Oil cooling electric drive assembly

Abstract

The utility model discloses an oil-cooling electric drive assembly which comprises a speed reducer assembly, a first cooling oil channel, a second cooling oil channel, a second cooling oil channel, a first motor, a second motor and a second motor, and the speed reducer assembly is internally provided with the first cooling oil channel used for cooling the speed reducer assembly; the motor assembly is arranged on one side of the speed reducer assembly, a second cooling oil duct is arranged in the motor assembly, and the second cooling oil duct is used for cooling the motor assembly; and the controller assembly is connected to the upper part of the motor assembly. Compared with the prior art, the motor assembly and the speed reducer assembly are arranged in parallel, and the controller assembly is arranged above the motor assembly, so that the oil-cooled electric drive assembly is simpler and more compact in structure and smaller in peripheral size, and the problem that the Z direction of a rear-drive vehicle is limited and the battery space is limited is effectively solved; meanwhile, front-drive and rear-drive vehicle types of the whole vehicle can be compatible, and the arrangement requirements of a large battery and a large oil tank of the whole vehicle are met.

Description

TECHNICAL FIELD

[0001] The utility model relates to electric drive technical field especially a kind of oil-cooled electric drive assembly. BACKGROUND

[0002] With the high-speed development of new energy vehicles, electric drive system is developed towards high integration, high efficiency, high power, high speed and low noise; The maximum speed of motor can reach 20000rpm+, the high speed of motor brings the promotion of heat, and the motor needs to be cooled more fully, to ensure that the motor continues to operate at high power, improve the comprehensive efficiency of electric drive system, and improve the endurance of the vehicle is the main research direction of market.

[0003] The common electric drive system assembly in market is three-in-one integrated structure, and front drive vehicle is mostly used, low-power motor cooling is mainly water-cooled, and high-power oil-cooled motor is less used; In vehicle layout, the motor of oil-cooled electric drive system is generally placed in front of drive half shaft (in the forward direction of vehicle), and if used as rear drive vehicle, the space of battery pack is squeezed, so that the overall battery pack is small and the endurance is low. In the cooling and lubrication design of electric drive system assembly, most products on the market use spray disc to guide oil cooling motor stator winding, and less cooling stator core and reducer gear bearing part. SUMMARY

[0004] The utility model aims at providing a kind of oil-cooled electric drive assembly to solve the problems in prior art, which can meet the needs of front drive and rear drive vehicle.

[0005] The utility model provides a kind of oil-cooled electric drive assembly, comprising:

[0006] Reducer assembly, the first cooling oil channel is used to cool the reducer assembly in the reducer assembly;

[0007] Motor assembly, the output end of the motor assembly is connected with the input end of the reducer assembly, the second cooling oil channel is used to cool the motor assembly, and the motor assembly is arranged on one side of the reducer assembly;

[0008] Controller assembly, the controller assembly is connected above the motor assembly.

[0009] The oil-cooled electric drive assembly described above, preferably, the reducer assembly includes a first housing, a second housing, an input shaft assembly, an intermediate shaft assembly and a differential assembly, the input shaft assembly, the intermediate shaft assembly and the differential assembly are integrated in the space formed by the connection of the first housing and the second housing, and the input shaft assembly, the intermediate shaft assembly and the differential assembly are sequentially connected in transmission.

[0010] The oil-cooled electric drive assembly as claimed in any one of the preceding claims, wherein preferably, the motor assembly comprises a third housing, a fourth housing, a motor stator, a motor rotor and a rotary transformer assembly, the motor stator, the motor rotor and the rotary transformer assembly are accommodated in the third housing, one end of the third housing is connected with the second housing, the other end of the third housing is connected with the fourth housing.

[0011] The oil-cooled electric drive assembly as claimed in any one of the preceding claims, wherein preferably, an output end of the motor rotor is drivingly connected with the input shaft assembly.

[0012] The oil-cooled electric drive assembly as claimed in any one of the preceding claims, wherein preferably, the controller assembly is arranged above the third housing.

[0013] The oil-cooled electric drive assembly as claimed in any one of the preceding claims, wherein preferably, the second housing, the third housing and the fourth housing are fastened and connected by long bolts.

[0014] The oil-cooled electric drive assembly as claimed in any one of the preceding claims, wherein preferably, the first cooling oil passage is provided with a first oil hole, a second oil hole and a third oil hole, the first oil hole is connected with the input shaft assembly, the second oil hole is connected with the intermediate shaft assembly, and the third oil hole is connected with the differential assembly.

[0015] The oil-cooled electric drive assembly as claimed in any one of the preceding claims, wherein preferably, the second cooling oil passage comprises a stator cooling oil passage and a rotor cooling oil passage, the stator cooling oil passage is arranged on the third housing, the rotor cooling oil passage is arranged on the fourth housing, and the stator cooling oil passage and the rotor cooling oil passage are in communication.

[0016] The oil-cooled electric drive assembly as claimed in any one of the preceding claims, wherein preferably, the oil-cooled electric drive assembly further comprises an oil suction filter and an electronic oil pump, an inlet end of the electronic oil pump is in communication with the oil suction filter, and outlet ends of the electronic oil pump are in communication with the first cooling oil passage and the second cooling oil passage respectively.

[0017] The oil-cooled electric drive assembly as claimed in any one of the preceding claims, wherein preferably, the oil-cooled electric drive assembly further comprises an oil temperature controller, and the oil temperature controller is arranged at the outlet end of the electronic oil pump.

[0018] Compared with the prior art, the motor assembly and the speed reducer assembly are arranged side by side, and the controller assembly is arranged above the motor assembly, so that the structure of the oil-cooled electric drive assembly is more simple and compact, the peripheral size is smaller, the problem of limited Z direction and battery space of the rear-drive vehicle is effectively solved, and the front-drive and rear-drive vehicle models of the whole vehicle can be compatible, and the arrangement requirement of the large battery and large oil tank of the whole vehicle is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a perspective view of the oil-cooled electric drive assembly from another viewing angle according to an embodiment of the present application;

[0020] Figure 2 is a perspective view of the oil-cooled electric drive assembly from another viewing angle according to an embodiment of the present application;

[0021] Figure 3 is an exploded view of the oil-cooled electric drive assembly according to an embodiment of the present application;

[0022] Figure 4 is a schematic diagram of power transmission according to an embodiment of the present application;

[0023] Figure 5 is a perspective sectional view of the speed reducer assembly according to an embodiment of the present application;

[0024] Figure 6 is a perspective sectional view of the motor assembly according to an embodiment of the present application;

[0025] Figure 7 is a schematic diagram of the oil-cooled electric drive assembly arranged in a vehicle according to an embodiment of the present application.

[0026] BRIEF DESCRIPTION OF DRAWINGS

[0027] 100 - oil-cooled electric drive assembly, 200 - vehicle, 210 - drive half shaft, 220 - oil tank, 230 - power battery;

[0028] 10 - speed reducer assembly, 11 - first cooling oil passage, 111 - first oil hole, 112 - second oil hole, 113 - third oil hole, 12 - first housing, 13 - second housing, 14 - input shaft assembly, 15 - intermediate shaft assembly, 16 - differential assembly;

[0029] 20 - motor assembly, 21 - second cooling oil passage, 211 - stator cooling oil passage, 212 - rotor cooling oil passage, 22 - third housing, 23 - fourth housing, 24 - motor stator, 25 - motor rotor, 26 - rotary transformer assembly;

[0030] 30 - controller assembly;

[0031] 40 - oil suction filter;

[0032] 50 - electronic oil pump;

[0033] 60 - oil temperature controller;

[0034] 70 - long bolt. DETAILED DESCRIPTION

[0035] The embodiments described below with reference to the drawings are exemplary and are only used to explain the utility model and cannot be explained as a limitation of the utility model.

[0036] Referring to Figures 1 to 6 As shown in the figure, the utility model provides an oil-cooled electric drive assembly 100, comprising a reducer assembly 10, a motor assembly 20 and a controller assembly 30, wherein:

[0037] The reducer assembly 10 is provided with a first cooling oil channel 11, the first cooling oil channel 11 is used for cooling the reducer assembly 10, and the cooling oil flows through the first cooling oil channel 11 to cool and lower the temperature of each component in the reducer assembly 10.

[0038] The motor assembly 20 is arranged on one side of the reducer assembly 10, the output end of the motor assembly 20 is connected with the input end of the reducer assembly 10, the motor assembly 20 is provided with a second cooling oil channel 21, the second cooling oil channel 21 is used for cooling the motor assembly 20, and the cooling oil flows through the second cooling oil channel 21 to cool and lower the temperature of each component in the motor assembly 20.

[0039] The controller assembly 30 is connected above the motor assembly 20, the controller assembly 30 can deliver current to the motor assembly 20 to make the motor assembly 20 work to transmit power to the reducer assembly 10.

[0040] In the embodiments provided in the application, the motor assembly 20 is arranged on the right side of the reducer assembly 10, the controller assembly 30 is arranged above the motor assembly 20, the output end of the motor assembly 20 is connected with the input end of the reducer assembly 10, the controller assembly 30 provides alternating current to the motor assembly 20 to make the motor assembly 20 generate torque, then the generated torque is transmitted to the reducer assembly 10, and finally power is output. Compared with the prior art, the structure of the oil-cooled electric drive assembly 100 of the application is more simple and compact, the size of the assembly periphery is reduced, the problem of limited Z direction and battery space of the rear-drive vehicle 200 can be solved, the application is suitable for front-drive and rear-drive vehicle models, and the arrangement requirements of large battery and large oil tank of the whole vehicle can be met.

[0041] Referring to Figure 3 As shown in the figure, the reducer assembly comprises a first housing 12, a second housing 13, an input shaft assembly 14, an intermediate shaft assembly 15 and a differential assembly 16, the input shaft assembly 14, the intermediate shaft assembly 15 and the differential assembly 16 are integrated in the space formed by the connection of the first housing 12 and the second housing 13, and the input shaft assembly 14, the intermediate shaft assembly 15 and the differential assembly 16 are sequentially connected in transmission.

[0042] The first housing 12 is a differential front housing, the second housing 13 is a differential rear housing, the first housing 12 and the second housing 13 are arranged opposite to each other, the input shaft assembly 14 is connected with the motor assembly 20, the input shaft assembly 14 transmits the torque generated by the motor assembly 20 to the differential assembly 16 through the intermediate shaft assembly 15, and the differential assembly 16 outputs power to the outside.

[0043] Further, the motor assembly 20 comprises a third housing 22, a fourth housing 23, a motor stator 24, a motor rotor 25 and a resolver assembly 26, the motor stator 24, the motor rotor 25 and the resolver assembly 26 are accommodated in the third housing 22, one end of the third housing 22 is connected with the second housing 13, and the other end of the third housing 22 is connected with the fourth housing 23.

[0044] The third housing 22 is a motor housing, the fourth housing 23 is a motor rear housing, the third housing 22 is connected to the right side of the second housing 13, the fourth housing 23 is connected to the right end of the third housing 22, the motor stator 24, the motor rotor 25 and the resolver assembly 26 are assembled in the third housing 22, and the output end of the motor rotor 25 is in driving connection with the input shaft assembly 14 to realize power transmission.

[0045] The controller assembly 30 is arranged above the third housing 22, the controller assembly 30 is connected with a battery to provide alternating current to the motor stator 24.

[0046] Based on the above embodiment, the working principle of the oil-cooled electric drive assembly 100 is that the controller assembly 30 provides alternating current to the motor stator 24 to make the motor stator 24 generate a rotating magnetic field, and then the motor rotor 25 rotates to generate torque, and the torque is transmitted to the input shaft assembly 14 of the speed reducer assembly 10, transmitted to the differential assembly 16 through the intermediate shaft assembly 15, and then transmitted to the wheels by the differential assembly 16.

[0047] Referring to Figure 4 As shown, the motor stator 24, the motor rotor 25 and the input shaft assembly 14 form a first shaft system of the oil-cooled electric drive assembly 100, the intermediate shaft assembly 15 forms a second shaft system of the oil-cooled electric drive assembly 100, the differential assembly 16 forms a third shaft system of the oil-cooled electric drive assembly 100, and the first shaft system, the second shaft system and the third shaft system are connected in sequence, so that the oil-cooled electric drive assembly 100 can effectively transmit power while having a compact structure, and can meet the arrangement requirements of the vehicle 200.

[0048] Since the motor stator 24, the motor rotor 25 and the input shaft assembly 14 constitute the first shafting of the oil-cooled electric drive assembly 100, in order to ensure the coaxiality of the input shaft assembly 14 and the motor assembly 20, in the embodiments provided by the present application, the second housing 13, the third housing 22 and the fourth housing 23 are fastened and connected by long bolts 70. The fourth housing 23, the third housing 22 and the second housing 13 are tightened in sequence by the long bolts 70, so that the motor stator 24, the motor rotor 25 and the input shaft assembly 14 can be kept on the first shafting.

[0049] Since the first cooling oil passage 11 is used for cooling the speed reducer assembly 10, the input shaft assembly 14, the intermediate shaft assembly 15 and the differential assembly 16 need to be cooled respectively, referring to Figure 5 , the first cooling oil passage 11 includes a first oil hole 111, a second oil hole 112 and a third oil hole 113, the first oil hole 111 is an input shaft bearing lubrication hole, the second oil hole 112 is an intermediate shaft bearing lubrication hole, and the third oil hole 113 is a differential bearing lubrication hole. The cooling oil entering the first cooling oil passage 11 is cooled and cooled for the input shaft assembly 14 through the first oil hole 111, cooled and cooled for the intermediate shaft assembly 15 through the second oil hole 112, and cooled and cooled for the differential assembly 16 through the third oil hole 113.

[0050] Since the motor stator 24 is arranged on the outer periphery of the motor rotor 25, in order to cool the motor stator 24 and the motor rotor 25, referring to Figure 6 , the second cooling oil passage 21 includes a stator cooling oil passage 211 and a rotor cooling oil passage 212, the stator cooling oil passage 211 is arranged on the third housing 22, the rotor cooling oil passage 212 is arranged on the fourth housing 23, and the stator cooling oil passage 211 and the rotor cooling oil passage 212 are in communication.

[0051] The cooling oil of the electronic oil pump 50 first cools the motor stator 24 through the stator cooling oil passage 211, then flows into the rotor cooling oil passage 212 of the fourth housing 23, and then flows back to the oil pan after cooling the motor rotor 25.

[0052] Referring to Figure 2 , Figure 5 and Figure 6 , the oil-cooled electric drive assembly further includes an oil suction filter 40 and an electronic oil pump 50, the inlet end of the electronic oil pump 50 is in communication with the suction filter, and the outlet end of the electronic oil pump 50 is in communication with the first cooling oil passage 11 and the second cooling oil passage 21 respectively. The electronic oil pump 50 is used to pump the cooling oil to the first cooling oil passage 11 and the second cooling oil passage 21. Before the cooling oil enters each oil passage, it needs to be filtered by the oil suction filter 40 to remove larger particles or impurities in the oil, so as to improve the cooling efficiency of the cooling oil.

[0053] In the embodiments provided in the present application, the filtered cooling oil liquid is pumped to the first cooling oil passage 11 or the second cooling oil passage 21 to cool the reducer assembly 10 or the motor assembly 20 according to the cooling requirement under the action of the electronic oil pump 50.

[0054] Further, the oil-cooled electric drive assembly further comprises an oil temperature controller 60 arranged at the outlet end of the electronic oil pump 50. The oil temperature controller 60 can monitor the temperature of the cooling oil liquid and convert the temperature signal into an electric signal to transmit to the temperature controller, thereby controlling and adjusting the temperature of the cooling oil liquid to make the cooling oil liquid reach the required cooling temperature, thereby improving the cooling efficiency.

[0055] Referring to Figure 7 As shown in the drawings, when the oil-cooled electric drive assembly 100 is arranged in the vehicle 200, the vehicle 200 has a drive half shaft 210, and the arrow direction in the drawings is the forward direction of the vehicle 200. In the forward direction of the vehicle 200, the oil-cooled electric drive assembly 100 is arranged behind the drive half shaft 210, and a large-capacity oil tank 220 and a large-volume power battery 230 can be arranged in front of the drive half shaft 210, thereby providing sufficient space for the vehicle to achieve super-long endurance.

[0056] The above embodiments according to the drawings illustrate the structure, features and effect of the present application, and the above description is only the preferred embodiment of the present application, but the present application is not limited by the drawings, any changes or modifications made according to the concept of the present application, or equivalent embodiments with equivalent changes, as long as they are within the scope of the present application.

Claims

1. An oil-cooled electric drive assembly, characterized in that, include: A speed reducer assembly having a first cooling oil passage for cooling the speed reducer assembly; A motor assembly is disposed on one side of the reducer assembly, the output end of the motor assembly is connected to the input end of the reducer assembly, and the motor assembly has a second cooling oil passage for cooling the motor assembly. A controller assembly is connected above the motor assembly.

2. The oil-cooled electric drive assembly according to claim 1, characterized in that, The reducer assembly includes a first housing, a second housing, an input shaft assembly, an intermediate shaft assembly, and a differential assembly. The input shaft assembly, the intermediate shaft assembly, and the differential assembly are integrated within the space formed by the connection between the first housing and the second housing, and the input shaft assembly, the intermediate shaft assembly, and the differential assembly are sequentially connected in a transmission manner.

3. The oil-cooled electric drive assembly according to claim 2, characterized in that, The motor assembly includes a third housing, a fourth housing, a motor stator, a motor rotor, and a resolver assembly. The motor stator, the motor rotor, and the resolver assembly are housed within the third housing. One end of the third housing is connected to the second housing, and the other end of the third housing is connected to the fourth housing.

4. The oil-cooled electric drive assembly according to claim 3, characterized in that, The output end of the motor rotor is connected to the input shaft assembly for transmission.

5. The oil-cooled electric drive assembly according to claim 3, characterized in that, The controller assembly is located above the third housing.

6. The oil-cooled electric drive assembly according to claim 3, characterized in that, The second housing, the third housing, and the fourth housing are fastened together by long bolts.

7. The oil-cooled electric drive assembly according to claim 2, characterized in that, The first cooling oil passage is provided with a first oil hole, a second oil hole and a third oil hole. The first oil hole is connected to the input shaft assembly, the second oil hole is connected to the intermediate shaft assembly, and the third oil hole is connected to the differential assembly.

8. The oil-cooled electric drive assembly according to claim 3, characterized in that, The second cooling oil passage includes a stator cooling oil passage and a rotor cooling oil passage. The stator cooling oil passage is located on the third housing, and the rotor cooling oil passage is located on the fourth housing. The stator cooling oil passage is connected to the rotor cooling oil passage.

9. The oil-cooled electric drive assembly according to claim 1, characterized in that, The oil-cooled electric drive assembly also includes an oil suction filter and an electronic oil pump. The inlet end of the electronic oil pump is connected to the oil suction filter, and the outlet end of the electronic oil pump is connected to the first cooling oil passage and the second cooling oil passage, respectively.

10. The oil-cooled electric drive assembly according to claim 9, characterized in that, The oil-cooled electric drive assembly also includes an oil temperature controller, which is located at the outlet end of the electronic oil pump.

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