Driving motor rotor shaft and vehicle

Abstract

The utility model discloses a driving motor rotor shaft and a vehicle, and relates to the technical field of new energy automobile heat dissipation systems, a separation layer 2 is provided with a communication hole 5 enabling a heat dissipation cavity 3 and a hollow cavity 4 to be communicated, the communication hole 5 is located at one end of the heat dissipation cavity 3 and one end of the hollow cavity 4, and an injection port 301 is located at the other end of the heat dissipation cavity 3, so that the heat dissipation cavity 3 and the hollow cavity 4 are communicated through the communication hole 5; in other words, the injection port 301 of the cooling liquid and the outflow port 401 of the cooling liquid are both located at the same end of the rotor shaft of the driving motor, and therefore on the basis that the cooling effect is guaranteed, only one end of the rotor shaft of the driving motor needs to be sealed, and the two ends do not need to be sealed. And the sealing difficulty and the complexity of a heat dissipation system are reduced. In general, sealing devices are reduced while the temperature of the rotor shaft of the driving motor is reduced, the structure of a heat dissipation system is simplified, and NVH of the whole vehicle is optimized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of new energy vehicle heat dissipation system, in particular to a driving motor rotor shaft and vehicle. BACKGROUND

[0002] As the most important component of new energy vehicles, the performance of driving motor plays a crucial role in new energy vehicles.

[0003] With the improvement of technology, the existing driving motor can achieve higher and higher speed, and due to the friction between components and other physical factors, higher speed will generate more heat, and the heat dissipation problem is particularly important.

[0004] In the existing cooling method of the driving motor shaft, the cooling liquid generally flows into one end of the driving motor shaft and flows out from the other end, which causes both ends to be sealed, and the whole heat dissipation system is complex. CONTENT OF THE INVENTION

[0005] Therefore, the present application provides a driving motor rotor shaft and vehicle, which reduces the complexity of the heat dissipation system.

[0006] Specifically, the present application includes the following technical solutions:

[0007] The first aspect of the present application provides a driving motor rotor shaft, which comprises an outer shell and a separation layer, wherein,

[0008] The separation layer is annular in the inner shell and extends along the axial direction of the driving motor rotor shaft.

[0009] The outer shell and the separation layer form a heat dissipation cavity therebetween, and the outer shell is provided with an injection port in communication with the heat dissipation cavity, the injection port being used for injecting cooling liquid.

[0010] The separation layer forms a hollow cavity therein, and the outer shell is provided with an outlet port in communication with the hollow cavity, the outlet port being used for letting the cooling liquid flow out.

[0011] The separation layer is provided with a communication hole for communicating the heat dissipation cavity and the hollow cavity, wherein in the axial direction of the driving motor rotor shaft, the communication hole is located at one end of the heat dissipation cavity and the hollow cavity, the injection port is located at the other end of the heat dissipation cavity, and the outlet port is located at the other end of the hollow cavity.

[0012] Optionally, the hollow cavity and the heat dissipation cavity both extend along the axial direction of the driving motor rotor shaft and are axisymmetric.

[0013] Optionally, the driving motor rotor shaft comprises a plurality of injection ports.

[0014] Optionally, the driving motor rotor shaft comprises a plurality of communication holes.

[0015] Optionally, the inner diameter of the injection port is smaller than the outlet.

[0016] The application further provides a vehicle, which comprises a drive motor rotor shaft, and the drive motor rotor shaft comprises a shell and a separation layer, wherein,

[0017] The separation layer is annular inside the shell and extends along the axial direction of the drive motor rotor shaft.

[0018] The shell and the separation layer form a heat dissipation cavity therebetween, and the shell is provided with an injection port in communication with the heat dissipation cavity, the injection port being used for injecting the cooling liquid.

[0019] The separation layer is provided with a hollow cavity, and the shell is provided with an outlet in communication with the hollow cavity, the outlet being used for discharging the cooling liquid.

[0020] Optionally, the separation layer is provided with a communication hole for connecting the heat dissipation cavity and the hollow cavity, and in the axial direction of the drive motor rotor shaft, the communication hole is located at one end of the heat dissipation cavity and the hollow cavity, the injection port is located at the other end of the heat dissipation cavity, and the outlet is located at the other end of the hollow cavity.

[0021] Optionally, the hollow cavity and the heat dissipation cavity both extend along the axial direction of the drive motor rotor shaft and are axisymmetric.

[0022] Optionally, the drive motor rotor shaft comprises a plurality of injection ports.

[0023] Optionally, the drive motor rotor shaft comprises a plurality of communication holes.

[0024] Optionally, the inner diameter of the injection port is smaller than the outlet.

[0025] The drive motor rotor shaft provided by the application has the following advantages: the separation layer is provided with a communication hole for connecting the heat dissipation cavity and the hollow cavity, the communication hole is located at one end of the heat dissipation cavity and the hollow cavity, the injection port is located at the other end of the heat dissipation cavity, and the outlet is located at the other end of the hollow cavity, in other words, the injection port and the outlet of the cooling liquid are both located at the same end of the drive motor rotor shaft, so that the sealing of only one end of the drive motor rotor shaft is required on the basis of ensuring the cooling effect, and the sealing difficulty and the complexity of the heat dissipation system are reduced. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the application, the following will briefly introduce the drawings needed in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0027] Figure 1 A cross-sectional view of a driving motor rotor shaft is provided for the embodiment of the present application.

[0028] Figure 2 An external view of a driving motor rotor shaft is provided for the embodiment of the present application.

[0029] Figure 3 Another cross-sectional view of a driving motor rotor shaft is provided for the embodiment of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0031] 1 - housing;

[0032] 2 - separation layer;

[0033] 3 - heat dissipation cavity;

[0034] 301 - injection port;

[0035] 4 - hollow cavity;

[0036] 401 - flow outlet;

[0037] 5 - communication hole.

[0038] The specific embodiments of the present application have been shown in the above drawings, and will be described in more detail hereinafter. These drawings and textual descriptions are not intended to limit the scope of the concept of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without any creative effort fall within the scope of protection of the present application. In order to make the technical solutions and advantages of the present application more clear, the driving motor rotor shaft and the vehicle will be described in detail below in combination with the drawings.

[0040] The cooling liquid of the existing driving motor rotor shaft generally flows in from one end of the driving motor rotor shaft and flows out from the other end of the driving motor rotor shaft, resulting in that both ends of the driving motor rotor shaft need to be sealed, and the entire heat dissipation system is complex.

[0041] The embodiment of the present application provides a driving motor rotor shaft, as shown in Figure 1 Figure 1 is a cross-sectional view of the driving motor rotor shaft along the rotation axis, and the driving motor rotor shaft comprises a housing 1 and a separation layer 2, wherein,

[0042] ​The partition layer 2 is annular inside the shell 1 and extends along the axial direction of the driving motor rotor shaft.

[0043] The shell 1 and the partition layer 2 form a heat dissipation cavity 3, and the shell 1 is provided with an injection port 301 communicating with the heat dissipation cavity 3, which is used for injecting the cooling liquid.

[0044] The partition layer 2 is provided with a hollow cavity 4, and the shell 1 is provided with an outlet port 401 communicating with the hollow cavity 4, which is used for flowing out the cooling liquid.

[0045] The partition layer 2 is provided with a communication hole 5 communicating the heat dissipation cavity 3 and the hollow cavity 4, wherein the communication hole 5 is located at one end of the heat dissipation cavity 3 and the hollow cavity 4 in the axial direction of the driving motor rotor shaft, the injection port 301 is located at the other end of the heat dissipation cavity 3, and the outlet port 401 is located at the other end of the hollow cavity 4.

[0046] It can be understood that the cooling liquid flows through the heat dissipation cavity 3 after being injected from the injection port 301 to dissipate heat for the driving motor rotor shaft, and then flows through the hollow cavity 4 and is finally discharged through the outlet port 401.

[0047] In some optional embodiments, the hollow cavity 4 and the heat dissipation cavity 3 both extend along the axial direction of the driving motor rotor shaft and are axisymmetric, thereby ensuring that the shape of the driving motor rotor shaft is symmetrical and the mass is uniform, so that the driving motor rotor shaft does not produce additional noise during rotation, and the service life of the driving motor rotor shaft is increased.

[0048] In some optional embodiments, as shown in Figure 2 The driving motor rotor shaft includes a plurality of injection ports 301, thereby improving the flow of the injected cooling liquid and ensuring the heat dissipation effect. Figure 2 It is a schematic view observed from the outside of the shell 1 of the driving motor rotor shaft.

[0049] It can be understood that the injection port 301 can be a port with a rectangular cross-sectional shape after expansion, and a plurality of rectangular injection ports 301 are uniformly distributed on the shell 1 at certain intervals in the circumferential direction, and 2, 3 or 4 injection ports 301 can be provided.

[0050] In some optional embodiments, as shown in Figure 3 The driving motor rotor shaft includes a plurality of communication holes 5, thereby improving the flow of the cooling liquid flowing from the heat dissipation cavity 3 to the hollow cavity 4 and ensuring the heat dissipation effect.

[0051] It can be understood that the through hole 5 can be a rectangular hole after the cross section is developed, and a plurality of rectangular through holes 5 are uniformly distributed on the separation layer 2 in a certain interval along the circumference, and 2, 3 or 4 through holes 5 can be provided. The through hole 5 penetrates the outer wall of the hollow cavity 4 and the inner wall of the heat dissipation cavity 3, and is used for connecting the hollow cavity 4 and the heat dissipation cavity 3.

[0052] In some optional embodiments, the inner diameter of the injection port 301 is smaller than the flow port 401.

[0053] It can be understood that the larger flow port 401 can make the cooling liquid after absorbing heat be able to be discharged faster, and the new cooling liquid with lower temperature be able to enter faster, so as to ensure the heat dissipation effect.

[0054] The driving motor rotor shaft provided by the embodiment of the present application has the following advantages. Since the separation layer 2 is provided with the through hole 5 for connecting the heat dissipation cavity 3 and the hollow cavity 4, the through hole 5 is located at one end of the heat dissipation cavity 3 and the hollow cavity 4, the injection port 301 is located at the other end of the heat dissipation cavity 3, and the flow port 401 is also located at the other end of the hollow cavity 4, in other words, the injection port 301 and the flow port 401 of the cooling liquid are located at the same end of the driving motor rotor shaft, so that on the basis of ensuring the cooling effect, only one end of the driving motor rotor shaft needs to be sealed, and both ends do not need to be sealed, thereby reducing the sealing difficulty and the complexity of the heat dissipation system. In general, the temperature of the driving motor rotor shaft is reduced while the sealing device is reduced, the structure of the heat dissipation system is simplified, and the NVH of the whole vehicle is optimized.

[0055] The present application also provides a vehicle comprising the driving motor rotor shaft in the above aspect, wherein the driving motor rotor shaft comprises a shell 1 and a separation layer 2, and the shell 1 is provided with an injection port 301 and a flow port 401.

[0056] The separation layer 2 is annular in the shell 1 and extends along the axial direction of the driving motor rotor shaft.

[0057] The shell 1 and the separation layer 2 form a heat dissipation cavity 3 therebetween, and the shell 1 is provided with the injection port 301 connected with the heat dissipation cavity 3, and the injection port 301 is used for injecting the cooling liquid.

[0058] The separation layer 2 forms a hollow cavity 4 therein, and the shell 1 is provided with the flow port 401 connected with the hollow cavity 4, and the flow port 401 is used for flowing out the cooling liquid.

[0059] The separation layer 2 is provided with a through hole 5 for connecting the heat dissipation cavity 3 and the hollow cavity 4, and in the axial direction of the driving motor rotor shaft, the through hole 5 is located at one end of the heat dissipation cavity 3 and the hollow cavity 4, the injection port 301 is located at the other end of the heat dissipation cavity 3, and the flow port 401 is located at the other end of the hollow cavity 4.

[0060] It can be understood that the cooling liquid flows through the heat dissipation cavity 3 after being injected from the injection port 301 to dissipate heat for the driving motor rotor shaft, and then flows through the hollow cavity 4 and is finally discharged through the flow port 401.

[0061] In some optional embodiments, the hollow cavity 4 and the heat dissipation cavity 3 both extend along the axial direction of the driving motor rotor shaft and are axisymmetric, so as to ensure that the driving motor rotor shaft is symmetric in shape and uniform in mass, so that the driving motor rotor shaft does not generate additional noise during rotation, and the service life of the driving motor rotor shaft is increased.

[0062] In some optional embodiments, as shown in Figure 2 the driving motor rotor shaft includes a plurality of injection ports 301, so as to increase the flow of the injected cooling liquid and ensure the heat dissipation effect. Figure 2 is a schematic view observed from the outside of the shell 1 of the driving motor rotor shaft.

[0063] It can be understood that the injection port 301 can be a port that is rectangular after being unfolded in section, and a plurality of rectangular injection ports 301 are uniformly distributed on the shell 1 in the circumferential direction at certain intervals, and 2, 3 or 4 injection ports 301 can be provided.

[0064] In some optional embodiments, as shown in Figure 3 the driving motor rotor shaft includes a plurality of communication holes 5, so as to increase the flow of the cooling liquid flowing from the heat dissipation cavity 3 to the hollow cavity 4 and ensure the heat dissipation effect.

[0065] It can be understood that the communication hole 5 can be a hole that is rectangular after being unfolded in section, and a plurality of rectangular communication holes 5 are uniformly distributed on the partition layer 2 in the circumferential direction at certain intervals, and 2, 3 or 4 communication holes 5 can be provided. The communication hole 5 penetrates the outer wall of the hollow cavity 4 and the inner wall of the heat dissipation cavity 3, and is used to communicate the hollow cavity 4 and the heat dissipation cavity 3.

[0066] In some optional embodiments, the inner diameter of the injection port 301 is smaller than the flow port 401.

[0067] It can be understood that a larger flow port 401 can enable the cooling liquid that has absorbed heat to be discharged faster, enable new cooling liquid at a lower temperature to enter faster, and ensure the heat dissipation effect.

[0068] The vehicle provided by the embodiment of the application, since the partition layer 2 of the driving motor rotor shaft of the vehicle is provided with the communication hole 5 for connecting the heat dissipation cavity 3 and the hollow cavity 4, the communication hole 5 is located at one end of the heat dissipation cavity 3 and the hollow cavity 4, the injection port 301 is located at the other end of the heat dissipation cavity 3, and the flow port 401 is also located at the other end of the hollow cavity 4, in other words, the injection port 301 and the flow port 401 of the cooling liquid are both located at the same end of the driving motor rotor shaft, so that on the basis of ensuring the cooling effect, only one end of the driving motor rotor shaft needs to be sealed, and both ends do not need to be sealed, thereby reducing the sealing difficulty and the complexity of the heat dissipation system.

[0069] In the present application, the terms "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance. The term "a plurality of" refers to two or more, unless otherwise explicitly limited.

[0070] Other embodiments of the application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. The specification and examples given are intended as illustrative only and not limiting of the present application. The application is to be limited only by the claims.

[0071] It should be understood that the application is not limited to the precise construction that has been described above and shown in the accompanying drawings, and that various modifications and changes can be made by those skilled in the art without departing from the scope of the application. The scope of the application is limited only by the appended claims.

Claims

1. A drive motor rotor shaft, characterized by, The driving motor rotor shaft comprises an outer shell (1) and a separation layer (2), wherein, The separation layer (2) is annular inside the outer shell (1) and extends along the axial direction of the driving motor rotor shaft; A heat dissipation cavity (3) is formed between the outer shell (1) and the separation layer (2), the outer shell (1) is provided with an injection port (301) communicating with the heat dissipation cavity (3), and the injection port (301) is used for injecting cooling liquid; A hollow cavity (4) is formed in the separation layer (2), and the outer shell (1) is provided with an outlet port (401) communicating with the hollow cavity (4), and the outlet port (401) is used for flowing out cooling liquid; The separation layer (2) is provided with a communication hole (5) for communicating the heat dissipation cavity (3) and the hollow cavity (4), wherein in the axial direction of the driving motor rotor shaft, the communication hole (5) is located at one end of the heat dissipation cavity (3) and the hollow cavity (4), the injection port (301) is located at the other end of the heat dissipation cavity (3), and the outlet port (401) is located at the other end of the hollow cavity (4).

2. The drive motor rotor shaft of claim 1, wherein, The hollow cavity (4) and the heat dissipation cavity (3) both extend along the axial direction of the driving motor rotor shaft and are axisymmetric.

3. The drive motor rotor shaft of claim 1, wherein, The driving motor rotor shaft comprises a plurality of injection ports (301).

4. The drive motor rotor shaft of claim 1, wherein, The driving motor rotor shaft comprises a plurality of communication holes (5).

5. The drive motor rotor shaft of claim 1, wherein, The inner diameter of the injection port (301) is smaller than that of the outlet port (401).

6. A vehicle comprising a drive motor rotor shaft, characterized by The driving motor rotor shaft comprises an outer shell (1) and a separation layer (2), wherein, The separation layer (2) is annular inside the outer shell (1) and extends along the axial direction of the driving motor rotor shaft; A heat dissipation cavity (3) is formed between the outer shell (1) and the separation layer (2), the outer shell (1) is provided with an injection port (301) communicating with the heat dissipation cavity (3), and the injection port (301) is used for injecting cooling liquid; A hollow cavity (4) is formed in the separation layer (2), and the outer shell (1) is provided with an outlet port (401) communicating with the hollow cavity (4), and the outlet port (401) is used for flowing out cooling liquid; The separation layer (2) is provided with a communication hole (5) for communicating the heat dissipation cavity (3) and the hollow cavity (4), wherein in the axial direction of the driving motor rotor shaft, the communication hole (5) is located at one end of the heat dissipation cavity (3) and the hollow cavity (4), the injection port (301) is located at the other end of the heat dissipation cavity (3), and the outlet port (401) is located at the other end of the hollow cavity (4).

7. The vehicle of claim 6, wherein The hollow cavity (4) and the heat dissipation cavity (3) both extend along the axial direction of the driving motor rotor shaft and are axisymmetric.

8. The vehicle of claim 6, wherein, The driving motor rotor shaft comprises a plurality of injection ports (301).

9. The vehicle of claim 6, wherein, The driving motor rotor shaft comprises a plurality of communication holes (5).

10. The vehicle of claim 6, wherein, The inner diameter of the injection port (301) is smaller than that of the outlet port (401).

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