Motor pump, driving assembly, active suspension system and vehicle

Abstract

The invention relates to a motor pump, a driving assembly, an active suspension system and a vehicle, the motor pump comprises a driving mechanism, a speed change mechanism and a pumping mechanism, and power output by the driving mechanism can be transmitted to the pumping mechanism after being adjusted by the speed change mechanism. Through the arrangement of the speed change mechanism, the output torque can be adjusted, so that a certain rotating speed difference exists between the rotating speed transmitted to the pumping mechanism and the output rotating speed of the driving mechanism, the dependence of the driving mechanism on high-torque output is effectively reduced, and the structural size and weight of the driving mechanism are reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of electric drive assembly, in particular to a motor pump, a drive assembly, an active suspension system and a vehicle. BACKGROUND

[0002] In modern automobile technology, in order to meet the needs of different functional systems for hydraulic drive, the vehicle is often equipped with a motor pump structure. The motor pump structure drives the pump body to operate by the motor, thereby generating hydraulic power to push the actuator to act, which is suitable for driving control of elements such as hydraulic cylinders. In order to realize effective driving of the actuator, the motor pump usually needs to have a large output torque. Therefore, the driving motor is often designed in the form of high power, large size and large weight, which is not conducive to the lightweight design of the vehicle as a whole to some extent, and may increase the requirements for arrangement space and energy consumption burden. SUMMARY

[0003] The motor pump, the drive assembly, the active suspension system and the vehicle provided by the embodiments of the present application reduce the output torque of the driving motor, so as to at least partially solve the above technical problems.

[0004] In order to achieve the above purpose, according to a first aspect of the present application, a motor pump is provided, comprising: a driving mechanism for outputting rotary power; a speed changing mechanism connected with the driving mechanism, for changing the rotary power output by the driving mechanism; and a pumping mechanism connected with the speed changing mechanism and / or the driving mechanism, for receiving the changed rotary power to drive fluid delivery.

[0005] In some embodiments, the driving mechanism is used to output rotary power in forward rotation or reverse rotation; The pumping mechanism comprises a first opening and a second opening, and the pumping mechanism is configured to: when the driving mechanism rotates forward, the first opening serves as a fluid inlet and the second opening serves as a fluid outlet; and when the driving mechanism reverses, the second opening serves as a fluid inlet and the first opening serves as a fluid outlet.

[0006] In some embodiments, the driving mechanism, the speed changing mechanism and the pumping mechanism are arranged in series in sequence in the axial direction; or, the driving mechanism and the pumping mechanism are arranged in parallel, and the speed changing mechanism is axially connected with the driving mechanism and the pumping mechanism respectively; or, the driving mechanism and the pumping mechanism are arranged in axial intersection, and the speed changing mechanism is drivingly connected with the driving mechanism and the pumping mechanism respectively.

[0007] In some embodiments, the driving mechanism comprises a first output shaft, the transmission mechanism comprises a first input shaft and a second output shaft, the pumping mechanism comprises a second input shaft, the first output shaft is in driving connection with the first input shaft, and the second output shaft is in driving connection with the second input shaft.

[0008] In some embodiments, the first output shaft, the first input shaft, the second output shaft and the second input shaft are coaxially arranged; or, the first output shaft and the first input shaft are coaxially arranged, the second output shaft and the second input shaft are coaxially arranged, and the first input shaft and the second output shaft are arranged in parallel; or, the first output shaft, the first input shaft and the second output shaft are coaxially arranged, and the second input shaft intersects with the second output shaft.

[0009] In some embodiments, the housings of the driving mechanism, the transmission mechanism and the pumping mechanism are fixedly connected and jointly enclose a lubricating cavity in communication with each other, and the lubricating cavity is used for accommodating lubricating fluid. In some embodiments, a sealing member is arranged at the connection between the driving mechanism, the transmission mechanism and the pumping mechanism.

[0010] In some embodiments, the driving mechanism comprises a first housing, the transmission mechanism comprises a second housing, and the pumping mechanism comprises a third housing, and the first housing, the second housing and the third housing are fixedly connected and jointly enclose the lubricating cavity. The sealing member is arranged between the first housing and the second housing and / or between the second housing and the third housing.

[0011] In some embodiments, the first housing, the second housing and the third housing are axially fixedly connected by a first fixing member.

[0012] In some embodiments, the lubricating cavity of the motor pump is in communication with the pump cavity of the pumping mechanism.

[0013] In some embodiments, the driving mechanism comprises a first shaft, and a part of the first shaft constitutes the input shaft of the transmission mechanism; the transmission mechanism comprises a second shaft, and a part of the second shaft constitutes the input shaft of the pumping mechanism.

[0014] In some embodiments, a first flow channel is arranged in the first shaft, one end of the first flow channel is used for communication with the pump cavity, and the other end is used for communication with the lubricating cavity. The first flow channel is configured to circulate fluid between the pump cavity and the lubricating cavity when the pumping mechanism is running.

[0015] In some embodiments, the second shaft is provided with a second flow channel, one end of the second flow channel is in communication with the lubricating cavity, and the other end is in communication with the pump cavity. The second flow channel is configured to drive fluid to circulate between the lubricating cavity and the pump cavity when the pumping mechanism is in operation.

[0016] In some embodiments, the first flow channel is in communication with the second flow channel, and the second flow channel is configured to drive fluid to enter the first flow channel via the second flow channel and circulate between the lubricating cavity and the pump cavity when the pumping mechanism is in operation.

[0017] In some embodiments, the first shaft and the second shaft are coaxially arranged, the first shaft is provided with a third opening, the third opening is in communication with the first flow channel, and the first opening of the pumping mechanism is located at one end of the first shaft close to the second shaft. The second shaft is provided with a fourth opening, the fourth opening is in communication with the second flow channel, the fourth opening is located at one end of the second shaft close to the first shaft, and the third opening and the fourth opening are oppositely arranged.

[0018] In some embodiments, one end of the first shaft away from the second shaft is provided with a fifth opening, and the first flow channel is in communication with the lubricating cavity through the fifth opening; and / or, One end of the second shaft away from the first shaft is provided with a sixth opening, and the second flow channel is in communication with the pump cavity through the sixth opening.

[0019] In some embodiments, the lubricating cavity and the pump cavity are in communication through a one-way conducting member; the one-way conducting member is configured to allow fluid to enter the pump cavity through the one-way conducting member when the fluid pressure in the lubricating cavity is greater than the pressure in the pump cavity.

[0020] In some embodiments, the pump cavity comprises a first region and a second region. When the first opening of the pumping mechanism serves as a fluid inlet, the first region is a high-pressure region, and the second region is a low-pressure region. When the second opening of the pumping mechanism serves as a fluid inlet, the first region is a low-pressure region, and the second region is a high-pressure region. The one-way conducting member is arranged to communicate with at least the low-pressure region in the first region and / or the second region.

[0021] In some embodiments, the first region and the second region are both provided with the one-way conducting member between the first region and the lubricating cavity and between the second region and the lubricating cavity.

[0022] In some embodiments, the first housing of the driving mechanism is provided with a cooling flow channel.

[0023] In some embodiments, the cooling flow channel is arranged along the circumference of the first housing; and / or, The cooling flow channel is provided with a plurality of baffles, which are arranged in the cooling flow channel in a staggered manner, so that the cooling flow channel has a path structure extending in a staggered manner along the circumference and the axial direction of the first housing.

[0024] In some embodiments, the cooling flow channel is arranged along the axial direction of the first housing, and the cooling flow channel is provided with a cover plate at both ends in the axial direction of the first housing for sealing the cooling flow channel.

[0025] In some embodiments, the pumping mechanism includes a gear pump; and / or, The variable speed mechanism includes a reduction structure; and / or, The variable speed mechanism includes a planetary reducer.

[0026] In some embodiments, the variable speed mechanism includes: A sun gear connected to the output shaft of the driving mechanism; A planet gear meshing with the sun gear; An inner tooth ring meshing with the planet gear; The planet gear is connected to a second shaft of the variable speed mechanism, and the second shaft is drivingly connected to the pumping mechanism.

[0027] In some embodiments, the pumping mechanism includes a gear pump, and a driving gear of the gear pump is drivingly connected to the second shaft.

[0028] In some embodiments, the driving gear of the pumping mechanism is sleeved on the second shaft and is limited in position in the circumferential direction of the second shaft.

[0029] In some embodiments, the sun gear is interference connected to the first shaft of the driving mechanism.

[0030] In some embodiments, the motor pump further includes a filter structure arranged in the lubricating cavity of the motor pump to filter metal particles in the lubricating cavity of the motor pump.

[0031] In some embodiments, the filter structure is arranged in at least one of the variable speed mechanism, the driving mechanism and the pumping mechanism.

[0032] In some embodiments, the filter structure includes a magnetic oil filter structure.

[0033] In some embodiments, the second housing of the variable speed mechanism is provided with a mounting hole, and the filter structure is mounted in the mounting hole.

[0034] In some embodiments, the first housing of the driving mechanism is provided with a second fixing member for connecting with external devices; and / or, The third housing of the pumping mechanism is provided with a third fixing member for connecting with external devices.

[0035] In some embodiments, the driving mechanism comprises a first housing, and the variable speed mechanism comprises a second housing, which is connected with the first housing and used for supporting the first shaft of the driving mechanism.

[0036] According to a second aspect of the present application, a driving assembly is provided, comprising the motor pump according to the above technical solution.

[0037] According to a third aspect of the present application, an active suspension system is provided, comprising the motor pump according to the above technical solution, or comprising the driving assembly according to the above technical solution.

[0038] According to a fourth aspect of the present application, a vehicle is further provided, comprising the motor pump according to the above technical solution, or comprising the driving assembly according to the above technical solution, or comprising the active suspension system according to the above technical solution.

[0039] In the motor pump provided by the embodiments of the present application, the variable speed mechanism is integrated between the driving mechanism and the pumping mechanism, so that the power output by the driving mechanism can be transmitted to the pumping mechanism after being adjusted by the variable speed mechanism. Through the arrangement of the variable speed mechanism, the output torque can be adjusted, so that there is a certain speed difference between the speed transmitted to the pumping mechanism and the output speed of the driving mechanism. With the introduction of the speed difference, the working speed range that the driving mechanism can adapt to can be expanded, so that the dependence of the driving mechanism on high torque output can be effectively reduced on the premise of achieving the given pumping target.

[0040] In the case of reduced torque demand, the power demand of the driving mechanism can also be reduced accordingly, so that the structure size and weight are compressed to a certain extent, which not only helps to realize the miniaturization and lightweight design of the motor pump system, but also is beneficial to reduce the overall manufacturing cost and energy consumption. In addition, the reduction of the size of the driving mechanism also reduces the occupation of the installation space, thereby providing higher flexibility for the integrated arrangement of the motor pump in the vehicle.

[0041] Other features and advantages of the present application will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0042] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0043] For a more complete understanding of the present application and its advantages, reference is now made to the following description taken in conjunction with the accompanying drawings in which like reference numerals represent like parts throughout the various figures.

[0044] Figure 1 is a schematic view of the overall structure of the motor pump provided in the exemplary embodiment of the present disclosure; Figure 2 is a sectional view of the motor pump provided in the exemplary embodiment of the present disclosure; Figure 3 is a schematic view of the structure of the first shaft and the second shaft provided in the exemplary embodiment of the present disclosure; Figure 4 is a first partial sectional view of the motor pump provided in the exemplary embodiment of the present disclosure; Figure 5 is a second partial sectional view of the motor pump provided in the exemplary embodiment of the present disclosure; Figure 6 is another schematic view of the structure of the motor pump provided in the exemplary embodiment of the present disclosure; Figure 7 is another schematic view of the structure of the motor pump provided in the exemplary embodiment of the present disclosure; Figure 8 is another schematic view of the structure of the motor pump provided in the exemplary embodiment of the present disclosure; Figure 9 is a schematic view of the partial structure of the motor pump provided in the exemplary embodiment of the present disclosure; Figure 10 is a schematic view of the structure of the first housing provided in the exemplary embodiment of the present disclosure; Figure 11 is a side view of the first housing provided in the exemplary embodiment of the present disclosure; Figure 12 is an exploded view of the first housing provided in the exemplary embodiment of the present disclosure; Figure 13 is a schematic view of the oil cooling flow of the motor pump provided in the exemplary embodiment of the present disclosure; Figure 14 is a schematic view of the structure of the second housing provided in the exemplary embodiment of the present disclosure.

[0045] Explanation of reference numerals: 100, driving mechanism; 110, first output shaft; 120, first housing; 121, partition; 130, cooling flow channel; 140, first shaft; 141, first flow channel; 142, third opening; 143, fifth opening; 150, cover plate; 160, second fixing member; 200, variable speed mechanism; 210, first input shaft; 220, second output shaft; 230, second housing; 240, second shaft; 241, second flow channel; 242, fourth opening; 243, sixth opening; 250, sun gear; 260, planet gear; 270, inner ring gear; 280, mounting hole; 300, pumping mechanism; 310, first opening; 320, second opening; 330, second input shaft; 340, third housing; 350, pump cavity; 351, first region; 352, second region; 360, driving gear; 370, third fixing member; 400, lubricating cavity; 500, sealing member; 600, first fixing member; 700, one-way conducting member; 800, filtering structure. DETAILED DESCRIPTION

[0046] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0047] According to a first aspect of the present application, with reference to Figures 1 to 14 The present disclosure provides an electric motor pump suitable for being applied in an active suspension system of a vehicle. The active suspension system usually comprises a hydraulic oil circuit for adjusting the suspension, and the electric motor pump is in communication with the hydraulic oil circuit and can drive the hydraulic oil to flow along a preset path during work to realize active adjustment of the suspension height. By controlling the start-stop, rotation speed and rotation direction of the electric motor pump, the suspension height can be raised or lowered to adapt to different driving conditions.

[0048] With reference to Figure 1 and Figure 2 The electric motor pump comprises a driving mechanism 100, a variable speed mechanism 200 and a pumping mechanism 300. The driving mechanism 100 is used to output power and can be used to drive the pumping mechanism 300 to realize delivery of the hydraulic oil. It can be understood that the driving mechanism 100 is used to generate a rotary driving force, which is transmitted to the pumping mechanism 300 after being adjusted by the variable speed mechanism 200 to drive the pumping mechanism 300 to work.

[0049] Exemplarily, the driving mechanism 100 can be an electric motor, and an output shaft of the electric motor can be connected with an input shaft of the speed-changing mechanism 200 to form a power transmission path. The electric motor outputs rotational power when in operation, and the power is transmitted to the pumping mechanism 300 after being adjusted by the speed-changing mechanism 200, so that a pump cavity 350 in the pumping mechanism 300 generates a pressure difference to push working medium (e.g., hydraulic oil) to flow along a system oil circuit.

[0050] In some embodiments, the electric motor can be a permanent magnet synchronous motor, a brushless direct current motor, or other types of electric motors suitable for vehicle pump systems, and the specific type can be selected according to the requirements of the system on response speed, load characteristics, and spatial arrangement. The power rating of the electric motor can be designed according to the pumping demand and the required suspension adjustment response capability of the vehicle.

[0051] In some embodiments, the driving mechanism 100 is configured to output rotational power in forward rotation or reverse rotation. Specifically, the driving mechanism 100 can rotate in a forward direction or a reverse direction under the action of a control signal, so as to switch the direction of power output. This structure facilitates the driving mechanism 100 to adapt to the reversible pumping demand of the pumping mechanism 300.

[0052] This kind of controllable forward and reverse rotation output mode makes it possible to adjust the flow direction of hydraulic oil by only switching the driving direction through electric control under the premise of unchanged structure, thereby facilitating the improvement of the functional flexibility of the system and simplifying the design of the control circuit. For a vehicle suspension system that is limited in space or needs to be multifunctional, this design helps to reduce the number of components and the complexity of the system to a certain extent.

[0053] In some embodiments, the driving mechanism 100 can be a three-phase brushless direct current motor or a permanent magnet synchronous motor. This kind of motor can realize forward and reverse switching by adjusting the phase sequence of the driving current, and is suitable for the requirements of active suspension on response performance due to its fast response speed and high control precision.

[0054] In some embodiments, with reference to Figure 1 and Figure 2 the speed-changing mechanism 200 is connected with the driving mechanism 100 and is configured to adjust the rotational power output by the driving mechanism 100. Specifically, the driving mechanism 100 transmits the rotational power to the input shaft of the speed-changing mechanism 200 through the output shaft thereof, and the speed-changing mechanism 200 adjusts the rotational speed of the power and then outputs the adjusted power to the pumping mechanism 300.

[0055] By setting the speed change mechanism 200, the driving mechanism 100 and the pumping mechanism 300 form a transmission relationship with a speed difference, so that the working efficiency and adaptability of the pumping system can be improved to a certain extent. For example, the speed change mechanism 200 can be a speed reduction mechanism, which is used to reduce the speed of the driving mechanism 100 output and correspondingly increase the torque, so that the pumping mechanism 300 can generate sufficient pressure output at a lower speed, which is beneficial to improve the low-speed response performance of the system. Correspondingly, this setting also helps to reduce the maximum output torque required by the driving mechanism 100, reduce its size and power level, so as to have a positive effect on the compact design and light weight of the whole machine.

[0056] In some specific implementations, the speed change mechanism 200 can include a set of meshing gear pairs, such as a planetary gear set, a parallel shaft helical gear set, or other forms of mechanical transmission structure, which can be packaged in an independent housing and connected to the pumping mechanism 300 through an output shaft. This structure form is beneficial to improve the structural strength and transmission efficiency of the speed change mechanism 200, and is convenient for subsequent maintenance and modular assembly.

[0057] It should be understood that in order to adapt to the function that the driving mechanism 100 can rotate forward and reverse, the speed change mechanism 200 is also configured to perform forward transmission when the driving mechanism 100 rotates forward, and perform reverse transmission when the driving mechanism 100 reverses. In other words, the speed change mechanism 200 has the ability of bidirectional power transmission, so as to effectively transmit the rotating power of the driving mechanism 100 to the pumping mechanism 300 under different rotating states.

[0058] Through this setting, the motor pump can realize forward and reverse pumping operation on the same structure basis without additional additional reversing gear set or control valve structure, thereby simplifying the structure of the mechanical system to a certain extent and improving the compactness and response efficiency of the whole machine. In addition, the speed change mechanism 200 can still maintain stable speed reduction ratio and output characteristics under forward and reverse states, which is beneficial to ensure the performance consistency and smoothness of the pumping mechanism 300 under different rotating directions.

[0059] In some embodiments, referring to Figure 1 and Figure 2 , the pumping mechanism 300 is connected with the speed change mechanism 200 and / or the driving mechanism 100, for receiving the speed-changed rotating power to drive fluid delivery. Specifically, the pumping mechanism 300 can be connected with the output shaft of the speed change mechanism 200 through its input shaft, so as to receive the speed-changed rotating power and realize pressure delivery of the working medium in the pump cavity 350.

[0060] By arranging the pumping mechanism 300 downstream of the variable speed mechanism 200, a certain transmission ratio relationship can be established between the operating speed of the pumping mechanism 300 and the output speed of the driving mechanism 100, thereby improving the fluid conveying efficiency and the adaptability of the system to a certain extent. This structural configuration is not only suitable for forward conveying working conditions, but also suitable for reverse flow scenarios, especially when the driving mechanism 100 has forward and reverse rotation capabilities, the pumping mechanism 300 can also switch the inlet and outlet according to the change of the rotation direction, meeting the functional requirements of reversible pumping.

[0061] In specific implementations, the pumping mechanism 300 can be a gear pump, a vane pump, or other pump types suitable for bidirectional fluid conveying. Taking a gear pump as an example, it is internally provided with a pair of driving and driven gears that mesh with each other, and during rotation, a negative pressure can be formed on the inlet side and a positive pressure can be formed on the outlet side, thereby pushing the hydraulic oil to flow in the system oil circuit. This structure is relatively compact, has high transmission efficiency, and is suitable for use in vehicle active suspension systems with limited space and high response requirements.

[0062] In some embodiments, referring to Figure 1 and Figure 2 , the pumping mechanism 300 includes a first opening 310 and a second opening 320, and the pumping mechanism 300 is configured such that when the driving mechanism 100 rotates forward, the first opening 310 serves as the fluid inlet and the second opening 320 serves as the fluid outlet; when the driving mechanism 100 reverses, the second opening 320 serves as the fluid inlet and the first opening 310 serves as the fluid outlet.

[0063] This structural arrangement enables the pumping mechanism 300 to complete reversible pumping action under different rotation directions, which is beneficial for actively controlling the flow direction of the hydraulic oil and suitable for different working conditions in vehicle active suspension systems that require lifting or lowering of the suspension height.

[0064] In some embodiments, the pumping mechanism 300 can adopt a symmetrically arranged gear pump structure, and the pumping mechanism 300 is internally provided with driving and driven gears, and the first opening 310 and the second opening 320 are respectively located on opposite sides of the pump body and are in communication with both ends of the gear meshing area. Since the gears can form a low pressure area on the inlet side and a high pressure area on the outlet side during meshing and rotation, when the rotation direction of the gears changes, the fluid pressure sending direction also reverses, thereby achieving switching of the pumping path.

[0065] Through this structural design, the pumping mechanism 300 can regulate the flow direction of the fluid in cooperation with the forward and reverse rotation of the driving mechanism 100 without adding additional reversing valves or control structures, which simplifies the system configuration, improves the control efficiency, and also helps to reduce the overall volume and installation space requirements.

[0066] In some embodiments, referring to Figure 2 and Figure 6The driving mechanism 100, the transmission mechanism 200 and the pumping mechanism 300 are arranged in series in the axial direction. Specifically, the output shaft of the driving mechanism 100 is connected to the input end of the transmission mechanism 200 through axial connection, and the output end of the transmission mechanism 200 is connected to the input shaft of the pumping mechanism 300 in the axial direction, forming a continuous power transmission path.

[0067] The axial series structure layout helps to simplify the overall transmission system design, reduce the gap and deviation between transmission components, and improve the efficiency and stability of power transmission. In addition, the axial arrangement is conducive to realizing compact structure design of the motor pump system, saving installation space, and meeting the strict requirements of the vehicle active suspension system on volume and weight.

[0068] At the same time, through the axial series modular design, it is also convenient for manufacturing and maintenance, and improves the assembly precision and reliability of the system.

[0069] In some embodiments, referring to Figure 7 The driving mechanism 100 and the pumping mechanism 300 are arranged in parallel, and the transmission mechanism 200 is axially connected to the driving mechanism 100 and the pumping mechanism 300. This structure shortens the overall device in the axial direction, while relatively increasing the arrangement space of the transmission mechanism 200 in the radial direction.

[0070] Based on the consideration of the overall vehicle chassis space layout, parallel arrangement is conducive to adjusting the size and transmission ratio of the transmission mechanism 200 according to the actual installation position. Due to the increase of the radial space, the transmission mechanism 200 can be designed to have a larger transmission ratio, thereby reducing the speed requirement of the driving mechanism 100 (such as the motor) to a certain extent.

[0071] Reducing the speed requirement of the driving mechanism 100 is beneficial to reducing the power level and volume of the motor, and helps to realize the lightweight and energy-saving goals of the system. At the same time, this arrangement meets the compact space requirement of the vehicle active suspension system while improving the flexibility and adaptability of the overall structure.

[0072] In some embodiments, referring to Figure 8 The driving mechanism 100 and the pumping mechanism 300 are arranged in axial intersection, and the transmission mechanism 200 is drivingly connected to the driving mechanism 100 and the pumping mechanism 300. Compared with the structure of the axial series or parallel arrangement of the driving mechanism 100 and the pumping mechanism 300, the axial intersection arrangement further reduces the axial size of the overall device, while the radial size increases.

[0073] Based on the specific layout requirements of the vehicle chassis space, the axial intersection structure can more flexibly utilize the limited space in the vehicle body, and is conducive to reserving more installation space for the transmission mechanism 200 in the radial direction.

[0074] In some embodiments, referring to Figure 2 and Figure 3 , the drive mechanism 100 comprises a first output shaft 110, the transmission mechanism 200 comprises a first input shaft 210 and a second output shaft 220, and the pumping mechanism 300 comprises a second input shaft 330. The first output shaft 110 is drivingly connected to the first input shaft 210, and the second output shaft 220 is drivingly connected to the second input shaft 330.

[0075] Through the above driving connection relationship, the rotary power output by the drive mechanism 100 can be transmitted to the pumping mechanism 300 after the adjustment of the rotation speed and the torque by the transmission mechanism 200, thereby realizing the effective driving of the fluid. This structure is conducive to building a compact power transmission link, improving transmission efficiency, and facilitating the flexible design of various transmission ratios.

[0076] In some embodiments, referring to Figure 2 and Figure 3 , the first output shaft 110, the first input shaft 210, the second output shaft 220, and the second input shaft 330 are coaxially arranged. This coaxial arrangement is conducive to realizing the straight transmission of power, simplifying the structure design, and improving the transmission efficiency.

[0077] In some embodiments, referring to Figure 7 , the first output shaft 110 and the first input shaft 210 are coaxially arranged, the second output shaft 220 and the second input shaft 330 are coaxially arranged, and the first input shaft 210 and the second output shaft 220 are arranged in parallel. This arrangement can adapt to various spatial layout requirements while ensuring stable transmission, improving the flexibility of the structure.

[0078] In some embodiments, referring to Figure 8 , the first output shaft 110, the first input shaft 210, and the second output shaft 220 are coaxially arranged, and the second input shaft 330 intersects the second output shaft 220. This arrangement is suitable for complex power transmission paths and is conducive to rational use of space and meeting specific installation requirements. For example, the second input shaft 330 is perpendicular to the second output shaft 220.

[0079] In some embodiments, referring to Figure 1 and Figure 2 , the housings of the drive mechanism 100, the transmission mechanism 200, and the pumping mechanism 300 are fixedly connected and collectively form a lubrication cavity 400 that is in communication with each other, and the lubrication cavity 400 is used to accommodate lubricating fluid. By forming an integrated lubrication mode, the lubricating fluid can freely circulate between the drive mechanism 100, the transmission mechanism 200, and the pumping mechanism 300, thereby benefiting the reduction of friction and wear, improving the operation stability and service life of each mechanism. At the same time, this design is conducive to simplifying the arrangement of the lubrication system, reducing the number of parts, and improving the reliability of the overall device.

[0080] In addition, the structure facilitates the platform design of the motor pump as a whole, helps to realize the modular manufacturing and assembly, improves the universality and maintenance convenience of the product, and meets the adaptation requirements of different vehicle active suspension systems.

[0081] In some embodiments, a seal 500 is arranged at the connection between the driving mechanism 100, the transmission mechanism 200, and the pumping mechanism 300. The seal 500 adopts a static sealing manner to realize the sealing isolation between the mechanisms inside the motor pump.

[0082] The static sealing structure is beneficial to simplify the design of the sealing system, reduce the complexity and manufacturing cost of the components. At the same time, the static sealing has high sealing reliability due to the absence of moving friction surface, which can reduce the risk of leakage and maintenance requirements to a certain extent.

[0083] The sealing structure is beneficial to ensure that the lubricating fluid and the working medium do not cross and leak between the cavities, thereby improving the operation stability and service life of the motor pump as a whole. In addition, the simplicity of the static sealing also helps to realize the compact design and modular assembly of the device.

[0084] For example, the seal 500 can be a sealing ring, a sealing gasket, an O-ring, and an oil seal, etc. The above-mentioned seal 500 can form an effective seal at the connection of the driving mechanism 100, the transmission mechanism 200, and the pumping mechanism 300, reduce the leakage of lubricating oil, and be beneficial to improve the sealing performance and operation reliability of the motor pump.

[0085] In some embodiments, referring to Figure 1 and Figure 2 the driving mechanism 100 includes a first housing 120, the transmission mechanism 200 includes a second housing 230, and the pumping mechanism 300 includes a third housing 340. The first housing 120, the second housing 230, and the third housing 340 are fixedly connected and collectively enclose a lubricating cavity 400. The seal 500 is arranged between the first housing 120 and the second housing 230, and / or between the second housing 230 and the third housing 340.

[0086] The seal 500 is arranged between the first housing 120 and the second housing 230, and / or between the second housing 230 and the third housing 340, to realize the sealing of the housing connection, prevent the leakage of lubricating fluid, and ensure the airtightness and lubrication effect of the lubricating cavity 400. The structure is beneficial to realize the integrated design of the lubricating system of the motor pump as a whole, improve the lubrication efficiency and system stability, and facilitate the modular manufacturing and maintenance.

[0087] In some embodiments, referring to Figure 1 and Figure 2The first housing 120, the second housing 230 and the third housing 340 are axially fixedly connected by the first fixing member 600. By tightening the first fixing member 600, axial pressing force is generated between the first housing 120, the second housing 230 and the third housing 340, and the anti-loosening and torque transmission functions are realized by the friction force between the end faces of the three housings.

[0088] The fixing manner is beneficial to simplify the housing connection structure, reduce the assembly complexity, and at the same time, can ensure the close fit between the housings, and improve the overall mechanical strength and transmission stability.

[0089] Exemplarily, the first fixing member 600 can be a fastener such as a bolt, a screw rod and a pin. The fastener axially connects the first housing 120, the second housing 230 and the third housing 340, realizes the stable fixing of the housings, and is beneficial to improve the reliability and rigidity of the overall structure of the motor pump.

[0090] In some embodiments, referring to Figure 4 and Figure 5 The lubricating cavity 400 of the motor pump is in communication with the pump cavity 350 of the pumping mechanism 300. Through the communication structure, the lubricating oil can flow from the pump cavity 350 into the lubricating cavity 400, realizing effective lubrication of the internal moving parts of the motor pump.

[0091] The design is beneficial to improve the circulation efficiency of the lubricating oil, reduce internal friction and wear, and thus enhance the overall operation stability and service life of the motor pump.

[0092] In some embodiments, referring to Figure 4 and Figure 5 The driving mechanism 100 includes a first shaft 140, and a part of the first shaft 140 constitutes an input shaft of the speed changing mechanism 200. The speed changing mechanism 200 includes a second shaft 240, and a part of the second shaft 240 constitutes an input shaft of the pumping mechanism 300. Through the above structure, the driving mechanism 100, the speed changing mechanism 200 and the pumping mechanism 300 are highly integrated, which is beneficial to compress the axial size and reduce the overall volume and weight.

[0093] In addition, the common design of part of the structure can reduce the equipment size, simplify the assembly process, and thus reduce the system complexity. The integrated design is beneficial to improve the integration and operation efficiency of the motor pump, and is suitable for the vehicle active suspension system which has high requirements on space and weight.

[0094] In some embodiments, referring to Figure 2 and Figure 5The first shaft 140 is provided with a first flow channel 141, one end of the first flow channel 141 is configured to communicate with the pump cavity 350, and the other end is configured to communicate with the lubricating cavity 400. The first flow channel 141 is configured to drive the fluid to circulate between the pump cavity 350 and the lubricating cavity 400 when the pumping mechanism 300 is running. This design is beneficial to realize the circulating flow of the lubricating oil in the pump cavity 350 in the lubricating cavity 400, thereby improving the lubricating effect. At the same time, the fluid circulation process can take away the heat generated during the operation of the driving mechanism 100, the speed changing mechanism 200 and the pumping mechanism 300, which helps to reduce the internal temperature and improve the operation stability and service life of the motor pump.

[0095] In some embodiments, referring to Figure 2 and Figure 4 , the second shaft 240 is provided with a second flow channel 241, one end of the second flow channel 241 is configured to communicate with the lubricating cavity 400, and the other end is configured to communicate with the pump cavity 350. The second flow channel 241 is configured to drive the fluid to circulate between the lubricating cavity 400 and the pump cavity 350 when the pumping mechanism 300 is running. This structure is beneficial to promote the circulation of the lubricating oil in the lubricating cavity 400, enhance the lubricating effect, and at the same time help the effective conduction and dissipation of heat of the driving mechanism 100 and the pumping mechanism 300, improve the operation stability and durability of the overall system.

[0096] In some embodiments, referring to Figure 4 and Figure 5 , the first flow channel 141 and the second flow channel 241 are in communication, and the second flow channel 241 is configured to drive the fluid to enter the first flow channel 141 via the second flow channel 241 and circulate between the lubricating cavity 400 and the pump cavity 350 when the pumping mechanism 300 is running. This communication structure is beneficial to promote the effective circulation of the lubricating oil between the lubricating cavity 400 and the pump cavity 350, improve the lubricating effect, and at the same time help to take away the heat generated during the operation of the driving mechanism 100 and the pumping mechanism 300, thereby improving the overall operation stability and service life of the motor pump.

[0097] In some embodiments, referring to Figure 4 and Figure 5 , the first shaft 140 and the second shaft 240 are coaxially arranged, the first shaft 140 is provided with a third opening 142, the third opening 142 is in communication with the first flow channel 141, and the first opening 310 of the pumping mechanism 300 is located at one end of the first shaft 140 close to the second shaft 240. The second shaft 240 is provided with a fourth opening 242, the fourth opening 242 is in communication with the second flow channel 241, the fourth opening 242 is located at one end of the second shaft 240 close to the first shaft 140, and the third opening 142 and the fourth opening 242 are oppositely arranged.

[0098] Through the relative arrangement of the third opening 142 and the fourth opening 242, the lubricating oil can enter the first flow channel 141 from the second flow channel 241, realizing the delivery of the lubricating oil between the two relatively rotating shafts. In view of the difference in rotational speed between the first shaft 140 and the second shaft 240, the two shafts cannot be directly mechanically connected, and through the design of the third opening 142 and the fourth opening 242 described above, the lubricating oil can be effectively exchanged in the first flow channel 141 and the second flow channel 241.

[0099] In addition, the lubricating oil located in the second flow channel 241 can also flow out through the fourth opening 242 to the inside of the transmission mechanism 200, providing more effective lubrication and cooling for the transmission mechanism 200, and promoting the stable operation and life extension of the overall system.

[0100] In some embodiments, referring to Figure 4 and Figure 5 , the first shaft 140 is provided with a fifth opening 143 at one end away from the second shaft 240, and the first flow channel 141 communicates with the lubricating cavity 400 through the fifth opening 143. That is, the first flow channel 141 extends axially along the first shaft 140, which is conducive to taking away more heat from the driving mechanism 100.

[0101] In addition, the lubricating oil flowing out of the fifth opening 143 is located at the end of the motor pump, and when the lubricating oil circulates to the pump cavity 350, that is, the other end of the motor pump, it can cover and contact various moving parts in the pump cavity 350, thereby realizing more comprehensive lubrication and cooling effect, which is beneficial to avoid the generation of lubrication dead angle and improve the service life and operation stability of internal parts.

[0102] In some embodiments, referring to Figure 4 and Figure 5 , the second shaft 240 is provided with a sixth opening 243 at one end away from the first shaft 140, and the second flow channel 241 communicates with the pump cavity 350 through the sixth opening 243. This structure enables the lubricating oil to enter the second flow channel 241 through the sixth opening 243, realizing the circulation path of the lubricating oil.

[0103] This design is beneficial to promote the flow of lubricating oil between the pump cavity 350 and the second flow channel 241, thereby effectively lubricating the pumping mechanism 300 and related parts, improving the lubrication efficiency and the operation stability of the system.

[0104] In some embodiments, referring to Figure 4 and Figure 5 , the lubricating cavity 400 and the pump cavity 350 communicate through a one-way conducting piece 700; when the fluid pressure in the lubricating cavity 400 is greater than the pressure in the pump cavity 350, the one-way conducting piece 700 is configured to allow the fluid to enter the pump cavity 350 through the one-way conducting piece 700.

[0105] Specifically, during the operation of the motor pump, the driving mechanism 100, the speed change mechanism 200 and other components will generate certain agitation and pressurization to the lubricating oil in the moving state, so that the local pressure in the lubricating cavity 400 is higher than the pressure in the pump cavity 350. When the pressure in the lubricating cavity 400 exceeds the set opening pressure, the one-way conducting piece 700 is opened, and the lubricating oil flows from the lubricating cavity 400 into the pump cavity 350, realizing the automatic flow and dynamic balance of the lubricating oil between different functional cavities.

[0106] Exemplarily, the one-way conducting piece 700 can be a one-way valve, for example, a spring-loaded one-way valve, which includes a valve seat, a valve core and an elastic element. The valve seat is fixed in the communication passage between the lubricating cavity 400 and the pump cavity 350, and the valve core is reset towards the closing direction under the action of the elastic element. When the pressure in the lubricating cavity 400 is greater than the pressure on the pump cavity 350 side and exceeds the opening force of the valve core, the valve core is pushed open against the elastic force, thereby forming a fluid passage.

[0107] Referring to Figure 13 , the arrows in the figure are the lubricating oil flow direction and path.

[0108] In some embodiments, referring to Figure 4 and Figure 5 , the pump cavity 350 includes a first region 351 and a second region 352. When the first opening 310 of the pumping mechanism 300 serves as a fluid inlet, the first region 351 is a high-pressure region, and the second region 352 is a low-pressure region. When the second opening 320 of the pumping mechanism 300 serves as a fluid inlet, the first region 351 is a low-pressure region, and the second region 352 is a high-pressure region. The one-way conducting piece 700 is arranged to communicate with at least the low-pressure region in the first region 351 and / or the second region 352. By communicating the one-way conducting piece 700 with the low-pressure region in the pump cavity 350, the lubricating oil in the lubricating cavity 400 can flow into the pump cavity 350 under the action of the pressure difference, realizing the automatic replenishment and circulation of the lubricating oil.

[0109] This structure helps the lubricating oil to preferentially enter the region with lower pressure in the pump cavity 350, thereby avoiding the situation of insufficient lubrication due to high pressure blockage, benefiting the lubrication effect of the moving components inside the pump cavity 350, and helping to maintain the dynamic balance of the lubricating oil in the system.

[0110] It can be understood that, since the high-pressure region and the low-pressure region in the pump cavity 350 will switch under different working conditions of the driving mechanism 100 in forward rotation and reverse rotation, in order to realize that the lubricating cavity 400 is always in communication with the low-pressure region, the one-way conducting piece 700 can be arranged between the lubricating cavity 400 and the first region 351, and between the lubricating cavity 400 and the second region 352.

[0111] In some embodiments, the number of one-way valves 700 can be multiple, for example, a separate one-way valve 700 is arranged in the first area 351 and the second area 352 respectively, so that the lubricating cavity 400 can be in communication with the current low pressure area in different rotation directions, thereby realizing reliable replenishment of lubricating oil to the pump cavity 350 and improving lubrication efficiency.

[0112] In other embodiments, only one one-way valve 700 can be arranged, and a switching device is used to make the one-way valve 700 selectively communicate with the first area 351 or the second area 352 according to the change of the pump cavity 350 pressure area position when the driving mechanism 100 is rotating forward and reversing. The switching device can be a mechanical flow valve, a magnetic control switch or an electric slide valve, and the specific structure can be designed according to the system arrangement and control mode.

[0113] Compared with the above, the structure of using multiple one-way valves 700 is relatively simple, which can avoid introducing a complex switching mechanism, has a certain degree of arrangement flexibility and control simplification advantage, and is suitable for application scenarios with high requirements for reliability and response speed.

[0114] In some embodiments, the one-way valve 700 is arranged between the first area 351 and the lubricating cavity 400 and between the second area 352 and the lubricating cavity 400. This structure design makes the current low pressure area be able to communicate with the lubricating cavity 400 through the corresponding one-way valve 700 whether the driving mechanism 100 is in the forward rotation condition or the reverse rotation condition, thereby realizing continuous replenishment and circulation of lubricating oil.

[0115] By arranging the one-way valve 700 in both areas, the change of pumping direction can be adapted without introducing additional switching devices, the control logic is simplified, and the stability of system operation and the flexibility of structure arrangement are improved.

[0116] In some embodiments, referring to Figure 2 and Figure 11 , the first housing 120 of the driving mechanism 100 is provided with a cooling flow channel 130. The cooling flow channel 130 is used to accommodate the flow of cooling liquid to absorb the heat generated by the driving mechanism 100 during operation, thereby reducing the temperature rise to a certain extent, improving the working environment, and improving the thermal stability and service life of the driving mechanism 100.

[0117] In some embodiments, referring to Figure 9 and Figure 11The cooling flow channel 130 is arranged along the circumference of the first housing 120. This arrangement is beneficial for the cooling liquid to form a circumferential flow inside the housing, enhancing the coverage of the inner surface of the housing and the heat removal effect, thereby improving the heat dissipation efficiency of the drive mechanism 100, promoting uniform temperature distribution, and being conducive to maintaining the thermal stability of the drive mechanism 100.

[0118] In some embodiments, with reference to Figure 11 and Figure 12 The cooling flow channel 130 is provided with a plurality of partitions 121, which are arranged in the cooling flow channel 130 in a staggered manner along the circumference and the axis of the first housing 120. This structure design helps to prolong the flow path of the cooling liquid, increase the heat exchange area between the cooling liquid and the inner wall of the housing, thereby improving the cooling effect, promoting uniform distribution of the housing temperature, and enhancing the thermal management performance of the drive mechanism 100.

[0119] In some embodiments, with reference to Figure 10 and Figure 12 The cooling flow channel 130 is arranged along the axis of the first housing 120, and the cooling flow channel 130 is provided with a cover plate 150 at both ends of the axis of the first housing 120 for sealing the cooling flow channel 130. This structure is beneficial for forming a closed cooling loop to prevent cooling liquid leakage, while facilitating manufacturing and assembly, improving the simplicity and reliability of the production process.

[0120] In some embodiments, the pumping mechanism 300 includes a gear pump. The gear pump has a simple structure and can realize stable fluid delivery, which is suitable for the driving requirements of the hydraulic oil circuit of the vehicle active suspension system.

[0121] In some embodiments, with reference to Figure 4 and Figure 5 The transmission mechanism 200 includes a speed reduction structure. The speed reduction structure is used to change the rotational power output by the drive mechanism 100, which is beneficial for adjusting the rotational speed and torque of the pumping mechanism 300 to meet the driving requirements under different working conditions.

[0122] In some embodiments, the transmission mechanism 200 includes a planetary reducer. The planetary reducer has a compact size and high transmission efficiency, and can achieve a large reduction ratio in a limited space, thereby helping to reduce the rotational speed requirement and torque load of the drive mechanism 100 and improving the overall performance of the system.

[0123] In some embodiments, the transmission mechanism 200 comprises a sun gear 250, a planet gear 260 and an inner ring gear 270. The sun gear 250 is connected to the output shaft of the driving mechanism 100. The planet gear 260 is engaged with the sun gear 250. The inner ring gear 270 is engaged with the planet gear 260. The planet gear 260 is connected to the second shaft 240 of the transmission mechanism 200, which is drivingly connected to the pumping mechanism 300. This compact structure is beneficial for achieving efficient transmission and volume saving, which helps to reduce the overall size of the system and is suitable for the layout requirements of limited space in a vehicle active suspension system.

[0124] In some embodiments, referring to Figure 4 and Figure 5 , the pumping mechanism 300 comprises a gear pump, and a driving gear 360 of the gear pump is drivingly connected to the second shaft 240. Through this connection mode, the rotational power output by the transmission mechanism 200 can be effectively transmitted to the gear pump, realizing stable delivery of fluid and being beneficial for meeting the performance requirements of hydraulic drive in a vehicle active suspension system.

[0125] In some embodiments, the driving gear 360 of the pumping mechanism 300 is sleeved on the second shaft 240 and is limitedly matched with the second shaft 240 in the circumferential direction of the second shaft 240. Through this structure, the pumping mechanism 300 shares the second shaft 240 with the transmission mechanism 200, which is beneficial for reducing the overall weight, reducing the volume and reducing the number of parts, thereby improving the integration and reliability of the system and being suitable for vehicle active suspension systems with high space and mass requirements.

[0126] In some embodiments, referring to Figure 4 and Figure 5 , the sun gear 250 is interference-connected to the first shaft 140 of the driving mechanism 100. The transmission mechanism 200 shares the first shaft 140 with the driving mechanism 100. This structure is beneficial for achieving close coupling between the driving mechanism 100 and the transmission mechanism 200, improving transmission rigidity and stability, while being beneficial for reducing the overall structure size and meeting the requirements of compact layout in a vehicle active suspension system.

[0127] In some embodiments, referring to Figure 9 and Figure 14 , the motor pump further comprises a filter structure 800 arranged in the lubricating cavity 400 of the motor pump to filter metal particles in the lubricating cavity 400 of the motor pump. The filter structure 800 is used to filter metal particles in the lubricating cavity 400, which is beneficial for adsorbing and removing metal impurities in the hydraulic oil, reducing the risk of wear of internal elements and actuators of the motor pump, thereby improving the reliability and service life of the system.

[0128] The filter structure 800 can include, but is not limited to, a mechanical filter screen, a magnetic filter core, a composite filter core, and the like. The mechanical filter screen can physically block solid particles in the lubricating oil, and is suitable for filtering larger particles. The magnetic filter core can use magnetic materials to adsorb metal particles in the lubricating oil, and is beneficial for removing ferromagnetic impurities and reducing wear of internal components. The composite filter core combines the advantages of mechanical filter screens and magnetic materials, and can simultaneously filter non-magnetic and magnetic particles.

[0129] For example, the mechanical filter screen can be a stainless steel woven mesh with a pore size determined according to system requirements, which can effectively filter out large particle impurities while ensuring oil flow. The magnetic filter core can have a ring or rod structure, and is installed in the flow path of the lubricating cavity 400 for easy cleaning and replacement.

[0130] By reasonably selecting and arranging the filter structure 800, the cleanliness of the lubricating oil can be effectively improved, and the wear risk during equipment operation can be reduced, thereby enhancing the service life and operation stability of the motor pump and its key components.

[0131] In some embodiments, referring to Figure 9 and Figure 14 , the filter structure 800 is arranged in at least one of the variable speed mechanism 200, the drive mechanism 100, and the pumping mechanism 300. This arrangement helps to filter impurities in the lubricating oil at key locations in the system, thereby reducing metal particle wear on internal components of each mechanism and improving the durability and operation stability of the overall equipment.

[0132] In some embodiments, the filter structure 800 includes a magnetic oil filter structure. The magnetic oil filter structure uses magnetic materials to adsorb metal particles in the lubricating oil, which is beneficial for effectively removing metal impurities, reducing wear on internal components of the motor pump, and improving the operation reliability and service life of the system.

[0133] In some embodiments, referring to Figure 9 and Figure 14 , the second housing 230 of the variable speed mechanism 200 is provided with a mounting hole 280, and the filter structure 800 is mounted in the mounting hole 280. The filter structure 800 is mounted in the mounting hole 280. This structure design is beneficial for stable installation and easy maintenance of the filter structure 800, and can effectively filter lubricating oil flowing through the lubricating cavity 400 of the variable speed mechanism 200, thereby improving the cleanliness of the lubricating system and the reliability of the equipment.

[0134] In some embodiments, referring to Figure 4 and Figure 5The first housing 120 of the driving mechanism 100 is provided with a second fixing member 160 for connecting with external devices. The second fixing member 160 can be used to connect external fixing supports, which is beneficial to realize stable installation of the motor pump unit in the whole vehicle, facilitate design of the suspension system according to actual arrangement requirements of the whole vehicle, and promote modularization and platformization development of the system.

[0135] Exemplarily, the second fixing member 160 can include a double-headed bolt. The double-headed bolt is fixed to the first housing 120 of the driving mechanism 100 by one end and connected to the external fixing support by the other end, which can realize firm and detachable installation and is beneficial to improve fixing stability and maintenance convenience of the motor pump unit in the whole vehicle. The second fixing member 160 can also be a combination of a screw rod and a nut.

[0136] In some embodiments, the third housing 340 of the pumping mechanism 300 is provided with a third fixing member 370 for connecting with external devices. The third fixing member 370 is beneficial to independent fixing of the pumping mechanism 300 or connection with other components, further improving installation flexibility and reliability of the overall system.

[0137] Exemplarily, the third fixing member 370 can include a double-headed bolt. The double-headed bolt is fixed to the third housing 340 of the pumping assembly by one end and connected to the external fixing support by the other end, which can realize firm and detachable installation and is beneficial to improve fixing stability and maintenance convenience of the motor pump unit in the whole vehicle. The third fixing member 370 can also be a combination of a screw rod and a nut.

[0138] In some embodiments, referring to Figure 4 and Figure 5 , the driving mechanism 100 includes the first housing 120, the transmission mechanism 200 includes the second housing 230, and the second housing 230 is connected with the first housing 120 and used to support the first shaft 140 of the driving mechanism 100. Through this structural design, the driving mechanism 100 can share the first housing 120 and the second housing 230, realize integration and compactness of the structure, which is beneficial to improve overall rigidity and stability, and at the same time helps to reduce the volume and simplify the assembly process.

[0139] Exemplarily, in order to reduce the volume and compress the axial space, the second housing 230 is installed on the driving mechanism 100, and the second housing 230 is matched with the first housing 120 through a stopper to form an overall structure and become a part of the driving mechanism 100. This matching structure is beneficial to provide stable support for the first shaft 140 and improve the axial rigidity, and at the same time realizes the integrated design of the housing of the driving mechanism 100, thereby reducing the overall size and optimizing the installation space.

[0140] According to a second aspect of the present disclosure, a drive assembly is provided, comprising the motor pump in the above embodiments. The drive assembly has all the beneficial effects of the motor pump described above, which will not be repeated here.

[0141] According to a third aspect of the present disclosure, an active suspension system is provided, comprising the motor pump in the above embodiments, or comprising the drive assembly in the above embodiments. The active suspension system has all the beneficial effects of the motor pump or the drive assembly described above, which will not be repeated here.

[0142] According to a fourth aspect of the present disclosure, a vehicle is provided, comprising the motor pump in the above embodiments, or comprising the drive assembly in the above embodiments, or comprising the active suspension system in the above embodiments. The vehicle has all the beneficial effects of the motor pump, the drive assembly or the active suspension system described above, which will not be repeated here.

[0143] The vehicle can be a fuel automobile, a plug-in hybrid electric vehicle, a new energy vehicle, etc., which is not specifically limited by the present disclosure.

[0144] In the description of the present application, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0145] In the above embodiments, the description of each embodiment is focused on, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0146] The embodiments, implementation manners and related technical features of the present application can be combined, replaced or modified without conflict, as long as they do not deviate from the technical solutions of the present application.

[0147] The above is only the preferred embodiment of the present application, and does not limit the present application in any form. Any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present application, without deviating from the technical solutions of the present application, still falls within the scope of the technical solutions of the present application.

Claims

1. An electric motor pump characterized by, The motor pump comprises: a driving mechanism for outputting rotational power; a speed changing mechanism connected with the driving mechanism, for changing the rotational power outputted by the driving mechanism; and a pumping mechanism connected with the speed changing mechanism and / or the driving mechanism, for receiving the rotational power after the change of speed, to drive fluid delivery.

2. The motor pump of claim 1, wherein, The driving mechanism is used for outputting rotational power in forward rotation or reverse rotation; The pumping mechanism comprises a first opening and a second opening, and the pumping mechanism is configured as: when the driving mechanism rotates forward, the first opening serves as a fluid inlet and the second opening serves as a fluid outlet; when the driving mechanism rotates reversely, the second opening serves as a fluid inlet and the first opening serves as a fluid outlet.

3. The motor pump of claim 1, wherein, The driving mechanism, the speed changing mechanism and the pumping mechanism are arranged in series in the axial direction; or, The driving mechanism and the pumping mechanism are arranged in parallel, and the speed changing mechanism is axially connected with the driving mechanism and the pumping mechanism respectively; or, The driving mechanism and the pumping mechanism are arranged in axial intersection, and the speed changing mechanism is drivingly connected with the driving mechanism and the pumping mechanism respectively.

4. The motor pump of claim 1, wherein, The driving mechanism comprises a first output shaft, the speed changing mechanism comprises a first input shaft and a second output shaft, and the pumping mechanism comprises a second input shaft, the first output shaft is drivingly connected with the first input shaft, and the second output shaft is drivingly connected with the second input shaft.

5. The motor pump of claim 4, wherein, The first output shaft, the first input shaft, the second output shaft and the second input shaft are coaxially arranged; or, The first output shaft and the first input shaft are coaxially arranged, the second output shaft and the second input shaft are coaxially arranged, and the first input shaft and the second output shaft are arranged in parallel; or, The first output shaft, the first input shaft and the second output shaft are coaxially arranged, and the second input shaft intersects with the second output shaft.

6. The motor pump of claim 1, wherein, The housings of the driving mechanism, the speed changing mechanism and the pumping mechanism are fixedly connected and jointly enclose a lubricating cavity in communication with each other, and the lubricating cavity is used for containing lubricating fluid.

7. The motor pump of claim 6, wherein, Sealing members are arranged at the connections between the driving mechanism, the speed changing mechanism and the pumping mechanism.

8. The motor pump of claim 7, wherein, The driving mechanism comprises a first housing, the speed changing mechanism comprises a second housing, and the pumping mechanism comprises a third housing, the first housing, the second housing and the third housing are fixedly connected and jointly enclose the lubricating cavity; The sealing members are arranged between the first housing and the second housing and / or between the second housing and the third housing.

9. The motor pump of claim 8, wherein, The first housing, the second housing and the third housing are axially fixedly connected by a first fixing member.

10. The motor pump of claim 1, wherein, The lubricating cavity of the motor pump is in communication with a pump cavity of the pumping mechanism.

11. The motor pump of claim 10, wherein, The driving mechanism comprises a first shaft, a part of the first shaft constitutes an input shaft of the speed changing mechanism; the speed changing mechanism comprises a second shaft, a part of the second shaft constitutes an input shaft of the pumping mechanism.

12. The motor pump of claim 11, wherein, A first flow channel is arranged in the first shaft, one end of the first flow channel is used for communication with the pump cavity, and the other end is used for communication with the lubricating cavity; The first flow channel is configured to circulate fluid between the pump cavity and the lubricating cavity when the pumping mechanism operates.

13. The motor pump of claim 12, wherein, The second shaft is provided with a second flow channel, one end of the second flow channel is communicated with the lubricating cavity, and the other end is communicated with the pump cavity; The second flow channel is configured to drive the pumping mechanism to circulate fluid between the lubricating cavity and the pump cavity when the pumping mechanism is running.

14. The motor pump of claim 13, wherein, The first flow channel is communicated with the second flow channel, and the second flow channel is configured to drive the pumping mechanism to circulate fluid between the lubricating cavity and the pump cavity via the second flow channel when the pumping mechanism is running.

15. The motor pump of claim 13, wherein, The first shaft and the second shaft are coaxially arranged, the first shaft is provided with a third opening, the third opening is communicated with the first flow channel, and the first opening of the pumping mechanism is located at one end of the first shaft close to the second shaft; The second shaft is provided with a fourth opening, the fourth opening is communicated with the second flow channel, the fourth opening is located at one end of the second shaft close to the first shaft, and the third opening and the fourth opening are oppositely arranged.

16. The motor pump of claim 13, wherein, The first shaft is provided with a fifth opening at one end away from the second shaft, and the first flow channel is communicated with the lubricating cavity through the fifth opening; and / or, The second shaft is provided with a sixth opening at one end away from the first shaft, and the second flow channel is communicated with the pump cavity through the sixth opening.

17. The motor pump of claim 10, wherein, The lubricating cavity and the pump cavity are communicated through a one-way conducting member; the one-way conducting member is configured to allow fluid to enter the pump cavity through the one-way conducting member when the fluid pressure in the lubricating cavity is greater than the pressure in the pump cavity.

18. The motor pump of claim 17, wherein, The pump cavity comprises a first region and a second region; When the first opening of the pumping mechanism serves as a fluid inlet, the first region is a high-pressure region, and the second region is a low-pressure region; When the second opening of the pumping mechanism serves as a fluid inlet, the first region is a low-pressure region, and the second region is a high-pressure region; The one-way conducting member is arranged to communicate with at least the low-pressure region in the first region and / or the second region.

19. The motor pump of claim 18, wherein, The one-way conducting member is arranged between the first region and the lubricating cavity and between the second region and the lubricating cavity.

20. The motor pump of claim 1, wherein, The first housing of the driving mechanism is provided with a cooling flow channel.

21. The motor pump of claim 20, wherein, The cooling flow channel is arranged along the circumference of the first housing; and / or, The cooling flow channel is provided with a plurality of partitions, and the plurality of partitions are staggered in the cooling flow channel to form a path structure extending along the circumference and the axis of the first housing.

22. The motor pump of claim 20, wherein, The cooling flow channel is arranged along the axis of the first housing, and the cooling flow channel is provided with a cover plate at both ends of the first housing in the axial direction to seal the cooling flow channel.

23. The motor pump of claim 1, wherein, The pumping mechanism comprises a gear pump; and / or, The variable speed mechanism comprises a speed reduction structure; and / or, The variable speed mechanism comprises a planetary reducer.

24. The motor pump of claim 23, wherein, The variable speed mechanism comprises: A sun gear connected to the output shaft of the driving mechanism; A planet gear engaged with the sun gear; An inner ring gear engaged with the planet gear; The planet gear is connected to the second shaft of the variable speed mechanism, and the second shaft is drivingly connected to the pumping mechanism.

25. The motor pump of claim 24, wherein, The pumping mechanism comprises a gear pump, a driving gear of the gear pump being in transmission connection with the second shaft.

26. The motor pump of claim 24, wherein, The driving gear of the pumping mechanism is sleeved on the second shaft and is in position-limiting cooperation with the second shaft in the circumferential direction of the second shaft.

27. The motor pump of claim 24, wherein, The sun gear is in interference connection with the first shaft of the driving mechanism.

28. The motor pump of claim 1, wherein, The motor pump further comprises a filtering structure arranged in a lubricating cavity of the motor pump to filter metal particles in the lubricating cavity of the motor pump.

29. The motor pump of claim 28, wherein, The filtering structure is arranged in at least one of the variable speed mechanism, the driving mechanism and the pumping mechanism.

30. The motor pump of claim 28, wherein, The filtering structure comprises a magnetic oil filtering structure.

31. The motor pump of claim 28, wherein, The second housing of the variable speed mechanism is provided with a mounting hole, and the filtering structure is mounted in the mounting hole.

32. The motor pump of claim 1, wherein, The first housing of the driving mechanism is provided with a second fixing member for connecting with an external device; and / or, The third housing of the pumping mechanism is provided with a third fixing member for connecting with an external device.

33. The motor pump of claim 1, wherein, The driving mechanism comprises a first housing, and the variable speed mechanism comprises a second housing, the second housing being connected with the first housing and being used for supporting the first shaft of the driving mechanism.

34. A drive assembly characterized by, The motor pump of any one of claims 1 to 33.

35. An active suspension system characterized by, The motor pump of any one of claims 1 to 33, or the driving assembly of claim 34.

36. A vehicle characterized by The motor pump of any one of claims 1 to 33, or the driving assembly of claim 34, or the active suspension system of claim 35.

Images