Motor and bridge system

Abstract

The application provides a motor and a bridge system. The motor comprises an oil guide element (1) and an oil collecting groove (31), the oil collecting groove (31) is formed on a balance plate (3) of a rotor (6) of the motor and has an opening for receiving cooling oil, the oil guide element (1) is installed on a motor shell (7) and comprises an oil storage groove (11) and an oil outlet (13), the oil storage groove (11) is formed with a cavity for containing cooling oil, the oil outlet (13) is communicated with the oil storage groove (11), in a vertical direction (V), the oil outlet (13) is located above the opening of the oil collecting groove (31), when a cooling oil liquid level in the oil storage groove (11) reaches the oil outlet (13), the cooling oil can overflow and flow into the opening of the oil collecting groove (31) through the oil outlet (13).

Description

Technical Field

[0001] This application belongs to the field of vehicle powertrain technology, and specifically relates to an electric motor and an electric axle system. Background Technology

[0002] CN119051310A discloses an electric motor and vehicle power system, which uses an oil pump to pressurize cooling oil and supplies cooling oil to the oil collection tank of the balance plate through a channel on the housing, thereby cooling the rotor. Utility Model Content

[0003] This application aims to provide an electric motor in which the oil outlet of the oil guide element is higher than the opening of the oil collection tank, so as to efficiently supply oil to the oil collection tank.

[0004] This application provides an embodiment of an electric motor, including an oil guiding element and an oil collecting tank.

[0005] The oil collection trough is formed on the balance plate of the motor rotor and has an opening to receive cooling oil.

[0006] The oil guiding element is installed on the motor housing and includes an oil reservoir and an oil outlet. The oil reservoir forms a cavity for containing cooling oil. The oil outlet communicates with the oil reservoir. In the vertical direction, the oil outlet is located above the opening of the oil collection tank. When the level of the cooling oil in the oil reservoir reaches the oil outlet, the cooling oil can overflow through the oil outlet and flow into the opening of the oil collection tank.

[0007] In at least one possible implementation, the oil collection trough is annular, the opening of the oil collection trough faces radially inward, the oil outlet is located radially inward of the oil collection trough, and the height of the oil outlet is higher than the height of the oil collection trough at the corresponding position.

[0008] In at least one possible implementation, the oil collection groove is disposed on a balance plate at at least one axial end of the rotor.

[0009] In at least one possible implementation, the oil outlet is defined by a downwardly recessed arcuate plate that extends along the axial and circumferential directions of the motor.

[0010] In at least one possible implementation, the oil guiding element further includes an oil inlet, and in the vertical direction, the oil outlet is located above the oil inlet, and the oil inlet and the oil outlet are respectively disposed on both sides of the axial direction of the oil storage tank.

[0011] In at least one possible implementation, the interior of the oil storage tank is provided with a baffle plate, which is a plate extending along the axial direction of the motor and in the vertical direction or radial direction of the motor.

[0012] In at least one possible implementation, the oil reservoir includes a peripheral wall and two end walls disposed at both axial ends of the peripheral wall. The peripheral wall includes an arc segment and a groove segment. The arc segment extends along an arc, and the groove segment is disposed in the region between the two arc segments. The groove segment is recessed from the arc segment toward the radially outer side of the motor.

[0013] In at least one possible implementation, when viewed along the axial direction of the motor, the groove segment is a trapezoid with a narrow bottom and a wide top.

[0014] The embodiments of this application also propose an electric bridge system, including the motor described in any of the above technical solutions.

[0015] In at least one possible implementation, the bridge system is a coaxial bridge system or a parallel-axis bridge system.

[0016] By adopting the above technical solution, cooling oil is supplied to the oil collection tank through the overflow of the oil guiding element, avoiding or reducing the splashing or rebound of cooling oil to other positions, thereby achieving higher oil supply efficiency. Attached Figure Description

[0017] Figure 1 A partial structural schematic diagram of a bridge system according to an embodiment of this application is shown.

[0018] Figure 2 It shows Figure 1 A magnified view of a portion of the image.

[0019] Figure 3 A schematic diagram of the structure of the oil guide element of the motor of the bridge system according to an embodiment of this application is shown.

[0020] Figure 4 A schematic diagram of the oil guide element of the motor of the bridge system according to an embodiment of this application is shown from another angle.

[0021] Figure 5 A cross-sectional view of the oil guide element of the motor of the bridge system according to an embodiment of this application is shown.

[0022] Figure 6 Another cross-sectional view of the oil guide element of the motor of the bridge system according to an embodiment of this application is shown.

[0023] Explanation of reference numerals in the attached figures

[0024] 1. Oil guiding element; 11. Oil reservoir; 111. Peripheral wall; 111A. Arc segment; 111B. Groove segment; 112. End wall; 12. Oil inlet; 13. Oil outlet; 14. Mounting hole; 15. Anti-surge plate

[0025] 2 stators

[0026] 3 balance plates 31 oil collection tank

[0027] 4 Output shaft

[0028] 5. Motor shaft

[0029] 6 rotors

[0030] 7 Motor housing

[0031] A-axis, C-axis, circumferential direction, V-axis, vertical direction Detailed Implementation

[0032] To more clearly illustrate the above-mentioned objectives, features, and advantages of this application, specific embodiments of this application are described in detail in this section with reference to the accompanying drawings. Besides the embodiments described in this section, this application can also be implemented in other different ways. Those skilled in the art can make corresponding improvements, modifications, and substitutions without departing from the spirit of this application; therefore, this application is not limited to the specific embodiments disclosed in this section. The scope of protection of this application should be determined by the claims.

[0033] like Figures 1 to 6 As shown, an embodiment of this application proposes an electric bridge system, which includes a motor, a reducer, and an oil pump. As... Figure 1 As shown, the electric bridge system can be a coaxial electric bridge system. A "coaxial electric bridge system" means that the motor's rotor shaft and the output shaft of the electric bridge system are coaxial. Electric bridge systems can be used in the powertrain systems of electric or hybrid vehicles to drive the vehicle.

[0034] The motor includes a motor housing 7, a rotor 6, a motor shaft 5, an output shaft 4, a balance plate 3, a stator 2, and an oil guiding element 1. The rotor 6, motor shaft 5, output shaft 4, balance plate 3, stator 2, and oil guiding element 1 are all disposed inside the motor housing 7. The motor housing 7 may be part of the housing of an electric bridge system; in this application, no particular distinction is made between the motor housing and the electric bridge system housing. The motor shaft 5 can be connected to the rotor 6, and the motor shaft 5 is rotatably connected to the motor housing 7 relative to it. The stator 2 can be connected to the motor housing 7, and the stator 2 can be fitted radially outside the rotor 6, allowing the rotor 6 to rotate relative to the stator 2. The motor shaft 5 is a hollow shaft. The output shaft 4 is coaxially arranged with the motor shaft 5, and the output shaft 4 can be disposed inside the motor shaft 5. The balance plate 3 can be disposed at both axial ends of the rotor 6, and at least one balance plate 3 at one axial end of the rotor 6 can be provided with an oil collecting groove 31, which can be annular. The oil collection trough 31 can be formed by extending a wall plate from the main body of the balance plate 3. The wall plate can extend along the axial direction A and be inclined radially inward. The opening of the oil collection trough 31 faces radially inward to receive cooling oil. The oil guiding element 1 can be connected to the motor housing 7. The oil guiding element 1 is used to receive cooling oil and supply oil to the oil collection trough 31. The oil guiding element 1 can be provided at the bottom of the motor housing 7.

[0035] like Figures 3 to 6 The oil guiding element 1 may include an oil reservoir 11, an oil inlet 12, and an oil outlet 13. The oil reservoir 11 has a cavity for containing cooling oil, and an opening may be formed at the top of the oil reservoir 11. Both the oil inlet 12 and the oil outlet 13 are connected to the oil reservoir 11. The oil inlet 12 may be connected to an oil pump, so that the oil pump supplies cooling oil into the cavity of the oil reservoir 11 through the oil inlet 12.

[0036] In the vertical direction V, the oil outlet 13 is located above the oil inlet 12. When the level of the cooling oil in the oil reservoir 11 reaches the oil outlet 13, the cooling oil can overflow through the oil outlet 13. The oil outlet 13 can be located above the opening of the oil collection tank 31, and the oil outlet 13 can be set on the radially inner side of the oil collection tank 31 in the motor radial direction. The cooling oil overflowing from the oil outlet 13 can flow to the opening of the oil collection tank 31, thereby cooling the rotor 6.

[0037] The oil storage tank 11 may include a peripheral wall 111 and two end walls 112, which may be disposed at both axial ends of the peripheral wall 111. The oil inlet 12 and the oil outlet 13 are respectively disposed on both axial sides of the oil storage tank 11, that is, the oil inlet 12 and the oil outlet 13 are respectively disposed on the two end walls 112.

[0038] The peripheral wall 111 may include an arc segment 111A and a recessed segment 111B. The arc segment 111A may extend along an arc, and the recessed segment 111B may be located in the area between the two arc segments 111A, recessing from the arc segment 111A towards the radially outward side of the motor. The recessed segment 111B may be located at the lower part of the peripheral wall 111, thereby increasing the accommodating space of the oil reservoir 11. Cooling oil in the oil reservoir 11 may flow downward and preferentially accumulate in the recessed segment 111B. The recessed segment 111B can prevent excessive leakage of cooling oil from the oil reservoir 11 under bumpy vibration or motor tilting conditions. Viewed along the axial direction A of the motor, the recessed segment 111B may be a trapezoid with a narrow lower end and a wide upper end.

[0039] The oil inlet 12 can be located in the bottom area of ​​the oil reservoir 11, for example, the oil inlet 12 can be located on the end wall 112 corresponding to the groove section 111B. The cooling oil flowing into the oil reservoir 11 from the oil inlet 12 can directly enter the bottom of the oil reservoir 11.

[0040] like Figure 4 and Figure 6 As shown, the oil outlet 13 can be formed as a downwardly recessed arcuate plate, that is, the oil outlet 13 is defined by the upper surface of the arcuate plate. This arcuate plate can extend along the axial direction A and circumferential direction C of the motor. The arcuate plate can be located radially inside the oil collection groove 31, and the arcuate plate is parallel to the oil collection groove 31. This arcuate plate helps guide the cooling oil into the oil collection groove 31. For example, even when the motor vibrates or tilts, the relatively large arcuate plate-shaped oil outlet 13 can still guide the cooling oil into the oil collection groove 31.

[0041] like Figures 3 to 5 As shown, the oil guiding element 1 can be provided with a mounting hole 14. By passing a bolt through the mounting hole and screwing it into the threaded hole of the motor housing 7, the oil guiding element 1 can be connected to the motor housing 7, which is simple to assemble.

[0042] The oil guiding element 1 can be a plastic part made by injection molding, which is easy to mold and has a low cost.

[0043] like Figure 5 As shown, in at least one possible embodiment, a baffle plate 15 may be provided inside the oil reservoir 11. The baffle plate 15 may be a plate extending along the axial direction A of the motor and along the vertical direction V or the radial direction of the motor. Multiple baffle plates 15 may be provided, and the multiple baffle plates 15 may be parallel to each other to divide the oil reservoir 11 into multiple areas. The lower end of the baffle plate 15 may be connected to the arc segment 111A. The baffle plate 15 can keep the cooling oil in a small area, thereby reducing the noise and impact caused by the sloshing of the cooling oil.

[0044] Figure 1 and Figure 2The unidirectional arrows indicate the flow direction of the cooling oil. The cooling oil is pumped from the inside of the motor housing 7 through the oil inlet 12 to the cavity of the oil reservoir 11 using an oil pump. During the continuous oil supply process, the cooling oil fills the oil reservoir 11 and then overflows from the arc-shaped oil outlet 13 into the oil collection groove 31 of the balance plate 3 to supply oil to the rotor 6.

[0045] Of course, this application is not limited to the above-described embodiments. Those skilled in the art can make various modifications to the above-described embodiments of this application under the guidance of this application, without departing from the scope of this application.

[0046] (1) In the above embodiments, the oil guiding element 1 is used in a coaxial bridge system, but this application is not limited to this. In other possible embodiments, the oil guiding element can be used in a parallel-axis bridge system. A parallel-axis bridge system refers to a system in which the motor's rotating shaft (rotor shaft) and the output shaft of the bridge system are parallel but not on the same axis.

[0047] (2) In the above embodiment, the oil inlet 12 and the oil outlet 13 are respectively provided on both sides of the axial direction of the oil storage tank 11. However, this application is not limited to this. In other possible embodiments, the oil inlet may also be provided at the bottom or the periphery of the oil storage tank.

[0048] The oil guiding element, motor, and bridge system of this application can achieve the following beneficial effects.

[0049] (1) The oil guiding element proposed in this application can supply cooling oil to the oil collection tank 31 of the balance plate in an overflow manner, thereby avoiding or reducing the splashing or rebound of cooling oil to other positions, thus achieving higher oil supply efficiency.

[0050] (2) The oil guiding element proposed in this application can be used in coaxial bridge systems and parallel axis bridge systems, and has a wide range of applications.

[0051] (3) The oil guiding element 1 of the motor proposed in this application is located between the motor housing 7 and the balance plate 3. It does not require adjustment of the structure of the motor housing 7 and the balance plate 3. It has high scalability and can be used in motors and bridge systems of various structures.

[0052] (4) The oil guiding element is a plastic part made by injection molding process. The molding process is simple and the cost is low.

[0053] It should be understood that at least some aspects or features of the above-described implementation methods, embodiments, or examples can be appropriately combined.

[0054] It is understood that, in this application, when the number of parts or components is not specifically limited, the number can be one or more, where multiple refers to two or more. For cases where the number of parts or components shown in the drawings and / or described in the specification is, for example, two, three, four, etc., this specific number is generally exemplary and not restrictive, and can be understood as multiple, i.e., two or more; however, this does not mean that this application excludes the case of one.

[0055] In this application, unless otherwise expressly stated or limited, terms such as "installation," "assembly," "connection," "linking," "joining," "linking," "abutment," "communication," "connection," "conduction," "fixing," and "fastening" should be interpreted broadly, for example, they can be direct or indirect. For instance, regarding connection, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal communication of two components or the interaction between two components, unless otherwise expressly stated or limited. For instance, regarding communication / conduction, it can be direct communication / conduction or indirect communication / conduction through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0056] In this application, unless otherwise expressly stated or limited, a component being disposed / installed / located / enclosed / placed within, inside, or incorporated in another component can be either of the following two situations: a portion or a majority of the one component is located within the other component; or the one component is completely enclosed within the other component.

[0057] Although the present application has been described in detail using the above embodiments, it will be apparent to those skilled in the art that the present application is not limited to the embodiments described herein. The present application can be modified and implemented as alternative embodiments without departing from the spirit and scope of the present application as defined by the claims. Therefore, the description in this specification is for illustrative purposes only and does not have any limiting meaning for the present application.

Claims

1. An electric motor, characterized in that, Includes oil guiding elements and oil collection tanks. The oil collection trough is formed on the balance plate of the motor rotor and has an opening to receive cooling oil. The oil guiding element is installed on the motor housing and includes an oil reservoir and an oil outlet. The oil reservoir forms a cavity for containing cooling oil. The oil outlet communicates with the oil reservoir. In the vertical direction, the oil outlet is located above the opening of the oil collection tank. When the level of the cooling oil in the oil reservoir reaches the oil outlet, the cooling oil can overflow through the oil outlet and flow into the opening of the oil collection tank.

2. The motor according to claim 1, characterized in that, The oil collection trough is annular, with its opening facing radially inward. The oil outlet is located radially inward of the oil collection trough, and its height is higher than the height of the corresponding oil collection trough.

3. The motor according to claim 1, characterized in that, The oil collection groove is disposed on at least one of the balance plates at one axial end of the rotor.

4. The motor according to claim 1, characterized in that, The oil outlet is defined by a downwardly recessed arc plate that extends along the axial and circumferential directions of the motor.

5. The motor according to claim 1, characterized in that, The oil guiding element also includes an oil inlet. In the vertical direction, the oil outlet is located above the oil inlet. The oil inlet and the oil outlet are respectively located on both sides of the axial direction of the oil storage tank.

6. The motor according to claim 1, characterized in that, The oil storage tank is equipped with a baffle plate, which is a plate extending along the axial direction of the motor and in the vertical direction or radial direction of the motor.

7. The motor according to claim 1, characterized in that, The oil storage tank includes a peripheral wall and two end walls. The two end walls are disposed at both axial ends of the peripheral wall. The peripheral wall includes an arc segment and a groove segment. The arc segment extends along an arc. The groove segment is disposed in the area between the two arc segments. The groove segment is recessed from the arc segment toward the radially outer side of the motor.

8. The motor according to claim 7, characterized in that, Viewed along the axial direction of the motor, the groove segment is a trapezoid with a narrow bottom and a wide top.

9. A bridge system, characterized in that, The motor included in any one of claims 1 to 8.

10. The bridge system according to claim 9, characterized in that, The bridge system is a coaxial bridge system or a parallel-axis bridge system.

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