Discharge bin assembly

Abstract

This utility model belongs to the technical field of sorting in agricultural operations and transportation, specifically relating to a discharge bin assembly. It includes a hollow, frustum-shaped discharge bin body, comprising upper and lower halves. The smaller end of the discharge bin body is connected to an axially extending straight cylindrical section, also bisected, comprising an upper cylindrical section connected to the upper half and a lower cylindrical section connected to the lower half. Multiple fixed sieve holes are perforated in the wall of the lower cylindrical section, and a movable sieve plate, coaxial and attached to the inner wall of the lower cylindrical section, is provided. Multiple sieve plate through holes are perforated on the movable sieve plate. The discharge bin body also includes a driving mechanism that drives the movable sieve plate to slide axially back and forth on the lower cylindrical section. This discharge bin assembly incorporates a threshing-promoting structure. Through the reciprocating sliding of the movable sieve plate, it actively contacts the grain stalks, causing any remaining grains to fall off and exit through the interconnected sieve holes, thereby improving the threshing rate.

Description

Technical Field

[0001] This utility model belongs to the technical field of sorting in agricultural operations and transportation, and specifically relates to a discharge bin assembly. Background Technology

[0002] Combine harvesters comprise multiple functional units for moving crops within the equipment. They can perform various functions such as cutting, separating ears of grain, separating husks, and discharging grain, as well as transporting crops between these units. They are highly integrated and suitable for large-scale grain harvesting operations. See the technical solution disclosed in CN112547474A. The rotary threshing unit in the combine harvester separates the grains from the ears of grain. The rotary threshing unit has a drum with an internal horizontal channel. A screw conveyor is installed inside the drum. Combined with the rotation of the screw conveyor, the cut grains enter from the inlet end of the drum. Through the relative rotation and crushing of the inner and outer walls of the drum and the screw conveyor, the grains detach from the ears of grain and fall through the sieve-like mesh on the drum, achieving separation and threshing. The stalks of the separated grains are then discharged from the outlet end of the drum. The two ends of the roller are usually connected to extended feed bins and discharge bins to assist in the feeding and discharging of the roller, making the grain feeding and discharging of the roller smoother and easier to connect with the preceding and following processes. Currently, the discharge bin is just a cylindrical structure connected to the tail end of the roller, which is simple in structure. After the grain stalks are crushed by the relative rotation of the roller and the screw conveyor, there are usually still grains that have not fallen off. If the grains can be further separated in the discharge bin stage, the threshing rate can be improved. It is necessary to optimize and improve the existing discharge bin structure. Summary of the Invention

[0003] In view of the above-mentioned shortcomings of the prior art, the technical problem to be solved by this utility model is to provide a discharge bin assembly, so as to avoid the problem that the discharge bin structure is relatively simple and cannot help improve the threshing rate.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: The discharge bin assembly includes a hollow, frustum-shaped discharge bin body, which comprises an upper bin and a lower bin that are split in half, and the upper bin and the lower bin are interlocked to form the discharge bin body; the small end of the discharge bin body is connected to an axially extending straight cylindrical section, which is also split in half and includes an upper cylindrical section connected to the upper bin and a lower cylindrical section connected to the lower bin. Multiple fixed sieve holes are provided through the cylinder wall of the lower half-cylinder, and a movable sieve plate is provided on the inner wall of the lower half-cylinder, which is coaxial with and attached to the movable sieve plate. Multiple sieve plate through holes are provided through the movable sieve plate. The discharge hopper body is also equipped with a drive mechanism, which drives the movable screen plate and drives the movable screen plate to slide back and forth axially on the lower half-cylinder. During the back and forth sliding process, at least some of the fixed screen holes and the screen plate through holes can be aligned and connected or misaligned and closed.

[0005] To further improve the above technical solution, the plurality of fixed sieve holes are arranged at equal intervals in the circumferential and axial directions to form an array; the plurality of sieve plate through holes are arranged one-to-one with the plurality of fixed sieve holes.

[0006] Furthermore, the movable screen plate is an arc-shaped plate with a minor arc, and transmission blocks are respectively protruded and connected to the outer surfaces at both ends of its circumference. A sliding groove is provided through the cylinder wall of the lower semi-cylinder for the transmission blocks to pass through. In the axial direction of the lower semi-cylinder, the length of the sliding groove is greater than that of the transmission block so that the transmission block can slide along the axial direction. The driving mechanism is located on the outer wall of the lower semi-cylinder and drives the transmission blocks.

[0007] Furthermore, a coaxial limiting arc strip is protruding and connected to the inner wall of the lower semi-cylinder. The limiting arc strip is located at one end of the lower semi-cylinder near the lower half-compartment. The radial thickness of the limiting arc strip is greater than that of the movable screen plate. A coaxial receiving slot is recessed on the end face of the limiting arc strip facing the movable screen plate. The radial width of the receiving slot corresponds to the radial thickness of the movable screen plate. The corresponding end of the movable screen plate is slidably connected in the receiving slot.

[0008] Furthermore, the inner edge of the limiting arc strip facing the end face of the moving screen plate is chamfered, and one side of the chamfer extends to the opening of the receiving slot.

[0009] Compared with the prior art, the present invention has the following beneficial effects: 1. The discharge bin assembly of this utility model is equipped with a threshing-promoting structure. By moving the screen plate back and forth, it actively contacts the grain stalk, causing the remaining grains on it to fall off further and fall out through the aligned and connected screen holes, thereby improving the threshing rate.

[0010] 2. The discharge bin assembly of this utility model can adjust the stroke of the drive mechanism to drive the moving screen plate to slide back and forth, and can also realize the size of the hole when the fixed screen hole and the screen plate through hole are aligned and connected, so as to adapt to crops with different grain sizes. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the discharge hopper assembly in a specific embodiment; Figure 2 for Figure 1 The left view; Figure 3 This is a perspective view of the moving sieve plate in a specific embodiment; Figure 4This is a perspective view of the lower half of the discharge hopper body in a specific embodiment; Figure 5 for Figure 1 Sectional view of AA (partial, enlarged); Figure 6 for Figure 2 Sectional view of BB; The components include: discharge hopper body 1, upper half hopper 11, lower half hopper 12, upper half cylinder 111, lower half cylinder 121, fixed screen hole 122, sliding groove 123, limiting arc strip 124, receiving slot 125, limiting strip 126, chamfer 127, raised edge 13, movable screen plate 2, screen plate through hole 21, transmission block 22, drive mechanism 3, lead screw 31, guide rod 32, nut seat 33, and assembly box 34. Detailed Implementation

[0012] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely represents selected embodiments of the utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0013] It should be noted that similar reference numerals and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the figures, or the orientation or positional relationship commonly used when the product is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance. In addition, the terms "horizontal," "vertical," etc., do not indicate that the component is required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted. In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0014] Please see Figures 1-3The discharge bin assembly in a specific embodiment includes a hollow, frustum-shaped discharge bin body 1. The discharge bin body 1 comprises an upper bin 11 and a lower bin 12, which are interlocked to form the discharge bin body 1. A straight cylindrical section extending axially is connected outward from the small end of the discharge bin body 1. This straight cylindrical section is also divided in half and includes an upper cylindrical section 111 connected to the upper bin 11 and a lower cylindrical section 121 connected to the lower bin 12. Multiple fixed screen holes 122 are perforated through the wall of the lower cylindrical section 121. The inner wall of the lower cylindrical section 121... A movable sieve plate 2 is provided, coaxial and attached to the sieve. Multiple sieve plate through holes 21 are provided on the movable sieve plate 2. A drive mechanism 3 is also provided on the discharge hopper body 1. The drive mechanism 3 drives and connects to the movable sieve plate 2, causing the movable sieve plate 2 to slide axially back and forth on the lower semi-cylinder 121. During the back and forth sliding process, at least some of the fixed sieve holes 122 and the sieve plate through holes 21 can be aligned and connected or misaligned and closed. This allows the movable sieve plate 2 to actively contact the grain stalks, causing any remaining grains to fall off and exit through the aligned sieve holes into a designated container below. In addition to the movable sieve plate 2 contacting the grain stalks to further promote threshing, the discharge hopper assembly is equipped with a corresponding threshing-promoting structure. In the rotary threshing equipment, the corresponding section of the screw conveyor can also be further equipped with protruding blades to further beat the grain stalks that have been crushed by the rotating drum in this conveying section, comprehensively promoting threshing and achieving an improved threshing rate. By adjusting the stroke of the drive mechanism 3 to drive the moving sieve plate 2 to reciprocate, the aperture size when the fixed sieve hole 122 and the sieve plate through hole 21 are aligned and connected can be adjusted, thus adapting to crops with different seed sizes. The specific position of the drive mechanism 3 is not limited, as long as it does not interfere with the conveying of crops. The moving sieve plate 2 can be in the form of a whole cylinder, with seeds falling only at the lower part, so the sieve plate through hole 21 can be opened only at the lower part.

[0015] Please continue reading Figure 1 and Figure 3 The plurality of fixed sieve holes 122 are equidistantly spaced in the circumferential and axial directions of the lower semi-cylinder 121 to form an array; the plurality of sieve plate through holes 21 are arranged one-to-one with the plurality of fixed sieve holes 122, also known as the corresponding array, so that the sieve plate through holes 21 can be aligned and connected with the fixed sieve holes 122 one-to-one or completely misaligned and closed during the reciprocating sliding process.

[0016] To reduce material usage in the movable screen plate 2, a solid cylindrical form is not used. In this embodiment, the movable screen plate 2 is an arc-shaped plate with a minor arc. Transmission blocks 22 are protruding and connected to the outer surfaces at both ends of its circumference. A sliding groove 123 is formed through the wall of the lower semi-cylinder 121 for the transmission blocks 22 to pass through. The length of the sliding groove 123 is greater than that of the transmission blocks 22 in the axial direction of the lower semi-cylinder 121, allowing the transmission blocks 22 to slide axially. The drive mechanism 3 is located on the outer wall of the lower semi-cylinder 121 and drives the transmission blocks 22. Thus, the movable screen plate 2 is formed in the lower part where it plays a major working role. The drive mechanism 3 can be set on one side or symmetrically on both sides, depending on the arc length of the movable screen plate 2, as long as it can effectively drive the movable screen plate 2 to slide back and forth. The drive mechanism 3 is located on the outer side, reducing interference with the transport of crops.

[0017] Please see Figure 4 and Figure 6 A coaxial limiting arc strip 124 is protruding and connected to the inner wall of the lower semi-cylinder 121. The limiting arc strip 124 is located at the end of the lower semi-cylinder 121 near the lower half-compartment 12. The radial thickness of the limiting arc strip 124 is greater than that of the movable screen plate 2. A coaxial receiving slot 125 is recessed on the end face of the limiting arc strip 124 facing the movable screen plate 2. The radial width of the receiving slot 125 corresponds to the radial thickness of the movable screen plate 2. The corresponding end of the movable screen plate 2 is slidably connected in the receiving slot 125. When the driving mechanism 3 drives the movable screen plate 2 to slide back and forth, the end of the movable screen plate 2 does not come out of the receiving slot 125. In this way, the installation and use of the movable screen plate 2 can be made more stable. In actual operation, when the discharge bin assembly is connected to the drum of the rotary threshing unit, the drum also has an overlapping edge similar to the upper edge of the slot 125 that overlaps with the other end of the moving screen plate 2, so that both ends of the moving screen plate 2 are stably connected, and at the same time, no grains will affect the reciprocating sliding of the moving screen plate 2.

[0018] The inner edge of the limiting arc strip 124 facing the moving screen plate 2 is provided with a chamfer 127. One side of the chamfer 127 extends to the opening of the receiving slot 125, which can reduce the obstruction to the forward conveying of grain stalks and avoid jamming.

[0019] In implementation, corresponding to both ends of the movable screen plate 2 in the circumferential direction, horizontal limiting strips 126 can also be connected to the inner wall of the lower semi-cylinder 121 to restrict the movable screen plate 2 in the circumferential movement dimension. The drive mechanism 3 can be a telescopic cylinder that drives the movable screen plate 2 (transmission block 22) through a horizontal telescopic rod. In this embodiment, please refer to... Figure 1 , Figure 4 and Figure 5The interlocking surfaces of the upper half-chamber 11 and the lower half-chamber 12, and the interlocking surfaces of the upper half-cylinder 111 and the lower half-cylinder 121, all extend outward to form protruding edges 13, which facilitate the interlocking connection of the upper and lower parts of the discharge chamber body 1, which are split in half. An assembly box 34 is connected below the protruding edge 13 on the outer side of the lower half-cylinder 121. The assembly box 34 is equipped with a screw drive structure, including a motor (not shown in the figure). The motor drives a rotatable screw 31 (screw), two fixed guide rods 32, and a nut seat 33 is slidably sleeved on the two guide rods 32 and threadedly connected to the screw 31. When the motor drives the screw 31 to rotate in both directions, the corresponding reciprocating sliding of the nut seat 33 causes the transmission block 22 to pass through the sliding groove 123 and connect with the nut seat 33, so as to drive the transmission block 22 and the moving screen plate 2 through the nut seat 33.

[0020] During manufacturing, the lower half-chamber 12, the lower half-cylinder 121, and the corresponding protruding edge 13 are typically integrally formed. The protruding edge 13 has through holes running vertically to facilitate connection via fasteners (such as bolting). The limiting arc strip 124 and the horizontal limiting strip 126 can be added as an add-on or integrally formed on the lower half-cylinder 121, depending on the manufacturing process. If cost reduction is required to create different product series, a simpler model version without the limiting arc strip 124 and the horizontal limiting strip 126 can be developed.

[0021] During assembly, the lower half formed by the lower half-chamber 12 and the lower half-cylinder 121 is fastened to the upper half formed by the upper half-chamber 11 and the upper half-cylinder 111. The protruding edges 13 are interlocked and connected by fasteners to maintain the overall shape of the discharge hopper body 1. Based on the calculated process parameters and stroke, the drive mechanism 3 is connected to the lower part of the protruding edge 13 through the assembly box 34, with its position corresponding to the sliding groove 123. The moving screen plate 2 is slidably attached to the inner wall of the lower half-cylinder 121. The transmission block 22 is connected to the outer surfaces of the two circumferential ends of the moving screen plate 2 through the sliding groove 123 and fastened by bolting. The lower surface of the transmission block 22 and the upper surface of the nut seat 33 of the drive mechanism 3 have mortise and tenon structures to achieve linkage (or they can be fixed by fasteners). Then, the assembled feed hopper assembly is connected to the tail end of the drum of the rotary threshing unit.

[0022] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A discharge bin assembly, comprising a hollow, frustum-shaped discharge bin body, the discharge bin body comprising an upper bin and a lower bin divided in half, the upper bin and the lower bin being interlocked to form the discharge bin body; characterized in that: The small end of the discharge hopper body is connected to a straight cylindrical section extending along the axial direction. The straight cylindrical section is also split in half and includes an upper cylindrical section connected to the upper half of the hopper and a lower cylindrical section connected to the lower half of the hopper. Multiple fixed sieve holes are provided through the cylinder wall of the lower half-cylinder, and a movable sieve plate is provided on the inner wall of the lower half-cylinder, which is coaxial with and attached to the movable sieve plate. Multiple sieve plate through holes are provided through the movable sieve plate. The discharge hopper body is also equipped with a drive mechanism, which drives the movable screen plate and drives the movable screen plate to slide back and forth axially on the lower half-cylinder.

2. The discharge bin assembly according to claim 1, characterized in that: The plurality of fixed sieve holes are equally spaced in the circumferential and axial directions to form an array; the plurality of sieve plate through holes are arranged one-to-one with the plurality of fixed sieve holes.

3. The discharge bin assembly according to claim 1, characterized in that: The movable screen plate is an arc-shaped plate with a slight arc. Transmission blocks are protruded and connected to the outer surfaces of both ends of the circumference. A sliding groove is opened through the cylinder wall of the lower half-cylinder for the transmission blocks to pass through. The length of the sliding groove is greater than that of the transmission block in the axial direction of the lower half-cylinder so that the transmission block can slide along the axial direction. The driving mechanism is located on the outer wall of the lower half-cylinder and drives the transmission blocks.

4. The discharge bin assembly according to claim 1, characterized in that: The inner wall of the lower semi-cylinder is connected to a coaxial limiting arc strip. The limiting arc strip is located at the end of the lower semi-cylinder near the lower half-compartment. The radial thickness of the limiting arc strip is greater than that of the moving screen plate. A coaxial receiving slot is recessed on the end face of the limiting arc strip facing the moving screen plate. The radial width of the receiving slot corresponds to the radial thickness of the moving screen plate. The corresponding end of the moving screen plate is slidably connected in the receiving slot.

5. The discharge hopper assembly according to claim 4, characterized in that: The inner edge of the end face of the limiting arc strip facing the moving screen plate is chamfered, and one side of the chamfer extends to the opening of the receiving slot.

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