Motor armature cooling structure, motor and vehicle

Abstract

The utility model provides a motor armature cooling structure, a motor and a vehicle. The motor armature cooling structure provided by the utility model comprises an oil spraying pipe; the oil injection pipe is provided with at least one column of oil injection hole groups which are distributed at intervals in the circumferential direction of the oil injection pipe, each column of oil injection hole group comprises a plurality of first oil injection holes which are distributed at intervals in the axial direction of the oil injection pipe, and the first oil injection holes are formed towards the armature; at least one first oil injection hole in any column of oil injection hole sets and any first oil injection hole in the adjacent column of oil injection hole sets are staggered in the axial direction of the oil injection pipe. The motor armature cooling structure has a good cooling effect on the armature.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, and in particular to a motor armature cooling structure, a motor using the motor armature cooling structure, and a vehicle using the motor. Background Technology

[0002] The armature is the part of an electric motor responsible for generating and transmitting electromagnetic energy, including the iron core and winding assembly. Therefore, the armature generates a significant amount of heat during motor operation. Generally, to improve the stability of the motor, a cooling module is installed to cool the armature.

[0003] In related technologies, the main method for cooling armatures is water cooling. Pipes for supplying cooling water are installed around the armature, and the armature is cooled through heat transfer between the cooling water and the armature.

[0004] However, in the water-cooling method described above, due to the properties of water itself, the cooling water cannot be directly sprayed onto the armature surface, resulting in poor cooling effect on the armature and affecting the stability of the motor. Utility Model Content

[0005] This application provides an armature cooling structure, a motor, and a vehicle, which can improve the cooling effect on the armature and thus enhance the stability of the motor.

[0006] In a first aspect, this application provides a motor armature cooling structure, including an injection pipe; the injection pipe has at least one row of injection holes arranged circumferentially along the injection pipe, each row of injection holes including a plurality of first injection holes arranged axially along the injection pipe, the first injection holes being disposed toward the armature; wherein, at least one first injection hole in any row of injection holes is offset from any first injection hole in the adjacent row of injection holes along the axial direction of the injection pipe.

[0007] As an optional implementation, multiple fuel injection pipes are provided, and two adjacent fuel injection pipes are connected by a connecting oil pipe; the connecting oil pipe has multiple second fuel injection holes facing the armature; wherein, any one of the multiple fuel injection pipes has a fuel inlet, and both ends of the remaining fuel injection pipes are closed ends.

[0008] As an optional implementation, the axial dimension of the distribution area of ​​any row of injection holes in the armature is greater than or equal to the axial dimension of the armature.

[0009] As an optional implementation, the diameter of both the first and second fuel injection holes is 1.5 mm.

[0010] As an optional implementation, the motor armature cooling structure provided in this application further includes a connecting bracket, which has a through hole for the oil injection pipe to pass through; the connecting bracket is used for detachable connection with the motor housing.

[0011] Secondly, this application provides an electric motor, including an electric motor housing, an armature, and the aforementioned electric motor armature cooling structure; an armature cavity for accommodating the armature is formed inside the electric motor housing, and the armature is detachably connected to the electric motor housing; a plurality of electric motor armature cooling structures are distributed around the periphery of the armature and are arranged at intervals along the circumference of the armature, and the plurality of electric motor armature cooling structures are located inside the armature cavity.

[0012] As an optional implementation, the motor provided in this application also includes a rear end cover connected to the motor housing, a first oil inlet channel is formed inside the motor housing, and a second oil inlet channel is formed inside the rear end cover; each motor armature cooling structure is provided with multiple oil injection pipes, and the two ends of one of the multiple oil injection pipes in each motor armature cooling structure are respectively formed as an oil inlet and an oil outlet; the oil inlet is connected to the first oil inlet channel, and the oil outlet is connected to the second oil inlet channel.

[0013] As an optional implementation, a limiting structure is provided on the cavity sidewall of the armature cavity; the limiting structure is used to limit the position of the armature in the axial direction of the armature cavity, and to limit the position of the armature in the radial direction of the armature cavity.

[0014] As an optional implementation, the limiting structure includes a plurality of limiting protrusions arranged circumferentially along the armature cavity, the limiting protrusions including a first limiting surface and a second limiting surface connected together; the armature includes an iron core, the first limiting surface extends circumferentially along the iron core and transitionally engages with the outer circumferential surface of the iron core, and the second limiting surface stops at the end of the iron core; in the axial direction of the armature, the size of the first limiting surface is one-quarter of the armature size.

[0015] As an alternative implementation, the armature has a lug, which is connected to the motor housing by bolts; two stacked washers are provided between the bolt head and the lug, each washer having multiple meshing teeth, and the opposite sides of the two washers mesh together; in the axial direction of the bolt, the maximum size of the meshing teeth is greater than the pitch of the bolt.

[0016] Thirdly, this application provides a vehicle including the aforementioned motor.

[0017] The motor armature cooling structure, motor, and vehicle provided in this application include an injection pipe for flowing cooling oil. The injection pipe has multiple rows of injection holes arranged circumferentially along the injection pipe. Each injection hole group includes multiple first injection holes arranged axially along the injection pipe. The first injection holes are positioned towards the armature. The multiple first injection holes in two adjacent rows of injection hole groups are staggered in the axial direction of the injection pipe.

[0018] Thus, when the armature is cooled using the motor armature cooling structure provided in this embodiment, on the one hand, the cooling oil in the oil injection pipe can be directly sprayed onto the armature through the first oil injection hole to achieve direct cooling and temperature reduction of the armature surface. Compared with the indirect cooling method in related technologies, this can improve the cooling effect of the armature.

[0019] On the other hand, since at least one first oil injection hole in any column of the oil injection hole group is offset from any first oil injection hole in the adjacent column of the oil injection hole group along the axial direction of the oil injection pipe, the cooling oil sprayed on the armature surface can be evenly distributed, so that the temperature of each part of the armature surface is close to uniform, further improving the cooling effect of the motor armature cooling structure provided in this embodiment on the armature. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the first partial structure of the motor provided in an embodiment of this application;

[0021] Figure 2 for Figure 1 A structural diagram from another perspective;

[0022] Figure 3 A schematic diagram of a motor armature cooling structure provided in an embodiment of this application;

[0023] Figure 4 This is another schematic diagram of the motor armature cooling structure provided in the embodiments of this application;

[0024] Figure 5 for Figure 4 A sectional view of the local structure;

[0025] Figure 6 This is a schematic diagram of the second partial structure of the motor provided in an embodiment of this application;

[0026] Figure 7 for Figure 3 A schematic diagram of the connecting bracket in the structure shown;

[0027] Figure 8 This is a schematic diagram of the structure of the motor provided in an embodiment of this application;

[0028] Figure 9 for Figure 4 A schematic diagram of the connecting bracket in the structure shown;

[0029] Figure 10 for Figure 8 A cross-sectional view along the AA direction;

[0030] Figure 11 for Figure 10 Enlarged schematic diagram of the local structure at point B;

[0031] Figure 12 A schematic diagram of the third partial structure of the motor provided in an embodiment of this application;

[0032] Figure 13 for Figure 12 A sectional view along the CC direction;

[0033] Figure 14 for Figure 13 Enlarged schematic diagram of the local structure at point D;

[0034] Figure 15 A three-dimensional structural diagram of the motor housing in the motor provided in the embodiments of this application;

[0035] Figure 16 for Figure 15 A magnified view of the local structure at point E in the middle;

[0036] Figure 17 This is a schematic diagram of the fourth partial structure of the motor provided in the embodiments of this application;

[0037] Figure 18 for Figure 17 Enlarged schematic diagram of the local structure at point F;

[0038] Figure 19 This is a three-dimensional structural diagram of the gasket in the motor provided in an embodiment of this application.

[0039] Explanation of reference numerals in the attached figures:

[0040] 1. Fuel injection pipe; 2. Connecting fuel pipe; 3. Connecting bracket; 4. Sealing plug;

[0041] 10. Motor armature cooling structure; 1a. First fuel injection pipe; 1b. Second fuel injection pipe; 1c. Third fuel injection pipe; 1d. Fourth fuel injection pipe; 1e. Fifth fuel injection pipe; 1f. Sixth fuel injection pipe; 11. First fuel injection hole; 12. Fuel inlet; 13. Fuel outlet; 20. Armature; 21. Second fuel injection hole; 31. Through hole; 32. Weight reduction hole; 33. Connecting hole; 30. Motor housing; 40. Rear end cover; 50. Limiting protrusion; 60. Bolt; 70. Gasket;

[0042] 201. Iron core; 202. Crown end; 203. Welded end; 204. Lug; 31a. First through hole; 31b. Second through hole; 31c. Third through hole; 31d. Fourth through hole; 32a. First weight reduction hole; 32b. Second weight reduction hole; 32c. Third weight reduction hole; 301. Armature cavity; 302. First oil inlet; 401. Second oil inlet; 501. First limiting surface; 502. Second limiting surface; 601. Bolt head; 701. Meshing teeth; 100. Motor;

[0043] 2041, Threaded hole. Detailed Implementation

[0044] The technical solutions in this application will be clearly and thoroughly described below with reference to the accompanying drawings. In the description of the embodiments of this application, unless otherwise stated, " / " means "or," for example, A / B can mean A or B. "And / or" in the text is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Furthermore, in the description of the embodiments of this application, "multiple" refers to two or more than two.

[0045] Hereinafter, the terms "first" and "second" are used for descriptive purposes only and should not be construed as implying or suggesting relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0046] In related technologies, the main method for cooling the armature is water cooling. Pipes for supplying cooling water are installed around the armature, and cooling is achieved through heat transfer between the cooling water and the armature. However, in this water cooling method, due to the inherent properties of water, the cooling water cannot be directly sprayed onto the armature surface, resulting in poor cooling effect and affecting the stability of the motor.

[0047] Based on this, embodiments of this application provide a motor armature cooling structure, a motor, and a vehicle. In the motor armature cooling structure, the cooling oil in the fuel injection pipe can be directly sprayed onto the armature, thereby effectively cooling the armature. In addition, by limiting the number of fuel injection holes on the fuel injection pipe, the cooling oil can be sprayed evenly onto the armature, thereby further improving the cooling effect on the armature.

[0048] The embodiments of this application will be described in detail below with reference to the accompanying drawings and specific implementation details.

[0049] Please combine Figures 1 to 4 , Figure 1 This is a schematic diagram of the first partial structure of the motor provided in an embodiment of this application. Figure 2 for Figure 1 A structural diagram from another perspective. Figure 3 This is a schematic diagram of a motor armature cooling structure provided in an embodiment of this application. Figure 4 This is another schematic diagram of the motor armature cooling structure provided in the embodiments of this application.

[0050] As shown in the figure, this embodiment provides a motor armature cooling structure 10, including an oil injection pipe 1, in which cooling oil flows. The oil injection pipe 1 has at least one row of oil injection holes arranged circumferentially along the oil injection pipe 1. Each row of oil injection holes includes a plurality of first oil injection holes 11 arranged axially along the oil injection pipe 1. The first oil injection holes 11 are disposed facing the armature 20. In any row of oil injection holes, at least one first oil injection hole 11 is offset from any first oil injection hole 11 in the adjacent row of oil injection holes along the axial direction of the oil injection pipe 1.

[0051] Thus, when the armature 20 is cooled by the motor armature cooling structure 10 provided in this embodiment, on the one hand, the cooling oil in the oil injection pipe 1 can be directly sprayed onto the armature 20 through the first oil injection hole 11 to achieve direct cooling and temperature reduction of the surface of the armature 20. Compared with the indirect cooling method in related technologies, the cooling effect of the armature 20 can be improved.

[0052] On the other hand, since at least one first oil injection hole 11 in any column of the oil injection hole group is staggered from any first oil injection hole 11 in the adjacent column of the oil injection hole group along the axial direction of the oil injection pipe 1, the cooling oil sprayed on the surface of the armature 20 can be evenly distributed, so that the temperature of each part of the surface of the armature 20 is close to uniform, further improving the cooling effect of the motor armature cooling structure 10 provided in this embodiment on the armature 20.

[0053] The arrangement of the first injection holes 11 in the adjacent column injection hole group can be such that some of the first injection holes 11 in one column injection hole group are offset from each other along the axial direction of the injection pipe 1, while another part of the first injection holes 11 are aligned with some of the first injection holes 11 in the adjacent column injection hole group.

[0054] Of course, it is understandable that if each pair of first injection holes 11 in two adjacent rows of injection holes can be staggered from each other along the axial direction of the injection pipe 1, the uniformity of the distribution of cooling oil sprayed on the surface of the armature 20 will be higher.

[0055] Therefore, in some specific embodiments, each first injection hole 11 in any column of injection hole groups is offset from each first injection hole 11 in the adjacent column of injection hole groups along the axial direction of the injection pipe 1. That is, the multiple first injection holes 11 in two adjacent columns of injection hole groups are arranged in a one-to-one correspondence, and the corresponding two first injection holes 11 are offset from each other along the axial direction of the injection pipe 1. Here, there is no specific limitation on the arrangement of the first injection holes 11 in two adjacent columns of injection hole groups.

[0056] In some specific embodiments, the axial direction of the fuel injection pipe 1 is aligned with the axial direction of the armature 20.

[0057] Regarding the number of first injection holes 11 provided on the injection pipe 1, in this specific embodiment, there can be 42. This ensures a uniform distribution of cooling oil flow on both sides of the armature 20.

[0058] like Figure 3 and Figure 4 As shown, it can be understood that the more fuel injection pipes 1 are provided, the better the cooling effect of the motor armature cooling structure 10 on the armature provided in this embodiment. Therefore, in this embodiment, multiple fuel injection pipes 1 are provided, and two adjacent fuel injection pipes 1 are connected by a connecting oil pipe 2.

[0059] In this embodiment, the oil injection pipe 1 and the connecting oil pipe 2 are connected by welding. However, due to process limitations, a first oil injection hole 11 cannot be formed at the weld joint between the oil injection pipe 1 and the connecting oil pipe 2. This could result in the armature 20 not being sprayed with cooling oil in that axial region. To overcome this defect, in some specific embodiments, the connecting oil pipe 2 has multiple second oil injection holes 21 facing the armature 20. This allows the motor armature cooling structure 10 provided in this embodiment to spray cooling oil onto the armature 20 over a larger area along the axial direction of the armature 20, thus avoiding insufficient local cooling to a certain extent and resulting in a better cooling effect for the armature 20 provided by the motor armature cooling structure 10 in this embodiment.

[0060] It should be noted that in some embodiments, the connecting oil pipe 2 extends circumferentially along the armature 20, and two second oil injection holes 21 are provided on the connecting oil pipe 2, which are spaced apart circumferentially along the armature 20. Here, there is no specific limitation on the number of second oil injection holes 21.

[0061] Furthermore, by setting up the connecting oil pipe 2 as described above, the structural strength of the motor armature cooling structure 10 provided in this embodiment can be improved, thereby extending the service life of the motor armature cooling structure 10 provided in this embodiment.

[0062] In the motor armature cooling structure 10 provided in this embodiment, an oil inlet 12 is formed on any one of the plurality of oil injection pipes 1, while both ends of the remaining oil injection pipes 1 are closed. That is to say, only one oil injection pipe 1 needs to be provided with an oil inlet 12. After the gear oil enters one oil injection pipe 1 through the oil inlet 12, it reaches another oil injection pipe 1 through the connecting oil pipe 2. This configuration simplifies the design of the motor armature cooling structure 10 provided in this embodiment and reduces the processing cost of the motor armature cooling structure 10 provided in this embodiment.

[0063] Please continue to combine Figure 5 , Figure 5 for Figure 4 A partial sectional view of the structure is shown. As illustrated, for the fuel injection pipe 1 without an inlet 12, sealing heads 4 can be installed at both ends to seal the corresponding pipe openings. The connection between the sealing head 4 and the fuel injection pipe 1 can be a threaded fit or an interference fit, etc. Here, no specific restrictions are placed on the connection method between the sealing head 4 and the fuel injection pipe 1.

[0064] Furthermore, the armature 20 includes an iron core 201 and crown ends 202 and weld ends 203 disposed at opposite ends of the iron core 201. The crown ends 202 are used to fix and support the commutator or other current collectors, and the weld ends 203 are used to weld the leads of the armature winding to the commutator.

[0065] If cooling oil can be sprayed onto the entire armature 20 region from the crown end 202 to the weld end 203 along the axial direction of the armature 20, the armature 20 can be effectively cooled. Therefore, in some optional embodiments, the axial dimension of the distribution area of ​​any row of oil injection holes along the axial direction of the armature 20 is greater than or equal to the axial dimension of the armature 20.

[0066] In other words, the multi-row oil injection hole group extends to the crown end 202 and the welding end 203, which can simultaneously cool the crown end 202 and the welding end 203, thereby reducing the temperature of the crown end 202 and the welding end 203 and achieving effective cooling of the armature 20.

[0067] It is understandable that if the diameter of the first oil injection hole 11 and the second oil injection hole 21 is small, it will affect the flow rate of the cooling oil and have an adverse effect on the cooling effect of the armature 20; if the diameter of the first oil injection hole 11 and the second oil injection hole 21 is large, the pressure of the oil sprayed from the first oil injection hole 11 and the second oil injection hole 21 will be low, which will also have an adverse effect on the cooling effect of the armature 20.

[0068] Therefore, in this embodiment, the diameters of the first oil injection hole 11 and the second oil injection hole 21 are limited to a certain extent. Specifically, the diameters of both the first oil injection hole 11 and the second oil injection hole 21 are 1.5 mm. This makes the diameters of the first oil injection hole 11 and the second oil injection hole 21 a relatively moderate value, which on the one hand can meet the flow rate requirements of the cooling oil, and on the other hand can meet the pressure requirements of the oil sprayed from the first oil injection hole 11 and the second oil injection hole 21, so as to improve the cooling effect on the armature 20. In this way, even at a minimum flow rate of 10 L / min, the gear oil can be sprayed onto the outer wall of the iron core 201 in a pressurized manner to achieve effective cooling of the armature 20.

[0069] Please combine Figure 6 , Figure 6 This is a schematic diagram of the second partial structure of the motor provided in this embodiment. Of course, to ensure the stability of the cooling oil flow in the injection pipe 1 and the connecting oil pipe 2, the oil pipes need to be fixed. Therefore, the motor armature cooling structure 10 provided in this embodiment also includes a connecting bracket 3, which has a through hole 31 through which the injection pipe 1 passes; the connecting bracket 3 is used for detachable connection with the motor housing 30. In this way, the motor armature cooling structure 10 provided in this embodiment can be fixed to the motor housing 30, thereby improving the stability of the motor armature cooling structure 10 in use.

[0070] In some specific embodiments, the connecting bracket 3 and the motor housing 30 are connected by threaded fasteners. Therefore, the connecting bracket 3 has connecting holes 33 for the threaded fasteners to pass through. Of course, in order to improve the connection reliability between the connecting bracket 3 and the motor housing 30, and to achieve the connection reliability between the motor armature cooling structure 10 and the motor housing 30 provided in this embodiment, multiple spaced connecting holes 33 can be provided on the connecting bracket 3, for example, two. Here, there is no specific limitation on the number of connecting holes 33.

[0071] It is understandable that if weight-reducing holes 32 are provided on the connecting bracket 3, the weight of the connecting bracket 3 will be reduced, so as to facilitate the connection and assembly between the connecting bracket 3 and the motor housing 30. Therefore, in this embodiment, multiple weight-reducing holes 32 arranged at intervals can be provided on the connecting bracket 3 to reduce the weight of the connecting bracket 3 and improve the assembly efficiency between the connecting bracket 3 and the motor housing 30.

[0072] It should be noted that in some specific embodiments, the connecting bracket 3 is a plate-like structure. Of course, in other embodiments, the connecting bracket 3 can also be other shapes, and the specific shape of the connecting bracket 3 is not limited here.

[0073] Since this embodiment provides two specific implementations of the motor armature cooling structure 10, the following will describe these two forms in detail.

[0074] Please continue to combine Figure 3 and Figure 7 , Figure 7 for Figure 3 A schematic diagram of the connecting bracket in the structure shown. Figure 3 and Figure 7 As shown, in some embodiments, the motor armature cooling structure 10 may include four fuel injection pipes 1 arranged circumferentially along the armature 20. Specifically, the four fuel injection pipes 1 are, in sequence, a first fuel injection pipe 1a, a second fuel injection pipe 1b, a third fuel injection pipe 1c, and a fourth fuel injection pipe 1d along the circumference of the armature 20. Among them, the first fuel injection pipe 1a has the longest extension length, followed by the fourth fuel injection pipe 1d, the third fuel injection pipe 1c, and the second fuel injection pipe 1b. The first fuel injection pipe 1a and the fourth fuel injection pipe 1d are connected by a connecting oil pipe 2, and the third fuel injection pipe 1c and the second fuel injection pipe 1b are connected to opposite ends of the connecting oil pipe 2.

[0075] The connecting bracket 3 is provided with a first through hole 31a, a second through hole 31b and a third through hole 31c. The first through hole 31a is used for the first fuel injection pipe 1a to pass through, the second through hole 31b is used for the third fuel injection pipe 1c to pass through, and the third through hole 31c is used for the fourth fuel injection pipe 1d to pass through.

[0076] A first weight-reducing hole 32a is provided between the first through hole 31a and the second through hole 31b, and a second weight-reducing hole 32b is provided between the second through hole 31b and the third through hole 31c. Since the distance between the first fuel injection pipe 1a and the third fuel injection pipe 1c is relatively large, the extension length of the first weight-reducing hole 32a in the armature 20 circumference upward is greater than the extension length of the second weight-reducing hole 32b in the armature 20 circumference upward.

[0077] Please continue to combine Figure 8 , Figure 8 This is a schematic diagram of the structure of the motor provided in an embodiment of this application. As can be seen from the above, an oil inlet 12 needs to be formed on any of the fuel injection pipes 1. Since the oil inlet 12 needs to be located on the side away from the rear end cover 40 connected to the motor housing 30, in this embodiment, the oil inlet 12 is located on any one of the first fuel injection pipe 1a, the third fuel injection pipe 1c, and the fourth fuel injection pipe 1d.

[0078] Please combine Figure 4 and Figure 9 As shown, Figure 9 for Figure 4 A schematic diagram of the connecting bracket in the structure shown. Figure 4 and Figure 9As shown, in some other embodiments, the motor armature cooling structure 10 may include two fuel injection pipes 1 arranged circumferentially along the armature 20. Specifically, the two fuel injection pipes 1 are a fifth fuel injection pipe 1e and a sixth fuel injection pipe 1f, wherein the extension length of the fifth fuel injection pipe 1e is greater than the extension length of the sixth fuel injection pipe 1f, and the fifth fuel injection pipe 1e and the sixth fuel injection pipe 1f are connected by a connecting oil pipe 2.

[0079] The connecting bracket 3 has two fourth through holes 31d. One of the two fourth through holes 31d is used for the fifth fuel injection pipe 1e to pass through, and the other of the two fourth through holes 31d is used for the sixth fuel injection pipe 1f to pass through. There are two third weight reduction holes 32c between the two fourth through holes 31d.

[0080] Please combine Figure 6 and Figure 8 This embodiment also provides a motor 100, including a motor housing 30, an armature 20, and a motor armature cooling structure 10 as described in the above embodiments; an armature cavity 301 for accommodating the armature 20 is formed inside the motor housing 30, and the armature 20 is detachably connected to the motor housing 30; a plurality of motor armature cooling structures 10 are distributed around the armature 20 at intervals along the circumference of the armature 20, and the plurality of motor armature cooling structures 10 are located inside the armature cavity 301.

[0081] like Figure 6 As shown, in a specific embodiment of this invention, two motor armature cooling structures 10 can be distributed around the periphery of the armature 20. These two motor armature cooling structures 10 can be respectively disposed on the upper and lower sides, and their specific structures can refer to the two types of motor armature cooling structures 10 described in the above embodiments. That is, Figure 3 and Figure 4 The two types of motor armature cooling structures 10 shown in the figure are... Figure 3 The motor armature cooling structure 10 shown is located on the upper side. Figure 4 The motor armature cooling structure 10 shown is disposed on the lower side. Of course, in some other embodiments, the number and specific structure of the motor armature cooling structure 10 may be in other forms, which are not limited here.

[0082] Please continue to combine Figure 10 and Figure 11 , Figure 10 for Figure 8 Cross-sectional view along the AA direction. Figure 11 for Figure 10A magnified view of the partial structure at point B. A first oil inlet channel 302 is formed inside the motor housing 30, and a second oil inlet channel 401 is formed inside the rear end cover 40; each motor armature cooling structure 10 is provided with multiple oil injection pipes 1, and the two ends of one of the multiple oil injection pipes 1 in each motor armature cooling structure 10 are respectively formed as an oil inlet 12 and an oil outlet 13; the oil inlet 12 is connected to the first oil inlet channel 302, and the oil outlet 13 is connected to the second oil inlet channel 401.

[0083] Specifically, in the above embodiment, the fifth fuel injection pipe 1e can have an oil inlet 12 and an oil outlet 13 at its two ends. This eliminates the need for the oil passage connecting the first oil inlet 302 and the second oil inlet 401, reducing costs. The gear oil can then enter the rear end cover 40 through the fifth fuel injection pipe 1e to cool the rotor (not shown in the figure).

[0084] It should be noted that the oil inlet 12 is fitted with the first oil inlet channel 302 with a clearance fit, and the oil outlet 13 is fitted with the second oil inlet channel 401 with a clearance fit. This facilitates the installation of the motor armature cooling structure 10, thereby improving the assembly efficiency of the motor 100 provided in this embodiment.

[0085] Understandably, if the armature 20 can be positioned, not only can the installation efficiency of the armature 20 be improved, but also, during the use of the motor 100, even if the rotor collides with the armature 20, the position of the armature 20 will not change.

[0086] Please combine Figures 12 to 14 , Figure 12 This is a schematic diagram of the third partial structure of the motor provided in an embodiment of this application. Figure 13 for Figure 12 A sectional view along the CC direction. Figure 14 for Figure 13 A magnified schematic diagram of the partial structure at point D. As shown in the figure, in some embodiments, a limiting structure is provided on the cavity sidewall of the armature cavity 301; the limiting structure is used to limit the position of the armature 20 in the axial direction of the armature cavity 301, and to limit the position of the armature 20 in the radial direction of the armature cavity 301. In this way, not only can the coaxiality of the armature 20 and the armature cavity 301 be guaranteed, but the positional requirements between the armature 20 and the motor housing 30 after the armature 20 is assembled onto the motor housing 30 can also be met.

[0087] Please continue to combine Figure 15 and Figure 16 , Figure 15 This is a three-dimensional structural diagram of the motor housing in the motor provided in an embodiment of this application. Figure 16 for Figure 15A magnified schematic diagram of the partial structure at point E. In some specific embodiments, the limiting structure includes multiple limiting protrusions 50 arranged circumferentially along the armature cavity 301. Each limiting protrusion 50 includes a first limiting surface 501 and a second limiting surface 502 connected together. The first limiting surface 501 extends circumferentially along the core 201 and transitions into the outer circumferential surface of the core 201. The second limiting surface 502 stops at the end of the core 201. Thus, the positioning of the armature 20 can be achieved through the transitional engagement of the first limiting surface 501 with the outer circumference of the core 201 and the stopping engagement of the second limiting surface 502 with the end of the core 201.

[0088] It should be noted that, in some specific embodiments, the outer diameter of the iron core 201 can be greater than or equal to 219.95 mm and less than or equal to 220.03 mm; the diameter of the first limiting surface 501 can be greater than or equal to 220.00 mm and less than or equal to 220.046 mm. Here, no specific limitations are placed on the outer diameter of the iron core 201 and the diameter of the first limiting surface 501.

[0089] The motor housing 30 must be heated in the oven at a temperature greater than or equal to 110 degrees Celsius and less than or equal to 130 degrees Celsius for 1 hour before the cooled armature 20 can be placed into the motor housing 30.

[0090] Furthermore, in this embodiment, the size of the first limiting surface 501 along the axial direction of the armature 20 is one-quarter of the size of the armature 20. This satisfies both the need to fix the armature 20 and facilitates its assembly.

[0091] For example, the dimension of the first limiting surface 501 in the axial direction of the armature 20 can be 25.2 mm. Here, no specific limitation is made on the dimension value of the first limiting surface 501.

[0092] In this embodiment, four limiting protrusions 50 are arranged at intervals along the circumference of the armature cavity 301. In this way, the armature 20 can be positioned at multiple points along the circumference of the armature 20, thereby improving the positioning effect of the armature 20.

[0093] Please combine Figure 17 and Figure 18 , Figure 17 This is a schematic diagram of the fourth partial structure of the motor provided in an embodiment of this application. Figure 18 for Figure 17 A magnified schematic diagram of the partial structure at point F. The specific connection method between the armature 20 and the motor housing 30 could be that the iron core 201 of the armature 20 has lugs 204 on its periphery, and the lugs 204 are connected to the motor housing 30 by bolts 60.

[0094] The bolt 60 can be of M12-130 mm. No specific restrictions are placed on the choice of bolt 60. Specifically, the engagement length of the M12-130 bolt is 30 mm, which is 2.5 times the engagement length of the M12 bolt, making the armature 20 more securely fixed. Since the motor 100 provided in this embodiment is an oil-cooled motor, the bolt 60 does not use an anti-rust coating; instead, it uses SCM435 material. The gear oil forms an oil mist inside the motor 100, providing rust protection for the bolt 60.

[0095] In some specific embodiments, to improve the connection reliability between the armature 20 and the motor housing 30, the aforementioned lugs 204 can be configured as three, and the three lugs 204 are evenly distributed along the circumference of the iron core 201, that is, the included angle between two adjacent lugs 204 is 120 degrees. Of course, the lugs 204 need to be provided with threaded holes 2041 that mate with the bolt shank of the bolt 60. In this embodiment, the diameter of the threaded hole 2041 is greater than or equal to 12.2 mm and less than or equal to 12.4 mm, thus facilitating the assembly of the bolt 60.

[0096] Please combine Figure 19 , Figure 19 This is a three-dimensional structural diagram of the gasket in the motor provided in an embodiment of this application. It is understood that during the operation of the motor 100, the armature 20 may vibrate. To prevent the bolt 60 from loosening, in some embodiments, two stacked gaskets 70 are provided between the bolt head 601 of the bolt 60 and the lug 204. Each gasket 70 has multiple meshing teeth 701, and the opposite sides of the two gaskets 70 mesh together. Thus, through the meshing action between the two gaskets 70, the bolt 60 can be prevented from loosening.

[0097] Furthermore, in the axial direction of bolt 60, the maximum dimension of the meshing teeth 701 is greater than the pitch of bolt 60. This further prevents bolt 60 from loosening and improves the reliability of the connection between armature 20 and motor housing 30.

[0098] In some embodiments, the tightening torque of bolt 60 is greater than or equal to 125 Nm and less than or equal to 145 Nm. In this embodiment, the tightening torque of bolt 60 can be selected as 135 Nm. Here, no specific limitation is made on the tightening torque of bolt 60.

[0099] The motor 100 provided in this embodiment has high stability in use by adopting the above-described motor armature cooling structure 10.

[0100] This embodiment also provides a vehicle, including the motor 100 described in the above embodiments. It should be noted that the vehicle provided in this embodiment should also include other modules or components that enable the vehicle to operate normally; however, no specific limitations are imposed on other modules or components.

[0101] The vehicle provided in this embodiment has better performance by using the motor 100 described above.

[0102] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A motor armature cooling structure, characterized in that, Including fuel injection pipes; The fuel injection pipe has at least one row of fuel injection holes arranged circumferentially along the fuel injection pipe, and each row of fuel injection holes includes a plurality of first fuel injection holes arranged axially along the fuel injection pipe, the first fuel injection holes being disposed toward the armature. In any column of the injection hole group, at least one of the first injection holes is offset from any of the first injection holes in the injection hole group of the adjacent column along the axial direction of the injection pipe.

2. The motor armature cooling structure according to claim 1, characterized in that, The fuel injection pipes are configured as multiple, and two adjacent fuel injection pipes are connected by a connecting oil pipe. The connecting oil pipe is provided with multiple second oil injection holes facing the armature; In this embodiment, an oil inlet is formed on any one of the plurality of fuel injection pipes, and both ends of the remaining fuel injection pipes are closed ends.

3. The motor armature cooling structure according to claim 2, characterized in that, Along the axial direction of the armature, the axial dimension of the distribution area of ​​any row of the fuel injection orifice groups is greater than or equal to the axial dimension of the armature; and / or, The diameter of both the first and second fuel injection holes is 1.5 mm.

4. The motor armature cooling structure according to any one of claims 1 to 3, characterized in that, It also includes a connecting bracket having a through hole through which the fuel injection pipe passes; The connecting bracket is used for detachable connection with the motor housing.

5. An electric motor, characterized in that, Includes the motor housing, armature, and the motor armature cooling structure as described in any one of claims 1 to 4; An armature cavity is formed inside the motor housing to accommodate the armature, and the armature is detachably connected to the motor housing; The armature has multiple motor armature cooling structures arranged at intervals along its circumference, and these multiple motor armature cooling structures are located within the armature cavity.

6. The motor according to claim 5, characterized in that, It also includes a rear end cover connected to the motor housing, wherein a first oil inlet channel is formed inside the motor housing and a second oil inlet channel is formed inside the rear end cover; Each of the motor armature cooling structures is provided with a plurality of oil injection pipes, and the two ends of one of the plurality of oil injection pipes in each motor armature cooling structure are respectively formed as an oil inlet and an oil outlet. The oil inlet is connected to the first oil inlet channel, and the oil outlet is connected to the second oil inlet channel.

7. The motor according to claim 5, characterized in that, A limiting structure is provided on the cavity sidewall of the armature cavity; The limiting structure is used to limit the position of the armature in the axial direction of the armature cavity and to limit the position of the armature in the radial direction of the armature cavity.

8. The motor according to claim 7, characterized in that, The limiting structure includes a plurality of limiting protrusions arranged circumferentially along the armature cavity, and the limiting protrusions include a first limiting surface and a second limiting surface connected together. The armature includes an iron core, the first limiting surface extends circumferentially along the iron core and transitions into the outer peripheral surface of the iron core, and the second limiting surface stops at the end of the iron core. Along the axial direction of the armature, the size of the first limiting surface is one-quarter of the armature size.

9. The motor according to any one of claims 5 to 8, characterized in that, The armature has a lug, which is bolted to the motor housing. Two stacked washers are provided between the bolt head and the lug of the bolt. Each washer has multiple meshing teeth, and the opposite sides of the two washers mesh together. In the axial direction of the bolt, the maximum dimension of the meshing teeth is greater than the pitch of the bolt.

10. A vehicle, characterized in that, Includes the motor described in any one of claims 5 to 9.

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