阅读说明：本技术 一种水田栽秧前的机械性手推式翻土装置 (Mechanical hand-push type soil turning device used before paddy field seedling planting ) 是由 不公告发明人 于 2021-09-26 设计创作，主要内容包括：本发明公开了一种水田栽秧前的机械性手推式翻土装置,包括连接推杆,所述连接推杆的两端均设有连接柱,所述连接柱一端均设有U型支撑板,所述U型支撑板的顶部U型槽内均设有移动板,所述移动板的底部设有对称式的斜面压板,所述移动板且远离所述U型支撑板的一侧均设有驱动部,所述U型支撑板的相对应侧边底部分别设有防水电机二和固定块,所述防水电机二与所述固定块之间设有中心连接轴,所述中心连接轴的中部设有翻土机构。有益效果：大大的降低了工作难度,提高了工作效率,减轻农民的劳动力。(The invention discloses a mechanical hand-push type soil turning device used before paddy field seedling planting, which comprises a connecting push rod, wherein connecting columns are arranged at two ends of the connecting push rod, U-shaped supporting plates are arranged at one ends of the connecting columns, a moving plate is arranged in a U-shaped groove at the top of each U-shaped supporting plate, symmetrical inclined plane pressing plates are arranged at the bottom of each moving plate, a driving part is arranged at one side of each moving plate, which is far away from the U-shaped supporting plate, a waterproof motor II and a fixed block are respectively arranged at the bottom of the corresponding side edge of each U-shaped supporting plate, a central connecting shaft is arranged between each waterproof motor II and the fixed block, and a soil turning mechanism is arranged in the middle of each central connecting shaft. Has the advantages that: greatly reduces the work difficulty, improves the work efficiency and lightens the labor force of farmers.)

1. The utility model provides a mechanical nature hand propelled device that digs before paddy field transplants rice seedlings, a serial communication port, including connecting rod (1), the both ends of connecting rod (1) all are equipped with spliced pole (2), spliced pole (2) one end all is equipped with U type backup pad (3), the top U type inslot of U type backup pad (3) all is equipped with movable plate (4), the bottom of movable plate (4) is equipped with inclined plane clamp plate (5) of symmetry formula, movable plate (4) and keep away from one side of U type backup pad (3) all is equipped with the drive division, the corresponding side bottom of U type backup pad (3) is equipped with waterproof motor two (6) and fixed block (7) respectively, waterproof motor two (6) with be equipped with central connecting axle (8) between fixed block (7), the middle part of central connecting axle (8) is equipped with the mechanism that digs.

2. The mechanical hand-push type soil turning device used before paddy field seedling planting is characterized in that the moving plate (4) is arranged to be an inverted L-shaped structural plate, wherein a cylinder (9) is arranged at the center of the lower portion of the moving plate (4) and located on the same side edge of the U-shaped supporting plate (3), one side, close to the moving plate (4), of the cylinder (9) is fixedly connected with one side of the center of the top of the inclined plane pressing plate (5) through an elastic supporting plate (10), and the outer end of the bottom of the cylinder (9) is fixedly connected with the top of the inclined plane pressing plate (5) through an elastic piece (11).

3. The mechanical hand-push type soil turning device used before paddy field seedling planting is characterized in that a spiral structural groove (12) is formed in the center of the upper portion of one side, far away from the U-shaped supporting plate (3), of the moving plate (4), and gear grooves (13) communicated with each other are formed in the bottoms of the spiral structural grooves (12); the drive division is including falling L template (14), the one end of falling L template (14) is all fixed the side one of U type backup pad (3) is served, fall L template (14) and keep away from the bottom of U type backup pad (3) one side all is equipped with fixed plate (15), fixed plate (15) and keep away from the other end of falling L template (14) one side all is equipped with actuating lever (16), actuating lever (16) other end just is located the tip of the same one side of fixed plate (15) all is equipped with actuating arm (17), actuating arm (17) just keep away from all be equipped with on the other end of actuating lever (16) one side with gear two (18) of gear groove (13) looks adaptation, just gear two (18) imbeds in gear groove (13).

4. The mechanical hand-push type soil turning device used before paddy field seedling planting is characterized in that a rotating shaft (19) is arranged above each second gear (18), the right end of the surface of each rotating shaft (19) is sleeved with a second spiral structure (20) meshed with the second gear (18), the second spiral structures (20) are embedded into the spiral structure grooves (12), the left end of each rotating shaft (19) penetrates through the inverted L-shaped plate (14) and extends to the other side of the inverted L-shaped plate (14), and the input end of each rotating shaft is connected with a first waterproof motor (21).

5. The mechanical hand-push type soil turning device used before paddy field seedling planting according to claim 1, characterized in that the soil turning mechanism comprises a soil turning wheel (22), the soil turning wheel (22) is sleeved on the middle part of the central connecting shaft (8), a plurality of fixing rods (23) are arranged on the circumferences of both sides of the soil turning wheel (22), fan wheels (24) protruding outwards are sleeved on the middle parts of the fixing rods (23), at least three fan wheels (24) are arranged on both sides, a group of support plates (25) are arranged between the group of fan wheels (24) on one side, a wheel shaft I is arranged between the support plates (25), a gear I (26) and a limit cam (27) are respectively sleeved on the wheel shaft I, a limit wheel I (28) matched with the limit cam (27) is arranged on one side of the limit cam (27) far away from the soil turning wheel (22), the middle of the first limiting wheel (28) is inserted with a second wheel shaft, two ends of the second wheel shaft are respectively provided with a first supporting plate (29), a push plate (30) is arranged between the first supporting plate (29) and one side far away from the limiting cam (27), and one end of the push plate (30) is sleeved on one end of the surface of the central connecting shaft (8) and close to the second waterproof motor (6).

6. A mechanical hand-push type soil turning device used before paddy field seedling planting is characterized in that a first spiral structure (31) meshed with the first gear (26) is arranged on the surface of the central connecting shaft (8) and between the push plate (30) and the soil turning wheel (22).

7. The mechanical hand-push type soil turning device used before paddy field seedling planting is characterized in that the cross section size of the outer end of the fan wheel (24) is smaller than that of the inner end of the fan wheel (24), and a bearing sleeve is arranged between the soil turning wheel (22) and the central connecting shaft (8) in a contact mode.

8. The mechanical hand-push type soil turning device used before paddy field seedling planting is characterized in that a convex plate (32) is arranged in the middle of the outer side of the connecting push rod (1), mounting pieces (33) are arranged at two ends of the bottom of the connecting push rod (1), a roller shaft (34) is arranged between the mounting pieces (33) at two ends in a transverse mode, a roller curtain baffle (35) is wound on the roller shaft (34), a hammer plate (36) is arranged at the bottom of the roller curtain baffle (35), and a pull rope (37) capable of lifting the roller curtain baffle (35) is arranged at one end of the roller shaft (34).

Technical Field

The invention relates to the technical field of agricultural mechanical equipment, in particular to a mechanical hand-push type soil turning device used before paddy field seedling planting.

Background

Before planting rice and transplanting rice, soil in a paddy field needs to be turned over, the turned soil needs to be leveled, in the prior art, a plough for ploughing is tied on a cattle body firstly, the soil is turned over by the plough through driving the cattle, then tools are replaced, a plate is pulled by farmers, and the turned-over soil is leveled while the plate is pulled. When more in the field or older peasant planted, this kind of operation of digging and flattening brought very big difficulty to great increase labour's expenditure lets the peasant plant the seedling in-process more easily at the back and causes tired sense, consequently urgently needs a mechanical hand propelled device that digs before paddy field plants to replace the operation of digging of current ox plough field.

Disclosure of Invention

The technical task of the invention is to provide a mechanical hand-push type soil turning device before paddy field seedling planting to solve the problems.

The technical scheme of the invention is realized as follows:

the utility model provides a mechanical hand propelled device that digs before paddy field transplants rice seedlings, includes connecting rod, connecting rod's both ends all are equipped with the spliced pole, spliced pole one end all is equipped with U type backup pad, the top U type inslot of U type backup pad all is equipped with the movable plate, the bottom of movable plate is equipped with the inclined plane clamp plate of symmetry formula, the movable plate just keeps away from one side of U type backup pad all is equipped with the drive division, the corresponding side bottom of U type backup pad is equipped with waterproof motor two and fixed block respectively, waterproof motor two with be equipped with the central connecting axle between the fixed block, the middle part of central connecting axle is equipped with the mechanism that digs.

Preferably, the movable plate is an inverted-L-shaped structural plate, wherein the movable plate is located at the center of the lower portion of the same side edge of the U-shaped support plate, a cylinder is arranged at the center of the lower portion of the same side edge of the U-shaped support plate, the cylinder is close to one side of the movable plate and fixedly connected with one side of the center of the top of the inclined plane pressing plate through an elastic support plate, and the outer end of the bottom of the cylinder is fixedly connected with the top of the inclined plane pressing plate through an elastic piece.

Preferably, the center of the upper part of one side of the moving plate, which is far away from the U-shaped supporting plate, is provided with a spiral structural groove, and the bottoms of the spiral structural grooves are provided with gear grooves communicated with each other; the drive division is including falling the L template, the one end of falling the L template is all fixed the side one of U type backup pad is served, fall the L template and keep away from the bottom of U type backup pad one side all is equipped with the fixed plate, the fixed plate just keeps away from the other end of falling L template one side all is equipped with the actuating lever, the actuating lever other end just is located the tip of fixed plate looks one side all is equipped with the actuating arm, the actuating arm just keeps away from all be equipped with on the other end of actuating lever one side with gear groove phase adaptation's gear two, just gear two imbeds the gear inslot.

Preferably, rotating shafts are arranged above the second gears, the right ends of the surfaces of the rotating shafts are respectively sleeved with a second spiral structure which is meshed with the second gears, the second spiral structures are embedded into grooves of the spiral structures, the left ends of the rotating shafts penetrate through the inverted L-shaped plates and extend to the other sides of the inverted L-shaped plates, and input ends of the rotating shafts are respectively connected with a first waterproof motor.

Preferably, the soil turning mechanism comprises a soil turning wheel, the soil turning wheel is sleeved in the middle of the central connecting shaft, a plurality of fixed rods are arranged on the circumference of both sides of the soil turning wheel, fan wheels protruding outwards are sleeved in the middle of the fixed rods, wherein, the fan wheels arranged at the two sides are at least three, a group of support plates II are arranged between a group of fan wheels positioned at one side, a first wheel shaft is arranged between the support plates II, a first gear and a limiting cam are respectively sleeved on the first wheel shaft, one side of the limiting cam, which is far away from the soil turning wheel, is provided with a first limiting wheel matched with the limiting cam, a second wheel shaft is inserted in the middle of the first limiting wheel, two ends of the second wheel shaft are provided with first supporting plates, and a push plate is arranged between one sides of the first support plate and far away from the limiting cam, and one end of the push plate is sleeved on the surface of the central connecting shaft and close to one end of the second waterproof motor.

Preferably, a first spiral structure meshed with the first gear is arranged on the surface of the central connecting shaft and between the push plate and the soil turning wheel.

Preferably, the cross section of the outer end of the fan wheel is smaller than that of the inner end of the fan wheel, and a bearing sleeve is arranged between the soil turning wheel and the central connecting shaft in a contact mode.

Preferably, the middle part of the outer side of the connecting push rod is provided with a convex plate, the two ends of the bottom of the connecting push rod are respectively provided with a mounting part, a roller shaft is transversely arranged between the mounting parts at the two ends, a roller curtain baffle is wound on the roller shaft, the bottom of the roller curtain baffle is provided with a hammer plate, and one end of the roller shaft is provided with a pull rope capable of lifting the roller curtain baffle.

Compared with the prior art, the invention has the advantages and positive effects that:

1. the soil turning device has the advantages that the connecting push rod with the inverted U-shaped structure is arranged, the same movable driving parts are arranged at the two ends of the connecting push rod, the driving parts are driven to drive the inclined plane pressing plates at the bottom to achieve the scraping function in a paddy field, soil is turned in the paddy field by driving the soil turning mechanism at the middle part, then the soil is scraped through the inclined plane pressing plates at the two ends and the hammer plate behind the soil turning mechanism, so that the labor difficulty and labor force caused by the existing manual operation are effectively solved, farmers do not need to drive cattle to plow the paddy field, the paddy field can be turned in the rotating process of the soil turning mechanism at the middle part directly when the farmers hold the convex plate to walk, the paddy field is pressed to be leveled accordingly, the working procedures of replacing farm tools by the existing farmers and pulling the pressing plates to walk in the paddy field are reduced, the working difficulty is greatly reduced, and the working efficiency is improved, the labor force of farmers is reduced.

2. The soil turning device has the advantages that the running directions of the driving parts arranged at the two ends are opposite or opposite, namely, the driving parts move towards the two sides or the middle simultaneously, wherein the top of the inclined plane pressing plate is connected with the cylinder through the elastic piece to promote the elastic action of the elastic piece, so that the inclined plane pressing plate can generate a micro vibration displacement action in the moving process, cement soil in a rice field can be compacted and leveled in the vibration process, the later rice planting is facilitated, in addition, the liftable roller shutter baffle plate arranged at the center of the bottom of the connecting push rod can play a role in blocking soil after being pulled down, the soil brought up by the soil turning rotation is conveniently and effectively blocked in the soil turning operation process, the soil brought up by the turning rotation is prevented from being stained on clothes of farmers, and the soil brought up by the turning is blocked at the same time, alleviate the resistance of peasant's walking in the paddy field, simultaneously, the hammer leaf of bottom still can play the effect of hammering the crushing to the earth that turns over out.

3. The soil turning device is provided with a soil turning mechanism on a central connecting shaft, wherein a plurality of fan wheels are arranged at the positions, far away from the circumference, of two sides of each soil turning wheel, and the number of the fan wheels on each side is not less than three, so that the fan wheels arranged on the two sides can rotate along with the rotation of the soil turning wheels after the soil turning wheels rotate, and then the soil turning function of soil on the sides can be realized through the fan wheels, so that the sponginess of the soil is increased, then the matched limit wheel I is propped against the limit cam on the side edge in the rotation process of the soil turning wheels, a push plate at one end is driven by the limit wheel to generate small left and right movement on the rotating side edge of the central connecting shaft, so that the soil turned out is pushed towards the side edge by the drive plate, and the inclined plane press plate on the side edge is convenient to press, and after the soil turning wheel rotates to the upper part, the soil turning wheel is just close to the soil turning wheel, so that the area of soil diffusion brought by the soil turning wheel is reduced.

4. According to the soil turning device, the roller shutter baffle arranged at the bottom of the connecting push rod adopts the structure of a traditional curtain, the roller shutter can be rolled up when not in work, and the roller shutter baffle can be pulled down after work for shielding and hammering and scraping. In addition, the device provided by the scheme has a small size, is convenient for people to carry and use, is simple to operate and is convenient for farmers to operate.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a front perspective view of an embodiment in accordance with the present invention;

FIG. 2 is a schematic view of a shutter blind end configuration according to an embodiment of the present invention;

FIG. 3 is a schematic view of a connecting rod end structure according to an embodiment of the present invention;

FIG. 4 is a perspective view of a turn-up mechanism according to an embodiment of the present invention;

fig. 5 is a plan view of a turn-up mechanism according to an embodiment of the present invention.

In the figure:

1. connecting a push rod; 2. connecting columns; 3. a U-shaped support plate; 4. moving the plate; 5. a bevel pressing plate; 6. a waterproof motor II; 7. a fixed block; 8. a central connecting shaft; 9. a cylinder; 10. an elastic support plate; 11. an elastic member; 12. a helical structural groove; 13. a gear groove; 14. an L-shaped plate is inverted; 15. a fixing plate; 16. a drive rod; 17. a drive arm; 18. a second gear; 19. a rotating shaft; 20. a second spiral structure; 21. a waterproof motor I; 22. a soil turning wheel; 23. fixing the rod; 24. a fan wheel; 25. a support plate II; 26. a first gear; 27. a limiting cam; 28. a first limiting wheel; 29. a first support plate; 30. pushing the plate; 31. a first spiral structure; 32. a convex plate; 33. a mounting member; 34. a roll shaft; 35. a roller shutter; 36. a hammer plate; 37. and pulling a rope.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, the present invention will be further described with reference to the accompanying drawings and examples. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

The invention is further described with reference to the following figures and specific examples.

According to an embodiment of the invention, as shown in fig. 1-5:

the invention provides a mechanical hand-push type soil turning device used before paddy field seedling planting, which comprises a connecting push rod 1, wherein connecting columns 2 are arranged at two ends of the connecting push rod 1, U-shaped supporting plates 3 are arranged at one ends of the connecting columns 2, a moving plate 4 is arranged in a U-shaped groove at the top of each U-shaped supporting plate 3, symmetrical inclined plane pressing plates 5 are arranged at the bottom of each moving plate 4, a driving part is arranged at one side of each moving plate 4 far away from the U-shaped supporting plate 3, a waterproof motor II 6 and a fixed block 7 are arranged at the bottom of the corresponding side edge of each U-shaped supporting plate 3 respectively, a central connecting shaft 8 is arranged between each waterproof motor II 6 and the corresponding fixed block 7, and a soil turning mechanism is arranged in the middle of each central connecting shaft 8.

Wherein, according to being shown in fig. 2, movable plate 4 sets up to falling L type structural slab, wherein, movable plate 4 just is located the lower part center department of the same side of U type backup pad 3 all is equipped with cylinder 9, cylinder 9 just is close to 4 one side of movable plate through elastic support plate 10 with top center one side of inclined plane clamp plate 5 carries out fixed connection, just the bottom outer end of cylinder 9 all through elastic component 11 with the top fixed connection of inclined plane clamp plate 5, connecting rod 1 outside middle part is equipped with flange 32, connecting rod 1's bottom both ends all are equipped with installed part 33, and the crossing is equipped with roller 34 between the both ends installed part 33, the winding has a roll curtain baffle 35 on the roller 34, the bottom of rolling curtain baffle 35 is equipped with hammer block 36, roller 34 one end is equipped with the liftable roll curtain baffle 35's stay cord 37. As shown in fig. 1, the center of the upper part of one side of the moving plate 4, which is far away from the U-shaped support plate 3, is provided with a spiral groove 12, and the bottoms of the spiral grooves 12 are provided with gear grooves 13 communicated with each other; the driving part comprises an inverted L-shaped plate 14, one end of the inverted L-shaped plate 14 is fixed at one end of the side edge of the U-shaped supporting plate 3, a fixing plate 15 is arranged at the bottom of the inverted L-shaped plate 14 far away from one side of the U-shaped supporting plate 3, a driving rod 16 is arranged at the other end of the fixing plate 15 far away from one side of the inverted L-shaped plate 14, a driving arm 17 is arranged at the other end of the driving arm 16 and at the end part of the same side of the fixing plate 15, a second gear 18 matched with the gear groove 13 is arranged at the other end of the driving arm 17 far away from one side of the driving arm 16, the second gear 18 is embedded in the gear groove 13, a rotating shaft 19 is arranged above the second gear 18, a second spiral structure 20 meshed with the second gear 18 is sleeved at the right end of the surface of the rotating shaft 19, wherein the second spiral structure 20 is embedded in the spiral structure groove 12, the left end of the rotating shaft 19 penetrates through the inverted L-shaped plate 14 and extends to the other side of the inverted L-shaped plate 14, and the input end of the rotating shaft is connected with a first waterproof motor 21.

Secondly, as shown in fig. 4-5, the soil turning mechanism comprises a soil turning wheel 22, the soil turning wheel 22 is sleeved in the middle of the central connecting shaft 8, a plurality of fixing rods 23 are circumferentially arranged on both sides of the soil turning wheel 22, fan wheels 24 protruding outwards are sleeved in the middle of the fixing rods 23, at least three fan wheels 24 are arranged on both sides, a group of support plates two 25 are arranged between the group of fan wheels 24 positioned on one side of the soil turning wheel, a wheel shaft one is arranged between the support plates two 25, a gear one 26 and a limit cam 27 are respectively sleeved on the wheel shaft one, a limit wheel one 28 matched with the limit cam 27 is arranged on one side of the limit cam 27 far away from the soil turning wheel 22, a wheel shaft two is arranged in the middle of the limit wheel one 28 in a penetrating manner, support plates one 29 are arranged at both ends of the wheel shaft two, a push plate 30 is arranged between the support plates one 29 and one side far away from the limit cam 27, a pot head of the push pedal 30 is established the surface of the central connecting shaft 8 is close to one of the waterproof motor two 6 is served, the surface of the central connecting shaft 8 is located the push pedal 30 with turn over and be equipped with between the soil wheel 22 with a helical structure 31 that 26 meshes mutually of gear, the outer end cross sectional dimension of fan wheel 24 all is less than the inner cross sectional dimension of fan wheel 24, turn over soil wheel 22 with be equipped with the bearing housing between the contact of central connecting shaft 8.

The detailed use method and action of the embodiment are as follows:

the device is placed in a paddy field, a controllable control key is installed on the top of a connecting push rod 1, a waterproof motor II 6 is driven to drive a central connecting shaft 8 to rotate, after the central connecting shaft 8 rotates, a soil turning wheel 22 sleeved in the middle of the central connecting shaft rotates along with the central connecting shaft, at the moment, a farmer holds a convex plate 32 pushing device to move forwards, soil turning operation is carried out on soil in the paddy field while the soil turning wheel 22 moves forwards, before that, one end of a pull rope 37 is pulled to drive a roller shaft 34 to rotate through the pull rope 37, a roller shutter baffle 35 wound on the roller shaft 34 is lowered until the bottom of the roller shutter baffle is contacted with soil on the surface of the paddy field, when the farmer pushes the convex plate 32 to move forwards, soil turned out by the front soil turning wheel 22 is just shielded by the roller shutter baffle 35, resistance of the soil to the farmer to move forwards is reduced, and meanwhile, the soil turned out by the soil turning wheel 22 is pressed to be flattened by a hammer plate 36, and the soil on two sides generated in the flattening process and the soil turning process is scraped under the movement of the inclined plane pressing plates 5 on two sides.

Wherein, drive the waterproof motor one 21, make the waterproof motor one 21 drive the rotating shaft 19 to rotate, make the rotating shaft 19 drive the helical structure two 20 that another end surface is set up and rotate, then drive the gear two 18 that the lower part is engaged with to rotate, after the gear two 18 rotates, the driving arm 17 of the middle part of side follows and rotates, therefore the driving arm 17 draws the driving lever 16 that the end connects, because another end of driving lever 16 connects on the side end of the fixed plate 15 movably, and the fixed plate 15 is fixed on the left end of side of the U-shaped shoe plate 3 through the inverted L-shaped plate 14, make after the gear two 18 rotates, drive the gear two 18 to move under the cooperation of rotation of driving arm 17 and driving lever 16, because the gear two 18 is imbedding in the side of the 4, thus draw the movable plate 4 to produce and move on the U-shaped movable plate shoe plate 3, and drive the rotating shaft 19 to pass one end of the inverted L-shaped plate 14 at the same time, and the moving plate 4 moves left and right, so that the bottom inclined pressing plate 5 realizes left and right moving type scraping operation on the soil surface in the paddy field when the moving plate 4 moves left and right, and the soil brought out by the turning wheel 22 is scraped under the inclined pressing plates 5 on the two sides.

Specifically, in the soil turning process, the soil turning wheel 22 rotates to drive the fan wheels 24 arranged on the side edges to rotate, wherein the convex surfaces of the fan wheels 24 are just embedded in soil, so that the fan wheels are matched with the soil turning wheel 22 to turn the soil, the soil turning wheel 22 always keeps rotating along the motion track in the backward and backward directions, that is, when facing the side edge of the first gear 26, the soil turning wheel 22 rotates clockwise, in the rotating process, the first gear 26 arranged on the side edge rotates under the meshing of the first spiral structure 31, so that the first gear shaft is driven to rotate, the first gear shaft drives the limiting cam 27 sleeved on the upper portion, the limiting cam 27 is arranged into an eccentric wheel structure, so that after the convex portion pushes against the first limiting wheel 28, the first limiting wheel 28 pushes the push plate 30 to move outwards on the central connecting shaft 8, at the moment, the push plate just rotates to the lower side, so that the soil turned out by the soil turning wheel 22 is pushed to the side edge by the push plate 30, the left inclined plane pressing plate 5 can be conveniently scraped, when the pushing plate 30 rotates along with the soil turning wheel 22 and is pushed to the upper position by the first gear 26, the concave surface of the limiting cam 27 is just in contact with the first limiting wheel 28, so that the pushing plate 30 is driven to approach one side of the soil turning wheel 22. The first limiting wheel 28 is just positioned on one side of the first gear 26, so that the first gear 26 is just pressed against the first limiting wheel 28 after rotating along with the soil turning wheel 22, and the push plate 30 moves left and right on the central connecting shaft 8.

The present invention can be easily implemented by those skilled in the art from the above detailed description. It should be understood, however, that the intention is not to limit the invention to the particular embodiments described. On the basis of the disclosed embodiments, a person skilled in the art can combine different technical features at will, thereby implementing different technical solutions.