A horizontal disc type precision seed metering device suitable for hillside

Abstract

The application discloses a horizontal disc type precision seed sowing device suitable for slope land; wherein a bevel gear reversing box is fixed below a bottom disc, an upper shell is fixed above the bottom disc, and the bottom disc is fixed with a rack; a sowing opening is formed in the bottom disc, and the sowing opening is located directly below a seed pushing mechanism; one end of a first seed cleaning brush fixing beam, a second seed cleaning brush fixing beam and a third seed cleaning brush fixing beam is fixed above an inner wall of the upper shell, and the other end is fixed above an outer surface of a circular table; a seed pushing mechanism positioning hole is arranged on a circular table outer protrusion; a seed box guide tube, the first seed cleaning brush fixing beam, the second seed cleaning brush fixing beam, the third seed cleaning brush fixing beam and the seed pushing mechanism positioning hole are sequentially arranged along a circumferential direction, and the arrangement sequence is the same as a rotation direction of a seed sowing disc. The three independent seed cleaning brush composed of the third seed cleaning mechanism can complete the seed cleaning task while reducing the density of the seed flow, and the seed pushing mechanism can forcibly push the seed out of the sowing opening to complete the sowing.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of strip seeding machine, and particularly relates to a horizontal disc type precision seed metering device suitable for slope land. BACKGROUND

[0002] Soybean is one of important food crops in China, and is an important agricultural crop integrating food, feed and processing, and is widely planted in China. Corn is also one of important food crops, has wide planting area, large yield and high economic benefit, and has an important strategic position in guaranteeing food safety. In recent years, China vigorously promotes corn-soybean compound planting, aiming to improve corn yield in China and solve problems such as low production level of domestic soybean, strong dependence on import and great difficulty in import. In order to comprehensively improve the overall level of agricultural mechanization in China, it is urgent to solve the problems of low mechanization rate of corn-soybean planting in hilly and mountainous areas such as southwest, Huang-Huai-Hai and the like, and to create a precision efficient, low energy consumption, anti-vibration and low-leakage seed metering device. However, the hilly and mountainous areas in China have the characteristics of small and scattered plots, large soil clumps, heavy soil, and uneven terrain, and the existing seed metering devices have poor adaptability, single form and complex structure, and cannot meet the requirements of slope seeding. At present, the seed metering devices commonly used in China mainly include pneumatic type and mechanical type. The pneumatic seed metering device is expensive, and the overall weight is large due to the need to carry a fan, so it is not suitable for light operation of small plots in hilly and mountainous areas. The mechanical seed metering device mainly includes vertical disc type and horizontal disc type. The vertical disc type seed metering device needs to overcome gravity work to be lifted to a certain height to complete seed metering when working on rugged terrain, and the body of the seeding machine will vibrate violently when working on the land, which causes the seed to be shaken off and separated from the type hole during carrying, resulting in missing seeding and reducing the qualified index. Therefore, in view of the above problems, a horizontal disc type precision seed metering device suitable for slope land is designed, which meets the agronomic requirements of corn-soybean planting on slope land and realizes efficient precision seeding of corn-soybean. SUMMARY

[0003] Aiming at the problems of large weight and complex structure of the pneumatic seed metering device and the seed missing and missing planting caused by the machine vibration and the seed overcoming gravity in the working process of the vertical disc seed metering device, a horizontal disc type precision seed metering device suitable for slope land is designed, a double-circle type hole type soybean seed metering disc and a single-circle groove type corn seed metering disc are designed, and the adaptive seeding of soybean and corn seeds is realized by replacing the seed metering disc, the three-stage seed cleaning mechanism composed of independent seed cleaning brushes can complete the seed cleaning task while reducing the density of the seed flow, and the seed pushing mechanism can forcibly push the seeds out of the seed throwing port to complete the seeding, and the technical scheme comprises a seed box, a first inclined seed cleaning brush, a second inclined seed cleaning brush, a third upright seed cleaning brush, an upper shell, a shaft fixing pin, a seed pushing mechanism, a seed metering disc, a bottom disc and a bevel gear reversing box; wherein the bevel gear reversing box is fixed below the bottom disc, the upper shell is fixed above the bottom disc, and the bottom disc is fixed with the rack; the bottom disc is provided with a seed throwing port, and the position of the seed throwing port is located directly below the seed pushing mechanism;

[0004] The central part of the upper shell is a hollow circular table structure, one end of the first, second and third seed cleaning brush fixing beams is fixed above the inner wall of the upper shell, and the other end is fixed above the outer surface of the hollow circular table, the seed pushing mechanism positioning hole is arranged on the outer connecting boss of the hollow circular table, and the seed box seed guiding pipe, the first, second and third seed cleaning brush fixing beams and the seed pushing mechanism positioning hole are sequentially arranged along the circumference, and the arrangement sequence is the same as the rotation direction of the seed metering disc; the first, second and third seed cleaning brush fixing beams are respectively provided with first, second and third seed cleaning brush clamping grooves; the first brush strip is fixed with the first inclined brush outer shell as the first seed cleaning brush, the second brush strip is fixed with the second inclined brush outer shell as the second seed cleaning brush, and the third brush strip is fixed with the third upright brush outer shell as the third seed cleaning brush; the first, second and third seed cleaning brushes are fixed in the first, second and third seed cleaning brush clamping grooves respectively; the first and second brush strips in the first and second seed cleaning brushes are inclined to the seed throwing direction when the seed metering disc rotates; the third brush strip in the third seed cleaning brush is perpendicular to the seed metering disc;

[0005] The main transmission shaft of the bevel gear reversing box is fixed in the center of the seed metering disc and rotates together; the seed metering disc comprises a disc surface and a type hole, wherein a plurality of type holes penetrating the disc surface are uniformly arranged in a circle on the disc surface.

[0006] The type hole has a shape slightly larger than the vertical projection shape of the seed in a side-up state,

[0007] The type hole includes a seed containing space communicated with the lower end surface of the disc surface and a seed blocking upper edge communicated with the upper end surface of the disc surface, the upper seed blocking upper edge can effectively prevent the seed from sliding out of the type hole due to vibration or inclination of the seed disc, the lower seed containing space can adapt to the seed to adjust the posture inside the type hole and smoothly seed, and the seed blocking upper edge and the upper end surface are provided with an auxiliary seed filling chamfer.

[0008] The seed pushing mechanism is composed of a seed pushing rod, a seed pushing rod fixing plate, a spring, a seed pushing wheel, a protrusion and a seed pushing wheel mounting rod; the positioning hole on the seed pushing rod fixing plate and the seed pushing mechanism positioning hole on the upper shell are fixed by bolt connection, the root of the seed pushing rod is hinged to the seed pushing rod fixing plate, one end of the spring is fixed to the spring positioning boss of the upper shell, the other end of the spring is fixed to the seed pushing rod, and the seed pushing rod can be reset after rotating around the root caused by seed pushing, thereby ensuring the seed pushing operation of the next protrusion; the seed pushing wheel mounting rod is fixed on the seed pushing rod, the active direction of the seed pushing wheel mounting rod and the seed pushing rod is perpendicular, and the seed pushing wheel is rotatably mounted on the seed pushing wheel mounting rod;

[0009] The outer periphery of the seed pushing wheel is uniformly provided with protrusions for seed pushing, and the seed blocking upper edge of the type hole pushes the protrusion away from the meshing side after each protrusion performs seed pushing operation on the seed in the type hole.

[0010] The brush strips in the three-stage seed cleaning brush contact the seed metering disc, and the brush strips in the first-stage and second-stage seed cleaning brushes are bent due to the lower acute angle formed by the inclination after being pressed after contacting the soybean seed metering disc, and the brush strips in the first-stage and second-stage seed cleaning brushes extend into the seed containing space to clean the excess seeds when the type hole rotates to the first-stage and second-stage seed cleaning brush positions.

[0011] The type hole is circular in plan view.

[0012] The type hole is used to fill soybean seeds, the diameter of the type hole is 11 cm, the height of the seed containing space is 6.1 mm, and the thickness of the seed blocking upper edge is 0.1 mm to 1.5 mm.

[0013] The type hole is a slot hole in plan view.

[0014] The type hole is used to fill corn seeds, the length of the seed containing space is 13.5 mm, the height of the seed containing space is 7 mm, and the thickness of the seed blocking upper edge is 0.1 mm to 1.5 mm.

[0015] The hexagonal shaft in the seed sowing disc is inserted into the hexagonal shaft sleeve on the main shaft sleeve, the main shaft sleeve is inserted into the main transmission shaft of the bevel gear reversing box; the cylindrical boss on the main shaft sleeve is inserted into the shaft sleeve positioning hole in the seed sowing disc from below, the main transmission shaft and the main shaft sleeve are in interference fit, and the shaft fixing pin is sequentially inserted into the pin hole on the main shaft sleeve and the main rotating shaft positioning hole, so that the main shaft sleeve, the main transmission shaft and the seed sowing disc are fixed; the positioning hole on the annular boss on the lower end surface of the upper shell is connected and fixed with the positioning hole on the annular boss of the bottom plate through bolts, and the bottom plate is fixed on the rack through the rack fixing boss.

[0016] When the original seed sowing disc needs to be replaced by another seed sowing disc,

[0017] First, the shaft fixing pin is pulled out, the main shaft sleeve is removed from the main transmission shaft, the original seed sowing disc is replaced by another seed sowing disc, and then the main shaft sleeve and the shaft fixing pin are installed, and the original seed pushing mechanism on the upper shell is removed and replaced by another seed pushing mechanism, the number of seed pushing wheels in the other seed pushing mechanism is equal to the number of the rings of the type holes in the other seed sowing disc.

[0018] The beneficial effects of the present application are:

[0019] 1. A compact double-ring type hole soybean seed sowing disc is designed, the inner and outer rings of the type holes are staggered and have the same rotation frequency and period, and the disc can discharge 40 soybean seeds per rotation, meeting the agronomic requirements of high-density precision seeding of soybean in hilly and mountainous areas.

[0020] 2. An inner blocking type anti-vibration type hole is designed for the soybean seed sowing disc, an auxiliary filling chamfer is arranged on the outside of the type hole, so that the soybean seeds can be smoothly filled into the type hole under the double action of gravity and friction of the disc, and a seed blocking upper edge is arranged on the inner upper small end face of the type hole, which can effectively block the seeds from sliding out of the type hole due to vibration or inclination of the disc, and the lower large end face can adapt to the posture adjustment of the seeds in the type hole and smoothly discharge the seeds.

[0021] 3. A single-ring slot type corn seed sowing disc is designed, the design of the upper end face as a slot and the lower end face as a circle can reduce the change of the posture of the seeds in the type hole during filling and prevent the seeds from sliding out of the type hole due to vibration, and the disc can discharge 26 corn seeds per rotation, meeting the corn seeding row spacing requirements and realizing precision seeding of corn.

[0022] 4. A three-stage seed cleaning mechanism combined with inclined brushes and upright brushes is designed, the high-density seed flow passes through the three-stage seed cleaning brushes under the driving of the disc, the next stage of seed cleaning brushes can clean the seeds that are not cleaned by the previous stage, effectively avoiding the remaining seeds in the type hole, realizing the step-by-step reduction of the density of the seed flow, avoiding the damage of the seeds caused by long-time accumulation and collision, and reducing the impact and collision of the seeds during the seed cleaning process by using brushes.

[0023] 5. The design of the detachable independent seed cleaning component, the seed cleaning brush monomer is inserted into the clamping groove of the specific position of the upper shell of the seed metering device when installed, and the handle on the monomer can be easily separated from the upper shell when removed, so that the quick adaptation and replacement of the seed cleaning component are realized. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is an exploded view of the seed metering device structure of the horizontal disc type precision seed metering device suitable for slope land according to the present application embodiment 1.

[0025] Figure 2 It is a top view of the overall structure of the present application embodiment 1.

[0026] Figure 3 It is a sectional view in A-A section. Figure 2 It is a sectional view in B-B section.

[0027] Figure 4 It is a top view of the seed box in the present application embodiment 1.

[0028] Figure 5 It is a side view of the first-stage seed cleaning brush in the present application embodiment 1.

[0029] Figure 6 It is a side view of the second-stage seed cleaning brush in the present application embodiment 1.

[0030] Figure 7 It is a side view of the third-stage seed cleaning brush in the present application embodiment 1.

[0031] Figure 8 It is a side view of the upper shell in the present application embodiment 1.

[0032] Figure 9 It is a front view of the main shaft sleeve in the present application embodiment 1.

[0033] Figure 10 It is an axonometric view of the soybean seed pushing mechanism in the present application embodiment 1.

[0034] Figure 11 It is a top view of the soybean seed metering disc in the present application embodiment 1.

[0035] Figure 12 It is a sectional view in B-B section. Figure 11

[0036] It is a bottom view of the bottom plate in the present application embodiment 1. Figure 13

[0037] It is a front view of the bevel gear reversing box in the present application embodiment 1. Figure 14

[0038] Figure 15 ​The working schematic diagram of the brush cleaning soybean seeds in the embodiment 1 of the present application;

[0039] Figure 16 The top view of the corn seed metering disc in the embodiment 2 of the present application;

[0040] Figure 17 The axonometric view of the corn seed pushing mechanism in the embodiment 2 of the present application;

[0041] Figure 18 The working schematic diagram of the brush cleaning corn seeds in the embodiment 2 of the present application;

[0042] In the figure:

[0043] 1 box 101 lower end face trapezoidal boss

[0044] 2 primary seed cleaning brush 201 brush bar

[0045] 202 primary inclined brush outer shell

[0046] 3 secondary seed cleaning brush 301 brush bar

[0047] 302 secondary inclined brush outer shell

[0048] 4 tertiary seed cleaning brush 401 brush bar

[0049] 402 tertiary upright brush outer shell

[0050] 5 upper shell 501 upper end face trapezoidal boss

[0051] 502 primary seed cleaning brush clamping groove 503 secondary seed cleaning brush clamping groove

[0052] 504 tertiary seed cleaning brush clamping groove 505 seed pushing mechanism positioning hole

[0053] 506 spring positioning boss 507 lower end face annular boss

[0054] 6 shaft fixing pin

[0055] 7 main shaft sleeve 701 hexagonal shaft

[0056] 702 cylindrical boss 703 pin hole

[0057] 8 soybean seed pushing mechanism 801 seed pushing rod

[0058] 802 seed pushing rod fixing plate 803 spring

[0059] 804 outer ring seed pushing wheel 805 inner ring seed pushing wheel

[0060] 806 protrusion 807 seed pushing wheel mounting rod

[0061] 9 seed metering disc 901 hexagonal shaft hole

[0062] 902 bushing positioning hole, 903 type hole

[0063] 904, 9031, market space.

[0064] 9032 upper edge of the seed block; 9033 auxiliary filling chamfer.

[0065] 10 Chassis 1001 Circular Boss

[0066] 1002 Frame fixing boss; 1003 Seed inlet

[0067] 11 Bevel Gear Reversing Box 1101 Main Drive Shaft

[0068] 1102 Power input shaft, 1103 Positioning through hole

[0069] 1104 Main Rotary Shaft Positioning Hole

[0070] 12 corn seed metering trays, 1201 corn-shaped holes

[0071] 13. Corn planting agencies Detailed Implementation

[0072] The present invention will be further described in detail below with reference to the accompanying drawings.

[0073] like Figures 1 to 15 The embodiment 1 of the present invention shown includes: a seed box 1, a primary inclined seed cleaning brush 2, a secondary inclined seed cleaning brush 3, a tertiary upright seed cleaning brush 4, an upper housing 5, a shaft fixing pin 6, a main shaft sleeve 7, a seed pushing mechanism 8, a seed dispensing disc 9, a chassis 10, and a bevel gear reversing box 11; wherein the positioning through hole 1103 on the bevel gear reversing box 11 is fixed to the positioning hole at the bottom of the chassis 10 by bolts, thus fixing the bevel gear reversing box below the chassis, and the main shaft sleeve 7 is inserted into the main drive shaft 1101 of the bevel gear reversing box 11. Simultaneously, the hexagonal shaft hole 901 on the seed metering disc 9 is engaged with the hexagonal shaft 701 on the main shaft sleeve 7 for synchronous rotation; the cylindrical boss 702 on the main shaft sleeve 7 is inserted into the bushing positioning hole 902 on the seed metering disc 9 from below. The hexagonal shaft hole 901 and the hexagonal shaft 701 are clearance fit, and the main drive shaft 1101 and the main shaft sleeve 7 are interference fit. The shaft fixing pin 6 passes through the pin hole 703 and the main rotating shaft positioning hole 1104 in sequence, thereby fixing the main shaft sleeve 7, the main drive shaft 1101 and the seed metering disc 9.

[0074] The positioning holes on the annular boss 507 on the lower end face of the upper housing 5 and the positioning holes on the annular boss 1001 of the chassis 10 are connected and fixed by bolts, and the chassis 10 is fixed on the frame by the frame fixing boss 1002.

[0075] The bottom plate 10 is provided with a seed feeding hole 1003, which is located directly below the soybean seed pushing mechanism 8.

[0076] As shown in Figure 1 , Figure 2 , Figure 3 and Figure 4 , the upper shell 5 is a hollow circular table structure in the center, and a space allowing the spindle sleeve 7 to rotate freely is provided in the middle. One end of the first, second and third seed cleaning brush fixing beams is fixed to the inner wall of the upper shell, and the other end is fixed to the outer surface of the hollow circular table, which does not hinder the movement of the seeds on the seed sowing plate 9. The seed tank guide pipe, the first, second and third seed cleaning brush fixing beams and the seed pushing mechanism positioning hole are sequentially arranged along the circumference of the seed tank 1, and the arrangement sequence is the same as the rotation direction of the seed sowing plate 9. The first, second and third seed cleaning brush fixing beams are respectively provided with first, second and third seed cleaning brush clamping grooves 502, 503 and 504.

[0077] The brush strip 201 is fixed with the first inclined brush outer shell 202 as the first seed cleaning brush 2, the brush strip 301 is fixed with the second inclined brush outer shell 302 as the second seed cleaning brush 3, and the brush strip 401 is fixed with the third upright brush outer shell 402 as the third seed cleaning brush 4. The first seed cleaning brush 2 is fixed in the first seed cleaning brush clamping groove 502, the second seed cleaning brush 3 is fixed in the second seed cleaning brush clamping groove 503, and the third seed cleaning brush 4 is fixed in the third seed cleaning brush clamping groove 504.

[0078] Due to the existence of the first inclined brush outer shell 202 and the second inclined brush outer shell 302, the brush strip 201 in the first seed cleaning brush 2 and the second seed cleaning brush 3 is inclined towards the seed feeding direction when the seed sowing plate 9 rotates. The brush strip 401 in the third seed cleaning brush 4 is perpendicular to the seed sowing plate 9.

[0079] As shown in Figure 1 , Figure 3 , Figure 11 and , the seed sowing plate 9 includes a disc surface 904, a hexagonal shaft hole 901, a shaft sleeve positioning hole 902 and a type hole 903. The hexagonal shaft hole 901 is located at the center of the disc surface 904, two shaft sleeve positioning holes 902 are symmetrically arranged on both sides of the hexagonal shaft hole 901, and a plurality of type holes 903 penetrating the disc surface 904 are arranged on the disc surface 904 in the form of adjacent inner and outer ring type holes.

[0080] Figure 3 As shown in Figure 11 , Figure 12 ,Figure 15 The illustrated type hole 903 has a top view shape slightly larger than the shape of the vertical projection in the seed side standing state (with the size reference being that a larger seed can easily fall in), and includes a seed containing space 9031 in communication with the lower end surface of the disc surface 904 and a seed blocking upper edge 9032 in communication with the upper end surface of the disc surface 904. The upper seed blocking upper edge 9032 can effectively block the seed from slipping out of the type hole due to vibration or inclination of the seed disc, while the lower seed containing space 9031 can accommodate the seed to adjust its posture inside the type hole and smoothly seed;

[0081] In this embodiment, the seed used is a round-shaped soybean seed, the thickness of the seed blocking upper edge 9032 is 0.1mm-1.5mm, and an auxiliary seed filling chamfer 9033 is provided between the seed blocking upper edge 9032 and the upper end surface, which can make the soybean seed smoothly fill into the type hole under the dual action of its own gravity and the friction of disc rotation; the brush bar 201 of the third seed cleaning brush 4 is in contact with the soybean seed disc 9, and the brush bar 201 of the first and second seed cleaning brushes 2 and 3 is bent after being pressed in contact with the soybean seed disc 9 due to the lower acute angle formed by the inclination, when the type hole rotates to the position of the first and second seed cleaning brushes 2 and 3, as shown, Figure 15 the brush bar 201 of the first and second seed cleaning brushes 2 and 3 extends into the seed containing space 9031 to clean out the excess seeds.

[0082] In this embodiment, the height of the seed containing space 9031 is 6.1mm, thereby ensuring compatibility with both larger and smaller soybean seeds;

[0083] In this embodiment, the type hole is used to fill soybean seeds, and therefore has a circular shape in plan view (perpendicular to the disc surface, i.e. has a circular inlet matching the shape of the vertical projection in the seed side standing state), with a circular diameter of 11cm;

[0084] In this embodiment, the soybean seed disc 9 has 20 type holes in each of the inner and outer circles on the upper end surface, and the inner and outer circles can achieve quantitative discharge of 40 soybean seeds, the two circles of type holes are staggered and have the same rotation frequency and period;

[0085] As shown in Figure 1 and Figure 10The soybean pushing mechanism 8 shown is composed of a pushing rod 801, a pushing rod fixing plate 802, a spring 803, an outer circle pushing wheel 804, an inner circle pushing wheel 805, a protrusion 806 and a pushing wheel mounting rod 807; the positioning hole on the pushing rod fixing plate 802 is fixed by bolt connection with the pushing mechanism positioning hole 505 on the upper shell 5, the root of the pushing rod 801 is hinged with the pushing rod fixing plate 802, one end of the spring 803 is fixed with the spring positioning boss 506 fixed on the upper shell 5, the other end of the spring 803 is fixed with the pushing rod 801, and the pushing rod 801 can be reset after rotating around the root caused by pushing seeds, so as to ensure the pushing operation of the next protrusion 806; the pushing wheel mounting rod 807 is fixed on the pushing rod 801, the pushing wheel mounting rod 807 is perpendicular to the moving direction of the pushing rod 801, and the outer circle pushing wheel 804 and the inner circle pushing wheel 805 are rotatably mounted on the pushing wheel mounting rod 807;

[0086] The outer periphery of the outer circle pushing wheel 804 and the inner circle pushing wheel 805 is uniformly provided with the protrusions 806 for pushing seeds, after each protrusion 806 performs the pushing seed operation on the seeds in the type hole, the seed blocking upper edge 9032 of the type hole 903 will push the protrusion 806 to disengage from one side, so as to push the pushing wheel;

[0087] In the embodiment, the inner circle pushing wheel 805 and the outer circle pushing wheel 804 are independently moved, and it is easy to understand that when the seed metering plate 9 is provided with only one circle of type holes, the pushing wheel is also only one; similarly, if the seed metering plate is provided with three or four circles of type holes, the number of pushing wheels is equal to the number of circles of type holes.

[0088] The working process of the embodiment 1 is as follows:

[0089] The funnel structure of the box 1 upper cover guides the soybean seeds to fall onto the soybean seed metering plate 9 through the seed guide pipe of the seed box. Under the auxiliary action of the seed filling chamfer, part of the seeds falls into the holes of the inner and outer circles of the soybean seed metering plate 9. The lower part of the seeds filled in the holes is in contact with the upper surface of the bottom plate 10. The other part of the seeds is continuously accumulated upward. The circular table in the center of the upper shell 5 ensures that the seeds do not gather in the middle of the seed plate. The power is transmitted to the main transmission shaft 1101 through the reversing gear after the power input shaft 1102 on the box is reversed, so as to drive the main shaft sleeve 7 and the soybean seed metering plate 9 to rotate. Under the rotation of the soybean seed metering plate 9, the seeds filled in the holes are brought to the seed dropping area. The seed pile is dispersed into a seed flow which first passes through the first seed cleaning area where the first seed cleaning brush 2 is located. The density of the seed flow is dispersed under the blocking action of the brush. At the same time, the first seed cleaning brush 2 can exert an upward inclined thrust on the excess seeds filled in the holes due to the inclined structure of the brush, so as to push the seeds out of the holes. The dispersed seed flow continues to flow to the second seed cleaning area where the second seed cleaning brush 3 is located under the driving of the soybean seed metering plate 9. At this time, the excess seeds filled in the holes which are not pushed out by the first seed cleaning brush 2 are continuously pushed out of the holes by the second seed cleaning brush 3. The density of the seed flow is also reduced again under the blocking action of the second seed cleaning brush 3. Finally, it reaches the third seed cleaning area where the third seed cleaning brush 4 is located. The third seed cleaning brush 4 performs the final seed cleaning work. However, the seed flow has been greatly dispersed by the first two seed cleaning brushes. At this time, the seeds no longer present a large density accumulation. If there are still excess seeds filled in the holes, they will be blocked by the double action of the third seed cleaning brush 4 which is in a vertical structure and the seed blocking plate, so as to prevent them from entering the seed dropping area. In the process from the first seed cleaning area to the second seed cleaning area and from the second seed cleaning area to the third seed cleaning area, the change of the terrain will cause the seed metering device to vibrate and thus cause the soybean seed metering plate 9 to shake. The seed blocking upper edge 9032 of the hole can effectively prevent the seeds from slipping out of the hole due to excessive vibration or inclination. The seeds in the holes entering the seed dropping area will be pushed out by the soybean seed pushing mechanism 8. The large seeds in the holes will give the seed pushing wheel a vertical upward force. At this time, the spring 803 plays a buffering role. The seeds in the outer circle holes of the soybean seed metering plate 9 first enter the seed dropping area and are pushed out by the outer circle seed pushing wheel 804 on the soybean seed pushing mechanism 8 and then fall through the seed dropping port 1003. The seeds in the inner circle holes are pushed out by the inner circle seed pushing wheel 805 and then fall through the seed dropping port 1003, so as to realize the precision and dense planting of the seeds.

[0090] As Figures 16 to 18 shown in the embodiment 2 of the application, the parts not described are the same as in embodiment 1. The difference is that the corn seed metering plate 12 is provided with a single circle of holes, and the holes match the shape (i.e. the projection shape) of the corn seeds in the vertical state.

[0091] In this embodiment, the holes are used to fill corn seeds, so they are in the shape of a slot hole when viewed from above.

[0092] In the embodiment, similar to the seed accommodating space 9031 of the soybean type hole 903 of the soybean seed sowing plate 9, the height of the seed accommodating space of the corn type hole 1201 of the corn seed sowing plate 12 is 7 mm, and the length of the seed accommodating space is 13.5 mm, so as to ensure that the corn seeds with large or small sizes are in the upright state in the type hole;

[0093] In the embodiment, the design of the circular shape of the lower end surface of the slot hole can reduce the change of the posture of the seed in the type hole during seed filling and prevent the seed from slipping out of the type hole due to vibration, and one rotation of the seed sowing plate can realize the quantitative discharge of 26 corn seeds; corresponding to the number of type hole rings, only one ring of the seed pushing wheel is arranged on the corn seed sowing plate 12, and the main structure form thereof is the same as that of the soybean seed pushing mechanism 8;

[0094] If the corn sowing operation is directly needed after the embodiment 1 is completed, the replacement can be directly performed on the basis of the embodiment 1; first, the shaft fixing pin 6 is pulled out, the main shaft sleeve 7 is taken off from the main transmission shaft 1101, the soybean seed sowing plate 9 is replaced by the corn seed sowing plate 12, and then the main shaft sleeve 7 and the shaft fixing pin 6 are installed, and at the same time, the soybean seed pushing mechanism 8 on the upper shell 5 is taken off and replaced by the corn seed pushing mechanism 13; similar to the soybean seeds, when the corn seeds fall from the seed guide pipe of the seed box 1, the corn seed pushing mechanism 13 pushes the accumulated corn seeds into the seed flow, and the seed flow density is gradually reduced through the three-stage seed cleaning brush, and at the same time, the excess seeds in the type hole are pushed out by the brush, as shown in Figure 18 , and finally pushed out by the corn seed pushing mechanism 13, so as to realize the precision sowing of the corn.

Claims

1. A horizontal disc-type precision seed metering device suitable for sloping land, characterized in that, include: Seed box (1), first-stage inclined seed cleaning brush (2), second-stage inclined seed cleaning brush (3), third-stage upright seed cleaning brush (4), upper shell (5), shaft fixing pin (6), seed pushing mechanism (8), seed dispensing tray (9), chassis (10) and bevel gear reversing box (11); wherein the bevel gear reversing box (11) is fixed below the chassis (10), the upper shell (5) is fixed above the chassis (10), and the chassis (10) is fixed to the frame; a seed inlet (1003) is opened on the chassis (10), and the seed inlet (1003) is located directly below the seed pushing mechanism; The upper shell (5) has a hollow frustum structure at its center. One end of the first-stage inclined seed cleaning brush fixing beam, the second-stage inclined seed cleaning brush fixing beam, and the third-stage upright seed cleaning brush fixing beam are fixed to the upper inner wall of the upper shell, and the other end is fixed to the upper outer surface of the hollow frustum. The seed pushing mechanism positioning hole (505) is set on the outer protrusion of the hollow frustum. The seed box guide tube, the first-stage inclined seed cleaning brush fixing beam, the second-stage inclined seed cleaning brush fixing beam, the third-stage upright seed cleaning brush fixing beam, and the seed pushing mechanism positioning hole of the seed box (1) are arranged in circumferential order. The arrangement order is consistent with the arrangement of the seed box guide tube, the first-stage inclined seed cleaning brush fixing beam, the second-stage inclined seed cleaning brush fixing beam, the third-stage upright seed cleaning brush fixing beam, and the seed pushing mechanism positioning hole. The rotation direction of the seed tray (9) is the same; the first-level inclined seed cleaning brush fixing beam, the second-level inclined seed cleaning brush fixing beam and the third-level upright seed cleaning brush fixing beam are respectively provided with a first-level seed cleaning brush slot (502), a second-level seed cleaning brush slot (503) and a third-level seed cleaning brush slot (504); the first brush strip (201) is fixed to the first-level inclined brush shell (202) as the first-level inclined seed cleaning brush (2), the second brush strip (301) is fixed to the second-level inclined brush shell (302) as the second-level inclined seed cleaning brush (3), and the third brush strip (201) is fixed to the second-level inclined brush shell (302) as the second-level inclined seed cleaning brush (3). The strip (401) is fixed to the outer shell (402) of the three-stage upright brush as the three-stage upright seed cleaning brush (4); the first-stage inclined seed cleaning brush (2) is fixed in the first-stage seed cleaning brush slot (502), the second-stage inclined seed cleaning brush (3) is fixed in the second-stage seed cleaning brush slot (503), and the three-stage upright seed cleaning brush (4) is fixed in the three-stage seed cleaning brush slot (504); the first brush strip (201) and the second brush strip (301) in the first-stage inclined seed cleaning brush (2) and the second-stage inclined seed cleaning brush (3) face the direction of seed arrival when the seed metering disc (9) rotates. Inclined; the third brush strip (401) in the three-stage upright seed cleaning brush (4) is perpendicular to the seed metering tray (9); the brush strips (201) in the first-stage inclined seed cleaning brush (2) and the second-stage inclined seed cleaning brush (3) are bent after being squeezed by the lower sharp corner formed by the inclination and contacting the seed metering tray (9). When the shaped hole rotates to the position of the first-stage inclined seed cleaning brush (2) and the second-stage inclined seed cleaning brush (3), the brush strips (201) in the first-stage inclined seed cleaning brush (2) and the second-stage inclined seed cleaning brush (3) extend into the seed-containing space (9031) to clean out the excess seeds; The main drive shaft (1101) of the bevel gear reversing box (11) is fixed in the center of the seed metering disc (9) and rotates together; the seed metering disc (9) includes: a disc surface (904) and a hole (903), wherein a plurality of holes (903) penetrating the disc surface (904) are evenly arranged in a circular circumferential direction on the disc surface (904); The shaped hole includes: a seed-accommodating space (9031) communicating with the lower end face of the plate (904) and a seed-blocking upper edge (9032) communicating with the upper end face of the plate (904). The upper seed-blocking upper edge (9032) can effectively prevent seeds from slipping out of the shaped hole due to vibration or tilting of the seed plate, while the lower seed-accommodating space (9031) can accommodate the seeds to adjust their posture inside the shaped hole and be successfully seeded. The thickness of the seed-blocking upper edge is 0.1mm~1.5mm.

2. The horizontal disc-type precision seed metering device suitable for sloping land according to claim 1, characterized in that, The top view shape of the aperture is slightly larger than the vertical projection shape of the seed when it is in a side-standing position.

3. A horizontal disc-type precision seed metering device suitable for sloping land according to claim 1 or 2, characterized in that, An auxiliary seed filling chamfer (9033) is provided between the upper edge of the seed block (9032) and the upper end face.

4. A horizontal disc-type precision seed metering device suitable for sloping land according to claim 3, characterized in that, The soybean pushing mechanism consists of a pushing rod (801), a pushing rod fixing plate (802), a spring (803), a pushing wheel, a protrusion (806), and a pushing wheel mounting rod (807). The positioning hole on the pushing rod fixing plate (802) is fixed to the pushing mechanism positioning hole (505) on the upper housing (5) by bolts. The root of the pushing rod (801) is hinged to the pushing rod fixing plate (802), and one end of the spring (803) is positioned by the spring of the upper housing (5). The boss (506) is fixed, and the other end of the spring (803) is fixed to the seed pusher (801). After the seed pusher (801) pushes the seed and rotates around the root, it can be reset, thereby ensuring the seed push operation of the next boss (806). The seed pusher mounting rod (807) is fixed on the seed pusher (801). The seed pusher mounting rod (807) is perpendicular to the direction of movement of the seed pusher (801). The seed pusher is mounted on the seed pusher mounting rod (807) by rotational connection. The outer circumference of the seed-pushing wheel is uniformly provided with protrusions (806) for pushing seeds. After each protrusion (806) pushes the seeds in the hole, the upper edge (9032) of the hole (903) will push the protrusion (806) to disengage from the engaging side.

5. A horizontal disc-type precision seed metering device suitable for sloping land according to claim 3, characterized in that, The brush strips (201) in the three-stage upright seed cleaning brush (4) come into contact with the seed metering tray (9).

6. A horizontal disc-type precision seed metering device suitable for sloping land according to claim 3, characterized in that, The hole is circular when viewed from above.

7. A horizontal disc-type precision seed metering device suitable for sloping land according to claim 6, characterized in that, The pore is used to fill soybean seeds, and the pore diameter is 11cm, with a seed-holding space height of 6.1mm.

8. A horizontal disc-type precision seed metering device suitable for sloping land according to claim 3, characterized in that, The hole is viewed from above as a slot shape.

9. A horizontal disc-type precision seed metering device suitable for sloping land according to claim 8, characterized in that, It is used to fill corn seeds, and the seed-holding space is 13.5mm long and 7mm high.

10. A horizontal disc-type precision seed metering device suitable for sloping land according to claim 1, characterized in that, The hexagonal shaft (701) on the main shaft sleeve (7) is inserted into the hexagonal shaft hole (901) on the seed metering disc (9), and the main shaft sleeve (7) is inserted into the main drive shaft (1101) of the bevel gear reversing box (11); the cylindrical boss (702) on the main shaft sleeve (7) is inserted from below into the bushing positioning hole (902) on the seed metering disc (9), the main drive shaft (1101) and the main shaft sleeve (7) are interference fit, and the shaft fixing pin (6) passes through in sequence. The pin hole (703) and the main rotating shaft positioning hole (1104) on the main shaft bushing (7) are used to fix the main shaft bushing (7), the main drive shaft (1101) and the seed metering disc (9); the positioning hole on the annular boss (507) on the lower end face of the upper housing (5) and the positioning hole on the annular boss (1001) of the chassis (10) are fixed by bolts, and the chassis (10) is fixed on the frame by the frame fixing boss (1002); When it is necessary to replace soybean seeding trays with corn seeding trays, First, pull out the shaft fixing pin (6), remove the main shaft bushing (7) from the main drive shaft (1101), replace the soybean seed metering disc with the corn seed metering disc, and then install the main shaft bushing (7) and the shaft fixing pin (6) respectively. At the same time, remove the soybean pushing mechanism on the upper housing (5) and replace it with the corn pushing mechanism. The number of pushing wheels in the corn pushing mechanism is equal to the number of circles in the center hole of the corn seed metering disc.

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