CN213343335U

CN213343335U - Sweet potato transplanter

Info

Publication number: CN213343335U
Application number: CN202022224155.7U
Authority: CN
Inventors: 潘志国; 高华德; 刘新鑫; 孙扬; 张有富; 刘兴辉; 刘鑫伟; 李林; 杨然兵; 张健; 张还; 杜宏伟; 匡军
Original assignee: Shandong Huorong Agricultural Technology Development Co ltd; Qingdao Agricultural University; Hainan University
Current assignee: Shandong Huorong Agricultural Technology Development Co ltd; Qingdao Agricultural University; Hainan University
Priority date: 2020-09-30
Filing date: 2020-09-30
Publication date: 2021-06-04
Anticipated expiration: 2030-09-30

Abstract

The utility model relates to the field of crop transplanting machinery, in particular to a sweet potato transplanter, which comprises a frame, a seedling conveying mechanism, a planting device and a lifting adjusting device, wherein the seedling conveying mechanism, the planting device and the lifting adjusting device are arranged on the frame; the seedling conveying mechanism comprises a conveying chain wheel, a conveying chain and a seed conveying groove; the planting device is a link mechanism and is matched with the seedling conveying mechanism; the rack is also provided with a storage disc and a handrail. The utility model adopts the hand-closed flexible seedling protection and transplanting mechanism, which effectively reduces the damage rate of the sweet potato seedlings, enables the sweet potato seedlings to present a ship bottom shape in the soil and increases the yield of the sweet potatoes; the seedling conveying device capable of positioning directionally is adopted, so that the capacity of the clamping hand for acquiring the seedlings is effectively improved, and the stability is good; the height of the machine can be adjusted by utilizing devices such as a single-rod hydraulic cylinder and the like, and the applicability of the machine is increased.

Description

Sweet potato transplanter

Technical Field

The utility model belongs to the technical field of crop transplanting machinery and specifically relates to a sweet potato transplanter.

Background

In the process from sowing to harvesting of the sweet potatoes, the amount of labor for planting and inserting accounts for about one fourth of the whole production process, and is only second to harvesting. At present, most of the sweet potato transplanting modes in China are bare seedling transplanting, the uniqueness of the bare seedling brings certain difficulty to the development of transplanting machinery, the research on the bare seedling transplanting technology is in a slow development state all the time, the sweet potato planting is mainly carried out by manual transplanting for a long time, the labor intensity is high, the efficiency is low, the cost is high, the quality of the sweet potato planting is difficult to maintain, and therefore transplanting equipment suitable for sweet potato planting is urgently needed.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the above problem, a sweet potato transplanter is provided, the technical scheme of its adoption as follows:

a sweet potato transplanter comprises a frame, a seedling conveying mechanism, a planting device and a lifting adjusting device, wherein the seedling conveying mechanism, the planting device and the lifting adjusting device are arranged on the frame; the seedling conveying mechanism comprises a conveying chain wheel, a conveying chain and a conveying seed groove, the conveying chain wheel is rotatably arranged on a conveying fixing frame, the conveying chain is sleeved on the conveying chain wheel, the conveying seed grooves are uniformly and fixedly arranged on the conveying chain at intervals, and a positioning clamp is fixedly arranged on one side of the conveying seed groove, which is far away from the conveying chain; the planting device is a link mechanism and is matched with the seedling conveying mechanism; the rack is also provided with a storage disc and a handrail.

On the basis of the scheme, transmission system includes gear box, bottom gearbox, conveyor drive assembly and plants and insert device drive assembly, the gear box passes through the belt pulley mechanism and is connected with the engine, and the bottom gearbox passes through sprocket structural connection with the gear box to connect through drive structure respectively and carry main axle and rear wheel, conveyor drive assembly sets up respectively carrying main axle and seedling conveying mechanism, planting and inserting between the device with planting device drive assembly, and is the sprocket chain structure respectively.

Preferably, the seed conveying groove further comprises a conveying plate, a side baffle and a chain fixing plate, the positioning clamp is fixedly arranged on the conveying plate, the chain fixing plate is fixedly arranged on one side, close to the conveying chain, of the conveying plate, the chain fixing plate is fixedly connected with the conveying chain, and the side baffle is fixedly arranged at the front end of the conveying plate in the conveying direction.

On the basis of the scheme, the positioning clamps are made of flexible bending plates arranged in pairs, the positioning clamps are Y-shaped, the opening faces the direction far away from the conveying chain, and the number of the positioning clamps is one or more.

Preferably, the outer side of the seed conveying groove is fixedly provided with an outer barrier strip, and the outer barrier strip is fixedly arranged on the side surface of the conveying fixed frame and is parallel to the conveying chain.

Preferably, the transplanting device comprises a crank, a cam, a connecting rod, a lever, a fixing plate, a rolling bearing and two clamping arms, and the two clamping arms are symmetrically arranged; one end of the crank is mounted on the connecting plate and driven by the transmission device to rotate, the other end of the crank is fixedly connected with the cam rotating shaft and drives the cam to rotate, one end of the connecting rod is connected to the rotating shaft of the cam, the other end of the connecting rod is rotatably connected with the middle part of the clamping arm, the middle part of the lever is rotatably connected to the connecting rod, one end of the lever is rotatably connected with the driven wheel and is in contact with the surface of the cam, the other end of the lever is fixedly connected with the fixing plate, and a part, close to the clamping arm, between the; a rolling bearing is arranged on the fixed plate and outside the clamping arm; the contact part of the upper end of the clamping arm and the rolling bearing is a variable cross-section rod, the middle part of the clamping arm is arranged in a contact way, and the lower end of the clamping arm is a flat chuck which can be drawn close to each other.

Preferably, the lifting adjusting device comprises a front wheel connecting rod, a rear wheel connecting rod, a hydraulic cylinder and a movable baffle plate, the front wheel connecting rod is arranged between the two front wheels, and both ends are respectively fixedly connected through the upper end of a front wheel shaft connecting rod, the lower end of the front wheel shaft connecting rod is rotationally connected with the axle center of the front wheel, a rear wheel connecting rod is arranged between two rear wheels, and both ends are respectively fixedly connected through the upper end of a rear wheel shaft connecting rod, the lower end of the rear wheel shaft connecting rod is rotatably connected with the axle center of the rear wheel, the hydraulic cylinder is fixedly arranged with the frame, the movable baffle is fixedly arranged on a piston rod of the hydraulic cylinder, the movable baffle is connected with the rear wheel connecting rod sequentially through a baffle first connecting rod and a baffle second connecting rod, both ends of the baffle first connecting rod are respectively hinged with the upper ends of the movable baffle and the baffle second connecting rod, the lower end of the baffle second connecting rod is fixedly connected with the rear wheel connecting rod, and a movable connecting rod is hinged between the front wheel connecting rod and the rear.

On the basis of the scheme, a piston rod spring is arranged between the movable baffle plate and the cylinder barrel of the hydraulic cylinder, and the piston rod spring is sleeved outside the piston rod of the hydraulic cylinder.

The utility model has the advantages that: by adopting the hand-closing type flexible seedling protection transplanting mechanism, the damage rate of the sweet potato seedlings is effectively reduced, the sweet potato seedlings can be in a ship bottom shape in the soil, and the yield of the sweet potatoes is increased; the seedling conveying device capable of positioning directionally is adopted, so that the capacity of the clamping hand for acquiring the seedlings is effectively improved, and the stability is good; the height of the machine can be adjusted by utilizing devices such as a single-rod hydraulic cylinder and the like, and the applicability of the machine is increased. The utility model discloses small, the convenient operation, the sweet potato transplantation problem in most hilly mountain area can be solved, application method is simple, and the labour is practiced thrift to very big degree, can get into the fritter field and carry out the operation.

Drawings

FIG. 1: the utility model is a schematic overall structure diagram;

FIG. 2: the utility model discloses a left view of the transmission system;

FIG. 3: the utility model discloses a right view of the transmission system;

FIG. 4: the utility model discloses a schematic diagram of the cooperation of a conveying mechanism and an inserting device;

FIG. 5: the structure of the conveying mechanism of the utility model is schematically shown;

FIG. 6: the structure of the seed conveying trough of the utility model is shown schematically;

FIG. 7: the A part structure of the conveying mechanism is enlarged;

FIG. 8: the utility model discloses a schematic structural diagram of a planting device;

FIG. 9: the utility model discloses lift adjustment device schematic structure.

Detailed Description

The invention will be further explained with reference to the following figures and examples:

in the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the description of the present invention, it is to be understood that the terms "center", "length", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

As shown in fig. 1, a sweet potato transplanter comprises a frame 11, a seedling conveying mechanism 3, a transplanting device 4 and a lifting adjusting device 5 which are arranged on the frame 11, wherein a transmission system 2 transmits the power of an engine 12 to the seedling conveying mechanism 3 and the transplanting device 4; the seedling conveying mechanism 3 comprises a conveying chain wheel 33, a conveying chain 34 and a conveying seed groove 35, wherein the conveying chain wheel 33 is rotatably arranged on a conveying fixed frame 32, the conveying chain 34 is sleeved on the conveying chain wheel 33, the conveying seed grooves 35 are fixedly arranged on the conveying chain 34 at uniform intervals, and a positioning clamp 352 is fixedly arranged on one side of the conveying seed groove 35 away from the conveying chain 34; the planting device 4 is a link mechanism and is matched with the seedling conveying mechanism 3; the frame 11 is further provided with a storage tray 14 and a handrail 15, and a protective casing 13 is further arranged above the engine 12. As shown in fig. 2 and fig. 3, the transmission system 2 includes a gear box 22, a bottom gearbox 23, a conveying device transmission assembly 25 and a planting device transmission assembly 26, the gear box 22 is connected with the engine 12 through a belt wheel mechanism 21, the bottom gearbox 23 is connected with the gear box 22 through a chain wheel structure, and is connected with a conveying main shaft 24 and a rear wheel 52 through a transmission structure, respectively, the conveying device transmission assembly 25 and the planting device transmission assembly 26 are respectively arranged between the conveying main shaft 24 and the seedling conveying mechanism 3 and the planting device 4, and are in a chain wheel and chain structure. During operation, the engine 12 drives the whole machine to move forward through the rear wheel 52, meanwhile, the conveying main shaft 24 drives the seedling conveying mechanism 3 and the planting device 4 to operate, an operator takes sweet potato seedlings from the storage tray 14 and places the sweet potato seedlings on the seedling conveying mechanism 3, the seedling conveying mechanism 3 conveys the seedlings to the planting device 4, and the planting device 4 completes planting of the seedlings. The transmission ratio among the mechanisms is ensured through the chain and chain wheel mechanism, so that the action speed and the transmission relation among the mechanisms are ensured, and the action accuracy and the matching degree of the mechanisms are ensured.

As shown in fig. 4 to 7, the seedling conveying mechanism 3 includes a conveying fixing frame 32, a conveying chain wheel 33, a conveying chain 34 and a seed conveying groove 35, the seedling conveying mechanism 3 is connected with the conveying device transmission assembly 25 through a transmission reversing box 311, the transmission reversing box 311 is fixedly mounted on the conveying fixing frame 32 through a reversing box fixing seat 313, power is transmitted to the transmission reversing box 311 through a reversing box input shaft 312, and then the transmission reversing box is connected with and drives the conveying chain wheel 33 to rotate, the conveying chain wheel 33 is rotatably disposed on the conveying fixing frame 32, the conveying chain 34 is sleeved on the conveying chain wheel 33, preferably, the number of the conveying chain 34 is 2, and the conveying chain wheel 33 is sleeved in parallel outside, so as to ensure that the conveying chain 34 can more stably convey the seed conveying groove 35. The seed conveying grooves 35 are uniformly fixed on the conveying chains 34 at intervals, so that the follow-up automatic planting and transplanting device 4 can clamp and plant more conveniently. The side of the seed conveying groove 35 far away from the conveying chain 34 is fixedly provided with positioning clips 352, and the number of the positioning clips 352 can be 1 or more. Preferably, as shown in fig. 6, the seed conveying trough 35 further includes a conveying plate 351, a side baffle 353 and a chain fixing plate 354, the positioning clamp 352 is fixedly arranged on the conveying plate 351, the conveying plate 351 is fixedly provided with the chain fixing plate 354 at a side close to the conveying chain 34, the chain fixing plate 354 is fixedly connected with the conveying chain 34, and the side baffle 353 is fixedly arranged at the front end of the conveying plate 351 along the conveying direction. The operator places the seedling to be planted on the conveying plate 351 and fixes the seedling by the positioning clamp 352, the conveying plate 351 supports the seedling to prevent the seedling from being suspended, and when the seed conveying groove 35 moves to a non-horizontal section, the side baffle 353 supports the seedling. Further, an outer barrier strip 36 is fixedly arranged outside the seed conveying groove 35, the outer barrier strip 36 is fixedly arranged on the side face of the conveying fixing frame 32 and is parallel to the conveying chain 34, so that the seedlings are enclosed by the conveying plate 351, the side baffle 353 and the outer barrier strip 36 in a non-horizontal section, and the positions of the seedlings are fixed by matching with the clamping effect of the positioning clamp 352 to prevent the seedlings from being suspended or shifted. In order to prevent the seedling from being damaged in the clamping and conveying process, the positioning clamp 352 is made of flexible bending plates which are arranged in pairs, the positioning clamp 352 is arranged in a Y shape, the opening faces the direction far away from the conveying chain 34, an operator places the seedling from the Y-shaped opening and enables the seedling to be embedded into the narrow gap at the lower part of the Y-shaped opening, and excessive clamping of the seedling is prevented through elastic action while fixing. Preferably, the transmission track of the conveying chain 34 outside the conveying chain wheel 33 is trapezoidal, the upper and lower sides of the trapezoid are parallel, the length of the upper bottom is longer than that of the lower bottom, an operator can place the seedling at the upper bottom position, and when the seed conveying groove 35 moves to the lower bottom position, the seedling is clamped out of the seed conveying groove 35 by the planting device 4 and planted in the soil. The length of the upper bottom is larger than that of the lower bottom, so that the distance and time for putting seedlings by operators are increased while manufacturing materials are saved, and the seedling leakage is prevented. As shown in fig. 7, the conveying sprocket 33 is connected to the conveying fixing frame 32 through a sprocket telescopic frame 331, the sprocket telescopic frame 311 is detachably connected to the conveying fixing frame 32, and a plurality of matching connection points are arranged between the sprocket telescopic frame 311 and the conveying fixing frame 32, so that the degree of tightness of the conveying chain 34 can be adjusted through the difference of matching positions between the sprocket telescopic frame 311 and the conveying fixing frame 32, and the adjustment can be performed according to actual planting requirements.

As shown in fig. 8, the planting device 4 comprises a crank 42, a cam 43, a connecting rod 44, a lever 45, a fixing plate 46, a rolling bearing 47 and two clamping arms 49, wherein the clamping arms 49 are symmetrically arranged; one end of the crank 42 is arranged on the connecting plate 41 and is driven by the transmission device 2 to rotate, the other end of the crank 42 is fixedly connected with the rotating shaft of the cam 43 and drives the cam 43 to rotate, one end of the connecting rod 44 is connected with the rotating shaft of the cam 43, the other end of the connecting rod 44 is rotatably connected with the middle part of the clamping arm 49, the middle part of the lever 45 is rotatably connected with the connecting rod 44, one end of the lever 45 is rotatably connected with a driven wheel and is in surface contact with the cam 43, the other end of the lever 45 is fixedly connected with the fixing plate 46, and a part between the connecting rod 44 and the lever 45, which is; a rolling bearing 47 is arranged on the fixing plate 46 and outside the clamping arm 49; the contact part of the upper end of the clamping arm 49 and the rolling bearing 47 is a variable cross-section rod. The contact position of the middle part of the clamping arm 49 is provided with an incomplete gear, and the gear engagement position is used as a rotating fulcrum of the clamping arm 49, so that the two clamping arms 49 can be opened and closed simultaneously. The lower ends of the clamping arms 49 are flat clamping heads which can be closed to each other, so as to be convenient for clamping the crop seedlings in the seed groove 32. The lever 45 swings up and down under the drive of the cam 43, drives the fixing plate 46 at the tail end of the lever 45 and the rolling bearing 47 on the fixing plate to move up and down, and accordingly drives the clamping arm 49 to open and close by taking the contact part as a fulcrum; and is returned by the return spring 48 to complete the return of the lever 45 and the gripping arm 49. After the bottom ends of the clamping arms 49 clamp the seed seedlings from the seed conveying grooves 35, the seedlings are planted in soil in a ship bottom shape in an arc-shaped track, and the planting effect is good.

As shown in fig. 9, the lifting adjusting device 5 includes a front wheel link 512, a rear wheel link 522, a hydraulic cylinder 54 and a movable baffle 55, the front wheel link 512 is disposed between two front wheels 51, and two ends of the front wheel link are respectively fixedly connected with the upper end of the front wheel shaft link 511, the lower end of the front wheel shaft link 511 is rotatably connected with the axle center of the front wheel 51, the rear wheel link 522 is disposed between two rear wheels 51, and two ends of the rear wheel shaft link 521 are respectively fixedly connected with the upper end of the rear wheel shaft link 521, the lower end of the rear wheel shaft link 521 is rotatably connected with the axle center of the rear wheel 52, the hydraulic cylinder 54 is fixedly disposed with the frame 11, the movable baffle 55 is fixedly disposed on the piston rod of the hydraulic cylinder 54, the movable baffle 55 is connected with the rear wheel link via a baffle first link 551 and a baffle second link 552 in sequence, two ends of the baffle first link 551 are respectively hinged with the upper ends of the movable baffle 55 and the baffle, a movable connecting rod 53 is hinged between the front wheel connecting rod 512 and the rear wheel connecting rod 522. When the hydraulic cylinder 54 drives the piston rod to drive the movable baffle 55 to move horizontally, the movable baffle 55 drives the baffle second connecting rod 552 to rotate through the baffle first connecting rod 551, so as to drive the rear wheel connecting rod 552 to rotate in the same direction, adjust the angle of the rear wheel shaft connecting rod 521, further adjust the distance between the rear wheel 52 and the frame 11, meanwhile, the rotation of the rear wheel connecting rod 552 drives the movable connecting rod 53 to change the position of the hinged point of the movable connecting rod 53 and the front wheel connecting rod 512, further rotate the front wheel connecting rod 512, and adjust the distance between the front wheel 51 and the frame 11 by changing the angle of the front wheel shaft connecting rod 511, thereby adjusting the height of the frame 11 of the transplanter. Preferably, a piston rod spring 541 is arranged between the movable baffle 55 and the cylinder barrel of the hydraulic cylinder 54, and the piston rod spring 541 is sleeved outside the piston rod of the hydraulic cylinder 54 and is used for damping the movement of the movable baffle 55 and preventing the force change from suddenly acting on the piston rod to damage the hydraulic cylinder 54. A chain transmission mechanism connecting the bottom gearbox 23 and the rear wheel 52 is arranged in the rear wheel shaft connecting rod 521, and the transmission mechanism is protected while the rear wheel 52 is driven to rotate.

The present invention has been described above by way of example, but the present invention is not limited to the above-mentioned embodiments, and any modification or variation based on the present invention is within the scope of the present invention.

Claims

1. A sweet potato transplanter is characterized by comprising a rack (11), a seedling conveying mechanism (3), a planting device (4) and a lifting adjusting device (5), wherein the seedling conveying mechanism (3), the planting device (4) and the lifting adjusting device (5) are arranged on the rack (11), and a transmission system (2) transmits the power of an engine (12) to the seedling conveying mechanism (3) and the planting device (4); the seedling conveying mechanism (3) comprises a conveying chain wheel (33), a conveying chain (34) and a seed conveying groove (35), the conveying chain wheel (33) is rotatably arranged on a conveying fixed frame (32), the conveying chain (34) is sleeved on the conveying chain wheel (33), the seed conveying grooves (35) are uniformly and fixedly arranged on the conveying chain (34) at intervals, and one side, far away from the conveying chain (34), of each seed conveying groove (35) is fixedly provided with a positioning clamp (352); the transplanting device (4) is a link mechanism and is matched with the seedling conveying mechanism (3); the rack (11) is also provided with a storage tray (14) and a handrail (15).

2. The sweet potato transplanter according to claim 1, wherein the transmission system (2) comprises a gear box (22), a bottom gearbox (23), a conveying device transmission assembly (25) and a transplanting device transmission assembly (26), the gear box (22) is connected with the engine (12) through a belt pulley mechanism (21), the bottom gearbox (23) is connected with the gear box (22) through a chain wheel structure and is respectively connected with a conveying main shaft (24) and a rear wheel (52) through a transmission structure, and the conveying device transmission assembly (25) and the transplanting device transmission assembly (26) are respectively arranged between the conveying main shaft (24) and the seedling conveying mechanism (3) and the transplanting device (4) and are respectively in a chain wheel and chain structure.

3. The sweet potato transplanter according to claim 1, wherein the seed conveying trough (35) further comprises a conveying plate (351), a side baffle (353) and a chain fixing plate (354), the positioning clamp (352) is fixedly arranged on the conveying plate (351), the chain fixing plate (354) is fixedly arranged on one side of the conveying plate (351) close to the conveying chain (34), the chain fixing plate (354) is fixedly connected with the conveying chain (34), and the side baffle (353) is fixedly arranged at the front end of the conveying plate (351) along the conveying direction.

4. The sweet potato transplanter according to claim 3, wherein the positioning clips (352) are made of flexible bent plates arranged in pairs, the positioning clips (352) are Y-shaped and open in the direction away from the conveying chain (34), and the number of the positioning clips (352) is one or more.

5. The sweet potato transplanter according to claim 3, wherein an outer barrier (36) is fixedly arranged outside the seed conveying groove (35), and the outer barrier (36) is fixedly arranged on the side surface of the conveying fixing frame (32) and is parallel to the conveying chain (34).

6. The sweet potato transplanter according to claim 1, wherein the transplanting device (4) comprises a crank (42), a cam (43), a connecting rod (44), a lever (45), a fixing plate (46), a rolling bearing (47) and two clamping arms (49), and the clamping arms (49) are symmetrically arranged; one end of the crank (42) is mounted on the connecting plate (41) and driven by the transmission system (2) to rotate, the other end of the crank (42) is fixedly connected with a rotating shaft of the cam (43) and drives the cam (43) to rotate, one end of the connecting rod (44) is connected to the rotating shaft of the cam (43), the other end of the connecting rod (44) is rotatably connected with the middle part of the clamping arm (49), the middle part of the lever (45) is rotatably connected to the connecting rod (44), one end of the lever (45) is rotatably connected with the driven wheel and is in surface contact with the cam (43), the other end of the lever is fixedly connected with the fixing plate (46), and a part, close to the clamping arm (49), between the connecting rod (44) and the lever (45) and a part between; a rolling bearing (47) is arranged on the fixing plate (46) and outside the clamping arm (49); the contact part of the upper end of the clamping arm (49) and the rolling bearing (47) is a variable cross-section rod, the middle part of the clamping arm (49) is arranged in a contact way, and the lower end of the clamping arm (49) is a flat chuck which can be mutually closed.

7. The sweet potato transplanter according to claim 1, wherein the lifting adjusting device (5) comprises a front wheel connecting rod (512), a rear wheel connecting rod (522), a hydraulic cylinder (54) and a movable baffle (55), the front wheel connecting rod (512) is arranged between the two front wheels (51), the two ends of the front wheel connecting rod are fixedly connected with the upper end of the front wheel shaft connecting rod (511) respectively, the lower end of the front wheel shaft connecting rod (511) is rotatably connected with the axle center of the front wheels (51), the rear wheel connecting rod (522) is arranged between the two rear wheels (52), the two ends of the rear wheel connecting rod are fixedly connected with the upper end of the rear wheel shaft connecting rod (521) respectively, the lower end of the rear wheel shaft connecting rod (521) is rotatably connected with the axle center of the rear wheels (52), the hydraulic cylinder (54) is fixedly arranged with the frame (11), the movable baffle (55) is fixedly arranged on the piston rod of the hydraulic cylinder (54), and the movable baffle (55) is connected with the rear wheel connecting rod (522) sequentially through a first baffle connecting rod And two ends of the baffle plate first connecting rod (551) are respectively hinged with the movable baffle plate (55) and the upper end of the baffle plate second connecting rod (552), the lower end of the baffle plate second connecting rod (552) is fixedly connected with the rear wheel connecting rod (522), and a movable connecting rod (53) is hinged between the front wheel connecting rod (512) and the rear wheel connecting rod (522).

8. The sweet potato transplanter according to claim 7, wherein a piston rod spring (541) is disposed between the movable baffle (55) and the cylinder barrel of the hydraulic cylinder (54), and the piston rod spring (541) is sleeved outside the piston rod of the hydraulic cylinder (54).