KR102343088B1 - Electric pump - Google Patents

Abstract

The present invention includes a rotating shaft and a rotor coupled to the rotating shaft, a stator disposed outside the rotor, a motor unit including a motor housing accommodating the rotor and the stator, and a connector unit disposed above the motor unit, the motor The part has at least one hole, and the connector part provides an electric pump including at least one second protrusion inserted into the hole.

Description

Electric pump {ELECTRIC PUMP}

The embodiment relates to an electric pump.

In general, an electric oil pump (EOP) is a device that supplies oil to a hydraulic line by using a motor in a transmission or braking device that requires oil circulation in a vehicle.

In the case of an HEV vehicle, since the engine is stopped when the vehicle is stopped, it is difficult to supply a constant pressure to the transmission through a mechanical oil pump. For this reason, HEV vehicles employ an electric oil pump that supplies oil through a motor.

Various components as well as the housing cover may be coupled to the upper portion of the motor housing. When the plastic mold is coupled to the upper part of the motor housing, there is a problem in that rotation cannot be restricted.

In addition, when the plastic mold is coupled, there is a problem in that the position of the parts to be placed in the correct position is changed because the position of the plastic mold is not fixed.

The embodiment provides an electric pump in which the motor housing and the connector part can be connected to the correct position.

The problems to be solved by the present invention are not limited to the problems mentioned above, and other problems not mentioned here will be clearly understood by those skilled in the art from the following description.

In an embodiment of the present invention, a motor unit including a rotating shaft and a rotor coupled to the rotating shaft, a stator disposed outside the rotor, and a motor housing accommodating the rotor and the stator; a connector part disposed on the motor part; It provides an electric pump including at least one hole in the motor part and at least one second protrusion in the connector part inserted into the hole.

The end of the motor housing includes a protrusion having a predetermined area, the connector part includes a connector body and a connector connector disposed to face the protrusion, the protrusion includes the hole, and the connector connector includes the second connector. 2 protrusions are arranged and can be inserted into the hole.

The connector connection part may include a first connection part connected to a side surface of the connector body, in which the second protrusion is disposed, and a second connection part connected to have a predetermined angle from the first connection part.

A plurality of grooves may be disposed so that both sides of the connector connection part are symmetrical left and right, and the second protrusion may be disposed between the grooves.

The connector connection part may have a rib formed in a longitudinal direction, and the second protrusion may be disposed on the rib.

The second protrusion may be provided in a cylindrical shape, and an inclined surface may be disposed at an upper end of the second protrusion along a circumference.

According to the embodiment, by combining the connector part at a designated position, there is an effect that can minimize the performance deviation for each product.

In addition, there is an effect that can reduce the manufacturing method and process investment cost by simplifying the shape of the motor housing for fixing the position.

Various and advantageous advantages and effects of the present invention are not limited to the above, and will be more easily understood in the course of describing specific embodiments of the present invention.

1 is a perspective view of an electric pump according to an embodiment of the present invention;
Figure 2 is an exploded perspective view of Figure 1,
3 is a view showing the configuration of the motor unit, which is a component of FIG. 1,
4 is a view showing the structure of a bus bar, which is a component of FIG. 1,
5 is a view showing the configuration of a connector part, which is a component of FIG. 1;
6 is a view showing the arrangement of a power terminal provided in the connector part, which is a component of FIG. 1;
7 is a view showing a structure in which a bus bar and a power terminal are connected in FIG. 1;
Figure 8 is a view showing the structure of the end of the power terminal in Figure 7,
9 is an embodiment of a bus bar terminal coupled to the power terminal in FIG. 7;
10 is a view showing a structure in which the motor housing and the connector part are connected in FIG. 2;
11 is a view showing a first suction port and a first discharge port formed on the first cover in FIG. 2;
12 is a view showing a second suction port and a second discharge port formed on the second cover in FIG. 2;
13 is a view showing the configuration of the pump unit in FIG. 2,
14 is a view showing a state in which the pump unit is located on the first cover;
15 is a view showing a state in which the pump unit is located on the second cover;
16 is a view illustrating a change in flow rate performance when the second cover shape of FIG. 15 is applied.

Since the present invention may have various changes and may have various embodiments, specific embodiments will be illustrated and described in the drawings. However, this is not intended to limit the embodiment of the present invention to a specific embodiment, and should be understood to include all changes, equivalents, or substitutes included in the spirit and scope of the embodiment.

Terms including an ordinal number, such as first, second, etc., may be used to describe various elements, but the elements are not limited by the terms. The above terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the second component may be referred to as the first component, and similarly, the first component may also be referred to as the second component. and/or includes a combination of a plurality of related listed items or any of a plurality of related listed items.

The terms used in the present application are only used to describe specific embodiments, and are not intended to limit the embodiments of the present invention. The singular expression includes the plural expression unless the context clearly dictates otherwise. In the present application, terms such as "comprise" or "have" are intended to designate that a feature, number, step, operation, component, part, or a combination thereof described in the specification exists, but one or more other features It should be understood that this does not preclude the possibility of the presence or addition of numbers, steps, operations, components, parts, or combinations thereof.

In the description of the embodiment, in the case where one element is described as being formed in "on or under" of another element, on (above) or below (on) or under) includes both elements in which two elements are in direct contact with each other or one or more other elements are disposed between the two elements indirectly. In addition, when expressed as "up (up) or down (on or under)", it may include the meaning of not only an upward direction but also a downward direction based on one element.

Hereinafter, the embodiment will be described in detail with reference to the accompanying drawings, but the same or corresponding components are given the same reference numerals regardless of reference numerals, and overlapping descriptions thereof will be omitted.

1 to 16, in order to clearly understand the present invention conceptually, only the main characteristic parts are clearly shown, and as a result, various modifications of the illustration are expected, and the scope of the present invention is limited by the specific shape shown in the drawings it doesn't have to be

1 is a perspective view of an electric pump according to an embodiment of the present invention, and FIG. 2 is an exploded perspective view of FIG. 1 .

1 and 2 , the electric pump according to an embodiment of the present invention includes a motor unit 100 , a connector unit 200 , a first cover 300 , a pump unit 400 , and a second cover 500 . may include

The motor unit 100 generates power to transmit power to the traditional pump, and the connector unit 200 is disposed on the motor unit 100 to supply power to the motor unit 100 .

The connector part 200 is disposed on the upper part of the motor part 100 and includes a connector body 210 disposed on the motor housing 150 and a connector connection part 230 connected to a side surface of the connector body 210 . can A first through hole 211 through which the rotation shaft 110 of the motor unit 100 passes may be included.

The first cover 300 is disposed between the connector unit 200 and the pump unit 400 , and includes a second through hole 340 through which the rotation shaft 110 of the motor unit 100 passes.

The pump unit 400 is disposed between the first cover 300 and the second cover 500 , and a third through hole through which the rotation shaft 110 passing through the first cover 300 is coupled may be formed.

The second cover 500 is disposed on the front surface of the pump unit 400 , and may be coupled to the first cover 300 to accommodate the pump unit 400 .

FIG. 3 is a view showing the configuration of the motor unit 100 which is a component of FIG. 1 .

Referring to FIG. 3 , the motor unit 100 transmits power to the pump unit 400 , and the rotating shaft 110 , the rotor 120 , the stator 130 , the bus bar 140 , and the motor housing 150 ). may include

The rotating shaft 110 may be coupled to the rotor 120 . When electromagnetic interaction occurs between the rotor 120 and the stator 130 through the supply of current, the rotor 120 rotates and the rotating shaft 110 rotates in conjunction with this. The rotating shaft 110 may be supported by a bearing.

The rotor 120 is disposed inside the stator 130 . The rotor 120 may include a rotor core and a magnet coupled to the rotor core. The rotor 120 may be divided into the following forms according to the coupling method between the rotor core and the magnet.

The rotor 120 may be implemented as a type in which a magnet is coupled to an outer circumferential surface of the rotor core. In this type of rotor 120 , a separate can member may be coupled to the rotor core to prevent the magnet from being separated and to increase the coupling force. Alternatively, the magnet and the rotor core may be integrally formed by double injection.

The rotor 120 may be implemented as a type in which a magnet is coupled to the inside of the rotor core. In this type of rotor 120, a pocket into which a magnet is inserted may be provided inside the rotor core.

Meanwhile, the rotor core may have two main types.

First, the rotor core may be formed by stacking a plurality of plates in the form of thin steel plates. In this case, the rotor core may be formed as a single product that does not form a skew angle, or a plurality of unit cores (Pucks) that form a skew angle are combined.

Second, the rotor core may be formed in a single barrel shape. In this case, the rotor core may be formed as a single product that does not form a skew angle, or a plurality of unit cores (Pucks) that form a skew angle are combined.

Meanwhile, the unit cores may each include a magnet outside or inside.

The stator 130 induces electrical interaction with the rotor 120 to induce rotation of the rotor 120 . A coil 131 may be wound around the stator 130 to induce interaction with the rotor 120 . The specific configuration of the stator 130 for winding the coil 131 is as follows.

The stator 130 may include a stator core including a plurality of teeth. The stator core may be provided with an annular yoke, and may be provided with teeth directed toward the center from the yoke. The teeth may be provided at regular intervals along the circumference of the yoke. Meanwhile, the stator core may be formed by stacking a plurality of plates in the form of thin steel plates. In addition, the stator core may be formed by coupling or connecting a plurality of divided cores to each other.

The bus bar 140 may be disposed on the upper end of the stator 130 to be electrically connected to the coil 131 . The bus bar 140 may include a bus bar body 141 and a bus bar terminal 143 . The bus bar body 141 may be implemented as an annular mold member. The bus bar terminal 143 is connected to an end of the coil 131 raised from the stator 130 assembly or the rotor 120 assembly.

The bus bar 140 may electrically connect the coils 131 wound around the stator 130 or the rotor 120 to be electrically connected to the power terminals 250 on U, V, and W phases.

The motor housing 150 is formed in a cylindrical shape, and the stator 130 may be coupled to the inner wall. The upper part of the housing may be implemented in an open state, and the lower part of the housing may be implemented in a closed state. A bearing mounting space for accommodating a bearing supporting a lower portion of the rotating shaft 110 may be provided at a lower portion of the housing.

4 is a view showing the structure of the bus bar 140, which is a component of FIG. 1,

The bus bar terminal 143 is provided in an arc shape, and may include a plurality of connection terminals 143a to be coupled to the coil 131 . In one embodiment, three bus bar terminals 143 may be configured to electrically connect the coil 131 wound to the stator 130 , and each terminal may be delta-connected.

FIG. 5 is a view showing the configuration of the connector unit 200 as a component of FIG. 1 , and FIG. 6 is a view showing the arrangement of the power terminal 250 provided in the connector unit 200 which is a component of FIG. 1 .

5 and 6 , the connector unit 200 may include a connector body 210 disposed on the upper portion of the motor unit 100 and a connector connection unit 230 connected to one side of the body to receive power. have.

The connector body 210 may have a first through hole 211 through which the rotation shaft 110 passes, and one area may be inserted into the motor housing 150 . A sealing portion for maintaining airtightness when coupled to the motor housing 150 may be provided on a side surface of the connector body 210 .

A plurality of power terminals 250 may protrude to the outside of the connector body 210 . In one embodiment, three power terminals 250 may be provided, which may be electrically connected to each of the bus bar terminals 143 .

The connector connection unit 230 is connected to the connector body 210 and may receive power from the outside. In one embodiment, the power terminal 250 protruding to the outside of the connector body 210 may be provided in a bent shape to pass through the connector body 210 and the connector connection part 230 . The shape of the power terminal 250 is not limited, and various modifications may be made according to the shape of the connector connection part 230 connected to the connector body 210 .

FIG. 7 is a view showing a structure in which the bus bar 140 and the power terminal 250 are connected in FIG. 1 , and FIG. 8 is a view showing the structure of an end of the power terminal 250 in FIG. 7 .

7 and 8 , the power terminal 250 may be electrically connected to the power terminal 250 by inserting the bus bar terminal 143 .

An end of the power terminal 250 may be branched into a pair of contact portions 251 . Ends of the pair of contact parts 251 are spaced apart from each other, and the bus bar terminal 143 may be inserted between the spaced spaces. The separation distance d1 of the end portion of the contact portion 251 may be formed to be narrower than the width of the bus bar terminal 143 , and may be elastically deformed when the contact portion 251 is inserted.

In one embodiment, the separation distance d1 between the contact portions 251 increases in width d1 in the first area A1 at the branching point, and in the second area A2, the width d1 becomes narrow again. and the width d1 increases again in the third area A3. This is a design according to the stress analysis result to prevent cracking by the expansion force acting when the contact portion 251 is opened to contact the bus bar terminal 143 . As a result of the stress analysis, the damage caused by stress was minimized by making the branching region (X1), where the stress acts the most, as a curved surface.

A section changing from the second area A2 to the third area A3 comes into contact with the bus bar terminal 143 , and the third area A3 has a curved surface to facilitate the inflow of the bus bar terminal 143 . can be provided.

In addition, a plurality of first protrusions 141a for guiding the position of the contact portion 251 may be provided on the bus bar body 141 . Each of the first protrusions 141a may be provided as a pair, and may be provided to protrude above the bus bar body 141 .

A pair of first protrusions 141a are disposed to be spaced apart from each other, and a bus bar terminal 143 may pass between the first protrusions 141a. The power terminal 250 is inserted between the first protrusions 141a, and the contact portion 251 may be inserted into contact with the bus bar terminal 143 passing between the first protrusions 141a.

The first protrusion 141a guides the position of the bus bar terminal 143 and at the same time prevents separation or flow of the contact portion 251 in contact with the bus bar terminal 143, thereby maintaining an electrically stable contact. The shape of the first protrusion 141a is not limited, but it can be modified into various shapes to support both sides of the contact portion 251 .

FIG. 9 is an embodiment of the bus bar terminal 143 coupled to the power terminal 250 in FIG. 7 .

Referring to FIG. 9 , both sides of the bus bar terminal 143 contacting the contact portion 251 may have curved portions 143b. The curved portion 143b may be provided to form a shape with the contact surface of the contact portion 251 in contact with the curved surface.

The curved portion 143b may facilitate insertion of the contact portion 251 when the contact portion 251 is inserted into the bus bar terminal 143, and may maintain a stable coupling by increasing the contact area through molding.

FIG. 10 is a view showing a structure in which the motor housing 150 and the connector part 200 are connected in FIG. 2 .

Referring to FIG. 10 , the connector part 200 , which is a component of the present invention, may be disposed on the motor housing 150 . Various components such as a power terminal 250 , a board, and a Hall-IC are disposed in the connector unit 200 , and a position must be fixed when coupled to the motor unit 100 .

In the present invention, in order to fix the position of the connector part 200 , at least one hole 151a may be disposed in the motor housing 150 , and at least one second protrusion 231a is provided in the connector part 200 . can be provided. The positions of the hole 151a and the second protrusion 231a may be crossed between the connector part 200 and the motor housing 150 , the hole 151a is on the connector part 200 , and the protrusion is on the motor housing 150 . ) will be omitted.

A protrusion 151 may be provided on a side surface of the motor housing 150 . The protrusion 151 may be provided to extend from an upper portion of the motor housing 150 , and a hole 151a may be formed in one central region. The shape of the hole 151a is not limited, but may have the same cross-sectional shape as the second protrusion 231a so that the second protrusion 231a provided in the connector part 200 is inserted.

The connector connection part 230 may include a first connection part 231 and a second connection part 233 .

The first connection part 231 is connected to the side surface of the connector body 210 , and is disposed to face the protrusion part 151 when the connector connection part 230 and the motor housing 150 are coupled. At this time, the first connection part 231 may be provided with a second protrusion 231a , and the second protrusion 231a may be inserted into the hole 151a to fix the position of the connector part 200 .

In one embodiment, the second protrusion 231a may be provided in a cylindrical shape, and an inclined portion may be provided on the upper portion to facilitate insertion into the hole 151a.

In addition, a rib 231b may be provided in one area in the center of the first connection part 231 , and the second protrusion 231a may be disposed on the rib 231b. The rib 231b may be disposed as a separate structure or may be formed through a slimming structure in the basic structure. The rib 231b may be disposed in the longitudinal direction of the first connection part 231 to resist bending or distortion acting on the first connection part 231 .

A plurality of grooves 231c may be provided on both sides of the second protrusion 231a provided in the first connection part 231 . In one embodiment, the plurality of grooves 231c may be disposed at regular intervals, and may be disposed in a direction perpendicular to the direction of the rib 231b.

The second connection part 233 may be connected to the first connection part 231 to receive power from the outside. In an embodiment, the second connection part 233 may be connected to the first connection part 231 to have a predetermined angle. The connection angle between the second connection part 233 and the first connection part 231 can be modified according to the angle at which the second connection part 233 is installed to receive power.

11 is a view showing the first suction port 320 and the first discharge port 330 formed on the first cover 300 in FIG. 2, and FIG. 12 is formed on the second cover 500 in FIG. It is a view showing the second suction port 520 and the second discharge port 530 , FIG. 13 is a view showing the configuration of the pump unit 400 in FIG. 2 , and FIG. 14 is a view showing the pump unit in the first cover 300 . It is a view showing a state in which 400 is positioned, and FIG. 15 is a view showing a state in which the pump unit 400 is positioned in the second cover 500 .

11 to 15 , the pump unit 400 may be disposed between the first cover 300 and the second cover 500 .

The pump unit 400 is inserted between the second cover 500 and the first cover 300 to which the fluid is supplied, and receives power from the motor unit 100 to pump oil. The first cover 300 and the second cover 500 form a space in which the pump unit 400 is located through combination. The first cover 300 and the second cover 500 may be integrally connected to each other only as described separately according to functional characteristics.

One side of the first cover 300 may be in contact with the connector unit 200 , and the other side may include a first surface 310 accommodating the pump unit 400 .

The first surface 310 may include a first suction port 320 and a first discharge port 330 . The first suction port 320 and the first discharge port 330 may have a conventionally used port shape.

The second cover 500 includes a second surface 510 on which the pump unit 400 is disposed, and the second surface 510 includes a second suction port 520 and a second discharge port 530 . can The second suction port 520 may include a suction port 521 through which oil is introduced through communication with the second suction port 520 and an outlet port 531 through communication with the second discharge port 530 .

The second suction port and the second discharge port 530 may be formed to have an arc shape, and may be provided such that the distance from one side to the other becomes gradually narrower. In addition, the wide side of the second suction port 520 faces the wide side of the second discharge port 530 , and the narrow side of the second suction port 520 is the second discharge port 530 . It may be arranged to face a side with a narrow gap.

The second discharge port 530 may have a conventionally used shape.

The second suction port 520 may include a third protrusion 523 protruding inward. The third protrusion 523 may protrude toward the space forming the second suction port 520 at a farther away from the center of the first rotor 410 among the ends of the second suction port 520 .

The suction port and the discharge port are formed on the first cover 300 and the second cover 500 , respectively, and serve to induce the fluid to be smoothly sucked and discharged by the pump unit 400 . These suction ports and discharge ports are arranged to partition the space. This is to prevent the fluid from moving due to the pressure difference.

Referring to FIG. 13 , the pump unit 400 is disposed between the first cover 300 and the second cover 500 , and receives power from the motor unit 100 to pump the fluid. The pump unit 400 may include a first rotor 410 and a second rotor 120 . The first rotor 410 may be referred to as an inner rotor 120 , and the second rotor 430 may be referred to as an outer rotor 120 .

The first rotor 410 receives the rotational force directly from the motor unit 100 by coupling the rotating shaft 110 to the central portion. In one embodiment, the rotation shaft 110 has at least one cut surface 111 , and may be inserted into the third coupling hole 440 disposed at the center of the first rotor 410 . The third coupling hole 440 may be engaged with the inserted rotation shaft 110 to prevent the first rotor 410 from spinning when the rotation shaft 110 rotates.

The second rotor 430 is disposed outside the first rotor 410 . In addition, the first rotor 410 may be provided with a first lobe 411 having N gear teeth outward in the radial direction with respect to the center of rotation along the circumferential direction. In addition, the second rotor 430 may be provided with N+1 second lobes 431 facing inward in the radial direction. In this case, the second lobe 431 may be disposed to be caught by the first lobe 411 . As the first rotor 410 rotates, the second rotor 430 rotates in conjunction with each other.

On the other hand, the diameter of the dedendum circle (C1) of the first rotor 410 (hereinafter referred to as 'D1') and the diameter of the dedendum circle (C2) of the second rotor 430 (hereinafter referred to as 'D2') ) is the standard for forming a space for pumping oil.

In the present invention, it is possible to stably supply the flow of oil in a high-speed region by changing the shape of the suction port.

Referring to FIG. 14 , a structure in which the first suction port 320 formed on the first cover 300 and the first discharge port 330 contact each other is disclosed, and a conventional structure is used.

However, when the first cover 300 and the second cover 500 are coupled to each other, the first suction port 320 and the second suction port 520 , the first discharge port 330 and the second discharge port 530 . are placed facing each other. In this case, the first suction port 320 and the second suction port 520 may be disposed to have different shapes.

Referring to FIG. 15 , the first rotor 410 and the second rotor 430 may be disposed so that their centers do not coincide with each other. When the center P1 of the first rotor 410 and the center P2 of the second rotor 430 are projected on the second cover 500 , the center P1 of the first rotor 410 and the second rotor The angle formed by the first line L1 connecting the center P2 of the 430 and the second line L2 connecting the center P1 of the first rotor 410 and the end of the third protrusion 523 . can be inversely proportional to the number of gear teeth. The arrangement position of the third protrusion 523 may determine the flow rate and speed of the introduced fluid.

In an embodiment, the angle θ formed between the first line L1 and the second line L2 may be calculated by Equation 1 below.

Here, N means the number of gear teeth formed in the first rotor 410 .

The position of the end of the third protrusion 523 may be arranged according to an angle formed by the first line L1 and the second line L2 .

In one embodiment, when the first rotor 410 has five gear teeth as shown in FIG. 13 , θ may be set to 36 degrees.

In this case, θ may be deformed within the range of 5%.

The first line L1 and the third line L3 connecting the end of the second suction port 520 in an area adjacent to the third protrusion 523 may be disposed in parallel. At the end of the second suction port 520 , two recessed areas are formed at the end by the third protrusion 523 formed inside the second suction port 520 , and the third line L3 is the two recessed areas. connect the innermost side of

In addition, when the first line L1 and the third line L3 are parallel to each other, the interval d2 between the first line L1 and the third line L30 is the center P1 of the first rotor 410 . ) is proportional to the distance between the center P2 of the second rotor 430 and the second rotor 430 .

In an embodiment, the interval d2 between the first line L1 and the third line L3 may be calculated by Equation 2 below.

Here, e denotes a distance between the center P1 of the first rotor 410 and the center P2 of the second rotor 430 .

As a result, the arrangement position of the third protrusion 523 provided with the second suction port 520 is the number N of gear teeth of the first rotor 410 , the center P1 of the first rotor 410 , and the second rotor It may be determined by the distance e between the centers P2 of 430 .

16 is a view illustrating a change in flow rate performance when the shape of the second cover 500 of FIG. 15 is applied.

Referring to FIG. 16 , it can be seen that, in the conventional oil flow, when the flow rate is greater than 4000 rpm, the increase in the flow rate decreases, and when the flow rate exceeds 5000 rpm, it can be confirmed that the increase in the flow rate becomes very dull.

However, when the shape of the second cover 500 according to the embodiment of the present invention is applied, it is possible to secure a constant flow rate increase over 4000 rpm, and it can be confirmed that the flow rate increase is continuously maintained even over 5000 rpm.

As described above, the embodiments of the present invention have been described in detail with reference to the accompanying drawings.

The above description is merely illustrative of the technical idea of the present invention, and various modifications, changes, and substitutions are possible within the range that does not depart from the essential characteristics of the present invention by those of ordinary skill in the art to which the present invention pertains. will be. Accordingly, the embodiments disclosed in the present invention and the accompanying drawings are for explaining, not limiting, the technical spirit of the present invention, and the scope of the technical spirit of the present invention is not limited by these embodiments and the accompanying drawings . The protection scope of the present invention should be construed by the following claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present invention.

1: electric pump 100: motor unit
110: axis of rotation 111: cut surface
120: rotor 130: stator
131: coil 140: bus bar
141: bus bar body 141a: first projection
143: bus bar terminal 143a: connection terminal
143b: curved 150: motor housing
151: protrusion 151a: hole
200: connector part
210: connector body 211: first through hole
230: connector connection 231: first connection
231a: second projection 231b: rib
231c: groove 233: second connection part
250: power terminal 251: contact
300: first cover 310: first surface
320: first suction port 330: first discharge port
340: second through hole
400: pump unit 410: first rotor
411: first lobe 430: second rotor
431: second lobe 440: third coupling hole
500: second cover 510: second surface
520: second suction port 521: suction port
523: third protrusion 530: second discharge port
531: outlet

Claims (6)

a motor unit including a rotating shaft and a rotor coupled to the rotating shaft, a stator disposed outside the rotor, and a motor housing accommodating the rotor and the stator;
a connector part disposed on the motor part;
includes,
The motor unit includes at least one hole, and the connector unit includes at least one second protrusion inserted into the hole,
The end of the motor housing includes a protrusion having a predetermined area,
The connector part includes a connector body and a connector connection part disposed to face the protrusion,
The protrusion is provided with the hole, and the second protrusion is disposed on the connector connecting portion and inserted into the hole,
A plurality of grooves are arranged so that both sides of the connector connection part are symmetrical,
The second protrusion is an electric pump disposed between the grooves. delete According to claim 1,
The connector connection part
The electric pump comprising: a first connection part connected to a side surface of the connector body, on which the second protrusion is disposed; and a second connection part connected to have a predetermined angle from the first connection part. delete a motor unit including a rotating shaft and a rotor coupled to the rotating shaft, a stator disposed outside the rotor, and a motor housing accommodating the rotor and the stator;
a connector part disposed on the motor part;
includes,
The motor unit includes at least one hole, and the connector unit includes at least one second protrusion inserted into the hole,
The end of the motor housing includes a protrusion having a predetermined area,
The connector part includes a connector body and a connector connection part disposed to face the protrusion,
The protrusion is provided with the hole, and the second protrusion is disposed on the connector connecting portion and inserted into the hole,
The connector connection portion is formed with ribs in the longitudinal direction,
The second protrusion is an electric pump disposed on the rib. 6. The method of any one of claims 1, 3 and 5,
The second protrusion is provided in the shape of a cylinder,
An electric pump in which an inclined surface is disposed along a circumference at an upper end of the second protrusion.

Images