A mechanical-pneumatic combined plot breeding and seeding experimental device for maize

Abstract

This invention discloses a mechanical-pneumatic combined plot breeding seed metering test device for maize, comprising a seed metering device, a seed metering roller rotation drive mechanism, and a seed box baffle rotation drive mechanism. The seed metering device includes a seed metering roller, a roller cover, a fan, a seed metering central shaft, a seed box, and a seed box baffle. The outer circumference of the seed metering roller has multiple equally spaced seed metering holes. The roller cover is located on the open side of the seed metering roller and is rotatably connected. The roller cover has an air intake hole, and the fan is connected to the air intake hole via a flexible hose. The seed metering central shaft passes through the roller cover and is rotatably connected to it, and is fixedly connected to the seed metering roller. The axle of the rear caster is driven by the seed metering central shaft through the seed metering roller rotation drive mechanism. One side of the seed box is installed above the roller cover. The seed box baffle is rotatably connected to the seed metering central shaft and located below the seed box. The seed box baffle rotation drive mechanism is driven by the seed box baffle. This invention can improve work efficiency.

Description

Technical Field

[0001] This invention relates to the field of maize planting experiment technology, and more specifically to a maize mechanical-pneumatic combined plot breeding and seeding experiment device. Background Technology

[0002] Corn is one of the three major food crops, second only to rice and wheat in total planting area, and its role in food production is becoming increasingly important. Modernized corn breeding experiments are a key factor in the success of breeding new varieties; therefore, research on mechanized corn breeding technology is receiving increasing attention.

[0003] Regional breeding trials are conducted according to standardized requirements to comprehensively evaluate the yield, adaptability, stress resistance, and quality of newly bred varieties. Based on the performance of varieties in regional trials, combined with the results of stress resistance evaluation and quality assessment, a comprehensive evaluation of varieties is carried out. This serves as a scientific basis for evaluating varieties and an important basis for the scientific layout of varieties for approval and promotion.

[0004] However, current plot breeding test devices have some problems. For example, patent number CN202310212421.X proposes a precision seeder suitable for maize breeding plot tests. It features multiple storage boxes that can automatically control individual seeding, allowing for flexible use during sowing. The storage boxes can be cleaned to prevent seeds from the previous variety from mixing in after a seed change, and it also prevents clogging during sowing, improving efficiency. However, cleaning the seeds requires disassembling the storage boxes, making continuous operation impossible. (Patent number CN...) 202410252204.8 proposed a pneumatic seed metering device and its seed metering method for small plot breeding. A seed-feeding tube is fixed at the right end of the front plate. The seed chamber is connected to the lower end of the seed-feeding tube. The seed chamber is wedge-shaped with an opening at the rear end. The rear end of the seed chamber slides in contact with the front end of the seed metering tray. The front side of the seed chamber can be opened to allow excess seeds in the seed chamber to be discharged. This effectively solves the problem of missed sowing that often occurs in small plot breeding when there are few experimental seeds. Seed cleaning and seed replacement do not affect each other, improving sowing accuracy and making the passages between adjacent plots neat. However, the remaining seeds are not treated.

[0005] Therefore, providing an efficient mechanical-pneumatic combined plot breeding and seeding experimental device for maize is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0006] In view of this, the present invention provides a maize mechanical-pneumatic combined plot breeding and seeding test device to at least solve one of the aforementioned technical problems.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A mechanical-pneumatic combined plot breeding seed metering experimental device for maize includes a frame and front and rear casters mounted on the frame. It also includes a seed metering device, a seed metering roller rotation drive mechanism, and a seed box baffle rotation drive mechanism. The seed metering device includes a seed metering roller, a roller cover, a fan, a seed metering central shaft, a seed box, and a seed box baffle. The outer circumference of the seed metering roller has multiple equally spaced seed metering holes. The roller cover is located on the open side of the seed metering roller and is rotatably connected. The roller cover has an air intake hole. The fan and... The air intake hole is connected via a flexible hose; the roller cover is mounted on the frame via a fixing plate; the seed metering shaft passes through the roller cover and is rotatably connected to it, and the seed metering shaft is fixedly connected to the seed metering roller; the axle of the rear caster is driven by the seed metering shaft via the seed metering roller rotation drive mechanism; one side of the seed box is mounted above the roller cover; the seed box baffle is rotatably connected to the seed metering shaft and located below the seed box; the seed box baffle rotation drive mechanism is driven by the seed box baffle.

[0009] By adopting the above technical solutions, the beneficial effects of the present invention are as follows:

[0010] It can promptly remove remaining seeds in the area between two plots without shutting down the machine between plots, thus improving the efficiency of the experiment.

[0011] Furthermore, two partitions are fixed between the roller cover and the opposite side of the seed metering roller and the roller cover, which are distributed circumferentially to divide the inner cavity of the seed metering roller into a seed suction chamber and a seed feeding chamber; the roller cover has an air inlet hole, and the air suction hole is connected to the seed suction chamber, and the air inlet hole is connected to the seed feeding chamber.

[0012] Furthermore, the seed box baffle rotation drive mechanism includes an air pump, an air cylinder, a rack, and a gear. The air pump and the air cylinder are both mounted on the frame, and the air pump is connected to the cylinder body via an air pipe. The rack is fixed to the telescopic rod of the air cylinder. The gear is rotatably connected to the seed dispensing shaft, and the gear meshes with the rack. The gear is fixedly connected to the seed box baffle.

[0013] The beneficial effect of adopting the above-mentioned further technical solution is that, driven by the cylinder, the rack moves horizontally, drives the gear to rotate, thereby causing the seed box baffle fixedly connected to it to rotate at a certain angle, thus removing the obstruction to the seed box outlet and realizing the leakage and removal of the remaining seeds in the seed box.

[0014] Furthermore, the seeding roller rotation drive mechanism includes a first sprocket, a second sprocket, and a first chain. The first sprocket is fitted and fixed on the seeding central shaft; the second sprocket is fitted and fixed on the shaft of the rear caster; the first sprocket and the second sprocket are connected by the first chain drive.

[0015] The beneficial effect of adopting the above-mentioned further technical solution is that the seed metering roller rotates as the rear caster moves.

[0016] Furthermore, each of the seed dispensing hole groups includes three seed dispensing holes that are equally spaced along the radial direction of the seed dispensing roller.

[0017] The beneficial effect of adopting the above-mentioned further technical solution is to achieve the sowing of three seeds in one seed hole.

[0018] Furthermore, the bottom of the seed box baffle is inclined at 45°.

[0019] The beneficial effect of adopting the above-mentioned further technical solution is that it enables the population to have good mobility, and the seeds will continue to move towards the outer circle due to their own gravity, which is conducive to seed filling.

[0020] Furthermore, the circumferential angle of the seed-feeding cavity is 45°.

[0021] Furthermore, the aforementioned mechanical-pneumatic combined plot breeding and seed metering experimental device for corn also includes a seed changing device. This device comprises a support shaft, a fixed cone disc, a moving cone disc, a third sprocket, a servo motor, a fourth sprocket, and a second chain. The top end of the support shaft is fixedly connected to the frame. The fixed cone disc is located at the top of the seed box and fixedly connected to the bottom end of the support shaft. The fixed cone disc has a discharge hole corresponding to the position of the inlet hole in the seed box. The moving cone disc is mounted on the support shaft and rotatably connected to it, and is located at the top of the fixed cone disc. The moving cone disc has multiple feeding holes along its circumference, thereby forming multiple seed chambers between the multiple feeding holes and the top wall of the fixed cone disc. The third sprocket is fixedly mounted on the moving cone disc. The servo motor is mounted on the frame. The fourth sprocket is mounted on the output shaft of the servo motor. The third sprocket and the fourth sprocket are connected by a second chain drive.

[0022] The beneficial effect of adopting the above-mentioned further technical solution is that multiple varieties can be stored in multiple seed chambers without the need for manual addition of new varieties of seeds multiple times, and the varieties can be changed in a timely manner in the area between two plots.

[0023] Furthermore, the aforementioned mechanical-pneumatic combined plot breeding and seeding test device for corn also includes a seed collection box, which is located directly below the seed box and is fixedly connected to the rack.

[0024] The beneficial effects of adopting the above-mentioned further technical solution are that the remaining seeds can be collected in the middle area between the two plots without falling to the ground, and the use of a gear and rack mechanism with the seed box baffle improves the synchronization of the seed cleaning process.

[0025] Furthermore, the frame includes a front beam, a rear beam, and a height adjustment frame. The rear beam includes a crossbeam and a longitudinal beam. One end of the crossbeam is mounted to the middle of the rear of the front beam via U-bolts, and the other end of the crossbeam is mounted with a rear caster via a pivot. The top of the support shaft is fixedly connected to the crossbeam. The top of the longitudinal beam is fixed to the crossbeam, and a furrow opener is mounted at the bottom of the longitudinal beam. The seed metering device, the seed changing device, and the remaining seed collection box are all located between the crossbeam and the furrow opener. A cylinder support is provided at the bottom of the longitudinal beam near the furrow opener, and the cylinder is mounted on the cylinder support. The top of the height adjustment frame is mounted to the front beam via U-bolts, and the front caster is mounted at the bottom of the height adjustment frame. A motor support is provided on the rear side of the front beam, and the servo motor is mounted on the motor support. The fan and the air pump are both mounted on the front beam. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0027] Figure 1 The attached figure is a schematic diagram of the overall structure of a maize mechanical-pneumatic combined plot breeding and seeding test device provided by the present invention.

[0028] Figure 2 The attached figure is a schematic diagram of the seed metering device provided by the present invention;

[0029] Figure 3 The attached figure is a schematic diagram of the structure of the inner cavity of the seed metering drum provided by the present invention;

[0030] Figure 4 The attached figure is an exploded view of the seed-changing device provided by the present invention;

[0031] Figure 5 The attached figure is a schematic diagram of the structure of the frame provided by the present invention;

[0032] Figure 6 The attached figure is a schematic diagram of the sowing state of a maize mechanical-pneumatic combined plot breeding and seeding test device provided by the present invention;

[0033] Figure 7 The attached figure is a schematic diagram of the seed cleaning state of a maize mechanical-pneumatic combined plot breeding seed metering test device provided by the present invention;

[0034] Figure 8 The attached figure is a schematic diagram of the seed adsorption state of the seed metering device provided by the present invention. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] like Figure 1-8 As shown, this invention discloses a mechanical-pneumatic combined plot breeding seed metering test device for maize, including a frame 1, front casters 2 and rear casters 3 mounted on the frame 1, a seed metering device 4, a seed metering drum rotation drive mechanism 5, and a seed box baffle rotation drive mechanism 6. The frame 1 is suspended from a tractor via a suspension frame 7, and the tractor's average forward speed is 1 m / s. The seed metering device 4 includes a seed metering drum 41, a drum cover 42, a fan 43, a seed metering central shaft 44, a seed box 45, and a seed box baffle 46. The outer circumference of the seed metering drum 41 has multiple equally spaced seed metering hole groups 411; the drum cover 42 is located on the open side of the seed metering drum 41 and is rotatably connected, i.e. The roller cover 42 does not rotate with the seed metering roller 41; the roller cover 42 has an air intake hole 421, and the fan 43 is connected to the air intake hole 421 via a hose 47; the roller cover 42 is mounted on the frame 1 via a fixing plate 48; the seed metering shaft 44 passes through the roller cover 42 and is rotatably connected to it, and the seed metering shaft 44 is fixedly connected to the seed metering roller 41; the shaft 31 of the rear caster 3 is connected to the seed metering shaft 44 via a seed metering roller rotation drive mechanism 5; one side of the seed box 45 is mounted on the upper side of the roller cover 42; the seed box baffle 46 is rotatably connected to the seed metering shaft 44 and located below the seed box 45; the seed box baffle rotation drive mechanism 6 is connected to the seed box baffle 46. This invention can promptly remove remaining seeds in the area between two plots without stopping the machine between plots, achieving the removal of excess seeds without stopping the machine between plots, thus improving the efficiency of the experiment.

[0037] Specifically, two partitions 49 are fixed between the roller cover 42 and the seed metering roller 41 on the opposite side of the roller cover 42, which are distributed circumferentially to divide the inner cavity of the seed metering roller 41 into a seed suction chamber 412 and a seed feeding chamber 413; the roller cover 42 has an air inlet 422, and the air suction hole 421 is connected to the seed suction chamber 412, and the air inlet 422 is connected to the seed feeding chamber 413.

[0038] Specifically, the seed box baffle rotation drive mechanism 6 includes an air pump 61, an air cylinder 62, a rack 63, and a gear 64. The air pump 61 and the air cylinder 62 are both mounted on the frame 1, and the air pump 61 and the cylinder body of the air cylinder 62 are connected by an air pipe. In this embodiment, the air pipe is a polyurethane air pipe, and the air pump 61 is a vortex air pump. The rack 63 is fixed on the telescopic rod of the air cylinder 62. The gear 64 is rotatably connected to the seed metering shaft 44, and the gear 64 is meshed with the rack 63. The gear 64 is fixedly connected to the seed box baffle 46. Thus, under the drive of the air cylinder 62, the rack 63 moves horizontally, driving the gear 64 to rotate, thereby driving the seed box baffle 46 fixedly connected to it to rotate a certain angle, losing its obstruction of the outlet of the seed box 45, and realizing the leakage and removal of the remaining seeds in the seed box 45.

[0039] Specifically, the seed metering roller rotation drive mechanism 5 includes a first sprocket 51, a second sprocket 52, and a first chain 53. The first sprocket 51 is fitted and fixed on the seed metering central shaft 44; the second sprocket 52 is fitted and fixed on the rotating shaft 31 of the rear caster 3; the first sprocket 51 and the second sprocket 52 are connected by the first chain 53, thereby realizing that the seed metering roller 41 rotates as the rear caster 3 moves.

[0040] Specifically, each seed metering hole group 411 includes three seed metering holes that are equally spaced along the radial direction of the seed metering roller 41, so as to achieve the sowing of three seeds in one seed hole.

[0041] Specifically, the bottom of the seed box baffle 46 is tilted at 45°, which allows the seed population to have good mobility. Due to their own gravity, the seeds will continue to move towards the outer circle, which is conducive to filling the seed box.

[0042] Specifically, the circumferential angle of the seed-injection cavity 413 is 45°.

[0043] Specifically, a maize mechanical-pneumatic combined plot breeding and seed metering experimental device also includes a seed changing device 8. The seed changing device 8 includes a support shaft 81, a fixed cone disc 82, a moving cone disc 83, a third sprocket 84, a servo motor 85, a fourth sprocket 86, and a second chain 87. The top of the support shaft 81 is fixedly connected to the frame 1. The fixed cone disc 82 is located on top of the seed box 45 and is fixedly connected to the bottom of the support shaft 81. The fixed cone disc 82 has a discharge hole 821 corresponding to the position of the inlet hole of the seed box 45. The moving cone disc 83 is fitted onto the support shaft 81 and rotatably connected to it, and is located on top of the fixed cone disc 82. The moving cone disc 83 has multiple discharge holes along its circumference. The feed holes 831 form multiple seed chambers between the feed holes 831 and the top wall of the fixed cone plate 82. In this embodiment, there are 8 seed chambers, and the circumferential angle of each seed chamber area is 30°. The moving cone plate 83 rotates 45° every 4 seconds. The third sprocket 84 is fixedly mounted on the moving cone plate 83. The servo motor 85 is mounted on the frame 1. The fourth sprocket 86 is mounted on the output shaft of the servo motor 85. The third sprocket 84 and the fourth sprocket 86 are connected by a second chain 87, so that multiple varieties can be stored in multiple seed chambers without the need for manual addition of new varieties of seeds multiple times, and the varieties can be changed in a timely manner in the area between two plots.

[0044] Specifically, a maize mechanical-pneumatic combined plot breeding and seeding test device also includes a surplus seed collection box 9, which is located directly below the seed box 45 and is fixedly connected to the rack 63. This allows the surplus seeds to be collected in the middle area between two plots without falling to the ground. Furthermore, the device uses a gear and rack mechanism with the seed box baffle 46, which improves the synchronization of the seed cleaning process.

[0045] Specifically, the frame 1 includes a front beam 11, a rear beam 12, and a height adjustment frame 13. The rear beam 12 includes a crossbeam 121 and a longitudinal beam 122. One end of the crossbeam 121 is installed at the middle of the rear of the front beam 11 via U-bolts 14, and the other end of the crossbeam 121 is equipped with a rear caster 3 via a pivot 31. The top of the support shaft 81 is fixedly connected to the crossbeam 121. The top of the longitudinal beam 122 is fixed to the crossbeam 121, and the bottom of the longitudinal beam 122 is equipped with a furrow opener 10. The machine also includes a seed metering device 4, a seed changing device 8, and... All collection boxes 9 are located between the crossbeam 121 and the trencher 10; the bottom of the longitudinal beam 122 is provided with a cylinder support 1221 near the trencher 10, and the cylinder 62 is installed on the cylinder support 1221; the top of the height adjustment frame 13 is installed on the front beam 11 of the frame by U-bolts 14, and the front caster 2 is installed at the bottom of the height adjustment frame 13; a motor support 111 is provided on the rear side of the front beam 11 of the frame, and the servo motor 85 is installed on the motor support 111; the fan 43 and the air pump 61 are both installed on the front beam of the frame.

[0046] The working principle of this invention is as follows:

[0047] During sowing, the drive fan 43 and air pump 61 work, the gas in cylinder 62 is compressed, driving the telescopic rod to move, and the seed collection device 9 leaves the seed metering device 4 seeding area. At the same time, the rack 63 moves to drive the gear 64 to rotate, so that the seed box baffle 46 rotates to the bottom of the seed box 45 and closes the opening of the seed box 45. At the same time, the tractor moves forward and drives the rear caster 3 to rotate, driving the seed metering roller 41 to rotate through the first chain 53, the first sprocket 51 and the second sprocket 52. The air in the seed suction chamber 412 is compressed, and the seeds in the seed box 45 are attracted by the suction force and are attracted to the seed metering hole 4111. They are transported to the seeding chamber 413 along the hole (seed metering hole 4111) on the roller wall of the seed metering roller 41. After the seeds are transported to the seeding chamber 413, since the seeding chamber 413 has an air inlet connected to the air 422, there is no pressure difference in the seeding chamber 413. Therefore, the seeds lose the suction force and fall only under the action of gravity and the force of the cylinder wall.

[0048] After the sowing work in this plot is completed, when entering the area between the two plots, the blower 43 and the air pump 61 are turned off, and air enters the seed suction chamber 412. The pressure in the seed suction chamber 412 returns to atmospheric pressure, and the seeds on the seed dispensing roller 41 fall due to the loss of pressure difference and the continuous rotation of the seed dispensing roller 41. At the same time, there is no pressure difference in the cylinder 62, the telescopic rod is reset, the seed box baffle 46 moves away from the bottom of the seed box 45, the seed box 45 opens, and the remaining seeds fall due to their own gravity. At the same time, the remaining seed collection device 9 moves to the area below the seed dispensing device 4 to collect the fallen remaining seeds. When leaving the area between the two plots, the servo motor 85 drives the moving cone 83 to rotate a certain angle through the second chain 87, the third sprocket 84 and the fourth sprocket 86, so that the seeds of the next variety in the next seeding chamber enter the discharge hole 821. After the work of clearing out all the excess seeds in the seed dispensing device 4 and the seeds of the next variety enter the seed box 45 is completed, the blower 43 and the air pump 61 are driven again to work, and the operation is repeated.

[0049] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0050] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A mechanical-pneumatic combined plot breeding and seeding experimental device for maize, comprising a frame and front and rear casters mounted on the frame, characterized in that, It also includes a seed metering device, a seed metering roller rotation drive mechanism, and a seed box baffle rotation drive mechanism. The seed metering device includes a seed metering roller, a roller cover, a fan, a seed metering central shaft, a seed box, and a seed box baffle. The outer circumference of the seed metering roller has multiple equally spaced seed metering hole groups. The roller cover is located on the open side of the seed metering roller and is rotatably connected. The roller cover has an air intake hole, and the fan is connected to the air intake hole via a hose. The roller cover is mounted on the frame via a fixing plate. The seed metering central shaft passes through the roller cover and is rotatably connected to it, and the seed metering central shaft is fixedly connected to the seed metering roller. The axle of the rear caster is driven by the seed metering central shaft through the seed metering roller rotation drive mechanism. One side of the seed box is installed above the roller cover. The seed box baffle is rotatably connected to the seed metering central shaft and located below the seed box. The seed box baffle rotation drive mechanism is driven by the seed box baffle. The seed box baffle rotation drive mechanism includes an air pump, an air cylinder, a rack, and a gear. The air pump and the air cylinder are both mounted on the frame, and the air pump is connected to the cylinder body via an air pipe. The rack is fixed to the telescopic rod of the air cylinder. The gear is rotatably connected to the seed dispensing shaft, and the gear meshes with the rack. The gear is fixedly connected to the seed box baffle. The aforementioned mechanical-pneumatic combined plot breeding and seeding test device for corn also includes a seed collection box, which is located directly below the seed box and is fixedly connected to the rack.

2. The maize mechanical-pneumatic combined plot breeding and seeding experimental device according to claim 1, characterized in that, Two partitions are fixed between the roller cover and the opposite side of the seed metering roller and the roller cover, which are distributed circumferentially to divide the inner cavity of the seed metering roller into a seed suction chamber and a seed feeding chamber; the roller cover has an air inlet hole, and the air suction hole is connected to the seed suction chamber and the air inlet hole is connected to the seed feeding chamber.

3. The maize mechanical-pneumatic combined plot breeding and seeding experimental device according to claim 1, characterized in that, The seeding roller rotation drive mechanism includes a first sprocket, a second sprocket, and a first chain. The first sprocket is fitted and fixed on the seeding central shaft; the second sprocket is fitted and fixed on the shaft of the rear caster; the first sprocket and the second sprocket are connected by the first chain drive.

4. The maize mechanical-pneumatic combined plot breeding and seeding experimental device according to claim 1, characterized in that, Each seed metering hole group includes three seed metering holes that are equally spaced along the radial direction of the seed metering roller.

5. The maize mechanical-pneumatic combined plot breeding and seeding experimental device according to claim 1, characterized in that, The bottom of the seed box baffle is inclined at 45°.

6. The maize mechanical-pneumatic combined plot breeding and seeding experimental device according to claim 2, characterized in that, The circumferential angle of the seed-feeding chamber is 45°.

7. The maize mechanical-pneumatic combined plot breeding and seeding experimental device according to claim 1, characterized in that, The aforementioned mechanical-pneumatic combined plot breeding and seed metering experimental device for corn further includes a seed changing device. This device comprises a support shaft, a fixed conical disc, a movable conical disc, a third sprocket, a servo motor, a fourth sprocket, and a second chain. The top end of the support shaft is fixedly connected to the frame. The fixed conical disc is located at the top of the seed box and fixedly connected to the bottom end of the support shaft. The fixed conical disc has a discharge hole corresponding to the position of the inlet hole in the seed box. The movable conical disc is mounted on the support shaft and rotatably connected to it, and is located at the top of the fixed conical disc. The movable conical disc has multiple feeding holes along its circumference, thereby forming multiple seed chambers between the multiple feeding holes and the top wall of the fixed conical disc. The third sprocket is fixedly mounted on the movable conical disc. The servo motor is mounted on the frame. The fourth sprocket is mounted on the output shaft of the servo motor. The third sprocket and the fourth sprocket are connected by a second chain drive.

8. The maize mechanical-pneumatic combined plot breeding and seeding experimental device according to claim 7, characterized in that, The frame includes a front beam, a rear beam, and a height adjustment frame. The rear beam includes a crossbeam and a longitudinal beam. One end of the crossbeam is mounted to the middle of the rear of the front beam via U-bolts, and the other end of the crossbeam is mounted with a rear caster via a pivot. The top of the support shaft is fixedly connected to the crossbeam. The top of the longitudinal beam is fixed to the crossbeam, and a furrow opener is mounted at the bottom of the longitudinal beam. The seed metering device, the seed changing device, and the remaining seed collection box are all located between the crossbeam and the furrow opener. A cylinder support is provided at the bottom of the longitudinal beam near the furrow opener, and the cylinder is mounted on the cylinder support. The top of the height adjustment frame is mounted to the front beam via U-bolts, and the front caster is mounted at the bottom of the height adjustment frame. A motor support is provided on the rear side of the front beam, and the servo motor is mounted on the motor support. The fan and the air pump are both mounted on the front beam.

Images