CN201588908U - Double planetary gear train multi-dynamic coupling mechanism - Google Patents

Abstract

The utility model discloses a double planetary gear system multi-dynamic coupling mechanism, which is characterized in that a first planetary gear system composed of a first sun gear, a first planetary gear, a first planet carrier and a first ring gear is set; The second planetary gear system composed of the second sun gear, the second planetary gear, the second planet carrier and the second ring gear; the output shaft of the internal combustion engine is connected with the first planet carrier, and the rotation shaft of the first motor/generator is connected with the first sun The center shaft of the wheel is connected; the first ring gear is connected with the second planet carrier, the rotation shaft of the second motor/generator is connected with the center shaft of the second sun gear; the second ring gear is connected to the external transmission through the gear center shaft of the power output gear system; lockers are respectively arranged on the second sun gear central shaft, the first sun gear central shaft, the second planetary carrier and the first planetary carrier. The utility model has low control difficulty and can realize multiple working modes. The whole system is represented by a hybrid continuously variable transmission, so that the internal combustion engine always works in the best fuel economy zone.

Description

Double planetary gear train multi-dynamic coupling mechanism

technical field

The utility model relates to a power output and a power coupling device applied to motor vehicles.

Background technique

As a hybrid coupling device, there are a variety of planetary gear mechanisms for power distribution at home and abroad, but most of them have complex structures, some parts are difficult to realize industrial manufacturing, and multiple automatic clutches that are difficult to control and whose life is difficult to guarantee are required. Some institutions have few working modes and cannot realize the series working mode, and have low adaptability to working conditions such as frequent acceleration and deceleration of cars driving in urban areas; type hybrid vehicles; some institutions do not have a pure internal combustion engine working mode, which is not conducive to driving the car on the highway.

Utility model content

The utility model is to avoid the shortcomings of the above-mentioned prior art, and provides a double planetary wheel with compact structure, few transmission parts, simple structure of parts used, low difficulty in system control, and easy to realize mass industrialized manufacturing. It is a multi-power coupling mechanism, which is used as a hybrid power coupling device for vehicle drive, in order to achieve multiple working modes, so that the entire system appears as a continuously variable transmission that can use hybrid power, so that the internal combustion engine always works at the best fuel economy district.

The utility model solves the technical problem and adopts the following technical solutions:

The structural characteristics of the multi-dynamic coupling mechanism of the double planetary gear system of the utility model are:

setting a first planetary gear train consisting of a first sun gear, a first planetary gear, a first planetary carrier and a first ring gear;

setting a second planetary gear train consisting of a second sun gear, a second planetary gear, a second planetary carrier and a second ring gear;

The output shaft of the internal combustion engine is connected to the first planet carrier, the rotation shaft of the first motor/generator is connected to the central shaft of the first sun gear; the first ring gear is connected to the second planet carrier, and the rotation shaft of the second motor/generator is connected to the first sun gear The central shafts of the two sun gears are connected; the second ring gear is connected to the external transmission system through the gear central shaft of the power output gear;

The second sun gear shaft locker, the first sun gear shaft locker, and the second planet carrier lock are respectively arranged on the second sun gear central shaft, the first sun gear central shaft, the second planet carrier and the first planet carrier stopper and first planet carrier locker.

The utility model uses the second planetary gear train close to the output end as the external power output end; the power of the internal combustion engine and the first motor/generator is coupled on the first planetary gear train, and the power is transmitted by the ring gear of the first planetary gear train to the second planetary gear train. The second planetary gear train couples the power transmitted by the second motor/generator and the ring gear of the first planetary gear train, and finally outputs power to the external transmission mechanism through the ring gear of the second planetary gear train. In order to optimize the transmission ratio, the external transmission mechanism can be a speed-up or speed-down mechanism. The utility model cleverly realizes the coupling of three power sources, and because each coupling uses a planetary gear system power splitting mechanism, the difficulty of control is reduced, and the system is more reliable and easier to realize.

The utility model cooperates with the motor/generator and the internal combustion engine, and the four locking devices can respectively lock the power transmission shaft between the two motors/generators, the internal combustion engine and the secondary planetary gear train. Different working modes switched by the four lockers, and different working states of the motor/generator and internal combustion engine form multiple working modes, so as to realize the power output driving in response to various working conditions, so as to adapt to the various situations of the car in actual driving. different power requirements.

Compared with the prior art, the beneficial effects of the utility model are reflected in:

1. The utility model can conveniently realize five working modes such as series connection, parallel connection, mixed connection, pure electric power and braking energy recovery, especially without using an automatic clutch device with large volume, high cost and difficult control. It is convenient to quickly switch between multiple modes.

2. The utility model can realize the serial working mode which cannot be realized by general planetary gear trains. In the case of low battery power or complicated road conditions, this working mode has low energy consumption, good emission quality of the internal combustion engine, and simple control.

3. The utility model can work in the modes of parallel connection, mixed connection, pure electric power and braking energy recovery, and realize different cooperation modes of two motors/generators. Two motors/generators work at the same time or one of them can work according to Flexible selection of working power requirements, so as to provide greater energy output power, and make both motors/generators work in the best efficiency zone as much as possible.

4. The coupling of the power of the two motors/generators and the internal combustion engine in the utility model is through the planetary gear train, which greatly reduces the requirements for the control system and the control system for the speed control accuracy of the motor/generator and the internal combustion engine , is easy to implement and reduces system cost. After the vehicle speed enters the fuel economy zone of the internal combustion engine, the pure internal combustion engine working mode can be realized, the system efficiency can be improved, and the purpose of saving energy can be achieved.

5. The utility model adopts a simple structure of two planetary wheels and four shaft locking mechanisms, which has a simple and compact structure, high transmission efficiency, relatively easy manufacturing and processing, and high system reliability.

Description of drawings

Fig. 1 is a schematic structural diagram of the utility model and a schematic diagram of a parking working mode.

Fig. 2 is a schematic diagram of the working mode of starting the internal combustion engine of the utility model.

Fig. 3 is a schematic diagram of the working mode of the utility model for parking power generation.

Fig. 4 is a schematic diagram of the working mode of the tandem driving of the utility model.

Fig. 5 is a schematic diagram of pure electric working mode I of the utility model.

Fig. 6 is a schematic diagram of pure electric working mode II of the utility model.

Fig. 7 is a schematic diagram of pure electric working mode III of the utility model.

Fig. 8 is a schematic diagram of working mode I of driving power generation of the utility model.

Fig. 9 is a schematic diagram of working mode II of driving power generation of the present invention.

Fig. 10 is a schematic diagram of working mode III of driving power generation of the present invention.

Fig. 11 is a schematic diagram of the working mode of the pure internal combustion engine of the utility model.

Fig. 12 is a schematic diagram of parallel working mode I of the utility model.

Fig. 13 is a schematic diagram of parallel working mode II of the utility model.

Fig. 14 is a schematic diagram of parallel working mode III of the utility model.

Fig. 15 is a schematic diagram of working mode I of braking energy recovery of the present invention.

Fig. 16 is a schematic diagram of working mode II of braking energy recovery of the present invention.

Fig. 17 is a schematic diagram of working mode III of braking energy recovery of the present invention.

Labels in the figure: 1 second motor/generator, 2 second sun gear shaft locker, 3 second sun gear, 4 second planetary gear, 5 second planetary carrier locker, 6 first motor/generator, 7 first sun gear shaft locker, 8 first planetary gear, 9 first sun gear, 10 first planetary carrier locker, 11 internal combustion engine, 12 housing, 13 first ring gear, 14 second ring gear.

The utility model will be further described below through specific embodiments in conjunction with the accompanying drawings.

Detailed ways

Referring to Fig. 1, the structure of the double planetary gear train multi-dynamic coupling mechanism in this embodiment is set in the housing 12:

The first planetary gear train composed of the first sun gear 9, the first planetary gear 8, the first planet carrier and the first ring gear 13;

A second planetary gear train composed of the second sun gear 3, the second planetary gear 4, the second planet carrier and the second ring gear 14;

The internal combustion engine output shaft of the internal combustion engine 11 is connected with the first planetary carrier, and the rotating shaft of the first motor/generator 6 is connected with the central axis of the first sun gear; the first ring gear 13 is connected with the second planetary carrier, and the second motor/generator The rotating shaft of 1 is connected with the central shaft of the second sun gear; the second ring gear 14 is connected with the external transmission system through the central shaft of the power output gear.

As shown in Fig. 1, the second sun gear shaft locker 2, the first sun gear shaft locker 7, The second planet carrier lock 5 and the first planet carrier lock 10 .

The structural settings in this embodiment can realize the following various working modes.

Parking working mode:

In stop working mode, the system has no energy flow and is in a static state.

To activate the internal combustion engine operating mode:

When the system is in static or pure electric driving mode, if you want to start the internal combustion engine to participate in the system work, you need to start the internal combustion engine to a certain speed, and then smoothly couple the power of the internal combustion engine to the system. In this mode, the shaft locker between the two-stage planetary gear trains should be locked, so that the action of the first planetary gear train will not affect the movement of the vehicle, and the first motor/generator connected to the first sun gear will rotate , dragging the first planetary wheel to rotate, thereby driving the internal combustion engine to rotate to a certain speed, and then starting the internal combustion engine.

Parking power generation working mode:

If the battery power consumption of the system is too large, you can use the internal combustion engine to drive the motor/generator to generate electricity during parking, so as to supplement the battery with necessary power to make the system work more stably.

Working mode of tandem driving:

If the battery power is low, the serial working mode is often used in traffic jams or low speed road conditions. Use the internal combustion engine to drive the first motor/generator to generate electricity, supply it to the second motor/generator, and the second motor/generator will generate power for external output. If the generator generates more electric energy, part of it can be stored in the battery. In this working mode, the working condition of the internal combustion engine is stable, it can always work in the best fuel economy zone, and the emission of the internal combustion engine can be optimized.

Pure electric working mode I:

If the battery power is high, the pure electric working mode is often used in traffic jams or low speed road conditions. Drive the second motor/generator with pure electricity to complete the power output, transmit the power through the ring gear of the first-stage planetary gear system to the planetary gear of the second-stage planetary gear system, and finally transmit the power through the ring gear of the second-stage planetary gear system , so as to realize the pure electric working mode.

Pure electric working mode II:

If the battery power is high, the pure electric working mode is often used in traffic jams or low speed road conditions. The second motor/generator is driven by pure electricity to complete the power output. The planet carrier of the second planetary gear train is fixed by the shaft locker, so the power is transmitted to the second ring gear through the second planetary gear, and the power is transferred to the second ring gear through the second ring gear. pass it on. So as to realize the pure electric working mode.

Pure electric working mode III:

If the battery power is high, the pure electric working mode is often used in traffic jams or low speed road conditions. If the pure electric mode requires a large power, the dual-motor pure electric working mode can be used. The pure electric drive is powered by two motors/generators. The first motor/generator transmits power to the second planetary gear through the first ring gear. The second sun gear is driven by the second motor/generator. The two motors After the power is coupled through the second planetary gear train, the power is transmitted by the second ring gear, so as to realize the pure electric working mode.

Driving power generation working mode I:

When the vehicle is running at a medium speed, the driving power generation mode is used to optimize the working condition of the internal combustion engine so that it works in the fuel economy zone to achieve the purpose of energy saving and emission reduction. Generally, the fuel economy zone of the internal combustion engine has a higher speed and a larger torque output. If the power demand of the car during driving is not as large as the output power of the internal combustion engine, the generator can be used to generate electricity to absorb excess energy. In this mode, the internal combustion engine drives the planetary gear of the first-stage planetary gear train and its planetary carrier to rotate, through the first-stage planetary gear train, part of the energy is shunted to the first ring gear, and finally passed through the first gear of the second-stage planetary gear train. The second ring gear achieves external output, and the other part of the energy is used to drive the sun gear of the first-stage planetary gear system to rotate, generate electricity through the first motor/generator, and store it in the battery.

Driving power generation working mode II

In this mode, the first sun gear is fixed by the shaft locker, and the internal combustion engine drives the planetary gear and its planet carrier of the first-stage planetary gear train to rotate, and the energy is transmitted to the second planetary gear through the first ring gear. Part of the energy is shunted to the second ring gear through the second-stage planetary gear system to achieve external output, and the other part of the energy is used to drive the sun gear of the second-stage planetary gear system to rotate, generate electricity through the motor/generator, and store it in the battery middle.

Driving power generation working mode II:

In this mode, the internal combustion engine drives the first planetary carrier to rotate, a part of the energy is used to drive the first sun gear to rotate through the first planetary gear train, and generates electricity through the first motor/generator, which is stored in the battery. Another part of the energy is shunted to the first ring gear and transmitted to the second planetary gear. This part of energy is divided into two parts through the second-stage planetary gear train. One part drives the second motor/generator to generate electricity through the second sun gear, which is stored in the battery, and the other part is output to the outside through the second ring gear. This mode is suitable for the case where the power of the motor/generator is small, and a single motor/generator cannot efficiently absorb the power of the internal combustion engine. And it can switch the two motors/generators to work well, so that they both work in the high efficiency area.

Pure internal combustion engine working mode:

When the load and speed of the vehicle fall in the fuel economy zone of the internal combustion engine, such as highway conditions, the internal combustion engine directly outputs power to the outside, which can reduce energy conversion and improve system efficiency. In this working mode, the shaft locks connected to the two motors/generators are in a locked state, so that the two motors/generators do not participate in work. The rotation of the internal combustion engine drives the planetary gear of the first planetary gear train and its planetary carrier to rotate, and the energy is then transmitted to the second ring gear of the second planetary gear train through the first ring gear to realize the external output of energy.

Parallel working mode I

When the internal combustion engine is in the fuel economy zone and its output power cannot meet the power demand of the car, the parallel operation mode of electric motor assist is adopted. The rotation of the internal combustion engine drives the planetary gear and its planetary carrier of the first-stage planetary gear train to rotate. The first sun gear rotates under the drive of the first motor/generator, and the coupling of the two powers is realized through the first planetary gear train. The ring gear transmits energy to the second planetary gear train, and since the second sun gear is held by the shaft locker, the energy is transferred to the external drive system through the second ring gear.

Parallel working mode II:

When the internal combustion engine is in the fuel economy zone and its output power cannot meet the power demand of the car, the parallel operation mode of electric motor assist is adopted. The rotation of the internal combustion engine drives the planetary gear and its planetary carrier of the first planetary gear train to rotate, and the first sun gear is fixed by the shaft locker, so the energy is transmitted to the second planetary gear train through the first ring gear. The second sun gear is driven by the second motor/generator, and couples the power of the second motor/generator and the power of the internal combustion engine transmitted by the first planetary gear train through the second planetary gear train. Finally the energy is transmitted to the external drive system through the second ring gear.

Parallel working mode III:

When the internal combustion engine is in the fuel economy zone and its output power cannot meet the power demand of the car, the parallel operation mode of electric motor assist is adopted. The rotation of the internal combustion engine drives the planetary gear and its planetary carrier of the first planetary gear train to rotate, the first sun gear rotates under the drive of the motor/generator, the coupling of the two powers is realized through the first planetary gear train, and the The energy is transferred to the planet wheels of the second planetary gear train. The second sun gear is driven by the second motor/generator, and the energy from the second motor/generator is coupled with the energy from the first-stage planetary gear train through the second planetary gear train, and the finally coupled energy passes through the second ring gear passed to the external drive system. The two-stage planetary gear train couples three power sources to achieve high power output. Since all power coupling is completed through the planetary gear train, the requirements for control accuracy are reduced.

Braking energy recovery working mode I:

When the car needs to slow down, the generator is used to generate electricity to complete energy recovery and reduce unnecessary waste of energy. In this working mode, the kinetic energy of the car is transmitted to the second planetary gear through the ring gear of the second planetary gear train, and then to the first ring gear. The energy is transmitted to the first sun gear through the planetary gears of the first planetary gear train, and the first sun gear drives the first motor/generator to rotate to generate electricity, and the generated electric energy is stored in the battery. Complete energy recovery.

Braking energy recovery working mode II:

When the car needs to slow down, the generator is used to generate electricity to complete energy recovery and reduce unnecessary waste of energy. In this working mode, the kinetic energy of the car is transmitted to the second planetary gear through the second ring gear, and then to the second sun gear. The second sun gear drives the second motor/generator to rotate to generate electricity. The generated electric energy is stored in battery. Complete energy recovery.

Brake energy recovery working mode III:

When the car needs to slow down, the generator is used to generate electricity to complete energy recovery and reduce unnecessary waste of energy. In this working mode, the kinetic energy of the car is transmitted to the second planetary gear through the second ring gear, where the energy begins to split, and part of the energy is transmitted to the second sun gear, and the second sun gear drives the second motor/generator to rotate to generate electricity , the generated electrical energy is stored in the battery. The other part of the energy is transmitted to the first ring gear, and is transmitted to the first sun gear through the planetary gear of the first planetary gear train. The first sun gear drives the first motor/generator to rotate to generate electricity, and the generated electric energy is stored in the battery middle. Energy recovery is accomplished by a total of two generators. This method is beneficial to the energy recovery condition of the car at high speed. The two motors can achieve greater energy return power. The two motors participate in or participate in power generation at the same time, so that both motors work in a high-efficiency range and recover more energy.

As shown in Figure 2, the system is in the working mode of starting the internal combustion engine. The first sun gear shaft locker 7 is released, the second planetary carrier locker 5 is locked, the first motor/generator 6 rotates, and the energy is transmitted to the first planetary gear 8, and the first planetary gear 8 and its planetary carrier drag The internal combustion engine 11 is driven to rotate, and the internal combustion engine 11 is started.

As shown in Figure 3, the system is in the working mode of parking power generation. The internal combustion engine 11 drives the first planetary gear 8 and its planetary carrier to rotate, and the second planetary carrier locker 5 is locked, thereby fixing the first ring gear 13, so the energy generated by the rotation of the first planetary wheel 8 and its planetary carrier is completely transmitted When it reaches the first sun gear 9, it drives the first motor/generator 6 to rotate to generate electricity and charge the battery through the charging system.

As shown in Figure 4, the system is in the tandem driving mode. The energy required for series driving comes from the battery and the first motor/generator 6 . The internal combustion engine 11 drives the first planetary gear carrier to rotate, and the second planetary carrier locker 5 is in the locking mode, thereby fixing the first ring gear 13, so the energy generated by the rotation of the first planetary gear 8 and its planetary carrier is all transmitted to the second planetary gear 8 A sun gear 9 drives the motor/generator 6 to rotate to generate electricity, and charges the battery through the charging system or directly supplies the second motor/generator 1 through the energy distribution circuit to drive the car. The second motor/generator 1 acts as a motor, consumes the energy generated by the battery or the first motor/generator 6, and generates driving force that is transmitted to the second planetary gear 4 through the second sun gear 3. Since the second planetary locker 5 is in In the locked state, all the energy is transmitted to the second ring gear 14 through the second planetary gear 4, and then output to the external transmission system. In the series operation mode, the working condition of the internal combustion engine 11 is fixed, and the change of the external working condition is adapted by the second motor/generator 1, and the internal combustion engine 11 can always work in the best fuel economy zone, thereby achieving lower energy consumption consume.

As shown in Figure 5, the system is in pure electric working mode I. In this mode, the first motor/generator 6 drives the first sun gear 9 to rotate. Since the first planet carrier locker 10 is in the locked state, the energy is transmitted to the first ring gear 13 and then to the second planetary gear 4. Due to the locking of the second sun gear shaft locker 2 , energy is transmitted to the external transmission system through the second ring gear 14 .

As shown in Figure 6, the system is in pure electric mode II. The first motor/generator 1 drives the first sun gear 3 to rotate, and since the second planet carrier locker 5 is locked, the energy is transmitted to the external transmission system through the second ring gear 14 .

As shown in Fig. 7, the system is in pure electric working mode III. The first motor/generator 6 drives the first sun gear 9 to rotate. Since the first planet carrier locker 10 is locked, the energy is transmitted to the first ring gear 13 and then to the second planetary gear 4 . The second motor/generator 1 drives the second sun gear 3 to rotate, and the second planetary gear train couples the energy transmitted by the first planetary gear train to the second planetary gear 4 , and transmits it to the external transmission system through the second ring gear 14 . When the power demand is greater, higher speeds can be obtained in this mode.

As shown in Fig. 8, the system is in working mode I of power generation while driving. The internal combustion engine 11 rotates, driving the first planetary gear 8 and its planetary carrier to rotate, because the second planetary carrier locker 5 and the first sun gear shaft locker 7 are both loosened, so the first planetary wheel 8 and its planetary carrier drive the sun gear 9 and the first ring gear 13 rotate, through the speed of the first motor/generator 6, the purpose of adjusting the rotational speed of the first ring gear 13 is achieved, thereby completing energy splitting. Since the second sun gear shaft locker 2 is locked, the energy transmitted by the first ring gear 13 directly drives the second planetary gear 4 and its planetary carrier to rotate, and the energy is transferred to the second ring gear 14, and then to the external transmission system.

As shown in Fig. 9, the system is in driving power generation working mode II. The rotation of the internal combustion engine 11 drives the first planetary gear 8 and its planetary carrier to rotate. Since the first sun gear shaft locker 7 is locked, the first planetary gear 8 and its planetary carrier drive the first ring gear 13 to rotate, and the energy is transferred to the second Two planetary gear trains. Since the second sun gear shaft locker 2 is loosened, the energy transmitted by the first ring gear 13 drives the second planetary gear 4 and its planetary carrier to rotate, and the energy is transmitted to the second sun gear 3 and the second ring gear 14, through Adjust the speed of the second motor/generator 1 to adjust the speed of the second ring gear 14 to complete energy splitting. Finally, the energy is transmitted to the external transmission system through the second ring gear 14 .

As shown in Fig. 10, the system is in driving power generation working mode III. The rotation of the internal combustion engine 11 drives the first planetary gear 8 and its planetary carrier to rotate. Since the second planetary carrier locker 5 and the first sun gear shaft locker 7 are both released, the first planetary gear 8 and its planetary carrier drive the first planetary gear 8 and its planetary carrier to rotate. The sun gear 9 and the first ring gear 13 rotate, and by adjusting the speed of the first motor/generator 6, the speed of the first ring gear 13 is adjusted, thereby completing the role of energy splitting and controlling the proportion of energy transmitted to the second planetary gear train . Since the second sun gear shaft locker 2 is loosened, the energy transmitted by the first ring gear 13 drives the second planetary gear 4 and its planetary carrier to rotate, and the energy is transmitted to the second sun gear 3 and the second ring gear 14, through Adjusting the rotation speed of the second motor/generator 1 adjusts the rotation speed of the second ring gear 14 to complete further energy splitting and transfer less energy to the external transmission system.

As shown in Figure 11, the system is in pure internal combustion engine mode. Both the second sun gear shaft locker 2 and the first sun gear shaft locker 7 are locked, and the two motors/generators do not participate in work. The internal combustion engine 11 rotates, driving the first planetary gear 8 and its planetary carrier to rotate, and the energy is transmitted to the second planetary gear 4 and its planetary carrier through the first ring gear 13, and then to the second ring gear 14 to realize the external output of energy.

As shown in Figure 12, the system is in parallel working mode I. The second sun gear shaft locker 2 is locked, and all other shaft lockers are loosened. The internal combustion engine 11 drives the first planetary gear 8 and its planetary carrier to rotate, the first motor/generator 6 drives the first sun gear 9 to rotate, energy coupling is performed through the first planetary gear mechanism, and the coupled energy is transmitted to the The second planetary gear train adjusts the rotational speed of the first motor/generator 6 to adjust the size of the second-stage power output. Due to the locking of the second sun gear shaft locker 2 , the energy is transmitted to the second ring gear 14 through the second planetary gear 4 , and finally the energy is transmitted to the external transmission system through the second ring gear 14 .

As shown in Figure 13, the system is in parallel working mode II. The first sun gear shaft locker 7 is locked, and all other shaft lockers are loosened. The rotation of the internal combustion engine 11 drives the first planetary gear 8 and its planetary carrier to rotate. Since the first sun gear shaft locker 7 is locked, the first planetary gear 8 and its planetary carrier drive the first ring gear 13 to rotate and transfer energy to Second planetary gear train. The second motor/generator 1 drives the second sun gear 3 to rotate, its energy and the energy transmitted by the first ring gear 13 are coupled through the second planetary gear, and the energy is transmitted to the second ring gear 14 to adjust the second motor/generator The rotation speed of the machine 1 is used to adjust the rotation speed of the second ring gear 14 to complete the energy coupling. Finally, the energy is transmitted to the external transmission system through the second ring gear 14 .

As shown in Figure 14, the system is in parallel working mode III. All shaft locks are released. The internal combustion engine 11 drives the first planetary gear 8 and its planetary carrier to rotate, the first motor/generator 6 drives the first sun gear 9 to rotate, energy coupling is performed through the first planetary gear train, and the coupled energy is transmitted to the The second planetary gear train adjusts the rotational speed of the first motor/generator 6 to adjust the size of the second-stage power output. The second motor/generator 1 drives the second sun gear 3 to rotate, and its energy is coupled with the energy transmitted by the first ring gear 13 through the second planetary gear, and the coupled energy is transmitted to the second ring gear 14 to adjust the second The rotation speed of the motor/generator 1 is used to adjust the rotation speed of the second ring gear 14 to complete energy coupling. Finally, the energy is transmitted to the external transmission system through the second ring gear 14 . Finally, the energy coupling of the three power units is completed.

As shown in Figure 15, the system is in braking energy recovery working mode I. The second sun gear shaft locker 2 and the first planetary carrier locker 10 are locked, and the kinetic energy of the vehicle is transmitted to the second planetary gear 4 through the second ring gear 14 , and then to the first ring gear 13 . Due to the locking of the first planetary carrier locker 10, the energy is transmitted to the first sun gear 9 through the first planetary gear 8 and its planetary carrier, and the first sun gear 9 drags the first motor/generator 6 to rotate to generate electricity , the generated electric energy is stored in the battery.

As shown in Fig. 16, the system is in braking energy recovery working mode II. The second planet carrier locker 5 is locked, and the kinetic energy of the car is transmitted to the second planetary gear 4 through the second ring gear 14, and then transmitted to the second sun gear 3, and the second sun gear drives the second motor/power generation The machine 1 rotates to generate electricity, and the generated electric energy is stored in the battery.

As shown in Fig. 17, the system is in braking energy recovery working mode III. The first planetary carrier locker 10 is locked, and the kinetic energy of the vehicle is transmitted to the second planetary gear 4 through the second ring gear 14, where power splitting is realized. Part of the power is transmitted to the second sun gear 3, and the second sun gear 3 drives the second motor/generator 1 to rotate to generate electricity, and the generated electric energy is stored in the battery. Another part of energy is transmitted to the first ring gear 13, and the energy is transmitted to the first sun gear 9 through the first planetary gear 8 and its planetary carrier, and the first sun gear 9 drags the first motor/generator 6 to rotate to generate electricity, so The generated electrical energy is stored in the battery. This method is beneficial to the energy recovery condition of the car at high speed. The two motors can achieve greater energy return power. The two motors participate in or participate in power generation at the same time, so that both motors work in a high-efficiency range and recover more energy.

Claims (1)

1. the structural feature of multi-power coupling mechanism of dual planetary gear train is:

First planetary gear train that setting is made of first sun gear, first planet wheel, first planet carrier and first gear ring;

Second planetary gear train that setting is made of second sun gear, second planet wheel, second planet carrier and second gear ring;

The internal-combustion engine output revolving shaft is connected with first planet carrier, and the rotatingshaft of first motor/generator (6) is connected with the first sun gear central shaft; First gear ring is connected with second planet carrier, and the rotatingshaft of second motor/generator (1) is connected with the second sun gear central shaft; Connect outside power train with the central gear axis of second gear ring by power output gear;

The second sun wheel shaft locking engagement (2), the first sun wheel shaft locking engagement (7), the second planet carrier locking engagement (5) and the first planet carrier locking engagement (10) are set respectively on the described second sun gear central shaft, the first sun gear central shaft, second planet carrier and first planet carrier.

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