Gasket, motor and vehicle

Abstract

The application provides a sealing gasket, a motor comprising the sealing gasket, and a vehicle comprising the motor. The sealing gasket comprises a gasket body and gasket flow holes for connecting flow channels of a cooling medium on a motor rotor iron core and a dynamic balance plate in an axial direction, wherein a plurality of the gasket flow holes are uniformly arranged along a circumferential direction of the gasket body. According to the technical scheme of the application, the flow and cooling of the cooling medium from the rotor to the stator are realized in the existing structural space of the motor, the close combination with the structure of the motor itself is realized, and thus the size of the motor cooling system is optimized.

Description

Technical Field

[0001] This application relates to the field of motor cooling, specifically to a sealing gasket for motor cooling and a motor including the gasket, and further to a vehicle including the motor. Background Technology

[0002] New energy vehicles are one of the development trends in the automotive industry. Due to considerations of battery technology and cost, hybrid vehicles have received widespread attention in recent years. Traditional new energy vehicle motors mostly use water cooling. Water-cooled motors require an external housing with integrated cooling oil channels to enclose the motor, increasing the size and cost of the motor. At the same time, it cannot cool the motor rotor, forcing the use of high-cost magnets to prevent demagnetization caused by high temperatures. In contrast, oil-cooled motor structures can better cool the temperature of the permanent magnets in the motor rotor, allowing the motor design to use magnets with lower temperature resistance, thereby reducing the cost of the motor.

[0003] Considering the size and cost of the integrated power transmission system in hybrid vehicles, it is crucial to design a motor cooling structure with better cooling performance. Summary of the Invention

[0004] One aspect of this application is to provide a sealing gasket for an electric motor.

[0005] Another objective of this application is to provide an electric motor including the aforementioned sealing gasket.

[0006] Another aspect of this application is to provide a vehicle including the aforementioned electric motor.

[0007] To achieve one of the aforementioned objectives, according to one aspect of this application, a sealing gasket is provided, wherein the sealing gasket comprises: a gasket body, wherein a motor shaft mounting hole is provided in the middle of the gasket body through which the gasket body extends axially; and a gasket guide hole that extends axially through the gasket body to connect a flow channel for cooling medium on a motor rotor core and a dynamic balance plate; wherein a plurality of gasket guide holes are uniformly arranged circumferentially along the gasket body.

[0008] In addition to one or more of the features described above, or as an alternative, in another embodiment, the sealing gasket further includes gasket magnet grooves uniformly disposed circumferentially along the gasket body for magnet insertion.

[0009] In addition to one or more of the features described above, or as an alternative, in another embodiment, the gasket body further includes a gasket guide channel evenly distributed along the inner periphery of the motor shaft mounting hole to connect the flow path of the cooling medium on the motor shaft and the dynamic balance plate.

[0010] To achieve one of the aforementioned objectives, according to another aspect of this application, an electric motor is provided, the electric motor comprising: a rotor having a shaft and a rotor core; a stator; a first dynamic balancing plate and a second dynamic balancing plate, the first dynamic balancing plate and the second dynamic balancing plate being respectively used to introduce a cooling medium from the rotor or to discharge a cooling medium to the stator; and a sealing gasket configured as a sealing gasket as described in any of the foregoing aspects; wherein the first dynamic balancing plate and the second dynamic balancing plate are respectively arranged on both sides of the electric motor, and the sealing gasket is respectively disposed between the rotor core and the first dynamic balancing plate and between the rotor core and the second dynamic balancing plate; and wherein the rotor is in communication with the first dynamic balancing plate and / or the second dynamic balancing plate via a first flow path, the first dynamic balancing plate is in communication with the second dynamic balancing plate via a second flow path, and the stator is in communication with the first dynamic balancing plate and / or the second dynamic balancing plate via a third flow path.

[0011] In addition to one or more of the features described above, or as an alternative, in another embodiment, the first dynamic balancing plate and the second dynamic balancing plate are configured as identical dynamic balancing plates, each dynamic balancing plate comprising: a dynamic balancing plate body having a shaft hole through which the rotating shaft passes; an inlet groove disposed on the dynamic balancing plate body and communicating with the shaft hole, for introducing cooling medium from the rotor; and an outlet groove disposed on the dynamic balancing plate body for discharging cooling medium to the stator; wherein a plurality of the inlet grooves and a plurality of the outlet grooves are uniformly staggered along the circumference of the dynamic balancing plate body.

[0012] In addition to one or more of the features described above, or as an alternative, in another embodiment, the inlet groove is provided with a protrusion, and the inner sidewall of the inlet groove and the protrusion form a flow channel for the cooling medium.

[0013] In addition to one or more of the features described above, or as an alternative, in another embodiment, the width of the flow channel is constant.

[0014] In addition to one or more of the features described above, or as an alternative, in another embodiment, the top surface of the protrusion is flush with the surface of the dynamic balance plate body.

[0015] In addition to one or more of the features described above, or as an alternative, in another embodiment, the dynamic balancing plate body includes a first surface on which the inlet groove and the outlet groove are arranged.

[0016] In addition to one or more of the features described above, or as an alternative, in another embodiment, the dynamic balancing plate body further includes a second surface opposite to the first surface, and the outlet groove penetrates from the first surface through the dynamic balancing plate body to the second surface.

[0017] In addition to one or more of the features described above, or as an alternative, in another embodiment, the outlet groove includes: a through hole penetrating the dynamic balancing plate body; a first ramp disposed on a first side of the through hole near the center of the dynamic balancing plate body and having a first guide ramp inclined radially toward the through hole; and a second ramp disposed on a second side of the through hole away from the center of the dynamic balancing plate body and having a second guide ramp inclined radially away from the through hole.

[0018] In addition to one or more of the features described above, or as an alternative, in another embodiment, the first guide ramp is configured as a ramp with a gradually decreasing width toward the through hole; and / or the second guide ramp is configured as a ramp with a constant or gradually increasing width away from the through hole.

[0019] In addition to one or more of the features described above, or as an alternative, in another embodiment, the dynamic balancing plate further includes an annular groove disposed along the shaft hole of the dynamic balancing plate body and connecting the motor rotor with the guide groove.

[0020] In addition to one or more of the features described above, or as an alternative, in another embodiment, when the sealing gasket includes a gasket guide channel, the first flow path includes a first axial hole disposed along the longitudinal axis of the rotating shaft, a first radial hole disposed along the radial direction of the rotating shaft, a guide channel disposed along the axial direction of the rotor core, and the gasket guide channel; wherein, the cooling medium flows sequentially through the first axial hole, the first radial hole, the guide channel, and the gasket guide channel to the inlet groove of the first dynamic balancing plate and / or the second dynamic balancing plate.

[0021] In addition to one or more of the features described above, or as an alternative, in another embodiment, when the sealing gasket includes a gasket guide channel, the second flow path includes the gasket guide hole and a guide hole axially disposed within the rotor core, the guide hole communicating with the gasket guide hole; wherein, the inlet groove of the first dynamic balancing plate and the outlet groove of the second dynamic balancing plate are connected through the guide hole and the gasket guide hole; and / or the outlet groove of the first dynamic balancing plate and the inlet groove of the second dynamic balancing plate are connected through the guide hole and the gasket guide hole.

[0022] In addition to one or more of the features described above, or as an alternative, in another embodiment, the rotor core includes: a magnet slot for inserting a magnet; a guide channel axially disposed on the inner wall surface of the rotor core and communicating with the shaft; wherein a plurality of the guide channels are uniformly arranged circumferentially along the rotor core, and the guide channels are staggered from the flow guide holes.

[0023] In addition to one or more of the features described above, or as an alternative, in another embodiment, the gasket magnet groove, gasket guide hole, and gasket guide channel of the sealing gasket correspond in position, shape, and size to the magnet groove, guide hole, and guide channel of the rotor core, respectively.

[0024] In addition to one or more of the features described above, or as an alternative, in another embodiment, the rotor core further includes weight-reduction holes, wherein the flow guide holes are located closer to the magnet slots than the weight-reduction holes.

[0025] To achieve one of the aforementioned objectives, this application also provides a vehicle that includes an electric motor as described in the foregoing aspects.

[0026] According to the sealing gasket of this application, the motor including the sealing gasket, and the vehicle including the motor, by configuring gasket guide holes on the sealing gasket body for connecting the flow channel of the cooling medium on the motor rotor and the dynamic balance plate, the flow and cooling of the cooling medium from the rotor to the stator are realized within the existing structural space of the motor, achieving a tight integration with the motor's own structure, thereby optimizing the size of the motor cooling system. Attached Figure Description

[0027] The disclosure of this application will become more apparent with reference to the accompanying drawings. It should be understood that these drawings are for illustrative purposes only and are not intended to limit the scope of protection of this application. In the drawings:

[0028] Figure 1 This is a front view of a sealing gasket according to one embodiment of this application;

[0029] Figure 2 This is a cross-sectional view of the cooling structure of an electric motor according to one embodiment of this application;

[0030] Figure 3 This is a cross-sectional view of the cooling structure of an electric motor according to one embodiment of this application from another angle;

[0031] Figure 4 This is a perspective view of a dynamic balance plate for an electric motor according to one embodiment of this application;

[0032] Figure 5 It shows Figure 4 A three-dimensional view of the dynamic balancing plate from another angle;

[0033] Figure 6 This is a front view of the dynamic balance plate of the motor according to another embodiment of this application;

[0034] Figure 7 This is a perspective view of the dynamic balance plate of the motor according to another embodiment of this application;

[0035] Figure 8 It shows Figure 7 A three-dimensional view of the dynamic balancing plate from another angle is shown; and

[0036] Figure 9 This is a front view of the rotor core of an electric motor according to one embodiment of this application. Detailed Implementation

[0037] The present application will now be described in detail with reference to exemplary embodiments shown in the accompanying drawings. However, it should be understood that the present application may be implemented in many different forms and should not be construed as limited to the embodiments set forth herein. These embodiments are provided herein to make the disclosure of the present application more complete and exhaustive, and to fully convey the concept of the present application to those skilled in the art.

[0038] Furthermore, for any single technical feature described or implied in the embodiments mentioned herein, or any single technical feature shown or implied in the various figures, this application still allows for any combination or deletion of these technical features (or their equivalents) without any technical obstacle, thereby obtaining more other embodiments of this application that may not be directly mentioned herein.

[0039] Figure 1 This is a front view of a sealing gasket 100 according to one embodiment of the present application. The sealing gasket 100 of the present application is used to be disposed between the rotor core of an electric motor and a dynamic balance plate to form a loop of the cooling flow path in the motor cooling system.

[0040] As shown in the figure, the sealing gasket 100 may include a gasket body 110, with a motor shaft mounting hole extending axially through the center of the gasket body 110. The sealing gasket 100 also includes a gasket guide hole 111 extending axially through the gasket body 110. This guide hole 111 connects the flow channels of the cooling medium on the motor rotor core and the dynamic balancing plate, thereby sealing the flow channels of the cooling medium and guiding the cooling medium. In this embodiment, to ensure that the sealing gasket does not obstruct the dynamic balance of the motor rotor, the various features provided on the sealing gasket body should be symmetrical. For example, multiple gasket guide holes 111 can be evenly arranged circumferentially along the gasket body 110. By arranging the sealing gasket between the motor rotor core and the dynamic balancing plate, the cooling medium can flow unimpeded from the dynamic balancing plate to the rotor core or from the rotor core to the dynamic balancing plate.

[0041] In this arrangement, the sealing gasket described in this paper achieves sealing and guidance of the cooling medium between the motor rotor core and the dynamic balance plate, and achieves a tight integration with the motor's own structure, thereby optimizing the size of the motor cooling system.

[0042] The following will illustrate further modifications to the gasket by way of example, in order to further improve its efficiency, reliability or for other improvements.

[0043] For example, as shown in the figure, the sealing gasket 100 may further include gasket magnet slots 112 uniformly arranged circumferentially along the gasket body 110, which correspond to the magnet slots on the motor rotor core for magnet insertion. Cooling medium flowing near the gasket magnet slots and the magnet slots on the rotor core (e.g., in the gasket guide holes and the rotor core guide holes) can cool the inserted magnets.

[0044] For example, in the illustrated embodiment, the gasket body 110 further includes a gasket guide channel 113 evenly distributed along the inner periphery of the motor shaft mounting hole for connecting the flow path of the cooling medium on the motor shaft and the dynamic balance plate. When the sealing gasket 100 is arranged in the motor, the cooling medium flows from the motor shaft through the gasket guide channel 113 to the flow path of the cooling medium on the dynamic balance plate, thereby cooling the rotor portion through which the cooling medium flows.

[0045] Figure 2 This is a cross-sectional view of a cooling structure for an electric motor according to one embodiment of this application. Figure 3This is a cross-sectional view from another angle of the cooling structure of an electric motor according to one embodiment of this application. The motor includes a rotor 200 having a shaft 210 and a rotor core 220, and a stator (not shown). The motor also includes a first dynamic balancing plate 300a and a second dynamic balancing plate 300b, the first dynamic balancing plate 300a being used to introduce cooling medium from the rotor 200 or to discharge cooling medium to the stator, and the second dynamic balancing plate 300b being used to discharge cooling medium to the stator or to introduce cooling medium from the rotor 200. Furthermore, the motor includes a sealing gasket 100, which is configured as a sealing gasket according to any of the foregoing embodiments or combinations thereof. The first dynamic balancing plate 300a and the second dynamic balancing plate 300b are respectively arranged on both sides of the motor, and each sealing gasket 100 is respectively disposed between the rotor core 220 and the first dynamic balancing plate 300a, and between the rotor core 220 and the second dynamic balancing plate 300b.

[0046] Figure 4 This is a perspective view of a dynamic balancing plate 300 for an electric motor according to one embodiment of this application. Figure 5 It shows Figure 4 The figure shows a perspective view of the dynamic balancing plate 300 from another angle. Both the first dynamic balancing plate 300a and the second dynamic balancing plate 300b are configured as identical dynamic balancing plates 300. As can be seen from the figure, the dynamic balancing plate 300 may include a dynamic balancing plate body 310 with a shaft hole through which the rotating shaft 210 passes, an inlet groove 311, and an outlet groove 312 disposed on the dynamic balancing plate body 310. The inlet groove 311 is used to introduce cooling medium from the rotor 200, and the outlet groove 312 is used to outlet cooling medium to the stator, thereby achieving temporary storage and guidance of the cooling medium. In this embodiment, to ensure that the dynamic balancing plate achieves its basic function of self-balancing, the various features provided on the dynamic balancing plate body should be symmetrical. For example, multiple inlet grooves 311 and multiple outlet grooves 312 can be evenly staggered along the circumference of the dynamic balancing plate body 310, that is, one outlet groove 312 is arranged between every two inlet grooves 311. Subsequently, by staggering the two dynamic balancing plates on both sides of the motor, the cooling medium can flow from the inlet groove of one dynamic balancing plate to the corresponding outlet groove of the other dynamic balancing plate through two different flow channels, thereby realizing the flow and cooling of the cooling medium from the rotor to the stator within the existing structural space of the motor.

[0047] The following will illustrate further modifications to the dynamic balancing plate through exemplary description, in order to further improve its working efficiency, reliability, or for other improvements.

[0048] For example, as shown in the figure, a protrusion 3111 can also be provided inside the inlet groove 311. In this case, the inner sidewall of the inlet groove 311 and the protrusion 3111 form a flow channel for the cooling medium, thereby restricting the flow direction of the cooling medium and allowing it to flow along the inner sidewall of the inlet groove 311 to effectively cool the internal structure of the motor, such as the rotor permanent magnet, near the inlet groove 311. When the dynamic balancing plate is applied in the motor, the flow channel is connected to the guide hole in the motor rotor core. At this time, the protrusion 3111 restricts the cooling medium to flow along the side closer to the rotor permanent magnet when it flows through the guide hole via the flow channel, so as to cool the rotor permanent magnet more effectively. Preferably, the width of the flow channel is constant, so that the flow rate of the cooling medium is stable and can pass smoothly through the flow channel.

[0049] Based on this, the top surface of the protrusion 3111 can be configured to be flush with the surface of the dynamic balancing plate body 310. In this case, when the dynamic balancing plate is assembled onto the motor rotor, the surface of the dynamic balancing plate body 310 and the top surface of the protrusion 3111 respectively contact the sealing gasket and form a seal, thereby creating a semi-closed space within the enclosed guide groove. This reduces the amount of cooling medium overflowing from the flow channel, allowing for full utilization of the cooling medium and improving the directional cooling effect.

[0050] For example, in the illustrated embodiment, both the inlet groove 311 and the outlet groove 312 are arranged on the same surface of the dynamic balancing plate body 310, such as... Figure 4 On the first surface 313 shown, when the two dynamic balancing plates are respectively installed on both sides of the motor, their first surfaces 313 are sealed to the motor rotor, thereby providing two cooling channels. In other embodiments, the inlet groove 311 and the outlet groove 312 can also be respectively provided on different surfaces of the dynamic balancing plate body 310, such as providing the inlet groove 311 on the first surface 313 and the outlet groove 312 on... Figure 5 On the second surface 314 shown. At this time, when the two dynamic balancing plates are respectively installed on both sides of the motor, one dynamic balancing plate is sealed to the motor rotor with its first surface facing it, and the other dynamic balancing plate is sealed to the motor rotor with its second surface facing it, thereby providing a single cooling channel.

[0051] For example, in the illustrated embodiment, the outlet groove 312 penetrates from the first surface 313 through the dynamic balance plate body 310 to the second surface 314, and the cooling medium flows from the rotor to the motor stator through the outlet groove 312, thereby cooling the motor stator.

[0052] More specifically, the outlet groove 312 may include a through hole 3121 penetrating the dynamic balancing plate body 310, a first inclined platform 3122, and a second inclined platform 3123. The first inclined platform 3122 is located on a first side of the through hole 3121 near the center of the dynamic balancing plate body 310, and has a first guide inclined surface 3122' inclined radially toward the through hole 3121 to facilitate the inflow of cooling medium; the second inclined platform 3123 is located on a second side of the through hole 3121 away from the center of the dynamic balancing plate body 310, and has a second guide inclined surface 3123' inclined radially away from the through hole 3121 to facilitate the outflow of cooling medium. The cooling medium is guided along the first guide inclined surface 3122' to the through hole 3121, flows through the through hole 3121 to the second guide inclined surface 3123', and is then thrown onto the motor stator for cooling under centrifugal force.

[0053] As shown in the figure, the first guide slope 3122' is configured as a slope with a gradually decreasing width towards the through hole 3121. This width design guides and accelerates the cooling medium on the first guide slope 3122', facilitating the flow of the cooling medium out of the through hole 3121. The second guide slope 3123' is configured as a slope with a gradually increasing width away from the through hole 3121 to reduce the impact of the cooling medium flowing out against the inner wall of the outlet groove, thereby reducing the resistance when the cooling medium flows out. In an optional embodiment, the second guide slope 3123' can also have a constant width, thereby reducing the complexity of processing.

[0054] Figure 6 This is a front view of a dynamic balancing plate for a motor according to another embodiment of this application. In addition to the aforementioned features, the dynamic balancing plate of this application may also have an annular groove 315, which is disposed along the shaft hole of the dynamic balancing plate body 310 and communicates with a guide groove 311. The guide groove 311 communicates with the motor rotor through the annular groove 315. The annular groove 315 allows the cooling medium to flow from the motor rotor into the guide groove 311 from any position on the inner edge of the dynamic balancing plate, without necessarily being directly opposite the guide groove 311.

[0055] Figure 7 This is a perspective view of the dynamic balancing plate of a motor according to another embodiment of this application, and Figure 8 It shows Figure 7 The figure shows a perspective view of the dynamic balancing plate from another angle. As shown, the inlet groove 311 can have an asymmetrical structure about a single centerline, but multiple inlet grooves 311 can form a centrally symmetrical structure, thereby using the rotation of the motor rotor to limit the flow direction of the cooling medium in the inlet groove 311. As shown, a weight-reducing groove 316 can also be provided on the dynamic balancing plate to reduce the weight of the dynamic balancing plate.

[0056] like Figure 8As shown, the second guide slope 3123' of the guide groove 312 does not extend to the edge of the second surface 314 of the dynamic balance plate. This design can still achieve the effect of saving the thickness of the dynamic balance plate and does not affect the arrangement of the weight reduction groove 316.

[0057] Back Figure 2 and Figure 3 .exist Figure 2 In the rotor core 220, a first axial hole 211 is provided along the longitudinal axis of the rotating shaft 210, a first radial hole 212 is provided along the radial direction of the rotating shaft 210, and a guide channel 221 is provided along the axial direction of the rotor core 220. The first axial hole 211 communicates with the first radial hole 212, the first radial hole 212 communicates with the guide channel 221, and the guide channel 221 communicates with the gasket guide channel 113. When cooling the motor, such as... Figure 2 The dashed line in the diagram shows one flow direction of the first flow path during motor cooling. The cooling medium flows sequentially through the first axial hole 211, the first radial hole 212, the guide channel 221, and the gasket guide channel 113 to the annular groove 315 of the first dynamic balancing plate 300a, and then can flow from the annular groove 315 to the inlet groove of the first dynamic balancing plate 300a. Although Figure 2 Although not shown in the diagram, the cooling medium may also flow in another direction sequentially through the first axial hole 211, the first radial hole 212, the guide channel 221, and the gasket guide channel 113 to the inlet groove of the second dynamic balancing plate 300b. It should be noted that in other embodiments using the dynamic balancing plate, the first flow path may not include the annular groove 315.

[0058] exist Figure 3 In the cross-sectional view shown, a guide hole 222 is axially arranged inside the rotor core 220, and this guide hole 222 communicates with the shim guide hole 111. Specifically, the inlet groove 311 of the first dynamic balancing plate 300a and the outlet groove 312 of the second dynamic balancing plate 300b are connected through the guide hole 222 and the shim guide hole 111; and / or the outlet groove 312 of the first dynamic balancing plate 300a and the inlet groove 311 of the second dynamic balancing plate 300b are connected through the guide hole 222 and the shim guide hole 111. Figure 3 The dashed lines in the diagram illustrate one flow direction of the second and third flow paths during motor cooling. In the second flow path, the cooling medium, after flowing to the inlet groove 315 of the first dynamic balancing plate 300a, flows through the gasket guide hole 111 of the sealing gasket 100 on one side in contact with it, the guide hole 222 of the rotor core, and the gasket guide hole 111 of the sealing gasket 100 on the other side to the outlet groove 312 of the second dynamic balancing plate 300b; subsequently, in the third flow path, the cooling medium flows out from the outlet groove of the second dynamic balancing plate 300b, thereby cooling the stator. Although Figure 3Although not shown in the diagram, the cooling medium can also flow in another direction along the second and third flow paths, from the inlet groove of the second dynamic balancing plate 300b through the guide hole 222 and the gasket guide hole 111 to the outlet groove of the first dynamic balancing plate 300a, and then flow out from the outlet groove of the first dynamic balancing plate 300a. It should be understood that although in the illustrated embodiment, the third flow path includes the outlet groove of the first or second dynamic balancing plate, when there are other components between the dynamic balancing plate and the stator, the third flow path also includes flow channels provided on these components.

[0059] Figure 9 This is a front view of the rotor core of an electric motor according to one embodiment of this application. The rotor core 220 includes magnet slots 223 for inserting magnets, guide channels 221, and guide holes 222. Multiple guide channels 221 are evenly arranged along the circumference of the rotor core 220. The guide channels 221 are staggered from the guide holes 222, meaning they are positioned between two guide holes 222 without directly aligning with one of them. This effectively improves rotor strength and provides more space for the guide holes, thus reducing weight.

[0060] The gasket magnet groove 112, gasket guide hole 111, and gasket guide channel 113 of the sealing gasket 100 can correspond to the position, shape, and size of the magnet groove 223, guide hole 222, and guide channel 221 of the rotor core 220, respectively, so that the sealing gasket can be manufactured using the same mold as the rotor core, thereby reducing the motor manufacturing cost.

[0061] like Figure 9 As shown, the rotor core 220 may also include a weight reduction hole 224, wherein the guide hole 222 is set closer to the magnet slot 223 than the weight reduction hole 224. Since the sealing gasket does not have a structure corresponding to the weight reduction hole 224, the poor cooling effect caused by the cooling medium flowing into the weight reduction hole 224 which is far away from the magnet slot 223 is avoided. The cooling medium flowing through the guide hole 222 which is close to the magnet slot 223 can effectively cool the magnets in the magnet slot, thereby improving the cooling efficiency of the motor.

[0062] In this arrangement, the motor according to this application allows the cooling medium to flow through the shaft, rotor core, and sealing gaskets to the inlet groove of the dynamic balancing plate, then into the gasket guide holes, the guide holes inside the rotor core, and the gasket guide holes on the other side, before flowing out from the outlet groove of the dynamic balancing plate on the other side. This cooling process effectively reduces the temperature of the motor rotor and magnets. Finally, the cooling medium is thrown out from the outlet groove of the dynamic balancing plate onto the motor stator, further reducing the temperature of the motor stator. This cooling structure effectively reduces the motor rotor temperature, allowing the use of permanent magnets with lower temperature resistance, thus significantly reducing motor costs. The cooling medium thrown out from the stator effectively reduces the motor stator temperature, thereby reducing motor copper losses and significantly improving motor efficiency. Furthermore, this application fully utilizes components such as the motor shaft, rotor core, dynamic balancing plate, and sealing gaskets to develop a cooling flow path, avoiding additional cooling structures and significantly reducing motor size and cost.

[0063] The examples above primarily illustrate the sealing gaskets, motors, and vehicles of this application. Although only some embodiments of this application have been described, those skilled in the art will understand that this application can be implemented in many other forms without departing from its spirit and scope. Therefore, the examples and embodiments shown are intended to be illustrative rather than restrictive, and various modifications and substitutions may be made without departing from the spirit and scope of this application as defined by the appended claims.

Claims

1. An electric motor, characterized in that, The motor includes: The rotor (200) has a rotating shaft (210) and a rotor core (220). stator; A first dynamic balancing plate (300a) and a second dynamic balancing plate (300b) are respectively used to introduce cooling medium from the rotor (200) or to discharge cooling medium to the stator. Sealing gasket (100), including; The gasket body (110) has a motor shaft mounting hole that extends axially through the gasket body (110) in its middle part; The gasket guide hole (111) extends axially through the gasket body (110) to connect the flow channels of the cooling medium on the motor rotor core and the dynamic balance plate; The plurality of gasket guide holes (111) are evenly arranged along the circumference of the gasket body (110); The first dynamic balancing plate (300a) and the second dynamic balancing plate (300b) are respectively arranged on both sides of the motor, and the sealing gaskets (100) are respectively disposed between the rotor core (220) and the first dynamic balancing plate (300a) and / or between the rotor core (220) and the second dynamic balancing plate (300b); and The rotor (200) is connected to the first dynamic balance plate (300a) and / or the second dynamic balance plate (300b) via a first flow path, the first dynamic balance plate (300a) is connected to the second dynamic balance plate (300b) via a second flow path, and the stator is connected to the first dynamic balance plate (300a) and / or the second dynamic balance plate (300b) via a third flow path. The first dynamic balancing plate (300a) and the second dynamic balancing plate (300b) are configured as the same dynamic balancing plate (300), the dynamic balancing plate (300) comprising: The dynamic balancing plate body (310) is provided with a shaft hole through which the rotating shaft (210) passes; An inlet groove (311) is provided on the dynamic balance plate body (310) and communicates with the shaft hole, and is used to introduce cooling medium from the rotor (200); The inlet groove (311) is provided with a protrusion (3111) inside, and the inner sidewall of the inlet groove (311) and the protrusion (3111) form a flow channel for the cooling medium. The width of the flow channel is constant.

2. The motor according to claim 1, characterized in that, The dynamic balancing plate (300) includes: A discharge slot (312) is provided on the dynamic balance plate body (310) and is used to discharge cooling medium to the stator; The plurality of the inlet grooves (311) and the plurality of the outlet grooves (312) are arranged in a staggered manner along the circumference of the dynamic balance plate body (310).

3. The motor according to claim 1, characterized in that, The top surface of the protrusion (3111) is flush with the surface of the dynamic balance plate body (310).

4. The motor according to claim 2, characterized in that, The dynamic balancing plate body (310) includes a first surface (313), and the inlet groove (311) and the outlet groove (312) are arranged on the first surface (313).

5. The motor according to claim 4, characterized in that, The dynamic balance plate body (310) also includes a second surface (314) opposite to the first surface (313), and the outlet groove (312) penetrates from the first surface (313) through the dynamic balance plate body (310) to the second surface (314).

6. The motor according to claim 5, characterized in that, The outlet slot (312) includes: A through hole (3121) penetrates the main body (310) of the dynamic balance plate. A first ramp (3122) is disposed on a first side of the through hole (3121) near the center of the dynamic balance plate body (310), and has a first guide ramp (3122') inclined radially toward the through hole (3121); and The second ramp (3123) is located on the second side of the through hole (3121) away from the center of the dynamic balance plate body (310), and has a second guide ramp (3123') that is radially inclined away from the through hole (3121).

7. The motor according to claim 6, characterized in that, The first guide ramp (3122') is configured as a ramp with a gradually decreasing width toward the through hole (3121); and / or the second guide ramp (3123') is configured as a ramp with a constant or gradually increasing width away from the through hole (3121).

8. The motor according to any one of claims 1-7, characterized in that, The dynamic balancing plate (300) also includes an annular groove (315), which is provided along the shaft hole of the dynamic balancing plate body (310) and connects the motor rotor with the inlet groove (311).

9. The motor according to claim 1, characterized in that, The sealing gasket (100) includes a gasket guide channel (113), and the first flow path includes a first axial hole (211) arranged along the longitudinal axis of the rotating shaft (210), a first radial hole (212) arranged along the radial direction of the rotating shaft (210), a guide channel (221) arranged along the axial direction of the rotor core (220), and the gasket guide channel (113). The cooling medium flows sequentially through the first axial hole (211), the first radial hole (212), the guide channel (221), and the gasket guide channel (113) to the inlet groove (311) of the first dynamic balance plate (300a) and / or the second dynamic balance plate (300b).

10. The motor according to claim 2, characterized in that, The sealing gasket (100) includes a gasket guide channel (113), and the second flow path includes the gasket guide hole (111) and a guide hole (222) arranged axially in the rotor core (220), wherein the guide hole (222) communicates with the gasket guide hole (111); Wherein, the inlet groove (311) of the first dynamic balancing plate (300a) and the outlet groove (312) of the second dynamic balancing plate (300b) are connected through the guide hole (222) and the gasket guide hole (111); and / or the outlet groove (312) of the first dynamic balancing plate (300a) and the inlet groove (311) of the second dynamic balancing plate (300b) are connected through the guide hole (222) and the gasket guide hole (111).

11. The motor according to claim 10, characterized in that, The rotor core (220) includes: Magnet slot (223), which is used to insert magnets; A guide channel (221) is axially disposed on the inner wall surface of the rotor core (220) and communicates with the rotating shaft (210); The multiple guide channels (221) are evenly arranged along the circumference of the rotor core (220), and the guide channels (221) are staggered from the flow guide holes (222).

12. The motor according to claim 11, characterized in that, The gasket magnet groove (112), gasket guide hole (111), and gasket guide channel (113) of the sealing gasket (100) correspond to the position, shape, and size of the magnet groove (223), guide hole (222), and guide channel (221) of the rotor core (220), respectively.

13. The motor according to claim 12, characterized in that, The rotor core (220) also includes a weight reduction hole (224), wherein the flow guide hole (222) is located closer to the magnet slot (223) than the weight reduction hole (224).

14. The motor according to claim 1, characterized in that, The sealing gasket (100) also includes a gasket magnet groove (112) uniformly arranged circumferentially along the gasket body (110) for magnet insertion.

15. The motor according to claim 1, characterized in that, The gasket body (110) also includes a gasket guide channel (113) evenly arranged along the inner periphery of the motor shaft mounting hole to connect the flow channel of the cooling medium on the motor shaft and the dynamic balance plate.

16. A vehicle comprising an electric motor according to any one of claims 1-15.

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