Electric drive assembly and vehicle

Abstract

The utility model discloses an electric drive assembly and a vehicle. The electric drive assembly is applied to the vehicle and comprises a speed reducer shell, a speed reducer assembly, an oil guide assembly and an oil pumping assembly, and a speed reducer cavity is formed in the speed reducer shell; the speed reducer assembly is arranged in the speed reducer cavity; the oil guide assembly and the speed reducer shell are integrally formed, an oil guide channel is formed in the oil guide piece, and the oil guide channel is partially exposed in the speed reducer cavity and is arranged opposite to the speed reducer assembly; the oil pumping assembly is arranged on the speed reducer shell and connected with the oil guiding channel so as to pump lubricating oil to the speed reducer assembly along the oil guiding channel. According to the implementation mode, the oil guide piece and the speed reducer shell are integrally formed, the oil guide channel is formed, a guide pipe does not need to be additionally arranged, the number of parts in the electric drive assembly is reduced, meanwhile, the oil pumping assembly pumps lubricating oil to the speed reducer assembly along the oil guide channel, active lubrication of the speed reducer assembly is achieved, and the lubrication effect is improved; and the failure risk of the reducer assembly is relieved.

Description

Technical Field

[0001] The present application relates to the technical field of electric drive assemblies, and in particular to an electric drive assembly and a vehicle. Background Art

[0002] With the development of technology, the speed of motors is getting higher and higher. During the development of electric drive assemblies, how to better lubricate the electric drive assemblies has gradually attracted people's attention.

[0003] Currently, passive or active lubrication methods are often used for components in electric drive assemblies. For example, the lubricating oil is thrown onto the bearings through the rotation of the shaft and then lubricated. Passive lubrication has a high risk of insufficient lubrication of components, and the gears easily lose kinetic energy through oil stirring, resulting in reduced rotation efficiency. Alternatively, additional oil injection pipelines are set up for active lubrication. This method requires the installation of more additional conduits, resulting in more parts and occupying a larger space. Utility Model Content

[0004] The main purpose of this application is to provide an electric drive assembly and a vehicle, aiming to solve the above-mentioned technical problems existing in the prior art.

[0005] To solve the above problems, the present application provides an electric drive assembly, which is applied to a vehicle. The electric drive assembly includes: a reducer housing, a reducer assembly, an oil guide assembly and an oil pump assembly. The reducer housing is formed with a reducer cavity; the reducer assembly is arranged in the reducer cavity; the oil guide assembly is integrally formed with the reducer housing, and the oil guide part is formed with an oil guide channel, the oil guide channel is partially exposed in the reducer cavity and is arranged opposite to the reducer assembly; the oil pump assembly is arranged in the reducer housing, and the oil pump assembly is connected to the oil guide channel to pump lubricating oil to the reducer assembly along the oil guide channel.

[0006] In some embodiments, the lubricating oil is at least partially deposited downstream of the reducer cavity in the direction of gravity, and the oil guide channel includes an oil inlet, which is located on the bottom wall of the reducer cavity so that the oil inlet is completely immersed in the lubricating oil when the vehicle is in a horizontal state.

[0007] In some embodiments, when the vehicle is in a horizontal state, the oil inlet is arranged corresponding to the lowest point of the lubricating oil in the direction of gravity.

[0008] In some embodiments, the reducer assembly includes a gear assembly, the oil inlet is spaced apart from the gear assembly, and a dimension of the oil inlet in a direction in which the bottom wall extends is larger than a dimension in a direction toward the gear assembly.

[0009] In some embodiments, the oil guide channel includes a first main path, which is connected to the oil inlet. The electric drive assembly also includes an oil cooler, which is arranged in the reducer housing and is connected to the first main path. The lubricating oil enters the oil cooler through the first main path.

[0010] In some embodiments, the reducer assembly includes an input shaft assembly, the input shaft assembly includes an input shaft and a first bearing, the first bearing is sleeved on the input shaft, and the oil guide channel also includes a second main path, which is respectively connected to the oil cooler and the first bearing to guide at least part of the lubricating oil pumped by the oil pump assembly to the first bearing.

[0011] In some embodiments, the electric drive assembly also includes a motor housing and a motor assembly, the motor housing forms a motor cavity, the motor assembly is at least partially disposed in the motor cavity, and the oil guide channel also includes a first branch, which is respectively connected to the oil cooler and the motor cavity to guide at least part of the lubricating oil pumped by the oil pump assembly to the motor cavity.

[0012] In some embodiments, the motor assembly also includes a motor shaft, which extends into the reducer cavity and is connected to the input shaft, and a gap is provided between the motor shaft and the inner wall of the input shaft. The input shaft assembly also includes a second bearing, which is sleeved on one end of the input shaft close to the motor shaft and is connected to the gap. The input shaft assembly also includes an oil guide pipe, and the input shaft forms an oil guide space. The oil guide pipe is located in the oil guide space and is respectively connected to the second main circuit and the motor shaft to guide at least part of the lubricating oil pumped by the oil pump assembly to the motor shaft and through the gap to the second bearing.

[0013] In some embodiments, the reducer assembly further includes a differential, and the oil guide channel further includes a second branch, which is respectively connected to the oil cooler and the differential to guide at least part of the lubricating oil pumped by the oil pump assembly to the differential.

[0014] To solve the above problems, the present application provides a vehicle, which includes the above-mentioned electric drive assembly.

[0015] Compared with the prior art, the present application provides an electric drive assembly, which is applied to a vehicle. The electric drive assembly includes: a reducer housing, a reducer assembly, an oil guide assembly, and an oil pump assembly. The reducer housing is formed with a reducer cavity; the reducer assembly is arranged in the reducer cavity; the oil guide assembly is integrally formed with the reducer housing, and the oil guide member is formed with an oil guide channel, the oil guide channel is partially exposed in the reducer cavity and is arranged opposite to the reducer assembly; the oil pump assembly is arranged in the reducer housing, and the oil pump assembly is connected to the oil guide channel to pump lubricating oil to the reducer assembly along the oil guide channel. Through the above embodiment, the oil guide member is integrally formed with the reducer housing and forms an oil guide channel, without the need for an additional conduit, reducing the number of parts in the electric drive assembly, and at the same time, the oil pump assembly pumps lubricating oil to the reducer assembly along the oil guide channel, realizing active lubrication of the reducer assembly, improving the lubrication effect, and alleviating the risk of failure of the reducer assembly due to insufficient lubrication. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 is a schematic structural diagram of a vehicle according to one or more embodiments of the present application;

[0018] Figure 2 is a first-view schematic diagram of an electric drive assembly according to one or more embodiments of the present application;

[0019] Figure 3 is a schematic diagram from a second perspective of an electric drive assembly according to one or more embodiments of the present application;

[0020] Figure 4 is based on Figure 3 A cross-sectional view of the electric drive assembly along the AA direction is shown;

[0021] Figure 5 is a schematic diagram from a third perspective of an electric drive assembly according to one or more embodiments of the present application;

[0022] Figure 6 is based on Figure 5 A cross-sectional view of the electric drive assembly along direction BB is shown;

[0023] Figure 7 is a schematic diagram of an electric drive assembly according to one or more embodiments of the present application from a fourth perspective;

[0024] Figure 8 is based on Figure 7 A cross-sectional view of the electric drive assembly along the CC direction is shown;

[0025] Figure 9 is a schematic diagram of an electric drive assembly according to one or more embodiments of the present application from a fifth perspective;

[0026] Figure 10 is based on Figure 9 The cross-sectional view of the electric drive assembly along the DD direction is shown;

[0027] Figure 11 is based on Figure 9 A cross-sectional view of the electric drive assembly along the EE direction is shown;

[0028] Figure 12 is a schematic diagram of an electric drive assembly according to one or more embodiments of the present application from a sixth perspective;

[0029] Figure 13 is based on Figure 12 A cross-sectional view of the electric drive assembly along the FF direction is shown;

[0030] Figure 14 is based on Figure 13 A cross-sectional view of the electric drive assembly shown along the GG direction;

[0031] Figure 15 is a schematic diagram of an electric drive assembly according to one or more embodiments of the present application from a sixth perspective;

[0032] Figure 16 is based on Figure 15 A cross-sectional view of the electric drive assembly along the HH direction is shown;

[0033] Figure 17 is based on Figure 16 Another perspective schematic diagram of the cutaway view of the electric drive assembly shown;

[0034] Figure 18 is a schematic diagram of an electric drive assembly according to one or more embodiments of the present application from a seventh perspective;

[0035] Figure 19 is based on Figure 18 A cross-sectional view of the electric drive assembly shown along direction II;

[0036] Figure 20 is based on Figure 19Another perspective diagram of the cross-sectional view of the electric drive assembly is shown. Reference numerals: vehicle 1; electric drive assembly 2; reducer housing 10; reducer cavity 11; bottom wall 111; return port 12; front housing 13; rear housing 14; reducer assembly 20; gear assembly 21; input shaft assembly 22; input shaft 221; first bearing 222; second bearing 223; oil guide pipe 224; oil guide space 225; differential 23; intermediate shaft assembly 24; output shaft assembly 25; oil guide assembly 30; oil guide passage Channel 31; oil inlet 311; first main channel 312; second main channel 313; first branch channel 314; second branch channel 315; third branch channel 316; fourth branch channel 317; fifth branch channel 318; first oil guide groove 32; second oil guide groove 33; oil spray hole 34; oil pump assembly 40; oil cooler 50; motor housing 60; motor cavity 61; motor assembly 70; motor shaft 71; gap 711; filter 80; gravity direction x1. DETAILED DESCRIPTION

[0037] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0039] In the description of the embodiments of this application, the technical terms "first" and "second" are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly specify the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0040] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0041] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0042] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0043] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0044] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0045] With the development of technology, the speed of motors is getting higher and higher. During the development of electric drive assemblies, how to better lubricate the electric drive assemblies has gradually attracted people's attention.

[0046] Currently, passive or active lubrication methods are often used for components in electric drive assemblies. For example, the lubricating oil is thrown onto the bearings through the rotation of the shaft and then lubricated. Passive lubrication has a high risk of insufficient lubrication of components, and the gears easily lose kinetic energy through oil stirring, resulting in reduced rotation efficiency. Alternatively, additional oil injection pipelines are set up for active lubrication. This method requires the installation of more additional conduits, resulting in more parts and occupying a larger space.

[0047] Please refer to Figure 1 , Figure 1 is a schematic structural diagram of a vehicle according to one or more embodiments of the present application.

[0048] To solve the above problems, this application provides a vehicle, please refer to Figure 1 , Figure 1 is a schematic structural diagram of a vehicle according to one or more embodiments.

[0049] Vehicle 1 can be a fuel-powered vehicle, a gas-powered vehicle, or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle, or an extended-range vehicle. Vehicle 1 can be a front-wheel drive vehicle, a rear-wheel drive vehicle, or a four-wheel drive vehicle. Vehicle 1 is equipped with an electric drive assembly 2, which can be used to provide power to vehicle 1.

[0050] Combine Figure 2-Figure 6 , Figure 2 is a first-view schematic diagram of an electric drive assembly according to one or more embodiments of the present application; Figure 3 is a schematic diagram from a second perspective of an electric drive assembly according to one or more embodiments of the present application; Figure 4 is based on Figure 3 A cross-sectional view of the electric drive assembly along the AA direction is shown;

[0051] Figure 5 is a schematic diagram from a third perspective of an electric drive assembly according to one or more embodiments of the present application; Figure 6 is based on Figure 5 The cross-sectional view of the electric drive assembly along the BB direction is shown.

[0052] To solve the above problems, the present application provides an electric drive assembly 2, which is applied to a vehicle 1. The electric drive assembly 2 includes: a reducer housing 10, a reducer assembly 20, an oil guide assembly 30 and an oil pump assembly 40. The reducer housing 10 is formed with a reducer cavity 11; the reducer assembly 20 is arranged in the reducer cavity 11; the oil guide assembly 30 is integrally formed with the reducer housing 10, and the oil guide part is formed with an oil guide channel 31, and the oil guide channel 31 is partially exposed in the reducer cavity 11 and is arranged opposite to the reducer assembly 20; the oil pump assembly 40 is arranged in the reducer housing 10, and the oil pump assembly 40 is connected to the oil guide channel 31 to pump lubricating oil to the reducer assembly 20 along the oil guide channel 31.

[0053] The reducer housing 10 forms a reducer cavity 11, and the reducer assembly 20 is arranged in the reducer cavity 11. The reducer housing 10 can provide support and protection for the reducer assembly 20. The oil guide assembly 30 is integrally cast with the reducer housing 10 and forms an oil guide channel 31. The oil guide channel 31 is used to guide the lubricating oil pumped by the oil pump assembly 40. Exemplarily, the oil guide assembly 30 can be integrally formed on the inner wall surface or outer wall surface of the reducer housing 10. The oil pump assembly 40 can include an oil pump and an oil pumping pipeline. The oil pump assembly can be connected to the oil guide channel 31 through the oil pump and the oil pumping pipeline. The oil pump assembly 40 can absorb and pump the lubricating oil through the oil guide channel 31, and further pump the lubricating oil to the reducer assembly 20 along the oil guide channel 31. The oil guide channel 31 is partially exposed in the reducer cavity 11 and is arranged opposite to the reducer assembly 20. It can be understood that the lubricating oil is pumped along the oil guide channel 31. At least part of the lubricating oil exits the oil guide channel 31 at the part of the oil guide channel 31 exposed in the reducer cavity 11 during the process of being pumped along the oil guide channel 31, and contacts the reducer assembly 20, thereby lubricating the reducer assembly 20.

[0054] Through the above-mentioned embodiment, the oil guide part is integrally formed with the reducer housing 10 to form an oil guide channel 31. There is no need to set up an additional conduit, which reduces the number of parts in the electric drive assembly 2. At the same time, the oil pumping assembly 40 pumps lubricating oil to the reducer assembly 20 along the oil guide channel 31, thereby realizing active lubrication of the reducer assembly 20, improving the lubrication effect, and alleviating the risk of failure of the reducer assembly 20 due to insufficient lubrication.

[0055] In some embodiments, lubricating oil is at least partially deposited downstream of the reducer cavity 11 in the direction of gravity x1. The oil guide channel 31 includes an oil inlet 311 located on the bottom wall 111 of the reducer cavity 11, such that the oil inlet 311 is completely submerged in the lubricating oil when the vehicle 1 is horizontal. It is understood that, under the influence of gravity, the lubricating oil within the reducer cavity 11 will be deposited downstream of the reducer cavity 11 in the direction of gravity x1, such as at the bottom of the reducer cavity 11. The oil guide channel 31 includes the oil inlet 311, through which lubricating oil can enter the oil guide channel 31 and the oil pump assembly 40. For example, the oil pump assembly 40 can generate negative pressure in the oil guide channel 31 between the oil inlet 311 and the oil pump assembly 40 to draw lubricating oil through the oil inlet 311. The bottom wall 111 of the reducer cavity 11 can refer to the inner wall surface of the reducer housing 10 located downstream in the direction of gravity x1 when the vehicle 1 is horizontal. The oil inlet 311 is located on the bottom wall 111 of the reducer cavity 11, allowing lubricating oil to more easily settle there. Consequently, when the vehicle 1 is horizontal, the oil inlet 311 is completely submerged in the lubricating oil. This means that the entire oil inlet 311 is below the lubricating oil level. This reduces the risk of air suction at the oil inlet 311, resulting in insufficient lubricating oil in the oil guide channel 31 and, consequently, insufficient lubrication of the reducer assembly 20.

[0056] In some embodiments, when the vehicle 1 is horizontal, the oil inlet 311 is positioned to correspond to the lowest point of the lubricating oil in the direction of gravity x1. This means that at least a portion of the oil inlet 311 coincides with the lowest point at which the lubricating oil can reach. It is understood that the lowest point of the lubricating oil in the direction of gravity x1 is where the lubricating oil is most likely to settle. Positioning the oil inlet 311 at this location helps further increase the oil throughput of the oil inlet 311 and reduces the risk of air suction at the oil inlet 311. It should be noted that the vehicle 1 may be in an inclined posture due to uphill or downhill conditions during driving, and the lubricating oil level in the reducer cavity 11 may also change relative to the reducer housing 10. If the oil inlet 311 is located at other positions, for example, in the middle section of the reducer cavity 11 in the gravity direction x1, when the vehicle 1 is in an inclined state, there is a higher risk that the oil inlet 311 is partially or completely above the lubricating oil level. Compared with this method, the oil inlet 311 is set at the lowest point of the lubricating oil in the gravity direction x1 when the vehicle 1 is horizontal. The risk of the oil inlet 311 being completely above the lubricating oil level when the vehicle 1 is inclined is lower, thereby improving the stability of the oil inlet 311 in absorbing lubricating oil and reducing the risk of air suction at the oil inlet 311.

[0057] In some embodiments, the reducer assembly 20 includes a gear assembly 21, with an oil inlet 311 spaced apart from the gear assembly 21. The dimension of the oil inlet 311 in the direction in which the bottom wall 111 extends is larger than the dimension in the direction toward the gear assembly 21. The gear assembly 21 may include one or more gears, each of which is rotatable along its axis of rotation. It should be noted that, when rotating, the gears are partially below the lubricating oil level and agitate the lubricating oil. The resistance that the gears must overcome to agitate the lubricating oil is positively correlated with the depth to which the gears are immersed in the lubricating oil. When the oil inlet 311 needs to be completely immersed, the larger the size of the oil inlet 311 in the direction toward the gear assembly 21, the greater the depth of the required lubricating oil. When the opening area of ​​the oil inlet 311 is the same, compared with the way that the size of the oil inlet 311 in the direction extending from the bottom wall 111 is less than or equal to the size in the direction toward the gear assembly 21, the size of the oil inlet 311 in the direction extending from the bottom wall 111 is greater than the size in the direction toward the gear assembly 21. The liquid level of the lubricating oil required to completely immerse the oil inlet 311 is lower, thereby facilitating the reduction of the liquid level of the lubricating oil, reducing the amount of lubricating oil injected, saving costs, and reducing the resistance of the lubricating oil to the gears. It also reduces the energy lost by the gear assembly 21 stirring the lubricating oil, improves the transmission efficiency of the gear assembly 21, and thus reduces the cost of use. In some application scenarios, the shape of the oil inlet 311 can be set in accordance with the shape of the reducer housing 10.

[0058] In some embodiments, the oil guide channel 31 includes a first main path 312, which is connected to the oil inlet 311. The electric drive assembly 2 also includes an oil cooler 50, which is arranged in the reducer housing 10. The oil cooler 50 is connected to the first main path 312, and the lubricating oil enters the oil cooler 50 through the first main path 312. The oil cooler 50 can be arranged in the reducer housing 10. For example, the oil cooler 50 can be arranged on the outer wall of the reducer housing 10. It is connected to the oil guide channel 31 through the first main path 312. The oil cooler 50 is used to receive lubricating oil from the first main path 312 and cool the lubricating oil. As a result, it is convenient to guide the lubricating oil to the oil cooler 50 for cooling through the first main path 312, thereby improving the lubricating and cooling effect of the lubricating oil on the reducer assembly 20. In some application scenarios, the oil pump assembly 40 is disposed on the first main path 312. For example, the first main path 312 includes a first section and a second section spaced apart from each other, the first section being connected to the oil inlet 311, and the second section being connected to the oil cooler 50. The oil pump assembly 40 is connected to the first section and the second section, respectively, so that the oil pump assembly 40 can draw lubricating oil from the oil inlet 311 through the first section and pump it to the oil cooler 50 through the second section. In some other embodiments, the electric drive assembly 2 further includes a filter 80, which is disposed between the oil cooler 50 and the oil pump assembly 40. The filter 80 can filter the lubricating oil to remove impurities such as iron filings and dust that may be present in the lubricating oil.

[0059] In some embodiments, the speed reducer assembly 20 further includes a differential 23, and the oil guide passage 31 further includes a second branch 315. The second branch 315 is in communication with the oil cooler 50 and the differential 23, respectively, to guide at least a portion of the lubricating oil pumped by the oil pump assembly 40 to the differential 23. The differential 23 is used to enable the left and right (or front and rear) drive wheels of the vehicle 1 to rotate at different speeds. The second branch 315 is in communication with the oil cooler 50 and the differential 23, respectively, so that at least a portion of the lubricating oil cooled by the oil cooler 50 is directly sprayed into the differential 23 through the second branch 315 under the pressure applied by the oil pump assembly 40, thereby achieving active lubrication of the differential 23, facilitating sufficient lubrication of the differential 23, and improving the lubrication effect of the differential 23. Furthermore, the need for additional oil guide pipes 224 is eliminated, saving costs.

[0060] Combine Figure 7-14 , Figure 7 is a schematic diagram of an electric drive assembly according to one or more embodiments of the present application from a fourth perspective; Figure 8 is based on Figure 7 A cross-sectional view of the electric drive assembly along the CC direction is shown; Figure 9 is a schematic diagram of an electric drive assembly according to one or more embodiments of the present application from a fifth perspective;

[0061] Figure 10 is based on Figure 9 The cross-sectional view of the electric drive assembly along the DD direction is shown; Figure 11 is based on Figure 9 A cross-sectional view of the electric drive assembly along the EE direction is shown; Figure 12 is a schematic diagram of an electric drive assembly according to one or more embodiments of the present application from a sixth perspective; Figure 13 is based on Figure 12 A cross-sectional view of the electric drive assembly along the FF direction is shown; Figure 14 is based on Figure 13 The cross-sectional view of the electric drive assembly along the GG direction is shown.

[0062] In some embodiments, the reducer assembly 20 includes an input shaft assembly 22, which includes an input shaft 221 and a first bearing 222. The first bearing 222 is sleeved on the input shaft 221. The oil guide channel 31 also includes a second main path 313, which is connected to the oil cooler 50 and the first bearing 222, respectively, to guide at least a portion of the lubricating oil pumped by the oil pump assembly 40 to the first bearing 222. The input shaft 221 can be the input shaft of the reducer. The first bearing 222 can be, for example, a ball bearing, a cylindrical roller bearing, a tapered roller bearing, or a needle bearing. The first bearing 222 is sleeved on the input shaft 221 and can be used to reduce friction during the rotation of the input shaft 221 and to support the input shaft 221. The second main path 313 is connected to the oil cooler 50 and the first bearing 222 respectively, so that at least part of the lubricating oil cooled by the oil cooler 50 is directly sprayed to the first bearing 222 through the second main path 313 under the pressure applied by the oil pump assembly 40, thereby realizing active lubrication of the first bearing 222, facilitating full lubrication of the first bearing 222, improving the lubrication effect of the first bearing 222, and at the same time, eliminating the need to set up an additional oil guide pipe 224, thereby saving costs.

[0063] In some embodiments, the electric drive assembly 2 further includes a motor housing 60 and a motor assembly 70. The motor housing 60 defines a motor cavity 61, with the motor assembly 70 at least partially disposed within the motor cavity 61. The oil guide passage 31 further includes a first branch 314, which communicates with the oil cooler 50 and the motor cavity 61, respectively, to guide at least a portion of the lubricating oil pumped by the oil pump assembly 40 to the motor cavity 61. The motor housing 60 defines the motor cavity 61, with the motor assembly 70 at least partially disposed within the motor cavity 61. The motor housing 60 can provide support and protection for the motor assembly 70 within the motor cavity 61. The motor assembly 70 can include a motor stator, a motor rotor, and the like. The motor cavity 61 can communicate with the reducer cavity 11. For example, the motor housing 60 is disposed adjacent to the reducer housing 10, and through-holes are formed on the opposing major surfaces of the reducer housing 10 and the motor housing 60, connecting the motor cavity 61 and the reducer cavity 11 via the through-holes. The first branch 314 is connected to the oil cooler 50 and the motor cavity 61 respectively, so that at least a portion of the lubricating oil cooled by the oil cooler 50 enters the motor cavity 61 through the first branch 314 under the pressure applied by the oil pump assembly 40 and is directly sprayed into the motor assembly 70, thereby achieving active lubrication of the motor assembly 70, facilitating full lubrication of the motor assembly 70, improving the lubrication effect of the motor assembly 70, and at the same time eliminating the need for an additional oil guide pipe 224, thereby saving costs. In some application scenarios, the reducer housing 10 is provided with a return port 12, which is connected to the motor cavity 61, so that the lubricating oil in the motor cavity 61 can flow back into the reducer cavity 11 through the return port 12, thereby achieving circulating lubrication of the lubricating oil.

[0064] In some embodiments, the motor assembly 70 also includes a motor shaft 71, which extends into the reducer cavity 11 and is connected to the input shaft 221, and a gap 711 is provided between the motor shaft 71 and the inner wall of the input shaft 221. The input shaft assembly 22 also includes a second bearing 223, which is sleeved on one end of the input shaft 221 close to the motor shaft 71 and is connected to the gap 711. The input shaft assembly 22 also includes an oil guide pipe 224, and the input shaft 221 forms an oil guide space 225. The oil guide pipe 224 is located in the oil guide space 225 and is respectively connected to the second main path 313 and the motor shaft 71 to guide at least part of the lubricating oil pumped by the oil pump assembly 40 to the motor shaft 71 and through the gap 711 to the second bearing 223. Driven by the motor rotor, the motor shaft 71 can rotate about its axis, thereby providing power to the input shaft 221. The motor shaft 71 is connected to the input shaft 221, and the connection method can be a key connection, etc., so that the motor shaft 71 and the input shaft 221 can drive the input shaft 221 to rotate about its axis. The second bearing 223 can be, for example, a ball bearing, a cylindrical roller bearing, a tapered roller bearing, or a needle bearing. The second bearing 223 is mounted on the end of the input shaft 221 closest to the motor shaft 71 and is connected to the gap 711. The oil guide tube 224 is disposed within the oil guide space 225 formed by the input shaft 221 and communicates with the second main passage 313 and the motor shaft 71, respectively. This allows at least a portion of the lubricating oil pumped by the oil pump assembly 40 to sequentially pass through the second main passage 313 and the oil guide tube 224 to the gap 711 between the motor shaft 71 and the input shaft 221, thereby actively lubricating the motor shaft 71 and the input shaft 221. The oil guide tube 224 then passes through the gap 711 to the second bearing 223, thereby actively lubricating the second bearing 223. This facilitates sufficient lubrication of the motor shaft 71 and the second bearing 223, thereby improving the lubrication effect on the motor shaft 71 and the second bearing 223.

[0065] Combine Figures 15-20 , Figure 15 is a schematic diagram of an electric drive assembly according to one or more embodiments of the present application from a sixth perspective; Figure 16 is based on Figure 15 A cross-sectional view of the electric drive assembly along the HH direction is shown; Figure 17 is based on Figure 16 Another perspective schematic diagram of the cutaway view of the electric drive assembly shown;

[0066] Figure 18 is a schematic diagram of an electric drive assembly according to one or more embodiments of the present application from a seventh perspective;

[0067] Figure 19 is based on Figure 18 A cross-sectional view of the electric drive assembly shown along direction II; Figure 20 is based on Figure 19A schematic diagram of a cutaway view of the electric drive assembly shown from another perspective.

[0068] In some embodiments, the reducer housing 10 includes a front housing 13 and a rear housing 14, which are relatively covered to form a reducer cavity 11. The reducer assembly 20 also includes an intermediate shaft assembly 24. The oil guide assembly 30 is formed with a first oil guide groove 32 on the front housing 13, which is recessed compared to the rear housing 14. The intermediate shaft assembly 24 is at least partially stuck in the first oil guide groove 32. The oil guide channel 31 also includes a third branch 316, which is respectively connected to the second main channel 313 and the first oil guide groove 32 to guide at least part of the lubricating oil pumped by the oil pump assembly 40 into the first oil guide groove 32. Thus, third branch 316 allows at least a portion of the lubricating oil cooled by oil cooler 50 to be directly injected into first oil guide groove 32 through third branch 316 under the pressure applied by oil pump assembly 40, thereby lubricating intermediate shaft assembly 24 within first oil guide groove 32. This actively lubricates intermediate shaft assembly 24, improving the lubrication efficiency of intermediate shaft assembly 24 while eliminating the need for additional oil guide pipes 224, thereby saving costs. In some applications, reducer assembly 20 further includes an output shaft assembly 25, which is spaced apart from first oil guide groove 32. Oil guide passage 31 further includes fourth branch 317, which connects first oil guide groove 32 and output shaft assembly 25, respectively, to guide at least a portion of the lubricating oil pumped by oil pump assembly 40 to output shaft assembly 25, thereby actively lubricating output shaft assembly 25.

[0069] In some embodiments, the oil guide assembly 30 has a second oil guide groove 33 formed on the rear housing 14 that is recessed relative to the front housing 13. The intermediate shaft assembly 24 is partially disposed within the second oil guide groove 33. The oil guide assembly 30 also has an oil spray hole 34 that connects the second main passage 313 and the second oil guide groove 33, respectively, to guide at least a portion of the lubricating oil pumped by the oil pump assembly 40 into the second oil guide groove 33. Thus, the oil spray hole 34 allows at least a portion of the lubricating oil cooled by the oil cooler 50 to be directly sprayed into the second oil guide groove 33 through the oil spray hole 34 under pressure applied by the oil pump assembly 40. This oil spray hole 34 lubricates the intermediate shaft assembly 24 within the second oil guide groove 33, thereby actively lubricating the intermediate shaft assembly 24 in cooperation with the first oil guide groove 32, thereby improving the lubrication effect of the intermediate shaft assembly 24. In some application scenarios, the oil guide channel 31 also includes a fifth branch 318, which is respectively connected to the second oil guide groove 33 and the output shaft assembly 25 to guide at least part of the lubricating oil pumped by the oil pump assembly 40 to the output shaft assembly 25, thereby cooperating with the fourth main line to improve the lubrication effect on the output shaft assembly 25.

[0070] To sum up, the electric drive assembly 2 provided in the present application is applied to the vehicle 1, and the electric drive assembly 2 includes: a reducer housing 10, a reducer assembly 20, an oil guide assembly 30 and an oil pump assembly 40. The reducer housing 10 is formed with a reducer cavity 11; the reducer assembly 20 is arranged in the reducer cavity 11; the oil guide assembly 30 is integrally formed with the reducer housing 10, and the oil guide part is formed with an oil guide channel 31, and the oil guide channel 31 is partially exposed in the reducer cavity 11 and is arranged opposite to the reducer assembly 20; the oil pump assembly 40 is arranged in the reducer housing 10, and the oil pump assembly 40 is connected to the oil guide channel 31 to pump lubricating oil to the reducer assembly 20 along the oil guide channel 31. Through the above-mentioned embodiment, the oil guide part is integrally formed with the reducer housing 10 to form an oil guide channel 31. There is no need to set up an additional conduit, which reduces the number of parts in the electric drive assembly 2. At the same time, the oil pumping assembly 40 pumps lubricating oil to the reducer assembly 20 along the oil guide channel 31, thereby realizing active lubrication of the reducer assembly 20, improving the lubrication effect, and alleviating the risk of failure of the reducer assembly 20 due to insufficient lubrication.

[0071] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. An electric drive assembly, characterized in that: Applied to a vehicle, the electric drive assembly includes: A reducer housing is formed with a reducer cavity; A reducer assembly is disposed in the reducer cavity; An oil guide assembly, the oil guide assembly being integrally formed with the reducer housing, the oil guide assembly being formed with an oil guide channel, the oil guide channel being partially exposed in the reducer cavity and being arranged opposite to the reducer assembly; An oil pump assembly is provided in the reducer housing and is connected to the oil guide channel to pump lubricating oil to the reducer assembly along the oil guide channel.

2. The electric drive assembly according to claim 1, characterized in that: The lubricating oil is at least partially deposited downstream of the reducer cavity in the gravity direction, and the oil guide channel includes an oil inlet, which is located on the bottom wall of the reducer cavity so that the oil inlet is completely immersed in the lubricating oil when the vehicle is in a horizontal state.

3. The electric drive assembly according to claim 2, characterized in that: When the vehicle is in a horizontal state, the oil inlet is arranged corresponding to the lowest point of the lubricating oil in the direction of gravity.

4. The electric drive assembly according to claim 2, characterized in that: The reducer assembly includes a gear assembly. The oil inlet is spaced apart from the gear assembly. The size of the oil inlet in the direction in which the bottom wall extends is larger than the size in the direction toward the gear assembly.

5. The electric drive assembly according to claim 2, characterized in that: The oil guide channel includes a first main path, which is connected to the oil inlet. The electric drive assembly also includes an oil cooler, which is arranged in the reducer housing and is connected to the first main path. The lubricating oil enters the oil cooler through the first main path.

6. The electric drive assembly according to claim 5, characterized in that: The reducer assembly includes an input shaft assembly, which includes an input shaft and a first bearing. The first bearing is sleeved on the input shaft. The oil guide channel also includes a second main path, which is respectively connected to the oil cooler and the first bearing to guide at least part of the lubricating oil pumped by the oil pump assembly to the first bearing.

7. The electric drive assembly according to claim 6, characterized in that: The electric drive assembly also includes a motor housing and a motor assembly, the motor housing forms a motor cavity, and the motor assembly is at least partially disposed in the motor cavity. The oil guide channel also includes a first branch, which is respectively connected to the oil cooler and the motor cavity to guide at least part of the lubricating oil pumped by the oil pump assembly to the motor cavity.

8. The electric drive assembly according to claim 7, characterized in that: The motor assembly also includes a motor shaft, which extends into the reducer cavity and is connected to the input shaft, and a gap is provided between the motor shaft and the inner wall of the input shaft. The input shaft assembly also includes a second bearing, which is sleeved on one end of the input shaft close to the motor shaft and communicated with the gap. The input shaft assembly also includes an oil guide pipe, and the input shaft forms an oil guide space. The oil guide pipe is located in the oil guide space and is respectively communicated with the second main path and the motor shaft to guide at least part of the lubricating oil pumped by the oil pump assembly to the motor shaft and through the gap to the second bearing.

9. The electric drive assembly according to claim 5, characterized in that: The reducer assembly further includes a differential, and the oil guide passage further includes a second branch, which is respectively connected to the oil cooler and the differential to guide at least part of the lubricating oil pumped by the oil pump assembly to the differential.

10. A vehicle, characterized in that: The vehicle comprises the electric drive assembly according to any one of claims 1 to 9.

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