Composite seed-metering device

Abstract

The invention discloses a composite seed-metering device, which comprises: a housing having an installation space, a feed inlet arranged at the top of the installation space, an installation opening arranged at the side part of the installation space, aligned rotating holes arranged at the two opposite side walls of the installation space, and a blanking funnel arranged at the bottom of the housing and communicated with the installation space; the movable cover is movably mounted on one side, corresponding to the mounting opening, of the shell and has a mounting state for covering the mounting opening and an opening state for opening the mounting opening; the shaft core assembly is detachably installed on the shell and can rotate and move along the rotating hole, and the shaft core assembly comprises a roller core; the limiting structure is connected to the shell and used for limiting the movable cover in the installation state. Through the arrangement of the movable cover, the shaft core assembly can be quickly disassembled and replaced through the mounting opening, the whole seed-metering device does not need to be replaced, the time of replacement operation is greatly shortened, the labor intensity of replacement operation is greatly reduced, and the roller core can be quickly replaced to achieve seeding operation of different crops.

Description

Technical Field

[0001] The invention relates to the technical field of agricultural machinery, and in particular to a composite seed metering device. Background Art

[0002] In modern agricultural production, as an important agricultural machinery, the performance and applicability of the seeding device of the seeder play a key role in the efficiency and quality of the sowing operation. However, the existing seeding device of the seeder has many limitations in practical applications. On the one hand, the structure of the traditional seeding device is relatively fixed, and it is usually only applicable to the sowing of a few specific crops, and cannot meet the needs of diversified crop planting. For example, the shape and size of seeds of different crops vary greatly, and the seeding slot design of the existing seeding device can often only adapt to a single or a few seed types. On the other hand, when it is necessary to replace the sowing crop, the replacement process of the traditional seeding device is extremely cumbersome. Because its overall structure is not removable, it takes a lot of time and effort to replace the seeding device, which not only increases the labor intensity of the operators, but also seriously affects the continuity and efficiency of the sowing operation. This inconvenient operation problem is particularly prominent in actual agricultural production, especially in areas with multi-crop rotation or intercropping, where frequent replacement of the seeding device has become an important factor restricting the efficient operation of the seeder. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a composite seed metering device.

[0004] To achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0005] A composite seed metering device comprises: a shell having an installation space, a feeding port being provided at the top of the installation space, an installation opening being provided at the side of the installation space, aligned rotating holes being provided at two opposite side walls of the installation space, and a blanking funnel communicating with the installation space being provided at the bottom of the shell; a movable cover being movably mounted on a side of the shell corresponding to the installation opening, and having an installation state in which the installation opening is covered and an opening state in which the installation opening is opened; an axis core assembly being detachably mounted on the shell and rotatably movable along the rotating hole, and comprising a roller core, a peripheral wall of which is provided with a seed metering groove; the roller core can be disassembled and separated from the installation space from the installation opening; a limiting structure being connected to the shell and used for limiting the movable cover in the installation state, so that the movable cover is stably in the installation state.

[0006] Furthermore, the bottom of the movable cover is hinged to the bottom side of the installation opening of the shell; the limiting structure is a limiting protrusion arranged on the movable cover, and the limiting protrusion is located above the installation opening.

[0007] Furthermore, it also includes a baffle plate connected to the inner side of the movable cover. When installed, the baffle plate is located between the movable cover and the roller core to prevent seeds from falling from the baffle plate into the drop funnel.

[0008] Furthermore, a brush is installed on the shell, and the brush contacts the surface of the roller core; the brush and the material baffle plate are respectively located on both sides of the upper half of the roller core.

[0009] Furthermore, the material baffle plate is hinged to the movable cover, and the movable cover is provided with a top limit block located above the material baffle plate. A latch is laterally inserted into the movable cover, and the latch is located below the material baffle plate for supporting the material baffle plate so that the material baffle plate opens to block the seeds.

[0010] Furthermore, the outer peripheral wall of the roller core is provided with an annular groove, which is connected to the seeding groove; a seed cleaning knife is installed on the shell or the movable cover, and the seed cleaning knife is partially embedded in the annular groove to remove the seeds staying in the seeding groove.

[0011] Furthermore, the movable cover is provided with a mounting block, the mounting block is provided with a slot, the side wall of the slot is provided with a through hole, the seed cleaning knife is embedded in the slot and is provided with a mounting hole corresponding to the through hole, the mounting hole is aligned with the through hole and is installed with a fastener.

[0012] Furthermore, the shell includes two mounting plates, the mounting space is formed between the two mounting plates, and the rotating hole is arranged on the mounting plates on the corresponding side; the shaft core assembly also includes two connecting plates, the connecting plates include a plate body and a centering protrusion, the centering protrusion protrudes from the center of the plate body, the two plate bodies are both located in the mounting space, and the centering protrusions on the two plate bodies are respectively rotatably mounted on the rotating holes on both sides; the roller core can be removably embedded between the two connecting plates and can rotate with the two connecting plates; the overall contours of the two connecting plates and the roller core are smaller than the mounting opening so that they can be embedded in the mounting space from the mounting opening.

[0013] Furthermore, raised annular protrusions are provided on opposite sides of the two mounting plates, and notches are provided on the annular protrusions corresponding to the mounting openings. Positioning protrusions that can pass through the corresponding notches are provided on both sides of the roller core, and the positioning protrusions are fitted with the inner wall of the annular protrusions so as to be able to rotate along the inner wall of the annular protrusions; positioning grooves for the positioning protrusions to be embedded are provided on opposite sides of the two disk bodies; an embedding groove is provided at one end of the centering protrusion facing away from the disk body, and a transmission shaft is embedded in the embedding groove; an arc strip is provided on the inner side of the movable cover corresponding to the notch; when in the installed state, the arc strip is embedded in the notch, and the diameter of the inner wall of the arc strip is the same as the diameter of the inner wall of the annular protrusion and is concentrically arranged.

[0014] Furthermore, the back sides of the two mounting plates are provided with extended positioning cylinders arranged around the edge of the rotating hole; the peripheral wall of the centering protrusion extending the positioning cylinder is provided with a slot, and a retaining ring is embedded in the slot; an adjustment pad is sandwiched between the retaining ring and the centering protrusion.

[0015] The present invention has the following beneficial effects:

[0016] By designing a detachable shaft core assembly, the roller core of different specifications of seeding slots can be replaced to adapt to the shape and size of different crop seeds. The roller core can be quickly replaced to achieve sowing operations of different crops, thereby meeting the sowing needs of various crops. This modular design breaks through the limitation of the single applicability of traditional seeding devices and significantly improves the versatility and flexibility of seeding devices; the setting of the movable cover allows the shaft core assembly to be quickly disassembled and replaced through the installation opening without the need to replace the seeding device as a whole, greatly reducing the time and labor intensity of the replacement operation. The limiting structure can effectively limit the movable cover to ensure its stability when installed, thereby ensuring the smooth progress of the sowing operation.

[0017] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0019] Figure 1 is a schematic diagram of the overall structure of an embodiment of the present invention;

[0020] Figure 2 yes Figure 1 Schematic diagram of the decomposed state structure;

[0021] Figure 3 yes Figure 1 Schematic diagram of another decomposition state structure;

[0022] Figure 4 yes Figure 1 A partial schematic diagram of the decomposed state of a part of the structure;

[0023] Figure 5 is a cross-sectional view of the movable cover in an installed state;

[0024] Figure 6 is a cross-sectional view of the movable cover in an open state;

[0025] Figure 7 It is a schematic diagram of the overall structure of the movable cover;

[0026] Figure 8 yes Figure 7 Schematic diagram of the decomposed state structure;

[0027] Fig. 9 is a cross-sectional view of another embodiment of the present invention;

[0028] Fig.10 It is a schematic diagram of the structure of the composite seed metering device in series;

[0029] Fig.11 It is a structural schematic diagram of a roller core.

[0030] Legend:

[0031] Shell 100, installation space 110, feed port 111, installation opening 112, rotation hole 113, material drop funnel 120, brush 130, installation plate 140, extended positioning cylinder 141, annular protrusion 150, notch 151, air flow channel 160, fan 161;

[0032] The movable cover 200, the top limiting block 210, the latch 220, the mounting block 230, the slot 231, the through hole 232, and the arc strip 240;

[0033] Axle core assembly 300, roller core 310, seed discharging groove 311, annular groove 312, positioning protrusion 313, connecting plate 320, plate body 321, centering protrusion 322, positioning groove 323, clamping groove 324, retaining ring 325, embedded groove 326, transmission shaft 330, sink groove 331, adjustment pad 340;

[0034] Limiting structure 400;

[0035] Baffle plate 500;

[0036] Seed cleaning knife 600, mounting hole 610;

[0037] Tandem cylinder 700. DETAILED DESCRIPTION

[0038] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0041] In addition, the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0042] Please refer to Figure 1 and Figure 2 A composite seed metering device in a preferred embodiment of the present invention includes a housing 100, a movable cover 200, an axis core assembly 300 and a limiting structure 400.

[0043] The housing 100 has an installation space 110, a material inlet 111 is provided at the top of the installation space 110, and a discharge plate is slidably installed at the material inlet 111. A mounting opening 112 is provided at the side of the installation space 110, and aligned rotating holes 113 are provided on two opposite side walls of the installation space 110. A material drop funnel 120 connected to the installation space 110 is provided at the bottom of the housing 100.

[0044] The movable cover 200 is movably mounted on a side of the housing 100 corresponding to the mounting opening 112 . The movable cover 200 has an installed state covering the mounting opening 112 and an opened state opening the mounting opening 112 . The movable cover 200 is movably mounted on the housing 100 to achieve state switching.

[0045] The shaft core assembly 300 can be detachably mounted on the housing 100 and can rotate along the rotating hole 113. The shaft core assembly 300 includes a roller core 310, and a seeding groove 311 is provided on the peripheral wall of the roller core 310; the roller core 310 can be detached from the installation space 110 from the installation opening 112. It can be understood that the housing 100 will be fixedly mounted on the frame of the seed drill, and a rotation drive mechanism will be provided on the frame to drive the shaft core assembly 300 to rotate to achieve seeding.

[0046] The limiting structure 400 is connected to the housing 100 , and is used to limit the movable cover 200 in the installed state, so that the movable cover 200 is stably in the installed state.

[0047] In a preferred embodiment of the present invention, a composite seed metering device is designed with a detachable shaft core assembly 300, and can adapt to the shapes and sizes of different crop seeds by replacing the roller core 310 of the seeding slot 311 of different specifications, and can quickly replace the roller core to achieve the sowing operation of different crops, thereby meeting the sowing needs of various crops. Figure 2 As shown, the roller core 310 is used to adapt to the sowing of rapeseed seeds, such as Fig.11 As shown, the roller core 310 is used to adapt to the sowing of corn seeds. Of course, it can also realize the sowing of other crops as needed, such as sorghum, wheat, soybeans and other crops. This modular design breaks through the limitation of the single applicability of the traditional seeding device and significantly improves the versatility and flexibility of the seeding device; the setting of the movable cover 200 allows the shaft core assembly 300 to be quickly disassembled and replaced through the installation opening 112, without the need to replace the seeding device as a whole, which greatly reduces the time and labor intensity of the replacement operation. The limiting structure 400 can effectively limit the movable cover 200 to ensure its stability when it is installed, thereby ensuring the smooth progress of the sowing operation. By adjusting the rotation speed of the roller core 310, the sowing density can be flexibly controlled to meet the planting requirements of different crops.

[0048] Reference Figure 3 In some embodiments of the present invention, the bottom of the movable cover 200 is hinged to the bottom side of the installation opening 112 of the housing 100; the limiting structure 400 is a limiting protrusion provided on the movable cover 200, the limiting protrusion is located above the installation opening 112, and the limiting protrusion is used to limit the top of the movable cover 200 in the installed state so that it cannot move toward the open state. The convex surface of the limiting protrusion is an arc surface, so that when closing and opening, the movable cover 200 can be guided to gradually deform to pass over the limiting protrusion. The bottom of the movable cover 200 is hinged, and when it is opened or closed by force and contacts the limiting protrusion, the top of the movable cover 200 can be slightly deformed to pass over the limiting protrusion, so as to be successfully opened or closed.

[0049] Reference Figure 7 In some embodiments of the present invention, a baffle plate 500 is further included, which is connected to the inner side of the movable cover 200. When installed, the baffle plate 500 is located between the movable cover 200 and the roller core 310 to prevent seeds from falling from the baffle plate 500 into the drop hopper 120. The seeds can only be discharged by being inserted into the seed discharging groove 311 and rotating.

[0050] Reference Figure 5 and Fig. 9In a further embodiment of the present invention, a brush 130 is installed on the housing 100, and the brush 130 contacts the surface of the roller core 310; the brush 130 is arranged on a substrate, and the substrate is fixedly installed on the housing 100. The brush 130 and the baffle plate 500 are respectively located on both sides of the upper half of the roller core 310. Specifically, in this embodiment, the baffle plate 500 is located on the right side of the upper half of the roller core 310, and the brush 130 is located on the left side of the upper half of the roller core 310. When the roller core 310 rotates counterclockwise, the baffle plate 500 prevents the material from falling from the right side of the roller core 310 to the material drop hopper 120. The roller core 310 rotates counterclockwise to drive the seeds in the seeding slot 311 to rotate toward the brush 130 until they fall out of the seeding slot 311 due to their own gravity and fall into the material drop hopper 120 to achieve material discharge. The brush 130 blocks the seeds adhering to the roller core 310 except the seed discharging groove 311, and brushes the seeds away from the roller core 310, so as to prevent the excess seeds from adhering to other positions of the roller core 310 and discharging the seeds, resulting in uncontrollable seed discharging quantity.

[0051] Reference Fig. 9 In a further embodiment of the present invention, the baffle plate 500 is hinged to the movable cover 200, and the movable cover 200 is provided with a top stopper 210 located above the baffle plate 500. A bayonet 220 is inserted transversely on the movable cover 200, and the bayonet 220 is located below the baffle plate 500, and is used to support the baffle plate 500, so that the baffle plate 500 is opened to block the seeds. When the baffle plate 500 is opened, one end of the baffle plate 500 is adjacent to the peripheral wall of the roller core 310 to achieve effective blocking of the seeds. The circumferential limit of the baffle plate 500 is achieved by the top stopper 210 and the bayonet 220, so that the baffle plate 500 is in a stable position when blocking the material. When it is necessary to discharge all the seeds, the bayonet 220 can be removed, so that the baffle plate 500 rotates downward under the action of gravity to release the blocking of the seeds, so that the seeds on this side can be discharged completely.

[0052] Reference Figure 2 In a further embodiment of the present invention, an annular groove 312 is provided on the outer peripheral wall of the roller core 310, and the annular groove 312 is connected to the seeding groove 311; a seed cleaning knife 600 is installed on the housing 100 or the movable cover 200, and the seed cleaning knife 600 is partially embedded in the annular groove 312 to remove the seeds staying in the seeding groove 311. The seed cleaning knife 600 is located at the lower half of the roller core 310 and is embedded in the annular groove 312 of the lower half of the roller core 310. The seeding grooves 311 are arranged in a circumferential arrangement, and one annular groove 312 connects the seeding grooves 311 on the same circumferential arrangement in series. When the seeds are stuck in the seeding groove 311 and do not fall due to gravity, the seed cleaning knife 600 can remove the seeds staying in the seeding groove 311 to achieve smooth seeding.

[0053] Reference Figure 7 and Figure 8In a further embodiment of the present invention, a mounting block 230 is provided on the movable cover 200, a slot 231 is provided on the mounting block 230, a through-hole 232 is provided on the side wall of the slot 231, the seed cleaning knife 600 is embedded in the slot 231 and is provided with a mounting hole 610 corresponding to the through-hole 232, the mounting hole 610 is aligned with the through-hole 232 and is installed with a fastener, which is a positioning pin, and the positioning and fixing installation of the seed cleaning knife 600 is achieved by aligning the slot 231 with the hole position, thereby ensuring the installation accuracy of the seed cleaning knife 600.

[0054] Reference Figure 2 , Figure 3 and Figure 4 In a further embodiment of the present invention, the housing 100 includes two mounting plates 140, the mounting space 110 is formed between the two mounting plates 140, and the rotation hole 113 is provided on the mounting plate 140 on the corresponding side; it can be understood that a connecting plate is provided on the side of the mounting space 110 facing away from the mounting opening 112 to connect the two mounting plates 140 and close the side. When the roller core 310 needs to be disassembled and replaced, the movable cover 200 can be switched to the open state.

[0055] The shaft core assembly 300 further includes two connecting disks 320, the connecting disks 320 include a disk body 321 and a centering protrusion 322, the centering protrusion 322 protrudes from the center of the disk body 321, the two disk bodies 321 are both located in the installation space 110, and the centering protrusions 322 on the two disk bodies 321 are respectively rotatably mounted on the rotating holes 113 on both sides, thereby realizing the rotatable installation. That is, the centering protrusion 322 on the front disk body protrudes forward and is rotatably mounted on the rotating hole 113 on the front mounting plate 140, and the centering protrusion 322 on the rear disk body protrudes backward and is rotatably mounted on the rotating hole 113 on the rear mounting plate 140.

[0056] The roller core 310 can be removably embedded between the two connection disks 320 and can rotate with the two connection disks 320; the overall profiles of the two connection disks 320 and the roller core 310 are smaller than the installation opening 112 so that they can be embedded in the installation space 110 from the installation opening 112. During installation, the two connection disks 320 enter the installation space 110 from the installation opening 112 in turn, and the centering protrusion 322 is embedded in the rotation hole 113, and then the roller core 310 enters the installation space 110 from the installation opening 112 and is embedded between the two connection disks 320. For disassembly, the reverse operation can be performed. Installation and disassembly do not require disassembly of the installation shell 100, and disassembly is simple and convenient. By providing two connecting plates 320 and a detachable roller core 310, the installation and removal of the roller core 310 are more convenient, which significantly improves the work efficiency; the roller core 310 of the seeding slot 311 of corresponding specifications can be adjusted or replaced according to different seed types and sowing requirements, which greatly improves the versatility and flexibility of the seed meter; when the roller core 310 is damaged or stuck, the roller core 310 can be quickly replaced without replacing the entire seed meter, which reduces the maintenance cost and time.

[0057] In a further embodiment of the present invention, a raised annular protrusion 150 is provided on the opposite sides of the two mounting plates 140, and the annular protrusion 150 is provided with a notch 151 corresponding to the mounting opening 112, and positioning protrusions 313 that can pass through the corresponding notch 151 are provided on both sides of the roller core 310, and the positioning protrusion 313 fits with the inner wall of the annular protrusion 150 so as to be able to rotate along the inner wall of the annular protrusion 150; in order to make the roller core 310 and the annular protrusion 150 cooperate stably and make the roller core 310 rotate in a balanced manner, a plurality of positioning protrusions 313 are evenly arranged around, so as to ensure that there is always a positioning protrusion 313 that fits with the inner wall of the annular protrusion 150 to ensure radial positioning. It can be understood that the inner wall of the annular protrusion 150 is a cylindrical surface, and the positioning protrusion 313 is a corresponding matching arc strip, so as to achieve rotational positioning. It is understandable that the thickness of the roller core 310 except the location of the positioning protrusion 313 is smaller than the spacing between the annular protrusions 150 on both sides, so that when installed, the roller core 310 can pass between the annular protrusions 150 on both sides. An arc strip 240 is provided on the inner side of the movable cover 200 corresponding to the notch 151; when installed, the arc strip 240 is embedded in the notch 151, and the diameter of the inner wall of the arc strip 240 is the same as the inner wall diameter of the annular protrusion 150 and is concentrically arranged. The arc strip 240 is embedded in the notch 151 to achieve complete positioning of the positioning protrusion 313 and prevent the positioning protrusion 313 from shaking in the notch 151. Positioning grooves 323 for the positioning protrusion 313 to be embedded are provided on the opposite sides of the two disk bodies 321; thereby, the positioning protrusion 313 is embedded in the positioning groove 323 to achieve torque transmission between the disk body 321 and the roller core 310, so that the roller core 310 can rotate synchronously with the disk body 321. It is also understood that when the disk body 321 is installed, it is embedded in the groove formed by the annular protrusion 150 to reduce the interference of the installed disk body 321 with the installation of another disk body 321. It is also understood that the axial dimension of the integral connection disk 320 is smaller than the spacing between the annular protrusions 150 on both sides, so that it can pass through the spacing between the annular protrusions 150 on both sides during installation to achieve installation. The end of the centering protrusion 322 facing away from the disk body 321 is provided with an embedding groove 326, and the embedding groove 326 is embedded with a transmission shaft 330; the transmission shaft 330 is embedded in the embedding groove 326 to transmit power, thereby realizing the positioning and installation of the transmission shaft 330 and the connection disk 320. The cross-sectional profiles of the transmission shaft 330 and the embedding groove 326 are regular polygons, so that power transmission can be directly realized, and torque transmission does not need to be realized through an additional connecting key, which makes installation more convenient. A recessed groove 331 is provided at the center of the end face of the transmission shaft 330 away from the centering protrusion. The bottom of the recessed groove 331 and the bottom of the embedded groove 326 are provided with corresponding holes for connection and fixing by screws. The recessed groove 331 can hide the screws, which is convenient for structural interference when the transmission shaft 330 is connected in series later. Fig.10 As shown, when two seed metering devices are connected in series, they can be connected in series through a series connection tube 700 on the transmission shafts 330 on opposite sides of the two devices. The center of the series connection tube 700 is provided with a center hole for the transmission shaft 330 to fit in and embed to achieve torque transmission.

[0058] In a further embodiment of the present invention, the back side of the two mounting plates 140 is provided with an extended positioning cylinder 141 arranged around the edge of the rotating hole 113; so that it has sufficient length to be positioned and matched with the centering protrusion 322, so that the centering protrusion 322 can rotate more stably. The peripheral wall of the centering protrusion 322 protruding from the extended positioning cylinder 141 is provided with a clamping groove 324, and the clamping groove 324 is embedded with a retaining ring 325, so as to axially limit the centering protrusion 322 and realize the axial positioning of the connecting plate 320. An adjustment pad 340 is sandwiched between the retaining ring 325 and the centering protrusion 322, so as to eliminate the installation gap. The adjustment pad 340 of corresponding thickness can be selected according to the actual installation gap.

[0059] Reference Figure 6 In some embodiments of the present invention, the shell 100 is provided with an airflow channel 160 on one side of the bottom of the installation space, the bottom of the airflow channel 160 is connected to the upper end of the blanking funnel 120, and a fan 161 is provided on the top of the airflow channel 160 to supply air to the blanking funnel 120 to achieve fast and smooth seeding and blanking.

[0060] Of course, in some other embodiments of the present invention, such as Figure 7 As shown, the air flow channel 160 and the fan 161 may not be provided to assist seeding, thereby reducing equipment costs.

[0061] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A composite seed metering device, characterized in that: include: A housing (100) has an installation space (110), a material inlet (111) is provided at the top of the installation space (110), an installation opening (112) is provided at the side of the installation space (110), two opposite side walls of the installation space (110) are provided with aligned rotating holes (113), and a material drop funnel (120) connected to the installation space (110) is provided at the bottom of the housing (100); A movable cover (200) is movably mounted on a side of the housing (100) corresponding to the mounting opening (112), and has a mounted state in which the mounting opening (112) is covered and an open state in which the mounting opening (112) is opened; The shaft core assembly (300) is detachably mounted on the housing (100) and can rotate along the rotating hole (113), comprising a roller core (310), wherein a seed discharging groove (311) is provided on the peripheral wall of the roller core (310); the roller core (310) can be detached from the installation space (110) through the installation opening (112); The limiting structure (400) is connected to the housing (100) and is used to limit the movable cover (200) in the installed state, so that the movable cover (200) is stably in the installed state.

2. The composite seed metering device according to claim 1, characterized in that: The bottom of the movable cover (200) is hinged to the bottom side of the installation opening (112) of the shell (100); the limiting structure (400) is a limiting protrusion provided on the movable cover (200), and the limiting protrusion is located above the installation opening (112).

3. The composite seed metering device according to claim 1, characterized in that: It also includes a material blocking plate (500) connected to the inner side of the movable cover (200). When in the installed state, the material blocking plate (500) is located between the movable cover (200) and the roller core (310) to block seeds from falling from the material blocking plate (500) into the material dropping funnel (120).

4. The composite seed metering device according to claim 3, characterized in that: A brush (130) is installed on the shell (100), and the brush (130) is in contact with the surface of the roller core (310); the brush (130) and the material blocking plate (500) are respectively located on both sides of the upper half of the roller core (310).

5. The composite seed metering device according to claim 3, characterized in that: The material blocking plate (500) is hinged to the movable cover (200), and the movable cover (200) is provided with a top limit block (210) located above the material blocking plate (500). A latch (220) is inserted transversely on the movable cover (200), and the latch (220) is located below the material blocking plate (500) and is used to support the material blocking plate (500) so that the material blocking plate (500) is opened to block the seeds.

6. The composite seed metering device according to claim 1, characterized in that: The outer peripheral wall of the roller core (310) is provided with an annular groove (312), and the annular groove (312) is communicated with the seed discharging groove (311); a seed cleaning knife (600) is installed on the housing (100) or the movable cover (200), and the seed cleaning knife (600) is partially embedded in the annular groove (312) to remove seeds remaining in the seed discharging groove (311).

7. The composite seed metering device according to claim 6, characterized in that: The movable cover (200) is provided with a mounting block (230), the mounting block (230) is provided with a slot (231), a side wall of the slot (231) is provided with a through hole (232), the seed cleaning knife (600) is embedded in the slot (231) and is provided with a mounting hole (610) corresponding to the through hole (232), the mounting hole (610) is aligned with the through hole (232) and is installed with a fastener.

8. The composite seed metering device according to claim 1, characterized in that: The housing (100) comprises two mounting plates (140), the mounting space (110) is formed between the two mounting plates (140), and the rotating hole (113) is provided on the mounting plates (140) at corresponding sides; The shaft core assembly (300) further comprises two connecting disks (320), wherein the connecting disks (320) comprise a disk body (321) and a centering protrusion (322), wherein the centering protrusion (322) protrudes from the center of the disk body (321), and the two disk bodies (321) are both located in the installation space (110), and the centering protrusions (322) on the two disk bodies (321) are respectively rotatably installed on the rotating holes (113) on both sides; The roller core (310) is detachably embedded between the two connecting disks (320) and can rotate along with the two connecting disks (320); The overall profiles of the two connecting plates (320) and the roller core (310) are smaller than the installation opening (112) so that they can be embedded into the installation space (110) through the installation opening (112).

9. The composite seed metering device according to claim 8, characterized in that: The two mounting plates (140) are provided with a raised annular protrusion (150) on opposite sides, the annular protrusion (150) is provided with a notch (151) corresponding to the mounting opening (112), and the roller core (310) is provided with a positioning protrusion (313) on both sides that can pass through the corresponding notch (151), and the positioning protrusion (313) is in contact with the inner wall of the annular protrusion (150) so as to be able to rotate along the inner wall of the annular protrusion (150); the two disk bodies (321) are provided with a positioning protrusion (313) on opposite sides. The movable cover (200) is provided with an arc strip (240) on the inner side corresponding to the notch (151); when in the installed state, the arc strip (240) is embedded in the notch (151), and the diameter of the inner wall of the arc strip (240) is the same as the diameter of the inner wall of the annular protrusion (150) and is concentrically arranged.

10. The composite seed metering device according to claim 9, characterized in that: An extended positioning cylinder (141) is arranged around the edge of the rotating hole (113) on the back side of the two mounting plates (140); a peripheral wall of the centering protrusion (322) protruding from the extended positioning cylinder (141) is provided with a clamping groove (324), and a retaining ring (325) is embedded in the clamping groove (324); an adjustment pad (340) is sandwiched between the retaining ring (325) and the centering protrusion (322).

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