CN113276600A - Coaxial two-gear electric drive axle - Google Patents
Coaxial two-gear electric drive axle Download PDFInfo
- Publication number
- CN113276600A CN113276600A CN202110730443.6A CN202110730443A CN113276600A CN 113276600 A CN113276600 A CN 113276600A CN 202110730443 A CN202110730443 A CN 202110730443A CN 113276600 A CN113276600 A CN 113276600A
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- Prior art keywords
- planet
- row
- gear
- planetary
- output
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B35/00—Axle units; Parts thereof ; Arrangements for lubrication of axles
- B60B35/12—Torque-transmitting axles
- B60B35/121—Power-transmission from drive shaft to hub
- B60B35/122—Power-transmission from drive shaft to hub using gearings
- B60B35/125—Power-transmission from drive shaft to hub using gearings of the planetary type
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B35/00—Axle units; Parts thereof ; Arrangements for lubrication of axles
- B60B35/12—Torque-transmitting axles
- B60B35/14—Torque-transmitting axles composite or split, e.g. half- axles; Couplings between axle parts or sections
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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
Abstract
The invention belongs to the field of machinery and vehicle transmission, and particularly relates to a coaxial two-gear electric drive axle. Differential mechanism is arranged including driving motor, second grade planet reduction gears and planet, driving motor's output shaft and second grade planet reduction gears's input are connected, second grade planet reduction gears's output and planet row differential mechanism's input are connected, planet row differential mechanism includes two outputs, left output semi-axis is connected to differential mechanism's an output, right output semi-axis is connected to another output, driving motor's output shaft is the hollow shaft, the free end of left output semi-axis passes the hollow shaft and runs through driving motor and set up the driving motor other end, right output semi-axis with left output semi-axis sets up and the axle center is located same straight line in the opposite direction. The two-stage speed reducer is arranged to realize two speed reducing gears, and further, the two speed reducing gears are matched with the output rotating speed range of the driving motor to realize stepless speed change.
Description
Technical Field
The invention belongs to the field of machinery and vehicle transmission, and particularly relates to a coaxial two-gear electric drive axle.
Background
The drive axle is taken as a common transmission mechanism, and the wide application is in the transmission field of machinery and vehicle, for the development that adapts to new energy automobile technique, has appeared by driving motor driven electric drive axle, and the electric drive axle on the market is mostly one grade electric drive axle, and the energy consumption is higher, can't satisfy more complicated variable speed requirement, and two grades of electric drive axles on the market's structure is complicated, and built-in structure is inseparable enough, therefore the volume is often great, is difficult for the installation to arrange.
Disclosure of Invention
In view of this, the present invention provides a coaxial two-gear electric drive axle to solve the problems existing in the prior art, and the specific technical scheme provided by the present invention is as follows:
a coaxial two-gear electric drive axle comprises a drive motor, a secondary planetary reduction mechanism and a planetary row differential mechanism, wherein an output shaft of the drive motor is connected with an input end of the secondary planetary reduction mechanism, an output end of the secondary planetary reduction mechanism is connected with an input end of the planetary row differential mechanism, the planetary row differential mechanism comprises two output ends, one output end of the planetary row differential mechanism is connected with a left output half shaft, and the other output end of the planetary row differential mechanism is connected with a right output half shaft;
the output shaft of the driving motor is a hollow shaft, and the free end of the left output half shaft penetrates through the hollow shaft and penetrates through the driving motor to be arranged at the other end of the driving motor;
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.
Further, second grade planet reduction gears include first planet row, second planet row, clutch and stopper, the first ring gear of first planet row passes through stopper and transaxle shell body coupling, the second ring gear of second planet row is direct and transaxle shell body coupling, the one end of clutch and the first sun gear fixed connection of first planet row, the other end and the first planet carrier fixed connection of first planet row.
Furthermore, a second planet wheel of the second planet row is a cone pulley, the cone pulley comprises a large gear and a small gear, a second sun gear of the second planet row is meshed with the large gear, the small gear is meshed with a second gear ring of the second planet row, and the second gear ring is fixed on the drive axle shell.
Further, the differential mechanism is arranged to the planet includes compound planet row and differential lock, compound planet row includes third planet row and fourth planet row, the third planet wheel that the third planet was arranged with the second planet wheel sharing second planet carrier that the second planet was arranged that the second planet wheel was arranged, the second planet wheel with the third planet wheel sets up respectively in the both sides of second planet carrier and axle center on same straight line, the third planet wheel with the fourth planet wheel of fourth planet row external gearing constitutes the coupling tooth that compound planet was arranged, the third sun gear of third planet row is connected with left output semi-axle, the fourth sun gear of fourth planet row is connected with right output semi-axle, the one end and the second planet carrier fixed connection of the fourth planet carrier of fourth planet row, the other end passes through the differential lock and is connected with right output semi-axle.
Further, the differential lock is an end surface differential lock or a wet clutch differential lock.
Furthermore, the axial width of fourth star gear is greater than the axial width of third star gear, fourth star gear and the third star gear meshing that is located the fourth star gear inboard and with the linkage of fourth sun gear.
Compared with the prior art, the invention has the beneficial effects that:
the two speed reduction gears are realized by arranging the secondary speed reducer, the output rotating speed range of the driving motor is further matched, stepless speed change is realized, and meanwhile, the left output half shaft is connected to the differential mechanism through the motor center by utilizing the space of the driving motor, so that the integral axial arrangement space of the electric drive axle is saved, and the overall arrangement of the electric drive axle is more convenient.
Drawings
Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention.
Fig. 2 is a schematic structural diagram of embodiment 2 of the present invention.
101-drive machine, 102-left output half shaft, 103-right output half shaft, 104-clutch, 105-brake, 106-first sun gear, 107-first planet gear, 108-first ring gear, 109-first planet carrier, 110-second sun gear, 111-second planet gear, 112-second ring gear, 113-second planet carrier, 114-third sun gear, 115-third planet gear, 116-fourth planet gear, 117-fourth sun gear, 118-differential lock, 119-fourth planet carrier.
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.
Example 1
Referring to the description of the drawings, fig. 1 shows a coaxial two-gear electric drive axle, which comprises a drive motor 101, a two-stage planetary reduction mechanism and a planetary row differential, wherein the two-stage planetary reduction mechanism comprises a first planetary row, a second planetary row, a clutch 104 and a brake 105, the first planetary row comprises a first sun gear 106, a first planetary gear 107, a first ring gear 108 and a first planet carrier 109, the second planetary row comprises a second sun gear 110, a second planetary gear 111, a second ring gear 112 and a second planet carrier 113, the planetary row differential comprises a composite planetary row and a differential lock 118, the composite planetary row comprises a third planetary row and a fourth planetary row, the third planetary row comprises a third sun gear 114 and a third planetary gear 115, and the fourth planetary row comprises a fourth sun gear 117, a fourth planetary gear 116 and a fourth planet carrier 119;
an output shaft of the driving motor 101 is connected to the first sun gear 106, the first sun gear 106 is connected to a first carrier 109 through a clutch 104, the first ring gear 108 is connected to the transaxle case through the brake 105, the second ring gear 112 is directly connected to the transaxle case, the second planet gears 111 and the third planet gears 115 share a second planet carrier 113, the second planet gears 111 and the third planet gears 115 are respectively arranged at two sides of the second planet carrier 113 and have the same axis, the third planetary gear 115 and the fourth planetary gear 116 are externally engaged to form coupling teeth of a compound planetary row, the third sun gear 114 is connected to the left output half shaft 102, the fourth sun gear 117 is connected to the right output half shaft 103, one end of the fourth planet carrier 119 is fixedly connected with the second planet carrier 113, and the other end of the fourth planet carrier 119 is connected with the right output half shaft 103 through a differential lock 118.
In this embodiment, in order to save the overall arrangement space of the drive axle, the output shaft of the driving motor 101 is a hollow shaft, the free end of the left output half shaft 102 passes through the hollow shaft and penetrates through the driving motor to be arranged at the other end of the driving motor, and meanwhile, the left output half shaft 102 and the right output half shaft 103 are arranged in opposite directions and the centers of the two half shafts are located on the same straight line.
In the present embodiment, the differential lock 118 is a wet clutch differential lock, and in other embodiments, a normal end surface differential lock may be used.
In the present embodiment, the axial width of the fourth planetary gear 116 is greater than the axial width of the third planetary gear 115, so that the fourth planetary gear 116 can mesh with the third planetary gear 115 located inside the fourth planetary gear, and can indirectly drive the fourth sun gear 117 through the transmission mechanism.
In this example, the clutch 104 and the brake 105 are respectively coupled to form two operating gears of the first planetary gear set, and when the clutch 104 is coupled to the brake 105, the power of the driving motor 101 enters the first planetary gear set through the first sun gear 106, and the rotating speed of the driving motor is reduced and then is output to the second sun gear 110 through the first planetary gear set 109. When the clutch 104 is engaged and the brake 105 is disengaged, the power of the drive motor is directly output to the second sun gear 110 through the first carrier 109. The second gear ring 112 is fixed with the drive axle housing, the second planet row is a planet speed reducing mechanism in a fixed working state, and the second planet wheel 111 is a common planet wheel;
after the driving motor converts the electric energy into the mechanical energy, the mechanical energy enters the planetary gear differential mechanism after being converted by the secondary planetary reduction mechanism, the planetary differential mechanism is realized by a compound planetary gear without a gear ring, and the planetary gear differential mechanism can realize 1 between left and right wheels in a compact space through gear matching change: 1 torque output, satisfies the vehicle and is passing through the unanimous demand of two wheel strength output about the different road surfaces, can arrange the differential mechanism shutting with the planet through differential lock 118, satisfies the stranded demand of getting rid of vehicle on difficult road surface.
Example 2
The only difference between this embodiment and embodiment 1 is that the second planetary gear 111 in this embodiment is a stepped gear composed of a gear with a larger diameter and a gear with a smaller diameter, the second sun gear 110 is engaged with the gear with the larger diameter in the stepped gear, and the gear with the smaller diameter is engaged with the second ring gear 112 fixed on the axle housing.
The above embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements made to the technical solution of the present invention by those skilled in the art without departing from the spirit of the present invention are intended to fall within the scope of the present invention defined by the claims.
Claims (6)
1. A coaxial two-gear electric drive axle is characterized by comprising a drive motor, a secondary planetary reduction mechanism and a planetary row differential mechanism, wherein an output shaft of the drive motor is connected with an input end of the secondary planetary reduction mechanism, an output end of the secondary planetary reduction mechanism is connected with an input end of the planetary row differential mechanism, the planetary row differential mechanism comprises two output ends, one output end of the planetary row differential mechanism is connected with a left output half shaft, and the other output end of the planetary row differential mechanism is connected with a right output half shaft;
the output shaft of the driving motor is a hollow shaft, and the free end of the left output half shaft penetrates through the hollow shaft and penetrates through the driving motor to be arranged at the other end of the driving motor;
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.
2. The coaxial two-speed electric drive axle according to claim 1, wherein the secondary planetary reduction mechanism comprises a first planetary row, a second planetary row, a clutch and a brake, the first ring gear of the first planetary row is connected with the drive axle housing through the brake, the second ring gear of the second planetary row is directly connected with the drive axle housing, one end of the clutch is fixedly connected with the first sun gear of the first planetary row, and the other end of the clutch is fixedly connected with the first planet carrier of the first planetary row.
3. The coaxial two-speed electric drive axle of claim 2, wherein the second planet of the second row is a cone gear comprising a bull gear and a pinion gear, the second sun gear of the second row is engaged with the bull gear, the pinion gear is engaged with the second annulus gear of the second row, and the second annulus gear is fixed to the drive axle housing.
4. The coaxial two-gear electric drive axle according to claim 2, wherein the planet row differential comprises a compound planet row and a differential lock, the compound planet row comprises a third planet row and a fourth planet row, the third planet wheel of the third planet row and the second planet wheel of the second planet row share the second planet carrier of the second planet row, the second planet wheel and the third planet wheel are respectively arranged at two sides of the second planet carrier, the axes of the second planet wheel and the third planet wheel are on the same straight line, the third planet wheel and the fourth planet wheel of the fourth planet row are externally meshed to form coupling teeth of the compound planet row, the third sun wheel of the third planet row is connected with a left output half shaft, the fourth sun wheel of the fourth planet row is connected with a right output half shaft, and one end of the fourth planet carrier of the fourth planet row is fixedly connected with the second planet carrier, the other end is connected with a right output half shaft through a differential lock.
5. The coaxial two-speed electric drive axle according to claim 4, wherein the differential lock is a face differential lock or a wet clutch differential lock.
6. The in-line two-speed electric drive axle of claim 4, wherein the axial width of the fourth planet is greater than the axial width of the third planet, and the fourth planet is meshed with the third planet located inside the fourth planet and is linked with the fourth sun gear.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110730443.6A CN113276600A (en) | 2021-06-29 | 2021-06-29 | Coaxial two-gear electric drive axle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110730443.6A CN113276600A (en) | 2021-06-29 | 2021-06-29 | Coaxial two-gear electric drive axle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113276600A true CN113276600A (en) | 2021-08-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110730443.6A Pending CN113276600A (en) | 2021-06-29 | 2021-06-29 | Coaxial two-gear electric drive axle |
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| Country | Link |
|---|---|
| CN (1) | CN113276600A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113500904A (en) * | 2021-07-22 | 2021-10-15 | 中国北方车辆研究所 | Centralized two-gear electric drive axle |
| CN113928101A (en) * | 2021-11-11 | 2022-01-14 | 江苏华永复合材料有限公司 | Single-motor coaxial two-gear electric drive axle |
| WO2023222509A1 (en) * | 2022-05-16 | 2023-11-23 | Zf Friedrichshafen Ag | Axle system, drive system and vehicle |
| WO2024074311A1 (en) * | 2022-10-06 | 2024-04-11 | Zf Friedrichshafen Ag | Transmission and drive device for a motor vehicle |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205534190U (en) * | 2016-04-26 | 2016-08-31 | 福建工程学院 | Electricelectric motor car integrated form driving system |
| CN206589653U (en) * | 2017-02-28 | 2017-10-27 | 长城汽车股份有限公司 | Drive axle and vehicle |
| CN111439117A (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 |
| US20200324647A1 (en) * | 2019-04-11 | 2020-10-15 | Dana Heavy Vehicle Systems Group, Llc | Electric axle assembly |
| CN111873711A (en) * | 2020-07-03 | 2020-11-03 | 北方汤臣传动科技有限公司 | Compact electric drive axle |
| CN112622522A (en) * | 2021-01-07 | 2021-04-09 | 北京北方车辆新技术孵化器有限公司 | Two-gear coaxial electric drive axle with compact layout |
-
2021
- 2021-06-29 CN CN202110730443.6A patent/CN113276600A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205534190U (en) * | 2016-04-26 | 2016-08-31 | 福建工程学院 | Electricelectric motor car integrated form driving system |
| CN206589653U (en) * | 2017-02-28 | 2017-10-27 | 长城汽车股份有限公司 | Drive axle and vehicle |
| US20200324647A1 (en) * | 2019-04-11 | 2020-10-15 | Dana Heavy Vehicle Systems Group, Llc | Electric axle assembly |
| CN111439117A (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 |
| CN111873711A (en) * | 2020-07-03 | 2020-11-03 | 北方汤臣传动科技有限公司 | Compact electric drive axle |
| CN112622522A (en) * | 2021-01-07 | 2021-04-09 | 北京北方车辆新技术孵化器有限公司 | Two-gear coaxial electric drive axle with compact layout |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113500904A (en) * | 2021-07-22 | 2021-10-15 | 中国北方车辆研究所 | Centralized two-gear electric drive axle |
| CN113928101A (en) * | 2021-11-11 | 2022-01-14 | 江苏华永复合材料有限公司 | Single-motor coaxial two-gear electric drive axle |
| WO2023222509A1 (en) * | 2022-05-16 | 2023-11-23 | Zf Friedrichshafen Ag | Axle system, drive system and vehicle |
| WO2024074311A1 (en) * | 2022-10-06 | 2024-04-11 | Zf Friedrichshafen Ag | Transmission and drive device for a motor vehicle |
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