External winding type bundling device with built-in adjustable cam

Abstract

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 faces and a cam limiting part, the four cam faces are arranged around the cam shaft in a rhombus shape and connected through fillets, and the cam faces are arranged on the cam shaft in a rhombus shape. 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 forming is accelerated, the grass core density is improved, the radial local density uniformity of grass bundles is improved, and the efficiency 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 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 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 densification degree, 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: an external winding baling device with a built-in adjustable cam, including a baling 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 2r, 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] 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

[0020] Figure 1 It 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 For the device Figure 1 ; Figure 5To hide the fixed warehouse wall, movable warehouse wall, lead screw drive block and limit fork Figure 2 ; Figure 6 Schematic diagram of the cam structure; Figure 7 It is the front view of the cam; Figure 8 It is a schematic diagram of the limit fork; Fig. 9 It is a schematic diagram of the material transfer plate; Fig.10 It is a schematic diagram of the full section of the material shifting plate; Fig.11 for Figure 4 An enlarged schematic diagram of the hidden lead screw during the limit adjustment stage at position I in the middle; Fig.12 for Figure 4 A full-section enlarged schematic diagram of the limit adjustment stage at position I in the middle; Fig.13 for Figure 4 The cam at position I in the middle moves to the uppermost normal state, and an enlarged schematic diagram of the hidden lead screw; Fig.14 for Figure 4 The full-section enlarged schematic diagram of the cam at position I in the middle is shown in the normal state when it moves to the uppermost position; Fig.15 for Figure 4 The cam at position I in the middle moves to the uppermost abnormal state, and an enlarged schematic diagram of the hidden lead screw; Fig.16 for Figure 4 The full-section enlarged schematic diagram of the cam at position I in the middle moving to the uppermost abnormal state; 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 DETAILED DESCRIPTION

[0021] The specific implementation of the present invention is further described in detail below with reference to the accompanying drawings: Figure 2-Figure 16 , 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.

[0022] 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.

[0023] 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.

[0024] 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.

[0025] The cam 4 includes a cam shaft 401 , a cam surface 402 , and a cam limiter 403 .

[0026] 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.

[0027] 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.

[0028] 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.

[0029] The lead screw drive block 5 is fixed to the outer side of the fixed bin wall 201. Compared with the whole 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.

[0030] 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.

[0031] like Fig.11 and Fig.12 The figure shows the limit adjustment stage: 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, 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 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 slot 201 under the drive of the lead screw 6, the control of the deflection angle α is added, and the cam surface 402 is in close contact with the outer circle 10 of the bin, and will not collide with the moving bundled component 1.

[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 and Fig.15 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] like Fig.13 and 14 The cam 4 is shown in the normal state when it moves to the uppermost position: 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 position 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 rotating 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 .

[0037] like Fig.15 and Fig.16 The cam 4 is shown in the abnormal state when it moves to the uppermost position: when, due to various reasons, the material squeezes into the space between the material-diverting plate 9 and the bundling component 1, the material-diverting plate 9 is forced 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 control device will stop working through the manual or automatic system control device.

Claims

1. An external winding baling device with a built-in adjustable cam, comprising a plurality of baling components (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 removal plate (9); the plurality of baling components (1) are arranged in a ring, and their inner surfaces form a bin outer circle (10); an opening at the lower left of the bin outer circle (10) where no baling components (1) are arranged is a feeding port (20); materials are continuously fed from the feeding port (20); the plurality of baling components (1) can drive the materials in the bin to rotate counterclockwise along the bin outer circle (10) under the action of external power and transmission, and the bin outer circle (10) is the maximum movement boundary of the materials; The cam (4) comprises a camshaft (401), a cam surface (402), and a cam limiter (403); the camshaft (401) is a through-shaft at the center of the cam (4), and is slidably matched with the slide groove (201), so that the cam (4) can move up and down in the slide groove (201) under the drive of an external power; at the same time, the external power acts on both ends of the camshaft (401), so that the cam (4) as a whole can rotate around the camshaft (401); the lead screw drive block (5) is fixed to the outer side surface of the fixed warehouse wall (2), the upper rod of the lead screw (6) is matched with the lead screw drive block (5), and the lower ring is rotatably matched with the camshaft (401), and the lead screw drive block (5) and the lead screw (6) are 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.

2. The external winding baling device with a built-in adjustable cam according to claim 1, characterized in that: Four cam surfaces (402) are arranged in a rhombus shape around a cam shaft (401) and connected by rounded corners; the cam limiter (403) is provided on the cam shaft (401) and is symmetrically arranged on both sides of the cam surface (402); the cam limiter (403) is a rounded rectangle, the distance between the two long sides is B, the distance from the farthest point on the rounded rectangle to the center is r, and with the center line of the cam shaft (401) as the center, the cam limiter (403) and the cam surface (402) have a deflection angle α as a whole.

3. The external winding baling device with a built-in adjustable cam according to claim 2, characterized in that: The fixed bin wall (2) is symmetrically arranged on both sides of the plurality of bundled components (1), and the structure thereon is also arranged in mirror symmetry 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 bin wall (2) is a fixed part and also serves as a frame to bear other components; the material shifting plate (9) that performs an upward rotational movement 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 shifting plate (9) can also perform a downward rotational movement, 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 an angle β.

4. The external winding baling device with a built-in adjustable cam according to claim 3, characterized in that: The movable warehouse wall (3) is symmetrically arranged on both sides of the plurality of bundled components (1), and is hinged to the fixed warehouse wall (2) at a warehouse door hinge point (0), and can rotate around the warehouse door hinge point (0) under the action of an external power to realize warehouse opening and closing.

5. The external winding baling device with a built-in adjustable cam according to claim 4, characterized in that: The limit fork (7) is fixed to the outer side surface of the screw drive block (5), 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 formed by connecting the limit adjustment surface (701) and the limit surface (702) in an arc, the diameter of the two limit adjustment surfaces (701) is 2r, and the width between the two limit surfaces (702) is B.

6. The external winding baling device with a built-in adjustable cam according to claim 5, characterized in that: The material-diverting plate (9) comprises 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); 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 a circular hole on a fixed bin wall (2); the limiting plate (902) is a fixed part at both ends of the material-diverting plate shaft (901); the spring hanging hole (903) is at an end of the limiting plate (902) away from the material-diverting plate shaft (901); and the spring hanging hole (903) is at an end of the limiting plate (902) away from the material-diverting plate shaft (901). A tension spring is connected between the connection hole (903) and the spring connection plate (204) so ​​that the material-shifting 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-shifting plate shaft (901), the inner arc surface (904) and the outer arc surface (905) both have a radius of R3, and are connected by a fillet with a radius of R2, and the fillet with a radius of R2 is smaller than the fillet radius of the end of the cam surface (402).

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