Conveying primary threshing roller and threshing device

Abstract

The utility model discloses a conveying primary threshing roller and a threshing device, and belongs to the technical field of gramineous crop threshing. The problem that in the threshing process of a threshing device in the prior art, crops are prone to being wound and stacked on a feeding threshing roller, and consequently a feeding port is blocked is solved. A threshing rib is arranged on the outer side wall of the roller body and comprises a connecting part and a feeding part, the connecting part is fixedly connected with the roller body, the feeding part is obliquely arranged relative to the connecting part, the inclination direction of the feeding part is opposite to the rotating direction of the roller body, and a feeding surface is formed on the surface, back to the roller body, of the feeding part. The conveying and primary threshing roller and the threshing device are used for auxiliary feeding and primary threshing of gramineous crops, the feeding part is obliquely arranged in the direction opposite to the rotating direction of the roller body, the situation that the crops are wound on the rake teeth and accumulated on the bent part to block the feeding port is avoided, the crops are smoothly pushed into the feeding port, auxiliary feeding is achieved, and the feeding effect is improved; crops are primarily threshed, and the threshing quality is improved.

Description

Technical Field

[0001] This utility model belongs to the technical field of threshing of gramineous crops, specifically relating to a conveying primary threshing roller and a threshing device. Background Technology

[0002] In agriculture, a threshing machine is a mechanical device that can separate the grains of crops from their stalks. It is mainly used for threshing gramineous crops such as wheat, rice, rapeseed, sorghum, highland barley, Job's tears, mung beans, and soybeans.

[0003] Typically, a threshing machine includes a shell and a threshing drum installed inside the shell's cavity. One end of the shell is the feed end, and the other end is the slag outlet. The threshing drum rotates around its own horizontal axis via a motor, feeding material from the feed end to the slag outlet. The upper part of the shell has a feed inlet at the feed end, one side has a slag outlet at the slag outlet, and the bottom has a discharge outlet. The feed inlet, slag outlet, and discharge outlet are all connected to the inner cavity of the shell. Crops are fed into the inner cavity through the feed inlet. The motor drives the threshing drum to rotate around its own horizontal axis, causing the grains to separate from the stems during the rotational conveying process. The stems are discharged from the slag outlet, and the grains are discharged from the discharge outlet.

[0004] Chinese patent document application number 202411228274.6 discloses a multi-stage threshing device, including a housing and a first fine threshing drum and a second fine threshing drum rotatably mounted in the housing. A feed hopper is installed at the feed inlet of the housing, and a feed coarse threshing drum is installed in the feed hopper. The feed coarse threshing drum includes two vertically arranged connecting discs, which are horizontally spaced apart and coaxially mounted via a first rotating shaft. The first rotating shaft is rotatably connected to the side wall of the feed hopper. The axial direction of the first rotating shaft is parallel to the rotation center of the first fine threshing drum. A plurality of feed rake teeth are installed between the two connecting discs. Each feed rake tooth includes a connecting rod parallel to the first rotating shaft and rake teeth disposed on the outer circumferential surface of the connecting rod. One end of the connecting rod is connected to one of the connecting discs, and the other end is connected to the other connecting disc. Multiple rake teeth are arranged in pairs, spaced apart along the axial direction of the connecting rod. During feeding, the rake teeth dig into the gramineous crops, pulling them into the feed inlet. The crops easily become entangled on the rake teeth, and subsequently accumulate on the feeding rake rod and the feeding coarse threshing roller, causing blockage at the feed inlet. This results in uneven or even impossible feeding of crops. The amount of crops dug into the feed inlet cannot be controlled; excessive digging leads to further blockage. Furthermore, the inclination direction of the feeding section is the same as the rotation direction of the primary threshing roller, and the end of the feeding section contacts the crops, digging them into the feed inlet. This can easily cause the crops to become lodged in the feed inlet. When crops break during harvesting, especially rice with high moisture content, the broken stems accumulate at the bend between the connecting part and the feeding part, causing blockage at the feed inlet and severely affecting the feeding efficiency of the threshing device. Frequent blockage at the feed inlet requires the user to stop the machine, remove the crop entangled on the rake teeth, and restart the threshing process, increasing the number of stops and downtime, and thus increasing the overall threshing time and efficiency. This is particularly severe for moist gramineous crops such as rice, where the crop becomes entangled on the rake teeth, significantly impacting both feeding and threshing efficiency. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a conveying primary threshing roller and a threshing device. The conveying primary threshing roller smoothly pushes the crops into the feed inlet, avoiding the crops from getting tangled in the rake teeth and accumulating, which would cause blockage of the feed inlet, and greatly improving the feeding effect and threshing efficiency.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] This utility model discloses a conveying roller for initial threshing, comprising a roller body, wherein a threshing rib is provided on the outer side wall of the roller body, the threshing rib comprising a connecting part and a feeding part fixedly connected, the connecting part being fixedly connected to the roller body, the feeding part being inclined relative to the connecting part, the inclination direction of the feeding part being opposite to the rotation direction of the roller body, and the side of the feeding part facing away from the roller body forming a feeding surface.

[0008] Furthermore, the shape of the roller body is cylindrical, elliptical, or rhomboid.

[0009] Furthermore, the threshing ribs extend from one end to the other along the axial direction of the roller body, and at least two threshing ribs are evenly arranged on the outer side wall of the roller body.

[0010] Furthermore, a plurality of the threshing ribs are evenly spaced along the circumference and axial direction of the roller body on the outer side wall of the roller body.

[0011] Furthermore, the roller body includes two oppositely arranged connecting discs, which are fixedly connected by a rotating shaft. At least two parallel fixing rods are arranged between the two connecting discs. The fixing rods are evenly distributed between the two connecting discs and are parallel to the axis of the rotating shaft. The threshing ribs are arranged on the outer side wall of the fixing rods facing away from the rotating shaft.

[0012] Furthermore, the threshing bar extends from one end to the other along the axial direction of the fixing rod.

[0013] Furthermore, the threshing ribs are evenly spaced along the axial direction of the fixing rod.

[0014] Furthermore, the feeding part includes a connecting end connected to the connecting part and a free end opposite to the connecting end, and the end face of the free end is provided with a serrated structure.

[0015] This utility model also discloses a threshing device, including a feeding hopper, a shell, and the aforementioned conveying primary threshing roller. The feeding hopper is located at the feed inlet of the shell and communicates with the feed inlet. The roller body is rotatably connected inside the feeding hopper near the feed inlet.

[0016] Furthermore, the housing includes a first fine threshing chamber, which is located on the other side of the feed inlet opposite to the feed hopper and communicates with the feed inlet. A first fine threshing roller is rotatably mounted in the first fine threshing chamber. The axis of the first fine threshing roller is parallel to that of the conveying primary threshing roller. A first screen is provided below the first fine threshing roller and is located below the feed inlet. An anti-backflow plate is provided on the side wall of the first fine threshing chamber that communicates with the feed inlet. The anti-backflow plate is located above the first screen, with its upper end above the feed inlet and its lower end extending towards the first screen beyond the upper edge of the feed inlet.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] This utility model provides a conveying primary threshing roller. The outer wall of the roller body is provided with threshing ribs. The feeding part of the threshing ribs is inclined (bent) in the opposite direction to the rotation direction of the roller body. The conveying primary threshing roller is installed in the feed hopper of the threshing device near the feed inlet. During the threshing of gramineous crops, the conveying primary threshing roller rotates to assist in the feeding of gramineous crops and to perform primary threshing of gramineous crops. Compared to traditional methods where the feeding section's inclination (bending) direction is the same as the roller's rotation direction, and the feeding section's end contacts the crop, digging the crop into the feed inlet, the feeding section's end can easily break the crop's stalks, especially rice with high moisture content. Broken stalks accumulate in the bend formed by the connecting part and the feeding section, causing blockage at the feed inlet. In this application, the feeding section's inclination (bending) direction is opposite to the roller's rotation direction. When the crop is fed, the feeding surface of the feeding section contacts the crop, pushing (pushing) it into the feed inlet and into the fine threshing chamber. This avoids the feeding section directly digging into the crop, prevents the crop from getting tangled in the threshing ribs and accumulating in the bend, avoids crop accumulation on the conveying primary threshing roller, and prevents blockage at the feed inlet, thus better assisting feeding and greatly improving the feeding effect. When crops are fed, the feeding surface contacts the crops, and a feeding space is formed between the feeding surface and the lower inner wall of the feeding hopper away from the inlet. A discharge space is formed between the feeding surface and the lower inner wall of the feeding hopper near the inlet. When crops are fed, they enter the feeding space, and the feeding part can more easily push the crops into the inlet. During the feeding process, the feeding space decreases and the discharge space increases. The feeding part squeezes and pushes the crops into the inlet and then into the fine threshing chamber, which helps to better assist the feeding and further improve the feeding effect. The feeding surface pushes (pushes) the crops into the inlet, and the crops enter the fine threshing chamber facing downwards. This avoids the crops from getting tangled and piled up on the threshing ribs under the action of centrifugal force and being thrown back into the inlet, causing blockage of the inlet. At the same time, it avoids the initial threshing of the crops from being thrown out and splashing, which could cause injury to the user. When crops are fed, the amount of crops entering the feeding space ensures a moderate and even feeding rate, preventing excessive crop accumulation that could clog the feed inlet. Even feeding improves the threshing quality of the threshing device, reduces overload on the device, minimizes maintenance, and extends its lifespan. The primary threshing rollers in this application effectively prevent crops from tangling and accumulating on them, reducing downtime and downtime for users to remove tangled crops, significantly decreasing overall threshing time and improving efficiency. The primary threshing rollers, together with the subsequent fine threshing rollers, form a multi-stage threshing mechanism. During threshing, the primary threshing rollers perform initial threshing, providing better conditions for subsequent fine threshing and improving overall threshing quality. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a front view of a cylindrical conveying primary threshing roller with threshing ribs extending integrally along the axial direction of the roller body, provided in an embodiment of this utility model.

[0021] Figure 2 yes Figure 1 Side view;

[0022] Figure 3 This is a side view of the conveying primary threshing roller with a triangular prism-shaped roller body provided in this embodiment of the utility model;

[0023] Figure 4 This is a perspective view of the conveying primary threshing roller with a quadrangular prism-shaped roller body provided in this embodiment of the utility model;

[0024] Figure 5 yes Figure 4 Enlarged view of part B in the middle;

[0025] Figure 6 This is a side view of the conveying primary threshing roller with a quadrangular prism-shaped roller body provided in this embodiment of the utility model;

[0026] Figure 7 This is a front view of the conveying primary threshing roller provided in this embodiment of the utility model, in which threshing ribs are spaced apart along the axial direction of the roller body;

[0027] Figure 8 This is a front view of a conveying primary threshing roller provided in this embodiment of the utility model, in which the threshing ribs, consisting of a connecting disc, a rotating shaft, and a fixing rod, extend integrally along the axial direction of the fixing rod.

[0028] Figure 9 yes Figure 8 Side view;

[0029] Figure 10 This is a front view of the conveying primary threshing rollers provided in this embodiment of the utility model, in which threshing ribs are spaced apart along the axial direction of the fixed rod;

[0030] Figure 11 This is a side view of the threshing device provided in an embodiment of the present invention;

[0031] Figure 12 This is a top view of the threshing device provided in this embodiment of the utility model;

[0032] Figure 13 yes Figure 12 Enlarged view of part A in the middle.

[0033] Figure label:

[0034] Roller body 1, threshing rib 2, connecting part 201, feeding surface 202, feeding part 203, sawtooth structure 3, connecting plate 4, rotating shaft 5, fixing rod 6, feeding hopper 7, anti-backflow plate 8, first fine threshing chamber 9, first fine threshing drum 10, shell 11, first screen 12, second fine threshing drum 13, slag outlet 14, second fine threshing chamber 15. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0036] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0037] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6As shown, this embodiment provides a conveying roller for initial threshing, including a roller body 1. Threshing ribs 2 are provided on the outer side wall of the roller body 1. Each threshing rib 2 includes a connecting part 201 and a feeding part 203 fixedly connected. The connecting part 201 is fixedly connected to the roller body 1. The feeding part 203 is inclined relative to the connecting part 201, and the inclination direction of the feeding part 203 is opposite to the rotation direction of the roller body 1. The side of the feeding part 203 facing away from the roller body 1 forms a feeding surface 202. The inclination angle of the feeding part 203 is, for example, 15°-30°. The threshing rib 2 is a threshing rod, threshing strip, or threshing plate. The threshing rib is welded to the outer side wall of the roller body 1 or integrally formed with the roller body 1. The outer surfaces of the roller body 1 and the threshing rib are coated with an anti-corrosion paint layer. Reinforcing ribs can be provided on the back of the feeding surface to prevent deformation. A support rod can be welded between the connecting part 201 and the feeding part 203. One end of the support rod is welded to the connecting part 201, and the other end is welded to the back of the feeding surface 202. Alternatively, the support rod can be welded between the roller body 1 and the feeding part 203, with one end welded to the roller body 1 and the other end welded to the back of the feeding surface 202. This provides support for the feeding part 203, maintains a constant inclination angle, and extends the service life of the initial threshing roller. A shaft or an entire shaft passes through the center of the left and right side walls of the roller body 1. A pulley is provided on the left side shaft. The pulley is connected to the pulley of a motor or engine via a belt. The motor or engine drives the roller body 1 to rotate.

[0038] Based on the aforementioned structure, a conveying primary threshing roller is provided with threshing ribs 2 on the outer side wall of the roller body 1. The feeding part 203 of the threshing ribs 2 is inclined (bent) in the opposite direction to the rotation direction of the roller body 1 relative to the connecting part 201. The conveying primary threshing roller is installed in the feed hopper 7 of the threshing device near the feed inlet. During the threshing process of gramineous crops, the conveying primary threshing roller rotates to assist in the feeding of gramineous crops and to perform primary threshing of gramineous crops. Compared to the previous design where the inclination (bending) direction of the feeding section 203 was the same as the rotation direction of the roller body, and the end of the feeding section 203 contacted the crops, digging the crops into the feed inlet, the end of the feeding section 203 could easily break the stalks of the crops, especially rice with high moisture content. The broken stalks would accumulate in the bend formed by the connecting section 201 and the feeding section 203, causing blockage of the feed inlet. In this application, the inclination (bending) direction of the feeding section 203 of the conveying primary threshing roller is opposite to the rotation direction of the roller body. When the crops are fed, the feeding surface 202 of the feeding section 203 contacts the crops, pushing (pushing) the crops into the feed inlet and then into the fine threshing chamber. This avoids the feeding section 203 digging directly into the crops, avoids the crops getting tangled on the threshing ribs 2 and accumulating in the bend, avoids the crops accumulating on the conveying primary threshing roller, avoids blockage of the feed inlet, better assists feeding, and greatly improves the feeding effect. When crops are fed, the feeding surface 202 contacts the crops. A feeding space is formed between the feeding surface 202 and the lower inner wall of the feeding hopper 7 away from the feeding port. A discharge space is formed between the feeding surface 202 and the lower inner wall of the feeding hopper 7 near the feeding port. When crops are fed, they enter the feeding space, and the feeding part 203 can more easily push the crops into the feeding port. During the feeding process, the feeding space decreases and the discharge space increases. The feeding part 203 squeezes and pushes the crops into the feeding port and then into the fine threshing chamber, which helps to better assist the feeding and further improve the feeding effect. The feeding surface 202 pushes (pushes) the crops into the feeding port. The crops enter the fine threshing chamber facing downwards, which avoids the crops from getting tangled and piled up on the threshing ribs 2 under the action of centrifugal force and being thrown back into the feeding port, causing blockage of the feeding port. At the same time, it avoids the initial threshing of the crops from being thrown out and splashing, causing damage to the user. When crops are fed, the crop enters the feeding space, ensuring a moderate amount is fed each time. This controls the feeding amount and ensures uniform feeding, preventing excessive crop from clogging the feed inlet. Uniform crop feeding improves the threshing quality of the crop, while reducing overload on the threshing device, minimizing maintenance, and extending its service life. The primary threshing rollers in this application effectively prevent crops from tangling and accumulating on them, reducing the time and frequency of downtime for users to remove tangled crops, significantly reducing overall threshing time and improving threshing efficiency.The conveying primary threshing rollers and the subsequent fine threshing rollers of the threshing device form a multi-stage threshing mechanism. During the threshing process, the conveying primary threshing rollers perform primary threshing on the crops, providing better threshing conditions for the subsequent fine threshing of the threshing device and improving the threshing quality of the threshing device.

[0039] Among them, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 As shown, the roller body 1 is cylindrical, elliptical, or rhomboid in shape.

[0040] The shape of the roller body 1 can be specifically set as a cylinder, elliptical cylinder, or rhomboid prism as needed. For example, if the roller body 1 is cylindrical, the cylindrical roller body 1 has better stability during rotation, more uniform feeding, and improved threshing quality. Among them, the rhomboid shape is such as a triangular prism (…). Figure 3 ), quadrangular prism ( Figure 4 The rollers can be shaped like pentaangular or hexagonal prisms, with the threshing ribs arranged along the prisms of the prisms. The size of the roller body 1 can be set according to the size of the threshing device. The roller body 1 can be solid or hollow. If the roller body 1 is large, it can be designed as a hollow structure; if the roller body 1 is small, it can be designed as a solid structure.

[0041] As one possible implementation method, such as Figure 1 , Figure 2 , Figure 4 As shown, the threshing ribs 2 extend from one end to the other along the axial direction of the roller body 1, and at least two threshing ribs 2 are evenly arranged on the outer side wall of the roller body 1.

[0042] The threshing rib 2 is a long strip-shaped integral structure that extends from one end to the other along the axial direction of the roller body 1. When crops are fed, the crops enter the feeding space and rotate along the roller body 1. The front end of the feeding space is sealed, and the feeding part 203 squeezes and pushes all the crops in the feeding space into the feeding port, further controlling the amount of feed, ensuring that the amount of crops fed is moderate, further ensuring that the crops are fed evenly, and further improving the threshing quality of crops in the threshing device. The integral threshing ribs 2 prevent crops from getting stuck in the gaps between the spaced rake teeth during the feeding process, thus avoiding entanglement and accumulation on the roller body 1 and causing blockage at the feed inlet. The integral threshing ribs 2 smoothly push the crops into the feed inlet of the threshing device, further improving the feeding effect of the threshing device. The threshing ribs 2 exert a consistent pushing force on the crops, pushing them evenly into the feed inlet, further preventing crops from getting entangled on the threshing ribs 2, and thus preventing them from entangled and accumulating on the roller body 1, avoiding blockage at the feed inlet. This better assists in the feeding of crops and further improves the feeding effect of the threshing device.

[0043] As one possible implementation method, such as Figure 7 As shown, a plurality of the threshing ribs 2 are evenly spaced along the circumference and axial direction of the roller body 1 on the outer side wall of the roller body 1.

[0044] Adjacent threshing ribs 2 are evenly spaced on the outer wall of the roller body 1. Multiple threshing ribs 2 can be arranged in multiple rows evenly distributed on the outer wall of the roller body 1, such as seven threshing ribs forming a row, or four rows of threshing ribs 2 evenly distributed along the circumference of the roller body 1 on the outer wall of the roller body 1. Adjacent rows of threshing ribs 2 can be aligned or staggered. The spaced threshing ribs 2 improve the initial threshing effect.

[0045] As one possible implementation method, such as Figure 8 , Figure 9 , Figure 10 As shown, the roller body 1 includes two oppositely arranged connecting discs 4, which are fixedly connected by a rotating shaft 5. At least two parallel fixing rods 6 are arranged between the two connecting discs 4. The fixing rods 6 are evenly arranged between the two connecting discs 4 and are parallel to the axis of the rotating shaft 5. The threshing ribs 2 are arranged on the outer side wall of the fixing rods 6 facing away from the rotating shaft 5.

[0046] The connecting disc 4, the fixing rod 6, and the rotating shaft 5 form an open roller body 1. The fixing rods 6 have a feeding space between them, which facilitates feeding, reduces the weight of the roller body 1, and makes it suitable for larger threshing devices. The fixing rod 6 can be a cylindrical tube, a square tube, or angle steel, etc. An additional connecting disc 4 is provided between the two connecting discs 4, and the three connecting discs 4 are evenly distributed along the rotating shaft 5 to provide better support for the fixing rods 6. The two ends of the rotating shaft 5 are rotatably connected to the two side walls of the feed hopper 7 of the threshing device.

[0047] Among them, such as Figure 8 , Figure 9 As shown, the threshing bar 2 extends from one end to the other along the axial direction of the fixing rod 6.

[0048] The threshing rib 2 is a long strip-shaped integral structure that extends from one end to the other along the axial direction of the roller body 1, which is beneficial for further assisting feeding.

[0049] Among them, such as Figure 10 As shown, the threshing ribs 2 are evenly spaced along the axial direction of the fixing rod 6.

[0050] The evenly spaced threshing ribs 2 improve the initial threshing effect.

[0051] As one possible implementation method, such as Figure 1 , Figure 4 , Figure 5 , Figure 8, Figure 13 As shown, the feeding part 203 includes a connecting end connected to the connecting part 201 and a free end opposite to the connecting end, and the end face of the free end is provided with a serrated structure 3.

[0052] The serrated structure 3 provides gripping force to the crops, facilitating their feeding into the inlet, while also improving the quality of coarse threshing. Furthermore, the rounded tips of the serrated structure 3 reduce crop breakage. The free end is the other end opposite the connecting end.

[0053] threshing equipment, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 , Figure 11 , Figure 12 , Figure 13 As shown, it includes a feed hopper 7, a housing 11, and the aforementioned conveying and initial threshing roller. The feed hopper 7 is located at the feed inlet of the housing 11 and communicates with the feed inlet. The roller body 1 is rotatably connected inside the feed hopper 7 near the feed inlet.

[0054] The threshing device of this application is equipped with a primary threshing roller in the feed hopper 7. This prevents crops from tangling and accumulating on the primary threshing roller, avoiding blockage at the feed inlet and better assisting in crop feeding, thus improving the feeding effect of the threshing device. It also reduces the time and number of downtimes required for users to remove tangled and accumulated crops from the primary threshing roller, reducing the overall threshing time and improving threshing efficiency. Simultaneously, the primary threshing roller and the subsequent fine threshing roller form a multi-stage threshing mechanism. During the threshing process, the primary threshing roller performs primary threshing on the crops, providing better threshing conditions for the subsequent fine threshing and improving the threshing quality of the threshing device.

[0055] As one possible implementation method, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 , Figure 11 , Figure 12 , Figure 13As shown, the housing 11 includes a first threshing chamber 9, which is located on the other side of the feed inlet opposite to the feed hopper 7 and communicates with the feed inlet. A first threshing drum 10 is rotatably mounted in the first threshing chamber 9. The axis of the first threshing drum 10 is parallel to that of the roller body 1. A first screen 12 is provided below the first threshing drum 10. The first screen 12 is located below the feed inlet. An anti-backflow plate 8 is provided on the side wall of the first threshing chamber 9 that communicates with the feed inlet. The anti-backflow plate 8 is located above the first screen 12. The upper end of the anti-backflow plate 8 is located above the feed inlet, and the lower end of the anti-backflow plate 8 extends outward from the upper edge of the feed inlet toward the first screen 12.

[0056] The anti-backflow plate 8 is designed to prevent crop and grain particles from being thrown back into the feed inlet and splashing out of the feed hopper 7 under the centrifugal force of the first threshing drum 10 during the threshing process. The anti-backflow plate 8 blocks these particles, preventing them from splashing back into the feed inlet and potentially injuring the user, thus reducing particle loss. The collision between the crop and the anti-backflow plate 8 facilitates threshing. Furthermore, the anti-backflow plate 8 eliminates the need for a plastic curtain outside the feed inlet, which would obstruct feeding, thus improving feeding efficiency. The length of the anti-backflow plate 8 is not less than the length of the feed inlet. The left and right ends of the anti-backflow plate 8 are aligned with the left and right ends of the feed inlet, or the left and right ends of the anti-backflow plate 8 extend beyond the left and right ends of the feed inlet, respectively. The lower end of the anti-backflow plate 8 extends vertically or inclined downwards towards the first screen 12 and extends beyond the upper edge of the feed inlet. The anti-backflow plate 8 completely or partially covers the feed inlet. There is a gap between the lower end of the anti-backflow plate 8 and the first screen 12 for feeding. The lower end of the anti-backflow plate 8 extends vertically downwards towards the first screen 12. The anti-backflow plate 8 is opposite to the feed inlet. When the lower end of the anti-backflow plate 8 extends inclined downwards towards the first screen 12, it must not interfere with the rotation of the first threshing drum 10, i.e., it must not hinder the rotation of the first threshing drum 10. The first threshing drum 10 and the roller body 1 are connected by a belt to the pulley on one side of the shaft where the pulley is located. The shell 11 includes a second threshing chamber 15, which communicates with the first threshing chamber 9. The second threshing chamber 15 is equipped with a second threshing roller 13, whose axes are parallel to those of the first threshing roller 10. A second screen is positioned below the second threshing roller 13. The pulley of the second threshing roller 13 is connected to the pulley of the first threshing roller 10 via a belt, thus enabling multi-stage threshing of crops by the primary threshing roller, the first threshing roller 10, and the second threshing roller 13, thereby improving threshing quality. Grains fall from the first screen 12 and the second screen into the bottom of the shell 11 and are then discharged and collected from the outlet at the bottom of the shell 11. Stem residue is discharged from the slag outlet 14.

[0057] The above description is only a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model.

Claims

1. A conveying roller for initial threshing, characterized in that, The roller body (1) is provided with threshing ribs on its outer side wall. The threshing ribs (2) include a connecting part (201) and a feeding part (203) that are fixedly connected. The connecting part (201) is fixedly connected to the roller body (1). The feeding part (203) is inclined relative to the connecting part (201). The inclination direction of the feeding part (203) is opposite to the rotation direction of the roller body (1). The side of the feeding part (203) facing away from the roller body (1) forms a feeding surface (202).

2. The conveying roller for initial threshing according to claim 1, characterized in that, The shape of the roller body (1) is cylindrical, elliptical, or rhomboid.

3. The conveying roller for initial threshing according to claim 2, characterized in that, The threshing ribs (2) extend from one end to the other along the axial direction of the roller body (1), and at least two threshing ribs (2) are evenly arranged on the outer side wall of the roller body (1).

4. The conveying roller for initial threshing according to claim 2, characterized in that, Multiple threshing ribs (2) are evenly spaced along the circumference and axial direction of the roller body (1) on the outer side wall of the roller body (1).

5. The conveying roller for initial threshing according to claim 1, characterized in that, The roller body (1) includes two oppositely arranged connecting discs (4), which are fixedly connected by a rotating shaft (5). At least two parallel fixing rods (6) are arranged between the two connecting discs (4). The fixing rods (6) are evenly arranged between the two connecting discs (4). The fixing rods (6) are parallel to the axis of the rotating shaft (5). The threshing ribs (2) are arranged on the outer side wall of the fixing rods (6) facing away from the rotating shaft (5).

6. The conveying roller for initial threshing according to claim 5, characterized in that, The threshing bar (2) extends from one end to the other along the axial direction of the fixing rod (6).

7. The conveying roller for initial threshing according to claim 5, characterized in that, The threshing ribs (2) are evenly spaced along the axial direction of the fixing rod (6).

8. The conveying roller for initial threshing according to claim 1, characterized in that, The feeding part (203) includes a connecting end connected to the connecting part (201) and a free end opposite to the connecting end, and the end face of the free end is provided with a serrated structure (3).

9. A threshing device, characterized in that, It includes a feed hopper (7), a housing (11), and a conveying primary threshing roller as described in any one of claims 1-8. The feed hopper (7) is disposed at the feed inlet of the housing (11) and communicates with the feed inlet. The roller body (1) is rotatably connected inside the feed hopper (7) near the feed inlet.

10. The threshing device according to claim 9, characterized in that, The housing (11) includes a first threshing chamber (9), which is located on the other side of the feed inlet opposite to the feed hopper (7) and communicates with the feed inlet. A first threshing drum (10) is rotatably mounted on the first threshing chamber (9). The axis of the first threshing drum (10) is parallel to that of the roller body (1). A first screen (12) is provided below the first threshing drum (10). The first screen (12) is located below the feed inlet. An anti-backflow plate (8) is provided on the side wall of the first threshing chamber (9) that communicates with the feed inlet. The anti-backflow plate (8) is located above the first screen (12). The upper end of the anti-backflow plate (8) is located above the feed inlet, and the lower end of the anti-backflow plate (8) extends out of the upper edge of the feed inlet toward the first screen (12).

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