CN220500489U - Electrically driven stepless speed change tractor - Google Patents

Abstract

The utility model discloses an electrically-driven stepless speed change tractor which comprises a tractor front drive axle, a front drive transmission shaft assembly, a running system, an outer surface part, a working device, an engine and an energy storage element, wherein one end of the engine is connected with a range extender in series, one end of the range extender is connected with a main drive motor in series, and one end of the main drive motor is connected with a section gearbox in series. According to the utility model, the wheel side motor is arranged through the front wheel drive, the left wheel rotating speed and the right wheel rotating speed are controlled through the wheel side motor when the tractor turns, the turning radius is smaller, the turning efficiency is higher, the section gearbox adopts a 2-gear (high-gear and low-gear) gear shifting section, the whole machine is provided with the vehicle speed acquisition signal device, when the vehicle speed reaches a certain speed section, a signal is sent to the section gearbox gear shifting controller, and the gear shifting controller controls the electric push rod gear shifting lever to realize automatic gear shifting, so that the comprehensive operation efficiency is effectively improved.

Description

Electrically driven stepless speed change tractor

Technical Field

The utility model belongs to the technical field of tractors, and particularly relates to an electrically-driven stepless speed change tractor.

Background

After years of development, the tractor transmission technology starts to develop gradually to the stepless speed change technology after the technology of sliding gear shifting, meshing sleeve shifting, synchronizer shifting and power shifting is carried out successively.

The prior art small tractor mainly adopts the sliding gear shifting technology, the middle and large tractors adopt the meshing sleeve and the synchronizer to shift gears, the part adopts the power to shift gears, the number of tractors using stepless speed change is small, the mechanical gear shifting gearbox is complex in structure and large in noise, and the problems that the operation efficiency is low, the gear shifting position cannot be cut in the operation process, the electric control cannot be realized and the like also exist.

Disclosure of Invention

The present utility model provides an electrically driven continuously variable transmission tractor to solve the problems in the background art described above.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows: the utility model provides an electric drive infinitely variable speed tractor, includes tractor front drive axle, front drive transmission shaft assembly, traveling system, outward appearance spare and working arrangement, still includes engine and energy storage element, the one end of engine is established ties and is had the range extender, the one end of range extender is established ties and is had main driving motor, the one end of main driving motor is established ties and is had the district gearbox, the one end of district gearbox is established ties and is had the rear axle, the one end electric connection of generator has power take off, the output electric connection of energy storage element has power distribution unit, the both sides of power distribution unit respectively electric connection have range extender generator controller and multichannel interaction, range extender generator controller and generator electric connection, multichannel interaction and main driven motor electric connection, the outside electric connection of rear axle has the speed sensor, speed sensor electric connection has the gear shift controller, gear shift control and district gearbox electric connection.

The section gearbox is connected with a transfer case in a linear mode, and the transfer case is connected with a front axle in a linear mode.

The two driving parts of the front axle are respectively provided with a first wheel motor and a second wheel motor.

The beneficial effects of adopting above technical scheme are:

the transmission system in the tractor adopts a transmission mechanism of a series mode of an engine, a generator, a motor, a section gearbox and a rear axle, stepless speed change is realized through motor speed regulation, the output power of an engine flywheel is directly transmitted to a power output system of the tractor and controls the power output rotating speed, a main driving motor transmits power to a traveling system and controls the speed of the traveling system, the power output system and the traveling system independently operate and are completely decoupled, the section gearbox adopts a 2-gear (high-gear and low-gear) shifting section, the whole machine is provided with a vehicle speed acquisition signal device, when the vehicle speed reaches a certain speed section, the signal is sent to a section gearbox shifting controller, and the shifting controller controls an electric push rod shifting lever to realize automatic shifting, so that the comprehensive operation efficiency is effectively improved.

According to the utility model, the wheel side motor is arranged through the front wheel drive, and the left wheel and the right wheel are controlled to rotate through the wheel side motor when the tractor turns, so that smaller turning radius and higher turning efficiency can be realized.

According to the utility model, through the NVH (noise) control of the whole vehicle under the full working condition, the working of the range extender is associated with the working condition, so that the NVH problem in the working process of the range extender is solved, and the riding comfort is improved.

Drawings

FIG. 1 is a schematic view of the external structure of the present utility model;

FIG. 2 is a schematic diagram of the internal connections of the system of the present utility model;

FIG. 3 is a schematic view of the engine of the present utility model;

wherein:

1. tractor front drive axle; 2. a front drive shaft assembly; 3. a walking system; 4. an outer surface member; 5. a working device; 6. an energy storage element; 7. an engine; 8. a generator; 9. a main drive motor; 10. a segment gearbox; 11. a rear axle; 12. a power output; 13. a power distribution unit; 14. a range extender generator controller; 15. multi-channel interaction; 16. a vehicle speed sensor; 17. gear shifting control; 18. a transfer case; 19. a front axle; 20. a first wheel motor; 21. and a second wheel motor.

Detailed Description

The following detailed description of the embodiments of the utility model, given by way of example only, is presented in the accompanying drawings to aid in a more complete, accurate and thorough understanding of the concepts and aspects of the utility model, and to aid in its practice, by those skilled in the art.

As shown in figures 1 to 3, the utility model is an electrically driven stepless speed change tractor which has the advantages of mixed motion, energy saving, good acceleration, good starting performance, convenient reverse gear, excellent gear shifting, high cost performance and high transmission efficiency.

Specifically, as shown in fig. 1 to 3, the tractor comprises a tractor front drive axle 1, a front drive transmission shaft assembly 2, a traveling system 3, an outer surface member 4, a working device 5, an energy storage element 6 and an engine 7, wherein one end of the engine 7 is connected with a generator 8 in series, one end of the generator 8 is connected with a main drive motor 9 in series, one end of the main drive motor 9 is connected with a section gearbox 10 in series, one end of the section gearbox 10 is connected with a rear axle 11 in series, one end of the engine 7 is electrically connected with a power output 12, the output end of the energy storage element 6 is electrically connected with a power distribution unit 13, two sides of the power distribution unit 13 are respectively electrically connected with a range extender generator controller 14 and a multi-channel interaction 15, the range extender generator controller 14 is electrically connected with the generator 8, the multi-channel interaction 15 is electrically connected with the main drive motor 9, the outside of the rear axle 11 is electrically connected with a vehicle speed sensor 16, the vehicle speed sensor 16 is electrically connected with a gear shift controller 17, and the gear shift controller 17 is electrically connected with the section gearbox 10.

The range gearbox 10 is linearly connected with a transfer case 18, and the transfer case 18 is linearly connected with a front axle 19.

The two driving members of the front axle 19 are provided with a first rim motor 20 and a second rim motor 21, respectively.

The following describes specific modes of operation with specific examples:

example 1

The transmission system adopts a transmission mechanism of a series mode of an engine, a generator, a motor, a section gearbox and a rear axle, stepless speed change is realized through motor speed regulation, the section gearbox adopts a 2-gear (high-gear and low-gear) shift interval, the whole machine is provided with a vehicle speed acquisition signal device, when the vehicle speed reaches a certain speed interval, the signal is sent to a section gearbox shift controller, the shift controller controls an electric push rod shift lever to realize automatic shift, a front wheel drive is provided with a wheel motor, and the left wheel rotation speed and the right wheel rotation speed are controlled through the wheel motor when the tractor turns.

Example 2

The tractor power transmission system control mode is as follows:

mode 1: the range extender is in a stop mode, and when the electric quantity of the power battery is sufficient, the range extender stops, and the driving motor takes electricity from the power battery to drive the vehicle;

mode 2: in the power following mode, when the electric quantity of the power battery is middle, the range extender works, and electricity is directly taken for the driving motor to use, so that efficiency conversion is reduced without passing through the power battery;

mode 3: in a driving charging mode, the electric quantity of the power battery is low, the range extender works, and meanwhile, the power battery is charged and the vehicle is driven;

mode 4: in the power enhancement mode, when the requirements of the rapid acceleration or climbing working conditions are high in power, the range extender does not drive the motor and simultaneously provides energy to drive the vehicle, so that the power requirements are met.

While the utility model has been described above by way of example with reference to the accompanying drawings, it is to be understood that the utility model is not limited to the particular embodiments described, but is capable of numerous insubstantial modifications of the inventive concept and solution; or the utility model is not improved, and the conception and the technical scheme are directly applied to other occasions and are all within the protection scope of the utility model.

Claims (3)

1. The utility model provides an electric drive infinitely variable speed tractor, includes tractor front drive axle (1), front drive transmission shaft assembly (2), traveling system (3), outward appearance piece (4) and working device (5), its characterized in that: still include energy storage element (6) and engine (7), the one end of engine (7) is established ties and is had generator (8), the one end of generator (8) is established ties and is had main driving motor (9), the one end of main driving motor (9) is established ties and is had district gearbox (10), the one end of district gearbox (10) is established ties and is had rear axle (11), the one end electric connection of engine (7) has power take off (12), the output electric connection of energy storage element (6) has power distribution unit (13), the both sides of power distribution unit (13) are electric connection respectively has journey extender generator controller (14) and multichannel interaction (15), journey extender generator controller (14) and generator (8) electric connection, multichannel interaction (15) and main driving motor (9) electric connection, rear axle (11) outside electric connection has speed sensor (16), speed sensor (16) electric connection has shift controller (17), controller (17) and district gearbox (10) electric connection.

2. An electrically driven continuously variable transmission tractor as claimed in claim 1, wherein: the section gearbox (10) is linearly connected with a transfer case (18), and the transfer case (18) is linearly connected with a front axle (19).

3. An electrically driven continuously variable transmission tractor as claimed in claim 2, wherein: the two driving parts of the front axle (19) are respectively provided with a first wheel motor (20) and a second wheel motor (21).