CN211745667U

CN211745667U - Automatic seeding device for seedling trays

Info

Publication number: CN211745667U
Application number: CN201922444169.7U
Authority: CN
Inventors: 彭康益
Original assignee: Guangdong Kolea Modern Agricultural Equipment Co ltd
Current assignee: Guangdong Kolea Modern Agricultural Equipment Co ltd
Priority date: 2019-12-27
Filing date: 2019-12-27
Publication date: 2020-10-27
Anticipated expiration: 2029-12-27

Abstract

The utility model discloses an automatic seeding device for seedling trays, which is provided with a hopper, a feeding roller and a flat rolling brush, wherein seeds are placed in the hopper, are taken out of the hopper along with the rotation of the feeding roller and are scattered on the seedling tray below, part of the seeds fall into recesses of the seedling tray at random, and part of the seeds fall out of the recesses of the seedling tray at random; the brush flat rolling brush is arranged at the rear side of the feeding roller and in the moving direction of the seedling tray after the seedling tray receives the materials, and is used for brushing seeds into the recesses of the seedling tray; when the seedling tray moves to the lower part of the brush flat rolling brush on the production line, seeds which do not fall into the concave cavities of the seedling tray are brushed by the brush flat rolling brush and can fall into the concave cavities, thereby reducing the waste phenomenon of the seeds.

Description

Automatic seeding device for seedling trays

Technical Field

The utility model belongs to the technical field of agricultural automatic apparatus equipment, in particular to automatic seeder of seedling dish.

Background

With the development of society, agriculture is also automated in all aspects, and in the field of seed breeding and seedling raising, the company develops an assembly line for automatically sowing seedling trays; when the seedling tray moves forward on the conveyer belt, an automatic seeding device is needed to be arranged to sow seeds on the seedling tray.

In the seedling raising tray type seeding equipment in the prior art, when seeds are sowed, the precision is often insufficient, the sowed seeds cannot fall into the recesses of the seedling raising tray, and the seeds which do not fall into the recesses cannot be used even if the seeds germinate; the waste of seeds is caused; uneven seeding, difficult control of precision and unfavorable growth of crops in later period.

SUMMERY OF THE UTILITY MODEL

In order to overcome the deficiencies in the prior art, the utility model provides an automatic seeder of seedling dish is equipped with the blowing roller and the flat round brush of brush, through the speed of the steerable blowing of rotation of blowing roller, through the roll of the flat round brush of brush, can be with falling in the cave is gone into to the seed brush outside the seedling dish cave.

The utility model provides a technical scheme that its technical problem adopted is:

an automatic seeding device of a seedling tray comprises a hopper, a feeding roller and a flat rolling brush; a discharge port is formed in the lower end of the hopper, a discharging roller is arranged at the discharge port, and grooves are formed in the circumferential surface of the discharging roller; the seeds in the hopper fall into the groove, move out of the discharge port of the hopper along with the rotation of the discharging roller and fall onto a seedling tray below; the discharging speed of the discharging port is controlled by the rotating speed of the discharging roller; the rear side of the material placing roller is positioned in the moving direction of the seedling tray after the material receiving, and a flat rolling brush for brushing seeds into the recesses of the seedling tray is also arranged.

The automatic seeding device for the seedling tray in the technical scheme is provided with a hopper, a feeding roller and a brush flat rolling brush, wherein seeds are placed in the hopper, are taken out of the hopper along with the rotation of the feeding roller and are scattered on the seedling tray below, part of the seeds fall into recesses of the seedling tray randomly, and part of the seeds fall out of the recesses of the seedling tray randomly; the brush flat rolling brush is arranged at the rear side of the feeding roller and in the moving direction of the seedling tray after the seedling tray receives the materials, and is used for brushing seeds into the recesses of the seedling tray; when the seedling tray moves to the lower part of the brush flat rolling brush on the production line, seeds which do not fall into the concave cavities of the seedling tray are brushed by the brush flat rolling brush and can fall into the concave cavities, thereby reducing the waste phenomenon of the seeds.

In some embodiments, the side of the discharging roller away from the flat rolling brush is a rolling discharging side, and the seeds move out of the hopper from the rolling discharging side along with the rotation of the discharging roller; gaps are reserved between the side walls of the two sides of the discharge hole of the hopper and the discharging roller; one side of the discharge port, which is far away from the rolling discharge side, is provided with a sealing plastic plate for filling the side gap, one side of the sealing plastic plate is positioned on the outer side wall of the hopper and is fixed through a sealing plate pressing strip, and the other side of the sealing plastic plate is bent, extended and filled in the side gap; and one side of the discharge port, which is positioned on the rolling discharge side, is provided with an adjusting device for adjusting the size of the discharge gap. First, set up the roll delivery side of blowing roller in the one side of keeping away from the flat round brush of brush, be favorable to the flat round brush of brush to be close to the blowing roller and set up to make the compactness more of structure. Secondly, in theory, there is a gap between the two objects, but here the gap is sufficient to pass through the seeds, which is larger than 1 seed diameter. If the clearance between the global of blowing roller and the discharge gate lateral wall is less than the clearance of seed, the seed just can be taken out along with rotating through the recess that falls into the blowing roller. The required seed density is different corresponding to different seed sowing, when some seeds need to be discharged quickly, the discharging speed is increased only by the rotating speed, so that great centrifugal inertia force is brought to the seeds, the sowing is not facilitated, and the size of the groove can be increased in a certain writing embodiment, so that the groove can accommodate more seeds and does not need too high speed; however, if the sowing speed is increased under the condition of not increasing the groove, the gap can be increased, so that partial seeds can be taken out of the hopper from the gap by the rotating friction force even if the partial seeds do not fall into the groove; under the scheme, a gap needs to be blocked at the side where the material is not discharged from the discharge hole, and a sealing plastic plate is arranged; the size of clearance is adjusted to the further adjusting device that sets up in one side of the ejection of compact, so the seeding of adaptable different seeds, control seeding speed and seeding density that can be more convenient.

In some embodiments, the adjusting device comprises an adjusting shaft handle, an adjusting shaft, an adjusting gear, an adjusting toothed plate and an adjusting lifting plate; the adjusting shaft is rotatably and fixedly arranged, one end of the adjusting shaft is provided with an adjusting shaft handle, and the adjusting shaft handle is used for manually rotating to drive the adjusting shaft to rotate; an adjusting gear is arranged on the adjusting shaft; one side of adjusting the pinion rack is fixed on adjusting the lifter plate, adjusts pinion rack and adjusting gear meshing, one side that the adjusting the pinion rack was kept away from to the adjusting the lifter plate is hugged closely the lower extreme of hopper is located the lateral wall department of roll ejection of compact side, adjusting gear's rotation drives adjusting the pinion rack and adjusts the lifter plate up-and-down motion to the lower extreme that makes the adjusting the lifter plate is close to the blowing roller motion and closes this side clearance gradually, perhaps makes the lower extreme of adjusting the lifter plate keep away from the blowing roller motion and opens this side clearance gradually.

In some embodiments, two ends of the discharging roller are provided with support plates for fixing the discharging roller, the outer side of each support plate is provided with a bearing sleeve, and a main shaft of the discharging roller is rotatably and fixedly connected onto the bearing sleeves through bearings; the upper ends of the two support plates are respectively provided with a fixing part for fixing the hopper, and two sides of the lower end of the hopper are respectively fixedly connected with the two support plates.

In some embodiments, the inner sides of the two support plates are provided with guide plates for guiding the falling seeds to accurately fall into the seedling tray below without escaping from the lateral direction of the advancing direction of the seedling tray.

In some embodiments, the grooves are elongated grooves, and the axes of the grooves are parallel to the axis of the discharging roller. The elongated groove can be semicircular in cross section and elongated in longitudinal section; the cross section of the material can be square, or other shapes can be adopted.

In some embodiments, one end of the discharging roller is provided with a driving belt wheel for driving connection with a driving motor, and the other end of the discharging roller is provided with a discharging driving chain wheel; a brush flat transmission chain wheel is arranged at one end, corresponding to the emptying transmission chain wheel, of a main shaft of the brush flat rolling brush, and the emptying transmission chain wheel is in transmission connection with the brush flat transmission chain wheel.

In some embodiments, the brush flat rolling brush comprises a rolling brush main shaft, a rolling brush wheel sleeved on the rolling brush main shaft, an elastic retainer ring for the shaft between the rolling brush wheel and the rolling brush main shaft, and a plurality of elastic brush hairs arranged on the outer peripheral surface of the rolling brush wheel.

In some embodiments, a motor speed regulator is further arranged on the outer side wall of the hopper, and the motor speed regulator is electrically connected with a driving motor for driving the discharging roller to rotate and used for controlling the rotating speed of the discharging roller; and a support flat iron support is further arranged on the outer wall of the hopper and used for providing support fixing force for the hopper from the side position of the hopper.

The utility model has the advantages that: the utility model discloses an automatic seeding device of a seedling tray, which is provided with a hopper, a feeding roller and a brush flat rolling brush, wherein seeds are placed in the hopper, are taken out of the hopper along with the rotation of the feeding roller and are scattered on the seedling tray below, part of the seeds fall into recesses of the seedling tray at random, and part of the seeds fall out of the recesses of the seedling tray at random; the brush flat rolling brush is arranged at the rear side of the feeding roller and in the moving direction of the seedling tray after the seedling tray receives the materials, and is used for brushing seeds into the recesses of the seedling tray; when the seedling tray moves to the lower part of the brush flat rolling brush on the production line, seeds which do not fall into the concave cavities of the seedling tray are brushed by the brush flat rolling brush and can fall into the concave cavities, thereby reducing the waste phenomenon of the seeds.

Drawings

The present invention will be further explained with reference to the drawings and examples.

Fig. 1 is a schematic structural view of an automatic seeding device for seedling trays according to the present invention;

fig. 2 is a schematic top view of the automatic seeding device for seedling trays of the present invention;

fig. 3 is a sectional view taken along line a-a in fig. 2:

FIG. 4 is an enlarged schematic view of region B of FIG. 3;

FIG. 5 is a schematic view of the mounting structure of the discharge roller;

FIG. 6 is a schematic view of a brush flat roller brush;

fig. 7 is a schematic view of the mounting structure of the brush flat roller brush.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic drawings and illustrate the basic structure of the present invention only in a schematic manner, and thus show only the components related to the present invention.

In the description of the present application, it is to be understood that the terms "longitudinal," "radial," "length," "width," "thickness," "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the present invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the present invention. In the description of the present application, "a plurality" means two or more unless otherwise specified.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

An automatic seeding device for seedling trays as shown in figures 1-7 comprises a hopper 1, a feeding roller 2 and a brush flat rolling brush 3; a discharge hole is formed in the lower end of the hopper, a discharging roller 2 is arranged at the discharge hole, and a groove 23 is formed in the circumferential surface of the discharging roller 2; the seeds in the hopper 1 fall into the groove 23 and move out of the discharge port of the hopper 1 along with the rotation of the discharging roller 1 and fall onto a seedling tray (not shown) below; the discharging speed of the discharging port is controlled by the rotating speed of the discharging roller 2; the rear side of the material placing roller 2 is positioned in the moving direction of the seedling tray after the material receiving, and a flat rolling brush 3 for brushing seeds into the recesses of the seedling tray is also arranged.

The seedling tray is arranged on the assembly line (the structure of the assembly line is not shown in the application), and the seedling tray moves on the assembly line along with the conveying device; the automatic seeding device is arranged on a bracket of the assembly line and is positioned above the moving direction of the seedling tray; when the seedling trays pass under one another, the discharging roller rotates, and seeds can fall onto the seedling trays; the seedling tray is provided with recesses at intervals, seeds fall into the recesses, the recesses are filled with soil (the outside of the recesses is not covered with soil), after the seeds germinate, the soil is connected with the roots of the seedlings, and the seeds can be pulled out for manual throwing planting or mechanized planting. The automatic seeder of prior art, it is main that some seeds do not fall into the cave, do not have soil, can not sprout, even sprout also can not be used for throwing and throwing the planting, cause the seed extravagant.

Referring to fig. 1 and 2, and referring to fig. 3 and 4, the automatic seeding device for seedling trays in the above technical solution is provided with a hopper 1, a discharging roller 2, and a brush flat rolling brush 3, wherein seeds are placed in the hopper 1, are carried out of the hopper 1 along with the rotation of the discharging roller 2, and are scattered on a seedling tray (not shown) below, part of the seeds fall into recesses of the seedling tray at random, and part of the seeds fall out of the recesses of the seedling tray at random; as shown in fig. 3, the application is further provided with a flat rolling brush 3 for brushing seeds into the recesses of the seedling trays (when setting, the distance and height between the brush hairs and the seedling trays on the production line are controlled, so that the brush hairs can effectively brush seeds which do not fall into the recesses on the upper surface of the seedling trays when rotating, and since a plurality of recesses of the seedling trays are generally arranged uniformly in a staggered manner, substantially all seeds can be brushed into the recesses); when the seedling tray moves to the lower part of the brush flat rolling brush 3 on the production line, seeds which do not fall into the concave cavities of the seedling tray are brushed by the brush flat rolling brush and can fall into the concave cavities, thereby reducing the waste phenomenon of the seeds.

As shown in figures 3 and 4, in some embodiments, the side of the discharging roller 2 away from the brush flat rolling brush 3 is a rolling discharging side, and the seeds move from the rolling discharging side to the discharging hopper 1 along with the rotation of the discharging roller 3 (the position of the rolling discharging side can be set by controlling the rotation direction of the discharging roller 2; in figure 3, the rotation direction of the discharging roller 2 is counterclockwise, so that the rolling discharging side is located at the side away from the brush flat rolling brush 3 during discharging, and meanwhile, the seedling tray moves from left to right); gaps are reserved between the side walls of the two sides of the discharge hole of the hopper 1 and the discharging roller 2; one side of the discharge port, which is far away from the rolling discharge side (namely, one side close to the flat rolling brush 3), is provided with a sealing plastic plate 8 for filling a side gap, one side of the sealing plastic plate 8 is positioned on the outer side wall of the hopper and is fixed through a sealing plate pressing strip 9, and the other side of the sealing plastic plate is bent, extended and filled in the side gap; and one side of the discharge port, which is positioned on the rolling discharge side, is provided with an adjusting device for adjusting the size of the discharge gap. First, set up the roll delivery side of blowing roller 2 in the one side of keeping away from brush flat rolling brush 3, be favorable to brush flat rolling brush 3 to be close to blowing roller 2 and set up to make the compactness more of structure. (if the rolling discharge side is arranged at one side close to the brush flat rolling brush 3, the blanking positions of the brush hair of the brush flat rolling brush 3 and the seeds need to be staggered, so that the dryness is avoided, and the setting distance is increased). Secondly, in theory, there is a gap between the two objects, but in this application the gap is sufficient to pass through the seeds, which is larger than 1 seed diameter. If the clearance between the global of blowing roller and the discharge gate lateral wall is less than the clearance of seed, the seed just can be taken out along with rotating through the recess that falls into the blowing roller. The required seed density is different corresponding to different seed sowing, when certain types of seeds need to be discharged quickly, the discharging speed is increased only by the rotating speed, so that great centrifugal inertia force is brought to the seeds, automatic sowing is not facilitated, the size of the groove can be increased in certain embodiments, and the groove can accommodate more seeds without too high speed; however, if the sowing speed is increased under the condition of not increasing the grooves, the scheme of the embodiment can be adopted, the gaps are increased, and partial seeds can be taken out of the hopper from the gaps by the rotating friction force even if not falling into the grooves; under the scheme, a gap on one side of the discharge port, which is not discharged, needs to be blocked, so that seeds cannot leak from the gap on the side, and a sealing plastic plate 8 is arranged; (the sealing rubber plate 8 has certain elasticity and softness, and can effectively prevent seeds from leaking from the side gap under the condition that the discharging roller 2 rotates, and cannot form any obstruction to the rotation of the discharging roller and extrusion injury to the seeds.) the size of the gap is further adjusted by arranging an adjusting device at one side of the discharging roller, so that the device can adapt to the seeding of different seeds, and the seeding speed and the seeding density can be controlled more conveniently.

As shown in fig. 1 and 4, in some embodiments, the adjusting device includes an adjusting shaft handle 42, an adjusting shaft 41, an adjusting gear 43, an adjusting toothed plate 44, and an adjusting lifting plate 45; the adjusting shaft 41 is rotatably and fixedly arranged (in some embodiments, the adjusting shaft can be fixed on a support frame of the production line through a bracket, in the embodiment of fig. 4, the adjusting shaft is fixed on the support plate 5 through a flat steel bracket, and the support plate 5 is fixed with an integral bracket of an external production line), one end of the adjusting shaft 41 is provided with an adjusting shaft handle 42, and the adjusting shaft handle 42 is used for manually rotating to drive the adjusting shaft 41 to rotate; the adjusting shaft 41 is provided with an adjusting gear 43; one side of adjusting toothed plate 44 is fixed on adjusting lifter plate 45, adjusts toothed plate 44 and adjustment gear 43 meshing, one side that adjusting toothed plate 44 was kept away from to adjusting lifter plate 45 is hugged closely the lower extreme of hopper 1 is located the lateral wall department of roll ejection of compact side, the rotation of adjusting gear 43 drives adjusting toothed plate 44 and adjusting lifter plate 45 up-and-down motion to the lower extreme that makes adjusting lifter plate 45 is close to the motion of blowing roller 2 and closes this side clearance gradually, perhaps makes the lower extreme of adjusting lifter plate 45 keep away from the motion of blowing roller 2 and opens this side clearance gradually.

As shown in fig. 1 and 5, in some embodiments, both ends of the discharging roller 2 are provided with a support plate 5 for fixing the discharging roller 2, a bearing sleeve 51 is arranged outside the support plate 5, and a main shaft of the discharging roller 2 is rotatably and fixedly connected to the bearing sleeve 51 through a bearing; the upper ends of the two support plates 5 are respectively provided with a fixing part 52 for fixing the hopper 1, and two sides of the lower end of the hopper 1 are respectively fixedly connected with the two support plates 5.

As shown in fig. 1 and 3, in some embodiments, the inner sides of the two support plates 5 are provided with guide plates 7 for guiding the falling seeds to fall into the seedling tray below accurately without escaping from the lateral direction of the advancing direction of the seedling tray.

Referring to fig. 4 and 5, in some embodiments, the grooves 23 are elongated grooves having an axis parallel to the axis of the discharge roller 2. The elongated groove can be semicircular in cross section and elongated in longitudinal section; the cross section of the material can be square, or other shapes can be adopted.

In some embodiments, one end of the discharging roller 2 is provided with a driving belt wheel 21 for driving connection with a driving motor, and the other end is provided with a discharging driving chain wheel 22; the main shaft of the brush flat rolling brush 3 is provided with a brush flat transmission chain wheel 35 (marked in figure 1) corresponding to one end of the emptying transmission chain wheel 22, and the emptying transmission chain wheel 22 is in transmission connection with the brush flat transmission chain wheel 35.

As shown in fig. 6 and 7, in some embodiments, the brush flat rolling brush 3 includes a rolling brush main shaft 31, a rolling brush wheel 32 sleeved on the rolling brush main shaft, a shaft elastic collar 33 located between the rolling brush wheel 32 and the rolling brush main shaft, and a plurality of elastic bristles 34 disposed on an outer peripheral surface of the rolling brush wheel. As shown in fig. 6 and 7, bearings and bearing sleeves 35 can be arranged at two ends of the main shaft of the brush flat rolling brush 3, and the bearing sleeves 35 can be fixed with an external bracket; the brush flat rolling brush 3 can rotate under the support of the bearing; of course, in some embodiments, as shown in fig. 7, the bearing sleeve 35 of the brush flat rolling brush 3 may also be movably arranged, and movably fixed by the adjusting device 351, so that the position of the brush flat rolling brush 3 can be adjusted; in fig. 7, adjusting device 351 is by adjusting bolt, the support piece constitutes, the support piece is fixed on the bearing structure of assembly line, adjusting bolt sets up in the screw of support piece upper end, adjusting bolt's the other end is fixed with the bearing housing, the bearing housing sets up on a slide rail bracket, slide rail bracket is fixed with assembly line bearing structure, or fix on mounting panel 5, so through rotatory adjusting bolt, just can make the motion of bearing housing 35 on slide rail bracket, thereby make flat round brush 3 of brush keep away from or be close to blowing roller 2, be convenient for install the chain on blowing roller sprocket 22 and the flat round brush sprocket 35 of brush, then adjusting distance makes the chain tighten.

As shown in fig. 1, in some embodiments, a motor speed regulator 6 is further disposed on an outer side wall of the hopper 1, and the motor speed regulator 6 is electrically connected to a driving motor (not shown, in some embodiments, the driving motor may be disposed on a bracket of the assembly line, or at another position, how to form a transmission relationship between an output shaft of the driving motor and a pulley, which is a conventional technical means of those skilled in the art) for controlling a rotation speed of the discharging roller 2; still be equipped with on the hopper 1 outer wall and support the band iron support for from the side position of hopper 1 to provide the support fixing power to hopper 1.

In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. The utility model provides an automatic seeder of seedling dish which characterized in that: comprises a hopper, a discharging roller and a brushing flat rolling brush; a discharge port is formed in the lower end of the hopper, a discharging roller is arranged at the discharge port, and grooves are formed in the circumferential surface of the discharging roller; the seeds in the hopper fall into the groove, move out of the discharge port of the hopper along with the rotation of the discharging roller and fall onto a seedling tray below; the discharging speed of the discharging port is controlled by the rotating speed of the discharging roller; the rear side of the material placing roller is positioned in the moving direction of the seedling tray after the material receiving, and a flat rolling brush for brushing seeds into the recesses of the seedling tray is also arranged.

2. The automatic seeding device for seedling trays according to claim 1, characterized in that: one side of the discharging roller, which is far away from the flat rolling brush, is a rolling discharging side, and the seeds move out of the hopper from the rolling discharging side along with the rotation of the discharging roller; gaps are reserved between the side walls of the two sides of the discharge hole of the hopper and the discharging roller; one side of the discharge port, which is far away from the rolling discharge side, is provided with a sealing plastic plate for filling the side gap, one side of the sealing plastic plate is positioned on the outer side wall of the hopper and is fixed through a sealing plate pressing strip, and the other side of the sealing plastic plate is bent, extended and filled in the side gap; and one side of the discharge port, which is positioned on the rolling discharge side, is provided with an adjusting device for adjusting the size of the discharge gap.

3. The automatic seeding device for seedling trays according to claim 2, wherein: the adjusting device comprises an adjusting shaft handle, an adjusting shaft, an adjusting gear, an adjusting toothed plate and an adjusting lifting plate; the adjusting shaft is rotatably and fixedly arranged, one end of the adjusting shaft is provided with an adjusting shaft handle, and the adjusting shaft handle is used for manually rotating to drive the adjusting shaft to rotate; an adjusting gear is arranged on the adjusting shaft; one side of adjusting the pinion rack is fixed on adjusting the lifter plate, adjusts pinion rack and adjusting gear meshing, one side that the adjusting the pinion rack was kept away from to the adjusting the lifter plate is hugged closely the lower extreme of hopper is located the lateral wall department of roll ejection of compact side, adjusting gear's rotation drives adjusting the pinion rack and adjusts the lifter plate up-and-down motion to the lower extreme that makes the adjusting the lifter plate is close to the blowing roller motion and closes this side clearance gradually, perhaps makes the lower extreme of adjusting the lifter plate keep away from the blowing roller motion and opens this side clearance gradually.

4. The automatic seeding device for seedling trays according to claim 1, characterized in that: support plates for fixing the discharging roller are arranged at two ends of the discharging roller, a bearing sleeve is arranged on the outer side of each support plate, and a main shaft of the discharging roller is rotatably and fixedly connected onto the bearing sleeve through a bearing; the upper ends of the two support plates are respectively provided with a fixing part for fixing the hopper, and two sides of the lower end of the hopper are respectively fixedly connected with the two support plates.

5. The automatic seeding device for seedling trays according to claim 4, wherein: the inner sides of the two support plates are provided with guide plates for guiding the falling seeds to accurately fall into the seedling tray below without escaping from the side direction of the advancing direction of the seedling tray.

6. The automatic seeding device for seedling trays according to claim 1, characterized in that: the groove is a strip-shaped groove, and the axis of the groove is parallel to the axis of the discharging roller.

7. The automatic seeding device for seedling trays according to claim 1, characterized in that: one end of the discharging roller is provided with a driving belt wheel for driving connection with a driving motor, and the other end of the discharging roller is provided with a discharging driving chain wheel; a brush flat transmission chain wheel is arranged at one end, corresponding to the emptying transmission chain wheel, of a main shaft of the brush flat rolling brush, and the emptying transmission chain wheel is in transmission connection with the brush flat transmission chain wheel.

8. The automatic seeding device for seedling trays according to claim 1, characterized in that: the brush flat rolling brush comprises a rolling brush main shaft, a rolling brush wheel sleeved on the rolling brush main shaft, an elastic retainer ring for the shaft positioned between the rolling brush wheel and the rolling brush main shaft, and a plurality of elastic brush hairs arranged on the peripheral surface of the outer side of the rolling brush wheel.

9. The automatic seeding device for seedling trays according to claim 1, characterized in that: the outer side wall of the hopper is also provided with a motor speed regulator, and the motor speed regulator is electrically connected with a driving motor for driving the discharging roller to rotate and is used for controlling the rotating speed of the discharging roller; and a support flat iron support is further arranged on the outer wall of the hopper and used for providing support fixing force for the hopper from the side position of the hopper.