Compact rotor structure

Abstract

The utility model relates to a compact rotor structure, which comprises a rotating shaft and a rotor iron core, one end of the rotor iron core is provided with a dynamic balance plate, the dynamic balance plate is fixed at one end of the rotor iron core through a steel compression ring, the inner ring of the dynamic balance plate is provided with a convex ring A, so that the inner ring of the dynamic balance plate forms a step surface, the steel compression ring is provided with a convex ring B, and the convex ring B is fixed at the other end of the rotor iron core. The outer ring of the steel compression ring forms a step surface, the steel compression ring is in interference fit with the rotating shaft, and the steel compression ring compresses the dynamic balance plate at one end of the rotor iron core through the matching of the two step surfaces. According to the utility model, the steel compression ring is designed into a sunken step-shaped structure and is embedded into the dynamic balance plate of the rotor, so that the axial size is reduced as much as possible under the condition that the structural stability of the rotor is ensured.

Description

Technical Field

[0001] This utility model belongs to the field of new energy motor technology, and in particular relates to a compact rotor structure. Background Technology

[0002] The rotor is a crucial component of a drive motor, and the structural dimensions of the drive motor, especially its axial dimension, largely depend on the arrangement of the rotor's axial structure. The traditional rotor arrangement involves first installing the rotor core, dynamic balancing plate, and clamping rings at the shaft ends to lock the rotor core, then installing the bearings at both ends, and finally installing the resolver rotor. Rotor structures installed in this way often have a large axial distance, which cannot meet the requirements in many applications. Therefore, how to further reduce the axial dimension of the shaft while still meeting the overall heat dissipation performance of the drive motor has become a pressing technical problem for those skilled in the art. Utility Model Content

[0003] In order to solve the above-mentioned technical problems, the purpose of this utility model is to provide a compact rotor structure with a compact axial dimension.

[0004] To achieve the above-mentioned objectives, this utility model adopts the following technical solution:

[0005] A compact rotor structure includes a shaft and a rotor core. One end of the rotor core is provided with a dynamic balancing plate. The dynamic balancing plate is fixed to one end of the rotor core by a steel pressure ring. The inner ring of the dynamic balancing plate is provided with a convex ring A, so that the inner ring of the dynamic balancing plate forms a stepped surface. The steel pressure ring is provided with a convex ring B, so that the outer ring of the steel pressure ring forms a stepped surface. The steel pressure ring is interference-fitted with the shaft, and through the cooperation of the two stepped surfaces, the steel pressure ring presses the dynamic balancing plate tightly against one end of the rotor core.

[0006] As a preferred embodiment: the dynamic balancing plate is further provided with a radial oil passage A, and the outer side of the dynamic balancing plate is also provided with an oil throwing hole A. The oil throwing hole A is connected to the radial oil passage A. A hollow oil channel is formed between the steel pressure ring and the rotor core, and the hollow oil channel is connected to the radial oil passage A and the side wall oil hole.

[0007] As a preferred embodiment: the dynamic balancing plate is also provided with an anti-rotation protrusion A, and the steel pressure ring is provided with a corresponding anti-rotation notch, and the anti-rotation protrusion A is inserted into the anti-rotation notch.

[0008] As a preferred embodiment, the dynamic balancing plate is provided with a plurality of fan-shaped through holes evenly distributed, so that the dynamic balancing plate forms an eddy current rotor.

[0009] As a preferred embodiment: the other end of the rotor core is also provided with a baffle, which is also fixed by a steel pressure ring. The inner ring of the baffle is also provided with a convex ring, so that the inner ring of the baffle forms a stepped surface. The steel pressure ring is provided with a convex ring B, so that the outer ring of the steel pressure ring forms a stepped surface. The steel pressure ring is interference-fitted with the rotating shaft, and through the cooperation of the two stepped surfaces, the steel pressure ring presses the baffle tightly against one end of the rotor core.

[0010] As a preferred embodiment: the baffle is further provided with a radial oil passage B, and the outer side of the baffle is also provided with an oil throwing hole B. The oil throwing hole B is connected to the radial oil passage B. A hollow oil channel is formed between the steel pressure ring and the rotor core, and the hollow oil channel is connected to the radial oil passage B and the side wall oil hole.

[0011] As a preferred embodiment: the baffle is further provided with an anti-rotation protrusion B, and the steel pressure ring is provided with a corresponding anti-rotation notch, and the anti-rotation protrusion B is inserted into the anti-rotation notch.

[0012] As a preferred embodiment: the rotating shaft is provided with an axial oil passage, and the axial oil passage is also provided with a side wall oil hole, the rotor core is provided with a radial oil throwing passage, and the side wall oil hole is connected to the radial oil throwing passage.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] This invention designs the steel pressure ring as a sunken stepped structure and embeds it inside the rotor dynamic balance plate, thereby minimizing the axial dimension while ensuring the stability of the rotor structure. Attached Figure Description

[0015] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute a limitation thereof.

[0016] Figure 1 This is a schematic diagram of the overall structure of a motor using the rotor structure of this utility model;

[0017] Figure 2 and Figure 3 This is an exploded structural diagram of a motor using the rotor structure of this utility model;

[0018] Figure 4 and Figure 5 This is a schematic diagram of the rotor of this utility model at two different angles;

[0019] Figure 6 and Figure 7 This is an exploded structural diagram of the rotor of this utility model at two different angles;

[0020] Figure 8This is an exploded structural diagram of the rotor and cover plate A of this utility model;

[0021] Figure 9 This is a cross-sectional structural diagram of the rotor and cover plate A of this utility model.

[0022] The attached figures are labeled as follows: 1. Housing; 11. Cover plate A; 110. Bearing chamber; 111. Oil pipe cover; 112. Rotor oil pipe; 117. Radial oil inlet pipe; 118. Cover plate connecting hole; 119. Bearing; 12. Cover plate B; 13. Oil inlet pipe; 14. Oil outlet pipe; 2. Stator; 3. Rotor; 31. Shaft; 311. Side wall oil hole; 310. Axial oil passage; 32. Rotor core; 33. Dynamic balance plate; 331. Fan-shaped through hole; 332. Radial oil passage A; 330. Oil slinger hole A; 333. 334. Anti-rotation protrusion A; 34. Baffle; 341. Anti-rotation protrusion B; 340. Oil slinger hole B; 342. Radial oil passage B; 35. Steel pressure ring; 351. Anti-rotation notch; 352. Protrusion B; 36. Hollowed-out oil passage; 4. Spray pipe assembly; 5. Eddy current stator; 6. Oil seal. Detailed Implementation

[0023] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0024] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0025] Furthermore, in the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0026] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more, unless otherwise expressly defined.

[0027] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0028] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0029] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0030] like Figures 1 to 3 As shown, an oil-cooled motor includes a housing 1, a stator 2, and a rotor 3. The stator 2 is fixed inside the housing 1, and the rotor 3 is disposed inside the stator 2. Cover plates A11 and B12 are fixed at both ends of the housing 1, respectively. The rotor 3 includes a rotating shaft 31 and a rotor core 32. The two ends of the rotating shaft 31 are rotatably connected to cover plates A11 and B12 through bearings 119, respectively. The motor also includes a spray pipe assembly 4. A gap is left between the stator 2 and the housing 1, and the spray pipe assembly 4 is fixed in the gap. An oil inlet pipe 13 is also provided on the housing 1, which communicates with the spray pipe assembly 4. An oil outlet pipe 14 is also provided on the housing 1.

[0031] like Figures 4 to 7The compact rotor structure shown includes a dynamic balancing plate 33 at one end of the rotor core 32. The dynamic balancing plate 33 has multiple evenly spaced fan-shaped through holes 331, forming an eddy current rotor. An eddy current stator 5 is fixed to the cover plate A11 or cover plate B12 at a position corresponding to the dynamic balancing plate 33. This structure integrates the eddy current rotor and the rotor dynamic balancing plate into a single design, reducing the number of parts and saving costs, while also resulting in a more compact axial arrangement.

[0032] The dynamic balancing plate 33 is fixed to one end of the rotor core 32 by a steel pressure ring 35. The inner ring of the dynamic balancing plate 33 is provided with a convex ring A333, so that the inner ring of the dynamic balancing plate 33 forms a stepped surface. The steel pressure ring 35 is provided with a convex ring B352, so that the outer ring of the steel pressure ring 35 forms a stepped surface. The steel pressure ring 35 is interference-fitted with the rotating shaft 31, and through the cooperation of the two stepped surfaces, the steel pressure ring 35 presses the dynamic balancing plate 33 tightly to one end of the rotor core 32.

[0033] The dynamic balance plate 33 is also provided with a radial oil passage A332, and the outer side of the dynamic balance plate 33 is also provided with an oil throwing hole A330. The oil throwing hole A330 is connected to the radial oil passage A332. The steel pressure ring 35 and the rotor core 32 form a hollow oil channel 36, and the hollow oil channel 36 is connected to the radial oil passage A332 and the side wall oil hole 311.

[0034] The dynamic balance plate 33 is also provided with an anti-rotation protrusion A334, and the steel pressure ring 35 is provided with a corresponding anti-rotation notch 351. The anti-rotation protrusion A334 is inserted into the anti-rotation notch 351.

[0035] The other end of the rotor core 32 is also provided with a baffle 34, which is also fixed by a steel pressure ring 35. The inner ring of the baffle 34 is also provided with a convex ring, so that the inner ring of the baffle 34 forms a stepped surface. The steel pressure ring 35 is provided with a convex ring B352, so that the outer ring of the steel pressure ring 35 forms a stepped surface. The steel pressure ring 35 is interference-fitted with the rotating shaft 31, and through the cooperation of the two stepped surfaces, the steel pressure ring 35 presses the baffle 34 tightly against one end of the rotor core 32.

[0036] The above structure designs the steel pressure ring as a sunken stepped structure and embeds it into the rotor dynamic balance plate and baffle. While ensuring the oil flow function, it compresses the axial dimension as much as possible. Furthermore, both ends of the rotor are limited by steel pressure rings, eliminating the design of rotor shaft shoulders. By controlling the pressing position of the iron core through tooling, the axial dimension of the rotor can be further reduced.

[0037] The baffle 34 is also provided with a radial oil passage B342, and the outer side of the baffle 34 is also provided with an oil throwing hole B340. The oil throwing hole B340 is connected to the radial oil passage B342. The steel pressure ring 35 and the rotor core 32 form a hollow oil channel 36, and the hollow oil channel 36 is connected to the radial oil passage B342 and the side wall oil hole 311.

[0038] The baffle 34 is also provided with an anti-rotation protrusion B341, and the steel pressure ring 35 is provided with a corresponding anti-rotation notch 351. The anti-rotation protrusion B341 is inserted into the anti-rotation notch 351.

[0039] like Figure 8 and Figure 9 As shown, in this oil-cooled motor, the rotating shaft 31 is also provided with an axial oil passage 310, and the axial oil passage 310 is also provided with a side wall oil hole 311. The cover plate A11 or the cover plate B12 is provided with a radial oil inlet pipe 117. One end of the radial oil inlet pipe 117 is connected to the spray pipe assembly 4, and the other end of the radial oil inlet pipe 117 extends outward into the axial oil passage 310. The rotor core 32 is provided with a radial oil throwing passage, and the side wall oil hole 311 is connected to the radial oil throwing passage.

[0040] An oil pipe cover 111 is also fixed on the cover plate A11. The radial oil inlet pipe 117 is arranged in the oil pipe cover 111. One end of the oil pipe cover 111 extends to form a rotor oil pipe 112 that extends into the rotating shaft 31. The other end of the oil pipe cover 111 is provided with a cover plate communication hole 118. The axial spray oil pipe 41 passes through the cover plate A11 and is inserted into the cover plate communication hole 118, so that the rotor oil pipe 112, the radial oil inlet pipe 117 and the axial spray oil pipe 41 are interconnected.

[0041] The spray pipe assembly 4 is inserted into the cover plate A11 or the cover plate B12, and extends to the middle of the hollow shaft through the rotor oil pipe 112 on the cover plate A11 or the cover plate B12. Cooling oil can be introduced into the hollow shaft of the rotor. Then, several oil holes are evenly distributed on the circumference of the hollow shaft to guide the cooling oil into the baffle and the dynamic balance plate. Finally, the cooling oil is thrown onto the stator coil through the oil passage on the baffle and the dynamic balance plate to achieve cooling of the rotor and the coil.

[0042] The rotor of this invention reduces the total length from 249mm to 189mm without changing the external interface, a reduction of 24%. This not only greatly reduces the space occupied by the rotor, but also significantly reduces the manufacturing cost of the parts.

[0043] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0044] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled 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 principles and spirit of the present invention. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. A compact rotor structure, comprising a rotating shaft (31) and a rotor core (32), wherein a dynamic balancing plate (33) is provided at one end of the rotor core (32), and the dynamic balancing plate (33) is fixed to one end of the rotor core (32) by a steel pressure ring (35), characterized in that: The inner ring of the dynamic balance plate (33) is provided with a convex ring A (333), so that the inner ring of the dynamic balance plate (33) forms a stepped surface. The steel pressure ring (35) is provided with a convex ring B (352), so that the outer ring of the steel pressure ring (35) forms a stepped surface. The steel pressure ring (35) is interference-fitted with the rotating shaft (31), and through the cooperation of the two stepped surfaces, the steel pressure ring (35) presses the dynamic balance plate (33) against one end of the rotor core (32).

2. The compact rotor structure according to claim 1, characterized in that: The dynamic balance plate (33) is also provided with a radial oil passage A (332), and the outer side of the dynamic balance plate (33) is also provided with an oil slinger hole A (330). The oil slinger hole A (330) is connected to the radial oil passage A (332). A hollow oil channel (36) is formed between the steel pressure ring (35) and the rotor core (32), and the hollow oil channel (36) is connected to the radial oil passage A (332) and the side wall oil hole (311).

3. The compact rotor structure according to claim 1, characterized in that: The dynamic balance plate (33) is also provided with an anti-rotation protrusion A (334), and the steel pressure ring (35) is provided with a corresponding anti-rotation notch (351). The anti-rotation protrusion A (334) is inserted into the anti-rotation notch (351).

4. A compact rotor structure according to claim 1, characterized in that: The dynamic balance plate (33) is provided with a plurality of fan-shaped through holes (331) evenly distributed, so that the dynamic balance plate (33) forms an eddy current rotor.

5. A compact rotor structure according to claim 1, characterized in that: The other end of the rotor core (32) is also provided with a baffle (34), which is also fixed by a steel pressure ring (35). The inner ring of the baffle (34) is also provided with a convex ring, so that the inner ring of the baffle (34) forms a stepped surface. The steel pressure ring (35) is provided with a convex ring B (352), so that the outer ring of the steel pressure ring (35) forms a stepped surface. The steel pressure ring (35) is interference-fitted with the rotating shaft (31), and through the cooperation of the two stepped surfaces, the steel pressure ring (35) presses the baffle (34) against one end of the rotor core (32).

6. A compact rotor structure according to claim 5, characterized in that: The baffle (34) is also provided with a radial oil passage B (342), and the outer side of the baffle (34) is also provided with an oil throwing hole B (340). The oil throwing hole B (340) is connected to the radial oil passage B (342). The steel pressure ring (35) and the rotor core (32) form a hollow oil channel (36), and the hollow oil channel (36) is connected to the radial oil passage B (342) and the side wall oil hole (311).

7. A compact rotor structure according to claim 5, characterized in that: The baffle (34) is also provided with an anti-rotation protrusion B (341), and the steel pressure ring (35) is provided with a corresponding anti-rotation notch (351). The anti-rotation protrusion B (341) is inserted into the anti-rotation notch (351).

8. A compact rotor structure according to claim 1, characterized in that: The rotating shaft (31) is provided with an axial oil passage (310), and the axial oil passage (310) is also provided with a side wall oil hole (311). The rotor core (32) is provided with a radial oil throwing passage, and the side wall oil hole (311) is connected to the radial oil throwing passage.

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