Shell, motor, power assembly and vehicle
By opening grooves on the surface of the motor housing, the cooling of lubricating oil is achieved, the problem of large powertrain volume is solved, the use of additional oil coolers is reduced, and the cost is reduced.
Patent Information
- Application Number
- CN202420353826.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-26
- Publication Date
- 2025-03-11
- Estimated Expiration
- 2034-02-26
AI Technical Summary
In the prior art, electric vehicle powertrains require additional oil coolers to cool the lubricant, resulting in large volume of the powertrain.
A housing is designed, with a first groove and a second groove recessed toward the inside, the first groove is adapted to form a first flow channel, and the second groove is adapted to form a second flow channel. The first medium in the first flow channel can both cool the stator and cool the lubricating oil in the second flow channel, avoiding additional oil coolers.
With this design, the powertrain volume is reduced and the oil cooler is eliminated, reducing costs.
Smart Images
Figure CN222602170U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of vehicles, and in particular to a housing, a motor, a power assembly and a vehicle. Background Art
[0002] The motor provides driving force for the electric vehicle. An oil cooling channel and a water cooling channel are provided inside the motor. The lubricating oil in the oil cooling channel lubricates the motor. In the prior art, an additional oil cooler of a certain volume is required to cool the lubricating oil, resulting in a large volume of the powertrain. Utility Model Content
[0003] The utility model aims to provide a housing, a motor, a power assembly and a vehicle, which solve the problem of large volume of the power assembly.
[0004] In order to achieve the purpose of the utility model, the utility model provides the following technical solutions:
[0005] In a first aspect, the utility model provides a shell for a motor, wherein a first groove and a second groove recessed inward are provided on the surface of the shell, the first groove and the second groove are spaced apart, the first groove is suitable for constituting a first flow channel, the second groove is suitable for constituting a second flow channel, the first flow channel is suitable for a first medium to flow, and the second flow channel is suitable for a second medium to flow.
[0006] In one embodiment, the shell is cylindrical and has an inner circumferential surface and an outer circumferential surface spaced apart along the radial direction of the shell, the first groove is formed on the inner circumferential surface, and the second groove is formed on the outer circumferential surface.
[0007] In one embodiment, the first groove extends in a bent shape on the inner circumferential surface, and the second groove extends in a bent shape on the outer circumferential surface.
[0008] In one embodiment, the housing includes a first end surface and a second end surface opposite to each other in the axial direction, and the first groove and the second groove both extend from the first end surface to the second end surface.
[0009] In one embodiment, the first groove includes a plurality of first sections connected to each other in the axial direction of the housing, and the second groove includes a plurality of second sections connected to each other in the axial direction of the housing.
[0010] In one embodiment, the first groove further includes a first groove and a second groove, and the first groove and the second groove are arranged at two opposite ends of the inner circumferential surface in the axial direction, the first groove is opened on the first end surface, and the second groove is opened on the second end surface, and the first groove and the second groove both extend along the axial direction of the shell, and one of the first sections close to the first groove is smoothly connected to the first groove, and one of the first sections close to the second groove is smoothly connected to the second groove.
[0011] In one embodiment, the second groove also includes a third groove and a fourth groove, and the third groove and the fourth groove are arranged at two opposite ends of the outer peripheral surface in the axial direction, the third groove is opened on the first end surface, and the fourth groove is opened on the second end surface. The third groove and the fourth groove both extend along the axial direction of the shell, and one of the second sections close to the third groove is smoothly connected to the third groove, and one of the second sections close to the fourth groove is smoothly connected to the fourth groove.
[0012] In one implementation, an axial distance between at least two adjacent first sections along the shell is B1, and an axial distance between at least two adjacent first sections along the shell is B2, satisfying: B1≤B2.
[0013] In one implementation, an axial distance between at least two adjacent second sections along the shell is C1, and an axial distance between at least two adjacent second sections along the shell is C2, satisfying: C1≤C2.
[0014] In one embodiment, the two first sections whose axial distance along the shell is B1 are located between the two second sections whose axial distance along the shell is C2; the two second sections whose axial distance along the shell is C1 are located between the two first sections whose axial distance along the shell is B2.
[0015] In a second aspect, the utility model further provides a motor, comprising a casing, a stator and the shell as described in the first aspect, wherein the shell encloses a receiving cavity, the receiving cavity receives the stator, and the casing encloses a receiving cavity, the receiving cavity receives the shell.
[0016] In a third aspect, the utility model further provides a power assembly, comprising the motor as described in the second aspect.
[0017] In a fourth aspect, the utility model further provides a vehicle, comprising the power assembly as described in the third aspect.
[0018] A first groove and a second groove recessed inwardly are provided on the surface of the shell, and the first groove and the second groove are spaced apart from each other. The first groove is suitable for constituting a first flow channel, and the second groove is suitable for constituting a second flow channel. The first flow channel is suitable for a first medium to flow, and the second flow channel is suitable for a second medium to flow. The first medium in the first flow channel can cool the stator as well as the lubricating oil in the second flow channel. No additional oil cooler is required, thereby reducing the volume of the powertrain. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] In order to more clearly illustrate the implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0020] Figure 1 is a schematic structural diagram of a housing of an embodiment;
[0021] Figure 2 is a fluid domain structure diagram of a shell of an embodiment;
[0022] Figure 3 is a front view of a shell fluid domain structure of an embodiment;
[0023] Figure 4 is a top view of a housing of an embodiment;
[0024] Figure 5 is a front view of a housing of an embodiment;
[0025] Figure 6 yes Figure 5 Section view along AA.
[0026] Description of reference numerals:
[0027] 10-shell, 11-first groove, 111-first groove, 112-fluid domain of the second groove, 113-first section, 114-first connecting section, 115-second connecting section, 12-second groove, 121-third groove, 122-second section, 123-third connecting section, 124-fourth connecting section, 125-fourth groove, 13-inner circumferential surface, 14-outer circumferential surface, 15-first end surface, 16-second end surface, 17-accommodating chamber, 18-first flow channel, 19-second flow channel. DETAILED DESCRIPTION
[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0029] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there can be a central component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there can be a central component at the same time.
[0030] Unless otherwise defined, all technical and scientific terms used in this utility model have the same meaning as those commonly understood by technicians in the technical field of this utility model. The terms used in the specification of this utility model are only for the purpose of describing specific embodiments and are not intended to limit this utility model. The term "and / or" used in this utility model includes any and all combinations of one or more related listed items.
[0031] In conjunction with the accompanying drawings, some embodiments of the present invention are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.
[0032] The motor provides driving force for the electric vehicle. An oil cooling channel and a water cooling channel are provided inside the motor. The lubricating oil in the oil cooling channel lubricates the motor. In the prior art, an additional oil cooler of a certain volume is required to cool the lubricating oil, resulting in a large volume of the powertrain.
[0033] The present utility model embodiment provides a housing 10 for a motor, please refer to Figure 1 and Figure 2 , includes a shell 10, a first groove 11 and a second groove 12.
[0034] The surface of the housing 10 is provided with a first groove 11 and a second groove 12 which are recessed inwardly. The first groove 11 and the second groove 12 are arranged at intervals. The first groove 11 is suitable for forming a first flow channel 18, and the second groove 12 is suitable for forming a second flow channel 19. The first flow channel 18 is suitable for the flow of a first medium, and the second flow channel 19 is suitable for the flow of a second medium. Optionally, the first groove 11 is recessed inwardly from the surface of the housing 10 in a range of 0.5 mm to 30 mm. Optionally, the second groove 12 is recessed inwardly from the surface of the housing 10 in a range of 0.5 mm to 30 mm.
[0035] A first groove 11 and a second groove 12 recessed inwardly are provided on the surface of the housing 10, and the first groove 11 and the second groove 12 are spaced apart. The first groove 11 is suitable for constituting a first flow channel 18, and the second groove 12 is suitable for constituting a second flow channel 19. The first flow channel 18 is suitable for the flow of a first medium, and the second flow channel 19 is suitable for the flow of a second medium. The first medium in the first flow channel 18 can cool the stator as well as the lubricating oil in the second flow channel 19, and no additional oil cooler is required, thereby reducing the volume of the powertrain.
[0036] In one embodiment, please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 The shell 10 is cylindrical and has an inner circumferential surface 13 and an outer circumferential surface 14 which are spaced apart along the radial direction of the shell 10 . The first groove 11 is formed in the inner circumferential surface 13 , and the second groove 12 is formed in the outer circumferential surface 14 .
[0037] Optionally, the lubricating oil in the motor is introduced into the second groove 12 for circulation, and the coolant is introduced into the first groove 11 for circulation. The coolant in the first groove 11 cools the stator of the motor on the one hand, and cools the lubricating oil on the other hand, thereby eliminating the oil cooler and reducing the size of the motor.
[0038] Optionally, the inner circumferential surface 13 and the outer circumferential surface 14 are polished, and the polishing method may be fluid polishing, mechanical polishing, ultrasonic polishing, chemical polishing, electrolytic polishing, etc.
[0039] Specifically, the inner circumferential surface 13 and the outer circumferential surface 14 are polished to improve the smoothness of the inner circumferential surface 13 and the outer circumferential surface 14 and avoid scratching other parts of the motor.
[0040] Specifically, the double-channel circumferential structure of the utility model has a large heat transfer contact area, which can reduce flow channel resistance while ensuring the heat exchange efficiency of the motor.
[0041] In one embodiment, please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 The first groove 11 extends in a bent shape on the inner peripheral surface 13 , and the second groove 12 extends in a bent shape on the outer peripheral surface 14 .
[0042] Optionally, the housing 10 is formed by stamping, and the first groove 11 and the second groove 12 can be stamped, which reduces the thickness of the housing 10 while ensuring the structural strength of the first groove 11 and the second groove 12, and can effectively increase the heat exchange efficiency of the first groove 11 and the second groove 12. Optionally, the first groove 11 is a groove opened on the housing 10, and the second groove 12 is a groove opened on the housing 10.
[0043] Specifically, the above arrangement of the first groove 11 and the second groove 12 increases the heat exchange efficiency.
[0044] In one embodiment, please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 The housing 10 includes a first end surface 15 and a second end surface 16 which are opposite to each other in the axial direction, and the first groove 11 and the second groove 12 both extend from the first end surface 15 to the second end surface 16 .
[0045] Optionally, the first end face 15 and the second end face 16 are polished, and the polishing method can be fluid polishing, mechanical polishing, ultrasonic polishing, chemical polishing, electrolytic polishing, etc. Optionally, the first end face 15 and the second end face 16 are polished by fluid. Fluid polishing can reduce processing time and cost while ensuring polishing accuracy, and fluid polishing causes very little damage to the first end face 15 and the second end face 16. The advantages of fluid polishing are high efficiency, speed and low cost. Specifically, polishing the first end face 15 and the second end face 16 improves the smoothness of the first end face 15 and the second end face 16 and avoids scratching other motor components.
[0046] In one embodiment, please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 The first groove 11 includes a plurality of first sections 113 connected to each other in the axial direction of the housing 10 , and the second groove 12 includes a plurality of second sections 122 connected to each other in the axial direction of the housing 10 .
[0047] Optionally, the orthographic projection of the first section 113 on the shell 10 may be a polygon, a circle, an ellipse, an irregular shape, etc. Optionally, the orthographic projection of the first section 113 on the shell 10 may specifically be, but not limited to, a hexagon, an octagon, a circle, an ellipse, an irregular shape, etc. Optionally, the orthographic projection of the second section 122 on the shell 10 may be a polygon, a circle, an ellipse, an irregular shape, etc. Optionally, the orthographic projection of the second section 122 on the shell 10 may be a hexagon, an octagon, a circle, an ellipse, an irregular shape, etc. Specifically, the above-mentioned setting of the first section 113 improves the flexibility of the arrangement of the first groove 11 and the heat exchange effect. Specifically, the above-mentioned setting of the second section 122 improves the flexibility of the arrangement of the second groove 12 and the heat exchange effect.
[0048] Optional, please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 The first groove 11 also includes a first connecting segment 114 and a second connecting segment 115. The number of the first segments 113 is multiple and they are spaced apart in the axial direction of the shell 10. The first connecting segment 114 smoothly connects one end of the first segment 113 away from the first groove 111 and one end of the adjacent first segment 113. The second connecting segment 115 smoothly connects one end of the first segment 113 away from the first connecting segment 114 and one end of another adjacent first segment 113, so that the first groove 11 is serpentine.
[0049] Optionally, the orthographic projection of the first connecting section 114 in the radial direction of the housing 10 is a “U” shape. Optionally, the orthographic projection of the second connecting section 115 in the radial direction of the housing 10 is a “U” shape.
[0050] Specifically, the above arrangement of the first connecting section 114 and the second connecting section 115 improves the flexibility of the arrangement of the first groove 11 and the heat exchange effect.
[0051] Optional, please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 The second groove 12 also includes a third connecting segment 123 and a fourth connecting segment 124. The number of the second segments 122 is multiple and they are spaced apart in the axial direction of the shell 10. The third connecting segment 123 smoothly connects one end of the second segment 122 away from the third groove 121 and one end of the adjacent second segment 122. The fourth connecting segment 124 smoothly connects one end of the second segment 122 away from the third connecting segment 123 and one end of another adjacent second segment 122, so that the second groove 12 is serpentine.
[0052] Optionally, the orthographic projection of the third connecting segment 123 in the radial direction of the housing 10 is a “U” shape. Optionally, the orthographic projection of the fourth connecting segment 124 in the radial direction of the housing 10 is a “U” shape.
[0053] Specifically, the above arrangement of the third connecting segment 123 and the fourth connecting segment 124 improves the flexibility of the arrangement of the second groove 12 and the heat exchange effect.
[0054] In one embodiment, please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 The first groove 11 includes a first groove 111 and a second groove, and the first groove 111 and the second groove are arranged at two opposite ends of the inner circumferential surface 13 in the axial direction. The first groove 111 is opened on the first end surface 15, and the second groove is opened on the second end surface 16. The first groove 111 and the second groove both extend along the axial direction of the shell 10, and one of the first sections 113 close to the first groove 111 is smoothly connected to the first groove 111, and one of the first sections 113 close to the second groove is smoothly connected to the second groove.
[0055] Optionally, the second medium in the second groove forms a fluid domain 112 of the second groove when flowing.
[0056] Optionally, the orthographic projection of the first groove 111 in the axial direction of the housing 10 may be a polygon, a circle, an ellipse, an irregular shape, etc. Optionally, the orthographic projection of the first groove 111 in the axial direction of the housing 10 may be, but is not limited to, a quadrilateral, a hexagon, a circle, an ellipse, an irregular shape, etc.
[0057] Optionally, the orthographic projection of the second groove in the axial direction of the housing 10 may be a polygon, a circle, an ellipse, an irregular shape, etc. Optionally, the orthographic projection of the second groove in the axial direction of the housing 10 may be, but is not limited to, a quadrilateral, a hexagon, a circle, an ellipse, an irregular shape, etc.
[0058] Specifically, the above arrangement of the first groove 111 and the second groove improves the structure of the heat exchange channel.
[0059] In one embodiment, please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6The second groove 12 includes a third groove 121 and a fourth groove 125. The third groove 121 and the fourth groove 125 are arranged at two opposite ends of the outer peripheral surface 14 in the axial direction. The third groove 121 is opened on the first end surface 15, and the fourth groove 125 is opened on the second end surface 16. The third groove 121 and the fourth groove 125 both extend along the axial direction of the shell 10, and one of the second sections 122 close to the third groove 121 is smoothly connected to the third groove 121, and one of the second sections 122 close to the fourth groove 125 is smoothly connected to the fourth groove 125.
[0060] Optionally, the orthographic projection of the third groove 121 in the axial direction of the housing 10 may be a polygon, a circle, an ellipse, an irregular shape, etc. Optionally, the orthographic projection of the third groove 121 in the axial direction of the housing 10 may be, but is not limited to, a quadrilateral, a hexagon, a circle, an ellipse, an irregular shape, etc.
[0061] Optionally, the orthographic projection of the fourth slot 125 in the axial direction of the housing 10 may be a polygon, a circle, an ellipse, an irregular shape, etc. Optionally, the orthographic projection of the fourth slot 125 in the axial direction of the housing 10 may be, but is not limited to, a quadrilateral, a hexagon, a circle, an ellipse, an irregular shape, etc.
[0062] Specifically, the above arrangement of the third groove 121 and the fourth groove 125 improves the structure of the heat exchange channel.
[0063] In one embodiment, please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 The axial distance between at least two adjacent first sections 113 along the shell 10 is B1, and the axial distance between at least two adjacent first sections 113 along the shell 10 is B2, satisfying: B1≤B2.
[0064] Optionally, the axial distance between two adjacent first sections 113 along the housing 10 is B1, and the axial distance between two adjacent first sections 113 along the housing 10 is B2, satisfying: B1≤B2.
[0065] Specifically, the above configuration improves the flexibility of arranging the multiple first sections 113 .
[0066] In one embodiment, please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 The axial distance between at least two adjacent second sections 122 along the shell 10 is C1, and the axial distance between at least two adjacent second sections 122 along the shell 10 is C2, satisfying: C1≤C2.
[0067] Optionally, the axial distance between two adjacent second sections 122 along the housing 10 is C1, and the axial distance between two adjacent second sections 122 along the housing 10 is C2, satisfying: C1≤C2.
[0068] Specifically, the above configuration improves the flexibility of arranging the plurality of second sections 122 .
[0069] In one embodiment, please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 The two first sections 113 with an axial distance B1 along the shell 10 are located between the two second sections 122 with an axial distance C2 along the shell 10; the two second sections 122 with an axial distance C1 along the shell 10 are located between the two first sections 113 with an axial distance B2 along the shell 10.
[0070] Specifically, the above arrangement improves the positional relationship between the first section 113 and the second section 122 , so that the first section 113 and the second section 122 are arranged compactly.
[0071] The embodiment of the utility model further provides a motor, including a casing, a stator and the shell 10 as mentioned above, wherein the shell 10 encloses a receiving cavity 17 for receiving the stator, and the casing encloses a receiving cavity for receiving the casing 10 .
[0072] Optionally, the second groove 12 cooperates with the casing to form an oil cooling channel, and the housing 10 cooperates with the stator, and the above cooperation is an interference fit. The stator is the stator of the motor, forming a water coolant channel. The two channels are respectively located on both sides of the housing 10, which is more conducive to sealing, completely separating water and oil to avoid water and oil mixing. Optionally, the axial ends of the housing 10 are sealed by end glue filling or sealing pads to prevent leakage.
[0073] Optionally, the inlet and outlet of the first medium and the inlet and outlet of the second medium are arranged at both ends of the housing 10 in the axial direction, and the flow direction of the first medium in the first groove 11 is opposite to the flow direction of the second medium in the second groove 12. Optionally, when the first groove 111 is the first inlet and the second groove is the first outlet, the third groove 121 is the second outlet, and the fourth groove 125 is the second inlet. Optionally, when the first groove 111 is the first outlet and the second groove is the second inlet, the third groove 121 is the second inlet, and the fourth groove 125 is the second outlet. The above settings all form a countercurrent form between the first medium and the second medium, thereby increasing the heat exchange efficiency of the motor.
[0074] An embodiment of the utility model further provides a power assembly, comprising the motor as described above.
[0075] Specifically, when the first medium in the first groove 11 is water and the second medium in the second groove 12 is lubricating oil, the housing 10 can cool the lubricating oil, thereby reducing the use of an oil cooler and reducing the cost of the powertrain and the motor. On the other hand, the utility model can reduce the volume of the powertrain and the motor and improve integration.
[0076] An embodiment of the utility model further provides a vehicle, comprising the power assembly as described above.
[0077] In the description of the embodiments of the present invention, it should be noted that the orientation or positional relationship of terms such as "center", "up", "down", "left", "right", "vertical", "horizontal", "inside" and "outside" are based on the orientation or positional relationship of the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.
[0078] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Ordinary technicians in this field can understand that all or part of the processes of the above embodiment and equivalent changes made according to the present invention still fall within the scope covered by the present invention.
Claims
1. A housing for a motor, characterized in that: The surface of the shell is provided with a first groove and a second groove recessed inwardly, the first groove and the second groove are arranged at an interval, the first groove is suitable for forming a first flow channel, the second groove is suitable for forming a second flow channel, the first flow channel is suitable for the flow of a first medium, and the second flow channel is suitable for the flow of a second medium.
2. The housing according to claim 1, characterized in that The shell is cylindrical and has an inner circumferential surface and an outer circumferential surface spaced apart in a radial direction of the shell. The first groove is formed on the inner circumferential surface, and the second groove is formed on the outer circumferential surface.
3. The housing according to claim 2, characterized in that: The first groove extends in a bent shape on the inner circumferential surface, and the second groove extends in a bent shape on the outer circumferential surface.
4. The housing according to claim 3, characterized in that: The housing includes a first end surface and a second end surface that are opposite to each other in the axial direction, and the first groove and the second groove both extend from the first end surface to the second end surface.
5. The housing according to claim 4, characterized in that: The first groove includes a plurality of first sections connected to each other in the axial direction of the housing, and the second groove includes a plurality of second sections connected to each other in the axial direction of the housing.
6. The housing according to claim 5, characterized in that The first groove also includes a first groove and a second groove, and the first groove and the second groove are arranged at two opposite ends of the inner circumferential surface in the axial direction, the first groove is opened on the first end surface, and the second groove is opened on the second end surface, and the first groove and the second groove both extend along the axial direction of the shell, and one of the first sections close to the first groove is smoothly connected to the first groove, and one of the first sections close to the second groove is smoothly connected to the second groove.
7. The housing according to claim 5, characterized in that The second groove also includes a third groove and a fourth groove, and the third groove and the fourth groove are arranged at two opposite ends of the outer peripheral surface in the axial direction, the third groove is opened on the first end surface, and the fourth groove is opened on the second end surface. The third groove and the fourth groove both extend along the axial direction of the shell, and one of the second sections close to the third groove is smoothly connected to the third groove, and one of the second sections close to the fourth groove is smoothly connected to the fourth groove.
8. The housing according to claim 5, characterized in that An axial distance between at least two adjacent first sections along the shell is B1, and an axial distance between at least two adjacent first sections along the shell is B2, satisfying: B1≤B2.
9. The housing according to claim 8, characterized in that An axial distance between at least two adjacent second sections along the shell is C1, and an axial distance between at least two adjacent second sections along the shell is C2, satisfying: C1≤C2.
10. The housing according to claim 9, characterized in that The two first sections whose axial distance along the shell is B1 are located between the two second sections whose axial distance along the shell is C2; the two second sections whose axial distance along the shell is C1 are located between the two first sections whose axial distance along the shell is B2.
11. A motor, characterized in that: The invention comprises a casing, a stator and a shell as claimed in any one of claims 1 to 10, wherein the shell encloses a receiving cavity for receiving the stator, and the casing encloses a receiving cavity for receiving the shell.
12. A powertrain, characterized in that: Comprising the motor as claimed in claim 11.
13. A vehicle, characterized in that: Comprising the powertrain as claimed in claim 12.