CN217598331U - Electric drive type tractor CVT power assembly with mechanical through PTO structure - Google Patents
Electric drive type tractor CVT power assembly with mechanical through PTO structure Download PDFInfo
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- CN217598331U CN217598331U CN202120681696.4U CN202120681696U CN217598331U CN 217598331 U CN217598331 U CN 217598331U CN 202120681696 U CN202120681696 U CN 202120681696U CN 217598331 U CN217598331 U CN 217598331U
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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
Abstract
The utility model provides an electricity that machinery pierces through PTO structure drives formula tractor CVT power assembly, engine, generator, back main driving motor, gearbox, front wheel motor, PTO transmission case and the energy storage unit that sets up in pairs, the PTO axle of PTO transmission case passes in proper order the main shaft of gearbox with connect with engine power behind the main shaft of back main driving motor. The utility model discloses a infinitely variable principle of motor speed governing, the wide characteristic of the big moment of torsion of motor low-speed and speed governing scope realizes engine speed and the decoupling zero of speed of a motor vehicle, and the operating efficiency is high.
Description
Technical Field
The utility model belongs to the technical field of the transmission, especially, relate to an electricity that drives formula tractor CVT power assembly that machinery is worn heart PTO structure.
Background
The existing tractor transmission system is divided into a manual gear shifting transmission system, a power uninterrupted automatic gear shifting transmission system and a hydraulic mechanical stepless speed change transmission system (HMCVT) according to a gear shifting mode.
The manual gear shifting transmission system is adopted, when the tractor works in the field, due to the fact that land resistance changes greatly and the load change of the whole tractor is large, the tractor adopting the manual gear shifting transmission system needs to be frequently stopped and shifted to meet the requirements of traction force and speed of farm tool operation, the working intensity of workers is high, the working efficiency is low, and the working quality is unstable; meanwhile, the rotating speed of the engine is directly related to the speed of the vehicle, the change range of the rotating speed of the engine is large due to the change of the speed of the whole vehicle, and the engine cannot work in a stable and economical rotating speed range, so that the oil consumption is high, the emission is poor, and the vibration and abrasion are large.
The method is characterized in that a tractor power uninterrupted automatic gear shifting transmission system is adopted, and the gear shifting process is carried out under the condition that the power from an engine to a gearbox is uninterrupted; adopt wet-type multiplate clutch as actuating mechanism that shifts, when the fender position was changeed, two clutches of shifting separated and combined two clutches according to the change of control oil pressure in proper order, realized not stopping and shift when the vehicle load was gone, solved the problem that stops and shift when manual gear shifting transmission system operation, reduced staff's working strength, improved and controlled travelling comfort and operating efficiency. But has the following major disadvantages:
(1) The engine speed of the continuous automatic power shifting transmission system is directly related to the vehicle speed, the change range of the engine speed is large due to the change of the vehicle speed, the engine cannot work in a stable and economical rotating speed range, and the engine has high oil consumption, poor emission and large vibration abrasion.
(2) Due to the fact that the tractor has multiple operation requirements and multiple gears, the transmission structure needs a large number of clutches and proportional valves, and a 160-horsepower 16-gear gearbox is taken as an example: the global automatic gearbox needs 8 clutches and 8 hydraulic proportional valves; due to the consistency, the gear shifting performance of the transmission system needs to be debugged and calibrated on a special delivery test bed, the abrasion of a clutch is increased along with the increase of the service time, the gear shifting control time is changed, the smoothness is poor, and gear shifting impact is generated.
(3) At present, the technology of the systems is basically mastered by foreign companies and mainly depends on import, and the transmission system has the disadvantages of complex structure, high price, difficult price reduction and high maintenance cost. For reasons of price, in advanced countries of the world, powershift transmissions are mostly applied to 80-200Hp tractor products.
(4) A traditional power gear shifting gearbox is in single-power line stepped transmission, achieves super creep gear (ultra-low speed), and needs a plurality of complex reduction gear trains. Furthermore, the stepless transmission during the main operations such as rotary tillage and the like cannot be realized, i.e. the optimal running speed of the rotary cultivator cannot be matched theoretically.
Adopt hydraulic pressure machinery infinitely variable transmission drive system (HMCVT), this drive system comprises hydraulic pressure plunger variable displacement pump/motor/multirow planetary mechanism/wet clutch and stopper, and the main advantage is: the power of the engine (1) is divided into two power routes through the planet row, one power route is a mechanical power route, and the power is directly transmitted to an input shaft of the gearbox; one is a hydraulic power route, and after the machine-liquid-machine power conversion process, the hydraulic power route and the input shaft of the gearbox realize the confluence of all power; by the power splitting and converging principle, the torque and the rotating speed of the transmission system can be automatically and continuously changed according to the speed and the traction requirement of the vehicle, and the traction and the speed requirement of the vehicle during speed change can be ensured. The transmission system (HMCVT) realizes stepless automatic change of the vehicle transmission system, and has the advantages of low operation intensity of staff, good operation comfort, high operation efficiency and high quality; because the rotating speed and the torque of the engine are completely decoupled (irrelevant) with the speed and the traction of the whole vehicle, the engine can stably work in a low oil consumption area, and has small vibration and good emission.
The drive train (HMCVT) has the following disadvantages:
(1) The high-pressure variable plunger pump/motor, the proportional valve and the like adopted by the transmission system belong to precise hydraulic coupling parts, have very high requirements on clean and clean assembly, use cleanliness and maintenance cleanliness, need special hydraulic oil and have high use and maintenance cost;
(2) The gearbox of the system adopts a multi-row planetary mechanism and a wet clutch or a brake to realize the regional change of 4-6 gears, the system has a large number of parts and a complex structure, the key technology of the system is basically mastered by foreign companies, products mainly depend on import, and the transmission system has high cost and difficult price reduction.
(3) The transmission efficiency of the transmission system is low, the maximum transmission efficiency can only reach about 80%, and the transmission system has low efficiency and poor fuel economy compared with other transmission systems.
(4) Due to the price and the use and maintenance, the system is used in a very small amount in the Chinese market. For reasons of price, the advanced countries in the world, the hydro-mechanical continuously variable transmission (HMCVT), are mostly applied to tractor products of 200-400 Hp.
SUMMERY OF THE UTILITY MODEL
The utility model provides an electricity that machinery is worn heart PTO structure drives formula tractor CVT power assembly adopts the infinitely variable principle of motor speed governing, and the decoupling zero of engine speed and speed of a motor speed is realized to the big moment of torsion of motor low-speed and the wide characteristic of speed governing scope, and the operating efficiency is high.
The technical scheme of the utility model as follows:
a mechanical feedthrough PTO arrangement electric drive tractor CVT powertrain comprising: the power transmission system comprises an engine, a generator, a rear main driving motor, a gearbox, a front wheel motor, a PTO transmission case and an energy storage unit, wherein the front wheel motor, the PTO transmission case and the energy storage unit are arranged in pairs; the engine is in power connection with the generator, the generator is respectively in electric connection with the energy storage unit, the rear main driving motor and the front wheel motor, the energy storage unit is respectively in electric connection with the rear main driving motor and the front wheel motor, the power of the rear main driving motor is transmitted to a rear axle through the gearbox, the main shaft structures of the rear main driving motor and the gearbox are hollow shaft structures, the PTO shaft of the PTO transmission box (sequentially penetrates through the main shaft of the gearbox and the main shaft of the rear main driving motor to be connected with the engine power, and the front wheel motor directly drives the front wheels.
The utility model discloses a infinitely variable principle of motor speed governing, the big moment of torsion of motor low-speed and the wide characteristic of speed governing scope realize engine speed and speed of a motor decoupling zero, and the operating efficiency is high.
The front wheel of the utility model is driven by the wheel edge/hub motor, thereby saving the transmission parts such as differential mechanism and half shaft, and having simple structure; the rear wheel is driven by a rear main driving motor and a transmission, a transmission shaft of the PTO transmission case is mounted by a straight-through structure, full-time and time-sharing four-wheel drive, left and right differential and skid resistance can be realized, the PTO transmission case is connected by an engine to provide power, an energy storage unit is arranged, external charging/discharging can be realized, pure electric driving can be realized, and the structure is compact.
Preferably, the generator is constructed into a flywheel integrated structure, has a compact structure and small space, and is beneficial to light weight.
Preferably, the utility model discloses still include the high voltage distribution box, the high voltage distribution box respectively with back main drive motor, energy storage unit, back main drive motor, front wheel motor and generator electric connection. The generator also provides electric energy to the front wheel motor, the rear main driving motor and the energy storage unit through the high-voltage distribution box. The energy storage unit also provides electric energy for the front wheel motor and the rear main driving motor through the high-voltage distribution box. The external electric energy provides electric energy for the energy storage unit through a high-voltage distribution box, and the energy storage unit can also provide electric energy to the outside through the high-voltage distribution box.
Specifically, the front wheel motor is constructed as one of a wheel edge motor or a wheel hub motor, and has the advantages of simple structure and low cost.
The utility model has the advantages that:
the stepless speed regulation of the motor is adopted, the characteristics of low speed, large torque and wide speed regulation range of the motor are adopted, the decoupling of the rotating speed and the vehicle speed of the engine is realized, and the working efficiency is high.
The front wheel edge motor is adopted and controlled by an electronic differential control technology, so that the precision is higher, a mechanical differential device is omitted for lightening, the parts are simplified, and the noise and vibration can be reduced;
the optimization of the overall arrangement of the whole vehicle and the matching optimization of the dynamic performance of the whole vehicle are facilitated;
the turning radius is small: the wheels on each side are independently controlled to drive in time-sharing and full-time manners;
the motor is easy to realize reverse rotation, and the backing is convenient;
the battery is used for assisting in power supply, the motor has short-time overload capacity, and the climbing and sill-passing capacity is strong;
the motor has large torque and good starting performance of the engine;
the whole vehicle starts quickly and has good acceleration;
the motor stably runs at a low speed, so that the tractor can crawl at an ultra-low speed;
the engine speed and the vehicle speed are decoupled, energy recovery is combined, and oil can be saved in the running process;
when the load is small, such as turning in the operation process, the capacity can be recovered, and the oil saving is realized.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a power connection structure diagram of the PTO transmission case according to the present invention.
In the figure: the system comprises an engine 1, a generator 2, a rear main driving motor 3, a gearbox 4, a front wheel motor 5, a PTO transmission box 6, an energy storage unit 7, a charging interface 8, a power supply interface 9, a high-voltage distribution box 10, a PTO shaft 11 and a front wheel 12.
Detailed Description
The invention will be further described with reference to the accompanying drawings and specific embodiments, which are illustrative of the invention and are not to be construed as unduly limiting the invention.
Example 1:
as shown in fig. 1 and 2, an electric drive tractor CVT powertrain of a mechanical feedthrough PTO configuration includes: the power transmission system comprises an engine 1, a generator 2, a rear main driving motor 3, a gearbox 4, a front wheel motor 5, a PTO transmission case 6 and an energy storage unit 7, wherein the front wheel motor, the PTO transmission case and the energy storage unit are arranged in pairs; the engine 1 is in power connection with the generator 2, the generator 2 is respectively in electric connection with the energy storage unit 7, the rear main driving motor 3 and the front wheel motor 5, the energy storage unit 7 is respectively in electric connection with the rear main driving motor 3 and the front wheel motor 5, the power of the rear main driving motor 3 is transmitted to a rear axle through the gearbox 4, the main shaft structures of the rear main driving motor 3 and the gearbox 4 are both hollow shaft structures, the PTO shaft 11 of the PTO transmission box 6 sequentially penetrates through the main shaft of the gearbox 4 and the main shaft of the rear main driving motor 3 to be in power connection with the engine 1, and the front wheel motor 5 directly drives the front wheel 12.
The working principle of the embodiment is as follows: the PTO shaft 11 of the PTO transmission case 6 penetrates through the rear main driving motor 3 and the transmission case 4 and then is in power connection with the engine 1, the rear axle is driven by the rear main driving motor 3+ the transmission case 4, the front axle is driven by the generator 2 and/or the energy storage unit 7 to drive the front wheel motor 5, the engine 1 is in direct transmission connection with the PTO transmission case 6 and is used for providing output power, the engine 1 is connected with the generator 2, the generator 2 provides electric energy for the rear main driving motor 3, the front wheel motor 5 and the energy storage unit 7, and the energy storage unit 7 can also provide electric energy for the rear main driving motor 3 and the front wheel motor 5.
Example 2:
as shown in fig. 1 and 2, an electric drive tractor CVT powertrain of a mechanical feedthrough PTO configuration includes: the power transmission system comprises an engine 1, a generator 2, a rear main driving motor 3, a gearbox 4, a front wheel motor 5, a PTO transmission case 6, an energy storage unit 7, a charging interface 8 and a power supply interface 9, wherein the front wheel motor, the PTO transmission case, the energy storage unit 7, the charging interface and the power supply interface are arranged in pairs; the charging interface 8 and the power supply interface 9 are electrically connected with the energy storage unit 7, so that external charging/discharging can be realized;
the utility model provides a motor-driven vehicle rear axle, including engine 1 with 2 power connections of generator, generator 2 respectively with energy storage unit 7, back main driving motor 3 and front wheel motor 5 electric connection, energy storage unit 7 respectively with back main driving motor 3 and front wheel motor 5 electric connection, back main driving motor 3 power transmits the rear axle via gearbox 4, the main shaft structure of back main driving motor 3 and gearbox 4 is the hollow shaft structure, and PTO axle 11 of PTO transmission case 6 passes in proper order the main shaft of gearbox 4 with behind the main shaft of back main driving motor 3 and engine 1 power connection, PTO transmission case 6 sets up in the rear axle rear, front wheel motor 5 direct drive front wheel 12.
The utility model discloses a infinitely variable principle of motor speed governing, the big moment of torsion of motor low-speed and the wide characteristic of speed governing scope realize engine speed and speed of a motor decoupling zero, and the operating efficiency is high.
In this embodiment, the generator 2 is configured as a flywheel integrated structure, and in this embodiment, the generator 2 is configured as a flywheel integrated structure, for example, a flywheel generator structure disclosed in chinese patent CN107979229a includes a crankshaft, a flywheel and a flywheel housing, and a power generation assembly between the flywheel and the flywheel housing. The integrated level is high, simple structure, and compact structure, the space is little, is favorable to the lightweight.
This embodiment still includes high voltage distribution box 10, high voltage distribution box 10 respectively with back main drive motor 3, energy storage unit 7, back main drive motor 3, front wheel motor 5 and generator 2 electric connection. The generator also provides electric energy to the front wheel motor 5, the rear main driving motor 3 and the energy storage unit 7 through the high-voltage distribution box 10. The energy storage unit 7 also provides electric energy to the front wheel motor and the rear main driving motor 3 through a high-voltage distribution box. The external power supplies power to the energy storage unit 7 through the high voltage distribution box 10, and the energy storage unit 7 may also supply power to the outside through the high voltage distribution box 10.
In this embodiment, the front wheel motor 5 is configured as a wheel-side motor, which is simple in structure, that is, the front wheel motor is disposed on both sides of the axle, and the front wheel motor 5 is a motor mounted on the wheel side to drive the wheel independently. The embodiment has low cost, can realize full-time and time-sharing four-wheel drive, and can realize left-right differential and skid resistance; the electric integration is high, and the unmanned operation can be realized; the PTO transmission box 6 is connected and output through the power piercing of the engine 1, and the structure is compact; the energy storage unit 7 is arranged, pure electric driving can be realized, and the charging interface Plug _ in and the power supply interface Plug _ out are arranged, so that external charging/discharging can be realized; the wheel rim speed can be monitored and controlled, and anti-skid control is realized.
Example 3:
the difference between this embodiment and the above embodiment 2 is that the front wheel motor 5 is a wheel hub motor, the front wheel motor 5 is embedded in a wheel, the stator is fixed on a tire, and the rotor is fixed on an axle instead of transmitting power to the wheel through a transmission shaft. Integrating the power, transmission and braking devices into the hub simplifies the mechanical mechanism.
Claims (4)
1. The utility model provides an electric drive formula tractor CVT power pack of mechanical punching PTO structure which characterized in that includes: the power transmission system comprises an engine (1), a generator (2), a rear main driving motor (3), a gearbox (4), a front wheel motor (5), a PTO transmission case (6) and an energy storage unit (7), wherein the front wheel motor, the PTO transmission case and the energy storage unit are arranged in pairs; the power transmission device is characterized in that the engine (1) is in power connection with the generator (2), the generator (2) is respectively in electric connection with the energy storage unit (7), the rear main driving motor (3) and the front wheel motor (5), the energy storage unit (7) is respectively in electric connection with the rear main driving motor (3) and the front wheel motor (5), the power of the rear main driving motor (3) is transmitted to a rear axle through the gearbox (4), the main shaft structures of the rear main driving motor (3) and the gearbox (4) are hollow shaft structures, the PTO shaft (11) of the PTO transmission box (6) sequentially penetrates through the main shaft of the gearbox (4) and the rear main shaft of the rear main driving motor (3) and is in power connection with the engine (1), and the front wheel motor (5) directly drives the front wheel (12).
2. A mechanical through-the-wire PTO configuration CVT powertrain as in claim 1, wherein: the generator (2) is configured as a flywheel-integrated structure.
3. An electric drive tractor CVT powertrain of mechanical feedthrough PTO configuration as claimed in claim 1 or 2, characterized in that: still include high voltage distribution box (10), high voltage distribution box (10) respectively with back main drive motor (3), energy storage unit (7), back main drive motor (3), front wheel motor (5) and generator (2) electric connection.
4. An electric drive tractor CVT powertrain of mechanical feedthrough PTO configuration as claimed in claim 1 or 2, characterized in that: the front wheel motor (5) is constructed as one of a wheel edge motor or a wheel hub motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120681696.4U CN217598331U (en) | 2021-04-02 | 2021-04-02 | Electric drive type tractor CVT power assembly with mechanical through PTO structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120681696.4U CN217598331U (en) | 2021-04-02 | 2021-04-02 | Electric drive type tractor CVT power assembly with mechanical through PTO structure |
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| Publication Number | Publication Date |
|---|---|
| CN217598331U true CN217598331U (en) | 2022-10-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120681696.4U Active CN217598331U (en) | 2021-04-02 | 2021-04-02 | Electric drive type tractor CVT power assembly with mechanical through PTO structure |
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|---|---|
| CN (1) | CN217598331U (en) |
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2021
- 2021-04-02 CN CN202120681696.4U patent/CN217598331U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230606 Address after: 537005 No. 88 flyover West Road, the Guangxi Zhuang Autonomous Region, Yulin Patentee after: Guangxi Yuchai Machinery Co.,Ltd. Address before: 537005 No. 88 flyover West Road, the Guangxi Zhuang Autonomous Region, Yulin Patentee before: Guangxi Yuchai Machinery Co.,Ltd. Patentee before: Shandong Yuchai Machinery Co.,Ltd. |