CN114586534B

CN114586534B - A excavate recovery unit for crop stem stalk

Info

Publication number: CN114586534B
Application number: CN202210233919.XA
Authority: CN
Inventors: 黄继明
Original assignee: Xingtai Polytechnic College
Current assignee: Xingtai Polytechnic College
Priority date: 2022-03-10
Filing date: 2022-03-10
Publication date: 2023-03-31
Anticipated expiration: 2042-03-10
Also published as: CN114586534A

Abstract

The invention relates to the technical field of stalk recovery, in particular to an excavating and recovering device for crop stalks. The device comprises a movement mechanism, a stalk pulling mechanism, an extrusion mechanism and a soil cleaning mechanism. The stalk removing mechanism can primarily extrude the stalks and remove the soil adhered to the roots of the loose stalks when removing the stalks. The designed extrusion mechanism can flatten the stalks by extruding the stalks twice, thereby facilitating subsequent storage and drying. The stem stalk pulling mechanism can control the two cleaning assemblies to rotate by moving the movable seat, so that the cleaning effect is prevented from being reduced due to the fact that excessive sundries are adhered to the two cleaning assemblies.

Description

A excavate recovery unit for crop stem stalk

Technical Field

The invention relates to the technical field of stalk recovery, in particular to an excavating and recovering device for crop stalks.

Background

At present, in order to improve the land utilization rate, the interplanting of crops is more and more concerned by people, but if the stems of the previous crops cannot be recovered in time in the interplanting process, the growth of the next crops can be influenced, especially the interplanting of tobacco and sweet potatoes, if the stems of the tobacco cannot be pulled out in time after the tobacco leaves are harvested, the growth of the sweet potatoes can be influenced, the residual stems can absorb the soil fertility, the yield of the sweet potatoes is reduced, therefore, after the tobacco leaves are harvested, the stems can be pulled out in time to be beneficial to improving the yield value of the sweet potatoes, but the automation degree of the existing stem pulling device is low, the root systems of the tobacco stems are large, and if the tobacco leaves are not easy to store and a large amount of soil which can be brought up in the pulling out process.

Disclosure of Invention

In view of the above mentioned shortcomings of the prior art background, the present invention aims to provide a digging and recovering device for crop stalks.

The purpose of the invention can be realized by the following technical scheme:

the utility model provides an excavate recovery unit for crop stem stalk, pulls out mechanism, extrusion mechanism and clear native mechanism including motion, stem stalk, motion includes the mounting panel, and the mounting panel upper surface is close to the position on right side and opens there is the spout, and the position that the mounting panel upper surface is close to the middle part is opened there is the feed inlet, and the position that the mounting panel upper surface is close to the right side is opened there is the dust removal mouth, and mounting panel lower surface array distribution has four to remove the wheel, removes the wheel upper surface and is provided with the lift post, and mounting panel upper surface side is provided with the bin, is provided with the storage chamber in the bin, and it has the entry to open bin side.

Further, the stalk pulling mechanism comprises a telescopic cylinder arranged on the right side of the upper surface of the mounting plate, the output end of the telescopic cylinder is fixed with a moving seat, the moving seat is provided with a moving cavity, the lower surface of the moving seat is provided with a sliding block, the sliding block is matched with a sliding groove, a pulling roller is rotatably connected in the moving cavity, a first cleaning component is rotatably connected to the side surface, close to the telescopic cylinder, of the moving cavity, and first rotating shafts are arranged on two sides of the first cleaning component. One side that the feed inlet kept away from and removes the seat is fixed with the fixing base, the fixing base internal rotation is connected with pulls out the roller, the inboard rotation that the fixing base kept away from and removes the seat is connected with the clean subassembly of second, the side that the feed inlet was kept away from to removal seat and fixing base is provided with the power transmission subassembly, the side that the feed inlet was kept away from to the power transmission subassembly is provided with the power input port, the power transmission subassembly below that removes the seat is fixed with the control rod fixing base, the one end that the control rod fixing base is close to the fixing base is fixed with the control rod.

Furthermore, a plurality of pulling teeth distributed circumferentially are arranged on the circumference of the pulling roller, and edges and corners are arranged at the tail ends of the pulling teeth.

Furthermore, one end, extending out of the movable cavity, of the first rotating shaft is provided with a first control block, a cleaning limiting block is arranged on the side of the first control block, a self-cleaning limiting block is arranged at the lower end of the first control block, a self-cleaning fixing block is arranged on the side of the self-cleaning limiting block, and the self-cleaning fixing block is fixed on the upper surface of the mounting plate. One end of the first control block, which is close to the movable seat, is provided with a first torsion spring, and two ends of the first torsion spring are fixedly connected with the first control block and the side face of the movable seat respectively.

Furthermore, be provided with the second axis of rotation on the clean subassembly of second, second axis of rotation and fixing base rotate to be connected, and the one end that the second axis of rotation stretches out fixed chamber is provided with the second control block, and second control block below is provided with the stopper, and one side that the second control block is close to the fixing base is provided with the second torsional spring, second torsional spring both ends respectively with second control block, fixing base fixed connection.

Furthermore, the extrusion mechanism comprises a power fixing seat arranged at the inlet, the upper surface of the power fixing seat is rotatably connected with two extrusion wheels which are distributed in parallel, the side surface of the power fixing seat, which is close to the stem pulling mechanism, is rotatably connected with two extrusion guide wheels which are distributed in parallel, one end, which is far away from the power fixing seat, of each extrusion guide wheel is provided with a conical head, a conical guide groove is formed in each conical head, and a guide groove is formed in each extrusion guide wheel.

Furthermore, a cleaning component is arranged below the extrusion guide wheel, a plurality of cleaning rods are arranged on the cleaning component, a cleaning head is arranged at the upper end of each cleaning rod, and the cleaning head is matched with the guide groove.

Furthermore, clear native mechanism is including setting up the roll adjustment jar of two symmetric distributions in the fixing base side, and the roll adjustment jar output is provided with clear native board, is provided with a plurality of clear native strips on the clear native board.

Further, the working steps are as follows:

s1, moving a device forwards, and enabling plant stalks to enter a feeding hole;

s2, the telescopic cylinder pushes the movable seat to move towards the fixed seat, the two pulling-out rollers approach, the stalks incline towards the left side and are contacted with the conical heads, and the two cleaning assemblies are contacted with the pulling-out rollers;

s3, driving the pulling rollers to rotate, pulling out the stems, primarily extruding the stems by the pulling teeth, and primarily removing soil attached to the roots of the stems;

s4, the inclined stalks are upwards transported through the extrusion guide wheel and the conical head, and secondary extrusion is carried out;

s5, when the roots pass through the soil cleaning mechanism, soil is further removed, and the roots are flattened to facilitate subsequent extrusion;

s6, the extruded stalks enter a storage cavity;

and S7, the movable seat is reset, the two cleaning assemblies are reset, and the adhered impurities are shaken off.

The invention has the beneficial effects that:

the device comprises a movement mechanism, a stalk pulling mechanism, an extrusion mechanism and a soil cleaning mechanism. The stalk removing mechanism can primarily extrude the stalks and remove the soil adhered to the roots of the loose stalks when removing the stalks. The designed extrusion mechanism can flatten the stalks by extruding the stalks twice, thereby facilitating subsequent storage and drying. The stem stalk pulling mechanism can control the two cleaning assemblies to rotate by moving the movable seat, so that the cleaning effect is prevented from being reduced due to the fact that excessive sundries are adhered to the two cleaning assemblies.

Drawings

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

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the structure of the motion mechanism;

FIG. 3 is a schematic structural view of a stalk plucking mechanism;

FIG. 4 is an enlarged view of part A of the stalk removing mechanism;

FIG. 5 is a schematic view of a partial B enlarged structure of the stalk plucking mechanism;

FIG. 6 is a schematic view of the movable base;

FIG. 7 is a schematic view of a first cleaning assembly;

FIG. 8 is a schematic view of the construction of the plucking roller;

FIG. 9 is an enlarged schematic view of a portion C of the plucking roller;

FIG. 10 is a schematic view of a second cleaning assembly;

FIG. 11 is a schematic view of the pressing mechanism;

FIG. 12 is a schematic view of a pinch roller construction;

FIG. 13 is a schematic view of a portion of a C of the extrusion wheel;

fig. 14 is a schematic structural view of the soil cleaning mechanism.

The reference numbers in the figures illustrate:

1. a motion mechanism; 11. mounting a plate; 111. a chute; 112. a feed inlet; 113. a dust removal port; 12. a rotating wheel; 13. a lifting column; 14. a storage box; 141. a storage chamber; 142. an inlet; 2. a stalk pulling mechanism; 21. a telescopic cylinder; 22. a movable seat; 221. a moving chamber; 222. a slider; 23. removing the roller; 231. removing teeth; 2311. anti-skid edges and corners; 24. a fixed seat; 241. a fixed cavity; 25. a power transmission assembly; 251. a power input port; 26. a first cleaning assembly; 261. a first rotating shaft; 262. a first control block; 263. cleaning a limiting block; 264. self-cleaning limiting blocks; 265. self-cleaning fixed blocks; 266. a first torsion spring; 27. a second cleaning assembly; 271. a second rotating shaft; 272. a second control block; 273. a limiting block; 274. a second torsion spring; 28. a control lever; 29. a control rod fixing seat; 3. an extrusion mechanism; 31. a power fixing seat; 32. extruding the guide wheel; 321. a conical head; 322. a tapered guide groove; 323. a guide groove; 33. an extrusion wheel; 34. cleaning the gap assembly; 341. clearing the clearance rod; 3411. cleaning the gap head; 4. a soil clearing mechanism; 41. a distance adjusting cylinder; 42. clearing soil; 421. and (5) clearing soil strips.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "opening," "upper," "lower," "thickness," "top," "middle," "length," "inner," "peripheral," and the like are used in an orientation or positional relationship that is merely for convenience in describing and simplifying the description, and do not indicate or imply that the referenced component or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present invention.

A digging and recovering device for crop stalks comprises a movement mechanism 1, a stalk pulling mechanism 2, an extrusion mechanism 3 and a soil cleaning mechanism 4. As shown in fig. 1 and 2, the movement mechanism 1 includes a mounting plate 11, a chute 111 is opened at a position on the upper surface of the mounting plate 11 close to the right side, a feed inlet 112 is opened at a position on the upper surface of the mounting plate 11 close to the middle part, a dust removal port 113 is opened at a position on the upper surface of the mounting plate 11 close to the right side, four movable wheels 12 are distributed on the lower surface of the mounting plate 11 in an array manner, a lifting column 13 is arranged on the upper surface of each movable wheel 12, the lifting column 13 can be lifted, the position of the mounting plate 11 away from the ground is adjusted, and the device can move in a complex farmland. A storage box 14 is provided on the upper surface side of the attachment plate 11, a storage chamber 141 is provided in the storage box 14, and an inlet 142 is opened on the side of the storage box 14

As shown in fig. 1, 3, 4, 5, 6, 7, 8, 9, stalk removing mechanism 2 is including setting up the telescoping cylinder 21 on mounting panel 11 upper surface right side, the telescoping cylinder 21 output is fixed with removes seat 22, it has removal chamber 221 to remove seat 22, it is provided with sliding block 222 to remove seat 22 lower surface, sliding block 222 and spout 111 cooperation, it has removing roller 23 to remove the intracavity 221 internal rotation connection, it is provided with the tooth 231 of removing that a plurality of circumference distribute on the roller 23 circumference to remove, it is provided with edges and corners 2311 to remove the end of tooth 231, can be when removing crop stalk, it can not cut off owing to removing the too sharp stalk that leads to the stalk in tooth top simultaneously to remove the better chucking stalk of tooth 231, influence subsequent operation. The side of the moving chamber 221 close to the telescopic cylinder is rotatably connected with a first cleaning assembly 26, and first rotating shafts 261 are arranged on both sides of the first cleaning assembly 26. A fixed seat 24 is fixed on one side of the feed port 112 far away from the movable seat 22, a pulling roller 23 is rotationally connected in the fixed seat 24, a second cleaning component 27 is rotationally connected on the inner side of the fixed seat 24 far away from the movable seat 22, a power transmission component 25 is arranged on the side surfaces of the movable seat 22 and the fixed seat 24 far away from the feed port 112, a power input port 251 is arranged on the side surface of the power transmission component 25 far away from the feed port 112, an operating lever fixed seat 29 is fixed below the power transmission component 25 of the movable seat 22, and an operating lever 28 is fixed at one end of the operating lever fixed seat 29 close to the fixed seat 24.

As shown in fig. 3, 4, and 7, a first control block 262 is disposed at an end of the first rotating shaft 261 extending out of the moving cavity 221, a cleaning limit block 263 is disposed at a side of the first control block 262, a self-cleaning limit block 264 is disposed at a lower end of the first control block 262, a self-cleaning fixing block 265 is disposed at a side of the self-cleaning limit block 264, and the self-cleaning fixing block 265 is fixed on an upper surface of the mounting plate 11. One end of the first control block 262 close to the movable seat 22 is provided with a first torsion spring 266, and two ends of the first torsion spring 266 are fixedly connected with the first control block 262 and the side surface of the movable seat 22 respectively. When the self-cleaning limiting block 264 contacts with the self-cleaning fixing block 265, the first control block 262 drives the first cleaning assembly 26 to rotate, at this time, the first cleaning assembly 26 is separated from the plucking roller 23, and the first cleaning assembly 26 is in an inclined position. After the self-cleaning limiting block 264 and the self-cleaning fixing block 265 are separated, the cleaning limiting block 263 contacts with the upper surface of the power transmission assembly 25 under the action of the torsion spring, and the first cleaning assembly 26 contacts with the pulling-out roller 23.

As shown in fig. 3, 5 and 10, the second cleaning assembly 27 is provided with a second rotating shaft 271, the second rotating shaft 271 is rotatably connected with the fixed seat 24, one end of the second rotating shaft 271 extending out of the fixed cavity 241 is provided with a second control block 272, a limit block 273 is arranged below the second control block 272, one side of the second control block 272 close to the fixed seat 24 is provided with a second torsion spring 274, two ends of the second torsion spring 274 are respectively fixedly connected with the second control block 272 and the fixed seat 24, when the limit block 273 is in contact with the lower surface of the power transmission assembly 25 in a static state, the second cleaning assembly 27 is in an inclined position, and at this time, the second cleaning assembly 27 is separated from the plucking roller 23. When the movable seat 22 approaches the fixed seat 24, the operating rod 28 contacts the limiting block 273 to push the second cleaning assembly 27 to rotate to the horizontal position, and at this time, the second cleaning assembly 27 contacts the plucking roller 23.

As shown in fig. 1, 11, 12, and 13, the extruding mechanism 3 includes a power fixing seat 31 disposed at the inlet 142, the upper surface of the power fixing seat 31 is rotatably connected with two extruding wheels 33 distributed in parallel, the side surface of the power fixing seat 31 close to the stem removing mechanism 2 is rotatably connected with two extruding guide wheels 32 distributed in parallel, one end of the extruding guide wheel 32 far away from the power fixing seat 31 is provided with a conical head 321, the conical head 321 is provided with a conical guide groove 322, and the extruding guide wheel 32 is provided with a guide groove 323. The lower part of the extrusion guide wheel 32 is provided with a cleaning assembly 34, the cleaning assembly 34 is provided with a plurality of cleaning rods 341, the upper end of the cleaning rod 341 is provided with a cleaning head 3411, the cleaning head 3411 is matched with the guide groove 323, the residual stalks in the guide groove 323 can be removed, and the guide groove 323 can be ensured to stably convey the stalks.

As shown in fig. 1, 11, and 14, the soil cleaning mechanism 4 includes two distance adjusting cylinders 41 symmetrically disposed on the side of the fixing base 24, a soil cleaning plate 42 is disposed at an output end of the distance adjusting cylinders 41, and a plurality of soil cleaning strips 421 are disposed on the soil cleaning plate 42.

The working steps are as follows:

s1, the device moves forwards, and plant stalks enter a feeding hole 112;

s2, the telescopic cylinder 21 pushes the moving seat 22 to move towards the fixed seat 24, the two removing rollers 23 are close to each other, the stems incline towards the left side and are contacted with the conical heads 321, and the two cleaning assemblies are contacted with the removing rollers 23;

s3, driving the pulling-out roller 23 to rotate, pulling out the stems, primarily extruding the stems by the pulling-out teeth 231, and primarily removing soil attached to the roots of the stems;

s4, the inclined stalks are upwards transported through the extrusion guide wheel 32 and the conical head 321, and secondary extrusion is carried out;

s5, when the roots pass through the soil cleaning mechanism 4, soil is further removed, and the roots are flattened to facilitate subsequent extrusion;

s6, the extruded stalks enter the storage cavity 141;

s7, the movable seat 22 is reset, the two cleaning assemblies are inclined again, and the adhered sundries are shaken off.

The working principle is as follows:

when the device works, the moving mechanism 1 is arranged on the moving machine, then the device is driven to move forwards, after the stalks enter the feeding port 112, the telescopic cylinder 21 drives the moving seat 22 to move leftwards, the stalk is deflected towards the left side by the removing roller 23, the upper ends of the stalks are contacted with the conical head 321, and the first cleaning component 26 and the second cleaning component 27 are contacted with the removing roller 23. Pull out the roller 23 rotation through the drive of power transmission subassembly 25, extract the stem stalk, pull out tooth 231 can tentatively extrude the stem stalk, tentatively loose and clear away the adnexed earth of root, then extrusion mechanism 3 extrudees the stem stalk and draws to storing chamber 141, and the soil of root is further clear away when the clear soil mechanism 4 of stem stalk root process, and the root is squashed, makes things convenient for subsequent extrusion. After the two times of extrusion by the extruding mechanism 3, the flattened stalks are finally put into the storage cavity 141, so that the space can be effectively saved and the drying of the stalks is accelerated.

After the work is completed, the movable seat 22 is reset, the operating lever 28 is separated from the limit block 243, the limit block 243 is contacted with the power transmission assembly 25 under the action of the second torsion spring 274, and the second cleaning assembly 27 is reset to the inclined position. As the apparatus moves, the second cleaning assembly 27 vibrates to shake away debris attached thereto and out of the apparatus through the dust removal port 113. The self-cleaning limiting block 264 contacts with the self-cleaning fixing block 265 to drive the first cleaning block 26 to be in an inclined position, so that sundries adhered to the upper surface can fall off conveniently.

The beneficial effects are as follows:

the device comprises a movement mechanism 1, a stalk pulling mechanism 2, an extrusion mechanism 3 and a soil cleaning mechanism 4. The stalk removing mechanism 2 can primarily extrude the stalks and remove the soil adhered to the roots of the loose stalks when removing the stalks. The designed extrusion mechanism 3 can flatten the stalks by extruding the stalks twice, thereby facilitating subsequent storage and drying. The designed stalk pulling mechanism 2 can control the two cleaning components to rotate through the movement of the moving seat 22, and prevent the cleaning effect from being reduced due to the fact that excessive sundries are adhered to the two cleaning components.

In the description herein, references to the description of "one embodiment," "an example," "a specific example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed.

Claims

1. The utility model provides an excavate recovery unit for crop stem stalk, includes that motion (1), stem stalk pull out mechanism (2), extrusion mechanism (3) and clear soil mechanism (4), a serial communication port, motion (1) includes mounting panel (11), the position that mounting panel (11) upper surface is close to the right side is opened has spout (111), the position that mounting panel (11) upper surface is close to the middle part is opened has feed inlet (112), the position that mounting panel (11) upper surface is close to the right side is opened has dust removal mouth (113), mounting panel (11) lower surface array distributes and has four removal wheels (12), removal wheel (12) upper surface is provided with lift post (13), mounting panel (11) upper surface side is provided with bin (14), be provided with storage chamber (141) in bin (14), entry (142) are opened to bin (14) side;

stalk pulling out mechanism (2) is including setting up telescopic cylinder (21) on mounting panel (11) upper surface right side, telescopic cylinder (21) output is fixed with removal seat (22), removal seat (22) are opened and are had removal chamber (221), removal seat (22) lower surface is provided with sliding block (222), sliding block (222) and spout (111) cooperation, removal chamber (221) internal rotation is connected with pulls out roller (23), the side that removal chamber (221) is close to the telescopic cylinder rotates and is connected with first clean subassembly (26), first clean subassembly (26) both sides are provided with first axis of rotation (261), one side that feed inlet (112) was kept away from removal seat (22) is fixed with fixing base (24), internal rotation is connected with pulls out roller (23) in fixing base (24), the inboard that fixing base (24) were kept away from removal seat (22) rotates and is connected with second clean subassembly (27), the side that feed inlet (112) were kept away from to removal seat (22) and fixing base (24) is provided with power transmission subassembly (25), the side that power transmission subassembly (25) was kept away from feed inlet (112) was provided with power transmission subassembly (29), there is fixed operating lever (29) below fixed operating lever (29).

2. The digging and recycling device for crop stalks according to claim 1, wherein the plucking roller (23) is circumferentially provided with a plurality of circumferentially distributed plucking teeth (231), and the ends of the plucking teeth (231) are provided with edges (2311).

3. The digging and recycling device for the crop stalks according to claim 1, wherein a first control block (262) is arranged at one end of the first rotating shaft (261) extending out of the moving cavity (221), a cleaning limit block (263) is arranged on the side of the first control block (262), a self-cleaning limit block (264) is arranged at the lower end of the first control block (262), a self-cleaning fixed block (265) is arranged on the side of the self-cleaning limit block (264), the self-cleaning fixed block (265) is fixed on the upper surface of the mounting plate (11), a first torsion spring (266) is arranged at one end of the first control block (262) close to the moving seat (22), and two ends of the first torsion spring (266) are fixedly connected with the first control block (262) and the side of the moving seat (22) respectively.

4. The digging and recycling device for crop stalks according to claim 1, wherein a second rotating shaft (271) is arranged on the second cleaning assembly (27), the second rotating shaft (271) is rotatably connected with the fixed seat (24), a second control block (272) is arranged at one end of the second rotating shaft (271), which extends out of the fixed cavity (241), a limiting block (273) is arranged below the second control block (272), a second torsion spring (274) is arranged at one side of the second control block (272), which is close to the fixed seat (24), and two ends of the second torsion spring (274) are respectively fixedly connected with the second control block (272) and the fixed seat (24).

5. The digging and recycling device for crop stalks according to claim 1, wherein the squeezing mechanism (3) comprises a power fixing seat (31) arranged at the inlet (142), the upper surface of the power fixing seat (31) is rotatably connected with two squeezing wheels (33) which are distributed in parallel, the side surface of the power fixing seat (31) close to the stalk pulling mechanism (2) is rotatably connected with two squeezing guide wheels (32) which are distributed in parallel, one end of the squeezing guide wheel (32) far away from the power fixing seat (31) is provided with a conical head (321), the conical head (321) is provided with a conical guide groove (322), and the squeezing guide wheel (32) is provided with a guide groove (323).

6. The digging and recovering device for crop stalks according to claim 5, wherein a clear gap assembly (34) is provided below the press guide (32), a plurality of clear gap rods (341) are provided on the clear gap assembly (34), clear gap heads (3411) are provided on upper ends of the clear gap rods (341), and the clear gap heads (3411) are engaged with the guide grooves (323).

7. The excavating and recovering device for crop stalks according to claim 1, wherein the soil clearing mechanism (4) comprises two distance adjusting cylinders (41) which are symmetrically distributed and arranged on the side surface of the fixed seat (24), the output end of the distance adjusting cylinder (41) is provided with a soil clearing plate (42), and the soil clearing plate (42) is provided with a plurality of soil clearing strips (421).