CN114435099A - Vehicle and electric drive system thereof - Google Patents
Vehicle and electric drive system thereof Download PDFInfo
- Publication number
- CN114435099A CN114435099A CN202210066197.3A CN202210066197A CN114435099A CN 114435099 A CN114435099 A CN 114435099A CN 202210066197 A CN202210066197 A CN 202210066197A CN 114435099 A CN114435099 A CN 114435099A
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- drive motor
- gear
- brake
- transmission
- drive system
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- 230000005540 biological transmission Effects 0.000 claims abstract description 64
- 230000007246 mechanism Effects 0.000 claims abstract description 25
- 150000001875 compounds Chemical class 0.000 claims description 7
- 230000008859 change Effects 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 5
- 230000008569 process Effects 0.000 abstract description 5
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 230000036461 convulsion Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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Classifications
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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
- B60K17/02—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of clutch
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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
- B60K17/06—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of change-speed gearing
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Structure Of Transmissions (AREA)
Abstract
The invention relates to the field of vehicles and discloses a vehicle and an electric drive system thereof, wherein the drive system comprises a first drive motor (1), a second drive motor (2) and a transmission mechanism in transmission connection with a half shaft (8), the transmission mechanism is in transmission connection with a power output shaft of the first drive motor (1) through a first transmission path provided with a clutch (4) and a first brake (5), and is in transmission connection with a power output shaft of the second drive motor (2) through a second transmission path provided with a second brake (6). The electric drive system can be switched to output drive power by the first drive motor and/or the second drive motor by changing the braking states of the first brake and the second brake, and smooth switching of different gears is realized by the clutch in the switching process, so that pause and frustration caused by the change of the meshing state of the gears are avoided, and the gear shifting experience of a user is improved.
Description
Technical Field
The present invention relates to the field of vehicles, and in particular to an electric drive system for a vehicle. On this basis, the invention also relates to a vehicle with the electric drive system.
Background
In a vehicle, power generated by a drive device is generally transmitted to half shafts and wheels by a transmission mechanism including a transmission to realize variable speed running of the vehicle by a change in a gear ratio of the transmission. Typically, the transmission adopts synchronous ware gearshift to realize keeping off the position and switching, has the long, big scheduling problem of shifting impact of shifting of time, leads to shifting smoothly inadequately, and the user has obvious pause and frustrate in the process of shifting gears.
Disclosure of Invention
The invention aims to solve the problem of unsmooth gear shifting of a vehicle in the prior art, and provides an electric driving system which can effectively improve gear shifting smoothness and improve gear shifting experience of a user.
In order to achieve the above object, an aspect of the present invention provides an electric drive system including a first drive motor, a second drive motor, and a transmission mechanism drivingly connected to a half shaft, the transmission mechanism being drivingly connected to a power output shaft of the first drive motor through a first transmission path provided with a clutch and a first brake, and drivingly connected to a power output shaft of the second drive motor through a second transmission path provided with a second brake.
Preferably, the first brake is disposed at a portion of the first transmission path closer to the transmission mechanism than the clutch.
Preferably, the transmission mechanism comprises a compound planetary line including a fixedly disposed first ring gear, first planetary gears pivotally mounted on a first carrier and engaged with the first ring gear, a first sun gear connected to the first transmission path and engaged with the first planetary gears, a second sun gear connected to the second transmission path, and second planetary gears engaged with the first planetary gears and the second sun gear at the same time.
Preferably, the transmission mechanism includes a third sun gear provided on the first carrier, a third planetary gear pivotally mounted to the second carrier and engaged with the third sun gear, and a second ring gear fixedly provided to enable the third planetary gear to run around the third sun gear.
Preferably, the transmission mechanism comprises a differential drivingly connected between the second carrier and the axle shaft.
Preferably, the first drive motor is arranged coaxially with the second drive motor.
Preferably, the first drive motor and the second drive motor are arranged on the half-shaft.
Preferably, the power of the first driving motor is greater than the power of the second driving motor.
A second aspect of the invention provides a vehicle comprising an electric drive system as described above.
Through the technical scheme, the electric drive system can be switched to output drive power by the first drive motor and/or the second drive motor by changing the braking states of the first brake and the second brake, and smooth switching of different gears is realized by the clutch in the switching process, so that the jerking feeling caused by the change of the meshing state of the gears is avoided, and the gear shifting experience of a user is improved.
Drawings
FIG. 1 is a schematic diagram of an electric drive system in accordance with a preferred embodiment of the present invention.
Description of the reference numerals
1-a first drive motor; 2-a second drive motor; 3-compound planet row; 4-a clutch; 5-a first brake; 6-a second brake; 7-a differential; 8-half shaft;
r1 — first ring gear; PC 1-first planet carrier; p1 — first planetary gear; s1 — a first sun gear; s2 — a second sun gear; p2-second planetary gear; s3 — a third sun gear; PC 2-second planet carrier; p3-third planetary gear; r2-second ring gear.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
Referring to fig. 1, an electric drive system according to a preferred embodiment of the present invention includes a first drive motor 1 and a second drive motor 2 as drive devices, and the first drive motor 1 and the second drive motor 2 can be respectively or simultaneously connected to an axle shaft 8 through a transmission mechanism described later to drive the axle shaft 8 and wheels at the ends of the axle shaft to rotate, thereby realizing vehicle running.
The electric drive system comprises a transmission, such as the compound planetary row 3, the differential 7, etc., as described in detail below. The transmission mechanism may have one or more power input terminals, such as a first sun gear S1 and a second sun gear S2 described later, for transmitting power output shafts connected to the first drive motor 1 and the second drive motor 2, respectively. Wherein, a clutch 4 and a first brake 5 are arranged on a first transmission path from the first driving motor 1 to the transmission mechanism; a second brake 6 is arranged on a second transmission path from the second drive motor 2 to the transmission.
Therefore, the electric drive system can be switched to output drive power by the first drive motor 1 and/or the second drive motor 2 by changing the braking states of the first brake 5 and the second brake 6, and smooth switching of different gears is realized by the clutch 4 in the switching process, so that the jerking feeling caused by the change of the meshing state of the gears is avoided, and the gear shifting experience of a user is improved. Specifically, when the second brake 6 is engaged, the second drive motor 2 cannot output power to the transmission mechanism, and the power output by the first drive motor 1 is transmitted to the transmission mechanism through the clutch 4 (and the first transmission path including the clutch 4), whereby the half shafts are driven to rotate by the first drive motor 1; when the first brake 5 is engaged, the first drive motor 1 cannot output power to the transmission mechanism, and the power output by the second drive motor 2 is transmitted to the transmission mechanism through the second transmission path, whereby the half shaft is driven to rotate by the second drive motor 2; when the first brake 5 and the second brake 6 are not engaged, the half shafts are driven to rotate by the first driving motor 1 and the second driving motor 2, so that the torque and the power can be larger, and the acceleration performance can be better met. Thus, by setting the power from the first drive motor 1 and the second drive motor 2, different transmission ratios of the transmission mechanism, etc., gear shifting can be achieved by changing the power source.
In the process, the clutch 4 can be firstly utilized to disconnect the transmission connection between the first driving motor 1 and the transmission mechanism, so that when the driving of the first driving motor 1 is changed into the driving of the second driving motor 2 by changing the braking states of the first brake 5 and the second brake 6, or the driving of the second driving motor 2 is changed into the driving of the first driving motor 1, the switched power can be synchronized with the current running state of the transmission mechanism through the clutch 4, so that the gears can be switched smoothly, the jerk caused by the change of the gear meshing state can be avoided, and the gear shifting experience of a user is improved.
Under different driving states, the braking action of the first brake 5 and the second brake 6 can also prevent the power transmitted to the transmission mechanism from being reversely transmitted to the driving device corresponding to the braked transmission path, and the power output to the half shaft 8 is ensured. Through setting up first driving motor 1 and second driving motor 2, can provide double dynamical drive when needing, satisfy vehicle power demand.
Since the clutch 4 is in the normally engaged state, in order to avoid unnecessary force transmission at the clutch 4 when driven only by the second drive motor 2, the first brake 5 may be disposed at a portion closer to the transmission mechanism than the clutch 4. Therefore, the power output by the second driving motor 2 is cut off at the first brake 5, and the clutch 4 is in a static state, which is beneficial to ensuring the service life.
The aforementioned transmission mechanism may be provided in a variety of suitable configurations. In the illustrated preferred embodiment, the transmission mechanism includes a compound planetary row 3, and the compound planetary row 3 includes a fixedly disposed first ring gear R1, first planetary gears P1 pivotally mounted on a first carrier PC1 and engaged with the first ring gear R1, first sun gears S1 connected to the first transmission path and engaged with the first planetary gears P1, second sun gears S2 connected to the second transmission path, and second planetary gears P2 engaged with both the first planetary gears P1 and the second sun gears S2. The first drive motor 1 and the second drive motor 2 can thus have the same type and power, and the gear shifting can be realized by different transmission ratios between the gears in the compound planetary gear set 3.
For example, it is assumed that the state driven by the first drive motor 1 is first gear and the state driven by the second drive motor 2 is second gear. In the first gear, the power output by the first driving motor 1 is transmitted to the first sun gear S1 through the first transmission path, and then transmitted backward through the first planetary gear P1 and the first planet carrier PC1 in sequence; in the second gear, the power output from the second drive motor 2 is transmitted to the second sun gear S2 through the second transmission path, and then transmitted to the rear through the second planetary gear P2, the first planetary gear P1, and the first carrier PC1 in this order. Since the gear ratio from the first sun gear S1 to the first planet carrier PC1 is different from the gear ratio from the second sun gear S2 to the first planet carrier PC1, by selecting one of the first drive motor 1 and the second drive motor 2 for driving, it is possible to realize different gear driving without selecting a different type of drive motor, and the manufacturing cost is reduced. In other embodiments, the first drive motor 1 and the second drive motor 2 may also have different powers, for example, the first drive motor 1 may have a relatively large power.
Further, the transmission mechanism may further include a third sun gear S3 provided on the first planet carrier PC1, a third planetary gear P3 pivotally mounted to the second planet carrier PC2 and engaged with the third sun gear S3, and a second ring gear R2 fixedly provided to enable the third planetary gear P3 to orbit around the third sun gear S3. Therefore, the rotating speed of the transmission path from the third sun gear S3 to the second planet carrier PC2 can be reduced, the effect of a speed reducer is achieved, and the power requirement of vehicle running is met.
Further, a differential 7 may be provided between the second planet carrier PC2 and the axle shaft 8 to allow differential rotation of the left and right wheels to meet the requirements for cornering and rough road running.
In the electric drive system described above, the first drive motor 1 and the second drive motor 2 may be arranged coaxially, e.g. on the half-shafts 8, thereby facilitating a compact arrangement, leaving more driving space for the vehicle design.
On the basis, the invention also provides a vehicle with the electric drive system.
The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, numerous simple modifications can be made to the technical solution of the invention, including combinations of the individual specific technical features in any suitable way. The invention is not described in detail in order to avoid unnecessary repetition. Such simple modifications and combinations should be considered within the scope of the present disclosure as well.
Claims (9)
1. An electric drive system, characterized in that it comprises a first drive motor (1), a second drive motor (2) and a transmission in driving connection with a half shaft (8), which transmission is in driving connection with the power take-off shaft of the first drive motor (1) via a first transmission path provided with a clutch (4) and a first brake (5) and in driving connection with the power take-off shaft of the second drive motor (2) via a second transmission path provided with a second brake (6).
2. An electric drive system according to claim 1, characterized in that the first brake (5) is arranged in a part of the first transmission path that is closer to the transmission mechanism than the clutch (4).
3. An electric drive system according to claim 1, characterized in that the transmission comprises a compound planetary line (3), which compound planetary line (3) comprises a fixedly arranged first annulus gear (R1), a first planetary gear (P1) pivotally mounted on a first planet carrier (PC1) and engaging with the first annulus gear (R1), a first sun gear (S1) connected to the first transmission path and engaging with the first planetary gear (P1), a second sun gear (S2) connected to the second transmission path and a second planetary gear (P2) engaging with both the first planetary gear (P1) and the second sun gear (S2).
4. An electric drive system according to claim 3, characterised in that the transmission comprises a third sun gear (S3) arranged on the first planet carrier (PC1), a third planet gear (P3) pivotally mounted on the second planet carrier (PC2) and engaging with the third sun gear (S3), a second annulus gear (R2) fixedly arranged to enable the third planet gear (P3) to orbit the third sun gear (S3).
5. The electric drive system according to claim 4, characterized in that the transmission comprises a differential (7) drivingly connected between the second planet carrier (PC2) and the half-shaft (8).
6. Electric drive system according to claim 1, characterized in that the first drive motor (1) is arranged coaxially with the second drive motor (2).
7. The electric drive system according to claim 6, characterized in that the first drive motor (1) and the second drive motor (2) are arranged on the half shaft (8).
8. Electric drive system according to claim 1, characterized in that the power of the first drive motor (1) is greater than the power of the second drive motor (2).
9. A vehicle, characterized in that the vehicle comprises an electric drive system according to any one of claims 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210066197.3A CN114435099A (en) | 2022-01-20 | 2022-01-20 | Vehicle and electric drive system thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210066197.3A CN114435099A (en) | 2022-01-20 | 2022-01-20 | Vehicle and electric drive system thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114435099A true CN114435099A (en) | 2022-05-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210066197.3A Pending CN114435099A (en) | 2022-01-20 | 2022-01-20 | Vehicle and electric drive system thereof |
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| Country | Link |
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| CN (1) | CN114435099A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006168587A (en) * | 2004-12-16 | 2006-06-29 | Toyota Motor Corp | Vehicular drive system |
| CN103153737A (en) * | 2010-10-14 | 2013-06-12 | 丰田自动车株式会社 | Control device for vehicle driving system |
| US20180304745A1 (en) * | 2017-04-21 | 2018-10-25 | Jilin University | Dual-motor coupling drive axle with torque vectoring function |
| CN111828565A (en) * | 2019-04-19 | 2020-10-27 | 舍弗勒技术股份两合公司 | Speed change mechanism and bridge drive system |
| JP2021085446A (en) * | 2019-11-27 | 2021-06-03 | 株式会社豊田中央研究所 | Electric vehicle drive device |
| CN213534440U (en) * | 2020-10-28 | 2021-06-25 | 广州汽车集团股份有限公司 | Electric automobile and multi-gear transmission device thereof |
-
2022
- 2022-01-20 CN CN202210066197.3A patent/CN114435099A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006168587A (en) * | 2004-12-16 | 2006-06-29 | Toyota Motor Corp | Vehicular drive system |
| CN103153737A (en) * | 2010-10-14 | 2013-06-12 | 丰田自动车株式会社 | Control device for vehicle driving system |
| US20180304745A1 (en) * | 2017-04-21 | 2018-10-25 | Jilin University | Dual-motor coupling drive axle with torque vectoring function |
| CN111828565A (en) * | 2019-04-19 | 2020-10-27 | 舍弗勒技术股份两合公司 | Speed change mechanism and bridge drive system |
| JP2021085446A (en) * | 2019-11-27 | 2021-06-03 | 株式会社豊田中央研究所 | Electric vehicle drive device |
| CN213534440U (en) * | 2020-10-28 | 2021-06-25 | 广州汽车集团股份有限公司 | Electric automobile and multi-gear transmission device thereof |
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Application publication date: 20220506 |