Electric drive device, electric drive system and electric appliance

Abstract

This application relates to the field of electric vehicle technology, and proposes an electric drive device, an electric drive system, and an electrical device. The electric drive device includes a housing, a motor, a planetary transmission mechanism, and a first sliding member. The housing has an internal mounting surface, on which a bearing ring is provided along a first direction. The motor is disposed inside the housing and includes an output shaft extending along the first direction. The planetary transmission mechanism is disposed inside the housing and includes a transmission assembly and a planet carrier. The transmission assembly is connected to the output shaft, and the planet carrier is used to fix the transmission assembly. One end of the planet carrier has a bearing seat arranged along the first direction, which is rotatably sleeved with the bearing ring. There is an assembly gap between the bearing seat and the bearing ring. The first sliding member is disposed within the assembly gap and includes a first non-metallic component. The technical solution provided by the embodiments of this application can improve the noise and vibration problems of the electric drive device.

Description

Technical Field

[0001] This application relates to the field of electric vehicles, and in particular to an electric drive device, an electric drive system, and an electrical device. Background Technology

[0002] In new energy vehicles, the electric drive system is the core power system, and its performance and quality directly affect the overall performance of the vehicle. Currently, electric drive systems often integrate planetary transmission systems. Planetary transmission systems rely on the movement of gears to achieve functions such as power transmission and speed regulation. Due to their complex structure and power transmission characteristics, they may cause serious noise and vibration problems in practical applications, affecting the user's driving experience. Utility Model Content

[0003] In view of this, embodiments of this application provide an electric drive device, an electric drive system, and an electrical device to improve the noise and vibration problems of electric drive devices in related technologies.

[0004] An embodiment of the first aspect of this application provides an electric drive device, comprising: a housing having an internal mounting surface, the mounting surface having a bearing ring disposed along a first direction; a motor disposed inside the housing, the motor including an output shaft extending along the first direction; a planetary transmission mechanism disposed inside the housing, the planetary transmission mechanism including a transmission assembly and a planet carrier, the transmission assembly being connected to the output shaft, the planet carrier being used to fix the transmission assembly, one end of the planet carrier having a bearing seat disposed along the first direction, the bearing seat being rotatably sleeved with the bearing ring, and an assembly gap being provided between the bearing seat and the bearing ring; and a first sliding member disposed within the assembly gap, the first sliding member including a first non-metallic component.

[0005] In the electric drive device provided in this embodiment, the bearing housing of the planetary carrier is rotatably sleeved with the bearing ring of the housing, and an assembly gap is formed between the bearing housing and the bearing ring. A first sliding member is provided in the assembly gap, and the first sliding member includes a first non-metallic part. In this way, the meshing excitation force generated during the operation of the planetary transmission mechanism can be transmitted to the first sliding member through the bearing housing of the planetary carrier. Based on the damping characteristics and elastic buffering effect of the non-metallic material, the first sliding member can absorb and dissipate a part of the vibration energy, suppressing the vibration transmission between the planetary transmission mechanism and the housing in the radial direction, thereby effectively improving the noise and vibration problems of the electric drive device.

[0006] In some embodiments, the first non-metallic component is an annular gasket.

[0007] With the above design, the first non-metallic component can be directly installed between the bearing housing and the bearing ring without the need for additional fixing structures, thus reducing assembly difficulty.

[0008] In some embodiments, the bearing ring includes a first segment and a second segment distributed along a first direction, the outer diameter of the first segment being smaller than the outer diameter of the second segment, and a bearing housing being sleeved on the outside of the bearing ring, with an assembly gap formed between the bearing housing and the first segment.

[0009] By adopting the above design, the assembly structure of the bearing ring and bearing housing can be made more compact while ensuring the bearing ring support strength, thereby improving the space utilization efficiency within the housing.

[0010] In some embodiments, the first slider is spaced apart from the second segment along a first direction.

[0011] By adopting the above design, unnecessary friction and wear between the first sliding member and the second section can be avoided, which helps to extend the service life of the first sliding member and further improve the noise and vibration problems of the electric drive device.

[0012] In some embodiments, along a second direction, the first non-metallic element protrudes from the second segment, and the second direction is perpendicular to the first direction.

[0013] With the above design, the first non-metallic component can support the bearing housing, forming a gap between the inner wall of the bearing housing and the outer wall of the second section. This can prevent unnecessary friction and wear between the bearing housing and the second section. At the same time, this design also provides deformation space for the first non-metallic component, allowing the first sliding component to absorb some vibration energy through deformation.

[0014] In some embodiments, the electric drive device further includes a second slider disposed between the bearing housing and the housing along a first direction, and the second slider includes a second non-metallic component.

[0015] By adopting the above design, the second sliding member can absorb and dissipate a portion of the vibration energy, suppressing the vibration transmission between the planetary transmission mechanism and the housing in the axial direction, thereby further improving the noise and vibration problems of the electric drive device.

[0016] In some embodiments, the second non-metallic component is an annular gasket.

[0017] With the above design, the shape of the second non-metallic part is adapted to the bearing housing, which can better absorb the vibration energy generated by the planetary transmission.

[0018] In some embodiments, the bearing housing is sleeved outside the bearing ring, one end of the bearing housing along the first direction abuts against the assembly surface, and the second sliding member is disposed between the bearing housing and the assembly surface.

[0019] With the above design, the second non-metallic component is located outside the bearing ring, eliminating the need for a complex alignment structure and reducing assembly difficulty.

[0020] In some embodiments, the bearing housing is sleeved on the outside of the bearing ring, the inner wall of the bearing housing is formed with a flange, one end of the bearing ring along a first direction abuts against the flange, and a second sliding member is disposed between the bearing ring and the flange.

[0021] The above design allows for a more compact assembly structure of the bearing ring and bearing housing, further improving space utilization efficiency.

[0022] In some embodiments, the housing is internally configured with two bearing rings, and the planetary carrier has bearing seats at both ends along the first direction, with the two bearing seats rotatably connected to the two bearing rings respectively.

[0023] With the above design, both ends of the planetary carrier along the first direction are fixed to the housing, which can improve the smoothness of the planetary transmission mechanism and suppress vibration transmission at both ends, thereby further improving noise and vibration problems.

[0024] In some embodiments, the electric drive unit further includes a differential disposed inside the housing. The differential includes a differential assembly and a differential housing. The differential assembly is disposed inside the differential housing, and the differential housing is integrally disposed with the planetary carrier.

[0025] By adopting the above design, the connection and assembly gaps between the planetary transmission mechanism and the differential components can be reduced, making the entire device structure more compact and reducing the generation of noise and vibration during operation.

[0026] An embodiment of the second aspect of this application provides an electric drive system, including a battery device and the electric drive device of the first aspect, wherein the battery device and the electric drive system are electrically connected.

[0027] The electric drive system provided in this application improves noise and vibration issues by employing the electric drive device provided in the above embodiments, thereby enhancing the performance of the electric drive system.

[0028] An embodiment of the third aspect of this application provides an electrical device, including the electric drive system of the second aspect.

[0029] The electrical equipment provided in this application improves noise and vibration issues by adopting the electric drive system provided in the above embodiments, thereby enhancing the performance of the electric drive device.

[0030] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the structure of an existing electric drive device;

[0033] Figure 2 yes Figure 1 A cross-sectional view of the electric drive device shown.

[0034] Figure 3 yes Figure 2 Enlarged view of the structure shown in Figure A;

[0035] Figure 4 yes Figure 1 A partial cross-sectional view of the electric drive device shown.

[0036] Figure 5 This is a schematic diagram of the vehicle structure provided in the embodiments of this application;

[0037] Figure 6 This is an exploded view of the battery device provided in the embodiments of this application;

[0038] Figure 7 This is a cross-sectional view of the electric drive device provided in the embodiments of this application;

[0039] Figure 8 yes Figure 7 Enlarged view of the structure shown in B;

[0040] Figure 9 yes Figure 7 An enlarged view of the structure shown in C.

[0041] The markings in the diagram mean:

[0042] 1000, Vehicle; 100, Battery unit; 200, Electric drive unit;

[0043] 10. Vehicle body;

[0044] 20. Box; 21. First box; 22. Second box;

[0045] 30. Battery cell;

[0046] 40. Housing; 41. Bearing ring; 411. First section; 412. Second section; 42. Assembly surface; 421. Mounting surface; 422. Inner wall; 43. First sub-shell; 44. Second sub-shell;

[0047] 50. Motor; 51. Output shaft;

[0048] 60. Planetary transmission mechanism; 61. Transmission assembly; 611. Sun gear; 612. Planet gears; 62. Planet carrier; 621. Bearing housing; 6211. Flange; 63. Assembly clearance;

[0049] 70. First sliding member;

[0050] 80. Second sliding component;

[0051] 90. Differential; 91. Differential assembly. Detailed Implementation

[0052] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0053] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0054] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0055] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0056] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0057] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0058] In the description of the embodiments of this application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0059] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0060] As the core power system of a vehicle, the performance and quality of the electric drive system directly affect the overall performance of the vehicle. For related technologies, please refer to... Figures 1-4 , Figure 1 This is a front view of an existing electric drive unit. Figure 2 This is a cross-sectional view of an existing electric drive device. Figure 3 and Figure 4 for Figure 2 The enlarged view of the electric drive device shown indicates that the device includes a housing and a planetary transmission system. The planetary transmission system is housed inside the housing and is connected via metal bearings (such as...). Figure 3 and Figure 4 The structure shown in Figure a) is connected to the housing. The planetary transmission system can achieve functions such as power transmission and speed regulation by relying on the movement of gears. However, due to factors such as changes in meshing stiffness and manufacturing deviations, the gear pair will generate meshing excitation force at the meshing point when the planetary transmission system is working. This excitation force will be transmitted through the gear body to other key parts connected to it and reach the metal bearing. However, the elastic modulus of the metal bearing is too high, and it cannot effectively dissipate mechanical vibration energy. It will continue to transmit vibration to the housing, resulting in a significant vibration response on the surface of the housing. When this vibration response reaches a certain level, it will be converted into perceptible noise and vibration, affecting the user's driving experience.

[0061] Currently, the meshing excitation force can be reduced by optimizing gear tooth profile parameters and improving machining and manufacturing accuracy. However, the optimization, verification, and manufacturing costs of this improvement measure are high, and it still has significant limitations.

[0062] Based on the above reasons, in order to alleviate the noise and vibration problems of electric drive devices, this application provides an electric drive device, including a housing, a planetary transmission mechanism, and a first sliding member. The housing has an internal assembly surface with a bearing ring disposed thereon. The planetary transmission mechanism is disposed inside the housing and includes a planet carrier with a bearing seat. The bearing seat and the bearing ring are rotatably fitted together with each other, and there is an assembly gap between them. The first sliding member is disposed within the assembly gap and includes a first non-metallic component. During the operation of the electric drive device, the meshing excitation force generated by the planetary transmission mechanism can be transmitted to the first sliding member through the bearing seat of the planet carrier. Based on the damping characteristics and elastic buffering effect of the non-metallic material, the first sliding member can absorb and dissipate a portion of the vibration energy, suppressing the vibration transmission between the planetary transmission mechanism and the housing in the radial direction, thereby effectively improving the noise and vibration problems of the electric drive device.

[0063] The electric drive device provided in this application embodiment can be applied to electrical equipment that uses an electric drive device as a power source. The electrical equipment can be, but is not limited to, electric toys, electric vehicles, electric cars, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0064] For ease of explanation, this application uses a vehicle 1000 as an example of an electrical device.

[0065] Please refer to Figure 5 , Figure 5 This is a schematic diagram of the structure of a vehicle 1000 provided in some embodiments of this application. According to the power source, the vehicle 1000 can be a pure electric vehicle, a hybrid electric vehicle, or a range-extended electric vehicle, etc. According to the drive method, the vehicle 1000 can be a front-wheel drive vehicle, a rear-wheel drive vehicle, or a four-wheel drive vehicle. The vehicle 1000 includes a vehicle body 10 and an electric drive system.

[0066] The vehicle body 10 is the main supporting component of the vehicle 1000. The vehicle body 10 has a powertrain compartment and a passenger compartment. The powertrain compartment houses the vehicle 1000's power system, electronic control system, transmission system, etc., while the passenger compartment provides operating and seating space for the driver and passengers. When the vehicle 1000 is a front-wheel-drive vehicle, the powertrain compartment is located at the front of the vehicle body 10, i.e., the powertrain compartment is the front compartment; when the vehicle 1000 is a rear-wheel-drive vehicle, the powertrain compartment is located at the rear of the vehicle body 10, i.e., the powertrain compartment is the rear compartment; when the vehicle 1000 is a four-wheel-drive vehicle, the powertrain compartment is divided into a front compartment and a rear compartment, with the front compartment located at the front of the vehicle body 10 and the rear compartment located at the rear of the vehicle body 10. The passenger compartment is located between the front and rear of the vehicle body 10.

[0067] The electric drive system is the power system of vehicle 1000. It converts electrical energy into mechanical energy and outputs this mechanical energy to the wheels of vehicle 1000 to propel the vehicle. The electric drive system is located on the vehicle body 10; specifically, a portion of the electric drive system may be located within the powertrain compartment, and another portion may be located at the bottom of the vehicle body 10. The electric drive system includes a battery device 100 and an electric drive unit 200.

[0068] The battery unit 100 provides electrical power to the electric drive unit 200, and the battery unit 100 can be located at the bottom, front, or rear of the vehicle 1000. Please refer to... Figure 6 , Figure 6 This is an exploded view of a battery device 100 provided in some embodiments of this application. The battery device 100 includes a housing 20 and a battery cell 30, with the battery cell 30 housed within the housing 20. The housing 20 provides a space for accommodating the battery cell 30, and the housing 20 can adopt various structures. In some embodiments, the housing 20 may include a first housing 21 and a second housing 22, which overlap each other, and together define a space for accommodating the battery cell 30. The second housing 22 may be a hollow structure with one open end, and the first housing 21 may be a plate-like structure, with the first housing 21 covering the open side of the second housing 22 so that the first housing 21 and the second housing 22 together define the space; alternatively, the first housing 21 and the second housing 22 may both be hollow structures with one open side, with the open side of the first housing 21 covering the open side of the second housing 22. Of course, the box 20 formed by the first box 21 and the second box 22 can be of various shapes, such as a cylinder, a cuboid, etc.

[0069] In some embodiments, the housing 20 may be part of the chassis structure of the vehicle 1000. For example, a portion of the housing 20 may be at least a portion of the floor of the vehicle 1000, or a portion of the housing 20 may be at least a portion of the crossbeams and longitudinal beams of the vehicle 1000.

[0070] In some embodiments, the battery device 100 may not include the housing 20, but instead connect multiple battery cells 30 and assemble them into the vehicle 1000 after forming a whole by necessary fixing structures.

[0071] In the battery device 100, there can be multiple battery cells 30, which can be connected in series, parallel, or in a mixed configuration. A mixed configuration means that multiple battery cells 30 are connected in both series and parallel connections. Multiple battery cells 30 can be directly connected in series, parallel, or in a mixed configuration, and then the entire assembly of the multiple battery cells 30 is housed within the housing 20. Alternatively, the battery device 100 can also consist of multiple battery cells 30 first connected in series, parallel, or in a mixed configuration to form a battery cell assembly, and then these battery cell assemblies are further connected in series, parallel, or in a mixed configuration to form a whole, which is then housed within the housing 20. The battery device 100 may also include other functional components; for example, it may include a busbar component for achieving conductive connections between the multiple battery cell assemblies 30.

[0072] A battery cell 30 refers to the smallest unit comprising the battery device 100. Each battery cell 30 can be a secondary battery or a primary battery. A secondary battery is one that can be recharged to activate its active materials and continue to be used after being discharged. A primary battery is one that cannot be recharged to activate its active materials and continue to be used after its electrical energy is depleted. The battery cell 30 can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., but is not limited to these. The battery cell 30 can be cylindrical, flat, cuboid, or other shapes.

[0073] Please refer to this as well. Figure 7 , Figure 7This is a cross-sectional view of an electric drive device 200. The electric drive device 200 is used to convert electrical energy provided by the battery device 100 into mechanical energy and output the mechanical energy to the wheels of the vehicle 1000 to drive the vehicle 1000. The electric drive unit 200 is installed in the powertrain compartment. Specifically, when the vehicle 1000 is a front-wheel drive vehicle, the electric drive unit 200 is installed in the front compartment and is used to output the aforementioned mechanical energy to the front wheels of the vehicle 1000 to drive the vehicle 1000. When the vehicle 1000 is a rear-wheel drive vehicle, the electric drive unit 200 is installed in the rear compartment and is used to output the aforementioned mechanical energy to the rear wheels of the vehicle 1000 to drive the vehicle 1000. When the vehicle 1000 is a four-wheel drive vehicle, there are two electric drive units 200: one electric drive unit 200 is installed in the front compartment to output the aforementioned mechanical energy to the front wheels of the vehicle 1000, and the other electric drive unit 200 is installed in the rear compartment to output the aforementioned mechanical energy to the rear wheels of the vehicle 1000 to drive the vehicle 1000. The electric drive unit 200 mainly consists of an electric drive housing, a power supply, a motor, a transmission device, a controller, and sensors.

[0074] The technical solutions provided by the embodiments of this application will be described below with reference to the accompanying drawings. In the embodiments provided by this application, the X direction is the first direction, that is, the axial direction of the output shaft 51, the bearing seat 621 and the bearing ring 41, and the Y direction is the second direction, that is, the radial direction of the output shaft 51, the bearing seat 621 and the bearing ring 41. The X direction and the Y direction are perpendicular.

[0075] An embodiment of the first aspect of this application provides an electric drive device 200. Please refer to... Figure 7 , Figure 8 and Figure 9 , Figure 7 This is a cross-sectional view of the electric drive device 200 provided in an embodiment of this application. Figure 8 for Figure 7 Enlarged view of the structure shown in B. Figure 9 for Figure 7The enlarged view of the structure shown in Figure C shows that the electric drive device 200 includes a housing 40, a motor 50, a planetary transmission mechanism 60, and a first sliding member 70. The housing 40 has an internal mounting surface 42, on which a bearing ring 41 is disposed along a first direction X. The motor 50 is disposed inside the housing 40 and includes an output shaft 51 extending along the first direction X. The planetary transmission mechanism 60 is disposed inside the housing 40 and includes a transmission assembly 61 and a planetary carrier 62. The transmission assembly 61 is connected to the output shaft 51, and the planetary carrier 62 is used to fix the transmission assembly 61. One end of the planetary carrier 62 has a bearing seat 621 disposed along the first direction X, which is rotatably sleeved with the bearing ring 41. An assembly gap 63 exists between the bearing seat 621 and the bearing ring 41. The first sliding member 70 is disposed within the assembly gap 63 and includes a first non-metallic component.

[0076] The housing 40 refers to the structure in the electric drive unit 200 that provides housing space and a fixed foundation for the motor 50, planetary transmission mechanism 60, and other structures. The housing 40 can have various shapes and sizes; for example, it can be a single integral structure or it can comprise multiple assembled sub-housings. The housing 40 can be a regular shape such as a cuboid, cube, or cylinder, or it can be an irregular shape with complex curves and openings. The mounting surface 42 can refer to the mounting surface 421 formed inside the housing 40, or it can be the inner wall 422 of the housing 40. The material of the housing 40 can include metal, plastic, or other materials.

[0077] The bearing ring 41 is an annular support structure fixed inside the housing 40, mainly used to provide support and guidance for the planetary carrier 62. The bearing ring 41 can be made of metal, plastic or other materials.

[0078] The motor 50 is the power source of the electric drive device 200, used to convert input electrical energy into mechanical energy output to provide power to the planetary transmission mechanism 60 or other structures. The output shaft 51 is the output part of the motor 50, used to connect to the planetary transmission mechanism 60 or other structures.

[0079] The planetary transmission mechanism 60 is an important component of the transmission system in the electric drive device 200, mainly used for power transmission, speed regulation, and torque conversion. The planetary transmission mechanism 60 can be positioned on one side of the motor 50 along the first direction X. The planetary transmission mechanism 60 can be of various types, such as a single-stage planetary transmission mechanism, a multi-stage planetary transmission mechanism, a compound planetary transmission mechanism, etc.

[0080] The transmission assembly 61 refers to the integrated component in the planetary transmission mechanism 60 used to realize power transmission, speed regulation, and torque conversion. The transmission assembly 61 may include a sun gear 611 and a plurality of planet gears 612, wherein the sun gear 611 is located at the center and can be directly or indirectly connected to the output shaft 51, for example, it can be directly mounted on the output shaft 51, and the planet gears 612 are arranged around the sun gear 611 and mesh with the sun gear 611.

[0081] The planet carrier 62 refers to the structure in the planetary transmission mechanism 60 used to fix and support the planet gears 612. The planet carrier 62 is connected to the housing 40 via a bearing seat 621 and can rotate freely relative to the housing 40 about a first direction X with the bearing ring 41 as the pivot point. The planet carrier 62 may include a main frame and structures such as the bearing seat 621 and planet gear shafts mounted on the main frame, wherein the planet gear shafts support the planet gears 612. The planet carrier 62 may be made of metal, plastic, or other materials.

[0082] The bearing housing 621 is a ring-shaped mounting structure fixed to the main frame of the planetary carrier 62, primarily used to provide an installation position. The bearing housing 621 connects the planetary carrier 62 to the housing 40 through its cooperation with the bearing ring 41. The bearing housing 621 can be fitted onto the outside of the bearing ring 41 or inserted into the inside of the bearing ring 41. Along the first direction X, the bearing housing 621 is located at one end of the main frame of the planetary carrier 62. The material of the bearing housing 621 can include metal, plastic, or other materials.

[0083] The first sliding member 70 refers to a sliding component disposed between the bearing housing 621 and the bearing ring 41, used to support the bearing housing 621 radially. The first sliding member 70 may be composed of a first non-metallic component, or may be a combination of the first non-metallic component and other structures; the first non-metallic component is made of a non-metallic material, possessing a low coefficient of friction and good self-lubricating properties. The material of the first non-metallic component may be, but is not limited to, polytetrafluoroethylene, polyimide, etc. The shape of the first sliding member 70 matches the shape of the assembly gap 63, and may be annular, sheet-like, or other shapes. Understandably, compared to metallic materials, non-metallic materials have better damping characteristics. This damping characteristic allows the first non-metallic component to absorb vibrational energy and convert it into heat energy or the energy of internal molecular motion. Furthermore, some non-metallic materials also possess elasticity, which allows the first non-metallic component to absorb vibrational energy through deformation.

[0084] In traditional designs, the bearing housing 621 and bearing ring 41 are generally made of high-strength materials, such as cast steel, cast iron, and aluminum alloy. Under high load and long-term operation conditions, direct contact between the two leads to high friction, resulting in significant frictional loss and excessive heat generation. Therefore, a bearing connection is needed to effectively reduce energy loss and heat generation. In this embodiment, a first sliding member 70 is provided between the bearing housing 621 and the bearing ring 41, avoiding direct contact between them. Furthermore, since the first sliding member 70 includes a first non-metallic component, and non-metallic materials have low friction coefficients, self-lubricating properties, and good wear resistance, the first sliding member 70 can significantly reduce sliding work, energy loss, and heat generation by reducing the friction coefficient. Based on this, the first sliding member 70 can replace the traditional bearing structure.

[0085] In the electric drive device 200 provided in the above embodiment, the bearing seat 621 of the planetary carrier 62 is rotatably sleeved with the bearing ring 41 of the housing 40, and an assembly gap 63 is formed between the bearing seat 621 and the bearing ring 41. A first sliding member 70 is provided in the assembly gap 63, and the first sliding member 70 includes a first non-metallic part. In this way, the meshing excitation force generated during the operation of the planetary transmission mechanism 60 can be transmitted to the first sliding member 70 through the bearing seat 621 of the planetary carrier 62. Based on the damping characteristics and elastic buffering effect of the non-metallic material, the first sliding member 70 can absorb and dissipate a part of the vibration energy, suppress the vibration transmission between the planetary transmission mechanism 60 and the housing 40 in the radial direction, thereby effectively improving the noise and vibration problems of the electric drive device 200.

[0086] Please refer to Figure 7 and Figure 8 In some embodiments, the first non-metallic component is an annular gasket.

[0087] An annular gasket refers to a thin sheet structure with an annular geometry. Along the first direction X, the first non-metallic element has a greater length to provide a larger coverage area, thereby effectively isolating the bearing housing 621 and the bearing ring 41. The dimensions of the first non-metallic element are determined according to assembly requirements. For example, when the bearing housing 621 is fitted over the bearing ring 41, the outer diameter of the first non-metallic element matches the inner diameter of the bearing housing 621 to ensure a tight fit against the inner wall 422 of the bearing housing 621, and the inner diameter of the first non-metallic element matches the outer diameter of the bearing ring 41 to ensure a tight fit against the outer wall of the bearing ring 41.

[0088] With the above design, the first non-metallic component can be directly installed between the bearing housing 621 and the bearing ring 41 without the need for additional fixing structures, thus reducing assembly difficulty. At the same time, the first non-metallic component can be designed to be larger in size, thereby absorbing more vibration energy.

[0089] Understandably, in some other embodiments, the first non-metallic component may also include a plurality of independent small-sized block-shaped gaskets, which are distributed circumferentially around the bearing ring 41 and can be bonded to the bearing housing 621 or the bearing ring 41.

[0090] Please refer to Figure 7 and Figure 8 In some embodiments, the bearing ring 41 includes a first segment 411 and a second segment 412 distributed along a first direction X. The outer diameter of the first segment 411 is smaller than the outer diameter of the second segment 412. The bearing seat 621 is sleeved on the outside of the bearing ring 41, and an assembly gap 63 is formed between the bearing seat 621 and the first segment 411.

[0091] The outer wall of the bearing ring 41 has a stepped structure, and the inner wall 422 of the bearing ring 41 can be a flat structure, or it can be designed with protrusions or grooves to meet different assembly requirements. Along the first direction X, the first segment 411 can have a larger length to provide a larger mounting surface 421 for the first sliding member 70 to be installed.

[0092] The first section 411 has a relatively small wall thickness, which can provide assembly space for the first sliding member 70. The second section 412 has a relatively large wall thickness, which can enhance the overall strength of the bearing ring 41. By adopting the above design, the assembly structure of the bearing ring 41 and the bearing housing 621 can be made more compact while ensuring the support strength of the bearing ring 41, thereby improving the space utilization efficiency within the housing 40.

[0093] Understandably, in some other embodiments, the bearing seat 621 may also be inserted inside the bearing ring 41, and the inner wall 422 of the bearing ring 41 may be designed as a stepped structure, with the first sliding member 70 sleeved on the outside of the bearing seat 621, or the bearing ring 41 may also be cylindrical, with both its inner and outer walls being flat structures.

[0094] Please refer to Figure 7 and Figure 8 In some instances, along the first direction X, the first slider 70 is spaced apart from the second segment 412.

[0095] The bearing ring 41 includes a first segment 411 and a second segment 412, and the outer diameter of the second segment 412 is larger than the outer diameter of the first segment 411. When the first sliding member 70 is disposed on the outer surface of the first segment 411, it can be opposite to the part of the second segment 412 that protrudes from the first segment 411. The above-mentioned interval arrangement means that the end of the first sliding member 70 along the first direction X does not directly contact the second segment 412.

[0096] In some cases, the first sliding member 70 is freely sleeved on the bearing ring 41. During the rotation of the planetary carrier 62, the first sliding member 70 may be driven to rotate. By adopting the above design, unnecessary friction and wear between the first sliding member 70 and the second section 412 can be avoided, which helps to extend the service life of the first sliding member 70 and further improve the noise and vibration problems of the electric drive device 200.

[0097] Please refer to Figure 7 and Figure 8 In some embodiments, along the second direction Y, the first non-metallic element protrudes from the second segment 412, and the second direction Y is perpendicular to the first direction X.

[0098] The aforementioned first non-metallic component protruding from the second segment 412 means that, radially, the surface of the first non-metallic component is higher than the outer wall of the second segment 412. In other words, along the second direction Y, the overall thickness of the first non-metallic component and the first segment 411 is greater than the wall thickness of the second segment 412. For example, the first non-metallic component may be an annular gasket fitted onto the outer wall of the first segment 411, and the outer diameter of the first non-metallic component is greater than the outer diameter of the second segment 412.

[0099] With the above design, the first non-metallic component can support the bearing housing 621, so that a gap is formed between the inner wall 422 of the bearing housing 621 and the outer wall of the second section 412. This can prevent unnecessary friction and wear between the bearing housing 621 and the second section 412. At the same time, this design also provides deformation space for the first non-metallic component, so that the first non-metallic component can absorb some vibration energy by deformation.

[0100] It is understood that in some other embodiments, the first sliding member 70 may also be designed as a multi-segment structure adapted to the shape of the bearing ring 41, wherein part of the first sliding member 70 is sleeved on the first segment 411 of the bearing ring 41, and another part is sleeved on the second segment 412 of the bearing ring 41.

[0101] Please refer to Figure 7 and Figure 8 In some embodiments, the electric drive device 200 further includes a second slider 80, which is disposed between the bearing seat 621 and the housing 40 along a first direction X. The second slider 80 includes a second non-metallic component.

[0102] The second sliding member 80 refers to a sliding component disposed between the bearing housing 621 and the housing 40, used to support the bearing housing 621 in the axial direction. The location of the second sliding member 80 is not unique. For example, the bearing housing 621 can be sleeved on the outside of the bearing ring 41, with the end of the bearing housing 621 along the first direction X abutting against the mounting surface 42, and the second sliding member 80 can be directly disposed at the end of the bearing housing 621. Or, for example, the bearing housing 621 can be sleeved on the outside of the bearing ring 41, with the inner wall 422 of the bearing housing 621 forming a flange 6211 structure and the flange 6211 abutting against the end of the bearing ring 41 along the first direction X, and the second sliding member 80 can be directly disposed at the flange 6211 inside the bearing housing 621. The second sliding member 80 can be composed of a second non-metallic member, or it can be a combination of the second non-metallic member and other structures. The second non-metallic member is made of a non-metallic material, has a low coefficient of friction and good self-lubricating properties. The material of the second non-metallic member can be, but is not limited to, polytetrafluoroethylene, polyimide, etc.; it is understood that the materials of the first non-metallic member and the second non-metallic member can be the same or different. The second sliding member 80 can have various shapes and sizes, for example, the second sliding member 80 can be annular, sheet-like, or other shapes. It is understood that compared with metallic materials, non-metallic materials have better damping characteristics. This damping characteristic allows the second non-metallic member to absorb vibrational energy and convert it into heat energy or the energy of internal molecular motion. In addition, some non-metallic materials also have elasticity, which allows the second non-metallic member to absorb vibrational energy through deformation.

[0103] With the above design, the second sliding member 80 can absorb and dissipate a portion of the vibration energy, suppressing the vibration transmission between the planetary transmission mechanism 60 and the housing 40 in the axial direction, thereby further improving the noise and vibration problems of the electric drive device 200. In addition, the setting of the second sliding member 80 allows the planet carrier 62 to have a certain degree of floating freedom along the first direction X, which helps to reduce the uneven load coefficient of the gears in the electric drive device 200, thereby improving the reliability of the transmission system in the electric drive device 200.

[0104] Please refer to Figure 7 and Figure 8 In some embodiments, the second non-metallic component is an annular gasket.

[0105] An annular gasket refers to a thin sheet structure with an annular geometry. Along the second direction Y, the second non-metallic component has a larger dimension to provide a larger coverage area. The dimensions of the second non-metallic component are determined according to assembly requirements. For example, the second non-metallic component is disposed at the end of the bearing housing 621 along the first direction X. The inner and outer diameters of the second non-metallic component can be matched with the inner and outer diameters of the end of the bearing housing 621, respectively, to completely cover the end of the bearing housing 621.

[0106] With the above design, the shape of the second non-metallic part is adapted to the bearing housing 621, which can better absorb the vibration energy generated by the planetary transmission. At the same time, the second non-metallic part can be directly installed on the bearing housing 621 or the bearing ring 41 without the need for additional fixing structure, and the assembly difficulty is low.

[0107] It is understood that in some embodiments, the second non-metallic component may also include a plurality of independent small-sized block-shaped gaskets, which may be spaced apart at the end of the bearing ring 41 or other locations.

[0108] Please refer to Figure 7 and Figure 8 In some embodiments, the bearing housing 621 is sleeved on the outside of the bearing ring 41, one end of the bearing housing 621 along the first direction X abuts against the assembly surface 42, and the second sliding member 80 is disposed between the bearing housing 621 and the assembly surface 42.

[0109] The bearing housing 621 is fitted onto the bearing ring 41, achieving radial positioning through its engagement with the bearing ring 41, while simultaneously suppressing radial vibration transmission via the first sliding member 70. The end of the bearing housing 621 abuts against the mounting surface 42, achieving axial positioning through its engagement with the mounting surface 42, while simultaneously suppressing axial vibration transmission via the second sliding member 80. Understandably, when the second non-metallic component is designed as an annular gasket, it can be directly fitted onto the bearing ring 41, thus fixing the position of the second non-metallic component both axially and radially.

[0110] With the above design, the second non-metallic part is located outside the bearing ring 41, which eliminates the need for a complex alignment structure and reduces assembly difficulty.

[0111] Please refer to Figure 7 and Figure 9 In some embodiments, the bearing housing 621 is sleeved on the outside of the bearing ring 41, the inner wall 422 of the bearing housing 621 is formed with a flange 6211, one end of the bearing ring 41 along the first direction X abuts against the flange 6211, and the second sliding member 80 is disposed between the bearing ring 41 and the flange 6211.

[0112] Along the second direction Y, flange 6211 protrudes from the inner wall 422 of bearing housing 621. The inner diameter of flange 6211 is larger than the outer diameter of bearing ring 41, so that the end face of flange 6211 along the first direction X can abut against the end face of bearing ring 41 along the first direction X. Optionally, the second non-metallic component is designed as an annular gasket, and the inner and outer diameters of the second non-metallic component match the inner and outer diameters of bearing ring 41 to ensure effective isolation between bearing housing 621 and bearing ring 41.

[0113] Understandably, the bearing housing 621 may have two flange structures inside, one of which abuts against the first sliding member 70 and the other against the second sliding member 80.

[0114] The above design enables a more compact assembly structure of the bearing ring 41 and the bearing housing 621, further improving the space utilization efficiency within the housing 40.

[0115] It should be noted that both the first sliding member 70 and the second sliding member 80 include non-metallic parts, which are lighter than traditional metal bearing structures. Therefore, using the first sliding member 70 and the second sliding member 80 to replace the bearing is also beneficial to achieving a lightweight design of the electric drive device 200. In addition, the shape, size and arrangement of the first sliding member 70 and the second sliding member 80 are more flexible. Therefore, this design can also get rid of the limitation of the transmission bearing model and specification, and improve the design flexibility of the electric drive device 200.

[0116] Please refer to Figure 7 , Figure 8 and Figure 9 In some embodiments, the housing 40 is internally configured with two bearing rings 41, and the planetary carrier 62 has bearing seats 621 at both ends along the first direction X. The two bearing seats 621 are respectively rotatably sleeved with the two bearing rings 41.

[0117] For example, a mounting surface 421 is formed inside the housing 40, and the mounting surface 421 is opposite to a portion of the inner wall 422 of the housing 40. A bearing ring 41 is respectively provided on the mounting surface 421 and the inner wall 422 of the housing 40. The two ends of the planetary carrier 62 along the first direction X are fixed to the frame by the assembly structure of the bearing seats 621 and the bearing rings 41. It can be understood that the assembly structure of the two sets of bearing seats 621 and bearing rings 41 can be designed as any of the above embodiments.

[0118] With the above design, both ends of the planetary carrier 62 along the first direction X are fixed to the housing 40, which can improve the smoothness of the planetary transmission mechanism 60 operation and suppress vibration transmission at both ends, thereby further improving noise and vibration problems.

[0119] Please refer to Figure 7 , Figure 8 and Figure 9 In some embodiments, the two bearing housings 621 are coaxially arranged.

[0120] Coaxial configuration means that the central axes of the two bearing rings 41 are completely coincident. Optionally, the two bearing seats 621 can also be coaxially configured with the output shaft 51 of the motor 50.

[0121] By adopting the above design, the two ends of the planetary carrier 62 can maintain a high degree of concentricity during rotation, reducing the sway caused by eccentricity, thereby improving the smoothness of the planetary transmission mechanism 60 operation and helping to further improve noise and vibration problems.

[0122] Understandably, in some other embodiments, depending on the assembly requirements of other components within the electric drive device 200, the two bearing seats 621 of the planetary carrier 62 may also adopt a stepped design, that is, the two bearing seats 621 are spaced apart in the first direction X, while there is a step difference in the second direction Y, forming a stepped structure.

[0123] Please refer to Figure 7 In some embodiments, the electric drive unit 200 further includes a differential 90 disposed inside the housing 40. The differential 90 includes a differential assembly 91 and a differential housing. The differential assembly 91 is disposed inside the differential housing, and the differential housing is integrally disposed with the planetary carrier 62.

[0124] The differential 90 is an important component of the transmission system in the electric drive unit 200. In the vehicle 1000, by setting the differential 90, different rotational speeds can be achieved for the left and right wheels or the front and rear wheels. Differentials can be of various types, such as bevel gear differentials, spur gear differentials, friction plate differentials, etc.

[0125] The differential assembly 91 may include multiple mating gear structures, which are directly or indirectly connected to the planetary transmission mechanism 60 to achieve power transmission and reasonable power distribution.

[0126] A differential housing is a structure that provides housing space and a mounting base for the differential assembly 91. The material of the differential housing may include metal, plastic, or other materials.

[0127] In the above design, on the one hand, by integrating the differential housing with the planetary carrier 62, the connection and assembly gaps between components are reduced, which not only makes the entire device structure more compact, but also reduces the generation of noise and vibration during operation. On the other hand, the integrated design also helps to reduce transmission losses between the planetary transmission mechanism 60 and the differential 90, thereby improving transmission efficiency.

[0128] Understandably, in some other embodiments, the differential 90 may also be designed as a separate structure, and the differential 90 and the planetary transmission mechanism 60 may be connected through, but not limited to, a structure such as an intermediate shaft.

[0129] Please refer to Figure 7 , Figure 8 and Figure 9 In one specific embodiment provided in this application, the electric drive device 200 includes a housing 40, a motor 50, a planetary transmission mechanism 60, a first sliding member 70, a second sliding member 80, and a differential 90.

[0130] The housing 40 includes two interlocking sub-housings 43 and 44. The first sub-housing 43 includes a mounting surface 421 extending into the interior of the housing 40. Bearing rings 41 are respectively disposed on the mounting surface 421 and the inner wall 422 opposite thereto. The two bearing rings 41 extend along a first direction X and are coaxially arranged. The bearing rings 41 can have various shapes and sizes. For example, the bearing ring 41 includes a first segment 411 and a second segment 412 distributed along the first direction X. The end of the first segment 411 away from the second segment 412 is a free end. The outer diameter of the first segment 411 is smaller than the outer diameter of the second segment 412, so as to form a stepped structure on the outside of the bearing ring 41.

[0131] The motor 50 is disposed inside the housing 40. The motor 50 includes an output shaft 51 extending along the first direction X. The output shaft 51 can be coaxially disposed with two bearing rings 41 on the housing 40 and can pass through the mounting hole formed in the center of the bearing rings 41.

[0132] A planetary transmission mechanism 60 is disposed inside the housing 40 and located on one side of the motor 50 along the first direction X. The planetary transmission mechanism 60 includes a transmission assembly 61 and a planet carrier 62. The transmission assembly 61 is connected to the output shaft 51, and the planet carrier 62 is rotatably mounted on the housing 40 and used to fix the transmission assembly 61. The transmission assembly 61 may include a sun gear 611 and a plurality of planet gears 612, wherein the sun gear 611 is located at the center and can be directly mounted on the output shaft 51, and the planet gears 612 are arranged around the sun gear 611 and mesh with the sun gear 611. The planetary carrier 62 includes two ends along the first direction X, and each end is provided with a bearing seat 621. The bearing seat 621 is rotatably sleeved with the bearing ring 41 so that the two ends of the planetary carrier 62 are fixed on the housing 40. The bearing seat 621 can be of various shapes and sizes. For example, the bearing seat 621 can be cylindrical, with both its inner wall 422 and outer wall being flat structures. Another example is that the inner wall 422 of the bearing seat 621 can be provided with a flange 6211 structure. When the bearing seat 621 is sleeved on the outside of the bearing ring 41, the flange 6211 abuts against the end of the bearing ring 41.

[0133] A first sliding member 70 is disposed between the bearing housing 621 and the bearing ring 41 to support the bearing housing 621 radially. The first sliding member 70 includes at least a first non-metallic member, which can have various shapes and sizes. For example, the first non-metallic member can be an annular gasket fitted over the outside of the first segment 411 of the bearing ring 41, with its inner diameter matching the outer diameter of the bearing ring 41 and its outer diameter matching the inner diameter of the bearing housing 621. Alternatively, the first non-metallic member can be an annular gasket disposed at the position of the inner flange 6211 of the bearing housing 621, with its inner and outer diameters matching the inner and outer diameters of the bearing ring 41. The first non-metallic member is made of a non-metallic material, possessing a low coefficient of friction and good self-lubricating properties. The material of the first non-metallic member can be, but is not limited to, polytetrafluoroethylene, polyimide, etc.

[0134] The second sliding member 80 is disposed between the bearing housing 621 and the housing 40, and is used to support the bearing housing 621 axially. The second sliding member 80 includes at least a second non-metallic member, which can be of various shapes and sizes. For example, the second non-metallic member can be an annular gasket disposed between the end of the bearing housing 621 and the mounting surface 42 of the housing 40. The second non-metallic member is also sleeved on the outside of the second end of the bearing ring 41, and the inner and outer diameters of the second non-metallic member match the inner and outer diameters of the bearing housing 621. Alternatively, the second non-metallic member can be an annular gasket disposed between the flange 6211 of the bearing housing 621 and the end of the bearing ring 41, and the inner and outer diameters of the second non-metallic member match the inner and outer diameters of the bearing ring 41. The second non-metallic member is made of a non-metallic material, has a low coefficient of friction and good self-lubricating properties, and the material of the second non-metallic member can be, but is not limited to, polytetrafluoroethylene, polyimide, etc.

[0135] The differential 90 is disposed inside the housing 40 and located on one side of the motor 50 along the first direction X. The differential 90 may include a differential assembly 91 and a differential housing. The differential assembly 91 may include multiple gear structures, which are directly or indirectly connected to the planetary transmission mechanism 60. The differential housing is integrally formed with the planet carrier 62 to provide housing space and a mounting base for the differential assembly 91.

[0136] In the above embodiments, the meshing excitation force generated by the planetary transmission mechanism 60 and the differential 90 during operation can be transmitted to the first sliding member 70 and the second sliding member 80 through the bearing seat 621 of the planetary carrier 62. The first sliding member 70 includes at least a first non-metallic component, and the second sliding member 80 includes at least a second non-metallic component. Based on the damping characteristics and elastic buffering effect of the non-metallic material, the first sliding member 70 can absorb and dissipate a portion of the vibration energy transmitted radially, thereby suppressing the radial vibration transmission. The second sliding member 80 can absorb and dissipate a portion of the vibration energy transmitted axially, thereby suppressing the axial vibration transmission. In this way, by reducing the vibration energy transmitted to the housing 40, the response of the housing 40 can be reduced, thereby improving the noise and vibration problems during the use of the electric drive device 200.

[0137] An embodiment of the second aspect of this application provides an electric drive system, including a battery device 100 and an electric drive device 200 provided in the embodiments of the first aspect, wherein the battery device 100 and the electric drive system are electrically connected.

[0138] The electric drive system provided in this application improves noise and vibration issues by employing the electric drive device 200 provided in the above embodiments, thereby enhancing the performance of the electric drive system.

[0139] An embodiment of the third aspect of this application provides an electrical device, including the electric drive system of the second aspect.

[0140] The electrical equipment provided in this application improves noise and vibration issues by adopting the electric drive system provided in the above embodiments, thereby enhancing the performance of the electric drive device 200.

[0141] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. An electric drive device, characterized by comprising: include: The housing has an internal mounting surface, and a bearing ring is provided on the mounting surface along a first direction; An electric motor is disposed inside the housing, the electric motor including an output shaft extending along the first direction; A planetary transmission mechanism is disposed inside the housing. The planetary transmission mechanism includes a transmission assembly and a planet carrier. The transmission assembly is connected to the output shaft. The planet carrier is used to fix the transmission assembly. One end of the planet carrier has a bearing seat disposed along the first direction. The bearing seat is rotatably sleeved with the bearing ring. There is an assembly gap between the bearing seat and the bearing ring. A first sliding member is disposed within the assembly gap, and the first sliding member includes a first non-metallic component.

2. The electric drive device of claim 1, wherein The first non-metallic component is an annular gasket.

3. The electric drive apparatus according to claim 1, wherein The bearing ring includes a first segment and a second segment distributed along the first direction. The outer diameter of the first segment is smaller than the outer diameter of the second segment. The bearing housing is sleeved on the outside of the bearing ring, and the assembly gap is formed between the bearing housing and the first segment.

4. The electric drive apparatus of claim 3 wherein, Along the first direction, the first slider is spaced apart from the second segment.

5. The electric drive apparatus of claim 3 wherein, Along the second direction, the first non-metallic component protrudes from the second segment, and the second direction is perpendicular to the first direction.

6. The electric drive apparatus of claim 1 wherein, The electric drive device further includes a second sliding member, which is disposed between the bearing seat and the housing along the first direction, and the second sliding member includes a second non-metallic component.

7. The electric drive apparatus of claim 6 wherein, The second non-metallic component is an annular gasket.

8. The electric drive apparatus of claim 6 wherein, The bearing housing is sleeved on the outside of the bearing ring, one end of the bearing housing along the first direction abuts against the assembly surface, and the second sliding member is disposed between the bearing housing and the assembly surface.

9. The electric drive apparatus of claim 6 wherein, The bearing housing is sleeved on the outside of the bearing ring, and a flange is formed on the inner wall of the bearing housing. One end of the bearing ring along the first direction abuts against the flange, and the second sliding member is disposed between the bearing ring and the flange.

10. An electric drive device according to any one of claims 1-9, characterized in that, The housing is internally configured with two bearing rings, and the planetary carrier has bearing seats at both ends along the first direction. The two bearing seats are rotatably sleeved with the two bearing rings respectively.

11. The electric drive apparatus of claim 10 wherein, The electric drive device also includes a differential disposed inside the housing. The differential includes a differential assembly and a differential housing. The differential assembly is disposed inside the differential housing, and the differential housing is integrally disposed with the planetary carrier.

12. An electric drive system, characterized in that, It includes a battery device and an electric drive device as claimed in any one of claims 1-11, wherein the battery device and the electric drive system are electrically connected.

13. An electrical device, characterized by Including the electric drive system as described in claim 12.

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