Rotor assembly, motor and vehicle
By designing multiple oil channels and oil holes in the motor rotor assembly and setting through oil channels on the rotor body, the problem of uneven cooling of the motor rotor is solved, and a more efficient cooling effect is achieved.
Patent Information
- Application Number
- CN202421345406.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-13
- Publication Date
- 2025-03-28
- Estimated Expiration
- 2034-06-13
AI Technical Summary
The existing motor rotor cooling method results in uneven cooling and affects efficiency.
A rotor assembly is designed, by setting a plurality of oil passages and oil holes on the rotor shaft, setting an oil passage on the pressure plate, and setting an oil passage through the rotor body, so that cooling oil can flow out from both ends of the rotor body, achieving uniform cooling.
The uniform cooling of the motor rotor body is achieved, the cooling effect is improved, and the stable operation of the rotor body is ensured.
Smart Images
Figure CN222691461U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of vehicles, and in particular to a rotor assembly, a motor and a vehicle. Background Art
[0002] Drive motors are the main power source for electric vehicles. With the rapid development of electric vehicle technology, drive motors are gradually showing a trend of high speed, high efficiency and high power density. As the power density requirements for drive motors become higher and higher, the heat dissipation of motors has also attracted much attention.
[0003] At present, cooling oil is usually used to cool the stator and rotor of the motor, wherein the following two cooling methods are usually used for the motor rotor: the first method is that the cooling oil flows from one end of the rotor shaft into the gap between the rotor shaft and the output shaft, circulates inside the rotor shaft once and then flows out; the second method is that the cooling oil flows from one end of the rotor shaft into the gap between the rotor shaft and the output shaft, flows from one end of the rotor body into the oil channel on the rotor body through the oil channel on the rotor pressure plate, and then flows out from the other end of the rotor body. However, the first cooling method does not allow the cooling oil to pass through the rotor body, but takes away the heat of the rotor body through heat exchange with the rotor shaft, resulting in poor cooling effect. Although the second cooling method directly contacts the cooling oil with the rotor body, which improves the heat exchange effect, the cooling oil has inconsistent cooling effects on both ends of the rotor body due to the continuous increase in temperature during the process of the cooling oil flowing from one end of the rotor body to the other end, resulting in uneven cooling of the rotor body. Utility Model Content
[0004] The problem solved by the utility model is: how to evenly cool the rotor body of the motor while ensuring the cooling effect.
[0005] In order to solve the above problems, the utility model provides a rotor assembly, a motor and a vehicle.
[0006] In a first aspect, the utility model provides a rotor assembly, comprising a rotor body, a pressure plate and a hollow rotor shaft, wherein the rotor body and the pressure plate are respectively sleeved on the rotor shaft, and the pressure plates are located at two ends of the rotor body along the axial direction;
[0007] The rotor shaft is provided with a first oil passage, a second oil passage, a first oil hole and a second oil hole, and the oil outlet ends of the first oil passage and the second oil passage are respectively connected with the first oil hole and the second oil hole;
[0008] The rotor body is provided with a fourth oil passage and a fifth oil passage, the oil inlet end of the fourth oil passage and the oil outlet end of the fifth oil passage are located at one end of the rotor body in the axial direction, and the oil outlet end of the fourth oil passage and the oil inlet end of the fifth oil passage are located at the other end of the rotor body in the axial direction;
[0009] A third oil passage is provided on the pressure plate, and the oil outlet end and the oil inlet end of the third oil passage on the pressure plate located at one end of the rotor body are respectively connected to the oil inlet end of the fourth oil passage and the first oil hole, and the oil outlet end and the oil inlet end of the third oil passage on the pressure plate located at the other end of the rotor body are respectively connected to the oil inlet end of the fifth oil passage and the second oil hole.
[0010] Optionally, a third oil hole is also provided on the pressure plate, and the third oil hole penetrates the pressure plate axially, and the third oil hole on the pressure plate located at one end of the rotor body is connected to the oil outlet end of the fifth oil channel, and the third oil hole on the pressure plate located at the other end of the rotor body is connected to the oil outlet end of the fourth oil channel.
[0011] Optionally, the inner wall of the rotor shaft is provided with a first groove and a second groove extending in the axial direction, the first groove constitutes the first oil channel, and the second groove constitutes the second oil channel.
[0012] Optionally, the oil inlet ends of the first oil passage and the second oil passage are both located on an end surface of one end of the rotor shaft.
[0013] Optionally, the first oil passages and the second oil passages are alternately arranged along the circumferential direction of the rotor shaft.
[0014] Optionally, a third groove is provided on the end surface of the pressure plate facing the rotor body, and the third groove is extended along the radial direction of the pressure plate to form the third oil channel.
[0015] Optionally, the third oil passages and the third oil holes are alternately arranged along the circumference of the pressure plate.
[0016] Optionally, the third oil channel includes a first channel and a second channel connected to each other, the oil inlet end of the first channel is connected to the first oil hole or the second oil hole, the second channel is arranged opposite to and connected to the oil inlet end of the fourth oil channel or the fifth oil channel, and the size of the second channel in a set direction is larger than the size of the first channel in the set direction, wherein the set direction is parallel to the pressure plate and perpendicular to the extension direction of the third oil channel.
[0017] In a second aspect, the utility model provides a motor, comprising the rotor assembly as described above.
[0018] In a third aspect, the utility model provides a vehicle, comprising the rotor assembly as described above, or comprising the motor as described above.
[0019] The beneficial effect of the motor rotor assembly of the utility model is that the first oil passage, the second oil passage, the first oil hole and the second oil hole can be arranged on the rotor shaft, the third oil passage can be arranged on the pressure plate, the fourth oil passage and the fifth oil passage which penetrate the rotor body can be arranged on the rotor body, and the oil outlet ends of the first oil passage and the second oil passage can be communicated with the first oil hole and the second oil hole respectively, and at the same time, the oil outlet end and the oil inlet end of the third oil passage on the pressure plate at one end of the rotor body can be communicated with the oil inlet end of the fourth oil passage and the first oil hole respectively, and the oil outlet end and the oil inlet end of the third oil passage on the pressure plate at the other end of the rotor body can be communicated with the oil outlet end and the second oil hole respectively, so that when the rotor assembly is cooled by the cooling oil, Part of the cooling oil flows to the first oil hole under the guidance of the first oil channel, and enters the fourth oil channel from one end of the rotor body through the third oil channel on the pressure plate at one end of the rotor body, and flows out from the other end of the rotor body after heat exchange with the rotor body; another part of the cooling oil flows to the second oil hole under the guidance of the second channel, and enters the fifth oil channel from the other end of the rotor body through the third oil channel on the pressure plate at the other end of the rotor body, and flows out from one end of the rotor body after heat exchange with the rotor body, so that the cooling oil can flow from the axial ends of the rotor body to the other end respectively, so as to realize cooling of the rotor body from both ends of the rotor body, which not only has a good cooling effect, but also can ensure uniform cooling of the rotor body. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 This is a schematic diagram of the structure of the rotor assembly in the embodiment of the utility model;
[0021] Figure 2 for Figure 1 Schematic diagram of the cross-section at AA in the middle;
[0022] Figure 3 for Figure 1 Schematic diagram of the cross section at the middle BB;
[0023] Figure 4 It is a cross-sectional schematic diagram of the rotor assembly in the embodiment of the utility model;
[0024] Figure 5 It is a schematic cross-sectional view of the rotor assembly at the pressure plate in an embodiment of the utility model.
[0025] Description of reference numerals:
[0026] 1. Rotor body; 11. Fourth oil passage; 12. Fifth oil passage; 2. Pressure plate; 2a. Left pressure plate; 2b. Right pressure plate; 21. Third oil passage; 211. First passage; 212. Second passage; 22. Third oil hole; 3. Rotor shaft; 31. First oil passage; 32. Second oil passage; 33. First oil hole; 34. Second oil hole; 100. Output shaft. DETAILED DESCRIPTION
[0027] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific embodiments of the utility model are described in detail below in conjunction with the accompanying drawings. Although some embodiments of the utility model are shown in the accompanying drawings, it should be understood that the utility model can be implemented in various forms and should not be interpreted as being limited to the embodiments described here. On the contrary, these embodiments are provided to more thoroughly and completely understand the utility model. It should be understood that the drawings and embodiments of the utility model are only for exemplary purposes and are not used to limit the scope of protection of the utility model.
[0028] The Y axis in the drawings represents the left and right positions, and the positive direction of the Y axis represents the left side, and the reverse direction of the Y axis represents the right side. It should also be noted that the aforementioned Y axis is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention.
[0029] The term "including" and its variations used in this article are open inclusions, that is, "including but not limited to"; the term "based on" means "based at least in part on"; the term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one other embodiment"; the term "some embodiments" means "at least some embodiments"; the term "optionally" means "optional embodiments". The relevant definitions of other terms will be given in the following description. It should be noted that the concepts of "first", "second", etc. mentioned in the present utility model are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.
[0030] It should be noted that the modifications of "one" and "plurality" mentioned in the present invention are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise clearly indicated in the context, it should be understood as "one or more".
[0031] In the related art, the motor rotor mainly includes a rotor shaft, a rotor body and two rotor pressure plates, the rotor body and the two rotor pressure plates are respectively sleeved on the rotor shaft, and the rotor body is sandwiched between the two rotor pressure plates. When the motor rotor is assembled with the output shaft, the rotor shaft is sleeved on the output shaft, and a clearance fit is formed between the rotor shaft and the output shaft. After the cooling oil flows into the gap between the rotor shaft and the output shaft from one end of the rotor shaft, it flows into the oil channel on the rotor pressure plate through the radial oil hole on the rotor shaft, then enters the oil channel on the rotor body from one end of the rotor body, and finally flows out from the other end of the rotor body to achieve cooling of the motor rotor. However, since the cooling oil continuously exchanges heat with the rotor body in the process of flowing from one end of the rotor body to the other end, the temperature of the cooling oil continuously rises in the process of flowing from one end of the rotor body to the other end, making the cooling effect of the cooling oil on both ends of the rotor body inconsistent, thereby causing uneven cooling of the rotor body.
[0032] In view of the problems existing in the above-mentioned related technologies, the utility model provides a rotor assembly, a motor and a vehicle.
[0033] Combination Figures 1 to 4 As shown, a rotor assembly provided by an embodiment of the utility model comprises a rotor body 1, a pressure plate 2 and a hollow rotor shaft 3, wherein the rotor body 1 and the pressure plate 2 are respectively sleeved on the rotor shaft 3, and the pressure plate 2 is located at both ends of the rotor body 1 along the axial direction; the rotor shaft 3 is provided with a first oil passage 31, a second oil passage 32, a first oil hole 33 and a second oil hole 34, and the oil outlet ends of the first oil passage 31 and the second oil passage 32 are respectively connected with the first oil hole 33 and the second oil hole 34; the rotor body 1 is provided with a fourth oil passage 11 and a fifth oil passage 12, and the inlet of the fourth oil passage 11 The oil end and the oil outlet end of the fifth oil channel 12 are located at one end of the rotor body 1 in the axial direction, and the oil outlet end of the fourth oil channel 11 and the oil inlet end of the fifth oil channel 12 are located at the other end of the rotor body 1 in the axial direction; a third oil channel 21 is provided on the pressure plate 2, and the oil outlet end and the oil inlet end of the third oil channel 21 on the pressure plate 2 located at one end of the rotor body 1 are respectively connected with the oil inlet end of the fourth oil channel 11 and the first oil hole 33, and the oil outlet end and the oil inlet end of the third oil channel 21 on the pressure plate 2 located at the other end of the rotor body 1 are respectively connected with the oil outlet end of the fifth oil channel 12 and the second oil hole 34.
[0034] Specifically, the rotor shaft 3 of the rotor assembly is usually a hollow shaft structure with open ends. During assembly, the output shaft 100 is inserted into the rotor shaft 3 to sleeve the rotor assembly on the output shaft, and a clearance fit is formed between the output shaft 100 and the rotor shaft 3 to provide a storage space for the cooling oil. A pressure plate 2 is provided at each of the axial ends of the rotor body 1 (i.e., the two ends of the rotor body 1 in the Y-axis direction, which are also the left and right ends of the rotor body 1). For the convenience of description, the pressure plate 2 located at the left end of the rotor body 1 is called the left pressure plate 2a, and the pressure plate 2 located at the right end of the rotor body 1 is called the right pressure plate 2b. During assembly, the right pressure plate 2b, the rotor body 1, and the left pressure plate 2a can be sleeved on the rotor shaft 3 in sequence to achieve assembly of the rotor assembly.
[0035] More specifically, cooling oil channels are provided on the rotor body 1, the pressure plate 2 and the rotor shaft 3, wherein the cooling oil channels on the rotor body 1, namely the fourth oil channel 11 and the fifth oil channel 12, usually run through the entire rotor body 1, wherein the fourth oil channel 11 and the fifth oil channel 12 can be a linear channel structure extending along the axial direction of the rotor body 1, or can be a roughly curved channel structure, and can be selected and designed according to the specific structure of the rotor body 1 in actual application. The cooling oil channel on the pressure plate 2, namely the third oil channel 21, can be a channel structure provided inside the plate body of the pressure plate 2, in which case the third oil channel 21 is located between the two end faces of the pressure plate 2 along the axial direction, namely between the left end face and the right end face of the pressure plate 2, and the third oil channel 21 can also be a groove structure provided on the end face of the pressure plate 2 facing the rotor body 1, which is not specifically limited here. The cooling oil passages on the rotor shaft 3, i.e., the first oil passages 31 and the second oil passages 32, may be channel structures arranged inside the shaft body of the rotor shaft 3. In this case, the first oil passages 31 and the second oil passages 32 are located between the inner wall and the outer wall of the rotor shaft 3. They may also be groove structures arranged on the inner wall of the rotor shaft 3, which are not specifically limited here. In addition, the first oil passages 31 and the second oil passages 32 may be arranged to extend along the axial direction of the rotor shaft 3, and may extend in a straight line or in a spiral curve. Moreover, the rotor shaft 3 is also provided with oil outlet holes, i.e., the first oil hole 33 and the second oil hole 34, which are usually arranged along the radial direction of the rotor shaft 3 or slightly inclined relative to the radial direction, and connect the internal space and the external space of the rotor shaft 3, and the number of the first oil passages 31 and the first oil holes 33 is the same, the number of the second oil passages 32 and the second oil holes 34 is the same, and one first oil passage 31 is only connected to one first oil hole 33, and one second oil passage 32 is only connected to one second oil hole 34. The cooling oil channel on the left pressure plate 2a is recorded as the third oil channel 21a, and the cooling oil channel on the right pressure plate 2b is recorded as the third oil channel 21b. When the structures of the left pressure plate 2a and the right pressure plate 2b are the same, the numbers of the first oil channel 31, the second oil channel 32, the first oil hole 33, the second oil hole 34, the third oil channel 21a, the third oil channel 21b, the fourth oil channel 11 and the fifth oil channel 12 are all the same; when the structures of the left pressure plate 2a and the right pressure plate 2b are different, the numbers of the first oil channel 31, the first oil hole 33, the third oil channel 21a, and the fourth oil channel 11 are the same, and the numbers of the second oil channel 32, the second oil hole 34, the third oil channel 21b and the fifth oil channel 12 are the same. For the convenience of description, the following text takes the cooling oil channel on the left pressure plate 2a and the right pressure plate 2b as the third oil channel 21 as an example. The oil inlet ends of the first oil passage 31 and the second oil passage 32 may be located inside the rotor shaft 3. In this case, the oil inlet ends of the first oil passage 31 and the second oil passage 32 are respectively connected to the gap between the output shaft 100 and the rotor shaft 3. They may also be located at the ends of the rotor shaft 3. Figure 3As shown, at this time, the oil inlet ends of the first oil passage 31 and the second oil passage 32 are respectively connected to the external space of the rotor shaft 3, which is not specifically limited here. The oil outlet end of the first oil passage 31 is usually connected to the first oil hole 33, and the oil outlet end of the second oil passage 32 is usually connected to the second oil hole 34. At the same time, the oil outlet end and the oil inlet end of the third oil passage 21 on the left pressure plate 2a are respectively connected to the oil inlet end of the fourth oil passage 11 and the first oil hole 33, and the oil outlet end and the oil inlet end of the third oil passage 21 on the right pressure plate 2b are respectively connected to the oil inlet end of the fifth oil passage 12 and the second oil hole 34. That is to say, after the rotor assembly is assembled, the first oil channel 31 is connected to the oil inlet end of the third oil channel 21 on the left pressure plate 2a through the first oil hole 33, the oil outlet end of the third oil channel 21 on the left pressure plate 2a is connected to the oil inlet end of the fourth oil channel 11 on the rotor body 1, the second oil channel 32 is connected to the oil inlet end of the third oil channel 21 on the right pressure plate 2b through the second oil hole 34, and the oil outlet end of the third oil channel 21 on the right pressure plate 2b is connected to the oil inlet end of the fifth oil channel 12 on the rotor body 1.
[0036] like Figure 4 As shown ( Figure 4 The solid black thick arrow in the middle represents the flow direction of the cooling oil). When the cooling oil is used to cool the rotor assembly, the cooling oil usually flows into the rotor shaft 3 from the left end of the rotor shaft 3. A part of the cooling oil flowing into the rotor shaft 3 flows into the first oil channel 31 and the second oil channel 32, and the other part flows through the gap between the output shaft 100 and the rotor shaft 3 to other parts that need to be cooled. The cooling oil flowing into the first oil channel 31 flows to the first oil hole 33 under the guidance of the first oil channel 31, and enters the fourth oil channel 11 from the left end of the rotor body 1 through the third oil channel 21 on the left pressure plate 2a, exchanges heat with the rotor body 1 to take away the heat of the rotor body 1, and then flows out from the right end of the rotor body 1; the cooling oil flowing into the second oil channel 32 flows to the second oil hole 34 under the guidance of the second oil channel 32, and enters the fifth oil channel 12 from the right end of the rotor body 1 through the third oil channel 21 on the right pressure plate 2b, exchanges heat with the rotor body 1 to take away the heat of the rotor body 1, and then flows out from the left end of the rotor body 1, so as to realize the cooling of the rotor body 1 from both axial ends of the rotor body 1.
[0037] The rotor assembly in this embodiment can be provided with a first oil passage 31, a second oil passage 32, a first oil hole 33 and a second oil hole 34 on the rotor shaft 3, a third oil passage 21 on the pressure plate 2, and a fourth oil passage 11 and a fifth oil passage 12 penetrating the rotor body 1 on the rotor body 1, and the oil outlet ends of the first oil passage 31 and the second oil passage 32 are respectively communicated with the first oil hole 33 and the second oil hole 34, and at the same time, the oil outlet end and the oil inlet end of the third oil passage 21 on the pressure plate 2 at one end of the rotor body 1 are respectively communicated with the oil inlet end of the fourth oil passage 11 and the first oil hole 33, and the oil outlet end and the oil inlet end of the third oil passage 21 on the pressure plate 2 at the other end of the rotor body 1 are respectively communicated with the oil outlet end of the fifth oil passage 12 and the second oil hole 34. In this way, when the rotor assembly is cooled by cooling oil, A portion of the cooling oil flows to the first oil hole 33 under the guidance of the first oil passage 31, and enters the fourth oil passage 11 from one end of the rotor body 1 through the third oil passage 21 on the pressure plate 2 at one end of the rotor body 1, and flows out from the other end of the rotor body 1 after heat exchange with the rotor body 1; another portion of the cooling oil flows to the second oil hole 34 under the guidance of the second oil passage 32, and enters the fifth oil passage 12 from the other end of the rotor body 1 through the third oil passage 21 on the pressure plate 2 at the other end of the rotor body 1, and flows out from one end of the rotor body 1 after heat exchange with the rotor body 1, so that the cooling oil can flow from the axial ends of the rotor body 1 to the other end respectively, so as to realize cooling of the rotor body 1 from both ends of the rotor body 1, which not only has a good cooling effect, but also can ensure uniform cooling of the rotor body 1.
[0038] Furthermore, the first oil passage 31 and the second oil passage 32 are respectively extended along the axial direction of the rotor shaft 3 .
[0039] In this optional embodiment, both the first oil passage 31 and the second oil passage 32 are linear channel structures, and the extension lengths of the two are different. In this way, the first oil passage 31 and the second oil passage 32 are extended along the axial direction of the rotor shaft 3, which is convenient for processing and manufacturing on the one hand, and can reduce the influence of the rotor rotation direction on the cooling oil in the first oil passage 31 and the second oil passage 32 during the flow process, thereby further ensuring that the cooling oil at both ends of the rotor body 1 is evenly distributed.
[0040] Optionally, combined Figure 2 , Figure 3 and Figure 5 As shown, a third oil hole 22 is also provided on the pressure plate 2, and the third oil hole 22 penetrates the pressure plate 2 axially, and the third oil hole 22 on the pressure plate 2 at one end of the rotor body 1 is connected to the oil outlet end of the fifth oil channel 12, and the third oil hole 22 on the pressure plate 2 at the other end of the rotor body 1 is connected to the oil outlet end of the fourth oil channel 11.
[0041] In this optional embodiment, the pressure plate 2 is usually an annular structure, and the third oil hole 22 is a through hole structure that penetrates the pressure plate 2 along the axial direction of the pressure plate 2. The through hole structure can be a geometric shape such as a circle, a square or an ellipse, and can be selected and designed according to needs in actual applications. Moreover, the third oil hole 22 on the left pressure plate 2a corresponds to the position of the fifth oil passage 12 of the rotor body 1 and is interconnected, and the third oil hole 22 on the right pressure plate 2b corresponds to the position of the fourth oil passage 11 of the rotor body 1 and is interconnected. In this way, the cooling oil flowing from the third oil passage 21 of the left pressure plate 2a into the fourth oil passage 11 can flow out of the rotor assembly from the third oil hole 22 of the right pressure plate 2b after heat exchange with the rotor body 1, and the cooling oil flowing from the third oil passage 21 of the right pressure plate 2b into the fifth oil passage 12 can flow out of the rotor assembly from the third oil hole 22 of the left pressure plate 2a after heat exchange with the rotor body 1, so that the cooling oil can be recycled or flow to other parts that need to be cooled.
[0042] Optionally, combined Figure 2 and Figure 3 As shown, the inner wall of the rotor shaft 3 is provided with a first groove and a second groove extending in the axial direction, the first groove constitutes a first oil passage 31 , and the second groove constitutes a second oil passage 32 .
[0043] Specifically, the oil inlet ends of the first groove and the second groove are located at, for example, the left end of the rotor shaft 3, and the oil outlet ends of the first groove and the second groove extend along the axial direction of the rotor shaft 3 to the first oil hole 33 corresponding to the position of the left pressure plate 2a and the second oil hole 34 corresponding to the position of the right pressure plate 2b, respectively, that is, the length of the first groove is smaller than the length of the second groove. The cross-sectional area (i.e., the cross-sectional area perpendicular to the extending direction of the groove) of the first groove and the second groove can be designed according to the amount of cooling oil flowing into the rotor shaft 3. For example, if the amount of oil is large, the cross-sectional area of the rotor groove can be increased, for example, the depth of the groove is set larger, or the width of the groove is set larger. If the amount of oil is small, the cross-sectional area of the rotor groove can be reduced, for example, the depth of the groove is set smaller, or the width of the groove is set smaller.
[0044] In this optional embodiment, the first oil passage 31 and the second oil passage 32 are formed by machining grooves on the inner wall of the rotor shaft 3, which not only simplifies the structure of the rotor shaft 3, thereby reducing the difficulty of machining and improving production efficiency, but also enables the first oil passage 31 and the second oil passage 32 to have a larger communicating area with the internal space of the rotor shaft 3. In this way, when the cooling oil flows from one end of the rotor shaft 3 into the gap between the output shaft 100 and the rotor shaft 3, the cooling oil can be thrown into the first oil passage 31 and the second oil passage 32 under the action of centrifugal force, and cling to the inner walls of the first oil passage 31 and the second oil passage 32, so that the cooling oil can be cooled and cooled. Under the guidance of the inner wall of the oil channel, the oil flows to the oil outlet hole and enters the oil inlet end of the third oil channel 21 of the corresponding pressure plate 2, thereby ensuring that each third oil channel 21 of the pressure plate 2 at both ends of the rotor body 1 can enter a certain flow of cooling oil, so that the oil distribution of the cooling oil at both ends of the rotor body 1 is not easily affected by the motor speed and rotation direction, thereby ensuring that the oil amount of cooling oil at both ends of the rotor body 1 can meet the cooling requirements of the motor under different working conditions such as forward rotation, reverse rotation, high speed, and low speed. At the same time, it is also convenient for the motor cooling system to accurately design the oil distribution of the cooling oil to ensure the stable operation of the motor cooling system.
[0045] Optionally, combined Figure 2 , Figure 3 and Figure 4 As shown, the oil inlet ends of the first oil passage 31 and the second oil passage 32 are both located on the end surface of one end of the rotor shaft 3 .
[0046] In this optional embodiment, taking the cooling oil flowing in from the left end of the rotor shaft 3 as an example, the oil inlet ends of the first oil passage 31 and the second oil passage 32 are both located on the end surface of the left end of the rotor shaft 3. In this way, it is not only convenient for processing and manufacturing, but also when the cooling oil flows into the rotor shaft 3 from one end of the rotor shaft 3, the cooling oil can be immediately distributed to the first oil passage 31 and the second oil passage 32 for cooling, thereby improving the cooling efficiency.
[0047] Optionally, the first oil passages 31 and the second oil passages 32 are alternately arranged along the circumferential direction of the rotor shaft 3 .
[0048] In this optional embodiment, the first oil passage 31 and the second oil passage 32 are each provided with a plurality, for example, four, and the four first oil passages 31 and the four second oil passages 32 are alternately arranged along the circumference of the rotor shaft 3. In practical applications, a specific number of first oil passages 31 and second oil passages 32 can be designed according to the oil volume distribution of the cooling oil, which is not specifically limited here. In this way, the amount of cooling oil at both ends of the rotor body 1 is increased by providing a plurality of first oil passages 31 and a plurality of second oil passages 32 to meet the cooling requirements. At the same time, the plurality of first oil passages 31 and the plurality of second oil passages 32 are alternately arranged along the circumference of the rotor shaft 3 to ensure that the cooling oil flowing into the two ends of the rotor body 1 is relatively uniform, so that the rotor body 1 can be evenly cooled.
[0049] Optionally, combined Figure 5 As shown, the third oil passages 21 and the third oil holes 22 are alternately arranged along the circumferential direction of the pressure plate 2 .
[0050] In this optional embodiment, the third oil passages 21 and the third oil holes 22 are each provided in plurality, for example, four are each provided, and the four third oil passages 21 and the four third oil holes 22 are alternately arranged along the circumference of the pressure plate 2. In practical applications, a specific number of third oil passages 21 and third oil holes 22 can be designed according to the oil volume distribution of the cooling oil, which is not specifically limited here. In this way, the amount of cooling oil at both ends of the rotor body 1 is increased by providing a plurality of third oil passages 21 and a plurality of third oil holes 22 to meet the cooling requirements. At the same time, the plurality of third oil passages 21 and the plurality of third oil holes 22 are alternately arranged along the circumference of the pressure plate 2, and accordingly, the fourth oil passages 11 and the fifth oil passages 12 are also alternately arranged along the circumference of the rotor body 1 to ensure that the cooling oil flowing into the two ends of the rotor body 1 can evenly cool the rotor body 1.
[0051] Optionally, a third groove is provided on the end surface of the pressure plate 2 facing the rotor body 1 , and the third groove is extended along the radial direction of the pressure plate 2 to form a third oil passage 21 .
[0052] In this optional embodiment, the third oil passage 21 is a third groove on the end surface of the pressing plate 2 facing the rotor body 1, and the oil inlet end of the third groove is located at the radial inner end of the pressing plate 2, and the oil outlet end of the third groove is connected to the fourth oil passage 11 or the fifth oil passage 12 on the rotor body 1. In this way, the third oil passage 21 is formed by machining a groove on the end surface of the pressing plate 2 facing the rotor body 1, so as to simplify the structure of the pressing plate 2, thereby reducing the difficulty of machining and improving production efficiency.
[0053] Optionally, combined Figure 5 As shown, the third oil channel 21 includes a first channel 211 and a second channel 212 which are interconnected, the oil inlet end of the first channel 211 is connected to the first oil hole 33 or the second oil hole 34, the second channel 212 is arranged opposite to and connected to the oil inlet end of the fourth oil channel 11 or the fifth oil channel 12, and the size of the second channel 212 in a set direction is larger than the size of the first channel 211 in the set direction, wherein the set direction is parallel to the pressure plate 2 and perpendicular to the extension direction of the third oil channel 21.
[0054] It should be noted that the dimension of the second channel 212 in the set direction may also be referred to as the width dimension of the second channel 212 , and correspondingly, the dimension of the first channel 211 in the set direction may also be referred to as the width dimension of the first channel 211 .
[0055] In this optional embodiment, the third oil channel 21 is formed by connecting two channel structures, namely the first channel 211 and the second channel 212, and the width of the second channel 212 is greater than the width of the first channel 211. Such a setting can increase the cross-sectional area of the second channel 212, so as to increase the oil intake at both ends of the rotor body 1 and improve the cooling effect.
[0056] An embodiment of the utility model provides a motor, comprising the rotor assembly as described above.
[0057] The beneficial effects of the motor of this embodiment relative to the prior art are the same as those of the above-mentioned rotor assembly and will not be described in detail here.
[0058] A vehicle provided by an embodiment of the utility model includes the rotor assembly as described above, or includes the motor as described above.
[0059] The beneficial effects of the vehicle of this embodiment relative to the prior art are the same as those of the above-mentioned rotor assembly and will not be described in detail here.
[0060] Although the utility model is disclosed as above, the protection scope of the utility model is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the utility model, and these changes and modifications will fall within the protection scope of the utility model.
Claims
1. A rotor assembly, characterized in that: The invention comprises a rotor body (1), a pressure plate (2) and a hollow rotor shaft (3), wherein the rotor body (1) and the pressure plate (2) are respectively sleeved on the rotor shaft (3), and the pressure plate (2) is located at two ends of the rotor body (1) along the axial direction; The rotor shaft (3) is provided with a first oil passage (31), a second oil passage (32), a first oil hole (33) and a second oil hole (34); the oil outlet ends of the first oil passage (31) and the second oil passage (32) are respectively connected to the first oil hole (33) and the second oil hole (34); The rotor body (1) is provided with a fourth oil passage (11) and a fifth oil passage (12), the oil inlet end of the fourth oil passage (11) and the oil outlet end of the fifth oil passage (12) being located at one end of the rotor body (1) in the axial direction, and the oil outlet end of the fourth oil passage (11) and the oil inlet end of the fifth oil passage (12) being located at the other end of the rotor body (1) in the axial direction; The pressure plate (2) is provided with a third oil passage (21); the oil outlet and oil inlet ends of the third oil passage (21) on the pressure plate (2) at one end of the rotor body (1) are respectively connected to the oil inlet end of the fourth oil passage (11) and the first oil hole (33); the oil outlet and oil inlet ends of the third oil passage (21) on the pressure plate (2) at the other end of the rotor body (1) are respectively connected to the oil inlet end of the fifth oil passage (12) and the second oil hole (34).
2. The rotor assembly according to claim 1, characterized in that: The pressure plate (2) is also provided with a third oil hole (22), and the third oil hole (22) penetrates the pressure plate (2) in the axial direction, and the third oil hole (22) on the pressure plate (2) at one end of the rotor body (1) is connected to the oil outlet end of the fifth oil channel (12), and the third oil hole (22) on the pressure plate (2) at the other end of the rotor body (1) is connected to the oil outlet end of the fourth oil channel (11).
3. The rotor assembly according to claim 1, characterized in that: The inner wall of the rotor shaft (3) is provided with a first groove and a second groove extending in the axial direction, the first groove constituting the first oil passage (31), and the second groove constituting the second oil passage (32).
4. The rotor assembly according to claim 1, characterized in that: The oil inlet ends of the first oil passage (31) and the second oil passage (32) are both located on an end surface of one end of the rotor shaft (3).
5. The rotor assembly according to claim 1, characterized in that: The first oil passages (31) and the second oil passages (32) are alternately arranged along the circumferential direction of the rotor shaft (3).
6. The rotor assembly according to claim 1, characterized in that: The end surface of the pressure plate (2) facing the rotor body (1) is provided with a third groove, and the third groove is extended along the radial direction of the pressure plate (2) to form the third oil channel (21).
7. The rotor assembly according to claim 2, characterized in that: The third oil passages (21) and the third oil holes (22) are alternately arranged along the circumference of the pressure plate (2).
8. The rotor assembly according to claim 1, characterized in that: The third oil passage (21) comprises a first passage (211) and a second passage (212) which are connected to each other, the oil inlet end of the first passage (211) is connected to the first oil hole (33) or the second oil hole (34), the second passage (212) is arranged opposite to and connected to the oil inlet end of the fourth oil passage (11) or the fifth oil passage (12), and the size of the second passage (212) in a set direction is larger than the size of the first passage (211) in the set direction, wherein the set direction is parallel to the pressure plate (2) and perpendicular to the extension direction of the third oil passage (21).
9. A motor, characterized in that: Comprising a rotor assembly as described in any one of claims 1-8.
10. A vehicle, characterized in that: It comprises the rotor assembly as claimed in any one of claims 1 to 8, or it comprises the motor as claimed in claim 9.