Feeding, separating, receiving and seedling planting linkage device for substrate block seedling transplanter

Abstract

The present invention relates to a feeding, separating, receiving and seedling-planting linkage device provided on a substrate block seedling transplanter, belonging to the technical field of transplanting machinery for seedlings. The device includes a seedling feeding mechanism, a seedling separating mechanism, a seedling receiving and planting mechanism and a hole punching mechanism installed on the frame of the transplanter; a large and a small driving gears are coaxially arranged on the frame, and large and small driven gears respectively meshing with the large and small driving gears are arranged on the frame; a first and a second four-bar linkages are arranged on the frame; a first connecting rod is connected between the large driven gear and the first four-bar linkage; one end of the first connecting rod is hinged to the side surface of the large driven gear, and the other end is hinged to the first four-bar linkage. Since two four-bar linkages are provided and the two four-bar linkages are respectively connected to the seedling separating mechanism, the seedling receiving and planting mechanism and the hole punching mechanism through two connecting rods to form a linkage with each other; the connection between seedling separation and feeding, the connection between seedling separation and receiving, and the connection between seedling receiving and planting are realized; thus, the continuous operation of seedling feeding, seedling separation, seedling receiving, hole punching and seedling planting is realized.

Description

Technical Field

[0001] The present invention relates to an integrated linkage device for seedling feeding, seedling separating, seedling receiving and seedling planting on a substrate block seedling transplanter, belonging to the technical field of transplanting machinery for seedlings. Background Art

[0002] Substrate block seedlings have the advantages of simple block preparation process, low seedling raising cost, short seedling slowdown period after planting, high survival rate, etc. At the same time, due to their regular shape, they are convenient for mechanical transplanting and grasping, and have good planting stability. Substrate block seedling transplanters can be divided into trench transplanting and hole punching transplanting according to different planting methods. Among them, trench transplanting is suitable for bare land operations; hole punching transplanting is suitable for bare land and film mulching operations.

[0003] As the core working component of the substrate block seedling transplanter, the performance of the seedling separating and planting device directly affects the operation quality and efficiency of the transplanter. At present, the devices for substrate block seedlings mostly focus on seedling feeding, seedling picking or seedling separating mechanisms. For example, the Chinese patent application with publication number CN115443779A discloses an automatic seedling separating and picking system for substrate block surfaces, and the Chinese patent application with publication number CN113303056A discloses an automatic seedling picking and feeding device for vegetable transplanters.

[0004] Combining seedling separating and seedling picking after separating is disclosed in the Chinese patent application with publication number CN109496512A, which discloses a pneumatic clamping type seedling separating and picking device for a rape substrate block surface transplanter. The device includes a seedling separating device and a seedling picking device, and its seedling separating device and seedling picking device are independent of each other and do not form a linkage; moreover, the structure of the seedling separating device is too complex, affecting the use cost and efficiency.

[0005] In addition, the existing seedling separating and picking devices including the above do not consider the simultaneous seedling planting mechanism. For a substrate block seedling transplanter, the seedling feeding, seedling separating, seedling picking, seedling receiving and seedling planting in its use are sequential and coherent actions, which need to be considered simultaneously. Summary of the Invention

[0006] The technical problem to be solved by the present invention is: how to make the seedling feeding, seedling separating, seedling receiving and seedling planting of the substrate block seedling transplanter operate in a sequential and coherent manner.

[0007] The technical solution proposed by the present invention to solve the above technical problem is: a feeding, separating, receiving and planting linkage device for substrate block seedlings provided on a substrate block seedling transplanter, including a seedling feeding mechanism, a seedling separating mechanism, a receiving and planting mechanism and a hole punching mechanism installed on the frame of the transplanter; a large and a small driving gears are coaxially arranged on the frame, and large and small driven gears respectively meshing with the large and small driving gears are also arranged on the frame; a first four-bar linkage mechanism and a second four-bar linkage mechanism are further arranged on the frame; a first connecting rod is connected between the large driven gear and the first four-bar linkage mechanism; one end of the first connecting rod is hinged to the side surface of the large driven gear, and the other end thereof is hinged to the first four-bar linkage mechanism;

[0008] The seedling feeding mechanism includes an inclined bottom frame inclined relative to the horizontal plane, a conveyor belt located on the inclined bottom frame, guide plates located on both sides of the inclined bottom frame, and a motor for driving the conveyor belt. A pair of conveying clamping plates and a first double-shaft driving cylinder are arranged on both sides of the low end of the inclined bottom frame. The extending ends of the two piston rods of the first double-shaft driving cylinder are respectively fixedly connected to the opposite back surfaces of the pair of conveying clamping plates. The opposite front surfaces of the pair of conveying clamping plates are used to clamp or release the substrate block seedlings. A driving cylinder and a connecting frame are arranged on the bottom surface of the inclined bottom frame. The extending end of the piston rod of the driving cylinder is connected with a baffle plate, and the baffle plate is hinged to the connecting frame;

[0009] The seedling separating mechanism includes a pair of seedling separating clamping plates, a second double-shaft driving cylinder, and a seedling clamping swing rod; one end of the seedling clamping swing rod is hinged to the machine frame, and the other end is connected to the second double-shaft driving cylinder; the extending ends of the two piston rods of the second double-shaft driving cylinder are respectively fixedly connected to the opposite back surfaces of the pair of seedling separating clamping plates; a second connecting rod is connected between the seedling clamping swing rod and the first four-bar linkage mechanism; one end of the second connecting rod is hinged to the seedling clamping swing rod, and the other end is hinged to the first four-bar linkage mechanism;

[0010] The seedling receiving and planting mechanism includes a vertical plate fixed to the machine frame and a rotary driving cylinder, and also includes a pair of seedling receiving clamping plates and a third double-shaft driving cylinder; the output rotating shaft of the rotary driving cylinder is connected with a rotary baffle plate; the third double-shaft driving cylinder is fixed on the first four-bar linkage mechanism, and the extending ends of the two piston rods of the third double-shaft driving cylinder are respectively fixedly connected to the opposite back surfaces of the pair of seedling receiving clamping plates. The opposite front surfaces of the pair of seedling receiving clamping plates are used to clamp or release the substrate block seedlings;

[0011] The hole punching mechanism includes a third connecting rod and a square hole puncher; the upper end of the third connecting rod is hinged to the side surface of the small driven gear, the lower end is hinged to the second four-bar linkage mechanism, a punching pressing plate is fixedly installed at the bottom of the second four-bar linkage mechanism, the square hole puncher is located directly below the punching pressing plate, and both ends of the square hole puncher are fixed to the machine frame through springs.

[0012] Furthermore, when the large and small driving gears rotate to drive the large and small driven gears to rotate, the first connecting rod rotates with the rotation of the large driven gear and drives the first four-bar linkage mechanism to form an up-and-down arc swing. The third double-shaft driving cylinder, the seedling receiving clamping plates, and the second connecting rod also form an up-and-down arc swing along with the first four-bar linkage mechanism. The seedling clamping swing rod, the second double-shaft driving cylinder, and the seedling separating clamping plates form a left-and-right arc swing under the action of the up-and-down arc swing of the second connecting rod; the third connecting rod rotates with the rotation of the small driven gear and drives the second four-bar linkage mechanism and the punching pressing plate to form an up-and-down arc swing.

[0013] Further, when a pair of seedling separating clamping plates swing to the left end along the left and right arcs, the pair of seedling separating clamping plates are vertically arranged on the two outer sides of the lower end of the inclined bottom frame, and the opposite fronts of the pair of seedling separating clamping plates are aligned with and clamp a substrate block seedling; meanwhile, the second four-bar linkage swings to the lower end along the up and down arcs, and the punching pressing plate presses the square puncher to overcome the spring force and insert into the planting soil bed to press holes and form planting holes;

[0014] When the pair of seedling separating clamping plates swing to the right end along the left and right arcs, the rotary cylinder opens to drive the rotary plate to rotate clockwise to the vertical direction and be parallel to the vertical plate, the second double-acting cylinder drives the pair of seedling separating clamping plates to release the substrate block seedling, and the rotary plate and the vertical plate clamp the falling substrate block seedling;

[0015] When a pair of seedling receiving clamping plates swing upward to the upper end along the up and down arcs, the rotary cylinder drives the rotary plate to rotate counterclockwise to form an angle with the vertical plate and release the substrate block seedling. At the same time, the third double-acting cylinder drives the pair of seedling receiving clamping plates to clamp the substrate block seedling;

[0016] When the substrate block seedling is clamped by the pair of seedling receiving clamping plates and swings downward to the lower end, the third double-acting cylinder drives the pair of seedling receiving clamping plates to release the substrate block seedling, and the substrate block seedling falls into the planting hole.

[0017] Further, the four-bar linkage is formed by hinging the ends of two upper and lower cross bars and a vertical bar to each other, and one ends of the two upper and lower cross bars are respectively hinged to the frame.

[0018] The beneficial effects of the present invention are: Due to the setting of two synchronously swinging four-bar linkages (the first four-bar linkage and the second four-bar linkage), through two connecting rods (the first and second connecting rods), the two four-bar linkages are respectively connected to the seedling separating mechanism, the seedling receiving and planting mechanism, and the punching mechanism to form a linkage; this linkage realizes: 1) Through the up and down arc swing of the first four-bar linkage, the seedling separating mechanism forms a left and right arc swing, so as to connect with the seedling feeding mechanism to form seedling separation; 2) Through the transition of the rotary baffle and the vertical plate of the seedling receiving and planting mechanism and the seedling receiving plate that swings up and down along with the first four-bar linkage, the seedling separation is connected with the seedling receiving; 3) Through the up and down arc swing of the second four-bar linkage that is synchronous with the first four-bar linkage, the punching is synchronized with the seedling separation and the seedling receiving is docked with the completed punching, so as to form the connection between the seedling receiving and the planting; Thus, the continuous operation of seedling feeding, seedling separation, seedling receiving, punching, and planting is realized, and both the operation efficiency and the operation quality are greatly improved. Description of the Drawings

[0019] The following further describes a seedling feeding, separating, receiving, and planting linkage device provided on a substrate block seedling transplanter of the present invention with reference to the drawings.

[0020] Figure 1It is a schematic structural diagram of a feeding, separating, receiving, and seedling-planting linkage device installed on a substrate-block seedling transplanter;

[0021] Figure 2 It is Figure 1 the top view of;

[0022] Figure 3 It is Figure 1 the schematic structural diagram in another state of;

[0023] Figure 4 It is Figure 1 the partial schematic diagram of the opening mechanism disassembled in;

[0024] Figure 5 It is Figure 1 the partial schematic diagram of the bottom end of the inclined bottom frame disassembled in;

[0025] Figure 6 It is the state change diagram from seedling separation to seedling receiving;

[0026] Figure 7 It is Figure 5 another state schematic diagram of. Specific implementation mode Embodiment

[0027] A feeding, separating, receiving, and seedling-planting linkage device installed on a substrate-block seedling transplanter in this embodiment, that is, a four-action integrated linkage device for feeding seedlings, separating seedlings, receiving seedlings, and planting seedlings installed on the substrate-block seedling transplanter, as shown in Figure 1 , Figure 2 and Figure 3 shown, includes a seedling feeding mechanism, a seedling separating mechanism, a seedling receiving and planting mechanism, and a punching mechanism installed on the frame of the substrate-block seedling transplanter; in this embodiment, the frame of the transplanter is all represented by a section line in the figure. A coaxial large driving gear 10 and a small driving gear 29 are provided on the frame, a large driven gear 8 meshing with the large driving gear 10, and a small driven gear 12 meshing with the small driving gear 29. A first four-bar linkage mechanism 11 and a second four-bar linkage mechanism 16 are also provided on the frame; the first four-bar linkage mechanism 11 is formed by hinging the ends of two upper and lower crossbars and a vertical bar to each other, and one end of each of the two upper and lower crossbars is hinged to the frame; the structure of the second four-bar linkage mechanism 16 is the same as that of the first four-bar linkage mechanism 11 and will not be described in detail. A first connecting rod 9 is connected between the large driven gear 8 and the first four-bar linkage mechanism 11; one end of the first connecting rod 9 is hinged to the side surface of the large driven gear 8, and the other end thereof is hinged to the upper crossbar of the first four-bar linkage mechanism 11.

[0028] As shown in Figure 1 , Figure 2 and Figure 3As shown in the figure, the seedling feeding mechanism includes an inclined bottom frame 1 inclined relative to the horizontal plane, a conveyor belt 26 located on the inclined bottom frame 1, guide plates 2 located on both sides of the inclined bottom frame 1, and a motor 27 for driving the conveyor belt 26. A pair of conveying clamping plates 25 and a first double-shaft driving cylinder 4 are provided on both sides of the low end of the inclined bottom frame 1. A photoelectric induction switch 28 is also provided on the low end side of the inclined bottom frame 1. The first double-shaft driving cylinder 4 in this embodiment uses a double-shaft cylinder. The substrate block seedlings 3 are sent from the high end to the low end of the inclined bottom frame 1 on the conveyor belt 26. The extended ends of the two piston rods of the first double-shaft cylinder 4 are respectively fixed to the opposite backs of a pair of conveying clamping plates 25. The opposite fronts of the pair of conveying clamping plates 25 are used to clamp or release the substrate block seedlings 3. A driving cylinder 24 and a connecting frame 22 are provided on the bottom surface of the inclined bottom frame 1. The driving cylinder 24 in this embodiment also uses a cylinder. The extended end of the piston rod of the cylinder 24 is connected to a baffle 23, and the baffle 23 is hinged to the connecting frame 22.

[0029] As Figure 1 , Figure 2 and Figure 3 shown in the figure, the seedling separating mechanism includes a pair of seedling separating clamping plates 5, a second double-shaft driving cylinder 6, and a seedling clamping swing rod 7. The second double-shaft driving cylinder 6 in this embodiment also uses a double-shaft cylinder. One end of the seedling clamping swing rod 7 is hinged to the frame, and the other end is connected to the second double-shaft cylinder 6. The extended ends of the two piston rods of the second double-shaft cylinder are respectively fixed to the opposite backs of a pair of seedling separating clamping plates 5. A second connecting rod 14 is connected between the seedling clamping swing rod 7 and the first four-bar linkage 11. One end of the second connecting rod 14 is hinged to the seedling clamping swing rod 7, and the other end is hinged to the middle of the upper cross bar of the first four-bar linkage 11.

[0030] As Figure 1 , Figure 2 and Figure 3 shown in the figure, the seedling receiving and planting mechanism includes a vertical plate 17 fixed to the frame and a rotary driving cylinder 21, and also includes a pair of seedling receiving clamping plates 19 and a third double-shaft driving cylinder 18. The rotary driving cylinder 21 in this embodiment uses a rotary cylinder, and the third double-shaft driving cylinder 18 uses a double-shaft cylinder. The output rotating shaft of the rotary cylinder 21 is connected to a rotary baffle 20. The third double-shaft cylinder 18 is fixed to the vertical rod of the first four-bar linkage 11. The extended ends of the two piston rods of the third double-shaft cylinder 18 are respectively fixed to the opposite backs of a pair of seedling receiving clamping plates 19. The opposite fronts of the pair of seedling receiving clamping plates 19 are used to press or release the substrate block seedlings 3.

[0031] As Figure 1 , Figure 2 and Figure 3 shown in the figure, the hole punching mechanism includes a third connecting rod 13 and a square hole punch 30. The upper end of the third connecting rod 13 is hinged to the side surface of the small driven gear 12, and its lower end is hinged to the upper cross bar of the second four-bar linkage 16. The bottom of the vertical rod of the second four-bar linkage 16 is fixedly installed with a hole punching pressing plate 15. As Figure 4As shown, the square punch 30 is located directly below the punching pressing plate 15, and both ends of the square punch 30 are fixed to the frame by springs.

[0032] When the large driving gear 10 rotates to drive the large driven gear 8 to rotate, the first connecting rod 9 rotates along with the rotation of the large driven gear 8 and drives the first four-bar linkage 11 to form an up-and-down arc swing along a section of arc. At the same time, the third double-acting cylinder 18 and the seedling clamping plate 19 also form an up-and-down arc swing along with the first four-bar linkage 11. At the same time, the second connecting rod 14 also forms an up-and-down arc swing along with the first four-bar linkage 11. In this way, the seedling clamping swing rod 7, the second double-acting cylinder 6, and the seedling separating plate 5 form a left-and-right arc swing under the action of the up-and-down arc swing of the second connecting rod 14. At the same time, the small driving gear 29 coaxial with the large driving gear 10 rotates to drive the small driven gear 12 to rotate, and the third connecting rod 13 rotates along with the rotation of the small driven gear 12 and drives the second four-bar linkage 16 and the punching pressing plate 15 to also form an up-and-down arc swing along a section of arc.

[0033] The situation of the linkage device in this embodiment during operation is as follows.

[0034] ① Manually or mechanically place the whole row of substrate block seedlings 3 neatly on the conveyor belt 26. As Figure 1 shown, under the action of the stepping motor 27, the substrate block seedlings 3 are orderly conveyed forward on the conveyor belt 26 until they move to the first double-acting cylinder 4 at the low end of the inclined bottom frame 1.

[0035] ② The first double-acting cylinder 4 is initially in a clamping state, so that a pair of conveying clamping plates 25 clamp a certain number (usually 3 to 4) of substrate block seedlings 3. When the photoelectric induction switch 28 senses that a pair of seedling separating plates 5 swing to the left along the left-and-right arc, the first double-acting cylinder 4 releases to make a pair of conveying clamping plates 25 in an open state, releasing the first substrate block seedling 3 to the lowermost end of the conveyor belt 26 (the low end of the inclined bottom frame 1). At this time, the cylinder 24 releases to make the baffle 23 rotate to the left (counterclockwise), just blocking the first substrate block seedling to prevent it from continuing to slide down. When a pair of seedling separating plates 5 swing to the left end of the arc, a pair of seedling separating plates 5 are vertically arranged on the two outer sides of the low end of the inclined bottom frame 1 and the opposite fronts of a pair of seedling separating plates 5 are aligned with the first substrate block seedling 3. The second double-acting cylinder 6 closes to drive a pair of seedling separating plates 5 to clamp the first substrate block seedling 3, as Figure 6 shown in (a). At the same time when a pair of seedling separating plates 5 swing to the left end of the arc, the second four-bar linkage 16 swings to the lower end along the up-and-down arc, and the punching pressing plate presses the square punch 30 to insert into the surface of the planting soil bed against the spring force to form a planting hole, or break the film on the upper surface of the film-covered seedling bed to form a planting hole by pressing a hole in the seedling bed.

[0036] ③Then, the air cylinder 24 contracts, causing the baffle 23 to rotate to the right (clockwise). A pair of seedling separating clamping plates 5 clamp the first substrate block seedling 3 and swing from the left end to the right, leaving the inclined bottom rack 1 and the conveyor belt 26. At this time, the photoelectric induction switch 28 cannot sense the seedling separating clamping plates 5, so the air cylinder 24 releases, causing the baffle 23 to rotate to the left (counterclockwise). The first double-acting cylinder 4 releases a pair of conveying clamping plates 25 again to let the second substrate block seedling pass through to the lowermost end of the conveyor belt 26, waiting to be clamped by the seedling separating clamping plates 5 next time.

[0037] ④When a pair of seedling separating clamping plates 5 swing to the right end of the arc (i.e., in a state perpendicular to the ground) along the left and right arcs, as Figure 6 shown in (b), the rotary air cylinder 21 opens and drives the rotary plate 20 to rotate clockwise until it rotates to the vertical direction and is parallel to the vertical plate 17. At the same time, the second double-acting cylinder 6 drives a pair of seedling separating clamping plates 5 to release the first substrate block seedling 3. The first substrate block seedling 3 falls vertically, and the rotary plate 20 and the fixed vertical plate 17 cooperate to clamp the falling first substrate block seedling 3, as Figure 6 shown in (c).

[0038] ⑤When a pair of seedling receiving clamping plates 19 swing upward along the upper and lower arcs to the upper end of the arc, at this time, the rotary air cylinder 21 drives the rotary plate 20 to rotate counterclockwise to form an angle with the vertical plate 17 and releases the first substrate block seedling 3. At the same time, the third double-acting cylinder 18 drives a pair of seedling receiving clamping plates 19 to clamp the first substrate block seedling 3, completing the replacement and connection action of the first substrate block seedling 3, as Figure 6 shown in (d).

[0039] ⑥When a pair of seedling receiving clamping plates 19 swing downward along the upper and lower arcs, when the first substrate block seedling 3 is clamped by the seedling receiving clamping plates 19 and swings downward to the lower end of the arc, the third double-acting cylinder 18 drives a pair of seedling receiving clamping plates 19 to release the first substrate block seedling 3, as Figure 6 shown in (e), and the first substrate block seedling 3 falls into the already opened seedling planting hole.

[0040] Then, a pair of seedling separating clamping plates 5 swing to the left along the left and right arcs again, repeating the above steps ② - ⑤, and so on, until all the transplanting operations of the whole row of substrate block seedlings are completed.

[0041] The above is only the preferred embodiment of the present invention, but the present invention is not limited thereto. For example, the first double-acting cylinder 4, the second double-acting cylinder 6, the third double-acting cylinder 18, the rotary air cylinder 21, and the air cylinder 24 can all be replaced with driving cylinders such as oil cylinders or electric cylinders. All equivalent replacements or equivalent changes made according to the concept and technical solution of the present invention should be covered within the protection scope of the present invention.

Claims

1. A feeding, separating, receiving and seedling planting linkage device for a substrate block seedling transplanter, characterized in that : It includes a seedling feeding mechanism, a seedling separating mechanism, a seedling receiving and planting mechanism, and a hole punching mechanism installed on the frame of the transplanting machine; on the frame, there are coaxial large and small driving gears and large and small driven gears respectively meshing with the large and small driving gears, and a first four-bar linkage mechanism and a second four-bar linkage mechanism are also arranged on the frame; a first connecting rod is connected between the large driven gear and the first four-bar linkage mechanism; one end of the first connecting rod is hinged at the eccentric position on the side of the large driven gear, and the other end is hinged on the upper crossbar of the first four-bar linkage mechanism; The seedling feeding mechanism includes an inclined bottom frame inclined relative to the horizontal plane, a conveyor belt located on the inclined bottom frame, guide plates located on both sides of the inclined bottom frame, and a motor for driving the conveyor belt. A pair of conveying clamping plates and a first double-acting cylinder are arranged on both sides at the low end of the inclined bottom frame. The extending ends of the two piston rods of the first double-acting cylinder are respectively fixedly connected to the opposite backs of the pair of conveying clamping plates. The opposite fronts of the pair of conveying clamping plates are used to clamp or release the substrate block seedlings. A driving cylinder and a connecting frame are arranged on the bottom surface at the low end of the inclined bottom frame. The extending end of the piston rod of the driving cylinder is connected to a baffle plate, and the baffle plate is hinged to the connecting frame; when the driving cylinder drives the baffle plate to rotate, it can block the substrate block seedlings at the low end of the inclined bottom frame; The seedling separating mechanism includes a pair of seedling separating clamping plates, a second double-acting cylinder, and a seedling clamping swing rod; one end of the seedling clamping swing rod is hinged on the frame, and the other end is connected to the second double-acting cylinder; the extending ends of the two piston rods of the second double-acting cylinder are respectively fixedly connected to the opposite backs of the pair of seedling separating clamping plates; a second connecting rod is connected between the seedling clamping swing rod and the first four-bar linkage mechanism; one end of the second connecting rod is hinged on the seedling clamping swing rod, and the other end is hinged at the middle of the upper crossbar of the first four-bar linkage mechanism. The seedling separating clamping plates are used to clamp the substrate block seedlings at the low end of the inclined bottom frame; The seedling receiving and planting mechanism includes a vertical plate fixed on the frame and a rotary driving cylinder, and also includes a pair of seedling receiving clamping plates and a third double-acting cylinder; the output rotating shaft of the rotary driving cylinder is connected to a rotary baffle plate, and the rotary baffle plate and the vertical plate cooperate to clamp or release the substrate block seedlings transferred by the seedling separating clamping plates; the third double-acting cylinder is fixed on the vertical rod of the first four-bar linkage mechanism, and the extending ends of the two piston rods of the third double-acting cylinder are respectively fixedly connected to the opposite backs of the pair of seedling receiving clamping plates. The opposite fronts of the pair of seedling receiving clamping plates are used to clamp or release the substrate block seedlings; The hole punching mechanism includes a third connecting rod and a square hole puncher; the upper end of the third connecting rod is hinged at the eccentric position on the side of the small driven gear, and the lower end is hinged to the upper crossbar of the second four-bar linkage mechanism. A punching pressing plate is fixedly installed at the bottom of the vertical rod of the second four-bar linkage mechanism. The square hole puncher is located directly below the punching pressing plate, and both ends of the square hole puncher are fixed to the frame by springs; the seedling receiving clamping plates are used to clamp the substrate block seedlings between the rotary baffle plate and the vertical plate and make them fall into the planting holes formed by the square hole puncher.

2. The linkage device according to claim 1, wherein: When the large and small driving gears rotate to drive the large and small driven gears to rotate, the first connecting rod rotates with the rotation of the large driven gear and drives the first four-bar linkage to form an up-and-down arc swing. The third double-shaft driving cylinder, the seedling clamping plate and the second connecting rod also form an up-and-down arc swing along with the first four-bar linkage. The seedling clamping swing rod, the second double-shaft driving cylinder and the seedling separating plate form a left-and-right arc swing under the action of the up-and-down arc swing of the second connecting rod. The third connecting rod rotates with the rotation of the small driven gear and drives the second four-bar linkage and the punching pressing plate to form an up-and-down arc swing.

3. The linkage device according to claim 2, characterized in that: When a pair of seedling separating plates swing to the left end along the left-and-right arc, the pair of seedling separating plates are vertically arranged on the two outer sides of the lower end of the inclined bottom frame, and the opposite fronts of the pair of seedling separating plates are aligned with and clamp a matrix block seedling. At the same time, the second four-bar linkage swings to the lower end along the up-and-down arc, and the punching pressing plate presses the square punching tool to insert into the planting soil bed against the spring force to form a planting hole for seedling planting. When a pair of seedling separating plates swing to the right end along the left-and-right arc, the rotary driving cylinder is opened to drive the rotary baffle to rotate clockwise to the vertical direction and be parallel to the vertical plate. The second double-shaft driving cylinder drives the pair of seedling separating plates to release the matrix block seedling, and the rotary baffle and the vertical plate clamp the falling matrix block seedling. When a pair of seedling receiving plates swing upward to the upper end along the up-and-down arc, the rotary driving cylinder drives the rotary baffle to rotate counterclockwise to form an angle with the vertical plate to release the matrix block seedling. At the same time, the third double-shaft driving cylinder drives the pair of seedling receiving plates to clamp the matrix block seedling. When the matrix block seedling is clamped by a pair of seedling receiving plates and swings downward to the lower end, the third double-shaft driving cylinder drives the pair of seedling receiving plates to release the matrix block seedling, and the matrix block seedling falls into the planting hole.

4. The linkage device according to claim 1, 2 or 3, characterized in that: The four-bar linkage is formed by hinging the ends of two upper and lower cross bars and a vertical bar to each other, and one ends of the two upper and lower cross bars are respectively hinged to the frame.

Images