A small lettuce harvester

Abstract

The utility model discloses a small -size lettuce harvester relates to lettuce harvesting field, including the vehicle body, the front end of vehicle body is equipped with the rack of rectangular box body structure, install three baffle plates of vertical arrangement in the inner chamber of rack, and two guide forks are symmetrically arranged to the both ends of the baffle plate of the lowermost layer, the cutting assembly for cutting lettuce is installed to the inner chamber bottom of rack, and the cutting assembly is located the just below of one of the guide fork.

Description

Technical Field

[0001] This utility model relates to the field of lettuce harvesting, specifically a small lettuce harvester. Background Technology

[0002] Lettuce, also known as celtuce, is a variety of lettuce in the genus *Lactuca* of the family Asteraceae that forms fleshy, tender stems. It is an annual or biennial herbaceous plant. Other names include stem lettuce, lettuce shoots, and celtuce. Lettuce harvesting is still primarily done manually. After manual harvesting, considerable time is required to remove the older leaves from the main stem, which is not only labor-intensive but also physically demanding. Currently, there is almost no suitable machinery for harvesting lettuce. Utility Model Content

[0003] The purpose of this utility model is to provide a small lettuce harvester in order to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a small lettuce harvester, comprising a vehicle body, a rectangular box-shaped frame installed at the front end of the vehicle body, three vertically arranged partitions installed in the inner cavity of the frame, two guide forks symmetrically provided at both ends of the bottom partition, and a cutting component for cutting lettuce installed at the bottom of the inner cavity of the frame, the cutting component being located directly below one of the guide forks; A clamping and conveying assembly is installed on the upper surface of one of the partitions in the middle. The clamping and conveying assembly includes two aligned and parallel slide rails. Two slide blocks are slidably mounted on the two slide rails along their length. The two slide blocks are symmetrically distributed between the two ends of the two slide rails. A second motor is installed on the top of each of the two slide blocks. The output end of the second motor is connected to a clamping wheel. Two linearly arranged lead screws are provided between the two slide rails. The two lead screws are respectively threaded to the two slide blocks. A third motor is installed on each of the two outer side walls of the frame to drive the two lead screws to rotate. Leaf-cutting assemblies are provided directly above and below the two clamping wheels. The two sets of leaf-cutting assemblies are respectively installed on the uppermost partition and the lowermost partition, and are used to move relative to the lettuce when the two clamping wheels clamp and push it, so as to remove the leaves on the main stem of the lettuce.

[0005] As a further improvement of this utility model: a fourth motor is installed inside the vehicle body, and the output end of the fourth motor is fixedly connected to the back of the frame.

[0006] As a further embodiment of this utility model: the cutting assembly includes a harvesting knife, one end of which is equipped with a first motor, which is fixedly installed in the inner cavity of the frame.

[0007] As a further improvement of this utility model, the clamping wheel is a wheel that is convex on the outside and concave on the inside, and has a curved surface structure in the circumferential direction.

[0008] As a further embodiment of this utility model: the leaf-cutting assembly includes two semi-circular arc-shaped leaf-cutting blades, each with a connecting rod integrally formed on its outer end. A rotating rod is rotatably connected to the middle of the connecting rod, one end of which is fixed to the uppermost partition plate. An electric telescopic rod is hinged to the end of the connecting rod away from the leaf-cutting blade, and the end of the electric telescopic rod away from the connecting rod is hinged to the inner wall of the frame via a connector.

[0009] As a further improvement of this utility model: the top of the leaf-cutting blade is the cutting edge, and the two leaf-cutting blades in each leaf-cutting assembly are symmetrically and alternately distributed.

[0010] Compared with the prior art, the beneficial effects of this utility model are: This invention, by setting up a clamping and conveying assembly, can use two clamping wheels to clamp the lettuce. At the same time, two second motors simultaneously drive the two clamping wheels to rotate, thereby forcing the lettuce to move in one direction and move relative to the two sets of leaf-cutting assemblies to cut off the leaves on the outer wall of the lettuce stem. Meanwhile, the lettuce moves out along the moving direction, which is beneficial for subsequent collection operations and is suitable for continuous operation. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the structure of the present invention with the vehicle body removed; Figure 3 This utility model Figure 2 Another perspective structural diagram; Figure 4 This is a schematic diagram of the frame structure of this utility model; Figure 5 This is a schematic diagram of the structure of the clamping and conveying assembly of this utility model; Figure 6 This is a schematic diagram of the structure of the blade-cutting assembly of this utility model.

[0012] In the diagram: 1. Vehicle body; 2. Frame; 21. Partition; 3. Guide fork; 4. Cutting assembly; 401. Harvesting knife; 402. First motor; 5. Clamping and conveying assembly; 501. Slide rail; 502. Slide block; 503. Second motor; 504. Clamping wheel; 505. Lead screw; 506. Third motor; 6. Leaf cutting assembly; 601. Leaf cutting blade; 602. Connecting rod; 603. Rotating rod; 604. Electric telescopic rod; 7. Fourth motor. Detailed Implementation

[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0014] Please see Figures 1-6 In this embodiment of the utility model, a small lettuce harvester includes a vehicle body 1. A rectangular box-shaped frame 2 is installed at the front end of the vehicle body 1. Three vertically arranged partitions 21 are installed in the inner cavity of the frame 2. Two guide forks 3 are symmetrically arranged at both ends of the bottom partition 21. A cutting component 4 for cutting lettuce is installed at the bottom of the inner cavity of the frame 2. The cutting component 4 is located directly below one of the guide forks 3. A clamping and conveying assembly 5 is installed on the upper surface of a partition 21 in the middle. The clamping and conveying assembly 5 includes two aligned and parallel slide rails 501. Two slide blocks 502 are slidably mounted on the two slide rails 501 along their length. The two slide blocks 502 are symmetrically distributed between the two ends of the two slide rails 501. A second motor 503 is installed on the top of each of the two slide blocks 502. The output end of the second motor 503 is connected to a clamping wheel 504. Two linearly arranged lead screws 505 are provided between the two slide rails 501. The two lead screws 505 are respectively connected to the two slide blocks 502 by threads. A third motor 506 is installed on each of the two outer side walls of the frame 2 to drive the two lead screws 505 to rotate. Leaf-cutting assemblies 6 are provided directly above and below the two clamping wheels 504. The two sets of leaf-cutting assemblies 6 are respectively installed on the uppermost partition 21 and the lowermost partition 21. They are used to cooperate with the two clamping wheels 504 to clamp and push the lettuce and move relative to the lettuce to remove the leaves on the main stem of the lettuce.

[0015] The vehicle body 1 is equipped with a fourth motor 7, the output end of which is fixedly connected to the back of the frame 2; the cutting assembly 4 includes a picking knife 401, one end of which is equipped with a first motor 402, which is fixedly installed in the inner cavity of the frame 2.

[0016] In this embodiment: by setting up the clamping and conveying assembly 5, the lettuce can be clamped by two clamping wheels 504. At the same time, two second motors 503 drive the two clamping wheels 504 to rotate, thereby forcing the lettuce to move in one direction and move relative to the two sets of leaf-cutting assemblies 6 to cut off the leaves on the outer wall of the lettuce stem. At the same time, the lettuce moves out along the moving direction, which is beneficial for subsequent collection operations and is suitable for continuous operation.

[0017] The lettuce was planted using a single-row, one-row cultivation method, with an average row spacing of 550 mm and a maximum plant spacing of 160 mm, which was in line with the actual cultivation conditions in most parts of my country at that time. Therefore, the lettuce could be easily harvested using the small lettuce harvester described in this plan after it matured. Before harvesting, the lettuce must be positioned between the two guide forks 3. As the vehicle body 1 moves forward, when the lettuce is between the two clamping wheels 504, the two third motors 506 drive the lead screws 505 to rotate, causing the two slides 502 to move synchronously and come closer together to clamp the lettuce. At the same time, the two second motors 503 drive the two clamping wheels 504 to rotate, pulling the clamped lettuce upward. After the lettuce is pulled out a section, the two second motors 503 stop working. Then, the cutting component 4 cuts the lettuce root. When the lettuce root is cut, the frame 2 is driven by 7 to rotate 90 degrees, making the lettuce lay horizontally. The two second motors 503 are restarted, and the rotation of the two clamping wheels 504 forces the lettuce to move. At this time, the two sets of leaf-cutting components 6 remove the withered old leaves on the outer wall of the lettuce stem, keeping the fresh leaves. At the same time, the lettuce is also moved horizontally, and then the next batch of lettuce is harvested.

[0018] It should be noted that in this scheme, the two second motors 503 rotate in opposite directions, thus enabling them to pull up the lettuce and push it to move in one direction.

[0019] Please refer to this carefully. Figures 1-6 The leaf-cutting assembly 6 includes two semi-circular arc-shaped leaf-cutting blades 601. A connecting rod 602 is integrally formed on the outer end of each of the two leaf-cutting blades 601. A rotating rod 603 is rotatably connected to the middle of the connecting rod 602. One end of the rotating rod 603 is fixed to the uppermost partition plate 21. An electric telescopic rod 604 is hinged to the end of the connecting rod 602 away from the leaf-cutting blades 601. The end of the electric telescopic rod 604 away from the connecting rod 602 is hinged to the inner wall of the frame 2 through a connector.

[0020] In this embodiment: the two sets of leaf-cutting components 6 need to be coordinated with the lettuce during the lateral movement before operation. In one set of leaf-cutting components 6, the two leaf-cutting blades 601 can push one end of the connecting rod 602 through the electric telescopic rod 604 before the lettuce is pulled up, and rotate around the rotating rod 603 as the axis, so that the two symmetrically staggered leaf-cutting blades 601 come closer to each other to form a ring around the main stem of the lettuce. Until the lettuce is placed laterally, the old leaves of the lettuce in the moving state come into contact with the blade part of the upper end of the leaf-cutting blade 601, thereby peeling off the old leaves of the main stem of the lettuce.

[0021] Please refer to this carefully. Figures 1-6The clamping wheel 504 is a wheel with an outward convex and inward concave shape and a curved surface structure in the circumference; the top of the leaf-cutting blade 601 is the cutting edge, and the two leaf-cutting blades 601 in each leaf-cutting assembly 6 are symmetrically and alternately distributed.

[0022] In this embodiment: This solution is suitable for harvesting mature lettuce of the same quality. The main stems of mature lettuce of the same variety are roughly the same thickness. Therefore, the clamping profiles of the clamping wheel 504 and the leaf-cutting blade 601 are selected to match the outer diameter of the mature lettuce. In addition, it should be noted that the two sets of leaf-cutting components 6 in this solution only perform rough processing and peeling of the old leaves on the main stem of the lettuce. Even if there are residual old leaves, they are very few, which can also reduce the workload of subsequent processing of old leaves.

[0023] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A small lettuce harvester, characterized in that, The vehicle includes a body (1), and a rectangular box-shaped frame (2) is installed at the front end of the body (1). Three vertically arranged partitions (21) are installed in the inner cavity of the frame (2). Two guide forks (3) are symmetrically arranged at both ends of the bottom partition (21). A cutting component (4) for cutting lettuce is installed at the bottom of the inner cavity of the frame (2). The cutting component (4) is located directly below one of the guide forks (3). A clamping and conveying assembly (5) is installed on the upper surface of a partition (21) in the middle. The clamping and conveying assembly (5) includes two aligned and parallel slide rails (501). Two slide blocks (502) are slidably mounted on the two slide rails (501) along their length. The two slide blocks (502) are symmetrically distributed between the two ends of the two slide rails (501). A second motor (503) is installed on the top of each of the two slide blocks (502). The output end of the second motor (503) is connected to a clamping wheel (504). Two linearly arranged lead screws (505) are provided between the two slide rails (501). The two lead screws (505) are respectively connected to the two slide blocks (502) by threads. A third motor (506) is installed on both outer side walls of the frame (2) to drive the two lead screws (505) to rotate. Leaf-cutting assemblies (6) are provided directly above and below the two clamping wheels (504). The two sets of leaf-cutting assemblies (6) are respectively installed on the uppermost partition (21) and the lowermost partition (21) to cooperate with the two clamping wheels (504) to clamp and push the lettuce and move relative to the lettuce to remove the leaves on the main stem of the lettuce.

2. The small lettuce harvester according to claim 1, characterized in that, The vehicle body (1) is equipped with a fourth motor (7), and the output end of the fourth motor (7) is fixedly connected to the back of the frame (2).

3. A small lettuce harvester according to claim 2, characterized in that, The cutting assembly (4) includes a picking knife (401), one end of which is equipped with a first motor (402), which is fixedly installed in the inner cavity of the frame (2).

4. A small lettuce harvester according to claim 3, characterized in that, The clamping wheel (504) is a wheel that is convex on the outside and concave on the inside, and has a curved surface structure in the circumferential direction.

5. A small lettuce harvester according to claim 4, characterized in that, The leaf-cutting assembly (6) includes two leaf-cutting blades (601) with a semi-circular arc shape. The outer ends of the two leaf-cutting blades (601) are integrally formed with connecting rods (602). A rotating rod (603) is rotatably connected to the middle of the connecting rod (602). One end of the rotating rod (603) is fixed to the uppermost partition plate (21). An electric telescopic rod (604) is hinged to the end of the connecting rod (602) away from the leaf-cutting blades (601). The end of the electric telescopic rod (604) away from the connecting rod (602) is hinged to the inner wall of the frame (2) through a connector.

6. A small lettuce harvester according to claim 5, characterized in that, The top of the leaf cutter (601) is the blade tip, and the two leaf cutters (601) in each leaf cutting assembly (6) are symmetrically staggered.

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