A grain harvesting header drive

Abstract

The utility model relates to a kind of grain harvesting header transmission device, belong to agricultural machinery technical field.The technical scheme is: bevel gear seven both ends are connected with transfer case main shaft, power transmission is given to the transfer case of transmission case left and right sides, and the transfer case of left and right sides drives ear picking device to carry out ear picking operation;Bevel gear five is connected with the left end of first transmission shaft, the right end of first transmission shaft is connected with the left end of second transmission shaft through coupling, the right end of second transmission shaft is connected with driving sprocket, driving sprocket is engaged with auger sprocket through chain, auger sprocket is connected with right auger, drives auger operation;Left transmission mechanism drives left auger operation, left auger and right auger simultaneously drive middle auger operation.The left and right two sets of transmission mechanism of the utility model are symmetrically arranged on the both sides of header frame axis, and the mode that power is efficiently transmitted to header transfer case and two sides auger for harvesting operation is achieved by centralized transmission, and the operation safety and efficiency are improved.

Description

Technical Field

[0001] This utility model relates to a grain harvesting header transmission device, belonging to the field of agricultural machinery technology. Background Technology

[0002] Grain harvesting machinery refers to the general term for machinery used to harvest the grains and straw of cereal crops such as rice and wheat. It involves cutting down the stalks of crops like rice and wheat and laying them out in the field. Based on the type of header, it is divided into horizontal and vertical types. Vertical header harvesters lay the cut crop upright on the cutter plane, close to the conveyor, and are laid out in strips outside the output machine. They are compact, lightweight, flexible, and easy to operate, making them suitable for harvesting rice and wheat on small plots of land. As the core equipment of mechanized grain harvesting, the performance of the grain header harvester directly affects harvesting efficiency, straw processing quality, and equipment reliability. In the overall structure of the header, the transmission device bears the heavy responsibility of transmitting power to key actuators such as ear picking, stalk pulling, conveying, and chopping, and is a crucial guarantee for the realization of the machine's functions. The rapid development of large-scale grain planting has placed higher demands on the width and convenience of harvester headers. Folding headers can increase both the width and convenience of the header, as exemplified by Chinese patent applications CN 202122092557.0 ("Folding Silage Header Frame, Folding Silage Header, and Harvester") and CN202022228285.8 ("A Quick-Disassembly Foldable Header"), where the header and auger employ a two- or three-section folding mechanism. However, existing grain harvester headers typically rely on a single power unit to transmit power to both sides of the header for operation, making them ill-suited for folding headers. This results in low harvesting safety and efficiency, high failure rates, difficult maintenance, and high costs. Utility Model Content

[0003] The purpose of this utility model is to provide a grain harvesting header transmission device, in which two sets of transmission mechanisms are symmetrically arranged on both sides of the header frame axis. Through centralized transmission, power is efficiently transmitted to the header transfer box and the two side augers for harvesting operations, thereby improving operational safety and efficiency, enhancing equipment reliability and ease of maintenance, reducing overall costs, and solving the aforementioned technical problems existing in the prior art.

[0004] The technical solution of this utility model is: A grain harvesting header transmission device includes a central auger, a left auger, and a right auger mounted on a header frame. The two end drive shafts of the central auger are connected to the drive shafts of the left and right augers, respectively. The central auger is foldable from the left and right augers. Left and right transmission mechanisms are symmetrically arranged on both sides of the header frame axis. These mechanisms have identical structures and are respectively mounted on the header frame near the left and right augers at both ends of the central auger. The right transmission mechanism includes a gearbox, a cross shaft, a gearbox, and a transmission housing. The gearbox transmits power to the gearbox via the cross shaft. The upper end of the cross shaft's input shaft two external spline engages with the driven bevel gear one of the gearbox, and the lower end of the cross shaft engages with the input shaft three external spline of the gearbox. Inside the gearbox, the driven bevel gear two meshes with the driving bevel gear two. The input shaft three connects to the driven bevel gear two, and the driving bevel gear two connects to the output shaft, transmitting power to the transmission housing via the output shaft. The input shaft of the transmission box is connected to the output shaft of the gearbox. Helical gear 1 and helical gear 2 of the transmission box are both connected by external splines on the input shaft 4. Helical gear 1 is connected to helical gear 3, helical gear 2 is connected to helical gear 4, and helical gear 3 and helical gear 4 are connected by an intermediate shaft. Helical gear 5 is connected to helical gear 6, and helical gear 6 is connected to helical gear 7. Both ends of helical gear 7 are connected to the main shaft of the transfer case, transmitting power to the transfer cases on the left and right sides of the transmission box. The transfer cases on the left and right sides drive the ear-picking device to perform ear-picking operations. Helical gear 5 is connected to the left end of the first transmission shaft. The right end of the first transmission shaft is connected to the left end of the second transmission shaft through a coupling. The right end of the second transmission shaft is connected to the drive sprocket. The drive sprocket is connected to the auger sprocket through a chain. The auger sprocket is connected to the right auger, driving the auger to operate. The left transmission mechanism drives the left auger to operate, and the left and right augers simultaneously drive the middle auger to operate.

[0005] Furthermore, the right end of the first drive shaft is connected to one end of the coupling via a self-aligning roller bearing and a coupling spring, and the other end of the coupling is connected to the left end of the second drive shaft. The coupling is a gear coupling. The first and second drive shafts form a foldable structure, which is convenient to fold simultaneously with the auger and can transmit power during the flattening operation of the cutting table.

[0006] Furthermore, the bottom of the gearbox is connected to the base plate by bolts, the base plate is fixed to the gearbox crossbeam, and the gearbox crossbeam is fixedly connected to the cutting table frame.

[0007] Furthermore, a clutch is provided between the first helical gear and the second helical gear. A shift fork plate is provided on the fourth input shaft. The shift fork plate is connected to the shift fork guide sleeve. Under the action of the shift fork guide sleeve, the shift fork plate slides along the fourth input shaft and matches the clutch. The shift fork plate actuates the clutch to contact and rotate the first or second helical gear. By using the shift fork plate to control the clutch, the transmission ratio of the first and second helical gears is changed during the operation of the cutter head, realizing speed change. High and low speeds are selected according to the actual harvesting conditions, and then the power is output to the transfer case.

[0008] The positive effects of this utility model are as follows: The two sets of transmission mechanisms are symmetrically arranged on both sides of the header frame axis. Through centralized transmission, the power is efficiently transmitted to the header transfer box and the two augers on both sides for harvesting operations, which improves the safety and efficiency of the operation, improves the reliability and ease of maintenance of the equipment, and reduces the overall cost. Attached Figure Description

[0009] Figure 1 This is a rear view of the overall structure of an embodiment of the present utility model; Figure 2 This is a front view of the transmission device structure on the right side of an embodiment of this utility model; Figure 3 This is a front view of the internal structure of an embodiment of the present utility model; Figure 4 This is an embodiment of the present utility model. Figure 3 A magnified structural diagram of A in the middle; Figure 5 This is an embodiment of the present utility model. Figure 2 A magnified structural diagram of B in the diagram; Figure 6 This is a schematic diagram of the coupling structure according to an embodiment of the present utility model; In the diagram: 1-Cutter frame, 2-Gearbox base, 3-Gearbox beam, 4-Gearbox, 5-Cross shaft, 6-Gearbox, 7-Transmission box, 8-Transfer box, 9-Self-aligning roller bearing 1, 10-Drive bevel gear 1, 11-Input shaft 1, 12-Driven bevel gear 1, 13-Input shaft 2, 14-Input shaft 3, 15-Driven bevel gear 2, 16-Driven bevel gear 2, 17-Output shaft, 18-Tapered roller bearing, 19-Helical gear 1, 20-Helical gear 2, 21- Input shaft four, 22-shift fork guide sleeve, 23-shift fork plate, 24-clutch, 25-helical gear three, 26-helical gear four, 27-intermediate shaft, 28-helical gear five, 29-helical gear six, 30-helical gear seven, 31-transfer box main shaft, 32-first drive shaft, 33-second drive shaft, 34-self-aligning roller bearing two, 35-coupling spring, 36-coupling, 37-auger sprocket, 38-auger sprocket, 40-intermediate auger, 41-left auger, 42-right auger. Detailed Implementation

[0010] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0011] See attached document Figure 1-6 A grain harvesting header transmission device includes a central auger 40, a left auger 41, and a right auger 42 mounted on a header frame 1. The drive shafts at both ends of the central auger 40 are connected to the drive shafts of the left auger 41 and the right auger 42, respectively. The central auger 40 is foldable relative to the left and right augers 41 and 42. Left and right transmission mechanisms are symmetrically arranged on both sides of the header frame 1 along its axis. These mechanisms have identical symmetrical structures and are respectively mounted on the header frame 1 at both ends of the central auger 40, near the left and right augers 41 and 42. The right transmission mechanism includes a gearbox 4, a cross shaft 5, and a gearbox 6. The gearbox 4 transmits power to the transmission 6 via a cross shaft 5. The upper end of the cross shaft 5, input shaft 2 13, is externally splined and meshes with the driven bevel gear 12 of the gearbox. The lower end of the cross shaft 5 is externally splined and meshes with the input shaft 3 14 of the transmission. Inside the transmission 6, driven bevel gear 2 15 meshes with driving bevel gear 2 16. Input shaft 3 14 is connected to driven bevel gear 2 15, and driving bevel gear 2 16 is connected to output shaft 17, transmitting power to the gearbox 7 via output shaft 17. The input shaft 4 21 of the gearbox 7 is connected to the output shaft 17 of the transmission 6, thus transmitting power... Helical gear 19 and helical gear 20 of gearbox 7 are both connected by external splines through input shaft 4 21. Input shaft 4 21 is equipped with tapered roller bearings 18. Helical gear 19 meshes with helical gear 3 25, and helical gear 20 meshes with helical gear 4 26. Helical gear 3 25 and helical gear 4 26 are connected by intermediate shaft 27. Helical gear 5 28 meshes with helical gear 6 29. Helical gear 6 29 meshes with helical gear 7 30. Both ends of helical gear 7 30 are connected to the transfer case main shaft 31, transmitting power to the transfer cases 8 on the left and right sides of gearbox 7. The transfer cases 8 on the left and right sides drive... The ear-picking device performs ear-picking operations; the helical gear 28 is connected to the left end of the first transmission shaft 32, and the right end of the first transmission shaft 32 is connected to the left end of the second transmission shaft 33 through the coupling 36. The second transmission shaft 33 is provided with a self-aligning roller bearing 9 in the middle, and the right end of the second transmission shaft 33 is connected to the drive sprocket 37. The drive sprocket 37 is engaged with the auger sprocket 38 through the chain 39. The auger sprocket 38 is connected to the right auger 42, driving the auger 42 to operate; the left transmission mechanism drives the left auger 41 to operate, and the left auger 41 and the right auger 42 simultaneously drive the middle auger 40 to operate.

[0012] See attached document Figure 5The right end of the first drive shaft 32 is connected to one end of the coupling 36 via a self-aligning roller bearing 34 and a coupling spring 35. The other end of the coupling 36 is connected to the left end of the second drive shaft 33. The coupling 36 is a gear coupling. The first drive shaft 32 and the second drive shaft 33 form a foldable structure, which is convenient to fold at the same time as the auger and can transmit power when the cutting table is flattened.

[0013] Preferably, the coupling 36 is a drum-shaped gear coupling.

[0014] The gear coupling uses the meshing of internal and external teeth to transmit torque and rotational motion between the two halves of the coupling. It is suitable for transmission shaft systems that connect two concentric shafts and has a certain ability to compensate for the relative displacement of the two shafts. It is a well-known and commonly used mechanism in this field.

[0015] See attached document Figure 2 The bottom of the gearbox 4 is connected to the base plate 2 by bolts. The base plate 2 is fixed on the gearbox crossbeam 3, and the gearbox crossbeam 3 is fixedly connected to the cutting table frame 1.

[0016] See attached document Figure 4 A clutch 24 is provided between the helical gear 19 and the helical gear 20. A shift fork plate 23 is provided on the input shaft 21. The shift fork plate 23 is connected to the shift fork guide sleeve 22. Under the action of the shift fork guide sleeve 22, the shift fork plate 23 slides along the input shaft 21 and matches the clutch 24. The shift fork plate 23 actuates the clutch 24 to contact and rotate the helical gear 19 or the helical gear 20. The shift fork plate 23 controls the clutch 24, so that the cutting table changes the transmission ratio of the helical gear 19 and the helical gear 20 during operation, realizing speed change. High and low speeds are selected according to the actual harvesting conditions, and then the power is output to the transfer case 8.

[0017] During operation, the transmission mechanisms on both sides of the grain harvesting header transmission device of this utility model work simultaneously. Power is transmitted to the gearbox 4 through the input shaft 11. The gearbox 4 transmits power to the gearbox 6 and the transmission box 7 through the cross shaft 5. Then, the transmission box 7 drives the transfer case 8 to work. At the same time, the transmission box 7 drives the auger sprocket 38 to rotate through the second transmission shaft 33, thereby driving the auger to rotate and the header to work.

[0018] The gearboxes of the transmission mechanisms on the left and right sides serve as the input end of the total power. They are symmetrically arranged on the auger in the middle of the cutting table, and transmit the power to the transmission box 7 through the cross shaft 5. The transmission box 7 then transmits the power to the transfer box 8 and the second transmission shaft 33, which drive the auger to rotate through chain drive.

[0019] Appendix Figure 5This diagram illustrates the connection between the first drive shaft 32 and the second drive shaft 33, showing the extended state. The drive shafts connecting the two ends of the intermediate auger 40 to the left auger 41 and right auger 42 respectively also employ the aforementioned foldable structure, allowing the augers to be extended or folded. When extended, they can transmit power. The folding positions of the intermediate auger 40 with the left and right augers 41 and 42 correspond to the folding positions between the first drive shaft 32 and the second drive shaft 33 of the left and right transmission mechanisms, facilitating folding of the cutting table.

[0020] This utility model outputs power to the transfer case via the transmission box and transmits power axially on both sides. When the cutting table is flattened, the coupling transmits power, making the power transmission efficiency more efficient and greatly reducing power loss. Moreover, the transmission structure is simpler, transportation is convenient, manufacturing costs are saved, and maintenance time is greatly shortened.

Claims

1. A grain harvesting header transmission device, characterized in that: The machine includes a central auger (40), a left auger (41), and a right auger (42) mounted on a cutting table frame (1). The drive shafts at both ends of the central auger (40) are connected to the drive shafts of the left auger (41) and the right auger (42) respectively. The central auger (40) is foldable with respect to the left auger (41) and the right auger (42). The cutting table frame (1) is symmetrically equipped with left and right transmission mechanisms on both sides of its axis. The left and right transmission mechanisms have symmetrical and identical structures and are respectively mounted on the cutting table frame (1) at both ends of the central auger (40) near the left auger (41) and the right auger (42). The right transmission mechanism includes a gearbox (4), a cross shaft (5), a gearbox (6), and a transmission mechanism. The gearbox (7) transmits power to the gearbox (6) via a cross shaft (5). The external spline of the input shaft 2 (13) at the upper end of the cross shaft (5) meshes with the driven bevel gear 1 (12) of the gearbox, and the lower end of the cross shaft (5) meshes with the external spline of the input shaft 3 (14) of the gearbox (6). The driven bevel gear 2 (15) inside the gearbox (6) meshes with the driving bevel gear 2 (16). The input shaft 3 (14) is connected to the driven bevel gear 2 (15), and the driving bevel gear 2 (16) is connected to the output shaft (17). Power is transmitted to the transmission box (7) via the output shaft (17). The input shaft 4 (21) of the transmission box (7) is connected to the gearbox (6). The output shaft (17) of the gearbox (6) is connected. The helical gear 1 (19) and helical gear 2 (20) of the transmission box (7) are both connected by the external spline of the input shaft 4 (21). The helical gear 1 (19) is connected by the helical gear 3 (25), the helical gear 2 (20) is connected by the helical gear 4 (26), and the helical gear 3 (25) and the helical gear 4 (26) are connected by the intermediate shaft (27). The helical gear 5 (28) is connected by the helical gear 6 (29), and the helical gear 6 (29) is connected by the helical gear 7 (30). The two ends of the helical gear 7 (30) are connected to the main shaft (31) of the transfer case, which transmits power to the transfer cases on the left and right sides of the transmission box (7). (8) The transfer cases (8) on the left and right sides drive the ear-picking device to perform ear-picking operations; the helical gear five (28) is connected to the left end of the first transmission shaft (32), the right end of the first transmission shaft (32) is connected to the left end of the second transmission shaft (33) through the coupling (36), the right end of the second transmission shaft (33) is connected to the drive sprocket (37), the drive sprocket (37) is meshed with the auger sprocket (38) through the chain, the auger sprocket (38) is connected to the right auger (42), and drives the right auger (42) to work; the left transmission mechanism drives the left auger (41) to work, and the left auger (41) and the right auger (42) simultaneously drive the middle auger (40) to work.

2. The grain harvesting header transmission device according to claim 1, characterized in that: The right end of the first drive shaft (32) is connected to one end of the coupling (36) via a self-aligning roller bearing (34) and a coupling spring (35). The other end of the coupling (36) is connected to the left end of the second drive shaft (33). The coupling (36) is a gear coupling. The first drive shaft (32) and the second drive shaft (33) form a foldable structure.

3. A grain harvesting header transmission device according to claim 1 or 2, characterized in that: The bottom of the gearbox (4) is connected to the base plate (2) by bolts. The base plate (2) is fixed on the gearbox crossbeam (3). The gearbox crossbeam (3) is fixedly connected to the cutting table frame (1).

4. The grain harvesting header transmission device according to claim 3, characterized in that: A clutch (24) is provided between the first helical gear (19) or the second helical gear (20). A shift fork plate (23) is provided on the fourth input shaft (21). The shift fork plate (23) is connected to the shift fork guide sleeve (22). Under the action of the shift fork guide sleeve (22), the shift fork plate (23) slides along the fourth input shaft (21) and matches the clutch (24). The shift fork plate (23) moves the clutch (24) to contact and rotate with the first helical gear (19) or the second helical gear (20).

Images