Transmission system and agricultural machine

Abstract

The utility model provides a kind of transmission system and agricultural machinery, one power shaft is provided with forward clutch and reverse clutch, another power shaft is provided with low gear clutch and high gear clutch, forward clutch and reverse clutch are contained in first outer hub, low gear clutch and high gear clutch are contained in second outer hub;Different speed ratio shift gear set is respectively transmission connected in the both ends of intermediate shaft, and the power of power input shaft is transmitted to power output shaft by different speed ratio shift gear set, and the axis of intermediate shaft and the axis of two power shafts are not coplanar;At least one of power output shaft and main variable speed output shaft is provided with main shifter.The utility model makes full use of the circumferential space and axial space of power reversing and high-low gear module, reduces the space occupation of power reversing and high-low gear module, and can be further applied to more use scenarios while simple structure.

Description

Technical Field

[0001] This utility model belongs to the field of agricultural machinery technology, and in particular relates to a transmission system and agricultural machinery. Background Technology

[0002] With the development of agricultural technology, agricultural machinery such as tractors is being used more and more widely. Agricultural machinery generally uses a transmission system for power transmission. Existing transmission systems typically employ a sequential axial arrangement for power reversal and high / low gears, which places high demands on the axial dimensions of the transmission system, resulting in a non-compact structure and low space utilization.

[0003] To save axial space, existing technologies generally sacrifice high and low gear functions in exchange for a shorter axial dimension, which to some extent fails to meet the needs of more user scenarios. This results in existing transmission systems being unable to ensure they meet the requirements of a wider range of applications while simultaneously improving space utilization. Utility Model Content

[0004] The main purpose of this utility model is to propose a transmission system and agricultural machinery, which aims to solve the technical problems that existing transmission systems cannot meet various application scenarios and occupy a large space.

[0005] To achieve the above objectives, this utility model provides a transmission system, comprising: a power reversing and high / low gear module, including an intermediate shaft and two power shafts, one of which is a power input shaft and the other is a power output shaft; one power shaft is equipped with a forward clutch and a reverse clutch, and the other power shaft is equipped with a low-gear clutch and a high-gear clutch; the forward clutch and the reverse clutch are both housed in a first outer hub, and the low-gear clutch and the high-gear clutch are both housed in a second outer hub; the two ends of the intermediate shaft are respectively connected to shift gears with different speed ratios. The gear set includes an intermediate shaft that transmits power from the power input shaft to the power output shaft via a gear set with different speed ratios, wherein the axis of the intermediate shaft and the axes of the two power shafts are not coplanar; the main transmission module includes a main shifter, a main transmission output shaft, and multiple main transmission gear sets with different speed ratios, wherein at least one of the power output shaft and the main transmission output shaft is provided with a main shifter, which is used to engage the main transmission gear sets, and the power output shaft transmits power to the main transmission output shaft via the main transmission gear sets, and the main transmission output shaft is used to transmit power to the walking system of the agricultural machinery.

[0006] In this embodiment of the invention, the main transmission module is a six-speed transmission module, and the transmission system further includes a two-speed crawling module that can reduce speed and increase torque and an auxiliary transmission module that can change to two speeds. The main transmission module transmits power to the walking system of the agricultural machinery through the two-speed crawling module and the auxiliary transmission module.

[0007] In this embodiment of the utility model, there are three main shifters, namely a first shifter, a second shifter, and a third shifter. The first shifter and the third shifter are sequentially arranged on the main transmission output shaft along the axial direction of the transmission system. The second shifter is located between the first shifter and the third shifter along the axial direction of the transmission system and is arranged on the power output shaft. The first shifter, the second shifter, and the third shifter are all provided with main transmission gear sets with different speed ratios at both ends of their axial directions.

[0008] In this embodiment of the utility model, the second-speed crawling module includes a crawling transition shaft, a transmission gear set, a crawling gear set, and a crawling output shaft with a crawling shifter. The transmission gear set and the crawling gear set are axially disposed at both ends of the crawling shifter. The crawling shifter is used to engage the transmission gear set or the crawling gear set. The crawling transition shaft is connected to the main transmission module through the transmission gear set.

[0009] In this embodiment of the utility model, the auxiliary transmission module includes two auxiliary transmission gear sets with different speed ratios and an auxiliary transmission output shaft with an auxiliary shifter. The auxiliary transmission output shaft is used to engage the auxiliary transmission gear sets, and the two auxiliary transmission gear sets are axially arranged on the crawling output shaft.

[0010] In this embodiment of the utility model, the power reversing and high / low gear module includes an idler shaft, and the shift gear set includes a first gear, a second gear, a third gear, a fourth gear, a fifth gear, a sixth gear, and a seventh gear. The forward clutch is used to engage the first gear, and the reverse clutch is used to engage the fifth gear. The second gear and the sixth gear are respectively located at both ends of the intermediate shaft. The first gear and the third gear are both connected to the second gear in a transmission manner, and the fourth gear and the seventh gear are both connected to the sixth gear in a transmission manner. The fourth gear is located on the idler shaft and meshes with the fifth gear. The axis of the intermediate shaft, the axis of the idler shaft, and the axes of the two power shafts are not coplanar.

[0011] In this embodiment of the invention, the power input shaft and the power output shaft are arranged sequentially in the transverse direction, and the intermediate shaft is located in the transverse direction between the power input shaft and the power output shaft.

[0012] In this embodiment of the utility model, the transmission system includes a four-wheel drive mechanism, which includes a front-wheel drive module and a rear-wheel drive module. The main transmission module is used to transmit power to the four-wheel drive mechanism. The front-wheel drive module includes a four-wheel drive clutch, which is used to engage or disengage the front axle of the walking system. The rear-wheel drive module is used to drive the rear axle of the walking system.

[0013] In this embodiment of the present invention, the transmission system further includes a PTO module, which includes a PTO input shaft with a PTO clutch, a PTO gear set, and a PTO output shaft. The PTO clutch is used to engage or disengage the power input shaft. The PTO input shaft transmits power to the PTO output shaft through the PTO gear set. The PTO output shaft is used to drive the working implements of the agricultural machinery.

[0014] This utility model also proposes an agricultural machine, which includes the transmission system described above.

[0015] Through the above technical solution, the transmission system provided by the present utility model embodiment has the following beneficial effects: The power reversing and high / low gear module integrates reversing and high / low gear functions simultaneously through an intermediate shaft and two power shafts. Its simple structure allows it to meet a wider range of application scenarios. Furthermore, by placing the four clutches in pairs on the two power shafts, eliminating the need for any clutches on the intermediate shaft, the circumferential distance between the two power shafts and the intermediate shaft is reduced, improving the circumferential space utilization of the power reversing and high / low gear module. The forward and reverse clutches share a first outer hub, while the low / high gear clutches share a second outer hub. The power input shaft connects to the first outer hub, and the power output shaft connects to the second outer hub. This shared outer hub design saves axial dimensions in the transmission system. The axes of the two power shafts and the intermediate shaft are not coplanar, avoiding a three-axis planar configuration. This spatial layout fully utilizes the circumferential space (including lateral and vertical space) and axial space of the power reversing and high / low gear module. Power transmitted through the power reversing and high / low gear module is transmitted to the agricultural machinery's walking system via the main transmission module's output shaft. The multi-gear main transmission module allows the transmission system to meet a wider range of application scenarios. Furthermore, the main transmission module and the power reversing and high / low gear module share the same power output shaft, saving shaft components in the transmission system, reducing axial space occupation, simplifying the transmission path, and resulting in a simple structure and reduced transmission system weight. The power reversing and high / low gear module in this invention integrates power reversing and high / low gear functions through the cooperation of one intermediate shaft and two power shafts, meeting various application scenarios. Its staggered spatial layout fully utilizes the circumferential and axial space of the power reversing and high / low gear module, reducing its space occupation. Combined with the main transmission module featuring the main transmission gear set and main shifter, the simple structure further enhances its applicability to a wider range of applications.

[0016] Other features and advantages of this invention will be described in detail in the following detailed description section. Attached Figure Description

[0017] The accompanying drawings are provided to illustrate the present invention and form part of the specification. They are used together with the following detailed description to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the transmission system according to one embodiment of the present invention; Figure 2 This is a schematic diagram of the transmission system according to another embodiment of the present invention; Figure 3 This is a schematic diagram of a portion of the shaft structure of the transmission system according to an embodiment of the present invention; Figure 4 This is a schematic diagram of a portion of the shaft structure of the transmission system according to another embodiment of the present invention; Figure 5 This is a schematic diagram of a portion of the shaft structure of the transmission system according to another embodiment of the present invention; Figure 6 This is a partial structural schematic diagram of the transmission system according to one embodiment of the present invention; Figure 7 This is a schematic diagram of the PTO module structure of the transmission system according to an embodiment of the present invention; Figure 8 This is a schematic diagram of the power reversing structure of the transmission system according to an embodiment of the present invention.

[0018] Explanation of reference numerals in the attached figures Detailed Implementation

[0019] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of this utility model.

[0020] The transmission system according to this utility model is described below with reference to the accompanying drawings.

[0021] like Figures 1 to 8 As shown, in an embodiment of this utility model, the transmission system 100 includes a power reversing and high / low gear module and a main transmission module. The power reversing and high / low gear module includes an intermediate shaft S2 and two power shafts, one of which is a power input shaft S1 and the other is a power output shaft S3. A forward clutch C1 and a reverse clutch C2 are provided on one power shaft, and a low-gear clutch C3 and a high-gear clutch C4 are provided on the other power shaft. The forward clutch C1 and the reverse clutch C2 are both housed in a first outer hub, and the low-gear clutch C3 and the high-gear clutch C4 are both housed in a second outer hub. The two ends of the intermediate shaft S2 are respectively connected to the transmission system. The system includes shift gear sets with different speed ratios. The intermediate shaft S2 transmits power from the power input shaft S1 to the power output shaft S3 through the shift gear sets with different speed ratios. The axis of the intermediate shaft S2 is not coplanar with the axes of the two power shafts. The main transmission module includes a main shifter, a main transmission output shaft S5, and multiple main transmission gear sets with different speed ratios. At least one of the power output shaft S3 and the main transmission output shaft S5 is equipped with a main shifter. The main shifter is used to engage the main transmission gear sets. The power output shaft S3 transmits power to the main transmission output shaft S5 through the main transmission gear sets. The main transmission output shaft S5 is used to transmit power to the walking system of the agricultural machinery.

[0022] like Figure 1As shown, in one embodiment, the forward clutch C1 and reverse clutch C2 in the power reversing and high / low gear module are mounted on the power input shaft S1, while the low-gear clutch C3 and high-gear clutch C4 are mounted on the power output shaft S3. Through shift gear sets with different speed ratios, the power reversing and high / low gear module integrates both reversing and high / low gear functions, meeting the needs of different application scenarios. Figure 8 As shown, in another embodiment, the forward clutch C1 and the reverse clutch C2 are mounted on the power output shaft S3, and the low-gear clutch C3 and the high-gear clutch C4 are mounted on the power input shaft S1. Figure 6 As shown, both the forward clutch C1 and the reverse clutch C2 are housed in the first outer hub, with each pair of clutches housed in the same outer hub, which improves the axial structural compactness of the power reversing and high / low gear modules. Both the low gear clutch C3 and the high gear clutch C4 are housed in the second outer hub, with each pair of clutches housed in the same outer hub, which further improves the axial space utilization of the power reversing and high / low gear modules.

[0023] In this embodiment, the circumferential space of the power reversing and high / low gear module may include the lateral space and longitudinal space of the power reversing and high / low gear module, such as... Figure 5 As shown, the horizontal direction is left-right, and the vertical direction is up-down. Both the horizontal and vertical directions are perpendicular to the axial direction of the power reversing and high / low gear module. The transmission system 100 is mainly used in agricultural machinery such as tractors to drive the walking system of the agricultural machinery. Furthermore, by placing at least one of the two power shafts on the top of the housing of the transmission system 100, the oil churning loss of the clutches on the two power shafts can be reduced, thereby reducing the heat power of the power reversing and high / low gear module and improving the overall working efficiency of the power reversing and high / low gear module.

[0024] It should be noted that, in one embodiment, the forward clutch C1, reverse clutch C2, low-gear clutch C3, and high-gear clutch C4 are all electronically controlled automatic clutches. Under the control of the electro-hydraulic system, the four clutches can slowly disengage and slowly engage. Specifically, during high-low gear shifting, the low-gear clutch C3 slowly disengages, causing the high-gear clutch C4 to slowly engage, achieving continuous and uninterrupted power input during gear shifting. The number of main shifters can be set according to actual usage requirements. The main shifters can be synchronizers or meshing sleeves. Using synchronizers allows for smooth gear shifting during agricultural machinery operation. Using meshing sleeves offers better economic efficiency.

[0025] In this embodiment, the power reversing and high / low gear module integrates reversing and high / low gear functions simultaneously through the intermediate shaft S2 and two power shafts. Its simple structure allows it to meet a wider range of application scenarios. Furthermore, by placing the four clutches in pairs on the two power shafts, eliminating the need for any clutches on the intermediate shaft S2, the circumferential distance between the two power shafts and the intermediate shaft S2 is reduced, improving the circumferential space utilization of the power reversing and high / low gear module. The forward clutch C1 and reverse clutch C2 share a first outer hub, while the low-gear clutch C3 and high-gear clutch C4 share a second outer hub. The power input shaft S1 is connected to the first outer hub, and the power output shaft S3 is connected to the second outer hub. This shared outer hub design saves 100 axial gears in the transmission system. The axes of the two power shafts and the intermediate shaft S2 are not coplanar, avoiding a three-axis planar configuration. This spatial layout fully utilizes the circumferential space (including lateral and vertical space) and axial space of the power reversing and high / low gear module. Power transmitted through the power reversing and high / low gear module is transmitted to the agricultural machinery's walking system via the main transmission output shaft S5 of the main transmission module. The multi-gear main transmission module allows the transmission system 100 to meet a wider range of application scenarios. Furthermore, the main transmission module and the power reversing and high / low gear module share the power output shaft S3, saving shaft components in the transmission system 100, reducing axial space occupation, simplifying the transmission path, and resulting in a simpler structure and reduced weight. In this embodiment, the power reversing and high / low gear module works with one intermediate shaft S2 and two power shafts, integrating power reversing and high / low gear functions. This satisfies various application scenarios and, through a spatially staggered layout, fully utilizes the circumferential and axial space of the power reversing and high / low gear module, reducing its space occupation. Combined with the main transmission module featuring the main transmission gear set and main shifter, the simple structure further enhances its applicability to a wider range of applications.

[0026] In one embodiment, the main transmission module is a six-speed transmission module. The transmission system 100 also includes a two-speed crawler module capable of reducing speed and increasing torque, and an auxiliary transmission module capable of two-speed shifting. The main transmission module transmits power to the walking system of the agricultural machinery through the two-speed crawler module and the auxiliary transmission module. In this embodiment, the power reversing and high / low gear module integrates power reversing and power high / low gears. Together with the six-speed main transmission module, the two-speed crawler module capable of reducing speed and increasing torque, and the two-speed auxiliary transmission module, it can achieve 48 forward gears + 48 reverse gears, for a total of 96 gears. This results in a wider speed range distribution, more flexible operation and driving, and a better experience.

[0027] It should be noted that there are three main shifters, namely the first shifter T1, the second shifter T2, and the third shifter T3. The first shifter T1 and the third shifter T3 are sequentially arranged on the main transmission output shaft S5 along the axial direction of the transmission system 100. The second shifter T2 is located between the first shifter T1 and the third shifter T3 along the axial direction of the transmission system 100, and the second shifter T2 is arranged on the power output shaft S3. The first shifter T1, the second shifter T2, and the third shifter T3 are all provided with main transmission gear sets with different speed ratios at both ends of their axial directions.

[0028] In this embodiment, the first shifter T1, the second shifter T2, and the third shifter T3 are arranged sequentially and at intervals along the axial direction, which makes full use of the axial space and avoids the situation where side-by-side arrangement would result in excessive shaft spacing and a large circumferential space occupation of the transmission system 100. The first shifter T1 and the third shifter T3 are located on the main transmission output shaft S5, and the second shifter T2 is located on the power output shaft S3. Distributing the three main shifters on two shafts further utilizes the circumferential space. The main transmission gear set may include gears 8, 9, 10, 11, 12, 13, 14, 15, 15, 16, 17, 18, and 19. The three main shifters may be synchronizers or meshing gear sleeves. In one embodiment, all three main shifters are synchronizers, which can achieve smooth shifting during vehicle operation. During gear shifting, the first shifter T1 controls the 1st / 2nd gear transition, the second shifter T2 controls the 3rd / 4th gear transition, and the third shifter T3 controls the 5th / 6th gear transition. Ultimately, power is transmitted from the power output shaft S3 to the main transmission output shaft S5 via gears 1-6. Gears 8-19 are the gear positions: 8 / 9 for 1st gear, 10 / 11 for 2nd gear, 12 / 13 for 3rd gear, 14 / 15 for 4th gear, 16 / 17 for 5th gear, and 18 / 19 for 6th gear. Each time the three main shifters change gears, they control one pair of gears to mesh and transmit power.

[0029] Specifically, the second-gear crawling module includes a crawling transition shaft S6, a transmission gear set, a crawling gear set, and a crawling output shaft S7 with a crawling shifter T4. The transmission gear set and the crawling gear set are axially located at both ends of the crawling shifter T4. The crawling shifter T4 is used to engage the transmission gear set or the crawling gear set. The crawling transition shaft S6 is connected to the main transmission module through the transmission gear set.

[0030] In this embodiment, the transmission gear set may include meshing 20 gears 20 and 21 gears 21, the crawling gear set may include meshing 22 gears 22 and 23 gears 23, the crawling transition shaft S6 is connected to the main transmission module through the transmission gear set, the crawling shifter T4 is used to engage 20 gears 20 or 22 gears 22, and the shifter may be a synchronizer or a meshing gear sleeve.

[0031] The transmission gear set and the crawling gear set are located on both sides of the axial direction of the crawling shifter T4. Gear 20 (20) and gear 22 (22) are sequentially arranged along the axial direction of the crawling output shaft S7, and gear 21 (21) and gear 23 (23) are sequentially arranged along the axial direction of the crawling transition shaft S6. Under normal conditions where high torque output is not required, the crawling shifter T4 is coupled with gear 20, and power is directly transmitted from the main transmission output shaft S5 to the crawling output shaft S7 without deceleration. When the crawling shifter T4 is coupled with gear 22 (22), the power transmission becomes main transmission output shaft S5 – crawling transition shaft S6 – crawling output shaft S7, with gears 20-23 participating in deceleration and torque amplification. In this embodiment, the second-gear crawling module can obtain greater torque when high torque output is required, enabling the transmission system 100 to adapt to more application scenarios. Furthermore, the switching between conditions requiring high torque output and those not requiring high torque output can be achieved through just two gear sets, resulting in a simple structure.

[0032] like Figure 1 and Figure 2 As shown, the auxiliary transmission module includes two auxiliary transmission gear sets with different speed ratios and an auxiliary transmission output shaft S8 with an auxiliary shifter T5. The auxiliary transmission output shaft S8 is used to engage the auxiliary transmission gear sets, and the two auxiliary transmission gear sets are axially arranged on the crawling output shaft S7. In this embodiment, the auxiliary transmission module and the second-gear crawling module share the crawling output shaft S7, which can further save shaft components of the transmission system 100. In this embodiment, the auxiliary shifter T5 can be a synchronizer or a meshing gear sleeve. The auxiliary transmission gear sets may include meshing 24 gears 24 and 25 gears 25, meshing 26 gears 26 and 27 gears 27. The 24 gears 24 and 26 gears 26 are arranged axially along the crawling output shaft S7, and the 25 gears 25 and 27 gears 27 are arranged sequentially along the axial direction of the auxiliary transmission output shaft S8. The auxiliary shifter T5 is used to engage either the 25 gear 25 or the 27 gear 27. In this embodiment, the secondary transmission module uses only one shaft, two secondary transmission gear sets, and one secondary shifter T5 to achieve two-speed transmission. The structure is simple and easy to use. 24 / 25 are low gears, and 26 / 27 are high gears. Each time the secondary shifter T5 changes gears, it controls one pair of gears to mesh and transmit power.

[0033] Specifically, the power reversing and high / low gear module includes an idler shaft S4, and a shift gear set including gear 1, gear 2, gear 3, gear 4, gear 5, gear 6, and gear 7. A forward clutch C1 engages gear 1, and a reverse clutch C2 engages gear 5. Gear 2 and gear 6 are located at opposite ends of the intermediate shaft S2. Gear 1 and gear 3 are both connected to gear 2, and gear 4 and gear 7 are both connected to gear 6. Gear 4 is located on the idler shaft S4 and meshes with gear 5. The axes of the intermediate shaft S2, the idler shaft S4, and the axes of the two power shafts are not coplanar.

[0034] like Figure 1 and Figure 8 As shown, the power reversing and high / low gear module in this embodiment includes seven gears, of which the fourth gear 4 is a reversing idler wheel. Reversing is achieved through the reversing idler wheel on the idler wheel shaft S4. The structure is simple and easy to manufacture.

[0035] In this embodiment, the power transmission route of the power reversing and high / low gear module in high gear is as follows: the forward clutch C1 engages with gear 1, the high gear clutch C4 engages with gear 7, the power of the power input shaft S1 is transmitted to the intermediate shaft S2 via gear 1-gear 2 meshing, and the power of the intermediate shaft S2 is transmitted to the power output shaft S3 via gear 6-gear 7 meshing. The power transmission route of the power reversing and high / low gear module in low gear forward is as follows: forward clutch C1 engages with gear 1, low gear clutch C3 engages with gear 3, the power of power input shaft S1 is transmitted to intermediate shaft S2 through gear 1-gear 2 meshing, and the power of intermediate shaft S2 is transmitted to power output shaft S3 through gear 2-gear 3 meshing. The power transmission route of the power reversing and high / low gear module in high gear reverse is as follows: reverse clutch C2 engages with gear 5, high gear clutch C4 engages with gear 7, the power of the power input shaft S1 is transmitted to the idler shaft S4 through the meshing of gear 5-gear 4, then to the intermediate shaft S2 through gear 4-gear 6, and finally to the power output shaft S3 through the meshing of gear 6-gear 7. The power transmission route of the power reversing and high / low gear module in low gear reverse is as follows: the reverse clutch C2 engages with the fifth gear 5, the low gear clutch C3 engages with the third gear 3, the power of the power input shaft S1 is transmitted to the idler shaft S4 through the meshing of the fifth gear 5 and the fourth gear 4, and then through the fourth gear 4 and the sixth gear 6 to the intermediate shaft S2, the power of the intermediate shaft S2 is transmitted to the power output shaft S3 through the meshing of the second gear 2 and the third gear 3.

[0036] In this embodiment, the power reversing and high / low gear module can achieve the integration of four gears through the cooperation of seven gears, four clutches and three shafts. The structure is simple and easy to shift gears. Moreover, the axis of the intermediate shaft S2, the axis of the idler wheel shaft S4 and the axes of the two power shafts are not coplanar. The four shafts adopt a spatial layout, which can make full use of the axial and circumferential space in the power reversing and high / low gear module compared with the planar layout.

[0037] like Figure 3 As shown, in one embodiment, the power input shaft S1 and the power output shaft S3 are arranged sequentially in the horizontal direction, and the intermediate shaft S2 is located in the horizontal direction between the power input shaft S1 and the power output shaft S3. It should be noted that the intermediate shaft S2 may be located vertically below the two power shafts. In other embodiments, the intermediate shaft S2 may be located vertically above or in the middle of the two power shafts.

[0038] In this embodiment, the power input shaft S1 and the power output shaft S3 can be arranged side by side at intervals above the intermediate shaft S2. By staggering the intermediate shaft S2 between the power input shaft S1 and the power output shaft S3, the lateral and longitudinal space of the power reversing and high / low gear module can be fully utilized.

[0039] Specifically, such as Figure 4 As shown, the idler shaft S4 is vertically positioned below the two power shafts. The axes of the power input shaft S1 and the power output shaft S3 are located in the first plane, while the axes of the idler shaft S4 and the intermediate shaft S2 are located in the second plane. The first plane is parallel to the second plane. Furthermore, the axes of the power input shaft S1 and the power output shaft S3 are arranged side-by-side laterally in the first plane, and the idler shaft S4 and the intermediate shaft S2 are arranged side-by-side laterally in the second plane. The first and second planes are arranged vertically in sequence, allowing the four shafts to fully utilize the lateral and longitudinal space of the power reversing and high / low gear modules, while avoiding excessive axial space occupation.

[0040] like Figure 5 As shown, it should be noted that in another embodiment, the axes of the idler shaft S4, the power input shaft S1, the intermediate shaft S2, and the power output shaft S3 are arranged vertically in sequence, and the axis of the intermediate shaft S2 is located horizontally between the axes of the power input shaft S1 and the idler shaft S4. In this embodiment, the four shafts are arranged vertically in sequence, forming a staggered arrangement, and the four shafts are also staggered horizontally, which maximizes the utilization of the lateral and longitudinal space of the power reversing and high / low gear modules.

[0041] It should be noted that the transmission system 100 includes a four-wheel drive mechanism, which includes a front-wheel drive module and a rear-wheel drive module. The main transmission module is used to transmit power to the four-wheel drive mechanism. The front-wheel drive module includes a four-wheel drive clutch C6, which is used to engage or disengage the front axle of the travel system. The rear-wheel drive module is used to drive the rear axle of the travel system.

[0042] In this embodiment, the front-drive module may include meshing 28-speed gears 28 and 29-speed gears 29. The auxiliary transmission output shaft S8 can output power to the front-drive shaft S11 through the 28-speed gears 28 and 29-speed gears 29. The four-wheel drive clutch C6 is located on the front-drive shaft S11. The four-wheel drive clutch C6 can control whether power is input to the front axle. When the four-wheel drive clutch C6 is engaged, the front axle will receive power; otherwise, there will be no power. In this embodiment, the cooperation between the front-drive module and the rear-drive module can realize the switching between four-wheel drive and rear-drive, further meeting the needs of different usage scenarios. The rear-drive module may include a rear-drive shaft S12 and a differential lock clutch C5. The power input of the rear-drive module is the auxiliary transmission output shaft S8, and the power is finally output by the rear-drive shaft S12. The auxiliary transmission output shaft S8 and the rear-drive shaft S12 contain a bevel gear differential mechanism and a planetary reduction mechanism. The differential lock clutch C5 can control the differential lock state.

[0043] The transmission system 100 also includes a PTO module, which includes a PTO input shaft S9 with a PTO clutch C7, a PTO gear set, and a PTO output shaft S10. The PTO clutch C7 is used to engage or disengage the power input shaft S1. The PTO input shaft S9 transmits power to the PTO output shaft S10 through the PTO gear set. The PTO output shaft S10 is used to drive the implements of agricultural machinery.

[0044] like Figure 7 As shown, in one embodiment, the PTO module can be a two-stage module, such as... Figure 2As shown, in another embodiment, the PTO module can be a three-speed module. A PTO clutch C7 and a second PTO shifter T7 are mounted on the PTO input shaft S9, and a first PTO shifter T6 is mounted on the PTO output shaft S10. The first PTO shifter T6 and the second PTO shifter T7 can employ synchronizers and meshing gear sleeves. The PTO module may include meshing gears 30 and 31, 32 and 33, and 34 and 35. The second PTO shifter T7 engages gear 34, and the first PTO shifter T6 engages either gear 31 or gear 33. The first PTO shifter T6 is axially located between the PTO clutch C7 and the second PTO shifter T7, fully utilizing the axial and circumferential space of the transmission system 100. Gears 30, 32, and 34 are arranged sequentially along the axial direction of the PTO input shaft S9, while gears 31, 33, and 35 are arranged sequentially along the axial direction of the PTO output shaft S10. Gears 30 and 31 are first-gears, gears 32 and 33 are second-gears, and gears 34 and 35 are third-gears. The PTO module transmits power to the work implement via the PTO. The PTO clutch C7 controls the opening and closing of the PTO; when the PTO clutch C7 is engaged, the PTO is in the working state, and vice versa. In this embodiment, the PTO module enables the transmission system 100 to drive the work implement, thus broadening the application scenarios of the transmission system 100.

[0045] This utility model also proposes an agricultural machine, which includes a walking system and a transmission system 100 as described above. The specific structure of the transmission system 100 is as described in the above embodiments. Since the agricultural machine adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here. In one embodiment, the agricultural machine can be applied to a tractor.

[0046] In the description of this utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0047] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0048] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0049] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A transmission system for agricultural machinery, characterized in that, The transmission system (100) includes: A power reversing and high / low gear module includes an intermediate shaft (S2) and two power shafts, one of which is a power input shaft (S1) and the other is a power output shaft (S3). One power shaft is equipped with a forward clutch (C1) and a reverse clutch (C2), while the other power shaft is equipped with a low-gear clutch (C3) and a high-gear clutch (C4). The forward clutch (C1) and the reverse clutch (C2) are both housed in a first outer hub, and the low-gear clutch (C3) and the high-gear clutch (C4) are both housed in a second outer hub. The two ends of the intermediate shaft (S2) are respectively connected to shift gear sets with different speed ratios. The intermediate shaft (S2) transmits power from the power input shaft (S1) to the power output shaft (S3) through these shift gear sets. Furthermore, the axis of the intermediate shaft (S2) is not coplanar with the axes of the two power shafts. The main transmission module includes a main shifter, a main transmission output shaft (S5), and multiple main transmission gear sets with different speed ratios. The main shifter is provided on at least one of the power output shaft (S3) and the main transmission output shaft (S5). The main shifter is used to engage the main transmission gear sets. The power output shaft (S3) transmits power to the main transmission output shaft (S5) through the main transmission gear sets. The main transmission output shaft (S5) is used to transmit power to the walking system of the agricultural machinery.

2. The transmission system according to claim 1, characterized in that, The main transmission module is a six-speed transmission module. The transmission system (100) also includes a two-speed crawling module that can reduce speed and increase torque and an auxiliary transmission module that can change to two speeds. The main transmission module transmits power to the walking system of the agricultural machinery through the two-speed crawling module and the auxiliary transmission module.

3. The transmission system according to claim 2, characterized in that, The number of main shifters is three, namely the first shifter (T1), the second shifter (T2) and the third shifter (T3). The first shifter (T1) and the third shifter (T3) are sequentially arranged on the main transmission output shaft (S5) along the axial direction of the transmission system (100). The second shifter (T2) is located between the first shifter (T1) and the third shifter (T3) along the axial direction of the transmission system (100) and is arranged on the power output shaft (S3). The first shifter (T1), the second shifter (T2) and the third shifter (T3) are provided with main transmission gear sets with different speed ratios at both ends of the axial direction.

4. The transmission system according to claim 2, characterized in that, The second-gear crawling module includes a crawling transition shaft (S6), a transmission gear set, a crawling gear set, and a crawling output shaft (S7) with a crawling shifter (T4). The transmission gear set and the crawling gear set are axially disposed at both ends of the crawling shifter (T4). The crawling shifter (T4) is used to engage the transmission gear set or the crawling gear set. The crawling transition shaft (S6) is connected to the main transmission module through the transmission gear set.

5. The transmission system according to claim 4, characterized in that, The auxiliary transmission module includes two auxiliary transmission gear sets with different speed ratios and an auxiliary transmission output shaft (S8) with an auxiliary shifter (T5). The auxiliary transmission output shaft (S8) is used to engage the auxiliary transmission gear sets, and the two auxiliary transmission gear sets are axially arranged on the crawling output shaft (S7).

6. The transmission system according to any one of claims 1 to 5, characterized in that, The power reversing and high / low gear module includes an idler shaft (S4), and the shift gear set includes a first gear (1), a second gear (2), a third gear (3), a fourth gear (4), a fifth gear (5), a sixth gear (6), and a seventh gear (7). The forward clutch (C1) is used to engage the first gear (1), and the reverse clutch (C2) is used to engage the fifth gear (5). The second gear (2) and the sixth gear (6) are respectively located at both ends of the intermediate shaft (S2). The first gear (1) and the third gear (3) are both connected to the second gear (2). The fourth gear (4) and the seventh gear (7) are both connected to the sixth gear (6). The fourth gear (4) is located on the idler shaft (S4) and meshes with the fifth gear (5). The axis of the intermediate shaft (S2), the axis of the idler shaft (S4), and the axes of the two power shafts are not coplanar.

7. The transmission system according to any one of claims 1 to 5, characterized in that, The power input shaft (S1) and the power output shaft (S3) are arranged sequentially in the transverse direction, and the intermediate shaft (S2) is located in the transverse direction between the power input shaft (S1) and the power output shaft (S3).

8. The transmission system according to any one of claims 1 to 5, characterized in that, The transmission system (100) includes a four-wheel drive mechanism, which includes a front-wheel drive module and a rear-wheel drive module. The main transmission module is used to transmit power to the four-wheel drive mechanism. The front-wheel drive module includes a four-wheel drive clutch (C6), which is used to engage or disengage the front axle of the drive system. The rear-wheel drive module is used to drive the rear axle of the drive system.

9. The transmission system according to any one of claims 1 to 5, characterized in that, The transmission system (100) also includes a PTO module, which includes a PTO input shaft (S9) with a PTO clutch (C7), a PTO gear set and a PTO output shaft (S10). The PTO clutch (C7) is used to engage or disengage the power input shaft (S1). The PTO input shaft (S9) transmits power to the PTO output shaft (S10) through the PTO gear set. The PTO output shaft (S10) is used to drive the working implements of the agricultural machinery.

10. An agricultural machine, characterized in that, The agricultural machinery includes the transmission system (100) as described in any one of claims 1 to 9.

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