Motor structure, cooling and lubricating system and vehicle

Abstract

The invention discloses a motor structure, a cooling and lubricating system and a vehicle, and relates to the technical field of motor heat dissipation, the motor structure comprises a shell and a motor installed on the shell, and the shell is provided with a stator liquid supply hole; the motor comprises a stator assembly and a rotor assembly, the stator assembly comprises a stator iron core, and the rotor assembly is installed in an inner cavity of the stator assembly; one of the inner wall of the shell and the outer wall of the stator core is provided with convex teeth abutting against the other one, so that a stator cooling liquid channel is defined between the inner wall of the shell and the outer wall of the stator core, and cooling liquid flows into the stator cooling liquid channel through the stator liquid supply hole. According to the technical scheme provided by the invention, the lightweight motor structure is provided.

Description

Technical Field

[0001] The present invention relates to the technical field of motor heat dissipation, and in particular to a motor structure, a cooling and lubrication system and a vehicle. Background Art

[0002] As an important component of electric vehicles, the electric drive system structure has attracted much attention for its structural integration and system reliability. As the electric vehicle powertrain develops towards high voltage, high power and high motor speed, the thermal efficiency and reliability of the motor drive system have become important performance indicators.

[0003] In the current common motor drive systems, cooling pipes are often installed in the motor to cool the motor rotor and stator. However, the additional installation of cooling pipes requires sufficient installation space and accommodation space to be reserved in the motor housing, which will make the overall structure of the motor larger and is not conducive to the lightweight of the motor. Summary of the invention

[0004] The main purpose of the present invention is to provide a motor structure, a cooling and lubrication system and a vehicle, aiming to provide a lightweight motor structure.

[0005] To achieve the above object, the motor structure proposed in the present invention includes:

[0006] a housing having a stator liquid supply hole thereon;

[0007] A motor is housed in the housing, the motor comprises a stator assembly and a rotor assembly installed in an inner cavity of the stator assembly, the stator assembly comprises a stator core;

[0008] Among them, one of the inner wall of the shell and the outer wall of the stator core is provided with a convex tooth abutting against the other, so as to enclose a stator cooling liquid channel between the inner wall of the shell and the outer wall of the stator core, and the coolant flows into the stator cooling liquid channel through the stator liquid supply hole and flows out of the stator cooling liquid channel through the two axial ends of the stator core.

[0009] In one embodiment, the stator core is composed of multiple stator punchings stacked into a cylindrical structure, and at least two protruding teeth are provided on the outer wall of each stator punching, and a stator cooling groove is formed between adjacent protruding teeth; the stator cooling grooves of adjacent stator punchings are connected.

[0010] In one embodiment, the convex teeth on the plurality of stator sheets are arranged the same or differently.

[0011] In one embodiment, along the axial direction of the stator core, the protruding teeth on adjacent stator punching sheets are staggered, or the protruding teeth on adjacent stator punching sheets are arranged in parallel.

[0012] In one embodiment, the convex teeth on the plurality of stator punching sheets are arranged in the same manner, a plurality of groups of convex tooth units are arranged at intervals on the outer wall of the stator punching sheet, and the convex tooth units on adjacent stator punching sheets are arranged in a staggered manner.

[0013] In one embodiment, the stator core includes a plurality of repeatedly stacked punching sheet units, one punching sheet unit includes a plurality of stator punching sheets, the outer walls of the stator punching sheets are provided with positioning notches, and in one punching sheet unit, the positioning notches of different stator punching sheets are located at different positions in the circumferential direction of the stator core;

[0014] In the stator core, a plurality of the positioning notches are connected in sequence and are located on a positioning straight line, and the positioning straight line is parallel to the axis of the stator core.

[0015] In one embodiment, the stator punching sheet is evenly provided with eight convex tooth units, the adjacent convex tooth units differ by 30°, the convex tooth unit includes a first convex tooth and a second convex tooth, and the first convex tooth and the second convex tooth differ by 5°;

[0016] The punching sheet unit includes a first-state punching sheet, a second-state punching sheet and a third-state punching sheet. The first-state punching sheet is provided with a first positioning notch, and the first positioning notch is 5° different from the side of the second convex tooth away from the first convex tooth; the second-state punching sheet is provided with a second positioning notch, and the second positioning notch is 20° different from the side of the second convex tooth away from the first convex tooth; the third-state punching sheet is provided with a third positioning notch, and the third positioning notch is 2.5° different from the side of the first convex tooth toward the second convex tooth.

[0017] In one embodiment, the first state punching sheet, the second state punching sheet and the third state punching sheet respectively include at least one stator punching sheet, and the thickness of the first state punching sheet, the second state punching sheet and the third state punching sheet is respectively greater than or equal to 5 mm.

[0018] In one embodiment, the housing is provided with a liquid inlet, and a transverse liquid channel and a vertical liquid channel both connected to the liquid inlet, the transverse liquid channel is provided with a rotor liquid supply hole, the rotor assembly is provided with a rotor cooling liquid channel, the coolant flows into the rotor cooling liquid channel through the rotor liquid supply hole, and flows out of the rotor cooling liquid channel through the outlet of the rotor cooling liquid channel;

[0019] The vertical liquid channel is provided with the stator liquid supply hole, the shell is provided with a stator axial liquid channel along its axial direction, the stator axial liquid channel is connected with the stator liquid supply hole, the stator axial liquid channel is provided with a stator liquid inlet hole, and the stator liquid inlet hole is connected with the stator cooling liquid channel.

[0020] In one embodiment, the rotor assembly includes a hollow shaft and a rotor core sleeved on the hollow shaft, the open end of the hollow shaft is connected to the rotor liquid supply hole, the hollow shaft is provided with a first liquid throwing port along its radial direction, the rotor core is provided with a second liquid throwing port connected to the first liquid throwing port along its radial direction, the rotor core is provided with a rotor liquid discharge port along its axial direction, and the rotor liquid discharge port is connected to the second liquid throwing port;

[0021] The coolant flows into the hollow shaft through the rotor liquid supply hole, cools the rotor assembly through the first liquid ejection port and the second liquid ejection port, and flows out of the rotor cooling liquid channel through the rotor liquid discharge port.

[0022] In one embodiment, the motor is provided in plurality, the housing is provided with a plurality of motor compartments, one motor is installed in one motor compartment, and the plurality of motor compartments include an upper motor compartment and a lower motor compartment, the upper motor compartment is provided away from the ground, and the lower motor compartment is provided close to the ground;

[0023] The liquid inlet includes an upper liquid inlet and a lower liquid inlet, the transverse liquid channel includes an upper transverse liquid channel connected to the upper liquid inlet, and a lower transverse liquid channel connected to the lower liquid inlet; the vertical liquid channel includes an upper vertical liquid channel and a lower vertical liquid channel, and the upper vertical liquid channel, the lower vertical liquid channel, the upper transverse liquid channel and the lower transverse liquid channel are connected.

[0024] The present invention also provides a cooling and lubricating system, comprising:

[0025] The motor structure; and

[0026] The motor controller is installed at one axial end of the motor structure and is located in the housing. The housing is provided with a controller cooling circuit on a side close to the motor controller, and the liquid inlet is arranged close to the controller cooling circuit.

[0027] In one embodiment, the controller cooling circuit has a cooling inlet and a cooling outlet that are connected to each other, and the cooling inlet is located below the cooling outlet.

[0028] In one embodiment, the cooling and lubrication system also includes a reduction gear, which is transmission-connected to the rotor assembly; a gear inlet and a gear drain are provided on the gear shaft of the reduction gear; the gear inlet is connected to the rotor cooling liquid channel; and the gear drain is used for lubrication between gears.

[0029] The present invention also provides a vehicle, comprising the cooling and lubrication system.

[0030] The technical solution of the present invention is to set a shell and a motor accommodated in the shell in the motor structure, and the shell is provided with a stator liquid supply hole; the motor includes a stator assembly and a rotor assembly, and the stator assembly includes a stator core; one of the inner wall of the shell and the outer wall of the stator core is provided with a convex tooth abutting against the other, so that the inner wall of the shell and the outer wall of the stator core are enclosed to form a stator cooling liquid channel, and the coolant flows into the stator cooling liquid channel through the stator liquid supply hole, thereby cooling the stator core. In this way, on the one hand, compared with the solution in the prior art that requires additional cooling pipelines to be set in the motor housing, the present invention opens holes and slots on the shell and the stator assembly to realize the stator cooling cycle, thereby avoiding the setting of additional pipelines, saving installation space, and being conducive to the lightweight and miniaturization of the motor structure. On the other hand, compared with the commonly used direct spray cooling method, the present invention encloses a stator cooling liquid channel through the inner wall of the shell and the inner wall of the stator core, so that the outer wall surface of the stator core can be cooled, so that the contact area between the stator core and the coolant is larger and the heat dissipation effect is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0032] Figure 1 A schematic structural diagram of an embodiment of a cooling and lubrication system provided by the present invention;

[0033] Figure 2 for Figure 1 A schematic structural diagram of an embodiment of a second housing;

[0034] Figure 3 for Figure 1 A cross-sectional view of an embodiment of a cooling and lubrication system;

[0035] Figure 4 for Figure 3 Schematic diagram of the explosion structure;

[0036] Figure 5 for Figure 4 A partial enlarged view of the middle A;

[0037] Figure 6 for Figure 5 A schematic structural diagram of a stator core of an embodiment of the present invention;

[0038] Figure 7 for Figure 2 A cross-sectional view of an embodiment of a second housing.

[0039] Description of Figure Numbers:

[0040] 100, housing; 101, first housing; 102, second housing; 110, liquid inlet; 111, upper liquid inlet; 112, lower liquid inlet; 120, transverse liquid channel; 121, rotor liquid supply hole; 130, vertical liquid channel; 131, stator liquid supply hole; 140, motor compartment; 141, upper motor compartment; 142, lower motor compartment; 143, collecting tank; 151, upper transverse liquid channel; 152, lower transverse liquid channel; 161, upper vertical liquid channel; 162, lower vertical liquid channel; 170, stator axial liquid channel; 171, stator liquid inlet; 172, winding liquid inlet;

[0041] 200, motor;

[0042] 300, stator assembly; 310, stator core; 311, stator punching sheet; 312, convex teeth; 313, stator cooling groove; 314, positioning straight line; 320, punching sheet unit; 321, first state punching sheet; 322, second state punching sheet; 323, third state punching sheet; 330, winding cooling liquid pipe; 340, convex tooth unit; 341, first convex teeth; 342, second convex teeth; 350, positioning notch; 351, first positioning notch; 352, second positioning notch; 353, third positioning notch;

[0043] 400, rotor assembly; 410, hollow shaft; 411, first liquid throwing port; 420, rotor core; 421, second liquid throwing port; 422, rotor drain port;

[0044] 510, controller cooling circuit; 511, cooling inlet; 512, cooling outlet;

[0045] 600, reduction gear; 610, gear fluid inlet; 620, gear fluid outlet.

[0046] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0047] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only 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 ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0048] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0049] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0050] As an important component of electric vehicles, the electric drive system structure has attracted much attention for its structural integration and system reliability. As the electric vehicle powertrain develops towards high voltage, high power and high motor speed, thermal efficiency and reliability have become important performance indicators.

[0051] In the current common motor drive systems, cooling pipes are often installed in the motor to cool the motor rotor and stator. However, the additional installation of cooling pipes requires sufficient installation space and accommodation space to be reserved in the motor housing, which will make the overall structure of the motor larger and is not conducive to the lightweight of the motor.

[0052] The invention provides a motor structure.

[0053] See also Figures 1 to 3In one embodiment of the present invention, the motor structure includes a housing 100 and a motor 200. The housing 100 is provided with a stator liquid supply hole 121. The motor 200 is accommodated in the housing 100. The motor 200 includes a stator assembly 300 and a rotor assembly 400 installed in the inner cavity of the stator assembly. The stator assembly 300 includes a stator core 310 and a stator winding (not shown). The stator winding is reciprocated in the stator slot (not shown) of the stator core 310 along the axial direction of the motor 200, and has a portion exposed from both ends of the stator core 310. It can be understood that the motor 200 includes an outlet end and a gear end. The outlet end of the motor 200 is an end of the motor 200 with a wire extending therefrom, and the gear end of the motor 200 is an end of the motor 200 with an output shaft connected to the reduction gear 600. The gear end of the rotor shaft in the rotor assembly 400 extends out of the housing 100 to be transmission-connected with the reduction mechanism. The stator core 310 is a hollow cylindrical structure with an inner cavity formed therein. The rotor assembly 400 is installed in the inner cavity of the stator assembly 300 , and the rotor assembly 400 can rotate around the axial center line of the stator assembly 300 .

[0054] One of the inner wall of the housing 100 and the outer wall of the stator core 310 is provided with a protruding tooth 312 abutting against the other, so as to enclose a stator cooling liquid channel between the inner wall of the housing 100 and the outer wall of the stator core 310. The coolant flows into the stator cooling liquid channel through the stator liquid supply hole 121 and flows out of the stator cooling liquid channel through the two axial ends of the stator core 310.

[0055] Specifically, the motor 200 is installed in the housing 100, and the motor 200 and the housing 100 are interference fit, so that the protruding teeth 312 are in contact with the inner wall of the housing 100 or the outer wall of the stator core 310, so that the inner wall of the housing 100 and the outer wall of the stator core 310 enclose a stator cooling liquid channel to cool the stator core 310.

[0056] In one embodiment, the protruding teeth 312 are disposed on the outer wall of the stator core 310. At least two protruding teeth 312 are spaced apart on the outer wall of the stator core 310, and the at least two protruding teeth 312 extend in the axial direction of the stator core 310, so that a stator cooling liquid channel is formed between the protruding teeth 310 and the inner wall of the housing 100.

[0057] Specifically, the housing 100 is interference-fitted with the stator core 310, that is, the inner wall of the housing 100 is in contact with the tooth top of the convex tooth 310, so that a stator cooling liquid channel is enclosed between the inner wall of the housing 100, the outer wall of the stator core 310 and the convex tooth 310 for the coolant to flow. The convex tooth 312 extends in the axial direction of the stator core 310, so that the stator cooling liquid channel can communicate with both ends of the stator core 310, so that the coolant can spread to both ends of the stator core 310, thereby cooling the stator core 310 in the entire axial direction.

[0058] It can be understood that the shell 100 and the stator core 310 are interference fit, and the inner wall of the shell 100 is circular, so the tooth top of the protruding tooth 312 needs to be arc-shaped, so that the inner wall of the shell 100 contacts and abuts against the tooth top of the protruding tooth 312, so as to avoid the coolant overflowing from the contact point between the inner wall of the shell 100 and the protruding tooth 310, so as to ensure the cooling effect of the stator core 310.

[0059] Of course, in other embodiments, at least two protruding teeth 312 may be provided on the inner wall of the housing 100 , and the tooth tops of the protruding teeth 312 may contact the outer wall of the stator core 310 , thereby enclosing a stator cooling liquid channel.

[0060] It can be understood that along the axial direction of the stator core 310, the stator core 310 has a first end and a second end, and there is a gap between the end faces of the first end and the second end and the inner wall of the shell 100. The coolant flows into the stator cooling liquid channel through the stator liquid supply hole 121 to cool the outer surface of the stator core 310, and then flows to the coolant at the two axial ends of the stator core 310, and flows out from the gap between the end faces of the first end and the second end and the inner wall of the shell 100 to leave the outer peripheral wall of the stator core 310. Finally, the coolant is affected by gravity and gathers at the bottom of the shell 100.

[0061] It is understandable that when the motor structure is installed in the vehicle, that is, when the motor structure is in use, the motor structure has an upper part and a bottom, wherein the bottom is arranged close to the ground, and the upper part is located on the side of the bottom away from the ground. In order to make the coolant flow through the entire outer wall surface of the stator core 310 as much as possible, the stator liquid supply hole 121 is arranged on one side of the upper part of the motor structure, so that the coolant spreads on the outer wall surface of the stator core 310 under the action of gravity to improve the cooling effect. When the coolant flows on the stator core 310 to the axial end of the stator core 310, it drips on the bottom of the housing 100 under the action of gravity. In one embodiment, a collecting tank 143 is provided at the bottom of the housing 100, and the collecting tank 143 is used to collect the coolant collected at the bottom after cooling. In one embodiment, a liquid pump (not shown) is provided at the bottom of the housing, and the outlet end of the liquid pump is connected to the liquid inlet 110 so that the coolant in the collecting tank 143 participates in the cooling cycle of the motor again. It can be understood that in order to ensure the temperature of the cooling liquid, a cooler is connected between the liquid pump and the liquid inlet 110 to cool the cooling liquid.

[0062] In order to facilitate the installation of the motor 200 in the housing 100, the housing 100 is set to a split structure. In the scheme shown in the figure of the present invention, along the axial direction of the motor 200, the housing 100 includes a first housing 101 and a second housing 102 (such as Figure 4The first housing 101 and the second housing 102, and the second housing 102 and the third housing can be connected by bolts. However, the present design is not limited thereto. In other embodiments, along the circumference of the motor 200, the housing 100 is formed by splicing a plurality of sub-housings. Here, the split structure of the housing 100 is not limited.

[0063] The technical solution of the present invention is to set a housing 100 and a motor 200 accommodated in the housing 100 in the motor structure, and the housing 100 is provided with a stator liquid supply hole 121; the motor 200 includes a stator assembly 300 and a rotor assembly 400, and the stator assembly 300 includes a stator core 310; one of the inner wall of the housing 100 and the outer wall of the stator core 310 is provided with a convex tooth 312 abutting against the other, so that the inner wall of the housing 100 and the outer wall of the stator core 310 are surrounded by a stator cooling liquid channel, and the coolant flows into the stator cooling liquid channel through the stator liquid supply hole 121, thereby cooling the stator core 310. In this way, on the one hand, compared with the solution in the prior art that requires additional cooling pipelines to be set in the housing of the motor 200, the present invention opens holes and slots on the housing 100 and the stator assembly 300 to realize stator cooling circulation, thereby avoiding the setting of additional pipelines, saving installation space, and being conducive to lightweight and miniaturization of the motor structure. On the other hand, compared with the commonly used direct spray cooling method, the present invention encloses a stator cooling liquid channel through the inner wall of the shell 100 and the inner wall of the stator core 310, so that the outer wall surface of the stator core 310 can be cooled, so that the contact area between the stator core 310 and the coolant is larger and the heat dissipation effect is better.

[0064] See also Figure 4 and Figure 5 In an embodiment of the present invention, the stator core 310 is composed of multiple stator punching sheets 311 stacked into a cylindrical structure, and at least two convex teeth 312 are provided on the outer wall of each stator punching sheet 311, and a stator cooling groove 313 is formed between adjacent convex teeth 312; the stator cooling grooves 313 of adjacent stator punching sheets 311 are connected.

[0065] Specifically, the stator core 310 includes a plurality of stator punching sheets 311, which are stacked axially to form a hollow cylindrical structure. A plurality of protruding teeth 312 are provided on the outer wall of the stator punching sheet 311, and the plurality of protruding teeth 312 are arranged at intervals along the circumference of the stator punching sheet 311, and a stator cooling groove 313 is formed between two adjacent protruding teeth 312, and the stator cooling groove 313 and the inner wall of the housing 100 are enclosed to form a stator cooling liquid channel. The stator cooling grooves 313 of adjacent stator punching sheets 311 are connected, that is, along the axial direction of the stator core 310, the adjacent stator cooling grooves 313 are interconnected, so that the coolant can flow between the adjacent stator cooling grooves 313, so that the coolant can spread in the axial direction of the stator core 310 to cool the outer wall of the stator core 310.

[0066] It can be understood that the stator liquid supply hole 121 is connected to the stator cooling liquid channel, that is, the stator liquid supply hole 121 is connected to at least any one of the stator cooling slots 313, and the coolant flowing into any one of the stator cooling slots 313 flows to the adjacent stator cooling slot 313, and then flows to the first end and the second end of the stator core 310, thereby cooling the stator core 310.

[0067] In an embodiment of the present invention, the convex teeth 312 on the plurality of stator punching sheets 311 are arranged the same or differently. That is, the stator core 310 includes a plurality of stator punching sheets 311, and each stator punching sheet 311 is provided with a convex tooth 312. In one embodiment, the number and spacing of the convex teeth 312 arranged on each stator punching sheet 311 are the same. In this way, the processing and forming of the stator punching sheets 311 are facilitated, and the assembly efficiency of the stator core 310 is improved. In another embodiment, the number or spacing of the convex teeth 312 arranged on at least two stator punching sheets 311 is different, so that a stator cooling liquid channel can also be formed between the stator core 310 and the housing 100.

[0068] In the embodiment of the present invention, along the axial direction of the stator core 310 , the protruding teeth 312 on adjacent stator punching sheets 311 are staggered, or the protruding teeth 312 on adjacent stator punching sheets 311 are arranged in parallel.

[0069] Specifically, see Figure 5 In one embodiment, the protruding teeth 312 of two adjacent stator punching sheets 311 are staggered along the axial direction of the stator core 310. That is, the stator cooling grooves 313 on two adjacent stator punching sheets 311 are partially connected, so that the coolant can spread along the axial direction of the stator core 310 and also spread along the circumferential direction of the stator core 310, thereby increasing the cooling area where the coolant contacts the outer wall surface of the stator core 310 and improving the cooling efficiency.

[0070] In another embodiment, the protruding teeth 312 of two adjacent stator punching sheets 311 are arranged in parallel along the axial direction of the stator core 310. That is, the stator cooling grooves 313 on two adjacent stator punching sheets 311 are connected one by one. In this way, the coolant can also spread along the axial direction of the stator core 310 and on the outer wall of the stator core 310 to cool the stator core 310.

[0071] See also Figure 6 In an embodiment of the present invention, the convex teeth 312 on the multiple stator punching sheets 311 are arranged in the same manner, a plurality of groups of convex tooth units 340 are arranged at intervals on the outer wall of the stator punching sheet 311, and the convex tooth units 340 on adjacent stator punching sheets 311 are arranged in a staggered manner.

[0072] Specifically, in one embodiment, the number, spacing, and other settings of the convex teeth 312 on the multiple stator punching sheets 311 are the same, that is, the settings of the convex teeth 312 on each stator punching sheet 311 in the stator core 310 are the same. A plurality of convex tooth units 340 are arranged at intervals on the outer wall of the stator punching sheet 311, and the convex tooth units 340 on a stator punching sheet 311 are staggered with the convex tooth units 340 on an adjacent stator punching sheet 311. It can be understood that the structure of each stator punching sheet 311 in the stator core 310 is the same, and when the stator punching sheets 311 are stacked, a stator punching sheet 311 can be rotated by a certain angle compared to the adjacent stator punching sheets 311. In this way, it is convenient to process and shape the stator punching sheets 311, and the cooling efficiency of the stator core 310 can also be improved.

[0073] See also Figure 6 In an embodiment of the present invention, the stator core 310 includes a plurality of repeatedly stacked punching units 320, one punching unit 320 includes a plurality of stator punchings 311, and the outer wall of the stator punching 311 is provided with a positioning notch 350, and in one punching unit 320, the positioning notches 350 of different stator punchings 311 are located at different circumferential positions of the stator core 310; in the stator core 310, the plurality of positioning notches 350 are connected in sequence and are located on a positioning straight line 314, and the positioning straight line 314 is parallel to the axis of the stator core 310.

[0074] Specifically, a positioning notch 350 is provided on each stator punching sheet 311. When stacking the stator punching sheets 311, the positioning notches 350 on each stator punching sheet 311 are aligned so that all the positioning notches 350 are on a positioning straight line 314, and the positioning straight line 314 is parallel to the axis of the stator core 310. The provision of the positioning notches 350 improves the accuracy and efficiency of stacking the stator punching sheets 311.

[0075] In order to ensure that the convex tooth units 340 on adjacent stator punching sheets 311 are staggered, the positioning notches 350 on different stator punching sheets 311 are located at different positions in the circumferential direction of the stator core 310. In this way, the coolant can spread along the axial direction of the stator core 310 and also spread along the circumferential direction of the stator core 310, thereby increasing the cooling area where the coolant contacts the outer wall surface of the stator core 310 and improving the cooling efficiency.

[0076] In order to simplify the structure of the stator core 310, the stator core 310 includes multiple groups of repeatedly stacked punching units 320, and one punching unit 320 includes multiple stator punchings 311. In this way, when assembling the stator core 310, the stator punchings 311 can be first assembled into punching units 320, and then the multiple punching units 320 can be assembled in sequence, thereby improving the assembly efficiency of the stator core 310. If a punching unit 320 includes N stator punchings, and the positioning notches 350 on the N stator punchings 311 are respectively located at different positions of the circumference of the stator core 310, it is only necessary to determine the positions of the N positioning notches 350, thereby simplifying the structure of the stator core 310.

[0077] It is worth noting that, in two adjacent punching units 320, the stator cooling groove 313 of the last stator punching 311 in one punching unit 320 needs to be connected with the stator cooling groove 313 of the first stator punching 311 in the other punching unit 320, thereby ensuring that in the stator core 310, the stator cooling grooves 313 of every two adjacent stator punchings 311 are connected, ensuring the connectivity of the stator cooling liquid channel.

[0078] See also Figure 6 In the embodiment of the present invention, eight convex tooth units 340 are evenly arranged on the stator punching sheet 311, and the adjacent convex tooth units 340 differ by 30°. The convex tooth unit 340 includes a first convex tooth 341 and a second convex tooth 342, and the first convex tooth 341 and the second convex tooth 342 differ by 5°. The punching sheet unit 320 includes a first-state punching sheet 321, a second-state punching sheet 322 and a third-state punching sheet 323. The first-state punching sheet 321 is provided with a first positioning notch 351, and the first positioning notch 351 differs by 5° from the side of the second convex tooth 342 away from the first convex tooth 341. The second-state punching sheet 322 is provided with a second positioning notch 352, and the second positioning notch 352 differs by 20° from the side of the second convex tooth 342 away from the first convex tooth 341. The third-state punching sheet 323 is provided with a third positioning notch 353, and the third positioning notch 353 differs by 2.5° from the side of the first convex tooth 341 toward the second convex tooth 342.

[0079] It can be understood that in the scheme shown in the figure of the present invention, a punching unit 320 includes three states of stator punchings 311, and the positioning notches 350 on the stator punchings 311 in the same state are at the same position on the circumference of the stator core 310; the positioning notches 350 on the stator punchings 311 in different states are at different positions on the circumference of the stator core 310. Eight convex tooth units 340 are arranged on a stator punching 311, and a convex tooth unit 340 includes two convex teeth arranged clockwise, namely, a first convex tooth 341 and a second convex tooth 342. Of course, in other embodiments, the first convex tooth 341 and the second convex tooth 342 can also be arranged counterclockwise. There is a 30° difference between adjacent convex tooth units 340, and a 5° difference between the first convex tooth 341 and the second convex tooth 342. In one embodiment, along the circumference of the stator punching 311, the tooth widths of the first convex tooth 341 and the second convex tooth 342 are equal. The first positioning notch 351 is 5° away from the side of the second protruding tooth 342 on the first state punching sheet 321 away from the first protruding tooth 341, the second positioning notch 352 is 20° away from the side of the second protruding tooth 342 on the second state punching sheet 322 away from the first protruding tooth 341, and the third positioning notch 353 is 2.5° away from the side of the first protruding tooth 341 on the third state punching sheet 323 facing the second protruding tooth 342. In this way, the stator cooling grooves on the first state punching sheet 321, the second state punching sheet 322 and the third state punching sheet 323 are connected in sequence, and the stator cooling grooves on the third state punching sheet 323 in one punching sheet unit 320 are connected to the stator cooling grooves on the first state punching sheet 321 in another punching sheet unit 320, thereby ensuring the circulation of the stator cooling liquid channel and simplifying the structure of the stator core.

[0080] Of course, in other embodiments, the first protruding teeth 341 and the second protruding teeth 342 can also be arranged counterclockwise. The punching unit 320 can also include four or other numbers of stator punching sheets 311, one stator punching sheet 311 can also be set to six or other numbers of protruding tooth units 340, one protruding tooth unit 340 can also be provided with three or other numbers of protruding teeth, and in one punching unit 320, the angle between adjacent positioning notches 350 can also be adjusted, as long as adjacent stator cooling slots can be connected.

[0081] In the embodiment of the present invention, the first state punching sheet 321 , the second state punching sheet 322 and the third state punching sheet 323 respectively include at least one stator punching sheet, and the thickness of the first state punching sheet 321 , the second state punching sheet 322 and the third state punching sheet 323 is respectively greater than or equal to 5 mm.

[0082] It is understandable that the thickness of the stator punching sheet 311 is subject to industry standards, which are determined according to the specific specifications and requirements of the motor to ensure the performance, efficiency and stability of the motor. The stator punching sheet 311 will be subjected to relatively large pressure during the assembly process of the stator core 310. In order to avoid the deformation of the convex teeth 313 caused by the stator punching sheet 311 under excessive pressure, the stator punching sheet 311 in each state needs to have a certain thickness. In one embodiment, the thickness of the first state punching sheet 321, the second state punching sheet 322 and the third state punching sheet 323 are respectively greater than or equal to 5 mm to improve the structural strength and ensure the connectivity of the stator cooling liquid channel.

[0083] See also Figure 3 and Figure 4 In an embodiment of the present invention, a liquid inlet 110, a transverse liquid channel 120 and a vertical liquid channel 130 connected to the liquid inlet 110 are provided on the housing 100, a rotor liquid supply hole 121 is opened in the transverse liquid channel 120, and a rotor cooling liquid channel is provided in the rotor assembly 400. The coolant flows into the rotor cooling liquid channel through the rotor liquid supply hole 121 and flows out of the rotor cooling liquid channel through the outlet of the rotor cooling liquid channel.

[0084] Specifically, the liquid inlet 110 is provided on the side of the second housing 102, and is used to supply coolant to flow into the motor to cool and lubricate the motor. The side of the liquid inlet 110 does not occupy the longitudinal space of the motor structure, so as to reduce the longitudinal height of the motor structure, thereby saving longitudinal installation space.

[0085] The transverse liquid channel 120 and the vertical liquid channel 130 are both connected to the liquid inlet 110, wherein the extension direction of the vertical liquid channel 130 is consistent with the height direction of the vehicle, and the extension direction of the transverse liquid channel 120 is perpendicular to the vertical liquid channel 130 and perpendicular to the axial direction of the motor. In the scheme shown in the figure of the present invention, the vertical liquid channel 130 is connected to the liquid inlet 110 through the transverse liquid channel 120. In one embodiment, the vertical liquid channel 130 is connected to the rotor liquid supply hole 121 in the transverse liquid channel 120. In this way, the processing and forming of the transverse liquid channel 120, the vertical liquid channel 130, the liquid inlet 110, the rotor liquid supply hole 121 and the stator liquid supply hole 131 are facilitated.

[0086] The transverse liquid channel 120 is used to provide cooling liquid for the rotor assembly 400. The cooling liquid enters the transverse liquid channel 120 through the liquid inlet 110, enters the rotor assembly 400 through the rotor liquid supply hole 121, and then flows through the rotor cooling liquid channel in the rotor assembly 400, and finally flows out from the outlet of the rotor cooling liquid channel. Under the action of gravity, the cooling liquid is collected in the collection tank 143 at the bottom of the housing 100. In this way, the cooling of the rotor assembly 400 is achieved.

[0087] See also Figure 3 , Figure 4and Figure 7 The vertical liquid channel 130 is provided with a stator liquid supply hole 131; the housing 100 is provided with a stator axial liquid channel 170 along its axial direction, the stator axial liquid channel 170 is connected with the stator liquid supply hole 131, the stator axial liquid channel 170 is provided with a stator liquid inlet hole 171, and the stator liquid inlet hole 171 is connected with the stator cooling liquid channel.

[0088] Specifically, the first shell 101 of the housing 100 is provided with a stator axial liquid channel 170 along its axial direction, one end of the stator axial liquid channel 170 is connected to the stator liquid supply hole 131, and the other end is a closed end. At the same time, the stator axial liquid channel 170 is provided with a stator liquid inlet hole 171 connected to the stator cooling liquid channel. In this way, the stator liquid supply hole 131 is connected to the stator cooling liquid channel through the stator axial liquid channel 170 and the stator liquid inlet hole 171.

[0089] In the scheme shown in the figure of the present invention, the vertical liquid channel 130 is located above the transverse liquid channel 120. In this way, when cooling the stator core 310, the coolant flows into the stator axial liquid channel 170 through the liquid inlet 110, the transverse liquid channel 120, the vertical liquid channel 130, and the stator liquid supply hole 131, and then flows into the stator cooling liquid channel between the inner wall of the first housing 101 and the outer wall of the stator core 310 through the stator liquid inlet hole 171, thereby cooling the outer periphery of the stator core 310. The coolant spreads on the outer periphery of the stator core 310, and flows to the outer wall of the lower side of the stator core 310 under the action of gravity. In this way, the vertical liquid channel 130 is arranged above the horizontal liquid channel 120, that is, the stator liquid inlet hole 171 is arranged above the stator core 310, so that the coolant flows from the top of the stator core 310 to the outer wall of the stator core 310, and then spreads to the outer wall of the lower side of the stator core 310, which is beneficial to improve the coverage rate of the coolant on the outer peripheral wall of the stator core 310, and improve the cooling effect and cooling efficiency.

[0090] In one embodiment, in order to improve the cooling efficiency of the stator core 310, a plurality of stator liquid inlet holes 171 are provided in the stator axial liquid channel 170, and the plurality of stator liquid inlet holes 171 are arranged at intervals to provide more cooling liquid for the stator core 310, and also to increase the initial cooling contact area of ​​the stator core 310. In addition, setting cooling points at different positions of the stator core 310 is conducive to the cooling temperature balance of the stator core 310, and avoids the cooling temperature difference at different positions of the stator core 310.

[0091] See also Figure 3In an embodiment of the present invention, the rotor assembly 400 includes a hollow shaft 410 and a rotor core 420 sleeved on the hollow shaft 410, and the open end of the hollow shaft 410 is connected to the rotor liquid supply hole 121. That is, one end of the hollow shaft 410 is a gear end, which is used for transmission connection with the reduction gear 600, and the other end of the hollow shaft 410 is an outlet end, which is used for communication with the transverse liquid channel 120. The hollow shaft 410 is provided with a first liquid-spinning port 411 along its radial direction, the rotor core 420 is provided with a penetrating second liquid-spinning port 421 along its radial direction, and the second liquid-spinning port 421 is connected to the first liquid-spinning port 411, and the rotor core 420 is provided with a penetrating rotor liquid-discharging port 422 along its axial direction, and the rotor liquid-discharging port 422 is connected to the second liquid-spinning port 421. When the rotor assembly 400 is cooled, the coolant flows from the liquid inlet 110 into the transverse liquid channel 120, and flows into the hollow shaft 410 through the rotor liquid supply hole 121. Under the action of the rotating centrifugal force of the hollow shaft 410, the coolant enters the second liquid outlet 421 through the first liquid outlet 411 to cool the rotor assembly 400, wherein most of the coolant flows out of the rotor cooling liquid channel through the rotor discharge port 422; a small amount of coolant flows out through the second liquid outlet 421, and flows out through the gap between the rotor core 420 and the stator core 310; finally, under the action of gravity, the coolant flows downward and gathers in the collection tank 143 at the bottom of the housing 100.

[0092] In one embodiment, in order to improve the cooling efficiency of the rotor assembly 400, a plurality of first liquid-spinning ports 411 are arranged at intervals along the circumference of the hollow shaft 410, and correspondingly, a plurality of second liquid-spinning ports 421 corresponding to the first liquid-spinning ports 411 are arranged on the rotor core 420. In one embodiment, in order to further improve the cooling efficiency of the rotor assembly 400, a plurality of first liquid-spinning ports 411 are arranged at intervals along the axial direction of the hollow shaft, and correspondingly, a plurality of second liquid-spinning ports 421 corresponding to the first liquid-spinning ports 411 are arranged on the rotor core 420. In this way, the cooling effect of the rotor assembly 400 is improved.

[0093] See also Figure 3 In an embodiment of the present invention, the motor structure further includes two winding cooling liquid pipes 330, which are respectively connected to the stator axial liquid channel 170 and are arranged at both ends of the stator core 310 for cooling the stator winding.

[0094] Specifically, the stator winding has a portion extending from both ends of the stator core 310. To cool the stator winding of this portion, the motor structure further includes two winding cooling liquid pipes 330. The two winding cooling liquid pipes 330 are respectively located at both ends of the stator core 310 and are connected to the stator axial liquid channel 170. In one embodiment, two winding liquid inlet holes 172 are provided on the stator axial liquid channel 170, and one winding liquid inlet hole 172 is connected to one winding cooling liquid pipe 330. A winding spray hole is provided on the winding cooling liquid pipe 330 on one side facing the stator winding.

[0095] The coolant enters the transverse liquid channel 120, the vertical liquid channel 130, the stator liquid supply hole 131, and the stator axial liquid channel 170 through the liquid inlet 110, and then flows into the winding cooling liquid pipe 330 through the winding liquid inlet hole 172, and then sprays on the stator winding through the winding spray hole, thereby cooling the stator winding. Figure 5 As shown, the winding cooling liquid pipe 330 is a semi-annular structure, and the semi-annular winding cooling liquid pipe 330 is arranged on the upper part of the motor structure. The cooling liquid sprayed from the winding spray hole cools the upper stator winding. Under the action of gravity, the cooling liquid spreads along the circumference of the stator winding, thereby cooling the circumference of the stator winding. Finally, under the action of gravity, the cooling liquid flows downward and gathers in the collection tank 143 at the bottom of the housing 100.

[0096] Of course, in other embodiments, the winding cooling liquid pipe 330 may also be configured as a ring structure, and the number of spray holes on the winding cooling liquid pipe 330 may be multiple, which is not limited here.

[0097] See also Figure 3 , Figure 4 and Figure 7 In the embodiment of the present invention, a plurality of motors 200 are provided, and the housing 100 is provided with a plurality of motor cabins 140, one motor 200 is installed in one motor cabin 140, and the plurality of motor cabins 140 include an upper motor cabin 141 and a lower motor cabin 142, the upper motor cabin 141 is arranged far from the ground, and the lower motor cabin 142 is arranged close to the ground;

[0098] The liquid inlet 110 includes an upper liquid inlet 111 and a lower liquid inlet 112, the horizontal liquid channel 120 includes an upper horizontal liquid channel 151 connected to the upper liquid inlet 111, and a lower horizontal liquid channel 152 connected to the lower liquid inlet 112; the vertical liquid channel 130 includes an upper vertical liquid channel 161 and a lower vertical liquid channel 162, and the upper vertical liquid channel 161, the lower vertical liquid channel 162, the upper horizontal liquid channel 151 and the lower horizontal liquid channel 152 are connected.

[0099] Specifically, in one embodiment, the motor structure includes a plurality of motors 200, and the first housing 101 is correspondingly provided with a plurality of motor compartments 140, and one motor 200 is installed in one motor compartment 140. The motor compartment 140 includes an upper motor compartment 141 and a lower motor compartment 142, wherein the upper motor compartment 141 is arranged away from the ground, and the lower motor compartment 142 is arranged close to the ground. It can be understood that each motor 200 and its corresponding motor compartment 140 are interference fit, so that the outer wall of the stator core 310 of the motor 200 and the inner wall of the motor compartment 140 are enclosed to form a stator cooling liquid channel to cool the stator core 310.

[0100] The upper liquid inlet 111 is used to provide cooling liquid for the upper motor, and the lower liquid inlet 112 is used to provide cooling liquid for the lower motor. The upper transverse liquid channel 151 is used to provide cooling liquid for the upper rotor assembly, and the lower transverse liquid channel 152 is used to provide cooling liquid for the lower rotor assembly. The upper vertical liquid channel 161 is used to provide cooling liquid for the upper stator assembly 300, and the lower vertical liquid channel 162 is used to provide cooling liquid for the lower stator assembly 300. The upper vertical liquid channel 161, the lower vertical liquid channel 162, the upper transverse liquid channel 151 and the lower transverse liquid channel 152 are interconnected, so that the cooling liquid circulates in the upper motor compartment 141 and the lower motor compartment 142.

[0101] The motor structure may include 2n motors 200, which may be arranged in two rows of n cases, or 2n motors 200 may be arranged in a row of 2n cases or other arrangements, and specifically, 2n may be an even number such as 2, 4, 6, 8, etc. Alternatively, the motor structure may include 2n+1 motors 200, which may be arranged in a triangle or a straight line or other arrangements, and specifically, 2n+1 may be an odd number such as 3, 5, 7, 9, etc. The specific number and arrangement of the motors 200 may be set according to actual conditions and are not limited here.

[0102] It should be noted that the multiple motor compartments 140 are relatively independent and interconnected. In one embodiment, the collection tank 143 at the bottom of the upper motor compartment 141 is connected to the lower stator axial liquid channel 170 of the lower motor compartment 142, so that the coolant collected in the upper motor compartment 141 can participate in the cooling cycle of the lower motor compartment 142. That is, the coolant sources of the lower motor compartment 142 include two places, one is the coolant flowing in from the liquid inlet 110, and the other is the coolant collected after the upper motor 200 is cooled. It can be understood that the liquid pump mentioned above is arranged in the collection tank 143 of the lower motor compartment 142.

[0103] In the prior art, in order to meet the cooling requirements of the motor 200, multiple cooling oil pipes are designed inside the housing for cooling the stator and winding of the motor 200. However, this design increases the difficulty of housing processing and is not conducive to lightweight and high integration.

[0104] The multi-motor structure in the present invention enables each motor 200 to have an interference fit with its corresponding motor compartment 140, so that the outer wall of each stator core 310 and the inner wall of the motor compartment 140 are enclosed to form a stator cooling liquid channel to cool the stator core 310 without additionally setting up a cooling pipeline for the stator core 310. At the same time, a rotor cooling liquid channel is also provided to cool the rotor assembly 400 without additionally setting up a cooling pipeline for the rotor assembly 400. A winding cooling liquid pipe 330 is also provided to cool the stator winding. In this way, on the one hand, the use of cooling liquid pipes is reduced, the difficulty of installing the cooling liquid pipes is avoided, and the processing difficulty of the housing 100 is also reduced; on the other hand, it is also conducive to the integration, lightweight and low cost of the motor structure; on the other hand, compared with the commonly used direct spraying, the stator core 310 in the present invention has a larger contact area with the coolant and a better heat dissipation effect.

[0105] The present invention also proposes a cooling lubrication system, which includes a motor controller (not shown) and a motor structure. The specific structure of the motor structure refers to the above embodiment. Since the present cooling lubrication system adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here. Among them, the motor controller is installed at one axial end of the motor structure and is located in the housing 100. The housing 100 is provided with a controller cooling circuit 510 on the side close to the motor controller, and the liquid inlet 110 is arranged close to the controller cooling circuit 510.

[0106] In this way, the motor controller is installed in the housing 100, thereby further improving the integration of the cooling and lubrication system. The two axial ends of the motor 200 are respectively the gear end and the outlet end, the gear end is used to connect with the reduction gear 600, and the motor controller is installed at the outlet end of the motor 200. In one embodiment, the motor controller is installed between the second housing 102 and the third housing. In this way, installing the motor controller at one axial end of the motor structure is beneficial to reducing the longitudinal height of the cooling and lubrication system and saving the longitudinal installation space of the cooling and lubrication system. In this way, the motor controller and the motor 200 are arranged in the same shell, which improves the integration of the cooling and lubrication system.

[0107] Generally, in order to ensure the normal operation of the motor controller, it is necessary to provide a controller cooling circuit 510 for the motor controller. In one embodiment, the controller cooling circuit 510 is provided on the side of the second housing 102 away from the first housing 101. That is, the motor controller and the controller cooling circuit 510 are both located between the second housing 102 and the third housing, and the motor controller is located on the side of the controller cooling circuit 510 away from the second housing 102. Thus, the controller cooling circuit 510 is provided close to the motor controller, which is beneficial to the cooling of the motor controller.

[0108] At the same time, the liquid inlet 110 is also arranged close to the controller cooling circuit 510. In one embodiment, the controller cooling circuit 510 is installed on the side of the second housing 102 away from the first housing 101, and the liquid inlet 110 is arranged on the side wall of the second housing 102. In this way, the controller cooling circuit 510 and the liquid inlet 110 of the coolant of the motor 200 are arranged close to each other, which is conducive to improving the cooling efficiency of the controller and the motor 200.

[0109] In the embodiment of the present invention, the controller cooling circuit 510 has a cooling inlet 511 and a cooling outlet 512 that are connected to each other, and the cooling inlet 511 is located below the cooling outlet 512 .

[0110] Specifically, see Figure 2 For the convenience of explanation, the end of the motor structure close to the ground is defined as the lower side, and the end of the motor structure away from the ground is defined as the upper side, wherein the extension direction of the upper side and the lower side is consistent with the height direction of the vehicle. The cooling inlet 511 and the cooling outlet 512 of the controller cooling circuit 510 are provided on the side of the second housing 102. It can be understood that the cooling inlet 511 and the cooling outlet 512 need to be connected to the pipeline to circulate the coolant. The cooling inlet 511 and the cooling outlet 512 are provided on the side so as not to occupy the longitudinal space, thereby further saving the longitudinal installation space.

[0111] In one embodiment, the cooling inlet 511 is located below the cooling outlet 512, so that the coolant flows in from the bottom of the controller cooling circuit 510 and flows out from the top of the controller cooling circuit 510, thereby extending the flow time of the coolant, so that the coolant and the motor controller can fully exchange heat and improve the cooling effect of the motor controller.

[0112] In an embodiment of the present invention, the cooling and lubrication system also includes a reduction gear 600, which is transmission-connected to the rotor assembly 400. The gear shaft of the reduction gear 600 is provided with a gear inlet 610 and a gear drain 620 that are connected to each other. The gear inlet 610 is connected to the rotor cooling liquid channel, and the gear drain 620 is used for lubrication between gears.

[0113] Specifically, see Figure 1 and Figure 3 , the gear inlet 610 extends along the axial direction of the reduction gear 600 and is connected to the hollow shaft 410. The gear drain port 620 extends along the radial direction of the gear and is connected to the gear inlet 610. In this way, the coolant can enter the hollow shaft 410 from the inlet 110 through the transverse liquid channel 120. When the reduction gear 600 rotates, the coolant is thrown out to the meshing surface between the reduction gear 600 and another gear through the gear inlet 610 and the gear drain port 620 under the action of the rotating centrifugal force, so as to be used for lubrication between the gears. In one embodiment, in order to improve the lubrication effect between the gears, a plurality of gear drain ports 620 arranged at intervals are opened on the gear. In this way, by directly opening the gear inlet 610 and the gear drain port 620 on the gear, the setting of the lubrication branch pipe is saved, the difficulty of installing the lubrication branch pipe is avoided, and it is conducive to the lightweight of the cooling and lubrication system.

[0114] In this way, the cooling and lubrication system in the present invention simultaneously solves the cooling of the motor 200, the cooling of the motor controller and the lubrication of the reduction gear 600, thereby improving the integration of the cooling and lubrication system.

[0115] The present invention also proposes a vehicle, which includes a cooling and lubrication system. The specific structure of the cooling and lubrication system refers to the above-mentioned embodiments. Since the vehicle adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0116] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A motor structure, characterized in that: include: a housing having a stator liquid supply hole thereon; A motor is housed in the housing, the motor comprises a stator assembly and a rotor assembly installed in an inner cavity of the stator assembly, the stator assembly comprises a stator core; Among them, one of the inner wall of the shell and the outer wall of the stator core is provided with a convex tooth abutting against the other, so as to enclose a stator cooling liquid channel between the inner wall of the shell and the outer wall of the stator core, and the coolant flows into the stator cooling liquid channel through the stator liquid supply hole and flows out of the stator cooling liquid channel through the two axial ends of the stator core.

2. The motor structure according to claim 1, characterized in that: The stator core is composed of multiple stator punching sheets stacked into a cylindrical structure. At least two convex teeth are arranged on the outer wall of each stator punching sheet, and a stator cooling groove is formed between adjacent convex teeth; the stator cooling grooves of adjacent stator punching sheets are connected.

3. The motor structure according to claim 2, characterized in that: The convex teeth on the stator sheets are arranged the same or differently.

4. The motor structure according to claim 2, characterized in that: Along the axial direction of the stator core, the protruding teeth on adjacent stator punching sheets are staggered, or the protruding teeth on adjacent stator punching sheets are arranged in parallel.

5. The motor structure according to claim 2, characterized in that: The convex teeth on the stator punching sheets are arranged in the same manner, a plurality of groups of convex tooth units are arranged at intervals on the outer wall of the stator punching sheets, and the convex tooth units on adjacent stator punching sheets are arranged in a staggered manner.

6. The motor structure according to claim 5, characterized in that: The stator core comprises a plurality of repeatedly stacked punching sheet units, one punching sheet unit comprises a plurality of stator punching sheets, the outer walls of the stator punching sheets are provided with positioning notches, and in one punching sheet unit, the positioning notches of different stator punching sheets are located at different positions in the circumferential direction of the stator core; In the stator core, a plurality of the positioning notches are connected in sequence and are located on a positioning straight line, and the positioning straight line is parallel to the axis of the stator core.

7. The motor structure according to claim 6, characterized in that: The stator punching sheet is evenly provided with eight convex tooth units, and the difference between adjacent convex tooth units is 30°. The convex tooth unit includes a first convex tooth and a second convex tooth, and the difference between the first convex tooth and the second convex tooth is 5°. The punching sheet unit includes a first-state punching sheet, a second-state punching sheet and a third-state punching sheet. The first-state punching sheet is provided with a first positioning notch, and the first positioning notch is 5° different from the side of the second convex tooth away from the first convex tooth; the second-state punching sheet is provided with a second positioning notch, and the second positioning notch is 20° different from the side of the second convex tooth away from the first convex tooth; the third-state punching sheet is provided with a third positioning notch, and the third positioning notch is 2.5° different from the side of the first convex tooth toward the second convex tooth.

8. The motor structure according to claim 7, characterized in that: The first state punching sheet, the second state punching sheet and the third state punching sheet respectively include at least one stator punching sheet, and the thickness of the first state punching sheet, the second state punching sheet and the third state punching sheet is respectively greater than or equal to 5 mm.

9. The motor structure according to claim 1, characterized in that: The housing is provided with a liquid inlet, and a transverse liquid channel and a vertical liquid channel both connected to the liquid inlet, the transverse liquid channel is provided with a rotor liquid supply hole, the rotor assembly is provided with a rotor cooling liquid channel, the coolant flows into the rotor cooling liquid channel through the rotor liquid supply hole, and flows out of the rotor cooling liquid channel through the outlet of the rotor cooling liquid channel; The vertical liquid channel is provided with the stator liquid supply hole, the shell is provided with a stator axial liquid channel along its axial direction, the stator axial liquid channel is connected with the stator liquid supply hole, the stator axial liquid channel is provided with a stator liquid inlet hole, and the stator liquid inlet hole is connected with the stator cooling liquid channel.

10. The motor structure according to claim 9, characterized in that: The rotor assembly includes a hollow shaft and a rotor core sleeved on the hollow shaft, the open end of the hollow shaft is connected to the rotor liquid supply hole, the hollow shaft is provided with a first liquid throwing port along its radial direction, the rotor core is provided with a second liquid throwing port connected to the first liquid throwing port along its radial direction, the rotor core is provided with a rotor liquid discharge port along its axial direction, and the rotor liquid discharge port is connected to the second liquid throwing port; The coolant flows into the hollow shaft through the rotor liquid supply hole, cools the rotor assembly through the first liquid ejection port and the second liquid ejection port, and flows out of the rotor cooling liquid channel through the rotor liquid discharge port.

11. The motor structure according to any one of claims 1 to 10, characterized in that: There are multiple motors, and the housing is provided with multiple motor cabins. One motor is installed in one motor cabin, and the multiple motor cabins include an upper motor cabin and a lower motor cabin. The upper motor cabin is arranged far from the ground, and the lower motor cabin is arranged close to the ground. The liquid inlet includes an upper liquid inlet and a lower liquid inlet, the transverse liquid channel includes an upper transverse liquid channel connected to the upper liquid inlet, and a lower transverse liquid channel connected to the lower liquid inlet; the vertical liquid channel includes an upper vertical liquid channel and a lower vertical liquid channel, and the upper vertical liquid channel, the lower vertical liquid channel, the upper transverse liquid channel and the lower transverse liquid channel are connected.

12. A cooling and lubrication system, characterized in that: include: The motor structure according to any one of claims 1 to 11; as well as The motor controller is installed at one axial end of the motor structure and is located in the housing. The housing is provided with a controller cooling circuit on a side close to the motor controller, and the liquid inlet is arranged close to the controller cooling circuit.

13. The cooling lubrication system according to claim 12, characterized in that: The controller cooling circuit has a cooling inlet and a cooling outlet which are connected to each other, and the cooling inlet is located below the cooling outlet.

14. The cooling lubrication system according to claim 13, characterized in that: The cooling and lubrication system also includes a reduction gear, which is drivingly connected to the rotor assembly. The gear shaft of the reduction gear is provided with a connected gear inlet and a gear drain. The gear inlet is connected to the rotor cooling liquid channel, and the gear drain is used for lubrication between gears.

15. A vehicle, characterized in that: Comprising a cooling and lubrication system as claimed in any one of claims 12 to 14.

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