CN210566059U

CN210566059U - Tractor space parallel double-clutch power gear shifting assembly

Info

Publication number: CN210566059U
Application number: CN201921320105.XU
Authority: CN
Inventors: 陈奇
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-08-14
Filing date: 2019-08-14
Publication date: 2020-05-19
Anticipated expiration: 2029-08-14

Abstract

The utility model belongs to the technical field of the tractor transmission, especially, relate to a parallelly connected double clutch power assembly of shifting in tractor space, including input shafting, output shafting, the fender shafting and the reverse gear shafting of advancing, the fender shafting of advancing is including the fender driving shaft that advances and the fender driven shaft that advances, the fender driving shaft that advances is connected through the clutch unit transmission between the fender driven shaft with advancing, reverse gear shafting is including reverse gear driving shaft and reverse gear driven shaft, be connected through the clutch unit transmission between reverse gear driving shaft and the reverse gear driven shaft, the fender driven shaft that advances and reverse gear driven shaft are respectively through synchronous rotation of synchronizer unit and corresponding high-speed driving gear or low-speed driving gear. The utility model discloses an advanced two separation and reunion techniques, by two fender position of a clutch unit control, reduced the quantity of clutch unit, greatly reduced the inertia of transmission, improved transmission efficiency, reduced the oil consumption, owing to reduced spare part quantity, reduced the cost of complete machine.

Description

Tractor space parallel double-clutch power gear shifting assembly

Technical Field

The utility model belongs to the technical field of the tractor transmission, especially, relate to a parallelly connected two separation and reunion power in tractor space assembly of shifting.

Background

The power gear shifting and stepless gear shifting transmission technology is a key development project of the development strategy of China 2025.

The product is characterized in that:

the operation efficiency is high, and the energy consumption is low;

due to the introduction of hydraulic pressure and electric control, the gear shifting is smooth, comfortable and low in noise;

the Controller (TCU) of the gearbox, the controller (ECU) of the engine and the tractor controller (VCU) are connected through the ISO BUS, and data information interconnection and intercommunication are achieved. The tractor can realize the best energy-saving operation, the accurate operation and the high-efficiency operation at any time and under any load and any environment.

At present, in Europe and America, tractors with more than 100 horsepower basically adopt a power gear shifting or stepless speed change technology. However, the mastery of the technology is limited at present in China, and more than 95% of domestic tractors adopt the traditional mechanical gear shifting mode. Even though some companies developed power-shifting tractors, their technology was only on the 70-80 s of europe and america.

The Chinese power gear shifting technology mainly comprises the following steps:

1. the tractor with less than 200 horsepower is still mainly shifted by high-speed power and low-speed power. The advantages of high efficiency and energy conservation of power gear shifting can not be fully exerted in the field/transportation operation of the tractor.

2. The power gear shifting is still realized by single clutch, one clutch only drives a pair of gears to complete the change of a speed ratio, and the required parts are large in quantity and large in occupied space.

3. The multi-speed power shifting chassis assembly still relies on the intake. At present, a host factory in China mainly purchases a power gear shifting chassis assembly with more than 3 speeds through French companies and ZF. These imported products are mainly characterized by high cost, poor quality of service, and difficulty in long-term support for the production and sale of power-shift tractors.

4. Although large-scale enterprises in China develop power gear shifting technology from 2005, technical breakthroughs and technical innovations are still not realized so far. There is a considerable gap from intelligent automatic gear shifting.

Disclosure of Invention

The utility model discloses a to foretell development current situation, provide a same shafting possess fender position, spare part of two different drive ratios less, the cost is lower, occupy the little and the parallelly connected two separation and reunion power in tractor space assembly of shifting of light in whole weight in space.

In order to realize the purpose, the utility model discloses the technical scheme who adopts is:

the tractor space parallel double-clutch power gear shifting assembly comprises an input shaft system, an output shaft system, a forward gear shaft system and a reverse gear shaft system, wherein the input shaft system comprises an input shaft and a normally engaged driving gear sleeved on the input shaft, the output shaft system comprises an output shaft and a high-speed driven gear and a low-speed driven gear sleeved on the output shaft, the forward gear shaft system comprises a forward gear driving shaft and a forward gear driven shaft which are arranged on the same axis, the forward gear driving shaft and the forward gear driven shaft are in transmission connection through a forward gear clutch unit, the forward gear driving shaft is sleeved with a normally engaged driven gear engaged with the normally engaged driving gear, the forward gear driven shaft is in transmission connection with a forward gear high-speed driving gear engaged with the high-speed driven gear and a forward gear low-speed driving gear engaged with the low-speed driven gear, and the transmission ratio of the forward gear high-speed driving gear to the high-speed driven gear is The forward gear driven shaft synchronously rotates with the forward gear high-speed driving gear or the forward gear low-speed driving gear through the forward gear synchronizer unit; the reverse gear shafting is including reversing gear idler shaft, and reverse gear driving shaft and the reverse gear driven shaft that same axis set up, reverse gear driving shaft and reverse gear driven shaft between be connected through reverse gear clutch unit transmission, the last cover of reverse gear idler shaft is equipped with the idler with the meshing of constant mesh driving gear, the last cover of reverse gear driving shaft is equipped with the reverse gear driven gear with the idler meshing, it is connected with the reverse gear high-speed driving gear with high-speed driven gear meshing to rotate on the reverse gear driven shaft, and with the reverse gear low-speed driving gear of low-speed driven gear meshing, the transmission ratio of reverse gear high-speed driving gear and high-speed driven gear is less than the transmission ratio of reverse gear low-speed driving gear and low-speed driven gear, reverse gear driven shaft passes through reverse gear synchronizer unit and reverses gear high-speed driving gear or reverse gear low-speed driving.

In the tractor space parallel double-clutch power gear shifting assembly, more than two forward gear systems are arranged, the axes of the forward gear driving shaft and the reverse gear driving shaft are circumferentially distributed around the axis of the input shaft, and the axis of the output shaft and the axis of the input shaft are positioned on the same straight line.

In the tractor space parallel connection double-clutch power gear shifting assembly, the number of the normally meshed driving gears corresponds to the number of the forward gear shafts one by one, the normally meshed driving gears are meshed and connected with the normally meshed driven gears corresponding to the forward gear shafts to form a transmission set, the transmission ratio of each transmission set is gradually reduced towards the direction of the output shaft along the axial direction of the input shaft, and the idler wheel is meshed and connected with one of the normally meshed driving gears.

In the spatial parallel double-clutch power gear shifting assembly of the tractor, the forward gear shaft system is provided with three forward first shaft systems, three forward second shaft systems and three forward third shaft systems, the constant mesh driving gear is provided with three first constant mesh driving gears, three second constant mesh driving gears and three third constant mesh driving gears, the first constant mesh driving gear is meshed with a constant mesh driven gear of the forward first shaft system, the second constant mesh driving gear is meshed with a constant mesh driven gear of the forward second shaft system, the third constant mesh driving gear is meshed with a constant mesh driven gear of the forward third shaft system, and the idler is meshed with the first constant mesh driving gear; the forward gear high-speed driving gear of the forward first shafting, the forward gear high-speed driving gear of the forward second shafting, the forward gear high-speed driving gear of the forward third shafting and the reverse gear high-speed driving gear are all meshed with the high-speed driven gear; the forward gear low-speed driving gear of the forward first shafting, the forward gear low-speed driving gear of the forward second shafting, the forward gear low-speed driving gear of the forward third shafting and the reverse gear low-speed driving gear are all meshed with the low-speed driven gear.

In the spatial parallel double-clutch power gear shifting assembly for the tractor, the axes of the forward drive shaft of the forward first shafting, the forward drive shaft of the forward second shafting, and the forward drive shaft of the forward third shafting and the reverse drive shaft are distributed in a quadrilateral manner, and the axes of the forward drive driven shaft of the forward first shafting, the forward drive driven shaft of the forward second shafting, and the forward drive driven shaft of the forward third shafting and the reverse drive shaft are also distributed in a corresponding quadrilateral manner.

In the spatial parallel double-clutch power gear shifting assembly of the tractor, the forward gear clutch unit comprises a forward gear driving hub and a forward gear driven hub, the forward gear driving hub is fixedly arranged on the forward gear driving shaft, the forward gear driven hub is fixedly arranged on the forward gear driven shaft, the reverse gear clutch unit comprises a reverse gear driving hub and a reverse gear driven hub, the reverse gear driving hub is fixedly arranged on the reverse gear driving shaft, and the reverse gear driven hub is fixedly arranged on the reverse gear driven shaft.

In the tractor space parallel double-clutch power gear shifting assembly, the forward driving shaft and the forward driven shaft and the reverse driving shaft and the reverse driven shaft are rotatably connected through shaft sleeves.

In the tractor space parallel double-clutch power gear shifting assembly, the input shaft and the output shaft are rotationally connected through a shaft sleeve.

In the tractor space parallel double-clutch power gear shifting assembly, the tractor space parallel double-clutch power gear shifting assembly further comprises a transmission case, and the input shaft system, the output shaft system, the forward gear shaft system and the reverse gear shaft system are all arranged on the transmission case.

After the structure is adopted, compared with the prior art, the utility model the advantage that has is:

1. the utility model adopts the advanced double-clutch technology, only one gear can be controlled by one clutch unit in the prior art, two gears are controlled by one clutch unit, the number of the clutch units is reduced, the rotational inertia of a transmission system is greatly reduced, the transmission efficiency is improved, the oil consumption is reduced, and the cost of the whole machine is reduced due to the reduction of the number of parts;

2. the forward gear shaft system and the reverse gear shaft system are arranged in parallel with the corresponding driving shaft and the corresponding driven shaft and are arranged in a specific rectangular space, so that the structure is more compact, the volume is smaller, and the space is saved;

3. the utility model discloses only install a clutch unit, a synchronizer unit and a plurality of relevant gear between each driving shaft that advances to keep off and the driven shaft that keeps off backward between driving shaft and the driven shaft that keeps off backward, compare and install a plurality of clutches and a plurality of relevant gear on an axle, its length of effective short axle that contracts makes transmission stability better, and assembly efficiency is high moreover, easily later maintenance;

3. the utility model discloses each clutch unit and synchronizer unit are controlled according to logic instruction through the control assembly to realize intelligent automatic gearshift function.

Drawings

FIG. 1 is a schematic view of the power transmission of the assembly of the present invention;

FIG. 2 is an expanded view of the assembly structure of the present invention;

fig. 3 is a schematic diagram of the spatial arrangement of the wheel train of the present invention.

In the figure: 1. an input shaft; 2. an output shaft; 3. a high speed driven gear; 4. a low speed driven gear; 5. a reverse gear idler shaft; 6. reverse gear of the driving shaft; 7. a reverse gear driven shaft; 8. an idler pulley; 9. a reverse driven gear; 10. a reverse clutch unit; 11. a reverse high speed drive gear; 12. a reverse low speed drive gear; 13. a reverse gear synchronizer unit; 14. a first normally meshed drive gear; 15. a second normally meshed drive gear; 16. a third normally meshed drive gear; 17. a forward gear driving shaft of a forward shafting; 18. a constant mesh driven gear advancing a shafting; 19. a forward gear driven shaft of a forward shafting; 20. a forward gear clutch unit of a forward shafting; 21. a forward gear high-speed driving gear of a forward shafting; 22. a forward gear low-speed driving gear of a forward shafting; 23. a forward gear synchronizer unit for a forward shafting; 24. a forward gear driving shaft of a forward two-axis system; 25. a constant mesh driven gear of the forward two-axis system; 26. a forward gear driven shaft of a forward two-axis system; 27. a forward gear clutch unit of a forward two-axis system; 28. a forward gear high-speed driving gear of a forward two-axis system; 29. a forward gear low-speed driving gear of a forward two-axis system; 30. a forward gear synchronizer unit of a forward two-axis system; 31. a forward gear driving shaft of a forward three-axis system; 32. a constant-meshed driven gear of a forward three-shaft system; 33. a forward gear driven shaft of a forward three-axis system; 34. a forward gear clutch unit of a forward three-axis system; 35. a forward gear high-speed driving gear of a forward three-axis system; 36. a forward gear low-speed driving gear of a forward three-axis system; 37. a forward gear synchronizer unit of a forward three-axis system; 38. a forward gear driving hub of a forward shafting; 39. a forward gear driven hub of a forward shafting; 40. a forward gear driving hub of a forward two-axis system; 41. a forward gear driven hub of a forward two-axis system; 42. a forward gear driving hub of a forward three-shaft system; 43. a forward gear driven hub of a forward three-shaft system; 44. a reverse drive hub; 45. a reverse driven hub; 46. a gearbox housing.

Detailed Description

The following description is only for the preferred embodiment of the present invention, and the protection scope of the present invention is not limited thereby, the present invention will be further explained with reference to the drawings and the embodiments, and refer to fig. 1 to 3:

the tractor space parallel double-clutch power gear shifting assembly comprises an input shaft system, an output shaft system, a forward gear shaft system and a reverse gear shaft system, wherein the input shaft system comprises an input shaft 1 and a normally meshed driving gear sleeved on the input shaft 1, the output shaft system comprises an output shaft 2, a high-speed driven gear 3 and a low-speed driven gear 4 sleeved on the output shaft 2, the forward gear shaft system comprises a forward gear driving shaft and a forward gear driven shaft which are arranged on the same axis, the forward gear driving shaft and the forward gear driven shaft are in transmission connection through a forward gear clutch unit, the forward gear driving shaft is sleeved with a normally meshed driven gear meshed with the normally meshed driving gear, the reverse gear shaft system comprises a reverse gear idler shaft 5 and a reverse gear driving shaft 6 and a reverse gear driven shaft 7 which are arranged on the same axis, and the reverse gear driving shaft 6 and the reverse gear driven shaft 7 are in transmission connection through a reverse gear clutch unit, the reverse gear idler shaft 5 is sleeved with an idler wheel 8 meshed with the normally meshed driving gear, and the reverse gear driving shaft 6 is sleeved with a reverse gear driven gear 9 meshed with the idler wheel 8;

the forward gear driven shaft is in transmission connection with a forward gear high-speed driving gear meshed with the high-speed driven gear 3 and a forward gear low-speed driving gear meshed with the low-speed driven gear 4, the transmission ratio of the high-speed driving gear corresponding to the forward gear and the high-speed driven gear 3 is smaller than that of the low-speed driving gear corresponding to the forward gear and the low-speed driven gear 4, and the forward gear driven shaft synchronously rotates with the forward gear high-speed driving gear or the forward gear low-speed driving gear through a forward gear synchronizer unit;

the reverse driven shaft 7 is in transmission connection with a reverse high-speed driving gear 11 meshed with the high-speed driven gear 3 and a reverse low-speed driving gear 12 meshed with the low-speed driven gear 4, the transmission ratio of the reverse high-speed driving gear 11 to the high-speed driven gear 3 is smaller than that of the reverse low-speed driving gear 12 to the low-speed driven gear 4, and the reverse driven shaft 7 rotates synchronously with the reverse high-speed driving gear 11 or the reverse low-speed driving gear 12 through a reverse synchronizer unit 13.

Further, in order to make the utility model discloses can possess a plurality of powers and keep off the position of advancing, it is provided with more than two to advance to keep off the shafting, and simultaneously, each shafting carries out space parallel arrangement, and its axis that keeps off driving shaft and reverse gear driving shaft 6 that advances distributes around the axis circumference of input shaft 1, and output shaft 2's axis and input shaft 1's axis are located same straight line to make overall structure compacter, effectively improve driven stability and transmission efficiency.

Therefore, the utility model has a plurality of forward gear shafting and a reverse gear shafting, and realizes the transmission switching between different shafting by controlling the separation or combination of the forward gear clutch unit of one of the forward gear shafting or the reverse gear clutch unit 10 of the reverse gear shafting; meanwhile, the transmission switching of the high-speed gear and the low-speed gear in the same shafting is realized by controlling the corresponding synchronizer units in the same shafting to be connected with the corresponding high-speed driving gear or low-speed driving gear. In addition, because the component structure of each shafting is similar, easily the equipment and the maintenance of later stage.

Furthermore, the number of the normally meshed driving gears corresponds to the number of the forward gear shafts one to one, the normally meshed driving gears are meshed and connected with the normally meshed driven gears corresponding to the forward gear shafts to form a transmission set, and the transmission ratio of each transmission set is gradually reduced towards the direction of the output shaft 2 along the axial direction of the input shaft 1, so that the transmission ratios of the forward gear shafts are different.

Meanwhile, in order to save the number of parts and reduce the cost, the idler 8 is meshed with one of the normally meshed driving gears, the high-speed driving gear of each shaft system is meshed with the same high-speed driven gear 3, and the low-speed driving gear is meshed with the same low-speed driven gear 4, so that the whole structure is further compact, the axial length of each shaft system is shortened, and the rigidity is enhanced.

In this embodiment, the forward gear shaft system is provided with three forward first shaft system, three forward second shaft system and three forward third shaft system, the constant mesh driving gear is provided with three first constant mesh driving gear 14, three second constant mesh driving gear 15 and three third constant mesh driving gear 16, the first constant mesh driving gear 14 is meshed with the constant mesh driven gear 18 of the forward first shaft system, the second constant mesh driving gear 15 is meshed with the constant mesh driven gear 25 of the forward second shaft system, the third constant mesh driving gear 16 is meshed with the constant mesh driven gear 32 of the forward third shaft system, and the idle gear 8 is meshed with the first constant mesh driving gear 14 and the reverse gear driven gear 9 respectively.

Meanwhile, the forward gear high-speed driving gear 21 of the forward first shafting, the forward gear high-speed driving gear 28 of the forward second shafting, the forward gear high-speed driving gear 35 of the forward third shafting and the reverse gear high-speed driving gear 11 are all meshed with the high-speed driven gear 3; the forward-range low-speed drive gear 22 of the forward first-stage system, the forward-range low-speed drive gear 29 of the forward second-stage system, the forward-range low-speed drive gear 36 of the forward third-stage system, and the reverse low-speed drive gear 12 are engaged with the low-speed driven gear 4.

The axes of the forward gear driving shaft 17 of the forward first axis, the forward gear driving shaft 24 of the forward second axis, the forward gear driving shaft 31 of the forward third axis and the reverse gear driving shaft 6 are distributed in a quadrilateral shape; meanwhile, the axes of the forward gear driven shaft 19 of the forward first axis system, the forward gear driven shaft 26 of the forward second axis system, the forward gear driven shaft 33 of the forward third axis system and the reverse gear driven shaft 7 are also distributed in a quadrilateral shape. The input shaft 1 and the output shaft 2 are positioned in the center of a quadrangle, the structure of the quadrangle spatial arrangement is stable, the required axial length is small, and the length of the chassis is controllable.

Furthermore, the forward gear clutch unit comprises a forward gear driving hub and a forward gear driven hub, the forward gear driving hub is fixedly arranged on the forward gear driving shaft, the forward gear driven hub is fixedly arranged on the forward gear driven shaft, and the forward gear clutch unit realizes the separation or combination of the forward gear driving shaft and the forward gear driven shaft by controlling the separation or combination of the forward gear driving hub and the forward gear driven hub;

therefore, in the present embodiment, the forward gear clutch unit 20 of the forward-one shafting includes the forward gear driving hub 38 of the forward-one shafting and the forward gear driven hub 39 of the forward-one shafting, the forward gear driving hub 38 of the forward-one shafting is arranged on the forward driving shaft 17 of the forward-one shafting, and the forward gear driven hub 39 of the forward-one shafting is arranged on the forward driven shaft 19 of the forward-one shafting;

the forward gear clutch unit 27 of the forward two-shaft system comprises a forward gear driving hub 40 of the forward two-shaft system and a forward gear driven hub 41 of the forward two-shaft system, wherein the forward gear driving hub 40 of the forward two-shaft system is arranged on a forward driving shaft 24 of the forward two-shaft system, and the forward gear driven hub 41 of the forward two-shaft system is arranged on a forward driven shaft 26 of the forward two-shaft system;

the forward gear clutch unit 34 of the forward three-shaft system includes a forward gear driving hub 42 of the forward three-shaft system and a forward gear driven hub 43 of the forward three-shaft system, the forward gear driving hub 42 of the forward three-shaft system is arranged on the forward driving shaft 31 of the forward three-shaft system, and the forward gear driven hub 43 of the forward three-shaft system is arranged on the forward driven shaft 33 of the forward three-shaft system.

The reverse gear clutch unit 10 comprises a reverse gear driving hub 44 and a reverse gear driven hub 45, the reverse gear driving hub 44 is fixedly arranged on the reverse gear driving shaft 6, the reverse gear driven hub 45 is fixedly arranged on the reverse gear driven shaft 7, and the reverse gear clutch unit 10 controls the reverse gear driving hub 44 and the reverse gear driven hub 45 to be separated or combined so as to realize the separation or combination between the reverse gear driving shaft 6 and the reverse gear driven shaft 7.

In order to ensure that the axes of the forward driving shaft and the forward driven shaft are positioned on the same straight line, and the axes of the reverse driving shaft 6 and the reverse driven shaft 7 are positioned on the same straight line, the forward driving shaft and the forward driven shaft, and the reverse driving shaft 6 and the reverse driven shaft 7 are rotatably connected through shaft sleeves.

In order to ensure that the axis of the input shaft 1 and the axis of the output shaft 2 are on the same straight line, the input shaft 1 and the output shaft 2 are rotationally connected through a shaft sleeve.

In addition, the transmission case 46 is further included, and the input shaft system, the output shaft system, the forward gear shaft system and the reverse gear shaft system are all arranged on the transmission case 46. The forward gear clutch unit, the forward gear synchronizer unit, the reverse gear clutch unit 10 and the reverse gear synchronizer unit 13 are centrally positioned in the gearbox shell 46, so that all clutch control valves and synchronizer control valves are integrated on one hydraulic valve block (the hydraulic valve block is arranged on the shell), the hydraulic valve block is electrically connected with the control assembly, and the control assembly controls the hydraulic valve block to implement effective gear shifting control according to logic instructions. In the embodiment, eight control valves of three forward gear shafting and one reverse gear shafting are integrated on the same hydraulic valve block to respectively control four clutch units and four synchronizer units, so that the oil path of the whole hydraulic oil is effectively shortened, the loss of hydraulic pressure is reduced, and the control precision is improved; meanwhile, each clutch unit is assembled into a closed independent component in the embodiment, which is beneficial to controlling the cleanness inside the gearbox shell 46, ensuring the working performance of each clutch unit and synchronizer unit, prolonging the service life of the transmission part in the gearbox shell 46 and improving the reliability of the assembly.

The power transmission route of the embodiment is as follows:

forward-shafting high-speed gear transmission route: the input shaft 1 → the first constant mesh driving gear 14 → the constant mesh driven gear 18 of the forward shafting → the forward drive shaft 17 of the forward shafting → the forward clutch unit 20 of the forward shafting → the forward driven shaft 19 of the forward shafting → the forward synchronizer unit 23 of the forward shafting → the forward high-speed driving gear 21 of the forward shafting → the high-speed driven gear 3 → the output shaft 2, and at this time, only the forward clutch unit 20 of the forward shafting is engaged, the forward clutch units of the other shafting and the reverse clutch unit 10 are in a disengaged state, and the forward synchronizer unit 23 of the forward shafting is engaged with the forward high-speed driving gear 21 of the forward shafting;

forward shafting low-speed gear transmission route: the input shaft 1 → the first constant mesh driving gear 14 → the constant mesh driven gear 18 of the forward one shafting → the forward gear driving shaft 17 of the forward one shafting → the forward gear clutch unit 20 of the forward one shafting → the forward gear driven shaft 19 of the forward one shafting → the forward gear synchronizer unit 23 of the forward one shafting → the forward gear low-speed driving gear 22 of the forward one shafting → the low-speed driven gear 4 → the output shaft 2, and at this time, only the forward gear clutch unit 20 of the forward one shafting is engaged, the forward gear clutch units of the other shafting and the reverse gear clutch unit 10 are in a disengaged state, and the forward gear synchronizer unit 23 of the forward one shafting is engaged with the forward gear low-speed driving gear 22 of the forward one shafting;

the transmission route of the forward two-shafting high-speed gear is as follows: the input shaft 1 → the second constant mesh driving gear 15 → the constant mesh driven gear 25 of the forward two shafting → the forward drive shaft 24 of the forward two shafting → the forward clutch unit 27 of the forward two shafting → the forward driven shaft 26 of the forward two shafting → the forward synchronizer unit 30 of the forward two shafting → the forward high-speed driving gear 28 of the forward two shafting → the high-speed driven gear 3 → the output shaft 2, and at this time, only the forward clutch unit 27 of the forward two shafting is engaged, the forward clutch units of the other shafting and the reverse clutch unit 10 are in a disengaged state, and the forward synchronizer unit 30 of the forward two shafting is engaged with the forward high-speed driving gear 28 of the forward two shafting;

the two-axis system low-speed gear transmission route: the input shaft 1 → the second constant mesh driving gear 15 → the constant mesh driven gear 25 of the forward two shafting → the forward drive shaft 24 of the forward two shafting → the forward clutch unit 27 of the forward two shafting → the forward driven shaft 26 of the forward two shafting → the forward synchronizer unit 30 of the forward two shafting → the forward low-speed driving gear 29 of the forward two shafting → the low-speed driven gear 4 → the output shaft 2, and at this time, only the forward clutch unit 27 of the forward two shafting is engaged, the forward clutch units of the other shafting and the reverse clutch unit 10 are in a disengaged state, and the forward synchronizer unit 30 of the forward two shafting is engaged with the forward low-speed driving gear 29 of the forward two shafting;

the forward three-shafting high-speed gear transmission route is as follows: the input shaft 1 → the third constant mesh driving gear 16 → the constant mesh driven gear 32 of the forward three shaft system → the forward drive shaft 31 of the forward three shaft system → the forward clutch unit 34 of the forward three shaft system → the forward driven shaft 33 of the forward three shaft system → the forward synchronizer unit 37 of the forward three shaft system → the forward high-speed driving gear 35 of the forward three shaft system → the high-speed driven gear 3 → the output shaft 2, and at this time, only the forward clutch unit 34 of the forward three shaft system is engaged, the forward clutch units of the other shaft systems and the reverse clutch unit 10 are in a disengaged state, and the forward synchronizer unit 37 of the forward three shaft system is engaged with the forward high-speed driving gear 35 of the forward three shaft system;

low-speed gear transmission route of three advancing systems: the input shaft 1 → the third constant mesh driving gear 16 → the constant mesh driven gear 32 of the forward three shaft system → the forward drive shaft 31 of the forward three shaft system → the forward clutch unit 34 of the forward three shaft system → the forward driven shaft 33 of the forward three shaft system → the forward synchronizer unit 37 of the forward three shaft system → the forward low-speed driving gear 36 of the forward three shaft system → the low-speed driven gear 4 → the output shaft 2, and at this time, only the forward clutch unit 34 of the forward three shaft system is engaged, the forward clutch units of the other shaft systems and the reverse clutch unit 10 are in a disengaged state, and the forward synchronizer unit 37 of the forward three shaft system is engaged with the forward low-speed driving gear 36 of the forward three shaft system;

the reverse gear shafting high-speed gear transmission route: the input shaft 1 → the first normally meshed drive gear 14 → the idler gear 8 → the reverse driven gear 9 → the reverse drive shaft 6 → the reverse clutch unit 10 → the reverse driven shaft 7 → the reverse synchronizer unit 13 → the reverse high-speed drive gear 11 → the high-speed driven gear 3 → the output shaft 2, at which time only the reverse clutch unit 10 is engaged, all the forward clutch units are in a disengaged state, and the reverse synchronizer unit 13 is engaged with the reverse high-speed drive gear 11;

the reverse gear shafting high-speed gear transmission route: the input shaft 1 → the first normally meshed drive gear 14 → the idler gear 8 → the reverse driven gear 9 → the reverse drive shaft 6 → the reverse clutch unit 10 → the reverse driven shaft 7 → the reverse synchronizer unit 13 → the reverse low-speed drive gear 12 → the low-speed driven gear 4 → the output shaft 2, at which time only the reverse clutch unit 10 is engaged, all the forward clutch units are in a disengaged state, and the reverse synchronizer unit 13 is engaged with the reverse low-speed drive gear 12;

the above-mentioned embodiment is only the utility model discloses an one of the preferred embodiment (space multiaxis parallelogram double clutch power shift structure) is not with this restriction the utility model discloses an implement scope (space multiaxis parallel connection polygon double clutch power shift structure), the event: all equivalent changes made according to the shape, structure and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. Tractor space connects in parallel two separation and reunion power assembly of shifting, its characterized in that: the device comprises an input shaft system, an output shaft system, a forward gear shaft system and a reverse gear shaft system, wherein the input shaft system comprises an input shaft (1) and a normally engaged driving gear sleeved on the input shaft (1), the output shaft system comprises an output shaft (2) and a high-speed driven gear (3) and a low-speed driven gear (4) sleeved on the output shaft (2), the forward gear shaft system comprises a forward gear driving shaft and a forward gear driven shaft which are arranged on the same axis, the forward gear driving shaft and the forward gear driven shaft are in transmission connection through a forward gear clutch unit, the forward gear driving shaft is sleeved with a normally engaged driven gear engaged with the normally engaged driving gear, the forward gear driven shaft is in transmission connection with a forward gear high-speed driving gear engaged with the high-speed driven gear (3) and a forward gear low-speed driving gear engaged with the low-speed driven gear (4), the forward gear driven shaft rotates synchronously with the forward gear high-speed driving gear or the forward gear low-speed driving gear through the forward gear synchronizer unit; the reverse gear shaft system comprises a reverse gear idler shaft (5), a reverse gear driving shaft (6) and a reverse gear driven shaft (7) which are arranged on the same axis, the reverse gear driving shaft (6) and the reverse gear driven shaft (7) are in transmission connection through a reverse gear clutch unit (10), the reverse gear idler shaft (5) is sleeved with an idler (8) meshed with a normally meshed driving gear, the reverse gear driving shaft (6) is sleeved with a reverse gear driven gear (9) meshed with the idler (8), the reverse gear driven shaft (7) is rotatably connected with a reverse gear high-speed driving gear (11) meshed with a high-speed driven gear (3) and a reverse gear low-speed driving gear (12) meshed with a low-speed driven gear (4), the reverse gear driven shaft (7) rotates synchronously with the reverse gear high-speed driving gear (11) or the reverse gear low-speed driving gear (12) through a reverse gear synchronizer unit (13).

2. The tractor space parallel double-clutch power shift assembly according to claim 1, characterized in that: the front gear shaft system is provided with more than two front gear driving shafts and the back gear driving shafts (6), the axes of the front gear driving shafts and the back gear driving shafts are circumferentially distributed around the axis of the input shaft (1), and the axis of the output shaft (2) and the axis of the input shaft (1) are positioned on the same straight line.

3. The tractor space parallel double-clutch power shift assembly according to claim 2, characterized in that: the number of the normally meshed driving gears corresponds to the number of the forward gear shaft systems one by one, the normally meshed driving gears are meshed and connected with the normally meshed driven gears corresponding to the forward gear shaft systems to form a transmission set, the transmission ratio of each transmission set is gradually reduced towards the direction of the output shaft (2) along the axial direction of the input shaft (1), and the idler wheel (8) is meshed and connected with one of the normally meshed driving gears.

4. The tractor space parallel double-clutch power shift assembly according to claim 3, characterized in that: the forward gear shaft system is provided with three forward first shaft systems, three forward second shaft systems and three forward third shaft systems, the constant mesh driving gear is provided with three first constant mesh driving gears (14), three second constant mesh driving gears (15) and three third constant mesh driving gears (16), the first constant mesh driving gear (14) is meshed with a constant mesh driven gear (18) of the forward first shaft system, the second constant mesh driving gear (15) is meshed with a constant mesh driven gear (25) of the forward second shaft system, the third constant mesh driving gear (16) is meshed with a constant mesh driven gear (32) of the forward third shaft system, and the idler (8) is meshed with the first constant mesh driving gear (14) and the reverse gear driven gear (9) respectively; a forward gear high-speed driving gear (21) of a forward first shaft system, a forward gear high-speed driving gear (28) of a forward second shaft system, a forward gear high-speed driving gear (35) of a forward third shaft system and a reverse gear high-speed driving gear (11) are all meshed with the high-speed driven gear (3); the forward gear low-speed driving gear (22) of the forward first shafting, the forward gear low-speed driving gear (29) of the forward second shafting, the forward gear low-speed driving gear (36) of the forward third shafting and the reverse gear low-speed driving gear (12) are all meshed with the low-speed driven gear (4).

5. The tractor space parallel double-clutch power shift assembly according to claim 4, characterized in that: the axes of the forward gear driving shaft (17) of the forward first shaft system, the forward gear driving shaft (24) of the forward second shaft system, the forward gear driving shaft (31) of the forward third shaft system and the reverse gear driving shaft (6) are distributed in a quadrilateral mode, and the axes of the forward gear driven shaft (19) of the forward first shaft system, the forward gear driven shaft (26) of the forward second shaft system, the forward gear driven shaft (33) of the forward third shaft system and the reverse gear driven shaft (7) are also distributed in a corresponding quadrilateral mode.

6. The tractor space parallel double-clutch power shift assembly according to claim 1, characterized in that: the forward gear clutch unit comprises a forward gear driving hub and a forward gear driven hub, the forward gear driving hub is fixedly arranged on a forward gear driving shaft, the forward gear driven hub is fixedly arranged on a forward gear driven shaft, the reverse gear clutch unit (10) comprises a reverse gear driving hub (44) and a reverse gear driven hub (45), the reverse gear driving hub (44) is fixedly arranged on the reverse gear driving shaft (6), and the reverse gear driven hub (45) is fixedly arranged on the reverse gear driven shaft (7).

7. The tractor space parallel double-clutch power shift assembly according to claim 1, characterized in that: the forward gear driving shaft and the forward gear driven shaft are rotationally connected through shaft sleeves, and the reverse gear driving shaft (6) and the reverse gear driven shaft (7) are rotationally connected through shaft sleeves.

8. The tractor space parallel double-clutch power shift assembly according to claim 2, characterized in that: the input shaft (1) is rotatably connected with the output shaft (2) through a shaft sleeve.

9. The tractor space parallel double-clutch power shift assembly according to claim 1, characterized in that: the transmission is characterized by further comprising a transmission shell (46), wherein the input shaft system, the output shaft system, the forward gear shaft system and the reverse gear shaft system are all arranged on the transmission shell (46).