CN221240800U - Automatic seedling taking structure - Google Patents

Abstract

The utility model relates to the technical field of farmland seedling carrying, in particular to an automatic seedling taking structure which comprises a main frame and a transmission belt chain, wherein a first speed reducer is fixedly connected to the inside of the main frame, four upper cross beams are fixedly connected to the top of the main frame, main sliding rails are fixedly connected to the top of each upper cross beam, main bridge frames are slidingly connected to the tops of every two corresponding main sliding rails, and the bottom of each main bridge frame is slidingly connected to the inside of the corresponding seedling taking mechanism. The utility model has two seedling loading mechanisms, two seedling taking mechanisms and two seedling conveying mechanisms, each seedling taking mechanism also comprises eight pneumatic clamping jaws, the device can take a plurality of seedlings at one time and accurately put the seedlings into the seedling cup, reduces the manual operation amount, can realize the simultaneous seedling loading of a plurality of groups of transplanting and gathering, saves time, and is convenient for realizing the automatic feeding of the seedling tray and can prevent the reverse movement effect.

Description

Automatic seedling taking structure

Technical Field

The utility model relates to the technical field of farmland seedling carrying, in particular to an automatic seedling taking structure.

Background

The existing automatic seedling taking machine is mainly used for sowing and cultivating vegetable seedlings, and the existing part of automatic seedling taking machines is less in seedling taking quantity and inconvenient to plant quickly.

Disclosure of utility model

In order to realize that a plurality of groups of transplanting are gathered and simultaneously carry seedlings, the utility model provides an automatic seedling taking structure.

The utility model provides an automatic seedling taking structure which adopts the following technical scheme:

The automatic seedling taking structure comprises a main frame and a transmission belt chain, wherein a first speed reducer is fixedly connected to the inside of the main frame, four upper cross beams are fixedly connected to the top of the main frame, main sliding rails are fixedly connected to the top of each upper cross beam, main bridge frames are slidably connected to the tops of every two corresponding main sliding rails, bottoms of every two main bridge frames are slidably connected to the interiors of corresponding seedling taking mechanisms, two seedling loading mechanisms are rotatably connected to the interiors of the main frame, and two seedling conveying mechanisms are fixedly connected to one side of the main frame; the output shaft of the first speed reducer is in transmission connection with a main transmission shaft, the outer surface of the main transmission shaft is rotationally connected to one side of a main frame, the outer surface of the main transmission shaft is fixedly connected with a front power input wheel set, the inside of the main frame is rotationally connected with two middle transmission shafts and two rear transmission shafts, the outer surfaces of the two middle transmission shafts are fixedly connected with middle wheel sets, and the outer surfaces of the two rear transmission shafts are fixedly connected with rear power wheel sets; the transmission belt chain comprises two belt chains I, two belt chains II, two belt chains III, two belt chains IV and four belt chains V.

By adopting the technical scheme, a plurality of seedlings can be taken through the two groups of seedling taking mechanisms at a time and accurately placed into the seedling cups of the seedling loading mechanism, so that the manual operation amount is reduced, and further, the multiple groups of transplanting and gathering and seedling loading are realized, and the time is saved.

Preferably, one side of the main frame is rotatably connected with two adjusting shafts, two outer surfaces of the adjusting shafts are fixedly connected with adjusting wheels and gears three, the front power input wheel set comprises two large gears and two small gears, the middle wheel set comprises two gears one and two gears two, the rear power wheel set comprises rear power gears, the outer surfaces of the gears three are meshed with the outer surfaces of the corresponding small gears in the inner parts of the corresponding belt chains one, the outer surfaces of the large gears are meshed with the outer surfaces of the corresponding gears one in the inner parts of the corresponding belt chains two, the outer surfaces of the gears two are meshed with the outer surfaces of the corresponding gears one in the inner parts of the corresponding belt chains three, and the outer surfaces of the gears two are meshed with the outer surfaces of the corresponding rear power wheels in the inner parts of the belt chains four.

By adopting the technical scheme, the second speed reducer drives the main transmission shaft to rotate, and then the main transmission shaft drives the adjusting wheel to rotate through meshing, so that the main bridge frame drives the seedling taking mechanism to reciprocate; the rotation of the main transmission shaft drives the two middle transmission shafts and the two rear transmission shafts to rotate, so that the seedling conveying mechanism conveys the plant seedlings to the lower part of the seedling taking mechanism.

Preferably, the bottom of each main bridge is rotatably connected with a deflection beam, the tops of two deflection beams are fixedly connected with auxiliary sliding rails, the seedling taking mechanism comprises eight sliding plates and eight connecting pieces, the tops of every two corresponding sliding plates are slidably connected with the interiors of the corresponding connecting pieces, and one end of each sliding plate is fixedly connected with a pneumatic clamping jaw; the top of each main bridge frame is fixedly connected with an adjusting rod, and the other end of the adjusting rod is fixedly connected to one side of an adjusting wheel; one end of each deflection beam is fixedly connected with an inclined sliding plate.

Through adopting above-mentioned technical scheme, under the restriction of connecting piece, the maximum distance is the length of connecting piece after the sliding plate takes place to slide, and the distance after the sliding plate takes place to slide just is the distance that is the seedling cup when linear arrangement, and the pneumatic clamping jaw of sliding plate snatches the plant seedling and slides to the maximum distance after, and the plant seedling can be loosened to pneumatic clamping jaw, and the plant seedling just drops to the inside of seedling cup this moment.

Preferably, one end of each of the two rear transmission shafts is fixedly connected with a stepping adjusting mechanism and a plate turnover mechanism, one end of each of the two plate turnover mechanisms is fixedly connected with a pulley, and the outer surfaces of the pulleys intermittently slide at the bottom of the inclined slide plate.

By adopting the technical scheme, as the rear transmission shaft rotates, the flap mechanism can drive the pulley to leave the bottom of the inclined slide plate or return to the bottom of the inclined slide plate, as the main transmission shaft rotates, the adjusting wheel drives the main bridge to move through the adjusting rod, namely the inclined slide plate moves along with the rotation of the main transmission shaft, and as the flap mechanism and the inclined slide plate move, when the flap mechanism relatively rotates until the pulley is attached to the inclined slide plate, sliding connection is generated, and when the pulley is not attached to the inclined slide plate any more, sliding connection is not generated between the pulley and the inclined slide plate; when the pulley slides on the bottom of the inclined slide plate, the inclined slide plate drives the deflection beam to rotate along with the supporting force given by the movement of the pulley, so that the gravity centers of the sliding plates on the deflection beam are shifted, and the eight sliding plates slide on the auxiliary sliding rail of the deflection beam; when the pulley is separated from the bottom of the inclined sliding plate, along with the movement of the gravity center of the sliding plate, the eight sliding plates move inwards along with the rotation of the main transmission shaft, so that the eight folded sliding plates are driven by the pneumatic clamping jaw to clamp the plant seedlings delivered by the seedling picking mechanism.

Preferably, the seedling loading mechanism comprises a support, a second speed reducer and a rotating disc, one side of the second speed reducer is fixedly connected to one side of the support, an output shaft of the second speed reducer is in transmission connection with the bottom of the rotating disc, the bottom of the rotating disc is in rotation connection with the top of the support, a plurality of seedling cups are sleeved in the rotating disc along a circumferential array, and each seedling cup is fixedly connected with a timing lock at the bottom.

By adopting the technical scheme, the timing lock is provided with the unlocking and locking time, when the seedling cup rotates and moves to the upper part of the duck tongue type copying seedling planter, the bottom is opened, the inside plant seedlings enter the duck tongue type copying seedling planter, and after the seedling cup rotates to leave the upper part of the duck tongue type copying seedling planter, the bottom is automatically locked, so that the inside plant seedlings are prevented from automatically falling off after being placed.

Preferably, one side of the main frame is fixedly connected with two supporting frames, two seedling feeding shafts are respectively and rotatably connected in the two supporting frames, two gears four are respectively and fixedly connected to the outer surfaces of the four seedling feeding shafts, the outer surfaces of each two corresponding gears four are respectively and fixedly connected with a plurality of equally-spaced partition rods in lap joint with the inner parts of the corresponding belt chains five, and one side of each corresponding belt chain five is fixedly connected with a plurality of equally-spaced partition rods; one end of each seedling feeding shaft is fixedly connected with a tensioning mechanism.

Through adopting above-mentioned technical scheme, a plurality of subregion pole is divided into the small area of a plurality of placing the plant seedling with the surface of belt chain five to along with the removal of belt chain five drive the automatic feed of plant seedling to can prevent that the plant seedling from taking place reverse movement.

Preferably, one end of each of the two step adjusting mechanisms is fixedly connected to the outer surface of the tensioning mechanism.

Through adopting above-mentioned technical scheme, through step by step adjustment mechanism's rotation, drive take-up mechanism and take place to rotate, and then make the plant seedling that the inside placed of belt link five drive subregion pole to be close to the direction removal of dress seedling mechanism.

Preferably, each seedling feeding mechanism is located between the corresponding seedling taking mechanism and the corresponding seedling loading mechanism.

By adopting the technical scheme, the plant seedlings to be cultivated and planted are placed above the seedling conveying mechanism and delivered to the lower part of the seedling taking mechanism, then the plant seedlings are taken away by the seedling taking mechanism and placed in the seedling loading mechanism, and then the seedling loading mechanism is used for planting the seedlings into the soil through the duck tongue type profiling seedling planter.

As the technical scheme of the utility model, the provided hardware setting is only for facilitating the realization of the simultaneous seedling carrying of multiple groups of transplanting assemblies on the basis of hardware facilities, and particularly, the method for realizing the simultaneous seedling carrying of multiple groups of transplanting assemblies is not taken as the object of the technical problem and protection to be solved by the utility model, and meanwhile, the communication methods among devices all adopt the existing communication methods and are not innovation points of the utility model.

In summary, the utility model has the following beneficial technical effects:

1. The device is provided with two seedling loading mechanisms, two seedling taking mechanisms and two seedling conveying mechanisms, each seedling taking mechanism further comprises eight pneumatic clamping jaws, and a speed reducer drives a main transmission shaft to rotate, so that the main bridge frame is driven to reciprocate along the direction of a main sliding rail, the seedling taking mechanisms on the deflection beams of the main bridge frame clamp and take plant seedlings along with the movement to the upper part of the seedling conveying mechanisms, then move to the upper part of the seedling loading mechanisms, and drop the plant seedlings towards the inner part of a seedling cup;

2. The main transmission shaft is meshed with the second belt chain, the third belt chain and the fourth belt chain to drive the stepping adjusting mechanism of the rear transmission shaft and the turning plate mechanism to reciprocate, so that the tensioning mechanism is driven to reciprocate, the seedling feeding shaft is rotated, the fifth belt chain drives a large number of planted seedlings to rotate, the planted seedlings are delivered to the lower part of the seedling taking mechanism through the seedling feeding mechanism, automatic feeding of the seedling trays is facilitated, and reverse movement can be prevented.

Drawings

FIG. 1 is a schematic perspective view of an automatic seedling picking structure according to the present utility model;

FIG. 2 is a schematic diagram showing a three-dimensional structure of an automatic seedling taking structure according to the present utility model;

FIG. 3 is a schematic three-dimensional view of an automatic seedling taking structure according to the present utility model;

FIG. 4 is a schematic diagram of an automatic seedling taking structure in front view;

Fig. 5 is a schematic side view of an automatic seedling taking structure.

Reference numerals illustrate:

1. A main frame; 2. a first speed reducer; 3. a main drive shaft; 4. an upper cross beam; 5. a main slide rail;

6. A main bridge; 7. an adjusting wheel; 8. an adjusting rod; 9. adjusting a power wheel set; 10. a deflection beam;

11. a seedling taking mechanism; 12. a connecting piece; 13. a seedling feeding mechanism; 14. a support frame;

15. A step adjusting mechanism; 16. a flap mechanism; 17. a tensioning mechanism; 18. a front power input wheel set;

19. a middle wheel set; 20. a rear power wheel set; 21. and a seedling loading mechanism.

Detailed Description

The utility model is described in further detail below with reference to fig. 1-5.

The embodiment of the utility model discloses an automatic seedling taking structure.

Referring to fig. 1, 4 and 5, the seedling planting device comprises a main frame 1 and a transmission belt chain, wherein a first speed reducer 2 is fixedly connected to the inside of the main frame 1, universal wheels or tires can be connected to the bottom of the main frame 1 and move on the ground where seedlings are planted, the first speed reducer 2 serves as a power source to drive a main transmission shaft 3 to rotate, and further, two adjusting wheels 7, two middle transmission shafts and two rear transmission shafts are driven to rotate through meshing of gears and belt chains, so that when the adjusting wheels 7 rotate, a seedling taking mechanism 11 is driven by a main bridge 6 to reciprocate along the length direction of a main sliding rail 5, four upper cross beams 4 are fixedly connected to the top of the main frame 1, main sliding rails 5 are fixedly connected to the top of each upper cross beam 4, main bridge 6 are connected to the top of each corresponding main sliding rail 5 in a sliding manner, the bottom of each main bridge 6 is connected to the inside of the corresponding seedling taking mechanism 11 in a sliding manner, two seedling loading mechanisms 21 are connected to the inside of the main frame 1 in a rotating manner, two seedling conveying mechanisms 13 are fixedly connected to one side of the main frame 1, and the seedling conveying mechanisms 13 are loaded with plants to be planted; the output shaft of the first speed reducer 2 is in transmission connection with a main transmission shaft 3, the outer surface of the main transmission shaft 3 can be also connected with two triaxial mechanical arms (known technology), the tail ends of the two mechanical arms are connected with duck tongue type profiling seedling planting devices (known technology), the two duck tongue type profiling seedling planting devices correspond to two seedling loading mechanisms 21, the duck tongue type profiling seedling planting devices do reciprocating motion along with the rotation of the main transmission shaft 3, the highest one can be close to the bottom of a seedling cup, the lowest duck tongue type profiling seedling planting device can be inserted into soil, plant seedlings carried in the lowest duck tongue type profiling seedling planting device are inserted into the soil, so that the plant seedlings are planted in the ground through the duck tongue type profiling seedling planting devices, the outer surface of the main transmission shaft 3 is rotationally connected to one side of a main frame, the outer surface of the main transmission shaft 3 is fixedly connected with a front power input wheel set 18, the inner part of the main frame 1 is rotationally connected with two middle transmission shafts and two rear transmission shafts, the outer surfaces of the two middle transmission shafts are fixedly connected with a middle wheel set 19, and the outer surfaces of the two rear transmission shafts are fixedly connected with a rear power wheel set 20; the transmission belt chain comprises two belt chains I, two belt chains II, two belt chains III, two belt chains IV and four belt chains V.

Referring to fig. 1, 2 and 5, one side of the main frame 1 is rotatably connected with two adjusting shafts, the outer surfaces of the two adjusting shafts are fixedly connected with an adjusting wheel 7 and a gear III, the front power input wheel set 18 comprises two large gears and two small gears, the two middle wheel sets 19 comprise two first gears and two second gears, the outer surfaces of the two third gears are meshed with the outer surfaces of the corresponding small gears in the interior of the corresponding first belt chain, the two large gears of the main transmission shaft 3 are respectively connected with the two adjusting wheels 7 through the first belt chain to form an adjusting power wheel set 9, the length of the adjusting shaft 8 is changed along with the rotation of the adjusting wheels 7, the length of the adjusting shaft 8 is changed to drive the main transmission shaft 6 to slide at the top of the main sliding rail 5, thereby driving the seedling taking mechanism 11 to move towards or away from the seedling conveying mechanism 13, the outer surfaces of the two large gears are meshed with the outer surfaces of the corresponding first belt chain, the four middle gears are meshed with the inner surfaces of the corresponding second belt chain, the first gear and the two middle gears are respectively meshed with the two other gears of the first belt chain and the two other gears through the two other gears are coaxially meshed with the two other two small gears through the two outer surfaces of the first belt chain and the two other gears and the two other two transmission shafts, the two other transmission shafts are meshed with the two other gears are coaxially rotated with the two other two outer surfaces of the first belt gears and the two transmission shafts 2, the outer surfaces of the other two gears II are meshed with the outer surfaces of the corresponding rear power wheels in the belt chain IV.

Referring to fig. 1 and 2, the bottom of each main bridge 6 is rotatably connected with deflection beams 10, the tops of the two deflection beams 10 are fixedly connected with auxiliary sliding rails, the seedling taking mechanism 11 comprises eight sliding plates and eight connecting pieces 12, according to the requirements of actual planting and cultivation, the seedling taking mechanism 11 can be provided with two, five and eight sliding plates and connecting pieces with variable numbers, the tops of every two corresponding sliding plates are slidably connected with the interiors of the corresponding connecting pieces 12, and one end of each sliding plate is fixedly connected with a pneumatic clamping jaw; the top of each main bridge 6 is fixedly connected with an adjusting rod 8, and the other end of the adjusting rod 8 is fixedly connected with one side of an adjusting wheel 7; one end of each deflection beam 10 is fixedly connected with an inclined sliding plate, for one seedling taking mechanism 11, the rotation of the adjusting wheel 7 drives the adjusting rod 8 to stretch, so that the length of the adjusting rod 8 is changed, the seedling taking mechanism 11 moves back and forth along with the main bridge 6, when the seedling taking mechanism 11 is close to the seedling conveying mechanism 13, eight sliding plates are folded together, no gaps are arranged in a straight line, eight pneumatic clamping jaws clamp plant seedlings on the seedling conveying mechanism 13, when the seedling taking mechanism 11 is located right above a seedling cup, eight sliding plate dispersing arrays are arranged in a straight line above the seedling cup, eight pneumatic clamping jaws loosen eight plant seedlings, eight plant seedlings just drop into the eight seedling cups, and along with continuous reciprocating movement of the main bridge 6, the pneumatic clamping jaws also continuously grab the plant seedlings to be conveyed into the seedling cup.

Referring to fig. 2 and 3, one ends of two rear transmission shafts are fixedly connected with a step adjusting mechanism 15 and a turning plate mechanism 16, the rotation of the two rear transmission shafts drives the two step adjusting mechanisms 15 and the two turning plate mechanisms 16 at one ends of the two rear transmission shafts to rotate, one ends of the two turning plate mechanisms 16 are fixedly connected with pulleys, the outer surfaces of the pulleys intermittently slide at the bottom of the inclined sliding plate, the turning plate mechanisms 16 can drive the pulleys to leave the bottom of the inclined sliding plate or return to the bottom of the inclined sliding plate along with the rotation of the rear transmission shafts, the adjusting wheels 7 drive the main bridge 6 to move through adjusting rods 8 along with the rotation of the main transmission shafts 3, namely the inclined sliding plate moves along with the rotation of the main transmission shafts, and as the turning plate mechanisms 16 and the inclined sliding plate move, sliding connection is generated when the turning plate mechanisms 16 relatively rotate until the pulleys are attached to the inclined sliding plate, and when the pulleys are not attached to the inclined sliding plate any more, the two pulleys are not in sliding connection; when the pulley slides on the bottom of the inclined slide plate, the inclined slide plate drives the deflection beam 10 to rotate along with the supporting force given by the movement of the pulley, so that the gravity centers of the sliding plates on the deflection beam 10 are shifted, and eight sliding plates slide on the auxiliary slide rail of the deflection beam 10 and are dispersed on the top of the auxiliary slide rail; when the pulley is separated from the bottom of the inclined slide plate, along with the movement of the gravity center of the slide plate, the eight slide plates move inwards along with the rotation of the main transmission shaft 3, so that the eight folded slide plates are driven by the pneumatic clamping jaw to clamp the plant seedlings delivered by the seedling picking mechanism 11.

Referring to fig. 4 and 5, the seedling loading mechanism 21 comprises a bracket, a speed reducer II and a rotating disc, the speed reducer II drives the rotating disc to rotate, so that the seedling cups rotate along with the rotation of the rotating disc, one side of the speed reducer II is fixedly connected to one side of the bracket, an output shaft of the speed reducer II is in transmission connection with the bottom of the rotating disc, the bottom of the rotating disc is in rotation connection with the top of the bracket, a plurality of seedling cups are sleeved in the rotating disc along a circumferential direction array, the spacing of the seedling cups is equal to the length of the inside of the connecting piece 12, when an electronic clamping jaw is located right above the seedling cups, one seedling cup corresponds to the position right below each plant seedling, the bottom of each seedling cup is fixedly connected with a timing lock (known technology), the bottom of each seedling cup can be opened and closed when the timing lock is in a timing mode, the bottom of the seedling cup can be hinged through a hinge, the bottom of the seedling cup is just slightly higher than the top of the duck tongue type profiling planting device, when the seedling cups are loaded with the plant seedlings move to the top of the duck tongue type profiling device, the seedling cups fall into the inside of the tongue type profiling device along with the circumferential direction array, when the seedling cups are in a vertical state, the bottom of the seedling cups are in a state of the profiling cup is in a state of being connected with the profiling cup through the rotary connection plate, and the top of the profiling cup is in a state of a profiling mode.

Referring to fig. 2 and 3, one side of the main frame 1 is fixedly connected with two supporting frames 14, two seedling feeding shafts are rotatably connected in the two supporting frames 14, two gears four are fixedly connected to the outer surfaces of the four seedling feeding shafts, the outer surfaces of each two corresponding gears four are lapped in the corresponding belt chains five, a plurality of partition rods distributed at equal intervals are fixedly connected to one side of each corresponding belt chain five, at least five seedlings can be placed on the width of each belt chain five on one supporting frame 14, and when the pneumatic clamping jaws grab, all the five seedlings in the same row are grabbed; one end of each seedling feeding shaft is fixedly connected with a tensioning mechanism 17.

Referring to fig. 2 and 3, one ends of the two step adjusting mechanisms 15 are fixedly connected to the outer surface of the tensioning mechanism 17, the rotation of the step adjusting mechanisms 15 drives the tensioning mechanism 17 to rotate, so that the seedling feeding shaft rotates, the belt chain drives the planting seedlings to rotate, and when the planting seedlings are delivered to the lower side of the seedling taking mechanism 11, the pneumatic clamping jaws clamp the planting seedlings.

Referring to fig. 2, 4, 5, each seedling feeding mechanism 13 is located between the corresponding seedling taking mechanism 11 and the corresponding seedling loading mechanism 21.

The implementation principle of the automatic seedling taking structure in the embodiment of the utility model is as follows:

1. The first speed reducer 2 drives the main transmission shaft 3 to rotate, so that the main bridge 6 is driven to reciprocate along the direction of the main sliding rail 5, the seedling taking mechanism 11 on the deflection beam 10 of the main bridge 6 moves to the upper part of the seedling conveying mechanism 13 to clamp plant seedlings, then moves to the upper part of the seedling loading mechanism 21, and plant seedlings are thrown into the seedling cup;

2. The main transmission shaft 3 drives the stepping adjusting mechanism 15 and the turning plate mechanism 16 of the rear transmission shaft to reciprocate through the engagement of the belt chain II, the belt chain III and the belt chain IV, and then drives the tensioning mechanism 17 to reciprocate, so that the seedling feeding shaft rotates, and the belt chain V drives a large number of planting seedlings to rotate, and the planting seedlings are delivered to the lower part of the seedling taking mechanism 11 through the seedling feeding mechanism 13.

The above embodiments are not intended to limit the scope of the present utility model, so: all equivalent changes in structure, shape and principle of the utility model should be covered in the scope of protection of the utility model.

Claims (8)

1. An automatic seedling structure is got to its characterized in that: the seedling feeding device comprises a main frame (1) and a transmission belt chain, wherein a first speed reducer (2) is fixedly connected to the inside of the main frame (1), four upper cross beams (4) are fixedly connected to the top of the main frame (1), main sliding rails (5) are fixedly connected to the tops of the upper cross beams (4), main bridge frames (6) are slidably connected to the tops of the main sliding rails (5) in every two corresponding modes, seedling taking mechanisms (11) are slidably connected to the bottoms of the main bridge frames (6), two seedling loading mechanisms (21) are rotatably connected to the inside of the main frame (1), and two seedling feeding mechanisms (13) are fixedly connected to one side of the main frame (1);

the output shaft of the first speed reducer (2) is in transmission connection with a main transmission shaft (3), the outer surface of the main transmission shaft (3) is rotationally connected to one side of a main frame (1), the outer surface of the main transmission shaft (3) is fixedly connected with a front power input wheel set (18), the inside of the main frame (1) is rotationally connected with two middle transmission shafts and two rear transmission shafts, the outer surfaces of the two middle transmission shafts are fixedly connected with a middle wheel set (19), and the outer surfaces of the two rear transmission shafts are fixedly connected with a rear power wheel set (20);

the transmission belt chain comprises two belt chains I, two belt chains II, two belt chains III, two belt chains IV and four belt chains V.

2. An automatic seedling taking structure according to claim 1, wherein: one side of the main frame (1) is rotationally connected with two adjusting shafts, two outer surfaces of the adjusting shafts are fixedly connected with adjusting wheels (7) and gears III, the front power input wheel set (18) comprises two large gears and two small gears, the middle wheel set (19) comprises two gears I and two gears II, the rear power wheel set (20) comprises rear power gears, the outer surfaces of the gears III are meshed with the outer surfaces of the corresponding small gears in the inner parts of the corresponding belt chains I, the outer surfaces of the large gears are meshed with the outer surfaces of the two corresponding gears I in the inner parts of the corresponding belt chains II, the outer surfaces of the two gears II are meshed with the outer surfaces of the other two corresponding gears I in the inner parts of the corresponding belt chains III, and the outer surfaces of the other two gears II are meshed with the outer surfaces of the corresponding rear power wheels in the inner parts of the belt chains IV.

3. An automatic seedling taking structure according to claim 2, characterized in that: the bottom of each main bridge frame (6) is rotationally connected with deflection beams (10), the tops of two deflection beams (10) are fixedly connected with auxiliary sliding rails, each seedling taking mechanism (11) comprises eight sliding plates and eight connecting pieces (12), the tops of every two corresponding sliding plates are slidably connected to the interiors of the corresponding connecting pieces (12), and one end of each sliding plate is fixedly connected with a pneumatic clamping jaw; the top of each main bridge frame (6) is fixedly connected with an adjusting rod (8), and the other end of the adjusting rod (8) is fixedly connected with one side of an adjusting wheel (7); one end of each deflection beam (10) is fixedly connected with an inclined sliding plate.

4. An automatic seedling taking structure according to claim 3, wherein: one end of each rear transmission shaft is fixedly connected with a stepping adjusting mechanism (15) and a turning plate mechanism (16), one end of each turning plate mechanism (16) is fixedly connected with a pulley, and the outer surface of each pulley intermittently slides at the bottom of the inclined sliding plate.

5. The automated seedling taking structure according to claim 4, wherein: the seedling loading mechanism (21) comprises a support, a second speed reducer and a rotating disc, one side of the second speed reducer is fixedly connected to one side of the support, an output shaft of the second speed reducer is connected to the bottom of the rotating disc in a transmission mode, the bottom of the rotating disc is connected to the top of the support in a rotating mode, a plurality of seedling cups are sleeved in the rotating disc in a circumferential direction array mode, and timing locks are fixedly connected to the bottoms of the seedling cups.

6. An automated seedling taking structure according to claim 5, wherein: two support frames (14) are fixedly connected to one side of the main frame (1), two seedling feeding shafts are rotatably connected to the inner parts of the two support frames (14), two gears four are fixedly connected to the outer surfaces of the four seedling feeding shafts, the outer surfaces of each two corresponding gears four are lapped in the corresponding belt chains five, and a plurality of partition rods distributed at equal intervals are fixedly connected to one side of each corresponding belt chain five; one end of each seedling feeding shaft is fixedly connected with a tensioning mechanism (17).

7. The automated seedling taking structure according to claim 6, wherein: one end of each stepping adjusting mechanism (15) is fixedly connected to the outer surface of the tensioning mechanism (17).

8. An automated seedling taking structure according to claim 7, wherein: each seedling feeding mechanism (13) is positioned between the corresponding seedling taking mechanism (11) and the corresponding seedling loading mechanism (21).