Method for using an external winding baling device with a built-in adjustable cam

Abstract

The present invention discloses a method for using an external winding baling device with a built-in adjustable cam, comprising a bundling component, a fixed bin wall, a movable bin wall, a cam, a screw driving block, a screw, a limit fork, and a material stripping plate. The cam comprises a cam shaft, a cam surface, and a cam limiter. The four cam surfaces are arranged in a rhombus shape around the cam shaft and are connected with rounded corners. The material stripping plate comprises a material stripping plate shaft, a limit plate, a spring hanging hole, an inner arc surface, an outer arc surface, and a circular arc surface. The rotation and translational motion of the cam can be reasonably utilized to reduce the throwing and dispersion effect of materials in the early stage of bundling, accelerate the formation of grass cores and increase the density of grass cores, and improve the uniformity of the radial local density of the straw bale. The limit fork and the material stripping plate structure also improve the safety of the device during use.

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] Balers can bundle loose forage, feed, straw, soybean meal, cotton wool, and other agricultural by-products into denser, more regularly shaped bales. Combined with film wrapping equipment, they can also be used to create silage bales. Balers improve the harvesting, storage, and utilization efficiency of forage and crop waste, reduce mechanization costs, and play a vital role in agricultural harvesting. External wrap balers are a major type of round baler. Because the baling components are arranged around the baling bin, they cannot effectively compact the material fed into the bale during the initial bale formation process. This results in an uneven density distribution of the final bale, with a loose interior and tight exterior. Furthermore, this uneven density distribution of the material can lead to variations in the oxygen content within the silage bale, further impacting the fermentation quality of the silage. Therefore, the uneven density distribution of bales produced by external wrap round balers limits further improvements in overall bale density and bale fermentation quality.

[0003] Figure 1 This is a typical arrangement of the baling components of an external winding round baler in the prior art and the movement of the material in the initial stage of baling. In fact, it is the rotational movement of the material in the baling chamber. Figure 2 Typical images obtained during a rotation test to reference the dimensions and motion parameters of an external wrapping round baler. Both images show that during the initial bale formation phase, the fed material, driven by the baling components, rises along the outer perimeter of the baling chamber (a), followed by a dispersed, ejected stream (b), with a stable hollow area or material cluster forming between the two areas (c). The ejected motion in the upper left (when viewing the figure from the front) loosens the material, hindering its accumulation and compaction during the bale formation process. Therefore, limiting this ejected, dispersed flow is key to solving the problem. Summary of the Invention

[0004] In response to the shortcomings of the existing technology, 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 during the baling process, accelerate material accumulation and improve the degree of densification, and further increase 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 solution: 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, their inner surface forming the outer circle of the bin. The opening on the lower left side of the outer circle, where no bundling components are located, serves as the feed port. Material is continuously fed through the feed port. Driven by external power and transmission, the bundling components drive the material in a counterclockwise rotational motion along the outer circle, which represents the maximum movement boundary of the material.

[0007] The fixed silo walls are symmetrically arranged on both sides of the bundled components. The structures on them are also arranged in a mirror-symmetrical manner about the bundled components, including the chute, upper limit sensor, lower limit sensor, and spring mounting plate. The fixed silo walls are fixed components and also serve as a frame to support other components.

[0008] The movable walls are symmetrically arranged on either side of the bundling components and hinged to the fixed walls at the door hinge. They can rotate around the door hinge under external power to open and close the bunker. The curves of the movable walls in contact with the fixed walls are identical, ensuring a completely sealed bunker when closed.

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

[0010] The camshaft is a shaft that runs through the center of the cam and slides with the chute, allowing the cam to move up and down in the chute under external power. At the same time, external power acts on both ends of the camshaft, causing the cam as a whole to rotate around the camshaft.

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

[0012] The cam limiters are located on the camshaft and symmetrically arranged on either side of the cam surface. The cam limiters are rounded rectangles with a distance B between their long sides and a distance r between the farthest point on the rounded rectangle and its center. The cam limiters are rotated relative to the cam surface at an angle α, centered on the camshaft's centerline.

[0013] The screw drive block is fixed to the exterior of the fixed bin wall, which is relatively independent of the entire device. The upper rod of the screw engages with the screw drive block, while the lower ring rotates in conjunction with the camshaft. The screw drive block and the screw are also symmetrically arranged on either side of the bundled components. The screw drive block receives external control signals and drives the screw up and down, which in turn drives the cam up and down.

[0014] The limit fork is fixed to the outer side of the screw drive block. Compared to the entire device, the limit fork is fixed to the screw drive block at the top and has a special-shaped opening slot at the bottom. It is formed by connecting 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-diverting plate comprises a material-diverting plate shaft, a limiting plate, a spring hanging hole, an inner arc surface, an outer arc surface, and a circular arc surface.

[0016] The stock board shaft is a shaft passing through the center of the stock board and is in rotational fit with the round hole on the fixed bin wall.

[0017] The limit plate is the fixed part at both ends of the stock board shaft. The spring hanging hole is at one end of the limit plate away from the stock board shaft. A tension spring is hung between the spring hanging hole and the spring hanging plate, so that the stock board rotates upward as much as possible. The inner arc surface, the outer arc surface and the arc surface are connected end to end in sequence. The radius of the arc surface is R and it has the same central axis as the stock board shaft. The radii 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 at the end of the cam surface.

[0018] The stock board rotating upward can move at most until the limit plate closely adheres to and triggers the upper limit sensor. Under the action of other forces, the stock board can also rotate downward and move at most until the limit plate closely adheres to and triggers the lower limit sensor. Between the upper limit sensor and the lower limit sensor, the range where the limit plate is allowed to rotate is an angle β.

[0019] A use method of an externally wound baling device with an internally adjustable cam includes the following steps:

[0020] S1: Start the device. A number of bundling components move under external drive and transmission, and a rotational speed of n0 is formed at the outer circle of the bin, and the direction is counterclockwise.

[0021] S2: Feed a small amount of materials from the feeding port. The material flow cannot touch the outer rotating circle of the cam surface at the lower limit position, and at this time the cam is stationary.

[0022] S3: Continue to feed the materials. The material flow enters the outer rotating circle of the cam surface at the lower limit position but cannot touch the inner rotating circle. At this time, the cam rotates counterclockwise at a rotational speed of n1, satisfying n1 < n0. At this time, the cam rotates in reverse at a lower speed, which can effectively block the dispersing and throwing effect.

[0023] S4: Continue to feed the materials. The material flow enters the outer rotating circle of the cam surface at the lower limit position and at the same time has touched the inner rotating circle. At this time, the cam rotates counterclockwise at a rotational speed of n1, satisfying n1 < n0. At the same time, the cam moves upward under the drive of the lead screw, keeping the material flow not exceeding the inner rotating circle but still within the range of the outer rotating circle, so as to prevent the materials from flowing through the cam surface at the upper left part. [[ID=No ]]

[0024] S5: Continue to feed the materials. When the cam moves upward to the limit adjustment position, continue to rotate the cam until the long side of the cam limit coincides with the limit surface, and then the cam continues to move upward under the drive of the lead screw and stops rotating at the same time.

[0025] S6: Continue to feed the materials. When the cam moves upward to the upper limit position, stop feeding. At this time, the materials in the bin form a preliminary grass core.

[0026] The S7 cam moves downward driven by the lead screw, continuously compressing the diameter of the grass core and increasing the grass core density, until it moves to the limit adjustment position and stops moving downward;

[0027] The S8 cam rotates clockwise at a speed of n1, and the cam surface repeatedly squeezes the formed straw core to reduce internal stress and, to a certain extent, reduce the local density unevenness in the radial direction of the straw core;

[0028] 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 grass core density;

[0029] 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, feeding continues and the cam moves upward;

[0030] S11 repeats S5;

[0031] 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.

[0032] 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.

[0033] S14 repeats S1-S13 until the operation stops and the device is shut down;

[0034] 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 working after maintenance is completed.

[0035] The beneficial effects of the present invention are:

[0036] 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 properly used to reduce the dispersion effect of throwing in the early stage of bale formation, accelerate the formation of straw cores and increase straw core density, and improve the uniformity of the radial local density of straw bales;

[0037] 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 during use;

[0038] 3. When, for various reasons, materials squeeze into the space between the stripper plate and the bundled components, forcing the stripper plate to rotate downward, when the amount of materials is large enough to make the limit plate close to it 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

[0039] Figure 1 This 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.

[0040] Figure 2 Typical images obtained from the rotation test based on the dimensions and motion parameters of the external wrapping round baler;

[0041] Figure 3 Schematic diagram of the device structure;

[0042] Figure 4 This is a front view of the device;

[0043] Figure 5 Schematic diagram of the cam;

[0044] Figure 6 It is the front view of the cam;

[0045] Figure 7 Schematic diagram of the limit fork;

[0046] Figure 8 Schematic diagram of the material transfer plate;

[0047] Figure 9 This is a full cross-sectional diagram of the material shifting plate;

[0048] Figure 10 It is a schematic diagram of the cam being at the lower limit position;

[0049] Figure 11 It is a schematic diagram of the cam being in the middle position with the two cam surfaces being in the vertical direction;

[0050] Figure 12 is a schematic diagram of the cam being in the limit adjustment position;

[0051] Figure 13 for Figure 4 The limit adjustment position at point I in the middle shows an enlarged diagram of the hidden lead screw;

[0052] Figure 14 for Figure 4 A full-section enlarged schematic diagram of the limit adjustment position at point I in the middle;

[0053] Figure 15 It is a schematic diagram of the cam being at the upper limit position;

[0054] Figure 16 for Figure 4 The upper limit position at point I in the middle is in normal state, with an enlarged schematic diagram of the hidden screw;

[0055] Figure 17 for Figure 4 A magnified schematic diagram of the full section at the upper limit position in the middle I in normal state;

[0056] Figure 18 for Figure 4 The upper limit position at point I is abnormal, and the enlarged diagram of the hidden screw;

[0057] Figure 19 for Figure 4 A full-section enlarged schematic diagram of the abnormal state of the upper limit position at point I in the middle;

[0058] In the figure, the accompanying drawings are marked as follows:

[0059] 0 Warehouse door hinge point 1 Bundled parts 2 Fixed warehouse wall 201 chute 202 Upper limit sensor 203 Lower limit sensor 204 Spring mounting plate 3 Movable 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 Diverter plate 901 Diverter 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 Rotating outer circle 40 Rotating inner circle DETAILED DESCRIPTION

[0060] The specific embodiments of the present invention are described in further detail below with reference to the accompanying drawings: Figure 2-Figure 19 ,

[0061] A method for using an external winding baling device with a built-in adjustable cam includes a baling component 1, a fixed bin wall 2, a movable bin wall 3, a cam 4, a screw drive block 5, a screw 6, a limit fork 7, and a material shifting plate 9.

[0062] The bundling components 1 are arranged in a ring, their inner surface forming a bin outer circle 10. The opening to the lower left of bin outer circle 10, where no bundling components 1 are located, serves as a feed port 20. Material is continuously fed through feed port 20. Driven by external power and transmission, the bundling components 1 drive the material in a counterclockwise rotational motion along bin outer circle 10. These components, in turn, limit the volume increase of the bale during the final stages of bundling, thereby transforming the bale from a loose state to a dense state. Bin outer circle 10 represents the maximum movement boundary for the material.

[0063] The fixed warehouse wall 2 is symmetrically arranged on both sides of the bundled components 1. The structure on it is also arranged in a mirror-symmetrical manner with respect to the bundled components 1, including the slide 201, the upper limit sensor 202, the lower limit sensor 203, and the spring mounting plate 204. The fixed warehouse wall 2 is a fixed component and also serves as a frame to support other components.

[0064] The movable walls 3 are symmetrically arranged on either side of the bundling components 1 and hinged to the fixed walls 2 at the door hinge point 0. They can rotate about the door hinge point 0 under external power to open and close the bundling compartment. The curves of the movable walls 3 and the fixed walls 2 at their contact points are identical, ensuring a completely sealed bundling compartment when closed.

[0065] The cam 4 includes a cam shaft 401 , a cam surface 402 , and a cam limiter 403 .

[0066] The camshaft 401 is a shaft that runs through the center of the cam 4 and is in sliding engagement with the chute 201, enabling external power to drive the cam 4 up and down in the chute 201. Simultaneously, external power acting on both ends of the camshaft 401 can cause the cam 4 to rotate around the camshaft 401.

[0067] The four cam surfaces 402 are arranged in a diamond shape around the camshaft 401 and connected by rounded corners. The cam surfaces 402 on the cam 4 and the translation, rotation, or combined motion of the cam 4 itself can exert a forced interference effect on the movement and deformation of loose material, thrown material, and the bale during use. This is a core working component that reduces the initial dispersion of thrown material, accelerates the formation of the straw core, increases the straw core density, and improves the uniformity of the radial local density of the straw bale.

[0068] The cam stoppers 403 are located on the camshaft 401 and are symmetrically arranged on either side of the cam surface 401. The cam stoppers 403 are rounded rectangles with a distance B between their long sides and a distance r between the farthest point on the rounded rectangle and its center. With the centerline of the camshaft 401 as the center, the cam stoppers 403 and the cam surface 402 are rotated at an angle α.

[0069] The screw drive block 5 is fixed to the exterior of the fixed bin wall 2. Compared to the entire device, the upper rod of the screw 6 engages with the screw drive block 5, while the lower ring rotates in conjunction with the camshaft 401. The screw drive block 5 and the screw 6 are also symmetrically arranged on either side of the bundled components 1. The screw drive block 5 receives external control signals and drives the screw 6 up and down, further driving the cam 4 up and down.

[0070] The limit fork 7 is fixed to the outer side of the screw drive block 5. Compared to the entire device, the limit fork 7 is fixed to the screw drive block 5 at the top and has a special-shaped opening at the bottom. It is formed by a limit adjustment surface 701 and a limit surface 702 connected by an arc. The diameter of the two limit adjustment surfaces 701 is 2r, and the width between the two limit surfaces 702 is B.

[0071] 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 .

[0072] The stripper plate shaft 901 is an axis that passes through the center of the stripper plate 9 and rotates with the circular hole on the fixed warehouse wall 2.

[0073] The limit plate 902 is a fixed part at both ends of the stripper plate shaft 901, and the spring mounting hole 903 is at one end of the limit plate 902 away from the stripper plate shaft 901. A tension spring is mounted between the spring mounting hole 903 and the spring mounting plate 204, so that the 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 stripper plate shaft 901. The radius 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.

[0074] like Figure 13 、 Figure 16 、 Figure 18 As shown, the upward rotational movement of the stripper plate 9 can move up to the point where the limit plate 902 abuts and triggers the upper limit sensor 202. Under the action of other forces, the stripper plate 9 can also move downward to the point where the limit plate 902 abuts and triggers the lower limit sensor 203. The range of rotation allowed for the limit plate 902 between the upper limit sensor 202 and the lower limit sensor 203 is an angle β.

[0075] For ease of description, define:

[0076] Lower limit position: Figure 10 As shown, the cam 4 moves up and down until the cam shaft 401 is located at the lowermost part of the slide slot 201;

[0077] Lower transition position: Figure 11 As shown, the cam 4 moves up and down to between the lower limit position and the limit adjustment position;

[0078] 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 external power drive;

[0079] Upper transition position: the cam 4 moves up and down to between the upper limit position and the limit adjustment position. At this time, the long side of the cam limit 403 coincides with the limit surface 702, and the cam 4 cannot rotate under external power.

[0080] 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 groove 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 limit 403 coincides with the limit surface 702. The cam 4 cannot rotate under external power drive.

[0081] A method for using an external winding baling device with a built-in adjustable cam comprises the following steps:

[0082] S1: Start the device. A number of bundled components 1 move under external drive and transmission, forming a rotational speed of n0 at the outer circle 10 of the bin. When observed from Figure 10 the perspective, the direction is counterclockwise;

[0083] S2: Feed a small amount of material into the feeding port 20. When observed from Figure 10 the perspective, the material flow cannot touch the outer rotating circle 30 of the cam surface 402 at the lower limit position. At this time, the cam 4 is stationary;

[0084] S3: Continue to feed the material. When observed from Figure 10 the perspective, the material flow enters the outer rotating circle 30 of the cam surface 402 at the lower limit position but cannot touch the inner rotating circle 40. At this time, the cam rotates counterclockwise at a rotational speed of n1, where n1 < n0. At this time, the cam 4 rotates in reverse at a lower speed, which can effectively block the dispersing and throwing effect;

[0085] S4: Continue to feed the material. When observed from Figure 10 the perspective, the material flow enters the outer rotating circle 30 of the cam surface 402 at the lower limit position and has already touched the inner rotating circle 40. At this time, the cam 4 rotates counterclockwise at a rotational speed of n1, where n1 < n0. At the same time, the cam 4 moves upward under the drive of the lead screw 6 to keep the material flow from exceeding the inner rotating circle 40 but still within the range of the outer rotating circle 30 to prevent the material from flowing through the upper left cam surface 402;

[0086] S5: Continue to feed the material. When the cam 4 moves upward to the limit adjustment position, continue to rotate the cam 4 until the long side of the cam limit 403 coincides with the limit surface 702. Then, the cam 4 continues to move upward under the drive of the lead screw 6 and stops rotating at the same time;

[0087] 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; [[ID=2 + 5]]

[0088] S7: The cam 4 moves downward under the drive of the 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 the cam 4 stops moving downward;

[0089] S8: The cam 4 rotates clockwise at a rotational speed of n1, and the cam surface 402 repeatedly squeezes the formed grass core to reduce the internal stress and, to a certain extent, reduce the local density non-uniformity in the radial direction of the grass core;

[0090] S9: The cam 4 moves downward under the drive of 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;

[0091] S10: When the cam 4 moves downward to the set position (which can be the lower limit position or the lower transition position) under the drive of the lead screw 6, continue to feed the material, and the cam 4 moves upward;

[0092] S11 repeats S5;

[0093] 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.

[0094] 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 straw bale.

[0095] S14 repeats S1-S13 until the operation stops and the device is shut down;

[0096] 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 system will stop working through manual or automatic system control devices, and continue working after maintenance is completed.

[0097] During operation, when the cam 4 moves upward under the drive of the lead screw 6, if the long side of the cam stop 403 does not overlap the stop surface 702, the outer periphery of the cam stop 403 contacts the stop adjustment surface 701, preventing further upward movement of the cam 4 and preventing the cam surface 402 from colliding with the bundling component 1. Only when the cam 4 rotates further under external power until the long side of the cam stop 403 overlaps the stop 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 position allowed by the slide slot 201 under the drive of the lead screw 6, and the deflection angle α is applied, the cam surface 402 is in close contact with the bin outer circle 10 and does not collide with the moving bundling component 1.

[0098] like Figure 16 and 17The figure shows the normal state of the upper limit position: during use, especially in the later stage of the bundling process, the cam 4 should be kept as close to the outer circle 10 of the bin as possible. When the cam 4 moves to the uppermost position allowed by the chute 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 material and even damage the device components. Under normal conditions, under the action of the spring, the limit plate 902 of the material stripper 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 material from entering between the cam 4 or the material stripper plate 9 and the bundling component 1. The inner arc surface 904 can guide the material. The force of the material flow on the inner arc surface 904 will generate an upward rotation torque on the material stripper plate 9, forming a greater 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 .

[0099] like Figure 18 and Figure 19 The diagram shows an abnormal state at the upper limit position: For various reasons, material can squeeze into the space between the stripper plate 9 and the bundling unit 1, forcing the stripper plate 9 to rotate downward. The outer curved surface 905 also serves as a flow diversion mechanism. When the material volume is sufficient to force the limit plate 902 against the bundling unit 1 and trigger the lower limit sensor 203, an abnormality alarm is sounded, and the system control device is either manually or automatically stopped.

Claims

1. Method of 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), with the direction being counterclockwise. S2. Feed a small amount of material through the feed inlet (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, where 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, where n1 < n0. At the same time, the cam (4) moves upward under the drive of the lead screw (6), keeping the material flow from 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) until the long side of the cam limit (403) coincides with the limit surface (702). Then, 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. S!3. 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 shut down. S15. During use, 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 maintenance, 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 said lower limit position 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 rotated together, and the cam (4) can rotate under external power drive; 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 external power drive; 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 external power drive.

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 coincide 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 the external power until the long side of the cam limit (403) coincides 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 does 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 normal state of the upper limit position is: in the late stage of the bundling process, the cam (4) should be as close to the outer circle of the bin (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 outer circle of the bin (10); only a very small amount of material can pass between the cam surface (402) and the bundling component (1); in the normal state, the material stripping plate (9) is under the action of the spring, and the limit plate (902) 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 of the bin (10). Since the fillet with a radius of R2 is smaller than the cam, the limit plate (902) is in close contact with the upper limit sensor (202). 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 bundled 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-diverting plate (9) and the bundled component (1), forcing the material-diverting plate (9) to rotate downward, the outer arc surface (905) also plays a diversion 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 human or automatic system.

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