A threshing device for a harvester and a harvester

Abstract

This utility model provides a threshing device for a harvester and a harvester in general. The threshing device includes a threshing box; a main extrusion roller rotatably disposed within the threshing box; multiple auxiliary extrusion rollers rotatably disposed within the threshing box and distributed circumferentially around the main extrusion roller, with a main threshing gap formed between the side walls of the auxiliary and main extrusion rollers; a driving component for driving the main and auxiliary extrusion rollers to rotate synchronously; and a transmission mechanism for connecting the main and auxiliary extrusion rollers, enabling them to rotate at different circumferential speeds. The auxiliary extrusion rollers can form a stable circumferential speed difference with the main extrusion roller, thereby improving the threshing efficiency of the threshing device, ensuring threshing quality, reducing the load on the main extrusion roller, and lowering the risk of damage to the main extrusion roller. The transmission mechanism allows multiple rollers to operate simultaneously with a single driving component, improving the utilization rate of the power source.

Description

Technical Field

[0001] This utility model relates to the field of harvesting equipment technology, specifically to a threshing device for a harvester and a harvester. Background Technology

[0002] In modern agricultural harvesting operations, to improve harvesting efficiency, for hulled crops, harvesting machinery typically integrates harvesting, conveying, threshing, and separating into a single unit. Threshing, as an intermediate step, directly impacts the harvesting efficiency and quality of crops. Traditional combine harvesters usually employ a single threshing roller or a pair of threshing rollers for threshing. Due to the limited number of threshing rollers, the insufficient contact area and duration between the rollers and the crop result in low threshing efficiency, making it difficult to meet the demands of large-scale, high-efficiency modern agricultural production.

[0003] To improve threshing efficiency, some technical solutions expand the threshing range by increasing the number of threshing rollers. Threshing needs to occur between two relatively moving surfaces. Existing technologies typically involve one active threshing roller rotating under the drive mechanism, while the remaining passive threshing rollers are not connected to the drive mechanism. This creates a speed difference between the active and passive threshing rollers, completing the threshing operation. However, this threshing method has low threshing efficiency and inconsistent threshing quality.

[0004] Therefore, how to improve threshing efficiency is a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] To overcome the above-mentioned defects, embodiments of this utility model provide a threshing device for a harvester and a harvester, which solves the technical problem of low threshing efficiency of threshing devices in related technologies.

[0006] According to one aspect, at least one embodiment of the present invention provides a threshing device for a harvester, comprising:

[0007] threshing box;

[0008] The main extrusion roller is rotatably mounted inside the threshing box;

[0009] The auxiliary extrusion rollers are arranged in multiples and are rotatably disposed within the threshing box and distributed circumferentially around the main extrusion roller. A main threshing gap is formed between the sidewalls of the auxiliary extrusion rollers and the main extrusion roller.

[0010] A driving component is used to drive the main extrusion roller and the multiple auxiliary extrusion rollers to rotate synchronously.

[0011] A transmission mechanism is used to drive the main extrusion roller and the auxiliary extrusion roller, so that the main extrusion roller and the auxiliary extrusion roller rotate at different circumferential speeds.

[0012] For example, in the threshing device for a harvester provided in at least one embodiment of the present invention, the auxiliary extrusion roller includes at least two upper extrusion rollers and at least one lower extrusion roller. At least one upper extrusion roller is provided on each of the two sides above the main extrusion roller. A feeding space is formed between the upper extrusion rollers located on the two sides above the main extrusion roller. The inlet of the threshing box leads to the feeding space. The lower extrusion roller is located below the upper extrusion roller.

[0013] For example, in at least one embodiment of the threshing device for a harvester provided by this utility model, an auxiliary squeezing roller is further included. The auxiliary squeezing roller is rotatably disposed in the threshing box. The auxiliary squeezing roller is located on one side of the secondary squeezing roller and rotates with the main squeezing roller. A secondary threshing gap is formed between the auxiliary squeezing roller and the secondary squeezing roller.

[0014] For example, in at least one embodiment of the threshing device for a harvester provided by this utility model, the threshing box includes:

[0015] End plate, the end plate being used for mounting on the harvester.

[0016] A threshing cylinder is rotatably mounted on the harvester. An end plate is located at the end of the threshing cylinder. The main extrusion roller, the secondary extrusion roller, and the auxiliary extrusion roller are all rotatably mounted on the end plate and located inside the threshing cylinder. After the threshing cylinder can rotate, the material inside the threshing cylinder enters the main threshing gap and the secondary threshing gap.

[0017] For example, in at least one embodiment of the threshing device for a harvester provided by the present invention, the side wall of the threshing cylinder is provided with a sieve hole for the threshed material to pass through, and the end of the threshing cylinder away from the end plate has a feed inlet.

[0018] For example, in at least one embodiment of the threshing device for a harvester provided by this utility model, the transmission mechanism includes:

[0019] The main drive wheel is connected to the main extrusion roller and rotates under the drive of the driving component;

[0020] A secondary drive wheel, which is connected to the secondary extrusion roller;

[0021] The main drive component is arranged sequentially around the side of the plurality of auxiliary drive wheels away from the main drive wheel and the upper side of the main drive wheel, so that the plurality of auxiliary drive wheels rotate synchronously with the main drive wheel.

[0022] For example, in at least one embodiment of the threshing device for a harvester provided by this utility model, the transmission mechanism further includes:

[0023] The auxiliary drive wheel has two wheels, which are respectively connected to the auxiliary extrusion roller and the main extrusion roller;

[0024] An auxiliary transmission component is provided, which is capable of causing the auxiliary extrusion roller to rotate following the main extrusion roller by passing around the two auxiliary transmission wheels.

[0025] For example, the threshing device for a harvester provided in at least one embodiment of this utility model further includes:

[0026] The tensioning wheel is rotatably disposed between the main drive wheel, the secondary drive wheel, and / or the auxiliary drive wheel to tension the main drive component and the auxiliary drive component.

[0027] For example, the threshing device for a harvester provided in at least one embodiment of this utility model further includes:

[0028] Mounting plate, the mounting plate being disposed on the threshing box;

[0029] A sliding seat is slidably mounted on the mounting plate, and the tensioning wheel is rotatably mounted on the sliding seat;

[0030] An adjusting rod is provided, with one end rotatably mounted on the sliding seat and the other end threadedly connected to the mounting plate. The adjusting rod can be rotated to adjust the position of the sliding seat.

[0031] According to another aspect, at least one embodiment of the present invention also provides a harvester that includes the above-described threshing device for a harvester.

[0032] The beneficial effects of the embodiments of this utility model are as follows:

[0033] In existing technologies, the active threshing roller transmits frictional force to the passive threshing roller through the crop, thereby driving the passive threshing roller to rotate. In this threshing method, a stable circumferential speed difference is not formed between the active and passive threshing rollers, resulting in unstable threshing quality and poor threshing efficiency. Moreover, the active threshing roller needs to transmit torque to the passive threshing roller, resulting in a large load on the active threshing roller shaft, which can easily cause damage to the active threshing roller.

[0034] In this application, multiple auxiliary extrusion rollers are arranged circumferentially around the main extrusion roller, and each auxiliary extrusion roller rotates under the drive of a driving component. This creates a stable circumferential speed difference between the auxiliary and main extrusion rollers, thereby improving the threshing efficiency and ensuring threshing quality. Furthermore, the main extrusion roller does not need to drive the auxiliary extrusion rollers, reducing the load on the main extrusion roller and lowering the risk of damage. Each auxiliary extrusion roller can form a threshing gap with the main extrusion roller, making efficient use of the space within the threshing box and improving threshing efficiency. Simultaneously, the external structure of the threshing box does not need to be adjusted, facilitating the modification of existing harvesters and reducing the cost of harvester modification. The transmission mechanism allows multiple rollers to operate simultaneously with a single driving component, improving the utilization rate of the power source.

[0035] In addition, this application also provides a harvester that includes the above-mentioned threshing device and has the above-mentioned advantages. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this utility model and these drawings without any creative effort.

[0037] Figure 1 This is a schematic diagram of the threshing device in one embodiment of the present invention;

[0038] Figure 2 for Figure 1 A schematic diagram of the structure when the threshing box is not rotating in the embodiment;

[0039] Figure 3 This is a schematic diagram of the transmission mechanism in another embodiment of the present invention.

[0040] In the diagram: 100, threshing box; 200, main extrusion roller; 300, auxiliary extrusion roller; 201, main threshing gap; 301, upper extrusion roller; 302, lower extrusion roller; 3011, feeding space; 400, auxiliary extrusion roller; 401, auxiliary threshing gap; 101, end plate; 102, threshing cylinder; 1021, sieve hole; 1022, feed inlet; 210, main drive wheel; 211, first drive wheel; 212, second drive wheel; 310, auxiliary drive wheel; 510, main drive component; 410, auxiliary drive wheel; 610, auxiliary drive component; 710, tension wheel; 810, mounting plate; 820, sliding seat; 830, adjusting rod. Detailed Implementation

[0041] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit its scope.

[0042] To keep the drawings concise, only the parts relevant to the utility model are shown schematically in each drawing; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of the components with the same structure or function is schematically shown, or only one is labeled. In this document, "a" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0043] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between 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.

[0044] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0045] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to 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.

[0046] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0047] like Figure 1The diagram illustrates a threshing device for a harvester according to one embodiment of the present invention. It includes a threshing box 100, within which a main compression roller 200 is disposed. The main compression roller 200 is rotatably mounted on both side walls of the threshing box 100 via a rotating shaft, with one end extending outside the threshing box 100 for connection to a power source. Multiple auxiliary compression rollers 300 are also disposed within the threshing box 100. These auxiliary compression rollers 300 are spaced apart circumferentially from the central axis of the main compression roller 200, and can be evenly distributed or non-uniformly distributed according to threshing requirements. Each auxiliary compression roller 300 is rotatably mounted within the threshing box 100 via its own rotating shaft, which is parallel to the rotating shaft of the main compression roller 200. A main threshing gap 201 is formed between the side walls of the auxiliary extrusion roller 300 and the main extrusion roller 200. The main extrusion roller 200 is driven by a power source to rotate in a certain direction, while the auxiliary extrusion roller 300 rotates synchronously with the main extrusion roller 200 through a transmission mechanism. Each auxiliary extrusion roller 300 can form a threshing gap with the main extrusion roller 200, making reasonable use of the space inside the threshing box and improving threshing efficiency. At the same time, the external structure of the threshing box 100 does not need to be adjusted, which facilitates the modification of existing harvesters and reduces the cost of harvester modification. In actual installation, the drive component drives the main extrusion roller 200 and the auxiliary extrusion roller 300 to rotate synchronously through the transmission mechanism, while also giving the main extrusion roller 200 and the auxiliary extrusion roller 300 different circumferential speeds. For example, if the radii of the auxiliary extrusion roller 300 and the main extrusion roller 200 are different, the transmission mechanism can cause the main extrusion roller 200 and the auxiliary extrusion roller 300 to rotate at the same angular velocity, thus creating a circumferential speed difference between them. If the radii of the main extrusion roller 200 and the auxiliary extrusion roller 300 are the same, the transmission mechanism can cause them to rotate at different angular velocities. Of course, users can also use other methods to make the circumferential speed of the main extrusion roller 200 different from that of the auxiliary extrusion roller 300, ensuring that the product of the rotational angular velocity of the main extrusion roller 200 and its radius is not equal to the product of the rotational angle of the auxiliary extrusion roller 300 and its radius; this is not limited here. The transmission mechanism allows multiple rollers to operate simultaneously with a single drive component, improving the utilization rate of the power source. When hulled crops enter the threshing chamber 100, they are drawn into the main threshing gap 201 by the rotation of the main extrusion roller 200 and the auxiliary extrusion roller 300. Due to the circumferential speed difference between the main extrusion roller 200 and the auxiliary extrusion roller 300, a squeezing and rubbing action is generated on the crops at the main threshing gap 201, thereby achieving threshing. The main extrusion roller 200 and the auxiliary extrusion roller 300 are commonly used threshing rollers in the prior art, typically cylindrical, with multiple evenly distributed raised side ridges on the sidewalls. Threshing is achieved through the squeezing and friction between the rollers.It should be noted that the diameter of the main extrusion roller 200 is usually larger than the diameter of the auxiliary extrusion roller 300 so that multiple auxiliary extrusion rollers 300 can be arranged circumferentially around the main extrusion roller 200.

[0048] Optionally, the outer surfaces of the main extrusion roller 200 and the auxiliary extrusion roller 300 are provided with protruding structures. The protruding structures can limit the material and separate the particles from the stems and leaves in the material through the relative movement of the protruding structures on the outer surfaces of the main extrusion roller 200 and the auxiliary extrusion roller 300.

[0049] In this threshing device, multiple auxiliary extrusion rollers 300 are circumferentially distributed around the main extrusion roller 200, forming multiple main threshing gaps 201 between the main extrusion roller 200 and the auxiliary extrusion rollers 300. Compared with traditional devices using a single or a pair of threshing rollers, this significantly increases the contact opportunities between the threshing rollers and the crop. When the crop is not threshed completely in one extrusion, it can enter the next main threshing gap 201 to continue threshing, thus enabling more efficient threshing. Simultaneously, multiple main threshing gaps 201 can operate at the same time, improving threshing efficiency and meeting the needs of large-scale, high-efficiency modern agricultural production. The structure of multiple auxiliary extrusion rollers 300 circumferentially distributed around the main extrusion roller 200 allows for a more concentrated transmission mechanism, facilitating its arrangement.

[0050] Reference Figure 2 When the threshing box 100 itself is not rotating, the inlet of the threshing box 100 can be set at the upper end of the threshing box 100. At this time, the auxiliary extrusion roller 300 includes at least two upper extrusion rollers 301 and at least one lower extrusion roller 302. At least one upper extrusion roller 301 is respectively set on both sides above the main extrusion roller 200. The two upper extrusion rollers 301 form an upward-opening feeding space 3011 directly above the main extrusion roller 200. The inlet of the threshing box 100 directly leads to the feeding space 3011, so that the crop can fall directly from above between the two upper extrusion rollers 301 and the main extrusion roller 200. The lower extrusion roller 302 is set below the upper extrusion rollers 301, and its axis is parallel to the axis of the main extrusion roller 200 and located in the area circumferentially below the main extrusion roller 200. In the rotational direction of the main extrusion roller 200, the lower extrusion roller 302 is positioned behind the upper extrusion roller 301, meaning that a point on the main extrusion roller 200 will first pass the upper extrusion roller 301 and then the lower extrusion roller 302. Figure 2In the specific embodiment shown, the main extrusion roller 200 rotates clockwise, and the two upper extrusion rollers 301 and the lower extrusion roller 302 are distributed clockwise around the outer periphery of the main extrusion roller 200. For example, after the material enters the feeding space 3011, the protruding structure on the main extrusion roller 200 can limit the material and drive the material to rotate with the main extrusion roller 200. After the material passes through the upper extrusion roller 301, most of the particles are removed. As the main extrusion roller 200 rotates further, the material enters the lower extrusion roller 302, which can further thresh the material, thereby making the threshing more thorough and improving the crop yield.

[0051] In this embodiment, the symmetrical arrangement of the auxiliary extrusion rollers 300 above the main extrusion rollers 200 ensures that all crops falling into the feeding space 3011 can enter the main threshing gap 201 for threshing. This prevents some crops from rolling to the bottom of the threshing box 100 and failing to be threshed during the rotation of the main extrusion rollers 200, thus improving the quality and reliability of threshing. The auxiliary extrusion rollers 300 are designed with an upper extrusion roller 301 and a lower extrusion roller 302, forming a dedicated feeding space 3011 above the main extrusion rollers 200. The inlet of the threshing box 100 directly connects to this space, guiding crops into the threshing area in an orderly manner and avoiding blockages caused by chaotic feeding. The upper extrusion rollers 301 are distributed above both sides of the main extrusion rollers 200, forming the initial threshing area with the main extrusion rollers 200. The lower extrusion rollers 302 then perform secondary extrusion threshing on the material passing through the main threshing gap 201, extending the material's path within the threshing box 100 and increasing the number of threshing cycles. The auxiliary threshing gap 401 formed by the auxiliary extrusion roller 400 and the secondary extrusion roller 300 can further process the material discharged from the main threshing gap 201. Through the synergistic effect of multiple threshing gaps, the thoroughness of threshing is significantly improved.

[0052] To fully utilize the space within the threshing chamber 100, auxiliary pressing rollers 400 can be installed inside the threshing chamber 100. These rollers are rotatably mounted within the threshing chamber 100, specifically located on one side of a secondary pressing roller 300. A secondary threshing gap 401 is formed between the auxiliary pressing roller 400 and the side wall of the corresponding secondary pressing roller 300. By installing auxiliary pressing rollers 400, the number of threshing gaps is further increased. This also avoids the problem of too many secondary pressing rollers 300 arranged circumferentially around the main pressing roller 200, which would result in a small distance between the secondary pressing rollers 300, making it difficult for crops to enter the main threshing gap 201 and thus affecting threshing efficiency. This makes the space utilization within the threshing chamber 100 more rational.

[0053] Reference Figure 1When the threshing box 100 itself can rotate, the inlet of the threshing box 100 can be set at one end of the axial direction of the threshing box 100, thereby realizing continuous material feeding into the threshing box 100 during rotation. The threshing box 100 includes an end plate 101 and a threshing cylinder 102. The end plate 101 is mounted on the frame of the harvester and is used to support the rotating shafts of the main extrusion roller 200, the secondary extrusion roller 300, and the auxiliary extrusion roller 400. The two ends of the rotating shafts of each roller are respectively connected to the end plate 101 and can rotate around their own axis. The threshing cylinder 102 is a cylindrical structure, rotatably mounted on the harvester, and open at both ends, located between the two end plates 101. One end is open as the feed inlet 1022, and the other end can be used as the outlet. The main extrusion roller 200, the secondary extrusion roller 300, and the auxiliary extrusion roller 400 are all located inside the threshing cylinder 102. The inner wall of the threshing cylinder 102 is provided with sieve holes 1021. The diameter of the sieve holes 1021 is larger than the size of the threshed grains but smaller than the size of the uncropped crop, so that the threshed grains can pass through the sieve holes 1021 for separation, while impurities such as stalks can be discharged from the outlet of the threshing cylinder 102. When the harvester is working, the threshing cylinder 102 can rotate around its own axis, driving the material to move inside the threshing cylinder 102 and enter the main threshing gap 201 and the secondary threshing gap 401.

[0054] The threshing box 100 adopts a combined structure of end plate 101 and threshing cylinder 102. End plate 101 provides mounting support for each roller, ensuring the coaxiality and rotational accuracy of the rotating shaft. The rotation of threshing cylinder 102 allows for uniform material distribution and continuous conveying into the threshing gap, avoiding local accumulation. Threshing-completed crops can be discharged through sieve holes 1021. The sieve holes 1021 achieve preliminary separation of grains and impurities after threshing, reducing the load on subsequent separation devices. Crops that have not been threshed can re-enter the main threshing gap 201 or the secondary threshing gap 401 for threshing as the threshing cylinder 102 rotates. The feed inlet 1022 is located at the end of the threshing cylinder 102 and connects with the feed space 3011, forming a smooth material conveying channel and improving the continuity of the overall operation.

[0055] In some embodiments, the height of the end plate 101 in the vertical direction may be less than the diameter of the threshing cylinder 102, and the midpoint of the end plate 101 may be located on the axis of the threshing cylinder 102. Therefore, the threshing cylinder 102 has openings both above and below the end plate 101, wherein the opening above the end plate 101 can serve as a feed inlet 1022, and the opening below the end plate 101 can serve as a discharge outlet, from which stalks and other debris can be discharged.

[0056] like Figure 3As shown, this illustrates a transmission mechanism in another embodiment of the present invention. The transmission mechanism includes a main drive wheel 210 connected to the main extrusion roller 200 and auxiliary drive wheels 310 connected to each auxiliary extrusion roller 300. The main drive component 510 (such as a drive belt, chain, or toothed belt) is wound around the auxiliary drive wheels 310 sequentially from the side away from the main drive wheel 210 and the upper side of the main drive wheel 210, so that the main drive wheel 210 drives all the auxiliary drive wheels 310 to rotate synchronously through the main drive component 510. The transmission ratio between the main drive wheel 210 and the auxiliary drive wheels 310 is related to the radius of the main extrusion roller 200 and the auxiliary extrusion roller 300. The specific value is selected to ensure that the main extrusion roller 200 and the auxiliary extrusion roller 300 have different circumferential speeds. Auxiliary drive wheels 410 are fixedly mounted on the shafts of both the auxiliary extrusion roller 400 and the main extrusion roller 200. An auxiliary drive component 610 (such as a drive belt, chain, or toothed belt) is wound around the auxiliary drive wheel 410, causing the auxiliary extrusion roller 400 to rotate synchronously with the main extrusion roller 200. Since the auxiliary drive wheel 410 and the main drive wheel 210 are connected to the same auxiliary drive wheel 410, they have the same rotational angular velocity through the transmission of the auxiliary drive component 610. Because the rotational angular velocity is already determined, the radius of the auxiliary extrusion roller 400 can be determined based on the relationship between the radius of the secondary extrusion roller 300 and the rotational angular velocity. This results in a difference in circumferential speed between the secondary extrusion roller 300 and the auxiliary extrusion roller 400, allowing them to form an auxiliary threshing gap for threshing operations. The main drive component 510, by sequentially winding around the main drive wheel 210 and multiple secondary drive wheels 310, provides power transmission and coordinated operation for multiple secondary extrusion rollers 300, simplifying the transmission mechanism, reducing the number of parts, and lowering assembly difficulty. In actual installation, the main drive component 510, arranged around the main drive wheel 210 and the auxiliary drive wheel 310, can simultaneously drive multiple auxiliary extrusion rollers 300 with a single power source (the power source driving the main extrusion roller 200). This eliminates the need for separate power inputs for each auxiliary extrusion roller 300, significantly simplifying the transmission structure and reducing the use of gears, couplings, and other components. The auxiliary drive component 610 connects the main extrusion roller 200 and the auxiliary extrusion roller 400, ensuring that the power for the auxiliary extrusion roller 400 originates from the main extrusion roller 200. This further integrates the power transmission path and avoids synchronization and coordination issues caused by multiple power sources. This effectively prevents problems such as component misalignment and difficulty in ensuring transmission precision, making installation more convenient and reducing time and effort. Simultaneously, the simplified transmission structure also reduces the later maintenance and repair costs of the equipment.

[0057] exist Figure 3In the specific embodiment shown, the main drive wheel 210 includes a first drive wheel 211 and a second drive wheel 212 coaxially arranged. The diameter of the first drive wheel 211 is larger than that of the second drive wheel 212. The first drive wheel 211 is used to cooperate with the secondary drive wheel 310 for transmission, and the second drive wheel 212 is used to cooperate with the auxiliary drive wheel 410 for transmission. Optionally, each secondary drive wheel 310 is disposed inside the main drive member 510, and the first drive wheel 211 is disposed outside the main drive member 510. The rotation direction of the first drive wheel 211 is opposite to that of each secondary drive wheel 310, thus the rotation directions of the main extrusion roller 200 and the secondary extrusion roller 300 are opposite. The second drive wheel 212 and the auxiliary drive wheel 410 are both disposed inside the secondary drive member 610, thus the rotation directions of the main extrusion roller 200 and the auxiliary extrusion roller 410 are opposite.

[0058] Optionally, the first transmission wheel 211, the second transmission wheel 212, the secondary transmission wheel 310, and the auxiliary transmission wheel 410 are all gears, while the main transmission component 510 and the secondary transmission component 610 are both chains. Therefore, the transmission mechanism can better control the rotational speeds of the main extrusion roller 200, the secondary extrusion roller 300, and the auxiliary extrusion roller 400. In one specific embodiment of this application, the first transmission wheel 211 has 52 teeth, the secondary transmission wheel 310 has 28 teeth, and the second transmission wheel 212 and the auxiliary transmission wheel 410 both have 30 teeth. Of course, other transmission methods can also be used, such as belt drive or gear drive, and the number of teeth on the first transmission wheel 211, the secondary transmission wheel 310, the second transmission wheel 212, and the auxiliary transmission wheel 410 is not limited to these.

[0059] An mounting plate 810 is fixedly mounted on the end plate 101. A sliding seat 820 is slidably mounted on the mounting plate 810 via a guide rail or slide groove. A tensioning wheel 710 is rotatably connected to the sliding seat 820 and is used to tension the main drive component 510 and the auxiliary drive component 610. One end of an adjusting rod 830 is rotatably connected to the sliding seat 820, and the other end is threadedly engaged with a threaded hole on the mounting plate 810. When the adjusting rod 830 is rotated, the sliding seat 820 can slide along the mounting plate 810, thereby adjusting the tensioning force of the tensioning wheel 710 on the main drive component 510 and the auxiliary drive component 610.

[0060] The engagement between the tensioning wheel 710 and the sliding seat 820 allows for real-time tension adjustment based on the wear of the transmission components, ensuring transmission stability and accuracy and preventing speed fluctuations or slippage caused by loose transmission components. The threaded engagement between the sliding seat 820 and the adjusting rod 830 simplifies tension adjustment, eliminating the need to disassemble numerous parts and improving installation and maintenance efficiency. The integrated transmission mechanism, through its compact layout and simplified transmission path, ensures synchronous operation of multiple rollers while reducing assembly difficulty and the risk of component misalignment. It works synergistically with the circumferentially distributed multi-roller structure of the threshing unit, achieving the dual goals of improved threshing efficiency and simplified transmission structure.

[0061] This utility model also proposes a harvester, which includes the aforementioned threshing device for harvesters. The transmission mechanism in the threshing device synchronously transmits the power of the drive component to multiple rollers, reducing the number of power sources in the harvester and improving the power transmission efficiency of the harvester. The rational arrangement of multiple rollers within the threshing box 100 provides multiple threshing gaps for the harvester, further improving the harvesting efficiency of the harvester.

[0062] It should be noted that the above embodiments are only used to illustrate the technical solution 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 solution of this utility model without departing from the spirit and scope of the technical solution 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 threshing device for a harvester, characterized in that, include: Threshing box (100); The main extrusion roller (200) is rotatably disposed within the threshing box (100); A plurality of secondary extrusion rollers (300) are provided, and the plurality of secondary extrusion rollers (300) are rotatably disposed within the threshing box (100) and distributed circumferentially around the main extrusion roller (200). A main threshing gap (201) is formed between the sidewalls of the secondary extrusion rollers (300) and the main extrusion roller (200). A driving component is used to drive the main extrusion roller (200) and the plurality of auxiliary extrusion rollers (300) to rotate synchronously; A transmission mechanism is provided for transmitting power to the main extrusion roller (200) and the auxiliary extrusion roller (300), causing the main extrusion roller (200) and the auxiliary extrusion roller (300) to rotate at different circumferential speeds.

2. The threshing device for a harvester according to claim 1, characterized in that, The auxiliary extrusion roller (300) includes at least two upper extrusion rollers (301) and at least one lower extrusion roller (302). At least one upper extrusion roller (301) is provided on each of the two sides above the main extrusion roller (200). A feeding space (3011) is formed between the upper extrusion rollers (301) located on both sides above the main extrusion roller (200). The inlet of the threshing box (100) leads to the feeding space (3011). The lower extrusion roller (302) is located below the upper extrusion rollers (301).

3. The threshing device for a harvester according to claim 1, characterized in that, It also includes an auxiliary extrusion roller (400), which is rotatably disposed inside the threshing box (100). The auxiliary extrusion roller (400) is located on one side of a secondary extrusion roller (300) and rotates with the main extrusion roller (200). A secondary threshing gap (401) is formed between the auxiliary extrusion roller (400) and the secondary extrusion roller (300).

4. The threshing device for a harvester according to claim 3, characterized in that, The threshing box (100) includes: End plate (101), said end plate (101) is used for mounting on the harvester, A threshing cylinder (102) is rotatably mounted on the harvester. An end plate (101) is located at the end of the threshing cylinder (102). The main extrusion roller (200), the secondary extrusion roller (300), and the auxiliary extrusion roller (400) are all rotatably mounted on the end plate (101) and located inside the threshing cylinder (102). After the threshing cylinder (102) can rotate, the material inside the threshing cylinder (102) enters the main threshing gap (201) and the secondary threshing gap (401).

5. The threshing device for a harvester according to claim 4, characterized in that, The threshing cylinder (102) has a sieve hole (1021) on its side wall for the threshed material to pass through, and the end of the threshing cylinder (102) away from the end plate (101) has a feed inlet (1022).

6. The threshing device for a harvester according to claim 3, characterized in that, The transmission mechanism includes: The main drive wheel (210) is connected to the main extrusion roller (200) and rotates under the drive of the driving member; A secondary drive wheel (310) is connected to the secondary extrusion roller (300); The main drive component (510) passes sequentially around the side of the plurality of auxiliary drive wheels (310) away from the main drive wheel (210) and the upper side of the main drive wheel (210) so that the plurality of auxiliary drive wheels (310) rotate synchronously with the main drive wheel (210).

7. The threshing device for a harvester according to claim 6, characterized in that, The transmission mechanism also includes: Two auxiliary drive wheels (410) are connected to the auxiliary extrusion roller (400) and the main extrusion roller (200), respectively. An auxiliary transmission component (610) is provided, which is capable of causing the auxiliary extrusion roller (400) to rotate following the main extrusion roller (200) via two auxiliary transmission wheels (410).

8. The threshing device for a harvester according to claim 7, characterized in that, Also includes: Tensioner (710), which is rotatably disposed between the main drive wheel, the secondary drive wheel and / or the auxiliary drive wheel to tension the main drive member (510) and the auxiliary drive member (610).

9. The threshing device for a harvester according to claim 8, characterized in that, Also includes: Mounting plate (810), said mounting plate (810) is disposed on the threshing box (100); A sliding seat (820) is slidably disposed on the mounting plate (810), and a tensioning wheel (710) is rotatably disposed on the sliding seat (820); An adjusting rod (830) is provided, with one end rotatably mounted on the sliding seat (820) and the other end threadedly connected to the mounting plate (810). The adjusting rod (830) can rotate to adjust the position of the sliding seat (820).

10. A harvester, characterized in that, The threshing device for a harvester as described in any one of claims 1 to 9.

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