Clamping type feeding device for sunflower combine harvester

Abstract

The utility model discloses a clamping type feeding device for a sunflower combine harvester. The clamping type feeding device structurally comprises a transmission mechanism, a harrow chain mechanism, a harrow chain angle adjusting mechanism, a lower conveying belt mechanism and a lower conveying belt tensioning adjusting mechanism. According to the device, the principle that the rake chain and the lower conveying belt synchronously move upwards and clamp is utilized, the rake chain is installed on the upper portion, the lower conveying belt is installed on the lower portion in parallel, the rake chain and the lower conveying belt support to stably convey sunflower discs to a threshing mechanism, it is guaranteed that when the sunflower discs move upwards, the sunflower discs are prevented from rolling down randomly, and accumulation or rubbing is caused; the seeds are removed, and the skin is scraped; in addition, a rake chain angle adjusting mechanism is arranged at the rake chain and the material inlet end of the lower conveying belt, the tension degree of the rake chain can be adjusted, the width of the inlet end can be adjusted, and therefore the machine can adapt to different feeding quantities, threshing quality is improved, sunflower seed skin damage is reduced, and the rate of finished products is increased.

Description

Technical Field

[0001] The utility model relates to a sunflower harvesting machine, in particular to a clamping feeding device for a sunflower combine harvester. Background Art

[0002] In recent years, the agricultural sector has imposed strict requirements on mechanized harvesting of edible sunflowers, including shortening the harvest period, ensuring the kernels are free of scratches and impurities, collecting the sunflower heads for feed, and shredding the straw for return to the field. However, manual harvesting is still the main method in most areas, while some regions have adopted mechanized harvesting and segmented harvesting. Segmented harvesting involves manually cutting the sunflower heads, then inserting them into the stubble of the stems to dry in the sun. After drying, the sunflowers are harvested and threshed using a harvester. Currently, the focus is on mechanized harvesting of oilseed sunflowers, while the mechanized harvesting of edible sunflowers is still in its infancy. Although research and production departments have developed and produced products for many years, the technology is still immature, with the following major issues: high sunflower seed loss. Since sunflower harvesters are often modified wheat combine harvesters for direct harvesting, measurements have shown that the total sunflower seed loss rate exceeds 10%. This includes losses at every stage of the threshing process, including the header, feeding the heads, threshing, screening, and winnowing. Moreover, the sunflower disk feeding device still adopts a conveyor belt composed of a conveyor chain and a conveyor tooth plate, or a canvas belt fixed conveyor partition structure. In the process of conveying the sunflower disk upward, the sunflower disk is prone to fall or roll downward, causing the sunflower disks to accumulate and collide and rub against each other. On the one hand, the skin of the sunflower seeds is worn and scratched, and on the other hand, the uneven feeding of the roller will also result in incomplete threshing. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a clamping feeding device for a sunflower combine harvester, which can ensure that the sunflower disc enters the feeding device from the outlet of the cutting platform conveying auger, moves upward, does not roll, does not accumulate, and enters the threshing drum smoothly.

[0004] The technical problem to be solved by the utility model is achieved by the following structure: a clamping feeding device for a sunflower combine harvester is installed behind the harvesting platform of the sunflower combine harvester and in front of a threshing mechanism, and its function is to transport the harvested sunflower discs to the threshing mechanism for threshing.

[0005] The clamping feeding device consists of a feeding device side plate, a large pulley, a small pulley II, a bridge gear, a rake chain mechanism, a lower conveyor belt mechanism, a lower conveyor belt adjustment mechanism, a rake chain angle adjustment mechanism, a lower conveyor belt supporting wheel, a transmission mechanism, and a bridge gear tensioning adjustment mechanism.

[0006] The transmission mechanism consists of a large pulley, a small pulley II, a bridge gear, a bridge drive belt, a rake chain drive gear, and a rake chain drive chain. The large pulley receives power from the conveyor roller pulley via the drive belt, then transmits the power to the coaxial small pulley I. The small pulley I then transmits the power to the small pulley II via the bridge drive belt. The small pulley II transmits the power to the coaxial bridge gear via the bridge drive shaft. The bridge gear transmits the power to the rake chain drive gear via the rake chain drive chain, driving the rake chain mechanism. The rake chain drive sprocket transmits the power to the coaxial intermediate transition gear I. The intermediate transition gear I meshes with the intermediate transition gear III, transmitting the power to the intermediate transition gear III and changing its direction of rotation. The intermediate transition gear III drives the coaxial intermediate transition gear II, which transmits the power to the lower conveyor roller drive sprocket via the lower conveyor roller drive chain, ultimately driving the lower conveyor belt mechanism.

[0007] The rake chain mechanism, located in the upper portion of the clamping feeding device, consists of a rake chain drive roller, a rake chain drive roller, a rake chain drive roller bearing, an octagonal rake chain gear, a rake chain, a rake chain driven roller, a rake chain driven roller, and a rake chain driven roller bearing. Its function is to transport the sunflower heads to the threshing drum. The rake chain mechanism, via the rake chain drive roller, the rake chain drive roller bearing, the rake chain driven roller, and the rake chain driven roller bearing, is mounted on the side panels of the feeding device. The octagonal rake chain gear fits over the rake chain drive roller shaft, and the rake chain loops around the octagonal rake chain gear and the rake chain driven roller. The octagonal rake chain gear receives power from the rake chain drive gear to drive the rake chain.

[0008] The rake chain consists of a transmission belt, connecting bolts and nuts, and rake rods. The rake rods are vertically fixed between the two transmission belts by connecting bolts and nuts. The center distance between the rake rods is 45mm to 55mm. The rake rods are made of high-carbon steel and manganese steel, with a diameter of 10mm to 15mm. The rake chain's octagonal gears move the rake rods, driving the rake chain.

[0009] The lower conveyor belt mechanism consists of lower conveyor roller I, lower conveyor roller I shaft, lower conveyor roller I shaft bearing, lower conveyor belt, lower conveyor roller II, lower conveyor roller II shaft, and lower conveyor roller II shaft bearing. The lower conveyor belt mechanism, via lower conveyor roller I shaft, lower conveyor roller II shaft, lower conveyor roller I shaft bearing, and lower conveyor roller II shaft bearing, is mounted on the side panel of the feeding device, located below the rake chain mechanism. The lower conveyor belt and rake chain work together to support the sunflower discs as they are conveyed toward the threshing drum, preventing them from rolling and accumulating during transport and ensuring they are evenly and smoothly conveyed upward. The lower conveyor belt is made of a rubber belt with a embossed surface to reduce surface roughness and prevent the discs from sliding down.

[0010] The rake chain is parallel to the lower conveyor belt, and both have the same linear speed. The distance between the rake chain, rake bar, and lower conveyor belt is 60mm to 80mm. To accommodate local sunflower production and ensure a steady and uniform feed rate, the distance between the rake bar and lower conveyor belt at the sunflower inlet is adjustable. The inlet width can be adjusted to 60mm to 110mm using the rake chain angle adjustment mechanism.

[0011] The rake chain angle adjustment mechanism includes a rake chain angle adjustment mechanism fixing bolt, a connecting plate, a fixed support plate, a tightening bolt, a tension adjustment bolt, a movable bracket, a sector plate, and a rake chain driven roller bearing. The rake chain angle adjustment mechanism serves two functions: first, it adjusts the tension of the rake chain; second, it adjusts the width of the material inlet between the rake chain and the lower conveyor belt. One end of the rake chain angle adjustment mechanism is fixed to the feeder side panel via the rake chain angle adjustment mechanism fixing bolt, while the other end is connected to the rake chain driven roller bearing via the sector plate. One end of the connecting plate is connected to the rake chain angle adjustment mechanism fixing bolt, and the other end is connected to the movable bracket. A straight groove is machined into the connecting plate, and the movable bracket can be extended and retracted along the groove via the tightening bolt. The fixed support plate is welded to the connecting plate, with a tension adjustment bolt and a lock nut installed between the fixed support plate and the movable bracket. The movable bracket is welded to the sector plate. The small end of the sector plate is fixed to the feeder side panel via a tightening bolt, together with the movable bracket, allowing the sector plate to swing left and right around the tightening bolt. The large end of the sector plate is fitted with a bearing for the rake chain's driven roller. The corresponding side plate of the rake chain's driven roller feed mechanism features an arc-shaped slot, allowing the rake chain's driven roller to move up and down. Therefore, to adjust the rake chain's tension, the tensioning adjustment bolt and lock nut are adjusted to change the distance between the movable bracket and the fixed support plate, thereby pulling the sector plate and rake chain's driven roller forward and backward. To adjust the width of the material inlet between the rake chain and the lower conveyor belt, the bolts at the small end of the sector plate are loosened, and the position of the rake chain's driven roller at the material inlet is swung up and down to adjust the desired inlet width.

[0012] The lower conveyor belt tensioning mechanism consists of a connecting base, lower conveyor belt tensioning bolts, a fixed plate, a tensioning nut, a movable base, movable base fastening bolts and nuts, and a lower conveyor roller shaft connection plate. The lower conveyor belt tensioning mechanism adjusts the tension of the lower conveyor belt to ensure a certain grip between the lower conveyor belt and the rake chain. The lower conveyor belt tensioning mechanism is mounted on the feeder unit side plate via the connecting base, with the other end connected to the lower conveyor roller shaft via the lower conveyor roller shaft connection plate. The fixed plate is welded to the connecting base, while the movable base faces it and is secured within a slot in the feeder unit side plate via the movable base fastening bolts and nuts. The lower conveyor belt tensioning bolts and nuts are installed between the fixed plate and the movable base. Adjustment is accomplished by first loosening the movable base fastening bolts and nuts. Then, by adjusting the lower conveyor belt tensioning bolts and nuts, the movable base, the lower conveyor roller shaft connection plate, and the lower conveyor roller shaft are pulled forward and backward to adjust the tension of the lower conveyor belt.

[0013] The advantages of this clamping feeding device for sunflower combine harvesters are: 1. This device utilizes the principle of synchronous upward movement and clamping of the rake chain and the lower conveyor belt to ensure that the sunflower disks do not roll downward arbitrarily when running upward, causing the sunflower disks to pile up or collide and rub against each other, causing the grains to fall off and the skin to be scratched; 2. A rake chain angle adjustment mechanism is installed at the material inlet end of the rake chain and the lower conveyor belt, which can adjust the inlet end width to adapt to the feeding amount and reduce the occurrence of sunflower disk accumulation; 3. This clamping feeding mechanism has a simple structure and can be installed on different harvesters with a little modification, thereby improving the utilization rate of the machine and the threshing product rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the location of the clamping feeding device for the sunflower combine harvester.

[0015] Figure 2 This is the front view of the clamping feeding device for sunflower combine harvester

[0016] Figure 3 A top view of the clamping feeding device for a sunflower combine harvester

[0017] Figure 4 Side view of the clamping feeding device for sunflower combine harvester

[0018] Figure 5 yes Figure 3 Middle AA section view

[0019] Figure 6 yes Figure 5 Partial view of middle B

[0020] Figure 7 yes Figure 6 Middle C-direction view

[0021] Figure 8 yes Figure 2 Schematic diagram of the middle part

[0022] Figure 9 yes Figure 8 Middle D direction view

[0023] The arrow in the figure indicates the direction of rotation of the mechanism

[0024] Legend

[0025] 1. Sunflower combine harvester 2. Threshing mechanism 3. Harvesting platform 4. Conveyor roller pulley 5. Clamping feeder 6. Large pulley 7. Feeder side plate 8. Small pulley II 9. Bridge gear 10. Harrow chain mechanism 11. Harrow chain angle adjustment mechanism 12. Lower conveyor belt mechanism 13. Lower conveyor belt tensioning adjustment mechanism 14. Lower conveyor belt supporting roller 15. Lower conveyor roller drive chain 16. Lower conveyor roller drive sprocket 17. Harrow chain drive gear 18. Intermediate transition gear I 19. Intermediate transition gear III 20. Harrow chain drive chain 21. Small pulley I 22. Intermediate transition gear II 23. Bridge drive shaft 24. Bridge drive belt 25. Bridge gear tensioning adjustment mechanism 26. Transmission mechanism

[0026] 10-1 rake chain octagonal gear 10-2 rake chain drive roller 10-3 rake chain drive roller shaft 10-4 rake chain drive roller shaft bearing 10-5 rake chain 10-6 rake chain driven roller shaft 10-7 rake chain driven roller 10-8 rake chain driven roller shaft bearing

[0027] 11-1 Rake chain angle adjustment mechanism fixing bolt 11-2 Connecting plate 11-3 Fixed support plate 11-4 Fastening bolt 11-5 Tensioning adjustment bolt 11-6 Locking nut 11-7 Movable bracket 11-8 Sector plate

[0028] 12-1 Lower conveyor roller I 12-2 Lower conveyor roller I shaft 12-3 Lower conveyor roller I shaft bearing 12-4 Lower conveyor belt 12-5 Lower conveyor roller II 12-6 Lower conveyor roller II shaft 12-7 Lower conveyor roller II shaft bearing

[0029] 13-1 Connecting base plate 13-2 Lower conveyor belt tensioning adjustment bolt 13-3 Fixed plate 13-4 Tensioning adjustment nut 13-5 Movable base plate 13-6 Movable base plate fastening bolts and nuts 13-7 Lower conveyor roller II shaft connecting plate

[0030] 10-5-1 Conveyor belt 10-5-2 Connecting bolts and nuts 10-5-3 Rake rod The arrow in the figure shows the direction of rotation of the mechanism DETAILED DESCRIPTION

[0031] In order to more clearly illustrate the technical solution of the present invention, the clamping feeding device for a sunflower combine harvester is described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the device can be more easily understood by those skilled in the art, thereby making a clearer definition of the protection scope of the present invention.

[0032] like Figure 1 As shown, the clamping feeding device 5 is installed behind the harvesting platform 3 of the sunflower combine harvester 1 and in front of the threshing mechanism 2.

[0033] The clamping feeding device 5 is composed of a feeding device side plate 7, a large pulley 6, a small pulley II 8, a bridge gear 9, a rake chain mechanism 10, a lower conveyor belt mechanism 12, a lower conveyor belt tensioning adjustment mechanism 13, a rake chain angle adjustment mechanism 11, a lower conveyor belt supporting wheel 14, a transmission mechanism 26, and a bridge gear tensioning adjustment mechanism 25.

[0034] like Figure 2 、 Figure 3 、 Figure 4 As shown, the transmission mechanism 26 is composed of a large pulley 6, a small pulley II 8, a bridge gear 9, a bridge transmission belt 24, a rake chain drive gear 17, and a rake chain drive chain 20. The large pulley 6 obtains power from the conveyor drum pulley 4 through a transmission belt, and then transmits power to a coaxial small pulley Ⅰ21 therewith. The small pulley Ⅰ21 transmits power to the small pulley Ⅱ8 through the bridge drive belt 24. The small pulley Ⅱ8 transmits power to the coaxial bridge gear 9 through the bridge drive shaft 23. The bridge gear 9 transmits power to the rake chain drive gear 17 through the rake chain drive chain 20, driving the rake chain mechanism 10 to operate; the rake chain drive gear 17 transmits power to the coaxial intermediate transition gear Ⅰ18, the intermediate transition gear Ⅰ18 meshes with the intermediate transition gear Ⅲ19, transmits power to the intermediate transition gear Ⅲ19 and changes the direction of rotation, the intermediate transition gear Ⅲ19 drives the coaxial intermediate transition gear Ⅱ22, the intermediate transition gear Ⅱ22 transmits power to the lower conveyor roller drive sprocket 16 through the lower conveyor roller drive chain 15, and finally drives the lower conveyor belt mechanism 12 to operate.

[0035] like Figure 5As shown, the rake chain mechanism 10 is located in the upper portion of the clamping feeding device 5 and comprises a rake chain drive roller 10-2, a rake chain drive roller shaft 10-3, a rake chain drive roller shaft bearing 10-4, a rake chain octagonal gear 10-1, a rake chain 10-5, a rake chain driven roller shaft 10-6, a rake chain driven roller 10-7, and a rake chain driven roller shaft bearing 10-8. The rake chain mechanism 10 is mounted on the feeding device side plate 7 via the rake chain drive roller shaft 10-3, the rake chain drive roller shaft bearing 10-4, the rake chain driven roller shaft 10-6, and the rake chain driven roller shaft bearing 10-8. The rake chain octagonal gear 10-1 is mounted on the rake chain drive roller shaft 10-3, and the rake chain 10-5 is wrapped around the rake chain octagonal gear 10-1 and the rake chain driven roller 10-7. The rake chain octagonal gear 10-1 receives power from the rake chain drive gear 17 to drive the rake chain 10-5.

[0036] The rake chain 10-5 is composed of a transmission belt 10-5-1, connecting bolts and nuts 10-5-2, and rake rods 10-5-3. The rake rods 10-5-3 are fixed between the two transmission belts 10-5-1 by connecting bolts and nuts 10-5-2. The center distance between the rake rods 10-5-3 is 45mm to 55mm (L). The rake rods 10-5-3 are made of high carbon steel and manganese steel, and their diameter is The harrow chain octagonal gear 10-1 moves the harrow rod 10-5-3 to make the harrow chain 10-5 run.

[0037] The lower conveyor belt mechanism 12 consists of a lower conveyor roller I 12-1, a lower conveyor roller I shaft 12-2, a lower conveyor roller I shaft bearing 12-3, a lower conveyor belt 12-4, a lower conveyor roller II 12-5, a lower conveyor roller II shaft 12-6, and a lower conveyor roller II shaft bearing 12-7. The lower conveyor belt mechanism 12 is mounted on the feeding device side plate 7 via the lower conveyor roller I shaft 12-2, lower conveyor roller II shaft 12-6, lower conveyor roller I shaft bearing 12-3, and lower conveyor roller II shaft bearing 12-7, located below the rake chain mechanism 10. The lower conveyor belt 12-4 is made of a rubber belt with a concave-convex pattern on its surface.

[0038] like Figure 6 、 Figure 7 As shown, the rake chain 10-5 is parallel to the lower conveyor belt 12-4, and both have the same linear speed. The distance between the rake bar 10-5-3 on the rake chain 10-5 and the surface of the lower conveyor belt 12-4 is 60mm to 80mm. At the sunflower disk feed inlet, the distance between the rake bar 10-5-3 and the lower conveyor belt 12-4 is adjustable. The inlet width is adjusted by the rake bar angle adjustment mechanism 11, and the width can be adjusted to 60mm to 110mm (H).

[0039] like Figure 8 、 Figure 9As shown, the rake chain angle adjustment mechanism 11 includes a rake chain angle adjustment mechanism fixing bolt 11-1, a connecting plate 11-2, a fixed support plate 11-3, a tightening bolt 11-4, a tensioning adjustment bolt 11-5, a movable bracket 11-7, a sector plate 11-8, and a rake chain driven roller bearing 10-8. One end of the rake chain angle adjustment mechanism 11 is fixed to the feeding device side plate 7 via the rake chain angle adjustment mechanism fixing bolt 11-1, and the other end is connected to the rake chain driven roller bearing 10-8 via the sector plate 11-8. One end of the connecting plate 11-2 is connected to the rake chain angle adjustment mechanism 11-1, and the other end is connected to the movable bracket 11-7. A straight groove is machined in the connecting plate 11-2, and the movable bracket 11-7 can be telescopically moved forward and backward along the groove via the tightening bolt 11-4. The fixed support plate 11-3 is welded to the connecting plate 11-2, and a tensioning adjustment bolt 11-5 and a locking nut 11-6 are installed between the fixed support plate 11-3 and the movable bracket 11-7. The movable bracket 11-7 is welded to the sector plate 11-8. The small end of the sector plate 11-8 is fixed to the feeding device side plate 7 together with the movable bracket 11-7 via a fastening bolt 11-4. The large end of the sector plate 11-8 is mounted with a rake chain driven roller shaft bearing 10-7. An arc groove is machined on the feeding device side plate 7 corresponding to the rake chain driven roller shaft 10-6, allowing the rake chain driven roller shaft 11-6 to move up and down.

[0040] The lower conveyor belt tensioning mechanism 13 consists of a connecting base plate 13-1, lower conveyor belt tensioning adjustment bolts 13-2, a fixed plate 13-3, a tensioning adjustment nut 13-4, a movable base plate 13-5, movable base plate fastening bolts and nuts 13-6, and a lower conveyor roller II shaft connecting plate 13-7. The lower conveyor belt tensioning mechanism 13 is mounted on the feeding device side plate 7 via the connecting base plate 13-1, with the other end connected to the lower conveyor roller II shaft 12-6 via the lower conveyor roller II shaft connecting plate 13-7. The fixed plate 13-3 is welded to the connecting base plate 13-1, and the movable base plate 13-5 faces it and is secured within a groove in the feeding device side plate 7 via movable base plate fastening bolts and nuts 13-6. The lower conveyor belt tensioning adjustment bolts 13-2 and tensioning adjustment nuts 13-4 are installed between the fixed plate 13-3 and the movable base plate 13-1.

Claims

1. A clamping feeding device for a sunflower combine harvester, wherein the clamping feeding device (5) is integrally mounted behind a harvesting platform (3) of a sunflower combine harvester (1) and in front of a threshing mechanism (2), and is characterized by: The clamping feeding device (5) is composed of a feeding device side plate (7), a large pulley (6), a small pulley II (8), a bridge gear (9), a rake chain mechanism (10), a lower conveyor belt mechanism (12), a lower conveyor belt tensioning adjustment mechanism (13), a rake chain angle adjustment mechanism (11), a lower conveyor belt supporting wheel (14), a small pulley I (21), a transmission mechanism (26), and a bridge gear tensioning adjustment mechanism (25); The transmission mechanism (26) is composed of a large pulley (6), a small pulley II (8), a bridge gear (9), a bridge transmission belt (24), a rake chain drive gear (17), and a rake chain drive chain (20). The small pulley I (21) is connected to the small pulley II (8) through the bridge transmission belt (24). The small pulley II (8) is connected to the coaxial bridge gear (9) through the bridge transmission shaft (23). The bridge gear (9) is connected to the rake chain drive gear (17) through the rake chain drive chain (20). The rake chain drive gear (17) is coaxial with the intermediate transition gear I (18). The intermediate transition gear I (18) is meshed with the intermediate transition gear III (19). The intermediate transition gear III (19) drives the coaxial intermediate transition gear II (22). The intermediate transition gear II (22) drives the lower conveyor roller drive sprocket (16) through the lower conveyor roller drive chain (15), and finally drives the lower conveyor belt mechanism (12) to operate. The rake chain mechanism (10) is located in the upper inner portion of the clamping feeding device (5), and is composed of a rake chain driving roller (10-2), a rake chain driving roller shaft (10-3), a rake chain driving roller shaft bearing (10-4), a rake chain 10-5, a rake chain driven roller shaft (10-6), a rake chain driven roller (10-7), and a rake chain driven roller shaft bearing (10-8). The rake chain mechanism (10) is installed on the feeding device side plate (7) through the rake chain driving roller shaft (10-3), the rake chain driving roller shaft bearing (10-4), the rake chain driven roller shaft (10-6), and the rake chain driven roller shaft bearing (10-8). The rake chain driving roller shaft (10-3) is sleeved with a rake chain octagonal gear (10-1), and the rake chain (10-5) is wrapped around the rake chain octagonal gear (10-1) and the rake chain driven roller (10-7). The rake chain (10-5) is composed of a transmission belt (10-5-1), connecting bolts and nuts (10-5-2), and a rake bar (10-5-3); the rake bar (10-5-3) is vertically fixed in the middle of the two transmission belts (10-5-1) by the connecting bolts and nuts (10-5-2); The lower conveyor belt mechanism (12) is composed of a lower conveyor roller I (12-1), a lower conveyor roller I shaft (12-2), a lower conveyor roller I shaft bearing (12-3), a lower conveyor belt (12-4), a lower conveyor roller II (12-5), a lower conveyor roller II shaft (12-6), and a lower conveyor roller II shaft bearing (12-7). The lower conveyor belt mechanism (12) is installed on the side plate (7) of the feeding device through the lower conveyor roller I shaft (12-2), the lower conveyor roller II shaft (12-6), the lower conveyor roller I shaft bearing (12-3), and the lower conveyor roller II shaft bearing (12-7), and is located below the rake chain mechanism (10); The rake chain 10-5 is installed in parallel with the lower conveyor belt 12-4; the rake chain angle adjustment mechanism (11) structure includes a rake chain angle adjustment mechanism fixing bolt (11-1), a connecting plate (11-2), a fixed support plate (11-3), a fastening bolt (11-4), a tension adjustment bolt (11-5), a movable bracket (11-7), a fan-shaped plate (11-8), and a rake chain driven roller shaft bearing (10-8); one end of the rake chain angle adjustment mechanism (11) is fixed to the feeding device side plate (7) through the rake chain angle adjustment mechanism fixing bolt (11-1), and the other end is connected to the rake chain driven roller shaft bearing (10-8) through the fan-shaped plate (11-8); one end of the connecting plate (11-2) is connected to the rake chain angle adjustment mechanism fixing bolt (11-1), and the other end is connected to the movable bracket (1 1-7) are connected, a straight groove is processed on the connecting plate (11-2), and the movable bracket (11-7) can be telescopically moved forward and backward along the groove by a fastening bolt (11-4); the fixed support plate (11-3) is welded to the connecting plate (11-2), and a tension adjustment bolt (11-5) and a lock nut (11-6) are installed between the fixed support plate (11-3) and the movable bracket (11-7); the movable bracket (11-7) is welded to the fan-shaped plate (11-8), and the small end of the fan-shaped plate (11-8) is fixed to the feeding device side plate (7) together with the movable bracket (11-7) by a fastening bolt (11-4); the large end of the fan-shaped plate (11-8) is installed with a rake chain driven roller shaft bearing (10-8), and an arc groove is processed on the feeding device side plate (7) of the corresponding rake chain driven roller shaft (10-6); The lower conveyor belt tensioning and adjusting mechanism (13) is composed of a connecting base plate (13-1), a lower conveyor belt tensioning and adjusting bolt (13-2), a tensioning and adjusting nut (13-4), a movable base plate (13-5), a movable base plate fastening bolt and nut (13-6), and a lower conveyor roller II shaft connecting plate (13-7). The lower conveyor belt tensioning and adjusting mechanism (13) is installed on the feeding device side plate (7) through the connecting base plate (13-1), and the other end is connected to the lower conveyor roller II shaft. The connecting plate (13-7) is connected to the lower conveying roller II shaft (12-6); the fixed plate (13-3) is welded to the connecting base plate (13-1), and the movable base plate (13-5) is opposite to it and is fixed in the groove of the feeding device side plate (7) through the movable base plate fastening bolts and nuts (13-6); the lower conveyor belt tensioning adjustment bolt (13-2) and the tensioning adjustment nut (13-4) are installed between the fixed plate (13-3) and the movable base plate (13-5).

2. The clamping feeding device for a sunflower combine harvester according to claim 1, characterized in that: The center distance between the rake rods (10-5-3) is 45mm to 55mm, and the diameter of the rake rods (10-5-3) is 10mm to 15mm.

3. The clamping feeding device for a sunflower combine harvester according to claim 1, characterized in that: The surface of the lower conveying belt (12-4) is processed with concave and convex patterns.

4. The clamping feeding device for a sunflower combine harvester according to claim 1, characterized in that: The distance between the rake chain (10-5), the rake bar (10-5-3) and the surface of the lower conveyor belt (12-4) is 60mm to 80mm. At the sunflower feeding inlet end, the distance between the rake bar (10-5-3) and the lower conveyor belt (12-4) is designed to be adjustable with a width of 60mm.

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