Motor cooling structure, motor, automobile

Abstract

The present invention provides a motor cooling structure, a motor, and a car, wherein the motor cooling structure includes a motor housing, an axial oil passage is constructed on the motor housing, the axial oil passage is connected to the flow path of an external cooling oil supply component, and an oil spraying member is provided at least at one axial end of the axial oil passage, the oil spraying member has a first oil spraying port, and the first oil spraying port can spray the cooling oil in the axial oil passage onto the axial end of the stator coil corresponding thereto. According to the motor cooling structure, the motor, and the car of the present invention, the oil spraying member can spray the cooling oil onto the axial end of at least one side of the stator coil, thereby achieving efficient cooling of the axial end of the stator coil and improving the cooling effect of the motor.

Description

Technical Field

[0001] The invention relates to the technical field of motor manufacturing, and in particular to a motor cooling structure, a motor and a car. Background Art

[0002] As the power output component of new energy vehicles, the main drive motor is one of the most core components of new energy vehicles, especially pure electric vehicles. The main drive motor is the only power source. Its performance, weight and volume directly affect the operation of the vehicle, the design layout of the frame and chassis, etc. With the rapid growth of the global car ownership, the pressure on energy, environment and safety is increasing. From the perspective of sustainable development, many countries have proposed the development goals of low-carbon, electrified and intelligent vehicles, and have accelerated the transformation and reform of the automotive industry under the background of new generation information technology and clean energy technology by strengthening technological innovation, cross-industry collaborative integration and other plans.

[0003] my country has clear requirements for the development of new energy vehicle technology. In the national strategic emerging industry planning, specific performance indicators of important automotive components have been defined, such as the power density and torque density of the main drive motor. From the perspective of the main vehicle manufacturers, in order to increase the vehicle's cruising range, the weight and volume of the main drive motor are required to be smaller and smaller so as to reduce the weight of the entire vehicle. In addition, more batteries can be arranged. In addition, cost pressures such as market competition and subsidy adjustments also require the main drive motor to develop in the direction of smaller size, lighter weight and lower cost.

[0004] At present, the solutions adopted by various manufacturers to reduce the volume and save costs are mainly to increase the motor speed and improve the cooling conditions to increase the power density. Increasing the motor speed is limited by factors such as bearings, oil seals and the speed ratio of the matching reducer, which often produces more negative effects. In terms of improving cooling conditions, the main problems of the current structure are:

[0005] 1. Water cooling cannot directly contact the heat source, so the heat transferred to the casing is taken away by cooling water, and the cooling effect is limited;

[0006] 2. The measure of improving heat transfer efficiency by filling thermal conductive materials is not suitable for mass production due to factors such as material cost and complex process.

[0007] 3. The oil cooling scheme has more advantages than the above two traditional schemes and is favored by the industry. However, the current oil cooling scheme has a complex oil circuit structure and an unreasonable oil circuit flow structure. On the one hand, this increases the processing cost. On the other hand, the unreasonable oil circuit limits the optimization of the oil cooling effect, or squeezes the space of other motor components and ultimately affects the performance of the whole machine. More importantly, in the prior art, the motor stator core, rotor core and bearings are often used as the main heat source, and corresponding cooling measures are taken and corresponding cooling systems are designed, but the adverse effect of the stator coil as a heat source on the heat dissipation of the motor is ignored. Based on this, the present invention is proposed. Summary of the invention

[0008] Therefore, the technical problem to be solved by the present invention is to provide a motor cooling structure, a motor, and a vehicle, wherein the oil spray part can spray cooling oil on the axial end of at least one side of the stator coil, thereby achieving efficient cooling of the axial end of the stator coil and improving the cooling effect of the motor.

[0009] In order to solve the above problems, the present invention provides a motor cooling structure, including a motor casing, an axial oil passage is constructed on the motor casing, the axial oil passage is connected to the flow path of an external cooling oil supply component, at least one axial end of the axial oil passage is provided with an oil spray part, the oil spray part has a first oil spray port, and the first oil spray port can spray the cooling oil in the axial oil passage onto the axial end of the stator coil corresponding thereto.

[0010] Preferably, the oil spraying member comprises an annular body, the outer peripheral wall of the annular body is provided with a first annular oil collecting groove, and the first oil spraying port is located on a side vertical wall of the first annular oil collecting groove.

[0011] Preferably, there are a plurality of the first oil injection ports, the plurality of the first oil injection ports are arranged at intervals along the circumferential direction of the annular body, and the diameter of the distribution pitch circle of the plurality of the first oil injection ports is larger than the outer circle diameter of the stator coil.

[0012] Preferably, the diameters of the plurality of first fuel injection ports are different.

[0013] Preferably, a positioning protrusion is constructed on the other side wall of the first annular oil collecting groove, and corresponding positioning grooves are provided at the corresponding ends of the motor housing and the oil spray component. The positioning protrusion can be embedded in the positioning groove to realize the assembly connection between the oil spray component and the motor housing.

[0014] Preferably, the axial oil passage has a plurality of them, and the plurality of the axial oil passages are spaced apart along the circumference of the motor housing; and / or, the axial oil passage has a first wall and a second wall spaced apart along the radial direction of the motor housing, the one side vertical wall and the other side vertical wall respectively correspond to the second wall and abut against the first wall, a second seal is sandwiched between the one side vertical wall and the second wall, and / or a first seal is sandwiched between the other side vertical wall and the first wall.

[0015] Preferably, a circumferential oil passage is also constructed on the motor housing, and the circumferential oil passage passes through the plurality of axial oil passages along the circumference of the motor housing.

[0016] Preferably, the circumferential oil passage has an opening on a side facing the stator core.

[0017] Preferably, a second oil spray port is provided on the other side wall of the first annular oil collecting groove, and the second oil spray port can spray the cooling oil in the axial oil channel onto the motor end cover corresponding thereto.

[0018] The present invention also provides a motor, comprising the motor cooling structure mentioned above.

[0019] The present invention also provides a car, comprising a main drive motor, wherein the main drive motor is the above-mentioned motor.

[0020] The present invention provides a motor cooling structure, a motor, and a vehicle. By arranging the oil spraying member, the cooling oil in the axial oil channel can be sprayed onto the axial end of the stator coil corresponding to the axial end of the stator coil, thereby realizing efficient cooling of the axial end of the stator coil, and effectively compensating for the deficiency of the prior art that the cooling of the motor housing, the stator core or the rotor assembly is mostly targeted, but the end of the stator coil cannot be effectively cooled, resulting in poor cooling effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of the internal structure of a motor cooling structure according to an embodiment of the present invention;

[0022] Figure 2 for Figure 1 A partial schematic diagram of the flow path of the cooling oil;

[0023] Figure 3 for Figure 2 A partial enlarged view of the middle A;

[0024] Figure 4 for Figure 1 Schematic diagram of the three-dimensional structure of the motor housing;

[0025] Figure 5 for Figure 4 A partial enlarged view of point B in the middle;

[0026] Figure 6 for Figure 4 A partial cross-sectional view of the motor housing;

[0027] Figure 7 A schematic diagram of the internal structure of a motor cooling structure according to an embodiment of the present invention;

[0028] Figure 8 for Figure 7 A partial enlarged view of point C in the middle;

[0029] Fig. 9 for Figure 7 A partial enlarged view of point D in the middle;

[0030] Fig.10 for Figure 7 A partial enlarged view of point E in the middle;

[0031] Fig.11 for Figure 1 Schematic diagram of the three-dimensional structure of the fuel injection part;

[0032] Fig.12 for Fig.11 A schematic diagram of the three-dimensional structure of the fuel injection part from another perspective;

[0033] Fig.13 for Figure 1 A schematic diagram of a three-dimensional structure of an implementation method of a middle end cover;

[0034] Fig.14 for Fig.13 A schematic diagram of the partial cross-sectional structure of the middle end cover;

[0035] Fig.15 for Figure 1 A schematic diagram of a three-dimensional structure of another embodiment of the middle end cover;

[0036] Fig.16 for Figure 1 A schematic diagram of a three-dimensional structure of another embodiment of the middle end cover;

[0037] Fig.17 for Figure 1 A schematic diagram of the three-dimensional structure of the first outer pressure plate;

[0038] Fig.18 for Fig.17 A schematic diagram of a partial cross-section structure of the first outer pressure plate;

[0039] Fig.19 for Figure 1 A schematic diagram of the three-dimensional structure of the first inner pressure plate or the second inner pressure plate;

[0040] Fig. 20 for Fig.19 A schematic diagram of a partial cross-sectional structure of the first inner pressure plate or the second inner pressure plate;

[0041] Fig.21 for Figure 1 A schematic diagram of the three-dimensional structure of the first inner pressure plate or the second inner pressure plate in another embodiment.

[0042] The reference numerals are as follows:

[0043] 1. Motor housing; 11. Axial oil passage; 111. First wall; 112. Second wall; 12. Positioning groove; 121. First seal; 122. Second seal; 13. Circumferential oil passage; 14. Oil inlet passage; 15. Second oil return groove; 2. Oil spraying member; 211. First oil spraying port; 212. Second oil spraying port; 22. Annular body; 23. First annular oil collecting groove; 231. One side wall; 232. The other side wall; 24. Positioning protrusion; 31. Motor end cover; 311. Bearing chamber; 312. First bearing guide channel; 313. Drainage hole; 314. Second bearing guide channel; 315. Cover plate; 316. First oil return groove; 41. Guide member; 411. Guide slope; 412. Oil retaining rib; 413. Oil guide groove; 51. First A core pressure plate; 511, a first rotor core cooling oil channel; 5111, a first alignment ring groove; 512, a first pressure plate oil collecting ring groove; 513, a second rotor core cooling oil channel; 5131, a second alignment ring groove; -514, a first outer pressure plate; 515, a first inner pressure plate; 5151, a groove; 516, an oil guide rib; 52, a second core pressure plate; 521, a third rotor core cooling oil channel; 5211, a third alignment ring groove; 522, a second pressure plate oil collecting ring groove; 523, a second outer pressure plate; 524, a second inner pressure plate; 100, a stator coil; 101, a stator core; 102, a motor rotor; 103, a rotor core; 1031, a first through-hole; 1032, a second through-hole; 104, a rotating shaft; 105, a bearing; 106, a shaft seal. DETAILED DESCRIPTION

[0044] See also Figures 1 to 21As shown, the arrow in the figure shows the flow direction of the cooling oil in the cooling structure. According to an embodiment of the present invention, a motor cooling structure is provided, in particular, a cooling structure suitable for a motor with a horizontal housing, comprising a motor housing 1, an axial oil passage 11 is constructed on the motor housing 1, the axial oil passage 11 is connected to the flow path of an external cooling oil supply component, and at least one axial end of the axial oil passage 11 is provided with an oil spraying member 2, the oil spraying member 2 has a first oil spraying port 211, and the first oil spraying port 211 can spray the cooling oil in the axial oil passage 11 to the axial end of the stator coil 100 corresponding thereto. In this technical solution, by providing the oil spraying member 2, the cooling oil in the axial oil passage 11 can be sprayed to the axial end of the stator coil 100 corresponding to the position where it is set, so that the axial end of the stator coil can be efficiently cooled, which effectively makes up for the poor cooling effect caused by the prior art that the cooling is mostly aimed at the motor housing, the stator core or the rotor assembly, but the end of the stator coil 100 cannot be effectively cooled. It is understandable that, of course, at least two of the oil spray members 2 in the present invention can be provided, and at least two of the oil spray members 2 are provided corresponding to the two axial ends of the stator coil 100 respectively, so as to achieve sufficient cooling of the axial ends of the stator coil 100.

[0045] Preferably, the oil injection member 2 comprises an annular body 22, and a first annular oil collecting groove 23 is provided on the outer peripheral wall of the annular body 22. The first oil injection port 211 is located on a side vertical wall 231 of the first annular oil collecting groove 23. There are a plurality of the first oil injection ports 211, and the plurality of the first oil injection ports 211 are arranged at intervals along the circumference of the annular body 22. The purpose of setting the first annular oil collecting groove 23 is to distribute the cooling oil in the axial oil passage 11 received by it more reasonably and evenly, so that the oil injection amount of the plurality of the first oil injection ports 211 can meet the preset value. It can be understood that when the motor is in a horizontal position, When the motor is installed, the first annular oil collecting groove 23 mainly plays an actual oil collecting role because it is in the upper position, and the corresponding first oil spray port 211 is mainly the upper oil spray port to realize the oil spraying effect. It can be understood that the first oil spray port 211 at the lower part does not spray oil, but at this time, the first oil spray port 211 at the upper part can spray cooling oil to the upper area of ​​the end of the stator coil 100, and the cooling oil can still be scattered in the lower area of ​​the stator coil 100 under the action of its own weight, thereby ensuring that the cooling structure can also achieve effective cooling of the axial end of the stator coil 100 when the motor is in a horizontal state.

[0046] As a specific embodiment, preferably, the diameter of the distribution pitch circle of the plurality of first oil jets 211 is larger than the outer circle diameter of the stator coil 100, so that when the motor is lying, the cooling oil sprayed from the first oil jets 211 can fall on the stator coil 100 below it by its own weight. Preferably, the calibers of the plurality of first oil jets 211 are different. Specifically, the caliber of the first oil jets 211 is proportional to the temperature of the stator coil 100 to which it corresponds, that is, the higher the temperature, the larger the caliber. Furthermore, the first oil jets 211 can be arranged in multiple circles around the axis of the annular body 22, and the radial coverage distance of the multiple circles of the first oil jets 211 is preferably set to be larger than the radial single-sided thickness of the axial end of the stator coil 100.

[0047] In order to facilitate the installation of the fuel injection component 2, a positioning protrusion 24 is constructed on the other side wall 232 of the first annular oil collecting groove 23, and the corresponding end of the motor housing 1 and the fuel injection component 2 is provided with a corresponding positioning groove 12, and the positioning protrusion 24 can be embedded in the positioning groove 12 to realize the assembly connection between the fuel injection component 2 and the motor housing 1. It can be further understood that at this time, the motor end cover 31 will be arranged on the side of the other side wall 232 away from the motor housing 1 to realize the final positioning of the fuel injection component 2 on the motor.

[0048] Specifically, the motor housing 1 has a plurality of axial oil passages 11, and the plurality of axial oil passages 11 are arranged at intervals along the circumference of the motor housing 1. The axial oil passages 11 have a first wall 111 and a second wall 112 that are arranged at relative intervals along the radial direction of the motor housing 1. The one side vertical wall 231 and the other side vertical wall 232 correspond to the second wall 112 and the first wall 111 respectively, and a second seal 122 is sandwiched between the one side vertical wall 231 and the second wall 112, and / or a first seal 121 is sandwiched between the other side vertical wall 232 and the first wall 111.

[0049] The motor housing 1 is also structured with a circumferential oil passage 13, which passes through a plurality of the axial oil passages 11 along the circumference of the motor housing 1. Preferably, the circumferential oil passage 13 has an opening on the side facing the stator core 101. The circumferential oil passage 13 is provided to achieve targeted cooling of the stator core 101. In particular, when the circumferential oil passage 13 has an opening on the side facing the stator core 101, the cooling oil in the circumferential oil passage 13 can directly contact the stator core 101 to achieve efficient heat exchange cooling of the stator core 101. It can be understood that the circumferential oil passage 13 at this time is actually formed by both the motor housing 1 and the stator core 101, and this method can also effectively reduce the manufacturing cost of the circumferential oil passage 13.

[0050] Furthermore, as an optimized implementation of the cooling structure, a second oil spray port 212 is provided on the other side wall 232 of the first annular oil collecting groove 23, and the second oil spray port 212 can spray the cooling oil in the axial oil channel 11 onto the corresponding motor end cover 31, that is, the setting of the oil spray member 2 can cool the shaft end of the stator coil 100 while also cooling the bearing 105 of the motor. Specifically, the motor end cover 31 has a bearing chamber 311, the bearing 105 is arranged in the bearing chamber 311, the inner side wall of the motor end cover 31 has a first bearing guide flow channel 312, the first bearing guide flow channel 312 can receive the cooling oil sprayed from the second oil injection port 212 and guide the cooling oil to the bearing chamber 311, or the motor end cover 31 has a drainage hole 313 passing through the inside and outside thereof, the outer side wall of the motor end cover 31 has a second bearing guide flow channel 314, and the motor housing 1 is also configured with an oil inlet channel 14 passing through the axial oil passage 11, and the second bearing guide flow channel 314 can receive the cooling oil in the oil inlet channel 14 and guide the cooling oil to the bearing chamber 311 through the drainage hole 313. This technical solution provides an end cover structure suitable for cooling the bearing 105, which can guide the cooling oil in the axial oil passage 11 to the bearing chamber 311, and has a simple and novel structure.

[0051] In view of the situation that the second bearing guide flow channel 314 is arranged on the outer side wall of the motor end cover 31, the motor end cover 31 further includes a cover plate 315, the second bearing guide flow channel 314 has an open side, and the cover plate 315 covers and connects to the open side, so as to facilitate the production of the second bearing guide flow channel 314 on the motor end cover 31. It can be understood that in actual application, a corresponding seal is provided between the cover plate 315 and the motor end cover 31 to prevent leakage of cooling oil. It can be further understood that the specific structure of the cover plate 315 can be flexibly designed according to the specific structural type and application scenario of the motor end cover 31. For example, when the motor end cover 31 is used as the non-axial extension side end cover of the motor, the cover plate 315 can not only cover and seal the opening of the second bearing guide flow channel 314, but also can form a sealing cover for the corresponding end of the rotating shaft 104 of the motor rotor 102 and the corresponding bearing 105 to prevent external dust from entering the bearing chamber 311.

[0052] Furthermore, the motor end cover 31 is provided with a guide member 41, and the guide member 41 can receive the cooling oil sprayed from the second oil spray port 212 and guide the cooling oil to the corresponding motor rotor 102. Specifically, the guide member 41 is arranged on the inner side of the motor end cover 31, and the guide member 41 has a guide slope 411 and oil retaining ribs 412 on both sides of the guide slope 411, and the cooling oil sprayed from the second oil spray port 212 can fall on the guide slope 411. The guide slope 411 can be, for example, an inclined plane or an arc surface. The guide member 41 guides the cooling oil in the axial oil passage 11 to the motor rotor 102 via the oil spray member 2, so that the motor rotor 102 can be effectively cooled by the cooling oil. Preferably, the guide slope 411 has a plurality of oil guide grooves 413 extending along the guide direction of the guide slope 411 so as to concentrate the cooling oil dripping onto the guide slope 411, which is beneficial to increase the flow rate of the cooling oil on the guide slope 411 and thus improve the cooling efficiency.

[0053] Preferably, a first core pressure plate 51 is provided at an axial end of the motor rotor 102 corresponding to the guide member 41, and a plurality of first rotor core cooling oil channels 511 are constructed on the first core pressure plate 51. The rotor core 103 has first flow holes 1031 corresponding to the plurality of first rotor core cooling oil channels 511 one by one and penetrating the two axial ends of the rotor core 103. The cooling oil guided out by the guide member 41 can enter the first flow holes 1031 and flow out of the rotor core 103 from one end of the first flow hole 1031 away from the first core pressure plate 51. In this technical solution, the cooling oil guided by the guide member 41 is further introduced into the first flow holes 1031 of the rotor core 103 through the plurality of first rotor core cooling oil channels 511 through the first core pressure plate 51, thereby achieving effective cooling of the rotor core 103 and further improving the cooling effect of the motor. Specifically, the first core pressing plate 51 has a first pressing plate oil collecting ring groove 512 on the side away from the rotor core 103. When the rotor core 103 rotates, the cooling oil in the first pressing plate oil collecting ring groove 512 is thrown into the first rotor core cooling oil channel 511 under the action of centrifugal force, thereby effectively cooling the interior of the rotor core 103. The first core pressing plate 51 can be an integrated structure, and preferably, the first core pressing plate 51 includes a first outer pressing plate 514 and a first inner pressing plate 515, the first outer pressing plate 514 is assembled on the outer side of the first inner pressing plate 515, the first pressing plate oil collecting ring groove 512 is constructed on the first outer pressing plate 514, and a plurality of the first rotor core cooling oil channels 511 are constructed on the first inner pressing plate 515, so that the processing process of the first core pressing plate 51 can be simplified. Furthermore, the contact position between the first inner pressure plate 515 and the first outer pressure plate 514 is provided with a groove 5151, and a plurality of the first rotor core cooling oil channels 511 are located at the intersection of the groove vertical wall and the groove bottom wall of the groove 5151. It can be understood that, at this time, the intersection of the groove vertical wall and the groove bottom wall will objectively become a containment and guiding structure for the cooling oil thrown out of the first pressure plate oil collecting ring groove 512, especially the groove vertical wall can prevent the cooling oil from being thrown out along the radial direction of the motor rotor 102, and be guided into the first flow hole 1031, and the centrifugal force of the motor rotor 102 provides the power for the cooling oil to flow axially in the first flow hole 1031.

[0054] The first rotor core cooling oil channel 511 has a first alignment annular groove 5111 at the opening facing the rotor core 103, and the first alignment annular groove 5111 is arranged corresponding to the first flow hole 1031. In this technical solution, the diameter of the first alignment annular groove 5111 is larger than the diameter of the first flow hole 1031 and other parts of the first rotor core cooling oil channel 511, which can facilitate the alignment of the first core pressure plate 51 and the rotor core 103, ensure the smooth flow of cooling oil, and prevent the misalignment of the first rotor core cooling oil channel 511 and the first flow hole 1031, which will cause the cooling oil to be retained and thus reduce the cooling effect of the motor rotor.

[0055] Furthermore, a plurality of oil guiding ribs 516 are provided on the side wall of the first inner pressure plate 515 facing the first outer pressure plate 514, and the plurality of oil guiding ribs 516 are arranged one by one at the inlets of the plurality of first rotor core cooling oil channels 511, and the plurality of oil guiding ribs 516 are located on the inner side of the inlets and are arranged at intervals along the circumference of the first inner pressure plate 515. Preferably, the plurality of oil guiding ribs 516 are inclined radially outwardly along the first inner pressure plate 515, and the inclination direction is the same as the rotation direction of the motor rotor 102. The plurality of oil guiding ribs 516 are arranged one by one for the inlets of the plurality of first rotor core cooling oil channels 511, so that the cooling oil in the first pressure plate oil collecting ring groove 512 can be more quickly guided into the first rotor core cooling oil channel 511.

[0056] As described above, the oil spray parts 2 are provided at both axial ends of the axial oil channel 11, and the oil spray parts 2 are also provided at the other axial end of the axial oil channel 11. The second core pressure plate 52 is provided at the other axial end of the motor rotor 102 corresponding to the oil spray part 2, and the second core pressure plate 52 is provided with a third rotor core cooling oil channel 521 corresponding to the plurality of first rotor core cooling oil channels 511. At this time, the other axial end of the stator coil 100 can also be effectively cooled. At the same time, the setting of the third rotor core cooling oil channel 521 can further use the cooling oil in the axial oil channel 11 to further cool the motor rotor 102. Specifically, the second core pressure plate 52 has a second pressure plate oil collecting ring groove 522 on the side facing away from the rotor core 103, and the first core pressure plate 51 is also constructed with a plurality of second rotor core cooling oil channels 513. The rotor core 103 also has second flow holes 1032 that correspond one-to-one to the plurality of second rotor core cooling oil channels 513 and pass through the axial ends of the rotor core 103. When the rotor core 103 rotates, the cooling oil in the second pressure plate oil collecting ring groove 522 is thrown into the third rotor core cooling oil channel 521 under the action of centrifugal force and flows out of the rotor core 103 through the second rotor core cooling oil channel 513. With the same design concept as the first core pressure plate 51, the second core pressure plate 52 includes a second outer pressure plate 523 and a second inner pressure plate 524, the second outer pressure plate 523 is assembled on the outer side of the second inner pressure plate 524, the second pressure plate oil collecting ring groove 522 is constructed on the second outer pressure plate 523, and multiple third rotor core cooling oil channels 521 are constructed on the second inner pressure plate 524; and / or, the second rotor core cooling oil channel 513 has a second alignment ring groove 5131 at the opening facing the rotor core 103, and the second alignment ring groove 5131 is corresponding to the second flow hole 1032; and / or, the third rotor core cooling oil channel 521 has a third alignment ring groove 5211 at the opening facing the rotor core 103, and the third alignment ring groove 5211 is corresponding to the second flow hole 1032.

[0057] Furthermore, a first oil return groove 316 is also constructed on the motor end cover 31, and / or a second oil return groove 15 is also constructed on the motor housing 1. The motor end cover 31 can be, for example, a motor shaft extension end cover or a motor non-shaft extension end cover. The first oil return groove 316 is connected to the second oil return groove 15, and it can be understood that it ultimately forms a coolant flow cooling cycle with the oil inlet channel 14 through an external cooling oil supply device; a shaft seal 106 is also provided between the rotating shaft 104 and the outer wall of the motor end cover 31.

[0058] The present invention further provides a motor, comprising the above-mentioned motor cooling structure, wherein the motor is preferably a horizontal housing motor.

[0059] The present invention also provides a car, comprising a main drive motor, wherein the main drive motor is the above-mentioned motor.

[0060] It is easy for those skilled in the art to understand that, under the premise of no conflict, the above-mentioned advantageous methods can be freely combined and superimposed.

[0061] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention. The above description is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present invention. These improvements and variations should also be regarded as the protection scope of the present invention.

Claims

1. A motor cooling structure, It is characterized in that The invention comprises a motor housing (1), wherein an axial oil passage (11) is constructed on the motor housing (1), wherein the axial oil passage (11) is connected to a flow path of an external cooling oil supply component, wherein at least one axial end of the axial oil passage (11) is provided with an oil spraying member (2), wherein the oil spraying member (2) has a first oil spraying port (211), wherein the first oil spraying port (211) can spray the cooling oil in the axial oil passage (11) onto the axial end of a stator coil (100) corresponding thereto; and a bearing chamber (311) is provided on the motor end cover, wherein the inner side wall of the motor end cover has a first bearing guide flow passage (312), wherein the first bearing guide flow passage (312) can receive the cooling oil in the axial oil passage (11) and the cooling oil in the axial oil passage (11) can be sprayed onto the axial end of the stator coil (100) corresponding thereto. The cooling oil is guided into the bearing chamber (311); the motor end cover is provided with a drainage hole (313) penetrating the inside and outside thereof, and the outer wall of the motor end cover is provided with a second bearing guide flow channel (314); through the drainage hole (313), the second bearing guide flow channel (314) can receive the cooling oil and guide the cooling oil into the bearing chamber (311); the cooling oil received by the second bearing guide flow channel (314) comes from the oil inlet channel (14) on the motor housing (1); the first bearing guide flow channel (312) and the second bearing guide flow channel (314) act on the bearing in the bearing chamber (311) independently.

2. The cooling structure according to claim 1, It is characterized in that The oil spraying member (2) comprises an annular body (22), the outer peripheral wall of which is provided with a first annular oil collecting groove (23), and the first oil spraying port (211) is located on a side vertical wall (231) of the first annular oil collecting groove (23).

3. The cooling structure according to claim 2, It is characterized in that There are a plurality of the first oil injection ports (211), the plurality of the first oil injection ports (211) are arranged at intervals along the circumference of the annular body (22), and the diameter of the distribution pitch circle of the plurality of the first oil injection ports (211) is greater than the outer circle diameter of the stator coil (100).

4. The cooling structure according to claim 3, It is characterized in that The diameters of the plurality of first oil injection ports (211) are different.

5. The cooling structure according to claim 2, It is characterized in that A positioning protrusion (24) is constructed on the other side vertical wall (232) of the first annular oil collecting groove (23), and corresponding positioning grooves (12) are provided at the corresponding ends of the motor housing (1) and the oil spray component (2), and the positioning protrusion (24) can be embedded in the positioning groove (12) to realize the assembly connection between the oil spray component (2) and the motor housing (1).

6. The cooling structure according to claim 5, It is characterized in that The axial oil passage (11) has a plurality of axial oil passages (11), and the plurality of axial oil passages (11) are arranged at intervals along the circumference of the motor housing (1); and / or the axial oil passage (11) has a first wall (111) and a second wall (112) arranged at intervals along the radial direction of the motor housing (1); the one side vertical wall (231) and the other side vertical wall (232) respectively correspond to the second wall (112) and the first wall (111) and abut against them one by one; a second sealing member (122) is sandwiched between the one side vertical wall (231) and the second wall (112); and / or a first sealing member (121) is sandwiched between the other side vertical wall (232) and the first wall (111).

7. The cooling structure according to claim 1, It is characterized in that A circumferential oil passage (13) is also constructed on the motor housing (1), and the circumferential oil passage (13) penetrates through the plurality of axial oil passages (11) along the circumference of the motor housing (1).

8. The cooling structure according to claim 7, It is characterized in that The circumferential oil passage (13) has an opening on a side facing the stator core (101).

9. The cooling structure according to claim 2, It is characterized in that A second oil spray port (212) is provided on the other side wall (232) of the first annular oil collecting groove (23), and the second oil spray port (212) can spray the cooling oil in the axial oil passage (11) onto the motor end cover (31) corresponding thereto.

10. A motor, comprising a motor cooling structure, It is characterized in that The motor cooling structure is the motor cooling structure according to any one of claims 1 to 9.

11. A vehicle comprising a main drive motor, It is characterized in that The main drive motor is the motor described in claim 10.

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