Electric drive device and vehicle

Abstract

The utility model provides an electric drive device and a vehicle, and the electric drive device comprises a shell provided with a first oil inlet; the first motor is provided with a first motor shaft, a first shaft inner oil channel communicated with the first oil inlet is formed in the first motor shaft, and a first shaft hole communicated with the first shaft inner oil channel is formed in the outer side of the first motor shaft; the first speed reducer is in transmission connection with the first motor shaft; the first oil guide piece is located at the first shaft hole; part of oil from the first oil inlet flows to the first shaft hole through the first in-shaft oil duct, and the first oil guide piece is used for spraying the oil at the first shaft hole to the joint of the first motor shaft and the first speed reducer. The first oil guide piece forcibly sprays oil liquid to the joint of the first motor shaft and the first speed reducer for cooling and lubricating, the influence on the lubricating performance under the vehicle roll working condition can be reduced, the lubricating effect of the transmission mechanism under the working condition of the limit dip angle is guaranteed, and the failure risk caused by insufficient lubrication is reduced.

Description

Technical Field

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

[0002] Existing electric drive systems all use electric motors to control the torque and rotation direction of the wheels on both sides of the vehicle. During vehicle operation, a cooling and lubrication hydraulic system cools and lubricates the transmission mechanism between the motor and the wheels. However, existing electric drive systems suffer from insufficient lubrication of the transmission mechanism at extreme tilt angles, leading to an increased risk of failure. Utility Model Content

[0003] In view of this, an electric drive device and vehicle are provided that can solve the problem of insufficient lubrication of the transmission mechanism under extreme tilt angles and reduce the risk of failure.

[0004] The first aspect of this application provides an electric drive device, comprising: a housing having a first oil inlet and having a first motor cavity and a first reducer cavity inside; a first motor disposed within the first motor cavity and having a first motor shaft, the first motor shaft having a first internal oil passage communicating with the first oil inlet, and a first shaft hole communicating with the first internal oil passage on the outer side of the first motor shaft; a first reducer disposed within the first reducer cavity and being drively connected to the first motor shaft; and a first oil guide member disposed at one end of the first motor shaft near the first reducer and located at the first shaft hole; a portion of the oil from the first oil inlet flows through the first internal oil passage to the first shaft hole, and the first oil guide member is used to spray the oil at the first shaft hole to the connection between the first motor shaft and the first reducer.

[0005] In some embodiments, the first oil guide member has a first oil passage groove communicating with the first shaft hole inside, and the first oil guide member has a first oil injection hole communicating with the first oil passage groove on the side facing the first reducer.

[0006] In some embodiments, the housing is further provided with a second oil inlet, and the first oil inlet and the second oil inlet are spaced apart. The first oil inlet and the second oil inlet are respectively used to communicate with the oil outlet of the oil cooler. The housing is provided with a first oil injection pipe and a second oil injection pipe, which are spaced apart along the outer periphery of the first motor. The first oil injection pipe is connected to the first oil inlet, and the second oil injection pipe is connected to the second oil inlet.

[0007] In some embodiments, a first side plate is provided inside the housing, the first side plate separating a first motor cavity and a first reducer cavity, one end of the first motor shaft passing through the first side plate and entering the first reducer cavity; the first side plate is provided with a first support bearing and a first motor front bearing, the first support bearing connecting to the first reducer, the first motor front bearing supporting the first motor shaft, a first oil guide being provided on the side of the first side plate facing the first reducer cavity; a first diverting oil passage is provided inside the first side plate, one end of the first diverting oil passage connecting to a first fuel injection pipe, and the other end of the first diverting oil passage passing through the first support bearing and the first motor front bearing.

[0008] In some embodiments, the electric drive device further includes a first end cover, the first end cover being provided with a second bracket bearing, the second bracket bearing being connected to a first reducer; a first end cover oil passage is provided inside the first end cover, one end of the first end cover oil passage is connected to a second fuel injection pipe, and the other end of the first end cover oil passage passes through the second bracket bearing.

[0009] In some embodiments, the first reducer includes a first planetary gear pin and a first planetary gear bearing. The first planetary gear pin passes through the inner ring of the first planetary gear bearing. The first planetary gear pin has a first pin oil passage communicating with the first end cover oil passage. The outer side of the first planetary gear pin has a first pin hole communicating with the first pin oil passage. The first end cover has a first oil guide nozzle connected to the inner side of the first planetary gear pin. The first end cover has a first oil passage hole. One end of the first oil passage hole communicates with the first end cover oil passage, and the other end of the first oil passage hole passes through the first oil guide nozzle.

[0010] In some embodiments, a partition is provided inside the housing, and the partition and the first side plate define a first motor cavity. The partition is provided with a first motor rear bearing, which cooperates with the first motor front bearing to support the first motor shaft. Some oil in the first motor cavity flows into the first motor rear bearing through the gap between the first motor shaft and the partition.

[0011] In some embodiments, the housing is further provided with an oil supply passage for communicating with the oil cooling inlet of the oil cooler, and the oil supply passage is disposed between the first oil inlet and the second oil inlet.

[0012] In some embodiments, the inner wall of the first motor cavity is provided with a first oil guide groove, which is recessed in a direction away from the first motor.

[0013] In some embodiments, the electric drive device further includes a second motor, a second reducer, and a second oil guide; the housing also has a second motor cavity and a second reducer cavity; the second motor is disposed in the second motor cavity and has a second motor shaft coaxially arranged with the first motor shaft, the second motor shaft has a second internal oil passage communicating with the first oil inlet, and a third shaft hole communicating with the second internal oil passage is opened on the outside of the second motor shaft; the second reducer is disposed in the second reducer cavity and is drively connected to the second motor shaft; the second oil guide is disposed at one end of the second motor shaft near the second reducer and located at the third shaft hole; part of the oil from the first oil inlet flows to the third shaft hole through the second internal oil passage, and the second oil guide is used to spray the oil at the third shaft hole to the connection between the second motor shaft and the second reducer.

[0014] The second aspect of this application provides a vehicle, which includes a vehicle body, wheels, and an electric drive device as provided in the first aspect, wherein the electric drive device is fixed to the vehicle body and the wheels are connected to the electric drive device.

[0015] With the electric drive device and vehicle provided in this application, a portion of the oil flowing into the housing from the first oil inlet can flow into the oil passage inside the first shaft. A portion of the oil in the oil passage inside the first shaft is discharged through the first shaft hole to the first oil guide located outside the first motor shaft. The first oil guide forces the oil to the connection between the first motor shaft and the first reducer. By using forced lubrication, the first reducer is cooled and lubricated, which can reduce the impact on lubrication performance under vehicle tilting conditions, ensure the lubrication effect of the transmission mechanism under extreme tilting angle conditions, and reduce the risk of failure caused by insufficient lubrication. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the oil passage distribution in an electric drive device in related technologies.

[0017] Figure 2 This is a schematic diagram of the external appearance of the electric drive device provided in the embodiments of this application.

[0018] Figure 3 This is a first cross-sectional view of the electric drive device provided in an embodiment of this application.

[0019] Figure 4 This is a schematic diagram of the oil passage distribution of the electric drive device provided in the embodiments of this application.

[0020] Figure 5 for Figure 3 A magnified view of the middle V section.

[0021] Figure 6 A schematic diagram of the structure of the first motor shaft and the second motor shaft provided in the embodiments of this application.

[0022] Figure 7This is a second cross-sectional view of the electric drive device provided in an embodiment of this application.

[0023] Figure 8 This is a schematic diagram of the internal structure of the first motor cavity provided in an embodiment of this application.

[0024] Figure 9 This is a schematic diagram illustrating the fit between the first planetary gear pin and the first oil guide nozzle, provided in an embodiment of this application.

[0025] Figure 10 This is a schematic diagram illustrating the fit between the second planetary gear pin and the second oil guide nozzle, as provided in an embodiment of this application.

[0026] Explanation of main component symbols

[0027] 10. Housing; 11. First oil inlet; 12. Second oil inlet; 13. Partition plate; 131. Oil inlet hole inside the shaft; 14. Oil supply port;

[0028] 14A, First motor cavity; 141A, First oil guide groove; 15A, First reducer cavity; 16A, First side plate; 161A, First motor front bearing; 162A, First bracket bearing; 17A, First bracket; 18A, First end cover; 181A, First oil seal; 182A, Second bracket bearing; 183A, First oil passage hole; 19A, First motor rear bearing;

[0029] 14B, Second motor cavity; 15B, Second reducer cavity; 16B, Second side plate; 161B, Second motor front bearing; 162B, Third bracket bearing; 17B, Second bracket; 18B, Second end cover; 181B, Second oil seal; 182B, Fourth bracket bearing; 183B, Second oil passage hole; 19B, Second motor rear bearing;

[0030] 101. Main oil passage; 102. First branch oil passage; 103. Second branch oil passage; 104. Oil supply passage;

[0031] 105A, First fuel injection pipe; 106A, Second fuel injection pipe; 107A, First branch fuel passage; 108A, First end cover fuel passage;

[0032] 105B, Third fuel injection pipe; 106B, Fourth fuel injection pipe; 107B, Second split fuel passage; 108B, Second end cover fuel passage;

[0033] 20A, First motor; 21A, First motor shaft; 221A, First shaft hole; 222A, Second shaft hole; 23A, First stator assembly; 24A, First rotor; 25A, First resolver stator; 201A, First shaft internal oil passage;

[0034] 20B, Second motor; 21B, Second motor shaft; 221B, Third shaft hole; 222B, Fourth shaft hole; 23B, Second stator assembly; 24B, Second rotor; 25B, Second resolver stator; 201B, Second shaft internal oil passage;

[0035] 30A, First reducer; 31A, First planetary carrier; 32A, First planetary gear pin; 321A, First pin bore; 33A, First planetary gear bearing; 301A, First pin oil passage;

[0036] 30B, Second reducer; 31B, Second planetary carrier; 32B, Second planetary gear pin; 321B, Second pin bore; 33B, Second planetary gear bearing; 301B, Second pin oil passage;

[0037] 40A, First oil guide component; 41A, First oil passage groove; 42A, First oil injection hole; 40B, Second oil guide component;

[0038] 50. Motor controller; 51. Busbar plug; 52. Low-voltage motor connector; 53. High-voltage adapter copper busbar;

[0039] 60. Oil cooler; 61. Electric pump assembly; 62. Suction filter;

[0040] 70A, First oil guide nozzle; 70B, Second oil guide nozzle;

[0041] 1000, Housing; 1001, First side; 1002, Second side; 1003, First fuel injector pipe; 1004, Second fuel injector pipe;

[0042] 2000, oil cooling mechanism; 2001, oil inlet passage. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments in this application, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0044] In the description of this application, it should be understood that the terms "upper," "lower," "inner," "outer," "side," etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the equipment or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0045] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0046] Some embodiments will now be described with reference to the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0047] Electric drive systems all use motors to control the torque and rotation direction of the wheels on both sides of the vehicle. During vehicle operation, a cooling and lubrication hydraulic system cools and lubricates the transmission mechanism between the motor and the wheels.

[0048] However, when cooling and lubricating the connection between the motor shaft and the reducer (such as a planetary gear reducer), the electric drive system usually relies on splash lubrication. Under conditions such as vehicle tilting and transmission mechanisms being at their limit angles, it is difficult to ensure that the oil splashes to the connection of the transmission mechanism on the side at the limit angle, which increases the risk of failure of the transmission mechanism on the side at the limit angle.

[0049] In view of this, this application provides an electric drive device and vehicle that can ensure the lubrication effect of the transmission mechanism under extreme tilt angle conditions and reduce the risk of failure caused by insufficient lubrication.

[0050] This application first provides an electric drive device applicable to a vehicle. The vehicle includes a body, wheels, and the electric drive device. The electric drive device is fixed to the body, and the wheels are connected to the electric drive device. The electric drive device drives the corresponding wheels to rotate, thereby enabling the vehicle to move. In the example of this application, the electric drive device is a distributed electric drive device. In other embodiments, the electric drive device can also be a centralized electric drive device, and this application does not impose any limitations on this.

[0051] like Figures 2 to 5 As shown, the electric drive device includes a housing 10, a first motor 20A, a first reducer 30A, and a first oil guide 40A. The housing 10 is provided with a first oil inlet 11, which is the inlet for oil from outside the housing 10 to flow into the housing 10. The interior of the housing 10 has a first motor cavity 14A and a first reducer cavity 15A.

[0052] The first motor 20A is disposed within the first motor cavity 14A, and the first motor 20A has a first motor shaft 21A. The first motor shaft 21A has a first internal oil passage 201A that communicates with the first oil inlet 11, and some of the oil flowing into the first oil inlet 11 can flow into the first internal oil passage 201A. The outer side of the first motor shaft 21A has a first shaft hole 221A that communicates with the first internal oil passage 201A, and the oil in the first internal oil passage 201A can be ejected from the outside of the first motor shaft 21A through the first shaft hole 221A.

[0053] The first reducer 30A is disposed within the first reducer cavity 15A and is drive-connected to the first motor shaft 21A. In the example of this application, the first reducer 30A is a planetary gear reducer. In other embodiments, the first reducer 30A may also be a parallel shaft reducer or other device capable of drive-connecting to a motor. This application does not impose any limitations on this.

[0054] The first oil guide 40A is disposed at one end of the first motor shaft 21A near the first reducer 30A, and is located at the first shaft hole 221A. Part of the oil from the first oil inlet 11 flows through the first shaft inner oil passage 201A to the first shaft hole 221A. The first oil guide 40A is used to spray the oil at the first shaft hole 221A to the connection between the first motor shaft 21A and the first reducer 30A.

[0055] Through the electric drive device provided in this application, a portion of the oil flowing into the housing 10 from the first oil inlet 11 can flow into the first shaft inner oil passage 201A. A portion of the oil in the first shaft inner oil passage 201A is discharged through the first shaft hole 221A to the first oil guide 40A located outside the first motor shaft 21A. The first oil guide 40A forcibly sprays the oil to the connection between the first motor shaft 21A and the first reducer 30A. This application uses forced lubrication to cool and lubricate the first reducer 30A, which can reduce the impact on lubrication performance under vehicle tilting conditions, ensure the lubrication effect of the transmission mechanism under extreme tilting angles, and reduce the risk of failure due to insufficient lubrication.

[0056] Please refer to the following: Figure 6 In some embodiments, the electric drive device further includes a second motor 20B, a second reducer 30B, and a second oil guide 40B. The housing 10 has a second motor cavity 14B and a second reducer cavity 15B inside.

[0057] The second motor 20B is disposed within the second motor cavity 14B, and the second motor 20B has a second motor shaft 21B. The second motor shaft 21B has an internal oil passage 201B that communicates with the first oil inlet 11, allowing some of the oil flowing into the first oil inlet 11 to flow into the internal oil passage 201B. A third shaft hole 221B is provided on the outer side of the second motor shaft 21B, communicating with the internal oil passage 201B, allowing oil within the internal oil passage 201B to be discharged to the outside of the second motor shaft 21B through the third shaft hole 221B.

[0058] The second reducer 30B is disposed within the second reducer cavity 15B and is drive-connected to the second motor shaft 21B. In the example of this application, the second reducer 30B is a planetary gear reducer. In other embodiments, the second reducer 30B can also be a parallel shaft reducer or other device capable of drive-connecting to the motor. This application does not impose any limitations on this.

[0059] The second oil guide 40B is disposed at one end of the second motor shaft 21B near the second reducer 30B, and is located at the third shaft hole 221B. Part of the oil from the first oil inlet 11 flows through the oil passage 201B inside the second shaft to the third shaft hole 221B. The second oil guide 40B is used to spray the oil at the third shaft hole 221B to the connection between the second motor shaft 21B and the second reducer 30B.

[0060] Part of the oil flowing into the housing 10 from the first oil inlet 11 can flow into the second shaft inner oil passage 201B. Part of the oil in the second shaft inner oil passage 201B is discharged through the second shaft hole 222A to the second oil guide 40B located outside the second motor shaft 21B. The second oil guide 40B forcibly sprays the oil to the connection between the second motor shaft 21B and the second reducer 30B. The second reducer 30B is cooled and lubricated by forced lubrication, which can reduce the impact on lubrication performance under vehicle tilting conditions, ensure the lubrication effect of the transmission mechanism under extreme tilting angle conditions, and reduce the risk of failure caused by insufficient lubrication.

[0061] For ease of understanding, the following text uses the electric drive device as a reference and defines a first direction, a second direction, and a third direction. The first direction, the second direction, and the third direction are mutually perpendicular. The first direction is the X direction in the diagram, the second direction is the Y direction in the diagram, and the third direction is the Z direction in the diagram. Among them, the distribution direction of the first motor 20A and the second motor 20B is the first direction.

[0062] In the example of this application, the electric drive device adopts a dual-motor distributed architecture. The first motor 20A and the second motor 20B are symmetrically distributed from left to right. The first reducer 30A and the second reducer 30B are also symmetrically distributed from left to right. The first oil guide 40A and the second oil guide 40B can respectively provide forced lubrication to the transmission mechanisms on the left and right sides, thereby improving the stability of the vehicle during driving.

[0063] In some embodiments, the electric drive device further includes a motor controller 50, a bus plug 51, a low-voltage motor connector 52, and a high-voltage adapter busbar 53, all of which are electrically connected to the motor controller 50. The motor controller 50 is electrically connected to the first motor 20A and the second motor 20B, respectively. The motor controller 50 converts direct current into three-phase power to drive the first motor 20A and the second motor 20B, and controls the torque and rotation direction of the first motor 20A and the second motor 20B. During normal operation, the power output from the first motor 20A and the second motor 20B is reduced in speed by the first reducer 30A and the second reducer 30B before being output to the half-shafts. Thus, according to the overall vehicle operating conditions, independent vector control of the torque, speed, and direction of the wheels on both sides of the vehicle can be achieved.

[0064] In some embodiments, the electric drive unit further includes an oil cooler 60, an electric pump assembly 61, and a suction filter 62. The oil cooler 60 is fixed to the housing 10 and has an oil cooling inlet and an oil outlet. There are two oil outlets, defined as a first oil outlet and a second oil outlet, respectively. The first oil outlet is connected to a first internal shaft oil passage 201A and a second internal shaft oil passage 201B. The electric pump assembly 61 and the suction filter 62 are fixed to the housing 10, with the electric pump assembly 61 connected to the suction filter 62. The suction filter 62 is connected to an external oil supply device for the electric drive unit. The oil cooler 60 and the electric pump assembly 61 are respectively disposed on opposite sides of the housing 10 in a second direction. The housing 10 is provided with an oil supply passage 104, which connects to the oil cooling inlet of the oil cooler 60.

[0065] For example, the oil cooler 60 is disposed at the top of the housing 10, and the electric pump assembly 61 is disposed at the bottom of the housing 10. The suction filter 62 is connected to one end of the oil supply passage 104, and the oil cooling inlet is connected to the other end of the oil supply passage 104.

[0066] During cooling and lubrication, the electric pump assembly 61 generates negative pressure, drawing oil from the oil supply device into the suction filter 62. The oil drawn into the suction filter 62 then enters the electric pump assembly 61 and flows through the oil supply passage 104 to the oil cooling inlet, and then enters the oil cooler 60. After being cooled, the oil in the oil cooler 60 is discharged from the first oil outlet and the second oil outlet respectively.

[0067] In some embodiments, a partition 13 and a first side plate 16A are provided inside the housing 10. The partition 13 is located in the middle of the housing 10, and the first side plate 16A is located on one side of the housing 10. The first side plate 16A and the partition 13 define a first motor cavity 14A. A first bracket 17A and a first end cap 18A are provided on the side of the housing 10 near the first side plate 16A. A first reducer cavity 15A is formed inside the first bracket 17A. A first reducer 30A is fixed inside the first bracket 17A. The first side plate 16A separates the first motor cavity 14A and the first reducer cavity 15A. A first oil guide 40A is fixed to the first side plate 16A, and one end of the first motor shaft 21A passes through the first side plate 16A and enters the first reducer cavity 15A.

[0068] The first end cap 18A is disposed on one side of the first bracket 17A, and the first end cap 18A, together with the first bracket 17A, supports and fixes the first reducer 30A. The first end cap 18A is provided with a first oil seal 181A, which prevents oil leakage from the inside of the first reducer cavity 15A, and at the same time blocks external contaminants such as mud and water vapor from entering the first reducer cavity 15A, ensuring that the first reducer 30A is in a lubricated environment.

[0069] In some embodiments, the first side plate 16A is provided with a first motor front bearing 161A, the partition plate 13 is provided with a first motor rear bearing 19A, one end of the first motor shaft 21A is fixed to the first motor front bearing 161A, and the other end of the first motor shaft 21A is fixed to the first motor rear bearing 19A, thus achieving support and fixation for the first motor shaft 21A. The first side plate 16A is also provided with a first bracket bearing 162A, and the first end cover 18A is provided with a second bracket bearing 182A. The first bracket bearing 162A and the second bracket bearing 182A are respectively connected to the first reducer 30A to support and fix the first reducer 30A.

[0070] Thus, the first side plate 16A and the partition plate 13 cooperate to support and fix the first motor shaft 21A through the first motor front bearing 161A and the first motor rear bearing 19A, respectively. The first end cover 18A and the first side plate 16A cooperate to support and fix the first reducer 30A through the first bracket bearing 162A and the second bracket bearing 182A, respectively.

[0071] In some embodiments, the housing 10 is further provided with a second oil inlet 12 and an oil supply port 14. The first oil inlet 11 and the second oil inlet 12 are spaced apart and are respectively connected to the first oil outlet and the second oil outlet of the oil cooler 60. The oil supply port 14 is connected to the oil cooling inlet of the oil cooler 60. The oil supply port 14 is located between the first oil inlet 11 and the second oil inlet 12, that is, the oil supply passage 104 is provided between the first oil inlet 11 and the second oil inlet 12. Please refer to the following: Figure 7 The housing 10 is provided with a first fuel injection pipe 105A and a second fuel injection pipe 106A. The first fuel injection pipe 105A and the second fuel injection pipe 106A are spaced apart along the outer periphery of the first motor 20A, and multiple fuel injection holes are opened on the side of the first fuel injection pipe 105A and the second fuel injection pipe 106A facing the first motor 20A. The first fuel injection pipe 105A and the second fuel injection pipe 106A are distributed at intervals on the inner wall of the first motor cavity 14A. The first fuel injection pipe 105A is connected to the first fuel inlet 11, and the second fuel injection pipe 106A is connected to the second fuel inlet 12. The first fuel injection pipe 105A and the second fuel injection pipe 106A are respectively located on the two inner walls of the first motor cavity 14A in the third direction.

[0072] For example, the partition 13 is provided with an internal oil inlet 131, and the first internal oil passage 201A and the second internal oil passage 201B are respectively connected to the internal oil inlet 131. The housing 10 is provided with a main oil passage 101, a first branch oil passage 102, and a second branch oil passage 103. One end of the main oil passage 101 is connected to the first oil inlet 11, and the other end of the main oil passage 101 is connected to the first branch oil passage 102 and the second branch oil passage 103, respectively. The first branch oil passage 102 is connected to the first fuel injection pipe 105A. The second branch oil passage 103 is connected to the internal oil inlet 131.

[0073] During cooling and lubrication, the oil cooler 60 supplies oil to the first oil inlet 11 and the second oil inlet 12 through the first oil outlet and the second oil outlet, respectively. A portion of the oil entering the first oil inlet 11 flows into the first oil injection pipe 105A through the main oil passage 101 and the first branch oil passage 102, while another portion flows into the first internal shaft oil passage 201A through the main oil passage 101, the second branch oil passage 103, and the internal shaft oil inlet hole 131. The oil entering the second oil inlet 12 flows into the second oil injection pipe 106A.

[0074] Thus, the first oil injection pipe 105A and the second oil injection pipe 106A can respectively spray oil from the inner walls of the two sides of the first motor cavity 14A in the third direction to cool the first motor 20A. Furthermore, the oil in the first motor cavity 14A enters the rear bearing 19A of the first motor through the gap between the first motor shaft 21A and the partition plate 13 to cool and lubricate the rear bearing 19A.

[0075] It is understandable that the dual oil inlet design of the first oil inlet 11 and the second oil inlet 12 allows the oil cooler 60 to output oil to the first oil injection pipe 105A and the second oil injection pipe 106A through two different oil passages, thereby reducing oil passage resistance, achieving better oil injection effect, and improving the performance of the cooling system.

[0076] like Figure 1As shown, the electric drive device in the related art typically includes a housing 1000 and an oil cooling mechanism 2000. The housing 1000 has a first side 1001 and a second side 1002. A first fuel injection pipe 1003 is built into the first side 1001, and a second fuel injection pipe 1004 is built into the second side 1002. The oil cooling mechanism 2000 is fixed to the housing 1000 and has an oil inlet and an oil outlet. The oil inlet of the oil cooling mechanism 2000 is connected to the fuel supply device through an oil inlet passage 2001. The oil outlet of the oil cooling mechanism 2000 is connected to the first fuel injection pipe 1003 through a first oil outlet passage and to the second fuel injection pipe 1004 through a second oil outlet passage.

[0077] The oil cooling mechanism 2000 typically employs a single oil inlet and a single oil outlet design. For example, the oil inlet passage 2001 of the oil cooling mechanism 2000 is located on the first side 1001 of the housing 1000 structure, the first oil outlet passage of the oil cooling mechanism 2000 is directly connected to the first fuel injection pipe 1003, and the second oil outlet passage of the oil cooling mechanism 2000 traverses the housing 1000 from the first side 1001 to connect to the second fuel injection pipe 1004 located on the second side 1002. This design not only increases the size of the housing 1000 but also makes the structure more complex, which is detrimental to structural compactness.

[0078] This application separates the first oil inlet 11 and the second oil inlet 12, and positions the oil supply passage 104 between the first oil inlet 11 and the second oil inlet 12. Compared to the design of a single oil inlet and a single oil outlet in the oil cooling mechanism 2000 in related technologies (such as...), this application achieves a significant improvement. Figure 1 As shown, this design avoids the enlargement of the housing 10 due to the oil supply passage 104 being located on the side wall of the housing 10, thus reducing the volume of the housing 10 and simplifying the side wall structure, thereby improving space utilization. On the other hand, the first oil inlet 11 can be guided to the first injection pipe 105A through the main oil passage 101 and the first branch oil passage 102, and the second oil inlet 12 can be directly guided to the second injection pipe 106A. The housing 10 does not need to have a drainage structure that crosses the oil supply passage 104, thereby optimizing the drainage structure between the first injection pipe 105A and the second injection pipe 106A, avoiding interference between the drainage structure and the oil supply passage 104, and solving the problem of oil passage arrangement at specific locations.

[0079] In some embodiments, a first diversion oil passage 107A is provided in the first side plate 16A. One end of the first diversion oil passage 107A is connected to the first fuel injection pipe 105A, and the other end of the first diversion oil passage 107A passes through the first bracket bearing 162A and the first motor front bearing 161A.

[0080] For example, the first side plate 16A is provided with a first mounting groove, a second mounting groove, and a third mounting groove. The first mounting groove accommodates a first motor front bearing 161A, the second mounting groove accommodates a first bracket bearing 162A, and the third mounting groove accommodates a first oil guide 40A. The first and second mounting grooves are respectively connected to the first diversion oil passage 107A.

[0081] Thus, a portion of the oil in the first injection pipe 105A can flow into the first diversion oil passage 107A, and through the first diversion oil passage 107A, it flows through the first support bearing 162A and the first motor front bearing 161A to cool and lubricate the first support bearing 162A and the first motor front bearing 161A.

[0082] In some embodiments, a first end cap oil passage 108A is provided inside the first end cap 18A. One end of the first end cap oil passage 108A is connected to the second fuel injection pipe 106A, and the other end of the first end cap oil passage 108A passes through the second bracket bearing 182A. For example, the first end cap oil passage 108A is provided with a fourth mounting groove, and the second bracket bearing 182A is received in the fourth mounting groove, which communicates with the first end cap oil passage 108A.

[0083] In this way, some of the oil in the second oil injection pipe 106A can flow into the first end cap oil passage 108A, and then flow through the first end cap oil passage 108A to the second support bearing 182A, so as to cool and lubricate the second support bearing 182A.

[0084] Please refer to the following: Figure 8 In some embodiments, the inner wall of the first motor cavity 14A is provided with a first oil guide groove 141A, which is recessed in a direction away from the first motor 20A. Exemplarily, the first oil guide groove 141A extends circumferentially along the housing 10 to be distributed around the periphery of the first motor 20A. Multiple first oil guide grooves 141A are respectively provided on the inner walls of the two sides of the first motor cavity 14A in a third direction, and the multiple first oil guide grooves 141A are spaced apart axially along the first motor shaft 21A.

[0085] It is understood that the first oil guide groove 141A can increase the amount of oil allowed to flow between the first motor 20A and the inner wall of the first motor cavity 14A, so as to increase the cooling area of ​​the first motor 20A, improve the motor cooling efficiency, and thus improve the peak and rated output capacity of the motor.

[0086] In some embodiments, the first motor 20A further includes a first stator assembly 23A, a first rotor 24A, and a first resolver stator 25A. The first stator assembly 23A is fixed within the first motor cavity 14A, and a gap exists between the periphery of the first stator assembly 23A and the inner wall of the first motor cavity 14A. The first stator assembly 23A is connected to the motor controller 50 via a high-voltage adapter busbar 53. The first rotor 24A is located in the middle of the first stator assembly 23A, and the first motor shaft 21A is located in the middle of the first rotor 24A. The first resolver stator 25A is located at one end of the first motor shaft 21A and is fixed to the partition plate 13. The first resolver stator 25A is connected to the motor controller 50 via a low-voltage motor connector 52.

[0087] During the operation of the first motor 20A, the first stator assembly 23A is used to generate a magnetic field, the first rotor 24A is used to output torque under the action of the magnetic field, the first motor shaft 21A outputs torque as power to the first reducer 30A, and the first resolver stator 25A is used to detect the real-time position and speed information of the first motor shaft 21A, so as to provide control feedback.

[0088] In some embodiments, a plurality of first shaft holes 221A are provided on the outer side of the first motor shaft 21A, and the plurality of first shaft holes 221A are distributed circumferentially around the first motor shaft 21A. For example, the plurality of first shaft holes 221A are all located at one end of the first motor shaft 21A close to the first reducer 30A, and the positions of the plurality of first shaft holes 221A overlap with the position of the first oil guide 40A in the axial direction of the first motor shaft 21A.

[0089] A second shaft hole 222A communicating with the first shaft inner oil passage 201A is also provided on the outer side of the first motor shaft 21A. The second shaft hole 222A and the first shaft hole 221A are spaced apart axially from each other on the first motor shaft 21A. The second shaft hole 222A is located in the middle of the first motor shaft 21A and at one end of the first motor shaft 21A near the partition plate 13. For example, there are multiple second shaft holes 222A, which are distributed circumferentially around the first motor shaft 21A. The oil in the first shaft inner oil passage 201A can be sprayed to the first stator assembly 23A through the second shaft hole 222A for cooling.

[0090] In some embodiments, the first oil guide 40A is located at one end of the first motor shaft 21A near the first reducer 30A, and the first oil guide 40A is fixed to the first side plate 16A. The first oil guide 40A has a first oil passage groove 41A communicating with the first shaft hole 221A inside, and a first oil injection hole 42A communicating with the first oil passage groove 41A is opened on the side of the first oil guide 40A facing the first reducer 30A.

[0091] For example, the first oil guide 40A is arranged in an arc shape around the circumference of the first motor shaft 21A, so that the first oil guide 40A covers the first shaft hole 221A. A first oil passage groove 41A is formed inside the first oil guide 40A, and the first oil passage groove 41A penetrates the inner side of the first oil guide 40A, so that the first oil passage groove 41A communicates with the first shaft hole 221A. There are multiple first oil injection holes 42A, and the multiple first oil injection holes 42A are arranged in a circumferentially spaced manner around the first motor shaft 21A.

[0092] Thus, after the oil in the first shaft oil passage 201A flows into the first oil channel 41A through the first shaft hole 221A, the oil in the first oil channel 41A can be sprayed through each first oil injection hole 42A to the connection between the first motor shaft 21A and the first reducer 30A, thereby improving the oil injection efficiency and cooling and lubrication efficiency.

[0093] In some embodiments, the first oil injection hole 42A is positioned at the connection point between the first motor shaft 21A and the first reducer 30A. For example, the first oil injection hole 42A is inclined in a direction close to the axis of the first reducer 30A and the first motor shaft 21A, to ensure that the oil injected from the first oil injection hole 42A can reach the tooth surface of the first reducer 30A, thus ensuring a cooling and lubrication effect.

[0094] Please refer to the following: Figure 9 In some embodiments, the first reducer 30A includes a first planetary carrier 31A, a first sun gear, a first planetary gear, a first ring gear, a first planetary gear pin 32A, and a first planetary gear bearing 33A. A first support bearing 162A and a second support bearing 182A are respectively connected to both sides of the first planetary carrier 31A to support and fix the first planetary carrier 31A. The first sun gear is located at the center of the first support 17A and meshes with the first motor shaft 21A for transmission.

[0095] Multiple first planetary gears are distributed around a first sun gear and mesh with it for transmission. A first ring gear surrounds the outer side of each first planetary gear and meshes with it. Multiple first planetary bearings 33A are provided, each corresponding to one of the first planetary gears. Each first planetary bearing 33A is a needle roller bearing, positioned at the center of its corresponding first planetary gear, with its outer ring fixed to the first planetary gear.

[0096] Multiple first planetary gear pins 32A are provided, each corresponding to a plurality of first planetary gear bearings 33A. The first planetary gear pins 32A pass through and are fixed to the inner ring of the first planetary gear bearings 33A. Thus, the first planetary gear pins 32A are rotatably connected to the first planetary gears via the first planetary gear bearings 33A, and the first planetary gear pins 32A and the first planetary gear bearings 33A cooperate to support and fix the first planetary gears.

[0097] The first planetary gear pin 32A has a first pin oil passage 301A that communicates with the first end cover oil passage 108A. The first planetary gear pin 32A has a first pin hole 321A that communicates with the first pin oil passage 301A on its outer side. The first end cover 18A has a first oil guide nozzle 70A that is connected to the inner side of the first planetary gear pin 32A. The first end cover 18A has a first oil passage hole 183A that is connected to the first end cover oil passage 108A at one end and passes through the first oil guide nozzle 70A at the other end.

[0098] For example, the first oil guide nozzle 70A is hollow inside and has a first section and a second section, which are perpendicular to each other. The first section is fixed to the inner side of the first end cap 18A, and the first oil passage hole 183A is inclined toward the first section and communicates with the first section. The second section is located at the end of the first section away from the first oil passage hole 183A, and the second section is embedded in the inner side of the first planetary gear pin 32A.

[0099] Thus, some of the oil in the first end cover oil passage 108A can be sprayed through the first oil passage 183A to the first oil guide nozzle 70A. Under the centrifugal force generated by the rotation of the first reducer 30A, the oil flows into the first pin shaft oil passage 301A and is sprayed through the first pin shaft hole 321A to the first planetary gear bearing 33A to cool and lubricate the first planetary gear bearing 33A.

[0100] In this embodiment, the positions and connections of the first motor 20A, the first reducer 30A, and the first oil guide 40A are arranged symmetrically with the positions and connections of the second motor 20B, the second reducer 30B, and the second oil guide 40B.

[0101] Specifically, a second side plate 16B is also provided inside the housing 10. The second side plate 16B is located on the side of the housing 10 away from the first side plate 16A. The second side plate 16B and the partition plate 13 define a second motor cavity 14B. A second bracket 17B and a second end cap 18B are provided on the side of the housing 10 near the second side plate 16B. A second reducer cavity 15B is formed inside the second bracket 17B. The second reducer 30B is fixed inside the second bracket 17B. The second side plate 16B separates the second motor cavity 14B and the second reducer cavity 15B. A second oil guide 40B is fixed to the second side plate 16B. One end of the second motor shaft 21B passes through the second side plate 16B and enters the second reducer cavity 15B.

[0102] The second end cap 18B is disposed on one side of the second bracket 17B, and the second end cap 18B, together with the second bracket 17B, supports and fixes the second reducer 30B. The second end cap 18B is provided with a second oil seal 181B, which prevents oil leakage from the inside of the second reducer cavity 15B, and at the same time blocks external contaminants such as mud and water vapor from entering the second reducer cavity 15B, ensuring that the second reducer 30B is in a lubricated environment.

[0103] In some embodiments, the second side plate 16B is provided with a second motor front bearing 161B, the partition 13 is provided with a second motor rear bearing 19B, one end of the second motor shaft 21B is fixed to the second motor front bearing 161B, and the other end of the second motor shaft 21B is fixed to the second motor rear bearing 19B, thus supporting and fixing the second motor shaft 21B. The second side plate 16B is also provided with a third support bearing 162B, and the second end cover 18B is provided with a fourth support bearing 182B. The third support bearing 162B and the fourth support bearing 182B are respectively connected to the second reducer 30B to support and fix the second reducer 30B.

[0104] Thus, the second side plate 16B and the partition plate 13 cooperate to support and fix the second motor shaft 21B through the second motor front bearing 161B and the second motor rear bearing 19B, respectively. The second end cover 18B and the second side plate 16B cooperate to support and fix the second reducer 30B through the third bracket bearing 162B and the fourth bracket bearing 182B, respectively.

[0105] In some embodiments, a third fuel injection pipe 105B and a fourth fuel injection pipe 106B are provided inside the housing 10. The third fuel injection pipe 105B and the fourth fuel injection pipe 106B are spaced apart along the outer periphery of the second motor 20B, and the third fuel injection pipe 105B and the fourth fuel injection pipe 106B have multiple fuel injection holes on the side facing the second motor 20B. The third fuel injection pipe 105B and the fourth fuel injection pipe 106B are spaced apart on the inner wall of the second motor cavity 14B.

[0106] For example, the third fuel injection pipe 105B and the fourth fuel injection pipe 106B are located on the inner walls of the first motor cavity 14A in the third direction, respectively. The third fuel injection pipe 105B and the second fuel injection pipe 106A are the same fuel pipe, and the fourth fuel injection pipe 106B and the second fuel injection pipe 106A are the same fuel pipe, so that the third fuel injection pipe 105B is connected to the first fuel inlet 11, and the fourth fuel injection pipe 106B is connected to the second fuel inlet 12.

[0107] During cooling and lubrication, the oil cooler 60 supplies oil to the first oil inlet 11 and the second oil inlet 12 through the first oil outlet and the second oil outlet, respectively. A portion of the oil entering the first oil outlet flows into the third oil injection pipe 105B through the main oil passage 101 and the first branch oil passage 102, while another portion flows into the second internal shaft oil passage 201B through the main oil passage 101, the second branch oil passage 103, and the internal shaft inlet hole 131. The oil entering the second oil outlet flows into the third oil injection pipe 105B through the second branch oil passage 103.

[0108] Thus, the third fuel injection pipe 105B and the fourth fuel injection pipe 106B can respectively spray oil onto the second motor 20B from the inner walls of the second motor cavity 14B in the third direction for cooling. Furthermore, the oil in the second motor cavity 14B enters the rear bearing 19B of the second motor through the gap between the second motor shaft 21B and the partition plate 13 to cool and lubricate the rear bearing 19B.

[0109] In some embodiments, a second diversion oil passage 107B is provided in the second side plate 16B. One end of the second diversion oil passage 107B is connected to the third oil injection pipe 105B, and the other end of the second diversion oil passage 107B passes through the third bracket bearing 162B and the second motor front bearing 161B.

[0110] For example, the second side plate 16B is provided with a first fixing groove, a second fixing groove, and a third fixing groove. The first fixing groove accommodates the second motor front bearing 161B, the second fixing groove accommodates the fourth bracket bearing 182B, and the third fixing groove accommodates the second oil guide 40B. The first fixing groove and the second fixing groove are respectively connected to the second diversion oil passage 107B.

[0111] In this way, some of the oil in the third oil injection pipe 105B can flow into the second diversion oil passage 107B, and then flow through the second diversion oil passage 107B to the third support bearing 162B and the second motor front bearing 161B, so as to cool and lubricate the third support bearing 162B and the second motor front bearing 161B.

[0112] In some embodiments, a second end cap oil passage 108B is provided within the second end cap 18B. One end of the second end cap oil passage 108B is connected to the fourth oil injection pipe 106B, and the other end of the second end cap oil passage 108B passes through the fourth bracket bearing 182B. For example, the second end cap oil passage 108B is provided with a fourth fixing groove, in which the fourth bracket bearing 182B is received, and the fourth fixing groove communicates with the second end cap oil passage 108B.

[0113] In this way, some of the oil in the fourth oil injection pipe 106B can flow into the second end cap oil passage 108B, and then flow through the second end cap oil passage 108B to the fourth support bearing 182B, so as to cool and lubricate the fourth support bearing 182B.

[0114] In some embodiments, the inner wall of the second motor cavity 14B is provided with a second oil guide groove, which is recessed in a direction away from the second motor 20B. Exemplarily, the second oil guide groove is symmetrically arranged with the first oil guide groove 141A, and extends circumferentially along the housing 10 to surround the periphery of the second motor 20B. Multiple second oil guide grooves are provided on both inner walls of the second motor cavity 14B in a third-direction direction, and these multiple second oil guide grooves are spaced apart axially along the second motor shaft 21B.

[0115] It is understandable that the second oil guide groove can increase the amount of oil allowed to flow between the inner walls of the second motor 20B and the second motor cavity 14B, thereby increasing the cooling area of ​​the second motor 20B, improving the motor cooling efficiency, and thus improving the peak and rated output capacity of the motor.

[0116] In some embodiments, the second motor 20B further includes a second stator assembly 23B, a second rotor 24B, and a second resolver stator 25B. The second stator assembly 23B is fixed within the second motor cavity 14B, and a gap exists between the periphery of the second stator assembly 23B and the inner wall of the second motor cavity 14B. The second stator assembly 23B is connected to the motor controller 50 via a high-voltage adapter busbar 53. The second rotor 24B is located in the middle of the second stator assembly 23B, and the second motor shaft 21B is located in the middle of the second rotor 24B. The second resolver stator 25B is located at one end of the second motor shaft 21B and is fixed to the partition plate 13. The second resolver stator 25B is connected to the motor controller 50 via a low-voltage motor connector 52.

[0117] During the operation of the second motor 20B, the second stator assembly 23B is used to generate a magnetic field, the second rotor 24B is used to output torque under the action of the magnetic field, the second motor shaft 21B outputs torque as power to the second reducer 30B, and the second resolver stator 25B is used to detect the real-time position and speed information of the second motor shaft 21B to provide control feedback.

[0118] In some embodiments, a plurality of third shaft holes 221B are provided on the outer side of the second motor shaft 21B, and the plurality of third shaft holes 221B are distributed circumferentially around the second motor shaft 21B. For example, the plurality of third shaft holes 221B are all located at one end of the second motor shaft 21B close to the second reducer 30B, and the positions of the plurality of third shaft holes 221B overlap with the position of the second oil guide 40B in the axial direction of the second motor shaft 21B.

[0119] A fourth shaft hole 222B communicating with the oil passage 201B inside the second shaft is also provided on the outer side of the second motor shaft 21B. The fourth shaft hole 222B and the third shaft hole 221B are spaced apart axially on the second motor shaft 21B. The fourth shaft hole 222B is located in the middle of the second motor shaft 21B and at one end of the second motor shaft 21B near the partition plate 13. For example, there are multiple fourth shaft holes 222B, which are distributed circumferentially around the second motor shaft 21B. The oil in the oil passage 201B inside the second shaft can be sprayed to the second stator assembly 23B through the fourth shaft hole 222B for cooling.

[0120] In some embodiments, the second oil guide 40B is located at one end of the second motor shaft 21B near the second reducer 30B, and the second oil guide 40B is fixed to the second side plate 16B. The structure of the second oil guide 40B is symmetrical to the structure of the first oil guide 40A.

[0121] Specifically, the second oil guide 40B has a second oil passage groove 41B inside, and the second oil guide 40B has a second oil injection hole 42B that communicates with the second oil passage groove 42B on the side facing the second reducer 30B.

[0122] For example, the second oil guide 40B is arranged in an arc shape around the circumference of the second motor shaft 21B, so that the second oil guide 40B covers the third shaft hole 221B. A second oil passage groove 41B is formed inside the second oil guide 40B, and the second oil passage groove 41B penetrates the inner side of the second oil guide 40B, so that the second oil passage groove 41B communicates with the third shaft hole 221B. There are multiple second oil injection holes 42B, and the multiple second oil injection holes 42B are circumferentially spaced around the second motor shaft 21B.

[0123] Thus, after the oil in the second shaft inner oil passage 201B flows into the second oil channel 41B through the third shaft hole 221B, the oil in the first oil channel 41B can be sprayed through each of the second oil injection holes 42B to the connection between the second motor shaft 21B and the second reducer 30B, thereby improving the oil injection efficiency and cooling and lubrication efficiency.

[0124] In some embodiments, the second oil injection hole 42B is positioned at the connection point between the second motor shaft 21B and the second reducer 30B. For example, the second oil injection hole 42B is inclined in a direction close to the axis of the second reducer 30B and the second motor shaft 21B, to ensure that the oil injected from the second oil injection hole 42B can reach the tooth surface of the second reducer 30B, thus ensuring a cooling and lubrication effect.

[0125] Please refer to the following: Figure 10 In some embodiments, the second reducer 30B is symmetrically arranged with the first reducer 30A. The second reducer 30B includes a second planetary carrier 31B, a second sun gear, a second planetary gear, a second ring gear, a second planetary gear pin 32B, and a second planetary gear bearing 33B. A third support bearing 162B and a fourth support bearing 182B are respectively connected to both sides of the second planetary carrier 31B to support and fix it. The second sun gear is located at the center of the second support 17B and meshes with the second motor shaft 21B for transmission.

[0126] Multiple second planetary gears are distributed around and mesh with the second sun gear. A second ring gear surrounds the outer side of each second planetary gear and meshes with it. Multiple second planetary gear bearings 33B are provided, corresponding to the respective second planetary gears. Each second planetary gear bearing 33B is positioned at the center of its corresponding second planetary gear, and its outer ring is fixed to the second planetary gear.

[0127] Multiple second planetary gear pins 32B are provided, each corresponding to a multiple second planetary gear bearings 33B. The second planetary gear bearings 33B are needle roller bearings, and the second planetary gear pins 32B pass through and are fixed to the inner ring of each bearing. Thus, the second planetary gear pins 32B are rotatably connected to the second planetary gears via the second planetary gear bearings 33B, and the cooperation between the second planetary gear pins 32B and the second planetary gear bearings 33B supports and fixes the second planetary gears.

[0128] The second planetary gear pin 32B has a second pin oil passage 301B that communicates with the second end cover oil passage 108B. A second pin hole 321B that communicates with the second pin oil passage 301B is opened on the outer side of the second planetary gear pin 32B. The second end cover 18B is provided with a second oil guide nozzle 70B, which is connected to the inner side of the second planetary gear pin 32B. The second end cover 18B has a second oil passage 183B, one end of which communicates with the second end cover oil passage 108B, and the other end of which passes through the second oil guide nozzle 70B.

[0129] For example, the second oil guide nozzle 70B is hollow inside and has a first section and a second section, which are perpendicular to each other. The first section is fixed to the inside of the second end cap 18B, and the second oil passage hole 183B is inclined toward the first section and communicates with the first section. The second section is located at the end of the first section away from the second oil passage hole 183B, and the second section is embedded in the inside of the second planetary gear pin 32B.

[0130] Thus, some of the oil in the second end cover oil passage 108B can be sprayed through the second oil passage 183B to the second oil guide nozzle 70B. Under the centrifugal force generated by the rotation of the second reducer 30B, the oil flows into the second pin shaft oil passage 301B and is sprayed through the second pin shaft hole 321B to the second planetary gear bearing 33B to cool and lubricate the second planetary gear bearing 33B.

[0131] For ease of understanding, the working principle of each cooling and lubrication circuit is explained below by way of example.

[0132] The electronic pump assembly 61 generates negative pressure, drawing oil from the oil supply device into the suction filter 62. The oil drawn into the suction filter 62 then enters the electronic pump assembly 61 and is pumped to the oil cooler 60 through the oil supply passage 104. After being cooled, the oil in the oil cooler 60 is discharged in two separate streams, one through the first oil outlet and the other through the second oil outlet.

[0133] One stream of oil from the oil cooler 60 flows into the first oil inlet 11 from the first oil outlet. A portion of the oil from the first oil inlet 11 flows into the first oil injection pipe 105A and the third oil injection pipe 105B. A portion of the oil from the first oil injection pipe 105A is directly sprayed into the first motor cavity 14A, cooling the coils on both sides and the silicon steel sheet in the middle of the first stator assembly 23A. Another portion of the oil from the first oil injection pipe 105A flows through the first branch oil passage 107A, passing through the first support bearing 162A and the first motor front bearing 161A to cool and lubricate them.

[0134] A portion of the oil from the third oil injection pipe 105B is sprayed onto the two side coils and the middle silicon steel sheet of the second stator assembly 23B for cooling. Another portion of the oil from the third oil injection pipe 105B flows through the second branch oil passage 107B through the third support bearing 162B and the second motor front bearing 161B to cool and lubricate the third support bearing 162B and the second motor front bearing 161B.

[0135] Another portion of the oil from the first oil inlet 11 flows into the first internal shaft oil passage 201A and the second internal shaft oil passage 201B through the internal shaft oil inlet 131. A portion of the oil in the first internal shaft oil passage 201A is sprayed through the first shaft hole 221A to the first oil guide 40A, and then through the first oil guide 40A to the connection between the first motor shaft 21A and the first reducer 30A. The remaining portion of the oil in the first internal shaft oil passage 201A is sprayed through the second shaft hole 222A to the two coils on both sides of the first stator assembly 23A for cooling.

[0136] A portion of the oil in the second shaft inner oil passage 201B is sprayed through the third shaft hole 221B to the second oil guide 40B, and then sprayed through the second oil guide 40B to the connection between the second motor shaft 21B and the second reducer 30B. Another portion of the oil in the second shaft inner oil passage 201B is sprayed through the fourth shaft hole 222B to the two coils on both sides of the second stator assembly 23B for cooling.

[0137] Another oil stream from the oil cooler 60 flows from the second oil outlet into the second oil inlet 12, and the oil from the second oil inlet 12 flows into the second oil injection pipe 106A and the fourth oil injection pipe 106B. A portion of the oil from the second oil injection pipe 106A is directly sprayed into the first motor cavity 14A, and sprayed onto the two side coils and the middle silicon steel sheet of the first stator assembly 23A for cooling. The other portion of the oil from the second oil injection pipe 106A flows to the first end cover oil passage 108A.

[0138] A portion of the oil in the first end cap oil passage 108A flows through the second support bearing 182A to cool and lubricate it. Another portion of the oil in the first end cap oil passage 108A flows into the first pin shaft oil passage 301A through the first oil passage 183A and the first oil guide nozzle 70A, and is then sprayed through the first pin shaft hole 321A onto the first planetary gear bearing 33A to cool and lubricate it.

[0139] A portion of the oil from the fourth oil injection pipe 106B is directly injected into the second motor cavity 14B and sprayed onto the two side coils and the middle silicon steel sheet of the second stator assembly 23B for cooling. Another portion of the oil from the fourth oil injection pipe 106B flows to the second end cover oil passage 108B.

[0140] A portion of the oil in the second end cap oil passage 108B flows through the fourth support bearing 182B to cool and lubricate it. Another portion of the oil in the second end cap oil passage 108B flows through the second oil passage 183B and the second oil guide nozzle 70B into the second pin shaft oil passage 301B, and is then sprayed through the second pin shaft hole 321B onto the second planetary gear bearing 33B to cool and lubricate it.

[0141] Part of the oil in the first motor cavity 14A can flow through the gap between the first motor shaft 21A and the partition 13 and pass through the first motor rear bearing 19A for cooling and lubrication. Part of the oil in the second motor cavity 14B can flow through the gap between the second motor shaft 21B and the partition 13 and pass through the second motor rear bearing 19B for cooling and lubrication.

[0142] In this way, the first motor 20A, the second motor 20B and their corresponding transmission mechanisms can all be cooled and lubricated.

[0143] This application also provides a vehicle. The vehicle includes a body, wheels, and an electric drive unit. The electric drive unit is fixed to the body, and the wheels are connected to the electric drive unit. The electric drive unit drives the corresponding wheels to rotate, thereby enabling the vehicle to move.

[0144] The implementation principle and beneficial effects of the vehicle provided in this application can be specifically seen in the relevant description of the electric drive device in the foregoing embodiments, and this application does not limit it.

[0145] This application is not limited to the specific embodiments described above. Those skilled in the art will readily understand that many alternative solutions exist for the test fixture without departing from the principles and scope of this application. The scope of protection of this application is determined by the claims.

Claims

1. An electric drive device, characterized in that, The electric drive device includes: The housing has a first oil inlet and an interior containing a first motor cavity and a first reducer cavity; A first motor is disposed in the first motor cavity and has a first motor shaft. The first motor shaft has a first internal oil passage communicating with the first oil inlet, and a first shaft hole communicating with the first internal oil passage is opened on the outside of the first motor shaft. A first reducer is disposed inside the first reducer cavity, and the first reducer is connected to the first motor shaft via a transmission. The first oil guide is disposed at one end of the first motor shaft near the first reducer and located at the first shaft hole; part of the oil from the first oil inlet flows to the first shaft hole through the oil passage inside the first shaft, and the first oil guide is used to spray the oil at the first shaft hole to the connection between the first motor shaft and the first reducer.

2. The electric drive device according to claim 1, characterized in that, The first oil guide component has a first oil passage groove inside that communicates with the first shaft hole, and the first oil guide component has a first oil injection hole on the side facing the first reducer that communicates with the first oil passage groove.

3. The electric drive device according to claim 1, characterized in that, The housing is also provided with a second oil inlet. The first oil inlet and the second oil inlet are distributed at intervals. The first oil inlet and the second oil inlet are respectively used to communicate with the oil outlet of the oil cooler. The housing is provided with a first fuel injection pipe and a second fuel injection pipe, which are arranged at intervals along the outer periphery of the first motor. The first fuel injection pipe is connected to the first fuel inlet, and the second fuel injection pipe is connected to the second fuel inlet.

4. The electric drive device according to claim 3, characterized in that, The housing is provided with a first side plate, which separates the first motor cavity and the first reducer cavity. One end of the first motor shaft passes through the first side plate and enters the first reducer cavity. The first side plate is provided with a first bracket bearing and a first motor front bearing. The first bracket bearing is connected to the first reducer, and the first motor front bearing supports the first motor shaft. The first oil guide is provided on the side of the first side plate facing the first reducer cavity. The first side plate is provided with a first oil diversion channel. One end of the first oil diversion channel is connected to the first fuel injection pipe, and the other end of the first oil diversion channel passes through the first bracket bearing and the first motor front bearing.

5. The electric drive device according to claim 3, characterized in that, The electric drive device also includes a first end cover, the first end cover is provided with a second bracket bearing, and the second bracket bearing is connected to the first reducer. The first end cap is provided with a first end cap oil passage. One end of the first end cap oil passage is connected to the second oil injection pipe, and the other end of the first end cap oil passage passes through the second bracket bearing.

6. The electric drive device according to claim 5, characterized in that, The first reducer includes a first planetary gear pin and a first planetary gear bearing. The first planetary gear pin passes through the inner ring of the first planetary gear bearing. The first planetary gear pin has a first pin oil passage that communicates with the first end cover oil passage. The first planetary gear pin has a first pin hole that communicates with the first pin oil passage on its outer side. The first end cover is provided with a first oil guide nozzle, which is connected to the inner side of the first planetary gear pin. The first end cover is provided with a first oil passage hole, one end of which is connected to the oil passage of the first end cover, and the other end of which passes through the first oil guide nozzle.

7. The electric drive device according to claim 4, characterized in that, A partition is provided inside the housing, and the partition and the first side plate define the first motor cavity. The partition is provided with a first motor rear bearing, which cooperates with the first motor front bearing to support the first motor shaft. Some of the oil inside the first motor cavity flows into the rear bearing of the first motor through the gap between the first motor shaft and the partition.

8. The electric drive device according to claim 3, characterized in that, The housing is also provided with an oil supply channel, which is used to communicate with the oil cooling inlet of the oil cooler. The oil supply channel is located between the first oil inlet and the second oil inlet.

9. The electric drive device according to claim 1, characterized in that, The inner wall of the first motor cavity is provided with a first oil guide groove, which is recessed in a direction away from the first motor.

10. The electric drive device according to any one of claims 1 to 9, characterized in that, The electric drive device also includes a second motor, a second reducer, and a second oil guide component; The housing also has a second motor cavity and a second reducer cavity inside; The second motor is disposed in the second motor cavity and has a second motor shaft coaxially disposed with the first motor shaft. The second motor shaft has a second internal oil passage communicating with the first oil inlet, and a third shaft hole communicating with the second internal oil passage is opened on the outside of the second motor shaft. The second reducer is disposed inside the second reducer cavity, and the second reducer is connected to the shaft of the second motor via a transmission. The second oil guide is disposed at one end of the second motor shaft near the second reducer and located at the third shaft hole; part of the oil from the first oil inlet flows through the oil passage inside the second shaft to the third shaft hole, and the second oil guide is used to spray the oil at the third shaft hole to the connection between the second motor shaft and the second reducer.

11. A vehicle, characterized in that, The vehicle includes a vehicle body, wheels, and an electric drive unit as described in any one of claims 1 to 10, the electric drive unit being fixed to the vehicle body, and the wheels being connected to the electric drive unit.

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