A seed metering device

Abstract

This invention relates to the field of seeding equipment technology and discloses a seed metering device, comprising: a shell, a rotating disk, a baffle, and a first seed cleaning structure; the shell has a cavity; the shell has a seed inlet, a seed outlet, and an air extraction hole; the rotating disk is rotatably disposed within the cavity, and the rotating disk divides the cavity into a first cavity and a second cavity; the rotating disk is sealed to the edge of the first cavity; the air extraction hole communicates with the first cavity; the baffle is fixedly disposed within the second cavity; the baffle divides the second cavity into a first region and a second region; the rotating disk has suction holes, and the suction holes located in the first region communicate with the first cavity, while the suction holes located in the second region are disconnected from the first cavity; the first seed cleaning structure includes a plate fixedly connected to the shell, a seed cleaning component rotatably connected to the plate, and a driving component rotatably connected to the plate; the seed cleaning component is located within the first region; the driving component can drive the seed cleaning component to rotate. This effectively ensures that seeds are output at a uniform speed in a predetermined quantity.

Description

Technical Field

[0001] This invention relates to the field of seeding equipment technology, and in particular to a seed metering device. Background Technology

[0002] Currently, mechanized sowing is a standard practice in modern agriculture. Mechanized sowing involves processing seeds within a limited sowing time, based on actual agricultural conditions. Seed metering, as the most crucial part of the sowing process, directly impacts crop growth and yield, and consequently, sowing quality.

[0003] As the seeder moves, the seed metering device outputs a predetermined number of seeds at a uniform speed. In conjunction with the seeder's uniform movement, the seeds are sown in the soil at predetermined distances.

[0004] Existing seed metering devices generally use air suction seed metering devices. However, the suction holes in existing air suction seed metering devices may absorb a number of seeds that are not predetermined, causing the seed metering device to output a number of seeds that are not predetermined at the same location, resulting in a number of seeds that are not predetermined on the same plot of land, which affects the subsequent plant growth.

[0005] Existing air-suction seed metering devices cannot effectively guarantee the uniform output of seeds in a predetermined quantity. Summary of the Invention

[0006] The purpose of this invention is to provide a seed metering device that can effectively ensure the uniform output of seeds in a predetermined quantity to guarantee the normal growth of plants in the later stages.

[0007] To achieve the above objectives, the present invention provides a seed metering device, comprising: a housing, a rotating disk, a baffle, and a first seed cleaning structure;

[0008] The outer shell has a cavity; the outer shell is provided with a seed inlet, a seed outlet, and an air extraction hole;

[0009] The rotating disk is rotatably disposed within the cavity, and the rotating disk divides the cavity into a first cavity and a second cavity; the rotating disk is sealed and fitted to the edge of the first cavity;

[0010] The air extraction port is connected to the first cavity, and the air extraction port is used to connect to the negative pressure air pipe.

[0011] The baffle is fixedly disposed in the second cavity and contacts the rotating disk; the baffle divides the second cavity into a first region and a second region; the seed inlet is connected to the first region and the seed outlet is connected to the second region;

[0012] The rotating disk has suction holes, and the suction holes located in the first region are connected to the first cavity, while the suction holes located in the second region are disconnected from the first cavity.

[0013] The first seed cleaning structure includes a plate fixedly connected to the outer shell, a seed cleaning component rotatably connected to the plate, and a driving component rotatably connected to the plate; the seed cleaning component is located in the first region; the driving component can drive the seed cleaning component to rotate.

[0014] The outer casing has a through hole for the rotating shaft to pass through. The rotating shaft is rotatably connected to the outer casing, and the outer casing is fixedly connected to the rotating disk. The rotating shaft is used for transmission connection with the output end of the motor.

[0015] The first cavity is an arc-shaped groove, and the edge of the groove is sealed and fitted to the rotating disk.

[0016] As the suction hole rotates, it exerts suction when it is above the groove. When the suction hole leaves the groove, it disconnects from the groove, and the suction disappears.

[0017] Compared with the prior art, the seed metering device of this invention has the following advantages: by setting an air extraction hole to evacuate the first cavity, the suction hole connected to the first cavity has suction force to adsorb the seeds in the first area. When the suction hole rotates to the second area and approaches the seed metering port, the suction force of the suction hole disappears and the seeds are discharged from the seed metering port.

[0018] The user rotates the drive unit, which in turn drives the seed cleaner to rotate, causing the seed cleaner to move closer to or further away from the suction hole. This ensures that the closest distance between the seed cleaner and the suction hole is limited to a predetermined number of seeds, guaranteeing that the suction hole can only carry a predetermined number of seeds through the seed cleaner. Typically, the suction hole can only pick up one seed at a time, ensuring that the seed metering device outputs a uniform predetermined number of seeds each time, thus guaranteeing the planting density of the land and the subsequent yield of the plants.

[0019] Furthermore, the driving component has an arc-shaped through hole, and the rotational connection between the driving component and the plate is spaced apart from the center of the arc-shaped through hole; the seed cleaning component is fixedly provided with a limiting pin, and the limiting pin is slidably inserted into the arc-shaped through hole. When the driving component is rotated, because the rotational connection between the driving component and the plate is spaced apart from the center of the arc-shaped through hole (i.e., eccentrically positioned), the limiting pin moves accordingly. The moving limiting pin drives the seed cleaning component to rotate, causing the seed cleaning component to rotate closer to or further away from the suction hole, thereby adjusting the distance between the seed cleaning component and the suction hole to accommodate seeds of different sizes or allow different amounts of seeds to pass through; by rotating the driving component to drive the rotation of the seed cleaning component, the user can easily control the amount of rotation of the seed cleaning component.

[0020] Because the seeds are relatively small in size and the differences between different seeds are also small, the amount of rotation required for the seed cleaning component is very small. It is difficult to control the amount of rotation when directly rotating the seed cleaning component. The user can rotate the drive component by a larger amount, but the amount of rotation required for the seed cleaning component is small, which can avoid directly rotating the seed cleaning component.

[0021] Furthermore, the plate body has multiple limiting holes, and the driving component has a limiting end for insertion into the limiting holes; the multiple limiting holes are spaced apart along the movement trajectory of the limiting end. The limiting holes facilitate the insertion of the limiting end and ensure that the driving component does not rotate arbitrarily. Providing multiple limiting holes allows the limiting end to be inserted and limited in the corresponding limiting hole after the driving component has rotated a certain amount.

[0022] Furthermore, the first seed cleaning structure also includes a limiting member spaced apart from the plate; the seed cleaning member is located between the plate and the limiting member; the limiting member is slidably connected to the plate. The limiting member restricts the seed cleaning member from moving vertically along the plate, preventing it from falling off the plate.

[0023] Furthermore, a second seed-cleaning structure is included, comprising a knob and a seed-cleaning rod. The knob is rotatably connected to the outer casing. One end of the seed-cleaning rod is fixedly connected to the knob, and the other end of the seed-cleaning rod is close to the suction hole. The seed-cleaning rod is located within the first region. The extension direction of the seed-cleaning rod is spaced apart from the axis of the knob. The extension direction of the seed-cleaning rod is spaced apart from the axis of the knob, i.e., the seed-cleaning rod and the knob are eccentrically positioned. When the knob is rotated, one end of the seed-cleaning rod rotates along a predetermined circle, causing that end of the seed-cleaning rod to move closer to or further away from the suction hole, adapting to different seed sizes and allowing different predetermined numbers of seeds to pass through. The first and second seed-cleaning structures cooperate to effectively limit the number of seeds on the suction hole.

[0024] Furthermore, the system also includes a support frame and a rotating frame, with the rotating frame rotatably connected to the support frame, and the outer shell fixedly connected to the rotating frame. Through the cooperation of the support plate and the rotating frame, the outer shell and the rotating disk can rotate, changing the angle between the rotating disk and the horizontal plane to accommodate seeds of different shapes. Seed heads are generally small, and when a seed head inserts into the suction hole, the suction force of the suction hole decreases, causing the seed to easily fall out. Especially when arranging flat seeds, reducing the angle between the plane of the rotating disk and the horizontal plane, making the rotating disk more parallel to the horizontal plane, allows more seeds to have their sides parallel to the rotating disk, reducing the likelihood of seed heads inserting into the suction hole. This effectively increases the probability that each suction hole can firmly hold a seed, thus increasing the seed filling rate of the rotating disk.

[0025] Furthermore, the support frame has an arc-shaped limiting opening, and the rotating frame is fixedly provided with a limiting rod for slidingly inserting into the limiting opening. The cooperation between the limiting opening and the limiting member restricts the rotation angle of the rotating disk, and the limiting member can fix the rotating disk in a predetermined position, preventing arbitrary rotation of the rotating disk from affecting the seeding effect.

[0026] Furthermore, the outer casing includes a first housing and a second housing, which are detachably connected. The use of the first and second housings facilitates the installation of components such as rotating disks within the cavity.

[0027] Furthermore, the rotating disk is provided with guide grooves, and the suction holes are located in the guide grooves. There are multiple guide grooves and multiple suction holes, each corresponding to a specific number, and these multiple suction holes and guide grooves are distributed at intervals along the circumference of the rotating disk. Multiple guide grooves and multiple suction holes can improve the sowing rate.

[0028] Furthermore, it also includes a stirring wheel rotatably connected to the second cavity, the stirring wheel being located within the first region; the stirring wheel has teeth, and the teeth mesh with the sidewalls of each of the guide channels. Multiple guide channels, spaced apart, form teeth that mesh with the stirring wheel. This ensures that when the rotating disk rotates, the guide channels drive the stirring wheel to rotate, and the stirring wheel stirs the seeds within the first region, preventing seeds from accumulating in any one guide channel and ensuring a relatively uniform number of seeds within the guide channels. The stirring by the stirring wheel also reduces the likelihood of seed heads being perpendicular to the rotating disk, reducing the likelihood of seed heads inserting into the suction holes, and improving the seed filling rate of the rotating disk. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the seed metering device assembled on the support frame according to an embodiment of the present invention;

[0030] Figure 2 This is an exploded view of the seed metering device according to an embodiment of the present invention;

[0031] Figure 3 This is an overall structural diagram of the seed metering device according to an embodiment of the present invention;

[0032] Figure 4 This is a second shell structure diagram according to an embodiment of the present invention;

[0033] Figure 5 This is a front view of the first seed structure according to an embodiment of the present invention;

[0034] Figure 6 This is a back view of the first seed structure according to an embodiment of the present invention;

[0035] Figure 7 This is a schematic diagram of the first seed structure according to an embodiment of the present invention;

[0036] In the diagram, 1. Outer shell; 11. First shell; 111. First cavity; 112. Air extraction port; 12. Second shell; 121. Seed inlet; 122. Seed discharge port; 123. Second cavity; 124. First region; 125. Second region; 126. Flow limiting plate; 2. Baffle; 21. Brush; 3. Rotating disk; 31. Suction hole; 32. Guide groove; 33. Rotating shaft; 4. First seed cleaning structure; 41. Plate body; 411, limiting hole; 42, seed cleaning component; 421, limiting pin; 43, driving component; 431, arc-shaped through hole; 432, limiting end; 44, limiting component; 5, second seed cleaning structure; 51, knob; 52, seed cleaning rod; 6, support frame; 61, limiting port; 7, rotating frame; 71, limiting rod; 8, stirring wheel; 9, frame; 10, limiting mechanism; 101, telescopic block; 102, adjusting block. Detailed Implementation

[0037] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0038] In the description of this invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention 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, and therefore should not be construed as a limitation of the invention. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0039] like Figure 1-7 As shown, a seed metering device according to a preferred embodiment of the present invention includes: a housing 1, a rotating disk 3, a baffle 2, and a first seed cleaning structure 4;

[0040] The outer shell 1 has a cavity; the outer shell 1 is provided with a seed inlet 121, a seed outlet 122, and an air extraction hole 112;

[0041] The rotating disk 3 is rotatably disposed in the cavity, and the rotating disk 3 divides the cavity into a first cavity 111 and a second cavity 123; the rotating disk 3 is sealed and fitted to the edge of the first cavity 111;

[0042] The air extraction port 112 is connected to the first cavity 111, and the air extraction port 112 is used to connect to the negative pressure air pipe.

[0043] The baffle 2 is fixedly installed inside the second cavity 123 and is in contact with the rotating disk 3; the baffle 2 divides the second cavity 123 into a first region and a second region 124; 125; the seed inlet 121 is connected to the first region, and the seed outlet 122 is connected to the second region 124; 125.

[0044] The rotating disk 3 has suction holes 31, and the suction holes 31 located in the first region are connected to the first cavity 111, while the suction holes 31 located in the second region 124 are disconnected from the first cavity 111.

[0045] The first seed cleaning structure 4 includes a plate 41 fixedly connected to the outer shell 1, a seed cleaning component 42 rotatably connected to the plate 41, and a driving component 43 rotatably connected to the plate 41; the seed cleaning component 42 is located in the first area; the driving component 43 can drive the seed cleaning component 42 to rotate.

[0046] The outer casing 1 has a through hole for the rotating shaft 33 to pass through. The rotating shaft 33 is rotatably connected to the outer casing 1, and the outer casing 1 is fixedly connected to the rotating disk 3. The rotating shaft 33 is used for transmission connection with the output end of the motor.

[0047] The first cavity 111 is an arc-shaped groove, and the edge of the groove is sealed and fitted with the rotating disk 3.

[0048] As the suction hole 31 rotates, when the suction hole 31 is above the groove, the suction hole 31 has a suction force. When the suction hole 31 leaves the groove, the suction hole 31 is disconnected from the groove, and the suction force of the suction hole 31 disappears.

[0049] Compared with the prior art, the seed metering device of this invention has the following advantages: by setting an air extraction hole 112 to evacuate the first cavity 111, the suction hole 31 communicating with the first cavity 111 has suction force to adsorb seeds in the first area. When the suction hole 31 rotates to the second area 124 of the first area 125 and approaches the seed metering port 122, the suction force of the suction hole 31 disappears, and the seeds are discharged from the seed metering port 122.

[0050] The user rotates the drive component 43, which in turn drives the seed cleaning component 42 to rotate, causing the seed cleaning component 42 to move closer to or further away from the suction hole 31. This ensures that the closest distance between the seed cleaning component 42 and the suction hole 31 is limited to a predetermined number of seeds, guaranteeing that the suction hole 31 can only carry a predetermined number of seeds through the seed cleaning component 42. Typically, the suction hole 31 can only adsorb one seed at a time as it passes through the seed cleaning component 42. This seed metering device ensures that the number of seeds output each time is a uniform predetermined number, guaranteeing the planting density of the land and ensuring the yield of the plants in the later stages.

[0051] In one embodiment, the driving member 43 has an arc-shaped through hole 431, and the rotational connection between the driving member 43 and the plate 41 is spaced apart from the center of the arc-shaped through hole 431; the seed cleaning member 42 is fixedly provided with a limiting pin 421, and the limiting pin 421 is slidably inserted into the arc-shaped through hole 431. When the driving member 43 is rotated, since the rotational connection between the driving member 43 and the plate 41 is spaced apart from the center of the arc-shaped through hole 431, i.e., eccentrically set, the limiting pin 421 moves accordingly. The moving limiting pin 421 drives the seed cleaning member 42 to rotate, and the seed cleaning member 42 rotates closer to or further away from the suction hole 31, thereby adjusting the distance between the seed cleaning member 42 and the suction hole 31 to accommodate seeds of different sizes or allow different amounts of seeds to pass through; by rotating the driving member 43 to drive the rotation of the seed cleaning member 42, it is convenient for the user to control the amount of rotation of the seed cleaning member 42.

[0052] Because the seeds are relatively small in size and the differences between different seeds are also relatively small, the amount of rotation required for the seed cleaning component 42 is very small. It is difficult to control the amount of rotation when directly rotating the seed cleaning component 42. The amount of rotation of the user rotating the drive component 43 can be larger, but the amount of rotation of the seed cleaning component 42 is smaller, which can avoid directly rotating the seed cleaning component 42.

[0053] Specifically, the driving component 43 can drive the cleaning component 42 to move along a predetermined arc trajectory, and the center of the arc trajectory is at the rotational connection between the cleaning component 42 and the plate 41, thus ensuring that the cleaning component 42 can rotate smoothly.

[0054] In one embodiment, the plate 41 has multiple limiting holes 411, and the driving member 43 has a limiting end 432 for insertion into the limiting holes 411; the multiple limiting holes 411 are spaced apart along the moving trajectory of the limiting end 432. The limiting holes 411 facilitate the insertion of the limiting end 432, ensuring that the driving member 43 will not rotate arbitrarily. By providing multiple limiting holes 411, it is possible for the limiting end 432 to be inserted and limited in the corresponding limiting hole 411 after the driving member 43 rotates by a certain amount.

[0055] In one embodiment, the first seed cleaning structure 4 further includes a limiting member 44 spaced apart from the plate 41; the seed cleaning member 42 is located between the plate 41 and the limiting member 44; the limiting member 44 is slidably connected to the plate 41. The limiting member 44 restricts the movement of the seed cleaning member 42 along the vertical direction of the plate 41, preventing the seed cleaning member 42 from falling off the plate 41.

[0056] Specifically, the limiting member 44 is rod-shaped and is rotatably connected to the plate 41. The cleaning member 42 is fixedly provided with a limiting groove for the limiting member 44 to slide into. The use of a rod-shaped limiting member 44 can reduce the use of materials while ensuring the normal function of the limiting member.

[0057] In one embodiment, a second seed cleaning structure 5 is further included. The second seed cleaning structure 5 includes a knob 51 and a seed cleaning rod 52. The knob 51 is rotatably connected to the outer casing 1. One end of the seed cleaning rod 52 is fixedly connected to the knob 51, and the other end of the seed cleaning rod 52 is close to the suction hole 31. The seed cleaning rod 52 is located within a first region. The extension direction of the seed cleaning rod 52 is spaced apart from the axis of the knob 51. The extension direction of the seed cleaning rod 52 is spaced apart from the axis of the knob 51, that is, the seed cleaning rod 52 and the knob 51 are eccentrically arranged. When the knob 51 is rotated, one end of the seed cleaning rod 52 rotates along a predetermined circle, so that the end of the seed cleaning rod 52 moves closer to or further away from the suction hole 31, in order to accommodate different seed sizes and allow different predetermined numbers of seeds to pass through. The first seed cleaning structure 4 and the second seed cleaning structure 5 cooperate with each other to effectively limit the number of seeds on the suction hole 31.

[0058] In one embodiment, the system further includes a support frame 6 and a rotating frame 7, with the rotating frame 7 rotatably connected to the support frame 6 and the outer casing 1 fixedly connected to the rotating frame 7. Through the cooperation of the support frame and the rotating frame 7, the outer casing 1 and the rotating disk 3 are rotated, changing the angle between the rotating disk 3 and the horizontal plane to accommodate seeds of different shapes. Seed heads are generally small, and when a seed head inserts into the suction hole 31, the suction force of the suction hole 31 on the seed decreases, causing the seed to easily fall off. Especially when arranging flat seeds, reducing the angle between the plane of the rotating disk 3 and the horizontal plane, making the rotating disk 3 more parallel to the horizontal plane, allows more seeds to have their sides parallel to the rotating disk 3, reducing the likelihood of seed heads inserting into the suction hole 31. This effectively increases the probability that each suction hole 31 can firmly hold a seed, thus increasing the seed filling rate of the rotating disk 3.

[0059] In one embodiment, the support frame 6 has an arc-shaped limiting opening 61, and the rotating frame 7 is fixedly provided with a limiting rod 71 for slidingly inserting into the limiting opening 61. The cooperation between the limiting opening 61 and the limiting member 44 is used to limit the rotation angle of the rotating disk 3, and the limiting member 44 can restrict and fix the rotating disk 3 in a predetermined position. This prevents arbitrary rotation of the rotating disk 3 from affecting the seeding effect.

[0060] Specifically, when the limiting member 44 is at one end of the arc-shaped limiting port 61, when it slides to the other end, the plane where the rotating disk 3 is located is perpendicular to the horizontal plane. When the limiting member 44 is at the other end of the arc-shaped limiting port 61, the angle between the plane where the rotating disk 3 is located and the horizontal plane is 10° to 20°.

[0061] In one embodiment, the outer casing 1 includes a first casing 11 and a second casing 12, which are detachably connected. The use of the first casing 11 and the second casing 12 facilitates the installation of components such as the rotating disk 3 within the cavity.

[0062] In one embodiment, the first cavity 111 is located in the first housing 11, the second cavity 123 is located in the second housing 12, the air extraction hole 112 is opened on the first housing 11, the seed inlet 121 and the seed outlet 122 are both opened on the second housing 12, and the baffle 2 is fixedly connected to the interior of the second housing 12.

[0063] Specifically, a flow limiting plate 126 is provided at the seed inlet 121 in the first area. The flow limiting plate 126 is provided with multiple insertion holes distributed along a predetermined straight line. The second housing 12 is provided with assembly holes. The insertion holes and assembly holes are fixed by pins. By inserting the pins into different insertion holes, the opening degree of the seed inlet 121 can be controlled.

[0064] Specifically, the first housing 11, the second housing 12, and the rotating frame 7 are all connected together by a single bolt, which facilitates installation and disassembly and reduces the use of bolts.

[0065] In one embodiment, a groove is provided on the baffle 2, and a brush 21 is inserted and fixed in the groove. The brush 21 contacts the rotating disk 3, dividing the rotating disk 3 into a first region and a second region 124; 125. The brush 21 can effectively block the seeds from passing through, but does not affect the rotation of the rotating disk 3.

[0066] In one embodiment, a limiting mechanism 10 is fixedly provided on the second housing 12 of the second region 124 and the first region 125; the limiting mechanism 10 is spaced apart from the rotating disk 3 and is close to the seed outlet 122. The limiting member 44 is used to restrict the movement of the rotating disk 3 along the extension direction of the rotating shaft 33.

[0067] The limiting mechanism 10 includes a telescopic block 101, an adjusting block 102, and a spring. The adjusting block 102 is threadedly connected to the second housing 12, and the telescopic block 101 is rotatably connected to the adjusting block 102. The spring abuts against the telescopic block 101 and the second housing 12. By rotating the adjusting block 102, the telescopic block 101 moves closer to or further away from the rotating disk 3, thus limiting rotating disks 3 of different sizes. This ensures the sealing between different rotating disks 3 and the edge of the groove.

[0068] Specifically, the first housing 11 is provided with a wear-reducing disc, which is arranged along the edge of the arc-shaped groove. The wear-reducing disc is in close contact with the rotating disk 3. The wear-reducing disc is made of a material with high hardness. This reduces the wear on the edge of the groove, ensures the sealing performance between the edge of the groove and the rotating disk 3, and ultimately ensures the normal suction force of the suction hole 31.

[0069] In one embodiment, the rotating disk 3 is provided with a guide groove 32, and suction holes 31 are located in the guide groove 32. The number of guide grooves 32 and suction holes 31 are all one-to-one correspondences, and the multiple suction holes 31 and multiple guide grooves 32 are distributed at intervals along the circumference of the rotating disk 3. The multiple guide grooves 32 and multiple suction holes 31 can improve the sowing rate.

[0070] In one embodiment, a stirring wheel 8 is rotatably connected within the second cavity 123 and is located within the first region. The stirring wheel 8 has teeth that mesh with the sidewalls of each guide channel 32. The multiple guide channels 32 are spaced apart to form teeth that mesh with the stirring wheel 8. This ensures that when the rotating disk 3 rotates, the guide channels 32 drive the stirring wheel 8 to rotate, and the stirring wheel 8 stirs the seeds within the first region, preventing seeds from accumulating in any one guide channel 32 and ensuring a relatively uniform number of seeds within the guide channels 32. The stirring by the stirring wheel 8 also reduces the likelihood of seed heads being perpendicular to the rotating disk 3, reducing the likelihood of seed heads inserting into the suction holes 31, and improving the seed filling rate of the rotating disk 3.

[0071] In one embodiment, the device also includes a frame 9, with a support frame 6 fixedly connected to the frame 9. The frame 9 is used to protect the housing 1 and reduce the risk of damage to the housing 1 caused by collisions with external objects.

[0072] Specifically, a drive shaft is rotatably connected to the frame 9. The drive shaft is connected to the rotating shaft 33 via a universal joint. The drive shaft is also connected to the motor, which is fixedly mounted on the frame 9. The housing 1, support frame 6, and motor are integrated on the frame 9 to form a whole, which facilitates transportation and use.

[0073] The working process of this invention is as follows: After the seeds enter through the seed inlet 121, they enter the first area. As the motor drives the rotating shaft 33 to rotate the rotating disk 3, the stirring wheel 8 is also driven by the rotating disk 3 to rotate, which disperses the seeds near the seed inlet 121, allowing them to enter the other guide channels 32 smoothly and evenly. The rotation of the stirring wheel 8 also helps to clear any accumulation or blockage of the seeds. The seeds move along the guide channels 32 and enter the suction holes 31, which hold the sides of the seeds. As the rotating disk 3 rotates, the seeds that are not held by the suction holes 31 slide out of the guide channels 32 under the action of gravity and flow to the vicinity of the stirring wheel 8. The stirring wheel 8 then sends them into the other guide channels 32.

[0074] When the seeds adsorbed by suction hole 31 pass through the first seed cleaning structure 4, the user adjusts the distance between the seed cleaning component 42 and suction hole 31. When the number of seeds adsorbed by suction hole 31 exceeds the allowable throughput, the excess seeds will be blocked by the seed cleaning component 42 and cannot pass through, ensuring that the number of seeds passing through is the preset value. This ensures that the number of seeds discharged by the seed metering device is the same each time, ensuring a reasonable planting density.

[0075] The second seed cleaning structure 5 can also limit the number of seeds on the suction hole 31; by rotating the knob 51, the seed cleaning rod 52 can move closer to or further away from the suction hole 31 to adjust the distance between the seed cleaning rod 52 and the suction hole 31, thereby adjusting the number of seeds on the suction hole 31. Users can ensure that the number of seeds dispensed each time is the same by using the first seed cleaning structure 4 and the second seed cleaning structure 5 together.

[0076] In summary, the present invention provides a seed metering device, which uses an air extraction hole 112 to evacuate the first cavity 111, so that the suction hole 31 communicating with the first cavity 111 has suction force to adsorb seeds in the first area. When the suction hole 31 rotates to the second area 124 of the first area 125 and approaches the seed metering port 122, the suction force of the suction hole 31 disappears, and the seeds are discharged from the seed metering port 122.

[0077] The user rotates the drive component 43, which in turn drives the seed cleaning component 42 to rotate, causing the seed cleaning component 42 to move closer to or further away from the suction hole 31. This ensures that the closest distance between the seed cleaning component 42 and the suction hole 31 is limited to a predetermined number of seeds, guaranteeing that the suction hole 31 can only carry a predetermined number of seeds through the seed cleaning component 42. Typically, the suction hole 31 can only adsorb one seed at a time as it passes through the seed cleaning component 42. This seed metering device ensures that the number of seeds output each time is a uniform predetermined number, guaranteeing the planting density of the land and ensuring the yield of the plants in the later stages.

[0078] The above description is only a preferred embodiment of the present invention. 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 invention, and these improvements and substitutions should also be considered within the scope of protection of the present invention.

Claims

1. A seed metering device, characterized in that, include: The outer shell has a cavity; the outer shell is provided with a seed inlet, a seed outlet, and an air extraction hole. A rotating disk is rotatably disposed within the cavity, and the rotating disk divides the cavity into a first cavity and a second cavity; the rotating disk is sealed and fitted to the edge of the first cavity; The air extraction port is connected to the first cavity, and the air extraction port is used to connect to the negative pressure air pipe. A baffle is fixedly disposed in the second cavity and contacts the rotating disk; the baffle divides the second cavity into a first region and a second region; the seed inlet communicates with the first region and the seed outlet communicates with the second region. The rotating disk has suction holes, and the suction holes located in the first region are connected to the first cavity, while the suction holes located in the second region are disconnected from the first cavity. The first seed cleaning structure includes a plate fixedly connected to the outer shell, a seed cleaning component rotatably connected to the plate, and a driving component rotatably connected to the plate; the seed cleaning component is located in the first region; the driving component can drive the seed cleaning component to rotate. The driving component has an arc-shaped through hole, and the rotational connection between the driving component and the plate is spaced apart from the center of the arc-shaped through hole; the seed cleaning component is fixedly provided with a limiting pin, and the limiting pin is slidably inserted into the arc-shaped through hole; The plate body has multiple limiting holes, and the driving member has a limiting end for insertion into the limiting holes; the multiple limiting holes are distributed at intervals along the movement trajectory of the limiting end; The first seed cleaning structure further includes a limiting member spaced apart from the plate; the seed cleaning member is located between the plate and the limiting member; the limiting member is slidably connected to the plate; It also includes a second seed cleaning structure, which includes a knob and a seed cleaning rod; the knob is rotatably connected to the outer casing; one end of the seed cleaning rod is fixedly connected to the knob, and the other end of the seed cleaning rod is close to the suction hole, and the seed cleaning rod is located in the first area; the extension direction of the seed cleaning rod is spaced apart from the axis of the knob; It also includes a support frame and a rotating frame, the rotating frame being rotatably connected to the support frame, and the outer shell being fixedly connected to the rotating frame; The support frame has an arc-shaped limiting opening, and the rotating frame is fixed with a limiting rod for slidingly inserting into the limiting opening.

2. The seed meter of claim 1, wherein, The outer casing includes a first casing and a second casing, and the first casing and the second casing are detachably connected.

3. The seed metering device according to claim 1, characterized in that, The rotating disk is provided with a guide groove, and the suction hole is located in the guide groove. The number of the guide groove and the number of the suction hole are all one-to-one correspondences, and the multiple suction holes and the multiple guide grooves are distributed at intervals along the circumference of the rotating disk.

4. The seed metering device according to claim 3, characterized in that, It also includes a stirring wheel rotatably connected to the second cavity, the stirring wheel being located in the first region; the stirring wheel has teeth, and the teeth mesh with the sidewalls of each of the guide channels.

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