Rotor assembly

Abstract

The utility model relates to a rotor assembly, which comprises a rotating shaft and a rotor iron core, two ends of the rotor iron core are respectively provided with a rotor baffle A and a rotor baffle B, the rotor iron core is provided with a plurality of rotor iron core axial oil ways, and the rotor baffle A and the rotor baffle B are provided with a plurality of radial oil ways communicated with the rotor iron core axial oil ways. The interior of the rotating shaft is hollow to form a middle axial oil hole, and the side wall of the rotating shaft is further provided with a side wall oil hole used for communicating the middle axial oil hole with part of the radial oil duct; the rotor baffle A and the rotor baffle B are provided with oil spraying holes B. The radial oil channels comprise the baffle radial oil channel A and the baffle radial oil channel B. One end of the baffle radial oil channel A is communicated with the rotor iron core axial oil way, the other end of the baffle radial oil channel A is communicated with the oil spraying holes B. One end of the baffle radial oil channel B is communicated with the rotor iron core axial oil way, and the other end of the baffle radial oil channel B is communicated with the side wall oil holes. According to the utility model, the cooling efficiency of the rotor iron core can be improved, the cooling of the rotor iron core can be satisfied, and the stator coil can also be cooled.

Description

Technical Field

[0001] The utility model relates to a drive motor for a vehicle, and more specifically, to a rotor assembly. Background Art

[0002] With the continuous development of new energy vehicles and the gradual increase in the market's demand for the driving ability of new energy vehicles, the motors of new energy vehicles need to continuously increase the rotational speed, torque density, and power density on the premise that the volume is gradually compressed. The higher the rotational speed, torque density, and power density of the motor, the higher the heat generated by it. Therefore, the heat dissipation and cooling structure of the motor are essential for the reliable, stable, and efficient operation of the motor.

[0003] At present, the cooling of the motor can be divided into air cooling, water cooling, and oil cooling. The oil cooling method has become the first choice due to its natural electrical insulation, high degree of freedom in structural design, and other advantages. In related technologies, most of the motors of new energy vehicles are permanent magnet synchronous motors. When the motor operates in the high-speed region, the heat generation of the rotor of the motor increases sharply, and in severe cases, it may cause demagnetization of the magnetic steel, ultimately leading to problems such as power attenuation or loss of power of the motor. Therefore, if the rotor of the motor cannot be effectively cooled, it will directly affect the overall performance of the motor, resulting in low reliability, stability, and efficiency of the motor operation, and seriously affecting the reliable and stable operation of the vehicle. Summary of the Utility Model

[0004] In order to solve the above technical problems, the purpose of the utility model is to provide a rotor assembly that can not only meet the cooling of the rotor core but also cool the end part of the stator wire package.

[0005] In order to achieve the above utility model purpose, the utility model adopts the following technical solutions:

[0006] A rotor assembly includes a rotating shaft and a rotor core fixedly sleeved on the rotating shaft. Rotor baffles A and rotor baffles B are respectively arranged at both ends of the rotor core. A plurality of axial oil channels of the rotor core are arranged on the rotor core. A plurality of radial oil channels communicating with the axial oil channels of the rotor core are arranged on the rotor baffles A and rotor baffles B. The inside of the rotating shaft is hollow to form a central axial oil hole, and a side wall oil hole for communicating the central axial oil hole with some of the radial oil channels is also arranged on the side wall of the rotating shaft; spray holes B are arranged on both the rotor baffles A and rotor baffles B. The radial oil channels include baffle radial oil channels A and baffle radial oil channels B. One end of the baffle radial oil channel A communicates with the axial oil channel of the rotor core, and the other end communicates with the spray hole B. One end of the baffle radial oil channel B communicates with the axial oil channel of the rotor core, and the other end communicates with the side wall oil hole.

[0007] As a preferred solution: the baffle radial oil passages A and the baffle radial oil passages B are arranged at uniform intervals in the circumferential direction, and the positions of the baffle radial oil passages A on the rotor baffle A and the rotor baffle B are staggered with each other.

[0008] As a preferred solution: the oil injection hole B is close to the outer edge of the rotor baffle A or the rotor baffle B, and the oil injection hole B is inclined from the inside to the outside.

[0009] As a preferred solution: a bearing is further provided on the rotating shaft, and a bearing lubricating oil hole is provided on one side of the rotating shaft where the rotating shaft is located. The bearing lubricating oil hole is communicated with the central axial oil passage, and the bearing lubricating oil hole is also inclined so that one end of the bearing lubricating oil hole is aligned with the bearing.

[0010] As a preferred solution: one side of the rotor baffle A abuts against the rotor core, and the other side is axially limited by a steel pressing ring that is in interference fit with the rotating shaft.

[0011] As a preferred solution: a shaft shoulder is provided at one end of the rotating shaft, and the rotor baffle B abuts against the shaft shoulder.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0013] By providing an axial oil passage on the rotor core in the present utility model, and the axial oil passage is matched with the radial oil passages on the rotor baffle, the oil flow form from the rotating shaft to the rotor baffle realizes a two-way cross oil passage by rotating the angle of the rotor baffle, improving the cooling efficiency of the rotor core, and finally all the cooling oil is sprayed from the rotor baffle into the inner ring of the wire coil, which not only satisfies the cooling of the rotor core, but also can cool the stator wire coil. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The schematic diagrams of the accompanying drawings forming a part of the present application are used to provide a further understanding of the present application. The schematic embodiments of the present application and their descriptions are used to explain the present application and do not constitute a limitation to the present application.

[0015] Figure 1 and Figure 2 are the exploded structural schematic diagrams of two different angles of the present utility model;

[0016] Figure 3 is the front structural schematic diagram of the rotor baffle A of the present utility model;

[0017] Figure 4 is the reverse structural schematic diagram of the rotor baffle A of the present utility model;

[0018] Figure 5 is the structural schematic diagram of the rotating shaft of the present utility model.

[0019] The reference numerals are: 130, rotating shaft; 131, middle axial oil hole; 1311, side wall oil hole; 1312, bearing lubricating oil hole; 132, rotor iron core; 1321, rotor iron core axial oil passage; 133, rotor baffle A; 134, rotor baffle B; 135, oil injection hole B; 136, baffle radial oil passage A; 137, baffle radial oil passage B; 138, steel pressing ring. Detailed implementation manners

[0020] It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs.

[0021] It should be noted that the terms used herein are only for describing specific implementation manners and are not intended to limit the exemplary implementation manners according to this application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0022] In addition, in the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention.

[0023] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise stated, the meaning of "plural" is two or more, unless otherwise clearly defined.

[0024] In the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "connection", "linkage", "fixation", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0025] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0026] The present utility model will be further described below in conjunction with the drawings and embodiments:

[0027] As Figures 1 to 5 shown, a rotor assembly includes a rotating shaft 130 and a rotor core 132 fixedly sleeved on the rotating shaft 130. Rotor baffles A 133 and rotor baffles B 134 are respectively provided at both ends of the rotor core 132. A plurality of axial oil passages 1321 of the rotor core are provided on the rotor core 132. A plurality of radial oil passages communicating with the axial oil passages 1321 of the rotor core are provided on the rotor baffles A 133 and rotor baffles B 134. The inside of the rotating shaft 130 is hollow to form a central axial oil hole 131. Side wall oil holes 1311 for communicating the central axial oil hole 131 with some of the radial oil passages are further provided on the side wall of the rotating shaft 130. A bearing is further provided on the rotating shaft 130, and a bearing lubricating oil hole 1312 is provided on one side of the rotating shaft 130 where the bearing is located. The bearing lubricating oil hole 1312 communicates with the central axial oil hole 131. The bearing lubricating oil hole 1312 is inclined so that one end of the bearing lubricating oil hole 1312 is aligned with the bearing.

[0028] Both the rotor baffle A133 and the rotor baffle B134 are provided with oil injection holes B135. The oil injection holes B135 are close to the outer edge of the rotor baffle A133 or the rotor baffle B134, and the oil injection holes B135 are arranged obliquely from the inside to the outside. The radial oil passage includes a baffle radial oil passage A136 and a baffle radial oil passage B137, and the baffle radial oil passage A136 and the baffle radial oil passage B137 are evenly spaced in the circumferential direction. One end of the baffle radial oil passage A136 is communicated with the axial oil passage 1321 of the rotor core, and the other end is communicated with the oil injection hole B135. One end of the baffle radial oil passage B137 is communicated with the axial oil passage 1321 of the rotor core, and the other end is communicated with the side wall oil hole 1311. The positions of the baffle radial oil passage A136 on the rotor baffle A133 and the rotor baffle B134 are staggered with each other.

[0029] One end of the rotating shaft 130 is provided with a shaft shoulder. The rotor baffle B134 abuts against the shaft shoulder. One side of the rotor baffle A133 abuts against the rotor core 132, and the other side is axially limited by a steel pressing ring 138 that is interference-fitted with the rotating shaft 130.

[0030] The oil flow form from the rotating shaft to the rotor baffle realizes a two-way cross oil passage by rotating the angle of the rotor baffle. Finally, the oil is sprayed into the inner circle of the wire coil from the rotor baffle, and there is also a path that can be distributed to the bearing, which not only satisfies the cooling of the rotor core, but also cools the stator wire coil and takes into account the lubrication of the bearing.

[0031] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0032] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention without departing from the principle and purpose of the present invention. Any simple modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A rotor assembly, comprising a rotating shaft (130) and a rotor core (132) fixedly sleeved on the rotating shaft (130), characterized in that: At both ends of the rotor core (132), a rotor baffle A (133) and a rotor baffle B (134) are respectively provided. A plurality of axial oil passages (1321) of the rotor core are provided on the rotor core (132). A plurality of radial oil passages communicating with the axial oil passages (1321) of the rotor core are provided on the rotor baffle A (133) and the rotor baffle B (134). The inside of the rotating shaft (130) is hollow to form a central axial oil hole (131). A side wall oil hole (1311) for communicating the central axial oil hole (131) with some of the radial oil passages is further provided on the side wall of the rotating shaft (130). Injection holes B (135) are provided on both the rotor baffle A (133) and the rotor baffle B (134). The radial oil passages include a baffle radial oil passage A (136) and a baffle radial oil passage B (137). One end of the baffle radial oil passage A (136) communicates with the axial oil passage (1321) of the rotor core, and the other end communicates with the injection hole B (135). One end of the baffle radial oil passage B (137) communicates with the axial oil passage (1321) of the rotor core, and the other end communicates with the side wall oil hole (1311).

2. The rotor assembly according to claim 1, characterized in that: The baffle radial oil passage A (136) and the baffle radial oil passage B (137) are arranged at uniform intervals in the circumferential direction, and the positions of the baffle radial oil passage A (136) on the rotor baffle A (133) and the rotor baffle B (134) are staggered with each other.

3. A rotor assembly according to claim 1, wherein: The injection hole B (135) is close to the outer edge of the rotor baffle A (133) or the rotor baffle B (134), and the injection hole B (135) is inclined from the inside to the outside.

4. A rotor assembly according to claim 1, wherein: A bearing is further provided on the rotating shaft (130), and a bearing lubricating oil hole (1312) is provided on one side of the rotating shaft (130) where the bearing is located. The bearing lubricating oil hole (1312) communicates with the central axial oil hole (131). The bearing lubricating oil hole (1312) is also inclined so that one end of the bearing lubricating oil hole (1312) is aligned with the bearing.

5. A rotor assembly according to claim 1, characterized in that: One side of the rotor baffle A (133) abuts against the rotor core (132), and the other side is axially limited by a steel pressing ring (138) that is in interference fit with the rotating shaft (130).

6. A rotor assembly according to claim 1, characterized in that: A shoulder is provided at one end of the rotating shaft (130), and the rotor baffle B (134) abuts against the shoulder.

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