A silage crop feeding device for a silo and a method of operation thereof

Abstract

The application discloses a silage feeding device of a silage machine and a working method thereof, and relates to the technical field of silage machines. The silage feeding device of the silage machine and the working method thereof comprise a shell, which is respectively provided with an inlet and an outlet at two ends, and a rotating drum, which is rotationally connected to the shell through a driving shaft and is provided with movable plates in a circumferential direction, wherein the movable plates are radially telescopic, and the other ends of the movable plates are fixed with cutters. A material passing channel is formed between the gap between the throat plate assembly and the rotating drum, and the throat plate assembly is driven to slide in a horizontal direction by a hydraulic cylinder, so that the material passing channel forms a gradual compression gradient with a large entering end and a small output end, which replaces the mode of compacting material by relying on the spring fixed pre-tightening force in the traditional structure. Regardless of the change of the thickness of the material layer, the compression force can be continuously and actively adjusted along with the material, the material is gradually compacted and air is discharged in the material passing channel, and the subsequent chopping quality and the silage fermentation effect are improved.

Description

Technical Field

[0001] This invention relates to the field of silage harvester technology, specifically to a silage crop feeding device for a silage harvester and its working method. Background Technology

[0002] A silage harvester is an agricultural machine used to harvest, chop, and process silage crops such as corn and forage into silage feed. The feeding and chopping devices are the core components that determine the uniformity of silage cutting, compaction density, and subsequent fermentation quality. The quality of silage feed depends on the uniformity of crop cutting and the degree of compaction. If the crop is cut into long stalks and mixed with fragments, or if it is not compacted sufficiently and leaves a large amount of air, it will seriously affect the fermentation effect and preservation quality of the silage feed.

[0003] The patent with publication number CN221979592U discloses a feeding device for a silage harvester and a silage harvester. This patent applies pressure to the upper roller assembly by setting a pressing component and a tensioning component on the feeding frame. The amount of pre-pressure generated by the upper roller assembly toward the lower roller assembly can be adjusted, thereby enabling the feeding device to adjust the pre-pressure. This allows the feeding roller assembly to apply pressure to the material evenly, thereby improving the material's chopping quality, increasing feed quality, and enhancing economic benefits.

[0004] However, traditional floating top rollers rely on the fixed preload of springs to press crops against the conveying device. When the incoming material layer becomes thinner or the yield decreases, the springs cannot automatically reduce the pressure, and the top rollers will shake violently up and down due to the loss of material support. This not only causes mechanical impact, but also prevents the material from being effectively compacted, leaving a large amount of air residue, which seriously affects the subsequent chopping quality and silage fermentation effect. In addition, the floating top rollers need to float up and down with the thickness of the material during operation, which forces the transmission components that drive its rotation (such as universal drive shafts or floating gearboxes) to swing accordingly. This dynamic swinging increases additional frictional resistance and mechanical wear, consumes some engine power, and reduces transmission efficiency. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a silage crop feeding device for a silage machine and its operating method, solving the problem of constant pre-tightening force in traditional feeding devices.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a silage crop feeding device for a silage machine, comprising a housing with an inlet and an outlet at both ends, and a rotating drum rotatably connected to the housing via a drive shaft, with a movable plate circumferentially mounted on the drum. The movable plate extends and retracts radially along the rotating drum, and a cutter is fixed at the other end of the movable plate. A throat plate assembly is slidably mounted at the bottom of the housing. The throat plate assembly has an arc-shaped structure, and the gap between it and the rotating drum forms a material passage. The throat plate assembly slides horizontally to adjust the width of the inlet and outlet of the material passage, thereby creating a progressive compression gradient along the material conveying direction, with a larger inlet and a smaller outlet.

[0007] Furthermore, the housing is provided with a feeding assembly at the inlet, the feeding assembly including: rollers, two sets of rollers are provided, both rotatably connected to the lower end of the inlet, and a conveyor belt is provided between the two sets of rollers; upper pressure rollers are rotatably connected to the upper end of the inlet, and a fixed frame is tangentially fixedly connected to their outer side, and discs are evenly arranged on the fixed frame, the discs being eccentrically rotatably connected to the fixed frame.

[0008] Furthermore, both sides of the disc bulge outward to form a conical structure, and a scraping comb is fixed at the top inside the shell. The scraping comb is used to scrape off the material trapped between two adjacent discs.

[0009] Furthermore, the rotating drum is provided with a movable cavity, the movable plate is slidably installed in the movable cavity, a guide rod is fixed at the bottom of the movable cavity, the movable plate is provided with a guide hole adapted to the guide rod, and a compression spring is sleeved on the outside of the guide rod between the guide hole and the bottom of the movable cavity.

[0010] Furthermore, the throat plate assembly consists of two parts: an arc-shaped plate and a bottom liner. The arc-shaped plate has an arc-shaped structure with a through groove in its middle. The bottom liner is installed at the through groove and has wedge-shaped teeth that cooperate with the cutter for preliminary cutting of the material.

[0011] Furthermore, a first support plate and a second support plate are fixed at both ends of the arc-shaped plate at the bottom of the housing, and the upper ends of the first support plate and the second support plate are slidably connected to the arc-shaped plate. A hydraulic cylinder is fixed on the second support plate. The hydraulic cylinder is used to drive the arc plate to slide in the horizontal direction. A guide sleeve is provided on the first support plate. A slide rod adapted to the guide sleeve is fixed on the arc plate.

[0012] Furthermore, a support plate is fixed to one side of the first support plate, and two sets of crushing rollers are provided above the support plate. The two sets of crushing rollers rotate relative to each other through the transmission of the second gear set, which is used to further crush the material.

[0013] Furthermore, the upper end of the second support plate is provided with a first horizontal plate that is slidably connected to the arc-shaped plate in the material conveying direction, and the lower end of the arc-shaped plate is provided with a second horizontal plate in the material conveying direction. The second horizontal plate is slidably connected to the gap between the first support plate and the pallet.

[0014] Furthermore, the two sets of rollers are driven by a first transmission component, and one of the rollers is connected to the shaft of the upper pressure roller by a first gear set.

[0015] This invention also relates to a method for operating a silage crop feeding device of a silage machine, comprising the following steps: S1. Crop feeding: Silage crops enter the feeding assembly through the inlet and are conveyed to the inlet end of the material passage by the roller and conveyor belt. At the same time, the upper pressure roller rotates, which drives the eccentric disc on the fixed frame to rotate, guiding and sorting the crops so that the crops enter the material passage evenly. S2, Preliminary Cutting: The hydraulic cylinder drives the throat plate assembly to slide horizontally, making the width of the feed channel at the inlet end greater than the width of the output end, forming a gradual compression gradient. The crop is gradually compacted in the feed channel and air is expelled. At the same time, the drum rotates, causing the movable plate to extend and retract slightly in the radial direction of the drum and drive the cutter to rotate. The cutter engages with the wedge-shaped teeth on the bottom liner to perform preliminary cutting of the compacted crop. S3, Shredding and Discharge: After initial shredding, the material is further shredded by two sets of shredding rollers and discharged from the outlet.

[0016] The present invention has the following beneficial effects: (1) The silage crop feeding device and its working method of the silage machine form a material passage through the gap between the throat plate assembly and the rotating drum, and use the hydraulic cylinder to drive the throat plate assembly to slide in the horizontal direction, so that the material passage forms a progressive compression gradient with a large entry end and a small output end, which replaces the traditional method of relying on spring to fix the pre-tightening force to compact the material. No matter how the thickness of the material layer changes, the compression force can be continuously and actively adjusted with the material. The material is gradually compacted in the material passage and air is discharged, which improves the subsequent chopping quality and silage fermentation effect.

[0017] (2) The silage crop feeding device and its working method of the silage machine achieve adaptive matching of compression force and material quantity by actively adjusting the compression gradient of the material passage through the hydraulic cylinder. It will not frequently block due to excessive clamping force and increase the power consumption of the hydraulic system, nor will it cause slippage and material accumulation when harvesting sparse crops due to insufficient pre-tightening force.

[0018] (3) The silage crop feeding device and its working method of the silage machine: the throat plate assembly can slide in the horizontal direction to realize the adjustment of the width of the material passage, which replaces the traditional floating upper roller movement mode that moves up and down with the thickness of the material. The transmission components such as the drum do not need to swing, and the operation is stable. It eliminates the additional frictional resistance and mechanical wear caused by dynamic swing, reduces power consumption, and improves the transmission efficiency and effective utilization rate of engine power.

[0019] (4) The silage crop feeding device and its working method of the silage machine guide the crop through the eccentric disc, and straighten and bend the mixed crop into a uniform state before entering the cutting zone. Combined with the clamping constraint of the progressive compression gradient in the material passage, the instantaneous speed fluctuation of the crop when entering the cutting zone is suppressed, so that the cutting length tends to be uniform, avoiding the problem of long stalks and fragments mixed in the discharge port, and ensuring the quality of silage. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 In this invention Figure 1 Another perspective view; Figure 3 This is a schematic diagram of the internal structure of the present invention; Figure 4 In this invention Figure 3 The main view; Figure 5 This is a schematic diagram of the installation structure of the throat plate assembly in this invention; Figure 6 In this invention Figure 5 The main view; Figure 7 This is a schematic diagram of the structure of the rotary drum and throat plate assembly in this invention. Figure 8 This is a schematic diagram of the feeding assembly in this invention; Figure 9 This is a diagram showing the positional relationship between the rotating cylinder and the movable plate in this invention; Figure 10 This is a schematic diagram of the installation structure of the movable plate in this invention; Figure 11 This is a schematic diagram of the position and structure of the guide rod in this invention.

[0021] In the diagram, 1. Shell; 2. Feed inlet; 3. Discharge outlet; 4. First transmission component; 5. First gear set; 6. Drive shaft; 7. Second transmission component; 8. Second gear set; 9. Drum; 10. Conveyor belt; 11. Upper pressure roller; 12. Rotary drum; 13. Crushing roller; 14. Arc plate; 15. Bottom liner; 16. First support plate; 17. Second support plate; 18. Support plate; 19. Guide sleeve; 20. Hydraulic cylinder; 21. Movable cavity; 22. Movable plate; 23. Cutter; 24. Compression spring; 25. Guide rod; 26. Fixing frame; 27. Disc; 28. Scraper comb teeth. Detailed Implementation

[0022] The following is based on Figure 1 - Figure 11 This invention describes the silage crop feeding device and its working method for a silage machine provided in an embodiment of the present invention.

[0023] Please see Figure 1 - Figure 11 The present invention provides a technical solution: a silage crop feeding device for a silage machine, comprising a housing 1, with an inlet 2 and an outlet 3 at both ends. In order to realize the feeding, compaction and chopping of silage crops, the silage crop feeding device for the silage machine provided in this embodiment also includes a rotating drum 12 and a throat plate assembly. The rotating drum 12 is rotatably connected to the housing 1 through a drive shaft 6, and the throat plate assembly is slidably installed at the bottom of the housing 1.

[0024] like Figure 3 , Figure 4 , Figure 7 and Figure 9 - Figure 11As shown, to achieve crop cutting, the rotating drum 12 provided in this embodiment has a movable plate 22 along its circumference. The movable plate 22 extends and retracts radially along the rotating drum 12, and a cutter 23 is fixed at the other end of the movable plate 22. The rotating drum 12 has a movable cavity 21, and the movable plate 22 is slidably installed in the movable cavity 21. A guide rod 25 is fixed at the bottom of the movable cavity 21. The movable plate 22 has a guide hole adapted to the guide rod 25, and a compression spring 24 is sleeved on the guide rod 25 between the guide hole and the bottom of the movable cavity 21. It should be noted that when the rotating drum 12 rotates, the movable plate 22 slides outward along the guide rod 25 under the action of the elastic force of the compression spring 24 and the centrifugal force. The movable cutter 23 extends. When the cutter 23 rotates to one side of the throat plate assembly and comes into contact with the crop, the crop generates a reverse thrust on the cutter 23. The reverse thrust pushes the movable plate 22 to retract inward along the guide rod 25 under the elastic action of the compression spring 24, realizing the elastic yielding and adaptive cutting of the cutter 23. This ensures that the cutter 23 always stays in contact with the material layer and can automatically yield when encountering hard materials, avoiding rigid collision damage. It should be further explained that the movable plate 22 extends and retracts slightly in the radial direction of the rotating drum 12, which not only ensures that the cutter 23 can keep in contact with the material layer for continuous cutting during rotation, but also avoids impact wear caused by rigid contact between the cutter 23 and the throat plate assembly.

[0025] To achieve gradual compaction and initial cutting of materials, the throat plate assembly provided in this embodiment is slidably installed at the bottom of the housing 1. The throat plate assembly has an overall arc-shaped structure, with its center at the same height as the center of the rotating drum 12 in the vertical direction, but offset in the horizontal position. The gap between the throat plate assembly and the rotating drum 12 forms a material passage. The throat plate assembly slides horizontally to adjust the width of the material passage at the inlet and outlet ends, so that the material passage forms a gradual compression gradient with a larger inlet end and a smaller outlet end along the material conveying direction. The throat plate assembly consists of two parts: an arc-shaped plate 14 and a bottom liner 15. The arc-shaped plate 14 has an arc-shaped structure with a through groove in its middle, and the bottom liner 15... 5. It can be fixed to the through groove by bolt connection. The bolt connection facilitates disassembly and maintenance in the future. In addition, the bottom liner plate 15 is provided with wedge-shaped teeth that cooperate with the cutter 23 for preliminary cutting of materials. It should be noted that the wedge-shaped teeth are arranged along the material conveying direction, and the contact surface between the cutter 23 and the cutter is a bevel structure. This is mainly to avoid rigid collision between the cutter 23 and the wedge-shaped teeth. When the cutter 23 rotates with the drum 12 and passes the bottom liner plate 15, it cooperates with the wedge-shaped teeth to form a shearing action, and performs preliminary cutting of the compacted crops in the material passage. The wedge-shaped structure of the wedge-shaped teeth creates a progressive cutting shearing gap between the cutter 23 and the tooth blade, which saves cutting effort and is less prone to chipping.

[0026] like Figure 3 , Figure 4 and Figure 6As shown, to achieve orderly feeding of silage crops, the shell 1 provided in this embodiment is equipped with a feeding assembly at the feed inlet 2. The feeding assembly includes a roller 9 and an upper pressure roller 11. There are two sets of rollers 9, both rotatably connected to the lower end of the feed inlet 2. A conveyor belt 10 is provided between the two sets of rollers 9. In addition, the two sets of rollers 9 are driven by a first transmission member 4. One of the rollers 9 is connected to the shaft of the upper pressure roller 11 through a first gear set 5, thereby realizing the synchronous rotation of the rollers 9, the conveyor belt 10 and the upper pressure roller 11. The first transmission member 4 is preferred. The transmission ratio of the first gear set 5 is required to ensure that the speed of the upper pressure roller 11 is not lower than that of the drum 9. Preferably, the speed of the upper pressure roller 11 is greater than that of the drum 9. The speed difference is used to accelerate the input of silage crops and improve the subsequent sorting effect. The upper pressure roller 11 is rotatably connected to the upper end of the feed inlet 2. A fixed frame 26 is tangentially fixedly connected to its outer side. Discs 27 are evenly arranged on the fixed frame 26. The discs 27 are eccentrically rotatably connected to the fixed frame 26, and both sides of the discs 27 bulge outward to form a conical structure.

[0027] It should be noted that when the upper pressure roller 11 rotates, it drives the fixed frame 26 to rotate. Since the disc 27 is eccentrically connected to the fixed frame 26, the disc 27 rotates around its own eccentric axis while revolving with the fixed frame 26. This generates a continuous pushing and guiding effect on the crops entering between the upper pressure roller 11 and the conveyor belt 10, sorting and arranging the straightened and bent crops so that they are evenly arranged in the conveying direction and enter the material passage, avoiding cross-entanglement of the crops. The conical structures that bulge outward on both sides of the disc 27 can divert the crops to both sides of the disc 27, so that the crops are evenly spread out. The top of the shell is fixed with scraping comb teeth 28, which are used to scrape off the material sandwiched between two adjacent discs 27, preventing the material from entangled and accumulating between the discs 27 and affecting the guiding and sorting effect.

[0028] like Figure 3 - Figure 7 As shown, in order to achieve horizontal sliding adjustment of the throat plate assembly, the bottom of the housing 1 provided in this embodiment is fixed with a first support plate 16 and a second support plate 17 at both ends of the arc plate 14. The upper ends of the first support plate 16 and the second support plate 17 are slidably connected to the arc plate 14. A hydraulic cylinder 20 is fixed on the second support plate 17. The hydraulic cylinder 20 is used to drive the arc plate 14 to slide in the horizontal direction. A guide sleeve 19 is provided on the first support plate 16. A slide rod adapted to the guide sleeve 19 is fixed on the arc plate 14.

[0029] When the piston rod of the hydraulic cylinder 20 extends or retracts, it drives the arc-shaped plate 14 to slide horizontally. The arc-shaped plate 14 is slidably connected to the guide sleeve 19 via a sliding rod, which guides and limits its movement, ensuring smooth operation. Because the throat plate assembly has an arc-shaped structure, its arc axis is offset from the axis of the rotating drum 12. When the hydraulic cylinder 20 drives the arc-shaped plate 14 to slide horizontally, the arc-shaped plate 14 is displaced relative to the center of the rotating drum 12, causing a change in the width of the material passage's inlet and outlet. When the arc-shaped plate 14 slides towards the feed inlet 2, the width of the material passage's inlet increases, and the width of the outlet... The width at the inlet decreases, forming a gradual compression gradient with a large inlet and a small outlet. At this time, when the crop enters the material passage from the inlet, the cross-section is large and the pressure is low. As the conveyor advances, the cross-section of the passage gradually narrows, and the crop is gradually compacted. On the one hand, this achieves gradual compression, avoiding hard blockage caused by sudden clamping of the material at a certain position. On the other hand, the material is cut under compaction, which can achieve better cutting effect and ensure more uniform cutting. At the same time, since the compression force is actively adjusted by the hydraulic cylinder 20, the compression gradient can be adjusted in real time according to the density of the material and changes in output, so that the compression force and the amount of material are adaptively matched.

[0030] like Figure 3 - Figure 6 As shown, in order to further crush the material after initial cutting, a support plate 18 is fixed on one side of the first support plate 16 provided in this embodiment. Two sets of crushing rollers 13 are provided above the support plate 18. The two sets of crushing rollers 13 rotate relative to each other through the transmission of the second gear set 8. The transmission ratio of the second gear set 8 is 1:1 to ensure that the two sets of crushing rollers 13 rotate relative to each other at the same speed, thereby realizing the further crushing of silage crops and pushing them to the discharge port 3 for discharge through the crushing rollers 13. The drive shaft 6, the upper pressure roller 11 and the crushing rollers 13 located above are driven by the second transmission component 7. The second transmission component 7 can be selected as a sprocket and chain drive to reduce the power source. Of course, it can also be driven by a motor alone to facilitate the control of the working process.

[0031] like Figure 3 - Figure 6 As shown, to prevent silage crops from accumulating at the sliding part of the throat plate assembly, thereby affecting the conveying effect, the second support plate 17 provided in this embodiment has a first horizontal plate slidably connected to the arc plate 14 at its upper end facing the material conveying direction, and a second horizontal plate at the end of the arc plate 14 facing the material conveying direction. The second horizontal plate is slidably connected to the gap between the first support plate 16 and the support plate 18. The first horizontal plate and the second horizontal plate provide sliding support and sealing guidance for both ends of the arc plate 14, ensuring the sealing of the material passage during the sliding adjustment of the throat plate assembly. Both the first horizontal plate and the second horizontal plate face the material conveying direction, making the material conveying smoother and avoiding material accumulation and jamming.

[0032] During use (operation), the hydraulic cylinder 20 drives the throat plate assembly to slide horizontally, making the width of the material passage at the inlet end greater than the width of the outlet end, thus forming a progressive compression gradient.

[0033] The silage crop is fed into the feeding assembly through the inlet 2, and then conveyed to the inlet end of the material passage by the roller 9 and the conveyor belt 10. At the same time, the upper pressure roller 11 rotates, which drives the eccentric disc 27 on the fixed frame 26 to rotate, guiding and sorting the crop so that the crop enters the material passage evenly.

[0034] As the crop is gradually compacted and air is expelled within the material passage, the drive shaft 6 drives the rotating drum 12 to rotate, which in turn drives the cutter 23 to rotate. The cutter 23 engages with the wedge-shaped teeth on the bottom liner 15 to initially cut the compacted crop. During the rotation of the rotating drum 12, the movable plate 22 slides outward along the guide rod 25 under the action of the elastic force of the compression spring 24 and centrifugal force. The movable plate 22 drives the cutter 23 to extend. When the cutter 23 rotates to the throat plate assembly side and contacts the crop, the crop generates a reverse thrust on the cutter 23. The reverse thrust pushes the movable plate 22 to retract inward along the guide rod 25 under the elastic action of the compression spring 24, realizing the elastic yielding and adaptive cutting of the cutter 23. This ensures that the cutter 23 always remains in contact with the material layer and can automatically yield when encountering hard materials, avoiding rigid collision damage.

[0035] After initial slicing, the material is further shredded by two sets of crushing rollers 13 and then discharged from the outlet 3, completing the entire process of feeding, compacting and shredding silage crops.

[0036] The present invention also provides a method for operating the silage crop feeding device of a silage harvester, comprising the following steps: S1. Crop feeding: Silage crops enter the feeding assembly through the feed inlet 2 and are conveyed to the feed channel entry end by the roller 9 and the conveyor belt 10. At the same time, the upper pressure roller 11 rotates, driving the eccentric disc 27 on the fixed frame 26 to rotate, guiding and sorting the crops so that the crops enter the feed channel evenly. S2, Preliminary cutting: The hydraulic cylinder 20 drives the throat plate assembly to slide horizontally, making the width of the feed channel at the inlet end greater than the width of the output end, forming a gradual compression gradient. The crop is gradually compacted in the feed channel and air is expelled. At the same time, the rotating drum 12 rotates, causing the movable plate 22 to extend and retract slightly in the radial direction of the rotating drum 12 and drive the cutter 23 to rotate. The cutter 23 cooperates with the wedge teeth on the bottom liner 15 to perform preliminary cutting of the compacted crop. S3, Shredding and Discharge: After initial shredding, the material is further shredded by two sets of shredding rollers 13 and then discharged from the discharge port 3.

Claims

1. A silage crop feeding device for a silage machine, comprising a housing (1) having an inlet (2) and an outlet (3) at its two ends, characterized in that, Also includes: The rotating drum (12) is rotatably connected to the housing (1) via the drive shaft (6). A movable plate (22) is provided on its circumferential side. The movable plate (22) extends and retracts radially along the rotating drum (12), and a cutter (23) is fixed at the other end of the movable plate (22). The throat plate assembly is slidably installed at the bottom of the housing (1). The throat plate assembly has an arc-shaped structure, and the gap between it and the rotating drum (12) forms a material passage. The throat plate assembly slides in the horizontal direction to adjust the width of the material passage's inlet and outlet ends, so that the material passage forms a progressive compression gradient with a large inlet end and a small outlet end along the material conveying direction.

2. The silage crop feeding device for a silage machine according to claim 1, characterized in that, The housing (1) is provided with a feeding assembly at the feed inlet (2), the feeding assembly comprising: Roller (9), the roller (9) is provided in two sets, both of which are rotatably connected to the lower end of the feed inlet (2), and a conveyor belt (10) is provided between the two sets of rollers (9). The upper pressure roller (11) is rotatably connected to the upper end of the feed inlet (2), and a fixed frame (26) is fixedly connected to its outer side along the tangential direction. A disc (27) is evenly arranged on the fixed frame (26), and the disc (27) is eccentrically rotatably connected to the fixed frame (26).

3. The silage crop feeding device for a silage machine according to claim 2, characterized in that, Both sides of the disc (27) are raised outward to form a conical structure. The top of the shell (1) is fixed with scraping comb teeth (28), which are used to scrape off the material trapped between two adjacent discs (27).

4. The silage crop feeding device for a silage machine according to claim 3, characterized in that, The rotating drum (12) is provided with a movable cavity (21), and the movable plate (22) is slidably installed in the movable cavity (21). A guide rod (25) is fixed at the bottom of the movable cavity (21). A guide hole adapted to the guide rod (25) is provided in the movable plate (22), and a compression spring (24) is sleeved on the guide rod (25) between the guide hole and the bottom of the movable cavity (21).

5. The silage crop feeding device for a silage machine according to claim 4, characterized in that, The throat plate assembly consists of two parts: an arc plate (14) and a bottom liner (15). The arc plate (14) has an arc structure with a through groove in its middle. The bottom liner (15) is installed in the through groove and has wedge-shaped teeth that cooperate with the cutter (23) for preliminary cutting of the material.

6. The silage crop feeding device for a silage machine according to claim 5, characterized in that, The bottom of the shell (1) is fixed with a first support plate (16) and a second support plate (17) at both ends of the arc plate (14). The upper ends of the first support plate (16) and the second support plate (17) are slidably connected to the arc plate (14). A hydraulic cylinder (20) is fixed on the second support plate (17). The hydraulic cylinder (20) is used to drive the arc plate (14) to slide in the horizontal direction. A guide sleeve (19) is provided on the first support plate (16). A sliding rod adapted to the guide sleeve (19) is fixed on the arc plate (14).

7. The silage crop feeding device for a silage machine according to claim 6, characterized in that, A support plate (18) is fixed on one side of the first support plate (16). Two sets of crushing rollers (13) are provided above the support plate (18). The two sets of crushing rollers (13) rotate relative to each other through the transmission of the second gear set (8) to further crush the material.

8. The silage crop feeding device for a silage machine according to claim 7, characterized in that, The upper end of the second support plate (17) is provided with a first horizontal plate that is slidably connected to the arc plate (14) in the material conveying direction. The lower end of the arc plate (14) is provided with a second horizontal plate in the material conveying direction. The second horizontal plate is slidably connected to the gap between the first support plate (16) and the pallet (18).

9. A silage crop feeding device for a silage machine according to any one of claims 3-8, characterized in that, The two sets of rollers (9) are driven by the first transmission component (4), and one of the rollers (9) is connected to the shaft of the upper pressure roller (11) by the first gear set (5).

10. A method for operating a silage crop feeding device for a silage harvester, applicable to the silage crop feeding device of the silage harvester according to any one of claims 7-9, characterized in that, Includes the following steps: S1. Crop feeding: Silage crops enter the feeding assembly through the feed inlet (2) and are transported to the feed channel entry end by the roller (9) and conveyor belt (10). At the same time, the upper pressure roller (11) rotates, driving the eccentric disc (27) on the fixed frame (26) to rotate, guiding and sorting the crops so that the crops enter the feed channel evenly. S2, Preliminary cutting: The hydraulic cylinder (20) drives the throat plate assembly to slide horizontally, so that the width of the feed channel at the inlet end is greater than the width of the output end, forming a progressive compression gradient. The crop is gradually compacted in the feed channel and air is discharged. At the same time, the drum (12) rotates, driving the movable plate (22) to extend and retract slightly in the radial direction of the drum (12) and driving the cutter (23) to rotate. The cutter (23) cooperates with the wedge teeth on the bottom liner (15) to perform preliminary cutting on the compacted crop. S3, Shredding and Discharge: After the material is initially shredded, it is further shredded by two sets of shredding rollers (13) and discharged from the discharge port (3).

Images