A harvester grain tank capable of automatic grain unloading

Abstract

The utility model belongs to the agricultural machinery technical field, we propose a kind of automatic unloading grain's harvester granary, including granary and conveying mechanism, granary is arranged at the rear of harvester, hopper cavity is arranged in granary to collect grain, the inner cavity lower part of hopper cavity is provided with spiral feeder, the bottom of hopper cavity is provided with inclined downward discharge channel, the bottom of discharge channel is connected conveying channel;Conveying channel is horizontally arranged, and the right end of conveying channel is provided with discharge gate;Discharge gate is provided with inclined downward discharge hopper;This scheme can improve the smoothness of discharging, prevent arching and blockage, greatly reduce the friction coefficient of grain and bin wall, accelerate the gravity discharge of grain;At the same time, the arc transition section of the bottom of hopper cavity and discharge channel reduces the flow resistance of grain.In addition, the spiral feeder adopts variable-diameter blade design, the upper small-diameter blade guides the convergence of grain, and the lower large-diameter blade enhances the pushing force, so that manual intervention cleaning is not needed, and the continuity of operation is ensured.

Description

Technical Field

[0001] This utility model relates to the field of agricultural machinery technology, specifically to a harvester grain bin that can automatically unload grain. Background Technology

[0002] In mechanized agricultural harvesting operations, the harvester's grain bin is a core component for temporary grain storage and transfer. Its unloading efficiency, stability, and degree of automation directly affect the overall harvesting efficiency. Especially in large-scale farmland operations, performance defects in the grain bin can easily lead to problems such as operation interruption and grain loss.

[0003] Existing combine harvester grain bins generally have some defects, such as: Traditional straight-walled or slightly tapered silos for direct grain discharge are prone to grain bridging and blockage, especially in humid or high-impurity conditions. Grain accumulation and failure to discharge are frequent occurrences, requiring manual intervention to clear the blockage and causing material to stagnate in the discharge channel, which seriously affects the continuity of operations.

[0004] For the reasons mentioned above, we proposed a harvester grain bin that can automatically unload grain. Utility Model Content

[0005] The purpose of this invention is to provide a harvester grain bin that can automatically unload grain, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a harvester grain bin capable of automatic unloading, comprising a grain bin and a conveying mechanism. The grain bin is located at the rear of the harvester. A funnel cavity is provided inside the grain bin to collect grain. A screw feeder is provided at the lower part of the inner cavity of the funnel cavity. An inclined downward feeding channel is opened at the bottom of the funnel cavity, and the bottom of the feeding channel is connected to a conveying channel. The conveying channel is arranged horizontally, and a discharge port is provided at the right end of the conveying channel. An inclined downward discharge hopper is provided on the discharge port. A conveyor belt is horizontally installed at the upper part of the inner cavity of the conveying channel. The conveyor belt is evenly distributed with material-pushing claws. As the conveyor belt rotates, the material-pushing claws push the grain to the right, and the bottom of the material-pushing claws contacts the bottom inner wall of the conveying channel.

[0007] Preferably, the grain silo adopts an inclined top wall design, with a detachable dustproof cover plate added to the top, and sealing strips are set on the edge of the cover plate; the screw feeder is equipped with screw blades, which convey the grain in the funnel cavity downward by rotation; the bottom of the screw feeder is equipped with a belt pulley, and the belt pulley is connected to the transmission system of the harvester through a drive belt.

[0008] Preferably, the spiral blades of the spiral feeder adopt a variable diameter design; a support shaft is provided at the top of the spiral feeder, and the top of the support shaft is installed on the top plate of the grain silo; the conveyor belt extends to the right to the position of the discharge hopper; a wear-resistant rubber pad is provided at the bottom of the feeding claw; a transmission gear is provided at one end of the conveyor belt, and a conveyor motor is installed on the transmission gear, which can adjust the running speed of the conveyor belt independently.

[0009] Preferably, the funnel cavity is located at the bottom of the grain bin, with a taper of 55°-60°, and the inner wall of the funnel cavity is coated with a smooth polytetrafluoroethylene coating; an arc-shaped transition section is provided at the connection between the bottom of the funnel cavity and the discharge channel.

[0010] Preferably, the screw feeder can be equipped with a separate drive motor, and the transmission end of the drive motor is connected to the pulley of the screw feeder; an adjusting gate is installed in the discharge hopper, and the opening of the adjusting gate is controlled by the control system to control the discharge amount; a proximity sensor is installed on the outer wall of the discharge hopper to detect the position of the grain receiving car in real time.

[0011] Compared with existing technologies, the beneficial effects of this utility model are as follows: This solution can improve the smoothness of material feeding and prevent arching and blockage: The funnel cavity adopts an optimized tapered design of 55°-60°, combined with a smooth polytetrafluoroethylene coating on the inner wall, which significantly reduces the friction coefficient between the grain and the silo wall and accelerates the gravity feeding of grain; at the same time, the arc-shaped transition section between the bottom of the funnel cavity and the feeding channel reduces the resistance to grain flow, structurally preventing grain accumulation and arching. In addition, the screw feeder adopts a variable diameter blade design, with the upper small diameter blades guiding the grain to converge and the lower large diameter blades enhancing the pushing force. The matching of the upper and lower feeding rates further eliminates the problem of blockage, eliminating the need for manual intervention and ensuring continuous operation.

[0012] The conveyor belt features evenly distributed feeding claws with wear-resistant rubber pads at their bottom ends, ensuring a tight fit against the inner wall of the conveying channel. This prevents material residue during feeding and extends the service life of the feeding mechanism. Simultaneously, the conveyor belt is driven by an independent motor, allowing for individual speed adjustments based on grain type, humidity, and other operating conditions. This adapts to the conveying characteristics of different grains such as wheat, corn, and rice, improving conveying efficiency. Wear-resistant alloy strips welded to the edges of the spiral blades further enhance the durability of the feeding mechanism, extending the overall service life of the equipment. Attached Figure Description

[0013] Figure 1 This is the front view of the present utility model; Figure 2 This is a schematic diagram of the conveying mechanism of this utility model.

[0014] In the diagram: 1. Grain bin, 2. Conveying channel, 3. Funnel cavity, 4. Screw feeder, 5. Discharge channel, 6. Conveyor belt, 7. Feeding claw. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "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. Example 1

[0017] Please see Figure 1-2 The present invention provides the following technical solution: A combine harvester grain bin with automatic unloading capability includes a grain bin 1 and a conveying mechanism. The grain bin 1 is located at the rear of the combine harvester. A funnel cavity 3 is provided inside the grain bin 1 to collect grain. A screw feeder 4 is provided in the lower part of the inner cavity of the funnel cavity 3. An inclined downward feeding channel 5 is opened at the bottom of the funnel cavity 3. The bottom of the feeding channel 5 is connected to a conveying channel 2. The conveying channel 2 is arranged horizontally, and a discharge port is provided at the right end of the conveying channel 2. An inclined downward discharge hopper is provided on the discharge port. The screw feeder 4 is equipped with screw blades, which rotate to transport the grain in the funnel cavity 3 downward to the feeding channel 5; the bottom end of the screw feeder 4 is equipped with a belt pulley, and the belt pulley is connected to the transmission system of the harvester through a transmission belt; the top end of the screw feeder 4 is equipped with a support shaft, and the top of the support shaft is installed on the top plate of the grain bin 1. A conveyor belt 6 is horizontally arranged in the upper part of the inner cavity of the conveying channel 2. The conveyor belt 6 is evenly distributed with material-pulling claws 7. The material-pulling claws 7 push the grain to the right as the conveyor belt 6 rotates, and the bottom end of the material-pulling claws 7 contacts the bottom inner wall of the conveying channel 2, so that the material is pushed more cleanly. The bottom end of the material-pulling claws 7 is provided with a wear-resistant rubber pad. The conveyor belt 6 extends to the right to the discharge hopper. As the feeding claw 7 moves, it moves the grain to the discharge hopper for discharge. One end of the conveyor belt 6 is equipped with a transmission gear, and a conveyor motor is installed on the transmission gear, which can adjust the running speed of the conveyor belt 6 independently. Grain silo 1 adopts a sloping top wall design and is equipped with a removable dust cover. The edge of the cover is fitted with a sealing strip, which facilitates daily maintenance and prevents dust and rainwater from entering during operation. The funnel cavity 3 is located at the bottom of the grain bin 1. Its taper is designed to be 55°-60°. The inner wall of the funnel cavity 3 is coated with a smooth polytetrafluoroethylene coating to accelerate the falling of grain and prevent arching and blockage. An arc-shaped transition section is set at the connection between the bottom of the funnel cavity 3 and the feeding channel 5 to reduce the resistance to grain flow. The spiral blades of the spiral feeder 4 adopt a variable diameter design, with the upper blades having a slightly smaller diameter and the lower blades having a larger diameter. Wear-resistant alloy strips are welded to the edges of the blades to extend their service life. The screw feeder 4 can be equipped with a separate drive motor. The transmission end of the drive motor is connected to the pulley of the screw feeder 4. The dual-mode switching between main drive and independent drive is realized through the electromagnetic clutch. During normal operation, it is driven by the harvester transmission system. When unloading is blocked or in special working conditions, it automatically switches to the independent motor to improve reliability. An adjusting gate is installed inside the discharge hopper. The opening of the adjusting gate is controlled by the control system to control the amount of material discharged, so as to avoid overloading of the conveying channel. A proximity sensor is installed on the outer wall of the discharge hopper to detect the position of the grain receiving car in real time. When the grain receiving car is full, a shutdown signal is automatically triggered.

[0018] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It is obvious to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description. Therefore, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this utility model, and no reference numerals in the claims should be considered as limiting the scope of the claims.

[0019] Working principle: Grain collection and gathering: After harvesting, the grain enters the granary. The inclined top wall and the funnel cavity with a 55°-60° taper guide the grain to gather naturally to the bottom. The polytetrafluoroethylene coating on the inner wall and the arc transition section reduce flow resistance and prevent arching.

[0020] Feeding and conveying: The screw feeder is driven by the harvester's transmission system or an independent drive motor. The variable diameter screw blades rotate to push the grain in the hopper cavity downward to the feeding channel.

[0021] Grain from the feeding channel enters the transverse conveying channel. The conveyor belt drives the feeding claw to push the grain to the right. The wear-resistant rubber pad ensures that the grain is pushed cleanly and then pushed to the discharge hopper.

[0022] By adjusting the speed of the conveyor belt motor, controlling the opening of the discharge hopper gate, matching the receiving rhythm of the grain receiving car, and using proximity sensors to detect the full hopper status and trigger a shutdown, safe and controllable grain unloading can be achieved.

[0023] The auger feeder can switch between dual drive modes. Under normal working conditions, it uses the harvester's transmission system for energy saving, while switching to an independent motor to ensure operation when blocked. The conveyor belt is equipped with a separate motor, allowing for flexible adjustment of the transfer speed.

[0024] The tapered funnel cavity, smooth coating, and arc-shaped transition section work together to prevent grain blockage; wear-resistant alloy strips on the edges of the spiral blades and wear-resistant rubber pads on the feeding claws extend the service life of the components.

[0025] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A harvester grain bin capable of automatic unloading, comprising a grain bin (1) and a conveying mechanism, characterized in that: The grain bin (1) is located behind the harvester. The grain bin (1) has a funnel cavity (3) for collecting grain. The lower part of the inner cavity of the funnel cavity (3) is equipped with a screw feeder (4). The bottom of the funnel cavity (3) is provided with a downward inclined feeding channel (5). The bottom of the feeding channel (5) is connected to the conveying channel (2). The conveying channel (2) is arranged horizontally, and the right end of the conveying channel (2) is provided with a discharge port. The discharge port is provided with a downward inclined discharge hopper. A conveyor belt (6) is horizontally arranged on the upper part of the inner cavity of the conveying channel (2). The conveyor belt (6) is evenly distributed with material-pulling claws (7). The material-pulling claws (7) move the grain to the right as the conveyor belt (6) rotates, and the bottom end of the material-pulling claws (7) contacts the bottom inner wall of the conveying channel (2).

2. The combine harvester grain bin with automatic unloading capability according to claim 1, characterized in that: The grain silo (1) adopts an inclined top wall design and a detachable dustproof cover is added to the top. The edge of the cover is equipped with a sealing strip. The screw feeder (4) is equipped with a screw blade, which conveys the grain in the funnel cavity (3) downward by rotating. The bottom end of the screw feeder (4) is equipped with a belt pulley, and the belt pulley is connected to the transmission system of the harvester through a transmission belt.

3. The combine harvester grain bin with automatic unloading capability according to claim 1, characterized in that: The spiral blades of the spiral feeder (4) are designed with a variable diameter; a support shaft is provided at the top of the spiral feeder (4), and the top of the support shaft is installed on the top plate of the grain silo (1); the conveyor belt (6) extends to the right to the position of the discharge hopper; a wear-resistant rubber pad is provided at the bottom of the feeding claw (7); a transmission gear is provided at one end of the conveyor belt (6), and a conveyor motor is installed on the transmission gear, which can adjust the running speed of the conveyor belt (6) independently.

4. The combine harvester grain bin with automatic unloading capability according to claim 1, characterized in that: The funnel cavity (3) is located at the bottom of the grain bin (1), and its taper is designed to be 55°-60°. The inner wall of the funnel cavity (3) is coated with a smooth polytetrafluoroethylene coating. An arc-shaped transition section is provided at the connection between the bottom of the funnel cavity (3) and the feeding channel (5).

5. The combine harvester grain bin with automatic unloading capability according to claim 1, characterized in that: The screw feeder (4) can be equipped with a separate drive motor, and the transmission end of the drive motor is connected to the pulley of the screw feeder (4); an adjustment gate is set in the discharge hopper, and the discharge amount is controlled by the control system to control the opening of the adjustment gate; a proximity sensor is set on the outer wall of the discharge hopper to detect the position of the grain receiving car in real time.

Images