A soil screening machine for tomato seedlings

Abstract

The present invention relates to the technical field of soil screening, and discloses a tomato seedling soil screening machine, comprising a disc seat, a screening mechanism and a striking mechanism; the screening mechanism comprises a first oblique support rod and a second oblique support rod arranged on the disc seat, the first oblique support rod extending in a direction away from the center of the disc seat, a first fixing ring being arranged on the first oblique support rod, and a screening rope being arranged on the side of the first fixing ring; the striking mechanism comprises an oblique support rod arranged on the side of the disc seat, an extending beam being arranged above the oblique support rod, the end of the extending beam being rotatably connected to a rotating shaft, and a striking blade being arranged outside the rotating shaft. The present invention achieves a soil screening effect by designing a rotating striking blade to knock away stones mixed in the soil, and also breaks the agglomerated soil blocks by the striking blades during the screening process, so as to facilitate the subsequent soil planting of tomato seedlings.

Description

Technical Field

[0001] The invention relates to the technical field of soil screening, in particular to a tomato seedling soil screening machine. Background Art

[0002] In the process of tomato planting, breeding is generally carried out first, then seedling raising, and then transplanting. In order to ensure the survival rate of tomato seedlings after transplanting, the tomato seedlings are first raised in seedling trays to ensure the quality of the tomato seedlings. In order to reduce other problems caused by changes in the soil environment during transplanting, the soil at the planting site can be screened and used for seedling raising.

[0003] Since the planting site is in an outdoor environment, some stones will remain in the surface soil. Large stones will affect the normal production of tomato seedlings, so the stones need to be removed. The common screening machine is just a screen, which causes some lumps of soil to be screened out, resulting in soil waste, so it needs to be improved. Summary of the invention

[0004] The invention provides a tomato seedling soil screening machine, which solves the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A tomato seedling soil screening machine comprises a disc seat, a screening mechanism and a striking mechanism; the screening mechanism comprises a first oblique support rod and a second oblique support rod arranged on the disc seat, the first oblique support rod extending in a direction away from the center of the disc seat, a first fixing ring is arranged on the first oblique support rod, a screening rope is arranged on the side of the first fixing ring, a counterweight ball is connected to the free end of the screening rope, the second oblique support rod is inclined and extends in a direction toward the center of the disc seat, a second fixing ring is arranged at the end of the second oblique support rod, a conical material guide barrel is arranged in the middle of the second fixing ring, and the screening rope passes through the gap between the conical material guide barrel and the second fixing ring; the striking mechanism comprises an oblique support rod arranged on the side of the disc seat, a protruding beam is arranged above the oblique support rod, the end of the protruding beam is rotatably connected to a rotating shaft, and a striking blade is arranged on the outside of the rotating shaft.

[0007] As a preferred technical solution of the present invention, the first fixing ring is higher than the second fixing ring, the diameter of the first fixing ring is larger than the diameter of the second fixing ring, the inner wall of the second fixing ring is an arc surface, and the inner ring of the second fixing ring is provided with a connecting cross bar fixedly connected to the conical material guide barrel. The center lines of the first fixing ring, the second fixing ring and the conical material guide barrel are arranged in a colinear manner, the end of the conical material guide barrel is higher than the second fixing ring, the diameter of the upper end of the conical material guide barrel is larger than the inner diameter of the second fixing ring, and the lower end of the conical material guide barrel is provided with a discharge pipe.

[0008] As a preferred technical solution of the present invention, the end of the first diagonal support rod is detachably connected to a support ring, the support ring is provided with a slot matched with the end of the first diagonal support rod, and the support ring is provided with a protective cloth sleeved on the outside of the first fixing ring. The side of the first diagonal support rod is provided with a hook, and the hook is detachably connected to the first fixing ring.

[0009] As a preferred technical solution of the present invention, a top plate is provided at the end of the diagonal support rod, a rotating seat is provided at the end of the top plate, the rotating seat is rotatably connected to the side of the extending beam, a first pad matched with the top plate is provided at the end of the extending beam, and a second pad matched with the extending beam is provided on the top plate. A conical protective cover is provided at the end of the rotating shaft away from the striking blade, a triangular protective cover is provided on the side of the extending beam close to the conical protective cover, and a transmission protective cover is provided on the side of the extending beam away from the conical protective cover. A bearing seat fixedly connected to the extending beam is provided inside the transmission protective cover, the bearing seat is rotatably connected to the transmission shaft, a first bevel gear is provided at the end of the transmission shaft close to the rotating shaft, the first bevel gear is meshed and connected to the second bevel gear, the second bevel gear is fixed to the beam connected to the rotating shaft, a driving motor is provided at the end of the extending beam, and the output shaft of the driving motor is fixedly connected to the end of the transmission shaft.

[0010] As a preferred technical solution of the present invention, striking blades are arranged at different heights of the rotating shaft, the striking blades are of arc-shaped structure, and the middle part of the striking blades protrudes toward the direction of rotation of the rotating shaft.

[0011] The present invention has the following benefits:

[0012] By designing a rotating striking blade, the stones mixed in the soil are knocked away, thereby achieving a soil screening effect. In the screening process, the striking blades are also used to break up the lumps of soil, making it easier to plant tomato seedlings in the subsequent soil. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 The present invention is a structural schematic diagram of a tomato seedling soil screening machine.

[0015] Figure 2 This is a schematic diagram of the structure of a tomato seedling soil screening machine after removing the protective cloth.

[0016] Figure 3 for Figure 2 Right view of .

[0017] Figure 4 The present invention is a schematic diagram of the structure of a tomato seedling soil screening machine after the beating blades are rotated to the outside.

[0018] Figure 5 The present invention is a structural schematic diagram of the cooperation between the first oblique support rod and the support ring in a tomato seedling soil screening machine.

[0019] Figure 6 The present invention is a schematic diagram of the structure of a screening mechanism in a tomato seedling soil screening machine.

[0020] Figure 7 for Figure 6 A partially enlarged schematic diagram of A in FIG.

[0021] Figure 8 It is a schematic diagram of the structure in which a screening rope in a tomato seedling soil screening machine passes through the gap between a conical material guide barrel and a second fixed ring.

[0022] Fig. 9 The present invention is a structural schematic diagram of the connection between a conical material guide barrel and a discharge pipe in a tomato seedling soil screening machine.

[0023] Fig.10 The present invention is a schematic diagram of the structure of a beating mechanism in a tomato seedling soil screening machine.

[0024] Fig.11 The present invention is a structural schematic diagram of a tomato seedling soil screening machine with the striking mechanism in which the transmission protective cover is removed.

[0025] Fig.12 for Fig.11 Top view of the .

[0026] In the figure: 1. disc seat; 2. screening mechanism; 3. striking mechanism; 4. first oblique support rod; 5. first fixed ring; 6. screening rope; 7. counterweight ball; 8. second oblique support rod; 9. second fixed ring; 10. conical guide barrel; 11. discharge pipe; 12. hook; 13. connecting cross bar; 14. protective cloth; 15. support ring; 16. oblique support rod; 17. extending beam; 18. transmission protective cover; 19. rotating shaft; 20. striking blade; 21. conical protective cover; 22. triangular protective cover; 23. top plate; 24. rotating seat; 25. first cushion block; 26. second cushion block; 27. second bevel gear; 28. first bevel gear; 29. ​​bearing seat; 30. transmission shaft; 31. driving motor. DETAILED DESCRIPTION

[0027] 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.

[0028] In one embodiment, see Figure 1-Figure 12 , a tomato seedling soil screening machine, comprising a disc seat 1, a screening mechanism 2 and a striking mechanism 3;

[0029] The screening mechanism 2 includes a first diagonal support rod 4 and a second diagonal support rod 8 arranged on the disc seat 1. The disc seat 1 is an annular structure that can be directly placed on the ground. Three first diagonal support rods 4 and three second diagonal support rods 8 are arranged on the disc seat 1. The first diagonal support rod 4 is arranged on the outer ring of the disc seat 1. The first diagonal support rod 4 extends in a direction away from the center of the disc seat 1, that is, the first diagonal support rod 4 is in a state of being opened outward. A first fixing ring 5 is arranged on the first diagonal support rod 4. The lower surface of the first fixing ring 5 is connected to the upper end of the screening rope 6, and the screening rope 6 is relative to the first fixing ring 5. The central circumference is symmetrical and evenly distributed, a counterweight ball 7 is arranged at the lower end of the screening rope 6, and the screening rope 6 is hung downward by the counterweight ball 7, and the second oblique support rod 8 is tilted and extended toward the center of the disc seat 1, that is, the upper ends of the second oblique support rods 8 are in a mutually retracted state, and a second fixing ring 9 is arranged at the upper end of the second oblique support rod 8, and a conical material guide barrel 10 is coaxially arranged inside the second fixing ring 9, and the upper end of the conical material guide barrel 10 is an open end with a large diameter, and the screening rope 6 can pass through the gap between the conical material guide barrel 10 and the second fixing ring 9 from top to bottom;

[0030] The striking mechanism 3 includes an oblique support rod 16 arranged on the rear side of the disc seat 1, the oblique support rod 16 is inclined toward the rear and upper side, and a front-to-rear extension beam 17 is arranged above the oblique support rod 16. The end of the extension beam 17 is rotatably connected to a rotating shaft 19 arranged perpendicular to the extension beam 17, and a striking paddle 20 is arranged outside the rotating shaft 19.

[0031] In one case of the present embodiment, the first fixing ring 5 is higher than the second fixing ring 9, and the diameter of the first fixing ring 5 is larger than the diameter of the second fixing ring 9. Therefore, when the screening rope 6 moves from the second fixing ring 9 to the position of the first fixing ring 5, the screening rope 6 also forms a funnel-shaped structure with a larger upper opening, so that the soil will slide after hitting the screening rope 6, and in order to avoid leakage, the spacing of the screening ropes 6 can be set to be smaller. At the same time, due to the conical state, the spacing of the upper screening ropes 6 is larger, and the spacing of the lower screening ropes 6 is smaller. In actual work, soil blocks and stones will collide with the striking blades 20 respectively. If the soil blocks collide with the striking blades 20, the soil blocks will be crushed. At this time, the splitting of the soil blocks will absorb kinetic energy, so that the crushed soil particles will move parabolically at a state with a smaller initial velocity, and the soil particles will drop to a larger height and contact the screening rope 6 below. At this time, the screening rope 6 will block the soil particles. The screen rope 6 will continue to move, and the screening rope 6 will be slightly deformed to achieve the effect of unloading force. The soil particles will slide down along the screening rope 6. The initial velocity of most soil particles is not enough and they will fall directly into the inside of the conical guide barrel 10. However, when the stone contacts the striking blade 20, the stone will be knocked away. At this time, the initial velocity of the stone is greater than the initial velocity of the soil particles, and the momentum is greater, so that the stone will contact the screening rope 6 with a larger gap above. Some stones will directly pass through the gap of the upper screening rope 6, and the other stones will push the screening rope 6 away after directly contacting the screening rope 6. At this time, the screening rope 6 will deform adaptively, allowing the stone to pass through. After the stone passes through, the screening rope 6 will be in a taut state again at the center of the counterweight ball 7, and if the stone hits the screening rope 6 head-on and is blocked and rebounds back, the stone will fall again and contact the striking blade 20 below again, and then be knocked away again, thereby achieving the separation effect. The inner circle of the second fixing ring 9 is an arc surface, so that the screening rope 6 will not be scratched when it slides relative to the second fixing ring 9, and a connecting cross bar 13 is provided on the inner circle of the second fixing ring 9, and the outer part of the conical guide barrel 10 is fixed by the connecting cross bar 13, so that the conical guide barrel 10 can be stably placed vertically, and the screening rope 6 only needs to avoid the connecting cross bar 13. In addition, the soil will also contain some leaves or branches. Since the leaves and branches are large in size and will not be crushed, the leaves and branches will hit the screening rope 6 but cannot pass through, so the leaves and branches will eventually be mixed with the soil to achieve a certain biofertilizer effect. These are small leaves and branches. In the process of soil excavation, large leaves and branches and even large stones can be easily separated and only need to be manually removed, which will not affect the normal operation of the striking blade 20.

[0032] In one case of the present embodiment, the center lines of the first fixing ring 5, the second fixing ring 9 and the conical material guide barrel 10 are colinearly arranged, the end of the conical material guide barrel 10 is higher than the second fixing ring 9, and the diameter of the upper end of the conical material guide barrel 10 is larger than the inner diameter of the second fixing ring 9. Therefore, the bottom of the screening rope 6 will contact the outer edge of the upper end of the conical material guide barrel 10. At this time, the soil particles sliding along the screening rope 6 will directly fall into the conical material guide barrel 10, thereby achieving the effect of diversion, and a discharge pipe 11 is connected to the lower end opening of the conical material guide barrel 10, and a soil storage box is placed at the outlet of the discharge pipe 11, so that the screened soil will fall into the soil storage box through the discharge pipe 11, which is convenient for subsequent collection and processing.

[0033] In one case of this embodiment, the end of the first diagonal support rod 4 is detachably connected with a support ring 15, the support ring 15 is provided with a slot that cooperates with the end of the first diagonal support rod 4, and the support ring 15 is provided with a protective cloth 14 that is sleeved on the outside of the first fixing ring 5. After the support ring 15 is placed on the upper end of the first diagonal support rod 4 from top to bottom, the first diagonal support rod 4 will be inserted into the slot, thereby achieving the effect of detachable connection, and at this time, the protective cloth 14 with an annular structure will cover the outside of the entire screening machine. When the stone is knocked outward, the stone will hit the inside of the protective cloth 14, and then fall to the ground along the protective cloth 14, thereby avoiding the stone flying to the outside and causing safety hazards, and the falling stone also has a collection effect, which is convenient for the subsequent cleaning of the screened stones. At the same time, a hook 12 is set on the side above the first diagonal support rod 4, and the first fixing ring 5 is directly placed on the hook 12, so that the first fixing ring 5 can also be detachably connected to the first diagonal support rod 4, so as to facilitate the removal of the overall screening rope 6 for cleaning or maintenance.

[0034] In one case of this embodiment, a top plate 23 is provided at the end of the diagonal brace 16, and the top plate 23 is arranged in a front-to-back direction. The rear end of the top plate 23 is fixedly connected to the upper end of the diagonal brace 16, and the front end of the top plate 23 is provided with a rotating seat 24, which is rotatably connected to the surface of the extended beam 17. Since the extended beam 17 will flip and affect the direction description, the subsequent description is as follows. Figure 3The positional relationship of the extending beam 17 can be described, and the extending beam 17 can be designed as a T-shaped structure, and a protrusion is set at the rear end of the upper surface of the extending beam 17, and the protrusion is connected to the rotating seat 24, so that after the extending beam 17 is rotated to the front side, the upper surface of the extending beam 17 will be attached to the lower surface of the top plate 23, and when the extending beam 17 is flipped backward, the lower surface of the extending beam 17 will be attached to the upper surface of the top plate 23, so that the extending beam 17 can still remain in a stable state after flipping without shaking, and in order to avoid In order to prevent the rigid collision after flipping, a first pad 25 is provided at the rear end of the upper surface of the extending beam 17. When the extending beam 17 flips to the front side, the upper surface of the first pad 25 will contact the lower surface of the top plate 23 to achieve a buffering effect. The rotating shaft 19 will vibrate during the rotation, so that the first pad 25 has a certain shock-absorbing effect. A second pad 26 is provided on the rear side of the upper surface of the top plate 23. When the extending beam 17 flips backward, the extending beam 17 falls on the second pad 26 to achieve a buffering effect.

[0035] In one case of the present embodiment, a conical protective cover 21 is provided at the upper end of the rotating shaft 19, and a triangular protective cover 22 is provided on the upper surface of the extending beam 17. Both the triangular protective cover 22 and the conical protective cover 21 play a certain diversion effect. After the soil falls on the upper part, it will slide outward and will not form accumulation. The conical protective cover 21 and the triangular protective cover 22 also play a certain crushing effect. When soil blocks fall on the sharp corners of the conical protective cover 21 or the upper end of the triangular protective cover 22, the soil blocks will be broken, thereby achieving a certain effect of crushing soil blocks. A transmission protective cover 18 is provided below the extending beam 17, and a power drive device of the rotating shaft 19 is provided inside the transmission protective cover 18. The transmission protective cover 18 is used to avoid Soil particles and other debris enter the transmission components, affecting the normal rotation effect. The driving device includes a bearing seat 29 arranged on the front and rear sides of the lower surface of the extended beam 17. The bearing seat 29 is rotatably connected to a transmission shaft 30 arranged in a front-to-rear direction. The front end of the transmission shaft 30 is fixedly connected to the first bevel gear 28, and the first bevel gear 28 is meshed with the second bevel gear 27. The second bevel gear 27 is fixedly connected to the top of the rotating shaft 19, and a driving motor 31 is arranged on the rear side of the lower surface of the extended beam 17. The output shaft of the driving motor 31 is fixedly connected to the rear end of the driving shaft 30. Therefore, the driving motor 31 can drive the rotating shaft 19 to rotate by gear transmission, thereby rotating the striking blade 20 below.

[0036] In one case of this embodiment, striking blades 20 are provided at different heights of the rotating shaft 19, and the striking blades 20 are arc-shaped structures, and the middle part of the striking blades 20 protrudes toward the direction of rotation of the rotating shaft 19. Five striking blades 20 are provided at the same height and are symmetrically arranged relative to the axis of the rotating shaft 19, and the orientation angles of the upper and lower adjacent striking blades 20 are different, so as to prevent stones from directly passing through the gaps between the striking blades 20 and not being knocked away. The striking blades 20 are designed to be an arc-shaped structure, so that when the stone falls and contacts the striking blades 20, the striking force given to the stone by the striking blades 20 is directed away from the center of the conical guide barrel 10, so that the stone can be better knocked away to achieve the separation effect.

[0037] During the implementation of this embodiment, the disc seat 1 is stably placed on the ground, and a heavy object can be pressed on the disc seat 1 to ensure the stability of the screening machine during operation, and a container for storing soil is placed at the lower end of the discharge pipe 11. At this time, the entire device is ready, and the drive motor 31 is started. The drive motor 31 drives the striking blade 20 to rotate through the rotating shaft 19. At this time, the soil to be screened is poured from top to bottom on top of the conical protective cover 21.

[0038] The process of soil blocks being hit is described as follows: during the falling process of the soil, the soil blocks are crushed for the first time by the conical protective cover 21 and the triangular protective cover 22. When the soil continues to fall and contacts the rotating striking blades 20, the soil blocks are crushed for the second time by the striking blades 20. The crushing absorbs energy, so that the soil particles after the soil blocks are crushed move along a parabola with a smaller initial velocity. The soil particles directly fall on the inner wall of the conical material guide barrel 10, or the soil particles with a smaller speed fall on the lower position of the screening rope 6. The screening rope 6 is slightly deformed to absorb energy again. The soil particles slide down with the screening rope 6 and still slide into the inside of the conical material guide barrel 10, and finally the soil particles will be discharged into the storage container through the discharge pipe 11 along with the conical material guide barrel 10.

[0039] The process of the stone being struck is described as follows: when the stone falls and contacts the striking blade 20, the striking blade 20 and the stone collide rigidly. At this time, if the stone is relatively loose in texture, it will be broken into small particles. The small particles fall and are discharged with the soil. The small particles of stone will not affect the growth of tomato seedlings. The hard stones will not be broken, so the hard stones will be knocked outward by the striking blade 20. At this time, the stone moves outward according to the parabolic motion with a larger initial velocity to the top of the screening rope 6. At this time, if it happens to be between two adjacent screening ropes 6, the stone will directly pass through and hit the protective cloth 14. And it falls again. If the stone contacts the screening rope 6, the screening rope 6 will be pushed away by the stone with larger inertia and faster speed. At this time, the stone will still pass through the restriction of the screening rope 6 and contact the protective cloth 14. If the angle is just vertical, the screening rope 6 will bounce the stone back. At this time, the stone will collide with the striking blade 20 below again, and the stone will be knocked away again. After being knocked away many times, most of the stones will be ejected to the outside of the screening rope 6 to achieve the screening effect, and when the stone is separated from the screening rope 6, the screening rope 6 will return to its straight state again under the action of the counterweight ball 7.

[0040] The process of leaves or branches being hit is described as follows: since leaves or branches cannot be broken by the hitting blades 20, but the leaves or branches are slightly larger in size and lighter in weight, the air flow resistance encountered by the leaves or branches after being hit will be greater, and the leaves and branches will fall to the lower position of the screening rope 6 and be easily blocked. At the same time, since the leaves or branches themselves are lighter in weight, it is more difficult to knock open the screening rope 6. After the screening rope 6 is deformed and absorbs energy, the leaves or branches will slide along with the screening rope 6 into the interior of the conical material guide barrel 10 and mix in the soil.

[0041] To sum up, very large stones, leaves or branches are very obvious, and they are small in number and large in size, so they are easy to distinguish. They will be removed when soil is collected. A small number of leaves and branches will be screened together with the soil and can be used as biological fertilizer after decomposition. Only hard stones will be screened out, thus preventing large stones from affecting the normal growth of tomato seedlings.

[0042] The present invention is suitable for a tomato seedling soil screening machine. The rotating striking blades 20 are designed to knock away stones mixed in the soil, thereby achieving a soil screening effect. In the screening process, the striking blades 20 are also used to break up agglomerated soil blocks, which is convenient for subsequent soil planting of tomato seedlings.

[0043] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A tomato seedling soil screening machine, characterized in that: It includes a disc seat, a screening mechanism and a striking mechanism; The screening mechanism comprises a first oblique support rod and a second oblique support rod arranged on the disc seat, the first oblique support rod extending in a direction away from the center of the disc seat, a first fixing ring being arranged on the first oblique support rod, a screening rope being arranged on the side of the first fixing ring, a counterweight ball being connected to the free end of the screening rope, the second oblique support rod extending obliquely in the direction of the center of the disc seat, a second fixing ring being arranged at the end of the second oblique support rod, a conical material guide barrel being arranged in the middle of the second fixing ring, the screening rope passing through a gap between the conical material guide barrel and the second fixing ring, the first fixing ring being higher than the second A fixing ring, wherein the diameter of the first fixing ring is larger than the diameter of the second fixing ring, the inner wall of the second fixing ring is an arc surface, the inner ring of the second fixing ring is provided with a connecting cross bar fixedly connected to the conical material guide barrel, the center lines of the first fixing ring, the second fixing ring and the conical material guide barrel are arranged in a colinear manner, the end of the conical material guide barrel is higher than the second fixing ring, the diameter of the upper end of the conical material guide barrel is larger than the inner diameter of the second fixing ring, a discharge pipe is provided at the lower end of the conical material guide barrel, and the screening ropes form a funnel-shaped structure with a larger opening at the top, the spacing of the upper screening ropes is larger, and the spacing of the lower screening ropes is smaller; The striking mechanism comprises an oblique support rod arranged on the side of the disc seat, an extended beam is arranged above the oblique support rod, the end of the extended beam is rotatably connected with a rotating shaft, and a striking blade is arranged outside the rotating shaft.

2. A tomato seedling soil screening machine according to claim 1, characterized in that: The end of the first diagonal support rod is detachably connected to a support ring, the support ring is provided with a slot matched with the end of the first diagonal support rod, and the support ring is provided with a protective cloth sleeved on the outside of the first fixing ring.

3. A tomato seedling soil screening machine according to claim 1, characterized in that: A hook is provided on the side surface of the first diagonal support rod, and the hook is detachably connected to the first fixing ring.

4. A tomato seedling soil screening machine according to claim 1, characterized in that: A top plate is provided at the end of the diagonal support rod, a rotating seat is provided at the end of the top plate, the rotating seat is rotatably connected to the side of the extended beam, a first pad matching with the top plate is provided at the end of the extended beam, and a second pad matching with the extended beam is provided on the top plate.

5. A tomato seedling soil screening machine according to claim 4, characterized in that: A conical protective cover is arranged at one end of the rotating shaft away from the striking blade, a triangular protective cover is arranged at one side of the extending beam close to the conical protective cover, and a transmission protective cover is arranged at one side of the extending beam away from the conical protective cover.

6. A tomato seedling soil screening machine according to claim 5, characterized in that: A bearing seat fixedly connected to the extended beam is arranged inside the transmission protective cover, and a transmission shaft is rotatably connected to the bearing seat. A first bevel gear is arranged at one end of the transmission shaft close to the rotating shaft, and the first bevel gear is meshedly connected to the second bevel gear. The second bevel gear is fixed to the beam connected to the rotating shaft, and a driving motor is arranged at the end of the extended beam, and an output shaft of the driving motor is fixedly connected to the end of the transmission shaft.

7. A tomato seedling soil screening machine according to claim 1, characterized in that: The rotating shaft is provided with striking blades at different heights. The striking blades are arc-shaped structures, and the middle parts of the striking blades protrude toward the direction of rotation of the rotating shaft.

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