A multi-functional modular tractor driveline

Abstract

The present application relates to the field of tractor technology, and particularly relates to a multifunctional modular tractor transmission system, comprising an engine and a gearbox, the gearbox comprising a main transmission module, a secondary transmission module, a rear axle module, a PTO power output module and a connecting module, the connecting module being a shuttle reversing module or a Hi-Lo gear module, the connecting module being detachably installed between the engine and the main transmission module. The present application divides the transmission system into the main transmission module, the secondary transmission module, the rear axle module, the PTO power output module and the connecting module, and when assembling the gearbox, the modules can be combined according to requirements to meet the requirements of complex terrain and diversified operation.

Description

Technical Field

[0001] This invention relates to the field of tractor technology, and more specifically to a multifunctional modular tractor transmission system. Background Technology

[0002] Tractors, as a basic power source, have advantages such as wide adaptability and high efficiency, and occupy an important position in my country's agricultural production. The gearbox transmission system, as a core component of the tractor, directly affects the tractor's power transmission efficiency, ease of operation, and overall operational performance.

[0003] Currently, many problems have been exposed in the practical application of tractor gearboxes in my country, especially in small and medium horsepower tractor gearboxes. These problems include a lack of modular design, limited functionality, rigid structure making upgrades and modifications difficult, and insufficient intelligence, which seriously restricts the further improvement of tractor performance and the increase in agricultural production efficiency. Summary of the Invention

[0004] To address the above problems, this invention proposes a multifunctional modular design for a tractor transmission system, the specific technical solution of which is as follows: A multi-functional modular tractor transmission system includes an engine and a gearbox. The gearbox includes a main transmission module, a secondary transmission module, a rear axle module, a PTO power output module, and a connecting module. The connecting module is a shuttle reversing module or a Hi-Lo gear module, and is detachably installed between the engine and the main transmission module. The main transmission module contains gears four, five, six, seven, fifteen, sixteen, seventeen, eighteen, shaft two, shaft eight, shaft five, I-II synchronizer, and III-IV synchronizer. Gears four and fifteen mesh with each other. The gears are connected as follows: gears five and sixteen mesh with each other; gears six and seventeen mesh with each other; gears seven and eighteen mesh with each other; gears four and five are mounted on shaft two via splines; gears six and seven are mounted on shaft two via needle rollers and connected to both ends of synchronizer III-IV; gears fifteen and sixteen are mounted on shaft five and connected to both ends of synchronizer I-II; gears seventeen and eighteen are mounted on shaft five via splines; shaft two is connected to the output end of the connecting module via splines; gears eight, nine, and... are installed in the auxiliary transmission module. Gears 10, 11, 12, 7, PH section meshing sleeve, LM section meshing sleeve; Gears 8 and 9 are mounted on 7 and connected to both ends of the PH section meshing sleeve; Gears 10 and 11 are mounted on 7 and connected to both ends of the LM section meshing sleeve; Gear 8 is connected to 5 via a spline; The rear axle module contains gears 24 and 25, 7, 9, the differential assembly, and the final drive assembly. Gear 24 is mounted on 7; Gear 25 is bolted to the differential assembly; Gears 24 and 25... Five gears are intermeshing; one end of the final drive assembly is connected to the differential assembly, and the other end is connected to the tire; one end of shaft nine is connected to shaft eight via a spline sleeve, and the other end is connected to the PTO power output module; the PTO power output module contains gears twenty-six, twenty-seven, twenty-eight, and twenty-nine, the PTO input shaft, and the PTO output shaft. Gears twenty-six and twenty-seven are splined on the PTO input shaft; gears twenty-eight and twenty-nine are splined on the PTO output shaft and connected to both ends of the PTO shift engagement sleeve.

[0005] As a preferred embodiment of the present invention, the transmission system further includes a creeper gear module, which is detachably installed in the auxiliary transmission module. The creeper gear module contains gears nineteen, twenty, twenty-one, twenty-two, and twenty-three, and shaft six. Gears nineteen, twenty-two, and twenty-three are splined onto shaft six. Gears twenty and twenty-one are loosely mounted on shaft six. Gear nineteen meshes with gear eight in the auxiliary transmission module; gear twenty meshes with gear nine in the auxiliary transmission module; gear twenty-one meshes with gear ten in the auxiliary transmission module; gear twenty-two meshes with gear eleven in the auxiliary transmission module; and gear twenty-three meshes with gear twelve in the auxiliary transmission module.

[0006] As a preferred embodiment of the present invention, the transmission system further includes a PTO wet clutch module, which is detachably installed in the rear axle module and is located between shaft nine and the PTO power output module.

[0007] In a preferred embodiment of the present invention, when the connecting module is a shuttle-type reversing module, the shuttle-type reversing module is equipped with shaft one, gear one, gear two, gear three, gear thirteen, gear fourteen, shaft three, shaft four, shaft eight, and a reversing synchronizer. The output end of shaft one is connected to the engine, and the output end is connected to the reversing synchronizer one via a spline. Gear two and gear thirteen are meshed with each other, and gear one, gear three, and gear fourteen are meshed with each other, wherein gear fourteen is an intermediate idler gear. Gear one and gear thirteen are mounted on shaft three via a spline; gear fourteen is mounted on shaft four via a spline; gear two and gear three are mounted on shaft one via needle roller bearings, and gear two and gear three are respectively connected to the left and right ends of the reversing synchronizer one via splines.

[0008] In a preferred embodiment of the present invention, when the connecting module is a shuttle reversing module, the shuttle reversing module is equipped with shaft one, gear one, gear two, gear three, gear thirteen, gear fourteen, shaft three, shaft four, shaft eight, and a power reversing clutch; the input end of shaft one is connected to the engine, and the output end is connected to the power reversing clutch via a spline; gear two and gear thirteen are meshed together, and gear one, gear three, and gear fourteen are meshed together, wherein gear fourteen is an intermediate idler gear; gear one and gear thirteen are mounted on shaft three via a spline; gear fourteen is mounted on shaft four via a spline; gear two and gear three are mounted on shaft one via needle roller bearings, and gear two and gear three are respectively connected to the left and right ends of the power reversing clutch via splines.

[0009] As a preferred embodiment of the present invention, when the connecting module is a shuttle reversing module, shafts one, two, eight and nine are coaxial; shafts three, five and seven are coaxial, shaft three is parallel to the axis of shaft one and is located on the vertical plane of the tractor center; shafts four and six are parallel to the axis of shaft one, and when viewed from the rear axle of the tractor towards the engine, shafts four and six are located on the left and right sides of the vertical plane of the tractor center, respectively.

[0010] In a preferred embodiment of the present invention, when the connecting module is a Hi-Lo gear module, the Hi-Lo gear module is equipped with gears 30, 31, 32, 33, 34, 35, 36, shafts 10, 2, 3, and 4, a reversing synchronizer, and a Hi-Lo gear clutch. Gear 30 is mounted on shaft 10 via needle roller bearings. Gears 34, 31, and 36 are mounted on shaft 3 via splines. Gear 35 is mounted on shaft 4 via splines. Gear 33 is mounted on shaft 2 via needle roller bearings. Gear 33 is mounted on the output shaft of the Hi-Lo gear clutch via needle roller bearings. Gear 30 meshes with gear 34, and gear 33 meshes with gear 36. Gears 32, 35, and 31 mesh with each other. Gear 35 is an intermediate idler gear. The two ends of the reversing synchronizer are connected to gears 32 and 33, respectively. The two ends of the Hi-Lo gear clutch are connected to gear 30 and the output shaft of the Hi-Lo gear clutch, respectively.

[0011] As a preferred embodiment of the present invention, when the connecting module is a Hi-Lo gear module, shafts 2, 8, 9 and 10 are coaxial; shafts 3, 5 and 7 are coaxial, shaft 3 is parallel to the axis of shaft 1 and is located on the vertical plane of the tractor center; shafts 4 and 6 are parallel to the axis of shaft 1, and when viewed from the rear axle of the tractor towards the engine, shafts 4 and 6 are located on the left and right sides of the vertical plane of the tractor center, respectively.

[0012] The beneficial effects of this invention are as follows: The transmission system is divided into multiple functional modules, including the main transmission module, auxiliary transmission module, rear axle module, PTO power output module and connection module, creeper gear module, and PTO wet clutch module. During gearbox assembly, these modules can be combined as needed to meet the demands of complex terrain and diverse operational requirements. Furthermore, the transmission system adopts a two-shaft spatial planar layout, resulting in good manufacturability and convenient installation. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the synchronous reversing with crawling gear function described in the embodiment; Figure 2 This is a schematic diagram of the power reversing system with creeper function described in the embodiment. Figure 3 This is a schematic diagram of the synchronous commutation with Hi-Lo mode function in the embodiment. Detailed Implementation

[0015] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., 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. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0016] The present invention provides the following specific implementation schemes: like Figure 1As shown, taking the shuttle reversing module as an example, this invention provides a multi-functional modular tractor transmission system, including an engine and a gearbox. The gearbox has synchronous reversing and creeping gear functions. The gearbox includes a main transmission module, a secondary transmission module, a rear axle module, a PTO power output module, and a shuttle reversing module. The shuttle reversing module is detachably installed between the engine and the main transmission module. The main transmission module is equipped with gears 4, 5, 6, 7, 15, 16, 17, 18, shafts S2, S8, S5, I-II synchronizer C2, and III-IV synchronizer C3. Gears 4 and... Gears 15 and 16 are meshed together; gears 5 and 16 are meshed together; gears 6 and 17 are meshed together; gears 7 and 18 are meshed together; gears 4 and 5 are splined on shaft 2 (S2); gears 6 and 7 are needle-rolled on shaft 2 (S2) and connected to both ends of synchronizer C3 (III-IV); gears 15 and 16 are mounted on shaft 5 (S5) and connected to both ends of synchronizer C2 (I-II); gears 17 and 18 are splined on shaft 5 (S5); shaft 2 (S2) is splined to the output end of the connecting module; gear 8 is installed inside the auxiliary transmission module. Gears 9, 10, 11, 12, 7 (shaft S7), PH section meshing sleeve C4, LM section meshing sleeve C5; Gears 8 and 9 are mounted on shaft S7 and connected to both ends of PH section meshing sleeve C4; Gears 10 and 11 are mounted on shaft S7 and connected to both ends of LM section meshing sleeve C5; Gear 8 is connected to shaft S5 via a spline; the rear axle module contains gears 24 and 25, shaft S7, shaft S9, differential assembly, and final drive assembly. Gear 24 is mounted on shaft S7, and gear 25 is bolted to the differential assembly. In the assembly, gears 24 and 25 mesh with each other; one end of the final drive assembly is connected to the differential assembly, and the other end is connected to the tire; one end of shaft 9 S9 is connected to shaft 8 S8 via a spline sleeve, and the other end is connected to the PTO power output module; the PTO power output module contains gears 26, 27, 28, 29, the PTO input shaft, and the PTO output shaft. Gears 26 and 27 are splined on the PTO input shaft; gears 28 and 29 are splined on the PTO output shaft and connected to both ends of the PTO shift sleeve.

[0017] Furthermore, the auxiliary transmission module is optionally equipped with a creeper gear module. The creeper gear module contains gears 19 (19), 20 (20), 21 (21), 22 (22), 23 (23), and shaft 6 (S6). Gears 19 (19), 22 (22), and 23 (23) are splined onto shaft 6 (S6). Gears 20 (20) and 21 (21) are loosely fitted onto shaft 6 (S6). Gear 19 (19) meshes with gear 8 (8) within the auxiliary transmission module; gear 20 (20) meshes with gear 9 (9) within the auxiliary transmission module; gear 21 (21) meshes with gear 10 (10) within the auxiliary transmission module; gear 22 (22) meshes with gear 11 (11) within the auxiliary transmission module; and gear 23 (23) meshes with gear 12 (12) within the auxiliary transmission module.

[0018] Furthermore, the shuttle-type reversing module is equipped with shaft S1, gear 1, gear 2, gear 3, gear 13, gear 14, shaft S3, shaft S4, shaft S8, and reversing synchronizer C1. The output end of shaft S1 is connected to the engine, and the output end is connected to reversing synchronizer C1 via a spline. Gear 2 and gear 13 are meshed together. Gear 1, gear 3, and gear 14 are meshed together, with gear 14 serving as the intermediate idler gear. Gear 1 and gear 13 are mounted on shaft S3 via a spline, and gear 14 is mounted on shaft S4 via a spline. Gear 2 and gear 3 are mounted on shaft S1 via needle roller bearings, and gear 2 and gear 3 are respectively connected to the left and right ends of reversing synchronizer C1 via splines.

[0019] Furthermore, shafts S1, S2, S8, and S9 are coaxial; shafts S3, S5, and S7 are coaxial, with shaft S3 parallel to the axis of shaft S1 and both located on the vertical plane of the tractor's center; shafts S4 and S6 are parallel to the axis of shaft S1, and viewed from the rear axle of the tractor towards the engine, shafts S4 and S6 are located on the left and right sides of the vertical plane of the tractor's center, respectively.

[0020] The engine power is divided into two paths: one path transmits power through shaft 1 (S1) to the shuttle reversing module (synchronous reversing). The output of the shuttle reversing module (synchronous reversing) is connected to the main transmission module through shaft 2 (S2). Power is then transmitted to the main transmission module through shaft 2 (S2). The main transmission module is connected to the auxiliary transmission module through shaft 5 (S5) and shaft 7 (S7). Power is then transmitted through shaft 5 (S5) to shaft 6 (S6) in the crawler gear module, and then to shaft 7 (S7) in the auxiliary transmission module. Power is then transmitted through gear 24 (24) to gear 25 (25), through the differential assembly and final drive assembly in the rear axle module, and finally output to the left and right tires through the final drive assembly. The other path transmits power through shaft 8 (S8) to shaft 9 (S9), and then to the PTO power output module. Power is then output through the meshing of gears 26 (26) and 28 (28), and gears 27 (27) and 29 (29).

[0021] like Figure 2As shown, taking a shuttle reversing module as an example, a multi-functional modular tractor transmission system includes an engine and a gearbox. The gearbox has power reversing and creeping gear functions. The gearbox includes a main transmission module, a secondary transmission module, a rear axle module, a PTO power output module, and a shuttle reversing module. The shuttle reversing module is detachably installed between the engine and the main transmission module. The main transmission module contains gears 4, 5, 6, 7, 15, 16, 17, 18, shafts S2 and S8, shaft S5, synchronizer C2 (I-II) and synchronizer C3 (III-IV), gears 4 and 10. Gears 5 and 16 are meshed together; gears 6 and 17 are meshed together; gears 7 and 18 are meshed together; gears 4 and 5 are splined on shaft 2 (S2); gears 6 and 7 are needle-rolled on shaft 2 (S2) and connected to both ends of synchronizer C3 (III-IV); gears 15 and 16 are mounted on shaft 5 (S5) and connected to both ends of synchronizer C2 (I-II); gears 17 and 18 are splined on shaft 5 (S5); shaft 2 (S2) is splined to the output end of the connecting module; gear 8 is installed inside the auxiliary transmission module. Gears 9, 10, 11, 12, 7 (shaft S7), PH section meshing sleeve C4, LM section meshing sleeve C5; Gears 8 and 9 are mounted on shaft S7 and connected to both ends of PH section meshing sleeve C4; Gears 10 and 11 are mounted on shaft S7 and connected to both ends of LM section meshing sleeve C5; Gear 8 is connected to shaft S5 via a spline; the rear axle module contains gears 24 and 25, shaft S7, shaft S9, differential assembly, and final drive assembly. Gear 24 is mounted on shaft S7, and gear 25 is bolted to the differential assembly. On the upper part, gears 24 and 25 mesh with each other; one end of the final drive assembly is connected to the differential assembly, and the other end is connected to the tire; one end of shaft 9 S9 is connected to shaft 8 S8 via a spline sleeve, and the other end is connected to the PTO power output module; the PTO power output module contains gears 26, 27, 28, 29, the PTO input shaft, and the PTO output shaft. Gears 26 and 27 are splined on the PTO input shaft; gears 28 and 29 are splined on the PTO output shaft and connected to both ends of the PTO shift sleeve.

[0022] Furthermore, the auxiliary transmission module is optionally equipped with a creeper gear module. The creeper gear module contains gears 19 (19), 20 (20), 21 (21), 22 (22), 23 (23), and shaft 6 (S6). Gears 19 (19), 22 (22), and 23 (23) are splined onto shaft 6 (S6). Gears 20 (20) and 21 (21) are loosely fitted onto shaft 6 (S6). Gear 19 (19) meshes with gear 8 (8) within the auxiliary transmission module; gear 20 (20) meshes with gear 9 (9) within the auxiliary transmission module; gear 21 (21) meshes with gear 10 (10) within the auxiliary transmission module; gear 22 (22) meshes with gear 11 (11) within the auxiliary transmission module; and gear 23 (23) meshes with gear 12 (12) within the auxiliary transmission module.

[0023] Furthermore, the rear axle module is optionally equipped with a PTO wet clutch module, which is located between axle nine S9 and the PTO power output module.

[0024] Furthermore, the shuttle reversing module is equipped with shaft S1, gear 1, gear 2, gear 3, gear 13, gear 14, shaft S3, shaft S4, shaft S8, and power reversing clutch C6. The input end of shaft S1 is connected to the engine, and the output end is connected to the power reversing clutch C6 via a spline. Gear 2 and gear 13 are meshed together, and gears 11, 3, and 14 are meshed together, with gear 14 serving as an intermediate idler gear. Gear 1 and gear 13 are splined on shaft S3, and gear 14 is splined on shaft S4. Gear 2 and gear 3 are mounted on shaft S1 via needle roller bearings, and are splined to the left and right ends of the power reversing clutch C6, respectively.

[0025] Furthermore, shafts S1, S2, S8, and S9 are coaxial; shafts S3, S5, and S7 are coaxial, with shaft S3 parallel to the axis of shaft S1 and both located on the vertical plane of the tractor's center; shafts S4 and S6 are parallel to the axis of shaft S1, and viewed from the rear axle of the tractor towards the engine, shafts S4 and S6 are located on the left and right sides of the vertical plane of the tractor's center, respectively.

[0026] The engine power is divided into two paths: one path is input through shaft 1 (S1) and transmitted to the shuttle reversing module (power reversing). The output of the shuttle reversing module (power reversing) is connected to the main transmission module through shaft 2 (S2). Power is transmitted to the main transmission module through shaft 2 (S2). In the main transmission module, shafts 5 (S5) and 7 (S7) are connected to the auxiliary transmission module. Power is transmitted through shaft 5 (S5) to shaft 6 (S6) in the crawler gear module, and then to shaft 7 (S7) in the auxiliary transmission module. Power is then transmitted through gear 24. The power is passed to gear 25, then through the differential assembly and final drive assembly in the rear axle module, and finally output to the left and right tires via the final drive assembly. Another path of power is transmitted through shaft 1 (S1) to shaft 8 (S8), then through shaft 8 (S8) to shaft 9 (S9), then through shaft 9 (S9) to the PTO wet clutch module, and then to the PTO power output module. The power is then output through the meshing of gears 26 (26) and 28 (28), and gears 27 (27) and 29 (29).

[0027] like Figure 3As shown, taking the Hi-Lo gear module as an example, this invention provides a multi-functional modular tractor transmission system, including an engine and a gearbox. The gearbox includes a main transmission module, a secondary transmission module, a rear axle module, a PTO power output module, and a connecting module. The connecting module is a shuttle reversing module or a Hi-Lo gear module, and the connecting module is detachably installed between the engine and the main transmission module. The main transmission module is equipped with gears 4, 5, 6, 7, 15, 16, 17, 18, shafts S2 and S8, shaft S5, I-II synchronizer, and III-IV synchronizer. Gear 4 and gear 15 are meshed together; gear 5 and gear 16 are meshed together; gear 6 and gear 17 are meshed together; gear 7 and gear 18 are meshed together; gear 4 and gear 5 are splined on shaft 2 S2; gear 6 and gear 7 are needle-rolled on shaft 2 S2 and connected to both ends of synchronizer III-IV; gear 15 and gear 16 are mounted on shaft 5 S5 and connected to both ends of synchronizer I-II; gear 17 and gear 18 are splined on shaft 5 S5; shaft 2 S2 is splined to the output end of the connecting module; gears are installed inside the auxiliary transmission module. Gear 8 (8), Gear 9 (9), Gear 10, Gear 11 (11), Gear 12 (12), Shaft 7 (S7), PH section meshing sleeve, LM section meshing sleeve. Gear 8 (8) and Gear 9 (9) are mounted on Shaft 7 (S7) and connected to both ends of the PH section meshing sleeve. Gear 10 and Gear 11 (11) are mounted on Shaft 7 (S7) and connected to both ends of the LM section meshing sleeve. Gear 8 (8) is connected to Shaft 5 (S5) via a spline. The rear axle module contains Gear 24 (24), Gear 25 (25), Shaft 7 (S7), Shaft 9 (S9), differential assembly, and final drive assembly. Gear 24 (24) is mounted on Shaft 7 (S7). Gear 25 (25) is bolted to the differential assembly. Gear 24 and Gear 25 are meshed together; one end of the final drive assembly is connected to the differential assembly, and the other end is connected to the tire; one end of shaft 9 S9 is connected to shaft 8 S8 via a spline sleeve, and the other end is connected to the PTO power output module; the PTO power output module contains gear 26, gear 27, gear 28, gear 29, PTO input shaft and PTO output shaft. Gear 26 and Gear 27 are splined on the PTO input shaft; Gear 28 and Gear 29 are splined on the PTO output shaft and connected to both ends of the PTO shift sleeve.

[0028] Furthermore, a crawler gear module is optionally installed within the auxiliary transmission module. This crawler gear module contains gears 19 (19), 20, 21 (21), 22 (22), 23 (23), and shaft 6 (S6). Gears 19 (19), 22 (22), and 23 (23) are splined onto shaft 6 (S6). Gears 20 and 21 (21) are loosely fitted onto shaft 6 (S6). Gear 19 (19) meshes with gear 8 (8) within the auxiliary transmission module; gear 20 meshes with gear 9 (9) within the auxiliary transmission module; gear 21 (21) meshes with gear 10 within the auxiliary transmission module; gear 22 (22) meshes with gear 11 (11) within the auxiliary transmission module; and gear 23 (23) meshes with gear 12 (12) within the auxiliary transmission module.

[0029] Furthermore, the rear axle module is optionally equipped with a PTO wet clutch module, which is located between axle nine S9 and the PTO power output module.

[0030] Furthermore, the Hi-Lo gear module contains gears 30, 31, 32, 33, 34, 35, 36, shaft 10 (S10), shaft 2 (S2), shaft 3 (S3), shaft 4 (S4), reversing synchronizer C1, and Hi-Lo gear clutch. Gear 30 is mounted on shaft 10 (S10) via a needle roller bearing. Gears 34 (34), 31, and 36 (36) are mounted on shaft 3 (S3) via splines. Gear 35 (35) is mounted on shaft 4 (S4) via a spline. Gear 33 (33)... Gear 33 is mounted on shaft S2 via needle roller bearings. Gear 30 is mounted on the output shaft of the Hi-Lo gear clutch via needle roller bearings. Gear 30 meshes with gear 34 and 34. Gear 33 meshes with gear 36 and 36. Gear 32, 35, and 31 mesh with each other. Gear 35 is an intermediate idler gear. The two ends of the reversing synchronizer C1 are connected to gear 32 and 33 respectively. The two ends of the Hi-Lo gear clutch are connected to gear 30 and the output shaft of the Hi-Lo gear clutch respectively.

[0031] Furthermore, shafts S2, S8, S9, and S10 are coaxial; shafts S3, S5, and S7 are coaxial, with shaft S3 parallel to the axis of shaft S1 and both located on the vertical plane of the tractor's center; shafts S4 and S6 are parallel to the axis of shaft S1, and viewed from the rear axle of the tractor towards the engine, shafts S4 and S6 are located on the left and right sides of the vertical plane of the tractor's center, respectively.

[0032] The engine power is divided into two paths: one path transmits power through shaft 10 (S10) to the Hi-Lo gear module. The output of the Hi-Lo gear module is connected to the main transmission module through shaft 2 (S2). Power is then transmitted through shaft 2 (S2) to the main transmission module. Shaft 2 (S2) and shaft 7 (S7) in the main transmission module are connected to the auxiliary transmission module. Power is then transmitted through shaft 5 (S5) to shaft 6 (S6) in the creep gear module F, and then to shaft 7 (S7) in the auxiliary transmission module. Power is then transmitted through gear 24 (24) to gear 25 (25), through the differential assembly and final drive assembly in the rear axle module, and finally output to the left and right tires via the final drive assembly. The other path transmits power through shaft 10 (S10) to shaft 8 (S8), then through shaft 8 (S8) to shaft 9 (S9), and then through shaft 9 (S9) to the PTO wet clutch module, and then to the PTO power output module. Power is then output through the meshing of gears 26 (26) and 28 (28), and gears 27 (27) and 29 (29).

[0033] With the shuttle shifting module and crawler shifting module configured, the drivetrain has 16 forward gears (F) and 16 reverse gears (R); with the Hi-Lo shifting module and crawler shifting module configured, the drivetrain has 32 forward gears (F) and 16 reverse gears (R).

[0034] The transmission system is divided into multiple functional modules, including the main transmission module, auxiliary transmission module, rear axle module, PTO power output module and connection module, creeper gear module, and PTO wet clutch module. During gearbox assembly, these modules can be combined as needed to meet the demands of complex terrain and diverse operational requirements. Furthermore, the transmission system adopts a two-shaft spatial planar layout, resulting in good manufacturability and convenient installation.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A multi-functional modular tractor transmission system, comprising an engine and a gearbox, characterized in that: The transmission includes a main transmission module, a secondary transmission module, a rear axle module, a PTO power output module, and a connecting module. The connecting module is either a shuttle reversing module or a Hi-Lo gear module, and the connecting module is detachably installed between the engine and the main transmission module. The main transmission module contains gears 4 (4), 5 (5), 6 (6), 7 (7), 15 (15), 16 (16), 17 (17), 18 (18), shaft 2 (S2), shaft 8 (S8), shaft 5 (S5), I-II synchronizer (C2), and III-IV synchronizer (C3). Gears 4 (4) and 15 (15) are meshed together, gears 5 (5) and 16 (16) are meshed together, gears 6 (6) and 17 (17) are meshed together, and gear 7 (7)... Gear 18 (18) meshes with each other, gear 4 (4) and gear 5 (5) are mounted on shaft 2 (S2) by splines, gear 6 (6) and gear 7 (7) are mounted on shaft 2 (S2) by needle rollers and connected to both ends of synchronizer III-IV (C3), gear 15 (15) and gear 16 (16) are mounted on shaft 5 (S5) and connected to both ends of synchronizer I-II (C2), gear 17 (17) and gear 18 (18) are mounted on shaft 5 (S5) by splines, and shaft 2 (S2) is connected to the output end of the connection module by splines; The auxiliary transmission module is equipped with gear 8 (8), gear 9 (9), gear 10, gear 11 (11), gear 12 (12), shaft 7 (S7), PH section meshing sleeve, and LM section meshing sleeve. Gear 8 (8) and gear 9 (9) are installed on shaft 7 (S7) and connected to both ends of PH section meshing sleeve respectively. Gear 10 and gear 11 (11) are installed on shaft 7 (S7) and connected to both ends of LM section meshing sleeve respectively. Gear 8 (8) is connected to shaft 5 (S5) through a spline. The rear axle module houses gear 24 (24), gear 25 (25), shaft 7 (S7), shaft 9 (S9), a differential assembly, and a final drive assembly. Gear 24 (24) is mounted on shaft 7 (S7), and gear 25 (25) is bolted to the differential assembly. Gear 24 (24) and gear 25 (25) are meshed together. One end of the final drive assembly is connected to the differential assembly, and the other end is connected to the tire. One end of shaft 9 (S9) is connected to shaft 8 (S8) via a spline sleeve, and the other end is connected to the PTO power output module. The PTO power output module contains gears 26 (26), 27 (27), 28 (28), 29 (29), a PTO input shaft, and a PTO output shaft. Gears 26 (26) and 27 (27) are mounted on the PTO input shaft via splines. Gears 28 (28) and 29 (29) are mounted on the PTO output shaft via splines and connected to both ends of the PTO shift sleeve.

2. The multi-functional modular tractor transmission system according to claim 1, characterized in that: It also includes a creeper module, which is detachably installed in the auxiliary transmission module. The creeper module contains gear 19 (19), gear 20, gear 21 (21), gear 22 (22), gear 23 (23) and shaft 6 (S6). Gear 19 (19), gear 22 (22) and gear 23 (23) are installed on shaft 6 (S6) via splines. Gear 20 and gear 21 (21) are loosely installed on shaft 6 (S6). Gear 19 (19) meshes with gear 8 (8) in the auxiliary transmission module. Gear 20 meshes with gear 9 (9) in the auxiliary transmission module. Gear 21 (21) meshes with gear 10 in the auxiliary transmission module. Gear 22 (22) meshes with gear 11 (11) in the auxiliary transmission module. Gear 23 (23) meshes with gear 12 (12) in the auxiliary transmission module.

3. A multi-functional modular tractor transmission system according to claim 1 or 2, characterized in that: It also includes a PTO wet clutch module, which is detachably installed in the rear axle module and located between shaft nine (S9) and the PTO power output module.

4. The multi-functional modular tractor transmission system according to claim 1, characterized in that: When the connecting module is a shuttle reversing module, the shuttle reversing module is equipped with shaft one (S1), gear one (1), gear two, gear three, gear thirteen (13), gear fourteen (14), shaft three (S3), shaft four (S4), shaft eight (S8), and reversing synchronizer (C1). The output end of shaft one (S1) is connected to the engine, and the output end is connected to the reversing synchronizer (C1) one through a spline. Gear two and gear thirteen (13) are meshed with each other. Gear one (1), gear three and gear fourteen (14) are meshed with each other. Among them, gear fourteen (14) is the intermediate idler gear. Gear one (1) and gear thirteen (13) are mounted on shaft three (S3) through a spline. Gear fourteen (14) is mounted on shaft four (S4) through a spline. Gear two and gear three are mounted on shaft one (S1) through needle roller bearings. Gear two and gear three are respectively connected to the left and right ends of the reversing synchronizer (C1) one through splines.

5. A multi-functional modular tractor transmission system according to claim 1, characterized in that: When the connecting module is a shuttle reversing module, the shuttle reversing module is equipped with shaft one (S1), gear one (1), gear two, gear three, gear thirteen (13), gear fourteen (14), shaft three (S3), shaft four (S4), shaft eight (S8), and power reversing clutch (C6); the input end of shaft one (S1) is connected to the engine, and the output end is connected to the power reversing clutch (C6) through a spline; gear two and gear thirteen (13) are meshed with each other, and gear one (1), gear three and gear fourteen are meshed with each other, among which gear fourteen (14) is the intermediate idler gear; gear one (1) and gear thirteen (13) are mounted on shaft three (S3) through a spline; gear fourteen (14) is mounted on shaft four (S4) through a spline; gear two and gear three are mounted on shaft one (S1) through needle roller bearings, and gear two and gear three are respectively connected to the left and right ends of the power reversing clutch (C6) through splines.

6. A multi-functional modular tractor transmission system according to claim 1, characterized in that: When the connection module is a Hi-Lo gear module, the Hi-Lo gear module contains gears 30, 31, 32, 33, 34, 35, 36, shaft 10 (S10), shaft 2 (S2), shaft 3 (S3), shaft 4 (S4), a reversing synchronizer (C1), and a Hi-Lo gear clutch. Gear 30 is mounted on shaft 10 (S10) via a needle roller bearing. Gears 34 (34), 31 (31), and 36 (36) are mounted on shaft 3 (S3) via splines. Gear 35 (35) is mounted on shaft 4 (S4) via splines. On the shaft, gear 33 (33) is mounted on shaft 2 (S2) via needle roller bearing. Gear 33 (33) is mounted on the output shaft of the Hi-Lo clutch via needle roller bearing. Gear 30 is meshed with gear 34 (34). Gear 33 (33) is meshed with gear 36 (36). Gear 32 (32), gear 35 (35) and gear 31 (31) are meshed with each other. Gear 35 (35) is an intermediate idler gear. The two ends of the reversing synchronizer (C1) are connected to gear 32 (32) and gear 33 (33) respectively. The two ends of the Hi-Lo clutch are connected to gear 30 and the output shaft of the Hi-Lo clutch respectively.

7. A multi-functional modular tractor transmission system according to claim 4 or 5, characterized in that: Shaft 1 (S1), Shaft 2 (S2), Shaft 8 (S8), and Shaft 9 (S9) are on the same axis; Shaft 3 (S3), Shaft 5 (S5), and Shaft 7 (S7) are on the same axis. Shaft 3 (S3) is parallel to the axis of Shaft 1 (S1) and both are located on the vertical plane of the tractor's center; Shaft 4 (S4) and Shaft 6 (S6) are both parallel to the axis of Shaft 1 (S1). When viewed from the rear axle of the tractor towards the engine, Shaft 4 (S4) and Shaft 6 (S6) are located on the left and right sides of the vertical plane of the tractor's center, respectively.

8. A multi-functional modular tractor transmission system according to claim 6, characterized in that: Shaft 2 (S2), shaft 8 (S8), shaft 9 (S9), and shaft 10 (S10) are on the same axis; shaft 3 (S3), shaft 5 (S5), and shaft 7 (S7) are on the same axis. Shaft 3 (S3) is parallel to the axis of shaft 1 (S1) and both are located on the vertical plane of the tractor's center; shaft 4 (S4) and shaft 6 (S6) are both parallel to the axis of shaft 1 (S1). When viewed from the rear axle of the tractor towards the engine, shaft 4 (S4) and shaft 6 (S6) are located on the left and right sides of the vertical plane of the tractor's center, respectively.

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