Electric drive system and vehicle

Abstract

The application provides an electric drive system and a vehicle, comprising a shell, a containing space formed in the shell, at least one set of motor assemblies arranged in the containing space, each set of motor assemblies comprising a stator and an outer rotor, at least one output shaft corresponding to each motor assembly, the output shaft penetrating the shell along the axial direction of the stator, and at least one set of transmission assemblies arranged in the containing space, the transmission assemblies being used for connecting the outer rotor and the output shaft, wherein in the radial direction of the motor assembly, at least part of the outer rotor is arranged on the circumferential outside of the stator and can rotate around the stator, and the transmission assembly is located between the stator and the output shaft, thereby regulating the arrangement position of the torque transmission member in the electric drive system, solving the problems of low space integration and utilization in the electric drive system, optimizing the overall space of the electric drive system, and being capable of regulating the arrangement position of each component in the electric drive system.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, and more particularly to an electric drive system and a vehicle. Background Technology

[0002] Currently, in the field of new energy vehicles, the common approach involves using an electric motor to drive gears to rotate, thereby transmitting torque to the wheels. Existing solutions typically include torque transmission components such as sun gears and planetary gears to transfer torque from the stator / rotor to the wheels. However, the arrangement of these torque transmission components within the electric drive structure is rather scattered, resulting in low space integration and utilization within the electric drive structure. Utility Model Content

[0003] This application provides an electric drive system and vehicle to solve the problem that the existing torque transmission components are scattered in the electric drive structure, resulting in low space integration and utilization within the electric drive structure.

[0004] In a first aspect, embodiments of this application provide an electric drive system, including:

[0005] A housing having an internal receiving space;

[0006] At least one set of motor assemblies is disposed within the receiving space, and each set of motor assemblies includes a stator and an outer rotor;

[0007] At least one output shaft, each of the output shafts being provided corresponding to each of the motor assemblies, the output shafts passing through the housing along the axial direction of the stator;

[0008] At least one set of transmission components is disposed within the receiving space, the transmission components being used to connect the outer rotor and the output shaft;

[0009] In the radial direction of the motor assembly, at least a portion of the outer rotor is disposed on the circumferentially outer side of the stator and is rotatable around the stator, and the transmission assembly is located between the stator and the output shaft.

[0010] In one embodiment, the electric drive system includes a first motor assembly, a second motor assembly, a first output shaft, a second output shaft, a first transmission assembly, and a second transmission assembly. The first motor assembly, the first transmission assembly, and the first output shaft form a first power output structure, and the second motor assembly, the second transmission assembly, and the second output shaft form a second power output structure.

[0011] The housing includes a middle shell, a first shell, and a second shell. In the axial direction, the first shell and the second shell are located on both sides of the middle shell, and a first receiving space for accommodating the first power output structure is formed between the first shell and the middle shell, and a second receiving space for accommodating the second power output structure is formed between the second shell and the middle shell.

[0012] In one embodiment, the transmission assembly includes a first gear, a second gear, a gear ring, and a support frame; wherein,

[0013] The first gear is disposed on the side of the outer rotor facing the middle shell, and the first gear and the outer rotor are fixedly connected;

[0014] The second gear is located circumferentially outside the first gear and meshes with the first gear;

[0015] The gear ring is located circumferentially outside the second gear, and the inner side of the gear ring has teeth that mesh with the second gear.

[0016] The support frame is located on the side of the first gear facing the middle shell, the support frame is connected to the second gear, and the output shaft passes through the support frame and is fixedly connected to the support frame.

[0017] In one embodiment, the output shaft passes through the support frame, the first gear, and the outer rotor simultaneously in the axial direction.

[0018] In one embodiment, the transmission assembly further includes a first bearing disposed on the outer side of the support frame in the radial direction and located between the support frame and the middle shell; wherein, in the radial direction, the first bearing and the middle shell / the first bearing and the support frame form an interference fit.

[0019] In one embodiment, the outer rotor and the first gear are installed with an interference fit.

[0020] In one embodiment, the stator of the first motor assembly and the stator of the second motor assembly are both connected to the middle housing and are installed with an interference fit to the middle housing; the outer rotor of the first motor assembly is connected to the first housing and is installed with an interference fit to the first housing, and the outer rotor of the second motor assembly is connected to the second housing and is installed with an interference fit to the second housing.

[0021] In one embodiment, the middle shell has a first extension portion formed in the direction of the first shell, and the middle shell has a second extension portion formed in the direction of the second shell. The stator of the first motor assembly is sleeved on the first extension portion and is interference-fitted with the first extension portion, and the stator of the second motor assembly is sleeved on the second extension portion and is interference-fitted with the second extension portion.

[0022] In one embodiment, the transmission assembly includes a second bearing disposed on the outer rotor of the first motor assembly / outer rotor of the second motor assembly in the radial direction and located between the first housing and the outer rotor of the first motor assembly / between the second housing and the outer rotor of the second motor assembly.

[0023] Secondly, embodiments of this application also provide a vehicle including the electric drive system described in any of the above embodiments.

[0024] The electric drive system provided in this application includes a housing, at least one set of motor assemblies, at least one output shaft, and at least one set of transmission assemblies. The at least one set of motor assemblies is disposed within a receiving space, and each set of motor assemblies includes a stator and an outer rotor. Each output shaft is disposed corresponding to each motor assembly and passes through the housing along the axial direction of the stator. The at least one set of transmission assemblies is disposed within the receiving space and is used to connect the outer rotor and the output shaft. In the radial direction of the motor assembly, at least a portion of the outer rotor is disposed on the circumferential outer side of the stator and is capable of rotating around the stator. The transmission assemblies are located between the stator and the output shaft. By restricting the position of the transmission assemblies used to transmit torque to between the stator and the output shaft, the arrangement of torque transmission components within the electric drive system is standardized, thereby solving the problem of low space integration and utilization within the electric drive system and optimizing the overall space of the electric drive system. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the overall structure of the electric drive system provided in an embodiment of this application.

[0027] Figure 2 This is a schematic diagram of the overall structure of the electric drive system from another perspective, which is an embodiment of this application.

[0028] Figure 3 for Figure 2 The diagram shows a cross-sectional view of the electric drive system along the AA direction.

[0029] Explanation of reference numerals in the attached figures:

[0030] 100. Electric drive system;

[0031] 110. Shell; 111. Middle shell; 1111. First extension; 1112. Second extension; 112. First shell; 113. Second shell; 114. First receiving space; 115. Second receiving space; 166. Gear ring;

[0032] 120. First motor assembly; 121. First stator; 122. First outer rotor; 1221. First part; 1222. Second part;

[0033] 130. Second motor assembly; 131. Second stator; 132. Second outer rotor;

[0034] 140. First output shaft;

[0035] 150. Second output shaft;

[0036] 160. First transmission assembly; 161. First gear; 162. Second gear; 163. Support frame; 1631. Connecting component; 164. First bearing; 165. Second bearing;

[0037] 170. Second transmission component. Detailed Implementation

[0038] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0039] This application provides an electric drive system 100. Please refer to... Figure 1-3 The electric drive system 100 provided in this embodiment includes a housing 110, and a receiving space is formed within the housing 110. Meanwhile, as... Figure 3As shown, the electric drive system 100 also includes a first motor assembly 120, a second motor assembly 130, a first output shaft 140, a second output shaft 150, a first transmission assembly 160, and a second transmission assembly 170. The first motor assembly 120, the first transmission assembly 160, and the first output shaft 140 form a first power output structure. The second motor assembly 130, the second transmission assembly 170, and the second output shaft 150 form a second power output structure with the same structure and layout as the first power output structure. The electric drive system 100 provided in this embodiment will be described in detail below using the first motor assembly 120, the first transmission assembly 160, and the first output shaft 140 as examples.

[0040] Furthermore, such as Figure 3 As shown, in this embodiment, the first motor assembly 120 is disposed within the accommodating space, and the first motor assembly 120 includes a first stator 121 and a first outer rotor 122, and at least a portion of the first outer rotor 122 is disposed on the circumferential outer side of the first stator 121 and is capable of rotating around the first stator 121 to achieve the function of outputting torque under the action of a magnetic field.

[0041] Specifically, in this embodiment, such as Figure 3 As shown, the first outer rotor 122 includes a first part 1221 and a second part 1222 that are connected to each other or integrally formed. The first part 1221 is disposed on the circumferential outer side of the first stator 121 in the radial direction, and the second part 1222 is disposed on the outer side of the first stator 121 in the axial direction. Thus, the first part 1221 and the second part 1222 achieve the purpose of covering part of the first stator 121, so as to achieve the protective effect of the first stator 121.

[0042] Furthermore, such as Figure 3 As shown, in this embodiment, the first output shaft 140 is disposed corresponding to the first motor assembly 120, and the first output shaft 140 passes through the housing 110 along the axial direction of the first stator 121 to connect to the wheel; simultaneously, as Figure 3As shown, the first transmission assembly 160 is also disposed within the accommodating space, with one end of the first transmission assembly 160 connected to the first outer rotor 122 and the other end connected to the first output shaft 140. The torque output by the first outer rotor 122 is then transmitted to the wheel through the transmission function of the first transmission assembly 160 and the first output shaft 140. Furthermore, in this embodiment, the first transmission assembly 160 is located between the first stator 121 and the first output shaft 140 in the radial direction of the motor assembly. By restricting the position of the first transmission assembly 160 for transmitting torque to between the first stator 121 and the first output shaft 140, the arrangement of the torque transmission components within the electric drive system 100 is standardized, thereby addressing the problem of low space integration and utilization within the electric drive system 100. This improves the integration of the electric drive system 100 and optimizes its overall space.

[0043] It should be noted that in other embodiments, multiple sets of motor assemblies, transmission assemblies and output shafts may be provided, which can be set according to the internal structure of the electric drive system 100, and are not limited here.

[0044] In some embodiments, such as Figure 1 and Figure 3 As shown, in this embodiment, a first motor assembly 120, a first transmission assembly 160, and a first output shaft 140 are defined to form a first power output structure, and a second motor assembly 130, a second transmission assembly 170, and a second output shaft 150 are defined to form a second power output structure. The first power output structure and the second power output structure are identical and mirror images of each other. For example, the first motor assembly 120 includes a first stator 121 and a first outer rotor 122, and the second motor assembly 130 includes a second stator 131 and a second outer rotor 132.

[0045] For further information, please refer to [link / reference]. Figure 1 and Figure 3 In this embodiment, the housing 110 includes an interconnected middle housing 111, a first housing 112, and a second housing 113. In the axial direction, the first housing 112 and the second housing 113 are located on both sides of the middle housing 111, and a first receiving space 114 for accommodating the first power output structure is formed between the first housing 112 and the middle housing 111. A second receiving space 115 for accommodating the second power output structure is formed between the second housing 113 and the middle housing 111. By mirroring the first power output structure and the second power output structure in the first receiving space 114 and the second receiving space 115, the arrangement of the components in the electric drive system 100 can be standardized, thereby improving the integration of the electric drive system 100.

[0046] In some embodiments, such as Figure 3As shown, the first transmission assembly 160 includes a first gear 161, a second gear 162, a gear ring 166, and a support frame 163. The first gear 161 is disposed on the side of the first outer rotor 122 facing the middle shell 111, and the first gear 161 and the first outer rotor 122 are fixedly connected, thereby realizing the purpose of transmitting the torque on the first stator 121 and the first outer rotor 122 to the first gear 161.

[0047] It should be noted that this embodiment does not limit the fixed connection method of the first gear 161 and the first outer rotor 122. For example, it can be a fixed connection method such as welding, screwing or spline connection. In addition, in one embodiment, the first outer rotor 122 and the first gear 161 can also be installed by interference fit, thereby further improving the integration of the electric drive system 100 and ensuring the stability of power transmission.

[0048] For further information, please refer to [link / reference]. Figure 3 In this embodiment, the second gear 162 is located circumferentially outside the first gear 161, and the second gear 162 meshes with the first gear 161; at the same time, the gear ring 166 is located circumferentially outside the second gear 162, and the inner side of the gear ring 166 has teeth that mesh with the second gear 162.

[0049] It is understood that in this embodiment, when the torque on the first stator 121 and the first outer rotor 122 is transmitted to the first gear 161, since the second gear 162 meshes with the first gear 161 and a toothed ring 166 is formed on the outer circumferential side of the second gear 162, the second gear 162 can be driven to make circumferential displacement on the toothed ring 166, so as to achieve the purpose of transmitting torque to the second gear 162.

[0050] In addition, such as Figure 3 As shown, in this embodiment, the support frame 163 is located on the side of the first gear 161 facing the middle shell 111. The support frame 163 is connected to the second gear 162. That is, since the support frame 163 and the second gear 162 are connected to each other, when the second gear 162 makes a circumferential displacement on the gear ring 166, the torque transmitted to the second gear 162 can be transmitted to the support frame 163 again. At the same time, the first output shaft 140 passes through the support frame 163 and is fixedly connected to the support frame 163. At this time, the torque can be transmitted to the first output shaft 140 again and finally transmitted to the wheel.

[0051] It should be noted that this embodiment does not limit the connection method between the support frame 163 and the second gear 162 / support frame 163 and the first output shaft 140. For example, it can be a fixed connection method such as welding, screwing or spline connection, which is not limited here.

[0052] This embodiment transmits the torque on the first stator 121 and the first outer rotor 122 step by step to the first gear 161, the second gear 162, the gear ring 166, the support frame 163 and the first output shaft, and finally to the wheel. This power transmission mode can standardize the arrangement of torque transmission components in the electric drive system 100, so as to solve the problem of low space integration and utilization in the electric drive system 100, thereby improving the integration of the electric drive system 100 and optimizing the overall space of the electric drive system 100.

[0053] In some embodiments, such as Figure 3 As shown, in the axial direction, the first output shaft 140 simultaneously passes through the support frame 163, the first gear 161, and the first outer rotor 122. By coaxially arranging the support frame 163, the first gear 161, and the first outer rotor 122 in the axial direction, the integration of the electric drive system 100 is further improved and the overall space of the electric drive system 100 is optimized.

[0054] Furthermore, such as Figure 3 As shown, in other embodiments, the support frame 163 may be formed with a connector 1631 extending toward the second gear 162, the connector 1631 being disposed through the second gear 162 to achieve the purpose of connecting the support frame 163 and the second gear 162.

[0055] It is understood that in this embodiment, the first gear 161 can be a sun gear, the second gear 162 can be a planet gear, and there can be multiple second gears 162. Multiple second gears 162 are disposed on the circumferential outer side of the first gear 161 and mesh with the first gear 161 at the same time to further improve the torque transmission efficiency.

[0056] In some embodiments, such as Figure 3 As shown, the transmission assembly includes a first bearing 164, which is disposed on the outer side of the support frame 163 in the radial direction and located between the support frame 163 and the middle shell 111. The height of the first bearing 164 in the radial direction is greater than the gap between the support frame 163 and the middle shell 111 in the radial direction, thereby enabling an interference fit between the first bearing 164 and the middle shell 111 / the first bearing 164 and the support frame 163. This not only ensures the movement support of the support frame 163, but also further optimizes the internal space of the electric drive system 100.

[0057] It should be noted that in this embodiment, the number of first bearings 164 can be multiple, and there is no limitation. In addition, in other embodiments, the first bearings 164 can be omitted, and the first bearings 164 can be replaced by an interference fit between the support frame 163 and the middle shell 111.

[0058] In some embodiments, such as Figure 3 As shown, the first stator 121 and the second stator 131 are both connected to the middle shell 111 and are installed with the middle shell 111 by an interference fit. At the same time, the first outer rotor 122 is connected to the first housing 112 and is installed with the first housing 112 by an interference fit. The second outer rotor 132 is connected to the second housing 113 and is installed with the second housing 113 by an interference fit. This can disperse the stress generated during power transmission, thereby avoiding deformation of the middle shell 111 / first housing 112 / second housing 113, and ensuring the stability of the electric drive system 100 during operation.

[0059] For further information, please refer to [link / reference]. Figure 3 In this embodiment, the middle shell 111 has a first extension 1111 formed in the direction of the first shell 112. In the radial direction, the first stator 121 is sleeved on the first extension 1111 and forms an interference fit with the first extension 1111, thereby optimizing the overall size of the electric drive system 100 in the radial direction and ensuring the connection stability between the first stator 121 and the middle shell 111. Similarly, the middle shell 111 can also have a second extension 1112 formed in the direction of the second shell 113. In the radial direction, the second stator 131 is sleeved on the second extension 1112 and forms an interference fit with the second extension 1112.

[0060] In some embodiments, such as Figure 3 As shown, the transmission assembly includes a second bearing 165, which is disposed on the outer side of the first outer rotor 122 in the radial direction and located between the first housing 112 and the first outer rotor 122. The height of the second bearing 165 in the radial direction is greater than the gap between the first housing 112 and the first outer rotor 122 in the radial direction, thereby enabling the first housing 112 and the first outer rotor 122 to form an interference fit through the second bearing 165. This not only ensures the movement support of the first outer rotor 122, but also further optimizes the internal space of the electric drive system 100. Similarly, the second bearing 165 can also be disposed on the outer side of the second outer rotor 132 in the radial direction, without limitation.

[0061] It should be noted that the number of second bearings 165 is not limited in this embodiment, and can be adjusted according to the actual situation.

[0062] This application also provides a vehicle that includes the electric drive system mentioned in any of the above embodiments.

[0063] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0064] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more features.

[0065] The electric drive structure and vehicle provided in the embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. An electric drive system, characterized in that, include: A housing having an internal receiving space; At least one set of motor assemblies is disposed within the receiving space, and each set of motor assemblies includes a stator and an outer rotor; At least one output shaft, each of the output shafts being provided corresponding to each of the motor assemblies, the output shafts passing through the housing along the axial direction of the stator; At least one set of transmission components is disposed within the receiving space, the transmission components being used to connect the outer rotor and the output shaft; In the radial direction of the motor assembly, at least a portion of the outer rotor is disposed on the circumferentially outer side of the stator and is rotatable around the stator, and the transmission assembly is located between the stator and the output shaft.

2. The electric drive system according to claim 1, characterized in that, The electric drive system includes a first motor assembly, a second motor assembly, a first output shaft, a second output shaft, a first transmission assembly, and a second transmission assembly. The first motor assembly, the first transmission assembly, and the first output shaft form a first power output structure, and the second motor assembly, the second transmission assembly, and the second output shaft form a second power output structure. The housing includes a middle shell, a first shell, and a second shell. In the axial direction, the first shell and the second shell are located on both sides of the middle shell, and a first receiving space for accommodating the first power output structure is formed between the first shell and the middle shell, and a second receiving space for accommodating the second power output structure is formed between the second shell and the middle shell.

3. The electric drive system according to claim 2, characterized in that, The transmission assembly includes a first gear, a second gear, a gear ring, and a support frame; wherein, The first gear is disposed on the side of the outer rotor facing the middle shell, and the first gear and the outer rotor are fixedly connected; The second gear is located circumferentially outside the first gear and meshes with the first gear; The gear ring is located circumferentially outside the second gear, and the inner side of the gear ring has teeth that mesh with the second gear. The support frame is located on the side of the first gear facing the middle shell, the support frame is connected to the second gear, and the output shaft passes through the support frame and is fixedly connected to the support frame.

4. The electric drive system according to claim 3, characterized in that, In the axial direction, the output shaft passes through the support frame, the first gear, and the outer rotor simultaneously.

5. The electric drive system according to claim 3, characterized in that, The transmission assembly further includes a first bearing, which is disposed on the outer side of the support frame in the radial direction and located between the support frame and the middle shell; wherein, in the radial direction, the first bearing and the middle shell / the first bearing and the support frame form an interference fit.

6. The electric drive system according to claim 3, characterized in that, The outer rotor and the first gear are installed with an interference fit.

7. The electric drive system according to claim 2, characterized in that, The stator of the first motor assembly and the stator of the second motor assembly are both connected to the middle housing and are installed with an interference fit to the middle housing; the outer rotor of the first motor assembly is connected to the first housing and is installed with an interference fit to the first housing, and the outer rotor of the second motor assembly is connected to the second housing and is installed with an interference fit to the second housing.

8. The electric drive system according to claim 7, characterized in that, The middle shell has a first extension portion formed in the direction of the first shell, and the middle shell has a second extension portion formed in the direction of the second shell. The stator of the first motor assembly is sleeved on the first extension portion and is interference-fitted with the first extension portion. The stator of the second motor assembly is sleeved on the second extension portion and is interference-fitted with the second extension portion.

9. The electric drive system according to claim 7, characterized in that, The transmission assembly includes a second bearing disposed on the outer rotor of the first motor assembly / outer rotor of the second motor assembly in the radial direction and located between the first housing and the outer rotor of the first motor assembly / between the second housing and the outer rotor of the second motor assembly.

10. A vehicle, characterized in that, Includes the electric drive system as described in any one of claims 1-9.

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