Agricultural machinery electric drive drive axle assembly
Patent Information
- Application Number
- CN202521848437.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-28
- Publication Date
- 2026-08-21
- Estimated Expiration
- 2035-08-28
AI Technical Summary
[0002]农业机械(如拖拉机、收割机等)的驱动桥总成是其传动系统的核心部件，传统的农机驱动桥总成以内燃机为动力源，依赖复杂的机械式齿轮变速箱来实现变速和倒挡功能，其结构复杂、部件繁多，存在传动效率低、噪音大、排放污染以及维护成本高等固有缺点，同时，也不符合现代化新能源零排放、低噪音、高效率的工业需求
[0014] This utility model uses a power motor as a power source, which can achieve stepless speed change. In order to avoid the significant increase in the size, weight and cost of the power motor due to high torque demand, the mechanical transmission structure is integrated and optimized to reasonably amplify the output torque of the motor and expand the transmission speed ratio range, so as to meet the high torque output demand of low speed and heavy load. As a result, the overall structure of the drive axle assembly is compact, lightweight and low cost.
Smart Images
Figure CN224660406U_ABST
Abstract
Description
Technical fields:
[0001] This utility model belongs to the technical field of agricultural machinery transmission mechanism, and specifically refers to an agricultural machinery electric 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. Traditional agricultural machinery drive axle assemblies use internal combustion engines as the power source and rely on complex mechanical gearboxes to achieve speed change and reverse gear functions. They have complex structures and numerous components, and have inherent disadvantages such as low transmission efficiency, high noise, emissions pollution and high maintenance costs. At the same time, they do not meet the modern industrial requirements of zero emissions, low noise and high efficiency of new energy. Summary of the Invention:
[0003] The purpose of this utility model is to provide an agricultural machinery electric drive axle assembly that uses a power motor as a power source, can achieve stepless speed change, and through integrated and optimized mechanical transmission structure, reasonably amplifies the output torque of the motor and expands the transmission speed ratio range to meet the high torque output requirements of low speed and heavy load.
[0004] This utility model is implemented as follows:
[0005] An agricultural machinery electric 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. One end of the power input shaft extends out of the housing and is connected to the output end of a power motor. The power input shaft and the first transmission shaft, and the first transmission shaft and the second transmission shaft, are respectively connected by a set of constant mesh gears, and the total transmission ratio of the constant mesh gears is greater than 1. The second transmission shaft is connected to the third transmission shaft through a forward 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 drive wheel and the right drive wheel located outside the housing.
[0006] In the above-mentioned agricultural machinery electric drive axle assembly, the constant mesh gear set between the power input shaft and the transmission shaft includes a constant mesh driving gear fixedly sleeved on the power input shaft, and a constant mesh driven gear fixedly sleeved on the transmission shaft and meshing with the constant mesh driving gear.
[0007] In the above-mentioned agricultural machinery electric drive axle assembly, the constant mesh gear set between the first transmission shaft and the second transmission shaft includes a two-shaft constant mesh driving gear fixedly sleeved on the first transmission shaft, and a two-shaft constant mesh driven gear fixedly sleeved on the second transmission shaft and meshing with the two-shaft constant mesh driving gear.
[0008] In the aforementioned agricultural machinery electric drive axle assembly, the forward gear transmission component includes a first-gear drive gear and a second-gear drive gear fixedly mounted on the second transmission shaft, and a third-gear drive gear rotatably mounted on the second transmission shaft. A first-gear driven gear meshing with the first-gear drive gear and a second-gear driven gear meshing with the second-gear drive gear are rotatably mounted on the third transmission shaft. A third-gear driven gear meshing with the third-gear drive gear is fixedly mounted on the third transmission shaft. The third transmission shaft is engaged with the first-gear driven gear or the second-gear driven gear through a first- and second-gear engagement sleeve or a synchronizer to rotate synchronously. The second transmission shaft is engaged with the third-gear driven gear through a third-gear engagement sleeve or a synchronizer to rotate synchronously.
[0009] In the above-mentioned agricultural machinery electric 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.
[0010] In the above-mentioned agricultural machinery electric 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.
[0011] In the above-mentioned agricultural machinery electric drive axle assembly, a four-wheel drive active 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 active bevel gear is fixedly sleeved on the inner end of the four-wheel drive transmission shaft, and the outer end of the four-wheel drive transmission shaft extends out of the housing and is connected to the external rear drive mechanism for transmission.
[0012] In the above-mentioned agricultural machinery electric drive axle assembly, one end of the transmission three shafts extends out of the housing and is connected to a brake that is fixedly engaged with the housing or the outside.
[0013] The outstanding advantages of this utility model compared to the prior art are:
[0014] This utility model uses a power motor as a power source, which can achieve stepless speed change. In order to avoid the significant increase in the size, weight and cost of the power motor due to high torque demand, the mechanical transmission structure is integrated and optimized to reasonably amplify the output torque of the motor and expand the transmission speed ratio range, so as to meet the high torque output demand of low speed and heavy load. As a result, the overall structure of the drive axle assembly is compact, lightweight and low cost. Attached image description:
[0015] Figure 1 This is a simplified transmission diagram of the drive axle assembly of this utility model.
[0016] In the diagram: 1. Housing; 2. Power input shaft; 3. Drive shaft 1; 4. Drive shaft 2; 5. Drive shaft 3; 6. Power motor; 7. Differential assembly; 8. Central drive gear; 9. Left drive wheel; 10. Right drive wheel; 11. Constant mesh drive gear of shaft 1; 12. Constant mesh driven gear of shaft 1; 13. Constant mesh drive gear of shaft 2; 14. Constant mesh driven gear of shaft 2; 15. First gear drive gear; 16. Second gear drive gear; 17. Third gear drive gear; 18. First gear driven gear Gears; 19. Second gear driven gear; 20. Third gear driven gear; 21. First and second gear engagement sleeve or synchronizer; 22. Third gear engagement sleeve or synchronizer; 23. Left output shaft; 24. Right output shaft; 25. Output drive gear; 26. Output driven gear; 27. Four-wheel drive shaft; 28. Four-wheel drive drive shaft; 29. Transfer drive gear; 30. Transfer driven gear; 31. Four-wheel drive engagement sleeve or synchronizer; 32. Four-wheel drive drive bevel gear; 33. Four-wheel drive driven bevel gear; 34. Brake. Detailed implementation method:
[0017] The present invention will be further described below with reference to specific embodiments. See also: Figure 1 :
[0018] An agricultural machinery electric 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. One end of the power input shaft 2 extends out of the housing 1 and is connected to the output end of a power motor 6. The power input shaft 2 and the first transmission shaft 3, and the first transmission shaft 3 and the second transmission shaft 4 are respectively connected by a set of constant mesh gears, and the total transmission ratio of the constant mesh gears is greater than 1. The second transmission shaft 4 is connected to the third transmission shaft 5 through a forward gear transmission assembly. A central transmission gear 8 is fixedly fitted on the third transmission shaft 5 and meshes with the housing of a differential assembly 7. The left and right half-shafts of the differential assembly 7 are respectively connected to a left drive wheel 9 and a right drive wheel 10 located outside the housing 1.
[0019] This utility model uses a power motor 6 as a power source, which can realize stepless speed change. In order to avoid the significant increase in the size, weight and cost of the power motor 6 due to high torque demand, the mechanical transmission structure is integrated and optimized to reasonably amplify the output torque of the motor and expand the transmission speed ratio range, so as to meet the high torque output demand of low speed and heavy load. As a result, the overall structure of the drive axle assembly is compact, lightweight and low cost.
[0020] In order to stabilize transmission and effectively amplify the motor output torque under limited gear engagement, the constant mesh gear set between the power input shaft 2 and the transmission shaft 3 includes a primary constant mesh driving gear 11 fixedly mounted on the power input shaft 2, and a primary constant mesh driven gear 12 fixedly mounted on the transmission shaft 3, meshing with the primary constant mesh driving gear 11. The constant mesh gear set between the transmission shaft 3 and the transmission shaft 4 includes a secondary constant mesh driving gear 13 fixedly mounted on the transmission shaft 3, and a secondary constant mesh driven gear 14 fixedly mounted on the transmission shaft 4, meshing with the secondary constant mesh driving gear 13.
[0021] Meanwhile, the forward gear transmission assembly can have three or four gears in its power transmission path. In this embodiment, 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 15 and a second gear drive gear 16 fixedly mounted on the second transmission shaft 4, and a third gear drive gear 17 rotatably mounted on the second transmission shaft 4. A first gear driven gear 18 meshing with the first gear drive gear 15 and a second gear driven gear 19 meshing with the second gear drive gear 16 are rotatably mounted on the third transmission shaft 5. A third gear driven gear 20 meshing with the third gear drive gear 17 is fixedly mounted on the third transmission shaft 5. The third transmission shaft 5 is connected to the first gear driven gear 18 or the second gear driven gear 19 through a first- and second gear meshing sleeve or a synchronizer 21 to rotate synchronously. The second transmission shaft 4 is connected to the third gear driven gear 20 through a third gear meshing sleeve or a synchronizer 22 to rotate synchronously.
[0022] The transmission structure between the left and right half-shafts of the differential assembly 7 and the left drive wheel 9 and right drive wheel 10 is as follows: a left output shaft 23 and a right output shaft 24 located on the same axis are rotatably connected to the housing 1. The opposite ends of the left output shaft 23 and the right output shaft 24 extend outward from the housing 1 and are respectively connected to the left drive wheel 9 and the right drive wheel 10. The left and right half-shafts of the differential assembly 7 are rotatably connected to the housing 1 and are fitted with output drive gears 25. The opposite ends of the left output shaft 23 and the right output shaft 24 are fitted with output driven gears 26 that mesh with the corresponding output drive gears 25.
[0023] 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 27 and a four-wheel drive shaft 28 are rotatably connected to the housing 1. A drive gear 29 is fixedly mounted on the three-shaft drive shaft 5. A driven gear 30, meshing with the drive gear 29, is rotatably mounted on the four-shaft drive shaft 27. The four-shaft drive shaft 27 engages with the driven gear 30 via a four-wheel drive engagement sleeve or synchronizer 31 to achieve synchronous rotation between the three-shaft drive shaft 5 and the four-shaft drive shaft 27. The four-wheel drive shaft 28 is connected to the four-shaft drive shaft 27, and their axes are perpendicular. Furthermore, a four-wheel drive drive bevel gear 32 is fixedly mounted on the four-shaft drive shaft 27. A four-wheel drive driven bevel gear 33, meshing with the drive gear 32, is fixedly mounted on the inner end of the four-wheel drive shaft 28. The outer end of the four-wheel drive shaft 28 extends beyond the housing 1 and is connected to an external rear-drive mechanism.
[0024] 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 34 that is fixedly engaged with the housing 1 or the outside.
[0025] 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 machinery electric drive axle assembly, characterized in that: 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). One end of the power input shaft (2) extends out of the housing (1) and is connected to the output end of the power motor (6). The power input shaft (2) and the transmission shaft (3) are connected to each other and the transmission shaft (3) and the transmission shaft (4) are connected by a set of constant mesh gears. The total transmission ratio of the constant mesh gears is greater than 1. The transmission shaft (4) is connected to the transmission shaft (5) through a forward gear transmission assembly. The transmission shaft (5) is fixedly fitted with a central transmission gear (8) that meshes with the housing of the differential assembly (7). The left and right half shafts of the differential assembly (7) are connected to the left drive wheel (9) and the right drive wheel (10) located outside the housing (1), respectively.
2. The agricultural machinery electric drive axle assembly according to claim 1, characterized in that: The constant mesh gear set between the power input shaft (2) and the transmission shaft (3) includes a constant mesh driving gear (11) fixedly sleeved on the power input shaft (2), and a constant mesh driven gear (12) fixedly sleeved on the transmission shaft (3) and meshing with the constant mesh driving gear (11).
3. The agricultural machinery electric drive axle assembly according to claim 1, characterized in that: The constant mesh gear set between the transmission shaft 1 (3) and the transmission shaft 2 (4) includes a two-shaft constant mesh driving gear (13) fixedly sleeved on the transmission shaft 1 (3), and a two-shaft constant mesh driven gear (14) fixedly sleeved on the transmission shaft 2 (4) and meshing with the two-shaft constant mesh driving gear (13).
4. The agricultural machinery electric drive axle assembly according to claim 1, characterized in that: The forward gear transmission assembly includes a first gear drive gear (15) and a second gear drive gear (16) fixedly mounted on the second transmission shaft (4), and a third gear drive gear (17) rotatably mounted on the second transmission shaft (4). The third transmission shaft (5) is rotatably mounted with a first gear driven gear (18) meshing with the first gear drive gear (15) and a second gear driven gear (19) meshing with the second gear drive gear (16). The third transmission shaft (5) is fixedly mounted with a third gear driven gear (20) meshing with the third gear drive gear (17). The third transmission shaft (5) is connected to the first gear driven gear (18) or the second gear driven gear (19) through a first- and second gear meshing sleeve or a synchronizer (21) to rotate synchronously. The second transmission shaft (4) is connected to the third gear driven gear (20) through a third gear meshing sleeve or a synchronizer (22) to rotate synchronously.
5. The agricultural machinery electric drive axle assembly according to claim 1, characterized in that: The housing (1) is rotatably connected to a left output shaft (23) and a right output shaft (24) located on the same axis. The opposite ends of the left output shaft (23) and the right output shaft (24) extend outward from the housing (1) and are respectively connected to the left drive wheel (9) and the right drive wheel (10). The left half shaft and the right half shaft of the differential assembly (7) are rotatably connected to the housing (1) and are fitted with output drive gears (25). The opposite ends of the left output shaft (23) and the right output shaft (24) are fitted with output driven gears (26) that mesh with the corresponding side output drive gears (25).
6. The agricultural machinery electric drive axle assembly according to claim 1, characterized in that: The housing (1) is rotatably connected to a four-shaft drive shaft (27) and a four-wheel drive shaft (28). A drive gear (29) is fixedly mounted on the three-shaft drive shaft (5). A driven gear (30) meshing with the drive gear (29) is rotatably mounted on the four-shaft drive shaft (27). The four-shaft drive shaft (27) is connected to the driven gear (30) through a four-wheel drive engagement sleeve or a synchronizer (31) to achieve synchronous rotation of the three-shaft drive shaft (5) and the four-shaft drive shaft (27). The four-wheel drive shaft (28) is connected to the four-shaft drive shaft (27) and their axes are perpendicular to each other.
7. The agricultural machinery electric drive axle assembly according to claim 6, characterized in that: The four-wheel drive drive bevel gear (32) is fixedly mounted on the four-wheel drive shaft (27), and the inner end of the four-wheel drive drive shaft (28) is fixedly mounted with a four-wheel drive driven bevel gear (33) that meshes with the four-wheel drive drive bevel gear (32). The outer end of the four-wheel drive drive shaft (28) extends out of the housing (1) and is connected to the external rear drive mechanism for transmission.
8. The agricultural machinery electric 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 (34) that is fixedly engaged with the housing (1) or the outside.