Seed sowing device

Abstract

The utility model relates to the technical field of seeding machines, in particular to a seed-metering device. Comprising a machine shell, a seed guide pipe is fixedly installed on one side of the machine shell, a sowing opening is formed in the bottom of the machine shell, an installation cover is rotationally installed in the machine shell, and a finger clamping type seed taking mechanism is installed on the installation cover; the end, away from the installation cover, of the rotating shaft is in transmission connection with a power input shaft, and a clutch mechanism capable of cutting off or enabling transmission of the rotating shaft and the power input shaft is installed between the rotating shaft and the power input shaft. By means of the structure, when the seeder does not need seeding for a short time, transmission between the rotating shaft and the power input shaft can be controlled to be disconnected through the clutch mechanism, so that the seed metering device stops working under the condition that the transmission wheel does not need to be lifted, and waste caused by continuous seeding of seeds is avoided.

Description

Technical Field

[0001] This utility model relates to the field of seeder technology, specifically to a seed metering device. Background Technology

[0002] Seed metering devices are crucial components of seeders, and their performance directly impacts the sowing results. Finger-type seed metering devices are a commonly used type, widely applied in corn and soybean seeders. They achieve high-precision, high-efficiency sowing by mimicking the way a human hand grasps seeds.

[0003] In existing technologies, the driving force of the seed metering device is often derived from the transmission between the seeder's ground wheel and the drive wheel. The seed metering device's shaft is directly connected to the drive wheel via a sprocket and chain drive. Whether the seed metering device is working can only be adjusted via the drive wheel; when sowing is needed, the drive wheel is lowered, and when sowing is not needed, it is raised. However, in farmland, when the seeder turns to change planting positions, sowing is often not required. Raising the drive wheel at this time would waste time, while not raising it would lead to continuous sowing and seed waste, making it inconvenient to use. Utility Model Content

[0004] To address the aforementioned problems, this utility model provides a seed metering device to solve the problem that the operation of the seed metering device in the prior art is controlled by a transmission wheel and cannot be adjusted independently, making it inconvenient to use.

[0005] This utility model is achieved using the following technical solution: a seed metering device, including a housing, a seed guide tube fixedly installed on one side of the housing, a seeding port provided at the bottom of the housing, an installation cover rotatably installed inside the housing, and a finger-clamp seed-taking mechanism installed on the installation cover; a rotating shaft fixedly installed in the middle of the installation cover, a power input shaft being drivenly connected to the end of the rotating shaft away from the installation cover, and a clutch mechanism capable of disconnecting or enabling transmission between the rotating shaft and the power input shaft.

[0006] With the above structure, when the seeder does not need to sow for a short period of time, such as when turning, the transmission between the rotating shaft and the power input shaft can be disconnected through the clutch mechanism. This allows the seed metering device to stop working without needing to lift the transmission wheel, thus avoiding waste caused by continuous seed sowing. Similarly, when sowing is needed, the seed metering device can continue to work simply by controlling the transmission between the rotating shaft and the power input shaft through the clutch mechanism, making it more convenient to use.

[0007] Furthermore, the clutch mechanism includes a connecting shaft fixedly connected coaxially to the rotating shaft. A rotating sleeve is fixedly installed at one end of the power input shaft near the rotating shaft. The inner wall of the rotating sleeve is provided with an engagement groove. An engagement rod capable of engaging with the engagement groove is rotatably installed on the connecting shaft. Through the arrangement of the engagement groove and the engagement rod, when the rotating shaft and the power input shaft need to drive each other, the engagement rod engages with the engagement groove; when the drive between the two is not needed, the engagement rod disengages from the engagement groove.

[0008] Furthermore, the connecting shaft includes a first shaft portion with a larger diameter and a second shaft portion with a smaller diameter. The first shaft portion is fixedly connected to the rotating shaft, and the rotating sleeve is sleeved on the second shaft portion. This structure makes the connection between the rotating sleeve and the connecting shaft more stable.

[0009] Furthermore, the engaging rod includes a rotating part rotatably mounted within the first shaft portion and an engaging part rotatably mounted on the outer wall of the second shaft portion, the engaging part being capable of engaging with the engaging groove. This structure makes the rotation of the engaging rod more stable.

[0010] Furthermore, the first shaft portion is provided with a mounting groove, and a pressing plate is fixedly installed at one end of the rotating portion near the rotating shaft. The end of the pressing plate away from the rotating portion extends to the outside of the connecting shaft. A limiting mechanism is also installed on the outer wall of the first shaft portion. The limiting mechanism can abut against the pressing plate, causing the engaging portion to engage in the engaging groove. An electric push rod is also fixedly installed on the housing. The output end of the electric push rod can abut against the pressing plate. When the output end of the electric push rod abuts against the pressing plate, the engaging portion disengages from the engaging groove. Through the setting of the limiting mechanism and the electric push rod, when the output end of the electric push rod is not extended, the limiting mechanism can abut against the pressing plate, thereby ensuring that the engaging portion is always engaged with the engaging groove. When the output end of the electric push rod extends, the engaging portion disengages from the engaging groove.

[0011] Furthermore, the limiting mechanism includes a mounting shell fixedly installed on the outer side of the first shaft portion. A limiting rod slidably mounted on the mounting shell, penetrating the mounting shell, abuts against the extrusion plate. A limiting groove is provided inside the mounting shell. A fixing plate is fixedly installed at the middle of the limiting rod, and the fixing plate is slidably installed within the limiting groove. A spring is fixedly installed on the fixing plate, and the end of the spring away from the fixing plate is fixedly connected to the inner wall of the limiting groove. This structure ensures that the limiting rod always remains in contact with the extrusion plate.

[0012] Furthermore, the limiting mechanism, engaging rod, engaging groove, and pressing plate each have two parallel components symmetrically aligned with the connecting shaft. A connecting plate is fixedly installed on the inner side of each pressing plate. The two connecting plates are connected by a connecting rod, the middle of which is rotatably connected to the first shaft, and both ends of which are rotatably slidably connected to the connecting plates. This connecting rod arrangement ensures that when one pressing plate drives the engaging rod to rotate, the other engaging rod will also rotate relative to it.

[0013] Furthermore, sliding posts are fixedly installed at both ends of the connecting rod, and a sliding groove is provided on the connecting plate. The sliding posts and sliding grooves are rotatably slidably engaged. The sliding posts and sliding grooves allow the sliding posts to both rotate and slide on the connecting plate.

[0014] Furthermore, an annular wear-resistant plate is fixedly installed on the inner side of the housing, and the annular wear-resistant plate has protrusions. The wear-resistant plate reduces frictional wear on the seed metering device. When the finger-type seed-picking mechanism carries the seed past the protrusions, it vibrates, thereby shaking off excess seeds and ensuring single-seed sowing.

[0015] Furthermore, a brush is also fixedly installed inside the casing. The brush design further ensures single-seed sowing by the seed metering device.

[0016] In summary, the beneficial effects of this utility model are as follows:

[0017] 1. By adding a clutch mechanism between the rotating shaft and the power input shaft, when the seeder needs to move for a short period of time but does not need to sow, it is no longer necessary to lift the transmission wheel. Instead, the transmission between the rotating shaft and the power input shaft is disconnected by controlling the electric actuator, thus stopping the seeder from working. This method is more convenient to use and can also improve the sowing efficiency.

[0018] 2. The protrusions allow the finger-clamp seed-taking mechanism to vibrate once when it passes over them, thus shaking off excess seeds and ensuring single-seed sowing by the seed metering device. Attached Figure Description

[0019] Figure 1 This is a first-view schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the overall structure of the present invention from a second perspective;

[0021] Figure 3 This is a schematic diagram of the internal structure of the casing;

[0022] Figure 4 This is a schematic diagram of the clutch mechanism.

[0023] Figure 5 for Figure 4 Cross-sectional view of the "AA" position in the middle;

[0024] Figure 6 for Figure 4 Cross-sectional view of the "BB" position in the middle;

[0025] Figure 7 This is a schematic diagram of the connecting shaft.

[0026] Figure 8 This is a schematic diagram of the connecting rod structure;

[0027] Figure 9 This is a schematic diagram of the locking rod.

[0028] In the diagram: 1-Machine casing; 11-Seed guide tube; 12-Sowing port; 13-Finger-type seed picking mechanism; 14-Mounting cover; 15-Wear-resistant plate; 16-Rotating shaft; 17-Protrusion; 18-Brush; 19-Seed inlet; 2-Power input shaft; 21-Rotating sleeve; 22-Clamping groove; 3-Connecting shaft; 31-Extrusion plate; 32-Connecting plate; 33-Connecting rod; 34-Rotating part; 35-Mounting groove; 36-Clamping part; 37-Fixing column; 38-Sliding column; 39-Sliding groove; 4-Limiting mechanism; 41-Mounting shell; 42-Limiting rod; 43-First limiting plate; 44-Second limiting plate; 45-Spring; 46-Fixing plate; 5-Electric push rod. Detailed Implementation

[0029] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0030] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0031] The following is a description of preferred embodiments of the present invention in conjunction with the accompanying drawings.

[0032] like Figures 1 to 3As shown, this utility model provides a seed metering device, including a housing 1. A seed guide tube 11 is fixedly installed on one side of the housing 1. The top of the seed guide tube 11 is connected to the seed box of the seeder, and the bottom is connected to the inner side of the housing 1. A seeding port 12 is provided at the bottom of the housing 1. A seed outlet 19 communicating with the seeding port 12 is provided inside the housing 1. A mounting cover 14 is also rotatably installed inside the housing 1. A finger-clamp seed-taking mechanism 13 is installed on the mounting cover 14. Both the mounting cover 14 and the finger-clamp seed-taking mechanism 13 are prior art, so they will not be described in detail here. A rotating shaft 16 is fixedly installed in the middle of the mounting cover 14. The end of the rotating shaft 16 away from the mounting cover 14 extends out of the housing 1 and is connected to the power input shaft 2. A clutch mechanism capable of disconnecting or enabling the two to drive each other is installed between the rotating shaft 16 and the power input shaft 2.

[0033] As a further illustration of this example, an annular wear-resistant plate 15 is also fixedly installed inside the housing 1, and the annular wear-resistant plate 15 is provided with a protrusion 17. After the finger-clamp seed-taking mechanism 13 completes seed taking, it carries the seed through the wear-resistant plate 15 and then through the protrusion 17. When it passes through the protrusion 17, the finger-clamp seed-taking mechanism 13 will bounce under the action of the torsion spring, thereby shaking off the excess seeds on one finger clamp plate, thus ensuring single sowing.

[0034] A brush 18 is also fixedly installed between the protrusion 17 and the seed inlet 19, and the brush 18 is fixedly installed on the housing 1. The brush 18 is designed to prevent excess seeds from being shaken off when passing through the protrusion 17, and thus sweeps them away when they pass through the brush 18, further ensuring single-seed planting by the seed metering device.

[0035] like Figure 4 , Figure 6 , Figure 7 As shown, the clutch mechanism includes a connecting shaft 3 that is coaxially and fixedly connected to the rotating shaft 16. A rotating sleeve 21 is fixedly installed at one end of the power input shaft 2 near the rotating shaft 16. The inner wall of the rotating sleeve 21 is provided with a locking groove 22. A locking rod that can engage with the locking groove 22 is rotatably installed on the connecting shaft 3.

[0036] like Figure 4 , Figure 7 As shown, the connecting shaft 3 includes a first shaft part with a larger diameter and a second shaft part with a smaller diameter. The first shaft part is fixedly connected to the rotating shaft 16, and the rotating sleeve 21 is sleeved on the second shaft part.

[0037] like Figure 6 , Figure 7 , Figure 9As shown, the engaging rod includes a rotating part 34 and an engaging part 36. A through hole is provided at the edge of the first shaft part, and the rotating part 34 is rotatably installed in the through hole. A rotating groove is provided on the side wall of the second shaft part, and the engaging part 36 is rotatably installed in the rotating groove. When the engaging part 36 is not engaged with the engaging groove 22, the second shaft part and the engaging part 36 form a cylinder, and the rotating sleeve 21 is fitted on the outside of the cylinder.

[0038] like Figures 4 to 7 As shown, a mounting groove 35 is provided in the first shaft portion. A pressing plate 31 is fixedly installed at one end of the rotating part 34 near the rotating shaft 16. The end of the pressing plate 31 away from the rotating part 34 extends to the outside of the connecting shaft 3. A limiting mechanism 4 is also installed on the outer wall of the first shaft portion. The limiting mechanism 4 can abut against the pressing plate 31 so that the engaging part 36 is engaged in the engaging groove 22. An electric push rod 5 is also fixedly installed on the housing 1. The output end of the electric push rod 5 can abut against the pressing plate 31. When the output end of the electric push rod 5 abuts against the pressing plate 31, the engaging part 36 disengages from the engaging groove 22.

[0039] like Figure 2 , Figure 5 As shown, the limiting mechanism 4 described above includes a mounting shell 41 fixedly installed on the outside of the first shaft portion. A limiting groove is provided inside the mounting shell 41. A limiting rod 42, penetrating the mounting shell 41 and the limiting groove, is slidably mounted on the mounting shell 41, and the limiting rod 42 abuts against the extrusion plate 31. A fixing plate 46 is fixedly installed on the limiting rod 42 located within the limiting groove. The shape of the fixing plate 46 is the same as the cross-sectional shape of the limiting groove, and the fixing plate 46 slides against the inner wall of the limiting groove. A spring 45 is fixedly installed on the fixing plate 46, with one end of the spring 45 away from the fixing plate 46 fixedly connected to the end of the limiting groove away from the extrusion plate 31. A second limiting plate 44 is also fixedly installed on the portion of the limiting rod 42 located outside the limiting groove and close to the extrusion plate 31 to prevent excessive sliding of the limiting rod 42. Similarly, a first limiting plate 43 is installed on the end of the limiting rod 42 away from the extrusion plate 31 to prevent excessive sliding of the limiting rod 42.

[0040] For example, 5 to Figure 8 As shown, the limiting mechanism 4, the engaging rod, the engaging groove 22, and the pressing plate 31 each have two parallel joints symmetrical to the center of the connecting shaft 3. A connecting plate 32 is fixedly installed on the inner side of each pressing plate 31. The two connecting plates 32 are connected by a connecting rod 33. The middle part of the connecting rod 33 is rotatably connected to the first shaft via a fixed post 37. Both ends of the connecting rod 33 are rotatably slidably connected to the connecting plate 32. Specifically, both ends of the connecting rod 33 are fixedly installed with sliding posts 38, and the connecting plate 32 is provided with a sliding groove 39. The sliding posts 38 and the sliding groove 39 are rotatably slidably engaged.

[0041] The operating principle of this device is as follows: Under normal sowing conditions, the output end of the electric push rod 5 is not extended, and the limiting rod 42 abuts against the pressing plate 31. At this time, the engaging part 36 is located in the engaging groove 22, so the rotating shaft 16 also rotates under the drive of the power input shaft 2. When the seeder does not need to sow for a short period of time, the electric push rod 5 is extended by controlling it. When any pressing plate 31 passes the position of the electric push rod 5, it will be blocked. As the connecting shaft 3 continues to rotate, the pressing plate 31 cannot continue to rotate, that is, the two rotate relative to each other. At this time, the engaging part 36 will disengage from the engaging groove 22. When the engaging part 36 disengages from the engaging groove 22, the rotating sleeve 21 cannot drive the connecting shaft 3 to continue to rotate, thereby disconnecting the transmission between the rotating shaft 16 and the power input shaft 2. When restoration is needed, simply retract the output shaft of the electric actuator 5. At this time, when the engaging groove 22 on the rotating sleeve 21 moves to the position of the engaging part 36, the limiting rod 42 drives the pressing plate 31 to rotate under the action of the spring 45, thereby causing the engaging part 36 to return to the engaging groove 22, thus restoring the transmission between the rotating shaft 16 and the power input shaft 2.

[0042] In summary, the seed metering device provided by this invention adds a clutch mechanism between the rotating shaft 16 and the power input shaft 2. This allows the seeder to move quickly but not sow seeds without lifting the transmission wheel. Instead, the electric push rod 5 controls the clutch mechanism to disconnect the transmission between the rotating shaft 16 and the power input shaft 2, thus stopping the seeder from working. This method is more convenient to use and can improve sowing efficiency. The protrusion 17 allows the finger-clamp seed-taking mechanism 13 to vibrate when it passes over the protrusion 17, thereby shaking off excess seeds from the finger-clamp seed-taking mechanism 13 and further ensuring single-seed sowing by the seed metering device.

[0043] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. A seed metering device, characterized in that, The device includes a housing (1), on one side of which a seed guide tube (11) is fixedly installed. A seeding port (12) is provided at the bottom of the housing (1). An installation cover (14) is rotatably installed inside the housing (1). A finger-clamp seed-taking mechanism (13) is installed on the installation cover (14). A rotating shaft (16) is fixedly installed in the middle of the installation cover (14). A power input shaft (2) is connected to the end of the rotating shaft (16) away from the installation cover (14). A clutch mechanism capable of cutting off or making the two drive each other is installed between the rotating shaft (16) and the power input shaft (2).

2. The seed metering device according to claim 1, characterized in that, The clutch mechanism includes a connecting shaft (3) that is coaxially fixedly connected to the rotating shaft (16). A rotating sleeve (21) is fixedly installed at one end of the power input shaft (2) near the rotating shaft (16). A locking groove (22) is provided on the inner wall of the rotating sleeve (21). A locking rod that can engage with the locking groove (22) is rotatably installed on the connecting shaft (3).

3. The seed metering device according to claim 2, characterized in that, The connecting shaft (3) includes a first shaft portion with a larger diameter and a second shaft portion with a smaller diameter. The first shaft portion is fixedly connected to the rotating shaft (16), and the rotating sleeve (21) is sleeved on the second shaft portion.

4. The seed metering device according to claim 3, characterized in that, The engaging rod includes a rotating part (34) rotatably mounted in the first shaft and an engaging part (36) rotatably mounted on the outer wall of the second shaft, the engaging part (36) being able to engage with the engaging groove (22).

5. The seed metering device according to claim 4, characterized in that, The first shaft is provided with a mounting groove (35). The end of the rotating part (34) near the rotating shaft (16) is fixedly installed with a pressing plate (31). The end of the pressing plate (31) away from the rotating part (34) extends to the outside of the connecting shaft (3). A limiting mechanism (4) is also installed on the outer wall of the first shaft. The limiting mechanism (4) can abut against the pressing plate (31) so that the engaging part (36) is engaged in the engaging groove (22). An electric push rod (5) is also fixedly installed on the housing (1). The output end of the electric push rod (5) can abut against the pressing plate (31). When the output end of the electric push rod (5) abuts against the pressing plate (31), the engaging part (36) disengages from the engaging groove (22).

6. The seed metering device according to claim 5, characterized in that, The limiting mechanism (4) includes a mounting shell (41) fixedly installed on the outside of the first shaft. A limiting rod (42) that penetrates the mounting shell (41) is slidably installed on the mounting shell (41). The limiting rod (42) abuts against the extrusion plate (31). A limiting groove is provided inside the mounting shell (41). A fixing plate (46) is fixedly installed in the middle of the limiting rod (42). The fixing plate (46) is slidably installed in the limiting groove. A spring (45) is fixedly installed on the fixing plate (46). One end of the spring (45) away from the fixing plate (46) is fixedly connected to the inner wall of the limiting groove.

7. The seed metering device according to claim 6, characterized in that, The limiting mechanism (4), the locking rod, the locking groove (22), and the pressing plate (31) each have two parallel joints symmetrical to the center of the connecting shaft (3). The inner side of the pressing plate (31) is fixedly installed with a connecting plate (32). The two connecting plates (32) are connected by a connecting rod (33). The middle part of the connecting rod (33) is rotatably connected to the first shaft. The two ends of the connecting rod (33) are rotatably slidably connected to the connecting plate (32).

8. The seed metering device according to claim 7, characterized in that, Both ends of the connecting rod (33) are fixedly installed with sliding columns (38), and the connecting plate (32) is provided with a sliding groove (39). The sliding column (38) and the sliding groove (39) are rotatably slidingly engaged.

9. The seed metering device according to claim 1, characterized in that, An annular wear-resistant plate (15) is also fixedly installed on the inner side of the housing (1), and the annular wear-resistant plate (15) is provided with a protrusion (17).

10. The seed metering device according to claim 9, characterized in that, A brush (18) is also fixedly installed inside the casing (1).

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