Oil collecting ring, motor, electric assembly and vehicle

Abstract

The invention provides an oil collecting ring, a motor, an electric assembly and a vehicle, the oil collecting ring is provided with a first cavity and a second cavity which are arranged at an interval, the oil collecting ring is provided with a communication port, and the communication port is communicated with the first cavity and the second cavity; the second cavity is used for allowing a winding of the motor to pass through; the oil collecting ring is further provided with a plurality of first openings communicating with the second cavity. According to the air conditioner, the cooling oil liquid after heat exchange can be discharged out of the second cavity through the first opening, the pressure in the second cavity is reduced, and the cooling oil liquid in the first cavity can smoothly enter the second cavity through the communicating opening. Compared with a traditional oil discharge mode, the multiple first openings can disturb cooling oil in different positions, so that the cooling oil of the oil collecting ring is discharged in time from the nearest first opening, and the heat exchange effect and the heat exchange balance are improved.

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 ring covers the winding end of the stator, and the cooling oil flows into the cavity inside the oil collecting ring to cool the stator of the motor. The oil outlet is usually set at the top of the oil collecting ring to ensure that the cooling oil can accumulate in the cavity of the oil collecting ring and infiltrate the winding of the section. However, the above structure easily leads to poor fluidity of the cooling oil in the oil collecting ring, thereby reducing the cooling effect. Summary of the invention

[0003] The present application provides an oil collecting ring, a motor, an electric assembly and a vehicle that are beneficial to improving the cooling effect.

[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 arranged at intervals, and the oil collecting ring has a connecting port, which connects the first cavity and the second cavity; the second cavity is used to accommodate the winding of the motor to pass through; the oil collecting ring also has a plurality of first ports connected to the second cavity.

[0005] According to the first aspect, in a possible implementation manner, the first port is configured such that when the pressure of the medium in the second cavity is greater than a first predetermined value, the medium can be discharged through the first port.

[0006] According to the first aspect, in a possible implementation, the oil collecting ring further has a second port communicating with the second cavity;

[0007] The second port is configured such that the medium in the second cavity can be discharged through the second port when the medium reaches a predetermined height; and / or the second port is configured such that the medium in the second cavity can be discharged through the second port when the pressure is greater than a second predetermined value.

[0008] According to the first aspect, in a possible implementation, the cross-sectional area of ​​the second opening is greater than or equal to 15 mm 2 .

[0009] According to the first aspect, in a possible implementation manner, a third port communicating with the first cavity is formed on the oil collecting ring, or the oil collecting ring is suitable for forming the third port communicating with the first cavity with the casing of the motor.

[0010] According to the first aspect, in a possible implementation manner, there are multiple communication ports, and the communication ports are configured such that when the medium pressure in the first cavity is greater than a threshold, the medium can enter the second cavity through the communication ports.

[0011] According to the first aspect, in a possible implementation manner, the cross-sectional area of ​​the first opening is 0.7 mm 2 Up to 13mm 2 .

[0012] According to the first aspect, in a possible implementation, the outer ring portion and the end plate, the inner ring portion and the outer ring portion are connected to the same side of the end plate, and the outer ring portion is arranged radially outside the inner ring portion; the first cavity is formed on the side of the outer ring portion away from the inner ring portion, the second cavity is formed between the outer ring portion and the inner ring portion, and the connecting port is opened on the outer ring portion.

[0013] According to the first aspect, in a possible implementation, the plurality of connecting ports are divided into a plurality of groups, each group of connecting ports includes a plurality of connecting ports, the plurality of connecting ports in each group are arranged at circumferential intervals along the outer ring portion, and the connecting ports in each group are arranged at axial intervals along the oil collecting ring.

[0014] According to the first aspect, in a possible implementation manner, two adjacent groups of the communication ports are staggered; or a plurality of groups of the communication ports are aligned along the axial direction of the oil collecting ring.

[0015] According to the first aspect, in a possible implementation manner, the first port is provided on the inner ring portion or the end plate.

[0016] According to the first aspect, in a possible implementation, the oil collecting ring further includes a connecting piece, which is connected to one of the end plate and the outer ring portion; the connecting piece has a hollow channel, and the hollow channel is connected to the second cavity.

[0017] According to the first aspect, in a possible implementation, the oil collecting ring includes an inner ring portion, an outer ring portion, an end plate and a partition plate, the outer ring portion is arranged at the radial periphery of the inner ring portion, the end plate and the partition plate are both connected between the inner ring portion and the outer ring portion, and the end plate and the partition plate are arranged at intervals along the axial direction of the oil collecting ring, the first cavity is formed between the end plate and the partition plate, the second cavity is formed on the side of the partition plate away from the end plate, and the connecting port is opened on the partition plate.

[0018] According to the first aspect, in a possible implementation manner, the first port is provided in the inner ring portion.

[0019] According to the first aspect, in a possible implementation, the partition divides the inner ring portion into a first inner ring portion and a second inner ring portion, the first inner ring portion is connected between the end plate and the partition, and the second inner ring portion is arranged on the side of the partition away from the end plate; the partition includes a first ring portion and a second ring portion, the outer edge of the first ring portion is connected to the outer ring portion, and the inner edge of the first ring portion is connected to the first inner ring portion; the outer edge of the second ring portion is connected to the first inner ring portion, and the inner edge of the second ring portion is connected to the second inner ring portion; and the second ring portion is provided with a first port connected to the second cavity.

[0020] According to the first aspect, in a possible implementation, the oil collecting ring also includes a connecting piece, the connecting piece has a hollow channel; the connecting piece is connected to the end plate, the hollow channel is connected to the first cavity, and a wire hole corresponding to the hollow channel is opened on the partition.

[0021] According to the first aspect, in a possible implementation, the oil collecting ring further includes a connecting piece having a hollow channel; the connecting piece passes through the end plate and is connected to the partition plate, and the hollow channel is in communication with the second cavity.

[0022] According to the first aspect, in a possible implementation, the oil collecting ring further includes a connecting piece having a hollow channel; the connecting piece is connected to the outer ring portion, and the hollow channel is in communication with the second cavity.

[0023] According to the first aspect, in a possible implementation, on a cross section perpendicular to the center axis of the oil collecting ring, the outer ring portion is annular, or the outer ring portion includes at least two arc segments connected end to end and having different diameters.

[0024] In a second aspect, an embodiment of the present application further provides a motor, comprising a stator core cover and at least one oil collecting ring as described in the first aspect, wherein the oil collecting ring is arranged at an axial end of the stator core.

[0025] In a third aspect, an embodiment of the present application further provides an electric assembly, which includes the motor according to the second aspect.

[0026] In a fourth aspect, an embodiment of the present application further provides a vehicle, comprising the motor described in the second aspect or the electric assembly described in the third aspect.

[0027] In the oil collecting ring, motor, electric assembly and vehicle provided by the present application, the oil collecting ring has a first cavity and a second cavity arranged at intervals, the first cavity and the second cavity are connected through a connecting port, the cooling oil in the first cavity enters the second cavity through the connecting port, and the stator of the motor is sprayed or immersed for heat exchange; the cooling oil after heat exchange can be discharged from the second cavity through the first port, reducing the pressure in the second cavity, so that the cooling oil in the first cavity can smoothly enter the second cavity through the connecting port. In addition, compared with the traditional oil discharge method, multiple first ports can disturb the cooling oil at different positions, so that the cooling oil in the oil collecting ring can be discharged from the nearest first port in time, improving the heat exchange effect and heat exchange balance. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] 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.

[0029] Figure 1 is a schematic diagram of the flow path of cooling oil in a motor according to an embodiment of the present application;

[0030] Figure 2 It is a structural schematic diagram of the oil collecting ring in the first embodiment of the present application;

[0031] Figure 3 yes Figure 2 Structural diagram of the oil collecting ring from another perspective;

[0032] Figure 4 This is a structural schematic diagram of an oil collecting ring in the second embodiment of the present application;

[0033] Figure 5 is another structural schematic diagram of the oil collecting ring in the second embodiment of the present application;

[0034] Figure 6 This is another structural schematic diagram of the oil collecting ring in the second embodiment of the present application;

[0035] Figure 7 is a schematic diagram of the flow path of cooling oil in a motor according to another embodiment of the present application;

[0036] Figure 8 is a schematic diagram of the flow path of cooling oil in a motor according to another embodiment of the present application;

[0037] Fig. 9 is a schematic diagram of the flow path of cooling oil in a motor according to another embodiment of the present application;

[0038] Fig.10 It is a schematic structural diagram of the outer ring portion of an embodiment of the present application;

[0039] Fig.11 is a schematic diagram of a connection structure of a connecting member in the second embodiment;

[0040] Fig.12 yes Fig.11 A schematic diagram of the connection structure of the middle connector from another perspective;

[0041] Fig.13 is another schematic diagram of a connection structure of a connecting member in the second embodiment;

[0042] Fig.14 It is another schematic diagram of the connection structure of the connecting piece in the second embodiment.

[0043] Reference numerals:

[0044] 1000-motor; 1001-stator core; 1014-oil channel; 1002-casing; 1021-oil inlet; 1003-winding; 100-oil collecting ring; 111-first cavity; 112-second cavity; 113-third port; 114-connecting port; 115-first port; 116-second port; 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-connecting piece; 21-hollow channel. DETAILED DESCRIPTION

[0045] 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.

[0046] 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.

[0047] 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.

[0048] 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.

[0049] 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.

[0050] 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.

[0051] See also Figure 1 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 .

[0052] 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.

[0053] 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 prevent leakage of the cooling oil.

[0054] See also Figures 1 to 3 The oil collecting ring 100 has a first cavity 111 and a second cavity 112 which are arranged at intervals, and a partition separating the first cavity 111 and the second cavity 112. The partition is provided with a connecting port 114 connecting the first cavity 111 and the second cavity 112. The cooling oil in the first cavity 111 enters the second cavity 112 through the connecting port 114, so as to realize the spraying or immersion heat exchange of the winding 1003 and the stator core 1001. The cooling oil after the heat exchange can be discharged from the second cavity 112 through the first port 115, so as to reduce the pressure in the second cavity 112, so that the cooling oil in the first cavity 111 can smoothly enter the second cavity 112 through the connecting port 114. Moreover, compared with the traditional oil discharge method, the multiple first ports 115 in the present application can disturb the cooling oil at different positions, so that the cooling oil at the bottom of the oil collecting ring 100 can be discharged from the nearest first port 115 in time, so as to improve the heat exchange effect and heat exchange balance.

[0055] The oil collecting ring 100 is provided with a third port 113 communicating with the first cavity 111, or the oil collecting ring 100 and the housing 1002 form a third port 113 communicating with the first cavity 111. The cooling oil enters the first cavity 111 through the oil passage 1014 and the third port 113 on the stator core 1001; the cooling oil first enters the first cavity 111 for buffering, and then enters the second cavity 112 through the communication port 114, which can slow down the flow rate of the cooling oil entering the second cavity 112, thereby improving the cooling efficiency of the winding 1003.

[0056] In the present embodiment, the oil collecting ring 100 is an annular structure as a whole, and the oil collecting ring 100 has a hollow portion. A plurality of first ports 115 may be arranged at intervals around the hollow portion of the oil collecting ring 100. Specifically, a plurality of first ports 115 tend to be arranged at intervals along the circumference of the oil collecting ring 100. It can be understood that the distance between each first port 115 and the central axis of the oil collecting ring 100 may have a certain error.

[0057] The first cavity 111 and the second cavity 112 can be arranged at intervals along the radial direction of the oil collecting ring 100 (radial double-layer structure), such as Figure 2 and Figure 3 The first cavity 111 and the second cavity 112 may also be arranged at intervals along the axial direction of the oil collecting ring 100 (axial double-layer structure), such as Figures 4 to 6As shown, the present application does not limit the positional relationship between the first cavity 111 and the second cavity 112. Regardless of whether the oil collecting ring 100 adopts a radial double-layer structure or an axial double-layer structure, as shown in FIG. Figure 1 , Figures 7 to 9 As shown, the flow path of the cooling oil is the oil passage 1014 on the stator core 1001 - the third port 113 - the first cavity 111 - the oil port - the second cavity 112 - the second port 116 .

[0058] 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.

[0059] In some embodiments, there are multiple communication ports 114, and the multiple communication ports 114 are configured such that when the medium pressure in the first cavity 111 is greater than a threshold value, the medium can enter the second cavity 112 through the communication ports 114. That is, the communication port 114 is a throttle hole, which will open and introduce the cooling oil into the second cavity 112 only when the pressure difference between the inside and outside is large. Thus, after a certain amount of cooling oil is filled in the first cavity 111, the cooling oil is introduced into the second cavity 112 from multiple positions through the multiple communication ports 114, further improving the fluidity of the cooling oil in the second cavity 112. Among them, the threshold value can be set according to actual needs, so as to achieve the above functions.

[0060] In some embodiments, the plurality of communication ports 114 may be arranged in a circumferential distribution, and the first cavity 111 and the second cavity 112 may both be annular cavities.

[0061] In some embodiments, see Figures 1 to 3 The oil collecting ring 100 may have a first port 115 and a second port 116 at the same time. The first port 115 is configured such that when the pressure of the medium in the second cavity 112 is greater than a first predetermined value, the medium can be discharged through the first port 115; the second port 116 is configured such that when the medium in the second cavity 112 reaches a predetermined height, the medium can be discharged through the second port 116. In this embodiment, two outlets are provided, wherein the first port 115 is used to discharge the cooling oil from multiple positions to disturb the cooling oil in the second cavity 112, and the second port 116 is used to discharge the cooling oil when the cooling oil completely fills or substantially completely fills the second cavity 112, so as to ensure the fluidity of the cooling oil.

[0062] The first port 115 is a throttle hole, which will only open and discharge the cooling oil when the internal and external pressure difference is large, so as to ensure that the cooling oil can accumulate in the second cavity 112 and immerse and cool the stator winding 1003. When the medium pressure in the second cavity 112 is greater than the first predetermined value, it indicates that the internal and external pressure difference of the first port 115 reaches the opening condition of the first port 115. At this time, a certain amount of cooling oil has accumulated in the second cavity 112 and needs to be discharged to ensure the fluidity of the cooling oil. It should be noted that the cross-sectional area of ​​the connecting port 114 is greater than the sum of the cross-sectional areas of the first ports 115, that is, the discharge rate of the first port 115 needs to be lower than the rate at which the first cavity 111 conveys the cooling oil to the second cavity 112 through the connecting port 114. In other words, while the first port 115 discharges the cooling oil, the cooling oil in the second cavity 112 can continue to increase, so as to ensure that the cooling oil can accumulate in the second cavity 112 and immerse and cool the stator winding 1003. Specifically, the predetermined value can be set according to actual needs so as to achieve the above functions.

[0063] When the cooling oil completely fills or substantially completely fills the second cavity 112, the cooling oil level reaches the second port 116 and can be discharged through the second port 116. As mentioned above, the first port 115 can only disturb the cooling oil and cannot prevent the cooling oil from continuing to increase. Therefore, the second port 116 needs to be set so that the cross-sectional area of ​​the second port 116 is larger than the cross-sectional area of ​​the connecting port 114 to ensure that the cooling oil can be discharged to ensure the overall fluidity of the cooling oil. Specifically, the predetermined height can be set according to actual needs to achieve the above functions.

[0064] Specifically, in order to achieve that the medium in the second cavity 112 can be discharged through the first port 115 when the pressure is greater than a predetermined value, and the medium in the second cavity 112 can be discharged through the second port 116 when the medium reaches a predetermined height, in an optional embodiment, Figure 2As shown, the intersection of the outer edge of the oil collecting ring 100 and the diameter passing through the second port 116 is the reference point O, the distance between the second port 116 and the reference point O is H, and the radial distance between the first port 115 and the reference point O along the second port 116 is h, wherein H>h. In this embodiment, the position of the first port 115 is referred to by the midpoint position of the first port 115, and the position of the second port 116 is referred to by the lowest point position of the second port 116 (the edge position close to the reference point O). In actual use, the second port 116 is arranged close to the top of the oil collecting ring 100, and the position of the second port 116 is higher than the first port 115. Based on the situation that multiple first ports 115 are arranged at intervals along the circumferential direction, the second port 116 can be arranged on the periphery of the first port 115. In this case, the cooling oil can be accumulated in the second cavity 112 until it flows out from the second port 116; when the lubricating oil does not flow out from the second port 116 in time and the pressure in the second cavity 112 is too high, the lubricating oil can flow out from the first port 115 to reduce the pressure in the second cavity 112. That is, the second port 116 serves as the main first port for the cooling oil, and the first port 115 serves as an auxiliary oil outlet, reducing the pressure in the second cavity 112, so that the cooling oil at the bottom is discharged in time, thereby improving the heat exchange effect and heat exchange balance.

[0065] In some embodiments, see Figures 1 to 3 The oil collecting ring 100 may have a first port 115 and a second port 116 at the same time. The first port 115 is configured such that when the pressure of the medium in the second cavity 112 is greater than a first predetermined value, the medium can be discharged through the first port 115; the second port 116 is configured such that when the pressure of the medium in the second cavity 112 is greater than a second predetermined value, the medium can be discharged through the second port 116. In this embodiment, two outlets are provided, wherein the first port 115 is used to discharge the cooling oil from multiple positions to disturb the cooling oil in the second cavity 112, and the second port 116 is used to discharge the cooling oil when the oil pressure in the second cavity 112 rises to a second predetermined value to ensure the fluidity of the cooling oil.

[0066] As explained above, the first port 115 is a throttle hole, which will open and discharge the cooling oil only when the internal and external pressure difference is large, so as to ensure that the cooling oil can accumulate in the second cavity 112 and immerse and cool the stator winding 1003. Specifically, when the medium pressure in the second cavity 112 is greater than the first predetermined value, it indicates that the internal and external pressure difference of the first port 115 reaches the opening condition of the first port 115, and at this time, a certain amount of cooling oil has accumulated in the second cavity 112, and needs to be discharged to ensure the fluidity of the cooling oil. The discharge rate of the first port 115 needs to be lower than the rate at which the first cavity 111 delivers the cooling oil to the second cavity 112 via the connecting port 114. While the first port 115 is discharging the cooling oil, the cooling oil in the second cavity 112 can continue to increase. As the cooling oil in the second cavity 112 increases, the oil pressure in the second cavity 112 continues to rise. When the medium pressure in the second cavity 112 is greater than the second predetermined value, it indicates that the internal and external pressure difference of the second port 116 has reached the opening condition of the first port 115. By setting the first port 115 and the second port 116 with different opening conditions, it is ensured that the cooling oil can be discharged to ensure the overall fluidity of the cooling oil. Specifically, the first predetermined value and the second predetermined value can be set according to actual needs, and the first predetermined value is less than the second predetermined value, so as to achieve the above functions.

[0067] Specifically, in order to realize that the medium pressure in the second cavity 112 is greater than the first predetermined value and can be discharged through the first port 115, and the medium pressure in the second cavity 112 is greater than the second predetermined value and can be discharged through the second port, in an optional embodiment, a pressure valve is provided at the second port 116 to realize that the second port 116 is opened when the second predetermined value is reached. When the second port is not opened, the cross-sectional area of ​​the first port 115 is smaller than the cross-sectional area of ​​the connecting port 114, so that the cooling oil in the second cavity 112 can continue to increase while the cooling oil in the second cavity 112 is discharged from the first port 115. When the oil pressure in the second cavity 112 rises to the second predetermined value, the second port 116 is opened, and the sum of the areas of the first port 115 and the second port 116 is greater than the area of ​​the connecting port 114, so that the cooling oil in the second cavity 112 is discharged in time, and the overall fluidity of the cooling oil is ensured. It should be noted that when the oil pressure in the second cavity 112 increases to the second predetermined value, the cooling oil in the second cavity 112 should be completely filled or substantially completely filled.

[0068] In addition, when there are multiple communication ports 114 , the cross-sectional area of ​​the second port 116 is greater than the sum of the cross-sectional areas of the multiple communication ports 114 , and the sum of the cross-sectional areas of the multiple communication ports 114 is greater than the sum of the cross-sectional areas of the multiple first ports 115 .

[0069] The shape of the second opening 116 can be a conventional geometric shape such as a circle, a rectangle, a triangle, etc. The size of the second opening 116 refers to the cross-sectional area of ​​the second opening 116. The cross-sectional area of ​​the second opening 116 is greater than or equal to 15 mm. 2 Even if there is no internal pressure in the second cavity 112, as long as the cooling oil accumulates to a level that exceeds the lower edge of the second port 116, the oil can be discharged smoothly. The shape of the first port 115 can be a conventional geometric shape such as a circle, a rectangle, or a triangle. The size of the first port 115 refers to the cross-sectional area of ​​the first port 115. The cross-sectional area of ​​the first port 115 is 0.7 mm 2 Up to 13mm 2 , thereby ensuring that the total flow of all first ports 115 is 0 or lower than the liquid inlet flow of the second cavity 112 , so that the cooling oil accumulates in the second cavity 112 and infiltrates and exchanges heat with the winding 1003 and the stator core 1001 .

[0070] In some embodiments, the first port 115 is circular, and the aperture of the first port 115 is 1 mm to 4 mm; due to the small aperture of the first port 115, when no external pressure is applied, the flow rate of the cooling oil flowing out of the first port 115 is small, that is, the cooling oil in the second cavity 112 can accumulate in the presence of the first port 115, and finally flow out from the large-sized second port 116.

[0071] The aperture of the first port 115 should not be too small. Due to the limitation of the specifications of the cooling oil itself, the cooling oil cannot flow out from the first port 115 that is too small without external pressure, or the outflow of the cooling oil from the first port 115 is small, which cannot play the role of timely discharging the cooling oil at the bottom. The aperture of the first port 115 should not be too large. When the aperture of the first port 115 is too large, the cooling oil flowing into the second cavity 112 and flowing out of the second cavity 112 from the first port 115 reach a balance, and the lubricating oil cannot fill the second cavity 112, and it is impossible to ensure effective heat exchange for all windings 1003.

[0072] See also Figures 1 to 3 In the first embodiment, the first cavity 111 and the second cavity 112 are spaced apart in the radial direction. The following description will be made by taking the first cavity 111 and the second cavity 112 spaced apart in the radial direction as an example.

[0073] The oil collecting ring 100 includes an inner ring 12, an outer ring 13 and an end plate 14. The inner ring 12 and the outer ring 13 are both annular structures. The outer ring 13 is arranged radially outside the inner ring 12. The inner ring 12 and the outer ring 13 are connected to the same side of the end plate 14. When the oil collecting ring 100 is installed in the housing 1002 of the motor 1000, the outer edge of the end plate 14 is pressed against the inner wall of the housing 1002, and the end plate 14 and the housing 1002 are sealed to prevent leakage of cooling oil. The outer ring 13 and the inner ring 12 are pressed against and sealed against the end of the stator core 1001 at the same time. The outer ring 13 serves as a separator between the first cavity 111 and the second cavity 112. The first cavity 111 is formed between the end plate 14 and the stator core 1001, between the outer ring 13 and the housing 1002, and the second cavity 112 is formed between the outer ring 13 and the inner ring 12. The oil passage 1014 on the outer wall of the stator core 1001 is connected to the first cavity 111, and the end of the winding 1003 extends into the second cavity 112. The outer ring 13 is provided with a connecting port 114, and the cooling oil enters the second cavity 112 from the connecting port 114 to cool the winding 1003 in the second cavity 112. In this embodiment, the pressure loss in the first cavity 111 is small, and the cooling oil enters the second cavity 112 at a high speed through the connecting port 114, which can disturb the cooling oil accumulated in the second cavity 112 and enhance the convection heat exchange of the winding 1003 and the stator core 1001.

[0074] Among them, the end of the outer ring 13 away from the end plate 14 and the end of the stator core 1001, and the end of the inner ring 12 away from the end plate 14 and the end of the stator core 1001 can be connected using a sealing structure commonly used in the field to prevent leakage of cooling oil, which is not limited in this embodiment.

[0075] The number of the connecting ports 114 provided on the outer ring portion 13 is greater than or equal to one. When the number of the connecting ports 114 is multiple, the multiple connecting ports 114 can be divided into one group, two groups or more groups. In some embodiments, two adjacent groups of connecting ports 114 can be staggered or aligned along the axial direction. A group of connecting ports 114 refers to a plurality of connecting ports 114 arranged at intervals along the circumference on the outer ring portion 13, and a plurality of groups of connecting ports 114 are arranged at intervals along the axial direction. The connecting ports 114 tend to be evenly arranged on the outer ring portion 13, so that multiple streams of cooling oil flowing from the outer circumference to the central axis are formed in the second cavity 112, and heat is exchanged with the winding 1003 during the flow process, thereby improving the cooling effect.

[0076] In other embodiments, the plurality of communication openings 114 are arranged in a spiral shape or irregularly distributed on the outer ring portion 13. The number and arrangement of the communication openings 114 are not limited in this embodiment.

[0077] In some embodiments, the connecting port 114 is configured so that when the medium pressure in the first cavity 111 is greater than a threshold value, the medium can enter the second cavity 112 through the connecting port 114. The connecting port 114 is a throttle hole, and will only be opened and the cooling oil will be discharged when the pressure difference between the first cavity 111 and the second cavity 112 is large, so as to ensure that the cooling oil can be accumulated in the first cavity 111. In the case of circumferentially arranging multiple connecting ports 114, the cooling oil is transported to the second cavity 112 through different connecting ports 114, and the cooling oil in the second cavity 112 is disturbed, thereby improving the heat exchange effect on the stator winding 1003. Specifically, when the medium pressure in the first cavity 111 is greater than the threshold value, it indicates that the pressure difference between the first cavity 111 and the second cavity 112 reaches the opening condition of the connecting port 114. At this time, a certain amount of cooling oil has accumulated in the first cavity 111, and it needs to be discharged to ensure the fluidity of the cooling oil, and the cooling oil in the second cavity 112 is updated in time.

[0078] In some embodiments, the first port 115 can be provided on the inner ring portion 12. When the cooling oil flows from the connecting port 114 to the inner ring portion 12, it must pass through the winding 1003, and the turbulence formed can drive the cooling oil between the two connecting ports 114 to converge to the first port 115, thereby enabling sufficient heat exchange with the winding 1003.

[0079] In some embodiments, the first port 115 may be provided on the end plate 14 so that the cooling oil flows toward the end cover of the housing 1002 when flowing out and does not spray directly on the rotor, thereby reducing the influence of the cooling oil on the rotation of the rotor.

[0080] The inner ring 12 and the outer ring 13 can be upright, that is, the inner ring 12 and the outer ring 13 extend in the axial direction, and the overall structure is simple and easy to process and form. The inner ring 12 and the outer ring 13 can also be stepped, that is, the inner ring 12 / the outer ring 13 has two or more sections of inconsistent diameters in the axial direction. When the inner ring 12 has an annular portion protruding toward the central axis of the oil collecting ring 100, and the outer ring 13 has an annular portion protruding toward the housing 1002, the radial space of the second cavity 112 can be expanded, so as to be suitable for the case of multi-layer windings 1003.

[0081] In a cross section perpendicular to the central axis of the oil collecting ring 100, the outer ring 13 can be a complete circular ring, and a certain gap can be maintained between the outer ring 13 and the housing 1002. The outer ring 13 can include at least two arc segments connected end to end and with different diameters, so as to avoid the welded structure on the inner wall of the housing 1002.

[0082] In some embodiments, see Figure 2The oil collecting ring 100 also includes a connector 20, which has a hollow channel 21; the oil collecting ring 100 is connected to one of the end plate 14 and the outer ring 13, the hollow channel 21 is connected to the second cavity 112, and the lead wire passes through the hollow channel 21. It can be understood that a seal needs to be provided between the lead wire and the inner wall of the hollow channel 21 to prevent leakage of cooling oil. 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 the gap between the lead wire and the hollow channel 21 can be filled and sealed by a seal.

[0083] See also Figures 4 to 9 In the second embodiment, the first cavity 111 and the second cavity 112 are spaced apart in the axial direction. The following description will be made by taking the first cavity 111 and the second cavity 112 as an example.

[0084] The oil collecting ring 100 includes a first part, a second part and a partition 15. The first part and the second part are connected to both sides of the partition 15 in the axial direction respectively. The partition 15 serves as a partition between the first cavity 111 and the second cavity 112. A first cavity 111 is formed between the first part and the partition 15. A third port 113 is provided on the first part. The third port 113 is connected to the oil passage 1014 on the stator core 1001. A second cavity 112 is formed between the second part and the partition 15. The second part has an opening arranged opposite to the partition 15. The winding 1003 passes through the opening and extends into the second cavity 112. The partition 15 has a connecting port 114 connecting the first cavity 111 and the second cavity 112. The cooling oil enters the first cavity 111 through the oil passage 1014 and the third port 113. The cooling oil in the first cavity 111 enters the second cavity 112 from the connecting port 114, thereby cooling the winding 1003 in the second cavity 112.

[0085] 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 into a first cavity 111 and a second cavity 112 spaced apart in the axial direction by a partition 15, and a connecting port 114 connecting the first cavity 111 and the second cavity 112 is provided on the partition 15, and the oil collecting ring 100 has a third port 113 connected to the first cavity 111, and the oil collecting ring 100 also has an opening connected to the second cavity 112, and the opening is arranged opposite to the partition 15. In this embodiment, two layers of cavities, namely, a first cavity 111 and a second cavity 112 arranged in the axial direction, are formed in the oil collecting ring 100, and the cooling oil in the first cavity 111 enters the second cavity through the connecting port to cool the part of the winding extending into the second cavity and the axial end of the stator core. Since there is no other obstruction on the radial outer side of the second cavity 112 , the radial space of the second cavity 112 is only limited by the size of the internal space of the housing 1002 , and can be suitable for the application environment of the multilayer winding 1003 .

[0086] In addition, the first cavity 111 supplies cooling oil to the second cavity 112 through the connecting port 114. The second cavity 112 is not directly connected to the oil passage 1014 of the stator core 1001. The pressure loss in the first cavity 111 is small, and the cooling oil enters the second cavity 112 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.

[0087] 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.

[0088] In the first example of this implementation mode, Figure 4 and Figure 5 As shown, the first part includes an end plate 14, a first inner ring portion 121 and a first outer ring portion 131. The end plate 14 and the partition plate 15 are axially spaced apart, the first outer ring portion 131 is arranged radially outside the first inner ring portion 121, and the first outer ring portion 131 and the first inner ring portion 121 are both connected between the end plate 14 and the partition plate 15.

[0089] The diameter of the first outer ring portion 131 may be smaller than the diameter of the end plate 14. Figure 4 As shown, the first cavity 111 is surrounded by the end plate 14, the first inner ring 121, the first outer ring 131 and the partition 15, and the first outer ring 131 is provided with a third port 113. The outer edge of the end plate 14 abuts against and seals the inner wall of the housing 1002. Since the diameter of the first outer ring 131 is smaller than the diameter of the end, that is, there is a gap between the first outer ring 131 and the inner wall of the housing 1002 for cooling oil to flow, the third port 113 is provided on the first outer ring 131, so that the cooling oil can flow into the first cavity 111 from the third port 113.

[0090] The diameter of the first outer ring portion 131 may be consistent with the diameter of the end plate 14. Figure 5As shown, the first outer ring portion 131 is connected to the outer edge of the end plate 14, and the end plate 14 and the first outer ring portion 131 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 first cavity 111 is surrounded by the end plate 14, the first inner ring portion 121, the first outer ring portion 131 and the partition 15, and the third port 113 can be opened on the first outer ring portion 131, and the oil passage 1014 on the stator core 1001 and the third port 113 are connected by setting an oil passage on the housing 1002. The third port 113 can also be opened on the partition 15, and the third port 113 is located outside the second outer ring portion 132. It is understandable that the diameter of the second outer ring portion 132 needs to be smaller than the diameter of the end plate 14 , and the cooling oil flows through the channel formed between the second outer ring portion 132 and the inner wall of the casing 1002 and then enters the first cavity 111 through the third port 113 .

[0091] In the second example of this embodiment, Figure 6 As shown, the first part includes an end plate 14 and a first inner ring portion 121. The difference between the second example and the first example is that the first outer ring portion 131 is not provided. The end plate 14, the partition plate 15, the first inner ring portion 121 and the inner wall of the casing 1002 together form a first cavity 111. In this case, an oil passage can be directly provided on the casing 1002 to connect the first cavity 111 and the oil passage 1014 on the stator core 1001.

[0092] When the diameter of the partition 15 is smaller than that of the end plate 14 , a third opening 113 is formed between the edges of the partition 15 and the end plate 14 . When the diameter of the partition 15 is equal to that of the end plate 14 , the third opening 113 is formed on the partition 15 .

[0093] In the third example of this embodiment, Figures 4 to 6 As shown, the second part includes a second inner ring portion 122 and a second outer ring portion 132, and an opening is formed between the second inner ring portion 122 and the second outer ring portion 132. Since there is no other component blocking, the radial distance between the first inner ring portion 121 and the second inner ring portion 122 is the radial size of the second cavity 112, and the space between the first inner ring portion 121 and the second inner ring portion 122 is fully utilized, which is conducive to the multi-layer winding 1003 extending from the opening into the second cavity 112.

[0094] The diameter of the second outer ring portion 132 may be smaller than the diameter of the end plate 14. Figure 5 and Figure 6As shown, in this case, a channel is formed between the second outer ring portion 132 and the housing 1002. According to the oil inlet method of the first cavity 111 in the first part, the cooling oil can enter the first cavity 111 through the channel between the second outer ring portion 132 and the housing 1002, or the first cavity 111 can be connected by setting an oil circuit on the housing 1002.

[0095] The second outer ring portion 132 may be equal to the diameter of the end plate 14. Figure 4 As shown, the end plate 14 and the second outer ring portion 132 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 second outer ring portion 132 forms an oil passage extending in the axial direction on the side away from the second inner ring portion 122. For example, the second outer ring portion 132 can be concave to form an oil passage, and the oil passage is independent of the second cavity 112. The oil passage on the second outer ring portion 132 connects the oil passage 1014 on the stator core 1001 and the first cavity 111. It is also possible to connect the first cavity 111 by setting an oil passage on the housing 1002.

[0096] It can be understood that, in the absence of conflict, the first example and the third example can be combined with each other, and the second example and the third example can also be combined with each other, and this application does not limit this.

[0097] Regardless of combining the first example with the third example or combining the second example with the third example, the oil collecting ring 100 has a first inner ring and a second inner ring, and the first port 115 can be set at different positions according to the size relationship between the first inner ring and the second inner ring.

[0098] 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 first port 115 can be set on the second inner ring portion 122. At this time, the cooling oil enters the second cavity 112 axially from the connecting port 114 on the partition 15, and after exchanging heat with the end of the winding 1003 and the stator core 1001, it flows out radially from the second inner ring portion 122. Compared with straight in and out along the radial direction, the flow path of the cooling oil can be increased, and a turbulent flow is formed in the second cavity 112, which is beneficial to contact and heat exchange with the winding 1003 and the stator core 1001.

[0099] When the diameter of the first inner ring portion 121 is smaller than the diameter of the second inner ring portion 122, the inner ring portion 12 is a stepped structure, the inner edge of the partition 15 is connected to the second outer ring portion 132, 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 first port 115 can be set on the second inner ring portion 122, 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 first port 115 can also be set on the partition 15, located between the first inner ring portion 121 and the second inner ring portion 122, as shown in FIG. Figure 8 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 first outer ring portion 131, 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 first inner ring portion 121, and the inner edge of the second ring portion 152 is connected to the second inner ring portion 122; and the second ring portion 152 is provided with a first port 115 connected to the second cavity 112. Therefore, the cooling oil in the second cavity 112 flows out from the first port 115 in the axial direction, and the cooling oil flows out from the first port 115 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.

[0100] The first outer ring 131 may be a complete annular structure, that is, in a cross section perpendicular to the central axis of the oil collecting ring 100, the first outer ring 131 is annular. When no other components are arranged on the inner wall of the housing 1002, an annular first outer ring 131 may be selected to match the cross-sectional shape of the first outer ring 131 with the housing 1002, thereby keeping the first outer ring 131 in close contact with the inner wall of the housing 1002 or forming a gap of equal diameter. The first outer ring may be formed by connecting two or more rings of different diameters, such as Fig.10 As shown, the first outer ring portion 131 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 first outer ring portion 131 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 first outer ring portion 131.

[0101] Similar to the first outer ring portion 131, the second outer ring portion 132 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 second outer ring portion 132 is annular, or the second outer ring portion 132 includes at least two arc segments connected end to end and having different diameters. This application will not further describe this in detail.

[0102] 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.

[0103] See also Figures 11 to 14 In some embodiments, the oil collecting ring 100 further includes a connector 20, which has a hollow channel 21; the oil collecting ring 100 has a variety of installation methods. Regardless of which installation method is used, the lead wire passes 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, so that the lead wire can pass through, and it can be filled and sealed by the seal.

[0104] Specifically, the connector 20 can be connected to the end plate 14, the hollow channel 21 is connected to the first cavity 111, and the partition plate 15 is provided with a wire hole corresponding to the hollow channel 21. Fig.11 and Fig.12 As shown, the lead wire passes through the wire hole, passes through the first cavity 111 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 to allow cooling oil to enter the second cavity from the first cavity.

[0105] 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 second cavity 112. Fig.13 As shown, the connector 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 .

[0106] The connecting member 20 can also be connected to the second outer ring portion 132, and the hollow channel 21 is connected to the second cavity 112. Fig.14 As shown, the connection member 20 and the second outer ring portion 132 are sealed, specifically by means of sealant, welding, etc., and the lead wire is bent and directly passes through the hollow channel 21.

[0107] 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 of the first embodiment or the second 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 can adopt a radial double-layer structure, and the other oil collecting ring 100 can adopt a single-layer structure, a radial double-layer structure, or an axial double-layer structure; or, 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.

[0108] 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.

[0109] 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 arranged at intervals, and the oil collecting ring has a connecting port, which connects the first cavity and the second cavity; the second cavity is used to accommodate the winding of the motor to pass through; the oil collecting ring also has a plurality of first ports connected to the second cavity.

2. The oil collecting ring according to claim 1, characterized in that: The first port is configured such that the medium in the second cavity can be discharged through the first port when the medium pressure is greater than a first predetermined value.

3. The oil collecting ring according to claim 1 or 2, characterized in that: The oil collecting ring also has a second port communicating with the second cavity; The second port is configured such that the medium in the second cavity can be discharged through the second port when the medium reaches a predetermined height; and / or the second port is configured such that the medium in the second cavity can be discharged through the second port when the pressure is greater than a second predetermined value.

4. The oil collecting ring according to claim 3, characterized in that: The cross-sectional area of ​​the second port is greater than or equal to 15 mm 2 .

5. The oil collecting ring according to claim 1, characterized in that: The oil collecting ring is formed with a third port communicating with the first cavity, or the oil collecting ring is suitable for forming the third port communicating with the housing of the motor.

6. The oil collecting ring according to claim 1, characterized in that: There are multiple communication ports, and the communication ports are configured such that when the pressure of the medium in the first cavity is greater than a threshold, the medium can enter the second cavity through the communication ports.

7. The oil collecting ring according to claim 1, characterized in that: The cross-sectional area of ​​the first port is 0.7 mm 2 Up to 13mm 2 .

8. The oil collecting ring according to claim 1, characterized in that: The oil collecting ring includes an inner ring portion, an outer ring portion and an end plate, the inner ring portion and the outer ring portion are connected to the same side of the end plate, and the outer ring portion is arranged on the radial outside of the inner ring portion; the first cavity is formed on the side of the outer ring portion away from the inner ring portion, the second cavity is formed between the outer ring portion and the inner ring portion, and the connecting port is opened on the outer ring portion.

9. The oil collecting ring according to claim 8, characterized in that: The plurality of communication ports are divided into a plurality of groups, each group of the communication ports includes a plurality of communication ports, the plurality of communication ports in each group are arranged at intervals along the circumferential direction of the outer ring portion, and the communication ports in each group are arranged at intervals along the axial direction of the oil collecting ring.

10. The oil collecting ring according to claim 9, characterized in that: Two adjacent groups of the communication ports are staggered; or multiple groups of the communication ports are aligned along the axial direction of the oil collecting ring.

11. The oil collecting ring according to claim 8, characterized in that: The first port is provided on the inner ring portion or the end plate.

12. The oil collecting ring according to any one of claims 8 to 11, characterized in that: The oil collecting ring further includes a connecting piece, which is connected to one of the end plate and the outer ring portion; the connecting piece has a hollow channel, and the hollow channel is communicated with the second cavity.

13. The oil collecting ring according to claim 1, characterized in that: The oil collecting ring includes an inner ring portion, an outer ring portion, an end plate and a partition plate. The outer ring portion is arranged at the radial outer periphery of the inner ring portion. The end plate and the partition plate are both connected between the inner ring portion and the outer ring portion, and the end plate and the partition plate are arranged at intervals along the axial direction of the oil collecting ring. The first cavity is formed between the end plate and the partition plate, and the second cavity is formed on the side of the partition plate away from the end plate. The connecting port is opened on the partition plate.

14. The oil collecting ring according to claim 13, characterized in that: The first port is provided in the inner ring portion.

15. The oil collecting ring according to claim 13, characterized in that: The partition plate divides the inner ring portion into a first inner ring portion and a second inner ring portion, wherein the first inner ring portion is connected between the end plate and the partition plate, and the second inner ring portion is arranged on a side of the partition plate away from the end plate; The partition includes a first ring portion and a second ring portion, wherein the outer edge of the first ring portion is connected to the outer ring portion, and the inner edge of the first ring portion is connected to the first inner ring portion; the outer edge of the second ring portion is connected to the first inner ring portion, and the inner edge of the second ring portion is connected to the second inner ring portion; and the second ring portion is provided with a first port connected to the second cavity.

16. The oil collecting ring according to any one of claims 13 to 15, characterized in that: The oil collecting ring further comprises a connecting piece, wherein the connecting piece has a hollow passage; the connecting piece is connected to the end plate, the hollow passage is communicated with the first cavity, and a wire hole corresponding to the hollow passage is formed on the partition plate.

17. The oil collecting ring according to any one of claims 13 to 15, characterized in that: The oil collecting ring further includes a connecting piece having a hollow passage; the connecting piece passes through the end plate and is connected to the partition plate, and the hollow passage is in communication with the second cavity.

18. The oil collecting ring according to any one of claims 13 to 15, characterized in that: The oil collecting ring further includes a connecting piece having a hollow passage; the connecting piece is connected to the outer ring portion, and the hollow passage is communicated with the second cavity.

19. The oil collecting ring according to any one of claims 13 to 15, characterized in that: In a cross section perpendicular to the central axis of the oil collecting ring, the outer ring portion is in the shape of a circular ring, or the outer ring portion includes at least two arc segments connected end to end and having different diameters.

20. 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 19, wherein the oil collecting ring is arranged at an end portion of the stator core along an axial direction.

21. An electric assembly, characterized in that: The electric powertrain comprises the electric machine according to claim 20 .

22. A vehicle, characterized in that: The vehicle comprises the electric machine according to claim 20 or the electric powertrain according to claim 21 .

Images