Corn harvester additionally provided with backpack type free threshing device

Abstract

The utility model discloses a corn harvester additionally provided with a backpack type free threshing device, which comprises a main vehicle, a grain collecting unit, a threshing unit, a sieve plate fan unit, a residue cleaning unit, a grain collecting unit, a power unit and a clutch device, a grain collecting box is arranged on the main vehicle, and the grain collecting unit is arranged in the grain collecting box; a surrounding frame is arranged on the main vehicle on the rear side of the grain collecting box, and side vertical plates are arranged on the two sides of the surrounding frame; the threshing unit, the sieve plate fan unit, the residue cleaning unit, the grain collecting unit and the power unit are all mounted on the enclosure frame; a threshing unit is arranged on the enclosure frame on the rear side of the grain collecting unit; a sieve plate fan unit is arranged on the enclosure frame on one side of the threshing unit; a residue cleaning unit is arranged below the sieve plate fan unit and on the enclosure frame; a grain collecting unit is arranged below the threshing unit and on the enclosure frame; and the power unit and the clutch device are arranged below one side of the enclosure frame. According to the corn harvester, an original corn harvester has the threshing function, and free conversion between the direct harvesting function and the independent corn cob harvesting function can be achieved during corn harvesting operation.

Description

Technical Field

[0001] This utility model relates to a corn harvester equipped with a backpack-type free threshing device, belonging to the field of agricultural machinery technology. Background Technology

[0002] Some existing corn harvesters only have the function of harvesting and peeling corn cobs, but lack the function of directly threshing them after harvesting and peeling. As a result, a threshing machine is needed to thresh the corn cobs separately after harvesting, which reduces work efficiency. With the development of the times and the increasing aging of rural populations, corn harvesting is gradually developing towards direct corn harvesters. This makes the existing corn harvesters, which lack threshing devices, face low work efficiency. Replacing them would incur significant economic costs, and choosing to replace them with existing corn harvesters in good condition would result in substantial economic losses for agricultural machinery users. Moreover, if corn is harvested directly before it is fully mature due to weather or other factors, the corn cobs will be crushed, reducing corn yield and wasting usable grain resources. Some large corn harvesters also crush and scatter the corn cobs without collecting them, resulting in the waste of corn cobs as energy. Utility Model Content

[0003] To solve the above problems, this utility model provides a corn harvester equipped with a backpack-type free threshing device. This utility model adds a corn threshing device to the original corn ear picking and threshing machine, enabling the original corn harvester to have a threshing function. It can freely switch between direct harvesting and separate corn cob harvesting functions as needed during corn harvesting operations.

[0004] The technical solution adopted by this utility model to solve its technical problem is as follows: a corn harvester equipped with a backpack-type free threshing device, including a main carriage, a grain collection unit, a threshing unit, a screen plate and fan unit, a residue cleaning unit, a grain collection unit, a power unit, and a clutch device. The main carriage is the original corn ear-picking and threshing machine, on which a grain collection box in the shape of an inverted trapezoid is installed, and the grain collection unit is installed in the grain collection box. At the rear of the grain collection box, a retaining frame is fixed on the main carriage. The bottom of the retaining frame is connected to the rear of the main carriage by a connecting plate and bolts. Side uprights are fixed to the side, protruding above the enclosure frame; the threshing unit, screen fan unit, residue cleaning unit, grain collecting unit, and power unit are all installed on the enclosure frame; the threshing unit is installed on the enclosure frame behind the grain collecting unit; the screen fan unit is installed on the enclosure frame on one side of the threshing unit; the residue cleaning unit is installed on the enclosure frame below the screen fan unit; the grain collecting unit is installed on the enclosure frame below the threshing unit; the power unit and clutch device are installed at the lower position on one side of the enclosure frame, with the clutch device arranged adjacent to the power unit.

[0005] Furthermore, the main vehicle's grain collection box is equipped with a grain collection port. On both sides of the grain collection port, two sliders are fixed on the grain collection box. A tie rod is welded to the middle of the rear end panel of the grain collection box. Two annular lugs I are welded to the unloading end of the grain collection box. A transverse pressure plate is provided on the outside of lug I. The grain collection box shaft is hinged and inserted through the two inclined beams at the unloading end of the grain collection box. The grain collection box shaft is also inserted inside lug I. The grain collection box shaft and lug I are fixed with set screws. Two connecting pins are also fixed at the inclined beams at the unloading end of the grain collection box.

[0006] Furthermore, the grain collecting unit includes a grain collecting auger, a lifting auger, and a lifting support. The grain collecting auger has a semi-circular outer shell and a spiral roller installed inside. Bearing seats are installed at both ends of the grain collecting auger. Below the bearing seats, a connecting shaft is provided on the outer shell of the grain collecting auger. Sliding sleeves are hinged to the connecting shaft by cotter pins, and the two sliding sleeves are located inside the two sliders. The grain inlet end of the grain collecting auger matches the grain collecting port, and an inclined cylindrical lifting auger is installed at the grain outlet end of the grain collecting auger. The grain outlet end of the grain collecting auger... The lifting auger is interconnected, and a spiral roller is installed inside the lifting auger. The grain discharge end of the lifting auger has two spaced sprockets. The power input shaft of the grain collecting auger is installed on the outer wall of the lifting auger through the lugs. A sprocket is installed on the upper end of the power input shaft of the grain collecting auger. The sprocket on the power input shaft is connected to the lower sprocket on the lifting auger through a chain to form a sprocket group. The lower end of the power input shaft of the grain collecting auger is connected to a bevel gear box through a coupling. The power output end of the bevel gear box is connected to the grain collecting spiral roller shaft of the grain collecting auger.

[0007] A lifting support is hinged below the grain discharge end of the lifting auger. The lifting support consists of two parallel plates, with a grain receiving box assembly welded to the upper end of each plate. The two plates are welded to the back plate at the rear of the grain receiving box. The upper part of the box is completely open, while the bottom is semi-open. A hinged connecting plate is installed inside the box, with one end of the hinged connecting plate hinged to the grain discharge end of the lifting auger. A connecting plate is welded to the side wall of the box, and a bevel gear box and a protective cover are installed on the connecting plate. The input end of the bevel gear box at the box uses a flat key and snap ring structure to install a driven gear, and the output end of the bevel gear box is equipped with a sprocket. This sprocket is connected to the upper sprocket on the lifting auger via a chain, forming a sprocket assembly. The grain discharge end of the lifting auger is located at the top of the box. A hydraulic cylinder is installed between the lifting support and the lifting auger. The hydraulic cylinder is connected to an oil circuit, and the piston end of the hydraulic cylinder is hinged to the bottom of the lifting auger.

[0008] Furthermore, the threshing unit includes a grain feeding auger and a threshing auger. Above the enclosure frame, the grain feeding auger and the threshing auger are arranged adjacent to each other. One end of the grain feeding auger is installed on the side upright plate, and the other end of the grain feeding auger is installed on the support plate of the enclosure frame. The grain feeding auger has a semi-open structure, and the upper part of the open end of the grain feeding auger is the grain outlet end at the bottom of the box above the lifting support. The bottom of the grain outlet end of the grain feeding auger is connected to the bottom of the grain inlet end of the threshing auger.

[0009] Both the grain feeding auger and the threshing auger have bearing seats installed at their shaft ends. On the outside of one side of the bearing seat, a pulley is installed at the shaft end of both the grain feeding auger and the threshing auger. Power transmission between the grain feeding auger and the threshing auger is achieved through a belt.

[0010] The grain feeding auger has a grain feeding roller in the middle. At the end of the grain feeding roller away from the pulley, a set of double sprockets is installed at the head of the grain feeding roller shaft. At the end of the grain feeding auger away from the pulley, there is also a shaft lug II and a support. One end of the flat fork is hinged to the shaft lug II. After the flat fork is assembled into the shaft lug II, it is positioned by a snap ring. The flat fork is a combination of two arc-shaped plates. A short shaft is provided in the middle of the two plates. Coaxial through holes are provided on both sides of the flat plate combination. A drive wheel and a sprocket are mounted on the shaft on the other side of the flat fork. The drive wheel is meshed with the driven gear. The sprocket on the inner side of the double sprocket on the grain feeding roller shaft is connected to the sprocket on the flat fork shaft through a transmission chain to form a sprocket group. The lower part of the flat fork is a support. After the adjusting screw is screwed into the threaded hole on the short shaft in the middle of the flat fork, it rests on the support. Rotating the adjusting screw can adjust the position of the drive wheel.

[0011] The threshing auger includes an arc-shaped cover plate, adjustable screen plates, a long filament adjustment seat, a long adjustment wire, and a discharge port. The outer ring of the threshing auger is a screen-shaped cylinder. The internal shaft of the threshing auger is a roller with guide vanes and spirally arranged kneading blocks. The outer ring of the threshing auger is bolted to the two side uprights. The two ends of the internal shaft are connected to bearing seats and then bolted to the two side uprights. The surface of the outer ring of the threshing auger is provided with an inspection window, a long filament adjustment seat, and a discharge port. The inspection window is covered with an arc-shaped cover plate, which is fixed to the inspection window with bolts. Several adjustable screen plates are hinged to the inner side of the outer ring of the threshing auger. The long adjustment wire is a long screw that is screwed into the long filament adjustment seat and hinged to the movable edge of the adjustable screen plate. At the end of the long adjustment wire, there is a discharge port at the bottom of the cylinder. A touch signal device is installed at the end of the grain feeding auger away from the pulley, and the touch signal device is in contact with the driven gear.

[0012] Furthermore, the screen plate blower unit includes a blower, a screen frame assembly, and a set of screens. Several support blocks are fixed on the enclosure frame. The blower is installed between the side uprights and the support blocks, and a pulley is installed at one end of the blower shaft. The set of screens is a three-stage screen and a single-stage screen structure. From top to bottom, the first screen is a serrated fine flat screen, the second screen is a fine frame screen with a trough for loose impurities and an inclined angle that rises towards the first screen at the trough, and the third screen is a coarse frame screen. The plate is a grain receiving plate with a frame located at the bottom of the three screens, broken into two sections in the middle and inclined downwards. The third screen has a grain outlet facing the main vehicle end. The three screens and the single-stage screen are connected by bolts. The unit is assembled into a screen assembly, located on one side of the blower and mounted on the enclosure frame. The screen frame assembly consists of a single optical shaft mounted on the support block of the enclosure frame. A sprocket is installed in the middle of the optical shaft, and eccentric guide wheels are installed at both ends of the optical shaft. Rockers are hinged to the guide wheels, and the other end of the rockers is hinged to a U-shaped frame. Axles are provided on the outer sides of both ends of the U-shaped frame, and rollers are installed on the axles. The lower part of the rollers is provided with a slide rail made of angle iron. The angle iron is bolted to two longitudinal beams inside the enclosure frame. The U-shaped frame is bolted to the screen assembly as a whole, and the screen assembly is located on the upper part of the U-shaped frame. Anti-slip plates are bolted to the upper part of the rollers to prevent the rollers from falling off the slide rails.

[0013] Furthermore, the waste removal unit includes a grain box and a bran box. The grain box is fixed to one side inside the enclosure frame, and the bran box is fixed to the other side inside the enclosure frame. The grain box is an inverted triangular box with two hanging ears on the top. Bolts pass through the hanging ears to install the grain box on the enclosure frame and hang it below the screen assembly.

[0014] The grain box has an open bottom and a hinged flip door that is hinged by a pin. The side wall of the grain box has a locking structure. The upper and lower handles of the locking structure are hinged to a through shaft that runs through the inside of the grain box. The upper and lower handles have grooves inside, and spring plates are installed in the grooves. The spring plate has a pin in the middle, which is inserted into the hole of the lock lug welded to the side wall of the grain box. The upper part of the upper handle has a protruding hanging arm. A pin with a central through hole is installed at the hanging arm by a snap ring. The long locking rod passes through the through hole of the pin and is then pressed into the spring and tightened into a nut to assemble the whole. The lower part of the long locking rod (5016) has a hole that is hooked onto the hanging pin protruding from the side of the flip door.

[0015] A lower flap is installed below the bran box, which is hinged to the bottom of the enclosure frame by a pin. A counterweight is welded to the bottom of the lower flap, and the counterweight part of the counterweight extends beyond the hinge point and is located outside the lower flap. A limiting screw is installed at the lug welded on the enclosure frame, and the limiting screw is located above the counterweight. At the parallel position of the limiting screw, a touch signal device is bolted to the enclosure frame. The touch signal device is electrically connected to the main workshop, and a signal alarm is installed in the main vehicle. A perforated plate is welded to the end of the enclosure frame away from the power unit, and the perforated plate forms the frame of the bran box.

[0016] The grain collection unit includes a grain collection box, a grain lifting auger, and a blower. The grain collection box is an inverted trapezoidal box with an open top. The grain collection box is located below the grain outlet of the third screen in the group of screens. The upper part of the grain collection box is provided with hanging ears. Bolts pass through the hanging ears to connect the grain collection box to the enclosure frame. The grain collection box has two openings, one at the top and one at the bottom. The grain lifting auger is installed on the side wall of the grain collection box and communicates with the lower opening of the grain collection box.

[0017] The two ends of the grain lifting auger are connected by threaded bearing seats. The upper bearing seat is connected to a bevel gear box, which is bolted to the support block of the enclosure frame. Two sprockets are installed on the input shaft of the bevel gear box. The inner sprocket on the input shaft of the bevel gear box is connected to the outer sprocket of the double sprocket on the grain feeding roller shaft through a transmission chain. The outer sprocket on the input shaft of the bevel gear box is connected to the sprocket on the optical shaft through a transmission chain.

[0018] The grain-raising auger is equipped with a grain receiving plate, a connecting fork, a grain-raising lock lug, and a sliding fork. The grain receiving plate is hinged to the grain outlet at the upper end of the grain-raising auger. The connecting fork is hinged to the grain receiving plate. The connecting fork is a U-shaped fork with a folded edge. A long threaded rod is provided at the closed edge of the connecting fork. After the spring passes through the threaded rod of the connecting fork, it passes through the through hole welded to the grain-raising lock lug on the outer wall of the grain-raising auger. A sliding fork is fixed in the hole at the bottom of the threaded rod of the connecting fork. The sliding fork abuts against the bottom of the pull rod.

[0019] The blower is bolted to the side plate of the bran bin, and the blower's air inlet is connected to the grain collection bin. A pulley is installed at the power input end of the blower, and the power is transmitted to the pulley at the power output end of the threshing auger via a belt. An adjusting air plate is provided at the air outlet end of the blower, and the adjusting air plate is hinged to the air outlet end face of the blower by an L-shaped long pin. The adjusting air plate and the long pin are integrated. A locking plate is fixed to the side wall of the air outlet of the blower. The pin is a pin with a stepped platform in the middle and a thread at one end. The spring is put on the stepped platform of the pin, and then the threaded end of the pin is passed through the hole on the short side of the long pin and the nut is tightened to assemble it into a whole.

[0020] Furthermore, the power unit includes an engine, a gearbox, a battery, and a fuel tank. The engine is mounted on a support plate on the side of the enclosure frame near the grain bin. The fuel tank is arranged adjacent to the engine, and a chimney is provided on the engine. Above the engine, a gearbox is mounted on the enclosure frame, and the input end of the gearbox is connected to the drive end of the engine via a belt. Above the fuel tank, a battery is mounted on the enclosure frame, arranged adjacent to the gearbox, and electrically connected to the engine. The output end of the gearbox is connected to a pulley at one end of the threshing auger via a belt.

[0021] The clutch mechanism includes a clutch screw, a clutch rocker arm, a clutch crank, a clutch plate, and a clutch fan plate. The clutch screw is a threaded rod with a cap. After being fitted with a spring, the clutch screw is inserted into a hinged pin hole inside the upper connecting pin plate. The spring is located between the cap and the pin. The clutch screw is threadedly connected to the upper part of the clutch rocker arm. One end of the horizontal clutch crank is inserted into a hole in the lower connecting pin plate and hinged to each other. The clutch crank is a zigzag crank. Between the two lower connecting pin plates, this end of the clutch crank is fixed with two plates with pin holes and openings. The lower part of the clutch rocker arm passes through the gap between the two plates and is hinged with a pin; the other end of the clutch crank is fitted into two parallel clutch plates and is positioned by a snap ring; the clutch plate is a perforated flat plate with a bushing at the upper end; the clutch crank passes through the bushings of the two clutch plates; the throttle lever and the engine clutch lever are respectively fitted into the holes in the flat plate and are fitted with hinge pins; the clutch crank has a clutch fan plate in the middle, and the clutch fan plate has several holes, one of which is hinged to one end of a connecting rod, and the other end of the connecting rod is hinged to the gearbox clutch.

[0022] Furthermore, an upper cover is provided above the end of the side panel, and the upper cover is bolted to the side panel; a wind deflector is provided at the lower end of the upper cover, and the wind deflector is hinged to the edge of the upper cover by a pin; a wind deflector adjustment plate is fixed at one end of the upper cover, and a wind deflector seat plate is welded to the edge of the upper cover in several sections. The wind deflector pins are sequentially inserted into the hinge hole in the middle of the wind deflector adjustment plate and the hinge hole in the wind deflector seat plate, and the two ends are positioned by snap rings to achieve hinged assembly; several right-angle connecting plates are provided, one end of the right-angle connecting plate is hinged to the connecting lug of the wind deflector, and the wind deflector pins are inserted into the other end of the right-angle connecting plate and fixed with set screws; the wind deflector pin is an L-shaped shaft with a hole on its short side, and the wind deflector locking shaft is a shaft with a boss in the middle. One end of the wind deflector locking shaft is provided with a threaded rod, and the wind deflector locking shaft is fitted with a spring and then passed through the hole on the short side of the wind deflector pin and locked with a nut.

[0023] Furthermore, the grain collecting auger, lifting auger, and lifting support can be replaced with a conveyor belt device. At the grain collecting port of the main vehicle, a horizontal conveyor belt is fitted on this side of the grain collecting box. The horizontal conveyor belt is driven by the main vehicle through chain drive. An input sprocket and a transition double tower pulley are added to the end of the horizontal conveyor belt. At the same time, a lifting conveyor belt is added to the shaft of the transition double tower pulley. The sprocket at the power input end of the lifting conveyor belt is connected to one of the sprockets of the transition double tower pulley by a chain. The other sprocket of the transition double tower pulley is connected to the input sprocket by a chain drive. The input sprocket is driven by the sprocket of the coaxial horizontal conveyor belt. At the same time, a hydraulic cylinder is hinged at the rear end of the main vehicle cab. The other end of the hydraulic cylinder is hinged to the lifting conveyor belt. The hydraulic cylinder is connected to the hydraulic oil circuit of the main vehicle. A control handle is provided in the main vehicle.

[0024] The beneficial effects of this utility model are as follows: This utility model can convey peeled corn cobs to the corn thresher via a conveying mechanism, realizing the function of a direct corn harvester. It allows the original corn harvester to have a freely selectable function, which can be used alone for harvesting corn cobs or for harvesting and threshing corn cobs, thus maximizing the functionality of the corn harvester. The grain collection bin can collect corn cobs or corn kernels separately. In the event of an unavoidable natural disaster, directly harvesting immature corn will affect the quality of the corn and reduce income. If the original function of the device is used to peel and dry the corn before threshing, this risk can be effectively reduced, income can be increased, and the device can better meet the needs of the operation. This device enables the corn harvester, which is on the verge of being phased out, to achieve the dual harvesting function of harvesting corn cobs and corn kernels. The collected corn cobs can be used as energy for power generation, and the collected broken kernels can be used as livestock feed. This device has the characteristics of low manufacturing cost and convenient installation. Attached Figure Description

[0025] Figure 1 This is a three-dimensional schematic diagram of the present invention.

[0026] Figure 2 This is a three-dimensional schematic diagram of the present invention.

[0027] Figure 3 This is a schematic diagram of the main vehicle structure.

[0028] Figure 4 This is a three-dimensional schematic diagram of the grain collection unit.

[0029] Figure 5 This is a three-dimensional schematic diagram of the grain collection unit.

[0030] Figure 6 This is a three-dimensional schematic diagram of the threshing unit.

[0031] Figure 7 This is a schematic diagram of one side of the threshing unit.

[0032] Figure 8 This is a magnified schematic diagram of a partial section of the threshing roller.

[0033] Figure 9 This is a three-dimensional schematic diagram showing the connection between the sieve plate fan and the threshing unit.

[0034] Figure 10 3D schematic diagram of a sieve plate fan.

[0035] Figure 11 This is a three-dimensional schematic diagram of the sieve assembly.

[0036] Figure 12 This is a three-dimensional schematic diagram of the reverse side of the sieve assembly.

[0037] Figure 13 This is a three-dimensional schematic diagram of the remaining unit.

[0038] Figure 14 This is a 3D schematic diagram of a grain bin.

[0039] Figure 15 This is a three-dimensional schematic diagram of a bran bin.

[0040] Figure 16 This is a three-dimensional schematic diagram of the grain collection unit and the threshing unit.

[0041] Figure 17 This is a three-dimensional schematic diagram of the grain collection unit.

[0042] Figure 18 This is an enlarged schematic diagram of the power transmission route for the grain collection unit.

[0043] Figure 19 This is a three-dimensional schematic diagram of a grain lifting auger.

[0044] Figure 20 This is a schematic diagram of a partial structure of the blower.

[0045] Figure 21 This is a three-dimensional schematic diagram of the power unit.

[0046] Figure 22 This is a schematic diagram of the clutch mechanism.

[0047] Figure 23 This is a schematic diagram of the upper cover structure.

[0048] Figure 24 This is a 3D schematic diagram of a conveyor belt.

[0049] Figure 25 This is a three-dimensional schematic diagram of a sprocket.

[0050] Figure 26 This is a schematic diagram of the meshing of the driving gear and the driven gear.

[0051] Numbered in the diagram: 1. Main vehicle; 101. Grain collection port; 102. Slider; 103. Tie rod; 104. Grain collection box shaft; 105. Shaft lug I; 106. Connecting pin plate; 2. Grain collection unit; 201. Grain collection auger; 202. Lifting auger; 203. Lifting bracket; 2031. Hinge connecting plate; 204. Sliding sleeve; 3. Threshing unit; 301. Grain feeding auger; 302. Threshing auger; 3011. Grain feeding roller; 3012. Shaft lug II; 3013. Support; 3014. Flat fork; 3015. Adjusting screw; 3021. Arc cover plate; 3 022. Adjustable sieve plate; 3023. Long filament adjustment seat; 3024. Long adjustment screw; 3025. Residue discharge port; 4. Sieve plate fan unit; 401. Fan; 402. Sieve frame assembly; 403. Assembly sieve; 5. Residue removal unit; 501. Grain bin; 5011. Flip door; 5012. Locking lug; 5013. Pressure spring; 5014. Upper handle; 5015. Lower handle; 5016. Long locking rod; 502. Bran bin; 5021. Lower flip plate; 5022. Counterweight; 5023. Limiting screw; 5024. Hollow plate; 6. Grain collection unit. 601. Particle receiving box; 602. Particle lifting auger; 6021. Particle receiving plate; 6022. Connecting fork; 6023. Particle lifting lock lug; 6024. Sliding fork; 603. Blower; 6031. Adjusting air vane; 6032. Lock hole plate; 6033. Long pin; 6034. Pin; 6035. Nut; 7. Touch signal device; 8. Power unit; 801. Engine; 802. Gearbox; 803. Battery; 804. Fuel tank; 9. Clutch device; 901. Clutch screw; 902. Clutch lever; 903. Clutch crank; 90 4. Clutch plate; 905. Clutch fan plate; 10. Top cover; 1001. Wind deflector; 1002. Wind deflector adjustment plate; 1003. Wind deflector pin; 1004. Wind deflector lock shaft; 1005. Wind deflector seat plate; 1006. Direct connection plate; 1101. Input sprocket; 1102. Double tower wheel; 1103. Lifting conveyor belt; 111. Connecting plate; 112. Coupling; 113. Bevel gear box; 114. Hydraulic cylinder; 115. Sprocket assembly; 116. Bearing seat; 117. Driven wheel; 118. Enclosure frame; 119. Side upright plate; 120. Drive wheel. Detailed Implementation

[0052] like Figure 1As shown in Figure 26, a corn harvester equipped with a backpack-type free threshing device includes a main carriage 1, a grain collection unit 2, a threshing unit 3, a screen plate fan unit 4, a residue cleaning unit 5, a grain collection unit 6, a power unit 8, and a clutch device 9. The main carriage 1 is a traditional corn cob picker and threshing machine. A grain collection box in the shape of an inverted trapezoid is installed on the corn cob picker and threshing machine, and the grain collection unit 2 is installed in the grain collection box. At the rear of the grain collection box, a retaining frame 118 is fixed on the main carriage 1. The bottom of the retaining frame 118 is connected to the rear of the main carriage 1 by a connecting plate 111 with bolts inserted. Side uprights 119 are fixed on both sides of the retaining frame 118. The side uprights 119 protrude... Above the enclosure frame 118; the threshing unit 3, the screen fan unit 4, the residue cleaning unit 5, the grain collecting unit 6, and the power unit 8 are all installed on the enclosure frame 118; the threshing unit 3 is installed on the enclosure frame 118 behind the grain collecting unit 2; the screen fan unit 4 is installed on the enclosure frame 118 on one side of the threshing unit 3; the residue cleaning unit 5 is installed on the enclosure frame 118 below the screen fan unit 4; the grain collecting unit 6 is installed on the enclosure frame 118 below the threshing unit 3; the power unit 8 and the clutch device 9 are installed at the lower position on one side of the enclosure frame 118, with the clutch device 9 arranged adjacent to the power unit 8.

[0053] The main vehicle 1 has a grain collection port 101 on its grain collection box. On both sides of the grain collection port 101, two sliders 102 are fixed on the grain collection box. A tie rod 103 is welded to the middle of the rear end of the grain collection box. Two annular lugs I 105 are welded to the unloading end of the grain collection box. A transverse pressure plate is provided on the outside of the lugs I 105. The grain collection box shaft 104 is hinged and inserted at the two inclined beams at the unloading end of the grain collection box. The grain collection box shaft 104 is also inserted inside the lugs I 105. The grain collection box shaft 104 and the lugs I 105 are fixed with set screws. Two connecting pins 106 are also welded to the inclined beams at the unloading end of the grain collection box.

[0054] The grain collecting unit 2 includes a grain collecting auger 201, a lifting auger 202, and a lifting support 203. The grain collecting auger 201 has a semi-circular outer shell and a spiral roller installed inside. Bearing seats 116 are installed at both ends of the grain collecting auger 201. Below the bearing seats 116, a connecting shaft is provided on the outer shell of the grain collecting auger 201. Sliding sleeves 204 are hinged to the connecting shaft by cotter pins. The two sliding sleeves 204 are located inside the two sliders 102. The grain inlet end of the grain collecting auger 201 matches the grain collecting port 101. An inclined cylindrical lifting auger 202 is installed at the grain outlet end of the grain collecting auger 201. The grain end is connected to the lifting auger 202, and a spiral roller is installed inside the lifting auger 202. The grain outlet end of the lifting auger 202 has two spaced sprockets. The power input shaft of the grain collecting auger 201 is installed on the outer wall of the lifting auger 202 through the support lugs. A sprocket is installed on the upper end of the power input shaft of the grain collecting auger 201. The sprocket on the power input shaft is connected to the lower sprocket on the lifting auger 202 through a chain to form a sprocket group 115. The lower end of the power input shaft of the grain collecting auger 201 is connected to a bevel gear box 113 through a coupling 112. The power output end of the bevel gear box 113 is connected to the grain collecting spiral roller shaft of the grain collecting auger 201.

[0055] A lifting bracket 203 is hinged below the grain outlet end of the lifting auger 202. The lifting bracket 203 consists of two parallel plates. A grain receiving box assembly is welded to the upper end of the plates. The two plates are welded to the back plate at the rear of the grain collecting box. The upper part of the box is completely open, and the bottom is semi-open. A hinged connecting plate 2031 is provided inside the box. One end of the hinged connecting plate 2031 is hinged to the grain outlet end of the lifting auger 202. A connecting plate is welded to the side wall of the box, and a conical tooth box 113 and a protective device are installed on the connecting plate. The bevel gearbox 113 at the square box is equipped with a driven gear 117 at its input end and a sprocket at its output end. The sprocket is connected to the upper sprocket on the lifting auger 202 via a chain to form a sprocket assembly 115. The grain outlet end of the lifting auger 202 is located at the top of the square box. A hydraulic cylinder 114 is installed between the lifting support 203 and the lifting auger 202. The hydraulic cylinder 114 is connected to an oil circuit, and the piston end of the hydraulic cylinder 114 is hinged to the bottom of the lifting auger 202.

[0056] The threshing unit 3 includes a grain feeding auger 301 and a threshing auger 302. Above the enclosure frame 118, the grain feeding auger 301 and the threshing auger 302 are arranged adjacent to each other. One end of the grain feeding auger 301 is installed on the side upright plate 119, and the other end of the grain feeding auger 301 is installed on the support plate of the enclosure frame 118. The grain feeding auger 301 has a semi-open structure. The upper part of the open end of the grain feeding auger 301 is the grain outlet end of the box above the lifting bracket 203. The bottom of the grain outlet end of the grain feeding auger 301 is connected to the bottom of the grain inlet end of the threshing auger 302.

[0057] Both the grain feeding auger 301 and the threshing auger 302 have bearing seats 116 installed at their shaft ends. On the outside of one side of the bearing seat 116, both the grain feeding auger 301 and the threshing auger 302 have a pulley installed at their shaft ends. The grain feeding auger 301 and the threshing auger 302 are powered by a belt.

[0058] The grain feeding auger 301 has a grain feeding roller 3011 in the middle. At the end of the grain feeding roller 3011 away from the pulley, a set of double sprockets is installed at the shaft head of the grain feeding roller 3011. At the end of the grain feeding auger 301 away from the pulley, there is also a shaft lug II 3012 and a support 3013. One end of a flat fork 3014 is hinged to the shaft lug II 3012. The flat fork 3014 is positioned by a snap ring after being assembled into the shaft lug II 3012. The flat fork 3014 is a combination of two arc-shaped plates. A short shaft is provided in the middle of the two plates. The two sides of the flat plate combination are respectively The fork 3014 has a coaxial through hole. On the other side of the shaft, the drive wheel 120 and the sprocket are mounted. The drive wheel 120 is meshed with the driven gear 117. The sprocket on the inner side of the double sprocket on the feed roller 3011 shaft is connected to the sprocket on the shaft of the fork 3014 through a transmission chain to form a sprocket group 115. The lower part of the fork 3014 is a support 3013. After the adjusting screw 3015 is screwed into the threaded hole on the short shaft in the middle of the fork 3014, it rests on the support 3013. Rotating the adjusting screw 3015 can adjust the position of the drive wheel 120.

[0059] The threshing auger 302 includes an arc-shaped cover plate 3021, an adjustable sieve plate 3022, a filament adjustment seat 3023, a long adjustment filament 3024, and a discharge port 3025. The outer ring of the threshing auger 302 is a sieve-shaped cylinder. The internal shaft of the threshing auger 302 is a roller with guide vanes and spirally arranged kneading blocks. The outer ring of the threshing auger 302 is bolted to the two side upright plates 119. The two ends of the internal shaft are connected to bearing seats 116 and then bolted to the two side upright plates 119. The outer ring surface of the threshing auger 302 is provided with an inspection window, a filament adjustment seat 3023, and a discharge port. The inspection window 3025 is covered by an arc-shaped cover plate 3021, which is fixed to the inspection window by bolts. Several adjustable screen plates 3022 are hinged to the inner side of the outer ring of the threshing auger 302. The long adjusting screw 3024 is a long screw. After the long adjusting screw 3024 is screwed into the long screw adjusting seat 3023, it is hinged to the movable side of the adjustable screen plate 3022. At the end of the long adjusting screw 3024, a row of openings 3025 is provided at the bottom of the cylinder. The end of the grain feeding auger 301 away from the pulley is equipped with a touch signal device 7, which is in contact with the driven gear 117.

[0060] The screen plate blower unit 4 includes a blower 401, a screen frame assembly 402, and a screen assembly 403. Several support blocks are fixed on the enclosure frame 118. The blower 401 is installed between the side upright plate 119 and the support blocks, and a pulley is installed at one end of the blower 401 shaft. The screen assembly 403 is a three-stage screen and a single-plate structure. From top to bottom, the first screen is a serrated fine flat screen, the second screen is a fine frame screen with a trough for loose impurities and an inclined angle that rises towards the first screen at the trough, and the third screen is a coarse frame screen. The plate is a grain receiving plate with a frame located at the bottom of the three screens, broken into two sections in the middle and inclined downwards. The third screen has a grain outlet facing the main vehicle end. The three screens and the single-plate are connected as one unit by bolts. The components are assembled into a screen group 403, which is located on one side of the blower 401 and installed on the enclosure frame 118. The screen frame group 402 consists of a straight shaft installed on the support block of the enclosure frame 118. A sprocket is installed in the middle of the straight shaft, and eccentric guide wheels are installed at both ends of the straight shaft. The guide wheels are hinged to rockers, and the other end of the rockers is hinged to a U-shaped frame. The outer sides of both ends of the U-shaped frame are provided with shafts, and rollers are installed on the shafts. The lower part of the rollers is provided with a slide rail made of angle iron. The angle iron is installed on two longitudinal beams inside the enclosure frame 118 by bolts. The U-shaped frame is connected to the screen group 403 by bolts. The screen group is located on the upper part of the U-shaped frame. The upper part of the rollers is bolted with an anti-jump plate to prevent the rollers from falling off the slide rail.

[0061] The waste removal unit 5 includes a grain box 501 and a bran box 502. The grain box 501 is fixed to one side inside the enclosure frame 118, and the bran box 502 is fixed to the other side inside the enclosure frame 118. The grain box 501 is an inverted triangular box with two hanging ears on the top. Bolts pass through the hanging ears to install the grain box 501 on the enclosure frame 118, and it is also hung below the screen group 403.

[0062] The grain box 501 has an open bottom and a hinged flip door 5011, which is connected by a pin. The side wall of the grain box 501 has a locking structure. The upper handle 5014 and the lower handle 5015 of the locking structure are hinged to a through shaft that runs through the inside of the grain box 501. The upper handle 5014 and the lower handle 5015 each have a groove inside, and a pressure spring 5013 is installed in the groove. The pressure spring 5013 has a pin in the middle, which passes through the hole of the lock lug 5012 welded to the side wall of the grain box 501. The upper part of the upper handle 5014 has a protruding hanging arm. A pin with a central through hole is installed at the hanging arm by a retaining spring. The long locking rod 5016 passes through the through hole of the pin and is then pressed into the spring and tightened into a nut to assemble the whole. The lower part of the long locking rod 5016 has a hole to hook onto the hanging pin protruding from the side of the flip door 5011.

[0063] A lower flap 5021 is provided below the bran box 502. The lower flap 5021 is hinged to the bottom of the enclosure frame 118 by a pin. A counterweight 5022 is welded to the bottom of the lower flap 5021. The counterweight part of the counterweight 5022 passes the hinge point and is located outside the lower flap 5021. A limiting screw 5023 is installed at the lug welded on the enclosure frame 118. The limiting screw 5023 is located above the counterweight 5022. At the parallel position of the limiting screw 5023, a touch signal device 7 is bolted to the enclosure frame 118. The touch signal device 7 is electrically connected to the main vehicle 1. A signal alarm is installed in the main vehicle 1. A perforated plate 5024 is welded to the end of the enclosure frame 118 away from the power unit 8. The perforated plate 5024 forms the frame of the bran box 502.

[0064] The grain collection unit 6 includes a grain collection box 601, a grain lifting auger 602, and a blower 603. The grain collection box 601 is an inverted trapezoidal box with an open top. The grain collection box 601 is located below the grain outlet of the third screen of the group screen 403. The upper part of the grain collection box 601 is provided with a hanging ear. Bolts pass through the hanging ear to connect the grain collection box 601 to the enclosure frame 118. The grain collection box 601 has two openings, one at the top and one at the bottom. The grain lifting auger 602 is installed on the side wall of the grain collection box 601 and communicates with the lower opening of the grain collection box 601.

[0065] The two ends of the grain lifting auger 602 are connected by threaded bearing seats 116. The upper bearing seat 116 is connected to a bevel gear box 113. The bevel gear box 113 is bolted to the support block of the enclosure frame 118. Two sprockets are installed on the input shaft of the bevel gear box 113. The inner sprocket on the input shaft of the bevel gear box 113 is connected to the outer sprocket of the double sprocket on the shaft head of the grain feeding roller 3011 through a transmission chain. The outer sprocket on the input shaft of the bevel gear box 113 is connected to the sprocket on the optical shaft through a transmission chain.

[0066] The grain-raising auger 602 is equipped with a grain receiving plate 6021, a connecting fork 6022, a grain-raising locking lug 6023, and a sliding fork 6024. The grain receiving plate 6021 is hinged to the grain outlet at the upper end of the grain-raising auger 602. The connecting fork 6022 is hinged to the grain receiving plate 6021. The connecting fork 6022 is a U-shaped fork with a folded edge. A long threaded rod is provided at the closed edge of the connecting fork 6022. After the spring passes through the threaded rod of the connecting fork 6022, it passes integrally through the through hole in the grain-raising locking lug 6023 welded to the outer wall of the grain-raising auger 602. The sliding fork 6024 is fixed in the bottom hole of the threaded rod of the connecting fork 6022. The sliding fork 6024 abuts against the bottom of the pull rod 103.

[0067] The blower 603 is bolted to the side plate 119 on one side of the bran bin 502. The air inlet of the blower 603 is connected to the grain collection bin 601. A pulley is installed at the power input end of the blower 603. The pulley and the pulley at the power output end of the threshing auger 302 are connected by a belt to transmit power. An adjusting air plate 6031 is provided at the air outlet end of the blower 603. The adjusting air plate 6031 is hinged to the air outlet end face of the blower 603 by an L-shaped long pin 6033. The adjusting air plate 6031 and the long pin 6033 are integrated. A locking plate 6032 is fixed to the side wall of the air outlet of the blower 603. The pin 6034 is a pin with a stepped platform in the middle and a thread at one end. The spring is put on the stepped platform of the pin 6034. Then, the threaded end of the pin 6034 is passed through the hole on the short side of the long pin 6033 and the screw cap 6035 is tightened to assemble it into a whole.

[0068] The power unit 8 includes an engine 801, a gearbox 802, a battery 803, and a fuel tank 804. The engine 801 is mounted on a support plate on the side of the enclosure frame 118 near the grain bin 501. The fuel tank 804 is arranged adjacent to the engine 801. The engine 801 is equipped with a chimney. Above the engine 801, a gearbox 802 is mounted on the enclosure frame 118. The input end of the gearbox 802 is connected to the drive end of the engine 801 via a belt. Above the fuel tank 804, a battery 803 is mounted on the enclosure frame 118. The battery 803 is arranged adjacent to the gearbox 802 and is electrically connected to the engine 801. The output end of the gearbox 802 is connected to the pulley at the end of the threshing auger 302 via a belt.

[0069] The clutch device 9 includes a clutch screw 901, a clutch rocker arm 902, a clutch crank 903, a clutch plate 904, and a clutch fan plate 905. The clutch screw 901 is a threaded rod with a cap. After the clutch screw 901 is fitted with a spring, it is inserted into the hinged pin hole inside the upper connecting pin plate 106. The spring is located between the cap and the pin. The clutch screw 901 is threadedly connected to the upper part of the clutch rocker arm 902. One end of the horizontal clutch crank 903 is inserted into the hole of the lower connecting pin plate 106 and hinged to each other. The clutch crank 903 is a zigzag crank. Between the two lower connecting pin plates 106, two plates with pin holes and openings are fixed to this end of the clutch crank 903. The lower part of 902 passes through the gap between the two plates and is hinged with a pin; the engine 801 is provided with two clutch plates 904, and the other end of the clutch crank 903 is fitted into the two clutch plates 904 arranged in parallel and is positioned by a snap ring; the clutch plate 904 is a flat plate with holes, and the upper end of the flat plate is provided with a bushing. The clutch crank 903 passes through the bushings of the two clutch plates 904. The throttle rod and the engine clutch lever are respectively fitted into the holes at the flat plate of the clutch plate 904 and are inserted with hinge pins; the clutch crank 903 is provided with a clutch sector plate 905 in the middle, and the clutch sector plate 905 is provided with several holes. One end of the connecting rod is hinged in one of the holes, and the other end of the connecting rod is hinged to the clutch of the gearbox 802.

[0070] A top cover 10 is provided above the end of the side panel 119, and the top cover 10 is bolted to the side panel 119; a wind deflector 1001 is provided at the lower end of the top cover 10, and the wind deflector 1001 is hinged to the edge of the top cover 10 by a pin; a wind deflector adjustment plate 1002 is fixed to one end of the top cover 10, and a wind deflector base plate 1005 is welded to the edge of the top cover 10 in several sections; a wind deflector pin 1003 is inserted sequentially into the middle hinge hole of the wind deflector adjustment plate 1002 and the hinge hole of the wind deflector base plate 1005, and the two ends are fixed by retaining springs. The assembly is now hinged; several right-angle connecting plates 1006 are provided, one end of which is hinged to the connecting lug of the wind deflector 1001. The wind deflector pin 1003 is inserted into the other end of the right-angle connecting plate 1006 and fixed with a set screw. The wind deflector pin 1003 is an L-shaped shaft with a hole on its short side. The wind deflector lock shaft 1004 is a shaft with a boss in the middle. One end of the wind deflector lock shaft 1004 is provided with a threaded rod. After the wind deflector lock shaft 1004 is fitted with a spring, it passes through the hole on the short side of the wind deflector pin 1003 and is locked with a nut.

[0071] Depending on the vehicle model, the grain collecting auger 201, lifting auger 202, and lifting bracket 203 can be replaced with a conveyor belt device. At the grain collecting port 101 of the main vehicle 1, a horizontal conveyor belt is added to this side of the grain collecting box. The horizontal conveyor belt is driven by the main vehicle 1 through chain drive. An input sprocket 1101 and a transition double tower pulley 1102 are added to the end of the horizontal conveyor belt. At the same time, a lifting conveyor belt 1103 is added to the shaft of the transition double tower pulley 1102. The sprocket at the power input end of the lifting conveyor belt 1103 is connected to one of the sprockets of the transition double tower pulley 1102 by a chain. The other sprocket of the transition double tower pulley 1102 is connected to the input sprocket 1101 by a chain drive. The input sprocket 1101 is driven by the sprocket of the coaxial horizontal conveyor belt. At the same time, a hydraulic cylinder is hinged at the rear end of the cab of the main vehicle 1. The other end of the hydraulic cylinder is hinged to the lifting conveyor belt 1103. The hydraulic cylinder is connected to the hydraulic oil circuit of the main vehicle 1. A control handle is provided in the main vehicle 1. This allows different vehicle models to select the appropriate conveyor belt device or grain collection unit 2.

[0072] During operation, the piston end of the hydraulic cylinder 114 extends, driving the grain collecting auger 201 and the lifting auger 202 to move upward. The sliding sleeve 204 rolls along the slider 102, and the semi-circular outer shell of the grain collecting auger 201 aligns with the grain collecting port 101. The hydraulic cylinder 114 stops operating, and the driving wheel 120 meshes with the driven gear 117, which is sensed by the touch signal device 7 to determine if they are in contact. The touch signal device 7 serves as an alarm. The drive end of the engine 801 drives the pulley on the gearbox 802 to rotate via a belt. The pulley on the gearbox 802 then drives the threshing auger 302 to rotate via a belt. The threshing auger 302 drives the grain feeding auger 301 to rotate via belt drive. The grain feeding auger 301 drives the fan blade shaft in the blower 401 via belt drive between pulleys. The fan blades rotate, and simultaneously, on the side of the flat fork 3014, the inner sprocket on the grain feeding auger 301 drives the drive wheel 120 to rotate through the chain drive between the sprocket groups 115. The drive wheel 120 drives the driven gear 117 to rotate through meshing with the driven gear 117. During the rotation, the driven gear 117 drives the sprocket on the bevel gear box 113 to rotate through the bevel gear box 113. Inside the bevel gear box 113 are two bevel gears that mesh at 90 degrees and are installed in the gearbox. The sprocket on the bevel gear box 113 drives the spiral roller in the lifting auger 202 to rotate through the chain drive. The lower sprocket on the lifting auger 202 drives the power input shaft to rotate through the chain drive. The power input shaft then drives the spiral roller in the grain collecting auger 201 to rotate through another bevel gear box 113.

[0073] The outer sprocket on the side of the flat fork 301 of the grain feeding auger 301 drives the inner sprocket on the conical gear box 113 of the grain lifting auger 602 to rotate via chain drive. This sprocket drives the spiral roller inside the grain lifting auger 602 to rotate via the conical gear box 113. The outer sprocket on the top conical gear box 113 of the grain lifting auger 602 drives the optical shaft to rotate via chain drive. The optical shaft drives the eccentric guide wheels at both ends to rotate. The eccentric guide wheels drive the rocker arms on their respective sides to pull the U-shaped frame and the screen group 403 on the U-shaped frame to reciprocate under the action of the rollers on both sides, thereby screening the corn kernels.

[0074] The main vehicle 1 harvests the corn cobs, then peels them using its own peeling rollers. The peeled corn cobs then enter the grain collecting auger 201 through the grain collecting inlet 101. The grain collecting auger 201 then transports the corn cobs to the lifting auger 202, which in turn transports them through a square box to the feeding auger 301. The feeding auger 301 then transports the corn cobs to the threshing auger 302, where a roller with guide blades and spirally arranged kneading blocks threshes the corn cobs. The threshed kernels fall into the group screen 403. After three layers of screening, the intact corn kernels exit through the third screen of group screen 403. The corn kernels fall into the collection box 601. Rotating the nut 6035 drives the long pin 6033 and the adjusting vane 6031, inserting the pin 6034 into the hole on the locking plate 6032 to adjust the airflow of the blower 603. With the assistance of the blower 603, the blower 603 blows out the dust from the corn kernels. The lifting auger 602 then transports the corn kernels from the collection box 601 to the top. The corn kernels are then discharged from the outlet of the lifting auger 602 and fall into the grain collection box via the receiving plate 6021. The weight of the corn kernels presses down on the receiving plate 6021, compressing the spring. After the grain delivery is complete, the spring will reset the receiving plate 6021.

[0075] Corn kernels fall into the grain collection bin for collection, so that the grain collection bin can collect both corn cobs and corn kernels; the corn cobs after threshing are conveyed by the threshing auger 302 to the discharge port 3025 and fall into the bran bin 502. The counterweight 5022 is used to balance the internal weight of the bran bin 502. When the weight of the corn cobs after threshing in the bran bin 502 is too heavy, the touch signal 7 will be triggered, and the lower flap 5021 will open to release the corn cobs after threshing. The limit screw 5023 limits the folding angle of the lower flap 5021.

[0076] Just as the corn kernels are about to enter the sieve 403, the blower 401 blows air in the direction of the sieve 403. The lighter broken corn kernels will be blown away by the air and enter the grain bin 501, while the whole corn kernels will enter the grain collection bin 601 through the sieve 403. After the grain bin 501 is full, the lower part of the long locking rod 5016 disengages from the hook protruding from the side of the flip door 5011, and the flip door 5011 can be opened to release the broken corn kernels in the grain bin 501.

[0077] The windshield lock shaft 1004 is inserted into the hole on the windshield adjustment plate 1002 to adjust the windshield angle of the windshield plate 1001 through the windshield pin 1003 and the right-angle connecting plate 1006; the adjusting screw 3015 on the horizontal fork 3014 is used to adjust the meshing degree between the drive wheel 120 and the driven gear 117.

[0078] Engine 801 provides power to the entire device. When the grain collection box shaft 104 drives the lug I 105 to rotate, the lug I 105 presses down the clutch screw 901 and positions it. The clutch screw 901 drives the clutch rocker 902 to move, and the clutch rocker 902 drives the clutch crank 903 to rotate, producing a large adjustment. The rotation of the clutch crank 903 causes the throttle lever to move, reducing the throttle, so that the grain collection box can discharge grain without the need for high throttle operation. When the lug I 105 is lifted, the clutch screw 901 automatically lifts, and the throttle is increased again, returning to the working state. If the main vehicle 1 has sufficient power, the power of the main vehicle 1 can be used to drive the threshing device, which reduces the vehicle weight and lowers the economic cost.

Claims

1. A corn harvester equipped with a backpack-type free threshing device, characterized in that: The system includes a main vehicle (1), a grain collection unit (2), a threshing unit (3), a screen fan unit (4), a residue cleaning unit (5), a grain collection unit (6), a power unit (8), and a clutch device (9). The main vehicle (1) is the original corn ear-picking and threshing machine. A grain collection box in the shape of an inverted trapezoid is installed on the corn ear-picking and threshing machine. The grain collection unit (2) is installed in the grain collection box. At the rear of the grain collection box, a retaining frame (118) is fixed on the main vehicle (1). The bottom of the retaining frame (118) is connected to the rear of the main vehicle (1) by a connecting plate (111) with bolts inserted. Side uprights (119) are fixed on both sides of the retaining frame (118). The side uprights (119) protrude above the retaining frame (118). The threshing unit (3) The screen fan unit (4), the residue cleaning unit (5), the grain collecting unit (6), and the power unit (8) are all installed on the enclosure frame (118); the threshing unit (3) is installed on the enclosure frame (118) behind the grain collecting unit (2); the screen fan unit (4) is installed on the enclosure frame (118) on one side of the threshing unit (3); the residue cleaning unit (5) is installed on the enclosure frame (118) below the screen fan unit (4); the grain collecting unit (6) is installed on the enclosure frame (118) below the threshing unit (3); the power unit (8) and the clutch device (9) are installed on the lower side of the enclosure frame (118), and the clutch device (9) is arranged adjacent to the power unit (8).

2. A corn harvester equipped with a backpack-type free threshing device according to claim 1, characterized in that: The main vehicle (1) has a grain collection port (101) on its grain collection box. On both sides of the grain collection port (101), two sliders (102) are fixed on the grain collection box. A pull rod (103) is welded to the middle of the rear end of the grain collection box. Two circular axle lugs I (105) are welded to the unloading end of the grain collection box. A horizontal pressure plate is provided outside the axle lugs I (105). The grain collection box shaft (104) is hinged and inserted at the two inclined beams at the unloading end of the grain collection box. The grain collection box shaft (104) is also inserted inside the axle lugs I (105). The grain collection box shaft (104) and the axle lugs I (105) are fixed with set screws. Two connecting pins (106) are also fixed at the inclined beams at the unloading end of the grain collection box.

3. A corn harvester equipped with a backpack-type free threshing device according to claim 1, characterized in that: The grain collection unit (2) includes a grain collection auger (201), a lifting auger (202), and a lifting support (203). The outer shell of the grain collection auger (201) is a semi-circular shell, and a spiral roller is installed inside. Bearing seats (116) are installed at both ends of the grain collection auger (201). Below the bearing seats (116), a connecting shaft is provided on the shell of the grain collection auger (201). A sliding sleeve (204) is hinged to the connecting shaft by a cotter pin. The two sliding sleeves (204) are located inside the two sliders (102). The grain inlet end of the grain collection auger (201) matches the grain collection port (101). An inclined cylindrical lifting auger (202) is installed at the grain outlet end of the grain collection auger (201). 01) The grain outlet end is connected to the lifting auger (202), and a spiral roller is installed inside the lifting auger (202); the grain outlet end of the lifting auger (202) is provided with two spaced sprockets, and the power input shaft of the grain collecting auger (201) is installed on the outer wall of the lifting auger (202) through the support ears. A sprocket is installed at the upper end of the power input shaft of the grain collecting auger (201), and the sprocket on the power input shaft is connected to the lower sprocket on the lifting auger (202) through a chain to form a sprocket group (115); the lower end of the power input shaft of the grain collecting auger (201) is connected to a bevel gear box (113) through a coupling (112), and the power output end of the bevel gear box (113) is connected to the grain collecting spiral roller shaft of the grain collecting auger (201); A lifting bracket (203) is hinged below the grain outlet end of the lifting auger (202). The lifting bracket (203) consists of two parallel plates. A grain receiving box assembly is welded to the upper end of the plates. The two plates are welded to the back plate at the rear of the grain collection box. The upper part of the box is completely open, and the bottom is semi-open. A hinged connecting plate (2031) is provided inside the box. One end of the hinged connecting plate (2031) is hinged to the grain outlet end of the lifting auger (202). A connecting plate is welded to the side wall of the box, and a conical tooth box (113) and a protective cover are installed on the connecting plate. The conical tooth box at the box... (113) The input end adopts a flat key snap ring structure to install a driven gear (117), and the output end of the bevel gear box (113) is equipped with a sprocket. The sprocket is connected to the upper sprocket on the lifting auger (202) by a chain to form a sprocket group (115). The grain outlet end of the lifting auger (202) is located on the upper part of the square box. A hydraulic cylinder (114) is installed between the lifting bracket (203) and the lifting auger (202). The hydraulic cylinder (114) is connected to the oil circuit. The piston end of the hydraulic cylinder (114) is hinged to the bottom of the lifting auger (202).

4. A corn harvester equipped with a backpack-type free threshing device according to claim 1, characterized in that: The threshing unit (3) includes a grain feeding auger (301) and a threshing auger (302). Above the enclosure frame (118), the grain feeding auger (301) and the threshing auger (302) are arranged adjacent to each other. One end of the grain feeding auger (301) is installed on the side plate (119), and the other end of the grain feeding auger (301) is installed on the support plate of the enclosure frame (118). The grain feeding auger (301) has a semi-open structure. The upper part of the open end of the grain feeding auger (301) is the grain outlet end of the box above the lifting bracket (203). The bottom of the grain outlet end of the grain feeding auger (301) is connected to the bottom of the grain inlet end of the threshing auger (302). Bearing seats (116) are installed at the shaft ends of both the grain feeding auger (301) and the threshing auger (302). On the outside of one side of the bearing seat (116), a pulley is installed at the shaft end of both the grain feeding auger (301) and the threshing auger (302). Power transmission between the grain feeding auger (301) and the threshing auger (302) is achieved through a belt. The grain feeding auger (301) has a grain feeding roller (3011) in the middle. At the end of the grain feeding roller (3011) away from the pulley, a set of double sprockets is installed at the shaft head of the grain feeding roller (3011). At the end of the grain feeding auger (301) away from the pulley, there is also a shaft lug II (3012) and a support (3013). One end of a flat fork (3014) is hinged to the shaft lug II (3012). The flat fork (3014) is positioned by a snap ring after being assembled into the shaft lug II (3012). The flat fork (3014) is a combination of two arc-shaped plates. A short shaft is provided in the middle of the two plates. The two sides of the flat plate combination are respectively provided with A coaxial through hole is provided. On the shaft on the other side of the flat fork (3014), a drive wheel (120) and a sprocket are mounted. The drive wheel (120) meshes with the driven gear (117). The sprocket on the inner side of the double sprocket on the feed roller (3011) shaft is connected to the sprocket on the shaft of the flat fork (3014) through a transmission chain to form a sprocket group (115). The lower part of the flat fork (3014) is a support (3013). After the adjusting screw (3015) is screwed into the threaded hole on the short shaft in the middle of the flat fork (3014), it presses against the support (3013). Rotating the adjusting screw (3015) can adjust the position of the drive wheel (120). The threshing auger (302) includes an arc-shaped cover plate (3021), an adjustable sieve plate (3022), a filament adjustment seat (3023), a long adjustment filament (3024), and a discharge port (3025). The outer ring of the threshing auger (302) is a sieve-shaped cylinder. The inner shaft of the threshing auger (302) is a shaft roller with guide vanes and spirally arranged kneading blocks. The outer ring of the threshing auger (302) is bolted to the two side uprights (119). The two ends of the inner shaft are connected to bearing seats (116) and then bolted to the two side uprights (119). The outer ring surface of the threshing auger (302) is provided with an inspection window, a filament adjustment seat (3023), and a discharge port. (3025) The inspection window is covered with an arc-shaped cover plate (3021). The arc-shaped cover plate (3021) is fixed to the inspection window by bolts. Several adjustable screen plates (3022) are hinged on the inner side of the outer ring of the threshing auger (302). The long adjusting wire (3024) is a long screw. After the long adjusting wire (3024) is screwed into the long wire adjusting seat (3023), it is hinged to the movable side of the adjustable screen plate (3022). At the end of the long adjusting wire (3024), a row of slots (3025) is provided at the bottom of the cylinder. The end of the grain feeding auger (301) away from the pulley is equipped with a touch signal device (7). The touch signal device (7) is in contact with the driven gear (117).

5. A corn harvester equipped with a backpack-type free threshing device according to claim 1, characterized in that: The screen plate blower unit (4) includes a blower (401), a screen frame assembly (402), and a screen assembly (403). Several support blocks are fixed on the enclosure frame (118). The blower (401) is installed between the side upright plate (119) and the support blocks. A pulley is installed at one end of the blower (401) shaft. The screen assembly (403) is a three-stage screen and a single-stage plate structure. From top to bottom, the first stage screen is a sawtooth fine flat screen, the second stage screen is a fine frame screen with a trough for loose impurities and an inclined angle that lifts towards the first stage screen at the trough, and the third stage screen is a coarse frame screen. The plate is a grain receiving plate with a frame located at the bottom of the three stages screen. It is broken into two sections in the middle and is inclined downwards. The third stage screen has a grain outlet facing the main vehicle end. The three stages screens and the single-stage plate are connected as one unit by bolts. The screen assembly (403) is located on one side of the blower (401) and installed on the enclosure frame (118). The screen frame assembly (402) is a straight shaft installed on the support block of the enclosure frame (118). A sprocket is installed in the middle of the straight shaft, and eccentric guide wheels are installed at both ends of the straight shaft. A rocker arm is hinged to the guide wheel, and the other end of the rocker arm is hinged to the U-shaped frame. A shaft is provided on the outer side of both ends of the U-shaped frame, and a roller is installed on the shaft. A slide rail made of angle iron is provided at the bottom of the roller. The angle iron is installed on two longitudinal beams inside the enclosure frame (118) by bolts. The U-shaped frame is connected to the screen assembly (403) by bolts. The screen assembly (403) is located on the upper part of the U-shaped frame. An anti-jump plate is installed on the upper part of the roller by bolts to prevent the roller from falling off the slide rail.

6. A corn harvester equipped with a backpack-type free threshing device according to claim 1, characterized in that: The waste removal unit (5) includes a grain box (501) and a bran box (502). The grain box (501) is fixed to one side inside the enclosure frame (118), and the bran box (502) is fixed to the other side inside the enclosure frame (118). The grain box (501) is an inverted triangular box with two hanging ears on the top. Bolts pass through the hanging ears to install the grain box (501) on the enclosure frame (118) and hang it below the sieve group (403). The grain box (501) has an open, hinged flip door (5011) at the bottom, and a locking structure on the side wall of the grain box (501). The upper handle (5014) and lower handle (5015) of the locking structure are hinged to a through shaft that runs through the interior of the grain box (501). The upper handle (5014) and lower handle (5015) are respectively provided with grooves, and a pressure spring (5013) is installed in the groove. A pin is provided in the middle, and the pin is inserted into the hole of the lock lug (5012) welded to the side wall of the grain box (501). The upper part of the upper handle (5014) has a protruding hanging arm. A pin with a middle through hole is installed at the hanging arm by a snap ring. The long locking rod (5016) passes through the through hole of the pin and is then pressed into the spring and tightened into the nut to assemble the whole. The lower part of the long locking rod (5016) has a hole to hang on the hanging pin protruding from the side of the flip door (5011). A lower flap (5021) is provided below the bran box (502). The lower flap (5021) is hinged to the bottom of the enclosure frame (118) by a pin. A counterweight (5022) is welded to the bottom of the lower flap (5021). The counterweight part of the counterweight (5022) extends beyond the hinge point and is located outside the lower flap (5021). A limiting screw (5023) is installed at the lug welded on the enclosure frame (118). 3) Located above the counterweight (5022), at the parallel position of the limit screw (5023), the enclosure frame (118) is bolted with a touch signal device (7), which is electrically connected to the main vehicle (1), and the main vehicle (1) is equipped with a signal alarm; the end of the enclosure frame (118) away from the power unit (8) is welded with a hollow plate (5024), which forms the frame of the bran box (502) enclosed by the hollow plate (5024).

7. A corn harvester equipped with a backpack-type free threshing device according to claim 1, characterized in that: The grain collection unit (6) includes a grain collection box (601), a grain lifting auger (602), and a blower (603). The grain collection box (601) is an inverted trapezoidal box with an open top. The grain collection box (601) is located below the grain outlet of the third screen of the group screen (403). The upper part of the grain collection box (601) is provided with a hanging ear. Bolts pass through the hanging ear to connect the grain collection box (601) to the enclosure frame (118). The grain collection box (601) has two openings, one at the top and one at the bottom. The grain lifting auger (602) is installed on the side wall of the grain collection box (601) and communicates with the lower opening of the grain collection box (601). The two shaft ends of the grain lifting auger (602) are connected by threaded bearing seats (116). The upper bearing seat (116) is connected to a bevel gear box (113). The bevel gear box (113) is bolted to the support block of the enclosure frame (118). Two sprockets are installed on the input shaft of the bevel gear box (113). The inner sprocket on the input shaft of the bevel gear box (113) is connected to the outer sprocket of the double sprocket on the shaft of the grain feeding roller (3011) through a transmission chain. The outer sprocket on the input shaft of the bevel gear box (113) is connected to the sprocket on the optical shaft through a transmission chain. The grain-raising auger (602) is equipped with a grain receiving plate (6021), a connecting fork (6022), a grain-raising lock lug (6023), and a sliding fork (6024). The grain receiving plate (6021) is hinged to the grain outlet at the upper end of the grain-raising auger (602). The connecting fork (6022) is hinged to the grain receiving plate (6021). The connecting fork (6022) is a U-shaped fork with a folded edge. A long threaded rod is provided at the closed edge of the connecting fork (6022). After the spring passes through the threaded rod of the connecting fork (6022), it passes through the through hole in the grain-raising lock lug (6023) welded to the outer wall of the grain-raising auger (6022). The sliding fork (6024) is fixed in the bottom hole of the threaded rod of the connecting fork (6022). The sliding fork (6024) rests against the bottom of the pull rod (103). The blower (603) is bolted to the side plate (119) on one side of the bran bin (502). The air inlet of the blower (603) is connected to the grain collection bin (601). A pulley is installed at the power input end of the blower (603), and the pulley is connected to the pulley at the power output end of the threshing auger (302) via a belt to transmit power. An adjusting air plate (6031) is provided at the air outlet end of the blower (603), and the adjusting air plate (6031) is connected to the L-shaped long pin (6033). The air adjustment plate (6031) and the long pin (6033) are hinged at the air outlet end face of the blower (603). The air adjustment plate (6031) and the long pin (6033) are integrated. The locking plate (6032) is fixed at the side wall of the air outlet of the blower (603). The pin (6034) is a pin with a stepped platform in the middle and a thread at one end. The spring is put on the stepped platform of the pin (6034). Then, the threaded end of the pin (6034) is passed through the hole on the short side of the long pin (6033) and the screw cap (6035) is tightened to assemble it into one piece.

8. A corn harvester equipped with a backpack-type free threshing device according to claim 1, characterized in that: The power unit (8) includes an engine (801), a gearbox (802), a battery (803), and a fuel tank (804). The engine (801) is mounted on a support plate of the enclosure frame (118) near the grain bin (501). The fuel tank (804) is arranged adjacent to the engine (801). The engine (801) is equipped with a chimney. Above the engine (801), a gearbox (802) is mounted on the enclosure frame (118). The input end of the gearbox (802) is connected to the drive end of the engine (801) via a belt. Above the fuel tank (804), a battery (803) is mounted on the enclosure frame (118). The battery (803) is arranged adjacent to the gearbox (802) and is electrically connected to the engine (801). The output end of the gearbox (802) is connected to a pulley at one end of the threshing auger (302) via a belt. The clutch device (9) includes a clutch screw (901), a clutch rocker (902), a clutch crank (903), a clutch plate (904), and a clutch fan plate (905). The clutch screw (901) is a threaded rod with a cap. After the clutch screw (901) is fitted with a spring, it is inserted into the hinged pin hole inside the upper connecting pin plate (106). The spring is located between the cap and the pin. The clutch screw (901) is threadedly connected to the upper part of the clutch rocker (902). One end of the horizontal clutch crank (903) is inserted into the hole of the lower connecting pin plate (106) and hinged to each other. The clutch crank (903) is a zigzag crank. Between the two lower connecting pin plates (106), two pieces are fixed at this end of the clutch crank (903). The clutch rocker arm (902) has a plate with a pin hole and an opening. The lower part of the clutch rocker arm (902) passes through the gap between the two plates and is hinged by a pin. The other end of the clutch crank (903) is fitted into two parallel clutch plates (904) and is positioned by a snap ring. The clutch plate (904) is a flat plate with holes. The upper end of the flat plate is provided with a bushing. The clutch crank arm (903) passes into the bushings of the two clutch plates (904). The holes at the flat plate of the clutch plate (904) are respectively fitted with the throttle rod and the engine clutch lever and are inserted with hinge pins. The clutch crank arm (903) has a clutch fan plate (905) in the middle. The clutch fan plate (905) has several holes. One end of the connecting rod is hinged in one of the holes. The other end of the connecting rod is hinged to the gearbox (802) clutch.

9. A corn harvester equipped with a backpack-type free threshing device according to claim 1, characterized in that: A top cover (10) is provided above the end of the side plate (119), and the top cover (10) is bolted to the side plate (119); a wind deflector (1001) is provided at the lower end of the top cover (10), and the wind deflector (1001) is hinged to the edge of the top cover (10) by a pin; a wind deflector adjustment plate (1002) is fixed at one end of the top cover (10), and a wind deflector seat plate (1005) is welded to the edge of the top cover (10) in several places. The wind deflector pin (1003) is inserted into the middle hinge hole of the wind deflector adjustment plate (1002) and the hinge hole of the wind deflector seat plate (1005) in sequence, and the two ends are clamped. Spring positioning enables hinged assembly; several right-angle connecting plates (1006) are provided, one end of which is hinged to the connecting lug of the wind deflector (1001), and the wind deflector pin (1003) is inserted into the other end of the right-angle connecting plate (1006) and fixed with a set screw; the wind deflector pin (1003) is an L-shaped shaft with a hole on its short side, and the wind deflector lock shaft (1004) is a shaft with a boss in the middle. One end of the wind deflector lock shaft (1004) is provided with a threaded rod. After the wind deflector lock shaft (1004) is fitted with a spring, it passes through the hole on the short side of the wind deflector pin (1003) and is locked with a nut.

10. A corn harvester equipped with a backpack-type free threshing device according to claim 3, characterized in that: The grain collecting auger (201), lifting auger (202), and lifting bracket (203) can be replaced by a conveyor belt device. At the grain collecting port (101) of the main vehicle (1), a horizontal conveyor belt is installed on this side of the grain collecting box. The horizontal conveyor belt is driven by the main vehicle (1) through chain drive. An input sprocket (1101) and a transition double tower pulley (1102) are installed at the end of the horizontal conveyor belt. At the same time, a lifting conveyor belt (1103) is installed on the shaft of the transition double tower pulley (1102). The lifting conveyor belt (1103) 03) The sprocket at the power input end is connected to one of the sprockets in the transition double tower wheel (1102) by a chain. The other sprocket of the transition double tower wheel (1102) is connected to the input sprocket (1101) by a chain. The input sprocket (1101) is driven by the sprocket of the coaxial horizontal conveyor belt. At the same time, a hydraulic cylinder is hinged at the rear end of the cab of the main vehicle (1). The other end of the hydraulic cylinder is hinged to the lifting conveyor belt (1103). The hydraulic cylinder is connected to the hydraulic oil circuit of the main vehicle (1). A control handle is provided in the main vehicle (1).

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