Oil collecting ring, motor, electric assembly and vehicle

Abstract

The invention provides an oil collecting ring, a motor, an electric assembly and a vehicle. Wherein the oil collecting ring is provided with a first cavity and a second cavity which are axially arranged at an interval, the oil collecting ring comprises a partition plate for separating the first cavity and the second cavity, and the partition plate is provided with a communicating opening for communicating the first cavity and the second cavity; the oil collecting ring is provided with an inlet communicated with the second cavity, an opening is formed in the end, away from the second cavity, of the first cavity, and a winding of the motor penetrates through the opening and extends into the first cavity. According to the invention, the cooling oil in the second cavity enters the first cavity through the communication port to cool the part of the winding extending into the first cavity and the axial end part of the stator core. According to the oil collecting ring, the first cavity and the second cavity are double-layer cavities arranged in the axial direction of the oil collecting ring, the radial space of the first cavity is only limited by the size of the inner space of the shell, and therefore the oil collecting ring can be suitable for the application environment of a multi-layer winding.

Description

Technical Field

[0001] The present application relates to the technical field of motor cooling, and in particular to an oil collecting ring, a motor, an electric assembly and a vehicle. Background Art

[0002] The oil collecting hood usually adopts a radial double-layer structure, that is, it has two chambers in the radial direction. The outer chamber is connected to the stator oil channel. The inner wall of the outer chamber is provided with radial spray holes, which facilitate the cooling oil to enter the inner chamber from the spray holes to cool the winding ends extending into the inner chamber, and connect to the oil channel in the stator core to evenly cool the entire stator assembly. In the same installation space, the radial arrangement of the two chambers will limit the radial space of the inner chamber, which is not suitable for multi-layer windings. Summary of the invention

[0003] The present application provides an oil collecting ring, a motor, an electric assembly and a vehicle suitable for cooling a multi-layer winding structure.

[0004] In a first aspect, an embodiment of the present application provides an oil collecting ring, which has a first cavity and a second cavity axially spaced apart, and the oil collecting ring includes a partition separating the first cavity and the second cavity, and the partition is provided with a connecting port connecting the first cavity and the second cavity and used to introduce the cooling medium in the second cavity into the first cavity; the first cavity is used to accommodate the winding of the motor.

[0005] According to the first aspect, in a possible implementation, the oil collecting ring includes a first inner ring portion and a first outer ring portion, the first outer ring portion is arranged radially outside the first inner ring portion, and one axial end of the first inner ring portion and one axial end of the first outer ring portion are both connected to the partition; the first cavity is surrounded by the first inner ring portion, the first outer ring portion and the partition, and an opening for the winding of the power supply machine to penetrate into the first cavity is formed between the other axial end of the first inner ring portion and the other axial end of the first outer ring portion.

[0006] According to the first aspect, in a possible implementation, the oil collecting ring includes an end plate and a second inner ring portion, the end plate and the partition are arranged at an axial interval along the oil collecting ring, the second inner ring portion is connected between the end plate and the partition, the second cavity is surrounded by the end plate, the partition and the second inner ring portion, and an inlet connected to the second cavity is formed between the radial outer side of the end plate and the radial outer side of the partition.

[0007] According to the first aspect, in a possible implementation, the oil collecting ring includes an end plate, a second inner ring portion and a second outer ring portion, and the end plate and the partition are arranged at an axial interval along the oil collecting ring; the second inner ring portion and the second outer ring portion are both connected between the end plate and the partition, the second cavity is surrounded by the end plate, the second inner ring portion, the second outer ring portion and the partition, and the second outer ring portion is arranged on the radial outside of the second inner ring portion, and the second outer ring portion is provided with an inlet connected to the second cavity.

[0008] According to the first aspect, in a possible implementation manner, a diameter of the first outer ring portion is smaller than an outer diameter of the end plate.

[0009] According to the first aspect, in a possible implementation, an oil passage extending along the axial direction of the oil collecting ring is formed on the side of the first outer ring portion facing away from the first inner ring portion, and the oil passage is connected to the second cavity, and one end of the oil passage forms an inlet connected to the second cavity.

[0010] According to the first aspect, in a possible implementation manner, the first inner ring portion is provided with an outlet communicating with the first cavity.

[0011] According to the first aspect, in a possible implementation, the partition includes a first ring portion and a second ring portion, the outer edge of the first ring portion is connected to the second inner ring portion, the inner edge of the first ring portion is connected to the first inner ring portion, and the first ring portion is provided with an outlet connected to the first cavity; the outer edge of the second ring portion is connected to the second outer ring portion, and the inner edge of the second ring portion is connected to the second inner ring portion.

[0012] According to the first aspect, in a possible implementation, on a cross section perpendicular to the center axis of the oil collecting ring, the first outer ring portion is annular, or the first outer ring portion includes at least two arc segments connected end to end and having different diameters.

[0013] According to the first aspect, in a possible implementation, on a cross section perpendicular to the center axis of the oil collecting ring, the second outer ring portion is annular, or the second outer ring portion includes at least two arc segments connected end to end and having different diameters.

[0014] According to the first aspect, in a possible implementation, the oil collecting ring also includes a connecting piece, which has a hollow channel for the lead wire on the winding to pass through; the connecting piece is connected to the end plate, the hollow channel is connected to the second cavity, and a wire hole corresponding to the hollow channel is opened on the partition.

[0015] According to the first aspect, in a possible implementation, the oil collecting ring also includes a connector having a hollow channel for the lead wire on the winding to pass through; the connector passes through the end plate and is connected to the partition, and the hollow channel is connected to the first cavity.

[0016] According to the first aspect, in a possible implementation, the oil collecting ring further includes a connector having a hollow channel for a lead wire on the winding to pass through; the connector is connected to the first outer ring portion, and the hollow channel is connected to the first cavity.

[0017] In a second aspect, an embodiment of the present application further provides a motor, comprising a stator core and at least one oil collecting ring as described in the first aspect.

[0018] In a third aspect, an embodiment of the present application further provides an electric assembly, which includes the motor according to the second aspect.

[0019] In a fourth aspect, an embodiment of the present application further provides a vehicle, the vehicle comprising the motor described in the second aspect or the electric assembly described in the third aspect.

[0020] In the oil collecting ring, motor, electric assembly and vehicle provided by the present application, the interior of the oil collecting ring is separated by a partition into a first cavity and a second cavity spaced axially along the oil collecting ring, and a connecting port connecting the first cavity and the second cavity is opened on the partition. The cooling oil in the second cavity enters the first cavity through the connecting port to cool the part of the winding extending into the first cavity and the axial end of the stator core. Since in the present application, the first cavity and the second cavity are double-layer cavities arranged along the axial direction of the oil collecting ring, the radial space of the first cavity is only limited by the size of the internal space of the shell, so that it can be suitable for the application environment of multi-layer windings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 is a schematic diagram of the flow path of cooling oil in a motor according to an embodiment of the present application;

[0023] Figure 2 is a schematic diagram of the flow path of cooling oil in a motor according to another embodiment of the present application;

[0024] Figure 3This is a structural schematic diagram of an oil collecting ring in an example of the present application;

[0025] Figure 4 is a structural schematic diagram of an oil collecting ring in another example of the present application;

[0026] Figure 5 This is a structural schematic diagram of an oil collecting ring in another example of the present application;

[0027] Figure 6 It is a schematic structural diagram of the outer ring portion of an embodiment of the present application;

[0028] Figure 7 is a schematic diagram of a connection structure of a connecting member in the second embodiment;

[0029] Figure 8 yes Figure 7 A schematic diagram of the connection structure of the middle connector from another perspective;

[0030] Fig. 9 is another schematic diagram of a connection structure of a connecting member in the second embodiment;

[0031] Fig.10 It is another schematic diagram of the connection structure of the connecting piece in the second embodiment.

[0032] Reference numerals:

[0033] 1000-motor; 1001-stator core; 1014-oil channel; 1002-housing; 1021-oil inlet; 1003-winding; 100-oil collecting ring; 111-first cavity; 112-second cavity; 113-inlet; 114-connecting port; 115-outlet; 12-inner ring; 121-first inner ring; 122-second inner ring; 13-outer ring; 131-first outer ring; 132-second outer ring; 14-end plate; 15-partition; 151-first ring; 152-second ring; 20-connector; 21-hollow channel. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0035] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there can be a central component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there can be a central component at the same time.

[0036] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in this application and in the specification are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in this application includes any and all combinations of one or more of the related listed items.

[0037] In conjunction with the accompanying drawings, some embodiments of the present application are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0038] The present application provides a vehicle, which includes an electric assembly, which is an important component of an electric vehicle or a hybrid vehicle, and integrates multiple components related to the conversion, transmission and use of electric energy. As one of the important components of the electric assembly, the motor can convert electric energy into mechanical energy to provide power for the vehicle to travel.

[0039] The electric assembly usually also includes a battery pack, a battery management system (BMS), a controller (such as a motor controller and a vehicle controller), a transmission device (such as a reducer or a gearbox), and other related electrical and mechanical components. This application does not provide a detailed description of this.

[0040] See also Figure 1 and Figure 2 The motor 1000 includes a stator core 1001 and an oil collecting ring 100 . The oil collecting ring 100 is disposed at an axial end of the stator core 1001 . The oil collecting ring 100 is used to cool the motor 1000 .

[0041] It can be understood that the motor 1000 further includes a necessary or unnecessary housing 1002, a winding 1003, a rotor and lead wires; the stator core 1001 includes a stator yoke and a plurality of stator teeth, the stator teeth are protruding from the inner wall of the stator yoke, tooth slots are formed between adjacent stator teeth, and the plurality of tooth slots are arranged at intervals along the circumferential direction of the inner wall of the stator yoke; a portion of the winding 1003 is located in the tooth slots, and the two ends of the winding 1003 along the axial direction of the stator core 1001 are exposed in the tooth slots, and the exposed ends of the winding 1003 extend into the oil collecting ring 100. The stator core 1001 and the oil collecting ring 100 are both fixed in the housing 1002, an oil passage 1014 is provided on the outer wall of the stator yoke, an oil inlet 1021 is provided on the housing 1002, one end of the oil passage 1014 is connected to the oil inlet 1021, and the other end of the oil passage 1014 is connected to the inner cavity of the oil collecting ring 100. The rotor is arranged through the stator core 1001. During the operation of the motor 1000, the winding 1003 is energized to drive the rotor to rotate. The winding 1003 is the main source of heat. The cooling oil sprays or immerses the winding 1003 through the oil inlet 1021, the oil channel 1014 and the oil collecting ring 100 for cooling.

[0042] The lead wires include the three-phase lead wires of the motor 1000 and the thermocouple wires. The lead wires need to pass through the oil collecting ring 100, and the part where the lead wires pass through needs to be sealed to avoid leakage of the cooling oil.

[0043] See also Figures 3 to 5 In one embodiment, the oil collecting ring 100 includes a first part, a second part and a partition 15, the first part and the second part are respectively connected to the partition 15 on both sides along the axial direction of the oil collecting ring 100, and a first cavity 111 is formed between the first part and the partition 15. The first part has an opening arranged opposite to the partition 15, and the winding 1003 passes through the opening and extends into the first cavity 111; a second cavity 112 is formed between the second part and the partition 15, and an inlet 113 is provided on the second part, and the inlet 113 is connected to the oil passage 1014 on the stator core 1001; the partition 15 is provided with a connecting port 114 connecting the second cavity 112 and the first cavity 111, and the cooling oil enters the second cavity 112 through the oil passage 1014 and the inlet 113, and the cooling oil in the second cavity 112 enters the first cavity 111 from the connecting port 114, thereby cooling the winding 1003 in the first cavity 111.

[0044] The axial direction of the oil collecting ring 100 is Figure 1 In the X direction, the radial direction of the oil collecting ring 100 is Figure 1 The Y direction in the figure is used as a reference for the axial direction and radial direction in the following text.

[0045] It can be understood that the first part and the second part are distinguished only for the convenience of description. In practical applications, the oil collecting ring 100 can be an integral structure, and the interior of the oil collecting ring 100 is separated by a partition 15 into a first cavity 111 and a second cavity 112 (axial double-layer structure) spaced apart in the axial direction. The partition 15 is provided with a connecting port 114 connecting the first cavity 111 and the second cavity 112. In this embodiment, the oil collecting ring 100 forms two layers of cavities, the first cavity 111 and the second cavity 112 arranged in the axial direction. The cooling oil in the second cavity 112 enters the first cavity 111 through the connecting port to cool down the axial end of the partial winding 1003 and the stator core 1001 extending into the first cavity 111. Since there is no other obstruction on the radial outer side of the first cavity 111, the radial space of the first cavity 111 is only limited by the size of the internal space of the shell 1002, and can be suitable for the application environment of the multi-layer winding 1003.

[0046] The oil collecting ring 100 has an inlet 113 connected to the second cavity 112, and the cooling oil enters the second cavity 112 through the inlet 113. The cooling oil first enters the second cavity 112 for buffering, and then enters the first cavity 111 through the connecting port 114, which can slow down the flow rate of the cooling oil entering the first cavity 111, so as to improve the cooling efficiency of the winding 1003.

[0047] In addition, the second cavity 112 supplies cooling oil to the first cavity 111 through the connecting port 114. The first cavity 111 is not directly connected to the oil passage 1014 of the stator core 1001. The pressure loss in the second cavity 112 is small, and the cooling oil enters the first cavity 111 at a faster speed, which can enhance the disturbance effect on the cooling oil and enhance the convective heat transfer of the winding 1003 and the stator core 1001.

[0048] The oil collecting ring 100 also has an opening connected to the first cavity 111, and the winding 1003 extends into the first cavity 111 from the opening. It can be understood that the edge of the opening can be sealed with the end surface of the stator core 1001 to prevent leakage of the cooling oil in the first cavity 111. The present application does not limit the sealing form between the oil collecting ring 100 and the stator core 1001.

[0049] The oil collecting ring 100 may include an inner ring portion 12, an outer ring portion 13, a partition 15 and an end plate 14. The inner ring portion 12 and the outer ring portion 13 are both annular structures. The outer ring portion 13 is arranged on the radial outside of the inner ring portion 12. The inner edge of the partition 15 is connected to the inner ring portion 12, and the outer edge of the partition 15 is connected to the outer ring portion 13, thereby separating the first cavity 111 and the second cavity 112; the inner ring portion 12 is divided into a first inner ring portion 121 and a second inner ring portion 122 by the partition 15, and the outer ring portion 13 is divided into a first outer ring portion 131 and a second outer ring portion 132 by the partition 15.

[0050] In the first example of this implementation mode, Figures 3 to 5 As shown, the first part includes a first inner ring portion 121 and a first outer ring portion 131, and the first cavity 111 is surrounded by the first inner ring portion 121, the first outer ring portion 131 and the partition 15, and an opening is formed between the first inner ring portion 121 and the first outer ring portion 131. Since there is no other component blocking, the radial distance between the second inner ring portion 122 and the first inner ring portion 121 is the radial size of the first cavity 111, and the space between the second inner ring portion 122 and the first inner ring portion 121 is fully utilized, which is conducive to the multi-layer winding 1003 extending from the opening into the first cavity 111.

[0051] The diameter of the first outer ring portion 131 can be smaller than the outer diameter of the end plate 14. In this case, a channel is formed between the first outer ring portion 131 and the shell 1002. According to the oil inlet method of the second cavity 112 in the second part, the cooling oil can enter the second cavity 112 through the channel between the first outer ring portion 131 and the shell 1002, or the second cavity 112 can be connected by setting an oil circuit on the shell 1002.

[0052] The diameter of the first outer ring portion 131 can be equal to the outer diameter of the end plate 14. Both the end plate 14 and the first outer ring portion 131 are in contact with the inner wall surface of the housing 1002, which can increase the contact area and improve the stability of the oil collecting ring 100 installed in the housing 1002. In this case, the side of the first outer ring portion 131 away from the first inner ring portion 121 forms an oil passage extending in the axial direction. The oil passage is not directly connected to the first cavity 111. One end of the oil passage is connected to the second cavity 112. The end of the oil passage away from the second cavity forms an inlet 113, and the inlet 113 is connected to the oil passage 1014 on the stator core 1001. The second cavity 112 and the oil passage 1014 on the stator core 1001 are connected through the oil passage, so that the first outer ring portion 131 and the inner wall surface of the housing 1002 can maintain a large contact area, thereby improving the stability of the oil collecting ring 100 installed in the housing 1002. In other embodiments, an oil passage may be provided on the housing 1002 to connect to the second cavity 112 .

[0053] In the second example of this embodiment, Figure 3 and Figure 4 As shown, the second part includes an end plate 14, a second inner ring portion 122 and a second outer ring portion 132. The end plate 14 and the partition plate 15 are axially spaced apart, the second outer ring portion 132 is arranged radially outside the second inner ring portion 122, and the second outer ring portion 132 and the second inner ring portion 122 are both connected between the end plate 14 and the partition plate 15.

[0054] The diameter of the second outer ring portion 132 may be smaller than the outer diameter of the end plate 14. Figure 3As shown, the second cavity 112 is surrounded by the end plate 14, the second inner ring portion 122, the second outer ring portion 132 and the partition plate 15, and an inlet 113 is provided on the second outer ring portion 132. The outer edge of the end plate 14 abuts against and seals the inner wall of the housing 1002. Since the diameter of the second outer ring portion 132 is smaller than the outer diameter of the end portion, that is, there is a gap between the second outer ring portion 132 and the inner wall of the housing 1002 for cooling oil to flow, the inlet 113 is provided on the second outer ring portion 132, so that the cooling oil can flow into the second cavity 112 from the inlet 113.

[0055] The diameter of the second outer ring portion 132 may be consistent with the outer diameter of the end plate 14. Figure 4 As shown, the second outer ring portion 132 is connected to the outer edge of the end plate 14, and the end plate 14 and the second outer ring portion 132 are in contact with the inner wall of the housing 1002, so that the contact area between the oil collecting ring 100 and the housing 1002 can be increased, and the stability of the oil collecting ring 100 installed in the housing 1002 can be improved. In this case, the second cavity 112 is surrounded by the end plate 14, the second inner ring portion 122, the second outer ring portion 132 and the partition 15, and the inlet 113 can be opened on the second outer ring portion 132, and the oil passage 1014 on the stator core 1001 and the inlet 113 are connected by setting an oil passage on the housing 1002. The inlet 113 can also be opened on the partition 15, and the inlet 113 is located at the periphery of the first outer ring portion 131. It is understandable that the diameter of the first outer ring portion 131 needs to be smaller than the outer diameter of the end plate 14 , and the cooling oil flows through the channel formed between the first outer ring portion 131 and the inner wall of the shell 1002 and then enters the second cavity 112 through the inlet 113 .

[0056] In the third example of this embodiment, Figure 5 As shown, the second part includes an end plate 14 and a second inner ring portion 122. The third example differs from the second example in that it does not have a second outer ring portion 132. The second cavity 112 is surrounded by the end plate 14, the partition plate 15, the second inner ring portion 122 and the inner wall of the shell 1002. In this case, an oil passage can be directly provided on the shell 1002 to connect the second cavity 112 and the oil passage 1014 on the stator core 1001.

[0057] When the outer diameter of the partition 15 is smaller than that of the end plate 14 , an inlet 113 is formed between the edges of the partition 15 and the end plate 14 . When the outer diameter of the partition 15 is equal to that of the end plate 14 , the partition 15 has an inlet 113 .

[0058] It can be understood that, in the absence of conflict, the first example and the second example can be combined with each other, and the first example and the third example can also be combined with each other, and this application does not limit this.

[0059] No matter the first example is combined with the second example or the first example is combined with the third example, the oil collecting ring 100 has a first inner ring and a second inner ring, and the outlet 115 can be set at different positions according to the size relationship between the first inner ring and the second inner ring.

[0060] Specifically, when the first inner ring portion 121 and the second inner ring portion 122 are flush, the first inner ring portion 121 and the second inner ring portion 122 can be regarded as a whole. At this time, the outlet 115 can be set on the first inner ring portion 121. At this time, the cooling oil enters the first cavity 111 axially from the connecting port 114 on the partition 15, and flows out radially from the first inner ring portion 121 after exchanging heat with the end of the winding 1003 and the stator core 1001. Compared with entering and exiting radially, the flow path of the cooling oil can be increased, and a turbulent flow is formed in the first cavity 111, which is beneficial to contact and heat exchange with the winding 1003 and the stator core 1001.

[0061] When the diameter of the second inner ring portion 122 is smaller than the diameter of the first inner ring portion 121, the inner ring portion 12 is a stepped structure, the inner edge of the partition 15 is connected to the first outer ring portion 131, and part of the partition 15 is located between the first inner ring portion 121 and the second inner ring portion 122. In this case, the outlet 115 can be set on the first inner ring portion 121, and its function is the same as when it is flush with the first inner ring portion 121 and the second inner ring portion 122. The outlet 115 can also be set on the partition 15, located between the first inner ring portion 121 and the second inner ring portion 122, such as Figure 1 As shown, the partition 15 includes a first ring portion 151 and a second ring portion 152, the outer edge of the first ring portion 151 is connected to the second inner ring portion 122, and the inner edge of the first ring portion 151 is connected to the first inner ring portion 121; the outer edge of the second ring portion 152 is connected to the second outer ring portion 132, and the inner edge of the second ring portion 152 is connected to the second inner ring portion 122; and the first ring portion 151 is provided with an outlet 115 connected to the first cavity 111. Therefore, the cooling oil in the first cavity 111 flows out from the outlet 115 in the axial direction, and the flow direction of the cooling oil flowing out from the outlet 115 is toward the end cover of the housing 1002, rather than directly splashing on the rotor, which can reduce the impact on the movement of the rotor.

[0062] The second outer ring 132 may be a complete annular structure, that is, in a cross section perpendicular to the central axis of the oil collecting ring 100, the second outer ring 132 is annular. When no other components are arranged on the inner wall of the shell 1002, an annular second outer ring 132 may be selected to match the cross-sectional shape of the second outer ring 132 with the shell 1002, thereby keeping the second outer ring 132 in contact with the inner wall of the shell 1002 or forming a gap of equal diameter. The second outer ring may be formed by connecting two or more rings of different diameters, such as Figure 6As shown, the second outer ring portion 132 includes at least two arc segments connected end to end and having different diameters. When other components are arranged on the inner wall of the housing 1002, the second outer ring portion 132 is formed by connecting two or more circular rings of different diameters, thereby avoiding the components on the inner wall of the housing 1002, and facilitating welding to fill the gap between the housing 1002 and the second outer ring portion 132.

[0063] Similar to the second outer ring portion 132, the first outer ring portion 131 may be a complete annular structure, or may be formed by connecting two or more annular rings of different diameters. In other words, in a cross section perpendicular to the central axis of the oil collecting ring 100, the first outer ring portion 131 is annular, or the first outer ring portion 131 includes at least two arc segments connected end to end and having different diameters. This application will not further describe this in detail.

[0064] The first inner ring portion 121 and the second inner ring portion 122 may be arranged according to the shapes of the first outer ring portion 131 and the second outer ring portion 132. The first inner ring portion 121 and the second inner ring portion 122 may also be complete annular structures, or formed by connecting two or more annular rings of different diameters.

[0065] In some embodiments, see Figures 7 to 10 The oil collecting ring 100 also includes a connector 20, which has a hollow channel 21. The oil collecting ring 100 has a variety of installation methods. No matter which installation method is used, the lead wires on the winding 1003 pass through the hollow channel 21, and a seal is placed on the lead wire jacket, and the seal abuts against the inner wall of the hollow channel 21 to prevent leakage of cooling oil. It can be understood that the size of the hollow channel 21 of the connector 20 can be larger than the size of the lead wire, which is convenient for the lead wire to pass through, and can be filled and sealed by the seal.

[0066] Specifically, the connector 20 can be connected to the end plate 14, the hollow channel 21 is connected to the second cavity 112, and the partition plate 15 is provided with a wire hole corresponding to the hollow channel 21. Figure 7 and Figure 8 As shown, the lead wire passes through the wire hole, passes through the second cavity 112 and then enters the hollow channel 21. It should be clarified that in this embodiment, a seal can be set between the lead wire and the edge of the wire hole, and a gap can be maintained between the lead wire and the wire hole for cooling oil to enter the second cavity from the first cavity.

[0067] The connector 20 can pass through the end plate 14 and connect to the partition plate 15, and the hollow channel 21 is in communication with the first cavity 111. Fig. 9 As shown, the connection piece 20 and the end plate 14 are sealed, specifically by means of sealant, welding, etc., and the lead wires pass directly through the hollow channel 21 .

[0068] The connecting member 20 can also be connected to the first outer ring portion 131, and the hollow channel 21 is connected to the first cavity 111. Fig.10 As shown, the connection member 20 and the first outer ring portion 131 are sealed, specifically by means of sealant, welding, etc., and the lead wire is bent and directly passes through the hollow channel 21.

[0069] It should be noted that in the motor 1000 of the present application, both ends of the stator core 1001 are provided with oil collecting rings 100, and at least one oil collecting ring 100 adopts the structure in the above-mentioned embodiment. That is to say, among the oil collecting rings 100 at both ends of the stator core 1001, one of the oil collecting rings 100 adopts an axial double-layer structure, and the other oil collecting ring 100 adopts a single-layer structure or an axial double-layer structure.

[0070] In the description of the embodiments of the present application, it should be noted that the orientation or positional relationship of terms such as "center", "up", "down", "left", "right", "vertical", "horizontal", "inside" and "outside" are based on the orientation or positional relationship described in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0071] What is disclosed above is only a preferred embodiment of the present application, and it certainly cannot be used to limit the scope of rights of the present application. Ordinary technicians in this field can understand that all or part of the processes of implementing the above embodiment and equivalent changes made according to the claims of the present application are still within the scope covered by the present application.

Claims

1. An oil collecting ring, characterized in that: The oil collecting ring has a first cavity and a second cavity axially spaced apart, and includes a partition separating the first cavity and the second cavity, and a connecting port connecting the first cavity and the second cavity is opened on the partition and is used to introduce the cooling medium in the second cavity into the first cavity; the first cavity is used to accommodate the winding of the motor.

2. The oil collecting ring according to claim 1, characterized in that: The oil collecting ring includes a first inner ring portion and a first outer ring portion, the first outer ring portion is arranged radially outside the first inner ring portion, and one axial end of the first inner ring portion and one axial end of the first outer ring portion are both connected to the partition; the first cavity is surrounded by the first inner ring portion, the first outer ring portion and the partition, and an opening is formed between the other axial end of the first inner ring portion and the other axial end of the first outer ring portion for the winding of the power supply machine to penetrate into the first cavity.

3. The oil collecting ring according to claim 2, characterized in that: The oil collecting ring includes an end plate and a second inner ring portion, the end plate and the partition are arranged at an axial interval along the oil collecting ring, the second inner ring portion is connected between the end plate and the partition, the second cavity is surrounded by the end plate, the partition and the second inner ring portion, and an inlet connected to the second cavity is formed between the radial outer side of the end plate and the radial outer side of the partition.

4. The oil collecting ring according to claim 2, characterized in that: The oil collecting ring includes an end plate, a second inner ring portion and a second outer ring portion, and the end plate and the partition are arranged at intervals along the axial direction of the oil collecting ring; the second inner ring portion and the second outer ring portion are both connected between the end plate and the partition plate, and the second cavity is surrounded by the end plate, the second inner ring portion, the second outer ring portion and the partition plate, and the second outer ring portion is arranged on the radial outside of the second inner ring portion, and the second outer ring portion is provided with an inlet connected to the second cavity.

5. The oil collecting ring according to claim 4, characterized in that: The diameter of the first outer ring portion is smaller than the outer diameter of the end plate.

6. The oil collecting ring according to claim 4, characterized in that: An oil passage extending along the axial direction of the oil collecting ring is formed on a side of the first outer ring portion away from the first inner ring portion. The oil passage is connected to the second cavity, and one end of the oil passage forms an inlet connected to the second cavity.

7. The oil collecting ring according to claim 4, characterized in that: The first inner ring portion is provided with an outlet communicating with the first cavity.

8. The oil collecting ring according to claim 4, characterized in that: The partition includes a first ring portion and a second ring portion, the outer edge of the first ring portion is connected to the second inner ring portion, the inner edge of the first ring portion is connected to the first inner ring portion, and the first ring portion is provided with an outlet connected to the first cavity; the outer edge of the second ring portion is connected to the second outer ring portion, and the inner edge of the second ring portion is connected to the second inner ring portion.

9. The oil collecting ring according to claim 4, characterized in that: In a cross section perpendicular to the central axis of the oil collecting ring, the first outer ring portion is in a circular ring shape, or the first outer ring portion includes at least two arc segments connected end to end and having different diameters.

10. The oil collecting ring according to claim 4, characterized in that: In a cross section perpendicular to the central axis of the oil collecting ring, the second outer ring portion is in the shape of a circular ring, or the second outer ring portion includes at least two arc segments connected end to end and having different diameters.

11. The oil collecting ring according to claim 4, characterized in that: The oil collecting ring also includes a connecting piece, which has a hollow channel for the lead wire on the winding to pass through; the connecting piece is connected to the end plate, the hollow channel is connected to the second cavity, and the partition is provided with a wire hole corresponding to the hollow channel.

12. The oil collecting ring according to claim 4, characterized in that: The oil collecting ring further comprises a connecting piece, wherein the connecting piece has a hollow passage for the lead wire on the winding to pass through; the connecting piece passes through the end plate and is connected to the partition plate, and the hollow passage is in communication with the first cavity.

13. The oil collecting ring according to claim 4, characterized in that: The oil collecting ring further includes a connecting piece having a hollow channel for a lead wire on a winding to pass through; the connecting piece is connected to the first outer ring portion, and the hollow channel is in communication with the first cavity.

14. A motor, characterized in that: The motor comprises a stator core and at least one oil collecting ring according to any one of claims 1 to 13, wherein the oil collecting ring is arranged at an end portion of the stator core along an axial direction.

15. An electric assembly, characterized in that: The electric powertrain includes the electric machine according to claim 14 .

16. A vehicle, characterized in that: The vehicle comprises the electric machine according to claim 14 or the electric powertrain according to claim 15 .

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