High-performance integrated electric pump set applied to vehicle chassis active suspension, active suspension system and vehicle

Abstract

The invention provides a high-performance integrated type electric pump set applied to a vehicle chassis active suspension, an active suspension system and a vehicle, and the high-performance integrated type electric pump set suspension system comprises a first pump shell, a motor shell and a second pump shell which are sequentially arranged in the axial direction; the hydraulic pump further comprises a controller shell detachably connected to the motor shell, a first hydraulic pump is arranged in the first pump shell, a motor is arranged in the motor shell, a second hydraulic pump is arranged in the second pump shell, and a controller is arranged in the controller shell. The motor is provided with a left output shaft and a right output shaft which are connected with the first hydraulic pump and the second hydraulic pump respectively, and the controller is electrically connected with the motor. The electric pump set is higher in integration degree, smaller in installation occupied space, lighter in weight and lower in cost, the vehicle lightweight design and the whole vehicle simplified arrangement are better met, the performance of a suspension system adopting the electric pump set can be stable, and the vehicle driving stability can be guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of active suspension systems, and in particular to a high-performance integrated electric pump group applied to active suspension of a vehicle chassis, an active suspension system and a vehicle. Background Art

[0002] Traditional shock absorbers have poor shock filtering performance and average ride comfort; compared with traditional shock absorbers, semi-active suspension has continuously adjustable damping, but there is still a big gap in adjustment accuracy and response speed compared with active suspension. As market customers have higher and higher requirements for the smoothness and handling of cars, the market share of electronically controlled shock absorbers is gradually increasing, and active suspension, as a better technical solution, is gradually becoming the mainstream of the market.

[0003] Fully active suspensions usually use a motor pump assembly as their power supply. The motor pump assembly usually includes two motor-pump units, each of which includes a motor and an oil pump. The two motor pump units are usually axially arranged and connected, which requires a large installation space and has a high manufacturing cost. The current solution is to integrate the motor, hydraulic pump, and controller. Although it can reduce the occupied space to a certain extent, the space reduced by the integrated design is limited due to the need to ensure vehicle stability and installation stability, and it still cannot meet the increasing high requirements for vehicle lightweight design. Summary of the invention

[0004] In order to better solve the above problems, the present invention provides a high-performance integrated electric pump group, an active suspension system and a vehicle applied to the active suspension of the vehicle chassis. The electric pump group has a higher degree of integration, which can greatly reduce the installation space occupied by the electric pump group, and can control a motor through a controller to drive two hydraulic pumps to supply oil to the shock absorbers on both sides of the suspension, thereby ensuring the driving stability of the vehicle.

[0005] To achieve the above-mentioned purpose, an embodiment of the present invention provides a high-performance integrated electric pump group applied to the active suspension of the vehicle chassis, including a first pump housing, a motor housing, and a second pump housing arranged axially in sequence; and also including a controller housing detachably connected to the motor housing, a first hydraulic pump is arranged in the first pump housing, a motor is arranged in the motor housing, a second hydraulic pump is arranged in the second pump housing, and a controller is arranged in the controller housing; the motor shaft of the motor has two left and right output ends, which are respectively connected to the first hydraulic pump and the second hydraulic pump, and the controller is electrically connected to the motor.

[0006] Optionally, the controller housing is detachably connected to the upper side of the motor housing by bolts.

[0007] Optionally, a sealing groove is provided on the butt joint surface between the controller housing and the motor housing, and a sealing gasket or a sealing adhesive is provided in the sealing groove.

[0008] Optionally, the first pump casing and the second pump casing are detachably connected to both ends of the motor casing by axial bolts.

[0009] Optionally, sealing rings are provided between the first pump housing, the second pump housing and the motor housing.

[0010] Optionally, the motor includes a stator, a rotor and a motor shaft arranged from outside to inside, and the motor shaft includes a hollow shaft at the right end and a left extended shaft at the left end; a plurality of waist grooves are provided on the rotor and extend to both ends; the left end of the hollow shaft has a radial through hole connected to the central through hole, and the right end passes through the inner end cover of the second hydraulic pump and extends into the second hydraulic pump; the inner end cover of the second hydraulic pump is provided with two reflux holes respectively connected to the two chambers of the second hydraulic pump, and a first one-way valve is provided in the two reflux holes; the oil in the second hydraulic pump can pass through the central through hole, radial through hole and the second one-way valve of the hollow shaft; The oil flows into the left end of the motor through the through hole to lubricate the bearing, then flows back to the right end of the motor through the waist groove, and then flows back to the first hydraulic pump through the first one-way valve; the left end of the left extension shaft passes through the inner end cover of the first hydraulic pump and extends into the first liquid pump, an oil seal is arranged on the right side of the inner end cover of the first hydraulic pump, a reflux hole is arranged on the inner end cover of the first hydraulic pump, and a second one-way valve is arranged in the reflux hole; the oil in the first hydraulic pump flows out through the gap at the connection between the left extension shaft and the inner end cover of the first hydraulic pump, and can flow back to the first hydraulic pump through the second one-way valve.

[0011] Optionally, a rotor protection sleeve is provided between the stator and the rotor, and the rotor protection sleeve is tightly attached to the inner wall of the stator.

[0012] Optionally, there is a gap between the rotor protection cover and the stator, and the two ends are connected to the gaps at both ends of the rotor inside the motor; after the oil in the first hydraulic pump flows into the left end of the motor through the hollow shaft, part of the oil flows into the right end of the motor through the gap between the rotor protection cover and the stator.

[0013] According to another aspect of an embodiment of the present invention, an active suspension system is also provided, including an electric pump assembly and a shock absorber, the electric pump assembly including any one of the integrated electric pump groups described above, the inlet and outlet oil ports of the first hydraulic pump and the second hydraulic pump of the integrated electric pump group being respectively connected to the shock absorbers on the left and right sides of the active suspension system.

[0014] According to another aspect of an embodiment of the present invention, a vehicle is further provided. The vehicle includes the above-mentioned active suspension system.

[0015] The high-performance integrated electric pump group applied to the active suspension of the vehicle chassis of the embodiment of the present invention integrates a motor, two hydraulic pumps and a controller through a motor housing, two pump housings and a controller housing. The degree of integration is higher, the electric pump group occupies less space during installation, and the electric pump group is lighter, which is more in line with the requirements of lightweight design of the vehicle, helps to simplify the layout of the entire vehicle, and also reduces costs.

[0016] The high-performance integrated electric pump group in the embodiment of the present invention drives two hydraulic pumps respectively through the hollow shaft and the left extended shaft, and forms a hydraulic oil circulation circuit by arranging the hollow shaft, the waist groove, the gap between the rotor protection cover and the stator, and the one-way valve. When the motor is running, the oil can flow into the interior of the motor to lubricate the bearings, and the circulating oil can be used to take away the heat generated by the rotor for heat dissipation, which can ensure the stability of the motor operation, thereby improving the overall performance of the electric pump group.

[0017] The high-performance integrated electric pump group, active suspension system and vehicle of the embodiments of the present invention can control a motor through a controller to drive two hydraulic pumps to work respectively, supply oil to the left and right shock absorbers of the active suspension, and realize rapid and stable adjustment of the shock absorbers on both sides of the front and rear suspension of the vehicle. The performance is stable and reliable, and the driving stability of the vehicle can be guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0019] Figure 1 A schematic structural diagram of a high-performance integrated electric pump group applied to a vehicle chassis active suspension according to an embodiment of the present invention; Figure 2 Schematic diagram of the structure of a motor according to an embodiment of the present invention.

[0020] Reference numerals: 1. Motor housing; 2. Controller housing; 3. First pump housing; 4. Second pump housing; 5. Fixed bracket; 6. Controller mounting bolts; 7. Pump housing mounting bolts; 8. Bracket fixing bolts; 9. Bracket mounting bolts; 10. Stator; 11. Rotor; 12. Motor shaft; 121. Hollow shaft; 122. Left extended shaft; 13. Bearing; 14. Waist groove; 15. Rotor protection cover; 16. First one-way valve; 17. Oil seal; 18. Second one-way valve; 19. Sealing ring; 20. Sealing collar; 21. Sealing gasket. DETAILED DESCRIPTION

[0021] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited to the basic implementation disclosed below.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items. Example

[0023] like Figure 1 As shown, the high-performance integrated electric pump group applied to the active suspension of the vehicle chassis of the embodiment of the present invention includes a motor, two hydraulic pumps and a controller. The first hydraulic pump, the motor and the second hydraulic pump are arranged in sequence from left to right along the motor axis. The motor shaft of the motor has two left and right output ends, facing the outer ends respectively. The first hydraulic pump is connected to the left end of the motor shaft, and the second hydraulic pump is connected to the right end of the motor shaft. The controller is located above the motor and is electrically connected to the motor to control the motor to drive the two hydraulic pumps respectively. The integrated electric pump group also includes a housing assembly, which includes a motor housing 1, a controller housing, a first pump housing 3 and a second pump housing 4. The motor is installed in the motor housing 1, the controller is installed in the controller housing 2, the first hydraulic pump is installed in the first pump housing 3, and the second hydraulic pump is installed in the second pump housing 4. The motor housing 1 is located in the middle of the axial direction of the integrated electric pump group, and the two pump housings are symmetrically connected to the two ends of the motor housing. The controller housing 2 is located on the upper side of the motor housing 1.

[0024] In the integrated electric pump group of the embodiment of the present invention, each shell of the shell assembly is used to install the corresponding components and play a fixed supporting role. The lower docking surface of the controller housing 2 has a plurality of through holes around the periphery, and the upper docking surface of the motor housing 1 has a plurality of bolt holes corresponding to the positions around the periphery. The controller housing 2 and the motor housing can be stably and detachably connected by passing a plurality of controller mounting bolts 6 through the through holes and then screwing them into the bolt holes. Optionally, a sealing groove is provided on the docking surface of the controller housing 2 and the motor housing 1. The sealing groove can be changed according to the shape of the controller housing. A matching rubber sealing gasket (the height of the sealing gasket is greater than the depth of the sealing groove) or a sealant is provided in the sealing groove. The sealing gasket or the sealant can ensure the sealing of the connection between the controller housing 2 and the motor housing 1.

[0025] The first pump housing 3 and the second pump housing 4 are symmetrically connected to the left and right ends of the motor housing 1 by axial bolts, respectively. Specifically, a plurality of bolt holes are provided at the butt joint of the left end of the motor housing 1, and a plurality of through holes are provided at the butt joint of the right end of the first pump housing 3. By passing a plurality of pump housing mounting bolts 7 through the through holes and screwing into the bolt holes, the first pump housing 3 can be stably connected to the motor housing 1, and it is convenient to disassemble; the second pump housing 4 is detachably connected to the right end of the motor housing 1 in the same way. Optionally, a sealing ring is provided between the first pump housing 3, the second pump housing 4 and the motor housing 1 to ensure the sealing of the connection between the pump housing and the motor housing. The sealing ring can be O-shaped or special-shaped, which is specifically determined according to the shape of the pump housing. Of course, in actual applications, the first pump housing 3 and the second pump housing 4 can also be integrally formed at the left and right ends of the motor housing 1 at both ends of the motor housing. Although they cannot be disassembled, the connection process between the pump housing and the motor housing is omitted, which is more convenient for manufacturing and processing.

[0026] The outer end of the first pump housing 3 has an oil inlet and outlet connected to the first hydraulic pump, and the outer end of the second pump housing 4 has an oil inlet and outlet connected to the second hydraulic pump, so that when the electric pump unit is installed in the suspension system, the oil inlet and outlet are connected to the oil inlet and outlet of the hydraulic shock absorbers on the left and right sides of the suspension system to supply oil to the shock absorbers. The two hydraulic pumps can be controlled by the motor to supply oil, and the electromagnetic switch valve or proportional valve integrated in the shock absorber can be used to control the on-off and oil supply of the oil circuit.

[0027] The outer ends of the first pump housing 3 and the second pump housing 4 are provided with a fixing bracket 5. Specifically, a threaded hole is provided at the left end of the first pump housing 3, and a through hole is provided in the middle of the fixing bracket 5. The fixing bracket 5 can be installed on the left end of the first pump housing 3 by passing the bracket fixing bolt 8 through the through hole and then screwing it into the threaded hole; similarly, the fixing bracket 5 is also installed on the right end of the second pump housing 4. Furthermore, through holes are also provided at the upper and lower parts of the fixing bracket 5. The two ends of the electric pump group can be connected to the suspension system by passing the bracket mounting bolt 9 through the through hole and then fixing it with the suspension subframe crossbeam.

[0028] The integrated electric pump group of the embodiment of the present invention integrates a motor, two hydraulic pumps and a controller through a motor housing, two pump housings and a controller housing. Compared with the motor pump assembly using two motor-pump units in the prior art, it reduces one motor and one controller, has a higher degree of integration, can effectively reduce the installation space occupied by the motor pump assembly, and reduce the weight of the motor pump assembly, which is more in line with the requirements of lightweight vehicle design, helps to simplify the overall vehicle layout, and also reduces costs.

[0029] The integrated electric pump group in the embodiment of the present invention takes into account factors such as the cost, weight, and manufacturing difficulty of the motor pump assembly, breaks the traditional dual-motor dual-pump (two motor-pump units) motor pump assembly structure, designs a single-motor dual-pump structure, simplifies the structure of the motor pump assembly, reduces weight, reduces manufacturing difficulty, and reduces manufacturing cost; it also takes into account the different hydraulic oil flow rates and pressures required by different wheels, and can configure a pressure distribution valve to distribute the high-pressure oil of the hydraulic pump group of the motor pump assembly to meet the shock absorber adjustment requirements of the vehicle's active suspension system.

[0030] In the embodiment of the present invention, Figure 2 As shown, in the integrated electric pump unit, the motor includes a stator 10, a rotor 11, and a motor shaft 12 from the outside to the inside. The outer side of the stator 10 is fixedly connected to the inner side of the motor housing, the rotor 11 is axially arranged inside the stator 10, and the motor shaft 12 is passed through the rotor 11.

[0031] Among them, the motor shaft 12 is a hollow shaft 121, the right end of the hollow shaft 121 extends outward and passes through the inner end cover of the second hydraulic pump and extends into the second hydraulic pump. The left end of the hollow shaft 121 is also connected to the left extension shaft 122 through the shaft coupling section, and the left end of the left extension shaft 122 passes through the inner end cover of the first hydraulic pump and extends into the first hydraulic pump. Here, the outer end of the motor housing is an open end and is connected to the peripheral side of the inner end cover of the hydraulic pump. The two ends of the motor shaft can extend into the hydraulic pump by passing through the inner end cover of the hydraulic pump. The left end of the hollow shaft 121 extends to the left end of the motor, and passes through the motor housing (inner housing) at the left end of the motor and the bearing 13 at the left end of the motor through the shaft coupling section. The left end of the hollow shaft 121 has a radial through hole perpendicular to the axial direction at the position beyond the left end face of the rotor, and the radial through hole is connected to the central through hole of the hollow shaft 121. The oil in the second hydraulic pump can flow from the inner cavity oil drain port into the central through hole of the hollow shaft 121, and then flow into the left end of the motor through the radial through hole to lubricate the bearing 13. This can solve the problem of heat generated during long-term operation of the motor causing the lubricant applied during bearing installation to fail, thereby ensuring stable operation of the motor and improving the overall performance of the motor pump unit.

[0032] The rotor 11 is provided with a plurality of axial waist grooves 14, which penetrate to both ends of the rotor 11; the plurality of waist grooves 14 are evenly distributed on the circumference of the motor shaft at the center of the rotor 11, and the number of waist grooves 14 can be 4-8, which cannot be too many, and the size of the waist grooves 14 cannot be too large, which can reduce the weight of the rotor and avoid affecting the structural strength of the rotor 11. The inner end cover of the second hydraulic pump is provided with a reflux hole connected to the second hydraulic pump, and a first one-way valve 16 with an outward conduction direction is provided in the reflux hole; after the oil in the second hydraulic pump flows into the left end of the motor through the hollow shaft 121, it can flow back to the right end of the motor through the waist groove 14, and then flow back to the second hydraulic pump through the first one-way valve 16. Here, the number of reflux holes can be two, which are respectively connected to the two cavities of the second hydraulic pump through the first one-way valve 16. When the motor is running, the two cavities form high- and low-pressure cavities, so that the oil in the waist groove 14 can always flow into the low-pressure chamber side through the first one-way valve 16, forming a closed-loop oil return, thereby realizing the reflux function of the oil through the hollow shaft 121, the waist groove 14, and the first one-way valve 16.

[0033] Optionally, a rotor protective cover 15 is provided between the stator 10 and the rotor 11. The rotor protective cover 15 is provided close to the inner wall of the stator 10 and can be made of stainless steel. There is a gap between the inner side of the stainless steel rotor protective cover 15 and the outer side of the rotor 11. The two ends of the gap are respectively connected with the gaps at the two ends of the rotor inside the motor (the gap between the rotor end and the motor housing, and the gap between the rotor front end and the pump housing). Part of the oil flowing into the left end of the motor through the hollow shaft 121 can flow back to the right end of the motor through the gap at the left end of the motor and the gap between the stainless steel rotor protective cover 15 and the rotor 11, and then flow back to the hydraulic pump through the one-way valve 16 together with the oil flowing back to the right end of the motor through the waist groove 14. On the one hand, since most of the heat generated during the operation of the motor comes from the stator, the rotor protective cover can be provided to transfer the heat to the stainless steel cover and then to the oil, so that the circulating oil can take away the heat to achieve the purpose of heat dissipation; on the other hand, it can also prevent the high-speed permanent magnet on the rotor from falling off during the operation of the motor, and protect the rotor and stator.

[0034] The length of the rotor protection sleeve 15 is greater than the length of the rotor 11 and the hollow shaft 121. The left end of the rotor protection sleeve 15 abuts the motor housing. A sealing ring 19 is provided at the left end connection, which is located between the left end of the rotor protection sleeve and the end of the motor housing and is used to seal the left end of the motor housing; the right end of the rotor protection sleeve 15 abuts the inner end cover of the second hydraulic pump. A sealing ring 19 and a sealing collar 20 are provided at the right end connection. The sealing ring 19 is provided between the inner side of the right end of the rotor protection sleeve and the inner end cover, and the sealing collar 20 is hooped on the outer side of the right end of the rotor protection sleeve (a sealing gasket 21 is also provided between the sealing collar 20 and the outer end of the inner end cover). The sealing ring 19, the sealing collar 20 and the sealing gasket 21 provided inside and outside can effectively seal the right end of the motor.

[0035] The left extension shaft 122 at the left end of the motor shaft 12 is inserted into the sliding bearing at the center of the inner end cover of the first hydraulic pump. An oil seal 17 is arranged on the right side of the inner end cover. Since there is a gap at the connection between the sliding bearing and the left extension shaft 122, the oil in the first hydraulic pump can flow into the right side of the inner end cover through the gap. By arranging the oil seal 17, it is possible to avoid leakage of the oil in the first hydraulic pump, thereby ensuring the sealing performance of the first hydraulic pump. At the same time, there is a cavity between the inner end cover of the first hydraulic pump and the oil seal 17. The inner end cover is provided with a reflux hole connected to the first hydraulic pump at the cavity corresponding to the cavity. The reflux hole is provided with a second one-way valve 18 with a guiding direction toward the first hydraulic pump, so that the oil flowing into the cavity can flow back to the first hydraulic pump through the second one-way valve 18, thereby avoiding the accumulation of oil in the cavity.

[0036] In this embodiment, Figure 2 Also shown are sealing rings 19 disposed at the connection between the two ends of the motor and the motor housing, as well as sealing rings 19, sealing collars 20, and sealing gaskets 21 disposed at the connection between the right end of the motor and the hydraulic pump end cover. However, in actual applications, the sealing members disposed at the motor ends and at the connection between the motor ends and the hydraulic pump end cover are not limited thereto. In other embodiments, other types of sealing members may be disposed according to the actual structure of the motor housing and the inner end cover, or sealing members may be disposed at other positions, as long as the sealing effect can be ensured. Example

[0037] This embodiment provides an automobile active suspension system, including a hydraulic shock absorption system composed of an electric pump assembly and a shock absorber, wherein the electric pump assembly includes the electric pump group of the above-mentioned embodiment 1, and the shock absorber includes the shock absorber assembly on the left and right sides, and the oil inlet and outlet of the two hydraulic pumps of the electric pump group are respectively connected to the oil inlet and outlet of the shock absorbers on both sides, which are used to realize the oil storage and oil replenishment of the lower chamber of the shock absorber during the extension and compression of the shock absorber. Among them, the shock absorber assembly mainly consists of a shock absorber, a pressure distribution valve, a high and low pressure sensor, etc. The shock absorber assembly identifies different forms of the vehicle through a pressure sensor and sends instructions to the solenoid valve, which can realize different loads of the hydraulic pumps on both sides at the same motor speed.

[0038] The active suspension system can control the two output shafts of the motor to rotate forward and reverse through the controller, and drive two hydraulic pumps to operate at the same time. The two hydraulic pumps can operate well within the range of 0-20MPa, delivering high and low pressure oil to the shock absorbers on both sides, realizing the height change of the shock absorber piston rod, thereby changing the suspension height and suspension stiffness. When a vehicle equipped with this suspension system passes through a speed bump, when the first wheel hits the speed bump and is compressed, the shock absorber piston rod is lowered, the vehicle body height is lowered, and the impact is reduced; when the tire reaches the top and drops, the piston rod rises, and the vehicle body height is increased, so that the vehicle posture remains stable when passing through the speed bump, which greatly improves the ride comfort and brings a better riding experience.

[0039] Compared with the mainstream semi-active suspension in the current market, it can change both the damping force and the stiffness; compared with the air suspension, the air suspension has a long response time. Generally, it takes about 30 seconds to adjust the suspension height once, while the suspension system of this embodiment has an adjustment response speed of 100ms and can be adjusted in real time according to the road surface.

[0040] At the same time, when accelerating and braking, the current mainstream air suspension only has a slightly faster damping force response, and the suspension stiffness cannot be adjusted instantly. In the face of sudden acceleration and sudden braking, the nodding and lifting effects are not good, which can easily cause motion sickness in passengers. However, when the car is equipped with this suspension system, the piston rod is lowered to keep the body stable during sudden acceleration, and the piston rod is raised during sudden braking to suppress the body from nodding and keep the body stable. Generally, when passing through bumpy roads, vehicles always have poor front and rear convergence, and the body shakes severely, which can easily cause motion sickness in passengers. When the car is equipped with this suspension system, the piston rod is lowered as the road surface rises, achieving the maximum stability of the body. Example

[0041] This embodiment provides a vehicle, comprising the active suspension system of the above embodiment 2. The vehicle has the beneficial effects of the integrated electric pump group of the above embodiment 1 and the active suspension system of the above embodiment 2, which will not be described in detail here.

[0042] In actual application scenarios, the integrated electric pump group, suspension system, controller, motor, hydraulic pump, shock absorber, etc. in the vehicle of the embodiments of the present invention can adopt devices with corresponding functions in the prior art; and other structures can also be set in the integrated electric pump group to realize the actual application or other functions of the integrated electric pump group.

[0043] It should be noted that, according to implementation needs, the various components described in the embodiments of the present invention may be split into more components, or two or more components or parts of components may be combined into a new component to achieve the purpose of the embodiments of the present invention.

[0044] The above embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the attached claims.

Claims

1. A high-performance integrated electric pump unit for active suspension of vehicle chassis, characterized in that: It includes a first pump housing, a motor housing, and a second pump housing which are arranged axially in sequence; it also includes a controller housing which is detachably connected to the motor housing, a first hydraulic pump is arranged in the first pump housing, a motor is arranged in the motor housing, a second hydraulic pump is arranged in the second pump housing, and a controller is arranged in the controller housing; the motor shaft of the motor has two left and right output ends which are respectively connected to the first hydraulic pump and the second hydraulic pump, and the controller is electrically connected to the motor.

2. A high-performance integrated electric pump unit for vehicle chassis active suspension according to claim 1, characterized in that: The controller housing is detachably connected to the upper side of the motor housing by bolts.

3. A high-performance integrated electric pump unit for vehicle chassis active suspension according to claim 2, characterized in that: The butt joint surface between the controller housing and the motor housing is provided with a sealing groove, and a sealing gasket or sealing glue is provided in the sealing groove.

4. A high-performance integrated electric pump unit for vehicle chassis active suspension according to claim 1, characterized in that: The first pump housing and the second pump housing are detachably connected to the two ends of the motor housing through axial bolts.

5. A high-performance integrated electric pump unit for vehicle chassis active suspension according to claim 4, characterized in that: Sealing rings are arranged between the first pump housing, the second pump housing and the motor housing.

6. A high-performance integrated electric pump unit for vehicle chassis active suspension according to any one of claims 1 to 5, characterized in that: The motor comprises a stator, a rotor and a motor shaft arranged from outside to inside, wherein the motor shaft comprises a hollow shaft at the right end and a left extended shaft at the left end; a plurality of waist grooves penetrating to both ends are provided on the rotor; The left end of the hollow shaft has a radial through hole connected to the central through hole, and the right end passes through the inner end cover of the second hydraulic pump and extends into the second hydraulic pump. The inner end cover of the second hydraulic pump is provided with two reflux holes respectively connected to the two chambers of the second hydraulic pump, and the two reflux holes are provided with a first one-way valve; the oil in the second hydraulic pump can flow into the left end of the motor through the central through hole and the radial through hole of the hollow shaft to lubricate the bearing, and then flow back to the right end of the motor through the waist groove, and then flow back to the first hydraulic pump through the first one-way valve; The left end of the left extension shaft passes through the inner end cover of the first hydraulic pump and extends into the first hydraulic pump. An oil seal is arranged on the right side of the inner end cover of the first hydraulic pump. A reflux hole is arranged on the inner end cover of the first hydraulic pump, and a second one-way valve is arranged in the reflux hole. The oil in the first hydraulic pump flows out through the gap at the connection between the left extension shaft and the inner end cover of the first hydraulic pump, and can flow back to the first hydraulic pump through the second one-way valve.

7. A high-performance integrated electric pump unit for vehicle chassis active suspension according to claim 6, characterized in that: A rotor protection sleeve is arranged between the stator and the rotor, and the rotor protection sleeve is tightly attached to the inner side wall of the stator.

8. A high-performance integrated electric pump unit for vehicle chassis active suspension according to claim 7, characterized in that: There is a gap between the rotor protection cover and the stator, and the two ends are respectively connected with the gaps at the two ends of the rotor inside the motor; after the oil in the first hydraulic pump flows into the left end of the motor through the hollow shaft, part of the oil flows into the right end of the motor through the gap between the rotor protection cover and the stator.

9. An active suspension system, comprising an electric pump assembly and a shock absorber, characterized in that: The electric pump assembly comprises an integrated electric pump group as claimed in any one of claims 1 to 8, wherein the oil inlet and outlet ports of the first hydraulic pump and the second hydraulic pump of the integrated electric pump group are respectively connected to the shock absorbers on the left and right sides of the active suspension system.

10. A vehicle, characterized in that: The vehicle includes the active suspension system as claimed in claim 9.

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