Motor box body, motor assembly and vehicle

Abstract

The utility model relates to a motor box body, a motor assembly and a vehicle, the motor box body is provided with an inner wall capable of surrounding a stator core and a plurality of stator mounting structures protruding inwards from the inner wall, and the plurality of stator mounting structures are arranged at intervals along the circumferential direction, so that a clearance area is formed between two adjacent stator mounting structures. And the stator mounting structure is provided with a flow guide channel capable of communicating two adjacent clearance areas. According to the design, the stator iron core is installed on the stator installation structure, when cooling oil is sprayed to the upper side of the stator iron core, due to the fact that the stator installation structure is provided with the flow guide channel, the cooling oil can flow from one receding area to the other receding area through the flow guide channel, and therefore the cooling oil can be sprayed to the upper side of the stator iron core. The cooling oil located on the upper side of the stator iron core can sequentially flow through the receding areas and the flow guide channels downwards in the circumferential direction to the lower side of the stator iron core under the action of gravity, so that all positions of the circumferential surface of the stator iron core are cooled uniformly, the power density of the motor is further improved, and the capacity of the motor is fully exerted.

Description

Technical Field

[0001] The present disclosure relates to the technical field of motor cooling, and in particular, to a motor housing, a motor assembly and a vehicle. Background Art

[0002] The motor usually includes a housing, a stator and a rotor. The rotor is installed in the center of the housing through a rotating shaft, and the stator is fixed to the inner wall of the housing. The motor generates a lot of heat when working, so it is necessary to dissipate heat by spraying cooling oil on the stator. However, since the outer circumference of the stator is fitted with the inner wall of the housing, when cooling the stator, only the axial end of the stator can be sprayed with cooling oil, and the cooling oil cannot be sprayed on the side circumference of the stator, resulting in poor cooling effect. Utility Model Content

[0003] The purpose of the present disclosure is to provide a motor housing, a motor assembly and a vehicle to at least partially solve the problems existing in the related art.

[0004] In order to achieve the above-mentioned purpose, the present disclosure provides a motor case, which has an inner wall that can surround the stator core and a plurality of stator mounting structures protruding inward from the inner wall, the plurality of stator mounting structures are arranged at intervals along the circumferential direction so that an air avoidance area is formed between two adjacent stator mounting structures, and the stator mounting structure is provided with a guide channel that can connect the two adjacent air avoidance areas.

[0005] Optionally, the stator mounting structure has a mounting surface for contacting and cooperating with the stator core profile.

[0006] Optionally, the guide channel is a guide groove opened on the mounting surface.

[0007] Optionally, each of the mounting surfaces is provided with a plurality of the guide grooves, and the plurality of the guide grooves are arranged in sequence and spaced apart along the axial direction.

[0008] Optionally, an axial length L1 of a portion of the mounting surface in contact with the stator core profile and an axial length L2 of the stator core satisfy: L1:L2≥0.7.

[0009] Optionally, the axial lengths of the portions of the plurality of mounting surfaces in contact with the stator core profile are the same.

[0010] Optionally, the number of the mounting surfaces is greater than or equal to 6.

[0011] Optionally, the number of the mounting surfaces is an even number, wherein, in the axial projection, in any pair of corresponding mounting surfaces, the angle W1 between a line connecting the center of one to the center of the stator core and a line connecting the center of the other to the center of the stator core is an obtuse angle and satisfies: W1 ≥ 170°.

[0012] Optionally, W1 = 180°.

[0013] Optionally, in the projection along the axial direction, in any pair of corresponding two mounting surfaces, the circumferential angle W2 of one and the circumferential angle W3 of the other satisfy: (W2-W3) / W2≤50%, wherein W2≥W3.

[0014] Optionally, the sum W of the circumferential angles of the plurality of mounting surfaces satisfies: W ≥ 90°.

[0015] According to a second aspect of the present disclosure, a motor assembly is provided, including a power component having a stator core and a rotor, and the above-mentioned motor housing.

[0016] Optionally, the motor assembly includes two power components, and the two power components are respectively arranged on both sides of the motor housing.

[0017] According to a third aspect of the present disclosure, a vehicle is provided, comprising the above-mentioned motor assembly.

[0018] Through the above technical solution, the stator core is installed on the stator mounting structure of the inner wall of the motor case. When cooling oil is sprayed on the upper side of the stator core, since the stator mounting structure is provided with a guide channel, the cooling oil can flow from one air avoidance area to another air avoidance area located on the lower side through the guide channel. Therefore, the cooling oil sprayed on the upper side of the stator core will flow downward in the circumferential direction through each air avoidance area and the guide channel in turn under the action of gravity until the lower side of the stator core, so that all positions on the circumferential surface of the stator core are sprayed with cooling oil, the stator core is cooled evenly, the power density of the motor is improved, and the capacity of the motor is fully exerted.

[0019] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0021] Figure 1 is a first angle schematic diagram of a motor housing exemplarily shown according to the present disclosure;

[0022] Figure 2 yes Figure 1 A second angle schematic diagram of the motor housing shown in FIG.

[0023] Figure 3 yes Figure 1 The motor housing shown in FIG. 1 is used for a motor and a flow path of a coolant;

[0024] Figure 4 yes Figure 1 An axial side view of the motor housing shown in FIG.

[0025] Figure 5 yes Figure 1 A top cross-sectional view of the motor housing shown in FIG.

[0026] Figure 6 1 is a top cross-sectional view of a motor assembly exemplarily shown according to the present disclosure.

[0027] Description of Reference Numerals

[0028] 100 - motor housing; 110 - inner wall; 200 - stator mounting structure; 210 - mounting surface; 300 - flow guide channel; 310 - flow guide groove; 400 - stator core; 500 - rotor; 600 - air avoidance area. DETAILED DESCRIPTION

[0029] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0030] In the present disclosure, unless otherwise specified, directional words such as "inside" and "outside" may be based on the structure of the relevant components themselves, or may be based on the orientation of the relevant components when used in combination. For example: a motor casing having an "inner wall" that can surround the stator core and a plurality of stator mounting structures protruding "inward" from the inner wall means that the stator mounting structures are arranged on the inner wall surface of the motor casing and protrude from the inner wall surface in a direction toward the stator core.

[0031] In the present disclosure, the terms "first", "second", etc. are used to distinguish one element from another element, and do not have order and importance. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0032] Reference Figure 1-Figure 6The present disclosure exemplarily shows a motor case, wherein the motor case 100 has an inner wall 110 capable of surrounding a stator core 400 and a plurality of stator mounting structures 200 protruding inward from the inner wall 110, wherein the plurality of stator mounting structures 200 are arranged at intervals along the circumferential direction so that an air avoidance region 600 is formed between two adjacent stator mounting structures 200, and the stator mounting structure 200 is provided with a flow guide channel 300 capable of connecting two adjacent air avoidance regions 600. Here, the bottom surface of the air avoidance region 600 may be the inner wall 110 of the motor case 100, or may be other structures arranged on the inner wall 110, as long as an air avoidance region 600 capable of accommodating cooling oil is formed between two adjacent stator mounting structures 200.

[0033] The present disclosure does not limit the specific structure and formation method of the stator mounting structure 200. For example, in the embodiments of the present disclosure, the stator mounting structure 200 can be constructed as an arc-shaped plate that matches the inner wall 110 of the motor case 100 and the outer peripheral shape of the stator core 400, one side of the plate surface is used to fit and connect with the inner wall of the motor case 100, and the other side of the plate surface is used to connect with the outer periphery of the stator core 400. It can be integrally formed with the motor case 100, or it can also be fixed to the inner wall 110 of the motor case 100 by welding or the like. In addition, in some other embodiments, the stator mounting structure 200 can also be constructed as an irregular shape, as long as it can be used to install the stator core 400.

[0034] The present disclosure does not limit the flow guide channel 300. Figure 1 and Figure 2 In the illustrated embodiment, the flow guiding channel 300 may be a flow guiding groove 310 open toward the stator core 400. In addition, in some other embodiments, the flow guiding channel 300 may also be an oil passage channel with only two ends in the length direction being open.

[0035] By using the above technical solution, the stator core 400 is mounted on the stator mounting structure 200 of the inner wall 110 of the motor housing 100. When the cooling oil is sprayed on the upper side of the stator core 400, since the stator mounting structure 200 is provided with a guide channel 300, the cooling oil can flow from one avoidance area 600 to another avoidance area 600 located at the lower side through the guide channel 300. Therefore, referring to Figure 3 The cooling oil sprayed on the upper side of the stator core 400 will flow downward in the circumferential direction through each of the air avoidance areas 600 and the guide channel 300 in sequence under the action of gravity until it reaches the lower side of the stator core 400, so that all positions on the circumference of the stator core 400 are sprayed with cooling oil, the stator core 400 is cooled evenly, the power density of the motor is improved, and the capacity of the motor is fully exerted.

[0036] In order to ensure the stable installation between the stator core 400 and the stator mounting structure 200, refer to Figure 1 and Figure 2 In the embodiment of the present disclosure, the stator mounting structure 200 may have a mounting surface 210 for contacting and matching with the stator core 400. With such a design, during installation, the outer peripheral surface of the stator core 400 is fitted and fixed to the mounting surface 210, thereby ensuring the stability of the installation of the stator core 400 and avoiding vibration and noise during the operation of the motor. The present disclosure does not limit the connection method between the stator core 400 and the motor housing, for example, it can be an interference fit as mentioned below, or it can be fixed by bolts and nuts, which will be described in detail below.

[0037] Reference Figure 1 and Figure 2 In the embodiment of the present disclosure, the guide channel 300 may be a guide groove 310 opened at the mounting surface 210. The opening of the guide groove 310 faces the stator core 400. When cooling oil is sprayed on the upper side of the stator core 400, the cooling oil can flow from one clearing area 600 to another clearing area 600 through the guide groove 310. Compared with the method of opening a through hole on the stator fixing structure 200 for oil flow, with such a design, the position of the stator core 400 corresponding to the guide groove 310 can also always be in contact with the cooling oil, thereby improving the cooling effect of this position.

[0038] In the embodiment of the present disclosure, the guide groove 310 may be integrally formed with the motor housing 100 , or may be opened later, and the present disclosure does not limit this.

[0039] In order to improve the flow efficiency of the cooling oil along the circumferential direction of the stator core 400, refer to Figure 1 and Figure 2 In the embodiment of the present disclosure, each mounting surface 210 may be provided with a plurality of guide grooves 310, and the plurality of guide grooves 310 may be arranged in sequence and spaced apart along the axial direction. With such a design, on the one hand, the oil passing area between two adjacent air-avoiding areas 600 may be increased, and on the other hand, the cooling area of ​​the stator core 400 directly in contact with the cooling oil may be increased.

[0040] In the embodiment of the present disclosure, the number of the guide grooves 310 on each mounting surface 210 may be 2, 3, etc.

[0041] Reference Figure 5 and Figure 6In the embodiment of the present disclosure, the axial length L1 of the portion of the mounting surface 210 in contact with the stator core 400 and the axial length L2 of the stator core 400 may satisfy: L1:L2≥0.7, specifically L1:L2=0.7, L1:L2=0.8, L1:L2=0.9, etc. With such a design, on the one hand, it can ensure that the stator core 400 is wrapped by the mounting surface 210 to a greater extent in the axial direction, thereby ensuring the stability of the installation of the stator core 400; on the other hand, since the motor rotor 500 is mounted on the inner ring of the stator core 400 through a bearing, and the bearing is mounted on the bearing mounting hole of the motor housing 100, the coaxiality of the stator core 400 and the bearing mounting hole can be ensured by making the stator core 400 be wrapped by the mounting surface 210 to a greater extent, that is, the coaxiality of the inner ring of the stator core 400 and the rotor 500 can be ensured, thereby avoiding the rotor 500 from sweeping the stator core 400 when rotating.

[0042] Here, it needs to be explained that "the portion of the mounting surface 210 that contacts the stator core 400 profile" refers to the portion of the mounting surface 210 that directly contacts the stator core 400. For example, when the guide channel 300 is a guide groove 310 opened at the mounting surface 210, the axial length L1 of the portion of the mounting surface 210 that contacts the stator core 400 profile does not include the length corresponding to the guide groove 310 portion.

[0043] In the embodiment of the present disclosure, the axial lengths of the portions of the multiple mounting surfaces 210 that are in contact with the profile of the stator core 400 may be the same. With such a design, the difficulty of designing the axial lengths of the mounting surfaces 210 and the stator core 400 can be reduced, and the equal lengths of the multiple mounting surfaces 210 can further ensure the stability of the stator core 400 installation and the coaxiality of the inner ring of the stator core 400 and the rotor 500 during operation, thereby preventing the local position of the stator core 400 from being easily deformed or loosened due to the inconsistent axial lengths of the various mounting surfaces 210.

[0044] In order to ensure the installation stability of the stator core 400 and the coaxiality of the inner ring of the stator core 400 and the rotor 500 during operation, refer to Figure 1-Figure 2 In the embodiment of the present disclosure, the number of the mounting surfaces 210 may be greater than or equal to 6, specifically 6, 8, etc.

[0045] Similarly, in order to ensure the installation stability of the stator core 400 and the coaxiality of the inner ring of the stator core 400 and the rotor 500 during operation, in some other embodiments, the sum W of the circumferential angles of the multiple mounting surfaces 210 can satisfy: W ≥ 90°, for example, W = 90°, W = 100°, etc.

[0046] It should be noted that the number of the above-mentioned mounting surfaces 210 being greater than or equal to 6 and W ≥ 90° are not contradictory. For example, in some embodiments, the mounting surface 210 can satisfy both conditions at the same time.

[0047] Reference Figure 4 In the embodiment of the present disclosure, the number of mounting surfaces 210 may be an even number, wherein, in the axial projection, in any pair of corresponding mounting surfaces 210, the angle W1 between the line from the center of one to the center of the stator core 400 and the line from the center of the other to the center of the stator core 400 is an obtuse angle and may satisfy: W1 ≥ 170°. It should be explained that the "two corresponding mounting surfaces 210" here refers to a group of mounting surfaces 210 that are close to being directly opposite in the circumferential direction, that is, the two are close to being centrally symmetrical. Of course, the centrally symmetrical here refers to the positional symmetry of the center lines of the two, and does not require that the circumferential angles located on the mounting surfaces 210 are the same and symmetrical. Such a design can ensure that a corresponding group of mounting surfaces 210 can limit the stator core 400 from both sides, thereby ensuring the installation stability of the stator core 400, and the coaxiality of the inner ring of the stator core 400 and the rotor 500 during operation.

[0048] The present disclosure does not limit the specific angle of W1. For example, in some preferred embodiments, W1=180°.

[0049] In order to ensure that the mounting surfaces 210 located on both sides of the stator core 400 are evenly wrapped around both sides of the stator core 400, so as to further ensure the installation stability of the stator core 400 and the coaxiality of the inner ring of the stator core 400 and the rotor 500 during operation, in the embodiment of the present disclosure, in the axial projection, in any pair of corresponding mounting surfaces 210, the circumferential angle W2 of one and the circumferential angle W3 of the other can satisfy: (W2-W3) / W2≤50%, where W2≥W3. Figure 4 , three groups of relative mounting surfaces 210 are shown in the figure, and only one group W2 and W3 are marked here for example. Such a design can ensure that the difference between the circumferential angles of the two mounting surfaces 210 located on the opposite sides of the stator core 400 is within a reasonable range, and avoid that the sum of the circumferential angles of the mounting surfaces 210 located on the two sides of the stator core 400 is too large, thereby causing the mounting surface 210 on the side with a smaller circumferential angle to be unable to provide the required support force to the stator core 400, so that the installation stability of the stator core 400 or the coaxiality of the stator core 400 and the rotor 500 are affected.

[0050] According to a second aspect of the present disclosure, a motor assembly is provided, including a power component having a stator core 400 and a rotor 500, and the above-mentioned motor case. Since the motor assembly has all the beneficial effects of the above-mentioned motor case, they are not described in detail here.

[0051] The present disclosure does not limit the type of motor assembly. Figure 5 In the illustrated embodiment, the motor assembly may include two power assemblies, which may be disposed on both sides of the motor housing. In this case, the motor housing 100 needs to be provided with a set of stator mounting structures 200 on both sides, and each set of stator mounting structures 200 corresponds to a stator core 400 of a power assembly. In addition, in some other embodiments, the electric assembly may include only one power assembly.

[0052] According to a third aspect of the present disclosure, a vehicle is provided, comprising the above-mentioned motor assembly. Since the vehicle has all the beneficial effects of the above-mentioned motor assembly, they are not described in detail here.

[0053] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0054] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0055] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A motor housing, characterized in that: The motor case has an inner wall capable of surrounding a stator core and a plurality of stator mounting structures protruding inward from the inner wall. The plurality of stator mounting structures are arranged at intervals along the circumferential direction so that an air avoidance area is formed between two adjacent stator mounting structures. The stator mounting structure is provided with a guide channel capable of connecting two adjacent air avoidance areas.

2. The motor housing according to claim 1, characterized in that: The stator mounting structure has a mounting surface for matching with the stator core in a form contact manner.

3. The motor housing according to claim 2, characterized in that: The guide channel is a guide groove opened on the installation surface.

4. The motor housing according to claim 3, characterized in that: Each of the mounting surfaces is provided with a plurality of the guide grooves, and the plurality of the guide grooves are sequentially spaced apart along the axial direction.

5. The motor housing according to claim 2, characterized in that: An axial length L1 of a portion of the mounting surface in contact with the stator core profile and an axial length L2 of the stator core satisfy: L1:L2≥0.

7.

6. The motor housing according to claim 5, characterized in that: The axial lengths of the portions of the plurality of mounting surfaces that are in contact with the stator core profile are the same.

7. The motor housing according to claim 2, characterized in that: The number of the mounting surfaces is greater than or equal to 6.

8. The motor housing according to claim 7, characterized in that: The number of the mounting surfaces is an even number, Among them, in the axial projection, in any pair of corresponding two mounting surfaces, the angle W1 between the line connecting the center of one to the center of the stator core and the line connecting the center of the other to the center of the stator core is an obtuse angle and satisfies: W1≥170°.

9. The motor housing according to claim 8, characterized in that: W1=180°。 10. The motor housing according to claim 8, characterized in that: In the projection along the axial direction, in any pair of corresponding mounting surfaces, the circumferential angle W2 of one and the circumferential angle W3 of the other satisfy: / W2≤50%, where W2≥W3.

11. The motor housing according to claim 2, characterized in that: The sum W of the circumferential angles of the plurality of mounting surfaces satisfies: W ≥ 90°.

12. A motor assembly, characterized in that: It comprises a power assembly having a stator core and a rotor, and a motor housing according to any one of claims 1-11.

13. The motor assembly according to claim 12, characterized in that: The motor assembly includes two power components, and the two power components are respectively arranged on both sides of the motor housing.

14. A vehicle, characterized in that: Includes the motor assembly as described in claim 12 or 13.

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