Straw throwing machine

Abstract

The utility model discloses a straw throwing machine which comprises a throwing disc and a power mechanism driving the throwing disc to move, the throwing disc is located below the power mechanism, and a baffle is further arranged behind the throwing disc. The device further comprises blocking plates located on the two sides of the throwing disc. According to the straw throwing device, straw can be evenly thrown, the situation that the straw is stacked in pieces is avoided, the throwing range can be controlled within a certain area, the phenomenon that the straw is thrown to crops which are not harvested is avoided, and the harvesting efficiency of the crops can be improved.

Description

Technical Field

[0001] This utility model relates to a straw spreader, specifically a straw spreader that spreads straw evenly. Background Technology

[0002] After crops such as corn, millet, and sorghum mature, they need to be harvested using combine harvesters. The remaining straw after harvesting contains rich organic matter and nutrients, such as cellulose, hemicellulose, lignin, protein, and ash elements. These substances, after decomposition in the soil, can increase the soil's organic matter content, prevent soil fertility decline, and ensure a relatively balanced supply of nutrients needed for crop growth. Therefore, after harvesting, straw is usually chopped using a straw-returning machine, and a spreader is attached to the back of the machine for diverting and spreading the straw. However, currently, the straw is chopped and directly spread onto the ground by the straw-returning machine, resulting in uneven spreading and large-scale accumulation that causes many inconveniences for subsequent work; or, when spreading directly, the straw is too scattered, potentially spilling onto unharvested crops, affecting harvesting efficiency, and creating potential safety hazards, among other problems.

[0003] Therefore, Chinese patent document CN204907164U discloses a grain harvester and its straw spreading device, including a feeding disc, a straw-discharging flywheel, and a flywheel coupling. The feeding disc has a central shaft hole, and the flywheel coupling is rotatably connected to the shaft hole. The straw-discharging flywheel is fixed to the upper end of the flywheel coupling, and a semi-circular baffle is provided on the outer side of the flywheel. The lower end of the flywheel coupling is poweredly connected to a drive mechanism. This invention rapidly and evenly spreads the crushed straw, preventing it from piling up and fully covering the rear and sides of the harvester's path, eliminating the need for secondary operations and ensuring comprehensive straw return to the field.

[0004] In the aforementioned existing patents, after a baffle plate is installed above the straw spreading device, the straw, after being crushed by the crusher and thrown out, is blocked by the baffle plate installed at the rear, bounces back and falls into the feeding tray. The straw discharge flywheel rotates at high speed through the drive mechanism, scraping off the falling straw and quickly throwing it out. Under the action of centrifugal force, it is evenly scattered backward in a fan shape. Although this method can prevent the straw from concentrating at the rear, the problem of uneven spreading still exists. Utility Model Content

[0005] To address the technical problem of uneven spreading in existing straw spreading techniques, this utility model provides a straw spreader, including a spreading disc and a power mechanism for driving the spreading disc. The spreading disc is located below the power mechanism, and a baffle is provided behind the spreading disc. Furthermore, it also includes blocking plates located on both sides of the spreading disc.

[0006] In existing technologies, while installing a baffle at the rear can prevent straw from concentrating behind the machine, the straw still fans out when the spreading disc is spreading it, causing some straw to fly to the sides as well. Even the portion of straw blocked by the rear baffle also flies to the sides, resulting in uneven spreading. In this solution, in addition to the rear baffle, blocking plates are installed on both sides of the spreading disc. These two baffles create a spreading zone, ensuring that the straw spread from the spreading disc only falls within this zone. This allows for even spreading of the straw, preventing it from piling up and spilling onto unharvested crops, thus improving harvesting efficiency.

[0007] Preferably, the baffle plate is a rubber plate. Since the straw has a certain speed when it is thrown out by the spreading disc, it is easy for it to bounce back when it is blocked by the baffle plate. In this solution, by using an elastic rubber plate as the baffle plate, the rebound of the straw can be reduced, and the uniform spreading of the straw can be further guaranteed.

[0008] Preferably, the power mechanism has a housing, and the baffle is detachably connected to the housing. The housing in this design prevents scattered straw from entering the power mechanism, ensuring its normal operation.

[0009] Preferably, the power mechanism includes a pulley, a drive shaft driven by the pulley, and a drive assembly mounted on the drive shaft, the drive assembly being connected to the spraying disc; the drive shaft and the drive assembly are located within the housing. This design utilizes the cooperation of the pulley, drive shaft, and drive assembly to drive the spraying disc, resulting in a simple structure.

[0010] Preferably, the drive assembly includes meshing bevel gears, one bevel gear being connected to the drive shaft, and the other bevel gear being connected to the spraying disc via a transmission shaft. This design uses bevel gears to achieve smooth power transmission, reducing power loss and operating noise during the sprayer's operation.

[0011] Preferably, the end of the drive shaft connected to the bevel gear is provided with an outer casing. In this design, the outer casing prevents scattered straw from affecting the rotation of the drive shaft, and the structure is simple.

[0012] Preferably, a bearing is installed between the drive shaft and the outer cylinder shell. In this design, the bearing ensures both the normal rotation of the drive shaft and the sealing effect of the outer cylinder shell on the drive shaft, preventing scattered straw from entering the outer cylinder shell.

[0013] Preferably, the drive shaft is a hexagonal shaft. The choice of a hexagonal shaft in this design can better transmit power and withstand greater torque, ensuring the normal spreading of straw.

[0014] This utility model has the following beneficial effects:

[0015] 1. This utility model can evenly spread straw, avoid straw piling up in patches, and control the spreading range within a certain area, preventing straw from being scattered onto unharvested crops, thereby improving the harvesting efficiency of crops.

[0016] 2. This utility model has high spraying efficiency;

[0017] 3. This utility model has a simple structure, is easy to assemble, and can also prevent the spilled straw from affecting the power mechanism, resulting in a long service life. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of an embodiment of the straw spreading machine of this utility model;

[0019] Figure 2 for Figure 1 A partial sectional view. Detailed Implementation

[0020] The following detailed description illustrates the specific implementation method:

[0021] 1. Definition

[0022] Straw: The general term for the stems and leaves (ears) of mature crops.

[0023] Hexagonal shaft: A type of shaft part with six faces, also known as a hexagonal shaft.

[0024] 2. The reference numerals in the accompanying drawings of the instruction manual include: outer shell 1, pulley 2, spraying disc 3, outer cylinder shell 4, baffle 5, blocking plate 6, drive shaft 7, transmission shaft 8, bevel gear 9.

[0025] The basic implementation examples are as follows: Figure 1 and Figure 2 As shown: A straw spreader includes a spreading disc 3 and a power mechanism for driving the spreading disc 3. The spreading disc 3 is located below the power mechanism, and a baffle 5 is provided behind the spreading disc 3. It also includes baffle plates 6 located on both sides of the spreading disc 3. The baffle plates 6 are made of rubber and are installed on both sides of the outer casing 1. The power mechanism is equipped with the outer casing 1, and the baffle plates 5 are detachably connected to the outer casing 1.

[0026] Specifically, the power mechanism includes a pulley 2, a drive shaft 7 driven by the pulley 2, and a drive assembly mounted on the drive shaft 7. The drive assembly is connected to the spraying disc 3. The drive shaft 7 and the drive assembly are located within the outer casing 1. The drive shaft 7 is a hexagonal shaft. The drive assembly includes meshing bevel gears 9, one of which is connected to the drive shaft 7, and the other bevel gear 9 is connected to the spraying disc 3 via a transmission shaft 8. One end of the transmission shaft 8 extends into the outer casing 1 and connects to the corresponding bevel gear 9. A bearing is installed between the transmission shaft 8 and the outer casing 4.

[0027] like Figure 1 As shown, the three bearing kits are installed onto the housing 1 using nine M10×25 semi-circular head and neck bolts and nine M10 flange nuts. The drive shaft 7 is then installed inside the housing 1 through the bearing kits. Simultaneously, the bevel gear 9, spacer, locking sleeve, and pulley 2 are sequentially installed onto the drive shaft 7. Finally, the retaining ring and hexagonal flange bolts M10×25 are installed together.

[0028] Install the two bearing assemblies onto the outer casing 1 using eight M10×20 hexagonal flange bolts and eight M10 flange nuts. Then, pass the two drive shafts 8 through the bearing assemblies and install them onto the outer casing 1. Simultaneously, install the two bevel gears 9 onto the upper end of the drive shafts 8, allowing them to mesh with the corresponding bevel gears 9 on the drive shaft 7. Next, install the two bearings onto the drive shafts 8 and then onto the outer casing 4 using M10×25 semi-circular head square neck bolts, M10 flat washers, M10 spring washers, and M10 hexagonal nuts. Finally, install the two spray discs 3 together using four M8×80 hexagonal head bolts, flat washers, and M8 non-metallic insert lock nuts.

[0029] The specific implementation process is as follows: During use, pulley 2 is connected to the power source via a belt. After the power source is started, pulley 2 rotates, driving drive shaft 7 to rotate. Drive shaft 7 drives transmission shaft 8 to rotate through meshing bevel gear 9. As a result, spreading disc 3 rotates, spreading the chopped straw out. The rear baffle 5 and the side baffles 6 form a spreading zone, and the straw spread by spreading disc 3 can only be evenly spread in this spreading zone.

[0030] The above descriptions are merely embodiments of this utility model. Commonly known structures and characteristics are not described in detail here. Those skilled in the art are aware of all common technical knowledge in the field prior to the application date or priority date, are knowledgeable of all existing technologies in that field, and possess the ability to apply conventional experimental methods prior to that date. Therefore, those skilled in the art can, based on the guidance provided in this application, improve and implement this solution in conjunction with their own capabilities. Typical known structures or methods should not be obstacles for those skilled in the art to implement this application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A straw spreader, comprising a spreading disc and a power mechanism for driving the spreading disc, wherein the spreading disc is located below the power mechanism, and a baffle is provided behind the spreading disc; characterized in that: It also includes baffles located on both sides of the spraying disc.

2. The straw spreader according to claim 1, characterized in that: The baffle plate is a rubber sheet.

3. The straw spreader according to claim 1 or 2, characterized in that: The power mechanism has a housing, and the baffle is detachably connected to the housing.

4. The straw spreader according to claim 3, characterized in that: The power mechanism includes a pulley, a drive shaft driven by the pulley, and a drive assembly mounted on the drive shaft. The drive assembly is connected to the spraying disc. The drive shaft and the drive assembly are located within the housing.

5. The straw spreader according to claim 4, characterized in that: The drive assembly includes meshing bevel gears, one of which is connected to the drive shaft, and the other bevel gear is connected to the spraying disc via a transmission shaft.

6. The straw spreader according to claim 5, characterized in that: The drive shaft is connected to the bevel gear at one end and has an outer casing.

7. The straw spreader according to claim 6, characterized in that: A bearing is installed between the drive shaft and the outer cylinder shell.

8. The straw spreader according to claim 7, characterized in that: The drive shaft is a hexagonal shaft.

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