Driving motor and vehicle

Abstract

The invention relates to the technical field of driving motors, and discloses a driving motor and a vehicle. The driving motor comprises a shell and a stator core; the shell is provided with an oil inlet channel and an oil return channel, and the oil inlet channel comprises a first oil inlet and two outlets; the stator core is fixedly connected in the shell, a plurality of groups of first cooling oil ducts are sequentially arranged on the stator core along the circumferential direction, and each group is provided with at least one first cooling oil duct; the first cooling oil channel extends in the axial direction, and an oil inlet and an oil outlet of the first cooling oil channel are formed in the two ends of the stator iron core respectively; the two outlets are distributed in the two sides of the stator at intervals in the axial direction, the oil inlets of every two adjacent sets of first cooling oil channels communicate with the two outlets correspondingly, and the oil outlets of every two adjacent sets of first cooling oil channels communicate with the oil return channel. According to the driving motor provided by the invention, the first cooling oil channels with opposite flowing directions can cool the interior of the stator iron core and the stator windings connected to the stator slots of the stator iron core, so that the utilization rate of cooling oil is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of drive motors, and in particular to drive motors and vehicles. Background Art

[0002] In recent years, new energy vehicles are entering a critical stage of rapid development. As one of the core components of new energy vehicles, the motor is also receiving extensive attention from automobile manufacturers and scientific researchers. The drive motor usually has the characteristics of compact structure, high power density, and high efficiency, but it will generate a lot of heat during its operation, which will affect the motor output performance. Therefore, the design of a cooling system that can effectively curb the temperature rise of the drive motor is particularly important.

[0003] At present, the main cooling methods for drive motors are casing water cooling or winding end oil cooling. Casing water cooling uses cooling water inside the motor casing to remove the heat generated during the operation of the motor. This cooling method makes it difficult for the cooling medium to penetrate into the heat source of the motor, and the motor still has the risk of overheating under extreme working conditions; winding end oil cooling is through direct contact between the cooling oil and the motor winding end. In this way, the cooling oil is difficult to penetrate into the motor stator slot, and the cooling oil utilization rate is not high, which affects the continuous output of the motor to a certain extent. Summary of the invention

[0004] In view of this, the present invention provides a driving motor and a vehicle to solve the problem that the cooling oil utilization rate is low and the continuous output of the motor is affected.

[0005] In a first aspect, the present invention provides a driving motor, comprising:

[0006] The housing is provided with an oil inlet passage and an oil return passage, wherein the oil inlet passage comprises a first oil inlet and two oil outlets;

[0007] A stator core is fixedly connected to the inside of the shell, and a plurality of groups of first cooling oil channels are sequentially arranged on the stator core along the circumferential direction, and each group has at least one first cooling oil channel; the first cooling oil channel extends along the axial direction, and the oil inlet and the oil outlet of the first cooling oil channel are respectively arranged at the two ends of the stator core; the two outlets are spaced apart and distributed on both sides of the stator along the axial direction, and the oil inlets of two adjacent groups of the first cooling oil channels are respectively connected to the two outlets, and the oil outlet is connected to the oil return channel.

[0008] Beneficial effects: an oil inlet channel and an oil return channel are provided on the shell, and the first cooling oil channel extends in the stator core along the axial direction. The cooling oil flows through the first cooling oil channel of the stator core along the axial direction, which can cool the inside of the stator core and the stator winding connected to the stator slot of the stator core, thereby improving the utilization rate of the cooling oil; and the oil inlets of two adjacent groups of first cooling oil channels are respectively connected to the two outlets, so that the flow directions of the cooling oil in the two adjacent groups of first cooling oil channels are opposite, so that the cooling oil cools the stator core and the stator winding more evenly, thereby avoiding the occurrence of local overtemperature.

[0009] In an optional implementation, it also includes:

[0010] Stator winding;

[0011] Two oil guide rings are respectively arranged at the two ends of the stator core and are located between the stator winding and the shell; the oil guide ring, the shell and the stator core are sealed to form a first oil chamber, and the first oil chamber is connected to the oil inlet and the outlet; the oil guide ring is provided with an oil injection hole, and the oil injection hole is connected to the first oil chamber and the corresponding end of the stator winding; the oil guide ring and the stator core are sealed to form a second oil chamber, and the second oil chamber is connected to the oil outlet, and the oil guide ring is also provided with a notch connecting the second oil chamber and the oil return channel.

[0012] Beneficial effects: The oil guide ring, the housing and the stator core are sealed to form a first oil chamber, which can form oil pressure and drainage. The oil guide ring and the stator core are sealed to form a second oil chamber, which can collect the cooling oil flowing out of the stator to flow out of the drive motor through the gap and the return oil channel. A part of the cooling oil entering from the oil inlet channel passes through the first oil chamber, the oil inlet, the first cooling oil channel, the oil outlet, the second oil chamber and the gap in turn into the return oil channel to cool the stator core and the stator winding connected to the stator slot of the stator core, thereby improving the utilization rate of the cooling oil; another part of the cooling oil entering from the oil inlet channel is directly sprayed on the end of the stator winding through the oil spray hole. Therefore, by setting the oil guide ring, the cooling oil is divided into two parts, which not only cools the stator core and the stator winding connected to the stator slot of the stator core, but also sprays and cools the end of the stator winding.

[0013] In an optional embodiment, stator slots are provided on the inner circumference of the stator core, and in the radial direction, at least part of the first cooling oil channel is arranged on a side close to the stator slots.

[0014] Beneficial effect: At least part of the first cooling oil channel is arranged on a side close to the stator slot, so that the cooling oil can be close to the stator winding to better cool the stator winding.

[0015] In an optional embodiment, the inner circumference of the stator core is provided with stator slots, and the stator core comprises:

[0016] A first core, wherein the stator slots and the first oil holes are sequentially provided in a radially outward direction, wherein the first oil holes are provided at positions close to the stator slots;

[0017] The second core has two groups arranged at two ends of the first core in the axial direction, and the stator slots and radial oil passages are arranged in sequence in the radial outward direction on the second core;

[0018] The third core has two groups arranged at intervals in the axial direction, the first core and the two groups of the second core are arranged between the two groups of the third core; the third core is provided with the stator slots, multiple groups of second oil holes and multiple groups of third oil holes, the multiple groups of the second oil holes and the multiple groups of the third oil holes are cross-distributed in the circumferential direction, the second oil holes and the third oil holes are respectively arranged outside the corresponding stator slots in the radial direction; in the axial direction, the second oil holes of one group of the third cores are arranged correspondingly to the third oil holes of the other group of the third cores;

[0019] The second oil hole at one end, the radial oil passage at one end, the first oil hole, the radial oil passage at the other end and the third oil hole at the other end are connected in sequence to form the first cooling oil passage, the second oil hole forms the oil inlet, and the third oil hole forms the oil outlet.

[0020] In an optional embodiment, the radial oil circuit includes:

[0021] An oil circuit body extends in a radial direction, and a projection of the third oil hole on the second core is located on the corresponding oil circuit body;

[0022] an external oil port, connected to an end of the oil circuit body away from the stator slot, wherein a projection of the second oil hole on the second core coincides with the corresponding external oil port;

[0023] The inner oil port is communicated with one end of the oil circuit body close to the stator slot, and the projection of the first oil hole on the second core coincides with the corresponding inner oil port.

[0024] In an optional embodiment, a first sealing ring is provided between a first ring end of the oil guide ring away from the stator core and the shell, a second ring end of the oil guide ring close to the stator core is spaced apart from the shell, and a second sealing ring is provided between a side of the second ring end close to the shell and the stator core.

[0025] In an optional embodiment, an annular groove with a notch facing the stator core is provided on the second ring end of the oil guide ring close to the stator core, a second sealing ring and a third sealing ring are provided between the oil guide ring and the stator core, the second sealing ring is located on the outer ring of the annular groove, the third sealing ring is located on the inner ring of the annular groove, and the notch is provided on the inner ring groove wall of the annular groove and the third sealing ring.

[0026] In an optional implementation, it also includes:

[0027] The rotor is provided with a second cooling oil passage;

[0028] A rotating shaft is arranged inside the rotor, a receiving cavity is arranged inside the rotating shaft, a second oil inlet and a first oil-swinging hole connected to the receiving cavity are arranged on the rotating shaft, and the second cooling oil channel is connected to the first oil-swinging hole and the oil return channel.

[0029] Beneficial effect: The cooling oil enters the accommodating chamber through the second oil inlet. When the rotor drives the rotating shaft to rotate, the cooling oil in the accommodating chamber is thrown out to the second cooling oil channel through the first oil-throwing hole, and enters the return oil channel through the second cooling oil channel for recovery, so as to achieve cooling of the rotor and the magnetic steel on the rotor.

[0030] In an optional embodiment, the first end and the second end of the rotating shaft of the rotating shaft are respectively protruded from the rotor, the second oil inlet is arranged at the first end of the rotating shaft, and the rotating shaft is further provided with a second oil-spinning hole communicating with the accommodating cavity; the first oil-spinning hole and the second oil-spinning hole are both arranged at the second end of the rotating shaft; the driving motor further includes:

[0031] A first balancing end plate, sleeved on the first oil-spinning hole at the first end of the rotating shaft, wherein a first oil collecting groove is provided on the first balancing end plate;

[0032] A second balancing end plate is sleeved on the second end of the rotating shaft, and a second oil collecting groove and a third oil throwing hole are provided on the second balancing end plate; the second oil throwing hole and the third oil throwing hole are respectively connected to the two ends of the stator winding;

[0033] The second oil inlet, the accommodating chamber, the first oil-swinging hole, the first oil collecting groove, the second cooling oil channel, the second oil collecting groove and the third oil-swinging hole are connected in sequence.

[0034] Beneficial effect: The cooling oil enters the accommodating cavity through the second oil inlet, and in the process of the rotor driving the rotating shaft to rotate, a part of it passes through the first oil-slinging hole, the first oil collecting groove, the second cooling oil channel, the second oil collecting groove and the third oil-slinging hole in sequence to reach one end of the stator winding, and while cooling the rotor, one end of the stator winding is also sprayed and cooled; the other part is directly sprayed and cooled on the other end of the stator winding through the third oil-slinging hole.

[0035] In a second aspect, the present invention further provides a vehicle, comprising the above-mentioned drive motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the related technologies, the drawings required for use in the specific embodiments or the related technical descriptions will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0037] Figure 1 A cross-sectional view of a drive motor according to an embodiment of the present invention Figure 1 ;

[0038] Figure 2 A cross-sectional view of a drive motor according to an embodiment of the present invention Figure 2 ;

[0039] Figure 3 for Figure 1 A partial enlarged schematic diagram of

[0040] Figure 4 A partial structural cross-sectional view of a driving motor according to an embodiment of the present invention;

[0041] Figure 5 A schematic diagram of a stator core of a drive motor according to an embodiment of the present invention;

[0042] Figure 6 is a cross-sectional view of a stator core of a drive motor according to an embodiment of the present invention;

[0043] Figure 7 is a schematic diagram of a first iron core of a driving motor according to an embodiment of the present invention;

[0044] Figure 8 is a schematic diagram of a second core of a driving motor according to an embodiment of the present invention;

[0045] Fig. 9 A schematic diagram of the distribution of a second iron core of a driving motor according to an embodiment of the present invention;

[0046] Fig.10is a schematic diagram of a third core of a driving motor according to an embodiment of the present invention;

[0047] Fig.11 A schematic diagram of the distribution of a third core of a driving motor according to an embodiment of the present invention;

[0048] Fig.12 A schematic diagram of an oil guide ring of a drive motor according to an embodiment of the present invention;

[0049] Fig.13 This is a partial enlarged view of an oil guide ring of a drive motor according to an embodiment of the present invention;

[0050] Fig.14 is a cross-sectional view of a rotating shaft of a driving motor according to an embodiment of the present invention;

[0051] Fig.15 It is a schematic diagram of a first balancing end plate of a driving motor according to an embodiment of the present invention;

[0052] Fig.16 for Fig.15 A partial enlarged schematic diagram of

[0053] Fig.17 is a schematic diagram of a second balancing end plate of a driving motor according to an embodiment of the present invention;

[0054] Fig.18 for Fig.17 A partial enlarged schematic diagram of

[0055] Fig.19 is a schematic diagram of a rotor of a driving motor according to an embodiment of the present invention;

[0056] Fig. 20 is a cross-sectional view of a rotor of a driving motor according to an embodiment of the present invention;

[0057] Fig.21 A schematic diagram of a driving motor according to an embodiment of the present invention from a viewing angle;

[0058] Fig. 22 FIG. 4 is a schematic diagram of a driving motor according to an embodiment of the present invention from another perspective.

[0059] Description of reference numerals:

[0060] 1. Shell; 11. Oil inlet channel; 111. First oil inlet; 112. Outlet; 121. Oil return port; 2. Stator core; 21. First cooling oil channel; 22. Stator slot; 23. First core; 231. First oil hole; 24. Second core; 241. Radial oil passage; 25. Third core; 251. Second oil hole; 252. Third oil hole; 3. Stator winding; 4. Oil guide ring; 41. Oil injection hole; 42. Notch; 43. First seal Ring; 44, second sealing ring; 45, annular groove; 46, third sealing ring; 5, first oil chamber; 6, second oil chamber; 7, rotor; 71, second cooling oil channel; 72, magnet; 8, rotating shaft; 81, accommodating chamber; 82, second oil inlet; 83, first oil-spinning hole; 84, second oil-spinning hole; 9, first balancing end plate; 91, first oil collecting trough; 10, second balancing end plate; 101, second oil collecting trough; 102, third oil-spinning hole; 13, bearing. DETAILED DESCRIPTION

[0061] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0062] Combine the following Figures 1 to 22 , describing an embodiment of the present invention.

[0063] According to an embodiment of the present invention, on the one hand, a drive motor is provided, comprising a housing 1 and a stator core 2; the housing 1 is provided with an oil inlet channel 11 and an oil return channel, the oil inlet channel 11 comprising a first oil inlet port 111 and two outlet ports 112; the stator core 2 is fixedly connected to the interior of the housing 1, and a plurality of groups of first cooling oil channels 21 are sequentially provided on the stator core 2 along the circumferential direction, and each group has at least one first cooling oil channel 21; the first cooling oil channel 21 extends in an axial direction, and the oil inlet port and the oil outlet port of the first cooling oil channel 21 are respectively arranged at two ends of the stator core 2; the two outlet ports 112 are spaced apart on both sides of the stator in the axial direction, the oil inlets of two adjacent groups of the first cooling oil channels 21 are respectively connected to the two outlet ports 112, and the oil outlet port is connected to the oil return channel.

[0064] An oil inlet channel 11 and an oil return channel are provided on the shell 1. The first cooling oil channel 21 extends in the stator core 2 along the axial direction. The cooling oil flows through the first cooling oil channel 21 of the stator core 2 along the axial direction, and can cool the inside of the stator core 2 and the stator winding 3 connected to the stator slot 22 of the stator core 2, thereby improving the utilization rate of the cooling oil; and the oil inlets of two adjacent groups of first cooling oil channels 21 are respectively connected to the two outlets 112, so that the flow directions of the cooling oil in the two adjacent groups of first cooling oil channels 21 are opposite, so that the cooling oil can cool the stator core 2 and the stator winding 3 more evenly, thereby avoiding the occurrence of local overtemperature.

[0065] In a specific embodiment, the stator includes a stator core 2 and a stator winding 3. The stator winding 3 is arranged on the inner periphery of the stator core 2 and connected to the stator slot 22 of the stator core 2. The two ends of the stator winding 3 in the axial direction are respectively protruded from the stator core 2. The stator is pressed into the housing 1 by interference fit. The oil inlet channel 11 also includes a first oil inlet port 111. The oil inlet channel 11 extends along the axial direction of the stator core 2. The first oil inlet port 111 is arranged at one end of the oil inlet channel 11. Preferably, the first oil inlet port 111 is arranged at the top of the front end of the housing 1. The oil return channel is provided with an oil return port 121. The bottom of the front end and the rear end of the housing 1 can be provided with the oil return port 121. The oil return port 121 can be connected to the inlet of the oil inlet channel 11 through an oil pump to realize the recycling of cooling oil; or, the oil return port 121 can also be connected to a recovery device for recovering cooling oil.

[0066] In this embodiment, the drive motor also includes a rotor 7, and the stator is sleeved on the outer circumference of the rotor 7. The axial directions mentioned in this embodiment are all the axial directions of the rotor 7, and the radial directions are all the radial directions of the rotor 7, wherein the rotor 7 and the stator are coaxially arranged.

[0067] In one embodiment, Figures 1 to 3 As shown, the drive motor also includes a stator winding 3 and two oil guide rings 4, which are respectively arranged at the two ends of the stator core 2 and located between the stator winding 3 and the shell 1; the oil guide ring 4, the shell 1 and the stator core 2 are sealed to form a first oil chamber 5, and the first oil chamber 5 is connected to the oil inlet and the outlet 112; the oil guide ring 4 is provided with an oil injection hole 41, and the oil injection hole 41 is connected to the first oil chamber 5 and the corresponding end of the stator winding 3; the oil guide ring 4 and the stator core 2 are sealed to form a second oil chamber 6, and the second oil chamber 6 is connected to the oil outlet, and the oil guide ring 4 is also provided with a notch 42 connecting the second oil chamber 6 and the oil return channel.

[0068] The oil guide ring 4, the housing 1 and the stator core 2 are sealed to form a first oil chamber 5, which can form oil pressure and drainage. The oil guide ring 4 and the stator core 2 are sealed to form a second oil chamber 6, which can collect the cooling oil flowing out of the stator to flow out of the drive motor through the gap 42 and the return oil channel. A part of the cooling oil entering from the oil inlet channel 11 passes through the first oil chamber 5, the oil inlet, the first cooling oil channel 21, the oil outlet, the second oil chamber 6 and the gap 42 in sequence to enter the return oil channel to cool the inside of the stator core 2 and the stator winding 3 connected to the stator slot 22 of the stator core 2, thereby improving the utilization rate of the cooling oil; another part of the cooling oil entering from the oil inlet channel 11 is directly sprayed on the end of the stator winding 3 through the oil spray hole 41. Therefore, by setting the oil guide ring 4, the cooling oil is divided into two parts, which not only cools the inside of the stator core 2 and the stator winding 3 connected to the stator slot 22 of the stator core 2, but also sprays and cools the end of the stator winding 3.

[0069] In one embodiment, a stator slot 22 is provided on the inner circumference of the stator core 2 , and in the radial direction, at least a portion of the first cooling oil channel 21 is provided on a side close to the stator slot 22 .

[0070] At least part of the first cooling oil channel 21 is arranged on a side close to the stator slot 22 , so that the cooling oil can be close to the stator winding 3 , so as to better cool the stator winding 3 .

[0071] In one embodiment, the inner circumference of the stator core 2 is provided with a stator slot 22, and the stator core 2 includes a first core 23, a second core 24 and a third core 25, and the first core 23, the second core 24 and the third core 25 all include multiple pieces stacked in the axial direction. The first core 23 is provided with the stator slots 22 and the first oil holes 231 in sequence in the radially outward direction, and the first oil holes 231 are arranged at a position close to the stator slots 22; the second core 24 has two groups arranged at both ends of the first core 23 in the axial direction, and the second core 24 is provided with the stator slots 22 and radial oil passages 241 in sequence in the radially outward direction; the third core 25 has two groups arranged at intervals in the axial direction, and the first core 23 and the two groups of the second cores 24 are arranged between the two groups of the third cores 25; the third core 25 is provided with the stator slots 22, multiple groups of second oil holes 251 and multiple groups of third oil holes 252, and multiple groups of the second oil holes 251 and the third oil holes 252 are arranged in sequence. 51 and multiple groups of the third oil holes 252 are cross-distributed along the circumferential direction, and the second oil holes 251 and the third oil holes 252 are respectively arranged on the outside of the corresponding stator slots 22 along the radial direction; in the axial direction, the second oil holes 251 of one group of the third cores 25 are correspondingly arranged with the third oil holes 252 of another group of the third cores 25; the second oil holes 251 at one end, the radial oil passage 241 at one end, the first oil holes 231, the radial oil passage 241 at the other end and the third oil holes 252 at the other end are connected in sequence to form the first cooling oil passage 21, the second oil holes 251 form the oil inlet, and the third oil holes 252 form the oil outlet.

[0072] The first oil hole 231 is arranged at a position close to the stator slot 22, so that the cooling oil can be close to the stator winding 3 to better cool the stator winding 3; through the setting of the radial oil passage 241, the first oil hole 231, the second oil hole 251 and the third oil hole 252 can be easily connected in the radial direction to form a first cooling oil channel 21 through which the cooling oil can flow smoothly.

[0073] In a specific embodiment, two groups of second cores 24 are symmetrically arranged at both ends of the first core 23 in the axial direction; two groups of third cores 25 are staggered at both ends of the first core 23 and the two groups of second cores 24. The first core 23 is provided with a plurality of stator slots 22 and a plurality of first oil holes 231 along the circumferential direction, and the number and position of the stator slots 22 and the first oil holes 231 are in one-to-one correspondence; the second core 24 is provided with a plurality of stator slots 22 and a plurality of radial oil passages 241 along the circumferential direction, and the number and position of the stator slots 22 and the radial oil passages 241 are in one-to-one correspondence; each group of second oil holes 251 can be provided with at least one along the circumferential direction, and each group of third oil holes 252 can be provided with at least one along the circumferential direction; the third core 25 is provided with a plurality of stator slots 22 along the circumferential direction, and the number and position of the stator slots 22 on the third core 25 are in one-to-one correspondence with those on the second core 24; each stator slot 22 on the third core 25 corresponds to a second oil hole 251 or a third oil hole 252.

[0074] In one embodiment, the radial oil circuit 241 includes an oil circuit body, an outer oil port and an inner oil port; the oil circuit body extends in the radial direction, and the projection of the third oil hole 252 on the second iron core 24 is located on the corresponding oil circuit body; the outer oil port is connected to the end of the oil circuit body away from the stator slot 22, and the projection of the second oil hole 251 on the second iron core 24 coincides with the corresponding outer oil port; the inner oil port is connected to the end of the oil circuit body close to the stator slot 22, and the projection of the first oil hole 231 on the second iron core 24 coincides with the corresponding inner oil port.

[0075] The projection of the third oil hole 252 on the second iron core 24 is located on the corresponding oil circuit body, and the projection of the second oil hole 251 on the second iron core 24 coincides with the corresponding external oil port, so that the second oil hole 251 and the third oil hole 252 are staggered in the radial direction, so that the second oil hole 251 and the third oil hole 252 are connected to the oil inlet channel 11 and the oil return channel respectively.

[0076] In a specific implementation, the widths of the inner oil port and the outer oil port are both greater than the width of the oil circuit body, so as to form a radial oil circuit 241 in the shape of the English letter “I”.

[0077] In one embodiment, a first sealing ring 43 is provided between the first ring end of the oil guide ring 4 away from the stator core 2 and the housing 1, the second ring end of the oil guide ring 4 close to the stator core 2 is spaced apart from the housing 1, and a second sealing ring 44 is provided between the side of the second ring end close to the housing 1 and the stator core 2.

[0078] The first sealing ring 43 is used to seal the first ring end of the oil guide ring 4 and the housing 1 to prevent the cooling oil from overflowing; the second sealing ring 44 is used to seal the second ring end and the stator core 2 to prevent the cooling oil from overflowing; the oil guide ring 4 can form the first oil chamber 5 together with the housing 1 and the stator core 2, and the sealing performance of the first oil chamber 5 can be ensured.

[0079] In one embodiment, an annular groove 45 with a notch facing the stator core 2 is provided on the second ring end of the oil guide ring 4 close to the stator core 2, and a second sealing ring 44 and a third sealing ring 46 are provided between the oil guide ring 4 and the stator core 2, the second sealing ring 44 is located on the outer ring of the annular groove 45, and the third sealing ring 46 is located on the inner ring of the annular groove 45, and the notch 42 is provided on the inner ring groove wall of the annular groove 45 and the third sealing ring 46.

[0080] The second sealing ring 44 is used to seal the second ring end and the stator core 2, and the outer ring of the annular groove 45 is sealed to prevent the cooling oil from overflowing. The first oil chamber 5 and the second oil chamber 6 are also sealed and separated to prevent the cooling oil from overflowing between the first oil chamber 5 and the second oil chamber 6, so as to ensure the cooling effect of the cooling oil on the inside of the stator core 2 and the stator winding 3 connected to the stator slot 22 of the stator core 2. The third sealing ring 46 is used to seal the inner ring of the annular groove 45, so as to ensure that the cooling oil in the second oil chamber 6 can only enter the oil return channel through the notch 42 and will not overflow to other positions.

[0081] In a specific implementation, the shapes of the two oil guide rings 4 can be the same, or they can be modified according to the actual situation of the drive motor. However, in order to achieve the cooling purpose, the oil injection holes 41, the first sealing ring 43, the second sealing ring 44, the annular groove 45, the third sealing ring 46 and the notch 42 on the two oil guide rings 4 must be set accordingly.

[0082] In one embodiment, the drive motor further comprises a rotor 7 and a rotating shaft 8; the rotor 7 is rotatably disposed inside the stator, and a magnetic steel 72 is embedded in the rotor 7; the rotor 7 is provided with a second cooling oil passage 71; the rotating shaft 8 is disposed inside the rotor 7, and a receiving cavity 81 is provided inside the rotating shaft 8, such as Fig.14 As shown, the rotating shaft 8 is provided with a second oil inlet 82 and a first oil-slinging hole 83 communicating with the accommodating cavity 81 , and the second cooling oil channel 71 is communicated with the first oil-slinging hole 83 and the oil return channel.

[0083] The cooling oil enters the accommodating chamber 81 through the second oil inlet 82. When the rotor 7 drives the rotating shaft 8 to rotate, the cooling oil in the accommodating chamber 81 is thrown out to the second cooling oil channel 71 through the first oil throwing hole 83, and enters the return oil channel through the second cooling oil channel 71 for recovery, so as to cool the rotor 7 and the magnetic steel 72 on the rotor 7.

[0084] In one embodiment, the first end of the rotating shaft 8 and the second end of the rotating shaft 8 are respectively protruded from the rotor 7, the second oil inlet 82 is arranged at the first end of the rotating shaft 8, and the rotating shaft 8 is also provided with a second oil-slinging hole 84 connected with the accommodating cavity 81; the first oil-slinging hole 83 and the second oil-slinging hole 84 are both arranged at the second end of the rotating shaft 8; the driving motor also includes a first balancing end plate 9 and a second balancing end plate 10; the first balancing end plate 9 is sleeved on the first oil-slinging hole 83 at the first end of the rotating shaft 8, the A first oil collecting groove 91 is provided on the first balancing end plate 9; the second balancing end plate 10 is sleeved on the second end of the rotating shaft 8, and a second oil collecting groove 101 and a third oil-swinging hole 102 are provided on the second balancing end plate 10; the second oil-swinging hole 84 and the third oil-swinging hole 102 are respectively connected to the two ends of the stator winding 3; the second oil inlet 82, the accommodating cavity 81, the first oil-swinging hole 83, the first oil collecting groove 91, the second cooling oil channel 71, the second oil collecting groove 101 and the third oil-swinging hole 102 are connected in sequence.

[0085] The cooling oil enters the accommodating cavity 81 through the second oil inlet 82, and in the process of the rotor 7 driving the rotating shaft 8 to rotate, a part of it passes through the first oil-slinging hole 83, the first oil collecting groove 91, the second cooling oil channel 71, the second oil collecting groove 101 and the third oil-slinging hole 102 in sequence to reach one end of the stator winding 3, and while cooling the rotor 7, one end of the stator winding 3 is also sprayed for cooling; the other part is directly sprayed for cooling the other end of the stator winding 3 through the third oil-slinging hole 102.

[0086] In a specific embodiment, the second cooling oil channel 71 has a plurality of circumferentially spaced second oil channels 71, and the second cooling oil channel 71 is a columnar oil channel extending along the axial direction of the rotor 7. The first balancing end plate 9 has a plurality of circumferentially spaced first oil collecting grooves 91, and the number and position of the first oil collecting grooves 91 correspond to the second cooling oil channel 71 one by one. The second balancing end plate 10 has a plurality of circumferentially spaced second oil collecting grooves 101 and a plurality of third oil-slinging holes 102, and the number and position of the second oil collecting grooves 101 correspond to the second cooling oil channel 71 one by one, and the number and position of the third oil-slinging holes 102 correspond to the second oil collecting grooves 101 one by one. The notch of the first oil collecting groove 91 faces the rotor 7, and the groove wall of one side of the first oil collecting groove 91 extends to the inner ring of the first balancing end plate 9, so as to be connected with the first oil-slinging hole 83 on the rotating shaft 8. The third oil-slinging hole 102 is radially arranged on the outer periphery of the second oil collecting groove 101 and extends to the outer ring of the second balancing end plate 10. The rotor 7 , the first balancing end plate 9 and the second balancing end plate 10 are all press-fitted onto the rotating shaft 8 . The front and rear ends of the rotating shaft 8 are supported by bearings 13 . The bearings 13 are press-fitted inside the housing 1 .

[0087] In one embodiment, the aperture of the first oil-slinging hole 83 is larger than the aperture of the second oil-slinging hole 84, and the first oil-slinging hole 83 is arranged at a position close to the second oil inlet 82. The cooling oil first passes through the first oil-slinging hole 83 and then passes through the second oil-slinging hole 84, ensuring that there is enough cooling oil to first cool the rotor 7 through the second cooling oil channel 71 and then spray the end of the stator winding 3 for cooling; the flow rate of the cooling oil through the first oil-slinging hole 83 and the flow rate of the cooling oil through the second oil-slinging hole 84 are reduced from 7 / 3 to 6 / 4 to obtain a more uniform and effective cooling effect.

[0088] In this embodiment, a portion of the cooling oil entering from the oil inlet channel 11 enters the oil return channel through the first oil chamber 5, the oil inlet, the first cooling oil channel 21, the oil outlet, the second oil chamber 6 and the gap 42 in sequence, so as to cool the inside of the stator core 2 and the stator winding 3 connected to the stator slot 22 of the stator core 2, thereby improving the utilization rate of the cooling oil; another portion of the cooling oil entering from the oil inlet channel 11 directly sprays the end of the stator winding 3 toward one side of the housing 1 through the oil spray hole 41 on the oil guide ring 4; and enters the housing 1 through the second oil inlet 82. During the process of the rotor 7 driving the rotating shaft 8 to rotate, a part of the cooling oil in the cavity 81 passes through the first oil-spinning hole 83, the first oil collecting groove 91, the second cooling oil channel 71, the second oil collecting groove 101 and the third oil-spinning hole 102 in sequence to reach the side of one end of the stator winding 3 facing the rotating shaft 8, and sprays and cools down one end of the stator winding 3 while cooling down the rotor 7; the other part directly sprays and cools down the other end of the stator winding 3 facing the rotating shaft 8 through the third oil-spinning hole 102.

[0089] According to an embodiment of the present invention, on the other hand, a vehicle is provided, comprising the above-mentioned drive motor.

[0090] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the present application.

Claims

1. A driving motor, characterized in that: include: The housing (1) is provided with an oil inlet passage (11) and an oil return passage, wherein the oil inlet passage (11) comprises a first oil inlet port (111) and two oil outlet ports (112); A stator core (2) is fixedly connected to the inside of the housing (1); a plurality of groups of first cooling oil channels (21) are sequentially arranged on the stator core (2) along the circumferential direction, and each group has at least one first cooling oil channel (21); the first cooling oil channel (21) extends along the axial direction, and an oil inlet and an oil outlet of the first cooling oil channel (21) are respectively arranged at two ends of the stator core (2); two outlets (112) are spaced apart and distributed on both sides of the stator along the axial direction, and the oil inlets of two adjacent groups of the first cooling oil channels (21) are respectively connected to the two outlets (112), and the oil outlets are connected to the oil return channel.

2. The drive motor according to claim 1, characterized in that: Also includes: stator winding (3); Two oil guide rings (4) are respectively arranged at the two ends of the stator core (2) and are located between the stator winding (3) and the housing (1); the oil guide ring (4), the housing (1) and the stator core (2) are sealed to form a first oil chamber (5), and the first oil chamber (5) is connected to the oil inlet and the outlet (112); the oil guide ring (4) is provided with an oil injection hole (41), and the oil injection hole (41) is connected to the first oil chamber (5) and the corresponding end of the stator winding (3); the oil guide ring (4) and the stator core (2) are sealed to form a second oil chamber (6), and the second oil chamber (6) is connected to the oil outlet. The oil guide ring (4) is also provided with a notch (42) connecting the second oil chamber (6) and the oil return channel.

3. The drive motor according to claim 1, characterized in that: The inner periphery of the stator core (2) is provided with a stator slot (22), and in the radial direction, at least part of the first cooling oil channel (21) is arranged on a side close to the stator slot (22).

4. The drive motor according to any one of claims 1 to 3, characterized in that: The inner circumference of the stator core (2) is provided with stator slots (22), and the stator core (2) comprises: A first iron core (23) is provided with the stator slot (22) and a first oil hole (231) in sequence along a radially outward direction, wherein the first oil hole (231) is arranged at a position close to the stator slot (22); The second iron core (24) comprises two groups arranged at two ends of the first iron core (23) in the axial direction, and the stator slots (22) and radial oil passages (241) are sequentially arranged in the radial outward direction on the second iron core (24); The third iron core (25) has two groups arranged at intervals in the axial direction, the first iron core (23) and two groups of the second iron core (24) are arranged between the two groups of the third iron core (25); the third iron core (25) is provided with the stator slot (22), a plurality of groups of second oil holes (251) and a plurality of groups of third oil holes (252); the plurality of groups of the second oil holes (251) and the plurality of groups of the third oil holes (252) are cross-distributed in the circumferential direction, the second oil holes (251) and the third oil holes (252) are respectively arranged outside the corresponding stator slot (22) in the radial direction; in the axial direction, the second oil holes (251) of one group of the third iron cores (25) are arranged correspondingly to the third oil holes (252) of the other group of the third iron cores (25); The second oil hole (251) at one end, the radial oil passage (241) at one end, the first oil hole (231), the radial oil passage (241) at the other end and the third oil hole (252) at the other end are connected in sequence to form the first cooling oil passage (21); the second oil hole (251) forms the oil inlet, and the third oil hole (252) forms the oil outlet.

5. The drive motor according to claim 4, characterized in that: The radial oil passage (241) comprises: An oil circuit body extends in a radial direction, and a projection of the third oil hole (252) on the second iron core (24) is located on the corresponding oil circuit body; an external oil port connected to an end of the oil circuit body away from the stator slot (22), wherein a projection of the second oil hole (251) on the second iron core (24) coincides with the corresponding external oil port; An inner oil port is connected to one end of the oil circuit body close to the stator slot (22), and a projection of the first oil hole (231) on the second iron core (24) coincides with the corresponding inner oil port.

6. The driving motor according to claim 2, characterized in that: A first sealing ring (43) is provided between a first ring end of the oil guide ring (4) away from the stator core (2) and the housing (1); a second ring end of the oil guide ring (4) close to the stator core (2) is spaced apart from the housing (1); and a second sealing ring (44) is provided between a side of the second ring end close to the housing (1) and the stator core (2).

7. The driving motor according to claim 2, characterized in that: The oil guide ring (4) is provided with an annular groove (45) on the second ring end close to the stator core (2), the notch of which faces the stator core (2); a second sealing ring (44) and a third sealing ring (46) are provided between the oil guide ring (4) and the stator core (2); the second sealing ring (44) is located on the outer ring of the annular groove (45); the third sealing ring (46) is located on the inner ring of the annular groove (45); the inner ring groove wall of the annular groove (45) and the third sealing ring (46) are both provided with the notch (42).

8. The drive motor according to any one of claims 1 to 3 or 5 to 7, characterized in that: The drive motor also includes: The rotor (7) is provided with a second cooling oil passage (71); A rotating shaft (8) is arranged inside the rotor (7), an accommodating chamber (81) is provided inside the rotating shaft (8), a second oil inlet (82) and a first oil-swinging hole (83) which are communicated with the accommodating chamber (81) are provided on the rotating shaft (8), and the second cooling oil channel (71) is communicated with the first oil-swinging hole (83) and the oil return channel.

9. The driving motor according to claim 8, characterized in that: The drive motor further comprises a stator winding, a first end of the rotating shaft (8) and a second end of the rotating shaft (8) are respectively protruding from the rotor (7), the second oil inlet (82) is arranged at the first end of the rotating shaft (8), and the rotating shaft (8) is further provided with a second oil-spinning hole (84) communicating with the accommodating cavity (81); the first oil-spinning hole (83) and the second oil-spinning hole (84) are both arranged at the second end of the rotating shaft (8); the drive motor further comprises: A first balancing end plate (9) is sleeved on the first oil-slinging hole (83) at the first end of the rotating shaft (8), and a first oil collecting groove (91) is provided on the first balancing end plate (9); A second balancing end plate (10) is sleeved on the second end of the rotating shaft (8); a second oil collecting groove (101) and a third oil-spinning hole (102) are provided on the second balancing end plate (10); the second oil-spinning hole (84) and the third oil-spinning hole (102) are respectively connected to the two ends of the stator winding (3); The second oil inlet (82), the accommodating chamber (81), the first oil-swinging hole (83), the first oil collecting groove (91), the second cooling oil channel (71), the second oil collecting groove (101) and the third oil-swinging hole (102) are sequentially connected.

10. A vehicle, characterized in that: A drive motor comprising any one of claims 1 to 9.

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