Four-parallel-shaft type tractor transmission mechanism based on PTO independence

Abstract

The utility model relates to the technical field of tractor transmission, in particular to an independent four-parallel-shaft type tractor transmission mechanism based on a PTO. The transmission mechanism comprises a transmission case and a transmission mechanism which is arranged on the transmission case and is of a four-parallel-shaft type structure, the transmission mechanism comprises a fourth shaft, a first shaft, a second shaft and a third shaft which are sequentially arranged in the transmission case from top to bottom, the first shaft is connected with an output shaft of an engine, and a PTO wet clutch is installed on the first shaft; the second shaft is provided with a reverse gear wet clutch; a high-gear wet clutch is mounted on the third shaft; a low-gear wet clutch is mounted on the fourth shaft; and the gear pump is meshed with a power output idle gear of the fourth shaft through a power output gear. The four-parallel-shaft type structure is adopted, the layout is reasonable, the structure is compact, under the condition that the original tractor structure is not changed, the functions of power reversing, PTO, high gear and low gear can be achieved by directly adding a transmission mechanism, and the four modules can be independently selected and matched.

Description

Technical Field

[0001] This utility model relates to the field of tractor transmission technology, specifically to a four-parallel-shaft tractor transmission mechanism based on PTO independent transmission. Background Technology

[0002] Traditional tractor transmission mechanisms suffer from numerous problems in existing technologies. Their structures are complex, their functions are relatively limited, and their layouts are often inefficient. For example, to achieve power reversal, PTO (Power To-O), and high / low gear functions, some transmission mechanisms require significant modifications to the original tractor structure, undoubtedly increasing modification costs and difficulty. Clutches in traditional transmission mechanisms, such as the four-clutch tractor gearbox disclosed in Chinese Patent Publication No. CN217355416U, often employ dry clutches. This type of clutch results in long power switching times, low operating efficiency under frequent turning conditions, and increased driver fatigue. Furthermore, the final stage of power transmission in traditional mechanisms makes it difficult to easily adjust the output gear ratio, failing to meet the diverse gear ratio requirements of different customers. Therefore, designing a new tractor transmission mechanism to solve these problems is essential. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a PTO-based independent four-parallel shaft tractor transmission mechanism.

[0004] The technical solution adopted in this utility model is as follows:

[0005] A PTO-based independent four-parallel-shaft tractor transmission mechanism includes a transmission box and a four-parallel-shaft transmission mechanism mounted on the transmission box. The transmission mechanism includes four shafts, a first shaft, a second shaft, and a third shaft arranged sequentially from top to bottom within the transmission box, wherein:

[0006] One shaft is connected to the engine output shaft and is equipped with a PTO wet clutch. The low reverse drive gear on one side meshes with the reverse gear of the second shaft, the high drive gear meshes with the high idler gear of the third shaft, and the high drive gear meshes with the power output idler gear of the fourth shaft. The reduction driven gear on the other side meshes with the reduction drive gear of the second shaft, and the travel output shaft meshes with the reduction driven gear.

[0007] The second shaft is equipped with a reverse wet clutch. The reverse gear on one side meshes with the low reverse drive gear of the first shaft, and the travel driven gear on the other side meshes with the high gear of the third shaft. The reduction drive gear meshes with the reduction driven gear of the first shaft.

[0008] The three shafts are equipped with a high-gear wet clutch. The high-gear idler gear on one side meshes with the high-gear drive gear of the first shaft, and the high-gear gear on the other side meshes with the travel driven gear of the second shaft.

[0009] The four shafts are equipped with a low-gear wet clutch. The low-gear idler gear on one side meshes with the low reverse gear drive gear of the first shaft, and the power output idler gear meshes with the high gear drive gear of the first shaft. The low-gear gear on the other side meshes with the travel driven gear of the second shaft.

[0010] The gear pump engages with the power output idler gear of the four shafts via a power output gear.

[0011] This technical solution adopts a four-parallel-shaft structure: one shaft with a PTO wet clutch, the second shaft is the reverse gear shaft, the third shaft is the high-gear forward shaft, and the fourth shaft is the low-gear forward shaft. This reduces axial space, resulting in a reasonable layout and compact structure. Without altering the original tractor structure, power reversing, PTO, and high / low gear functions can be achieved simply by adding a transmission mechanism. Since these four modules are also separate modules, customers can select and configure them according to their needs. The power reversing, PTO, and high / low gear wet electronically controlled multi-plate clutches replace the traditional dry clutches, achieving millisecond-level power switching. This increases work efficiency by 30% and reduces driver fatigue by 50% under frequent turning conditions. A pair of reduction gears is added to the final stage of power transmission, allowing for easy adjustment of the output transmission ratio to generally meet the transmission ratio requirements of different customers. Through electro-hydraulic coordinated control, reversing shock is eliminated, achieving stepless power connection and ensuring equipment lifespan and operational continuity.

[0012] In addition, the PTO-based independent four-parallel-shaft tractor transmission mechanism proposed above according to this utility model may also have the following additional technical features:

[0013] According to one embodiment of the present invention, when the PTO wet clutch is engaged, power is independently transmitted to the PTO output shaft, and the PTO output shaft is separated from the travel output shaft.

[0014] In addition, the PTO-based independent four-parallel-shaft tractor transmission mechanism proposed above according to this utility model may also have the following additional technical features:

[0015] According to one embodiment of the present invention, when the reverse wet clutch is engaged, the engine power is transmitted from the low reverse gear drive gear of the first shaft to the reverse gear of the second shaft, and then transmitted to the travel output shaft after being reduced in speed and torque by the reduction drive gear and reduction driven gear of the second shaft, thereby driving the tractor to reverse.

[0016] According to one embodiment of the present invention, when the high-gear wet clutch is engaged, the engine power is transmitted from the high-gear drive gear of the first shaft to the high-gear idler gear of the third shaft, and then from the high-gear wet clutch and the high-gear gear to the travel driven gear of the second shaft. Finally, after being decelerated and torque-increasing by the reduction drive gear and the reduction driven gear, the power is output to the travel output shaft to drive the tractor to travel at high speed.

[0017] According to one embodiment of the present invention, when the low-gear wet clutch is engaged, the engine power is transmitted from the low reverse gear drive gear of the first shaft to the low gear idler gear of the fourth shaft, and then from the low-gear wet clutch and the low gear to the travel driven gear of the second shaft. After being reduced in speed and increased in torque by the reduction gear set, the power is output to the travel output shaft to drive the tractor to travel at a low speed.

[0018] According to one embodiment of the present invention, in the gear pump driven hydraulic system, the engine power is transmitted from the high-gear drive gear of the first shaft to the power output idler gear of the fourth shaft, and then transmitted to the gear pump via the power output gear.

[0019] According to one embodiment of the present invention, the reduction ratio between the walking output shaft and the reduction driven gear is 1:2.

[0020] According to one embodiment of the present invention, the shaft ends of the four parallel shaft structure are all made of tapered bearings processed by gear grinding.

[0021] Compared with the prior art, this utility model has the following advantages:

[0022] (1) Compact and multifunctional: It adopts a four-parallel shaft structure with a reasonable layout and compact structure. Without changing the original tractor structure, the transmission mechanism can be directly added to realize power reversal, PTO, high and low gear functions, and the four modules can be selected individually.

[0023] (2) High efficiency and comfort in operation: Power reversing, PTO and high and low gear wet electronic control multi-plate clutch replace the traditional dry clutch, realize millisecond-level power switching, improve the working efficiency by 30% and reduce driver fatigue by 50% in frequent steering conditions;

[0024] (3) Strong adaptability and long service life: The final stage of power transmission is equipped with a reduction gear, which can easily adjust the output transmission ratio to meet the transmission ratio requirements of different customers; eliminate the reversing impact, realize stepless power connection, and ensure the service life of the equipment. Attached Figure Description

[0025] Figure 1 This is one of the perspective views of this utility model.

[0026] Figure 2 This is the second perspective view of this utility model.

[0027] Figure 3This is one of the power transmission diagrams of this utility model.

[0028] Figure 4 This is the second power transmission diagram of this utility model.

[0029] In the diagram: 1. Transmission box; 2. Transmission mechanism; 21. Shaft 1; 22. Shaft 2; 23. Shaft 3; 24. Shaft 4; 25. Gear pump; 26. PTO wet clutch; 27. Reverse wet clutch; 28. High gear wet clutch; 29. ​​Low gear wet clutch; 210. PTO output shaft; 211. Travel output shaft; 212. Low reverse drive gear; 213. Reverse gear; 214. Reduction drive gear; 215. Reduction driven gear; 216. High gear drive gear; 217. High gear idler gear; 218. High gear; 219. Travel driven gear; 220. Low gear idler gear; 221. Low gear; 222. Power output idler gear; 223. Power output gear. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0031] Example 1

[0032] like Figure 1 and Figure 2 As shown, this embodiment provides a PTO-based independent four-parallel-shaft tractor transmission mechanism, including a transmission box 1 and a four-parallel-shaft transmission mechanism 2 disposed on the transmission box 1. The transmission mechanism 2 includes a four-shaft 24, a first-shaft 21, a second-shaft 22, and a third-shaft 23 arranged sequentially from top to bottom within the transmission box 1, wherein:

[0033] A shaft 21 is connected to the engine output shaft and is equipped with a PTO wet clutch 26. The low reverse gear drive gear 212 on one side meshes with the reverse gear of the second shaft 22, and the high gear drive gear 216 meshes with the high gear idler gear of the third shaft 23. The high gear drive gear 216 also meshes with the power output idler gear 222 of the fourth shaft 24. The reduction driven gear 215 on the other side meshes with the reduction drive gear 214 of the second shaft 22, and the travel output shaft 211 meshes with the reduction driven gear 215.

[0034] The second shaft 22 is equipped with a reverse wet clutch 27. The reverse gear on one side meshes with the low reverse drive gear 212 of the first shaft 21, and the travel driven gear 219 on the other side meshes with the high gear 218 of the third shaft 23. The reduction drive gear 214 meshes with the reduction driven gear 215 of the first shaft 21.

[0035] Three shafts 23 are equipped with a high-gear wet clutch 28. The high-gear idler gear on one side meshes with the high-gear drive gear 216 of the first shaft 21, and the high-gear gear 218 on the other side meshes with the travel driven gear 219 of the second shaft 22.

[0036] The four shafts 24 are equipped with a low-gear wet clutch 29. The low-gear idler gear on one side meshes with the low reverse gear drive gear 212 of the first shaft 21, and the power output idler gear 222 meshes with the high-gear drive gear 216 of the first shaft 21. The low-gear gear 221 on the other side meshes with the travel driven gear 219 of the second shaft 22.

[0037] The gear pump 25 meshes with the power output idler gear 222 of the four shaft 24 via the power output gear 223.

[0038] This technical solution adopts a four-parallel-shaft structure. Shaft 21 is a shaft 21 with a PTO wet clutch 26, shaft 22 is a reverse gear shaft, shaft 23 is a high-gear forward shaft, and shaft 24 is a low-gear forward shaft. This reduces axial space, resulting in a reasonable layout and compact structure. Without changing the original tractor structure, simply adding a transmission mechanism 2 can achieve power reversing, PTO, and high / low gear functions. Since these four modules are also individual modules, customers can select them according to their needs. The power reversing, PTO, and high / low gear wet electronically controlled multi-plate clutches replace the traditional dry clutches, achieving millisecond-level power switching. This increases work efficiency by 30% and reduces driver fatigue by 50% under frequent turning conditions. A pair of reduction gears is added to the final stage of power transmission, which can easily adjust the output transmission ratio to generally meet the transmission ratio requirements of different customers. Through electro-hydraulic coordinated control, reversing shock is eliminated, achieving stepless power connection and ensuring equipment life and operational continuity.

[0039] In addition, the PTO-based independent four-parallel-shaft tractor transmission mechanism proposed above according to this utility model may also have the following additional technical features:

[0040] According to one embodiment of the present invention, when the PTO wet clutch 26 is engaged, power is independently transmitted to the PTO output shaft 210, and the PTO output shaft 210 is separated from the travel output shaft 211.

[0041] In addition, the PTO-based independent four-parallel-shaft tractor transmission mechanism proposed above according to this utility model may also have the following additional technical features:

[0042] According to one embodiment of the present invention, when the reverse wet clutch 27 is engaged, the engine power is transmitted from the low reverse gear drive gear 212 of the first shaft 21 to the reverse gear of the second shaft 22, and then transmitted to the travel output shaft 211 after being reduced in speed and torque by the reduction drive gear 214 and the reduction driven gear 215 of the second shaft 22, thereby driving the tractor to reverse.

[0043] According to one embodiment of the present invention, when the high-gear wet clutch 28 is engaged, the engine power is transmitted through the high-gear drive gear 216 of the first shaft 21 to the high-gear idler gear of the third shaft 23, and then through the high-gear wet clutch 28 and the high-gear gear 218 to the travel driven gear 219 of the second shaft 22. Finally, after being reduced in speed and torque by the reduction drive gear 214 and the reduction driven gear 215, the power is output to the travel output shaft 211, driving the tractor to travel at high speed.

[0044] According to one embodiment of the present invention, when the low-gear wet clutch 29 is engaged, the engine power is transmitted through the low reverse gear drive gear 212 of the first shaft 21 to the low gear idler gear of the fourth shaft 24, and then through the low-gear wet clutch 29 and the low gear 221 to the travel driven gear 219 of the second shaft 22. After being reduced in speed and increased in torque by the reduction gear set, the power is output to the travel output shaft 211 to drive the tractor to travel at a low speed.

[0045] According to one embodiment of the present invention, the gear pump 25 drives the hydraulic system, and the engine power is transmitted to the power output idler wheel 222 of the four shafts 24 via the high-gear drive gear 216 of the first shaft 21, and then to the gear pump 25 via the power output gear 223.

[0046] According to one embodiment of the present invention, the reduction ratio between the walking output shaft 211 and the reduction passive gear 215 is 1:2.

[0047] According to one embodiment of the present invention, the shaft ends of the four parallel shaft structure are all made of tapered bearings processed by gear grinding.

[0048] The usage process of the above embodiments is as follows: Figure 3 and Figure 4As shown, the engine outputs power to the primary shaft 21. Depending on the operating conditions, each wet clutch functions. When the PTO wet clutch 26 engages, power is independently transmitted to the PTO output shaft 210, separating it from the travel output shaft 211, thus achieving power output. In reverse gear, when the reverse wet clutch 27 engages, power is transmitted via the low reverse drive gear 212 of the primary shaft 21 to the reverse gear of the secondary shaft 22, and then through the reduction gear set of the secondary shaft 22 to reduce speed and increase torque before reaching the travel output shaft 211, driving the tractor backward. In high gear, when the high gear wet clutch 28 engages, power is transmitted via the high gear drive gear 216 of the primary shaft 21 to the high gear idler gear of the tertiary shaft 23, and then through the high gear wet clutch 28 and the high gear 218. The power is transmitted to the driven gear 219 of the second shaft 22, and finally output to the travel output shaft 211 after being reduced in speed and increased in torque by the reduction gear set, driving the tractor to travel at high speed. When traveling in low gear, when the low gear wet clutch 29 is engaged, the power is transmitted to the low gear idler gear 212 of the first shaft 21 to the low gear idler gear of the fourth shaft 24, and then to the driven gear 219 of the second shaft 22 through the low gear wet clutch 29 and the low gear 221. After being reduced in speed and increased in torque by the reduction gear set, the power is output to the travel output shaft 211, driving the tractor to travel at low speed. At the same time, the engine power can also be transmitted to the power output idler gear 222 of the fourth shaft 24 through the high gear drive gear 216 of the first shaft 21, and then to the gear pump 25 through the power output gear 223 to drive the hydraulic system.

Claims

1. A four-parallel-shaft tractor transmission mechanism based on PTO (Pulse-Transfer-Independent) is characterized in that, It includes a transmission box (1) and a four-parallel-shaft transmission mechanism (2) disposed on the transmission box (1). The transmission mechanism (2) includes four shafts (24), one shaft (21), two shafts (22) and three shafts (23) disposed sequentially from top to bottom in the transmission box (1), wherein: A shaft (21) is connected to the engine output shaft and is equipped with a PTO wet clutch (26). The low reverse drive gear (212) on one side meshes with the reverse gear of the second shaft (22), the high drive gear (216) meshes with the high idler gear of the third shaft (23), and the high drive gear (216) meshes with the power output idler gear (222) of the fourth shaft (24). The reduction driven gear (215) on the other side meshes with the reduction drive gear (214) of the second shaft (22), and the travel output shaft (211) meshes with the reduction driven gear (215). The second shaft (22) is equipped with a reverse wet clutch (27). The reverse gear on one side meshes with the low reverse drive gear (212) of the first shaft (21), and the driving driven gear (219) on the other side meshes with the high gear gear (218) of the third shaft (23). The reduction drive gear (214) meshes with the reduction driven gear (215) of the first shaft (21). The three shafts (23) are equipped with a high-gear wet clutch (28). The high-gear idler gear on one side meshes with the high-gear drive gear (216) of the first shaft (21), and the high-gear gear (218) on the other side meshes with the travel driven gear (219) of the second shaft (22). The four shafts (24) are equipped with a low-gear wet clutch (29). The low-gear idler gear on one side meshes with the low reverse gear drive gear (212) of the first shaft (21), and the power output idler gear (222) meshes with the high gear drive gear (216) of the first shaft (21). The low-gear gear (221) on the other side meshes with the travel driven gear (219) of the second shaft (22). The gear pump (25) meshes with the power output idler wheel (222) of the four shaft (24) via the power output gear (223).

2. The PTO-based independent four-parallel-shaft tractor transmission mechanism as described in claim 1, characterized in that, When the PTO wet clutch (26) is engaged, power is transmitted independently to the PTO output shaft (210), which is separated from the travel output shaft (211).

3. The PTO-based independent four-parallel-shaft tractor transmission mechanism as described in claim 1, characterized in that, When the reverse wet clutch (27) is engaged, the engine power is transmitted from the low reverse gear drive gear (212) of the first shaft (21) to the reverse gear of the second shaft (22), and then through the reduction drive gear (214) and reduction passive gear (215) of the second shaft (22) to reduce speed and increase torque, and then transmitted to the travel output shaft (211) to drive the tractor to reverse.

4. The PTO-based independent four-parallel-shaft tractor transmission mechanism as described in claim 1, characterized in that, When the high-gear wet clutch (28) is engaged, the engine power is transmitted from the high-gear drive gear (216) of the first shaft (21) to the high-gear idler gear of the third shaft (23), and then from the high-gear wet clutch (28) and the high-gear gear (218) to the travel driven gear (219) of the second shaft (22). Finally, after being reduced in speed and torque by the reduction drive gear (214) and the reduction driven gear (215), the power is output to the travel output shaft (211) to drive the tractor to travel at high speed.

5. The PTO-based independent four-parallel-shaft tractor transmission mechanism as described in claim 1, characterized in that, When the low-gear wet clutch (29) is engaged, the engine power is transmitted through the low reverse gear drive gear (212) of the first shaft (21) to the low gear idler gear of the fourth shaft (24), and then through the low-gear wet clutch (29) and the low gear gear (221) to the travel driven gear (219) of the second shaft (22). After being reduced in speed and increased in torque by the reduction gear set, the power is output to the travel output shaft (211) to drive the tractor to travel at low speed.

6. The PTO-based independent four-parallel-shaft tractor transmission mechanism as described in claim 1, characterized in that, The gear pump (25) drives the hydraulic system. The engine power is transmitted from the high-gear drive gear (216) of the first shaft (21) to the power output idler gear (222) of the fourth shaft (24), and then to the gear pump (25) via the power output gear (223).

7. The PTO-based independent four-parallel-shaft tractor transmission mechanism as described in claim 1, characterized in that, The reduction ratio between the walking output shaft (211) and the reduction passive gear (215) is 1:

2.

8. The PTO-based independent four-parallel-shaft tractor transmission mechanism as described in claim 1, characterized in that, The shaft ends of the four parallel shaft structure are all made of tapered bearings processed by gear grinding.

Images