CN218702686U - Series-parallel double-planetary-gear power coupling device - Google Patents
Series-parallel double-planetary-gear power coupling device Download PDFInfo
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- CN218702686U CN218702686U CN202223029651.2U CN202223029651U CN218702686U CN 218702686 U CN218702686 U CN 218702686U CN 202223029651 U CN202223029651 U CN 202223029651U CN 218702686 U CN218702686 U CN 218702686U
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Abstract
The utility model provides a series-parallel connection formula double planetary gear power coupling device, include: the device comprises a differential gear train, an engine, a first motor, a second motor and an output mechanism; the differential gear train comprises a first planet wheel, a first planet carrier, a first gear ring and a first sun wheel; an output shaft of the engine is connected with the first planet carrier; the output shaft of the first motor is connected with a first sun gear; the second motor drives the first gear ring to rotate; the first gear ring drives the wheels to rotate through the output mechanism. In the utility model, the engine drives the first planet carrier to rotate, the first motor drives the first sun gear to rotate, and the second motor drives the first gear ring to rotate; the first gear ring is driven by specifically controlling the actions of the engine, the first motor and the second motor, the first gear ring drives the wheels to rotate through the output mechanism, a plurality of locking devices and clutches do not need to be controlled, and the complexity of a control strategy is effectively reduced.
Description
Technical Field
The utility model relates to a hybrid vehicle technical field, concretely relates to series-parallel double planetary gear power coupling device.
Background
Energy conservation and environmental protection are the subjects of development in the world at present, and the vigorous development of the automobile industry poses a greater crisis to the environment and energy. The motor vehicle reserves in China are continuously increased, and the motor vehicle reserves in the first major country of world motor vehicle production and marketing have lasted for 11 years. According to statistics, the number of motor vehicles in China in 2021 exceeds 4 hundred million. Obviously, the energy consumption and exhaust pollution of automobiles bring a serious challenge to people, and the development of new energy automobiles is in line with the rapid development of the demand of the times. In recent years, the world continuously releases the time schedule of the fuel oil vehicle for sale prohibition, which provides a huge space for the development of new energy vehicles.
Hybrid Electric Vehicles (HEVs) typically have two power inputs, a conventional engine and an electric motor (powered by a power battery). The power coupling device changes the working mode and provides corresponding power according to different running conditions of the vehicle through a reasonable structure and a scientific control strategy, and the structure and the coupling mode of the power coupling device influence the power performance and the emission characteristic of the vehicle to a great extent, so that the power coupling device is a key link for the research and development of a hybrid electric vehicle power system.
For example, chinese patent document CN104802628B discloses a single planetary gear train power coupling device and method for a hybrid electric vehicle, the power coupling device includes an engine, a motor, and a planetary gear train composed of a sun gear, a planet carrier, a ring gear, and a planet gear; the engine is connected with the planet carrier through a first clutch, and the engine is connected with the sun gear through a second clutch; the motor is connected with the sun gear; a first brake is arranged on the planet carrier, and a second brake is arranged on the gear ring; the ring gear is connected with an external transmission mechanism through a power output gear to transmit power to the vehicle drive wheels. The power coupling device can realize different working modes, so that the engine always works in the optimal fuel economy area. However, the single planetary gear system belongs to the rotating speed coupling, and cannot realize the torque coupling, so that the output torque is limited, and the dynamic property of the whole vehicle is insufficient. In addition, because the planet carrier and the gear ring are respectively provided with the locking devices, the switching between different working modes needs to respectively control the two locking devices and the two clutches, and the control strategy is too complex.
SUMMERY OF THE UTILITY MODEL
To the above-mentioned problem that prior art exists, the to-be-solved technical problem of the utility model is: because the planet carrier and the gear ring are respectively provided with the locking devices, the two locking devices and the two clutches need to be respectively controlled for switching between different working modes, and the control strategy is too complex.
In order to solve the technical problem, the utility model adopts the following technical scheme: a series-parallel double-planetary-gear power coupling device comprises: the device comprises a differential gear train, an engine, a first motor, a second motor and an output mechanism; the differential gear train comprises a first planet wheel, a first planet carrier, a first gear ring and a first sun wheel; an output shaft of the engine is connected with the first planet carrier; the output shaft of the first motor is connected with the first sun gear; the second motor drives the first gear ring to rotate; the first gear ring drives wheels to rotate through an output mechanism.
In the utility model, the engine drives the first planet carrier to rotate, the first motor drives the first sun gear to rotate, and the second motor drives the first gear ring to rotate; the first gear ring is driven by specifically controlling the actions of the engine, the first motor and the second motor, the first gear ring drives the wheels to rotate through the output mechanism, a plurality of locking devices and clutches do not need to be controlled, and the complexity of a control strategy is effectively reduced.
Preferably, the second motor passes through the first ring gear of ordinary gear train drive and rotates the power that comes the transmission second motor through the ordinary gear train and give first ring gear, and the second motor can be installed in narrow and small position in the setting of ordinary gear train, the effectual area that has reduced.
Preferably, the fixed gear train comprises a second sun gear, a second planet carrier, a second planet gear and a second gear ring; the output shaft of the second motor is connected with the second sun gear; the second planet carrier and the first gear ring are coaxially arranged, and the second planet carrier is connected with the first gear ring; and the second gear ring is fixedly connected with the frame. The second motor drives the second sun gear to rotate, the second planet carrier rotates to drive the second gear ring to synchronously rotate, and the second gear ring is fixed.
Preferably, the output mechanism comprises a first stage parallel gear set and a second stage parallel gear set; the first gear ring drives the first-stage parallel gear set to act; the first-stage parallel gear set drives the second parallel gear set to act; the second parallel gear set drives the wheels to rotate. The wheels are driven to rotate through the first-stage parallel gear set and the second parallel gear set, so that the transmission ratio between the first gear ring and the wheels can be better controlled.
Preferably, the first-stage parallel gear set comprises an intermediate gear and a first gear, and the intermediate gear is coaxially and fixedly connected with the first gear ring; the intermediate gear is meshed with the first gear, and the first gear drives the second parallel gear set to act. The first gear ring rotates to drive the intermediate gear coaxially fixed with the first gear ring to rotate, the intermediate gear drives the first gear to rotate, and the first gear drives the second parallel gear set to move.
Preferably, the second parallel gear set comprises a second gear and a third gear; the second gear and the first gear are coaxially fixed; the third gear is meshed with the second gear; and the third gear drives the wheel to rotate. The first gear rotates to drive the second gear to rotate, the second gear drives the third gear to rotate, and the third gear drives the wheels to rotate.
Compared with the prior art, the utility model discloses at least, following advantage has:
(1) By adopting a differential gear train and a fixed-axis gear train double-planetary gear system, two coupling modes of rotating speed coupling and torque coupling can be realized, and the double-planetary gear system has the advantage of large output torque;
(2) The arrangement of the differential gear train and the ordinary gear train has compact structure, saves space and is easy to arrange;
(3) The control is simple, and various working modes such as pure electric drive, engine single drive, hybrid drive, regenerative braking and the like are realized through different power outputs;
(4) Stepless speed change can be realized, and the whole vehicle does not need a matched gearbox.
Drawings
In order to more clearly illustrate the embodiments of the present invention, the drawings used in the embodiments will be briefly described below. In all the drawings, the elements or parts are not necessarily drawn to actual scale.
Fig. 1 is a structural diagram of a series-parallel double-planetary-gear power coupling device according to an embodiment.
Reference numerals: 1-differential gear train, 11-first planet wheel, 12-first planet carrier, 13-first ring gear, 14-first sun gear, 2-engine, 3-first electric machine, 4-second electric machine, 5-output mechanism, 51-intermediate gear, 52-first gear, 53-second gear, 54-third gear, 6-fixed-axis gear train, 61-second sun gear, 62-second planet carrier, 63-second planet wheel, 64-second ring gear, 7-clutch, 8-wheel.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.
In the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
Referring to fig. 1, the present invention provides an embodiment: a series-parallel double-planetary-gear power coupling device comprises: a differential gear train 1, an engine 2, a first motor 3, a second motor 4 and an output mechanism 5; the differential gear train 1 includes a first planetary gear 11, a first carrier 12, a first ring gear 13, and a first sun gear 14; the output shaft of the engine 2 is connected with a first planet carrier 12; further, the output shaft of the engine 2 is connected with the first planet carrier 12 through the clutch 7; the connection and disconnection of the engine 2 and the first planet carrier 12 can be controlled through the clutch 7; the output shaft of the first motor 3 is connected with a first sun gear 14; the second motor 4 drives the first gear ring 13 to rotate; the first ring gear 13 drives the wheels 8 to rotate via the output 5. In specific implementation, the engine 2 drives the first planet carrier 12 to rotate, the first motor 3 drives the first sun gear 14 to rotate, and the second motor 4 drives the first gear ring 13 to rotate; the first gear ring 13 is driven by specifically controlling the actions of the engine 2, the first motor 3 and the second motor 4, the first gear ring 13 drives the wheels 8 to rotate through the output mechanism 5, a plurality of locking devices and clutches 7 do not need to be controlled, and the complexity of a control strategy is effectively reduced.
Referring to fig. 1, in other embodiments, the second electric machine 4 drives the first ring gear 13 to rotate via the gear train 6. The power of coming transmission second motor 4 through ordinary gear train 6 gives first ring gear 13, and second motor 4 can be installed in narrow and small position in the setting of ordinary gear train 6, the effectual area that has reduced. Further, the fixed gear train 6 includes a second sun gear 61, a second planet carrier 62, a second planet gear 63 and a second ring gear 64; the output shaft of the second motor 4 is connected with a second sun gear 61; the second carrier 62 is arranged coaxially with the first ring gear 13, and the second carrier 62 is connected with the first ring gear 13; the second ring gear 64 is fixedly connected with the frame. In specific implementation, the second motor 4 drives the second sun gear 61 to rotate, the second planet carrier 62 rotates to drive the second ring gear 64 to synchronously rotate, and the second ring gear 64 is fixed.
Referring to fig. 1, in yet another embodiment, the output mechanism 5 includes a first stage parallel gear set and a second stage parallel gear set; the first gear ring 13 drives the first-stage parallel gear set to act; the first-stage parallel gear set drives the second parallel gear set to act; the second parallel gear set drives the wheels 8 to rotate. The wheels 8 are driven to rotate through the first-stage parallel gear set and the second-stage parallel gear set, so that the transmission ratio between the first gear ring 13 and the wheels 8 can be better controlled. Further, the first-stage parallel gear set comprises an intermediate gear 51 and a first gear 52, and the intermediate gear 51 is coaxially and fixedly connected with the first gear ring 13; the intermediate gear 51 is meshed with the first gear 52, and the first gear 52 drives the second parallel gear set to act. In specific implementation, the first gear ring 13 rotates to drive the intermediate gear 51 coaxially fixed with the first gear ring to rotate, the intermediate gear 51 drives the first gear 52 to rotate, and the first gear 52 drives the second parallel gear set to move. Further, the second parallel gear set includes a second gear 53 and a third gear 54; the second gear 53 is fixed coaxially with the first gear 52; the third gear 54 meshes with the second gear 53; and the third gear 54 drives the wheel 8 to rotate. In specific implementation, the first gear 52 rotates to drive the second gear 53 to rotate, the second gear 53 drives the third gear 54 to rotate, and the third gear 54 drives the wheel 8 to rotate.
The utility model discloses a series-parallel connection formula double planetary gear power coupling device, through reasonable control strategy, can select multiple mode such as pure electric drive, engine 2 individual drive, driving charge, hybrid drive, regenerative braking according to the driving operating mode that can not, concrete embodiment is as follows:
pure electric drive mode: when the electric quantity of the power battery is sufficient and the vehicle is in a starting and urban congestion working condition, the vehicle selects a pure electric driving mode; in this mode, the second electric machine 4 is operated, the engine 2 is stopped, and the first electric machine 3 is idled; the second motor 4 drives the second sun gear 61 to rotate, and then the output power of the second motor 4 is transmitted to the intermediate gear 51 through the ordinary gear train 6, and then is transmitted to the wheel 8 through the first-stage parallel gear set and the second-stage parallel gear set, at this moment, the engine 2 stops working, and the first motor 3 idles.
Driving mode of engine 2: when the vehicle runs at a higher speed and the required driving power is in the high-efficiency working area of the engine 2, the vehicle selects the driving mode of the engine 2; in the mode, the clutch 7 is closed, the engine 2 works, the second motor 4 idles, and the first motor 3 regulates the speed; the engine 2 drives the first planet carrier 12 to rotate, the output power of the engine 2 is transmitted to the intermediate gear 51 through the differential gear train 1, and then transmitted to the wheels 8 through the first-stage parallel gear set and the second parallel gear set. At this time, the first motor 3 performs stepless speed regulation, the first motor 3 regulates speed and does not output power, and the second motor 4 idles.
The driving charging mode is as follows: when the power required by the running of the vehicle is less than the high-efficiency output power of the engine 2, the first motor 3 and the second motor 4 generate electricity to increase the running load of the whole vehicle, so that the engine 2 works on the optimal curve of the engine, and the vehicle selects a running charging mode; in this mode, the clutch 7 is closed, the engine 2 is operated, and the first motor 3 and the second motor 4 are charged; the engine 2 drives the first planet carrier 12 to rotate, part of the output power of the engine 2 is transmitted to the first motor 3 through the differential gear train 1, part of the output power is transmitted to the second motor 4 through the fixed shaft gear train 6 to complete the charging operation, and the other part of the output power is transmitted to the intermediate gear 51 and then transmitted to the wheels 8 through the first-stage parallel gear set and the second parallel gear set.
Hybrid drive mode: when the vehicle is in a working condition with large running power demand, such as high-speed overtaking and the like, the power beyond the high-efficiency working area of the engine 2 is supplemented by the first motor 3 and the second motor 4; in this mode, the clutch 7 is closed, and the engine 2, the first electric machine 3, and the second electric machine 4 all operate; the engine 2 drives the first planet carrier 12 to rotate, the first motor 3 outputs power, and the output power is transmitted to the intermediate gear 51 through the differential gear train 1; the second motor 4 drives the second sun gear 61 to act, and the output power of the second motor 4 is transmitted to the intermediate gear 51 through the ordinary gear train 6; after the output power of the engine 2, the first motor 3 and the second motor 4 is coupled, the output power is transmitted to the wheels 8 through the first-stage parallel gear set and the second-stage parallel gear set.
Regenerative braking mode: when the vehicle is in the braking working conditions such as deceleration or downhill, the vehicle selects a regenerative braking mode; in this mode, the engine 2 is stopped, and the first motor 3 and the second motor 4 are charged. The vehicle kinetic energy flows into the second-stage parallel gear set and the first parallel gear from the wheels 8 in sequence, is divided through the intermediate gear 51, one part of the vehicle kinetic energy is transmitted to the second motor 4 through the fixed-axis gear train 6 for power generation, the other part of the vehicle kinetic energy is transmitted to the engine 2 and the first motor 3 through the differential gear train 1, and the vehicle kinetic energy is generated through the first motor 3 and the second motor 4 and converted into electric energy to be stored in the power battery.
The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the scope of the embodiments of the present invention, and are intended to be covered by the claims and the specification.
Claims (7)
1. A series-parallel double-planetary-gear power coupling device is characterized by comprising: the device comprises a differential gear train, an engine, a first motor, a second motor and an output mechanism;
the differential gear train comprises a first planet wheel, a first planet carrier, a first gear ring and a first sun wheel;
an output shaft of the engine is connected with the first planet carrier;
the output shaft of the first motor is connected with the first sun gear;
the second motor drives the first gear ring to rotate;
the first gear ring drives the wheels to rotate through the output mechanism.
2. The series-parallel double-planetary-gear power coupling device as claimed in claim 1, wherein the second motor drives the first ring gear to rotate through an ordinary gear train.
3. The series-parallel double-planet power coupling device according to claim 2, wherein the fixed gear train comprises a second sun gear, a second planet carrier, a second planet gear and a second ring gear; the output shaft of the second motor is connected with the second sun gear; the second planet carrier and the first gear ring are coaxially arranged, and the second planet carrier is connected with the first gear ring; and the second gear ring is fixedly connected with the frame.
4. The series-parallel double planetary power coupling device according to claim 1, wherein the output mechanism includes a first stage parallel gear set and a second stage parallel gear set; the first gear ring drives the first-stage parallel gear set to act; the first-stage parallel gear set drives the second parallel gear set to act; the second parallel gear set drives the wheels to rotate.
5. The series-parallel double-planetary-gear power coupling device according to claim 4, wherein the first-stage parallel gear set comprises an intermediate gear and a first gear, and the intermediate gear is coaxially and fixedly connected with the first gear ring; the intermediate gear is meshed with the first gear, and the first gear drives the second parallel gear set to act.
6. The series-parallel double planetary gear power coupling device according to claim 5, wherein the second parallel gear set comprises a second gear and a third gear; the second gear and the first gear are coaxially fixed; the third gear is meshed with the second gear; and the third gear drives the wheel to rotate.
7. The series-parallel double planetary power coupling device according to claim 1, wherein the output shaft of the engine is connected to the first carrier through a clutch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223029651.2U CN218702686U (en) | 2022-11-14 | 2022-11-14 | Series-parallel double-planetary-gear power coupling device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223029651.2U CN218702686U (en) | 2022-11-14 | 2022-11-14 | Series-parallel double-planetary-gear power coupling device |
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| CN218702686U true CN218702686U (en) | 2023-03-24 |
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| CN202223029651.2U Active CN218702686U (en) | 2022-11-14 | 2022-11-14 | Series-parallel double-planetary-gear power coupling device |
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| CN (1) | CN218702686U (en) |
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