Seeding device capable of being used for seeding corn and peas

Abstract

The invention discloses a sowing device capable of being used for sowing corn and peas, the sowing device comprises a mobile carrier, a seed storage box, a seed distribution unit and a plurality of seed sowing units, the seed distribution unit can distribute seeds in the seed storage box to each seed sowing unit; the seed sowing unit comprises a ditching unit, a seed metering unit and a soil covering unit. According to the seeding device disclosed by the invention, seeds can be effectively distributed to each seed seeding unit, and the negative pressure fan is matched with the first turntable, so that the seeds can accurately fall into the discharging pipe, and the seeding accuracy is improved. By means of the positioning mechanism and the driving mechanism, automatic switching of sowing of different kinds of seeds of corn and peas is achieved, manual switching is not needed, and the sowing efficiency and flexibility are improved. And a sawtooth part and a detection groove are matched with a pressure sensor, so that manual maintenance can be prompted when the state cannot be switched.

Description

Technical Field

[0001] The present invention relates to the technical field of sowing devices, and more particularly to a sowing device capable of being used for sowing corn and peas. Background Art

[0002] A sowing device is an agricultural machine used to spread or implant seeds into the soil for the purpose of planting crops. It is usually connected to a tractor or other powered machinery to improve sowing efficiency through mechanized operation.

[0003] Different crops can be intercropped and relay-cropped. For example, corn and peas are often planted together in the same field. Many existing seed drills use negative pressure suction to suck up and deposit seeds. However, corn and pea seeds differ in shape and size. Corn seeds are typically flat, slightly oval, or kidney-shaped. They are relatively large, approximately 1-1.5 cm long and 0.5-1 cm wide. Their surface is smooth and comes in a variety of colors, including yellow, white, and red. Pea seeds are typically spherical or slightly oblate. They are relatively small, approximately 0.5-1 cm in diameter. Their surface is smooth and comes in a variety of colors, including green, yellow, and brown. When using negative pressure suction to draw in seeds, the suction hole should ideally be slightly smaller than the seed (to prevent the seed from passing through it), but not too small (too small would result in insufficient suction force and unstable suction). Existing seed drills have fixed suction hole sizes that cannot be adjusted to suit seed size. Therefore, if corn and peas need to be sown on the same piece of land, if the same planter is used, the sowing effect will not be good. If different planters are used to sow them separately, the cost of the planter will be too expensive. Summary of the Invention

[0004] The present invention aims to overcome the defects of the prior art and provide a sowing device that can be used for sowing corn and peas.

[0005] In order to achieve the above-mentioned objectives, the present invention provides the following technical solutions: a sowing device, comprising a mobile carrier, a seed storage box, a seed distribution unit and multiple seed sowing units, the seed distribution unit can distribute the seeds in the seed storage box to each seed sowing unit, the seed sowing unit comprises a furrowing unit, a seeding unit and a soil covering unit, the seeding unit comprises a first shell, a second shell, a first turntable, a second turntable installed at the first turntable, a rotating shaft connected to the first turntable, a first motor that drives the rotating shaft to rotate, a negative pressure fan connected to the second shell through a suction pipe, a discharge pipe and a feed pipe connected to the first shell, the first turntable has a groove portion, the second turntable is installed at the groove portion through a turntable fixing unit, the first turntable has multiple suction holes, the second turntable has multiple first notch portions and multiple second notch portions, part of the suction holes is located inside the groove portion, and the other part is located outside the groove portion.

[0006] Furthermore, the trenching unit is used for trenching.

[0007] Furthermore, the soil covering unit is used to push the soil into the trench opened by the trench opening unit.

[0008] Furthermore, the mobile vehicle is a tractor.

[0009] Furthermore, the seed distribution unit includes a suction fan and a distribution pipe portion, the distribution pipe portion has a plurality of branch pipes, and each branch pipe is connected to one of the feed pipes.

[0010] Furthermore, the branch pipe is provided with a valve.

[0011] Furthermore, the suction hole includes a first end located inside the groove portion and a second end located outside the groove portion; the second turntable can be in a first state and a second state, in the first state, the first notch portion of the second turntable faces the second end of a suction hole of the first turntable, and each second notch portion of the second turntable is located between two adjacent suction holes and the distance to the two suction holes is equal; in the second state, each second notch portion of the second turntable faces the second end of a suction hole of the first turntable.

[0012] Furthermore, the first state is used for sowing corn, and the second state is used for sowing peas.

[0013] Furthermore, the area of the air suction holes actually used in the first state is greater than the area of the air suction holes actually used in the second state.

[0014] Furthermore, the turntable fixing unit includes an end fixing plate fixed to the end of the rotating shaft and a pressing ring connected to the end fixing plate via a first spring.

[0015] Furthermore, the second turntable has a central hole through which the rotation shaft passes.

[0016] Furthermore, the pressing ring has a plurality of hemispherical protrusions distributed in a circular shape with equal intervals, and the second turntable has a plurality of hemispherical grooves distributed in a circular shape with equal intervals.

[0017] Furthermore, the number of the hemispherical protrusions, the hemispherical grooves, the air suction holes, the first notch portions and the second notch portions are equal and are distributed in a circular shape with equal intervals.

[0018] Furthermore, the first notch portions and the second notch portions are alternately distributed, and the distances between each first notch portion and two adjacent second notch portions are equal.

[0019] Furthermore, there are 20 air suction holes.

[0020] Furthermore, a scraper plate is provided at the top end of the discharge pipe; a negative pressure space is formed between the first turntable and the second shell. During the rotation of the first turntable, the suction hole located above the discharge pipe and closest to the top end of the discharge pipe, the suction hole located at the lowest position, and all the suction holes between the two are not connected to the negative pressure space.

[0021] Furthermore, the first shell is connected to a first material limiting unit via a first connecting rod, and the first material limiting unit includes a first arc rod and two first material limiting blocks connected to the first arc rod; the first shell is connected to a second material limiting unit via a second connecting rod, and the second material limiting unit includes a second arc rod and two second material limiting blocks connected to the second arc rod.

[0022] Thus, the first and second limiting material blocks can prevent the air suction holes from adsorbing two seeds at a time.

[0023] Furthermore, the first shell has a socket portion for inserting a discharge pipe; the first shell includes a first end plate, a first conical plate connected to the first end plate, a circumferential plate connected to the first conical plate, and a first flange plate connected to the circumferential plate; the second shell includes a second end plate, a second conical plate connected to the second end plate and having a notch, a second flange plate connected to the second conical plate and having a notch, a through-tube connected to the second end plate and passed by the rotating shaft, a first connecting plate connected to the second conical plate, a second connecting plate connected to the second conical plate, and an arc panel connecting the first connecting plate and the second connecting plate.

[0024] Furthermore, the seed-seeding unit also includes a frame, a plurality of serrations are provided between two of the first notches of the second turntable, and each second notch at a circumferential position between the two first notches and between two adjacent first notches has the serrations; one side of the first notch of one of the two first notches has the serrations, and the other side has a detection groove, and the detection groove includes a slot and an opening connected to the slot; the circumferential position of the first turntable also has a positioning groove; a positioning mechanism and a driving mechanism are installed on the frame, and the positioning mechanism includes an electric lifting rod, a U-shaped lifting seat driven by the electric lifting rod, a vertical guide rod fixed to the U-shaped lifting seat, a lifting block connected to the U-shaped lifting seat through a second spring, and a lifting block fixedly connected to the lifting block and capable of abutting the first turntable The top end of the driving member is engaged with the driving member, and the driving member is engaged with the driving member, and the driving member is engaged with the driving member, and the driving member is engaged with the driving member, and the driving member is engaged with the driving member.

[0025] Thus, the driving rod can drive the second rotating disk to rotate within the first rotating disk, thereby realizing position switching between the first state and the second state.

[0026] Furthermore, when the positioning plate is inserted into the positioning groove, the insertion channel is in a vertical state.

[0027] Furthermore, there are eight serrations.

[0028] Furthermore, the feed pipe is connected to the first end plate; the suction pipe is connected to the second end plate; and the first shell and the second shell are both fixed to the frame.

[0029] Furthermore, the end fixing plate and the rotating shaft are connected by fixing bolts.

[0030] Furthermore, there is a gap between the first flange plate and the first turntable, and the gap is less than 1 mm.

[0031] Furthermore, there is a gap between the second flange plate and the second turntable, and the gap is less than 1 mm.

[0032] Furthermore, the discharge pipe includes a discharge vertical pipe, a connecting elbow connected to the discharge vertical pipe, and a discharge inclined pipe connected to the connecting elbow.

[0033] Furthermore, the rotating shaft passes through the pressing ring.

[0034] The present application also discloses a seeding device, including a first shell, a second shell, a first turntable, a second turntable installed at the first turntable, a rotating shaft connected to the first turntable, a first motor that drives the rotating shaft to rotate, a negative pressure fan connected to the second shell through a suction pipe, a discharge pipe, and a feed pipe connected to the first shell. The first turntable has a groove portion, and the second turntable is installed at the groove portion through a turntable fixing unit. The first turntable has a plurality of suction holes, and the second turntable has a plurality of first notch portions and a plurality of second notch portions. A portion of the suction holes is located inside the groove portion, and another portion is located outside the groove portion.

[0035] Furthermore, the suction hole includes a first end located inside the groove portion and a second end located outside the groove portion; the second turntable can be in a first state and a second state, in the first state, the first notch portion of the second turntable faces the second end of a suction hole of the first turntable, and each second notch portion of the second turntable is located between two adjacent suction holes and the distance to the two suction holes is equal; in the second state, each second notch portion of the second turntable faces the second end of a suction hole of the first turntable.

[0036] Furthermore, the first state is used for sowing corn, and the second state is used for sowing peas.

[0037] Furthermore, the area of the air suction holes actually used in the first state is greater than the area of the air suction holes actually used in the second state.

[0038] Furthermore, the turntable fixing unit includes an end fixing plate fixed to the end of the rotating shaft and a pressing ring connected to the end fixing plate via a first spring.

[0039] Furthermore, the second turntable has a central hole through which the rotation shaft passes.

[0040] Furthermore, the pressing ring has a plurality of hemispherical protrusions distributed in a circular shape with equal intervals, and the second turntable has a plurality of hemispherical grooves distributed in a circular shape with equal intervals.

[0041] Furthermore, the number of the hemispherical protrusions, the hemispherical grooves, the air suction holes, the first notch portions and the second notch portions are equal and are distributed in a circular shape with equal intervals.

[0042] Furthermore, the first notch portions and the second notch portions are alternately distributed, and the distances between each first notch portion and two adjacent second notch portions are equal.

[0043] Furthermore, a scraper plate is provided at the top end of the discharge pipe; a negative pressure space is formed between the first turntable and the second shell. During the rotation of the first turntable, the suction hole located above the discharge pipe and closest to the top end of the discharge pipe, the suction hole located at the lowest position, and all the suction holes between the two are not connected to the negative pressure space.

[0044] Therefore, when the seeds rotate with the first rotary disk to leave the negative pressure space, they can fall under the action of gravity, and due to the existence of the scraper plate, the seeds will definitely fall smoothly into the discharge pipe.

[0045] Furthermore, the first shell is connected to a first material limiting unit via a first connecting rod, and the first material limiting unit includes a first arc rod and two first material limiting blocks connected to the first arc rod; the first shell is connected to a second material limiting unit via a second connecting rod, and the second material limiting unit includes a second arc rod and two second material limiting blocks connected to the second arc rod.

[0046] Furthermore, the first shell has a socket portion for inserting a discharge pipe; the first shell includes a first end plate, a first conical plate connected to the first end plate, a circumferential plate connected to the first conical plate, and a first flange plate connected to the circumferential plate; the second shell includes a second end plate, a second conical plate connected to the second end plate and having a notch, a second flange plate connected to the second conical plate and having a notch, a through-tube connected to the second end plate and passed by the rotating shaft, a first connecting plate connected to the second conical plate, a second connecting plate connected to the second conical plate, and an arc panel connecting the first connecting plate and the second connecting plate.

[0047] Furthermore, the seed-seeding device also includes a frame, a plurality of serrations are provided between two of the first notches of the second turntable, and each second notch at a circumferential position between the two first notches and between two adjacent first notches has the serrations; one side of the first notch of the two first notches has the serrations, and the other side has a detection groove, and the detection groove includes a slot and an opening connected to the slot; the circumferential position of the first turntable also has a positioning groove; a positioning mechanism and a driving mechanism are installed on the frame, and the positioning mechanism includes an electric lifting rod, a U-shaped lifting seat driven by the electric lifting rod, a vertical guide rod fixed to the U-shaped lifting seat, a lifting block connected to the U-shaped lifting seat through a second spring, and a lifting block fixedly connected to the lifting block and capable of abutting the first turntable The top end of the driving member is engaged with the driving member, and the driving member is engaged with the driving member, and the driving member is engaged with the driving member, and the driving member is engaged with the driving member, and the driving member is engaged with the driving member.

[0048] Furthermore, the feed pipe is connected to the first end plate; the suction pipe is connected to the second end plate; and the first shell and the second shell are both fixed to the frame.

[0049] Furthermore, the end fixing plate and the rotating shaft are connected by fixing bolts.

[0050] Furthermore, there is a gap between the first flange plate and the first turntable, and the gap is less than 1 mm.

[0051] Furthermore, there is a gap between the second flange plate and the second turntable, and the gap is less than 1 mm.

[0052] Furthermore, the discharge pipe includes a discharge vertical pipe, a connecting elbow connected to the discharge vertical pipe, and a discharge inclined pipe connected to the connecting elbow.

[0053] Furthermore, the rotating shaft passes through the pressing ring.

[0054] The present application also discloses a sowing device, comprising any one of the above-mentioned seeding devices.

[0055] Beneficial effects:

[0056] 1. In the sowing device of the present application, seeds can be effectively distributed to each seed sowing unit. Through the cooperation of the negative pressure fan and the first turntable, it is ensured that the seeds can accurately fall into the feed pipe, thereby improving the accuracy of sowing.

[0057] 2. The sowing device of the present application realizes automatic switching of sowing different types of corn and pea seeds through the positioning mechanism and the driving mechanism, without the need for manual switching, thereby improving sowing efficiency and flexibility.

[0058] 3. The seeding device of the present application utilizes the serrated portion and the detection groove in conjunction with a pressure sensor to prompt manual maintenance when the state cannot be switched, thereby ensuring the normal use and long-term stability of the seeding device. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] Figure 1 Schematic diagram of the seeding device;

[0060] Figure 2 is a schematic diagram of the second turntable in a first state;

[0061] Figure 3 This is a schematic diagram of the positioning plate abutting against the circumferential surface of the first turntable;

[0062] Figure 4 A schematic diagram of the positioning plate being inserted into the positioning groove of the first turntable;

[0063] Figure 5 This is an enlarged view of area A;

[0064] Figure 6 This is a schematic diagram of the driving rod driving the second turntable to rotate;

[0065] Figure 7 Schematic diagram of the driving rod driving the sawtooth portion to drive the second turntable;

[0066] Figure 8 This is an enlarged view of area B;

[0067] Figure 9 This is a schematic diagram of the second rotating disk switching to the second state;

[0068] Figure 10 This is an enlarged view of area C;

[0069] Figure 11 Schematic diagram of the drive rod inserted into the detection groove;

[0070] Figure 12 This is an enlarged view of area D;

[0071] Figure 13 This is a schematic diagram of the separation of the seed metering device components from the first perspective;

[0072] Figure 14 This is an enlarged view of area E;

[0073] Figure 15 This is a schematic diagram of the separation of the seed metering device components from a second perspective;

[0074] Figure 16 This is an enlarged view of area F;

[0075] Figure 17 This is an enlarged view of area G;

[0076] To make it clear, Figure 2-11 In the embodiment, the first shell is hidden.

[0077] Explanation of reference numerals: first housing 1; feeding pipe 1.1; first connecting rod 1.2; second connecting rod 1.3; socket portion 1.4; first end plate 1.5; first frustum-shaped plate 1.6; circumferential plate 1.7; first flange plate 1.8; second housing 2; suction pipe 2.1; second end plate 2.2; second frustum-shaped plate 2.3; second flange plate 2.4; through-tube 2.5; first connecting plate 2.6; second connecting plate 2.7; curved plate 2.8; first turntable 3; rotating shaft 3.1; suction hole 3.2; positioning groove 3.3; second turntable 4; first notch portion 4.1; second notch portion 4.2; center hole 4.3; hemispherical groove 4.4; serrated portion 4.5; detection groove 4.6 ; Insertion channel 4.7; Feeding tube 5; Scraper plate 5.1; End fixing plate 6.1; First spring 6.2; Pressing ring 6.3; Hemispherical protrusion 6.4; Fixing bolt 6.5; First curved rod 7.1; First material limit block 7.2; Second curved rod 8.1; Second material limit block 8.2; Frame 9; Electric lifting rod 10.1; U-shaped lifting seat 10.2; Vertical guide rod 10.3; Second spring 10.4; Lifting block 10.5; Positioning plate 10.6; Second motor 11.1; Drive gear 11.2; Vertical protrusion 11.3; Vertical guide groove 11.4; Rack 11.5; Pressure sensor 12; Third spring 12.1; Drive rod 12.2; Vertical guide plate 12.3. DETAILED DESCRIPTION

[0078] The following describes embodiments of the present invention in detail, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and are not to be construed as limiting the present invention.

[0079] Example 1

[0080] As shown in the figure, Example 1 discloses a sowing device that can be used for sowing corn and peas, including a mobile carrier, a seed storage box, a seed distribution unit and a plurality of seed sowing units, wherein the seed distribution unit can distribute the seeds in the seed storage box to each seed sowing unit, the seed sowing unit includes a furrowing unit, a seeding unit and a soil covering unit, and the seeding unit includes a first shell 1, a second shell 2, a first turntable 3, a second turntable 4 installed at the first turntable 3, a rotating shaft 3.1 connected to the first turntable 3, and a driving shaft 3. .1 rotates a first motor (not shown in the figure), a negative pressure fan (not shown in the figure) connected to the second shell 2 through the suction pipe 2.1, a discharge pipe 5 and a feed pipe 1.1 connected to the first shell 1, the first turntable 3 has a groove portion, the second turntable 4 is installed at the groove portion through a turntable fixing unit, the first turntable 3 has a plurality of suction holes 3.2, the second turntable 4 has a plurality of first notch portions 4.1 and a plurality of second notch portions 4.2, a part of the suction hole 3.2 is located in the groove portion, and the other part is located outside the groove portion. The air suction hole 3.2 includes a first end located within the groove portion and a second end located outside the groove portion; the second turntable 4 can be in a first state and a second state. In the first state, the first notch portion 4.1 of the second turntable 4 faces the second end of one of the air suction holes 3.2 of the first turntable, and each second notch portion 4.2 of the second turntable 4 is located between two adjacent air suction holes 3.2 and is equidistant from the two air suction holes 3.2; in the second state, each second notch portion 4.2 of the second turntable 4 faces the second end of one of the air suction holes 3.2 of the first turntable 3. The turntable fixing unit includes an end fixing plate 6.1 fixed to the end of the rotating shaft 3.1 and a pressing ring 6.3 connected to the end fixing plate 6.1 via a first spring 6.2. The second turntable 4 has a central hole 4.3 through which the rotating shaft 3.1 passes; the pressing ring 6.3 has a plurality of hemispherical protrusions 6.4 distributed in a circular pattern at equal intervals, and the second turntable 4 has a plurality of hemispherical grooves 4.4 distributed in a circular pattern at equal intervals; the hemispherical protrusions 6.4, hemispherical grooves 4.4, suction holes 3.2, first notches 4.1, and second notches 4.2 are equal in number and are distributed in a circular pattern at equal intervals; the first notches 4.1 and second notches 4.2 are alternately distributed, with each first notch 4.1 being spaced equidistant from the adjacent second notches 4.2. The top of the feed tube 5 has a scraper 5.1; a negative pressure space is formed between the first turntable 3 and the second housing 2. During rotation of the first turntable 3, the suction holes 3.2 located above the feed tube 5 and closest to the top of the feed tube 5, the suction hole 3.2 located at the lowest position, and all suction holes 3.2 between the two are disconnected from the negative pressure space.The first shell 1 is connected to a first material limiting unit via a first connecting rod 1.2, and the first material limiting unit includes a first curved rod 7.1 and two first material limiting blocks 7.2 connected to the first curved rod 7.1; the first shell 1 is connected to a second material limiting unit via a second connecting rod 1.3, and the second material limiting unit includes a second curved rod 8.1 and two second material limiting blocks 8.2 connected to the second curved rod 8.1. The first shell 1 has a socket portion 1.4 for inserting the discharge pipe 5; the first shell 1 includes a first end plate 1.5, a first conical plate 1.6 connected to the first end plate 1.5, a circumferential plate 1.7 connected to the first conical plate 1.6, and a first flange plate 1.8 connected to the circumferential plate 1.7; the second shell 2 includes a second end plate 2.2, a second conical plate 2.3 connected to the second end plate 2.2 and having a notch, a second flange plate 2.4 connected to the second conical plate 2.3 and having a notch, a through-tube 2.5 connected to the second end plate 2.2 and passed through by the rotating shaft 3.1, a first connecting plate 2.6 connected to the second conical plate 2.3, a second connecting plate 2.7 connected to the second conical plate 2.3, and a curved plate 2.8 connecting the first connecting plate 2.6 and the second connecting plate 2.7.

[0081] The seeding unit further includes a frame 9, wherein the second rotary disk 4 has a plurality of serrated portions 4.5 between two first notches 4.1, and each second notch 4.2 at a circumferential position between the two first notches and between two adjacent first notches 4.1 has the serrated portion 4.5; one side of one of the two first notches 4.1 has the serrated portion 4.5, and the other side has a detection groove 4.6, wherein the detection groove 4.6 includes a slot and an opening connected to the slot. The first turntable 3 also has a positioning groove 3.3 at the circumferential position; the frame 9 is equipped with a positioning mechanism and a driving mechanism, the positioning mechanism includes an electric lifting rod 10.1, a U-shaped lifting seat 10.2 driven by the electric lifting rod 10.1, a vertical guide rod 10.3 fixed to the U-shaped lifting seat 10.2, a lifting block 10.5 connected to the U-shaped lifting seat 10.2 through a second spring 10.4, and a lifting block 10.5 fixedly connected to the lifting block 10.5, which can abut the circumferential surface of the first turntable 3 and can be inserted into the positioning groove. The positioning plate 10.6 is positioned in the groove 3.3, and the lifting block 10.5 has a first guide hole that cooperates with the vertical guide rod 10.3; the driving mechanism includes a second motor 11.1, a driving gear 11.2 driven by the second motor 11.1, a vertical protrusion 11.3 fixed to the frame 9, a vertical guide groove 11.4 located at the vertical protrusion, a vertical guide rail that cooperates with the vertical guide groove, and a rack 11.5 fixedly connected to the vertical guide rail and meshing with the driving gear 11.2, and the top of the rack 11.5 has a mounting A groove is provided in which a pressure sensor 12 is installed. The pressure sensor 12 is connected to a drive rod 12.2 via a third spring 12.1. The bottom end of the drive rod 12.2 is connected to a vertical guide plate 12.3. The mounting groove has a second guide hole that cooperates with the vertical guide plate 12.3. The top end of the drive rod 12.2 can abut the serrated portion 4.5 and can be inserted into the detection groove 4.6. The first turntable 3 has an insertion channel 4.7 that can be inserted by the rack 11.5.

[0082] In the sowing device of the present application, seeds can be distributed into the feed pipes of each seed sowing unit, so that the seeds fall into the space between the first housing and the first rotary disk. Under the action of the negative pressure fan and driven by the first motor, the first rotary disk rotates, so that the seeds are sucked into the suction holes. After reaching the top of the discharge tube, the suction holes leave the negative pressure area, so that the seeds fall into the discharge tube. The scraper can ensure that the seeds fall into the discharge tube. In addition, under the action of the furrowing unit and the soil covering unit, the seeds can be sown.

[0083] The first rotating disk of the present application is also equipped with a second rotating disk. The second rotating disk is pressed and fixed by a pressing ring, and the hemispherical protrusion and the hemispherical groove cooperate to achieve the fixation of the second rotating disk. And by the second rotating disk being in the first state or the second state, it can be used for sowing corn and peas. And this state switching does not need to be performed manually. As shown in the figure, when it is necessary to switch the state, the electric lifting rod can be raised so that the positioning plate abuts the circumferential surface of the first rotating disk. The first rotating disk is slowly rotated under the drive of the first motor until the positioning plate is embedded in the positioning groove. The first rotating disk stops rotating. Then the driving gear drives the rack to rise, abutting the first notch (or the second notch), then descend, and then rise again to abut the serrated portion. This is repeated several times, thereby driving the second rotating disk to rotate, so that the hemispherical protrusion disengages the hemispherical groove. After the state switching is completed, the hemispherical protrusion is again embedded in the hemispherical groove. This allows sowing of different types of seeds. And because there are multiple serrated portions, manual intervention is not required for the next switching. Until the serrated portion is used up and the state is switched again, the driving rod will be inserted into the detection groove, so that the rack rises the same distance. Since the driving rod has enough rising space in the detection groove, the pressure sensor's measured value is very small, so it is judged that the state switching cannot be performed at this time. At this time, manual intervention is required to reset the second turntable, so that after the state of the second turntable is switched several times, manual maintenance must be performed to ensure the normal use of the seeding device.

[0084] Example 2

[0085] Example 2 discloses a seeding device that can be used for sowing corn and peas, including a first shell 1, a second shell 2, a first turntable 3, a second turntable 4 installed at the first turntable 3, a rotating shaft 3.1 connected to the first turntable 3, a first motor that drives the rotating shaft 3.1 to rotate, a negative pressure fan connected to the second shell 2 through a suction pipe 2.1, a discharge pipe 5 and a feed pipe 1.1 connected to the first shell 1, the first turntable 3 has a groove portion, the second turntable 4 is installed at the groove portion through a turntable fixing unit, the first turntable 3 has a plurality of suction holes 3.2, the second turntable 4 has a plurality of first notch portions 4.1 and a plurality of second notch portions 4.2, a part of the suction hole 3.2 is located inside the groove portion, and the other part is located outside the groove portion. The suction hole 3.2 includes a first end located inside the groove portion and a second end located outside the groove portion; the second turntable 4 can be in a first state and a second state, in the first state, the first notch portion 4.1 of the second turntable 4 faces the second end of a suction hole 3.2 of the first turntable, and each second notch portion 4.2 of the second turntable 4 is located between two adjacent suction holes 3.2 and the distance to the two suction holes 3.2 is equal; in the second state, each second notch portion 4.2 of the second turntable 4 faces the second end of a suction hole 3.2 of the first turntable 3.

[0086] Example 3

[0087] Example 3 discloses a sowing device that can be used for sowing corn and peas, including the seeding device described in Example 2.

[0088] Although the present invention has been illustrated and described with respect to the preferred embodiments, it will be understood by those skilled in the art that various changes and modifications may be made to the present invention without departing from the scope of the present invention as defined by the claims.

Claims

1. A sowing device capable of being used for sowing corn and peas, characterized in that: It includes a mobile carrier, a seed storage box, a seed distribution unit and multiple seed sowing units. The seed distribution unit can distribute the seeds in the seed storage box to each seed sowing unit. The seed sowing unit includes a furrowing unit, a seed discharge unit and a soil covering unit. The seed discharge unit includes a first shell, a second shell, a first turntable, a second turntable installed at the first turntable, a rotating shaft connected to the first turntable, a first motor that drives the rotating shaft to rotate, a negative pressure fan connected to the second shell through an air suction pipe, a feed pipe and a feed pipe connected to the first shell. The first turntable has a groove portion, and the second turntable is installed at the groove portion through a turntable fixing unit. The first turntable has a plurality of air suction holes, and the second turntable has a plurality of first notch portions and a plurality of second notch portions. A portion of the air suction holes is located in the groove portion, and another portion is located outside the groove portion.

2. The sowing device capable of being used for sowing corn and peas according to claim 1, characterized in that: The suction hole includes a first end located inside the groove portion and a second end located outside the groove portion; the second turntable can be in a first state and a second state, in the first state, the first notch portion of the second turntable faces the second end of a suction hole of the first turntable, and each second notch portion of the second turntable is located between two adjacent suction holes and the distance to the two suction holes is equal; in the second state, each second notch portion of the second turntable faces the second end of a suction hole of the first turntable.

3. The sowing device capable of being used for sowing corn and peas according to claim 2, characterized in that: The turntable fixing unit includes an end fixing plate fixed to the end of the rotating shaft and a pressing ring connected to the end fixing plate through a first spring; the second turntable has a central hole passed through by the rotating shaft; the pressing ring has a plurality of hemispherical protrusions distributed in a ring shape with equal spacing, and the second turntable has a plurality of hemispherical grooves distributed in a ring shape with equal spacing; the hemispherical protrusions, hemispherical grooves, air suction holes, first notches and second notches are equal in number and are distributed in a ring shape with equal spacing; the first notches and the second notches are alternately distributed, and the spacing between each first notch and two adjacent second notches is equal.

4. The sowing device capable of being used for sowing corn and peas according to claim 3, characterized in that: A scraper plate is provided at the top end of the feed pipe; a negative pressure space is formed between the first turntable and the second shell. During the rotation of the first turntable, the suction hole located above the feed pipe and closest to the top end of the feed pipe, the suction hole located at the lowest position and all the suction holes between the two are not connected to the negative pressure space.

5. The sowing device capable of being used for sowing corn and peas according to claim 3, characterized in that: The first shell is connected to a first material limiting unit via a first connecting rod, and the first material limiting unit includes a first arc rod and two first material limiting blocks connected to the first arc rod; the first shell is connected to a second material limiting unit via a second connecting rod, and the second material limiting unit includes a second arc rod and two second material limiting blocks connected to the second arc rod.

6. The sowing device capable of being used for sowing corn and peas according to claim 3, characterized in that: The first shell has a socket portion for inserting a feeding pipe; the first shell includes a first end plate, a first conical plate connected to the first end plate, a circumferential plate connected to the first conical plate, and a first flange plate connected to the circumferential plate; the second shell includes a second end plate, a second conical plate connected to the second end plate and having a notch, a second flange plate connected to the second conical plate and having a notch, a through tube connected to the second end plate and passed by a rotating shaft, a first connecting plate connected to the second conical plate, a second connecting plate connected to the second conical plate, and an arc plate connecting the first connecting plate and the second connecting plate.

7. The sowing device capable of being used for sowing corn and peas according to claim 3, characterized in that: The seeding unit also includes a frame, a plurality of serrations are provided between two of the first notches of the second turntable, and each second notch at a circumferential position between the two first notches and between two adjacent first notches are provided with the serrations; one side of one of the two first notches is provided with the serrations, and the other side is provided with a detection groove, and the detection groove includes a slot and an opening connected to the slot; the circumferential position of the first turntable is also provided with a positioning groove; a positioning mechanism and a driving mechanism are installed on the frame, and the positioning mechanism includes an electric lifting rod, a U-shaped lifting seat driven by the electric lifting rod, a vertical guide rod fixed to the U-shaped lifting seat, a lifting block connected to the U-shaped lifting seat through a second spring, and a lifting block fixedly connected to the lifting block and capable of abutting against the circumference of the first turntable. The cam is an angular channel formed on a pair of camshafts, wherein the camshafts are connected to a pair of camshafts which are connected by a second spring to move the camshafts toward the side of the drive shaft. The camshafts are connected by a second spring to move the camshafts toward the side of the drive shaft. The camshafts are connected by a second spring to move the camshafts toward the side of the drive shaft.

8. A seeding device capable of being used for sowing corn and peas, characterized in that: The invention comprises a first shell, a second shell, a first turntable, a second turntable installed at the first turntable, a rotating shaft connected to the first turntable, a first motor driving the rotating shaft to rotate, a negative pressure fan connected to the second shell through an air suction pipe, a discharge pipe and a feeding pipe connected to the first shell, the first turntable is provided with a groove portion, the second turntable is installed at the groove portion through a turntable fixing unit, the first turntable is provided with a plurality of air suction holes, the second turntable is provided with a plurality of first notch portions and a plurality of second notch portions, a part of the air suction holes is located in the groove portion, and another part is located outside the groove portion.

9. The seeding device for sowing corn and peas according to claim 8, characterized in that: The suction hole includes a first end located inside the groove portion and a second end located outside the groove portion; the second turntable can be in a first state and a second state, in the first state, the first notch portion of the second turntable faces the second end of a suction hole of the first turntable, and each second notch portion of the second turntable is located between two adjacent suction holes and the distance to the two suction holes is equal; in the second state, each second notch portion of the second turntable faces the second end of a suction hole of the first turntable.

10. A sowing device capable of being used for sowing corn and peas, characterized in that: A seeding device comprising the seeding device according to any one of claims 8 or 9.

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