Combine harvester for grain harvesting

Abstract

The combine harvester mainly comprises a header assembly, a threshing and conveying device, a winnowing bin device, a granary, a cab, a walking crawler belt set, a straw stacking table and a straw picking device, a rice ear cutting set device is placed in the header assembly, one side of the rice ear cutting set device is connected with the threshing and conveying device, and the other side of the rice ear cutting set device is connected with the granary. A threshing conveying roller mechanism is placed in the threshing conveying device, one end of the threshing conveying roller mechanism is connected with a winnowing bin device, the threshing conveying device penetrates through one side face of the winnowing bin device to reach the interior of the winnowing bin device, and a granary is fixedly installed at the upper end of the winnowing bin device. The method has the effects of reducing the damage to the field, reducing the death of the crayfish caused by rolling, increasing the survival rate of the crayfish and improving the effect of protecting the crayfish larvae.

Description

Technical Field

[0001] The present invention relates to the technical field of harvesters, and specifically to a combine harvester for grain harvesting. Background Art

[0002] A grain harvester, also known as a combine harvester, is a harvesting machine that can complete processes such as harvesting, threshing, separating stalks, and removing impurities of cereal crops at one time, and directly obtain grains from the field.

[0003] In addition, shrimp and rice co-culture belongs to a farming mode that combines planting and breeding, that is, crayfish are cultured in paddy fields and a single-season middle rice is planted. During the rice planting period, crayfish and rice grow together in the paddy field. Usually, rice harvesting is around October every year. At the same time, the peak spawning period of crayfish farming is from September to October. When harvesting rice, the paddy field needs to be drained. After drainage, the crayfish will directly dig holes and burrow into the paddy field soil, and then a harvester is used to harvest the rice. During the harvesting process, the self-weight of the harvester will cause damage to the field through the crawlers, and there is a problem that the crayfish in the holes are crushed to death.

[0004] After the rice is harvested, water needs to be injected into the paddy field to prompt the crayfish to come out of the holes for spawning. Too much straw left in the paddy field will cause the straw to decompose during the soaking process, releasing various organic and inorganic substances. These substances may change the chemical properties of the water, leading to water quality deterioration. It is necessary to recycle the straw discharged in the paddy field. Usually, a straw picker needs to enter the field again to collect the straw, resulting in secondary damage to the field and increasing the mortality rate of crayfish. Summary of the Invention

[0005] The present application provides a combine harvester for grain harvesting, which has the advantages of reducing damage to the field, reducing the death of crayfish caused by being crushed, increasing the survival rate of crayfish, improving the protection of crayfish fry, more complete threshing of rice ears, and more threshing amount, so as to solve the problems of integrated harvesting and picking, the pressure of the self-weight of the harvester on the ground causing damage to the ground, resulting in the destruction of the living space of crayfish, and the crayfish being crushed to death by the harvester.

[0006] To achieve the above object, the present application adopts the following technical solution: A combine harvester for harvesting grains, comprising: a header assembly, inside which a rice ear cutting group device is placed. One side of the rice ear cutting group device is connected to a threshing and conveying device, inside which a threshing and conveying roller mechanism is placed. The threshing and conveying device is internally communicated with a winnowing bin device. A grain bin is fixedly installed at the upper end of the winnowing bin device. A cab is placed on one side of the winnowing bin device and the grain bin. The lower end of the winnowing bin device is connected to a walking track group. One end of the winnowing bin device away from the threshing and conveying device is connected to a straw stacking platform. A rotating motor is fixedly installed on the lower end surface of the straw stacking platform. A straw picking device is installed on one end surface of the straw stacking platform away from the winnowing bin device.

[0007] Further, the header assembly includes a divider, a reel, a support group, a cutter, and a rice ear cutting group device. The divider and the cutter are respectively installed on one side of the support group. The reel is placed at the upper end of the divider. A primary conveying group is placed above the support group. A secondary conveyor belt is placed on one side of the primary conveying group away from the divider. The primary conveying group and the secondary conveyor belt are provided in two groups, and the two groups of primary conveying groups and secondary conveyor belts are horizontally mirror - installed. The rice ear cutting group device is placed on one side of the two secondary conveyor belts away from the primary conveying group.

[0008] Further, the rice ear cutting group device includes a cutting table, a tertiary conveying chain, a tertiary conveying motor, and rice ear cutters. Transmission wheels are placed inside the tertiary conveying chain. A tertiary conveying motor is fixedly installed at the center on one side of the transmission wheel of the tertiary conveying chain. The tertiary conveying chain and the tertiary conveying motor are divided into upper and lower groups. The cutting table is placed at the upper end of the lower tertiary conveying chain. The rice ear cutters are fixedly installed on the side of the transmission wheel of the upper - group tertiary conveying chain away from the tertiary conveying motor. A spike - pressing frame is fixedly installed on the side of the cutting table close to the rice ear cutters. A spring is fixedly installed at one side of the lower end of the cutting table. The lower end of the spring is fixedly installed on a sliding table. One end of the sliding table away from the cutting table is connected and installed with a threshing and conveying device.

[0009] Further, the threshing and conveying device includes a screening upper cover part, a feed pipe, a screening pipe, a spiral assembly, a screening pipe support, and a threshing and conveying roller mechanism. One end of the sliding table away from the cutting table is connected to a feed pipe. There is an opening on one side of the feed pipe. The threshing and conveying roller mechanism is placed at the opening position of the feed pipe. One side end of the feed pipe away from the opening position is set as an open surface. The upper half peripheral wall of the open surface of the feed pipe is fixedly installed with a screening upper cover part. The lower half peripheral wall of the open surface of the feed pipe is fixedly installed with a screening pipe. The spiral assembly is fixedly installed on the inner peripheral walls of the screening upper cover part and the screening pipe. On both sides of one end of the screening upper cover part away from the feed pipe, screening pipe supports are fixedly installed. One end of the screening pipe support away from the screening upper cover part is fixedly installed on the winnowing bin device. A grain conveying pipe is sleeved on the outer peripheral surface of the screening upper cover part. A grain conveying spiral blade is fixedly installed on the inner peripheral surface of the grain conveying pipe. One end of the grain conveying pipe close to the sliding table is sleeved with a grain conveying drive belt. One end of the grain conveying drive belt is sleeved with a drive rod. One end of the drive rod away from the grain conveying drive belt is belt-sleeved with a threshing and conveying motor.

[0010] Further, the threshing and conveying roller mechanism includes a primary feed round roller, a feed spiral blade, a secondary threshing roller, a striking part, and a tertiary mixing roller. One end of the primary feed round roller is fixedly installed with a secondary threshing roller. One end of the primary feed round roller away from the secondary threshing roller is sleeved with a threshing drive belt. One end of the threshing drive belt away from the primary feed round roller is sleeved on the drive rod. One end of the secondary threshing roller is fixedly installed with a tertiary mixing roller. One end of the tertiary mixing roller away from the secondary threshing roller is fixedly installed with a quaternary threshing roller. The feed spiral blade is fixedly installed on the outer peripheral surface of the primary feed round roller. The striking part is fixedly installed on the outer peripheral surface of the secondary threshing roller. The mixing spiral blade is fixedly installed on the outer peripheral surface of the tertiary mixing roller. The U-shaped threshing part is fixedly installed on the outer peripheral surface of the quaternary threshing roller.

[0011] Further, the spiral directions of the feed spiral blade, the striking part, the mixing spiral blade, and the U-shaped threshing part are all the same direction, and the latter successively takes the end position of the former as the starting point. The shape of the tertiary mixing roller is set with larger diameters at both ends and a smaller diameter at the middle position.

[0012] Further, the winnowing bin device includes a winnowing box, a trapezoidal discharge port, a discharge pipeline, a blower, and a vibrating screen. A circular through hole is provided at a position of the winnowing box close to the threshing and conveying device. The circular through hole of the winnowing box allows the grain conveying pipe to pass through. The lower end of the winnowing box is a baffle inclined towards the threshing and conveying device. One end of the winnowing box away from the threshing and conveying device is fixedly installed with a trapezoidal discharge port. One end of the trapezoidal discharge port away from the winnowing box is fixedly installed with a discharge pipeline. A blower is placed inside the winnowing box. The air outlet of the blower faces the vibrating screen. A finished product conveying auger is placed at one side end of the winnowing box away from the trapezoidal discharge port. A lifting auger is installed at a position on one side of the finished product conveying auger away from the cab. The upper end of the lifting auger is installed with a granary on one side.

[0013] Further, the straw pickup device includes a rotating assembly, a straw scraping member, a straw clamping motor, a straw clamping member, and a rack. A rotating assembly is installed on one end face of the straw stacking table. A transition plate is placed on the upper end of the rotating assembly. A straw scraping member is fixedly connected to the end face of the rotating assembly away from the straw stacking table. The straw scraping members are arranged in groups of two and there are two groups in total. The shape of the straw scraping member is set as a semi-circle. A straw clamping motor is fixedly installed on the outer peripheral surface of the semi-circle of the straw scraping member. A straw clamping member is clamped at the center position between every two straw scraping members. A circular circumferential long groove is provided inside the straw clamping member. A rack is fixedly installed in the circular circumferential long groove of the straw clamping member. A gear bar is meshed and installed on the surface of the rack. Gear racks are respectively sleeved on the two top ends of the gear bar.

[0014] Further, the shape of the straw clamping member is set as a major arc. One end of the straw clamping member is set as a pointed head. The direction away from the pointed head of the straw clamping member is set as a wide head. A sawtooth group is provided on the inner circumference of the straw clamping member. The sawteeth of the straw clamping member are arranged along the inclined direction of the pointed head of the straw clamping member.

[0015] The present invention has the following beneficial effects:

[0016] 1. For a combine harvester for grain harvesting provided in this application, the cut straw is conveyed to the end of the cutting table away from the secondary conveyor belt and discharged into the field. The position where the straw is discharged is at the front end of the advancing direction of the walking track group, so that the surface of the walking track group presses on the straw, reducing the pressure of the self-weight of the harvester on the ground and the extrusion force of the walking track group on the ground causing damage to the field surface. The straw plays a buffering role, realizing the reduction of damage to the field, reducing the death of crayfish caused by being crushed, and improving the survival rate of crayfish.

[0017] 2. For a combine harvester for grain harvesting provided in this application, the rotating hitting members on the secondary threshing roller hit the rice ears for threshing. The hitting members are used for the first threshing of the rice ears. The mixing spiral blades on the tertiary mixing roller mix the rice ears after the first hitting, turning the inner-layer rice ears attached to the secondary threshing roller to the outer layer. The mixing spiral blades push the mixed rice ears to the U-shaped threshing members on the quaternary threshing roller. The U-shaped threshing members perform a second threshing on the mixed rice ears, avoiding the problem that the inner-layer rice ears have been in the inner layer and received less hitting and are insufficiently threshed. It realizes the mixing of the inner-layer rice ears through the tertiary mixing roller and the mixing spiral blades, enabling the second threshing by the U-shaped threshing members, making the threshing of the rice ears more complete and the threshing amount of the rice ears more.

[0018] 3. The combine harvester for grain harvesting provided by this application collects the straw in the fields through the straw scraping parts and straw clamping parts, and transfers and stores it at the upper end of the straw stacking platform, avoiding excessive straw accumulation in the fields, which may affect the emergence of crayfish from the soil. At the same time, it avoids the humus of excessive straw in the fields from affecting the living environment of crayfish, and causing fires and environmental pollution caused by straw burning, and the death of crayfish fry due to fires, achieving the effects of protecting the environment, improving the protection of crayfish fry, and integrating harvesting and gathering. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings forming a part of the specification depict the embodiments disclosed in this application and, together with the specification, are used to explain the principles disclosed in this application.

[0020] Referring to the drawings, the present disclosure can be more clearly understood according to the following detailed description, where:

[0021] Figure 1 is the front view of this application;

[0022] Figure 2 is the side view of this application;

[0023] Figure 3 is the partial sectional top view of this application;

[0024] Figure 4 is the partial sectional view of this application;

[0025] Figure 5 is Figure 4 the enlarged view of part A of

[0026] Figure 6 is the partial sectional view of the grain conveying pipe;

[0027] Figure 7 is the schematic diagram of the rice ear cutting group device;

[0028] Figure 8 is the side view of the rice ear cutting group device;

[0029] Figure 9 is the partial sectional view of the screening upper cover part;

[0030] Figure 10 is the schematic diagram of the threshing and conveying roller mechanism:

[0031] Figure 11 is the schematic diagram of the straw pickup device:

[0032] Figure 12 is Figure 11 the enlarged view of part B of

[0033] Figure 13 is Figure 2Enlarged view at position C

[0034] In the figure: 1. Header assembly; 101. Divider; 102. Reel; 103. Bracket group; 104. Cutter; 105. First-stage conveying group; 106. Second-stage conveyor belt; 110. Rice ear cutting group device; 111. Cutting table; 112. Third-stage conveying chain; 113. Third-stage conveying motor; 114. Rice ear cutter; 115. Ear pressing frame; 116. Sliding table; 117. Spring; 2. Threshing and conveying device; 201. Screening upper cover part; 2011. Feed pipe; 202. Screening pipe; 203. Screw assembly; 204. Screening pipe support; 205. Grain conveying pipe; 206. Grain conveying screw blade; 207. Grain conveying drive belt; 208. Transmission rod; 209. Threshing and conveying motor; 210. Threshing and conveying roller mechanism; 211. First-stage feeding round roller; 212. Feeding screw blade; 213. Second-stage threshing roller; 214. Striking part; 215. Third-stage mixing roller; 216. Mixing screw blade; 217. Fourth-stage threshing roller; 218. U-shaped threshing part; 219. Threshing drive belt; 3. Air separation bin device; 301. Air separation box; 302. Trapezoidal discharge port; 303. Discharge pipe; 304. Blower; 305. Vibrating screen; 306. Finished product conveying auger part; 307. Elevating auger part; 4. Grain bin; 5. Cab; 6. Traveling crawler group; 7. Straw stacking platform; 701. Rotating motor; 8. Straw pickup device; 801. Rotating assembly; 802. Straw scraping part; 803. Straw clamping motor; 804. Straw clamping part; 805. Rack; 806. Rack and pinion; 807. Gear rack; 808. Transition plate. Detailed implementation mode

[0035] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts belong to the scope of protection of the present application.

[0036] Embodiment 1

[0037] Please refer to attached Figure 1 attachment Figure 2 attachment Figure 3 attachment Figure 4 attachment Figure 5 attachment Figure 6 attachment Figure 7 attachment Figure 8 attachment Figure 9 attachment Figure 10 attachment Figure 11 attachment Figure 12, A combine harvester for grain harvesting, comprising a cutting table assembly 1, a threshing and conveying device 2, a winnowing bin device 3, a grain bin 4, a cab 5, a walking track group 6, a straw stacking platform 7, and a straw pickup device 8. The threshing and conveying device 2 is placed inside the cutting table assembly 1. One side of the threshing and conveying device 2 away from the cutting table assembly 1 is connected and installed with the winnowing bin device 3. The upper end of the winnowing bin device 3 is fixedly installed with the grain bin 4. One side of the grain bin 4 is provided with the cab 5. The walking track group 6 is installed at the lower ends of the winnowing bin device 3 and the cab 5. One end of the winnowing bin device 3 away from the threshing and conveying device 2 is installed with the straw stacking platform 7. One end of the straw stacking platform 7 away from the winnowing bin device 3 is movably installed with the straw pickup device 8. The operator enters the cab 5 and drives the harvester to enter the field for work through the movement of the walking track group 6. The cutting table assembly 1 harvests the rice, and the paddy is conveyed to the inside of the threshing and conveying device 2 through the conveying of the cutting table assembly 1 for threshing. After the threshing and conveying device 2 completes threshing, the grains and mixed sundries are conveyed to the inside of the winnowing bin device 3. The winnowing bin device 3 performs winnowing vibration screening on the grains and mixed sundries to discharge materials. The grains after screening are conveyed to the inside of the grain bin 4 for temporary storage. After the straw cut by the cutting table assembly 1 is discharged in the field, the straw in the field is collected by the straw pickup device 8 and transferred to the position of the straw stacking platform 7 for storage.

[0038] The cutting table assembly 1 includes a divider 101, a reel 102, a support group 103, a cutter 104, and a rice ear cutting group device 110. The divider 101 and the cutter 104 are respectively installed on one side of the support group 103. The reel 102 is placed at the upper end of the divider 101. The primary conveyor group 105 is placed above the support group 103. The primary conveyor group 105 is provided with two groups on the left and right, and the left and right primary conveyor groups 105 are mirror images. The secondary conveyor belts 106 are respectively placed on the sides of the left and right primary conveyor groups 105 away from the divider 101. One end of the secondary conveyor belt 106 away from the primary conveyor group 105 is placed with the rice ear cutting group device 110. When the cutting table assembly 1 is harvesting in the paddy field, the divider 101 guides and separates the crops, and then the reel 102 raises the lodged crops from bottom to top and conveys them to the position of the cutter 104. The cutter 104 cuts the crops at a height of 5 to 15 cm above the stubble. Then the primary conveyor group 105 conveys the cut crops to the position of the secondary conveyor belt 106. The secondary conveyor belt 106 converts the crops from vertical to horizontal during the conveying process, and the secondary conveyor belt 106 conveys the crops to the rice ear cutting group device 110.

[0039] The rice ear cutting group device 110 includes a cutting table 111, a three-stage conveying chain 112, a three-stage conveying motor 113, and a rice ear cutter 114. The cutting table 111 is placed on the lower side of one end of the second-stage conveyor belt 106. A long slot is provided at the center position of the cutting table 111. The three-stage conveying chain 112 is placed on the upper end of the cutting table 111. A driving wheel is installed on one side inside the three-stage conveying chain 112. A three-stage conveying motor 113 is fixedly installed at the center on one side of the driving wheel of the three-stage conveying chain 112. The three-stage conveying chain 112 and the three-stage conveying motor 113 are divided into upper and lower groups. The upper three-stage conveying chain 112 is placed on the upper end of the cutting table 111, and the lower three-stage conveying chain 112 is placed at the position of the long slot of the cutting table 111. A rice ear cutter 114 is fixedly installed on the side of the driving wheel of the upper three-stage conveying chain 112 away from the three-stage conveying motor 113. A spike pressing frame 115 is fixedly installed on one side of the cutting table 111 close to the rice ear cutter 114. A spring 117 is fixedly installed on one side at the lower end of the cutting table 111. A sliding table 116 is fixedly installed at the lower end of the spring 117. One end of the sliding table 116 away from the cutting table 111 is connected and installed with a threshing and conveying device 2.

[0040] Working principle of the rice ear cutting group device 110: The crop is conveyed by the second-stage conveyor belt 106 and falls onto the cutting table 111. The upper and lower three-stage conveying motors 113 are started to rotate in different directions respectively. The upper three-stage conveying motor 113 drives the three-stage conveying chain 112 to rotate towards the second-stage conveyor belt 106, and the lower three-stage conveying motor 113 drives the three-stage conveying chain 112 to rotate away from the second-stage conveyor belt 106, so that the upper and lower three-stage conveying chains 112 clamp the crop and move it away from the position of the second-stage conveyor belt 106. During the movement of the crop, the spike pressing frame 115 presses the crop tightly. At the same time, the rotation of the upper three-stage conveying chain 112 drives the rice ear cutter 114 to rotate. When the upper and lower three-stage conveying chains 112 clamp the crop and pass by the rice ear cutter 114, the rice ear cutter 114 cuts the position of the rice ear and the straw of the crop, so as to separate the straw and the rice ear. The straw continues to be conveyed by the upper and lower three-stage conveying chains 112 to the end and discharged into the field. The rice ear falls onto the sliding table 116. During the movement of the harvester, vibrations will occur. The vibrations cause the spring 117 to continuously expand and contract, so that the sliding table 116 bumps up and down. Moreover, the height of the cutting table 111 is higher than that of the threshing and conveying device 2. There is a height difference between the sliding table 116 connecting the cutting table 111 and the threshing and conveying device 2. The height difference of the sliding table 116 plus the up and down bumps brought by the spring 117 prevent the rice ears from piling up on the sliding table 116. The rice ears slide through the sliding table 116 into the inside of the threshing and conveying device 2.

[0041] The threshing and conveying device 2 includes a screening upper cover part 201, a feed pipe 2011, a screening pipe 202, a spiral assembly 203, a screening pipe support 204, and a threshing and conveying roller mechanism 210. One end of the sliding table 116 far from the cutting table 111 is connected to the feed pipe 2011. A feeding port is provided on the upper end surface of the feed pipe 2011 close to the sliding table 116, and the feeding port of the feed pipe 2011 is used for feeding rice ears. An opening is provided on one side of the feed pipe 2011, and the threshing and conveying roller mechanism 210 is placed at the opening position of the feed pipe 2011. One side end of the feed pipe 2011 far from the opening position is set as an open surface. The upper half peripheral wall of the open surface of the feed pipe 2011 is fixedly installed with the screening upper cover part 201, and the lower half peripheral wall of the open surface of the feed pipe 2011 is fixedly installed with the screening pipe 202. The number of the screening pipes 202 is multiple groups. The multiple groups of screening pipes 202 form a semi-circle along the lower half peripheral position of the open surface of the feed pipe 2011, and the multiple groups of screening pipes 202 are arranged at intervals. The gaps generated by the intervals of the multiple groups of screening pipes 202 are used to screen grains. The spiral assembly 203 is fixedly installed on the inner peripheral walls of the screening upper cover part 201 and the screening pipe 202. There are two groups of the spiral assemblies 203, and the two groups of spiral assemblies 203 are spaced at a certain distance and are arranged to rotate counterclockwise. Screening pipe supports 204 are fixedly installed on both sides of one end of the screening upper cover part 201 far from the feed pipe 2011. One end of the screening pipe support 204 far from the screening upper cover part 201 is fixedly installed on the winnowing bin device 3. The screening pipe support 204 serves as a support for fixing the feed pipe 2011, the screening upper cover part 201, and the screening pipe 202, so that the feed pipe 2011, the screening upper cover part 201, and the screening pipe 202 are kept fixed. A grain conveying pipe 205 is sleeved on the outer peripheral surface of the screening upper cover part 201. A grain conveying spiral blade 206 is fixedly installed on the inner peripheral surface of the grain conveying pipe 205. The grain conveying spiral blade 206 is arranged to rotate clockwise. The inner peripheral surface generated by the spiral of the grain conveying spiral blade 206 fits the outer perimeters of the screening upper cover part 201 and the screening pipe 202, so that the grain conveying spiral blade 206 rotates while fitting the outer peripheral surfaces of the screening upper cover part 201 and the screening pipe 202. One end of the grain conveying pipe 205 close to the sliding table 116 is sleeved with a grain conveying transmission belt 207. One end of the grain conveying transmission belt 207 is sleeved with a transmission rod 208. One end of the transmission rod 208 far from the grain conveying transmission belt 207 is belt-sleeved with a threshing and conveying motor 209.

[0042] Working principle of the threshing and conveying device 2: The rice ears slide down to the inside of the feed pipe 2011 through the sliding table 116. At this time, the threshing and conveying motor 209 starts to drive the transmission rod 208 to rotate counterclockwise. The rotation of the transmission rod 208 drives the threshing and conveying roller mechanism 210 and the grain conveying belt 207 to rotate. The rotation causes the threshing and conveying roller mechanism 210 to lift the conveyed grains and mixed sundries towards the position of the winnowing bin device 3. When the lifting process reaches the position of the screening pipe 202, the grains fall into the position on the outer peripheral surface of the screening pipe 202 through the set interval gaps of the screening pipe 202. The grain conveying belt 207 drives the grain conveying pipe 205 and the grain conveying spiral blade 206 to rotate. The grain conveying spiral blade 206 rotates counterclockwise along the outer peripheral surfaces of the screening upper cover part 201 and the screening pipe 202, causing the grains screened by the screening pipe 202 to be lifted towards the position of the winnowing bin device 3.

[0043] The threshing and conveying roller mechanism 210 includes a primary feed round roller 211, a feed spiral blade 212, a secondary threshing roller 213, a striking member 214, and a tertiary mixing roller 215. The threshing and conveying roller mechanism 210 is placed inside the feed pipe 2011, the screening upper cover part 201, and the screening pipe 202. One end of the primary feed round roller 211 is fixedly installed with the secondary threshing roller 213. The end of the primary feed round roller 211 far from the secondary threshing roller 213 passes through the opening position of the feed pipe 2011. A threshing transmission belt 219 is sleeved on the circumferential surface of the primary feed round roller 211 passing through the opening position of the feed pipe 2011. One end of the threshing transmission belt 219 far from the primary feed round roller 211 is sleeved on the transmission rod 208. One end of the secondary threshing roller 213 is fixedly installed with the tertiary mixing roller 215. The shape of the tertiary mixing roller 215 is set such that the diameters at both ends are large and the diameter at the middle position is small. One end of the tertiary mixing roller 215 far from the secondary threshing roller 213 is fixedly installed with a quaternary threshing roller 217. The outer peripheral surface of the primary feed round roller 211 is fixedly installed with the feed spiral blade 212. The outer peripheral surface of the secondary threshing roller 213 is fixedly installed with the striking member 214. The outer peripheral surface of the tertiary mixing roller 215 is fixedly installed with a mixing spiral blade 216. The outer peripheral surface of the quaternary threshing roller 217 is fixedly installed with a U-shaped threshing member 218. The spiral directions of the feed spiral blade 212, the striking member 214, the mixing spiral blade 216, and the U-shaped threshing member 218 are all clockwise, and the latter takes the end position of the former as the starting point in sequence.

[0044] Working principle of the threshing and conveying roller mechanism 210: When the rice ears enter the interior of the feed pipe 2011, the threshing and conveying motor 209 runs to drive the threshing transmission belt 219 to rotate counterclockwise. The rotation direction of the threshing transmission belt 219 is the same as that of the grain conveying transmission belt 207. The rotation of the threshing transmission belt 219 drives the first-stage feed round roller 211, the second-stage threshing roller 213, the third-stage mixing roller 215, and the fourth-stage threshing roller 217 to rotate. The rotation of the first-stage feed round roller 211, the second-stage threshing roller 213, the third-stage mixing roller 215, and the fourth-stage threshing roller 217 causes the feed spiral blade 212, the striking member 214, the mixing spiral blade 216, and the U-shaped threshing member 218 to rotate. The rotation of the feed spiral blade 212 pushes the rice ears towards the position of the second-stage threshing roller 213. The rotation of the striking member 214 on the second-stage threshing roller 213 threshes the rice ears by striking. The striking member 214 is the first to strike and thresh the rice ears. Then, the striking member 214 rotates and pushes the rice ears towards the position of the third-stage mixing roller 215. The mixing spiral blade 216 on the third-stage mixing roller 215 mixes the rice ears after the first strike, tumbles the inner-layer rice ears that are attached to the second-stage threshing roller 213 to the outer layer. The mixing spiral blade 216 pushes the mixed rice ears to the U-shaped threshing member 218 on the fourth-stage threshing roller 217. The U-shaped threshing member 218 performs a second strike and threshing on the mixed rice ears. The counterclockwise design of the spiral assembly 203 assists the striking and threshing of the striking member 214 and the U-shaped threshing member 218 and the pushing of the rice ears to move. After the rice ears are threshed, they are screened through the screening pipe 202 and sent to the interior of the grain conveying pipe 205. The grain conveying spiral blade 206 rotates and lifts them to the position of the air separation bin device 3. The design of the third-stage mixing roller 215 and the mixing spiral blade 216 avoids the problem that the inner-layer rice ears are always in the inner layer and receive less striking and are not sufficiently threshed. Using the striking member 214 and the U-shaped threshing member 218 to strike and thresh twice makes the rice ears threshed more completely and increases the amount of threshed rice ears.

[0045] The air separation bin device 3 includes an air separation box 301, a trapezoidal discharge port 302, a discharge pipeline 303, a blower 304, and a vibrating screen 305. A circular through-hole is provided at a position of the air separation box 301 close to the threshing and conveying device 2. The circular through-hole of the air separation box 301 allows the grain conveying pipe 205 to pass through, so that one end of the threshing and conveying device 2 extends into the interior of the air separation box 301. The lower end surface of the air separation box 301 is a baffle inclined towards the threshing and conveying device 2. Baffles are installed on the upper end surface and both side surfaces of the air separation box 301. A trapezoidal discharge port 302 is fixedly installed at one end of the air separation box 301 away from the threshing and conveying device 2. One end of the trapezoidal discharge port 302 away from the air separation box 301 is fixedly installed with a discharge pipeline 303. The two ends of the outlet of the discharge pipeline 303 extend towards both sides of the walking track group 6, so that the discharge of the discharge pipeline 303 is discharged to both sides of the harvester. A vibrating screen 305 is placed inside the air separation box 301. The vibrating screen 305 is placed obliquely, with the position of the threshing and conveying device 2 being the lower position and the position of the trapezoidal discharge port 302 being the higher position. A blower 304 is placed at the lower position of the vibrating screen 305, and the air outlet of the blower 304 faces the vibrating screen 305. A finished product conveying auger 306 is fixedly installed at the inclined baffle at the lower end of the air separation box 301. A lifting auger 307 is installed at a position on one side of the finished product conveying auger 306 away from the cab 5. One side of the upper end of the lifting auger 307 is installed with a grain bin 4. The lifting auger 307 passes through the bottom of the grain bin 4 and extends into the interior of the grain bin 4.

[0046] Working principle of the winnowing bin device 3: After the rice ears are threshed by the threshing and conveying device 2, they are turned into grains and mixed impurities. The weight of the grains is greater than that of the mixed impurities. One end of the grain conveying pipe 205 inside the winnowing box 301 is shorter than the screening upper cover part 201 and the threshing and conveying roller mechanism 210, so that the grains coming out of the grain conveying pipe 205 are closer to the blower 304. The mixed impurities pushed by the threshing and conveying roller mechanism 210 fall into the inside of the winnowing bin device 3, which is farther away from the blower 304. At this time, the blower 304 and the vibrating screen 305 are started. The grains coming out of the grain conveying pipe 205 are closer to the blower 304, so the wind force is greater, which can more powerfully blow the impurities mixed in the grains. The mixed impurities coming out of the screening upper cover part 201 are affected by the wind force and are blown to the position of the trapezoidal discharge port 302. The grains fall onto the vibrating screen 305 under the influence of gravity, and the mixed impurities enter the inside of the discharge pipe 303 and are discharged from the outlet of the discharge pipe 303 to both sides of the harvester. The vibrating screen 305 vibrates the falling grains repeatedly for screening, and cooperates with the blower 304 to blow away the mixed impurities. The grains screened by the vibrating screen 305 fall to the inclined baffle at the lower end of the winnowing box 301, and the grains slide along the inclined baffle at the lower end of the winnowing box 301 into the finished product conveying auger part 306. The finished product conveying auger part 306 conveys the grains to the lifting auger part 307 through the auger, and the lifting auger part 307 lifts the grains into the inside of the grain bin 4 for collection and storage.

[0047] One end of the straw stacking platform 7 is fixedly connected to the trapezoidal discharge port 302. One side of the lower end surface of the straw stacking platform 7 is fixedly installed with a rotating motor 701. One end of the straw stacking platform 7 away from the trapezoidal discharge port 302 is connected to a straw picking device 8. The straw picking device 8 includes a rotating assembly 801, a straw scraping member 802, a straw clamping motor 803, a straw clamping member 804, and a rack 805. The rotating assembly 801 is electrically connected to both sides of the rotating motor 701. One end surface of the rotating assembly 801 is fixedly installed on one end surface of the straw stacking platform 7. A transition plate 808 is placed on the upper end surface of the rotating assembly 801. One end of the transition plate 808 is fixedly installed on one end surface of the straw stacking platform 7. One end surface of the rotating assembly 801 away from the straw stacking platform 7 is fixedly connected to a straw scraping member 802. The straw scraping member 802 is set in two groups as a set, and the two groups of straw scraping members 802 are divided into upper and lower groups of straw scraping members 802. Every two straw scraping members 802 are arranged oppositely. The shape of the straw scraping member 802 is set as a semi-circle. A straw clamping motor 803 is fixedly installed on the outer peripheral surface of the semi-circle of the straw scraping member 802. A straw clamping member 804 is clamped at the middle position of every two straw scraping members 802. The shape of the straw clamping member 804 is set as a major arc. One end of the straw clamping member 804 is set as a pointed end, and the direction away from the pointed end of the straw clamping member 804 is set as a wide end. The pointed end of the straw clamping member 804 is set to better insert into the straw. A sawtooth group is arranged on the inner circumference of the straw clamping member 804. The sawteeth of the straw clamping member 804 are arranged along the inclined direction of the pointed end of the straw clamping member 804. Please refer to the appendix Figure 13, the lower part of a single serration of the straw clamping member 804 on the lower group of straw scraping members 802 is set as the pointed direction of the straw clamping member 804, and the upper part is away from the pointed head of the straw clamping member 804. The function of the straw clamping member 804 is as follows: when the pointed direction of the straw clamping member 804 on the lower group of straw scraping members 802 extends circumferentially, and the straw clamping member 804 clamps the straw, the lower part of each serration of the straw clamping member 804 extending forward will not obstruct the straw. When the lower group of straw scraping members 802 rotates to the position of the upper group of straw scraping members 802, the original position of the lower group of straw scraping members 802 becomes the upper group of straw scraping members 802, and the straw clamping member 804 retracts, so that the space is opened in the direction where the straw scraping member 802 is close to the rotating assembly 801 for the straw to fall out. At this time, during the retraction process of the straw clamping member 804, the movement direction of the upper part of each serration of the straw clamping member 804 is forward, and each upper serration of the straw clamping member 804 pushes the straw to slide in the direction of the rotating assembly 801, accelerating the sliding speed of the straw and avoiding the accumulation of straw. A circular circumferential strip groove is arranged inside the straw clamping member 804, a rack 805 is fixedly installed in the circular circumferential strip groove of the straw clamping member 804, a gear bar 806 is meshed and installed on the surface of the rack 805, the gear bar 806 penetrates through the circular circumferential strip groove of the straw clamping member 804, gear racks 807 are respectively sleeved at both ends of the gear bar 806, and one end of the gear rack 807 away from the gear bar 806 is fixedly installed on one side wall of the straw scraping member 802. Belts are sleeved on the outer circumferential surfaces on both sides of the gear bar 806, and the belts of the gear bar 806 are connected in series with the motor shaft of the straw clamping motor 803.

[0048] Working principle of the straw stacking platform 7 and the straw pickup device 8: After the straw cut by the rice ear cutting group device 110 falls into the field, the lower straw scraping member 802 scrapes up the straw in the field at a position far from the rotating assembly 801 and accumulates it at the semi-circular position of the straw scraping member 802. When the accumulation reaches a certain level, the straw clamping motor 803 on the lower straw scraping member 802 starts. The belt on the motor shaft of the straw clamping motor 803 drives the gear rack 806 to rotate. The rotation of the gear rack 806 moves on the surface of the rack 805, thereby driving the straw clamping member 804 to extend circumferentially towards the pointed end of the straw clamping member 804, so that the straw clamping member 804 closes the vacant semi-circular position of the straw scraping member 802, achieving the purpose of clamping the straw. At this time, the rotation motor 701 starts, causing the rotating assembly 801 to rotate. The rotating assembly 801 drives the lower straw scraping member 802 to rotate to the position of the upper straw scraping member 802. The original lower straw scraping member 802 becomes the upper straw scraping member 802. At this time, the motor shaft of the straw clamping motor 803 changes the direction of rotation, and the straw clamping motor 803 drives the gear rack 806 to rotate in the reverse direction. The gear rack 806 drives the straw clamping member 804 to retract circumferentially towards the wide end of the straw clamping member 804, so that the straw clamping member 804 opens the vacant semi-circular position of the straw scraping member 802 for the straw to slide. The straw slides to the upper end of the straw stacking platform 7 through the transition plate 808.

[0049] Overall working principle of the harvester: The operator enters the cab 5 to start the harvester and reaches the field by the movement of the traveling crawler group 6. The divider 101 on the cutter bar assembly 1 guides the rice, the reel 102 straightens the lodged rice, and the support group 103 harvests the rice. The rice is conveyed to the position of the cutting table 111 through the primary conveying group 105 and the secondary conveyor belt 106. When the upper and lower tertiary conveying chains 112 convey the rice past the rice ear cutter 114, the rice ear cutter 114 cuts the rice ears. The upper and lower tertiary conveying chains 112 continue to convey the straw, and the straw is conveyed to the end of the cutting table 111 far from the secondary conveyor belt 106 and discharged into the field. The position where the straw is discharged is at the front end of the advancing direction of the traveling crawler group 6, so that the surface of the traveling crawler group 6 presses on the straw, reducing the pressure of the self-weight of the harvester on the ground. The straw plays a buffering role, achieving the reduction of damage to the field, reducing the death of crayfish caused by being crushed, and improving the survival rate of crayfish.

[0050] The cut rice ears slide down to the inside of the feeding pipe 2011 through the sliding table 116, and are threshed by the rotation of the threshing and conveying roller mechanism 210. The rice ears are separated into grains and mixed impurities. When the grains and mixed impurities reach the position of the screening pipe 202 through the conveyance of the threshing and conveying roller mechanism 210, the grains are screened by the screening pipe 202, and the grains fall into the inside of the grain conveying pipe 205. The grain conveying spiral blade 206 conveys the grains to the inside of the winnowing box 301. At the same time, the mixed impurities are also conveyed to the inside of the winnowing box 301 by the threshing and conveying roller mechanism 210. The grains and mixed impurities are conveyed to different positions respectively through the vibration screening and winnowing by the blower 304 and the vibrating screen 305. The mixed impurities are blown by the wind to the position of the trapezoidal discharge port 302 and discharged to both sides of the harvester through the discharge pipe 303. The grains fall through the vibrating screen 305 onto the inclined baffle at the lower end of the winnowing box 301 and slide into the finished product conveying auger 306. The grains are transferred and stored into the inside of the grain bin 4 through the finished product conveying auger 306 and the lifting auger 307. The harvester continues to harvest forward. The straw that falls into the field is collected by the straw scraping part 802 and the straw clamping part 804, and transferred and stored on the upper end of the straw stacking platform 7 for storage, avoiding excessive straw accumulation in the field, which affects the emergence of crayfish from the soil. At the same time, it avoids the humus of excessive straw in the field from affecting the living environment of crayfish, and causing fire and environmental pollution caused by burning straw, and the death of crayfish fry caused by the fire, realizing the functions of protecting the environment, improving the protection of crayfish fry, and integrating harvesting and reaping.

Claims

1. A combine harvester for grain harvesting, comprising: Cutting table assembly (1), characterized in that: a rice ear cutting group device (110) is placed inside the cutting table assembly (1), a threshing and conveying device (2) is connected to one side of the rice ear cutting group device (110), a threshing and conveying roller mechanism (210) is placed inside the threshing and conveying device (2), an air separation bin device (3) is connected to one end of the threshing and conveying roller mechanism (210), the threshing and conveying device (2) is internally communicated with the air separation bin device (3), a grain bin (4) is fixedly installed at the upper end of the air separation bin device (3), a cab (5) is placed on one side surface of the air separation bin device (3) and the grain bin (4), a walking track group (6) is connected to the lower end of the air separation bin device (3), a straw stacking platform (7) is connected to one end of the air separation bin device (3) far away from the threshing and conveying device (2), a rotating motor (701) is fixedly installed on the lower end surface of the straw stacking platform (7), and a straw picking device (8) is installed on one end surface of the straw stacking platform (7) far away from the air separation bin device (3).

2. The combine harvester for harvesting grains according to claim 1, wherein: The cutting table assembly (1) includes a divider (101), a reel (102), a bracket group (103), a cutter (104), and a rice ear cutting group device (110). The divider (101) and the cutter (104) are respectively installed on one side of the bracket group (103). The reel (102) is placed at the upper end of the divider (101). A primary conveying group (105) is placed above the bracket group (103). A secondary conveyor belt (106) is placed on one side of the primary conveying group (105) far away from the divider (101). The primary conveying group (105) and the secondary conveyor belt (106) are provided in two groups. The two groups of primary conveying groups (105) and secondary conveyor belts (106) are horizontally mirror - set. The rice ear cutting group device (110) is placed on one side of the two groups of secondary conveyor belts (106) far away from the primary conveying group (105).

3. The combine harvester for harvesting grains according to claim 2, characterized in that: The rice ear cutting group device (110) includes a cutting table (111), a tertiary conveying chain (112), a tertiary conveying motor (113), and a rice ear cutter (114). A driving wheel is placed inside the tertiary conveying chain (112). A tertiary conveying motor (113) is fixedly installed at the center on one side of the driving wheel of the tertiary conveying chain (112). The tertiary conveying chain (112) and the tertiary conveying motor (113) are divided into upper and lower groups. The cutting table (111) is placed at the upper end of the lower tertiary conveying chain (112). A rice ear cutter (114) is fixedly installed on one side of the driving wheel of the upper - group tertiary conveying chain (112) far away from the tertiary conveying motor (113). A spike - pressing frame (115) is fixedly installed on one side surface of the cutting table (111) close to the rice ear cutter (114). A spring (117) is fixedly installed on one side of the lower end of the cutting table (111). The lower end of the spring (117) is fixedly installed on a sliding table (116). One end of the sliding table (116) far away from the cutting table (111) is connected to the threshing and conveying device (2).

4. The combine harvester for harvesting grains according to claim 1, characterized in that: The threshing and conveying device (2) includes a screening upper cover part (201), a feed pipe (2011), a screening pipe (202), a spiral assembly (203), a screening pipe support (204), and a threshing and conveying roller mechanism (210). One end of the sliding table (116) far from the cutting table (111) is connected to a feed pipe (2011). An opening is provided on one side of the feed pipe (2011). The threshing and conveying roller mechanism (210) is placed at the opening position of the feed pipe (2011). One side end of the feed pipe (2011) far from the opening position is set as an open surface. The upper half circumferential wall of the open surface of the feed pipe (2011) is fixedly installed with a screening upper cover part (201). The lower half circumferential wall of the open surface of the feed pipe (2011) is fixedly installed with a screening pipe (202). A spiral assembly (203) is fixedly installed on the inner circumferential walls of the screening upper cover part (201) and the screening pipe (202). Screening pipe supports (204) are fixedly installed on both sides of one end of the screening upper cover part (201) far from the feed pipe (2011). One end of the screening pipe support (204) far from the screening upper cover part (201) is fixedly installed on the winnowing bin device (3). A grain conveying pipe (205) is sleeved on the outer circumferential surface of the screening upper cover part (201). A grain conveying spiral blade (206) is fixedly installed on the inner circumferential surface of the grain conveying pipe (205). One end of the grain conveying pipe (205) close to the sliding table (116) is sleeved with a grain conveying belt (207). One end of the grain conveying belt (207) is sleeved with a transmission rod (208). One end of the transmission rod (208) far from the grain conveying belt (207) is belt-sleeved with a threshing and conveying motor (209).

5. The combine harvester for harvesting grains according to claim 4, wherein: The threshing and conveying roller mechanism (210) includes a primary feed round roller (211), a feed spiral blade (212), a secondary threshing roller (213), a striking part (214), and a tertiary mixing roller (215). One end of the primary feed round roller (211) is fixedly installed with a secondary threshing roller (213). One end of the primary feed round roller (211) far from the secondary threshing roller (213) is sleeved with a threshing belt (219). One end of the threshing belt (219) far from the primary feed round roller (211) is sleeved on the transmission rod (208). One end of the secondary threshing roller (213) is fixedly installed with a tertiary mixing roller (215). One end of the tertiary mixing roller (215) far from the secondary threshing roller (213) is fixedly installed with a quaternary threshing roller (217). A feed spiral blade (212) is fixedly installed on the outer circumferential surface of the primary feed round roller (211). A striking part (214) is fixedly installed on the outer circumferential surface of the secondary threshing roller (213). A mixing spiral blade (216) is fixedly installed on the outer circumferential surface of the tertiary mixing roller (215). A U-shaped threshing part (218) is fixedly installed on the outer circumferential surface of the quaternary threshing roller (217).

6. The combine harvester for harvesting grains according to claim 5, wherein: The spiral directions of the feeding spiral blade (212), the striking part (214), the mixing spiral blade (216), and the U-shaped threshing part (218) are the same, and the latter successively starts from the end position of the former. The three-stage mixing roller (215) is shaped such that the diameters at both ends are large and the diameter at the middle position is small.

7. The combine harvester for harvesting grains according to claim 1, characterized in that: The winnowing bin device (3) includes a winnowing box (301), a trapezoidal discharge port (302), a discharge pipe (303), a blower (304), and a vibrating screen (305). A circular through-hole is provided at a position of the winnowing box (301) close to the threshing and conveying device (2). The circular through-hole of the winnowing box (301) allows the grain conveying pipe (205) to pass through. The lower end of the winnowing box (301) is a baffle inclined towards the threshing and conveying device (2). A trapezoidal discharge port (302) is fixedly installed at one end of the winnowing box (301) away from the threshing and conveying device (2). A discharge pipe (303) is fixedly installed at one end of the trapezoidal discharge port (302) away from the winnowing box (301). A blower (304) is placed inside the winnowing box (301). The air outlet of the blower (304) faces the vibrating screen (305). A finished product conveying auger part (306) is placed at one side end of the winnowing box (301) away from the trapezoidal discharge port (302). A lifting auger part (307) is installed at a position on one side of the finished product conveying auger part (306) away from the cab (5). A granary (4) is installed at one side of the upper end of the lifting auger part (307).

8. The combine harvester for harvesting grains according to claim 1, wherein: The straw picking-up device (8) includes a rotating assembly (801), a straw scraping part (802), a straw clamping motor (803), a straw clamping part (804), and a rack (805). A rotating assembly (801) is installed on one end face of the straw stacking platform (7). A transition plate (808) is placed at the upper end of the rotating assembly (801). A straw scraping part (802) is fixedly connected to one end face of the rotating assembly (801) away from the straw stacking platform (7). The straw scraping parts (802) are arranged in groups of two and there are two groups in total. The straw scraping part (802) is shaped like a semi-circle. A straw clamping motor (803) is fixedly installed on the outer peripheral surface of the semi-circle of the straw scraping part (802). A straw clamping part (804) is clamped at the middle position between every two straw scraping parts (802). A circular circumferential strip groove is provided inside the straw clamping part (804). A rack (805) is fixedly installed in the circular circumferential strip groove of the straw clamping part (804). A gear rack (806) is meshed and installed on the surface of the rack (805). Gear racks (807) are respectively sleeved at both top ends of the gear rack (806).

9. The combine harvester for harvesting grains according to claim 8, wherein: The shape of the straw clamping member (804) is set as a superior arc. One end of the straw clamping member (804) is set as a pointed end, and the direction away from the pointed end of the straw clamping member (804) is set as a wide end. A sawtooth group is arranged on the inner circumference of the straw clamping member (804), and the sawteeth of the straw clamping member (804) are arranged along the inclined direction of the pointed end of the straw clamping member (804).

Images