Motor rotor support, motor and vehicle

Abstract

This utility model relates to a motor rotor bracket, a motor, and a vehicle, including a rotating shaft and a mounting component for interference fit connection with the rotor core. The mounting component is a cylindrical structure with one end open and the other end closed. The rotating shaft is coaxially inserted into the mounting component and fixedly connected to the closed end of the mounting component. Compared with the method of fixing the rotor core using an end cap and spring clip, this solution for the motor rotor bracket, motor, and vehicle can install the rotor core without adding additional components, and the assembly efficiency of the rotor core and motor rotor bracket can be improved.

Description

Technical Field

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

[0002] Currently, most motor rotor supports are cast in one piece. However, cast one-piece rotor supports have a relatively low modulus of elasticity, and the rotor core installation requires a clearance fit. Therefore, end cap snap rings are often used to fix the rotor core. However, this method of fixing the rotor core not only increases the number of parts needed to install the rotor core but also affects the assembly efficiency of the rotor core and the motor rotor support. Utility Model Content

[0003] The purpose of this utility model is to provide a motor rotor bracket, a motor, and a vehicle. Compared with the use of end cap snap rings to fix the rotor core, the rotor core can be installed without adding additional parts, and the assembly efficiency of the rotor core and the motor rotor bracket can be improved.

[0004] The first aspect of this utility model discloses a motor rotor support, including a rotating shaft and a mounting component for interference fit connection with the rotor core. The mounting component is a cylindrical structure with one end open and the other end closed. The rotating shaft is coaxially inserted into the mounting component and is fixedly connected to the closed end of the mounting component.

[0005] In one exemplary embodiment, a support ring is coaxially disposed on the inner surface of the mounting member, and the outer peripheral wall of the support ring contacts the inner surface of the mounting member.

[0006] In one exemplary embodiment, the support ring is provided with a plurality of first oil outlet holes, which are spaced apart from each other on the support ring; the first oil outlet holes communicate with the inside and outside of the mounting component.

[0007] In one exemplary embodiment, the mounting component includes a bottom shell and a frame, the frame being connected to the bottom shell and used for an interference fit connection with the rotor core, the bottom shell being the closed end of the mounting component and connected to the rotating shaft; the bottom shell is provided with a plurality of second oil outlet holes, the plurality of second oil outlet holes being spaced apart from each other; the second oil outlet holes communicate with the inside and outside of the mounting component.

[0008] In one exemplary embodiment, along the axial direction of the rotating shaft: the first oil outlet hole and the second oil outlet hole are disposed opposite each other.

[0009] In one exemplary embodiment, the axis of the first oil outlet and the axis of the second oil outlet are inclined from the inner surface of the mounting member toward the outer surface of the mounting member.

[0010] In one exemplary embodiment, the bottom shell includes a bottom plate and a folded edge portion connected to each other. The bottom plate has a through hole, and the folded edge portion is connected to the bottom plate and arranged around the through hole. The rotating shaft passes through the through hole into the mounting member and is welded to the folded edge portion.

[0011] In one exemplary embodiment, the bottom shell and the frame are metal structures and are integrally stamped structures.

[0012] The second aspect of this utility model discloses an electric motor, including a rotor core and the aforementioned motor rotor bracket, wherein the rotor core is sleeved on the mounting component and is interference-fitted with the mounting component.

[0013] The third aspect of this utility model discloses a vehicle, including a frame and the aforementioned motor, wherein the motor is connected to the frame.

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

[0015] In this utility model, the mounting component for mounting the rotor core is configured with one end open and the other end closed as a cylindrical structure, which facilitates the interference fit connection between the rotor core and the mounting component. Therefore, compared with the use of end cap snap rings to fix the rotor core, the rotor core can be installed without adding additional parts, and the assembly efficiency of the rotor core and the motor rotor bracket can be improved.

[0016] 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

[0017] 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.

[0018] Figure 1 A three-dimensional structural schematic diagram of the motor rotor support in an embodiment of this utility model is shown.

[0019] Figure 2 This diagram shows a three-dimensional structural schematic of the motor rotor bracket in an embodiment of the present invention from another perspective.

[0020] Figure 3 A cross-sectional view of the motor rotor support in an embodiment of the present invention is shown.

[0021] Explanation of reference numerals in the attached figures:

[0022] 11. Mounting component; 111. Bottom shell; 1111. Base plate; 1112. Folded edge; 112. Frame; 1121. Outer surface; 1122. Inner surface; 12. Support ring; 13. Rotating shaft; 101. Oil groove; 102. Oil drain hole; 103. Oil passage; 104. First oil outlet hole; 105. Second oil outlet hole. Detailed Implementation

[0023] 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.

[0024] 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.

[0025] 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.

[0026] Combination Figures 1 to 3 As shown in the figure, this embodiment discloses a motor rotor bracket, which is used to mount the rotor core. The rotor core includes a rotor iron core or a rotor core made of other materials.

[0027] Combination Figure 2 As shown, the motor rotor support includes a mounting component 11, which is a cylindrical structure with one end open and the other end closed.

[0028] Furthermore, combined Figure 1 and Figure 3 As shown, the mounting component 11 includes a base shell 111 and a frame 112, with the frame 112 connected to the base shell 111. The frame 112 includes an outer surface 1121 and an inner surface 1122, with the outer surface 1121 used for an interference fit connection with the rotor core.

[0029] For example, combined Figure 2 As shown, the bottom shell 111 and the frame 112 are integral metal stamping structures.

[0030] In this embodiment, the mounting part 11 is a stamped metal part. With low material cost, simpler stamping process, high process control, easier quality control in manufacturing process, high pass rate and low processing cost, it can also have a certain degree of flexibility.

[0031] For example, combined Figure 2 As shown, the frame 112 is a hollow structure, that is, the frame 112 has an upper opening and a lower opening along its height direction. After the frame 112 is connected to the bottom shell 111, the bottom shell 111 covers the lower opening of the frame 112 and retains the upper opening of the frame 112, thereby forming a cylindrical structure of mounting member 11 with one end open and the other end closed.

[0032] Of course, in other embodiments, the frame 112 may also be other non-cylindrical hollow frames, which also have an upper opening and a lower opening along its height direction. After the frame 112 is connected to the bottom shell 111, the bottom shell 111 covers the lower opening of the frame 112 and retains the upper opening of the frame 112. There are no restrictions here.

[0033] Combination Figure 1 and Figure 3 As shown, when the mounting part 11 is a stamped metal part, in order to compensate for the strength of the mounting part 11 without affecting the interference fit connection between the outer surface 1121 of the frame 112 and the rotor core, a support ring 12 is coaxially provided in the inner surface 1122 of the mounting part 11. The outer peripheral wall of the support ring 12 contacts and connects with the inner surface 1122 of the mounting part 11 and is used to support the frame 112. In this way, the risk of the frame 112 being squeezed and deforming significantly towards the center area can be reduced during the installation of the rotor core.

[0034] For example, the support ring 12 includes a circular ring structure or a rectangular ring structure; wherein, the circular ring structure or the rectangular ring structure can be a closed circular ring structure or a semi-closed circular ring structure or a rectangular ring structure.

[0035] It should be understood that the shape of the support ring 12 matches the shape of the frame 112 so that the support ring 12 can better support the frame 112.

[0036] For example, when the frame 112 is a hollow cylindrical structure, the support ring 12 can be a corresponding ring structure. In this case, the support ring 12 can fit against the inner surface 1122 of the frame 112, and the axis of the support ring 12 can coincide with the axis of the frame 112, so that the support ring 12 can support the frame 112 from the inside, reducing the risk of the frame 112 deforming significantly towards the center due to compression. When the frame 112 is a hollow rectangular structure, the support ring 12 can be a corresponding rectangular ring structure. In this case, the support ring 12 can fit against the inner surface 1122 of the frame 112, and the axis of the support ring 12 can coincide with the axis of the frame 112, so that the support ring 12 can support the frame 112 from the inside, reducing the risk of the frame 112 deforming significantly towards the center due to compression. When the frame 112 has other shapes, the shape of the support ring 12 follows the same pattern.

[0037] In this embodiment, the support ring 12 is a metal stamping structure.

[0038] Furthermore, the motor rotor bracket also includes a rotating shaft 13, which is coaxially inserted inside the mounting component 11 and is fixedly connected to the closed end of the mounting component 11.

[0039] Furthermore, the rotating shaft 13 is connected to the bottom shell 111, and at least part of the rotating shaft 13 is located inside the frame 112, and is provided with an oil drain hole 102 communicating with the oil groove 101. The two ends of the rotating shaft 13 respectively pass through the lower opening and the upper opening of the mounting member 11 to facilitate connection with other components.

[0040] It should be understood that the oil drain hole 102 of the rotating shaft 13 can be used to communicate with the oil pump, so that the cooling oil of the oil pump can be discharged into the oil tank 101 through the oil drain hole 102, so as to cool the rotor core disposed on the frame 112 through the frame 112.

[0041] For example, along the axial direction of the rotating shaft 13, the internal space of the rotating shaft 13 is provided with an oil passage 103 that communicates with the oil drain hole 102. The oil passage 103 is connected to the oil outlet of the oil pump to receive the cooling oil flowing out of the oil pump, and then discharge it into the oil tank 101 through the oil drain hole 102.

[0042] In this invention, by setting the mounting part for mounting the rotor core as a mounting member 11, the elasticity of the outer surface 1121 of the mounting member 11 can be used to make an interference fit connection with the rotor core, thereby reducing the number of parts used for mounting the rotor core. Simultaneously, a support ring 12 is connected to the inner surface 1122 of the mounting member 11. The support ring 12 and the bottom shell 111 can jointly support the frame 112, thus ensuring the strength of the mounting member 11 while satisfying the interference fit connection between the mounting member 11 and the rotor core. Furthermore, the support ring 12 is positioned opposite to the bottom shell 111, and an oil groove 101 is provided between them. The oil drain hole 102 of the rotating shaft 13 communicates with the oil groove 101, allowing cooling oil to flow within the oil groove 101 between the support ring 12 and the bottom shell 111 to cool the rotor core on the outer surface 1121. Therefore, this motor rotor bracket can achieve efficient assembly of the motor rotor bracket and the rotor core without changing the cooling efficiency of the motor rotor core or reducing the strength of the motor rotor bracket.

[0043] In this embodiment, the support ring 12 is a circular ring structure, which makes it easier to match the cylindrical frame 112, and its support performance is better than that of support rings 12 of other shapes.

[0044] Furthermore, the support ring 12 is arranged around the rotating shaft 13, thereby forming an annular groove between the support ring 12 and the bottom shell 111 on the opposite side. After the rotating shaft 13 is sprayed with oil, the oil can flow in the annular groove under the action of the centrifugal force generated when the motor rotor rotates, thereby cooling the rotor core.

[0045] Furthermore, the support ring 12 and the rotating shaft 13 are spaced apart, which facilitates the installation of other components on the rotating shaft 13 in the oil tank 101, while also achieving the effects of weight reduction and heat dissipation holes.

[0046] For example, the rotating shaft 13 includes a first mounting section with an oil drain hole 102, a second mounting section for mounting bearings, and a third mounting section, all of which are located within the oil groove 101.

[0047] It should be understood that, in combination Figure 1 As shown, the distance between the support ring 12 and the rotating shaft 13 can be determined by referring to the size of the bearing to be installed on the second mounting section, so that the bearing can enter the oil groove 101.

[0048] Furthermore, the support ring 12 is provided with a plurality of first oil outlet holes 104, which are spaced apart from each other, and each first oil outlet hole 104 is connected to the inside and outside of the oil tank 101 to discharge the oil in the oil tank 101 to the outside of the oil tank 101.

[0049] In this embodiment, a plurality of first oil outlet holes 104 are distributed at equal intervals on the support ring 12 so that the oil can be evenly discharged from the oil tank 101 to the outside of the oil tank 101.

[0050] Furthermore, the bottom shell 111 is provided with a plurality of second oil outlet holes 105, which are spaced apart from each other on the bottom shell 111. The second oil outlet holes 105 connect the inside and outside of the oil tank 101, so that the oil in the oil tank 101 can be discharged from one side of the support ring 12 to the outside of the oil tank 101, and can also be discharged from one side of the bottom shell 111 to the outside of the oil tank 101.

[0051] In this embodiment, a plurality of second oil outlet holes 105 are distributed at equal intervals on the bottom shell 111 so that the oil can be evenly discharged from the oil tank 101 to the outside of the oil tank 101.

[0052] Furthermore, the vertical distance between the oil drain hole 102 of the rotating shaft 13 and the bottom shell 111 is equal to the vertical distance between the oil drain hole 102 and the support ring 12, so that the distance the oil discharged from the oil drain hole 102 travels to the bottom shell 111 is almost the same as the distance the oil discharged from the oil drain hole 102 travels to the support ring 12, thereby enabling the motor rotor bracket to rotate smoothly when rotating.

[0053] In this embodiment, along the direction from the bottom shell 111 to the frame 112, the first oil outlet 104 and the second oil outlet 105 are arranged opposite to each other, which can almost avoid the damage to the dynamic balance of the motor rotor bracket after the bottom shell 111 and the support ring 12 are opened.

[0054] Furthermore, the axes of the first oil outlet 104 and the second oil outlet 105 are inclined from the inner surface 1122 toward the outer surface 1121. Specifically, the distance between the axis of the first oil outlet 104 and the axis of the rotating shaft 13 gradually increases from the bottom shell 111 toward the support ring 12, and the distance between the axis of the second oil outlet 105 and the axis of the rotating shaft 13 gradually increases from the support ring 12 toward the bottom shell 111. This allows oil to exit from both the first oil outlet 104 and the second oil outlet 105 in a direction away from the rotating shaft 13, so that while oil is exiting from the first oil outlet 104 and the second oil outlet 105, other components on the outer surface 1121 of the motor rotor bracket can be cooled.

[0055] Furthermore, combined Figure 3 As shown, the bottom shell 111 includes a bottom plate 1111 and a folded edge 1112 connected to each other. The bottom plate 1111 is provided with a through hole, and the folded edge 1112 is located on the side of the bottom plate 1111 facing the support ring 12 and is arranged around the through hole. The rotating shaft 13 passes through the through hole into the oil groove 101 and is welded to the folded edge 1112, thereby increasing the welding area between the bottom shell 111 and the rotating shaft 13.

[0056] For example, when welding the shaft 13 to the base shell 111, the shaft 13 and the base shell 111 can be fixed in a designated position by tooling before welding, and then the connection part is welded to ensure its axial and radial positional accuracy. After welding, the shaft is inverted and the other side is welded, and its strength is ensured by double-sided welding.

[0057] In this invention, cooling oil can enter through the rotating shaft 13 and be ejected from the radial drain hole 102 of the rotating shaft 13 to spray into the central area of ​​the oil tank 101. Since the bottom shell 111 and the support ring 12 form an annular oil tank 101 with the inner surface 1122 of the frame 112 inside the mounting part 11, combined with the characteristics of the centrifugal force of the rotating motor rotor, the cooling oil can accumulate in the annular oil tank 101, forming a cooling effect on the rotor core. After the oil accumulates to a certain height, the oil flows out through the first oil outlet hole 104 of the support ring 12 and the second oil outlet hole 105 of the bottom shell 111. Then, under the action of the centrifugal force, the oil splashes circumferentially to the outer motor stator winding, completing the cooling function of the motor stator.

[0058] Both mounting component 11 and support ring 12 are stamped parts, resulting in lower material costs. The stamping process is simpler, with higher process control, easier quality control during manufacturing, higher pass rate, lower scrap rate, and lower processing and manufacturing costs. Furthermore, because the motor rotor bracket uses stamped parts, it is lighter overall than cast parts, reducing the overall moment of inertia. It also changes the way the rotor core is fixed to the motor rotor bracket, reducing the need for end plates and compression springs required when installing a cast rotor bracket, further reducing costs and weight, and decreasing the overall moment of inertia.

[0059] This embodiment also provides an electric motor, including a rotor core and a motor rotor bracket as described in the above embodiment. The rotor core is sleeved on the outer surface 1121 and is interference-fitted with the outer surface 1121.

[0060] For details regarding the motor's other structure and working principle, please refer to existing technologies; they will not be elaborated upon here.

[0061] This embodiment also provides a vehicle, including a frame and a motor as described in the above embodiment, wherein the motor is connected to the frame.

[0062] For details regarding other structural and operational principles of the vehicle, please refer to existing technologies; they will not be elaborated upon here. In this application, unless otherwise explicitly 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 based on the specific circumstances.

[0063] 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.

[0064] 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.

[0065] 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 motor rotor support, comprising a rotating shaft, characterized in that: It also includes a mounting component for interference fit connection with the rotor core, the mounting component being a cylindrical structure with one end open and the other end closed; the rotating shaft is coaxially inserted inside the mounting component, and the rotating shaft is fixedly connected to the closed end of the mounting component.

2. The motor rotor bracket according to claim 1, characterized in that, A support ring is coaxially arranged on the inner surface of the mounting component, and the outer peripheral wall of the support ring is in contact with the inner surface of the mounting component.

3. The motor rotor bracket according to claim 2, characterized in that, The support ring is provided with a plurality of first oil outlet holes, which are spaced apart from each other on the support ring; The first oil outlet hole connects the inside and outside of the mounting component.

4. The motor rotor bracket according to claim 3, characterized in that, The mounting component includes a bottom shell and a frame. The frame is connected to the bottom shell and is used for an interference fit connection with the rotor core. The bottom shell is the closed end of the mounting component and is connected to the rotating shaft. The bottom shell is provided with a plurality of second oil outlet holes, which are spaced apart from each other. The second oil outlet hole connects the inside and outside of the mounting component.

5. The motor rotor bracket according to claim 4, characterized in that, Along the axial direction of the rotating shaft, the first oil outlet and the second oil outlet are arranged opposite to each other.

6. The motor rotor bracket according to claim 4, characterized in that, The axis of the first oil outlet and the axis of the second oil outlet are inclined from the inner surface of the mounting component toward the outer surface of the mounting component.

7. The motor rotor bracket according to claim 4, characterized in that, The bottom shell includes a bottom plate and a folded edge that are connected to each other. The bottom plate has a through hole, and the folded edge is connected to the bottom plate and surrounds the through hole. The rotating shaft passes through the through hole into the mounting component and is welded to the folded edge.

8. The motor rotor bracket according to any one of claims 4-7, characterized in that, The bottom shell and the frame are metal structures and are integrally stamped structures.

9. An electric motor, characterized in that, It includes a rotor core and a motor rotor bracket as described in any one of claims 1-8, wherein the rotor core is sleeved on the mounting member and is interference-fitted with the mounting member.

10. A vehicle, characterized in that, Includes the motor as described in claim 9.

Images