Oil-cooled motor

Abstract

The invention discloses an oil-cooled motor, and the motor comprises a housing which is of a cylindrical structure; the driving assembly is arranged in the shell and comprises a stator structure and a rotor structure; the circulating assembly is fixedly mounted on the outer side of the shell and used for filtering and cooling the oil medium discharged from the interior of the shell and pumping and injecting the oil medium back into the shell; the oil way assembly comprises a first oil guide pipeline and a second oil guide pipeline which are communicated with the circulation assembly, the first oil guide pipeline is arranged at the end of the shell in a penetrating mode and used for guiding the oil medium to the inner side of the stator structure and the rotor structure, and the second oil guide pipeline is arranged on the circumferential side wall of the shell in a penetrating mode and used for guiding the oil medium to the outer side of the stator structure. According to the oil-cooled motor, the overall integration level of the oil-cooled motor can be improved, and the cooling effect in the motor is improved, so that the motor efficiency is ensured.

Description

Technical Field

[0001] The present application belongs to the field of motor technology, and in particular, relates to an oil-cooled motor. Background Art

[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 the performance of the motor. At present, for commercial vehicles, considering the unsprung mass and layout space, a solution combining an electric drive axle with a water-cooled single motor is usually adopted, but the cooling effect of the water-cooled motor is poor, which limits the further improvement of the motor performance.

[0003] In order to solve the problem of poor cooling effect of water-cooled motors, oil-cooled motors are usually used to replace water-cooled motors to improve the overall cooling efficiency. However, oil-cooled motors require external filtering devices and cooling devices to filter and cool the internal oil medium. These devices will take up a large space, increase the overall volume of the electric drive axle, and require a larger installation space; moreover, the current internal oil circuit setting of oil-cooled motors cannot fully cool the inside of the motor, and can only partially cool it, resulting in low motor efficiency. Summary of the invention

[0004] The present application provides an oil-cooled motor, which can improve the overall integration of the oil-cooled motor and improve the cooling effect inside the motor to ensure the efficiency of the motor.

[0005] The present application provides an oil-cooled motor, which includes: a shell, which is arranged in a columnar structure; a drive assembly, which is arranged inside the shell and includes a stator structure and a rotor structure; a circulation assembly, which is fixedly installed on the outside of the shell and is used to filter and cool the oil medium discharged from the shell and pump it back into the shell; an oil circuit assembly, which includes a first oil guide pipeline and a second oil guide pipeline connected to the circulation assembly, the first oil guide pipeline is passed through the end of the shell and is used to guide the oil medium to the inner side of the stator structure and the rotor structure, and the second oil guide pipeline is passed through the circumferential side wall of the shell and is used to guide the oil medium to the outside of the stator structure.

[0006] As above, the oil-cooled motor, wherein the drive assembly also includes a first bearing and a second bearing installed in the outer casing, the first bearing and the second bearing are respectively close to the two ends of the outer casing, and are used to support the rotor structure; wherein the first oil guide pipeline can also guide the oil medium to the first bearing, and the second oil guide pipeline can extend to the other end of the outer casing to guide the oil medium to the second bearing.

[0007] As above, the oil-cooled motor, wherein the outer shell includes a casing, a first end cover and a second end cover, the casing encloses the outside of the driving assembly and forms a circumferential side wall of the casing, the first end cover is detachably connected to one end of the casing, the second end cover is detachably connected to the other end of the casing, the first bearing is arranged close to the first end cover, and the second bearing is arranged close to the second end cover; wherein the first oil guide pipeline is sequentially arranged through the casing and the first end cover, and the second oil guide pipeline is sequentially arranged through the casing and the second end cover.

[0008] As above, the oil-cooled motor, wherein the first end cover includes a detachably connected end cover body and a center cover plate; the first oil guide pipeline includes a first connecting pipe, a first oil drain pipe and a second oil drain pipe, the circulation component is connected to the first oil drain pipe and the second oil drain pipe through the first connecting pipe, the first oil drain pipe extends from the end cover body to the first bearing, and the second oil drain pipe extends from the center cover plate to the rotor structure.

[0009] As in the oil-cooled motor above, the second oil guide pipeline includes a third oil drain pipeline and a fourth oil drain pipeline, the circulation component is connected to the third oil drain pipeline and the fourth oil drain pipeline, the third oil drain pipeline includes a first sub-oil drain pipeline and a second sub-oil drain pipeline that are connected, the first sub-oil drain pipeline is arranged in the shell, the second sub-oil drain pipeline is arranged in the second end cover, the second bearing is connected to the first sub-oil drain pipeline through the second sub-oil drain pipeline, and the fourth oil drain pipeline extends from the shell to the outside of the stator structure.

[0010] As mentioned above, the stator structure includes a stator core and a stator winding, the stator winding is arranged on the inner side of the stator core, the stator core includes a core body and an oil guide ring connected to both sides of the core body, the oil guide ring is an annular structure, and the oil guide ring has an oil injection hole arranged radially therethrough, which is used to drain the oil medium on the surface of the stator winding to the outer peripheral surface of the stator winding.

[0011] As above, the oil-cooled motor has an oil outlet at the bottom of the shell connected to the circulation component, and there are oil leakage gaps between the drive component and the shell, the first end cover and the second end cover. The oil leakage gap is connected to the oil outlet, and the oil medium used to cool the drive component can leak to the oil outlet through the oil leakage gap.

[0012] As above, the oil-cooled motor, wherein the first oil guide pipeline has a first oil inlet pipeline, the second oil guide pipeline has a second oil inlet pipeline, the first oil inlet pipeline and the second oil inlet pipeline are both passed through the outer shell and connected to the circulation component, the first oil inlet pipeline is also connected to the first end cover, and is used to guide the oil medium in the circulation component to the first end cover and the center cover plate, and the second oil inlet pipeline is also connected to the shell, and is used to guide the oil medium in the circulation component to the shell.

[0013] As above, the oil-cooled motor, wherein the circulation component includes a filter element, a pump body and a cooling element connected to each other, the filter element is connected to the bottom of the outer shell and communicated with the oil outlet, and is used to filter the oil medium discharged from the oil outlet, the cooling element is connected to the first end cover and communicated with the first oil inlet pipeline and the second oil inlet pipeline, and the cooling element is used to cool the filtered oil medium.

[0014] In the oil-cooled motor as above, the second oil guide pipeline also includes a second connecting pipe, the first end of the second connecting pipe is connected to the circulation component, and the second end is connected to the third oil drain pipe and the fourth oil drain pipe. In the axial direction of the stator structure, the second end of the second connecting pipe is arranged in the middle of the stator structure.

[0015] The oil-cooled motor of the present application includes a housing, a drive assembly, a circulation assembly and an oil circuit assembly. The drive assembly is arranged in the housing, including a stator structure and a rotor structure that are mutually nested. The overall extension direction of the stator structure and the rotor structure can be the same as the extension direction of the housing of the columnar structure, so the shape of the housing can ensure that the movement of the drive assembly is not interfered. The circulation assembly is fixedly installed on the outside of the housing, and is connected to the drive assembly in the housing through the first oil guide pipeline and the second oil guide pipeline of the oil circuit assembly, so that the oil medium can be cooled inside the housing and circulated outside the housing. The fixed arrangement of the circulation assembly on the outside of the housing and the arrangement of the oil circuit assembly penetrating from the outside of the housing into the housing and communicating with the drive assembly can enable the oil-cooled motor itself to realize the functions of filtering, cooling and pumping circulation, without the need for an external circulation device to perform circulation steps such as filtering and cooling the oil medium, thereby improving the overall integration and reducing the overall occupied space.

[0016] In addition, the first oil guide pipeline of the oil circuit assembly is penetrated at the end of the outer shell, so that the oil medium reaches the end position of the rotor structure after passing through the first oil guide pipeline, and flows from the end to the center position along the extension direction of the rotor structure, thereby cooling the inner surface of the rotor structure and the stator structure. The second oil guide pipeline is penetrated at the circumferential side wall of the outer shell. After passing through the second oil guide pipeline, the oil medium can directly reach the outer peripheral surface of the stator structure to cool the outer surface of the stator structure, thereby realizing comprehensive cooling of the rotor structure and the inside and outside of the stator structure, improving the cooling effect inside the motor, and ensuring the motor efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solution of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0018] Figure 1 This is a schematic diagram of the external structure of the oil-cooled motor according to an embodiment of the present application;

[0019] Figure 2 A schematic diagram of a first oil-conducting pipeline inside an oil-cooled motor according to an embodiment of the present application;

[0020] Figure 3 A cross-sectional view from a top view of the oil-cooled motor according to an embodiment of the present application;

[0021] Figure 4 A schematic diagram of a second oil-conducting pipeline inside an oil-cooled motor according to an embodiment of the present application;

[0022] Figure 5 A cross-sectional view from a front view of the oil-cooled motor according to an embodiment of the present application;

[0023] Figure 6 Schematic diagram of the stator structure of the oil-cooled motor according to an embodiment of the present application.

[0024] Description of Figure Numbers:

[0025] 10. housing; 11. shell; 111. oil outlet; 112. oil leakage gap; 12. first end cover; 121. end cover body; 122. center cover plate; 13. second end cover;

[0026] 20. Drive assembly; 21. Stator structure; 211. Stator core; 212. Stator winding; 213. Core body; 214. Oil guide ring; 215. Oil injection hole; 22. Rotor structure; 221. Oil throwing hole; 23. First bearing; 24. Second bearing;

[0027] 30. Circulation component; 31. Filter element; 32. Pump body; 33. Cooling element;

[0028] 40. Oil circuit assembly; 41. First oil guide pipeline; 411. First connecting pipeline; 412. First oil discharge pipeline; 413. Second oil discharge pipeline; 414. First oil inlet pipeline; 42. Second oil guide pipeline; 421. Third oil discharge pipeline; 422. Fourth oil discharge pipeline; 423. First sub-oil discharge pipeline; 424. Second sub-oil discharge pipeline; 425. Second oil inlet pipeline; 426. Second connecting pipeline. DETAILED DESCRIPTION

[0029] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present application, rather than to limit the present application. For those skilled in the art, the present application can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by illustrating the examples of the present application.

[0030] At present, in heavy-duty vehicles, a combination of electric drive axles and water-cooled motors is usually used. Compared with oil-cooled motors, water-cooled motors have poor cooling effects. However, if an oil-cooled motor is used, external filtering devices and cooling devices are required to filter and cool the internal oil medium. These devices will occupy a large space, increase the overall volume of the electric drive axle, and require a larger installation space. For heavy-duty vehicles, the increase in the overall volume and weight of the electric drive axle will further increase the unsprung mass, which will have a certain impact on the vehicle's handling, driving stability, and suspension system. Moreover, the current internal oil circuit setting of the oil-cooled motor cannot fully cool the inside of the motor, and can only partially cool it, resulting in low motor efficiency.

[0031] Therefore, in the design of the motor of the vehicle, it is necessary to comprehensively consider the overall weight, volume and cooling effect of the motor. The embodiment of the present application provides an oil-cooled motor, which can improve the overall integration of the oil-cooled motor, reduce the overall occupied space of the oil-cooled motor, and improve the cooling effect inside the motor to ensure the motor efficiency.

[0032] like Figures 1 to 6 As shown, an embodiment of the present application provides an oil-cooled motor, which includes: a shell 10, which is arranged in a columnar structure; a drive assembly 20, which is arranged inside the shell 10, including a stator structure 21 and a rotor structure 22; a circulation assembly 30, which is fixedly installed on the outside of the shell 10, and is used to filter and cool the oil medium discharged from the shell 10 and pump it back into the shell 10; an oil circuit assembly 40, including a first oil guide pipeline 41 and a second oil guide pipeline 42 connected to the circulation assembly 30, the first oil guide pipeline 41 is penetrated through the end of the shell 10, and is used to guide the oil medium to the inner side of the stator structure 21 and the rotor structure 22, and the second oil guide pipeline 42 is penetrated through the circumferential side wall of the shell 10, and is used to guide the oil medium to the outside of the stator structure 21.

[0033] Figure 1 FIG. 4 shows a portion of the first oil-conducting pipeline 41 and the second oil-conducting pipeline 42 outside the housing 10 . Figure 2 FIG. 4 shows a partial pipeline of the first oil-conducting pipeline 41 inside the housing 10. Figure 4A partial pipeline of the second oil-conducting pipeline 42 inside the housing 10 is shown.

[0034] It should be noted that the columnar structure of the housing 10 includes but is not limited to structures such as a cylinder and a polygonal column. In the embodiment of the present application, it is specifically cylindrical. The cylindrical housing 10 is suitable for the rotatable drive component 20 to be installed inside.

[0035] In specific implementation, the oil-cooled motor of the embodiment of the present application includes a housing 10, a drive assembly 20, a circulation assembly 30 and an oil circuit assembly 40. The drive assembly 20 is arranged in the housing 10, and includes a stator structure 21 and a rotor structure 22 which are mutually nested. The overall extension direction of the stator structure 21 and the rotor structure 22 can be the same as the extension direction of the housing 10 of the columnar structure. Therefore, the shape setting of the housing 10 can ensure that the movement of the drive assembly 20 is not interfered. The circulation assembly 30 is fixedly installed on the outside of the housing 10, and is connected to the drive assembly 20 in the housing 10 through the first oil guide line 41 and the second oil guide line 42 of the oil circuit assembly 40, so that the oil medium can cool the drive assembly 20 inside the housing 10 and circulate outside the housing 10. The fixed setting of the circulation component 30 on the outside of the shell 10 and the setting of the oil circuit component 40 penetrating from the outside of the shell 10 into the shell 10 and communicating with the drive component 20 can enable the oil-cooled motor itself to realize the functions of filtering, cooling and pumping circulation, without the need for an external circulation device to perform circulation steps such as filtering and cooling of the oil medium, thereby improving the overall integration and reducing the overall occupied space.

[0036] In addition, the first oil guide pipe 41 of the oil circuit assembly 40 is penetrated at the end of the outer shell 10, so that the oil medium reaches the end position of the rotor structure 22 after passing through the first oil guide pipe 41, and flows from the end to the center position along the extension direction of the rotor structure 22, thereby cooling the inner surface of the rotor structure 22 and the stator structure 21. The second oil guide pipe 42 is penetrated at the circumferential side wall of the outer shell 10. After passing through the second oil guide pipe 42, the oil medium can directly reach the outer peripheral surface of the stator structure 21 to cool the outer surface of the stator structure 21, thereby achieving comprehensive cooling of the inside and outside of the rotor structure 22 and the stator structure 21, improving the cooling effect inside the motor, ensuring the motor efficiency, and the effective cooling of the rotor structure 22 can reduce the risk of magnetic steel demagnetization and ensure the continuous power of the motor.

[0037] Specifically, the stator structure 21 is an annular columnar structure, and the rotor structure 22 is rotatably disposed inside the stator structure 21 . The rotational cooperation between the rotor structure 22 and the stator structure 21 can achieve the driving effect of the oil-cooled motor.

[0038] like Figures 2 to 5As shown, the oil-cooled motor of an embodiment of the present application, wherein the drive assembly 20 also includes a first bearing 23 and a second bearing 24 installed in the housing 10, and the first bearing 23 and the second bearing 24 are respectively close to the two ends of the housing 10, for supporting the rotor structure 22; wherein the first oil guide line 41 can also guide the oil medium to the first bearing 23, and the second oil guide line 42 can extend to the other end of the housing 10 to guide the oil medium to the second bearing 24.

[0039] In specific implementation, the first bearing 23 and the second bearing 24 are both arranged inside the housing 10 and located near the two ends of the housing 10, which can support the two ends of the rotor structure 22 so that the rotor structure 22 can rotate stably and ensure the movement accuracy of the oil-cooled motor.

[0040] During the rotation of the rotor structure 22, a certain amount of heat will be generated at the first bearing 23 and the second bearing 24. The first oil guide pipe 41 can guide the oil medium to the first bearing 23 close to one end of the housing 10 to cool the first bearing 23, and the second oil guide pipe 42 can guide the oil medium to the second bearing 24 to cool the second bearing 24, thereby completing the cooling of the bearing structure inside the motor that is prone to heat, further improving the cooling effect inside the motor, and further improving the working efficiency of the motor. In addition, the oil medium can also lubricate the first bearing 23 and the second bearing 24, improving the reliability of the first bearing 23 and the second bearing 24.

[0041] Moreover, by extending the first oil guide line 41 to the first bearing 23 near one end of the outer casing 10, and extending the second oil guide line 42 to the second bearing 24 near the other end of the outer casing 10, a reasonable distribution of the internal oil guide line routes is achieved, avoiding the intersection of oil circuits, facilitating the setting and installation of the overall oil circuit, and reducing the manufacturing difficulty of the oil-cooled motor.

[0042] like Figures 1 to 5 As shown, an oil-cooled motor of an embodiment of the present application, wherein the housing 10 includes a shell 11, a first end cover 12 and a second end cover 13, the shell 11 encloses the outside of the drive assembly 20 and forms a circumferential side wall of the shell 10, the first end cover 12 is detachably connected to one end of the shell 11, the second end cover 13 is detachably connected to the other end of the shell 11, the first bearing 23 is arranged close to the first end cover 12, and the second bearing 24 is arranged close to the second end cover 13; wherein the first oil guide line 41 is sequentially penetrated through the shell 11 and the first end cover 12, and the second oil guide line 42 is sequentially penetrated through the shell 11 and the second end cover 13.

[0043] In specific implementation, the shell 11 of the housing 10 surrounds and encloses the outside of the drive assembly 20, and can form the circumferential side wall of the housing 10. The first end cover 12 and the second end cover 13 of the housing 10 are respectively detachably connected to the two ends of the shell 11, and together with the shell 11, form a closed structure. When the internal drive assembly 20 and part of the oil circuit assembly 40 need to be replaced and repaired, the operation can be performed by removing the first end cover 12 or the second end cover 13. Optionally, the housing 10 can adopt a solution of providing an end cover at one end of the shell 11 and sealing the other end, or a solution of butt-connecting two shells 11 with one end open, both of which can form an overall closed structure of the housing 10.

[0044] The first oil guide line 41 is sequentially arranged in the housing 11 and the first end cover 12. After the oil medium reaches the position of the first end cover 12 from the housing 11, it can reach the end of the rotor structure 22 and the first bearing 23 respectively, so as to cool the rotor structure 22, the inner side of the stator structure 21 and the first bearing 23; the second oil guide line 42 is sequentially arranged in the housing 11 and the second end cover 13, and can reach the outer side of the stator structure 21 and the second bearing 24 respectively, so as to cool the two. Therefore, the distribution of the first oil guide line 41 and the second oil guide line 42 at different positions in the housing 10 can fully cool the internal structure of the motor, ensure the cooling effect inside the motor, and further improve the working efficiency of the motor.

[0045] like Figure 2 and Figure 3 As shown, an oil-cooled motor in an embodiment of the present application, wherein the first end cover 12 includes a detachably connected end cover body 121 and a center cover plate 122; the first oil guide pipeline 41 includes a first connecting pipe 411, a first oil drain pipe 412 and a second oil drain pipe 413, the circulation component 30 is connected to the first oil drain pipe 412 and the second oil drain pipe 413 through the first connecting pipe 411, the first oil drain pipe 412 extends from the end cover body 121 to the first bearing 23, and the second oil drain pipe 413 extends from the center cover plate 122 to the rotor structure 22.

[0046] Moreover, the first oil guide pipeline 41 also has a first oil inlet pipe 414, which is penetrated by the outer shell 10, one end of which is connected to the circulation component 30, and the other end is connected to the first connecting pipe 411 in the first end cover 12, so as to guide the oil medium output by the circulation component 30 to the first end cover 12 and the center cover plate 122 through the first connecting pipe 411.

[0047] Specifically, the portion of the first oil inlet pipe 414 inside the shell 11 extends along the axial direction of the entire outer shell 10, the first connecting pipe 411 and the first oil discharge pipe 412 both extend along the radial direction of the outer shell 10, and the second oil discharge pipe 413 has three sections of bent and connected pipes, the first section is connected to the first connecting pipe 411, the second section is perpendicular to the first section and is integrally arranged in the center cover plate 122, and the third section is perpendicular to the second section and is connected to the end of the rotor structure 22.

[0048] In specific implementation, the circulation component 30 inputs the oil medium into the first oil inlet pipeline 414. After passing through the first oil inlet pipeline 414, the oil medium enters the first connecting pipeline 411 in the first end cover 12, and is divided into the first oil discharge pipeline 412 in the end cover body 121 and the second oil discharge pipeline 413 in the center cover plate 122, so as to cool the first bearing 23 and the rotor structure 22 respectively. The arrangement of the first oil discharge pipeline 412 in the end cover body 121 and the arrangement of the second oil discharge pipeline 413 in the center cover plate 122 prevents interference between the first oil discharge pipeline 412 and the second oil discharge pipeline 413, and enables the oil medium to accurately reach the end positions of the first bearing 23 and the rotor structure 22, cools the inner surface of the first bearing 23, the rotor structure 22 and the stator structure 21, and ensures the cooling effect.

[0049] Specifically, Figure 5 As shown, the rotor structure 22 is an internally hollow shaft structure, and the end of the second oil discharge pipe 413 is connected to the interior of the rotor structure 22. The rotor structure 22 is provided with oil-throwing holes 221 along its own radial direction. After the second oil discharge pipe 413 discharges the oil medium into the interior of the rotor structure 22, the rotation of the rotor structure 22 can throw the internal oil medium out from the oil-throwing holes 221 and inject it into the inner side of the stator structure 21, thereby achieving cooling of the rotor structure 22 and the inner side of the stator structure 21, and achieving the effect of cooling the interior of the drive component 20.

[0050] In addition, the oil-swinging hole 221 is arranged close to the end of the rotor structure 22 , and can be opposite to the part of the stator winding 212 protruding from the core body 213 , so that the oil medium can cool this part of the stator winding 212 and improve the cooling effect on the stator structure 21 .

[0051] Optionally, the second oil discharge pipe 413 may also directly discharge the oil medium to the gap between the rotor structure 22 and the inner side of the stator structure 21 , thereby cooling the inner sides of the rotor structure 22 and the stator structure 21 simultaneously.

[0052] like Figure 4 and Figure 5As shown, the oil-cooled motor of the embodiment of the present application, wherein the second oil guide pipeline 42 includes a third oil drain pipeline 421 and a fourth oil drain pipeline 422, the circulation component 30 is connected to the third oil drain pipeline 421 and the fourth oil drain pipeline 422, the third oil drain pipeline 421 includes a first sub-oil drain pipeline 423 and a second sub-oil drain pipeline 424 that are connected, the first sub-oil drain pipeline 423 is arranged in the shell 11, the second sub-oil drain pipeline 424 is arranged in the second end cover 13, the second bearing 24 is connected to the first sub-oil drain pipeline 423 through the second sub-oil drain pipeline 424, and the fourth oil drain pipeline 422 extends from the shell 11 to the outside of the stator structure 21.

[0053] Moreover, the second oil guide pipeline 42 also has a second oil inlet pipeline 425 and a second connecting pipeline 426. The second oil inlet pipeline 425 is penetrated through the outer shell 10, one end of which is connected to the circulation component 30, and the other end is connected to the second connecting pipeline 426. Since the other end of the second connecting pipeline 426 is connected to the third oil discharge pipeline 421 and the fourth oil discharge pipeline 422, the second oil inlet pipeline 425 is respectively connected to the third oil discharge pipeline 421 and the fourth oil discharge pipeline 422 through the second connecting pipeline 426.

[0054] During specific implementation, the circulation component 30 inputs the oil medium into the second oil inlet pipe 425. After passing through the second oil inlet pipe 425, the oil medium enters the second connecting pipe 426 in the second end cover 13, and is diverted to the third oil discharge pipe 421 and the fourth oil discharge pipe 422. After entering the third oil discharge pipe 421, the oil medium can pass through the first sub-oil discharge pipe 423 in the shell 11 and the second sub-oil discharge pipe 424 in the second end cover 13 in sequence, and finally reach the second bearing 24 for cooling; after the oil medium in the second connecting pipe 426 enters the fourth oil discharge pipe 422, it can reach the outside of the stator structure 21 and cool it.

[0055] Therefore, the arrangement of the first sub-oil drain pipe 423 of the third oil drain pipe 421 in the shell 11 and the second sub-oil drain pipe 424 in the second end cover 13, and the arrangement of the fourth oil drain pipe 422 passing through the shell 11 to the outside of the stator structure 21, prevent interference between the third oil drain pipe 421 and the fourth oil drain pipe 422, and enable the oil medium to accurately reach the outer position of the second bearing 24 and the stator structure 21, thereby cooling the outer surfaces of the second bearing 24 and the stator structure 21 and ensuring the cooling effect.

[0056] Specifically, the first end of the second connecting pipe 426 is connected to the circulation component 30 through the second oil inlet pipe 425, and the second end is connected to the fourth oil discharge pipe 422. In the axial direction of the stator structure 21, the second end of the second connecting pipe 426 is arranged in the middle of the stator structure 21, and the fourth oil discharge pipe 422 connected thereto is also arranged in the middle of the stator structure 21. Such an arrangement can guide the oil medium to the middle of the stator structure 21, thereby realizing the diffusion of the oil medium from the middle to the two ends of the stator structure 21, so that the outer surface of the stator structure 21 can be completely cooled, thereby improving the overall cooling effect.

[0057] Specifically, the first sub-oil drain pipe 423 extends axially along the housing 10 , the second sub-oil drain pipe 424 extends radially along the housing 10 , and the fourth oil drain pipe 422 radially penetrates the housing 11 to reach the outer surface of the stator structure 21 .

[0058] like Figure 5 and Figure 6 As shown, an oil-cooled motor in an embodiment of the present application, wherein the stator structure 21 includes a stator core 211 and a stator winding 212, the stator winding 212 is arranged on the inner side of the stator core 211, the stator core 211 includes a core body 213 and oil guide rings 214 connected to both sides of the core body 213, the oil guide rings 214 are all annular structures, and the oil guide rings 214 have oil injection holes 215 arranged radially therethrough, which are used to drain the oil medium on the surface of the stator winding 212 to the outer peripheral surface of the stator winding 212.

[0059] During specific implementation, the fourth oil discharge pipe 422 guides the oil medium to the outer surface of the stator structure 21. Since the stator core 211 is arranged on the outer side of the stator structure 21 as a whole, the oil medium can reach the outer surface of the stator core 211, flow from the core body 213 to the oil guide ring 214, and guide to the outer peripheral surface of the stator winding 212 through the oil injection hole 215 penetrating the oil guide ring 214, so as to cool the outer peripheral surface of the stator winding 212, thereby achieving complete cooling of the outer surfaces of the stator core 211 and the stator winding 212, and the two oil guide rings 214 on both sides of the core body 213 can cool the part of the stator winding 212 protruding from the core body 213 at both ends, thereby ensuring the cooling area for the stator winding 212, thereby ensuring the cooling effect for the stator structure 21 as a whole.

[0060] like Figure 5 As shown, the oil-cooled motor of the embodiment of the present application has an oil outlet 111 connected to the circulation component 30 at the bottom of the shell 11, and an oil leakage gap 112 is provided between the drive component 20 and the shell 11, the first end cover 12 and the second end cover 13. The oil leakage gap 112 is connected to the oil outlet 111, and the oil medium used to cool the drive component 20 can leak to the oil outlet 111 through the oil leakage gap 112.

[0061] During specific implementation, after the oil medium cools the drive component 20 through the oil circuit component 40, the oil medium with a higher temperature can enter the oil leakage gap 112 under the action of gravity or the rotation of the drive component 20, and continue to pass through the oil leakage gap 112 under the action of gravity to reach the oil outlet 111 at the bottom of the shell 11, and finally enter the circulation component 30 connected to the oil outlet 111 for circulation.

[0062] like Figure 1 As shown, an oil-cooled motor in an embodiment of the present application, wherein the circulation component 30 includes a filter element 31, a pump body 32 and a cooling element 33 connected to each other, the filter element 31 is connected to the bottom of the housing 10 and communicates with the oil outlet 111, and is used to filter the oil medium discharged from the oil outlet 111, the cooling element 33 is connected to the first end cover 12 and is connected to the first oil inlet pipe 414 and the second oil inlet pipe 425, and the cooling element 33 is used to cool the filtered oil medium.

[0063] During specific implementation, after the oil medium cools various parts of the drive assembly 20 inside the housing 10, the overall temperature is high and contains impurities. The oil medium reaches the oil outlet 111 under the action of gravity and enters the filter element 31 connected to the oil outlet 111 to filter impurities. The filtered oil medium enters the cooling element 33 under the pumping action of the pump body to be cooled to reduce the temperature so that the oil medium meets the cooling requirements. Finally, the cooled oil medium enters the housing 10 through the first oil inlet pipe 414 and the second oil inlet pipe 425 to cool the drive assembly 20, thereby completing the overall circulation and cooling process.

[0064] The filter element 31 is arranged at the bottom of the outer shell 10, which ensures that the filter element 31 can directly receive the oil medium discharged from the oil outlet 111. The cooling element 33 is connected to the first end cover 12, and the pump body 32 is arranged between the two, so that the circulation component 30 is arranged around the outer side of part of the outer shell 10 as a whole, thereby improving the overall integration of the oil-cooled motor and reducing the overall occupied space.

[0065] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "include..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0066] The above is only a specific implementation of the present application. Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working processes of the systems, modules and units described above can refer to the corresponding processes in the aforementioned method embodiments, and will not be repeated here. It should be understood that the protection scope of the present application is not limited to this. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in this application, and these modifications or replacements should be included in the protection scope of this application.

Claims

1. An oil-cooled motor, characterized in that: include: The outer shell is arranged in a columnar structure; A driving assembly, disposed inside the housing, comprising a stator structure and a rotor structure; A circulation assembly, fixedly mounted on the outer side of the housing, for filtering and cooling the oil medium discharged from the housing and pumping it back into the housing; The oil circuit assembly includes a first oil guide pipeline and a second oil guide pipeline connected to the circulation assembly, wherein the first oil guide pipeline is arranged through the end of the shell and is used to guide the oil medium to the inner side of the stator structure and the rotor structure, and the second oil guide pipeline is arranged through the circumferential side wall of the shell and is used to guide the oil medium to the outer side of the stator structure.

2. The oil-cooled motor according to claim 1, characterized in that: The drive assembly further includes a first bearing and a second bearing installed in the housing, wherein the first bearing and the second bearing are respectively close to two ends of the housing and are used to support the rotor structure; The first oil guide pipeline can also guide the oil medium to the first bearing, and the second oil guide pipeline can extend to the other end of the housing to guide the oil medium to the second bearing.

3. The oil-cooled motor according to claim 2, characterized in that: The housing comprises a shell, a first end cover and a second end cover, the shell is enclosed outside the drive assembly and forms a circumferential side wall of the shell, the first end cover is detachably connected to one end of the shell, the second end cover is detachably connected to the other end of the shell, the first bearing is arranged close to the first end cover, and the second bearing is arranged close to the second end cover; The first oil guide pipeline is sequentially provided through the shell and the first end cover, and the second oil guide pipeline is sequentially provided through the shell and the second end cover.

4. The oil-cooled motor according to claim 3, characterized in that: The first end cover comprises an end cover body and a center cover plate which are detachably connected; The first oil guide pipeline includes a first connecting pipeline, a first oil drain pipeline and a second oil drain pipeline. The circulation component is connected to the first oil drain pipeline and the second oil drain pipeline through the first connecting pipeline. The first oil drain pipeline extends from the end cover body to the first bearing, and the second oil drain pipeline extends from the center cover plate to the rotor structure.

5. The oil-cooled motor according to claim 3, characterized in that: The second oil guiding pipeline includes a third oil drain pipeline and a fourth oil drain pipeline, the circulation component is connected with the third oil drain pipeline and the fourth oil drain pipeline, the third oil drain pipeline includes a first sub-oil drain pipeline and a second sub-oil drain pipeline that are connected, the first sub-oil drain pipeline is arranged in the shell, the second sub-oil drain pipeline is arranged in the second end cover, the second bearing is connected with the first sub-oil drain pipeline through the second sub-oil drain pipeline, and the fourth oil drain pipeline extends from the shell to the outside of the stator structure.

6. The oil-cooled motor according to claim 3, characterized in that: The stator structure includes a stator core and a stator winding, wherein the stator winding is arranged on the inner side of the stator core, and the stator core includes a core body and an oil guide ring connected to both sides of the core body. The oil guide ring is an annular structure and has oil injection holes radially extending therethrough for discharging the oil medium on the surface of the stator winding to the outer peripheral surface of the stator winding.

7. The oil-cooled motor according to claim 4, characterized in that: The bottom of the shell has an oil outlet connected to the circulation component, and the drive component and the shell, the first end cover and the second end cover have oil leakage gaps, and the oil leakage gaps are connected to the oil outlet, so that the oil medium used to cool the drive component can leak to the oil outlet through the oil leakage gaps.

8. The oil-cooled motor according to claim 7, characterized in that: The first oil guide pipeline has a first oil inlet pipeline, and the second oil guide pipeline has a second oil inlet pipeline. The first oil inlet pipeline and the second oil inlet pipeline are both arranged in the outer shell and are connected with the circulation component. The first oil inlet pipeline is also connected to the first end cover, and is used to guide the oil medium in the circulation component to the first end cover and the center cover plate. The second oil inlet pipeline is also connected to the shell, and is used to guide the oil medium in the circulation component to the shell.

9. The oil-cooled motor according to claim 8, characterized in that: The circulation component includes a filter element, a pump body and a cooling element connected to each other. The filter element is connected to the bottom of the housing and communicated with the oil outlet, and is used to filter the oil medium discharged from the oil outlet. The cooling element is connected to the first end cover and communicated with the first oil inlet pipeline and the second oil inlet pipeline, and the cooling element is used to cool the filtered oil medium.

10. The oil-cooled motor according to claim 5, characterized in that: The second oil guide pipeline also includes a second connecting pipe, a first end of the second connecting pipe is connected to the circulation component, and a second end is connected to the third oil discharge pipe and the fourth oil discharge pipe. In the axial direction of the stator structure, the second end of the second connecting pipe is arranged in the middle of the stator structure.

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