Range extender and vehicle

Abstract

The application provides a range extender and a vehicle. The range extender comprises a motor, an engine and a coupling. The motor comprises a first transmission shaft, and the first transmission shaft comprises a first flange part. The engine comprises a second transmission shaft, and the second transmission shaft comprises a second flange part. The coupling comprises a first connecting part, a second connecting part and an elastic part. The first connecting part is detachably connected with the first flange part, the second connecting part is detachably connected with the second flange part, and the elastic part is elastically connected between the first connecting part and the second connecting part. The technical scheme of the application can avoid the breakage of the connection between the engine and the motor due to excessive vibration, and adapt to the development trend of miniaturization and light weight of the range extender.

Description

Technical Field

[0001] This application relates to the field of new energy technology, and in particular to a range extender and vehicle. Background Technology

[0002] A range extender is a combination of an engine and an electric motor. As a component of an electric vehicle, it provides additional electrical energy to increase the vehicle's driving range. With the trend towards miniaturization and lightweight design of range extenders, the space required for their placement in the vehicle compartment needs to be reduced. Currently, the structural design of the connection between the engine and electric motor in range extenders is prone to breakage due to excessive vibration, failing to meet the connection requirements of both the engine and electric motor. Summary of the Invention

[0003] This application provides a range extender and a vehicle that can prevent the connection between the engine and the motor from breaking due to excessive vibration, thus meeting the connection requirements of the engine and the motor.

[0004] In a first aspect, this application provides a range extender, the range extender comprising:

[0005] An electric motor, the electric motor including a first drive shaft, the first drive shaft including a first flange portion;

[0006] An engine, the engine including a second drive shaft, the second drive shaft including a second flange portion; and

[0007] A coupling comprising a first connecting part, a second connecting part, and an elastic part, wherein the first connecting part is detachably connected to a first flange part, the second connecting part is detachably connected to a second flange part, and the elastic part is elastically connected between the first connecting part and the second connecting part.

[0008] It is understandable that by setting a first flange on the first drive shaft and connecting the first flange to the first connecting part of the coupling, the connection area between the first drive shaft and the coupling can be increased while meeting the connection requirements between the first drive shaft and the coupling, making the connection between the first drive shaft and the coupling more stable and robust, and with better reliability.

[0009] By providing a second flange on the second drive shaft and connecting the second flange to the second connecting part of the coupling, the connection area between the second drive shaft and the coupling can be increased while meeting the connection requirements between the second drive shaft and the coupling. This makes the connection between the second drive shaft and the coupling more stable, firm, and reliable.

[0010] By detachably connecting the first flange to the first connecting part, a detachable connection can be achieved between the first drive shaft of the motor and the coupling. Similarly, by detachably connecting the second flange to the second connecting part, a detachable connection can be achieved between the second drive shaft of the engine and the coupling. In other words, by installing the coupling between the second drive shaft of the engine and the first drive shaft of the motor, power transmission between them can be achieved. When the engine outputs power, the second flange of the second drive shaft rotates, causing the second connecting part of the coupling to rotate. The first connecting part of the coupling rotates accordingly under the transmission of the elastic part, further driving the first flange of the first drive shaft to rotate, thereby causing the motor to operate and generate electrical energy.

[0011] Because the coupling has a relatively simple structure, it can reduce the number of components such as flywheels and torsional dampers used in existing technologies while ensuring the reliability of the connection between the engine's second drive shaft and the motor's first drive shaft. This results in a smaller size, lighter weight, more compact structure, and lower cost for the range extender. The reduction in range extender components also improves the overall reliability of the range extender, enabling miniaturization and weight reduction. Furthermore, the elasticity of the coupling's elastic part allows it to absorb the circumferential impact torque from the engine (such as that generated by engine misfire or detonation), reducing the risk of breakage of shafts such as the first and second drive shafts under large impact torques. It also absorbs the axial torque caused by torsional vibration of the engine's second drive shaft, preventing axial movement of the motor's first drive shaft. This eliminates the need for axial clearance in the motor design, further enhancing the compactness of the range extender's structure.

[0012] In summary, by connecting the coupling between the engine's second drive shaft and the motor's first drive shaft, the connection requirements of the engine and motor can be met while effectively preventing the connection point from breaking due to excessive vibration, thus ensuring good reliability.

[0013] In one possible implementation, the first drive shaft further includes a first shaft body, which is fixedly connected to the side of the first flange portion away from the first connecting portion. The first shaft body is coaxially arranged with the first flange portion, and the first flange portion is also sleeved around the periphery of the first connecting portion.

[0014] The range extender also includes a first fastener, which is detachably connected to the first flange and the first connecting part. The first flange is fixed to the first connecting part by the first fastener, and the axial direction of the first fastener is perpendicular to the axial direction of the first shaft.

[0015] It is understandable that by making the first shaft and the first flange coaxial, the central axis of the first shaft and the central axis of the first flange can be collinear and together form the central axis of the first transmission shaft, so that the various parts of the first transmission shaft have good concentricity, which is beneficial to better transmission of torque.

[0016] By fitting the first flange around the first connecting part of the coupling, the first connecting part can be located inside the first flange. Compared to a structure where the first connecting part and the first flange are stacked, this internal and external arrangement of the first connecting part and the first flange reduces the axial dimension required for their connection while still satisfying the required connection area. This reduces the distance between the engine and the motor, thereby decreasing the overall size of the range extender and facilitating its miniaturization.

[0017] The technical solution of detachably connecting the first flange of the first drive shaft and the first connecting part of the coupling through the first fastener can achieve rapid assembly and separation of the first flange of the first drive shaft and the first connecting part of the coupling while meeting the connection requirements of the first flange of the first drive shaft and the first connecting part of the coupling, which is conducive to improving the maintainability of the coupling.

[0018] Furthermore, by setting the axial direction of the first fastener perpendicular to the axial direction of the first shaft, the mounting direction of the first fastener on the first flange portion of the first drive shaft and the first connecting portion of the coupling can be set perpendicular to the axial direction of the first shaft. That is, the mounting direction of the first fastener is perpendicular to the axial direction of the range extender. Since the engine, coupling, and motor are arranged sequentially along the axial direction of the range extender, setting the mounting direction of the first fastener perpendicular to the axial direction of the range extender frees up axial space in the range extender while meeting the connection requirements of the first flange portion of the first drive shaft and the first connecting portion of the coupling. Because no extra axial mounting space needs to be reserved, the axial dimension at the connection between the first flange portion and the first connecting portion can be reduced, thereby reducing the overall size of the range extender. This reduces the interior space occupied by the range extender while increasing the passenger space and improving vehicle ride comfort. Moreover, having a smaller axial dimension at the connection between the coupling and the motor also reduces power transmission losses between the engine and the motor.

[0019] In one possible implementation, the motor further includes a housing, with at least a portion of the first shaft located inside the housing and the first flange located outside the housing.

[0020] It is understandable that, since the first flange of the first drive shaft is located outside the motor housing, the assembly of the first flange of the first drive shaft and the first connection of the coupling can be carried out outside the motor housing. This allows for a larger installation space, making the assembly of the first flange of the first drive shaft and the first connection of the coupling more convenient and faster, without affecting the integrity of the existing internal structure of the motor housing, and the installation process can be relatively reduced.

[0021] In one possible implementation, the first shaft and the first flange are connected to form an integral structure.

[0022] Understandably, the integrated structure results in fewer parts for the first drive shaft. On one hand, this simplifies the manufacturing process of the first drive shaft and improves its production and assembly efficiency. On the other hand, it increases the strength of the first drive shaft, enabling optimization of performance such as NVH (noise, vibration, and harshness) while meeting the trend of miniaturization in range extenders. For example, the first shaft body and the first flange can be integrally molded to form an integrated structure.

[0023] In one possible implementation, the second drive shaft further includes a second shaft body, which is fixedly connected to the side of the second flange portion away from the second connecting portion. The second shaft body and the second flange portion are coaxially arranged, and the second flange portion and the second connecting portion are stacked.

[0024] The range extender also includes a second fastener, which is detachably connected to the second flange and the second connecting part. The second flange is fixed to the second connecting part by the second fastener, and the axial direction of the second fastener is parallel to the axial direction of the second shaft.

[0025] It is understandable that by making the second shaft and the second flange coaxial, the central axis of the second shaft and the central axis of the second flange can be collinear and together form the central axis of the second drive shaft, so that all parts of the second drive shaft have good concentricity, which is beneficial to better transmission of torque.

[0026] In addition, the technical solution of detachably connecting the second flange of the second drive shaft and the second connection of the coupling through the second fastener can achieve rapid assembly and separation of the second flange of the second drive shaft and the second connection of the coupling while meeting the connection requirements of the second flange of the second drive shaft and the second connection of the coupling, which is conducive to improving the maintainability of the coupling.

[0027] In one possible implementation, there are multiple first fasteners, and the multiple first fasteners are spaced apart and connected to the first flange portion and the first connecting portion along the circumferential direction of the first flange portion;

[0028] The number of the second fasteners is multiple, and the multiple second fasteners are spaced apart and connected to the second flange portion and the second connecting portion along the circumferential direction of the second flange portion;

[0029] The projection of any one of the first fasteners along the axial direction of the coupling is offset from the projection of any one of the second fasteners along the axial direction of the coupling.

[0030] It is understandable that by alternately installing multiple first fasteners and multiple second fasteners in the circumferential direction of the coupling, the load on the coupling can be distributed, making the force on the coupling more even. The circumferential direction of the coupling refers to the direction around the central axis of the coupling.

[0031] In one possible implementation, the first drive shaft and the second drive shaft are coaxially arranged.

[0032] It is understandable that when the first drive shaft of the motor is coaxially arranged with the second drive shaft of the engine, the motor can have active vibration damping characteristics. It can apply reverse torque to the second drive shaft of the engine through the first drive shaft of the motor to suppress the vibration of the second drive shaft of the engine, thereby improving the NVH performance of the inverter.

[0033] In one possible implementation, the motor is an axial flux motor.

[0034] It is understandable that axial flux motors have advantages such as small axial dimensions, compact structure, small size, light weight and high torque density. Therefore, by adopting axial flux motors, the overall axial dimensions of the coupling can be further reduced, realizing the miniaturization and weight reduction of the coupling.

[0035] In one possible implementation, the elastic part is an integrally structured elastic diaphragm assembly.

[0036] Understandably, since the elastic portion connecting the first and second connecting parts is an integral elastic diaphragm assembly, the coupling is a diaphragm coupling capable of compensating for the relative displacement of the two connected shafts (the engine's second drive shaft and the motor's first drive shaft) using the elastic deformation of the diaphragm. On one hand, installing a diaphragm coupling between the engine's second drive shaft and the motor's first drive shaft can absorb the circumferential impact torque caused by engine misfire or detonation, reducing the risk of the range extender's shaft system breaking under impact torque. On the other hand, the diaphragm coupling can absorb the axial torque caused by torsional vibration of the engine's second drive shaft, preventing axial movement of the motor's first drive shaft, eliminating the need for axial clearance in the motor's design and making the range extender structure more compact. Furthermore, the diaphragm coupling has high torsional stiffness, which, combined with the motor's active vibration damping characteristics, allows the range extender's NVH performance to be comparable to that of existing range extenders with flywheels. NVH performance refers to noise, vibration, and harshness performance.

[0037] Secondly, this application also provides a vehicle that includes the range extender described above.

[0038] Thirdly, this application also provides an electric motor, the electric motor including a first drive shaft, the first drive shaft including a first shaft body and a first flange portion, the first shaft body being fixedly connected to the first flange portion and coaxially arranged with the first flange portion, the first flange portion being provided with a mounting hole, the opening of the mounting hole being located on the side of the first flange portion opposite to the first shaft body, the mounting hole being used to install a coupling and to accommodate part of the coupling.

[0039] In one possible implementation, the first flange portion is provided with a first thread, the opening of the first threaded hole is located on the outer peripheral surface of the first flange portion, and the first threaded hole communicates with the mounting hole. The extension direction of the first threaded hole is parallel to the radial direction of the first flange portion, and the first threaded hole is used for threaded connection with a first fastener connected to the coupling.

[0040] In one possible implementation, the motor further includes a housing, with at least a portion of the first shaft located inside the housing and the first flange located outside the housing.

[0041] In one possible implementation, the first shaft and the first flange are connected to form an integral structure.

[0042] In one possible implementation, the motor is an axial flux motor. Attached Figure Description

[0043] Figure 1This is a schematic diagram of the vehicle structure provided in an embodiment of this application;

[0044] Figure 2 This is a schematic diagram of the structure of the range extender provided in an embodiment of this application;

[0045] Figure 3 yes Figure 2 The diagram shown is an exploded view of the range extender.

[0046] Figure 4a yes Figure 2 A schematic diagram of the coupling of the range extender at one angle is shown.

[0047] Figure 4b yes Figure 2 A schematic diagram of the coupling of the range extender from another angle;

[0048] Figure 5 It is along Figure 2 A schematic diagram of the cross-section obtained by cutting along section line AA;

[0049] Figure 6 yes Figure 2 A schematic diagram of the structure of the first drive shaft of the motor shown;

[0050] Figure 7 It is along Figure 2 The diagram shows a cross-section obtained by cutting along section line BB. Detailed Implementation

[0051] For ease of understanding, the terminology used in the embodiments of this application will be explained first.

[0052] And / or: This is simply a way of describing the relationship between related objects. It indicates that there can be three kinds of relationships. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone.

[0053] Multiple: refers to two or more.

[0054] Connection: should be interpreted broadly. For example, the connection between A and B can be a direct connection between A and B, or an indirect connection between A and B through an intermediary.

[0055] The specific embodiments of this application will now be clearly described in conjunction with the accompanying drawings.

[0056] Embodiments of this application provide a range extender and a vehicle. The vehicle can be an electric vehicle, a gasoline vehicle, or a hybrid vehicle; for example, the vehicle can be a pure electric vehicle, a range-extended electric vehicle, a hybrid electric vehicle, a fuel cell vehicle, a new energy vehicle, etc., without strict limitation.

[0057] The following explanation will use a range-extended electric vehicle as an example to illustrate the vehicle's structure, but it should be understood that this is not a limitation.

[0058] Please see Figure 1 , Figure 1 This is a schematic diagram of the structure of the vehicle 200 provided in an embodiment of this application.

[0059] Vehicle 200 may include a body 210 and a range extender 100. The range extender 100 is mounted on the body 210. The range extender 100 is an auxiliary power generation unit formed by a mechanical connection between an engine 20 and a generator (hereinafter referred to as motor 10). The range extender 100 can start when the on-board battery is low or depleted, and uses the engine 20 to drive the generator to charge the on-board battery, providing additional electrical power to vehicle 200. Using the range extender 100 to increase the driving range of vehicle 200 helps prevent over-discharge of the on-board battery, thus preventing shortened battery life, ensuring continuous driving of vehicle 200, and reducing the incidence of traffic accidents.

[0060] It should be noted that, Figure 1 The purpose is merely to illustratively describe the connection relationship between the vehicle body 210 and the range extender 100, and is not to specifically limit the connection positions, specific structures, or quantities of the various components. Furthermore, the structures illustrated in the embodiments of this application do not constitute a specific limitation on the vehicle 200. In other embodiments of this application, the vehicle 200 may include... Figure 1 This may involve more or fewer components, or combining certain components, or splitting certain components, or different component arrangements. Figure 1 The components shown can be implemented in hardware, software, or a combination of both.

[0061] Please refer to the following: Figure 2 and Figure 3 , Figure 2 This is a schematic diagram of the structure of the range extender 100 provided in the embodiments of this application. Figure 3 yes Figure 2 The exploded view of the range extender 100 is shown.

[0062] The range extender 100 may include a motor 10, an engine 20, and a coupling 30. The coupling 30 enables the engagement or disengagement of the engine 20 and the motor 10 to control the transmission or interruption of power between them. Specifically, when the coupling 30 is connected between the engine 20 and the motor 10, if the engine 20 is the power source, its power can be transmitted to the motor 10 via the coupling 30. If the motor 10 is the power source, its power can be transmitted to the engine 20 via the coupling 30. When the coupling 30 is disconnected from both the engine 20 and the motor 10, power cannot be transmitted between them.

[0063] It should be noted that, Figure 2 and Figure 3 The purpose is merely to illustratively describe the connection relationship between the motor 10, engine 20, and coupling 30, and is not to specifically limit the connection positions, specific structures, or quantities of each component. Furthermore, the structures illustrated in the embodiments of this application do not constitute a specific limitation on the coupling 30. In other embodiments of this application, the coupling 30 may include components that are larger than... Figure 2 and Figure 3 This may involve more or fewer components, or combining certain components, or splitting certain components, or different component arrangements. Figure 2 and Figure 3 The components shown can be implemented in hardware, software, or a combination of both.

[0064] The following explanation will take engine 20 as the power source, and the power of engine 20 can be transmitted to motor 10 through coupling 30 as an example, but it should be understood that this is not the only one.

[0065] Please refer to the following: Figure 2 , Figure 4a and Figure 4b , Figure 4a yes Figure 2 The diagram shows a structural schematic of the coupling 30 of the range extender 100 at one angle. Figure 4b yes Figure 2 A schematic diagram of the coupling 30 of the range extender 100 from another angle.

[0066] The coupling 30 is located between the motor 10 and the engine 20, and is detachably connected to both the motor 10 and the engine 20. For example, the coupling 30 may be a flexible coupling 30.

[0067] The coupling 30 may include a first connecting portion 31, a second connecting portion 32, and an elastic portion 33. The first connecting portion 31 and the second connecting portion 32 are spaced apart in the axial direction of the coupling 30, wherein the axial direction of the coupling 30 is the direction of its central axis. The elastic portion 33 is located between the first connecting portion 31 and the second connecting portion 32, and is elastically connected between them. That is, the first connecting portion 31, the elastic portion 33, and the second connecting portion 32 are connected sequentially. Each of the first connecting portion 31, the second connecting portion 32, and the elastic portion 33 can be replaced individually.

[0068] It is understandable that by adopting a three-section structure of the coupling 30, consisting of a first connecting part 31, an elastic part 33, and a second connecting part 32, the coupling 30 can be made simple in structure, easy to install and disassemble, and can effectively transmit power between the engine 20 and the motor 10, and compensate for the relative displacement between the second drive shaft 21 of the engine 20 and the first drive shaft 11 of the motor 10, thus ensuring the stable operation of the engine 20 and the motor 10.

[0069] Specifically, the first connecting portion 31 can be approximately disc-shaped. The first connecting portion 31 is rotatable about its central axis. The first connecting portion 31 can be detachably connected to the first drive shaft 11 of the motor 10 to achieve a detachable connection between the coupling 30 and the motor 10. When the first connecting portion 31 rotates about its central axis, it can drive the first drive shaft 11 of the motor 10 to rotate synchronously about its central axis.

[0070] The first connecting part 31 can be detachably connected to the first drive shaft 11 of the motor 10 by means of snap-fit, bolt connection, or other methods. In some other embodiments, the first connecting part 31 can also be fixedly connected to the first drive shaft 11 of the motor 10 by means of welding, bonding, or other methods, and there is no strict limitation on this.

[0071] The second connecting portion 32 can be approximately disc-shaped. The second connecting portion 32 is rotatable about its central axis. The second connecting portion 32 can be detachably connected to the second drive shaft 21 of the engine 20 to achieve a detachable connection between the coupling 30 and the engine 20. When the second connecting portion 32 rotates about its central axis, it drives the second drive shaft 21 of the engine 20 to rotate synchronously about its central axis.

[0072] The second connecting part 32 can be detachably connected to the second drive shaft 21 of the engine 20 by means of snap-fit, bolt connection, or other methods. In some other embodiments, the second connecting part 32 can also be fixedly connected to the second drive shaft 21 of the engine 20 by means of welding, bonding, or other methods, and there is no strict limitation on this.

[0073] The elastic part 33 can transmit torque between the first connecting part 31 and the second connecting part 32, and can absorb vibration and compensate for the relative displacement between the first drive shaft 11 connected to the first connecting part 31 and the second drive shaft 21 connected to the second connecting part 32. The relative displacement between the first drive shaft 11 and the second drive shaft 21 includes one or more of axial displacement, radial displacement and angular displacement.

[0074] In one possible implementation, the elastic part 33 can be an integrally formed elastic diaphragm assembly. That is, the coupling 30 can be a diaphragm coupling 30.

[0075] For example, an elastic diaphragm assembly may include one or more elastic diaphragms. Through the elastic deformation of one or more elastic diaphragms, a certain degree of axial, radial, and angular misalignment can be allowed while transmitting torque.

[0076] Understandably, since the elastic portion 33 connecting the first connecting portion 31 and the second connecting portion 32 is an integral elastic diaphragm assembly, the coupling 30 is a diaphragm coupling 30 capable of compensating for the relative displacement of the two connected shafts (the second drive shaft 21 of the engine 20 and the first drive shaft 11 of the motor 10) by utilizing the elastic deformation of the diaphragm. On one hand, by providing the diaphragm coupling 30 between the second drive shaft 21 of the engine 20 and the first drive shaft 11 of the motor 10, the circumferential impact torque caused by misfire or deflagration of the engine 20 can be absorbed, reducing the risk of the range extender 100 shaft system breaking under impact torque. On the other hand, the diaphragm coupling 30 can absorb the axial torque caused by torsional vibration of the second drive shaft 21 of the engine 20, preventing axial movement of the first drive shaft 11 of the motor 10, so that the motor 10 does not need to reserve axial clearance in the design, making the structure of the range extender 100 more compact. On the other hand, the diaphragm coupling 30 has high torsional stiffness, which, combined with the active vibration damping characteristics of the motor 10, enables the range extender 100 to achieve NVH performance comparable to that of existing range extenders 100 with flywheels. NVH performance refers to noise, vibration, and harshness characteristics.

[0077] In the embodiments of this application, by installing the coupling 30 between the second drive shaft 21 of the engine 20 and the first drive shaft 11 of the motor 10, power transmission between the second drive shaft 21 of the engine 20 and the first drive shaft 11 of the motor 10 can be realized. When the engine 20 outputs power, the second flange portion 211 of the second drive shaft 21 rotates, driving the second connecting portion 32 of the coupling 30 to rotate. The first connecting portion 31 of the coupling 30 rotates accordingly under the transmission of the elastic portion 33, thereby driving the first flange portion 111 of the first drive shaft 11 to rotate, thus causing the motor 10 to work and generate electrical energy. That is, the second connecting portion 32 can serve as the driving shaft end in the coupling 30, and the first connecting portion 31 can serve as the driven shaft end in the coupling 30. When the second connecting portion 32 is driven to rotate by the second drive shaft 21 of the generator 10, the first connecting portion 31 can rotate synchronously under the transmission action of the elastic portion 33, and drive the first drive shaft 11 of the motor 10 to rotate as well.

[0078] Because the coupling 30 has a relatively simple structure, it can reduce the number of components such as flywheels and torsional dampers used in existing technologies while ensuring the reliability of the connection between the second drive shaft 21 of the engine 20 and the first drive shaft 11 of the motor 10. This results in a smaller size, lighter weight, more compact structure, and lower cost for the range extender 100. The reduction in the number of components in the range extender 100 also improves the overall reliability of the range extender 100, achieving miniaturization and weight reduction. Furthermore, because the elastic part 33 of the coupling 30 is elastic, it can absorb the circumferential impact torque from the engine 20 (such as large impact torque generated due to engine misfire or detonation), reducing the risk of shaft breakage of the range extender 100, such as the first drive shaft 11 and the second drive shaft 21, under large impact torque. It can also absorb the axial torque caused by the torsional vibration of the second drive shaft 21 of the engine 20, and prevent the first drive shaft 11 of the motor 10 from being affected and causing axial movement, so that the motor 10 does not need to reserve axial clearance in the design, and further make the structure of the range extender 100 more compact.

[0079] In summary, by connecting the coupling 30 between the second drive shaft 21 of the engine 20 and the first drive shaft 11 of the motor 10, the connection requirements of the engine 20 and the motor 10 can be met, while effectively preventing the connection point of the engine 20 and the motor 10 from breaking due to excessive vibration, thus achieving better reliability.

[0080] Please refer to the following: Figure 2 , Figure 3 and Figure 5 , Figure 5 It is along Figure 2 The diagram shows a cross-section obtained by cutting along section line AA.

[0081] In the embodiments of this application, the motor 10 can be an axial flux motor. It is understood that axial flux motors have advantages such as small axial dimensions, compact structure, small size, light weight and high torque density. Therefore, by using an axial flux motor, the overall axial dimension of the coupling 30 can be further reduced, thereby achieving miniaturization and weight reduction of the coupling 30.

[0082] The motor 10 may include a first drive shaft 11. The first drive shaft 11 is rotatable about its central axis. The first drive shaft 11 may include a first flange portion 111. The first flange portion 111 may be generally disc-shaped and rotatable about its central axis. The first flange portion 111 can be detachably connected to a first connecting portion 31 of a coupling 30 to achieve a detachable connection between the motor 10 and the coupling 30. When the first connecting portion 31 of the coupling 30 rotates about its central axis, it can drive the first flange portion 111 to rotate synchronously about its central axis.

[0083] It is understandable that by providing a first flange 111 on the first drive shaft 11 and connecting the first flange 111 to the first connecting part 31 of the coupling 30, the connection area between the first drive shaft 11 and the coupling 30 can be increased while meeting the connection requirements between the first drive shaft 11 and the coupling 30. This makes the connection between the first drive shaft 11 and the coupling 30 more stable and robust, with better reliability.

[0084] The first flange portion 111 may be coaxially arranged with the first connecting portion 31 of the coupling 30. Here, the coaxial arrangement of the first flange portion 111 and the first connecting portion 31 of the coupling 30 means that the central axis of the first flange portion 111 coincides with the central axis of the first connecting portion 31, or that the distance difference between the central axis of the first flange portion 111 and the central axis of the first connecting portion 31 is within an allowable error range.

[0085] It is understandable that by making the first flange 111 coaxial with the first connecting part 31 of the coupling 30, the first drive shaft 11 and the coupling 30 can have better concentricity, which helps to ensure the accuracy of the assembly between the coupling 30 and the first drive shaft 11, reduces the assembly difficulty of the first flange 111 and the first connecting part 31 of the coupling 30, improves the assembly efficiency of the range extender 100, and saves the production cost and time of the range extender 100.

[0086] Please refer to the following: Figure 2 , Figure 5 and Figure 6 , Figure 6 yes Figure 2 The diagram shows the structure of the first drive shaft 11 of the motor 10.

[0087] In embodiments of this application, the first drive shaft 11 may further include a first shaft body 112, which is fixedly connected to the first flange portion 111 and located on the side of the first flange portion 111 opposite to the first connecting portion 31 of the coupling 30. The extending direction of the first shaft body 112 may be parallel to the axial direction of the first drive shaft 11, wherein the axial direction of the first drive shaft 11 is the direction of the central axis of the first drive shaft 11. The first shaft body 112 may rotate around the central axis of the first shaft body 112. When the first flange portion 111 rotates around the central axis of the first flange portion 111, it can drive the first shaft body 112 to rotate along the central axis of the first shaft body 112. Exemplarily, the first drive shaft 11 formed by connecting the first shaft body 112 and the first flange portion 111 may have a T-shaped cross-sectional width along the axial direction of the first drive shaft 11.

[0088] The first shaft 112 and the first flange 111 can be coaxially arranged. Coaxial arrangement of the first shaft 112 and the first flange 111 means that the central axis of the first shaft 112 coincides with the central axis of the first flange 111, or that the distance difference between the central axis of the first shaft 112 and the central axis of the first flange 111 is within an allowable error range.

[0089] It is understandable that by making the first shaft 112 and the first flange 111 coaxial, the central axis of the first shaft 112 and the central axis of the first flange 111 can be collinear and together form the central axis of the first transmission shaft 11, thereby giving each part of the first transmission shaft 11 better concentricity, which is beneficial for better torque transmission.

[0090] In the embodiments of this application, the first drive shaft 11 can be a one-piece structure. That is, the first shaft body 112 and the first flange portion 111 can be connected to form a one-piece structure. It is understood that the one-piece structure results in fewer parts for the first drive shaft 11. On the one hand, this simplifies the manufacturing process of the first drive shaft 11 and improves the production and assembly efficiency of the first drive shaft 11. On the other hand, it increases the strength of the first drive shaft 11, and optimizes aspects such as NVH performance while meeting the trend of miniaturization of the range extender 100. Exemplarily, the first shaft body 112 and the first flange portion 111 can be connected by integral molding to form a one-piece structure.

[0091] Alternatively, the first drive shaft 11 can also be a split structure. That is, the first shaft body 112 can be assembled with the first flange portion 111 to form the first drive shaft 11. It is understood that when the first drive shaft 11 is a split structure, the first drive shaft 11 can be formed by assembling the first shaft body 112 and the first flange portion 111. This simplifies the first drive shaft 11 by assembling the first shaft body 112 and the first flange portion 111, avoids the problem of reduced strength due to excessive extension length of the same structural component, and facilitates positioning and assembly.

[0092] Please refer to the following: Figure 2 , Figure 3 and Figure 5 The first flange portion 111 can be sleeved around the periphery of the first connecting portion 31 of the coupling 30 and surround at least a portion of the first connecting portion 31. That is, at least a portion of the first connecting portion 31 of the coupling 30 can be located inside the first flange portion 111. The first connecting portion 31 and the first flange portion 111 are disposed inside and outside each other. Specifically, the first flange portion 111 can be provided with a mounting hole 113. The opening of the mounting hole 113 can be located on the surface of the first flange portion 111 facing the coupling 30. The mounting hole 113 can be recessed from the surface of the first flange portion 111 facing the coupling 30 toward the interior of the first flange portion 111. The mounting hole 113 can be used to install the first connecting portion 31 of the coupling 30 and accommodate at least a portion of the first connecting portion 31 of the coupling 30. In some other embodiments, the first flange portion 111 can also be stacked with the first connecting portion 31 of the coupling 30 in the axial direction of the coupling 30, which is not strictly limited.

[0093] It is understandable that by fitting the first flange portion 111 around the periphery of the first connecting portion 31 of the coupling 30, the first connecting portion 31 can be located inside the first flange portion 111. Compared to a structure where the first connecting portion 31 and the first flange portion 111 are stacked, this structure, while satisfying the connection area between the first connecting portion 31 and the first flange portion 111, reduces the axial dimension required for the connection between them, decreases the distance between the engine 20 and the motor 10, and thus reduces the overall size of the range extender 100, which is beneficial for miniaturizing the range extender 100.

[0094] The motor 10 may further include a housing 13. The housing 13 has a receiving space W, which can be used to accommodate components of the motor 10 such as the stator 15, rotor 14, bearing 16, and first drive shaft 11. The housing 13 is rotatably connected to the first drive shaft 11. That is, the first drive shaft 11 is mounted on the housing 13 and is rotatable relative to the housing 13. At least a portion of the first shaft body 112 of the first drive shaft 11 is located inside the housing 13, i.e., within the receiving space W of the housing 13. The first flange portion 111 of the first drive shaft 11 is located outside the housing 13. Exemplarily, the first flange portion 111 of the first drive shaft 11 is located outside the housing 13, and the first shaft body 112 of the first drive shaft 11 is located both inside and outside the housing 13.

[0095] It is understandable that, since the first flange portion 111 of the first drive shaft 11 is located outside the housing 13 of the motor 10, the assembly of the first flange portion 111 of the first drive shaft 11 and the first connecting portion 31 of the coupling 30 can be performed outside the housing 13 of the motor 10. This allows for a larger installation space, making the assembly of the first flange portion 111 of the first drive shaft 11 and the first connecting portion 31 of the coupling 30 more convenient and faster, without affecting the integrity of the existing internal structure of the housing 13 of the motor 10, and the installation process can be relatively reduced.

[0096] The motor 10 may further include a rotor 14 and a stator 15. The rotor 14 may be sleeved on the first shaft body 112 of the first drive shaft 11 and installed inside the housing 13 of the motor 10. The rotor 14 is rotatable relative to the housing 13 of the motor 10. The stator 15 may be sleeved on the first shaft body 112 of the first drive shaft 11 and installed inside the housing 13 of the motor 10. The rotor 14 and stator 15 may be arranged sequentially in the axial direction of the motor 10. The radial dimension of the rotor 14 may be smaller than the radial dimension of the stator 15. When the second drive shaft 21 of the engine 20 drives the stator 15 of the motor 10 to rotate through the first drive shaft 11 of the motor 10, the rotor 14 of the motor 10 will rotate relative to the stator 15 of the motor 10, thereby generating electrical energy that can be used by the vehicle 200.

[0097] The motor 10 may also include a bearing 16. The bearing 16 can be mounted on the first shaft body 112 of the first drive shaft 11. The bearing 16 can control the radial runout of the first drive shaft 11, and can also withstand a certain amount of axial movement, reducing friction during the movement of the first drive shaft 11 and ensuring its rotational accuracy. Exemplarily, the number of bearings 16 can be two. The two bearings 16 can be spaced apart and sleeved on the first shaft body 112 of the first drive shaft 11. Of the two bearings 16, one bearing 16 can be located between the rotor 14 and the first shaft body 112 of the first drive shaft 11. The other bearing 16 can be located between the stator 15 and the first shaft body 112 of the first drive shaft 11. In some other embodiments, the number of bearings 16 can be one or more than two, and this is not strictly limited.

[0098] Please refer to the following: Figure 2 , Figure 3 and Figure 5 In embodiments of this application, the range extender 100 may further include a first fastener 40. The first fastener 40 is detachably connected to the first flange portion 111 of the first drive shaft 11 and the first connecting portion 31 of the coupling 30 to fix the first flange portion 111 of the first drive shaft 11 to the first connecting portion 31 of the coupling 30. That is, the first flange portion 111 of the first drive shaft 11 can be fixed to the first connecting portion 31 of the coupling 30 by the first fastener 40.

[0099] It is understandable that the technical solution of detachably connecting the first flange portion 111 of the first drive shaft 11 and the first connecting portion 31 of the coupling 30 through the first fastener 40 can achieve rapid assembly and separation of the first flange portion 111 of the first drive shaft 11 and the first connecting portion 31 of the coupling 30 while meeting the connection requirements of the first flange portion 111 of the first drive shaft 11 and the first connecting portion 31 of the coupling 30, which is beneficial to improving the maintainability of the coupling 30.

[0100] The axial direction of the first fastener 40 can be perpendicular to the axial direction of the first shaft 112. That is, the first fastener 40 is installed on the first flange 111 and the first connecting portion 31 along the radial direction of the first flange 111 and the first connecting portion 31. The installation direction of the first fastener 40 can be perpendicular to the axial direction of the first shaft 112. The first fastener 40 can be radially installed on the first flange 111 of the first drive shaft 11 and the first connecting portion 31 of the coupling 30. The axial direction of the first fastener 40 is the direction of its central axis. The axial direction of the first shaft 112 can be the direction of its central axis. The radial direction of the first flange 111 can be perpendicular to its central axis. The radial direction of the first connecting portion 31 can be perpendicular to its central axis.

[0101] The number of first fasteners 40 can be one or more. When there are multiple first fasteners 40, they are spaced apart and connected to the first flange portion 111 and the first connecting portion 31 along the circumferential direction of the first flange portion 111, wherein the circumferential direction of the first flange portion 111 is the direction surrounding the central axis of the first flange portion 111. The structures of the multiple first fasteners 40 can be similar, identical, or different. Each first fastener 40 can be used to connect the first flange portion 111 of the first drive shaft 11 and the first connecting portion 31 of the coupling 30. The embodiments of this application do not impose strict limitations on the characteristic parameters of the first fasteners 40, such as their shape, number, size, and placement.

[0102] It is understandable that by aligning the axial direction of the first fastener 40 perpendicular to the axial direction of the first shaft 112, the mounting direction of the first fastener 40 on the first flange portion 111 of the first drive shaft 11 and the first connecting portion 31 of the coupling 30 is perpendicular to the axial direction of the first shaft 112. That is, the mounting direction of the first fastener 40 is perpendicular to the axial direction of the range extender 100. Since the engine 20, coupling 30, and motor 10 are arranged sequentially along the axial direction of the range extender 100, aligning the mounting direction of the first fastener 40 perpendicular to the axial direction of the range extender 100 allows for the freeing up of axial space in the range extender 100 while still meeting the connection requirements of the first flange portion 111 of the first drive shaft 11 and the first connecting portion 31 of the coupling 30. Since no extra axial installation space is required, the axial dimension of the connection between the first flange portion 111 and the first connecting portion 31 can be reduced, thereby reducing the overall size of the range extender 100. This reduces the interior space occupied by the range extender 100 while increasing the passenger space and improving the ride comfort of the vehicle 200. Furthermore, having a smaller axial dimension at the connection between the coupling 30 and the motor 10 also reduces power transmission losses between the engine 20 and the motor 10.

[0103] Of course, in some other embodiments, the installation direction of the first fastener 40 may also be parallel to the axial direction of the first shaft 112, and there is no strict limitation on this.

[0104] In one possible implementation, please refer to [the relevant documentation]. Figure 3 , Figure 4a and Figure 5 The first fastener 40 can be a bolt.

[0105] The first flange portion 111 may be provided with a first threaded hole 114. The opening of the first threaded hole 114 may be located on the outer peripheral surface of the first flange portion 111, wherein the outer peripheral surface of the first flange portion 111 is a surface surrounding the central axis of the first flange portion 111. The first threaded hole 114 may be recessed from the outer peripheral surface of the first flange portion 111 into the interior of the first flange portion 111 and communicate with the mounting hole 113. The extending direction of the first threaded hole 114 may be parallel to the radial direction of the first flange portion 111. That is, the extending direction of the first threaded hole 114 may be perpendicular to the axial direction of the first flange portion 111. The first threaded hole 114 can be used for threaded connection with a first fastener 40.

[0106] The first connecting portion 31 may be provided with a second threaded hole 311. The opening of the second threaded hole 311 may be located on the outer peripheral surface of the first connecting portion 31, wherein the outer peripheral surface of the first connecting portion 31 is a surface surrounding the central axis of the first connecting portion 31. The second threaded hole 311 may be recessed into the interior of the first connecting portion 31 from its outer peripheral surface. The extending direction of the second threaded hole 311 may be parallel to the radial direction of the first connecting portion 31. That is, the extending direction of the second threaded hole 311 may be perpendicular to the axial direction of the first connecting portion 31. The second threaded hole 311 can be used for threaded connection with the first fastener 40.

[0107] When the first flange portion 111 is fitted around the first connecting portion 31, the second threaded hole 311 and the first threaded hole 114 can be sequentially arranged and connected along the radial direction of the first connecting portion 31, and the first fastener 40 can be installed in the second threaded hole 311 and the first threaded hole 114 to fix the first connecting portion 31 to the first flange portion 111.

[0108] For example, the number of second threaded holes 311 can be six. The six second threaded holes 311 can be spaced apart along the circumferential direction of the first connecting portion 31. The circumferential direction of the first connecting portion 31 is the direction surrounding its central axis. The number of first threaded holes 114 can be six, and the six first threaded holes 114 can be spaced apart along the circumferential direction of the first flange portion 111. The number of first fasteners 40 can be six. Six first fasteners are spaced apart on the first flange portion 111 of the first drive shaft 11 and the first connecting portion 31 of the coupling 30. Each first fastener 40 is installed in one second threaded hole 311 and one first threaded hole 114.

[0109] Please refer to the following: Figure 2 , Figure 3 and Figure 5 In embodiments of this application, the engine 20 may include a second drive shaft 21. The second drive shaft 21 is rotatable about its central axis. The second drive shaft 21 may include a second flange portion 211, which may be stacked with the second connecting portion 32 of the coupling 30. The second flange portion 211 may be generally disc-shaped and rotatable about its central axis. The second flange portion 211 can be detachably connected to the second connecting portion 32 of the coupling 30 to achieve a detachable connection between the engine 20 and the coupling 30. When the second flange portion 211 rotates about its central axis, it can drive the second connecting portion 32 of the coupling 30 to rotate synchronously about its central axis.

[0110] It is understandable that by providing a second flange 211 on the second drive shaft 21 and connecting the second flange 211 to the second connecting part 32 of the coupling 30, the connection area between the second drive shaft 21 and the coupling 30 can be increased while meeting the connection requirements between the second drive shaft 21 and the coupling 30. This makes the connection between the second drive shaft 21 and the coupling 30 more stable and robust, with better reliability.

[0111] The second flange portion 211 can be coaxially arranged with the second connecting portion 32 of the coupling 30. Coaxial arrangement of the second flange portion 211 and the second connecting portion 32 of the coupling 30 means that the central axis of the second flange portion 211 coincides with the central axis of the second connecting portion 32, or that the distance difference between the central axis of the second flange portion 211 and the central axis of the second connecting portion 32 is within an acceptable error range.

[0112] It is understandable that by making the second flange 211 coaxial with the second connecting part 32 of the coupling 30, the second drive shaft 21 and the coupling 30 can have better concentricity, which helps to ensure the accuracy of the assembly between the coupling 30 and the second drive shaft 21, reduces the assembly difficulty of the second flange 211 and the first connecting part 31 of the coupling 30, improves the assembly efficiency of the range extender 100, and saves the production cost and time of the range extender 100.

[0113] The second drive shaft 21 may further include a second shaft body 212, which is fixedly connected to the second flange portion 211 and located on the side of the second flange portion 211 opposite to the first connecting portion 31 of the coupling 30. The extending direction of the second shaft body 212 may be parallel to the axial direction of the second drive shaft 21, wherein the axial direction of the second drive shaft 21 is the direction of its central axis. The second shaft body 212 can rotate around its central axis. When the second shaft body 212 rotates along its central axis, it can drive the second flange portion 211 to rotate around its central axis.

[0114] The second shaft 212 and the second flange 211 can be coaxially arranged. Coaxial arrangement of the second shaft 212 and the second flange 211 means that the central axis of the second shaft 212 coincides with the central axis of the second flange 211, or that the distance difference between the central axis of the second shaft 212 and the central axis of the second flange 211 is within an allowable error range.

[0115] It is understandable that by making the second shaft 212 and the second flange 211 coaxial, the central axis of the second shaft 212 and the central axis of the second flange 211 can be collinear and together form the central axis of the second transmission shaft 21, thereby giving each part of the second transmission shaft 21 better concentricity, which is beneficial for better torque transmission.

[0116] In the embodiments of this application, the second drive shaft 21 can be a one-piece structure. That is, the second shaft body 212 and the second flange portion 211 can be connected to form a one-piece structure. It is understood that the second drive shaft 21 formed by the one-piece structure has fewer parts. On the one hand, this helps to simplify the manufacturing process of the second drive shaft 21 and improve the production and assembly efficiency of the second drive shaft 21. On the other hand, it can increase the strength of the second drive shaft 21 and achieve optimization such as NVH performance while meeting the trend of miniaturization of the range extender 100. Exemplarily, the second shaft body 212 and the second flange portion 211 can be connected by integral molding to form a one-piece structure.

[0117] Alternatively, the second drive shaft 21 can also be a split structure. That is, the second shaft body 212 can be assembled with the second flange portion 211 to form the second drive shaft 21. It is understood that when the second drive shaft 21 is a split structure, the second drive shaft 21 can be formed by assembling the second shaft body 212 and the second flange portion 211. This simplifies the second drive shaft 21 by assembling the second shaft body 212 and the second flange portion 211, avoids the problem of reduced strength due to excessive extension length of the same structural component, and facilitates positioning and assembly.

[0118] Please refer to the following: Figure 2 , Figure 3 and Figure 5 In embodiments of this application, the range extender 100 may further include a second fastener 50. The second fastener 50 is detachably connected to the second flange portion 211 of the second drive shaft 21 and the second connecting portion 32 of the coupling 30 to fix the second flange portion 211 of the second drive shaft 21 to the second connecting portion 32 of the coupling 30. That is, the second flange portion 211 of the second drive shaft 21 can be fixed to the second connecting portion 32 of the coupling 30 by the second fastener 50.

[0119] It is understandable that the technical solution of detachably connecting the second flange portion 211 of the second drive shaft 21 and the second connecting portion 32 of the coupling 30 through the second fastener 50 can achieve rapid assembly and separation of the second flange portion 211 of the second drive shaft 21 and the second connecting portion 32 of the coupling 30 while meeting the connection requirements of the second flange portion 211 of the second drive shaft 21 and the second connecting portion 32 of the coupling 30, which is beneficial to improving the maintainability of the coupling 30.

[0120] The axial direction of the second fastener 50 can be parallel to the axial direction of the second shaft 212. That is, the second fastener 50 is installed on the second flange 211 and the second connecting portion 32 along the axial direction of the second flange 211 and along the axial direction of the second connecting portion 32. The installation direction of the second fastener 50 can be parallel to the axial direction of the second shaft 212. The second fastener 50 can be axially installed on the second flange 211 of the second drive shaft 21 and the second connecting portion 32 of the coupling 30. The axial direction of the second fastener 50 is the direction of its central axis. The axial direction of the second shaft 212 can be the direction of its central axis. The axial direction of the second flange 211 can be the direction of its central axis. The axial direction of the second connecting portion 32 can be the direction of its central axis.

[0121] The number of second fasteners 50 can be one or more. When there are multiple second fasteners 50, they are spaced apart and connected to the second flange portion 211 and the second connecting portion 32 along the circumferential direction of the second flange portion 211, wherein the circumferential direction of the second flange portion 211 is the direction surrounding the central axis of the second flange portion 211. The structures of the multiple second fasteners 50 can be similar, identical, or different. Each second fastener 50 can be used to connect the second flange portion 211 of the second drive shaft 21 and the second connecting portion 32 of the coupling 30. The embodiments of this application do not impose strict limitations on the characteristic parameters of the second fasteners 50, such as shape, number, size, and placement.

[0122] Of course, in some other embodiments, the installation direction of the second fastener 50 may also be perpendicular to the axial direction of the second shaft 212, and there is no strict limitation on this.

[0123] In one possible implementation, please refer to [the relevant documentation]. Figure 3 , Figure 4a and Figure 5 The second fastener 50 can be a bolt.

[0124] The second connecting portion 32 may be provided with a third threaded hole 321. The opening of the third threaded hole 321 may be located on the end face of the second connecting portion 32, wherein the end face of the second connecting portion 32 is the surface of the second connecting portion 32 facing the engine 20. The third threaded hole 321 may be recessed into the second connecting portion 32 from its end face. The extending direction of the third threaded hole 321 may be parallel to the axial direction of the second connecting portion 32. That is, the extending direction of the third threaded hole 321 may be perpendicular to the radial direction of the second connecting portion 32. The third threaded hole 321 may be used for threaded connection with the second fastener 50.

[0125] The second flange portion 211 may be provided with a fourth threaded hole 213. The opening of the fourth threaded hole 213 may be located on the end face of the second flange portion 211, wherein the end face of the second flange portion 211 is the end face of the second flange portion 211 facing the coupling 30. The fourth threaded hole 213 may be recessed into the second flange portion 211 from its end face. The extending direction of the fourth threaded hole 213 may be parallel to the axial direction of the second flange portion 211. That is, the extending direction of the fourth threaded hole 213 may be perpendicular to the radial direction of the second flange portion 211. The fourth threaded hole 213 can be used for threaded connection with the second fastener 50.

[0126] When the second flange portion 211 and the second connecting portion 32 are stacked, the third threaded hole 321 and the fourth threaded hole 213 can be sequentially arranged and connected along the axial direction of the second connecting portion 32. The second fastener 50 can be installed in the third threaded hole 321 and the fourth threaded hole 213 to fix the second connecting portion 32 and the second flange portion 211.

[0127] In this embodiment, please refer to Figure 7 , Figure 7 It is along Figure 2 The diagram shows a cross-section obtained by cutting along section line BB.

[0128] The number of first fasteners 40 and second fasteners 50 can both be multiple. The projection of any first fastener 40 along the axial direction of the coupling 30 is offset from the projection of any second fastener 50 along the axial direction of the coupling 30.

[0129] It is understandable that by alternately installing multiple first fasteners 40 and multiple second fasteners 50 in the circumferential direction of the coupling 30, the load on the coupling 30 can be distributed, making the force on the coupling 30 more even. The circumferential direction of the coupling 30 is the direction around the central axis of the coupling 30.

[0130] For example, the number of third threaded holes 321 can be six. The six third threaded holes 321 can be spaced apart along the circumferential direction of the second connecting portion 32. The circumferential direction of the second connecting portion 32 is the direction surrounding its central axis. The number of fourth threaded holes 213 can be six, and the six fourth threaded holes 213 can be spaced apart along the circumferential direction of the second flange portion 211. The number of second fasteners 50 can be six. Six first fasteners 50 are spaced apart on the second flange portion 211 of the first drive shaft 11 and the second connecting portion 32 of the coupling 30. Each second fastener 50 is installed in one third threaded hole 321 and one fourth threaded hole 213. The six first fasteners 50 and the six second fasteners 50 are installed alternately.

[0131] In the embodiments of this application, the first drive shaft 11 of the motor 10 and the second drive shaft 21 of the engine 20 are coaxially arranged. Coaxial arrangement of the first drive shaft 11 and the second drive shaft 21 means that the central axis of the first drive shaft 11 coincides with the central axis of the second drive shaft 21, or that the distance difference between the central axis of the first drive shaft 11 and the central axis of the second drive shaft 21 is within an allowable error range.

[0132] It is understandable that when the first drive shaft 11 of the motor 10 is coaxially arranged with the second drive shaft 21 of the engine 20, the motor 10 can have active vibration damping characteristics. It can apply reverse torque to the second drive shaft 21 of the engine 20 through the first drive shaft 11 of the motor 10 to suppress the vibration of the second drive shaft 21 of the engine 20, thereby improving the NVH performance of the enhancer.

[0133] The above are merely some embodiments and implementation methods of this application. The scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A range extender, characterized in that, The range extender includes: An electric motor, the electric motor including a first drive shaft, the first drive shaft including a first flange portion; An engine, the engine including a second drive shaft, the second drive shaft including a second flange portion; and A coupling comprising a first connecting part, a second connecting part, and an elastic part, wherein the first connecting part is detachably connected to a first flange part, the second connecting part is detachably connected to a second flange part, and the elastic part is elastically connected between the first connecting part and the second connecting part.

2. The range extender as described in claim 1, characterized in that, The first drive shaft also includes a first shaft body, which is fixedly connected to the side of the first flange portion away from the first connecting portion. The first shaft body is coaxially arranged with the first flange portion, and the first flange portion is also sleeved on the periphery of the first connecting portion. The range extender also includes a first fastener, which is detachably connected to the first flange and the first connecting part. The first flange is fixed to the first connecting part by the first fastener, and the axial direction of the first fastener is perpendicular to the axial direction of the first shaft.

3. The range extender as described in claim 2, characterized in that, The motor also includes a housing, with at least a portion of the first shaft located inside the housing and the first flange located outside the housing.

4. The range extender as described in claim 2, characterized in that, The first shaft and the first flange are connected to form an integral structure.

5. The range extender according to any one of claims 1-4, characterized in that, The second drive shaft also includes a second shaft body, which is fixedly connected to the side of the second flange portion away from the second connecting portion. The second shaft body and the second flange portion are coaxially arranged, and the second flange portion and the second connecting portion are stacked on top of each other. The range extender also includes a second fastener, which is detachably connected to the second flange and the second connecting part. The second flange is fixed to the second connecting part by the second fastener, and the axial direction of the second fastener is parallel to the axial direction of the second shaft.

6. The range extender as described in claim 5, characterized in that, The number of the first fasteners is multiple, and the multiple first fasteners are connected to the first flange portion and the first connecting portion at intervals along the circumferential direction of the first flange portion; The number of the second fasteners is multiple, and the multiple second fasteners are spaced apart and connected to the second flange portion and the second connecting portion along the circumferential direction of the second flange portion; The projection of any one of the first fasteners along the axial direction of the coupling is offset from the projection of any one of the second fasteners along the axial direction of the coupling.

7. The range extender according to any one of claims 1-4, characterized in that, The first drive shaft and the second drive shaft are coaxially arranged.

8. The range extender according to any one of claims 1-4, characterized in that, The motor is an axial flux motor.

9. The range extender according to any one of claims 1-4, characterized in that, The elastic part is an integral elastic diaphragm assembly.

10. A vehicle, characterized in that, The vehicle includes a range extender as described in any one of claims 1-9.

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