CN116255339A - electric pump - Google Patents

Abstract

In a technical solution provided by the present application, the first housing is injection-molded with the stator assembly as an insert and is injection-molded and fixed with the stator assembly, and forms a pin hole for placing a pin, which is conducive to simplifying the pump housing, the stator assembly and the insertion. Needle fixation.

Description

electric pump

technical field

The invention relates to a fluid pump, in particular to an electric pump.

Background technique

The electric pump includes a stator assembly, a pump housing, and pins. The pins are used to connect with the outside world to provide energy, drive signals, or control signals for the electric pump. The fixing of the pump housing, stator assembly, and pins is relatively complicated, providing a It is a technical problem to find a simple fixing method of the pump housing, the stator assembly and the pins.

Contents of the invention

The purpose of the present application is to provide an electric pump, which is beneficial to simplify the fixing of the pump housing, the stator assembly and the pins.

In order to achieve the above object, an embodiment of the present application adopts the following technical solution: an electric pump, including a stator assembly, a first housing, and pins, the stator assembly includes a stator core, an insulating frame, and a winding, the The insulating frame covers at least part of the surface of the stator core, and the winding wire of the winding is wound on the insulating frame; the first casing covers at least part of the stator assembly, and the first casing at least The stator assembly is used as an insert for injection molding to fix the stator assembly, the first housing has an injection-molded pin hole, the fixing part of the pin is located in the pin hole, and the winding It is fixed and electrically connected with the wire hanging part of the pin.

In a technical solution provided by the present application, the first housing is injection-molded with the stator assembly as an insert and is injection-molded and fixed with the stator assembly, and forms a pin hole for placing a pin, which is beneficial to simplify the pump housing, the stator assembly and the insertion Needle fixation.

Description of drawings

Fig. 1 is a kind of sectional structure schematic diagram of the first embodiment of the electric pump of the present invention;

Fig. 2 is a schematic diagram of an exploded structure of the electric pump in Fig. 1;

Fig. 3 is a schematic front view of the motor in Fig. 1;

Fig. 4 is a schematic sectional view along A-A of Fig. 3;

Fig. 5 is a structural schematic diagram of a viewing angle of the first casing;

Fig. 6 is a structural schematic diagram of another viewing angle of the first housing;

Fig. 7 is a three-dimensional structural schematic diagram of a stator assembly;

Fig. 8 is a structural schematic diagram of a combination of the stator assembly and the inner casing;

Fig. 9 is a structural schematic diagram of another viewing angle of the combination of the stator assembly and the inner casing;

Fig. 10 is a schematic diagram of a three-dimensional structure of a pin;

Fig. 11 is a schematic diagram of cooperation of the first housing, pins and windings;

Fig. 12 is a schematic cross-sectional structure diagram of a second embodiment of the electric pump of the present invention;

Fig. 13 is a schematic structural view of Fig. 12 when the second housing is removed;

Fig. 14 is a schematic view of the structure of Fig. 13 with the joint portion removed.

Detailed ways

The present invention will be further described below in conjunction with accompanying drawing and specific embodiment:

The electric pump in the following embodiments can provide flow power for the working medium of the automobile thermal management system. The working medium can be 50% ethylene glycol aqueous solution or clear water, and of course the working medium can also be other substances.

1-4, the electric pump 1000 includes a pump housing 1100, a rotor assembly 1200, a stator assembly 1300, and a pump shaft 16. At least part of the rotor assembly 1200 is sleeved on the outer circumference of the pump shaft 16, and the rotor assembly 1200 and the pump shaft 16 rotate Connection; the pump housing 1100 can form a pump cavity 1010, the rotor assembly 1200 is located in the pump cavity 1010, the pump cavity 1010 includes a rotor cavity 1011 and an impeller cavity 1012, and the rotor cavity 1011 and the impeller cavity 1012 communicate; the rotor assembly 1200 includes a rotor 1220 and the impeller 1210 , in this embodiment, the rotor 1220 includes permanent magnets, wherein at least part of the rotor 1220 is located in the rotor cavity 1011 , and the impeller 1210 is located in the impeller cavity 1012 . When the electric pump 1000 is working, by controlling the current of the stator assembly 1300 and then controlling the excitation magnetic field generated by the stator assembly 1300, the rotor assembly 1200 rotates around the pump shaft 16 under the action of the excitation magnetic field.

7, the stator assembly 1300 includes a stator core 1310, an insulating frame 1320 and a winding 1330, the number of windings 1330 is at least three, the insulating frame 1320 covers at least part of the surface of the stator core 1310, and the winding 1330 is wound on the insulating frame 1320. In a specific embodiment, the stator assembly 1300 includes nine windings 1330. Of course, the stator assembly 13002 may also include other numbers of windings 1330, such as three or six or twelve. Referring to Fig. 4, Fig. 7, Fig. 8, and Fig. 9, in this embodiment, a first assembly is defined. The first assembly includes a stator core 1310, an insulating frame 1320, and a winding 1330, and the insulating frame 1320 covers the stator core. On at least part of the surface of the winding 1310 , the winding wire of the winding 1330 is wound on the insulating frame 1320 . The stator assembly includes an inner housing 100. The inner housing 100 is formed by insert injection molding at least with the first assembly body. The inner housing 100 covers the stator core 1310, the insulating frame 1320 and the winding 1330 wound on the insulating frame 1320. Here, The inner housing 100 described above is an injection molded body. The inner casing 100 has a rotor cavity 1011, or in other words, the walls forming the rotor cavity 1011 include the walls of the inner casing 100, or the inner casing 100 isolates the first assembly and the rotor cavity 1011, so that the fluid in the rotor cavity 1011 and the second Isolation of an assembly. Of course, the pump shaft 16 can also be fixed with the inner housing 100 by injection molding, or in other words, the inner housing 100 can also be the first assembly and the pump shaft 16 as an insert injection molding, and the inner housing 100 has an assembly for accommodating part of the pump shaft 16. hole, here the pump shaft 16 and the inner casing 100 are injection molded and fixed, and the assembly hole of the pump shaft 16 described here can be a through hole or a blind hole. In this embodiment, the pump shaft 16 includes a The first fixing section 161 , the second fixing section 162 protruding from the pump casing 1100 , and the first end fixed to the rotor assembly 1200 , correspondingly, the inner casing 100 has a first assembly hole 110 for accommodating the first fixing section 161 , the first fixing section 161 is injection molded and fixed to the inner casing 100 . Here, the first end part includes a distance extending inward from the end surface. The "injection molding" here can be one injection molding, two injection moldings or more than two injection moldings, so that a set of molds can realize the inner shell 100, which helps to save costs.

7 to 8, the electric pump 1000 also includes a conductive member 1500, the conductive member 1500 includes a first connecting section 1510 and a second connecting section 1520, wherein the second connecting section 1520 is needle-shaped, and the second connecting section 1520 is used for To connect with the outside world, in this embodiment, the first connecting section 1510 of the conductive member 1500 is in contact with the stator core 1310, which is used for grounding the stator assembly 1300, which is beneficial to reduce the influence of the accumulated charge on the electric pump 1000, and is also beneficial to The electromagnetic compatibility of the electric pump 1000 is improved. Referring to FIG. 7 , in this embodiment, the conduction member 1500 is an integral part, of course, the conduction member 1500 may also consist of two parts or more than two parts. The conductive member 1500 includes a first injection molding section 1540, which is connected to the first connecting section 1510, and the inner housing 100 has a first injection molding hole through which the first injection molding section 1540 passes, and the first injection molding hole is formed by a first injection molding The section 1540 is formed by an insert, the first connecting section 1510 of the conducting element 1500 is located in the inner casing 100 , and a part of the conducting element 1500 , such as the second connecting section 1520 , is exposed outside the inner casing 100 . The conductive member 1500 also includes a connecting portion 1530, which is located on different sides of the inner housing 100 along the axial direction of the electric pump 1000, and the connecting portion 1530 is connected to the first injection section 1540, and the extending direction of the connecting portion 1530 is aligned with the axis of the electric pump 1000. Vertically, the conductive member 1500 is provided with a connecting portion 1530 for changing the protruding position of the second connecting section 1520. In this embodiment, along the radial direction of the electric pump 1000, the second connecting section 1520 is closer to the pump axis than the first connecting section 1510 16.

Referring to Fig. 7, the winding wire of the winding 1330 includes a first segment 1331, a second segment 1332 and a third segment 1333, wherein the second segment 1332 is located between the first segment 1331 and the third segment 1333, and the first segment 1331 is wound In the insulating frame 1320, the inner casing 100 has a second injection hole formed with the winding wire of the winding 1330 as an insert, or in other words, the winding is one of the inserts formed by injection molding of the inner casing 100, and the inner casing 100 has a The winding wire protrudes from the second injection hole of the inner casing 100 , wherein the second section 1332 and the third section 1333 of the winding wire are exposed to the inner casing 100 , or the winding wire has a part protruding from the inner casing 100 .

Please refer to Figure 2, Figure 11 and Figure 4. The electric pump 1000 also includes a first housing 200 and pins 1400. The first housing 200 is fixedly connected to the stator assembly 1300. Specifically, the first housing 200 is fixedly connected to the stator assembly 1300 through the inner housing 100. The first housing The body 200 is fixedly connected with the pin 1400, the first housing 200 has a winding hole 240, the second section 1332 of the winding is located in the winding hole 240, the third section 1333 is exposed to the first housing 200, and the third section 1333 The connecting section is fixed and electrically connected to the wire hanging portion 1430 of the pin 1400 , and the stator core 1310 and the wire hanging portion 1430 of the pin 1400 are located on different sides of the first housing 200 . In this way, the winding wire of the winding 1330 passes through the first housing 200, and then is fixed and electrically connected with the wire hanging part 1430 of the pin 1400, and the pin 1400 is fixedly connected with the first housing 200, which can simplify the winding of the winding 1330 The connection with the pin 1400 is convenient for assembly and also helps to simplify the structure of the electric pump 1000 .

In a specific embodiment, please refer to FIG. 6 , FIG. 8 and FIG. 11 , the first housing 200 has a wire winding hole 240, the second section 1332 of the winding wire is located in the wire winding hole 240, and the third section 1333 of the winding wire The first housing 200 is bare and the first housing 200 is injection molded and fixed to the stator assembly 1300 , specifically, the first housing 200 is injection molded and fixed to the inner housing 100 and then fixed to the stator assembly 1300 by injection molding, and the second section 1332 of the winding wire It is fixed with the first housing 200 by injection molding, and the winding hole 240 is formed by injection molding with the second section 1332 of the winding as an insert. The conduction member 1500 includes a second injection molding section 1550, and the first housing 200 has a conduction hole 280 through which the second injection molding section 1550 passes. Since the connecting portion 1530 protrudes from the inner housing 100, the first housing 200 forms a There is a receiving groove 260 for accommodating the connecting part 1530; in addition, since the extending direction of the connecting part 1530 is perpendicular to the axial direction of the electric pump 1000, in order to prevent the connecting part 1530 from moving during injection molding, the second tooling is used to press the connecting part 1530. When the first housing 200 is formed by injection molding, it is an insert. After the injection molding of the first housing 200 is completed, the first housing 200 has a first accommodating hole 250 for accommodating the second tooling. The first accommodating hole runs through the first housing. A through hole has an opening on the wall forming the receiving groove. Since the second fixing section 162 of the pump shaft protrudes from the inner casing 100, the pump shaft 16 is also used as an insert when the first casing 200 is injection-molded, and the second fixing section 162 is fixed to the first casing 200 by injection molding. The housing 200 has a second assembly hole 270 for receiving the second fixing section 162 . In this way, the second fixed section 162 of the pump shaft 16 is fixed to the first casing 200 by injection molding, and the inner casing 100 of the first fixed section 161 of the pump shaft 16 is fixed by injection molding, which is conducive to enhancing the fixing strength of the pump shaft 16 and the pump casing 1100 .

Please refer to Fig. 1-Fig. 4 and Fig. 8, the pump housing 1100 also includes a pump cover 1110, the pump cover 1110 is sealed and fixed with the first housing 200, the pump cover 1110 has an impeller cavity 1012, an inlet and an outlet, and the inlet and the outlet are respectively In communication with the impeller cavity 1012, the impeller 1210 is located in the impeller cavity 1012. In this embodiment, along the axial direction of the electric pump 1000, the outer wall of the inner housing 100 includes a first side wall 120 and a second side wall 130, wherein the first The side wall 120 is inserted into the first casing 200 during injection molding, or in other words, the first side wall 120 is wrapped in the first casing 200 , and the second side wall 130 is located in the impeller cavity 1012 . The first casing 200 includes a bottom 210 and a side portion 220, wherein the bottom 210 of the first casing 200 has a winding hole 240, a pin hole 230 and a third injection hole for the conductive member to pass through, along the axial direction of the electric pump 1000 , the side portion 220 extends from the bottom 210 toward the pump cover 1110 , the side portion 220 surrounds the first side wall 110 of the stator assembly 1300 , and the side portion 220 is sealingly connected with the first side wall 110 of the stator assembly 1300 . The first casing 200 also includes a first sealing portion, and the pump cover 1110 includes a second sealing portion, the first sealing portion and the second sealing portion are sealed and fixed, and the fixing methods include welding, bonding, etc., and the welding methods include laser welding, friction, etc. Welding and ultrasonic welding will not be described in detail; alternatively, the electric pump 1000 includes seals, the seals are respectively abutted against the first sealing part and the second sealing part, and the pump cover 1110 is fixedly connected to the first housing 200 by bolts. This helps to prevent fluid leakage in the pump lumen 1010 . In order to enhance the sealing, further, at least one of the first housing 200 and the first side wall 110 is provided with several recesses, the extending direction of the recesses intersects the axial direction of the electric pump 1000, preferably, the extending direction of the recesses is parallel to the direction of the electric pump 1000 The axial direction of 1000 is vertical. It can be known that when the first housing 200 is injected with the inner housing 100 as an insert, the other of the first housing 200 and the first side wall 110 is a convex part, and these convex parts and concave parts cooperate with each other. , not only the sealing performance between the inner housing 100 and the first housing 200 can be enhanced, but also the fixing strength between the inner housing 100 and the first housing 200 can be enhanced.

The first housing 200 also includes a mounting portion 201 for mounting the electric pump 1000 , specifically, the mounting portion 201 has several holes, which may be threaded holes or through holes, and will not be described in detail.

Please refer to FIG. 2 , FIG. 10 and FIG. 11 , the insertion pin 1400 includes a fixing part 1410 , a thread-hanging part 1430 and a needle part 1420 , and along the axial direction of the electric pump 1000 , the thread-hanging part 1430 is located between the needle part 1420 and the fixing part 1410 , the fixing part 1410 of the pin 1400 is closer to the stator core 1310 than the hanging part 1430 of the pin 1400, and the fixing part 1410, the hanging part 1430 and the needle part 1420 can be a one-piece structure or three separate structures fixed by welding. The first housing 200 has a pin hole 230. The pin hole 230 can be injection molded with the first tooling as an insert when the first housing 200 is injected. The pin hole 230 can also be machined. The pin hole 230 can be Through the first housing 200, it can also be a blind hole. The fixing part 1410 of the pin 1400 is located in the pin hole 230, and the opening of the pin hole 230 faces away from the stator core 1310. Wall interference fit, the pin 1400 can also be fixed by bonding the first housing 200, the fixing of the pin 1400 and the first housing 200 can reduce the damage when the electric pump 1000 is formed, if it can prevent the winding wire from breaking, it can also It facilitates the positioning of the pin 1400. In a specific embodiment, the fixing part 1410 of the pin 1400 includes a toothed part 1411 and a raised part 1412, wherein the raised part 1412 protrudes relative to the toothed part 1411, and along the axial direction of the electric pump 1000, the raised part 1412 is closer to the stator core 1310 than the toothed portion 1411 , the toothed portion 1411 is located in the pin hole 230 , and part of the protruding portion 1412 is located in the pin hole 230 , and the protruding portion 1412 has the function of limiting the pin 1400 . The hanging part 1430 includes an extension part 1431 and a bending part 1432. The extension part 1431 connects the fixing part 1410 and the needle part 1420. The bending part 1432 is bent relative to the extension part 1431. There is a third section of the receiving part between the bending part 1432 and the extension part 1431. 1333, the connection end of the third section 1333 is fixed and electrically connected to the wire hanging portion 1430. In a more specific embodiment, along the axial direction of the electric pump 1000 , the winding hole 240 runs through the first housing 200 , and the stator core 1310 and the wire-hanging part 1430 of the pin 1400 are located on the opposite side of the first housing 200 On both sides, the needle portion 1420 includes a vertical section 1421. The extension direction of the vertical section 1421 is parallel to the axial direction of the electric pump 1000. Compared with the vertical or other angles between the needle portion 1420 and the axial direction of the electric pump 1000, the size of the electric pump 1000 can be reduced. radial size. In addition, referring to Fig. 12 and Fig. 13, the needle part 1420 may also include a vertical section 1421 and a horizontal section 1422, wherein the extending direction of the vertical section 1421 is parallel to the axial direction of the electric pump 1000, and the extending direction of the horizontal section 1422 is parallel to the axial direction of the electric pump 1000. The axial direction of 1000 is vertical. Along the axial direction of electric pump 1000, the vertical section 1421 is closer to the hanging part 1430 than the horizontal section 1422. In this way, the direction of the joint part 400 of the electric pump 1000 can be adjusted according to actual needs, which is convenient for installation and improves the electric pump 1000. applicability.

Referring to Fig. 2, Fig. 12 and 13, the electric pump 1000 includes a second casing 300, the second casing 300 is formed by injection molding at least with pins 1400 and conductive elements 1500 as inserts, and the third section 1333 of the winding wire is also located at In the second housing 300, the second housing 300 is fixed with the pin 1400 and the first housing 200 by injection molding. It can be known that the second housing 300 and the first housing 200 are fixedly connected by injection molding; the second housing 300 The joint part 400 is included, and the joint part 400 is used for connecting with the outside world. The joint part 400 has an accommodating cavity 410 , at least part of the needle part 1420 is located in the accommodating cavity 410 , and the needle part of the second connection section is located in the accommodating cavity 410 . In a specific embodiment, the pin 1400 only includes the vertical section 1421, and the joint part 400 is formed by injection molding. Of course, the joint part 400 can also be an insert. During injection molding, the joint part 400 is an insert, and the second housing 300 is The joint portion 400, the pin 1400, and the conductive member 1500 are injection molded. In another specific embodiment, the pin 1400 includes a vertical section 1421 and a horizontal section 1422. At this time, the joint part 400 is a separate structure from the second housing 300, the joint part 400 is an insert, and the joint part 400 and the second housing 300 injection fixed.

In the above embodiment, the inner housing 100 is injection molded with the first assembly as an insert, the first assembly and the inner housing 100 are fixed by injection molding, the first housing 200 and the inner housing 100 are fixed by injection molding, and the second housing 300 The third section 1333 of the winding wire and the conductive element 1500 are used as insert injection molding. In yet another embodiment of the electric pump 1000, the pump housing 1100 may not include the first housing 200, and the pin hole 230 is formed when the inner housing 100 is injected, and the pin 1400 is fixed to the inner housing 100, and the second housing The body 300 is injection-molded with the pin 1400 and the conductive element 1500 as inserts, and will not be described in detail.

It can be known that the pump housing 1100 includes a pump cover 1110 , a first housing 200 and a second housing 300 , and the stator assembly includes an inner housing 100 , wherein the inner housing 100 , the first housing 200 and the second housing 300 Injection molding defines the inner casing 100, the first casing 200 and the second casing 300 as injection molding bodies, so that the electric pump 1000 includes a rotor assembly 1200, a stator assembly 1300, pins 1400 and an injection molding body, and the injection molding body is at least composed of a stator The assembly 1300 and pin 1400 are formed by insert injection molding, the injection molding body covers the stator assembly 1300, the electric pump 1000 has a rotor cavity 1011, the wall forming the rotor cavity 1011 includes the inner wall of the injection molding body, at least part of the rotor assembly 1200 is located in the rotor cavity 1011, The electric pump 1000 includes a joint part 400 , which is integrated with the injection molded body or fixed by injection molding. The needle part 1420 of the insertion pin 1400 is located in the accommodating cavity 410 of the joint part 400 . The injection molded body can be formed by one injection molding, or by two or more injection moldings. For example, in this embodiment, the injection molded body is formed by three injection moldings, and the inner shell 100 is formed by the first injection molding, which is defined as the first injection molded body. The shell 200 is the second injection molding, defined as the second injection molding body, and the second housing 300 is the third injection molding, and is defined as the third injection molding body. The stator assembly 1300 and the pin 1400 are fixed by injection molding, the pump cover 1110 is sealed and fixed with the injection molding body, a part of the rotor assembly 1200 is located in the injection molding body, and the other part of the rotor assembly 1200 is located in the pump cover 1110. Such an electric pump 1000 is simple in structure and runs Matching is also relatively simplified. The injection-molded body can also be injection-molded twice, and the first shell 200 may not be needed, only the inner shell 100 and the second shell 300 need to be injection-molded separately, which will not be described in detail.

In another embodiment, the first housing 200 may also be fixed to the inner housing 100 after injection molding, and the fixing method may be bonding or bolting, which will not be described in detail.

An embodiment of the present application also provides an assembly method of the electric pump 1000, which is applied to the electric pump 1000. The electric pump 1000 includes a stator assembly 1300, pins 1400, a rotor assembly 1200, and a pump housing 1100. The pump housing 1100 includes an injection molded body With the pump cover 1110, the assembly method of the electric pump 1000 includes:

forming an injection molded body with the stator assembly 1300 and pins 1400 as inserts;

Place the rotor assembly 1200 in the rotor cavity 1011 of the injection molding body;

Fixedly connect the pump cover 1110 and the injection molded body.

The injection molded body is formed with the stator assembly 1300 and pins 1400 as inserts, and at the same time forms the rotor cavity 1011. After placing the rotor assembly 1200 in the rotor cavity 1011, it is fixedly connected with the pump cover 1110. The assembly method of the above-mentioned electric pump 1000 is relatively simple. The structure of the electric pump 1000 is also relatively simple.

In this embodiment, the injection molded body includes a first injection molded body, a second injection molded body and a third injection molded body, and the injection molded body formed with the stator assembly 1300 and the pin 1400 as an insert at least includes:

The stator assembly 1300 is used as insert molding to form the first injection molding body; or, the stator assembly 1300 and the pump shaft 16 are used as insert injection molding to form the first injection molding body; or, the electric pump 1000 includes a conductive member 1500, and the first injection molded body of the conductive member 1500 The connecting section 1510 is in contact with the stator core 1310, and the stator assembly 1300, the pump shaft 16, and the conductive member 1500 are used as insert injection molding to form a first injection molding body;

Injection molding forms the second injection molded body; specifically, the second injection molded body is formed with the winding wire and the conductive member 1500 as an insert; thus, the second injection molded body has a winding hole 240 for the winding wire to pass through, and the second injection molded body has a winding hole 240 for the wire to pass through. The third injection hole through which the conductive member 1500 passes; when the pump shaft 16 has a part protruding from the first injection molding body, the protruding part of the pump shaft 16 is also an insert forming the second injection molding body;

Further, forming the second injection molded body by injection molding also includes: forming the pin hole 230 with the first tooling as an insert, and forming the first receiving hole 250 with the second tooling as an insert; wherein the second tooling is used to limit the conductive member 1500 The connecting part 1530 prevents the connecting part 1530 from moving when the first casing 200 is injected.

The second injection molded body and the first injection molded body can be fixed during injection molding; or the second injection molded body can be formed first, and then the second injection molded body can be fixedly connected with the first injection molded body, and the fixing methods include welding, bonding or bolting.

Injection molding to form a third injection molding body, specifically, using the pin 1400 and the conductive member 1500 as insert injection molding to form a third injection molding body;

Before the third injection molded body is formed by injection molding, the assembly method of the electric pump 1000 includes: fixing the pin 1400 to the pin hole 230 , and fixing the winding to the thread hanging part 1430 of the pin 1400 .

When the pin 1400 includes the vertical section 1421 , the injection molding to form the second injection molding body includes the injection molding joint part 400 .

When the pin 1400 includes a vertical section 1421 and a horizontal section 1422, the assembly method of the electric pump 1000 further includes: forming the joint part 400;

At this time, the injection molding of the second injection-molded body includes: forming the second injection-molded body by insert-molding the joint part 400 , the pin 1400 and the conductive member 1500 as inserts.

It should be noted that the above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. Although the specification has described the present invention in detail with reference to the above-mentioned embodiments, those of ordinary skill in the art It should be understood that those skilled in the art can still make modifications or equivalent replacements to the present invention, and all technical solutions and improvements that do not depart from the spirit and scope of the present invention shall be covered by the claims of the present invention.

Claims (8)

1. The electric pump comprises a stator assembly, a first shell and a contact pin, wherein the stator assembly comprises a stator core, an insulating frame and a winding, the insulating frame is coated on at least part of the surface of the stator core, and a winding wire of the winding is wound on the insulating frame; the first shell covers at least part of the stator assembly, the first shell is at least fixed by injection molding with the stator assembly as an insert, the first shell is provided with an injection molding pin hole, the fixing part of the pin is positioned at the pin hole, and the winding wire is fixed with the wire hanging part of the pin and electrically connected with the wire hanging part of the pin.

2. The electric pump of claim 1, wherein the winding, including the winding wire of the winding, includes a first segment, a second segment, and a third segment, the first segment being wound around the insulating frame; the first shell is provided with a winding hole formed by insert molding by taking the second section as an insert, and the connecting section of the third section is fixed with the wire hanging part of the contact pin and is electrically connected with the wire hanging part of the contact pin.

3. The electric pump according to claim 2, further comprising a conductive member including a first connection section, a second injection-molded section, and a connection portion, the injection-molded section being connected with the connection portion and the second connection section, the first connection section being in contact with the stator core, the first housing having a conductive hole formed with the second injection-molded section as an insert, an extending direction of the connection portion being perpendicular to an axial direction of the electric pump, the first housing having a receiving groove formed with the connection portion as an insert injection molding, the first housing having a first receiving hole penetrating the first housing, the first receiving hole having an opening at a wall forming the receiving groove.

4. The electric pump according to claim 3, wherein the first housing includes a bottom portion having the winding hole, the pin hole, and the conduction hole, and a side portion extending from the bottom portion in an axial direction of the electric pump;

the stator assembly comprises an inner shell, the inner shell is formed by insert injection molding of the stator core, the insulating frame and the winding, the inner shell comprises a first side wall, the side part surrounds the first side wall, and the side part is in sealing connection with the first side wall of the stator assembly.

5. The electric pump according to any one of claims 1 to 4, wherein the electric pump comprises a second housing, the second housing is injection-molded and fixed with the bottom of the first housing, and the second housing is injection-molded with at least the pin and the second connection section of the conductive member as inserts; the electric pump further comprises a joint part which is a part of the second shell or is fixed with the second shell in an injection molding mode, the joint part is provided with a containing cavity, and the needle part of the contact pin and the needle section of the second connecting section of the conducting piece are located in the containing cavity.

6. The electric pump according to claim 5, wherein the needle portion includes a vertical section extending in a direction parallel to an axial direction of the electric pump, the joint portion is a part of the second housing, the joint portion is insert-molded with the needle portion, and an opening direction of the accommodation chamber is parallel to the axial direction of the electric pump;

or, the needle part comprises a vertical section and a horizontal section, the extending direction of the vertical section is parallel to the axial direction of the electric pump, the extending direction of the horizontal section is perpendicular to the axial direction of the electric pump, the joint part is fixed with the second shell in an injection molding way, the second shell is formed by injection molding of the needle part and the insert, and the opening direction of the accommodating cavity is perpendicular to the axial direction of the electric pump.

7. The electric pump of claim 6, comprising a pump shaft including a first fixed section and a second fixed section, the second fixed section being closer to the first housing than the first fixed section, the second fixed section protruding toward the first housing relative to the inner housing, the first housing being injection molded with the second fixed section.

8. The electric pump of claim 7, including a pump cover sealingly secured to the first housing, the rotor assembly including an impeller fixedly connected to the rotor assembly, the pump cover having an outlet and an interface, the pump cover having an impeller cavity, the outlet, the inlet being in communication with the impeller cavity, at least a portion of the impeller cavity being located in the impeller cavity.

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