CN113928101A - Single-motor coaxial two-gear electric drive axle - Google Patents
Single-motor coaxial two-gear electric drive axle Download PDFInfo
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- CN113928101A CN113928101A CN202111335715.9A CN202111335715A CN113928101A CN 113928101 A CN113928101 A CN 113928101A CN 202111335715 A CN202111335715 A CN 202111335715A CN 113928101 A CN113928101 A CN 113928101A
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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
- B60K1/00—Arrangement or mounting of electrical propulsion units
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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
- B60K17/043—Transmission unit disposed in on near the vehicle wheel, or between the differential gear unit and the wheel
- B60K17/046—Transmission unit disposed in on near the vehicle wheel, or between the differential gear unit and the wheel with planetary gearing having orbital motion
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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
- B60K17/16—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of differential gearing
- B60K17/165—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of differential gearing provided between independent half axles
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
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- Structure Of Transmissions (AREA)
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Abstract
The utility model provides a two grades of electric drive axles of single motor coaxial-type, includes: a drive motor; the two-gear planetary reduction mechanism comprises a reduction planetary row, a compound planetary row, a clutch and a brake; and a differential including a differential case, a first output half shaft, and a second output half shaft coaxial with the first output half shaft and having an opposite output direction. The speed reduction planet row and the compound planet row share the frame, so that the structure is more compact; the structural design of compound planet row has reduced the drive ratio between the high-low gear, and two gears set up behind the reduction planet row, have improved the economic nature of vehicle and the travelling comfort of shifting.
Description
Technical Field
The invention relates to the field of new energy vehicle transmission, in particular to a single-motor coaxial two-gear electric drive axle.
Background
Electrically driven new energy vehicles are a world trend and a future direction of development. The transaxle is as a common drive mechanism, the wide application is in the transmission field of machinery and vehicle, for the development that adapts to new energy automobile technique, the electric drive axle by driving motor drive has appeared, electric drive axle on the market is mostly one grade electric drive axle, the energy consumption is higher, can't satisfy more complicated variable speed requirement, and two grades of electric drive axle on the market's structure is complicated, built-in structure is compact inadequately, with high costs, and is bulky, be difficult for arranging in limited installation space, and it is relatively poor to shift the travelling comfort.
Therefore, there is a need to develop a single-motor coaxial two-gear electric drive axle to solve one or more of the above-mentioned technical problems.
Disclosure of Invention
To solve at least one of the above technical problems, according to an aspect of the present invention, there is provided a single-motor coaxial two-gear electric drive axle, comprising:
the driving motor is provided with an output shaft, and the output shaft is a first hollow shaft;
the two-gear planetary reduction mechanism comprises a reduction planetary row, a compound planetary row, a clutch and a brake, the reduction planet row comprises a first sun gear, a first planet wheel, a first planet carrier and a first gear ring, the first sun gear is connected with the first hollow shaft, the first gear ring is connected with the drive axle shell, the compound planet row comprises a second sun wheel, a second planet carrier, a third sun wheel, a third planet wheel and a third planet carrier, the second sun wheel is larger than the third sun wheel, the second planet wheel is smaller than the third sun wheel, the first planet carrier, the second planet carrier and the third planet carrier are connected into a whole, the third planet carrier is connected with the first end of the clutch, the first end of the brake is connected with the drive axle housing, and the second end of the brake, the second end of the clutch and the third sun gear are connected to the second hollow shaft; and
differential mechanism, including differential mechanism casing, first output semi-axis and second output semi-axis, the second sun gear passes through the third hollow shaft and connects in the differential mechanism casing, and the third hollow shaft can rotate relatively and overlap and locate in the second hollow shaft and pass the second hollow shaft, first output semi-axis passes the central through-hole back output that sets up on third hollow shaft, first hollow shaft and the driving motor in proper order, second output semi-axis and first output semi-axis are coaxial and output opposite direction.
According to another aspect of the invention, the single-motor coaxial two-gear electric drive axle further comprises a differential lock, one end of the differential lock is connected with the differential shell, and the other end of the differential lock is connected with the second output half shaft.
According to a further aspect of the invention, the second planet wheel meshes with the second sun wheel, the third planet wheel meshes with the third sun wheel, and the second planet wheel and the third planet wheel are arranged in parallel and connected to each other.
According to another aspect of the invention, the differential is a compound planetary differential and further comprises a fourth sun gear, a fourth planet gear, a fifth sun gear and a fifth planet gear, wherein the fourth sun gear is connected with the first output half shaft, the fifth sun gear is connected with the second output half shaft, the fourth planet gear and the fifth planet gear are connected with the differential shell and are mutually externally meshed, the fourth planet gear is meshed with the fourth sun gear, and the fifth planet gear is meshed with the fifth sun gear.
According to another aspect of the invention, the first planet carrier, the second planet carrier and the third planet carrier which are connected into a whole form a common frame of the reduction planet row and the compound planet row, and the clutch and the brake are replaced by the synchronous gear sleeve to switch the connection relation between the third sun gear and the compound planet row frame and the driver shell, so that high-low gear switching is realized.
According to yet another aspect of the invention, the differential lock is a face differential lock or a wet clutch differential lock.
According to yet another aspect of the invention, the brake, the clutch and the third sun gear are arranged in sequence in the direction of the first output half shaft.
According to a further aspect of the invention, the differential, the brake, the clutch, the compound planetary row, the reduction planetary row and the drive motor are arranged in parallel and in sequence in the direction of the first output half shaft.
According to another aspect of the present invention, the first output half shaft is rotatably sleeved in the third hollow shaft and the first hollow shaft.
According to the other aspect of the invention, the third hollow shaft and the second hollow shaft are sleeved outside the first output half shaft in sequence and can rotate relatively.
The invention can obtain one or more of the following technical effects:
1. the original bevel gear structure of the drive axle is simplified, the combination of the speed reduction planet row and the compound planet row is changed, the space requirement of the whole vehicle arrangement is reduced, the independent distributed driving of the front axle and the rear axle of the vehicle is realized, the speed reduction planet row and the compound planet row share the frame, the structure is more compact, and the installation and the maintenance are convenient;
2. the two gears are arranged behind the speed reduction planetary row connected with the motor, and the rotating speed of the motor is reduced after passing through the speed reduction planetary row, so that the gear shifting process of the two gears is smoother, and the comfort is greatly improved;
3. the structural design of the compound planet row reduces the transmission ratio between high and low gears, and further improves the economy and the gear shifting comfort of the vehicle;
4. the structural design of the composite planet row differential mechanism enables the size to be smaller and the axial structure to be more compact;
5. the single-motor coaxial two-gear electric drive axle has the advantages that the whole structure is simplified and more compact, and lower cost and higher performance are realized.
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 single-motor coaxial two-gear electric drive axle according to a preferred embodiment of the present invention.
Detailed Description
The best mode for carrying out the present invention will be described in detail with reference to the accompanying drawings, wherein the detailed description is for the purpose of illustrating the invention in detail, and is not to be construed as limiting the invention, as various changes and modifications can be made therein without departing from the spirit and scope thereof, which are intended to be encompassed within the appended claims.
Example 1
According to a preferred embodiment of the present invention, referring to fig. 1, there is provided a single-motor coaxial two-speed electric drive axle 400, characterized by comprising:
a driving motor 401 having an output shaft, the output shaft being a first hollow shaft;
the two-gear planetary reduction mechanism comprises a reduction planetary row, a compound planetary row, a clutch 410 and a brake 411, the reduction planetary row comprises a first sun wheel 402, a first planet wheel 403, a first planet carrier and a first ring gear 405, the first sun wheel 402 being connected to the first hollow shaft, the first ring gear 405 being connected to the transaxle housing, the compound planet row comprises a second sun gear 406, second planet gears 407, a second planet carrier, a third sun gear 408, third planet gears 409 and a third planet carrier, the second sun gear 406 being larger than the third sun gear 408, the second planet gears 407 being smaller than the third sun gear 408, the first, second and third carriers are integrally connected, the third carrier is connected to a first end of the clutch 410, a first end of the brake 411 is connected with the drive axle housing, and a second end of the brake 411, a second end of the clutch 410 and the third sun gear 408 are connected with the second hollow shaft; and
the differential comprises a differential shell, a first output half shaft 418 and a second output half shaft 417, wherein the second sun gear 406 is connected to the differential shell through a third hollow shaft, the third hollow shaft is sleeved in the second hollow shaft in a relatively rotatable manner and penetrates through the second hollow shaft, the first output half shaft 418 sequentially penetrates through the third hollow shaft, the first hollow shaft and a central through hole arranged on the driving motor 401 and then is output, and the second output half shaft 417 and the first output half shaft 418 are coaxial and have opposite output directions.
Preferably, the first, second and third carriers are connected to a common frame 404 integrally formed as a reduction planet row and a compound planet row.
In accordance with yet another preferred embodiment of the present invention, the one-motor coaxial two-speed electric transaxle 400 further includes a differential lock 416, wherein one end of the differential lock 416 is connected to the differential case and the other end is connected to the second output half shaft 417.
According to a further preferred embodiment of the invention, the second planetary gear 407 is in mesh with the second sun gear 406, the third planetary gear 409 is in mesh with the third sun gear 408, and the second planetary gear 407 and the third planetary gear 409 are arranged in parallel and connected to each other.
According to a further preferred embodiment of the invention, the differential is a compound planetary differential and further comprises a fourth sun gear 412, a fourth planet gear 413, a fifth sun gear 415 and a fifth planet gear 414, the fourth sun gear 412 being connected to a first output half shaft 418, the fifth sun gear 415 being connected to a second output half shaft 417, the fourth planet gear 413 and the fifth planet gear 414 being connected to the differential housing and being in external engagement with each other, the fourth planet gear 413 being in mesh with the fourth sun gear 412 and the fifth planet gear 414 being in mesh with the fifth sun gear 415. Advantageously, the above-described design of the compound planetary differential allows for a smaller volume and a more compact axial configuration.
According to another preferred embodiment of the present invention, the first, second and third planetary carriers connected as a whole form a common frame 404 for the reduction planetary line and the compound planetary line, and the third sun gear 408 is switched to the compound planetary line frame and the driver housing by replacing the clutch 410 and the brake 411 with a synchronous sleeve, thereby realizing the high-low gear switching.
According to a further preferred embodiment of the invention, the differential lock 416 is a face differential lock 416 or a wet clutch 410 differential lock 416.
According to a further preferred embodiment of the invention, said brake 411, clutch 410 and third sun gear 408 are arranged in succession in the direction of the first output half shaft 418.
According to a further preferred embodiment of the invention, said differential, brake 411, clutch 410, compound planetary row, reduction planetary row and driving motor 401 are arranged in parallel and in sequence in the direction of a first output half-shaft 418.
In accordance with yet another preferred embodiment of the present invention, the first output half shaft 418 is relatively rotatably sleeved within the third hollow shaft and the first hollow shaft.
In accordance with a further preferred embodiment of the present invention, the third hollow shaft and the second hollow shaft are rotatably sleeved over the first output half shaft 418 in turn.
There is also provided in accordance with still another preferred embodiment of the present invention a single-motor coaxial two-gear electric drive axle 400, including: differential is arranged to driving motor 401, two grades of planet reduction gears and planet, driving motor 401's output shaft is connected with two grades of planet reduction gears's input, two grades of planet reduction gears's output is connected with the input of planet row differential, the planet is arranged the differential and is included two outputs, left output semi-axis is connected to an output of planet row differential, right output semi-axis is connected to another output, driving motor 401's output shaft is the hollow shaft, the output of right output semi-axis passes the hollow shaft and runs through driving motor 401 and extend to the driving motor 401 other end, left output semi-axis with right output semi-axis sets up in reverse and the axle center is located same straight line.
Advantageously, the planetary gear set differential realizes two speed reduction gears by operating the planetary gear set clutch 410 and the planetary gear set brake 411, further cooperates with the output rotating speed range of the driving motor 401 to realize stepless speed change, and two output half shafts are coaxially arranged, so that the planetary gear set differential has a small volume, can ensure a compact axial structure, can meet the requirement of light weight of a system by coaxial arrangement, and is easy to arrange and install.
Preferably, the differential comprises two output ends which are respectively connected with a left output half shaft and a right output half shaft, so that the requirement of torque distribution of wheels on the left side and the right side when the vehicle runs on different road surfaces can be met, and the differential can be provided with a differential lock 416 so as to meet the running requirement of the vehicle on difficult and complex road surfaces.
Preferably, the driving motor 401 is matched with a two-gear planetary reduction mechanism to form an electric driving system with two gears, so that the energy consumption of the system is reduced, and the economy of the system is improved. The transmission route can be switched through the clutch 410 or the brake 411, so that the speed reducing mechanism realizes two speed reducing gears, the synchronous gear sleeve can be used for switching the connection relation between the planet row frame and the planet row sun gear or between the planet row sun gear and the shell, high-low gear switching is realized, further, the output rotating speed range of the driving motor 401 is matched, stepless speed change is realized, the two output half shafts are mutually associated through the differential mechanism, the original bevel gear structure of the driving axle is simplified in the arrangement of the whole vehicle, the combination of the speed reducing planet row and the composite planet row is changed, the space requirement of the arrangement of the whole vehicle is reduced, and the independent distributed driving of the front axle and the rear axle of the vehicle is realized.
According to another preferred embodiment of the present invention, there is also provided a single-motor coaxial two-gear electric drive axle 400, which is characterized by comprising a drive motor 401, a two-gear planetary reduction mechanism and a planetary row differential, wherein an output shaft of the drive motor 401 is connected with a reduction planetary row sun gear of the two-gear planetary reduction mechanism, an output end of the two-gear planetary reduction mechanism is connected with an input end of the planetary row differential, the planetary row differential comprises two output ends, one output end of the planetary row differential is connected with a left output half shaft, and the other output end of the planetary row differential is connected with a right output half shaft;
the output shaft of the driving motor 401 is a hollow shaft, and the free end of the right output half shaft penetrates through the hollow shaft and penetrates through the driving motor 401 to be arranged at the other end of the driving motor 401; of course, this scheme may also be arranged in a mirror image, with the result that the free end of the left output half shaft passes through the hollow shaft and is disposed to the other end of the drive motor 401 through the drive motor 401;
the right output half shaft and the left output half shaft are arranged in a reverse mode, and the axle centers of the right output half shaft and the left output half shaft are located on the same straight line.
Preferably, two grades of planetary reduction gears include that reduction planet row, compound planet are arranged, clutch 410 and stopper 411, the sun gear and the motor that reduction planet arranged link to each other, the ring gear and the transaxle casing that reduction planet arranged link to each other, the frame that reduction planet arranged and the frame that compound planet was arranged are connected, the frame that compound planet was arranged is connected with compound planet row little sun gear through clutch 410, compound planet row's little sun gear passes through stopper 411 and is connected with the transaxle casing. One end of the clutch 410 is fixedly connected with the small sun gear of the compound planet row, and the other end is fixedly connected with the frame of the compound planet row. One end of the brake 411 is fixedly connected with the small sun gear of the compound planet row, and the other end of the brake is fixedly connected with the drive axle housing. And the large sun gear of the compound planet row is connected with the differential shell.
Preferably, the frame of the compound planet row can also switch the connection relationship between the compound planet row frame and the sun gear of the compound planet row or between the sun gear of the compound planet row and the shell by using a synchronous gear sleeve, so as to realize high-low gear switching.
Preferably, the planet row differential mechanism comprises a compound planet row differential mechanism and a differential lock 416, the compound planet row differential mechanism comprises two sun wheels, two planet wheels and a differential case, the two sun wheels of the compound planet row are respectively connected with a left output half shaft and a right output half shaft, the two planet wheels are respectively meshed with the two sun wheels, and the two planet wheels share one differential case and are simultaneously meshed with each other to form meshed teeth of the compound planet row. The type of differential and differential lock 416 may be selected according to the needs of the user, with one side output of the differential being connected to the left output half shaft and the other side output of the differential being connected to the right output half shaft.
Preferably, two planet wheels of the compound planet row are respectively meshed with the large sun wheel and the small sun wheel, and the two planet wheels of the compound planet row are connected together to form a cone pulley structure.
Advantageously, the two speed reduction gears are realized by the planetary speed reducer, the output speed range of the driving motor 401 is further matched, stepless speed change is realized, and meanwhile, the space of the driving motor 401 is utilized to connect the right output half shaft to the right power output shaft through the center of the motor, so that the overall axial arrangement space of the electric drive axle is saved, and the overall arrangement of the electric drive axle is more convenient. Meanwhile, the compound planet row can reduce the intermediate ratio of two speed ratios, so that the utilization effect of the high-efficiency area of the motor is better, the energy loss of the electric drive axle is reduced, and the economy of the electric drive axle is improved.
According to another preferred embodiment of the present invention, there is also provided a single-motor coaxial two-speed electric drive axle, which is characterized by comprising a drive motor 401, a two-speed planetary reduction mechanism and a planetary row differential, wherein the two-speed planetary reduction mechanism comprises a reduction planetary row comprising a reduction planetary row sun gear 402, a reduction planetary row planet gear 403, a reduction planetary row ring gear 405 and a reduction planetary row frame, a composite planetary row comprising a composite planetary row large sun gear 406, a composite planetary row small planet gear 407, a composite planetary row large planet gear 409 and a composite planetary row small sun gear 408, a reduction planetary row differential, a clutch 410 and a brake 411. The differential comprises a differential sun gear A412, a differential planet gear A413, a differential planet gear B414, a differential sun gear B415 and a differential lock 416;
an output shaft of the driving motor 401 is connected with the reduction planet row sun gear 402, the reduction planet row planet gear 403 is connected with the reduction planet row frame, and the reduction planet row gear ring 405 is connected with a driving axle housing; the composite planet row frame and the reduction planet row are a common frame, namely a reduction planet row frame; the compound planet row big sun gear 406 is meshed with the compound planet row small planet gear 407, the compound planet row small sun gear 408 is meshed with the compound planet row big planet gear 409, and the compound planet row small planet gear 407 and the compound planet row big planet gear 409 are connected into an integral cone pulley structure. The compound planet row small sun gear can be connected with the compound planet row frame through the clutch 410 to form a high gear of the two-gear speed reducing mechanism; the compound planet row small sun gear can also be connected with a driving axle housing through a brake 411 to form a low gear of the two-gear speed reducing mechanism; the two speed reduction mechanism is in neutral when neither clutch 410 nor brake 411 is engaged.
Preferably, the differential case transmits power to the differential planet wheels A413 and B414, and the power can be transmitted to the differential sun wheel A412 and the differential sun wheel B415 through gear engagement respectively, the differential sun wheel A412 is connected with the right output half shaft 418, the differential sun wheel B415 is connected with the left output half shaft 417, the differential planet wheels A413 and B414 are meshed with each other to form a torque loop of the left output half shaft and the right output half shaft, so that the function of the differential is realized.
Preferably, in this embodiment, in order to save the overall arrangement space of the drive axle, the output shaft of the driving motor 401 is a hollow shaft, the free end of the right output half shaft 418 passes through the hollow shaft and extends to the other end of the driving motor through the driving motor, and meanwhile, the left output half shaft 417 and the right output half shaft 418 are arranged in opposite directions and the centers of the two half shafts are located on the same straight line.
Preferably, in this example, the clutch 410 and the brake 411 are respectively combined to form two working gears of the compound planetary row, when the clutch 410 is combined and the brake 411 is separated, the power of the driving motor 401 is transmitted to the compound planetary row frame through the reduction planetary row frame, the small sun gear of the compound planetary row is separated from the driving axle housing, the compound planetary row is in a working state of integral rotation, and the reduction mechanism is in a high gear; when the clutch 410 is combined with the release brake 411, the power of the driving motor 401 is transmitted to the composite planet row frame through the reduction planet row frame, the composite planet row small sun gear 408 is combined with the driving axle housing, the composite planet row is in a reduction working state, and the reduction mechanism is in a low gear; the compound planet row large sun gear 406 is always connected to the differential housing.
Preferably, after the driving motor converts the electric energy into the mechanical energy, the mechanical energy is converted through a two-gear planetary reduction mechanism and then enters a planetary differential mechanism, the planetary differential mechanism is realized through a compound planetary row without a gear ring, and the planetary differential mechanism can realize 1: the torque output is 1, the requirement that the vehicle outputs force uniformly through the left wheel and the right wheel on different road surfaces is met, the differential mechanism of the planet row can be locked through the differential lock 416, and the difficulty escaping requirement of the vehicle on the difficult road surface is met. Power can also be transmitted in a reverse direction in the two-gear electric drive axle system, and the energy recovery through the drive motor 401 improves the energy utilization rate of the vehicle.
The invention can obtain one or more of the following technical effects:
1. the original bevel gear structure of the drive axle is simplified, the combination of the speed reduction planet row and the compound planet row is changed, the space requirement of the whole vehicle arrangement is reduced, the independent distributed driving of the front axle and the rear axle of the vehicle is realized, the speed reduction planet row and the compound planet row share the frame, the structure is more compact, and the installation and the maintenance are convenient;
2. the two gears are arranged behind the speed reduction planetary row connected with the motor, and the rotating speed of the motor is reduced after passing through the speed reduction planetary row, so that the gear shifting process of the two gears is smoother, and the comfort is greatly improved;
3. the structural design of the compound planet row reduces the transmission ratio between high and low gears, and further improves the economy and the gear shifting comfort of the vehicle;
4. the structural design of the composite planet row differential mechanism enables the size to be smaller and the axial structure to be more compact;
5. the single-motor coaxial two-gear electric drive axle has the advantages that the whole structure is simplified and more compact, and lower cost and higher performance are realized.
It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. The utility model provides a two grades of electric drive axles of single motor coaxial-type which characterized in that includes:
the driving motor is provided with an output shaft, and the output shaft is a first hollow shaft;
the two-gear planetary reduction mechanism comprises a reduction planetary row, a compound planetary row, a clutch and a brake, the reduction planet row comprises a first sun gear, a first planet wheel, a first planet carrier and a first gear ring, the first sun gear is connected with the first hollow shaft, the first gear ring is connected with the drive axle shell, the compound planet row comprises a second sun wheel, a second planet carrier, a third sun wheel, a third planet wheel and a third planet carrier, the second sun wheel is larger than the third sun wheel, the second planet wheel is smaller than the third sun wheel, the first planet carrier, the second planet carrier and the third planet carrier are connected into a whole, the third planet carrier is connected with the first end of the clutch, the first end of the brake is connected with the drive axle housing, and the second end of the brake, the second end of the clutch and the third sun gear are connected to the second hollow shaft; and
differential mechanism, including differential mechanism casing, first output semi-axis and second output semi-axis, the second sun gear passes through the third hollow shaft and connects in the differential mechanism casing, and the third hollow shaft can rotate relatively and overlap and locate in the second hollow shaft and pass the second hollow shaft, first output semi-axis passes the central through-hole back output that sets up on third hollow shaft, first hollow shaft and the driving motor in proper order, second output semi-axis and first output semi-axis are coaxial and output opposite direction.
2. The single-motor coaxial two-speed electric drive axle according to claim 1, further comprising a differential lock having one end connected to the differential case and the other end connected to the second output axle shaft.
3. The single-motor coaxial two-speed electric drive axle of claim 1, wherein the second planet gears mesh with a second sun gear, the third planet gears mesh with a third sun gear, and the second planet gears and the third planet gears are arranged in parallel and connected to each other.
4. The single-motor coaxial two-gear electric drive axle according to any one of claims 1 to 3, wherein the differential is a compound planetary row differential and further comprises a fourth sun gear, a fourth planet gear, a fifth sun gear and a fifth planet gear, the fourth sun gear is connected with the first output half shaft, the fifth sun gear is connected with the second output half shaft, the fourth planet gear and the fifth planet gear are connected with the differential housing and are mutually externally meshed, the fourth planet gear is meshed with the fourth sun gear, and the fifth planet gear is meshed with the fifth sun gear.
5. The single-motor coaxial two-gear electric drive axle according to claim 4, wherein the first planet carrier, the second planet carrier and the third planet carrier which are integrally connected form a common frame of the reduction planet row and the compound planet row, and the connection relationship between the third sun gear, the compound planet row frame and the driver housing is switched by replacing the clutch and the brake with synchronous gear sleeves, so that the high-low gear switching is realized.
6. The single-motor coaxial two-speed electric drive axle according to claim 1, wherein the differential lock is an end differential lock or a wet clutch differential lock.
7. The single-motor coaxial two-speed electric transaxle of claim 4 wherein the brake, the clutch, and the third sun gear are sequentially disposed in a direction along the first output half shaft.
8. The single-motor coaxial two-speed electric drive axle according to claim 4, wherein the differential, the brake, the clutch, the compound planetary row, the reduction planetary row and the drive motor are arranged in parallel and in sequence in the direction of the first output half shaft.
9. The single-motor coaxial two-speed electric transaxle of claim 4 wherein the first output half shaft is rotatably journaled within the third hollow shaft and the first hollow shaft.
10. The single-motor coaxial two-speed electric drive axle according to claim 9, wherein the third hollow shaft and the second hollow shaft are rotatably sleeved outside the first output half shaft in sequence.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111335715.9A CN113928101A (en) | 2021-11-11 | 2021-11-11 | Single-motor coaxial two-gear electric drive axle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111335715.9A CN113928101A (en) | 2021-11-11 | 2021-11-11 | Single-motor coaxial two-gear electric drive axle |
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| CN113928101A true CN113928101A (en) | 2022-01-14 |
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| CN202111335715.9A Pending CN113928101A (en) | 2021-11-11 | 2021-11-11 | Single-motor coaxial two-gear electric drive axle |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023222509A1 (en) * | 2022-05-16 | 2023-11-23 | Zf Friedrichshafen Ag | Axle system, drive system and vehicle |
| WO2024044904A1 (en) * | 2022-08-29 | 2024-03-07 | 宁德时代(上海)智能科技有限公司 | Differential device and electric device |
Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
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