An adjustable seeding rate control assembly and modular rate control seeding device

Abstract

The application discloses an adjustable seeding and quantity-controlling assembly and a modular quantity-controlling seeding device, and relates to the technical field of seeding equipment. The adjustable seeding and quantity-controlling assembly comprises a shell and a material conveying and transferring wheel rotatably arranged on the shell. The shell is provided with a feeding port and a discharging port. The material conveying and transferring wheel is circumferentially provided with at least one material conveying groove which is radially distributed. A piston is arranged in the material conveying groove. The material conveying and transferring wheel is provided with an adjusting cavity. The adjusting cavity is communicated with the material conveying groove. An adjusting component is further arranged in the adjusting cavity. The adjusting component is used for moving the piston in each material conveying groove along the radial direction to form material conveying grooves with different groove depths. The seeding and quantity-controlling assembly can change the groove depth of the material conveying groove by arranging the piston in the material conveying groove of the material conveying and transferring wheel and moving the piston along the radial direction by the adjusting component in the adjusting cavity. The amount of seeds contained can be adjusted, the seeding amount can be controlled, the application range is improved, and the application is more convenient and practical.

Description

Technical Field

[0001] This invention belongs to the field of seeding equipment technology, specifically relating to an adjustable seeding quantity control component and a modular seeding quantity control device. Background Technology

[0002] Seeders are used in agricultural planting to carry out sowing operations. In order to improve the efficiency of agricultural planting, the application of seeders is becoming more and more widespread. However, there are still many shortcomings in the current agricultural seeders during use.

[0003] In existing technologies, most seeding equipment uses a rotating receiving disc with circumferentially oriented troughs to control the amount of material received, ensuring a consistent seeding rate and facilitating even spacing. However, this receiving structure provides a fixed amount of material that cannot be adjusted, making the seeding quantity uncontrollable and impractical. Furthermore, most seeding equipment is of a single-piece or non-modular design, making assembly, disassembly, and maintenance difficult, and requiring numerous drive motors for complex control. Additionally, existing seeding equipment lacks a soil-shoveling function, or if it does, it cannot adjust the seeding depth according to the height of the raised beds. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide an adjustable seeding control component and a modular seeding control device to solve the problem that the existing seeding control mechanism cannot adjust the seeding amount.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0006] On the one hand, an adjustable seeding control component is provided, including a housing and a material conveying wheel rotatably disposed on the housing. The housing has a feed inlet and a discharge outlet. The material conveying wheel has at least one radially distributed material conveying trough along the circumference. A piston is disposed in the material conveying trough. The material conveying wheel has an adjustment chamber that communicates with the material conveying trough. An adjustment component is also provided in the adjustment chamber for moving the piston in each material conveying trough radially to form material conveying troughs of different depths.

[0007] Furthermore, the piston extends at least partially into the adjustment chamber;

[0008] The adjusting component includes an adjusting member that slides within the adjusting cavity to move axially along the adjusting cavity. The adjusting member has a mating end and a movable adjusting end. The outer peripheral surface of the mating end is a tapered surface and abuts against the piston. The movable adjusting end extends out of the adjusting cavity and is connected to a driving component.

[0009] Furthermore, the driving component is a rotary handle or an electrically driven component;

[0010] The adjusting component has an axial hole and a limiting rod that can be moved relative to it through the hole. The limiting rod passes through the hole and is fixedly connected to the conveying wheel. The adjusting component is connected to the handle or an electric drive component.

[0011] Furthermore, the driving component is a rotary handle, the limiting rod is threadedly connected to the rotary handle, and the limiting rod is movably engaged with the adjusting component;

[0012] A spring is provided between the mating end of the adjusting component and the adjusting cavity, and the spring is sleeved on the outside of the limiting rod.

[0013] On the other hand, a modular controlled-quantity seeding device is also provided, including a frame, a loading assembly, and an adjustable seeding quantity control assembly as described in any of the above technical solutions, mounted on the frame.

[0014] The loading assembly includes a loading barrel that communicates with the inlet of the housing, and an agitator is rotatably disposed inside the loading barrel. The agitator is connected to a second transmission unit that drives it to rotate.

[0015] The discharge port of the shell is connected to a downwardly extending discharge pipe.

[0016] Furthermore, the modular controlled-volume seeding device also includes a soil-shoveling assembly, which includes a movable seat movably sleeved on the outside of the discharge pipe. The movable seat has a discharge port through which the discharge pipe passes, and the bottom end of the movable seat has a shovel claw component that can open and close to shovel soil. The opening and closing of the shovel claw component is controlled by a limiting guide component.

[0017] Furthermore, the movable seat is connected to the discharge port by a discharge pipe; the shovel claw component includes a fixed shovel claw connected to the discharge pipe and a movable shovel claw hinged to the fixed shovel claw or the discharge pipe.

[0018] The limiting and guiding component includes at least one guide frame connected to the frame. The guide frame has a guide portion near the movable shovel claw, and the guide portion is provided with an inclined guide slide. The movable shovel claw is connected to a first connecting rod, and the end of the first connecting rod opposite to the movable shovel claw is movably connected to the guide slide.

[0019] Furthermore, the modular controlled-volume seeding device also includes a main drive mechanism disposed on the frame. The main drive mechanism has a first transmission part, a second transmission part, and a third transmission part. The main drive mechanism is driven by a crank-rocker mechanism through the first transmission part. The crank-rocker mechanism is connected to the movable seat to drive the movable seat to move up and down. The main drive mechanism is connected to the stirring component through the second transmission part, and the main drive mechanism is driven by a rotary transmission component through the third transmission part. The rotary transmission component is driven by the material conveying wheel.

[0020] Furthermore, the rotary transmission assembly includes a Maltese wheel intermittent motion mechanism, which connects the third transmission unit to the material conveying wheel.

[0021] Furthermore, the frame includes an inner frame and an outer frame. The outer frame is equipped with a scissor telescopic mechanism to enable lifting and lowering. The inner frame is located inside the outer frame, and the top of the inner frame is fixedly connected to the top of the outer frame.

[0022] The technological advancements achieved by this invention due to the adoption of the above technical solutions are as follows:

[0023] (1) The adjustable seeding control component of the present invention, by setting a piston in the material conveying trough of the material conveying wheel, can make the piston move radially through the adjustment component in the adjustment chamber, thereby changing the depth of the material conveying trough, thereby adjusting the amount of seeds that can be contained, making the seeding amount adjustable and controllable, and also improving the scope of application, making it more convenient and practical.

[0024] (2) The adjusting component can abut against the piston through the conical surface, so that when the adjusting component moves, the piston can move in the conveying trough to change the trough depth. The adjusting component can be manually adjusted by the handle to drive it to move, thereby pressing against the piston to change the trough depth, making the adjustment more convenient.

[0025] (3) By setting a spring between the adjusting component and the adjusting cavity, the adjusting component can move elastically within a certain range, thereby playing a certain elastic buffering role, making the receiving and rotation more reliable and stable;

[0026] (4) The modular controlled seeding device of the present invention is modularly designed, which makes it easy to assemble, disassemble or repair, and integrates functions such as loading, shoveling, and height adjustment, which can meet the needs of the entire seeding process and is more practical. Attached Figure Description

[0027] Figure 1 This is a perspective view of an adjustable seeding control component of the present invention from a first-view perspective.

[0028] Figure 2 This is a perspective view of an adjustable seeding control component of the present invention from a second perspective.

[0029] Figure 3 This is a cross-sectional view of an adjustable seeding control component according to the present invention.

[0030] Figure 4 This is a first-view perspective perspective of a modular controlled-volume seeding device of the present invention.

[0031] Figure 5 This is a perspective view of a modular controlled seeding device of the present invention from a second-view perspective.

[0032] Figure 6 This is a perspective view of the loading assembly of a modular controlled-volume seeding device according to the present invention.

[0033] Figure 7 This is a perspective view of the soil-shoveling component of a modular controlled-volume seeding device according to the present invention.

[0034] Figure 8 This is a schematic diagram showing the connection between the soil-shoveling component and the first transmission unit of a modular controlled-volume seeding device according to the present invention.

[0035] Figure 9 This is a perspective view of the main drive mechanism of a modular controlled seeding device according to the present invention.

[0036] Figure 10 This is a perspective view of the intermittent motion mechanism of the Maltese wheel in a modular controlled seeding device according to the present invention.

[0037] Figure 11 This is a schematic diagram of the frame structure of a modular controlled-volume seeding device according to the present invention.

[0038] In the diagram: 1-Frame; 11-Outer frame; 12-Inner frame; 13-Lockable gas spring rod; 2-Seedling control component; 21-Shell; 22-Inlet; 23-Outlet; 24-Handle; 25-Transport wheel; 26-Transport trough; 27-Piston; 28-Adjusting chamber; 29-Adjusting component; 210-Matching end; 211-Limit rod; 212-Bearing; 3-Loading component; 31-Loading bucket; 32-Agitating component; 4-Shovel. Components; 41-Moving seat; 42-Shovel claw component; 421-Fixed shovel claw; 422-Moving shovel claw; 43-Limiting guide component; 431-Guide frame; 432-Guide slide; 433-First connecting rod; 44-Discharge pipe; 45-Discharge pipe; 46-Crank rocker mechanism; 5-Main drive mechanism; 51-Reduction motor; 52-First toothed pulley; 53-Second toothed pulley; 54-Transmission disc; 55-Malta wheel intermittent motion mechanism. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0040] The present invention will be further described in detail below with reference to embodiments:

[0041] Please refer to Figure 1-3As shown, an embodiment of the present invention provides an adjustable seeding control component 2, including a housing 21 and a material conveying wheel 25 rotatably disposed within the housing 21. The housing 21 has a feed inlet 22 and a discharge outlet 23. The material conveying wheel 25 is provided with at least one radially distributed material conveying groove 26 along the circumference. A piston 27 is provided in the material conveying groove 26, and the material conveying wheel 25 has an adjustment cavity 28 communicating with the material conveying groove 26. An adjustment component is also provided in the adjustment cavity 28 for moving the piston 27 in each material conveying groove 26 radially to form material conveying grooves 26 with different depths.

[0042] Correspondingly, the material conveying trough 26 has a receiving station and a feeding station. When the material conveying wheel 25 is in the receiving station, one of the material conveying troughs 26 of the material conveying wheel 25 is connected to the inlet 22 to receive material. When the material conveying wheel 25 is in the feeding station, the material conveying trough 26 after receiving material is connected to the outlet 23 to discharge material.

[0043] Through the above technical solution, a piston 27 is set in the material conveying trough 26 of the material conveying wheel 25. The piston 27 can be moved radially by the adjusting component in the adjusting cavity 28, thereby changing the depth of the material conveying trough 26. This allows for adjustment of the amount of seeds that can be contained, making the sowing amount adjustable and controllable, and also improving the applicability, making it more convenient and practical.

[0044] In one embodiment, the piston 27 extends at least partially into the adjustment cavity 28; the adjustment component includes an adjustment member 29 that slides within the adjustment cavity 28 and moves axially along the adjustment cavity 28, the adjustment member 29 having a mating end 210 and a movable adjustment end, the outer peripheral surface of the mating end 210 being a tapered surface and abutting against the piston 27, and the movable adjustment end extending out of the adjustment cavity 28 and connected to a drive component.

[0045] In this way, the adjusting member 29 of the adjusting component can abut against the piston 27 through the conical surface. When the adjusting member 29 moves, the piston 27 can move in the conveying trough 26 to change the trough depth. Furthermore, the driving component connected to the moving adjusting end can be easily moved and adjusted, making the adjustment more convenient.

[0046] In some embodiments of the drive component, the drive component can be a handle 24 or an electric drive component such as a linear motor; the adjusting member 29 has an axial hole and a limiting rod 211 is sleeved through the hole, which is movable relative to the adjusting member 29. The limiting rod 211 passes through the hole and is fixedly connected to the conveying wheel 25. The adjusting member 29 is in contact with the handle 24, or the adjusting member 29 is connected to the electric drive component. In this way, the handle 24 can move axially on the limiting rod 211 through a threaded connection, and the axial movement of the handle 24 drives the adjusting member 29 to move. The gap between one end of the conical bottom surface of the adjusting member 29 and the adjusting cavity 28 is limited by a spring. The electric drive component can also achieve movement adjustment by pushing the adjusting member 29 to move.

[0047] The driving component is a handle 24, and a limiting rod 211 is threadedly connected to the handle 24. The pin end of the limiting rod 211 is connected to the intermittent motion mechanism 55 of the Maltese wheel, and the limiting rod 211 is movably engaged with the adjusting member 29. A spring (not shown in the figure) is provided between the mating end 210 of the adjusting member 29 and the adjusting cavity 28, and the spring is sleeved on the outside of the limiting rod 211. By providing a spring between the adjusting member 29 and the adjusting cavity 28, the adjusting member 29 can move elastically within a certain range, thereby playing a certain elastic buffering role, making the receiving and rotation more reliable and stable.

[0048] In practice, the adjustable seeding control component 2 can be installed on different seeding equipment, and other additional functions or components can be selected and configured according to actual needs without any restrictions.

[0049] Of course, the material conveying wheel 25 is electrically driven and can perform continuous seeding operations through continuous rotation.

[0050] In order to achieve the rotational engagement between the material conveying wheel 25 and the housing 21, the outer front end and the outer rear end of the material conveying wheel 25 are provided with a reduced diameter mounting part, and bearings 212 are respectively installed in the mounting part. The bearings 212 enable the material conveying wheel 25 to rotate in coordination with the housing 21.

[0051] The upper part of the trough wall of the material conveying trough 26 is also provided with two limiting protrusions to prevent the piston 27 from coming out of the material conveying trough 26 in different positions.

[0052] Please refer to Figure 4-11As shown, this embodiment of the invention also provides a modular controlled-quantity seeding device, including a frame 1, a loading assembly 3, and an adjustable seeding control assembly 2 disposed on the frame 1; the loading assembly 3 includes a loading barrel 31 communicating with the inlet 22 of the housing 21, an agitator 32 rotatably disposed inside the loading barrel 31, and the agitator 32 is connected to a second transmission part that drives it to rotate; the outlet 23 of the housing 21 is connected to a downwardly extending outlet pipe 44.

[0053] The frame 1 serves as a carrier and can be mounted on a mobile device such as a mobile trolley, allowing for sowing operations through the movement of the mobile device. The sowing control assembly 2 is mounted on the frame 1, and its loading assembly 3 can load seeds and / or fertilizer into the loading hopper 31 for continuous material sowing. An agitator 32 installed in the loading hopper 31 mixes the seeds and fertilizer, ensuring a relatively even distribution of seeds and fertilizer in the material entering the conveying trough 26, thus improving sowing reliability. The agitator 32 can be an impeller structure with multiple blades; its rotation agitates the fertilizer and seeds, and it can rotate automatically under the drive of the second transmission unit, making it more convenient.

[0054] In order to shovel soil simultaneously with sowing, the modular controlled-volume sowing device also includes a soil-shoveling assembly 4. The soil-shoveling assembly 4 includes a movable seat 41 movably sleeved on the outside of the discharge pipe 44. Limiting grooves are opened on both sides of the movable seat 41, and a limiting block is slidably installed in each limiting groove. The limiting block is fixedly installed on the frame 1. The movable seat 41 is provided with a discharge port through which the discharge pipe 44 passes, and the bottom end of the movable seat 41 is provided with a shovel claw component 42 that can open and close to shovel soil. The movable seat 41 is also connected to a first transmission unit that can drive the movable seat 41 to move up and down through a crank rocker mechanism 46. The soil-shoveling assembly 4 also includes a limiting guide component 43 for driving the shovel claw component 42 to open and close.

[0055] In this way, driven by the first transmission unit, the moving seat 41 can move up and down. When moving downward, it can be inserted into the soil through the closed shovel claw component 42. When the moving seat 41 moves upward, the shovel claw component 42 can open. At this time, the discharge port discharges seeds and fertilizer into the soil pit formed by shoveling, thereby realizing sowing while shoveling.

[0056] The movable seat 41 is connected to the discharge port by a discharge pipe 45; the shovel claw component 42 includes a fixed shovel claw 421 connected to the discharge pipe 45 and a movable shovel claw 422 hinged to the fixed shovel claw 421 or the discharge pipe 45; the limiting guide component 43 includes at least one guide frame 431 connected to the frame 1, the guide frame 431 has a guide portion near the movable shovel claw 422, and the guide portion is provided with an inclined guide slide 432; the movable shovel claw 422 is connected to a first connecting rod 433, and one end of the first connecting rod 433 away from the movable shovel claw 422 is movably connected to the guide slide 432.

[0057] The first transmission unit enables the movable seat 41 to move up and down via the crank-rocker mechanism 46. Simultaneously, the movable jaw 422 of the jaw component 42, guided and slidably engaged by the guide frame 431 and the first connecting rod 433, can open or close relative to the fixed jaw 421, thereby achieving soil shoveling. In practical implementation, the guide frame 431 can be designed as a guide slide 432 with different guide paths, thus enabling different opening and closing actions or processes, facilitating customization according to user needs and making it more practical and convenient.

[0058] The modular controlled-volume seeding device also includes a main drive mechanism 5 located on the frame 1. The main drive mechanism 5 has a first transmission part, a second transmission part, and a third transmission part. The main drive mechanism 5 is connected to the crank-rocker mechanism 46 through the first transmission part. The crank part of the crank-rocker mechanism 46 is formed by two separate flywheel shafts with holes, left and right, connected by bolts and nuts. The gap between the bolted connection of the two flywheel shafts is filled with a bearing. The inner ring of the bearing is fitted on the bolt, and the outer ring of the bearing is nested inside one end of the connecting rod. The hole at the other end of the connecting rod is also equipped with a bearing. The inner ring of the bearing is connected to the movable seat 41. When the crank part rotates, it will drive the connecting rod to push the movable seat 41 to move. Since the movable seat 41 has a discharge pipe 44 inserted, the movable seat 41 will reciprocate up and down. The main drive mechanism 5 is connected to the stirring component 32 through the second transmission part, and the main drive mechanism 5 is connected to the rotary transmission component through the third transmission part.

[0059] The main drive mechanism 5 serves as a common drive source, which can be a power source composed of a geared motor 51. Synchronous transmission can be achieved by setting multiple transmission parts at its output end. For example, a first toothed pulley 52, a second toothed pulley 53, and a transmission disk 54 can be set sequentially at its output end. These three can respectively constitute the first transmission part, the second transmission part, and the third transmission part. In this way, the second toothed pulley 53 can be connected to the stirring component 32 through the toothed belt and the corresponding toothed pulley, so that the stirring component 32 can rotate. The first toothed pulley 52 can drive the crank of the crank rocker mechanism 46 to rotate through another toothed belt and another toothed pulley, so that the rocker can swing and drive the moving seat 41 to move up and down. At the same time, the transmission disk 54 is connected to the rotary transmission component, so that the material conveying wheel 25 can rotate. This enables the synchronous operation of each mechanism under the drive of a single motor, greatly reducing the number of motors required.

[0060] The rotary transmission assembly includes a Maltese wheel intermittent motion mechanism 55, which drives the transmission disc 54 in the third transmission unit to the material conveying wheel 25. Through the intermittent transmission of the Maltese wheel intermittent motion mechanism 55, the material conveying wheel 25 can also rotate intermittently. However, when the material conveying wheel 25 is not rotating, the moving seat (41) is still in motion because it is driven by the main drive mechanism 5. For example, the shovel claw component 42, which has been inserted into the soil, moves upward and opens, so that the seeds and fertilizers entering the discharge pipe 45 fall into the soil pit formed by shoveling, thus realizing the sowing action. Similarly, when the receiving trough of the material conveying wheel 25 is about to rotate 90° and switch to the feeding position, the shovel claw component 42 closes and inserts into the soil, thus realizing the shoveling action. The two actions constitute a sowing process.

[0061] In an embodiment of the present invention, the frame 1 includes an inner frame 12 and an outer frame 11. The outer frame 11 is equipped with a scissor telescopic mechanism to enable lifting and lowering. The inner frame 12 is located inside the outer frame 11, and the top of the inner frame 12 is fixedly connected to the top of the outer frame 11.

[0062] The outer frame 11 is mainly used to support the whole structure. The inner frame 12 is connected to the outer frame 11 and installs related mechanisms or components. The outer frame 11 is configured as a frame with a scissor telescopic structure, which can be raised and lowered by a hydraulic cylinder or a lockable air spring rod 13 to adjust the sowing height, making it more convenient. Preferably, the lockable air spring rod 13 can be used as the drive for raising and lowering, which facilitates manual operation.

[0063] In summary, the modular controlled-quantity seeding device of this invention is modularly designed, which facilitates assembly, disassembly or maintenance, and integrates functions such as material loading, soil shoveling, and height adjustment, thus meeting the needs of the entire seeding process and making it more practical.

[0064] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A modular controlled-quantity seeding device, characterized in that: Includes a frame (1), a loading assembly (3), and an adjustable seeding control assembly mounted on the frame (1); The adjustable seeding control assembly includes a housing (21) and a material conveying wheel (25) rotatably disposed within the housing (21). The housing (21) has an inlet (22) and an outlet (23). The material conveying wheel (25) is provided with at least one radially distributed material conveying trough (26) along the circumference. A piston (27) is provided in the material conveying trough (26), and the material conveying wheel (25) has an adjustment chamber (28). The adjustment chamber (28) is connected to the material conveying trough (26). An adjustment component is also provided in the adjustment chamber (28) for moving the piston (27) in each material conveying trough (26) radially to form material conveying troughs (26) with different depths. The loading assembly (3) includes a loading barrel (31) communicating with the inlet (22) of the housing (21). An agitator (32) is rotatably arranged inside the loading barrel (31), and the agitator (32) is connected to a second transmission unit that drives it to rotate. The discharge port (23) of the housing (21) is connected to a downwardly extending discharge pipe (44). The modular controlled seeding device also includes a soil-shoveling assembly (4), which includes a movable seat (41) movably sleeved on the outside of the discharge pipe (44). The movable seat (41) is provided with a discharge port through which the discharge pipe (44) passes, and the bottom end of the movable seat (41) is provided with a shovel claw component (42) that can open and close to shovel soil. The shovel claw component (42) is controlled to open and close by a limiting guide component (43). The movable seat (41) is connected to the discharge port by a discharge pipe (45); the shovel claw component (42) includes a fixed shovel claw (421) connected to the discharge pipe (45) and a movable shovel claw (422) hinged to the fixed shovel claw (421) or the discharge pipe (45). The limiting guide component (43) includes at least one guide frame (431) connected to the frame (1). The guide frame (431) has a guide portion near the movable shovel claw (422), and the guide portion is provided with an inclined guide slide (432). The movable shovel claw (422) is connected to a first connecting rod (433), and one end of the first connecting rod (433) away from the movable shovel claw (422) is movably connected to the guide slide (432). The modular controlled seeding device also includes a main drive mechanism (5) located on the frame (1). The main drive mechanism (5) has a first transmission part, a second transmission part and a third transmission part. The main drive mechanism (5) is connected to a crank rocker mechanism (46) through the first transmission part. The crank rocker mechanism (46) is connected to the moving seat (41) to drive the moving seat (41) to move up and down. The main drive mechanism (5) is connected to the stirring component (32) through the second transmission part. The main drive mechanism (5) is connected to a rotary transmission component through the third transmission part. The rotary transmission component is connected to the material conveying wheel (25).

2. The modular controlled-quantity seeding device according to claim 1, characterized in that: The piston (27) extends at least partially into the regulating cavity (28); The adjustment component includes an adjustment member (29) that slides within the adjustment cavity (28) and moves axially along the adjustment cavity (28). The adjustment member (29) has a mating end (210) and a movable adjustment end. The outer peripheral surface of the mating end (210) is a tapered surface and abuts against the piston (27). The movable adjustment end extends out of the adjustment cavity (28) and is connected to a driving component.

3. The modular controlled-quantity seeding device according to claim 2, characterized in that: The driving component is a handle (24) or an electric driving component; The adjusting component (29) has an axial hole and a limiting rod (211) is sleeved through the axial hole and can move relative to it. The limiting rod (211) passes through the axial hole and is fixedly connected to the conveying wheel (25). The adjusting component (29) is connected to the handle (24) or the electric drive component.

4. The modular controlled-quantity seeding device according to claim 3, characterized in that: The driving component is a handle (24), the limiting rod (211) is threadedly connected to the handle (24), and the limiting rod (211) is movably engaged with the adjusting component (29); A spring is provided between the mating end (210) of the adjusting member (29) and the adjusting cavity (28), and the spring is sleeved on the outside of the limiting rod (211).

5. The modular controlled-quantity seeding device according to claim 1, characterized in that: The rotary transmission assembly includes a Maltese wheel intermittent motion mechanism (55), which drives the third transmission unit to the material conveying wheel (25).

6. The modular controlled-quantity seeding device according to claim 1, characterized in that: The frame (1) includes an inner frame (12) and an outer frame (11). The outer frame (11) is equipped with a scissor telescopic mechanism to be able to lift and lower. The inner frame (12) is located inside the outer frame (11), and the top of the inner frame (12) is fixedly connected to the top of the outer frame (11).

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