WO2019109293A1 - 集成式的电驱动桥装置 - Google Patents

集成式的电驱动桥装置 Download PDF

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Publication number
WO2019109293A1
WO2019109293A1 PCT/CN2017/114966 CN2017114966W WO2019109293A1 WO 2019109293 A1 WO2019109293 A1 WO 2019109293A1 CN 2017114966 W CN2017114966 W CN 2017114966W WO 2019109293 A1 WO2019109293 A1 WO 2019109293A1
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Prior art keywords
motor
shaft
electric drive
drive axle
differential
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PCT/CN2017/114966
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English (en)
French (fr)
Inventor
张军辉
张仁
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舍弗勒技术股份两合公司
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Priority to PCT/CN2017/114966 priority Critical patent/WO2019109293A1/zh
Publication of WO2019109293A1 publication Critical patent/WO2019109293A1/zh

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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
    • B60K17/06—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of change-speed gearing
    • B60K17/08—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of change-speed gearing of mechanical type

Definitions

  • the present invention relates to an integrated electric drive axle apparatus for a motor vehicle comprising a motor, a shifting mechanism and a differential having a motor shaft coupled to a rotor of the electric machine, the shifting mechanism having a plurality of transmissions The drive shaft of the motor torque, the motor shaft transmits the motor torque to the differential through the drive shaft.
  • the electric axle assembly generally includes a reduction transmission mechanism and a differential mechanism that is transmitted by the reduction transmission mechanism to the drive train of the vehicle, that is, to the two output shafts of the differential.
  • Such an electric drive axle device is, for example, GKN's eAxle transmission system, which can improve the performance of the entire transmission system, but also saves costs and meets environmental protection requirements.
  • a transmission for an electric vehicle with a switching transmission and a differential transmission having a rotationally rotatable drive shaft and an intermediate parallel to the drive shaft is known from WO 2015150407 A1 a shaft, and at least one first switching stage with a first wheel set and a second switching stage with a second wheel set for transmitting torque from the drive shaft to the intermediate shaft at different gear ratios
  • the intermediate shaft has an output wheel for transmitting torque to a differential carrier of the differential transmission, wherein an axis of rotation of the differential carrier extends parallel to the intermediate shaft
  • the output wheel is axially disposed between the at least two switching stages. Therefore, the motor torque is passed through the drive shaft and the intermediate shaft in turn to the rotating shaft of the differential.
  • the technical problem to be solved by the present invention is to provide an electric drive bridge device which is more simplified, more integrated, and more space-saving than the prior art.
  • an integrated electric drive axle device for a motor vehicle comprising a motor, a shifting mechanism and a differential, the motor having a motor shaft connected to a rotor of the electric machine,
  • the shifting mechanism has one or more drive shafts that transmit motor torque, and the motor shaft transmits motor torque to the differential through the drive shaft, and all of the drive shaft and the motor shaft of the shifting mechanism according to the present invention have Common axis. Therefore, the electric drive axle device according to the present invention eliminates the intermediate shaft of the shifting mechanism as compared with the prior art, thereby making the structure simpler, saving space due to the coaxial line arrangement, and particularly saving the radial arrangement space.
  • the shifting mechanism has only one drive shaft. Therefore, the structure of the entire device is made simpler.
  • the motor shaft and the drive shaft are coaxially disposed, that is, the motor shaft and the drive shaft are the same shaft. This design greatly simplifies the electric drive axle arrangement, saving structural components and at the same time simplifying assembly.
  • the motor shaft connected to the rotor can directly extend into the shifting mechanism to drive the shifting mechanism to transmit the torque of the motor to the differential.
  • the shifting mechanism is a compound planetary gear mechanism.
  • the planetary gear transmission has the characteristics of small size, light weight, compact structure and high load carrying capacity, and is therefore particularly suitable for the electric drive axle device according to the present invention.
  • a compound planetary gear mechanism is used, for example, a Simpson or Ravigne type compound planetary gear mechanism is used, whereby the speed ratio can be increased.
  • the speed ratio of a conventional single-stage planetary gear mechanism is generally 1 to 5, and the speed ratio of the composite planetary gear mechanism can be 6 to 15, so that the compound planetary gear mechanism can further amplify the torque and obtain a wider range. Torque changes.
  • the electric machine and the shifting mechanism have a common housing, so that a large number of fasteners can be reduced, and system strength and NVH (noise, vibration and harshness) problems can be improved.
  • the electric drive bridge device is designed as a unified integrated module as a whole. This modular design simplifies assembly and maintenance care.
  • more functional components can be integrated into the module, for example, the parking gear can also be integrated into the integrated module, in particular integrated into complex
  • the integrated planetary gear mechanism enables the integrated module to achieve more functions and further simplifies the entire system.
  • the integrated module can also be formed into a self-sealing system, thereby reducing or avoiding the risk of lubricant leakage during assembly, simplifying the device and increasing the safety of the overall system.
  • FIG. 1 shows a transmission according to the prior art
  • FIG. 2 shows an integrated electric drive axle arrangement in accordance with the present invention.
  • the switching gear mechanism 2 comprises two switching stages so that the torque introduced by the electric machine can be transmitted from the drive shaft 4 to the intermediate shaft 5 at two different gear ratios, the intermediate shaft 5 and the differential of the differential transmission 3 Bracket connection.
  • the introduced torque is distributed to the two half shafts by means of the differential transmission 3, and the torque is transmitted to the wheels through the half shaft.
  • FIG. 2 shows an integrated electric axle assembly 6 according to the invention comprising a motor 7, a compound planetary gear mechanism 8 and a differential 9.
  • the motor 7 also has a rotor and a motor shaft 10, and the rotor of the motor 7 drives the motor shaft 10 to rotate.
  • the motor shaft 10 according to the present invention extends directly into the compound planetary gear mechanism 8 to transmit the torque of the motor to the compound planetary gear mechanism 8.
  • the compound planetary gear mechanism 8 is coupled to the differential 9 via a gear to transmit the torque of the motor through the differential 9 to the wheels of the vehicle.
  • the drive shaft 10 of the motor 7 simultaneously serves as the power input shaft of the compound planetary gear mechanism 8, so that the structure of the electric drive bridge device shown in FIG. 2 is simpler and saves structural space, especially in the radial direction.
  • the electric drive axle device 6 according to Fig. 2 has an integrated housing 11, namely a motor 7, a compound planetary gear mechanism 8 and
  • the differential 9 has a common housing such that the entire device constitutes an integrated module.
  • the integrated module constitutes a self-sealing system, thus making the entire device easier to assemble and transport.

Abstract

一种用于机动车的集成式的电驱动桥装置（6），包括电机（7）、变速机构（8）和差速器（9），所述电机（7）具有与所述电机（7）的转子相连接的电机轴（10），所述变速机构（8）具有一根或多根传递电机（7）扭矩的传动轴，所述电机轴（10）通过所述传动轴将电机（7）扭矩传递给所述差速器（9）；变速机构（8）的全部传动轴与所述电机轴（10）具有共同的轴线。

Description

集成式的电驱动桥装置 技术领域
本发明涉及一种用于机动车的集成式的电驱动桥装置，包括电机、变速机构和差速器，所述电机具有与电机的转子相连接的电机轴，所述变速机构具有多根传递电机扭矩的传动轴，电机轴通过传动轴将电机扭矩传递给差速器。
背景技术
随着电力驱动和混合动力驱动车辆的发展，汽车制造商企业纷纷提出了相关的技术，其中电驱动桥装置是很重要的一个领域。电驱动桥装置通常包括减速传动机构和差速器机构，由减速传动机构使得电机扭矩传递到机动车的驱动系上，即传递到差速器的两个输出轴上。这种电驱动桥装置例如是GKN的eAxle传动系统，它既能够提升整个传动系统性能，而且还节省成本并满足环保的需求。
由WO 2015150407 A1已知一种用于电动车的传动装置，带有切换传动机构和差速器传动机构，所述切换传动机构具有转动地能驱动的驱动轴和与所述驱动轴平行的中间轴，和至少一个带有第一轮组的第一切换级以及带有第二轮组的第二切换级，用于以不同的变速比将转矩从所述驱动轴传递到所述中间轴上，其中，所述中间轴具有输出轮用于将转矩传递到所述差速器传动机构的差速器支架上，其中，所述差速器支架的转动轴线平行于所述中间轴伸延，并且其中，所述输出轮轴向地布置在所述至少两个切换级之间。因此，电机扭矩先后通过驱动轴、中间轴然后传递给差速器的转动轴。根据这种设置，能够进行两级转速变换。由此可见，这种传动装置结构比较复杂，需要较大的结构空间，尤其径向的布置空间和较多的组件。对于很多需要轻便化的新能源汽车，这种复杂的传动装置并不适合。
发明内容
因此，本发明所要解决的技术问题是，提供一种与现有技术相比更简化、集成度更高、更节省空间的电驱动桥装置。
所述技术问题通过一种用于机动车的集成式的电驱动桥装置解决，该电驱动桥装置包括电机、变速机构和差速器，所述电机具有与电机的转子相连接的电机轴，所述变速机构具有一根或多根传递电机扭矩的传动轴，所述电机轴通过所述传动轴将电机扭矩传递给差速器，根据本发明所述变速机构的全部传动轴与电机轴具有共同的轴线。因此，与现有技术相比，根据本发明的电驱动桥装置省去了变速机构的中间轴，从而使得结构更加简单，由于同轴线设置节省了空间，尤其节省了径向的布置空间。
根据本发明的优选实施方式，变速机构只具有一根传动轴。因此使得整个装置的结构更加简单化。优选地是，电机轴与传动轴被同轴设置，即电机轴与传动轴是同一根轴。这种设计极大地简化了该电驱动桥装置，节省了结构部件并且也同时简化了装配。与转子连接的电机轴能够直接伸入到变速机构中，带动变速机构将电机扭矩传递给差速器。
根据本发明的另外的优选实施方式，变速机构是复合式行星齿轮机构。行星齿轮传动机构具有体积小、重量轻、结构紧凑和承载能力高的特点，因此特别适用于根据本发明的电驱动桥装置。优选地，使用复合式行星齿轮机构，例如使用辛普森式或拉威挪式复合行星齿轮机构，由此能够提高速比。普通的单级传动的行星齿轮机构的速比一般在1至5，而复合式行星齿轮机构的速比能够在6至15，因此使用复合式行星齿轮机构能够进一步放大扭矩，得到更宽范围的扭矩变化。
根据本发明的另外的优选实施方式，电机与变速机构具有共同的壳体，从而能够减少大量的紧固件，并且能够提高系统强度和改善NVH(噪声、振动与声振粗糙度)问题。更加优选地是，将电驱动桥装置在整体上设计为一个统一的集成模块。这种模块化设计，能够简化装配以及维修护理。此外，由于这种集成的模块化设计，能够将更多的功能部件集成到该模块中，例如能够将驻车齿轮也集成到该集成模块内，尤其集成到复 合式行星齿轮机构上，从而能够使得该集成模块实现更多的功能，并且进一步简化了整个系统。此外，由于这种集成的模块化设计，还能够使得所述集成模块形成自密封系统，从而能够降低或者避免在装配时润滑油泄露的风险，简化了装置并且提高了整个系统的安全性。
附图说明
下面结合附图来详细阐述本发明的优选实施例。附图为：
图1示出根据现有技术的传动装置，
图2示出根据本发明的集成式的电驱动桥装置。
相同的附图标记表示相同或者功能相同的部件。
具体实施方式
图1示出根据现有技术已知的传动装置1，具有切换传动机构2和差速器传动机构3，电机通过驱动轴4驱动切换传动机构2。切换传动机构2包括两个切换级，从而由电机导入的转矩能够从驱动轴4以两个不同的变速比传递到中间轴5，该中间轴5与差速器传动机构3的差速器支架连接。借助于差速器传动机构3使得导入的转矩分配到两个半轴上，在通过半轴使得转矩传递到车轮上。
图2示出根据本发明的集成式电驱动桥装置6，包括电机7、复合式行星齿轮机构8和差速器9。该电机7还具有转子和电机轴10，电机7的转子驱动电机轴10转动。根据本发明的电机轴10直接延伸到复合式行星齿轮机构8中，将电机的扭矩传递给复合式行星齿轮机构8。复合式行星齿轮机构8通过齿轮与差速器9连接，从而将电机的扭矩通过差速器9传递给车辆的车轮。通过将图2的结构与图1所示的现有技术相比可知，在图2所示的根据本发明的集成式的电驱动桥装置6中省略了中间轴5以及相关的支承轴承和紧固装置，电机7的驱动轴10同时作为复合式行星齿轮机构8的动力输入轴，从而使得图2所示的电驱动桥装置的结构更加简单，并且节省了结构空间，尤其径向上的结构空间。此外，根据图2所示的电驱动桥装置6具有集成壳体11，即电机7、复合式行星齿轮机构8和 差速器9具有共同的壳体，从而使得整个装置构成一个集成模块。优选的是，该集成模块构成一个自密封系统，因此使得整个装置更容易被装配和运输。
虽然在上述说明中示例性地描述了可能的实施例，但是应该理解到，仍然通过所有已知的和此外技术人员容易想到的技术特征和实施方式的组合存在大量实施例的变化。此外还应该理解到，示例性的实施方式仅仅作为一个例子，这种实施例绝不以任何形式限制本发明的保护范围、应用和构造。通过前述说明更多地是向技术人员提供一种用于转化至少一个示例性实施方式的技术指导，其中，只要不脱离权利要求书的保护范围，便可以进行各种改变，尤其是关于所述部件的功能和结构方面的改变。

Claims (9)

  1. 一种用于机动车的集成式的电驱动桥装置，包括电机、变速机构和差速器，所述电机具有与所述电机的转子相连接的电机轴，所述变速机构具有一根或多根传递电机扭矩的传动轴，所述电机轴通过所述传动轴将电机扭矩传递给所述差速器，
    其特征在于，所述变速机构的全部传动轴与所述电机轴具有共同的轴线。
  2. 根据权利要求1所述的电驱动桥装置，其特征在于，所述变速机构只具有一根传动轴。
  3. 根据权利要求2所述的电驱动桥装置，其特征在于，所述电机轴与所述传动轴是同一根轴。
  4. 根据权利要求1所述的电驱动桥装置，其特征在于，所述变速机构是复合式行星齿轮机构。
  5. 根据权利要求4所述的电驱动桥装置，其特征在于，所述复合式行星齿轮机构的速比能够达到15。
  6. 根据权利要求1所述的电驱动桥装置，其特征在于，所述电机与所述变速机构具有共同的壳体。
  7. 根据权利要求6所述的电驱动桥装置，其特征在于，所述电驱动桥装置整体上构成一个集成模块。
  8. 根据权利要求7所述的电驱动桥装置，其特征在于，在所述集成模块内集成驻车齿轮。
  9. 根据权利要求7所述的电驱动桥装置，其特征在于，所述集成模块被设计为自密封系统。
PCT/CN2017/114966 2017-12-07 2017-12-07 集成式的电驱动桥装置 WO2019109293A1 (zh)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060287150A1 (en) * 2005-06-17 2006-12-21 Yeon Ho Kim Powertrain of hybrid vehicle
CN103795183A (zh) * 2014-03-06 2014-05-14 北汽大洋电机科技有限公司 动力总成系统
CN203819033U (zh) * 2014-04-24 2014-09-10 上海中科深江电动车辆有限公司 一种用于电动汽车的动力总成装置
CN203836096U (zh) * 2014-05-26 2014-09-17 上海交通大学 电动车用两档自动变速器
CN204749857U (zh) * 2015-05-12 2015-11-11 郑州宇通客车股份有限公司 一种纯电动集成式动力总成系统及电动车辆
CN205371487U (zh) * 2016-01-22 2016-07-06 吉林大学 一种基于单行星排的电驱动系统

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060287150A1 (en) * 2005-06-17 2006-12-21 Yeon Ho Kim Powertrain of hybrid vehicle
CN103795183A (zh) * 2014-03-06 2014-05-14 北汽大洋电机科技有限公司 动力总成系统
CN203819033U (zh) * 2014-04-24 2014-09-10 上海中科深江电动车辆有限公司 一种用于电动汽车的动力总成装置
CN203836096U (zh) * 2014-05-26 2014-09-17 上海交通大学 电动车用两档自动变速器
CN204749857U (zh) * 2015-05-12 2015-11-11 郑州宇通客车股份有限公司 一种纯电动集成式动力总成系统及电动车辆
CN205371487U (zh) * 2016-01-22 2016-07-06 吉林大学 一种基于单行星排的电驱动系统

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