CN212604505U - 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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- CN212604505U CN212604505U CN202020722211.7U CN202020722211U CN212604505U CN 212604505 U CN212604505 U CN 212604505U CN 202020722211 U CN202020722211 U CN 202020722211U CN 212604505 U CN212604505 U CN 212604505U
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Abstract
The utility model discloses a two fender planet row electric drive axles of coaxial-type for car. The sun gear, the planet carrier, the gear ring, the differential and the synchronizer in the electric drive axle are coaxial, and the first planetary gear and the second planetary gear are coaxial and are parallel to the axis of the sun gear; a power output shaft of the driving motor is connected with a sun gear, the sun gear is externally meshed with a first planetary gear, the first planetary gear is fixedly connected with a second planetary gear, the second planetary gear is internally meshed with a gear ring, the first planetary gear and the second planetary gear are mounted on a planet carrier, the gear ring is fixedly mounted on the inner wall of a shell, a synchronizer gear shifting motor is connected with a synchronizer, and the synchronizer is connected with a differential mechanism. Use the embodiment of the utility model provides a scheme both can export high moment of torsion and low rotational speed and can export low moment of torsion and high rotational speed again when the moment of torsion and the rotational speed of driving motor input are unchangeable, can satisfy the driving demand of different road conditions.
Description
Technical Field
The utility model relates to an electric drive axle technical field particularly, relates to a two keep off planet row electric drive axles of coaxial type for car.
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.
SUMMERY OF THE UTILITY MODEL
The utility model provides a two fender planet of coaxial-type are arranged electric drive axle for car can satisfy the driving demand of different road conditions. The specific technical scheme is as follows:
in a first aspect, the utility model provides a two keep off planet row electric drive axles of coaxial-type for car, including sun gear, first planetary gear, second planetary gear, planet carrier, ring gear, synchronous ware, differential mechanism, synchronous ware gear shifting motor, driving motor and casing;
the sun gear, the planet carrier, the gear ring, the differential and the synchronizer are coaxial, the first planetary gear and the second planetary gear are coaxial and are parallel to the axis of the sun gear, and the sun gear, the first planetary gear, the second planetary gear, the planet carrier, the gear ring, the synchronizer, the differential, the synchronizer gear shifting motor and the driving motor are all arranged in the shell;
a power output shaft of the driving motor is connected with the sun gear, the sun gear is externally meshed with the first planetary gear, the first planetary gear is fixedly connected with the second planetary gear, the second planetary gear is internally meshed with the gear ring, the first planetary gear and the second planetary gear are mounted on the planet carrier, the gear ring is fixedly mounted on the inner wall of the shell, 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 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 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, the pitch circle diameter of the first planet gear is larger than the pitch circle diameter of the second planet gear.
Optionally, when the synchronizer gear shifting motor receives a first control instruction, the synchronizer gear shifting motor pushes the synchronizer to be connected with the sun gear towards a preset direction, and when the synchronizer gear shifting motor receives a second control instruction, the synchronizer gear shifting motor pushes the synchronizer to be connected with the planet carrier towards a direction opposite to the preset direction.
Optionally, the synchronizer is connected with the sun gear through a spline.
Optionally, the synchronizer is connected with the planet carrier through a spline.
Optionally, the planet carrier is provided with a planet gear shaft, an axis of the planet gear shaft is parallel to an axis of the sun gear, and the first planet gear and the second planet gear are respectively mounted on the planet gear shaft through needle bearings.
Optionally, the first planet gear is fixedly connected with the second planet gear through a spline.
Optionally, the synchronizer is connected with the differential through a spline.
Optionally, the power output shaft is connected with the sun gear through a spline.
Optionally, the sun gear and the power output shaft are integrally formed.
According to the above, the embodiment of the present invention provides a coaxial two-gear planetary gear drive axle for automobile, which comprises a sun gear, a first planetary gear, a second planetary gear, a planet carrier, a gear ring, a synchronizer, a differential mechanism, a synchronizer gear shifting motor, a driving motor and a casing, wherein the sun gear, the planet carrier, the gear ring, the differential mechanism and the synchronizer are coaxial, the first planetary gear is coaxial with the second planetary gear and parallel to the axis of the sun gear, and the sun gear, the first planetary gear, the second planetary gear, the planet carrier, the gear ring, the synchronizer, the differential mechanism, the synchronizer gear shifting motor and the driving motor are all installed in the casing. 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 sun gear to obtain a low reduction ratio and output low torque and high rotating speed, when the synchronizer gear shifting motor receives a second control instruction, the synchronizer gear shifting motor executes a second control instruction, the synchronizer is connected with the planet carrier to obtain a high reduction ratio and output high torque and low rotating speed. Therefore, the embodiment of the utility model provides a two keep off planet row electric transaxles of coaxial-type for car no longer is single reduction ratio, when the moment of torsion and the rotational speed of driving motor input are unchangeable, both can export high moment of torsion and low rotational speed and can export low moment of torsion and high rotational speed again, can satisfy the driving demand of different road conditions. Of course, it is not necessary for any product or method of the invention to achieve all of the above-described advantages at the same time.
The utility model discloses innovation point includes:
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 sun gear to obtain a low reduction ratio and output low torque and high rotating speed, when the synchronizer gear shifting motor receives a second control instruction, the synchronizer gear shifting motor executes a second control instruction, the synchronizer is connected with the planet carrier to obtain a high reduction ratio and output high torque and low rotating speed. Therefore, the embodiment of the utility model provides a two keep off planet row electric transaxles of coaxial-type for car no longer is single reduction ratio, when the moment of torsion and the rotational speed of driving motor input are unchangeable, both can export high moment of torsion and low rotational speed and can export low moment of torsion and high rotational speed again, can satisfy the driving demand 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 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 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. The tower-type planetary gear mechanism is smaller in size than a two-stage planetary gear reduction mechanism in the case of achieving the same reduction ratio.
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, 1 sun gear, 2 first planetary gear, 3 second planetary gear, 4 planetary carrier, 5 ring gear, 6 synchronizer, 7 differential, 8 synchronizer shift motor, 9 drive motor, 10 shell.
Detailed Description
The technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiment of the present invention. It is obvious that the described embodiments are only some of the embodiments of the present invention, and not all of them. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without any creative effort belong to the protection scope of the present invention.
It should 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 utility model discloses a two keep off planet row electric drive axles of coaxial-type for car can obtain different reduction ratios, satisfies the driving demand of different road conditions. The embodiments of the present invention will be described in detail below.
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, an embodiment of the present invention provides a coaxial two-gear planetary gear train electric drive axle for an automobile, including a sun gear 1, a first planetary gear 2, a second planetary gear 3, a planet carrier 4, a gear ring 5, a synchronizer 6, a differential 7, a synchronizer shift motor 8, a drive motor 9, and a housing 10.
The relationship between the first planet gear 2 and the second planet gear 3 may be that the pitch circle diameter of the first planet gear 2 is larger than the pitch circle diameter of the second planet gear 3, or the pitch circle diameter of the first planet gear 2 is smaller than the pitch circle diameter of the second planet gear 3, or the pitch circle diameter of the first planet gear 2 is equal to the pitch circle diameter of the second planet gear 3, which is not limited herein.
The sun gear 1, the first planetary gears 2, the second planetary gears 3, the carrier 4, and the ring gear 5 constitute a planetary gear speed reduction mechanism.
The sun gear 1, the planet carrier 4, the gear ring 5, the differential 7 and the synchronizer 6 are coaxial, the first planet gear 2 and the second planet gear 3 are coaxial and parallel to the axis of the sun gear 1, and the sun gear 1, the first planet gear 2, the second planet gear 3, the planet carrier 4, the gear ring 5, the synchronizer 6, the differential 7, the synchronizer gear shifting motor 8 and the driving motor 9 are all installed in the shell 10.
The sun gear 1 is used as a power input end and is rigidly connected with a power output shaft of the driving motor 9, namely, the power output shaft of the driving motor 9 is connected with the sun gear 1.
The rigid connection between the power output shaft and the 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 sun gear 1 through a spline.
And the second method comprises the following steps:
the sun gear 1 may be formed integrally with the power take-off shaft.
The sun gear 1 is externally engaged with the first planet gears 2, the first planet gears 2 are fixedly connected with the second planet gears 3, and the first planet gears 2 are fixedly connected with the second planet gears 3 through splines. The first planetary gears 2 and the second planetary gears 3 are mounted to a carrier 4, the carrier 4 is provided with planetary gear shafts whose axes are parallel to the axis of the sun gear 1, the first planetary gears 2 and the second planetary gears 3 are mounted to the planetary gear shafts through needle bearings, respectively, and the first planetary gears 2 and the second planetary gears 3 form a tower type planetary gear.
With continued reference to fig. 1, the second planetary gear 3 is internally meshed with a ring gear 5, the ring gear 5 is fixedly mounted on an inner wall of a housing 10, a synchronizer shift motor 8 is connected with a synchronizer 6, the synchronizer 6 is connected with a differential 7, and the synchronizer 6 is connected with the differential 7 through splines, for example.
The synchronizer gear shifting motor 8 is in communication connection with a controller of the automobile, when the controller of the automobile detects that the automobile meets a high-speed gear shifting condition, the controller of the automobile sends a first control instruction to the synchronizer gear shifting motor 8, namely the first control instruction is sent when the controller of the automobile detects that the automobile meets the high-speed gear shifting condition, wherein the controller of the automobile detects that the automobile meets the high-speed gear shifting condition, and the controller of the automobile can detect that the automobile condition meets the high-speed gear shifting condition, wherein the automobile condition comprises the speed of the automobile and/or the torque of the automobile, for example: the speed of the vehicle is increased to within a preset speed range.
When the synchronizer gear shifting motor 8 receives a first control instruction, the synchronizer gear shifting motor 8 executes the first control instruction, the synchronizer 6 is connected with the sun gear 1, exemplarily, the synchronizer 6 is fixedly connected with the sun gear 1 through a spline, of course, the connection mode between the synchronizer 6 and the sun gear 1 is not limited to the spline connection, and any other connection mode capable of connecting the synchronizer 6 with the sun gear 1 is applicable, and the embodiment of the present invention is not limited thereto. In this case, the first reduction ratio is obtained without the reduction mechanism, and the reduction ratio is 1. The embodiment of the utility model provides an in, first reduction ratio is low reduction ratio, and when the moment of torsion and the rotational speed of driving motor 9 input were unchangeable, the embodiment of the utility model provides a low moment of torsion of coaxial-type two fender planet row electric drive axle output and high rotational speed for the car.
When the controller of the vehicle detects that the vehicle satisfies the low-speed gear shifting condition, the controller of the vehicle sends a second control instruction to the synchronizer gear shifting motor 8, that is, the second control instruction is sent when the controller of the vehicle detects that the vehicle satisfies the low-speed gear shifting condition, wherein the controller of the vehicle detects that the vehicle satisfies the low-speed gear shifting condition, and the controller of the vehicle can detect that the vehicle condition of the vehicle satisfies the low-speed gear shifting condition, wherein the vehicle condition includes the speed of the vehicle and/or the torque of the vehicle, for example: the speed of the vehicle is reduced to within a preset speed range.
When the synchronizer shift motor 8 receives the second control instruction, the synchronizer shift motor 8 executes the second control instruction, the synchronizer 6 is connected with the planet carrier 4, and exemplarily, the synchronizer 6 is fixedly connected with the planet carrier 4 through a spline. At this time, a second reduction ratio, which is the reduction ratio of the planetary gear reduction mechanism, is obtained with the interposition of the reduction mechanism. The embodiment of the utility model provides an in, second kind reduction ratio is high reduction ratio, and when the moment of torsion and the rotational speed of driving motor 9 input were unchangeable, the embodiment of the utility model provides a two fender planet of coaxial-type electricity driving axle output high moment of torsion and low rotational speed for the car.
When the synchronizer gear shifting motor 8 receives a first control instruction, the synchronizer 6 is shifted to the left, the synchronizer gear shifting motor 8 pushes the synchronizer 6 to be connected with the sun gear 1 towards a preset direction, at the moment, the first planetary gear 2 and the second planetary gear 3 form a tower type planetary gear which revolves around the axis of the sun gear 1 and also rotates, power is transmitted to the sun gear 1 through a power output shaft of the driving motor 9, and the sun gear 1 is connected with the synchronizer 6, so that the power is directly transmitted to the synchronizer 6 from the sun gear 1 without passing through a planetary gear speed reducing mechanism and then is transmitted to the differential mechanism 7 through the synchronizer 6.
When the synchronizer shift motor 8 receives the second control instruction, the synchronizer 6 is shifted to the right, the synchronizer shift motor 8 pushes the synchronizer 6 to be connected with the planet carrier 4 in the direction opposite to the preset direction, at this time, the first planetary gear 2 and the second planetary gear 3 form a tower type planetary gear which revolves around the axis of the sun gear 1 and also rotates, power is transmitted to the sun gear 1 through the power output shaft of the driving motor 9, and the planet carrier 4 is connected with the synchronizer 6, so that the power is output to the synchronizer 6 from the planet carrier 4 through the planetary gear reduction mechanism and then is transmitted to the differential mechanism 7 through the synchronizer 6.
From this, dial synchronizer 6 through 8 left sides of synchronizer gear shifting motor for synchronizer 6 is connected with sun gear 1, obtains first kind of reduction ratio, dials synchronizer 6 through 8 right sides of synchronizer gear shifting motor, makes synchronizer 6 be connected with planet carrier 4, 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 embodiment of the present invention provides a coaxial two-gear planetary gear train electric drive axle for an automobile, which includes a sun gear 1, a first planetary gear 2, a second planetary gear 3, a planet carrier 4, a gear ring 5, a synchronizer 6, a differential 7, a synchronizer shift motor 8, a drive motor 9 and a housing 10, wherein the sun gear 1, the planet carrier 4, the gear ring 5, the differential 7 and the synchronizer 6 are coaxial, the first planetary gear 2 is coaxial with the second planetary gear 3 and parallel to the axis of the sun gear 1, and the sun gear 1, the first planetary gear 2, the second planetary gear 3, the planet carrier 4, the gear ring 5, the synchronizer 6, the differential 7, the synchronizer shift motor 8 and the drive motor 9 are all installed in the housing 10. When the torque and the rotating speed input by the driving motor 9 are unchanged, when the synchronizer gear shifting motor 8 receives a first control instruction, the synchronizer gear shifting motor 8 executes the first control instruction, the synchronizer 6 is connected with the sun gear 1 to obtain a low reduction ratio and output low torque and high rotating speed, when the synchronizer gear shifting motor 8 receives a second control instruction, the synchronizer gear shifting motor 8 executes a second control instruction, the synchronizer 6 is connected with the planet carrier 4 to obtain a high reduction ratio and output high torque and low rotating speed. Therefore, the embodiment of the utility model provides a two keep off planet row electric transaxles of coaxial-type for car no longer is single reduction ratio, when the moment of torsion and the rotational speed of driving motor 9 input are unchangeable, both can export high moment of torsion and low rotational speed and can export low moment of torsion and high rotational speed again, can satisfy the driving demand of different road conditions.
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, under the condition of achieving the same reduction ratio, compared with a two-stage planetary gear reduction mechanism, the tower-type planetary gear mechanism is smaller in size.
It should be noted that, in the embodiment of the present invention, the tower-type planetary gear formed by the first planetary gear 2 and the second planetary gear 3 has a complex structure and a high cost.
Those of ordinary skill in the art will understand that: the figures are schematic representations of one embodiment, and the blocks or processes 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 embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope 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 sun gear, a first planetary gear, a second planetary gear, a planet carrier, a gear ring, a synchronizer, a differential, a synchronizer gear shifting motor, a driving motor and a shell;
the sun gear, the planet carrier, the gear ring, the differential and the synchronizer are coaxial, the first planetary gear and the second planetary gear are coaxial and are parallel to the axis of the sun gear, and the sun gear, the first planetary gear, the second planetary gear, the planet carrier, the gear ring, the synchronizer, the differential, the synchronizer gear shifting motor and the driving motor are all arranged in the shell;
a power output shaft of the driving motor is connected with the sun gear, the sun gear is externally meshed with the first planetary gear, the first planetary gear is fixedly connected with the second planetary gear, the second planetary gear is internally meshed with the gear ring, the first planetary gear and the second planetary gear are mounted on the planet carrier, the gear ring is fixedly mounted on the inner wall of the shell, 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 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 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 first planet gears have a pitch circle diameter that is greater than a pitch circle diameter of the second planet gears.
3. The electric transaxle of claim 1 wherein the synchronizer shift motor urges the synchronizer in a predetermined direction into engagement with the 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 carrier when the synchronizer shift motor receives a second control command.
4. The electric transaxle of claim 1 or 3 wherein the synchronizer is splined to the sun gear.
5. The electric drive axle of claim 1 or 3, wherein the synchronizer is splined to the carrier.
6. The electric drive axle of claim 1, wherein the carrier is provided with planet pins having axes parallel to an axis of the sun gear, and the first and second planet gears are respectively mounted to the planet pins through needle bearings.
7. The electric transaxle of claim 1 wherein the first planetary gears are fixedly coupled to the second planetary gears by splines.
8. The electric drive axle of claim 1 wherein said synchronizer is splined to said differential.
9. The electric transaxle of claim 1 wherein the power take-off shaft is splined to the sun gear.
10. The electric transaxle of claim 1 wherein the sun gear is integrally formed with the power take-off shaft.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020722211.7U CN212604505U (en) | 2020-05-06 | 2020-05-06 | Coaxial two-gear planetary row electric drive axle for automobile |
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| CN202020722211.7U CN212604505U (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 |
|---|---|---|---|---|
| CN111439116A (en) * | 2020-05-06 | 2020-07-24 | 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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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111439116A (en) * | 2020-05-06 | 2020-07-24 | 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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