Electronic oil pump

Abstract

The electronic oil pump comprises a motor rotor assembly, a detection unit and a partition part, the motor rotor assembly comprises a motor rotor and a shaft, the shaft and the motor rotor are fixedly connected or connected in a limiting mode, the electronic oil pump is provided with an inner hole, a working medium can circulate in the inner hole, at least part of the partition part is located on one side of the inner hole, and the partition part blocks the inner hole. The wall part corresponding to the inner hole comprises a shaft and a part of separation part, the detection unit comprises a detection piece, at least part of the detection piece is located on the other side of the separation part in the axial direction of the shaft, the detection piece is fixed to the shaft through the separation part or the detection piece is fixed to the shaft in a bonded mode, and in this way, impurities entering the inner hole are reduced while the detection piece is fixed.

Description

[Technical field]

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

[0002] The electronic oil pump includes a motor rotor assembly, which includes a shaft and a motor rotor. The shaft is fixedly connected to the motor rotor, and the shaft has an inner hole through which a working medium can flow. The electronic oil pump also includes a detection component, which is used to correspond to a sensor and detect the phase of the motor rotor. The inner hole has two openings, one of which is located at the end of the shaft, which is close to the sensor. The detection component is fixed to the end of the shaft by an adhesive. Before the adhesive solidifies, excess adhesive can easily enter the inner hole to form impurities. How to fix the detection component and reduce the entry of the above-mentioned impurities into the inner hole is a technical issue that technicians in this field need to consider. [Summary of the invention]

[0003] The object of the present invention is to provide an electronic oil pump which can fix a detection component and reduce the amount of impurities entering the inner hole.

[0004] To achieve the above-mentioned purpose, an embodiment provided in the present application adopts the following technical scheme: an electronic oil pump, the electronic oil pump includes a motor rotor assembly, a detection unit and a partition, the motor rotor assembly includes a motor rotor and a shaft, the shaft is fixedly connected or limit-connected to the motor rotor, the electronic oil pump has an inner hole, the inner hole can flow working medium, the partition is located on one side of the inner hole, the partition blocks the inner hole, the wall corresponding to the inner hole includes the shaft and part of the partition, the detection unit includes a detection piece, along the axial direction of the shaft, at least part of the detection piece is located on the other side of the partition, the detection piece is fixed to the shaft through the partition or the detection piece is bonded and fixed to the shaft.

[0005] In one embodiment of the present application, the electronic oil pump includes a partition, which is located on one side of the inner hole. The partition blocks the inner hole. The wall corresponding to the inner hole includes an axis and a portion of the partition. The partition separates the inner hole and the detection part. In this way, when the detection part is fixed to the shaft, impurities entering the inner hole can be reduced.

Brief Description of the Drawings

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

[0007] Figure 2 yes Figure 1 A schematic diagram of the exploded structure of the electronic oil pump;

[0008] Figure 3 yes Figure 1 A schematic diagram of the structure of the first embodiment of the electronic oil pump along the XX section;

[0009] Figure 4 yes Figure 3 A three-dimensional structural schematic diagram of a first embodiment of a fixing method of a motor rotor assembly and a detection member in an electronic oil pump;

[0010] Figure 5 yes Figure 4 Schematic diagram of the electronic oil pump structure along the YY section;

[0011] Figure 6 yes Figure 5 The enlarged structural diagram at position I in the middle;

[0012] Figure 7 yes Figure 1 A schematic diagram of the structure of the second embodiment of the electronic oil pump along the XX section;

[0013] Figure 8 yes Figure 7 A three-dimensional structural schematic diagram of a first embodiment of a fixing method of a motor rotor assembly and a detection member in an electronic oil pump;

[0014] Fig. 9 yes Figure 8 Schematic diagram of the electronic oil pump structure along the ZZ section;

[0015] Fig.10 yes Figure 8 The enlarged structural diagram at middle II;

[0016] Fig.11 yes Figure 1 A schematic diagram of the structure of the third embodiment of the electronic oil pump along the XX section;

[0017] Fig.12 yes Fig.11 A three-dimensional structural schematic diagram of a first embodiment of a fixing method of a motor rotor assembly and a detection component in an electronic oil pump;

[0018] Fig.13 yes Fig.12 Schematic diagram of the structure of the electronic oil pump along the WW section;

[0019] Fig.14 yes Fig.13 The enlarged structural diagram at position Ⅲ in the middle;

[0020] Fig.15 yes Figure 3 , Figure 7 , Fig.11 A schematic diagram of a three-dimensional structure in one direction of a first implementation method of connecting a control panel assembly of an electronic oil pump with a Hall sensor;

[0021] Fig.16 yes Figure 3 , Figure 7 , Fig.11 A schematic diagram of a three-dimensional structure in another direction of the first embodiment of the connection between the control panel assembly of the electronic oil pump and the Hall sensor;

[0022] In the accompanying drawings: 100, electronic oil pump;

[0023] 11. housing; 111. pump cover; 1111. oil inlet; 1112. oil outlet; 112. motor housing; 113. bottom cover;

[0024] 12. stator assembly; 121. stator core; 122. insulation part; 123. winding;

[0025] 13. Motor rotor assembly; 131. Motor rotor; 132. Shaft; 1321. First end; 1321a. Opening; 1322. Second end; 1323. Mounting portion; 1323a. Bottom; 1323b. Side; 1324. Inner hole;

[0026] 14. Detection unit; 141. Detection member; 1411. End surface; 1412. Side surface; 142. Hall sensor; 143. Partition; 1431. Main body; 1431a. First support portion; 1431b. Second support portion; 1431c. Plate portion; 1431d. Groove portion; 1432. Fixing portion; 144. Adhesive portion;

[0027] 15. control board assembly; 151. substrate; 1511. front side; 1512. back side;

[0028] 16. Pump rotor. [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 electronic oil pump can be applied to the automobile lubrication system and / or cooling system, and can provide flow circulation power for the working medium in the automobile lubrication system and / or cooling system. The automobile lubrication system and / or cooling system can provide lubricating oil and / or cooling oil for the transmission system.

[0032] Please refer to Figures 1 to 3As shown, the electronic oil pump 100 includes a housing 11, a motor rotor assembly 13, a stator assembly 12, a pump rotor 16, a control board assembly 15 and a detection unit 14; specifically, the housing 11 includes a pump cover 111, a motor housing 112 and a bottom cover 113, the pump cover 111 has an oil inlet 1111 and an oil outlet 1112, the oil inlet 1111 is used for the inflow of the working medium, and the oil outlet 1112 is used for the outflow of the working medium; one end of the pump cover 111 is fixedly connected to one end of the motor housing 112, specifically, as an implementation method, one end of the pump cover 111 is fixedly connected to one end of the motor housing 112 by screws. A first inner cavity 17 is formed between the pump cover 111 and the motor housing 112, and the pump rotor 16 is accommodated in the first inner cavity 17. The bottom cover 113 is fixedly connected to the other end of the motor housing 112, specifically, as an implementation method, the bottom cover 113 is fixedly connected to the other end of the motor housing 112 by screws. A second inner cavity 18 is formed between the motor housing 112 and the bottom cover 113, and a part of the motor rotor assembly 13, the stator assembly 12, the control board assembly 15, and the detection unit 14 are accommodated in the second inner cavity 18. The stator assembly 12 includes a stator core 121, an insulating portion 122, and a winding 123. The insulating portion 122 is coated on at least the surface of the stator core 121, and the winding 123 is wound around the insulating portion 122. The motor rotor assembly 13 includes a motor rotor 131 and a shaft 132. The motor rotor 131 is fixedly connected or limitedly connected to the shaft 132. The motor rotor assembly 13 is transmission-connected to the pump rotor 16. As an implementation method, a part of the shaft 132 is fixed to the pump rotor 16. Specifically, the pump rotor 16 and a part of the shaft 132 are interference-fitted.

[0033] The detection unit 14 includes a detection member 141 and a phase sensor, and the detection member 141 includes a detection magnet. When the electronic oil pump 100 is working, the control board assembly 15 controls the current passing through the stator assembly 12 to change according to a certain rule, thereby controlling the stator assembly 12 to generate a changing excitation magnetic field, and the motor rotor assembly 13 rotates under the action of the excitation magnetic field. The motor rotor assembly 13 drives the pump rotor 16 to rotate through the shaft 132. When the pump rotor 16 rotates, the working medium is pressed out of the oil outlet 1112 to generate flow power. The first inner cavity 17 and the second inner cavity 18 are connected. When the electronic oil pump 100 is working, the working medium enters the first inner cavity 17 through the oil inlet 1111, and the working medium leaves the first inner cavity 17 through the oil outlet 1112. Since the first inner cavity 17 and the second inner cavity 18 are connected, the working medium in the first inner cavity 17 can enter the second inner cavity 18. In this way, the working medium located in the second inner cavity 18 can contact the stator assembly 12 and / or the control board assembly 15, which is beneficial to heat dissipation of the stator assembly 12 and / or the control board assembly 15.

[0034] As Figures 1 to 16As shown, the shaft 132 includes a first end 1321 and a second end 1322, the first end 1321 is close to the motor rotor 131, the second end 1322 is close to the pump rotor 16, the first end 1321 is located in the second inner cavity 18, the second end 1322 is located in the first inner cavity 17, along the direction of the shaft 132 of the electronic oil pump 100, the inner hole 1324 extends from the second end 1322 to the first end 1321, to facilitate the processing of the inner hole 1324, along the direction of the shaft 132 of the electronic oil pump 100, one end of the inner hole 1324 is connected to the first inner cavity 17, and the other end of the inner hole 1324 is connected to the second inner cavity 18. The inner hole 1324 can flow the working medium, it can be understood that the working medium can enter the second inner cavity 18 through the inner hole 1324; or, it can be understood that the working medium of the second inner cavity 18 can leave the second inner cavity 18 through the inner hole 1324. Along the direction of the shaft 132 of the electronic oil pump 100, at least part of the motor rotor assembly 13 is on one side of the detection unit 14, and at least part of the control board assembly 15 is located on the other side of the detection unit 14. Specifically, the detection unit 14 includes a detection member 141 and a phase sensor, the detection member 141 is fixed to part of the shaft 132, and the phase sensor is fixed to the control board assembly 15. In this way, it is beneficial to control the axial clearance between the detection member 141 and the phase sensor, and then it is beneficial to improve the phase detection accuracy of the motor rotor assembly 13. It should be noted that the axial direction of the electronic oil pump 100 here and below is the direction in which the center line of the shaft 132 extends.

[0035] Please refer to Figures 1 to 16 As shown, the shaft 132 extends from the first end 1321 to the second end 1322 in the length direction. The shaft 132 is a long axis. Along the axial direction of the electronic oil pump 100, the inner hole 1324 extends from the second end 1322 to the first end 1321. To facilitate the processing of the inner hole 1324, as an implementation method, the inner hole 1324 penetrates the shaft 132 along the length direction of the shaft 132. The inner hole 1324 includes an opening 1321a, and the opening 1321a is located at the first end 1321. To reduce the distance between the detection element 141 and the phase sensor in the direction of the shaft 132, the detection element 141 is arranged close to the first end 1321. The inner hole 1324 usually includes two openings 1321a, one opening 1321a is located at the first end 1321, and the other opening can be located at the second end 1322. Of course, as other implementations, the opening can also be located at the peripheral side wall of the shaft 132. In this embodiment, the other opening is located at the second end 1322.

[0036] As in the background art, the end of the detection member is fixed to the shaft by adhesive, which is in liquid or jelly form before solidification. When the detection member is fixed to the shaft, it is easy to enter the inner hole through the opening, forming impurities. Since the detection member is fixed at the first end, the inner hole originally opened at both ends becomes a blind hole. For deep and long holes, the impurities formed are not easy to clean.

[0037] As an implementation, see Figures 1 to 16 As shown, the electronic oil pump 100 includes a motor rotor assembly 13, a detection unit 14 and a partition 143. The motor rotor assembly 13 includes a motor rotor 131 and a shaft 132. The shaft 132 is fixedly connected or limit-connected to the motor rotor 131. The electronic oil pump 100 has an inner hole 1324, and the inner hole 1324 can flow a working medium. The partition 143 is located on one side of the inner hole 1324. The partition 143 blocks the inner hole 1324. The wall corresponding to the inner hole 1324 includes the shaft 132 and part of the partition 143. The detection unit 14 includes a detection piece 141. Along the axial direction of the shaft 132, at least part of the detection piece 141 is located on the other side of the partition 143. The detection piece 141 is fixed to the shaft 132 through the partition 143 or the detection piece 141 is bonded and fixed to the shaft 132. In this way, the electronic oil pump 100 includes a partition 143, which is located on one side of the inner hole 1324. The partition 143 blocks the inner hole 1324. The wall corresponding to the inner hole 1324 includes the shaft 132 and a part of the partition 143. The partition 143 separates the inner hole 1324 and the detection part 141. In this way, when the detection part 141 is fixed to the shaft 132, impurities entering the inner hole 1324 can be reduced.

[0038] As a specific implementation method, please refer to Figures 1 to 6 , Figures 11 to 14 As shown, the partition 143 includes a main body 1431 and a fixing part 1432, the shaft 132 includes a first end 1321, and the inner hole 1324 includes an opening 1321a, the opening 1321a is located at the first end 1321, along the axial direction of the electronic oil pump 100, at least part of the detection member 141 is located on one side of the partition 143, and part of the shaft 132 is located on the other side of the partition 143, the fixing part 1432 blocks the opening 1321a, and the detection member 141 is fixed to the main body 1431. In this way, the partition 143 is arranged in the axial direction of the electronic oil pump 100, which is conducive to reducing the size of the shaft 132 in the axial direction, so that it is conducive to the mechanical processing of the long shaft 132; at the same time, the size of the shaft 132 in the axial direction is reduced, which is conducive to the mechanical processing of the inner hole 1324 and reduces the difficulty of processing the inner hole 1324.

[0039] Further, as an implementation method, please refer to Figures 3 to 6As shown, the main body 1431 includes a first support portion 1431a and a second support portion 1431b. Along the axial line direction of the shaft 132, the first support portion 1431a is close to the shaft 132 relative to the second support portion 1431b, and the fixing portion 1432 protrudes from the first support portion 1431a in a direction away from the first support portion 1431a. The fixing portion 1432 is fixed with the inner hole 1324 by interference fit. Of course, it can also be fixed by welding, for example, the first support portion 1431a is fixed by welding to the first end portion 1321. Or, as an implementation method, the fixing portion 1432 is limitedly matched with the inner hole 1324, and the first support portion 1431a is fixed by welding to the first end portion 1321. It should be noted that the limited fit here includes a transition fit or a clearance fit. The fixing method of the partition 143 and the shaft 132 adopts a fixing method other than an adhesive to reduce the source of impurities, thereby reducing the impurities from entering the inner hole 1324.

[0040] Further, as an implementation method, please refer to Figures 3 to 6 As shown, the second support portion 1431b includes a plate portion 1431c and a groove portion 1431d, and the groove portion 1431d is concave from the plane where the plate portion 1431c is located toward the direction close to the first support portion 1431a. Part of the detection member 141 is located in the groove portion 1431d, and the detection member 141 is bonded and fixed to the wall portion corresponding to the groove portion 1431d. In this way, it is helpful to strengthen the contact area between the detection member 141 and the groove portion 1431d, and to strengthen the strength of the fixation of the detection member 141 and the partition portion 143. Specifically, a bonding portion 144 is provided between the end face 1411 and / or the side face of the detection member 141 and the wall portion corresponding to the groove portion 1431d, which is beneficial to the fixation of the detection member 141 and the partition portion 143. Figure 5 FIG. 1 only shows an embodiment of filling the bonding portion 144 between the side surface of the detection member 141 and the side wall corresponding to the groove portion 1431 d .

[0041] As another implementation, see Figures 11 to 14As shown, the partition 143 includes a main body 1431 and a fixing part 1432, the main body 1431 includes a first supporting part 1431a and a second supporting part 1431b, along the axial direction of the shaft 132, the first supporting part 1431a is close to the shaft 132 relative to the second supporting part 1431b, the fixing part 1432 is concave from the first supporting part 1431a to the direction of the second supporting part 1431b, the fixing part 1432 is fixedly connected to the outer side wall of the shaft 132, and the detection member 141 is fixed to the main body 1431. In this way, it is beneficial to increase the fixing strength of the partition 143 and the shaft 132. Specifically, the side wall of the fixing part 1432 is fixedly connected to the outer side wall of the shaft 132. As an implementation method, the side part 1323b of the fixing part 1432 is interference fit with the outer side wall of the shaft 132. In this way, it is beneficial to increase the radial dimension of the partition 143, and then it is beneficial to improve the structural strength of the partition 143. It should be noted that the above-mentioned “radial direction” refers to a direction perpendicular to the “axial direction”.

[0042] Of course, the fixing portion 1432 and the shaft 132 may also be fixed in other ways, for example, the fixing portion 1432 and the shaft 132 are fixed in an injection molding manner. Fig.11 and Fig.14 As shown, the partition 143 is an injection molded part, and the partition 143 is formed by at least using the detection member 141 as an insert, and at least part of the detection member 141 is located in the main body 1431. In this way, while the partition 143 and the shaft 132 are fixed, the partition 143 is an injection molded part, and the injection molded part has a non-magnetic property, which is beneficial to improve the magnetic properties of the detection member 141, and further to improve the detection accuracy of the detection unit 14.

[0043] The partition 143 and the shaft 132 can be set separately. It should be noted that the "separate setting" here means that the partition 143 and the shaft 132 are processed into two separate parts respectively, and then assembled and fixedly connected by assembly. Specifically, as an implementation method, the partition 143 is an injection molded part, and the partition 143 is formed by injection molding with at least the detection part 141 as an insert, at least part of the detection part 141 is located in the main body 1431, and the partition 143 is fixedly connected to the shaft 132. Of course, the partition 143 and the shaft 132 can also be an integrated structural part. As an implementation method, the partition 143 is formed by injection molding with the detection part 141 and the shaft 132 as inserts.

[0044] As an implementation, see Figures 7 to 10As shown, the shaft 132 includes a mounting portion 1323, the shaft 132 includes a first end 1321 and a second end 1322, the first end 1321 is close to the detection member 141 relative to the second end 1322, the mounting portion 1323 is concave from the first end 1321 to the second end 1322, the mounting portion 1323 is connected to the inner hole 1324, the wall portion corresponding to the mounting portion 1323 includes a bottom 1323a and a side portion 1323b, the partition portion 143 abuts against the bottom 1323a, the detection member 141 is located in the mounting portion 1323, and the detection member 141 is bonded and fixed to the peripheral side wall portion corresponding to the mounting portion 1323. In this way, the detection member 141 and the shaft 132 are directly fixed through the bonding portion 144, which is conducive to simplifying the fixing method of the detection member 141 and the shaft 132 while reducing the entry of impurities into the inner hole 1324. In this embodiment, the partition 143 is a plate-like structure, the partition 143 abuts against the bottom 1323a, and the material of the partition 143 is a non-magnetic material. In this way, while improving the magnetic properties of the detection member 141, it is helpful to reduce the entry of impurities into the inner hole 1324.

[0045] Please refer to Figures 1 to 16 As shown, the detection unit 14 includes a phase sensor, which includes but is not limited to a Hall sensor 142. The electronic oil pump 100 includes a control board assembly 15, which includes a substrate 151, and the Hall sensor 142 is fixed to the substrate 151. Specifically, the substrate 151 includes a front surface 1511 and a back surface 1512. Along the axial direction of the electronic oil pump 100, the front surface 1511 is closer to the motor rotor assembly 13 relative to the back surface 1512, and the Hall sensor 142 is fixed to the front surface 1511. In order to improve the detection accuracy of the detection unit 14 on the motor rotor assembly 13, the Hall sensor 142 is arranged close to the central axis of the shaft 132.

[0046] 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 electronic oil pump (100), characterized in that: The electronic oil pump (100) comprises a motor rotor assembly (13), a detection unit (14) and a partition (143); the motor rotor assembly (13) comprises a motor rotor (131) and a shaft (132); the shaft (132) is fixedly connected or positionally connected to the motor rotor (131); the electronic oil pump (100) has an inner hole (1324); the inner hole (1324) is capable of flowing a working medium; along the axial direction of the shaft (132), at least part of the partition (143) is located on one side of the inner hole (1324). On the other side, the partition (143) blocks the inner hole (1324); the wall portion corresponding to the inner hole (1324) includes the shaft (132) and part of the partition (143); the detection unit (14) includes a detection member (141); along the axial direction of the shaft (132), at least part of the detection member (141) is located on the other side of the partition (143); the detection member (141) is fixed to the shaft (132) through the partition (143) or the detection member (141) is fixed to the shaft (132) by bonding.

2. The electronic oil pump (100) according to claim 1, characterized in that: The partition (143) comprises a main body (1431) and a fixing part (1432); the shaft (132) comprises a first end (1321); the inner hole (1324) comprises an opening (1321a); ​​the opening (1321a) is located at the first end (1321); the fixing part (1432) blocks the opening (1321a); ​​the fixing part (1432) is fixedly connected to the shaft (132); and the detection member (141) is fixedly connected to the main body (1431).

3. The electronic oil pump (100) according to claim 2, characterized in that: The main body (1431) includes a first supporting portion (1431a) and a second supporting portion (1431b). Along the axial direction of the shaft (132), the first supporting portion (1431a) is closer to the shaft (132) relative to the second supporting portion (1431b), and the fixing portion (1432) protrudes from the first supporting portion (1431a) in a direction away from the first supporting portion (1431a). The fixing portion (1432) is fixed to the inner hole (1324) by interference fit, and the detection member (141) is fixedly connected to the second supporting portion (1431b).

4. The electronic oil pump (100) according to claim 3, characterized in that: The second supporting portion (1431b) includes a plate portion (1431c) and a groove portion (1431d), wherein the groove portion (1431d) is concave from the plane where the plate portion (1431c) is located toward the direction close to the first supporting portion (1431a), and at least part of the detecting member (141) is located in the groove portion (1431d), and the detecting member (141) is bonded and fixed to the wall portion corresponding to the groove portion (1431d).

5. The electronic oil pump according to claim 2, characterized in that: The main body (1431) includes a first supporting portion (1431a) and a second supporting portion (1431b). Along the axial direction of the shaft (132), the first supporting portion (1431a) is closer to the shaft (132) relative to the second supporting portion (1431b), and the fixing portion (1432) is concave from the first supporting portion (1431a) to the second supporting portion (1431b). The fixing portion (1432) is fixedly connected to the outer wall of the shaft (132), and the detection member (141) is fixed to the main body (1431).

6. The electronic oil pump (100) according to claim 5, characterized in that: The partition (143) is an injection molded part, the partition (143) is formed by at least using the detection part (141) as an insert, at least a portion of the detection part (141) is located in the main body (1431), and the fixing part (1432) is fixed to the shaft (132) by interference fit.

7. The electronic oil pump (100) according to claim 1, characterized in that: The shaft (132) comprises a mounting portion (1323), the shaft (132) comprises a first end portion (1321) and a second end portion (1322), the first end portion (1321) is closer to the detection member (141) relative to the second end portion (1322), the mounting portion (1323) is concave from the first end portion (1321) to the second end portion (1322), the mounting portion (1323) is communicated with the inner hole (1324), the wall portion corresponding to the mounting portion (1323) comprises a bottom portion (1323a) and a side portion (1323b), a portion of the partition (143) is in contact with the bottom portion (1323a), the detection member (141) is located in the mounting portion (1323), and the detection member (141) is bonded and fixed to the peripheral side wall portion corresponding to the mounting portion (1323).

8. The electronic oil pump (100) according to any one of claims 1 to 7, characterized in that: The detection unit (14) comprises a Hall sensor (142), the electronic oil pump (100) comprises a control board assembly (15), the control board assembly (15) comprises a substrate (151), and the Hall sensor (142) is fixed to the substrate (151).

9. The electronic oil pump (100) according to claim 8, characterized in that: The substrate (151) comprises a front side (1511) and a back side (1512); the front side (1511) is closer to the motor rotor assembly (13) than the back side (1512); and the Hall sensor (142) is fixed to the front side (1511).

10. The electronic oil pump (100) according to claim 8 or 9, characterized in that: The Hall sensor (142) is disposed close to the central axis of the shaft (132).

Images