Oil slinging member for motor, motor and vehicle powertrain

Abstract

Provided in the present application is an oil slinging member for a motor, the oil slinging member being used for slinging, in a rotating state, oil fluid thereon onto a stator (230) of a motor (200) by means of centrifugal force, so as to cool the stator (230). The oil slinging member (100) comprises: a side portion (110), which is configured to be fixedly mounted to a rotation component of the motor (200); and a rim portion (120), which extends obliquely with respect to the axial direction (A) of the side portion (110) and the oil slinging member (100). The rim portion (120) comprises one or more first blades (121) and one or more second blades (122), the first blades (121) and the second blades (122) being located at different positions in the circumferential direction (C) of the rim portion (120) and having different inclination angles with respect to the axial direction (A). The present application further provides a motor and a vehicle powertrain.

Description

Oil slinger components for electric motors, electric motors and vehicle power systems Technical Field

[0001] This application relates to the cooling of electric motors, and more particularly to oil slingers for electric motors, electric motors, and vehicle power systems. Background Technology

[0002] Electric motors have been widely used in new energy vehicles. As motor speeds continue to increase, effective motor cooling becomes increasingly important. Summary of the Invention

[0003] The purpose of this application is to provide an oil-slinging component for an electric motor that can improve the cooling effect of the stator.

[0004] The purpose of this application is also to provide an electric motor including the oil slinger for the electric motor, and a vehicle power system including the oil slinger or the electric motor.

[0005] This application provides an oil-throwing component for an electric motor, which uses centrifugal force to throw oil onto the stator of the motor during rotation to cool the stator. The oil-throwing component includes:

[0006] The side portion, which is ring-shaped, is used for fixing and mounting the rotating components to the motor; and

[0007] An edge portion, which connects to the outer periphery of the side portion, extends obliquely relative to the axial direction of the side portion and the oil-slinging member.

[0008] The edge portion includes one or more first blades and one or more second blades, the first blades and the second blades being located at different circumferential positions of the edge portion and having different inclination angles relative to the axial direction.

[0009] In at least one embodiment, the edge portion further includes one or more third blades, wherein the first blade, the second blade, and the third blade are located at different positions in the circumferential direction of the edge portion and have different inclination angles relative to the axial direction.

[0010] In at least one embodiment, multiple first blades, second blades, and third blades are provided, and the first blades, second blades, and third blades are arranged alternately in the circumferential direction.

[0011] In at least one embodiment, the first blade, the second blade, and the third blade are disconnected from each other in the circumferential direction or connected together via a connecting portion.

[0012] In at least one embodiment, the oil-sparging component is a single piece formed of metal or plastic.

[0013] An embodiment of this application also provides an electric motor, which includes:

[0014] stator;

[0015] The outer rotor located radially outside the stator; and

[0016] According to the oil-spraying component of this application,

[0017] The oil-throwing component is fixedly installed relative to the outer rotor, so that as it rotates with the outer rotor, the oil-throwing component uses centrifugal force to throw the oil on it to the axial end of the stator.

[0018] In at least one embodiment, the motor is a two-in-one motor, the outer rotor is the rotor of the outer motor, and the motor further includes:

[0019] An external motor shaft is driven to the external rotor via an external rotor bracket, and the oil-throwing component is fixedly mounted to the external rotor bracket via its side.

[0020] In at least one embodiment, the two-in-one motor includes an inner motor and an outer motor, wherein the inner motor includes an inner rotor located radially inside the stator.

[0021] The motor also includes a clutch installed between the inner rotor and the outer rotor to enable or disengage the transmission connection between the inner rotor and the outer rotor. The oil in the clutch can reach the oil throwing member under the action of centrifugal force and be thrown by the oil throwing member to different radial positions at the axial end of the stator.

[0022] In at least one embodiment, the dual-motor includes an inner motor and an outer motor, wherein the inner motor and the outer motor share a common stator core.

[0023] Embodiments of this application also provide a vehicle power system, which includes an oil slinger or an electric motor according to this application. Attached Figure Description

[0024] Figure 1 shows a perspective view of an oil-spraying component.

[0025] Figure 2 shows a schematic diagram of the working state of the oil-slinging component shown in Figure 1 in the motor.

[0026] Figure 3A shows a perspective view of an oil-sparging component according to one embodiment of this application.

[0027] Figure 3B shows a partially enlarged view of the oil-slinging component in Figure 3A.

[0028] Figure 3C shows an oblique view of the oil-slinging component in Figure 3A.

[0029] Figure 4 shows a front view of the oil-slinging component in Figure 3A.

[0030] Figure 5 shows a schematic diagram of the structure of an electric motor according to one embodiment of the present application, wherein the working state of the oil slinger in the electric motor is shown.

[0031] Figure 6 shows a schematic diagram of the stator core of an electric motor according to one embodiment of this application.

[0032] Figure 7 is a block diagram showing the connection relationship of a portion of the structure of a motor according to one embodiment of this application. Detailed Implementation

[0033] Exemplary embodiments of this application are described below with reference to the accompanying drawings.

[0034] In this application, the radial direction of the motor refers to the radial direction of the rotor or stator of the motor, the inner radial direction refers to the side that is closer to the central axis of the motor in the radial direction (e.g., closer to the inner motor shaft 212), and the outer radial direction is the side that is farther away from the central axis of the motor in the radial direction (e.g., farther away from the inner motor shaft 212).

[0035] In this application, a transmission connection refers to a connection in which two components can rotate together, and the two components can be directly or indirectly connected.

[0036] Figure 1 shows a perspective view of an oil-slinging component 100. Figure 2 shows a schematic diagram of the oil-slinging component 100 shown in Figure 1 in operation within a motor 200.

[0037] Referring to Figures 1 and 2, the oil-slinging member 100 is generally bowl-shaped, including a side (or bottom) 110 and an edge 120. The side 110 may be a planar annular shape, and the edge 120 is connected to the outer periphery of the side 110 and extends obliquely relative to the side 110.

[0038] Here, the motor 200 can be a two-in-one motor, comprising an inner motor 210 and an outer motor 220, which can share a stator 230. The oil-throwing component 100 can be drivenly connected to the outer rotor 221 of the outer motor 220. When the outer rotor 221 rotates (as shown by the hollow arrow in Figure 2), the oil-throwing component 100 can, under the action of centrifugal force, throw the oil on it onto the stator 230 (as shown by the dashed arrow in Figure 2), thereby cooling the stator 230.

[0039] Here, the edge portion 120 can be annular, and the inclination angle at different positions in its circumference can be the same. This oil-slinging component 100 has a simple structure, is easy to manufacture, and has low cost.

[0040] When the external motor shaft rotates, the oil thrown out by the oil slinger 100 will impact the same radial position of the stator 230, which limits the cooling effect on the stator 230, especially when the thickness of the stator 230 in the radial direction R is large.

[0041] In view of the above, embodiments of this application also provide an oil-slinging component as shown in Figures 3A to 5.

[0042] As shown in Figures 3A to 7, an embodiment of this application provides an oil-throwing component for an electric motor, which uses centrifugal force to throw oil onto the stator 230 of the motor 200 during rotation to cool the stator 230.

[0043] As shown in Figures 3A to 5, the oil-slinging component 100 may include a side portion 110 and an edge portion 120. The side portion 110 may be annular for fixing rotating components (e.g., the outer rotor bracket 223 described later) to the motor 200. Here, the side portion 110 may in particular be a flat annular shape.

[0044] The edge portion 120 is connected to the outer periphery 111 of the side portion 110 and extends obliquely relative to the axial direction A of the side portion 110 and the oil-slinging member 100. The edge portion 120 may include one or more first blades 121 and one or more second blades 122, the first blades 121 and the second blades 122 being located at different positions on the circumferential direction C of the edge portion 120 and having different inclination angles relative to the axial direction A.

[0045] It is understood that in the axial section of the oil-splattering component 100, the edge portion 120 can be a straight line or a straight line with a chamfer, or the edge portion 120 can be an arc shape, etc. The inclination angle of the edge portion 120 relative to the axial direction A can be the angle of the line connecting its two axial ends relative to the axial direction A. This angle can disregard the chamfered portion connecting the edge portion 120 and the side portion 110.

[0046] Referring to Figures 4 and 5, because the first blade 121 and the second blade 122 have different inclination angles relative to the axial direction A, when the oil-throwing member 100 rotates (as shown by the hollow arrow in Figure 5) and throws oil onto the stator 230, the blades with different inclination angles can throw the oil to different radial positions on the stator 230 (as shown by the dashed arrow in Figure 5), allowing the stator 230 to be cooled at more locations. This improves the cooling efficiency of the stator.

[0047] Optionally, the edge portion 120 may also include one or more third blades 123, wherein the first blade 121, the second blade 122 and the third blade 123 are located at different positions on the circumferential C of the edge portion 120 and have different inclination angles relative to the axial direction A.

[0048] Of course, the edge portion 120 may also include more blades with different tilt angles. Here, preferably, the blades may have 2 to 6 different tilt angles.

[0049] Optionally, multiple first blades 121, second blades 122, and third blades 123 are provided, and the first blades 121, second blades 122, and third blades 123 are arranged alternately in the circumferential direction C. It can be understood that the alternating arrangement here means that there is a second blade 122 between two circumferentially adjacent first blades 121, or a second blade 122 and a third blade 123, rather than two first blades 121 being directly adjacent. The same applies to the second blades 122 and third blades 123.

[0050] As shown in Figure 4, there can be three of each of the first blade 121, the second blade 122, and the third blade 123. However, this application is not limited to this. For example, the number of blades at the same tilt angle can be two to six.

[0051] Optionally, the first blade 121, the second blade 122, and the third blade 123 are separated from each other in the circumferential direction C, or connected together via a connecting portion. Figures 3A and 4 show the case where the first blade 121, the second blade 122, and the third blade 123 are separated from each other in the circumferential direction C, thus forming a gap 124 between adjacent blades. In the case of manufacturing the oil-sparging component by metal stamping, the circumferentially separated blades facilitate the forming of the oil-sparging component.

[0052] When the blades of the oil-throwing component 100 are connected together in the circumferential direction C by a connecting part, oil leakage from the gap between adjacent blades can be prevented, thereby improving the utilization rate of oil.

[0053] Optionally, the oil-spraying component 100 can be a single piece formed of metal or plastic. For example, the oil-spraying component 100 can be a metal stamping or a molded plastic part. Of course, this application is not limited to this; for example, the oil-spraying component 100 can also be manufactured by spinning, casting, or other methods.

[0054] Referring to Figure 3A, a central hole 112 may be formed in the side portion 110. Mounting holes 113 and clearance holes 114 may be provided on the side portion 110. Multiple mounting holes 113 and multiple clearance holes 114 may be evenly distributed at intervals in the circumferential direction of the side portion 110. The clearance hole 114 allows components of the clutch, described later, to pass through.

[0055] Here, the width of the blades is not limited, and their radial outer edges can be located on the same circle or on different circles. The radial outer edges of the blades can be located at the same axial position or at different axial positions. Optionally, in one example, the oil-sparging component can be formed from a metal ring by spinning and / or stamping. In this way, in the final oil-sparging component, blades with the same tilt angle have the same shape and size, and blades with different tilt angles have the same size, but the position of their radial outer edges is different due to the different tilt angles.

[0056] Referring to Figures 5 to 7, embodiments of this application also provide an electric motor, which may include: a stator 230; an outer rotor 221 located radially outside the stator 230; and an oil-throwing member 100. The oil-throwing member 100 may be fixedly mounted relative to the outer rotor 221, so that during rotation with the outer rotor 221, the oil-throwing member 100 uses centrifugal force to throw the oil on it onto the axial end of the stator 230 to cool the stator 230, including cooling the stator core 231 and windings.

[0057] Optionally, referring to Figures 5 and 7, the motor 200 can be a two-in-one motor, the outer rotor 221 is the rotor of the outer motor 220, the motor 200 also includes an outer motor shaft 222, which is connected to the outer rotor 221 via an outer rotor bracket 223, and the oil slinger is fixedly mounted to the outer rotor bracket 223 via its side 110.

[0058] Optionally, the two-in-one motor includes an inner motor 210 and an outer motor 220. The inner motor 210 includes an inner rotor 211 located radially inside the stator 230. The motor 200 may also include a clutch 240, which is installed between the inner rotor 211 and the outer rotor 221 to enable or disengage the transmission connection between the inner rotor 211 and the outer rotor 221. The oil in the clutch 240 can reach the oil slinger 100 under the action of centrifugal force and be thrown by the oil slinger 100 to different radial positions at the axial end of the stator 230.

[0059] It is understood that the source of the oil on the oil-throwing member 100 and the installation position of the oil-throwing member 100 are not limited here. For example, in one example, the oil agitated by the inner rotor 211 can also reach the oil-throwing member 100. In another example, the oil-throwing member 100 can also be installed on the outer motor shaft 222.

[0060] Optionally, the inner motor 210 and the outer motor 220 share the stator core 230.

[0061] Referring to Figure 6, the stator core 231 may include multiple silicon steel sheets integrally stamped, which are stacked to form the core body. Multiple inner stator conductor slots 2312 are provided on the inner periphery of the core body, while multiple outer stator conductor slots 2311 are provided on the outer periphery. It can be understood that the inner stator conductor slots 2312 are located radially inward of the core body, while the outer stator conductor slots 2311 are located radially outward of the core body. The multiple outer stator conductor slots 2311 can be evenly spaced C apart circumferentially, and the multiple inner stator conductor slots 2312 can be evenly spaced C apart circumferentially.

[0062] Furthermore, the inner stator conductor slot 2312 is used to install the stator winding of the inner motor 210, forming the inner motor winding; the outer stator conductor slot 2311 is used to install the stator winding of the outer motor 220, forming the outer motor winding. The oil thrown out by the oil slinger 100 can simultaneously cool the outer motor winding, the inner motor winding, and the iron core body between them.

[0063] Optionally, an oil passage may be provided in the radial center 2313 of the core body, through which oil can cool the stator core 231.

[0064] Referring to Figures 5 and 7, the outer rotor 221 can be driven to the outer motor shaft 222 via the outer rotor bracket 223. The inner rotor 211 can be driven to the inner motor shaft 212. The outer motor shaft 222 can be a hollow shaft, through which the inner motor shaft 212 passes. Here, the oil slinger 100 can be mounted to the outer rotor bracket 223 via its mounting hole 113 using bolts, rivets, etc.

[0065] The clutch 240 may include a first clutch portion 241 and a second clutch portion 242. The first clutch portion 241 is driveably connected to the outer rotor support 223, and the second clutch portion 242 is driveably connected to the inner rotor shaft 212. The clutch actuation mechanism can engage the first clutch portion 241 and the second clutch portion 242, allowing the outer rotor 221 and the inner rotor 211 to rotate together. The clutch actuation mechanism can also disengage the first clutch portion 241 and the second clutch portion 242, decoupling the outer rotor 221 and the inner rotor 211.

[0066] Embodiments of this application also provide a vehicle power system, which includes the aforementioned oil slinger 100 or an electric motor.

[0067] The vehicle powertrain may also include a transmission mechanism consisting of an engine and gears. This powertrain can constitute a hybrid powertrain. In one example, the external motor 220 can be an electric motor, primarily used to drive the vehicle, while the internal motor 210 can be a generator, primarily used to generate electricity driven by the engine. When the clutch 240 is engaged, either the internal motor 210 or the engine can also drive the vehicle.

[0068] It should be understood that at least some aspects or features of the above-described implementation methods, embodiments, or examples can be appropriately combined.

[0069] 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.

[0070] This application is not limited to the above-described embodiments, examples, or examples. Those skilled in the art can make various modifications to the above-described embodiments, examples, or examples without departing from the scope of this application, based on the teachings of this application.

[0071] List of reference numerals: 100 Oil slinger component; 110 Side portion; 111 Outer periphery; 112 Center hole; 113 Mounting hole; 114 Clearance hole; 120 Edge portion; 121 First blade; 122 Second blade; 123 Third blade; 124 Clearance; 200 Motor; 210 Inner motor; 211 Inner rotor; 212 Inner motor shaft; 220 Outer motor; 221 Outer rotor; 222 Outer motor shaft; 223 Outer rotor support; 230 Stator; 231 Stator core; 2311 Outer stator conductor slot; 2312 Inner stator conductor slot; 2313 Radial center portion; 240 Clutch; 241 Clutch first part; 242 Clutch second part; A Axial; C Circumferential; R Radial

Claims

1. An oil-throwing member for an electric motor, used in a rotating state to throw oil onto the stator (230) of an electric motor (200) by centrifugal force, for cooling the stator (230), the oil-throwing member (100) comprising: The side (110), which is annular, is used to fix the rotating part to the motor (200); as well as An edge portion (120), which connects to the outer periphery (111) of the side portion (110), extends obliquely relative to the axial direction (A) of the side portion (110) and the oil-slinging member (100). The edge portion (120) includes one or more first blades (121) and one or more second blades (122), the first blades (121) and the second blades (122) being located at different positions on the circumferential (C) of the edge portion (120) and having different inclination angles relative to the axial (A).

2. The oil-sparging component for an electric motor according to claim 1, characterized in that, The edge portion (120) further includes one or more third blades (123), the first blade (121), the second blade (122) and the third blade (123) being located at different positions on the circumferential (C) of the edge portion (120) and having different tilt angles relative to the axial (A).

3. The oil-sparging component for an electric motor according to claim 2, characterized in that, Multiple first blades (121), second blades (122) and third blades (123) are provided, and the first blades (121), second blades (122) and third blades (123) are arranged alternately in the circumferential direction (C).

4. The oil-sparging component for an electric motor according to claim 2, characterized in that, The first blade (121), the second blade (122) and the third blade (123) are disconnected from each other in the circumferential direction (C) or connected together via a connecting part.

5. The oil-sparging component for an electric motor according to claim 1, characterized in that, The oil-spraying component is a single piece made of metal or plastic.

6. An electric motor, comprising: Stator (230); The outer rotor (221) is located radially outside the stator (230); as well as The oil-sparging component (100) according to any one of claims 1 to 5, The oil-throwing component (100) is fixedly installed relative to the outer rotor (221), so that as it rotates with the outer rotor (221), the oil-throwing component (100) uses centrifugal force to throw the oil on it to the axial end of the stator (230).

7. The motor according to claim 6, characterized in that, The motor (200) is a two-in-one motor, the outer rotor (221) is the rotor of the outer motor (220), and the motor (200) further includes: An external motor shaft (222) is driven to the external rotor (221) via an external rotor bracket (223), and the oil-throwing component is fixedly mounted to the external rotor bracket (223) via its side (110).

8. The motor according to claim 7, characterized in that, The two-in-one motor includes an inner motor (210) and an outer motor (220). The inner motor (210) includes an inner rotor (211) located radially inside the stator (230). The motor (200) also includes a clutch (240), which is installed between the inner rotor (211) and the outer rotor (221) to enable or disengage the transmission connection between the inner rotor (211) and the outer rotor (221). The oil in the clutch (240) can reach the oil throwing member (100) under the action of centrifugal force and be thrown by the oil throwing member (100) to different radial positions at the axial end of the stator (230).

9. The motor according to claim 7, characterized in that, The two-in-one motor includes an inner motor (210) and an outer motor (220), and the inner motor (210) and the outer motor (220) share a stator core (230).

10. A vehicle powertrain system, characterized in that, It includes the oil-slinging component (100) according to any one of claims 1 to 5 or the motor according to any one of claims 6 to 9.

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