Motor pump assembly, suspension system, chassis assembly, and vehicle

Abstract

A motor pump assembly, a suspension system, a chassis assembly, and a vehicle, the motor pump assembly comprising a housing, a motor pump, and a cooling structure, the housing being provided with an accommodating cavity; at least part of the motor pump is arranged in the accommodating cavity; the cooling structure is provided with a cooling channel; the housing is provided with an inlet and an outlet, and the cooling channel is in communication with the inlet and the outlet, such that an external liquid cooling medium flows through the cooling channel to cool the motor pump.

Description

Electric pump assembly, suspension system, chassis assembly and vehicle

[0001] This application claims priority to Chinese Patent Application No. 202421671015.6, filed on July 12, 2024, entitled "Electric Pump Assembly, Suspension System, Chassis Assembly and Vehicle", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of vehicle technology, and more particularly to an electric motor pump assembly, a suspension system, a chassis assembly, and a vehicle. Background Technology

[0003] The motor pump assembly of a pure electric vehicle is usually configured to be controlled by a motor controller. The core components of the motor controller include high-power electronic components such as IGBTs. During operation, IGBT power devices generate a lot of heat, which leads to an increase in IGBT temperature and thus creates more safety hazards.

[0004] In related technologies, motor pumps use air cooling for heat dissipation. However, the cooling system has poor heat dissipation capacity and cannot effectively dissipate heat from the motor pump, thus affecting its performance. Summary of the Invention

[0005] This application provides an electric motor pump assembly, a suspension system, a chassis assembly, and a vehicle, which uses liquid cooling to dissipate heat from the electric motor pump, thereby at least partially solving the aforementioned technical problems.

[0006] To achieve the above objectives, according to a first aspect of this application, a motor pump assembly is provided, comprising: a housing having a receiving cavity;

[0007] An electric pump, at least a portion of which is disposed within the receiving cavity;

[0008] A cooling structure, wherein the cooling structure is provided with cooling channels;

[0009] The housing is provided with an inlet and an outlet, and the cooling channel connects the inlet and the outlet so that external liquid cooling medium flows through the cooling channel to cool the motor pump.

[0010] In some embodiments, the cooling structure includes a cooling cavity disposed inside the housing, wherein an external liquid cooling medium flows into the cooling cavity through the inlet and a circulating medium flows out of the cooling cavity through the outlet; the cooling structure further includes an inlet pipe and an outlet pipe disposed outside the housing, wherein one end of the inlet pipe is provided with an inlet port and one end of the outlet pipe is provided with an outlet port, the inlet pipe is connected to the inlet and the outlet pipe is connected to the outlet, wherein the external liquid cooling medium flows into the inlet pipe through the inlet port and the circulating medium flows into the outlet pipe through the outlet and flows out through the outlet port.

[0011] In some embodiments, a control module is further included, which is electrically connected to the motor pump and is located above the motor pump;

[0012] A cooling component, which, together with the housing, forms the cooling cavity;

[0013] A heat-conducting component is disposed between the cooling component and the control module, and the liquid cooling medium inside the cooling chamber is configured to simultaneously cool the motor pump and the control module.

[0014] In some embodiments, the electric pump includes a first electric pump and a second electric pump, which are coaxially arranged along the long axis of the housing.

[0015] The cooling chamber includes a first cooling chamber and a second cooling chamber. The first cooling chamber is configured to correspond to the first motor, and the second cooling chamber is configured to correspond to the second motor. The first cooling chamber is configured with a first inlet and a first outlet, and the second cooling chamber is configured with a second inlet and a second outlet.

[0016] The inlet pipe connects the first inlet and the second inlet, and the outlet pipe connects the second outlet and the first outlet; or, the inlet pipe connects the first inlet, the first outlet and the second inlet are connected, and the outlet pipe connects the second outlet.

[0017] In some embodiments, the inlet pipe includes an inlet tee pipe, which includes a main inlet pipe and two inlet branch pipes. The two inlet branch pipes are connected to one end of the main inlet pipe, and the other end of the main inlet pipe is configured as the inlet. One of the inlet branch pipes is connected to the first inlet, and the other inlet branch pipe is connected to the second inlet.

[0018] In some embodiments, the liquid outlet pipe includes a liquid outlet tee pipe, which includes a main liquid outlet pipe and two branch liquid outlet pipes. The two branch liquid outlet pipes are connected to one end of the main liquid outlet pipe, and the other end of the main liquid outlet pipe is configured as the liquid outlet. One of the branch liquid outlet pipes is connected to the first outlet, and the other branch liquid outlet pipe is connected to the second outlet.

[0019] In some embodiments, the cross-sectional areas of the inner bores of the two inlet branch pipes or the two outlet branch pipes are the same, the cross-sectional area of ​​the inner bore of the main inlet pipe or the main outlet pipe is set to a, and the cross-sectional area of ​​the inner bore of the inlet branch pipe or the outlet branch pipe is set to b, where 1 / 2*a≤b≤a.

[0020] In some embodiments, the inlet pipe includes an inlet connecting pipe that connects the inlet branch pipe and the second inlet; the outlet pipe includes an outlet connecting pipe that connects the first outlet and the outlet branch pipe, and the inlet connecting pipe and the outlet connecting pipe are disposed on the same side of the housing.

[0021] In some embodiments, the inlet tee and the outlet tee are located on opposite sides of the long axis of the housing.

[0022] In some embodiments, the inlet tee and the outlet tee are located on the central axis in the minor axis direction of the housing.

[0023] In some embodiments, the inlet pipe includes two inlet bends, which are respectively disposed on both sides of the long axis of the housing. One of the inlet bends is used to connect to one of the inlet branches and the first inlet, and the other inlet bend is used to connect to the other inlet branch and the second inlet.

[0024] In some embodiments, the liquid outlet pipe includes two liquid outlet bends, which are respectively disposed on both sides of the long axis of the housing. One of the liquid outlet bends is used to connect one of the liquid outlet branches and the first outlet, and the other liquid outlet bend is used to connect the other liquid outlet branch and the second outlet.

[0025] In some embodiments, a connecting pipe disposed outside the housing is also included, the connecting pipe connecting the first outlet and the second inlet.

[0026] In some embodiments, the system further includes a control module electrically connected to the first motor pump and the second motor pump; a first cooling element and a second cooling element, the first cooling element and the housing forming a first cooling cavity, and the second cooling element and the housing forming a second cooling cavity; a first heat-conducting element and a second heat-conducting element, the first heat-conducting element being disposed between the first cooling element and the control module, and the second heat-conducting element being disposed between the second cooling element and the control module.

[0027] In some embodiments, the first cooling member or the second cooling member includes a cooling plate and at least one heat dissipation protrusion disposed on the inner surface of the cooling plate, wherein at least one of the heat dissipation protrusions extends within the first cooling cavity or the second cooling cavity.

[0028] In some embodiments, at least one guide vane is provided in the first cooling cavity or the second cooling cavity.

[0029] In some embodiments, the cooling structure further includes a cooling channel disposed on the housing, the wall of which the cooling channel is located enclosing the receiving cavity, the cooling channel being provided with a third inlet and a third outlet, both of which are connected to the cooling cavity, the liquid cooling medium inside the cooling cavity flowing into the cooling channel through the third inlet to cool at least a portion of the motor pump, and the circulating medium flowing out through the third outlet.

[0030] In some embodiments, the cooling channel includes at least one annular channel; or the cooling channel includes at least two fan-shaped channels.

[0031] According to a second aspect of this application, a suspension system is provided, including a first shock absorber, a second shock absorber, and the aforementioned motor pump assembly, wherein the first motor pump is connected to the first shock absorber, and the second motor pump is connected to the second shock absorber.

[0032] According to a third aspect of this application, a chassis assembly is also provided, including the aforementioned motor pump assembly or the aforementioned suspension system.

[0033] According to a fourth aspect of this application, a vehicle is also provided, including the above-described motor pump assembly, the above-described suspension system, or the above-described chassis assembly.

[0034] In the motor pump assembly of this application embodiment, the motor pump is cooled by liquid cooling, thereby effectively improving the cooling efficiency of the cooling structure for the motor pump.

[0035] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0037] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0038] Figure 1 is a cross-sectional structural diagram of the motor pump assembly provided in an exemplary embodiment of this disclosure;

[0039] Figure 2 is a perspective view of the motor pump assembly provided in an exemplary embodiment of this disclosure;

[0040] Figure 3 is an exploded view of the motor pump assembly provided in an exemplary embodiment of this disclosure;

[0041] Figure 4 is a structural diagram of the tee pipe provided in an exemplary embodiment of this disclosure;

[0042] Figure 5 is a structural diagram of the bent pipe provided in an exemplary embodiment of this disclosure;

[0043] Figure 6 is a structural schematic diagram of an electric pump assembly provided in yet another exemplary embodiment of this disclosure;

[0044] Figure 7 is a perspective view of the cooling component provided in an exemplary embodiment of this disclosure;

[0045] Figure 8 is an exploded view of the motor pump assembly provided in another exemplary embodiment of this disclosure;

[0046] Figure 9 is a structural schematic diagram of a vehicle provided in an exemplary embodiment of this disclosure;

[0047] Explanation of reference numerals in the attached drawings: 10. Motor-pump assembly; 1. Housing; 110. Cooling chamber; 111. First cooling chamber; 112. Second cooling chamber; 121. First inlet; 122. First outlet; 123. Second inlet; 124. Second outlet; 13. Guide vane; 14. Receiving cavity; 21. First motor-pump; 211. First motor; 212. First hydraulic pump; 22. Second motor-pump; 221. Second motor; 222. Second hydraulic pump; 31. First cooling component; 32. Second cooling component; 33. Cooling plate; 34. Heat dissipation protrusion; 41. Liquid inlet pipe; 411. Liquid inlet branch pipe; 412. Liquid inlet tee pipe; 413. Liquid inlet bend pipe; 414. Liquid inlet connecting pipe. ; 415. Main inlet pipe; 416. First section; 417. Second section; 42. Outlet pipe; 421. Outlet branch pipe; 422. Outlet tee pipe; 423. Outlet bend; 424. Outlet connecting pipe; 425. Main outlet pipe; 43. Inlet; 44. Outlet; 45. Connecting pipe; 5. Control module; 51. Power device; 61. First heat conductor; 62. Second heat conductor; 7. Cooling channel; 71. Third inlet; 72. Third outlet; 73. Inflow channel; 74. Outflow channel; 100. Vehicle Detailed Implementation

[0048] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0049] In a first aspect, this application provides a suspension system, which includes a motor-pump assembly, a shock absorber, an axle, and a wheel. In some embodiments, the suspension system is configured as an active suspension system, which can actively adjust the damping and height of the suspension, wherein the power source for adjusting the height of the active suspension system is hydraulic energy provided by the motor-pump assembly.

[0050] The electric pump assembly includes a first electric pump and a second electric pump. Both the first and second electric pumps include an electric motor and a hydraulic pump, with the electric motor providing power and driving the hydraulic pump to move axially.

[0051] The shock absorber comprises two components, which are respectively connected to the first motor pump and the second motor pump. Each shock absorber is equipped with a hydraulic chamber and a piston, which divides the hydraulic chamber into upper and lower hydraulic chambers.

[0052] One end of each of the two hydraulic lines is connected to the hydraulic pump of either the first or second electric motor pump, and the other end of each hydraulic line is connected to the upper and lower hydraulic chambers of the shock absorber. The piston is connected to the first or second electric motor pump via the two hydraulic lines.

[0053] The vehicle's wheels are connected to the axle, which is further connected to the piston structure of two shock absorbers. By setting up two electric pumps, the pressure difference between the upper and lower hydraulic chambers is adjusted, thereby allowing the pistons in the shock absorbers to move along the height direction, thus achieving active adjustment of the vehicle's suspension height.

[0054] In pure electric vehicles, the motor pump assembly is usually configured to be controlled by the motor control module. The core components of the motor control module include high-power electronic components such as IGBTs (Insulated Gate Bipolar Transistors). During operation, IGBT power devices generate a lot of heat, which leads to an increase in IGBT temperature and thus creates more safety hazards.

[0055] Currently, electric motor pumps typically use air cooling to dissipate heat, which has poor heat dissipation capacity and cannot effectively cool the pumps, thus affecting their performance.

[0056] In response to the above problems, in a second aspect, embodiments of this application also provide a motor pump assembly 10, which includes a housing 1, a motor pump, and a cooling structure.

[0057] The housing 1 is provided with a receiving cavity in which at least a portion of the motor pump is housed. The housing 1 is also provided with an inlet and an outlet.

[0058] The electric pump consists of an electric motor and a hydraulic pump. The electric motor drives the hydraulic pump, which is connected to and acts on the shock absorber.

[0059] The cooling structure includes a cooling channel connecting the inlet and outlet of the housing 1, allowing external liquid cooling medium to flow through the channel to cool the motor pump. Liquid cooling provides better cooling performance than air cooling.

[0060] In some embodiments, as shown in Figures 1 and 2, the cooling structure includes a cooling cavity disposed inside the housing 1 and an inlet pipe 41 and an outlet pipe 42 disposed outside the housing 1.

[0061] The cooling chamber includes an inlet and an outlet. External liquid cooling medium enters the cooling chamber through the inlet to cool the motor pump part located inside the housing 1, and circulating medium flows out through the outlet.

[0062] The liquid inlet pipe 41 is connected to the inlet of the cooling chamber, and the liquid outlet pipe 42 is connected to the outlet of the cooling chamber. The liquid inlet pipe 41 is provided with only one liquid inlet 43, and the liquid outlet pipe 42 is provided with only one liquid outlet 44.

[0063] External liquid cooling medium flows into the inlet pipe 41 through the inlet port 43 and into the cooling chamber through the inlet to cool the motor pump. The circulating medium flows into the outlet pipe 42 through the outlet of the cooling chamber and out through the outlet port 44.

[0064] It should be noted that the motor pump in the related technology uses air cooling for heat dissipation, thus eliminating the need to connect the motor pump's cooling chamber to the vehicle's thermal management system. In the embodiments of this application, by connecting the motor pump's cooling chamber to an external inlet pipe 41 and outlet pipe 42, both of which are located outside the housing 1, it is advantageous to connect the inlet pipe 41 and outlet pipe 42 to the vehicle's thermal management system. Furthermore, the inlet pipe 41 has only one inlet port 43, and the outlet pipe 42 has only one outlet port 44, thereby facilitating the vehicle's thermal management system to manage and control the heat dissipation of the motor pump assembly.

[0065] In some embodiments, the electrode pump assembly 10 further includes a control module 5, a cooling element, and a heat-conducting element.

[0066] The control module 5 is electrically connected to the motor pump and is configured to control the operation of the motor pump. The control module 5 includes a power device 51, which includes an IGBT.

[0067] The cooling component is connected to one end of the housing 1 and together with the housing 1 forms a cooling cavity.

[0068] The heat-conducting component is located between the cooling component and the control module 5. The heat-conducting component is used to conduct the heat generated by the control module 5 to the cooling component, so that the cooling medium inside the cooling chamber can dissipate heat for both the motor pump and the control module 5 at the same time.

[0069] In some examples, the thermally conductive component is made of a thermally conductive material with good thermal conductivity. Suitable thermally conductive materials may be one or more of the following: thermally conductive silicone sheet, thermally conductive gel sheet, two-component thermally conductive gel, thermally conductive phase change material, or high thermal conductivity and high temperature resistant epoxy potting resin.

[0070] In some embodiments, the motor pump assembly 10 includes a housing 1, two motor pumps, two cooling components, two heat-conducting components, an inlet pipe 41, and an outlet pipe 42.

[0071] The two electric pumps include a first electric pump 21 and a second electric pump 22, which are arranged along the long axis of the housing 1 and are coaxially arranged.

[0072] The first motor pump 21 includes a first motor 211 and a first hydraulic pump 212, and the second motor pump 22 includes a second motor 221 and a second hydraulic pump 222. Both the first motor 211 and the second motor 221 are disposed in the housing 1. The first motor 211 has a first end and a second end disposed along the long axis of the housing 1, and the second motor 221 has a first end and a second end disposed along the long axis of the housing 1. The first end of the first motor 211 and the second end of the second motor 221 are respectively disposed on both sides of the long axis of the housing 1, and the second end of the first motor 211 and the first end of the second motor 221 are respectively disposed close to the central axis of the short axis of the housing 1.

[0073] The housing 1 is provided with two receiving cavities to respectively accommodate the first motor 211 and the second motor. The housing 1 is also provided with two cooling cavities, namely the first cooling cavity 111 and the second cooling cavity 112. The first cooling cavity 111 is provided corresponding to the first motor 211, and the second cooling cavity 112 is provided corresponding to the second motor 221.

[0074] The two cooling components include a first cooling component 31 and a second cooling component 32. The first cooling component 31 is connected to one end of the housing 1 and encloses the housing 1 to form a first cooling cavity 111. The first cooling cavity 111 is provided and configured to dissipate heat from the first motor 211. The second cooling component 32 is connected to one end of the housing 1 and encloses the housing 1 to form a second cooling cavity 112. The second cooling cavity 112 is provided and configured to dissipate heat from the second motor 221.

[0075] The first cooling chamber 111 is provided with a first inlet 121 and a first outlet 122, and the second cooling chamber 112 is provided with a second inlet 123 and a second outlet 124. Cooling medium enters the first cooling chamber 111 through the first inlet 121, and the circulating medium formed by sufficient heat exchange within the first cooling chamber 111 flows out through the first outlet 122. Cooling medium enters the second cooling chamber 112 through the second inlet 123, and the circulating medium formed by sufficient heat exchange within the second cooling chamber 112 flows out through the second outlet 124.

[0076] The two heat-conducting components include a first heat-conducting component 61 and a second heat-conducting component 62. The first heat-conducting component 61 is disposed between the first cooling component 31 and the control module 5, and the second heat-conducting component 62 is disposed between the second cooling component 32 and the control module 5. The first heat-conducting component 61 and the second heat-conducting component 62 are used to conduct the heat generated by the control module 5 to the first cooling component 31 and the second cooling component 32 respectively, so that the above cooling structure can simultaneously dissipate heat for the first motor 211, the second motor 221 and the control module 5, thereby improving the performance of the motor pump assembly 10.

[0077] The control module 5 is electrically connected to the first motor pump 21 and the second motor pump 22 and is configured to control the operation of the first motor pump 21 and the second motor pump 22. The first motor pump 21 and the second motor pump 22 can share one control module 5, or the first motor pump 21 and the second motor pump 22 can each use their own control module. The control module 5 includes a high-power device 51, which includes an IGBT.

[0078] In some examples, as shown in Figure 2, the first inlet 121, the first outlet 122, the second inlet 123, and the second outlet 124 are all configured as through holes extending along the height direction of the housing 1, which facilitates the flow of cooling medium.

[0079] Cooling medium flows into the first inlet 121 or the second inlet 123 through the inlet pipe 41. The circulating medium inside the first cooling chamber 111 flows into the outlet pipe 42 through the first outlet 122, or the circulating medium inside the second cooling chamber 112 flows into the outlet pipe 42 through the second outlet 124. The inlet pipe 41 can be directly and fixedly connected to the first inlet 121 or the second inlet 123, or it can be connected through multiple connecting pipes. Similarly, the outlet pipe 42 can be directly and fixedly connected to the first outlet 122 or the second outlet 124, or it can be connected through multiple connecting pipes.

[0080] Since the inlet pipe 41 and the outlet pipe 42 are located outside the housing 1, they can be further connected to the vehicle's thermal management system. The inlet pipe 41 has only one inlet port 43, and the outlet pipe 42 has only one outlet port 44. This simplifies the connection between the inlet pipe 41 and the outlet pipe 42 and the thermal management system, which is beneficial for the vehicle's thermal management system to control the heat dissipation performance of the motor pump assembly 10.

[0081] In some embodiments, continuing to refer to FIG2, the liquid inlet pipe 41 includes two liquid inlet branches 411, one of which is connected to the first inlet 121 of the first cooling chamber 111, and the other liquid inlet branch 411 is connected to the second inlet 123 of the second cooling chamber 112. Cooling medium flows into the liquid inlet pipe 41 through one liquid inlet 43, and flows into the first cooling chamber 111 and the second cooling chamber 112 respectively through the two liquid inlet branches 411, thereby ensuring that the temperature of the cooling medium flowing into the first inlet 121 and the second inlet 123 is the same.

[0082] In some embodiments, continuing to refer to FIG2, the liquid outlet pipe 42 includes two liquid outlet branches, one of which, 421, is connected to the first outlet 122 of the first cooling chamber 111, and the other, 421, is connected to the second outlet 124 of the second cooling chamber 112. The circulating medium flowing out of the first cooling chamber 111 and the circulating medium flowing out of the second cooling chamber 112 both flow into the same liquid outlet pipe 42, thereby enabling the first cooling chamber 111 and the second cooling chamber 112 to have substantially the same cooling effect.

[0083] In some embodiments, continuing to refer to Figures 2 and 3, the inlet pipe 41 includes an inlet tee pipe 412, an inlet bend pipe 413, and an inlet connecting pipe 414.

[0084] The structure of the liquid inlet tee 412 is shown in Figure 4. The liquid inlet tee 412 includes a main liquid inlet 415 and two branch liquid inlet pipes 411. One end of the main liquid inlet 415 is set as a liquid inlet 43, and the other end of the main liquid inlet 415 is connected to the two branch liquid inlet pipes 411. The end of one of the branch liquid inlet pipes 411 is connected to a liquid inlet bend 413, which is fixedly connected to the first inlet 121. The end of the other branch liquid inlet pipe 411 is connected to a liquid inlet connecting pipe 414, and the end of the liquid inlet connecting pipe 414 is connected to the second inlet 123 through another liquid inlet bend 413. The two inlet branch pipes 411 have the same cross-sectional area, which is set as b. The cross-sectional area of ​​the inner bore of the main inlet pipe 415 is set as a, where 1 / 2*a≤b≤a. This ensures that the sum of the cross-sectional areas of the inner bores of the two inlet branch pipes 411 is greater than the cross-sectional area of ​​the inner bore of the main inlet pipe 415, thereby increasing the flow rate of the cooling medium entering the two inlet branch pipes 411. The main inlet pipe 415 is designed for easy disassembly and assembly, facilitating its connection to the vehicle's thermal management system. A sealing rib is provided at the connection between the inlet branch pipe 411 and the inlet connecting pipe 414, which helps to form a sealed connection between the inlet branch pipe 411 and the inlet connecting pipe 414.

[0085] The liquid inlet connection pipe 414 extends from one side of the housing 1 to the other side of the housing 1. The liquid inlet connection pipe 414 is used to connect the liquid inlet branch pipe 411 and the second inlet 123, so that the cooling medium flows in from the same liquid inlet 43 and is respectively supplied to the first cooling chamber 111 and the second cooling chamber 112.

[0086] The liquid inlet bend 413 includes two, as shown in Figure 3. One liquid inlet bend 413 is used to connect one of the liquid inlet branch pipes 411 to the first inlet 121, and the other liquid inlet bend 413 is used to connect the liquid inlet connecting pipe 414 to the second inlet 123.

[0087] In some embodiments, as shown in FIG5, the inlet bend 413 includes a first section 416 and a second section 417, wherein the inner diameter of the first section 416 is the same as the inner diameter of the second section 417, and the inner diameter of either the first section 416 or the second section 417 is equal to the inner diameter of the inlet branch pipe 411. The first section 416 is connected to the inlet connecting pipe 414, and a raised rib is provided at the connection between the first section 416 and the inlet connecting pipe 414, thereby forming a sealed connection between the inlet bend 413 and the inlet connecting pipe 414. The second section 417 is connected to the first inlet 121 of the housing 1, and the connection between the second section 417 and the housing 1 is provided with a smooth surface, thereby facilitating the formation of a fixed connection between the inlet bend 413 and the housing 1. The cooling medium is introduced into the first cooling chamber 111 or the second cooling chamber 112 by providing the inlet bend 413.

[0088] In some implementations, referring to Figures 2 and 3, the liquid outlet pipe 42 includes a liquid outlet tee pipe 422, a liquid outlet bend pipe 423, and a liquid outlet connecting pipe 424.

[0089] The structure of the liquid outlet tee 422 is shown in Figure 4. The liquid outlet tee 422 includes a main liquid outlet 425 and two branch liquid outlet pipes 421. One end of the main liquid outlet 425 is set as a liquid outlet 44, and the other end of the main liquid outlet 425 is connected to the two branch liquid outlet pipes 421. One of the branch liquid outlet pipes 421 is connected to a liquid outlet bend 423, which is fixedly connected to the second outlet 124. The other branch liquid outlet pipe 421 is connected to a liquid outlet connecting pipe 424, which is connected to the first outlet 122 through another liquid outlet bend 423. The two outlet branch pipes 421 have the same cross-sectional area, which is set as b. The cross-sectional area of ​​the inner bore of the main outlet pipe 425 is set as a, where 1 / 2*a≤b≤a. This ensures that the sum of the cross-sectional areas of the inner bores of the two outlet branch pipes 421 is greater than the cross-sectional area of ​​the inner bore of the main outlet pipe 425, thereby increasing the flow rate of the circulating medium inside the two outlet branch pipes 421. The main outlet pipe 425 is designed for easy disassembly and assembly, facilitating its connection to the vehicle's thermal management system. A sealing rib is provided at the connection between the outlet branch pipe 421 and the outlet connecting pipe 424, which helps to form a sealed connection between them.

[0090] The liquid outlet connection pipe 424 extends from one side of the housing 1 to the other side of the housing 1. The liquid outlet connection pipe 424 is used to connect the liquid outlet branch pipe 421 and the first outlet 122, so that the circulating medium flowing out of the first cooling chamber 111 and the second cooling chamber 112 flows into the same liquid outlet 44.

[0091] The liquid outlet bend 423 includes two, as shown in Figure 3. One of the liquid outlet bends 423 is used to connect one of the liquid outlet branch pipes 421 to the second outlet 124, and the other liquid outlet bend 423 is used to connect the liquid outlet connecting pipe 424 to the first outlet 122.

[0092] In some embodiments, the structure of the outlet bend 423 is shown in Figure 5. The outlet bend 423 includes a first section 416 and a second section 417, wherein the inner diameter of the first section 416 is the same as the inner diameter of the second section 417, and the inner diameter of either the first section 416 or the second section 417 is equal to the inner diameter of the inlet branch pipe 411. The first section 416 is connected to the outlet connecting pipe 424, and an annular rib is provided at the connection between the first section 416 and the outlet connecting pipe 424, thereby forming a sealed connection between the outlet bend 423 and the outlet connecting pipe 424. The second section 417 is connected to the first outlet 122 of the housing 1, and the connection between the second section 417 and the housing 1 is provided with a smooth surface, which facilitates the formation of a fixed connection between the outlet bend 423 and the housing 1. By providing the outlet bend 423, the circulating medium flowing out of the first cooling chamber 111 or the second cooling chamber 112 is introduced into the outlet pipe 42.

[0093] Referring again to Figures 2 and 3, the inlet connection pipe 414 and the outlet connection pipe 424 are located on the same side of the long axis of the housing 1, and are fixed by clamps. The inlet tee pipe 412 and the outlet tee pipe 422 are located on opposite sides of the long axis of the housing 1, thereby centralizing the external connection piping structure of the motor pump assembly 10, facilitating assembly, manufacturing, and connection to the vehicle's thermal management system, resulting in high production operability.

[0094] In other alternative embodiments, the inlet tee 412 and the outlet tee 422 are arranged in the short axis direction of the housing 1 and are located on the central axis of the short axis of the housing 1.

[0095] In another embodiment provided in this application, as shown in FIG6, the motor pump assembly 10 includes a connecting pipe 45 for connecting the first cooling chamber 111 and the second cooling chamber 112. The connecting pipe 45 is disposed outside the housing 1. One end of the connecting pipe 45 is connected to the first outlet 122, and the other end of the connecting pipe 45 is connected to the second outlet 124. The cooling medium enters the first inlet 121 of the first cooling chamber 111 through the liquid inlet pipe 41. The first circulating medium enters the second inlet 123 of the second cooling chamber 112 through the first outlet 122 and the connecting pipe 45. The second circulating medium flows into the liquid outlet pipe 42 through the second outlet 124.

[0096] Since the first cooling chamber 111 and the second cooling chamber 112 are connected in series through the connecting pipe 45, the flow rate of the cooling medium inside the first cooling chamber 111 and the second cooling chamber 112 is the same, which is beneficial to improving the overall cooling effect of the motor pump assembly 10.

[0097] Furthermore, since only a connecting pipe 45 is needed between the first cooling chamber 111 and the second cooling chamber 112, the T-pipe can be omitted, thereby further simplifying the structure of the cooling system of the motor pump assembly 10.

[0098] In some embodiments, as shown in FIG6, at least one guide vane 13 is provided inside the first cooling chamber 111 or the second cooling chamber 112. The at least one guide vane 13 is used to guide the flow of the cooling medium, so that the cooling medium can be fully filled in the first cooling chamber 111 or the second cooling chamber 112 without bubbles affecting the heat dissipation effect.

[0099] In some embodiments, as shown in FIG7, the first cooling element 31 or the second cooling element 32 includes a cooling plate 33 and at least one heat dissipation protrusion 34. The heat dissipation protrusion 34 protrudes from the inner surface of the cooling plate 33, and the cooling plate 33 and the heat dissipation protrusion 34 are integrally formed. The heat dissipation protrusion 34 extends inside the first cooling cavity 111 or the second cooling cavity 112. The heat dissipation protrusion 34 helps to increase the contact area between the cooling plate 33 and the cooling medium, thereby increasing the heat dissipation efficiency.

[0100] In some embodiments, as shown in FIG8, an embodiment of this application also provides a motor pump structure design scheme with a fully liquid-cooled flow channel. A cooling flow channel 7 is provided on the outer periphery of the motor. The wall where the cooling flow channel 7 is located encloses a receiving cavity for accommodating at least a part of the motor. The cooling flow channel 7 is provided with a third inlet 71 and a third outlet 72. The third inlet 71 and the third outlet 72 are configured to communicate with the cooling cavity 110. The cooling medium inside the cooling cavity 110 flows into the flow channel where the annular pipe is located through the third inlet 71, and performs sufficient heat exchange with the part of the motor surrounded by the cooling flow channel 7, thereby enabling the motor to receive sufficient heat dissipation when operating under high load and ensuring that the motor can operate fully.

[0101] The third inlet 71 and the third outlet 72 are both configured as through holes. The cooling channel 7 is located below the cooling chamber 110, so that the liquid cooling medium inside the cooling chamber 110 can flow into the annular pipe through the third inlet 71. The third outlet 72 is located on the bottom wall of the cooling chamber 110, so that the circulating medium inside the annular channel can flow back into the cooling chamber 110.

[0102] The cooling channel 7 includes an inflow channel 73 and an outflow channel 74. The inflow channel 73 is connected to the third inlet 71, and the outflow channel 74 is connected to the third outlet 72. The liquid cooling medium inside the cooling chamber 110 flows into the inflow channel 73 through the third inlet 71, and the circulating medium enters the outflow channel 74 and flows back into the cooling chamber 110 through the third outlet 72.

[0103] In some embodiments, the housing defining the receiving cavity 14 of the motor is configured as a double-layer plate, with the aforementioned cooling channel 7 disposed between the two layers. The cooling channel 7 may be a series of annular channels, with the inflow channel 73 and the outflow channel 74 located in different annular channels. The cooling channel 7 may also be multiple fan-shaped channels, with adjacent fan-shaped channels separated by partition walls.

[0104] The motor comprises a stator and a rotor, which work together to convert electrical energy into mechanical energy. When the stator windings are energized, they generate a magnetic field, providing the power source for the motor's operation and supporting and fixing the entire motor structure. The rotor is configured to generate torque under the influence of the stator's rotating magnetic field, thus converting electrical energy into mechanical energy and driving the hydraulic pump. The stator generates considerable heat during operation, especially under heavy loads; therefore, the aforementioned cooling channel 7 can be configured to surround the stator of the motor.

[0105] Thirdly, this application also provides a chassis assembly, including the suspension system of the first aspect, or the electric motor pump assembly of the second aspect. Since this chassis assembly possesses all the features and advantages of the aforementioned electric motor pump assembly or suspension system, they will not be repeated here.

[0106] Fourthly, this application also provides a vehicle 100, as shown in FIG9, which includes a suspension as described in the first aspect, an electric motor pump assembly as described in the second aspect, or a chassis assembly as described in the third aspect. For example, the vehicle 100 may be an electric vehicle, a hybrid vehicle, or a gasoline vehicle. The vehicle possesses all the features and advantages of the aforementioned electric motor pump assembly, suspension system, or chassis assembly, which will not be repeated here.

[0107] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0108] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0109] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0110] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. An electric motor pump assembly, comprising: The housing (1) is provided with a receiving cavity (14); Electric pumps (21, 22), at least a portion of which are disposed within the receiving cavity (14); A cooling structure, wherein the cooling structure is provided with cooling channels; The housing (1) is provided with an inlet (121, 123) and an outlet (122, 124), and the cooling channel connects the inlet (121, 123) and the outlet (122, 124) so ​​that the external liquid cooling medium flows through the cooling channel to cool the motor pump (21, 22).

2. The motor pump assembly according to claim 1, wherein, The cooling structure includes a cooling chamber (110) disposed inside the housing (1), and an external liquid cooling medium flows into the cooling chamber (110) through the inlet (121, 123), and a circulating medium flows out of the cooling chamber (110) through the outlet (122, 124). The cooling structure also includes an inlet pipe (41) and an outlet pipe (42) disposed outside the housing (1). One end of the inlet pipe (41) is provided with an inlet port (43), and one end of the outlet pipe (42) is provided with an outlet port (44). The inlet pipe (41) is connected to the inlet (121, 123), and the outlet pipe (42) is connected to the outlet (122, 124). External liquid cooling medium flows into the inlet pipe (41) through the inlet port (43), and circulating medium flows into the outlet pipe (42) through the outlet (122, 124) and flows out through the outlet port (44).

3. The motor pump assembly according to claim 2, wherein, It also includes a control module (5), which is electrically connected to the motor pumps (21, 22) and is located above the motor pumps (21, 22); Cooling components (31, 32) are provided, which together with the housing (1) form the cooling cavity (110); Heat-conducting components (61, 62) are disposed between the cooling components (31, 32) and the control module (5). The liquid cooling medium inside the cooling chamber (111, 112) is configured to simultaneously cool the motor pump (21, 22) and the control module (5).

4. The motor pump assembly according to claim 2 or 3, wherein, The electric pumps (21, 22) include a first electric pump (21) and a second electric pump (22), and the first electric pump (21) and the second electric pump (22) are coaxially arranged along the long axis of the housing (1); The cooling chamber (110) includes a first cooling chamber (111) and a second cooling chamber (112). The first cooling chamber (111) is configured to correspond to the first motor (211), and the second cooling chamber (112) is configured to correspond to the second motor (221). The first cooling chamber (111) is configured with a first inlet (121) and a first outlet (122), and the second cooling chamber (112) is configured with a second inlet (123) and a second outlet (124). The inlet pipe (41) connects the first inlet (121) and the second inlet (123), and the outlet pipe (42) connects the second outlet (124) and the first outlet (122); or, the inlet pipe (41) connects the first inlet (121), the first outlet (122) and the second inlet (123) are connected, and the outlet pipe (42) connects the second outlet (124).

5. The motor pump assembly according to claim 4, wherein, The inlet pipe (41) includes an inlet tee pipe (412), which includes an inlet main pipe (415) and two inlet branch pipes (411). The two inlet branch pipes (411) are connected to one end of the inlet main pipe (415), and the other end of the inlet main pipe (415) is configured as the inlet port (43). One of the inlet branch pipes (411) is connected to the first inlet (121), and the other inlet branch pipe (411) is connected to the second inlet (123).

6. The motor pump assembly according to claim 5, wherein, The liquid outlet pipe (42) includes a liquid outlet tee pipe (422), which includes a main liquid outlet pipe (425) and two branch liquid outlet pipes (421). The two branch liquid outlet pipes (421) are connected to one end of the main liquid outlet pipe (425), and the other end of the main liquid outlet pipe (425) is configured as the liquid outlet (44). One of the branch liquid outlet pipes (421) is connected to the first outlet (122), and the other branch liquid outlet pipe (421) is connected to the second outlet (124).

7. The motor pump assembly according to claim 6, wherein, The cross-sectional areas of the inner holes of the two inlet branch pipes (411) or the two outlet branch pipes (421) are the same. The cross-sectional area of ​​the inner hole of the main inlet pipe (415) or the main outlet pipe (425) is set to a, and the cross-sectional area of ​​the inner hole of the inlet branch pipe (411) or the outlet branch pipe (421) is set to b, where 1 / 2*a≤b≤a.

8. The motor pump assembly according to claim 6 or 7, wherein, The inlet pipe (41) includes an inlet connecting pipe (414), which connects the inlet branch pipe (411) and the second inlet (123); the outlet pipe (42) includes an outlet connecting pipe (424), which connects the first outlet (122) and the outlet branch pipe (421), and the inlet connecting pipe (414) and the outlet connecting pipe (424) are located on the same side of the housing (1).

9. The motor pump assembly according to claim 8, wherein, The inlet tee (412) and the outlet tee (422) are located on both sides of the long axis of the housing (1).

10. The motor pump assembly according to claim 8, wherein, Both the inlet tee (412) and the outlet tee (422) are located on the central axis of the short axis of the housing (1).

11. The motor pump assembly according to claim 5, wherein, The inlet pipe (41) includes two inlet bends (413), which are respectively disposed on both sides of the long axis of the housing (1). One of the inlet bends (413) is used to connect to one of the inlet branches (411) and the first inlet (121), and the other inlet bend (413) is used to connect to the other inlet branch (411) and the second inlet (123).

12. The motor pump assembly according to claim 6, wherein, The liquid outlet pipe (42) includes two liquid outlet bends (423), which are respectively disposed on both sides of the long axis of the housing (1). One of the liquid outlet bends (423) is used to connect one of the liquid outlet branches (421) and the first outlet (122), and the other liquid outlet bend (423) is used to connect the other liquid outlet branch (421) and the second outlet (124).

13. The motor pump assembly according to claim 4, wherein, It also includes a connecting pipe (45) disposed outside the housing (1), the connecting pipe (45) connecting the first outlet (122) and the second inlet (123).

14. The motor pump assembly according to claim 3, wherein, The cooling components (31, 32) include a cooling plate (33) and at least one heat dissipation protrusion (34) protruding from the inner surface of the cooling plate (33), and the at least one heat dissipation protrusion (34) extends within the cooling cavity (110).

15. The motor pump assembly according to any one of claims 2-14, wherein, At least one guide vane (13) is provided inside the cooling chamber (110).

16. The motor pump assembly according to claim 2, wherein, The cooling structure further includes a cooling channel (7) disposed on the housing. The wall where the cooling channel (7) is located encloses the receiving cavity (14). The cooling channel (7) is provided with a third inlet (71) and a third outlet (72). The third inlet (71) and the third outlet (72) are both connected to the cooling cavity (110). The liquid cooling medium inside the cooling cavity (110) flows into the cooling channel (7) through the third inlet (71) to cool at least a part of the motor pump. The circulating medium flows out through the third outlet (72).

17. The motor pump assembly according to claim 16, wherein, The cooling channel (7) includes at least one annular channel; or the cooling channel (7) includes at least two fan-shaped channels.

18. A suspension system comprising a first shock absorber, a second shock absorber, and an electric motor pump assembly according to any one of claims 1-17, the electric motor pump comprising a first electric motor pump (21) and a second electric motor pump (22), the first electric motor pump (21) being connected to the first shock absorber and the second electric motor pump (22) being connected to the second shock absorber.

19. A chassis assembly comprising the motor pump assembly of any one of claims 1-17 or the suspension system of claim 18.

20. A vehicle (100) comprising the motor pump assembly of any one of claims 1-17, the suspension system of claim 18, or the chassis assembly of claim 19.

Images