具体实施方式

下面结合附图和实施例，对本实用新型的具体实施方式作进一步详细描述。以下实施例用于说明本实用新型，但不用来限制本实用新型的范围。

本实用新型为一种双电机驱动的自动变速器系统，针对拖拉机等农用车辆的自动变速器系统的设计。所述自动变速器系统包括发动机、发电机1、驱动电机3和车轮驱动组件，所述发动机包括发动机转子轴，所述发电机1包括发电机转子轴2，所述驱动电机3包括驱动电机转子轴4，所述车轮驱动组件包括后桥驱动组件和前桥驱动组件；发动机与发电机1直连，发动机转子轴和发电机转子轴2共轴连接，所述发电机1连接驱动电机3，所述驱动电机3连接电机控制器，所述电机控制器和发动机1连接TCU控制器，即自动变速控制器，TCU控制器根据驾驶证驾驶意图生成控制信号发送给电机控制器，调整驱动电机3的转速，同时使发动机工作，由发动机驱动发电机1发电，发电机1供电于驱动电机3。

所述后桥驱动组件包括一级减速齿轮轴6、套设于所述一级减速齿轮轴6的一级减速主动齿轮5、与后桥连接的后桥输出轴8、和套设于所述后桥输出轴8上的一级减速从动齿轮7；所述驱动电机转子轴4与一级减速齿轮轴6固定连接，所述一级减速主动齿轮5与一级减速从动齿轮7啮合配合，所述一级减速主动齿轮5的直径小于一级减速从动齿轮7的直径，实现减速。驱动电机3依次通过一级减速齿轮轴6、后桥输出轴8驱动后桥使后车轮运行。

所述前桥驱动组件包括套设于所述后桥输出轴8上的二级减速齿轮组9、中间轴10、套设于所述中间轴10上的中间齿轮、与前桥连接的前桥输出轴12、和套设于所述前桥输出轴12上的三级减速齿轮组11；所述二级减速齿轮组和中间齿轮啮合配合，中间齿轮和三级减速齿轮组11啮合配合，所述二级减速齿轮组9的直径小于所述一级减速从动齿轮7的直径。通过二级减速齿轮组9、中间轴10、前桥输出轴12驱动前桥使前车轮运行，从而实现拖拉机的四轮驱动。本实用新型实施例中的前桥驱动组件也可以是其它能实现相同作用的其它结构。

拖拉机旋转作业时，不仅要驱动四轮行走，还要同时驱动旋转作业设备。若采用驱动电机驱动旋转作业设备，驱动电机的功率更大，驱动电机的体积更大，因此，本实施例采用发电机转子轴连接旋转作业设备，能降低旋转作业工况时的驱动电机3的能耗，减小驱动电机3的体积，而且，所述驱动电机转子轴4与一级减速齿轮轴6均为空心，所述发电机转子轴2从所述驱动电机转子轴4和一级减速齿轮轴6的空心穿出，连接旋转作业设备，也有利于减小整机体积，由于拖拉机作业时发电机转子轴转速很低，所以发电机转子轴2与空心的摩擦生热较小，不会造成散热困难。

本实施例中，采用双电机结构，驱动电机3用于四车轮的驱动，通过调整驱动电机3的转速实现对车速的调整，实现自动换挡，能满足拖拉机田间作业的各种复杂工况，而且避免了多档位导致的多级齿轮传动，提升传动效率；由于拖拉机田间作业工况时，拖拉机车速低，则驱动电机3转速低，扭矩大，使得驱动单机3效率低，通过使用一级减速主动齿轮5、一级减速从动齿轮7、二级减速齿轮组9和三级减速齿轮组11，使得驱动电机3作业时能处于高效区，节约驱动电机能耗；发电机1用于给驱动电机3发电，同时由发动机带动旋转作业设备旋转，旋转作业设备由发电机1供电，能降低旋转作业工况时的驱动电机3的能耗；

发电机1和驱动电机3之间可以通过电池连接供电，也可以直接连接供电，通过电池供电，有利于供给稳定电压，通过直接供电，因拖拉机作业功耗较大，需要使用大容量电池，导致电池的布置空间较大、电池成本过高。

综上可知，通过上述的一种双电机驱动的自动变速器系统及其拖拉机，具有以下有益效果：

(1)本实用新型通过发电机供电于驱动电机，通过驱动电机用于拖拉机的驱动，通过对驱动电机转速的控制实现无级调速，取消繁琐的人工操作换挡，替代了复杂的多档位手动变速箱，实现自动换挡，利于驾驶员操作，减少用于调档的多级齿轮传动，提升传递效率，降低了整机油耗，但仍能满足拖拉机田间作业的各种复杂工况；

(2)本实用新型由于拖拉机田间作业时，车速低，若没有减速齿轮，则驱动电机转速低，扭矩大，驱动电机效率低，但通过多个减速齿轮，提升工作时驱动电机的转速，使得驱动电机工作在高效率区域，节省能耗；

(3)本实用新型直接通过发动机带动旋转作业设备旋转，进一步降低旋转作业工况时的驱动电机的能耗，有利于节能减排，并将发电机转子轴从驱动电机转子轴和一级减速齿轮轴的空心穿出穿过，减小整机体积，但不影响散热；

(4)本实用新型结构紧凑，体积小，易于在拖拉机上进行布置。

最后应说明的是：以上实施例仅用以说明本实用新型的技术方案，而非对其限制；虽然结合附图描述了本实用新型的实施方式，但是本领域技术人员可以在不脱离本实用新型的精神和范围的情况下做出各种修改和变型，这样的修改和变型均落入由所附权利要求所限定的范围之内。

Specific embodiments

The following combined with the accompanying drawings and embodiments, the specific embodiments of the present invention will be further described in detail. The following embodiments are used to illustrate the present invention, but not to limit the scope of the present invention.

The utility model is a two-motor driven automatic transmission system, designed for an automatic transmission system for agricultural vehicles such as tractors. The automatic transmission system comprises an engine, a generator 1, a drive motor 3 and a wheel drive component, the engine comprises an engine rotor shaft, the generator 1 includes a generator rotor shaft 2, the drive motor 3 includes a drive motor rotor shaft 4, the wheel drive assembly comprises a rear axle drive assembly and a front axle drive component; the engine is directly connected to the generator 1, the engine rotor shaft and the generator rotor shaft 2 co-axial connection, the generator 1 is connected to the drive motor 3, the drive motor 3 is connected to the motor controller, The motor controller and the engine 1 are connected to the TCU controller, i.e., the automatic variable speed controller, the TCU controller generates a control signal sent to the motor controller according to the driving intention of the driver's license, adjusts the speed of the drive motor 3, and makes the engine work, the engine drives the generator 1 to generate electricity, the generator 1 is powered by the drive motor 3.

The rear axle drive component comprises a first-stage reduction gear shaft 6, a first-stage reduction active gear set in the first-stage reduction gear shaft 6, a rear axle output shaft 8 connected to the rear axle, and a first-stage reduction driven gear 7 set on the rear axle output shaft 8; the drive motor rotor shaft 4 is fixedly connected with the first-stage reduction gear shaft 6, the first-stage reduction active gear 5 is meshed with the first-stage reduction driven gear 7 meshing, the diameter of the first-stage reduction active gear 5 is less than the diameter of the first-stage reduction follower gear 7, to achieve deceleration. Drive motor 3 in turn through the first stage reduction gear shaft 6, rear axle output shaft 8 drive the rear axle to make the rear wheel run.

The front axle drive component comprises a secondary reduction gear set 9 set on the rear axle output shaft 8, an intermediate shaft 10, an intermediate gear set on the middle axle 10, a front axle output shaft 12 connected to the front axle, and a three-stage reduction gear set 11 disposed on the front axle output shaft 12; the secondary reduction gear set and the intermediate gear meshing and mating, the intermediate gear and the three-stage reduction gear group 11 meshing and cooperating, the diameter of the secondary reduction gear group 9 is less than the diameter of the first stage reduction slave gear 7. The front wheels are driven by the two-stage reduction gear set 9, the middle shaft 10, and the front axle output shaft 12 to drive the front wheels, so as to realize the four-wheel drive of the tractor. The front axle drive assembly in the present invention embodiment may also be other structures capable of achieving the same effect.

When the tractor rotates, it is necessary not only to drive the four-wheel walk, but also to drive the rotating work equipment at the same time. If the use of a drive motor to drive rotating work equipment, the power of the drive motor is greater, the volume of the drive motor is greater, therefore, the present embodiment uses a generator rotor shaft to connect the rotating work equipment, can reduce the energy consumption of the drive motor 3 when rotating the working conditions, reduce the volume of the drive motor 3, moreover, the drive motor rotor shaft 4 and the first stage reduction gear shaft 6 are hollow, the generator rotor shaft 2 from the drive motor rotor shaft 4 and the hollow of the first stage reduction gear shaft 6 out, connected to the rotating operation equipment, It is also conducive to reducing the volume of the whole machine, because the generator rotor shaft speed is very low when the tractor is operating, so the friction between the generator rotor shaft 2 and the hollow core generates less heat, and it will not cause heat dissipation difficulties.

In the present embodiment, the use of dual motor structure, drive motor 3 for four wheels drive, by adjusting the speed of the drive motor 3 to achieve the adjustment of the speed, to achieve automatic shifting, can meet the tractor field operation of a variety of complex working conditions, and avoid multi-gear caused by multi-stage gear transmission, improve transmission efficiency; due to the tractor field operation conditions, tractor speed is low, the drive motor 3 speed is low, torque is large, so that the drive single machine 3 efficiency is low, by using a first-level deceleration active gear 5, Primary deceleration driven gear 7, secondary deceleration gear set 9 and three-stage deceleration gear set 11, so that the drive motor 3 can be in the high efficiency zone when operating, saving the energy consumption of the drive motor; generator 1 is used to generate electricity for the drive motor 3, while the engine drives the rotation of the rotating operation equipment, the rotating operation equipment is powered by the generator 1, which can reduce the energy consumption of the drive motor 3 during the rotating operation conditions;

Generator 1 and drive motor 3 can be connected to the battery power supply, can also be directly connected to the power supply, through the battery power supply, is conducive to the supply of stable voltage, through direct power supply, because the tractor operation power consumption is larger, the need to use a large capacity battery, resulting in a larger battery layout space, battery cost is too high.

In summary, it can be seen that the automatic transmission system driven by the above two motors and its tractor has the following beneficial effects:

(1) The utility model is powered by the generator to the drive motor, driven by the drive motor for the drive of the tractor, through the control of the drive motor speed to achieve stepless speed regulation, cancel the cumbersome manual operation shift, replace the complex multi-gear manual transmission, to achieve automatic shifting, conducive to driver operation, reduce the multi-stage gear transmission for gear adjustment, improve transmission efficiency, reduce the fuel consumption of the whole machine, but still meet the various complex working conditions of tractor field operations;

(2) The present invention due to tractor field operation, low speed, if there is no reduction gear, the drive motor speed is low, torque is large, the drive motor efficiency is low, but through a plurality of reduction gears, improve the speed of the drive motor during work, so that the drive motor works in a high efficiency area, saving energy consumption;

(3) The present invention directly drives the rotation of the rotating work equipment through the engine, further reduces the energy consumption of the drive motor during the rotating operation condition, is conducive to energy saving and emission reduction, and the generator rotor shaft is penetrated from the hollow core of the drive motor rotor shaft and the first-stage reduction gear shaft, reducing the volume of the whole machine, but does not affect the heat dissipation;

(4) The present utility model has a compact structure, small size, and is easy to arrange on the tractor.

Finally, it should be noted that the above embodiments are used only to illustrate the technical solution of the present invention, and not to limit it; although the embodiment of the present utility model is described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variants without departing from the spirit and scope of the present utility model, such modifications and variants fall within the scope of the appended claims.