CN105946545A - Low-power tractor driving mechanism compact in structure - Google Patents
Low-power tractor driving mechanism compact in structure Download PDFInfo
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- CN105946545A CN105946545A CN201610324766.4A CN201610324766A CN105946545A CN 105946545 A CN105946545 A CN 105946545A CN 201610324766 A CN201610324766 A CN 201610324766A CN 105946545 A CN105946545 A CN 105946545A
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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
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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
- B60K6/42—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
- B60K6/48—Parallel type
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- 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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- 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
- Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
- Y02T10/92—Energy efficient charging or discharging systems for batteries, ultracapacitors, supercapacitors or double-layer capacitors specially adapted for vehicles
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Structure Of Transmissions (AREA)
- Arrangement Of Transmissions (AREA)
Abstract
The invention discloses a low-power tractor driving mechanism compact in structure. The low-power tractor driving mechanism comprises a front axle, a rear axle, a gear transfer case, an electromechanical compound transmission system and a power output transmission case. The electromechanical compound transmission system comprises an engine, a first motor, a second motor, a power distributor and a power integrated piece. The power integrated piece is connected with an input shaft of the gear transfer case through an external engagement gear. A rear output shaft of the gear transfer case is connected with the rear axle. A front output shaft of the gear transfer case is connected with the front axle. An output shaft of the engine is connected with the power output transmission case by connecting an elastic coupler, the first motor and the power distributor through a clutch. According to the low-power tractor driving mechanism, the power of the engine is divided at the input end and converged on a wheel driving shaft at the output end, stepless speed change and compound driving of two power flows can be achieved, and the low-power tractor driving mechanism has the advantages of being simple in transmission structure, small in occupied space, high in transmission efficiency, low in emission amount, low in oil consumption and easy to operate.
Description
Technical field
The invention belongs to agricultural machinery technological field, the light tractor being specifically related to a kind of compact conformation drives structure.
Background technology
nullThe actuating device of China's agricultural traction engine particularly big-powered tractor uses the change speed gear box of gear type mostly at present，When utilizing tractor to plough，Need low travel speed and big output moment of torsion，Tractor is on road surface during transport driving，Need relatively high travel speed and little output moment of torsion，For adapting to the frequent variation of external load and stroke resistance，Change speed gear box need can be in good time change rotating speed and moment of torsion，This typically requires the gearshift row increasing change speed gear box，The structure necessarily making change speed gear box is complicated and heavy，And though the static pressure transmission mode using hydraulic pump to add motor can realize stable infinitely variable speeds，But it is relatively low to there is transmission efficiency、The problems such as element cost is high，But it is short to there is cruising time in pure motorized motions、The shortcomings such as charging inconvenience，For big-powered tractor，It is big to there is volume in jumbo accumulator、Heavy Weight、High in cost of production problem；And the drive system using electromotor, electromotor, motor, change speed gear box to be sequentially connected in series setting can be applied on big-powered tractor, but the power that electromotor sends first is transferred to electric energy by electromotor, mechanical energy is transferred to again by motor, there is twice energy conversion in whole actuating device, cause drive inefficient, simultaneously because electromotor is directly connected to electromotor, generator speed is low and motor installed power is big, equally exist motor volume and weight is big, car load difficulty in arrangement, the problems such as cost is high.
nullNow with automobile production producer start to develop the change speed gear box of power dividing，The structure of change speed gear box can be simplified，Realize stepless shift function，The Prius hybrid power system (THS) of Toyota Company is exactly the infinitely variable speed transmission using power split formula，And it has been successfully applied to automotive field，THS actuating device is according to the operating mode of automobile，There is multiple-working mode，System controls complexity，Its drive system mainly meets the automobile control needs to direction of advance speed，Prius automobile is when reversing，Tail-off，Storage battery energy is used to carry out pure electronic reversing，When this is mainly due to reversing，Motor (gear ring) reversion of Prius，If electromotor is still in work，I.e. planet carrier is rotating forward，According to planetary mechanism differential principle，The speed that electromotor (sun gear) rotates forward can be made faster，Exceed the rated speed of permission，Affect the service life of gear and bearing，Therefore Prius reversing uses electric-only mode，And back-up speed is difficult to too fast，The all parts that can make planetary mechanism is operated in the restriction range of speeds.
And tractor operating mode is changeable, Function Class is various, work under bad environment, travel speed and the output pull strength of tractor will be accurately controlled in direction of advance and astern direction, the operating mode of reversing long-time for tractor, if employing electric-only mode, then need the biggest accumulator capacity, cause car load layout difficulty, therefore the THS actuating device of Prius is to be not suitable for using on tractor；In addition Prius automobile is when urban district travels, meeting frequently braking and acceleration, Brake energy recovery is considerable, additionally for vehicle starting and astern condition, all uses pure electronic mode to travel, therefore Prius automobile is equipped with a larger capacity accumulator, and tractor is often at field work, travel speed is low, and Brake energy recovery is limited, and tractor moves forward and backward and is both needed to externally export pull strength, it is therefore desirable to existing actuating device is improved.
Summary of the invention
For solving the problems referred to above, the invention discloses the light tractor drive mechanism of a kind of compact conformation, engine power is shunted at input, meet on wheel drive shaft at outfan, tractor is made all to utilize the power of electromotor to be driven when moving forward and backward, by suitable control strategy, can realize tractor has wider stepless speed regulation scope and bigger pull strength moving forward and backward on direction, driving means has drive mechanism simple in construction, easy and simple to handle, transmission efficiency advantages of higher, the operating point of electromotor can be improved simultaneously, improve the fuel economy of electromotor and improve emission performance.
For reaching above-mentioned purpose, technical scheme is as follows:
nullA kind of light tractor drive mechanism of compact conformation，It is characterized in that: include propons、Back axle、Gear transfer box、Electromechanical combined drive system、Power output transmission case，Described electromechanical combined drive system includes electromotor、A number motor、No. two motors、Power divider and power set part，Described power divider is gear structure，Described power divider has three to connect end，It is respectively the sun gear of planetary gears、Gear ring and planet carrier，Described planet carrier is connected with the output shaft of electromotor，Gear ring and a motor power shaft connect，Sun gear is connected with power set part，Described No. two motors are connected with power set part，Power set part is connected with the power shaft of gear transfer box by external gear pump，The rear output shaft of gear transfer box is connected with back axle，Front output shaft is connected with propons，The output shaft of described electromotor passes sequentially through yielding coupling、A number motor、Power divider、Power set part、No. two motors，It is connected with power output transmission case by clutch again，The described power output transmission case other end is provided with power output shaft.
As a modification of the present invention, described electromotor, motor, No. two motors, power divider, power set parts are for being coaxially disposed.
As a modification of the present invention, described power divider is binary single planetary gear.
As a modification of the present invention, described electromotor is diesel engine, and a described motor is magneto alternator, and described No. two motors are permasyn morot.
The invention has the beneficial effects as follows:
nullThe light tractor drive mechanism of a kind of compact conformation of the present invention，The transmission mode converged again after using power dividing，By power divider, engine power is shunted: a part flows to Electric Drive part，Another part flows to mechanical driving part，Two parts power finally meets on wheel drive shaft，Jointly drive walking，By the conservative control of control system，Enable the working condition according to tractor，It is electrical power and mechanical output the driving power reasonable distribution of electromotor，Make two-way transmission collaborative work，Realizing while stepless shift function steadily realizes，The operating point of electromotor can be improved，Thus improve working performance and the fuel economy of tractor，Motor installed power is little simultaneously，It is prone to motor structure on tractor arrange and install，Motor is directly connected with power set part，Therefore the working speed of motor is suitable，Operating is stable，Motor balance is good，The reliability of parts is higher，The most easily arrange in structure，It is suitable for the tractor that motor power (output) is little，Simultaneously take account of tractor to exist and move forward and backward and be required to the operating mode of work，Electromotor and motor have been carried out specific placement，Make tractor when retreating，Engine power is still used to carry out driven by power，Ensure that tractor still can be with stepless speed regulation and given play to suitable pull strength when reversing，Guarantee that tractor advances、Direction of retreat reliably working.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention.
Fig. 2 is the structural representation of power divider of the present invention.
Fig. 3 is low-speed tractor shelves electric power distribution ratio of the present invention.
Fig. 4 is tractor top gear electric power distribution ratio of the present invention.
Fig. 5 is low-speed tractor shelves pull strength characteristic curve of the present invention.
Fig. 6 is tractor top gear pull strength characteristic curve of the present invention.
Fig. 7 is the present invention electromechanical combined drive system astern condition planetary structure nomographic chart.
Fig. 8 is Prius automobile THS system astern condition planetary mechanism nomographic chart of the present invention.
Reference numerals list:
1, propons, 2, electromotor, 3, yielding coupling, 4, engine output shaft, 5, a motor, 6, power divider, 7, No. two motors, 8, power set part, 9, clutch, 10, back axle, 11, power output transmission case, 12, power output shaft, 13, rear output shaft, 14, gear transfer box, 15, power shaft, 16, front output shaft, 17, external gear pump, 61, sun gear, 62, planetary gear, 63, gear ring, 64, planet carrier.
Detailed description of the invention
Below in conjunction with the accompanying drawings and detailed description of the invention, it is further elucidated with the present invention, it should be understood that following detailed description of the invention is merely to illustrate the present invention rather than limits the scope of the present invention.It should be noted that the word "front", "rear" used in describing below, "left", "right", "up" and "down" refer to the direction in accompanying drawing, word " interior " and " outward " refer respectively to the direction towards or away from particular elements geometric center.
nullAs shown in Figure 1，The light tractor drive mechanism of a kind of compact conformation of the present invention，Comprise propons 1、Back axle 10、Gear transfer box 14、Electromechanical combined drive system、Power output transmission case 11，Electromechanical combined drive system includes electromotor 2、A number motor 5、No. two motors 7、Power divider 6、Power set part 8，A number motor 5 is configured to electromotor，No. two motors 7 are configured to motor，In space layout，Electromotor 2、A number motor 5、No. two motors 7、Power divider 6、Power set part 8 is coaxially arranged，It is connected by external gear pump 17 transmission between power set part 8 with power shaft 15，The rear output shaft 13 of gear transfer box 14 is connected with back axle 10，Front output shaft 16 is connected with propons 1，The output shaft 4 of electromotor is after the interconnection function through yielding coupling 3，Sequentially pass through a motor 5、Power divider 6、Power set part 8 and No. two motors 7，It is connected with the power output transmission case 11 of tractor by clutch 9 again，Power output transmission case 11 other end is provided with power output shaft 12，By regulation power output transmission case 11 speed ratio，The demand of power output shaft 12 different operating rotating speed can be realized.
The light tractor drive mechanism of a kind of compact conformation of the present invention, power divider 6 comprises sun gear 61, planetary gear 62, gear ring 63 and planet carrier 64, as shown in Figure 2: power divider 6 is the simple planetary arrangement of two-freedom, power divider 6 has three to connect end, and first connects end is planet carrier 64 and is connected with the output shaft 4 of electromotor；Its second connection end is configured to gear ring 63 and the power shaft with a motor 5 is connected；Its 3rd connection end is configured to sun gear 61 and is connected with power set part 8, and the effect of power divider 6 is that the output of electromotor 2 is divided into electrical power and mechanical output two parts, and externally exports；Motor 7 is directly connected with power set part 8, and the electrical power that mechanical output and the motor 7 of sun gear 61 transmission transmit is combined by power set part 8, is then passed to follow-up gear drive.
nullThe light tractor drive mechanism of a kind of compact conformation of the present invention，Specific works principle is as follows: the power of electromotor 2 output initially enters power divider 6 through engine output shaft 4，By the shunting action of power divider 6, the power (rotating speed and moment of torsion) of electromotor 2 is shunted: a part of engine power flows to a motor 5 through the gear ring 63 of power divider，This part is Electric Drive，A motor 5 is driven to generate electricity by gear ring 63，The electrical power sent is after motor module controller，Output is to No. two motors 7，By No. two motors 7, external rotation is done work，Electric energy is become mechanical energy，Export on power set part 8，The engine power of another part flows to the sun gear 61 of power divider 6，For machine driving，Two-part power finally meets at power set part 8，And pass to follow-up gear transfer box 14 by power shaft 15，By rear output shaft 13 and front output shaft 16, general power distributed to back axle 10 and propons 1，Realize the driving walking of tractor，Height quick change gear lock unit is used in gear transfer box 14，Tractor can be made to carry out field work and II grade (top gear) carries out transport at I grade (bottom gear)，Control by motor module controller，The output speed of controlled power transmission，So that the rotating speed consecutive variations of whole system outfan，Realize stepless shift function smooth transition，Break will not occur in speed-change process.
Working condition according to tractor, under the conservative control of electric machine control system, two-way transmission collaborative work can be made, the power making electromotor obtains an equitable breakdown, tractor shows the pulling figure of excellence, such as Fig. 3, 4 show electrical power and the mechanical output power sharing ratio schematic diagram under the different travel speed of tractor, Fig. 5, 6 is the pull strength characteristic curve of tractor, with I grade of (bottom gear of tractor, less than 20km/h) work as a example by explanation, the advance speed of I grade of working area of tractor is 0-20km/h, during tractor starting, need relatively large driving force, engine power is mainly converted to electrical power, this makes full use of the characteristic of motor low-speed big, carry out the driven by power of high pulling torque, play power-actuated advantage；nullBelow 6km/h (this is the ploughing operating rate that tractor is conventional) shown in Fig. 5，Tractor can give play to maximum drawbar pull，Along with improving constantly of tractor speed，Required driving force reduces，Under the regulation of electric machine control system，Electrical power is made to taper into and mechanical output becomes larger，As shown in Figure 3 and Figure 5，When speed is 6km/h，Electrical power becomes 73%，Mechanical output becomes 27%，When speed increases to 15km/h，Electrical power is reduced to 27%，Mechanical output increases to 73%，Pull strength gradually reduces，When reaching the max speed 20km/h，It is only machine driving，Power percentage is smooth to be changed，Both the feature that machinery driving efficiency is high had been made full use of，Pull strength also reduces to minima simultaneously，Meet vehicle and travel theory，It is 0～-15km/h that tractor retreats speed，During retrogressing，Engine power becomes electrical power by electromotor，Motor is made to invert，Machine driving is reactive power，System effectiveness has decline，But still stepless speed regulation can be realized and given play to relatively large traction，Such as Fig. 5，Ensure that tractor can be in retrogressing duty for a long time，Fig. 4 and Fig. 6 is power-division ratios and the pull strength characteristic curve of II grade of traffic zone of tractor，Its feature is similar with I grade of working area，And principle is identical.
The present invention has carried out special arrangement to the installation site of electromotor (motor 5) Yu motor (No. two motors 7), during reversing, the problem that generator speed is too high can be prevented, the planetary mechanism nomographic chart being illustrated in figure 7 in the present invention, inverted by motor, realize astern condition, now power set part 8 inverts, the i.e. sun gear 61 of power divider 6 inverts, and planet carrier (being connected with the output shaft of electromotor) can only rotate forward, structure due to planet circular system, relation between 3 part rotating speeds is always a straight line with gear ratio as proportionate relationship, therefore the gear ring of electromotor meeting speedup, but increasing degree is less, still in the admissible range of speeds, therefore can realize being driven vehicle backing by engine power；And during Prius reversing automobile, as used engine power to be driven, the then sun gear rotating speed meeting superelevation of electromotor, Fig. 8 is Prius automobile THS system planetary mechanism nomographic chart, dotted line position in figure, the sun gear of electromotor exceeds the speed limit, therefore Prius reversing automobile, use electric-only mode, make (planet carrier rotating speed is zero) to stall, and speed is difficult to too fast, just can make the sun gear rotating speed of electromotor within allowing the range of speeds, solid line position as shown in Figure 8, therefore THS system is unsuitable for tractor and uses.
Owing to for mechanical-electric compound drive, therefore the motor installed power under this kind of drive can diminish compared with series model, therefore uses this use type of drive, it is easy to accomplish motor structure on tractor is arranged and installed.
Electromotor 2 of the present invention is diesel engine, better economy, and fault is few, and maintenance is easy, reliable operation, sturdy and durable, the life-span is long, and a described motor 5 uses magneto alternator, described No. two motors 7 to use permasyn morot, volume is little, is lost low, and efficiency is high, saves the energy.
nullThe light tractor drive mechanism of a kind of compact conformation of the present invention，The transmission mode converged again after using power dividing，By power divider, engine power is shunted: a part flows to Electric Drive part，Another part flows to mechanical driving part，Two parts power finally meets on wheel drive shaft，Jointly drive walking，By the conservative control of control system，Enable the working condition according to tractor，It is electrical power and mechanical output the driving power reasonable distribution of electromotor，Make two-way transmission collaborative work，Realizing while stepless shift function steadily realizes，The operating point of electromotor can be improved，Thus improve working performance and the fuel economy of tractor，Motor installed power is little simultaneously，It is prone to motor structure on tractor arrange and install，Motor is directly connected with power set part，Therefore the working speed of motor is suitable，Stable，Motor balance is good，The reliability of parts is higher，The most easily arrange in structure，It is suitable for the tractor that motor power (output) is little，Simultaneously take account of tractor to exist and move forward and backward and be required to the operating mode of work，Electromotor and motor have been carried out specific placement，Make tractor when retreating，Engine power is still used to carry out driven by power，Ensure that tractor still can be with stepless speed regulation and given play to suitable pull strength when reversing，Guarantee that tractor advances、Direction of retreat reliably working.
The light tractor drive mechanism of a kind of compact conformation of the present invention, the drive system transmission efficiency that before overcoming, tractor is arranged in series is the highest, motor installed power is big, bulky shortcoming, actuating device of the present invention, engine power is shunted at input, meet on wheel drive shaft at outfan, tractor is made all to utilize the power of electromotor to be driven when moving forward and backward, the overall efficiency of power transmission is higher, both ensure that transmission efficiency, installing space and weight of equipment can be reduced again, speed change is steady, tractor has wider stepless speed regulation scope and bigger pull strength moving forward and backward on direction, improve work efficiency.
Above-described embodiment limits the present invention, the technical scheme that the mode of all employing equivalents or equivalent transformation is obtained the most in any form, all falls within protection scope of the present invention.
Claims (4)
- null1. the light tractor drive mechanism of a compact conformation，It is characterized in that: include propons、Back axle、Gear transfer box、Electromechanical combined drive system、Power output transmission case，Described electromechanical combined drive system includes electromotor、A number motor、No. two motors、Power divider and power set part，Described power divider is gear structure，Described power divider has three to connect end，It is respectively the sun gear of planetary gears、Planetary gear ring and planet carrier，Described planet carrier is connected with the output shaft of electromotor，Planetary gear ring and a motor power shaft connect，Sun gear is connected with power set part，Described No. two motors are connected with power set part，Power set part is connected with the power shaft of gear transfer box by external gear pump，The rear output shaft of gear transfer box is connected with back axle，Front output shaft is connected with propons，The output shaft of described electromotor passes sequentially through yielding coupling、A number motor、Power divider、Power set part、No. two motors，It is connected with power output transmission case by clutch again，The described power output transmission case other end is provided with power output shaft.
- The light tractor drive mechanism of a kind of compact conformation the most according to claim 1, it is characterised in that: described electromotor, motor, No. two motors, power divider, power set parts are for being coaxially disposed.
- The light tractor drive mechanism of a kind of compact conformation the most according to claim 1, it is characterised in that: described power divider is binary single planetary gear.
- The light tractor drive mechanism of a kind of compact conformation the most according to claim 1, it is characterised in that: described electromotor is diesel engine, and a described motor is magneto alternator, and described No. two motors are permasyn morot.
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| CN201610324766.4A CN105946545A (en) | 2016-05-17 | 2016-05-17 | Low-power tractor driving mechanism compact in structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107599819A (en) * | 2017-09-27 | 2018-01-19 | 四川省特种设备检验研究院 | A kind of power drive system of plug-in hybrid special purpose vehicle |
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Application publication date: 20160921 |