Electronic oil pump

Abstract

An electronic oil pump includes a first rotor assembly, a second rotor assembly, and a stator assembly, wherein the second rotor assembly is drively connected to the first rotor assembly; the electronic oil pump has a first chamber and a second chamber, wherein the first rotor assembly is located in the first chamber and the stator assembly is located in the second chamber, the first chamber is capable of allowing working medium to flow through, the first chamber and the second chamber are in communication, and at least a portion of the working medium in the first chamber can flow into the second chamber and contact the stator assembly; the electronic oil pump also includes a temperature detection unit, which is limited to the stator assembly, and the temperature detection unit is capable of detecting the temperature of the working medium located in the second chamber; this simplifies the system structure and makes the system structure more compact.

Description

Technical Field

[0001] This application relates to the field of vehicles, and more particularly to components of vehicle lubrication and / or cooling systems. Background Technology

[0002] The electronic oil pump mainly provides a power source for the vehicle's lubrication and / or cooling systems. The operating status of the electronic oil pump is related to the oil temperature. In order to detect the oil temperature in the electronic oil pump, a sensor is installed on the inlet pipe of the electronic oil pump to detect the oil temperature. This involves the mechanical connection between the temperature detection unit and the external system, resulting in a relatively complex system structure. Summary of the Invention

[0003] The purpose of this application is to provide an electronic oil pump that simplifies the system structure and makes the system structure more compact.

[0004] To achieve the above objectives, one embodiment of this application adopts the following technical solution:

[0005] An electronic oil pump includes a first rotor assembly, a second rotor assembly, and a stator assembly, wherein the second rotor assembly is drively connected to the first rotor assembly; the electronic oil pump has a first chamber and a second chamber, wherein the first rotor assembly is located in the first chamber, and the stator assembly is located in the second chamber; the first chamber is capable of having a working medium flowing through it, and the first chamber is in communication with the second chamber; at least a portion of the working medium in the first chamber can flow into the second chamber and contact the stator assembly; the electronic oil pump further includes a temperature detection unit, which is positioned relative to the stator assembly, and the temperature detection unit is capable of detecting the temperature of the working medium located in the second chamber.

[0006] In the technical solution of this application, at least a portion of the working medium in the first cavity can flow into the second cavity and contact the stator assembly; the electronic oil pump also includes a temperature detection unit, which is limited to the stator assembly, and the temperature detection unit can detect the temperature of the working medium in the second cavity; by directly integrating the temperature detection unit with the electronic oil pump in the above manner, the temperature detection unit does not need to be mechanically connected to an external system separately, which helps to reduce the mechanical connections of the system, thereby simplifying the system structure and making the system structure more compact. Attached Figure Description

[0007] Figure 1 This is a cross-sectional structural schematic diagram of the electronic oil pump in this application;

[0008] Figure 2 yes Figure 1 A front view schematic diagram of a portion of the structure of an electronic oil pump without the pump cover installed;

[0009] Figure 3 yes Figure 1 A three-dimensional structural schematic diagram of a first embodiment in which the middle stator assembly and temperature detection unit are assembled together;

[0010] Figure 4 yes Figure 3 An enlarged structural diagram of section A in the middle;

[0011] Figure 5 yes Figure 3 A three-dimensional structural diagram of the middle stator assembly;

[0012] Figure 6 yes Figure 5 A magnified structural diagram of section B in the middle;

[0013] Figure 7 yes Figure 3 A three-dimensional structural diagram of the medium temperature detection unit;

[0014] Figure 8 yes Figure 1 A three-dimensional structural schematic diagram of a second embodiment in which the middle stator assembly and the temperature detection unit are assembled together;

[0015] Figure 9 yes Figure 8 A magnified structural diagram of section C in the middle;

[0016] Figure 10 yes Figure 8 A three-dimensional structural diagram of the middle stator assembly;

[0017] Figure 11 yes Figure 10 A magnified structural diagram of section D in the middle;

[0018] Figure 12 yes Figure 1 A three-dimensional structural schematic diagram of a third embodiment in which the middle stator assembly and the temperature detection unit are assembled together;

[0019] Figure 13 yes Figure 12 A magnified structural diagram of section E in the middle;

[0020] Figure 14 yes Figure 12 A three-dimensional structural diagram of the middle stator assembly;

[0021] Figure 15 yes Figure 14 A magnified structural diagram of section F in the middle. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0023] The specific embodiments of this application will be described in detail below with reference to the accompanying drawings. First, it should be noted that the directional terms such as up, down, left, right, front, back, inner, outer, top, and bottom mentioned or possibly used in this specification are defined relative to the structures shown in the corresponding drawings. They are relative concepts and may therefore vary depending on their location and usage. Therefore, these or other directional terms should not be interpreted as restrictive terms.

[0024] The electronic oil pump in the following embodiments is mainly capable of providing the flow power for the working medium of the vehicle's lubrication system and / or cooling system, specifically providing the flow power for the working medium of the lubrication system and / or cooling system in the vehicle's transmission system.

[0025] See Figure 1 and Figure 2 The electronic oil pump 100 includes a first rotor assembly 1, a stator assembly 2, a second rotor assembly 3, and a circuit board assembly 4. The circuit board assembly 4 can provide power to the coils in the first rotor assembly 2, and can also control the operation of the first rotor assembly 1 in real time according to the operating environment. The electronic oil pump 100 includes a first chamber 80 and a second chamber 90. The first rotor assembly 1 is disposed in the first chamber 80, and the stator assembly 2, the second rotor assembly 3, and the circuit board assembly 4 are disposed in the second chamber 90. The stator assembly 2 includes a stator core 21, an insulating frame 22, and windings 23. The insulating frame 22 has at least... At least a portion of the surface of the stator core 21 is covered by the winding 23, which is wound around the insulating frame 22. When the electronic oil pump 100 is working, the circuit board assembly 4 controls the change of current in the winding 23, thereby controlling the stator assembly 2 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 1 to rotate. When the first rotor assembly 1 rotates, the volume of the hydraulic cavity 800 between the first rotor assemblies 1 changes, causing the working medium to be forced out to the outflow channel, thereby generating the flow power. In this embodiment, the working medium is cooling oil.

[0026] Specifically, see Figures 1 to 2 The first rotor assembly 1 includes a first rotor 11 and a second rotor 12. The first rotor 11 includes a plurality of internal teeth, and the second rotor 12 includes a plurality of external teeth. A hydraulic cavity 800 is formed between the internal teeth of the first rotor 11 and the external teeth of the second rotor 12. In this embodiment, the hydraulic cavity 800 is also part of the first cavity 80. In this embodiment, the first rotor 11 is sleeved on the outer periphery of the second rotor 12. See also Figure 1The electronic oil pump 100 also includes an inlet channel 13 and an outlet channel (not shown). The working medium can enter the hydraulic chamber 800 through the inlet channel 13 and leave the hydraulic chamber 800 through the outlet channel (not shown). Due to the certain eccentricity between the first rotor 11 and the second rotor 12, when the second rotor 12 rotates, some of the external teeth of the second rotor 12 mesh with some of the internal teeth of the first rotor 11, thereby driving the first rotor 11 to rotate. During the rotation of the first rotor 11 and the second rotor 12, the volume of the hydraulic chamber 800 changes. Specifically, when the first rotor 11 assembly 1 rotates from the starting point to a certain angle, the volume of the hydraulic chamber 800 gradually increases, thereby forming a partial vacuum, and the working medium flows from the inlet channel. The working medium is drawn into the hydraulic chamber 800 through channel 13. As the first rotor 11 and the second rotor 12 continue to rotate, the volume of the hydraulic chamber 800, which was originally filled with working medium, gradually decreases. The working medium is squeezed, thereby causing the working medium that entered the hydraulic chamber 800 to be forced out to the outflow channel (not shown), thus generating the power of flow. In this embodiment, the electronic oil pump 100 also includes a pump shaft 5. The pump shaft 5 can drive part of the first rotor assembly 1 to rotate. Specifically, in this embodiment, the pump shaft 5 can drive the first rotor 11 to rotate. In this embodiment, one side of the pump shaft 5 is connected to the first rotor 11, and the other side of the pump shaft 5 is connected to the second rotor assembly 3. The second rotor assembly 3 drives the second rotor 12 to rotate through the pump shaft 5, thereby realizing the rotation of the first rotor assembly 1.

[0027] See Figure 1 In this embodiment, the first cavity 80 and the second cavity 90 are connected; specifically, see [link to documentation]. Figure 1 The wall surface corresponding to the first cavity 80 includes a bottom wall 801, which supports the first rotor assembly 1. The electronic oil pump 100 also includes a first channel 10, which penetrates the upper and lower surfaces of the bottom wall 801 and connects the first cavity 80 and the second cavity 90. In this embodiment, the inlet of the first channel 10 is located on the upper surface of the bottom wall 801, and the outlet of the first channel 10 is located on the lower surface of the bottom wall 801. At least a portion of the working medium in the first cavity 80 can flow into the second cavity 90 through the first channel 10 and contact the stator assembly 2 located in the second cavity 90. This allows the heat generated by the stator assembly 2 to exchange heat with the working medium in the second cavity 90, thereby improving the heat dissipation of the stator assembly 2 and thus increasing the service life of the electronic oil pump 100. See also Figure 1In this embodiment, the working medium in the second cavity 90 is also in contact with the circuit board assembly 4, so that the working medium in the second cavity 90 can also exchange heat with the heat generated by the circuit board assembly 4, which is beneficial to the heat dissipation of the circuit board assembly 4, and further beneficial to improving the service life of the electronic oil pump 100; of course, as another embodiment, the circuit board assembly 4 may not be in contact with the working medium in the second cavity 90.

[0028] See Figure 1 In this embodiment, the electronic oil pump 100 further includes a second channel 20, which penetrates the pump shaft 5 and has orifices on the upper and lower end faces of the pump shaft 5, respectively. In this embodiment, the outlet of the second channel 10 is located on the upper end face of the pump shaft 5, and the inlet of the second channel 10 is located on the lower end face of the pump shaft 5. The working medium in the second cavity 90 can leave the second cavity 90 through the second channel 20. The outlet of the second channel 20 is closer to the inlet channel 13 than the inlet of the first channel 10. Therefore, when the electronic oil pump is working, the pressure at the outlet of the second channel 20 is less than the pressure of the working medium at the inlet of the first channel 10. This creates a pressure difference between the working medium at the inlet of the first channel 10 and the outlet of the second channel 20, allowing the working medium in the second cavity 90 to flow out through the second channel 20. Since the stator assembly 2 and the circuit board assembly 4 are disposed in the second cavity 90, the flowing working medium can carry away at least part of the heat from the stator assembly 2 and the circuit board assembly 4, thereby further improving the heat dissipation efficiency of the stator assembly 2 and the circuit board assembly 4. See also Figure 1 In this embodiment, the second channel 20 is connected to the outlet channel of the electronic oil pump 100.

[0029] See Figure 1 , Figure 1 The flow direction of the working medium is shown. Specifically, when the electronic oil pump is working, the working medium has two flow directions. To better illustrate the flow direction of the working medium, Figure 1 The thick dashed line represents the first flow direction, and the thick solid line represents the second flow direction. In the first flow direction, the working medium flows into the hydraulic cavity between the first rotor assemblies 1 from the inlet channel 13, and then flows out of the volumetric cavity from the outlet channel. In the second flow direction, a portion of the working medium entering the volumetric cavity between the first rotor assemblies 1 flows into the second cavity 90 from the first channel 10, and then the working medium in the second cavity 90 flows out to the outlet channel from the second channel 20. In this embodiment, the inlet direction of the working medium is vertical, and the outlet direction of the working medium is horizontal. Here, "vertical direction" and "horizontal direction" refer to the direction in which the electronic oil pump 100... Figure 1 The orientation of the working medium when it is placed is, of course, as another implementation method, the inflow direction and the outflow direction of the working medium can also be set in parallel.

[0030] See Figure 3 The electronic oil pump 100 also includes a temperature detection unit 6, which is limited to the stator assembly 2. The temperature detection unit 6 can detect the temperature of the working medium located in the second chamber 90. This allows the temperature detection unit 6 to be directly integrated with the electronic oil pump, so that the temperature detection unit 6 does not need to be mechanically connected to an external system separately. This helps to reduce the mechanical connections of the system, thereby simplifying the system structure and making the system structure more compact.

[0031] See Figure 1 In this embodiment, along the height direction of the electronic oil pump 100, the stator core 21 is located between the first rotor assembly 1 and the circuit board assembly 4, with the stator core 21 being closer to the first rotor assembly 1 than the circuit board assembly 4. Of course, as in other embodiments, along the height direction of the electronic oil pump 100, at least a portion of the circuit board assembly 4 may be located between the first rotor assembly 1 and the stator core 21, with the circuit board assembly 4 being closer to the first rotor assembly 1 than the stator core 21. The following method of limiting the temperature detection unit 6 with the stator assembly is also applicable to electronic oil pumps where at least a portion of the circuit board assembly 4 is located between the first rotor assembly 1 and the stator core 21.

[0032] The following section will provide a detailed description of the specific structure of the temperature detection unit 6 and the stator assembly limit setting.

[0033] See Figure 3 , Figure 3 A schematic diagram of the first embodiment of the stator assembly and temperature detection unit 6 limiting setting; the first embodiment of the stator assembly and temperature detection unit 6 limiting setting will be described in detail below.

[0034] See Figures 3 to 7 In this embodiment, the temperature detection unit 6 is positioned relative to the insulating frame 22. This helps prevent the temperature detection unit 6 from conducting electricity with the stator core 21. Specifically, the insulating frame 22 includes a first body portion 221 and a limiting portion 222. Along the height direction of the insulating frame 22, the limiting portion 222 protrudes from the first body portion 221. The limiting portion 222 has a second body portion 2221 and a receiving portion 2222. Along the height direction of the limiting portion 222, the receiving portion 2222 extends from the end face 2221a of the second body portion 2221. The receiving portion 2222 has a first opening 2223, which is formed on the end face 2221a of the second body portion 2221. Part of the temperature detection unit 6 is located in the cavity corresponding to the receiving portion 2222. Of course, in other embodiments, all of the temperature detection units 6 can be located in the cavity corresponding to the receiving portion 2222.

[0035] See Figures 3 to 7The temperature detection unit 6 is limited by the limiting part 222. In this embodiment, the temperature detection unit 6 includes a pin part 61 and a temperature probe part 62, which are electrically connected to the pin part 61. The temperature probe part 62 is located in the cavity corresponding to the receiving part 2222. Along the height direction of the receiving part 2222, the pin part 61 extends out of the cavity corresponding to the receiving part 2222. The temperature probe part 62 and the receiving part 2222 are tightly fitted, thereby limiting the temperature detection unit 6 and the limiting part 222, and thus limiting the temperature detection unit 6 along the height direction of the receiving part 2222. The stator assembly 2 will not detach from the stator assembly 2 in either the radial or axial direction. Specifically, in this embodiment, the first side 621 of the temperature probe 62 contacts the first side 2224 corresponding to the receiving part 2222, the second side 622 of the temperature probe 62 contacts the second side 2225 corresponding to the receiving part 2222, the first side 621 and the second side 622 of the temperature probe 62 are arranged opposite to each other, and the upper end surface of the temperature probe 62 abuts against the bottom surface 2226 corresponding to the receiving part 2222.

[0036] See Figure 8 , Figure 8 A schematic diagram of the second embodiment of the stator assembly and temperature detection unit 6 limiting setting; the second embodiment of the stator assembly and temperature detection unit limiting setting will be described in detail below.

[0037] See Figures 8 to 11 In this embodiment, the temperature detection unit 6 is positioned relative to the insulating frame 22. Specifically, the insulating frame 22 includes a first body portion 221 and a limiting portion 222. Along the height direction of the insulating frame 22, the limiting portion 222 protrudes from the first body portion 221. The limiting portion 222 has a second body portion 2221 and a receiving portion 2222. Along the height direction of the limiting portion 222, the receiving portion 2222 extends from the end face of the second body portion 2221. The receiving portion 2222 has a first opening 2223, which is formed on the end face of the second body portion 2221. The temperature detection unit 6 is partially located in the cavity corresponding to the receiving portion 2222. Of course, in other embodiments, the temperature detection unit 6 may also be entirely located in the cavity corresponding to the receiving portion 2222.

[0038] See Figures 8 to 11The temperature detection unit 6 is limited by the limiting part 222. In this embodiment, the temperature detection unit 6 includes a pin part 61 and a temperature probe part 62, which is electrically connected to the pin part 61. The temperature probe part 62 is located in the cavity corresponding to the receiving part 2222. Along the height direction of the receiving part 2222, the pin part 61 extends out of the cavity corresponding to the receiving part 2222. The temperature probe part 62 abuts against the bottom surface 2226 corresponding to the receiving part 2222. In this embodiment, the side surface corresponding to the temperature probe part 62 and the receiving part 2222 can be referenced from the first... In this embodiment, the temperature sensing unit 62 and the corresponding side of the receiving part 2222 are tightly fitted. Of course, in other embodiments, the side of the temperature sensing unit 62 and the receiving part 2222 can also be loosely fitted. In this embodiment, the pin part 61 of the temperature sensing unit 6 is electrically connected and mechanically connected to the circuit board assembly. In this way, when the temperature sensing unit 62 and the corresponding side of the receiving part 2222 are loosely fitted, the mechanical connection between the pin part 61 of the temperature sensing unit 6 and the circuit board assembly can prevent the temperature sensing unit 6 from disengaging from the cavity corresponding to the receiving part 2222 through the first opening 2223.

[0039] See Figures 8 to 11 The receiving portion 222 has a second opening 2227, which is formed on the outer side of the second body portion 2221; the limiting portion 222 also includes at least one stop portion 223, which abuts against the temperature detection unit 6 or has a gap between the stop portion 223 and the temperature detection unit 6, and the stop portion 223 can prevent the temperature detection unit 6 from disengaging from the limiting portion 222 through the second opening 2227.

[0040] Specifically, see Figures 8 to 11 In this embodiment, at least a portion of the root of the baffle 223 is connected to the side corresponding to the receiving portion 2222, and the back surface 2231 of the baffle 223 abuts against the temperature sensing portion 62 of the temperature detection unit 6 or there is a gap between the back surface 2231 of the baffle 223 and the temperature sensing portion 62 of the temperature detection unit 6. In this way, by setting the baffle 223, the temperature detection unit 6 can be prevented from disengaging from the limiting portion 222 through the second opening 2227.

[0041] See Figures 8 to 11In this embodiment, the limiting part 222 includes two stops 223, one of which is defined as the first stop 2231 and the other as the second stop 2232. At least a portion of the root of the first stop 2231 is connected to the first side surface 2224 corresponding to the receiving part 2222, and at least a portion of the root of the second stop 2232 is connected to the second side surface 2225 corresponding to the receiving part 2222. The first side surface 2224 and the second side surface 2225 corresponding to the receiving part 2222 are disposed opposite to each other. The bottom surface 2226 corresponding to the receiving part 2222 connects the first side surface 2224 and the bottom surface 2225 corresponding to the receiving part 2222. The second side 2225, the first stop 2231 and the second stop 2232 are arranged opposite to each other, and there is a preset distance between the first stop 2231 and the second stop 2232. The first stop 2231 abuts against the temperature detection part 62 of the temperature detection unit 6 or there is a gap between the first stop 2231 and the temperature detection unit 6. The second stop 2232 abuts against the temperature detection unit 6 or there is a gap between the second stop 2232 and the temperature detection unit 6. In this embodiment, the limiting part 222 includes two stops 223. Of course, as another embodiment, the limiting part 222 may also include only one stop 223. In this case, the area of ​​the stop 223 covering the temperature detection unit 6 can be adaptively designed.

[0042] In addition, in this embodiment, at least a portion of the root of the stop 223 is connected to the side corresponding to the receiving portion 2222. Of course, in other embodiments, the root of the stop 223 may also be at least partially connected to the bottom surface 2226 corresponding to the receiving portion 2222.

[0043] Compared with the first embodiment of limiting the stator assembly and the temperature detection unit, in this embodiment, the limiting part 222 further includes at least one stop 223, the stop 223 abuts against the temperature detection unit 6 or there is a gap between the stop 223 and the temperature detection unit 6, and the stop 223 can prevent the temperature detection unit 6 from disengaging from the limiting part 222 through the second opening 2227.

[0044] See Figure 12 , Figure 12 A schematic diagram of a third embodiment of the stator assembly and temperature detection unit limiting setting; the third embodiment of the stator assembly and temperature detection unit limiting setting will be described in detail below.

[0045] See Figures 12 to 15In this embodiment, the temperature detection unit 6 is positioned relative to the insulating frame 22. Specifically, the insulating frame 22 includes a first body portion 221 and a limiting portion 222. Along the height direction of the insulating frame 22, the limiting portion 222 protrudes from the first body portion 221. The limiting portion 222 has a second body portion 2221 and a receiving portion 2222. Along the height direction of the limiting portion 222, the receiving portion 2222 extends from the end face of the second body portion 2221. The receiving portion 2222 has a first opening 2223, which is formed on the end face of the second body portion 2221. The temperature detection unit 6 is partially located in the cavity corresponding to the receiving portion 2222. Of course, in other embodiments, the temperature detection unit 6 may also be entirely located in the cavity corresponding to the receiving portion 2222.

[0046] See Figures 12 to 15 The temperature detection unit 6 is limited by the limiting part 222; specifically, in this embodiment, the temperature detection unit 6 includes a pin part 61 and a temperature sensing part 62, and the temperature sensing part 62 is electrically connected to the pin part 61; see also Figures 12 to 15 The temperature sensing part 62 is located in the cavity corresponding to the receiving part 2222. Along the height direction of the receiving part 2222, the pin part 61 extends out of the cavity corresponding to the receiving part 2222. The temperature sensing part 62 abuts against the bottom surface 2226 corresponding to the receiving part 2222. In this embodiment, the side of the temperature sensing part 62 and the side of the receiving part 2222 can be tightly fitted with reference to the first embodiment. Of course, as another embodiment, the side of the temperature sensing part 62 and the side of the receiving part 2222 can also be gap-fitted. In this embodiment, the pin part 61 of the temperature detection unit 6 is electrically connected and mechanically connected to the circuit board assembly. In this way, when the temperature sensing part 62 and the side of the receiving part 2222 are gap-fitted, the mechanical connection between the pin part 61 of the temperature detection unit 6 and the circuit board assembly can prevent the temperature detection unit 6 from detaching from the cavity corresponding to the receiving part 2222 through the first opening 2223.

[0047] See Figures 12 to 15 The receiving portion 2222 has a second opening 2227, which is formed on the outer side of the second body portion 2221; the limiting portion 222 also includes at least one stop portion 223, which abuts against the temperature detection unit 6 or has a gap between the stop portion 223 and the temperature detection unit 6, and the stop portion 223 can prevent the temperature detection unit 6 from disengaging from the limiting portion 222 through the second opening 2227.

[0048] See Figures 12 to 15In this embodiment, at least a portion of the root of the stop 223 is connected to the bottom surface 2226 corresponding to the receiving portion 2222. Along the protrusion direction of the limiting portion 222, the stop 223 is protruding relative to the bottom surface 2226 corresponding to the receiving portion 2222. There is a preset distance between the first side surface of the stop 223 and the first side surface 2224 corresponding to the receiving portion 2222, and there is a preset distance between the second side surface of the stop 223 and the second side surface 2225 corresponding to the receiving portion 2222. The first side surface and the second side surface of the stop 223 are relatively... The baffle 223 is configured such that at least a portion of it is located on one side of the temperature detection unit 6. The baffle 223 is disposed opposite to the back surface 2228 corresponding to the receiving portion 2222. The back surface 2228, the first side surface 2224, and the second side surface 2225 corresponding to the receiving portion 2222 all extend along the height direction of the receiving portion 2222. The back surface of the receiving portion 2222 connects the first side surface 2224 and the second side surface 2225 corresponding to the receiving portion 2222. See also... Figures 12 to 15 In this embodiment, the height of the baffle 223 is higher than the temperature sensing part 62 of the temperature detection unit 6, and the baffle 223 abuts against the temperature sensing part 62 of the temperature detection unit 6 or there is a gap between the baffle 223 and the temperature sensing part 62 of the temperature detection unit 6; by setting the baffle 223, the temperature detection unit 6 can be prevented from disengaging from the limiting part 222 through the second opening 2227.

[0049] See Figures 12 to 15 The baffle 223 includes a first part 2233 and a second part 2234. At least a portion of the root of the first part 2233 is connected to the bottom surface 2226 corresponding to the receiving part 2222. The second part 2234 protrudes from the inner side of the first part 2233. The bottom surface of the second part 2234 abuts against the temperature sensing part 62 of the temperature detection unit 6 or there is a gap between the bottom surface of the second part 2234 and the temperature sensing part 62 of the temperature detection unit 6. This can prevent the temperature detection unit 6 from detaching from the cavity corresponding to the receiving part 2222.

[0050] See Figures 12 to 15The second part 2234 has an inclined surface 224, which is connected to the upper end surface of the first part 2233. Along the inclined direction of the inclined surface 224, the inclined surface 224 has a first end and a second end. The first end coincides with the upper end surface of the first part 2233 and is closer to the outer surface of the first part 2233 than the second end. When an external force is applied to the inclined surface 224, the stop 223 can move away from the back side corresponding to the receiving part 2222, using the root of the stop 223 as a fulcrum. When the external force applied to the inclined surface 224 is removed, the stop 223 can move towards the initial position of the stop 223. Thus, when the temperature detection unit 6 is assembled, the temperature detection unit 6 contacts the inclined surface 224 and acts on the inclined surface 2233. 4. A force is applied so that the baffle 223 can move away from the back side corresponding to the receiving part 2222, so that the temperature detection unit 6 can enter the cavity corresponding to the receiving part 2222. When the temperature detection unit 6 enters the preset position of the cavity corresponding to the receiving part 2222, the temperature detection unit 6 will remove the force applied to the inclined surface 224, so that the baffle 223 can move closer to the initial position of the baffle 223 to the preset position. When the baffle 223 moves closer to the initial position of the baffle 223 to the preset position, the bottom surface of the second part 2234 abuts against the temperature detection part 62 of the temperature detection unit 6, or there is a gap between the bottom surface of the second part 2234 and the temperature detection part 62 of the temperature detection unit 6.

[0051] Compared with the first embodiment of limiting the stator assembly and temperature detection unit, in this embodiment, the limiting part 222 further includes a stop part 223, which abuts against the temperature detection unit 6 or has a gap between the stop part 223 and the temperature detection unit 6, and the stop part 223 can prevent the temperature detection unit 6 from disengaging from the limiting part 222.

[0052] It should be noted that the above embodiments are only used to illustrate this application and are not intended to limit the technical solutions described in this application. Although this specification has described this application in detail with reference to the above embodiments, those skilled in the art should understand that they can still make modifications or equivalent substitutions to this application. All technical solutions and improvements that do not depart from the spirit and scope of this application should be covered within the scope of the claims of this application.

Claims

1. An electronic oil pump, comprising a first rotor assembly, a second rotor assembly, and a stator assembly, wherein the second rotor assembly is drively connected to the first rotor assembly; characterized in that: The electronic oil pump has a first chamber and a second chamber. The first rotor assembly is located in the first chamber, and the stator assembly is located in the second chamber. The first chamber allows the flow of working medium and is in communication with the second chamber. At least a portion of the working medium in the first chamber can flow into the second chamber and contact the stator assembly. The stator assembly includes an insulating frame, which includes a first body portion and a limiting portion. Along the height direction of the insulating frame, the limiting portion protrudes from the first body portion. The limiting portion has a second body portion and a receiving portion. The receiving portion has a first opening formed on the end face of the second body portion. The electronic oil pump also includes a temperature detection unit. The temperature detection unit is at least partially located in the chamber corresponding to the receiving portion and is limited by the limiting portion. The receiving portion has a second opening formed on the outer side of the limiting portion. The limiting portion also includes at least one stop portion. The stop portion abuts against the temperature detection unit or there is a gap between the stop portion and the temperature detection unit. The stop portion can prevent the temperature detection unit from disengaging from the limiting portion through the second opening. The temperature detection unit can detect the temperature of the working medium located in the second chamber.

2. The electronic oil pump according to claim 1, characterized in that: The stator assembly includes a stator core and windings, with the insulating frame located on at least a portion of the surface of the stator core and the windings wound around the insulating frame.

3. The electronic oil pump according to claim 2, characterized in that: Along the height direction of the limiting portion, the receiving portion extends from the end face of the second body portion.

4. The electronic oil pump according to claim 2 or 3, characterized in that: The temperature detection unit includes a pin portion and a temperature probe portion, the temperature probe portion being electrically connected to the pin portion; along the height direction of the receiving portion, the pin portion extends out of the cavity corresponding to the receiving portion, and the temperature probe portion is tightly fitted to the side of the receiving portion corresponding to the receiving portion.

5. The electronic oil pump according to claim 2 or 3, characterized in that: At least a portion of the root of the baffle is connected to the side of the receiving portion corresponding to the receiving portion, or at least a portion of the root of the baffle is connected to the bottom surface of the receiving portion corresponding to the receiving portion. The back of the baffle abuts against the temperature detection unit, or there is a gap between the back of the baffle and the temperature detection unit.

6. The electronic oil pump according to claim 5, characterized in that: The limiting part includes two stops, one of which is defined as the first stop and the other as the second stop. At least a portion of the root of the first stop is connected to the first side of the receiving part, and at least a portion of the root of the second stop is connected to the second side of the receiving part. The first side and the second side of the receiving part are disposed opposite to each other. The first stop and the second stop are disposed opposite to each other. The first stop abuts against the temperature detection unit or there is a gap between the first stop and the temperature detection unit. The second stop abuts against the temperature detection unit or there is a gap between the second stop and the temperature detection unit.

7. The electronic oil pump according to claim 2 or 3, characterized in that: At least a portion of the root of the baffle is connected to the bottom surface corresponding to the receiving portion. Along the protruding direction of the limiting portion, the baffle protrudes relative to the bottom surface corresponding to the receiving portion. There is a preset distance between the first side surface of the baffle and the first side surface corresponding to the receiving portion, and there is a preset distance between the second side surface of the baffle and the second side surface corresponding to the receiving portion. At least a portion of the baffle is located on one side of the temperature detection unit. The height of the baffle is higher than the height of the temperature sensing part of the temperature detection unit. The baffle abuts against the temperature sensing part of the temperature detection unit or there is a gap between the baffle and the temperature sensing part of the temperature detection unit.

8. The electronic oil pump according to claim 7, characterized in that: The baffle includes a first part and a second part. At least a portion of the root of the first part is connected to the bottom surface corresponding to the receiving part. The second part protrudes from the inner side of the first part. The bottom surface of the second part abuts against the temperature sensing part of the temperature detection unit or there is a gap between the bottom surface of the second part and the temperature sensing part of the temperature detection unit.

9. The electronic oil pump according to claim 8, characterized in that: The second part has an inclined surface connected to the upper end face of the first part. Along the inclined direction of the inclined surface, the inclined surface has a first end and a second end. The first end coincides with the upper end face of the first part and is closer to the outer side of the first part than the second end. When an external force is applied to the inclined surface, the stop part can move away from the back side corresponding to the receiving part, with the root of the stop part as the fulcrum. When the external force applied to the inclined surface is removed, the stop part can move towards the initial position of the stop part to a preset position.

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