Electric drive assembly and vehicle with same

Abstract

The utility model discloses an electric drive assembly and a vehicle with the electric drive assembly, and relates to the technical field of vehicles, and the electric drive assembly comprises a shell, a drive assembly, a mechanical pump and an electronic pump. The driving assembly comprises a motor, a speed reducer assembly and a differential assembly which are arranged in the shell, and the speed reducer assembly is in transmission connection with an output shaft of the motor and the differential assembly; the mechanical pump and the electronic pump are both arranged in the shell, the mechanical pump is in transmission connection with the speed reducer assembly or the differential mechanism assembly, and the mechanical pump and the electronic pump are jointly used for driving oil in the shell to flow to the driving assembly. According to the electric drive assembly provided by the utility model, the cooling and lubricating effects under the working conditions of high rotating speed and high load can be improved, the power of an electronic pump is effectively reduced, and the stability and the reliability of the electric drive assembly are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, in particular to an electric drive assembly and a vehicle having the same. Background Art

[0002] In the related technology, in order to reduce the wear and thermal shock of the electric drive assembly, the vehicle is generally equipped with a cooling and lubrication system. The existing cooling and lubrication system pumps oil to the electric drive assembly through an electronic pump. However, under high-speed and high-load conditions, the cooling and lubrication effects of the electric drive assembly are not good, and the single pump design affects the stability and reliability of the electric drive assembly. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes an electric drive assembly, which can improve the cooling and lubrication effect under high speed and high load conditions, effectively reduce the power of the electronic pump, and improve the stability and reliability of the electric drive assembly.

[0004] The utility model also provides a vehicle, which comprises the above-mentioned electric drive assembly.

[0005] The electric drive assembly according to the embodiment of the utility model includes: a housing, a drive assembly, a mechanical pump and an electronic pump. The drive assembly includes a motor, a reducer assembly and a differential assembly arranged in the housing, and the reducer assembly is respectively connected to the output shaft of the motor and the differential assembly in a driving manner; the mechanical pump and the electronic pump are both arranged in the housing, and the mechanical pump is connected to the reducer assembly or the differential assembly in a driving manner, and the mechanical pump and the electronic pump are used together to drive the oil in the housing to flow to the drive assembly.

[0006] According to the electric drive assembly of the embodiment of the utility model, the mechanical pump is connected to the reducer assembly or differential assembly of the drive assembly, and the mechanical pump and the electronic pump are used together to drive the oil to flow to the drive assembly. When the drive assembly is running, the mechanical pump can automatically adjust the pump oil flow according to the motor speed to improve the cooling and lubrication effect of the electric drive assembly under high speed and high load conditions. At the same time, the mechanical pump can effectively reduce the power of the electronic pump, thereby achieving energy saving. When either the mechanical pump or the electronic pump fails or fails, the other can take over, thereby avoiding the interruption of the oil pumping and causing the failure of the lubrication and cooling functions, which can effectively improve the stability and reliability of the electric drive assembly.

[0007] According to some embodiments of the utility model, the reducer assembly includes a main shaft assembly and a secondary shaft assembly that are meshed with each other, the main shaft assembly is drivingly connected to the output shaft of the motor, the secondary shaft assembly is drivingly connected to the differential assembly, and the input shaft of the mechanical pump is drivingly connected to the secondary shaft assembly.

[0008] In some embodiments of the present invention, the secondary shaft assembly includes a rotating shaft, the input shaft of the mechanical pump is connected to the rotating shaft and rotates synchronously, and the mechanical pump is located on one of the two sides of the secondary shaft assembly in the axial direction and is coaxially arranged with the rotating shaft.

[0009] In some embodiments of the present invention, the secondary shaft assembly includes a speed gear, which is meshed with the main shaft assembly or the differential assembly. The input shaft of the mechanical pump is connected to a first pump wheel, which is drivingly connected to the speed gear.

[0010] According to some embodiments of the present utility model, the differential assembly includes a differential gear, the differential gear is meshed with the reducer assembly, the input shaft of the mechanical pump is connected to a second pump wheel, and the second pump wheel is drivingly connected to the differential gear.

[0011] According to some embodiments of the present utility model, the electric drive assembly further includes a lubrication pipeline, the mechanical pump and the electronic pump are used to pump oil into the lubrication pipeline, and the lubrication pipeline is used to transport the oil to the drive component.

[0012] In some embodiments of the utility model, the lubrication pipeline includes a main circuit and multiple branches, and the electronic pump and the mechanical pump pump oil to the main circuit simultaneously; the multiple branches are respectively connected to the main circuit, and are used to output oil to at least one of the motor, the reducer assembly and the differential assembly respectively.

[0013] In some embodiments of the utility model, the main flow is connected with a filter and an oil cooler in sequence, the filter is used to filter impurities in the oil, and the oil cooler is used to cool the oil. Along the flow direction of the oil, the filter and the oil cooler are located upstream of the multiple branches.

[0014] In some embodiments of the utility model, the reducer assembly includes a rotating shaft and a plurality of reducer bearings, the reducer bearings are arranged at both ends of the rotating shaft in the axial direction and are used to support the rotating shaft, the branch includes a first branch, one end of the first branch is connected to the main flow, and the other end extends to the reducer assembly and is used to output oil to the reducer bearings.

[0015] In some embodiments of the utility model, a first bearing is sleeved on the output shaft of the motor, the first bearing is located at one end of the motor close to the reducer assembly, the branch includes a second branch, one end of the second branch is connected to the main flow, and the other end extends to the first bearing for outputting oil to the first bearing.

[0016] In some embodiments of the utility model, the motor includes an output shaft, a stator and a rotor, the output shaft has a channel extending in the axial direction of the output shaft, the peripheral wall of the channel has an oil outlet hole, the rotor is sleeved outside the output shaft, the oil outlet hole passes through the peripheral walls of the output shaft and the rotor, the stator ring is arranged outside the rotor, the branch includes a third branch and a fourth branch, the third branch is arranged outside the motor and extends in the axial direction of the motor, and is used to output oil to the stator; the fourth branch is connected to one end of the channel along the axial direction of the output shaft, and is used to output oil to the rotor through the oil outlet hole.

[0017] In some embodiments of the utility model, a first sub-flow path and a second sub-flow path are provided at both axial ends of the stator, the first sub-flow path and the second sub-flow path are both arranged in a ring outside the stator, the third branch is connected to the first sub-flow path or the second sub-flow path, and an oil channel is also provided on the stator, the oil channel extends along the axial direction of the stator, and the oil channels are multiple and spaced apart along the circumferential direction of the stator, and the first sub-flow path and the second sub-flow path are respectively connected through multiple oil channels.

[0018] In some embodiments of the utility model, a second bearing is sleeved on the output shaft of the motor, the second bearing is located at the end of the motor away from the reducer assembly, and one end of the third branch along the axial direction of the motor is connected to a third sub-flow path, and the third sub-flow path is used to output oil to the second bearing.

[0019] In some embodiments of the utility model, the lubrication pipeline includes a first flow path and a second flow path, the first flow path and the second flow path are independent of each other, the mechanical pump is used to pump oil to the first flow path, and the electronic pump is used to pump oil to the second flow path, and the first flow path and the second flow path are used together to transport oil to the drive component.

[0020] In some embodiments of the present invention, the first flow path and the second flow path transport oil to different parts of the drive assembly.

[0021] In some embodiments of the utility model, the motor includes an output shaft and a rotor, the output shaft has a channel extending in the axial direction of the output shaft, the peripheral wall of the channel has an oil outlet hole, the rotor is sleeved outside the output shaft, the oil outlet hole passes through the peripheral walls of the output shaft and the rotor, the first flow path includes a first oil circuit, the mechanical pump is used to pump oil to the first oil circuit, the first oil circuit is connected to one end of the channel along the axial direction of the output shaft, and is used to output oil to the rotor through the oil outlet hole.

[0022] In some embodiments of the utility model, the second flow path includes a second oil circuit and multiple sub-circuits, and the electronic pump is used to pump oil to the second oil circuit; the multiple sub-circuits are respectively connected to the second oil circuit, and are used to output oil to the reducer assembly, the differential assembly, and the stator and bearings of the motor respectively.

[0023] A vehicle according to an embodiment of the utility model includes: the above-mentioned electric drive assembly.

[0024] According to the vehicle of the embodiment of the utility model, the mechanical pump is connected to the reducer assembly or differential assembly of the drive assembly by driving, and the mechanical pump and the electronic pump are used together to drive the oil to flow to the drive assembly. When the drive assembly is running, the mechanical pump can automatically adjust the pump oil flow according to the motor speed to improve the cooling and lubrication effect of the electric drive assembly under high speed and high load conditions. At the same time, the mechanical pump can effectively reduce the power of the electronic pump, thereby achieving energy saving. When either the mechanical pump or the electronic pump fails or fails, the other can take over, thereby avoiding the interruption of the oil pumping and causing the failure of the lubrication and cooling functions, which can effectively improve the stability and reliability of the electric drive assembly.

[0025] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0027] Figure 1 is a schematic diagram of an electric drive assembly according to an embodiment of the utility model;

[0028] Figure 2 is a schematic diagram of an electric drive assembly according to an embodiment of the utility model from another perspective;

[0029] Figure 3 is a schematic diagram of a drive component of an electric drive assembly according to an embodiment of the utility model;

[0030] Figure 4 It is a schematic diagram of a drive component and a mechanical pump of an electric drive assembly according to an embodiment of the utility model, wherein the mechanical pump is drivingly connected to the reducer component;

[0031] Figure 5 It is a schematic diagram of a drive assembly and a mechanical pump of an electric drive assembly according to an embodiment of the utility model, wherein the mechanical pump is drivingly connected to the differential assembly;

[0032] Figure 6is a schematic diagram of a lubrication pipeline of an electric drive assembly according to an embodiment of the utility model, wherein the lubrication pipeline includes a main pipeline and a plurality of branch pipelines;

[0033] Figure 7 is a schematic diagram of a lubrication pipeline of an electric drive assembly according to an embodiment of the utility model, wherein the lubrication pipeline includes a first flow path and a second flow path that are independent of each other;

[0034] Figure 8 It is a schematic diagram of the transmission connection between the reducer assembly and the mechanical pump of the drive assembly of the electric drive assembly according to an embodiment of the utility model;

[0035] Fig. 9 is along Figure 8 Section view along line AA.

[0036] Reference numerals:

[0037] 100. Electric drive assembly;

[0038] 10. Drive components;

[0039] 1. Motor; 11. Output shaft; 12. Stator; 13. Rotor; 131. Oil outlet hole; 14. First bearing; 15. Second bearing; 16. Oil injection ring;

[0040] 2. Reducer assembly; 21. Main shaft assembly; 211. Third gear; 22. Secondary shaft assembly; 221. Rotating shaft; 222. Speed ​​change gear; 223. First gear; 224. Second gear; 23. Reducer bearing;

[0041] 3. Differential assembly; 31. Differential gear;

[0042] 4. Mechanical pump; 41. Rotating mechanism; 42. Oil suction chamber; 43. Oil discharge chamber;

[0043] 5. Electronic pump;

[0044] 6, lubrication pipeline; 61, main flow; 62, branch; 621, first branch; 622, second branch; 623, third branch; 624, fourth branch; 625, first sub-flow; 626, second sub-flow; 627, oil channel; 628, third sub-flow; 63, first flow; 631, first oil circuit; 64, second flow; 641, second oil circuit; 642, sub-flow;

[0045] 71. Filter; 72. Oil cooler; 73. Second pump wheel; 74. Connecting shaft; 741. Spline. DETAILED DESCRIPTION

[0046] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0047] In the description of the present utility model, it is necessary to understand that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying 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 present utility model. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0048] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] Reference below Figure 1-Figure 9 An electric drive assembly 100 according to an embodiment of the present invention is described.

[0050] like Figure 1 and Figure 2 As shown, the electric drive assembly 100 according to the embodiment of the present utility model includes a housing, a drive component 10 , a mechanical pump 4 and an electronic pump 5 .

[0051] Specifically, Figure 1-Figure 5 As shown, the drive assembly 10 includes a motor 1, a reducer assembly 2 and a differential assembly 3 arranged in a housing. The reducer assembly 2 is respectively connected to the output shaft 11 of the motor 1 and the differential assembly 3 in driving connection. The mechanical pump 4 and the electronic pump 5 are both arranged in the housing. The mechanical pump 4 is connected to the reducer assembly 2 or the differential assembly 3 in driving connection. The mechanical pump 4 and the electronic pump 5 are used together to drive the oil in the housing to flow to the drive assembly 10.

[0052] The mechanical pump 4 and the electronic pump 5 are connected to the oil inlet, and the oil inlet extends below the oil level at the bottom of the housing, so that the mechanical pump 4 and the electronic pump 5 can draw oil into the oil inlet and drive the oil to flow along the preset pipeline to the drive assembly 10, so as to achieve the purpose of lubricating and cooling the drive assembly 10. The electronic pump 5 is powered by a battery to provide power for pumping oil, and the mechanical pump 4 is a mechanical pump body structure, which achieves the effect of pumping oil through the mechanical energy of power transmission. For example, a rotating mechanism 41 can be provided in the mechanical pump 4, and the rotating mechanism 41 is transmission-connected to the reducer assembly 2 or the differential assembly 3. When the rotating mechanism 41 rotates, it can drive the mechanical pump 4 to inhale and discharge oil.

[0053] The mechanical pump 4 is connected to the reducer assembly 2 or the differential assembly 3 by transmission. The mechanical pump 4 can be connected to the reducer assembly 2 or the differential assembly 3 by coaxial connection with the drive shaft or by a gear pair. In this way, the installation position and connection method of the mechanical pump 4 can be selected according to the specific situation, thereby improving the flexibility and adaptability of the electric drive assembly 100. According to the specific design, components that can better match the requirements of the mechanical pump 4 can be selected in the reducer assembly 2 and the differential assembly 3, which can ensure that the mechanical pump 4 has a more stable output under different working conditions to achieve a better lubrication effect. For example, if the speed range of the differential assembly 3 is more suitable for the working characteristics of the mechanical pump 4, the mechanical pump 4 is connected to the differential assembly 3 by transmission, which can improve the efficiency of the electric drive assembly 100 and reduce energy loss.

[0054] The speed reducer assembly 2 and the differential assembly 3 are located at different positions, and the mechanical pump 4 can select a better connection point according to the space requirements. This may bring greater flexibility to the design of the electric drive assembly 100, making it easier to apply it in different vehicle models or different layouts, thereby reducing design complexity or cost.

[0055] When the electric drive assembly 100 is started, the motor 1 drives the reducer assembly 2 and the differential assembly 3 to operate, and the reducer assembly 2 or the differential assembly 3 then provides power to the mechanical pump 4, that is, when the electric drive assembly 100 is started, the mechanical pump 4 is started accordingly, so that the mechanical pump 4 drives the oil to flow to the drive assembly 10, so as to achieve the purpose of lubricating and cooling the drive assembly 10. When the drive assembly 10 is running, the mechanical pump 4 can continuously provide a stable oil flow, and the mechanical pump 4 can automatically adjust the flow according to the speed of the motor 1. For example, when the drive assembly 10 is running at a high speed, the efficiency of the mechanical pump 4 is improved accordingly, and more oil can be driven to flow to the drive assembly 10, thereby improving the cooling and lubrication effect of the electric drive assembly 100 under high speed and high load conditions.

[0056] The mechanical pump 4 and the electronic pump 5 cooperate with each other. The mechanical pump 4 pumps oil through the reducer assembly 2 or the differential assembly 3, which can effectively reduce the power of the electronic pump 5, thereby achieving energy saving. The electronic pump 5 is powered by a battery and is independent of the drive assembly 10. The flow rate of the pumped oil can be intelligently adjusted according to the real-time working conditions to avoid energy waste. The electronic pump 5 can also supply oil to the drive assembly 10 for lubrication in advance before the vehicle starts, or continue to supply oil to the drive assembly 10 for cooling after the drive assembly 10 stops running, thereby reducing the wear and thermal shock of the drive assembly 10 and extending the service life of the drive assembly 10.

[0057] In addition, when either the mechanical pump 4 or the electronic pump 5 breaks down or fails, the other one can take over, thereby avoiding the failure of the lubrication and cooling functions caused by oil pumping interruption, which can effectively improve the stability and reliability of the electric drive assembly 100.

[0058] According to the electric drive assembly 100 of the embodiment of the utility model, the mechanical pump 4 is connected to the reducer assembly 2 or the differential assembly 3 of the drive assembly 10 by transmission, and the mechanical pump 4 and the electronic pump 5 are used together to drive the oil to flow to the drive assembly 10. When the drive assembly 10 is running, the mechanical pump 4 can automatically adjust the pump oil flow according to the speed of the motor 1 to improve the cooling and lubrication effect of the electric drive assembly 100 under high speed and high load conditions. At the same time, the mechanical pump 4 can effectively reduce the power of the electronic pump 5, thereby achieving energy saving. When either the mechanical pump 4 or the electronic pump 5 fails or fails, the other can take over, thereby avoiding the interruption of the oil pumping and causing the failure of the lubrication and cooling functions, and can effectively improve the stability and reliability of the electric drive assembly 100.

[0059] In some embodiments of the present invention, Figure 1-Figure 4 As shown, the reducer assembly 2 includes a main shaft assembly 21 and a secondary shaft assembly 22 that mesh with each other. The main shaft assembly 21 is connected to the output shaft 11 of the motor 1 by transmission, the secondary shaft assembly 22 is connected to the differential assembly 3 by transmission, and the input shaft of the mechanical pump 4 is connected to the secondary shaft assembly 22 by transmission. The main shaft assembly 21 is directly connected to the output shaft 11 of the motor 1, and transmits the original power of the motor 1 to the secondary shaft assembly 22, and the secondary shaft assembly 22 is connected to the differential assembly 3 by transmission to achieve speed reduction and increase torque. At the same time, the secondary shaft assembly 22 transmits power to the mechanical pump 4, so that the mechanical pump 4 drives the oil to flow to the drive assembly 10 to achieve the purpose of lubricating and cooling the drive assembly 10. Among them, the way in which the mechanical pump 4 is connected to the secondary shaft assembly 22 can be through the coaxial connection of the drive shaft, or through the gear pair connection. In this way, the installation position and connection method of the mechanical pump 4 can be selected according to the specific situation, thereby improving the flexibility and adaptability of the electric drive assembly 100.

[0060] In some embodiments of the present invention, Figure 1-Figure 4 , Figure 8 and Fig. 9 As shown, the secondary shaft assembly 22 includes a rotating shaft 221, and the input shaft of the mechanical pump 4 is connected to the rotating shaft 221 and rotates synchronously. The mechanical pump 4 is located on one of the two sides in the axial direction of the secondary shaft assembly 22 and is coaxially arranged with the rotating shaft 221. In this way, the rotating shaft 221 can drive the input shaft of the mechanical pump 4 to rotate synchronously and coaxially, thereby driving the mechanical pump 4 to inhale and discharge oil, so as to pump the oil to the drive assembly 10 to achieve the purpose of lubrication and cooling. The transmission structure is simple and easy to implement, which can ensure the transmission stability of the mechanical pump 4 and the reducer assembly 2, and further ensure the reliability of the electric drive assembly 100.

[0061] like Figure 8 and Fig. 9 In the example shown, a rotatable rotating mechanism 41 is provided in the mechanical pump 4, and a speed gear 222 is provided in the secondary shaft assembly 22. The speed gear 222 is sleeved on the rotating shaft 221 and rotates synchronously with the rotating shaft 221. The speed gear 222 includes a first gear 223 and a second gear 224. The first gear 223 is meshed with the main shaft assembly 21, and the second gear 224 is meshed with the differential assembly 3. The rotating mechanism 41 is connected to the rotating shaft 221 through a connecting shaft 74, and the two ends of the connecting shaft 74 in the axial direction are respectively connected to the rotating mechanism 41 and the rotating shaft 221 through splines 741. In addition, the mechanical pump 4 also has an oil suction chamber 42 and an oil discharge chamber 43. When the rotating shaft 221 rotates, the connecting shaft 74 drives the rotating mechanism 41 to rotate. While the rotating mechanism 41 rotates, the volumes of the oil suction chamber 42 and the oil discharge chamber 43 are continuously changed, so that the oil suction chamber 42 absorbs oil and discharges oil from the oil discharge chamber 43 after being filled with oil, thereby realizing the oil pumping function of the mechanical pump 4.

[0062] In some embodiments of the present invention, Figure 3 As shown, the secondary shaft assembly 22 includes a speed gear 222, which is meshed with the main shaft assembly 21 or the differential assembly 3, and the input shaft of the mechanical pump 4 is connected with a first pump wheel, which is in driving connection with the speed gear 222. In this way, the speed gear 222 can be driven by the first pump wheel when rotating, so that the input shaft of the mechanical pump 4 and the first pump wheel rotate synchronously and coaxially, thereby driving the mechanical pump 4 to inhale and discharge oil, so as to pump the oil to the drive assembly 10 to achieve the purpose of lubrication and cooling. The transmission structure is simple and easy to implement, which can ensure the transmission stability of the mechanical pump 4 and the reducer assembly 2, and further ensure the reliability of the electric drive assembly 100.

[0063] In some embodiments of the present invention, Figure 5As shown, the differential assembly 3 includes a differential gear 31, which is meshed with the reducer assembly 2, and the input shaft of the mechanical pump 4 is connected with the second pump wheel 73, which is in driving connection with the differential gear 31. In this way, the differential gear 31 can be driven by the second pump wheel 73 when rotating, so that the input shaft of the mechanical pump 4 and the second pump wheel 73 rotate synchronously and coaxially, thereby driving the mechanical pump 4 to inhale and discharge oil, so as to pump the oil to the drive assembly 10 to achieve the purpose of lubrication and cooling. The transmission structure is simple and easy to implement, which can ensure the transmission stability of the mechanical pump 4 and the differential assembly 3, and further ensure the reliability of the electric drive assembly 100.

[0064] In some embodiments of the present invention, Figure 1 , Figure 2 , Figure 6 and Figure 7 As shown, the electric drive assembly 100 also includes a lubrication pipeline 6, and the mechanical pump 4 and the electronic pump 5 are used to pump oil into the lubrication pipeline 6, and the lubrication pipeline 6 is used to transport the oil to the drive assembly 10. The lubrication pipeline 6 plays a role in transportation and guidance. After the mechanical pump 4 and the electronic pump 5 pump the oil into the lubrication pipeline 6, the lubrication pipeline 6 can make the oil flow to different positions of the drive assembly 10 according to the preset flow path, so that the oil can be more accurately transported to different parts of the drive assembly 10 that have cooling and lubrication requirements, thereby improving the cooling and lubrication effects of the electric drive assembly 100, and further improving the reliability and stability of the electric drive assembly 100.

[0065] In some embodiments of the present invention, Figure 1 , Figure 2 and Figure 6 As shown, the lubrication pipeline 6 includes a main flow path 61 and a plurality of branch paths 62. The electronic pump 5 and the mechanical pump 4 simultaneously pump oil to the main flow path 61. The plurality of branch paths 62 are respectively connected to the main flow path 61, and are used to output oil to at least one of the motor 1, the reducer assembly 2, and the differential assembly 3. The mechanical pump 4 and the electronic pump 5 simultaneously pump oil into the main flow path 61. At least part of the main flow path 61 is arranged around the drive assembly 10. Along the oil flow direction, the plurality of branch paths 62 are respectively connected to the main flow path 61 in sequence, and the positions of the plurality of branch paths 62 correspond to the positions of the motor 1, the reducer assembly 2, and the differential assembly 3 with cooling and lubrication requirements. The oil flows from the main flow path 61 into the plurality of branch paths 62 in sequence and flows out, and is sprayed on the surfaces of the components with cooling and lubrication requirements, thereby realizing cooling and lubrication of the motor 1, the reducer assembly 2, and the differential assembly 3.

[0066] In some embodiments of the present invention, Figure 1 , Figure 2 and Figure 6As shown, the main flow 61 is connected with a filter 71 and an oil cooler 72 in sequence. The filter 71 is used to filter impurities in the oil, and the oil cooler 72 is used to cool the oil. Along the flow direction of the oil, the filter 71 and the oil cooler 72 are located upstream of the multiple branches 62. After the mechanical pump 4 and the electronic pump 5 pump the oil into the main flow 61, the oil first passes through the filter 71 and the oil cooler 72 in sequence, and then flows to the multiple branches 62. The filter 71 can filter particles and impurities in the oil, such as metal debris, dust, rubber particles, etc., to prevent impurities from clogging the lubrication pipeline 6 or wearing the motor 1, the transmission assembly and the differential assembly 3. The oil cooler 72 transfers the heat in the oil to a cooling medium such as air or coolant through heat exchange, which can reduce the temperature of the oil, thereby achieving the purpose of cooling the drive assembly 10. It can also prevent the oil from overheating and causing the viscosity to decrease, thereby avoiding affecting the lubrication effect of the oil.

[0067] In some embodiments of the present invention, Figure 1 , Figure 2 and Figure 6 As shown, the reducer assembly 2 includes a rotating shaft 221 and a plurality of reducer bearings 23, the reducer bearings 23 are arranged at both ends of the rotating shaft 221 in the axial direction, and are used to support the rotating shaft 221, and the branch 62 includes a first branch 621, one end of the first branch 621 is connected to the main flow 61, and the other end extends to the reducer assembly 2, and is used to output oil to the reducer bearings 23. The oil is output to the surface of the reducer bearings 23 through the first branch 621, cooling and lubricating each reducer bearing 23, and preventing the reducer bearing 23 from being overheated and affecting the operation of the electric drive assembly 100.

[0068] Preferably, if Figure 1 , Figure 2 and Figure 3 As shown, the reducer assembly 2 includes a main shaft assembly 21 and a secondary shaft assembly 22 that mesh with each other, the main shaft assembly 21 is connected to the output shaft 11 of the motor 1, the secondary shaft assembly 22 includes a first gear 223, a second gear 224 and a plurality of reducer bearings 23 that are coaxially arranged, the main shaft assembly 21 includes a third gear 211 and a plurality of reducer bearings 23 that are coaxially arranged, the first gear 223 meshes with the third gear 211, the differential assembly 3 includes a differential gear 31, and the second gear 224 meshes with the differential gear 31. The structure is simple and the design is reasonable, which can ensure the stable transmission between the motor 1, the reducer assembly 2 and the differential assembly 3, thereby driving the vehicle to travel stably. The oil can also be sprayed onto the surfaces of the first gear 223, the second gear 224 and the third gear 211 through the first branch 621, so as to achieve cooling and lubrication of the main shaft assembly 21, the secondary shaft assembly 22 and the differential gear 31, thereby improving the transmission reliability of the electric drive assembly 100.

[0069] In some embodiments of the present invention, Figure 1 , Figure 2 and Figure 6 As shown, the output shaft 11 of the motor 1 is sleeved with a first bearing 14, and the first bearing 14 is located at one end of the motor 1 close to the reducer assembly 2. The branch 62 includes a second branch 622, one end of the second branch 622 is connected to the main flow 61, and the other end extends to the first bearing 14, which is used to output oil to the first bearing 14. The mechanical pump 4 and the electronic pump 5 pump the oil into the main flow 61, and then enter the second branch 622 and flow out. The oil is sprayed to the surface of the first bearing 14 of the motor 1 through the second branch 622 to cool and lubricate the first bearing 14, to prevent the first bearing 14 from being overheated and affecting the operation of the motor 1, so as to improve the stability and reliability of the electric drive assembly 100.

[0070] In some embodiments of the present invention, Figure 1 , Figure 2 and Figure 6 As shown, the motor 1 includes an output shaft 11, a stator 12 and a rotor 13. The output shaft 11 has a channel extending in the axial direction of the output shaft 11, and the peripheral wall of the channel has an oil outlet hole 131. The rotor 13 is sleeved outside the output shaft 11, and the oil outlet hole 131 penetrates the peripheral wall of the output shaft 11 and the rotor 13. The stator 12 is arranged outside the rotor 13. The branch 62 includes a third branch 623 and a fourth branch 624. The third branch 623 is arranged outside the motor 1 and extends in the axial direction of the motor 1, and is used to output oil to the stator 12. The fourth branch 624 is connected to one end of the channel along the axial direction of the output shaft 11, and is used to output oil to the rotor 13 through the oil outlet hole 131. The oil in the main flow path 61 can cool and lubricate the stator 12 and the rotor 13 of the motor 1 through the third branch 623 and the fourth branch 624 respectively, avoiding excessive temperature from affecting the operation of the motor 1, thereby improving the stability and reliability of the electric drive assembly 100.

[0071] The channel in the output shaft 11 is connected to the fourth branch 624, and the oil enters the output shaft 11 from the fourth branch 624, and flows out through the oil outlet 131 on the peripheral wall of the channel by utilizing the centrifugal force generated when the output shaft 11 rotates, thereby achieving lubrication and cooling of the rotor 13. The internal space of the output shaft 11 is fully utilized, and the additional layout of the oil pipeline for lubricating the rotor 13 is avoided, thereby improving the utilization rate of the internal space of the motor 1 and making the structure of the electric drive assembly 100 more compact.

[0072] In some embodiments of the present invention, Figure 1 , Figure 2 and Figure 6As shown, the first sub-flow path 625 and the second sub-flow path 626 are provided at both axial ends of the stator 12, and the first sub-flow path 625 and the second sub-flow path 626 are both annularly arranged outside the stator 12, and the third branch 623 is connected to the first sub-flow path 625 or the second sub-flow path 626. The stator 12 is also provided with an oil passage 627, which extends in the axial direction of the stator 12, and the oil passage 627 is a plurality of oil passages arranged at intervals in the circumferential direction of the stator 12, and the first sub-flow path 625 and the second sub-flow path 626 are respectively connected through a plurality of oil passages 627, and the oil passages 627 extend in the axial direction of the stator 12 and are a plurality of oil passages arranged at intervals in the circumferential direction of the stator 12. In this way, the oil can flow to various parts of the stator 12 through the first sub-flow path 625, the oil passage 627, and the second sub-flow path 626, so as to enhance the cooling and lubrication effects on the stator 12.

[0073] Specifically, the stator 12 includes a winding and a silicon steel sheet arranged around the outer periphery of the winding. The winding extends from both axial ends of the silicon steel sheet. An oil injection ring 16 can be installed on the outer periphery of the winding to spray oil and cool the winding. There are two oil injection rings 16, which are arranged outside the stator 12 and at both ends of the axial direction of the stator 12. The first sub-flow path 625 and the second sub-flow path 626 are respectively formed on the two oil injection rings 16, and multiple oil channels 627 are opened on the silicon steel sheet.

[0074] In some embodiments of the present invention, Figure 1 , Figure 2 and Figure 6 As shown, the output shaft 11 of the motor 1 is sleeved with a second bearing 15, and the second bearing 15 is located at one end of the motor 1 away from the reducer assembly 2. One end of the third branch 623 along the axial direction of the motor 1 is connected to a third sub-flow path 628, and the third sub-flow path 628 is used to output oil to the second bearing 15. The mechanical pump 4 and the electronic pump 5 pump the oil into the main flow path 61, and then the oil flows into the third sub-flow path 628 after entering the third branch 623. The oil is sprayed onto the surface of the second bearing 15 of the motor 1 through the third sub-flow path 628 to cool and lubricate the second bearing 15, so as to prevent the second bearing 15 from being overheated and affecting the operation of the motor 1, so as to improve the stability and reliability of the electric drive assembly 100.

[0075] In some embodiments of the present invention, Figure 7 As shown, the lubrication pipeline 6 includes a first flow path 63 and a second flow path 64, the first flow path 63 and the second flow path 64 are independent of each other, the mechanical pump 4 is used to pump oil to the first flow path 63, the electronic pump 5 is used to pump oil to the second flow path 64, and the first flow path 63 and the second flow path 64 are used together to transport the oil to the drive assembly 10. Therefore, the mechanical pump 4 and the electronic pump 5 can work independently of each other, avoiding mutual interference between the mechanical pump 4 and the electronic pump 5, reducing the load of the mechanical pump 4 and the electronic pump 5, and thus improving the oil pumping efficiency of the mechanical pump 4 and the electronic pump 5.

[0076] In some embodiments of the present invention, Figure 7 As shown, the first flow path 63 and the second flow path 64 deliver oil to different parts of the drive assembly 10. Avoiding the mechanical pump 4 and the electronic pump 5 from repeatedly cooling and lubricating the same parts can reduce the loads of the mechanical pump 4 and the electronic pump 5, respectively, thereby improving the oil pumping efficiency of the mechanical pump 4 and the electronic pump 5.

[0077] In some embodiments of the present invention, Figure 7 As shown, the motor 1 includes an output shaft 11 and a rotor 13. The output shaft 11 has a channel extending in the axial direction of the output shaft 11. The peripheral wall of the channel has an oil outlet 131. The rotor 13 is sleeved outside the output shaft 11. The oil outlet 131 penetrates the peripheral wall of the output shaft 11 and the rotor 13. The first flow path 63 includes a first oil path 631. The mechanical pump 4 is used to pump oil to the first oil path 631. The first oil path 631 is connected to one end of the channel along the axial direction of the output shaft 11, and is used to output oil to the rotor 13 through the oil outlet 131. The mechanical pump 4 pumps oil to the first oil path 631 alone to achieve cooling and lubrication of the rotor 13 of the motor 1, which can improve the stability and efficiency of oil delivery to the rotor 13, thereby improving the cooling and lubrication effect, avoiding excessive temperature affecting the operation of the motor 1, and further improving the stability and reliability of the electric drive assembly 100.

[0078] In some embodiments of the present invention, Figure 7 As shown, the second flow path 64 includes a second oil path 641 and a plurality of sub-paths 642, and the electronic pump 5 is used to pump oil to the second oil path 641; the plurality of sub-paths 642 are respectively connected to the second oil path 641, and are used to output oil to the reducer assembly 2, the differential assembly 3, and the stator 12 and the bearing of the motor 1. The electronic pump 5 pumps oil into the second oil path 641 alone, which can improve the stability and efficiency of oil delivery to the second flow path 64. Along the oil flow direction, the plurality of sub-paths 642 are respectively connected to the second oil path 641 in sequence, and the positions of the plurality of sub-paths 642 correspond to the positions in the motor 1, the reducer assembly 2, and the differential assembly 3 where cooling and lubrication are required. The oil flows from the second oil path 641 into the plurality of sub-paths 642 in sequence and flows out, and is sprayed on the surface of the components where cooling and lubrication are required, thereby achieving cooling and lubrication of the reducer assembly 2, the differential assembly 3, and the stator 12 and the bearing of the motor 1.

[0079] A vehicle according to an embodiment of the present utility model includes: the electric drive assembly 100 mentioned above.

[0080] According to the vehicle of the embodiment of the utility model, the mechanical pump 4 is connected to the reducer assembly 2 or the differential assembly 3 of the drive assembly 10 by transmission, and the mechanical pump 4 and the electronic pump 5 are used together to drive the oil to flow to the drive assembly 10. When the drive assembly 10 is running, the mechanical pump 4 can automatically adjust the pump oil flow according to the speed of the motor 1 to improve the cooling and lubrication effect of the electric drive assembly 100 under high speed and high load conditions. At the same time, the mechanical pump 4 can effectively reduce the power of the electronic pump 5, thereby achieving energy saving. When either the mechanical pump 4 or the electronic pump 5 fails or fails, the other can take over, thereby avoiding the interruption of the oil pumping and causing the failure of the lubrication and cooling functions, and can effectively improve the stability and reliability of the electric drive assembly 100.

[0081] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0082] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An electric drive assembly, characterized in that: include: case; A drive assembly (10), the drive assembly (10) comprising a motor (1), a reducer assembly (2) and a differential assembly (3) arranged in the housing, the reducer assembly (2) being drivingly connected to an output shaft (11) of the motor (1) and the differential assembly (3) respectively; A mechanical pump (4) and an electronic pump (5), wherein the mechanical pump (4) and the electronic pump (5) are both arranged in the housing, the mechanical pump (4) is drivingly connected to the reducer assembly (2) or the differential assembly (3), and the mechanical pump (4) and the electronic pump (5) are used together to drive the oil in the housing to flow toward the drive assembly (10).

2. The electric drive assembly according to claim 1, characterized in that: The reducer assembly (2) comprises a main shaft assembly (21) and a secondary shaft assembly (22) which are meshed with each other, the main shaft assembly (21) being transmission-connected to the output shaft (11) of the motor (1), the secondary shaft assembly (22) being transmission-connected to the differential assembly (3), and the input shaft of the mechanical pump (4) being transmission-connected to the secondary shaft assembly (22).

3. The electric drive assembly according to claim 2, characterized in that: The secondary shaft assembly (22) comprises a rotating shaft (221), the input shaft of the mechanical pump (4) is connected to the rotating shaft (221) and rotates synchronously, and the mechanical pump (4) is located on one of the two sides in the axial direction of the secondary shaft assembly (22) and is coaxially arranged with the rotating shaft (221).

4. The electric drive assembly according to claim 2, characterized in that: The secondary shaft assembly (22) comprises a speed gear (222), the speed gear (222) is meshed with the primary shaft assembly (21) or the differential assembly (3), the input shaft of the mechanical pump (4) is connected to a first pump wheel, and the first pump wheel is drivingly connected to the speed gear (222).

5. The electric drive assembly according to claim 1, characterized in that: The differential assembly (3) comprises a differential gear (31), the differential gear (31) meshing with the reducer assembly (2), the input shaft of the mechanical pump (4) being connected to a second pump wheel (73), the second pump wheel (73) being drivingly connected to the differential gear (31).

6. The electric drive assembly according to claim 1, characterized in that: The electric drive assembly (100) further includes: A lubrication pipeline (6), the mechanical pump (4) and the electronic pump (5) are used to pump oil to the lubrication pipeline (6), and the lubrication pipeline (6) is used to transport the oil to the drive component (10).

7. The electric drive assembly according to claim 6, characterized in that: The lubrication pipeline (6) comprises: A main flow path (61), wherein the electronic pump (5) and the mechanical pump (4) simultaneously pump oil to the main flow path (61); A plurality of branch passages (62), wherein the plurality of branch passages (62) are respectively connected to the main passage (61) and are used to output oil to at least one of the motor (1), the reducer assembly (2) and the differential assembly (3).

8. The electric drive assembly according to claim 7, characterized in that: The main flow path (61) is connected in sequence to a filter (71) and an oil cooler (72); the filter (71) is used to filter impurities in the oil, and the oil cooler (72) is used to cool the oil; along the flow direction of the oil, the filter (71) and the oil cooler (72) are located upstream of the plurality of branch paths (62).

9. The electric drive assembly according to claim 7, characterized in that: The reducer assembly (2) comprises a rotating shaft (221) and a plurality of reducer bearings (23), wherein the reducer bearings (23) are arranged at both ends of the rotating shaft (221) in an axial direction and are used to support the rotating shaft (221), and the branch (62) comprises: A first branch (621), one end of which is connected to the main flow path (61), and the other end of which extends to the reducer assembly (2), and is used to output oil to the reducer bearing (23).

10. The electric drive assembly according to claim 7, characterized in that: A first bearing (14) is sleeved on the output shaft (11) of the motor (1), and the first bearing (14) is located at one end of the motor (1) close to the reducer assembly (2). The branch (62) comprises: A second branch (622), one end of which is connected to the main flow path (61), and the other end of which extends to the first bearing (14), and is used to output oil to the first bearing (14).

11. The electric drive assembly according to claim 7, characterized in that: The motor (1) comprises an output shaft (11), a stator (12) and a rotor (13); the output shaft (11) has a channel extending in the axial direction of the output shaft (11); the peripheral wall of the channel has an oil outlet hole (131); the rotor (13) is sleeved outside the output shaft (11); the oil outlet hole (131) penetrates the peripheral walls of the output shaft (11) and the rotor (13); the stator (12) is arranged outside the rotor (13); the branch (62) comprises: a third branch (623), the third branch (623) being arranged outside the motor (1) and extending along the axial direction of the motor (1), and being used for outputting oil to the stator (12); A fourth branch (624), the fourth branch (624) is connected to one end of the channel along the axial direction of the output shaft (11), and is used to output oil to the rotor (13) through the oil outlet hole (131).

12. The electric drive assembly according to claim 11, characterized in that: A first sub-flow path (625) and a second sub-flow path (626) are provided at two axial ends of the stator (12); the first sub-flow path (625) and the second sub-flow path (626) are both arranged outside the stator (12); the third branch path (623) is connected to the first sub-flow path (625) or the second sub-flow path (626); an oil passage (627) is further provided on the stator (12); the oil passage (627) extends along the axial direction of the stator (12); and the oil passage (627) is a plurality of passages arranged at intervals along the circumferential direction of the stator (12); the first sub-flow path (625) and the second sub-flow path (626) are connected respectively through the plurality of oil passages (627).

13. The electric drive assembly according to claim 11, characterized in that: A second bearing (15) is sleeved on the output shaft (11) of the motor (1), and the second bearing (15) is located at an end of the motor (1) away from the reducer assembly (2). One end of the third branch (623) along the axial direction of the motor (1) is connected to a third sub-flow path (628), and the third sub-flow path (628) is used to output oil to the second bearing (15).

14. The electric drive assembly according to claim 6, characterized in that: The lubrication pipeline (6) comprises: A first flow path (63) and a second flow path (64), wherein the first flow path (63) and the second flow path (64) are independent of each other, the mechanical pump (4) is used to pump oil to the first flow path (63), the electronic pump (5) is used to pump oil to the second flow path (64), and the first flow path (63) and the second flow path (64) are used together to transport oil to the drive component (10).

15. The electric drive assembly according to claim 14, characterized in that: The first flow path (63) and the second flow path (64) transport oil to different parts of the drive component (10).

16. The electric drive assembly according to claim 14, characterized in that: The motor (1) comprises an output shaft (11) and a rotor (13); the output shaft (11) has a channel extending in the axial direction of the output shaft (11); the peripheral wall of the channel has an oil outlet hole (131); the rotor (13) is sleeved outside the output shaft (11); the oil outlet hole (131) penetrates the peripheral wall of the output shaft (11) and the rotor (13); the first flow path (63) comprises: A first oil circuit (631), wherein the mechanical pump (4) is used to pump oil to the first oil circuit (631), and the first oil circuit (631) is connected to one end of the channel along the axial direction of the output shaft (11), and is used to output oil to the rotor (13) through the oil outlet hole (131).

17. The electric drive assembly according to claim 14, characterized in that: The second flow path (64) comprises: A second oil circuit (641), wherein the electronic pump (5) is used to pump oil to the second oil circuit (641); A plurality of sub-paths (642), wherein the plurality of sub-paths (642) are respectively connected to the second oil path (641) and are used to output oil to the reducer assembly (2), the differential assembly (3) and the stator (12) and bearings of the motor (1) respectively.

18. A vehicle, characterized in that: It comprises an electric drive assembly (100) according to any one of claims 1-17.

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