Asparagus lettuce harvesting device

Abstract

The utility model discloses an asparagus lettuce harvesting device. The asparagus lettuce harvesting device comprises a rack, a first conveying assembly, a second conveying assembly and a leaf cutting assembly. The first conveying belt is provided with a first conveying face arranged upwards. The second conveying belt is provided with a second conveying face arranged downwards, and a first conveying gap used for containing asparagus lettuce is formed between the first conveying face and the second conveying face. The leaf cutting assembly is arranged on the rack and provided with a leaf cutting opening, the leaf cutting opening corresponds to the output end of the first conveying gap, the leaf cutting assembly further comprises a leaf cutting blade, and the edge portion of the leaf cutting blade faces the output end of the first conveying gap. In the moving process, the edge portion of the leaf cutting blade is arranged towards the output end of the first conveying gap, that is, the stem body and the leaf of the asparagus lettuce can be pushed to the edge portion of the leaf cutting blade, the edge portion cuts the root of the leaf when making contact with the root of the leaf, the stem body protrudes out of the leaf cutting assembly from the leaf cutting opening to the other side, and leaf cutting of the asparagus lettuce is completed.

Description

Technical Field

[0001] The utility model relates to the field of agricultural machinery, in particular to a lettuce harvesting device. Background Art

[0002] Lettuce is a kind of vegetable, widely distributed in many regions and widely planted. Usually, lettuce is harvested in summer, although modern agricultural production has made it one of the vegetables available all year round. There are many problems with the traditional way of harvesting lettuce. Due to the changeable growth form of lettuce, the labor force needs to judge according to the growth state and form of the lettuce during the harvesting process and perform complex operations. This not only increases the burden of the labor force, but also easily causes accidental injuries or missed harvests. In addition, the traditional harvesting method is time-consuming and inefficient, which greatly increases the production cost.

[0003] The existing publication number CN 116671338 A, "A Lettuce Harvester and Harvesting Method", provides the structure and use method of a lettuce harvester, but a coarse leaf removing mechanism and a fine leaf removing mechanism are provided in this lettuce harvester. In actual use, the coarse leaf removing mechanism performs coarse leaf removing on the lettuce grown in the field, and then cuts the lettuce. After cutting, the lettuce is clamped in the vertical direction and then moved horizontally to the fine leaf removing mechanism, which controls the fine leaf removing mechanism to remove the leaves of the vertically placed lettuce from top to bottom. This technical solution has the following problems: the structure of the horizontal clamping component is complex, and when the fine leaf removing mechanism is used during the leaf cutting process, the leaf cutting blade moves up and down relative to the lettuce. After the leaf cutting is completed, the blade needs to be moved out of the horizontal moving path of the lettuce before the lettuce is moved out, resulting in low leaf cutting efficiency. Summary of the invention

[0004] In view of this, the purpose of the utility model is to provide a lettuce harvesting device.

[0005] In order to achieve the above technical objectives, the technical solution adopted by the utility model is:

[0006] A lettuce harvesting device comprises a frame, a first conveying assembly, a second conveying assembly and a leaf cutting assembly; the first conveying assembly is arranged on the frame, the first conveying assembly has a first conveying belt, and the first conveying belt has a first conveying surface arranged upward; the second conveying assembly is arranged on the frame, the second conveying assembly has a second conveying belt, and the second conveying belt has a second conveying surface arranged downward, the first conveying surface and the second conveying surface are arranged opposite to each other, and a first conveying gap for accommodating lettuce is formed between the first conveying surface and the second conveying surface; the leaf cutting assembly is arranged on the frame, the leaf cutting assembly has a leaf cutting opening, and the leaf cutting opening is arranged corresponding to the output end of the first conveying gap, and the leaf cutting assembly also includes a leaf cutting blade, and the blade of the leaf cutting blade is arranged toward the output end of the first conveying gap.

[0007] In some embodiments, the first conveying component includes a first driving unit, a first driving wheel, a first driven wheel and a first tensioning wheel group, the first driving unit is arranged on the frame; the first driving wheel is movably arranged on the frame, and the first driving wheel is transmission-connected to the output end of the first driving unit; the first driven wheel is arranged opposite to the first driving wheel, the first conveyor belt is sleeved on the first driving wheel and the first driven wheel, and the upward side of the first conveyor belt is the first conveying surface; the first tensioning wheel group includes at least one first tensioning wheel, at least one first tensioning wheel is arranged below the first conveying surface, and the outer surface of the first tensioning wheel is in contact with the first conveying surface.

[0008] In some embodiments, the second conveying assembly includes a second driving unit, a second driving wheel, a second driven wheel and a second tensioning wheel group, and the second driving unit is arranged on the frame; the second driving wheel is movably arranged on the frame, and the second driving wheel is transmission-connected to the output end of the second driving unit; the second driven wheel is arranged opposite to the second driving wheel, and the second conveyor belt is sleeved on the second driving wheel and the second driven wheel, and the downward side of the second conveyor belt is the second conveying surface; the second tensioning wheel group includes at least one second tensioning wheel, and at least one second tensioning wheel is arranged above the second conveying surface, and the outer surface of the second tensioning wheel is in contact with the second conveying surface.

[0009] In some embodiments, the first tensioning wheel has a first tensioning wheel shaft, the second tensioning wheel has a second tensioning wheel shaft, the harvesting device also includes an adjusting component, the adjusting component is arranged on the frame, the adjusting component includes an adjusting plate, a first connecting rod and a second connecting rod, the adjusting plate is arranged on the frame in a vertical direction, a first slot hole and a second slot hole are provided on the adjusting plate, the first tensioning wheel shaft and the adjusting plate are slidably connected to the first slot hole, the second tensioning wheel shaft and the adjusting plate are movably connected to the second slot hole, the first connecting rod is connected to the first tensioning wheel shaft, the second connecting rod is connected to the second tensioning wheel shaft, the first connecting rod and the second connecting rod are movably connected, the first connecting rod and the second connecting rod can drive the first tensioning wheel shaft and the second tensioning wheel shaft to move relative to each other, adjust the distance between the first tensioning wheel and the second tensioning wheel, so as to adjust the size of the first conveying gap.

[0010] In some embodiments, the slot body of the first slot hole extends in the vertical direction, the slot body of the second slot hole extends in the vertical direction, a first hinge hole is further provided on the adjustment plate, the first hinge hole is arranged between the first slot hole and the second slot hole, the adjustment assembly also includes a third connecting rod, the third connecting rod and the adjustment plate are hinged at the first hinge hole, a first connecting hole and a second connecting hole are further provided on the third connecting rod, the first connecting hole and the second connecting hole are symmetrically arranged with the hinge axis of the third connecting rod as the center, the first connecting rod and the third connecting rod are connected to the first connecting hole, and the second connecting rod and the third connecting rod are connected to the second connecting hole.

[0011] In some embodiments, the third connecting rod has a first extension end, the first extension end is arranged on the side where the first connecting hole is located, and the first extension end is provided with a first adjustment hole; the adjustment assembly also includes a first elastic member, one end of the first elastic member is connected to the frame, and the other end of the first elastic member is connected to the first extension end at the first adjustment hole, and the first elastic member is used to adjust the rotation angle of the third connecting rod relative to the adjustment plate.

[0012] In some embodiments, there are two adjustment assemblies, which are symmetrically arranged on both sides of the first tensioning wheel shaft.

[0013] In some embodiments, there are three first tension wheels, which are arranged in sequence and spaced apart along the conveying direction of the first conveyor belt; and there are three second tension wheels, which are arranged in sequence and spaced apart along the conveying direction of the second conveyor belt.

[0014] In some embodiments, the leaf cutting assembly includes a fixing ring, an elastic assembly, a first guide shaft and a leaf cutting blade, and the center of the fixing ring has a leaf cutting opening; the elastic assembly includes a first connecting plate, a second connecting plate and a second elastic member, and the two ends of the second elastic member are respectively connected to the first connecting plate and the second connecting plate, and the first connecting plate is arranged on the inner wall of the fixing ring, and the first connecting plate, the second elastic member and the second connecting plate are distributed in sequence along the edge of the fixing ring toward the center point of the fixing ring; the first guide shaft is connected to the second connecting plate, and the first guide shaft includes a first suspended end, and the first suspended end protrudes out of the second connecting plate toward the center point of the fixing ring; the leaf cutting blade includes a first fixing portion and a first cutting portion, the first fixing portion is connected to the first suspended end, the first cutting portion is arranged at a preset angle with the first fixing portion, and the first cutting portion has a blade.

[0015] In some embodiments, it also includes a first output roller and a second output roller, the first output roller is arranged on the frame, and the first output roller is arranged on the side of the leaf cutting port away from the first conveying gap; the second output roller is arranged on the frame, and the second output roller is arranged opposite to the first output roller to form a second conveying gap, and the second conveying gap is used to output lettuce.

[0016] By adopting the above technical solution, the utility model has the following beneficial effects compared with the prior art:

[0017] The harvesting device includes a frame, a first conveying component, a second conveying component and a leaf cutting component; the first conveying component has a first conveying belt, and the first conveying belt has a first conveying surface arranged upward; the second conveying component is arranged on the frame, and the second conveying component has a second conveying belt, and the second conveying belt has a second conveying surface arranged downward, the first conveying surface and the second conveying surface are arranged opposite to each other, and a first conveying gap for accommodating lettuce is formed between the first conveying surface and the second conveying surface; the leaf cutting component is arranged on the frame, and the leaf cutting component has a leaf cutting opening, and the leaf cutting opening is arranged corresponding to the output end of the first conveying gap, and the leaf cutting component also includes a leaf cutting blade, and the cutting edge of the leaf cutting blade is arranged toward the output end of the first conveying gap. When in use, the lettuce is clamped between the first conveying surface and the second conveying surface, and is moved at a uniform speed in a horizontal state toward the leaf cutting opening under the transmission of the first conveyor belt and the second conveyor belt. During the movement, the blade of the leaf cutting blade is arranged toward the output end of the first conveying gap, that is, the stem body and leaves of the lettuce will be pushed to the blade of the leaf cutting blade, and the blade will cut the root of the leaf when it touches the root of the leaf, and the stem body protrudes out of the leaf cutting opening to the other side of the leaf cutting assembly, thus completing the cutting of the lettuce. In this process, the lettuce is fed in a horizontal direction, and the leaf cutting blade is kept fixed to complete the leaf cutting, and there is no need to consider the resetting problem of the leaf cutting blade. When the first conveyor belt and the second conveyor belt continue to keep the lettuce conveying, the continuous leaf cutting effect of the lettuce can be achieved, and the lettuce does not need to move back and forth, and the leaf cutting blade does not need to move back and forth, thereby effectively improving the leaf cutting efficiency of the lettuce. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 is a first schematic diagram of a lettuce harvesting device;

[0020] Figure 2 is a second schematic diagram of a lettuce harvesting device;

[0021] Figure 3 yes Figure 2 A partial enlarged schematic diagram of

[0022] Figure 4 is a schematic cross-sectional view of a lettuce harvesting device;

[0023] Figure 5 is a first schematic diagram of a leaf cutting assembly;

[0024] Figure 6is a second schematic diagram of the leaf cutting assembly.

[0025] Reference numerals:

[0026] 1. Frame;

[0027] 2. A first conveying assembly;

[0028] 21. The first conveyor belt;

[0029] 22. First driving wheel;

[0030] 23. First driven wheel;

[0031] 24. The first tensioning wheel assembly;

[0032] 241, first tensioning wheel;

[0033] 242, first tensioning wheel shaft;

[0034] 3. The second conveying assembly;

[0035] 31. Second conveyor belt;

[0036] 32. Second driving wheel;

[0037] 33. Second driven wheel;

[0038] 34. Second tensioning wheel assembly;

[0039] 341, second tensioning wheel;

[0040] 342, second tensioning wheel shaft;

[0041] 4. Leaf cutting assembly;

[0042] 41. Leaf cutting blade;

[0043] 42. Leaf cutting port;

[0044] 43. Fixed ring;

[0045] 44. Elastic components;

[0046] 441, first connecting plate;

[0047] 442, second connecting plate;

[0048] 443, a second elastic member;

[0049] 45. A first guide shaft;

[0050] 5. The first conveying gap;

[0051] 6. Adjustment components;

[0052] 61. Adjustment plate;

[0053] 611, first slot;

[0054] 612, second slot;

[0055] 62. First connecting rod;

[0056] 63. Second connecting rod;

[0057] 64. Third connecting rod;

[0058] 65. a first elastic member;

[0059] 71. First output roller shaft;

[0060] 72. Second output roller shaft;

[0061] 8. Stem body. DETAILED DESCRIPTION

[0062] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is particularly noted that the following embodiments are only used to illustrate the present invention, but do not limit the scope of the present invention. Similarly, the following embodiments are only partial embodiments of the present invention rather than all embodiments. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0063] See also Figures 1 to 6 The present embodiment provides a lettuce harvesting device, comprising a frame 1, a first conveying assembly 2, a second conveying assembly 3 and a leaf cutting assembly 4; the first conveying assembly 2 is arranged on the frame 1, the first conveying assembly 2 has a first conveying belt 21, and the first conveying belt 21 has a first conveying surface arranged upward; the second conveying assembly 3 is arranged on the frame 1, the second conveying assembly 3 has a second conveying belt 31, the second conveying belt 31 has a second conveying surface arranged downward, the first conveying surface and the second conveying surface are arranged opposite to each other, and a first conveying gap 5 for accommodating lettuce is formed between the first conveying surface and the second conveying surface; the leaf cutting assembly 4 is arranged on the frame 1, the leaf cutting assembly 4 has a leaf cutting opening 42, the leaf cutting opening 42 is arranged corresponding to the output end of the first conveying gap 5, and the leaf cutting assembly 4 also includes a leaf cutting blade 41, and the blade portion of the leaf cutting blade 41 is arranged toward the output end of the first conveying gap 5.

[0064] In this embodiment, the frame 1 can be formed by building up aluminum profiles, and the specific shape and structure can be set according to actual needs, such as Figure 1An embodiment of the frame 1 is shown. The first conveying assembly 2 and the second conveying assembly 3 can be understood as equipment for conveying lettuce. In this embodiment, the first conveying assembly 2 and the second conveying assembly 3 are arranged relatively from bottom to top. Specifically, the first conveying assembly 2 has a first conveyor belt 21, which is also a conveyor belt structure. The upward side of the first conveyor belt 21 is recorded as the first conveying surface, that is, the side that is in direct contact with the lettuce. Similarly, the second conveying assembly 3 has a second conveyor belt 31, which is also a conveyor belt structure. The downward side of the second conveyor belt 31 is recorded as the second conveying surface, that is, the side that is in direct contact with the lettuce. There is a first conveying gap 5 between the first conveying surface and the second conveying surface. After cutting, the lettuce is placed in the first conveying gap 5 and will be conveyed to the leaf cutting blade 41 under the transmission of the first conveyor belt 21 and the second conveyor belt 31.

[0065] It should be noted here that after the lettuce is cut, it is conveyed in a state roughly parallel to the conveying direction of the first conveyor belt 21. Preferably, in some embodiments, a stopper may be provided so that the lettuce is as centrally arranged as possible in the first conveying gap 5. The first conveying gap 5 may be slightly smaller than the size of the stem body 8 of the lettuce, so that the first conveying surface and the second conveying surface can fully contact the stem body 8 of the lettuce, and the stem body 8 can be effectively clamped in the first conveying gap 5 without being offset relative to the first conveyor belt 21 or the second conveyor belt 31.

[0066] In this embodiment, a leaf cutting assembly 4 is also provided. The leaf cutting assembly 4 is arranged on the frame 1. The leaf cutting assembly 4 has a leaf cutting opening 42. The leaf cutting opening 42 is arranged toward the output end of the first conveying gap 5, that is, the stem body 8 and the leaves of the lettuce enter the leaf cutting opening 42 of the leaf cutting assembly 4 after conveying, wherein the stem body 8 can pass through the leaf cutting opening 42 and continue to be conveyed under the action of the first conveyor belt 21 and the second conveyor belt 31 until the entire stem body 8 extends out from the leaf cutting opening 42. The blade of the leaf cutting blade 41 is arranged toward the output end of the first conveying gap 5. Specifically, the blade of the leaf cutting blade 41 is arranged at the edge of the leaf cutting opening 42, close to the edge of the leaf cutting opening 42, so as to cut the root of the leaf on the outer surface of the stem body 8 to avoid the problem of excessive length of the stem body of the leaf residue. As some preferred embodiments, the leaf cutter blade 41 can be arranged in a circular shape on the edge of the leaf cutting mouth 42, or a plurality of leaf cutter blades 41 are arranged and evenly distributed along the edge of the leaf cutting mouth 42; or the leaf cutter blade 41 can be arranged to rotate repeatedly relative to the edge of the leaf cutting mouth 42 so as to fully cut the peripheral leaves of the stem body 8.

[0067] When the present embodiment is in use, the lettuce is clamped between the first conveying surface and the second conveying surface, and is moved at a uniform speed in a horizontal state toward the leaf cutting opening 42 under the conveyance of the first conveyor belt 21 and the second conveyor belt 31. During the movement, the blade of the leaf cutting blade 41 is arranged toward the output end of the first conveying gap 5, that is, the stem body 8 and the leaves of the lettuce are pushed to the blade of the leaf cutting blade 41, and the blade cuts the root of the leaf when it touches the root of the leaf, and the stem body 8 continues to protrude from the leaf cutting opening 42 to the other side of the leaf cutting assembly 4. When the stem body 8 is completely moved out of the leaf cutting opening 42, the cutting of the lettuce leaves is completed. In this process, the lettuce is fed in a horizontal direction, and the leaf cutting is completed in the form of keeping the leaf cutting blade 41 fixed. There is no need to consider the resetting problem of the leaf cutting blade 41. When the first conveyor belt 21 and the second conveyor belt 31 continue to keep the lettuce conveyed, the continuous leaf cutting effect of the lettuce can be achieved. The lettuce does not need to move back and forth, and the leaf cutting blade 41 does not need to move back and forth, thereby effectively improving the leaf cutting efficiency of the lettuce.

[0068] See also Figures 2 to 4 In some embodiments, the first conveying assembly 2 includes a first driving unit, a first driving wheel 22, a first driven wheel 23 and a first tensioning wheel group 24, and the first driving unit is arranged on the frame 1; the first driving wheel 22 is movably arranged on the frame 1, and the first driving wheel 22 is transmission-connected with the output end of the first driving unit; the first driven wheel 23 is arranged opposite to the first driving wheel 22, and the first conveying belt 21 is sleeved on the first driving wheel 22 and the first driven wheel 23, and the upward side of the first conveying belt 21 is the first conveying surface; the first tensioning wheel group 24 includes at least one first tensioning wheel 241, and at least one first tensioning wheel 241 is arranged below the first conveying surface, and the outer surface of the first tensioning wheel 241 is in contact with the first conveying surface.

[0069] In this embodiment, the first conveying assembly 2 also includes a first driving unit, which can be understood as a servo motor to drive the first driving wheel 22 to rotate at a uniform speed. The first driven wheel 23 is arranged relative to the first driving wheel 22, that is, the first conveyor belt 21 is sleeved on the first driving wheel 22 and the first driven wheel 23 to form a conveyor belt structure. In this embodiment, a first tensioning wheel group 24 is also provided between the first driving wheel 22 and the first driven wheel 23. The first tensioning wheel group 24 includes at least one first tensioning wheel 241. The first tensioning wheel 241 is arranged below the first conveying surface. Preferably, the first tensioning wheel 241 is slightly higher than the first driven wheel 23 and the first driving wheel 22 to raise the first conveying surface, so that the first conveying surface will not produce downward concave elastic deformation during the process of conveying the lettuce, thereby increasing the friction between the first conveying surface and the stem body 8 of the lettuce.

[0070] Likewise, see Figures 2 to 4In some embodiments, the second conveying assembly 3 includes a second driving unit, a second driving wheel 32, a second driven wheel 33 and a second tensioning wheel group 34, and the second driving unit is arranged on the frame 1; the second driving wheel 32 is movably arranged on the frame 1, and the second driving wheel 32 is transmission-connected with the output end of the second driving unit; the second driven wheel 33 is arranged opposite to the second driving wheel 32, and the second conveying belt 31 is sleeved on the second driving wheel 32 and the second driven wheel 33, and the downward side of the second conveying belt 31 is the second conveying surface; the second tensioning wheel group 34 includes at least one second tensioning wheel 341, and at least one second tensioning wheel 341 is arranged above the second conveying surface, and the outer surface of the second tensioning wheel 341 is in contact with the second conveying surface.

[0071] In this embodiment, the second conveying assembly 3 also includes a second driving unit, which can be understood as a servo motor to drive the second driving wheel 32 to rotate at a uniform speed. The second driven wheel 33 is arranged opposite to the second driving wheel 32, that is, the second conveyor belt 31 is sleeved on the second driving wheel 32 and the second driven wheel 33 to form a conveyor belt structure. In this embodiment, a second tensioning wheel group 34 is also provided between the second driving wheel 32 and the second driven wheel 33. The second tensioning wheel group 34 includes at least one second tensioning wheel 341. The second tensioning wheel 341 is arranged above the second conveying surface. Preferably, the second tensioning wheel 341 is slightly lower than the second driven wheel 33 and the second driving wheel 32 to depress the second conveying surface, so that the second conveying surface will not produce elastic deformation that bulges upward during the process of conveying the lettuce, thereby increasing the friction between the second conveying surface and the stem body 8 of the lettuce.

[0072] In some optional embodiments, the first drive unit and the second drive unit can be the same drive unit, that is, one servo motor can simultaneously drive the first driving wheel 22 and the second driving wheel 32 to rotate. This method can be achieved by adding a gear transmission structure or a synchronous belt pulley transmission structure to reduce the number of drive units and reduce manufacturing costs.

[0073] This embodiment shows the specific arrangement structure of the first conveyor belt 21 and the second conveyor belt 31, wherein the arrangement of the first tensioning wheel 241 and the second tensioning wheel 341 can sufficiently reduce the deformation of the first conveyor belt 21 and the second conveyor belt 31 when they come into contact with the lettuce, thereby increasing the friction between the first conveying surface, the second conveying surface and the lettuce, and achieving the effect of clamping the lettuce and stably conveying it.

[0074] See also Figure 3In some embodiments, the first tensioning wheel 241 has a first tensioning wheel shaft 242, the second tensioning wheel 341 has a second tensioning wheel shaft 342, the harvesting device further includes an adjustment component 6, the adjustment component 6 is arranged on the frame 1, the adjustment component 6 includes an adjustment plate 61, a first connecting rod 62 and a second connecting rod 63, the adjustment plate 61 is arranged on the frame 1 in a vertical direction, the adjustment plate 61 is provided with a first slot 611 and a second slot 612, the first tensioning wheel shaft 242 and the adjustment plate 61 are slidably connected to the first tensioning wheel shaft 242 and the second tensioning wheel shaft 242. A slot hole 611, the second tensioning wheel shaft 342 and the adjustment plate 61 are movably connected to the second slot hole 612, the first connecting rod 62 is connected to the first tensioning wheel shaft 242, the second connecting rod 63 is connected to the second tensioning wheel shaft 342, the first connecting rod 62 and the second connecting rod 63 are movably connected, the first connecting rod 62 and the second connecting rod 63 can drive the first tensioning wheel shaft 242 and the second tensioning wheel shaft 342 to move relative to each other, adjust the distance between the first tensioning wheel 241 and the second tensioning wheel 341, so as to adjust the size of the first conveying gap 5.

[0075] In this embodiment, the first tensioning wheel 241 has a first tensioning wheel shaft 242, and the first tensioning wheel shaft 242 and the first tensioning wheel 241 can be fixedly connected or rotatably connected. This embodiment does not limit the connection method between the first tensioning wheel 241 and the first tensioning wheel shaft 242. Similarly, the connection method between the second tensioning wheel 341 and the second tensioning wheel shaft 342 can be the same as the connection method between the first tensioning wheel 241 and the first tensioning wheel shaft 242.

[0076] In this embodiment, the harvesting device also includes an adjusting component 6. Specifically, the adjusting component 6 can adjust the distance between the first tensioning wheel shaft 242 and the second tensioning wheel shaft 342, thereby realizing the adjustment of the distance between the first tensioning wheel 241 and the second tensioning wheel 341, and further realizing the adjustment of the distance between the first conveying surface and the second conveying surface, that is, the adjustment of the size of the first conveying gap 5.

[0077] Specifically, the adjustment assembly 6 includes an adjustment plate 61, a first connecting rod 62 and a second connecting rod 63, see Figure 3 One end of the first connecting rod 62 is connected to the first tensioning wheel shaft 242, and one end of the second connecting rod 63 is connected to the second tensioning wheel shaft 342. The first connecting rod 62 and the second connecting rod 63 are movably connected. In this way, when the first tensioning wheel shaft 242 moves, it can drive the first connecting rod 62 and the second connecting rod 63 to move, thereby realizing the movement of the second tensioning wheel shaft 342, that is, the transmission adjustment of the first tensioning wheel shaft 242 and the second tensioning wheel shaft 342.

[0078] Furthermore, a first slot hole 611 and a second slot hole 612 are provided on the adjustment plate 61. The first slot hole 611 is a long slot hole, and the second slot hole 612 is a long slot hole. The first tensioning wheel shaft 242 passes through the first slot hole 611 and protrudes out to the outside to be connected to the first connecting rod 62. When the first tensioning wheel shaft 242 moves, it specifically moves along the extension direction of the slot body of the first slot hole 611. Similarly, the second tensioning wheel shaft 342 passes through the second slot hole 612 and protrudes out to the outside to be connected to the second connecting rod 63. When the second tensioning wheel shaft 342 moves, it specifically moves along the extension direction of the slot body of the second slot hole 612. The moving directions of the first tensioning wheel shaft 242 and the second tensioning wheel shaft 342 are constrained by the adjustment plate 61, and the first connecting rod 62 and the second connecting rod 63 can realize the transmission operation of the first tensioning wheel shaft 242 and the second tensioning wheel shaft 342.

[0079] When the stem body 8 of the lettuce is too large to squeeze the first tension wheel 241 and the second tension wheel 341, the first tension wheel 241 and the second tension wheel 341 can move away from each other along the adjustment plate 61 to expand the size of the first conveying gap 5, and the friction between the first conveying surface, the second conveying surface and the lettuce is reduced, avoiding the lettuce being too large and stuck in the first conveying gap 5 and unable to move forward. Similarly, when the lettuce of larger size passes through and the lettuce of smaller size is input into the first conveying gap 5, the first tension wheel shaft 242 and the second tension wheel shaft 342 can move toward each other due to their own weight, thereby automatically reducing the size of the first conveying gap 5, so that the friction between the first conveying surface, the second conveying surface and the lettuce is relatively increased, avoiding the problem that the lettuce is too small to be clamped and cannot be conveyed.

[0080] This embodiment realizes automatic fine-tuning operation of the first conveying gap 5 for lettuces of different sizes by setting the adjustment component 6, so as to maintain effective clamping and conveying of the lettuces in the first conveying gap 5 and reduce the probability of the lettuces getting stuck or falling off in the first conveying gap 5.

[0081] For further information, see Figure 3 In some embodiments, the groove body of the first slot hole 611 extends in the vertical direction, and the groove body of the second slot hole 612 extends in the vertical direction. A first hinge hole is also provided on the adjustment plate 61, and the first hinge hole is arranged between the first slot hole 611 and the second slot hole 612. The adjustment assembly 6 also includes a third connecting rod 64, and the third connecting rod 64 and the adjustment plate 61 are hinged at the first hinge hole. A first connecting hole and a second connecting hole are also provided on the third connecting rod 64. The first connecting hole and the second connecting hole are symmetrically arranged with the hinge axis of the third connecting rod 64 as the center. The first connecting rod 62 and the third connecting rod 64 are connected to the first connecting hole, and the second connecting rod 63 and the third connecting rod 64 are connected to the second connecting hole.

[0082] In this embodiment, the groove body of the first slot hole 611 extends in the vertical direction, and the groove body of the second slot hole 612 extends in the vertical direction, so that the moving paths of the first tensioning wheel shaft 242 and the second tensioning wheel shaft 342 are constrained to move in the vertical direction. A first hinge hole is also provided on the adjustment plate 61, and preferably, the first hinge hole is arranged between the first slot hole 611 and the second slot hole 612. The adjustment component 6 also includes a third connecting rod 64, and the third connecting rod 64 and the adjustment plate 61 are hinged at the first hinge hole, and one end of the third connecting rod 64 is hinged to the first connecting rod 62, and the other end of the third connecting rod 64 is hinged to the second connecting rod 63, so the first connecting rod 62, the second connecting rod 63 and the third connecting rod 64 form a connecting rod transmission group structure to realize the transmission connection of the first tensioning wheel shaft 242 and the second tensioning wheel shaft 342. When the first connecting rod 62 moves downward under the drive of the first tensioning wheel shaft 242, the second connecting rod 63 will also move upward accordingly, that is, it drives the second tensioning wheel shaft 342 to move upward, thereby realizing the movement operation of the first tensioning wheel shaft 242 and the second tensioning wheel shaft 342 away from each other. Similarly, when the first connecting rod 62 moves upward under the drive of the first tensioning wheel shaft 242, it drives the second connecting rod 63 to move downward, and the second connecting rod 63 drives the second tensioning wheel shaft 342 to move downward, thereby realizing the operation of the first tensioning wheel shaft 242 and the second tensioning wheel shaft 342 moving toward each other.

[0083] For further information, see Figure 3 In some embodiments, the third connecting rod 64 has a first extending end, which is arranged on the side where the first connecting hole is located, and a first adjustment hole is provided on the first extending end; the adjustment assembly 6 also includes a first elastic member 65, one end of the first elastic member 65 is connected to the frame 1, and the other end of the first elastic member 65 is connected to the first extending end at the first adjustment hole, and the first elastic member 65 is used to adjust the rotation angle of the third connecting rod 64 relative to the adjustment plate 61.

[0084] In this embodiment, the third connecting rod 64 has a first extension end, and a first adjustment hole is provided on the first extension end. The first elastic member 65 is connected to the third connecting rod 64 at the first adjustment hole, and the other end of the first elastic member 65 is vertically downwardly locked and connected to the frame 1. When in use, the first elastic member 65 has a preload force, and under normal conditions, it can drive the third connecting rod 64, the first connecting rod 62 and the second connecting rod 63 to maintain a certain angle setting, so as to achieve the maintenance of the spacing between the first tensioning wheel shaft 242 and the second tensioning wheel shaft 342. When the first tensioning wheel shaft 242 is pressed and moves downward, the first elastic member 65 is stretched. When the pressure on the first tensioning wheel shaft 242 disappears, the elastic potential energy of the first elastic member 65 is released, driving the first tensioning wheel shaft 242 to reset, thereby realizing the automatic reset operation of the first tensioning wheel shaft 242, and also enabling the lettuce to always be transported in the corresponding position with the leaf cutting mouth 42 when being transported in the first conveying gap 5.

[0085] In some embodiments, there are two adjustment components 6, which are symmetrically arranged on both sides of the first tensioning wheel shaft 242. This method can achieve a consistent fine-tuning effect on both sides of the first tensioning wheel shaft 242 and the second tensioning wheel shaft 342, and avoid the first conveying surface and the second conveying surface from tilting.

[0086] See also Figure 4 In some embodiments, the number of the first tensioning wheels 241 is three, which are arranged at intervals in sequence along the conveying direction of the first conveyor belt 21; the number of the second tensioning wheels 341 is three, which are arranged at intervals in sequence along the conveying direction of the second conveyor belt 31.

[0087] See also Figure 5 and Figure 6 In some embodiments, the leaf cutting assembly 4 includes a fixing ring 43, an elastic assembly 44, a first guide shaft 45 and a leaf cutting blade 41, and the center of the fixing ring 43 has a leaf cutting opening 42; the elastic assembly 44 includes a first connecting plate 441, a second connecting plate 442 and a second elastic member 443, and the two ends of the second elastic member 443 are respectively connected to the first connecting plate 441 and the second connecting plate 442, and the first connecting plate 441 is arranged on the inner side wall of the fixing ring 43, and the first connecting plate 441, the second elastic member 443 and the second connecting plate 442 are sequentially distributed along the edge of the fixing ring 43 toward the center point of the fixing ring 43; the first guide shaft 45 is connected to the second connecting plate 442, and the first guide shaft 45 includes a first suspended end, and the first suspended end protrudes from the second connecting plate 442 toward the center point of the fixing ring 43; the leaf cutting blade 41 includes a first fixing portion and a first cutting portion, the first fixing portion is connected to the first suspended end, the first cutting portion and the first fixing portion are arranged at a preset angle, and the first cutting portion has a blade.

[0088] In this embodiment, the fixing ring 43 is an annular structure, and the center of the fixing ring 43 is the leaf cutting opening 42, and the stem body 8 of the lettuce can pass through the fixing ring 43. A first connecting plate 441 is provided on the inner wall of the fixing ring 43, and a second elastic member 443 is arranged between the first connecting plate 441 and the second connecting plate 442. The second elastic member 443 can be a spring. The second connecting plate 442 is arranged near the center point of the fixing ring 43. A first guide shaft 45 is provided on the second connecting plate 442, and a leaf cutting blade 41 is provided at the first suspended end of the first guide shaft 45. Specifically, the leaf cutting blade 41 is as shown in FIG. Figure 5 and Figure 6As shown, there is a first cutting part and a first fixing part, and the first cutting part is arranged at an angle with the first fixing part. In this embodiment, the first fixing part and the first cutting part are arranged in sequence along the conveying direction of the lettuce, so that when the lettuce is fed into the leaf cutting opening 42, the first fixing part first contacts the outside of the lettuce, and in some states, the first fixing part is squeezed by the size of the stem body 8 to compress the second elastic member 443, so that the first cutting part moves outward, and when the stem body 8 of the lettuce moves to the first cutting part, the first cutting part does not cut the stem body 8, but cuts the leaves on the stem body 8. In this embodiment, the leaves on the stem body 8 can be squeezed and bent by the first fixing part to expose the root of the leaf to the blade of the first cutting part for easy cutting.

[0089] This embodiment utilizes the form of one-way transportation of lettuce and sets the leaf cutting component 4 in the conveying direction of the lettuce. When the lettuce is continuously conveyed to the leaf cutting port 42 in the first conveying gap 5 and protrudes out of the leaf cutting port 42, the leaf cutting component 4 can realize continuous cutting of the lettuce, thereby significantly improving the leaf cutting efficiency.

[0090] In some embodiments, Figure 5 As shown, there are multiple leaf cutting blades 41 evenly distributed along the circumference of the leaf cutting opening 42 to achieve sufficient cutting of the leaves on the periphery of the stem body 8.

[0091] See also Figure 2 In some embodiments, it also includes a first output roller 71 and a second output roller 72. The first output roller 71 is arranged on the frame 1, and the first output roller 71 is arranged on the side of the leaf cutting port 42 away from the first conveying gap 5; the second output roller 72 is arranged on the frame 1, and the second output roller 72 is arranged opposite to the first output roller 71 to form a second conveying gap, and the second conveying gap is used to output lettuce.

[0092] In this embodiment, the first conveying roller and the second conveying roller are symmetrically arranged at the leaf cutting opening 42, and the leaf cutting opening 42 is arranged away from the side where the first conveying gap 5 is located. A second conveying gap is formed between the first conveying roller and the second conveying roller, and the lettuce enters the leaf cutting opening 42 from the first conveying gap 5 driven by the first conveying assembly 2 and the second conveying assembly 3, and protrudes out of the leaf cutting opening 42 after cutting. At this time, the lettuce will enter the second conveying gap to keep the lettuce always coaxial with the leaf cutting opening 42 or nearly centered during the leaf cutting process, so as to avoid the bending of the lettuce causing the leaf cutting blade 41 to cut the stem body 8. At the same time, a storage bag or a collection basket can be set at the output end of the second conveying gap to store the cut stem body 8.

[0093] The harvesting device includes a frame 1, a first conveying component 2, a second conveying component 3 and a leaf cutting component 4; the first conveying component 2 has a first conveying belt 21, and the first conveying belt 21 has a first conveying surface arranged upward; the second conveying component 3 is arranged on the frame 1, and the second conveying component 3 has a second conveying belt 31, and the second conveying belt 31 has a second conveying surface arranged downward, the first conveying surface and the second conveying surface are arranged opposite to each other, and a first conveying gap 5 for accommodating lettuce is formed between the first conveying surface and the second conveying surface; the leaf cutting component 4 is arranged on the frame 1, and the leaf cutting component 4 has a leaf cutting opening 42, and the leaf cutting opening 42 is arranged corresponding to the output end of the first conveying gap 5, and the leaf cutting component 4 also includes a leaf cutting blade 41, and the blade portion of the leaf cutting blade 41 is arranged toward the output end of the first conveying gap 5. When in use, the lettuce is clamped between the first conveying surface and the second conveying surface, and is moved at a uniform speed in a horizontal state toward the leaf cutting opening 42 under the conveyance of the first conveyor belt 21 and the second conveyor belt 31. During the movement, the blade of the leaf cutting blade 41 is arranged toward the output end of the first conveying gap 5, that is, the stem body 8 and the leaves of the lettuce will be pushed to the blade of the leaf cutting blade 41, and the blade will cut the root of the leaf when it touches the root of the leaf, and the stem body 8 protrudes out of the leaf cutting assembly 4 to the other side from the leaf cutting opening 42, that is, the cutting of the lettuce is completed. In this process, the lettuce is fed in a horizontal direction, and the leaf cutting blade 41 is kept fixed to complete the leaf cutting. There is no need to consider the resetting problem of the leaf cutting blade 41. When the first conveyor belt 21 and the second conveyor belt 31 continue to keep the lettuce conveying, the continuous leaf cutting effect of the lettuce can be achieved. The lettuce does not need to move back and forth, and the leaf cutting blade 41 does not need to move back and forth, thereby effectively improving the leaf cutting efficiency of the lettuce.

[0094] The above descriptions are only some embodiments of the present invention, and do not limit the protection scope of the present invention. Any equivalent device or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A lettuce harvesting device, characterized in that: include: frame; A first conveying assembly is arranged on the frame, wherein the first conveying assembly comprises a first conveying belt, and the first conveying belt comprises a first conveying surface arranged upward; A second conveying assembly is arranged on the frame, the second conveying assembly comprises a second conveying belt, the second conveying belt comprises a second conveying surface arranged downward, the first conveying surface and the second conveying surface are arranged opposite to each other, and a first conveying gap for accommodating lettuce is formed between the first conveying surface and the second conveying surface; A leaf cutting assembly is arranged on the frame, and the leaf cutting assembly has a leaf cutting opening, and the leaf cutting opening is arranged corresponding to the output end of the first conveying gap. The leaf cutting assembly also includes a leaf cutting blade, and the cutting edge of the leaf cutting blade is arranged toward the output end of the first conveying gap.

2. The lettuce harvesting device according to claim 1, characterized in that: The first conveying assembly comprises: A first driving unit, arranged on the frame; A first driving wheel, movably disposed on the frame, the first driving wheel being drivingly connected to an output end of the first driving unit; A first driven wheel is arranged opposite to the first driving wheel, the first conveyor belt is sleeved on the first driving wheel and the first driven wheel, and the upward side of the first conveyor belt is the first conveying surface; The first tensioning wheel group includes at least one first tensioning wheel, and the at least one first tensioning wheel is arranged below the first conveying surface, and the outer surface of the first tensioning wheel is in contact with the first conveying surface.

3. The lettuce harvesting device according to claim 2, characterized in that: The second conveying assembly comprises: A second driving unit is arranged on the frame; A second driving wheel, movably disposed on the frame, the second driving wheel being drivingly connected to an output end of the second driving unit; A second driven wheel is arranged opposite to the second driving wheel, the second conveyor belt is sleeved on the second driving wheel and the second driven wheel, and the downward side of the second conveyor belt is the second conveying surface; The second tensioning wheel assembly includes at least one second tensioning wheel, wherein the at least one second tensioning wheel is arranged above the second conveying surface, and an outer surface of the second tensioning wheel is in contact with the second conveying surface.

4. The lettuce harvesting device according to claim 3, characterized in that: The first tension wheel has a first tension wheel shaft, the second tension wheel has a second tension wheel shaft, and the harvesting device further includes: An adjusting assembly is arranged on the frame, and the adjusting assembly includes an adjusting plate, a first connecting rod and a second connecting rod, the adjusting plate is arranged on the frame in a vertical direction, a first slot hole and a second slot hole are provided on the adjusting plate, the first tensioning wheel shaft and the adjusting plate are slidably connected to the first slot hole, the second tensioning wheel shaft and the adjusting plate are movably connected to the second slot hole, the first connecting rod is connected to the first tensioning wheel shaft, the second connecting rod is connected to the second tensioning wheel shaft, the first connecting rod and the second connecting rod are movably connected, the first connecting rod and the second connecting rod can drive the first tensioning wheel shaft and the second tensioning wheel shaft to move relative to each other, adjust the distance between the first tensioning wheel and the second tensioning wheel, so as to adjust the size of the first conveying gap.

5. The lettuce harvesting device according to claim 4, characterized in that: The body of the first slot hole extends in a vertical direction, the body of the second slot hole extends in a vertical direction, the adjustment plate is further provided with a first hinge hole, the first hinge hole is arranged between the first slot hole and the second slot hole, and the adjustment assembly further comprises: The third connecting rod is hinged to the adjustment plate at the first hinge hole. The third connecting rod is also provided with a first connecting hole and a second connecting hole. The first connecting hole and the second connecting hole are symmetrically arranged with the hinge axis of the third connecting rod as the center. The first connecting rod and the third connecting rod are connected to the first connecting hole, and the second connecting rod and the third connecting rod are connected to the second connecting hole.

6. The lettuce harvesting device according to claim 5, characterized in that: The third connecting rod has a first extending end, the first extending end is arranged at the side where the first connecting hole is located, and a first adjusting hole is provided on the first extending end; The adjustment component also includes: A first elastic member, one end of the first elastic member is connected to the frame, the other end of the first elastic member and the first extension end are connected to the first adjustment hole, and the first elastic member is used to adjust the rotation angle of the third connecting rod relative to the adjustment plate.

7. The lettuce harvesting device according to claim 6, characterized in that: The number of the adjustment components is two, which are symmetrically arranged on both sides of the first tensioning wheel shaft.

8. The lettuce harvesting device according to claim 7, characterized in that: The number of the first tensioning wheels is three, and they are arranged in sequence and at intervals along the conveying direction of the first conveyor belt; The number of the second tensioning wheels is three, and they are arranged in sequence and at intervals along the conveying direction of the second conveyor belt.

9. The lettuce harvesting device according to claim 1, characterized in that: The leaf cutting assembly comprises: A fixing ring, wherein the center of the fixing ring has the blade cutting opening; An elastic component, the elastic component comprising a first connecting plate, a second connecting plate and a second elastic member, two ends of the second elastic member are connected to the first connecting plate and the second connecting plate respectively, the first connecting plate is arranged on the inner side wall of the fixing ring, and the first connecting plate, the second elastic member and the second connecting plate are sequentially distributed along the edge of the fixing ring toward the center point of the fixing ring; a first guide shaft connected to the second connecting plate, the first guide shaft comprising a first suspended end, the first suspended end protruding out of the second connecting plate toward the center point of the fixing ring; The leaf cutter blade comprises a first fixing portion and a first cutting portion, wherein the first fixing portion is connected to the first suspended end, the first cutting portion and the first fixing portion are arranged at a preset angle, and the first cutting portion has a blade.

10. The lettuce harvesting device according to claim 1, characterized in that: Also includes: A first output roller shaft is arranged on the frame, wherein the first output roller shaft is arranged on a side of the leaf cutting opening away from the first conveying gap; A second output roller is arranged on the frame, and the second output roller is arranged opposite to the first output roller to form a second conveying gap, and the second conveying gap is used to output the lettuce.

Images