Driving motor, driving system and vehicle
By designing offset-conducting rotor oil holes and end cover oil holes, the problem of blocked oil circuits in the drive motor is solved, achieving better heat dissipation and production adaptability.
Patent Information
- Application Number
- CN202422784177.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-14
- Publication Date
- 2025-10-03
- Estimated Expiration
- 2034-11-14
AI Technical Summary
The existing oil circuit design of the drive motor leads to cooling oil accumulation and poor heat transfer, which affects the heat dissipation effect and is not suitable for large-scale production.
A rotor structure is designed, including a first iron core, a second iron core, and a third iron core. Oil holes are offset and connected in different directions to form a smooth oil path. Combined with the oil hole design of the rotor shaft and the end cover, the cooling oil is ensured to flow smoothly.
It improves the smoothness of the oil circuit, reduces the accumulation of cooling oil, improves the heat dissipation effect, and is suitable for large-scale production.
Smart Images
Figure CN223414665U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of drive motors, and in particular to a drive motor, a drive system and a vehicle. Background Art
[0002] As the core of new energy vehicles, the performance optimization of the drive motor system is an indispensable part of the powertrain design of modern electric vehicles. If the output torque of the drive motor is small, it will affect the acceleration performance of the entire vehicle. If the efficiency of the drive motor is low, it will seriously affect the driving range of the entire vehicle and affect the passengers' riding experience. If the speed is too low, it is impossible to achieve a higher speed. Therefore, higher requirements are placed on the performance of the drive motor system. As the heat dissipation of the drive motor is a factor that affects it, how to achieve the heat dissipation of the drive motor is particularly important. Utility Model Content
[0003] The purpose of the embodiments of the present application is to provide a drive motor, a drive system and a vehicle, which improve the smoothness of the oil circuit and eliminate the accumulation of cooling oil caused by oil circuit obstruction.
[0004] In a first aspect, an embodiment of the present application provides a drive motor, comprising: a rotor structure, the rotor structure comprising a first iron core, a second iron core and a third iron core, the second iron core being located between the first iron core and the third iron core, the first iron core being configured with a first rotor oil hole, the second iron core being configured with a second rotor oil hole, the third iron core being configured with a third rotor oil hole, the second rotor oil hole being offset relative to the first rotor oil hole along a first direction, the third rotor oil hole being offset relative to the first rotor oil hole along a second direction, and the first rotor oil hole, the second rotor oil hole and the third rotor oil hole being connected, and the first direction is opposite to the second direction.
[0005] In the above implementation process, the first iron core is configured with a first rotor oil hole, the second iron core is configured with a second rotor oil hole, and the third iron core is configured with a third rotor oil hole, so that after the first iron core, the second iron core and the third iron core are assembled, the second rotor oil hole and the third rotor oil hole can be relatively offset, and then an oil path is formed by the first rotor oil hole, the second rotor oil hole and the third rotor oil hole, thereby improving the smoothness of the oil path and eliminating the accumulation of cooling oil due to oil path obstruction.
[0006] In some embodiments, the second rotor oil hole is offset by +3° relative to the first rotor oil hole, and the third rotor oil hole is offset by -3° relative to the first rotor oil hole. This ensures a smoother and more orderly oil path in the rotor structure, eliminating oil blockage and resulting in cooling oil accumulation. Furthermore, the rotor structure is easy to assemble and suitable for large-scale production.
[0007] In some embodiments, there are at least two first cores, at least two second cores, and at least two third cores, the first core is located between two second cores, and the second core is located between two third cores.
[0008] In the above implementation process, the first iron core is located in the middle position, and the second iron core and the third iron core are offset in opposite directions relative to the first iron core, so that after the first iron core, the second iron core and the third iron core are assembled, a smooth oil path can be formed, thereby improving the cooling effect and reducing heat transfer.
[0009] In some embodiments, the drive motor further includes a rotor shaft, the rotor shaft passes through the first iron core, the second iron core and the third iron core, and the rotor shaft is provided with a first oil outlet hole and an oil passage, the first oil outlet hole is respectively connected to the oil passage, the first rotor oil hole, the second rotor oil hole and the third rotor oil hole.
[0010] In the above-mentioned implementation process, after the rotor shaft passes through the first iron core, the second iron core and the third iron core, the cooling oil in the oil passage of the rotor shaft enters the oil passage of the rotor structure through the first oil outlet hole, thereby improving the smoothness of the oil passage of the drive motor, eliminating the accumulation of cooling oil caused by the absence of oil passage obstruction, improving the cooling effect, and reducing heat transfer.
[0011] In some embodiments, the first oil outlet is disposed on a side of the rotor shaft close to the third core, fully considering that the oil path of the drive motor is unobstructed and uniform, and the oil path of the drive motor is more orderly without oil path obstruction causing cooling oil accumulation.
[0012] In some embodiments, the drive motor further includes a first end cap, which is sleeved onto the rotor shaft and located on one side of the rotor structure. The first end cap is configured with an oil inlet, which is in communication with the first oil outlet. This facilitates a more organized oil circuit for the drive motor and eliminates cooling oil accumulation caused by oil blockage.
[0013] In some embodiments, the drive motor further includes a second end cap, which is sleeved onto the rotor shaft and located on a side of the rotor structure facing away from the first end cap. The second end cap is provided with a second oil outlet, which communicates with the third rotor oil hole. This facilitates a more organized oil path for the drive motor and eliminates cooling oil accumulation caused by oil path obstruction.
[0014] In some embodiments, the first oil outlet hole, the oil inlet hole, and the second oil outlet hole are each configured in plurality.
[0015] In a second aspect, the present application also provides a drive system, comprising a drive motor as described in any one of the above items.
[0016] Since the driving system provided in the second aspect includes a driving motor, the driving system has all the technical effects of the driving motor and will not be described in detail here.
[0017] In a third aspect, the present application also provides a vehicle comprising the drive system as described above.
[0018] Since the vehicle provided in the third aspect includes a drive system, the vehicle has all the technical effects of the drive system and will not be elaborated here.
[0019] 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 practicing the above-mentioned technology of the present disclosure.
[0020] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. 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 relevant drawings can be obtained based on these drawings without creative work.
[0022] Figure 1 A schematic diagram of the structure of a drive motor provided in an embodiment of the present application;
[0023] Figure 2 A schematic structural diagram of the rotor structure of a drive motor provided in an embodiment of the present application;
[0024] Figure 3 A schematic structural diagram of a first end cover of a drive motor provided in an embodiment of the present application;
[0025] Figure 4 A schematic structural diagram of the second end cover of the drive motor provided in an embodiment of the present application;
[0026] Figure 5 This is a schematic structural diagram of the rotor shaft of the drive motor provided in an embodiment of the present application.
[0027] Reference numerals
[0028] 100. Rotor structure; 101. First iron core; 1011. First rotor oil hole; 102. Second iron core; 1021. Second rotor oil hole; 103. Third iron core; 1031. Third rotor oil hole; 200. Rotor shaft; 201. First oil outlet hole; 202. Oil passage; 300. First end cover; 301. Oil inlet hole; 400. Second end cover; 401. Second oil outlet hole. DETAILED DESCRIPTION
[0029] 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 generally 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 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 are within the scope of protection of this application.
[0030] In this application, terms such as "upper," "lower," "left," "right," "front," "back," "top," "bottom," "inner," "outer," "center," "vertical," "horizontal," "transverse," and "longitudinal" indicate positions or locations based on the positions or locations shown in the accompanying drawings. These terms are primarily intended to better describe this application and its embodiments and are not intended to limit the devices, elements, or components indicated to having a specific orientation, or to being constructed or operated in a specific orientation.
[0031] Furthermore, some of the above terms may be used to express other meanings besides indicating a position or location. For example, the term "on" may also be used to indicate a dependency or connection in certain circumstances. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.
[0032] Furthermore, the terms "installed," "disposed," "provided with," "connected," and "connected" should be interpreted broadly. For example, they can refer to fixed connections, removable connections, or integral structures; mechanical connections or point connections; direct connections, indirect connections through an intermediary, or internal communication between two devices, elements, or components. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.
[0033] Furthermore, the terms "first," "second," etc., are primarily used to distinguish between different devices, elements, or components (which may or may not be of the same type and configuration), and are not intended to indicate or imply the relative importance or quantity of the devices, elements, or components indicated. Unless otherwise specified, "plurality" means two or more.
[0034] Example
[0035] During the design process, the inventors discovered that to improve the heat dissipation efficiency of electric drives and reduce demagnetization of the motor rotor magnets caused by motor overheating, most existing electric drive motor cooling solutions use a rotor oil flow and stator end spray cooling scheme. Because motor rotors generally use a skewed pole structure to reduce the harmonic content of the rotor magnetomotive force, the skewed pole structure causes the oil path in the rotor to bend and have overlapping gaps. This poses the risk of residual cooling oil and oil leakage, which in turn causes abnormal rotor vibration during movement and causes the first-order roar of the electric drive.
[0036] The following design solutions are commonly used in the industry for oil-cooled rotors: 1) Oil is routed through the rotor shaft, bypassing the rotor core. This solution effectively addresses the issue of uneven oil flow, but the cooling oil path is located away from the magnets, limiting cooling effectiveness. 2) A dedicated oil channel is created within the rotor core, but this solution can easily lead to residual oil and rotor dynamic imbalance.
[0037] In addition to the above solutions, it is also possible to achieve the same heat dissipation effect by changing the cooling method of the electric drive. For example, changing the cooling method to water cooling, passing coolant into the electric drive housing to cool the stator, thereby reducing the heat transferred to the rotor. However, the cooling effect of this solution is not as good as that of oil cooling. The insulating water channel in the stator housing also increases the processing difficulty, which affects large-scale production.
[0038] In view of this, if Figure 1-Figure 5 As shown, in the first aspect, an embodiment of the present application provides a drive motor, including: a rotor structure 100, the rotor structure 100 including a first iron core 101, a second iron core 102 and a third iron core 103, the second iron core 102 is located between the first iron core 101 and the third iron core 103, the first iron core 101 is configured with a first rotor oil hole 1011, the second iron core 102 is configured with a second rotor oil hole 1021, and the third iron core 103 is configured with a third rotor oil hole 1031, the second rotor oil hole 1021 is offset relative to the first rotor oil hole 1011 along a first direction, and the third rotor oil hole 1031 is offset relative to the first rotor oil hole 1011 along a second direction, and the first rotor oil hole 1011, the second rotor oil hole 1021 and the third rotor oil hole 1031 are connected, and the first direction is opposite to the second direction.
[0039] Exemplarily, the first rotor oil holes 1011 are distributed at intervals along the circumference of the first iron core 101, the second rotor oil holes 1021 are distributed at intervals along the circumference of the second iron core 102, and the third rotor oil holes 1031 are distributed at intervals along the circumference of the third iron core 103. The shapes of the first rotor oil holes 1011, the second rotor oil holes 1021 and the third rotor oil holes 1031 can be set to be the same. For example, all three are set to be special-shaped holes. The first rotor oil holes 1011, the second rotor oil holes 1021 and the third rotor oil holes 1031 correspond to each other one by one, so that the rotor structure 100 forms a plurality of oil circuits.
[0040] In the above implementation process, the first core 101 is provided with a first rotor oil hole 1011, the second core 102 is provided with a second rotor oil hole 1021, and the third core 103 is provided with a third rotor oil hole 1031. Therefore, after the first core 101, the second core 102, and the third core 103 are assembled, the second rotor oil hole 1021 and the third rotor oil hole 1031 can be relatively offset, thereby forming an oil path by the first rotor oil hole 1011, the second rotor oil hole 1021, and the third rotor oil hole 1031, thereby improving the smoothness of the oil path and eliminating the accumulation of cooling oil due to oil path obstruction.
[0041] like Figure 2 As shown, the second rotor oil hole 1021 is offset by +3° relative to the first rotor oil hole 1011, and the third rotor oil hole 1031 is offset by -3° relative to the first rotor oil hole 1011. This ensures that the oil path of the rotor structure 100 is smoother and neater, without oil path obstruction causing cooling oil accumulation. Furthermore, the rotor structure 100 is easy to assemble and suitable for large-scale production.
[0042] Exemplarily, the first rotor oil hole 1011 located above is offset by 22° relative to the vertical center line of the first iron core 101, the second rotor oil hole 1021 located above is offset by 25° relative to the vertical center line of the second iron core 102, and the third rotor oil hole 1031 located above is offset by 19° relative to the vertical center line of the third iron core 103. The vertical center line of the first iron core 101, the vertical center line of the second iron core 102, and the vertical center line of the third iron core 103 coincide.
[0043] In some embodiments, there are at least two first cores 101, at least two second cores 102, and at least two third cores 103. The first core 101 is located between two second cores 102, and the second core 102 is located between two third cores 103.
[0044] In the above implementation process, the first iron core 101 is located in the middle position, and the second iron core 102 and the third iron core 103 are offset in opposite directions relative to the first iron core 101, so that after the first iron core 101, the second iron core 102 and the third iron core 103 are assembled, a smooth oil path can be formed to improve the cooling effect and reduce heat transfer.
[0045] like Figure 1 and Figure 5 As shown, the drive motor further includes a rotor shaft 200, which passes through the first iron core 101, the second iron core 102 and the third iron core 103, and the rotor shaft 200 is provided with a first oil outlet hole 201 and an oil passage 202, and the first oil outlet hole 201 is respectively connected to the oil passage 202, the first rotor oil hole 1011, the second rotor oil hole 1021 and the third rotor oil hole 1031.
[0046] During the above implementation process, after the rotor shaft 200 passes through the first iron core 101, the second iron core 102 and the third iron core 103, the cooling oil in the oil passage 202 of the rotor shaft 200 enters the oil passage of the rotor structure 100 through the first oil outlet hole 201, thereby improving the smoothness of the oil passage of the drive motor, eliminating the accumulation of cooling oil caused by oil passage obstruction, improving the cooling effect, and reducing heat transfer.
[0047] In some embodiments, the first oil outlet 201 is disposed on a side of the rotor shaft 200 close to the third core 103. Taking full account of the smooth and uniform oil path of the drive motor, the oil path of the drive motor is more orderly without oil path obstruction causing cooling oil accumulation.
[0048] like Figure 3 As shown, the drive motor further includes a first end cover 300, which includes but is not limited to a front end cover. The first end cover 300 is sleeved on the rotor shaft 200 and is located on one side of the rotor structure 100. The first end cover 300 is configured with an oil inlet 301, which is in communication with the first oil outlet 201. This helps to make the oil path of the drive motor more orderly and eliminates cooling oil accumulation caused by oil path obstruction.
[0049] like Figure 4As shown, the drive motor further includes a second end cover 400, which includes but is not limited to a rear end cover. The second end cover 400 is sleeved on the rotor shaft 200 and is located on the side of the rotor structure 100 facing away from the first end cover 300. The second end cover 400 is configured with a second oil outlet 401, which is in communication with the third rotor oil hole 1031. This helps to make the oil path of the drive motor more orderly and eliminates cooling oil accumulation caused by oil path obstruction.
[0050] In some embodiments, the first oil outlet hole 201 , the oil inlet hole 301 , and the second oil outlet hole 401 are each configured in plurality.
[0051] In a second aspect, the present application also provides a drive system, comprising the drive motor as described above.
[0052] Since the driving system provided in the second aspect includes a driving motor, the driving system has all the technical effects of the driving motor and will not be described in detail here.
[0053] In a third aspect, the present application further provides a vehicle comprising the drive system described above. The vehicle may be a fuel vehicle, a gas vehicle, or a new energy vehicle, wherein the new energy vehicle may be a pure electric vehicle, a hybrid vehicle, or an extended-range vehicle.
[0054] Since the vehicle provided in the third aspect includes a drive system, the vehicle has all the technical effects of the drive system and will not be elaborated here.
[0055] In all embodiments of the present application, "big" and "small" are relative, "more" and "less" are relative, and "up" and "down" are relative. The expressions of such relative terms will not be elaborated in the embodiments of the present application.
[0056] It should be understood that the phrases “in this embodiment,” “in an embodiment of the present application,” or “as an optional implementation” mentioned throughout the specification mean that 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 an embodiment of the present application,” or “as an optional implementation” appearing throughout the specification do not necessarily refer to the same embodiment. In addition, these specific features, structures, or characteristics may 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.
[0057] 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 order of execution 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.
[0058] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included within the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.
Claims
1. A drive motor, characterized in that: include: A rotor structure comprising a first iron core, a second iron core, and a third iron core, wherein the second iron core is located between the first iron core and the third iron core, the first iron core is provided with a first rotor oil hole, the second iron core is provided with a second rotor oil hole, and the third iron core is provided with a third rotor oil hole, the second rotor oil hole being offset relative to the first rotor oil hole along a first direction, the third rotor oil hole being offset relative to the first rotor oil hole along a second direction, and the first rotor oil hole, the second rotor oil hole, and the third rotor oil hole being connected, and the first direction is opposite to the second direction.
2. The drive motor according to claim 1, wherein: The second rotor oil hole is offset by +3° relative to the first rotor oil hole, and the third rotor oil hole is offset by -3° relative to the first rotor oil hole.
3. The drive motor according to claim 1, characterized in that: There are at least two first cores, at least two second cores, and at least two third cores. The first core is located between two second cores, and the second core is located between two third cores.
4. The drive motor according to any one of claims 1 to 3, characterized in that: The drive motor also includes a rotor shaft, which passes through the first iron core, the second iron core and the third iron core, and is provided with a first oil outlet hole and an oil passage. The first oil outlet hole is respectively connected to the oil passage, the first rotor oil hole, the second rotor oil hole and the third rotor oil hole.
5. The driving motor according to claim 4, characterized in that: The first oil outlet is arranged on a side of the rotor shaft close to the third core.
6. The driving motor according to claim 5, characterized in that: The drive motor further includes a first end cover, which is sleeved on the rotor shaft. The first end cover is located on one side of the rotor structure and is provided with an oil inlet hole, which is communicated with the first oil outlet hole.
7. The driving motor according to claim 6, characterized in that: The drive motor also includes a second end cover, which is sleeved on the rotor shaft. The second end cover is located on the side of the rotor structure away from the first end cover, and the second end cover is configured with a second oil outlet hole, which is connected to the third rotor oil hole.
8. The driving motor according to claim 7, characterized in that: The first oil outlet hole, the oil inlet hole and the second oil outlet hole are each configured in plurality.
9. A drive system, characterized in that: The drive motor comprises the drive motor according to any one of claims 1 to 8.
10. A vehicle, characterized in that: Comprising the drive system as claimed in claim 9.