Motor assembly and vehicle

Abstract

The utility model discloses a motor assembly and a vehicle, the motor assembly comprises a motor shaft, a motor plug and a motor bearing, the motor shaft comprises a motor shaft body and a first end portion and a second end portion arranged at two ends of the motor shaft body, the motor shaft body forms a motor channel extending along a first direction, the first end portion is used for communicating with a spline, and the second end portion is used for communicating with a second direction. A first motor oil hole is formed in the second end part; the motor plug comprises a connecting part, the connecting part is arranged in the second end part, a surrounding channel is defined between the peripheral surface of the connecting part and the inner side wall of the second end part, the surrounding channel extends in a surrounding mode in the first direction, and the surrounding channel communicates with the motor channel and the first motor oil hole; the motor bearing sleeves the periphery of the second end part; the spline, the motor channel, the surrounding channel and the first motor oil hole form a lubricating channel which is used for lubricating a motor bearing. The motor assembly can reduce the failure risk of the motor bearing and prolong the service life of the motor bearing.

Description

Technical Field

[0001] The present application relates to the technical field of vehicles, and particularly to an electric machine assembly and a vehicle. Background Art

[0002] In an oil-cooled electric drive assembly, the rotor assembly of the electric machine assembly uses oil slinging cooling. Due to the structural limitations at the inner position of the motor shaft near the motor bearing, little or only a small part of the lubricating oil enters the motor bearing and its vicinity through the motor oil holes of the motor shaft, resulting in untimely cooling of the motor bearing, and further leading to the failure of the motor bearing, etc. Summary of the Utility Model

[0003] The present application provides an electric machine assembly and a vehicle to solve the technical problems that little or only a small part of the lubricating oil enters the motor bearing and its vicinity through the motor oil holes of the motor shaft in the electric machine assembly of the oil-cooled electric drive assembly, resulting in untimely cooling of the motor bearing, and further leading to the failure of the motor bearing, etc.

[0004] To solve the above technical problems, the present application proposes an electric machine assembly, which includes: a motor shaft, including a motor shaft body and a first end and a second end provided at both ends of the motor shaft body. The motor shaft body is formed with a motor channel extending in a first direction. The first end is used to communicate with a spline, and the second end is provided with a first motor oil hole; a motor plug, including a connecting portion, the connecting portion is disposed inside the second end. A surrounding channel is formed between the outer peripheral surface of the connecting portion and the inner side wall of the second end, and the surrounding channel extends in a surrounding manner along the first direction. The surrounding channel communicates with both the motor channel and the first motor oil hole; a motor bearing is sleeved on the outer periphery of the second end; wherein, the spline, the motor channel, the surrounding channel, and the first motor oil hole form a lubricating channel for lubricating the motor bearing.

[0005] Wherein, a first surrounding groove is provided on the outer peripheral surface of the connecting portion, and a surrounding channel is formed between the first surrounding groove of the connecting portion and the inner side wall of the second end; or, a second surrounding groove is provided on the inner side wall of the second end, and a surrounding channel is formed between the connecting portion and the second surrounding groove of the second end; or, a first surrounding groove is provided on the outer peripheral surface of the connecting portion, and a second surrounding groove is provided on the inner side wall of the second end, and a surrounding channel is formed between the first surrounding groove and the second surrounding groove.

[0006] Wherein, the surrounding channel is a spiral channel.

[0007] Wherein, the spiral channel includes at least two threads, and the thread lines of the threads rotate and rise clockwise.

[0008] Wherein, a pitch is formed between adjacent threads, and multiple pitches are equal, and at least one thread communicates with the first motor oil hole.

[0009] Among them, the motor plug includes a fixing part and a connecting part connected to the fixing part. The connecting part is connected inside the second end part, and the fixing part is located outside the second end part. Among them, a spiral channel is formed on the outer peripheral surface of the connecting part, and at least two threads extend from one end of the connecting part close to the motor channel to the connection position between the connecting part and the fixing part.

[0010] Among them, the groove depth dimension of the spiral channel is smaller than the cross-sectional radius of the connecting part along the direction perpendicular to the first direction.

[0011] Among them, an oil storage area is provided between the inner side wall of the second end part communicating with the first motor oil hole and / or the inner side wall of the connecting part close to the first motor oil hole. The oil storage area is respectively communicated with the first motor oil hole and the surrounding channel.

[0012] Among them, a sealing layer is provided at one end of the connecting part facing the motor channel; and / or, a hollow part is provided inside the connecting part.

[0013] To solve the above technical problems, the present application proposes a vehicle, including the motor assembly described above.

[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 part and a second end part provided at both ends of the motor shaft body. A motor channel extending along the first direction is formed in the motor shaft body. The first end part is used to communicate with the spline. The second end part is provided with a first motor oil hole. The motor plug includes a connecting part. The connecting part is arranged inside the second end part. A surrounding channel is formed by enclosing between the outer peripheral surface of the connecting part and the inner side wall of the second end part. The surrounding channel extends in a surrounding manner along the first direction. The surrounding channel is communicated with both the motor channel and the first motor oil hole. The motor bearing is sleeved on the outer periphery of the second end part. Among them, the spline, the motor channel, the surrounding channel, and the first motor oil hole form a lubrication channel for lubricating the motor bearing.

[0015] By providing the above surrounding channel between the outer peripheral surface of the connecting part of the motor plug and the inner side wall of the motor shaft body, the surrounding channel not only enables part of the lubricating oil to smoothly enter its interior, increasing the amount of lubricating oil in the motor bearing and its vicinity; but also the surrounding channel can increase the flow path of the lubricating oil and can also play a certain oil storage function. Through the above surrounding channel, not only the amount of lubricating oil in the motor bearing and its vicinity is increased, the motor bearing is quickly cooled, the risk of premature failure and overheating of the motor bearing is reduced, and thus the service life of the motor bearing is improved; but also the risk of jamming of the motor bearing is reduced, and thus the performance of the motor bearing is improved and wear is reduced, etc. Description of the Drawings

[0016] To more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for description in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings, where:

[0017] Figure 1 is a partial cross-sectional schematic diagram of an embodiment of the motor assembly of the present application;

[0018] Figure 2 is Figure 1 the structural schematic diagram of A shown;

[0019] Figure 3 is the first structural schematic diagram of the motor plug in the motor assembly of the present application;

[0020] Figure 4 is the second structural schematic diagram of the motor plug in the motor assembly of the present application;

[0021] Figure 5 is the cross-sectional schematic diagram of the motor shaft and the motor plug in the motor assembly of the present application.

[0022] Reference numerals in the drawings: 10, motor assembly; 11, motor shaft; 111, motor shaft body; 1111, motor channel; 112, first end; 113, second end; 114, first motor oil hole; 115, second motor oil hole; 116, third motor oil hole; 12, motor plug; 121, connecting portion; 1211, first surrounding groove; 1212, sealing layer; 1213, hollowed-out portion; 122, fixing portion; 13, surrounding channel; 131, thread; 14, motor bearing; 15, rotor assembly. Detailed implementation manners

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, rather than all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present application.

[0024] Referring to "embodiments" herein means that the specific features, structures or characteristics described in connection with the embodiments can be included in at least one embodiment of the present application. The phrase appears in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0025] The following describes in detail the motor assembly and vehicle provided by the present utility model in conjunction with embodiments.

[0026] Please refer to Figure 1 , Figure 2 and Figure 3 , Figure 1 which is a partial cross-sectional schematic diagram of an embodiment of the motor assembly of the present application; Figure 2 is Figure 1 the structural schematic diagram of A shown; Figure 3 which is the first structural schematic diagram of the motor plug of the motor assembly of the present application. The present application provides a motor assembly. The motor assembly 10 is cooled by an oil slinging cooling method. 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 oppositely arranged. The first end 112 is arranged at one end of the motor shaft body 111. 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 extends along a first direction X. The first end 112 is used to communicate with a spline (not shown in the figure). The lubricating oil enters the first end 112 of the motor shaft body 111 from the spline (not shown in the figure). The above-mentioned first direction X can be but is not limited to the axial direction of the motor shaft 11.

[0027] The second end 113 is provided with a first motor oil hole 114. The first motor oil hole 114 is communicated with the motor channel 1111. The motor plug 12 includes a connecting portion 121. The connecting portion 121 is arranged in the second end 113, for example, the connecting portion 121 is inserted into the second end 113 in an interference fit manner; or, the connecting portion 121 is crimped in the second end 113. A surrounding 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 surrounding channel 13 is arranged in a surrounding shape, for example, formed by sequentially connecting the heads and tails of a plurality of surrounding grooves (not shown in the figure). And the surrounding channel 13 extends in a surrounding manner along the first direction X, for example, a plurality of surrounding grooves extend in sequence along the first direction X with their heads and tails. The surrounding channel 13 is communicated with both the motor channel 1111 and the first motor oil hole 114. The motor bearing 14 is sleeved on the outer periphery of the second end 113, that is, the lubricating oil can flow in the motor channel 1111, the surrounding channel 13, and the first motor oil hole 114, so that the lubricating oil is supplied to the motor bearing 14 and its vicinity.

[0028] The above spline, motor channel 1111, surrounding channel 13, and first motor oil hole 114 form a lubrication channel (not shown in the figure) for lubricating the motor bearing 14. Under the high-speed rotation of the motor assembly 10, part of the lubricating oil enters the motor bearing 14 and its vicinity in sequence through the spline, motor channel 1111, surrounding channel 13, and first motor oil hole 114, increasing the amount of lubricating oil in the motor bearing 14 and its vicinity.

[0029] By providing the above surrounding channel 13 between the outer peripheral surface of the connecting portion 121 of the motor plug 12 and the inner side wall of the motor shaft body 111, the surrounding channel 13 not only enables part of the lubricating oil to smoothly enter its interior, increasing the amount of lubricating oil in the motor bearing 14 and its vicinity; but also the surrounding channel 13 can extend the flow path of the lubricating oil and can also play a certain oil storage function. Through the above surrounding channel 13, not only the amount of lubricating oil in the motor bearing 14 and its vicinity is increased, the motor bearing 14 is quickly cooled, the risk of premature failure and overheating of the motor bearing 14 is reduced, and thus the service life of the motor bearing 14 is improved; but also the risk of jamming of the motor bearing 14 is reduced, and thus the performance of the motor bearing 14 is improved and wear is reduced.

[0030] The above surrounding channel 13 can be formed on the outer peripheral surface of the connecting portion 121 and / or the inner side wall of the second end portion 113. As in the first embodiment, the surrounding channel 13 is formed on the outer peripheral surface of the connecting portion 121. Specifically, a first surrounding groove 1211 is recessed on the outer peripheral surface of the connecting portion 121. The surrounding channel 13 is formed by enclosing between the first surrounding groove 1211 of the connecting portion 121 and the inner side wall of the second end portion 113. Among them, the first surrounding groove 1211 is arranged in a surrounding manner along the first direction X on the outer peripheral surface of the connecting portion 121. By providing the first surrounding groove 1211 on the outer peripheral surface of the connecting portion 121, it is easy to process and cost-saving.

[0031] As in the second embodiment, the surrounding channel 13 is provided on the inner side wall of the second end portion 113. Specifically, a second surrounding groove (not shown in the figure) is provided on the inner side wall of the second end portion 113. The surrounding channel 13 is formed by enclosing between the connecting portion 121 and the second surrounding groove of the second end. Among them, the second surrounding groove is arranged in a surrounding manner along the first direction X on the inner side wall of the second end. By providing the second surrounding groove on the inner side wall of the second end, the above surrounding channel 13 can be formed.

[0032] In the third embodiment, the surrounding channel 13 is disposed between the outer peripheral surface of the connecting portion 121 and the inner side wall of the second end portion 113 at the same time. Specifically, a first surrounding groove 1211 is provided on the outer peripheral surface of the connecting portion 121. A second surrounding groove is provided on the inner side wall of the second end portion 113. The surrounding channel 13 is formed by enclosing between the first surrounding groove 1211 and the second surrounding groove. Among them, the first surrounding groove 1211 is disposed around the outer peripheral surface of the connecting portion 121 along the first direction X. The second surrounding groove is disposed around the inner side wall of the second end portion 113 along the first direction X. By the cooperation of the first surrounding groove 1211 disposed around the outer peripheral surface of the connecting portion 121 along the first direction X and the second surrounding groove disposed around the inner side wall of the second end portion 113 along the first direction X, the surrounding channel 13 can be formed.

[0033] The shape of the first surrounding groove 1211 may be at least partially the same as that of the surrounding channel 13. For example, when the cross-section of the surrounding channel 13 perpendicular to the first direction X is circular, the cross-section of the first surrounding groove 1211 and / or the second surrounding groove perpendicular to the first direction X may be circular or semi-circular, etc. For example, when the cross-section of the surrounding channel 13 perpendicular to the first direction X is square, the cross-section of the first surrounding groove 1211 and / or the second surrounding groove perpendicular to the first direction X may be concave, etc. Among them, the cross-sectional shape of the first surrounding channel 13 perpendicular to the first direction X may be, but is not limited to, circular, square, triangular, trapezoidal, etc.

[0034] In some embodiments, the surrounding channel 13 is a spiral channel (not shown in the figure). The spiral channel is arranged in a spiral shape and extends spirally along the first direction X. The spiral channel is not only easier to process and saves costs, but also can increase the movement path of the lubricating oil, increase the amount of lubricating oil, and further increase the amount of lubricating oil at the motor bearing 14 and its vicinity, thereby reducing the risk of failure of the motor bearing 14 and the like.

[0035] In some embodiments, the spiral channel includes at least two threads 131. The number of the threads 131 may be, but is not limited to, two, three, four or more. The thread lines of the multiple threads 131 rotate upward in a clockwise direction so that the lubricating oil entering the spiral channel rotates upward in a clockwise direction. By defining the rotation direction of the thread lines in the above-mentioned threads 131, when the motor assembly 10 is running at medium and high speeds and rotating forward, the spiral channel can better receive the lubricating oil due to the direction of the thread lines; when the motor assembly 10 is running at medium and high speeds and rotating in reverse, the spiral channel can prevent the lubricating oil from entering the spiral channel due to the direction of the thread lines. Thus, by defining the rotation direction of the thread lines and the forward and reverse rotation of the motor assembly 10, etc., it is possible to control whether the lubricating oil enters the spiral channel or not.

[0036] The threads 131 and the pitch in the above spiral channel can be regularly arranged, which is convenient for processing and cost-saving. In some embodiments, at least one thread 131 is communicatively arranged with the first motor oil hole 114 so that the lubricating oil in the thread 131 enters the first motor oil hole 114. A pitch is formed between adjacent threads 131. When the number of threads 131 is more than three, along the first direction X, multiple pitches are equal; or multiple pitches increase; or multiple pitches decrease, etc. The above pitch change can be determined according to actual needs and is not limited herein.

[0037] In this embodiment, multiple pitches are equal, which is not only convenient for processing and cost-saving, but also can improve the uniformity of the movement of the lubricating oil in the spiral channel, thereby improving the cooling uniformity of the motor bearing 14 and its vicinity, and further reducing the risk of failure of the motor bearing 14.

[0038] Please continue to refer to Figures 1 to 3 , in 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. In this embodiment, the fixing portion 122 and the connecting portion 121 are integrally formed. The connecting portion 121 is press-fitted 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. Among them, the fixing portion 122 of the motor plug 12 is located outside the second end portion 113.

[0039] Among them, the spiral channel is formed on the outer peripheral surface of the connecting portion 121. At least two threads 131 extend from one end of the connecting portion 121 close to the motor channel 1111 to the connection position of the connecting portion 121 and the fixing portion 122. By increasing the extension length of the thread 131, not only can the movement path of the lubricating oil be increased, but also the amount of lubricating oil near the motor bearing 14 and its vicinity can be further increased, thereby reducing the risk of failure of the motor bearing 14. In this embodiment, the pitches between the threads 131 on the connecting portion 121 are equal.

[0040] In other embodiments, at least two threads 131 can extend from one end of the connecting portion 121 close to the motor channel 1111 to one end position of the connecting portion 121 close to the first motor oil hole 114, without extending to the connection position of the connecting portion 121 and the fixing portion 122.

[0041] In some embodiments, the groove depth dimension of the spiral channel is smaller than the cross-sectional radius of the connecting portion 121 along a direction perpendicular to the first direction X. Herein, a groove depth is formed on a cross-section of the spiral channel along a direction perpendicular to the first direction X, and the groove depth is the depth dimension of the spiral channel. The cross-sectional shape of the connecting portion 121 along a direction perpendicular to the first direction X is circular, and the radius of the circle is the above-mentioned cross-sectional radius. By defining the groove depth of the spiral channel and the cross-sectional radius of the connecting portion 121, the amount of lubricating oil can be increased, etc., thereby improving the service life and performance of the motor bearing 14, etc.

[0042] In some embodiments, an oil storage area (not shown in the figure) is provided between the inner side wall of the second end portion 113 communicating with the first motor oil hole 114 and / or the inner side wall of the connecting portion 121 close to the first motor oil hole 114. The oil storage area communicates with the first motor oil hole 114 and the surrounding channel 13 respectively. The oil storage area can perform a certain oil storage function. When the motor assembly 10 is not started, the lubricating oil at the spline cannot reach the motor bearing 14 and its vicinity, and the original lubricating oil stored in the oil storage area can lubricate the motor bearing 14, thereby solving the problem of insufficient lubricating oil caused by the lubricating oil at the spline not reaching the motor bearing 14, and further reducing the failure risk of the motor bearing 14.

[0043] The above-mentioned oil storage area can be arranged in at least three positions. In a specific embodiment, the above-mentioned oil storage area is arranged at the inner side wall of the second end portion 113 communicating with the first motor oil hole 114. In another specific embodiment, the above-mentioned oil storage area is arranged at the inner side wall of the connecting portion 121 close to the first motor oil hole 114. In another alternative embodiment, a part of the oil storage area is arranged at the inner side wall of the second end portion 113 communicating with the first motor oil hole 114, and another part of the oil storage area is arranged at the inner wall of the connecting portion 121 close to the first motor oil hole 114, and the above-mentioned part of the oil storage area and the other part of the oil storage area are combined to form the above-mentioned oil storage area. Among them, the orthographic projection of the first motor oil hole 114 in the oil storage area is located within the oil storage area. The oil storage area can be of any shape and is not limited herein.

[0044] Please refer to Figure 4 and Figure 5 , Figure 4 which is the second structural schematic diagram of the motor plug in the motor assembly of the present application; Figure 5 which is the cross-sectional schematic diagram of the motor shaft and the motor plug in the motor assembly of the present application. Combining Figures 1 to 3 , in some embodiments, a sealing layer 1212 is provided at one end of the connecting portion 121 facing the motor channel 1111. A sealing layer 1212 is provided at one end of the connecting portion 121 facing the motor channel 1111. The sealing layer 1212 can prevent the lubricating oil from entering the end face and the interior of the connecting portion 121, etc., so that more lubricating oil enters the surrounding channel 13, thereby further increasing the amount of lubricating oil in the motor bearing 14 and its vicinity, and reducing the failure risk of the motor bearing 14, etc.

[0045] In some embodiments, a hollowed-out portion 1213 is provided inside the connecting portion 121, so that the inside of the connecting portion 121 is hollow, which can reduce the weight of the connecting portion 121, etc., and further reduce the weight of the motor plug 12, etc. In other embodiments, the above-mentioned hollowed-out portion 1213 may also be provided in the fixing portion 122, so that the inside of the fixing portion 122 is hollow, which can further reduce the weight of the fixing portion 122, etc., and further reduce the weight of the motor plug 12, etc. The position and number of the above-mentioned hollowed-out portion 1213 can be determined according to actual needs and are not limited herein. The hollowed-out portion 1213 may be at least one hollow opening (not shown in the figure). The number of hollow openings can be determined according to actual situations and is not limited herein.

[0046] When the above-mentioned hollowed-out portion 1213 is provided in the connecting portion 121, the groove depth of the spiral channel is less than the vertical thickness between the outer surface of the connecting portion 121 and the inner side wall of the hollowed-out portion 1213. In the actual process, the groove depth of the spiral channel can be set arbitrarily without limitation as long as the connection strength between the connecting portion 121 and the motor shaft body 111 is ensured.

[0047] In other embodiments, a closed layer 1212 is provided at one end of the connecting portion 121 facing the motor channel 1111. At the same time, a hollowed-out portion 1213 is provided inside the connecting portion 121. Through the joint cooperation of the above-mentioned closed layer 1212 and the hollowed-out portion 1213, the amount of lubricating oil at the motor bearing 14 is increased, and at the same time, the weight of the motor plug 12, etc., can also be reduced.

[0048] In some embodiments, by controlling the pitch change, groove depth change, and the number of threads 131 in the spiral channel, etc., the required amount of lubricating oil is satisfied. In addition, different rotational speeds of the motor assembly 10, pitch change, groove depth change, and the number of threads 131 in the spiral channel, etc., further control the amount of lubricating oil at the motor bearing 14, and thus control the lubrication and cooling effect of the motor bearing 14.

[0049] In some embodiments, the motor assembly 10 includes a rotor assembly 15. The rotor assembly 15 is sleeved on the outer periphery of the motor shaft 11. Of course, the motor assembly 10 may also include other structures (not shown in the figure). The other structures may be structures commonly known to those skilled in the art and are not limited herein.

[0050] In some embodiments, the motor assembly 10 further includes a second motor oil hole 115 and a third motor oil hole 116. The second motor oil hole 115 and the third motor oil hole 116 are respectively communicated with the motor channel 1111. When the rotor assembly 15 rotates and works, the centrifugal force causes the lubricating oil to enter the inside of the rotor assembly 15 along the first motor oil hole 114 and the second motor oil hole 115 respectively, which can cool the inside of the rotor assembly 15, and thus improve the service performance of the motor assembly 10.

[0051] The above-mentioned second motor oil hole 115 and the second motor oil hole 115 are closer to the spline than the first motor oil hole 114. By providing the surrounding channel 13 in the motor assembly 10, it is ensured that lubricating oil can flow out with sufficient amount of lubricating oil even at the farthest place from the spline under medium and high speed conditions.

[0052] Please refer to Figures 1 to 5 , this application provides a vehicle. The vehicle (not shown in the figure) includes the above-mentioned motor assembly 10. It should be noted that the motor assembly 10 in this embodiment is the motor assembly 10 described in the above-mentioned embodiment, which will not be elaborated here. Through the above-mentioned motor assembly 10, the vehicle not only quickly cools the motor bearing 14, reduces the risk of premature failure and overheating of the motor bearing 14, and thus improves the service life of the motor bearing 14; but also reduces risks such as jamming of the motor bearing 14, and thus improves the performance of the motor bearing 14 and reduces wear, etc.

[0053] The terms "first", "second", and "third" in this application are only used for descriptive purposes and cannot be construed as indicating the quantity of the indicated technical features. Thus, the features defined with "first", "second", and "third" may explicitly or implicitly include at least one of such features. All directional indications (such as up, down, left, right, front, back...) in the embodiments of this application are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion. 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 may optionally further include unlisted steps or units, or may optionally further include other steps or units inherent to these processes, methods, products, or devices.

[0054] The above are only the embodiments of this application, and do not limit the patent scope of this application accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of this application, or directly or indirectly applied in other related technical fields, shall be similarly included in the patent protection scope of this application.

Claims

1. A motor assembly, characterized in that: The motor assembly comprises: A motor shaft, comprising a motor shaft body and a first end and a second end disposed 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 is used to communicate with a spline, and the second end is provided with a first motor oil hole; A motor plug, comprising a connecting portion, the connecting portion being arranged in the second end portion, a surrounding channel being formed between the outer peripheral surface of the connecting portion and the inner side wall of the second end portion, the surrounding channel extending in a surrounding manner along the first direction, and the surrounding channel being communicated with the motor channel and the first motor oil hole; A motor bearing is sleeved on the outer periphery of the second end portion; The spline, the motor channel, the surrounding channel and the first motor oil hole form a lubrication channel for lubricating the motor bearing.

2. The motor assembly according to claim 1, characterized in that: The outer peripheral surface of the connecting portion is provided with a first surrounding groove, and the surrounding channel is formed between the first surrounding groove of the connecting portion and the inner side wall of the second end portion; Alternatively, a second surrounding groove is provided on the inner side wall of the second end portion, and the surrounding channel is formed between the connecting portion and the second surrounding groove of the second end; Alternatively, a first surrounding groove is provided on the outer peripheral surface of the connecting portion, a second surrounding groove is provided on the inner side wall of the second end portion, and the surrounding channel is formed between the first surrounding groove and the second surrounding groove.

3. The motor assembly according to claim 1, characterized in that: The surrounding channel is a spiral channel.

4. The motor assembly according to claim 3, characterized in that: The spiral channel includes at least two threads, and the thread lines of the threads rise in a clockwise rotation.

5. The motor assembly according to claim 4, characterized in that: A pitch is formed between adjacent threads, and the plurality of pitches are equal. At least one thread is connected to the first motor oil hole.

6. The motor assembly according to claim 5, characterized in that: The motor plug includes a fixing portion and a connecting portion connected to the fixing portion, the connecting portion is connected inside the second end portion, and the fixing portion is located outside the second end portion; The spiral channel is formed on the outer peripheral surface of the connecting portion, and at least two of the threads extend from one end of the connecting portion close to the motor channel to the connecting position of the connecting portion and the fixing portion.

7. The motor assembly according to claim 3, characterized in that: The groove depth of the spiral channel is smaller than the cross-sectional radius of the connecting portion along the direction perpendicular to the first direction.

8. The motor assembly according to any one of claims 1 to 7, characterized in that: An oil storage area is provided between the inner side wall of the second end portion connected to the first motor oil hole and / or the inner side wall of the connecting portion close to the first motor oil hole, and the oil storage area is respectively connected to the first motor oil hole and the surrounding channel.

9. The motor assembly according to any one of claims 1 to 7, characterized in that: A sealing layer is provided at one end of the connecting portion facing the motor channel; and / or a hollow portion is provided inside the connecting portion.

10. A vehicle, characterized in that: A motor assembly comprising any one of claims 1 to 9.

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