the substrate holder,

the substrate holder has a bus bar support portion protruding from an opening end portion of the substrate holder toward the motor side.

3. The electric pump of claim 2,

the bus bar support portion holds a plurality of the tab bus bars.

4. The electric pump according to claim 2 or 3,

the substrate holder has a bottom wall facing a surface of the control substrate facing a side opposite to the motor,

the joint bus bar includes:

a first portion extending radially outward from a position connected to the motor and inserted into the bus bar support portion;

a second portion extending from a connection position with the control substrate toward the bottom wall of the substrate holder; and

a third portion connecting the first portion and the second portion.

5. The electric pump according to any one of claims 1 to 3, comprising a pump body capable of housing the motor and the control substrate,

the pump body includes:

a motor housing accommodating the motor;

a substrate case accommodating the control substrate; and

and a receiving part extending in a radial direction between the motor housing and the substrate housing, wherein the joint bus passes through the receiving part to connect the control substrate and the motor.

6. The electric pump according to any one of claims 1 to 3,

the motor includes:

a stator facing the rotor in a radial direction; and

a bus bar located at one axial side of the stator and electrically connected with the stator,

the connector bus electrically connects the bus bar with the control substrate.