Oil injection ring assembly, motor and vehicle

Abstract

This application relates to the field of vehicle technology, and more particularly to a fuel injection ring assembly, a motor, and a vehicle. This application provides a fuel injection ring assembly, including a fuel injection ring, a first seal, and a second seal. The fuel injection ring is disposed on one axial side of the stator core and coaxially arranged with the stator core. The fuel injection ring has a first oil passage and a fuel injection hole. Along the axial direction of the fuel injection ring, the first oil passage extends from the side of the fuel injection ring closest to the stator core toward the side furthest from the stator core. The fuel injection hole penetrates the inner peripheral wall of the fuel injection ring and communicates with the first oil passage. Along the axial direction of the fuel injection ring, both the first seal and the second seal are disposed on the side of the fuel injection ring facing the stator core. Along the radial direction of the fuel injection ring, the first seal and the second seal are respectively disposed on both sides of the first oil passage, forming a second oil passage between the first seal and the second seal. The second oil passage communicates with the internal flow channel of the stator core and the first oil passage. This can reduce the axial dimension of the motor housing, facilitating the overall arrangement of the electric drive assembly.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, and in particular to an injection ring assembly, a motor, and a vehicle. Background Technology

[0002] Motors generate a lot of heat during operation, which can lead to excessively high motor temperatures. To reduce motor failures, cooling is necessary. Currently, the cooling oil passages on the oil injection ring are formed by the oil injection ring and the motor housing. Axial and radial seals are located at both ends of the cooling passages, resulting in a large axial dimension of the motor housing. Utility Model Content

[0003] This application provides an injection ring assembly, a motor, and a vehicle, which can reduce the axial dimension of the motor housing and facilitate the overall arrangement of the electric drive assembly.

[0004] To achieve the above objectives, the main technical solutions adopted in this application include: In a first aspect, this application provides an oil injection ring assembly for cooling stator windings. The oil injection ring assembly includes an oil injection ring, a first seal, and a second seal. The oil injection ring is disposed on one axial side of the stator core and coaxially arranged with the stator core. The oil injection ring has a first oil passage and an oil injection hole. Along the axial direction of the oil injection ring, the first oil passage extends from the side of the oil injection ring near the stator core toward the side away from the stator core. The oil injection hole penetrates the inner peripheral wall of the oil injection ring and communicates with the first oil passage. Along the axial direction of the oil injection ring, the first seal and the second seal are both disposed on the side of the oil injection ring facing the stator core. Along the radial direction of the oil injection ring, the first seal and the second seal are respectively disposed on both sides of the first oil passage. A second oil passage is formed between the first seal and the second seal. The second oil passage communicates the inner flow channel of the stator core and the first oil passage, thereby reducing the axial dimension of the motor housing and facilitating the structural arrangement of the electric drive assembly.

[0005] Optionally, the radial outer peripheral wall of the oil injection ring is provided with a first groove, and the first seal is disposed in the first groove. The first seal is adapted to abut against the motor housing surrounding the radial outer side of the stator core. The axial dimension of the motor housing only needs to cover the first seal, thereby freeing up the axial dimension of the motor housing.

[0006] Optionally, the oil injection ring has a plurality of mounting ears on its radial outer peripheral wall. The plurality of mounting ears are spaced apart along the circumference of the oil injection ring. The mounting ears are connected to the motor housing, so that the compression variation range of the first seal and the second seal is small, thereby improving the sealing stability between the oil injection ring and the stator core and the motor housing.

[0007] Optionally, along the axial direction of the oil injection ring, a second groove is provided on the side of the oil injection ring facing the stator core. The second groove extends from the side of the oil injection ring close to the stator core toward the side away from the stator core. A second seal is disposed in the second groove and is adapted to abut against the stator core to improve the sealing stability between the oil injection ring and the stator core.

[0008] Optionally, the oil injection ring includes a main body and a protrusion. The first oil passage and the oil injection hole are both located in the main body. The first seal is located in the main body and is located on the radially outer side of the first oil passage. The protrusion is located on the radially inner side of the main body and forms the second groove with the radially inner peripheral wall of the main body. This can reduce the amount of material used in the main body on the side away from the stator core.

[0009] Optionally, along the radial direction of the oil injection ring, the projection of the oil injection hole falls within the projection of the stator winding, so that the cooling oil sprayed from the oil injection hole can be directly sprayed onto the stator winding to cool it down, thereby improving the heat dissipation efficiency of the stator winding.

[0010] Optionally, along the axial direction of the oil injection ring, the oil injection hole is located on the side of the first oil passage away from the stator core, which can make the oil injection hole closer to the axial center of the part of the stator winding that extends out of the stator core, thereby improving the cooling effect of the stator winding.

[0011] Optionally, there are multiple oil injection holes arranged at intervals along the circumference of the oil injection ring. These multiple injection holes simultaneously spray oil onto the stator windings for cooling, thereby improving the heat dissipation efficiency of the stator windings.

[0012] Secondly, this application provides an electric motor including the fuel injection ring assembly described in any of the above embodiments. The electric motor in this application has the beneficial effects of the fuel injection ring assembly in any of the embodiments of this application.

[0013] Thirdly, this application provides a vehicle including the fuel injection ring assembly described in any of the above embodiments or the motor described in the above embodiments. The vehicle of this application has the beneficial effects of the motor of this application and the beneficial effects of the fuel injection ring assembly in any of the embodiments of this application.

[0014] This application has at least the following beneficial effects: The oil injection ring assembly in this application has the first oil passage located inside the oil injection ring, and the first seal and the second seal are located on the same side of the oil injection ring, so that the arrangement of the first oil passage of the oil injection ring does not depend on the motor housing, and the arrangement of the first seal and the second seal is less dependent on the axial dimension of the motor housing. The motor housing does not need to cover the entire axial dimension of the oil injection ring along its axial direction, thereby reducing the axial dimension of the motor housing and facilitating the structural arrangement of the electric drive assembly. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a partial cross-sectional view of a motor in one embodiment of this application; Figure 2 This is a schematic diagram of the structure of the fuel injection ring assembly in one embodiment of this application; Figure 3 for Figure 1 A magnified view of region E in the middle.

[0017] [Explanation of Labels in the Attached Image] 100. Stator winding; 200. Stator core; 201. Flow channel; 300. Motor housing; 1. Injection ring; 11. First oil passage; 12. Injection hole; 13. First groove; 14. Mounting ear; 15. Second groove; 16. Main body; 17. Protrusion; 2. First sealing element; 3. Second sealing element; 4. Second oil passage; X, axial direction of the fuel injection ring; Y, radial direction of the fuel injection ring. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, 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.

[0019] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0020] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0021] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the term "connection" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. The term "multiple" in this application refers to two or more (including two).

[0022] Currently, in the electric drive systems of hybrid vehicles, the fuel injection ring assembly typically consists of a fuel injection ring, radial O-rings, and axial seals. The fuel injection ring assembly, together with the motor housing and stator core, forms a sealed oil cavity. Pressurized oil flowing from the motor housing or stator core is sprayed onto the stator winding surface through oil holes arranged circumferentially on the fuel injection ring, thereby reducing the temperature of the stator windings. Because the radial O-rings and axial seals are located on opposite sides of the injection holes, the axial dimension of the fuel injection ring is relatively long. Furthermore, since the fuel injection ring assembly needs to cooperate with the motor housing to form a sealed oil cavity, the axial dimension of the motor housing must be larger than the axial dimension of the fuel injection ring, increasing the axial dimension of the motor housing and hindering the overall layout of the electric drive assembly.

[0023] In addition, the oil injection ring needs to be restricted in its axial position by other housing structures to ensure the compression of the axial seal ring. However, the dimensional chain of the axial seal ring compression is determined by four products: the stator core, the motor housing, other housings, and the oil injection ring. The dimensional chain is long, resulting in a large range of variation in the compression of the axial seal ring.

[0024] In view of this, this application proposes an oil injection ring assembly that can release the axial dimension of the motor housing, which is beneficial to the structural layout of the electric drive assembly. Furthermore, the compression of the axial seal ring is only related to the stator core, the motor housing, and the oil injection ring. The compression of the axial seal ring varies within a small range, which can better ensure the sealing of the oil injection ring assembly.

[0025] The vehicle in this application includes an electric drive assembly, which includes a motor, a motor controller, and a reducer. The motor includes a fuel injection ring assembly. (See reference...) Figure 1The motor includes a motor housing 300, a stator core 200, a stator winding 100, and an oil injection ring assembly. The stator winding 100 is wound around the stator core 200. The motor housing 300 is located on the outer periphery of the stator core 200 along the axial direction of the stator core 200. The oil injection ring 1 is located on one side of the stator core 200 and is coaxially arranged with the stator core to spray oil to cool the stator winding 100.

[0026] refer to Figure 2 and Figure 3 The oil injection ring assembly in this application includes an oil injection ring 1, a first seal 2, and a second seal 3. The oil injection ring 1 is located on one axial side of the stator core 200 and is coaxially arranged with the stator core 200. The oil injection ring 1 has a first oil passage 11 and an oil injection hole 12. Along the axial direction X of the oil injection ring 1, the first oil passage 11 extends from the side of the oil injection ring 1 close to the stator core 200 toward the side away from the stator core 200. The oil injection hole 12 penetrates the inner peripheral wall of the oil injection ring 1 and communicates with the first oil passage 11. Along the axial direction X of the oil injection ring 1, the first seal 2 and the second seal 3 are both located on the side of the oil injection ring 1 facing the stator core 200. Along the radial direction Y of the oil injection ring 1, the first seal 2 and the second seal 3 are respectively located on both sides of the first oil passage 11. A second oil passage 4 is formed between the first seal 2 and the second seal 3. The second oil passage 4 communicates the inner flow channel 201 of the stator core 200 and the first oil passage 11.

[0027] The stator core 200 is provided with a flow channel 201 for cooling oil to circulate. The opening of the first oil channel 11 faces the stator core 200 and extends away from the stator core 200. For example, the first oil channel 11 has an annular structure. Along the radial direction Y of the oil injection ring 1, the first seal 2 and the second seal 3 seal both sides of the first oil channel 11, forming a second oil channel that guides the cooling oil of the stator core 200 to the first oil channel 11, reducing the leakage of cooling oil flowing out of the stator core 200. The cooling oil flows from the flow channel 201 of the stator core 200 into the second oil channel 4, and then enters the first oil channel 11 from the second oil channel 4. The cooling oil in the first flow channel 201 is sprayed out from the oil injection hole 12 to cool the stator winding 100.

[0028] In this application, the first seal 2 and the second seal 3 are located on the same side of the oil injection ring 1 to directly guide the cooling oil in the stator core 200 into the first oil passage 11, thereby reducing the leakage of cooling oil. The first seal 2 and the second seal 3 can both seal against the stator core 200; alternatively, one of them located radially inside the oil injection ring 1 seals against the stator core 200, while the other located radially outside the oil injection ring 1 abuts against the motor housing 300. In this case, along the axial direction X of the oil injection ring 1, at least a portion of the oil injection ring 1 is located radially inside the motor housing 300. Since the first oil passage 11 is located inside the injection ring 1 in this application, and the first seal 2 and the second seal 3 are located on the same side of the injection ring 1, the arrangement of the first oil passage 11 of the injection ring 1 in this application does not depend on the motor housing 300, and the arrangement of the first seal 2 and the second seal 3 has little dependence on the axial dimension of the motor housing 300. The motor housing 300 does not need to cover the entire axial X dimension of the injection ring 1 along its axial direction, thereby reducing the axial dimension of the motor housing 300 and facilitating the structural arrangement of the electric drive assembly.

[0029] Optionally, refer to Figure 3 The outer radial wall of the oil injection ring 1 has a first groove 13, and a first seal 2 is disposed in the first groove 13. The first seal 2 is adapted to abut against the motor housing 300 surrounding the radial outer side of the stator core 200. The first groove 13 is disposed on the outer radial wall of the oil injection ring 1 and extends toward the inner radial wall of the oil injection ring 1. The first seal 2 is disposed in the first groove 13 along the radial direction Y of the oil injection ring 1. One side of the first seal 2 abuts against the bottom wall of the first groove 13, and the other side of the first seal 2 abuts against the motor housing 300, thereby achieving a seal between the stator core 200, the oil injection ring 1, and the motor housing 300. At this time, the second oil passage 4 is formed by the stator core 200, the oil injection ring 1, and the motor housing 300.

[0030] In addition, the first groove 13 can position the first seal 2 and reduce the positional offset of the first seal 2, thereby improving the sealing stability between the oil injection ring 1 and the motor housing 300 and reducing the leakage of cooling oil.

[0031] It should be understood that, since the first seal 2 is used to reduce leakage of cooling oil from between the motor housing 300 and the oil injection ring 1, the axial dimension of the motor housing 300 only needs to cover the first seal 2, thereby freeing up the axial dimension of the motor housing 300, which facilitates the structural layout of the electric drive assembly, saves the space occupied by the motor, and thus saves the space occupied by the electric drive assembly.

[0032] Optionally, refer to Figure 1 and Figure 2 The outer radial wall of the oil injection ring 1 is provided with multiple mounting ears 14. The multiple mounting ears 14 are spaced apart along the circumference of the oil injection ring 1, and the mounting ears 14 are connected to the motor housing 300.

[0033] Multiple mounting ears 14 protrude from the radial outer peripheral wall of the oil injection ring 1. The oil injection ring 1 is fixed to the motor housing 300 by fasteners passing through the mounting ears 14. Along the axial direction X of the oil injection ring 1, the oil injection ring 1 presses against the second seal 3 and compresses it, sealing the second seal 3 between the oil injection ring 1 and the stator core 200. Along the radial direction Y of the oil injection ring 1, the oil injection ring 1 presses against the first seal 2 and compresses it, sealing the first seal 2 between the oil injection ring 1 and the motor housing 300. The compression amount of the first seal 2 and the second seal 3 in this application is related to the oil injection ring 1 being fixed to the motor housing 300. The compression amount of the first seal 2 and the second seal 3 varies within a small range, which improves the sealing stability between the oil injection ring 1 and the stator core 200 and the motor housing 300.

[0034] It should be understood that the mounting ear 14 in this application is located on the side of the first groove 13 away from the stator core 200. The mounting ear 14 can be attached to the first groove 13 and attached to the axial end face of the motor housing 300, thereby further reducing the axial dimension of the motor housing 300.

[0035] Optionally, refer to Figure 3 Along the axial direction X of the oil injection ring 1, the oil injection ring 1 is provided with a second groove 15 on the side facing the stator core 200. The second groove 15 extends from the side of the oil injection ring 1 close to the stator core 200 toward the side away from the stator core 200. The second seal 3 is provided in the second groove 15 and is adapted to abut against the stator core 200.

[0036] The second seal 3 is located in the second groove 15. The second groove 15 can position the second seal 3 and reduce the positional offset of the second seal 3, thereby improving the sealing stability between the oil injection ring 1 and the stator core 200 and reducing the leakage of cooling oil.

[0037] Optionally, refer to Figure 3 The oil injection ring 1 includes a main body 16 and a protrusion 17. The first oil passage 11 and the oil injection hole 12 are both provided in the main body 16. The first seal 2 is provided in the main body 16 and is located on the radial outer side of the first oil passage 11. The protrusion 17 is provided on the radial inner side of the main body 16 and forms a second groove 15 with the radial inner peripheral wall of the main body 16.

[0038] By adding a protrusion 17 to the side of the main body 16 facing the stator core 200, the second groove 15 is provided to satisfy the setting of the second seal 3, and the amount of material used on the side of the main body 16 away from the stator core 200 can be reduced, thereby reducing costs.

[0039] Optionally, along the radial direction Y of the oil injection ring 1, the projection of the oil injection hole 12 falls into the projection of the stator winding 100, so that the opening of the oil injection hole 12 is directly facing the stator winding 100, thereby allowing the cooling oil sprayed from the oil injection hole 12 to be directly sprayed onto the stator winding 100 to cool the stator winding 100 and improve the heat dissipation efficiency of the stator winding 100.

[0040] Optionally, along the axial direction X of the oil injection ring 1, the oil injection hole 12 is located on the side of the first oil passage 11 away from the stator core 200.

[0041] Since the stator winding 100 passes through the radial inner side of the stator core 200 and extends out of the stator core 200, and the oil injection hole 12 is located on the side of the first oil passage 11 away from the stator core 200, the oil injection hole 12 can be closer to the axial center of the part of the stator winding 100 that extends out of the stator core 200, thereby improving the cooling effect of the stator winding 100.

[0042] Optionally, refer to Figure 2 There are multiple oil injection holes 12, which are spaced apart along the circumference of the oil injection ring 1. The multiple oil injection holes 12 simultaneously spray oil to cool the stator winding 100, thereby improving the heat dissipation efficiency of the stator winding 100.

[0043] The motor in this application has the beneficial effects of the fuel injection ring assembly in any embodiment of this application, and the vehicle in this application has the beneficial effects of the motor in this application and the fuel injection ring assembly in any embodiment of this application.

[0044] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. An oil injection ring assembly for cooling a stator winding (100), characterized in that, include: An oil injection ring (1) is disposed on one axial side of the stator core (200) and coaxially arranged with the stator core (200). The oil injection ring (1) has a first oil passage (11) and an oil injection hole (12). Along the axial direction (X) of the oil injection ring (1), the first oil passage (11) extends from the side of the oil injection ring (1) close to the stator core (200) toward the side away from the stator core (200). The oil injection hole (12) penetrates the inner peripheral wall of the oil injection ring (1) and communicates with the first oil passage (11). The first seal (2) and the second seal (3) are located along the axial direction (X) of the oil injection ring (1). The first seal (2) and the second seal (3) are both located on the side of the oil injection ring (1) facing the stator core (200). Along the radial direction (Y) of the oil injection ring (1), the first seal (2) and the second seal (3) are respectively located on both sides of the first oil passage (11). A second oil passage is formed between the first seal (2) and the second seal (3). The second oil passage connects the inner flow channel (201) of the stator core (200) and the first oil passage (11).

2. The fuel injection ring assembly according to claim 1, characterized in that, The outer radial (Y) peripheral wall of the oil injection ring (1) is provided with a first groove (13), and the first seal (2) is provided in the first groove (13). The first seal (2) is adapted to abut against the motor housing (300) surrounding the radial outer side of the stator core (200).

3. The fuel injection ring assembly according to claim 2, characterized in that, The oil injection ring (1) has a plurality of mounting ears (14) on its radial outer peripheral wall. The plurality of mounting ears (14) are spaced apart along the circumference of the oil injection ring (1). The mounting ears (14) are connected to the motor housing (300).

4. The fuel injection ring assembly according to claim 1, characterized in that, Along the axial direction (X) of the oil injection ring (1), the oil injection ring (1) is provided with a second groove (15) on the side facing the stator core (200). The second groove (15) extends from the side of the oil injection ring (1) close to the stator core (200) toward the side away from the stator core (200). The second seal (3) is provided in the second groove (15) and is adapted to abut against the stator core (200).

5. The fuel injection ring assembly according to claim 4, characterized in that, The oil injection ring (1) includes a main body (16) and a protrusion (17). The first oil passage (11) and the oil injection hole (12) are both located on the main body (16). The first sealing member (2) is located on the main body (16) and is located on the radial outer side of the first oil passage (11). The protrusion (17) is located on the radial inner side of the main body (16) and forms the second groove (15) with the radial inner peripheral wall of the main body (16).

6. The fuel injection ring assembly according to claim 1, characterized in that, Along the radial direction (Y) of the oil injection ring (1), the projection of the oil injection hole (12) falls within the projection of the stator winding (100).

7. The fuel injection ring assembly according to claim 6, characterized in that, Along the axial direction (X) of the oil injection ring (1), the oil injection hole (12) is located on the side of the first oil passage (11) away from the stator core (200).

8. The fuel injection ring assembly according to claim 1, characterized in that, There are multiple oil injection holes (12), which are spaced apart along the circumference of the oil injection ring (1).

9. An electric motor, characterized in that, Includes the fuel injection ring assembly according to any one of claims 1 to 8.

10. A vehicle, characterized in that, Includes the fuel injection ring assembly according to any one of claims 1 to 8 or the motor according to claim 9.

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