Air-blowing centralized-discharging type direct seeding machine

Abstract

The invention discloses an air-blowing centralized-discharging type direct seeding machine which comprises a main body frame, a walking device, a seed separating device and a ditching and soil covering device, the ditching and soil covering device is connected with the main body frame through a lifting mechanism; the seed separating device comprises a seed box and a seed separating mechanism; the seed distribution mechanism comprises a fan, a central seed-metering device, a seed-metering driving mechanism, a conveying pipe and a seed distributor; one end of the conveying pipe is communicated with the fan, and the other end of the conveying pipe is communicated with the seed distributor; the upper end of the central seed-metering device is communicated with the lower end of the seed box, and the lower end of the central seed-metering device is communicated with the conveying pipe; the furrowing and soil covering device comprises a furrowing and soil covering frame and a furrowing and soil covering module, and the furrowing and soil covering module comprises a furrow opener and a soil covering mechanism. The direct seeding machine can realize ditching, seeding and soil covering functions, is rich in function, more convenient to operate and higher in working efficiency, can accurately control the seeding density, avoids the problems of seed overlapping, seed omission and the like, and ensures the uniformity of the seeding density.

Description

Technical Field

[0001] The invention relates to the technical field of agricultural machinery, and in particular to an air-blown direct-seeding machine. Background Art

[0002] The current trend of agricultural development is towards simplified and mechanized planting technology. For major food crops, such as rice, wheat, corn, etc., their development must be aimed at improving planting levels and reducing production costs. Direct seeding technology, as one of the more efficient planting modes, is widely recognized by farmers.

[0003] In farmland operations, furrowing, sowing and covering are common farming steps. However, existing agricultural machinery often has a single function, using a furrowing machine, a direct seeding machine and a covering machine to perform a single operation, which is inconvenient to use and cumbersome to operate, resulting in low operating efficiency. In addition, existing direct seeding machines usually use a hopper to directly discharge seeds for sowing, which cannot be accurately controlled and easily leads to problems such as seed overlap and omission. Summary of the invention

[0004] The purpose of the present invention is to overcome the above-mentioned problems and provide an air-blown collective direct seeding machine, which can realize the functions of furrowing, sowing and covering soil, has rich functions, is more convenient to operate, has higher working efficiency, can accurately control the sowing density, avoid problems such as seed overlapping and missing, and ensure the uniformity of sowing density.

[0005] The purpose of the present invention is achieved through the following technical solutions:

[0006] An air-blown collective seeding machine comprises a main frame, a walking device, a seed separation device and a furrowing and soil covering device arranged on the main frame; the furrowing and soil covering device is connected to the main frame through a lifting mechanism; the lifting mechanism is used to adjust the height of the furrowing and soil covering device; wherein,

[0007] The seeding device comprises a seed box for storing seeds arranged on the main frame and a seeding mechanism for discharging the seeds in the seed box into the sowing furrow; the seeding mechanism comprises a fan, a central seeding device, a seeding driving mechanism, a conveying pipe and a seeding device; one end of the conveying pipe is connected to the fan, and the other end of the conveying pipe is connected to the seeding device; the upper end of the central seeding device is connected to the lower end of the seed box, and the lower end of the central seeding device is connected to the conveying pipe; the seeding driving mechanism is used to drive the central seeding device to perform seeding;

[0008] The trenching and soil covering device comprises a trenching and soil covering frame and a trenching and soil covering module. The trenching and soil covering module comprises a trencher arranged on the trenching and soil covering frame for trenching a sowing trench and a soil covering mechanism for covering the soil in the sowing trench.

[0009] The working principle of the above-mentioned air-blown centralized direct seeding machine is:

[0010] During operation, the height of the furrowing and covering device is adjusted by the lifting mechanism, so that the furrowing and covering device can perform furrowing and covering operations at a suitable height; the walking device drives the air-blowing collective row direct seeding machine to move in the field. When moving, the furrowing device will open several sowing furrows on the ground, and the fan shaft in the fan drives the impeller to generate an airflow with a certain pressure, and the airflow is blown from the conveying pipe to the seed separator; at the same time, the seeding drive mechanism drives the seeding wheel on the central seeding device to move, and the seeds in the seed box will be discharged into the conveying pipe through the seeding wheel. Under the action of the airflow, the seeds enter the seed separator, and in the conveying pipe, the seeds are mixed with the flowing air to form an air-seed mixed flow, and the seeds are mixed with the flowing air and enter the seed separator. In the seed separator, the air-seed mixed flow is then introduced into the sowing furrow through the seeding pipe, and then the soil is covered in the sowing furrow by the covering mechanism to perform the covering operation, completing the entire sowing process. After sowing is completed, the lifting mechanism adjusts the height of the furrowing and covering device, lifts the furrowing and covering device, and separates it from the ground, so as to facilitate the walking of the air-blowing collective row direct seeding machine.

[0011] A preferred solution of the present invention, wherein the seed divider is an equidistant arc structure, including an umbrella-shaped shell, a seed dividing cavity arranged in the umbrella-shaped shell, and an inlet pipe arranged in the middle of the umbrella-shaped shell, the seed dividing cavity includes an umbrella-shaped arc cavity located at the upper end and an annular cavity located at the lower end, the lower end of the umbrella-shaped shell is provided with a plurality of seed dividing ports distributed circumferentially around its axis, the axis of the inlet pipe coincides with the axis of the umbrella-shaped shell, the seed dividing port is connected with the annular cavity; the upper end of the inlet pipe is connected with the umbrella-shaped arc cavity, and the lower end is connected with the conveying pipe. In the above structure, the seed dividing port is connected with a seed discharge pipe, the seeds in the seed box fall sequentially through the central seed discharger, and then the fan provides a stable airflow to transfer the seeds to the seed divider through the conveying pipe, the seeds in the conveying pipe are mixed with the flowing air, and enter the umbrella-shaped arc cavity through the inlet pipe so that the seeds and the airflow are evenly mixed, and then enter the annular cavity, and are evenly distributed and discharged from the plurality of seed dividing ports to the seed discharge pipe, and the seeds are transported to the corresponding sowing furrows through the seed discharge pipe.

[0012] Preferably, the bottom of the annular cavity is provided with a conical guide opening at a position corresponding to the seed sorting opening, and the top of the umbrella-shaped arc cavity is provided with a conical protrusion protruding downward, and the position of the conical protrusion corresponds to the position of the entry tube. The purpose is that the conical guide opening can better guide the seeds into the seed sorting opening, and the conical protrusion also forms a conical guide entrance at the top of the umbrella-shaped arc cavity, which facilitates the seeds to spread evenly around and achieves the effect of even seed sorting.

[0013] Preferably, the conveying pipe includes a horizontal pipe, a curved pipe and a vertical corrugated pipe; the fan, horizontal pipe, curved pipe, vertical corrugated pipe and inlet pipe are connected in sequence; the horizontal pipe is connected to the central seed metering device through a three-way pipe, and the vertical corrugated pipe is connected to the inlet pipe. When the fan is turned on, it will generate a certain air pressure, which causes the seeds to be sucked up from the three-way pipe and enter the horizontal pipe. The seeds are then sent into the curved pipe and into the vertical corrugated pipe. The airflow generated by the fan is mixed with the seeds and enters the seed divider together. In the seed divider, the seeds are evenly distributed and then fall into the pre-opened sowing furrow through the seed discharge pipe. Next, the covering mechanism will cover and suppress the seeds to ensure that the seeds are in close contact with the soil, which is conducive to the germination and growth of the seeds.

[0014] Preferably, the lifting mechanism includes four connecting rods arranged in parallel with each other and an electric push-pull rod; one end of the connecting rod is hinged to the main frame, and the other end is hinged to the trenching and covering frame; one end of the electric push-pull rod is hinged to the main frame, and the other end is hinged to the trenching and covering frame. By setting the telescopic movement of the electric push-pull rod, the lifting and lowering of the trenching and covering device is realized.

[0015] Furthermore, a main body support frame is provided on the main body frame, and the electric push-pull rod is hinged to the main body support frame.

[0016] Preferably, the trenching and covering modules are provided with multiple groups, and each group of trenching and covering modules also includes a vertical support plate, a transverse support plate and a shock absorber, wherein the vertical support plate is installed on the trenching and covering frame, one end of the transverse support plate is connected to the lower end of the vertical support plate, and the other end is connected to the covering mechanism; the trencher is arranged on the transverse support plate, and the shock absorber is hinged between the vertical support plate and the trencher. The number of trenching and covering modules can be adjusted according to the width of the plot, so as to achieve the desired number of trenches to be opened, the vertical support plate is connected to the trenching and covering frame by U-shaped bolts, the vertical support plate is connected to the transverse support plate by bolts, the shock absorber is connected to the vertical support plate by a lifting ear, and the lifting ear is connected to the vertical support plate by bolts, the upper end of the trencher is provided with a shock absorber connecting plate, the shock absorber connecting plate is connected to the trencher by bolts, one end of the shock absorber is connected to the shock absorber connecting plate, and the other end is connected to the lifting ear, so as to achieve the effect of mutual fixing.

[0017] Preferably, the soil covering mechanism comprises a fixed outer tube fixed on the transverse support plate, a height adjustment member sleeved in the fixed outer tube, an adjustment hand wheel arranged at the upper end of the height adjustment member, and a soil covering wheel arranged at the lower end of the height adjustment member. The height of the soil covering wheel can also be adjusted by adjusting the hand wheel, which is highly flexible and can adjust the soil covering height.

[0018] Preferably, the seeding drive mechanism includes a seeding drive motor and a transmission rod; the seed box is connected to the main frame via two side plates, the transmission rod is rotatably arranged between the two side plates, the middle of the transmission rod is connected to the central seeding device, and the drive motor is installed on one of the side plates to drive the transmission rod to rotate. In the above structure, the transmission rod is connected to the side plates via bearings, the seeding drive motor drives the transmission rod to rotate, and drives the seeding wheel of the central seeding device to rotate, thereby realizing the seeding function.

[0019] Preferably, the walking device includes a wheel arranged at the lower end of the main frame and a supporting suspension mechanism arranged between the main frame and the wheel. In the above structure, the walking of the air-blown concentrated row type live broadcast machine can be realized.

[0020] Preferably, a support assembly for supporting the delivery pipe is provided between the main frame and the delivery pipe, the support assembly includes an upper support frame and a lower support frame, the lower support frame is connected to the main frame, the upper support frame is connected to the delivery pipe, and the upper support frame and the lower support frame are adjustable. By adjusting the position between the upper support frame and the lower support frame, the height of the delivery pipe can be adjusted, thereby improving the installation flexibility of the delivery pipe.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. The air-blown collective direct seeding machine of the present invention can realize the functions of furrowing, sowing and soil covering by arranging a furrow opener, a seed separation device and a soil covering mechanism. It has rich functions, is more convenient to operate and has higher working efficiency.

[0023] 2. The air-blown collective-row direct seeding machine in the present invention has efficient sowing capability. The air-blown collective-row direct seeding machine adopts airflow control technology to blow seeds to the seed separator through a fan, and the seeds can be quickly and evenly blown to the field through the seed separator. The sowing speed far exceeds the traditional manual sowing and traditional mechanical sowing methods. This efficient sowing capability not only shortens the sowing cycle, but also reduces the impact of uncontrollable factors such as weather changes on the sowing progress, thereby ensuring the smooth implementation of the crop planting plan.

[0024] 3. The air-blown collective row direct seeding machine in the present invention has the advantage of accurately controlling the sowing density; the air-blown collective row direct seeding machine can achieve accurate control of the amount of seeds put in by accurately adjusting the intensity and direction of the airflow. This precise control not only avoids problems such as seed overlap and omission, but also ensures the uniformity of the sowing density, providing a good growth environment for the later growth of crops. At the same time, by adjusting the sowing density, it can also be personalized according to factors such as soil fertility and climatic conditions to further improve the yield and quality of crops.

[0025] 4. The air-blown collective row direct seeding machine of the present invention has wide adaptability. It is not only suitable for sowing rice, but can also be adjusted according to needs to adapt to the sowing needs of different crops and different terrains, such as corn, wheat, etc. This wide adaptability makes the air-blown collective row direct seeding machine have high application value in agricultural production and can meet the planting needs of different regions. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a three-dimensional structural schematic diagram of one specific implementation mode of an air-blown concentrated direct seeding machine in the present invention.

[0027] Figure 2 It is a schematic diagram of the three-dimensional structure of the seed separation device in the present invention.

[0028] Figure 3 It is a schematic diagram of the three-dimensional structure of the seed separation mechanism in the present invention.

[0029] Figure 4 It is a schematic diagram of the three-dimensional structure of the seed divider in the present invention.

[0030] Figure 5 It is a cross-sectional view of the seed divider in the present invention.

[0031] Figure 6 It is a schematic diagram of the three-dimensional structure of the trenching and soil covering device in the present invention.

[0032] Figure 7 It is a schematic diagram of the three-dimensional structure of the trenching and soil covering module in the present invention.

[0033] Figure 8 It is a schematic diagram of the three-dimensional structure of the seeding wheel of the central seeding device in the present invention. DETAILED DESCRIPTION

[0034] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described below in conjunction with embodiments and drawings, but the embodiments of the present invention are not limited thereto.

[0035] See also Figure 1-Figure 6 The present embodiment discloses an air-blown collective seeding machine, which can achieve uniform mixing and distribution of seeds through airflow, and comprises a main frame 1, a walking device arranged on the main frame 1, a seed separation device 2 and a furrowing and soil covering device 8; the furrowing and soil covering device 8 is connected to the main frame 1 through a lifting mechanism; the lifting mechanism is used to adjust the height of the furrowing and soil covering device 8.

[0036] See also Figure 1-Figure 3The seeding device 2 includes a seed box 21 for storing seeds arranged on the main frame 1 and a seeding mechanism 24 for discharging the seeds in the seed box 21 into the sowing furrow; the seeding mechanism 24 includes a fan 248, a central seeding device 2410, a seeding driving mechanism, a conveying pipe and a seeding device 241; one end of the conveying pipe is connected to the fan 248, and the other end of the conveying pipe is connected to the seeding device 241; the upper end of the central seeding device 2410 is connected to the lower end of the seed box 21, and the lower end of the central seeding device 2410 is connected to the conveying pipe; the seeding driving mechanism is used to drive the central seeding device 2410 to sow seeds. The seeding device 2 uses the power of airflow to continuously and stably convey the seeds discharged by the central seeding device 2410 to the sowing furrow, which can not only improve the sowing efficiency, but also reduce the seed breakage rate.

[0037] See also Figure 1-Figure 3 The seed box 21 is used to store rice seeds. The seed box 21 of the air-blown collective direct seeding machine is a container for storing rice seeds, which is located at the upper part of the direct seeding machine. Its main function is to provide sufficient seed supply to ensure that the direct seeding machine can continuously and stably discharge seeds during operation. The seeds of this embodiment can also be corn, wheat, etc.

[0038] See also Figure 1 and Figure 6-Figure 7 The trenching and soil covering device 8 comprises a trenching and soil covering frame 811 and a trenching and soil covering module, wherein the trenching and soil covering module comprises a trenching device 83 for trenching and soil covering frame 811 and a soil covering mechanism for covering the soil in the trenching and soil covering. The above mechanisms work together to ensure that the seeds are accurately sown into the soil and covered with an appropriate amount of soil layer, thereby providing a suitable environment for the germination and growth of the seeds.

[0039] See also Figure 1 and Figure 6-Figure 7 , the furrowing and soil covering device 8 is used to complete furrowing, sowing, soil covering and pressing in the field; furrowing: when the air-blown collective row direct seeding machine moves forward, the furrow opener 83 cuts into the soil to form a sowing furrow. Sowing: at the same time, the seeds are sown into the sowing furrow through the seed separation device 2. Soil covering: then, the soil covering wheel 84 of the soil covering mechanism rotates to cover the soil on both sides of the sowing furrow onto the sowing furrow to ensure that the seeds are completely covered. Pressing: finally, the pressing device compacts the soil after covering to provide a suitable environment for seed germination.

[0040] See also Figure 1 and Figure 6-Figure 7 The furrow opener 83 is a device on the direct seeding machine for opening a sowing furrow in the field. In the air-blown collective row direct seeding machine, the furrow opener 83 plays a particularly important role, which not only ensures that the seeds can fall into the furrow accurately, but also ensures that the depth and width of the furrow are moderate, so as to facilitate the growth and development of the seeds.

[0041] join Figure 1-Figure 5 The seed divider 241 is an equidistant arc structure, including an umbrella-shaped shell 241-1, a seed dividing chamber arranged in the umbrella-shaped shell 241-1, and an inlet pipe 241-2 arranged in the middle of the umbrella-shaped shell 241-1, the seed dividing chamber includes an umbrella-shaped arc chamber 241-3 located at the upper end and an annular chamber 241-4 located at the lower end, and the lower end of the umbrella-shaped shell 241-1 is provided with a plurality of seed dividing ports 241-5 distributed in a circle around its axis, the axis of the inlet pipe 241-2 coincides with the axis of the umbrella-shaped shell 241-1, and the seed dividing port 241-5 is communicated with the annular chamber 241-4; the upper end of the inlet pipe 241-2 is communicated with the umbrella-shaped arc chamber 241-3, and the lower end is communicated with the conveying pipe. In the above structure, the seeding port 241-5 is connected to a seeding tube, and the seeds in the seed box 21 fall down in sequence through the central seeding device 2410, and then the fan 248 provides a stable airflow to transfer the seeds to the seeding device 241 through the conveying pipe. The seeds in the conveying pipe are mixed with the flowing air, and enter the umbrella-shaped arc cavity 241-3 through the inlet pipe 241-2 so that the seeds and the airflow are evenly mixed, and then enter the annular cavity 241-4, and are evenly distributed and discharged from multiple seeding ports 241-5 to the seeding tube, and the seeds are transported to the corresponding sowing furrows through the seeding tube.

[0042] join Figure 1-Figure 5 The bottom of the annular cavity 241-4 is provided with a conical guide opening 241-6 at a position corresponding to the seeding opening 241-5, and the top of the umbrella-shaped arc cavity 241-3 is provided with a conical protrusion 241-7 protruding downward, and the position of the conical protrusion 241-7 corresponds to the position of the inlet tube 241-2. The purpose is that the conical guide opening 241-6 can better guide the seeds into the seeding opening 241-5, and the conical protrusion 241-7 also forms a conical guide entrance at the top of the umbrella-shaped arc cavity 241-3, so that the seeds are evenly spread around, and the effect of even seeding is achieved.

[0043] join Figure 1-Figure 5 The number of the seeding ports 241-5 corresponds to the number of the sowing furrows, so as to realize synchronous sowing in multiple sowing furrows. In this embodiment, the number of the seeding ports 241-5 is six, and the number of the seeding tubes is also six. The seeds are respectively discharged into different sowing furrows through the seeding tubes, so as to improve the sowing efficiency.

[0044] join Figure 1-Figure 3, the conveying pipe includes a horizontal pipe 244, a curved pipe 243 and a vertical corrugated pipe 242; the fan 248, the horizontal pipe 244, the curved pipe 243, the vertical corrugated pipe 242 and the inlet pipe 241-2 are connected in sequence; the horizontal pipe 244 is connected to the central seed metering device 2410 through a three-way pipe 247, and the vertical corrugated pipe 242 is connected to the inlet pipe 241-2. When the fan 248 is turned on, it will generate a certain air pressure, which makes the seeds sucked up from the three-way pipe 247 and enter the horizontal pipe 244. The seeds are then sent into the curved pipe 243 and enter the vertical corrugated pipe 242. The airflow generated by the fan 248 is mixed with the seeds and enters the seed divider 241 together. In the seed divider 241, the seeds are evenly distributed, and then fall into the pre-opened sowing furrow through the seed dispensing pipe (not shown in the figure), that is, the seed dispensing pipe is connected to the seed dispensing port 241-5. Next, the covering mechanism will cover and press the seeds to ensure that the seeds are in close contact with the soil, which is conducive to the germination and growth of the seeds.

[0045] join Figure 1-Figure 3 The fan is installed on the main frame 1 through the installation box 249.

[0046] join Figure 1-Figure 3 The rice seeds fall down in sequence through the central seed metering device 2410, and then the fan 248 provides a stable airflow to transfer the rice seeds to the vertical corrugated pipe 242, and the vertical corrugated pipe 242 further fully integrates the rice seeds. Finally, the equidistant arc structure of the seed divider 241 evenly arranges them to the seed dividing port 241-5, and evenly divides the air-seed mixed flow.

[0047] See also Figure 1 and Figure 6 The lifting mechanism includes four connecting rods arranged in parallel with each other and an electric push-pull rod 7; one end of the connecting rod is hinged to the main frame 1, and the other end is hinged to the trenching and covering frame 811; one end of the electric push-pull rod 7 is hinged to the main frame 1, and the other end is hinged to the trenching and covering frame 811. By setting the telescopic movement of the electric push-pull rod 7, the lifting and lowering of the trenching and covering device 8 is realized.

[0048] See also Figure 1 and Figure 6 The connecting rod is hinged to the trenching and covering frame 811 through a lifting ear 812.

[0049] See also Figure 1 and Figure 6 The main body frame 1 is provided with a main body support frame 6, and the electric push-pull rod 7 is hinged to the main body support frame 6.

[0050] See also Figure 1 and Figure 6-Figure 7The trenching and covering modules are provided with multiple groups, and each group of trenching and covering modules also includes a vertical support plate 81, a transverse support plate 82 and a shock absorber 89. The vertical support plate 81 is installed on the trenching and covering frame 811, and one end of the transverse support plate 82 is connected to the lower end of the vertical support plate 81, and the other end is connected to the covering mechanism; the trencher 83 is arranged on the transverse support plate 82, and the shock absorber 89 is hinged between the vertical support plate 81 and the trencher 83. The number of furrowing and covering modules can be adjusted according to the width of the plot to achieve the desired number of furrows to be opened. The furrowing and covering modules of this embodiment are 6 groups. The vertical support plate 81 and the furrowing and covering frame 811 are connected by U-shaped bolts, the vertical support plate 81 and the horizontal support plate 82 are connected by bolts, the shock absorber 89 and the vertical support plate 81 are connected by a lifting ear 810, and the lifting ear 810 and the vertical support plate 81 are connected by bolts. The upper end of the furrow opener 83 is provided with a shock absorber connecting plate 88, and the shock absorber connecting plate 88 is connected to the furrow opener 83 by bolts. One end of the shock absorber 89 is connected to the shock absorber connecting plate 88, and the other end is connected to the lifting ear 810, so as to achieve the effect of mutual fixation.

[0051] See also Figure 1 and Figure 6-Figure 7 The soil covering mechanism includes a fixed outer tube 86 fixed on the transverse support plate 82, a height adjustment member 85 sleeved in the fixed outer tube 86, an adjustment hand wheel 87 arranged at the upper end of the height adjustment member 85, and a soil covering wheel 84 arranged at the lower end of the height adjustment member 85. The height of the soil covering wheel 84 can also be adjusted by adjusting the hand wheel 87, which is highly flexible and can adjust the soil covering height.

[0052] See also Figure 1-Figure 2 The seeding drive mechanism includes a seeding drive motor 23 and a transmission rod 26; the seed box 21 is connected to the main frame 1 through two side plates 22 and 27, the transmission rod 26 is rotatably arranged between the two side plates 22 and 27, the middle part of the transmission rod 26 is connected to the central seeding device 2410, and the drive motor is installed on one of the side plates 22 or 27 to drive the transmission rod 26 to rotate. In the above structure, the transmission rod 26 is connected to the side plates 22 and 27 through the bearing 25, and the seeding drive motor 23 drives the transmission rod 26 to rotate, driving the seeding wheel of the central seeding device 2410 to rotate, thereby realizing the seeding function.

[0053] See also Figure 2 The upper end of the seed box 21 is provided with an opening to facilitate adding seeds into the seed box 21.

[0054] See also Figure 1The walking device includes a wheel 5 arranged at the lower end of the main frame 1 and a supporting suspension mechanism 4 arranged between the main frame 1 and the wheel 5. In the above structure, the walking of the air-blown concentrated row type live broadcast machine can be realized.

[0055] See also Figure 3 A support assembly for supporting the conveying pipe is provided between the main frame 1 and the conveying pipe, and the support assembly includes an upper support frame 246 and a lower support frame 245. The lower support frame 245 is connected to the main frame 1, and the upper support frame 246 is connected to the conveying pipe. The upper support frame 246 and the lower support frame 245 are adjustable. By adjusting the position between the upper support frame 246 and the lower support frame 245, the height of the conveying pipe can be adjusted, thereby improving the installation flexibility of the conveying pipe.

[0056] join Figure 1-Figure 2 The air-blown collective seeding machine also includes a power device, which provides the power required for the operation of the direct seeding machine. The power device includes a power mechanism for driving the wheel 5 to rotate, a seeding drive mechanism, an electric push-pull rod 7, a fan 248 and other structures.

[0057] See also Figure 1 A motor control box 3 is also provided on the main frame 1.

[0058] See also Figure 1-Figure 6 The working principle of the above-mentioned air-blown centralized direct seeding machine is:

[0059] During operation, the height of the furrowing and covering device 8 is adjusted by the lifting mechanism so that the furrowing and covering device 8 can perform the furrowing and covering operation at a suitable height; the walking device drives the air-blowing collective direct seeding machine to move in the field. During movement, the furrow opener 83 will open several sowing furrows on the ground, and the fan 248 shaft in the fan 248 drives the impeller to generate an airflow with a certain pressure, and the airflow is blown from the conveying pipe to the seed divider 241; at the same time, the seeding drive mechanism drives the seeding wheel on the central seeding device 2410 to move, and the seeds in the seed box 21 will be discharged into the conveying pipe through the seeding wheel. Under the action of the airflow, the seeds enter the seed divider 241. In the conveying pipe, the seeds are mixed with the flowing air to form an air-seed mixed flow. After the seeds are mixed with the flowing air, they enter the seed divider 241. In the seed divider 241, the air-seed mixed flow is then introduced into the sowing furrow through the seeding pipe, and then the soil is covered in the sowing furrow by the covering mechanism to perform the soil covering operation to complete the entire sowing process. After sowing is completed, the lifting mechanism adjusts the height of the furrowing and soil-covering device 8, lifts the furrowing and soil-covering device 8, and separates it from the ground, making it convenient for the air-blowing and row-collecting direct seeding machine to move.

[0060] See also Figure 8 The seeding wheel is provided with a plurality of seeding blades in the circumferential direction, and spiral seeding grooves are formed between the seeding blades. By providing the spiral seeding grooves, precise seeding is achieved.

[0061] The above is a preferred embodiment of the present invention, but the embodiment of the present invention is not limited to the above content. Any other changes, modifications, substitutions, combinations, and simplifications made without departing from the spirit and principles of the present invention should be equivalent replacement methods and are included in the protection scope of the present invention.

Claims

1. An air-blown centralized direct seeding machine, characterized in that: It includes a main frame, a walking device, a seed separation device and a trenching and soil covering device arranged on the main frame; the trenching and soil covering device is connected to the main frame through a lifting mechanism; the lifting mechanism is used to adjust the height of the trenching and soil covering device; wherein, The seeding device comprises a seed box for storing seeds arranged on the main frame and a seeding mechanism for discharging the seeds in the seed box into the sowing furrow; the seeding mechanism comprises a fan, a central seeding device, a seeding driving mechanism, a conveying pipe and a seeding device; one end of the conveying pipe is connected to the fan, and the other end of the conveying pipe is connected to the seeding device; the upper end of the central seeding device is connected to the lower end of the seed box, and the lower end of the central seeding device is connected to the conveying pipe; the seeding driving mechanism is used to drive the central seeding device to perform seeding; The trenching and soil covering device comprises a trenching and soil covering frame and a trenching and soil covering module. The trenching and soil covering module comprises a trencher arranged on the trenching and soil covering frame for trenching a sowing trench and a soil covering mechanism for covering the soil in the sowing trench.

2. The air-blown direct seeding machine according to claim 1, characterized in that: The seed divider is an equidistant arc structure, comprising an umbrella-shaped shell, a seed dividing chamber arranged in the umbrella-shaped shell, and an inlet pipe arranged in the middle of the umbrella-shaped shell, the seed dividing chamber comprising an umbrella-shaped arc chamber located at the upper end and an annular chamber located at the lower end, the lower end of the umbrella-shaped shell is provided with a plurality of seed dividing ports distributed in a circle around its axis, the axis of the inlet pipe coincides with the axis of the umbrella-shaped shell, and the seed dividing port is connected with the annular chamber; the upper end of the inlet pipe is connected with the umbrella-shaped arc chamber, and the lower end is connected with the conveying pipe.

3. The air-blown direct seeding machine according to claim 2, characterized in that: The bottom of the annular cavity is provided with a conical guide opening at a position corresponding to the seeding opening, and the top of the umbrella-shaped arc cavity is provided with a conical protrusion protruding downward, and the position of the conical protrusion corresponds to the position of the entry pipe.

4. The air-blown direct seeding machine according to claim 2 or 3, characterized in that: The conveying pipe includes a horizontal pipe, a curved pipe and a vertical corrugated pipe; the fan, horizontal pipe, curved pipe, vertical corrugated pipe and inlet pipe are connected in sequence; the horizontal pipe is connected to the central seed metering device through a three-way pipe, and the vertical corrugated pipe is connected to the inlet pipe.

5. The air-blown direct seeding machine according to claim 1, characterized in that: The lifting mechanism includes four connecting rods arranged in parallel with each other and an electric push-pull rod; one end of the connecting rod is hinged to the main frame, and the other end is hinged to the trenching and covering frame; one end of the electric push-pull rod is hinged to the main frame, and the other end is hinged to the trenching and covering frame.

6. The air-blown direct seeding machine according to claim 1, characterized in that: The trenching and covering modules are provided with multiple groups, and each group of trenching and covering modules also includes a vertical support plate, a transverse support plate and a shock absorber. The vertical support plate is installed on the trenching and covering frame, one end of the transverse support plate is connected to the lower end of the vertical support plate, and the other end is connected to the covering mechanism; the trench opener is arranged on the transverse support plate, and the shock absorber is hinged between the vertical support plate and the trench opener.

7. The air-blown direct seeding machine according to claim 6, characterized in that: The soil covering mechanism comprises a fixed outer tube fixed on the transverse support plate, a height adjusting member sleeved in the fixed outer tube, an adjusting hand wheel arranged at the upper end of the height adjusting member and a soil covering wheel arranged at the lower end of the height adjusting member.

8. The air-blown direct seeding machine according to claim 1, characterized in that: The seeding drive mechanism includes a seeding drive motor and a transmission rod; the seed box is connected to the main frame via two side plates, the transmission rod is rotatably arranged between the two side plates, the middle part of the transmission rod is connected to the central seeding device, and the drive motor is installed on one of the side plates to drive the transmission rod to rotate.

9. The air-blown direct seeding machine according to claim 1, characterized in that: The traveling device comprises a wheel arranged at the lower end of the main body frame and a supporting suspension mechanism arranged between the main body frame and the wheel.

10. The air-blown direct seeding machine according to claim 1, characterized in that: A support assembly for supporting the conveying pipe is provided between the main frame and the conveying pipe, and the support assembly includes an upper support frame and a lower support frame, the lower support frame is connected to the main frame, and the upper support frame is connected to the conveying pipe, and the upper support frame and the lower support frame are adjustably connected.

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