A lettuce leaf-removing and picking integrated machine

Abstract

The application relates to a lettuce leaf-removing and picking integrated machine, which comprises a stem-leaf removing mechanism, a root shearing mechanism and a telescopic clamping mechanism. The stem-leaf removing mechanism comprises a ring-shaped stem-leaf cutter. The root shearing mechanism comprises a shearing seat plate, which is provided with movable shearing cutters and fixed shearing cutters in V-shaped distribution on a horizontal plane. The movable shearing cutters can rotate towards or away from the fixed shearing cutters. The telescopic clamping mechanism comprises a fixed seat provided with handgrips at left and right ends. The middle part of the fixed seat is provided with a lettuce perforation corresponding to the position of the stem-leaf cutter and facilitating the penetration of the lettuce. The lower end of the fixed seat is provided with a pair of left and right symmetrically distributed clamping plate assemblies. The clamping plate assemblies are respectively driven by moving rods to stretch and contract along the radial direction of the lettuce perforation. The driving end of the moving rod extends upwards to the inside of the handgrip on the same side. The application has reasonable design and can remove leaves and pick different thicknesses of lettuce. The operation is convenient, and the efficiency of picking lettuce can be improved.

Description

Technical Field

[0001] This invention relates to a lettuce leaf removal and harvesting integrated machine. Background Technology

[0002] Lettuce, also known as celery, is a variety that forms fleshy, tender stems. It is an annual or biennial herbaceous plant with a whitish-green skin and crisp, tender flesh. Young stems are bright green, turning whitish-green as they mature. Lettuce is primarily consumed for its fleshy, tender stems, which can be eaten raw, in salads, stir-fried, dried, or pickled. Lettuce is highly adaptable and can be cultivated in spring, autumn, or overwintering, with spring being the primary season and summer harvest. The stems and leaves of lettuce grow densely, clasping the stem upwards from the base. The growth cycle of lettuce is 60-80 days, and it can be harvested when it reaches a height of 15-20 cm. Generally, the optimal harvest time is when the top of the plant is level with the tip of the tallest leaf. Harvesting too early will affect yield; harvesting too late can lead to hollow stems and compromise quality.

[0003] Harvesting lettuce typically involves manually pulling it from the ground, cutting off the roots, and removing the leaves. This method is clearly cumbersome, inefficient, labor-intensive, physically demanding, and increases the risk of worker injury. Currently, there is no convenient lettuce leaf-removing and harvesting machine on the market; therefore, this project was developed. Summary of the Invention

[0004] The present invention addresses the problems existing in the prior art by providing a lettuce leaf removal and harvesting integrated machine with a reasonable design that improves the convenience of lettuce leaf removal and harvesting.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a lettuce leaf removal and harvesting integrated machine, comprising a stem and leaf removal mechanism, a root cutting mechanism, and a telescopic clamping mechanism arranged sequentially from bottom to top. The stem and leaf removal mechanism includes a ring-shaped stem and leaf cutter, the cutting edge of which is located at the bottom. The root cutting mechanism includes a cutting base plate, on which are provided a movable cutting blade and a fixed cutting blade arranged in a V-shape on a horizontal plane. The movable cutting blade can rotate toward or away from the fixed cutting blade. The telescopic clamping mechanism includes a fixed base with handles at both the left and right ends. The middle of the fixed base is provided with a lettuce perforation corresponding to the position of the stem and leaf cutter and facilitating the penetration of the lettuce. The lower end of the fixed base is provided with a pair of clamping plate assemblies symmetrically distributed on the left and right. The pair of clamping plate assemblies are respectively driven by a moving rod to extend and retract radially along the lettuce perforation. The moving rod extends upward to the inside of the handle located on the same side.

[0006] Furthermore, the fixing base includes a pair of left and right symmetrical and spaced fixing blocks. Each fixing block has a clamping seat plate at its bottom for installing the clamping plate assembly. The fixing blocks and the clamping seat plate are coaxially provided with a semi-circular recess that runs vertically through them. The semi-circular recesses of the pair of fixing blocks form a lettuce perforation from the left and right directions.

[0007] Furthermore, the top surface of the clamping seat plate is provided with an arc-shaped sliding groove, which is coaxially distributed with the semi-circular recess. The arc-shaped sliding groove and the semi-circular recess are connected by three radial sliding grooves, which are evenly distributed around the axis of the semi-circular recess. The top surface of the clamping seat plate is provided with a transverse sliding groove A that is connected to the arc-shaped sliding groove. The transverse sliding groove A corresponds to the radial sliding groove located in the middle position. The clamping plate assembly includes an arc-shaped sliding plate, a middle clamping plate, and two lateral clamps. The arc-shaped sliding plate is set in an arc-shaped sliding groove and can slide radially along the arc-shaped sliding groove. Both the front and rear ends of the arc-shaped sliding plate are provided with arc-shaped movable sliding grooves. The middle clamping plate is fixedly set in the middle of the bottom surface of the arc-shaped sliding plate. The middle clamping plate is slidably engaged with the radial sliding groove and the transverse sliding groove A located in the middle position. The two side clamping plates are respectively slidably engaged with the remaining two radial sliding grooves. The top surface of the outer end of the side clamping plate is fixed with a vertically set movable sliding rod. The movable sliding rod is slidably engaged with the movable sliding groove.

[0008] Furthermore, the inner end of the lateral clamp is provided with a limiting flange for abutting against the inner wall of the arc-shaped slide groove, and a plurality of compression springs abut against the outer wall of the arc-shaped slide groove and the arc-shaped slide plate, the compression springs extending and contracting radially along the arc-shaped slide groove.

[0009] Furthermore, a handle is fixed to one end of each pair of fixed blocks that are far apart. The handle is vertically arranged and has a horizontal U-shape. A transverse sliding groove B is provided at both the upper and lower ends of the handle. A vertically arranged moving rod is fixed to the top surface of the outer end of the middle clamping plate. The moving rod is slidably connected to the transverse sliding groove B at both the upper and lower ends of the handle located on the same side.

[0010] Furthermore, a cutter seat plate is fixed to the upper end of the stem and leaf cutter, and the shearing seat plate is set on the cutter seat plate; a clamping seat plate located on the right side is set on the top of the shearing seat plate, and a pair of front and rear distributed support columns are provided between the clamping seat plate on the left side and the cutter seat plate. The fixing block, clamping seat plate, support column and cutter seat plate on the left side are locked and fixed by the first bolt; the fixing block, clamping seat plate, shearing seat plate and cutter seat plate on the right side are locked and fixed by the second bolt.

[0011] Furthermore, the shearing base plate is provided with a vertical through hole connecting the lettuce perforation and the inner cavity of the stem and leaf cutter; the fixed shearing blade is fixedly connected to the shearing base plate at one end near the movable shearing blade, and the movable shearing blade is connected to the output shaft of a shearing motor at one end near the fixed shearing blade. The shearing motor is vertically mounted on the shearing base plate and drives the movable shearing blade to rotate.

[0012] Furthermore, the stem and leaf cutter includes a left stem and leaf cutter and a right stem and leaf cutter that are symmetrically distributed on the left and right sides and spaced apart. Both the left and right stem and leaf cutters are arc-shaped, and the arc edges of the left and right stem and leaf cutters face each other.

[0013] Furthermore, the inner ends of the front and rear sides of the fixing block are provided with recesses, and the top surface of the recesses is provided with transverse sliding grooves C; a stem and leaf cutting plate is vertically provided between the front end and the rear end of the pair of fixing blocks, the stem and leaf cutting plate is located in the recess, the cutting edge of the stem and leaf cutting plate is located at the lower end, the upper end of the stem and leaf cutting plate is slidably engaged with the transverse sliding grooves C, and a pair of transverse tension springs distributed vertically are connected to the left and right ends of the stem and leaf cutting plate, and the end of the transverse tension spring away from the stem and leaf cutting plate is connected to the side wall of the recess on the same side.

[0014] Furthermore, a handle base plate is fixed to one end of the handle near the fixed block on the same side, and the handle base plate is locked to the fixed block by locking bolts.

[0015] Compared with the prior art, the present invention has the following advantages: The present invention is reasonably designed and can remove leaves and harvest lettuce of different thicknesses. It is easy to operate and can improve the efficiency of lettuce harvesting. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural schematic diagram of an embodiment of the present invention;

[0017] Figure 2 This is a schematic diagram of the disassembled state of an embodiment of the present invention;

[0018] Figure 3 This is a top view of the structure of an embodiment of the present invention;

[0019] Figure 4 This is a schematic diagram of the front cross-sectional structure of an embodiment of the present invention;

[0020] Figure 5 This is a side cross-sectional view of an embodiment of the present invention;

[0021] Figure 6 This is a partial three-dimensional structural schematic diagram of an embodiment of the present invention;

[0022] Figure 7 This is a top view of the clamping plate assembly in an embodiment of the present invention;

[0023] Figure 8 This is a three-dimensional structural diagram of the root shearing mechanism in an embodiment of the present invention;

[0024] Figure 9 This is a three-dimensional structural schematic diagram of the stem and leaf removal mechanism in an embodiment of the present invention;

[0025] Figure 10 This is a three-dimensional structural diagram of the fixing block in an embodiment of the present invention;

[0026] Figure 11 This is a three-dimensional structural diagram of the clamping seat plate in an embodiment of the present invention;

[0027] Figure 12 This is a schematic diagram of the cooperation structure between the intermediate clamping plate and the arc-shaped sliding plate in an embodiment of the present invention;

[0028] Figure 13 This is a three-dimensional structural diagram of the lateral clamp in an embodiment of the present invention.

[0029] In the picture:

[0030] 1-Stem and leaf removal mechanism; 2-Root cutting mechanism; 3-Telescopic clamping mechanism; 4-Stem and leaf cutter; 5-Shearing base plate; 6-Moving shearing blade; 7-Fixed shearing blade; 8-Handle; 9-Lettuce piercing; 10-Moving rod; 11-Fixing block; 12-Clamping base plate; 13-Semi-circular recess; 14-Arc-shaped slide; 15-Radial slide; 16-Transverse slide A; 17-Arc-shaped sliding plate; 18-Intermediate clamping plate; 19-Side clamping plate; 20-Moving slide. 21-Moving slide bar; 22-Limiting flange; 23-Compression spring; 24-Groove; 25-Transverse slide rail B; 26-Cutter base plate; 27-Support column; 28-First bolt; 29-Second bolt; 30-Vertical through hole; 31-Shearing motor; 32-Left stem and leaf cutter; 33-Right stem and leaf cutter; 34-Recess; 35-Transverse slide rail C; 36-Stem and leaf cutting plate; 37-Transverse tension spring; 38-Spring retainer; 39-Handle base plate; 40-Locking bolt. Detailed Implementation

[0031] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0032] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0033] like Figures 1-13 As shown, the present invention discloses a lettuce leaf removal and harvesting integrated machine, comprising a stem and leaf removal mechanism 1, a root cutting mechanism 2, and a telescopic clamping mechanism 3 arranged sequentially from bottom to top. The stem and leaf removal mechanism removes the stems and leaves of the lettuce; the root cutting mechanism cuts off the roots of the lettuce; and the telescopic clamping mechanism clamps the lettuce to assist in its extraction. This design is not only suitable for lettuce of different thicknesses, but also improves the efficiency of lettuce harvesting.

[0034] Specifically: the stem and leaf removal mechanism 1 includes a ring-shaped stem and leaf cutter 4, the cutting edge of which is located at the bottom. When the entire device moves from top to bottom, the stem and leaf cutter is used to cut the stems and leaves of the lettuce; the root cutting mechanism 2 includes a cutting seat plate 5, on which a movable cutting blade 6 and a fixed cutting blade 7 are arranged in a V-shape on the horizontal plane. The movable cutting blade 6 can rotate toward or away from the fixed cutting blade 7; the telescopic clamping mechanism 3 includes a fixed seat with a handle 8 at both the left and right ends. The middle of the fixed seat has a lettuce perforation 9 corresponding to the position of the stem and leaf cutter 4 and facilitating the penetration of the lettuce. The lower end of the fixed seat has a pair of clamping plate assemblies symmetrically distributed on the left and right. The pair of clamping plate assemblies are driven by a moving rod 10 to extend and retract radially along the lettuce perforation. The moving rod 10 extends upward to the inside of the handle 8 on the same side. During operation, hold the handles with both hands and place the entire device over the lettuce to be harvested from top to bottom. During the placement process, the ring-shaped stem and leaf cutter and the stem and leaf cutting plate cut the stem and leaves of the lettuce. After the stem and leaves are cut and the stem and leaf cutter is inserted into the soil, the movable shearing blade can rotate toward the fixed shearing blade to cut off the root of the lettuce. Finally, the moving rod drives a pair of clamping plate assemblies to move radially inward along the lettuce perforation, clamping the lettuce and then pulling it out.

[0035] In this embodiment, the fixing base is a split structure, which includes a pair of left and right symmetrical and spaced fixing blocks 11. Each fixing block 11 has a clamping seat plate 12 for installing the clamping plate assembly at its bottom. The fixing blocks 11 and the clamping seat plate 12 are coaxially provided with a semi-circular recess 13 that runs vertically through them. The semi-circular recesses 13 of the pair of fixing blocks 11 form a lettuce perforation 9 from the left and right directions.

[0036] In this embodiment, as Figure 6 , 7 As shown in Figures 11-13, the top surface of the clamping seat plate 12 is provided with an arc-shaped sliding groove 14. The arc-shaped sliding groove 14 is coaxially distributed with the semi-circular recess 13. The arc-shaped sliding groove 14 and the semi-circular recess 13 are connected by three radial sliding grooves 15, which are evenly distributed around the axis of the semi-circular recess 13. The top surface of the clamping seat plate 12 is provided with a transverse sliding groove A16 connected to the arc-shaped sliding groove 14. The transverse sliding groove A16 corresponds to the radial sliding groove 15 located in the middle. The clamping plate assembly includes an arc-shaped sliding plate 17, a middle clamping plate 18, and two side clamping plates 19. The arc-shaped sliding plate 17 is disposed in the arc-shaped sliding groove 14 and can move along the arc-shaped sliding groove 18. 4. For radial sliding, both the front and rear ends of the arc-shaped slide plate 17 are provided with arc-shaped moving slide grooves 20, which extend along the arc direction of the arc-shaped slide plate; the intermediate clamping plate 18 is fixedly set in the middle of the bottom surface of the arc-shaped slide plate 17, and the intermediate clamping plate 18 is slidably engaged with the radial slide groove 15 and the transverse slide groove A16 located in the middle position. The inner end of the intermediate clamping plate is used to extend into the semi-circular recess and contact the lettuce; the two lateral clamping plates 19 are respectively slidably engaged with the remaining two radial slide grooves 15, and the inner end of the lateral clamping plates is used to extend into the semi-circular recess and contact the lettuce. The top surface of the outer end of the lateral clamping plate 19 is fixed with a vertically arranged moving slide rod 21, which is slidably engaged with the moving slide groove 20. During operation, the arc-shaped sliding plate 17 slides inward or outward along the radial direction of the arc-shaped sliding groove 14. At this time, the moving slide rod 21 slides in engagement with the moving sliding groove 20. The arc-shaped sliding plate 17 drives the side clamping plates 19 to move through the moving slide rod 21, thereby realizing the synchronous movement of the middle clamping plate 18 and the two side clamping plates 19. The middle clamping plate 18 and the two side clamping plates 19 cooperate to contact the lettuce and clamp it. It should be noted that when the arc-shaped sliding plate moves inward, the middle clamping plate and the side clamping plates are used to clamp the lettuce; when the arc-shaped sliding plate moves outward, the middle clamping plate and the side clamping plates can release the lettuce.

[0037] In this embodiment, limiting flanges 22 are provided on both sides of the inner end of the lateral clamping plate 19. When the lateral clamping plate moves inward, the limiting flanges 22 abut against the inner wall of the arc-shaped slide groove 14 to achieve limiting. Several compression springs 23 abut against the outer wall of the arc-shaped slide groove 14 and the arc-shaped slide plate 17. The compression springs are always in a compressed state under normal conditions. The compression springs 23 extend and contract radially along the arc-shaped slide groove 14. The compression springs 23 apply a radially inward elastic force to the arc-shaped slide plate 17, so that the intermediate clamping plate 18 and the lateral clamping plate 19 maintain an inward clamping force. Furthermore, in order to better install the compression springs, grooves 24 are provided on the outer wall of the arc-shaped slide groove 14 at positions corresponding to the compression springs 23, and the outer ends of the compression springs abut against the grooves.

[0038] In this embodiment, a handle 8 is fixed to one end of each pair of fixed blocks 11 that is far apart from each other. The handle 8 is vertically arranged and has a horizontal U-shape. Both the upper and lower ends of the handle 8 are provided with transverse sliding grooves B25, with the lower end of the handle 8 having a vertically continuous transverse sliding groove B. A vertically arranged movable rod 10 is fixed to the top surface of the outer end of the intermediate clamping plate 18. The movable rod 10 is slidably connected to the transverse sliding grooves B25 at the upper and lower ends of the handle 8 on the same side. In use, when a person holds the handle 8, pulling the movable rod 10 will cause the arc-shaped sliding plate 17 to slide via the intermediate clamping plate 18, effectively improving the ease of operation. When the movable rod is pulled outward, the internal diameter of the lettuce perforation increases, allowing it to be used to fit larger diameter lettuce.

[0039] The telescopic clamping mechanism works as follows: Holding the handle 8 with both hands, pull the moving rod 10 outwards from the handle 8. The moving rod 10, through the intermediate clamping plate 18, drives the arc-shaped sliding plate 17 to slide outwards. The arc-shaped sliding plate 17 also drives the two side clamping plates 19 to move outwards, compressing the spring 23 to ensure the lettuce is completely inserted through the lettuce piercing hole, thus securing the lettuce. When the moving rod 10 is released, the spring 23 is released, and its elasticity pushes the arc-shaped sliding plate 17 inwards. The arc-shaped sliding plate 17 then drives the intermediate clamping plate 18 and the side clamping plates 19 to move inwards simultaneously, clamping the lettuce and achieving the clamping function.

[0040] In this embodiment, a cutter seat plate 26 is fixed to the upper end of the stem and leaf cutter 4, and a shearing seat plate 5 is disposed on the cutter seat plate 26. A clamping seat plate 12 located on the right side is disposed on the top of the shearing seat plate 5. A pair of front and rear supporting columns 27 are provided between the clamping seat plate 12 on the left side and the cutter seat plate 26. The fixing block 11, clamping seat plate 12, supporting columns 27 and cutter seat plate 26 on the left side are locked and fixed by the first bolt 28. The fixing block 11, clamping seat plate 12, shearing seat plate 5 and cutter seat plate 26 on the right side are locked and fixed by the second bolt 29, thereby realizing the connection of the telescopic clamping mechanism, the root shearing mechanism and the stem and leaf removal mechanism into a whole.

[0041] In this embodiment, the shearing plate 5 is provided with a vertical through hole 30 connecting the lettuce perforation and the inner cavity of the stem and leaf cutter 4; the fixed shearing blade 7 is fixedly connected to the shearing plate 5 at one end near the movable shearing blade 6, and the movable shearing blade 6 is connected to the output shaft of a shearing motor 31 at one end near the fixed shearing blade 7. The shearing motor 31 is vertically mounted on the shearing plate 5 through an interference fit, and the shearing motor 31 drives the movable shearing blade 6 to rotate. Preferably, the shearing motor is a stepper motor. Working principle of the root shearing mechanism: After completing the stem and leaf cutting work, the root shearing mechanism starts to run. The motor shaft of the shearing motor is connected to the movable shearing blade through a coupling. When the stem and leaf cutter enters the soil and the root shearing mechanism approaches the soil surface, the shearing motor drives the movable shearing blade to rotate until the movable shearing blade and the fixed shearing blade are completely closed, at which point the shearing work of the lettuce is completed. After completing the shearing work, the shearing motor reverses, driving the movable shearing blade back to the starting position.

[0042] In this embodiment, the stem and leaf cutter 4 adopts a split structure, comprising a left stem and leaf cutter 32 and a right stem and leaf cutter 33 symmetrically distributed on the left and right sides. Both the left and right stem and leaf cutters 32 and 33 are arc-shaped, and their arc edges face each other. Furthermore, the cutter base plate also adopts a split structure, comprising a left cutter base plate and a right cutter base plate, which are respectively connected to the left and right stem and leaf cutters.

[0043] In this embodiment, recesses 34 are provided on the inner ends of the front and rear sides of the fixing block 11, and a transverse sliding groove C35 is provided on the top surface of the recesses 34. Stem and leaf cutting plates 36 are vertically arranged between the front ends of a pair of fixing blocks 11 and between the rear ends of a pair of fixing blocks 11. The stem and leaf cutting plates 36 are located within the recesses 34, with the cutting edge of the stem and leaf cutting plate 36 located at the lower end. The upper end of the stem and leaf cutting plate 36 slides in conjunction with the transverse sliding groove C35. A pair of transverse tension springs 37, distributed vertically, are connected to the left and right ends of the stem and leaf cutting plate 36. The end of the transverse tension spring 37 away from the stem and leaf cutting plate 36 is connected to the side wall of the recess 34 on the same side. Specifically, the inner end of the transverse tension spring hooks onto the stem and leaf cutting plate, and a spring retainer 38 is fixed to the outer wall of the recess. The outer end of the transverse tension spring 37 hooks onto the spring retainer 38. Both ends of the stem and leaf cutting plate are held in place by transverse tension springs, resulting in a simple structure that facilitates disassembly and replacement of the stem and leaf cutting plate. During operation, because the stem and leaf cutter has a split structure with gaps between the left and right stem and leaf cutters, the stem and leaves in the gap between the left and right stem and leaf cutters are cut by the stem and leaf cutting plate, thereby achieving multi-directional stem and leaf cutting and increasing the cutting range.

[0044] In this embodiment, a handle plate 39 is fixed to one end of the handle 8 near the fixing block 11 located on the same side, and the handle plate 39 is locked to the fixing block 11 by a locking bolt 40.

[0045] Specific implementation process: The lettuce leaf-removing and harvesting integrated machine is placed on the lettuce and pressed down. Simultaneously, the moving rod is held and moved radially outward along the arc-shaped groove, ensuring the telescopic clamping mechanism is idle and that the lettuce passes through the lettuce perforation hole through the inner cavity of the stem and leaf cutter. The stem and leaf cutter cuts the lettuce stem and leaves, while the gap in the middle is cut by the stem and leaf cutting plate, thus achieving all-round stem and leaf cutting for lettuce of different diameters. After completing the stem and leaf cutting, when the stem and leaf cutter enters the soil and the root cutting mechanism approaches the soil surface, the cutting motor drives the movable cutting blade to rotate until the movable cutting blade and the fixed cutting blade are completely closed, at which point the lettuce cutting is completed. After the cutting is completed, the cutting motor reverses, driving the movable cutting blade back to the starting position. After completing the lettuce root cutting, the moving rod is released, and the moving rod moves radially inward along the arc-shaped groove, activating the auxiliary telescopic clamping mechanism. The middle clamp and side clamp clamp the lettuce, facilitating its removal.

[0046] This invention enables the cutting of lettuce stems and leaves, the shearing of lettuce, and the assisted clamping and pulling out of lettuce, and has the following advantages:

[0047] (1) The whole structure is symmetrical. The stem and leaf cutting plates are connected by tension springs. The structure is simple and easy to disassemble and replace the stem and leaf cutting plates and stem and leaf cutting blades.

[0048] (2) By setting a clamp that can stretch radially, the diameter of the lettuce perforation can be changed, so it can be used for lettuce of different diameters;

[0049] (3) By setting a clamp that can extend and retract radially, it is easy to clamp the lettuce, so that the lettuce can be pulled out more easily;

[0050] (4) The overall structure is simple and lightweight, easy to manufacture, and improves the convenience of use.

[0051] If this invention discloses or relates to components or structural parts that are fixedly connected to each other, then, unless otherwise stated, a fixed connection can be understood as: a fixed connection that can be disassembled (e.g., using bolts or screws), or a fixed connection that cannot be disassembled (e.g., riveting, welding). Of course, a fixed connection can also be replaced by an integral structure (e.g., manufactured by casting) (except where it is obviously impossible to use an integral molding process).

[0052] In addition, unless otherwise stated, the terms used in any of the technical solutions disclosed in this invention to indicate positional relationships or shapes include states or shapes that are similar to, close to, or approximate with those states or shapes.

[0053] Any component provided by this invention can be assembled from multiple individual components or can be a single component manufactured by a one-piece molding process.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of the present invention or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solutions of the present invention, and all such modifications and substitutions should be covered within the scope of the technical solutions claimed in the present invention.

Claims

1. A lettuce leaf removal and harvesting integrated machine, characterized in that: The device includes, from bottom to top, a stem and leaf removal mechanism, a root cutting mechanism, and a telescopic clamping mechanism. The stem and leaf removal mechanism includes a ring-shaped stem and leaf cutter with its cutting edge located at the bottom. The root cutting mechanism includes a cutting base plate with movable and fixed cutters arranged in a V-shape on a horizontal plane. The movable cutters can rotate toward or away from the fixed cutters. The telescopic clamping mechanism includes a fixed base with handles at both the left and right ends. The middle of the fixed base has a lettuce perforation corresponding to the position of the stem and leaf cutter and facilitating the penetration of the lettuce. The lower end of the fixed base has a pair of symmetrically distributed clamping plate assemblies. The pair of clamping plate assemblies are driven by a moving rod to extend and retract radially along the lettuce perforation. The moving rod extends upward to the inside of the handle on the same side. The fixing base includes a pair of left and right symmetrical and spaced fixing blocks. Each fixing block has a clamping seat plate at its bottom for installing the clamping plate assembly. The fixing blocks and the clamping seat plate are coaxially provided with a semi-circular recess that runs vertically through them. The semi-circular recesses of the pair of fixing blocks form a lettuce perforation from the left and right directions. The top surface of the clamping seat plate is provided with an arc-shaped sliding groove, which is coaxially distributed with the semi-circular recess. The arc-shaped sliding groove and the semi-circular recess are connected by three radial sliding grooves, which are evenly distributed around the axis of the semi-circular recess. A transverse sliding groove A, connected to the arc-shaped sliding groove, is provided in the center of the top surface of the clamping seat plate. The transverse sliding groove A corresponds to the radial sliding groove located in the middle position. The clamping plate assembly includes an arc-shaped sliding plate, a middle clamping plate, and two side clamping plates. The arc-shaped sliding plate is set in an arc-shaped sliding groove and can slide radially along the arc-shaped sliding groove. Both the front and rear ends of the arc-shaped sliding plate are provided with arc-shaped movable sliding grooves. The middle clamp is fixedly set in the middle of the bottom surface of the arc-shaped sliding plate. The middle clamp is slidably engaged with the radial sliding groove and the transverse sliding groove A located in the middle position. The two side clamps are respectively slidably engaged with the remaining two radial sliding grooves. The top surface of the outer end of the side clamps is fixed with a vertically set movable sliding rod. The movable sliding rod is slidably engaged with the movable sliding groove. The inner end of the lateral clamp is provided with a limiting flange for abutting against the inner wall of the arc-shaped slide groove. Several compression springs abut against the outer wall of the arc-shaped slide groove and the arc-shaped slide plate. The compression springs extend and retract radially along the arc-shaped slide groove. A handle is fixed to one end of each pair of fixed blocks that are far apart. The handle is vertically arranged and has a horizontal U-shape. A transverse sliding groove B is provided at both the upper and lower ends of the handle. A vertically arranged moving rod is fixed to the top surface of the outer end of the middle clamping plate. The moving rod is slidably connected to the transverse sliding groove B at both the upper and lower ends of the handle located on the same side.

2. The lettuce leaf removal and harvesting integrated machine according to claim 1, characterized in that: The upper end of the stem and leaf cutter is fixed with a cutter seat plate, and the shearing seat plate is set on the cutter seat plate; the clamping seat plate on the right side is set on the top of the shearing seat plate, and a pair of front and rear supporting columns are provided between the clamping seat plate on the left side and the cutter seat plate. The fixing block, clamping seat plate, supporting columns and cutter seat plate on the left side are locked and fixed by the first bolt; the fixing block, clamping seat plate, shearing seat plate and cutter seat plate on the right side are locked and fixed by the second bolt.

3. The lettuce leaf removal and harvesting integrated machine according to claim 1, characterized in that: The shearing base plate is provided with a vertical through hole connecting the lettuce perforation and the inner cavity of the stem and leaf cutter; the fixed shearing blade is fixedly connected to the shearing base plate at one end near the movable shearing blade, and the movable shearing blade is connected to the output shaft of a shearing motor at one end near the fixed shearing blade. The shearing motor is vertically mounted on the shearing base plate and drives the movable shearing blade to rotate.

4. The lettuce leaf removal and harvesting integrated machine according to claim 1, characterized in that: The stem and leaf cutter includes a left stem and leaf cutter and a right stem and leaf cutter that are symmetrically distributed on the left and right sides and spaced apart. Both the left and right stem and leaf cutters are arc-shaped, and the arc edges of the left and right stem and leaf cutters face each other.

5. The lettuce leaf removal and harvesting integrated machine according to claim 1, characterized in that: The front and rear inner sides of the fixing block are provided with recesses, and the top surface of the recesses is provided with transverse sliding grooves C; a stem and leaf cutting plate is vertically provided between the front end and the rear end of the pair of fixing blocks. The stem and leaf cutting plate is located in the recess, the cutting edge of the stem and leaf cutting plate is located at the lower end, and the upper end of the stem and leaf cutting plate is slidably engaged with the transverse sliding grooves C. A pair of transverse tension springs distributed vertically are connected to the left and right ends of the stem and leaf cutting plate. The end of the transverse tension spring away from the stem and leaf cutting plate is connected to the side wall of the recess located on the same side.

6. The lettuce leaf removal and harvesting integrated machine according to claim 1, characterized in that: The handle is fixed to a handle base plate at one end near the fixed block on the same side, and the handle base plate is locked to the fixed block by locking bolts.

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