WO2021087946A1 - Système d'entraînement de pont à vitesse variable à deux vitesses doté d'un double embrayage - Google Patents

Système d'entraînement de pont à vitesse variable à deux vitesses doté d'un double embrayage Download PDF

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Publication number
WO2021087946A1
WO2021087946A1 PCT/CN2019/116531 CN2019116531W WO2021087946A1 WO 2021087946 A1 WO2021087946 A1 WO 2021087946A1 CN 2019116531 W CN2019116531 W CN 2019116531W WO 2021087946 A1 WO2021087946 A1 WO 2021087946A1
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WO
WIPO (PCT)
Prior art keywords
gear set
shaft
input shaft
gear
drive system
Prior art date
Application number
PCT/CN2019/116531
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English (en)
Chinese (zh)
Inventor
刘磊
黄超
柳璇
汤清
Original Assignee
舍弗勒技术股份两合公司
刘磊
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 舍弗勒技术股份两合公司, 刘磊 filed Critical 舍弗勒技术股份两合公司
Priority to PCT/CN2019/116531 priority Critical patent/WO2021087946A1/fr
Priority to CN201980099323.1A priority patent/CN114222677A/zh
Publication of WO2021087946A1 publication Critical patent/WO2021087946A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K17/00—Arrangement or mounting of transmissions in vehicles
    • B60K17/04—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing
    • B60K17/16—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of differential gearing

Definitions

  • the present invention relates to the field of motor vehicles, in particular to the field of vehicle transmissions, in particular to an electric bridge drive system in a pure electric vehicle or a hybrid vehicle, and more particularly to a two-speed transmission electric bridge drive system with dual clutches.
  • the electric drive methods include central motor drive and wheel hub motor drive.
  • a common arrangement form of the central motor drive system is also called an electric bridge (eAxle) drive system.
  • Figures 1 to 3 show a two-speed transmission bridge drive system.
  • the system includes a motor E, a differential D, a planetary gear set PG, a synchronizer 10, a motor shaft Se, an input shaft Si, and a gear shaft Sp , Intermediate shaft Sm and two gear pairs.
  • the motor E and the transmission are separated, and the motor shaft Se is connected to the input shaft Si of the transmission through a spline.
  • the input shaft Si is partially nestedly connected with the gear shaft Sp provided with the first gear pair driving wheel 21.
  • the motor shaft Se, the sun gear of the planetary gear set PG, the input shaft Si, and the gear shaft Sp are coaxially arranged.
  • the motor shaft Se is supported by the motor housing, the gear shaft Sp is supported by the transmission housing, one end of the input shaft Si is supported by the transmission housing, and the other end is supported by the gear shaft Sp nested therewith.
  • the intermediate shaft Sm provided with the second gear pair driving wheel 31 is supported by the housing of the transmission, and the intermediate shaft Sm is also installed with the first gear pair driven wheel 22.
  • the second gear pair driven wheel 32 is mounted on the housing of the differential D.
  • the change of the system speed gear is realized by the synchronizer 10 with a special structure.
  • the gear hub 12 of the synchronizer 10 is connected to the gear shaft Sp through a spline, and the sliding sleeve 11 is supported by the input shaft Si through the synchronizing ring, and is also supported by the gear shaft Sp through the gear hub 12.
  • An engagement ring gear 13 for engaging with the sliding sleeve 11 in the first gear is welded to the planet carrier of the planetary gear set PG, and is supported by the input shaft Si; used with the sliding sleeve in the second gear
  • the other engagement ring gear 14 to which 11 engages is connected to the input shaft Si through a spline.
  • the above system has at least the following problems:
  • the coaxially arranged motor shaft Se, input shaft Si, and gear shaft Sp are provided separately.
  • the input shaft Si and the gear shaft Sp need to be able to rotate relative to each other, and the gear shaft Sp needs to provide support for the input shaft Si, and the input shaft Si needs to be able to rotate relative to each other.
  • the planetary gear set PG as the first-stage reduction gear, has a high speed, which is not conducive to the system's NVH control.
  • the horizontal position of the rotation axis of the sun gear of the planetary gear set PG is high, which increases the difficulty of lubricating the planetary gear set PG.
  • the synchronizer 10 has a special and complex structure, high manufacturing cost and low reliability, and the synchronizer 10 occupies a large space in the axial direction of the system, which is not conducive to the design requirement of a small size in the axial direction of the system.
  • the power transmission of the system is interrupted during the shifting process.
  • the purpose of the present invention is to overcome or at least alleviate the above-mentioned shortcomings of the prior art, and provide a two-speed transmission bridge drive system with a double clutch with a simple and compact structure.
  • the invention provides a two-speed transmission bridge drive system with dual clutches, which includes a housing of the system, a motor, a dual clutch, a planetary gear set, a differential, a motor shaft, a first input shaft, a second input shaft, The output shaft, the first gear set and the second gear set, of which,
  • the motor shaft is non-rotatably connected to the rotor of the motor and the active part of the dual clutch, and the active part can be selectively engaged with the first driven disc or the second driven disc of the dual clutch to Transmit torque,
  • the first driven disc is connected to the first input shaft in a non-rotatable manner
  • the second driven disc is connected to the second input shaft in a non-rotatable manner
  • the first input shaft is used to transmit torque to the first gear set
  • the second input shaft is used to transmit torque to the second gear set
  • the first gear set and the second gear set are both used to transmit torque to the output shaft
  • the output shaft is non-rotatably connected with the sun gear of the planetary gear set, the planet carrier of the planetary gear set is non-rotatably connected with the housing of the differential, and the ring gear of the planetary gear set It is connected to the housing of the system in a non-rotatable manner.
  • the first gear set includes a first gear set driving wheel and a first gear set driven wheel that mesh with each other
  • the second gear set includes a second gear set driving wheel and a second gear set that mesh with each other.
  • Gear set driven wheel
  • the first input shaft is connected to the driving wheel of the first gear set in a non-rotatably connected manner
  • the second input shaft is connected to the driving wheel of the second gear set in a non-rotatably connected manner
  • the driven wheels of the first gear set and the driven wheels of the second gear set are both non-rotatably connected with the output shaft.
  • the number of teeth of the driving wheel of the first gear set is less than the number of teeth of the driven wheel of the first gear set
  • the number of teeth of the driving wheel of the second gear set is less than the number of teeth of the driven wheel of the second gear set
  • the number of teeth of the driving wheel of the first gear set is smaller than the number of teeth of the driving wheel of the second gear set.
  • the second input shaft is a hollow shaft
  • the second input shaft is sleeved on the first input shaft
  • the second input shaft can rotate relative to the first input shaft
  • Both the second input shaft and the first input shaft are arranged coaxially with the motor shaft.
  • the output shaft is a hollow shaft, and one output half shaft of the differential passes through the output shaft.
  • the planet carrier is formed integrally with the housing of the differential.
  • the output shaft is parallel to the motor shaft and is offset relative to the motor shaft in the radial direction of the motor shaft.
  • the level of the differential is lower than the level of the motor.
  • the support member of the output shaft includes a support plate, and the support plate is detachably mounted to the housing of the system with respect to the housing of the system.
  • the system when the first driven disc is engaged with the driving part and the second driven disc is separated from the driving part, the system is in a gear
  • each component has a simple and compact structure, high system reliability, small NVH influence, and no power interruption during gear shifting.
  • Figures 1 to 3 are schematic diagrams of a possible two-speed electric axle drive system.
  • Fig. 4 is a schematic diagram of a two-speed transmission bridge drive system with dual clutches according to an embodiment of the present invention.
  • Fig. 5 is a schematic diagram of the power transmission path of the electric bridge drive system shown in Fig. 4 in the first gear.
  • Fig. 6 is a schematic diagram of the power transmission path of the electric bridge drive system shown in Fig. 4 in the second gear.
  • Sp gear shaft Sm intermediate shaft; Se motor shaft; Si input shaft; S1 first input shaft; S2 second input shaft; So output shaft;
  • G11 first gear set driving wheel G12 first gear set driven wheel; G21 second gear set driving wheel; G22 second gear set driven wheel.
  • A represents the axial direction of the electric bridge drive system, and the axial direction A is consistent with the axial direction of the motor shaft Se of the motor E in the electric bridge drive system;
  • R represents the radial direction of the electric bridge drive system, This radial direction R coincides with the radial direction of the motor shaft Se of the motor E in the electric bridge drive system.
  • the electric bridge drive system includes a motor E, a motor shaft Se, a first input shaft S1, a second input shaft S2, an output shaft So, a dual clutch DC, a first gear set, a second gear set, and a differential D And planetary gear set PG.
  • the dual clutch DC is provided between the motor E and the gearbox, and the dual clutch DC is used to selectively transmit the torque from the motor E to the first gear set or the second gear set.
  • One gear in the first gear set and one gear in the second gear set are both connected to the sun gear of the planetary gear set PG in a rotationally fixed manner (non-rotatably).
  • the planet carrier of the planetary gear set PG is connected to the housing of the differential D in a torque-proof manner.
  • the rotor of the motor E is connected to the motor shaft Se in a torque-proof manner.
  • the dual clutch DC includes an active part, a first driven disc C1 and a second driven disc C2.
  • the active part of the dual clutch DC is, for example, a housing of the dual clutch DC.
  • the driving part can be selectively engaged with the first driven disc C1 or the second driven disc C2.
  • the dual clutch DC can use a modular and versatile existing dual clutch assembly.
  • the driving part of the dual clutch DC is connected to the motor shaft Se in a torque-proof manner
  • the first driven disc C1 is connected to the first input shaft S1 in a torsion-proof manner
  • the second driven disc C2 is connected to the second input shaft S2 in a torsion-proof manner.
  • the first driven disc C1 and the second driven disc C2 are spaced apart in parallel in the axial direction A
  • the second input shaft S2 is a hollow shaft
  • the second input shaft S2 is sleeved on the first input shaft S1
  • the first input shaft S2 The shaft S1 and the second input shaft S2 can rotate relatively.
  • the first input shaft S1 passes through the inside of the second input shaft S2 and both are arranged coaxially with the motor shaft Se.
  • the first gear set includes a first gear set driving wheel G11 and a first gear set driven wheel G12 that are always in mesh with each other
  • the second gear set includes a second gear set driving wheel G21 and a second gear set driven wheel G22 that are always meshed with each other.
  • the driving wheel G11 of the first gear set is connected to the first input shaft S1 in a rotationally fixed manner
  • the driving wheel G21 of the second gear set is connected to the second input shaft S2 in a rotationally fixed manner.
  • the first gear set driven wheel G12 and the second gear set driven wheel G22 are both connected to the output shaft So in a torque-proof manner.
  • the output shaft So is also connected to the sun gear of the planetary gear set PG in a torque-proof manner.
  • the output shaft So is parallel to the motor shaft Se and is offset relative to the motor shaft Se in the radial direction R. And preferably, the level of the output shaft So is lower than the level of the motor shaft Se.
  • the number of teeth of the driving wheel G11 of the first gear set is less than the number of teeth of the driven wheel G12 of the first gear set
  • the number of teeth of the driving wheel G21 of the second gear set is less than the number of teeth of the driven wheel G22 of the second gear set.
  • the ring gear of the planetary gear set PG is connected to the housing of the system (also called the housing of the transmission) in a torque-proof manner.
  • the planet carrier of the planetary gear set PG is connected to the housing of the differential D in a torque-proof manner, or the planet carrier and the housing of the differential D are formed as one body.
  • the output shaft So is a hollow shaft, and one output half shaft of the differential D can axially pass through the output shaft So.
  • the output shaft So is supported by the housing of the system.
  • a boss for supporting the output shaft So can be formed inside the housing, and the setting of the boss does not interfere with the installation of other parts (such as gears); it can also be provided for the system to be compatible with the housing.
  • the support plate is detachably connected to the body.
  • the support plate is used to support the output shaft So.
  • the support plate can be fixed to the inner cavity of the housing by bolts, for example.
  • the detachable support plate avoids the interference of the installation of parts and makes the system housing The structure is simplified.
  • the first driven disc C1 of the dual clutch DC is separated from the driving part of the clutch, and the second driven disc C2 of the dual clutch DC is engaged with the driving part of the clutch.
  • the torque of the motor E is sequentially transmitted through the motor shaft Se, the driving part of the dual clutch DC, the second driven disc C2, the second input shaft S2, the second gear set driving wheel G21, the second gear set driven wheel G22, and the output shaft So ,
  • the planetary gear set PG is arranged on the output shaft So downstream of the power transmission path of the system. Compared with the method in which the planetary gear set PG is arranged on the input shaft, on the one hand, the rotation speed of the rotating parts of the planetary gear set PG is lower. It is convenient to reduce the NVH of the system; on the other hand, the horizontal position of the planetary gear set PG is reduced, which is beneficial to the lubrication control of the planetary gear set PG.
  • the shifting of the system uses a modular dual clutch, which is easy to install, and for automotive parts suppliers, for example, the modular dual clutch can be taken from mature dual clutch transmission products, and the cost of component manufacturing is low.
  • the components of the present invention are simple in structure, especially the shifting components can use conventional dual clutches, so that the system has a compact structure, high reliability and low cost.
  • the first gear set and the second gear set in the present invention may not be limited to a gear pair composed of a pair (two) of gears.
  • it may also be a multi-stage capable gear composed of more than two gears.
  • a gear set that transmits torque that is, is composed of multiple gear pairs that can transmit torque in sequence).

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Structure Of Transmissions (AREA)

Abstract

La présente invention concerne un système d'entraînement de pont à vitesse variable à deux vitesses doté d'un double embrayage comprenant un double embrayage (CC), un train épicycloïdal (PG) et un différentiel (D). Un arbre de moteur (Se) est connecté à un rotor d'un moteur (E) et à une partie active du double embrayage (DC) ; un premier disque entraîné (C1) du double embrayage (DC) est connecté à un premier arbre d'entrée (S1) et un second disque entraîné (C2) est connecté à un second arbre d'entrée (S2). Le premier arbre d'entrée (S1) est utilisé pour transmettre le couple à un premier train d'engrenages ; le second arbre d'entrée (S2) est utilisé pour transmettre le couple à un second train d'engrenages ; et à la fois le premier train d'engrenages et le second train d'engrenages sont utilisés pour transmettre le couple à un arbre de sortie (So), l'arbre de sortie (So) étant connecté à un planétaire du train épicycloïdal (PG) ; et un porte-satellites du train épicycloïdal (PG) est connecté à un boîtier du différentiel (D). Selon l'invention, le système d'entraînement de pont à vitesse variable à deux vitesses comprend un double embrayage, tous les composants présentent une structure simple et compacte, le système est très fiable, l'impact de bruit, vibrations et rudesse est faible et le changement de vitesse peut être exempt d'interruption de puissance.
PCT/CN2019/116531 2019-11-08 2019-11-08 Système d'entraînement de pont à vitesse variable à deux vitesses doté d'un double embrayage WO2021087946A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/CN2019/116531 WO2021087946A1 (fr) 2019-11-08 2019-11-08 Système d'entraînement de pont à vitesse variable à deux vitesses doté d'un double embrayage
CN201980099323.1A CN114222677A (zh) 2019-11-08 2019-11-08 带双离合器的两档变速电桥驱动系统

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PCT/CN2019/116531 WO2021087946A1 (fr) 2019-11-08 2019-11-08 Système d'entraînement de pont à vitesse variable à deux vitesses doté d'un double embrayage

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115264020A (zh) * 2022-09-27 2022-11-01 小米汽车科技有限公司 减速器、动力驱动总成和车辆
WO2023178557A1 (fr) * 2022-03-23 2023-09-28 精进电动科技股份有限公司 Ensemble d'entraînement transversal

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101446337A (zh) * 2008-12-17 2009-06-03 重庆青山工业有限责任公司 双离合器自动变速器
JP2011178280A (ja) * 2010-03-01 2011-09-15 Honda Motor Co Ltd ハイブリッド車両用動力伝達装置及びその制御方法
CN104648115A (zh) * 2015-03-07 2015-05-27 合肥工业大学 集成式单驱动电机的插电式混合动力汽车的两挡变速驱动系统
CN204547733U (zh) * 2015-03-07 2015-08-12 合肥工业大学 单驱动电机的插电式混合动力汽车的两挡变速驱动系统
CN105189165A (zh) * 2013-03-12 2015-12-23 Zf腓德烈斯哈芬股份公司 针对车辆的传动系和用于执行负载变换的方法
CN107323255A (zh) * 2016-04-28 2017-11-07 舍弗勒技术股份两合公司 变速驱动桥及其双速驱动模块
CN107985058A (zh) * 2017-12-14 2018-05-04 广州汽车集团股份有限公司 一种混合动力耦合机构、控制系统及方法
CN110385982A (zh) * 2018-04-18 2019-10-29 舍弗勒技术股份两合公司 电桥驱动系统和交通工具

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101446337A (zh) * 2008-12-17 2009-06-03 重庆青山工业有限责任公司 双离合器自动变速器
JP2011178280A (ja) * 2010-03-01 2011-09-15 Honda Motor Co Ltd ハイブリッド車両用動力伝達装置及びその制御方法
CN105189165A (zh) * 2013-03-12 2015-12-23 Zf腓德烈斯哈芬股份公司 针对车辆的传动系和用于执行负载变换的方法
CN104648115A (zh) * 2015-03-07 2015-05-27 合肥工业大学 集成式单驱动电机的插电式混合动力汽车的两挡变速驱动系统
CN204547733U (zh) * 2015-03-07 2015-08-12 合肥工业大学 单驱动电机的插电式混合动力汽车的两挡变速驱动系统
CN107323255A (zh) * 2016-04-28 2017-11-07 舍弗勒技术股份两合公司 变速驱动桥及其双速驱动模块
CN107985058A (zh) * 2017-12-14 2018-05-04 广州汽车集团股份有限公司 一种混合动力耦合机构、控制系统及方法
CN110385982A (zh) * 2018-04-18 2019-10-29 舍弗勒技术股份两合公司 电桥驱动系统和交通工具

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023178557A1 (fr) * 2022-03-23 2023-09-28 精进电动科技股份有限公司 Ensemble d'entraînement transversal
CN115264020A (zh) * 2022-09-27 2022-11-01 小米汽车科技有限公司 减速器、动力驱动总成和车辆

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