CN118402364B

CN118402364B - Semi-automatic tomato bare seedling transplanting machine and transplanting method thereof

Info

Publication number: CN118402364B
Application number: CN202410881112.6A
Authority: CN
Inventors: 周志涵; 叶秉良; 林致闻; 周海丽; 唐涛; 俞高红
Original assignee: Zhejiang Sci Tech University Changshan Research Institute Co ltd; Zhejiang Sci Tech University ZSTU
Current assignee: Zhejiang Sci Tech University Changshan Research Institute Co ltd; Zhejiang Sci Tech University ZSTU
Priority date: 2024-07-03
Filing date: 2024-07-03
Publication date: 2024-08-23
Anticipated expiration: 2044-07-03
Also published as: CN118402364A

Abstract

The invention discloses a semi-automatic tomato bare seedling transplanting machine and a transplanting method thereof. The invention has two seedling feeding devices arranged on the frame, a seedling planting device arranged under each seedling feeding device, and a soil covering device arranged behind the two seedling planting devices; the bearing plate in the seedling planting device is hinged with the frame through an upper rocker and a lower rocker which are arranged in parallel, the middle part of the lower rocker is hinged with the eccentric wheel eccentric position of the frame through a folding pull rod, the outer sides of two symmetrically arranged planting devices are both hinged with the bearing plate, the inner sides of the two planting devices are both fixedly provided with transmission pins, and the two transmission pins respectively penetrate through two arc notches which are arranged in a splayed shape and are arranged on the bearing plate, and penetrate into rectangular grooves which are formed in sliding rods of sliding pairs formed by the bearing plate. The invention can replace manual work to realize the transplanting work of bare tomato seedlings, reduces manual labor, improves transplanting efficiency, and solves the problem of high production cost caused by the fact that a corresponding tomato pot seedling transplanting machine needs to be equipped with the tomato pot seedlings.

Description

Semi-automatic tomato bare seedling transplanting machine and transplanting method thereof

Technical Field

The invention belongs to the field of agricultural machinery, and particularly relates to a semi-automatic tomato bare seedling transplanting machine and a transplanting method thereof.

Background

Tomato is one of important vegetables widely planted and consumed in the global scope, and development of planting technology of tomato has important significance for guaranteeing food safety and improving agricultural yield. The traditional artificial seedling and transplanting method is difficult to meet the requirements of modern large-scale agricultural production due to high labor intensity and low efficiency.

At present, a seedling transplanting mode is basically adopted for tomato planting, and the tomato transplanting machine is mainly a tomato pot seedling transplanting machine. The tomato pot seedlings are cultivated by adopting a plug seedling cultivation mode, and have the advantages of standardized production, high germination and seedling recovery speed, yield increase, efficiency increase and the like. However, farmers need to purchase seedling trays and matrixes, the corresponding pot seedling transplanting machine has higher price, and for small and medium-sized farmers in tomato planting, the pot seedling transplanting mode has more production links and higher input cost, and the tomato pot seedling transplanting machine corresponding to the seedling raising mode has higher application and popularization difficulty in small and medium-sized vegetable farmers. In comparison, the tomato bare seedling is cultivated by adopting a traditional broadcast seeding seedling cultivation mode, a seedling cultivation plate, a substrate and an additional seedling cultivation infrastructure are not needed, the seedling cultivation mode is mature, seedling cultivation management is simple, and better economic benefits are achieved, but the invention related to the tomato bare seedling transplanting machine is less at present, the tomato bare seedling transplanting is mainly finished by manpower, the manpower is large, and the transplanting efficiency is low.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a semi-automatic tomato bare seedling transplanting machine and a transplanting method thereof.

In order to achieve the above purpose, the present invention adopts the following technical scheme:

The invention relates to a semi-automatic bare tomato seedling transplanting machine which comprises a seedling placing table, a seedling conveying device, a seedling planting device and a transmission device.

The seedling placing table is fixed on the frame, and two seedling conveying devices which are symmetrically arranged are arranged on two sides of the seedling placing table. The seedling conveying device comprises a conveying frame, a first chain transmission mechanism and a seedling supporting plate assembly; the conveying frame is fixed on the frame, the first chain transmission mechanism is arranged in the conveying frame, the driven chain wheel shaft and the driving chain wheel shaft of the first chain transmission mechanism are vertically arranged, and a plurality of seedling supporting plate assemblies which are equidistantly arranged are arranged on a conveying plate chain of the first chain transmission mechanism; the seedling supporting plate assembly comprises a seedling supporting bottom plate with a variable pitch angle; the cross section of the conveying side plate of the conveying frame is a unitary circle, a semicircular notch is formed in one semicircular position of the conveying bottom plate of the conveying frame, and a seedling falling port communicated with the semicircular notch is formed in the outer side of the first chain transmission mechanism.

And seedling planting devices are arranged right below the two seedling conveying devices. The seedling planting device comprises a tilting rod, a receiving plate, a sliding rod, a tension spring, an eccentric wheel, a folding pull rod, an upper rocker, a lower rocker and a planting device; the eccentric wheel and the frame form a revolute pair; one end of the upper rocker and one end of the lower rocker which are arranged at intervals from top to bottom are hinged with the frame, the other end of the upper rocker is hinged with the vertically arranged bearing plate, and the connecting line of the hinging centers of the two ends of the upper rocker is parallel to the connecting line of the hinging centers of the two ends of the lower rocker, and the lengths of the connecting lines are equal; one end of the folding pull rod is hinged with the eccentric position of the eccentric wheel, and the other end of the folding pull rod is hinged with the middle part of the lower rocker; the middle part of the tilting rod is hinged with one end of the bearing plate, which is far away from the upper rocker and the lower rocker; the sliding rod is arranged right below one end of the warping rod, which is close to the upper rocker and the lower rocker, forms a sliding pair in the vertical direction with the bearing plate, is connected with the bearing plate through a tension spring, and is provided with a rectangular groove in the middle part; an impact block is fixed under one end of the frame, which is far away from the upper rocker and the lower rocker, of the tilting rod; two arc notches arranged in a splayed shape are formed in the bearing plate; wherein, the tilted rod, the slide bar, the upper rocker and the lower rocker are all positioned at one side of the bearing plate, two planting devices which are symmetrically arranged are arranged at the other side of the bearing plate, the inner sides of the two planting devices are all fixed with transmission pins which are vertical to the bearing plate, and the outer sides of the two planting devices are all hinged with the bearing plate; the two planting devices are surrounded by a storage Miao Qiang when closed; the transmission pins of the two planting devices penetrate through the two arc-shaped notch and penetrate into the rectangular groove; the diameter of the driving pin is smaller than the height of the rectangular groove, and the sum of the diameters of the two driving pins is smaller than the length of the rectangular groove.

The chain transmission mechanism I of the two seedling feeding devices and the eccentric wheels of the two seedling planting devices are driven by the transmission device arranged on the frame, and when two planting devices of one seedling planting device are positioned at the highest position, the two planting devices of the other seedling planting device are positioned at the lowest position and are in an open state.

Preferably, the conveying bottom plate is provided with a straight notch communicated with the semicircular notch, the first chain transmission mechanism is arranged at the position of the straight notch and comprises a conveying plate chain, a driven chain wheel shaft, a driven chain wheel, a driving chain wheel and a driving chain wheel shaft, the driven chain wheel shaft and the driving chain wheel shaft form a revolute pair with the frame, and the driven chain wheel and the driving chain wheel are respectively fixed on the driven chain wheel shaft and the driving chain wheel shaft and are connected through the conveying plate chain.

Preferably, three sides, except for one side close to the semicircular notch, of the lower surface of the conveying bottom plate, on the seedling falling opening are all fixed with vertically arranged extension plates, and an opening is formed in the bottom end of the conveying side plate, located at the other semicircular position of the unitary circle.

More preferably, the seedling supporting plate assembly comprises an inner side connecting plate, a seedling supporting side plate and a seedling supporting bottom plate, wherein the inner side connecting plate which is vertically arranged is tangent to the conveying plate chain and is fixed with the conveying plate chain, a connecting shaft which is horizontal and vertical to the inner side connecting plate is fixed on the inner side connecting plate, the upper end of the seedling supporting side plate and the connecting shaft form a revolute pair, and the lower end of the seedling supporting side plate is hinged with the seedling supporting bottom plate; the seedling supporting side plates and the seedling supporting bottom plates in the seedling supporting plate assemblies at the semicircular gaps penetrate through the semicircular gaps and are in a vertical state under the action of self gravity, and the lower surfaces of the seedling supporting bottom plates in the seedling supporting plate assemblies on the conveying bottom plates are attached to the upper surfaces of the conveying bottom plates.

Preferably, one end of the warping rod, which is close to the upper rocker and the lower rocker, is provided with an integrally formed semicircular pushing block.

More preferably, the frame is provided with a soil covering device right behind the two seedling planting devices; the earthing device comprises an earthing wheel frame, a square tube, earthing wheel connecting sheets and earthing wheels, wherein two ends of the horizontally arranged square tube are fixed with the frame through the two earthing wheel frames, a pair of earthing wheel connecting sheets are arranged behind two collision blocks on the square tube, a plurality of pairs of holes which are equidistantly arranged are formed in the square tube, and each earthing wheel connecting sheet is fixed on the pair of holes through a bolt and a nut; two earthing wheel connection pieces in each pair of earthing wheel connection pieces are symmetrically and obliquely arranged relative to each other, and each earthing wheel connection piece is hinged with an earthing wheel.

Preferably, seats are fixed on the outer sides of the two seedling feeding devices on the frame, and a traction device is arranged at the front end of the frame; the traction device comprises a traction towing hook and a traction connecting block, and the traction towing hook is fixed on the frame through the traction connecting block.

Preferably, the four corners of the frame are provided with land wheel devices; the land wheel device comprises a land wheel and a land wheel shaft frame, wherein the land wheel shaft frame is fixed on the frame, and the land wheel is hinged on the land wheel shaft frame.

Preferably, the transmission device comprises a first bevel gear pair, a second three-phase asynchronous motor, a second chain transmission mechanism, a reduction gearbox, a bevel gear shaft, a second bevel gear pair, a third chain transmission mechanism and an eccentric shaft, wherein the three-phase asynchronous motor and the shell of the reduction gearbox are both fixed on the frame, the output shaft of the three-phase asynchronous motor is fixed with the input end of the reduction gearbox, the output shaft of the reduction gearbox is connected with the bevel gear shaft through the second chain transmission mechanism, the bevel gear shaft is connected with the eccentric shaft through the third chain transmission mechanism, and the bevel gear shaft and the eccentric shaft are parallel and horizontally arranged and form a revolute pair with the frame; the two eccentric wheels of the two seedling planting devices are fixed at two ends of the eccentric wheel shafts, and the driving chain wheel shafts of the first chain transmission mechanisms are respectively connected with two ends of the bevel gear shafts through the first bevel gear pair and the second bevel gear pair; wherein, three-phase asynchronous motor is by the controller control.

The invention discloses a transplanting method of a semi-automatic tomato bare seedling transplanting machine, which comprises the following steps:

Firstly, connecting a traction device with a tractor, placing tomato bare seedlings on a seedling placing table, and taking two seedling placing personnel on two seats; then the driver starts the tractor, and the tractor drives the frame to advance through the traction device, and simultaneously the transmission device drives the first two chain transmission mechanisms to work and drives the two eccentric wheels to rotate.

When the transmission device drives the two chain transmission mechanisms to work, the two chain transmission mechanisms drive the corresponding seedling supporting plate assemblies to circularly move along a route from the semicircular notch position to the opening position, from the opening position to the seedling falling position and from the seedling falling position to the semicircular notch position. When one seedling supporting plate assembly positioned at the semicircular notch position moves towards the opening position, the corresponding conveying bottom plate is contacted with the seedling supporting side plate of the seedling supporting plate assembly and pushes the seedling supporting side plate to rotate upwards, and along with the movement of the corresponding chain transmission mechanism I, the seedling supporting bottom plate of the seedling supporting plate assembly is dragged onto the conveying bottom plate by the seedling supporting side plate and is attached to the conveying bottom plate; when the seedling supporting plate assembly moves to the opening position, the chain transmission mechanism drives the seedling supporting plate assembly to turn around, the inner connecting plate of the seedling supporting plate assembly deflects outwards to keep the tangential posture of the conveying plate chain, and drives the seedling supporting side plate and the seedling supporting bottom plate to deflect outwards through the corresponding connecting shafts, so that the outer end of the seedling supporting bottom plate attached to the conveying bottom plate penetrates out of the opening, and the inner connecting plate drives the outer end of the seedling supporting bottom plate to retract into the conveying frame through the connecting shafts and the seedling supporting side plate after the chain transmission mechanism drives the seedling supporting plate assembly to complete turning; when the seedling supporting plate assembly moves to the seedling falling opening position, the seedling supporting bottom plate of the seedling supporting plate assembly is separated from the conveying bottom plate, the seedling supporting bottom plate and the corresponding seedling supporting side plates rotate downwards to a vertical state under the action of self gravity, and then the seedling supporting plate assembly enters the semicircular notch position.

When one seedling supporting plate assembly moves to a corresponding conveying bottom plate, the seedling supporting plate assembly, a seedling supporting side plate of the next seedling supporting plate assembly and the conveying side plate form a semi-closed area, and a seedling placing person places a bare tomato seedling in the semi-closed area; along with the continuous work of each chain transmission mechanism, two seedling placing personnel respectively place a tomato bare seedling in each semi-closed area of two seedling conveying devices, and each chain transmission mechanism drives each tomato bare seedling to be conveyed to a seedling falling opening through each seedling supporting plate component. Wherein, the first chain transmission mechanism drives the corresponding seedling supporting plate components to move towards the seedling falling opening at the same speed and opposite direction with the advancing speed of the frame.

When the transmission device drives the two eccentric wheels to rotate, the two eccentric wheels drive the two lower rocking bars to reciprocate up and down in a staggered way, and the lower rocking bars drive the upper rocking bars to reciprocate up and down synchronously through the bearing plates; because the connecting lines of the hinging centers at the two ends of the upper rocking bar and the connecting lines of the hinging centers at the two ends of the lower rocking bar in each seedling planting device are parallel and have the same length, the upper rocking bar, the lower rocking bar, the bearing plate and the rack form a parallelogram mechanism, and then the bearing plate is kept in a vertical state to reciprocate up and down.

In the process of the staggered up-and-down reciprocating swing of the receiving plates of the two seedling planting devices, when the receiving plate in one seedling planting device drives the corresponding two planting devices to move to the highest position, the two planting devices are in a closed state, a seedling storage cavity formed by the closed grooves of the two planting devices is positioned right below a seedling dropping hole of the corresponding seedling conveying device, a bare tomato seedling is carried to the seedling dropping hole by a seedling supporting plate assembly of the seedling conveying device and falls into the seedling storage cavity, the eccentric wheel drives the receiving plate, the two closed planting devices and the bare tomato seedling to move downwards through the lower rocker along with the rotation of the eccentric wheel, one end of the rising rod, which is far away from the upper rocker and one end of the lower rocker, contacts a collision block along with the downward movement of the receiving plate, the tips of the two closed planting devices are inserted into soil at the moment, and move downwards along with the continuous movement of the receiving plate, the upper surface of a rectangular groove on the sliding rod is contacted with two transmission pins and pushes the two transmission pins to move downwards along two circular arc notches, meanwhile, the two transmission pins also slide horizontally along the rectangular groove and back to each other, so that two planting devices are driven to move back to back and dig out a soil pit, when a bearing plate moves to the lowest position, the two planting devices are completely opened, a bare tomato seedling falls into the soil pit, so that the transplanting work of the bare tomato seedling is finished, and meanwhile, the two planting devices in the other seedling planting device move to the highest position and take the bare tomato seedling transported by a seedling supporting plate component of the other seedling conveying device; then the eccentric wheel of the seedling planting device at the highest position drives the bearing plate and the two planting devices with the tomato bare seedlings to move downwards through the corresponding lower rocking rod, so that the transplanting work of the tomato bare seedlings is carried out, meanwhile, the eccentric wheel in the seedling planting device for completing the transplanting work of the tomato bare seedlings drives the bearing plate and the two opened planting devices to move upwards through the corresponding lower rocking rod, the restoring force of the tension spring drives the sliding rod to move upwards, after the sliding rod moves upwards for a certain distance, the lower surface of the rectangular groove on the sliding rod is contacted with the two transmission pins, the two transmission pins are pushed to move upwards along the two circular arc notches, meanwhile, the two transmission pins also slide horizontally along the rectangular groove and oppositely, further, the two planting devices are driven to move oppositely, the two planting devices are closed, and one end of the raising rod close to the upper rocking rod and one end of the lower rocking rod are pushed to rotate upwards, so that the raising rod rotates to the original position, and along with the rotation of the eccentric wheel, the lower rocking rod drives the bearing plate and the two planting devices to move upwards towards the seedling falling opening of the corresponding seedling conveying device, so that the next tomato bare seedlings conveyed by the corresponding seedling conveying device is ready to be picked. When the bare tomato seedlings fall from the seedling falling openings, the extending plates and the corresponding seedling supporting bottom plates correct the falling postures of the bare tomato seedlings, so that the bare tomato seedlings fall into the seedling storage cavity in a vertical state.

Along with the advancing of frame, the crisscross work of transplanting of two seedling devices that send and two seedling devices that plant for each naked seedling of tomato is crisscross to be transplanted in corresponding soil pit, and then accomplishes the grafting work of each naked seedling of tomato, and along with the advancing of frame, the frame drives earthing device and advances, and two pairs of earthing wheels in the earthing device are to the naked Miao Futu of tomato that corresponding seedling device was transplanted, and then accomplish the earthing work of each naked seedling of tomato, thereby accomplish the transplanting work of each naked seedling of tomato.

The invention has the following beneficial effects:

1. The invention can replace manual work to realize the transplanting work of bare tomato seedlings, reduces manual labor, improves transplanting efficiency, and solves the problem of high production cost caused by the fact that a corresponding tomato pot seedling transplanting machine needs to be equipped with the tomato pot seedlings. Specifically, the invention drives the tractor to drive the frame to advance, and manually places a tomato bare seedling in each semi-closed area of the two seedling conveying devices, so that the two seedling conveying devices convey each tomato bare seedling to the corresponding seedling falling opening position, and the conveying work of the tomato bare seedling is realized; further, the two eccentric wheels of the seedling planting devices are driven to rotate through the transmission device, the two eccentric wheels drive the two bearing plates to reciprocate up and down in a staggered mode through the two lower rockers, the two pairs of planting devices are driven to reciprocate up and down in a staggered mode, in the staggered up and down reciprocating mode, when one pair of planting devices moves to the highest position, the two pairs of planting devices are in a closed state, one tomato bare seedling transported to a seedling dropping port by the corresponding seedling conveying device is picked up, the other pair of planting devices carry the other tomato bare seedling to the lowest position, the two pairs of planting devices are in an open state, a soil pit is dug, the tomato bare seedling falls into the soil pit, transplanting work is achieved, then one pair of planting devices at the highest position carry one tomato bare seedling to move downwards, the other pair of planting devices move up and are closed, the next tomato bare seedling transported by the corresponding other pair of planting devices is ready to be picked up, the two bare tomato bare seedlings are alternately transplanted along with slow advancing of the frame and staggered conveying of the two seedling conveying devices, and the two bare seedling conveying devices are covered with soil, so that the transplanting work of the two pairs of bare seedlings are achieved.

2. After each pair of the planting devices moves downwards to be inserted into the soil, the corresponding tilted rod pushes the sliding rod to move downwards, the tension spring stretches, the sliding rod drives the two transmission pins to move downwards along the two circular arc notches through the rectangular grooves, the two transmission pins drive the two planting devices to move back to back, so that the two planting devices are opened, when each pair of the planting devices moves upwards, the tension spring pulls the sliding rod to move upwards, and the sliding rod drives the two transmission pins to move upwards along the two circular arc notches through the rectangular grooves, so that the two planting devices are driven to move in opposite directions, and the two planting devices are closed; further, the height of the rectangular groove is larger than the diameter of the transmission pins, so that the rectangular groove is contacted with the two transmission pins after being moved downwards for a certain distance when being moved downwards, and then a corresponding pair of planting devices are opened after entering soil for a certain depth, so that bare tomato seedlings can fall into soil pits with enough depth, the survival rate of the bare tomato seedlings is improved, the rectangular groove is contacted with the two transmission pins after being moved upwards for a certain distance when being moved upwards, and then the corresponding pair of planting devices are closed after being moved upwards for a certain distance, so that the planting devices are kept in an opened state all the time before being completely separated from the bare tomato seedlings, the bare tomato seedlings are prevented from being damaged by clamping, the damage rate of the bare tomato seedlings is reduced, and the survival rate of the bare tomato seedlings is further improved.

3. According to the invention, the chain transmission mechanism drives the seedling supporting plate assemblies to move towards the seedling falling opening at the same speed and in opposite directions with the advancing speed of the frame, so that the horizontal speed of the tomato bare seedling falling is smaller, and the upright degree of the tomato bare seedling falling into Chu Miaoqiang is improved; further, in the falling process of the tomato bare seedlings, the extending plate and the corresponding seedling supporting bottom plate correct the falling postures of the tomato bare seedlings, so that the tomato bare seedlings fall into the seedling storage cavity in a vertical state, and the erection degree of the tomato bare seedlings falling into the seedling storage cavity is further improved.

Drawings

Fig. 1 is a schematic diagram of the overall structure of the present invention.

Fig. 2 is a front view of fig. 1.

Fig. 3 is a side view of fig. 1.

Fig. 4 is a schematic diagram of the overall structure of the present invention.

Fig. 5 is a schematic structural view of a seedling feeding device in the present invention.

Fig. 6 is a schematic structural view of the seedling supporting plate assembly in the invention.

Fig. 7 is a schematic structural view of a conveying frame in the present invention.

Fig. 8 is a schematic structural view of the eccentric shaft and two seedling planting devices according to the present invention.

FIG. 9 is a schematic view of the structure of the tilting lever, the receiving plate, the sliding lever, the tension spring, the planter, a portion of the upper rocker and a portion of the lower rocker of the present invention.

Detailed Description

The invention is further described below with reference to the accompanying drawings.

As shown in fig. 1, the semi-automatic tomato bare seedling transplanting machine comprises a seedling placing table 1, a seedling feeding device 2, a traction device 3, a seat 4, a frame 5, a seedling planting device 6, a soil covering device 7, a land wheel device 8 and a transmission device 9.

The seedling placing table 1 is fixed on the frame 5, and two seedling feeding devices 2 which are symmetrically arranged are arranged on two sides of the seedling placing table 1. As shown in fig. 5, 6 and 7, the seedling feeding device 2 comprises a conveying frame 2-1, a chain transmission mechanism I and a seedling supporting plate assembly 2-7; the conveying frame 2-1 is fixed on the frame 5, the first chain transmission mechanism is arranged in the conveying frame 2-1, the driven chain wheel shaft 2-3 and the driving chain wheel shaft 2-6 of the first chain transmission mechanism are vertically arranged, and a plurality of seedling supporting plate assemblies 2-7 which are equidistantly arranged are arranged on the conveying plate chain 2-2 of the first chain transmission mechanism; the seedling supporting plate assembly 2-7 comprises an inner side connecting plate 2-7a, a seedling supporting side plate 2-7d and a seedling supporting bottom plate 2-7b, wherein the inner side connecting plate 2-7a is tangent to the conveying plate chain 2-2 and is fixed with the conveying plate chain 2-2, a connecting shaft which is horizontal and vertical to the inner side connecting plate 2-7a is fixed on the inner side connecting plate 2-7a, the upper end of the seedling supporting side plate 2-7d and the connecting shaft form a revolute pair, and the lower end of the seedling supporting side plate is hinged with the seedling supporting bottom plate 2-7 b; the cross section of a conveying side plate of the conveying frame 2-1 is a unitary circle (the unitary circle is formed by a rectangle and two semicircles positioned at two ends of the rectangle), a semicircular notch is formed in one semicircular position of a conveying bottom plate 2-1a of the conveying frame 2-1, a rectangular opening 2-1b communicated with the semicircular notch is formed in the outer side of a first chain transmission mechanism, the rectangular opening 2-1b is a seedling dropping opening, three edges, except for one edge close to the semicircular notch, of the lower surface of the conveying bottom plate 2-1a are respectively fixed with an extending plate 2-1c which is vertically arranged, an opening 2-1d is formed in the other semicircular position of the unitary circle at the bottom end of the conveying side plate, and the opening 2-1d is used for preventing the seedling holding bottom plate 2-7b from interfering with the conveying side plate when moving to the turning position of the conveying side plate; the seedling supporting side plates 2-7d and the seedling supporting bottom plates 2-7b in the seedling supporting plate assemblies 2-7 positioned at the semicircular gaps penetrate through the semicircular gaps and are in a vertical state under the action of self gravity, and the lower surfaces of the seedling supporting bottom plates 2-7b in the seedling supporting plate assemblies 2-7 positioned on the conveying bottom plates 2-1a are attached to the upper surfaces of the conveying bottom plates 2-1 a.

Seedling planting device 6 is arranged under two seedling feeding devices 2. As shown in fig. 1, 8 and 9, the seedling planting device 6 comprises a tilting rod 6-1, a bearing plate 6-2, a sliding rod 6-3, a tension spring 6-4, an eccentric wheel 6-5, a folding and pulling rod 6-6, an upper rocker 6-7, a lower rocker 6-9, a planting device 6-10 and a collision block 6-11; the eccentric wheel 6-5 and the frame 5 form a revolute pair; one end of each of the upper rocker 6-7 and the lower rocker 6-9 which are arranged at intervals from top to bottom is hinged with the frame 5, the other end is hinged with the vertically arranged bearing plate 6-2, and the connecting line of the hinging centers of the two ends of the upper rocker 6-7 is parallel to the connecting line of the hinging centers of the two ends of the lower rocker 6-9 and has the same length; one end of the folding pull rod 6-6 is hinged with the eccentric position of the eccentric wheel 6-5, and the other end is hinged with the middle part of the lower rocker 6-9; the middle part of the warping rod 6-1 is hinged with one end, far away from the upper rocker 6-7 and the lower rocker 6-9, of the bearing plate 6-2; the sliding rod 6-3 is arranged under one end of the warping rod 6-1, which is close to the upper rocker 6-7 and the lower rocker 6-9, forms a sliding pair in the vertical direction with the bearing plate 6-2, is connected with the bearing plate 6-2 through the tension spring 6-4, and is provided with a rectangular groove in the middle part of the sliding rod 6-3; the collision block 6-11 is arranged under one end of the tilting rod 6-1 far away from the upper rocking rod 6-7 and the lower rocking rod 6-9 and is fixed on the frame 5; two arc notches arranged in a splayed shape are formed in the bearing plate 6-2; wherein, the warping rod 6-1, the sliding rod 6-3, the upper rocking rod 6-7 and the lower rocking rod 6-9 are all positioned at one side of the bearing plate 6-2, two planting devices 6-10 which are symmetrically arranged are arranged at the other side of the bearing plate 6-2, the inner sides of the two planting devices 6-10 are all fixed with transmission pins which are vertical to the bearing plate 6-2, and the outer sides are hinged with the bearing plate 6-2; the two planting devices 6-10 are surrounded by a storage Miao Qiang when closed; the transmission pins of the two planting devices 6-10 pass through the two arc notches and penetrate into the rectangular grooves; the diameter of the driving pin is smaller than the height of the rectangular groove, and the sum of the diameters of the two driving pins is smaller than the length of the rectangular groove.

The outer sides of the two seedling feeding devices 2 on the frame 5 are respectively fixed with a seat 4, and a soil covering device 7 is arranged right behind the two seedling planting devices 6; the traction device 3 is arranged at the front end of the frame 5 and is used for being connected with a tractor; the four corners of the frame 5 are provided with land wheel devices 8; wherein, the chain transmission mechanism I of the two seedling feeding devices 2 and the eccentric wheels 6-5 of the two seedling planting devices 6 are driven by a transmission device 9 arranged on the frame 5, when the two planting devices 6-10 of one seedling planting device 6 are positioned at the highest position, the two planting devices 6-10 of the seedling planting device 6 are in a closed state, and the two planting devices 6-10 of the other seedling planting device 6 are positioned at the lowest position and are in an open state.

As a preferred embodiment, a straight notch communicated with a semicircular notch is formed in the conveying bottom plate 2-1a, a first chain transmission mechanism is arranged at the position of the straight notch and comprises a conveying plate chain 2-2, a driven chain wheel shaft 2-3, a driven chain wheel 2-4, a driving chain wheel 2-5 and a driving chain wheel shaft 2-6, the driven chain wheel shaft 2-3 and the driving chain wheel shaft 2-6 form a revolute pair with the frame 5, and the driven chain wheel 2-4 and the driving chain wheel 2-5 are respectively fixed on the driven chain wheel shaft 2-3 and the driving chain wheel shaft 2-6 and are connected through the conveying plate chain 2-2.

As a preferred embodiment, the seedling supporting side plates 2-7d are hinged with the seedling supporting bottom plates 2-7b through hinges 2-7 c.

As a preferred embodiment, one end of the tilting lever 6-1, which is close to the upper rocker 6-7 and the lower rocker 6-9, is provided with an integrally formed semicircular pushing block, and the semicircular pushing block is used for reducing friction between the tilting lever 6-1 and the sliding lever 6-3.

As a preferred embodiment, the upper rocker 6-7 and the lower rocker 6-9 are hinged with two rocker connectors 6-8, respectively, fixed on the frame 5.

As a preferred embodiment, the two sides of the seedling placing table 1, which are close to the two seedling conveying devices 2, are downwards inclined, so that seedlings can be conveniently taken by seedling placing personnel.

As a preferred embodiment, as shown in FIG. 2, the earthing device 7 comprises an earthing wheel frame 7-1, square tubes 7-2, earthing wheel connecting pieces 7-3 and earthing wheels 7-4, wherein two ends of the horizontally arranged square tubes 7-2 are fixed with the frame 5 through the two earthing wheel frames 7-1, a pair of earthing wheel connecting pieces 7-3 are detachably fixed on the square tubes 7-2 at the rear of the two collision blocks 6-11, and two earthing wheel connecting pieces 7-3 in each pair of earthing wheel connecting pieces 7-3 are symmetrically and obliquely arranged relative to each other, and each earthing wheel connecting piece 7-3 is hinged with the earthing wheel 7-4.

More preferably, the square tube 7-2 is provided with a plurality of pairs of holes which are equidistantly arranged, each earthing wheel connecting sheet 7-3 is fixed on one pair of holes through a bolt and a nut, and the distance between the corresponding pair of earthing wheels 7-4 can be adjusted by adjusting the fixing position of each pair of earthing wheel connecting sheets 7-3.

As a preferred embodiment, as shown in fig. 3, the traction device 3 includes a traction hitch 3-1 and a traction connection block 3-2, and the traction hitch 3-1 is fixed to the frame 5 through the traction connection block 3-2.

As a preferred embodiment, the ground wheel apparatus 8 includes a ground wheel 8-1 and a ground wheel axle frame 8-2, the ground wheel axle frame 8-2 being fixed to the frame 5, the ground wheel 8-1 being hinged to the ground wheel axle frame 8-2.

As a preferred embodiment, as shown in FIG. 4, the transmission device 9 comprises a first bevel gear pair 9-1, a three-phase asynchronous motor 9-2, a second chain transmission mechanism 9-3, a reduction gearbox 9-4, a bevel gear shaft 9-5, a second bevel gear pair 9-8, a third chain transmission mechanism 9-6 and an eccentric shaft 9-7, wherein the three-phase asynchronous motor 9-2 and the shell of the reduction gearbox 9-4 are fixed on the frame 5, the output shaft of the three-phase asynchronous motor 9-2 is fixed with the input end of the reduction gearbox 9-4, the output shaft of the reduction gearbox 9-4 is connected with the bevel gear shaft 9-5 through the second chain transmission mechanism 9-3, the bevel gear shaft 9-5 is connected with the eccentric shaft 9-7 through the third chain transmission mechanism 9-6, and the bevel gear shaft 9-5 and the eccentric shaft 9-7 are parallel and horizontally arranged and form a revolute pair with the frame 5; the eccentric wheels 6-5 of the two seedling planting devices 6 are fixed at two ends of the eccentric wheel shafts 9-7, and the driving chain wheel shafts 2-6 of the two chain transmission mechanisms I are respectively connected with two ends of the bevel gear shafts 9-5 through a bevel gear pair I9-1 and a bevel gear pair II 9-8; wherein the three-phase asynchronous motor 9-2 is controlled by a controller.

Firstly, connecting a traction device 3 with a tractor, placing tomato bare seedlings on a seedling placing table 1, and taking two seedling placing personnel on two seats 4; then the driver starts the tractor, the tractor drives the frame 5 and each land wheel device 8 to advance through the traction device 3, and meanwhile the transmission device 9 drives the two chain transmission mechanisms to work and drives the two eccentric wheels 6-5 to rotate.

When the transmission device 9 drives the two chain transmission mechanisms to work, the two chain transmission mechanisms drive the corresponding seedling supporting plate assemblies 2-7 to move from the semicircular notch position to the opening 2-1d position, move from the opening 2-1d position to the seedling falling port position and then move from the seedling falling port position to the semicircular notch position in a circulating manner. When one seedling supporting plate assembly 2-7 positioned at the semicircular notch position moves towards the position of the opening 2-1d, the corresponding conveying bottom plate 2-1a is contacted with the seedling supporting side plate 2-7d of the seedling supporting plate assembly 2-7 and is pushed to rotate upwards, and along with the movement of the corresponding chain transmission mechanism I, the seedling supporting bottom plate 2-7b of the seedling supporting plate assembly 2-7 is dragged onto the conveying bottom plate 2-1a by the seedling supporting side plate 2-7d and is attached to the conveying bottom plate 2-1 a; when the seedling supporting plate assembly 2-7 moves to the position of the opening 2-1d, the chain transmission mechanism drives the seedling supporting plate assembly 2-7 to turn around, the inner side connecting plate 2-7a of the seedling supporting plate assembly 2-7 deflects outwards to keep a tangential posture with the conveying plate chain 2-2, and drives the seedling supporting side plate 2-7d and the seedling supporting bottom plate 2-7b to deflect outwards through corresponding connecting shafts, so that the outer end of the seedling supporting bottom plate 2-7b attached to the conveying bottom plate 2-1a penetrates out of the opening 2-1d, the seedling supporting bottom plate 2-7b is prevented from interfering with the conveying side plate when the seedling supporting plate assembly 2-7 turns around, and the inner side connecting plate 2-7a drives the outer end of the seedling supporting bottom plate 2-7b to retract into the conveying frame 2-1 through the connecting shafts and the seedling supporting side plate 2-7d after the chain transmission mechanism drives the seedling supporting plate assembly 2-7 to finish turning around; when the seedling supporting plate assembly 2-7 moves to the seedling falling opening position, the seedling supporting bottom plate 2-7b of the seedling supporting plate assembly 2-7 is separated from the conveying bottom plate 2-1a, the seedling supporting bottom plate 2-7b and the corresponding seedling supporting side plate 2-7d rotate downwards to be in a vertical state under the action of self gravity, and then the seedling supporting plate assembly 2-7 enters the semicircular notch position.

When one seedling supporting plate assembly 2-7 moves to the corresponding conveying bottom plate 2-1a during operation of each chain transmission mechanism I, a semi-closed area is formed by the seedling supporting plate assembly 2-7, the seedling supporting side plate 2-7d of the subsequent seedling supporting plate assembly 2-7 and the conveying side plate, and a seedling placing person places a tomato bare seedling in the semi-closed area; along with the continuous operation of the chain transmission mechanisms, two seedling placing personnel respectively place a tomato bare seedling in each semi-closed area of the two seedling conveying devices 2, and the chain transmission mechanisms drive the tomato bare seedlings to be conveyed to the seedling falling opening through the seedling supporting plate assemblies 2-7.

When the transmission device 9 drives the two eccentric wheels 6-5 to rotate, the two eccentric wheels 6-5 drive the two lower rocking bars 6-9 to reciprocate up and down in a staggered way, and the lower rocking bars 6-9 drive the upper rocking bars 6-7 to reciprocate up and down synchronously through the bearing plate 6-2; because the connecting lines of the hinging centers at the two ends of the upper rocking rod 6-7 and the connecting lines of the hinging centers at the two ends of the lower rocking rod 6-9 in each seedling planting device 6 are parallel and equal in length, the upper rocking rod 6-7, the lower rocking rod 6-9, the bearing plate 6-2 and the frame 5 form a parallelogram mechanism, and further the bearing plate 6-2 is kept in a vertical state to reciprocate up and down.

In the process of the staggered up-and-down reciprocating swing of the receiving plates 6-2 of the two seedling planting devices 6, when the receiving plate 6-2 in one seedling planting device 6 drives the corresponding two planting devices 6-10 to move to the highest position, the two planting devices 6-10 are in a closed state, a seedling storage cavity formed by closing the two planting devices 6-10 is positioned under a seedling falling opening of the corresponding seedling conveying device 2, a bare tomato seedling is carried to the seedling falling opening by one seedling supporting plate component 2-7 of the seedling conveying device 2 and falls into the seedling storage cavity from the seedling falling opening, the eccentric wheel 6-5 drives the receiving plate 6-2, the two planting devices 6-10 and the bare tomato seedling to move downwards through the lower rocker 6-9 along with the rotation of the eccentric wheel 6-5, With the downward movement of the bearing plate 6-2, one end of the tilted rod 6-1 far away from the upper rocker 6-7 and the lower rocker 6-9 contacts the collision block 6-11, the tips of the two closed planting devices 6-10 are inserted into the soil at the moment, with the continued downward movement of the bearing plate 6-2, one end of the tilted rod 6-1 close to the upper rocker 6-7 and the lower rocker 6-9 rotates downwards to contact with the slide rod 6-3 and push the slide rod 6-3 to slide downwards, the tension spring 6-4 stretches, after the slide rod 6-3 moves downwards for a certain distance (the difference between the height of the rectangular groove and the diameter of the transmission pin), the upper surface of the rectangular groove on the slide rod 6-3 contacts with the two transmission pins and pushes the two transmission pins to move downwards along the two circular arc notches, Simultaneously, the two transmission pins also slide horizontally along the rectangular grooves and back to back, so that the two planting devices 6-10 are driven to move back to back, a soil pit is dug, when the bearing plate 6-2 moves to the lowest position, the two planting devices 6-10 are completely opened, a bare tomato seedling falls into the soil pit, so that the transplanting work of the bare tomato seedling is completed, and simultaneously, the two planting devices 6-10 in the other seedling device 6 move to the highest position and take another bare tomato seedling transported by one seedling supporting plate assembly 2-7 of the other seedling conveying device 2; Then the eccentric wheel 6-5 of the seedling planting device 6 at the highest position drives the bearing plate 6-2 and the two planting devices 6-10 which are connected with the bare tomato seedlings to move downwards through the corresponding lower rocking rod 6-9 to carry out the transplanting work of the bare tomato seedlings, meanwhile, the eccentric wheel 6-5 in the seedling planting device 6 which completes the transplanting work of the bare tomato seedlings drives the bearing plate 6-2 and the two opened planting devices 6-10 to move upwards through the corresponding lower rocking rod 6-9, the restoring force of the tension spring 6-4 drives the sliding rod 6-3 to move upwards, after the sliding rod 6-3 moves upwards for a certain distance, the lower surface of the rectangular groove on the sliding rod 6-3 is contacted with the two transmission pins, and the two transmission pins are pushed to move upwards along the two arc notches, Simultaneously, the two transmission pins also slide horizontally and oppositely along the rectangular groove, so that the two planting devices 6-10 are driven to move oppositely, the two planting devices 6-10 are closed, one ends of the warping rods 6-1, which are close to the upper rocking rods 6-7 and the lower rocking rods 6-9, are pushed to rotate upwards, the warping rods 6-1 are enabled to rotate to the original positions, and along with the rotation of the eccentric wheels 6-5, the lower rocking rods 6-9 drive the bearing plates 6-2 and the two closed planting devices 6-10 to move upwards towards the seedling falling openings of the corresponding seedling conveying devices 2, so that the next bare tomato seedlings transported by the corresponding seedling conveying devices 2 are ready to be picked up. When the bare tomato seedlings fall from the seedling falling opening, the extending plates 2-1c and the corresponding seedling supporting bottom plates 2-7b correct the falling postures of the bare tomato seedlings, so that the bare tomato seedlings fall into the seedling storage cavity in a vertical state, and the chain transmission mechanisms drive the corresponding seedling supporting plate assemblies 2-7 to move at the seedling falling opening in the same direction and in the opposite direction as the advancing speed of the frame 5, so that the horizontal speed of the bare tomato seedlings in falling is low, and the upright degree of the bare tomato seedlings after falling into Chu Miaoqiang is further improved.

Along with the advancing of the frame 5, the staggered conveying of the two seedling conveying devices 2 and the staggered transplanting work of the two seedling planting devices 6, the bare tomato seedlings are transplanted in corresponding soil pits in a staggered manner, so that the transplanting work of the bare tomato seedlings is finished, along with the advancing of the frame 5, the frame 5 drives the earthing device 7 to advance, and two pairs of earthing wheels 7-4 in the earthing device 7 are used for earthing the bare tomato Miao Futu transplanted by the corresponding seedling planting devices 6, so that the earthing work of the bare tomato seedlings is finished, and the transplanting work of the bare tomato seedlings is finished.

Claims

1. The utility model provides a semi-automatic naked seedling transplanter of tomato, includes seedling stage, its characterized in that: the seedling planting device also comprises a seedling conveying device, a seedling planting device and a transmission device; a seedling placing table is fixed on the frame, and two seedling conveying devices which are symmetrically arranged are arranged at two sides of the seedling placing table; the seedling conveying device comprises a conveying frame, a first chain transmission mechanism and a seedling supporting plate assembly; the conveying frame is fixed on the frame, the first chain transmission mechanism is arranged in the conveying frame, the driven chain wheel shaft and the driving chain wheel shaft of the first chain transmission mechanism are vertically arranged, and a plurality of seedling supporting plate assemblies which are equidistantly arranged are arranged on a conveying plate chain of the first chain transmission mechanism; the seedling supporting plate assembly comprises a seedling supporting bottom plate with a variable pitch angle; the cross section of the conveying side plate of the conveying frame is a unitary circle, a semicircular notch is formed in one semicircular position of the conveying bottom plate of the conveying frame, and a seedling falling port communicated with the semicircular notch is formed in the outer side of the first chain transmission mechanism;

Seedling planting devices are arranged right below the two seedling conveying devices; the seedling planting device comprises a tilting rod, a receiving plate, a sliding rod, a tension spring, an eccentric wheel, a folding pull rod, an upper rocker, a lower rocker and a planting device; the eccentric wheel and the frame form a revolute pair; one end of the upper rocker and one end of the lower rocker which are arranged at intervals from top to bottom are hinged with the frame, the other end of the upper rocker is hinged with the vertically arranged bearing plate, and the connecting line of the hinging centers of the two ends of the upper rocker is parallel to the connecting line of the hinging centers of the two ends of the lower rocker, and the lengths of the connecting lines are equal; one end of the folding pull rod is hinged with the eccentric position of the eccentric wheel, and the other end of the folding pull rod is hinged with the middle part of the lower rocker; the middle part of the tilting rod is hinged with one end of the bearing plate, which is far away from the upper rocker and the lower rocker; the sliding rod is arranged right below one end of the warping rod, which is close to the upper rocker and the lower rocker, forms a sliding pair in the vertical direction with the bearing plate, is connected with the bearing plate through a tension spring, and is provided with a rectangular groove in the middle part; an impact block is fixed under one end of the frame, which is far away from the upper rocker and the lower rocker, of the tilting rod; two arc notches arranged in a splayed shape are formed in the bearing plate; wherein, the tilted rod, the slide bar, the upper rocker and the lower rocker are all positioned at one side of the bearing plate, two planting devices which are symmetrically arranged are arranged at the other side of the bearing plate, the inner sides of the two planting devices are all fixed with transmission pins which are vertical to the bearing plate, and the outer sides of the two planting devices are all hinged with the bearing plate; the two planting devices are surrounded by a storage Miao Qiang when closed; the transmission pins of the two planting devices penetrate through the two arc-shaped notch and penetrate into the rectangular groove; the diameter of the transmission pin is smaller than the height of the rectangular groove, and the sum of the diameters of the two transmission pins is smaller than the length of the rectangular groove;

2. A semiautomatic tomato bare seedling transplanting machine as claimed in claim 1, characterized in that: the conveying bottom plate is provided with a straight notch communicated with the semicircular notch, the first chain transmission mechanism is arranged at the position of the straight notch and comprises a conveying plate chain, a driven chain wheel shaft, a driven chain wheel, a driving chain wheel and a driving chain wheel shaft, the driven chain wheel shaft and the driving chain wheel shaft form a revolute pair with the frame, and the driven chain wheel and the driving chain wheel are respectively fixed on the driven chain wheel shaft and the driving chain wheel shaft and are connected through the conveying plate chain.

3. A semiautomatic tomato bare seedling transplanting machine as claimed in claim 1, characterized in that: three sides, except for one side close to the semicircular notch, of the lower surface of the conveying bottom plate, which is positioned on the seedling falling port, are respectively fixed with an extending plate which is vertically arranged, and an opening is formed in the position of the other semicircle of the bottom end of the conveying side plate, which is positioned on the unitary circle.

4. A semiautomatic tomato bare seedling transplanting machine as claimed in claim 3, characterized in that: the seedling supporting plate assembly comprises an inner side connecting plate, a seedling supporting side plate and a seedling supporting bottom plate, wherein the inner side connecting plate is tangent to the conveying plate chain and fixed with the conveying plate chain, a connecting shaft which is horizontal and vertical to the inner side connecting plate is fixed on the inner side connecting plate, the upper end of the seedling supporting side plate and the connecting shaft form a revolute pair, and the lower end of the seedling supporting side plate is hinged with the seedling supporting bottom plate; the seedling supporting side plates and the seedling supporting bottom plates in the seedling supporting plate assemblies at the semicircular gaps penetrate through the semicircular gaps and are in a vertical state under the action of self gravity, and the lower surfaces of the seedling supporting bottom plates in the seedling supporting plate assemblies on the conveying bottom plates are attached to the upper surfaces of the conveying bottom plates.

5. A semiautomatic tomato bare seedling transplanting machine as claimed in claim 1, characterized in that: one end of the warping rod, which is close to the upper rocker and the lower rocker, is provided with an integrally formed semicircular pushing block.

6. A semiautomatic tomato bare seedling transplanting machine as claimed in claim 4, characterized in that: the frame is provided with a soil covering device right behind the two seedling planting devices; the earthing device comprises an earthing wheel frame, a square tube, earthing wheel connecting sheets and earthing wheels, wherein two ends of the horizontally arranged square tube are fixed with the frame through the two earthing wheel frames, a pair of earthing wheel connecting sheets are arranged behind two collision blocks on the square tube, a plurality of pairs of holes which are equidistantly arranged are formed in the square tube, and each earthing wheel connecting sheet is fixed on the pair of holes through a bolt and a nut; two earthing wheel connection pieces in each pair of earthing wheel connection pieces are symmetrically and obliquely arranged relative to each other, and each earthing wheel connection piece is hinged with an earthing wheel.

7. A semiautomatic tomato bare seedling transplanting machine as claimed in claim 6, characterized in that: seats are fixed on the outer sides of the two seedling conveying devices on the frame, and a traction device is arranged at the front end of the frame; the traction device comprises a traction towing hook and a traction connecting block, and the traction towing hook is fixed on the frame through the traction connecting block.

8. Semi-automatic tomato bare seedling transplanting machine according to any one of claims 1 to 7, characterized in that: land wheel devices are arranged at four corners of the frame; the land wheel device comprises a land wheel and a land wheel shaft frame, wherein the land wheel shaft frame is fixed on the frame, and the land wheel is hinged on the land wheel shaft frame.

9. Semi-automatic tomato bare seedling transplanting machine according to any one of claims 1 to 7, characterized in that: the transmission device comprises a first bevel gear pair, a three-phase asynchronous motor, a second chain transmission mechanism, a reduction gearbox, a bevel gear shaft, a second bevel gear pair, a third chain transmission mechanism and an eccentric shaft, wherein the shells of the three-phase asynchronous motor and the reduction gearbox are fixed on the frame, an output shaft of the three-phase asynchronous motor is fixed with an input end of the reduction gearbox, an output shaft of the reduction gearbox is connected with the bevel gear shaft through the second chain transmission mechanism, the bevel gear shaft is connected with the eccentric shaft through the third chain transmission mechanism, and the bevel gear shaft and the eccentric shaft are parallel and horizontally arranged and form a revolute pair with the frame; the two eccentric wheels of the two seedling planting devices are fixed at two ends of the eccentric wheel shafts, and the driving chain wheel shafts of the first chain transmission mechanisms are respectively connected with two ends of the bevel gear shafts through the first bevel gear pair and the second bevel gear pair; wherein, three-phase asynchronous motor is by the controller control.

10. The transplanting method of a semi-automatic tomato bare seedling transplanting machine as claimed in claim 7, wherein: the method comprises the following steps:

Firstly, connecting a traction device with a tractor, placing tomato bare seedlings on a seedling placing table, and taking two seedling placing personnel on two seats; then a driver starts the tractor, the tractor drives the frame to advance through the traction device, and meanwhile, the transmission device drives the first two chain transmission mechanisms to work and drives the second eccentric wheels to rotate;

When the transmission device drives the first chain transmission mechanisms to work, the first chain transmission mechanisms drive the corresponding seedling supporting plate assemblies to circularly move along a route from the semicircular notch position to the opening position, from the opening position to the seedling falling position and from the seedling falling position to the semicircular notch position; when one seedling supporting plate assembly positioned at the semicircular notch position moves towards the opening position, the corresponding conveying bottom plate is contacted with the seedling supporting side plate of the seedling supporting plate assembly and pushes the seedling supporting side plate to rotate upwards, and along with the movement of the corresponding chain transmission mechanism I, the seedling supporting bottom plate of the seedling supporting plate assembly is dragged onto the conveying bottom plate by the seedling supporting side plate and is attached to the conveying bottom plate; when the seedling supporting plate assembly moves to the opening position, the chain transmission mechanism drives the seedling supporting plate assembly to turn around, the inner connecting plate of the seedling supporting plate assembly deflects outwards to keep the tangential posture of the conveying plate chain, and drives the seedling supporting side plate and the seedling supporting bottom plate to deflect outwards through the corresponding connecting shafts, so that the outer end of the seedling supporting bottom plate attached to the conveying bottom plate penetrates out of the opening, and the inner connecting plate drives the outer end of the seedling supporting bottom plate to retract into the conveying frame through the connecting shafts and the seedling supporting side plate after the chain transmission mechanism drives the seedling supporting plate assembly to complete turning; when the seedling supporting plate assembly moves to the seedling falling opening position, the seedling supporting bottom plate of the seedling supporting plate assembly is separated from the conveying bottom plate, the seedling supporting bottom plate and the corresponding seedling supporting side plates rotate downwards to a vertical state under the action of self gravity, and then the seedling supporting plate assembly enters the semicircular notch position;

When one seedling supporting plate assembly moves to a corresponding conveying bottom plate, the seedling supporting plate assembly, a seedling supporting side plate of the next seedling supporting plate assembly and the conveying side plate form a semi-closed area, and a seedling placing person places a bare tomato seedling in the semi-closed area; along with the continuous operation of the first chain transmission mechanism, two seedling placing personnel place a tomato bare seedling in each semi-closed area of the two seedling conveying devices, and the first chain transmission mechanism drives each tomato bare seedling to be conveyed to a seedling falling opening through each seedling supporting plate component; wherein, the first chain transmission mechanism drives the corresponding seedling supporting plate components to move towards the seedling falling opening at the same speed and opposite direction with the advancing speed of the frame;

When the transmission device drives the two eccentric wheels to rotate, the two eccentric wheels drive the two lower rocking bars to reciprocate up and down in a staggered way, and the lower rocking bars drive the upper rocking bars to reciprocate up and down synchronously through the bearing plates; because the connecting lines of the hinging centers of the two ends of the upper rocking bar and the hinging centers of the two ends of the lower rocking bar in each seedling planting device are parallel and have the same length, the upper rocking bar, the lower rocking bar, the bearing plate and the rack form a parallelogram mechanism, so that the bearing plate keeps vertical state to reciprocate up and down;

In the process of the staggered up-and-down reciprocating swing of the receiving plates of the two seedling planting devices, when the receiving plate in one seedling planting device drives the corresponding two planting devices to move to the highest position, the two planting devices are in a closed state, a seedling storage cavity formed by the closed grooves of the two planting devices is positioned right below a seedling dropping hole of the corresponding seedling conveying device, a bare tomato seedling is carried to the seedling dropping hole by a seedling supporting plate assembly of the seedling conveying device and falls into the seedling storage cavity, the eccentric wheel drives the receiving plate, the two closed planting devices and the bare tomato seedling to move downwards through the lower rocker along with the rotation of the eccentric wheel, one end of the rising rod, which is far away from the upper rocker and one end of the lower rocker, contacts a collision block along with the downward movement of the receiving plate, the tips of the two closed planting devices are inserted into soil at the moment, and move downwards along with the continuous movement of the receiving plate, the upper surface of a rectangular groove on the sliding rod is contacted with two transmission pins and pushes the two transmission pins to move downwards along two circular arc notches, meanwhile, the two transmission pins also slide horizontally along the rectangular groove and back to each other, so that two planting devices are driven to move back to back and dig out a soil pit, when a bearing plate moves to the lowest position, the two planting devices are completely opened, a bare tomato seedling falls into the soil pit, so that the transplanting work of the bare tomato seedling is finished, and meanwhile, the two planting devices in the other seedling planting device move to the highest position and take the bare tomato seedling transported by a seedling supporting plate component of the other seedling conveying device; then the eccentric wheel of the seedling planting device at the highest position drives the bearing plate and the two planting devices with the tomato bare seedlings to move downwards through the corresponding lower rocking rod, so that the transplanting work of the tomato bare seedlings is carried out, meanwhile, the eccentric wheel in the seedling planting device for completing the transplanting work of the tomato bare seedlings drives the bearing plate and the two opened planting devices to move upwards through the corresponding lower rocking rod, the restoring force of the tension spring drives the sliding rod to move upwards, after the sliding rod moves upwards for a certain distance, the lower surface of the rectangular groove on the sliding rod is contacted with the two transmission pins, the two transmission pins are pushed to move upwards along the two circular arc notches, meanwhile, the two transmission pins also slide horizontally and oppositely along the rectangular groove, so that the two planting devices are driven to move oppositely, the two planting devices are closed, and one end of the raising rod close to the upper rocking rod and one end of the lower rocking rod are pushed to rotate upwards, so that the raising rod rotates to the original position, and along with the rotation of the eccentric wheel, the lower rocking rod drives the bearing plate and the two closed planting devices to move upwards towards the seedling falling opening of the corresponding seedling conveying device, so that the next tomato bare seedlings conveyed by the corresponding seedling conveying device is ready to be picked; when the bare tomato seedlings fall from the seedling falling openings, the extending plates and the corresponding seedling supporting bottom plates correct the falling postures of the bare tomato seedlings, so that the bare tomato seedlings fall into the seedling storage cavity in a vertical state;