CN114076180A - Planetary gear transmission device, power driving system and vehicle - Google Patents

Planetary gear transmission device, power driving system and vehicle Download PDF

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Publication number
CN114076180A
CN114076180A CN202010850475.5A CN202010850475A CN114076180A CN 114076180 A CN114076180 A CN 114076180A CN 202010850475 A CN202010850475 A CN 202010850475A CN 114076180 A CN114076180 A CN 114076180A
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China
Prior art keywords
power
engine
planetary gear
power transmission
planet
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Granted
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CN202010850475.5A
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Chinese (zh)
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CN114076180B (en
Inventor
杨胜麟
邹小松
王坤城
王建新
高缘
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BYD Co Ltd
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BYD Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H1/00—Toothed gearings for conveying rotary motion
    • F16H1/28—Toothed gearings for conveying rotary motion with gears having orbital motion
    • F16H1/32—Toothed gearings for conveying rotary motion with gears having orbital motion in which the central axis of the gearing lies inside the periphery of an orbital gear
    • 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
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/22—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
    • B60K6/36—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the transmission gearings
    • B60K6/365—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the transmission gearings with the gears having orbital motion
    • 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
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/42—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by the architecture of the hybrid electric vehicle
    • B60K6/44—Series-parallel type
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/62—Hybrid vehicles

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • General Engineering & Computer Science (AREA)
  • Hybrid Electric Vehicles (AREA)
  • Arrangement Of Transmissions (AREA)

Abstract

The invention relates to the technical field of vehicle power transmission, and discloses a planetary gear transmission device, a power driving system and a vehicle. The planetary gear transmission comprises a first sun gear, the first sun gear is arranged on a first support shaft, and the first support shaft comprises a first power transmission connecting part; a carrier including a third power transmission connection portion; a first planet gear rotatably disposed on the planet carrier and meshed with the first sun gear; a second sun gear disposed on a second support shaft, the second support shaft including a second power transfer connection; a second planet gear rotatably disposed on the planet carrier and meshing with the first planet gear and the second sun gear. The planetary gear transmission device is simple in structure and low in cost, and can realize multiple operation modes of a power driving system.

Description

Planetary gear transmission device, power driving system and vehicle
Technical Field
The invention relates to the technical field of vehicle power transmission, in particular to a planetary gear transmission device, a power driving system and a vehicle.
Background
At present, in an existing hybrid power driving system, a power split type hybrid power system based on a planetary gear train is one of the mainstream hybrid power systems at present, and the hybrid power system can realize complete decoupling of an engine and wheels, can realize multiple flexible working modes without a clutch, a gear shifting mechanism and a complex hydraulic system, and has a stepless speed change function.
However, most of such hybrid drive systems use NGW planetary gear mechanisms (i.e., planetary gear transmission mechanisms composed of an internal gear pair (N), an external gear pair (W) and a common planetary gear (G)) as power distribution and power splitting implementation units, and in the existing hybrid drive systems based on such architectures, the manufacture of the ring gear is relatively complex and the cost is relatively high. In addition, the planetary gear mechanism has a single structure, cannot adapt to different assembly requirements, and limits the application universality.
Disclosure of Invention
The invention aims to provide a planetary gear transmission device which is simple in structure and low in cost and can realize multiple operation modes of a power driving system.
In order to achieve the above object, the present invention provides a planetary gear transmission including a first sun gear provided on a first support shaft including a first power transmission connection portion; a carrier including a third power transmission connection portion; a first planet gear rotatably disposed on the planet carrier and meshed with the first sun gear; a second sun gear disposed on a second support shaft, the second support shaft including a second power transfer connection; a second planet gear rotatably disposed on the planet carrier and meshing with the first planet gear and the second sun gear.
In the technical scheme, the planetary gear transmission device comprises a first support shaft and a second support shaft, wherein the first support shaft and the second support shaft can be flexibly installed at required positions through bearings according to actual requirements, so that a first sun gear and a second sun gear can be flexibly installed according to actual requirements, in addition, a second planet gear can be rotatably arranged on a planet carrier and is meshed with the first planet gear and the second sun gear, therefore, compared with the existing planetary gear system, the planetary gear transmission device has no inner gear ring, the first sun gear, the second sun gear, the first planet gear and the second planet gear adopt an outer gear structure, the outer gear structure is easier to process and manufacture and lower in cost, meanwhile, the first support shaft comprises a first power transmission connecting part, the planet carrier comprises a third power transmission connecting part, and the second support shaft comprises a second power transmission connecting part, in this way, the planetary gear transmission may be used in desired combinations with an external power take off unit and an external power source, such as an engine, a generator, and a drive motor, to form a corresponding power drive system, to enable the power drive system to have multiple operating modes.
Further, the second planet gears have a predetermined length extending axially to enable the second sun gear to be adjusted axially to a desired meshing position.
Further, the first power transmission connecting part is a generator connecting part used for being in transmission connection with a generator; the second power transmission connecting part is a driving motor connecting part which is used for being in transmission connection with a driving motor; the third power transmission connecting part is an engine connecting part which is used for being in transmission connection with an engine.
In addition, the planet carrier comprises a planet carrier central shaft, a plurality of first planet wheel supporting shafts which are connected to the planet carrier central shaft and are circumferentially arranged at intervals, and a plurality of second planet wheel supporting shafts which are respectively connected to each first planet wheel supporting shaft, wherein one end of each second planet wheel supporting shaft is connected to each first planet wheel supporting shaft through a radial connecting part which is positioned at the same end part of each first planet wheel and each second planet wheel in the axial direction; each first planet wheel is arranged on each first planet wheel supporting shaft, and each second planet wheel is arranged on each second planet wheel supporting shaft.
Further, the first support shaft is a hollow shaft, and a planet carrier central shaft of the planet carrier axially penetrates out of the hollow shaft, wherein the first power transmission connecting part and a third power transmission connecting part of the planet carrier central shaft are positioned on the same side of the planet carrier; the second power transmission connecting portion is located on the other side of the carrier.
Optionally, the second support shaft is a hollow shaft, and a carrier central shaft of the carrier axially penetrates out of the hollow shaft, wherein the second power transmission connection part and a third power transmission connection part of the carrier central shaft are located on the same side of the carrier; the first power transmission connecting portion is located on the other side of the planet carrier.
Optionally, the second support shaft is a hollow shaft, and the first support shaft axially penetrates out of the hollow shaft, wherein the first power transmission connection part and the second power transmission connection part are located on one side of the planet carrier; the third power transmission connecting portion of the carrier central shaft of the carrier is located on the other side of the carrier.
In addition, the present invention provides a power drive system comprising an engine, a generator and the planetary gear transmission as described in any of the above, wherein one of the first power transmission connection, the second power transmission connection and the third power transmission connection is in driving connection with the engine; the other of the first power transmission connecting portion, the second power transmission connecting portion, and the third power transmission connecting portion is drivingly connected to the generator.
Thus, as described above, the planetary gear transmission may form a power drive system with the engine and the generator such that the power drive system has multiple operating modes.
Further, the starting of the engine is achieved by the planetary gear transmission and adjusting the rotational speed of the generator.
Further, the generator is capable of regulating the speed and load of the engine.
In addition, the power driving system further comprises a driving motor.
Further, the power drive system is capable of at least two modes: the system comprises a pure electric drive mode, an engine and drive motor combined drive mode, a brake feedback working mode and a parking power generation working mode.
Further, the engine, the generator, and the planetary gear transmission form a forward drive hybrid assembly, and one of the first power transfer connection, the second power transfer connection, and the third power transfer connection serves as a power output of the forward drive hybrid assembly; the driving motor is used for forming a rear-drive pure electric assembly.
Alternatively, one of the first power transmission connection part, the second power transmission connection part and the third power transmission connection part is in direct power transmission connection with the driving motor and then is in power transmission connection with a reduction gear set of a power driving system, and the reduction gear set is used as a power output part of the power driving system.
Alternatively, the driving motor and one of the first power transmission connecting portion, the second power transmission connecting portion and the third power transmission connecting portion may be connected by a reduction gear set of a power drive system, the reduction gear set serving as a power output portion of the power drive system.
In addition, the power driving system comprises any one of the following modes: the first method is as follows: the engine and the generator are positioned on one side of the planetary gear transmission device, and the driving motor is positioned on the other side of the planetary gear transmission device; the second method comprises the following steps: the engine and the driving motor are positioned on one side of the planetary gear transmission device, and the generator is positioned on the other side of the planetary gear transmission device; the third method comprises the following steps: the engine is located on one side of the planetary gear transmission, and at least one of the drive motor and the generator is arranged around the planetary gear transmission; the method is as follows: the engine is positioned on one side of the planetary gear transmission device, the generator is positioned on the other side of the planetary gear transmission device, and the driving motor is arranged on the radial side of the planetary gear transmission device; the fifth mode is as follows: the engine is located on one side of the planetary gear transmission, and the driving motor and the generator are located on the other side of the planetary gear transmission.
Finally, the invention provides a vehicle provided with a power drive system as described in any of the above.
Drawings
FIG. 1 is a schematic illustration of a planetary gear transmission according to an embodiment of the present invention;
FIG. 2 is an axial side view of FIG. 1;
FIG. 3 is a schematic illustration of a first hybrid drive system provided in accordance with an embodiment of the present invention;
FIG. 4 is a schematic illustration of a second hybrid drive system provided in accordance with an embodiment of the present invention;
FIG. 5 is a schematic illustration of a third hybrid drive system provided in accordance with an embodiment of the present invention;
FIG. 6 is a schematic illustration of a fourth hybrid drive system provided in accordance with an embodiment of the present invention;
FIG. 7 is a schematic illustration of a fifth hybrid drive system provided in accordance with an embodiment of the present invention;
FIG. 8 is a schematic illustration of a sixth hybrid drive system provided in accordance with an embodiment of the present invention;
FIG. 9 is a schematic illustration of a seventh hybrid drive system according to an embodiment of the present invention;
FIG. 10 is a schematic illustration of an eighth hybrid drive system provided in accordance with an embodiment of the present invention;
FIG. 11 is a schematic illustration of a ninth hybrid drive system, in accordance with an embodiment of the present invention;
FIG. 12 is a schematic illustration of a tenth hybrid drive system in accordance with an embodiment of the present invention;
FIG. 13 is a schematic illustration of an eleventh hybrid drive system according to an exemplary embodiment of the present invention;
FIG. 14 is a schematic illustration of a twelfth hybrid drive system provided in accordance with an embodiment of the present invention;
FIG. 15 is a schematic illustration of a thirteenth hybrid drive system in accordance with an embodiment of the present invention;
FIG. 16 is a schematic illustration of a fourteenth hybrid drive system, according to an exemplary embodiment of the present invention;
FIG. 17 is a schematic illustration of the hybrid drive system of FIGS. 3-15 in an electric-only drive mode;
FIG. 18 is a schematic illustration of the hybrid drive system of FIGS. 3-15 in an engine-driven mode;
FIG. 19 is a schematic illustration of the hybrid drive system of FIGS. 3-15 in an engine and drive motor combination drive mode;
FIG. 20 is a schematic illustration of the hybrid drive system of FIGS. 3-15 in a brake feedback mode of operation;
FIG. 21 is a schematic illustration of the hybrid drive system of FIGS. 3-15 in a park electric mode of operation;
FIG. 22 is a schematic illustration of the hybrid drive system of FIGS. 3-15 in a reverse mode of operation;
FIG. 23 is a schematic illustration of the hybrid drive system of FIG. 16 in an electric-only drive mode;
FIG. 24 is a schematic illustration of the hybrid drive system of FIG. 16 in an engine-driven mode;
FIG. 25 is a schematic illustration of the hybrid drive system of FIG. 16 in an engine-to-drive motor combined drive mode;
FIG. 26 is a schematic illustration of the hybrid drive system of FIG. 16 in a brake feedback mode of operation;
FIG. 27 is a schematic illustration of the hybrid drive system of FIG. 16 in a park electric mode of operation;
FIG. 28 is a schematic illustration of the hybrid drive system of FIG. 16 in a reverse mode of operation.
Description of the reference numerals
1-a first sun wheel, 2-a first support shaft, 3-a generator, 4-a planet carrier, 5-a first planet wheel, 6-a second sun wheel, 7-a second support shaft, 8-a second planet wheel, 9-a driving motor, 10-an engine connecting shaft, 11-an engine, 12-a front driving hybrid assembly, 13-a rear driving pure electric assembly, 14-a reduction gear set, 15-a differential, 41-a first planet wheel support shaft, 42-a second planet wheel support shaft, and 43-a radial connecting part.
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, the planetary gear transmission provided by the present invention comprises a first sun gear 1, a planet carrier 4, a first planet gear 5, a second sun gear 6 and a second planet gear 8, wherein the first sun gear 1 is arranged on a first support shaft 2, the first support shaft 2 comprises a first power transmission connection; the carrier 4 includes a third power transmission connecting portion; a first planet wheel 5 is rotatably arranged on the planet carrier 4 and meshes with the first sun wheel 1; the second sun gear 6 is arranged on a second support shaft 7, and the second support shaft 7 comprises a second power transmission connecting part; the second planet wheels 8 are rotatably arranged on the planet carrier 4 and mesh with the first planet wheels 5 and the second sun wheel 6.
In the technical scheme, the first support shaft 2 and the second support shaft 7 are included, and the first support shaft 2 and the second support shaft 7 can be flexibly installed at required positions through bearings according to actual requirements, so that the first sun gear 1 and the second sun gear 6 can be flexibly installed according to actual requirements, in addition, the second planet gear 8 can be rotatably arranged on the planet carrier 4 and is meshed with the first planet gear 5 and the second sun gear 6, so that compared with the existing planetary gear train, the planetary gear transmission device has no inner gear ring, the first sun gear 1, the second sun gear 6, the first planet gear 5 and the second planet gear 8 adopt an external tooth structure which is easier to process and manufacture and has lower cost, meanwhile, the first support shaft 2 comprises a first power transmission connecting part, the planet carrier 4 comprises a third power transmission connecting part, the second support shaft 7 comprises a second power transmission connecting part, in this way, the planetary gear transmission may be used in desired combinations with an external power take off unit and an external power source, such as an engine, a generator, and a drive motor, to form a corresponding power drive system, to enable the power drive system to have multiple operating modes.
In addition, the second planet wheels 8 have a predetermined length extending in the axial direction to enable the second sun wheel 6 to be adjusted in the axial direction to a desired meshing position, i.e. the second sun wheel 6 can remain meshed with the second planet wheels 8 irrespective of the position to which the second sun wheel 6 is adjusted in the axial direction. In this way, the planetary gear set can adjust the second sun gear 6 to a desired meshing position in the axial direction according to actual installation requirements, so that the planetary gear set can be more widely applied to different installation situations. Of course, the axial position adjustment of the second sun gear 6 may be achieved in various ways, for example, in one way, the position of the second sun gear 6 is adjusted with respect to the second support shaft 7, or, in another way, since the second support shaft 7 is provided, the second support shaft 7 may be axially adjusted as needed to adjust the axial position of the second sun gear 6.
In the planetary gear transmission, the first power transmission connection may be a power input portion or a power output portion, and in addition, the first power transmission connection may be connected with an engine, or a generator, or a driving motor, or the first power transmission connection may be used for connection with a reduction gear set. Similarly, the second power transmission connection portion may be a power input portion or a power output portion, and in addition, the second power transmission connection portion may be connected to an engine, a generator, a driving motor, or a reduction gear set. Similarly, the third power transmission connection may be a power input portion or a power output portion, and in addition, the third power transmission connection may be connected to an engine, a generator, a driving motor, or a reduction gear set. Thus, the planetary gear transmission device has wider application range.
Thus, in one embodiment, the first power transfer connection is a generator connection for driving connection with a generator; the second power transmission connecting part is a driving motor connecting part which is used for being in transmission connection with a driving motor 9; the third power transmission connecting part is an engine connecting part which is used for being in transmission connection with an engine;
in addition, in the planetary gear transmission, the carrier may have various configurations, but whatever configuration is adopted, it is sufficient if it can include the third power transmission connection portion and rotatably support the first planetary gear and the second planetary gear. For example, as shown in fig. 1, in one structural form of the planet carrier, the planet carrier 4 includes a planet carrier central shaft 10, a plurality of first planet wheel supporting shafts 41 connected to the planet carrier central shaft 10 and arranged circumferentially at intervals, and a plurality of second planet wheel supporting shafts 42 respectively connected to each of the first planet wheel supporting shafts 41, and one end of each of the second planet wheel supporting shafts 42 is connected to each of the first planet wheel supporting shafts 41 through a radial connecting portion 43 located at the same end portion of the first planet wheel 5 and the second planet wheel 8 in the axial direction; each first planetary gear 5 is provided on each first planetary gear support shaft 41, and each second planetary gear 8 is provided on each second planetary gear support shaft 42. The planet carrier central axis 10 may extend on the same side of the radial connecting portion 43, as shown in fig. 1, or the planet carrier central axis 10 may extend on a side facing away from the radial connecting portion 43, as shown in fig. 7. In addition, the radial connecting portion 43 is located at the same end portion of the first planet wheel 5 and the second planet wheel 8 in the axial direction, so that the second planet wheel 8 forms a complete planet wheel in the axial direction, the second planet wheel 8 is prevented from being divided into two parts in the axial direction, and the complete planet wheel can effectively improve the stability of rotation and power transmission of the second planet wheel 8.
In addition, the planetary gear transmission device may have various structural forms, for example, in one structural form of the planetary gear transmission device, as shown in fig. 1, fig. 3 to fig. 6, fig. 8, fig. 9, fig. 10, fig. 11 and fig. 12, the first support shaft 2 is a hollow shaft, and a carrier central shaft of the carrier 4 axially penetrates out from the hollow shaft, wherein the first power transmission connection portion and the third power transmission connection portion of the carrier central shaft 10 are located on the same side of the carrier 4, for example, the generator connection portion and the engine connection portion are located on the same side of the carrier 4; and a second power transmission connection is located on the other side of the carrier 4, e.g., a drive motor connection is located on the other side of the carrier 4.
Alternatively, in another structure form of the planetary gear transmission device, as shown in fig. 7, the second support shaft 7 is a hollow shaft, and the carrier central shaft 10 of the carrier 4 axially penetrates out of the hollow shaft, wherein the second power transmission connection portion and the third power transmission connection portion of the carrier central shaft 10 are located on the same side of the carrier 4, for example, the driving motor connection portion and the engine connection portion are located on the same side of the carrier 4; the first power transmission connection is located on the other side of the carrier 4, for example the generator connection is located on the other side of the carrier 4.
Still alternatively, in another structure form of the planetary gear transmission device, as shown in fig. 14, the second support shaft 7 is a hollow shaft, and the first support shaft 2 axially penetrates out of the hollow shaft, wherein the first power transmission connection portion and the second power transmission connection portion are located on one side of the planet carrier 4, for example, the generator connection portion and the driving motor connection portion are located on one side of the planet carrier 4; the third power transmission connection portion of the carrier central shaft 10 of the carrier 4 is located on the other side of the carrier 4, and for example, the engine connection portion is located on the other side of the carrier 4.
In this way, it can be seen from the above three structural forms that the planetary gear can have a plurality of different structural forms to meet different practical arrangement requirements.
In addition, the present invention also provides a power drive system, referring to fig. 3-16, comprising an engine 11, a generator 3 and a planetary gear transmission as described in any of the above, wherein one of the first power transmission connection, the second power transmission connection and the third power transmission connection is in driving connection with the engine 11; the other of the first power transmission connecting portion, the second power transmission connecting portion, and the third power transmission connecting portion is drivingly connected to the generator 3.
Thus, as described above, the planetary gear transmission may form a power drive system with the engine and the generator such that the power drive system has multiple operating modes.
In addition, in an embodiment of the power driving system, the engine 11 is in transmission connection with the engine connection part, and the generator 3 is in transmission connection with the generator connection part, since the generator 3 can be in power connection with the engine 11 through the first sun gear 1, the first planetary gear 5 and the planet carrier 4, so that the engine 11 can be started without a special starting motor, and the starting of the engine 11 is realized through a planetary gear transmission device and the rotation speed of the generator 3 is adjusted. That is, the rotation speed of the generator 3 is adjusted, and the power is transmitted to the engine 11 through the first sun gear 1, the first planet gear 5 and the planet carrier 4, so that the engine 11 can be driven to start.
In addition, the generator 3 can adjust the rotation speed and load of the engine 11. For example, in the engine driving mode or the combined driving mode of the engine and the driving motor, since the generator 3 can be in power connection with the engine 11 through the first sun gear 1, the first planet gear 5 and the planet carrier 4, the generator 3 can adjust the rotating speed and the load of the engine 11 accordingly according to the control of the control unit of the vehicle, so that the engine 11 can always work in the high-efficiency region, and the stepless speed regulation of the engine 11 can be realized, thereby widening the working range of the engine.
In addition, in an embodiment, the power driving system further comprises a driving motor 9, so that the power driving system is used as a hybrid power driving system, and thus, the application range of the power driving system can be improved. Of course, the drive motor 9 may drive the wheels of the vehicle alone, or may be combined with the power of the engine 11 to drive the wheels of the vehicle.
In addition, due to the inclusion of the drive motor 9, the power drive system is capable of at least two modes: the system comprises a pure electric drive mode, an engine and drive motor combined drive mode, a brake feedback working mode and a parking power generation working mode. Thus, the power drive system can meet various requirements of hybrid drive.
In addition, the power drive system may include various types, for example, one type in which the engine 11, the generator 3, and the planetary gear transmission form a front-drive hybrid assembly 12 and yet another one of the first power transmission connection, the second power transmission connection, and the third power transmission connection is a power output portion of the front-drive hybrid assembly 12, yet another one of the first power transmission connection, the second power transmission connection, and the third power transmission connection may be power-transmission connected to a reduction gear set 14, and the reduction gear set 14 may be power-transmission connected to a differential 15, with reference to fig. 16; the driving motor 9 is used for forming a rear-drive pure electric assembly 13. In this way, a four-wheel drive hybrid drive system can be constructed from the front-drive hybrid assembly 12 and the rear-drive electric-only assembly 13. In the four-wheel drive hybrid power driving system, the front wheel and the rear wheel are mutually matched through the planetary gear transmission device, so that the engine can work in a high-efficiency area all the time, the power is strong, the structure is compact, the number of parts is small, and the cost is low.
Alternatively, as shown in fig. 2, 3, 7, 8, 9, 10, 11 and 14, one of the first power transmission connection portion, the second power transmission connection portion and the third power transmission connection portion is directly power-transmitted to the driving motor 9 and then power-transmitted to the reduction gear set 14 of the hybrid drive system, the reduction gear set 14 serves as a power output portion of the hybrid drive system, and the reduction gear set 14 may be power-transmitted to the differential 15. In this way, the output power of the drive motor 9 can be transmitted to the second sun gear 6 simultaneously with the transmission to the reduction gear set 14.
Still alternatively, in still another type, as shown in fig. 4, 5, 6, 12, 13 and 15, the driving motor 9 and one of the first power transmission connecting portion, the second power transmission connecting portion and the third power transmission connecting portion are connected through a reduction gear set 14 of the hybrid drive system, and the reduction gear set 14 serves as a power output portion of the hybrid drive system. That is, the power transmission connecting portion is connected to the reduction gear set 14, and the driving motor 9 is connected to the reduction gear set 14.
In addition, in the power drive system, the power drive system includes any one of the following modes: the first method is as follows: as shown in fig. 3, 4, 5, 6, 8, 12, the engine 11 and the generator 3 are located on one side of the planetary gear transmission, and the driving motor 9 is located on the other side of the planetary gear transmission, in which case, the engine 11, the generator 3, and the driving motor 9 may or may not be coaxially arranged; the second method comprises the following steps: as shown in fig. 7, the engine 11 and the driving motor 9 are located on one side of the planetary gear transmission, and the generator 3 is located on the other side of the planetary gear transmission, in this case, the engine 11, the generator 3 and the driving motor 9 may be coaxially arranged, or may not be coaxially arranged; the third method comprises the following steps: as shown in fig. 9 to 11, the engine 11 is located on one side of the planetary gear transmission, and at least one of the drive motor 9 and the generator 3 is arranged around the planetary gear transmission; in this way, the internal space of the driving motor 9 and/or the generator 3 can be fully utilized, so that the hybrid driving system has a more compact structure and occupies less space. The method is as follows: as shown in fig. 13, the engine 11 is located on one side of the planetary gear transmission, the generator 3 is located on the other side of the planetary gear transmission, and the drive motor 9 is disposed on the radial side of the planetary gear transmission; the fifth mode is as follows: as shown in fig. 14 and 15, the engine 11 is located on one side of the planetary gear transmission, the driving motor 9 and the generator 3 are located on the other side of the planetary gear transmission, and further, the output shaft of the generator 3 passes through the central axis of the driving motor 9, that is, the output shaft of the driving motor 9 is a hollow shaft, and the output shaft of the engine 3 passes through the hollow shaft and is in power transmission connection with the first support shaft 2.
Finally, the invention provides a vehicle provided with a power drive system as described in any of the above, for example a hybrid drive system.
The mode of the hybrid drive system is described in detail below.
Take the hybrid drive system of fig. 3-15 as an example, wherein, in fig. 17-22, the E-engine, G-generator, MG-drive motor, P-planetary gear, R-reduction gear set, T-transmission, W-wheel. In the pure electric drive mode shown in fig. 17, when the vehicle starts or runs at a low speed, if the battery power is sufficient, the vehicle runs in the pure electric drive mode, at this time, the engine is not started, the generator is in an idle-load follow-up state, the power of the drive motor is transmitted to the wheels through the reduction gear set, the differential, the left half shaft, the right half shaft and the like, and the drive motor alone provides the power required by the vehicle running. In the engine driving mode shown in fig. 18, the driving motor is in the idle-load follow-up state, the engine drives the vehicle alone, the generator can be in the power generation state or in the driving state, and the generator also has the function of adjusting the engine speed, so that the engine works in the optimal working area, and the planetary gear transmission has the function of steplessly adjusting the engine speed ratio. In the engine and driving motor combined driving mode shown in fig. 19, the engine and driving motor are combined to drive the vehicle, the generator is in a power generation or driving state, and the working state of the engine is adjusted according to the actual working condition. In the brake feedback operation mode shown in fig. 20, the engine is not operated and the motor generates power by feedback. In the stop power generation operation mode shown in fig. 21, the vehicle is in a stopped state, the drive motor is not operated, and the engine generates power from the generator through the planetary gear transmission. In the reverse mode of operation shown in fig. 22, reverse of the vehicle is accomplished by the drive motor, with the engine not started and the generator in an idle-following state.
Take the hybrid drive system of fig. 16 as an example, wherein, in fig. 23-28, the E-engine, G-generator, MG-drive motor, P-planetary gear, R-reduction gear set, T-transmission, FW-front wheels, RW-rear wheels. In the pure electric drive mode shown in fig. 23, when the vehicle starts or runs at a low speed, if the battery power is sufficient, the vehicle runs in the pure electric drive mode, at this time, the engine is not started, the generator is in an idle-load follow-up state, the power of the drive motor of the rear-drive pure electric drive assembly is transmitted to the rear wheels of the vehicle through the reduction gear set, the differential, the left half shaft, the right half shaft and the like, and the drive motor of the vehicle solely provides the power required for running. In the engine driving mode shown in fig. 24, the driving motor is in the idle-load follow-up state, the engine drives the vehicle alone, the generator can be in the power generation state or in the driving state, and the generator also has the function of adjusting the engine speed, so that the engine operates in the optimal operating region, and the power distribution mechanism has the function of adjusting the engine speed ratio steplessly. In the engine and driving motor combined driving mode shown in fig. 25, the engine and driving motor are combined to drive the vehicle, the generator is in a power generation or driving state, and the operating state of the engine is adjusted according to the actual operating condition. In the brake feedback operation mode shown in fig. 26, the engine is not operated and the motor is driven to generate electric power by feedback. In the stop power generation mode shown in fig. 27, the vehicle is in a stopped state, the drive motor is not operated, and the engine generates power for the generator through the planetary gear transmission. In the reverse mode of operation shown in fig. 28, reverse of the vehicle is accomplished by the drive motor, with the engine not started and the generator in an idle follow-up condition.
The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.
It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. The invention is not described in detail in order to avoid unnecessary repetition.
In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.

Claims (17)

1. A planetary gear transmission, comprising:
a first sun gear (1), the first sun gear (1) being disposed on a first support shaft (2), the first support shaft (2) including a first power transfer connection;
a planet carrier (4), the planet carrier (4) comprising a third power transfer connection;
a first planet wheel (5), wherein the first planet wheel (5) is rotatably arranged on the planet carrier (4) and is meshed with the first sun wheel (1);
a second sun gear (6), the second sun gear (6) being disposed on a second support shaft (7), the second support shaft (7) including a second power transfer connection;
a second planet wheel (8), the second planet wheel (8) being rotatably arranged on the planet carrier (4) and meshing with the first planet wheel (5) and the second sun wheel (6).
2. A planetary gearing according to claim 1, characterized in that the second planet wheels (8) have a predetermined length extending in the axial direction to enable the second sun wheel (6) to be adjusted in the axial direction to a desired meshing position.
3. An epicyclic gearing arrangement according to claim 1, wherein said first power transfer connection is a generator connection for driving connection with a generator;
the second power transmission connecting part is a driving motor connecting part which is used for being in transmission connection with a driving motor (9);
the third power transmission connecting part is an engine connecting part which is used for being in transmission connection with an engine.
4. A planetary gear transmission according to any one of claims 1-3, wherein the planet carrier (4) comprises a planet carrier central shaft (10), a plurality of first planet wheel supporting shafts (41) connected to the planet carrier central shaft (10) and circumferentially spaced apart, and a plurality of second planet wheel supporting shafts (42) connected to each of the first planet wheel supporting shafts (41), respectively, one end of each of the second planet wheel supporting shafts (42) being connected to each of the first planet wheel supporting shafts (41) through a radial connecting portion (43) at the same end of the first planet wheel (5) and the second planet wheel (8) in the axial direction;
each first planet wheel (5) is arranged on each first planet wheel supporting shaft (41), and each second planet wheel (8) is arranged on each second planet wheel supporting shaft (42).
5. A planetary gearing according to any one of claims 1-3, characterized in that the first support shaft (2) is a hollow shaft, from which the planet carrier central shaft (10) of the planet carrier (4) axially protrudes,
the first power transmission connecting part and a third power transmission connecting part of the planet carrier central shaft (10) are positioned on the same side of the planet carrier (4);
the second power transmission connecting part is positioned on the other side of the planet carrier (4).
6. A planetary gearing according to any one of claims 1-3, characterized in that said second support shaft (7) is a hollow shaft from which the planet carrier central shaft (10) of said planet carrier (4) axially protrudes,
the second power transmission connecting part and a third power transmission connecting part of the planet carrier central shaft (10) are positioned on the same side of the planet carrier (4);
the first power transmission connecting part is positioned on the other side of the planet carrier (4).
7. A planetary gearing according to any one of claims 1-3, characterized in that said second support shaft (7) is a hollow shaft from which said first support shaft (2) axially protrudes, wherein,
the first power transmission connecting part and the second power transmission connecting part are positioned on one side of the planet carrier (4);
the third power transmission connecting portion of the planet carrier central shaft (10) of the planet carrier (4) is located on the other side of the planet carrier (4).
8. A power drive system, characterized by comprising an engine (11), a generator (3) and a planetary gear transmission according to any one of claims 1-7, wherein,
one of the first power transmission connection part, the second power transmission connection part and the third power transmission connection part is in transmission connection with the engine (11);
the other of the first power transmission connection portion, the second power transmission connection portion and the third power transmission connection portion is in transmission connection with the generator (3).
9. A power drive system according to claim 8, characterized in that the starting of the engine (11) is effected by means of the planetary gear and by regulating the rotational speed of the generator (3).
10. A power drive system according to claim 9, characterized in that the generator (3) is capable of regulating the speed and load of the engine (11).
11. A power drive system according to claim 8, characterized in that the power drive system further comprises a drive motor (9).
12. A power drive system according to claim 11 wherein the power drive system is capable of at least two of the following modes: the system comprises a pure electric drive mode, an engine and drive motor combined drive mode, a brake feedback working mode and a parking power generation working mode.
13. A power drive system according to claim 11, characterized in that the engine (11), the generator (3) and the planetary gear transmission form a forward-drive hybrid assembly (12), and that a further one of the first, second and third power transmission connections is a power take-off of the forward-drive hybrid assembly (12);
the driving motor (9) is used for forming a rear-drive pure electric assembly (13).
14. A power drive system according to claim 11, wherein one of the first power transmission connection portion, the second power transmission connection portion and the third power transmission connection portion is directly power-transmitted to the drive motor (9) and then power-transmitted to a reduction gear set (14) of a power drive system, and the reduction gear set (14) serves as a power output portion of the power drive system.
15. A power drive system in accordance with claim 11, characterized in that the drive motor (9) and one more of the first power transmission connection portion, the second power transmission connection portion, and the third power transmission connection portion are connected through a reduction gear set (14) of a power drive system, the reduction gear set (14) serving as a power output portion of the power drive system.
16. A power drive system according to any one of claims 11 to 15 wherein the power drive system includes any one of:
the first method is as follows: the engine (11) and the generator (3) are positioned on one side of the planetary gear transmission, and the driving motor (9) is positioned on the other side of the planetary gear transmission;
the second method comprises the following steps: the engine (11) and the driving motor (9) are positioned on one side of the planetary gear transmission, and the generator (3) is positioned on the other side of the planetary gear transmission;
the third method comprises the following steps: the engine (11) is located on one side of the planetary gear transmission around which at least one of the drive motor (9) and the generator (3) is arranged;
the method is as follows: the engine (11) is positioned on one side of the planetary gear transmission, the generator (3) is positioned on the other side of the planetary gear transmission, and the driving motor (9) is arranged on the radial side of the planetary gear transmission;
the fifth mode is as follows: the engine (11) is located on one side of the planetary gear transmission, and the driving motor (9) and the generator (3) are located on the other side of the planetary gear transmission.
17. A vehicle characterized in that the vehicle is provided with a power drive system according to any one of claims 8-16.
CN202010850475.5A 2020-08-21 2020-08-21 Planetary gear transmission, power drive system and vehicle Active CN114076180B (en)

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US20090111641A1 (en) * 2007-10-29 2009-04-30 Hyundai Motor Company Rear wheel drive apparatus for four wheel drive (4WD) hybrid electric vehicle
DE102008059979A1 (en) * 2008-12-02 2010-06-10 Magna Powertrain Ag & Co Kg Lockable differential gearbox unit for use as central differential in drive train of motor vehicle, has step-up gear causing rotating motion of primary and secondary parts of clutch relative to each other during rotation of output elements
CN101920651A (en) * 2010-07-20 2010-12-22 吉林大学 Double planet row-type hydraulic driving series-parallel hybrid electric system
CN106979286A (en) * 2017-05-19 2017-07-25 福建万润新能源科技有限公司 A kind of dry friction external control four-speed gear shift device
CN109130832A (en) * 2018-09-19 2019-01-04 张石静 A kind of no gear ring hybrid power coupler
CN109849639A (en) * 2019-04-02 2019-06-07 吴燕开 A kind of electric drive transmission device for automotive power
CN209479405U (en) * 2018-12-29 2019-10-11 杭州登腾科技有限公司 A kind of hybrid gearbox and hybrid vehicle
CN110816253A (en) * 2019-11-20 2020-02-21 奇瑞汽车股份有限公司 Gear ring-free planetary gear train hybrid power system

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090111641A1 (en) * 2007-10-29 2009-04-30 Hyundai Motor Company Rear wheel drive apparatus for four wheel drive (4WD) hybrid electric vehicle
DE102008059979A1 (en) * 2008-12-02 2010-06-10 Magna Powertrain Ag & Co Kg Lockable differential gearbox unit for use as central differential in drive train of motor vehicle, has step-up gear causing rotating motion of primary and secondary parts of clutch relative to each other during rotation of output elements
CN101920651A (en) * 2010-07-20 2010-12-22 吉林大学 Double planet row-type hydraulic driving series-parallel hybrid electric system
CN106979286A (en) * 2017-05-19 2017-07-25 福建万润新能源科技有限公司 A kind of dry friction external control four-speed gear shift device
CN109130832A (en) * 2018-09-19 2019-01-04 张石静 A kind of no gear ring hybrid power coupler
CN209479405U (en) * 2018-12-29 2019-10-11 杭州登腾科技有限公司 A kind of hybrid gearbox and hybrid vehicle
CN109849639A (en) * 2019-04-02 2019-06-07 吴燕开 A kind of electric drive transmission device for automotive power
CN110816253A (en) * 2019-11-20 2020-02-21 奇瑞汽车股份有限公司 Gear ring-free planetary gear train hybrid power system

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