Grain tank device of combine harvester

Abstract

The utility model belongs to the technical field of mechanical structures, and particularly relates to a grain tank device of a combine harvester, which comprises a tank body, a grain outlet cylinder and a lifting mechanism. The lifting mechanism comprises a portal frame guide mechanism and a driving mechanism, and the box body is mounted on the portal frame guide mechanism; the driving mechanism is mounted on the portal frame guide mechanism and cooperates with the portal frame guide mechanism to control the box body to ascend or descend; one end of the grain outlet cylinder is rotationally communicated and connected with one side of the bottom of the box body, and the rotating surface is perpendicular to the horizontal plane; a gate plate assembly is arranged at the other end of the grain discharging barrel. According to the technical scheme, the grain breakage rate is reduced by adopting a brand-new structural design; the grain discharging barrel can flexibly rotate to realize accurate grain unloading; the unloading process is optimized by the box body structure and the driving mechanism; the design of the flashboard assembly, the pulley and other assemblies provides convenient control experience.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical structure technology, specifically relating to a grain bin device for a combine harvester. Background Technology

[0002] In the field of mechanized agricultural harvesting, tracked combine harvesters play a crucial role, greatly improving crop harvesting efficiency. Currently, the grain unloading methods of existing tracked combine harvesters on the market mainly rely on screw conveyors or scrapers.

[0003] For screw conveyor-type grain bins, such as the Chinese patent document with application number 200920278750X, a longitudinal axial flow combine harvester unloading grain bin is disclosed, including a bin body, a screw conveyor, and a transmission device. The screw conveyor is installed between the front and rear side plates of the bin body; the front side plate has a grain outlet at the same height as the screw conveyor; the part of the screw conveyor extending out of the bin body is connected to the transmission device; the left and right side plates are fixed with inwardly inclined extension plates, and the extension plates fixed to the right side plates have at least one grain discharge port; the grain discharge plate corresponding to the grain discharge port is inserted into a bracket on the outside of the extension plate. When the harvested grain is small or only a small amount is needed, the grain can be discharged manually without the need for a grain truck to follow or the combine harvester's conveying device to be started. Moreover, there will be no large amount of residue in the grain bin after harvesting, eliminating the need for manual cleaning.

[0004] For scraper-type grain bins, such as Chinese patent document with application number 022515690, an improved self-propelled grain combine harvester is disclosed, which adopts a scraper-type grain bin structure. Specifically, the harvester includes a frame, header, engine, cab, grain bin, threshing device, cleaning device, grain conveying device, and self-unloading device. The threshing device consists of a front tangential roller and a rear tangential roller. It also includes a waste collection device, a waste conveying device, and a straw collection device. The waste collection device consists of a lower vibrating screen, a separator plate, and a waste collection trough. The waste conveying device consists of a lower horizontal waste conveying auger, a waste conveying scraper conveyor, and an upper horizontal waste conveying auger connected in series. The lower horizontal waste conveying auger is located in the waste collection trough, and the upper horizontal waste conveying auger is located above the front tangential roller. The straw collection device consists of a straw-collecting wheel, a straw collector, and a straw collection box connected in series behind the threshing device. This invention features good threshing effect, low grain loss, high unloading opening, and the ability to recover crop straw.

[0005] In practical applications, traditional unloading methods reveal numerous drawbacks when harvesting legumes such as soybeans, mung beans, and broad beans, which have relatively small grains and fragile skins. Screw conveyor unloading relies on the rotation of screw blades to move the grain; during this process, the legumes are subjected to continuous compression and friction, significantly increasing the breakage rate. Similarly, scraper unloading, due to the hard contact between the scraper and the grain bin wall and the grain, not only easily causes grain breakage during transport but also severely damages the crop's skin.

[0006] In specialized settings such as seed production and planting research, the integrity of seeds is of paramount importance. Seed breakage or damage to the seed coat directly impacts key indicators such as germination rate, growth vigor, and genetic stability, thereby interfering with seed purity and the accuracy of planting research. Clearly, existing unloading methods for tracked combine harvesters are insufficient to meet the urgent needs of these specific fields for damage-free grain unloading. A novel unloading technology that effectively reduces grain breakage and protects the crop coat is urgently required to fill this gap. Summary of the Invention

[0007] The purpose of this utility model is to address the shortcomings of the existing technology by proposing a grain bin device for a combine harvester, which reduces grain breakage rate, enables flexible and precise unloading, achieves an efficient unloading process, and provides a convenient operating experience. Its overall performance far surpasses that of traditional unloading methods.

[0008] The above objectives are achieved through the following technical solutions:

[0009] A grain bin device for a combine harvester includes a bin body, a grain outlet hopper, and a lifting mechanism; the lifting mechanism includes a gantry guide mechanism and a drive mechanism, and the bin body is mounted on the gantry guide mechanism; the drive mechanism is mounted on the gantry guide mechanism and works in conjunction with the gantry guide mechanism to control the bin body to rise or fall; one end of the grain outlet hopper is rotatably connected to one side of the bottom of the bin body, and the rotating surface is perpendicular to the horizontal plane; the other end of the grain outlet hopper is provided with a gate assembly.

[0010] Preferably, the box body includes an upper main compartment and a lower grain collection compartment integrally formed, and the lowest bottom structure of the lower grain collection compartment is located at the edge of the box body, and the grain discharge cylinder is connected to the lowest bottom structure of the lower grain collection compartment.

[0011] Preferably, the gate assembly includes a gate mounting base and a gate body; the gate mounting base is installed at the grain outlet of the grain discharge cylinder, and a first adapter port is provided on the gate mounting base corresponding to the grain outlet; the gate body is movably connected to the mounting base by a push-pull mechanism, and half of the gate body is a sealed part, while the other half is provided with a second adapter port corresponding to the grain outlet.

[0012] Preferably, the front end of the gate body is provided with a push-pull handle, and the rear end is provided with an anti-detachment limiting structure.

[0013] Preferably, the grain discharge hopper is provided with a rotating handle on its side.

[0014] Preferably, the gantry guiding mechanism includes a gantry base, a left gantry, a right gantry, and a grain bin support; the left gantry and the right gantry are arranged parallel to each other and are respectively vertically fixed to the gantry base; the two ends of the grain bin support are respectively slidably connected to the left gantry and the right gantry.

[0015] Preferably, the grain bin support includes a horizontal frame beam, a connecting vertical frame beam, and a reinforcing diagonal beam; one end of the horizontal frame beam is vertically fixedly connected to the connecting vertical frame beam, and the other end is slidably connected to the right gantry via a first pulley assembly; the connecting vertical frame beam is slidably connected to the left gantry via a second sliding assembly; and both ends of the reinforcing diagonal beam are respectively connected to the horizontal frame beam and the connecting vertical frame beam.

[0016] Preferably, the first pulley assembly includes a wheel seat, on which a second roller and a second limiting wheel are mounted; the second roller makes rolling contact with the bottom of the "U"-shaped guide groove on the right gantry; the two arc-shaped surfaces of the second limiting wheel respectively contact the inner two side walls of the "U"-shaped guide groove.

[0017] Preferably, the second sliding assembly includes a slide block, and a first roller and a set of limiting wheels are provided at the bottom of the groove on the inner side of the slide block; the first roller makes rolling contact with the right side of the "┨"-shaped vertical guide rail provided by the left gantry; each set of limiting wheels includes two symmetrically arranged first limiting wheels, which are respectively installed on the inner side groove walls of the slide block, and the two first limiting wheels make rolling contact with the left side of the "┨"-shaped vertical guide rail.

[0018] Preferably, the drive mechanism includes a hydraulic cylinder, a mounting bracket, and a lifting chain; the hydraulic cylinder is mounted on the gantry base, the mounting bracket is fixedly connected to the actuating shaft of the hydraulic cylinder, and a sprocket is mounted on the mounting bracket; one end of the lifting chain is fixedly connected to the grain bin bracket, and the other end of the lifting chain passes around the sprocket and is fixedly connected to the left gantry via a crossbeam.

[0019] This technical solution has the following beneficial effects:

[0020] 1) Reduced grain breakage rate. Compared to traditional screw conveyor and scraper unloading methods, the grain bin device of this combine harvester adopts a completely new structural design, where the conveying machinery does not directly contact the grain. When dealing with legumes such as soybeans, mung beans, and broad beans, which have small grains and fragile skins, this design avoids grain breakage caused by the rotating and squeezing action of the screw blades or the hard scraping action of the scraper, greatly reducing the grain breakage rate and ensuring the integrity of the grain during unloading. This is especially crucial for special scenarios with extremely high requirements for seed quality, such as seed production and planting research, effectively maintaining key indicators such as seed germination rate, growth vigor, and genetic stability, ensuring seed purity and the accuracy of planting research.

[0021] 2) Flexible and precise grain unloading. One end of the grain discharge hopper is rotatably connected to the bottom of the container, and the rotating surface is perpendicular to the horizontal plane. With the rotating handle on the side, the operator can easily rotate the grain discharge hopper to the optimal unloading angle according to the actual situation such as the position and height of the transport vehicle, so as to achieve precise grain unloading. This adapts to different field operation environments and transport needs. Compared with traditional grain unloading methods, it greatly improves the flexibility and accuracy of grain unloading and reduces grain spillage and waste.

[0022] 3) Efficient unloading process. The unloading box adopts an integrated upper main compartment and lower grain collection compartment structure. The lowest structure of the lower grain collection compartment is located at the edge of the box and connected to the grain discharge hopper, which can efficiently collect grain to the inlet of the grain discharge hopper, avoiding grain accumulation and blockage inside the box, optimizing the unloading process and shortening the unloading time. At the same time, the hydraulic cylinder in the drive mechanism provides powerful force, which, together with the gantry guide mechanism, enables the box to be raised and lowered to the appropriate height quickly and smoothly, further improving the efficiency of the entire unloading process. Compared with the traditional unloading method that relies on a single conveying structure, it reduces waiting time and improves the overall operating efficiency of the combine harvester in the field.

[0023] 4) Convenient Operation Experience. The gate assembly is ingeniously designed. The push-pull handle at the front is ergonomically designed, allowing operators to easily push and pull the gate body for precise control of grain flow. The anti-detachment limit structure at the rear ensures stable operation of the gate in complex working environments, preventing it from detaching due to vibration, collision, or other unexpected situations, thus ensuring a safe and orderly unloading process. The grain tank support and gantry guide mechanism are connected by a carefully designed pulley assembly and sliding assembly. For example, the second roller and second limit wheel of the first pulley assembly precisely cooperate with the "U"-shaped guide groove of the right gantry, and the first roller and limit wheel group of the second sliding assembly work in coordination with the "┨"-shaped vertical guide rail of the left gantry. This makes the lifting and lowering of the grain tank support smooth and effortless, providing operators with great convenience during grain loading and unloading. The overall operation experience far surpasses that of traditional grain unloading devices. Attached Figure Description

[0024] Figure 1A schematic diagram of the axonal structure of the grain bin device when it is lowered to a low position;

[0025] Figure 2 A schematic diagram of the axonal structure of the grain bin device raised to a high position;

[0026] Figure 3 for Figure 2 A schematic diagram of the front structure;

[0027] Figure 4 for Figure 3 Schematic diagram of the cross-sectional structure in the BB direction;

[0028] Figure 5 for Figure 2 A schematic diagram of the structure on the right side;

[0029] Figure 6 for Figure 5 A schematic diagram of the AA-direction cross-section structure;

[0030] Figure 7 This is a schematic diagram of the axonometric structure of the grain bin support;

[0031] Figure 8 This is a top view of the grain bin support structure with the bin housing installed.

[0032] in:

[0033] 1. Container body; 1.1. Upper main bin; 1.2. Lower grain collection bin; 2. Grain discharge hopper; 3. Rotary handle; 4. Gate assembly; 4.1. Gate mounting base; 4.2. Gate body; 4.21. Sealing part; 4.22. Second adapter port; 4.23. Push-pull handle; 4.24. Anti-detachment limiting structure; 5. Gantry base; 6. Left gantry; 6.1. First support column; 6.2. First top crossbeam; 6.3. "┨" shaped vertical guide rail; 7. Right gantry; 7.1. Second support column; 7 7.2 Second top crossbeam; 7.3 "U" shaped guide groove; 8. Grain box bracket; 8.1 Installation crossbeam; 8.2 Connecting vertical crossbeam; 8.3 Reinforcing diagonal beam; 8.4 First pulley assembly; 8.41 Wheel seat; 8.42 Second roller; 8.43 Second limit wheel; 8.5 Second sliding assembly; 8.51 Slide seat; 8.52 First roller; 8.53 First limit wheel; 9. Hydraulic cylinder; 10. Mounting frame; 11. Lifting chain; 12. Sprocket; 13. Force-bearing crossbeam. Detailed Implementation

[0034] To make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of the utility model, but not all embodiments.

[0035] Therefore, the following detailed description of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0036] In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. 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.

[0037] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "fitting," "connection," and "fixing," etc., 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, a direct connection, or an indirect connection through an intermediate medium; or 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 according to the specific circumstances.

[0038] Example 1

[0039] This embodiment discloses a grain bin device for a combine harvester, as a preferred implementation of this technical solution, such as... Figure 1 As shown, it includes a housing 1, a grain outlet 2, and a lifting mechanism.

[0040] The lifting mechanism includes a gantry guide mechanism and a drive mechanism, with the container 1 mounted on the gantry guide mechanism. The gantry guide mechanism, as the basic structure for the container 1, provides a stable guide path for its lifting, ensuring smooth vertical movement and preventing swaying or deviation, thus guaranteeing the stability and reliability of the entire device during operation. The drive mechanism is the power source for lifting the container 1, precisely controlling its ascent and descent in conjunction with the gantry guide mechanism to meet the height requirements of the container 1 in different operating scenarios, allowing for flexible adjustments whether loading or unloading grain.

[0041] One end of the grain dispensing hopper 2 is rotatably connected to one side of the bottom of the housing 1, and the rotating surface is perpendicular to the horizontal plane. This unique connection method allows the grain dispensing hopper 2 to be adjusted at multiple angles in space. When not in use, it can remain perpendicular to the ground, saving space and making it easy to store; when unloading grain is required, it can be flexibly rotated to a suitable angle to adapt to the requirements of different unloading positions.

[0042] At the other end of the grain discharge hopper 2, a gate assembly 4 is provided. The gate assembly 4 acts as a flow control valve. By adjusting the opening and closing degree of the gate, the speed and flow rate of grain can be precisely controlled to ensure that the grain falls accurately into the target location (such as on a transfer vehicle) and to avoid grain scattering and waste.

[0043] Based on the above structure, when grain needs to be loaded into the container 1, the lifting mechanism functions to lower the container 1 to its lowest position. This design facilitates the direct transport of grain from other parts of the harvester (such as the threshing device) into the container 1. At this time, the grain discharge hopper 2, being vertical to the ground, will not obstruct the grain loading process, making the entire grain loading process efficient and smooth.

[0044] When unloading grain is required, the drive mechanism, in conjunction with the gantry guiding mechanism, first activates to lift the container 1 to a specific height, typically between 1.5 and 1.8 meters. This height is carefully considered, facilitating the natural flow of grain under gravity while also being compatible with the height of common transfer vehicles, reducing the difficulty of subsequent manual handling. Next, the grain discharge hopper 2 is rotated to the required unloading angle. Combined with the previously raised container 1 height, the grain flows naturally down the discharge hopper 2 using gravitational potential energy. Finally, the operator flexibly adjusts the gate assembly 4 according to the location and capacity of the transfer vehicle, precisely controlling the landing point and flow rate of the grain into the transfer vehicle, achieving rapid and orderly unloading.

[0045] This technical solution employs a lifting mechanism to elevate the grain container 1, thereby achieving high-altitude grain transport. Throughout the process, the absence of powered mechanical conveying cleverly avoids damage caused by compression and friction. The grain remains in a relatively stable and natural stacking state within the container 1, minimizing grain breakage. This not only ensures the immediate quality of the harvested grain but also has significant implications for subsequent processing and sales, effectively enhancing the economic value and market competitiveness of the grain, further highlighting the innovation and superiority of this combine harvester grain container device.

[0046] Furthermore, based on the aforementioned structure, this technical solution supports a compact grain loading and unloading process. The seamless coordination between the lifting mechanism and the grain outlet hopper 2 significantly shortens the overall operation time, improves the combine harvester's efficiency in the field, and reduces the waiting time for grain transfer after harvest. The adjustable height of the lifting mechanism and the multi-angle rotation of the grain outlet hopper 2 allow the device to adapt to different models of transfer vehicles and various field operating environments. Whether on a large, flat farm or a small plot of farmland with slightly undulating terrain, it can accurately unload grain, meeting diverse usage needs. The gate assembly 4 provides precise control over the grain flow, avoiding grain waste during unloading and ensuring the safety and orderliness of the transfer process, laying a solid foundation for subsequent grain storage and processing.

[0047] Example 2

[0048] This embodiment discloses a grain bin device for a combine harvester. As a preferred implementation of this technical solution, based on embodiment 1, its bin 1 includes an upper main bin 1.1 and a lower grain collection bin 1.2 integrally formed.

[0049] The upper main hopper 1.1 is used for large-area, large-capacity storage of harvested grain. With its spacious interior, it can reduce the number of times grain is unloaded during the harvesting process and improve the continuity of operations.

[0050] The lowest structure of the lower grain collection bin 1.2 is located at the edge of the container 1, and the grain discharge hopper 2 is tightly connected to the bottom structure of the lower grain collection bin 1.2. Its main function is to efficiently collect the grain in the container 1, especially the grain scattered by gravity in the upper main bin 1.1, at the inlet of the grain discharge hopper 2. Through this structural design, when unloading is required, the grain can naturally and smoothly enter the grain discharge hopper 2 along the inclined angle of the bottom of the collection bin, avoiding the problem of grain accumulating and clogging inside the container 1 and failing to flow out smoothly, further optimizing the unloading process.

[0051] Example 3

[0052] This embodiment discloses a grain bin device for a combine harvester. As a preferred implementation of this technical solution, based on embodiment 1 or 2, its gate assembly 4 includes a gate mounting base 4.1 and a gate body 4.2.

[0053] The gate mounting base 4.1 is typically made of high-strength, corrosion-resistant metal, such as stainless steel, to ensure structural stability even after prolonged contact with grain and exposure to complex outdoor environments. The gate mounting base 4.1 is installed at the grain outlet of the grain discharge hopper 2 and serves as the solid base for the entire gate assembly 4. A first fitting opening is provided on the gate mounting base 4.1 according to the precise dimensions and shape of the grain outlet, ensuring a high degree of fit and effectively preventing grain leakage or jamming due to gaps.

[0054] The gate body 4.2 is connected to the mounting base via a push-pull mechanism. This connection method ensures both ease of operation and precise positioning of the gate body 4.2 during movement. The gate body 4.2 features a unique and ingenious structural design, with one half being a sealing section 4.21 and the other half having a second adapter port 4.22 corresponding to the grain outlet.

[0055] Based on the above structure, when it is necessary to completely block the grain outflow, the operator pushes the gate body 4.2 backward to its extreme position. At this time, the sealing part 4.21 of the gate body 4.2 fits tightly with the first adapter on the gate mounting base 4.1, blocking the downward path of the grain after it flows out of the grain outlet. It can accurately and instantly stop the flow in any scenario, whether it is equipment movement, temporary cessation of grain unloading, or maintenance and repair.

[0056] During the unloading process, operators can precisely adjust the grain flow rate based on dynamic factors such as the loading progress and capacity requirements of the transfer vehicle. By gradually pulling the gate body 4.2 forward, the second adapter port 4.22 gradually overlaps with the first adapter port. As the pulling stroke steadily increases, the overlapping area continues to increase, and the grain outflow channel also steadily widens. When the second adapter port 4.22 gradually and completely overlaps with the first adapter port, the grain outlet channel reaches its maximum unobstructed state, and the grain flow rate reaches its peak, enabling the grain to be unloaded into the transfer vehicle as quickly as possible, meeting the urgent need for efficient grain unloading.

[0057] Example 4

[0058] This embodiment discloses a grain bin device for a combine harvester. As a preferred implementation of this technical solution, based on embodiment 3, the front end of the gate body 4.2 is provided with a push-pull handle 4.23 and the rear end is provided with an anti-detachment limiting structure 4.24.

[0059] The push-pull handle 4.23 features a highly user-friendly design. Its rounded, curved shape conforms to the natural grip curve of the hand, and its surface is covered with fine, deep anti-slip textures. These textures are made using a special rubber injection molding process, ensuring sufficient friction for the operator's hand to maintain a firm grip even in outdoor working environments covered in dust, dew, or rain. This allows for easy and precise control of the gate body 4.2's push-pull action, greatly improving operational convenience and accuracy.

[0060] The anti-detachment limiting structure 4.24 is a key line of defense to ensure the stable operation of the gate assembly 4. When the gate body 4.2 is pushed or pulled, in extreme situations such as unexpected strong impact or severe equipment vibration, the limiting block, together with the rubber pad, can effectively buffer and prevent the gate body 4.2 from continuing to move, preventing it from detaching from the gate mounting seat 4.1. This ensures that the entire gate assembly 4 remains stable under complex and changing operating conditions, eliminating the potential for grain leakage and other malfunctions caused by gate detachment, and safeguarding the continuous and smooth progress of grain unloading operations.

[0061] Example 5

[0062] This embodiment discloses a grain bin device for a combine harvester. As a preferred implementation of this technical solution, based on embodiment 3 or 4, the grain outlet 2 is a key component of the combine harvester's grain bin device for directional grain transfer, and its flexible rotation function is crucial for accurate grain unloading. To facilitate easy operation by the operator, a rotating handle 3 is specially provided on the side of the grain outlet 2.

[0063] The rotary handle 3 is designed with ergonomic principles in mind. Its overall shape is a slightly curved column with a moderate length, allowing the operator to grip it in the most comfortable and effortless posture. The handle surface has a frosted finish, which not only increases the friction between the hand and the handle, but also ensures a firm grip even when the operator's hands are sweaty or dusty, preventing slippage. Moreover, the frosted surface feels gentle on the skin and will not cause discomfort, reducing fatigue even during prolonged use.

[0064] When the discharge hopper 2 needs to be rotated, the operator only needs to hold the handle 3 and apply appropriate torque with the strength of their arm to smoothly drive the discharge hopper 2 to rotate around the connection between it and the bottom of the housing 1. Whether adjusting the discharge hopper 2 from a vertical storage state to the tilt angle required for unloading, or making real-time fine adjustments according to slight changes in the position of the transport vehicle, the handle 3 provides a reliable point of leverage for the operator, making the entire rotation operation of the discharge hopper 2 convenient and efficient, further optimizing the unloading process of the combine harvester and improving operational efficiency.

[0065] Example 6

[0066] This embodiment discloses a grain bin device for a combine harvester. As a preferred implementation of this technical solution, based on any one of embodiments 1 to 5, its gantry guiding mechanism includes a gantry base 5, a left gantry 6, a right gantry 7, and a grain bin support 8.

[0067] The gantry base 5, as the foundation of the entire structure, plays a crucial role in bearing the weight of the upper structure and resisting external impacts. It is typically welded from thick-walled, high-strength steel and equipped with multiple precisely positioned mounting holes. The diameter and spacing tolerances of these mounting holes are controlled within a very small range, facilitating a firm and precise connection with the harvester body and providing a stable and reliable support platform for the upper gantry structure.

[0068] The left gantry 6 and right gantry 7 are cut and welded from high-quality channel steel. They are arranged parallel to each other and vertically fixed to the gantry base 5. This not only results in a neat appearance but also provides superior bending strength and vertical load-bearing capacity, easily handling the immense pressure of a fully loaded grain tank. The connection between the left gantry 6 and right gantry 7 and the gantry base 5 can be achieved by welding or using high-strength bolts. Precise torque tightening ensures a vertical fixation, guaranteeing reliable connection and facilitating quick disassembly and reassembly during routine maintenance and emergency repairs.

[0069] The grain bin support 8, as a direct component supporting the grain bin 1, features a unique and ingenious connection to the left gantry 6 and right gantry 7. Both ends are slidably connected to the left gantry 6 and right gantry 7 respectively, with the connection design fully considering both smoothness and precise guidance. Two sliding connection methods are available: First, a specially designed wear-resistant engineering plastic roller device with a low coefficient of friction allows the grain bin support 8 to slide easily during lifting and lowering, while also having sufficient load-bearing capacity to support the weight of the grain bin and grain without easily deforming; second, a slider guide rail structure is used, with the guide rail made of hard alloy material, possessing high surface hardness and strong wear resistance, and matched with a suitable slider.

[0070] Example 7

[0071] This embodiment discloses a grain bin device for a combine harvester. As a preferred implementation of this technical solution, based on embodiment 6, the grain bin support 8 includes a horizontal frame beam 8.1, a connecting vertical frame beam 8.2, and a reinforcing diagonal beam 8.3.

[0072] One end of the horizontal frame beam 8.1 is vertically and fixedly connected to the vertical frame beam 8.2, forming a stable right-angle support structure to ensure overall rigidity. The other end is slidably connected to the right-side gantry 7 via the first pulley assembly 8.4. The first pulley assembly 8.4 is finely constructed, and the pulley body is made of high-strength nylon material with embedded precision ball bearings. It has excellent wear resistance, can withstand the frictional wear caused by frequent lifting and lowering of the grain tank, and can achieve smooth rolling with an extremely low coefficient of friction, ensuring that the horizontal frame beam 8.1 slides smoothly and efficiently on the right-side gantry 7.

[0073] The connecting vertical frame beam 8.2 is slidably connected to the left gantry 6 via the second sliding assembly 8.5. The design of the second sliding assembly 8.5 is also meticulous. It uses a combination of hardened stainless steel guide rails and a suitable slider. The slider has a self-lubricating device inside, which ensures that the connecting vertical frame beam 8.2 and the left gantry 6 fit tightly and are precisely guided. At the same time, it can maintain smooth movement in high temperature and humid environments, avoiding jamming and providing stable support for the lifting and lowering of the grain tank support 8.

[0074] The reinforcing diagonal beam 8.3 is connected at both ends to the mounting horizontal frame beam 8.1 and the connecting vertical frame beam 8.2, respectively. It typically employs a triangular stabilizing structure design, utilizing mechanical principles to disperse and transmit pressure from the box body 1, greatly enhancing the overall pressure resistance of the grain box support 8. The reinforcing diagonal beam 8.3 is mostly made of high-strength alloy steel, which, after heat treatment, possesses both high strength and good toughness, preventing breakage under heavy pressure or sudden impact, thus comprehensively ensuring the stability of the grain box support 8 and the entire grain box device.

[0075] Example 8

[0076] This embodiment discloses a grain bin device for a combine harvester. As a preferred implementation of this technical solution, based on embodiment 6, the grain bin support 8 includes a mounting horizontal frame beam 8.1, a connecting vertical frame beam 8.2, and a reinforcing diagonal beam 8.3. One end of the mounting horizontal frame beam 8.1 is vertically fixedly connected to the connecting vertical frame beam 8.2, and the other end is slidably connected to the right gantry 7 via a first pulley assembly 8.4. The connecting vertical frame beam 8.2 is slidably connected to the left gantry 6 via a second sliding assembly 8.5. Both ends of the reinforcing diagonal beam 8.3 are respectively connected to the mounting horizontal frame beam 8.1 and the connecting vertical frame beam 8.2. The first pulley assembly 8.4 and the second pulley assembly are wear-resistant engineering plastic roller devices specially designed for this technical solution.

[0077] First, a vertical guide rail with a "┨" shaped cross-section is installed on the left gantry 6. Based on this, the second pulley assembly includes a slide block 8.51, which is made of U-shaped steel and possesses good structural strength and guiding properties. The inner groove bottom of the slide block 8.51 is equipped with a first roller 8.52 that rolls in contact with the right side of the "┨" shaped vertical guide rail 6.3. One or more first rollers 8.52 can be installed according to actual load-bearing and smoothness requirements. They are typically made of high-hardness, low-friction alloy steel, with a surface hardening treatment, making them wear-resistant and ensuring smooth rolling. In addition, at least one set of limiting wheel assemblies is installed on the slide block 8.51. Each limiting wheel assembly includes two symmetrically arranged first limiting wheels 8.53, which are respectively installed on the inner two sides of the groove wall of the slide block 8.51. The two first limiting wheels 8.53 respectively roll in contact with the left side of the "┨" shaped vertical guide rail 6.3. Therefore, the first roller 8.52 works in conjunction with the limit wheel assembly to precisely constrain the second pulley assembly from both left and right directions using the mechanical limit principle, preventing it from moving left and right on the left gantry 6; the two first limit wheels 8.53 in the limit wheel assembly work together to lock the guide rail from the front and back directions, preventing the second pulley assembly from moving back and forth on the left gantry 6, thus ensuring the accuracy and stability of the connecting vertical beam sliding on the left gantry 6 in all directions.

[0078] Secondly, the right-side gantry 7 is provided with a U-shaped guide groove. Based on this, the first pulley assembly 8.4 includes a wheel seat 8.41, on which a second roller 8.42 and a second limiting roller 8.43 are mounted. The second roller 8.42 rolls in contact with the bottom of the U-shaped guide groove 7.3 on the right-side gantry 7. This design allows the second roller 8.42 to roll smoothly at the bottom of the groove, effectively bearing part of the weight of the grain bin support 8 during its vertical sliding, reducing friction and improving sliding efficiency. The two curved surfaces of the second limiting roller 8.43 contact the inner walls of the U-shaped guide groove 7.3, respectively. Utilizing the friction generated by the close contact and the principle of mechanical blocking, the first pulley assembly 8.4 is precisely prevented from moving back and forth, ensuring that the mounting crossbeam 8.1 slides smoothly on the right-side gantry 7 without deviation.

[0079] Example 9

[0080] This embodiment discloses a grain bin device for a combine harvester. As a preferred implementation of this technical solution, based on embodiments 6, 7, 8, or 9, its left gantry 6 includes two parallel first support columns 6.1. The bottoms of the two first support columns 6.1 are fixedly connected to the gantry base 5, specifically by welding or high-strength bolts. The tops of the two first support columns 6.1 are fixedly connected by a first top crossbeam 6.2. The first top crossbeam 6.2 is also made of high-quality steel with exquisite welding technology to ensure the rigidity of the overall frame. Furthermore, the horizontal cross-section of the first support column 6.1 is "┠┨" shaped. This unique shape is specifically designed for the second pulley assembly, providing it with a "┨" shaped vertical guide rail, i.e., a "┨" shaped vertical guide rail 6.3.

[0081] Furthermore, the right-side gantry 7 includes two parallel second support columns 7.1. The bottoms of the two second support columns 7.1 are fixedly connected to the gantry base 5, in a connection method similar to that of the left-side gantry 6, ensuring structural stability. The tops of the two second support columns 7.1 are fixedly connected by a second top crossbeam 7.2, forming a stable frame. The second support columns 7.1 are made of U-shaped steel, forming a groove-like space inside, namely a "U"-shaped guide groove 7.3, which facilitates the installation and operation of the first pulley assembly 8.4.

[0082] Example 10

[0083] This embodiment discloses a grain bin device for a combine harvester. As a preferred implementation of this technical solution, based on embodiments 6, 7, 8 or 9, its drive mechanism includes a hydraulic cylinder 9, a mounting frame 10 and a lifting chain 11.

[0084] Hydraulic cylinder 9 is mounted on the gantry base 5, serving as the power foundation of the entire drive mechanism. It typically uses a high-strength alloy steel cylinder body with a finely ground inner wall to ensure sealing during piston reciprocating motion, effectively preventing hydraulic oil leakage and guaranteeing stable power output. Its piston rod undergoes a heat treatment process, possessing excellent toughness and wear resistance, capable of withstanding prolonged, high-intensity push-pull loads. Hydraulic cylinder 9 is precisely designed with a suitable stroke based on the harvester's operational requirements, sufficient to meet the lifting and lowering requirements of the harvester body 1 from its lowest loading position to its highest unloading position. During field operations, the hydraulic system precisely controls the flow and pressure of the hydraulic oil to drive the piston rod of the cylinder, providing reliable and stable power for the lifting and lowering of the harvester body 1.

[0085] The mounting frame 10 features a unique "T"-shaped design. This shape not only optimizes structural strength but also facilitates the installation of the sprockets 12 and the layout of the lifting chains 11. Its bottom is fixedly connected to the actuating shaft of the hydraulic cylinder 9 using high-strength bolts, ensuring a secure connection and precise transmission of the cylinder's thrust. Sprockets 12 are mounted at both ends of the top, with each sprocket 12 corresponding to a lifting chain 11. This symmetrical layout ensures a more even distribution of force, effectively preventing component wear or jamming caused by uneven force distribution. The mounting frame 10 is manufactured using a welding process and is made of high-quality carbon steel, ensuring strength while possessing a certain degree of flexibility to withstand the vibrations and impacts generated when the harvester operates in complex terrain.

[0086] The lifting chain 11, a key transmission component connecting the grain tank support 8 with the sprocket 12 and the left gantry 6, is fixedly connected to the grain tank support 8 at one end using a specially designed high-strength connecting pin to ensure a reliable connection that will not loosen or break under heavy loads. The other end of the lifting chain 11, after passing over the sprocket 12, is fixedly connected to the left gantry 6 via the force-bearing beam 13. The force-bearing beam 13, also made of high-strength steel, is welded to an appropriate position on the left gantry 6, providing a stable point of force for the lifting chain 11. The lifting chain 11 itself is made of high-strength alloy steel, with precision-forged links and a rust-proof surface, exhibiting excellent tensile strength and wear resistance, enabling it to work stably for extended periods in harsh field environments. When the hydraulic cylinder 9 drives the mounting frame 10 to rise or fall, the sprocket 12 rotates accordingly, driving the lifting chain 11 to move, thereby pulling the grain tank support 8 smoothly up and down along the gantry guide mechanism, achieving precise positioning of the grain tank 1.

Claims

1. A grain bin device for a combine harvester, characterized in that: It includes a box body (1), a grain outlet (2) and a lifting mechanism; the lifting mechanism includes a gantry guide mechanism and a drive mechanism, and the box body (1) is installed on the gantry guide mechanism; the drive mechanism is installed on the gantry guide mechanism and works with the gantry guide mechanism to control the box body (1) to rise or fall; one end of the grain outlet (2) is rotatably connected to one side of the bottom of the box body (1), and the rotating surface is perpendicular to the horizontal plane; the other end of the grain outlet (2) is provided with a gate assembly (4).

2. The grain bin device for a combine harvester as described in claim 1, characterized in that: The box body (1) includes an upper main compartment (1.1) and a lower grain collection compartment (1.2) that are integrally formed. The lowest bottom structure of the lower grain collection compartment (1.2) is located at the edge of the box body (1), and the grain discharge cylinder (2) is connected to the lowest bottom structure of the lower grain collection compartment (1.2).

3. The grain bin device for a combine harvester as described in claim 1, characterized in that: The gate assembly (4) includes a gate mounting base (4.1) and a gate body (4.2); the gate mounting base (4.1) is installed at the grain outlet of the grain discharge cylinder (2), and a first adapter port is provided on the gate mounting base (4.1) corresponding to the grain outlet; the gate body (4.2) is connected to the mounting base by a push-pull motion, and one half of the gate body (4.2) is a sealing part (4.21), and the other half is provided with a second adapter port (4.22) corresponding to the grain outlet.

4. The grain bin device for a combine harvester as described in claim 3, characterized in that: The front end of the gate body (4.2) is provided with a push-pull handle (4.23), and the rear end is provided with an anti-detachment limiting structure (4.24).

5. The grain bin device for a combine harvester as described in claim 3, characterized in that: The side of the grain discharge cylinder (2) is provided with a rotating handle (3).

6. The grain bin device for a combine harvester as described in claim 1, characterized in that: The gantry guiding mechanism includes a gantry base (5), a left gantry (6), a right gantry (7), and a grain bin support (8); the left gantry (6) and the right gantry (7) are arranged parallel to each other and are vertically fixedly connected to the gantry base (5); the two ends of the grain bin support (8) are slidably connected to the left gantry (6) and the right gantry (7), respectively.

7. The grain bin device for a combine harvester as described in claim 6, characterized in that: The grain bin support (8) includes a horizontal frame beam (8.1), a vertical frame beam (8.2), and a reinforcing diagonal beam (8.3). One end of the horizontal frame beam (8.1) is vertically fixed to the vertical frame beam (8.2), and the other end is slidably connected to the right gantry (7) via a first pulley assembly (8.4). The vertical frame beam (8.2) is slidably connected to the left gantry (6) via a second sliding assembly (8.5). Both ends of the reinforcing diagonal beam (8.3) are respectively connected to the horizontal frame beam (8.1) and the vertical frame beam (8.2).

8. The grain bin device for a combine harvester as described in claim 7, characterized in that: The first pulley assembly (8.4) includes a wheel seat (8.41), on which a second roller (8.42) and a second limiting roller (8.43) are mounted; the second roller (8.42) rolls in contact with the bottom of the "U"-shaped guide groove (7.3) on the right side gantry (7); the two arc-shaped surfaces of the second limiting roller (8.43) respectively contact the inner two side walls of the "U"-shaped guide groove (7.3).

9. The grain bin device for a combine harvester as described in claim 7, characterized in that: The second sliding assembly (8.5) includes a slide block (8.51), and a first roller (8.52) and a set of limiting wheels are provided on the bottom of the groove inside the slide block (8.51). The first roller (8.52) makes rolling contact with the right side of the "┨" shaped vertical guide rail (6.3) provided by the left gantry (6). Each set of limiting wheels includes two symmetrically arranged first limiting wheels (8.53) installed on the inner side groove walls of the slide block (8.51), and the two first limiting wheels (8.53) make rolling contact with the left side of the "┨" shaped vertical guide rail (6.3).

10. The grain bin device for a combine harvester as described in claim 6, characterized in that: The drive mechanism includes a hydraulic cylinder (9), a mounting bracket (10), and a lifting chain (11). The hydraulic cylinder (9) is mounted on the gantry base (5), and the mounting bracket (10) is fixedly connected to the actuation shaft of the hydraulic cylinder (9). A sprocket (12) is mounted on the mounting bracket (10). One end of the lifting chain (11) is fixedly connected to the grain box bracket (8), and the other end of the lifting chain (11) is fixedly connected to the left gantry (6) through the force beam (13) after passing around the sprocket (12).

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