CN115284849A - Two-gear electric drive axle system - Google Patents
Two-gear electric drive axle system Download PDFInfo
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- CN115284849A CN115284849A CN202210977477.XA CN202210977477A CN115284849A CN 115284849 A CN115284849 A CN 115284849A CN 202210977477 A CN202210977477 A CN 202210977477A CN 115284849 A CN115284849 A CN 115284849A
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- gear
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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
- B60K1/02—Arrangement or mounting of electrical propulsion units comprising more than one electric motor
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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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- Combustion & Propulsion (AREA)
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Abstract
There is provided a two-gear electric drive axle system comprising: a first motor and a second motor; the first driving gear is connected with the first motor; the second driving gear is connected with the second motor; the first intermediate shaft is fixedly connected with a driven gear, a first planet row and intermediate shaft combination teeth in sequence; the second intermediate shaft is coaxially arranged with the first intermediate shaft and is fixedly connected with a synchronous gear sleeve and a second planet row in sequence, and the synchronous gear sleeve can be switched among a first position, a middle position and a second position; the differential is connected with a first output half shaft and a second output half shaft and is connected with a planet carrier of the second planet row; the first wheel side speed reducing mechanism is respectively connected with the first output half shaft and the first wheel; and the second wheel side speed reducing mechanism is respectively connected with the second output half shaft and the second wheel. The two combined teeth are arranged on the same side of the synchronous gear sleeve to realize three-gear switching; the fixed shaft gear and the double planetary rows are in series transmission, so that the functions of large reduction ratio and large torque transmission can be realized.
Description
Technical Field
The invention relates to the field of new energy automobile parts, in particular to a two-gear electric drive axle system.
Background
The development of new energy automobiles is more and more emphasized by the nation. With the rapid development of the electric drive of medium and heavy commercial vehicles, a matched electric drive bridge system has gradually become the mainstream. However, the current electric drive bridge is difficult to meet the requirements of different road conditions on power and vehicle speed, and has the disadvantages of complex structure, low transmission efficiency, heavy weight and high cost.
Therefore, there is a need to develop a two-gear electric drive axle system 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 two-speed drive axle system, comprising:
a first motor and a second motor;
the first driving gear is connected with the first motor;
the second driving gear is connected with a second motor;
the first intermediate shaft is fixedly connected with a driven gear, a first planet row and intermediate shaft combined teeth in sequence;
the second intermediate shaft is coaxially arranged with the first intermediate shaft and is fixedly connected with a synchronous gear sleeve and a second planet row in sequence, and the synchronous gear sleeve can be switched among a first position, a middle position and a second position;
the differential is connected with a first output half shaft and a second output half shaft and is connected with a planet carrier of the second planet row;
the first wheel side speed reducing mechanism is respectively connected with the first output half shaft and the first wheel; and
the second wheel side speed reducing mechanism is respectively connected with a second output half shaft and a second wheel;
the synchronous gear sleeve is connected with the planet carrier of the first planet row when located at the first position, is connected with the intermediate shaft combined gear when located at the second position, and is separated from the planet carrier of the first planet row and the intermediate shaft combined gear when located at the intermediate position.
According to yet another aspect of the invention, the first motor, the second motor and the intermediate shaft are arranged coplanar.
According to another aspect of the invention, the first output half shaft is connected to the first hub reduction mechanism through the second intermediate shaft and the first intermediate shaft in this order.
According to a further aspect of the invention, the first forward gear is achieved when the synchronizing sleeve is switched into the first position, the second forward gear is achieved when the synchronizing sleeve is switched into the second position, and the neutral gear is achieved when the synchronizing sleeve is switched into the intermediate position.
According to a further aspect of the invention, the first planet row and the second planet row each comprise a sun wheel, planet wheels, a ring gear and a planet carrier, the ring gear being connected to the casing.
According to still another aspect of the present invention, each of the first and second wheel reduction mechanisms is composed of a wheel planetary row.
According to another aspect of the invention, the wheel-side planetary row is composed of a sun wheel, planetary wheels, a planetary carrier and a gear ring.
According to a further aspect of the invention, the sun gear of the wheel-side planetary row is connected with the first output half shaft or the second output half shaft.
According to another aspect of the invention, the planet carrier of the wheel-side planetary row is connected with the first wheel or the second wheel.
According to a further aspect of the invention, the ring gear of the wheel-side planetary row is connected to the casing.
The invention can obtain one or more of the following technical effects:
the electric drive bridge has the advantages of simple structure, convenient control and high transmission efficiency;
the requirements of different road conditions on power and vehicle speed can be met, the structure of the electric drive bridge can be simplified, and the weight and the cost of the electric drive bridge can be reduced;
the double-motor composite transmission can reduce the requirement on the size of the gear while transmitting the requirement on large torque;
the combining teeth of the synchronizer are arranged on the same side of the engaging sleeve, so that three-gear switching can be realized;
the fixed shaft gear and the double planetary rows are in series transmission, so that the functions of large reduction ratio and large torque transmission can be realized;
the gear shifter is positioned on the 2-stage reduction planetary gear, power is subjected to speed reduction and torque increase through the 2-stage planetary gear when the gear 1 is shifted, the gear shifter is used for working conditions needing large torque such as vehicle starting and climbing, the power directly transmits the power to the 3-stage planetary gear when the gear 2 is shifted by bypassing the 2-stage planetary gear, and the transmission efficiency of the vehicle can be improved to the maximum degree while the vehicle can obtain high rotating speed.
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 view of a two-speed drive axle system according to a preferred embodiment of the present invention.
FIG. 2 is a schematic representation of the first forward power transmission of a two-speed electric drive axle system in accordance with a preferred embodiment of the present invention.
Fig. 3 is a second forward power transmission schematic of a two-speed electric drive axle system according to a preferred embodiment of the present invention.
Detailed Description
The best mode for carrying out the invention will now be described in detail by way of preferred embodiments with reference to the accompanying drawings, wherein the detailed description is intended to illustrate the invention in detail without limiting the invention thereto, and various changes and modifications can be made without departing from the spirit and scope of the invention as defined by the appended claims.
Example 1
According to a preferred embodiment of the present invention, referring to fig. 1, there is provided a two-gear electric drive axle system characterized by comprising:
a first motor M1 and a second motor M2;
the first driving gear 12 is connected with the first motor M1;
the second driving gear 14 is connected with the second motor M2;
the first intermediate shaft 20 is fixedly connected with a driven gear 15, a first planet row and intermediate shaft combination teeth 21 in sequence;
a second intermediate shaft 38, arranged coaxially with the first intermediate shaft 20 and fixedly connected in turn to a synchronizing sleeve C1 and a second planetary row, the synchronizing sleeve C1 being switchable between a first position, an intermediate position and a second position;
a differential 26 to which a first output half shaft 27 and a second output half shaft 28 are connected and which is connected to the carrier 25 of the second planetary row;
a first wheel reduction mechanism connected to the first output axle shaft 27 and the first wheel, respectively; and
a second wheel reduction mechanism connected to a second output axle shaft 28 and a second wheel, respectively;
the first driving gear 12 and the second driving gear 14 are engaged with the driven gear 15, the synchronous gear sleeve C1 is engaged with the planet carrier 19 of the first planetary row when located at the first position, the synchronous gear sleeve C1 is engaged with the intermediate shaft engaging teeth 21 when located at the second position, and the synchronous gear sleeve C1 is disengaged from the planet carrier 19 of the first planetary row and the intermediate shaft engaging teeth 21 when located at the intermediate position.
According to a preferred embodiment of the present invention, the first electric machine M1, the second electric machine M2 and the intermediate shaft 20 are arranged coplanar.
According to a preferred embodiment of the invention, the first output half shaft 27 is connected to the first hub reduction mechanism through the second intermediate shaft and the first intermediate shaft 20 in sequence.
According to a preferred embodiment of the invention, the first forward gear is achieved when the synchronizing sleeve C1 is switched into the first position, the second forward gear is achieved when the synchronizing sleeve is switched into the second position, and the neutral gear is achieved when the synchronizing sleeve is switched into the intermediate position.
According to a preferred embodiment of the invention, the first planet row and the second planet row each comprise a sun wheel, planet wheels, a ring gear and a planet carrier, the ring gear being connected to the casing. More specifically, the first planetary row includes a first sun gear 16, a first planet gear 17, a first ring gear 18, and a first carrier 19. The second planetary rows each comprise a second sun wheel 22, second planet wheels 23, a second ring wheel 24 and a second planet carrier 25.
According to a preferred embodiment of the present invention, each of the first and second wheel reduction mechanisms is composed of a wheel planetary row.
According to a preferred embodiment of the invention, the wheel-side planetary row consists of a sun wheel, planetary wheels, a planetary carrier and a ring gear. More specifically, the first wheel-side planetary row is composed of a first wheel-side sun gear 33, a first wheel-side planetary gear 34, a first wheel-side planetary carrier 36, and a first wheel-side ring gear 35. The second wheel-side planet row is composed of a second wheel-side sun gear 29, a second wheel-side planet gear 30, a second wheel-side planet carrier 32 and a second wheel-side gear ring 31.
According to a preferred embodiment of the invention, the sun gear of the wheel-side planetary row is connected to the first output half shaft or the second output half shaft.
According to a preferred embodiment of the present invention, the planet carrier of the wheel-side planet row is connected to the first wheel or the second wheel.
According to a preferred embodiment of the invention, the ring gear of the wheel-side row is connected to the casing.
According to the preferred embodiment of the invention, the two-gear electric drive axle system is characterized in that the motors M1 and M2 are arranged on two sides of the half axle in parallel (note: the number of the motors can be N, N is an integer from 1 to 2 to 3 and the like),
a primary driving gear (first driving gear) 12 is connected to the motor M1 through a first motor shaft 11;
a primary drive gear (second drive gear) 14 is connected to the motor M2 through a second motor shaft 13;
a primary driven gear (driven gear) 15, a planet row P1 sun gear 16 and a middle shaft joint tooth 21 are connected to a middle shaft 20;
the synchronous gear sleeve C1 is connected with the sun gear 22 of the planet row P2;
the planet carrier of the planet row P2 is connected with a differential 26;
the wheel edge sun gear 33 is connected with the long half shaft (first output half shaft) 27;
the wheel-side sun gear 29 is connected with a short half shaft (second output half shaft) 28;
the wheel-side planetary carriers 32 and 36 are respectively connected with wheels on two sides;
the planet row P1 gear ring 18, the planet row P2 gear ring 24 and the wheel edge gear rings 31 and 35 are fixed on the box body.
Preferably, the working principle of the present invention is as follows.
As shown in fig. 2, the first forward speed power transmission process is shown:
the first-stage driving gear 12 is connected to the motor M1 through a motor shaft 11, the first-stage driving gear 13 is connected to the motor M2 through a motor shaft 14, the motors M1 and the motors M2 are distributed on two sides of the half shaft 27 in parallel, an included angle between the two motors M1 and M2 relative to the half shaft 27 can be in planar arrangement or V-shaped arrangement according to a certain angle, the first-stage driving gear 12 and the first-stage driving gear 13 are meshed with the first-stage driven gear 15 at the same time, power of the motors M1 and M2 is transmitted to the first-stage driven gear 15, the other stage driven gear 15, the P1 sun gear 16 and the middle shaft joint teeth 21 are connected to the middle shaft 20, and the power is transmitted to the P1 sun gear 16 to achieve first-stage speed reduction.
The P1 gear ring 18 is fixedly arranged on the box body, the P1 sun gear 16 is fixedly arranged on the intermediate shaft 20, the planet row P1 planet gears 17 are arranged on the planet row P1 planet carrier 19, the planet row P1 planet gears 17 can rotate around the planet row P1 planet carrier 19, the intermediate shaft 20 and the planet row P1 planet carrier 19 are both fixedly provided with combined teeth, and the synchronous gear sleeve C1 arranged on the planet row P2 sun gear shaft can be respectively combined with the combined teeth on the intermediate shaft 20 and the planet row P1 planet carrier 19 or can not be combined, namely is in a neutral gear state.
The synchronous gear sleeve C1 is shifted to the left, the C1 is connected with a combined gear on the planet carrier 19 of the planet row P1, the synchronous gear sleeve C1 is connected with the sun gear 22 of the planet row P2, the planet carrier 19 of the planet row P1 and the sun gear 22 of the planet row P2 are connected together, power is transmitted to the sun gear of the planet row P2 from the sun gear 16 of the planet row P1 through the planet carrier 19 of the planet row P1, and second-stage speed reduction is achieved.
The planet row P2 ring gear 24 is fixedly installed on the box body, the planet row P2 planet gear 23 is installed on the planet row P2 planet carrier 25, the planet row P2 planet gear can rotate around the planet row P2 planet carrier, the planet row P2 planet carrier 25 is connected with the differential 26, power is transmitted to the differential 26 from the planet row P2 sun gear through the planet row P2 planet carrier 25, and third-stage speed reduction is achieved.
The differential 26 can distribute power to the long axle shaft 27 and the short axle shaft 28 according to vehicle conditions.
The wheel-side ring gears 31 and 35 are fixedly arranged on the box body respectively, the wheel-side planet gears 30 and 34 are arranged on respective planet carriers 32 and 36 respectively, and the wheel-side planet gears 30 and 34 can rotate around the respective planet carriers 32 and 36 respectively.
The wheel edge sun gear 33 is connected with the long half shaft 27, the wheel edge sun gear 29 is connected with the short half shaft 28, power is transmitted to the wheel edge sun gear 33 and the wheel edge sun gear 29 through the long half shaft 27 and the short half shaft 28 respectively after being distributed by the differential mechanism, the wheel edge planet carriers 32 and 36 are connected with wheels on two sides respectively, and the power is transmitted to the wheels on two sides through the wheel edge sun gear 29 and 33 and the wheel edge planet carriers 32 and 36 to realize fourth-stage speed reduction.
As shown in fig. 3, the second forward speed power transmission process is:
the first-stage driving gear 12 is connected to the motor M1 through a motor shaft 11, the first-stage driving gear 13 is connected to the motor M2 through a motor shaft 14, the first-stage driving gear 12 and the first-stage driving gear 13 are simultaneously meshed with the first-stage driven gear 15, power of the motor M1 and the motor M2 is transmitted to the first-stage driven gear 15, the second-stage driven gear 15, the planet row P1 sun gear 16 and the middle shaft joint teeth 21 are connected to the middle shaft 20, and power is transmitted to the middle shaft joint teeth 21 to achieve first-stage speed reduction.
The synchronous gear sleeve C1 is shifted to the right, the synchronous gear sleeve C1 is connected with the sun gear 22 of the planetary row P2, the intermediate shaft joint gear 21 and the sun gear 22 of the planetary row P2 are connected together, power is transmitted to the sun gear of the planetary row P2 from the intermediate shaft joint gear 21 through the synchronous gear sleeve C1, and direct transmission is achieved without speed change.
The planet carrier 25 of the planet row P2 is connected with the differential 26, and power is transmitted to the differential 26 from the sun gear of the planet row P2 through the planet carrier 25 of the planet row P2, so that the second-stage speed reduction is realized.
The wheel edge sun gear 33 is connected with the long half shaft 27, the wheel edge sun gear 29 is connected with the short half shaft 28, power is transmitted to the wheel edge sun gear 33 and the wheel edge sun gear 29 through the long half shaft 27 and the short half shaft 28 respectively after being distributed by the differential mechanism, the wheel edge planet carriers 32 and 36 are connected with wheels on two sides respectively, and the power is transmitted to the wheels on two sides through the wheel edge sun gear 29 and 33 and the wheel edge planet carriers 32 and 36 to realize third-stage speed reduction.
The power transmission process of the neutral gear is as follows:
the synchronous gear sleeve C1 is shifted to the middle, so that the power can be interrupted in the middle of the two planet rows, and neutral gear is realized.
The power transmission process of the reverse gear is as follows:
the double motors are controlled to rotate reversely, the synchronous gear sleeve C1 is shifted to the left side, the power transmission process is consistent with the first forward gear, the output steering is opposite, and reverse gear is achieved.
The invention can obtain one or more of the following technical effects:
the electric drive bridge has the advantages of simple structure, convenient control and high transmission efficiency;
the requirements of different road conditions on power and vehicle speed can be met, the structure of the electric drive bridge can be simplified, and the weight and the cost of the electric drive bridge can be reduced;
the double-motor composite transmission can reduce the requirement on the size of the gear while transmitting the requirement on large torque;
the combining teeth of the synchronizer are arranged on the same side of the engaging sleeve, so that three-gear switching can be realized;
the fixed shaft gear and the double planetary rows are in series transmission, so that the functions of large reduction ratio and large torque transmission can be realized;
the shifter is positioned on the 2-stage reduction planetary gear, power passes through the 2-stage reduction planetary gear to reduce and increase torque when the gear 1 is shifted, the gear is used for working conditions needing large torque such as vehicle starting and climbing, and the power directly transmits the power to the 3-stage reduction planetary gear by bypassing the 2-stage reduction planetary gear when the gear 2 is shifted, so that the vehicle can obtain high rotating speed and improve transmission efficiency to the maximum extent.
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. A two-gear electric drive axle system, comprising:
a first motor and a second motor;
the first driving gear is connected with the first motor;
the second driving gear is connected with a second motor;
the first intermediate shaft is fixedly connected with a driven gear, a first planet row and intermediate shaft combined teeth in sequence;
the second intermediate shaft is coaxially arranged with the first intermediate shaft and is fixedly connected with a synchronous gear sleeve and a second planet row in sequence, and the synchronous gear sleeve can be switched among a first position, a middle position and a second position;
the differential is connected with a first output half shaft and a second output half shaft and is connected with a planet carrier of the second planet row;
the first wheel side speed reducing mechanism is respectively connected with the first output half shaft and the first wheel; and
the second wheel side speed reducing mechanism is respectively connected with a second output half shaft and a second wheel;
the synchronous gear sleeve is connected with the planet carrier of the first planet row when located at the first position, is connected with the intermediate shaft combined gear when located at the second position, and is separated from the planet carrier of the first planet row and the intermediate shaft combined gear when located at the intermediate position.
2. The two-speed electric drive axle system according to claim 1, wherein the first electric machine, the second electric machine, and the countershaft are disposed in a coplanar arrangement.
3. The two-speed drive axle system according to claim 2, wherein the first output half shaft is connected to the first wheel reduction mechanism sequentially through the second intermediate shaft and the first intermediate shaft.
4. The two-speed electric drive axle system according to claim 3, wherein the synchronizing sleeve gear achieves a first forward gear when shifted to the first position, a second forward gear when shifted to the second position, and a neutral gear when shifted to the neutral position.
5. Two-gear electric drive axle system according to any of claims 1-4, characterized in that the first planetary row and the second planetary row each comprise a sun wheel, planet wheels, a ring gear and a planet carrier, the ring gear being connected to the housing.
6. The two-speed electric drive axle system according to claim 5, wherein the first and second hub reduction mechanisms are each comprised of a hub planetary row.
7. The two-gear electric drive axle system according to claim 6, wherein the wheel-side planetary row is composed of a sun wheel, a planetary carrier and a ring gear.
8. The two-speed electric drive axle system according to claim 7, wherein the sun gear of the wheel-side planetary row is connected to the first output half shaft or the second output half shaft.
9. The two-speed drive axle system according to claim 8, wherein the carrier of the wheel-side planetary row is connected to the first wheel or the second wheel.
10. The two-speed drive axle system according to claim 9, wherein the ring gear of the wheel-side planetary row is connected to the housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210977477.XA CN115284849A (en) | 2022-08-15 | 2022-08-15 | Two-gear electric drive axle system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210977477.XA CN115284849A (en) | 2022-08-15 | 2022-08-15 | Two-gear electric drive axle system |
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| Publication Number | Publication Date |
|---|---|
| CN115284849A true CN115284849A (en) | 2022-11-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210977477.XA Pending CN115284849A (en) | 2022-08-15 | 2022-08-15 | Two-gear electric drive axle system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115972896A (en) * | 2022-11-23 | 2023-04-18 | 江苏华永复合材料有限公司 | Efficient multi-gear electric drive bridge transmission system |
-
2022
- 2022-08-15 CN CN202210977477.XA patent/CN115284849A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115972896A (en) * | 2022-11-23 | 2023-04-18 | 江苏华永复合材料有限公司 | Efficient multi-gear electric drive bridge transmission system |
| CN115972896B (en) * | 2022-11-23 | 2023-10-27 | 江苏华永复合材料有限公司 | Multi-gear electric drive bridge transmission system |
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