CN118661542A - Crawler-type agricultural harvester - Google Patents

Abstract

The invention relates to the technical field of harvesters, and discloses a crawler-type agricultural harvester.A harvesting mechanism is arranged at the front part of a harvester body, a threshing tank is connected to the rear end of one side of the harvesting mechanism through a conveying mechanism, a threshing cylinder, a rotating rod positioned at the center of the threshing cylinder and a plurality of groups of spiral blades positioned in the threshing cylinder are arranged in the threshing tank, the plurality of groups of spiral blades are uniformly distributed at the outer side of the rotating rod, and an engine of the harvester body drives the conveying mechanism to work through the harvesting mechanism; the air guide system blows air into the top of the left end of the threshing tank, the crop straws entering the left end of the threshing tank from the grid groove can be blown away by the air sprayed out through the nozzles, the crop straws are prevented from being blocked in the left end of the threshing tank, the crop straws are smoothly blown out through the straw discharge groove, and meanwhile, the air guide system blows air into the threshing tank for blowing dust to clean crop fruit particles.

Description

A crawler agricultural harvester

Technical Field

The invention relates to the technical field of harvesters, and in particular to a crawler type agricultural harvester.

Background Art

A harvester is an integrated machine for harvesting crops. It completes harvesting and threshing at one time, and collects the grains into a storage bin. The general threshing mechanism often uses a pressure roller or a rotating roller to rotate in a fixed separation cylinder to achieve the purpose of threshing, but this threshing efficiency is low, and the grains of crops after threshing are mixed with some straw debris. Either an additional fan mechanism is required on the harvester to remove impurities independently, or impurities need to be manually screened before subsequent sales. For this reason, we have launched a crawler agricultural harvester.

Summary of the invention

The object of the present invention is to provide a crawler agricultural harvester to solve the problems raised in the above background technology.

To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a crawler agricultural harvester, comprising a vehicle body driven by a crawler walking mechanism, a harvesting mechanism is arranged at the front of the vehicle body, a rear end of one side of the harvesting mechanism is connected to a threshing tank through a conveying mechanism, a threshing cylinder, a rotating rod located at the center of the threshing cylinder and a plurality of groups of spiral blades located inside the threshing cylinder are arranged inside the threshing tank, the plurality of groups of spiral blades are evenly distributed outside the rotating rod, and a protruding rod on the rotating rod extends into a spiral groove on the spiral blade;

The engine of the vehicle body drives the conveying mechanism to work through the harvesting mechanism, and the conveying mechanism drives the threshing cylinder, the rotating rod and the spiral blade to rotate simultaneously through the first gear mechanism to realize threshing of the crops in the threshing cylinder. At the same time, the spiral blade conveys the crops entering the right end of the threshing tank into the threshing cylinder, and pushes the crop straw through the left end of the threshing cylinder to the straw discharge groove at the bottom of the left end of the threshing tank;

An air collecting cylinder is provided at the rear upper end of the vehicle body, and the first gear mechanism drives the fan blades inside the air collecting cylinder to rotate through the second gear mechanism, so that the outside air is introduced into the top of the left end of the threshing tank and the threshing trough at the lower end of the threshing tank through the air guide system at the left end of the air collecting cylinder;

The air guide system blows air into the top of the left end of the threshing tank to blow out the crop straw through the straw discharge groove. At the same time, the air guide system blows air into the threshing groove to clean the crop fruit particles.

The crop fruit particles fall into the screening mechanism through the threshing chute, and the second gear mechanism drives the screening mechanism inside the vehicle body to perform reciprocating motion, so as to screen the crop fruit particles and the straw debris mixed in the crop fruit particles.

Preferably, the harvesting mechanism includes a harvesting platform arranged at the front of the vehicle body, a cutting blade arranged at the front end of the bottom of the harvesting platform, a spiral conveying cylinder arranged inside the harvesting platform, and a reel above the harvesting platform.

Preferably, the conveying mechanism comprises a conveying shell connected to the rear end of one side of the harvesting platform, a driven roller and a driving roller connected at both ends inside the conveying shell, and a conveying belt connected between the driven roller and the driving roller;

The rear end of the conveying housing is connected to the front side of the right end of the threshing tank;

The first gear mechanism includes a first belt pulley fixed after the right end of the driven roller extends through the conveying housing, an intermediate gear and a second belt pulley connected after the right end of the rotating rod extends through the threshing tank, a rotating shaft fixed at the right end of the spiral blade, and a side gear connected after the right end of the rotating shaft extends through the threshing tank;

The first pulley is connected to the second pulley via a first belt, and the side gear is meshed with the side of the intermediate gear;

The center of the left opening of the threshing cylinder is connected with a fixed plate through a support rod, the left end of the rotating rod is fixed to the middle of the fixed plate, and a plurality of groups of arc grilles are arranged between adjacent support rods, and grille slots are arranged between adjacent arc grilles.

Preferably, a threshing net is provided in the middle of the threshing cylinder, and a trumpet pipe is connected to the right end of the threshing cylinder;

An annular inclined surface protrusion is also arranged on the inner wall of the threshing tank, and the annular inclined surface protrusion is located outside the trumpet tube.

Preferably, the inner wall of the threshing tank is movably connected with a support wheel supported on the surface of the threshing cylinder, and a bearing sleeved on the rotating shaft is embedded inside the right end of the threshing tank.

Preferably, the inner wall of the threshing cylinder is also evenly distributed with conical protrusions.

Preferably, the second gear mechanism comprises a connecting shaft fixed at the middle of the right end of the fan blade, a third pulley connected to the right end of the connecting shaft after extending through the air collecting cylinder, a driving shaft arranged on the lower right wall inside the vehicle body, a rotating disk fixed at the left end of the driving shaft, and a fourth pulley connected to the right end of the driving shaft after extending through the vehicle body;

The third pulley, the fourth pulley and the second pulley are connected by a second belt;

The screening mechanism comprises a screen, an upper connecting plate connected to the side of the screen through a first pin, a second pin movably connected to the inner wall of the vehicle body at the top of the upper connecting plate, a lower connecting plate movably connected to the side of the screen through a third pin, and a fourth pin movably connected to the left side of the turntable at the lower end of the lower connecting plate;

A material receiving trough is arranged on the top of the front end of the sieve, and the threshing trough extends into the material receiving trough.

Preferably, the air guide system includes an air collecting pipe connected to the center of the left end of the air collecting cylinder, an air guide pipe connected to the left end of the air collecting pipe, an arc tube connected after the air guide pipe extends into the inner top wall of the left end of the threshing tank, a nozzle connected to the lower end of the arc tube, and an air guide nozzle connected between the air collecting pipe and the threshing trough.

Compared with the prior art, the beneficial effects of the present invention are as follows: the conveying mechanism of the present invention drives the threshing drum, the rotating rod and the spiral blades to rotate simultaneously through the first gear mechanism, thereby improving the threshing efficiency of the crops in the threshing drum; the first gear mechanism drives the fan blades inside the air collecting cylinder to rotate through the second gear mechanism, thereby introducing the outside air into the top of the left end of the threshing tank and the threshing groove at the lower end of the threshing tank through the air guide system at the left end of the air collecting cylinder, and the air guide system blows the air into the top of the left end of the threshing tank to blow the crop straw through the straw discharge groove The air sprayed out through the nozzle can blow away the crop straw that enters the left end of the threshing tank from the grille slot, prevent the crop straw from being blocked in the left end of the threshing tank, and make the crop straw blow out smoothly through the straw discharge slot. At the same time, the air guide system blows air to the threshing slot to blow away the crop fruit particles; the crop fruit particles fall into the screening mechanism through the threshing slot, and the second gear mechanism drives the screening mechanism inside the vehicle body to perform reciprocating motion, so as to screen the crop fruit particles and the straw debris mixed in the crop fruit particles.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the overall three-dimensional structure of the present invention;

FIG2 is a schematic diagram of the exploded structure of the connection between the driving wheel and the base of the present invention;

FIG3 is a schematic diagram of the three-dimensional structure of FIG2 after the whole assembly of the present invention;

FIG4 is a schematic diagram of the structure of the crawler walking mechanism of the present invention when the crawler walking mechanism is in the form of a triangular crawler;

FIG5 is a schematic diagram of the structure of the crawler walking mechanism of the present invention when it is in the form of a parallelogram crawler;

FIG6 is a schematic diagram of the structure of the crawler walking mechanism of the present invention when the crawler walking mechanism is in the form of an inverted trapezoidal crawler;

FIG7 is an enlarged structural schematic diagram of point A in FIG1 of the present invention;

8 is a schematic diagram of the exploded structure of the connection between the threshing cylinder, the rotating rod, the spiral blades, the side gears and the intermediate gears of the present invention;

Fig. 9 is a schematic diagram of the three-dimensional structure of the threshing cylinder of the present invention from another perspective;

FIG10 is a schematic diagram of the three-dimensional structure of the spiral blade, the rotating shaft and the bearing assembly of the present invention;

11 is a cross-sectional view of the connection between the threshing tank, the support wheel, the threshing cylinder, the spiral blades and the rotating rod of the present invention;

12 is a schematic diagram of the side cross-sectional structure of the connection between the threshing tank, threshing cylinder, spiral blades and rotating rod of the present invention;

13 is a cross-sectional view of the connection between the threshing tank, the air guide nozzle and the nozzle of the present invention;

FIG14 is a schematic diagram of the exploded structure of the screening mechanism and the air guide system of the present invention;

FIG. 15 is a schematic cross-sectional view of the screening mechanism, air guide system and conveying mechanism of the present invention.

In the figure: 1. crawler walking mechanism; 101. base; 102. large driving wheel; 103. mobile bracket; 104. first connecting frame; 105. auxiliary wheel disc; 106. second hydraulic cylinder; 107. second connecting frame; 108. driving wheel disc; 109. third hydraulic cylinder; 110. first hydraulic cylinder; 111. small driven wheel; 112. crawler; 2. harvesting platform; 3. cutting blade; 4. spiral conveyor Delivery cylinder; 5. Reel; 6. Operation table; 7. Threshing tank; 71. Threshing trough; 72. Straw discharge trough; 73. Annular inclined surface protrusion; 8. Conveying shell; 9. Vehicle body; 10. Air guide pipe; 1001. Arc pipe; 1002. Nozzle; 11. Air collecting pipe; 12. Air collecting cylinder; 121. Fan blade; 122. Connecting shaft; 13. Air inlet channel; 131. Dustproof net; 14. Air guide nozzle; 15. 1st pulley; 16. 1st belt; 17. side gear; 18. 2nd pulley; 19. 4th pulley; 20. 2nd belt; 21. 3rd pulley; 22. intermediate gear; 23. spiral blade; 231. rotating shaft; 232. bearing; 24. rotating rod; 241. protruding rod; 25. threshing cylinder; 251. threshing screen; 252. trumpet tube; 253. supporting wheel; 254. supporting rod; 255. arc grille; 256. grille slot; 257. fixing plate; 258. conical protrusion; 26. receiving trough; 27. sieve; 271. upper connecting plate; 272. 2nd pin shaft; 273. 1st pin shaft; 274. 3rd pin shaft; 275. lower connecting plate; 276. rotating disk; 277. 4th pin shaft; 278. driving shaft; 28. driven roller; 29. active roller; 30. conveyor belt.

DETAILED DESCRIPTION

The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

Example:

Please refer to Figures 1-15, the present invention provides a technical solution:

A crawler agricultural harvester comprises a vehicle body 9 driven by a crawler walking mechanism 1, and an operating platform 6 is also provided on the vehicle body 9;

As shown in Figures 2 and 3, the crawler walking mechanism 1 includes a base 101 installed on both sides of the bottom of the vehicle body 9, a large driving wheel 102 installed on the base 101, a moving bracket 103 slidingly connected to the base 101 front and rear, a small driven wheel 111 installed on the moving bracket 103, an auxiliary wheel disc 105 connected to the upper end of the moving bracket 103 through a first hydraulic cylinder 110, and a driving wheel disc 108 connected to the upper end of the base 101 through a second hydraulic cylinder 106.

A crawler track 112 is connected between the active wheel disc 108, the auxiliary wheel disc 105, the large driving wheel 102 and the small driven wheel 111; a third hydraulic cylinder 109 is also installed on the base 101, and the third hydraulic cylinder 109 is used to control the length of the mobile bracket 103 extending from the base 101; a first connecting frame 104 is movably installed on the auxiliary wheel disc 105, and the piston rod of the first hydraulic cylinder 110 is connected to the first connecting frame 104, and the first hydraulic cylinder 110 is movably installed on the upper end of the mobile bracket 103, and the first hydraulic cylinder 110 is used to adjust the position of the auxiliary wheel disc 105.

The second hydraulic cylinder 106 is vertically fixed to the upper end of the base 101, the piston rods of the front and rear sets of the second hydraulic cylinders 106 are connected to the second connecting frame 107, and the driving wheel 108 is movably connected between the left and right sets of the second connecting frames 107, and the second hydraulic cylinder 106 is used to adjust the height of the driving wheel 108;

The crawler walking mechanism 1 can change the crawler in various forms, and can adjust the shape and size of the crawler according to different terrains and working environments to meet the operation requirements in various terrains, so as to adapt to different terrains and working environments. This helps to improve the passability and adaptability of the machine, so that it can operate stably on complex terrains.

As shown in FIG. 4 , the crawler walking mechanism 1 is in the form of a triangular crawler, as shown in FIG. 5 , the crawler walking mechanism 1 is in the form of a parallelogram crawler, and as shown in FIG. 6 , the crawler walking mechanism 1 is in the form of an inverted trapezoidal crawler.

A harvesting mechanism is provided at the front of the vehicle body 9, and the harvesting mechanism includes a harvesting platform 2 provided at the front of the vehicle body 9, a cutting blade 3 provided at the front end of the bottom of the harvesting platform 2, a spiral conveying cylinder 4 provided inside the harvesting platform 2, and a reel 5 above the harvesting platform 2.

The cutting blade 3, the spiral conveying cylinder 4 and the reel 5 are driven simultaneously by the engine of the vehicle body 9. How the cutting blade 3, the spiral conveying cylinder 4 and the reel 5 are driven simultaneously by the engine belongs to the prior art and will not be described in detail.

The reel 5 pushes the crops into the harvesting platform 2, the cutting blade 3 cuts the roots of the crops, and then the crops enter the harvesting platform 2. Under the action of the spiral conveyor cylinder 4, the crops enter the bottom of the conveying shell 8; the rear end of one side of the harvesting mechanism is connected to a threshing tank 7 through a conveying mechanism, and a threshing cylinder 25, a rotating rod 24 located at the center of the threshing cylinder 25 and a plurality of groups of spiral blades 23 located inside the threshing cylinder 25 are arranged inside the threshing tank 7, and the plurality of groups of spiral blades 23 are evenly distributed on the outside of the rotating rod 24.

The protruding rod 241 on the rotating rod 24 extends into the spiral groove on the spiral blade 23. When the protruding rod 241 on the rotating rod 24 enters the spiral groove on the spiral blade 23, the protruding rod 241 can thresh the crops in the spiral groove of the spiral blade 23, thereby improving the threshing effect of the crops.

When the first pulley 15 drives the intermediate gear 22 and the rotating rod 24 to rotate through the first belt 16 and the second pulley 18, the threshing cylinder 25, the rotating rod 24 and the spiral blade 23 rotate simultaneously, and the threshing cylinder 25 is driven to rotate by the rotating rod 24, and the rotation speeds of the two are consistent. The size of the intermediate gear 22 is larger than that of the side gear 17, so that the rotation speed of the spiral blade 23 is greater than the rotation speeds of the threshing cylinder 25 and the rotating rod 24, that is, the rotation of the spiral blade 23 has a certain speed difference with the rotation of the threshing cylinder 25 and the rotating rod 24, which is conducive to improving the efficiency of the threshing cylinder 25, the rotating rod 24 and the spiral blade 23 rotating simultaneously to thresh the crops in the threshing cylinder 25;

At the same time, the threshing cylinder 25 rotates in the same direction as the rotating rod 24, and the spiral blade 23 rotates in the opposite direction to the threshing cylinder 25 and the rotating rod 24, which is also conducive to improving the efficiency of threshing the crops in the threshing cylinder 25 by the simultaneous rotation of the threshing cylinder 25, the rotating rod 24 and the spiral blade 23;

The engine of the vehicle body 9 drives the conveying mechanism to work through the harvesting mechanism, and the conveying mechanism includes a conveying housing 8 connected to the rear end of one side of the harvesting platform 2, a driven roller 28 and a driving roller 29 connected at both ends of the conveying housing 8, and a conveying belt 30 connected between the driven roller 28 and the driving roller 29 (as shown in FIG. 15 );

The rear end of the conveying housing 8 is connected to the front side of the right end of the threshing tank 7 (as shown in FIGS. 1 and 7 );

Among them, the active roller 29 of the conveying mechanism is also driven by the engine of the vehicle body 9, which belongs to the existing technology and will not be described in detail.

The active roller 29 rotates, thereby driving the conveyor belt 30 to rotate inside the conveying shell 8, and transporting the clamping in the bottom of the conveying shell 8 upward to the inside of the right end of the threshing tank 7.

The first gear mechanism includes a first pulley 15 fixed after the right end of the driven roller 28 extends through the conveying shell 8, an intermediate gear 22 and a second pulley 18 connected after the right end of the rotating rod 24 extends through the threshing tank 7, a rotating shaft 231 fixed at the right end of the spiral blade 23, and a side gear 17 connected after the right end of the rotating shaft 231 extends through the threshing tank 7; the first pulley 15 is connected to the second pulley 18 through the first belt 16, and the side gear 17 is meshed with the side of the intermediate gear 22; a fixed disk 257 is connected to the center of the left end opening of the threshing cylinder 25 through a support rod 254, and the left end of the rotating rod 24 is fixed to the middle of the fixed disk 257. When the first pulley 15 drives the intermediate gear 22 and the rotating rod 24 to rotate through the first belt 16 and the second pulley 18, the rotating rod 24 can drive the threshing cylinder 25 to rotate in the threshing tank 7.

The driven roller 28 is fixedly connected to the first pulley 15. When the driving roller 29 of the conveying mechanism is also driven by the engine of the vehicle body 9, the driving roller 29 drives the driven roller 28 to rotate through the conveyor belt 30, and the driven roller 28 drives the first pulley 15 to rotate, so that the first pulley 15 drives the second pulley 18 to rotate through the first belt 16, and the second pulley 18 drives the intermediate gear 22 and the rotating rod 24 to rotate simultaneously;

A plurality of groups of arc grilles 255 are provided between adjacent support rods 254, and grille slots 256 are provided between adjacent arc grilles 255. Thus, when the spiral blades 23 push the crops in the threshing cylinder 25 to the left end of the threshing cylinder 25, the threshed crop straw can smoothly pass through the grille slots 256 and enter the left end of the threshing tank 7 until the crop straw falls and is discharged through the straw discharge slot 72;

A threshing net 251 is provided in the middle of the threshing cylinder 25, and a trumpet tube 252 is connected to the right end of the threshing cylinder 25. An annular inclined surface protrusion 73 is also provided on the inner wall of the threshing tank 7, and the annular inclined surface protrusion 73 is located outside the trumpet tube 252 (as shown in Figures 12 and 13). In this way, when the right end of the spiral blade 23 transports the crops inside the right end of the threshing tank 7, the crops can be smoothly transported to the inside of the threshing cylinder 25 through the trumpet tube 252;

The inner wall of the threshing tank 7 is movably connected with a support wheel 253 supported on the surface of the threshing cylinder 25, so that the threshing cylinder 25 can rotate smoothly under the support of the support wheel 253 on the threshing cylinder 25, and a bearing 232 sleeved on the rotating shaft 231 is embedded in the right end of the threshing tank 7.

The inner wall of the threshing cylinder 25 is also evenly distributed with conical protrusions 258. When the threshing cylinder 25 rotates, the conical protrusions 258 are arranged so that the conical protrusions 258 contact the crops in the threshing cylinder 25, thereby further achieving threshing of the crops.

The conveying mechanism drives the threshing drum 25, the rotating rod 24 and the spiral blade 23 to rotate simultaneously through the first gear mechanism to realize the threshing of the crops in the threshing drum 25. At the same time, the spiral blade 23 conveys the crops entering the right end of the threshing tank 7 into the threshing drum 25, and pushes the crop straw through the left end of the threshing drum 25 to the straw discharge groove 72 at the bottom of the left end of the threshing tank 7.

An air collecting cylinder 12 is provided at the rear upper end of the vehicle body 9, an air intake passage 13 is provided at the upper right end of the air collecting cylinder 12, and a dustproof net 131 is provided at the right end of the air intake passage 13 (as shown in FIG. 7 ).

The second gear mechanism includes a connecting shaft 122 fixed at the middle part of the right end of the fan blade 121, a third pulley 21 connected to the right end of the connecting shaft 122 extending through the air collecting cylinder 12, a driving shaft 278 arranged on the lower right wall inside the vehicle body 9, a turntable 276 fixed at the left end of the driving shaft 278, and a fourth pulley 19 connected to the right end of the driving shaft 278 extending through the vehicle body 9.

The third pulley 21, the fourth pulley 19 and the second pulley 18 are connected by the second belt 20; the second pulley 18 drives the third pulley 21 and the fourth pulley 19 to rotate through the second belt 20, the third pulley 21 drives the fan blades 121 inside the air collecting cylinder 12 to rotate through the connecting shaft 122, and the fourth pulley 19 drives the turntable 276 to rotate through the driving shaft 278.

The screening mechanism includes a sieve 27, an upper connecting plate 271 connected to the side of the sieve 27 through a first pin 273, a second pin 272 movably connected to the inner wall of the vehicle body 9 at the top of the upper connecting plate 271, a lower connecting plate 275 movably connected to the side of the sieve 27 through a third pin 274, and a fourth pin 277 movably connected to the left side of the rotating disk 276 at the lower end of the lower connecting plate 275;

When the turntable 276 rotates, the sieve 27 is driven through the lower connecting plate 275. At this time, the upper connecting plate 271 on the sieve 27 rotates relatively, so that the sieve 27 reciprocates in the up and down directions inside the vehicle body 9, so as to screen the crop fruit particles in the sieve 27 and the straw debris mixed in the crop fruit particles.

The first gear mechanism drives the fan blades 121 inside the air collecting cylinder 12 to rotate through the second gear mechanism, thereby introducing the outside air into the top of the left end of the threshing tank 7 and the threshing trough 71 at the lower end of the threshing tank 7 through the air guide system at the left end of the air collecting cylinder 12.

The air guide system blows air into the top of the left end of the threshing tank 7 to blow out the crop straw through the straw discharge groove 72. At the same time, the air guide system blows air into the threshing groove 71 to blow off the crop fruit particles; the crop fruit particles fall into the screening mechanism through the threshing groove 71, and the second gear mechanism drives the screening mechanism inside the vehicle body 9 to reciprocate to screen the crop fruit particles and the straw debris mixed in the crop fruit particles.

The gas guide system includes an air collecting pipe 11 connected to the center of the left end of the air collecting cylinder 12, an air guide pipe 10 connected to the left end of the air collecting pipe 11, an arc tube 1001 connected after the air guide pipe 10 extends into the inner top wall of the left end of the threshing tank 7, a nozzle 1002 connected to the lower end of the arc tube 1001, and an air guide nozzle 14 connected between the air collecting pipe 11 and the threshing tank 71.

When the fan blades 121 rotate inside the air collecting cylinder 12, negative pressure is formed inside the air collecting cylinder 12, so that the outside air passes through the dustproof net 131 and then enters the air collecting cylinder 12 and the air collecting pipe 11 in sequence through the air inlet channel 13;

The diameter of the air collecting pipe 11 is smaller than the diameter of the air collecting cylinder 12, so that when the air in the air collecting cylinder 12 enters the air collecting pipe 11, the speed of the air is accelerated, and the pressure of the air discharged from the air collecting pipe 11 is increased;

A material receiving groove 26 is provided at the top of the front end of the sieve 27. When the sieve 27 is at the highest position, the threshing groove 71 extends into the material receiving groove 26, and there is a gap between the outer side of the threshing groove 71 and the inner wall of the material receiving groove 26. When the sieve 27 is at the lowest position, the threshing groove 71 is located above the material receiving groove 26, so that the air guide nozzle 14 can blow and clean the crop fruit particles in the threshing groove 71 and blow out the straw debris mixed in the crop fruit particles.

A portion of the air in the air collecting pipe 11 is directly sprayed into the threshing tank 71 through the air guide nozzle 14 (as shown in Figures 12, 13 and 15), and the crop fruit particles that fall into the threshing tank 71 through the threshing screen 251 are blown and cleaned, and the straw debris mixed in the crop fruit particles is blown out;

Another part of the air in the air collecting pipe 11 enters the arc pipe 1001 through the air guide pipe 10, and is finally sprayed to the left end of the threshing tank 7 through the nozzle 1002 connected to the lower end of the arc pipe 1001. At this time, the air sprayed through the nozzle 1002 can blow away the crop straw entering the left end of the threshing tank 7 from the grille groove 256, preventing the crop straw from being blocked in the left end of the threshing tank 7, so that the crop straw can be blown out smoothly through the straw discharge groove 72.

Specifically, when in use, the reel 5 moves the crops toward the inside of the harvesting platform 2, and the cutting blade 3 cuts the roots of the crops, and then the crops enter the harvesting platform 2, and under the action of the spiral conveying cylinder 4, the crops enter the bottom of the conveying shell 8;

The active roller 29 rotates, thereby driving the conveyor belt 30 to rotate inside the conveying shell 8, and transporting the clamping inside the bottom of the conveying shell 8 upward to the inside of the right end of the threshing tank 7;

When the first pulley 15 drives the intermediate gear 22 and the rotating rod 24 to rotate through the first belt 16 and the second pulley 18, the threshing cylinder 25, the rotating rod 24 and the spiral blade 23 rotate simultaneously;

The right end of the spiral blade 23 transports the crops inside the right end of the threshing tank 7, and transports the crops to the inside of the threshing cylinder 25 through the trumpet tube 252;

At this time, when the threshing cylinder 25, the rotating rod 24 and the spiral blade 23 rotate simultaneously, the left end portion of the spiral blade 23, the protruding rod 241 on the rotating rod 24 and the conical protrusion 258 on the inner wall of the threshing cylinder 25 squeeze and stir the crops inside the threshing cylinder 25 for threshing;

The crop fruit particles produced after the extrusion and stirring threshing fall into the threshing tank 71 through the threshing screen 251, and the crop straw produced after the extrusion and stirring threshing enters the left end of the threshing tank 7 through the grille slot 256 under the push of the spiral blade 23;

When the fan blades 121 rotate inside the air collecting cylinder 12, negative pressure is formed inside the air collecting cylinder 12, so that the outside air passes through the dustproof net 131 and then enters the air collecting cylinder 12 and the air collecting pipe 11 in sequence through the air inlet channel 13;

A portion of the air in the air collecting pipe 11 is directly sprayed into the threshing tank 71 through the air guide nozzle 14 (as shown in Figures 12, 13 and 15), and the crop fruit particles that fall into the threshing tank 71 through the threshing screen 251 are blown and cleaned, and the straw debris mixed in the crop fruit particles is blown out;

Another part of the air in the air collecting pipe 11 enters the arc pipe 1001 through the air guide pipe 10, and is finally sprayed to the left end of the threshing tank 7 through the nozzle 1002 connected to the lower end of the arc pipe 1001. At this time, the air sprayed through the nozzle 1002 can blow away the crop straw entering the left end of the threshing tank 7 from the grille groove 256, preventing the crop straw from being blocked in the left end of the threshing tank 7, so that the crop straw can be blown out smoothly through the straw discharge groove 72.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims (8)

1. The utility model provides a crawler-type agricultural harvester, includes the automobile body through crawler travel mechanism driven, the front portion of automobile body is equipped with reaping mechanism, reaping mechanism one side rear end is connected with threshing cylinder through conveying mechanism, its characterized in that: the threshing cylinder is internally provided with a threshing cylinder, a rotating rod positioned at the center of the threshing cylinder and a plurality of groups of spiral blades positioned in the threshing cylinder, the plurality of groups of spiral blades are uniformly distributed on the outer side of the rotating rod, and a protruding rod on the rotating rod extends into a spiral groove on the spiral blade;

the engine of the vehicle body drives the conveying mechanism to work through the harvesting mechanism, the conveying mechanism drives the threshing cylinder, the rotating rod and the spiral blade to rotate simultaneously through the first gear mechanism so as to achieve threshing of crops in the threshing cylinder, and meanwhile, the spiral blade conveys the crops entering the right end of the threshing cylinder into the threshing cylinder, and crop straws are pushed to a straw discharge groove at the bottom of the left end of the threshing cylinder through the left end of the threshing cylinder;

The rear part of the upper end of the vehicle body is provided with a gas cylinder, and the first gear mechanism drives fan blades in the gas cylinder to rotate through the second gear mechanism, so that external air is respectively introduced into the top of the left end of the threshing tank and the threshing groove at the lower end of the threshing tank through an air guide system at the left end of the gas cylinder;

The air guide system blows air into the top of the left end of the threshing tank to blow crop straws out through the straw discharge groove, and simultaneously blows air into the threshing tank to blow dust to clean crop fruit particles;

The crop fruit particles fall into the screening mechanism through the threshing groove, and the second gear mechanism drives the screening mechanism in the vehicle body to reciprocate so as to screen the crop fruit particles and straw scraps doped in the crop fruit particles.

2. A tracked agricultural harvester according to claim 1, wherein: the harvesting mechanism comprises a harvesting platform arranged at the front part of the harvesting platform, a cutting blade arranged at the front end of the bottom of the harvesting platform, a spiral conveying cylinder arranged in the harvesting platform and a reel above the harvesting platform.

3. A tracked agricultural harvester according to claim 2, wherein: the conveying mechanism comprises a conveying shell connected to the rear end of one side of the header, a driven roller and a driving roller which are connected to the two ends of the inside of the conveying shell, and a conveying belt connected between the driven roller and the driving roller;

the rear end of the conveying shell is connected to the front side of the right end of the threshing tank;

The first gear mechanism comprises a driven roller with the right end penetrating through a first belt pulley fixed after extending out of the conveying shell the right end of the rotating rod penetrates through the middle gear and the second belt pulley which are connected after extending out of the threshing tank a rotating shaft fixed at the right end of the spiral blade and a side gear connected with the right end of the rotating shaft after penetrating and extending out of the threshing tank;

The first belt pulley is connected with the second belt pulley through a first belt, and the side gears are meshed with the side edges of the intermediate gears;

The center of the opening at the left end of the threshing cylinder is connected with a fixed disc through a supporting rod, the left end of the rotating rod is fixed in the middle of the fixed disc, a plurality of groups of arc-shaped grids are arranged between adjacent supporting rods, and grid grooves are formed between adjacent arc-shaped grids.

4. A tracked agricultural harvester according to claim 1, wherein: a threshing leakage net is arranged in the middle of the threshing cylinder, and the right end of the threshing cylinder is connected with a horn pipe;

the threshing tank inner wall is also provided with an annular inclined plane bulge which is positioned at the outer side of the horn tube.

5. A tracked agricultural harvester according to claim 1, wherein: the inner wall of the threshing tank is movably connected with a supporting wheel supported on the surface of the threshing cylinder, and the right end of the threshing tank is internally embedded with a bearing sleeved on the rotating shaft.

6. A tracked agricultural harvester according to claim 1, wherein: conical protrusions are uniformly distributed on the inner wall of the threshing cylinder.

7. A tracked agricultural harvester according to claim 3, wherein: the second gear mechanism comprises a connecting shaft fixed in the middle of the right end of the fan blade, a third belt pulley connected with the right end of the connecting shaft after penetrating and extending out of the gas cylinder, a driving shaft arranged on the right wall below the inside of the vehicle body, a turntable fixed at the left end of the driving shaft and a fourth belt pulley connected with the right end of the driving shaft after penetrating and extending out of the vehicle body;

The third belt pulley, the fourth belt pulley and the second belt pulley are connected through a second belt;

The screening mechanism comprises a screen, an upper connecting plate connected to the side edge of the screen through a first pin shaft, a second pin shaft of which the top is movably connected to the inner wall of the vehicle body, a lower connecting plate of which the side edge of the screen is movably connected through a third pin shaft, and a fourth pin shaft of which the lower end is movably connected to the side edge of the left end of the turntable;

the top of the front end of the sieve is provided with a receiving groove, and the threshing groove extends into the receiving groove.

8. A tracked agricultural harvester according to claim 1, wherein: the air guide system comprises an air collecting pipe connected to the center of the left end of the air collecting pipe, an air guide pipe connected to the left end of the air collecting pipe, an arc-shaped pipe connected after the air guide pipe stretches into the top wall inside the left end of the threshing tank, a nozzle connected to the lower end of the arc-shaped pipe, and an air guide spray pipe connected between the air collecting pipe and the threshing tank.