A type of agricultural machinery drive axle assembly

Abstract

This utility model belongs to the technical field of agricultural machinery transmission mechanisms, specifically referring to an agricultural machinery drive axle assembly. It includes a power input shaft, a first transmission shaft, a second transmission shaft, and a third transmission shaft rotatably mounted on a housing. The power input shaft is connected to the first transmission shaft via a forward gear transmission assembly, and to the second transmission shaft via a reverse gear transmission assembly. The first transmission shaft is connected to the second transmission shaft via a constant mesh gear set, and the second transmission shaft is connected to the third transmission shaft via a high / low gear transmission assembly. A central transmission gear is fixedly mounted on the third transmission shaft. The left and right half-shafts of the differential assembly are respectively connected to the left and right drive wheels. This utility model features a simple and compact structure with high space utilization. By simply adding a few gears and shafts, and utilizing the high / low gears and multiple forward and reverse gears, it achieves a doubled number of transmission gears, significantly expanding the speed ratio range, effectively meeting the multi-condition operation needs of agricultural machinery.

Description

Technical fields:

[0001] This utility model belongs to the technical field of agricultural machinery transmission mechanism, and specifically refers to an agricultural machinery drive axle assembly. Background technology:

[0002] The drive axle assembly of agricultural machinery (such as tractors and harvesters) is the core component of its transmission system. It is responsible for transmitting the engine's power, after torque conversion and speed adjustment via the gearbox, to the left and right drive wheels, and also for achieving differential function. In traditional agricultural machinery drive axles, the gearbox is usually integrated into the drive axle housing. Due to limited structural space, it often only provides a limited number of forward gears and one or two reverse gears. This simple gear configuration has significant limitations. This is because agricultural machinery requires greater traction and lower operating speeds (i.e., low-speed, high-torque conditions) when performing deep plowing, ditching, and heavy-load traction in the field to ensure operational effectiveness and overcome resistance. Conversely, higher speeds are needed for relocation, transportation, or travel on relatively hard, flat roads to improve efficiency and save time. Therefore, there is currently a lack of compact agricultural machinery drive assemblies on the market that can provide a wider range of gears to meet the needs of various operating conditions. Summary of the Invention:

[0003] The purpose of this utility model is to provide an agricultural machinery drive axle assembly, which, by simply adding a small number of gears and shafts, and by using high and low gears and multiple forward and reverse gears, obtains a transmission range that doubles in number and greatly expands the speed ratio range, effectively meeting the needs of agricultural machinery in various working conditions.

[0004] This utility model is implemented as follows:

[0005] An agricultural machinery drive axle assembly includes a power input shaft, a first transmission shaft, a second transmission shaft, and a third transmission shaft rotatably fitted on a housing. The power input shaft is connected to the first transmission shaft via a forward gear transmission assembly, and the power input shaft is connected to the second transmission shaft via a reverse gear transmission assembly. The first transmission shaft is connected to the second transmission shaft via a constant mesh gear set, and the second transmission shaft is connected to the third transmission shaft via a high / low gear transmission assembly. A central transmission gear is fixedly fitted on the third transmission shaft and meshes with the housing of the differential assembly. The left and right half-shafts of the differential assembly are respectively connected to the left and right drive wheels located outside the housing.

[0006] In the aforementioned agricultural machinery drive axle assembly, one end of the power input shaft extends outside the housing and is connected to a power clutch fitted with a driven pulley.

[0007] In the aforementioned agricultural machinery drive axle assembly, the forward gear transmission component includes a first-gear drive gear, a second-gear drive gear, a third-gear drive gear, and a fourth-gear drive gear rotatably mounted on the power input shaft. The transmission shaft is fixedly fitted with a first-gear driven gear meshing with the first-gear drive gear, a second-gear driven gear meshing with the second-gear drive gear, a third-gear driven gear meshing with the third-gear drive gear, and a fourth-gear driven gear meshing with the fourth-gear drive gear. The first-gear drive gear, the second-gear drive gear, the third-gear drive gear, and the fourth-gear drive gear are respectively engaged with the power input shaft through meshing sleeves or synchronizers.

[0008] In the above-mentioned agricultural machinery drive axle assembly, the reverse gear transmission component includes a reverse gear drive gear rotatably mounted on the power input shaft, and a reverse gear driven gear meshing with the reverse gear drive gear is fixedly mounted on the transmission shaft. The reverse gear drive gear is engaged with the power input shaft through a meshing sleeve or a synchronizer to rotate synchronously.

[0009] In the above-mentioned agricultural machinery drive axle assembly, the high and low gear transmission component includes a high gear drive gear and a low gear drive gear fixedly sleeved on the second transmission shaft. The third transmission shaft is rotatably fitted with a high gear driven gear that meshes with the high gear drive gear and a low gear driven gear that meshes with the low gear drive gear. The third transmission shaft is engaged with the high gear driven gear or the low gear driven gear through a high and low gear meshing sleeve or a synchronizer to rotate synchronously.

[0010] In the above-mentioned agricultural machinery drive axle assembly, the constant mesh gear set includes a constant mesh gear fixedly sleeved on a transmission shaft, and the high-gear drive gear meshes with the constant mesh gear for transmission.

[0011] In the above-mentioned agricultural machinery drive axle assembly, a left output shaft and a right output shaft located on the same axis are rotatably connected to the housing. The opposite ends of the left and right output shafts extend outward from the housing and are respectively connected to the left drive wheel and the right drive wheel. The left and right half-shafts of the differential assembly are rotatably connected to the housing and are fitted with output drive gears. The opposite ends of the left and right output shafts are fitted with output driven gears that mesh with the corresponding output drive gears.

[0012] In the above-mentioned agricultural machinery drive axle assembly, a four-shaft drive shaft and a four-drive drive shaft are rotatably connected to the housing. A drive gear is fixedly mounted on the three-shaft drive shaft. A driven gear that meshes with the drive gear is rotatably mounted on the four-shaft drive shaft. The four-shaft drive shaft is engaged with the driven gear through a four-drive engagement sleeve or a synchronizer to achieve synchronous rotation of the three-shaft drive shaft and the four-shaft drive shaft. The four-drive drive shaft and the four-shaft drive shaft are connected and their axes are perpendicular to each other.

[0013] In the above-mentioned agricultural machinery drive axle assembly, a four-wheel drive drive bevel gear is fixedly sleeved on the four-wheel drive shaft, a four-wheel drive driven bevel gear that meshes with the four-wheel drive drive bevel gear is fixedly sleeved on the inner end of the four-wheel drive drive shaft, and the outer end of the four-wheel drive drive shaft extends out of the housing and is connected to the external rear drive mechanism for transmission.

[0014] In the above-mentioned agricultural machinery drive axle assembly, one end of the three transmission shafts extends out of the housing and is connected to a brake that is fixedly engaged with the housing or the outside.

[0015] The outstanding advantages of this utility model compared to the prior art are:

[0016] This utility model has a simple and compact structure with high space utilization. By simply adding a small number of gears and shafts, and with the cooperation of high and low gears and multiple forward and reverse gears, the number of transmission gears is doubled and the speed ratio range is greatly expanded, effectively meeting the needs of agricultural machinery in multiple working conditions. Attached image description:

[0017] Figure 1 This is a simplified transmission diagram of the drive axle assembly of this utility model.

[0018] In the diagram: 1. Gearbox housing; 2. Power input shaft; 3. Drive shaft 1; 4. Drive shaft 2; 5. Drive shaft 3; 6. Differential assembly; 7. Central drive gear; 8. Left drive wheel; 9. Right drive wheel; 10. Power clutch; 11. First gear drive gear; 12. Second gear drive gear; 13. Third gear drive gear; 14. Fourth gear drive gear; 15. First gear driven gear; 16. Second gear driven gear; 17. Third gear driven gear; 18. Fourth gear driven gear; 19. Reverse drive gear; 20. Reverse driven gear; 21. High-gear drive gear; 22. Low-gear drive gear; 23. High-gear driven gear; 24. Low-gear driven gear; 25. High / low gear meshing sleeve or synchronizer; 26. Constant mesh gear; 27. Left output shaft; 28. Right output shaft; 29. ​​Output drive gear; 30. Output driven gear; 31. Four-wheel drive shaft; 32. Four-wheel drive drive shaft; 33. Transfer drive gear; 34. Transfer driven gear; 35. Four-wheel drive meshing sleeve or synchronizer; 36. Four-wheel drive drive bevel gear; 37. Four-wheel drive driven bevel gear; 38. Brake. Detailed implementation method:

[0019] The present invention will be further described below with reference to specific embodiments. See also: Figure 1 :

[0020] An agricultural machinery drive axle assembly includes a power input shaft 2, a first transmission shaft 3, a second transmission shaft 4, and a third transmission shaft 5 rotatably fitted on a housing 1. The power input shaft 2 is connected to the first transmission shaft 3 via a forward gear transmission assembly, and the power input shaft 2 is connected to the second transmission shaft 4 via a reverse gear transmission assembly. The first transmission shaft 3 is connected to the second transmission shaft 4 via a constant mesh gear set, and the second transmission shaft 4 is connected to the third transmission shaft 5 via a high / low gear transmission assembly. A central transmission gear 7 is fixedly fitted on the third transmission shaft 5 and meshes with the housing of a differential assembly 6. The left and right half-shafts of the differential assembly 6 are respectively connected to a left drive wheel 8 and a right drive wheel 9 located outside the housing 1.

[0021] This utility model has a simple and compact structure with high space utilization. By simply adding a small number of gears and shafts, and with the cooperation of high and low gears and multiple forward and reverse gears, the number of transmission gears is doubled and the speed ratio range is greatly expanded, effectively meeting the needs of agricultural machinery in multiple working conditions.

[0022] In this embodiment, one end of the power input shaft 2 extends out of the housing 1 and is connected to the power clutch 10, which is fitted with a driven pulley. That is, the power output of the engine is directly transmitted to the driven pulley through the flywheel and the driving pulley. The driven pulley is engaged with the power input shaft 2 through the power clutch 10 to achieve stable power transmission. Furthermore, the specific number of gears and transmission structure of the forward gear transmission assembly are as follows: The forward gear transmission assembly includes a first gear drive gear 11, a second gear drive gear 12, a third gear drive gear 13, and a fourth gear drive gear 14 rotatably mounted on the power input shaft 2. The transmission shaft 3 is fixedly fitted with a first gear driven gear 15 that meshes with the first gear drive gear 11, a second gear driven gear 16 that meshes with the second gear drive gear 12, a third gear driven gear 17 that meshes with the third gear drive gear 13, and a fourth gear driven gear 18 that meshes with the fourth gear drive gear 14. The first gear drive gear 11, the second gear drive gear 12, the third gear drive gear 13, and the fourth gear drive gear 14 are respectively engaged with the power input shaft 2 through meshing sleeves or synchronizers. Correspondingly, the transmission structure adopted by the reverse gear transmission assembly is as follows: the reverse gear transmission assembly includes a reverse gear drive gear 19 rotatably mounted on the power input shaft 2, and a reverse gear driven gear 20 that meshes with the reverse gear drive gear 19 is fixedly mounted on the transmission shaft 4. The reverse gear drive gear 19 is engaged with the power input shaft 2 through a meshing sleeve or a synchronizer to rotate synchronously.

[0023] It should be noted that the first gear drive gear 11 and the second gear drive gear 12, and the third gear drive gear 13 and the fourth gear drive gear 14 can each share a meshing sleeve or synchronizer. That is, the first gear drive gear 11 or the second gear drive gear 12 can be engaged with the power input shaft 2 through the meshing sleeve or synchronizer located between the first gear drive gear 11 and the second gear drive gear 12 to rotate synchronously, and the third gear drive gear 13 or the fourth gear drive gear 14 can be engaged with the power input shaft 2 through the meshing sleeve or synchronizer located between the third gear drive gear 13 and the fourth gear drive gear 14 to rotate synchronously.

[0024] In this embodiment, the power input shaft 2 is provided with three meshing sleeves or synchronizers, namely a first gear meshing sleeve or synchronizer, a second gear or reverse gear meshing sleeve or synchronizer, and a third and fourth gear meshing sleeve or synchronizer. That is, the first gear drive gear 11 can be engaged with the power input shaft 2 through the first gear meshing sleeve or synchronizer to rotate synchronously, the second gear drive gear 12 or reverse gear drive gear 19 can be engaged with the power input shaft 2 through the second gear or reverse gear meshing sleeve or synchronizer to rotate synchronously, and the third gear drive gear 13 or fourth gear drive gear 14 can be engaged with the power input shaft 2 through the third and fourth gear meshing sleeves or synchronizers to rotate synchronously.

[0025] The specific structure of the high-low speed transmission assembly is as follows: the high-low speed transmission assembly includes a high-gear drive gear 21 and a low-gear drive gear 22 fixedly sleeved on the transmission shaft 4. The transmission shaft 5 is rotatably fitted with a high-gear driven gear 23 that meshes with the high-gear drive gear 21 and a low-gear driven gear 24 that meshes with the low-gear drive gear 22. The transmission shaft 5 is connected to the high-gear driven gear 23 or the low-gear driven gear 24 through a high-low gear meshing sleeve or a synchronizer 25 to rotate synchronously.

[0026] Meanwhile, in order to reduce the number of gears, the constant mesh gear set includes a constant mesh gear 26 fixedly sleeved on the transmission shaft 3, and the high-gear drive gear 21 meshes with the constant mesh gear 26 for transmission.

[0027] The specific transmission structure between the left and right half-shafts of the differential assembly 6 and the left drive wheel 8 and right drive wheel 9 is as follows: a left output shaft 27 and a right output shaft 28 located on the same axis are rotatably connected to the housing 1. The opposite ends of the left output shaft 27 and the right output shaft 28 extend outward from the housing 1 and are respectively connected to the left drive wheel 8 and the right drive wheel 9. The left and right half-shafts of the differential assembly 6 are rotatably connected to the housing 1 and are fitted with output drive gears 29. The opposite ends of the left output shaft 27 and the right output shaft 28 are fitted with output driven gears 30 that mesh with the corresponding output drive gears 29.

[0028] Considering that some agricultural machinery requires four-wheel drive, this product designs the drive axle assembly as a split-drive system, allowing for switchable power transmission paths of both four-wheel drive and standalone front drive. Specifically, a four-shaft drive shaft 31 and a four-wheel drive shaft 32 are rotatably connected to the housing 1. A drive gear 33 is fixedly mounted on the three-shaft drive shaft 5, and a driven gear 34 meshing with the drive gear 33 is rotatably mounted on the four-shaft drive shaft 31. The four-shaft drive shaft 31 engages with the driven gear 34 via a four-wheel drive engagement sleeve or a synchronizer 35 to achieve synchronous rotation between the three-shaft drive shaft 5 and the four-shaft drive shaft 31. The four-wheel drive shaft 32 is connected to the four-shaft drive shaft 31, and their axes are perpendicular. Furthermore, a four-wheel drive drive bevel gear 36 is fixedly mounted on the four-shaft drive shaft 31, and a driven bevel gear 37 meshing with the drive gear 36 is fixedly mounted on the inner end of the four-wheel drive shaft 32. The outer end of the four-wheel drive shaft 32 extends beyond the housing 1 and is connected to an external rear-drive mechanism.

[0029] In order to achieve the purpose of transmission braking of the drive axle, one end of the transmission three shafts 5 extends out of the housing 1 and is connected to a brake 38 that is fixedly engaged with the housing 1 or the outside.

[0030] The above embodiments are only one of the preferred embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all equivalent changes made in accordance with the shape, structure and principle of this utility model should be covered within the protection scope of this utility model.

Claims

1. An agricultural machine drive axle assembly, characterized by: It includes a power input shaft (2), a transmission shaft (3), a transmission shaft (4), and a transmission shaft (5) that are rotatably fitted on the housing (1). The power input shaft (2) is connected to the transmission shaft (3) via a forward gear transmission assembly. The power input shaft (2) is connected to the transmission shaft (4) via a reverse gear transmission assembly. The transmission shaft (3) is connected to the transmission shaft (4) via a constant mesh gear set. The transmission shaft (4) is connected to the transmission shaft (5) via a high-low gear transmission assembly. A central transmission gear (7) is fixedly mounted on the transmission shaft (5) and meshes with the housing of the differential assembly (6). The left and right half shafts of the differential assembly (6) are respectively connected to the left drive wheel (8) and the right drive wheel (9) located outside the housing (1).

2. The agricultural machine drive axle assembly of claim 1, wherein: One end of the power input shaft (2) extends out of the housing (1) and is connected to the power clutch (10) fitted with a driven pulley.

3. The agricultural machine drive axle assembly of claim 1, wherein: The forward gear transmission assembly includes a first gear drive gear (11), a second gear drive gear (12), a third gear drive gear (13), and a fourth gear drive gear (14) rotatably mounted on the power input shaft (2). The transmission shaft (3) is fixedly fitted with a first gear driven gear (15) meshing with the first gear drive gear (11), a second gear driven gear (16) meshing with the second gear drive gear (12), a third gear driven gear (17) meshing with the third gear drive gear (13), and a fourth gear driven gear (18) meshing with the fourth gear drive gear (14). The first gear drive gear (11), the second gear drive gear (12), the third gear drive gear (13), and the fourth gear drive gear (14) are respectively connected to the power input shaft (2) through meshing sleeves or synchronizers.

4. The agricultural machine drive axle assembly of claim 1 or 3, wherein: The reverse gear transmission assembly includes a reverse gear drive gear (19) rotatably mounted on the power input shaft (2), and a reverse gear driven gear (20) meshing with the reverse gear drive gear (19) is fixedly mounted on the transmission shaft (4). The reverse gear drive gear (19) is engaged with the power input shaft (2) through a meshing sleeve or a synchronizer to rotate synchronously.

5. The agricultural machine drive axle assembly of claim 1, wherein: The high and low gear transmission assembly includes a high gear drive gear (21) and a low gear drive gear (22) fixedly mounted on the transmission shaft (4). The transmission shaft (5) is rotatably mounted with a high gear driven gear (23) meshing with the high gear drive gear (21) and a low gear driven gear (24) meshing with the low gear drive gear (22). The transmission shaft (5) is connected to the high gear driven gear (23) or the low gear driven gear (24) through a high and low gear meshing sleeve or a synchronizer (25) to rotate synchronously.

6. An agricultural drive axle assembly according to claim 5, characterized in that: The constant mesh gear set includes a constant mesh gear (26) fixedly sleeved on a transmission shaft (3), and the high-gear drive gear (21) meshes with the constant mesh gear (26) for transmission.

7. The agricultural machine drive axle assembly of claim 1, wherein: The housing (1) is rotatably connected to a left output shaft (27) and a right output shaft (28) located on the same axis. The opposite ends of the left output shaft (27) and the right output shaft (28) extend outward from the housing (1) and are respectively connected to the left drive wheel (8) and the right drive wheel (9). The left half shaft and the right half shaft of the differential assembly (6) are rotatably connected to the housing (1) and are fitted with output drive gears (29). The opposite ends of the left output shaft (27) and the right output shaft (28) are fitted with output driven gears (30) that mesh with the corresponding side output drive gears (29).

8. The agricultural machinery drive axle assembly according to claim 1, characterized in that: The housing (1) is rotatably connected to a four-shaft drive shaft (31) and a four-wheel drive shaft (32). A drive gear (33) is fixedly mounted on the three-shaft drive shaft (5). A driven gear (34) meshing with the drive gear (33) is rotatably mounted on the four-shaft drive shaft (31). The four-shaft drive shaft (31) is connected to the driven gear (34) through a four-wheel drive engagement sleeve or a synchronizer (35) to achieve synchronous rotation of the three-shaft drive shaft (5) and the four-shaft drive shaft (31). The four-wheel drive shaft (32) is connected to the four-shaft drive shaft (31) and their axes are perpendicular to each other.

9. An agricultural machinery drive axle assembly according to claim 8, characterized in that: The four-wheel drive drive bevel gear (36) is fixedly mounted on the four-wheel drive shaft (31), and the inner end of the four-wheel drive drive shaft (32) is fixedly mounted with a four-wheel drive driven bevel gear (37) that meshes with the four-wheel drive drive bevel gear (36). The outer end of the four-wheel drive drive shaft (32) extends out of the housing (1) and is connected to the external rear drive mechanism for transmission.

10. An agricultural machinery drive axle assembly according to claim 1, characterized in that: One end of the transmission triaxial shaft (5) extends out of the housing (1) and is connected to a brake (38) that is fixedly engaged with the housing (1) or the outside.

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