Motor assembly and vehicle
By setting a cut-shaped channel between the motor plug and the motor shaft body, the problem of lubricating oil being unable to enter the motor bearing is solved, the motor bearing is fully lubricated, the damage risk is reduced, and the performance of the motor bearing is improved.
Patent Information
- Application Number
- CN202422064697.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-23
- Publication Date
- 2025-09-19
- Estimated Expiration
- 2034-08-23
AI Technical Summary
In existing vehicle motor assemblies, the lubricating oil is blocked by the end face of the motor plug due to centrifugal force and cannot enter the motor bearings, resulting in insufficient lubricating oil and foreign matter remaining for too long, which in turn damages the motor bearings.
A motor assembly is designed. A cut-out channel is set between the connection part of the motor plug and the inner wall of the motor shaft body, so that lubricating oil enters the motor bearing through the cut-out channel and the motor oil hole, forming a lubrication channel to ensure sufficient supply of lubricating oil.
Improves the lubrication of motor bearings, reduces the risk of foreign matter intrusion and seizure, improves motor bearing performance and reduces wear.
Smart Images
Figure CN223363944U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of vehicle technology, and in particular to a motor assembly and a vehicle. Background Art
[0002] The motor assemblies of some existing vehicles use oil-swinging to cool and lubricate their motor bearings. At medium- and high-speed rotation, the lubricating oil is primarily blocked by the end face of the motor plug due to centrifugal force, preventing it from entering the motor bearings and their surrounding areas through the oil holes in the motor shaft. This results in insufficient lubricating oil in the motor bearings, causing foreign matter to remain in the bearings for an extended period of time, leading to bearing damage. Utility Model Content
[0003] The present application provides a motor assembly and a vehicle to solve the technical problem that most of the lubricating oil in the vehicle motor assembly is first blocked by the end face of the motor plug and cannot enter the motor bearing and its vicinity through the oil hole of the motor shaft, resulting in insufficient lubricating oil at the motor bearing, causing foreign matter to remain in the motor bearing for too long, and further causing damage to the motor bearing.
[0004] In order to solve the above technical problems, the present application proposes a motor assembly, comprising: a motor shaft, comprising a motor shaft body and a first end and a second end arranged at both ends of the motor shaft body, the motor shaft body forming a motor channel extending along a first direction, the first end being used to communicate with the spline, and the second end being provided with a motor oil hole; a motor plug, comprising a connecting portion, the connecting portion being arranged in the second end, a cut-shaped channel being formed between the outer peripheral surface of the connecting portion and the inner side wall of the motor shaft body, and the cut-shaped channels are all connected with the motor channel and the motor oil hole; a motor bearing, sleeved on the outer periphery of the second end; wherein the spline, the motor channel, the cut-shaped channel and the motor oil hole form a lubrication channel for lubricating the motor bearing.
[0005] A cut-shaped portion extending along the first direction is provided on the outer periphery of the connecting portion, and a cut-shaped channel is formed between the cut-shaped portion and the inner side wall of the motor shaft body.
[0006] The cutting portion is a cutting surface, and the cutting surface is extended along the first direction.
[0007] The center line of the motor oil hole and the center line of the cutting surface are located in the same plane.
[0008] The angle between the center line of the motor oil hole and the center line of the cutting surface is greater than or equal to 85 degrees and less than or equal to 95 degrees.
[0009] The ratio of the vertical distance between the center line of the motor plug and the center line of the cutting surface to the radius of the motor plug is greater than or equal to 0.1 and less than or equal to 0.7.
[0010] The motor plug includes a fixing portion and a connecting portion connected to the fixing portion, the connecting portion is crimped inside the second end portion, and the fixing portion is located outside the second end portion; the cutting surface extends from the connecting portion to the connection position between the connecting portion and the fixing portion.
[0011] Wherein, a sealing layer is provided at one end of the connecting portion away from the fixing portion; and / or a hollow portion is provided inside the connecting portion.
[0012] A marking groove is provided on the outer peripheral surface of the motor shaft, and the center line of the marking groove, the center line of the motor oil hole and the center line of the cutting surface are on the same plane.
[0013] In order to solve the above technical problems, the present application proposes a vehicle comprising the above-mentioned motor assembly.
[0014] The beneficial effects of the present application are as follows: Different from the prior art, the present application provides a motor assembly. The motor assembly includes a motor shaft, a motor plug and a motor bearing. The motor shaft includes a motor shaft body and a first end and a second end arranged at both ends of the motor shaft body. The motor shaft body is formed with a motor channel extending along a first direction. The first end is used to communicate with the spline. The second end is provided with a motor oil hole. The motor plug includes a connecting portion. The connecting portion is arranged in the second end. A cut-shaped channel is formed between the outer peripheral surface of the connecting portion and the inner side wall of the motor shaft body. The cut-shaped channels are all connected to the motor channel and the motor oil hole. The motor bearing is sleeved on the outer periphery of the second end. The spline, the motor channel, the cut-shaped channel and the motor oil hole form a lubrication channel for lubricating the motor bearing.
[0015] Therefore, by arranging the above-mentioned cut-shaped channel between the outer peripheral surface of the connecting part of the motor plug and the inner side wall of the motor shaft body, under medium and high-speed rotation, most of the lubricating oil enters the motor oil hole through the cut-shaped channel, increasing the amount of lubricating oil at the motor bearing, improving the lubrication condition of the motor bearing, thereby reducing the risks of foreign matter intrusion, motor bearing jamming and motor bearing order problems caused by insufficient lubricating oil in the motor bearing, thereby improving the performance of the motor bearing and reducing wear. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present application. Those skilled in the art can also derive other drawings based on these drawings without inventive work, among which:
[0017] Figure 1 is a first partial cross-sectional schematic diagram of an embodiment of a motor assembly of the present application;
[0018] Figure 2 yes Figure 1A schematic structural diagram shown;
[0019] Figure 3 is a second partial cross-sectional schematic diagram of an embodiment of a motor assembly of the present application;
[0020] Figure 4 is a third partial cross-sectional schematic diagram of an embodiment of a motor assembly of the present application;
[0021] Figure 5 yes Figure 4 The schematic structural diagram of C shown;
[0022] Figure 6 yes Figure 3 The structural diagram of B shown;
[0023] Figure 7 It is a cross-sectional schematic diagram of a motor plug in one embodiment of a motor assembly of the present application.
[0024] Figure numbers: 10, motor assembly; 11, motor shaft; 111, motor shaft body; 1111, motor channel; 112, first end; 113, second end; 114, motor oil hole; 115, marking groove; 12, motor plug; 121, connecting portion; 1211, cutting portion; 12111, cutting surface; 1212, sealing layer; 1213, hollow portion; 122, fixing portion; 13, cutting channel; 14, motor bearing; 15, rotor assembly. DETAILED DESCRIPTION
[0025] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.
[0026] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.
[0027] The motor assembly and vehicle provided by the present invention are described in detail below with reference to the embodiments.
[0028] See also Figure 1 、 Figure 2 as well as Figure 3 , Figure 1is a first partial cross-sectional schematic diagram of an embodiment of a motor assembly of the present application; Figure 2 yes Figure 1 A schematic structural diagram shown; Figure 3 It is a second partial cross-sectional schematic diagram of an embodiment of a motor assembly of the present application. The present application provides a motor assembly 10. The motor assembly 10 includes a motor shaft 11, a motor plug 12 and a motor bearing 14. The motor shaft 11 includes a motor shaft body 111, a first end 112 and a second end 113. The first end 112 and the second end 113 are arranged opposite to each other. The first end 112 is arranged at one end of the motor shaft body 111, and the second end 113 is arranged at the other end of the motor shaft body 111. The motor shaft body 111 is formed with a motor channel 1111. The motor channel 1111 provides a movement channel for lubricating oil. The motor channel 1111 is extended along a first direction. The first end 112 is used to communicate with a spline (not shown in the figure), that is, the lubricating oil enters the first end 112 of the motor shaft body 111 from the spline. The above-mentioned first direction can be, but is not limited to, the axial direction of the motor shaft 11.
[0029] The second end portion 113 is provided with a motor oil hole 114. The motor oil hole 114 is connected to the motor channel 1111. The motor plug 12 includes a connecting portion 121. The connecting portion 121 is arranged in the second end portion 113, such as the connecting portion 121 is interference-fitted in the second end portion 113; or, the connecting portion 121 is crimped in the second end portion 113. A cut-shaped channel 13 is formed between the outer peripheral surface of the connecting portion 121 and the inner side wall of the motor shaft body 111. The cut-shaped channel 13 is connected to the motor channel 1111 and the motor oil hole 114, that is, the lubricating oil can flow in the motor channel 1111, the cut-shaped channel 13 and the motor oil hole 114. The motor bearing 14 is sleeved on the outer periphery of the second end portion 113.
[0030] The splines, motor channel 1111, cut-out channel 13, and motor oil hole 114 form a lubrication channel (not shown) for lubricating motor bearing 14. During medium- to high-speed rotation, some lubricating oil enters motor bearing 14 and its vicinity via the splines, motor channel 1111, cut-out channel 13, and motor oil hole 114, thereby improving lubrication of motor bearing 14 and its vicinity.
[0031] Therefore, by arranging the above-mentioned cut-shaped channel 13 between the outer peripheral surface of the connecting part 121 of the motor plug 12 and the inner wall of the motor shaft body 111, under medium and high-speed rotation, most of the lubricating oil enters the motor oil hole 114 through the cut-shaped channel 13, thereby increasing the amount of lubricating oil at the motor bearing 14 and improving the lubrication condition of the motor bearing 14, thereby reducing the risks of foreign matter intrusion into the motor bearing 14, jamming of the motor bearing 14 and order problems of the motor bearing 14 due to insufficient lubricating oil, thereby improving the performance of the motor bearing 14 and reducing wear.
[0032] See also Figure 4 and Figure 5 , Figure 4 is a third partial cross-sectional schematic diagram of an embodiment of a motor assembly of the present application; Figure 5 yes Figure 4 Schematic diagram of the structure of C. Figures 1 to 3 , the above-mentioned cut-shaped channel 13 is formed by the outer circumferential surface of the connecting portion 121 and the inner side wall of the motor shaft body 111. For example, a cut-shaped portion 1211 is provided on the outer circumferential surface of the connecting portion 121, wherein the above-mentioned cut-shaped channel 13 is formed between the cut-shaped portion 1211 and the inner side wall of the motor shaft body 111. Alternatively, a cut-shaped portion 1211 is provided on the inner side wall of the motor shaft body 111, wherein the above-mentioned cut-shaped channel 13 is formed between the cut-shaped portion 1211 and the outer circumferential surface of the connecting portion 121. Alternatively, one cut-shaped portion 1211 is provided on the outer circumferential surface of the connecting portion 121, and another cut-shaped portion 1211 is provided on the inner side wall of the motor shaft body 111, wherein the above-mentioned cut-shaped channel 13 is formed between the two cut-shaped portions 1211. Thus, the cut-shaped portion 1211 can be provided on the outer circumferential surface of the connecting portion 121 and / or the inner side wall of the motor shaft body 111, and its setting position can be determined according to actual needs and is not limited here.
[0033] For example, in a specific embodiment, a cut-out portion 1211 extending along a first direction is provided on the outer periphery of the connecting portion 121. That is, the cut-out portion 1211 is provided on the outer peripheral surface of the connecting portion 121. The cut-out channel 13 is formed between the cut-out portion 1211 and the inner side wall of the motor shaft body 111. Compared with providing the cut-out portion 1211 on the inner side wall of the motor shaft body 111, or providing the cut-out portion 1211 on both the inner side wall of the motor shaft body 111 and the outer peripheral surface of the connecting portion 121, the cut-out portion 1211 is directly provided on the outer peripheral surface of the connecting portion 121 in this embodiment, which is not only easier to process and saves processing costs, but also ensures the stability of the motor plug 12 installed at the second end portion 113 of the motor shaft 11.
[0034] The above-mentioned cut-out portion 1211 can be of any shape, as long as the cut-out portion 1211 and the inner side wall of the motor shaft body 111, or between the cut-out portion 1211 and the outer peripheral surface of the connecting portion 121, or between the cut-out portion 1211 on the outer peripheral surface of the connecting portion 121 and the inner side wall of the motor shaft body 111 can be enclosed to form the above-mentioned cut-out channel 13, its specific shape is not limited. For example, the cut-out portion 1211 can be, but is not limited to, a cut-out surface 12111, a cut-out groove (not shown in the figure), etc. Among them, the cut-out surface 12111 can be a plane, which can be located on the outer peripheral surface of the connecting portion 121 and / or the inner side wall of the motor shaft body 111. The cut-out groove can be, but is not limited to, a regular groove with an opening (not shown in the figure) and an irregular groove with an opening (not shown in the figure). Regular grooves can be, but are not limited to, polygonal and elliptical shapes. Irregular grooves can be, but are not limited to, a combination of planes and arcuate planes.
[0035] For example, in a specific embodiment, the cutting portion 1211 is a cutting surface 12111. The cutting surface 12111 is extended along the first direction. The cutting surface 12111 is provided on the outer peripheral surface of the connecting portion 121. Directly providing the cutting surface 12111 on the outer peripheral surface of the connecting portion 121 not only makes it easier to process and saves processing costs, but also ensures the stability of the motor plug 12 installed on the second end portion 113 of the motor shaft 11. The cutting surface 12111 can be, but is not limited to, a cutting plane (not shown in the figure) and a cutting wavy surface (not shown in the figure), that is, the surface of the cutting surface 12111 can be, but is not limited to, a plane or a wavy surface.
[0036] The cut surface 12111 is at least partially oriented toward the motor oil hole 114. For example, the centerline of the motor oil hole 114 and the centerline of the cut surface 12111 are coplanar. By defining the positional relationship between the centerlines of the motor oil hole 114 and the cut surface 12111, the uniformity of lubricating oil entering the motor oil hole 114 can be improved, thereby improving the uniformity of lubricating oil entering the motor bearing 14 and its vicinity. This effectively mitigates risks such as foreign matter intrusion, seizure, and order issues at the motor bearing 14.
[0037] When the center line of the motor oil hole 114 and the center line of the cutting surface 12111 are located in the same plane, the motor oil hole 114 can extend and be perpendicular to the cutting surface 12111; or, the motor oil hole 114 can extend and be set at an angle to the cutting surface 12111. Specifically, the angle between the center line of the motor oil hole 114 and the center line of the cutting surface 12111 is greater than or equal to 85 degrees and less than or equal to 95 degrees. By limiting the angle between the center line of the motor oil hole 114 and the center line of the cutting surface 12111, the uniformity of the lubricating oil entering the motor oil hole 114 can be further improved, thereby improving the uniformity of the lubricating oil entering the motor bearing 14 and its vicinity, thereby more effectively solving the risks of foreign matter intrusion at the motor bearing 14, motor bearing 14 jamming, and motor bearing 14 order problems.
[0038] The angle α between the centerline of the motor oil hole 114 and the centerline of the cut surface 12111 is defined as α. α can be, but is not limited to, 85 degrees, 86 degrees, 87 degrees, 88 degrees, 89 degrees, 90 degrees, 91 degrees, 92 degrees, 93 degrees, 94 degrees, and 95 degrees. In this embodiment, α is 90 degrees.
[0039] In some embodiments, the ratio of the vertical distance between the centerline of the motor plug 12 and the centerline of the cutting surface 12111 to the radius of the motor plug 12 is greater than or equal to 0.1 and less than or equal to 0.7. By limiting the ratio range of the vertical distance between the centerline of the motor plug 12 and the centerline of the cutting surface 12111 to the radius of the motor plug 12, not only is the amount of lubricating oil entering the cutting channel 13 guaranteed, thereby more effectively addressing the risks of foreign matter intrusion, motor bearing 14 seizure, and motor bearing 14 order issues, but also the stability of the connection between the motor plug 12 and the motor shaft body 111 is ensured.
[0040] Define the vertical distance between the centerline of the motor plug 12 and the centerline of the cut surface 12111 as L. The radius of the motor plug 12 is R. The ratio L / R is greater than or equal to 0.1 and less than or equal to 0.7. Specifically, the L / R ratio can be, but is not limited to, 0.1, 0.13, 0.2, 0.24, 0.3, 0.33, 0.4, 0.44, 0.5, 0.51, 0.6, 0.63, and 0.7.
[0041] See also Figure 6 as well as Figure 7 , Figure 6 yes Figure 3 The structural diagram of B shown; Figure 7 This is a cross-sectional diagram of a motor plug in one embodiment of the motor assembly of the present application. Figures 1 to 5In some embodiments, the motor plug 12 includes a fixing portion 122 and a connecting portion 121. The fixing portion 122 is connected to the connecting portion 121. For example, the fixing portion 122 is detachably connected or fixedly connected to the connecting portion 121. As in this embodiment, the fixing portion 122 and the connecting portion 121 are integrally formed. The connecting portion 121 is crimped into the second end portion 113 so that the motor plug 12 is more stably connected to the second end portion 113 of the motor shaft 11. In particular, the fixing portion 122 in the motor plug 12 is located outside the second end portion 113.
[0042] The above-mentioned cut surface 12111 extends from the connecting part 121 to the connecting position of the connecting part 121 and the fixing part 122. By increasing the extension length of the cut surface 12111 on the connecting part 121, the amount of lubricating oil is further increased, thereby further improving the lubrication performance of the motor bearing 14 and reducing the wear risk of the motor bearing 14.
[0043] In some embodiments, a sealing layer 1212 is provided at the end of the connecting portion 121 facing away from the fixing portion 122. Sealing layer 1212 prevents lubricating oil from entering the end surface and interior of the connecting portion 121. During medium- to high-speed rotation, a large amount of lubricating oil enters the motor bearing 14 through the cut-out channel 13 and the motor oil hole 114, increasing the amount of lubricating oil in the motor bearing 14 and effectively preventing risks such as foreign matter intrusion, seizure, and order issues.
[0044] In some embodiments, a hollow portion 1213 is provided inside the connecting portion 121 so that the interior of the connecting portion 121 is hollow, which can reduce the weight of the connecting portion 121, and further reduce the weight of the motor plug 12. In other embodiments, the fixing portion 122 can also be provided with the above-mentioned hollow portion 1213 so that the interior of the fixing portion 122 is hollow, which can further reduce the weight of the fixing portion 122, and further reduce the weight of the motor plug 12. The location and number of the above-mentioned hollow portions 1213 can be determined according to actual needs and are not limited here. Among them, the hollow portion 1213 can be at least one hollow opening (not shown in the figure). The number of hollow openings can be determined according to actual conditions and is not limited here.
[0045] In some embodiments, at least one marking groove 115 is provided on the outer peripheral surface of the motor shaft 11. The marking groove 115 can serve as a marking and alignment function. Among them, the center line of the marking groove 115, the center line of the motor oil hole 114, and the center line of the cutting surface 12111 are on the same plane. By providing the above-mentioned marking groove 115 on the outer periphery of the motor shaft 11, so that the center line of the cutting surface 12111 of the motor plug 12 just corresponds to the center line of the motor oil hole 114, etc., the accuracy of the motor plug 12 being installed on the motor shaft 11 is improved, thereby improving the uniformity of the lubricating oil entering the motor oil hole 114, etc.
[0046] In some embodiments, the motor assembly 10 includes a rotor assembly 15. The rotor assembly 15 is sleeved around the outer periphery of the motor shaft 11. Of course, the motor assembly 10 may also include other structures (not shown in the figure). Other structures may be conventionally known structures to those skilled in the art and are not limited here.
[0047] Compared with the prior art, the motor assembly includes a motor shaft, a motor plug and a motor bearing. The motor shaft includes a motor shaft body and a first end and a second end arranged at both ends of the motor shaft body. The motor shaft body is formed with a motor channel extending along a first direction. The first end is used to communicate with the spline. The second end is provided with a motor oil hole. The motor plug includes a connecting portion. The connecting portion is arranged in the second end. A cut-shaped channel is formed between the outer peripheral surface of the connecting portion and the inner side wall of the motor shaft body. The cut-shaped channels are all connected to the motor channel and the motor oil hole. The motor bearing is sleeved on the outer periphery of the second end. The spline, the motor channel, the cut-shaped channel and the motor oil hole form a lubrication channel for lubricating the motor bearing. Therefore, by arranging the above-mentioned cut-shaped channel between the outer peripheral surface of the connecting part of the motor plug and the inner side wall of the motor shaft body, under medium and high-speed rotation, most of the lubricating oil enters the motor oil hole through the cut-shaped channel, increasing the amount of lubricating oil at the motor bearing, improving the lubrication condition of the motor bearing, thereby reducing the risks of foreign matter intrusion, motor bearing jamming and motor bearing order problems caused by insufficient lubricating oil in the motor bearing, thereby improving the performance of the motor bearing and reducing wear.
[0048] The terms "first", "second" and "third" in this application are only used for descriptive purposes and should not be understood as indicating the number of the indicated technical features. Thus, the features defined as "first", "second" and "third" can explicitly or implicitly include at least one of these features. In the embodiments of the present application, all directional indications (such as up, down, left, right, front, back ...) are only used to explain the relative positional relationship, movement, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication also changes accordingly. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units that are not listed, or optionally also includes other steps or units inherent to these processes, methods, products or devices.
[0049] The above description is merely an embodiment of the present application and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.
Claims
1. A motor assembly, characterized in that: include: A motor shaft comprises a motor shaft body and a first end portion and a second end portion provided at both ends of the motor shaft body, wherein the motor shaft body is formed with a motor channel extending along a first direction, the first end portion is used to communicate with the spline, and the second end portion is provided with a motor oil hole; A motor plug, comprising a connecting portion, the connecting portion being disposed within the second end portion, a cut-shaped channel being formed between an outer peripheral surface of the connecting portion and an inner side wall of the motor shaft body, the cut-shaped channel being in communication with the motor channel and the motor oil hole; a motor bearing, sleeved on the outer periphery of the second end portion; The spline, the motor channel, the cut channel and the motor oil hole form a lubrication channel for lubricating the motor bearing.
2. The motor assembly according to claim 1, wherein: A cut-out portion extending along the first direction is provided on the outer periphery of the connecting portion, and the cut-out portion and the inner side wall of the motor shaft body are surrounded to form the cut-out channel.
3. The motor assembly according to claim 2, characterized in that The cutting portion is a cutting surface, and the cutting surface is extended along the first direction.
4. The motor assembly according to claim 3, characterized in that The center line of the motor oil hole and the center line of the cutting surface are located in the same plane.
5. The motor assembly according to claim 4, characterized in that The angle between the center line of the motor oil hole and the center line of the cutting surface is greater than or equal to 85 degrees and less than or equal to 95 degrees.
6. The motor assembly according to claim 3, characterized in that The ratio between the vertical distance between the center line of the motor plug and the center line of the cutting surface and the radius of the motor plug is greater than or equal to 0.1 and less than or equal to 0.
7.
7. The motor assembly according to any one of claims 3 to 6, characterized in that: The motor plug includes a fixing portion and a connecting portion connected to the fixing portion, the connecting portion is crimped into the second end portion, and the fixing portion is located outside the second end portion; Wherein, the cut surface extends from the connecting portion to the connecting position of the connecting portion and the fixing portion.
8. The motor assembly according to claim 7, characterized in that A sealing layer is provided at one end of the connecting portion away from the fixing portion; and / or a hollow portion is provided inside the connecting portion.
9. The motor assembly according to any one of claims 3 to 6, characterized in that: A marking groove is provided on the outer peripheral surface of the motor shaft, and a center line of the marking groove, a center line of the motor oil hole and a center line of the cutting surface are on the same plane.
10. A vehicle, characterized in that: A motor assembly comprising the motor assembly according to any one of claims 1 to 9.