Rotor, motor and vehicle

Abstract

The invention provides a rotor, a motor and a vehicle, and belongs to the technical field of vehicles. The rotor comprises a rotating shaft, an oil guide disc, a plurality of iron cores and a plurality of magnetic steels. The rotating shaft is sleeved with the oil guide disc, an oil way and a first oil guide hole are formed in the oil guide disc, cooling oil flows in the oil way, the oil way is communicated with the first oil guide hole, and the two ends of the first oil guide hole penetrate through the two end faces of the oil guide disc respectively. The multiple iron cores are arranged on the rotating shaft in a sleeving mode and abut against the two end faces of the oil guide disc in the axial direction of the rotating shaft respectively, the multiple iron cores are provided with oil guide channels for containing the magnetic steel, the oil guide channels of the multiple iron cores located on the same side of the oil guide disc are sequentially communicated, and the oil guide channels of the two closest iron cores on the two sides of the oil guide disc are communicated with the two ends of the first oil guide hole respectively. By adopting the rotor disclosed by the invention, cooling oil flows to the first oil guide hole from the oil path of the oil guide disc and then is divided into two parts, and the two parts of cooling oil respectively flow into the oil guide channels of the iron cores on the two sides of the oil guide disc through the two ends of the first oil guide hole, so that the respective flowing paths of the two parts of cooling oil are shortened.

Description

Technical Field

[0001] This disclosure pertains to the field of vehicle technology, and particularly relates to a rotor, an electric motor, and a vehicle. Background Technology

[0002] New energy vehicle drive motors are rapidly evolving around the core goals of increasing power, improving efficiency, optimizing structure, and achieving intelligent control, exhibiting significant trends such as high performance, integration, high efficiency, and high voltage.

[0003] The rotor of the motor includes a shaft, a balance disc, an iron core, and magnets. The balance disc and the iron core are both mounted on the shaft, and the iron core is connected to both ends. Multiple oil guide channels can be set inside the iron core, running through both ends of the iron core. Magnets are installed in each of the multiple oil guide channels. The balance discs located at both ends of the iron core have oil inlet and oil outlet channels, which are connected to the oil guide channels. Cooling oil can flow in from the oil inlet channel of the balance disc on one side of the iron core, cool the magnets after flowing through the oil guide channels, and then flow out from the oil outlet channel of the balance disc on the other side of the iron core.

[0004] However, the cooling oil has a long flow path, flowing in through the oil inlet channel of the balance disc on one side of the iron core and out through the oil outlet channel of the balance disc on the other side of the iron core. This results in the cooling oil absorbing more heat when it flows to the vicinity of the oil outlet channel, and the temperature difference between the cooling oil and the magnets near the oil outlet channel in the oil guide channel is small. Therefore, the cooling effect on the magnets near the oil outlet channel in the oil guide channel is poor, thereby reducing the overall cooling effect on the magnets. Summary of the Invention

[0005] This disclosure provides a rotor, a motor, and a vehicle, which can solve the technical problems existing in related technologies. The technical solution is as follows: In a first aspect, this disclosure provides a rotor, which includes a rotating shaft, an oil guide plate, multiple iron cores, and multiple magnets; The oil guide plate is sleeved on the rotating shaft. The oil guide plate has an oil passage and a first oil guide hole. The oil passage is for cooling oil to flow in and is connected to the first oil guide hole. The two ends of the first oil guide hole pass through the two end faces of the oil guide plate respectively. The plurality of iron cores are all sleeved on the rotating shaft and respectively abut against the two end faces of the oil guide plate in the axial direction of the rotating shaft. The plurality of iron cores are provided with oil guide channels to accommodate the magnets. The oil guide channels of the plurality of iron cores located on the same side of the oil guide plate are connected in sequence. The oil guide channels of the two iron cores closest to each other on both sides of the oil guide plate are respectively connected to the two ends of the first oil guide hole.

[0006] In some possible implementations, the shaft has an oil inlet and a second oil guide hole. The oil inlet passes through one end of the shaft to allow cooling oil to flow in. One end of the second oil guide hole is connected to the oil inlet, and the other end passes through the outer side of the shaft and is connected to the oil passage.

[0007] In some possible implementations, the central axis of the oil inlet coincides with the central axis of the rotating shaft.

[0008] In some possible implementations, the iron core has multiple non-interconnected oil guiding channels, each of which contains the magnet, and all of the multiple oil guiding channels are connected to the oil circuit.

[0009] In some possible implementations, the oil guide plate has a plurality of first oil guide holes and a plurality of oil passages, the plurality of first oil guide holes are connected to a plurality of oil guide channels in a one-to-one correspondence, and each first oil guide hole is connected to one of the oil passages. Multiple second oil guide holes are evenly distributed around the central axis of the rotating shaft, and each of the multiple second oil guide holes is connected to a corresponding oil passage.

[0010] In some possible implementations, the rotor further includes two balance discs; Both balance discs are sleeved on the rotating shaft and are arranged at intervals along the axial direction of the rotating shaft. The oil guide disc and the plurality of iron cores are arranged between the two balance discs. Both balance discs are provided with oil outlet holes. One end of the oil outlet hole penetrates the end face of the balance disc facing the nearest iron core and communicates with the oil guide channel of the nearest iron core. The other end of the oil outlet hole penetrates the other outer surface of the balance disc to allow the cooling oil to flow out.

[0011] In some possible implementations, the end of the oil outlet hole away from the oil guide channel extends through the outer surface of the balance disc.

[0012] In some possible implementations, one end of the shaft is provided with a step for one of the balance discs to abut against, and the other end is used to connect a fastener that abuts against the other balance disc.

[0013] Secondly, this disclosure provides an electric motor including the rotor described above.

[0014] Thirdly, this disclosure provides a vehicle including the aforementioned motor.

[0015] The technical solution provided in this disclosure includes at least the following beneficial effects: This disclosure provides a rotor in which cooling oil flows from the oil passage of the oil guide plate to the first oil guide hole and is divided into two parts. The two parts of cooling oil flow into the oil guide channels of the iron cores on both sides of the oil guide plate through the two ends of the first oil guide hole, respectively, and cool the magnets in the oil guide channels of the iron cores on both sides of the oil guide plate. The flow path of the two parts of cooling oil is shortened, reducing the number of magnets that need to be cooled by the two parts of cooling oil, and thus reducing the heat absorbed by the two parts of cooling oil when they flow to the end of their respective flow paths. Therefore, the temperature difference between the two parts of cooling oil and the magnets located at the end of their respective flow paths is still large, which can improve the cooling effect of the two parts of cooling oil on the magnets located at the end of their respective flow paths, thereby improving the overall cooling effect of the cooling oil on the magnets.

[0016] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0017] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure. In the drawings: Figure 1 This is a schematic diagram of the structure of a rotor provided in an embodiment of this disclosure; Figure 2 This is a cross-sectional view of a rotor provided in an embodiment of this disclosure; Figure 3 This is a schematic diagram of an oil guide plate provided in an embodiment of this disclosure; Figure 4 This is a schematic diagram of an iron core provided in an embodiment of this disclosure; Figure 5 This is a schematic diagram of a balance disc provided in an embodiment of this disclosure.

[0018] Legend 1. Rotor; 10. Shaft; 101. Oil inlet hole; 102. Second oil guide hole; 103. Step; 11. Oil guide plate; 111. Oil passage; 112. First oil guide hole; 12. Iron core; 121. Oil guide channel; 123. Installation channel; 124. First weight reduction hole; 125. Second weight reduction hole; 13. Magnets; 14. Balance disc; 141. Oil outlet hole; 15. Fasteners.

[0019] The accompanying drawings have illustrated specific embodiments of this disclosure, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concepts of this disclosure to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this disclosure clearer, the embodiments of this disclosure will be further described in detail below with reference to the accompanying drawings.

[0021] It should be noted that, unless otherwise specified, the embodiments and features described in this disclosure can be combined with each other. This disclosure will now be described in detail with reference to the accompanying drawings and embodiments.

[0022] The rotor of the motor includes a shaft, a balance disc, an iron core, and magnets. The balance disc and the iron core are both mounted on the shaft, and the iron core is connected to both ends. Multiple oil guide channels can be set inside the iron core, running through both ends of the iron core. Magnets are installed in each of the multiple oil guide channels. The balance discs located at both ends of the iron core have oil inlet and oil outlet channels, which are connected to the oil guide channels. Cooling oil can flow in from the oil inlet channel of the balance disc on one side of the iron core, cool the magnets after flowing through the oil guide channels, and then flow out from the oil outlet channel of the balance disc on the other side of the iron core. Typically, cooling oil flows in through the oil inlet channel of the balance disc on one side of the iron core, passes through all the iron cores, and then flows out through the oil outlet channel of the balance disc on the other side of the iron core. The flow path is relatively long, so the cooling oil can only flow to the magnets located at the end of the flow path after cooling a large number of magnets. At this point, the cooling oil carries a lot of heat, resulting in a small temperature difference between the cooling oil and the magnets located at the end of the flow path, thus weakening the cooling effect on the magnets located at the end of the flow path.

[0023] This disclosure provides a rotor 1, with reference to... Figure 1 and Figure 2 The rotor 1 includes a shaft 10, an oil guide plate 11, multiple iron cores 12, and multiple magnets 13. The oil guide plate 11 is sleeved on the shaft 10, as shown in the reference. Figure 3 The oil guide plate 11 has an oil passage 111 and a first oil guide hole 112. The oil passage 111 supplies cooling oil and communicates with the first oil guide hole 112. The two ends of the first oil guide hole 112 pass through the two end faces of the oil guide plate 11. (Reference) Figure 2 Multiple iron cores 12 are sleeved on the rotating shaft 10, and respectively abut against the two end faces of the oil guide plate 11 in the axial direction of the rotating shaft 10. (Refer to...) Figure 4Each of the multiple iron cores 12 has an oil guiding channel 121 for accommodating the magnet 13. The oil guiding channels 121 of the multiple iron cores 12 located on the same side of the oil guiding plate 11 are connected in sequence. The oil guiding channels 121 of the two closest iron cores 12 on both sides of the oil guiding plate 11 are respectively connected to the two ends of the first oil guiding hole 112.

[0024] The cooling oil flows from the oil passage 111 of the oil guide plate 11 to the first oil guide hole 112 and then splits into two parts. The first part of the cooling oil flows into the oil guide channel 121 of the iron core 12 on one side of the oil guide plate 11 through one end of the first oil guide hole 112. The second part of the cooling oil flows into the oil guide channel 121 of the iron core 12 on the other side of the oil guide plate 11 through the other end of the first oil guide hole 112. Compared with the flow path of cooling oil flowing into one end of multiple iron cores 12 and flowing out from the other end, the flow path of the first part of the cooling oil and the flow path of the second part of the cooling oil are shortened. Therefore, the amount of magnet 13 cooled by the first part of the cooling oil is reduced, resulting in a larger temperature difference between the first part of the cooling oil and the magnet 13 located at the end of the flow path when the first part of the cooling oil flows to the end of the flow path, thereby improving the cooling effect of the first part of the cooling oil on the magnet 13 located at the end of the flow path; similarly, the amount of magnet 13 cooled by the second part of the cooling oil is also reduced, resulting in a larger temperature difference between the second part of the cooling oil and the magnet 13 located at the end of the flow path when the second part of the cooling oil flows to the end of the flow path, thereby improving the cooling effect of the second part of the cooling oil on the magnet 13 located at the end of the flow path.

[0025] In some possible implementations, refer to Figure 2 The rotating shaft 10 has an oil inlet hole 101 and a second oil guide hole 102. The oil inlet hole 101 passes through one end of the rotating shaft 10 to allow cooling oil to flow in. One end of the second oil guide hole 102 is connected to the oil inlet hole 101, and the other end passes through the outer side of the rotating shaft 10 and is connected to the oil passage 111.

[0026] Cooling oil flows into the oil inlet 101 through one end of the rotating shaft 10, and then flows through the second oil guide hole 102 into the oil passage 111 of the oil guide plate 11. After flowing from the oil passage 111 to the first oil guide hole 112, it splits into two parts. The first part of the cooling oil flows through one end of the first oil guide hole 112 into the oil guide channel 121 of the iron core 12 on one side of the oil guide plate 11, cooling the magnet 13 in the oil guide channel 121. The second part of the cooling oil flows through the other end of the first oil guide hole 112 into the oil guide channel 121 of the iron core 12 on the other side of the oil guide plate 11, cooling the magnet 13 in the oil guide channel 121.

[0027] In some possible implementations, refer to Figure 2 The central axis of the oil inlet hole 101 coincides with the central axis of the rotating shaft 10.

[0028] The central axis of the oil inlet hole 101 coincides with the central axis of the rotating shaft 10, which can ensure the geometric symmetry of the cross section of the rotating shaft 10 as much as possible and prevent the rotating shaft 10 from having dynamic balance problems due to the opening of the oil inlet hole 101.

[0029] In some possible implementations, the central axis of the second oil guide hole 102 may intersect with and be perpendicular to the central axis of the rotating shaft 10.

[0030] The central axis of the second oil guide hole 102 intersects and is perpendicular to the central axis of the rotating shaft 10, which minimizes the length of the second oil guide hole 102, shortens the distance that the cooling oil needs to flow from the oil inlet hole 101 into the oil passage 111, and also ensures that there are no bends in the second oil guide hole 102, preventing uneven flow of the cooling oil in the second oil guide hole 102.

[0031] In some possible implementations, refer to Figure 4 The iron core 12 has multiple non-interconnected oil guiding channels 121, each of which contains a magnet 13, and all of the multiple oil guiding channels 121 are connected to the oil circuit 111.

[0032] Magnets 13 are installed in multiple non-interconnected oil guiding channels 121, which can divide the magnets 13 into multiple smaller magnets, increase the contact area between the magnets 13 and the cooling oil, thereby improving the cooling oil, and at the same time reduce the distance between the center and the outer surface of each magnet 13, so as to avoid the part of the magnet 13 near the center from having too large a distance from the outer surface, which would make it difficult for the heat to be carried away by the cooling oil, thus preventing the situation where too much heat accumulates in the part of the magnet 13 near the center but the heat dissipation is poor.

[0033] In some possible implementations, multiple oil channels 121 can extend along the axial direction of the iron core 12.

[0034] The oil guiding channel 121 extends along the axial direction of the iron core 12, which can ensure that the length of the oil guiding channel 121 is minimized, further shortening the distance that the first part of the cooling oil and the second part of the cooling oil flow in their respective corresponding oil guiding channels 121, and improving the efficiency of the cooling oil in carrying the heat of the magnet 13 out of the iron core 12.

[0035] In some possible implementations, refer to Figure 4 The iron core 12 can also have multiple unconnected placement channels 123. The placement channels 123 are used to accommodate the magnets 13. At least two oil guiding channels 121 can be arranged around each placement channel 123, and each placement channel 123 and oil guiding channel 121 are not connected to each other.

[0036] The magnet 13 within the mounting channel 123 is not cooled through direct contact with the cooling oil, but rather through cooling oil flowing within the oil guide channels 121 surrounding the mounting channel 123. Specifically, as the cooling oil flows within the oil guide channels 121, the heat dissipated by the magnet 13 within the mounting channel 123 is transferred to the cooling oil within the oil guide channels 121 via the iron core 12, thus achieving cooling through the cooling oil flowing within the oil guide channels 121 surrounding the mounting channel 123. It is understandable that since the heat dissipation efficiency of the magnet 13 within the mounting channel 123 being conducted to the cooling oil within the oil guide channels 121 via the iron core 12 is lower than the heat dissipation efficiency when the magnet 13 is in direct contact with the cooling oil, multiple oil guide channels 121 can be arranged around each mounting channel 123. The heat dissipated by the magnet 13 within the mounting channel 123 is then conducted through the iron core 12 to the cooling oil in the surrounding multiple oil guide channels 121, thereby improving the cooling effect on the magnet 13 within the mounting channel 123.

[0037] In some possible implementations, refer to Figure 3 The oil guide plate 11 has multiple first oil guide holes 112 and multiple oil passages 111. The multiple first oil guide holes 112 are connected to multiple oil guide channels 121 in a one-to-one correspondence, and each first oil guide hole 112 is connected to one of the oil passages 111. Multiple second oil guide holes 102 are evenly distributed around the central axis of the rotating shaft 10, and the multiple second oil guide holes 102 are connected to multiple oil passages 111 in a one-to-one correspondence.

[0038] It should be noted that "each first oil guide hole 112 is connected to one of the oil passages 111" means that each first oil guide hole 112 is connected to only one oil passage 111. In one example, the number of first oil guide holes 112 may be greater than the number of oil passages 111. In this case, one oil passage 111 may be connected to at least two first oil guide holes 112. In another example, the number of first oil guide holes 112 may be equal to the number of oil passages 111. In this case, one oil passage 111 may be connected to only one first oil guide hole 112, that is, multiple oil guide holes are connected to multiple oil passages 111 in a one-to-one correspondence.

[0039] In some possible implementations, refer to Figure 3 Multiple oil passages 111 can be opened on one end surface of the oil guide plate 11.

[0040] Multiple oil passages 111 are opened on one end surface of the oil guide plate 11, which can reduce the difficulty of opening the oil passages 111.

[0041] After the surface of one end of the oil guide plate 11 that opens the oil passage 111 is in contact with the end face of the iron core 12, the oil passage 111 is closed by the end face of the iron core 12 so that the cooling oil can flow along the oil passage 111.

[0042] In some possible implementations, refer to Figure 4 The iron core 12 can also have multiple first weight reduction holes 124. The multiple first weight reduction holes 124 all penetrate through both ends of the iron core 12. The multiple first weight reduction holes 124 are evenly distributed around the central axis of the iron core 12. The distribution area of ​​the multiple first weight reduction holes 124 is closer to the central axis of the iron core 12 than the distribution area of ​​the multiple oil guide channels 121. The gap formed between two adjacent weight reduction holes can allow the oil passage 111 to pass through.

[0043] The first weight-reducing hole 124 can reduce the weight of the iron core 12, thereby reducing the rotational inertia of the rotor 1, and can also optimize the magnetic circuit.

[0044] The oil passage 111 needs to be completely sealed by the end face of the iron core 12 so that the cooling oil can flow along the oil passage 111 to the second oil guide hole 102. If the first weight reduction hole 124 partially overlaps with the oil passage 111, then when the cooling oil flows in the oil passage 111 to the part where the first weight reduction hole 124 and the oil passage 111 partially overlap, at least some of the cooling oil will flow into the first weight reduction hole 124, reducing the flow rate of cooling oil to the second oil guide hole 102, which in turn reduces the flow rate of cooling oil to the oil guide channel 121, thereby reducing the cooling effect on the magnet 13 in the oil guide channel 121.

[0045] In some possible implementations, refer to Figure 4 The iron core 12 may also have multiple second weight-reducing holes 125, the number of which is less than the number of first weight-reducing holes 124. All the second weight-reducing holes 125 penetrate both ends of the iron core 12 and are evenly distributed around the central axis of the iron core 12. The distribution area of ​​the second weight-reducing holes 125 is located between the distribution area of ​​the first weight-reducing holes 124 and the distribution area of ​​the oil guide channels 121. In the radial direction of the iron core 12, the interval formed between each pair of adjacent first weight-reducing holes 124 is used for the oil passage 111 to pass through or be covered by the second weight-reducing holes 125.

[0046] Similarly, the second weight-reducing hole 125 can reduce the weight of the iron core 12, thereby reducing the rotational inertia of the rotor 1.

[0047] Similarly, the oil passage 111 needs to be completely sealed by the end face of the iron core 12 so that the cooling oil can flow along the oil passage 111 to the second oil guide hole 102. If the second weight reduction hole 125 partially overlaps with the oil passage 111, then when the cooling oil flows in the oil passage 111 to the part where the second weight reduction hole 125 partially overlaps with the oil passage 111, at least some of the cooling oil will flow into the second weight reduction hole 125, reducing the flow rate of cooling oil to the second oil guide hole 102, which in turn reduces the flow rate of cooling oil to the oil guide channel 121, thereby reducing the cooling effect on the magnet 13 in the oil guide channel 121.

[0048] In some possible implementations, refer to Figure 3 The oil passage 111 has at least one bend, and the included angle of the bend is between 90° and 180°.

[0049] It is understandable that multiple oil guide channels 121 can surround the central axis of the iron core 12. The second oil guide holes 102, which correspond one-to-one with the multiple oil guide channels 121, are also distributed around the central axis of the oil guide plate 11. In order to realize that one oil passage 111 connects several second oil guide holes 102, the oil passage 111 can be bent after passing through the interval formed between two adjacent first weight reduction holes 124, so as to connect multiple second oil guide holes 102 in sequence.

[0050] The included angle of the bending position is in the range of 90°~180°, which can reduce the flow resistance of the cooling oil when it flows in the oil passage 111.

[0051] In some possible implementations, refer to Figure 2 The rotor 1 also includes two balance discs 14. Both balance discs 14 are sleeved on the rotating shaft 10 and are arranged at intervals along the axial direction of the rotating shaft 10. An oil guide disc 11 and multiple iron cores 12 are arranged between the two balance discs 14. (Reference) Figure 5 Both balance discs 14 are provided with oil outlet holes 141. One end of the oil outlet hole 141 passes through the end face of the balance disc 14 facing the nearest iron core 12 and is connected to the oil guide channel 121 of the nearest iron core 12. The other end of the oil outlet hole 141 passes through the other outer surface of the balance disc 14 to allow cooling oil to flow out.

[0052] In other words, the balance disc 14, iron core 12, oil guide disc 11, iron core 12 and balance disc 14 are arranged in sequence along the axial direction of the rotating shaft 10.

[0053] Cooling oil flows into the oil inlet 101 through one end of the rotating shaft 10, and then flows through the second oil guide hole 102 into the oil passage 111 of the oil guide plate 11. From there, it flows through the oil passage 111 to the first oil guide hole 112 and splits into two parts. The first part of the cooling oil flows through one end of the first oil guide hole 112 into the oil guide channel 121 of the iron core 12 on one side of the oil guide plate 11, cooling the magnet 13 within the oil guide channel 121, and then flows out of the oil guide channel 121 through the oil outlet 141 of the balance plate 14 on the same side. Similarly, the second part of the cooling oil flows through the other end of the first oil guide hole 112 into the oil guide channel 121 of the iron core 12 on the other side of the oil guide plate 11, cooling the magnet 13 within the oil guide channel 121, and then also flows out of the oil guide channel 121 through the oil outlet 141 of the balance plate 14 on the same side.

[0054] In some possible implementations, refer to Figure 5The end of the oil outlet 141 that is away from the oil guide channel 121 passes through the outer side of the balance disc 14.

[0055] By passing the end of the oil outlet 141 away from the oil guide channel 121 through the outer side of the balance disc 14, the cooling oil can be thrown out by the centrifugal force generated by the rotor 1 during rotation, thereby improving the efficiency of the cooling oil flowing out of the iron core 12.

[0056] In some possible implementations, refer to Figure 5 The oil outlet 141 is located on the end face of the balance disc 14 facing the iron core 12.

[0057] After the end face of the balance disc 14 facing the iron core 12 is in contact with the end face of the iron core 12, the side of the oil outlet 141 is closed by the end faces of the balance disc 14 and the iron core 12. The cooling oil in the oil guide channel 121 flows in through one end of the oil outlet 141 and flows out through one end of the oil outlet 141 through the outer side of the balance disc 14.

[0058] In some possible implementations, refer to Figure 1 One end of the rotating shaft 10 is provided with a step 103, which is provided for one of the balance discs 14 to abut against, and the other end is used to connect a fastener 15, which abuts against another balance disc 14.

[0059] Step 103 provides a positioning reference for one of the balance discs 14. After the balance disc 14, iron core 12, oil guide plate 11, iron core 12 and balance disc 14 are installed in sequence, fasteners 15 are installed, thereby clamping the balance disc 14, iron core 12, oil guide plate 11, iron core 12 and balance disc 14 with step 103.

[0060] The fastener 15 can be a nut, and the nut is connected to the shaft 10 by a thread.

[0061] The technical solutions provided in this disclosure have at least the following beneficial effects: This disclosure provides a rotor 1 in which cooling oil flows from the oil passage 111 of the oil guide plate 11 to the first oil guide hole 112 and is divided into two parts. The two parts of cooling oil flow through the two ends of the first oil guide hole 112 into the oil guide channels 121 of the iron cores 12 on both sides of the oil guide plate 11, respectively, and cool the magnets 13 in the oil guide channels 121 of the iron cores 12 on both sides of the oil guide plate 11. The flow paths of the two parts of cooling oil are shortened, and the number of magnets 13 that need to be cooled by the two parts of cooling oil is reduced. Therefore, when the two parts of cooling oil flow to the end of their respective flow paths, the temperature difference between them and the magnets 13 located at the end of their respective flow paths is large, thereby improving the cooling effect of the two parts of cooling oil on the magnets 13 located at the end of their respective flow paths.

[0062] This disclosure also provides an electric motor, which includes the rotor 1 described above.

[0063] This disclosure also provides a vehicle that includes the motor described above.

[0064] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this disclosure. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms “comprising” and / or “including” are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0065] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of this disclosure. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0066] In the description of this disclosure, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings and is only for the convenience of describing this disclosure and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this disclosure; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0067] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0068] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this disclosure.

[0069] The above description is merely a preferred embodiment of this disclosure and is not intended to limit this disclosure. Various modifications and variations can be made to this disclosure by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the scope of protection of this disclosure.

Claims

1. A rotor (1), characterized in that The rotor (1) comprises a rotating shaft (10), an oil guide disc (11), a plurality of iron cores (12) and a plurality of magnetic steels (13); The oil guide disc (11) is sleeved on the rotating shaft (10), and the oil guide disc (11) is provided with an oil channel (111) and a first oil guide hole (112); the oil channel (111) is used for flowing in cooling oil and is communicated with the first oil guide hole (112); and the two ends of the first oil guide hole (112) respectively penetrate the two end faces of the oil guide disc (11); The plurality of iron cores (12) are all sleeved on the rotating shaft (10) and abut against the two end faces of the oil guide disc (11) in the axial direction of the rotating shaft (10); the plurality of iron cores (12) are all provided with an oil guide channel (121) for accommodating the magnetic steel (13); the oil guide channels (121) of the plurality of iron cores (12) on the same side of the oil guide disc (11) are sequentially communicated; and the oil guide channels (121) of the two iron cores (12) on the two sides of the oil guide disc (11) are respectively communicated with the two ends of the first oil guide hole (112).

2. The rotor (1) according to claim 1, characterized in that The rotating shaft (10) is provided with an oil inlet hole (101) and a second oil guide hole (102); the oil inlet hole (101) penetrates one end of the rotating shaft (10) to flow in cooling oil; and one end of the second oil guide hole (102) is communicated with the oil inlet hole (101), and the other end penetrates the outer side face of the rotating shaft (10) and is communicated with the oil channel (111).

3. The rotor (1) according to claim 2, characterized in that The central axis of the oil inlet hole (101) coincides with the central axis of the rotating shaft (10).

4. The rotor (1) according to claim 2, characterized in that The iron core (12) is provided with a plurality of oil guide channels (121) which are not communicated with each other; each oil guide channel (121) accommodates the magnetic steel (13); and the plurality of oil guide channels (121) are communicated with the oil channel (111).

5. The rotor (1) according to claim 4, characterized in that The oil guide disc (11) is provided with a plurality of first oil guide holes (112) and a plurality of oil channels (111); the plurality of first oil guide holes (112) are one-to-one correspondingly communicated with the plurality of oil guide channels (121); and each first oil guide hole (112) is communicated with one oil channel (111); A plurality of second oil guide holes (102) are uniformly distributed around the central axis of the rotating shaft (10); and the plurality of second oil guide holes (102) are one-to-one correspondingly communicated with the plurality of oil channels (111).

6. The rotor (1) according to claim 1, characterized in that The rotor further comprises two balance discs (14); The two balance discs (14) are both sleeved on the rotating shaft (10) and are arranged in the axial direction of the rotating shaft (10) at intervals; the oil guide disc (11) and the plurality of iron cores (12) are arranged between the two balance discs (14); Each balance disc (14) is provided with an oil outlet hole (141); one end of the oil outlet hole (141) penetrates the balance disc (14) and faces the end face of the nearest iron core (12), and is communicated with the oil guide channel (121) of the nearest iron core (12); and the other end of the oil outlet hole (141) penetrates the other outer surface of the balance disc (14) to flow out the cooling oil.

7. The rotor (1) according to claim 6, characterized in that The oil outlet hole (141) penetrates the outer side of the balance disc (14) away from one end of the oil guide channel (121).

8. The rotor (1) according to claim 6, characterized in that One end of the rotating shaft (10) is provided with a step (103) for abutting one of the balance discs (14), and the other end is used for connecting a fastener (15) for abutting the other balance disc (14).

9. An electric machine characterized by A rotor (1) as claimed in any of claims 1 to 8.

10. A vehicle characterized by comprising: An electric machine as claimed in claim 9. An electric machine as claimed in claim 9.

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