Motor pump, suspension system and vehicle device

Abstract

The application discloses a motor pump, a suspension system and a vehicle device. The motor pump comprises a motor, a pump and a medium flow channel. The motor comprises a motor shell, a motor shaft, a stator, a rotor and a motor bearing. The pump is connected to an axial end of the motor, and the pump has a pump shell, a pump driving part and a pump bearing. The medium flow channel is arranged in the motor, one end of the medium flow channel is communicated with a high-pressure area in the pump shell, the other end of the medium flow channel is communicated with a low-pressure area in the pump shell, and the medium flow channel is communicated with bearing gaps of the motor bearing and the pump bearing. The medium flow channel comprises at least two of a first flow channel defined through a gap between the stator and the rotor, a second flow channel arranged in the motor shaft and a third flow channel arranged in the motor shell of the motor. The embodiment of the application can utilize the medium in the medium flow channel to lubricate and cool the bearings, and can also carry away the heat generated by the stator, the rotor and / or the controller, thereby improving the lubricating performance and the cooling performance of the motor pump.

Description

Technical Field

[0001] This invention belongs to the field of vehicle manufacturing technology, and specifically relates to an electric motor pump, a suspension system, and vehicle equipment. Background Technology

[0002] An electric pump consists of an electric motor and a pump. The electric motor drives the pump to pump hydraulic media to provide hydraulic power.

[0003] During operation, the bearings inside the motor and the pump need to be lubricated to form an oil film to improve mechanical performance and service life. If the heat dissipation performance of the motor and / or controller is poor, the temperature will be too high, which will accelerate the wear and aging of the components and affect the efficiency of the motor. Summary of the Invention

[0004] The present invention aims to at least partially solve one of the technical problems in the related art.

[0005] Therefore, embodiments of the present invention propose an electric motor pump that can improve lubrication and heat dissipation performance.

[0006] An embodiment of the present invention further proposes a suspension system.

[0007] Embodiments of the present invention also propose a vehicle device.

[0008] The electric pump of this invention includes:

[0009] An electric motor, the electric motor comprising a motor housing, a motor shaft arranged in the inner cavity of the motor housing, a stator, a rotor, and motor bearings;

[0010] A pump connected to one axial end of the motor, the pump having a pump housing, a pump drive component and a pump bearing;

[0011] A medium flow channel is arranged inside the motor. One end of the medium flow channel is connected to the high-pressure area inside the pump housing, and the other end of the medium flow channel is connected to the low-pressure area inside the pump housing. The medium flow channel is connected to the bearing clearance of the motor bearing and the pump bearing.

[0012] The medium flow channel includes at least two of a first flow channel defined by the gap between the stator and the rotor, a second flow channel arranged in the motor shaft, and a third flow channel arranged in the motor housing of the motor.

[0013] The electric motor pump of this invention can use the medium flowing in the medium channel to lubricate and dissipate heat from the bearings, and can also carry away the heat generated by the stator, rotor and / or controller, thereby improving the lubrication and heat dissipation performance of the electric motor pump.

[0014] In some embodiments, the medium flow channel includes at least the first flow channel, and the hollow area inside the rotor is injection molded or potted to prevent the medium from flowing in. The medium flow channel also includes a first groove, which is formed on the outer wall of the motor shaft, and / or the motor housing, and / or the pump housing. The first groove is connected to the end of the first flow channel near the pump, and the first groove is connected to the low-pressure area or high-pressure area inside the pump housing.

[0015] In some embodiments, the motor further includes a magnetic ring shaft connected to the end of the motor shaft away from the pump, and the magnetic ring shaft is coaxially arranged with the motor shaft, the magnetic ring shaft having a first hole opened along its axial direction and a second hole opened along its radial direction;

[0016] The medium flow channel includes at least a second flow channel, one end of which is connected to the first hole. The medium flow channel also includes a second groove, which is provided on the pump housing or the outer wall of the motor shaft. The second groove is connected to the other end of the second flow channel and is connected to the low-pressure area or high-pressure area inside the pump housing.

[0017] Alternatively, the medium flow channel may include at least a second flow channel, one end of which is connected to the first hole. The medium flow channel may also include a third hole, which is located at the end of the motor shaft near the pump. The second flow channel is connected to a low-pressure area or a high-pressure area within the pump housing through the third hole.

[0018] In some embodiments, the medium flow channel includes at least a third flow channel, one end of which is located at the end of the motor housing away from the pump, and the other end of which extends to the end of the motor housing near the pump. The medium flow channel also includes a fourth flow channel, which is formed on the pump housing. One end of the fourth flow channel is connected to a high-pressure area or a low-pressure area within the pump housing, and the other end of the fourth flow channel is connected to the third flow channel.

[0019] In some embodiments, the third flow channel includes a radial section and a circumferential section connected to each other, the radial section being located on the end plate of the motor housing away from the pump, and the circumferential section being located on the circumferential sidewall of the motor housing.

[0020] In some embodiments, the circumferential sections are arranged in a straight line, a serpentine pattern, or a spiral pattern;

[0021] And / or, the motor housing is provided with a first process hole, the first process hole is provided with a plug or oil seal, and the first process hole is located at the connection between the radial section and the circumferential section;

[0022] And / or, the pump housing is provided with a second process hole, the second process hole is provided with a plug or oil seal, and the second process hole is coaxially arranged and connected with a part section of the fourth flow channel;

[0023] And / or, the number of the radial segments and the circumferential segments is multiple.

[0024] In some embodiments, a one-way valve is also included, which is located within the medium flow channel and adjacent to the low-pressure zone within the pump housing.

[0025] In some embodiments, the device further includes a controller that abuts against the motor housing, wherein, when the medium flow channel has a third flow channel, at least a portion of the third flow channel is located within a sidewall of the motor housing on the side closest to the controller.

[0026] In some embodiments, the motor bearing is located at the end of the motor shaft furthest from the pump, and the motor bearing is disposed between the motor shaft and the motor housing; the pump bearing is located at the end of the motor shaft closest to the pump, and the pump bearing is disposed between the motor shaft and the pump housing.

[0027] In some embodiments, the medium flow channel includes a first flow channel and a second flow channel, wherein the end of the first flow channel away from the pump and the end of the second flow channel away from the pump are connected through a gap between the motor housing and the motor shaft;

[0028] Alternatively, the medium flow channel includes a first flow channel and a third flow channel, wherein the end of the first flow channel away from the pump and the end of the third flow channel away from the pump are connected through the gap between the motor housing and the motor shaft;

[0029] Alternatively, the medium flow channel includes a second flow channel and a third flow channel. A sealing component is provided on the side of the motor bearing near the rotor and on the side of the pump bearing adjacent to the rotor. The sealing component is used to prevent oil from flowing into the gap between the rotor and the stator. The end of the second flow channel away from the pump and the end of the third flow channel away from the pump are connected through the gap between the motor housing and the motor shaft.

[0030] The suspension system of this invention includes a shock absorber assembly and a motor pump, wherein the motor pump is the motor pump according to any of the above embodiments, and the shock absorber assembly is connected to the motor pump.

[0031] The vehicle equipment of this invention includes an electric motor pump, wherein the electric motor pump is the electric motor pump according to any of the above embodiments. Attached Figure Description

[0032] Figure 1 This is a three-dimensional schematic diagram of the motor pump according to an embodiment of the present invention.

[0033] Figure 2 This is a cross-sectional schematic diagram of the motor pump according to an embodiment of the present invention.

[0034] Figure 3 yes Figure 2 A schematic diagram of the AA direction.

[0035] Figure 4 yes Figure 2 A schematic diagram of the BB direction.

[0036] Figure 5 yes Figure 2 A schematic diagram of the CC direction.

[0037] Figure 6 This is a cross-sectional schematic diagram of another embodiment of the motor pump of the present invention.

[0038] Figure 7 yes Figure 6 A schematic diagram of the DD direction.

[0039] Figure 8 yes Figure 7 A schematic diagram of the EE direction.

[0040] Figure 9 This is a cross-sectional schematic diagram of another embodiment of the motor pump of the present invention.

[0041] Figure 10 yes Figure 9 A schematic diagram of the FF direction.

[0042] Figure 11 yes Figure 10 A schematic diagram of the GG direction.

[0043] Figure 12 yes Figure 11 A schematic diagram of the HH direction.

[0044] Figure 13 yes Figure 11 A schematic diagram of the middle II direction.

[0045] Figure 14 yes Figure 11 A schematic diagram of the JJ direction.

[0046] Figure label:

[0047] 100. Electric pump;

[0048] 1. Motor; 11. Motor housing; 111. Third flow channel; 1111. Radial section; 1112. Circumferential section; 1113. Plug or oil seal; 1114. First process hole; 12. Motor shaft; 121. Second flow channel; 122. Third hole; 13. Stator; 14. Rotor; 15. Magnetic ring shaft; 151. First hole; 152. Second hole; 16. First flow channel; 17. Bearing; 18. Sealing component; 19. Sealing ring;

[0049] 2. Pump; 21. Pump housing; 211. First groove; 212. Second groove; 213. Fourth flow channel; 22. Pump drive component; 23. Check valve; 24. Pump bearing; 25. Second process hole;

[0050] 3. Controller installation section. Detailed Implementation

[0051] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0052] The electric motor pump 100 of an embodiment of the present invention is described below.

[0053] See Figures 1 to 14 The electric pump 100 of this embodiment includes a motor 1, a pump 2 and a medium flow channel.

[0054] The motor 1 includes a motor housing 11, a motor shaft 12, a stator 13, a rotor 14, and a motor bearing 17 arranged in the inner cavity of the motor housing 11. The stator 13 is fixed to the inner wall of the motor housing 11, the motor shaft 12 is rotatably connected to the motor housing 11 through the motor bearing 17, the rotor 14 is fixed to the stator 13, the rotor 14 and the stator 13 are arranged opposite to each other, and there is a gap between the outer peripheral surface of the rotor 14 and the inner peripheral surface of the stator 13.

[0055] Pump 2 is connected to one axial end of motor 1. Pump 2 has a pump housing 21, a pump drive component 22, and a pump bearing 24. Pump housing 21 is fixedly connected to motor housing 11. Pump drive component 22 is located inside pump housing 21. The end of motor shaft 12 near pump 2 is connected to pump housing 21 via pump bearing 24. Pump drive component 22 is drively connected to motor shaft 12. Pump drive component 22 can be an impeller. During operation, motor 1 drives pump drive component 22 to move, thereby driving the flow of medium. The medium can be hydraulic oil.

[0056] Motor bearing 17 can be a rolling bearing, and pump bearing 24 can be a sliding bearing.

[0057] The medium flow channel is arranged inside the motor 1. One end of the medium flow channel is connected to the high-pressure area inside the pump housing 21, and the other end is connected to the low-pressure area inside the pump housing 21. The medium flow channel is connected to the bearing clearance of the motor bearing 17 and the pump bearing 24. When the motor 1 drives the pump 2 to operate, some of the medium can flow into the medium flow channel through the high-pressure area in the pump 2, and then flow to the bearing clearance of the motor bearing 17 and the pump bearing 24 for lubrication. The medium in the medium flow channel eventually flows to the low-pressure area in the pump 2. The medium in the medium flow channel is in a flowing state, so it can not only lubricate the motor bearing 17 and the pump bearing 24, but also carry away the heat at the motor bearing 17 and the pump bearing 24 in a timely manner, ensuring that the bearings are in a stable working state and improving the performance and service life of the bearings.

[0058] In this embodiment, the medium flow channel includes at least two of the following: a first flow channel 16 defined by the gap between the stator 13 and the rotor 14; a second flow channel 121 arranged in the motor shaft 12; and a third flow channel 111 arranged in the motor housing 11 of the motor 1. At least two of the three flow channels form the medium flow channel, thereby forming a circulating flow channel with the high-pressure area and the low-pressure area in the inner cavity of the pump 2. While the motor 1 drives the pump 2 to operate, the medium can flow in the medium flow channel.

[0059] In this embodiment, the medium flow channel includes at least a first flow channel 16 and a third flow channel 111. When the medium flows through the first flow channel 16 and / or the third flow channel 111, it can not only lubricate the bearing and carry away the heat at the bearing, but also exchange heat with the stator 13, rotor 14 and / or controller through direct or indirect contact, thereby achieving heat dissipation of the stator 13, rotor 14 and / or controller, which greatly improves the heat dissipation effect of the motor pump 100.

[0060] The motor pump 100 of this embodiment can use the medium flowing in the medium channel to lubricate and dissipate heat from the bearing, and can also carry away the heat generated by the stator 13, rotor 14 and / or controller, thereby improving the lubrication and heat dissipation performance of the motor pump 100.

[0061] See Figures 1 to 5 In some embodiments, the medium flow channel includes a first flow channel 16 and a second flow channel 121. The end of the first flow channel 16 away from the pump 2 and the end of the second flow channel 121 away from the pump 2 are connected through the gap between the motor housing 11 and the motor shaft 12.

[0062] The end of the first flow channel 16 near the pump 2 can be connected to the low-pressure area inside the pump housing 21, and the end of the second flow channel 121 near the pump 2 can be connected to the high-pressure area inside the pump housing 21. When the motor 1 drives the pump 2 to work, the medium first enters the second flow channel 121 in the middle of the motor shaft 12, then flows to the end of the motor shaft 12 away from the pump 2, and finally flows through the gap between the rotor 14 and the stator 13 before flowing back to the low-pressure area of ​​the pump housing 21. During this process, the medium will flow through the bearing gap between the motor bearing 17 and the pump bearing 24 to achieve bearing lubrication and heat dissipation.

[0063] The medium flows through the gap between the rotor 14 and the stator 13, thereby allowing the medium to come into direct contact with the stator 13 and the rotor 14 to achieve heat exchange.

[0064] See Figures 6-8 In some embodiments, the medium flow channel includes a second flow channel 121 and a third flow channel 111. A sealing member 18 is provided on the side of the motor bearing 17 near the rotor 14. A sealing member 18 is also provided on the side of the pump bearing 24 near the rotor. The sealing member 18 is used to prevent oil from flowing to the gap between the rotor 14 and the stator 13. The end of the second flow channel 121 away from the pump 2 and the end of the third flow channel 111 away from the pump 2 are connected through the gap between the motor housing 11 and the motor shaft 12.

[0065] The sealing component 18 can be an oil seal structure disposed between the motor shaft 12 and the motor housing 11, and between the motor shaft 12 and the pump housing 21.

[0066] The end of the second flow channel 121 near the pump 2 can communicate with the high-pressure area inside the pump housing 21, and the end of the third flow channel 111 near the pump 2 can communicate with the low-pressure area inside the pump housing 21. When the motor 1 drives the pump 2 to work, the medium first enters the second flow channel 121 in the motor shaft 12, then flows to the end of the motor 1 away from the pump 2, passes through the gap between the motor shaft 12 and the motor housing 11, and finally flows through the third flow channel 111 inside the motor housing 11 before flowing to the low-pressure area of ​​the pump housing 21.

[0067] The sealing component 18 prevents the medium from flowing into the gap between the rotor 14 and the stator 13. The bearing clearances of the motor bearing 17 and the pump bearing 24 are both connected to the medium flow channel, so the medium can lubricate the bearings and carry away the heat generated by the bearings.

[0068] The medium flows through the second flow channel 121 in the motor shaft 12, avoiding the gap between the rotor 14 and the stator 13. This ensures a relatively stable space between the rotor 14 and the stator 13, reducing the viscous force between them and improving the rotational performance of the rotor 14. As the medium flows through the second flow channel 121 in the motor shaft 12, it can carry away the heat from the motor shaft 12. When the medium flows through the third flow channel 111 in the motor housing 11, it can indirectly exchange heat with the stator 13 and the controller, thereby achieving lubrication and heat dissipation for the motor pump 100.

[0069] See Figures 9 to 14 In some embodiments, the medium flow channel includes a first flow channel 16 and a third flow channel 111, with the end of the first flow channel 16 away from the pump 2 and the end of the third flow channel 111 away from the pump 2 connected through a gap between the motor housing 11 and the motor shaft 12.

[0070] The end of the first flow channel 16 near the pump 2 can communicate with the high-pressure area inside the pump housing 21, and the end of the third flow channel 111 near the pump 2 can communicate with the low-pressure area inside the pump housing 21. When the motor 1 drives the pump 2 to work, the medium first enters the first flow channel 16 between the rotor 14 and the stator 13, then flows to the end of the motor 1 away from the pump 2, and finally flows through the third flow channel 111 inside the motor housing 11 to the low-pressure area of ​​the pump housing 21.

[0071] The medium flow channel is connected to the bearing clearances of the motor bearing 17 and the pump bearing 24. During this process, the medium flows through the motor bearing 17 and the pump bearing 24, lubricating and exchanging heat for the bearings. Simultaneously, the medium flows through the gap between the rotor 14 and the stator 13, allowing the medium to directly contact the stator 13 and the rotor 14 for heat exchange. Furthermore, when the medium flows through the third flow channel 111 in the motor housing 11, it can also indirectly exchange heat with the stator 13 and the controller, further improving the heat exchange efficiency throughout the process.

[0072] The motor pump 100 in some specific embodiments of the present invention is described below.

[0073] Example 1:

[0074] See Figures 1 to 5 The electric pump 100 of this embodiment includes a motor 1, a pump 2, a medium flow channel, and a controller. The pump 2 is connected to one end of the motor shaft 12 of the motor 1, and the controller abuts against the motor housing 11. The controller is used to control the operation of the motor 1.

[0075] The motor 1 includes a motor housing 11, a motor shaft 12, a stator 13, a rotor 14, a motor bearing 17, and a magnetic ring shaft 15 arranged within the inner cavity of the motor housing 11. The stator 13 is fixed to the inner wall of the motor housing 11, and the motor bearing 17 is located at the end of the motor shaft 12 away from the pump 2. There is a gap between the end of the motor shaft 12 away from the pump 2 and the motor housing 11. The motor bearing 17 is located between the motor shaft 12 and the motor housing 11, and the motor shaft 12 is rotatably connected to the motor housing 11 through the motor bearing 17. The motor shaft 12 has an axial through hole in its middle, and a third hole 122 at the end of the motor shaft 12 near the pump 2, extending in a generally radial direction along the motor shaft 12. The rotor 14 is fixed to the stator 13, and the rotor 14 and stator 13 are arranged opposite each other, with a gap between the outer circumferential surface of the rotor 14 and the inner circumferential surface of the stator 13.

[0076] The magnetic ring shaft 15 is connected to the end of the motor shaft 12 away from the pump 2, and the magnetic ring shaft 15 is arranged coaxially with the motor shaft 12. The magnetic ring shaft 15 has a first hole 151 opened along its axial direction and a second hole 152 opened along its radial direction.

[0077] Pump 2 has a pump housing 21, a pump drive component 22, and a pump bearing 24. The pump housing 21 is fixedly connected to the motor housing 11. The pump drive component 22 is located inside the pump housing 21 and is drively connected to the motor shaft 12. The pump drive component 22 can be an impeller. The end of the motor shaft 12 near the pump is connected to the pump housing 21 via the pump bearing 24. During operation, the motor 1 drives the pump drive component 22 to move, thereby driving the flow of the medium. The medium can be hydraulic oil.

[0078] The medium flow channel is arranged inside the motor 1. One end of the medium flow channel is connected to the high-pressure area inside the pump housing 21, and the other end of the medium flow channel is connected to the low-pressure area inside the pump housing 21. The medium flow channel is connected to the bearing clearance of the motor bearing 17 and the pump bearing 24. A one-way valve 23 is provided inside the medium flow channel and is set near the low-pressure area inside the pump housing 21 to ensure unidirectional flow of the medium within the medium flow channel.

[0079] When motor 1 drives pump 2, some of the medium can flow into the medium channel through the high-pressure zone of pump 2. The medium in the medium channel will eventually flow to the low-pressure zone of pump 2. The medium channel is connected to the bearing clearance of motor bearing 17 and pump bearing 24 to lubricate the bearings. The medium in the medium channel is in a flowing state, so it can not only lubricate the bearings, but also carry away the heat at the bearings in a timely manner, ensuring that the bearings are in a stable working state and improving the bearing performance and service life.

[0080] In this embodiment, the medium flow channel includes a first flow channel 16 defined by the gap between the stator 13 and the rotor 14, a second flow channel 121 (i.e., an axial through hole in the motor shaft 12) arranged in the motor shaft 12, and a first groove 211. The end of the first flow channel 16 away from the pump 2 and the end of the second flow channel 121 away from the pump 2 are connected through the gap between the motor housing 11 and the motor shaft 12.

[0081] The first groove 211 is formed on the outer wall of the motor shaft 12, and / or on the motor housing 11, and / or on the pump housing 21, and the first groove 211 communicates with the end of the first flow channel 16 near the pump 2. For example, the first groove 211 can be formed on the outer wall of the motor shaft 12. For another example, when the section between the inner cavity of the pump 2 and the inner cavity of the motor 1 is formed by the pump housing 21 and the motor shaft 12, the first groove 211 can be formed on the outer wall of the pump housing 21. For another example, when the section between the inner cavity of the pump 2 and the inner cavity of the motor 1 is formed by the pump housing 21 and the motor shaft 12, the groove on the outer wall of the motor shaft 12 and the groove on the pump housing 21 together define the first groove 211. For another example, when the section between the inner cavity of the pump 2 and the inner cavity of the motor 1 is formed by the motor housing 11 and the motor shaft 12, the first groove 211 can be formed on the motor housing 11.

[0082] Preferably, in this embodiment, the first groove 211 is formed on the pump housing 21. The first groove 211 is connected to the low-pressure area inside the pump housing 21. The one-way valve 23 is disposed in the first groove 211.

[0083] The end of the second flow channel 121 away from the pump 2 is connected to the first hole 151, and the end of the second flow channel 121 near the pump 2 is connected to the high-pressure area inside the pump housing 21 through the third hole 122 and / or the second groove 212.

[0084] When the motor 1 drives the pump 2 to work, the medium first enters the second flow channel 121 in the middle of the motor shaft 12 through the third hole 122 and / or the second groove 212, then flows to the end of the motor shaft 12 away from the pump 2, and finally flows back to the low-pressure area of ​​the pump housing 21 after passing through the first flow channel 16 and the first hole 151 between the rotor 14 and the stator 13.

[0085] At this time, the medium will flow through the gap between the rotor 14 and the stator 13, and the gap between the motor bearing 17 and the pump bearing 24, so that the medium comes into direct contact with the stator 13, the rotor 14 and the bearings to achieve heat exchange. Since the rotor core of the rotor 14 usually has hollow areas such as through holes, in this embodiment, the hollow areas inside the rotor 14 are filled by injection molding or potting to prevent the medium from flowing in, ensuring the working performance of the rotor 14, and allowing the medium to flow only through the gap between the rotor 14 and the stator 13.

[0086] In this embodiment, the medium flows through the motor bearing 17 and the pump bearing 24, lubricating and exchanging heat for the bearings. Simultaneously, the medium flows through the gap between the rotor 14 and the stator 13, allowing the medium to directly contact the stator 13 and rotor 14 for heat exchange. This embodiment not only lubricates the bearings and removes heat from them, but also achieves heat dissipation for the stator 13 and rotor 14 through direct contact heat exchange, significantly improving the heat dissipation effect of the motor pump 100.

[0087] Example 2:

[0088] See Figures 6-8 The electric pump 100 of this embodiment includes a motor 1, a pump 2, a medium flow channel, and a controller. The pump 2 is connected to one end of the motor shaft 12 of the motor 1. A controller mounting part 3 is provided on one side of the motor housing 11. The controller is connected to the controller mounting part 3 and abuts against the motor housing 11. The controller is used to control the operation of the motor 1.

[0089] The motor 1 includes a motor housing 11, a motor shaft 12, a stator 13, a rotor 14, a motor bearing 17, and a magnetic ring shaft 15 arranged within the inner cavity of the motor housing 11. The stator 13 is fixed to the inner wall of the motor housing 11, and the motor bearing 17 is located at the end of the motor shaft 12 away from the pump 2. There is a gap between the end of the motor shaft 12 away from the pump 2 and the motor housing 11. The motor bearing 17 is located between the motor shaft 12 and the motor housing 11, and the motor shaft 12 is rotatably connected to the motor housing 11 through the motor bearing 17. The motor shaft 12 has an axial through hole in its middle. The rotor 14 is fixed to the stator 13, and the rotor 14 and the stator 13 are arranged opposite to each other, with a gap between the outer circumferential surface of the rotor 14 and the inner circumferential surface of the stator 13.

[0090] The magnetic ring shaft 15 is connected to the end of the motor shaft 12 away from the pump 2, and the magnetic ring shaft 15 is arranged coaxially with the motor shaft 12. The magnetic ring shaft 15 has a first hole 151 opened along its axial direction and a second hole 152 opened along its radial direction.

[0091] Pump 2 has a pump housing 21, a pump drive component 22, and a pump bearing 24. The pump housing 21 is fixedly connected to the motor housing 11. The pump drive component 22 is located inside the pump housing 21 and is drively connected to the motor shaft 12. The pump drive component 22 can be an impeller. The end of the motor shaft 12 near the pump is connected to the pump housing 21 via the pump bearing 24. During operation, the motor 1 drives the pump drive component 22 to move, thereby driving the flow of the medium. The medium can be hydraulic oil.

[0092] The medium flow channel is arranged inside the motor 1. One end of the medium flow channel is connected to the high-pressure area inside the pump housing 21, and the other end is connected to the low-pressure area inside the pump housing 21. The medium flow channel is connected to the bearing clearance of the motor bearing 17 and the pump bearing. A one-way valve 23 is provided inside the medium flow channel and is set near the low-pressure area inside the pump housing 21 to ensure unidirectional flow of the medium within the medium flow channel.

[0093] When motor 1 drives pump 2, some of the medium can flow into the medium channel through the high-pressure zone of pump 2. The medium in the medium channel will eventually flow to the low-pressure zone of pump 2. The medium channel is connected to the bearing clearance of motor bearing 17 and pump bearing 24. The medium in the medium channel is in a flowing state, so it can not only lubricate the bearings, but also carry away the heat at the bearings in a timely manner, ensuring that the bearings are in a stable working state and improving the performance and service life of the bearings.

[0094] In this embodiment, the medium flow channel includes a second flow channel 121 (i.e., an axial through hole in the motor shaft 12) arranged in the motor shaft 12, and a third flow channel 111, a second groove 212, and a fourth flow channel 213 arranged in the motor housing 11. The end of the second flow channel 121 furthest from the pump 2 is connected to the end of the third flow channel 111 furthest from the pump 2 through a gap between the motor housing 11 and the motor shaft 12. The fourth flow channel 213 is formed on the pump housing 21, with one end connected to the low-pressure area within the pump housing 21, and the other end connected to the third flow channel 111. A one-way valve 23 is disposed within the fourth flow channel 213. A sealing ring 19 is circumferentially provided at the end of the fourth flow channel 213 near the third flow channel 111, ensuring the sealing performance at the connection between the third flow channel 111 and the fourth flow channel 213 when the motor housing 11 and the pump housing 21 abut.

[0095] At least a portion of the third flow channel 111 is located within the sidewall of the motor housing 11 on the side closest to the controller. The third flow channel 111 includes a connected radial section 1111 and a circumferential section 1112. The radial section 1111 is located on the end plate of the motor housing 11 away from the pump 2, and the circumferential section 1112 is located on the circumferential sidewall of the motor housing 11. The circumferential section 1112 can be arranged in a straight line, a serpentine arrangement, or a spiral arrangement. A first process hole 1114 is provided on the motor housing 11, corresponding to the radial section 1111. A plug or oil seal 1113 is provided on the first process hole 1114, which is located at the connection between the radial section 1111 and the circumferential section 1112. During processing, the setting of the first process hole facilitates the processing of the radial section 1111 and the circumferential section 1112. After processing is completed, the first process hole 1114 is sealed by a plug or oil seal 1113 to ensure the connection between the radial section 1111 and the circumferential section 1112.

[0096] Accordingly, a second process hole 25 is provided on the pump housing 21, and a plug or oil seal 1113 is provided on the second process hole 25. The second process hole 25 is coaxially arranged and connected with a part of the fourth flow channel 213. This facilitates the machining of the fourth flow channel 213. After machining, the second process hole 25 is sealed by the plug or oil seal 1113.

[0097] In this embodiment, there are multiple radial segments 1111 and circumferential segments 1112. Preferably, there are two radial segments 1111 and two circumferential segments 1112.

[0098] The second groove 212 is provided on the pump housing 21 or on the outer wall of the motor shaft 12. For example, the second groove 212 is only provided on the outer wall of the motor shaft 12. For another example, the second groove 212 is only provided on the outer wall of the pump housing 21. For yet another example, the groove on the outer wall of the motor shaft 12 and the groove on the pump housing 21 together define the second groove 212.

[0099] Preferably, in this embodiment, the second groove 212 is formed on the pump housing 21, and the second groove 212 is connected to the high-pressure area inside the pump housing 21.

[0100] The end of the second flow channel 121 away from the pump 2 is connected to the first hole 151, and the end of the second flow channel 121 near the pump 2 is connected to the high-pressure area inside the pump housing 21 through the second groove 212.

[0101] Of course, a third hole 122 can be provided at the end of the motor shaft 12 near the pump 2, so that the second flow channel 121 in the middle of the motor shaft 12 can be connected to the high pressure area in the pump housing 21 through the third hole 122 and / or the second groove 212.

[0102] A sealing component 18 is provided on the side of the motor bearing 17 near the rotor 14. A sealing component 18 is also provided on the side of the pump bearing 21 near the rotor. The second hole 152 is located on the side of the sealing component 18 corresponding to the motor bearing 17 away from the pump 2. The sealing component 18 is used to prevent oil from flowing to the gap between the rotor 14 and the stator 13.

[0103] When the motor 1 drives the pump 2 to work, the medium first enters the second flow channel 121 in the middle of the motor shaft 12 through the second groove 212, then flows to the end of the motor shaft 12 away from the pump 2, and flows through the first hole 151 and the second hole 152. Finally, it flows through the third flow channel 111 and the fourth flow channel 213 in the motor housing 11 and then flows back to the low-pressure area of ​​the pump housing 21.

[0104] The medium will not flow through the gap between the rotor 14 and the stator 13, ensuring a relatively stable space between the rotor 14 and the stator 13, reducing the viscous force between them, and improving the rotational performance of the rotor 14. When the medium flows through the second flow channel 121 in the motor shaft 12, it can carry away the heat from the motor shaft 12. When the medium flows through the third flow channel 111 in the motor housing 11, it can indirectly exchange heat with the stator 13 and the controller.

[0105] During this process, the medium flows through the motor bearing 17 and the pump bearing 24, lubricating and exchanging heat for the bearings. Simultaneously, the medium flows through the third flow channel 111 in the motor housing 11, thereby indirectly contacting the stator 13 and the controller to achieve heat exchange. This embodiment can lubricate the bearings and carry away heat from them. As the medium flows through the second flow channel 121 in the motor shaft 12, it can carry away heat from the motor shaft 12. Furthermore, the medium can dissipate heat from the stator 13 and the controller through indirect contact, significantly improving the heat dissipation effect of the motor pump 100.

[0106] Example 3:

[0107] See Figures 9-14 The electric pump 100 of this embodiment includes a motor 1, a pump 2, a medium flow channel, and a controller. The pump 2 is connected to one end of the motor shaft 12 of the motor 1. A controller mounting part 3 is provided on one side of the motor housing 11. The controller is connected to the controller mounting part 3 and abuts against the motor housing 11. The controller is used to control the operation of the motor 1.

[0108] The motor 1 includes a motor housing 11, a motor shaft 12, a stator 13, a rotor 14, and a motor bearing 17 arranged within the inner cavity of the motor housing 11. The stator 13 is fixed to the inner wall of the motor housing 11, and the motor bearing 17 is located at the end of the motor shaft 12 away from the pump 2. There is a gap between the end of the motor shaft 12 away from the pump 2 and the motor housing 11. The motor bearing 17 is located between the motor shaft 12 and the motor housing 11, and the motor shaft 12 is rotatably connected to the motor housing 11 through the motor bearing 17. The motor shaft 12 has an axial through hole in its middle section. The rotor 14 is fixed to the stator 13, and the rotor 14 and stator 13 are arranged opposite to each other, with a gap between the outer circumferential surface of the rotor 14 and the inner circumferential surface of the stator 13.

[0109] Pump 2 has a pump housing 21, a pump drive component 22, and a pump bearing 24. The pump housing 21 is fixedly connected to the motor housing 11. The pump drive component 22 is located inside the pump housing 21 and is drively connected to the motor shaft 12. The pump drive component 22 can be an impeller. The end of the motor shaft 12 near the pump is connected to the pump housing 21 via the pump bearing 24. During operation, the motor 1 drives the pump drive component 22 to move, thereby driving the flow of the medium. The medium can be hydraulic oil.

[0110] The medium flow channel is arranged inside the motor 1. One end of the medium flow channel is connected to the high-pressure area inside the pump housing 21, and the other end of the medium flow channel is connected to the low-pressure area inside the pump housing 21. The medium flow channel is connected to the bearing clearance of the motor bearing 17 and the pump bearing 24. A one-way valve 23 is provided inside the medium flow channel and is set near the low-pressure area inside the pump housing 21 to ensure unidirectional flow of the medium within the medium flow channel.

[0111] When motor 1 drives pump 2, some of the medium can flow into the medium flow channel through the high-pressure zone of pump 2. The medium in the medium flow channel will eventually flow to the low-pressure zone of pump 2. The medium flow channel is connected to the bearing clearance of motor bearing 17 and pump bearing 24. The medium in the medium flow channel is in a flowing state, so it can not only lubricate the bearings, but also carry away the heat at the bearings in a timely manner, ensuring that the bearings are in a stable working state and improving the bearing performance and service life.

[0112] In this embodiment, the medium flow channel includes a first flow channel 16 defined by the gap between the stator 13 and the rotor 14, and a third flow channel 111, a first groove 211, and a fourth flow channel 213 arranged within the motor housing 11. The end of the first flow channel 16 away from the pump 2 is connected to the end of the third flow channel 111 away from the pump 2 through the gap between the motor housing 11 and the motor shaft 12. The fourth flow channel 213 is formed on the pump housing 21, with one end connected to the low-pressure area within the pump housing 21 and the other end connected to the third flow channel 111. A one-way valve 23 is disposed within the fourth flow channel 213. A sealing ring 19 is circumferentially provided at the end of the fourth flow channel 213 near the third flow channel 111 to ensure the sealing performance at the connection between the third flow channel 111 and the fourth flow channel 213 when the motor housing 11 and the pump housing 21 abut.

[0113] At least a portion of the third flow channel 111 is located within the sidewall of the motor housing 11 on the side closest to the controller. The third flow channel 111 includes a connected radial section 1111 and a circumferential section 1112. The radial section 1111 is located on the end plate of the motor housing 11 away from the pump 2, and the circumferential section 1112 is located on the circumferential sidewall of the motor housing 11. The circumferential section 1112 can be arranged in a straight line, a serpentine arrangement, or a spiral arrangement. A first process hole 1114 is provided on the motor housing 11, corresponding to the radial section 1111. A plug or oil seal 1113 is provided on the first process hole 1114, which is located at the connection between the radial section 1111 and the circumferential section 1112. During processing, the first process hole 1114 facilitates the processing of the radial section 1111 and the circumferential section 1112. After processing, the first process hole is sealed by a plug or oil seal 1113 to ensure the connection between the radial section 1111 and the circumferential section 1112.

[0114] Accordingly, a second process hole 25 is provided on the pump housing 21, and a plug or oil seal 1113 is provided on the second process hole 25. The second process hole 25 is coaxially arranged and connected with a part of the fourth flow channel 213. This facilitates the machining of the fourth flow channel 213. After machining, the second process hole 25 is sealed by the plug or oil seal 1113.

[0115] In this embodiment, there are multiple radial segments 1111 and circumferential segments 1112. Preferably, there are two radial segments 1111 and two circumferential segments 1112.

[0116] The first groove 211 communicates with the end of the first flow channel 16 near the pump 2. The first groove 211 is formed on the outer wall of the motor shaft 12, and / or on the motor housing 11, and / or on the pump housing 21. For example, the first groove 211 can be formed on the outer wall of the motor shaft 12. For another example, when the section between the inner cavity of the pump 2 and the inner cavity of the motor 1 is formed by the pump housing 21 and the motor shaft 12, the first groove 211 can be formed on the outer wall of the pump housing 21. For another example, when the section between the inner cavity of the pump 2 and the inner cavity of the motor 1 is formed by the pump housing 21 and the motor shaft 12, the groove on the outer wall of the motor shaft 12 and the groove on the pump housing 21 together define the first groove 211. For another example, when the section between the inner cavity of the pump 2 and the inner cavity of the motor 1 is formed by the motor housing 11 and the motor shaft 12, the first groove 211 can be formed on the motor housing 11.

[0117] Preferably, in this embodiment, the first groove 211 is formed on the pump housing 21. The first groove 211 is connected to the low-pressure area inside the pump housing 21. The one-way valve 23 is disposed in the first groove 211.

[0118] When the motor 1 drives the pump 2 to work, the medium first enters the first flow channel 16 between the rotor 14 and the stator 13 through the first groove 211, and finally flows back to the low-pressure area of ​​the pump housing 21 after passing through the third flow channel 111 and the fourth flow channel 213 in the motor housing 11.

[0119] The medium flows through the gap between the rotor 14 and the stator 13, allowing the medium to directly contact the stator 13 and the rotor 14 for heat exchange. Since the rotor 14 core usually has hollow areas such as through holes, in this embodiment, the hollow areas inside the rotor 14 are filled by injection molding or potting to prevent the medium from flowing in, ensuring the working performance of the rotor 14, and allowing the medium to flow only through the gap between the rotor 14 and the stator 13.

[0120] During this process, the medium flows through the motor bearing 17 and the pump bearing 24, lubricating and exchanging heat for the bearings. Simultaneously, the medium flows through the gap between the rotor 14 and the stator 13, allowing direct contact between the medium and the stator 13 and rotor 14 for heat exchange. When the medium flows through the third flow channel 111 in the motor housing 11, it can indirectly contact the stator 13 and the controller, thereby achieving heat dissipation for the stator 13 and the controller.

[0121] This embodiment can not only lubricate the bearing and remove the heat from the bearing, but also achieve heat dissipation of the stator 13, rotor 14 and controller through direct contact heat exchange and indirect contact heat exchange, which greatly improves the heat dissipation effect of the motor pump 100.

[0122] Example 4:

[0123] See Figures 9 to 14 The motor pump 100 of this embodiment includes a motor 1, a pump 2, a medium flow channel, and a controller. The pump 2 is connected to one end of the motor shaft 12 of the motor 1, and the controller abuts against the motor housing 11. The controller is used to control the operation of the motor 1. The structure of this embodiment is basically the same as that of Embodiment 3, except that the medium flow channel of this embodiment simultaneously includes a first flow channel 16, a second flow channel 121, and a third flow channel 111.

[0124] When the motor 1 drives the pump 2 to work, the medium enters the first flow channel 16 between the rotor 14 and the stator 13 through the first groove 211. At the same time, the medium also flows into the second flow channel 121 in the middle of the motor shaft 12 through the second groove 212 or the fourth flow channel 213, and then flows to the end of the motor 1 away from the pump 2. Finally, it flows back to the low-pressure area of ​​the pump housing 21 after passing through the third flow channel 111 and the fourth flow channel 213 in the motor housing 11.

[0125] At this time, the medium flows through the gap between the rotor 14 and the stator 13, the middle of the motor shaft 12, and the bearing gap between the motor bearing 17 and the pump bearing 24, so that the medium directly contacts the stator 13, the rotor 14, the motor shaft 12, and the bearings to achieve heat exchange and lubricate the bearings. Since the rotor 14 core usually has hollow areas such as through holes, in this embodiment, the hollow areas inside the rotor 14 are filled by injection molding or potting to prevent the medium from flowing in and to ensure the working performance of the rotor 14.

[0126] When the medium flows through the third flow channel 111 in the motor housing 11, it can indirectly contact the stator 13 and the controller, thereby achieving heat dissipation for the stator 13 and the controller.

[0127] The suspension system of this invention includes a shock absorber assembly and a motor pump, wherein the motor pump is the same as that according to any of the above embodiments, and the shock absorber assembly is connected to the motor pump. The suspension system of this embodiment achieves the same effect as the motor pump of the above embodiments, and therefore will not be described again.

[0128] The vehicle equipment of this invention includes an electric motor pump, which is the electric motor pump according to any of the above embodiments. The effects achieved by the vehicle equipment of this embodiment are the same as those achieved by the electric motor pumps of the above embodiments, and therefore will not be described again.

[0129] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0130] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0131] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0132] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0133] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0134] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. An electric motor pump, characterized in that, include: An electric motor, the electric motor comprising a motor housing, a motor shaft arranged in the inner cavity of the motor housing, a stator, a rotor, and motor bearings; A pump connected to one axial end of the motor, the pump having a pump housing, a pump drive component and a pump bearing; A medium flow channel is arranged inside the motor. One end of the medium flow channel is connected to the high-pressure area inside the pump housing, and the other end of the medium flow channel is connected to the low-pressure area inside the pump housing. The medium flow channel is connected to the bearing clearance of the motor bearing and the pump bearing. The medium flow channel includes at least two of a first flow channel defined by the gap between the stator and the rotor, a second flow channel arranged in the motor shaft, and a third flow channel arranged in the motor housing of the motor.

2. The electric pump according to claim 1, characterized in that, The medium flow channel includes at least the first flow channel. The hollow area inside the rotor is injection molded or potted to prevent the medium from flowing in. The medium flow channel also includes a first groove. The first groove is formed on the outer wall of the motor shaft, and / or on the motor housing, and / or on the pump housing. The first groove is connected to the end of the first flow channel near the pump. The first groove is connected to the low-pressure area or high-pressure area inside the pump housing.

3. The electric pump according to claim 1, characterized in that, The motor also includes a magnetic ring shaft connected to the end of the motor shaft away from the pump, and the magnetic ring shaft is coaxially arranged with the motor shaft. The magnetic ring shaft has a first hole opened along its axial direction and a second hole opened along its radial direction. The medium flow channel includes at least a second flow channel, one end of which is connected to the first hole. The medium flow channel also includes a second groove, which is provided on the pump housing or the outer wall of the motor shaft. The second groove is connected to the other end of the second flow channel and is connected to the low-pressure area or high-pressure area inside the pump housing. Alternatively, the medium flow channel may include at least a second flow channel, one end of which is connected to the first hole. The medium flow channel may also include a third hole, which is located at the end of the motor shaft near the pump. The second flow channel is connected to a low-pressure area or a high-pressure area within the pump housing through the third hole.

4. The electric pump according to claim 1, characterized in that, The medium flow channel includes at least a third flow channel, one end of which is located at the end of the motor housing away from the pump, and the other end of which extends to the end of the motor housing near the pump. The medium flow channel also includes a fourth flow channel, which is formed on the pump housing. One end of the fourth flow channel is connected to a high-pressure area or a low-pressure area inside the pump housing, and the other end of the fourth flow channel is connected to the third flow channel.

5. The electric pump according to claim 4, characterized in that, The third flow channel includes a connected radial section and a circumferential section. The radial section is located on the end plate of the motor housing away from the pump, and the circumferential section is located on the circumferential sidewall of the motor housing.

6. The electric pump according to claim 5, characterized in that, The circumferential sections are arranged in a straight line, a serpentine pattern, or a spiral pattern; And / or, the motor housing is provided with a first process hole, the first process hole is provided with a plug or oil seal, and the first process hole is located at the connection between the radial section and the circumferential section; And / or, the pump housing is provided with a second process hole, the second process hole is provided with a plug or oil seal, and the second process hole is coaxially arranged and connected with a part section of the fourth flow channel; And / or, the number of the radial segments and the circumferential segments is multiple.

7. The electric pump according to claim 1, characterized in that, It also includes a one-way valve, which is located in the medium flow channel and adjacent to the low-pressure area in the pump housing.

8. The electric pump according to claim 1, characterized in that, It also includes a controller that abuts against the motor housing, and when the medium flow channel has a third flow channel, at least a portion of the third flow channel is located within the side wall of the motor housing on the side closest to the controller.

9. The electric pump according to claim 1, characterized in that, The motor bearing is located at the end of the motor shaft furthest from the pump, and is disposed between the motor shaft and the motor housing. The pump bearing is located at the end of the motor shaft closest to the pump, and is disposed between the motor shaft and the pump housing.

10. The electric pump according to claim 9, characterized in that, The medium flow channel includes a first flow channel and a second flow channel. The end of the first flow channel away from the pump and the end of the second flow channel away from the pump are connected through the gap between the motor housing and the motor shaft. Alternatively, the medium flow channel includes a first flow channel and a third flow channel, wherein the end of the first flow channel away from the pump and the end of the third flow channel away from the pump are connected through the gap between the motor housing and the motor shaft; Alternatively, the medium flow channel includes a second flow channel and a third flow channel. A sealing component is provided on the side of the motor bearing near the rotor and on the side of the pump bearing adjacent to the rotor. The sealing component is used to prevent oil from flowing into the gap between the rotor and the stator. The end of the second flow channel away from the pump and the end of the third flow channel away from the pump are connected through the gap between the motor housing and the motor shaft.

11. A suspension system, characterized in that, It includes a shock-absorbing assembly and a motor pump, wherein the motor pump is the motor pump as described in any one of claims 1 to 10, and the shock-absorbing assembly is connected to the motor pump.

12. A vehicle device, characterized in that, Includes an electric motor pump, wherein the electric motor pump is the electric motor pump as described in any one of claims 1 to 10.

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