CN111439117A - Coaxial two-gear planetary row electric drive axle for automobile - Google Patents
Coaxial two-gear planetary row electric drive axle for automobile Download PDFInfo
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- CN111439117A CN111439117A CN202010372361.4A CN202010372361A CN111439117A CN 111439117 A CN111439117 A CN 111439117A CN 202010372361 A CN202010372361 A CN 202010372361A CN 111439117 A CN111439117 A CN 111439117A
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- 230000005540 biological transmission Effects 0.000 description 2
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- 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
- B60K17/06—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of change-speed gearing
- B60K17/08—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of change-speed gearing of mechanical type
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Abstract
The embodiment of the invention discloses a coaxial two-gear planetary gear electric drive axle for an automobile. Driving motor's in this electric drive axle power output shaft is connected with the one-level sun gear, one-level sun gear and a plurality of one-level planetary gear external toothing, a plurality of one-level planetary gear install in the one-level planet carrier, one-level ring gear fixed mounting is in the inner wall of casing, a plurality of one-level planetary gear and one-level ring gear internal gearing, one-level planet carrier and second grade sun gear fixed connection, second grade sun gear and a plurality of second grade planetary gear external toothing, a plurality of second grade planetary gear install in the second grade planet carrier, a plurality of second grade planetary gear and second grade ring gear internal gearing, the synchronous ware motor of shifting is connected with the synchronous ware, the synchronous. By applying the scheme provided by the embodiment of the invention, when the torque and the rotating speed input by the driving motor are unchanged, high torque and low rotating speed can be output, and low torque and high rotating speed can be output, so that the driving requirements of different road conditions can be met.
Description
Technical Field
The invention relates to the technical field of electric drive axles, in particular to a coaxial two-gear planetary row electric drive axle for an automobile.
Background
At present, an electric drive axle used by a new energy vehicle is mainly a planetary gear electric drive axle.
The planetary electric drive axle in the prior art can only obtain a reduction ratio, so that when the torque and the rotating speed input by the motor are unchanged, the planetary electric drive axle can only output a fixed torque and a fixed rotating speed when working, and the output fixed torque and the fixed rotating speed are generally high torque and low rotating speed or low torque and high rotating speed.
For different road conditions, the electric drive axle is required to output high torque and low rotation speed as well as low torque and high rotation speed, so that the reduction ratio of the planetary gear electric drive axle in the prior art is single, the high torque and the low rotation speed cannot be considered, and the low torque and the high rotation speed may still not meet the driving requirements of different road conditions under the condition that the motor runs at full power or the highest output rotation speed.
Disclosure of Invention
The invention provides a coaxial two-gear planetary power transmission axle for an automobile, which can meet the driving requirements of different road conditions. The specific technical scheme is as follows:
in a first aspect, the invention provides a coaxial two-gear planetary gear train electric drive axle for an automobile, which comprises a primary sun gear, a plurality of primary planetary gears, a primary planet carrier, a primary gear ring, a secondary sun gear, a plurality of secondary planetary gears, a secondary planet carrier, a secondary gear ring, a synchronizer, a differential, a synchronizer gear shifting motor, a driving motor and a shell;
the primary sun gear, the primary planet carrier, the primary gear ring, the secondary sun gear, the secondary planet carrier, the secondary gear ring, the differential and the synchronizer are coaxial, the axis of each primary planet gear is parallel to the axis of the primary sun gear, the axis of each secondary planet gear is parallel to the axis of the secondary sun gear, and the primary sun gear, the plurality of primary planet gears, the primary planet carrier, the primary gear ring, the secondary sun gear, the plurality of secondary planet gears, the secondary planet carrier, the secondary gear ring, the synchronizer, the differential, the synchronizer shift motor and the driving motor are all installed in the shell;
a power output shaft of the driving motor is connected with the primary sun gear, the primary sun gear is externally meshed with the primary planetary gears, the primary planetary gears are mounted on the primary planet carrier, the primary gear ring is fixedly mounted on the inner wall of the shell, the primary planetary gears are internally meshed with the primary gear ring, the primary planet carrier is fixedly connected with the secondary sun gear, the secondary sun gear is externally meshed with the secondary planetary gears, the secondary planetary gears are mounted on the secondary planet carrier, the secondary planetary gears are internally meshed with the secondary gear ring, the synchronizer gear shifting motor is connected with the synchronizer, and the synchronizer is connected with the differential mechanism;
when the synchronizer gear shifting motor receives a first control instruction, the synchronizer gear shifting motor executes the first control instruction, the synchronizer is connected with the first-stage sun gear, when the synchronizer gear shifting motor receives a second control instruction, the synchronizer gear shifting motor executes the second control instruction, the synchronizer is connected with the second-stage planet carrier, wherein the first control instruction is sent when the controller of the automobile detects that the automobile meets a high-speed gear shifting condition, and the second control instruction is sent when the controller of the automobile detects that the automobile meets a low-speed gear shifting condition.
Optionally, when the synchronizer shift motor receives a first control instruction, the synchronizer shift motor pushes the synchronizer to be connected with the first-stage sun gear towards a preset direction, and when the synchronizer shift motor receives a second control instruction, the synchronizer shift motor pushes the synchronizer to be connected with the second-stage planet carrier towards a direction opposite to the preset direction.
Optionally, the synchronizer is connected with the primary sun gear through a spline.
Optionally, the synchronizer is connected with the secondary planet carrier through a spline.
Optionally, the primary planet carrier includes a plurality of first planet shafts, an axis of each first planet shaft is parallel to an axis of the primary sun gear, the plurality of primary planet gears are respectively mounted on the plurality of first planet shafts through needle bearings, and the number of the first planet shafts is the same as that of the primary planet gears.
Optionally, the number of the primary planet gears is three.
Optionally, the secondary planet carrier includes a plurality of second planet shafts, an axis of each second planet shaft is parallel to an axis of the secondary sun gear, the plurality of secondary planet gears are respectively mounted on the plurality of second planet shafts through needle roller bearings, and the number of the second planet shafts is the same as that of the secondary planet gears.
Optionally, the number of the secondary planet gears is three.
Optionally, the first-stage planet carrier and the second-stage sun gear are fixedly connected through a spline.
Optionally, the first-stage planet carrier and the second-stage sun gear are integrally formed.
From the above, the coaxial two-gear planetary gear train electric drive axle for an automobile provided by the embodiment of the invention comprises a primary sun gear, a plurality of primary planet gears, a primary planet carrier, a primary gear ring, a secondary sun gear, a plurality of secondary planet gears, a secondary planet carrier, a secondary gear ring, a synchronizer, a differential, a synchronizer gear shifting motor, a drive motor and a shell, wherein the primary sun gear, the primary planet carrier, the primary gear ring, the secondary sun gear, the secondary planet carrier, the secondary gear ring, the differential and the synchronizer are coaxial, the axis of each primary planet gear is parallel to the axis of the primary sun gear, the axis of each secondary planet gear is parallel to the axis of the secondary sun gear, and the primary sun gear, the plurality of primary planet gears, the primary planet carrier, the primary gear ring, the secondary sun gear, the plurality of secondary planet gears, the secondary planet carrier, the secondary gear ring, the synchronizer, The differential mechanism, the synchronizer gear shifting motor and the driving motor are all arranged in the shell. When the torque and the rotating speed input by the driving motor are unchanged, when the synchronizer gear shifting motor receives a first control instruction, the synchronizer gear shifting motor executes the first control instruction, the synchronizer is connected with the first-stage sun gear to obtain a low reduction ratio and output low torque and high rotating speed, when the synchronizer gear shifting electric connector receives a second control instruction, the synchronizer gear shifting motor executes the second control instruction, the synchronizer is connected with the second-stage planet carrier to obtain a high reduction ratio, and high torque and low rotating speed are output. Therefore, the coaxial two-gear planetary gear electric drive axle for the automobile provided by the embodiment of the invention is not a single reduction ratio any more, can output high torque and low rotation speed as well as low torque and high rotation speed when the torque and the rotation speed input by the driving motor are not changed, and can meet the driving requirements of different road conditions. Of course, not all of the advantages described above need to be achieved at the same time in the practice of any one product or method of the invention.
The innovation points of the embodiment of the invention comprise:
1. when the torque and the rotating speed input by the driving motor are unchanged, when the synchronizer gear shifting motor receives a first control instruction, the synchronizer gear shifting motor executes the first control instruction, the synchronizer is connected with the first-stage sun gear to obtain a low reduction ratio and output low torque and high rotating speed, when the synchronizer gear shifting electric connector receives a second control instruction, the synchronizer gear shifting motor executes the second control instruction, the synchronizer is connected with the second-stage planet carrier to obtain a high reduction ratio, and high torque and low rotating speed are output. Therefore, the coaxial two-gear planetary gear electric drive axle for the automobile provided by the embodiment of the invention is not a single reduction ratio any more, can output high torque and low rotation speed as well as low torque and high rotation speed when the torque and the rotation speed input by the driving motor are not changed, and can meet the driving requirements of different road conditions.
2. Different reduction ratios are obtained, the range of torque and rotating speed output by the electric drive axle can be enlarged, and the climbing capacity of the automobile is improved. Moreover, because the range of the torque and the rotating speed output by the electric drive axle is large, the range of the torque and the rotating speed which can be reached by the motor of the automobile can be relatively small, so that the requirement on the motor is lower, therefore, the automobile can use the motor with lower standard, and the purpose of saving energy is achieved.
3. The synchronizer is shifted to the left through the synchronizer gear shifting motor, so that the synchronizer is connected with the first-level sun gear to obtain a first speed reduction ratio, the synchronizer is shifted to the right through the synchronizer gear shifting motor to be connected with the second-level planet carrier to obtain a second speed reduction ratio, the synchronizer is not a single speed reduction ratio any more, and the driving requirements of different road conditions can be met.
4. Compared with a common planetary gear mechanism, the two-stage planetary gear speed reducing mechanism can provide a larger speed reducing ratio, and compared with a tower-type planetary gear mechanism, the two-stage planetary gear speed reducing mechanism is complex to machine and simple to machine.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It is to be understood that the drawings in the following description are merely exemplary of some embodiments of the invention. For a person skilled in the art, without inventive effort, further figures can be obtained from these figures.
Fig. 1 is a schematic structural diagram of a coaxial two-gear planetary electric drive axle for an automobile according to an embodiment of the present invention.
In fig. 1, a first-stage sun gear 1, a first-stage planetary gear 2, a first-stage planet carrier 3, a first-stage gear ring 4, a second-stage sun gear 5, a second-stage planetary gear 6, a second-stage planet carrier 7, a second-stage gear ring 8, a synchronizer 9, a differential 10, a synchronizer gear shifting motor 11, a driving motor 12 and a shell 13.
Detailed Description
The technical solution in 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. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.
It is to be noted that the terms "comprises" and "comprising" and any variations thereof in the embodiments and drawings of the present invention are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.
The embodiment of the invention discloses a coaxial two-gear planetary gear electric drive axle for an automobile, which can obtain different reduction ratios and meet the driving requirements of different road conditions. The following provides a detailed description of embodiments of the invention.
Fig. 1 is a schematic structural diagram of a coaxial two-gear planetary electric drive axle for an automobile according to an embodiment of the present invention. Referring to fig. 1, the coaxial two-gear planetary gear train electric drive axle for an automobile according to the embodiment of the present invention includes a primary sun gear 1, a plurality of primary planet gears 2, a primary planet carrier 3, a primary ring gear 4, a secondary sun gear 5, a plurality of secondary planet gears 6, a secondary planet carrier 7, a secondary ring gear 8, a synchronizer 9, a differential 10, a synchronizer shift motor 11, a drive motor 12, and a housing 13, wherein the primary sun gear 1, the plurality of primary planet gears 2, the primary planet carrier 3, and the primary ring gear 4 form a primary planet gear reduction mechanism, and the secondary sun gear 5, the plurality of secondary planet gears 6, the secondary planet carrier 7, and the secondary ring gear 8 form a secondary planet gear reduction mechanism.
One-level sun gear 1, one-level planet carrier 3, one-level ring gear 4, second grade sun gear 5, second grade planet carrier 7, second grade ring gear 8, differential mechanism 10 and synchronizer 9 are coaxial, the axis of every one-level planetary gear 2 is parallel with the axis of one-level sun gear 1, the axis of every second grade planetary gear 6 is parallel with the axis of second grade sun gear 5, and one-level sun gear 1, a plurality of one-level planetary gears 2, one-level planet carrier 3, one-level ring gear 4, second grade sun gear 5, a plurality of second grade planetary gears 6, second grade planet carrier 7, second grade ring gear 8, synchronizer 9, differential mechanism 10, synchronizer gear shifting motor 11 and driving motor 12 all install in casing 13.
The primary sun gear 1 is used as a power input end and is rigidly connected with a power output shaft of the driving motor 12, namely the power output shaft of the driving motor 12 is connected with the primary sun gear 1.
The rigid connection between the power output shaft and the primary sun gear 1 may be in various manners, including but not limited to the following two manners:
the first method comprises the following steps:
the power output shaft is connected with the primary sun gear 1 through a spline.
And the second method comprises the following steps:
the primary sun gear 1 may be formed integrally with the power take-off shaft.
The primary sun gear 1 is externally engaged with the plurality of primary planet gears 2, the plurality of primary planet gears 2 are mounted to the primary planet carrier 3, the primary planet carrier 3 may include a plurality of first planet shafts, each of which has an axis parallel to an axis of the primary sun gear 1, and the plurality of primary planet gears 2 are respectively mounted to the plurality of first planet shafts through needle bearings, wherein the number of the first planet shafts is the same as the number of the primary planet gears 2.
For example, the number of the primary planetary gears 2 may be three, and each of the primary planetary gears 2 has the same number of teeth and module.
With continued reference to fig. 1, the primary ring gear 4 is fixedly mounted on the inner wall of the housing 13, the plurality of primary planet gears 2 are internally meshed with the primary ring gear 4, the primary planet carrier 3 is fixedly connected with the secondary sun gear 5 as a power output end of the primary planet gear speed reducing mechanism, illustratively, the primary planet carrier 3 is fixedly connected with the secondary sun gear 5 through a spline, or the primary planet carrier 3 is integrally formed with the secondary sun gear 5.
The secondary sun gear 5 is externally engaged with the plurality of secondary planet gears 6, the plurality of secondary planet gears 6 are mounted on the secondary planet carrier 7, the secondary planet carrier 7 may include a plurality of second planet shafts, an axis of each second planet shaft is parallel to an axis of the secondary sun gear 5, the plurality of secondary planet gears 6 are respectively mounted on the plurality of second planet shafts through needle bearings, wherein the number of the second planet shafts is the same as the number of the secondary planet gears 6.
For example, the number of the secondary planet gears 6 may be three, each secondary planet gear 6 having the same number of teeth and module.
With continued reference to fig. 1, the plurality of secondary planetary gears 6 are internally meshed with the secondary ring gear 8, the synchronizer shift motor 11 is connected with the synchronizer 9, and the synchronizer 9 is connected with the differential 10, that is, in the embodiment of the present invention, the primary planetary gear speed reduction mechanism and the secondary planetary gear speed reduction mechanism are connected in series, and the power output by the primary planetary gear speed reduction mechanism is directly input to the secondary planetary gear speed reduction mechanism through the secondary sun gear 5.
The synchronizer shift motor 11 is in communication with a controller of the vehicle, and when the controller of the vehicle detects that the vehicle satisfies the high-speed shift condition, the controller of the vehicle sends a first control instruction to the synchronizer shift motor 11, that is, the first control instruction is sent when the controller of the vehicle detects that the vehicle satisfies the high-speed shift condition, where the controller of the vehicle detects that the vehicle satisfies the high-speed shift condition may detect that a vehicle condition of the vehicle satisfies the high-speed shift condition, where the vehicle condition includes a speed of the vehicle and/or a torque of the vehicle, for example: the speed of the vehicle is increased to within a preset speed range.
When the synchronizer shift motor 11 receives the first control instruction, the synchronizer shift motor 11 executes the first control instruction, and the synchronizer 9 is connected with the first-stage sun gear 1, for example, the synchronizer 9 is fixedly connected with the first-stage sun gear 1 through a spline, of course, the connection mode between the synchronizer 9 and the first-stage sun gear 1 is not limited to the spline connection, and any other connection mode that can connect the synchronizer 9 and the first-stage sun gear 1 is applicable, and the embodiment of the present invention is not limited in any way. In this case, the first reduction ratio is obtained without the reduction mechanism, and the reduction ratio is 1. In the embodiment of the invention, the first reduction ratio is a low reduction ratio, and when the torque and the rotating speed input by the driving motor 12 are unchanged, the coaxial two-gear planetary electric drive axle for the automobile provided by the embodiment of the invention outputs low torque and high rotating speed.
When the controller of the vehicle detects that the vehicle satisfies the low gear shift condition, the controller of the vehicle sends a second control command to the synchronizer shift motor 11, that is, the second control command is sent when the controller of the vehicle detects that the vehicle satisfies the low gear shift condition, wherein the detection that the controller of the vehicle satisfies the low gear shift condition may be that the controller of the vehicle detects that the vehicle condition of the vehicle satisfies the low gear shift condition, wherein the vehicle condition includes a speed of the vehicle and/or a torque of the vehicle, for example: the speed of the vehicle is reduced to within a preset speed range.
When the synchronizer shift motor 11 receives the second control command, the synchronizer shift motor 11 executes the second control command, the synchronizer 9 is connected with the secondary planet carrier 7, and exemplarily, the synchronizer 9 is fixedly connected with the secondary planet carrier 7 through a spline. At this time, the speed reduction mechanism intervenes to obtain a second speed reduction ratio of the speed reduction mechanism formed by the series connection of the first-stage planetary gear speed reduction mechanism and the second-stage planetary gear speed reduction mechanism. In the embodiment of the present invention, the second reduction ratio is a high reduction ratio, and when the torque and the rotation speed input by the driving motor 12 are not changed, the coaxial two-gear planetary transmission electric drive axle for the automobile provided by the embodiment of the present invention outputs high torque and low rotation speed.
When the synchronizer gear shifting motor 11 receives a first control instruction, the synchronizer 9 is shifted to the left, the synchronizer gear shifting motor 11 pushes the synchronizer 9 to be connected with the primary sun gear 1 towards a preset direction, at the moment, the primary planetary gear 2 revolves around the axis of the primary sun gear 1 and also rotates, the secondary planetary gear 6 revolves around the axis of the secondary sun gear 5 and also rotates, power is transmitted to the primary sun gear 1 from a power output shaft of the driving motor 12, and as the primary sun gear 1 is connected with the synchronizer 9, the power is directly transmitted into the synchronizer 9 from the primary sun gear 1 without passing through a speed reduction mechanism and then is transmitted to the differential mechanism 10 from the synchronizer 9.
When the synchronizer gear shifting motor 11 receives a second control instruction, the synchronizer 9 is shifted to the right, the synchronizer gear shifting motor 11 pushes the synchronizer 9 to be connected with the secondary planet carrier 7 in a direction opposite to the preset direction, at the moment, the primary planet gear 2 revolves around the axis of the primary sun gear 1 and also rotates, the secondary planet gear 6 revolves around the axis of the secondary sun gear 5 and also rotates, power is transmitted to the primary sun gear 1 through a power output shaft of the driving motor 12, and as the secondary planet carrier 7 is connected with the synchronizer 9, the power is input to the secondary planet gear speed reducing mechanism through the primary planet gear speed reducing mechanism, then the power is output to the synchronizer 9 from the secondary planet carrier 7 of the secondary planet gear speed reducing mechanism, and then is transmitted to the differential mechanism 10 through the synchronizer 9.
From this, shift synchronizer 9 through synchronizer gear shifting motor 11 left side for synchronizer 9 is connected with one-level sun gear 1, obtains first kind of reduction ratio, shifts synchronizer 9 through synchronizer gear shifting motor 11 right side, makes synchronizer 9 be connected with second grade planet carrier 7, obtains second kind of reduction ratio, no longer is single reduction ratio, can satisfy the driving demand of different road conditions.
As can be seen from the above, the coaxial two-gear planetary gear train electric drive axle for an automobile provided by the embodiment of the present invention includes a primary sun gear 1, a plurality of primary planet gears 2, a primary planet carrier 3, a primary ring gear 4, a secondary sun gear 5, a plurality of secondary planet gears 6, a secondary planet carrier 7, a secondary ring gear 8, a synchronizer 9, a differential 10, a synchronizer shift motor 11, a drive motor 12 and a housing 13, wherein the primary sun gear 1, the primary planet carrier 3, the primary ring gear 4, the secondary sun gear 5, the secondary planet carrier 7, the secondary ring gear 8, the differential 10 and the synchronizer 9 are coaxial, an axis of each primary planet gear 2 is parallel to an axis of the primary sun gear 1, an axis of each secondary planet gear 6 is parallel to an axis of the secondary sun gear 5, and the primary sun gear 1, the plurality of primary planet gears 2, the primary planet carrier 3, the primary ring gear 4, The secondary sun gear 5, the plurality of secondary planet gears 6, the secondary planet carrier 7, the secondary gear ring 8, the synchronizer 9, the differential 10, the synchronizer gear shifting motor 11 and the driving motor 12 are all installed in the shell 13. When the torque and the rotating speed input by the driving motor 12 are unchanged, when the synchronizer gear shifting motor 11 receives a first control instruction, the synchronizer gear shifting motor 11 executes the first control instruction, the synchronizer 9 is connected with the first-stage sun gear 1 to obtain a low reduction ratio, and outputs low torque and high rotating speed, when the synchronizer gear shifting motor 11 receives a second control instruction, the synchronizer gear shifting motor 11 executes a second control instruction, and the synchronizer 9 is connected with the second-stage planet carrier 7 to obtain a high reduction ratio, and outputs high torque and low rotating speed. Therefore, the coaxial two-gear planetary gear electric drive axle for the automobile provided by the embodiment of the invention is not a single reduction ratio any more, and can output high torque and low rotation speed as well as low torque and high rotation speed when the torque and the rotation speed input by the driving motor 12 are unchanged, so that the driving requirements of different road conditions can be met.
Meanwhile, different reduction ratios are obtained, the range of torque and rotating speed output by the electric drive axle can be enlarged, and the climbing capacity of the automobile is improved. Moreover, because the range of the torque and the rotating speed output by the electric drive axle is large, the range of the torque and the rotating speed which can be reached by the motor of the automobile can be relatively small, so that the requirement on the motor is lower, therefore, the automobile can use the motor with lower standard, and the purpose of saving energy is achieved.
Meanwhile, compared with a common planetary gear mechanism, the two-stage planetary gear speed reducing mechanism can provide a larger speed reducing ratio, and compared with a tower-type planetary gear mechanism, the two-stage planetary gear speed reducing mechanism is complex to process and simple to process.
It should be noted that the embodiment of the present invention includes a two-stage planetary gear reduction mechanism, so that there are many parts, a heavy weight and a high cost, but a large reduction ratio can be achieved.
Those of ordinary skill in the art will understand that: the figures are merely schematic representations of one embodiment, and the blocks or flow diagrams in the figures are not necessarily required to practice the present invention.
Those of ordinary skill in the art will understand that: modules in the devices in the embodiments may be distributed in the devices in the embodiments according to the description of the embodiments, or may be located in one or more devices different from the embodiments with corresponding changes. The modules of the above embodiments may be combined into one module, or further split into multiple sub-modules.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A coaxial two-gear planetary gear electric drive axle for an automobile is characterized by comprising a primary sun gear, a plurality of primary planetary gears, a primary planet carrier, a primary gear ring, a secondary sun gear, a plurality of secondary planetary gears, a secondary planet carrier, a secondary gear ring, a synchronizer, a differential, a synchronizer gear shifting motor, a drive motor and a shell;
the primary sun gear, the primary planet carrier, the primary gear ring, the secondary sun gear, the secondary planet carrier, the secondary gear ring, the differential and the synchronizer are coaxial, the axis of each primary planet gear is parallel to the axis of the primary sun gear, the axis of each secondary planet gear is parallel to the axis of the secondary sun gear, and the primary sun gear, the plurality of primary planet gears, the primary planet carrier, the primary gear ring, the secondary sun gear, the plurality of secondary planet gears, the secondary planet carrier, the secondary gear ring, the synchronizer, the differential, the synchronizer shift motor and the driving motor are all installed in the shell;
a power output shaft of the driving motor is connected with the primary sun gear, the primary sun gear is externally meshed with the primary planetary gears, the primary planetary gears are mounted on the primary planet carrier, the primary gear ring is fixedly mounted on the inner wall of the shell, the primary planetary gears are internally meshed with the primary gear ring, the primary planet carrier is fixedly connected with the secondary sun gear, the secondary sun gear is externally meshed with the secondary planetary gears, the secondary planetary gears are mounted on the secondary planet carrier, the secondary planetary gears are internally meshed with the secondary gear ring, the synchronizer gear shifting motor is connected with the synchronizer, and the synchronizer is connected with the differential mechanism;
when the synchronizer gear shifting motor receives a first control instruction, the synchronizer gear shifting motor executes the first control instruction, the synchronizer is connected with the first-stage sun gear, when the synchronizer gear shifting motor receives a second control instruction, the synchronizer gear shifting motor executes the second control instruction, the synchronizer is connected with the second-stage planet carrier, wherein the first control instruction is sent when the controller of the automobile detects that the automobile meets a high-speed gear shifting condition, and the second control instruction is sent when the controller of the automobile detects that the automobile meets a low-speed gear shifting condition.
2. The electric transaxle of claim 1 wherein the synchronizer shift motor urges the synchronizer in a predetermined direction into engagement with the primary sun gear when the synchronizer shift motor receives a first control command and urges the synchronizer in a direction opposite the predetermined direction into engagement with the secondary planet carrier when the synchronizer shift motor receives a second control command.
3. The electric transaxle of claim 1 or 2 wherein the synchronizer is splined to the primary sun gear.
4. The electric drive axle of claim 1 or 2, wherein the synchronizer is splined to the secondary planet carrier.
5. The electric drive axle of claim 1, wherein the primary planet carrier comprises a plurality of first planet shafts, each first planet shaft having an axis parallel to an axis of the primary sun gear, the plurality of primary planet gears being respectively mounted to the plurality of first planet shafts through needle bearings, wherein the number of first planet shafts is the same as the number of primary planet gears.
6. The electric transaxle of claim 5 wherein the number of the primary planetary gears is three.
7. The electric drive axle of claim 1, wherein the secondary planet carrier includes a plurality of second planet pins, each second planet pin having an axis parallel to an axis of the secondary sun gear, the plurality of secondary planet gears being respectively mounted to the plurality of second planet pins through needle bearings, wherein the number of second planet pins is the same as the number of secondary planet gears.
8. The electric transaxle of claim 7 wherein the secondary planet gears are three in number.
9. The electric transaxle of claim 1 wherein the primary planet carrier is fixedly splined to the secondary sun gear.
10. The electric drive axle of claim 1 wherein said primary planet carrier is integrally formed with said secondary sun gear.
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| CN202010372361.4A CN111439117A (en) | 2020-05-06 | 2020-05-06 | Coaxial two-gear planetary row electric drive axle for automobile |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113276600A (en) * | 2021-06-29 | 2021-08-20 | 北京北方车辆新技术孵化器有限公司 | Coaxial two-gear electric drive axle |
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| CN106671771A (en) * | 2015-11-09 | 2017-05-17 | 博格华纳公司 | Electric all-wheel drive with two-speed double reduction planetary |
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| CN212604502U (en) * | 2020-05-06 | 2021-02-26 | 常州易控汽车电子股份有限公司 | Coaxial two-gear planetary row electric drive axle for automobile |
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| CN103332108A (en) * | 2013-07-18 | 2013-10-02 | 合肥工业大学 | Two-gear power transmission system for BEV integrated planetary gear train |
| CN106671771A (en) * | 2015-11-09 | 2017-05-17 | 博格华纳公司 | Electric all-wheel drive with two-speed double reduction planetary |
| CN206510753U (en) * | 2016-11-03 | 2017-09-22 | 中国汽车工程研究院股份有限公司 | A kind of coaxial-type electric drive axle of achievable self shifter |
| CN109050228A (en) * | 2018-08-23 | 2018-12-21 | 广州汽车集团股份有限公司 | Pure electric automobile and power assembly system |
| CN212604502U (en) * | 2020-05-06 | 2021-02-26 | 常州易控汽车电子股份有限公司 | Coaxial two-gear planetary row electric drive axle for automobile |
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| CN113276600A (en) * | 2021-06-29 | 2021-08-20 | 北京北方车辆新技术孵化器有限公司 | Coaxial two-gear electric drive axle |
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