CN211721063U

CN211721063U - Fertilizer applicator of single-seed high-precision seed sowing machine

Info

Publication number: CN211721063U
Application number: CN201922423932.8U
Authority: CN
Inventors: 张宝军; 张渤婉
Original assignee: Henan Landmark Intelligent Equipment Co ltd
Current assignee: Henan Landmark Intelligent Equipment Co ltd
Priority date: 2019-12-27
Filing date: 2019-12-27
Publication date: 2020-10-23
Anticipated expiration: 2029-12-27

Abstract

The utility model relates to the technical field of agricultural machinery operation, in particular to a fertilizer applicator of a single-seed high-precision seed sowing machine, which comprises a connecting frame and two front ditching discs, wherein the top of the connecting frame is provided with a clamping part, the connecting frame comprises a clamping frame and a hinged frame, the hinged frame is rotatably connected with the bottom of the clamping frame through a connecting shaft, a vertical sliding sleeve is fixedly arranged in the clamping frame, a guide post vertically slides in the vertical sliding sleeve, the bottom of the guide post is provided with a hinged seat, the middle section of the hinged frame is provided with a hinged joint, a reset spring is sleeved between the bottom of the vertical sliding sleeve and the hinged seat of the guide post, the depth of a groove formed by the fertilizer applicator is basically the same, a fertilizer pipe falls the fertilizer in the groove with the same depth, the growth vigor of crops is uniform, the survival rate of the seeds is improved, the reset spring enables the guide post to slide in the vertical sliding sleeve, can cross stone and other hard objects without damaging the front ditching disc.

Description

Fertilizer applicator of single-seed high-precision seed sowing machine

Technical Field

The utility model relates to the technical field of agricultural machinery operation, in particular to a fertilizer applicator of a single-seed high-precision seed sowing machine.

Background

The seeder for different crops generally comprises a frame, a traction or suspension device, a seed box, a seed sowing device, a transmission device, a seed conveying pipe, a furrow opener, a row rowing device, a traveling wheel, a soil covering and pressing device and the like, wherein the seeding quality is influenced mainly by the seed sowing device and the furrow opener.

Present furrow opener is fixed in the frame, when going on the lower soil seeding of roughness, the ditch groove depth that the furrow opener was opened differs, fertilizer falls to the ditch inslot that the furrow opener was opened through leading fertile pipe, because the groove depth differs, make fertilizer run off, the nutrient inequality for the seed provides, make the vigor of crops uneven, when the furrow opener carries out the ditching to the soil, touch hard things such as stone, can harm to some extent the furrow opener, reduce the life of furrow opener.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a fertilizer applicator of single seed grain high accuracy seed planter to solve the problem that provides among the above-mentioned background art.

The technical scheme of the utility model is that:

a fertilizer applicator of a single-grain high-precision seed sowing machine, which comprises a connecting frame and two front ditching discs distributed in an inverted splayed shape, the top of the connecting frame is provided with a clamping part which is fixedly connected with the clamping hook through a fixed pipe, all the front ditching discs are rotatably connected with the bottom of the connecting frame, the connecting frame comprises a clamping frame and a hinge frame, the hinge frame is rotatably connected with the bottom of the clamping frame through a connecting shaft, all the front ditching discs are rotatably connected with the bottom of the hinge frame, a vertical sliding sleeve is fixedly arranged in the clamping frame, a guide post vertically slides in the vertical sliding sleeve, the bottom end of the guide column is hinged with the middle section of the hinged frame, the bottom end of the guide column is provided with a hinged seat, the middle section of the hinged frame is provided with a hinged joint, the hinged joint is hinged with the hinged seat through the connecting shaft, and the guide column is sleeved with a return spring between the bottom end of the vertical sliding sleeve and the hinged seat.

Preferably, the articulated frame is located and installs between two preceding ditching discs and leads fertile pipe, the outside of leading fertile pipe is provided with the joint piece, the articulated frame is provided with joint piece joint complex joint groove, the outside of leading fertile pipe still is provided with the circular arc backplate, the circular arc backplate is located and is provided with a plurality of baffle between two preceding ditching discs.

Preferably, the included angle between the planes of the two front ditching discs is 10 degrees and 30 degrees.

Preferably, the bottom of the hinged frame is of a circular arc structure with a downward opening, and the bottom of the hinged frame is concentric with the circular arc guard plate.

The vertical sliding sleeve is fixed on the clamping frame through a bolt, and the clamping frame is provided with a containing through hole for containing the vertical sliding sleeve.

Preferably, the guide post is provided with a guide hole for avoiding the bolt along the length direction of the guide post.

The utility model discloses an improve and provide a fertilizer applicator of single seed grain high accuracy seed sowing machine here, compare with prior art, have following improvement and advantage:

one is as follows: the utility model discloses a reset spring promotes hinge frame and drives preceding ditching disc and laminate all the time on ground, makes the ditch groove depth that fertilizer applicator opened basically the same, and the fertilizer pipe falls fertilizer in the ditch groove of equal depth between two preceding ditching discs, avoids fertilizer to run off, evenly provides the nutrient for the seed, makes the growth vigor of crops neat, guarantees the buried degree of depth of seed, improves seed survival rate;

the second step is as follows: the utility model discloses a reset spring makes the guide post can slide in vertical sliding sleeve, and when the fertilizer applicator carries out the ditching to the soil, can stride across hard things such as stone, can not harm the preceding ditching disc to some extent, the life and the ditching efficiency of ditching disc before improving.

Drawings

The invention is further explained below with reference to the figures and examples:

FIG. 1 is a schematic view of a three-dimensional structure of the high-precision seeder of the present invention;

FIG. 2 is a schematic view of the high-precision seed sowing machine of the present invention;

fig. 3 is a schematic three-dimensional structure diagram of the high-precision seeder of the present invention;

fig. 4 is a schematic view of the three-dimensional structure of the high-precision seeder of the present invention;

FIG. 5 is a schematic view showing a three-dimensional structure of the fertilizer applicator of the present invention;

FIG. 6 is a schematic view of the three-dimensional structure of the fertilizer applicator of the present invention;

fig. 7 is a schematic perspective view of the compacting device according to the present invention;

fig. 8 is a schematic perspective view of the second embodiment of the compacting device of the present invention;

fig. 9 is a schematic three-dimensional structure view of the compacting device of the present invention;

fig. 10 is a schematic perspective view of the compacting device of the present invention;

FIG. 11 is a first perspective view of the seed metering device of the present invention;

FIG. 12 is a cross-sectional view showing the three-dimensional structure of the seed metering device of the present invention in the seed metering direction;

FIG. 13 is a schematic perspective view of the furrow opener, the frame and the road wheel of the present invention;

FIG. 14 is a second cross-sectional view of the seeding apparatus of the present invention;

FIG. 15 is a schematic perspective view of the seed metering device of the present invention;

FIG. 16 is a schematic perspective view of the second embodiment of the seed sowing device of the present invention;

FIG. 17 is a first schematic view of the assembly of the three-dimensional structure of the seed discharge disk and the shifting plate of the present invention;

FIG. 18 is a second schematic view of the assembly of the three-dimensional structure of the seed discharge disk and the shifting plate of the present invention;

FIG. 19 is a schematic view of the assembled three-dimensional structure of the casing and the external stirring plate of the seed sowing device of the present invention;

fig. 20 is a side view of the compacting apparatus of the present invention;

FIG. 21 is a cross-sectional view taken along line A-A of FIG. 20;

FIG. 22 is a perspective view of the seed metering device housing and air shutoff valve assembly;

description of reference numerals: the fertilizer applicator 1, a connecting frame 1a, a clamping frame 1a1, a hinged frame 1a2, a connecting shaft 1a3, a vertical sliding sleeve 1a4, a guide post 1a5, a hinged head 1a6, a connecting shaft 1a7, a hinged seat 1a8, a reset spring 1a9, a front ditching disc 1b, a clamping part 1c, a fixed pipe 1d, a fertilizer guide pipe 1e, a clamping block 1f, an arc-shaped guard plate 1h, a baffle plate 1k, a containing through hole 1m, a guide hole 1n, a poking strip plate 2, an inner poking strip plate 21, an outer poking strip plate 22, an arc-shaped notch 221, a sliding head 222, a sawtooth 223, a first rotating shaft 23, a second rotating shaft 24, a first limiting clamping strip 25, a first limiting clamping block 26, a second limiting clamping strip 27, a second limiting clamping block 28, a U-shaped block 29, a connecting arm 2a, a connecting arm 2b, a limiting rectangular abutting frame 2c, a limiting handle 2d, a limiting hole 2e, a connecting rod 2f, a connecting rod 2g, a limiting head, seed discharging plate 2k, seed guiding pipe 2m, frame 3, seed discharging port 3a, connecting part 3b, press device 4, covering shell 4a, avoiding bar hole 4a1, grading clamping joint 4a2, round hole 4a3, arc hole 4a4, positioning hole 4a5, scale hole 4a6, avoiding hole 4a7, connecting hole 4a8, mounting block 4a9, covering wheel 4b, adjusting mechanism 4c, pull rod 4c1, pulling spring 4c2, connecting shaft 4c3, rotating block 4c4, positioning column cap 4c5, rotating rod 4c6, connecting rod mechanism 5, hook 5a, rotating arm 5b, hinge shaft 5c, handle 5d, multi-stage clamping gap 5d1, U-shaped clamping part 5e, buffer spring 5f, rotating shaft 5h, limiting rod 5k, driving rod 5m, shaft hole 5m1, connecting arm 5n, driven chain wheel 5z, driven chain wheel 61, seed discharging device shell 62, rotating shaft 62, a seed suction hole 64, a furrow opener 7, a rear furrow opening disc 7a, a travelling wheel 8, a seed box 9, a seed storage box 91, a covering tire 10, an air-shut valve 11 and a swing shaft 12.

Detailed Description

The present invention will be described in detail below, and it is apparent that the technical solutions in the embodiments of the present invention are described clearly and completely. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The utility model provides a single-seed high-precision seeder through improvement, as shown in figures 1-22, the high-precision seeder comprises a seeding box 9, a frame 3 and a furrow opener 7 which are sequentially arranged from top to bottom, the seeding box 9 is arranged at the top of the frame 3, and the furrow opener 7 is arranged at the bottom of the frame 3;

the high-precision seeding machine further comprises a fertilizer applicator 1, a seed sowing device 6 and a press device 4 which are sequentially arranged from front to back along the seeding direction, wherein the seed sowing device 6 is arranged on the rack 3, the fertilizer applicator 1 is hinged with the front end of the rack 3 in the seeding direction through a connecting rod mechanism 5, and the press device 4 is hinged with the rear end of the rack 3 in the seeding direction;

the seed metering device 6 comprises a shell 62 and a seed metering disc 61 vertically and rotatably installed in the shell 62, a seed metering cavity communicated with a seed metering box 9 is formed between the inside of the shell 62 and one side of the seed metering disc 61, a negative pressure pipe 2a is communicated with one side of the shell 62, which is positioned at one side of the seed metering disc 61 and is far away from the seed metering cavity, a plurality of seed metering suction holes 64 distributed along the circumferential direction of the seed metering disc 61 are arranged at the edge of the seed metering disc 61, a plurality of poking-down strips 2 attached to the seed metering suction holes 64 on the seed metering disc 61 are rotatably installed at the inner side of the shell 62, an air closing valve 11 is arranged at an output port in the shell, the air closing valve 11 is an air closing disc, the air closing valve 11 is installed at the back side of the seed metering disc 61 through a connecting plate, the air closing valve 11 is arranged at the back side of the plurality of seed metering suction holes at the output port of the shell and, thereby dropping the seeds.

The poking-down lath 2 is divided into an inner poking-down lath 21 capable of poking down seeds on a seed suction hole in the inner ring of the seed discharge disc 61 and an outer poking-down lath 22 capable of poking down seeds on a seed suction hole in the outer ring of the seed discharge disc 61, the inner poking-down lath 21 is connected with the shell in a rotating manner through a first rotating shaft 23 perpendicular to the seed discharge disc 61, one end of the first rotating shaft 23 extends out of the shell and is provided with a first limiting clamping strip 25, the outer side of the shell is provided with a plurality of first limiting clamping blocks 26 capable of being clamped and matched with the first limiting clamping strips 25, the first limiting clamping blocks 26 are distributed in an angular difference manner around the first rotating shaft 23, the outer poking-down lath 22 is of an arc-shaped structure, one end of the outer poking-down lath 22 is rotatably installed in the shell through a swinging shaft perpendicular to the plane of the seed discharge disc 61, the other end of the outer poking-down lath 22 is provided with an, the casing is close to arc breach 221 one end, rotates and installs second pivot 24, second pivot 24 and second pivot 24 are all parallel with the rotation axis, the one end that second pivot 24 is close to seed metering disc 61 is provided with U-shaped piece 29, U-shaped piece 29 is provided with the slippery fellow 222 with arc breach 221 sliding fit, the one end that seed metering disc 61 was kept away from in second pivot 24 extends the casing and is provided with the spacing card strip 27 of second, the outside of casing is located the spacing card strip 27 side of second and is provided with the spacing fixture block 28 of a plurality of and can with the spacing card strip 27 joint complex of second, the spacing fixture block 28 of second distributes around the equal angular difference of second pivot 24.

The seeds in the seed storing box fall into the seed discharging cavity of the shell, the negative pressure pipe 2a is communicated with a negative pressure device (not shown in the figure), the seed discharging disc 61 is rotated, the negative pressure device is started, negative pressure is formed in the shell, so that the seeds are sucked on the seed discharging suction hole, the second limiting clamping strip 27 and the first limiting clamping strip 25 are both plastic parts and have flexibility, the first limiting clamping strip 25 and the second limiting clamping strip 27 are pulled to respectively leave the first limiting clamping block 26 and the second limiting clamping block 28, the second rotating shaft 24 is rotated, the distance from the inner side of the outer poking strip plate 22 to the peripheral seed discharging suction hole is adjusted, the seeds with the diameter larger than the requirement are poked down, or the seeds with the outermost periphery are poked down, the first rotating shaft 23 is rotated, the distance from the inner side of the inner poking strip 21 to the inner peripheral seed discharging suction hole is adjusted, the seeds with the diameter larger than the requirement are poked down, or the seeds with the innermost periphery are poked down, dialling slat 21 and dialling slat 22 outward in the independent use respectively, can guaranteeing unit interval, single seed drop all the time of seed metering ware, the delivery outlet of casing is provided with seed metering board 2k, seed metering board 2k inhales the hole from the seed metering of inner periphery and extends to peripheral seed metering inhaling hole for arc structure and seed metering board 2 k's radian direction, the inboard arc limit of dialling slat 22 outward is provided with sawtooth 223, it is provided with air-lock valve 11 to lie in the delivery outlet in the casing, inhales the hole when the seed metering that has the seed, through air-lock valve 11, air-lock valve 11 seals this seed metering inhaling hole, then the seed falls out from the seed guide, arc structure's seed guide 2m is installed to the delivery outlet of seed metering ware.

The tail end at the tractor is generally fixed to the high accuracy machine of sowing, and the tractor pulling high accuracy machine of sowing sows, and at first fertilizer applicator 1 opens the slot with the soil along the seeding direction, and furrow opener 7 is dialled the soil in the slot open, and seed metering ware 6 arranges the seed to the slot in simultaneously, and last suppression device 4 is filled and is leveled the soil of slot both sides with the ditch inslot seed.

The bottom of the frame 3 is rotatably provided with a walking wheel 8 arranged beside the furrow opener 7, the walking wheel is rotatably connected with the frame 3 through a connecting arm 2b, the bottom of the frame 3 is positioned right above the walking wheel 8 and rotatably provided with a limit rectangular frame 2c, the limit rectangular frame 2c is rotatably matched with the frame 3 through a connecting shaft, a limit handle 2d is slidably matched in the limit rectangular frame 2c along the length direction of the limit handle 2c, the limit handle 2d is positioned in the limit frame and is provided with a connecting spring 2g, one end of the limit rectangular frame 2c far away from the limit handle 2d is provided with a touch bar 2f capable of touching the connecting arm 2b, the touch bar 2f is rotatably matched with the bottom of the limit rectangular frame 2c through a swinging shaft 12, the axis of the swinging shaft 12 is vertical to the axis of the connecting shaft, the bottom of the frame 3 is provided with a plurality of limit holes 2e distributed in an arc shape, and the limiting handle 2d is provided with a limiting head 2h which can be matched with the limiting hole 2e in an inserting manner.

The connecting rod mechanism 5 comprises clamping hooks 5a and two strip-shaped rotating arms 5b, the two rotating arms 5b are arranged at intervals along the vertical direction, the central lines of the two rotating arms 5b are always parallel to each other, one ends of the two rotating arms 5b are hinged with the front end of the machine frame 3 in the sowing direction through hinge shafts 5c, the clamping hooks 5a are rotatably connected with one ends of the two rotating arms 5b far away from the machine frame 3 through rotation shafts 5h, the axes of all the hinge shafts 5c and the axes of all the rotation shafts 5h are vertical to the sowing direction, a handle 5d is hinged to one end, close to the machine frame 3, of the upper rotating arm 5b, the rotating arm 5b is positioned at the handle 5d and is hinged with a U-shaped clamping part 5e, a multi-stage clamping notch 5d1 matched with the U-shaped clamping part 5e in a clamping way is arranged on the handle 5d, a plurality of buffer springs 5f are arranged between the, pulling handle 5d for joint portion 1c joint is in multistage joint breach 5d1, makes buffer spring 5f the degree of being elongated different, makes the seed metering ware 6 different with the dynamics on suppression device 4 laminating ground, makes the drill can ditch the slot of the same degree of depth on unsmooth ground.

The articulated shaft 5c side rotation that frame 3 is located to be in the below installs gag lever post 5k, and one end that one of them buffer spring 5f is connected with handle 5d and gag lever post 5 k's tip fixed connection, and gag lever post 5k can avoid rotor arm 5b turned angle too big, and seed metering ware 6 and fertilizer applicator 1 are contradicted, avoid causing seed metering ware 6 to beat by a wide margin, and the seed metering degree of accuracy is lower.

Rotate on pothook 5a and install drive sprocket 5m, rotate in the frame 3 and install connecting sprocket 5n, install driven sprocket 5z on the output shaft of seed metering ware 6, drive sprocket 5m is provided with shaft hole 5m1, and drive sprocket 5m, connecting sprocket 5n and driven sprocket 5z pass through the chain drive cooperation, drive sprocket 5m through the tractor and rotate for driven sprocket 5z drives seed metering ware 6 and rotates and arrange the ditch inslot with the seed.

The seed metering device 6 comprises a shell 62 and a seed metering disc 61 rotatably mounted in the shell 62, the seed metering disc 61 is rotatably matched with the shell 62 through a rotating shaft 63, the axis of the rotating shaft 63 is parallel to a hinge shaft 5c, the plane of the seed metering disc 61 is perpendicular to the axis of the rotating shaft 63, a plurality of seed metering suction holes 64 distributed along the circumferential direction of the seed metering disc 61 are formed in the edge of the seed metering disc 61, a driven sprocket 5z rotates to drive the rotating shaft 63 and the seed metering disc 61 to rotate, and when the seed metering disc 61 rotates, seeds in the seed metering suction holes 64 are driven to fall out from an outlet of the shell 62.

The output end of the seed sowing device 6 is communicated with the seed sowing box 9, the output end of the seed sowing device 6 faces downwards, the bottom of the rack 3 is provided with a seed sowing port 3a for avoiding the output end of the seed sowing device 6, and seeds falling from the outlet of the shell 62 fall into the groove from the seed sowing port 3 a.

Furrow opener 7 is the back ditching disc 7a that the eight characters of falling distribute including two, the place plane of two back ditching discs 7a all is parallel with the seeding direction, the bottom downwardly extending of frame 3 extends connecting portion 3b, all back ditching discs 7a all rotate with connecting portion 3b and are connected, the soil in the ditch inslot that two back ditching discs 7a opened fertilizer applicator 1 is dialled out, guarantee that the seed is arranged to sufficient degree of depth, avoid the seed to fall not in place, make the seed germination percentage not enough.

Fertilizer applicator 1 is including link 1a and two preceding ditching disc 1b that are the distribution of falling eight characters, the top of link 1a is provided with joint portion 1c, joint portion 1c is through fixed pipe 1d and pothook 5a fixed connection, and all preceding ditching discs 1b are the distribution of falling eight characters and all rotate with the bottom of link 1a and be connected, preceding ditching disc 1b ditches ground, and fixed pipe 1d can make things convenient for the loading and unloading of fertilizer applicator 1 and seed metering ware 6.

Connecting frame 1a is including joint frame 1a1 and articulated frame 1a2, articulated frame 1a2 is connected with joint frame 1a1 bottom rotation through connecting axle 1a3, and all preceding ditching discs 1b are the distribution of falling the eight characters and all rotate with the bottom of articulated frame 1a2 and be connected, can adjust the distance of all preceding ditching discs 1b and ground through articulated frame 1a 2.

The soil ditching machine is characterized in that a vertical sliding sleeve 1a4 is fixedly installed in the clamping frame 1a1, a guide column 1a5 is vertically arranged in the vertical sliding sleeve 1a4 in a sliding mode, the bottom end of the guide column 1a5 is hinged to the middle section of the hinged frame 1a2, a hinged seat 1a8 is arranged at the bottom end of the guide column 1a5, a hinged head 1a6 is arranged at the middle section of the hinged frame 1a2, the hinged head 1a6 is hinged to the hinged seat 1a8 through a connecting shaft 1a7, a return spring 1a9 is sleeved between the bottom end of the vertical sliding sleeve 1a4 and the hinged seat 1a8 of the guide column 1a5, according to hardness and flatness of soil, the return spring 1a9 pushes against a front disc 1b to ditch the soil, and the depth of the ditches can be guaranteed to be the same.

Articulated frame 1a2 is located and installs between two preceding ditching discs 1b and leads fertile pipe 1e, the outside of leading fertile pipe 1e is provided with joint piece 1f, articulated frame 1a2 is provided with joint piece 1f joint complex joint groove, the outside of leading fertile pipe 1e still is provided with circular arc backplate 1h, circular arc backplate 1h is located and is provided with a plurality of baffle 1k between two preceding ditching discs 1b, and preceding ditching disc 1b ditches soil, leads fertile pipe 1e intercommunication and has the fertilizer case, and fertilizer in the fertilizer case falls to the ditch inslot of opening through leading fertile pipe 1 e.

Two the contained angle of the plane that preceding ditching disc 1b place is between 10 degrees and 30 degrees, so set up, can improve ditching efficiency.

The bottom of the hinge frame 1a2 is of a circular arc structure with a downward opening, and the bottom of the hinge frame 1a2 and the circular arc guard plate 1h are concentric, so that the two front ditching discs 1b are prevented from rotating and simultaneously colliding against the hinge frame 1a 2.

Vertical sliding sleeve 1a4 passes through the bolt fastening on joint frame 1a1, joint frame 1a1 is provided with the holding through-hole 1m that has held vertical sliding sleeve 1a4, conveniently gets and puts vertical sliding sleeve 1a 4.

The guide post 1a5 is provided with a guide hole 1n for avoiding the bolt along the length direction thereof, so as to avoid the bolt from obstructing the sliding of the guide post 1a 5.

The suppression device 4 is including rotating the cover casing 4a of being connected with frame 3 bottom, two cover wheel 4b and the adjustment mechanism 4c that are the distribution of falling eight characters, adjustment mechanism 4c is including being used for driving cover casing 4a pivoted pulling subassembly down and being used for adjusting the adjustment subassembly that covers the wheel 4b height, the pulling subassembly is including rotating pull rod 4c1 and pulling spring 4c2 of being connected with cover casing 4a inboard, the bottom of pull rod 4c1 is passed through coupling shaft 4c3 and is connected with cover casing 4a rotation, the axis of coupling shaft 4c3 is perpendicular with the seeding direction, the one end and the pull rod 4c1 fixed connection of pulling spring 4c2, the one end fixedly connected with fixing base of pulling spring 4c2 is not shown in the picture, the fixing base is fixed on frame 3, the bottom of covering casing 4a rotates and is connected with rotating block 4c4, two covering wheels 4b are fixed on two sides of a rotating block 4c4, a rotating rod 4c6 is fixed on the rotating block 4c4, the bottom end of the rotating rod 4c6 is fixed on the rotating block 4c4, the outer rings of all the covering wheels are provided with covering tires 10 with triangular sections passing through the axes of the covering wheels,

pulling the pull rod 4c1 away from the frame 3, the pull spring 4c2 is stretched, and the restoring force of the pull spring 4c2 makes the whole press device 4 rotate downwards, thereby improving the covering force of the covering wheel 4b to cover the soil on the trench.

The bottom end of the pull rod 4c1 is provided with a through hole with a diameter larger than that of the coupling shaft 4c3, the top of the cover shell 4a is provided with an avoidance strip hole 4a1 for avoiding the rotation of the pull rod 4c1, the avoidance strip hole 4a1 is provided with a plurality of grading clamping joints 4a2 for abutting against the pull rod 4c1 along the length direction, the pull rod 4c1 is pulled to be far away from the rack 3 to abut against different grading clamping joints 4a2, the pulling spring 4c2 is stretched, the restoring force of the pulling spring 4c2 enables the whole press device 4 to rotate downwards, and the covering force of the covering wheel 4b for covering the soil in the groove is adjusted.

The cover shell 4a is provided with a round hole 4a3 for avoiding the rotating block 4c4, the top of the round hole 4a3 is provided with an arc hole 4a4, the arc hole 4a4 and the round hole 4a3 are concentric, the bottom end of the rotating rod 4c6 passes through the arc hole 4a4 through a bolt and is fixed on the rotating block 4c4, the side surface of the cover shell 4a is provided with a plurality of positioning holes 4a5 distributed at equal angular difference, a positioning column head 4c5 capable of being inserted into the positioning hole 4a5 is installed on the pull rod 4c1 in a threaded mode, the positioning column head 4c5 is taken down, the rotating rod 4c6 is moved, and due to the fact that the two cover wrenches 4b are obliquely arranged, the rotating block 4c4 rotates in the round hole 4a3, and the distance from the cover wheel 4b to the cover shell 4 a.

Cover casing 4 a's side and be located arc hole 4a4 and be provided with the scale hole 4a6 of circular arc structure directly over, the intermediate position that covers casing 4a side is provided with and is used for dodging rotary rod 4c6 pivoted and dodge hole 4a7, rotary rod 4c6 passes and dodges hole 4a7 and wears out from scale hole 4a6, pulls rotary rod 4c6, sees scale on the scale hole 4a6, can clearly know and cover wheel 4b around the rotatory angle of round hole 4a 3.

Cover casing 4 a's side and be provided with intercommunication scale hole 4a6 and dodge connecting hole 4a8 of hole 4a7, cover casing 4 a's side is provided with the installation piece 4a9 with fixed closed connecting hole 4a8, takes off installation piece 4a9, puts into dodge hole 4a7 with rotary rod 4c6 in, then installs installation piece 4a9 and seals connecting hole 4a8 on covering casing 4a, avoids rotary rod 4c6 to rotate excessively, damages and covers wheel 4 b.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The utility model provides a fertilizer applicator of single seed grain high accuracy seeder which characterized in that: the fertilizer applicator (1) comprises a connecting frame (1a) and two front ditching discs (1b) which are distributed in an inverted splayed manner, wherein a clamping part (1c) is arranged at the top of the connecting frame (1a), the clamping part (1c) is fixedly connected with a clamping hook (5a) through a fixing pipe (1d), all the front ditching discs (1b) are rotatably connected with the bottom of the connecting frame (1a), the connecting frame (1a) comprises a clamping frame (1a1) and a hinged frame (1a2), the hinged frame (1a2) is rotatably connected with the bottom of the clamping frame (1a1) through a connecting shaft (1a3), all the front ditching discs (1b) are rotatably connected with the bottom of the hinged frame (1a2), a vertical sliding sleeve (1a4) is fixedly installed in the clamping frame (1a1), a guide column (1a5) vertically slides in the vertical sliding sleeve (1a4), and the bottom end of the guide column (1a5) is hinged with the middle section of the 2a 2, the bottom of guide post (1a5) is provided with articulated seat (1a8), and the middle section of articulated frame (1a2) is provided with articulated head (1a6), articulated head (1a6) are articulated through linking up axle (1a7) and articulated seat (1a8), the cover is equipped with reset spring (1a9) between guide post (1a5) is located vertical sliding sleeve (1a4) bottom and articulated seat (1a 8).

2. The fertilizer applicator of the single-grain high-precision seed sowing machine according to claim 1, wherein: articulated frame (1a2) is located and installs between two preceding ditching disc (1b) and leads fertile pipe (1e), the outside of leading fertile pipe (1e) is provided with joint piece (1f), articulated frame (1a2) is provided with the joint groove with joint piece (1f) joint complex, the outside of leading fertile pipe (1e) still is provided with circular arc backplate (1h), circular arc backplate (1h) are located and are provided with a plurality of baffle (1k) between two preceding ditching disc (1 b).

3. The fertilizer applicator of the single-grain high-precision seed sowing machine according to claim 1, wherein: the included angle of the planes of the two front ditching discs (1b) is between 10 degrees and 30 degrees.

4. The fertilizer applicator of the single-grain high-precision seed sowing machine according to claim 1, wherein: the bottom of the hinge frame (1a2) is of a circular arc structure with a downward opening, and the bottom of the hinge frame (1a2) is concentric with the circular arc guard plate (1 h).

5. The fertilizer applicator of the single-grain high-precision seed sowing machine according to claim 1, wherein: vertical sliding sleeve (1a4) pass through the bolt fastening on joint frame (1a1), joint frame (1a1) are provided with holding through-hole (1m) that hold vertical sliding sleeve (1a 4).

6. The fertilizer applicator of the single-grain high-precision seed sowing machine according to claim 1, wherein: the guide post (1a5) is provided with a guide hole (1n) for avoiding a bolt along the length direction thereof.