Driving motor and vehicle

Abstract

The utility model relates to the technical field of driving motors, and discloses a driving motor and a vehicle, a shell assembly of the driving motor is provided with an oil inlet and an oil return port; the stator iron core is arranged in the shell assembly, and the stator iron core and the shell assembly define a cooling oil duct; the stator winding is connected with the stator iron core; in the axial direction of the stator core, at least one end of the shell assembly is provided with an annular groove extending in the circumferential direction, a groove opening of the annular groove faces the cooling oil channel, the end of the stator core abuts against the end of the inner annular groove wall of the annular groove, and the inner annular groove wall is obliquely arranged. The distance between the outer annular groove wall and the inner annular groove wall of the annular groove is gradually reduced in the direction away from the cooling oil channel. A first oil spraying hole is formed in the wall of the inner ring groove, and the first oil spraying hole is communicated to the end part of the corresponding stator winding; the cooling oil channel or the annular groove is communicated with the oil inlet, and the annular groove is communicated with the oil return opening. The driving motor provided by the utility model has the advantages of simplified structure and reduced assembly difficulty.

Description

TECHNICAL FIELD

[0001] The utility model relates to drive motor technical field, concretely relates to drive motor and vehicle. BACKGROUND

[0002] In recent years, new energy vehicles are coming to the key stage of rapid development, and as one of the core components of new energy vehicles, the motor is also widely concerned by automobile manufacturers and scientific researchers. The drive motor usually has the characteristics of compact structure, high power density and high efficiency, but a large amount of heat will be generated in the process of operation, which will affect the output performance of the motor, so the design of the cooling system that can effectively curb the temperature rise of the drive motor is particularly important.

[0003] The existing drive motor includes an oil-cooled motor cooled by cooling oil. The stator core and the shell of the existing oil-cooled motor form a circumferential and axial flow channel, and the cooling oil flows in the circumferential and axial flow channel to cool the stator. The two ends of the stator core are usually sealed with the oil guide ring and the shell to form an oil cavity, and the cooling oil in the oil cavity is sprayed to the winding end through the spray hole distributed circumferentially on the oil guide ring under the action of oil pressure, and spreads on the surface to cool the end of the stator winding. However, due to the high sealing requirement of the oil cavity, sealing structures need to be arranged between the oil guide ring, the shell and the stator core, which leads to complex structure and high assembly difficulty. SUMMARY

[0004] Therefore, the utility model provides a kind of drive motor and vehicle to solve the problem of complex structure and high assembly difficulty.

[0005] In the first aspect, the utility model provides a kind of drive motor, comprising:

[0006] The shell assembly is provided with an oil inlet and an oil return port;

[0007] The stator core is arranged inside the shell assembly and forms a cooling oil channel with the shell assembly;

[0008] The stator winding is connected with the stator core;

[0009] In the axial direction of the stator core, at least one end of the shell assembly is provided with an annular groove extending in the circumferential direction, the slot opening of the annular groove faces the cooling oil channel, the end of the stator core abuts with the end of the inner ring groove wall of the annular groove, the inner ring groove wall is inclinedly arranged, the distance between the outer ring groove wall of the annular groove and the inner ring groove wall gradually decreases in the direction away from the cooling oil channel; the first oil injection hole is arranged on the inner ring groove wall, and the first oil injection hole is communicated to the end of the corresponding stator winding; the cooling oil channel or the annular groove is communicated with the oil inlet, and the annular groove is communicated with the oil return port.

[0010] Beneficial effects: The cooling oil channel can better cool the middle position of the stator core and the stator winding; the annular groove provided on the shell assembly can be communicated with the cooling oil channel, the circumferential confluence of the cooling oil can be realized, and the end part of the stator winding can be cooled and lowered in temperature by the cooling oil sprayed through the first oil injection hole; the end part of the stator core abuts against the end part of the inner annular groove wall of the annular groove, so that the stator core can be positioned and fixed, and the annular groove and the stator core can be sealed to form an annular oil channel, without the need to provide an oil guide ring, thereby simplifying the structure and reducing the assembly difficulty. Moreover, the inner annular groove wall is provided in an inclined manner, so that the spraying range of the first oil injection hole is expanded, the end part of the stator winding can be better cooled and lowered in temperature, and the first oil injection hole can be conveniently machined on the inner annular groove wall.

[0011] In an alternative embodiment, an oil guide ring is further included, and the shell assembly comprises:

[0012] a shell provided with the oil inlet, a first end of the shell being provided with the annular groove;

[0013] an end cover connected to a second end of the shell;

[0014] the oil guide ring is arranged between the end cover and the second end, the oil guide ring, the second end and the stator core jointly form an annular oil cavity, and the oil guide ring is provided with a second oil injection hole communicated to the end part of the stator winding.

[0015] Beneficial effects: The first end of the shell is provided with the annular groove, and the second end of the shell is provided with the oil guide ring, so that the oil injection cooling of the two ends of the stator winding can be realized by arranging only one oil guide ring, thereby simplifying the structure and reducing the assembly difficulty of the driving motor. The oil guide ring, the shell and the stator core are sealed to form the annular oil cavity, the annular oil cavity can form oil pressure and drainage, and the annular oil cavity is communicated with the cooling oil channel.

[0016] In an alternative embodiment, the first oil injection hole is a semicircular hole.

[0017] In an alternative embodiment, the first oil injection hole is a strip-shaped hole extending in the axial direction.

[0018] In an alternative embodiment, the shell assembly comprises:

[0019] a shell provided with the oil inlet, a first end of the shell being provided with the annular groove;

[0020] an end cover connected to a second end of the shell, the end cover being provided with an annular protruding part obliquely inserted into the second end, the end cover and the second end jointly forming the annular groove, and the annular protruding part being an inner annular groove wall of the annular groove.

[0021] Beneficial effects: the first end of the shell is provided with an annular groove, the second end of the shell and the end cover form an annular groove, and the two ends of the shell do not need to be provided with oil guide rings to realize oil injection cooling of the two ends of the stator winding, simplify the structure, and reduce the assembly difficulty of the driving motor.

[0022] In an alternative embodiment, the first oil injection hole on the annular protrusion is a circular hole.

[0023] In an alternative embodiment, the first oil injection hole is a semicircular hole.

[0024] In an alternative embodiment, the first oil injection hole is a strip-shaped hole extending in the axial direction.

[0025] In an alternative embodiment, the core laminations of the stator core are gear-shaped, the gear teeth of the core laminations are arranged on the outer periphery, and the tooth grooves of the core laminations and the shell assembly form the cooling oil channel.

[0026] Beneficial effects: the stator core is stacked by gear-shaped core laminations, which simplifies the types of core laminations and reduces the mold cost of the core laminations; and the tooth grooves on the outer periphery of the core laminations can form the cooling oil channel with the shell assembly, which can also reduce the outer diameter and weight of the stator core.

[0027] In an alternative embodiment, the cooling oil channel formed by the tooth grooves of the core laminations and the shell assembly extends in the axial direction.

[0028] In an alternative embodiment, the oil inlet communicates with the annular groove.

[0029] In an alternative embodiment, the shell assembly is provided with the annular groove at one end of the stator core, the shell assembly and the other end of the stator core and the oil guide ring form an annular oil cavity, and the oil inlet communicates with the annular oil cavity and / or the annular groove.

[0030] In an alternative embodiment, the core laminations have at least two groups stacked in sequence in the axial direction, each group is stacked with at least two core laminations with matched positions, and the tooth grooves of the core laminations of adjacent two groups are staggered; in the circumferential direction, both sides of the gear teeth of a group of core laminations and the groove walls of the tooth grooves of an adjacent group of core laminations have flow-through intervals.

[0031] In an alternative embodiment, the core laminations have at least two groups stacked in sequence along the axial direction, each group having at least two core laminations stacked in position, the teeth of the core laminations including first teeth and second teeth arranged in sequence in the circumferential direction; in the axial direction, the first teeth of one group of the core laminations partially overlap the second teeth of an adjacent group of the core laminations, and the second teeth of one group of the core laminations are staggered with respect to both the first teeth and the second teeth of an adjacent group of the core laminations.

[0032] In a second aspect, the utility model provides a vehicle, including above-mentioned drive motor. BRIEF DESCRIPTION OF DRAWINGS

[0033] In order to more clearly illustrate the specific embodiment of the utility model or the technical scheme in the related art, the drawings needed to be used in the specific embodiment or related art description will be briefly introduced below, and obviously, the drawings in the following description are some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creating labor.

[0034] Figure 1 It is a sectional view of a drive motor of the embodiment of the utility model;

[0035] Figure 2 It is a partial sectional view of the shell of a drive motor of the embodiment of the utility model;

[0036] Figure 3 It is Figure 2 It is a sectional view along A-A direction;

[0037] Figure 4 It is a schematic diagram of one view angle of a stator core of the embodiment of the utility model;

[0038] Figure 5 It is a schematic diagram of another view angle of a stator core of the embodiment of the utility model;

[0039] Figure 6 It is a schematic diagram of one view angle of another stator core of the embodiment of the utility model;

[0040] Figure 7 It is Figure 6 It is a partial enlarged view;

[0041] Figure 8 It is a schematic diagram of another view angle of another stator core of the embodiment of the utility model;

[0042] Figure 9 It is a schematic diagram of one view angle of still another stator core of the embodiment of the utility model;

[0043] Figure 10 It is another perspective view of the stator core of the embodiment of the utility model;

[0044] Figure 11 It is a sectional view of another driving motor of the embodiment of the utility model;

[0045] Figure 12 It is a partial sectional view of another driving motor of the embodiment of the utility model.

[0046] Mark explanation:

[0047] 11, oil inlet; 12, oil return port; 13, annular groove; 14, first oil injection hole; 15, shell; 16, end cover; 161, annular protruding part; 2, stator core; 21, gear tooth; 211, first tooth; 212, second tooth; 22, tooth slot; 3, stator winding; 4, oil guide ring; 41, second oil injection hole; 5, annular oil cavity; 6, rotor. Specific implementation

[0048] In order to make the purpose, technical scheme and advantage of the embodiment of the utility model more clear, the technical scheme in the embodiment of the utility model will be described clearly and completely below in combination with the drawings in the embodiment of the utility model, obviously, the described embodiment is a part of the embodiment of the utility model, rather than all the embodiment. Based on the embodiment in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the utility model.

[0049] The embodiment of the utility model will be described below in combination with Figures 1 to 12 .

[0050] According to the embodiment of the utility model, on the one hand, a driving motor is provided, which comprises a shell assembly, a stator core 2 and a stator winding 3; the shell assembly is provided with an oil inlet 11 and an oil return port 12; the stator core 2 is arranged inside the shell assembly and forms a cooling oil channel with the shell assembly; the stator winding 3 is connected with the stator core 2; wherein, at least one end of the shell assembly is provided with an annular groove 13 extending in the circumferential direction in the axial direction of the stator core 2, the slot opening of the annular groove 13 faces the cooling oil channel, the end of the stator core 2 abuts against the end of the inner ring groove wall of the annular groove 13, the inner ring groove wall is arranged obliquely, the distance between the outer ring groove wall of the annular groove 13 and the inner ring groove wall gradually decreases in the direction away from the cooling oil channel; the first oil injection hole 14 is arranged on the inner ring groove wall, the first oil injection hole 14 is communicated to the end of the corresponding stator winding 3; the cooling oil channel or the annular groove 13 is communicated with the oil inlet 11, and the annular groove 13 is communicated with the oil return port 12.

[0051] The cooling oil channel can better cool the middle position of the stator core 2 and the stator winding 3; the annular groove 13 provided on the shell assembly can be communicated with the cooling oil channel, the cooling oil in the annular groove 13 can be circumferentially converged, and the cooling oil sprayed through the first oil injection hole 14 can cool the end portion of the stator winding 3; the end portion of the stator core 2 abuts against the end portion of the inner annular groove wall of the annular groove 13, so that the stator core 2 can be positioned and fixed, and the annular groove 13 and the stator core 2 can be sealed to form an annular oil channel, without the need to provide the oil guide ring 4, thereby simplifying the structure and reducing the assembly difficulty of the driving motor. In addition, the inner annular groove wall is provided in an inclined manner, so that the spraying range of the first oil injection hole 14 is expanded, the end portion of the stator winding 3 can be better cooled, and the first oil injection hole 14 can be conveniently machined on the inner annular groove wall.

[0052] In the specific embodiment, the stator includes the stator core 2 and the stator winding 3, the stator winding 3 is arranged at the inner periphery of the stator core 2 and connected with the stator slot of the stator core 2, and the two ends of the stator winding 3 in the axial direction protrude from the stator core 2. The stator is press-fitted in the shell 15 by interference fit.

[0053] In the embodiment, the driving motor further includes the rotor 6, and the stator is sleeved on the outer periphery of the rotor 6. The axial direction and the radial direction mentioned in the embodiment are the axial direction and the radial direction of the rotor 6, respectively. The rotor 6 and the stator are coaxially arranged.

[0054] In one embodiment, as shown in Figures 1 to 3 the driving motor further includes the oil guide ring 4, the shell assembly includes the shell 15 and the end cover 16, the shell 15 is provided with the oil inlet 11, the first end of the shell 15 is provided with the annular groove 13, the end cover 16 is connected to the second end of the shell 15, the oil guide ring 4 is arranged between the end cover 16 and the second end, the oil guide ring 4, the second end and the stator core 2 jointly form the annular oil cavity 5, and the oil guide ring 4 is provided with the second oil injection hole 41 communicated to the end portion of the stator winding 3.

[0055] The first end of the shell 15 is provided with the annular groove 13, the second end of the shell 15 is provided with the oil guide ring 4, and only one oil guide ring 4 is provided, so that the oil injection cooling of the two ends of the stator winding 3 can be realized, the structure is simplified, and the assembly difficulty of the driving motor is reduced. The oil guide ring 4, the shell 15 and the stator core 2 jointly form the annular oil cavity 5, the annular oil cavity 5 can form oil pressure and drainage, and the annular oil cavity 5 is communicated with the cooling oil channel.

[0056] In one specific embodiment, the oil inlet 11 is connected to the annular oil cavity 5. A portion of the cooling oil entering from the oil inlet 11 passes through the annular oil cavity 5 and the cooling oil channel into the annular groove 13 in sequence to cool the inside of the stator core 2 and the stator winding 3 connected to the stator slot 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 11 is directly sprayed onto one end of the stator winding 3 through the second oil spray hole 41. The cooling oil in the annular groove 13 is directly sprayed onto the other end of the stator winding 3 through the first oil spray hole 14.

[0057] In a further embodiment, the first oil injection hole 14 is a semi-circular hole. The semi-circular hole has a small inlet that connects to the annular groove 13, and a large outlet that faces the end of the stator winding 3, forming a fan-shaped oil channel, which can increase the spray area and the effective heat exchange area of ​​the cooling oil. Furthermore, the inclined inner annular groove wall also facilitates the machining of the semi-circular hole on the outer side of the inner annular groove wall.

[0058] In another further embodiment, the first oil injection hole 14 is a strip-shaped hole extending in the axial direction. The strip-shaped hole increases the spray area in the axial direction, thereby increasing the effective heat exchange area of ​​the cooling oil. Furthermore, the strip-shaped hole is easier to machine on the inner annular groove wall.

[0059] In a specific embodiment, the first injection hole 14 has a plurality of holes spaced apart in a circumferential manner.

[0060] In one embodiment, such as Figure 11 and Figure 12 As shown, the housing assembly includes a housing 15 and an end cap 16; the housing 15 is provided with the oil inlet 11, and the first end of the housing 15 is provided with the annular groove 13; the end cap 16 is connected to the second end of the housing 15, and the end cap 16 is provided with an annular protrusion 161 that is inclined to be inserted into the second end. The end cap 16 and the second end together form the annular groove 13, and the annular protrusion 161 is the inner annular groove wall of the annular groove 13.

[0061] The first end of the housing 15 is provided with an annular groove 13, and the second end of the housing 15 and the end cover 16 form an annular groove 13. There is no need to set oil guide rings 4 at both ends of the housing 15, so that oil spray cooling can be achieved at both ends of the stator winding 3, which simplifies the structure and reduces the assembly difficulty of the drive motor.

[0062] In one specific embodiment, the oil inlet 11 is connected to the cooling oil channel. The cooling oil entering through the oil inlet 11 first flows to both ends to fill the cooling oil channel, so as to cool and reduce the temperature of the stator core 2 and the stator winding 3 connected to the stator slot of the stator core 2, thereby improving the utilization rate of the cooling oil. Then, it enters the two annular grooves 13 through the cooling oil channel, and finally sprays oil to both ends of the stator winding 3 through the first oil spray hole 14 to cool it down.

[0063] In a further embodiment, the first oil injection hole 14 on the annular protrusion 161 is a circular hole, which is simple in structure and easy to process.

[0064] In a further embodiment, the first oil injection hole 14 is a semicircular hole. The semicircular hole has a small entrance communicating with the annular groove 13 and a large exit facing the end of the stator winding 3, forming a fan-shaped oil channel to increase the spraying area and the effective heat exchange area of the cooling oil. Moreover, the inner annular groove wall is inclined to facilitate the processing of the semicircular hole on the outer side of the inner annular groove wall. The annular protrusion 161 protrudes from the end cover 16 to facilitate the processing of the first oil injection hole 14.

[0065] In a further embodiment, the first oil injection hole 14 is a strip-shaped hole extending in the axial direction. The strip-shaped hole can increase the spraying area and the effective heat exchange area of the cooling oil in the axial direction. Moreover, the strip-shaped hole is easier to process on the inner annular groove wall. The annular protrusion 161 protrudes from the end cover 16 to facilitate the processing of the first oil injection hole 14.

[0066] In a specific embodiment, the first oil injection hole 14 has a plurality of holes spaced around the circumference.

[0067] As an alternative embodiment, the housing assembly includes a shell 15 and two end covers 16, the two end covers 16 are respectively connected to the two ends of the shell 15, and the annular protrusion 161 is protrudingly arranged on each end cover 16, the annular protrusion 161 is obliquely inserted into the end of the shell 15 and surrounds the annular groove 13 with the end of the shell 15.

[0068] In an embodiment, the core laminations of the stator core 2 are gear-shaped, the gear teeth 21 of the core laminations are arranged on the outer periphery, and the tooth grooves 22 of the core laminations surround the cooling oil channel with the housing assembly.

[0069] The stator core 2 is stacked by gear-shaped core laminations, which simplifies the types of core laminations and reduces the mold cost of the core laminations. Moreover, the tooth grooves 22 on the outer periphery of the core laminations can surround the cooling oil channel with the housing assembly, which can also reduce the outer diameter and weight of the stator core 2.

[0070] In an embodiment, as shown in Figure 4 and Figure 5 the tooth grooves 22 of the core laminations extend in the axial direction.

[0071] The tooth grooves 22 of the core laminations are arranged one by one in the axial direction to form a cooling oil channel extending in the axial direction, and the cooling oil channel has a plurality of holes in the circumferential direction.

[0072] In a further embodiment, the oil inlet 11 is communicated with the annular groove 13 so as to be communicated with all the cooling oil channels extending in the axial direction.

[0073] In a further embodiment, the housing assembly is provided with the annular groove 13 at one end of the stator core 2, the housing assembly and the other end of the stator core 2 and the oil guide ring 4 enclose an annular oil cavity 5, and the oil inlet 11 is communicated with the annular oil cavity 5 and / or the annular groove 13 so as to be communicated with all the cooling oil channels extending in the axial direction.

[0074] In an embodiment, as shown in Figures 6 to 8 the core laminations are stacked in at least two groups in sequence along the axial direction, each group is stacked with at least two core laminations matched in position, and the tooth grooves 22 of the core laminations of adjacent two groups are staggered; in the circumferential direction, both sides of the gear teeth 21 of a group of the core laminations are provided with flow-through intervals between the groove walls of the tooth grooves 22 of an adjacent group of the core laminations.

[0075] The tooth grooves 22 of the core laminations of adjacent two groups are staggered, and in the axial direction, the flow-through intervals and the tooth grooves 22 form axial through cooling oil channels; in the circumferential direction, the S-shaped cooling oil channels are formed through the staggered gear teeth 21 and the flow-through intervals; the cooling oil can flow axially and locally circumferentially in the cooling oil channels, and the cooling effect is better.

[0076] In an embodiment, as shown in Figure 9 and Figure 10 the core laminations are stacked in at least two groups in sequence along the axial direction, each group is stacked with at least two core laminations matched in position, the gear teeth 21 of the core laminations include first teeth 211 and second teeth 212 staggered in sequence along the circumferential direction; in the axial direction, the first teeth 211 of a group of the core laminations partially overlap the second teeth 212 of an adjacent group of the core laminations, and the second teeth 212 of a group of the core laminations are staggered with the first teeth 211 and the second teeth 212 of an adjacent group of the core laminations.

[0077] Through the partial overlap of the first teeth 211 and the second teeth 212 and the mutual staggering of the second teeth 212 and the first teeth 211, the circumferential through flow of the cooling oil can be realized, and at the same time, the effective heat exchange area and the turbulence degree can be increased, and the heat exchange is strengthened.

[0078] According to the embodiments of the utility model, on the other hand, a vehicle is also provided, including the above-mentioned driving motor.

[0079] Although the embodiments of the present application are described in conjunction with the drawings, various modifications and changes can be made by those skilled in the art without departing from the spirit and scope of the present application, and such modifications and changes fall within the scope defined by the present application.

Claims

1. A drive motor, characterized in that, include: The housing assembly is provided with an oil inlet (11) and an oil return outlet (12); The stator core (2) is disposed inside the housing assembly and forms a cooling oil channel with the housing assembly; The stator winding (3) is connected to the stator core (2); In the axial direction of the stator core (2), at least one end of the outer casing assembly is provided with an annular groove (13) extending circumferentially. The groove opening of the annular groove (13) faces the cooling oil passage. The end of the stator core (2) abuts against the end of the inner annular groove wall of the annular groove (13). The inner annular groove wall is inclined. The distance between the outer annular groove wall and the inner annular groove wall of the annular groove (13) gradually decreases in the direction away from the cooling oil passage. A first oil injection hole (14) is provided on the inner annular groove wall. The first oil injection hole (14) is connected to the end of the corresponding stator winding (3). The cooling oil passage or the annular groove (13) is connected to the oil inlet (11). The annular groove (13) is connected to the oil return port (12).

2. The drive motor according to claim 1, characterized in that, It also includes an oil guide ring (4), and the housing assembly includes: The housing (15) is provided with the oil inlet (11), and the first end of the housing (15) is provided with the annular groove (13); End cap (16) is attached to the second end of the housing (15); The oil guide ring (4) is disposed between the end cap (16) and the second end. The oil guide ring (4), the second end, and the stator core (2) together form an annular oil cavity (5). The oil guide ring (4) is provided with a second oil injection hole (41) that connects to the end of the stator winding (3).

3. The drive motor according to claim 2, characterized in that, The first injection hole (14) is a semi-circular hole; And / or, the first injection hole (14) is a strip-shaped hole extending in the axial direction.

4. The drive motor according to claim 1, characterized in that, The housing assembly includes: The housing (15) is provided with the oil inlet (11), and the first end of the housing (15) is provided with the annular groove (13); An end cap (16) is connected to the second end of the housing (15). The end cap (16) has an annular protrusion (161) that is inclined to be inserted into the second end. The end cap (16) and the second end together form the annular groove (13). The annular protrusion (161) is the inner annular groove wall of the annular groove (13).

5. The drive motor according to claim 4, characterized in that, The first oil injection hole (14) on the annular protrusion (161) is a round hole; And / or, the first injection hole (14) is a semi-circular hole; And / or, the first injection hole (14) is a strip-shaped hole extending in the axial direction.

6. The drive motor according to any one of claims 1 to 5, characterized in that, The stator core (2) has a gear-shaped lamination, with the teeth (21) of the lamination disposed on the outer periphery, and the tooth grooves (22) of the lamination and the outer casing assembly forming the cooling oil passage.

7. The drive motor according to claim 6, characterized in that, The grooves (22) of the core laminations and the cooling oil passages formed by the housing assembly extend in the axial direction.

8. The drive motor according to claim 7, characterized in that, The oil inlet (11) is connected to the annular groove (13); Alternatively, the outer casing assembly is provided with the annular groove (13) at one end of the stator core (2), and the outer casing assembly, the other end of the stator core (2), and the oil guide ring (4) form an annular oil cavity (5), and the oil inlet (11) communicates with the annular oil cavity (5) and / or the annular groove (13).

9. The drive motor according to claim 6, characterized in that, The core laminations have at least two sets stacked sequentially along the axial direction, each set having at least two core laminations with matching positions, and the tooth grooves (22) of the two adjacent sets of core laminations are staggered; in the circumferential direction, there is a flow interval between the two sides of the tooth (21) of one set of core laminations and the groove wall of the tooth groove (22) of the adjacent set of core laminations; And / or, the core laminations have at least two sets stacked sequentially along the axial direction, each set having at least two core laminations with matching positions, the teeth (21) of the core laminations include a first tooth (211) and a second tooth (212) arranged sequentially in the circumferential direction; in the axial direction, the first tooth (211) of one set of core laminations partially overlaps with the second tooth (212) of an adjacent set of core laminations, and the second tooth (212) of one set of core laminations is staggered from the first tooth (211) and the second tooth (212) of an adjacent set of core laminations.

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

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