CN113147350A - 一种机械pto结构的电驱式拖拉机cvt动力总成 - Google Patents

一种机械pto结构的电驱式拖拉机cvt动力总成 Download PDF

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CN113147350A
CN113147350A CN202110363889.XA CN202110363889A CN113147350A CN 113147350 A CN113147350 A CN 113147350A CN 202110363889 A CN202110363889 A CN 202110363889A CN 113147350 A CN113147350 A CN 113147350A
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motor
storage unit
energy storage
front wheel
engine
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谭贵荣
林志强
黄幼林
赵增亮
董祥欢
陈涛
毛正松
欧阳石坤
王武先
王少尧
陆祖汉
曹少华
谭达辉
刘福平
战强
徐宏雷
杨先恺
李少明
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Guangxi Yuchai Machinery Co Ltd
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Shandong Yuchai Machinery Co ltd
Guangxi Yuchai Machinery Co Ltd
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Priority to CN202110363889.XA priority Critical patent/CN113147350A/zh
Publication of CN113147350A publication Critical patent/CN113147350A/zh
Priority to PCT/CN2021/141239 priority patent/WO2022206058A1/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
    • 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
    • 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
    • B60K6/24—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 combustion engines
    • 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
    • B60K6/26—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 motors or the generators
    • 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
    • B60K6/50—Architecture of the driveline characterised by arrangement or kind of transmission units
    • B60K6/52—Driving a plurality of drive axles, e.g. four-wheel drive
    • 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
    • B60K6/50—Architecture of the driveline characterised by arrangement or kind of transmission units
    • B60K6/54—Transmission for changing ratio
    • B60K6/543—Transmission for changing ratio the transmission being a continuously variable transmission
    • 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

Abstract

本发明提供一种机械PTO结构的电驱式拖拉机CVT动力总成，包括发动机、发电机、成对设置的前轮电机、成对设置的后轮电机、PTO传动箱、储能单元、充电接口和放电接口。本发明采用飞轮集成式电机，前轮和后轮均采用轮边/轮毂电机驱动，可实现全时、分时四驱，左右差速，防滑，PTO传动箱由发动机连接提供动力，配备储能单元，可实现外接充/放电，可以实现纯电行驶，结构紧凑。

Description

一种机械PTO结构的电驱式拖拉机CVT动力总成
技术领域
本发明属于传动技术领域，尤其涉及一种机械PTO结构的电驱式拖拉机CVT动力总成。
背景技术
现有拖拉机传动系统按换挡方式分为手动换挡传动系，动力不间断自动换挡传动系，液压机械无级变速传动系(HMCVT)。
采用手动换挡传动系，拖拉机田间作业时，由于土地阻力变化大，整机负荷变化大，采用手动换挡传动系的拖拉机需要频繁停车换挡，以满足农具作业牵引力及速度要求，员工工作强度大，作业效率低，作业质量不稳定；同时，发动机转速与车辆速度直接相关，整车速度变化导致发动机转速变化范围大，发动机不能工作在一个稳定经济的转速范围内，导致油耗高、排放差、震动磨损大。
采用拖拉机动力不间断自动换挡传动系，指发动机到变速箱的动力不中断的车辆行驶条件下，进行的换挡过程；采用湿式多片离合器作为换挡执行机构，需要挡位变换时，换挡的两个离合器按照控制油压的变化，顺序分开与结合两个离合器，在车辆负载行驶中实现不停车换挡，解决了手动换挡传动系作业时停车换挡的问题，减少了员工作业强度、提高了操控舒适性及作业效率。但存在主要缺点如下：
(1)、动力不间断自动换挡传动系发动机转速与车辆速度直接相关，车辆速度变化导致发动机转速变化范围大，发动机不能工作在一个稳定经济的转速范围内，发动机油耗高、排放差、震动磨损大。
(2)拖拉机由于作业要求多，挡位数量多，该种传动系结构需要的离合器数量及比例阀很多，以160马力16挡变速箱为例：全域自动变速箱需要8个离合器8个液压比例阀；由于一致性的原因，该型传动系的换挡性能需在专用出厂试验台上调试标定，随着使用时间的增长，离合器磨损增加，换挡控制时间发生了改变，平顺性变差，产生换挡冲击。
(3)目前，这些系统的技术基本被国外公司掌握并主要依靠进口，该传动系结构复杂、价格高、降价难、维修成本高。由于价格的原因，世界先进国家，动力换挡传动系多应用在80-200Hp拖拉机产品上。
(4)传统动力换挡变速箱，是单功率路线有级式传动，实现超级爬行挡(超低速)，要加很多繁复的减速轮系。并且，不能实现旋耕等主要作业时的无级传动，也就是理论上不能匹配到与旋耕机最佳的行驶速度。
采用液压机械无级变速传动系(HMCVT)，该传动系由液压柱塞变量泵/马达/多排行星机构/湿式离合器及制动器组成，主要优点是：通过行星排对发动机功率分流成两条功率路线，一条是机械功率路线，功率直接传递到变速箱输入轴；一条是液压功率路线，经机-液-机功率转换过程后，与变速箱输入轴实现全部功率的汇流；通过功率分流、汇流原理，实现传动系扭矩、转速按照车辆速度与牵引力要求自动连续变化，保证车辆变速时的牵引力与速度要求。该传动系(HMCVT)实现了车辆传动系无级自动变化，员工操作强度低，操作舒适性好，作业效率、质量高；由于发动机转速、扭矩与整车速度、牵引力完全解耦(不相关)，发动机可以稳定的工作在低油耗区域，震动小、排放好。
该传动系(HMCVT)主要存在如下缺点：
(1)、该传动系所采用的高压变量柱塞泵/马达、比例阀等属于精密液压偶件，对装配净洁度、使用清洁度、保养维护清洁度要求非常高，需要专用液压油，使用维护费用高昂；
(2)、该系统变速箱采用多排行星机构与湿式离合器或制动器，实现4-6个挡位的区域变换，该系统零件数量多，结构复杂，系统关键技术基本被国外公司掌握，产品主要依靠进口，该传动系成本高、降价难。
(3)、该传动系的传动效率低，最大仅能达到80％左右，较其他传动系效率低，燃油经济性较差。
(4)、由于价格与使用维护的原因，该系统在中国市场使用量非常少。由于价格的原因，世界先进国家，液压机械无级变速传动系(HMCVT)，多应用在200--400Hp拖拉机产品上。
发明内容
本发明提供一种机械PTO结构的电驱式拖拉机CVT动力总成，采用飞轮集成式电机，前轮和后轮都采用轮边/轮毂电机驱动，可实现全时、分时四驱，左右差速，防滑，PTO传动箱由发动机连接提供动力，配备储能单元，可实现外接充/放电，可以实现纯电行驶，结构紧凑。
本发明的技术方案如下：
一种机械PTO结构的电驱式拖拉机CVT动力总成，包括：发动机、发电机、成对设置的前轮电机、成对设置的后轮电机、PTO传动箱、储能单元、充电接口和放电接口；所述发动机和所述发电机动力连接，所述发电机与所述储能单元、前轮电机和后轮电机电性连接，所述前轮电机和所述后轮电机均与所述储能单元电性连接，所述前轮电机动力连接车辆前轮，所述后轮电机动力连接车辆后轮，所述PTO传动箱和所述发动机动力连接，所述充电接口和所述放电接口均与所述储能单元电性连接。
本发明利用电机低速大扭矩、转速范围宽的特性，不进行变速箱档位切换，直接使用电机调速，实现了作业过程的无级变速。
本发明采用前后轮电机驱动方式，结构紧凑，节省了大量的传动部件，结构简单。
优选的，所述发电机构造为飞轮集成式结构。结构紧凑，有利于整车布置。
优选的，本发明还包括高压配电盒，所述高压配电盒分别与所述前轮电机、储能单元、前轮电机、发电机、充电接口和放电接口电性连接。所述储能单元还通过高压配电盒向前轮电机和后轮电机提供电能。外部电能通过高压配电盒向所述储能单元提供电能，所述储能单元还可通过高压配电盒向外部提供电能。
优选的，所述前轮电机构造为轮边电机或轮毂电机中的一种，所述后轮电机构造为轮边电机或轮毂电机中的一种。
本发明的有益效果是：
本发明利用电机低速大扭矩、转速范围宽的特性，不进行后轮电机档位切换，直接使用电机调速，实现了作业过程的无级变速。
电机低速大扭矩和调速范围宽的特性，实现发动机转速和车速解耦，作业效率高。
电机反转，倒车便捷；
传动效率高(相对HMCVT)；
电池辅助供电，电机短时过载能力，爬坡过坎能力强；
电机扭矩大，发动机启动性能好；
整车起步快，加速性好；
电机低速稳定运行，实现拖拉机超低速爬行；
发动机转速和车速解耦，结合能量回收，行驶过程可以实现节油；
利用作业过程转弯等负荷小的时候，可以能力回收，实现节油。
附图说明
图1是本发明的结构示意图。
图中：1-发动机，2-发电机，3-前轮电机，4-后轮电机，5-高压配电盒，6-PTO传动箱，7-储能单元，8-充电接口，9-放电接口。
具体实施方式
下面结合附图和具体实施方式对本发明做进一步说明，本发明的示意性实施例及其说明用于解释本发明，并不构成对本发明的不当限定。
实施例1：
如图1所示，一种机械PTO结构的电驱式拖拉机CVT动力总成，包括：发动机1、发电机2、成对设置的前轮电机3、成对设置的后轮电机4、PTO传动箱6、储能单元7、充电接口8和放电接口9；所述发动机1和所述发电机2动力连接，所述发电机2与所述储能单元7、前轮电机3和后轮电机4电性连接，所述前轮电机3和所述后轮电机4均与所述储能单元7电性连接，所述前轮电机3动力连接车辆前轮，所述后轮电机4动力连接车辆后轮，所述PTO传动箱和所述发动机1动力连接，所述充电接口8和所述放电接口9均与所述储能单元7电性连接。
本实施例的工作原理如下：PTO传动箱6和发动机1实现动力结合连接，前轮和后轮分别采用前轮电机3和后轮电机4直接驱动，发动机1与PTO传动箱6直接传动连接用于提供输出动力，所述发动机1与发电机2连接，所述发电机2向前轮电机3、后轮电机4及储能单元7提供电能，所述储能单元7也可向前轮电机3后轮电机4提供电能。外部电能通过充电接口8向所述储能单元7提供电能，所述储能单元7还可通过放电接口9向外部提供电能。
实施例2：
如图1所示，一种机械PTO结构的电驱式拖拉机CVT动力总成，包括：发动机1、发电机2、成对设置的前轮电机3、成对设置的后轮电机4、PTO传动箱6、储能单元7、充电接口8和放电接口9；所述发动机1和所述发电机2动力连接，所述发电机2与所述储能单元7、前轮电机3和后轮电机4电性连接，所述前轮电机3和所述后轮电机4均与所述储能单元7电性连接，所述前轮电机3动力连接车辆前轮，所述后轮电机4动力连接车辆后轮，所述PTO传动箱6和所述发动机1动力连接，所述充电接口8和所述放电接口9均与所述储能单元7电性连接。
本实施例中，所述发电机2构造为飞轮集成式结构。结构紧凑，有利于整车布置。
本实施例中，本发明还包括高压配电盒5，所述高压配电盒5分别与所述前轮电机3、储能单元7、前轮电机3、发电机2、充电接口8和放电接口9电性连接。所述储能单元7还通过高压配电盒5向前轮电机3和后轮电机4提供电能。外部电能通过高压配电盒5向所述储能单元7提供电能，所述储能单元7还可通过高压配电盒5向外部提供电能。
本实施例中，所述前轮电机3构造为轮边电机或轮毂电机中的一种，所述后轮电机4构造为轮边电机或轮毂电机中的一种。

Claims (4)

1.一种机械PTO结构的电驱式拖拉机CVT动力总成，其特征在于包括：发动机(1)、发电机(2)、成对设置的前轮电机(3)、成对设置的后轮电机(4)、PTO传动箱(6)、储能单元(7)、充电接口(8)和放电接口(9)；所述发动机(1)和所述发电机(2)动力连接，所述发电机(2)与所述储能单元(7)、前轮电机(3)和后轮电机(4)电性连接，所述前轮电机(3)和所述后轮电机(4)均与所述储能单元(7)电性连接，所述前轮电机(3)动力连接车辆前轮，所述后轮电机(4)动力连接车辆后轮，所述PTO传动箱和所述发动机(1)动力连接，所述充电接口(8)和所述放电接口(9)均与所述储能单元(7)电性连接。
2.根据权利要求1所述的一种机械PTO结构的电驱式拖拉机CVT动力总成，其特征在于：所述发电机(2)构造为飞轮集成式结构。
3.根据权利要求1或2所述的一种机械PTO结构的电驱式拖拉机CVT动力总成，其特征在于：还包括高压配电盒(5)，所述高压配电盒(5)分别与所述前轮电机(3)、储能单元(7)、前轮电机(3)、发电机(2)、充电接口(8)和放电接口(9)电性连接。
4.根据权利要求1或2所述的一种机械PTO结构的电驱式拖拉机CVT动力总成，其特征在于：所述前轮电机(3)构造为轮边电机或轮毂电机中的一种，所述后轮电机(4)构造为轮边电机或轮毂电机中的一种。
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