CN114183339A

CN114183339A - Electronic oil pump

Info

Publication number: CN114183339A
Application number: CN202010969095.3A
Authority: CN
Inventors: 不公告发明人
Original assignee: Zhejiang Sanhua Automotive Components Co Ltd
Current assignee: Zhejiang Sanhua Automotive Components Co Ltd
Priority date: 2020-09-15
Filing date: 2020-09-15
Publication date: 2022-03-15

Abstract

An electronic oil pump comprises a pump shell, a first rotor assembly, a stator assembly, an electric control plate assembly and a partition, wherein the pump shell can form a pump inner cavity, the pump inner cavity comprises a first cavity, a second cavity and a third cavity, the first rotor assembly is positioned in the first cavity, the stator assembly is arranged in the second cavity, the electric control plate assembly is arranged in the third cavity, the first cavity is communicated with the second cavity, and the second cavity is not communicated with the third cavity; the second cavity is positioned on one side of the main body part of the separator, and the third cavity is positioned on the other side of the main body part of the separator; the electronic oil pump also comprises a first heat-conducting piece, a temperature sensing unit and a second heat-conducting piece, wherein the first heat-conducting piece comprises a first part and a second part, the first part is positioned in the second cavity, and the second part is positioned in the third cavity; the temperature sensing unit and the second heat conducting piece are positioned in the third cavity, the temperature sensing unit is electrically connected with the electric control board assembly, at least part of the second heat conducting piece is positioned between the temperature sensing unit and the second part, and the temperature sensing unit can detect the temperature of the second heat conducting piece; this is advantageous in simplifying the system structure.

Description

Electronic oil pump

Technical Field

The present application relates to the field of vehicles, and more particularly to components of a vehicle lubrication system and/or cooling system.

Background

The electronic oil pump mainly provides a power source for a lubricating system and/or a cooling system of a vehicle; the operating state of the electronic oil pump is related to the temperature of the oil, and in order to detect the temperature of the oil in the electronic oil pump, the system may provide a temperature sensor on an inlet pipe of the electronic oil pump to detect the temperature of the oil, and the temperature sensor is connected to a control unit of the system through a wire harness, which may involve mechanical and electrical connections of the temperature sensor, resulting in a relatively complex system structure.

Disclosure of Invention

An object of the application is to provide an electronic oil pump, be favorable to simplifying system architecture. .

In order to achieve the above purpose, one embodiment of the present application adopts the following technical solutions:

an electronic oil pump comprises a pump shell, a first rotor assembly, a stator assembly and an electric control plate assembly, wherein the pump shell can form a pump inner cavity, the pump inner cavity comprises a first cavity, a second cavity and a third cavity, the first rotor assembly is located in the first cavity, the stator assembly is arranged in the second cavity, the electric control plate assembly is arranged in the third cavity, the first cavity is communicated with the second cavity, and the second cavity is not communicated with the third cavity; the electronic oil pump also comprises a separator, at least part of the separator is arranged between the stator assembly and the electric control plate assembly, the second cavity is positioned on one side of the main body part of the separator, and the third cavity is positioned on the other side of the main body part of the separator; the electronic oil pump further comprises a first heat-conducting member, wherein the first heat-conducting member comprises a first part and a second part, the first part is positioned in the second cavity, and the second part is positioned in the third cavity; the electronic oil pump further comprises a temperature sensing unit and a second heat conducting piece, the temperature sensing unit and the second heat conducting piece are located in the third cavity, the temperature sensing unit is electrically connected with the electric control board assembly, the temperature sensing unit is located on one side of the second portion, at least part of the second heat conducting piece is located between the temperature sensing unit and the second portion, and the temperature sensing unit can detect the temperature of the second heat conducting piece.

Through the mode, the temperature sensing unit is integrated with the electronic oil pump, so that the temperature sensing unit does not need to be separately and electrically connected with an external system, mechanical connection and circuit connection of the system are favorably reduced relatively, and further the system structure is favorably simplified, and the system structure is more compact.

Drawings

FIG. 1 is a schematic cross-sectional view of a first embodiment of an electronic oil pump of the present application;

fig. 2 is a front view schematically showing a partial structure of the electronic oil pump of fig. 1 without the pump cover;

FIG. 3 is a perspective view of the spacer member and the first heat-conducting member of FIG. 1 assembled together;

FIG. 4 is a perspective view of the first member of FIG. 1 or 3;

FIG. 5 is a schematic front view of the spacer member and the first heat-conducting member of FIG. 3 assembled together;

FIG. 6 is a schematic view of a cross-section taken along the line A-A in FIG. 5;

FIG. 7 is a perspective view of the electrical control board assembly of FIG. 1 assembled with a first thermally conductive member;

FIG. 8 is a schematic front view of the assembly of the electronic control board assembly and the first heat conductive member;

FIG. 9 is a schematic cross-sectional view taken along line A-A of FIG. 8;

FIG. 10 is an enlarged view of portion A of FIG. 9;

FIG. 11 is a schematic view of the temperature sensing unit and the second heat conductive member of FIG. 9 or FIG. 10 orthographically projected in a direction parallel to the surface of the second heat conductive member;

FIG. 12 is a schematic cross-sectional view of a second embodiment of an electronic oil pump of the present application;

FIG. 13 is a perspective view of the spacer member and the first heat-conducting member of FIG. 12 assembled together;

fig. 14 is a schematic sectional view showing a third embodiment of the electronic oil pump according to the present application;

FIG. 15 is a schematic perspective view of the spacer member and the first heat-conducting member of FIG. 14 assembled together;

fig. 16 is an enlarged schematic view of a portion a in fig. 15.

Detailed Description

The invention will be further described with reference to the following figures and specific examples:

the electronic oil pump in the following embodiments is mainly capable of providing flowing power for a working medium of a vehicle lubrication system and/or a cooling system, and particularly capable of providing flowing power for a working medium of a lubrication system and/or a cooling system in a vehicle transmission system.

Referring to fig. 1, the electronic oil pump 100 includes a pump housing, a first rotor assembly 2, a stator assembly 4, a second rotor assembly 3, a spacer 5, and an electronic control board assembly 6; the pump housing can form a pump inner cavity, the first rotor assembly 2, the stator assembly 4, the second rotor assembly 3 and the electric control plate assembly 6 are arranged in the pump inner cavity, in the embodiment, the pump inner cavity comprises a first cavity 70, a second cavity 80 and a third cavity 90, the first rotor assembly 2 is arranged in the first cavity 70, the stator assembly 4 and the second rotor assembly 3 are arranged in the second cavity 80, the electric control plate assembly 6 is arranged in the third cavity 90, the first cavity 70 is communicated with the second cavity 80, and the second cavity 80 is not communicated with the third cavity 90; at least part of the separator 5 is arranged between the stator assembly 4 and the electric control plate assembly 6, the second cavity 80 is positioned at one side of the main body part 51 of the separator 5, and the third cavity 90 is positioned at the other side of the main body part 51 of the separator 5; the stator assembly 4 comprises a stator core 41, an insulating frame 42 and a winding 43, wherein the insulating frame 42 at least covers at least part of the surface of the stator core 41, and the winding 43 is wound on the insulating frame 42; when the electronic oil pump 100 works, the electric control board assembly 6 controls the current passing through the winding 43 of the stator assembly 4 to change according to a preset rule, so that the stator assembly 4 is controlled to generate a changing excitation magnetic field, the second rotor assembly 3 rotates under the action of the excitation magnetic field, the second rotor assembly 3 can directly or indirectly drive the first rotor assembly 2 to rotate, and when the first rotor assembly 2 rotates, the volume of a hydraulic cavity between the first rotor assemblies 2 changes, so that a working medium is pressed out to an outflow port to generate flowing power; in this embodiment, at least a portion of the working medium in the first cavity 70 can flow into the second cavity 80, and since the stator assembly 4 is disposed in the second cavity 80, the working medium in the second cavity 80 can cool the stator assembly 4, thereby facilitating heat dissipation of the stator assembly 4.

Referring to fig. 1, in the present embodiment, the pump housing includes a pump cover 1, a first housing 7, and a second housing 8, and the pump cover 1 and the first housing 7, and the first housing 7 and the second housing 8 are relatively fixedly connected; specifically, in this embodiment, the pump cover 1 is connected to the first housing 7 through screws or bolts, so that the electronic oil pump is more convenient to assemble and disassemble, and the maintenance of the first rotor assembly 2 of the electronic oil pump is facilitated, and of course, the pump cover 1 and the first housing 7 may be connected in other manners, such as inserting, clamping, and the like; first casing 7 and second casing 8 fixed connection, specifically, first casing 7 passes through screw or bolted connection with second casing 8, and it is more convenient to set up like this and make the dismouting of electronic oil pump on the one hand, and in this embodiment, because automatically controlled board subassembly 6 sets up in the cavity between first casing 7 and second casing 8, still be favorable to the maintenance of automatically controlled board subassembly in the electronic oil pump like this, and on the other hand can also make the connection of first casing 7 and second casing 8 more reliable, and first casing 7 and second casing 8 can also be through grafting, joint or other connected modes such as.

Referring to fig. 2, the first rotor assembly 2 includes a first rotor 21 and a second rotor 22, the first rotor 21 includes a plurality of internal teeth, the second rotor 22 includes a plurality of external teeth, and a hydraulic pressure chamber 801 is formed between the internal teeth of the first rotor 21 and the external teeth of the second rotor 22, in this embodiment, the hydraulic pressure chamber 801 is also a part of the first chamber 70, and in this embodiment, the first rotor 21 is sleeved on the outer periphery of the second rotor 22. Referring again to fig. 1, the electronic oil pump further includes an inlet 11 through which the working medium can enter the hydraulic chamber 801 and an outlet (not shown) through which the working medium can exit the hydraulic chamber 801; because a certain eccentricity exists between the first rotor 21 and the second rotor 22, when the second rotor 22 rotates, part of external teeth of the second rotor 22 are meshed with part of internal teeth of the first rotor 21, so as to drive the first rotor 21 to rotate, during one rotation of the first rotor 21 and the second rotor 22, the volume in the hydraulic chamber 801 changes, specifically, when the first rotor assembly 2 rotates to a certain angle from the beginning, the volume in the hydraulic chamber 801 gradually increases, so as to form a partial vacuum, the working medium is sucked into the hydraulic chamber 801 from the inlet 11, and when the first rotor 21 and the second rotor 22 continue to rotate, the volume of the hydraulic chamber 801 originally filled with the working medium gradually decreases, the working medium is squeezed, so that the working medium entering the hydraulic chamber 801 is squeezed out to an outlet (not shown), so as to generate flowing power; in this embodiment, the electronic oil pump 100 further includes a pump shaft 15, the pump shaft 15 can drive a part of the first rotor assembly 2 to rotate, specifically, in this embodiment, the pump shaft 15 can drive the second rotor 22 to rotate, in this embodiment, the pump shaft 15 is connected with the second rotor 22, the pump shaft 15 is connected with the second rotor assembly 3, and the second rotor assembly 3 drives the second rotor 22 to rotate through the pump shaft 15, so as to realize the rotation of the first rotor assembly 2.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a first embodiment of an electronic oil pump in the present application; the structure of the first embodiment of the electronic oil pump will be described in detail below.

Referring to fig. 1 to 6, the electronic oil pump 100 further includes a first heat conducting member 9, the first heat conducting member 9 includes a first portion 91, a second portion 92 and a connecting portion 93, the first portion 91 is located on one side of the main body portion 51 of the partition 5, the second portion 92 is located on the other side of the main body portion 51 of the partition 5, the first portion 91 is located in the second cavity 80, the second portion 92 is located in the third cavity 90, the connecting portion 93 is located between the first portion 91 and the second portion 92, the connecting portion 93 connects the first portion 91 and the second portion 92, the connecting portion 93 and the partition 5 are fixedly connected through injection molding, in this embodiment, a connection portion between the connecting portion 93 and the partition 5 is arranged in a sealing manner; specifically, referring to fig. 3, the spacer 5 includes a first protruding portion 52, the first protruding portion 52 protruding from the upper surface of the main body portion 51 of the spacer 5, and the first heat-conducting member 9 passing through the first protruding portion 52; the first protruding portion 52 comprises a groove 521, the groove 521 is recessed from the upper surface of the first protruding portion 52, the groove 521 does not penetrate through the lower surface of the main body 51 of the partition 5, the first heat-conducting member 9 penetrates through the groove 521, and a sealant is filled between the outer periphery of the first heat-conducting member 9 in the groove 521 and the inner wall of the groove 521; this is beneficial to preventing the working medium in the second cavity from leaking to the third cavity through the connection between the connection part 93 and the partition 5, thereby being beneficial to preventing the performance of the electronic control board assembly in the third cavity 90 from being affected.

Referring to fig. 1, the first portion 91 of the first heat conducting member 9 is located in the second cavity 80, such that the first portion 91 can contact with the working medium of the second cavity 80, referring to fig. 1, 7 and 10, the electronic oil pump 100 further includes a temperature sensing unit 13 and a second heat conducting member 16, the temperature sensing unit 13 and the second heat conducting member 16 are located in the third cavity 90, the temperature sensing unit 13 is electrically connected to the electronic control board assembly 6, the temperature sensing unit 13 is located on one side of the second portion 92 of the first heat conducting member 9 along an axial direction perpendicular to the electronic oil pump 100, at least a portion of the second heat conducting member 16 is located between the temperature sensing unit 13 and the second portion 92, and the temperature sensing unit 13 can detect the temperature of the second heat conducting member 16; through the above manner, on one hand, because the first portion 91 of the first heat conducting member 9 is located in the second chamber 80, the heat of the working medium in the second chamber 80 can be transferred to the first heat conducting member 9, and because at least a part of the second heat conducting member 16 is located between the temperature sensing unit 13 and the second portion 92, the heat of the second portion 92 of the first heat conducting member 9 can be transferred to the second heat conducting member 16, and the temperature sensing unit 13 can indirectly know the temperature of the working medium in the second chamber 80 or know the parameter related to the temperature of the working medium in the second chamber 80 by detecting the temperature of the second heat conducting member 16; on the other hand, through the mode, the temperature sensing unit 13 is integrated with the electronic oil pump, so that the temperature sensing unit 13 does not need to be separately and electrically connected with an external system, mechanical connection and line connection of the system are favorably reduced relatively, the system structure is favorably simplified, and the system structure is more compact.

Referring to fig. 7 to 11, in the present embodiment, the temperature sensing unit 13 is connected to the electric control board assembly 6, the electric control board assembly 6 includes a substrate 61, the substrate 61 includes a first surface 615 and a second surface 616, the first surface 615 is closer to the main body 51 of the spacer 5 than the second surface 616, specifically, the temperature sensing unit 13 and the temperature sensing unit 13 are disposed closer to the first surface 615 than the second surface 616, specifically, referring to fig. 11, the temperature sensing unit 13 includes a detecting portion 131 and an electrically connecting portion 132, one end of the electrically connecting portion 132 is electrically connected to the detecting portion 131, the other end of the electrically connecting portion 132 is electrically connected to the circuit of the electric control board assembly 6, in the present embodiment, the detecting portion 131 directly contacts the second heat conducting member 16, the second portion 92 of the first heat conducting member 9 directly contacts the second heat conducting member 16, of course, the second portion 92 of the first heat conducting member 9 may indirectly contact the second heat conducting member 16 through an adapter, the detection part 131 may be in indirect contact with the second heat conduction member 16 through an adapter; in this way, since the second portion 92 of the first heat-conducting member 9 is in contact with the second heat-conducting member 16 and the detecting portion 131 is in contact with the second heat-conducting member 16, the contact between the two members is beneficial to reducing the temperature loss and further beneficial to improving the detection accuracy of the temperature sensing unit 13 relative to the heat transfer of air; of course, for the case where the requirement for the accuracy of temperature detection is not high, a preset distance may be set between the second portion 92 of the first heat-conducting member 9 and the second heat-conducting member 16 along the direction perpendicular to the axial direction of the electronic oil pump, and similarly, a preset distance may be set between the detecting portion 131 and the second heat-conducting member 16; in the present embodiment, the temperature sensing unit 13 may be a thermistor, a temperature sensor, or another temperature detection element.

Referring to fig. 7 to 11, in the present embodiment, the second heat conducting member 16 is connected to the substrate 61, and along the direction parallel to the axial direction of the electronic oil pump, a part of the second heat conducting member 16 is located between the substrate 61 and the detecting portion 131 of the temperature sensing unit 13, and the second heat conducting member 16 located between the substrate 61 and the detecting portion 131 of the temperature sensing unit 13 can support the temperature sensing unit 13; specifically, in the present embodiment, the second heat conducting element 16 is connected to the first surface 615 of the substrate 61, but of course, the second heat conducting element 16 may also be connected to the second surface 616 of the substrate 61, and in this case, the temperature sensing unit 13 is disposed closer to the second surface 616 than the first surface 615; in addition, in this embodiment, the material of the second heat conducting member 16 may be a metal body, a metal coating, a heat conducting silica gel, a heat conducting silicone grease, or other materials with good heat conducting performance.

Referring to fig. 11, in the present embodiment, the temperature sensing unit 13 and the second heat conducting member 16 are orthographically projected in a direction parallel to the upper surface of the second heat conducting member 16, and a part of the projection of the detecting portion 131 is located in the projection of the second heat conducting member 16, that is, the area where the second heat conducting member 16 is located covers a part of the area where the detecting portion 131 is located, which is beneficial to relatively increasing the temperature sensing area of the detecting portion 131, and is further beneficial to increasing the sensitivity of the temperature sensing unit 13 for detecting the temperature; of course, all the projections of the detecting portion 131 may be located within the projection of the second heat conducting member 16, that is, the located region of the second heat conducting member 16 completely covers the located region of the detecting portion 131, and the electrical connection portions 132 may be disposed at both ends of the detecting portion 131.

Referring to fig. 9, the electronic control board assembly 6 further includes a heating electronic component 62, the heating electronic component 62 is fixedly connected to the substrate 61, and a connection surface of the heating electronic component 62 on the substrate 61 and a connection surface of the temperature sensing unit 13 on the substrate 61 are opposite surfaces, specifically, in this embodiment, the heating electronic component 62 is fixedly connected to the second surface 616 of the substrate 61, and when the temperature sensing unit 13 is connected to the second surface 616 of the substrate 61, the heating electronic component 62 should be fixedly connected to the first surface 615 of the substrate 61, which is favorable for reducing the influence of heat generated by the heating electronic component 62 on the temperature sensing unit 13, and thus is favorable for reducing the interference on the temperature sensing unit; the "heating electronic component 62" mainly includes common electronic components that are easy to heat, such as a diode, a MOS transistor, an inductor, a resistor, and a capacitor.

Referring to fig. 1, in the present embodiment, one end of the first portion 91 of the first heat conducting member 9 is connected to the insulating frame 42 of the stator assembly 4, and the first portion 91 of the first heat conducting member 9 is not electrically connected to the winding 43 of the stator assembly 4, in the present embodiment, the material of the first heat conducting member 9 is an electrically conductive metal material, and one end of the second portion 92 of the first heat conducting member 9 is electrically connected to the electronic control board assembly 6, specifically, in the present embodiment, one end of the second portion 92 of the first heat conducting member 9 is electrically connected to the reference ground layer of the electronic control board assembly 6; referring to fig. 1, the electronic oil pump 100 further includes a conductive member 10, the conductive member 10 is located in the second cavity 80, the conductive member 10 is fixedly connected to the second portion 92 of the first heat-conducting member 9, and of course, the conductive member 10 and the first heat-conducting member 9 may also be an integrated structure; referring to fig. 1, at least a portion of the conductive member 10 is located in the inner cavity of the first housing 7, the material of the first housing 7 is a metal material, the stator assembly 4 is located in the inner cavity of the first housing 7, a portion of the conductive member 10 is in contact with the first heat conducting member 9, and another portion of the conductive member 10 is in contact with the first housing 7; the first shell 7 is indirectly electrically connected with the reference stratum of the electric control board assembly 6 in the above manner, so that on one hand, the first shell 7 can radiate the electromagnetic waves absorbed by itself to the reference stratum of the electric control board assembly 6, and when the reference stratum of the electric control board assembly 6 is grounded with the outside, the electromagnetic waves absorbed by the reference stratum of the electric control board assembly 6 are radiated to the outside grounded part, which is favorable for reducing the amount of the electromagnetic waves absorbed and accumulated by the first shell 7 itself, and is favorable for reducing the influence of the electromagnetic waves absorbed and accumulated by the first shell 7 itself on the performance of an external system or an electronic oil pump; on the other hand, when the surface of the first housing 7 has static electricity, the static electricity on the surface of the first housing 7 can be conducted to the reference ground layer of the electronic control board assembly 6, and when the reference ground layer of the electronic control board assembly 6 is grounded with the outside, the static electricity on the reference ground layer of the electronic control board assembly 6 is conducted to the grounded place of the outside, which is beneficial to reducing the static electricity accumulated on the surface of the first housing 7, and further beneficial to reducing the influence of the static electricity accumulated on the surface of the first housing 7 on the external system and/or the performance of the electronic control board assembly 6; in addition, in this embodiment, the stator core 41 is in contact with the first housing 7, the second housing 8 is in contact with the first housing 7, and the pump cover 1 is in contact with the first housing 7, so that both the stator core 41 and the second housing 8 are electrically connected to the reference ground of the electronic control board assembly, and thus, static electricity on the surfaces of the stator core 41, the second housing 8, and the pump cover 1 or electromagnetic waves absorbed by the static electricity or the electromagnetic waves can be conducted to the reference ground of the electronic control board assembly 6, and static electricity on the reference ground or electromagnetic waves conducted to the electronic control board assembly 6 is conducted to an external ground. Referring to fig. 1, in the present embodiment, one end of the conductive member 10 is in contact with the first housing 7, but in this case, one end of the conductive member 10 may also be in contact with the stator core 41 or the second housing 8.

Referring to fig. 1, in the present embodiment, the first heat conducting member 9 is not electrically connected to the winding 43 of the stator assembly 4, so that the current passing through the winding does not pass through the first heat conducting member 9, which is beneficial to reducing the heat generation of the first heat conducting member 9 itself, and since the first heat conducting member 9 needs to transfer the heat to the second heat conducting member 16, which is beneficial to preventing the heat generation of the first heat conducting member 9 itself from being transferred to the second heat conducting member 16, which is beneficial to reducing the interference to the temperature sensing unit; of course, the first portion 91 of the first heat conducting member 9 may also be electrically connected to the winding, and at this time, the first heat conducting member 9 can be used as an energization pin end of the winding, that is, at this time, the first heat conducting member 9 may pass through the current passing through the winding, because the first portion 91 of the first heat conducting member 9 is located in the second cavity 80, the working medium in the second cavity 80 may play a certain role in cooling the first heat conducting member, and thus, when the current passing through the winding passes through the first heat conducting member 9, the detection result of the temperature sensing unit may not cause a large deviation. Therefore, in the above manner, in the embodiment, the first heat conducting member 9 can be used for heat conduction on one hand, and can be used for ground connection on the other hand, so that the structure is simple, the number of parts is reduced, and the cost is saved.

Referring to fig. 12, the structure of the second embodiment of the electronic oil pump is schematically shown; a second embodiment of the electronic oil pump of the present application will be described in detail below.

Referring to fig. 12 and 13, in the present embodiment, one end of the first portion 91 of the first heat-conducting member 9 is a free end, one end of the first portion 91 is not in contact with the stator assembly 4, and one end of the second portion 92 is not electrically connected with the electronic control board assembly 6; in this embodiment, the electronic oil pump 100 further includes four connection terminals penetrating the upper and lower surfaces of the main body portion 51 of the separator 5 and fixedly connected to the main body portion 51 of the separator 5, specifically, four connection terminals are defined as a first connection terminal 141, a second connection terminal 142, a third connection terminal 143, and a fourth connection terminal 144, wherein the first connection terminal 141, the second connection terminal 142 and the third connection terminal 143 are used as the power-on pin ends of the winding 43, specifically, one end of the first connection terminal 141, the second connection terminal 142 and the third connection terminal 143 is electrically connected to the winding 43 of the stator assembly 4, the other end of the first connection terminal 141, the second connection terminal 142 and the third connection terminal 143 is electrically connected to the electric control board assembly 6, and the fourth connection terminal 144 is electrically connected to the reference ground layer of the electric control board assembly 6 and the first housing 7; in addition, in this embodiment, the material of the second heat conducting member 16 may be a metal body, a metal coating, a heat conducting silica gel, a heat conducting silicone grease, or other materials with good heat conducting performance.

Compared with the first embodiment of the electronic oil pump, in this embodiment, the electronic oil pump 100a further includes a connection terminal, one end of the first portion 91 of the first heat conducting member 9 is a free end, one end of the first portion 91 is not in contact with the stator assembly 4, and one end of the second portion 92 is not electrically connected with the electronic control board assembly 6; thus, the first heat conducting member has the function of only conducting heat, and does not have the function of electric connection; other features of the present embodiment can refer to the first embodiment of the electronic oil pump, which is not described herein; in addition, in this embodiment, the temperature sensing unit 13 is disposed closer to the first surface than the second surface of the substrate, and the specific structure may refer to the temperature sensing unit in the first embodiment of the electronic oil pump, and of course, the temperature sensing unit 13 may also be disposed closer to the lower surface of the substrate, which is not repeated herein.

Referring to fig. 14, fig. 14 is a schematic structural view of a third embodiment of the electronic oil pump of the present application; a third embodiment of the electronic oil pump of the present application will be described in detail below.

Referring to fig. 14 to 16, in the present embodiment, the temperature sensing unit 13 is fixedly connected to the main body 51 of the spacer 5, the second heat conducting member 16 is fixedly connected to the main body 51 of the spacer 5, and the temperature sensing unit 13 and the second heat conducting member 16 are located between the main body 51 of the spacer 5 and the substrate 61 of the electronic control board assembly 6; along the axial direction perpendicular to the electronic oil pump, the temperature sensing unit 13 is positioned at one side of the second part 92 of the first heat conducting member 9, and at least part of the second heat conducting member 16 is positioned between the temperature sensing unit 13 and the second part 92; referring to fig. 14, along a direction parallel to the axial direction of the electronic oil pump, a portion of the second heat conducting member 16 is located between the main body portion 51 of the spacer 5 and the detecting portion 131 of the temperature sensing unit 13, the second heat conducting member 16 located between the main body portion 51 of the spacer 5 and the detecting portion 131 of the temperature sensing unit 13 can support the detecting portion 131 of the temperature sensing unit 13 and is disposed in contact with the detecting portion 131 of the temperature sensing unit 13, the second portion 92 of the first heat conducting member 9 is disposed in contact with the second heat conducting member 16, and the detecting portion 132 of the temperature sensing unit 13 is electrically connected to the electronic control board assembly 6; in this way, since the second portion 92 of the first heat conducting member 9 contacts the second heat conducting member 16 and the detecting portion 131 of the temperature sensing unit 13 contacts the second heat conducting member 16, the contact between the two members is beneficial to reducing the temperature loss and improving the detection accuracy of the temperature sensing unit 13 relative to the air heat transfer. In addition, in this embodiment, the material of the second heat conducting member 16 may be a metal body, a metal layer, heat conducting silica gel, heat conducting silicone grease, or other materials with good heat conducting performance.

Compared with the first embodiment of the electronic oil pump, in the present embodiment, the temperature sensing unit 13 and the second heat conductor 16 are fixedly connected to the main body portion 51 of the spacer 5; other features of the present embodiment can refer to the first embodiment of the electronic oil pump, which is not described herein; of course, the structure of the first heat conducting member in the second embodiment of the electronic oil pump may also be referred to as the first heat conducting member in this embodiment, which is not repeated herein.

It should be noted that: although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can make modifications and substitutions on the present application, and all technical solutions and modifications thereof without departing from the spirit and scope of the present application should be covered by the claims of the present application.

Claims

1. An electronic oil pump comprises a pump shell, a first rotor assembly, a stator assembly and an electric control plate assembly, wherein the pump shell can form a pump inner cavity, the pump inner cavity comprises a first cavity, a second cavity and a third cavity, the first rotor assembly is located in the first cavity, the stator assembly is arranged in the second cavity, the electric control plate assembly is arranged in the third cavity, the first cavity is communicated with the second cavity, and the second cavity is not communicated with the third cavity; the electronic oil pump also comprises a separator, at least part of the separator is arranged between the stator assembly and the electric control plate assembly, the second cavity is positioned on one side of the main body part of the separator, and the third cavity is positioned on the other side of the main body part of the separator; the electronic oil pump further comprises a first heat-conducting member, wherein the first heat-conducting member comprises a first part and a second part, the first part is positioned in the second cavity, and the second part is positioned in the third cavity; the electronic oil pump further comprises a temperature sensing unit and a second heat conducting piece, the temperature sensing unit and the second heat conducting piece are located in the third cavity, the temperature sensing unit is electrically connected with the electronic control board assembly, the temperature sensing unit is located on one side of the second portion along the axial direction perpendicular to the electronic oil pump, at least part of the second heat conducting piece is located between the temperature sensing unit and the second portion, and the temperature sensing unit can detect the temperature of the second heat conducting piece.

2. The electronic oil pump of claim 1, wherein: the temperature sensing unit comprises a detection part and an electric connection part, one end of the electric connection part is electrically connected with the detection part, and the other end of the electric connection part is electrically connected with the electric control board assembly; orthographically projecting the temperature sensing unit and the second heat conducting member in a direction parallel to the lower end face of the main body part of the spacer, wherein at least part of the projection of the detection part is overlapped with the projection of the second heat conducting member.

3. The electronic oil pump according to claim 1 or 2, characterized in that: the electric control board assembly comprises a base plate, and the second heat-conducting piece is connected with the base plate; along the axial direction parallel to the electronic oil pump, a part of the second heat conducting piece is positioned between the substrate and the detection part of the temperature sensing unit, and the second heat conducting piece positioned between the substrate and the detection part of the temperature sensing unit can support a part of the temperature sensing unit.

4. The electronic oil pump of claim 3, wherein: the second heat conducting piece is contacted with the second part, and the detection part of the temperature sensing unit is contacted with the second heat conducting piece; the electric control board assembly further comprises a heating electronic component, the heating electronic component is connected with the substrate, and the connecting surface of the heating electronic component, which corresponds to the substrate, is opposite to the connecting surface of the second heat-conducting piece, which corresponds to the substrate.

5. The electronic oil pump according to claim 1 or 2, characterized in that: the temperature sensing unit is connected with the main body part of the isolating piece, the second heat conducting piece is connected with the main body part of the isolating piece, and the temperature sensing unit and the second heat conducting piece are located between the main body part of the isolating piece and the substrate of the electric control board assembly.

6. The electronic oil pump of claim 5, wherein: the first heat-conducting member is in contact with the second heat-conducting member; along the axial direction parallel to the electronic oil pump, part of the second heat conducting piece is positioned between the main body part of the isolating piece and the detection part of the temperature sensing unit, and the second heat conducting piece positioned between the main body part of the isolating piece and the detection part of the temperature sensing unit can support the temperature sensing unit and is in contact with the detection part of the temperature sensing unit.

7. The electronic oil pump according to any one of claims 1 to 6, characterized in that: one end of the first portion is a free end, one end of the first portion is not in contact with the stator assembly, and one end of the second portion is not electrically connected with the electric control board assembly.

8. The electronic oil pump according to any one of claims 1 to 6, characterized in that: one end of the first portion is connected with the stator assembly, and one end of the second portion is electrically connected with the electric control board assembly.

9. The electronic oil pump of claim 8, wherein: the stator assembly comprises a stator core, a winding and an insulating frame, at least part of the insulating frame is coated on the surface of the stator core, the winding is wound on the insulating frame, one end of the first portion is connected with the insulating frame, the first portion is electrically connected with the winding, and the first heat conducting piece can serve as an electrifying pin end of the winding.

10. The electronic oil pump of claim 9, wherein: the first heat conducting member is electrically connected with the reference ground layer of the electric control board assembly; the stator assembly comprises a stator core, a winding and an insulating frame, at least part of the insulating frame is coated on the surface of the stator core, the winding is wound on the insulating frame, one end of the first part is connected with the insulating frame, and the first part is not electrically connected with the winding.

11. The electronic oil pump of claim 10, wherein: the first heat conducting piece is made of an electrically conductive metal material; the electronic oil pump also comprises a conductive piece, the conductive piece is positioned in the second cavity, and the conductive piece is contacted with the second part; the pump housing comprises a first housing, at least part of the conductive piece is positioned in an inner cavity of the first housing, the first housing is made of a metal material, and the conductive piece is arranged in contact with the first housing or the stator core.

12. The electronic oil pump according to any one of claims 1 to 11, characterized in that: the material of the second heat conducting piece comprises metal, heat conducting silica gel or heat conducting silicone grease; along the axial direction of the electronic oil pump, the first heat conducting piece penetrates through the main body part of the isolating piece, the first heat conducting piece comprises a connecting part, the connecting part is located between the first part and the second part, the connecting part is fixedly connected with the isolating piece, and the connecting part and the isolating piece are in sealed arrangement.