Seed meter with pneumatic assistance

Abstract

The application is a seed-metering device with pneumatic assistance, comprising: a seed-metering shell, the top of which is a seed inlet, and the first sidewall of the bottom of which is provided with a seed-metering channel extending downwardly and obliquely; a seeding wheel, which is rotatably arranged in the seed-metering shell; a gas delivery channel, the air inlet of one end of which is arranged at the second sidewall of the bottom of the seed-metering shell, and the air outlet of the other end of which extends downwardly and obliquely and communicates with the seed-metering channel; the seed-metering channel is provided with the gas delivery channel extending upwardly and obliquely, one end of the gas delivery channel communicates with the second sidewall to form the air inlet, and the seed-metering channel is connected with the air outlet of the gas delivery channel; a fan is arranged at the air inlet, and the wind power generated by the fan is blown into the seed-metering channel through the gas delivery channel, so as to accelerate the discharge of the seed particles in the seed-metering channel and reduce the probability of collision or blockage of the seed particles in the seed-metering channel.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of agricultural machinery, in particular to a seed metering device with pneumatic auxiliary seed feeding. BACKGROUND

[0002] The seed metering device is a device for feeding seeds from a seed shell into a seed channel and then discharging the seeds from the seed channel by rotating a seed wheel, and the seed discharge rate is affected by the size and curvature of the seed channel. For rapeseed seeds with small particle size and easy breakage, the seeds will collide with the inner wall of the seed channel multiple times during the seed discharge process, which can easily cause the rapeseed seeds to break. For poor flow type wheat seeds, the seeds are prone to blockage when passing through the seed channel.

[0003] Therefore, how to achieve high-speed seed discharge and reduce the probability of collision and blockage has become a problem that researchers in the field need to solve. SUMMARY

[0004] The technical problem to be solved by the present application is how to achieve high-speed seed discharge and reduce the probability of collision and blockage.

[0005] To solve the above technical problems, the technical scheme adopted by the present application is as follows:

[0006] The seed metering device with pneumatic auxiliary seed feeding comprises a seed shell, a seed wheel, and a gas feeding channel. The top of the seed shell is a seed inlet, and the first side wall at the bottom of the seed shell is inclined downward and provided with a seed channel. The seed wheel is rotatably arranged in the seed shell. The gas inlet of one end of the gas feeding channel is arranged at the second side wall at the bottom of the seed shell, and the gas outlet of the other end of the gas feeding channel is inclined downward and communicates with the seed channel.

[0007] Further, a first inclined guide plate is arranged in the seed shell, and a gas feeding channel is formed between the first inclined guide plate and the inclined bottom wall of the seed shell.

[0008] Further, a baffle plate is arranged in the seed shell, and the lower part of the baffle plate is located in the gas feeding channel, and the bottom end of the first guide plate is connected with the baffle plate.

[0009] Further, two parallel second guide plates are arranged at the seed inlet at the top of the seed shell, and a row of movable insertion plates are movably arranged between the two second guide plates. The row of movable insertion plates can be moved to close or open the seed inlet of the seed shell.

[0010] Further, a seed cleaning brush is arranged at one side of the seed wheel and close to the second side wall, and one side surface of the seed cleaning brush is in contact with the outer periphery of the seed wheel.

[0011] Furthermore, a fixed shaft is provided in the seed shell near the first side wall, and a connecting ear is fixedly provided on the fixed shaft and a sowing tongue is rotatably provided; the connecting ear includes a first sleeve which is fixedly connected to the fixed shaft, and a first support portion is extended from the outer wall of the first sleeve toward the first side wall; the sowing tongue includes a second sleeve which is rotatably connected to the fixed shaft, and a second support portion is extended from the second sleeve toward the first side wall, and the second support portion and the first support portion are connected by an elastic member, and a sowing portion is extended from the second sleeve into the seed shell, and a sowing gap is formed between the end of the sowing portion and the sowing wheel.

[0012] Furthermore, a limiting rod is fixedly provided on the first supporting portion, and an end portion of the limiting rod is suitable for abutting against the second supporting portion to prevent the sowing portion from colliding with the sowing wheel.

[0013] The beneficial effects of the present invention are as follows: the present invention is a seed metering device with pneumatically assisted seed delivery, and an air supply channel is provided in the seeding channel which extends obliquely upward, one end of the air supply channel is connected with the second side wall to form an air inlet, and the seeding channel is connected with the air outlet of the air supply channel; a fan is provided at the air inlet, and the wind generated by the fan is blown into the seeding channel through the air supply channel, thereby accelerating the discharge of seed particles from the seeding channel and reducing the probability of collision or blockage between the seed particles and the seeding channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention will be further described below with reference to the accompanying drawings and examples.

[0015] Figure 1 It is a structural schematic diagram of the present invention;

[0016] Figure 2 It is a schematic diagram of the structure of the connecting ear;

[0017] Figure 3 It is a schematic diagram of the structure of the sowing tongue;

[0018] Figure 4 This is a diagram of the connection ears, sowing tongue, and fixed shaft. DETAILED DESCRIPTION

[0019] The present invention will now be described in further detail with reference to the accompanying drawings, which are simplified schematic diagrams that illustrate the basic structure of the present invention in a schematic manner.

[0020] In order to achieve high-speed seeding and reduce the probability of collision and blockage, the present invention adopts the following embodiments:

[0021] like Figure 1As shown in the figure, the seed metering device is a cross-sectional view, the rotating seed wheel 2 is arranged in the seed metering shell 1, the top of the seed metering shell 1 is provided with the seed inlet 13, the right side of the seed metering shell 1 is the inclined first side wall 11, the left side is the vertical second side wall 12, the right part of the seed wheel 2 is the filling port 14, the lower part of the seed wheel 2 is the seed drop port 15, the seed drop port 15 is communicated with the seed metering channel 3 arranged obliquely downward, the seed particles can enter the filling port 14 of the seed metering shell 1 from the seed inlet 13, and the seed particles enter the seed metering channel 3 from the filling port 14 through the seed drop port 15 for seed metering through the rotation of the seed wheel 2; the seed metering channel 3 is provided with the air supply channel 4 arranged obliquely upward, one end of the air supply channel 4 is communicated with the second side wall 12 to form the air inlet 41, and the seed metering channel 3 is connected with the air outlet 42 of the air supply channel 4; the air inlet 41 is provided with a fan, and the air generated by the fan is blown into the seed metering channel 3 through the air supply channel 4, so that the seed particles in the seed metering channel 3 are accelerated to be discharged, and the probability of collision or blockage of the seed particles with the seed metering channel 3 is reduced.

[0022] As Figure 1 shown, in some possible embodiments, in order to illustrate the specific arrangement mode of the air supply channel, the embodiment adopts the first guide plate 16 arranged in the seed metering shell 1 obliquely downward, the first guide plate 16 is a structure with the left high and the right bottom, the first guide plate 16 is parallel to the bottom wall 17 of the seed metering shell 1, therefore the inner contour of the air supply channel 4 formed between the first guide plate 16 and the bottom wall 17 does not change along the direction of gas movement, therefore the flow rate of the gas in the air supply channel 4 is stable, and the high-speed stable seed metering of the seed particles is realized.

[0023] As Figure 1 shown, in some possible embodiments, in order to avoid that the air of the air supply channel is blown into the seed drop port, and the seed particles are not convenient to be discharged, the embodiment adopts the air baffle 18 arranged in the seed metering shell 1, the lower part of the air baffle 18 is located in the air supply channel 4, and one end of the bottom of the first guide plate 16 is connected with the air baffle 18;

[0024] In the embodiment, the air baffle 18 is approximately an arc structure, one end of the bottom of the air baffle 18 is located in the air supply channel 4, and the left side wall of the air baffle 18 is connected with the end of the first guide plate 16, so that the air is blown from the air supply channel 4, and due to the guidance of the air baffle 18, the air cannot be blown into the seed drop port 15, that is, in the seed metering channel 4, only the part close to the bottom wall 17 has the air force.

[0025] As Figure 1 shown, in some possible embodiments, in order to adjust the amount of seeds entering the seed metering shell, the embodiment adopts the two parallel second guide plates 19 arranged at the seed inlet of the top of the seed metering shell 1, and the movable closing insertion plate 5 is arranged between the two second guide plates 19; the closing insertion plate 5 is moved to close or open the seed inlet 13 of the seed metering shell 1.

[0026] In the embodiment, two parallel second guide plates 19 are arranged on the top of the seed sowing shell 1, the second guide plates 19 are arranged in a structure of left high and right low, and a movable row closing plug 5 is arranged between the two second guide plates 19, the opening and closing of the seed inlet 13 is realized by moving the row closing plug 5, and then whether the seed particles enter the seed sowing shell 1 is controlled.

[0027] As shown in Figure 1 In some possible embodiments, during the rotation of the seeding wheel, in order to avoid that the seed particles attached to the seeding wheel are attached to the seeding wheel and rotate with the seeding wheel, which affects the seed sowing of other seed particles, the seed cleaning brush 6 is arranged on one side of the seeding wheel 2 and close to the second side wall 12, and one side of the seed cleaning brush 6 is in contact with the left outer circumferential surface of the seeding wheel 2.

[0028] In the embodiment, by arranging the brush in contact with the left side of the seeding wheel 2, if there are seed particles attached to the seeding wheel 2 after the clockwise rotation of the seeding wheel 2, the brush can clean the seed particles on the seeding wheel 2.

[0029] As shown in Figures 2-4 In some possible embodiments, a fixed shaft 7 is arranged in the seed sowing shell 1 close to the first side wall, a connecting lug 8 and a seeding tongue 9 are fixedly arranged on the fixed shaft 7; the connecting lug 8 comprises a first sleeve 81 fixedly connected with the fixed shaft 7, and a first supporting portion 82 is arranged on the outer wall of the first sleeve 81 and extends to the first side wall 11; the seeding tongue 9 comprises a second sleeve 91 rotatably connected with the fixed shaft 7, a second supporting portion 92 is arranged on the second sleeve 91 and extends to the first side wall 11, the second supporting portion 92 and the first supporting portion 82 are connected through the elastic member 10, the second sleeve 91 extends into the seed sowing shell 1 and is provided with a seeding portion 93, and the end of the seeding portion 93 and the seeding wheel 2 form a seed sowing gap 111.

[0030] In the embodiment, when the foreign matter with large diameter is put into the seed discharge shell 1, the foreign matter will be stuck in the gap between the seeding tongue 9 and the seeding wheel 2, causing the seeding wheel 2 to stop rotating, and in serious cases, causing damage to the driving mechanism of the seeding wheel 2. Therefore, the seeding tongue 9 in the application is of a resilient structure, which can adjust the seed discharge gap 111 according to the size of the diameter of the foreign matter. Specifically, the first sleeve 81 of the connecting lug 8 is sleeved on the fixed shaft 7, the right side of the first sleeve 81 is the first support part 82, the first support part 82 is located outside the seed discharge shell 1, the second sleeve 91 of the seeding tongue 9 is freely rotatable on the fixed shaft 7, the right end of the seeding tongue 9 is the second support part 92, the second support part 92 is located outside the seed discharge shell 1 and is arranged above the first support part 82; the seeding part 93 on the left side of the second sleeve 91, the seeding part 93 is located inside the seed discharge shell 1, and the end of the seeding part 93 is located below the seeding wheel 2 and forms a seed discharge gap 111 with the seeding wheel 2, and the elastic member 10 is arranged between the first support part 82 and the second support part 92; when encountering a foreign matter with a large diameter, the elastic member 10 is elongated, the seed discharge gap 111 formed by the seeding part 93 and the seeding wheel 2 is increased in distance, and the foreign matter can enter the seed discharge channel 3 from the gap, avoiding the stop of the seeding wheel 2; after the foreign matter passes through the seed discharge gap 111, the elastic member 10 resets to move the end of the seeding part 93 close to the seeding wheel 2.

[0031] As shown in Figures 2-4 some possible embodiments, in order to avoid collision between the seeding part and the seeding wheel after the seeding part rotates, the embodiment adopts a limiting rod 110 arranged above the first support part 82, the end of the limiting rod 110 is adapted to abut against the second support part 92, avoiding the seeding part 93 from colliding with the seeding wheel 2;

[0032] The first support part 82 and the second support part 92 are arranged in an up-down position, when the end of the seeding part 93 is close to the seeding wheel 2, at this time, the bottom of the limiting rod 110 on the first support part 82 is in contact with the second support part 92, avoiding the seeding part 93 from continuing to move close to the seeding wheel 2, causing interference between the seeding wheel 2 and the seeding part 93.

[0033] Based on the above ideal embodiments according to the application, through the above description, relevant staff can make various changes and modifications without deviating from the technical idea of the application. The technical scope of the application is not limited to the contents in the specification, and must be determined according to the scope of claims.

Claims

1. A pneumatically assisted seed-feeding device, characterized in that: include: The seeding shell has a seed inlet at the top and a seeding channel extending obliquely downward on the first side wall at the bottom; A seeding wheel rotatably disposed within the seeding shell; An air supply channel, the air inlet at one end of which is opened at the second side wall of the bottom of the seed discharging shell, and the air outlet at the other end of which extends obliquely downward and is connected to the seed discharging channel; A fixed shaft is provided in the seeding shell near the first side wall, and a connecting ear is fixedly provided on the fixed shaft and a sowing tongue is rotatably provided; The connecting ear comprises a first sleeve fixedly connected to the fixed shaft, and a first supporting portion is provided on the outer wall of the first sleeve extending toward the first side wall; The sowing tongue includes a second sleeve rotatably connected to the fixed shaft, the second sleeve is provided with a second support portion extending toward the first side wall, the second support portion and the first support portion are connected by an elastic member, the second sleeve is provided with a sowing portion extending into the seed shell, and a sowing gap is formed between the end of the sowing portion and the sowing wheel.

2. The pneumatically assisted seed-feeding device according to claim 1, characterized in that: A first guide plate facing downward is provided in the seeding shell, and an air supply channel is formed between the first guide plate and the bottom wall facing downward of the seeding shell.

3. The pneumatically assisted seed-feeding device according to claim 2, characterized in that: An air blocking plate is provided in the seeding shell, the lower portion of the air blocking plate is located in the air supply channel, and one end of the bottom of the first guide plate is connected to the air blocking plate.

4. The pneumatically assisted seed-feeding device according to claim 1, characterized in that: Two parallel second guide plates are provided at the seed inlet on the top of the seed shell, and a row-closing plate is movably provided between the two second guide plates; the row-closing plate is moved to close or open the seed inlet of the seed shell.

5. The pneumatically assisted seed-feeding device according to claim 1, characterized in that: A seed cleaning brush is provided on one side of the seeding wheel and close to the second side wall, and one side surface of the seed cleaning brush contacts the outer peripheral surface of the seeding wheel.

6. The pneumatically assisted seed-feeding device according to claim 1, characterized in that: A limiting rod is fixedly provided on the first supporting portion, and an end portion of the limiting rod is suitable for abutting against the second supporting portion to prevent the sowing portion from colliding with the sowing wheel.

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