Traction type grain elevator

Abstract

The utility model discloses a traction type grain elevator which comprises a traction machine box, a grain elevator mechanism, a negative pressure mechanism, a spiral material lifting machine and a grain storage bin, the grain elevator mechanism is arranged on one side of the traction machine box, the negative pressure mechanism is further arranged in the traction machine box and comprises a negative pressure bin, a grain outlet is formed in the bottom of the negative pressure bin, and the spiral material lifting machine is arranged in the grain storage bin. In addition, the spiral lifting mechanism is fixedly connected to the traction case, a grain inlet in the bottom of the spiral lifting mechanism corresponds to a grain outlet, a grain storage bin is further rotationally connected to the traction case, the grain storage bin corresponds to a grain discharge port of the spiral lifting mechanism, an overturning oil cylinder is rotationally connected to the traction case, and the overturning oil cylinder is connected with the spiral lifting mechanism. The overturning oil cylinder is rotationally connected with the grain storage bin, and a power shaft is rotationally connected to the traction machine box and is in power connection with the negative pressure mechanism and the spiral material lifting machine. The utility model relates to the technical field of grain elevators, and has the characteristics of quickening the production efficiency, being suitable for being used in small-scale farmlands, and being low in failure rate.

Description

Technical Field

[0001] This utility model relates to the field of grain suction machine technology, specifically a traction grain suction machine. Background Technology

[0002] In current technologies, grain collection is mostly done manually, which results in extremely low collection efficiency.

[0003] To address the aforementioned issues, existing technologies utilize grain suction machines for automatic collection. However, traditional grain suction machines still present the following technical problems in practical use:

[0004] Most existing grain suction machines are stand-alone devices, requiring additional power systems (such as electric motors or diesel engines) and walking mechanisms. This design results in bulky equipment that is difficult to move and cannot be quickly transferred to various operating scenarios such as fields, drying yards, and grain warehouses. Especially in small-scale, scattered farmland operations, the difficulty in transporting the equipment seriously affects operational efficiency. Utility Model Content

[0005] In view of the above-mentioned shortcomings in the existing technology, the purpose of this utility model is to provide a traction grain suction machine that can accelerate production efficiency, is suitable for small-scale farmland use, and has a low failure rate.

[0006] The technical solution adopted by this utility model to achieve the above objectives is: a traction-type grain suction machine, including a traction machine box, a grain suction mechanism, a negative pressure mechanism, a screw conveyor, and a grain storage bin, wherein the grain suction mechanism is provided on one side of the traction machine box;

[0007] The traction machine box is equipped with the negative pressure mechanism, which includes a negative pressure chamber capable of generating negative pressure. The bottom of the negative pressure chamber is provided with a grain outlet, and the negative pressure chamber is connected to the grain suction mechanism via a pipeline.

[0008] The tractor housing is fixedly connected to the screw conveyor mechanism, and the bottom of the screw conveyor mechanism is provided with a grain inlet, which corresponds to the grain outlet.

[0009] The traction machine is also rotatably connected to the grain storage bin, which corresponds to the grain discharge port of the screw conveyor. A tilting cylinder is rotatably connected to the traction machine, and the tilting cylinder is rotatably connected to the grain storage bin.

[0010] A power shaft is rotatably connected to the traction machine box, and the power shaft is poweredly connected to the negative pressure mechanism and the screw conveyor.

[0011] In the above technical solution, the grain suction mechanism includes a mechanism arm, a folding oil cylinder, a grain suction hood, rollers, and a first elastic component. The mechanism arm is rotatably connected to one side of the traction machine box. At least two sets of grain suction hoods are fixedly connected to the mechanism arm. The bottom of each set of grain suction hoods is rotatably connected to the rollers. The first elastic component is provided on the grain suction hood in cooperation with the rollers. The grain suction hood is connected to the negative pressure chamber pipeline.

[0012] The folding cylinder is rotatably connected to the traction machine box, and the folding cylinder is rotatably connected to the mechanism arm.

[0013] In the above technical solution, a rotating arm is rotatably connected to the bottom of the grain suction hood, and a roller is rotatably connected to the rotating arm;

[0014] The first elastic component includes a first spring, a first mounting bracket, and a first moving arm. The first mounting bracket is fixedly connected to the grain suction cover. The first mounting bracket has a first moving hole. The first moving arm passes through the first moving hole. One end of the first moving arm is rotatably connected to the rotating arm. The first moving arm has a first limiting plate. The first spring is sleeved on the first moving arm. One end of the first spring abuts against the first mounting bracket, and the other end abuts against the first limiting plate.

[0015] In the above technical solution, the mechanism arm includes an active arm and a passive arm, the active arm is rotatably connected to the traction machine box, and the folding cylinder is rotatably connected to the active arm;

[0016] One end of the active arm is rotatably connected to the passive arm, and the bottom of both the active arm and the passive arm are fixedly connected to the grain suction cover. A second elastic component is fitted between the active arm and the passive arm.

[0017] In the above technical solution, the second elastic component includes a second spring, a second mounting bracket, and a second moving arm. The second mounting bracket is fixedly connected to the active arm. The second mounting bracket is provided with a second moving hole. The second moving arm passes through the second moving hole and is rotatably connected to the passive arm. A second limiting plate is fixedly connected to the second moving arm. The second spring is sleeved on the second moving arm. One end of the second spring abuts against the second limiting plate, and the other end abuts against the second mounting bracket.

[0018] In the above technical solution, the negative pressure mechanism further includes a negative pressure fan and a fan baffle. The negative pressure fan and the negative pressure chamber are fixedly connected inside the traction machine box. An air intake is provided near the top of the negative pressure chamber, and an inclined surface is provided at the bottom of the negative pressure chamber near the grain outlet. The air inlet of the negative pressure fan is fixedly connected to the air intake. The fan baffle is fixedly connected inside the negative pressure chamber corresponding to the air intake, and an air inlet is provided at the top of the fan baffle.

[0019] In the above technical solution, a first driving pulley is fixedly connected to the power shaft, a first driven pulley is fixedly connected to the fan shaft of the negative pressure fan, the first driving pulley and the first driven pulley are connected by a first transmission belt, and a belt tensioning assembly is also provided in the traction housing in cooperation with the first transmission belt.

[0020] In the above technical solution, a drive sprocket is fixedly connected to the power shaft, a reducer is fixedly connected inside the traction machine housing, a driven sprocket is fixedly connected to the input shaft of the reducer, the drive sprocket and the driven sprocket are connected by a transmission chain, and a chain tensioning assembly is provided inside the traction machine housing in conjunction with the transmission chain.

[0021] The output shaft of the reducer is fixedly connected to the second driving pulley, and the input shaft of the screw conveyor is fixedly connected to the second driven pulley. The second driving pulley and the second driven pulley are connected by a second transmission belt.

[0022] In the above technical solution, a traction suspension connecting frame is fixedly connected to the traction machine box.

[0023] In the above technical solution, the fan baffle adopts an inverted trapezoidal structure.

[0024] The beneficial effects of this utility model are:

[0025] 1. The traction machine can be fixedly connected to the tractor, and the drive shaft can be connected to the tractor's power output. This allows the tractor to drive the grain suction machine. Simultaneously, the tractor's power is transmitted to the drive shaft, which in turn drives the negative pressure fan, creating negative pressure inside the negative pressure chamber. Under this negative pressure, the grain suction hood, close to the grain, draws the grain into the chamber. Then, under the influence of the fan baffle and gravity, the grain falls to the bottom and enters the screw conveyor. The drive shaft transmits power to the screw conveyor, which then transports the grain. Once inside the grain storage bin, the bin is tilted by a hydraulic cylinder, allowing the collected grain to be poured out. The aforementioned structure, with its tractor-driven chassis design, enables the grain suction machine to move flexibly with the tractor, making it suitable for various operations such as in fields and grain storage areas. This eliminates the hassle of separate transportation equipment, improves mobility, and the tractor serves multiple purposes. Farmers do not need to invest in dedicated grain suction equipment, making it particularly suitable for small and medium-sized farms with a short return on investment period. Furthermore, the negative pressure suction, spiral lifting, and grain bin tilting form a continuous automated process, reducing manual intervention, significantly improving grain collection efficiency, and is easy to operate.

[0026] 2. The mechanism arm includes an active arm and a passive arm, and a second elastic component is provided between the active arm and the passive arm. Each set of grain suction hoods is equipped with a roller at the bottom, and a first elastic component is provided in conjunction with the roller. In this way, the first elastic component and the second elastic component can make elastic movement between the roller and the ground, and between the active arm and the passive arm, thereby ensuring the ground clearance of the suction hood and ensuring excellent suction effect during the suction operation.

[0027] 3. The negative pressure fan, screw conveyor, and power shaft are connected by a power connection. After the tractor's power is input to the power shaft, both the negative pressure fan and the screw conveyor will work. This can meet the work requirements, has a low failure rate, and is more durable. The grain suction machine is driven directly by the tractor's power output, without the need for an additional independent engine, which reduces energy consumption and costs and maximizes the utilization of power resources. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of this utility model;

[0029] Figure 2 This is a structural schematic diagram of the present invention from another angle;

[0030] Figure 3 This is a schematic diagram of the grain suction mechanism in this utility model;

[0031] Figure 4 for Figure 3 Detailed structural diagram of part a;

[0032] Figure 5 for Figure 3 Detailed structural diagram of part b in the middle;

[0033] Figure 6 This is a schematic diagram of the negative pressure mechanism in this utility model;

[0034] Figure 7 This is a schematic diagram of the power shaft connection structure in this utility model;

[0035] Figure 8 This is a schematic diagram of the structure of the grain storage silo of this utility model.

[0036] In the picture: 100 traction machine box, 101 traction suspension connecting frame;

[0037] 200 Grain suction mechanism, 201 Mechanism arm, 2011 Active arm, 2012 Passive arm, 202 Folding cylinder, 203 Grain suction cover, 204 Roller, 205 First elastic component, 2051 First spring, 2052 First mounting bracket, 2053 First moving arm, 2054 First moving hole, 2055 First limiting plate, 206 Rotating arm, 207 Second elastic component, 2071 Second spring, 2072 Second mounting bracket, 2073 Second moving arm, 2074 Second limiting plate;

[0038] 300 Negative pressure mechanism, 301 Negative pressure fan, 302 Negative pressure silo, 303 Fan baffle, 304 Air intake, 305 Grain outlet, 306 Inclined surface, 307 Air inlet;

[0039] 400 screw conveyor, 401 grain inlet, 402 grain outlet;

[0040] 500 grain storage warehouses;

[0041] 600 hose;

[0042] 700 tilting hydraulic cylinder;

[0043] 801 Power shaft, 802 First driving pulley, 803 First driven pulley, 804 First transmission belt, 805 Belt tensioning assembly, 806 Driving sprocket, 807 Reducer, 808 Driven sprocket, 809 Transmission chain, 810 Chain tensioning assembly, 811 Second driving pulley, 812 Second driven pulley, 813 Second transmission belt. Detailed Implementation

[0044] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0045] Please see Figure 1 —8, a traction-type grain suction machine, including a traction machine housing 100, a grain suction mechanism 200, a negative pressure mechanism 300, a screw conveyor 400, and a grain storage bin 500. Firstly, a traction suspension connecting frame 101 is fixedly connected to the traction machine housing 100, so that the grain suction machine can be fixedly installed on the tractor through the traction suspension connecting frame 101.

[0046] Furthermore, a grain suction mechanism 200 is provided on one side of the tractor housing 100. The grain suction mechanism 200 includes a mechanism arm 201, a folding cylinder 202, a grain suction cover 203, a roller 204, and a first elastic component 205. That is, a mechanism arm 201 is rotatably connected to one side of the tractor housing 100, and at least two sets of grain suction covers 203 are fixedly connected to the mechanism arm 201. The bottom of each set of grain suction covers 203 is rotatably connected to a roller 204. The grain suction cover 203 is provided with a first elastic component 205 in cooperation with the roller 204. A folding cylinder 202 is also rotatably connected to the tractor housing 100. The folding cylinder 202 is rotatably connected to the mechanism arm 201. When the tractor moves, the suction cover can move synchronously under the action of the mechanism arm 201. The folding cylinder 202 can drive the folding arm to rotate so that the suction cover can be folded to the side, thereby facilitating the movement of the tractor.

[0047] Furthermore, a rotating arm 206 is rotatably connected to the bottom of the grain suction hood 203, and a roller 204 is rotatably connected to the rotating arm 206. The first elastic component 205 includes a first spring 2051, a first mounting bracket 2052, and a first moving arm 2053. That is, the first mounting bracket 2052 is fixedly connected to the grain suction hood 203, the first mounting bracket 2052 is provided with a first moving hole 2054, the first moving arm 2053 passes through the first moving hole 2054, one end of the first moving arm 2053 is rotatably connected to the rotating arm 206, the first moving arm 2053 is provided with a first limiting plate 2055, the first moving arm 2053 is sleeved with the first spring 2051, one end of the first spring 2051 abuts against the first mounting bracket 2052, and the other end abuts against the first limiting plate 2055.

[0048] Furthermore, the mechanism arm 201 includes an active arm 2011 and a passive arm 2012. The active arm 2011 is rotatably connected to the traction housing 100, and the folding cylinder 202 is rotatably connected to the active arm 2011. The passive arm 2012 is rotatably connected to one end of the active arm 2011. A grain suction cover 203 is fixedly connected to the bottom of both the active arm 2011 and the passive arm 2012. A second elastic component 207 is fitted between the active arm 2011 and the passive arm 2012. This second elastic component 207 includes a second spring 2071 and a second... Mounting bracket 2072, second moving arm 2073, the second mounting bracket 2072 is fixedly connected to the active arm 2011, the second mounting bracket 2072 is provided with a second moving hole, the second moving arm 2073 passes through the second moving hole, the second moving arm 2073 is rotatably connected to the passive arm 2012, the second moving arm 2073 is fixedly connected to a second limiting plate 2074, the second moving arm 2073 is fitted with a second spring 2071, one end of the second spring 2071 abuts against the second limiting plate 2074, the other end abuts against the second mounting bracket 2072;

[0049] When the suction beam hood moves in a straight line, the first elastic component 205 and the second elastic component 207 can make the roller 204 and the ground, and the active arm 2011 and the passive arm 2012 have elastic movement, thereby ensuring the ground clearance of the suction hood and ensuring excellent suction effect during suction operation.

[0050] Secondly, the traction machine box 100 is equipped with a negative pressure mechanism 300, which includes a negative pressure fan 301, a negative pressure chamber 302, and a fan baffle 303. That is, the negative pressure fan 301 and the negative pressure chamber 302 are fixedly connected inside the traction machine box 100. The negative pressure chamber 302 has an air intake 304 near its top and a grain outlet 305 near its bottom. The bottom of the negative pressure chamber 302 has a slope 306 near the grain outlet 305. The air inlet of the negative pressure fan 301 is fixedly connected to the air intake 304. The fan baffle 303 is fixedly connected inside the negative pressure chamber 302 corresponding to the air intake 304. The fan baffle 303 adopts an inverted trapezoidal structure and has an air inlet 307 at its top.

[0051] The aforementioned negative pressure chamber 302 and grain suction hood 203 are connected by a flexible hose 600. When the negative pressure fan 301 is working, it can generate negative pressure in the negative pressure chamber 302. Under the action of negative pressure, the grain suction hood 203 can suck up the grain on the ground. The sucked grain enters the negative pressure chamber 302. The fan baffle 303 can prevent the grain from being sucked into the fan the moment it enters the negative pressure chamber 302. Under the action of the fan baffle 303 and gravity, the grain can fall and be discharged from the grain outlet 305. The fan baffle 303 can also suck up lighter substances such as dust, dirt and impurities in the grain into the air outlet 307 for impurity removal.

[0052] Furthermore, a screw conveyor 400 is fixedly connected to the traction machine housing 100. The bottom of the screw conveyor 400 is provided with a grain inlet 401, which corresponds to the grain outlet 305. In this way, the grain discharged from the negative pressure chamber 302 can enter the screw conveyor 400. A grain storage silo 500 is also rotatably connected to the traction machine housing 100. The grain storage silo 500 corresponds to the grain outlet 402 of the screw conveyor 400. A tilting cylinder 700 is rotatably connected to the traction machine housing 100. The tilting cylinder 700 is rotatably connected to the grain storage silo 500. The screw conveyor 400 can lift the grain into the grain storage silo 500. When it is necessary to pour out the grain, the tilting cylinder 700 drives the grain storage silo 500 to tilt.

[0053] Finally, a power shaft 801 is rotatably connected to the traction housing 100. The power shaft 801 is powered to the negative pressure mechanism 300 and the screw conveyor 400. The power shaft 801 can be connected to the power output end of the tractor, so that the power shaft 801 transmits power to the negative pressure fan 301 and the screw conveyor 400 to achieve the required work. Specifically, a first drive pulley 802 is fixedly connected to the power shaft 801, and a first driven pulley 803 is fixedly connected to the fan shaft of the negative pressure fan 301. The first drive pulley 802 and the first driven pulley 803 are connected by a first transmission belt 804. A belt tensioning assembly 805 is also provided in the traction housing 100 in conjunction with the first transmission belt 804.

[0054] Furthermore, a drive sprocket 806 is fixedly connected to the drive shaft 801, a reducer 807 is fixedly connected inside the traction housing 100, a driven sprocket 808 is fixedly connected to the input shaft of the reducer 807, the drive sprocket 806 and the driven sprocket 808 are connected by a transmission chain 809, and a chain tensioning assembly 810 is provided inside the traction housing 100 in conjunction with the transmission chain 809;

[0055] A second driving pulley 811 is fixedly connected to the output shaft of the reducer 807, and a second driven pulley 812 is fixedly connected to the input shaft of the screw conveyor 400. The second driving pulley 811 and the second driven pulley 812 are connected by a second transmission belt 813.

[0056] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0057] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A tractor-mounted grain suction machine, comprising a tractor box (100), a grain suction mechanism (200), a negative pressure mechanism (300), a spiral grain elevator (400) and a grain storage bin (500), characterized in that: The traction machine box (100) is provided with the grain suction mechanism (200) on one side; The traction machine box (100) is internally provided with the negative pressure mechanism (300), the negative pressure mechanism (300) comprises a negative pressure bin (302) capable of generating negative pressure, the bottom of the negative pressure bin (302) is provided with a grain outlet (305), and the negative pressure bin (302) is connected with the grain suction mechanism (200) in a pipeline manner; The traction machine box (100) is fixedly connected with the spiral grain lifting machine (400), the bottom of the spiral grain lifting machine (400) is provided with a grain inlet (401), and the grain inlet (401) corresponds to the grain outlet (305); The traction machine box (100) is further rotatably connected with the grain storage bin (500), the grain storage bin (500) corresponds to the grain discharge outlet (402) of the spiral grain lifting machine (400), the traction machine box (100) is rotatably connected with the turnover oil cylinder (700), and the turnover oil cylinder (700) is rotatably connected with the grain storage bin (500); The traction machine box (100) is rotatably connected with a power shaft (801), and the power shaft (801) is connected with the negative pressure mechanism (300) and the spiral grain lifting machine (400) in a power manner.

2. A trailed grain suction machine according to claim 1, characterised in that: The grain suction mechanism (200) comprises a mechanism arm (201), a folding oil cylinder (202), a grain suction cover (203), a roller (204) and a first elastic component (205), one side of the traction machine box (100) is rotatably connected with the mechanism arm (201), at least two groups of the grain suction cover (203) are fixedly connected to the mechanism arm (201), the bottom of each group of the grain suction cover (203) is rotatably connected with the roller (204), the first elastic component (205) is arranged on the grain suction cover (203) in cooperation with the roller (204), and the grain suction cover (203) is connected with the negative pressure bin (302) in a pipeline manner; The traction machine box (100) is rotatably connected with the folding oil cylinder (202), and the folding oil cylinder (202) is rotatably connected with the mechanism arm (201).

3. A trailed grain harvester as claimed in claim 2, characterised in that: The bottom of the grain suction cover (203) is rotatably connected with a rotating arm (206), and the rotating arm (206) is rotatably connected with the roller (204); The first elastic component (205) comprises a first spring (2051), a first mounting frame (2052), and a first moving arm (2053), the suction grain cover (203) is fixedly connected with the first mounting frame (2052), the first mounting frame (2052) is provided with a first moving hole (2054), the first moving arm (2053) penetrates through the first moving hole (2054), one end of the first moving arm (2053) is rotationally connected with the rotating arm (206), the first moving arm (2053) is provided with a first limiting disc (2055), the first spring (2051) is sleeved on the first moving arm (2053), one end of the first spring (2051) abuts against the first mounting frame (2052), and the other end abuts against the first limiting disc (2055).

4. A trailed grain harvester as claimed in claim 3, characterised in that: The mechanism arm (201) comprises a driving arm (2011) and a passive arm (2012), the driving arm (2011) is rotationally connected with the traction machine box (100), and the folding oil cylinder (202) is rotationally connected with the driving arm (2011). One end of the driving arm (2011) is rotationally connected with the passive arm (2012), the driving arm (2011) and the bottom of the passive arm (2012) are fixedly connected with the suction grain cover (203), and the second elastic component (207) is arranged between the driving arm (2011) and the passive arm (2012).

5. A trailed grain harvester as claimed in claim 4, characterised in that: The second elastic component (207) comprises a second spring (2071), a second mounting frame (2072), and a second moving arm (2073), the driving arm (2011) is fixedly connected with the second mounting frame (2072), the second mounting frame (2072) is provided with a second moving hole, the second moving arm (2073) penetrates through the second moving hole, the second moving arm (2073) is rotationally connected with the passive arm (2012), the second moving arm (2073) is fixedly connected with a second limiting disc (2074), the second spring (2071) is sleeved on the second moving arm (2073), one end of the second spring (2071) abuts against the second limiting disc (2074), and the other end abuts against the second mounting frame (2072).

6. A trailed grain harvester as claimed in claim 2, characterised in that: The negative pressure mechanism (300) further comprises a negative pressure fan (301) and a fan baffle (303), the negative pressure fan (301) and a negative pressure bin (302) are fixedly connected inside the traction machine box (100), the negative pressure bin (302) is provided with a suction port (304) near the top thereof, the bottom of the negative pressure bin (302) is provided with an inclined surface (306) near the grain outlet (305), the air inlet of the negative pressure fan (301) is fixedly connected with the suction port (304), the negative pressure bin (302) is fixedly connected with the fan baffle (303) corresponding to the suction port (304), and the top of the fan baffle (303) is provided with an air inlet (307).

7. A trailed grain harvester as claimed in claim 6, characterised in that: The power shaft (801) is fixedly connected with a first driving pulley (802), the fan shaft of the negative pressure fan (301) is fixedly connected with a first driven pulley (803), the first driving pulley (802) and the first driven pulley (803) are connected through a first transmission belt (804), and the traction machine box (100) is further provided with a belt tensioning assembly (805) matched with the first transmission belt (804).

8. A trailed grain harvester as claimed in claim 7, characterised in that: The power shaft (801) is fixedly connected with a driving sprocket (806), the traction machine box (100) is fixedly connected with a speed reducer (807), the input shaft of the speed reducer (807) is fixedly connected with a driven sprocket (808), the driving sprocket (806) and the driven sprocket (808) are connected through a transmission chain (809), and the traction machine box (100) is provided with a chain tensioning assembly (810) matched with the transmission chain (809). The output shaft of the speed reducer (807) is fixedly connected with a second driving pulley (811), the input shaft of the spiral material lifting machine (400) is fixedly connected with a second driven pulley (812), and the second driving pulley (811) and the second driven pulley (812) are connected through a second transmission belt (813).

9. A trailed grain harvester as claimed in claim 1, characterised in that: The traction machine box (100) is fixedly connected with a traction suspension connecting frame (101).

10. A trailed grain harvester as claimed in claim 6, characterised in that: The fan baffle (303) adopts an inverted trapezoidal structure.

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