A double-chain precision seed metering device based on a combination of photoelectric sensor and air blowing

Abstract

The present invention belongs to the technical field of agricultural machinery, and relates to a double-chain precision seeding device based on a photoelectric sensor and air blowing combination. The seeding device is mainly composed of a frame, a seed box, a seeding assembly and a detection and supplementary seeding device. The seeding assembly is composed of a microcontroller, a seeding unit, a unit mounting plate, a front transparent cover and a rear transparent cover. The seeding unit is composed of a chain groove, a transmission chain and a transmission sprocket. The detection and supplementary seeding device is composed of a fixed frame, a seed guide pipe, a photoelectric sensor, an air intake pipe and an electric control valve. The seeding amount is determined by determining the size of the chain link and the chain shaft, and the seeding speed is adjusted by controlling the rotation speed of the sprocket. The photoelectric sensor cooperates with the air blowing to supplement the seeding, and the chain link that is not filled with seeds is supplemented to achieve the purpose of continuous seeding. Through air blowing, the seeds are blown to the seeding tube for discharge. The present invention has a compact structure and a reasonable design, and can improve the problems of discontinuous seeding and slow seeding speed of the existing seeding device, and realize continuous sowing and precision sowing operations.

Description

Technical Field

[0001] The invention belongs to the technical field of agricultural machinery, and in particular relates to a double-chain precision seed metering device based on a combination of a photoelectric sensor and air blowing. Background Art

[0002] Precision seeding is a sowing method that sows crop seeds into the seed bed according to precise sowing amount, plant spacing, and sowing depth. Precision seeding has the following outstanding advantages, such as: saving seeds, uniform sowing, reasonable plant spacing, and increased yield. The key is a seeding device that can achieve high-speed and stable seeding. The performance of the device will be directly related to the quality and efficiency of sowing. The air-blown precision seeder can achieve more accurate sowing of large-particle seeds with a lower seed damage rate. The main working principle of the traditional air-blown precision seeder is that the seeds complete the seeding operation under the action of gravity and air pressure difference, but there are problems such as complex transmission system structure, slow seeding speed, high working noise, and high power consumption.

[0003] The chain designed by the "chain seed metering device" with patent number 201420346214.X is single, and the precision requirement for seeds falling is high. It cannot ensure that seeds fall accurately into the seed slot, which will cause missed sowing. At the same time, seeds fall freely by gravity during sowing, and it cannot avoid seeds getting stuck, so the uniformity of sowing cannot be guaranteed. In addition, there are other devices, such as the "universal pneumatic seed metering device for soybeans and corn" with patent number ZL200910206823.9, which is designed with a seed clearing spring that pushes seeds that have not automatically fallen through the through hole at the bottom of the shaped hole. When the seeding wheel is operating at high speed, it is easy for the seed clearing spring to not fully engage with the through hole at the bottom of the shaped hole, and the seeds stuck in the shaped hole will not fall, resulting in missed sowing.

[0004] In order to solve the problems of complex structure and slow seeding speed in the existing air-blown precision seeding device, it is necessary to design a high-speed precision seeding device with reasonable structure, high seeding speed and high versatility. Summary of the invention

[0005] The purpose of the present invention is to solve the problems of complex structure and slow seeding speed of the air-blown precision seed metering device described in the background technology, so as to achieve the effect of optimizing seeding, and to provide a double-chain precision seed metering device based on a photoelectric sensor and air blowing. The device is characterized in that the high-speed precision seed metering device is mainly controlled by an electric control system to drive the circular motion of the sprocket and chain driven by a motor, and the chain links of the adjacent two side chains rotate synchronously to form a seed cavity for seed transportation, and the photoelectric sensor identifies missed seeds and cooperates with air blowing to supplement seeds, and then air blowing seeding is carried out.

[0006] The frame (1) is composed of a frame front beam (101), a frame rear beam (102), a frame left beam (103), a frame right beam (104), a frame left front seed box support rod (105), a frame right front seed box support rod (106), a frame left rear seed box support rod (107), a frame right rear seed box support rod (108), a left motor fixing cylinder (109) and a right motor fixing cylinder (110). The front beam (101) of the frame, the rear beam (102) of the frame, the left beam (103) of the frame and the right beam (104) of the frame are on the same horizontal plane and form a "mouth" frame structure; the seed box support rod (105) on the left front side of the frame is vertically fixed to the front beam (101) of the frame and the left beam (103) of the frame, and the seed box support rod (106) on the right front side of the frame is vertically fixed to the front beam (101) of the frame and the right beam (104) of the frame. ), the seed box support rod (107) on the left rear side of the frame is vertically fixed to the frame rear beam (102) and the frame left beam (103), the seed box support rod (107) on the right rear side of the frame is vertically fixed to the frame rear beam (102) and the frame right beam (104), the seed box support rod (105) on the left front side of the frame, the seed box support rod (107) on the left rear side of the frame, the seed box support rod (106) on the right front side of the frame, and the seed box support rod (107) on the right rear side of the frame are vertically fixed to the frame rear beam (102) and the frame right beam (104). The side seed box support plate (108) is symmetrical on the left and right sides, and the seed box support rod (105) on the left front side of the frame, the seed box support rod (106) on the right front side of the frame, the seed box support rod (107) on the left rear side of the frame, and the seed box support plate (108) on the right rear side of the frame are symmetrical in front and back; the left motor fixing cylinder (109) and the right motor fixing cylinder (110) are cylindrical cylinders with an open upper end and a closed lower end, which are vertically fixed to the front beam of the frame and are symmetrical on the left and right sides.

[0007] The seed box (2) is composed of a seed box front baffle (201), a seed box rear baffle (202), a seed box left baffle (203), a seed box right baffle (204), a seed partition plate (205), a left baffle (206), and a right baffle (207); the seed box front baffle (201) and the seed box rear baffle (202) are symmetrical in front and back and perpendicular to the ground; the seed box left baffle (203) and the seed box right baffle (204) are symmetrical in left and right and perpendicular to the ground; the left baffle (206) and the right baffle (207) are symmetrical in left and right and inclined at a certain angle to the ground; The front baffle plate (201) of the seed box, the rear baffle plate (202) of the seed box, the left baffle plate (203) of the seed box and the right baffle plate (204) of the seed box are fixed together to form a box body with a hollow top and bottom; the front baffle plate (201) of the seed box, the rear baffle plate (202) of the seed box, the left baffle plate (206) and the right baffle plate (207) are fixed together to form a hollow convex platform; the seed partition plate (205) is a "convex" curved plate, which is low at the front and back and high in the middle, and is located at the center bottom of the box body. The edge of the seed partition plate (205) is connected with the left baffle plate (206) and the right baffle plate (207). The inner surfaces intersect, and a rectangular space is left with the inner surfaces of the front baffle plate (201) and the rear baffle plate (202) of the seed box. The seed partition plate (205) is also provided with a circular seed supplement opening (208), which are, from left to right, the first seed supplement opening (2081), the second seed supplement opening (2082), and the third seed supplement opening (2083). The three seed supplement openings are perpendicular to the ground and penetrate the seed partition plate (205). The lower surface of the seed partition plate (205) coincides with the lower surface of the front baffle plate (201) and the rear baffle plate (202) of the seed box. The height of the seed partition plate (205) is The upper surface of the left middle baffle (206) overlaps with the lower surface of the left baffle (203) of the seed box, and the upper surface of the right middle baffle (207) overlaps with the lower surface of the right baffle (204) of the seed box; the front baffle (201) of the seed box, the rear baffle (202) of the seed box, the left baffle (203) of the seed box, and the right baffle (204) of the seed box are fixed to the seed box support rod (105) on the left front side of the frame, the seed box support rod (106) on the right front side of the frame, the seed box support rod (107) on the left rear side of the frame, and the seed box support rod (108) on the right rear side of the frame by welding.

[0008] The seeding assembly is composed of a unit mounting plate (3), a front transparent cover (4), a rear transparent cover (5), a microcontroller (6) and four seeding units; the unit mounting plate (3) is composed of a lower base plate (301), a left baffle plate (302), a right baffle plate (303) and a microcontroller fixing plate (304); the outer edge of the lower base plate (301) is rectangular and kept horizontal with the ground, and four straight slots with holes are evenly distributed in the horizontal direction; the left baffle plate (302) and the right baffle plate (303) are vertically fixed to the lower base plate (301); the lower bottom surfaces of the left baffle plate (302) and the right baffle plate (303) coincide with the upper surface of the lower base plate (301); ... The left side baffle (302) and the right side baffle (303) are symmetrical, the microcontroller fixing plate (304) is vertically fixed on the lower base plate (301), the upper surface of the microcontroller fixing plate (304) coincides with the lower surface of the lower base plate (301), the rear surface of the microcontroller fixing plate (304) coincides with the rear surface of the lower base plate (301) and is located at the center, the left side baffle (302) and the right side baffle (303) are respectively fixed to the seed box support rod (105) on the left front side of the frame, the seed box support rod (106) on the right front side of the frame, the seed box support rod (107) on the left rear side of the frame, and the seed box support rod (108) on the right rear side of the frame, so that the upper surface of the unit mounting plate (3) is parallel to the lower surface of the seed box (2).

[0009] The front transparent cover shell (4) is composed of an upper top plate (401) and a front baffle plate (402); the upper top plate (401) and the front baffle plate (402) are vertically fixedly connected; the front transparent cover shell (4) is vertically fixedly connected to the unit mounting plate (3); the lower surface of the front baffle plate (402) coincides with the upper surface of the unit mounting plate (3); the right surface of the front baffle plate (402) coincides with the right surface of the unit mounting plate (3); and the front surface of the front baffle plate (402) coincides with the front surface of the unit mounting plate (3).

[0010] The rear transparent cover shell (5) is composed of an upper top plate (501) and a rear baffle plate (502); the upper top plate (501) and the rear baffle plate (502) are vertically fixedly connected; the front transparent cover shell (5) is vertically fixedly connected to the unit mounting plate (3); the lower surface of the front baffle plate (502) coincides with the upper surface of the unit mounting plate (3); the right surface of the front baffle plate (502) coincides with the right surface of the unit mounting plate (3); and the rear surface of the front baffle plate (502) coincides with the rear surface of the unit mounting plate (3).

[0011] The microcontroller (6) is fixedly connected in parallel to the microcontroller fixing plate (304), the lower surface of the microcontroller (6) overlaps with the front surface of the microcontroller fixing plate (304), and the microcontroller (6) is installed at the center of the microcontroller fixing plate (304).

[0012] The seeding unit is composed of a chain groove (7), a sprocket (8), a transparent baffle (9) and a chain (10). There are four of them from left to right, namely a first seeding unit, a second seeding unit, a third seeding unit and a fourth seeding unit, which are sequentially mounted in four hollow straight groove openings of the unit mounting plate (3). The chain groove (7) is in the shape of a straight groove cylinder with a closed upper surface and a hollow lower surface. A transmission chain groove (701), a chain shaft groove (702), a sprocket groove (703), a rectangular hole (704), a reseeding circular hole (705) and a rotating circular groove (706) are formed on the chain groove (7). The transmission chain groove (701) is horizontally distributed around the outer wall of the chain groove (7), has a width that does not penetrate the outer wall of the chain groove (7) and is lower in height than the outer wall of the chain groove (7). The chain shaft groove (702) is horizontally distributed around the outer wall of the chain groove (7), has a height higher than the transmission chain groove (701). The groove (701) is narrower in width than the transmission chain groove (701); the sprocket groove (703) is opened on the front semicircular wall of the chain groove (7) and penetrates through it, and its height is lower than that of the transmission chain groove (701); the rectangular holes (704) are opened on the vertical outer wall of the chain groove (7), and three of them are evenly distributed and penetrate through it, namely, the first rectangular hole (7041), the second rectangular hole (7042), and the third rectangular hole (7043); the horizontal center planes of the transmission chain groove (701), the chain shaft groove (702), the sprocket groove (703) and the rectangular hole (704) coincide with each other; the vertical center lines of the cross sections of the transmission chain groove (701) and the chain shaft groove (702) coincide with each other; the reseeding circular hole (705) is opened on the upper wall plate of the chain groove (7) and penetrates through it; the reseeding circular hole (705) is tangent to the inner surface of the left vertical wall of the chain groove (7); and the rotating circular groove (706) is opened on the lower surface of the upper wall plate of the chain groove (7) and does not penetrate through it.

[0013] The sprocket (8) is composed of a sprocket disc (801) and a sprocket shaft (802); the upper surface and lower surface of the sprocket disc (801) respectively coincide with the upper surface and lower surface of the sprocket groove (703); the sprocket shaft (802) and the rotating circular groove (706) are coaxial and their upper surfaces coincide; the transparent baffle (9) is rectangular and is mounted on the rectangular hole (704) according to working requirements.

[0014] The transparent baffle (9) is rectangular and is installed on the rectangular hole (704) according to work requirements.

[0015] The chain is composed of a chain link (10) connected by a chain link 1 (101) and a chain link 2 (102) to form a straight groove. The left and right chain axes of the chain link 1 (101) are longer than the upper and lower surfaces of the chain link 1 (101) and are symmetrical in the upper and lower directions. The chain link 2 (102) is fixedly connected to a sowing plate on one side of the left and right chain axes. The sowing plate extends outwardly perpendicular to the horizontal plane to the outer surface of the chain link 2 (102). The upper and lower surfaces of the chain axis in the chain coincide with the upper and lower surfaces of the chain axis groove (702) respectively, and the outer surface of the chain axis is tangent to the left and right surfaces of the chain axis groove (702) and slides along the chain axis groove (702).

[0016] The inspection and supplementary rowing device is composed of a fixed frame (11), a seed guide tube (12), a photoelectric sensor (13), an air inlet pipe (14) and an electric control valve. The fixed frame (11) is in a "T" shape, and its upper surface is fixedly connected to the lower surface of the upper wall plate of the chain groove (7). A first air blowing port (1101) is opened at the center of the horizontal rod, and a second air blowing port (1102) is opened on the right side of the first air blowing port (1101). The second air blowing port (1102) extends a circular tube of a certain length to the left. Electric control valves are arranged inside the two air blowing holes, and the electric control valves are respectively connected to the microcontroller (6) through electric wires. The seed guide tube (12) is in a "T"-shaped tube as a whole, and the upper port is a circular tube that coincides with the supplementary seeding port of the seed partition plate (205). The left port is a rectangular tube. When installed, The photoelectric sensor (13) is mounted on the fixing frame (11) and is located on the same horizontal plane as the first air blowing port (1101) and the second air blowing port (1102). The photoelectric sensor (13) is located on the left side of the first air blowing port (1101). The sensing port of the photoelectric sensor (13) is aligned with the first rectangular hole (7041). The air inlet pipe (14) has three ports, namely a front port (1401), a rear port (1402) and a lower port (1403). The front port (1401) coincides with the right side of the first air blowing port (1101), and the rear port (1402) coincides with the right side of the second air blowing port (1102).

[0017] The belt transmission mechanism (15) is composed of a V-belt (1501) and two pulleys (1502). The V-belt (1501) and the pulleys (1502) are used in conjunction with each other. The pulleys (1502) are respectively fixed to two sprocket shafts (802) spaced apart from each other. The pulleys (1502) are coaxial with the sprocket shafts (802).

[0018] There are two motors (16) in total, which are connected to the two middle sprocket shafts (802) through couplings respectively. The two motors are fixed in the left motor fixing cylinder (109) and the right motor fixing cylinder (110). The motors are connected to the microcontroller (6) through wires and a motor controller.

[0019] The air delivery pipe (17) is tubular in shape as a whole and is provided with an air inlet and three air outlets. The air inlet is connected to an external air blowing device, and the three air outlets are respectively overlapped and fixedly connected to the lower ports (1403) of the three air inlet pipes (14) of the seeding assembly. The seeding pipe (18) is in the shape of a right-angle cylinder and is vertically fixedly connected to the chain groove (7). The right port of the seeding pipe (18) is externally connected to the third rectangular hole (7043).

[0020] The working principle of the present invention is that when seeds are poured into the seed box 2, the seeds at the bottom of the seed box are divided into the front and rear sides by the seed partition plate 205, the front seeds fall into the first seed filling area composed of the second seed row unit and the third seed row unit, the rear seeds fall into the second seed filling area composed of the first seed row unit and the second seed row unit, and the third seed filling area composed of the third seed row unit and the fourth seed row unit, respectively, the seeds above the seed partition plate 205 fall into the seed guide tube 12 and are arranged in sequence, waiting for replanting in the seed guide tube 12, and the two motors 16 are started. Under the action of the microcontroller and the motor drive board, the two motors are driven synchronously. The left motor 16 drives the sprockets 8 in the second and fourth seed row units to rotate synchronously clockwise through the connection of the coupling and the belt transmission mechanism 15, thereby driving the chains 10 in the second and fourth seed row units to rotate synchronously clockwise along the chain shaft groove 702, and the right motor 16 drives the sprockets 8 in the first and third seed row units to rotate synchronously counterclockwise, thereby driving the chains 10 in the first and third seed row units to rotate synchronously counterclockwise along the chain shaft groove 702. At this point, the four chains 10 all rotate synchronously; the first The seed filling area is filled with seeds under the action of gravity. The chain 10 of the second seed row unit rotates clockwise and part of the chain links are exposed in the first seed filling area. The chain 10 of the third seed row unit rotates counterclockwise and part of the chain links are exposed in the first seed filling area. The chain links 2 of the two chains are fixed with seed shifting plates. Under the action of the seed shifting plates, the seeds in the seed filling area move along the movement direction of the chain. With the synchronous rotation of the two chains, the corresponding chain links of the two chains form a corresponding seed cavity. The seeds are contained in the seed cavity formed by the two chains and move accordingly. When the seeds in the seed cavity move to the first rectangular hole 7041, the photoelectric sensor Whether there are seeds in the seed cavity is identified through the transparent baffle 9, and the collected information is transmitted to the microcontroller. If there are no seeds in the seed cavity, the microcontroller will open the electric control valve built into the first air blowing port 1101, and blow the seeds waiting in the seed guide tube 12 into the empty seed cavity to realize air blowing reseeding. After one reseeding is completed, the seeds in the seed guide tube 12 fall under the action of gravity and continue to wait for reseeding; the seeds in the seed cavity continue to move, and when they move to the third rectangular hole 7043, the microcontroller opens the electric control valve placed inside the second air blowing port 1102, and blows the seeds in the seed cavity into the seed discharge tube, thereby realizing air blowing reseeding.

[0021] The present invention controls the seeding amount of one seeding by designing the size of the chain link 1 (101) and the chain link 2 (102), and the seeding amount is accurate. The microcontroller controls the air blowing to supplement the seeding, reduces the missed seeding, and improves the continuity of seeding. The microcontroller controls the rotation speed of the motor to control the seeding speed. The air blowing is used during seeding, which accelerates the movement speed of the seeds, reduces the landing time of the seeds, and improves the seeding efficiency.

[0022] The beneficial effects of the invention are as follows: 1. The present invention improves the existing structure of the seeding device and completely changes the seeding method of the seeding device. 2. The present invention can control the motor speed to adjust the seeding speed. The seeding operation and the forward operation of the tractor do not affect each other, which can improve the operation speed of the tractor in the field and improve production efficiency. 3. The same drive motor can drive multiple seeding units to work synchronously, improve the utilization rate of power and reduce energy loss. 4. The motor, photoelectric sensor and electric control valve are all controlled by a microcontroller, which can not only improve the accuracy of the coordinated work of each working component, but also reduce the manufacturing cost of the device. 5. The device can be adapted to different sowing objects by changing the size of the chain and the chain link, and has strong versatility. In summary, the present invention has a compact structure and a reasonable design, which can effectively solve the problems of high work consumption and slow seeding speed of the existing seeding device, thereby realizing precision sowing and high-speed sowing operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is an overall schematic diagram of the assembly of a double-chain precision seed metering device based on a combination of photoelectric sensors and air blowing. The figure does not show the line connections between the microcontroller and the photoelectric sensors, motors and electronically controlled valves.

[0024] Figure 2 It is a schematic diagram of the frame of the double-chain precision seed metering device based on the combination of photoelectric sensors and air blowing.

[0025] Figure 3A This is a schematic diagram of the seed box of the double-chain precision seed metering device based on a combination of photoelectric sensors and air blowing.

[0026] Figure 3B This is a top view of the seed box of the double-chain precision seed metering device based on a combination of photoelectric sensors and air blowing.

[0027] Figure 4 It is a schematic diagram of a double-chain precision seeding device seeding assembly based on a combination of photoelectric sensors and air blowing.

[0028] Figure 5A Three views of the unit mounting plate.

[0029] Figure 5B Schematic diagram of the unit mounting plate.

[0030] Figure 6 This is a schematic diagram of the front transparent cover.

[0031] Figure 7 Schematic diagram of the rear transparent cover.

[0032] Figure 8 Schematic diagram of the seeding unit.

[0033] Fig. 9A Schematic diagram of the chain slot.

[0034] Fig. 9B This is the bottom view of the chain slot.

[0035] Fig.10 Schematic diagram of the sprocket.

[0036] Fig.11 Schematic diagram of a transparent baffle.

[0037] Fig.12 This is a schematic diagram of the assembly of link 1 and link 2.

[0038] Fig.13 This is a schematic diagram of the inspection and replenishment device.

[0039] Fig.14 A schematic diagram of the fixing bracket.

[0040] Fig.15 This is the three-view drawing of the seed guide tube.

[0041] Fig.16 Schematic diagram of the intake pipe.

[0042] Fig.17 Schematic diagram of belt drive mechanism.

[0043] Fig.18 Schematic diagram of the gas pipeline.

[0044] Fig.19 Schematic diagram of the seed tube.

[0045] In the figure, 1-frame, 101-frame front beam, 102-frame rear beam, 103-frame left beam, 104-frame right beam, 105-frame left front seed box support rod, 106-frame right front seed box support rod, 107-frame left rear seed box support rod, 108-frame right rear seed box support rod, 109-left motor fixing cylinder, 110-right motor fixing cylinder, 2-seed box, 201-seed box front baffle, 202-seed box rear baffle, 203-seed box left baffle, 204-seed box right baffle, 205-seed partition plate, 206-left baffle, 207-right baffle, 2081-first reseeding port, 2082-second reseeding port, 2083-third Reseeding port, 3-unit mounting plate, 301-lower bottom plate, 302-left baffle, 303-right baffle, 304-microcontroller fixing plate, 4-front transparent cover, 401-upper top plate, 402-front baffle, 5-rear transparent cover, 501-upper top plate, 502-rear baffle, 7-chain groove, 701-transmission chain groove, 702-axis chain groove, 703-sprocket groove, 7041-first rectangular hole, 7042-second rectangular hole, 7043-third rectangular hole, 705-reseeding circular hole, 706-rotating circular groove, 801-sprocket disc, 802-sprocket shaft, 9-transparent baffle, 101-chain link 1, 102-chain link 2, 11-fixed frame. 1101-first air blowing port, 1102-second air blowing port, 12-seed guide tube, 13-photoelectric sensor, 14-air inlet pipe, 1401-front port mounting bracket, 1402-rear port, 1403-lower port, 1501-V-belt, 1502-pulley, 16-motor, 17-air pipe, 18-seed discharge tube. DETAILED DESCRIPTION

[0046] The present invention is further described in detail below with reference to examples and drawings. Figure 1 The overall schematic diagram of the assembly of a double-chain precision seed metering device based on a combination of a photoelectric sensor and air blowing is shown in FIG. The double-chain precision seed metering device based on a combination of a photoelectric sensor and air blowing mainly consists of a frame 1, a seed box 2, Figure 4 Seed combination and Fig.13 Inspection and replenishment device composition.

[0047] like Figure 2Schematic diagram of the frame, the frame 1 is composed of a front frame beam 101, a rear frame beam 102, a left frame beam 103, a right frame beam 104, a left front seed box support rod 105, a right front seed box support rod 106, a left rear seed box support rod 107, a right rear seed box support rod 108, a left motor fixing cylinder 109 and a right motor fixing cylinder 110; the front frame beam 101, the rear frame beam 102, the left frame beam 103 and the right frame beam 104 are on the same horizontal plane and form a "mouth" frame structure; the left front seed box support rod 105 is vertically fixed to the front frame beam 101 and the left frame beam 103, and the right front seed box support rod 106 is vertically fixed to the front frame beam 101 and the right frame beam 104. On the frame, the seed box support rod 107 on the left rear side is vertically fixed to the frame rear beam 102 and the frame left beam 103, the seed box support rod 107 on the right rear side is vertically fixed to the frame rear beam 102 and the frame right beam 104, the seed box support rod 105 on the left front side and the seed box support rod 107 on the left rear side are symmetrical with the seed box support rod 106 on the right front side and the seed box support plate 108 on the right rear side, the seed box support rod 105 on the left front side and the seed box support rod 106 on the right front side are symmetrical with the seed box support rod 107 on the left rear side and the seed box support plate 108 on the right rear side; the left motor fixing tube 109 and the right motor fixing tube 110 are cylindrical tubes with an open upper end and a closed lower end, which are vertically fixed to the front beam of the frame and are symmetrical on the left and right sides.

[0048] like Figure 3A , Figure 3BThe seed box 2 is composed of a front baffle 201, a rear baffle 202, a left baffle 203, a right baffle 204, a seed partition 205, a left baffle 206, and a right baffle 207. The front baffle 201 and the rear baffle 202 are symmetrical front to back and perpendicular to the ground; the left baffle 203 and the right baffle 204 are symmetrical left to right and perpendicular to the ground; the left baffle 206 and the right baffle 207 are symmetrical left to right and inclined at a certain angle to the ground; the ... inclined at a certain angle to the ground; the front baffle 201 and the rear baffle 202 are symmetrical front to back and perpendicular to the ground; the left baffle 203 and the right baffle 204 are symmetrical left to right and perpendicular to the ground; the left baffle 206 and the right baffle 207 are symmetrical left to right and inclined at a certain angle to the ground; the left baffle 203 and the right baffle 204 are symmetrical left to right and inclined at a certain angle to the ground; the left baffle 203 and the right baffle 204 are symmetrical left to right and inclined at a certain angle to the ground; the left baffle 203 and the right baffle 204 are symmetrical left to right and inclined at a certain angle to the ground; the left baffle 2 The baffle 201, the rear baffle 202, the left baffle 203 and the right baffle 204 are fixed together to form a hollow box body; the front baffle 201, the rear baffle 202, the left baffle 206 and the right baffle 207 are fixed together to form a hollow boss; the seed partition plate 205 is a "convex" curved plate, which is low in the front and back and high in the middle, and is located at the center bottom of the box body. The edge of the seed partition plate 205 is connected to the inner surface of the left baffle 206 and the right baffle 207. The seed partition plate 205 intersects with the front baffle plate 201 of the seed box and the inner surface of the rear baffle plate 202 of the seed box, and a rectangular space is left. The seed partition plate 205 is also provided with a circular seed supplement opening 208, which are the first seed supplement opening 2081, the second seed supplement opening 2082, and the third seed supplement opening 2083 from left to right. The three seed supplement openings are perpendicular to the ground and penetrate the seed partition plate 205. The lower surface of the seed partition plate 205 coincides with the lower surface of the front baffle plate 201 of the seed box and the lower surface of the rear baffle plate 202 of the seed box. The height of the seed partition plate 205 is low. On the box body; the upper surface of the left middle baffle 206 coincides with the lower surface of the left baffle 203 of the seed box, and the upper surface of the right middle baffle 207 coincides with the lower surface of the right baffle 204 of the seed box; the front baffle 201 of the seed box, the rear baffle 202 of the seed box, the left baffle 203 of the seed box and the right baffle 204 of the seed box are fixed to the seed box support rod 105 on the left front side of the frame, the seed box support rod 106 on the right front side of the frame, the seed box support rod 107 on the left rear side of the frame, and the seed box support rod 108 on the right rear side of the frame by welding.

[0049] like Figure 4 It is a schematic diagram of the overall assembly of a seeding assembly, which consists of a unit mounting plate 3, a front transparent cover 4, a rear transparent cover 5, a microcontroller 6 and four seeding units.

[0050] like Figure 5A , Figure 5BThe unit mounting plate 3 is composed of a lower base plate 301, a left baffle plate 302, a right baffle plate 303 and a microcontroller fixing plate 304. The outer edge of the lower base plate 301 is rectangular and keeps level with the ground. Four straight slots with holes are evenly distributed horizontally. The left baffle plate 302 and the right baffle plate 303 are vertically fixed on the lower base plate 301. The lower bottom surfaces of the left baffle plate 302 and the right baffle plate 303 coincide with the upper surface of the lower base plate 301. The left baffle plate 302 and the right baffle plate 303 are symmetrical. The microcontroller fixing plate 3 04 is vertically fixed on the lower base plate 301, the upper surface of the microcontroller fixing plate 304 coincides with the lower surface of the lower base plate 301, the rear surface of the microcontroller fixing plate 304 coincides with the rear surface of the lower base plate 301 and is located at the center, the left baffle plate 302 and the right baffle plate 303 are respectively fixed to the seed box support rod 105 on the left front side of the frame, the seed box support rod 106 on the right front side of the frame, the seed box support rod 107 on the left rear side of the frame, and the seed box support rod 108 on the right rear side of the frame, so that the upper surface of the unit mounting plate 3 is parallel to the lower surface of the seed box 2.

[0051] like Figure 6 It is a schematic diagram of the front transparent cover shell, wherein the front transparent cover shell 4 is composed of an upper top plate 401 and a front baffle plate 402, the upper top plate 401 and the front baffle plate 402 are vertically fixed, the front transparent cover shell 4 is vertically fixed to the unit mounting plate 3, the lower surface of the front baffle plate 402 coincides with the upper surface of the unit mounting plate 3, the right surface of the front baffle plate 402 coincides with the right surface of the unit mounting plate 3, and the front surface of the front baffle plate 402 coincides with the front surface of the unit mounting plate 3.

[0052] like Figure 7 It is a schematic diagram of the rear transparent cover shell, which is composed of an upper top plate 501 and a rear baffle plate 502. The upper top plate 501 and the rear baffle plate 502 are vertically fixed, and the front transparent cover shell 5 is vertically fixed on the unit mounting plate 3. The lower surface of the front baffle plate 502 coincides with the upper surface of the unit mounting plate 3, the right surface of the front baffle plate 502 coincides with the right surface of the unit mounting plate 3, and the rear surface of the front baffle plate 502 coincides with the rear surface of the unit mounting plate 3.

[0053] like Figure 8 It is a schematic diagram of a seeding unit, which consists of a chain slot 7, a sprocket 8, a transparent baffle 9 and a chain 10. There are four of them from left to right, which are installed in four empty straight slots of the unit mounting plate 3 in sequence.

[0054] like Fig. 9A , Fig. 9BSchematic diagram of the chain groove and the bottom view of the chain groove. The chain groove 7 is in the shape of a straight groove cylinder with a closed upper surface and a hollow lower surface. A transmission chain groove 701, a chain shaft groove 702, a sprocket groove 703, a rectangular hole 704, a reseeding circular hole 705 and a rotating circular groove 706 are opened on the chain groove 7. The transmission chain groove 701 is horizontally distributed around the outer wall of the chain groove 7, the width does not penetrate the outer wall of the chain groove 7, and the height is lower than the outer wall of the chain groove 7. The chain shaft groove 702 is horizontally distributed around the outer wall of the chain groove 7, the height of the chain shaft groove 702 is higher than the transmission chain groove 701, and the width is narrower than the transmission chain groove 701. The sprocket groove 703 is opened in the front semicircular wall of the chain groove 7 and penetrates. The height is lower than that of the transmission chain groove 701. The rectangular holes 704 are opened on the vertical outer wall of the chain groove 7. There are three evenly distributed and penetrated, namely the first rectangular hole 7041, the second rectangular hole 7042, and the third rectangular hole 7043. The horizontal center planes of the transmission chain groove 701, the chain shaft groove 702, the sprocket groove 703 and the rectangular holes 704 coincide with each other. The vertical center lines of the cross-sections of the transmission chain groove 701 and the chain shaft groove 702 coincide with each other. The reseeding circular hole 705 is opened on the upper wall plate of the chain groove 7 and penetrates through it. The reseeding circular hole 705 is tangent to the inner surface of the left vertical wall of the chain groove 7. The rotating circular groove 706 is opened on the lower surface of the upper wall plate of the chain groove 7 and does not penetrate through it.

[0055] like Fig.10 It is a schematic diagram of a sprocket, wherein the sprocket 8 is composed of a sprocket plate 801 and a sprocket shaft 802, the upper surface and lower surface of the sprocket plate 801 coincide with the upper surface and lower surface of the sprocket groove 703 respectively, and the sprocket shaft 802 is coaxial with the rotating circular groove 706 and the upper surfaces coincide with each other.

[0056] like Fig.11 Schematic diagram of a transparent baffle, the transparent baffle 9 is rectangular and is installed on the rectangular hole 704 according to work requirements.

[0057] like Fig.12 Schematic diagram of the assembly of link 1 and link 2. The left and right chain shafts of link 1101 are longer than the upper and lower surfaces of link 1101 and are symmetrical. Link 2 (102) is fixedly connected to a seeding plate on one side of the left and right chain shafts. The seeding plate extends outward perpendicular to the horizontal plane to the outer surface of link 2 (102). The upper and lower surfaces of the chain shaft in the chain coincide with the upper and lower surfaces of the chain shaft groove 702 respectively, and the outer surface of the chain shaft is tangent to the left and right surfaces of the chain shaft groove 702 and slides along the chain shaft groove 702.

[0058] Fig.13 Schematic diagram of the inspection and supplementary drainage device, which consists of a fixing frame 11, a seed guide pipe 12, a photoelectric sensor 13, an air intake pipe 14 and an electric control valve.

[0059] Fig.14It is a schematic diagram of a fixing frame, wherein the fixing frame 11 is in a "T" shape, with its upper surface fixedly connected to the lower surface of the upper wall plate of the chain groove 7, a first air blowing port 1101 is opened at the center of the horizontal rod, a second air blowing port 1102 is opened on the right side of the first air blowing port 1101, and the second air blowing port 1102 extends a circular tube of a certain length to the left, and electric control valves are placed inside the two air blowing holes, and the electric control valves are respectively connected to the microcontroller 6 through wires.

[0060] Fig.15 The three-view drawing of the seed guide tube shows that the seed guide tube 12 is in a "T"-shaped tube as a whole. The upper port is a circular tube which coincides with the seed supplement port of the seed partition plate 205. The left port is a rectangular tube which coincides with the second rectangular hole 7042 when installed. The right port is a circular tube which coincides with the first air blowing port 1101.

[0061] Fig.16 Schematic diagram of the air intake pipe, the air intake pipe 14 has three ports: a front port 1401, a rear port 1402, and a lower port 1403. The front port 1401 coincides with the right side of the first air blowing port 1101, and the rear port 1402 coincides with the right side of the second air blowing port 1102.

[0062] Fig.17 Schematic diagram of belt transmission mechanism, the belt transmission mechanism 15 consists of a V-belt 1501 and two pulleys 1502, the V-belt 1501 and the pulleys 1502 are used together, the two pulleys 1502 are respectively fixed on two sprocket shafts 802 separated, and the pulleys 1502 are coaxial with the sprocket shafts 802.

[0063] Fig.18 It is a schematic diagram of an air delivery pipe, wherein the air delivery pipe 17 is tubular as a whole and is provided with an air inlet and three air outlets. The air inlet is connected to an external air blowing device, and the three air outlets are respectively overlapped and fixedly connected with the lower ports 1403 of the three air inlet pipes 14 of the seeding assembly.

[0064] Fig.19 Schematic diagram of a seed discharging tube, the seed discharging tube 18 is in the shape of a right-angle cylinder and is vertically fixed on the chain slot 7 , and the right end of the seed discharging tube 18 is externally connected to the third rectangular hole 7043 .

[0065] The present invention is applied to a combined operation machine. Before the operation, seeds are first poured into the seed box 2. The seeds at the bottom of the seed box are divided into the front and rear sides by the seed partition plate 205. The front seeds fall into the first seed filling area composed of the second seed row unit and the third seed row unit, and the rear seeds fall into the second seed filling area composed of the first seed row unit and the second seed row unit, and the third seed filling area composed of the third seed row unit and the fourth seed row unit. The seeds above the seed partition plate 205 fall into the seed guide tube 12 and are arranged in sequence, waiting for replanting in the seed guide tube 12. The two motors 16 are started, and under the action of the microcontroller and the motor drive board, the seeds are placed in the seed guide tube 12 and the seed guide tube 12 is used for seed filling. , the two motors rotate synchronously, through the connection of the coupling and the belt transmission mechanism 15, the left motor 16 drives the sprocket 8 in the second and fourth seed row units to rotate synchronously clockwise, and then drives the chain 10 in the second and fourth seed row units to rotate synchronously clockwise along the chain shaft groove 702, and the right motor 16 drives the sprocket 8 in the first and third seed row units to rotate synchronously counterclockwise, and then drives the chain 10 in the first and third seed row units to rotate synchronously counterclockwise along the chain shaft groove 702. At this point, the four chains 10 are all synchronously rotated. The first seed filling area is filled with seeds under the action of gravity, the chain 10 of the second seed row unit rotates clockwise and part of the chain links are exposed in the first seed filling area, the chain 10 of the third seed row unit rotates counterclockwise and part of the chain links are exposed in the first seed filling area, the chain links 2 of the two chains are fixedly connected with seed shifting plates, under the action of the seed shifting plates, the seeds in the seed filling area move along the movement direction of the chain, with the synchronous rotation of the two chains, the corresponding chain links of the two chains form a corresponding seed cavity, the seeds are contained in the seed cavity formed by the two chains and move accordingly, when the seeds in the seed cavity move to the first rectangular hole 7041, the photoelectric sensor The sensor identifies whether there are seeds in the seed cavity through the transparent baffle 9, and transmits the collected information to the microcontroller. If there are no seeds in the seed cavity, the microcontroller will open the electric control valve built into the first air blowing port 1101, and blow the seeds waiting in the seed guide tube 12 into the empty seed cavity to achieve air blowing reseeding. After one reseeding is completed, the seeds in the seed guide tube 12 fall under the action of gravity and continue to wait for reseeding; the seeds in the seed cavity continue to move, and when they move to the third rectangular hole 7043, the microcontroller opens the electric control valve placed inside the second air blowing port 1102, and blows the seeds in the seed cavity into the seed discharge tube, thereby achieving air blowing reseeding.

[0066] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A double-chain precision seed metering device based on a combination of photoelectric sensors and air blowing, characterized in that: The precision seeding device is composed of a frame (1), a seed box (2), a seeding assembly, a seeding inspection and replenishment device, a belt transmission mechanism (15), a motor (16), an air pipe (17) and a seeding pipe (18); the frame (1) is composed of a frame front beam (101), a frame rear beam (102), a frame left beam (103), a frame right beam (104), a frame left front side seed box support rod (105), a frame right front side seed box support rod (106), a frame left rear side seed box support rod (107), a frame right rear side seed box support rod (108), a left motor fixing cylinder (109) and a right motor fixing cylinder (110); the frame front beam (101), the frame rear beam (102), the frame The left beam (103) and the right beam (104) of the frame are on the same horizontal plane and form a "mouth" frame structure; the seed box support rod (105) on the left front side of the frame is vertically fixed to the front beam (101) of the frame and the left beam (103) of the frame, the seed box support rod (106) on the right front side of the frame is vertically fixed to the front beam (101) of the frame and the right beam (104) of the frame, the seed box support rod (107) on the left rear side of the frame is vertically fixed to the rear beam (102) of the frame and the left beam (103) of the frame, the seed box support rod (107) on the right rear side of the frame is vertically fixed to the rear beam (102) of the frame and the right beam (104) of the frame, the seed box support rod (105) on the left front side of the frame and the seed box support rod (106) on the left rear side of the frame are vertically fixed to the front beam (101) of the frame and the left beam (104) of the frame. 107) is symmetrical with the seed box support rod (106) on the right front side of the frame and the seed box support plate (108) on the right rear side of the frame, and the seed box support rod (105) on the left front side of the frame and the seed box support rod (106) on the right front side of the frame are symmetrical with the seed box support rod (107) on the left rear side of the frame and the seed box support plate (108) on the right rear side of the frame; the left motor fixing cylinder (109) and the right motor fixing cylinder (110) are cylindrical cylinders with an open upper end and a closed lower end, which are vertically fixed to the front beam of the frame and are symmetrical on the left and right; the seed box (2) is composed of a seed box front baffle (201), a seed box rear baffle (202), a seed box left baffle (203), a seed box right baffle (204), a seed partition plate (205), a left baffle The seed box is composed of a front baffle (201) and a rear baffle (202) of the seed box, which are symmetrical in front and back and perpendicular to the ground; the left baffle (203) and the right baffle (204) of the seed box are symmetrical in left and right and perpendicular to the ground; the left baffle (206) and the right baffle (207) of the seed box are symmetrical in left and right and inclined at a certain angle to the ground; the front baffle (201) of the seed box, the rear baffle (202) of the seed box, the left baffle (203) of the seed box and the right baffle (204) of the seed box are fixed together to form a hollow box body; the front baffle (201) of the seed box, the rear baffle (202) of the seed box, the left baffle (206) and the right baffle (207) of the seed box are fixed together to form a hollow boss in the upper and lower parts;The seed partition plate (205) is a "convex" curved plate, which is lower in the front and back and higher in the middle. It is located at the center bottom of the box body. The edge of the seed partition plate (205) intersects with the inner surfaces of the left baffle plate (206) and the right baffle plate (207), and a rectangular space is left with the inner surfaces of the front baffle plate (201) and the rear baffle plate (202) of the seed box. The seed partition plate (205) is also provided with a circular seed supplement opening (208), which are, from left to right, the first seed supplement opening (2081), the second seed supplement opening (2082), and the third seed supplement opening (2083). The three seed supplement openings are perpendicular to the ground and penetrate the seed partition plate (205). The lower surface of the seed partition plate (205) intersects with the front baffle plate (201) of the seed box. 01) overlaps with the lower surface of the rear baffle plate (202) of the seed box, and the height of the seed partition plate (205) is lower than the box body; the upper surface of the left middle baffle plate (206) overlaps with the lower surface of the left baffle plate (203) of the seed box, and the upper surface of the right middle baffle plate (207) overlaps with the lower surface of the right baffle plate (204) of the seed box; the front baffle plate (201) of the seed box, the rear baffle plate (202) of the seed box, the left baffle plate (203) of the seed box, and the right baffle plate (204) of the seed box are fixed to the seed box support rod (105) on the left front side of the frame, the seed box support rod (106) on the right front side of the frame, the seed box support rod (107) on the left rear side of the frame, and the seed box support rod (108) on the right rear side of the frame by welding; The seeding assembly is composed of a unit mounting plate (3), a front transparent cover (4), a rear transparent cover (5), a microcontroller (6) and four seeding units; the unit mounting plate (3) is composed of a lower base plate (301), a left baffle plate (302), a right baffle plate (303) and a microcontroller fixing plate (304); the outer edge of the lower base plate (301) is rectangular and kept horizontal with the ground, and has four straight slots evenly distributed in the horizontal direction; the left baffle plate (302) and the right baffle plate (303) are vertically fixed to the lower base plate (301); the lower bottom surfaces of the left baffle plate (302) and the right baffle plate (303) are aligned with the upper surface of the lower base plate (301); The left baffle plate (302) and the right baffle plate (303) are symmetrical, the microcontroller fixing plate (304) is vertically fixed to the lower base plate (301), the upper surface of the microcontroller fixing plate (304) is overlapped with the lower surface of the lower base plate (301), the rear surface of the microcontroller fixing plate (304) is overlapped with the rear surface of the lower base plate (301) and is located at the center, the left baffle plate (302) and the right baffle plate (303) are respectively fixed to the seed box support rod (105) on the left front side of the frame, the seed box support rod (106) on the right front side of the frame, the seed box support rod (107) on the left rear side of the frame, and the seed box support rod (108) on the right rear side of the frame, so that the unit The upper surface of the mounting plate (3) is parallel to the lower surface of the seed box (2); the front transparent cover shell (4) is composed of an upper top plate (401) and a front baffle plate (402); the upper top plate (401) and the front baffle plate (402) are vertically fixed; the front transparent cover shell (4) is vertically fixed to the unit mounting plate (3); the lower surface of the front baffle plate (402) coincides with the upper surface of the unit mounting plate (3); the right surface of the front baffle plate (402) coincides with the right surface of the unit mounting plate (3); and the front surface of the front baffle plate (402) coincides with the front surface of the unit mounting plate (3); the rear transparent cover shell (5) is composed of an upper top plate (501) and a rear baffle plate (502); the upper top plate (401) and the front baffle plate (402) are vertically fixed to the unit mounting plate (3); the lower surface of the front baffle plate (402) coincides with the upper surface of the unit mounting plate (3); the right surface of the front baffle plate (402) coincides with the right surface of the unit mounting plate (3); and the front surface of the front baffle plate (402) coincides with the front surface of the unit mounting plate (3); The plate (501) and the rear baffle plate (502) are vertically fixed, the front transparent cover shell (5) is vertically fixed on the unit mounting plate (3), the lower surface of the front baffle plate (502) coincides with the upper surface of the unit mounting plate (3), the right surface of the front baffle plate (502) coincides with the right surface of the unit mounting plate (3), and the rear surface of the front baffle plate (502) coincides with the rear surface of the unit mounting plate (3); the microcontroller (6) is parallelly fixed on the microcontroller fixing plate (304), the lower surface of the microcontroller (6) coincides with the front surface of the microcontroller fixing plate (304), and the microcontroller (6) is installed at the center of the microcontroller fixing plate (304); The seeding unit is composed of a chain groove (7), a sprocket (8), a transparent baffle (9) and a chain (10). There are four of them from left to right, which are installed in four hollow straight grooves of the unit mounting plate (3) in sequence. The chain groove (7) is in the shape of a straight groove cylinder with a closed upper surface and a hollow lower surface. A transmission chain groove (701), a chain shaft groove (702), a sprocket groove (703), a rectangular hole (704), a reseeding circular hole (705) and a rotating circular groove (706) are opened on the chain groove (7). The transmission chain groove (701) is horizontally distributed around the outer wall of the chain groove (7), has a width that does not penetrate the outer wall of the chain groove (7), and has a height lower than the chain groove (7). The outer wall of the chain groove (7) is horizontally distributed around the outer wall of the chain groove (7), the chain groove (702) is higher than the transmission chain groove (701) and narrower than the transmission chain groove (701), the sprocket groove (703) is opened on the front semicircular wall of the chain groove (7) and penetrates, and the height is lower than the height of the transmission chain groove (701), and the rectangular hole (704) is opened on the vertical outer wall of the chain groove (7), and three are evenly distributed and penetrate, namely the first rectangular hole (7041), the second rectangular hole (7042), and the third rectangular hole (7043). The water of the transmission chain groove (701), the chain groove (702), the sprocket groove (703) and the rectangular hole (704) The flat center planes coincide with each other, the vertical center lines of the cross sections of the transmission chain groove (701) and the chain shaft groove (702) coincide with each other, the reseeding circular hole (705) is opened on the upper wall plate of the chain groove (7) and penetrates through it, the reseeding circular hole (705) is tangent to the inner surface of the left vertical wall of the chain groove (7), and the rotating circular groove (706) is opened on the lower surface of the upper wall plate of the chain groove (7) and does not penetrate through it; the sprocket (8) is composed of a sprocket wheel plate (801) and a sprocket shaft (802), the upper surface and the lower surface of the sprocket wheel plate (801) coincide with the upper surface and the lower surface of the sprocket groove (703) respectively, the sprocket shaft (802) and the rotating circular groove (706) are coaxial and the upper surfaces coincide with each other; the transparent The baffle (9) is rectangular and is installed on the rectangular hole (704) according to working requirements; the chain is composed of a chain link (10) connected by a chain link 1 (101) and a chain link 2 (102) to form a straight groove, the left and right chain axes of the chain link 1 (101) are longer than the upper and lower surfaces of the chain link 1 (101) and are symmetrical up and down, the chain link 2 (102) is fixedly connected to a sowing plate on one side of the left and right chain axes, and the sowing plate extends outward perpendicular to the horizontal plane to the outer surface of the chain link 2 (102), the upper and lower surfaces of the chain axis in the chain coincide with the upper and lower surfaces of the chain axis groove (702), and the outer surface of the chain axis is tangent to the left and right surfaces of the chain axis groove (702) and slides along the chain axis groove (702); The inspection and supplementary rowing device comprises a fixed frame (11), a seed guide tube (12), a photoelectric sensor (13), an air inlet pipe (14) and an electric control valve. The fixed frame (11) is in a "T" shape, and its upper surface is fixedly connected to the lower surface of the upper wall plate of the chain groove (7). A first air blowing port (1101) is opened at the center of the horizontal rod, and a second air blowing port (1102) is opened on the right side of the first air blowing port (1101). The second air blowing port (1102) extends a circular tube of a certain length to the left. Electric control valves are arranged inside the two air blowing holes, and the electric control valves are respectively connected to the microcontroller (6) through electric wires. The seed guide tube (12) is in a "T"-shaped tube as a whole, and the upper port is a circular tube that coincides with the supplementary seeding port of the seed partition plate (205). The left port is a rectangular tube. When installed, The photoelectric sensor (13) is mounted on the fixing frame (11) and is located on the same horizontal plane as the first air blowing port (1101) and the second air blowing port (1102). The photoelectric sensor (13) is located on the left side of the first air blowing port (1101). The sensing port of the photoelectric sensor (13) is aligned with the first rectangular hole (7041). The air inlet pipe (14) has three ports, namely a front port (1401), a rear port (1402) and a lower port (1403). The front port (1401) coincides with the right side of the first air blowing port (1101), and the rear port (1402) coincides with the right side of the second air blowing port (1102). The belt transmission mechanism (15) is composed of a V-belt (1501) and two pulleys (1502). The V-belt (1501) and the pulleys (1502) are used in conjunction with each other. The pulleys (1502) are respectively fixed to two sprocket shafts (802) spaced apart from each other. The pulleys (1502) are coaxial with the sprocket shafts (802). There are two motors (16) connected to the two middle sprocket shafts (802) through couplings, and the two motors are fixed in the left motor fixing cylinder (109) and the right motor fixing cylinder (110). The motors are connected to the microcontroller (6) through wires and a motor controller. The air delivery pipe (17) is tubular in shape as a whole and is provided with an air inlet and three air outlets. The air inlet is connected to an external air blowing device, and the three air outlets are respectively overlapped and fixedly connected to the lower ports (1403) of the three air inlet pipes (14) of the seeding assembly. The seeding pipe (18) is in the shape of a right-angle cylinder and is vertically fixedly connected to the chain groove (7). The right port of the seeding pipe (18) is externally connected to the third rectangular hole (7043).

Images