CN113733814A - New energy automobile and electric drive axle system thereof - Google Patents

New energy automobile and electric drive axle system thereof Download PDF

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Publication number
CN113733814A
CN113733814A CN202010479559.2A CN202010479559A CN113733814A CN 113733814 A CN113733814 A CN 113733814A CN 202010479559 A CN202010479559 A CN 202010479559A CN 113733814 A CN113733814 A CN 113733814A
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CN
China
Prior art keywords
hybrid
motor
drive axle
rotor
gear
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Pending
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CN202010479559.2A
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Chinese (zh)
Inventor
刘大伟
黄锦元
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Prestolite Electric Weifang Ltd
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Prestolite Electric Weifang Ltd
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Application filed by Prestolite Electric Weifang Ltd filed Critical Prestolite Electric Weifang Ltd
Priority to CN202010479559.2A priority Critical patent/CN113733814A/en
Publication of CN113733814A publication Critical patent/CN113733814A/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B35/00—Axle units; Parts thereof ; Arrangements for lubrication of axles
    • B60B35/12—Torque-transmitting axles
    • B60B35/121—Power-transmission from drive shaft to hub
    • B60B35/122—Power-transmission from drive shaft to hub using gearings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K11/00—Arrangement in connection with cooling of propulsion units
    • B60K11/02—Arrangement in connection with cooling of propulsion units with liquid cooling
    • B60K11/04—Arrangement or mounting of radiators, radiator shutters, or radiator blinds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K17/00—Arrangement or mounting of transmissions in vehicles
    • B60K17/04—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing
    • B60K17/12—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of electric gearing

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

A new energy automobile and an electric drive axle system thereof, the new energy automobile comprises a left driving wheel, a right driving wheel, a control device and the electric drive axle system, and the electric drive axle system comprises: a transaxle bracket; the left and right transmission mechanisms are symmetrically arranged on the drive axle bracket and are correspondingly connected with the left and right drive wheels; the hybrid motor is arranged on the drive axle bracket and is respectively connected with the left transmission mechanism and the right transmission mechanism; the left driving motor and the right driving motor are respectively arranged on the drive axle bracket and are respectively connected with the corresponding left transmission mechanism and the right transmission mechanism, and the hybrid motor is respectively connected with the corresponding left driving motor and the corresponding right driving motor through the left transmission mechanism and the right transmission mechanism; and the left oil-cooled radiator and the right oil-cooled radiator are respectively connected with the left driving motor and the hybrid motor, the right oil-cooled radiator is respectively connected with the right driving motor and the hybrid motor, and the left driving motor and the right driving motor are connected through a cooling pipeline.

Description

New energy automobile and electric drive axle system thereof
Technical Field
The invention relates to an electric automobile driving device, in particular to a new energy automobile and an electric drive axle system thereof.
Background
Referring to fig. 1 and 2, fig. 1 is a schematic diagram of a prior art single electromechanical bridge structure, and fig. 2 is a schematic diagram of a prior art dual electromechanical bridge structure. At present, a main current electric drive bridge system used by a pure electric vehicle is classified according to the number of motors, and then two electric drive bridges of a single motor and double motors are provided. For a single motor (see fig. 1), the motor is mainly integrated on an axle according to a traditional axle, namely, the motor is driven in a centralized way, and a traditional mechanical differential is adopted; the double-motor electric drive axle can realize distributed drive (see fig. 2), two motors are respectively arranged on the left and the right of the axle, the two motors are respectively responsible for driving two wheels, and an electronic differential is adopted. The electrical differential is clearly much more efficient in terms of transmission efficiency than the mechanical differential. The two electric drive bridges, whether single or double, have the following disadvantages:
1. the two driving modes of single-motor or double-motor distributed driving can only provide two states of driving and braking, the motor only has the functions of driving and braking (energy feedback), the power of the whole vehicle cannot be further improved, the energy in the running process of the vehicle is not fully utilized, and the endurance mileage is short;
2. the cooling mode that the motor adopted all uses water cooling as the main, and cooling efficiency is low, and whole cooling system is bulky.
Disclosure of Invention
The invention aims to solve the technical problem of the prior art, and provides a new energy automobile and an electric drive axle system thereof, which can improve the power and the cruising ability of the automobile.
In order to achieve the above object, the present invention provides an electric drive axle system of a new energy automobile, including:
a transaxle bracket;
the left and right transmission mechanisms are symmetrically arranged on the drive axle bracket and are correspondingly connected with left and right driving wheels of the new energy automobile;
the hybrid motor is arranged on the drive axle bracket and is respectively connected with the left transmission mechanism and the right transmission mechanism;
the left driving motor and the right driving motor are respectively arranged on the drive axle bracket and are respectively connected with the corresponding left transmission mechanism and the right transmission mechanism, and the hybrid motor is respectively connected with the corresponding left driving motor and the corresponding right driving motor through the left transmission mechanism and the right transmission mechanism; and
the left oil-cooled radiator is connected with the left driving motor and the hybrid motor respectively, the right oil-cooled radiator is connected with the right driving motor and the hybrid motor respectively, and the left driving motor and the right driving motor are connected through a cooling pipeline.
The electric drive axle system of the new energy automobile further comprises an oil pump integrated with the left oil-cooled radiator and the right oil-cooled radiator respectively, wherein cooling oil in the oil pump flows to the hybrid motor through the left oil-cooled radiator, then sequentially flows through the right oil-cooled radiator, the right drive motor and the right transmission mechanism, flows back to the right drive motor, sequentially flows into the left drive motor and the left transmission mechanism through the cooling pipeline, and finally flows back to the left oil-cooled radiator through the left drive motor.
The electric drive axle system of the new energy automobile is characterized in that the hybrid motor comprises a hybrid motor shell, an outer stator, a first hybrid rotor and a second hybrid rotor, the outer stator is arranged in the hybrid motor shell and close to the inner wall of the shell, the first hybrid rotor is located in the outer stator, the second hybrid rotor is located in the first hybrid rotor and connected with the first hybrid rotor, and an output shaft of the second hybrid rotor and an output shaft of the first hybrid rotor are located on the same axis.
The electric drive axle system of the new energy automobile is characterized in that the first mixing rotor comprises a first rotor iron core, the first rotor iron core is of a cylinder structure with one open end, permanent magnet layers are laid on the inner wall and the outer wall of the cylinder of the first rotor iron core, one end of an output shaft of the first mixing rotor is mounted on the shell of the mixing motor through a support bearing, and the other end of the output shaft of the first mixing rotor is connected with the second mixing rotor.
The electric drive axle system of the new energy automobile is characterized in that the second hybrid rotor comprises a second rotor core and a rotor winding wound on the second rotor core, an output shaft of the second hybrid rotor and the second rotor core are integrated into a whole, and the other end of the output shaft of the first hybrid rotor is mounted on the second rotor core through a bearing.
The electric drive axle system of the new energy automobile comprises a left drive mechanism and a right drive mechanism, wherein the left drive mechanism and the right drive mechanism respectively comprise a drive shell and a first gear, a second gear, a third gear, a fourth gear and a fifth gear which are arranged in the drive shell, the first gear is connected with an output shaft of the corresponding left or right drive motor, the second gear is respectively meshed with the first gear and the third gear, the third gear is respectively meshed with the fourth gear and the fifth gear, the fourth gear is connected with the hybrid motor, and the fifth gear is connected with the corresponding left or right drive wheel.
In the electric drive axle system of the new energy automobile, the fourth gear of the left transmission mechanism is connected with the output shaft of the second hybrid rotor of the hybrid motor through a left transmission half shaft, and the fourth gear of the right transmission mechanism is connected with the output shaft of the first hybrid rotor of the hybrid motor through a right transmission half shaft.
In the electric drive axle system of the new energy automobile, the left and right drive wheels realize turning by adopting electronic differential, the left and right drive motors realize different rotational speed differences according to turning requirements, and the hybrid motor realizes corresponding rotational speed differences along with the left and right drive motors.
In the electric drive axle system of the new energy automobile, the left and right drive motors and the hybrid motor include three drive modes, and in the normal mode, the left and right drive motors drive and transmit part of power to the hybrid motor through the left and right transmission mechanisms, and the hybrid motor generates power and charges a vehicle-mounted power battery; in the extreme mode, the left driving motor, the right driving motor and the hybrid motor are driven; and in the high-speed cruising mode, the hybrid motor is driven, and the left and right driving motors generate electricity and charge the vehicle-mounted power battery to improve the driving mileage of the vehicle.
In order to better achieve the above object, the present invention further provides a new energy automobile, including left and right driving wheels, a control device, and an electric drive axle system, where the left and right driving wheels are connected to the electric drive axle system, and the electric drive axle system is connected to the control device, where the electric drive axle system is the above electric drive axle system, and the left and right driving wheels are respectively connected to output shafts of the left and right transmission mechanisms of the electric drive axle system.
The invention has the technical effects that:
according to the electric drive axle system, the working states (driving or power generation states) of the three motors are controlled, so that the dynamic requirement of the whole vehicle is enhanced, and the endurance mileage is increased; compared with a water cooling system, the integrated serial oil cooling mode is adopted, and a water jacket and other auxiliary parts such as a cooling water tank system and the like do not need to be designed outside the shell, so that the system integration level is improved.
The invention is described in detail below with reference to the drawings and specific examples, but the invention is not limited thereto.
Drawings
FIG. 1 is a schematic view of a prior art single electro-mechanical bridge configuration;
FIG. 2 is a schematic view of a prior art dual electro-mechanical bridge configuration;
fig. 3 is a schematic structural diagram of a new energy vehicle and an electric drive axle system thereof according to an embodiment of the invention;
fig. 4 is a schematic structural diagram of a hybrid motor according to an embodiment of the present invention;
fig. 5 is a schematic view of the turning principle of the vehicle of the present invention.
Wherein the reference numerals
1 drive axle support
2 left driving wheel
3 right driving wheel
4 left transmission mechanism
41 drive housing
42 first gear
43 second gear
44 third gear
45 fourth gear
46 fifth gear
5 Right transmission mechanism
6 left driving motor
7 right driving motor
8 hybrid motor
81 hybrid motor case
82 outer stator
83 first mixing rotor
831 output shaft
832 first rotor core
833 layer of permanent magnet
834 support bearing
835 bearing
836 bearing
84 second mixing rotor
841 output shaft
842 second rotor core
843 rotor winding
844 bearing
9 left transmission half shaft
10 right transmission half shaft
11 left oil-cooled radiator
12 right oil cooling radiator
13 cooling circuit
Detailed Description
The invention will be described in detail with reference to the following drawings, which are provided for illustration purposes and the like:
referring to fig. 3, fig. 3 is a schematic structural diagram of a new energy vehicle and an electric drive axle system thereof according to an embodiment of the present invention. The new energy automobile comprises left and right driving wheels 2 and 3, a control device and an electric drive axle system, wherein the left and right driving wheels 2 and 3 are connected with the electric drive axle system, the electric drive axle system is connected with the control device (not shown), the left and right driving wheels 2 and 3 comprise hub mounting bolts, brakes, hubs and tires, the left and right driving wheels 2 and 3 are respectively connected with output shafts of corresponding left and right transmission mechanisms 4 and 5 of the electric drive axle system, and the composition, structure, mutual position relation, connection relation, functions and the like of other parts of the new energy automobile are mature prior art, so that the details are not described herein, and only the electric drive axle system of the invention is described in detail below.
The electric drive axle system of the embodiment comprises: a transaxle bracket 1; the left and right transmission mechanisms 4 and 5 are symmetrically arranged on the drive axle bracket 1 and are correspondingly connected with the left and right driving wheels 2 and 3 of the new energy automobile; the hybrid motor 8 is arranged on the drive axle bracket 1 and is respectively connected with the left transmission mechanism 4 and the right transmission mechanism 5, and the symmetric center of the hybrid motor 8 is superposed with the symmetric center of the drive axle bracket 1, namely, the electric drive axle system is in a bilateral symmetric structure; the left and right driving motors 6 and 7 are respectively installed on the drive axle bracket 1 and are respectively connected with the corresponding left and right transmission mechanisms 4 and 5, and the hybrid motor 8 is respectively connected with the corresponding left and right driving motors 6 and 7 through the left and right transmission mechanisms 4 and 5; and the left and right oil-cooled radiators 11 and 12, wherein the left oil-cooled radiator 11 is respectively connected with the left driving motor 6 and the hybrid motor 8, the right oil-cooled radiator 12 is respectively connected with the right driving motor 7 and the hybrid motor 8, and the left and right driving motors 6 and 7 are connected through a cooling pipeline 13. Still include respectively with left and right oil-cooled radiator 11, 12 integrated oil pump, the cooling oil process in the oil pump left side oil-cooled radiator 11 flow direction hybrid motor 8, after right oil-cooled radiator 12, right driving motor 7 and right drive mechanism 5 of process in proper order again, flow back to right driving motor 7 and pass through cooling pipeline 13 flows in proper order left side driving motor 6 and left drive mechanism 4, and the flow through again left side driving motor 6 finally flows back left side oil-cooled radiator 11. The left and right transmission mechanisms 4 and 5 respectively comprise a transmission housing 41 and a first gear 42, a second gear 43, a third gear 44, a fourth gear 45 and a fifth gear 46 which are arranged in the transmission housing 41, wherein the first gear 42 is connected with the output shaft of the corresponding left or right driving motor 6/7, the second gear 43 is respectively meshed with the first gear 42 and the third gear 44, the third gear 44 is respectively meshed with the fourth gear 45 and the fifth gear 46, the fourth gear 45 is connected with the hybrid motor 8, and the fifth gear 46 is connected with the corresponding left or right driving wheel 2/3. The fourth gears 45 of the left and right transmission mechanisms 4 and 5 are respectively connected with the output shaft 841 of the second hybrid rotor 84 of the hybrid motor 8 and the output shaft 831 of the first hybrid rotor 83 through corresponding left and right transmission half shafts 9 and 10, that is, the fourth gear 45 of the left transmission mechanism 4 is connected with the output shaft 841 of the second hybrid rotor 84 of the hybrid motor 8 through the left transmission half shaft 9, and the fourth gear 45 of the right transmission mechanism 5 is connected with the output shaft 831 of the first hybrid rotor 83 of the hybrid motor 8 through the right transmission half shaft 10. The drive axle support 1 plays a role in supporting and connecting, the left and right drive wheels 2 and 3 are connected with output shafts of the left and right transmission mechanisms 4 and 5, the output shafts of the left and right transmission mechanisms 4 and 5 are connected with rotor output shafts of the left and right transmission half shafts 9 and 10 and a rotor output shaft of the hybrid motor 8 through a left ball head and a right ball head, and the left and right transmission mechanisms 4 and 5 form a drive chain loop. The cooling loop adopts oil cooling, the arrows in fig. 3 show the flow direction of the cooling oil, the cooling oil firstly flows through the left oil-cooled radiator 11, flows to the mixing motor 8, then flows through the right oil-cooled radiator 12, the right driving motor 7 and the right transmission mechanism 5, flows into the left driving motor 6 and the left transmission mechanism 4 through the cooling pipeline 13, and finally flows into the left oil-cooled radiator 11 through the cooling oil outlet of the left driving motor 6.
Referring to fig. 4, fig. 4 is a schematic structural diagram of a hybrid motor 8 according to an embodiment of the present invention. The hybrid motor 8 of the present embodiment includes a hybrid motor housing 81, an outer stator 82, a first hybrid rotor 83, and a second hybrid rotor 84, the outer stator 82 is disposed inside the hybrid motor housing 81 and near the inner wall of the housing, the first hybrid rotor 83 is disposed inside the outer stator 82, the second hybrid rotor 84 is disposed inside the first hybrid rotor 83 and connected to the first hybrid rotor 83, and an output shaft 841 of the second hybrid rotor 84 is disposed on the same axis as an output shaft 831 of the first hybrid rotor 83. The first mixing rotor 83 includes a first rotor core 832, the first rotor core 832 is a cylindrical structure with one open end, permanent magnet layers 833 are laid on the inner wall and the outer wall of the cylinder of the first rotor core 832, one end of an output shaft 831 of the first mixing rotor 83 is mounted on the mixing motor casing 81 through a support bearing 834, and the other end of the output shaft 831 is connected with the second mixing rotor 84, that is, the other end of the output shaft 831 of the first mixing rotor 83 is mounted on the second rotor core 842 through a bearing 835. The second mixing rotor 84 includes a second rotor core 842 and a rotor winding 843 wound around the second rotor core 842, an output shaft 841 of the second mixing rotor 84 and the second rotor core 842 are preferably an integral structural member, the output shaft 841 of the second mixing rotor 84 is mounted on the mixing motor housing 81 through a bearing 844, and the other end of the second mixing rotor 84 is supported and mounted on a cylindrical end surface of the first rotor core 832 through a bearing 836.
The stator winding of the outer stator 82 of the hybrid motor 8 and the outer surface permanent magnet layer 833 of the first hybrid rotor 83 form a set of motor mechanism, and the rotor winding of the second hybrid rotor 84 and the inner surface permanent magnet layer 833 of the first hybrid rotor 83 form another set of motor mechanism, that is, the rotor winding of the first hybrid rotor 83 and the second hybrid rotor 84 is combined into a motor stator and a rotor, and both can rotate. The first mixing rotor 83 and the second mixing rotor 84 are embedded by bearings 835, 836, and finally, support both the first mixing rotor 83 and the second mixing rotor 84. The operation of the hybrid motor 8 can be controlled by an electric control device and a software algorithm with high mixing degree in the prior art.
Referring to fig. 5, fig. 5 is a schematic view illustrating a turning principle of the vehicle according to the present invention. The invention adopts the left and right driving wheels 2, 3 to realize turning by electronic differential, the left and right driving motors 6, 7 realize different rotating speed differences according to the turning requirement, and the hybrid motor 8 realizes corresponding rotating speed differences along with the left and right driving motors 6, 7. When the vehicle turns around a curve, the electronic differential speed is used for controlling, so that a rotation speed difference exists between the left driving wheel 2 and the right driving wheel 3, namely the electric control device controls the left driving motor 6 and the right driving motor 7 to realize different rotation speed differences, and meanwhile, the first mixing rotor 83 also realizes different rotation speed differences by following the left driving motor 6 and the right driving motor 7 through the electric control device, so as to realize the purpose of electronic differential speed. As shown in fig. 5, when the vehicle turns, the rotation speed of the left driving wheel 2 at the inner side of the curve is lower than that of the right driving wheel 3 at the outer side of the curve, so as to realize the turning operation of the vehicle, and at this time, the rotation speeds of the three motors of the left and right driving motors 6 and 7 and the hybrid motor 8 need to be controlled by the electric control device to realize the rotation speed difference between the left and right driving wheels 2 and 3. The rotating speed of the left driving wheel 2 on the inner side of the curve is less than that of the right driving wheel 3 on the outer side of the curve, namely the rotating speed of the left driving motor 6 is less than that of the right driving motor 7, at the moment, the electronic control device judges the vehicle state according to the vehicle sensor, controls the rotating speed of the left driving motor 6 to be less than that of the right driving motor 7, and simultaneously controls the rotating speed of the first mixing rotor 83 to be greater than that of the second mixing rotor 84, so that the vehicle turns.
The left and right driving motors 6 and 7 and the hybrid motor 8 of the invention are three power output sources, and the three power sources are coupled and output to the left and right driving wheels 2 and 3 through the left and right transmission mechanisms 4 and 5 to drive the vehicle to run. The left and right driving motors 6 and 7 comprise left and right driving motor shells, left and right driving motor stators, left and right driving motor rotors, and the transmission of power is completed through the left and right transmission mechanisms 4 and 5. The hybrid motor 8 is a two-end output shaft, the output shaft 831 of the first hybrid rotor 83 and the output shaft 841 of the second hybrid rotor 84 are respectively connected with the left and right transmission half shafts 9 and 10 through splines, and the left and right transmission half shafts 9 and 10 are connected to the left and right transmission mechanisms 4 and 5 through the left and right ball heads, so that the power transmission between the hybrid motor 8 and the left and right transmission mechanisms 4 and 5 is realized.
The left and right driving motors 6 and 7 and the hybrid motor 8 can comprise three driving modes, in a normal mode, the left and right driving motors 6 and 7 drive, meanwhile, the left and right transmission mechanisms 4 and 5 transmit partial power to the hybrid motor 8, and the hybrid motor 8 generates power and charges a vehicle-mounted power battery; in the extreme mode, the left and right driving motors 6 and 7 and the hybrid motor 8 are driven; and in the high-speed cruising mode, the hybrid motor 8 drives the generators of the left and right driving motors 6 and 7, and charges the vehicle-mounted power battery to improve the driving mileage of the vehicle.
The left and right driving motors 6 and 7 are driven, when the hybrid motor 8 generates electricity, the power sources are the left and right driving motors 6 and 7 and are driven by the left and right transmission mechanisms 4 and 5, meanwhile, the output shafts of the left and right transmission mechanisms 4 and 5 can follow the input of the power sources, part of power is transmitted to the hybrid motor 8, and at the moment, the hybrid motor 8 is specially responsible for electricity generation through the electric control device and charges a vehicle-mounted power battery, so that the endurance mileage of the vehicle is improved. At this time, the electric control device sets the left and right driving motors 6 and 7 as driving state instructions, power is transmitted to the left and right driving wheels 2 and 3 through the left and right transmission mechanisms 4 and 5, meanwhile, the left and right transmission mechanisms 4 and 5 also transmit part of the power to the hybrid motor 8, the hybrid motor 8 sets power generation instructions through the electric control device, and at this time, the hybrid motor 8 is in a power generation state and transmits power to the vehicle-mounted power battery.
In some more extreme states, the three motors of the left and right driving motors 6, 7 and the hybrid motor 8 are all used as driving, i.e., the left driving motor, the right driving motor and the hybrid motor 8 are all in a driving state. The vehicle is in a superposed driving state of three power sources, and can meet the requirement of stronger dynamic property. At the moment, the electric control device sets the left and right driving motors 6 and 7 and the hybrid motor 8 as driving state instructions, and power is coupled through the left and right transmission mechanisms 4 and 5 and then transmitted to wheels, so that the three motors work simultaneously, and the strongest power output is achieved.
When the vehicle is cruising at a high speed, the vehicle has relatively stable power demand, can be switched to be driven by the hybrid motor 8, and the left and right driving motors 6 and 7 are used as generators to charge the vehicle-mounted power battery so as to improve the cruising mileage of the vehicle. At this time, the electric control device sets the hybrid motor 8 as a driving state instruction, power is transmitted to the left and right driving wheels 2 and 3 through the left and right transmission mechanisms 4 and 5 respectively, meanwhile, the left and right transmission mechanisms 4 and 5 also transmit partial power to the left and right driving motors 6 and 7 respectively, the left and right driving motors 6 and 7 give a power generation instruction through the electric control device, and at this time, the left and right driving motors 6 and 7 are in a power generation state and transmit power to the vehicle-mounted power battery.
According to the electric drive axle system, the working states (driving or power generation states) of the three motors are controlled, so that the dynamic requirement of the whole vehicle is enhanced, and the endurance mileage is increased; compared with a water cooling system, the integrated serial oil cooling mode is adopted, and a water jacket and other auxiliary parts such as a cooling water tank system and the like do not need to be designed outside the shell, so that the system integration level is improved.
The present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof, and it should be understood that various changes and modifications can be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (10)

1. An electric drive axle system of a new energy automobile, characterized by comprising:
a transaxle bracket;
the left and right transmission mechanisms are symmetrically arranged on the drive axle bracket and are correspondingly connected with left and right driving wheels of the new energy automobile;
the hybrid motor is arranged on the drive axle bracket and is respectively connected with the left transmission mechanism and the right transmission mechanism;
the left driving motor and the right driving motor are respectively arranged on the drive axle bracket and are respectively connected with the corresponding left transmission mechanism and the right transmission mechanism, and the hybrid motor is respectively connected with the corresponding left driving motor and the corresponding right driving motor through the left transmission mechanism and the right transmission mechanism; and
the left oil-cooled radiator is connected with the left driving motor and the hybrid motor respectively, the right oil-cooled radiator is connected with the right driving motor and the hybrid motor respectively, and the left driving motor and the right driving motor are connected through a cooling pipeline.
2. The electric drive axle system of the new energy automobile according to claim 1, further comprising an oil pump integrated with the left and right oil-cooled radiators, wherein the cooling oil in the oil pump flows through the left oil-cooled radiator to the hybrid motor, then sequentially flows through the right oil-cooled radiator, the right drive motor, and the right transmission mechanism, flows back to the right drive motor, sequentially flows into the left drive motor and the left transmission mechanism through the cooling pipeline, and finally flows back to the left oil-cooled radiator through the left drive motor.
3. The electric drive axle system of the new energy automobile according to claim 1 or 2, wherein the hybrid motor includes a hybrid motor housing, an outer stator disposed in the hybrid motor housing and adjacent to an inner wall of the housing, a first hybrid rotor disposed in the outer stator, and a second hybrid rotor disposed in the first hybrid rotor and connected to the first hybrid rotor, an output shaft of the second hybrid rotor being on the same axis as an output shaft of the first hybrid rotor.
4. The electric drive axle system of the new energy automobile according to claim 3, wherein the first hybrid rotor comprises a first rotor core, the first rotor core is of a cylindrical structure with an opening at one end, permanent magnet layers are coated on both the inner wall and the outer wall of the cylinder of the first rotor core, one end of an output shaft of the first hybrid rotor is mounted on the hybrid motor shell through a support bearing, and the other end of the output shaft of the first hybrid rotor is connected with the second hybrid rotor.
5. The electric drive axle system of the new energy automobile according to claim 4, wherein the second hybrid rotor includes a second rotor core and a rotor winding wound around the second rotor core, an output shaft of the second hybrid rotor is an integral structural member with the second rotor core, and the other end of the output shaft of the first hybrid rotor is mounted on the second rotor core through a bearing.
6. The electric drive axle system of the new energy automobile according to claim 3, wherein the left and right transmission mechanisms respectively comprise a transmission housing and a first gear, a second gear, a third gear, a fourth gear and a fifth gear mounted in the transmission housing, the first gear is connected with an output shaft of the corresponding left or right drive motor, the second gear is respectively engaged with the first gear and the third gear, the third gear is respectively engaged with the fourth gear and the fifth gear, the fourth gear is connected with the hybrid motor, and the fifth gear is connected with the corresponding left or right drive wheel.
7. The electric drive axle system of the new energy automobile according to claim 6, wherein the fourth gear of the left transmission mechanism is connected with the output shaft of the second hybrid rotor of the hybrid electric machine through a left transmission half shaft, and the fourth gear of the right transmission mechanism is connected with the output shaft of the first hybrid rotor of the hybrid electric machine through a right transmission half shaft.
8. The electric drive axle system of the new energy automobile as claimed in claim 7, wherein the left and right driving wheels are electronically differentially driven to realize turning, the left and right driving motors realize different rotational speed differences according to turning requirements, and the hybrid motor follows the left and right driving motors to realize corresponding rotational speed differences.
9. The electric drive axle system of the new energy automobile according to claim 7, wherein the left and right driving motors and the hybrid motor include three driving modes, and in the normal mode, the left and right driving motors are driven, and the left and right transmission mechanisms transmit part of power to the hybrid motor, and the hybrid motor generates electricity and charges an on-vehicle power battery; in the extreme mode, the left driving motor, the right driving motor and the hybrid motor are driven; and in the high-speed cruising mode, the hybrid motor is driven, and the left and right driving motors generate electricity and charge the vehicle-mounted power battery to improve the driving mileage of the vehicle.
10. A new energy automobile comprising left and right drive wheels, a control device and an electric drive axle system, wherein the left and right drive wheels are connected with the electric drive axle system, and the electric drive axle system is connected with the control device, characterized in that the electric drive axle system is the electric drive axle system of any one of the preceding claims 1 to 9, and the left and right drive wheels are respectively connected with output shafts of the corresponding left and right transmission mechanisms of the electric drive axle system.
CN202010479559.2A 2020-05-29 2020-05-29 New energy automobile and electric drive axle system thereof Pending CN113733814A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010479559.2A CN113733814A (en) 2020-05-29 2020-05-29 New energy automobile and electric drive axle system thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010479559.2A CN113733814A (en) 2020-05-29 2020-05-29 New energy automobile and electric drive axle system thereof

Publications (1)

Publication Number Publication Date
CN113733814A true CN113733814A (en) 2021-12-03

Family

ID=78725152

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010479559.2A Pending CN113733814A (en) 2020-05-29 2020-05-29 New energy automobile and electric drive axle system thereof

Country Status (1)

Country Link
CN (1) CN113733814A (en)

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