Using method of external winding type bundling device with built-in adjustable cam

Abstract

The invention discloses a using method of an external winding type bundling device with a built-in adjustable cam, the external winding type bundling device comprises a bundling component, a fixed bin wall, a movable bin wall, the cam, a lead screw driving block, a lead screw, a limiting fork and a material shifting plate, the cam comprises a cam shaft, cam surfaces and a cam limiting part, the four cam surfaces are arranged around the cam shaft in a rhombus shape and are connected through fillets, and the cam surfaces are connected through the fillets. The material stirring plate comprises a material stirring plate shaft, a limiting plate, a spring hanging hole, an inner arc surface, an outer arc surface and an arc surface, rotation and translation of the cam can be reasonably utilized to reduce the throwing and dispersing effect of bundled initial materials, grass core formation is accelerated, the grass core density is improved, the radial local density uniformity of the bales is improved, and the quality of the bales is improved. And the safety of the device in the using process is improved through a limiting fork and a shifting plate structure at the same time.

Description

Technical Field

[0001] The invention belongs to the field of agricultural harvesting technology and equipment, and in particular relates to a method for using an external winding baling device with a built-in adjustable cam. Background Art

[0002] The baler can pack loose forage, feed, straw, soybean meal, cotton wool and other agricultural factory by-products into bales with higher density and regular shape, and can be used with film wrapping equipment to make silage bales. The use of balers can improve the harvesting, storage and utilization efficiency of forage or crop waste, reduce mechanization costs, and play an important role in the field of agricultural harvesting. External winding balers are a large category of round balers. Because the baling components are arranged around the baling bin, the materials fed in the early stage of baling cannot be effectively compacted, resulting in the formation of a non-uniform density distribution of "loose inside and tight outside" in the final bale. At the same time, the uneven distribution of the material's physical density will lead to the distribution of oxygen content inside the silage bale, which will further affect the quality of silage fermentation. Therefore, the uneven distribution of the density of the bales made by the external winding round baler limits the further improvement of the overall density of the bales and the fermentation quality of the bales.

[0003] Figure 1 It is a typical arrangement of the baling components of an external winding round baler in the prior art and a form of material movement in the initial stage of baling, which is actually a rotary movement of the material in the baling chamber. Figure 2 Typical images obtained from the rotation test for reference to the size and motion parameters of the external wrapping round baler. As can be seen from the two pictures, in the early stage of baling, the fed material climbs along the outer circle of the baling bin driven by the baling components (a), and then forms a dispersed throwing material flow (b), and a stable hollow part or material group will be formed between the two areas (c). The throwing movement in the upper left (the direction of the attached figure) will make the material looser, which is not conducive to the accumulation and density of the material in the baling process. Therefore, limiting this throwing and dispersing effect is the key to solving the problem. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a method for using an external winding baling device with a built-in adjustable cam, which can limit the throwing and dispersion effect, accelerate material accumulation and improve the degree of densification during the baling process, and further improve the core density and overall density of the straw bale.

[0005] In order to achieve the above objectives, the present invention solves the problem through the following technical solutions: a method for using an external winding baling device with a built-in adjustable cam, including a bundling component, a fixed bin wall, a movable bin wall, a cam, a screw drive block, a screw, a limit fork, and a material shifting plate.

[0006] The bundling components are arranged in a ring, and their inner surfaces form a bin outer circle. The opening at the lower left of the bin outer circle where no bundling components are arranged is a feeding port. The material is continuously fed from the feeding port, and the bundling components can drive the material in the bin to rotate counterclockwise along the bin outer circle under the action of external power and transmission. The bin outer circle is the maximum movement boundary of the material.

[0007] The fixed warehouse wall is symmetrically arranged on both sides of the bundled components, and the structure thereon is also arranged mirror-symmetrically with respect to the bundled components, including a slide slot, an upper limit sensor, a lower limit sensor, and a spring mounting plate. The fixed warehouse wall is a fixed part and also serves as a frame to bear other components.

[0008] The movable warehouse wall is symmetrically arranged on both sides of the plurality of bundling components, and is hinged to the fixed warehouse wall at the door hinge point, and can rotate around the door hinge point under the action of external power to realize the opening and closing of the warehouse. The curve of the contact part of the movable warehouse wall and the fixed warehouse wall is exactly the same, so that the bundling warehouse can be completely closed after closing.

[0009] The cam comprises a cam shaft, a cam surface and a cam limiter.

[0010] The camshaft is a through-shaft in the center of the cam, and is slidably matched with the slide slot, so that the cam can move up and down in the slide slot driven by external power. At the same time, the external power acts on both ends of the camshaft, so that the cam as a whole can rotate around the camshaft.

[0011] The four cam surfaces are arranged in a rhombus shape around the cam shaft and are connected by rounded corners.

[0012] The cam limiter is on the camshaft and is symmetrically arranged on both sides of the cam surface. The cam limiter is a rounded rectangle with a distance of B between the two long sides and a distance r from the farthest point on the rounded rectangle to the center. With the center line of the camshaft as the center, the cam limiter and the cam surface as a whole have a deflection angle α.

[0013] The lead screw drive block is fixed to the outer side of the fixed bin wall, compared to the entire device. The upper rod of the lead screw cooperates with the lead screw drive block, and the lower ring cooperates with the cam shaft for rotation. The lead screw drive block and the lead screw are also symmetrically arranged on both sides of the plurality of bundled components. The lead screw drive block can receive an external control signal and drive the lead screw to move up and down, and further drive the cam to move up and down.

[0014] The limit fork is fixed to the outer side of the screw drive block. Compared with the whole device, the limit fork is fixed to the screw drive block through the upper part, and has a special-shaped opening groove at the lower part, which is connected by the limit adjustment surface and the limit surface arc. The diameter of the two limit adjustment surfaces is r, and the width between the two limit surfaces is B.

[0015] The material-shifting plate comprises a material-shifting plate shaft, a limit plate, a spring hanging hole, an inner arc surface, an outer arc surface and a circular arc surface.

[0016] The material-shifting plate shaft is a shaft that passes through the center of the material-shifting plate and is rotatably matched with the circular hole on the wall of the fixed bin.

[0017] The limit plate is a fixed part at both ends of the feed plate shaft, and the spring mounting hole is at one end of the limit plate shaft of the limit plate principle. A tension spring is mounted between the spring mounting hole and the spring mounting plate, so that the feed plate can rotate upward as much as possible. The inner arc surface, the outer arc surface and the circular arc surface are connected end to end in sequence. The radius of the circular arc surface is R, and it is coaxial with the center axis of the feed plate shaft. The radius of the inner arc surface and the outer arc surface are both R, and they are connected by a fillet with a radius of R. The fillet with a radius of R is smaller than the fillet radius of the end of the cam surface.

[0018] The upward rotating plate can move up to the limit plate and trigger the upper limit sensor. Under the action of other forces, the plate can also move downward to the limit plate and trigger the lower limit sensor. The range of the limit plate rotation allowed between the upper limit sensor and the lower limit sensor is angle β.

[0019] A method for using an external winding baling device with a built-in adjustable cam comprises the following steps: S1: Start the device, several bundled components move under external drive and transmission, and the speed formed at the outer circle of the bin is n 0 , the direction is counterclockwise; S2: A small amount of material is fed from the feeding port, and the material flow cannot hit the rotating outer circle of the cam surface at the lower limit position. At this time, the cam is stationary; S3 material continues to be fed, and the material flow enters the rotating outer circle of the cam surface at the lower limit position, but cannot touch the rotating inner circle. At this time, the cam rotates at a speed of n 1 Rotate counterclockwise to satisfy n 1 <n 0 At this time, the cam reverses at a lower speed, which can effectively block the scattered throwing effect; S4 material continues to be fed, the material flow enters the rotating outer circle of the cam surface at the lower limit position, and at the same time has hit the rotating inner circle. At this time, the cam rotates at a speed of n 1 Rotate counterclockwise to satisfy n 1 <n 0 At the same time, the cam moves upward driven by the lead screw to keep the material flow within the inner circle of the rotation, but still within the outer circle of the rotation to prevent the material from flowing through the upper left cam surface; S5: Material continues to be fed. When the cam moves upward to the limit adjustment position, the cam continues to rotate until the long side of the cam limit coincides with the limit surface. The cam continues to move upward driven by the lead screw and stops rotating at the same time. S6 material continues to be fed, and when the cam moves upward to the upper limit position, the feeding stops, and the material in the bin forms a preliminary grass core; The S7 cam moves downward driven by the lead screw, continuously compressing the diameter of the grass core and increasing the density of the grass core, until it moves to the limit adjustment position and the cam stops moving downward; S8 cam speed n 1 Rotating clockwise, the cam surface repeatedly squeezes the formed grass core to reduce the internal stress and reduce the local density unevenness in the radial direction of the grass core to a certain extent; The S9 cam moves downwards driven by the lead screw and rotates clockwise at the same time, continuously compressing the diameter of the grass core and increasing the density of the grass core; When the S10 cam moves downward to the set position (which can be the lower limit position or the lower transition position) driven by the lead screw, the feeding continues and the cam moves upward; S11 repeats S5; S12: Material continues to be fed. When the cam moves upward to the upper limit position and the feeding amount reaches the set target, feeding stops. S13 net (film) wrapping, the movable bin wall rotates counterclockwise around the bin door hinge point to open the bin, and at the same time, the cam moves downward to assist in discharging the bale.

[0020] S14 repeats S1-S13 until the operation is stopped and the device is shut down; During the use of S15, if the limit plate is close to and triggers the lower limit sensor, an abnormal alarm will be issued, and the machine will stop working through manual or automatic system control devices, and continue to work after maintenance is completed.

[0021] The beneficial effects of the present invention are: 1. The cam surface on the cam and the translation, rotation or combined movement of the cam itself can produce a forced interference effect on the movement and deformation of loose materials, thrown materials and straw bales during use. It can be reasonably used to reduce the initial throwing dispersion effect of bales, accelerate the formation of straw cores and increase the density of straw cores, and improve the uniformity of the radial local density of straw bales; 2. During use, when the cam moves upward driven by the lead screw, if the long side of the cam limit does not coincide with the limit surface, the outer periphery of the cam limit will contact the limit adjustment surface and prevent the cam from moving further upward, preventing the cam surface from colliding with the bundled components, thereby improving the safety of the device when in use; 3. When materials squeeze into the space between the material-diverting plate and the bundled component for various reasons, forcing the material-diverting plate to rotate downward, when the materials are large enough to make the limit plate close to the limit plate and trigger the lower limit sensor, an abnormal alarm will be issued, and the device will stop working through manual or automatic system control, thereby improving the safety of the device during use; BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1It is a typical external wrapping round baler with a layout of baling components and a form of material movement in the initial stage of baling. Figure 2 Typical images obtained by conducting a rotation test to refer to the dimensions and motion parameters of an external wrapping round baler; Figure 3 is a schematic diagram of the device structure; Figure 4 It is a front view of the device; Figure 5 is a schematic diagram of a cam; Figure 6 It is the front view of the cam; Figure 7 It is a schematic diagram of the limit fork; Figure 8 This is a schematic diagram of the material transfer plate; Fig. 9 This is a schematic diagram of the full section of the material transfer plate; Fig.10 It is a schematic diagram of the cam being located at the lower limit position; Fig.11 It is a schematic diagram of the cam being in the middle position with two cam surfaces in the vertical direction; Fig.12 It is a schematic diagram of the cam being located at the limit adjustment position; Fig.13 for Figure 4 The limit adjustment position at I in the middle shows an enlarged schematic diagram of the hidden lead screw; Fig.14 for Figure 4 A full-section enlarged schematic diagram of the limit adjustment position at position I in the middle; Fig.15 It is a schematic diagram of the cam being located at the upper limit position; Fig.16 for Figure 4 The upper limit position at I in the middle is in normal state, and the enlarged schematic diagram of the hidden lead screw; Fig.17 for Figure 4 A full-section enlarged schematic diagram of the normal state of the upper limit position at I in the middle; Fig.18 for Figure 4 The upper limit position abnormal state at I in the middle, an enlarged schematic diagram of the hidden lead screw; Fig.19 for Figure 4 A full-section enlarged schematic diagram of the abnormal state of the upper limit position at I in the middle; In the figure, the reference numerals are: 0 Warehouse door hinge point 1 Bundle parts 2 Fixed silo wall 201 Chute 202 Upper limit sensor 203 Lower limit sensor 204 Spring mounting plate 3 Active warehouse wall 4 Cam 401 Camshaft 402 Cam surface 403 Cam limit 5 Screw drive block 6 Lead Screw 7 Limit fork 701 Limit adjustment surface 702 Limiting surface 9 Feed plate 901 Stripper plate shaft 902 Limiting plate 903 Spring mounting hole 904 inner cambered surface 905 Outer curved surface 906 Arc surface 10 Warehouse outer circle 20 Feeding port 30 Rotation outer circle 40 Rotation inner circle DETAILED DESCRIPTION The specific implementation of the present invention is further described in detail below with reference to the accompanying drawings: Figure 2-Figure 19 , A method for using an external winding baling device with a built-in adjustable cam comprises a baling component 1, a fixed bin wall 2, a movable bin wall 3, a cam 4, a lead screw driving block 5, a lead screw 6, a limit fork 7, and a material shifting plate 9.

[0023] The bundling components 1 are arranged in a ring, and their inner surface forms a bin outer circle 10. The opening at the lower left of the bin outer circle 10 where no bundling components 1 are arranged is a feeding port 20. The material is continuously fed from the feeding port 20. Under the action of external power and transmission, the bundling components 1 can drive the material in the bin to rotate counterclockwise along the bin outer circle 10, and limit the increase of the bale volume in the later stage of bundling, so that the bale is transformed from a loose state to a dense state. The bin outer circle 10 is the maximum movement boundary of the material.

[0024] The fixed warehouse wall 2 is symmetrically arranged on both sides of the plurality of bundled components 1, and the structures thereon are also arranged mirror-symmetrically with respect to the bundled components 1, including a slide slot 201, an upper limit sensor 202, a lower limit sensor 203, and a spring mounting plate 204. The fixed warehouse wall 2 is a fixed part and also serves as a frame to bear other components.

[0025] The movable warehouse wall 3 is symmetrically arranged on both sides of the plurality of bundling components 1, and is hinged to the fixed warehouse wall 2 at the warehouse door hinge point 0, and can rotate around the warehouse door hinge point 0 under the action of external power to realize opening and closing of the warehouse. The curve of the contact part of the movable warehouse wall 3 and the fixed warehouse wall 2 is exactly the same, so that the bundling warehouse can be completely closed after closing.

[0026] The cam 4 includes a cam shaft 401 , a cam surface 402 , and a cam limiter 403 .

[0027] The camshaft 401 is a through-shaft in the center of the cam 4, and is slidably matched with the slide slot 201, so that the cam 4 can be driven by external power to move up and down in the slide slot 201. At the same time, the external power acts on both ends of the camshaft 401, so that the cam 4 can rotate around the camshaft 401 as a whole.

[0028] The four cam surfaces 402 are arranged in a rhombus shape around the cam shaft 401 and connected by rounded corners. The cam surface 402 on the cam 4 and the translation, rotation or combined movement of the cam 4 itself can produce a forced interference effect on the movement and deformation of loose materials, thrown materials, and straw bales during use. It is a core working component that reduces the initial throwing dispersion effect of bale formation, accelerates the formation of straw cores and increases the density of straw cores, and improves the uniformity of the radial local density of straw bales.

[0029] The cam stopper 403 is on the camshaft 401 and is symmetrically arranged on both sides of the cam surface 401. The cam stopper 403 is a rounded rectangle with a distance between the two long sides of B and a distance from the farthest point on the rounded rectangle to the center of r. With the center line of the camshaft 401 as the center, the cam stopper 403 and the cam surface 402 have a deflection angle α as a whole.

[0030] The lead screw drive block 5 is fixed to the outer side of the fixed bin wall 2, compared to the entire device. The upper rod of the lead screw 6 cooperates with the lead screw drive block 5, and the lower ring cooperates with the cam shaft 401. The lead screw drive block 5 and the lead screw 6 are also symmetrically arranged on both sides of the plurality of bundled components 1. The lead screw drive block 5 can receive an external control signal and drive the lead screw 6 to move up and down, and further drive the cam 4 to move up and down.

[0031] The limit fork 7 is fixed to the outer side of the screw drive block 5. Compared with the whole device, the limit fork 7 is fixed to the screw drive block 5 through the upper part, and has a special-shaped opening groove at the lower part, which is connected by the limit adjustment surface 701 and the limit surface 702. The diameter of the two limit adjustment surfaces 701 is 2r, and the width between the two limit surfaces 702 is B.

[0032] The material-diverting plate 9 includes a material-diverting plate shaft 901 , a limiting plate 902 , a spring hanging hole 903 , an inner arc surface 904 , an outer arc surface 905 , and an arc surface 906 .

[0033] The material-diverting plate shaft 901 is a shaft that passes through the center of the material-diverting plate 9 and is rotatably matched with the circular hole on the fixed bin wall 2 .

[0034] The limit plate 902 is a fixed part at both ends of the material stripper plate shaft 901, and the spring mounting hole 903 is at one end of the limit plate 902 away from the material stripper plate shaft 901. A tension spring is mounted between the spring mounting hole 903 and the spring mounting plate 204, so that the material stripper plate 9 can rotate upward as much as possible. The inner arc surface 904, the outer arc surface 905 and the circular arc surface 906 are connected end to end in sequence. The circular arc surface 906 has a radius of R1 and is coaxial with the material stripper plate shaft 901. The radii of the inner arc surface 904 and the outer arc surface 905 are both R3, and are connected by a fillet with a radius of R2. The fillet with a radius of R2 is smaller than the fillet radius of the end of the cam surface 402.

[0035] like Fig.13 , Fig.16 , Fig.18 As shown, the material-diverting plate 9 that rotates upward can move at most until the limit plate 902 is in close contact with and triggers the upper limit sensor 202. Under the action of other forces, the material-diverting plate 9 can also rotate downward at most until the limit plate 902 is in close contact with and triggers the lower limit sensor 203. Between the upper limit sensor 202 and the lower limit sensor 203, the range of rotation of the limit plate 902 is allowed to be an angle β.

[0036] For ease of description, define: Lower limit position: Fig.10 As shown, the cam 4 moves up and down until the cam shaft 401 is located at the bottom of the slide slot 201; Lower transition position: Fig.11 As shown, the cam 4 moves up and down to between the lower limit position and the limit adjustment position; Limit adjustment position: Figure 12-14 As shown, the cam 4 moves up and down until the cam limit 403 rotates with the limit adjustment surface 701, and the cam 4 can rotate under the drive of external power; Upper transition position: the cam 4 moves up and down to between the upper limit position and the limit adjustment position, at which time the long side of the cam limit 403 coincides with the limit surface 702, and the cam 4 cannot rotate under the drive of external power; Upper limit position: Figure 15-19 As shown, the cam 4 moves up and down until the camshaft 401 is located at the uppermost part of the slide slot 201. At this time, the cam surface 402 is in close contact with the outer circle 10 of the bin, and the long side of the cam limiter 403 coincides with the limiter surface 702. The cam 4 cannot rotate under external power drive.

[0037] A method for using an external winding baling device with a built-in adjustable cam comprises the following steps: S1: Start the device, several bundled components 1 move under external drive and transmission, and the speed formed at the outer circle 10 of the bin is n 0 ,from Fig.10 From the perspective of observation, the direction is counterclockwise; S2: A small amount of material is fed in from the feeding port 20. Fig.10 From the visual angle, the material flow cannot hit the rotating outer circle 30 of the cam surface 402 at the lower limit position, and the cam 4 is stationary at this time; S3 material continues to feed, from Fig.10 From the perspective of the material flow, the material flows into the rotating outer circle 30 of the cam surface 402 at the lower limit position, but cannot touch the rotating inner circle 40. At this time, the cam rotates at a speed n 1 Rotate counterclockwise to satisfy n 1 <n 0 At this time, the cam 4 reverses at a lower speed, which can effectively block the dispersion and throwing effect; S4 material continues to feed, from Fig.10 From the perspective of the material flow, the material flow enters the rotating outer circle 30 of the cam surface 402 at the lower limit position, and has hit the rotating inner circle 40 at the same time. At this time, the cam 4 is rotating at a speed n 1 Rotate counterclockwise to satisfy n 1 <n 0At the same time, the cam 4 moves upward under the drive of the lead screw 6, keeping the material flow within the range of the inner circle 40 of the rotation, but still within the range of the outer circle 30 of the rotation, so as to prevent the material from flowing through the upper left cam surface 402; S5 The material continues to be fed, and when the cam 4 moves upward to the limit adjustment position, the cam 4 continues to rotate until the long side of the cam limit 403 coincides with the limit surface 702, and the cam 4 continues to move upward driven by the lead screw 6, and the rotational motion stops at the same time; S6 The material continues to be fed, and when the cam 4 moves upward to the upper limit position, the feeding stops, and the material in the bin forms a preliminary straw core; S7 cam 4 moves downward under the drive of lead screw 6, continuously compressing the diameter of the grass core and increasing the density of the grass core, until it moves to the limit adjustment position, and cam 4 stops moving downward; S8 cam 4 at speed n 1 The cam surface 402 rotates clockwise and repeatedly squeezes the formed grass core to reduce the internal stress and reduce the local density non-uniformity in the radial direction of the grass core to a certain extent; The S9 cam 4 moves downwards driven by the lead screw 6 and rotates clockwise at the same time, continuously compressing the diameter of the grass core and increasing the density of the grass core; S10 When the cam 4 moves downward to a set position (which may be a lower limit position or a lower transition position) driven by the lead screw 6, the feeding continues and the cam 4 moves upward; S11 repeats S5; S12: Material continues to be fed. When the cam 4 moves upward to the upper limit position and the feeding amount reaches the set target, the feeding is stopped. S13 wraps the net (film), and the movable bin wall 3 rotates counterclockwise around the bin door hinge point 0 to open the bin. At the same time, the cam 4 moves downward to assist in discharging the bale.

[0038] S14 repeats S1-S13 until the operation is stopped and the device is shut down; S15 During use, if the limit plate 902 is pressed against and triggers the lower limit sensor 203, an abnormal alarm will be issued, and the device will stop working through manual or automatic system control, and continue working after maintenance is completed.

[0039] During use, when the cam 4 moves upward driven by the lead screw 6, if the long side of the cam limit 403 does not overlap with the limit surface 702, the outer periphery of the cam limit 403 contacts the limit adjustment surface 701 and prevents the cam 4 from further moving upward, thereby preventing the cam surface 402 from colliding with the bundling component 1. Only when the cam 4 is further rotated by external power until the long side of the cam limit 403 overlaps with the limit surface 702, can the cam 4 move further upward driven by the lead screw 6. When the cam 4 moves to the uppermost end allowed by the slide slot 201 driven by the lead screw 6, the cam surface 402 is tightly attached to the outer circle 10 of the bin and will not collide with the moving bundling component 1.

[0040] like Fig.16 and 17 The upper limit position is shown in the normal state: during use, especially in the later stage of the bundling process, the cam 4 should be as close to the outer circle 10 of the bin as possible. When the cam 4 moves to the uppermost part allowed by the slide 201 under the drive of the lead screw 6, the cam surface 402 is in close contact with the outer circle 10 of the bin. Only a very small amount of material can pass between the cam surface 402 and the bundling component 1. Ideally, no material should pass through, otherwise it will affect the flow of materials and even damage the device components. Under normal conditions, under the action of the spring, the limit plate 902 of the material stripping plate 9 is in close contact with the upper limit sensor 202, and the fillet with a radius of R2 is in close contact with the outer circle 10 of the bin. Since the fillet with a radius of R2 is smaller than the fillet radius of the end of the cam surface 402, it can effectively prevent the material from entering between the cam 4 or the material stripping plate 9 and the bundling component 1. The inner arc surface 904 can guide the material, and the force of the material flow on the inner arc surface 904 will generate an upward rotation torque on the material stripping plate 9, forming a larger combined force with the spring. At the same time, the downward extension line of the inner arc surface 904 does not intersect with the cam surface 402 , which can prevent the material flow from entering between the arc surface 906 and the cam surface 402 and reduce the impact and extrusion of the material flow on the cam 4 .

[0041] like Fig.18 and Fig.19 The upper limit position abnormal state is shown: when due to various reasons, the material squeezes into the space between the material-diverting plate 9 and the bundling component 1, forcing the material-diverting plate 9 to rotate downward. The outer arc surface 905 also plays a role in guiding the flow. When the material is large enough to make the limit plate 902 close to and trigger the lower limit sensor 203, an abnormal alarm will be issued, and the work will be stopped by the manual or automatic system control device.

Claims

1. A method for using an externally wound baling device with an adjustable built-in cam, comprising the following steps: S1. Start the device. A number of bundling components (1) move under external drive and transmission, forming a rotational speed of n0 at the outer circumference of the bin (10), and the direction is counterclockwise. S2. Feed a small amount of material from the feeding port (20). The material flow cannot touch the outer circumference (30) of the cam surface (402) at the lower limit position. At this time, the cam (4) is stationary. S3. Continue to feed the material. The material flow enters the outer circumference (30) of the cam surface (402) at the lower limit position, but cannot touch the inner circumference (40). At this time, the cam (4) rotates counterclockwise at a rotational speed of n1, satisfying n1 < n0. S4. Continue to feed the material. The material flow enters the outer circumference (30) of the cam surface (402) at the lower limit position and has already touched the inner circumference (40). At this time, the cam (4) rotates counterclockwise at a rotational speed of n1, satisfying n1 < n0. At the same time, the cam (4) moves upward under the drive of the lead screw (6), keeping the material flow not exceeding the inner circumference (40), but still within the range of the outer circumference (30). S5. Continue to feed the material. When the cam (4) moves upward to the limit adjustment position, continue to rotate the cam (4). After the long side of the cam limit (403) coincides with the limit surface (702), the cam (4) continues to move upward under the drive of the lead screw (6) and stops rotating at the same time. S6. Continue to feed the material. When the cam (4) moves upward to the upper limit position, stop feeding. At this time, the material in the bin forms a preliminary grass core. S7. The cam (4) moves downward under the drive of the lead screw (6) until it reaches the limit adjustment position, and the cam (4) stops moving downward. S8. The cam (4) rotates clockwise at a rotational speed of n1, and the cam surface (402) repeatedly squeezes the formed grass core. S9. The cam (4) moves downward under the drive of the lead screw (6) and rotates clockwise at the same time. S10. When the cam (4) moves downward to the set position under the drive of the lead screw (6), continue to feed the material, and the cam (4) moves upward. S11. Repeat S5. S12. Continue to feed the material. When the cam (4) moves upward to the upper limit position and the feeding amount reaches the set target, stop feeding. S13. Wind the net. The movable bin wall (3) rotates counterclockwise around the bin door hinge point (0) to open the bin. At the same time, the cam (4) moves downward to assist in discharging the bale. S14. Repeat S1 - S13 until the operation is stopped and the device is closed. S15. During the use process, if the limit plate (902) closely adheres to and triggers the lower limit sensor (203), an abnormal alarm will be issued, and the device will be stopped through manual or automatic system control. After the repair is completed, continue to work.

2. The method for using the external winding baling device with a built-in adjustable cam according to claim 1, characterized in that: The lower limit position mentioned above is: when the cam (4) moves up and down until the camshaft (401) is at the lowest part of the chute (201). The lower transition position is: when the cam (4) moves up and down between the lower limit position and the limit adjustment position. The limit adjustment position is: the cam (4) moves up and down until the cam limit (403) and the limit adjustment surface (701) are rotationally matched, and the cam (4) can rotate under the drive of external power; The upper transition position is: the cam (4) moves up and down to between the upper limit position and the limit adjustment position, at which time the long side of the cam limit (403) coincides with the limit surface (702), and the cam (4) cannot rotate under the drive of external power; The upper limit position is: the cam (4) moves up and down until the cam shaft (401) is located at the uppermost part of the slide groove (201), at which time the cam surface (402) is in close contact with the outer circle of the bin (10), the long side of the cam limit (403) coincides with the limit surface (702), and the cam (4) cannot rotate under the drive of external power.

3. The method for using the external winding baling device with a built-in adjustable cam according to claim 2, characterized in that: During use, when the cam (4) moves upward under the drive of the lead screw (6), if the long side of the cam limit (403) does not overlap with the limit surface (702), the outer periphery of the cam limit (403) contacts the limit adjustment surface (701) and prevents the cam (4) from moving further upward, thereby preventing the cam surface (402) from colliding with the bundled component (1); only when the cam (4) is further rotated under the drive of an external power until the long side of the cam limit (403) overlaps with the limit surface (702), can the cam (4) move further upward under the drive of the lead screw (6); when the cam (4) moves to the uppermost end allowed by the slide groove (201) under the drive of the lead screw (6), the control of the deflection angle α is applied, and at this time, the cam surface (402) is in close contact with the outer circle of the bin (10) and will not collide with the moving bundled component (1).

4. The method for using the external winding baling device with a built-in adjustable cam according to claim 3, characterized in that: The upper limit position is in a normal state as follows: in the later stage of the bundling process, the cam (4) should be moved as close to the bin outer circle (10) as possible. When the cam (4) moves to the uppermost position allowed by the slide groove (201) under the drive of the lead screw (6), the cam surface (402) is in close contact with the bin outer circle (10); only a very small amount of material can pass between the cam surface (402) and the bundling component (1); in a normal state, the material stripping plate (9) is in close contact with the upper limit sensor (202) under the action of the spring, and the fillet with a radius of R2 is in close contact with the bin outer circle (10). Since the fillet with a radius of R2 is smaller than the cam, The fillet radius of the end of the surface (402) can effectively prevent the material from entering between the cam (4) or the material-dispensing plate (9) and the bundling component (1); the inner arc surface (904) can guide the material, and the force of the material flow on the inner arc surface (904) will generate an upward rotation torque on the material-dispensing plate (9), forming a larger combined force with the spring. At the same time, the downward extension line of the inner arc surface (904) does not intersect with the cam surface (402), which can prevent the material flow from entering between the circular arc surface (906) and the cam surface (402), while reducing the impact and extrusion of the material flow on the cam (4).

5. The method for using the external winding baling device with a built-in adjustable cam according to claim 4, characterized in that: The abnormal state of the upper limit position is: when, due to various reasons, the material squeezes into the space between the material-dispensing plate (9) and the bundling component (1), forcing the material-dispensing plate (9) to rotate downward, the outer arc surface (905) also plays a guiding role. When the material is large enough to make the limit plate (902) close to and trigger the lower limit sensor (203), an abnormal alarm will be issued, and the operation of the control device will be stopped by the manual or automatic system control.

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