Dual motor assembly, powertrain, and vehicle

Abstract

A vehicle, comprising a dual motor assembly and a powertrain. The dual motor assembly comprises: a first channel, wherein the first channel is used for flowing a cooling medium; and a first motor and a second motor, wherein the first motor and the second motor comprise an intermediate shaft, the intermediate shaft serves as motor shafts of the first motor and the second motor, the intermediate shaft is provided with a second channel, and the second channel is communicated with the first channel.

Description

Dual-motor assembly, power assembly and vehicle

[0001] The present application claims priority to the Chinese patent publication with the publication number 2024224151040, the title of "Dual-motor assembly, power assembly and vehicle", which was filed on September 30, 2024, in the China Patent Office, the entire content of which is incorporated herein by reference. TECHNICAL FIELD

[0002] The present application relates to, but is not limited to, the motor technical field, in particular to a dual-motor assembly, a power assembly and a vehicle. BACKGROUND

[0003] As a type of driving motor, the dual-motor assembly has become the focus of many electric drive assembly manufacturers due to its high integration and good high-speed performance. However, because of the high integration of the dual-motor assembly, the dual-motor assembly generates more heat during high-speed operation, which may cause demagnetization of the magnetic steel at high temperature. Therefore, it is necessary to cool the dual-motor assembly at high speed.

[0004] In related technologies, the dual-motor assembly cooling method has the problem of unreasonable cooling flow path planning, complex structure, and large space occupation. SUMMARY

[0005] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, a dual-motor assembly, a power assembly and a vehicle are proposed, which can at least reduce the volume of the dual-motor assembly.

[0006] In a first aspect, the present application provides a switching device, comprising:

[0007] a first channel for flowing a cooling medium; and

[0008] a first motor and a second motor, the first motor and the second motor comprising an intermediate shaft, the intermediate shaft being a motor shaft of the first motor and the second motor, the intermediate shaft being provided with a second channel, the second channel being in communication with the first channel.

[0009] In some embodiments of the present application, the first channel is arranged between the first motor and the second motor.

[0010] In some embodiments of the present application, the first motor and the second motor are arranged coaxially.

[0011] In some embodiments of the present application, the dual-motor assembly further comprises an on-off device arranged on the first channel, for controlling the flow of the cooling medium in the first channel.

[0012] In some embodiments of the present application, the intermediate shafts include a first intermediate shaft and a second intermediate shaft, the first motor includes a first rotor, and the second motor includes a second rotor, the first rotor being sleeved on the first intermediate shaft, and the second rotor being sleeved on the second intermediate shaft.

[0013] In some embodiments of the present application, the first intermediate shaft is provided with a third channel, and the second intermediate shaft is provided with a fourth channel.

[0014] In some embodiments of the present application, the first intermediate shaft is provided with a first oil outlet hole, one end of the first oil outlet hole being in communication with the third channel, and the other end of the first oil outlet hole penetrating through a side wall surface of the first intermediate shaft; and / or, the second intermediate shaft is provided with a second oil outlet hole, one end of the second oil outlet hole being in communication with the fourth channel, and the other end of the second oil outlet hole penetrating through a side wall surface of the second intermediate shaft.

[0015] In some embodiments of the present application, the number of the first oil outlet holes is a plurality; and / or, the number of the second oil outlet holes is a plurality.

[0016] In some embodiments of the present application, the double-motor assembly further includes a housing, and the end plate is provided on the housing.

[0017] In some embodiments of the present application, the first motor includes a first end plate and a second end plate, the first end plate and the second end plate are respectively provided with a first end plate flow channel and a second end plate flow channel, one end of the first end plate flow channel being in communication with the first oil outlet hole, and the other end of the first end plate flow channel being connected with the first rotor; and / or, one end of the second end plate flow channel being in communication with the first oil outlet hole, and the other end of the second end plate flow channel being in communication with the second rotor.

[0018] In some embodiments of the present application, the first end plate flow channel includes a first end plate liquid inlet flow channel and a first end plate liquid outlet flow channel, and the second end plate flow channel includes a second end plate liquid inlet flow channel and a second end plate liquid outlet flow channel.

[0019] In some embodiments of the present application, the second motor includes a third end plate and a fourth end plate, the third end plate and the fourth end plate are respectively provided with a third end plate flow channel and a fourth end plate flow channel, one end of the third end plate flow channel being in communication with the second oil outlet hole, and the other end of the third end plate flow channel being connected with the second rotor; and / or, one end of the fourth end plate flow channel being in communication with the second oil outlet hole, and the other end of the fourth end plate flow channel being in communication with the second rotor.

[0020] In some embodiments of the present application, the third end plate flow channel includes a third end plate liquid inlet flow channel and a third end plate liquid outlet flow channel, and the fourth end plate flow channel includes a fourth end plate liquid inlet flow channel and a fourth end plate liquid outlet flow channel.

[0021] In some embodiments of the present application, the first rotor is provided with a fifth channel, one end of the fifth channel being in communication with the liquid inlet flow channel of the first end plate, and the other end being in communication with the liquid outlet flow channel of the second end plate; and / or, one end of the fifth channel being in communication with the liquid inlet flow channel of the second end plate, and the other end being in communication with the liquid outlet flow channel of the first end plate.

[0022] The second rotor is provided with a sixth channel, one end of the sixth channel being in communication with the liquid inlet flow channel of the third end plate, and the other end being in communication with the liquid outlet flow channel of the fourth end plate; and / or, one end of the sixth channel being in communication with the liquid inlet flow channel of the fourth end plate, and the other end being in communication with the liquid outlet flow channel of the third end plate.

[0023] In some embodiments of the present application, the dual-motor assembly further comprises a liquid inlet channel, the liquid inlet channel being in communication with the first channel.

[0024] In some embodiments of the present application, the middle region of the liquid inlet channel is in communication with the first channel.

[0025] In some embodiments of the present application, the on-off device is arranged at a position where the liquid inlet channel is in communication with the first channel.

[0026] In some embodiments of the present application, the first channel comprises a main channel and a branch channel, the dual-motor assembly further comprises a liquid inlet channel, the main channel being in communication with the liquid inlet channel, and the branch channel being in communication with the third channel and the fourth channel respectively.

[0027] In some embodiments of the present application, the dual-motor assembly further comprises a housing, and the first channel is arranged on the housing.

[0028] In some embodiments of the present application, the liquid inlet channel is arranged on the housing.

[0029] In some embodiments of the present application, the dual-motor assembly further comprises a housing, and the housing is provided with a liquid return channel, the liquid return channel being arranged below the housing, and the cooling medium flowing out through the fifth channel and / or the sixth channel being adapted to enter an oil return cavity through the liquid return channel after falling below the housing.

[0030] In some embodiments of the present application, the first intermediate shaft is provided with a first gear away from the end of the first channel, and the first gear is integrally formed with the first intermediate shaft; and / or, the second intermediate shaft is provided with a second gear away from the end of the first channel, and the second gear is integrally formed with the second intermediate shaft.

[0031] In a second aspect, the present application provides a power assembly comprising the above-mentioned dual-motor assembly.

[0032] In some embodiments of the present application, an oil return cavity, a pump and an oil cooler are included, the pump and the oil cooler are mounted on the housing, a first end of the pump is connected with the oil return cavity, a second end of the pump is connected with the oil cooler, and the other end of the oil cooler is connected with the liquid inlet channel.

[0033] In a third aspect, the present application provides a vehicle comprising the power assembly.

[0034] The above scheme, the double-motor assembly comprises a first motor and a second motor, the first motor and the second motor are coaxially arranged; a first channel, the first channel is used for flowing cooling medium; and an intermediate shaft, the intermediate shaft is a motor shaft of the first motor and the second motor, the intermediate shaft is provided with a second channel, and the second channel is in communication with the first channel.

[0035] The double-motor assembly of the present application comprises: a first channel, the first channel is used for flowing cooling medium; and a first motor and a second motor, the first motor and the second motor comprise an intermediate shaft, the intermediate shaft is a motor shaft of the first motor and the second motor, and the intermediate shaft is provided with a second channel, and the second channel is in communication with the first channel. The motor is cooled by the cooling medium flowing out of the first channel and then flowing into the second channel provided on the intermediate shaft. The cooling flow path is simple in arrangement, and the volume of the double-motor assembly is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0036] Other features, objects and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments thereof, read in conjunction with the accompanying drawings:

[0037] FIG. 1 is a structural schematic diagram of a motor according to an embodiment of the present application;

[0038] FIG. 2 is a sectional view of the end plate in FIG. 1;

[0039] FIG. 3 is a structural schematic diagram of a power assembly according to an embodiment of the present application;

[0040] FIG. 4 is a structural schematic diagram of a vehicle according to an embodiment of the present application.

[0041] Explanation of reference signs: 1, dual-motor assembly; 2, first motor; 3, second motor; 4, first channel; 41, main channel; 42, branch channel; 5, intermediate shaft; 6, second channel; 7, on-off device; 8, first intermediate shaft; 9, second intermediate shaft; 10, first rotor; 11, second rotor; 12, third channel; 13, fourth channel; 14, first oil outlet hole; 15, second oil outlet hole; 16, first end plate; 17, second end plate; 18, third end plate; 19, fourth end plate; 20, first end plate flow channel; 21, second end plate flow channel; 22, third end plate flow channel; 23, fourth end plate flow channel; 24, first end plate liquid inlet flow channel; 25, first end plate liquid outlet flow channel; 26, second end plate liquid inlet flow channel; 27, second end plate liquid outlet flow channel; 28, third end plate liquid inlet flow channel; 29, third end plate liquid outlet flow channel; 30, fourth end plate liquid inlet flow channel; 31, fourth end plate liquid outlet flow channel; 32, fifth channel; 33, sixth channel; 34, liquid inlet channel; 35, housing; 37, first gear; 38, second gear; 39, oil cooler; 200, power assembly; H, vehicle. DETAILED DESCRIPTION

[0042] The application will be further described below in detail with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the related utility model, and are not a limitation on the utility model. In addition, it should be noted that only parts related to the utility model are shown in the drawings for ease of description.

[0043] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and embodiments.

[0044] As shown in FIGS. 1-4, the embodiments of the present application provide a dual-motor assembly, a power assembly and a vehicle.

[0045] As shown in FIG. 1, the dual-motor assembly 1 provided by the embodiments of the present application comprises:

[0046] The first channel 4 is used for flowing cooling medium; and

[0047] The first motor 2 and the second motor 3 comprise an intermediate shaft 5, the intermediate shaft 5 is a motor shaft of the first motor 2 and the second motor 3, the intermediate shaft 5 is provided with a second channel 6, and the second channel 6 is in communication with the first channel 4.

[0048] In some embodiments, the double-motor assembly comprises a first channel 4 for flowing of a cooling medium, and further comprises a first motor 2 and a second motor 3, the first motor 2 and the second motor 3 comprising an intermediate shaft 5 as an intermediate rotating shaft of the first motor 2 and the second motor 3, and the intermediate shaft 5 is internally provided with a second channel 6, the first channel 4 and the second channel 6 being in communication, the cooling medium flowing into the second channel 6 through the first channel 4 to realize cooling of the intermediate shaft 5 and further cooling of the double-motor assembly. According to the application, the cooling medium flows into the second channel 6 provided in the intermediate shaft 5 after flowing out of the first channel 4, the cooling flow path is simple, and the volume of the double-motor assembly is reduced while realizing cooling of the double-motor assembly.

[0049] In some embodiments, the first motor 2 and the second motor 3 are coaxially arranged.

[0050] In some embodiments, the first motor 2 and the second motor 3 of the double-motor assembly are coaxial, that is, the first motor 2 and the second motor 3 are sequentially arranged together in a coaxial manner.

[0051] In some embodiments, the first channel 4 is arranged between the first motor 2 and the second motor 3, the cooling medium flows into the second channel 6 provided in the intermediate shaft 5 after flowing out of the first channel 4, and the uniform distribution of the cooling medium in the intermediate shaft 5 is ensured, and the cooling effect of the motor is improved.

[0052] In some embodiments, the double-motor assembly further comprises an on-off device 7 arranged on the first channel 4 and used for controlling the flow of the cooling medium in the first channel 4.

[0053] In some embodiments, the on-off device 7 can be an electromagnetic valve or other elements capable of achieving the functions of cutting off and flowing, and more specifically, the on-off device 7 is arranged on the first channel 4 to realize control of the flow direction of the cooling medium flowing through the first channel 4.

[0054] The intermediate shaft 5 comprises a first intermediate shaft 8 and a second intermediate shaft 9, the first motor 2 comprises a first rotor 10, and the second motor 3 comprises a second rotor 11, the first rotor 10 being sleeved on the first intermediate shaft 8, and the second rotor 11 being sleeved on the second intermediate shaft 9.

[0055] In some embodiments, the first intermediate shaft 8 is press-fitted together with the first rotor 10, and the second intermediate shaft 9 is press-fitted together with the second rotor 11.

[0056] In some embodiments, the first intermediate shaft 8 is press-fitted together with the first rotor 10 through a spline, and the second intermediate shaft 9 is press-fitted together with the second rotor 11 through a spline.

[0057] The first intermediate shaft 8 is provided with a third channel 12, and the second intermediate shaft 9 is provided with a fourth channel 13. In some embodiments, the first intermediate shaft 8 is internally provided with a third flow channel 12, one end of which penetrates the first intermediate shaft 8; and the second intermediate shaft 9 is internally provided with a fourth flow channel, one end of which penetrates the second intermediate shaft 9.

[0058] The first intermediate shaft 8 is provided with a first oil outlet hole 14, one end of which communicates with the third channel 12, and the other end penetrates the side wall surface of the first intermediate shaft 8; and / or, the second intermediate shaft 9 is provided with a second oil outlet hole 15, one end of which communicates with the fourth channel 13, and the other end penetrates the side wall surface of the second intermediate shaft 9.

[0059] In some embodiments, the first oil inlet hole is perpendicular to the axis of the first intermediate shaft 8, and the second oil inlet hole is perpendicular to the axis of the second intermediate shaft 9.

[0060] In some embodiments, the first oil inlet hole is at an angle to the axis of the first intermediate shaft 8, and the second oil inlet hole is at an angle to the axis of the second intermediate shaft 9.

[0061] The number of first oil outlet holes 14 is multiple; and / or, the number of second oil outlet holes 15 is multiple.

[0062] In some embodiments, the number of first oil outlet holes 14 and second oil outlet holes 15 can be flexibly set according to actual design requirements, which will not be described here.

[0063] The double-motor assembly comprises an end plate, and the end plate is provided with an end plate flow channel.

[0064] The first motor 2 comprises a first end plate 16 and a second end plate 17, and the first end plate 16 and the second end plate 17 are respectively provided with a first end plate flow channel 20 and a second end plate flow channel 21, one end of the first end plate flow channel 21 communicates with the first oil outlet hole 14, and the other end is connected with the first rotor 10; and / or, one end of the second end plate flow channel 21 communicates with the first oil outlet hole 14, and the other end communicates with the second rotor 11. In some embodiments, the first end plate 16 and the second end plate 17 are coaxially arranged with the first rotor 10, the first end plate 16 is installed together with one side end surface of the first rotor 10, and the second end plate 17 is installed together with the other side end surface of the first rotor 10.

[0065] One end of the first end plate flow channel 20 provided on the first end plate 16 communicates with the first oil outlet hole 14, and the other end communicates with the oil channel provided on the first rotor 10, and after the cooling medium passes through the first oil outlet hole 14, it flows into the oil channel provided on the first rotor 10 through the first end plate flow channel 20, thereby cooling the first rotor 10;

[0066] The second end plate flow channel 21 provided on the second end plate 17 is in communication with the first oil outlet hole 14 at one end and in communication with the oil channel provided on the first rotor 10 at the other end. After the cooling medium passes through the first oil outlet hole 14, the cooling medium flows into the oil channel provided on the first rotor 10 through the second end plate flow channel 21, thereby achieving cooling of the electronic rotor.

[0067] The first oil outlet hole 14 connected with the first end plate flow channel 20 and the second end plate flow channel 21 is a different oil outlet hole, that is, the number of the first oil outlet hole 14 is at least two.

[0068] As shown in FIG. 2, the first end plate flow channel 20 includes a first end plate liquid inlet flow channel 24 and a first end plate liquid outlet flow channel 25, and the second end plate flow channel 21 includes a second end plate liquid inlet flow channel 26 and a second end plate liquid outlet flow channel 27.

[0069] In some embodiments, after the cooling medium passes through the first oil outlet hole 14, the cooling medium flows into the oil channel provided on the first rotor 10 through the first end plate liquid inlet flow channel 24, and then flows out through the second end plate liquid outlet flow channel 27 provided on the second end plate 17, thereby achieving cooling of the first rotor 10.

[0070] After the cooling medium passes through the first oil outlet hole 14, the cooling medium flows into the oil channel provided on the first rotor 10 through the second end plate liquid inlet flow channel 26, and then flows out through the first end plate liquid outlet flow channel 25 provided on the first end plate 16, thereby achieving cooling of the first rotor 10.

[0071] The second motor 3 includes a third end plate 18 and a fourth end plate 19, and the third end plate 18 and the fourth end plate 19 are respectively provided with a third end plate flow channel 22 and a fourth end plate flow channel 23. The third end plate flow channel 22 is in communication with the second oil outlet hole 15 at one end and connected with the second rotor 11 at the other end. And / or, the fourth end plate flow channel 23 is in communication with the second oil outlet hole 15 at one end and in communication with the second rotor 11 at the other end. In some embodiments, the third end plate 18 and the fourth end plate 19 are coaxially arranged with the second rotor 11, the third end plate 18 is installed together with one side end surface of the second rotor 11, and the fourth end plate 19 is installed together with the other side end surface of the second rotor 11.

[0072] The third end plate flow channel 22 provided on the third end plate 18 is in communication with the second oil outlet hole 15 at one end and in communication with the oil channel provided on the second rotor 11 at the other end. After the cooling medium passes through the second oil outlet hole 15, the cooling medium flows into the oil channel provided on the second rotor 11 through the third end plate flow channel 22, thereby achieving cooling of the second rotor 11.

[0073] The fourth end plate flow channel 23 provided on the fourth end plate 19 is in communication with the second oil outlet hole 15 at one end and in communication with the oil channel provided on the second rotor 11 at the other end. After the cooling medium passes through the second oil outlet hole 15, the cooling medium flows into the oil channel provided on the second rotor 11 through the fourth end plate flow channel 23, thereby achieving cooling of the second rotor 11.

[0074] The second oil outlet holes 15 connected with the third end plate flow channels 22 and the fourth end plate flow channels 23 are different oil outlet holes, that is, the number of the second oil outlet holes 15 is at least two.

[0075] The third end plate flow channels 22 include third end plate liquid inlet flow channels 28 and third end plate liquid outlet flow channels 29, and the fourth end plate flow channels 23 include fourth end plate liquid inlet flow channels 30 and fourth end plate liquid outlet flow channels 31.

[0076] In some embodiments, after the cooling medium passes through the second oil outlet holes 15, the cooling medium flows into the oil channels arranged on the second rotor 11 through the third end plate liquid inlet flow channels 28, and then flows out through the fourth end plate liquid outlet flow channels 31 arranged on the fourth end plate 19, thereby achieving cooling of the second rotor 11.

[0077] After the cooling medium passes through the second oil outlet holes 15, the cooling medium flows into the oil channels arranged on the second rotor 11 through the fourth end plate liquid inlet flow channels 30, and then flows out through the third end plate liquid outlet flow channels 29 arranged on the third end plate 18, thereby achieving cooling of the second rotor 11.

[0078] The first rotor 10 is provided with fifth channels 32, one end of each of the fifth channels 32 being in communication with the first end plate liquid inlet flow channels 24 and the other end being in communication with the second end plate liquid outlet flow channels 27; and / or, one end of each of the fifth channels 32 being in communication with the second end plate liquid inlet flow channels 26 and the other end being in communication with the first end plate liquid outlet flow channels 25.

[0079] In some embodiments, the number of the fifth channels 32 is multiple.

[0080] In some embodiments, the number of the first end plate liquid inlet flow channels 24 and the first end plate liquid outlet flow channels 25, the number of the second end plate liquid inlet flow channels 26 and the second end plate liquid outlet flow channels 27, and the number of the fifth channels 32 are the same.

[0081] The second rotor 11 is provided with sixth channels 33, one end of each of the sixth channels 33 being in communication with the third end plate liquid inlet flow channels 28 and the other end being in communication with the fourth end plate liquid outlet flow channels 31; and / or, one end of each of the sixth channels 33 being in communication with the fourth end plate liquid inlet flow channels 30 and the other end being in communication with the third end plate liquid outlet flow channels 29.

[0082] In some embodiments, the number of the sixth channels 33 is multiple.

[0083] In some embodiments, the number of the third end plate liquid inlet flow channels 28 and the third end plate liquid outlet flow channels 29, the number of the fourth end plate liquid inlet flow channels 30 and the fourth end plate liquid outlet flow channels 31, and the number of the sixth channels 33 are the same.

[0084] The double-motor assembly 1 further includes a liquid inlet channel 34 in communication with the first channel 4. The liquid inlet channel 34 serves to transmit the cooling medium to the first channel 4.

[0085] In some embodiments, the intermediate region of the liquid inlet channel 34 is in communication with the first channel 4, more specifically, the liquid inlet channel 34 is arranged vertically with the first channel 4, and the intermediate point of the liquid inlet channel 34 is in communication with the first channel 4.

[0086] In some embodiments, the on-off device 7 is arranged at the position where the liquid inlet channel 34 is in communication with the first channel 4, for controlling whether the cooling medium in the liquid inlet channel 34 flows into the first channel 4.

[0087] In some embodiments, when the on-off device 7 is open, the cooling medium in the liquid inlet channel 34 flows into the first channel 4; when the on-off device 7 is closed, the cooling medium in the liquid inlet channel 34 does not flow into the first channel 4.

[0088] The first channel 4 comprises a main channel 41 and a branch channel 42, and the double-motor assembly 1 further comprises a liquid inlet channel 34, the main channel 41 is in communication with the liquid inlet channel 34, and the branch channel 42 is in communication with the third channel 12 and the fourth channel 13 respectively.

[0089] In some embodiments, the first channel 4 is composed of the main channel 41 and the branch channel 42, and the main channel 41 and the branch channel 42 are arranged vertically, the cooling medium flows into the branch channel 42 after flowing into the main channel 41 through the liquid inlet channel 34, and is divided into two paths after flowing through the branch channel 42, one path flows into the third channel 12, and the other path flows into the fourth channel 13.

[0090] The double-motor assembly 1 further comprises a housing 35, and the first channel 4 is arranged on the housing 35, which can be integrally formed with the housing 35 or machined later.

[0091] The liquid inlet channel 34 is arranged on the housing 35, which can be integrally formed with the housing 35 or machined later.

[0092] The double-motor assembly 1 further comprises a housing 35, and the housing 35 is provided with a liquid return channel, which is arranged below the housing 35, and the cooling medium flowing out through the fifth channel 32 and / or the sixth channel 33 is adapted to enter the oil return cavity through the liquid return channel after falling to the lower part of the housing 35.

[0093] In some embodiments, after the cooling medium flows out through the first oil outlet hole 14, it flows into the fifth channel 32 arranged on the first rotor 10 through the first end plate liquid inlet flow channel 24, and then flows out through the second end plate liquid outlet flow channel 27, and the flowed-out cooling medium is deposited at the bottom region of the housing 35 under the action of gravity, and then flows into the oil return cavity through the liquid return channel opened at the bottom region of the motor housing 35.

[0094] In some embodiments, the cooling medium flows out of the first oil outlet hole 14, flows into the fifth channel 32 on the first rotor 10 through the second end plate liquid inlet channel 26, and then flows out of the first end plate liquid outlet channel 25. The cooled medium flows to the bottom area of the shell 35 under the action of gravity and then flows into the oil return cavity through the liquid return channel in the bottom area of the motor shell 35. And / or,

[0095] In some embodiments, the cooling medium flows out of the second oil outlet hole 15, flows into the sixth channel 33 on the second rotor 11 through the third end plate liquid inlet channel 28, and then flows out of the fourth end plate liquid outlet channel 31. The cooled medium flows to the bottom area of the shell 35 under the action of gravity and then flows into the oil return cavity through the liquid return channel in the bottom area of the motor shell 35.

[0096] In some embodiments, the cooling medium flows out of the first oil outlet hole 14, flows into the sixth channel 33 on the second rotor 11 through the fourth end plate liquid inlet channel 30, and then flows out of the third end plate liquid outlet channel 29. The cooled medium flows to the bottom area of the shell 35 under the action of gravity and then flows into the oil return cavity through the liquid return channel in the bottom area of the motor shell 35.

[0097] The first intermediate shaft 8 is provided with a first gear 37 at the end away from the first channel 4, and the first gear 37 is integrally formed with the first intermediate shaft 8; and / or, the second intermediate shaft 9 is provided with a second gear 38 at the end away from the first channel 4, and the second gear 38 is integrally formed with the second intermediate shaft 9.

[0098] In some embodiments, the first intermediate shaft 8 is provided with a first gear 37 at one side end, and the first gear 37 is an integral part of the first intermediate shaft 8, which can reduce the number of parts. At the same time, the assembly gap between the first gear 37 and the first intermediate shaft 8 in the prior art is reduced, and the axial size is also reduced.

[0099] In the second aspect, as shown in FIG. 3, the application provides a power assembly 20, which comprises the above-mentioned dual-motor assembly 1.

[0100] In some embodiments, the oil return cavity, a pump and an oil cooler 39 are included, the pump and the oil cooler 39 are installed on the shell 35, the first end of the pump is connected with the oil return cavity, the second end of the pump is connected with the oil cooler 39, and the other end of the oil cooler 39 is connected with the liquid inlet channel 34.

[0101] In some embodiments, the pump can be a gear pump, a plunger pump, etc. The pump can be arranged on the shell 35, or can be installed at other positions of the power assembly 20. The specific installation position can be flexibly arranged according to the structure of the power assembly 20.

[0102] In some embodiments, the oil return cavity is used to accommodate the cooling medium flowing out of the return channel of the dual-motor assembly 1. The oil return cavity can be arranged on the housing 35 or can be a separate component mounted on the power assembly 20, and the specific mounting position can be flexibly arranged according to the structure of the power assembly 20.

[0103] In some embodiments, the cooling medium flowing out of the return channel of the motor 10 flows into the oil return cavity, and under the action of the pump, the cooling medium in the oil return cavity is pumped out, and the pumped-out cooling medium flows into the liquid inlet of the oil cooler 39 after flowing through the pump, and then flows into the liquid inlet of the liquid inlet channel 34 through the liquid outlet of the oil cooler 39, and then flows into the first channel 4, thereby forming a complete circulation path of the liquid medium.

[0104] In some embodiments, a filter is further included, which is mounted on the housing 35.

[0105] In some embodiments, the filter is arranged between the oil return cavity and the pump, and is used to filter the liquid medium flowing out of the oil return cavity.

[0106] In the third aspect, as shown in FIG. 4, the application provides a vehicle 30, which includes the above-mentioned power assembly 200.

[0107] The vehicle 30 of the embodiment of the application has the cooling medium flowing out of the first channel 4 and then flowing into the second channel 6 arranged on the intermediate shaft, so that the cooling flow path is simple in arrangement and the volume of the dual-motor assembly 1 is reduced.

[0108] It should be understood that the above-mentioned terms such as "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only used for the purpose of facilitating the description of the application and simplifying the description, and do not indicate or imply that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the application. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include one or more features. In the description of the application, unless otherwise stated, the meaning of "a plurality of" is two or more.

[0109] The above description is merely the preferred embodiments of the present application and the technical principles used. It should be understood by those skilled in the art that the scope of the utility model involved in the present application is not limited to the technical solutions formed by the specific combinations of the technical features described above, and should also cover other technical solutions formed by the combinations of the technical features described above or their equivalent features without departing from the concept of the utility model. For example, the technical solutions formed by the mutual replacement of the above features and the technical features disclosed in the present application (but not limited to) having similar functions.

Claims

1. A double motor assembly (1), comprising: a first channel (4) for flowing a cooling medium; and a first motor (2) and a second motor (3) comprising an intermediate shaft (5); wherein the intermediate shaft (5) is a motor shaft of the first motor (2) and the second motor (3), the intermediate shaft (5) is provided with a second channel (6) in communication with the first channel (4). The first channel (4) is arranged between the first motor (2) and the second motor (3).

2. The dual motor assembly (1) according to claim 1, wherein, The first motor (2) and the second motor (3) are coaxially arranged.

3. The dual electric machine assembly (1) of claim 1 or 2, wherein, The double motor assembly (1) further comprises an on-off device (7) arranged on the first channel (4) for controlling the flow of the cooling medium in the first channel (4).

4. The dual electric machine assembly (1) of any one of claims 1-3, wherein, The intermediate shaft (5) comprises a first intermediate shaft (8) and a second intermediate shaft (9), the first motor (2) comprises a first rotor (10), and the second motor (3) comprises a second rotor (11); 5. The dual electric machine assembly (1) of any one of claims 1 to 4, wherein, wherein the first rotor (10) is sleeved on the first intermediate shaft (8), and the second rotor (11) is sleeved on the second intermediate shaft (9). The first intermediate shaft (8) is provided with a third channel (12), and the second intermediate shaft (9) is provided with a fourth channel (13).

6. The dual electric motor assembly (1) of claim 5, wherein, A first oil outlet hole (14) is arranged on the first intermediate shaft (8), one end of the first oil outlet hole (14) is in communication with the third channel (12), and the other end penetrates through the side wall surface of the first intermediate shaft (8); and / or a second oil outlet hole (15) is arranged on the second intermediate shaft (9), one end of the second oil outlet hole (15) is in communication with the fourth channel (13), and the other end penetrates through the side wall surface of the second intermediate shaft (9).

7. Double electric machine assembly (1) according to claim 5 or 6, wherein The number of the first oil outlet hole (14) is multiple; and / or the number of the second oil outlet hole (15) is multiple.

8. The dual electric motor assembly (1) of claim 7, wherein, The double motor assembly (1) comprises an end plate, and an end plate flow channel is formed in the end plate.

9. The dual electric machine assembly (1) of any one of claims 1 to 8, wherein, The first motor (2) comprises a first end plate (16) and a second end plate (17), the first end plate (16) and the second end plate (17) are respectively provided with a first end plate flow channel (20) and a second end plate flow channel (21), one end of the first end plate flow channel (20) is in communication with the first oil outlet hole (14), and the other end is connected with the first rotor (10); and / or one end of the second end plate flow channel (21) is in communication with the first oil outlet hole (14), and the other end is in communication with the second rotor (11).

10. The dual electric motor assembly (1) of claim 9, wherein, The first end plate flow channel (20) comprises a first end plate liquid inlet flow channel (24) and a first end plate liquid outlet flow channel (25), and the second end plate flow channel (21) comprises a second end plate liquid inlet flow channel (26) and a second end plate liquid outlet flow channel (27).

11. The dual electric motor assembly (1) of claim 10, wherein, ​ 12. The dual electric motor assembly (1) according to any one of claims 9 to 11, wherein, The second motor (3) comprises a third end plate (18) and a fourth end plate (19), the third end plate (18) and the fourth end plate (19) are respectively provided with a third end plate flow channel (22) and a fourth end plate flow channel (23), one end of the third end plate flow channel (22) is communicated with the second oil outlet hole (15), and the other end is connected with the second rotor (11); and / or, one end of the fourth end plate flow channel (23) is communicated with the second oil outlet hole (15), and the other end is communicated with the second rotor (11).

13. The dual electric motor assembly (1) of claim 12, wherein, The third end plate flow channel (22) comprises a third end plate liquid inlet flow channel (28) and a third end plate liquid outlet flow channel (29), and the fourth end plate flow channel (23) comprises a fourth end plate liquid inlet flow channel (30) and a fourth end plate liquid outlet flow channel (31).

14. The dual electric motor assembly (1) according to any one of claims 5 to 13, wherein, The first rotor (10) is provided with a fifth channel (32), one end of the fifth channel (32) is communicated with the first end plate liquid inlet flow channel (24), and the other end is communicated with the second end plate liquid outlet flow channel (27); and / or, one end of the fifth channel (32) is communicated with the second end plate liquid inlet flow channel (26), and the other end is communicated with the first end plate liquid outlet flow channel (25); Wherein, the second rotor (11) is provided with a sixth channel (33), one end of the sixth channel (33) is communicated with the third end plate liquid inlet flow channel (28), and the other end is communicated with the fourth end plate liquid outlet flow channel (31); and / or, one end of the sixth channel (33) is communicated with the fourth end plate liquid inlet flow channel (30), and the other end is communicated with the third end plate liquid outlet flow channel (29).

15. Double electric machine assembly (1) according to any of claims 4 to 14, wherein, The double motor assembly (1) further comprises a liquid inlet channel (34), which is communicated with the first channel (4).

16. The dual electric motor assembly (1) of claim 15, wherein, The middle region of the liquid inlet channel (34) is communicated with the first channel (4).

17. The dual electric motor assembly (1) according to claim 15 or 16, wherein, The on-off device (7) is arranged at the position where the liquid inlet channel (34) is communicated with the first channel (4).

18. The dual electric motor assembly (1) according to any one of claims 6 to 17, wherein, The first channel (4) comprises a main channel (41) and a branch channel (42), the double motor assembly (1) further comprises a liquid inlet channel (34), the main channel (41) is communicated with the liquid inlet channel (34), and the branch channel (42) is respectively communicated with the third channel (12) and the fourth channel (13).

19. Double electric machine assembly (1) according to any one of claims 1 to 18, wherein, The double motor assembly (1) further comprises a shell (35), and the first channel (4) is arranged on the shell (35).

20. The dual electric motor assembly (1) of claim 19, wherein, The double motor assembly (1) further comprises a liquid inlet channel (34), and the liquid inlet channel (34) is arranged on the shell (35).

21. Double electric machine assembly (1) according to claim 19 or 20, wherein, The double motor assembly (1) further comprises a shell (35), and the shell (35) is provided with a liquid return channel, the liquid return channel is arranged below the shell (35), and the cooling medium flowing out through the fifth channel (32) and / or the sixth channel (33) is adapted to enter an oil return cavity through the liquid return channel after dropping below the shell (35).

22. Double electric machine assembly (1) according to any one of claims 7 to 21, wherein, The first intermediate shaft (8) is provided with a first gear (37) away from the end of the first passage (4), and the first gear (37) is integrally formed with the first intermediate shaft (8); and / or, the second intermediate shaft (9) is provided with a second gear (38) away from the end of the first passage (4), and the second gear (38) is integrally formed with the second intermediate shaft (9).

23. A power assembly (200) comprising the dual-motor assembly (1) of any one of claims 1 to 22.

24. The powertrain (200) of claim 23, wherein, The power assembly (200) comprises an oil return cavity, a pump and an oil cooler (39), the pump and the oil cooler (39) are mounted on the housing (35), the first end of the pump is connected with the oil return cavity, the second end of the pump is connected with the oil cooler (39), and the other end of the oil cooler (39) is connected with the liquid inlet passage (34).

25. A vehicle (300) comprising the dual-motor assembly (1) of any one of claims 1 to 22 or the power assembly (200) of claim 23 or 24.

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