CN218489454U - Double-motor coaxial electric drive axle system - Google Patents
Double-motor coaxial electric drive axle system Download PDFInfo
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- CN218489454U CN218489454U CN202222600818.XU CN202222600818U CN218489454U CN 218489454 U CN218489454 U CN 218489454U CN 202222600818 U CN202222600818 U CN 202222600818U CN 218489454 U CN218489454 U CN 218489454U
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Abstract
The utility model relates to a double-motor coaxial electric drive axle system, which comprises a differential mechanism; a middle hollow shaft; the first motor is rotatably sleeved on the outer side of the first output half shaft and is connected with a first gear, and the first motor drives the first gear to rotate; a lateral shaft; the second motor is arranged on one side of the lateral shaft, which is far away from the first motor, the second motor is rotatably sleeved on the outer side of the middle hollow shaft, a fifth gear is connected to the second motor, and the second motor drives the fifth gear to rotate; the lateral hollow shaft is rotatably sleeved on the outer side of the lateral shaft. The utility model discloses arrange first motor and second motor respectively in the both sides of first gear module to through reasonable structure of arranging, make first gear and fifth gear can be direct mount respectively on first motor and second motor, reduced the quantity of transmission shaft, reduced the volume of electric drive axle system, reduced simultaneously and assembled the space requirement to the motor, thereby reduced the assembly degree of difficulty.
Description
Technical Field
The utility model relates to a new energy automobile transmission technical field especially relates to a coaxial electric drive axle system of bi-motor.
Background
With the gradual maturity and popularization and application of new energy technology in the passenger car field, the demand of great new energy power assembly device product has appeared in commercial vehicle, special type vehicle. However, because the existing pure electric powertrain device has a small number of gears, in order to meet the use requirements of the vehicle, the overall size and weight of the motor are too large, and a power interruption condition exists in the gear shifting process. And the device adopting double motors can not realize the coupling work of the two motors and can not give full play to the characteristics of the motors, thereby causing low efficiency of the motors in certain modes and difficult matching of the motor type selection.
The multi-mode pure electric power transmission device provided by the Chinese invention patent with the publication number of CN215971080U comprises: a first input shaft; a second input shaft; a first confluence gear; a first transmission structural unit and a second transmission structural unit; a second confluence gear; an intermediate shaft; first and second synchronizer gears; third to fifth confluence gears; a planet row; a first synchronizer; a second synchronizer; connecting the sleeve shaft; a third synchronizer gear; a third synchronizing gear sleeve; a fourth synchronizing gear sleeve; and an output shaft. The transmission device can ensure that the power of the vehicle is not interrupted when the vehicle climbs a slope, and can realize the coupling of the rotating speeds of the double motors and the power output.
However, the multi-mode pure electric power transmission device still has some defects when being applied to the mining engineering vehicle: the transmission shaft that transmission set up is more for transmission no matter radial direction's length or axial direction's length has all obtained the increase, leads to transmission volume great, and in addition, transmission's first motor and second motor are installed in same one side, and is higher to motor assembly space requirement, and the assembly degree of difficulty is great.
Therefore, the utility model provides a coaxial electric drive axle system of bi-motor solves above-mentioned problem.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a coaxial electric drive axle system of bi-motor, through reasonable arrangement, reduce the quantity of transmission shaft, reduce the volume of electric drive axle system to reduce motor assembly space requirement, thereby reduce the assembly degree of difficulty.
In order to solve the technical problem, the utility model adopts the technical scheme that: the utility model provides a bi-motor coaxial electric drive axle system which innovation point lies in: comprises that
A differential having a first output half shaft and a second output half shaft thereon;
the middle hollow shaft is rotatably sleeved on the outer side of the first output half shaft, a ninth gear, a tenth gear, an eleventh gear and a twelfth gear are rotatably sleeved on the outer side of the middle hollow shaft, a first gear shifter, a second gear shifter and a reduction planetary row are connected to the middle hollow shaft, the first gear shifter can be selectively jointed with the ninth gear or the tenth gear or separated from the ninth gear and the tenth gear, the second gear shifter can be selectively jointed with the eleventh gear or the twelfth gear or separated from the eleventh gear and the twelfth gear, and the reduction planetary row is connected with the differential;
the first motor is rotatably sleeved on the outer side of the first output half shaft and is connected with a first gear, and the first motor drives the first gear to rotate;
the lateral shaft is arranged in parallel with the first output half shaft, a second gear, a third gear and a fourth gear are connected to the lateral shaft, the second gear is meshed with the first gear, the third gear is meshed with the ninth gear, and the fourth gear is meshed with the tenth gear;
the second motor is arranged on one side, away from the first motor, of the lateral shaft, the second motor is rotatably sleeved on the outer side of the middle hollow shaft, a fifth gear is connected to the second motor, and the second motor drives the fifth gear to rotate;
the lateral hollow shaft is rotatably sleeved on the outer side of the lateral shaft, a sixth gear, a seventh gear and an eighth gear are connected to the lateral hollow shaft, the sixth gear is meshed with the fifth gear, the seventh gear is meshed with the twelfth gear, and the eighth gear is meshed with the eleventh gear.
Furthermore, the reduction planet row comprises a sun gear, a planet carrier and a gear ring, wherein the sun gear is connected with the middle hollow shaft, and the planet carrier is connected with the differential mechanism.
Further, the lateral shaft, the second gear, the third gear, the fourth gear, the lateral hollow shaft, the sixth gear, the seventh gear and the eighth gear together form a first gear module;
the dual-motor coaxial electric drive axle system further comprises a second gear module, the structure of the second gear module is the same as that of the first gear module, a second gear of the second gear module is meshed with the first gear, a third gear of the second gear module is meshed with the ninth gear, a fourth gear of the second gear module is meshed with the tenth gear, a sixth gear of the second gear module is meshed with the fifth gear, a seventh gear of the second gear module is meshed with the twelfth gear, and an eighth gear of the second gear module is meshed with the eleventh gear.
Further, the first gear module and the second gear module are symmetrically arranged about a line on which the first output half shaft is located.
The utility model has the advantages of:
(1) The utility model discloses arrange first motor and second motor respectively in the both sides of first gear module to through reasonable structure of arranging, make first gear and fifth gear directly mountable respectively on first motor and second motor, reduced the quantity of transmission shaft, reduced the volume of electric drive axle system, reduced simultaneously and assembled the space requirement to the motor, thereby reduced the assembly degree of difficulty.
(2) The utility model discloses a set up first gear module and second gear module and carry out the transmission, effectively increased gear bearing capacity.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Fig. 1 is a schematic structural diagram of a dual-motor coaxial electric drive axle system according to embodiment 1 of the present invention.
Fig. 2 is a schematic structural diagram of a dual-motor coaxial electric drive axle system according to embodiment 2 of the present invention.
Fig. 3 is a schematic structural diagram of a dual-motor coaxial electric drive axle system according to embodiment 3 of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Example 1
As shown in fig. 1, the dual-motor coaxial electric drive axle system of embodiment 1 includes:
a differential 21, the differential 21 having a first output half shaft 22 and a second output half shaft 23, the first output half shaft 22 and the second output half shaft 23 being coaxial and extending in opposite directions;
the gear shifting device comprises an intermediate hollow shaft 16, wherein the intermediate hollow shaft 16 is coaxially and rotatably sleeved outside a first output half shaft 22, a ninth gear 9, a tenth gear 11, an eleventh gear 12 and a twelfth gear 14 are sequentially and rotatably sleeved outside the intermediate hollow shaft 16 in a direction close to a differential 21, a first gear shifter 10, a second gear shifter 13 and a reduction planetary row are connected to the intermediate hollow shaft 16, the first gear shifter 10 is positioned between the ninth gear 9 and the tenth gear 11, the first gear shifter 10 can be selectively connected with the ninth gear 9 or the tenth gear 11 or separated from the ninth gear 9 and the tenth gear 11, the second gear shifter 13 is positioned between the eleventh gear 12 and the twelfth gear 14, the second gear shifter 13 can be selectively connected with the eleventh gear 12 or the twelfth gear 14 or separated from the eleventh gear 12 and the twelfth gear 14, the reduction planetary row comprises a sun gear 17, a planetary gear 18, a planetary carrier 20 and a ring gear 19, the sun gear 17 is connected with the intermediate hollow shaft 16, the planetary carrier 18 is connected with the sun gear 17 and meshed with the sun gear 17, the ring gear 20 is connected with the ring gear 21, and the ring gear 19 is connected with an axle housing 18 coaxially and meshed with a planetary gear of an electric drive system;
the first motor 24 is arranged on one side of the intermediate hollow shaft 16 far away from the differential 21, the first motor 24 is rotatably sleeved outside the first output half shaft 22, one side of the first motor 24 close to the intermediate hollow shaft 16 is connected with a first gear 8, and the first gear 8 is driven by the first motor 8 to rotate;
the lateral shaft 1 is arranged on one side, close to the middle hollow shaft 16, of the first motor 24, the lateral shaft 1 is arranged in parallel with the first output half shaft 22, a second gear 2, a third gear 3 and a fourth gear 4 are sequentially connected onto the lateral shaft 1, the second gear 2 is meshed with the first gear 8, the third gear 3 is meshed with the ninth gear 9, and the fourth gear 4 is meshed with the tenth gear 11;
the second motor 25 is arranged on one side, away from the first motor 24, of the lateral shaft 1 and is positioned on one side, away from the differential 21, of the reduction planetary row, the second motor 25 is rotatably sleeved on the outer side of the middle hollow shaft 16, a fifth gear 15 is connected to the second motor 25, and the second motor 25 drives the fifth gear 15 to rotate;
the lateral hollow shaft 26 is sleeved on the outer side of the lateral shaft 1 in a rotating mode, a sixth gear 7, a seventh gear 6 and an eighth gear 5 are connected to the lateral hollow shaft 26, the sixth gear 7 is meshed with the fifth gear 15, the seventh gear 6 is meshed with the twelfth gear 14, and the eighth gear 8 is meshed with the eleventh gear 12.
The lateral shaft 1, the second gear 2, the third gear 3, the fourth gear 4, the lateral hollow shaft 26, the sixth gear 7, the seventh gear 6 and the eighth gear 5 together form a first gear module.
In this embodiment, the manner of rotating the set includes, but is not limited to, rotating the set by a rolling bearing.
In embodiment 1, the first motor 24 and the second motor 25 are respectively arranged at two sides of the first gear module, and the first gear 8 and the fifth gear 15 can be respectively and directly mounted on the first motor 24 and the second motor 25 through a reasonable arrangement structure, so that the number of transmission shafts is reduced, the volume of an electric drive axle system is reduced, the requirement on the motor assembly space is reduced, and the assembly difficulty is reduced.
The working mode of the double-motor coaxial electric drive bridge system is as follows:
(1) Single motor operation
Power route 1: the first electric machine 24 is operated, the power is transmitted from the first gear 8 to the second gear 2, when the lateral shaft 1 is powered, when the first shifter 10 slides leftwards and engages with the ninth gear 9, the power is transmitted from the third gear 3 to the ninth gear 9, because the first shifter 10 is connected with the intermediate hollow shaft 16, the intermediate hollow shaft 16 transmits the power to the differential 21 through the reduction planetary gear set, and finally outputs to the first output half shaft 22 and the second output half shaft 23;
power route 2: the first electric machine 24 is operated, the power is transmitted from the first gear 8 to the second gear 2, when the power exists in the lateral shaft 1, when the first gear shifter 10 slides to the right and is engaged with the tenth gear 11, the power is transmitted from the third gear 4 to the tenth gear 11, because the first gear shifter 10 is connected with the intermediate hollow shaft 16, the intermediate hollow shaft 16 transmits the power to the differential 21 through the reduction planetary gear row, and finally outputs the power to the first output half shaft 22 and the second output half shaft 23;
power route 3: the second electric machine 25 is operated, the power is transmitted from the fifth gear 15 to the sixth gear 7, the lateral hollow shaft 26 has power, when the second gear shifter 13 slides leftwards to be engaged with the eleventh gear 12, the power is transmitted from the eighth gear 5 to the eleventh gear 12, and because the second gear shifter 13 is connected with the intermediate hollow shaft 16, the intermediate hollow shaft 16 transmits the power to the differential 21 through the reduction planetary gear row and finally to the first output half shaft 22 and the second output half shaft 23;
power route 4: the second electric machine 25 is operated, the power is transmitted from the fifth gear 15 to the sixth gear 7, while the lateral hollow shaft 26 is powered, and when the second gear shift 13 slides to the right, engaging with the twelfth gear 14, the power is transmitted from the seventh gear 6 to the twelfth gear 14, since the second gear shift 13 is connected to the intermediate hollow shaft 16, while the intermediate hollow shaft 16 transmits the power to the differential 21 through the reduction planetary gear set, finally outputting to the first output half shaft 22 and the second output half shaft 23.
During power switching, the power path 1 and the power path 2 transmitted by the first motor 24 are realized by engaging the first gear shifter 10 from left to right, and the power path 3 and the power path 4 transmitted by the second motor 25 are realized by engaging the second gear shifter 13 from left to right.
(2) Double motor operation
When the double motors work simultaneously, the power coupling to the intermediate hollow shaft 16 is realized through different gears, and then the power is output together, and the combined power mode is as follows:
power route 1+ power route 3;
power route 1+ power route 4;
power route 2+ power route 3;
power path 2+ power path 4.
During power switching, when the power line 1 needs to be switched to the power line 2, in order to ensure that power is not interrupted, the second gear shifter 13 can be connected with the eleventh gear 12 or the twelfth gear 14, continuous power input at the moment of gear shifting is achieved, and the power performance of the whole vehicle is ensured; similarly, when it is required to switch from the power line 3 to the power line 4, in order to ensure that the power is not interrupted, the first gear shifter 10 is engaged with the ninth gear 9 or the tenth gear 11, so that the power input at the moment of gear shifting can be continuously realized, and the power performance of the whole vehicle can be ensured.
Example 2
As shown in fig. 2, the structure of the dual-motor coaxial electric drive axle system of embodiment 2 is the same as that of embodiment 1, and the dual-motor coaxial electric drive axle system of embodiment 2 further includes a second gear module, the structure of which is the same as that of the first gear module, a second gear of the second gear module is engaged with the first gear 8, a third gear of the second gear module is engaged with the ninth gear 9, a fourth gear of the second gear module is engaged with the tenth gear 11, a sixth gear of the second gear module is engaged with the fifth gear 15, a seventh gear of the second gear module is engaged with the twelfth gear 14, and an eighth gear of the second gear module is engaged with the eleventh gear 12.
The two-motor coaxial electric drive axle system of embodiment 2 has a symmetrical structure with respect to the line in which the first output half shaft 22 is located, and the first gear module and the second gear module are disposed symmetrically with respect to the line in which the first output half shaft 22 is located.
The dual-motor coaxial electric drive axle system of embodiment 2 is driven by arranging two gear modules, and the bearing capacity of the gears is increased.
Example 3
As shown in fig. 3, the structure of the dual-motor coaxial electric drive axle system of embodiment 3 is the same as that of embodiment 2, and the first output half shaft 22 and the second output half shaft 23 are respectively connected with a wheel edge, so that the reduction ratio is increased, a torque increasing effect is achieved, the torque requirements of the first motor and the second motor are reduced under the condition of the rated output torque of the vehicle, the first motor and the second motor can adopt smaller sizes, the motor assembly is more convenient, the finally formed structure is more compact, and the dual-motor coaxial electric drive axle system is particularly suitable for large-tonnage off-road wide-body dump trucks.
It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (4)
1. A double-motor coaxial electric drive axle system is characterized in that: comprises that
A differential having a first output half shaft and a second output half shaft thereon;
the middle hollow shaft is rotatably sleeved on the outer side of the first output half shaft, a ninth gear, a tenth gear, an eleventh gear and a twelfth gear are rotatably sleeved on the outer side of the middle hollow shaft, a first gear shifter, a second gear shifter and a reduction planetary row are connected to the middle hollow shaft, the first gear shifter can be selectively jointed with the ninth gear or the tenth gear or separated from the ninth gear and the tenth gear, the second gear shifter can be selectively jointed with the eleventh gear or the twelfth gear or separated from the eleventh gear and the twelfth gear, and the reduction planetary row is connected with the differential;
the first motor is rotatably sleeved on the outer side of the first output half shaft and is connected with a first gear, and the first gear is driven by the first motor to rotate;
the lateral shaft is arranged in parallel with the first output half shaft, a second gear, a third gear and a fourth gear are connected to the lateral shaft, the second gear is meshed with the first gear, the third gear is meshed with the ninth gear, and the fourth gear is meshed with the tenth gear;
the second motor is arranged on one side, away from the first motor, of the lateral shaft, the second motor is rotatably sleeved on the outer side of the middle hollow shaft, a fifth gear is connected to the second motor, and the second motor drives the fifth gear to rotate;
the lateral hollow shaft is rotatably sleeved on the outer side of the lateral shaft, a sixth gear, a seventh gear and an eighth gear are connected to the lateral hollow shaft, the sixth gear is meshed with the fifth gear, the seventh gear is meshed with the twelfth gear, and the eighth gear is meshed with the eleventh gear.
2. The dual-motor coaxial electric drive axle system of claim 1, wherein: the speed reduction planet row comprises a sun wheel, a planet carrier and a gear ring, the sun wheel is connected with the middle hollow shaft, and the planet carrier is connected with the differential mechanism.
3. The dual-motor coaxial electric drive axle system of claim 1, wherein: the lateral shaft, the second gear, the third gear, the fourth gear, the lateral hollow shaft, the sixth gear, the seventh gear and the eighth gear form a first gear module together;
the dual-motor coaxial electric drive axle system further comprises a second gear module, the structure of the second gear module is the same as that of the first gear module, a second gear of the second gear module is meshed with the first gear, a third gear of the second gear module is meshed with a ninth gear, a fourth gear of the second gear module is meshed with a tenth gear, a sixth gear of the second gear module is meshed with a fifth gear, a seventh gear of the second gear module is meshed with a twelfth gear, and an eighth gear of the second gear module is meshed with an eleventh gear.
4. The dual-motor coaxial electric drive axle system of claim 3, wherein: the first gear module and the second gear module are arranged symmetrically with respect to a line on which the first output half shaft is located.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222600818.XU CN218489454U (en) | 2022-09-30 | 2022-09-30 | Double-motor coaxial electric drive axle system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222600818.XU CN218489454U (en) | 2022-09-30 | 2022-09-30 | Double-motor coaxial electric drive axle system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218489454U true CN218489454U (en) | 2023-02-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222600818.XU Active CN218489454U (en) | 2022-09-30 | 2022-09-30 | Double-motor coaxial electric drive axle system |
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|---|---|
| CN (1) | CN218489454U (en) |
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- 2022-09-30 CN CN202222600818.XU patent/CN218489454U/en active Active
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