CN109318705B - Planetary electric drive transmission device - Google Patents
Planetary electric drive transmission device Download PDFInfo
- Publication number
- CN109318705B CN109318705B CN201811509970.9A CN201811509970A CN109318705B CN 109318705 B CN109318705 B CN 109318705B CN 201811509970 A CN201811509970 A CN 201811509970A CN 109318705 B CN109318705 B CN 109318705B
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- gear
- shaft
- planetary
- planetary gear
- reduction gear
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 41
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 239000004606 Fillers/Extenders Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000009194 climbing Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
Classifications
-
- 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
-
- 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
- B60K17/12—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of electric gearing
Abstract
The invention discloses a planetary electric drive transmission device, which comprises a stepped planetary gear mechanism and is characterized in that: the stepped planetary gear mechanism comprises a sun gear (3), a first planetary gear (5), a second planetary gear (6), an inner gear ring (4) and a planet carrier (7), wherein the sun gear (3) is meshed with the first planetary gear (5), and the first planetary gear (5) and the second planetary gear (6) are connected together to form a stepped planetary gear set and can rotate on the planet carrier (7) and revolve around the sun gear (3) and the inner gear ring (4). The transmission device adopts the stepped planetary gear mechanism to realize gear speed ratio design more easily, and can reduce the performance requirement on a motor and improve the performance of the whole vehicle.
Description
Technical Field
The invention relates to the technical field of vehicle power transmission, in particular to a planetary electric drive transmission device used as a pure electric vehicle and a range-extending electric vehicle.
Background
The electric power system of the automobile has become a development trend, and in recent years, pure electric automobiles and plug-in hybrid electric automobiles are rapidly popularized. The plug-in hybrid electric vehicle occupies a large proportion in the daily use of the pure electric driving mode, the current pure electric driving mode mainly adopts single-speed-ratio driving from the technical scheme, the performance of the whole vehicle depends on the performance of the driving motor, and very high performance requirements are provided for the driving motor. When the vehicle runs in a long-time pure electric mode, the single-speed-ratio driving mode cannot adjust the working point of the motor, and the working efficiency of the system is affected.
The multi-gear electric drive transmission device can improve the performance of the whole vehicle, optimize the working range of a drive motor, reduce the consumption of a battery and become the main development direction of the electric drive transmission device.
Disclosure of Invention
The invention aims to provide a planetary electric drive transmission device which can meet the requirements of vehicle speed and dynamic property in a pure electric mode, can be widely applied to a pure electric system, a plug-in hybrid power system and a range-extending power system, and can finish the endurance mileage by means of an engine when the electric quantity of a battery is insufficient.
In order to achieve the aim of the invention, the following technical scheme is provided:
a planetary electric drive transmission, characterized in that: the planetary gear mechanism comprises a sun gear, a first planetary gear, a second planetary gear, an annular gear and a planet carrier, wherein the sun gear is meshed with the first planetary gear, the first planetary gear and the second planetary gear are connected together to form a stepped planetary gear set, the stepped planetary gear set can rotate on the planet carrier and revolve around the sun gear and the annular gear, the second planetary gear is meshed with the annular gear, a plurality of stepped planetary gear sets are arranged on the circumference of the planet carrier, the sun gear is arranged on a second shaft, a first brake is arranged between the second shaft and a transmission device shell, the second shaft is locked to be at zero rotation speed when the first brake is closed, the annular gear is arranged on the first shaft, the first shaft is simultaneously connected with a rotor of a driving motor, and the planet carrier is used as a power output shaft.
For a longitudinally-arranged rear-drive vehicle, the planet carrier can be directly connected with a flange of the main speed reducer of the whole vehicle or connected with a speed reducing mechanism with a fixed speed ratio and then connected with the flange of the main speed reducer of the whole vehicle.
For a transverse front-drive vehicle, a reduction gear is arranged on a planet carrier, power is transmitted to a differential mechanism through the reduction gear, and then the vehicle is driven to run through a half shaft. The reduction gear adopts two-stage reduction, wherein a small reduction gear on the planet carrier is meshed with a large reduction gear on a gear coupling to form first-stage reduction; the small reduction gear on the gear coupling is meshed with the main reduction gear of the differential mechanism, so that the second-stage reduction is formed.
The first brake can be a friction plate brake or a mechanical mechanism with a rotation locking function, a first clutch is arranged between the first shaft and the second shaft, the first clutch adopts the friction plate clutch mechanism, and when the first clutch is closed, the first shaft and the second shaft operate at the same rotation speed. The first clutch enables an overall rotation of the planetary gear mechanism, but may also be arranged between the sun gear and the planet carrier or between the ring gear and the planet carrier.
When the electric vehicle is driven by the pure electric vehicle, the first brake is closed, the first clutch is opened, the gear ratio is designed to obtain large driving torque at the moment and is used for accelerating starting and climbing working conditions, and the gear is in a first gear pure electric mode. And as the speed of the vehicle increases, the rotation speed of the driving motor increases, the first brake is opened, the first clutch is closed, the planetary gear mechanism integrally rotates at the moment, and no meshing motion exists among all elements, so that the second gear pure electric mode is defined.
A first reduction gear is fixedly arranged on the first shaft, a third reduction gear is arranged on the transmission shaft, the third reduction gear can freely rotate on the transmission shaft, a second reduction gear is arranged between the first reduction gear and the third reduction gear, and the second reduction gear is meshed with the first reduction gear and the third reduction gear at the same time; a second clutch is arranged between the transmission shaft and the reduction gear III. The transmission shaft is used as an input shaft of engine power, a fixed gear on the transmission shaft is meshed with a gear on a generator shaft, and the generator shaft is connected with a rotor of a generator. When the second clutch is closed, the engine and the drive motor can jointly drive the vehicle.
Advantageous effects
The planetary electric drive transmission device provided by the invention adopts the stepped planetary gear mechanism as the transmission device, and has the advantages of large transmission ratio design range, compact structure and the like. And when the vehicle runs at a high speed, the planetary gear mechanism integrally rotates, so that the transmission efficiency is high, and the gear noise risk is reduced. The power system can simultaneously give consideration to the running requirements of low speed, large torque and high vehicle speed, reduce the performance requirement of the motor, and simultaneously is beneficial to improving the efficiency of the power system and prolonging the running mileage. The transmission device is a platform technical scheme and can be also used for an extended-range electric system and a series-parallel hybrid system.
Drawings
FIG. 1 is a schematic diagram of a two-gear electric-only system scheme in an embodiment of the invention
FIG. 2 is a schematic diagram of an extended range electric system in an embodiment of the invention
FIG. 3 is a schematic diagram of a series-parallel hybrid system scheme in an embodiment of the invention
Detailed Description
The invention is described in further detail below with reference to the drawings and examples.
Example 1
As shown in fig. 1, a planetary electric drive transmission includes a drive motor TM, a stepped planetary gear mechanism, a reduction gear, a differential, a clutch, and a brake element.
The stepped planetary gear mechanism comprises a sun gear 3, a first planetary gear 5, a second planetary gear 6, an annular gear 4 and a planet carrier 7, wherein the sun gear 3 is meshed with the first planetary gear 5. The first planetary gears 5 and the second planetary gears 6 are connected together to form a stepped planetary gear set, the stepped planetary gear set can rotate on the planet carrier 7 and revolve around the sun gear 3 and the annular gear 4, the second planetary gears 6 are meshed with the annular gear 4, and a plurality of stepped planetary gear sets are arranged on the circumference of the planet carrier 7. The sun gear 3 is mounted on the second shaft 2, while a first brake B1 is arranged between the second shaft 2 and the transmission housing 0, the second shaft 2 will be locked to zero rotational speed when the first brake B1 is closed, the first brake B1 adopts a one-way clutch mechanism with a rotational speed limiting function, and the rotational direction of the second shaft 2 is limited under the control of an operating mechanism. The ring gear 4 is mounted on the first shaft 1, the first shaft 1 is simultaneously connected with the rotor 14 of the drive motor TM, and the planet carrier 7 serves as a power output shaft. The stator 15 of the drive motor TM is fixed to the transmission housing. A small reduction gear 8 is arranged on the planet carrier 7 and meshed with a large reduction gear 9 on a gear coupling 11 to form first-stage reduction; the small reduction gear 10 on the gear coupling 11 is meshed with the main reduction gear 12 of the differential to form a second reduction stage. The power is transmitted to the differential 25 via the two-stage reduction gears and drives the vehicle via the axle shafts 13.
A first clutch C1 is arranged between the first shaft 1 and the second shaft 2, the first clutch C1 adopts a friction plate type clutch mechanism, and when the first clutch C1 is closed, the first shaft 1 and the second shaft 2 run at the same rotating speed.
The control logic relationship between each operating mode and the shift element is shown in the table below.
| Mode of operation | B1 | C1 |
| EV-1 | ● | 〇 |
| EV-2 | 〇 | ● |
Note that: and an open state; ● -a closed state.
At low vehicle speeds, the first brake B1 alone is closed, and the sun gear 3 is locked to zero rotational speed as the first gear electric-only mode EV-1. At the moment, the first gear ratio is as follows,
i PG ＝(Z 4 /Z 6 )*(Z 5 /Z 3 )
i 1 ＝(i PG +1)/i PG
wherein Z is 4 For the number of teeth of the inner gear ring, Z 5 For the number of teeth of the first planetary gear, Z 6 Second planetary gear teeth number Z 3 For the number of teeth of the sun gear, i PG Speed ratio of planetary gear mechanism, i 1 Is a first gear ratio.
When the vehicle speed increases, the rotation speed of the driving motor TM increases, the first brake B1 is opened, the first clutch C1 is closed, at the moment, all elements of the planetary gear mechanism integrally rotate, and all elements do not relatively mesh with each other to operate, so that the planetary gear mechanism is used as a second gear pure electric mode EV-2.
Example 2
The range extender unit is added on the basis of the embodiment 1 to form a range extender electric driving system. The range extender driving unit comprises an engine ICE, a generator ISG and a transmission mechanism, wherein the engine ICE is connected with a transmission shaft 21 through a flywheel damper FW, a fixed gear 19 is arranged on the transmission shaft 21, the fixed gear 19 is meshed with a gear 20 arranged on a generator shaft 22, the generator shaft 22 is connected with a rotor 23 of the generator ISG, and a stator 24 of the generator ISG is fixed on a transmission device shell. The fixed gear 19 and the gear 20 are used for improving the rotation speed of the generator ISG and improving the working efficiency of the generator ISG.
When the battery is full, the driving motor TM drives the vehicle in a two-gear electric-only mode, where the engine ICE and the generator ISG do not participate in operation. When the battery power is low, the engine starts to drive the generator ISG to generate electricity, and provides electric energy for the battery or the driving motor TM, and the engine is equivalent to a series working mode at the moment and does not directly participate in driving, so that the engine can work in a stable state to only drive the generator ISG to generate electricity.
Example 3
The reduction gear and clutch unit which directly participates in driving of the engine is added on the basis of the embodiment 2, and the engine ICE can directly drive the vehicle under certain working conditions, and the scheme structure is shown in fig. 3.
The first reduction gear 16 is fixedly arranged on the first shaft 1, the third reduction gear 18 is arranged on the transmission shaft 21, the third reduction gear 18 can freely rotate on the transmission shaft 21, the second reduction gear 17 is arranged between the first reduction gear 16 and the third reduction gear 18, and the second reduction gear 17 is meshed with the first reduction gear 16 and the third reduction gear 18 at the same time. A second clutch C2 is arranged between the drive shaft 21 and the reduction gear three 18.
Besides realizing a two-gear pure electric mode and a series connection working mode, the transmission device can work in a low oil consumption area by the engine ICE when the vehicle speed is relatively high, the second clutch C2 is closed, and engine power is transmitted to the first shaft 1 through the reduction gear III 18, the reduction gear II 17 and the reduction gear I16 to drive the vehicle to run according to the two-gear mode. The control logic relationship between each operating mode and the shift element is shown in the table below.
| Mode of operation | B1 | C1 | C2 |
| EV-1 | ● | 〇 | 〇 |
| EV-2 | 〇 | ● | 〇 |
| Tandem-1 | ● | 〇 | 〇 |
| Tandem-2 | 〇 | ● | 〇 |
| Parallel-1 | ● | 〇 | ● |
| Parallel-2 | 〇 | ● | ● |
Note that: (open state +%) closed state
Claims (4)
1. The utility model provides a planetary electric drive transmission, it includes step planet row mechanism, its characterized in that: the stepped planetary gear mechanism comprises a sun gear (3), a first planetary gear (5), a second planetary gear (6), an inner gear ring (4) and a planet carrier (7), wherein the sun gear (3) is meshed with the first planetary gear (5), the first planetary gear (5) and the second planetary gear (6) are connected together to form a stepped planetary gear set, the stepped planetary gear set can rotate on the planet carrier (7) and revolve around the sun gear (3) and the inner gear ring (4), the second planetary gear (6) is meshed with the inner gear ring (4), a plurality of stepped planetary gear sets are arranged on the circumference of the planet carrier (7), the sun gear (3) is arranged on a second shaft (2), a first brake (B1) is arranged between the second shaft (2) and a transmission device shell (0), the second shaft (2) is locked to be at zero rotation speed when the first brake (B1) is closed, the inner gear ring (4) is arranged on the first shaft (1), and the first shaft (1) is connected with the planet carrier (14) as a power output shaft.
2. A planetary electric drive transmission as claimed in claim 1, characterized in that: a first clutch (C1) is arranged between the first shaft (1) and the second shaft (2), and the first clutch (C1) can also be arranged between the sun gear (3) and the planet carrier (7) or between the ring gear (4) and the planet carrier (7).
3. A planetary electric drive transmission as claimed in claim 1, characterized in that: the first brake (B1) is a friction plate type brake or a one-way clutch with a rotating speed locking function.
4. A planetary electric drive transmission according to claim 1 or 2, characterized in that: the novel electric generator is characterized in that a first reduction gear (16) is fixedly installed on the first shaft (1), a third reduction gear (18) is placed on the transmission shaft (21), the third reduction gear (18) can rotate freely on the transmission shaft (21), a second reduction gear (17) is placed between the first reduction gear (16) and the third reduction gear (18), the second reduction gear (17) is meshed with the first reduction gear (16) and the third reduction gear (18) at the same time, a second clutch (C2) is arranged between the transmission shaft (21) and the third reduction gear (18), the transmission shaft (21) is used as an input shaft of engine power, a fixed gear (19) on the transmission shaft (21) is meshed with a gear (20) on a generator shaft (22), and the generator shaft (22) is connected with a rotor (23) of an electric generator (ISG).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811509970.9A CN109318705B (en) | 2018-12-11 | 2018-12-11 | Planetary electric drive transmission device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811509970.9A CN109318705B (en) | 2018-12-11 | 2018-12-11 | Planetary electric drive transmission device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109318705A CN109318705A (en) | 2019-02-12 |
| CN109318705B true CN109318705B (en) | 2024-02-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811509970.9A Active CN109318705B (en) | 2018-12-11 | 2018-12-11 | Planetary electric drive transmission device |
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| Country | Link |
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| CN (1) | CN109318705B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006111143A (en) * | 2004-10-14 | 2006-04-27 | Toyota Motor Corp | Hybrid driving device |
| CN104279279A (en) * | 2013-07-01 | 2015-01-14 | 现代自动车株式会社 | Power transmission system of hybrid electric vehicle |
| CN104661846A (en) * | 2012-09-21 | 2015-05-27 | 丰田自动车株式会社 | Hybrid vehicle drive apparatus |
| CN106494215A (en) * | 2016-10-21 | 2017-03-15 | 广州市新域动力技术有限公司 | Multi-mode composite planet hybrid power assembly |
| CN209666839U (en) * | 2018-12-11 | 2019-11-22 | 王延芸 | A kind of planetary electric drive transmission device |
-
2018
- 2018-12-11 CN CN201811509970.9A patent/CN109318705B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006111143A (en) * | 2004-10-14 | 2006-04-27 | Toyota Motor Corp | Hybrid driving device |
| CN104661846A (en) * | 2012-09-21 | 2015-05-27 | 丰田自动车株式会社 | Hybrid vehicle drive apparatus |
| CN104279279A (en) * | 2013-07-01 | 2015-01-14 | 现代自动车株式会社 | Power transmission system of hybrid electric vehicle |
| CN106494215A (en) * | 2016-10-21 | 2017-03-15 | 广州市新域动力技术有限公司 | Multi-mode composite planet hybrid power assembly |
| CN209666839U (en) * | 2018-12-11 | 2019-11-22 | 王延芸 | A kind of planetary electric drive transmission device |
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| CN109318705A (en) | 2019-02-12 |
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Effective date of registration: 20190409 Address after: Room 301, No. 17, Lane 20, Anyong Road, Jiading District, Shanghai, 201800 Applicant after: Wang Yanyun Address before: Room 301, Building 20, Lane 17, Anyong Road, Anting Town, Jiading District, Shanghai, 201800 Applicant before: SHANGHAI HANLAO AUTOMOBILE TECHNOLOGY Co.,Ltd. |
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