Rotor support structure, electric machine and vehicle

Abstract

The utility model relates to a kind of rotor support structure, motor and vehicle, comprising: outer journal, inner journal and intermediate connecting part, the outer surface of the outer journal is equipped with cooling groove, the cooling groove is around the axis of the outer journal setting, the outer journal is equipped with through-hole and liquid outlet hole, one end of the liquid outlet hole is communicated with the cooling groove;The inner journal is worn in the through-hole, the inner journal is spaced apart from the outer journal, liquid inlet hole is equipped in the inner journal;The intermediate connecting part is connected between the outer journal and the inner journal, the intermediate connecting part is equipped with bridging hole, the bridging hole is communicated between the liquid outlet hole and the liquid inlet hole.This scheme's rotor support structure, motor and vehicle, not only can improve the cooling efficiency of rotor support structure, can also ensure that cooling liquid is in cooling rotor support structure, almost without damaging the dynamic balance of rotor support structure.

Description

Technical Field

[0001] This application belongs to the field of vehicle component technology, specifically relating to a rotor support structure, a motor, and a vehicle. Background Technology

[0002] As a major component of a power system, an electric motor typically includes a rotor, stator, and magnet assembly. During operation, the temperature of both the rotor and magnet assembly rises, requiring cooling oil to lower their temperature. However, current oil passages for cooling oil struggle to effectively cool the rotor and magnet assembly while minimizing disruption to the rotor's dynamic balance. Utility Model Content

[0003] The purpose of this invention is to provide a rotor support structure, a motor, and a vehicle that can not only improve the cooling efficiency of the rotor support structure, but also ensure that the coolant can cool the rotor support structure without disrupting its dynamic balance.

[0004] The first aspect of this utility model discloses a rotor support structure, including: an outer journal, an inner journal, and an intermediate connecting portion. The outer surface of the outer journal is provided with a cooling groove, which is arranged around the axis of the outer journal. The outer journal is provided with a through hole and a liquid outlet hole, one end of which is connected to the cooling groove. The inner journal passes through the through hole and is spaced apart from the outer journal. The inner journal is provided with a liquid inlet hole. The intermediate connecting portion connects the outer journal and the inner journal and is provided with a bridging hole, which is connected between the liquid outlet hole and the liquid inlet hole.

[0005] In one exemplary embodiment, the liquid outlet includes a first liquid outlet and a second liquid outlet, both of which are connected to the bridging hole and the cooling tank. The first liquid outlet and the second liquid outlet are located at opposite ends of the diameter segment of the outer journal.

[0006] In one exemplary embodiment, the cooling tank includes a first cooling tank and a second cooling tank, both of which are arranged around the axis of the outer journal and are spaced apart from each other along the axial direction of the outer journal; the first liquid outlet is connected to the first cooling tank; and the second liquid outlet is connected to the second cooling tank.

[0007] In one exemplary embodiment, the first liquid outlet and the second liquid outlet are coaxially arranged; the outlet of the first liquid outlet and the outlet of the second liquid outlet are both spaced apart from the first cooling tank and also spaced apart from the second cooling tank; the first cooling tank and the second cooling tank are symmetrically arranged about the axis of the first liquid outlet along the axial direction of the outer journal.

[0008] In one exemplary embodiment, the bridging hole includes a first bridging hole and a second bridging hole. The first bridging hole connects the inlet hole and the first outlet hole, and the second bridging hole connects the inlet hole and the second outlet hole. The first bridging hole, the second bridging hole, the first outlet hole, and the second outlet hole are coaxially arranged. The axis of the first bridging hole and the axis of the second bridging hole pass through the axis of the outer journal. The axis of the inner journal, the axis of the inlet hole, and the axis of the outer journal coincide.

[0009] In one exemplary embodiment, the intermediate connecting portion is further provided with a bypass hole, which is arranged at intervals from the liquid inlet hole along the radial direction of the outer journal. One end of the bypass hole communicates with the first bridging hole or the second bridging hole, and the other end of the bypass hole passes through the surface of the intermediate connecting portion along the axial direction of the outer journal.

[0010] In one exemplary embodiment, the intermediate connection portion includes a plurality of bridging portions, which are connected between the outer journal and the inner journal, and the bridging portions are spaced apart; one of the bridging portions is provided with a first bridging hole, and another bridging portion is provided with a second bridging hole.

[0011] In an exemplary embodiment, the inner journal includes a flange section and a journal section, the flange and the journal section being located on two opposite sides of the intermediate connecting portion along the axial direction of the outer journal; the flange section is provided with a pin hole, a plurality of weight-reducing holes and a center hole, the pin hole, the plurality of weight-reducing holes and the center hole being spaced apart from each other, and each of the plurality of weight-reducing holes surrounding the center hole; the journal section includes a bearing mounting section, a resolver rotor mounting section and an oil pump interface section arranged sequentially, the diameter of the bearing mounting section being larger than the diameter of the resolver rotor mounting section, and the oil pump interface section including a first flat surface arranged radially, the first flat surface being used to connect with the inner rotor of the oil pump.

[0012] The second aspect of this utility model discloses an electric motor, including a magnet assembly and the aforementioned rotor support structure, wherein the magnet assembly is sleeved on the outer surface of the outer shaft journal.

[0013] The third aspect of this utility model discloses a vehicle, including an inner rotor of an oil pump and the aforementioned motor, wherein the inner rotor of the oil pump is connected to the inner journal.

[0014] The present invention has the following beneficial effects:

[0015] In this invention, firstly, when the rotor support structure requires cooling, coolant enters the inner journal through the inlet hole, then enters the intermediate connecting part through the bridging hole, and then enters the outer journal through the outlet hole, thereby achieving cooling of the rotor support structure from its internal space. Next, it flows into the cooling tank through the outlet hole to cool the rotor support structure from the outer surface of the outer journal. Ultimately, the coolant can cool the rotor support structure from both its internal space and external surface, significantly improving the cooling efficiency of the rotor support structure.

[0016] Since the cooling tank is arranged around the axis of the outer journal, the coolant flowing into the cooling tank can flow synchronously around the axis of the outer journal under the action of centripetal force when the rotor support structure rotates, so as to ensure that the coolant cools the rotor support structure without disrupting the dynamic balance of the rotor support structure.

[0017] It should be understood that the above general description and the following detailed description are merely exemplary and illustrative, and do not limit the application. Attached Figure Description

[0018] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort. The drawings herein are for illustrating the inventive concept of this application and are not entirely equivalent to the structure of the actual product protected by this application.

[0019] Figure 1 A three-dimensional structural diagram of the rotor support structure in an embodiment of this utility model is shown.

[0020] Figure 2 An embodiment of the present invention is shown. Figure 1 A partially enlarged structural diagram of the rotor support structure.

[0021] Figure 3 A bottom view of the rotor support structure in an embodiment of this utility model is shown.

[0022] Figure 4A top view of the rotor support structure in an embodiment of this utility model is shown.

[0023] Figure 5 A left-side view of the rotor support structure in an embodiment of this utility model is shown.

[0024] Figure 6 The diagram shows a right-side view of the rotor support structure in an embodiment of the present invention.

[0025] Figure 7 A front view schematic diagram of the rotor support structure in an embodiment of this utility model is shown.

[0026] Figure 8 A rear view schematic diagram of the rotor support structure in an embodiment of this utility model is shown.

[0027] Figure 9 An embodiment of the present invention is shown. Figure 8 The schematic diagram of the rotor support structure along section line AA.

[0028] Figure 10 An embodiment of the present invention is shown. Figure 8 The schematic diagram of the rotor support structure along the cross-sectional line BB is shown.

[0029] Explanation of reference numerals in the attached figures:

[0030] 10. Outer journal; 10a. Outer surface; 101. Cooling tank; 101a. First cooling tank; 101b. Second cooling tank; 102. Through hole; 103. Liquid outlet hole; 103a. First liquid outlet hole; 103b. Second liquid outlet hole; 104. First groove; 105. Second groove; 106. First through groove; 107. Second through groove; 20. Inner journal; 21. Flange section; 22. Journal Section; 221, Bearing mounting section; 222, Resolver rotor mounting section; 223, Oil pump interface section; 2231, First flat surface; 2232, First curved surface; 201, Liquid inlet hole; 202, Pin hole; 203, Weight reduction hole; 204, Center hole; 30, Intermediate connection part; 301, Bridging hole; 301a, First bridging hole; 301b, Second bridging hole; 302, Bypass hole; 31, Bridging part. Detailed Implementation

[0031] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided to make this application more comprehensive and complete, and to fully convey the concept of the exemplary embodiments to those skilled in the art.

[0032] Furthermore, the described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a thorough understanding of embodiments of this application. However, those skilled in the art will recognize that the technical solutions of this application can be practiced without one or more of the specific details, or other methods, components, apparatuses, steps, etc., can be employed. In other instances, well-known methods, apparatuses, implementations, or operations are not shown or described in detail to avoid obscuring various aspects of this application.

[0033] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments. It should be noted that the technical features involved in the various embodiments described below can be combined with each other as long as they do not conflict with each other. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present application, and should not be construed as limiting the present application.

[0034] Combination Figure 1 and Figure 10 As shown, this embodiment provides a rotor support structure, which is a component of the motor and works in conjunction with the motor's stator and other structures to achieve the motor's power output function. The rotor support structure can be used to install magnet assemblies (not shown in the figure).

[0035] Combination Figure 1 As shown, the rotor support structure includes an outer journal 10, which includes an outer surface 10a and an inner surface disposed opposite to each other. The outer surface 10a and the inner surface are arranged radially apart along the outer journal 10, and when the rotor support structure is used in conjunction with the magnet assembly, the outer surface 10a is closer to the magnet assembly relative to the inner surface along the radial direction of the outer journal 10.

[0036] Combination Figure 1 As shown, the outer surface 10a of the outer journal 10 is provided with a cooling groove 101, which is arranged around the axis of the outer journal 10. The outer journal 10 is provided with a through hole 102 and a liquid outlet hole 103, one end of which is connected to the cooling groove 101. The inner surface of the outer journal 10 is also the wall of the through hole 102.

[0037] In this embodiment, the outer journal 10 is annular. The cooling groove 101 is arranged around the entire outer journal 10, and the liquid outlet hole 103 penetrates the inner surface and outer surface 10a of the outer journal 10 radially.

[0038] Combination Figure 1As shown, the rotor support structure also includes an inner journal 20, which passes through the through hole 102. The inner journal 20 is spaced apart from the outer journal 10, and a liquid inlet hole 201 is provided in the inner journal 20. Along the axial direction of the outer journal 10, the length of the inner journal 20 is greater than the length of the outer journal 10 to accommodate other components. The diameter of the inner journal 20 is smaller than the diameter of the outer journal 10.

[0039] Combination Figure 1 and Figure 9 As shown, the rotor support structure also includes an intermediate connecting part 30, which is connected between the outer journal 10 and the inner journal 20. The intermediate connecting part 30 is provided with a bridging hole 301, which is connected between the liquid outlet hole 103 and the liquid inlet hole 201.

[0040] In this invention, firstly, when the rotor support structure requires cooling, coolant enters the inner journal 20 through the inlet hole 201, then enters the intermediate connecting portion 30 through the bridging hole 301, and then enters the outer journal 10 through the outlet hole 103, thereby achieving cooling of the rotor support structure from its internal space. Next, it flows into the cooling tank 101 through the outlet hole 103, achieving cooling of the rotor support structure from the outer surface 10a of the outer journal 10. Ultimately, the coolant can cool the rotor support structure from both its internal space and external surface, thus significantly improving the cooling efficiency of the rotor support structure.

[0041] Since the cooling tank 101 is arranged around the axis of the outer journal 10, the coolant flowing into the cooling tank 101 can flow synchronously around the axis of the outer journal 10 in the cooling tank 101 under the action of centripetal force when the rotor support structure rotates, so as to ensure that the coolant cools the rotor support structure without disrupting the dynamic balance of the rotor support structure.

[0042] In some embodiments, there may be multiple liquid outlet holes 103, each of which extends radially through the outer journal 10 and connects the cooling tank 101 and the bridging hole 301. The multiple liquid outlet holes 103 are spaced apart from each other along the side circumferential surface of the outer journal 10, and the spacing between two adjacent liquid outlet holes 103 may be equal.

[0043] It should be understood that when there are multiple outlet holes 103, and the multiple outlet holes 103 are spaced apart from each other along the side circumferential surface of the outer shaft journal 10, and the spacing between two adjacent outlet holes 103 is equal, and all of them are connected to the cooling tank 101 and the bridging hole 301, coolant can be sprayed quickly and evenly into the cooling tank 101 when the rotor support structure rotates.

[0044] In this embodiment, combined with Figure 5 and Figure 6 As shown, combined with Figure 4 and Figure 5 As shown, there are two outlet holes 103, namely, the outlet holes 103 include a first outlet hole 103a and a second outlet hole 103b. The first outlet hole 103a and the second outlet hole 103b are both connected to the bridging hole 301 and the cooling tank 101. The first outlet hole 103a and the second outlet hole 103b are located at the two ends of the diameter line segment of the outer journal 10, thereby ensuring that the coolant is sprayed into the cooling tank 101 quickly and evenly, while reducing the impact of the opening of the outer journal 10 on the strength of the outer journal 10.

[0045] In some embodiments, the outer surface 10a of the outer journal 10 may be provided with a plurality of cooling grooves 101, which are spaced apart from each other along the axial direction of the outer journal 10, and the distance between two adjacent cooling grooves 101 may be equal. When the outer surface 10a of the outer journal 10 is provided with a plurality of cooling grooves 101, each of the plurality of cooling grooves 101 is connected to an inlet hole 201 via at least one outlet hole 103 and a bridging hole 301, so that coolant can enter each cooling groove 101.

[0046] It should be understood that when there are multiple cooling tanks 101, and the coolant can enter each cooling tank 101, the cooling efficiency of the rotor support structure can be improved again.

[0047] In this embodiment, combined with Figure 5 and Figure 6 As shown, there are two cooling tanks 101, namely, a first cooling tank 101a and a second cooling tank 101b. The first cooling tank 101a and the second cooling tank 101b are both arranged around the axis of the outer journal 10 and are spaced apart from each other along the axial direction of the outer journal 10. The first liquid outlet 103a is connected to the first cooling tank 101a; the second liquid outlet 103b is connected to the second cooling tank 101b, so as to improve the cooling efficiency of the rotor support structure and further reduce the impact of the slot on the strength of the outer journal 10.

[0048] Combination Figure 5 and Figure 6As shown, the outer surface 10a of the outer journal 10 is also provided with a first groove 104 and a second groove 105, both extending along the axial direction of the outer journal 10. The first groove 104 connects the first outlet hole 103a and the first cooling tank 101a, so that the coolant flowing out of the first outlet hole 103a flows into the first cooling tank 101a after passing through the first groove 104. The second groove 105 connects the second outlet hole 103b and the second cooling tank 101b, so that the coolant flowing out of the second outlet hole 103b flows into the second cooling tank 101b after passing through the second groove 105.

[0049] Combination Figure 5 and Figure 6 As shown, the outer surface 10a of the outer journal 10 is also provided with a first through groove 106 and a second through groove 107, both of which extend along the axial direction of the outer journal 10. One end of the first through groove 106 is connected to the first cooling tank 101a, and the other end extends along the axial direction of the outer journal 10 away from the second cooling tank 101b, penetrating the end face of the outer journal 10 so that the coolant flowing into the first cooling tank 101a can flow out of the rotor support structure through the first through groove 106. One end of the second through groove 107 is connected to the second cooling tank 101b, and the other end extends along the axial direction of the outer journal 10 away from the first cooling tank 101a, penetrating the end face of the outer journal 10 so that the coolant flowing into the second cooling tank 101b can flow out of the rotor support structure through the second through groove 107.

[0050] In this embodiment, the first through groove 106 is disposed opposite to the second groove 105 along the axial direction of the outer shaft neck 10, and the second through groove 107 is disposed opposite to the first groove 104 along the axial direction of the outer shaft neck 10.

[0051] Furthermore, combined Figure 5 , Figure 6 and Figure 10 As shown, the first liquid outlet 103a and the second liquid outlet 103b are coaxially arranged; the outlets of the first liquid outlet 103a and the second liquid outlet 103b are spaced apart from the first cooling tank 101a and spaced apart from the second cooling tank 101b; the first cooling tank 101a and the second cooling tank 101b are symmetrically arranged about the axis of the first liquid outlet 103a along the axial direction of the outer shaft neck 10, so that the time for the coolant flowing out of the first liquid outlet 103a to flow into the first cooling tank 101a is almost the same as the time for the coolant flowing out of the second liquid outlet 103b to flow into the second cooling tank 101b.

[0052] Meanwhile, since the first cooling tank 101a and the second cooling tank 101b are symmetrically arranged along the axial direction of the outer shaft journal 10 about the axis of the first liquid outlet 103a, the rotor support structure can also achieve smooth rotation while the coolant flows from the first liquid outlet 103a to the first cooling tank 101a and from the second liquid outlet 103b to the second cooling tank 101b. This almost avoids the phenomenon of the rotor support structure moving eccentrically due to the uneven gravity on one side.

[0053] Combination Figure 9 and Figure 10 As shown, the bridging hole 301 includes a first bridging hole 301a and a second bridging hole 301b. The first bridging hole 301a connects the inlet hole 201 and the first outlet hole 103a, so that the coolant can enter the first outlet hole 103a after passing through the first bridging hole 301a. The second bridging hole 301b connects the inlet hole 201 and the second outlet hole 103b, so that the coolant can enter the second outlet hole 103b after passing through the second bridging hole 301b.

[0054] Combination Figure 10 As shown, the first bridging hole 301a, the second bridging hole 301b, the first outlet hole 103a, and the second outlet hole 103b are coaxially arranged. In this embodiment, along the axial direction of the outer journal 10, the axis of the first bridging hole 301a can divide the outer journal 10 and the intermediate connecting portion 30 into two parts of the same thickness, so that when the coolant flows in the first bridging hole 301a, the second bridging hole 301b, the first outlet hole 103a, and the second outlet hole 103b, the rotor support structure is subjected to uniform force on both sides of the axial direction of the outer journal 10 with the axial direction of the first bridging hole 301a as the center line.

[0055] Furthermore, the axis of the first bridging hole 301a and the axis of the second bridging hole 301b pass through the axis of the outer journal 10. That is, the axis of the first bridging hole 301a and the axis of the second bridging hole 301b both coincide with a certain diameter segment of the outer journal 10, so that when the coolant flows in the first bridging hole 301a and the second bridging hole 301b, with the axial direction of the first bridging hole 301a as the center line, the rotor support structure is subjected to uniform force on both sides of the radial direction of the outer journal 10.

[0056] In this embodiment, the diameters of the first bridging hole 301a, the second bridging hole 301b, the first liquid outlet hole 103a, and the second liquid outlet hole 103b are all equal.

[0057] Furthermore, the axis of the inner journal 20, the axis of the inlet hole 201, and the axis of the outer journal 10 coincide, so that when the coolant flows in the inlet hole 201 and when the coolant flows in the inner journal 20, the dynamic balance between the inner journal 20 and the outer journal 10 is hardly disrupted.

[0058] Combination Figure 2 As shown, the intermediate connecting part 30 is also provided with a bypass hole 302. The bypass hole 302 is arranged at intervals with the liquid inlet hole 201 along the radial direction of the outer journal 10. One end of the bypass hole 302 is connected to the first bridging hole 301a or the second bridging hole 301b, and the other end of the bypass hole 302 passes through the surface of the intermediate connecting part 30 along the axial direction of the outer journal 10 for cooling the bearing sleeved on the inner journal 20.

[0059] In this embodiment, the distance between the bypass hole 302 and the liquid inlet hole 201 can be determined according to the size of the bearing installed on the inner journal 20, so that after the bearing is sleeved on the inner journal 20, the coolant flowing into the bypass hole 302 through the first bridging hole 301a or the second bridging hole 301b can flow to the bearing and cool it.

[0060] Furthermore, combined Figures 1 to 4 As shown, the intermediate connecting part 30 includes multiple bridging parts 31, which are connected between the outer journal 10 and the inner journal 20. The bridging parts 31 are spaced apart, so that the outer journal 10, the inner journal 20 and the intermediate connecting part 30 can form a hub-like structure, which ensures the connection between the outer journal 10 and the inner journal 20 while also making the overall stress of the rotor support structure uniform.

[0061] Combination Figures 1 to 4 as well as Figure 10 As shown, one of the multiple bridging portions 31 is provided with a first bridging hole 301a, and the other bridging portion 31 is provided with a second bridging hole 301b. The bridging portion 31 with the first bridging hole 301a and the bridging portion 31 with the second bridging hole 301b are arranged radially opposite each other along the outer journal 10 to ensure that the first bridging hole 301a and the second bridging hole 301b can be coaxially arranged.

[0062] Combination Figures 1 to 4 As shown, the inner journal 20 includes a flange section 21 and a journal section 22. The flange and the journal section 22 are located on two opposite sides of the intermediate connecting part 30 along the axial direction of the outer journal 10.

[0063] Combination Figures 1 to 4As shown, flange section 21 is provided with pin holes 202, multiple weight-reducing holes 203, and a center hole 204. The pin holes 202, multiple weight-reducing holes 203, and center hole 204 are spaced apart from each other, and each of the multiple weight-reducing holes 203 surrounds the center hole 204. The pin holes 202 and center hole 204 are used for connection with other structures of the motor, and the multiple weight-reducing holes 203 are used to reduce the weight of the rotor support structure.

[0064] Combination Figures 5 to 8 As shown, the journal section 22 includes a bearing mounting section 221, a resolver rotor mounting section 222, and an oil pump interface section 223 arranged sequentially. The diameter of the bearing mounting section 221 is larger than the diameter of the resolver rotor mounting section 222. The bearing mounting section 221 is used for an interference fit connection with the bearing, the resolver rotor mounting section 222 is used for an interference fit connection with the resolver rotor, and the oil pump interface section 223 is used for a flat-square connection with the rotor drive interface inside the oil pump.

[0065] Combination Figure 7 As shown, the oil pump interface section 223 includes a first flat surface 2231 arranged radially, which is used to connect with the internal rotor of the oil pump.

[0066] For example, the oil pump interface section 223 includes two first flat surfaces 2231 arranged radially opposite each other, and a first curved surface 2232 connected between the two first flat surfaces 2231. The inner hole of the oil pump inner rotor also has a second flat surface that mates with the first flat surface 2231, and a second curved surface that mates with the first curved surface 2232. When the oil pump interface section 223 is fitted onto the oil pump inner rotor, the first flat surface 2231 and the second flat surface are fitted one-to-one, and the first curved surface 2232 and the second curved surface are fitted one-to-one, thereby realizing the flat rectangular connection between the oil pump interface section 223 and the oil pump inner rotor. Finally, when the rotor support structure rotates at high speed, it achieves stable support for the rotor support structure and prevents the oil pump interface section 223 and the oil pump inner rotor from spinning idly relative to each other.

[0067] In this invention, when the rotor support structure needs cooling, the coolant can enter the interior of the inner journal 20 through the inlet hole 201. Then, a portion of the coolant enters the first cooling tank 101a through the first bridging hole 301a and the first outlet hole 103a, while another portion enters the second cooling tank 101b through the second bridging hole 301b and the second outlet hole 103b. The coolant can flow in the first cooling tank 101a and the second cooling tank 101b when the rotor support structure rotates, thereby cooling the interior and outer surface 10a of the rotor support structure and significantly improving the cooling efficiency of the rotor support structure.

[0068] Furthermore, both the first cooling tank 101a and the second cooling tank 101b are annular grooves arranged around the axis of the outer journal 10, and the axis of the outer journal 10 coincides with the axis of the inner journal 20 and the axis of the liquid inlet 201. The first liquid outlet 103a, the second liquid outlet 103b, the first bridging hole 301a and the second bridging hole 301b are coaxially arranged, and the axis of the first bridging hole 301a and the axis of the second bridging hole 301b pass through the axis of the outer journal 10. The first cooling tank 101a and the second cooling tank 101b are symmetrically arranged along the axis of the outer journal 10 about the axis of the first liquid outlet 103a, thereby ensuring that the coolant cools the rotor support structure while almost not disrupting the dynamic balance of the rotor support structure.

[0069] Furthermore, after the magnet assembly is installed on the outer surface 10a of the outer journal 10, the coolant in the cooling tank 101 can also facilitate the cooling of the magnet assembly.

[0070] In addition, when the bearing is fitted onto the bearing mounting section 221 of the inner journal 20, the cooling oil flowing into the bypass hole 302 through the first bridging hole 301a or the second bridging hole 301b can flow to the bearing and achieve the purpose of cooling the bearing.

[0071] In summary, the rotor support structure not only significantly improves the cooling efficiency of the rotor support structure, but also ensures that the coolant will hardly disrupt the dynamic balance of the rotor support structure while cooling it, and facilitates the cooling of the magnet assembly and the bearing installed in the inner journal 20.

[0072] This embodiment also provides a motor, including a magnet assembly and the rotor support structure described above, wherein the magnet assembly is connected to the rotor support structure.

[0073] In this embodiment, the magnet assembly includes a housing and a plurality of magnets, which are correspondingly installed in a plurality of mounting slots in the housing. The housing is annular in shape. The housing is sleeved on the outer surface 10a of the outer journal 10 of the rotor support structure and is interference-fitted with the outer journal 10 of the rotor support structure.

[0074] It should be understood that when the outer housing is fitted onto the outer journal 10, the inner surface of the outer housing in contact with the outer journal 10 will form an annular oil passage with the mounting groove, thereby allowing the coolant to cool the rotor support structure while also cooling the magnets inside the outer housing.

[0075] In this embodiment, the motor also includes a stator, which cooperates with a rotor support structure fitted with magnet components to realize the motor's driving function.

[0076] This embodiment also provides a vehicle, including an oil pump and the aforementioned motor. The oil pump is connected to the inner journal 20 for supplying coolant to the outlet port 103. The coolant may be cooling oil.

[0077] For other aspects of the vehicle's structure, please refer to existing technology; details will not be elaborated here.

[0078] In this application, unless otherwise expressly specified and limited, the terms "assembly," "connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0079] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. "A plurality of" means two or more, unless otherwise explicitly specified. The terms "some embodiments," "exemplarily," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application.

[0080] The illustrative expressions of the terms used above do not necessarily refer to the same embodiments or examples. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, those skilled in the art can combine and integrate the different embodiments or examples described herein, as well as the features of those different embodiments or examples, without contradiction.

[0081] Although embodiments of this application have been shown and described above, it should be understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application. Therefore, any changes or modifications made in accordance with the claims and description of this application should fall within the scope of the patent coverage of this application.

Claims

1. A rotor support structure, characterized in that, include: The outer journal has a cooling groove on its outer surface, which is arranged around the axis of the outer journal. The outer journal has a through hole and a liquid outlet hole, one end of which is connected to the cooling groove. An inner journal, which passes through the through hole, is spaced apart from the outer journal, and has a liquid inlet hole inside the inner journal; An intermediate connecting part is provided between the outer journal and the inner journal, and the intermediate connecting part is provided with a bridging hole, which communicates between the liquid outlet and the liquid inlet.

2. The rotor support structure according to claim 1, characterized in that, The liquid outlet includes a first liquid outlet and a second liquid outlet. Both the first liquid outlet and the second liquid outlet are connected to the bridging hole and the cooling tank. The first liquid outlet and the second liquid outlet are located at the two ends of the diameter line segment of the outer journal.

3. The rotor support structure according to claim 2, characterized in that, The cooling tank includes a first cooling tank and a second cooling tank. Both the first cooling tank and the second cooling tank are arranged around the axis of the outer journal and are spaced apart from each other along the axial direction of the outer journal. The first liquid outlet is connected to the first cooling tank; The second liquid outlet is connected to the second cooling tank.

4. The rotor support structure according to claim 3, characterized in that, The first liquid outlet and the second liquid outlet are coaxially arranged; the outlet of the first liquid outlet and the outlet of the second liquid outlet are both spaced apart from the first cooling tank and also spaced apart from the second cooling tank. The first cooling tank and the second cooling tank are symmetrically arranged about the axis of the first liquid outlet hole along the axial direction of the outer journal.

5. The rotor support structure according to claim 2, characterized in that, The bridging hole includes a first bridging hole and a second bridging hole, wherein the first bridging hole connects the liquid inlet hole and the first liquid outlet hole, and the second bridging hole connects the liquid inlet hole and the second liquid outlet hole; The first bridging hole, the second bridging hole, the first liquid outlet hole, and the second liquid outlet hole are coaxially arranged, and the axis of the first bridging hole and the axis of the second bridging hole pass through the axis of the outer shaft journal. The axis of the inner journal, the axis of the liquid inlet, and the axis of the outer journal coincide.

6. The rotor support structure according to claim 5, characterized in that, The intermediate connecting part is also provided with a bypass hole, which is arranged at intervals with the liquid inlet hole along the radial direction of the outer journal. One end of the bypass hole is connected to the first bridging hole or the second bridging hole, and the other end of the bypass hole passes through the surface of the intermediate connecting part along the axial direction of the outer journal.

7. The rotor support structure according to claim 5, characterized in that, The intermediate connecting portion includes multiple bridging portions, which are connected between the outer journal and the inner journal, and the multiple bridging portions are spaced apart. One of the plurality of bridging portions is provided with the first bridging hole, and the other bridging portion is provided with the second bridging hole.

8. The rotor support structure according to claim 1, characterized in that, The inner journal includes a flange section and a journal section, and the flange and the journal section are located on two opposite sides of the intermediate connecting part along the axial direction of the outer journal. The flange section is provided with a pin hole, a plurality of weight-reducing holes and a center hole. The pin hole, the plurality of weight-reducing holes and the center hole are spaced apart from each other, and each of the plurality of weight-reducing holes is arranged around the center hole. The journal section includes a bearing mounting section, a resolver rotor mounting section, and an oil pump interface section arranged sequentially. The diameter of the bearing mounting section is larger than the diameter of the resolver rotor mounting section. The oil pump interface section includes a first flat surface arranged radially, which is used to connect with the rotor inside the oil pump.

9. An electric motor, characterized in that, It includes a magnet assembly and a rotor support structure as described in any one of claims 1-8, wherein the magnet assembly is sleeved on the outer surface of the outer shaft journal.

10. A vehicle, characterized in that, It includes an inner rotor of an oil pump and the motor as described in claim 9, wherein the inner rotor of the oil pump is connected to the inner journal.

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