WO2024022482A1

WO2024022482A1 - Electric pump

Info

Publication number: WO2024022482A1
Application number: PCT/CN2023/109821
Authority: WO
Inventors: 朱淑婷; 刘莉莉; 郭瑶; 叶葳
Original assignee: 浙江三花汽车零部件有限公司
Priority date: 2022-07-29
Filing date: 2023-07-28
Publication date: 2024-02-01

Abstract

An electric pump. The electric pump has a first cavity, and when the electric pump works, a working medium is present in the first cavity. The electric pump comprises a control assembly and a rotating assembly, the control assembly is located in the first cavity, and at least part of the rotating assembly is located in the first cavity. The control assembly comprises a circuit board, a magnetic element and a sensor; the circuit board is in electrical connection and/or signal connection to the sensor; the end portion of the rotating assembly relatively close to the circuit board is fixedly connected or limitedly connected to the magnetic element; the circuit board comprises a first surface, and the first surface faces the magnetic element; at least part of the sensor is located on the first surface; the magnetic element is within the sensing range of the sensor; the projection of the magnetic element on the first surface at least partially overlaps the sensor, or the sensor is located in the projection range of the magnetic element on the first surface. The present application allows for better detection of rotation of electric pumps.

Description

an electric pump

This application is required to be submitted to the China Patent Office on July 29, 2022, with the application number 202210910293.1, and the invention name being "an electric pump", and to be submitted to the China Patent Office on July 29, 2022, with the application number 202210912059.2, and the invention name The priority of two Chinese patent applications for "an electric pump", the entire contents of which are incorporated into this application by reference.

【Technical field】

The present application relates to the field of vehicles, and in particular to components of vehicle lubrication systems and/or cooling systems.

【Background technique】

The electric pump mainly provides power source for the vehicle's lubrication system. When the electric pump is working, the circuit board is immersed in the working medium. At this time, how to monitor the rotation of the electric pump is a technical issue.

[Content of the invention]

The purpose of this application is to provide an electric pump that can better monitor the rotation of the electric pump.

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

An electric pump. The electric pump has a first cavity. When the electric pump works, there is a working medium in the first cavity. The electric pump includes a control component and a rotating component. The control component is located in the third cavity. A cavity, at least part of the rotating assembly is located in the first cavity, the control assembly includes a circuit board, a magnetic element and a sensor, the circuit board and the sensor are electrically and/or signal connected, the rotating assembly is opposite One end close to the circuit board is fixedly connected or limitedly connected to the magnetic element. The circuit board includes a first side facing the magnetic element, and at least part of the sensor is located on the first side. surface, the magnetic element is within the sensing range of the sensor, the projection of the magnetic element on the first surface at least partially overlaps with the sensor, or the sensor is located on the first surface of the magnetic element. within the projection range.

In the above technical solution, the sensor is electrically and/or signally connected to the circuit board, and the rotating component One end relatively close to the circuit board is fixedly connected or limitedly connected to the magnetic component. The magnetic component is within the sensing range of the sensor. The projection of the magnetic component on the first surface at least partially overlaps the sensor, or the sensor is located in the projection of the magnetic component on the first surface. In this way, the sensor and the magnetic element can be used to monitor the rotation of the electric pump.

[Picture description]

Figure 1 is a schematic diagram of an electric pump according to an embodiment of the present application;

Figure 2A is a first schematic view of the A-A section in Figure 1;

Figure 2B is an enlarged view of the first embodiment of part A in Figure 2A;

Figure 2C is an enlarged view of the second embodiment of part A in Figure 2A;

Figure 2D is a schematic diagram of the magnetic component in Figure 2C;

Figure 3 is a second schematic view of the A-A section in Figure 1;

Figure 4 is a schematic cross-sectional view of an electric pump according to another embodiment of the present application;

Figure 5A is a schematic diagram of the rotating shaft and the second rotor assembly according to an embodiment of the present application;

Figure 5B is a schematic side view of Figure 5A;

Figure 6A is a schematic diagram of the rotating shaft and the second rotor assembly according to an embodiment of the present application;

Figure 6B is a schematic side view of Figure 6A;

Figure 7A is a schematic diagram of the rotating shaft and the second rotor assembly according to an embodiment of the present application;

Figure 7B is a schematic side view of Figure 7A;

Figure 8A is a schematic diagram of the rotating shaft and the second rotor assembly according to an embodiment of the present application;

Figure 8B is a schematic side view of Figure 8A;

Figure 9A is a schematic diagram of the rotating shaft and the second rotor assembly according to an embodiment of the present application;

Figure 9B is a schematic side view of Figure 9A;

Figure 9C is a schematic diagram of the A-A section in Figure 9B;

Figure 10 is a schematic cross-sectional view of an electric pump according to an embodiment of the present application;

Figure 11 is an enlarged view of part A of the first embodiment in Figure 10;

Figure 12 is an enlarged view of part A of the second embodiment in Figure 10;

Figure 13 is a schematic diagram of the magnetic component in Figure 11 or Figure 12;

Figure 14 is an enlarged view of part A of the third embodiment in Figure 10 when no magnetic components are placed;

Figure 15 is an enlarged view of part A after placing the magnetic component in the third embodiment of Figure 10;

Figure 16 is an enlarged view of part A of the fourth embodiment in Figure 10;

Figure 17 is a schematic diagram of the magnetic component in Figure 15 or Figure 16;

Figure 18 is another schematic cross-sectional view of an electric pump according to an embodiment of the present application;

Figure 19 is a schematic cross-sectional view of an electric pump according to another embodiment of the present application;

Figure 20 is a schematic view of Figure 2A, Figure 4, Figure 10, Figure 18 or Figure 19 with the pump cover removed.

Reference signs: 1-pump casing, 11-pump cover, 12-first casing, 13-second casing, 2-pump assembly, 21-first rotor assembly, 211-first rotor, 212-second Rotor, 3-motor component, 31-second rotor component, 32-stator component, 32a-stator core, 32b-insulation frame, 32c-winding, 33-magnetic component, 331-upper magnetic surface, 332-lower magnetic surface , 333-second through hole, 334-second receiving hole, 335-through hole, 4-control component, 41-circuit board, 411-first side, 412-second side, 42-sensor, 5-inlet, 6-rotating shaft, 61/61'-first end, 611-first end surface, 612-first side surface, 62/62'-second end portion, 621-second end surface, 63-first receiving hole, 7-Ejection port, 8-Connection part, 81-Accommodating hole, 82-First through hole, 9-Anti-magnetic conduction part, 10-Hydraulic chamber, 20-First chamber, 30-Second chamber, 301-Bottom wall , 40-first channel, 401/401'-first opening, 402/402'-second opening, 50-second channel.

【Detailed ways】

The present application will be further described below in conjunction with the accompanying drawings and specific embodiments:

In order to enable those skilled in the art to better understand the technical solutions of the present application, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without exerting creative efforts. The locative terms such as upper and lower involved in this article are defined by the positions of the components shown in the drawings. They are only for the clarity and convenience of expressing the technical solution. It should be understood that the locative terms used in this article should not Limit the scope of protection claimed by this application.

Please refer to Figure 1, Figure 2A to Figure 2D, Figure 3, Figure 4, Figure 5A to 5B, Figure 6A to 6B, Figure 7A to 7B, Figure 8A to Figure 8B, Figure 9A to Figure 9C and Figure 10 to Figure 20, This application provides An electric pump is provided. The electric pump is installed, for example, in a driving device of a vehicle. The electric pump includes a pump housing 1, and a pump assembly 2, a motor assembly 3 and a control assembly 4 are provided in the pump housing 1. The motor assembly 3 receives power supply to generate rotational driving force. The control assembly 4 detects the rotation of the motor assembly 3. The pump assembly 2 is driven by the motor assembly 3 and sucks in the working medium, such as oil and other liquids.

Please refer to Figures 1 and 10. The pump housing 1 includes a pump cover 11, a first housing 12 and a second housing 13. The pump cover 11 is opposite to the first housing 12, and the first housing 12 is opposite to the second housing 13. Fixed connection, the pump cover 11, the first housing 12 and the second housing 13 are all made of metal. Of course, the material of the first housing 12 or the second housing 13 can also be made of metal, such as the pump cover. The material of 11 or the second housing 13 is plastic, and the material of the first housing 12 is metal. Alternatively, the material of the pump cover 11 and the second housing 13 can be plastic, and the material of the first housing 12 can be Metal. Specifically, in this embodiment, the pump cover 11 and the first housing 12 are connected by screws or bolts. If screws or bolts are driven from the inside of the pump toward the pump cover 11, the screws or bolts will not be easily corroded by the external environment. Improve the connection strength between the pump cover 11 and the first housing 12; if screws or bolts are driven from the pump cover 11 to the inside of the pump, the disassembly and assembly of the electric pump can be made more convenient, thereby facilitating the maintenance of the pump assembly 2 of the electric pump. Of course, The pump cover 11 and the first housing 12 can also be connected through other connection methods, such as plugging, snapping, etc.; the first housing 12 and the second housing 13 are fixedly connected. Specifically, the first housing 12 It is connected with the second housing 13 by screws or bolts. On the one hand, this arrangement makes the disassembly and assembly of the electric pump more convenient. In this embodiment, since the control assembly 4 is located in the space between the first housing 12 and the second housing 13 In the cavity, it is beneficial to the maintenance of the control component 4 in the electric pump. On the other hand, it can also make the connection between the first housing 12 and the second housing 13 more reliable. Of course, the first housing 12 and the second housing 13 can also be Through other connection methods such as plugging, snapping or bonding. Please refer to Figure 2A, Figure 3 to Figure 4, Figure 10 and Figure 18 to Figure 19, the gap between the pump cover (not shown), the first housing (not shown) and the second housing (not shown) The connection relationship is as described above and will not be described again here.

Please refer to Figure 1, Figure 2A to Figure 2D, Figure 3, Figure 4, Figure 5A to 5B, Figure 6A to 6B, Figure 7A to 7B, Figure 8A to Figure 8B, Figure 9A to Figure 9C and Figure 10 to Figure 20, The pump assembly 2 includes a first rotor assembly 21. The first rotor assembly 21 includes a first rotor 211 and a second rotor 212. The first rotor 211 includes a plurality of internal teeth, and the second rotor 212 includes a plurality of external teeth. The first rotor 211 A hydraulic chamber 10 is formed between the inner teeth of the second rotor 212 and the outer teeth of the second rotor 212 . In this embodiment, the pump assembly The rotation speed of 2 is the same as the rotation speed of motor assembly 3. In other embodiments, the rotational speed of the pump assembly 2 is different from the rotational speed of the motor assembly 3. For example, a reduction mechanism may be provided between the pump assembly 2 and the motor assembly 3. The motor assembly 3 includes a second rotor assembly 31 and a stator assembly 32. The stator assembly 32 surrounds the second rotor assembly 31 from the radial outer side of the second rotor assembly 31.

The electric pump also includes a rotating component, which is transmission connected with the second rotor component 31 and the first rotor component 21. The rotating component includes a rotating shaft 6, which can drive the first rotor 211 to rotate. In this embodiment, the rotating shaft 6 One side is connected to the second rotor 212, and the other side of the rotating shaft 6 is connected to the second rotor assembly 31. The second rotor assembly 31 drives the first rotor 211 to rotate through the rotating shaft 6, thereby realizing the rotation of the first rotor assembly 21. .

Please refer to Figure 1, Figure 2A to Figure 2D, Figure 3, Figure 4 and Figure 10 to Figure 20. The pump housing 1 can form the pump inner cavity, and the pump assembly 2, motor assembly 3 and control assembly 4 are located in the pump inner cavity. The cavity includes a first cavity 20 and a second cavity 30 . The second rotor assembly 31 (or part of the second rotor assembly 31 ), the control assembly 4 and part of the rotating assembly are located in the first cavity 20 . The first rotor assembly 21 is located in the second cavity 30 , the stator assembly 32 is electrically and/or signally connected to the circuit board 41, the stator assembly 32 (or at least part of the stator assembly 32) is located in the first cavity 20, the control assembly 4 and the stator assembly 32 are located in the same cavity, which can reduce the electric pump The size in the axial direction and the structure are compact, thereby reducing the production cost of the electric pump. The rotating shaft 6 is located inside the stator assembly 32; the stator assembly 32 includes a stator core 32a, an insulating frame 32b and a winding 32c. The insulating frame 32b at least covers at least part of the surface of the stator core 32a, and the winding 32c is wound around the insulating frame 32b; electric When the pump is working, the control component 4 controls the stator component 32 to generate a changing excitation magnetic field by controlling the current in the winding 32c of the stator component 32 to change according to a predetermined rule. The second rotor component 31 rotates under the action of the excitation magnetic field. The rotor assembly 31 can directly or indirectly drive the first rotor assembly 21 to rotate. When the first rotor assembly 21 rotates, there is a certain eccentricity between the first rotor 211 and the second rotor 212. When the second rotor 212 rotates, the second rotor 212 rotates. Part of the external teeth of the second rotor 212 mesh with part of the internal teeth of the first rotor 211, thereby driving the first rotor 211 to rotate. During one rotation of the first rotor 211 and the second rotor 212, the internal volume of the hydraulic chamber 10 changes. , specifically, when the first rotor assembly 21 rotates from the starting point to a certain angle, the volume in the hydraulic chamber 10 gradually increases to form a partial vacuum, and the working medium is sucked into the hydraulic chamber 10 from the inlet 5 of the electric pump. , when the first rotor 211 and the second rotor 212 continue to rotate, the volume of the hydraulic chamber 10 originally filled with working medium gradually decreases, The working medium is squeezed, so that the working medium entering the hydraulic chamber 10 is pressed out to the discharge port 7 of the electric pump to generate flow power.

Please refer to Figures 2A to 2D, Figures 3 to 4, and Figures 18 to 19. The first chamber 20 is connected with the second chamber 30. The electric pump includes a bottom wall 301, and the first chamber 20 is located on one side of the bottom wall 301. The second cavity 30 is located on the other side of the bottom wall 301. The bottom wall 301 supports the first rotor assembly 21. The electric pump includes a second channel 50 that runs through the upper and lower surfaces of the bottom wall 301. The second channel 50 The first cavity 20 and the second cavity 30 are connected. Specifically, the second channel 50 communicates with the first cavity 20 , and the second channel 50 communicates with the second cavity 30 . At least part of the working medium in the second chamber 30 can flow into the first chamber 20 through the second channel 50 and come into contact with at least part of the control assembly 4 located in the first chamber 20, so that the working medium located in the first chamber 20 can contact with The heat generated by the control component 4 undergoes heat exchange, which is beneficial to the heat dissipation of the control component 4, which is beneficial to increasing the service life of the electric pump; further, at least part of the stator component 32 can also be in contact with the working medium located in the first cavity 20 , so that the working medium located in the first cavity 20 can conduct heat exchange with the heat generated by the stator assembly 32, thereby facilitating the heat dissipation of the stator assembly 32.

Please refer to Figures 2A to 2D and 3. The electric pump also includes a first channel 40. The first channel 40 is connected with the first cavity 20. The rotating assembly includes a first end 61. The first end 61 is smaller than the second rotor assembly. 31 is close to the circuit board 41, the first channel 40 has a first opening 401 on the side wall of the first end 61, the rotating assembly includes a second end 62, along the axial direction of the electric pump, the second end 62 is The first end 61 is away from the circuit board 41 , and the first channel 40 has a second opening 402 on a side wall of the second end 62 . Part of the working medium in the first chamber 20 can leave the first chamber 20 through the first channel 40. Along the axial direction of the electric pump, the second opening 402 of the first channel 40 is closer to the first opening 401 of the first channel 40. At the inlet 5 of the electric pump, the pressure of the working medium at the inlet of the second channel 50 is greater than the pressure of the working medium at the second opening 402 of the first channel 40 , so that the pressure of the working medium at the inlet of the second channel 50 and the first channel 40 A pressure difference is formed at the second opening 402. According to the principle that the working medium flows from a place with high pressure to a place with low pressure, the working medium in the first chamber 20 can flow in the direction of the second opening 402 of the first channel 40, That is, the working medium in the first cavity 20 can leave the first cavity 20 through the first channel 40. Since the stator assembly 32 and the control assembly 4 are located in the first cavity 20, the working medium can take away the components of the stator assembly 32 and the control assembly 4. part of the heat, thereby further improving the heat dissipation efficiency of the stator assembly 32 and the control assembly 4 .

Figure 3 shows the flow direction of the working medium. Please refer to Figure 3 and Figure 20. The electric pump includes an inlet 5. The inlet 5 is connected with the second chamber 30. The working medium has two flow directions. In the first flow direction of the working medium In S1 (shown by the thick dotted line), the working medium flows into the hydraulic chamber 10 of the first rotor assembly 21 from the inlet 5, and then the working medium flows out of the hydraulic chamber 10 from the discharge port 7; in the second flow direction S2 (thick solid line) of the working medium (as shown), part of the working medium entering the hydraulic chamber 10 of the first rotor assembly 21 flows into the first chamber 20 through the second channel 50, and then the working medium in the first chamber 20 flows into the first channel 40 through the first opening 401.

2A to 2B, 3, 5A to 5B, 6A to 6B, 7A to 7B, 8A to 8B and 9A to 9C, the first channel 40 includes a second opening 402 and at least one first opening 401. Further, as shown in FIGS. 8A to 8B, the number of the first openings 401 is at least two. The first openings 401 are arranged in the radial direction of the rotation axis 6 or the first openings 401 are arranged along the rotation axis. The axial arrangement of the shaft 6 has a spacing between adjacent first openings 401, and the first channel 40 has multiple first openings 401, which can increase the flow rate of the working medium flowing into the first channel 40 from the first chamber 20 per unit time, Thus, the heat dissipation effect on the control component 4 is improved. Please refer to Figure 2A, Figure 2C and Figure 2D. The magnetic element 33 is fixedly connected or limitedly connected with the first end 61. Specifically, the first end 61 includes a first end surface 611, and the magnetic element 33 is fixed with the first end surface 611. For connection or limiting connection, the magnetic element 33 includes a second through hole 333 , the second through hole 333 is connected to the first channel 40 , and the second through hole 333 is connected to the first cavity 20 .

Please refer to FIGS. 5A to 5B , combined with FIG. 3 or 4 , the first end 61 is located on the rotating shaft 6 , the first end 61 includes a first end surface 611 and a first side 612 , and part of the first opening 401 is located on the first On the end face 611 , part of the first opening 401 is located on the first side 612 . The magnetic element 33 is fixedly connected or limitedly connected with the first end face 611 , and the first opening 401 communicates with the first cavity 20 . In this way, on the one hand, the rotating component is drivingly connected to the second rotor component 31, the magnetic element 33 is fixedly connected or limitedly connected to the first end surface 611 of the rotating component, the first end 61 is relatively close to the circuit board (or sensor), and the magnetic element 33 Cooperating with the sensor, the rotation of the second rotor assembly 31 can be monitored; on the other hand, the working medium in the first cavity 20 can flow out of the first cavity 20 from the first opening 401 because the stator assembly 32 and the control assembly 4 are located in the first cavity 20 , the working medium can take away part of the heat of the stator assembly 32 and the control assembly 4 through the first opening 401 .

Please refer to Figures 7A to 7B, and in combination with Figure 3 or Figure 4, the rotating shaft 6 includes a first side 612, The first channel 40 has a first opening 401 on the first side 612, and the first cavity 20 is in communication with the first opening 401. The working medium flows into the first channel 40 from the first opening 401, and flows out from the second opening 402 to leave the first channel 40. Part of the working medium that has undergone heat exchange with the control component 4 can flow away through the first channel 40, and the working medium can be maintained at a certain level. fluidity, thereby ensuring the heat dissipation effect of the working medium on the control component 4. Please refer to FIGS. 8A to 8B , combined with FIG. 3 or 4 , the rotation axis 6 includes a first side 612 , the first channel 40 has at least two first openings 401 on the first side 612 , and the first openings 401 are along the rotation axis. The radial arrangement of 6 and/or the first opening 401 is arranged along the axial direction of the rotation shaft 6 . The first cavity 20 communicates with the first opening 401 . The working medium flows into the first channel 40 from the first opening 401, and flows out from the second opening 402 to leave the first channel 40. Part of the working medium that has undergone heat exchange with the control component 4 can flow away through the first channel 40, and the working medium can be maintained at a certain level. fluidity, thereby ensuring the heat dissipation effect of the working medium on the control component 4.

Please refer to Figure 4. Figure 4 is a schematic diagram of another embodiment of the electric pump of the present application. The difference from the embodiment shown in Figure 3 is at least the flow direction of the working medium. Please refer to Figures 4 and 20. The first cavity 20 is connected with the second cavity 30. In this embodiment, the first cavity 20 and the second cavity 30 are connected through the second channel 50. Part of the working medium in the first cavity 20 can flow into the second cavity 30 through the second channel 50. , the working medium in the first cavity 20 is in at least partial contact with the control component 4 located in the first cavity 20, so that the working medium located in the first cavity 20 can conduct heat exchange with the heat generated by the control component 4, thereby having It is conducive to the heat dissipation of the control component 4, which is beneficial to improving the service life of the electric pump; further, at least part of the stator component 32 can also be in contact with the working medium located in the first cavity 20, so that the working medium located in the first cavity 20 can contact with the working medium located in the first cavity 20. The heat generated by the stator assembly 32 undergoes heat exchange, thereby facilitating heat dissipation of the stator assembly 32 .

The electric pump also includes a first channel 40. The rotating assembly includes a first end (not shown). The first end (not shown) is closer to the circuit board (not shown) than the second rotor assembly 31. The first channel 40 The side wall of the first end (not shown) has a first opening 401. The rotating assembly includes a second end 62. The second end 62 is farther away from the first end 61 along the axial direction of the electric pump. In the circuit board, the first channel 40 has a second opening 402 at a second end (not shown) (for example, the end surface of the second end). The working medium enters the first chamber 20 from the inlet 5 through the first channel 40. Along the axial direction of the electric pump, the second opening 402 of the first channel 40 is closer to the inlet 5 of the electric pump than the first opening 401 of the first channel 40. , the pressure of the working medium at the second opening 402 of the first channel 40 is greater than the working medium. The pressure of the working medium at the outlet of the second channel 50 causes the working medium to form a pressure difference between the second opening 402 of the first channel 40 and the outlet of the second channel 50. According to the working medium, the working medium moves from a place with high pressure to a place with low pressure. According to the principle of local flow, the working medium in the first cavity 20 can flow toward the exit of the second channel 50. Since the stator assembly 32 and the control assembly 4 are located in the first cavity 20, the working medium can take away the stator assembly 32 and the control assembly 4. Part of the heat of the control component 4 is thereby further improved to further improve the heat dissipation efficiency of the stator component 32 and the control component 4 .

Figure 4 shows the flow direction of the working medium. Please refer to Figure 3 and Figure 20. The electric pump includes an inlet 5. The inlet 5 is connected to the second opening 402. The working medium has two flow directions. In the first flow direction of the working medium In S1 (shown by the thick dotted line), part of the working medium flowing in from the inlet 5 enters the hydraulic chamber 10 of the first rotor assembly 21, and then the working medium flows out of the hydraulic chamber 10 from the discharge port 7; in the second flow direction of the working medium S2 ( (shown by thick solid lines), part of the working medium flowing in from the inlet 5 enters the first chamber 20 through the first channel 40, and part of the working medium in the first chamber 20 flows into the second chamber 30 through the second channel 50, and then the second chamber 30 Part of the working medium 30 flows out from the ejection port 7.

2A to 2D, 3 to 4, 5A to 5B, 6A to 6B, 7A to 7B and 8A to 8B, the control assembly 4 includes a circuit board 41, a magnetic component 33 and a The sensor 42 is electrically and/or signally connected to the circuit board 41. The sensor 42 senses the magnetic field of the magnetic element 33. The magnetic element 33 includes opposite upper magnetic surfaces 331 and lower magnetic surfaces 332. Along the axial direction of the electric pump, the upper The magnetic surface 331 is away from the circuit board 41 relative to the lower magnetic surface 332. The first end 61 includes a first end surface 611. The magnetic element 33 is fixed on the first end surface 611. Along the axial direction of the electric pump, the lower magnetic surface 332 of the magnetic element 33 Compared with the first end surface 611 being close to the circuit board 41 , the magnetic element 33 is closer to the sensor 42 , and the sensor 42 has higher sensing accuracy.

Please refer to Figures 9A to 9C. Figures 9A to 9C are schematic diagrams of the rotating shaft 6 and the second rotor assembly 31 according to an embodiment of the present application. Please refer to Figures 3 and 9A to 9C. The rotating assembly includes a connecting portion 8. The connecting portion 8 It includes a receiving hole 81, at least part of the rotating shaft 6 is located in the receiving hole 81, the side wall forming the receiving hole 81 is fixedly connected or limitedly connected with at least part of the outer wall of the rotating shaft 6, the connecting part 8 includes a first through hole 82, A through hole 82 communicates with the first opening 401 of the first channel 40, the magnetic element 33 is fixedly connected or limitedly connected with the outer wall of the connecting part 8, the first cavity 20 and the first channel 40 pass through the first opening 401 and the first The through holes 82 are connected. The magnetic element 33 rotates together with the rotating shaft 6 through the connecting part 8. On the one hand, the magnetic element 33 can be brought close to the sensor 42 through the connecting part 8. Improve the accuracy of the sensor 42 sensing the magnetic element 33; on the other hand, the rotating shaft 6 is generally made of metal, and the connecting portion 8 can reduce the influence of metal on the magnetic induction lines of the magnetic element 33, thereby improving the accuracy of the control component 4 sensing magnetism.

Please refer to Figures 6A to 6B. Figures 6A to 6B are schematic diagrams of the rotating shaft 6 and the second rotor assembly 31 according to an embodiment of the present application. The rotating assembly includes an anti-magnetic conductive portion 9. Along the axial direction of the electric pump, the magnetic element 33 is located on one side of the anti-magnetic conductive part 9, and the rotating shaft 6 is located on the other side of the anti-magnetic conductive part 9. The magnetic element 33 is fixed to the side wall of the anti-magnetic conductive part 9 or the magnetic element 33 and the anti-magnetic conductive part 9 are integrated. . The material of the rotating shaft 6 is generally metal, and the anti-magnetic conductive part 9 can reduce the influence of metal on the magnetic induction lines of the magnetic element 33, thereby improving the induction accuracy of the control component 4.

Please refer to Figures 10 to 20, the electric pump also includes a rotating shaft 6, which is transmission connected with the second rotor assembly 31. The rotating shaft 6 includes a first end 61' and a second end 62', along the rotating shaft 6 In the axial direction, the first end 61' is further away from the circuit board 41 than the second end 62', the second end 62' is located in the first cavity 20, and the first end 61' is drivingly connected to the first rotor assembly 21. The first chamber 20 is connected with the second chamber 30. The electric pump includes a bottom wall 301. The first chamber 20 is located on one side of the bottom wall 301. The second chamber 30 is located on the other side of the bottom wall 301. The bottom wall 301 supports the first rotor. The assembly 21 and the electric pump include a second channel 50 , the second channel 50 runs through the upper surface and the lower surface of the bottom wall 301 , and the second channel 50 communicates with the first chamber 20 and the second chamber 30 .

Please refer to Figures 10 to 18. The electric pump also includes a first channel 40. The first channel 40 has a first opening 401' and a second opening 402'. The first opening 401' is located at the first end 61' of the rotating shaft 6. , the second opening 402' communicates with the first cavity 20. In some embodiments, the second end 62' includes a first end face 611, the first channel 40 has a second opening 402' at the first end face 611, and the first end 61' includes a second end face 621, The first channel 40 has a first opening 401' on the second end surface 621. Part of the working medium in the first chamber 20 can leave the first chamber 20 through the first channel 40. Along the axial direction of the electric pump, the first opening 401' of the first channel 40 is compared with the second opening 402 of the first channel 40. 'Close to the inlet 5 of the electric pump, the pressure of the working medium at the inlet of the second channel 50 is greater than the pressure of the working medium at the first opening 401' of the first channel 40, so that the pressure of the working medium at the inlet of the second channel 50 and the first opening 401' of the first channel 40 A pressure difference is formed at the first opening 401' of a channel 40. According to the principle that the working medium flows from a place with high pressure to a place with low pressure, the working medium in the first chamber 20 can flow toward the first opening of the first channel 40. Flow in the direction of opening 401', that is, through the first channel 40, the first cavity The working medium in 20 can leave the first cavity 20. Since the stator assembly 32 and the control assembly 4 are located in the first cavity 20, the working medium can take away part of the heat of the stator assembly 32 and the control assembly 4, thereby further improving the performance of the stator assembly 32. and control the heat dissipation efficiency of component 4.

Figure 18 shows the flow direction of the working medium. Please refer to Figure 18 and Figure 20. The electric pump includes an inlet 5. The inlet 5 is connected with the first chamber 20. The working medium has two flow directions. In the first flow direction of the working medium In S1 (shown by the thick dotted line), the working medium flows into the hydraulic chamber 10 of the first rotor assembly 21 from the inlet 5, and then the working medium flows out of the hydraulic chamber 10 from the discharge port 7; in the second flow direction S2 (thick solid line) of the working medium As shown in ), part of the working medium entering the hydraulic chamber 10 of the first rotor assembly 21 flows into the first chamber 20 through the second channel 50, and then the working medium in the first chamber 20 flows into the first channel 40 through the second opening 402'. .

Please refer to Figure 19. Figure 19 is a schematic diagram of another embodiment of the electric pump of the present application. The difference from the embodiment shown in Figure 18 is at least the flow direction of the working medium. Please refer to Figures 19 and 20. Part of the working medium in one cavity 20 can flow into the second cavity 30 through the second channel 50 , and the working medium in the first cavity 20 contacts at least part of the control assembly 4 located in the first cavity 20 , so that the working medium located in the first cavity 20 The working medium inside can conduct heat exchange with the heat generated by the control component 4, which is beneficial to the heat dissipation of the control component 4, which is beneficial to improving the service life of the electric pump; further, at least part of the stator component 32 can also be connected with the first stator component 32. The working medium in the cavity 20 is in contact, so that the working medium located in the first cavity 20 can conduct heat exchange with the heat generated by the stator assembly 32 , thereby facilitating heat dissipation of the stator assembly 32 .

Please refer to Figure 19. The second end 62' includes a first end face, and the first end 61' includes a second end face. The electric pump also includes a first channel 40, and the first channel 40 is configured to penetrate the first end face and the second end face. . The electric pump includes an inlet 5, which is connected with the first opening 401'. The working medium enters the first cavity 20 from the inlet 5 through the first channel 40. Along the axial direction of the electric pump, the first opening 401' of the first channel 40 is in contact with each other. Compared with the second opening 402' of the first channel 40, which is closer to the inlet 5 of the electric pump, the pressure of the working medium at the first opening 401' of the first channel 40 is greater than the pressure of the working medium at the outlet of the second channel 50, so that the work The medium forms a pressure difference at the first opening 401' of the first channel 40 and the outlet of the second channel 50. According to the principle that the working medium flows from a place with high pressure to a place with low pressure, the working medium in the first chamber 20 It can flow toward the outlet of the second channel 50. Since the stator assembly 32 and the control assembly 4 are located in the first cavity 20, the working medium can take away the stator assembly 32. and part of the heat of the control assembly 4, thereby further improving the heat dissipation efficiency of the stator assembly 32 and the control assembly 4.

Please refer to Figures 10 to 20. The control component 4 includes a circuit board 41, a magnetic component 33 and a sensor 42. The sensor 42 is electrically and/or signally connected to the circuit board 41. The sensor 42 senses the magnetic field of the magnetic component 33. The rotation axis 6 is opposite to the circuit board 41. One end close to the circuit board 41 is fixedly or limitedly connected to the magnetic element 33 . Specifically, the magnetic element 33 is fixedly or limitedly connected to the second end 62 ′.

Please refer to Figure 14, Figure 15 and Figure 17. The second end portion 62' has a first receiving hole 63. At least part of the magnetic element 33 is located in the first receiving hole 63. The side wall of the first receiving hole 63 and the magnetic element 33 are formed. The outer peripheral side (or the outer peripheral wall of the magnetic element 33) is fixedly connected or limitedly connected. In Figure 15, the side wall of the first receiving hole 63 forms a step, and the outer peripheral wall of the magnetic element 33 is in contact with the step. The second opening 402' of the first channel 40 is located on the outer wall of the second end 62', or the magnetic element 33 has a through hole 335 connected with the first channel 40, and the through hole 335 of the magnetic element 33 is connected with the first cavity 20 . On the one hand, arranging the magnetic element 33 radially inside the rotating shaft 6 can reduce the size of the electric pump in the axial direction and make the structure compact, thereby reducing the production cost of the electric pump; on the other hand, the work in the first chamber 20 The medium can flow out of the first cavity 20 from the through hole 335 and the second opening 402'. Since the stator assembly 32 and the control assembly 4 are located in the first cavity 20, the working medium can take away the stator assembly 32 through the through hole 335 and the second opening 402'. and control part of the heat of component 4.

Please refer to Figures 16 and 17. The second end 62' includes a first end surface 611. The magnetic element 33 is fixedly or limitedly connected to the first end surface 611. The magnetic element 33 includes a through hole 335, and the through hole 335 is connected to the second opening. 402' is connected, and the through hole 335 is connected with the first cavity 20. On the one hand, the magnetic element 33 is fixedly connected or limitedly connected with the first end face 611. The magnetic element 33 is closer to the sensor 42, and the sensor 42 senses the magnetic element 33 with higher accuracy; on the other hand, the working medium in the first cavity 20 The first cavity 20 can flow out of the through hole 335 and the second opening 402'. Since the stator assembly 32 and the control assembly 4 are located in the first cavity 20, the working medium can take away the stator assembly 32 and the second opening 402' through the through hole 335. Control part of the heat of component 4.

Please refer to FIGS. 11 to 13 , the magnetic element 33 has a second receiving hole 334 , at least part of the second end 62 ′ is located in the second receiving hole 334 , and the outer peripheral side of the second end 62 ′ is in contact with the second receiving hole 334 . The side wall is fixedly connected or limitedly connected. The second end 62' includes a first end surface 611. The channel 40 has a second opening 402' on the first end face 611. On the one hand, arranging the magnetic element 33 radially outside the rotating shaft 6 can reduce the size of the electric pump in the axial direction and make the structure compact, thereby reducing the cost of the electric pump. production cost; on the other hand, the working medium in the first cavity 20 can flow out of the first cavity 20 from the second opening 402'. Since the stator assembly 32 and the control assembly 4 are located in the first cavity 20, the working medium can pass through the second opening 402 'Take away part of the heat from the stator assembly 32 and the control assembly 4.

Please refer to Figures 10 and 11. Along the radial direction of the rotating shaft 6, the rotating shaft 6 is located on one side of the anti-magnetic conductive part 9, and the magnetic element 33 is located on the other side of the anti-magnetic conductive part 9. Specifically, the anti-magnetic conductive part 9 The portion 9 is located on the outer periphery of the rotating shaft 6 , and the magnetic element 33 is located on the outer periphery of the anti-magnetic conduction portion 9 . The anti-magnetic conduction part 9 is fixed to the wall of the magnetic element 33 or the anti-magnetic permeability part 9 and the magnetic element 33 are integrally constructed. The material of the rotating shaft 6 is generally metal, and the anti-magnetic conductive part 9 can reduce the influence of metal on the magnetic induction lines of the magnetic element 33, thereby improving the accuracy of the induced magnetic field of the control component.

Please refer to Figures 2A to 2D, Figures 3 to 4, Figures 5A to 5B, Figures 6A to 6B, Figures 7A to 7B, Figures 8A to 8B, Figures 9A to 9C, and Figures 10 to 20, The circuit board 41 includes a first side 411 and a second side 412. The first side 411 faces the magnetic element 33 or the stator assembly 32. At least part of the sensor 42 is located on the first side 411 of the circuit board 41. The sensor 42 is, for example, a magnetic sensor such as a Hall integrated circuit (IC) or a magnetoresistive element. When the magnetic element 33 rotates, the magnetic flux changes. The sensor 42 detects the change in magnetic flux caused by the rotation of the magnetic element 33. Due to the rotating assembly, (or the rotating shaft 6 ) is drivingly connected to the second rotor assembly 31 , so that the position of the second rotor assembly 31 can be detected. In some embodiments, the sensor 42 may also be an encoder. Along the axial direction of the electric pump or along the axial direction of the rotation shaft 6, there is a predetermined gap between the magnetic element 33 and the sensor 42, and the projection shape of the magnetic element 33 on the first surface 411 is circular or substantially circular ( When the shape of the magnetic element 33 changes, the projected shape of the magnetic element 33 will change accordingly), and the sensor 42 can fall within the projection range of the magnetic element 33 on the first surface 411. For example, the projected shape of the magnetic element 33 on the first surface 411 is a circle. shape, the sensor 42 falls within a circle, or the projection of the magnetic element 33 on the first surface 411 at least partially overlaps the sensor 42. In this way, the magnetic induction lines are denser, the magnetic field is stronger, and the sensing accuracy of the sensor 42 is high. ; Further, the central axis of the rotating shaft 6 passes through the sensor 42 or an extension of the central axis of the rotating shaft 6 passes through the sensor 42. In some embodiments, the magnetic element 33 includes an upper magnetic surface 331 and a lower magnetic surface 332, and the upper magnetic surface 331 is farther away from the control assembly 4 (or circuit board 41) relative to the lower magnetic surface 332 along the axis of the rotation shaft 6, The axial distance between the sensor 42 and the lower magnetic surface 332 of the magnetic element 33 is no more than 2cm. On the one hand, the accuracy of the sensor 42 can be ensured. On the other hand, the working medium can have a flow channel with a certain width, ensuring that the working medium controls the The heat dissipation effect of component 4. Further, the axial distance between the sensor 42 and the lower magnetic surface 332 is not greater than 1 cm. Further, the axial distance between the sensor 42 and the lower magnetic surface 332 is not greater than 6 mm. Of course, on the premise that the axial distance between the sensor 42 and the lower magnetic surface 332 is not greater than 2 cm, the sensor 42 can be disposed at other positions on the second surface 412 .

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

Claims

An electric pump, characterized in that the electric pump has a first chamber (20). When the electric pump is working, there is a working medium in the first chamber (20). The electric pump includes a control component (4 ) and a rotating component, the control component (4) is located in the first cavity (20), at least part of the rotating component is located in the first cavity (20), the control component (4) includes a circuit board (41 ), magnetic element (33) and sensor (42), the circuit board (41) and the sensor (42) are electrically and/or signally connected, and the rotating component is relatively close to one end of the circuit board (41) The circuit board (41) includes a first surface (411), and the first surface (411) faces the magnetic component (33), at least partially. The sensor (42) is located on the first surface (411), the magnetic element (33) is within the sensing range of the sensor (42), and the magnetic element (33) is on the first surface (411). ) at least partially overlaps with the sensor (42); or the sensor (42) is located within the projection range of the magnetic element (33) on the first surface (411).
The electric pump according to claim 1, characterized in that the rotating component includes a first end (61), and the magnetic element (33) is fixedly connected or limitedly connected with the first end (61). , the electric pump has a first channel (40), the first channel (40) has a first opening (401) on the side wall of the first end (61), the first channel (40) Communicated with the first cavity (20).
The electric pump according to claim 1, characterized in that the rotating assembly includes a rotating shaft (6), the rotating shaft (6) includes a first end (61), and the first end (61) Including a first end surface (611) and a first side surface (612), the electric pump has a first channel (40), the first channel (40) has a first opening (401), and part of the first opening (401) 401) is located on the first end face (611), part of the first opening (401) is located on the first side (612), and the magnetic element (33) is fixedly connected to the first end face (611) or Limited connection, the first opening (401) communicates with the first cavity (20).
The electric pump according to claim 2, characterized in that the rotating component includes a rotating shaft (6), the rotating shaft (6) includes the first end (61), and the first end (61) It includes a first end face (611) and a first side face (612), the magnetic element (33) is fixedly connected or limitedly connected with the first end face (611), and the first channel (40) is in the first end face (611). One side(612) There are at least two first openings (401), the first openings (401) are arranged along the radial direction of the rotation axis (6) and/or the first openings (401) are arranged along the rotation axis (6) 6) In the axial arrangement, the first opening (401) is connected with the first cavity (20).
The electric pump according to any one of claims 2 to 4, characterized in that the rotating assembly includes a rotating shaft (6) and an anti-magnetic conductive part (9), and along the axial direction of the electric pump, the magnetic The element (33) is located on one side of the anti-magnetic conduction part (9), the rotation shaft (6) is located on the other side of the anti-magnetic conduction part (9), the magnetic element (33) and the The side walls of the anti-magnetic conduction part (9) are fixed or the magnetic element (33) and the anti-magnetic conduction part (9) are integrally constructed.
The electric pump according to any one of claims 2 to 4, characterized in that the rotating assembly includes a rotating shaft (6) and a connecting part (8), and the connecting part (8) includes a receiving hole (81), At least part of the rotation shaft (6) is located in the accommodation hole (81), and the side wall forming the accommodation hole (81) is fixedly connected or limitedly connected with at least part of the outer wall of the rotation shaft (6). The magnetic element (33) is fixedly connected or limitedly connected with the outer wall of the connecting part (8). The connecting part (8) includes a first through hole (82), and the first through hole (82) is connected to the outer wall of the connecting part (8). The first opening (401) is connected to the first cavity (20), and the first through hole (82) is connected to the first cavity (20).
The electric pump according to any one of claims 2-4, characterized in that the first end (61) includes a first end face (611), the magnetic element (33) and the first end face (611) 611) fixed connection or limited connection, the magnetic element (33) includes a second through hole (333), the second through hole (333) is connected with the first channel (40), the second through hole (333) The hole (333) communicates with the first cavity (20).
The electric pump according to claim 5, characterized in that the first end (61) includes a first end face (611), and the magnetic element (33) is fixedly connected to the first end face (611) or Limiting connection, the magnetic element (33) includes a second through hole (333), the second through hole (333) is connected with the first channel (40), and the second through hole (333) is connected with the first channel (40). The first chamber (20) is connected.
The electric pump according to claim 1, characterized in that the electric pump includes a first rotor assembly (21) and a second rotor assembly (31), and the electric pump has a second chamber (30) and a first channel. (40), the first rotor assembly (21) is located in the second cavity (30), the rotating assembly includes a rotating shaft (6), and the second rotor assembly (31) is located in the first cavity (30). 20)and It is transmission connected with the rotating shaft (6); the rotating shaft (6) includes a first end (61') and a second end (62'). Along the axial direction of the rotating shaft (6), the The first end (61') is farther from the circuit board (41) than the second end (62'), and the first channel (40) has a first opening (401') and a second opening ( 402'), the first opening (401') is located at the first end (61'), the second opening (402') is connected to the first cavity (20), and the second end The first end (61') is located in the first cavity (20), the first end (61') is drivingly connected to the first rotor assembly (21), and the magnetic element (33) is connected to the second rotor assembly (21). End (62') fixed connection or limited connection.
The electric pump according to claim 9, characterized in that the second end (62') has a first receiving hole (63), and at least part of the magnetic element (33) is located in the first receiving hole (63). 63), the side wall forming the first receiving hole (63) is fixedly connected or limitedly connected with the outer peripheral side of the magnetic element (33), and the second opening (402') of the first channel (40) Located on the outer wall of the second end (62').
The electric pump according to claim 9, characterized in that the magnetic element (33) has a second receiving hole (334), and at least part of the second end (62') is located in the second receiving hole (334). 334), the outer peripheral side of the second end (62') is fixedly connected or limitedly connected with the side wall forming the second receiving hole (334), and the second end (62') includes a first End face (611), the first channel (40) has the second opening (402') on the first end face (611).
The electric pump according to claim 9, characterized in that the second end (62') includes a first end face (611), and the magnetic element (33) is fixedly connected to the first end face (611). Or limited connection, the magnetic element (33) has a through hole (335), the through hole (335) is connected with the first opening (401'), the through hole (335) is connected with the first opening (401'). The cavities (20) are connected.
The electric pump according to any one of claims 9-12, characterized in that the electric pump includes an anti-magnetic permeability part (9), and in the radial direction of the rotation axis (6), the magnetic element (33 ) is located on one side of the anti-magnetic conduction part (9), and the rotation shaft (6) is located on the other side of the anti-magnetic permeability part (9). The anti-magnetic conduction part (9) and the magnetic The inner wall of the component (33) is fixed or the anti-magnetic conduction part (9) is integrally constructed with the magnetic component (33).
The electric pump according to claim 2, characterized in that the magnetic element (33) includes an upper magnetic surface (331) and a lower magnetic surface (332), and along the axial direction of the rotation shaft (6), the upper magnetic surface noodle (331) is away from the circuit board (41) relative to the lower magnetic surface (332), and the axial distance between the lower magnetic surface (332) and the sensor (42) is not greater than 2cm.
The electric pump according to claim 2 or 14, characterized in that the electric pump includes a bottom wall (301), the electric pump has a second cavity (30), and in the axial direction of the electric pump, the second cavity The cavity (30) is located on one side of the bottom wall (301), the first cavity is located on the other side of the bottom wall (301), the electric pump includes a second channel (50), the second The channel (50) penetrates the upper surface and the lower surface of the bottom wall (301), and the second channel (50) communicates with the first cavity (20) and the second cavity (30).