CN211267658U

CN211267658U - Clear kind of system of vegetable planter with adjustable

Info

Publication number: CN211267658U
Application number: CN201921486558.XU
Authority: CN
Inventors: 杨文彩; 潘吴建; 施郭健; 陈建明; 梁业旺; 张海东; 黄兆波; 李贵荣; 郎冲冲; 徐路路
Original assignee: Yunnan Agricultural University
Current assignee: Yunnan Agricultural University
Priority date: 2019-09-09
Filing date: 2019-09-09
Publication date: 2020-08-18
Anticipated expiration: 2029-09-09

Abstract

The utility model provides a vegetable planter seed cleaning system with adjustable belongs to agricultural machine technical field, the utility model discloses mainly for solving the problem that vegetable plug seedling precision planter sow the reseeding rate of similar spherical seed when increaseing the negative pressure higher and clear kind to not equidimension seed, it can match current seeding plug for 168's air-aspiration formula seed metering ware to have designed a section, and satisfy the clear kind of system of seed of adjustable vegetable planter of the single seed precision seeding agronomic requirement of different vegetable seeds, this system adopts levogyration worm gear, dextrorotation worm gear realizes simultaneous bidirectional feed, cam stroke change and gear ratio transmission, realize the accurate adjustable seed cleaning to 0.2mm to 10mm seed, adopt the utility model discloses can practice thrift bulk production cost, improve seeding rate and seed adaptability, can also improve the vegetable precision seeding effect.

Description

Clear kind of system of vegetable planter with adjustable

Technical Field

The utility model belongs to the technical field of agricultural machine, concretely relates to vegetable planter clear kind of system with adjustable.

Background

In order to save a large amount of production cost in the mechanized plug seedling planting of vegetables, the improvement of the production efficiency is always an important research subject of agricultural mechanized operation, and a precision seeding machine is required to be applied. In the plug seedling process, it is very critical to ensure the qualification rate of the mechanized plug seedling, and the qualification rate is mainly influenced by a seed sowing device and a seed cleaning device of a seeder. At present, the seed sowing device mainly adopts an air suction type seed sowing device, but a proper seed cleaning device is not provided to be matched with the existing seed sowing device, so an adjustable seed cleaning system of the vegetable sowing machine is designed.

In order to solve the problems that the reseeding rate of spherical seeds is high when the negative pressure is increased in the vegetable plug seedling precision planter and the reseeding rate of different seeds is high, the seed metering device can increase a certain negative pressure to suck the seeds under normal conditions, so that the seed sucking reliability can be fully ensured, but the situation that the seed metering device sucks the seeds in multiple grains is caused at the same time, the higher reseeding rate is generated, the single-seed precision seeding which can not meet the current agricultural requirements can not be realized, and therefore, under the problems, an adjustable vegetable seeder reseeding system is designed to ensure the realization of the precision seeding of the single-seed.

Disclosure of Invention

For the precision seeding agronomic requirement who realizes multiple vegetable seed, the utility model aims at providing a vegetable planter seed cleaning system with adjustable can practice thrift the cost of labor, improve seeding qualification rate and seed adaptability, improve vegetables precision seeding effect simultaneously.

The utility model consists of a seed sowing device A, a frame B and a seed cleaning device C, wherein the seed sowing device (A) is a vegetable seedling sowing device suitable for the plug specification of 9 x 18; it is characterized in that the left end of a main shaft of the seed sowing device A and a frame IB in a frame B₁The inner ring of the bearing III 9 is in interference connection; the right end of the main shaft of the seed sowing device A and a frame IIB in a frame B₂The inner rings of the bearings III are in interference connection; the holes VI 12 and VII 13 of the left vertical plate 26 of the fixed guide plate 19 in the seed cleaning device C are respectively connected with a stander IB in the stander B₁The holes I2 and II 3 are aligned in center and fixedly connected with a bolt I14 and a bolt II 15, and a hole VIII 24 and a hole IX 25 of a right vertical plate 28 of a fixed guide plate 19 in the seed cleaning device C are respectively connected with a rack IIB in the rack B₂The center of the hole I is aligned with that of the hole II, and the hole I and the hole II are fixedly connected with a bolt IV 23 through a bolt III 22, and the middle part of a left shaft head I37 of a stepped shaft I33 in the seed cleaning device C is connected with a rack IB in a rack B₁The inner ring of the bearing I5 is in interference connection, the right shaft head I40 of the stepped shaft I33 and a rack IIB in the rack B₂The bearing I is in interference connection with the inner ring, and the rack IB₁And frame IIB₂Is a distance L₁500 and 510 mm; the middle part of a left shaft head II 41 of a ladder shaft II 35 in the seed cleaning device C and a rack IB in the rack B₁The inner ring of the bearing II 7 is in interference connection, and the right shaft head II 44 of the stepped shaft II 35 is connected withRack IIB of the racks B₂The inner rings of the bearings II are in interference connection; the gear I32 and the gear II 36 in the seed cleaning device C are meshed with each other; 9 left-handed worm wheels of the left-handed worm wheel set 17 and 9 left-handed worms of the left-handed worm group 30 in the seed cleaning device C are arranged correspondingly and are meshed with each other; in the seed cleaning device C, 9 right-handed worm wheels of the right-handed worm wheel set 16 and 9 right-handed worms of the right-handed worm group 29 are arranged correspondingly and are meshed with each other.

The rack B is composed of a rack IB₁And frame IIB₂Is composed of a machine frame IB₁And frame IIB₂A frame IB which is a symmetrical structure about the central cross section e-e of the seed cleaning system of the adjustable vegetable seeder₁And frame IIB₂The device is composed of a vertical plate 1, a bearing I5, a bearing II 7 and a bearing III 9, wherein a hole V8 is formed in the lower part of the vertical plate 1, and a hole I2, a hole II 3, a hole III 4 and a hole IV 6 are formed in the upper part of the vertical plate 1; the outer ring of the bearing I5 is in interference connection with the hole III 4, the outer ring of the bearing II 7 is in interference connection with the hole IV 6, and the outer ring of the bearing III 9 is in interference connection with the hole V8.

Seed cleaning device C by worm gear subassembly D, up-and-down moving baffle 10, cam follower 11, dextrorotation worm gear group 16, levogyration worm wheel 17, fixed guide 19, vertical slip guide rail group 20, horizontal slip guide rail 21, dextrorotation worm group 29, levogyration worm group 30, manual knob 31, gear I32, step shaft I33, cam 34, step shaft II 35, gear II 36, boss group 45 constitute, wherein: the fixed guide plate 19 consists of a left vertical plate 26, a middle plate 27 and a right vertical plate 28, wherein the left vertical plate 26 is provided with a hole VI 12 and a hole VII 13, and the right vertical plate 28 is provided with a hole VIII 24 and a hole IX 25; the middle upper part of the middle plate 27 is provided with a longitudinal groove 18, the front of the middle plate 27 is provided with 5 longitudinal sliding guide rails of a longitudinal sliding guide rail group 20, and the rear of the middle plate 27 is provided with a transverse sliding guide rail 21; the up-down moving baffle 10 is a rectangular plate, and 5 bosses of the boss group 45 are arranged behind the up-down moving baffle; the cam follower 11 is fixedly connected to the middle of the front of the up-down moving baffle 10; 5 bosses of a boss group 46 in the up-and-down moving baffle 10 are in sliding connection with 5 longitudinal sliding guide rails of a longitudinal sliding guide rail group 20 in the fixed guide plate 19, and the cam follower 11 is suspended in a longitudinal groove 18 of the fixed guide plate 19; the stepped shaft I33 consists of a left shaft head I37, a shaft neck I38, a shaft body I39 and a right shaft head I40, and the stepped shaft II 35 consists of a left shaft head I35The shaft head II 41, the shaft neck II 42, the shaft body II 43 and the right shaft head II 44; the gear I32 is fixedly connected with a shaft neck I38 of the stepped shaft I33, the cam 34 is fixedly connected with the middle part of a shaft body I39 of the stepped shaft I33, the manual knob 31 is fixedly connected with the left end of a left shaft head I37 of the stepped shaft I33, and the gear II 36 is fixedly connected with a shaft neck II 42 of the stepped shaft II 35; the worm and gear assembly D comprises a right-handed worm gear set 16, a left-handed worm gear set 17, a right-handed worm gear set 29 and a left-handed worm gear set 30, 9 right-handed worm gears of the right-handed worm gear set 16 and 9 left-handed worm gears of the left-handed worm gear set 17 are uniformly distributed and are in sliding connection with the transverse sliding

guide rail

21, 9 right-handed worms of the right-handed worm gear set 29 and 9 left-handed worms of the left-handed worm gear set 30 are uniformly distributed and fixedly connected to a shaft body II 43 of the stepped shaft II 35, and the distance L between the right-handed worm gear set 16 and the left-handed worm gear set 17 is L₂Is 10-10.5 mm.

The peripheral contour line of the cam 34 is formed by connecting an ab curve, a bc curve, a cd curve, a de curve and an ea curve in sequence, wherein:

the mathematical expression for the ab curve is: (x-1.6)²+(y+1.65)²＝6.81²；

The mathematical expression of the bc curve is: (x +2.27)²+(y+0.35)²＝10.89²；

The mathematical expression of the cd curve is: (x-1.01)²+(y-2.02)²＝14.91²；

The mathematical expression of the de curve is: (x +7.72)²+(y-4.39)²＝6.12²；

The mathematical expression of the ea curve is: (x +0.45)²+(y-6.3)²＝1.41²。

The utility model discloses the motion process of mechanism as follows:

the manual knob 31 is manually rotated to reach a required angle (30 degrees is 1mm), the right-handed worm group 29 on the stepped shaft II 35 in the seed cleaning device C starts to rotate, the right-handed worm group 16 and the right-handed worm group 29 on the stepped shaft II 35 are in meshed transmission to move leftwards on the transverse sliding guide rail 21, the left-handed worm group 30 on the stepped shaft II 35 also starts to rotate, the left-handed worm group 17 and the left-handed worm group 30 on the stepped shaft II 35 are in meshed transmission to move upwards on the transverse sliding guide rail 21Right hand travel, [ left hand thread feed equation: np θ is 360L₂And (theta is 0-300 DEG, np is 6) the right-hand thread feeding equation is as follows: -np θ ═ 360L₂， (θ＝0～300°，np＝6)]The left-handed worm gear set 17 and the right-handed worm gear set 16 reach designated positions simultaneously, the left-handed worm gear set and the right-handed worm gear set are limited in size of single seeds passing through, the gear I32 and the gear I32 are meshed for transmission in a 1:2 transmission ratio of the gear I32 to the gear II 36, the cam 34 in the middle of the shaft body I39 on the stepped shaft I33 and the gear I32 rotate in the same direction, the cam follower 11 in point contact with the cam 34 moves upwards in the longitudinal groove 18, and the vertically moving baffle 10 fixedly connected with the cam follower 11 moves upwards and downwards on the longitudinal sliding guide rail along with the vertical reciprocating motion of the cam follower 11, so that the height size of single seeds passing through is limited, and the moving distances of the three components, namely the vertically moving baffle 10, the left-handed worm gear set 17 and the right-handed worm gear set 16, form the adjustable three-axis vegetable.

The beneficial effects of the utility model reside in that:

1. can realize the agricultural requirement of single-seed precision sowing of vegetable seeds.

2. The front and back feeding and the cam stroke are realized by adopting the left and right-handed worm and gear, and the accurate and adjustable seed cleaning of seeds of 0.2mm to 10mm can be realized.

Drawings

FIG. 1 is a front view of a seed cleaning system of an adjustable vegetable seeder

FIG. 2 is an axonometric view of the seed cleaning system of the adjustable vegetable seeder

FIG. 3 is a top view of the seed cleaning system of the adjustable vegetable seeder

FIG. 4 is a schematic view of the structure of the frame part (B)

FIG. 5 shows a frame II (B)₂) Schematic structural diagram of

FIG. 6 is a front view of the up-down moving shutter (10)

FIG. 7 is a right side view of the section N-N in FIG. 6

FIG. 8 is a plan view of the vertical movable baffle plate (10)

FIG. 9 is a front view of the stationary guide (10)

FIG. 10 is a right side view of the section M-M in FIG. 8

FIG. 11 is a plan view of the fixed guide (19)

FIG. 12 is a schematic view of the worm and gear assembly (D)

FIG. 13 is a view showing a peripheral contour line structure of the cam 34

FIG. 14 is a schematic view of the seed cleaning device (C)

FIG. 15 is a schematic view of the construction of the stepped shaft I (33)

FIG. 16 is a schematic view of the construction of the stepped shaft II (35)

FIG. 17 is a right side view of section E-E in FIG. 1

Wherein: seed metering device B, rack C, seed cleaning device D, worm and gear assembly B₁Machine frame IB₂The left-handed worm gear set comprises a rack II 1, a vertical plate 2, a hole I3, a hole II 4, a hole III 5, a bearing I6, a hole IV 7, a bearing II 8, a hole V9, a bearing III 10, an up-down moving baffle 11, a cam follower 12, a hole VI 13, a hole VII 14, a bolt I15, a bolt II 16, a right-handed worm gear set 17, a left-handed worm gear 18, a longitudinal groove 19, a fixed guide plate 20, a longitudinal sliding guide rail set 21, a transverse sliding guide rail 22, a bolt III 23, a bolt IV 24, a hole VIII 25, a hole IX 26, a left vertical plate 27, a middle plate 28, a right vertical plate 29, a right-handed worm gear set 30, a left-handed worm set 31, a manual knob 32, a gear I33, a stepped shaft I34, a cam 35, a stepped shaft II 36, a gear II 37, a left shaft I38, a shaft journal I39, a shaft I40, a right shaft I41, a left shaft II 42, a journal II 43.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings.

As shown in fig. 1 to 3 and 17, the utility model comprises a seed sowing device a, a frame B and a seed cleaning device C, wherein the seed sowing device (a) is a vegetable seedling seed sowing device suitable for the plug specification of 9 x 18; it is characterized in that the left end of a main shaft of the seed sowing device A and a frame IB in a frame B₁The inner ring of the bearing III 9 is in interference connection; the right end of the main shaft of the seed sowing device A and a frame IIB in a frame B₂The inner rings of the bearings III are in interference connection; the holes VI 12 and VII 13 of the left vertical plate 26 of the fixed guide plate 19 in the seed cleaning device C are respectively connected with a stander IB in the stander B₁Is aligned with the center of the hole I2 and the hole II 3 and passes through the bolts I14 anda bolt II 15 is fixedly connected, and a hole VIII 24 and a hole IX 25 of a right vertical plate 28 of a fixed guide plate 19 in the seed cleaning device C are respectively connected with a rack IIB in a rack B₂The center of the hole I is aligned with that of the hole II, and the hole I and the hole II are fixedly connected with a bolt IV 23 through a bolt III 22, and the middle part of a left shaft head I37 of a stepped shaft I33 in the seed cleaning device C is connected with a rack IB in a rack B₁The inner ring of the bearing I5 is in interference connection, the right shaft head I40 of the stepped shaft I33 and a rack IIB in the rack B₂The bearing I is in interference connection with the inner ring, and the rack IB₁And frame IIB₂Is a distance L₁500 and 510 mm; the middle part of a left shaft head II 41 of a ladder shaft II 35 in the seed cleaning device C and a rack IB in the rack B₁The inner ring of the bearing II 7 is in interference connection, and the right shaft head II 44 of the stepped shaft II 35 is connected with a rack IIB in the rack B₂The inner rings of the bearings II are in interference connection; the gear I32 and the gear II 36 in the seed cleaning device C are meshed with each other; 9 left-handed worm wheels of the left-handed worm wheel set 17 and 9 left-handed worms of the left-handed worm group 30 in the seed cleaning device C are arranged correspondingly and are meshed with each other; in the seed cleaning device C, 9 right-handed worm wheels of the right-handed worm wheel set 16 and 9 right-handed worms of the right-handed worm group 29 are arranged correspondingly and are meshed with each other.

As shown in fig. 4 and 5, the rack B is composed of a rack ib₁And frame IIB₂Is composed of a machine frame IB₁And frame IIB₂A frame IB which is a symmetrical structure about the central cross section e-e of the seed cleaning system of the adjustable vegetable seeder₁And frame IIB₂The device is composed of a vertical plate 1, a bearing I5, a bearing II 7 and a bearing III 9, wherein a hole V8 is formed in the lower part of the vertical plate 1, and a hole I2, a hole II 3, a hole III 4 and a hole IV 6 are formed in the upper part of the vertical plate 1; the outer ring of the bearing I5 is in interference connection with the hole III 4, the outer ring of the bearing II 7 is in interference connection with the hole IV 6, and the outer ring of the bearing III 9 is in interference connection with the hole V8.

As shown in fig. 6 to 16, the seed cleaning device C comprises a worm and gear assembly D, an up-down moving baffle 10, a cam follower 11, a right-handed worm gear set 16, a left-handed worm gear 17, a fixed guide plate 19, a longitudinal sliding guide set 20, a transverse sliding guide 21, a right-handed worm set 29, a left-handed worm set 30, a manual knob 31, a gear i 32, a stepped shaft i 33, a cam 34, a stepped shaft ii 35, a gear ii 36 and a boss set 45, wherein: the fixed guide plate 19 is composed of a left partThe vertical plate 26, the middle plate 27 and the right vertical plate 28, wherein the left vertical plate 26 is provided with a hole VI 12 and a hole VII 13, and the right vertical plate 28 is provided with a hole VIII 24 and a hole IX 25; the middle upper part of the middle plate 27 is provided with a longitudinal groove 18, the front of the middle plate 27 is provided with 5 longitudinal sliding guide rails of a longitudinal sliding guide rail group 20, and the rear of the middle plate 27 is provided with a transverse sliding guide rail 21; the up-down moving baffle 10 is a rectangular plate, and 5 bosses of the boss group 45 are arranged behind the up-down moving baffle; the cam follower 11 is fixedly connected to the middle of the front of the up-down moving baffle 10; 5 bosses of a boss group 46 in the up-and-down moving baffle 10 are in sliding connection with 5 longitudinal sliding guide rails of a longitudinal sliding guide rail group 20 in the fixed guide plate 19, and the cam follower 11 is suspended in a longitudinal groove 18 of the fixed guide plate 19; the stepped shaft I33 consists of a left shaft head I37, a shaft neck I38, a shaft body I39 and a right shaft head I40, and the stepped shaft II 35 consists of a left shaft head II 41, a shaft neck II 42, a shaft body II 43 and a right shaft head II 44; the gear I32 is fixedly connected with a shaft neck I38 of the stepped shaft I33, the cam 34 is fixedly connected with the middle part of a shaft body I39 of the stepped shaft I33, the manual knob 31 is fixedly connected with the left end of a left shaft head I37 of the stepped shaft I33, and the gear II 36 is fixedly connected with a shaft neck II 42 of the stepped shaft II 35; the worm and gear assembly D comprises a right-handed worm gear set 16, a left-handed worm gear set 17, a right-handed worm gear set 29 and a left-handed worm gear set 30, 9 right-handed worm gears of the right-handed worm gear set 16 and 9 left-handed worm gears of the left-handed worm gear set 17 are uniformly distributed and are in sliding connection with the transverse sliding

guide rail

The mathematical expression of the de curve is:(x+7.72)²+(y-4.39)²＝6.12²；

When the manual knob 31 is manually rotated, the right-handed worm gear set 16 moves leftwards on the transverse sliding guide rail 21 along with the rotation of the right-handed worm gear set 29 on the stepped shaft II 35, the left-handed worm gear set 17 moves rightwards on the transverse sliding guide rail 21 along with the rotation of the left-handed worm gear set 30 on the stepped shaft II 35, and the distance L between the right-handed worm gear set 16 and the left-handed worm gear set 17₂10-10.5mm, so that the top of the phase will not move when the right-handed worm gear set 16 and the left-handed worm gear set move to L2/2.

In the seed cleaning device C, the step shaft I33 plays a role in axially and radially positioning the gear I32, and the step shaft II 35 plays a role in axially and radially positioning the gear II 36.

In the seed cleaning device C, a gear I32 and a gear II 36 are mutually meshed, and the transmission ratio of the gear II 36 to the gear I32 is 2: 1; when the gear II 36 rotates along with the stepped shaft II 35, the gear I32 of the stepped shaft I33 starts to rotate through meshing transmission with the gear II 36, and meanwhile, the cam 34 fixedly connected to the middle part of the shaft body I39 of the stepped shaft I33 also starts to rotate.

The cam follower 11 contacts the cam 34 in a point contact manner, so that the cam follower 11 moves upward in the longitudinal groove 18 as the cam follower 11 rotates.

The cam follower 11 is fixed in the middle of the front of the up-down moving baffle 10, and the 5 bosses of the boss group 46 in the up-down moving baffle 10 are connected with the 5 longitudinal sliding guides of the longitudinal sliding guide group 20 in the fixed guide plate 19 in a sliding manner, so that the up-down moving baffle 10 moves upwards along with the movement of the cam follower 11.

Claims

1. An adjustable seed cleaning system of a vegetable seeder comprises a seed sowing device (A), a frame (B) and a seed cleaning device (C), wherein the seed sowing device (A) is a vegetable seedling seed sowing device suitable for a plug tray with the specification of 9 x 18; it is characterized in that the left end of a main shaft of the seeding unit (A) and a frame I (B) in a frame (B)₁) The inner rings of the bearings III (9) are in interference connection; main shaft right end of seed sowing device (A) and machineFrame II (B) in frame (B)₂) The inner rings of the bearings III are in interference connection; a hole VI (12) and a hole VII (13) of a left vertical plate (26) of a fixed guide plate (19) in the seed cleaning device (C) are respectively connected with a frame I (B) in a frame (B)₁) The center of the hole I (2) and the center of the hole II (3) are aligned and fixedly connected with the bolt I (14) and the bolt II (15), and the hole VIII (24) and the hole IX (25) of a right vertical plate (28) of a fixed guide plate (19) in the seed cleaning device (C) are respectively connected with the frame II (B) in the frame (B)₂) The center of the hole I and the center of the hole II are aligned and fixedly connected with a bolt IV (23) through a bolt III (22), and the middle part of a left shaft head I (37) of a stepped shaft I (33) in the seed cleaning device (C) and a rack I (B) in the rack (B)₁) The inner ring of the bearing I (5) is in interference connection, and the right shaft head I (40) of the stepped shaft I (33) and the frame II (B) in the frame (B) are in interference connection₂) The bearing I is in interference connection with the inner ring, and the machine frame I (B)₁) And a frame II (B)₂) Is a distance L₁500 and 510 mm; the middle part of a left shaft head II (41) of a ladder shaft II (35) in the seed cleaning device (C) and a rack I (B) in the rack (B)₁) The inner ring of the bearing II (7) is in interference connection, and the right shaft head II (44) of the stepped shaft II (35) is connected with the rack II (B) in the rack (B)₂) The inner rings of the bearings II are in interference connection; in the seed cleaning device (C), a gear I (32) and a gear II (36) are meshed with each other; 9 left-handed worm wheels of a left-handed worm wheel set (17) and 9 left-handed worms of a left-handed worm group (30) in the seed cleaning device (C) are arranged correspondingly and meshed with each other; 9 right-handed worm wheels of the right-handed worm wheel set (16) in the seed cleaning device (C) are arranged corresponding to 9 right-handed worms of the right-handed worm group (29) and are meshed with each other.

2. The adjustable vegetable seeder seed cleaning system according to claim 1, wherein: the machine frame (B) is composed of a machine frame I (B)₁) And frame II (B)₂) Is composed of a frame I (B)₁) And frame II (B)₂) A frame I (B) is a symmetrical structure about the central cross section e-e of the seed cleaning system of the adjustable vegetable seeder₁) And frame II (B)₂) The device is composed of a vertical plate (1), a bearing I (5), a bearing II (7) and a bearing III (9), wherein a hole V (8) is formed in the lower part of the vertical plate (1), and a hole I (2), a hole II (3), a hole III (4) and a hole IV (6) are formed in the upper part of the vertical plate (1); the outer ring of the bearing I (5) is in interference connection with the hole III (4), and the outer ring of the bearing II (7) is in interference connection with the hole IV (6)And the outer ring of the bearing III (9) is in interference connection with the hole V (8).

3. The adjustable vegetable seeder seed cleaning system according to claim 1, wherein: clear kind of device (C) by worm gear subassembly (D), reciprocate baffle (10), cam follower (11), dextrorotation worm gear group (16), levogyration worm gear group (17), fixed guide (19), vertical slide rail group (20), horizontal slide rail (21), dextrorotation worm group (29), levogyration worm group (30), manual knob (31), gear I (32), step shaft I (33), cam (34), step shaft II (35), gear II (36), boss group (45) are constituteed, wherein: the fixed guide plate (19) consists of a left vertical plate (26), a middle plate (27) and a right vertical plate (28), the left vertical plate (26) is provided with a hole VI (12) and a hole VII (13), and the right vertical plate (28) is provided with a hole VIII (24) and a hole IX (25); a longitudinal groove (18) is arranged at the middle upper part of the middle plate (27), 5 longitudinal sliding guide rails of the longitudinal sliding guide rail group (20) are arranged in front of the middle plate (27), and a transverse sliding guide rail (21) is arranged behind the middle plate (27); the up-down moving baffle (10) is a rectangular plate, and 5 bosses of a boss group (45) are arranged behind the up-down moving baffle; the cam follower (11) is fixedly connected to the middle of the front surface of the up-and-down moving baffle (10); 5 bosses of a boss group (45) in the up-and-down moving baffle plate (10) are in sliding connection with 5 longitudinal sliding guide rails of a longitudinal sliding guide rail group (20) in the fixed guide plate (19), and the cam follower (11) is suspended in a longitudinal groove (18) of the fixed guide plate (19); the stepped shaft I (33) consists of a left shaft head I (37), a shaft neck I (38), a shaft body I (39) and a right shaft head I (40), and the stepped shaft II (35) consists of a left shaft head II (41), a shaft neck II (42), a shaft body II (43) and a right shaft head II (44); the gear I (32) is fixedly connected with a shaft neck I (38) of the stepped shaft I (33), the cam (34) is fixedly connected with the middle of a shaft body I (39) of the stepped shaft I (33), the manual knob (31) is fixedly connected with the left end of a left shaft head I (37) of the stepped shaft I (33), and the gear II (36) is fixedly connected with a shaft neck II (42) of the stepped shaft II (35); the worm and gear assembly (D) is composed of a right-handed worm gear set (16), a left-handed worm gear set (17), a right-handed worm gear set (29) and a left-handed worm gear set (30), 9 right-handed worm gears of the right-handed worm gear set (16) and 9 left-handed worm gears of the left-handed worm gear set (17) are uniformly distributed and are in sliding connection with the transverse sliding guide rail (21), and 9 right-handed worms of the right-handed worm gear set (29) and 9 left-handed worms of the left-handed worm gear set (30)The worms are uniformly distributed and fixedly connected with a shaft body II (43) of the stepped shaft II (35), and the distance L between the right-handed worm wheel set (16) and the left-handed worm wheel set (17)₂Is 10-10.5 mm.

4. The adjustable vegetable seeder seed cleaning system according to claim 3, wherein: the peripheral contour line of the cam (34) is formed by connecting an ab curve, a bc curve, a cd curve, a de curve and an ea curve in sequence, wherein: