Rotor structure and driving motor

Abstract

The embodiment of the utility model provides a rotor structure and a driving motor, and the rotor structure comprises an iron core assembly, the iron core assembly is configured to be of a block structure, the iron core assembly is configured with an occlusion station in the thickness direction, and the occlusion station is configured to be used for glue injection or injection molding so as to be used for pre-fixing the block structure. The iron core assembly is configured to be of a block structure, when glue injection or injection molding is carried out on an occlusion station of the iron core assembly, the iron core assembly can form a whole after glue curing, subsequent fixation of the periphery of the iron core assembly is facilitated, extra parts do not need to be added to fix the block structure of the iron core assembly, and the cost is reduced. And the performance of the driving motor is improved to the greatest extent while the strength of the iron core assembly at a high rotating speed is ensured.

Description

Technical Field

[0001] The present application relates to the field of motor technology, and in particular to a rotor structure and a drive motor. Background Art

[0002] At present, with the development of new energy vehicles, the requirements for drive motor performance and high speed are becoming higher and higher. In order to improve the performance of the motor, in addition to increasing the amount of magnetic steel and increasing the size of the motor, the rotor topology of the motor can also be optimized, such as reducing the thickness of the rotor core magnetic isolation bridge. The thickness and diameter of the magnetic isolation bridge affect the performance of the motor.

[0003] However, as the motor speed requirements become higher and higher, for the loose-piece rotor that completely eliminates the magnetic isolation bridge, it is difficult to wind carbon fiber since it is not a complete rotor, and it is difficult to achieve mass production. Utility Model Content

[0004] The purpose of the embodiments of the present application is to provide a rotor structure and a drive motor, which do not require additional parts to fix the block structure of the core assembly and can achieve mass production.

[0005] In a first aspect, an embodiment of the present application provides a rotor structure, comprising: a core assembly, wherein the core assembly is configured as a block structure, and the core assembly is provided with a bite station along its thickness direction, and the bite station is configured for glue injection or injection molding for pre-fixing the block structure.

[0006] In the above-mentioned implementation process, the core assembly is configured as a block structure. When the core assembly is injected with glue or injection molded at the biting station, the core assembly can be formed into a whole after the glue is cured, which is convenient for the subsequent fixation of the periphery of the core assembly. There is no need to add additional parts to fix the block structure of the core assembly, and mass production can be achieved.

[0007] In some embodiments, the core assembly includes a first core, the first core is provided with a first bite groove along a thickness direction thereof, and a plurality of the first bite grooves are distributed at intervals along a periphery of the first core.

[0008] In the above implementation process, the first iron core is provided with a first bite groove. When the first bite groove is injected with glue or molded, the first iron core can be fixed. After the glue is cured, the first iron core can be pulled to form a whole, which is convenient for fixation and can achieve mass production.

[0009] In some embodiments, the core assembly also includes a second core, which is disposed on the outside of the first core, and the second core is provided with a second bite groove along its thickness direction, the second bite groove is distributed corresponding to the first bite groove, and the second bite groove and the first bite groove are both configured to be open in a direction toward each other.

[0010] In the above-mentioned implementation process, the second iron core is provided with a second biting groove, and the first biting groove corresponds to the second biting groove, so that after the biting station composed of the first biting groove and the second biting groove is injected with glue or injection molded, the first iron core and the second iron core can be pulled after the glue is solidified, so that the first iron core and the second iron core form a whole, which is convenient for fixation and can realize mass production.

[0011] In some embodiments, the core assembly also includes a third core, which is disposed on the side of the second core facing away from the first core, and the third core is provided with a third bite groove along its thickness direction, and the second core is provided with a fourth bite groove corresponding to the third bite groove on the side close to the third core, and the third bite groove and the fourth bite groove are both configured to be open in directions toward each other.

[0012] In the above-mentioned implementation process, the third iron core is configured with a third biting groove, and the second iron core is configured with a fourth biting groove. The third biting groove corresponds to the fourth biting groove, so that after the biting station composed of the third biting groove and the fourth biting groove is injected with glue or injection molded, the second iron core and the third iron core can be pulled after the glue is solidified, so that the second iron core and the third iron core form a whole, which is convenient for fixation and can achieve mass production.

[0013] In some embodiments, a first groove is disposed on a side of the first core close to the second core, a plurality of first grooves are spaced apart along the periphery of the first core, and at least one first groove is disposed between two adjacent first engaging grooves.

[0014] In the above implementation process, the first iron core is also configured with a first groove, so that when the first iron core and the second iron core are fixed, not only can glue injection or injection molding be performed inside the first bite groove and the second bite groove, but glue injection or injection molding can also be performed inside the first groove, further ensuring the strength of the rotor structure at high speed while maximizing the performance of the drive motor.

[0015] In some embodiments, a second groove is disposed on a side of the second core close to the third core, a plurality of second grooves are spaced apart along the periphery of the second core, and at least one second groove is disposed between two adjacent second engaging grooves.

[0016] In the above implementation process, the second iron core is also configured with a second groove, so that when fixing the second iron core and the third iron core, not only can glue injection or injection molding be performed inside the third bite groove and the fourth bite groove, but glue injection or injection molding can also be performed inside the second groove, which is convenient for fixation and can achieve mass production.

[0017] In some embodiments, the rotor structure further includes a first magnetic steel, wherein the first magnetic steel connects the first iron core and the second iron core; and

[0018] The rotor structure further includes a second magnetic steel, and the second magnetic steel connects the second iron core and the third iron core.

[0019] In some embodiments, the rotor structure further comprises carbon fibers, and the carbon fibers are disposed on the core assembly, thereby ensuring the strength of the core assembly at high speeds and maximizing the performance of the drive motor.

[0020] In some embodiments, the rotor structure further includes a connecting component, and the core component is configured with a plurality of them along its thickness direction, and the connecting component connects the plurality of the core components.

[0021] In the above implementation process, several core assemblies are stacked through connecting assemblies to form a segmented oblique pole structure. At the same time, the rotor structure is simple and does not require additional parts for fixing. The speed of the drive motor can be increased to ensure the NVH performance of the drive motor.

[0022] In a second aspect, the present application also provides a drive motor, comprising a rotor structure as described in any one of the above items.

[0023] In the above implementation process, the rotor structure is a block skewed pole structure without the magnetic isolation bridge. The structure is simple and does not require additional parts for fixing. After using the rotor structure, the peak torque of the drive motor is significantly improved, and the peak power and power at the highest speed are improved.

[0024] Other features and advantages of the present disclosure will be set forth in the following description, or some features and advantages may be inferred or unambiguously determined from the description, or may be learned by implementing the above-mentioned technology of the present disclosure.

[0025] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 A schematic diagram of the structure of the rotor provided in an embodiment of the present application;

[0028] Figure 2 A partial structural schematic diagram of a rotor structure provided in an embodiment of the present application;

[0029] Figure 3 A cross-sectional view of a rotor structure provided in an embodiment of the present application;

[0030] Figure 4 A schematic diagram of a portion of the structure of the core assembly of the rotor structure provided in an embodiment of the present application;

[0031] Figure 5 A schematic structural diagram of a first iron core of a rotor structure provided in an embodiment of the present application;

[0032] Figure 6 A schematic structural diagram of a second core of a rotor structure provided in an embodiment of the present application;

[0033] Figure 7 A schematic structural diagram of the third core of the rotor structure provided in an embodiment of the present application.

[0034] Reference numerals

[0035] 100, core assembly; 101, first core; 1011, first bite groove; 1012, first groove; 102, second core; 1021, second bite groove; 1022, fourth bite groove; 1023, second groove; 103, third core; 1031, third bite groove; 104, bite station; 200, first magnetic steel; 300, second magnetic steel; 400, carbon fiber; 500, connection assembly; 501, rotating shaft; 502, baffle; 503, pressure ring. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present application.

[0037] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0038] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0039] In addition, the terms "installed", "set", "provided with", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or a point connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0040] In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise specified, "plurality" means two or more.

[0041] Example

[0042] At present, with the development of new energy vehicles, the requirements for drive motor performance and high speed are also getting higher and higher. In order to improve the performance of the motor, in addition to increasing the amount of magnetic steel and increasing the size of the motor, the rotor topology of the motor can also be optimized, such as reducing the thickness of the magnetic isolation bridge of the rotor core. The thickness and diameter of the magnetic isolation bridge affect the performance of the motor. However, as the motor speed requirements become higher and higher, reducing the thickness of the magnetic isolation bridge will lead to stress concentration at the magnetic isolation bridge and the risk of fracture. Especially for high-speed motors, the strength of the rotor under the action of centrifugal force is increasingly difficult to meet the requirements. For high-speed motors, it is currently generally adopted to keep the original magnetic isolation bridge unchanged and wrap a circle of carbon fiber on the outside of the rotor to ensure that the rotor is not damaged. For the loose rotor that completely cancels the magnetic isolation bridge, it is difficult to wrap carbon fiber because it is not a complete rotor, and it is difficult to achieve mass production. Some rotor structures can realize carbon fiber winding without magnetic isolation bridge after being pressed by some auxiliary positioning tooling, but this structure is only suitable for the structure where the rotor is a section, and the segmented skew pole of the rotor lamination cannot be realized, which will affect the NVH of the motor. The patent proposes a segmented carbon fiber rotor structure without a magnetic bridge, which ensures the strength of the rotor core at high speeds while maximizing the performance of the motor.

[0043] During the design process, the inventor discovered that the existing high-speed rotor structure schemes are: Scheme 1: Wind carbon fiber on the outside of the rotor while keeping the original magnetic isolation bridge unchanged. Scheme 2: Cancel all magnetic isolation bridges, fix the segmented rotor by using the pin holes on the end plate or adding a long screw, and then wind the carbon fiber, but the iron core can only be one section, and cannot be segmented and skewed. Scheme 3: Use high-strength silicon steel sheets, but the space for increasing the speed is limited, and the motor performance cannot be improved.

[0044] In view of this, if Figure 1-Figure 7 As shown, in the first aspect, an embodiment of the present application provides a rotor structure, including: a core assembly 100, wherein the core assembly 100 is configured as a block structure, and the core assembly 100 is provided with a bite station 104 along its thickness direction, and the bite station 104 is configured for glue injection or injection molding for pre-fixing the block structure.

[0045] Exemplarily, the rotor structure includes but is not limited to a segmented rotor without a magnetic isolation bridge. The biting station 104 is designed on the core assembly 100, and then glue injection or injection molding can be performed at the biting station 104. After the glue is cured, the core assembly 100 can be pulled so that the segmented structure forms a whole, which is convenient for subsequent fixation.

[0046] In the above-mentioned implementation process, the core assembly 100 is configured as a block structure. When the bite station 104 of the core assembly 100 is injected with glue or injection molded, the core assembly 100 can be formed into a whole after the glue is cured, which is convenient for the subsequent fixation of the periphery of the core assembly 100. There is no need to add additional parts to fix the block structure of the core assembly 100, and mass production can be achieved.

[0047] like Figure 2-Figure 5 As shown, the core assembly 100 includes a first core 101, and the first core 101 is provided with a first bite groove 1011 along its thickness direction, and a plurality of the first bite grooves 1011 are distributed along the periphery of the first core 101 at intervals, for example, eight first bite grooves 1011 are provided, and the eight first bite grooves 1011 are distributed at equal intervals along the periphery of the first core 101, wherein the number of the first bite grooves 1011 can be set according to the actual size of the first core 101.

[0048] In the above implementation process, the first iron core 101 is configured with a first bite groove 1011. When the first bite groove 1011 is injected with glue or injection molded, the first iron core 101 can be fixed. After the glue is cured, the first iron core 101 can be pulled to form a whole, which is convenient for fixation and can achieve mass production.

[0049] like Figure 6 As shown, the core assembly 100 also includes a second core 102, which is arranged on the outer side of the first core 101, and the second core 102 is provided with a second bite groove 1021 along its thickness direction, the second bite groove 1021 is distributed corresponding to the first bite groove 1011, and the second bite groove 1021 and the first bite groove 1011 are both configured to be open in a direction toward each other.

[0050] Exemplarily, the second bite groove 1021 corresponds one to one with the first bite groove 1011, that is, one second bite groove 1021 corresponds to one first bite groove 1011, and correspondingly, the second core 102 is configured with eight corresponding ones. The first core 101 and the second core 102 are combined to form a dumbbell-shaped structure, so that after the first bite groove 1011 and the second bite groove 1021 are injected with glue or injection molded, the first core 101 and the second core 102 can be pulled together to facilitate the first core 101 and the second core 102 to form a whole.

[0051] In the above-mentioned implementation process, the second iron core 102 is configured with a second bite groove 1021, and the first bite groove 1011 corresponds to the second bite groove 1021, so that after the bite station 104 composed of the first bite groove 1011 and the second bite groove 1021 is injected with glue or injection molded, the glue can pull the first iron core 101 and the second iron core 102 after curing, so that the first iron core 101 and the second iron core 102 form a whole, which ensures the strength of the rotor structure under high speed, maximizes the performance of the drive motor, facilitates fixation, and can achieve mass production.

[0052] like Figure 7 As shown, the core assembly 100 also includes a third core 103, which is arranged on the side of the second core 102 away from the first core 101, and the third core 103 is provided with a third bite groove 1031 along its thickness direction, and the second core 102 is provided with a fourth bite groove 1022 corresponding to the third bite groove 1031 on the side close to the third core 103, and the third bite groove 1031 and the fourth bite groove 1022 are both configured to be open in directions toward each other.

[0053] Exemplarily, the third bite groove 1031 corresponds to the fourth bite groove 1022 one by one, that is, one third bite groove 1031 corresponds to one fourth bite groove 1022, and correspondingly, the third core 103 is configured with eight corresponding ones. The third core 103 and the second core 102 are combined to form a dumbbell-shaped structure, so that after the third bite groove 1031 and the fourth bite groove 1022 are injected with glue or injection molded, the third core 103 and the second core 102 can be pulled together to facilitate the third core 103 and the second core 102 to form a whole.

[0054] In the above-mentioned implementation process, the third core 103 is provided with a third bite groove 1031, and the second core 102 is provided with a fourth bite groove 1022. The third bite groove 1031 corresponds to the fourth bite groove 1022, so that after the bite station 104 composed of the third bite groove 1031 and the fourth bite groove 1022 is injected with glue or injection molded, the glue can pull the second core 102 and the third core 103 after curing, so that the second core 102 and the third core 103 form a whole, which is convenient for fixation and can realize mass production.

[0055] Please refer to Figure 5 A first groove 1012 is arranged on one side of the first core 101 close to the second core 102 , a plurality of first grooves 1012 are spaced apart along the periphery of the first core 101 , and at least one first groove 1012 is arranged between two adjacent first engaging grooves 1011 .

[0056] In the above implementation process, the first iron core 101 is also configured with a first groove 1012, so that when fixing the first iron core 101 and the second iron core 102, not only can glue injection or injection molding be performed inside the first bite groove 1011 and the second bite groove 1021, but glue injection or injection molding can also be performed inside the first groove 1012, which is convenient for fixation and can achieve mass production.

[0057] Please refer to Figure 6 A second groove 1023 is arranged on one side of the second core 102 close to the third core 103 , a plurality of second grooves 1023 are spaced apart along the periphery of the second core 102 , and at least one second groove 1023 is arranged between two adjacent second engaging grooves 1021 .

[0058] In the above implementation process, the second core 102 is also configured with a second groove 1023, so that when fixing the second core 102 and the third core 103, not only can glue injection or injection molding be performed inside the third bite groove 1031 and the fourth bite groove 1022, but also glue injection or injection molding can be performed inside the second groove 1023, which is convenient for fixation and can achieve mass production.

[0059] like Figure 2-Figure 3 As shown, the rotor structure further includes a first magnetic steel 200, and the first magnetic steel 200 connects the first iron core 101 and the second iron core 102; and

[0060] The rotor structure further includes a second magnetic steel 300 , and the second magnetic steel 300 connects the second iron core 102 and the third iron core 103 .

[0061] In some embodiments, the rotor structure further includes carbon fiber 400, and the carbon fiber 400 is disposed on the core assembly 100, wherein the carbon fiber 400 can be wound by wet or dry winding, and the thickness of the carbon fiber 400 is 1 mm to 1.5 mm. While ensuring the strength of the core assembly 100 at high speed, the performance of the drive motor is maximized.

[0062] In some embodiments, the rotor structure further includes a connection assembly 500, and the core assembly 100 is configured with several along its thickness direction, and the connection assembly 500 connects several core assemblies 100. Exemplarily, the connection assembly 500 includes a rotating shaft 501, a rotor baffle 502 and a pressing ring 503, and the number of the core assemblies 100 includes but is not limited to six, and the six core assemblies 100 are assembled forward and reversely and the keyways at two different positions on the rotating shaft 501 are assembled in the order of ABCCBA to form a V-shaped oblique pole assembled on the rotating shaft 501, and then pressed by the rotor baffle 502 and the pressing ring 503 to form the rotor structure.

[0063] In the above implementation process, several core assemblies 100 are stacked through the connecting assembly 500 to form a segmented oblique pole structure. At the same time, the rotor structure is simple and does not require additional parts for fixing. The rotation speed of the drive motor can be increased to ensure the NVH performance of the drive motor.

[0064] In a second aspect, the present application also provides a drive motor, comprising the rotor structure as described above.

[0065] In the above implementation process, the rotor structure is a block oblique pole structure that eliminates the magnetic isolation bridge. This structure is simple and does not require additional parts for fixing. After using this rotor structure, the peak torque of the drive motor is significantly improved (for example, the peak torque of the drive motor is increased by 10%), as well as the peak power (for example, the peak power is increased by 20%) and the power at the highest speed (for example, the power at the highest speed is increased by 30%).

[0066] It should be understood that the "in this embodiment", "in the embodiment of the present application" or "as an optional implementation" mentioned throughout the specification means that the specific features, structures or characteristics related to the embodiment are included in at least one embodiment of the present application. Therefore, "in this embodiment", "in the embodiment of the present application" or "as an optional implementation" appearing throughout the specification does not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner. Those skilled in the art should also be aware that the embodiments described in the specification are all optional embodiments, and the actions and modules involved are not necessarily required for the present application.

[0067] In the various embodiments of the present application, it should be understood that the size of the serial numbers of the above-mentioned processes does not necessarily mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0068] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A rotor structure, characterized in that: include: The core assembly is configured as a block structure, and the core assembly is provided with a bite station along its thickness direction, and the bite station is configured for glue injection or injection molding to pre-fix the block structure.

2. The rotor structure according to claim 1, characterized in that: The core assembly includes a first core, the first core is provided with first bite grooves along the thickness direction thereof, and a plurality of first bite grooves are distributed at intervals along the periphery of the first core.

3. The rotor structure according to claim 2, characterized in that: The core assembly also includes a second core, which is arranged on the outside of the first core. The second core is provided with a second bite groove along its thickness direction. The second bite groove is distributed corresponding to the first bite groove, and the second bite groove and the first bite groove are both configured to be open in a direction toward each other.

4. The rotor structure according to claim 3, characterized in that: The core assembly also includes a third core, which is arranged on the side of the second core away from the first core, and the third core is provided with a third bite groove along its thickness direction, and the second core is provided with a fourth bite groove corresponding to the third bite groove on the side close to the third core, and the third bite groove and the fourth bite groove are both configured to be open in directions toward each other.

5. The rotor structure according to claim 3, characterized in that: A first groove is disposed on one side of the first core close to the second core. A plurality of first grooves are distributed at intervals along the periphery of the first core, and at least one first groove is disposed between two adjacent first engaging grooves.

6. The rotor structure according to claim 4, characterized in that: A second groove is disposed on one side of the second core close to the third core. A plurality of second grooves are distributed at intervals along the periphery of the second core, and at least one second groove is disposed between two adjacent second engaging grooves.

7. The rotor structure according to claim 4, characterized in that: The rotor structure further includes a first magnetic steel, wherein the first magnetic steel connects the first iron core and the second iron core; and The rotor structure further includes a second magnetic steel, and the second magnetic steel connects the second iron core and the third iron core.

8. The rotor structure according to claim 1 or 6, characterized in that: The rotor structure further includes carbon fibers, and the carbon fibers are disposed on the core assembly.

9. The rotor structure according to claim 1, characterized in that: The rotor structure further includes a connecting assembly, and the core assembly is provided with a plurality of the core assemblies along its thickness direction, and the connecting assembly connects the plurality of the core assemblies.

10. A driving motor, characterized in that: Comprising a rotor structure as described in any one of claims 1-9.

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