Motor

Abstract

The utility model discloses a motor. A stator and a winding are arranged in an installation space of a housing. The first oil injection ring and the second oil injection ring are both arranged in the installation space and arranged on the two sides of the stator respectively, the first oil injection ring, the stator and the shell jointly define a first medium cavity, the first oil injection ring is provided with a first oil injection hole, the first oil injection hole is communicated with the first medium cavity, and the second oil injection ring is provided with a second oil injection hole. The second oil injection ring, the stator and the shell jointly define a second medium cavity, the second oil injection ring is provided with a second oil injection hole, and the second oil injection hole is communicated with the second medium cavity; the stator is provided with a runner which is communicated with the first medium cavity and the second medium cavity; an oil inlet hole and an oil return hole are formed in the side wall of the shell, the oil inlet hole communicates with the first medium cavity or the second medium cavity, and the oil return hole communicates with the installation space. Therefore, a cooling medium flowing in through the oil inlet hole can be sprayed to the winding through the first oil spraying hole and the second oil spraying hole, so that the temperature of the winding is effectively reduced, the working performance of the motor is improved, and the service life of the motor is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, and particularly relates to a motor. Background Art

[0002] In related technologies, the windings of a motor need to be cooled to reduce the temperature of the windings so that the motor has good working performance. However, the existing motors are not reasonably designed and cannot effectively reduce the temperature of the motor windings, resulting in a decline in the working performance of the motor and affecting the service life of the motor. Summary of the Utility Model

[0003] The utility model aims to at least solve one of the technical problems existing in the prior art. For this purpose, an object of the utility model is to provide a motor that can effectively reduce the temperature of the windings, has good working performance, and a long service life.

[0004] The motor according to the utility model includes: a housing, a stator, and windings. The stator and the windings are both arranged in the installation space of the housing; a first oil injection ring and a second oil injection ring. The first oil injection ring and the second oil injection ring are both arranged in the installation space. Along the axial direction of the motor, the first oil injection ring and the second oil injection ring are respectively arranged on both sides of the stator. The first oil injection ring, the stator, and the housing jointly define a first medium cavity. The first oil injection ring has a first oil injection hole, and the first oil injection hole communicates with the first medium cavity and faces the windings. The second oil injection ring, the stator, and the housing jointly define a second medium cavity. The second oil injection ring has a second oil injection hole, and the second oil injection hole communicates with the second medium cavity and faces the windings; the stator has a flow channel, and the flow channel communicates the first medium cavity and the second medium cavity; the side wall of the housing has an oil inlet hole and an oil return hole. The oil inlet hole communicates with the first medium cavity or the second medium cavity, and the oil return hole communicates with the installation space.

[0005] For the motor according to the utility model, the cooling medium flowing in through the oil inlet hole can be respectively sprayed onto the windings through the first oil injection hole and the second oil injection hole to effectively reduce the temperature of the windings, improve the working performance of the motor, and extend the service life of the motor.

[0006] In some examples of the utility model, both the first oil injection ring and the second oil injection ring are in interference fit with the housing in the circumferential direction.

[0007] In some examples of the utility model, the housing has a convex portion protruding towards the installation space, and the first oil injection ring is in interference fit between the convex portion and the stator along the axial direction.

[0008] In some examples of the present utility model, the housing has a recessed portion, and a part of the structure of the second oil injection ring is disposed within the recessed portion and abuts against the side wall of the recessed portion away from the stator, so that the second oil injection ring is in interference fit with the stator in the axial direction.

[0009] In some examples of the present utility model, the axis of the first oil injection hole has an angle with the axial direction, and from the end close to the stator to the end away from the stator, the axis of the first oil injection hole gradually approaches the axis of the motor; and / or, the axis of the second oil injection hole has an angle with the axial direction, and from the end close to the stator to the end away from the stator, the axis of the second oil injection hole gradually approaches the axis of the motor.

[0010] In some examples of the present utility model, the winding includes a crown end and a welding end, the first oil injection hole faces the crown end, and the second oil injection hole faces the welding end.

[0011] In some examples of the present utility model, along the height direction of the motor, the oil inlet hole is located above the oil return hole, and there are multiple oil return holes. Some of the oil return holes correspond to the crown end, and the other part of the oil return holes correspond to the welding end.

[0012] In some examples of the present utility model, both the first medium cavity and the second medium cavity are annular cavities, and there are multiple first oil injection holes and multiple second oil injection holes.

[0013] In some examples of the present utility model, multiple first oil injection holes and multiple second oil injection holes are arranged along the circumferential direction of the motor; along the height direction of the motor, at least some of the first oil injection holes are located in the upper half of the first oil injection ring or at least some of the first oil injection holes are located in the lower half of the first oil injection ring, and at least some of the second oil injection holes are located in the upper half of the second oil injection ring or at least some of the second oil injection holes are located in the lower half of the second oil injection ring. In some examples of the present utility model, the number of the flow channels is multiple, and the multiple flow channels are arranged along the circumferential direction of the motor; at least some of the flow channels are through holes or at least some of the flow channels are grooves.

[0014] The additional aspects and advantages of the present utility model will be partly given in the following description, partly will become obvious from the following description, or will be understood through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The above and / or additional aspects and advantages of the present utility model will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, where:

[0016] Figure 1 is a cross-sectional view of the motor according to an embodiment of the present invention;

[0017] Figure 2 is Figure 1 an enlarged schematic view of a partial structure in (at the first oil injection ring);

[0018] Figure 3 is a schematic view of the first oil injection ring according to an embodiment of the present invention;

[0019] Figure 4 is Figure 3 a cross-sectional view taken along line A-A in;

[0020] Figure 5 is Figure 1 an enlarged schematic view of a partial structure in;

[0021] Figure 6 is Figure 1 an enlarged schematic view of a partial structure in (the recessed part is a toothed groove).

[0022] Reference numerals:

[0023] motor 100;

[0024] housing 10; oil inlet hole 11; oil return hole 12; convex part 13; recessed part 14;

[0025] stator 20; flow channel 21;

[0026] winding 30; crown end 31; welding end 32;

[0027] first oil injection ring 40; first oil injection hole 41; first medium cavity 42;

[0028] second oil injection ring 50; second oil injection hole 51; second medium cavity 52. Detailed Description of the Specific Embodiment

[0029] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0030] Reference is made below to Figures 1-6 describe the motor 100 according to an embodiment of the present invention.

[0031] As Figures 1-6 shown, the motor 100 according to an embodiment of the present invention includes: a housing 10, a stator 20, a winding 30, a first oil injection ring 40, and a second oil injection ring 50.

[0032] Both the stator 20 and the winding 30 are arranged in the installation space of the housing 10; both the first oil injection ring 40 and the second oil injection ring 50 are arranged in the installation space. Along the axis direction of the motor 100, the first oil injection ring 40 and the second oil injection ring 50 are respectively arranged on both sides of the stator 20. The first oil injection ring 40, the stator 20, and the housing 10 jointly define a first medium cavity 42. The first oil injection ring 40 has a first oil injection hole 41, and the first oil injection hole 41 communicates with the first medium cavity 42 and faces the winding 30. The second oil injection ring 50, the stator 20, and the housing 10 jointly define a second medium cavity 52. The second oil injection ring 50 has a second oil injection hole 51, and the second oil injection hole 51 communicates with the second medium cavity 52 and faces the winding 30; the stator 20 has a flow channel 21, and the flow channel 21 communicates the first medium cavity 42 and the second medium cavity 52; the side wall of the housing 10 has an oil inlet hole 11 and an oil return hole 12, the oil inlet hole 11 communicates with the first medium cavity 42 or the second medium cavity 52, and the oil return hole 12 communicates with the installation space.

[0033] Among them, the housing 10 can define an installation space, and both the stator 20 and the winding 30 are arranged in the installation space of the housing 10. The housing 10 can cooperate with the stator 20. As some embodiments of the present application, the housing 10 and the stator 20 are in interference fit.

[0034] Both the first oil injection ring 40 and the second oil injection ring 50 are arranged in the installation space. Along the axis direction of the motor 100 (i.e., Figure 1 the X direction shown), the stator 20 has opposite sides, and the first oil injection ring 40 and the second oil injection ring 50 are respectively arranged on both sides of the stator 20. The first oil injection ring 40, the stator 20, and the housing 10 can jointly define a first medium cavity 42. The first oil injection ring 40 has a first oil injection hole 41, and the number of the first oil injection holes 41 can be multiple. The number of the first oil injection holes 41 can be, but is not limited to, twelve, fourteen, sixteen, etc. As some embodiments of the present application, the number of the first oil injection holes 41 is sixteen. The first oil injection hole 41 is communicated with the first medium cavity 42, and the first oil injection hole 41 can face the winding 30 so that the cooling medium sprays toward the winding 30.

[0035] The second oil injection ring 50, the stator 20, and the housing 10 can jointly define a second medium cavity 52. The second oil injection ring 50 has a second oil injection hole 51, and the number of the second oil injection holes 51 can be multiple. The number of the second oil injection holes 51 can be, but is not limited to, twelve, fourteen, sixteen, etc. As some embodiments of the present application, the number of the second oil injection holes 51 is sixteen. The second oil injection hole 51 is communicated with the second medium cavity 52, and the second oil injection hole 51 can face the winding 30 so that the cooling medium sprays toward the winding 30.

[0036] As some embodiments of the present application, the first oil injection ring 40 and the second oil injection ring 50 may be, but are not limited to, metal stampings, castings, injection molded parts, and other structural parts that meet the oil injection effect.

[0037] The stator 20 has a flow channel 21 , and the flow channel 21 can connect the first medium cavity 42 and the second medium cavity 52 , so that the cooling medium can flow in the first medium cavity 42 and the second medium cavity 52 .

[0038] The side wall of the housing 10 has an oil inlet hole 11 and an oil return hole 12. As some embodiments of the present application, along the height direction of the motor 100 (i.e. Figure 1 The oil inlet hole 11 is arranged above the oil return hole 12, and the oil inlet hole 11 is connected to the first medium cavity 42, or the oil inlet hole 11 is connected to the second medium cavity 52, and the oil return hole 12 is connected to the installation space to recover the cooling medium flowing out of the installation space.

[0039] As some embodiments of the present application, the cooling medium can flow into the first medium cavity 42 through the oil inlet hole 11 of the housing 10, and then a part of the cooling medium will be sprayed from the first oil spray hole 41 toward the winding 30 to cool the winding 30, and another part of the cooling medium will flow along the flow channel 21 to the second medium cavity 52. ​​In this process, the cooling medium can flow along the axial direction of the motor 100 (i.e. Figure 1 The cooling medium takes away the heat of the stator 20 in the X direction as shown. As the oil pressure in the second medium cavity 52 gradually increases, after a dynamic balance relationship of equal oil inlet and outlet is established, the cooling medium will spray toward the winding 30 through the second oil spray hole 51 to cool the winding 30.

[0040] As some embodiments of the present application, the cooling medium sprayed onto the winding 30 will move along the height direction of the motor 100 (i.e. Figure 1 The cooling medium flows downward (in the Z direction shown in the figure) to evenly cool the winding 30, and the cooling medium sprayed onto the winding 30 flows out from the oil return hole 12 under the action of gravity.

[0041] As some embodiments of the present application, the shell 10 can define an oil pool, and the cooling medium flowing out from the oil return hole 12 can flow into the oil pool. The cooling medium in the oil pool can flow into the first medium cavity 42 through the oil inlet hole 11 of the shell 10 under the action of the driving member to form a circulating flow of the cooling medium.

[0042] It should be noted that the motor 100 proposed in the present application can not only allow the cooling medium to be sprayed onto the winding 30 through the first oil spray hole 41 and the second oil spray hole 51 to reduce the temperature of the winding 30, but also allow the cooling medium to reduce the temperature of the stator when flowing in the flow channel 21, thereby improving the working performance of the motor 100 and increasing the service life of the motor 100.

[0043] Moreover, in the present application, the first oil injection ring 40, the stator 20, and the housing 10 can reliably define the first medium cavity 42, and the first medium cavity 42 can be sealed without using a seal. Also, the second oil injection ring 50, the stator 20, and the housing 10 can reliably define the second medium cavity 52, and the second medium cavity 52 can be sealed without using a seal. As a result, the number of components can be reduced, the assembly difficulty of the motor 100 can be decreased, which is beneficial to improving the assembly efficiency of the motor 100. In addition, since seals are saved, the production cost of the motor 100 can be reduced.

[0044] Thus, by jointly defining the first medium cavity 42 by the first oil injection ring 40, the stator 20, and the housing 10, and jointly defining the second medium cavity 52 by the second oil injection ring 50, the stator 20, and the housing 10, and by making the first oil injection hole 41 communicate with the first medium cavity 42 and face the winding 30, and the second oil injection hole 51 communicate with the second medium cavity 52 and face the winding 30, the cooling medium can be evenly sprayed onto the winding 30 to effectively reduce the temperature of the winding 30, improve the working performance of the motor 100, and be beneficial to increasing the service life of the motor 100.

[0045] As some embodiments of the present application, the first oil injection hole 41 and the second oil injection hole 51 respectively correspond to the two end portions of the winding 30, so that the two end portions of the winding 30 can be effectively cooled.

[0046] In some embodiments of the present utility model, as Figure 1 shown, both the first oil injection ring 40 and the second oil injection ring 50 are in circumferential interference fit with the housing 10. That is to say, the first oil injection ring 40 is in circumferential interference fit with the housing 10, and the second oil injection ring 50 is in circumferential interference fit with the housing 10. By making both the first oil injection ring 40 and the second oil injection ring 50 in circumferential interference fit with the housing 10, the first oil injection ring 40, the second oil injection ring 50, and the housing 10 can be reasonably matched, and the first oil injection ring 40, the second oil injection ring 50, and the housing 10 can be closely attached to each other, reducing the probability of cooling medium leakage. Thus, the sealing performance of the first medium cavity 42 and the second medium cavity 52 can be ensured without setting seals, the number of components can be reduced, the assembly difficulty of the motor 100 can be decreased, which is beneficial to improving the assembly efficiency of the motor 100. Moreover, since seals are saved, the production cost of the motor 100 can be reduced.

[0047] In some embodiments of the present utility model, as Figure 1 and Figure 2 shown, the housing 10 has a convex portion 13 protruding towards the installation space, and the first oil injection ring 40 is in interference fit between the convex portion 13 and the stator 20 along the axial direction of the motor 100 (i.e., the X direction shown in Figure 1 ).

[0048] Among them, the housing 10 has a convex portion 13 protruding toward the installation space. As some embodiments of the present application, the housing 10 and the convex portion 13 are configured as an integrally formed part. The integrally formed part has good structural strength. By integrally forming the housing 10 with the first convex portion, the reliability of the connection between the housing 10 and the convex portion 13 can be improved, and the probability of fracture at the connection between the housing 10 and the convex portion 13 can be reduced. The first oil injection ring 40 is in interference fit between the convex portion 13 and the stator 20 along the axis direction of the motor 100 (i.e., Figure 1 the X direction shown). That is to say, along the axis direction of the motor 100 (i.e., Figure 1 the X direction shown), the first oil injection ring 40 is in interference fit with the stator 20, and the first oil injection ring 40 is in interference fit with the convex portion 13.

[0049] By making the housing 10 have a convex portion 13 protruding toward the installation space and making the first oil injection ring 40 in interference fit between the convex portion 13 and the stator 20 along the axis direction of the motor 100 (i.e., Figure 1 the X direction shown), the installation of the first oil injection ring 40 can be made firm, so that the first oil injection ring 40 can withstand a large medium pressure. And because the first oil injection ring 40 is in interference fit between the convex portion 13 and the stator 20 along the axis direction of the motor 100 (i.e., Figure 1 the X direction shown), and the first oil injection ring 40 is in circumferential interference fit with the housing 10, the first oil injection ring 40, the stator 20, and the housing 10 can jointly define a first medium cavity 42 with excellent sealing performance. Without setting a sealing member, the sealing performance of the first medium cavity 42 can be ensured, the number of components can be reduced, the assembly difficulty of the motor 100 can be reduced, which is beneficial to improving the assembly efficiency of the motor 100. In addition, components such as end covers can also be not used to fix the first oil injection ring 40, which is beneficial to further reducing the assembly difficulty of the motor 100, and can also reduce the axial space occupied by the motor 100, facilitating the radial outlet of the three-phase outgoing copper bus.

[0050] In some embodiments of the present invention, as shown in Figure 5 and Figure 6 the housing 10 has a recessed portion 14, and a part of the structure of the second oil injection ring 50 is arranged in the recessed portion 14 and abuts against the side wall of the recessed portion 14 away from the stator 20, so that the second oil injection ring 50 is in interference fit with the stator 20 along the axis direction of the motor 100 (i.e., Figure 1 the X direction shown).

[0051] Among them, the housing 10 has a recess 14, and a partial structure of the second oil injection ring 50 is disposed within the recess 14. Moreover, the second oil injection ring 50 can abut against the side wall of the recess 14 away from the stator 20. Specifically, the recess 14 has a side away from the stator 20 and a side close to the stator 20, and the second oil injection ring 50 can abut against the side wall of the recess 14 away from the stator 20, so that the second oil injection ring 50 is in interference fit with the stator 20 along the axis direction of the motor 100 (i.e., Figure 1 the X direction shown).

[0052] As some embodiments of the present application, as Figure 6 shown, the recess 14 is configured as a toothed groove, and a partial structure of the second oil injection ring 50 is disposed within the toothed groove and abuts against the side wall of the toothed groove away from the stator 20, so that the second oil injection ring 50 is in interference fit with the stator 20 along the axis direction of the motor 100 (i.e., Figure 1 the X direction shown).

[0053] By providing the housing 10 with the recess 14, the second oil injection ring 50 can abut against the side wall of the recess 14 away from the stator 20, and the second oil injection ring 50 can be in interference fit with the stator 20 along the axis direction of the motor 100 (i.e., Figure 1 the X direction shown), which can make the installation of the second oil injection ring 50 firm, enable the second oil injection ring 50 to withstand a large medium pressure. Moreover, since the second oil injection ring 50 is in interference fit with the stator 20 along the axis direction of the motor 100 (i.e., Figure 1 the X direction shown), and the second oil injection ring 50 is in circumferential interference fit with the housing 10, the second oil injection ring 50, the stator 20, and the housing 10 can jointly define a second medium cavity 52 with excellent sealing performance. Without setting a seal, the sealing performance of the second medium cavity 52 can be ensured, the number of components can be reduced, the assembly difficulty of the motor 100 can be reduced, which is beneficial to improving the assembly efficiency of the motor 100. In addition, components such as end caps can also be not used to fix the second oil injection ring 50, which is beneficial to further reducing the assembly difficulty of the motor 100, and can also reduce the axial space occupied by the motor 100, facilitating the radial outlet of the three-phase outgoing copper busbar.

[0054] In some embodiments of the present invention, as Figure 1 , Figure 2 , Figures 4-6 shown, the axis of the first oil injection hole 41 has an angle with the axis direction, and from the end close to the stator 20 to the end away from the stator 20, the axis of the first oil injection hole 41 gradually approaches the axis of the motor 100; and / or, the axis of the second oil injection hole 51 has an angle with the axis direction, and from the end close to the stator 20 to the end away from the stator 20, the axis of the second oil injection hole 51 gradually approaches the axis of the motor 100.

[0055] Among them, the axis of the first fuel injection hole 41 has an included angle with the axis direction of the motor 100 (i.e., Figure 1 the X direction shown). The angle between the axis of the first fuel injection hole 41 and the axis direction of the motor 100 (i.e., Figure 1 the X direction shown) can be adjusted according to the actual situation to change the fuel injection direction of the first fuel injection hole 41, so as to achieve sufficient cooling of the winding 30. The included angle between the axis of the first fuel injection hole 41 and the axis direction of the motor 100 (i.e., Figure 1 the X direction shown) can be but is not limited to 30 degrees, 45 degrees, 60 degrees, etc. As some embodiments of the present application, the included angle is 30 degrees.

[0056] Moreover, along the axis direction of the motor 100 (i.e., Figure 1 the X direction shown), the axis of the first fuel injection hole 41 has an end close to the stator 20 and an end far from the stator 20. From the end close to the stator 20 to the end far from the stator 20, the axis of the first fuel injection hole 41 gradually approaches the axis of the motor 100.

[0057] The axis of the second fuel injection hole 51 has an included angle with the axis direction of the motor 100 (i.e., Figure 1 the X direction shown). The angle between the axis of the second fuel injection hole 51 and the axis direction of the motor 100 (i.e., Figure 1 the X direction shown) can be adjusted according to the actual situation to change the fuel injection direction of the second fuel injection hole 51, so as to achieve sufficient cooling of the winding 30. The included angle between the axis of the second fuel injection hole 51 and the axis direction of the motor 100 (i.e., Figure 1 the X direction shown) can be but is not limited to 30 degrees, 45 degrees, 60 degrees, etc. As some embodiments of the present application, the included angle is 30 degrees.

[0058] Moreover, along the axis direction of the motor 100 (i.e., Figure 1 the X direction shown), the axis of the second fuel injection hole 51 has an end close to the stator 20 and an end far from the stator 20. From the end close to the stator 20 to the end far from the stator 20, the axis of the second fuel injection hole 51 gradually approaches the axis of the motor 100.

[0059] By making the axis of the first fuel injection hole 41 and / or the second fuel injection hole 51 have an included angle with the axis direction of the motor 100 (i.e., Figure 1 the X direction shown), the cooling medium can be sprayed towards the winding 30 at a certain angle, which can increase the spraying area of the cooling medium, make the winding 30 cooler more fully, be beneficial to improving the cooling performance of the motor 100, and extend the service life of the motor 100.

[0060] In some embodiments of the present utility model, such as Figure 1 、 Figure 2, Figure 5 and Figure 6 As shown in Figure 5 and Figure 6 , the winding 30 includes a crown end 31 and a welding end 32. The first oil injection hole 41 faces the crown end 31, and the second oil injection hole 51 faces the welding end 32.

[0061] Among them, the winding 30 includes a crown end 31 and a welding end 32. Along the axis direction of the motor 100 (i.e., Figure 1 the X direction shown), the crown end 31 and the welding end 32 are respectively arranged on both sides of the motor 100. The first oil injection hole 41 faces the crown end 31, and the cooling medium can be sprayed onto the crown end 31 through the first oil injection hole 41 to cool down the crown end 31. The second oil injection hole 51 faces the welding end 32, and the cooling medium can be sprayed onto the welding end 32 through the second oil injection hole 51 to cool down the welding end 32.

[0062] By making the first oil injection hole 41 face the crown end 31 and the second oil injection hole 51 face the welding end 32, the cooling medium can be sprayed onto the crown end 31 and the welding end 32 through the first oil injection hole 41 and the second oil injection hole 51 respectively, which can effectively cool the crown end 31 and the welding end 32 and reduce the probability of overheating of the crown end 31 and the welding end 32.

[0063] In some embodiments of the present invention, as Figure 1 shown, along the height direction of the motor 100 (i.e., Figure 1 the Z direction shown), the oil inlet hole 11 is located above the oil return hole 12, and there are multiple oil return holes 12. Some of the oil return holes 12 correspond to the crown end 31, and the other part of the oil return holes 12 correspond to the welding end 32.

[0064] Among them, along the height direction of the motor 100 (i.e., Figure 1 the Z direction shown), the oil inlet hole 11 is located above the oil return hole 12. That is to say, in space, the installation height of the oil inlet hole 11 is greater than the installation height of the oil return hole 12. And the number of the oil return holes 12 is multiple. The number of the oil return holes 12 can be but is not limited to two, three, four, etc. As some embodiments of the present application, the number of the oil return holes 12 is two. Some of the oil return holes 12 correspond to the crown end 31 to recover the cooling medium sprayed onto the crown end 31, and the other part of the oil return holes 12 correspond to the welding end 32 to recover the cooling medium sprayed onto the welding end 32.

[0065] It can be understood that when the cooling medium is sprayed onto the crown end 31 and the welding end 32, under the action of gravity, the cooling medium can flow downward to sufficiently cool the crown end 31 and the welding end 32. Moreover, the cooling medium can continue to flow downward under the action of gravity. The cooling medium sprayed onto the crown end 31 can flow to the oil return hole 12 corresponding to the crown end 31, and the cooling medium sprayed onto the welding end 32 can flow to the oil return hole 12 corresponding to the welding end 32.

[0066] By arranging the oil inlet hole 11 above the oil return hole 12, and making part of the oil return holes 12 correspond to the crown end 31 and the other part of the oil return holes 12 correspond to the welding end 32, the setting positions of the oil inlet hole 11 and the oil return hole 12 can be made reasonable, enabling the cooling medium to flow downward under the action of gravity to sufficiently cool the crown end 31 and the welding end 32. Moreover, the cooling medium can be recovered through the oil return hole 12, which is beneficial to the recycling of the cooling medium, enabling the motor 100 to be evenly cooled, reducing the probability of excessive local temperature, and being beneficial to increasing the service life of the motor 100.

[0067] In some embodiments of the present utility model, both the first medium cavity 42 and the second medium cavity 52 are annular cavities, and both the first oil injection holes 41 and the second oil injection holes 51 are multiple.

[0068] Among them, the first oil injection ring 40, the stator 20, and the housing 10 can jointly define the first medium cavity 42, the second oil injection ring 50, the stator 20, and the housing 10 can jointly define the second medium cavity 52, and both the first oil injection ring 40 and the second oil injection ring 50 are configured as annular structures.

[0069] Moreover, the number of the first oil injection holes 41 is multiple. The number of the first oil injection holes 41 can be, but is not limited to, twelve, fourteen, sixteen, etc. As some embodiments of the present application, the number of the first oil injection holes 41 is sixteen. The number of the second oil injection holes 51 is multiple. The number of the second oil injection holes 51 can be, but is not limited to, twelve, fourteen, sixteen, etc. As some embodiments of the present application, the number of the second oil injection holes 51 is sixteen.

[0070] As some embodiments of the present application, multiple first oil injection holes 41 are evenly spaced along the circumferential direction 360 degrees of the motor 100.

[0071] As some embodiments of the present application, along the height direction of the motor 100 (i.e., Figure 1 the Z direction shown), multiple first oil injection holes 41 can be all arranged in the upper half of the first oil injection ring 40.

[0072] As some embodiments of the present application, multiple second oil injection holes 51 are evenly spaced along the circumferential direction 360 degrees of the motor 100.

[0073] As some embodiments of the present application, along the height direction of the motor 100 (ie Figure 1 The plurality of second oil injection holes 51 may be disposed in the upper portion of the second oil injection ring 50 (in the Z direction shown).

[0074] By making the first medium cavity 42 and the second medium cavity 52 both annular cavities and providing a plurality of the first oil spray holes 41 and the second oil spray holes 51, the cooling medium can be sprayed evenly toward the winding 30, which is beneficial to uniform cooling of the winding 30 at all locations, and has a good cooling effect, which is beneficial to increasing the service life of the motor 100.

[0075] In some embodiments of the present invention, Figure 3 As shown, the plurality of first oil injection holes 41 and the plurality of second oil injection holes 51 are arranged along the circumferential direction of the motor 100; along the height direction of the motor 100 (i.e. Figure 1 In the Z direction shown in the figure, at least part of the first fuel injection holes 41 are located in the upper half of the first fuel injection ring 40 or at least part of the first fuel injection holes 41 are located in the lower half of the first fuel injection ring 40, and at least part of the second fuel injection holes 51 are located in the upper half of the second fuel injection ring 50 or at least part of the second fuel injection holes 51 are located in the lower half of the second fuel injection ring 50.

[0076] As some embodiments of the present application, multiple first oil injection holes 41 are evenly spaced at any degree along the circumferential direction of the motor 100 . For example, multiple first oil injection holes 41 are evenly spaced at 200 degrees, 270 degrees, and 360 degrees along the circumferential direction of the motor 100 .

[0077] As some embodiments of the present application, multiple second oil injection holes 51 are evenly spaced at any degree along the circumferential direction of the motor 100 . For example, multiple second oil injection holes 51 are evenly spaced at 200 degrees, 270 degrees, and 360 degrees along the circumferential direction of the motor 100 .

[0078] As some embodiments of the present application, along the height direction of the motor 100 (ie Figure 1 The plurality of first oil injection holes 41 are all disposed in the upper half of the first oil injection ring 40 (Z direction as shown).

[0079] As some embodiments of the present application, along the height direction of the motor 100 (ie Figure 1 The plurality of first oil injection holes 41 are all disposed in the lower half of the first oil injection ring 40 (in the Z direction shown).

[0080] As some embodiments of the present application, along the height direction of the motor 100 (ie Figure 1 The plurality of second oil injection holes 51 are all disposed in the upper portion of the second oil injection ring 50 (Z direction as shown).

[0081] As some embodiments of the present application, along the height direction of the motor 100 (ie Figure 1 The plurality of second oil injection holes 51 are all disposed in the lower half of the second oil injection ring 50 (Z direction as shown).

[0082] Such an arrangement enables the cooling medium to be sprayed evenly toward the winding 30 , which is beneficial to evenly cooling all parts of the winding 30 , achieving a good cooling effect, and is beneficial to increasing the service life of the motor 100 .

[0083] It is understandable that if the second oil injection hole 51 is only provided in the upper part of the second oil injection ring 50, the cooling medium sprayed to the upper part of the welding end 32 will flow through the lower part of the welding end 32 under the action of gravity, thereby also being able to achieve sufficient cooling of the welding end 32. Moreover, since the second oil injection hole 51 is only provided in the upper part of the second oil injection ring 50, the number of the second oil injection holes 51 can be reduced to a certain extent, which is conducive to improving the structural strength of the second oil injection ring 50. The same is true for the first oil injection ring 40, the first oil injection hole 41 and the crown end 31, which will not be described in detail here.

[0084] In some embodiments of the present invention, there are multiple flow channels 21, and the multiple flow channels 21 are arranged along the circumferential direction of the motor 100; at least part of the flow channels 21 are through holes or at least part of the flow channels 21 are grooves.

[0085] There are multiple flow channels 21 , which may be, but are not limited to, two, three, four, etc. The multiple flow channels 21 are arranged along the circumferential direction of the motor 100 .

[0086] At least part of the flow channels 21 are through holes or at least part of the flow channels 21 are grooves. As some embodiments of the present application, part of the multiple flow channels 21 may be through holes. As some embodiments of the present application, all of the multiple flow channels 21 are through holes. As some embodiments of the present application, part of the multiple flow channels 21 may be grooves. As some embodiments of the present application, all of the multiple flow channels 21 are grooves.

[0087] For the flow channel 21 configured as a groove, the groove cooperates with the inner wall of the housing to define the flow direction of the cooling medium.

[0088] By providing a plurality of flow channels 21, the stator 20 can be sufficiently cooled and the cooling of the stator 20 can be uniform, which is beneficial to improving the working performance and service life of the motor 100. By providing at least part of the flow channels 21 as through holes or at least part of the flow channels 21 as grooves, the structural form of the flow channels 21 can be selected according to actual needs to reduce the difficulty of producing the stator 20.

[0089] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0090] In the description of the present utility model, the "first feature" and "second feature" may include one or more of such features.

[0091] In the description of the present utility model, the meaning of "a plurality of" is two or more.

[0092] In the description of the present utility model, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through additional features therebetween.

[0093] In the description of the present utility model, the first feature being "above", "over" and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature.

[0094] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples.

[0095] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present utility model, and the scope of the present utility model is defined by the claims and their equivalents.

Claims

1. A motor, characterized in that: include: A housing, a stator and a winding, wherein the stator and the winding are both arranged in an installation space of the housing; A first oil spray ring and a second oil spray ring, wherein the first oil spray ring and the second oil spray ring are both arranged in the installation space, and along the axis direction of the motor, the first oil spray ring and the second oil spray ring are respectively arranged on both sides of the stator, the first oil spray ring, the stator, and the housing jointly define a first medium cavity, the first oil spray ring has a first oil spray hole, the first oil spray hole is connected to the first medium cavity and faces the winding, the second oil spray ring, the stator, and the housing jointly define a second medium cavity, the second oil spray ring has a second oil spray hole, the second oil spray hole is connected to the second medium cavity and faces the winding; The stator has a flow channel, and the flow channel connects the first medium cavity and the second medium cavity; The side wall of the housing has an oil inlet hole and an oil return hole, the oil inlet hole is communicated with the first medium cavity or the second medium cavity, and the oil return hole is communicated with the installation space.

2. The motor according to claim 1, characterized in that The first oil injection ring and the second oil injection ring are both circumferentially interference fit with the housing.

3. The motor according to claim 1, characterized in that The housing has a protruding portion protruding toward the installation space, and the first oil injection ring is interference-fitted between the protruding portion and the stator along the axial direction.

4. The motor according to claim 1, characterized in that The housing has a recessed portion, and a partial structure of the second oil injection ring is disposed in the recessed portion and abuts against a side wall of the recessed portion away from the stator, so that the second oil injection ring is interference-fitted with the stator along the axial direction.

5. The motor according to claim 1, characterized in that The axis of the first oil injection hole has an included angle with the axis direction, and the axis of the first oil injection hole gradually approaches the axis of the motor from an end close to the stator to an end far from the stator; And / or, the axis of the second oil injection hole has an angle with the axis direction, and the axis of the second oil injection hole gradually approaches the axis of the motor from an end close to the stator to an end far from the stator.

6. The motor according to claim 1, characterized in that The winding comprises a crown end and a welding end, the first oil injection hole faces the crown end, and the second oil injection hole faces the welding end.

7. The motor according to claim 6, characterized in that Along the height direction of the motor, the oil inlet hole is located above the oil return hole, and there are multiple oil return holes, some of which correspond to the crown end, and the other part of the oil return holes correspond to the welding end.

8. The motor according to claim 1, characterized in that The first medium cavity and the second medium cavity are both annular cavities, and the first oil injection hole and the second oil injection hole are both multiple.

9. The motor according to claim 8, characterized in that The plurality of first oil injection holes and the plurality of second oil injection holes are arranged along the circumferential direction of the motor; Along the height direction of the motor, at least part of the first fuel injection holes are located in the upper half of the first fuel injection ring or at least part of the first fuel injection holes are located in the lower half of the first fuel injection ring, and at least part of the second fuel injection holes are located in the upper half of the second fuel injection ring or at least part of the second fuel injection holes are located in the lower half of the second fuel injection ring.

10. The motor according to any one of claims 1 to 8, characterized in that: There are multiple flow channels, and the multiple flow channels are arranged along the circumferential direction of the motor; at least part of the flow channels are through holes or at least part of the flow channels are grooves.

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