Automatic debris removal device for corn harvester

Abstract

The present invention discloses an automatic impurity removal device applied to a corn harvester, which relates to the technical field of agricultural machinery, and comprises: a screening plate, wherein the screening plate comprises a plurality of conveyor belts, a plurality of inclined plates are arranged on the conveyor belts, and each inclined plate is arranged equidistantly along the length direction of the conveyor belt, and a plurality of straight notches are arranged equidistantly on the side end surface of the conveyor belt, and shafts extending along the length direction of the inclined plates are arranged on both sides of the inclined plates, and the shafts are inserted into the corresponding straight notches; a swing rod is rotatably arranged on the outer wall of the conveyor belt, and a avoidance groove is provided at the lower end of the swing rod. The present invention effectively solves the problem of screen plate blockage caused by broken stalks, corn leaves and kernels of similar size, and the problem of corn silk hanging on the screen plate by improving the impurity removal mechanism. The impurity removal process is smoother, and impurities can be separated from corn kernels more thoroughly, which greatly improves the impurity removal efficiency and ensures the purity of corn harvest.

Description

Technical Field

[0001] The invention relates to the technical field of agricultural machinery, and in particular to an automatic debris removal device applied to a corn harvester. Background Art

[0002] Corn harvesters are machines that mechanically complete corn stalk cutting, ear picking, husking, threshing, straw processing and even tillage after harvesting when corn is ripe, according to its planting method and agronomic requirements. In modern agricultural production, corn harvesting is one of the important links.

[0003] In the field of corn harvesting in modern agriculture, corn harvesting operations are a key link in ensuring efficient grain production and subsequent utilization. At present, in the process of corn harvesting, the main process is to send the picked ears into the threshing system to complete threshing. However, after the threshing process is completed, impurities such as broken stalks and peeled corn leaves often appear. These impurities are caused by the mechanical action of corn plants during harvesting, transportation and threshing. In the threshing system, corn ears are affected by various mechanical components, which makes the broken stalks and corn leaves originally attached to the ears or mixed in during the harvesting process further detached and mixed with the threshed corn kernels.

[0004] In order to ensure the quality of corn harvest and avoid contamination of corn kernels by impurities, a vibrating screening device is usually installed inside the harvester to remove impurities from the threshed corn.

[0005] However, this existing processing method has certain limitations:

[0006] On the one hand, due to the diversity of broken stalks and corn leaves in shape, size and weight, some impurities of similar size to kernels may clog the screen plate, resulting in reduced impurity removal efficiency, increasing equipment maintenance costs and downtime, and thus affecting the efficiency and quality of the entire corn harvesting operation;

[0007] On the other hand, corn silk among impurities has special physical properties. Its slenderness and good flexibility make it easier for corn silk to adhere to the surface of the sieve plate than other impurities during the impurity removal process, resulting in a hanging phenomenon. This hanging phenomenon will reduce the effective screening area of ​​the sieve plate and further reduce the impurity removal efficiency. At the same time, since the corn silk is tightly attached to the sieve plate, cleaning becomes very difficult, increasing the manual cleaning cost.

[0008] In view of this, this application is hereby filed. Summary of the invention

[0009] The object of the present invention is to provide an automatic debris removal device for a corn harvester to solve the problems raised in the above-mentioned background technology.

[0010] In order to solve the above technical problems, the present invention provides an automatic debris removal device applied to a corn harvester, comprising:

[0011] A screening plate, wherein the screening plate comprises a plurality of conveyor belts, a plurality of inclined plates are arranged on the conveyor belts, and each inclined plate is arranged equidistantly along the length direction of the conveyor belts, a plurality of straight slots are equidistantly arranged on the side end surface of the conveyor belts, and shafts extending along the length direction of the inclined plates are arranged on both sides of the inclined plates, and the shafts are inserted into the corresponding straight slots;

[0012] The swing rod is rotatably arranged on the outer wall of the conveyor belt. An avoidance groove is provided at the lower end of the swing rod, and the groove extends along the length direction of the inclined plate. The shaft is movably inserted in the avoidance groove. There is an angle between the avoidance groove and the extension direction of the straight groove. A trigger member that can drive the swing rod to rotate is provided on the moving path of the conveyor belt, and is used for driving the corresponding inclined plate to move along the extension direction of the straight groove after the swing rod contacts the trigger member.

[0013] Furthermore, the swing arm comprises:

[0014] A connecting portion, the connecting portion is rotatably connected to the outer wall of the conveyor belt, and the avoidance groove is located at the lower end of the connecting portion;

[0015] A turning portion, the turning portion is connected to the upper end of the connecting portion and extends eccentrically along the width direction of the inclined plate;

[0016] An extension part, wherein the extension part is connected to the free end of the turning part and is parallel to the inclined plate, and a trigger angle is formed at the connection between the turning part and the extension part; in an initial state, the trigger member and the trigger angle are on the same horizontal line, and as the swing rod moves, the trigger member conflicts with the trigger angle to drive the swing rod to rotate.

[0017] Furthermore, a rotating shaft extending along the thickness direction of the swing lever is arranged on the side wall of the swing lever, the rotating shaft is fixed to the top surface of the conveyor belt, and the swing lever can rotate along the axis of the rotating shaft itself.

[0018] Furthermore, the sieve plate further comprises:

[0019] A plurality of bearing plates are installed at intervals inside the corn harvester; the triggering member is fixedly installed on the top wall of the bearing plate;

[0020] A plurality of conveying rollers are rotatably arranged on the inner side wall of the carrying plate for supporting and guiding the conveying belt, and a driving motor for driving the conveying rollers to rotate is also arranged on the outer wall thereof.

[0021] Furthermore, the transmission belt comprises:

[0022] The belt body is meshingly driven and arranged on the conveying roller;

[0023] A shaft sleeve, the shaft sleeve is slidably connected inside the straight slot, and the shaft portion is rotatably connected inside the shaft sleeve;

[0024] A push spring is connected to one side of the shaft sleeve, and one end of the push spring away from the shaft sleeve is connected to the side wall of the straight slot.

[0025] Furthermore, one end of the shaft away from the inclined plate is also connected to a transmission gear, and a transmission rack meshing with the transmission gear is provided on the inner wall of the bearing plate. When the trigger member drives the swing rod to rotate, the transmission gear meshes with the transmission rack.

[0026] Furthermore, a torsion spring is sleeved on the outside of the shaft, one end of the torsion spring is connected to the side wall of the transmission gear, and the other end of the torsion spring is connected to the side wall of the shaft sleeve.

[0027] Furthermore, the inclined plate comprises:

[0028] The plate part is an inclined thin sheet structure, on which a plurality of slots are evenly spaced;

[0029] A plurality of sliding parts are in a straight strip structure and are slidably connected inside the groove body.

[0030] Furthermore, a guide groove recessed inwardly is provided on the inner wall of the groove body in the length direction, and a guide block is provided on the side wall of the sliding part, and the guide block slides along the guide groove.

[0031] Furthermore, the length of the sliding portion is the same as that of the plate portion. When the sliding portion is fully inserted into the groove body, its end surface is higher than the end surface of the plate portion, so that the top surface of the inclined plate forms a serrated surface structure.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] 1. The present invention can drive the inclined plate to continuously circulate through the conveyor belt. During the movement of the inclined plate, the swing rod on the side wall thereof will conflict with the trigger member. After the swing rod is triggered by the trigger member, it will rotate, and the avoidance groove at one end of the swing rod will pull the shaft installed on the side wall of the inclined plate to move horizontally along the conveyor belt. The movement of the shaft can drive the inclined plate to move, thereby changing the distance between two adjacent inclined plates, thereby achieving the effect of increasing the screening channel, so that the inclined plate can clean up the blocked impurities when it moves to the position of the trigger member, thereby avoiding blockage of the screening channel.

[0034] 2. In the present invention, when the trigger member drives the swing rod to rotate, the transmission gear meshes with the transmission rack, thereby realizing further transmission and conversion of power, driving the shaft to perform a specific rotation, and the shaft can drive the triggered inclined plate to rotate. The rotation of the triggered inclined plate can change the angle between the other inclined plate adjacent to it, thereby further helping to discharge the blocked impurities from the screening channel.

[0035] 3. In the present invention, the sliding part can slide in the trough body to change the surface morphology of the inclined plate. During the process of the conveyor belt driving the inclined plate to circulate, when the sliding part is downward, due to the gravity factor, the sliding part will slide out of the trough body. On the one hand, the problem of corn silk sticking can be avoided. On the other hand, the inclined plate moving below the conveyor belt can be prevented from blocking the wind blown by the fan. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0037] Figure 2 It is a schematic diagram of the structure inside the body of the present invention;

[0038] Figure 3 It is a schematic diagram of the three-dimensional structure of the vibration screening assembly in the present invention;

[0039] Figure 4 It is a front view structural schematic diagram of the vibration screening assembly in the present invention;

[0040] Figure 5 It is a structural schematic diagram of the screening plate in the present invention;

[0041] Figure 6 for Figure 5 A magnified view of the structure at center A;

[0042] Figure 7 It is a schematic diagram of the structure of the transmission belt in the present invention;

[0043] Figure 8 It is a schematic diagram of the connection structure between the conveyor belt and the inclined plate in the present invention;

[0044] Fig. 9 It is a schematic diagram of the overall structure of the inclined plate in the present invention;

[0045] Fig.10 for Fig. 9 A magnified view of the structure at B in the middle;

[0046] Fig.11 It is a structural schematic diagram of the inclined plate in the expanded state in the present invention.

[0047] In the figure: 1. Harvester body; 2. Harvesting device; 3. Lifting channel; 4. Threshing device; 5. Traveling device; 6. Collecting plate; 7. Fan;

[0048] 8. Screening plate; 801. Carrying plate; 802. Conveying roller; 803. Conveying belt; 8031. Belt body; 8032. Straight notch; 804. Inclined plate; 8041. Plate portion; 8042. Sliding portion; 8043. Slot body; 8044. Guide groove; 8045. Shaft portion; 8046. Transmission gear; 805. Bushing; 806. Push spring; 807. Swinging rod; 808. Trigger; 809. Rotating shaft; 810. Transmission rack; 811. Torsion spring; 812. Miscellaneous material collecting bin; 813. Third screw conveyor;

[0049] 9. De-dusting net; 901. Fish scale plate; 902. Material guide plate;

[0050] 10. Material receiving section; 1001. Material receiving plate; 1002. Grain collecting bin; 1003. First screw conveyor; 1004. Impurity collecting bin; 1005. Second screw conveyor. DETAILED DESCRIPTION

[0051] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0052] See also Figure 1-Figure 11 The present invention provides a technical solution: an automatic debris removal device applied to a corn harvester, comprising:

[0053] The screening plate 8 includes a plurality of conveyor belts 803, on which a plurality of inclined plates 804 are arranged, and each inclined plate 804 is arranged equidistantly along the length direction of the conveyor belt 803, and a plurality of straight slots 8032 are equidistantly arranged on the side end surface of the conveyor belt 803, and shafts 8045 extending along the length direction thereof are arranged on both sides of the inclined plate 804, and the shafts 8045 are inserted into the corresponding straight slots 8032.

[0054] The swing rod 807 is rotatably arranged on the outer wall of the conveyor belt 803. An avoidance groove is provided at the lower end of the swing rod 807, and the groove extends along the length direction of the inclined plate 804. The shaft 8045 is movably inserted in the avoidance groove. There is an angle between the avoidance groove and the extension direction of the straight groove 8032. A trigger member 808 that can drive the swing rod 807 to rotate is provided on the moving path of the conveyor belt 803, and is used for driving the corresponding inclined plate 804 to move along the extension direction of the straight groove 8032 after the swing rod 807 contacts the trigger member 808.

[0055] It should be noted that the corn harvester is mainly composed of the following parts: a harvester body 1, a harvesting device 2, a lifting channel 3, a threshing device 4, a walking device 5, a collecting plate 6 and a fan 7.

[0056] The harvesting device 2 is installed at the front end of the harvester body 1, and its function is to separate the corn plants from the natural growth state in the field, guide the corn plants into the internal cutter, and harvest the corn through the cutter;

[0057] The lifting channel 3 cooperates with the harvesting device 2 to transport the harvested corn plants to the threshing device 4 .

[0058] When the threshing device 4 is working, threshing is achieved through an axial flow drum with spiral blades inside. After the corn plants enter the drum, they are pushed by the spiral blades to move axially while threshing. At the same time, the axial flow threshing can also separate and clean the corn to a certain extent, and preliminarily separate the corn kernels, corn cobs and other impurities.

[0059] The traveling device 5 is a crawler type, which is used to drive the harvester body 1 to move in the field. It mainly includes components such as driving wheels, guide wheels and crawlers. The crawler type has better adhesion and passability, and is suitable for operations in wet and soft fields. The speed of the traveling device 5 can be adjusted according to the actual needs of the harvesting operation. When harvesting, it generally travels at a slower speed to ensure the harvesting quality; when transferring in the field, the speed can be appropriately increased.

[0060] The collecting plate 6 is arranged below the threshing device 4 to transport the corn separated by the threshing device 4 to the screening plate 8.

[0061] The fan 7 is arranged below the aggregate plate 6, and its air outlet corresponds to the screening plate 8. The fan 7 is mainly used to generate airflow to blow away lighter impurities such as chaff and broken leaves from the corn kernels. The air volume and wind speed of the fan 7 can be adjusted. When harvesting dry corn, a larger air volume and wind speed may be required to completely remove impurities; when harvesting corn with a higher water content, the air volume and wind speed need to be appropriately reduced to avoid blowing the corn kernels away. The fan 7 is installed on one side of the screening plate 8 and is used in conjunction with the screening plate 8 to complete the separation and impurity removal of the corn kernels.

[0062] The impurity removal net 9 is arranged below the screening plate 8. The corn separated by the screening plate 8 will fall onto the impurity removal net 9, and the corn will be screened again by the impurity removal net 9, thus achieving a double screening effect.

[0063] The receiving part 10 is arranged below the impurity removing net 9. The corn kernels separated by the screening plate 8 and the impurity removing net 9 will fall on the receiving part 10. Specifically, the impurity removing net 9 includes a fish scale plate 901 and a guide plate 902 obliquely installed on the bottom of the fish scale plate 901. The receiving part 10 includes a receiving plate 1001 installed below the impurity removing net 9. A grain collecting bin 1002 for collecting corn kernels is arranged on the receiving plate 1001. A first screw conveyor 1003 for conveying corn kernels to the outside of the harvester body 1 is arranged inside the grain collecting bin 1002. An impurity collecting bin 1004 for collecting corn impurities is also arranged on the receiving plate 1001. A second screw conveyor 1005 for conveying corn kernels to the outside of the harvester body 1 is arranged inside the impurity collecting bin 1004.

[0064] A vibration motor is also provided inside the harvester body 1, and the vibration motor is connected to the screening plate 8 through a vibration shaft. After the vibration motor is started, vibration is generated, and the vibration is transmitted to the screening plate 8 through the vibration shaft, providing a power basis for the entire screening process, so that the corn on the screening plate 8 can be initially loosened and separated under the action of vibration.

[0065] Specifically, a plurality of inclined plates 804 are distributed along the length direction of the conveyor belt 803, and the gap between two adjacent inclined plates 804 forms a screening channel. When corn containing impurities falls on the inclined plate 804, a screening channel is formed to screen the corn, and the impurities remain on the upper surface of the inclined plate 804, while some impurities will be blocked in the formed screening channel.

[0066] The conveyor belt 803 can drive the inclined plate 804 to continuously circulate. During the movement of the inclined plate 804, the swing rod 807 on its side wall will conflict with the trigger member 808. After the swing rod 807 is triggered by the trigger member 808, it will rotate. The avoidance groove at one end of the swing rod will pull the shaft 8045 installed on the side wall of the inclined plate 804 to move horizontally along the conveyor belt 803. The movement of the shaft 8045 can drive the inclined plate 804 to move, thereby changing the distance between two adjacent inclined plates 804, thereby increasing the effect of increasing the screening channel, so that the inclined plate 804 can clean up the blocked impurities when it moves to the position of the trigger member 808, thereby avoiding blockage of the screening channel.

[0067] By improving the impurity removal mechanism, the problem of clogging of the screening plate 8 caused by broken stalks, corn leaves and kernels of similar size, as well as the problem of corn silk hanging on the screening plate 8 are effectively solved. The impurity removal process is smoother and impurities can be separated from corn kernels more thoroughly, which greatly improves the impurity removal efficiency and ensures the purity of the corn harvest.

[0068] Reference Fig.10The swing rod 807 includes: a connecting portion, the connecting portion is rotatably connected to the outer wall of the conveyor belt 803, and the avoidance groove is located at the lower end of the connecting portion.

[0069] The turning portion is connected to the upper end of the connecting portion and extends eccentrically along the width direction of the inclined plate 804.

[0070] The extension part is connected to the free end of the turning part and is parallel to the inclined plate 804. The connection between the turning part and the extension part forms a trigger angle. In the initial state, the trigger member 808 and the trigger angle are on the same horizontal line. As the swing rod 807 moves, the trigger member 808 conflicts with the trigger angle to drive the swing rod 807 to rotate.

[0071] Specifically, in the initial state, the trigger angle of the swing rod 807 is on the same horizontal line as the trigger member 808. When a specific situation occurs during the operation of the conveyor belt 803, due to the initial horizontal correspondence between the trigger member 808 and the trigger angle, as the swing rod 807 moves, the trigger angle will gradually approach and collide with the swing rod 807; because the trigger member 808 applies a force to the trigger angle, and the connecting portion of the swing rod 807 is rotatably connected to the outer wall of the conveyor belt 803, under the action of this force, the swing rod 807 rotates around the connecting portion as the axis, wherein the turning portion is connected to the upper end of the connecting portion and extends eccentrically along the width direction of the inclined plate 804, it plays a role in changing the transmission direction and the point of action of the force, and the extension portion is parallel to the inclined plate 804. During the rotation of the swing rod 807, the sleeve 805 and the shaft portion 8045 can be driven to slide along the straight slot 8032.

[0072] See also Figure 5 , Figure 6 , Fig. 9 and Fig.10 A rotating shaft 809 extending along the thickness direction of the swing rod 807 is arranged on the side wall thereof. The rotating shaft 809 is fixed to the top surface of the conveyor belt 803 , and the swing rod 807 can rotate along the axis of the rotating shaft 809 itself.

[0073] Specifically, when the trigger member 808 drives the swing rod 807 to rotate and other related components move, the swing rod 807 can flexibly rotate around the rotating shaft 809; this rotation method enables the swing rod 807 to more accurately respond to the influence of the activation of the trigger member 808 and other related actions during the operation of the entire impurity removal device, thereby achieving more accurate action coordination and helping to more effectively handle impurities.

[0074] See also Figure 2-Figure 6 The screening plate 8 further includes: a plurality of bearing plates 801 , which are installed at intervals inside the corn harvester; and a trigger member 808 is fixedly installed on the top wall of the bearing plate 801 .

[0075] A plurality of conveying rollers 802 are rotatably disposed on the inner wall of the carrier plate 801 for supporting and guiding the conveying belt 803 , and a driving motor for driving the conveying rollers 802 to rotate is also disposed on the outer wall thereof.

[0076] Specifically, the supporting plate 801 provides a stable installation foundation for the entire screening plate 8, ensuring that the various components can work together accurately. The setting of the conveying roller 802 and the driving motor enables the conveyor belt 803 to operate effectively, ensuring that the inclined plate 804 can be transmitted along the designed path within the screening plate 8 for subsequent impurity removal processing.

[0077] See also Figure 5-Figure 8 The transmission belt 803 includes: a belt body 8031, and a meshing transmission is arranged on the conveying roller 802.

[0078] The shaft sleeve 805 is slidably connected inside the straight slot 8032 , and the shaft portion 8045 is rotatably connected inside the shaft sleeve 805 .

[0079] The push spring 806 is connected to one side of the shaft sleeve 805 , and one end of the push spring 806 away from the shaft sleeve 805 is connected to the side wall of the straight slot 8032 .

[0080] Specifically, the transmission belt 803 includes a belt body 8031, which is arranged on the conveying roller 802 through a meshing transmission to realize power transmission and rotate. When the belt body 8031 ​​is running, the sleeve 805 can have a certain sliding space in the straight groove 8032, and cooperate with the push spring 806. It can adapt to different working conditions and slight displacements between components to a certain extent, thereby ensuring the reliability and flexibility of the connection between the transmission belt 803 and components such as the inclined plate 804.

[0081] It should be noted that the setting of the sleeve 805 makes the sliding of the shaft portion 8045 inside the straight slot 8032 more stable, and the push spring 806 can be in a stable state when the inclined plate 804 is not triggered by the trigger member 808, and return to the initial state after the inclined plate 804 is triggered.

[0082] See also Figure 5 , Figure 6 , Figure 8 , Fig. 9 and Fig.10 The end of the shaft 8045 away from the inclined plate 804 is also connected to a transmission gear 8046, and a transmission rack 810 meshing with the transmission gear 8046 is provided on the inner wall of the supporting plate 801. When the trigger member 808 drives the swing rod 807 to rotate, the transmission gear 8046 meshes with the transmission rack 810.

[0083] It should be noted that: when the trigger member 808 drives the swing rod 807 to rotate, the transmission gear 8046 engages with the transmission rack 810, thereby realizing further transmission and conversion of power, driving the shaft 8045 to perform a specific rotation, and the shaft 8045 can drive the triggered inclined plate 804 to rotate. The rotation of the triggered inclined plate 804 can change the angle between it and another adjacent inclined plate 804, thereby further helping to discharge blocked impurities from the screening channel.

[0084] Through such a transmission structure, based on the action of the trigger member 808 triggering the swing rod 807 to rotate, the power transmission link is further expanded, so that different components in the device can work more closely together and achieve more complex action combinations, which helps to more effectively process impurities and improve the efficiency and effect of impurity removal.

[0085] See also Fig.10 A torsion spring 811 is also sleeved on the outside of the shaft 8045 , one end of the torsion spring 811 is connected to the side wall of the transmission gear 8046 , and the other end of the torsion spring 811 is connected to the side wall of the shaft sleeve 805 .

[0086] Specifically, during the operation of the device, when the transmission gear 8046 engages with or disengages from the transmission rack 810, the torsion spring 811 will deform accordingly and store or release energy.

[0087] The setting of the torsion spring 811 can play a role in buffering and resetting. When the meshing state between the transmission gear 8046 and the transmission rack 810 changes, it can make the related parts transition smoothly, reduce the impact and wear of the parts caused by sudden force changes, extend the service life of the device, help maintain the stability of the device operation, and ensure the continuous and effective impurity removal work. At the same time, when the transmission gear 8046 is engaged and separated from the transmission rack 810, the elastic force of the torsion spring 811 pushes the shaft 8045 to reset, thereby ensuring that the inclined plate 804 is reset and maintains the inclined state.

[0088] See also Figure 7 A miscellaneous material collecting bin 812 is also provided between the two opposite bearing plates 801 . The miscellaneous material collecting bin 812 is located below the inclined plate 804 . A third screw conveyor 813 is provided inside the miscellaneous material collecting bin 812 .

[0089] Specifically, a debris collection bin 812 is provided between two opposing support plates 801 and below the inclined plate 804 for collecting screened impurities. A third screw conveyor 813 is provided inside the debris collection bin 812 for conveying and transferring the collected impurities for subsequent processing.

[0090] The provision of the debris collection bin 812 and the third screw conveyor 813 enables effective collection and timely transfer of impurities, preventing the accumulation of impurities in the device from affecting the impurity removal effect and device operation, allowing the impurity removal work to be carried out continuously and efficiently, while also facilitating the centralized processing of impurities and reducing the workload and difficulty of manual cleaning.

[0091] See also Fig. 9 and Fig.11 The inclined plate 804 includes: a plate portion 8041, which is an inclined thin-sheet structure and has a plurality of grooves 8043 equidistantly formed thereon.

[0092] The plurality of sliding parts 8042 are in a straight strip structure and are slidably connected inside the groove body 8043 .

[0093] Specifically, during the operation of the device, the sliding part 8042 can slide in the tank body 8043. This slidable design makes the surface morphology of the inclined plate 804 no longer fixed, but can be dynamically adjusted according to the operating state of the device. When the conveyor belt 803 drives the inclined plate 804 to circulate, when the sliding part 8042 is facing downward, gravity begins to play a role. Due to the influence of gravity, the sliding part 8042 will slide out from the inside of the tank body 8043. This sliding changes the surface state of the inclined plate 804. For impurities such as corn silk that are slender and have good flexibility, their attachment conditions are destroyed. The surface of the traditional sieve plate is relatively flat and smooth, and corn silk is easy to attach to it. However, at this time, the surface of the inclined plate 804 becomes irregular due to the sliding of the sliding part 8042, which reduces the possibility of large-area close contact between corn silk and the inclined plate 804, thereby effectively avoiding the problem of corn silk attachment. This not only maintains the effective screening area of ​​the inclined plate 804, but also avoids the problem of reduced impurity removal efficiency caused by corn silk attachment.

[0094] During the operation of the device, the wind blown by the fan 7 plays an important role in the impurity removal process. It helps to blow impurities away from the screening area. When the inclined plate 804 moves to the bottom of the conveyor belt 803 along with the conveyor belt 803, if the shape of the inclined plate 804 is fixed, it may block the wind blown by the fan 7 and affect the effect of the wind on the impurities. Since the sliding part 8042 slides out of the trough body 8043 under the action of gravity, the structure of the inclined plate 804 becomes more "transparent", and the wind can pass through the inclined plate 804 more smoothly to reach the area where impurities need to be removed, ensuring that the fan 7 is not hindered in blowing and cleaning the impurities, further improving the impurity removal efficiency of the entire device. This design makes full use of gravity and the adjustable structure of the inclined plate 804 to optimize the impurity removal process from multiple aspects.

[0095] See also Fig.11A guide groove 8044 recessed inwardly is provided on the inner wall of the groove body 8043 in the length direction, and a guide block is provided on the side wall of the sliding part 8042, and the guide block slides along the guide groove 8044.

[0096] Specifically, when the sliding part 8042 slides in the groove body 8043, precise sliding control is achieved through the cooperation between the guide block and the guide groove 8044.

[0097] The setting of the guide groove 8044 and the guide block ensures the accuracy and stability of the sliding part 8042 sliding in the groove body 8043, making the surface morphology adjustment of the inclined plate 804 more reliable, and thus being able to more effectively adjust according to different impurity conditions, thereby ensuring the device's screening and separation effect on impurities and helping to improve impurity removal efficiency.

[0098] See also Fig. 9 and Fig.11 The length of the sliding portion 8042 is the same as that of the plate portion 8041. When the sliding portion 8042 is fully inserted into the groove body 8043, its end surface is higher than the end surface of the plate portion 8041, so that the top surface of the inclined plate 804 forms a serrated surface structure.

[0099] Specifically, when corn particles and impurities move on the inclined plate 804, the serrations can increase the friction between the corn particles and impurities and the surface of the inclined plate 804. The serrated surface can make it easier for corn particles to be blocked or change their direction of movement during movement. For impurities of a different size from corn particles, such as pebbles, broken soil, etc., they are more easily separated from the corn particles when passing through the serrated surface due to the difference in friction.

[0100] The presence of sawteeth can better screen the corn. During the winnowing process, the mixture of corn and impurities is blown by the wind on the serrated mesh. The sawteeth can place the corn and impurities in different layers or positions. Lighter impurities such as dust and broken shells are more easily blown up by the wind, while corn particles are less likely to be blown away by the wind due to the blocking and stratification effect of the sawteeth, thereby improving the efficiency of separating impurities and corn.

[0101] Working principle: corn is harvested by the cooperation of the harvester body 1, the harvesting device 2 and the traveling device 5. The harvested corn is transported to the inside of the threshing device 4 through the lifting channel 3, and then falls on the collecting plate 6 after threshing by the threshing device 4. The collecting plate 6 transports the corn to the screening plate 8. The fan 7 is arranged below the collecting plate 6, and its air outlet corresponds to the screening plate 8. The fan 7 is mainly used to generate airflow, and the lighter impurities such as chaff and broken leaves are blown away from the corn kernels through the airflow. The vibration motor generates vibration after starting, and this vibration is transmitted to the screening plate 8 through the vibration shaft, providing a power basis for the entire screening process, so that the corn on the screening plate 8 can be preliminarily loosened and separated under the action of vibration, thereby achieving the effect of corn screening.

[0102] The conveyor belt 803 is driven to rotate by a driving motor, and the conveyor belt 803 can drive the inclined plate 804 to continuously circulate. During the movement of the inclined plate 804, the swing rod 807 on its side wall will conflict with the trigger member 808. After the swing rod 807 is triggered by the trigger member 808, it will rotate, and the avoidance groove at one end of the swing rod will pull the shaft 8045 installed on the side wall of the inclined plate 804 to move horizontally along the conveyor belt 803. The movement of the shaft 8045 can drive the inclined plate 804 to move, thereby changing the distance between two adjacent inclined plates 804, thereby increasing the effect of increasing the screening channel, so that the inclined plate 804 can clean up the blocked impurities when it moves to the position of the trigger member 808 to avoid blockage of the screening channel. When the rod 807 rotates, the transmission gear 8046 meshes with the transmission rack 810, thereby realizing further transmission and conversion of power, driving the shaft 8045 to perform a specific rotation. The shaft 8045 can drive the triggered inclined plate 804 to rotate. The rotation of the triggered inclined plate 804 can change the angle between the other inclined plate 804 adjacent to it, and further help the blocked impurities to be discharged from the screening channel; through such a transmission structure, on the basis of the action of the trigger member 808 triggering the rotation of the swing rod 807, the power transmission link is further expanded, so that different components in the device can work more closely together to achieve a more complex action combination, which is conducive to more effective processing of impurities and improves the efficiency and effect of impurity removal.

[0103] As described above, although the present invention has been shown and described with reference to specific preferred embodiments, it should not be construed as limiting the present invention itself. Various changes may be made to it in form and detail without departing from the spirit and scope of the present invention as defined in the appended claims.

Claims

1. An automatic debris removal device for a corn harvester, characterized in that: include: A screening plate (8), the screening plate (8) comprising a plurality of conveyor belts (803), a plurality of inclined plates (804) being arranged on the conveyor belts (803), the inclined plates (804) being arranged equidistantly along the length direction of the conveyor belts (803), a plurality of straight slots (8032) being equidistantly arranged on the side end surface of the conveyor belt (803), shaft portions (8045) extending along the length direction thereof being arranged on both sides of the inclined plates (804), the shaft portions (8045) being inserted into corresponding straight slots (8032); The swing rod (807) is rotatably arranged on the outer wall of the conveyor belt (803); a avoidance groove is provided at the lower end of the swing rod (807); the groove extends along the length direction of the inclined plate (804); the shaft portion (8045) is movably inserted in the avoidance groove; an angle exists between the avoidance groove and the extension direction of the straight groove (8032); a trigger member (808) that can drive the swing rod (807) to rotate is provided on the moving path of the conveyor belt (803); the swing rod (807) is used to drive the corresponding inclined plate (804) to move along the extension direction of the straight groove (8032) after contacting the trigger member (808).

2. The automatic debris removal device for corn harvester according to claim 1, characterized in that: The swing lever (807) comprises: A connecting portion, the connecting portion being rotatably connected to the outer wall of the conveyor belt (803), and the avoidance groove being located at the lower end of the connecting portion; A turning portion, the turning portion being connected to the upper end of the connecting portion and extending eccentrically along the width direction of the inclined plate (804); An extension portion, the extension portion is connected to the free end of the turning portion and is parallel to the inclined plate (804), and a trigger angle is formed at the connection between the turning portion and the extension portion; in an initial state, the trigger member (808) and the trigger angle are on the same horizontal line, and as the swing rod (807) moves, the trigger member (808) contacts the trigger angle to drive the swing rod (807) to rotate.

3. The automatic debris removal device for corn harvester according to claim 2, characterized in that: A rotating shaft (809) extending in the thickness direction of the swing rod (807) is arranged on the side wall of the swing rod (807); the rotating shaft (809) is fixed to the top surface of the conveyor belt (803); and the swing rod (807) can rotate along the axis of the rotating shaft (809).

4. An automatic debris removal device for a corn harvester as claimed in any one of claims 1 to 3, characterized in that: The screening plate (8) further comprises: A plurality of bearing plates (801) are installed at intervals inside the corn harvester in a direction perpendicular to the length of the inclined plate (804); the trigger member (808) is fixedly installed on the top wall of the bearing plate (801); A plurality of conveying rollers (802) are rotatably arranged on the inner side wall of the carrying plate (801) and are used to support and guide the conveying belt (803). A driving motor for driving the conveying rollers (802) to rotate is also arranged on the outer wall.

5. The automatic debris removal device for corn harvester according to claim 4, characterized in that: The conveyor belt (803) comprises: The belt body (8031) is arranged on the conveying roller (802) in a meshing transmission; A shaft sleeve (805), wherein the shaft sleeve (805) is slidably connected to the interior of the straight slot (8032), and the shaft portion (8045) is rotatably connected to the interior of the shaft sleeve (805); A push spring (806) is connected to one side of the shaft sleeve (805), and one end of the push spring (806) away from the shaft sleeve (805) is connected to the side wall of the straight slot (8032).

6. The automatic debris removal device for corn harvester according to claim 5, characterized in that: One end of the shaft (8045) away from the inclined plate (804) is also connected to a transmission gear (8046); a transmission rack (810) meshing with the transmission gear (8046) is provided on the inner wall of the bearing plate (801); when the trigger member (808) drives the swing rod (807) to rotate, the transmission gear (8046) meshes with the transmission rack (810).

7. The automatic debris removal device for corn harvester according to claim 6, characterized in that: A torsion spring (811) is also sleeved on the outside of the shaft portion (8045), one end of the torsion spring (811) is connected to the side wall of the transmission gear (8046), and the other end of the torsion spring (811) is connected to the side wall of the shaft sleeve (805).

8. The automatic debris removal device for corn harvester according to claim 1, characterized in that: The inclined plate (804) comprises: The plate portion (8041) is in the form of an inclined thin sheet structure, on which a plurality of slots (8043) are evenly spaced; The plurality of sliding parts (8042) are in a straight strip structure and are slidably connected inside the groove body (8043).

9. The automatic debris removal device for corn harvester according to claim 8, characterized in that: An inwardly recessed guide groove (8044) is provided on the inner wall of the groove body (8043) in the length direction, and a guide block is provided on the side wall of the sliding portion (8042), and the guide block slides along the guide groove (8044).

10. The automatic debris removal device for corn harvester according to claim 9, characterized in that: The length of the sliding portion (8042) is the same as that of the plate portion (8041); when the sliding portion (8042) is fully inserted into the groove body (8043), its end surface is higher than the end surface of the plate portion (8041), so that the top surface of the inclined plate (804) forms a serrated surface structure.

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