Electric-motor pump assembly, suspension system, chassis system, and vehicle

Abstract

An electric-motor pump assembly, a suspension system, a chassis system, and a vehicle. The electric-motor pump assembly comprises an electric control unit, a first electric-motor pump, a second electric-motor pump, two heat dissipation units and flow-dividing members. The electric control unit is configured to control the first electric-motor pump and the second electric-motor pump. The two heat dissipation units are respectively provided between the two electric-motor pumps and the electric control unit. Each flow-dividing member at least has a first end and a second end, the first end being configured to guide a cooling medium that flows to one heat dissipation unit, and the second end being configured to guide a cooling medium that flows to the other heat dissipation unit.

Description

Motor pump assemblies, suspension systems, chassis systems and vehicles

[0001] This application claims priority to Chinese patent application number 202322931723.0, filed on October 30, 2023, entitled “Motor Pump Assembly, Suspension System, Chassis System and Vehicle,” the entire contents of which are incorporated herein by reference. Technical Field

[0002] The present application relates to the technical field of vehicle manufacturing, and in particular to a motor pump assembly, a suspension system, a chassis system and a vehicle. Background Art

[0003] In the prior art, dual-motor pumps typically dissipate heat by installing a heat sink structure on one side of the housing. Cooling medium flows sequentially through each motor and its corresponding IGBT, achieving cooling and dissipation. However, this approach suffers from inconsistent cooling medium temperatures across the two motors' heat dissipation surfaces. The IGBT near the cooling medium outlet is not as effectively cooled as the IGBT near the cooling medium inlet, potentially leading to insufficient heat dissipation from one motor's IGBT.

[0004] Application Contents

[0005] In view of the above-mentioned defects or deficiencies in the prior art, it is desired to provide a motor pump assembly, a suspension system, a chassis system and a vehicle, which, through the provision of two heat dissipation units and a diverter, is conducive to ensuring that the flow rate and temperature of the cooling medium flowing through each motor are the same, that is, the heat dissipation effect of the electric power module IGBT of each motor is basically the same, and at the same time, the heat dissipation of the motor itself and the power module is taken into account.

[0006] In a first aspect, the present application provides a motor pump assembly, comprising:

[0007] Electronic control unit;

[0008] a first motor pump and a second motor pump, the electronic control unit being configured to control the first motor pump and the second motor pump;

[0009] two heat dissipation units, the two heat dissipation units being respectively arranged between the first motor pump and the electronic control unit, and between the second motor pump and the electronic control unit;

[0010] The diverter has at least a first end and a second end, the first end is used to guide the cooling medium of one of the heat dissipation units, and the second end is used to guide the cooling medium of the other heat dissipation unit.

[0011] As an optional solution, each heat dissipation unit includes a cooling cavity, and a cooling medium flows through the interior of the cooling cavity.

[0012] As an optional solution, at least one guide rib is provided inside the cooling cavity. Preferably, at least two guide ribs are provided inside the cooling cavity, and the at least two guide ribs are distributed at intervals.

[0013] As an optional solution, each heat dissipation unit further includes a cooling plate, which is respectively arranged between the electronic control unit and the two motor pumps. The cooling plate cover is arranged on the cooling cavity and fits the electronic control unit.

[0014] As an optional solution, each heat dissipation unit further includes a heat-conducting medium, which is arranged between the cooling plate and the electronic control unit and is used to conduct heat generated by the electronic control unit to the cooling plate.

[0015] As an optional solution, the electronic control unit includes a power module, and a heat-conducting boss is provided on the cooling plate. The heat-conducting boss is located in a region of the cooling plate opposite to the power module.

[0016] As an optional solution, the first motor pump and the second motor pump include a housing, in which the first motor and the second motor are arranged, each cooling plate is fixedly connected to the housing, and the cooling cavity is a cavity enclosed and defined between each cooling plate and the housing.

[0017] As an optional solution, a seal is provided at the connection between each cooling plate and the housing.

[0018] As an optional solution, each heat dissipation unit further includes a channel for circulation of a cooling medium, the channel being provided on the shell, one end of the channel being connected to the cooling cavity, and the other end of the channel being connected to the diverter.

[0019] As an optional solution, the first end of the first motor and the first end of the second motor are arranged opposite to each other, and the channel includes a blind hole and a through hole opened inside the shell, the blind holes extend from the first end of the first motor and the first end of the second motor along the axial direction of the shell, respectively, the first end of the diverter and the second end of the diverter are respectively located inside the blind hole, and the through hole connects the blind hole and the cooling chamber.

[0020] As an optional solution, the motor pump assembly includes at least two diverters, at least one of which is used to divert the cooling medium to each heat dissipation unit, and the remaining diverters are used to guide and discharge the cooling medium flowing through each heat dissipation unit.

[0021] As an optional solution, the motor pump assembly includes two flow dividers, which are respectively located on two sides of the housing and spaced apart in a direction perpendicular to the axial direction.

[0022] As an optional solution, the flow dividing member is arranged outside the housing and located in the middle position of the housing in the axial direction.

[0023] As an optional solution, at least two ribs are respectively provided on opposite axial sides of the shell, and the at least two ribs are distributed at intervals.

[0024] As an optional solution, the flow dividing member has a mirror-symmetrical structure, and the first motor pump and the second motor pump are symmetrical about a center line of the flow dividing member.

[0025] In a second aspect, the present application provides a suspension system comprising a first shock absorber, a second shock absorber, and the motor pump assembly of the first aspect, wherein the first motor pump is hydraulically connected to the first shock absorber, and the second motor pump is hydraulically connected to the second shock absorber.

[0026] In a third aspect, the present application provides a chassis system comprising the motor pump assembly of the first aspect or the suspension system of the second aspect.

[0027] In a fourth aspect, the present application provides a vehicle comprising the motor pump assembly of the first aspect, or the suspension system of the second aspect, or the chassis system of the third aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Other features, objects and advantages of the present application will become more apparent upon reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0029] FIG1 is a cross-sectional schematic diagram of a motor pump assembly according to a specific embodiment of the present application;

[0030] FIG2 is an exploded schematic diagram of the structure of a motor pump assembly according to a specific embodiment of the present application;

[0031] FIG3 is a schematic exploded view of the structure of a motor pump assembly according to a specific embodiment of the present application;

[0032] FIG4 is a cross-sectional view of the AA plane in FIG3;

[0033] FIG5 is a schematic structural diagram of a flow divider in a motor pump assembly according to a specific embodiment of the present application;

[0034] FIG6 is a schematic structural diagram of a flow divider in a motor pump assembly according to another specific embodiment of the present application; and

[0035] FIG7 is a schematic structural diagram of a suspension system according to a specific embodiment of the present application.

[0036] In the figure, 100, motor pump assembly; 10, electronic control unit, 11, power module; 20, first motor pump, 21, housing, 211, channel, 22, first motor, 221, first stator assembly, 222, first rotor assembly, 23, first hydraulic pump; 30, second motor pump, 31, second motor, 311, second stator assembly, 312, second rotor assembly, 32, second hydraulic pump; 40, heat dissipation unit, 41, cooling Cavity, 42, guide rib, 43, cooling plate, 431, heat-conducting boss, 44, heat-conducting medium, 50, diverter, 51, first end, 52, second end, 53, third end; 60, sealing element; 70, blind hole, 71, through hole, 80, rib; 200, suspension system, 201, first shock absorber, 202, second shock absorber, 203, first hydraulic pipeline, 204, second hydraulic pipeline, 205, axle, 206, wheel. DETAILED DESCRIPTION

[0037] The present application will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present application and are not intended to limit the present application. It should also be noted that, for ease of description, only portions relevant to the present application are shown in the accompanying drawings.

[0038] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0039] 1 to 4 show a motor pump assembly 100 according to a preferred embodiment of the present application.

[0040] The motor pump assembly 100 includes an electronic control unit 10 , a first motor pump 20 , a second motor pump 30 , two heat dissipation units 40 and a flow diverter 50 .

[0041] The first motor pump 20 and the second motor pump 30 are electrically connected to the electronic control unit 10 and are controlled by the electronic control unit 10 .

[0042] One heat dissipation unit 40 is disposed at a position where the first motor pump 20 contacts the electronic control unit 10 , and another heat dissipation unit 40 is disposed at a position where the second motor pump 30 contacts the electronic control unit 10 . The two heat dissipation units 40 have the same structure.

[0043] The diverter 50 has at least a first end 51 and a second end 52 . The first end 51 is used to guide the cooling medium of one of the heat dissipation units 40 , and the second end 52 is used to guide the cooling medium flowing to or out of another heat dissipation unit 40 .

[0044] It should be noted that the electronic control unit 10 is used to control the operation of the first motor pump 20 and the second motor pump 30. Specifically, the first motor pump 20 and the second motor pump 30 can share an electronic control unit 10, and the first motor pump 20 and the second motor pump 30 can also each use an electronic control unit 10. The embodiments of the present application do not specifically limit this. The first motor pump 20 is electrically connected to the electronic control unit 10, and the second motor pump 30 is electrically connected to the electronic control unit 10, so that the electronic control unit 10 controls the first motor pump 20 and the second motor pump 30. Among them, the electronic control unit 10 includes a power module 11 (IGBT). The first end 51 and the second end 52 can be used to guide the cooling medium into the heat dissipation unit 40, or the first end 51 and the second end 52 can be used to guide the cooling medium out of the heat dissipation unit 40.

[0045] Optionally, as shown in Figures 1 and 2, the first motor pump 20 and the second motor pump 30 share a housing 21. A first motor 22 and a second motor 31 are installed inside the housing 21. The first end of the first motor 22 and the first end of the second motor 31 are arranged relative to each other. The second end of the first motor 22 is connected to the first hydraulic pump 23, and the first motor 22 is used to drive the first hydraulic pump 23. The second end of the second motor 31 is connected to the second hydraulic pump 32, and the second motor 31 is used to drive the second hydraulic pump 32. In order to facilitate the connection between the motor pump assembly 100 and the suspension system, the first motor 22 and the second motor 31 are symmetrically arranged about the center of the housing 21, and the first hydraulic pump 23 and the second hydraulic pump 32 are respectively located at the axial ends of the motor pump assembly 100 and are fixedly connected to the housing 21 by screws.

[0046] It is understandable that the first motor 22, the second motor 31, and the electronic control unit 10 generate heat during operation, and the heat of the electronic control unit 10 mainly comes from the power module 11. By providing two heat dissipation units 40 at the position where the first motor pump 20 and the second motor pump 30 contact the electronic control unit 10, it is beneficial to dissipate heat for the first motor 22, the second motor 31, and the electronic control unit 10 at the same time, ensuring their normal and reliable operation. Specifically, one heat dissipation unit is provided at the position where the area on the housing 21 where the first motor 22 is mounted contacts the electronic control unit 10, and the other heat dissipation unit 40 is provided at the position where the area on the housing 21 where the second motor 31 is mounted contacts the electronic control unit 10. By providing two heat dissipation units 40, the power modules 11 of the electronic control unit 10 can be dissipated separately and simultaneously, ensuring that each power module 11 in the electronic control unit 10 has a good heat dissipation effect, thereby ensuring reliable operation.

[0047] It can also be understood that the diverter 50 is mainly used to divert the cooling medium to the two heat dissipation units 40 respectively, to ensure that the flow rate and temperature of the cooling medium entering the two heat dissipation units 40 are consistent, and thus to ensure that the two heat dissipation units 40 have basically the same heat dissipation effect on the electronic control unit 10, the first motor 22 and the second motor 31. Among them, the diverter 50 can be one, two or more. When there is one diverter 50, the cooling medium enters the two heat dissipation units 40 from the first end 51 and the second end 52 of the diverter 50 respectively, and the cooling medium is discharged from any outlet on the opposite side of the diverter 50 on the housing 21, realizing the circulation of the cooling medium. When there are two or more diverters 50, the cooling medium can flow into the heat dissipation unit 40 from a part of the diverter 50 and be discharged from the remaining part of the diverter 50. The embodiments of the present application do not make specific restrictions on this. Among them, the cooling medium can be, but is not limited to, other cooling media such as cooling water or cooling oil.

[0048] Optionally, as shown in Figure 5, the flow divider 50 further includes a third end 53. This third end 53 serves as a confluence point and can be connected to external cooling medium or the cooling medium in the vehicle's thermal management system. The cooling medium is diverted through the first and second ends 51, 52 to the heat dissipation unit 40, and then flows out through the first and second ends 51, 52, respectively, and is recovered through the third end 53.

[0049] In actual use, the flow dividing piece 50 may be, but is not limited to, a tee.

[0050] The motor pump assembly 100 solves the problem in the prior art that the cooling effect of the IGBT 11 near the cooling medium outlet is not as good as that near the cooling medium inlet, resulting in insufficient heat dissipation of the IGBT 11 of one motor. The motor pump assembly 100 is provided with a diverter 50 and two heat dissipation units 40. The diverter 50 facilitates directing the cooling medium to the two heat dissipation units 40, thereby ensuring that the flow rate and temperature of the cooling medium entering the two heat dissipation units 40 are the same, thereby ensuring that the heat dissipation effect of the first motor pump 20 and the second motor pump 30 is substantially consistent. In addition, one heat dissipation unit 40 is arranged between the first motor pump 20 and the electronic control unit 10, and the other heat dissipation unit 40 is arranged between the second motor pump 30 and the electronic control unit 10. This facilitates simultaneous heat dissipation of the motors (the first motor 22 and the second motor 31) and the electronic control unit 10 (particularly the power module 11), ensuring consistent heat dissipation of the power module 11 and the motors, thereby facilitating the normal operation of the motor pump assembly 100. In addition, the motor pump assembly of the present application has a compact structure and is easy to manufacture.

[0051] As an achievable embodiment, as shown in Figures 2-4, each heat dissipation unit 40 includes a cooling cavity 41, which contains a cooling medium. The cooling cavity 41 in this embodiment facilitates the storage of the cooling medium, ensuring that the cooling medium flows within the cooling cavity 41 and remains there for a certain period of time, thereby reliably dissipating heat from the first motor 22, the second motor 31, and the electronic control unit 10.

[0052] Optionally, at least one guide rib 42 is provided inside the cooling cavity 41 . The guide rib 42 in this embodiment can make the cooling medium flow evenly in the cooling cavity 41 .

[0053] Optionally, at least two guide ribs 42 are provided inside the cooling cavity 41 , and the at least two guide ribs 42 are distributed at intervals.

[0054] The at least two guide ribs 42 can be evenly spaced, or they can be randomly spaced. Furthermore, the guide ribs 42 can be arranged parallel to the same side of the cooling cavity 41, or they can be staggered on opposite sides of the cooling cavity 41. This is not specifically limited in the embodiments of the present application. The provision of the guide ribs 42 further ensures uniform flow of the cooling medium and improves the cooling effect.

[0055] As an implementable method, each heat dissipation unit 40 further includes a cooling plate 43. The cooling plate 43 is disposed between the electronic control unit 10 and the first motor pump 20, and is also disposed between the electronic control unit 10 and the second motor pump 30. The cooling plate 43 is disposed over the cooling cavity 41 and is in contact with the electronic control unit 10.

[0056] It can be understood that the cooling plate 43 is arranged in the area where the shell 21 contacts the electronic control unit 10. The cooling plate 43 fits the electronic control unit 10, which is conducive to transferring the heat generated by the electronic control unit 10 to the cooling cavity 41, thereby improving the heat dissipation effect of the electronic control unit 10.

[0057] The cooling plate 43 may be made of a material with good thermal conductivity, such as metal aluminum.

[0058] Optionally, each heat dissipation unit 40 further includes a heat conducting medium 44, which is disposed between the cooling plate 43 and the electronic control unit 10 and is used to conduct heat generated by the electronic control unit 10 to the cooling plate 43. The use of the heat conducting medium 44 helps to further improve the heat conduction effect of the cooling plate 43, and helps to reliably transfer the heat generated by the electronic control unit 10 to the cooling plate 43, and then to the cooling cavity 41. The flow of the cooling medium 44 removes the heat, thereby achieving good heat dissipation of the electronic control unit 10.

[0059] The heat conducting medium 44 is made of a material with a high thermal conductivity. The heat conducting medium 44 can be directly applied to the cooling plate 43 or the electronic control unit 10, or can be formed into a sheet, plate, or other shaped structure and directly installed between the cooling plate 43 and the electronic control unit 10. The embodiments of the present application are not limited to this.

[0060] Optionally, the electronic control unit 10 includes a power module 11 , and a heat-conducting boss 431 is provided on the cooling plate 43 . The heat-conducting boss 431 is located in a region of the cooling plate 43 opposite to the power module 11 .

[0061] The number of heat-conducting bosses 431 can be one, two, or more. The number and position of the heat-conducting bosses 431 are determined by the number and position of the power modules 11 of the electronic control unit 10. The heat-conducting bosses 431 facilitate transfer of heat generated by the power modules 11 of the electronic control unit 10 to the cooling cavity 41, thereby ensuring effective heat dissipation for the power modules 11.

[0062] Optionally, the first motor pump 20 and the second motor pump 30 include a housing 21, in which a first motor 22 and a second motor 31 are disposed. Each cooling plate 43 is fixedly connected to the housing 21, and the cavity enclosed and defined between each cooling plate 43 and the housing 21 is a cooling cavity 41. It is understood that the cooling plates 43 are respectively mounted on the housing 21 at positions corresponding to the first motor 22 and the second motor 31. This arrangement facilitates simultaneous heat dissipation for the first motor 22, the second motor 31, and the electronic control unit 10, and ensures that the heat dissipation effect of the power module 11 corresponding to the first motor 22 and the power module 11 corresponding to the second motor 31 is consistent, thereby facilitating the normal operation of the motor pump assembly 100.

[0063] Optionally, a seal 60 is provided at the connection between each cooling plate 43 and the housing 21. This embodiment helps to ensure the sealing of the cooling cavity 41, and prevents the cooling medium from leaking out and affecting the normal operation of the entire motor pump assembly 100.

[0064] Optionally, each heat dissipation unit 40 further includes a channel 211 for circulating a cooling medium. The channel 211 is provided on the housing 21 . One end of the channel 211 is connected to the cooling cavity 41 , and the other end of the channel 211 is connected to the diverter 50 .

[0065] The channel 211 may be a hole opened inside the shell 21 , or may be a pipeline provided on the shell 21 , which is not limited in the embodiments of the present application.

[0066] The channel 211 facilitates guiding the cooling medium into the cooling cavity 41 , thereby ensuring reliable heat dissipation for the first motor 22 , the second motor 31 and the electronic control unit 10 .

[0067] Optionally, the first end of the first motor 22 and the first end of the second motor 31 are disposed opposite each other. The channel 211 includes a blind hole 70 and a through hole 71 formed within the housing 21. Two blind holes 70 are formed in the housing 21: one blind hole 70 extends axially from the first end of the first motor 22, and the other blind hole 70 extends axially from the first end of the second motor 31. The first end 51 and the second end 52 of the diverter 50 are each located within the blind hole 70, and the through hole 71 connects the blind hole 70 to the cooling chamber 41.

[0068] Optionally, the two blind holes 70 are respectively located at positions on the housing 21 where the first motor 22 and the second motor 31 are installed. The first end 51 of the diverter 50 and the second end 52 of the diverter 50 are respectively located inside the two blind holes 70, and the cooling medium can flow between the inside of the diverter 50 and the inside of the cooling chamber 41 through the blind holes 70 and the through holes 71. Specifically, the cooling medium can be transported from the first end 51 and the second end 52 of the diverter 50 to the cooling chamber 41 through the blind holes 70 and the through holes 71. The cooling medium can also be discharged from the cooling chamber 41 to the first end 51 and the second end 52 of the diverter 50 through the blind holes 70 and the through holes 71. The provision of the blind holes 70 and the through holes 71 is conducive to avoiding the use of additional pipelines, and the structure is simple, so that the structure of the entire motor pump assembly 100 is compact, and at the same time, the cooling medium can be diverted to the cooling chamber 41 to achieve reliable heat dissipation.

[0069] Optionally, the motor pump assembly 100 includes at least two diverters 50. At least one diverter 50 is used to divert the cooling medium to each heat dissipation unit 40, and the remaining diverters 50 are used to guide and discharge the cooling medium flowing through each heat dissipation unit 40.

[0070] The motor pump assembly 100 includes at least two flow diverters 50 , which helps to ensure that the flow rate and temperature of the cooling medium entering the two heat dissipation units 40 are the same, thereby improving the heat dissipation effect.

[0071] At least two diverter members 50 are spaced apart and arranged on the housing 21. The diverter member 50 can be arranged inside the housing 21. Specifically, the first end 51 and the second end 52 of the diverter member 50 are located inside the housing 21, and the third end 53 of the diverter member is at least partially located inside the housing 21. The third end 53 is used to connect the external cooling medium, allowing the cooling medium to flow into the heat dissipation unit 40, or to allow the cooling medium inside the heat dissipation unit 40 to be discharged. Of course, the diverter member can also be arranged outside the housing 21, and the embodiments of the present application are not specifically limited to this.

[0072] Optionally, the motor pump assembly 100 includes two flow diverters 50, each located on axially opposite sides of the housing 21. The two flow diverters 50 located on axially opposite sides of the housing help ensure that the cooling medium reliably enters the cooling cavity 41 and prolongs the residence time of the cooling medium in the cooling cavity 41, ensuring that the cooling medium has a maximum flow path, thereby improving heat dissipation. Furthermore, the motor pump assembly 100 has a compact structure.

[0073] Optionally, as shown in FIG6 , the flow dividing member 50 is disposed outside the housing 21 and located at the center of the housing 21 along the axial direction.

[0074] Specifically, two diverter members 50 are located on opposite sides of the housing 21. The first end 51 and the second end 52 of the diverter member 50 are connected to the cooling cavity 41 through a pipeline, and the third end 53 of the diverter member 50 is located outside the housing 21 for connecting to the external cooling medium.

[0075] The diverter 50 is arranged on the outside of the shell 21 and is located in the center of the shell 21, which is conducive to ensuring that the flow rate and temperature of the cooling medium flowing through the first motor 22 and the second motor 31 are the same, and there is no need to open a blind hole 70 inside the shell 21, saving space inside the shell 21 and facilitating the arrangement of other components. At the same time, reducing the number of openings corresponds to reducing the sealing process.

[0076] Optionally, the flow divider 50 has a mirror-symmetrical structure, and the first motor pump 20 and the second motor pump 30 are symmetrical about the center line of the flow divider 50. This arrangement facilitates evenly distributing the introduced cooling medium to the two heat dissipation units 40 and has the effect of converging the cooling medium of the two heat dissipation units 40.

[0077] Optionally, the housing 21 is provided with at least two ribs 80 along the axial direction, and the at least two ribs 80 are spaced apart. The ribs 80 of this embodiment can improve the heat dissipation effect of the surface of the first motor 22 and the second motor 31, while also strengthening the strength of the housing 21.

[0078] In summary, the motor pump assembly 100 of an optional embodiment of the present application is provided with two heat dissipation units 40 and a diverter 50. The diverter 50 is conducive to guiding the cooling medium to the two heat dissipation units 40 respectively, which is conducive to ensuring that the flow rate and temperature of the cooling medium entering the two heat dissipation units 40 are the same, thereby ensuring that the heat dissipation effect of the first motor pump 20 and the second motor pump 30 is basically the same. In addition, one heat dissipation unit 40 is arranged between the first motor pump 20 and the electronic control unit 10, and the other heat dissipation unit 40 is arranged between the second motor pump 30 and the electronic control unit 10, which is conducive to simultaneously dissipating heat for the motor (the first motor 22 and the second motor 31) and the electronic control unit 10 (especially the power module 11), ensuring that the heat dissipation effect of the power module 11 and the motor is consistent, thereby facilitating the normal operation of the motor pump assembly 100. In addition, the motor pump assembly 100 of the present application has a compact structure and is easy to produce and manufacture.

[0079] In addition, by arranging two diverter pieces 50 on opposite axial sides of the shell 21 inside the shell 21, on the one hand, it is beneficial to ensure that the cooling medium can reliably enter the cooling chamber 41, and it is beneficial to extend the residence time of the cooling medium in the cooling chamber 41, ensuring that the cooling medium has the largest flow path, thereby improving the heat dissipation effect; on the other hand, it makes the structure of the entire motor pump assembly 100 compact.

[0080] The present application is described in detail below through an example.

[0081] As shown in Figures 1-5, the first motor pump 20 is composed of a first motor 22 and a first hydraulic pump 23. The first motor 22 includes a first stator assembly 221 and a second rotor assembly 222. The second motor pump 30 is composed of a second motor 31 and a second hydraulic pump 32. The second motor 31 includes a second stator assembly 311 and a second rotor assembly 312.

[0082] A first motor 22 and a second motor 31 are mounted within the housing 21. The first motor 22 has a first end and a second end in the axial direction, while the second motor 31 has a first end and a second end in the axial direction. The first end of the first motor 22 and the first end of the second motor 31 are positioned opposite each other. The first hydraulic pump 23 is located at the second end of the first motor 22, while the second hydraulic pump 32 is located at the second end of the second motor 31.

[0083] The electronic control unit 10 is located at the upper part of the housing 21, and the first motor pump 20 and the second motor pump 30 share the same electronic control unit 10. Two diverter pieces 50 are provided on both sides of the axial direction inside the housing 21, and the diverter pieces 50 are sealed at the connection with the housing 21. Two cooling plates 42 are provided in the area where the housing 21 contacts the electronic control unit 10. The cooling plates 42 are sealed to the housing 21 and define two cooling cavities 41 with the housing 21. The two cooling cavities 41 correspond to the areas located in the first motor 22 and the second motor 31, respectively. Blind holes 70 are provided in the housing 21, extending from the first end of the first motor 22 and the first end of the second motor 31 along the axial direction of the housing 21. A through hole 71 is provided in the housing 21 at the bottom of the cooling cavity 41. The through hole 71 is connected to the blind hole 70, so that one cooling cavity 41 is connected to the first end 51 of the diverter piece 50, and the other cooling cavity 41 is connected to the second end 52 of the diverter piece 50. The cooling plate 43 is attached to the electronic control unit 10 , a heat conducting medium 44 is coated on the cooling plate 43 , and a heat conducting boss 431 is provided on the cooling plate 43 in an area corresponding to the power module 11 of the electronic control unit 10 .

[0084] In actual operation, the cooling medium is introduced through the third end 53 of the diverter 50 on one side, and is diverted through the first end 51 and the second end 52 to the cooling chamber 41 corresponding to the first motor pump 20 and the cooling chamber 41 of the second motor pump 30. Due to the action of the guide ribs 42, the cooling medium flows evenly in the cooling chamber 41, taking away the heat generated by the first motor 22 and the second motor 31. In addition, the heat generated by the electronic control unit 10 is transferred to the cooling medium through the heat-conducting medium 44, the heat-conducting boss 431 and the cooling plate 43. The cooling medium passes through the first end 51 and the second end 52 of the diverter 50 on the other side, respectively, and converges to the third end 53 for discharge, taking away the heat and realizing reliable heat dissipation of the motor pump assembly 100.

[0085] In the second aspect, the present application provides a suspension system 200. As shown in FIG7 , the suspension system 200 includes a first shock absorber 201, a second shock absorber 202, and the motor pump assembly 100 of the first aspect. The first motor pump 20 is hydraulically connected to the first shock absorber 201, and the second motor pump 30 is hydraulically connected to the second shock absorber 202. Thus, the suspension system 200 has all the features and advantages of the motor pump assembly 100 described above, which will not be repeated here. In general, the suspension system has good heat dissipation effect and can ensure continuous and reliable operation.

[0086] As shown in Figure 7, the first motor pump 20 consists of a first motor 22 and a first hydraulic pump 23. The first motor 22 includes a first stator assembly 221 and a first rotor assembly 222. The second motor pump 30 consists of a second motor 31 and a second hydraulic pump 32. The second motor 31 includes a second stator assembly 311 and a second rotor assembly 312. Two first hydraulic lines 203 exiting the first hydraulic pump 23 are connected to the two hydraulic chambers of the first shock absorber 201. Two second hydraulic lines 204 exiting the second hydraulic pump 32 are connected to the two hydraulic chambers of the second shock absorber 202. The first shock absorber 201 and the second shock absorber 202 are connected to the wheels 206 via axles 205. The dual motor pumps adjust the pressure differential between the upper and lower hydraulic chambers to achieve axial movement of the pistons in the first and second shock absorbers, thereby achieving active adjustment of the vehicle's suspension height.

[0087] [Corrected 25.11.2024 in accordance with Rule 91] Thirdly, this application provides a chassis system. The chassis system includes the motor pump assembly 100 of the first aspect or the suspension system 200 of the second aspect. It will be appreciated that this chassis system possesses all the features and advantages of the motor pump assembly 100 or suspension system 200 described above, and will not be further elaborated here. Overall, this chassis system provides excellent heat dissipation, ensuring continuous and reliable operation, and reliably ensuring smooth vehicle travel.

[0088] [Corrected 25.11.2024 in accordance with Rule 91] In a fourth aspect, the present application provides a vehicle. The vehicle includes the motor pump assembly 100 of the first aspect, or the suspension system 200 of the second aspect, or the chassis system of the third aspect. For example, the vehicle may be an electric vehicle, a hybrid vehicle, or a gasoline vehicle. Thus, the vehicle possesses all the features and advantages of the motor pump assembly 100, suspension system 200, or chassis system described above, and will not be further elaborated here. Overall, the vehicle provides a smooth, safe, and pleasant ride.

[0089] It should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like used above to indicate orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only used to facilitate the description of this application and simplify the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of this application, unless otherwise specified, "multiple" means two or more.

[0090] The above description is merely a preferred embodiment of the present application and an illustration of the technical principles employed. Those skilled in the art should understand that the scope of the present application is not limited to the technical solutions formed by the specific combination of the above-mentioned technical features, but also encompasses other technical solutions formed by any combination of the above-mentioned technical features or their equivalents without departing from the concept of the present application. For example, a technical solution formed by replacing the above-mentioned features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A motor pump assembly (100), characterized in that: The motor pump assembly (100) comprises: Electronic control unit (10); A first motor pump (20) and a second motor pump (30), wherein the electronic control unit (10) is configured to control the first motor pump (20) and the second motor pump (30); two heat dissipation units (40), the two heat dissipation units (40) being respectively arranged between the first motor pump (20) and the electronic control unit (10), and between the second motor pump (30) and the electronic control unit (10); A flow divider (50), the flow divider (50) having at least a first end (51) and a second end (52), the first end (51) being used for guiding the cooling medium of one of the heat dissipation units (40), and the second end (52) being used for guiding the cooling medium of another of the heat dissipation units (40).

2. The motor pump assembly (100) according to claim 1, characterized in that Each of the heat dissipation units (40) comprises a cooling cavity (41), and the interior of the cooling cavity (41) is used for the circulation of the cooling medium.

3. The motor pump assembly (100) according to claim 2, characterized in that: At least one guide rib (42) is arranged inside the cooling cavity (41). Preferably, at least two guide ribs (42) are arranged inside the cooling cavity (41), and the at least two guide ribs (42) are distributed at intervals.

4. The motor pump assembly (100) according to claim 2 or 3, characterized in that: Each of the heat dissipation units (40) further comprises a cooling plate (43), wherein the cooling plate (43) is covered on the cooling cavity (41) and is in close contact with the electronic control unit (10).

5. The motor pump assembly (100) according to claim 4, characterized in that: The electric control unit (10) comprises a power module (11), and a heat-conducting boss (431) is provided on the cooling plate (43), wherein the heat-conducting boss (431) is located in a region of the cooling plate (43) opposite to the power module (11).

6. The motor pump assembly (100) according to claim 4 or 5, characterized in that: The first motor pump (20) and the second motor pump (30) comprise a housing (21), wherein a first motor (22) and a second motor (31) are arranged in the housing (21), each cooling plate (43) is fixedly connected to the housing (21), and the cooling cavity (41) is a cavity enclosed and defined between each cooling plate (43) and the housing (21).

7. The motor pump assembly (100) according to claim 6, characterized in that A sealing member (60) is provided at the connection between each cooling plate (43) and the shell (21).

8. The motor pump assembly (100) according to claim 6 or 7, characterized in that: Each of the heat dissipation units (40) further comprises a channel (211) for the circulation of the cooling medium, wherein the channel (211) is arranged on the shell (21), one end of the channel (211) is connected to the cooling cavity (41), and the other end of the channel (211) is connected to the diverter (50).

9. The motor pump assembly (100) according to claim 8, characterized in that The first end of the first motor (22) and the first end of the second motor (31) are arranged opposite to each other, and the channel (211) comprises a blind hole (70) and a through hole (71) which are opened inside the housing (21), the blind hole (70) respectively extending from the first end of the first motor (22) and the first end of the second motor (31) along the axial direction of the housing (21), the first end of the diverter (50) and the second end of the diverter (50) are respectively located inside the blind hole (70), and the through hole (71) connects the blind hole (70) and the cooling chamber (41).

10. The motor pump assembly (100) according to any one of claims 7 to 9, characterized in that: The motor pump assembly (100) comprises at least two diverter pieces (50), at least one of the diverter pieces (50) is used to divert the cooling medium to each of the heat dissipation units (40), and the remaining diverter pieces (50) are used to guide and discharge the cooling medium flowing through each of the heat dissipation units (40).

11. The motor pump assembly (100) according to claim 10, characterized in that The motor pump assembly (100) comprises two flow dividers (50), and the two flow dividers (50) are respectively located on two sides of the housing (21) that are spaced apart in a direction perpendicular to the axial direction.

12. The motor pump assembly (100) according to any one of claims 7 to 11, characterized in that: The flow dividing member (50) is arranged outside the housing (21) and is located at a middle position of the housing (21) in the axial direction.

13. The motor pump assembly (100) according to any one of claims 7 to 12, characterized in that: At least two convex ribs (80) are respectively arranged on opposite sides of the shell (21) along the axial direction, and the at least two convex ribs (80) are distributed at intervals.

14. The motor pump assembly (100) according to any one of claims 1 to 13, characterized in that: The flow dividing member (50) has a mirror-symmetrical structure, and the first motor pump (20) and the second motor pump (30) are symmetrical about a center line of the flow dividing member (50).

15. A suspension system (200), characterized in that: The suspension system (200) comprises a first shock absorber (201), a second shock absorber (202) and a motor pump assembly (100) according to any one of claims 1 to 14, wherein the first motor pump (20) is hydraulically connected to the first shock absorber (201), and the second motor pump (30) is hydraulically connected to the second shock absorber (202).

16. A chassis system, characterized in that: The chassis system comprises the motor pump assembly (100) according to any one of claims 1 to 14 or the suspension system (200) according to claim 15.

17. A vehicle, characterized in that: The vehicle comprises the motor pump assembly (100) according to any one of claims 1 to 14, or the suspension system (200) according to claim 15, or the chassis system according to claim 16.

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