An oil ring, a driving motor, an electric driving system and a vehicle

Abstract

The application provides an oil ring, a driving motor, an electric driving system and a vehicle. The oil ring is applied to the driving motor. The oil ring is a non-integer circular oil ring. An oil injection groove is arranged on the oil ring along the circumferential direction of the oil ring. Thus, the sealing of the oil injection groove can be realized by using a closed annular sealing ring. Compared with the prior art, the number of sealing rings can be effectively reduced, thereby helping to simplify the overall structure of the oil ring and facilitating the assembly and connection of the oil ring. In addition, the oil ring can form a continuous seal, which helps to reduce the failure rate of the sealing ring and improve the sealing effect of the sealing ring. In addition, the volume of the oil injection groove on the oil ring can be reduced, thereby reducing the demand for oil, helping to improve the situation that the oil cannot fill the entire oil injection groove, and improving the situation that the oil hole cannot stably spray oil, thereby improving the cooling and lubricating effect of the oil on the working components. In addition, the oil ring adopts a non-integer circular ring, which also helps to reduce the overall weight of the oil ring.

Description

Technical Field

[0001] This application relates to the field of oil ring technology, and in particular to an oil ring, a drive motor, an electric drive system, and a vehicle. Background Technology

[0002] As part of the vehicle's drive motor, the oil ring in the vehicle stores and sprays oil, which cools and lubricates the motor. This is crucial for maintaining the motor's normal operation and good performance.

[0003] In related technologies, oil rings are mostly circular structures, and usually two or more sealing rings are used to seal with the motor housing to form a circular oil cavity, which is cooled by spraying through the oil holes on the oil ring.

[0004] However, this method introduces a large number of sealing rings, resulting in a complex oil ring structure, complicated assembly, and a high probability of failure. Furthermore, the entire oil chamber has a high oil demand, which can easily lead to insufficient oil filling of the entire chamber. This can cause some oil holes to fail to spray oil stably, affecting the cooling and lubrication effect of the oil ring. Summary of the Invention

[0005] In view of this, this application provides an oil ring, a drive motor, an electric drive system, and a vehicle to at least solve the problems of complex assembly and poor cooling and lubrication effect of oil rings in the prior art.

[0006] To achieve the above objectives, the technical solution of this application is implemented as follows:

[0007] This application provides an oil ring for use in a drive motor. The oil ring is a non-circular oil ring, and an oil spray groove is formed on the oil ring along the circumferential direction.

[0008] Optionally, a sealing groove is provided on the oil ring along the circumferential direction, the sealing groove surrounds the periphery of the oil injection groove, and a sealing ring is embedded in the sealing groove.

[0009] Optionally, the oil ring includes an outer peripheral surface, a first end face, and a second end face; the outer peripheral surface is arranged along the circumferential direction of the oil ring, the first end face is located on both sides of the outer peripheral surface along the axial direction of the oil ring, the second end face is located on both sides of the outer peripheral surface along the circumferential direction of the oil ring, and the first end face and the second end face are connected to each other to form the edge of the oil ring; the sealing groove is provided on the outer peripheral surface, and / or the sealing groove is provided on the first end face and the second end face.

[0010] Optionally, the sealing groove has a closed annular structure.

[0011] Optionally, the oil ring includes a first shaft end and a second shaft end, the outer diameter of the first shaft end being larger than the outer diameter of the second shaft end; the sealing groove is disposed on the outer peripheral surface, a portion of the sealing groove being located at the first shaft end and a portion of the sealing groove being located at the second shaft end.

[0012] Optionally, the oil injection groove is provided with a plurality of oil holes, which are spaced apart along the circumferential direction of the oil ring, and at least some of the oil holes are spaced apart from each other.

[0013] This application also provides a drive motor, including the oil ring described in any of the preceding claims.

[0014] Optionally, it further includes a housing, a stator assembly, and a rotor assembly; the stator assembly is disposed within the housing, the rotor assembly is disposed within the stator assembly, and rotates relative to the stator assembly under the action of electromagnetic induction; the stator assembly includes a stator winding and a stator core, the stator core is sleeved on at least a portion of the outer peripheral surface of the stator winding, and the oil ring is sleeved on the outer peripheral surface of the stator winding; along the axial direction of the oil ring, one side of the oil ring abuts against the stator core, and the other side abuts against the end of the housing.

[0015] Optionally, the end of the housing is a cylindrical structure, and a limiting member is provided on the inner wall of the cylindrical structure. The limiting member extends in a direction toward the center of the cylindrical structure and abuts against the end face of the oil ring to restrict the movement of the oil ring in its circumferential direction.

[0016] Optionally, the limiting member and the housing are integral; and / or, there are two limiting members, which are spaced apart circumferentially along the cylindrical structure; and / or, the limiting member is a hollow structure.

[0017] This application also provides an electric drive system, including the drive motor described in any of the preceding claims.

[0018] This application also provides a vehicle including any of the oil rings, drive motors, or electric drive systems described in the preceding claims.

[0019] Compared with existing technologies, the oil ring, drive motor, electric drive system, and vehicle described in this application have the following advantages:

[0020] The oil ring in this application is a non-circular ring, meaning it has an opening along its circumference. This allows for sealing of the injection groove using a single closed annular seal, effectively reducing the number of seals compared to existing technologies. This simplifies the overall structure of the oil ring and facilitates assembly. Furthermore, using a single closed annular seal creates a continuous seal, reducing seal failure rates, improving sealing performance, and giving the oil ring excellent sealing capabilities. This also helps save on consumable materials and control production costs. Additionally, the non-circular design reduces the volume of the injection groove, decreasing the required oil volume. This helps address situations where oil cannot completely fill the injection groove and ensures stable oil spray from the oil holes, thus improving the cooling and lubrication of the working parts. Finally, the non-circular design also reduces the overall weight of the oil ring, enabling a lightweight design for the drive motor.

[0021] The drive motor, electric drive system, and vehicle of this application have the same or similar advantages as the prior art and the aforementioned oil ring, which will not be elaborated here. Attached Figure Description

[0022] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0023] Figure 1 This is a schematic diagram of the oil ring portion in a drive motor according to an embodiment of this application;

[0024] Figure 2 This is a cross-sectional view of the oil ring portion of a drive motor cut radially along the oil ring in an embodiment of this application;

[0025] Figure 3 yes Figure 2 A magnified view of part A in the middle;

[0026] Figure 4 yes Figure 2 A magnified view of part B in the middle;

[0027] Figure 5 This is a cross-sectional view of the oil ring portion of another drive motor in this application embodiment, cut along the radial direction of the oil ring;

[0028] Figure 6 yes Figure 5 A magnified view of part C in the middle;

[0029] Figure 7 yes Figure 5 A magnified view of part D in the middle;

[0030] Figure 8 This is a schematic diagram of the end of a housing in an embodiment of this application;

[0031] Figure 9 This is a schematic diagram of an embodiment of the present application in which an oil ring is installed at the end of the housing.

[0032] Explanation of reference numerals in the attached figures:

[0033] 1-Oil ring, 10-Oil spray groove, 11-Outer peripheral surface, 12-First end face, 13-Second end face, 14-Sealing groove, 15-Oil hole, 2-Sealing ring, 21-Circumferential sealing edge, 22-Axial sealing edge, 3-Housing shell, 31-Limiting component, 4-Stator winding, 5-Stator core. Detailed Implementation

[0034] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0035] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0036] It should be understood that the phrase "some embodiments" throughout the specification means that a specific feature, structure, or characteristic related to an embodiment is included in at least one embodiment of this application. Therefore, "some embodiments" appearing throughout the specification does not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments.

[0037] The following detailed description of an oil ring, drive motor, electric drive system, and vehicle provided in this application is illustrated through specific embodiments.

[0038] This application provides an oil ring. Figure 1 This paper shows a schematic diagram of the oil ring portion in a drive motor according to an embodiment of this application. (Refer to...) Figure 1The oil ring 1 is a non-circular oil ring, and an oil spray groove 10 is provided on the oil ring 1 along the circumference of the oil ring 1.

[0039] In this embodiment, the oil ring 1 can be applied not only to the drive motor in electric vehicles but also to the engine assembly in fuel vehicles. The main function of the oil ring 1 is to store and spray oil, ensuring that the oil is evenly sprayed onto the parts requiring lubrication, thereby reducing friction and wear, and improving the operating efficiency and service life of the parts. In drive motors cooled by oil cooling, the oil 1 also plays a cooling role. The circulating oil can carry away the heat generated during the operation of the drive motor, thus keeping the drive motor operating within its normal temperature range. The oil can be organic oil, synthetic oil, etc., possessing good cooling and lubrication functions. The specific type of oil can be selected according to actual needs, and this embodiment does not impose any restrictions on this.

[0040] Specifically, the oil ring 1 is a non-circular oil ring, meaning that the oil ring 1 has an opening along its circumference. The size of the opening is determined according to actual needs. With the overall circle size remaining constant, if the opening occupies a larger proportion, the oil ring 1 will occupy a smaller proportion, resulting in less oil storage; conversely, if the opening occupies a smaller proportion, the oil ring 1 will occupy a larger proportion, resulting in more oil storage. In this embodiment, the oil ring 1 can be set to occupy 60% to 90% of the entire circle to ensure the lubrication and cooling effect of the oil ring 1. Along the circumference of the oil ring 1, an oil spray groove 10 is formed on the oil ring 1. The oil spray groove 10 is used to store oil, and oil holes 15 are provided on the cavity wall of the oil spray groove 10. Oil is sprayed onto the working parts through the oil holes 15 to achieve cooling and lubrication of the working parts.

[0041] In this embodiment, the oil ring 1 is a non-circular ring, thus a single closed annular sealing ring is sufficient to seal the oil injection groove 10. Compared to existing technologies, this effectively reduces the number of sealing rings, simplifying the overall structure of the oil ring and facilitating its assembly. Simultaneously, using a single closed annular sealing ring to seal the oil injection groove 10 creates a continuous seal, reducing the failure rate of the sealing ring, improving its sealing effect, and giving the oil ring excellent sealing performance. This also helps save on oil ring consumables and control production costs. Furthermore, the non-circular design of the oil ring 1 allows for a smaller volume of the oil injection groove 10 compared to the circular structure in existing technologies, reducing the amount of oil required. This helps address situations where the oil cannot completely fill the oil injection groove 10 and where the oil holes 15 cannot stably spray oil, thereby improving the cooling and lubrication effect of the oil on the working parts. Additionally, the non-circular design of the oil ring 1 also helps reduce the overall weight of the oil ring, enabling a lightweight design for the drive motor.

[0042] Optionally, Figures 2 to 7Several cross-sectional views of the oil ring portion of the drive motor in this application embodiment are shown, cut radially along the oil ring. (Refer to...) Figures 2 to 7 In some embodiments of this application, a sealing groove 14 is provided on the oil ring 1 along the circumferential direction. The sealing groove 14 surrounds the periphery of the oil injection groove 10, and a sealing ring 2 is embedded in the sealing groove 14.

[0043] In this embodiment, a sealing groove 14 surrounds the periphery of the fuel injection groove 10, and a sealing ring 2 is embedded within the sealing groove 14. The sealing ring 2 can seal the periphery of the fuel injection groove 10, thereby preventing fuel leakage from the fuel injection groove 10. Simultaneously, after the sealing ring 2 seals the fuel injection groove 10, it ensures that the fuel is circulated within the fuel injection groove 10, reducing fuel waste and mitigating environmental pollution. The sealing ring 2 can be made of nitrile rubber, fluororubber, silicone, polyurethane rubber, etc., and its specific type is not limited in this embodiment.

[0044] The sealing ring 2 is embedded in the sealing groove 14. The sealing groove 14 can limit the sealing ring 2, thereby improving the installation stability of the sealing ring 2, reducing the probability of the sealing ring 2 coming off the oil ring 1, and helping to maintain the good sealing performance of the oil ring 1. In addition, the sealing groove 14 can be set as a closed annular structure to better fit the sealing ring 2 which has a closed annular structure, thereby improving the sealing effect on the oil injection groove 10.

[0045] Optionally, refer to Figures 1 to 7 In some embodiments of this application, the oil ring 1 includes an outer peripheral surface 11, a first end surface 12, and a second end surface 13. The outer peripheral surface 11 is arranged along the circumferential direction of the oil ring 1. The first end surface 12 is located on both sides of the outer peripheral surface 11 along the axial direction of the oil ring 1, and the second end surface 13 is located on both sides of the outer peripheral surface 11 along the circumferential direction of the oil ring 1. The first end surface 12 and the second end surface 13 are connected to each other to form the edge of the oil ring 1. A sealing groove 14 is provided on the outer peripheral surface 11, and / or the sealing groove 14 is provided on the first end surface 12 and the second end surface 13.

[0046] In this embodiment, the axial direction of the oil ring 1 is as follows: Figures 2 to 7As shown in the X direction, this direction is perpendicular to the circumferential direction of the oil ring 1. The oil ring 1 has an outer circumferential surface 11 arranged along its circumferential direction, and the outer circumferential surface 11 is a continuous surface; the oil ring 1 has a first end face 12 and a second end face 13 connected to each other. The first end face 12 is located on both sides of the outer circumferential surface 11 along the axial direction of the oil ring 1, that is, there are two first end faces 12, which are arranged opposite each other along the X direction. The second end face 13 is located on both sides of the outer circumferential surface 11 along the circumferential direction of the oil ring 1. Since the oil ring 1 is a non-circular ring structure, the oil ring 1 has an open end along its circumferential direction, which is the break point of the oil ring 1. It can be understood that there are also two second end faces 13, which extend along the axial direction of the oil ring 1 and are respectively connected to the two first end faces 12. The first end face 12 and the second end face 13 form the edge of the oil ring 1.

[0047] The sealing groove 14 is provided on the outer peripheral surface 11, and / or the sealing groove 14 is provided on the first end face 12 and the second end face 13, wherein, Figure 2 A cross-sectional schematic diagram of the sealing groove 14 provided on the outer peripheral surface 11 is shown. Figure 3 yes Figure 2 A magnified view of part A in the middle. Figure 4 yes Figure 2 A magnified view of part B in the middle. Figure 5 A cross-sectional schematic diagram is shown showing the sealing groove 14 disposed on the first end face 12 and the second end face 13. Figure 6 yes Figure 5 A magnified view of part C in the middle. Figure 7 yes Figure 5 A magnified view of part D in the middle. Figure 6 The sealing groove 14 is located on a second end face 13. Figure 7 The sealing groove 14 is located on another second end face 13.

[0048] In this embodiment, since the outer peripheral surface 11 is a surface arranged along the axial direction of the oil ring 1, if the sealing groove 14 is provided on the outer peripheral surface 11 of the oil ring 1 and the sealing ring 2 is embedded in the sealing groove 14, it is equivalent to achieving the sealing of the oil injection groove 10 through axial sealing. Since the first end face 12 and the second end face 13 are surfaces arranged radially along the oil ring 1, if the sealing groove 14 is provided on the first end face 12 and the second end face 13 of the oil ring 1 and the sealing ring 2 is embedded in the sealing groove 14, it is equivalent to achieving the sealing of the oil injection groove 10 through radial sealing. Thus, the sealing method of the oil injection groove 10 can be flexibly selected according to actual needs, improving the flexibility of the use of the oil ring 1 and making the installation and layout of the oil ring 1 easier.

[0049] Furthermore, if the sealing ring 2 is located on the outer circumferential surface 11 of the oil ring 1, the sealing ring 2 can be a sealing ring 2 with a cylindrical cross-section to facilitate the installation of the sealing ring 2; if the sealing ring 2 is located on the first end face 12 and the second end face 13 of the oil ring 1, the sealing ring 2 can be a sealing ring 2 with a strip cross-section to reduce the probability of the sealing ring 2 falling off.

[0050] Optionally, refer to Figures 2 to 7 In some embodiments of this application, the sealing groove 14 has a closed annular structure. In this case, the sealing ring 2 includes a circumferential sealing edge 21 and an axial sealing edge 22. The circumferential sealing edge 21 is arranged along the circumferential direction of the oil ring 1, and the axial sealing edge 22 is arranged along the axial direction of the oil ring 1. The two ends of the axial sealing edge 22 are connected to the two ends of the circumferential sealing edge 21, so that the circumferential sealing edge 21 and the axial sealing edge 22 form an annular structure. To facilitate the processing of the sealing ring 2, the sealing ring 2 can be a single piece, and the circumferential sealing edge 21 and the axial sealing edge 22 are essentially different parts of the sealing ring 2. Figure 3 and Figure 6 The figure shows a cross-sectional view of a circumferential sealing edge 21. Figure 4 and Figure 7 A cross-sectional view of an axial sealing edge 22 is shown in the figure.

[0051] Optionally, in some embodiments of this application, the circumferential sealing edge 21 can be configured as at least two parallel circumferential sealing edges 21, which are respectively connected to the axial sealing edge 22, thereby dividing the oil spray groove 10 on the oil ring 1 into multiple independent cavities to meet the cooling and lubrication requirements of different parts of the working component.

[0052] Optionally, in some embodiments of this application, the connection between the circumferential sealing edge 21 and the axial sealing edge 22 is an arc-shaped structure. That is, the circumferential sealing edge 21 and the axial sealing edge 22 are connected by an arc-shaped transition, which helps to improve the stress concentration phenomenon at the connection point and further improves the connection reliability between the circumferential sealing edge 21 and the axial sealing edge 22. At the same time, it also helps to avoid dead corner areas at the connection point, improves the corrosion of the sealing ring 2 during long-term use, and extends the service life of the sealing ring 2.

[0053] Optionally, refer to Figures 2 to 4 In some embodiments of this application, the oil ring 1 includes a first shaft end and a second shaft end, the outer diameter of the first shaft end is larger than the outer diameter of the second shaft end; the sealing groove 14 is provided on the outer peripheral surface 11, a portion of the sealing groove 14 is located at the first shaft end, and a portion of the sealing groove 14 is located at the second shaft end.

[0054] In this embodiment, the outer diameter of the first shaft end is larger than the outer diameter of the second shaft end, forming an oil ring 1 with different thicknesses at both ends. When the oil ring 1 is installed in the housing of the drive motor, the second shaft end contacts the housing first, that is, the end with the smaller outer diameter contacts the housing first. This helps to smoothly insert the oil ring 1 into the housing of the drive motor. Of course, to facilitate the smooth insertion of the oil ring 1 into the housing of the drive motor, an insertion hole with a gradually decreasing radial dimension can be provided on the housing of the drive motor, and the insertion hole is adapted to the shape and structure of the oil ring 1.

[0055] When the outer diameter of the first shaft end of the oil ring 1 is larger than the outer diameter of the second shaft end, the sealing groove 14 can be located on the outer peripheral surface 11 of the oil ring 1, or on the first end face 12 and the second end face 13 of the oil ring 1. If the sealing groove 14 is located on the outer peripheral surface 11 of the oil ring 1, part of the sealing groove 14 is located at the first shaft end and part is located at the second shaft end, resulting in different positions of different parts of the sealing groove 14. The sealing groove 14 located at the first shaft end is further away from the center of the oil ring 1, while the sealing groove 14 located at the second shaft end is closer to the center of the oil ring 1. This positional difference makes the surface of the sealing ring 2 embedded in the sealing groove 14 a frustum-shaped curved surface. If the sealing groove 14 is located on the first end face 12 and the second end face 13 of the oil ring 1, the position of the sealing groove 14 is not affected, and the surface of the sealing ring 2 embedded in the sealing groove 14 forms a cylindrical curved surface.

[0056] Optionally, refer to Figure 1 In some embodiments of this application, the oil injection groove 10 is provided with a plurality of oil holes 15, which are spaced apart along the circumferential direction of the oil ring 1, and at least some of the oil holes 15 are spaced apart by different distances. Specifically, taking the oil ring in the drive motor as an example, under normal circumstances, the heat generated in the circumferential direction of the stator winding 4 is not uniform during the operation of the motor. Therefore, the distribution of the plurality of oil rings on the cavity wall in this embodiment is also uneven. In the part of the stator winding 4 where the heat generation is large, more oil holes 15 can be opened on the corresponding cavity wall. For example, the distance between two adjacent oil holes 15 can be reduced so that the number of oil holes 15 increases for a given area size, thereby increasing the amount of oil injected and achieving a better cooling and heat dissipation effect. In the part of the stator winding 4 where the heat generation is small, fewer oil holes 15 can be opened on the corresponding cavity wall. For example, the distance between two adjacent oil holes 15 can be increased so that the number of oil holes 15 is relatively small for a given area size, thereby reducing the amount of oil injected and avoiding oil waste while ensuring the cooling and lubrication effect.

[0057] Reference Figures 1 to 7This application also provides a drive motor, which includes an oil ring 1 from any of the foregoing embodiments. The oil ring 1 is a non-enclosed circular structure, allowing for flexible adjustment of the volume of the oil injection groove 10 and the angle of the oil ring distribution. Furthermore, the oil ring is easy to assemble, facilitating the assembly of the drive motor and controlling its manufacturing cost. In addition, the oil ring possesses good sealing performance and excellent cooling and lubrication effects, helping to maintain the normal operation of the drive motor. Moreover, the overall weight of the oil ring is lighter, further contributing to the lightweight design of the drive motor.

[0058] Optionally, in some embodiments of this application, the drive motor further includes a housing 3, a stator assembly, and a rotor assembly; the stator assembly is disposed within the housing 3, and the rotor assembly is disposed within the stator assembly and rotates relative to the stator assembly under the action of electromagnetic induction; the stator assembly includes a stator winding 4 and a stator core 5, the stator core 5 is sleeved on at least a portion of the outer peripheral surface of the stator winding 4, and an oil ring 1 is sleeved on the outer peripheral surface of the stator winding 4; along the axial direction of the oil ring 1, one side of the oil ring 1 abuts against the stator core 5, and the other side abuts against the end of the housing 3.

[0059] In this embodiment, both the stator assembly and the rotor assembly are housed within the housing 3. The stator assembly is fixedly connected to the housing 3, and the rotor assembly is housed within the stator assembly. Based on the principle of electromagnetic induction, the stator assembly generates a rotating magnetic field when energized. This rotating magnetic field drives the rotor assembly to rotate relative to the stator assembly. The rotor assembly is connected to the output shaft of the motor, causing the output shaft to rotate synchronously, thereby converting electrical energy into mechanical energy for output.

[0060] The stator assembly includes a stator core 5 and a stator winding 4. The stator core 5 is typically made of laminated silicon steel sheets and is fitted onto at least a portion of the outer circumference of the stator winding 4. The stator winding 4 is made of insulated wire wound in a specific shape. Depending on the type of motor and requirements, the stator winding 4 can adopt different shapes and mounting methods. The rotor assembly includes a rotor core, rotor windings, and a shaft. The rotor core can also be made of laminated silicon steel sheets. The rotor windings adopt different winding methods depending on the type of motor, such as squirrel-cage type or wire-wound type. The shaft can be made of steel or alloy materials and is fixedly connected to the motor output shaft for support and torque transmission.

[0061] Oil ring 1 is sleeved on the outer circumferential surface of stator winding 4, along the axial direction of oil ring 1, that is, along... Figures 2 to 7 In the X direction, one side of the oil ring 1 abuts against the stator core 5, and the other side abuts against the end of the housing 3, thereby achieving axial positioning of the oil ring 1 and reliably fixing it inside the housing 3. The circumferential position of the oil ring 11 and the stator winding 4 can also be flexibly adjusted according to cooling and lubrication requirements, thus adapting to various cooling and lubrication spray flow rates and angle requirements, and improving the cooling and lubrication effect.

[0062] Optionally, Figure 8 This paper shows a schematic diagram of the end of a housing 3 according to an embodiment of the present application. Figure 9 This illustration shows a schematic diagram of an embodiment of the present application in which an oil ring 1 is installed at one end of a housing 3. (Refer to...) Figure 8 and Figure 9 In some embodiments of this application, the end of the housing 3 is a cylindrical structure, and a limiting member 31 is provided on the inner wall of the cylindrical structure. The limiting member 31 extends in the direction toward the center of the cylindrical structure and abuts against the second end face 13 of the oil ring 1 to restrict the movement of the oil ring 1 in its circumferential direction, thereby improving the installation reliability of the oil ring 1. The limiting member 31 can be a block-shaped protrusion, which has a simple structure, is easy to process, and can abut against the end face of the oil ring 1 to play an effective limiting role.

[0063] Optionally, in some embodiments of this application, the limiting member 31 and the housing 3 are integrally formed, eliminating the subsequent connection process between the limiting member 31 and the housing 3, while ensuring the reliability of the connection between the limiting member 31 and the housing 3, and guaranteeing an effective limiting effect. Alternatively, there are two limiting members 31, which are spaced apart circumferentially along the cylindrical structure. One limiting member 31 abuts against one second end face 13 of the oil ring 1, and the other limiting member 31 abuts against the other second end face 13 of the oil ring 1. The two limiting members 31 can achieve a more reliable effect and effectively prevent the oil ring 1 from rotating circumferentially. Alternatively, the limiting member 31 is a hollow structure to reduce its weight, thereby facilitating the lightweight design of the drive motor.

[0064] This application also provides an electric drive system, including the drive motor of any of the foregoing embodiments. An electric drive system is a device that converts electrical energy into mechanical energy, including a drive motor, a motor controller, a transmission mechanism (such as a gearbox, reducer, etc.), a power supply, etc., and its performance directly determines the energy consumption and driving performance of an electric vehicle. Using the aforementioned drive motor in the electric drive system helps maintain the normal operation of the electric drive system, control the manufacturing cost of the electric drive system, and improve the safety performance of the electric drive system.

[0065] This application also provides a vehicle, including the oil ring 1 of any of the foregoing embodiments or the drive motor of any of the foregoing embodiments, wherein the vehicle is an electric vehicle. Using the oil ring 1 of any of the foregoing embodiments or the drive motor of any of the foregoing embodiments helps to control the manufacturing cost of the vehicle and improve the safety performance of the vehicle.

[0066] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or terminal device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or terminal device. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or terminal device that includes said element.

[0067] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An oil ring (1) applied to a drive motor, characterized in that, The oil ring (1) is a non-circular oil ring (1), and an oil spray groove (10) is provided on the oil ring (1) along the circumferential direction.

2. The oil ring (1) according to claim 1, characterized in that, Along the circumferential direction of the oil ring (1), a sealing groove (14) is provided on the oil ring (1), the sealing groove (14) surrounds the periphery of the oil injection groove (10), and a sealing ring (2) is embedded in the sealing groove (14).

3. The oil ring (1) according to claim 2, characterized in that, The oil ring (1) includes an outer peripheral surface (11), a first end surface (12), and a second end surface (13); The outer peripheral surface (11) is arranged along the circumferential direction of the oil ring (1), the first end face (12) is located on both sides of the outer peripheral surface (11) along the axial direction of the oil ring (1), the second end face (13) is located on both sides of the outer peripheral surface (11) along the circumferential direction of the oil ring (1), and the first end face (12) and the second end face (13) are connected to each other to form the edge of the oil ring (1); The sealing groove (14) is provided on the outer peripheral surface (11), and / or the sealing groove (14) is provided on the first end face (12) and the second end face (13).

4. The oil ring (1) according to claim 2 or 3, characterized in that, The sealing groove (14) has a closed ring structure.

5. The oil ring (1) according to claim 3, characterized in that, The oil ring (1) includes a first shaft end and a second shaft end, wherein the outer diameter of the first shaft end is larger than the outer diameter of the second shaft end; The sealing groove (14) is provided on the outer peripheral surface (11), with a portion of the sealing groove (14) located at the first shaft end and a portion of the sealing groove (14) located at the second shaft end.

6. The oil ring (1) according to claim 1, characterized in that, The oil injection groove (10) is provided with a plurality of oil holes (15), which are spaced apart along the circumferential direction of the oil ring (1), and at least some of the oil holes (15) are spaced apart from each other.

7. A drive motor, characterized in that, Includes the oil ring (1) as described in any one of claims 1 to 6.

8. The drive motor according to claim 7, characterized in that, It also includes the housing (3), stator assembly and rotor assembly; The stator assembly is disposed inside the housing (3), and the rotor assembly is disposed inside the stator assembly and rotates relative to the stator assembly under the action of electromagnetic induction; The stator assembly includes a stator winding (4) and a stator core (5), the stator core (5) being sleeved on at least a portion of the outer peripheral surface (11) of the stator winding (4), and the oil ring (1) being sleeved on the outer peripheral surface (11) of the stator winding (4). Along the axial direction of the oil ring (1), one side of the oil ring (1) abuts against the stator core (5), and the other side abuts against the end of the housing (3).

9. The drive motor according to claim 8, characterized in that, The end of the housing (3) is a cylindrical structure, and a limiting member (31) is provided on the inner wall of the cylindrical structure. The limiting member (31) extends in the direction toward the center of the cylindrical structure and abuts against the end face of the oil ring (1) to restrict the movement of the oil ring (1) along its circumference.

10. The drive motor according to claim 9, characterized in that, The limiting member (31) and the housing (3) are an integral part; And / or, there are two limiting members (31), and the two limiting members (31) are arranged circumferentially along the cylindrical structure; And / or, the limiting member (31) is a hollow structure.

11. An electric drive system, characterized in that, Includes the drive motor as described in any one of claims 7 to 10.

12. A vehicle, characterized in that, It includes the oil ring (1) according to any one of claims 1 to 6, the drive motor according to any one of claims 7 to 10, or the electric drive system according to claim 11.

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