Composite cooling type housing and motor

Abstract

The application discloses a composite cooling type machine shell and a motor. The composite cooling type machine shell comprises a shell assembly, a motor shell with a cylindrical structure, and a front end cover and a rear end cover installed at two ends of the motor shell; a cooling assembly comprising an oil circulation assembly, an oil circuit pipeline and a water circuit pipeline, the oil circulation assembly being arranged on the outer circumferential surface of the motor shell and being connected between the motor shell and the oil circuit pipeline, and being used for cooling and circulating oil medium in the oil circuit pipeline and the shell assembly; the oil circuit pipeline is respectively arranged in the motor shell, the front end cover and the rear end cover and extends to the inside of the shell assembly; the water circuit pipeline extends from the oil circulation assembly to the motor shell, and the water circuit pipeline is arranged in the inside of the motor shell along the circumference of the motor shell and avoids the oil circuit pipeline. The composite cooling type machine shell and the motor can consider the cooling effect and the space layout problem of the motor, so that the durability and the adaptability of the motor are improved.

Description

Technical Field

[0001] This application belongs to the field of motor technology, and in particular relates to a composite cooling type housing and motor. Background Technology

[0002] With the development of the automotive industry, the performance requirements for motors in vehicles are gradually increasing, and the cooling efficiency of the motor itself is an important factor affecting motor performance.

[0003] Currently, considering the unsprung mass and installation space of vehicles, water-cooled or oil-cooled motors are commonly used. However, water-cooling or oil-cooling alone has the drawback of poor cooling effect, which limits further improvement in motor performance. If the water-cooling system and oil-cooling system are installed separately on the motor, the overall size of the motor will be too large due to the large space occupied by the water-cooling system and oil-cooling system, making it difficult to arrange the motor in the vehicle. Utility Model Content

[0004] This application provides a composite cooling housing and motor that can balance the cooling effect of the motor with space layout issues, thereby improving the durability and adaptability of the motor.

[0005] This application provides a composite cooling housing, comprising a housing assembly including a cylindrical motor housing and a front end cover and a rear end cover mounted at both ends of the motor housing; and a cooling assembly including an oil circulation assembly, an oil passage pipe, and a water passage pipe. The oil circulation assembly is disposed on the outer circumferential surface of the motor housing and connected between the motor housing and the oil passage pipe, for cooling and circulating the oil medium in the oil passage pipe and the housing assembly. The oil passage pipe passes through the motor housing, the front end cover, and the rear end cover respectively and extends into the interior of the housing assembly. The water passage pipe extends from the oil circulation assembly to the motor housing, and the water passage pipe passes through the interior of the motor housing along the circumference of the motor housing and avoids the oil passage pipe.

[0006] The above-mentioned composite cooling housing includes an inner shell, an outer shell, and multiple isolation blocks connected between the inner shell and the outer shell. The multiple isolation blocks are arranged at intervals along the circumference of the inner shell to form a water pipe between the inner shell and the outer shell. The oil pipe passes through the outer shell, the multiple isolation blocks, and the inner shell in sequence.

[0007] The composite cooling housing described above includes an external water pipe and an internal water pipe connected to each other. The external water pipe is connected between the oil circulation assembly and the internal water pipe. The internal water pipe includes a plurality of first cooling pipes arranged at intervals along the circumference of the motor housing and a second cooling pipe connected between adjacent first cooling pipes. Adjacent first cooling pipes are separated by a partition block.

[0008] In the above-mentioned composite cooling housing, each of the first cooling pipes extends along the axial direction of the motor housing, and the extension length of the first cooling pipe is equal to the length of the motor housing in its axial direction. The second cooling pipes arranged adjacent to each other in the circumferential direction of the motor housing are respectively opened at both ends of the motor housing in its axial direction.

[0009] The composite cooling housing described above includes an oil conduit and an oil drain pipe. The oil conduit passes through the outer shell, multiple isolation blocks, and the inner shell in sequence and extends into the interior of the inner shell. The oil drain pipe is distributed in the front and rear covers and is connected to the oil conduit, used to drain the oil medium from the front and rear covers into the motor housing.

[0010] The composite cooling housing described above includes an oil inlet pipe section, an axially extending oil guide pipe section, and a first and second oil outlet pipe section arranged at intervals along the axial direction. The oil guide pipe section is connected to the oil circulation assembly through the oil inlet pipe section and is connected to the interior of the inner housing through the first and second oil outlet pipe sections.

[0011] The composite cooling housing described above includes an oil drain pipe section that passes through the front cover. One end of the third oil drain pipe section is connected to the oil guide pipe, and the other end extends to the end face of the front cover facing the inside of the motor housing.

[0012] The composite cooling housing described above includes an end cover body and a low-pressure cover plate located at the center of the end cover body. The oil drain pipe includes a fourth oil drain pipe section passing through the end cover body and a fifth oil drain pipe section passing through the low-pressure cover plate. One end of the fourth oil drain pipe section is connected to the oil guide pipe, and the other end extends to the end face of the end cover body facing the inside of the motor housing. One end of the fifth oil drain pipe section is connected to the fourth oil drain pipe section, and the other end extends to the end face of the low-pressure cover plate facing the inside of the motor housing.

[0013] The composite cooling housing described above includes an oil collection tank located at the bottom of the motor housing and connected to the motor housing. The oil circulation assembly includes a filter, a pump body, and a cooling component connected in sequence along the circumference of the motor housing. The filter is connected to the oil collection tank, the cooling component is connected to the oil pipeline, and the water pipeline passes through the cooling component for cooling the cooling component.

[0014] On the other hand, this application also provides an electric motor, which includes the above-mentioned composite cooling housing. The electric motor also includes a drive assembly, including a stator structure, a rotor structure, a first bearing, and a second bearing. The first bearing, the stator structure, and the second bearing are sequentially arranged on the outer peripheral surface of the rotor structure along the axial direction. The first bearing is disposed near the front end cover, and the second bearing is disposed near the rear end cover.

[0015] The composite cooling housing of this application includes a housing assembly and a cooling assembly. The housing assembly includes a cylindrical motor housing and front and rear covers installed at both ends of the motor housing. The cooling assembly includes an oil circulation assembly, oil pipes, and water pipes. The oil circulation assembly is located outside the housing assembly, while the oil pipes and water pipes are installed inside the housing assembly and are arranged to avoid each other. When cooling the drive assembly inside the housing assembly, oil cooling and water cooling can be achieved through the oil pipes and water pipes, respectively. The oil circulation assembly can circulate and cool the oil medium in the oil pipes, thereby maintaining the oil cooling effect on the outer peripheral surface and both ends of the drive assembly. The water pipes extend from the oil circulation assembly into the motor housing to achieve the water cooling effect on the oil circulation assembly and the cooling effect on the outer peripheral surface of the drive assembly, respectively.

[0016] Therefore, this application integrates oil and water pipes inside the housing assembly and achieves oil circulation through an external oil circulation assembly, thus balancing the overall cooling effect and space layout issues, and improving the durability and adaptability of the motor. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the external structure of the composite cooling housing according to an embodiment of this application;

[0019] Figure 2 This is a schematic diagram of the internal structure of the composite cooling housing according to an embodiment of this application;

[0020] Figure 3 This is a schematic diagram of the water pipes of the composite cooling casing according to an embodiment of this application;

[0021] Figure 4 This is a schematic diagram of the internal structure of the motor according to an embodiment of this application;

[0022] Figure 5 This is a schematic diagram of the internal water pipes of the composite cooling casing according to an embodiment of this application after being blocked;

[0023] Figure 6 This is a schematic diagram of the housing assembly of the composite cooling type housing according to an embodiment of this application.

[0024] Explanation of icon numbers:

[0025] 1. Housing assembly; 11. Motor housing; 111. Inner housing; 112. Outer housing; 113. Isolation block; 12. Front cover; 13. Rear cover; 131. End cover body; 132. Low-pressure cover plate; 14. Oil collection tank; 15. Mounting housing;

[0026] 2. Drive assembly; 21. Stator structure; 211. Crown end; 212. Welded end; 22. Rotor structure; 23. First bearing; 24. Second bearing;

[0027] 3. Cooling components; 31. Oil circulation components; 311. Filter; 312. Pump body; 313. Cooling components; 32. Oil piping; 321. Oil guide pipe; 3211. Oil inlet pipe section; 3212. Oil guide pipe section; 3213. First oil drain pipe section; 3214. Second oil drain pipe section; 322. Oil drain pipe; 3221. Third oil drain pipe section; 3222. Fourth oil drain pipe section; 3223. Fifth oil drain pipe section; 33. Water piping; 331. External water piping; 332. Internal water piping; 3321. First cooling pipe; 3322. Second cooling pipe. Detailed Implementation

[0028] The features and exemplary embodiments of various aspects of this application will be described in detail below. To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain this application and not to limit it. For those skilled in the art, this application can be implemented without some of these specific details. The following description of the embodiments is merely to provide a better understanding of this application by illustrating examples.

[0029] like Figures 1 to 6 As shown, this application embodiment provides a composite cooling type housing, which includes a housing assembly 1, including a cylindrical motor housing 11 and a front end cover 12 and a rear end cover 13 installed at both ends of the motor housing 11; a cooling assembly 3, including an oil circulation assembly 31, an oil pipe 32 and a water pipe 33. The oil circulation assembly 31 is disposed on the outer peripheral surface of the motor housing 11 and connected between the motor housing 11 and the oil pipe 32, and is used to cool and circulate the oil medium in the oil pipe 32 and the housing assembly 1. The oil pipe 32 passes through the motor housing 11, the front end cover 12 and the rear end cover 13 respectively and extends into the interior of the housing assembly 1. The water pipe 33 extends from the oil circulation assembly 31 to the motor housing 11, and the water pipe 33 passes through the interior of the motor housing 11 along the circumference of the motor housing 11 and avoids the oil pipe 32.

[0030] In specific implementation, the composite cooling type housing of this application embodiment includes a housing assembly 1 and a cooling assembly 3. The housing assembly 1 includes a cylindrical motor housing 11 and a front cover 12 and a rear cover 13 installed at both ends of the motor housing 11. The front cover 12 and the rear cover 13 can seal the open parts at both ends of the motor housing 11 so that a closed space is formed inside the motor, which facilitates the operation of the motor as a whole.

[0031] The cooling assembly 3 includes an oil circulation assembly 31, an oil passage pipe 32, and a water passage pipe 33. The oil circulation assembly 31 is located outside the housing assembly 1, while the oil passage pipe 32 and the water passage pipe 33 are installed inside the housing assembly 1 and are arranged to avoid each other. When cooling the drive assembly 2 inside the housing assembly 1, oil cooling and water cooling can be achieved through the oil passage pipe 32 and the water passage pipe 33, respectively. The oil circulation assembly 31 can circulate and cool the oil medium in the oil passage pipe 32, thereby maintaining the oil cooling effect on the outer peripheral surface and both ends of the drive assembly 2. The water passage pipe 33 extends from the oil circulation assembly 31 into the motor housing 11 to achieve the water cooling effect on the oil circulation assembly 31 and the cooling effect on the outer peripheral surface of the drive assembly 2, respectively.

[0032] Therefore, this application integrates the oil pipe 32 and water pipe 33 inside the housing assembly 1 and realizes oil circulation through the external oil circulation assembly 31, which takes into account the overall cooling effect and space layout issues, and improves the durability and adaptability of the motor.

[0033] Specifically, the cooling water in the water pipe 33 is circulated through a circulation device outside the casing to achieve continuous flow of cooling water in the water pipe 33, and to continuously draw low-temperature cooling water to cool the casing and its internal structure.

[0034] like Figure 2 As shown in the embodiment of this application, the composite cooling housing includes an inner shell 111, an outer shell 112, and a plurality of isolation blocks 113 connected between the inner shell 111 and the outer shell 112. The plurality of isolation blocks 113 are arranged at intervals along the circumference of the inner shell 111 to form a water pipe 33 between the inner shell 111 and the outer shell 112. An oil pipe 32 is sequentially inserted through the outer shell 112, the plurality of isolation blocks 113, and the inner shell 111.

[0035] In practice, multiple isolation blocks 113 are arranged at intervals along the circumference of the inner shell 111 on the surface of the inner shell 111 and connected between the inner shell 111 and the outer shell 112, thereby dividing the space between the inner shell 111 and the outer shell 112 to form a water pipe 33 for cooling water to pass through. The water pipe 33 is a continuous pipe that can surround the inner shell 111 circumferentially to cool the drive component 2 inside the inner shell 111 in all circumferential directions, thereby improving the cooling effect inside the inner shell 111.

[0036] The oil pipe 32 is sequentially installed through the outer shell 112, multiple isolation blocks 113 and the inner shell 111. When the oil pipe 32 enters the inner shell 111, it needs to be installed through the isolation block 113 to avoid conflict with the water pipe 33 and cause the oil medium and water medium to mix, which would affect the normal operation of the motor.

[0037] like Figure 1 , Figure 2 and Figure 6 As shown in the embodiment of this application, the composite cooling housing includes a water pipe 33 comprising an external water pipe 331 and an internal water pipe 332 connected to each other. The external water pipe 331 is connected between the oil circulation assembly 31 and the internal water pipe 332. The internal water pipe 332 includes a plurality of first cooling pipes 3321 arranged circumferentially along the motor housing 11 and a second cooling pipe 3322 connected between adjacent first cooling pipes 3321. Adjacent first cooling pipes 3321 are separated by an isolation block 113.

[0038] in, Figure 6 The complete external water pipe 331 is not shown in the image; only the inlet section of the external water pipe 331 in the motor housing 11 is shown.

[0039] In specific implementation, the external water pipe 33 is connected between the oil circulation component 31 and the internal water pipe 332, and is located outside the motor housing 11. It can cool the oil circulation component 31 and the oil medium inside the oil circulation component 31. On the one hand, it prevents the oil circulation component 31 from overheating, and on the other hand, it further reduces the temperature of the oil medium and improves the cooling effect of the oil medium.

[0040] like Figure 3 As shown, the isolation block 113 can form first cooling pipes 3321 at intervals, so that adjacent first cooling pipes 3321 can be set separately to avoid the first cooling pipes 3321 being connected as a whole, so that cooling water can flow along the first cooling pipes 3321, increasing the overall flow path and achieving a better cooling effect; adjacent first cooling pipes 3321 are connected by second cooling pipes 3322, so that the internal water pipes 332 form a whole pipe that is connected around the motor housing 11, so as to cool the drive components 2 inside the motor housing 11 in all directions around the circumference, thereby improving the cooling effect inside the motor housing 11.

[0041] In the composite cooling housing of this application embodiment, each first cooling pipe 3321 extends along the axial direction of the motor housing 11, and the extension length of the first cooling pipe 3321 is equal to the length of the motor housing 11 in its axial direction. The second cooling pipes 3322 arranged adjacent to each other in the circumferential direction of the motor housing 11 are respectively opened at both ends of the motor housing 11 in its axial direction.

[0042] In specific implementation, the first cooling pipes 3321 all extend along the axial direction of the motor housing 11, and the extension length of the first cooling pipes 3321 is equal to the length of the motor housing 11 in its axial direction, so that the first cooling pipes 3321 can cover the axial length of the motor housing 11, thereby cooling the drive components 2 inside the motor housing 11 at various positions in the axial direction, ensuring the overall cooling effect.

[0043] The second cooling pipes 3322, which are arranged adjacent to each other in the circumferential direction of the motor housing 11, are respectively opened at both ends of the motor housing 11 in the axial direction. This allows the cooling water to flow through the first cooling pipe 3321 and then through the second cooling pipe 3322 to the adjacent first cooling pipe 3321, thus achieving a Z-shaped or S-shaped flow path. This further increases the cooling area and flow path of the cooling water and improves the cooling effect.

[0044] Specifically, the multiple isolation blocks 113 are divided into two groups. One group of isolation blocks 113 is located near one end of the front end cover 12 and extends axially to a certain distance from the end face of the inner shell 111 on the side of the rear end cover 13, so as to form a second cooling pipe 3322. The other group of isolation blocks 113 is located near one end of the rear end cover 13 and extends axially to a certain distance from the end face of the inner shell 111 on the side of the front end cover 12, so as to form a second cooling pipe 3322. A first cooling pipe 3321 extending axially along the motor housing 11 can be formed between the circumferentially adjacent isolation blocks 113.

[0045] In the embodiments of this application, Figure 2 The diagram shows the structure of the isolation block 113. When connecting the isolation block 113 to the outer shell 112, friction welding is used, and a connecting ring structure is provided between the two to achieve stable friction welding. After welding, the isolation block 113 and the outer shell 112 are tightly fitted together, and... Figure 5 As shown, at both ends of the motor housing 11, the end faces of the space where the isolation block 113 is located are sealed by friction welding to form a sealed space between the inner shell 111 and the outer shell 112. In this way, the water pipe 33 is a closed pipe in a sealed space, which prevents the water medium from flowing out from the end face and affecting the normal operation of the motor, thus improving the operating stability of the motor.

[0046] like Figure 4 As shown in the embodiment of this application, the composite cooling housing includes an oil passage 32 comprising an oil guide pipe 321 and an oil drain pipe 322. The oil guide pipe 321 passes sequentially through the outer shell 112, multiple isolation blocks 113, and the inner shell 111 and extends into the interior of the inner shell 111. The oil drain pipe 322 is distributed within the front cover 12 and the rear cover 13 and is connected to the oil guide pipe 321, for draining the oil medium from the front cover 12 and the rear cover 13 into the motor housing 11.

[0047] In specific implementation, the oil guide pipe 321 is sequentially installed through the outer shell 112, multiple isolation blocks 113 and the inner shell 111 and extends into the interior of the inner shell 111. The oil guide pipe 321 can guide the oil medium located in the oil circulation component 31 outside the outer shell 112 into the interior of the inner shell 111, thereby achieving an oil cooling effect on the outer peripheral surface of the drive component 2 inside the motor housing 11. Furthermore, the oil guide pipe 321 can further guide the oil medium into the oil drain pipe 322 connected to it, so that the oil drain pipe 322 drains the oil medium from the front end cover 12 and the rear end cover 13 into the motor housing 11, thereby achieving an oil cooling effect on both ends and the inner surface of the drive component 2 inside the motor housing 11, realizing comprehensive cooling of the drive component 2 inside and out. Combined with water cooling, it further improves the overall cooling effect.

[0048] like Figure 4 As shown in the embodiment of this application, the composite cooling housing includes an oil guide pipe 321 comprising an oil inlet pipe section 3211, an axially extending oil guide pipe section 3212, and a first oil outlet pipe section 3213 and a second oil outlet pipe section 3214 arranged at intervals along the axial direction. The oil guide pipe section 3212 is connected to the oil circulation assembly 31 through the oil inlet pipe section 3211, and is connected to the interior of the inner shell 111 through the first oil outlet pipe section 3213 and the second oil outlet pipe section 3214.

[0049] In specific implementation, the oil medium in the oil circulation component 31 can enter the oil guide pipe section 3212 through the oil inlet pipe section 3211 and flow axially along the oil guide pipe section 3212. It flows to the first oil outlet pipe section 3213 and the second oil outlet pipe section 3214 that are spaced apart axially and enters the inner shell 111 to cool the outer peripheral surface of the drive component 2 at different positions in the axial direction, thereby improving the cooling effect on the outer peripheral surface of the drive component 2.

[0050] Specifically, the oil inlet pipe section 3211 is axially connected to the middle of the oil guide pipe section 3212 so that the oil medium can flow to both ends respectively, thereby ensuring the uniformity of the oil medium flow and ensuring the uniform cooling effect at each location.

[0051] In this embodiment, the drive assembly 2 includes a stator structure 21 and a rotor structure 22. The stator structure 21 is sleeved on the outer peripheral surface of the rotor structure 22. The stator structure 21 has a crown end 211 and a welded end 212. The crown end 211 is located close to the front end cover 12. The first oil pipe section 3213 is axially opposite to the crown end 211, and the oil medium discharged from it can cool the crown end 211. The welded end 212 is located close to the rear end cover 13. The second oil pipe section 3214 is axially opposite to the welded end 212, and the oil medium discharged from it can cool the welded end 212, thereby achieving accurate cooling of the stator structure 21 and improving the overall cooling effect.

[0052] like Figure 4 As shown in the embodiment of this application, the composite cooling housing includes an oil drain pipe 322, which includes a third oil drain pipe section 3221 that passes through the front end cover 12. One end of the third oil drain pipe section 3221 is connected to the oil guide pipe 321, and the other end extends to the end face of the front end cover 12 facing the inside of the motor housing 11.

[0053] In practice, the third oil pipe section 3221 can guide the oil medium in the oil guide pipe 321 to the end face of the front cover 12 facing the inside of the motor housing 11, thereby oil cooling the end of the drive assembly 2 near the front cover 12 and ensuring comprehensive cooling.

[0054] In this embodiment, the drive assembly 2 further includes a first bearing 23, which is disposed on the outer peripheral surface of the rotor structure 22 and close to the front end cover 12. The third oil pipe section 3221 can guide the oil medium to the first bearing 23 to cool the first bearing 23 and prevent overheating at the connection between the first bearing 23 and the rotor structure 22, thereby achieving a targeted cooling effect.

[0055] like Figure 4 As shown in the embodiment of this application, the composite cooling housing includes a rear end cover 13 comprising an end cover body 131 and a low-pressure cover plate 132 disposed at the center of the end cover body 131. The oil drain pipe 322 includes a fourth oil drain pipe section 3222 passing through the end cover body 131 and a fifth oil drain pipe section 3223 passing through the low-pressure cover plate 132. One end of the fourth oil drain pipe section 3222 is connected to the oil drain pipe 321, and the other end extends to the end face of the end cover body 131 facing the interior of the motor housing 11. One end of the fifth oil drain pipe section 3223 is connected to the fourth oil drain pipe section 3222, and the other end extends to the end face of the low-pressure cover plate 132 facing the interior of the motor housing 11.

[0056] In specific implementation, the rear end cover 13 includes an end cover body 131 and a low-pressure cover plate 132. The low-pressure cover plate 132 is located at the center of the end cover body 131 and is correspondingly arranged with the rotor structure 22 to improve the encapsulation effect on the motor housing 11. The fourth oil drain pipe section 3222 of the oil drain pipe 322 passes through the end cover body 131 and can guide the oil medium in the oil drain pipe 321 to the end face of the end cover body 131 facing the inside of the motor housing 11, thereby cooling the end of the drive assembly 2 near the rear end cover 13. The fifth oil drain pipe section 3223 passes through the low-pressure cover plate 132 and can guide the oil medium in the oil drain pipe 321 to the end face of the low-pressure cover plate 132 facing the inside of the motor housing 11, thereby cooling the rotor structure 22. At the same time, it ensures the cooling effect on one end of the drive assembly 2 and the internal rotor structure 22, ensuring comprehensive cooling.

[0057] In this embodiment, the drive assembly 2 further includes a second bearing 24, which is disposed on the outer peripheral surface of the rotor structure 22 and close to the rear end cover 13. The fifth oil drain pipe section 3223 can guide the oil medium to the second bearing 24 to cool the second bearing 24 and prevent overheating at the connection between the second bearing 24 and the rotor structure 22, thereby achieving a targeted cooling effect.

[0058] like Figure 6 As shown in the embodiment of this application, the composite cooling housing includes a housing assembly 1 further comprising an oil collection shell 14 disposed at the bottom of the motor housing 11 and connected to the motor housing 11, and an oil circulation assembly 31 comprising a filter element 311, a pump body 312 and a cooling element 313 connected sequentially along the circumference of the motor housing 11. The filter element 311 is connected to the oil collection shell 14, the cooling element 313 is connected to the oil passage pipe 32, and a water passage pipe 33 passes through the cooling element 313 for cooling the cooling element 313.

[0059] In practice, after the drive assembly 2 inside the motor housing 11 is cooled, the cooling oil medium can be concentrated at the bottom of the motor housing 11 under the action of gravity and enter the oil collection tank 14. Since the oil collection tank 14 is connected to the filter element 311, under the driving action of the pump body 312, the oil medium can enter the filter element 311 from the oil collection tank 14. After being filtered by the filter element 311, the oil medium can enter the cooling element 313 for cooling, and finally enter the motor housing 11 through the oil passage 32 to circulate and cool the drive assembly 2.

[0060] Specifically, such as Figure 6 As shown, the housing assembly 1 also includes a mounting shell 15, which is located at the bottom of the motor housing 11 and communicates with the oil collection shell 14. The filter element 311 and the pump body 312 are located inside the mounting shell 15, which facilitates disassembly and maintenance.

[0061] like Figure 4 As shown, this application embodiment also provides an electric motor, which includes the above-mentioned composite cooling housing. The electric motor also includes a drive assembly 2, which includes a stator structure 21, a rotor structure 22, a first bearing 23 and a second bearing 24. The first bearing 23, the stator structure 21 and the second bearing 24 are arranged axially on the outer peripheral surface of the rotor structure 22. The first bearing 23 is disposed near the front end cover 12 and the second bearing 24 is disposed near the rear end cover 13.

[0062] In specific implementation, the motor of this application includes a composite cooling housing and a drive assembly 2 disposed within the composite cooling housing. The composite cooling housing includes a housing assembly 1 and a cooling assembly 3. The housing assembly 1 includes a cylindrical motor housing 11 and a front end cover 12 and a rear end cover 13 installed at both ends of the motor housing 11. The drive assembly 2 is installed inside the motor housing 11 and enclosed by the front end cover 12 and the rear end cover 13. The cooling assembly 3 includes an oil circulation assembly 31, an oil passage pipe 32, and a water passage pipe 33. The oil circulation assembly 31 is located outside the housing assembly 1, and the oil passage pipe 32 and... The water pipes 33 are installed inside the housing assembly 1 and are arranged to avoid each other. When cooling the drive assembly 2 inside the housing assembly 1, oil cooling and water cooling can be achieved through the oil pipes 32 and water pipes 33 respectively. The oil circulation assembly 31 can circulate and cool the oil medium in the oil pipes 32, thereby maintaining the oil cooling effect on the outer peripheral surface and both ends of the drive assembly 2. The water pipes 33 extend from the oil circulation assembly 31 into the motor housing 11 to achieve the water cooling effect on the oil circulation assembly 31 and the cooling effect on the outer peripheral surface of the drive assembly 2 respectively. Therefore, by integrating the oil pipes 32 and water pipes 33 inside the housing assembly 1 and achieving oil circulation through the external oil circulation assembly 31, this application takes into account the overall cooling effect and space layout issues, and improves the durability and adaptability of the motor.

[0063] Specifically, the rotor structure 22 has oil throwing holes, which are spaced apart on the rotor structure 22 and penetrate through the inner and outer surfaces of the rotor structure. When there is oil medium inside the rotor structure 22, the rotation of the rotor structure 22 can throw out the internal oil medium and reach the inner surface of the stator structure 21 for cooling, thereby ensuring the comprehensiveness of cooling and improving the overall cooling effect of the drive assembly 2.

[0064] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes said element.

[0065] The above description is merely a specific implementation of this application. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, modules, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here. It should be understood that the protection scope of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the protection scope of this application.

Claims

1. A composite cooling housing, characterized in that, include: The housing assembly (1) includes a cylindrical motor housing (11) and a front end cover (12) and a rear end cover (13) installed at both ends of the motor housing (11); The cooling assembly (3) includes an oil circulation assembly (31), an oil pipe (32), and a water pipe (33). The oil circulation assembly (31) is located on the outer peripheral surface of the motor housing (11) and connected between the motor housing (11) and the oil pipe (32). It is used to cool and circulate the oil medium in the oil pipe (32) and the housing assembly (1). The oil pipe (32) passes through the motor housing (11), the front end cover (12), and the rear end cover (13) and extends into the housing assembly (1). The water pipe (33) extends from the oil circulation assembly (31) to the motor housing (11) and passes through the motor housing (11) circumferentially and avoids the oil pipe (32).

2. The composite cooling housing according to claim 1, characterized in that, The motor housing (11) includes an inner shell (111), an outer shell (112), and a plurality of isolation blocks (113) connected between the inner shell (111) and the outer shell (112). The plurality of isolation blocks (113) are arranged at intervals along the circumference of the inner shell (111) to form a water pipe (33) between the inner shell (111) and the outer shell (112). The oil pipe (32) passes through the outer shell (112), the plurality of isolation blocks (113), and the inner shell (111) in sequence.

3. The composite cooling housing according to claim 2, characterized in that, The water pipe (33) includes an external water pipe (331) and an internal water pipe (332) connected to each other. The external water pipe (331) is connected between the oil circulation assembly (31) and the internal water pipe (332). The internal water pipe (332) includes a plurality of first cooling pipes (3321) arranged circumferentially along the motor housing (11) and a second cooling pipe (3322) connected between adjacent first cooling pipes (3321). Adjacent first cooling pipes (3321) are separated by the isolation block (113).

4. The composite cooling housing according to claim 3, characterized in that, Each of the first cooling pipes (3321) extends along the axial direction of the motor housing (11), and the extension length of the first cooling pipe (3321) is equal to the length of the motor housing (11) in its axial direction. The second cooling pipes (3322) arranged adjacent to each other in the circumferential direction of the motor housing (11) are respectively opened at both ends of the motor housing (11) in its axial direction.

5. The composite cooling housing according to claim 2, characterized in that, The oil pipeline (32) includes an oil guide pipeline (321) and an oil drain pipeline (322). The oil guide pipeline (321) passes through the outer shell (112), the plurality of isolation blocks (113) and the inner shell (111) in sequence and extends into the interior of the inner shell (111). The oil drain pipeline (322) is distributed in the front end cover (12) and the rear end cover (13) and is connected to the oil guide pipeline (321) to drain the oil medium from the front end cover (12) and the rear end cover (13) into the motor housing (11).

6. The composite cooling housing according to claim 5, characterized in that, The oil guide pipe (321) includes an oil inlet pipe section (3211), an axially extending oil guide pipe section (3212), and a first oil outlet pipe section (3213) and a second oil outlet pipe section (3214) arranged at intervals along the axial direction. The oil guide pipe section (3212) is connected to the oil circulation assembly (31) through the oil inlet pipe section (3211), and is connected to the interior of the inner shell (111) through the first oil outlet pipe section (3213) and the second oil outlet pipe section (3214).

7. The composite cooling housing according to claim 5, characterized in that, The oil drain line (322) includes a third oil drain line segment (3221) that passes through the front end cover (12). One end of the third oil drain line segment (3221) is connected to the oil guide line (321), and the other end extends to the end face of the front end cover (12) facing the inside of the motor housing (11).

8. The composite cooling housing according to claim 5, characterized in that, The rear end cover (13) includes an end cover body (131) and a low-pressure cover plate (132) located at the center of the end cover body (131). The oil drain pipe (322) includes a fourth oil drain pipe section (3222) passing through the end cover body (131) and a fifth oil drain pipe section (3223) passing through the low-pressure cover plate (132). One end of the fourth oil drain pipe section (3222) is connected to the oil guide pipe (321), and the other end extends to the end face of the end cover body (131) facing the inside of the motor housing (11). One end of the fifth oil drain pipe section (3223) is connected to the fourth oil drain pipe section (3222), and the other end extends to the end face of the low-pressure cover plate (132) facing the inside of the motor housing (11).

9. The composite cooling housing according to claim 1, characterized in that, The housing assembly (1) further includes an oil collection shell (14) located at the bottom of the motor housing (11) and connected to the motor housing (11). The oil circulation assembly (31) includes a filter element (311), a pump body (312), and a cooling element (313) connected sequentially along the circumference of the motor housing (11). The filter element (311) is connected to the oil collection shell (14), the cooling element (313) is connected to the oil pipeline (32), and the water pipeline (33) passes through the cooling element (313) for cooling the cooling element (313).

10. An electric motor, characterized in that, The motor further includes the composite cooling housing as described in any one of claims 1 to 9, and further includes: The drive assembly (2) includes a stator structure (21), a rotor structure (22), a first bearing (23) and a second bearing (24). The first bearing (23), the stator structure (21) and the second bearing (24) are arranged sequentially along the axial direction on the outer peripheral surface of the rotor structure (22). The first bearing (23) is located close to the front end cover (12) and the second bearing (24) is located close to the rear end cover (13).

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