Rotor, electric machine and vehicle
By setting a bent lamination to close the gap on the iron core on one side of the oil guide plate, the problem of oil leakage between the oil guide plate and the iron core is solved, ensuring that the cooling oil flows effectively into the oil guide channel and improving the cooling effect of the magnet.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- CHERY AUTOMOBILE CO LTD
- Filing Date
- 2025-12-17
- Publication Date
- 2026-08-04
AI Technical Summary
Oil leakage between the oil guide plate and the iron core reduces the amount of cooling oil, thus decreasing the cooling effect on the magnets.
Multiple overlapping laminations are set on the iron core closest to the oil guide plate on one side. The edges of the laminations protrude and bend to abut against the outer side of the oil guide plate, sealing the gap between the iron core and the oil guide plate to prevent cooling oil from overflowing.
This effectively prevents cooling oil from overflowing from the gap between the iron core and the oil guide plate, ensuring that more cooling oil flows into the oil guide channel of the iron core, thus improving the cooling effect on the magnets.
Smart Images
Figure CN121618760B_ABST
Abstract
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 motor includes a shaft, a balance disc, an oil guide disc, an iron core, and magnets. The balance disc, oil guide disc, and iron core are all mounted on the shaft, with two balance discs spaced apart. The oil guide disc and iron core are positioned between the two balance discs. Both ends of the oil guide disc are connected to the iron core. Multiple oil guide channels running through both ends of the iron core can be configured inside the iron core, and magnets are installed within each of these channels. The oil guide disc guides cooling oil to the oil guide channels on both sides of the iron core to cool the magnets within these channels.
[0004] However, oil leakage between the oil guide plate and the iron core will reduce the amount of cooling oil flowing into the oil guide channel of the iron core, thus reducing the cooling effect on the magnet. 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:
[0006] In a first aspect, this disclosure provides a rotor, which includes a rotating shaft, an oil guide plate, multiple iron cores, and multiple magnets;
[0007] 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.
[0008] 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.
[0009] The iron core closest to at least one side of the oil guide plate includes a plurality of overlapping laminations, the edge of the lamination closest to the oil guide plate protruding from the edge of the oil guide plate to form a protrusion, the protrusion bending toward the oil guide plate and abutting against the outer surface of the oil guide plate.
[0010] In some possible implementations, the iron core closest to one side of the oil guide plate includes a plurality of overlapping laminations, the edge of the lamination closest to the oil guide plate protruding from the edge of the oil guide plate to form a protrusion, the protrusion bending toward the oil guide plate and abutting against the outer surface of the oil guide plate.
[0011] In some possible implementations, the iron cores closest to both sides of the oil guide plate include a plurality of overlapping laminations, the edge of the lamination closest to the oil guide plate protruding from the edge of the oil guide plate to form a protrusion, both of the protrusions being bent toward the oil guide plate, one of the protrusions being sandwiched between the outer side of the oil guide plate and the other protrusion.
[0012] 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.
[0013] 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.
[0014] 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.
[0015] 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.
[0016] In some possible implementations, the rotor further includes two balance discs;
[0017] 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.
[0018] 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.
[0019] 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.
[0020] Secondly, this disclosure also provides an electric motor, including the rotor as described above.
[0021] Thirdly, this disclosure also provides a vehicle including the motor described above.
[0022] The technical solution provided in this disclosure includes at least the following beneficial effects:
[0023] The rotor provided in this disclosure has at least one outer edge of the lamination closest to the oil guide plate bent toward the oil guide plate to form a flange and abut against the outer surface of the oil guide plate, sealing the gap between the iron core and the oil guide plate. This prevents the cooling oil from the first oil guide hole from overflowing from the gap between the iron core and the oil guide plate during the flow of cooling oil from the first oil guide hole into the oil guide channel of the iron core, ensuring that more cooling oil flows into the oil guide channel of the iron core from the first oil guide hole, thereby ensuring the cooling effect on the magnet.
[0024] 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
[0025] 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:
[0026] Figure 1 This is a schematic diagram of the structure of a rotor provided in an embodiment of this disclosure;
[0027] Figure 2 This is a cross-sectional view of a rotor provided in an embodiment of this disclosure;
[0028] Figure 3 This is a schematic diagram of an oil guide plate provided in an embodiment of this disclosure;
[0029] Figure 4 This is a schematic diagram of an iron core provided in an embodiment of this disclosure;
[0030] Figure 5 yes Figure 2 An enlarged view of point A in the middle;
[0031] Figure 6 yes Figure 2 Another magnified view of point A in the middle;
[0032] Figure 7 This is a schematic diagram of a balance disc provided in an embodiment of this disclosure.
[0033] Legend
[0034] 1. Rotor;
[0035] 10. Rotating shaft; 101. Oil inlet hole; 102. Second oil guide hole; 103. Step;
[0036] 11. Oil guide plate; 111. Oil passage; 112. First oil guide hole;
[0037] 12. Iron core; 121. Oil guide channel; 122. Lamination; 1221. Protrusion; 123. Mounting channel; 124. First weight reduction hole; 125. Second weight reduction hole;
[0038] 13. Magnets;
[0039] 14. Balance disc; 141. Oil outlet;
[0040] 15. Fasteners.
[0041] 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
[0042] 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.
[0043] The terminology used in the embodiments of this disclosure is for illustrative purposes only and is not intended to limit the disclosure. Unless otherwise defined, the technical or scientific terms used herein should be understood in their ordinary sense by one of ordinary skill in the art to which this disclosure pertains. The terms “first,” “second,” “third,” and similar terms used in this patent application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms “a” or “one,” and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms “comprising,” “including,” and similar terms mean that the elements or objects preceding “comprising” or “including” encompass the elements or objects listed following “comprising” or “including” and their equivalents, and do not exclude other elements or objects. The terms “connected,” “linked,” and similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The terms “upper,” “lower,” “left,” “right,” etc., are used only to indicate relative positional relationships, and these relative positional relationships may change accordingly when the absolute position of the described object changes.
[0044] The motor includes a shaft, a balance disc, an oil guide disc, an iron core, and magnets. The balance disc, oil guide disc, and iron core are all mounted on the shaft, with two balance discs spaced apart. The oil guide disc and iron core are positioned between the two balance discs. Both ends of the oil guide disc are connected to the iron core. Multiple oil channels running through both ends of the iron core can be formed inside the iron core, and magnets are installed in each of these channels. The oil guide disc guides cooling oil to the oil channels in the iron core on both sides to cool the magnets within the channels. Oil leakage between the oil guide disc and the iron core will reduce the amount of cooling oil flowing into the oil channels, thus decreasing the cooling effect on the magnets.
[0045] In a first aspect, 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 4 Multiple iron cores 12 are provided with oil guiding channels 121 to accommodate magnets 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. (Reference) Figure 5 and Figure 6 At least the iron core 12 closest to the oil guide plate 11 includes a plurality of overlapping laminations 122. The edge of the lamination 122 closest to the oil guide plate 11 protrudes from the edge of the oil guide plate 11 to form a protrusion 1221. The protrusion 1221 bends toward the oil guide plate 11 and abuts against the outer side of the oil guide plate 11.
[0046] It should be noted that the thickness of the stamp 122 is relatively thin, and a single stamp 122 can deform under certain conditions.
[0047] At least on one side of the oil guide plate 11, the iron core 12 closest to it is formed by stacking multiple laminations 122. The diameter of the lamination 122 closest to the oil guide plate 11 is larger than that of the other laminations 122 and also larger than the diameter of the oil guide plate 11. The diameters of the other laminations 122 are equal. The edge of the lamination 122 closest to the oil guide plate 11 forms a protrusion 1221. The protrusion 1221 can bend toward the oil guide plate 11 to form a flange. After abutting against the outer surface of the oil guide plate 11, it seals the gap between the iron core 12 and the oil guide plate 11, preventing the cooling oil from overflowing from the gap between the iron core 12 and the oil guide plate 11, and ensuring the cooling effect on the magnet 13.
[0048] In some possible implementations, refer to Figure 4 The iron core 12 closest to one side of the oil guide plate 11 includes multiple overlapping laminations 122. The edge of the lamination 122 closest to the oil guide plate 11 protrudes from the edge of the oil guide plate 11 to form a protrusion 1221. The protrusion 1221 bends toward the oil guide plate 11 and abuts against the outer side of the oil guide plate 11.
[0049] The iron core 12 closest to one side of the oil guide plate 11 is formed by stacking multiple laminations 122. The diameter of the lamination 122 closest to the oil guide plate 11 is larger than that of the other laminations 122 and also larger than the diameter of the oil guide plate 11. The diameters of the other laminations 122 are equal. The edge of the lamination 122 closest to the oil guide plate 11 forms a protrusion 1221. The protrusion 1221 can bend towards the oil guide plate 11 to form a flange. After abutting against the outer surface of the oil guide plate 11, it seals the gap between the iron core 12 on the corresponding side and the oil guide plate 11, which can prevent the cooling oil from overflowing from the gap between the iron core 12 on the corresponding side and the oil guide plate 11, thus ensuring the cooling effect on the magnet 13.
[0050] It is understandable that the gap between the iron core 12 closest to the oil guide plate 11 on the other side and the oil guide plate 11 can be sealed in the same way, as described in the following embodiments, and will not be repeated here. Of course, the gap between the iron core 12 closest to the oil guide plate 11 on the other side can also be sealed by means of glue or other methods, and is not limited here.
[0051] In some possible implementations, refer to Figure 5 The iron cores 12 closest to both sides of the oil guide plate 11 include multiple overlapping laminations 122. The edge of the lamination 122 closest to the oil guide plate 11 protrudes from the edge of the oil guide plate 11 to form a protrusion 1221. Both protrusions 1221 are bent toward the oil guide plate 11, and one of the protrusions 1221 is sandwiched between the outer side of the oil guide plate 11 and the other protrusion 1221.
[0052] The iron cores 12 closest to each other on both sides of the oil guide plate 11 are formed by stacking multiple laminations 122. The diameter of the laminations 122 closest to each other on both sides of the oil guide plate 11 is larger than that of the other laminations 122 and also larger than the diameter of the oil guide plate 11. The diameters of the other laminations 122 are equal. The edges of the laminations 122 closest to the oil guide plate 11 on both sides of the oil guide plate 11 form protrusions 1221. The protrusions 1221 of the two laminations 122 are bent towards the oil guide plate 11 to form flanges. The flanges formed by the protrusions 1221 of the two laminations overlap and abut against each other. The flange formed by one of the protrusions 1221 abuts against the outer surface of the oil guide plate 11, thereby sealing the gap between the iron cores 12 on both sides of the oil guide plate 11 and the oil guide plate 11. This prevents the cooling oil from overflowing from the gap between the iron cores 12 on both sides of the oil guide plate 11 and the oil guide plate 11, ensuring the cooling effect on the magnet 13.
[0053] In some possible implementations, the iron cores 12 closest to both sides of the oil guide plate 11 include a plurality of overlapping laminations 122. The edge of the lamination 122 closest to the oil guide plate 11 protrudes from the edge of the oil guide plate 11 to form a protrusion 1221. Both protrusions 1221 are bent toward the oil guide plate 11. Both protrusions 1221 abut against the outer side of the oil guide plate 11, and the outer sides of the two protrusions 1221 are opposite to each other.
[0054] The iron cores 12 closest to each other on both sides of the oil guide plate 11 are formed by stacking multiple laminations 122. The diameter of the laminations 122 closest to each other on both sides of the oil guide plate 11 is larger than that of the other laminations 122 and also larger than the diameter of the oil guide plate 11. The diameters of the other laminations 122 are equal. The edges of the laminations 122 closest to the oil guide plate 11 on both sides form protrusions 1221. The protrusions 1221 of the two laminations 122 are bent towards the oil guide plate 11 to form flanges. The flanges formed by the protrusions 1221 of the two laminations abut against the outer surface of the oil guide plate 11, thereby sealing the gap between the iron cores 12 and the oil guide plate 11 on both sides of the oil guide plate 11. This prevents the cooling oil from overflowing from the gap between the iron cores 12 and the oil guide plate 11 on both sides of the oil guide plate 11, ensuring the cooling effect on the magnet 13.
[0055] 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.
[0056] Cooling oil flows into the oil inlet 101 through one end of the rotating shaft 10, and then flows from 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 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, cooling the magnet 13 in the oil guide channel 121. 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, cooling the magnet 13 in the oil guide channel 121.
[0057] In some possible implementations, the central axis of the oil inlet 101 coincides with the central axis of the rotating shaft 10.
[0058] 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.
[0059] 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.
[0060] The central axis of the second oil guide hole 102 intersects and is perpendicular to the central axis of the rotating shaft 10, which ensures that the length of the second oil guide hole 102 is minimized, shortening the distance that the cooling oil needs to flow from the oil inlet hole 101 into the oil passage 111. At the same time, it also ensures that the second oil guide hole 102 has no bends, preventing uneven flow of the cooling oil in the second oil guide hole 102.
[0061] 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.
[0062] 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.
[0063] In some possible implementations, multiple oil channels 121 can extend along the axial direction of the iron core 12.
[0064] 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.
[0065] 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.
[0066] 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.
[0067] 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.
[0068] 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.
[0069] 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.
[0070] 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.
[0071] 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.
[0072] 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.
[0073] 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.
[0074] 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.
[0075] In some possible implementations, refer to Figure 4The 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.
[0076] 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.
[0077] 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.
[0078] 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°.
[0079] 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.
[0080] 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.
[0081] 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 7Both 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.
[0082] 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.
[0083] 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.
[0084] In some possible implementations, refer to Figure 7 The 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.
[0085] 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.
[0086] In some possible implementations, refer to Figure 7 The oil outlet 141 is located on the end face of the balance disc 14 facing the iron core 12.
[0087] 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.
[0088] In some possible implementations, refer to Figure 2 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.
[0089] 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.
[0090] The fastener 15 can be a nut, and the nut is connected to the shaft 10 by a thread.
[0091] The technical solutions provided in this disclosure have at least the following beneficial effects:
[0092] The rotor 1 provided in this disclosure has at least one lamination 122 closest to the oil guide plate 11 bent toward the oil guide plate 11 and abutting against the outer side of the oil guide plate 11, sealing the gap between the iron core 12 and the oil guide plate 11, which can prevent cooling oil from overflowing from the gap between the iron core 12 and the oil guide plate 11, so as to ensure the cooling effect on the magnet 13.
[0093] Secondly, this disclosure also provides an electric motor, including the rotor 1 as described above.
[0094] Thirdly, this disclosure also provides a vehicle including the motor described above.
[0095] The above are merely optional embodiments of this disclosure and are not intended to limit this disclosure. Any modifications, equivalent substitutions, improvements, etc., made within the principles of this disclosure should be included within the protection scope of this disclosure.
Claims
1. A rotor, characterized in that, The rotor (1) includes a rotating shaft (10), an oil guide plate (11), multiple iron cores (12) and multiple magnets (13). The oil guide plate (11) is sleeved on the rotating shaft (10). The oil guide plate (11) has an oil passage (111) and a first oil guide hole (112). The oil passage (111) is connected to 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). The iron cores (12) are all 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). Each iron core (12) is provided with an oil guide channel (121) to accommodate the magnet (13). The oil guide channels (121) of the iron cores (12) located on the same side of the oil guide plate (11) are connected in sequence. The oil guide channels (121) of the two closest iron cores (12) on both sides of the oil guide plate (11) are respectively connected to the two ends of the first oil guide hole (112). The iron core (12) closest to at least one side of the oil guide plate (11) includes a plurality of laminations (122), the lamination (122) closest to the oil guide plate (11) protruding from the edge of the oil guide plate (11) to form a protrusion (1221), the protrusion (1221) bending toward the oil guide plate (11) and abutting against the outer side of the oil guide plate (11).
2. The rotor according to claim 1, characterized in that, The iron core (12) closest to one side of the oil guide plate (11) includes a plurality of the laminations (122). The lamination (122) closest to the oil guide plate (11) protrudes from the edge of the oil guide plate (11) to form a protrusion (1221). The protrusion (1221) bends toward the oil guide plate (11) and abuts against the outer side of the oil guide plate (11).
3. The rotor according to claim 1, characterized in that, The iron cores (12) closest to both sides of the oil guide plate (11) include a plurality of laminations (122). The lamination (122) closest to the oil guide plate (11) protrudes from the edge of the oil guide plate (11) to form a protrusion (1221). Both protrusions (1221) are bent toward the oil guide plate (11). One of the protrusions (1221) is sandwiched between the outer side of the oil guide plate (11) and the other protrusion (1221).
4. The rotor 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) 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).
5. The rotor according to claim 4, characterized in that, The iron core (12) has multiple non-interconnected oil guiding channels (121), each of which contains the magnet (13), and all of the multiple oil guiding channels (121) are connected to the oil circuit (111).
6. The rotor according to claim 5, characterized in that, The oil guide plate (11) is provided with a plurality of first oil guide holes (112) and a plurality of oil passages (111). The plurality of first oil guide holes (112) are connected to the plurality of oil guide channels (121) one by one, and each first oil guide hole (112) is connected to one of the oil passages (111). A plurality of second oil guide holes (102) are evenly distributed around the central axis of the rotating shaft (10), and the plurality of second oil guide holes (102) are connected to the plurality of oil passages (111) one by one.
7. The rotor according to claim 1, characterized in that, The rotor also includes two balance discs (14). The two balance discs (14) are both sleeved on the rotating shaft (10) and are arranged at intervals along the axial direction of the rotating shaft (10). The oil guide disc (11) and the iron core (12) are arranged between the two balance discs (14). Both balance discs (14) are provided with oil outlet holes (141). One end of the oil outlet hole (141) penetrates 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) penetrates the other outer surface of the balance disc (14) to allow cooling oil to flow out.
8. The rotor according to claim 7, characterized in that, The end of the oil outlet (141) away from the oil guide channel (121) passes through the outer side of the balance disc (14).
9. An electric motor, characterized in that, Includes the rotor (1) as described in any one of claims 1-8.
10. A vehicle, characterized in that, Includes the motor as described in claim 9.