Electric pump

Abstract

The electric pump comprises a rotating assembly, a thrust part and a shaft, the rotating assembly comprises a bearing and a rotor, the bearing is fixedly connected with the rotor, the bearing is provided with a matching hole, part of the shaft is located in the matching hole, the part, located in the matching hole, of the shaft is defined as a mounting part, the mounting part is in transmission fit with the bearing, the electric pump comprises a partition part, and the partition part comprises a partition face. The anti-thrust part comprises an anti-thrust face, the partition part and the bearing are both located on one side of the anti-thrust part in the axial direction of the electric pump, the partition part is close to the anti-thrust face relative to the bearing, and in the operation process of the electric pump, the partition face makes contact with the anti-thrust face. Therefore, the influence of heat generated by contact abrasion of the partition part and the thrust part on the bearing is reduced, the deformation of the bearing is reduced, and the blockage of the electric pump is reduced.

Description

[Technical field]

[0001] The present application relates to the field of fluid control, and in particular to an electric pump. [Background technology]

[0002] The electric pump includes a rotor assembly and a thrust part. The rotor assembly includes a bearing and a rotor. The bearing is fixedly connected to the rotor. The bearing and the thrust part form a thrust structure for limiting the axial movement of the rotor assembly. During the operation of the electric pump, friction and heat are generated by the friction between the thrust part and the bearing. The bearing is easily deformed by heat, and the electric pump is easily stuck. [Contents of the utility model]

[0003] The utility model aims to provide an electric pump, which is beneficial to reducing the jamming of the electric pump.

[0004] To achieve the above-mentioned purpose, an implementation method provided by the present application adopts the following technical scheme: an electric pump, the electric pump includes a rotating component, a thrust part and a shaft, the rotating component includes a bearing and a rotor, the bearing is fixedly connected to the rotor, the bearing has a matching hole, part of the shaft is located in the matching hole, the part of the shaft located in the matching hole is defined as a mounting part, the mounting part is matched with the bearing in transmission, the electric pump includes a partition, the partition includes a partition surface, the thrust part includes a thrust surface, along the axial direction of the electric pump, the partition and the bearing are both located on one side of the thrust part, the partition is close to the thrust surface relative to the bearing, and during the operation of the electric pump, the partition surface is in contact with the thrust surface.

[0005] In one embodiment of the present application, the electric pump includes a partition, and the thrust portion includes a thrust surface. Along the axial direction of the electric pump, the partition and the bearing are both located on one side of the thrust portion, and the partition is close to the thrust surface relative to the bearing. During the operation of the electric pump, the partition surface contacts the thrust surface, and the partition separates the bearing from the thrust portion. This is beneficial to reducing the heat generated by the contact between the partition and the thrust portion and affecting the bearing, thereby reducing the deformation of the bearing, and further reducing the jamming of the electric pump.

Brief Description of the Drawings

[0006] Figure 1 It is a three-dimensional structural schematic diagram of a first embodiment of the electric pump of the present application;

[0007] Figure 2 yes Figure 1 A schematic structural diagram of the first embodiment of the electric pump along the XX section;

[0008] Figure 3 yes Figure 2 The enlarged structural diagram at position I in the middle;

[0009] Figure 4 yes Figure 1 A schematic diagram of the structure of the second embodiment of the electric pump along the XX section;

[0010] Figure 5 yes Figure 4 The enlarged structural diagram at II in the middle;

[0011] Figure 6 yes Figure 2 and Figure 4 A schematic diagram of the three-dimensional structure of the middle pump cover in one direction;

[0012] Figure 7 yes Figure 2 and Figure 4 A schematic diagram of the three-dimensional structure of the middle stop thrust part in one direction;

[0013] Figure 8 yes Figure 2 and Figure 4 A schematic diagram of the three-dimensional structure of the middle contact portion in one direction;

[0014] Fig. 9 It is a current technical solution for electric pumps;

[0015] Fig.10 yes Fig. 9 The enlarged structural diagram at I' in the middle;

[0016] Fig.11 yes Figure 2 and Figure 4 A schematic diagram of the three-dimensional structure of the stator winding in the electric pump in one direction;

[0017] Fig.12 yes Figure 2 and Figure 4 A schematic diagram of the three-dimensional structure of the first component of the electric pump in one direction;

[0018] Fig.13 yes Fig.12 The schematic diagram of the structure of the stator assembly along the YY section;

[0019] In the accompanying drawings: 100, electric pump;

[0020] 11. Pump cover; 111. Inlet; 112. Outlet; 113. Thrust portion; 1131. Support portion; 1132. Contact portion; 1132a. Fixing portion; 1132b. Extending portion; 1132c. Thrust surface; 114. Pump housing;

[0021] 12. stator assembly; 121. stator housing; 1211. first housing; 1212. second housing;

[0022] 122, stator winding; 1221, stator core; 1222, insulation frame; 1223, winding;

[0023] 13, inner cavity; 131, rotor cavity; 132, impeller cavity;

[0024] 14, rotating assembly; 141, rotor assembly; 1411, rotor; 1412, bearing; 142, impeller assembly; 1412a, matching hole;

[0025] 16, shaft; 161, mounting portion; 162, partition; 163, first limiting portion; 164, second limiting portion; 17, partition; 171, partition surface; 172, partition hole;

[0026] 18. The first one;

[0027] 19. Control panel assembly;

[0028] 22. The first component. [Specific implementation method]

[0029] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments:

[0030] The specific implementation methods of the present application are further described in detail below in conjunction with the accompanying drawings. First of all, it should be noted that the directional terms such as up, down, left, right, front, back, inside, outside, top, bottom, etc. mentioned or may be mentioned in the specification of the present invention are defined relative to the structure shown in the corresponding drawings. They are relative concepts, and therefore may change accordingly according to their different locations and different usage states. Therefore, these or other directional terms should not be interpreted as restrictive terms.

[0031] The electric pump in the following embodiments can provide flow power for the working medium of the automotive thermal management system. The working medium may be water or an aqueous solution, such as an aqueous solution including 50% ethylene glycol. Of course, the working medium may also be other substances.

[0032] See also Figures 1 to 13As shown, the present application provides an electric pump 100, which includes a pump cover 11, a stator assembly 12, a rotating assembly 14 and a shaft 16; the stator assembly 12 includes a stator winding 122 and a stator housing 121, and the stator winding 122 includes a stator core 1221, an insulating frame 1222 and a winding 1223. The pump cover 11 is sealed and fixedly connected to the stator assembly 12. It should be noted that the sealing and fixing here means that when the electric pump 100 is working, the working medium in the electric pump 100 will not leak to the outside of the electric pump 100 through the joint surface between the pump cover 11 and the stator assembly 12. The shaft 16 is fixedly connected to the stator assembly 12. Specifically, the shaft 16 is fixed to the stator housing 121 by injection molding. It can be understood that part of the shaft 16 is embedded in the stator housing 121. The electric pump 100 has an inner cavity 13, and the rotating assembly 14 is located in the inner cavity 13. The inner cavity 13 includes a rotor cavity 131 and an impeller cavity 132, and the rotor cavity 131 and the impeller cavity 132 are connected. The inner cavity 13 can have a working medium flowing through it. The rotating assembly 14 includes a rotor assembly 141 and an impeller assembly 142, and the rotor assembly 141 includes a permanent magnet. At least part of the rotor assembly 141 is located in the rotor cavity 131, and the impeller assembly 142 is located in the impeller cavity 132. In a specific embodiment, the other end of the shaft 16 is at least partially located in the rotor cavity 131, at least part of the rotating assembly 14 is sleeved on the outer periphery of the shaft 16, and part of the shaft 16 is fixed to the stator housing 121, and the rotating assembly 14 can rotate around the shaft 16. Of course, as other embodiments, the rotating assembly 14 and the shaft 16 are fixedly connected, and the shaft 16 rotates with the rotating assembly 14. The electric pump 100 may also include a control board assembly 19, and the control board assembly 19 is electrically connected to the stator assembly 12. As other embodiments, the electric pump may not include the control board assembly, and the control board assembly is integrated in the external structure, which is conducive to the miniaturization design of the electric pump. In this embodiment, the electric pump includes a control board assembly. The pump cover 11 has an inlet 111 and an outlet 112. The inlet 111 is used for the working medium to flow into the electric pump 100, and the outlet 112 is used for the working medium to flow out of the electric pump 100. When the electric pump 100 is working, the electric pump 100 is connected to an external power supply, and the excitation magnetic field generated by the stator winding 122 is controlled by controlling the current of the stator winding 122. The rotating component 14 rotates around the axis 16 under the action of the excitation magnetic field, so that the working medium entering the inner cavity 13 through the inlet 111 rotates with the rotating component 14, and the working medium will leave the electric pump 100 through the outlet 112 under the action of centrifugal force.

[0033] See also Fig.11As shown, the stator winding 122 includes a stator core 1221, an insulating frame 1222 and a winding 1223, the number of windings 1223 is at least three, the insulating frame 1222 is coated on at least part of the surface of the stator core 1221, and the insulating frame 1222 is used to isolate the winding 1223 and the stator core 1221, so that the winding 1223 and the stator core 1221 are electrically insulated. The insulating frame 1222 and the stator core 1221 can be an integrated structural member. Specifically, as an implementation method, the insulating frame 1222 is formed by injection molding with the stator core 1221 as an insert. Of course, as other implementation methods, the insulating frame 1222 and the stator core 1221 are separately set, and the "separate setting" here means that the insulating frame 1222 and the stator core 1221 are respectively processed into two separate parts and then assembled. The connection is limited or fixed by assembly. In this embodiment, the insulating frame 1222 is formed by injection molding with the stator core 1221 as an insert. It can be understood that the stator core 1221 and the insulating frame 1222 are an integrated structure. The winding 1223 is wound around the insulating frame 1222. As a specific embodiment, the winding 1223 includes nine windings 1223. Of course, as other embodiments, the winding 1223 can also include other numbers of windings 1223, such as three, six, twelve, or other numbers.

[0034] As an implementation, see Figure 2 , Figure 3 , Figures 11 to 13As shown, the electric pump 100 includes a stator assembly 12, the stator assembly 12 includes a stator winding 122 and a stator housing 121, the stator housing 121 is at least formed by insert injection molding with the stator winding 122, and one end of the shaft 16 is fixed to the stator housing 121 by injection molding. Specifically, the stator housing 121 includes a first housing 1211 and a second housing 1212, the first housing 1211 is at least formed by insert injection molding with the stator winding 122, and a first assembly 22 is defined, the first assembly 22 includes a stator winding 122 and a first housing 1211, and the second housing 1212 is at least formed by insert injection molding with the first assembly 22. In this embodiment, the second housing 1212 is formed by insert injection molding with the shaft 16 and the first assembly 22. Specifically, the wall corresponding to the rotor cavity 131 is formed in the second housing 1212. In this way, it is helpful to reduce the risk of leakage of the working medium in the rotor cavity 131 through the joint surface of the first housing 1211 and the second housing 1212. Specifically, the shaft 16 includes a first limiting portion 163, a mounting portion 161 and a second limiting portion 164. The first limiting portion 163 is fixed to the second housing 1212 by injection molding. The rotating assembly 14 is mounted on the mounting portion 161. The second limiting portion 164 is limitedly matched with the pump cover 11. It should be noted that the limiting match here includes interference fit and transition fit. In this way, the stator assembly 12 and the pump cover 11 are equivalent to supporting both ends of the shaft 16 to form a simply supported beam structure, which is beneficial to improving the coaxiality accuracy of the shaft 16 relative to the stator assembly 12. In order to further improve the coaxial accuracy of the shaft 16 and the stator assembly 12, in this embodiment, the second limiting portion 164 is interference fit with the pump cover 11. By interference fit, the pump cover 11 is fixedly connected to the second limiting portion 164, which is beneficial to simplify the structure of the electric pump 100.

[0035] Please refer to Figures 1 to 5 As shown, the electric pump 100 includes a pump cover 11, and the pump cover 11 has an inlet 111 and an outlet 112. The inner cavity 13 includes a rotor cavity 131 and an impeller cavity 132. The wall portion forming the rotor cavity 131 is located in the second housing 1212, and the wall portion forming the impeller cavity 132 is located in the pump cover 11. The pump cover 11 is fixedly connected to the stator assembly 12. Specifically, as an implementation method, the pump cover 11 is fixed to the stator assembly 12 by welding. In this way, it is helpful to reduce the parts of the electric pump 100, thereby laying a certain foundation for the cost reduction of the electric pump 100. As another implementation method, the pump cover 11 is fixedly connected to the stator assembly 12 by a fixing structure. The fixing structure here includes a screw or bolt fixing connection method, or the pump cover 11 and the stator assembly 12 are fixed by a clamping method.

[0036] As an implementation, see Figures 1 to 8As shown, the thrust portion 113 includes a support portion 1131 and a contact portion 1132, the contact portion 1132 is fixedly connected to the support portion 1131, and a thrust surface 1132c is formed on the end surface of the contact portion 1132. Specifically, the contact portion 1132 and the support portion 1131 can be split structural parts. It can be understood that the contact portion 1132 and the support portion 1131 are two separate parts, which are fixed by assembling the parts. The pump cover 11 also includes a pump housing 114. In this embodiment, the support portion 1131 and the pump housing 114 are an integrated structural part, and the part formed by the combination of the support portion 1131 and the pump housing 114 is a first assembly, and the first assembly is fixedly connected to the contact portion 1132. In this way, it is more conducive to the processing and manufacturing of the electric pump 100 and to controlling the cost of the electric pump 100.

[0037] As a specific implementation method, please refer to Figures 1 to 8 As shown, the contact portion 1132 is fixed to the support portion 1131 by injection molding, and the contact portion 1132 includes a fixed portion 1132a and a protruding portion 1132b. The fixed portion 1132a is fixed to the support portion 1131 by injection molding. Specifically, the fixed portion 1132a is embedded in the support portion 1131. It can be understood that at least part of the fixed portion 1132a is wrapped by the support portion 1131. The protruding portion 1132b extends from the support portion 1131 in a direction away from the support portion 1131. It can be understood that the portion not wrapped by the support portion 1131 is the protruding portion 1132b; the thrust surface 1132c is formed on the protruding portion 1132b.

[0038] Please refer to 1 to Figure 8 as well as Figures 11 to 13 As shown, in order to further increase the wear resistance of the thrust surface 1132c, as an implementation method, the material of the thrust portion 113 is a ceramic material, the electric pump 100 includes a pump cover 11, the pump cover 11 includes a support portion 1131, and the thrust portion 113 is fixed to the support portion 1131 by injection molding. Furthermore, the wear resistance of the material of the bearing 1412 is less than the wear resistance of the material of the thrust surface 1132c. For example, the material of the bearing 1412 can be a graphite material, a plastic material, and a powder metallurgy material. In this way, the wear resistance of the material of the bearing 1412 is higher than the wear resistance of the material of the bearing. In this way, during the operation of the electric pump 100, along the axial direction of the electric pump 100, it is beneficial to limit the axial direction of the rotating component 14.

[0039] Please refer to Figures 9 and 10As shown, at present, the electric pump 100' includes a rotor assembly 141' and a thrust portion 113', the rotor assembly 141' includes a bearing 1412' and a rotor 1411', the bearing 1412' is fixedly connected to the rotor 1411', the bearing 1412' and the thrust portion 113' form a thrust structure for limiting the axial movement of the rotor assembly 141', during the operation of the electric pump 100', there is frictional heat generated by the friction between the thrust portion 113' and the bearing 1412', which will cause local high temperature on the end face of the bearing 1412', which may affect and cause deformation of the bearing 1412', and the electric pump 100' is prone to jamming. Therefore, how to reduce the thermal deformation of the bearing 1412' is a technical issue that technical personnel in this field need to consider.

[0040] As an implementation, see Figures 1 to 8 As shown, the electric pump 100 includes a rotating component 14, a thrust portion 113 and a shaft 16. The rotating component 14 includes a bearing 1412 and a rotor 1411. The bearing 1412 is fixedly connected to the rotor 1411. The bearing 1412 has a matching hole 1412a. A portion of the shaft 16 is located in the matching hole 1412a. The portion of the shaft located in the matching hole 1412a is defined as a mounting portion 161. The mounting portion 161 is transmission-matched with the bearing 1412. The electric pump 100 includes a partition 17. The partition 17 includes a partition surface 171. The thrust portion 113 includes a thrust surface 1132c. Along the axial direction of the electric pump 100, the partition 17 and the bearing 1412 are both located on one side of the thrust portion 113. The partition 17 is close to the thrust surface 1132c relative to the bearing 1412. During the operation of the electric pump 100, the partition surface 171 contacts the thrust surface 1132c. The partition 17 separates the bearing 1412 from the thrust portion 113, which is beneficial to reduce the heat generated by the contact and friction between the partition 17 and the thrust portion 113 and the impact on the bearing 1412, which is beneficial to reduce the deformation of the bearing 1412, and further to reduce the jamming of the electric pump 100. It should be noted that the axial direction of the electric pump 100 here and below is the extension direction of the shaft of the electric pump, and the radial direction of the electric pump 100 is the direction perpendicular to the axial direction of the electric pump.

[0041] As an implementation, see Figures 1 to 8 As shown, the partition 17 has a partition hole 172, part of the shaft 16 is located in the partition hole 172, and the wall portion corresponding to the partition hole 172 does not contact the outer wall portion of the shaft 16. In this way, a storage groove is formed between the partition hole 172 and the outer wall portion of the shaft 16. During the operation of the electric pump 100, the friction between the thrust surface 1132c and the partition surface 171 generates wear debris that can enter the storage groove, which is conducive to reducing the wear debris from entering the matching hole, thereby helping to reduce the occurrence of the rotating component 14 getting stuck.

[0042] The spacer and the bearing can be split structural parts. Of course, as another implementation method, please refer to Figures 1 to 8As shown, the partition 17 and the bearing 1412 may also be an integrated structure. Specifically, as an implementation method, the partition 17 and the bearing 1412 are an integrated structural member. Along the axial direction of the electric pump 100, the partition hole 172 extends to the partition surface 171 in a direction away from the partition surface 171, and the partition hole 172 is connected to the matching hole 1412a. In this way, it is helpful to simplify the structure of the electric pump 100 and lay a certain foundation for reducing the cost of the electric pump 100.

[0043] As a specific example, please refer to Figures 1 to 8 As shown, the spacer 17 and the bearing 1412 are defined as a first piece 18, the rotating assembly 14 is at least formed by insert injection molding of the first piece 18, and part of the shaft 16 is located in the first piece 18. In this way, compared with the way of assembling the first piece 18 to form the rotating assembly 18, it is more conducive to the firm fixation of the first piece 18, thereby helping to reduce the noise of the electric pump.

[0044] For further information, please refer to Figures 1 to 3 As shown, as an implementation method, along the radial direction of the electric pump 100, the radial dimension of the partition hole 172 is greater than the radial dimension of the matching hole 1412a, and the portion of the shaft 16 located in the partition hole 172 is defined as the partition section 162, and the radial dimension of the partition section 162 is the same as the radial dimension of the mounting portion 161. In this way, while meeting the structural strength of the shaft 16, it is helpful to reduce the thermal deformation of the bearing 1412.

[0045] Of course, as another implementation, please refer to Figure 1 , Figures 4 to 5 As shown, along the radial direction of the electric pump 100, the radial dimension of the partition hole 172 is equal to the radial dimension of the matching hole 1412a, and the portion of the shaft located in the partition hole 172 is defined as the partition section 162, and the radial dimension of the partition section 162 is smaller than the radial dimension of the mounting portion 161. This arrangement is conducive to facilitating the manufacturing and processing of the matching hole 1412a.

[0046] Please refer to Figures 1 to 8 As shown, in order to make the end surface of the partition 17, that is, the partition surface 171, be evenly worn, the partition surface 171 and the thrust surface 1132c are projected onto a plane parallel to the thrust surface 1132c along the axial direction of the electric pump 100, and the projection of the partition surface 171 is located within the projection of the thrust surface 1132c. In this way, it is beneficial to evenly wear the partition surface 171 of the partition 17, reduce the formation of thin-walled protrusions at the end of the partition 17, and further reduce the formation of large particles of wear debris impurities.

[0047] It should be noted that the above embodiments are only used to illustrate the present application and are not intended to limit the technical solutions described in the present application. Although the present application has been described in detail in this specification with reference to the above embodiments, a person of ordinary skill in the art should understand that a person of ordinary skill in the art can still modify or make equivalent substitutions to the present application, and all technical solutions and improvements thereof that do not depart from the spirit and scope of the present application should be included in the scope of the claims of the present application.

Claims

1. An electric pump (100), Features: The electric pump (100) comprises a rotating assembly (14), a thrust portion (113) and a shaft (16); the rotating assembly (14) comprises a bearing (1412) and a rotor (1411); the bearing (1412) is fixedly connected to the rotor (1411); the bearing (1412) has a matching hole (1412a); a portion of the shaft (16) is located in the matching hole (1412a); the portion of the shaft located in the matching hole (1412a) is defined as a mounting portion (161); the mounting portion (161) is in transmission matching with the bearing (1412). The electric pump (100) comprises a partition (17), the partition (17) comprises a partition surface (171), the thrust portion (113) comprises a thrust surface (1132c), along the axial direction of the electric pump (100), the partition (17) and the bearing (1412) are both located on one side of the thrust portion (113), the partition (17) is close to the thrust surface (1132c) relative to the bearing (1412), and during the operation of the electric pump (100), the partition surface (171) is in contact with the thrust surface (1132c).

2. The electric pump (100) according to claim 1, Features The partition (17) has a partition hole (172), a portion of the shaft (16) is located in the partition hole (172), and the wall portion corresponding to the partition hole (172) does not contact the outer wall portion of the shaft (16).

3. The electric pump (100) according to claim 1, Features The partition (17) has a partition hole (172), and the partition (17) and the bearing (1412) are an integral structural component. Along the axial direction of the electric pump (100), the partition hole (172) extends to the partition surface (171) in a direction away from the partition surface (171), and the partition hole (172) is connected to the matching hole (1412a).

4. The electric pump (100) according to claim 2, Features The partition (17) has a partition hole (172), and the partition (17) and the bearing (1412) are an integral structural component. Along the axial direction of the electric pump (100), the partition hole (172) extends to the partition surface (171) in a direction away from the partition surface (171), and the partition hole (172) is connected to the matching hole (1412a).

5. The electric pump (100) according to claim 3, Features : Along the radial direction of the electric pump (100), the radial dimension of the partition hole (172) is greater than the radial dimension of the matching hole (1412a), and the portion of the shaft located in the partition hole (172) is defined as a partition segment (162), and the radial dimension of the partition segment (162) is the same as the radial dimension of the mounting portion (161).

6. The electric pump (100) according to claim 4, Features : Along the radial direction of the electric pump (100), the radial dimension of the partition hole (172) is greater than the radial dimension of the matching hole (1412a), and the portion of the shaft located in the partition hole (172) is defined as a partition segment (162), and the radial dimension of the partition segment (162) is the same as the radial dimension of the mounting portion (161).

7. The electric pump (100) according to claim 3, Features : Along the radial direction of the electric pump (100), the radial dimension of the partition hole (172) is equal to the radial dimension of the matching hole (1412a), and the portion of the shaft located in the partition hole (172) is defined as the partition segment (162), and the radial dimension of the partition segment (162) is smaller than the radial dimension of the mounting portion (161).

8. The electric pump (100) according to claim 4, Features : Along the radial direction of the electric pump (100), the radial dimension of the partition hole (172) is equal to the radial dimension of the matching hole (1412a), and the portion of the shaft located in the partition hole (172) is defined as the partition segment (162), and the radial dimension of the partition segment (162) is smaller than the radial dimension of the mounting portion (161).

9. The electric pump (100) according to any one of claims 1 to 8, Features : Along the axial direction of the electric pump (100), the partition surface (171) and the thrust surface (1132c) are projected onto a plane parallel to the thrust surface (1132c), and the projection of the partition surface (171) is located within the projection of the thrust surface (1132c).

10. The electric pump (100) according to any one of claims 1 to 8, Features The thrust portion (113) is made of a ceramic material. The electric pump (100) comprises a pump cover (11). The pump cover (11) comprises a support portion (1131). The thrust portion (113) is fixed to the support portion (1131) by injection molding.

11. The electric pump (100) according to claim 9, Features The thrust portion (113) is made of a ceramic material. The electric pump (100) comprises a pump cover (11). The pump cover (11) comprises a support portion (1131). The thrust portion (113) is fixed to the support portion (1131) by injection molding.

12. The electric pump (100) according to any one of claims 3 to 8, Features : The integral part formed by the partition (17) and the bearing (1412) is defined as the first part (18), the rotating component (14) is at least formed by injection molding with the first part (18) as an insert, and part of the shaft (16) is located in the first part (18).

13. The electric pump (100) according to claim 9, Features : The integral part formed by the partition (17) and the bearing (1412) is defined as the first part (18), the rotating component (14) is at least formed by injection molding with the first part (18) as an insert, and part of the shaft (16) is located in the first part (18).

14. The electric pump (100) according to claim 10, Features : The integral part formed by the partition (17) and the bearing (1412) is defined as the first part (18), the rotating component (14) is at least formed by injection molding with the first part (18) as an insert, and part of the shaft (16) is located in the first part (18).

15. The electric pump (100) according to claim 11, Features : The integral part formed by the partition (17) and the bearing (1412) is defined as the first part (18), the rotating component (14) is at least formed by injection molding with the first part (18) as an insert, and part of the shaft (16) is located in the first part (18).

16. The electric pump (100) according to any one of claims 1 to 8, Features The electric pump (100) comprises a pump cover (11), the pump cover (11) comprises a supporting portion (1131), the thrust portion (113) comprises a fixing portion (1132a) and an extending portion (1132b), the fixing portion (1132a) is fixed to the supporting portion (1131) by injection molding, the extending portion (1132b) extends from the supporting portion (1131) in a direction away from the supporting portion (1131), and the thrust surface (1132c) is formed on the extending portion (1132b).

17. The electric pump (100) according to claim 16, Features The electric pump (100) comprises a stator assembly (12), wherein the stator assembly (12) comprises a stator winding (122) and a stator housing (121), wherein the stator housing (121) is formed by at least injection molding with the stator winding (122) as an insert, and the other end of the shaft (16) is fixed to the stator housing (121) by injection molding.

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