Auxiliary asparagus lettuce harvesting device

Abstract

The utility model provides an asparagus lettuce auxiliary harvesting device, which belongs to the technical field of crop auxiliary devices and comprises a rack, a clamping and up-pulling mechanism and a shearing mechanism. The machine frame comprises wheels, a wheel support and a wheel fixing plate, the wheels are installed on the wheel support, the wheel support is fixed to the lower portion of one side of the machine frame through the wheel fixing plate, and an opening is formed in the other side of the machine frame. The shearing mechanism is arranged in the middle of the side, provided with wheels, of the rack, the shearing mechanism is connected with the bottom end of the rack, the number of the clamping up-pulling mechanisms is two, and the two clamping up-pulling mechanisms are symmetrically arranged in the rack. The asparagus lettuce harvesting device solves the problems that an existing asparagus lettuce harvesting device is large in size, high in manufacturing cost, complex in mechanical structure and not suitable for being used in most families and small-sized planting fields, and is small in size, convenient to use, low in cost and more suitable for being used in small-sized fields.

Description

Technical Field

[0001] The utility model relates to the technical field of crop auxiliary devices, in particular to a lettuce auxiliary harvesting device. Background Art

[0002] The existing lettuce harvesting equipment solves the problem of manual harvesting of lettuce, which is time-consuming, labor-intensive and labor-intensive. However, the lettuce harvesting equipment is bulky, expensive, and has a complex mechanical structure. It is only suitable for harvesting on large farms. It is too expensive for most families and small-scale planting areas, and it is not convenient to use. Therefore, it is necessary to design and develop a lettuce harvesting equipment that is small in size, easy to use, simple in structure, and low in cost. Summary of the invention

[0003] The purpose of the utility model is to provide a lettuce auxiliary harvesting device, which solves the problem that the existing lettuce harvesting device is large in size, high in cost, and has a complex mechanical structure and is not suitable for use in most households and small-scale planting fields. The device is small in size, convenient, and low in cost, and is more suitable for use in small-scale fields.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A lettuce auxiliary harvesting device, characterized in that:

[0006] It includes a frame, a clamping and pulling mechanism and a shearing mechanism.

[0007] The frame comprises a wheel, a wheel bracket and a wheel fixing plate, the wheel is mounted on the wheel bracket, the wheel bracket is fixed to the lower part of one side of the frame through the wheel fixing plate, and an opening is arranged on the other side of the frame.

[0008] The shearing mechanism is arranged in the middle of the side of the frame with the wheel, and the shearing mechanism is connected to the bottom end of the frame. The number of the clamping and pulling mechanisms is two, and the two clamping and pulling mechanisms are symmetrically arranged inside the frame.

[0009] Furthermore, the clamping and pulling mechanism includes a handle, a limit block, a square tube, a capillary, a rubber pad, a connecting rod, a first spring plug, a single-head screw, a compression spring, a hexagonal nut, a cover nut, a second spring plug and a clamping claw sheet metal.

[0010] The handle is connected to one end of the top of the square tube, and the limit block is inserted into the top of the square tube.

[0011] The tops of the two connecting rods are connected to the two sides of the other end of the square tube, the outer sides of the bottoms of the two connecting rods are connected to two square tubes, a capillary is arranged between the bottoms of the two connecting rods, and the outer sides of the bottoms of the two square tubes connected to the bottoms of the connecting rods are fixedly connected to rubber pads.

[0012] The first spring plug is fixed between two square tubes arranged on one side of the limit block to form a rotating pair, a single-head screw is inserted at the center of the first spring plug, the single-head screw is connected to the second spring plug, and a compression spring is arranged between the first spring plug and the second spring plug.

[0013] The single-head screw is equipped with a hexagonal nut and a cover nut, a clamping claw sheet metal is clamped between the hexagonal nut and the cover nut, and the clamping claw sheet metal is connected to the square tube with a rubber pad part to form a rotating pair, the single-head bolt and the second spring plug are relatively fixed, and a moving pair is formed between the single-head bolt and the first spring plug.

[0014] Furthermore, the shearing mechanism includes a cushion block, a tool holder, a tension spring and a blade. The two tool holders are installed in parallel at the lower part of the frame. The cushion block is arranged between the two tool holders. The two ends of the blade are inserted into the grooves of the tool holder. The rear end of the blade is symmetrically provided with two small holes.

[0015] One end of the tension spring is fixed to the blade through a small hole, and the other end is fixed to the tool holder. The two tension springs are symmetrically arranged, and the cushion block is fixed to the blade through bolts.

[0016] Furthermore, the groove is arranged obliquely.

[0017] Furthermore, the inclination angle of the groove to the horizontal plane is 30°.

[0018] Furthermore, the shape of the blade is an isosceles trapezoid.

[0019] Furthermore, the wheel bracket is a sheet metal part.

[0020] Advantages of the utility model:

[0021] 1. The structure of the device is free and flexible, and has a wide range of applications. By adjusting the structure of the frame, it can adapt to different lettuce diameters and achieve different pulling heights. The wheel assistance can adapt to different working environments. According to the usage habits and heights of different users, the handle position of the clamping and pulling mechanism can also be adjusted to a suitable position.

[0022] 2. This device utilizes the mechanical self-adaptation of the rubber pad to achieve clamping and pulling at the same time, and even the clamping will become tighter and tighter during the pulling process, achieving a labor-saving effect.

[0023] 3. The device is inexpensive. For the rods that only bear tensile force, resin plates with sufficient strength are used instead. On the one hand, it is easy to disassemble and assemble the device to adapt to different usage conditions, and on the other hand, it reduces the cost of the device. At the same time, it also reduces the overall weight of the device, making it more suitable for single-person use. The manufacturing cost of this device is about 200 yuan, which is low and can meet the needs of the public.

[0024] 4. This device is a purely mechanical device, green and environmentally friendly; it adopts a low-energy design, is easy to maintain and upgrade, and the materials are easily available. The device can be disassembled after being scrapped, and the various components and materials can be recycled and reused, adopting the principle of circular economy. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0026] Figure 2 This is a schematic diagram of the frame structure of the utility model;

[0027] Figure 3 It is a structural schematic diagram of the clamping and pulling mechanism of the utility model;

[0028] Figure 4 It is a partial schematic diagram of the clamping and pulling mechanism of the utility model;

[0029] Figure 5 It is a structural schematic diagram of the shearing mechanism of the utility model;

[0030] Figure 6 It is a partial schematic diagram of the shearing mechanism of the utility model;

[0031] Figure 7 It is a schematic diagram of the mechanism of the single-side clamping and pulling mechanism of the utility model when it is stationary;

[0032] Figure 8 It is a schematic diagram of the mechanism of the single-side clamping and pulling mechanism of the utility model when it is working;

[0033] In the figure: 1, frame, 1-1, 2028 angle code, 1-2, 2020 aluminum profile, 1-3, wheel, 1-4, wheel bracket, 1-5, wheel fixing plate;

[0034] 2. Clamping and pulling mechanism, 2-1. Handle, 2-2. Limit block, 2-3. Square tube, 2-4. Capillary tube, 2-5. Rubber pad, 2-6. Connecting rod, 2-7. First spring plug, 2-8. Single-head screw, 2-9. Compression spring, 2-10. Hexagonal nut, 2-11. Cover nut, 2-12. Second spring plug, 2-13. Clamping claw sheet metal;

[0035] 3. Shearing mechanism, 3-1. Spacer block, 3-2. Blade holder, 3-3. Tension spring, 3-4. Blade;

[0036] 4. Single-sided mechanism, 4-1. First rod, 4-2. Second rod, 4-3. Third rod, 4-4. Fourth rod, 4-5. Fifth rod. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the utility model for which protection is claimed, but merely represents selected embodiments of the utility model.

[0038] like Figure 1 and Figure 2 As shown, a lettuce auxiliary harvesting device includes a frame 1, a clamping and pulling mechanism 2 and a shearing mechanism 3. The frame 1 includes a 2028 angle code 1-1, a 2020 aluminum profile 1-2, a wheel 1-3, a wheel bracket 1-4 and a wheel fixing plate 1-5. The overall outline of the frame 1 is formed by 15 2020 aluminum profiles 1-2 connected by a 2028 angle code 1-1. The wheel 1-3 is installed on the wheel bracket 1-4. The wheel bracket 1-4 is fixed to the lower part of one side of the frame 1 through the wheel fixing plate 1-5. The other side of the frame 1 is provided with an opening.

[0039] The profile position of the frame 1 can be adjusted according to the needs, so that the overall application range of the device is wider, and the wheels 1-3 are vertically installed on both sides of the frame 1, so that the wheels 1-3 will not affect the harvesting work during operation. An opening is left at the end of the bottom of the frame 1 where the shearing mechanism 3 is not installed. When the device is used, the device can be pushed to make the lettuce enter the center position of the device, thereby realizing the subsequent harvesting function.

[0040] The shearing mechanism 3 is arranged in the middle of the side of the frame 1 with the wheel 1-3, and the shearing mechanism 3 is connected to the bottom end of the frame 1 through the 2028 angle code 1-1. The number of the clamping and pulling mechanisms 2 is two, and the two clamping and pulling mechanisms 2 are symmetrically arranged inside the frame 1. The clamping and pulling mechanisms 2 are connected to the frame 1 through the 2028 angle code 1-1.

[0041] like Figure 3 As shown, the clamping and pulling mechanism 2 includes a handle 2-1, a limit block 2-2, a square tube 2-3, a capillary 2-4, a rubber pad 2-5, a connecting rod 2-6, a first spring plug 2-7, a single-head screw 2-8, a compression spring 2-9, a hexagonal nut 2-10, a cover nut 2-11, a second spring plug 2-12 and a clamping claw sheet metal 2-13, the square tube 2-3 is an aluminum square tube, and the connecting rod 2-6 is a resin version connecting rod.

[0042] The main part of the clamping and pulling mechanism 2 is constructed by a square tube 2-3, the handle 2-1 is connected to one end of the top of the square tube 2-3, and the limit block 2-2 is inserted at the top of the square tube 2-3 to block the square tube 2-3 where the handle 2-1 is located, which can effectively make the prototype automatically reset to a suitable angle. The handle 2-1 uses a lever principle as a labor-saving mechanism.

[0043] The tops of the two connecting rods 2-6 are connected to the two sides of the other end of the square tube, and two square tubes are connected to the outer sides of the bottoms of the two connecting rods 2-6. A capillary tube 2-4 is provided between the bottoms of the two connecting rods 2-6. The capillary tube 2-4 enables the two connecting rods 2-6 to maintain a certain distance, and a rubber pad 2-5 is fixedly connected to the outer sides of the bottoms of the two square tubes connected to the bottoms of the connecting rods 2-6.

[0044] like Figure 4 As shown, the first spring plug 2-7 is fixed between two square tubes arranged on one side of the limit block 2-2 to form a rotating pair, a single-head screw 2-8 is inserted at the center of the first spring plug 2-7, and the single-head screw 2-8 is connected to the second spring plug 2-12, and a compression spring 2-9 is arranged between the first spring plug 2-7 and the second spring plug 2-12.

[0045] The single-head screw 2-8 is equipped with a hexagonal nut 2-10 and a cover nut 2-11, and a clamping claw sheet metal 2-13 is clamped between the hexagonal nut 2-10 and the cover nut 2-11. The single-head screw 2-8 and the clamping claw sheet metal 2-13 are fixed by tightening the hexagonal nut 2-10 and the cover nut 2-11 against each other. The clamping claw sheet metal 2-13 is connected to the square tube with the rubber pad 2-5 to form a rotating pair. The single-head bolt and the second spring plug 2-12 are relatively fixed, and a moving pair is formed between the single-head bolt and the first spring plug 2-7.

[0046] like Figure 5 and Figure 6 As shown, the shearing mechanism 3 includes a cushion block 3-1, a tool holder 3-2, a tension spring 3-3 and a blade 3-4. The two tool holders 3-2 are placed in parallel and installed at the lower part of the frame 1 through a 2028 angle code 1-1. The cushion block 3-1 is arranged between the two tool holders 3-2. Both ends of the blade 3-4 are inserted into the grooves of the tool holder 3-2. The rear end of the blade 3-4 is symmetrically provided with two small holes.

[0047] One end of the tension spring 3-3 is fixed to the blade 3-4 through a small hole, and the other end is fixed to the blade holder 3-2. The two tension springs 3-3 are symmetrically arranged. After the blade 3-4 moves down a certain distance along the groove, the elastic potential energy of the tension spring 3-3 is used to realize the automatic reset of the blade 3-4. The pad 3-1 is fixed to the blade 3-4 by bolts. When in use, the user can directly apply force to the blade 3-4 by stepping on the pad 3-1 with his foot, which provides sufficient force for cutting the lettuce.

[0048] As a preferred embodiment of the present utility model, the groove is arranged obliquely.

[0049] As a preferred embodiment of the utility model, the inclination angle of the groove to the horizontal plane is 30°. By adjusting the distance between the two tool holders 3-2, the blade 3-4 can slide smoothly on the groove and the blade 3-4 will not touch the groove during the sliding process.

[0050] As a preferred embodiment of the present invention, the shape of the blade 3-4 is an isosceles trapezoid, which can avoid the above-mentioned collision as much as possible.

[0051] As a preferred embodiment of the utility model, the wheel bracket 1-4 is a sheet metal part, which is not easy to modify after design, and the material of the wheel fixing plate 1-5 is 3240 epoxy plate, which is easy to modify and adjust, thereby improving the fault tolerance of installing the wheel 1-3.

[0052] By adjusting the installation position of the profile, the working distance between the rubber pads 2-5 at the lower ends of the clamping and pulling mechanisms 2 on both sides can be adjusted to adapt to different lettuce diameters, and the clamping and pulling mechanisms 2 can also be moved upward or downward relative to the frame 1 as a whole. The height of the pulled lettuce can be increased by adjusting the height, and it can also adapt to different working environments to ensure that the rubber pads 2-5 of the clamping and pulling mechanisms 2 will not touch the ground when they are in a stationary state. At the same time, the position of the handle 2-1 of the clamping and pulling mechanisms 2 can also be adjusted to a suitable position according to the usage habits and heights of different users.

[0053] Working principle of this device:

[0054] 1. Clamping and pulling principle: The clamping and pulling mechanism 2 of the lettuce auxiliary harvesting device designed in the utility model is designed based on the metamorphosis principle. Figure 7 As shown, it is a 6-bar mechanism, the frame 1 is not marked in the figure, the bar 4-1 corresponds to the square tube 2-3 where the handle 2-1 is located, the bar 4-2 corresponds to the connecting rod 2-6, the bar 4-3 corresponds to the square tube 2-3 where the rubber pad 2-5 is located, the bar 4-4 corresponds to the single-head bolt and the clamping claw sheet metal 2-13, and the bar 4-5 corresponds to the first spring plug 2-7. First, calculate the degree of freedom when the device is in a stationary state, and get it from the calculation formula of the degree of freedom of the planar mechanism:

[0055]

[0056] It can be seen that the degree of freedom of the device is 3. When the user presses the handle 2-1 downward and the rubber pad 2-5 contacts the surface of the lettuce, the schematic diagram of the mechanism at this time is as follows Figure 8 As shown, due to the interaction between the clamping and pulling mechanisms 2 on both sides in the horizontal direction, there is no obvious deformation on the surface of the lettuce. It is approximately assumed that the rod 4-3 will not be displaced in the horizontal direction, so a vertical upward motion pair is formed at the rod 4-3. At this time, the degree of freedom of the device is calculated, and the degree of freedom calculation formula of the planar mechanism is obtained:

[0057]

[0058] It can be seen that the degree of freedom of the device is 1 at this time, and the degree of freedom has changed. By applying force to the lettuce, the degree of freedom of the lettuce is passively changed. At this time, if the rods 4-4 and 4-5 are removed in the schematic diagram, it will not affect the movement of the rod 4-3. The degree of freedom of the device is still 1, and the number of rods will also be reduced. This is the application of the metamorphosis principle in the clamping and pulling mechanism 2. Traditionally, when harvesting lettuce, it is necessary to apply force upward. The lettuce auxiliary harvesting device designed by the utility model, when the user presses down the handles 2-1 on both sides at the same time, with the help of the lever principle, it can save effort while applying force downward. With the help of ergonomic principles, the user can complete the work of pulling the lettuce in a more comfortable way.

[0059] 2. Shearing principle: The lettuce auxiliary harvesting device designed by the utility model is designed such that the user steps on the pad 3-1, and the force is directly applied to the blade 3-4, so that the force direction of the foot is the same as the cutting direction of the blade 3-4, and the cutting work of the lettuce root is efficiently achieved while minimizing the loss of force. After the foot stops applying force to the pad 3-1, the tension spring 3-3 will use the elastic potential energy stored before to bring the blade 3-4 back to the initial position.

[0060] The specific operation mode of this device:

[0061] When the device is working in the field, the device is first tilted as a whole so that the wheels 1-3 are in contact with the ground. The user pushes the device to the vicinity of the lettuce to be harvested, and the device is placed vertically so that the lettuce enters the central area of ​​the device from the front of the device. The user presses the handles 2-1 on both sides of the device downward with both hands at the same time, and the square tube 2-3 where the handle 2-1 is located drives the square tube 2-3 where the rubber pad 2-5 is located to move upward through the connecting rod 2-6. The rubber pads 2-5 on both sides move upward at the same time and contact the surface of the lettuce at the same time. Due to the effect of the spring, the rubber pad 2-5 continuously clamps the lettuce during the rising process, and at the same time, it will give the lettuce surface upward friction. Since the deformation of the compression spring 2-9 is constantly increasing when the rubber pad 2-5 is rising, the pressure of the rubber pad 2-5 on the surface of the lettuce is constantly increasing, and the friction is also constantly increasing, so that the lettuce is pulled up. After the part of the lettuce below the ground is pulled out, the user steps on the pad 3-1 with his foot while keeping the angle of the handle 2-1, and the blade 3-4 moves downward 30 degrees along the groove of the blade holder 3-2 to quickly cut off the root of the lettuce. After the root of the lettuce is cut off, the lettuce can be harvested. Repeat the above steps to achieve continuous harvesting of lettuce.

[0062] The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Those skilled in the art can still adjust the technical solutions recorded in the above embodiments, or replace some of the technical features by equivalents. Therefore, if these modifications and variations of the utility model fall within the scope of the claims of the utility model and their equivalent technologies, the utility model is also intended to include these modifications and variations.

Claims

1. A lettuce auxiliary harvesting device, characterized in that: It comprises a frame (1), a clamping and pulling mechanism (2) and a shearing mechanism (3); The frame (1) comprises a wheel (1-3), a wheel bracket (1-4) and a wheel fixing plate (1-5); the wheel (1-3) is mounted on the wheel bracket (1-4); the wheel bracket (1-4) is fixed to the lower part of one side of the frame (1) via the wheel fixing plate (1-5); and an opening is provided on the other side of the frame (1); The shearing mechanism (3) is arranged in the middle of the side of the frame (1) with the wheel (1-3), and the shearing mechanism (3) is connected to the bottom end of the frame (1). The number of the clamping and pulling mechanisms (2) is two, and the two clamping and pulling mechanisms (2) are symmetrically arranged inside the frame (1).

2. The lettuce auxiliary harvesting device according to claim 1, characterized in that: The clamping and pulling mechanism (2) comprises a handle (2-1), a limit block (2-2), a square tube, a capillary tube (2-4), a rubber pad (2-5), a connecting rod (2-6), a first spring plug (2-7), a single-head screw (2-8), a compression spring (2-9), a hexagonal nut (2-10), a cover nut (2-11), a second spring plug (2-12) and a clamping claw sheet metal (2-13); The handle (2-1) is connected to one end of the top of the square tube, and the limit block (2-2) is inserted into the top of the square tube; The tops of the two connecting rods (2-6) are connected to the two sides of the other end of the square tube, the outer sides of the bottoms of the two connecting rods (2-6) are connected to two square tubes, a capillary tube (2-4) is provided between the bottoms of the two connecting rods (2-6), and the outer sides of the bottoms of the two square tubes connected to the bottoms of the connecting rods (2-6) are fixedly connected to a rubber pad (2-5); The first spring plug (2-7) is fixed between two square tubes arranged on one side of the limit block (2-2) to form a rotation pair, a single-head screw (2-8) is inserted at the center of the first spring plug (2-7), the single-head screw (2-8) is connected to the second spring plug (2-12), and a compression spring (2-9) is arranged between the first spring plug (2-7) and the second spring plug (2-12); The single-head screw (2-8) is provided with a hexagonal nut (2-10) and a cover nut (2-11); a clamping claw sheet metal (2-13) is sandwiched between the hexagonal nut (2-10) and the cover nut (2-11); the clamping claw sheet metal (2-13) is connected to a square tube provided with a rubber pad (2-5) to form a rotating pair; the single-head bolt and the second spring plug (2-12) are relatively fixed; and a moving pair is formed between the single-head bolt and the first spring plug (2-7).

3. The lettuce auxiliary harvesting device according to claim 1, characterized in that: The shearing mechanism (3) comprises a cushion block (3-1), a knife holder (3-2), a tension spring (3-3) and a blade (3-4); the two knife holders (3-2) are installed in parallel at the lower part of the frame (1); the cushion block (3-1) is arranged between the two knife holders (3-2); the two ends of the blade (3-4) are inserted into the grooves of the knife holder (3-2); and the rear end of the blade (3-4) is symmetrically provided with two small holes; One end of the tension spring (3-3) is fixed to the blade (3-4) through a small hole, and the other end is fixed to the blade holder (3-2); the two tension springs (3-3) are symmetrically arranged, and the cushion block (3-1) and the blade (3-4) are fixed by bolts.

4. The lettuce auxiliary harvesting device according to claim 3, characterized in that: The groove is arranged obliquely.

5. The lettuce auxiliary harvesting device according to claim 4, characterized in that: The inclination angle of the groove to the horizontal plane is 30°.

6. The lettuce auxiliary harvesting device according to claim 5, characterized in that: The shape of the blade (3-4) is an isosceles trapezoid.

7. The lettuce auxiliary harvesting device according to claim 1, characterized in that: The wheel bracket (1-4) is a sheet metal part.

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