CN112224006A - Three-gear parallel shaft type double-motor three-planet-row hybrid power system - Google Patents

Three-gear parallel shaft type double-motor three-planet-row hybrid power system Download PDF

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Publication number
CN112224006A
CN112224006A CN202010882229.8A CN202010882229A CN112224006A CN 112224006 A CN112224006 A CN 112224006A CN 202010882229 A CN202010882229 A CN 202010882229A CN 112224006 A CN112224006 A CN 112224006A
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CN
China
Prior art keywords
gear
shaft
planet
limp
hollow shaft
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Pending
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CN202010882229.8A
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Chinese (zh)
Inventor
陆祖汉
张松
陈涛
杨军
毛正松
林志强
王皓
吴苾曜
曾强
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Guangxi Yuchai Machinery Co Ltd
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Guangxi Yuchai Machinery Co Ltd
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Application filed by Guangxi Yuchai Machinery Co Ltd filed Critical Guangxi Yuchai Machinery Co Ltd
Priority to CN202010882229.8A priority Critical patent/CN112224006A/en
Priority to PCT/CN2020/133357 priority patent/WO2022041545A1/en
Publication of CN112224006A publication Critical patent/CN112224006A/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • 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
    • B60K6/22—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
    • B60K6/40—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 assembly or relative disposition of components
    • 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
    • B60K6/445—Differential gearing distribution 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)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Hybrid Electric Vehicles (AREA)
  • Structure Of Transmissions (AREA)

Abstract

The invention discloses a three-gear parallel shaft type double-motor three-planet-row hybrid power system. The invention comprises an engine, a flexible connector, a shell, a central shaft, a first hollow shaft, a second hollow shaft, an output front shaft, an output rear shaft, a first planet row, a second planet row and a third planet row; the central shaft, the first hollow shaft, the second hollow shaft, the output front shaft, the first planet row, the second planet row, the third planet row, the first motor and the second motor are all arranged in the shell, the first hollow shaft is sleeved on the central shaft, and the second hollow shaft is sleeved on the first hollow shaft. The invention aims to solve the problems that the highest rotating speed of a motor in the existing hybrid power assembly system is lower, the peak torque is larger and the cost of the motor is high; the axial length is large, the requirement on the arrangement space is high, and the adaptability of the vehicle type is poor.

Description

Three-gear parallel shaft type double-motor three-planet-row hybrid power system
Technical Field
The invention relates to the technical field of power systems, in particular to a three-gear parallel shaft type double-motor three-planet-row hybrid power system.
Background
The quality of the running performance of the vehicle depends not only on the engine but also on the transmission and the rationality of the matching of the transmission and the engine. The automobile speed variator can adapt to different requirements of automobile starting, accelerating and overcoming various obstacles on traction force of driving wheels and speed of the automobile, along with the development of science and technology, the stepless speed variator is an ideal transmission system of the automobile, has the capability of continuously changing transmission ratio, and can theoretically enable an engine to always run in an ideal working interval so as to improve the dynamic property and the economical efficiency of the automobile.
Simple planetary gear mechanisms are the basis of speed change mechanisms, and the speed change mechanisms of the conventional automatic transmissions are composed of two or more rows of planetary gear mechanisms. In a simple planetary gear mechanism, a sun gear is positioned at the center of the planetary gear mechanism, the sun gear and the planet gears are in constant mesh, and the meshing rotating directions of the two outer gears are opposite. Just as the sun is located at the center of the solar system, the sun gear is so named for its location. Besides the rotation of the planet wheels around the supporting shaft of the planet carrier, under some working conditions, the planet wheels can rotate around the central axis of the sun wheel under the driving of the planet carrier, like the rotation of the earth and the revolution around the sun, and when the condition occurs, the transmission mode of the action of the planetary gear mechanism is called.
Therefore, the planetary gear mechanism has the characteristic of multiple degrees of freedom, and two motors are additionally utilized in a hybrid power assembly system to limit the degrees of freedom. The rotating speed and the torque of the engine are completely decoupled through the two motors, so that the working point of the engine can be freely controlled, stepless speed change is realized, and the fuel economy of a hybrid power assembly system is improved to the maximum extent.
At present, two or more planetary gear trains are adopted to be combined in the market, and although the structure combination of the hybrid power system is more free by adopting the plurality of planetary gear trains, the configuration of the hybrid power system is complex and diversified, and the complexity and the diversity of influencing factors of the power flow direction in the system and the efficiency of the system are increased. For example, in the existing new energy city public transport bus, the applied planet row hybrid power assembly system is mainly a coaxial arrangement scheme of double motors and double planet rows, and the following problems mainly exist:
1. the highest rotating speeds of the two driving motors are low, the peak torque is large, and the motor cost is high;
2. the coaxial arrangement scheme causes the power assembly to have larger axial length, high requirement on arrangement space and poor adaptability to vehicle types;
3. the engine direct drive vehicle can be only applied to urban buses and cannot be adapted to long-distance buses simultaneously, although the engine direct drive vehicle can be realized, the application probability of the engine direct drive vehicle is very low, and the vehicle type adaptability is poor.
4. Due to the limitation of gears, the device cannot be applied to vehicle types with large power and torque requirements, and the vehicle type adaptability is poor.
Disclosure of Invention
Aiming at the problems, the invention provides a three-gear parallel shaft type double-motor three-planet-row hybrid power system, aiming at solving the problems that the highest rotating speed of a motor is lower, the peak torque is larger and the motor cost is high in the existing hybrid power system; the axial length of the assembly is large, and the adaptability of the vehicle type is poor.
The invention adopts the following technical scheme to realize the purpose:
a three-gear parallel shaft type double-motor three-planet-row hybrid power system comprises an engine, a flexible connector, a shell, a central shaft, a first hollow shaft, a second hollow shaft, an output front shaft, an output rear shaft, a first planet row, a second planet row and a third planet row;
the central shaft, the first hollow shaft, the second hollow shaft, the output front shaft, the first planet row, the second planet row, the third planet row, the first motor and the second motor are all arranged in the shell;
the first hollow shaft is sleeved on the central shaft, and the second hollow shaft is sleeved on the first hollow shaft;
the output end of the engine is in transmission connection with the central shaft through a flexible connector;
the central shaft is in transmission connection with the first hollow shaft through a first planet row, the first planet row comprises a first sun wheel, a first planet wheel and a first planet carrier, the central shaft is coaxially and fixedly connected with the first planet carrier, the first sun wheel is fixedly arranged on the first hollow shaft, the first planet wheel is arranged on the first planet carrier, and the first planet wheel is respectively meshed with the first sun wheel and the gear ring;
the second planet row comprises a second sun gear, a second planet gear and a second planet carrier, the second sun gear is fixedly arranged on the second hollow shaft, the second planet carrier is fixedly arranged on the shell, the second planet gear is arranged on the second planet carrier, and the second planet gear is respectively meshed with the second sun gear and the gear ring;
the third planet row comprises a third sun gear, a third planet wheel and a third planet carrier, the gear ring and the third sun gear are in transmission through an output front shaft, the outer gear ring is fixedly arranged on the shell, the third planet wheel is arranged on the third planet carrier, the third planet wheel is respectively meshed with the outer gear ring and the third sun gear, the third planet carrier is in transmission connection with a main speed reducer through an output rear shaft, and the main speed reducer is in transmission connection with a left wheel and a right wheel through a left half shaft and a right half shaft respectively;
a third gear sleeve is arranged between the first hollow shaft and the central shaft;
the first hollow shaft is in transmission connection with an output shaft of the first motor through a first reduction gear;
and the output shaft of the second motor is in transmission connection with the second hollow shaft through a speed reducing mechanism.
Furthermore, the speed reducing mechanism comprises a first gear sleeve, a second gear sleeve, a speed reducing shaft, a front row of speed reducing gears, a middle speed reducing gear and a rear row of speed reducing gears, wherein the front row of speed reducing gears, the middle speed reducing gear and the rear row of speed reducing gears are coaxially arranged on the speed reducing shaft; the transmission ratios of the front row reduction gear, the middle reduction gear and the rear row reduction gear are different;
the outer ring of the second hollow shaft is sleeved with a first hollow shaft gear, a second hollow shaft second gear and a second hollow shaft third gear which are meshed with the front row reduction gear, the middle reduction gear and the rear row reduction gear; the first gear sleeve and the second gear sleeve are in transmission connection with the second hollow shaft and can axially slide along the second hollow shaft; the first gear sleeve is arranged between the first gear of the second hollow shaft and the second gear of the second hollow shaft, and the second gear sleeve is arranged on one side of the third gear of the second hollow shaft.
Further, the system further comprises a limp input shaft, a limp output shaft, a central shaft first gear;
the limp input shaft, the limp output shaft and the central shaft first gear are all arranged in the shell;
the central shaft first gear is arranged on the central shaft;
the limp input shaft is arranged in parallel with the central shaft, and is in transmission connection with the central shaft through a first gear of the central shaft;
the limp output shaft and the limp input shaft are coaxially arranged, and a fifth gear sleeve is arranged between the limp output shaft and the limp input shaft;
the limp output shaft is in transmission connection with the second hollow shaft through one of a limp output shaft second gear or a limp output shaft third gear, and the limp output shaft second gear and the limp output shaft third gear are sleeved on the limp output shaft;
the limping output shaft is also provided with a fourth gear sleeve which can axially slide along the limping output shaft; the fourth gear sleeve is arranged between the second gear of the limp output shaft and the third gear of the limp output shaft.
Furthermore, the first gear sleeve and the second gear sleeve are in splined connection with the second hollow shaft, and the fourth gear sleeve is in splined connection with the limp output shaft. This ensures reliable and synchronous connections between them.
The invention has the beneficial effects that:
1. according to the three-gear parallel shaft type double-motor three-planet-row hybrid power system provided by the invention, the peak torque of a double-drive motor can be reduced, the size of the motor is obviously reduced, the cost of the drive motor can be reduced, and the core competitiveness of the scheme can be improved from the cost;
2. according to the three-gear parallel shaft type double-motor three-planet-row hybrid power system, the double motors are arranged in a parallel shaft mode, the axial size of a power assembly can be greatly reduced, and the arrangement mode is more flexible in a limited installation space of a bus;
3. according to the three-gear parallel shaft type double-motor three-planet-row hybrid power system, in a double-planet-row parallel connection scheme and each driving mode of planet row output, the mode with the highest transmission efficiency is that an engine directly drives a vehicle, and in order to improve the transmission efficiency of the system, the multi-purpose engine directly drives the vehicle, so that a third gear sleeve is connected with a first hollow shaft, the direct driving of the engine can be realized, and the fuel saving rate of a whole vehicle system is improved;
4. according to the three-gear parallel shaft type double-motor three-planet-row hybrid power system, the third gear sleeve is connected with the central shaft, so that the double motors can drive the vehicle in a pure electric driving mode together, and compared with the pure electric driving of other planet row schemes that only a single motor works, the scheme can reduce the torque and the power of the second motor and reduce the system cost;
5. the invention provides a three-gear parallel shaft type double-motor three-planet-row hybrid power system which can be suitable for different vehicle types and can be used in the fields of urban buses, highway buses, coaches, new energy trucks, new energy automobiles and the like.
Drawings
FIG. 1 is a schematic structural diagram of a three-gear parallel shaft type double-motor three-planet-row hybrid power system.
Fig. 2 is a schematic structural diagram of a three-gear parallel shaft type dual-motor three-planet-row hybrid power system with a limp module.
In the figure: 100-an engine; 200-a flexible connector; 300-a housing; 301-central axis first gear; 302-limp input shaft; 303-fifth gear sleeve; 304-limp output shaft; 305-limp output shaft second gear; 306-a fourth gear sleeve; 307-limp output shaft third gear; 308-front row reduction gear; 309-intermediate reduction gear; 310-rear row reduction gear; 311-a ring gear; 312-third planet row; 313 — output rear axle; 314-output front axle; 315-first carrier; 316-second planet carrier; 317-second gear sleeve; 318-second hollow shaft third gear; 319-second hollow shaft; 320-a second hollow shaft second gear; 321-a first gear sleeve; 322-second hollow shaft first gear; 323-first reduction gear; 324-a first hollow shaft; 325-third gear sleeve; 326-central axis; 327-a first sun gear; 328-a first planet; 329-a second sun gear; 330-second planet; 331-a first hollow shaft first gear; 332-central shaft second gear; 333-first hollow shaft second gear; 334-limp input first gear; 335-limp input second gear; 336-limp output shaft first gear; 337-outer gear ring; 401-a second electric machine; 402-a first electric machine; 500-main reducer; 601-left half shaft; 602-right half shaft; 701-left wheel; 702-a right wheel; 800-deceleration shaft.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1 and fig. 2, for an embodiment of the present invention, a three-gear parallel shaft type dual-motor three-planetary-row hybrid power system is provided, which includes an engine 100, a flexible connector 200, a housing 300, a central shaft 326, a first hollow shaft 324, a second hollow shaft 319, an output front shaft 314, an output rear shaft 313, a first planetary row, a second planetary row, and a third planetary row;
the central shaft 326, the first hollow shaft 324, the second hollow shaft 319, the output front shaft 314, the first planet row, the second planet row, the third planet row, the first motor 402 and the second motor 401 are all arranged in the shell 300;
the first hollow shaft 324 is sleeved on the central shaft 326, and the second hollow shaft 319 is sleeved on the first hollow shaft 324;
the output end of the engine 100 is in transmission connection with the central shaft 326 through the flexible connector 200;
the central shaft 326 is in transmission connection with the first hollow shaft 324 through a first planet row, the first planet row comprises a first sun gear 327, a first planet gear 328 and a first planet carrier 315, the central shaft 326 is coaxially and fixedly connected with the first planet carrier 315, the first sun gear 327 is fixedly arranged on the first hollow shaft 324, the first planet gear 328 is arranged on the first planet carrier 315, and the first planet gear 328 is respectively meshed with the first sun gear 327 and the gear ring 311;
the second planet row comprises a second sun gear 329, a second planet gear 330 and a second planet carrier 316, the second sun gear 329 is fixedly arranged on the second hollow shaft 319, the second planet carrier 316 is fixedly arranged on the shell 300, the second planet gear 330 is arranged on the second planet carrier 316, and the second planet gear 330 is respectively meshed with the second sun gear 329 and the ring gear 311;
the third planet row comprises a third sun gear, a third planet wheel and a third planet carrier, the gear ring 311 and the third sun gear are driven by an output front shaft 314, the outer gear ring 337 is fixedly arranged on the shell 300, the third planet wheel is arranged on the third planet carrier, the third planet wheel is respectively meshed with the outer gear ring 337 and the third sun gear, the third planet carrier is in transmission connection with a main speed reducer 500 by an output rear shaft 313, and the main speed reducer 500 is in transmission connection with a left wheel 701 and a right wheel 702 by a left half shaft 601 and a right half shaft 602 respectively;
a third gear sleeve 325 is arranged between the first hollow shaft 324 and the central shaft 326; the third gear sleeve 325 acts as a two-way brake, engaging with the central shaft second gear 332 or with the first hollow shaft first gear 331, to brake the central shaft 326 or the first hollow shaft 324, respectively.
The first hollow shaft 324 is in transmission connection with an output shaft of the first motor 402 through a first reduction gear 323;
the output shaft of the second motor 401 is in transmission connection with the second hollow shaft 319 through a speed reducing mechanism.
Specifically, the speed reduction mechanism in this embodiment is a three-gear speed reduction mechanism, and specifically includes a first gear sleeve 321, a second gear sleeve 317, a speed reduction shaft 800, a front row speed reduction gear 308, a middle speed reduction gear 309, and a rear row speed reduction gear 310 that are coaxially arranged on the speed reduction shaft 800; wherein, the transmission ratios of the front row reduction gear 308, the middle reduction gear 309 and the rear row reduction gear 310 are all different;
the outer ring of the second hollow shaft 319 is sleeved with a second hollow shaft first gear 322, a second hollow shaft second gear 320 and a second hollow shaft third gear 318 which are meshed with the front row reduction gear 308, the middle reduction gear 309 and the rear row reduction gear 310; the first gear sleeve 321 and the second gear sleeve 317 are in transmission connection with the second hollow shaft 319 and can axially slide along the second hollow shaft 319; the first gear sleeve 321 is disposed between the first hollow shaft gear 322 and the second hollow shaft gear 320, and the second gear sleeve 317 is disposed on one side of the third hollow shaft gear 318.
As shown in fig. 1, the first gear sleeve 321 includes three modes, the first mode is: the first gear sleeve 321 can slide leftwards to be meshed with the second hollow shaft first gear 322, and then the second hollow shaft 319 is in transmission connection with the second motor 401 through the front row reduction gear 308, so that first-gear reduction transmission is realized; the second method is as follows: the first gear sleeve 321 can slide rightwards to be meshed with the second hollow shaft second gear 320, and then the second hollow shaft 319 is in transmission connection with the second motor 401 through the intermediate reduction gear 309, so that the second-gear reduction transmission is realized; the third is: the first gear sleeve 321 remains in place.
As shown in fig. 1, the second gear set 317 includes two modes: the first method is as follows: the second gear sleeve 317 slides leftwards to be meshed with a second hollow shaft third gear 318, and then the second hollow shaft 319 is in transmission connection with the second motor 401 through a rear row reduction gear 310, so that third-gear reduction transmission is realized; the second method is as follows: the second gear sleeve 317 remains in place.
Therefore, the system of the present embodiment has the following operation modes:
(1) electric only mode
When the third gear sleeve 325 is slid into engagement with the central shaft second gear 332, the external splines of the third gear sleeve 325 are simultaneously engaged with the housing, thereby forming a stop for the central shaft 326. At this time, the system drives the vehicle in a pure electric drive mode by the double motors of the first motor 402 and the second motor 401, and compared with the situation that only one motor can work during pure electric drive of other planetary row schemes, the scheme can reduce the torque and the power of the first motor 402 and reduce the system cost.
(2) Engine only mode
When the third gear sleeve 325 is disengaged from the central shaft second gear 332, it slides into engagement with the first hollow shaft first gear 331 while the external splines of the third gear sleeve 325 are connected to the housing, thereby forming a brake on the first hollow shaft 324. At this moment, the engine 100 directly drives the vehicle, and the mode improves the use probability that the engine directly drives the whole vehicle to run, so that the transmission efficiency of a power assembly system is higher, the fuel consumption of the system is reduced, the fuel saving rate of the whole vehicle system is improved, and the system can be simultaneously used for urban buses and long-distance high-speed buses.
(3) Hybrid drive mode
In this mode, neither the third gear sleeve 325 nor the central shaft second gear 332, nor the first hollow shaft first gear 331, are engaged, i.e., neither the central shaft 326 nor the first hollow shaft 324 is braked. At this time, the entire vehicle is driven by the engine 100 and the second motor 401 in a hybrid manner, and the first motor 402 generates electric power.
(4) Regenerative braking
When braking is performed, braking energy may be recovered by the second motor 401, or both the first motor 402 and the second motor 401. That is, the second motor 401 controls the front reduction gear 308, the middle reduction gear 309 and the rear reduction gear 310 on the reduction shaft 800 to correspond to the high, middle and low three-gear reduction respectively, and the second hollow shaft 319 and the second sun gear 329 are linked, so that different torques can be output by selecting three different gears.
Therefore, the scheme of the invention can reduce the peak torque of the dual-drive motor, obviously reduce the size of the motor and reduce the cost of the drive motor; the axial size of the power assembly can be greatly reduced, and the arrangement mode is more flexible in a limited installation space of a bus; the direct drive of the engine can be realized, and the fuel saving rate of the whole vehicle system is improved; meanwhile, the scheme can reduce the torque and the power of the second motor and reduce the system cost; the automobile can be suitable for different automobile types, and can be used in the fields of urban buses, highway buses, coaches, new energy trucks, new energy automobiles and the like.
The embodiment exemplarily shows a three-gear speed reduction structure composed of a front row speed reduction gear 308, a middle speed reduction gear 309 and a rear row speed reduction gear 310, and according to other embodiments or practical applications, the speed reduction structure can also be set to first gear, second gear or more than third gear.
As shown in fig. 2, in other embodiments, the system further comprises a limp input shaft 302, a limp output shaft 304, a central shaft first gear 301;
the limp input shaft 302, the limp output shaft 304 and the central shaft first gear 301 are all arranged in the shell 300;
the central shaft first gear 301 is arranged on the central shaft 326;
the limp home input shaft 302 is arranged in parallel with a central shaft 326, and the limp home input shaft 302 is in transmission connection with the central shaft 326 through a central shaft first gear 301;
the limp output shaft 304 and the limp input shaft 302 are coaxially arranged, and a fifth gear sleeve 303 is arranged between the limp output shaft 304 and the limp input shaft 302; the fifth gear sleeve 303 is simultaneously meshed with the limp input second gear 335 and the limp output shaft first gear 336, so that the limp output shaft 304 and the limp input shaft 302 synchronously rotate.
The limp output shaft 304 is in transmission connection with the second hollow shaft 319 through one of a limp output shaft second gear 305 and a limp output shaft third gear 307, and the limp output shaft second gear 305 and the limp output shaft third gear 307 are sleeved on the limp output shaft 304;
the limp output shaft 304 is also provided with a fourth gear sleeve 306 which can axially slide along the limp output shaft 304; the fourth gear sleeve 306 is disposed between the limp output shaft second gear 305 and the limp output shaft third gear 307.
As shown in fig. 2, the fourth gear sleeve 306 includes three modes: the first method is as follows: the fourth gear sleeve 306 can slide leftwards to be meshed with the limp output shaft second gear 305, so that a limp advance mode is realized; the second method is as follows: the fourth gear sleeve 306 slides rightwards to be meshed with the third gear 307 of the limp output shaft, so that a limp retreating mode can be realized; the third is: the fourth gear sleeve 306 remains stationary in place.
In addition to the operation modes of the above embodiments, the following specific operation modes are also available in this embodiment:
(1) limp forward mode
The power path in this mode is: the power of the engine 100 is meshed with the limp input first gear 334 through the central shaft first gear 301, transmitted to the limp input shaft 302, then is input to the limp output shaft 304 through the power of the fifth gear sleeve 303, is meshed with the front row reduction gear 308 through the limp output shaft second gear 305 on the limp output shaft 304, and is meshed with the front row reduction gear 308 and the second hollow shaft first gear 322, so that the power is transmitted into the second hollow shaft 319 to drive the whole vehicle to move forward, and therefore the limp forward mode is achieved.
(2) Limp back mode
The power route of the mode is as follows: the power of the engine 100 is meshed with the limp home input first gear 334 through the central shaft first gear 301, transmitted to the limp home input shaft 302, and then is input to the limp home output shaft 304 through the fifth gear sleeve 303, and then the limp home output shaft third gear 307 on the limp home output shaft 304 is in transmission connection with the second hollow shaft second gear 320 through the intermediate reduction gear 309, and at the moment, the power is input to the second hollow shaft 319, so that the limp home mode is realized.
(3) Mechanical power take-off mode
The power path for this mode is as follows: the power of the engine 100 is meshed with the limp input first gear 334 through the central shaft first gear 301, transmitted to the limp input shaft 302, and then input to the limp output shaft 304 through the power of the fifth gear sleeve 303 to be output, so that the mechanical power taking mode is realized.
(4) Electric power takeoff mode
The mode is as follows: the output end of the second motor 401 is in transmission connection with the limp output shaft second gear 305 through the front row reduction gear 308 by the power provided by the second motor 401, so that the power is transmitted to the limp output shaft 304, and therefore the electric power taking mode is realized.
Further, the first gear sleeve 321, the second gear sleeve 317 and the second hollow shaft 319 are in spline connection, and the fourth gear sleeve 306 and the limp output shaft 304 are in spline connection. This ensures reliable and synchronous connections between them.
Additionally, in some embodiments, the first motor 402 and the first hollow shaft 324 may be drivingly connected by one of a chain or a belt.
In other embodiments, the first gear sleeve 321, the second gear sleeve 317, the third gear sleeve 325, the fourth gear sleeve 306 and the fifth gear sleeve 303 can all realize sliding switching in an electric control manner.
The system provided by the invention adopts the arrangement of double motors in parallel shafts, and is respectively connected with different planet row sun gears through the speed reducing mechanisms, so that the axial length of the power assembly can be greatly reduced, the arrangement space of the power assembly is reduced, and the application range of the power assembly to different vehicle types is improved. By designing the connection mode of the double planetary rows and the engine, the use probability of the engine for directly driving the whole vehicle to run is improved, the transmission efficiency of a power assembly system is higher, and the fuel consumption of the system is reduced. The double planetary rows share the gear ring, so that the power of the engine can be decoupled, one part of the power is transmitted to the rear axle, and the other part of the power is transmitted to the first motor for power generation. And the use requirements of different working conditions are met by switching different modes.

Claims (4)

1. A three-gear parallel shaft type double-motor three-planet-row hybrid power system is characterized by comprising an engine (100), a flexible connector (200), a shell (300), a central shaft (326), a first hollow shaft (324), a second hollow shaft (319), an output front shaft (314), an output rear shaft (313), a first planet row, a second planet row and a third planet row;
the central shaft (326), the first hollow shaft (324), the second hollow shaft (319), the output front shaft (314), the first planet row, the second planet row, the third planet row, the first motor (402) and the second motor (401) are all arranged in the shell (300);
the first hollow shaft (324) is sleeved on the central shaft (326), and the second hollow shaft (319) is sleeved on the first hollow shaft (324);
the output end of the engine (100) is in transmission connection with the central shaft (326) through a flexible connector (200);
the central shaft (326) is in transmission connection with the first hollow shaft (324) through a first planet row, the first planet row comprises a first sun gear (327), a first planet gear (328) and a first planet carrier (315), the central shaft (326) is coaxially and fixedly connected with the first planet carrier (315), the first sun gear (327) is fixedly arranged on the first hollow shaft (324), the first planet gear (328) is arranged on the first planet carrier (315), and the first planet gear (328) is respectively meshed with the first sun gear (327) and the gear ring (311);
the second planet row comprises a second sun gear (329), a second planet gear (330) and a second planet carrier (316), the second sun gear (329) is fixedly arranged on the second hollow shaft (319), the second planet carrier (316) is fixedly arranged on the shell (300), the second planet gear (330) is arranged on the second planet carrier (316), and the second planet gear (330) is respectively meshed with the second sun gear (329) and the gear ring (311);
the third planet row comprises a third sun gear, a third planet wheel and a third planet carrier, the gear ring (311) and the third sun gear are driven through an output front shaft (314), the outer gear ring (337) is fixedly arranged on the shell (300), the third planet wheel is arranged on the third planet carrier, the third planet wheel is respectively meshed with the outer gear ring (337) and the third sun gear, the third planet carrier is in transmission connection with the main speed reducer (500) through an output rear shaft (313), and the main speed reducer (500) is in transmission connection with a left wheel (701) and a right wheel (702) through a left half shaft (601) and a right half shaft (602);
a third gear sleeve (325) is arranged between the first hollow shaft (324) and the central shaft (326);
the first hollow shaft (324) is in transmission connection with an output shaft of a first motor (402) through a first reduction gear (323);
the output shaft of the second motor (401) is in transmission connection with a second hollow shaft (319) through a speed reducing mechanism.
2. The system of claim 1, wherein: the speed reducing mechanism comprises a first gear sleeve (321), a second gear sleeve (317), a speed reducing shaft (800), a front row speed reducing gear (308), a middle speed reducing gear (309) and a rear row speed reducing gear (310), wherein the front row speed reducing gear (308), the middle speed reducing gear (309) and the rear row speed reducing gear (310) are coaxially arranged on the speed reducing shaft (800); wherein, the transmission ratios of the front row reduction gear (308), the middle reduction gear (309) and the rear row reduction gear (310) are different;
a second hollow shaft first gear (322), a second hollow shaft second gear (320) and a second hollow shaft third gear (318) which are meshed with the front row reduction gear (308), the middle reduction gear (309) and the rear row reduction gear (310) are sleeved on the outer ring of the second hollow shaft (319); the first gear sleeve (321) and the second gear sleeve (317) are in transmission connection with the second hollow shaft (319) and can axially slide along the second hollow shaft (319); the first gear sleeve (321) is arranged between the first hollow shaft gear (322) and the second hollow shaft gear (320), and the second gear sleeve (317) is arranged on one side of the third hollow shaft gear (318).
3. The system according to claim 1 or 2, characterized in that:
the system further comprises a limp input shaft (302), a limp output shaft (304), a central shaft first gear (301);
the limp input shaft (302), the limp output shaft (304) and the central shaft first gear (301) are all arranged in the shell (300);
the central shaft first gear (301) is arranged on a central shaft (326);
the limp home running input shaft (302) is arranged in parallel with a central shaft (326), and the limp home running input shaft (302) is in transmission connection with the central shaft (326) through a central shaft first gear (301);
the limp output shaft (304) and the limp input shaft (302) are coaxially arranged, and a fifth gear sleeve (303) is arranged between the limp output shaft (304) and the limp input shaft (302);
the limp output shaft (304) is in transmission connection with the second hollow shaft (319) through one of a limp output shaft second gear (305) or a limp output shaft third gear (307), and the limp output shaft second gear (305) and the limp output shaft third gear (307) are sleeved on the limp output shaft (304);
the limp output shaft (304) is also provided with a fourth gear sleeve (306), and the fourth gear sleeve can axially slide along the limp output shaft (304); the fourth gear sleeve (306) is arranged between the limp output shaft second gear (305) and the limp output shaft third gear (307).
4. The system of claim 3, wherein the first gear sleeve (321), the second gear sleeve (317) and the second hollow shaft (319) are splined, and the fourth gear sleeve (306) and the limp output shaft (304) are splined.
CN202010882229.8A 2020-08-28 2020-08-28 Three-gear parallel shaft type double-motor three-planet-row hybrid power system Pending CN112224006A (en)

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CN202010882229.8A CN112224006A (en) 2020-08-28 2020-08-28 Three-gear parallel shaft type double-motor three-planet-row hybrid power system
PCT/CN2020/133357 WO2022041545A1 (en) 2020-08-28 2020-12-02 Three-gear parallel-shaft dual-motor three-planetary gear set hybrid power system

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Application publication date: 20210115