Handheld tobacco topping machine

Abstract

The present invention discloses a handheld tobacco topping machine, which comprises a machine base; the machine base is equipped with cutting knives arranged in pairs and clamping rods arranged in pairs, and also comprises a driving mechanism for driving the paired cutting knives to perform opening and closing movements, and the opening and closing movements between the paired clamping rods are also driven by the driving mechanism; in the open state, the opening amount of the paired cutting knives is greater than the opening amount of the paired clamping rods; in the closed state, the opening amount of the paired cutting knives is less than the opening amount of the paired clamping rods. In the present invention, the cutting knives and the clamping rods are driven by the same driving mechanism, and by setting the relationship between the opening amount of the paired cutting knives and the paired clamping rods in the open state and the closed state, it can be achieved that in the topping process, the tops of the tobacco plants are first gathered, and then the tops of the tobacco plants are fully cut, so as to achieve a stable topping effect, and the topping machine has a compact and small overall structure, light weight, convenient handheld operation, and good portability.

Description

Technical Field

[0001] The invention relates to the technical field of agricultural machinery, in particular to a handheld tobacco topping machine. Background Art

[0002] Plant topping is an important step in the tobacco planting process. By topping the tobacco plants, the apical dominance of the plants can be eliminated, the growth of lateral buds can be promoted, and the plant shape can be made denser. At the same time, it can promote branch expansion and prevent lodging caused by vigorous growth.

[0003] The handheld topping machine is convenient and easy to use, and can be used for topping operations in smaller-scale tobacco planting processes. The existing handheld topping machine has a relatively simple structure. For example, patent CN106171569A discloses a portable topping and bud suppression machine and a control method thereof, which has a fixed blade and a movable blade, and the topping operation is performed by driving the movable blade to open and close relative to the fixed blade. This topping machine can cut off fewer plant tops in one closing, has low efficiency, and is difficult to complete the topping operation when the plant tops shake in windy weather.

[0004] Patent CN107360879A discloses a handheld rotary cutting topping machine, which guides the plant to the cutting position through fixed plant guides 13 and 14. Patent CN213245818U discloses a clamping type tobacco topping machine, which clamps the top of the tobacco through a clamping channel formed between two opposing conveyor belts to feed the top of the tobacco into the cutting mechanism. This structure is relatively large in size, which will significantly increase the volume and weight of the topping machine.

[0005] Patent CN216254106U discloses a clamping-friendly cotton topping machine, which has a first clamping arm, a second clamping arm and a cutting blade, wherein the two clamping arms are driven by an umbrella-shaped structure driving mechanism to open and close the cutting blade, and the cutting blade is driven by a separate motor to move relative to a slide rail to perform cutting operations. The patent solution has a complex structure and a large volume, and the clamping arm and the cutting blade are driven by independent power sources, which is costly and not conducive to the endurance of the machine. Summary of the invention

[0006] Purpose of the invention: In order to overcome the deficiencies in the prior art, the present invention provides a handheld tobacco topping machine with a compact structure and good topping effect.

[0007] Technical solution: To achieve the above-mentioned purpose, the handheld tobacco topping machine of the present invention comprises a machine base; the machine base is equipped with a pair of cutting knives and a pair of clamping rods, and also comprises a driving mechanism for driving the pair of cutting knives to perform opening and closing movements; the opening and closing movements between the pair of clamping rods are also driven by the driving mechanism;

[0008] In the open state, the opening amount of the pair of cutting knives is greater than the opening amount of the pair of clamping rods; in the closed state, the opening amount of the pair of cutting knives is less than the opening amount of the pair of clamping rods.

[0009] Furthermore, the cutting knife and the clamping rod are both rotatably mounted relative to the machine base, and the opening amount is an opening angle.

[0010] Further, the driving mechanism includes a driving unit that performs translational motion;

[0011] A first driving rod and a second driving rod are fixed to the cutting blade and the clamping rod, respectively, and the first driving rod and the second driving rod are provided with a first pin and a second pin, respectively;

[0012] The driving unit is formed with a first groove and a second groove corresponding to the first pin and the second pin;

[0013] The first groove and the second groove have different shapes and / or extending directions.

[0014] Furthermore, the first groove is a straight groove; and the second groove is an arc groove.

[0015] Further, the driving unit includes two driving plates, a first driving plate and a second driving plate, and the first groove and the second groove are formed on the first driving plate and the second driving plate respectively;

[0016] The driving mechanism further comprises a fixing seat which is placed between the two driving plates and fixed relative to the machine base; a guiding structure is arranged between the fixing seat and each driving plate.

[0017] Furthermore, the first driving plate is driven to operate by an active actuator or a passive mechanism;

[0018] The active actuator is a linear motor or a hydraulic cylinder;

[0019] The passive mechanism includes a pull wire connected to the driving unit, and the pull wire is connected to the operating unit.

[0020] Furthermore, when in use, the clamping rod is installed above the cutting knife.

[0021] Furthermore, a plurality of pairs of the clamping rods are mounted on the machine base; each of the clamping rods has an upward extension section extending outward from the connection position between the clamping rods and the machine base, and the free ends of the clamping rods belonging to different pairs extend to different heights;

[0022] The free end of the clamping rod has an inwardly bent retracted portion.

[0023] Furthermore, the root material of the clamping rod is spring steel, and the end material of the clamping rod is rubber.

[0024] Furthermore, a medicine coating box is installed on the lower side of the cutting knife, and a medicine storage tank for supplying medicine to the medicine coating box is provided on the machine base.

[0025] Beneficial effects: The handheld tobacco topping machine of the present invention, the cutting knife and the clamping rod are driven by the same driving mechanism, and by setting the relationship between the opening amount of the paired cutting knives and the paired clamping rods in the open state and the closed state, it is possible to gather the tops of the tobacco plants first and then fully cut the tops of the tobacco plants during the topping process to achieve a stable topping effect. The overall structure of the topping machine is compact and light, light in weight, convenient for handheld operation, and has good portability. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a three-dimensional structural diagram of a handheld tobacco topping machine;

[0027] Figure 2 It is a side view of the structure of a handheld tobacco topping machine;

[0028] Figure 3 It is a top view of the structure of a handheld tobacco topping machine without a machine base;

[0029] Figure 4 is a structural diagram of the first driving board;

[0030] Figure 5 It is a bottom-up structural diagram of a handheld tobacco topping machine without a machine base;

[0031] Figure 6 is a structural diagram of the second driving board;

[0032] Figure 7 It is a structural diagram of the first changing state during the closing process of the handheld tobacco topping machine;

[0033] Figure 8 It is a structural diagram of the second changing state during the closing process of the handheld tobacco topping machine;

[0034] Fig. 9 It is a structural diagram of a handheld tobacco topping machine in a closed state;

[0035] Fig.10 The figure is a structural diagram of a handheld tobacco topping machine driven by a passive mechanism.

[0036] In the figure: 1-machine base; 11-holding handle; 2-cutting knife; 21-first driving rod; 22-first pin; 3-driving mechanism; 31-first driving plate; 311-first guide groove; 3a-first groove; 32-second driving plate; 321-second guide groove; 3b-second groove; 33-fixed seat; 331-guide pin; 34-active actuator; 36-operating unit; 37-reset spring; 38-button; 4-clamping rod; 41-second driving rod; 42-second pin; 51-medicine application box; 511-box body; 512-medicine application unit; 52-medicine storage tank. DETAILED DESCRIPTION

[0037] The present invention will be further described below in conjunction with the accompanying drawings.

[0038] like Figure 1-2 The handheld tobacco topping machine shown in the figure comprises a machine base 1, on which there is a gripping handle 11; the machine base 1 is equipped with a pair of cutting knives 2, which can be rotatably connected or slidably connected relative to the machine base 1, and also comprises a driving mechanism 3 for driving the pair of cutting knives 2 to open and close; the machine base 1 is also equipped with a pair of clamping rods 4, which can be rotatably connected or slidably connected relative to the machine base 1, and the opening and closing movement between the pair of clamping rods 4 is also driven by the driving mechanism 3; the cutting knives 2 are opened and closed synchronously with the clamping rods 4; Figure 3 As shown, in the open state, the opening amount of the pair of cutting knives 2 is greater than the opening amount of the pair of clamping rods 4; Fig. 9 As shown, in the closed state, the opening amount of the pair of cutting knives 2 is smaller than the opening amount of the pair of clamping rods 4.

[0039] Here, the opening amount is determined according to the installation method of the cutting knife 2 and the clamping rod 4 relative to the machine base 1. When the cutting knife 2 or the clamping rod 4 is installed in a sliding manner relative to the machine base 1, the opening amount is the distance between the two cutting knives 2; when the cutting knife 2 or the clamping rod 4 is installed in a rotational manner relative to the machine base 1, the opening amount is the angle between the two cutting knives 2.

[0040] In this embodiment, the cutting blade 2 and the clamping rod 4 are both rotatably mounted relative to the base 1, and the opening amount is the opening angle.

[0041] Preferably, if Figure 3 , 5As shown, the driving mechanism 3 includes a driving unit that performs translational motion; a first driving rod 21 and a second driving rod 41 are fixed to the cutting knife 2 and the clamping rod 4, respectively, and the first driving rod 21 and the second driving rod 41 are provided with a first pin 22 and a second pin 42, respectively; a first groove 3a and a second groove 3b corresponding to the first pin 22 and the second pin 42 are formed on the driving unit, and the first groove 3a and the second groove 3b are respectively provided in pairs; the first groove 3a and the second groove 3b have different shapes and / or extension directions.

[0042] like Figure 4 As shown, the first slot 3a is a straight slot, and its extension direction is perpendicular to the translation direction of the driving unit; Figure 6 As shown, the second slot 3b is an arc slot, and its two ends are staggered in the translation direction of the driving unit. With the symmetric center line of the second slots 3b arranged in pairs as a reference, the end of the second slot 3b close to the clamping rod 4 is closer to the symmetric center line, and the end of the second slot 3b far from the clamping rod 4 is far from the symmetric center line. In addition, among any two points on the extended arc of the second slot 3b, the inclination of the tangent at the point close to the symmetric center line relative to the first slot 3a is less than the inclination of the tangent at the point far from the symmetric center line relative to the first slot 3a. In this way, the clamping rod 4 can move faster in the early stage and slower in the later stage. The first slot 3a and the second slot 3b can be integrally formed on the same driving plate, or formed on different driving plates that move synchronously. In this embodiment, the driving unit includes two driving plates, a first driving plate 31 and a second driving plate 32, and the first groove 3a and the second groove 3b are respectively formed on the first driving plate 31 and the second driving plate 32; the driving mechanism 3 also includes a fixed seat 33 placed between the two driving plates and fixed relative to the machine base 1; a guide structure is arranged between the fixed seat 33 and each of the driving plates. In this embodiment, the guide structure includes two guide pins 331 installed for each driving plate, and the first driving plate 31 and the second driving plate 32 are respectively formed with a first guide groove 311 and a second guide groove 321 for the guide pin 331 to move therein.

[0043] By adopting the above structure, since the extension shapes of the first groove 3a and the second groove 3b are different, when the driving unit is translated to different positions, the angles between the cutting blade 2 and the clamping rod 4 relative to the machine base 1 are different, thereby achieving the purpose of different opening and closing changes of the cutting blade 2 and the clamping rod 4.

[0044] In the above structure, the cutting knife 2 and the clamping rod 4 are driven by the driving mechanism 3 to perform synchronous opening and closing movements. Since the opening amount of the cutting knife 2 varies greatly, the average movement speed of the cutting knife 2 is greater than the average movement speed of the clamping rod 4 during the process from the open state to the closed state. In the open state, since the opening amount of the cutting knife 2 is greater, the tip of the cutting knife 2 does not enter the space between the paired clamping rods 4 (part of the blade on the rear side of the blade may be placed in the space between the paired clamping rods 4), and will not cause obstacles when the top of the tobacco enters between the clamping rods 4. In the process of switching from the open state to the closed state, the opening amount between the clamping rods 4 is reduced, and the gathering operation of the top of the tobacco can be completed. In the later stage of the closing movement of the clamping rod 4, its movement speed slows down, and its function gradually changes from the function of gathering the top of the tobacco to the function of clamping the gathered top of the tobacco. The cutting knife 2 moves faster, and its entire blade gradually enters between the paired clamping rods 4 and acts on the tobacco therebetween to cut the top of the tobacco, thereby achieving topping. Since the opening amount of the cutting knife 2 is small in the closed state, the cutting knife 2 can fully cut the crops in the space between the pair of clamping bars 4 .

[0045] like Figure 7-8 As shown, in the first half of the relative closure of the pair of clamping rods 4, the tip of the cutting knife 2 still does not enter the space between the pair of clamping rods 4, and this process mainly completes the gathering operation of the top of the crop; in the second half of the relative closure of the pair of clamping rods 4, the tip of the cutting knife 2 gradually enters the space between the pair of clamping rods 4 to perform the shearing operation.

[0046] In addition, the cutting blade 2 and the clamping rod 4 are both synchronously driven to open and close by the driving mechanism 3, and do not need to be driven separately, which is convenient to operate and saves costs.

[0047] Preferably, the first driving plate 31 is driven by an active actuator 34 or a passive mechanism; Figure 3 As shown, the active actuator 34 is a linear motor or a hydraulic cylinder, and a button 38 for controlling the operation of the active actuator 34 is installed on the machine base 1;

[0048] like Fig.10 As shown, the passive mechanism includes a pull wire connected to the drive unit, and the pull wire is connected to the operating unit 36. The user applies a force to the operating unit 36 ​​to move the first drive plate 31 through the pull wire to perform a topping operation. This embodiment is suitable for situations where the force required for topping is small. In addition, a reset spring 37 can be set between the first drive plate 31 and the base 1. After the user releases the operating unit 36, the reset spring 37 resets the first drive plate 31 to return the cutting knife 2 and the clamping rod 4 to the open state.

[0049] Preferably, when in use, the clamping rod 4 is installed above the cutting knife 2. In this way, the portion of the tobacco clamped by the clamping rod 4 will be cut off by the cutting knife 2, and there will be no situation where the tobacco is injured by the clamping rod 4 after topping.

[0050] Preferably, if Figure 1-2 As shown, a plurality of pairs of clamping rods 4 are installed on the machine base 1; each of the clamping rods 4 has an upward extension section extending outward from the connection position with the machine base 1, and the free ends of the clamping rods 4 belonging to different pairs extend to different heights, so that on the one hand, the machine base 1 can be made small and compact as a whole, and on the other hand, the arrangement of a plurality of pairs of clamping rods 4 can keep the top of the tobacco being gathered and clamped vertically without being skewed, thereby ensuring the topping quality; in addition, the free ends of the clamping rods 4 have an inwardly bent retracted portion, so that a better gathering effect can be achieved.

[0051] Preferably, the clamping rod 4 is made of a composite material, and the root material of the clamping rod 4 is spring steel, which has both strong rigidity and certain elasticity. At the same time, the end material of the clamping rod 4 is rubber, which has strong flexibility, can achieve tightening and prevent slipping. When clamped to a certain angle, it can ensure that the clamp does not fall off, and can effectively prevent the tobacco from being broken due to excessive clamping force.

[0052] Preferably, if Figure 1 As shown, a medicine coating box 51 is installed on the lower side of the cutting knife 2, and a medicine storage tank 52 for supplying medicine to the medicine coating box 51 is provided on the machine base 1. Figure 3 As shown, the medicine applying box 51 includes a box body 511, and the side of the box body 511 facing the cutting edge of the cutting knife 2 is an open side. A medicine applying unit 512 is installed in the box body 511. The medicine applying unit 512 is made of sponge or other soft water-absorbent materials. The medicine applying unit 512 has a part extending from the open side to the outside of the box body 511, and its edge is close to the cutting edge of the cutting knife 2. The medicine storage tank 52 is connected to the box body 511 through a pipeline (not shown in the figure) to supply medicine to the medicine applying unit 512. In the process of the cutting knife 2 cutting the top of the tobacco, the medicine applying unit 512 can simultaneously apply the medicine to the top of the retained part of the tobacco crop. In the process of applying the medicine, the medicine applying unit 512 can deform adaptively to increase the contact area with the tobacco crop. The box body 511 protects the medicine applying unit 512 to prevent the crop from scratching the medicine applying unit 512. The above-mentioned contact application method uses less medicine, which can effectively reduce waste and save medicine compared with traditional application methods such as spraying. The medicine storage tank 52 is detachably mounted relative to the base 1 , and when the medicine in the medicine storage tank 52 is used up, the user can replace it with a new medicine storage tank 52 .

[0053] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A handheld tobacco topping machine, comprising a machine base (1); the machine base (1) is equipped with a pair of cutting knives (2) and a pair of clamping rods (4), and also comprises a driving mechanism (3) for driving the pair of cutting knives (2) to perform opening and closing movements; characterized in that: The opening and closing movement between the paired clamping rods (4) is also driven by the driving mechanism (3); In the open state, the opening amount of the pair of cutting knives (2) is greater than the opening amount of the pair of clamping rods (4); in the closed state, the opening amount of the pair of cutting knives (2) is less than the opening amount of the pair of clamping rods (4); The cutting blade (2) and the clamping rod (4) are both rotatably mounted relative to the machine base (1), and the opening amount is an opening angle; The driving mechanism (3) comprises a driving unit that performs translational motion; A first driving rod (21) and a second driving rod (41) are fixed to the cutting knife (2) and the clamping rod (4), respectively; the first driving rod (21) and the second driving rod (41) are provided with a first pin (22) and a second pin (42), respectively; The driving unit is formed with a first groove (3a) and a second groove (3b) which are arranged corresponding to the first pin (22) and the second pin (42); The first groove (3a) and the second groove (3b) have different shapes and / or extension directions; The first groove (3a) is a straight groove; the second groove (3b) is an arc-shaped groove.

2. The handheld tobacco topping machine according to claim 1, characterized in that: The driving unit comprises two driving plates, a first driving plate (31) and a second driving plate (32), wherein the first groove (3a) and the second groove (3b) are respectively formed on the first driving plate (31) and the second driving plate (32); The driving mechanism (3) further comprises a fixing seat (33) disposed between the two driving plates and fixed relative to the machine base (1); a guiding structure is provided between the fixing seat (33) and each driving plate.

3. The handheld tobacco topping machine according to claim 2, characterized in that: The first driving plate (31) is driven to operate by an active actuator (34) or a passive mechanism; The active actuator (34) is a linear motor or a hydraulic cylinder; The passive mechanism comprises a pull wire connected to the drive unit, and the pull wire is connected to the operating unit (36).

4. The handheld tobacco topping machine according to claim 1, characterized in that: When in use, the clamping rod (4) is installed above the cutting knife (2).

5. The handheld tobacco topping machine according to claim 1, characterized in that: A plurality of pairs of clamping rods (4) are mounted on the machine base (1); each clamping rod (4) has an upwardly extending section extending outward from a connection position between the clamping rod (4) and the machine base (1), and free ends of the clamping rods (4) belonging to different pairs extend to different heights; The free end of the clamping rod (4) has an inwardly bent retracted portion.

6. The handheld tobacco topping machine according to claim 1, characterized in that: The root material of the clamping rod (4) is spring steel, and the end material of the clamping rod (4) is rubber.

7. The handheld tobacco topping machine according to claim 1, characterized in that: A medicine coating box (51) is installed on the lower side of the cutting knife (2), and a medicine storage tank (52) for supplying medicine to the medicine coating box (51) is provided on the machine base (1).

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