Sweet potato seedling rope binding and bundling machine and rope binding and bundling method

Abstract

The present application relates to a kind of sweet potato seedling braiding rope bundling machine and braiding rope bundling method, wherein a kind of sweet potato seedling braiding rope bundling machine includes rack and the sweet potato seedling conveying device and sweet potato seedling braiding rope bundling device installed on rack, sweet potato seedling conveying device uses two annular conveying chains, annular conveying chain outside is equipped with a plurality of spacing arrangement sequentially along circumference and is arranged put seedling claw, for conveying the sweet potato seedling of pre-braiding rope;Sweet potato seedling braiding rope bundling device includes the braiding rope mechanism installed on rack, bundling mechanism, step motor II, and the control device for adjusting the rotational speed of step motor II, for completing sweet potato seedling braiding rope bundling action;The present application is installed with travel switch below sweet potato seedling conveying device, put seedling claw constantly touch travel switch when sweet potato seedling conveying device operates, realizes the automatic counting of braiding rope sweet potato seedling by the signal change in single-chip microcomputer acquisition circuit, and braiding efficiency is high, while reducing labor intensity.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of crop transplanting machinery, especially to the field of sweet potato seedling transplanting, in particular to a sweet potato seedling rope binding and bundling machine and a rope binding and bundling method. BACKGROUND

[0002] Sweet potato is a kind of food crop with rich nutrition, wide application and high and stable yield. The planting area and total yield of sweet potato in China rank first in the world. However, the current sweet potato mechanical planting mainly relies on manual seedling arrangement. The sweet potato seedlings have large differences in morphology, and the branches and leaves are easy to entangle, resulting in low efficiency, unstable quality and high labor intensity of manual seedling arrangement.

[0003] Therefore, it is an urgent problem to be solved to realize automatic rope binding of sweet potato seedlings that meet the agronomic requirements of sweet potato planting, so as to improve the efficiency of sweet potato mechanical planting.

[0004] A sweet potato automatic seedling machine is disclosed in Chinese patent No. 202110964367.5. In the scheme, a single adhesive tape is used to bundle the seedlings. However, during the conveying of the seedlings by the conveying belt, the seedlings are inevitably displaced due to factors such as vibration of the equipment, resulting in deviation of the seedlings and inconsistent spacing between the seedlings, which is not conducive to improving the efficiency and quality of subsequent planting. SUMMARY

[0005] The present application provides a sweet potato seedling rope binding and bundling machine and method, which can not only realize automatic rope binding and bundling of sweet potato seedlings, but also reduce the displacement of sweet potato seedlings during rope binding, which is conducive to improving the consistency of planting spacing.

[0006] The present application is realized by the following technical scheme, which provides a sweet potato seedling rope binding and bundling machine, comprising a rack, a seedling conveying device, a rope binding mechanism and a bundling mechanism installed on the rack, the bundling mechanism is located in front of the seedling conveying device, and the seedling conveying device conveys the sweet potato seedlings from back to front; the bundling mechanism comprises a seedling winding shaft rotatably connected with the rack and a seedling winding drive device driving the seedling winding shaft to rotate, the seedling winding drive device drives the seedling winding shaft to rotate, and the sweet potato seedlings after rope binding are wound on the seedling winding shaft, realizing bundling of the sweet potato seedlings; the rope binding mechanism comprises a lower adhesive tape roller, an upper adhesive tape roller and a pressing roller group rotatably arranged on the rack, and the pressing roller group is located between the seedling conveying device and the seedling winding shaft; the pressing roller group comprises an upper roller and a lower roller rotatably arranged on the rack, and a pressing channel is formed between the upper roller and the lower roller;

[0007] The lower adhesive tape roller is provided with an adhesive tape disc I, and the adhesive tape on the adhesive tape disc I is a lower adhesive tape with an adhesive surface facing upward. The movable end of the lower adhesive tape extends forward along the potato seedling support surface of the potato seedling conveying device and is wound on the seedling winding shaft after passing through the pressing channel, and the potato seedling on the potato seedling conveying device is located above the lower adhesive tape. The upper adhesive tape roller is provided with an adhesive tape disc II, and the adhesive tape on the adhesive tape disc II is an upper adhesive tape with an adhesive surface facing downward and opposite to the lower adhesive tape. The movable end of the upper adhesive tape is wound on the seedling winding shaft after passing through the pressing channel, and the potato seedling is located between the upper adhesive tape and the lower adhesive tape when passing through the pressing channel.

[0008] During use of the scheme, the lower adhesive tape at the potato seedling conveying device performs a certain degree of adhesion to the bottom of the potato seedling, effectively avoiding displacement of the potato seedling due to factors such as equipment vibration. When the potato seedling passes through the pressing channel, the upper adhesive tape and the lower adhesive tape are mutually adhered under the extrusion of the upper roller and the lower roller, and the potato seedling is fixed between the upper adhesive tape and the lower adhesive tape, avoiding inclination or falling off of the potato seedling when being wound on the seedling winding shaft.

[0009] As an optimization, the rack is rotatably connected with a protractor plate through a rotating shaft, the rotating shaft is parallel to the seedling winding shaft, the protractor plate extends to a side of the seedling winding shaft away from the potato seedling conveying device, and the protractor plate is further connected with the rack through a torsional spring. The torsional spring makes the end of the protractor plate away from the rotating shaft have a moving trend close to the seedling winding shaft. In this embodiment, the torsional spring is arranged to make the protractor plate have a trend of closely adhering to the seedling winding shaft. During winding of the potato seedling on the seedling winding shaft, the protractor plate always closely adheres to the outer lateral surface of the potato seedling, so that the seedling bundle wound on the seedling winding shaft is more compact, and the bundling quality is improved.

[0010] As an optimization, the protractor plate is fixedly connected with the rotating shaft, and an angle sensor connected with the rotating shaft is arranged on the rack. The angle sensor is used to detect the angle change of the protractor plate, and the radius change of the potato seedling bundle wound on the seedling winding shaft is obtained. Through the arrangement of the optimization scheme, when the potato seedling wound on the seedling winding shaft increases, the radius of the potato seedling bundle increases, so that the rotation angle of the protractor plate increases. Since the protractor plate rotates to drive the rotating shaft to rotate, the rotation angle of the protractor plate can be measured by the angle sensor, so that the radius change of the potato seedling bundle is obtained, and the winding amount of the potato seedling on the seedling winding shaft can be grasped.

[0011] As an optimization, the potato seedling conveying device comprises a ring-shaped conveying chain rotatably arranged on the rack, a conveying driving device for driving the ring-shaped conveying chain to rotate, and a plurality of seedling placing claws arranged on the outer lateral surface of the ring-shaped conveying chain and spaced apart along the circumference. The potato seedling conveying device of the optimization scheme uses the seedling placing claws to place the potato seedlings to be bundled, further avoids displacement of the potato seedlings, and ensures the spacing of the potato seedlings. The ring-shaped conveying chain drives the seedling placing claws to move, which is simple in structure, not easy to slip, and convenient for installation of the seedling placing claws.

[0012] As optimization, the seedling releasing claw comprises at least two bottom rods extending in left-right direction and fixed with the annular conveying chain, and a plurality of blocking rods extending upward from the bottom rods, each bottom rod is fixed with a support rod, and the lower adhesive tape passes between adjacent two blocking rods. The structure of the seedling releasing claw of the optimization scheme not only improves the structural strength, but also supports the potato seedlings through the support rod, and supports the lower adhesive tape through the bottom rod; the blocking rod not only plays a role of limiting the potato seedlings in front and back, but also plays a role of limiting the lower adhesive tape in left and right, and facilitates the cooperation of the lower adhesive tape with the annular conveying chain, thereby avoiding the mutual interference between the lower layer seedling releasing claw of the annular conveying chain and the lower adhesive tape when the seedling releasing claw moves to the upper layer.

[0013] As optimization, the machine frame is provided with a travel switch matched with the seedling releasing claw, and the number of potato seedlings conveyed by the potato seedling conveying device is counted by the number of times that the travel switch is touched by the seedling releasing claw. The setting of the optimization scheme can count the potato seedlings, thereby facilitating the grasping of the number of potato seedlings.

[0014] The scheme also provides a roping and bundling method of the potato seedling roping and bundling machine.

[0015] Step one: the movable end of the lower adhesive tape is pulled to make the lower adhesive tape pass around the guide wheel arranged on the machine frame, lay flat in the conveying direction, and pass between adjacent blocking rods of the upper layer seedling releasing claws of the annular conveying chain in sequence; the movable end of the upper adhesive tape is pulled to be wound on the seedling winding shaft after passing through the pressing channel of the pressing roller group with the lower adhesive tape.

[0016] Step two: the worker lays the pre-roped potato seedlings on the seedling releasing claws on the annular conveying chain, uses the rotation of the annular conveying chain to convey the potato seedlings to the pressing channel of the pressing roller, and makes the upper roller and the lower roller of the pressing roller press the upper adhesive tape, the lower adhesive tape and the potato seedlings, so that the potato seedlings are pasted on the adhesive tape to complete the roping action; the rotation of the seedling winding shaft is used to wind the roped potato seedlings on the seedling winding shaft to form a seedling bundle.

[0017] Step three: in the rotation process of the annular conveying chain, each seedling releasing claw touches the travel switch in sequence, the control device obtains the number of times that the travel switch is opened and closed, and the number of pre-roped potato seedlings conveyed by the annular conveying chain is calculated to realize the automatic counting of the roped potato seedlings.

[0018] The beneficial effects of the present application are:

[0019] 1. The automatic roping and bundling of the potato seedlings are realized, the work efficiency of the potato transplanting is improved, and the labor intensity of the potato production is reduced; the upper and lower double-sided adhesive tapes are used for roping, the fixing effect of the potato seedlings is improved, the displacement of the potato seedlings in the conveying and bundling process is avoided, and the spacing between the potato seedlings is ensured through the setting of the seedling releasing claw.

[0020] 2、Through angle sensor cooperation single-chip microcomputer controls the speed of bundling mechanism, makes the speed of bundling mechanism winding potato seedling consistent with the speed of potato seedling conveying device, guarantees the position of potato seedling in the seedling releasing claw is relatively fixed, the potato seedling after being roped is wound into a bundle by the bundling mechanism, and the finished product potato seedling bundle can be directly loaded on the machine for transplanting, and the planting spacing is also better guaranteed.

[0021] 3、The travel switch is installed below the potato seedling conveying device, the seedling releasing claw continuously touches the travel switch when the potato seedling conveying device operates, and the automatic counting of the roped potato seedling is realized through the signal change in the single-chip microcomputer acquisition circuit. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is the front view schematic diagram of the overall structure of the present application;

[0023] Figure 2 is the left view schematic diagram of the overall structure of the present application;

[0024] Figure 3 is the top view schematic diagram of the overall structure of the present application;

[0025] Figure 4 is the isometric schematic diagram of the overall structure of the present application;

[0026] Figure 5 is the structure schematic diagram of the potato seedling conveying device of the present application;

[0027] Figure 6 is the structure schematic diagram of the bundling mechanism of the present application.

[0028] In the drawings:

[0029] 1, rack, 2, chain wheel shaft, 3, adhesive tape reel I, 4, lower adhesive tape roller, 5, guide wheel, 6, conveying chain wheel, 7, potato seedling conveying device, 8, upper adhesive tape roller, 9, adhesive tape reel II, 10, potato seedling roping and bundling device, 11, seedling winding shaft, 12, second driven chain wheel, 13, second transmission chain, 14, second driving chain wheel, 15, step motor II, 16, liquid crystal display screen, 17, switching power supply, 18, storage plate, 19, driver I, 20, driver II, 21, pressing roller group, 22, angle measuring plate, 23, seedling releasing claw, 24, ring-shaped conveying chain, 25, travel switch, 26, single-chip microcomputer, 27, rotating shaft, 28, torsional spring, 29, coupling, 30, angle sensor, 31, step motor I, 32, first driving chain wheel, 33, first transmission chain, 34, first driven chain wheel. DETAILED DESCRIPTION

[0030] In order to clearly illustrate the technical features of the present application, the present application will be described below through specific embodiments.

[0031] As Figures 1-4 shown in one sweet potato seedling rope bundling machine, including frame 1, and installed on the frame seedling conveying device 7, rope mechanism and bundling mechanism, rope mechanism and bundling mechanism form sweet potato seedling rope bundling device 10. Sweet potato seedling conveying device 7 is used to forward conveying sweet potato seedlings, bundling mechanism is located in the front of the sweet potato seedling conveying device along the sweet potato seedling conveying direction, the rope mechanism is used to rope the sweet potato seedlings with adhesive tape, and the bundling mechanism is used to wrap the sweet potato seedlings with rope.

[0032] The sweet potato seedling conveying device includes an annular conveying chain 24 rotatably arranged on the frame, a conveying drive device for driving the annular conveying chain 24 to rotate, and a plurality of spacingly arranged seedling placing claws 23 on the outer side of the annular conveying chain. The sweet potato seedlings are transversely placed on the seedling placing claws, and the spacing between adjacent seedling placing claws is consistent to ensure the consistency of the spacing of the sweet potato seedlings.

[0033] The seedling placing claw 23 includes at least two bottom rods extending in the left-right direction and fixed to the annular conveying chain, and a plurality of blocking rods extending upward from the bottom rods. Each bottom rod is fixed to the blocking rods by a support rod, and the lower adhesive tape passes between adjacent two blocking rods. In this embodiment, each seedling placing claw includes two parallel bottom rods, the ends of the support rod are welded to the two bottom rods, and the lower adhesive tape passages formed by the adjacent two blocking rods of each seedling placing claw are opposite in the front-rear direction to avoid the deflection of the lower adhesive tape. The blocking rods not only serve as front and rear limiters for the sweet potato seedlings to prevent displacement of the sweet potato seedlings, but also serve as left and right limiters for the lower adhesive tape.

[0034] The annular conveying chain of this embodiment includes two annular chains, and the left and right ends of the seedling placing claw 23 are fixed to the two annular chains, respectively. The seedling placing claw of this embodiment is 14, and the two annular chains are parallel to each other, thereby ensuring that the conveying chain can more stably convey the seedling placing claw. The setting of the seedling placing claw provides support for the placement of the sweet potato seedlings.

[0035] The conveying drive device includes a stepping motor I 31, a first driving sprocket 32, a first driven sprocket 34, and a first transmission chain 33. Specifically, the seedling conveying device 7 is fixedly provided with a bearing seat on the frame on both sides, and a sprocket shaft 2 is rotatably connected to the bearing seat. The sprocket shaft 2 is evenly distributed by a plurality of sprocket shafts 2, and a conveying sprocket 6 adapted to the annular conveying chain 24 is installed on the sprocket shaft 2. The stepping motor I 31 is fixedly arranged on the frame below the annular conveying chain 24, the output shaft of the stepping motor I 31 is fixedly provided with the first driving sprocket 32, the first driving sprocket 32 is drivingly connected to the first driven sprocket 34 through the first transmission chain 33, the first driving sprocket 32 drives the first driven sprocket 34 to rotate through the first transmission chain 33, the first driven sprocket 34 is fixedly arranged on one end of the annular conveying chain end sprocket shaft 2, and the first driven sprocket 34 drives the conveying sprocket 6 and the annular conveying chain 24 to rotate when the first driven sprocket 34 rotates.

[0036] The potato seedling rope-braiding and bundling device 10 includes a rope-braiding mechanism, a bundling mechanism, a stepper motor II 15, and a control device for adjusting the speed of the stepper motor II 15, which drives the rope-braiding mechanism and the bundling mechanism through a transmission component to complete the rope-braiding and bundling actions.

[0037] The bundling mechanism includes a seedling-rolling shaft 11 rotatably connected to the frame, and a seedling-rolling drive device that drives the seedling-rolling shaft 11 to rotate. The seedling-rolling shaft extends horizontally in the left-right direction and is rotatably connected to the frame via a bearing seat fixed to the frame. A second driven sprocket 12 is fixedly mounted on one end of the seedling-rolling shaft 11 near the bearing seat. The second driven sprocket 12 is connected to a second driving sprocket 14 fixedly mounted on the output shaft of the stepper motor II 15 via a second transmission chain 13. The stepper motor II 15, the second driven sprocket 12, the second driving sprocket 14, and the second transmission chain 13 form the seedling-rolling drive device. The transmission from the stepper motor II to the seedling-rolling shaft is achieved through chain transmission, which has high reliability and high transmission efficiency.

[0038] A protractor 22 is rotatably connected to the frame via a rotating shaft 27. The rotating shaft is rotatably connected to the frame via a bearing. The rotating shaft 27 is parallel to the seedling rolling shaft 11. The protractor 22 extends to the side of the seedling rolling shaft away from the seedling conveying device. The protractor 22 is also connected to the frame via a torsion spring 28. In this embodiment, the torsion spring is a double torsion spring structure. The two ends of the torsion spring 28 are fixed to the frame and the protractor 22, respectively. The end of the protractor 22 away from the rotating shaft is tangent to the seedling rolling shaft 11 under the action of the torsion spring. The torsion spring causes the end of the protractor away from the rotating shaft to have a tendency to move closer to the seedling rolling shaft. When the seedling rolling shaft winds the seedlings, the torsion spring causes the protractor to press against the outer circle of the seedling bundle, making the seedling bundles wound on the seedling rolling shaft more compact and improving the bundling quality.

[0039] In this embodiment, the protractor 22 is fixedly connected to the rotating shaft 27. An angle sensor 30, connected to the rotating shaft via a coupling 29, is mounted on the frame. The angle sensor detects the angle change of the protractor 22 to obtain the change in the radius of the potato seedling bundle wrapped on the seedling roll. When potato seedlings are wrapped on the seedling roll, the angle between the plane containing the rotating shaft and the seedling roll and the protractor is θ. When there are no potato seedlings wrapped on the seedling roll, and the protractor is in direct contact and tangent to the seedling roll, the angle between the plane containing the rotating shaft and the seedling roll and the protractor is α. The rotation angle β of the protractor during the wrapping of potato seedlings on the seedling roll is θ = α + β.

[0040] like Figure 6 As shown, after the bundling mechanism starts moving, potato seedlings are wrapped around the seedling roller. As the winding radius of the seedlings increases, the angle between the plane formed by the axis of rotation and the axis of the seedling roller and the protractor 22 increases. Increase; simultaneously, the protractor 22 drives the rotating shaft 27 to rotate, and the angle sensor 30 detects the change in the rotation angle of the rotating shaft, the included angle The relationship with the radius of the potato seedling bundle on the seedling winding shaft 11 is ; wherein, is the distance between the rotating shaft and the axis of the seedling winding shaft, R is the radius of the potato seedling bundle. The radius of the potato seedling bundle on the seedling winding shaft is converted into angle information by the protractor, and the data is collected in real time by the angle sensor, thereby ensuring the continuity of the control of the stepping motor II.

[0041] The rope winding mechanism comprises a guide wheel 5, a lower adhesive tape roller 4, an upper adhesive tape roller 8 and a compression roller set 21, which are rotatably arranged on the frame, and the compression roller set 21 is located between the potato seedling conveying device 7 and the seedling winding shaft 11. The compression roller set comprises an upper roller and a lower roller, which are rotatably arranged on the frame, and a compression channel is formed between the upper roller and the lower roller.

[0042] The lower adhesive tape roller is located behind the annular conveying chain, and two adhesive tape reels I 3 distributed in the left and right directions are installed on the lower adhesive tape roller. The guide wheel is located between the lower adhesive tape roller and the rear end sprocket shaft of the potato seedling conveying device, and the guide wheel is also distributed in the left and right directions. The two guide wheels are opposite to each other in front of and behind the two adhesive tape reels I, and the adhesive tape reels I are lower than the guide wheels in the height direction, so as to facilitate reliable support of the guide wheels to the adhesive tape, pull the movable end of the lower adhesive tape, make the movable end of the lower adhesive tape pass through the guide wheel 5, adjust the position of the lower adhesive tape through the guide wheel 5, lay the lower adhesive tape on the seedling releasing claw 23, and keep parallel with the ends of the seedling releasing claw. The adhesive tape on the adhesive tape reels I 3 is the lower adhesive tape with the adhesive surface facing upward, the movable end of the lower adhesive tape extends forward along the potato seedling support surface of the potato seedling conveying device, and is wound on the seedling winding shaft 11 after passing through the compression channel. The potato seedlings on the potato seedling conveying device are located above the lower adhesive tape. The two lower adhesive tapes support the potato seedlings, thereby improving the stability of the potato seedlings after rope winding.

[0043] The upper adhesive tape roller is located above the front end of the annular conveying chain 24, and two adhesive tape reels II 9 distributed in the left and right directions are installed on the upper adhesive tape roller. The adhesive tape on the adhesive tape reels II 9 is the upper adhesive tape with the adhesive surface facing downward and opposite to the lower adhesive tape. The movable end of the upper adhesive tape is wound on the seedling winding shaft after passing through the compression channel. When passing through the compression channel, the potato seedlings are located between the upper adhesive tape and the lower adhesive tape.

[0044] Both the upper adhesive tape and the lower adhesive tape are degradable adhesive tapes. The potato seedlings are wound by the degradable adhesive tapes, and the potato seedlings after rope winding can be directly loaded on the machine for transplanting, the planting spacing is also better guaranteed, the efficiency of sweet potato planting is greatly improved, the labor intensity is reduced, and the soil is not polluted.

[0045] The step motor Ⅰ 31 drives the sprocket shaft 2 to rotate through the chain transmission, and the ring conveying chain 24 rotates accordingly. The pre-roped seedlings are placed on the seedling placing claws 23 and pasted on the adhesive tape. The ring conveying chain 24 conveys the pre-roped seedlings to the pressing roller group 21. The pressing roller group extrudes the adhesive tape and the seedlings, so that the seedlings are pasted on the adhesive tape, and the roping action is completed. At the same time, the step motor Ⅱ 15 drives the seedling winding shaft 11 to rotate through the second transmission chain 13. The seedling winding shaft 11 pulls the adhesive tape, and the roped seedlings are wound into a bundle. The upper roller and the lower roller of the pressing roller group 21 are both sleeved with rubber sleeves, so that damage to the seedlings can be avoided during extrusion of the adhesive tape and the seedlings.

[0046] When the seedling roping and bundling device 10 is running, the radius of the seedling bundle on the seedling winding shaft 11 increases, and the linear speed of the adhesive tape driven by the seedling winding shaft increases. In order to ensure that the linear speed of the adhesive tape is consistent with the speed of the ring conveying chain 24 and avoid the adhesive tape driving the seedlings in the seedling placing claws 23 to move, the embodiment further includes a control device arranged on the rack. The control device is used to control the rotating speed of the step motor Ⅱ 15.

[0047] The rotating speed of the step motor Ⅱ and the radius of the seedling bundle have the following relationship:

[0048]

[0049] wherein, is the rotating speed of the step motor Ⅰ, is the rotating speed of the step motor Ⅱ, r is the radius of the transmission sprocket, R is the radius of the seedling bundle, i 1 is the ratio of the number of teeth of the first driving sprocket to the number of teeth of the first driven sprocket, i 2 is the ratio of the number of teeth of the second driving sprocket to the number of teeth of the second driven sprocket.

[0050] The control device includes a driver Ⅱ 20, a single-chip microcomputer 26, a switching power supply 17, and is arranged in a placement plate 18 fixed below the rack. The driver Ⅱ 20 is connected with the single-chip microcomputer 26, the step motor Ⅱ 15 and the switching power supply 17 through wires. The single-chip microcomputer 26 is communicatively connected with an angle sensor 30. Through a pre-designed control strategy, a pulse signal is sent to the driver Ⅱ. The driver Ⅱ converts the pulse signal into angular displacement to control the rotating speed of the step motor Ⅱ. Through the single-chip microcomputer sending a pulse signal to the driver Ⅱ, precise control of the rotating speed of the step motor Ⅱ is realized. The angle sensor 30 converts the angle value of the rotating shaft into an analog signal and transmits it to the single-chip microcomputer 26. The step motor Ⅰ is electrically connected with the driver Ⅰ 19, and the driver Ⅰ 19 is electrically connected with the single-chip microcomputer 26. The control strategy is that the single-chip microcomputer 26 sends a pulse signal to the driver Ⅰ 19 to control the step motor Ⅰ 31 to rotate at a speed of at the same time, receives the analog signal from the angle sensor, and controls the rotating speed of the step motor Ⅱ through the formula and the formula The rotation speed of the stepper motor II is calculated and the rotation speed of the stepper motor II is output The required pulse signal is sent to the driver II 20, which converts the pulse signal into angular displacement to control the rotation speed of the stepper motor II. The operation data of the stepper motor I and the angle sensor are obtained by the single-chip microcomputer to control the rotation speed of the stepper motor II in real time, so as to ensure that the linear speed of the rubber belt pulled by the seedling shaft is consistent with the speed of the ring-shaped conveying chain.

[0051] In order to realize automatic counting of the rope-tying sweet potato seedlings, a travel switch 25 matched with the seedling claw is installed on the frame in the embodiment, and the number of sweet potato seedlings conveyed by the sweet potato seedling conveying device is calculated according to the number of times that the travel switch is touched by the seedling claw. The travel switch 25 is connected with the single-chip microcomputer 26 through wires, and the travel switch is in a normally open state. The circuit signal received by the single-chip microcomputer is at a low level, the ring-shaped conveying chain starts to move, the seedling claw teeth touch the contact points of the travel switch 25, the circuit is closed, the circuit signal received by the single-chip microcomputer is at a high level, and the seedling claw 23 moves away from the contact points, and the contact points return to the original state under the action of the reset spring. The single-chip microcomputer obtains the opening and closing times of the travel switch by capturing the pulse signal, converts the opening and closing times, calculates the number of sweet potato seedlings conveyed by the sweet potato seedling conveying device, and outputs the number of sweet potato seedlings to the liquid crystal display screen 16 in communication connection with the single-chip microcomputer 26, so as to realize automatic counting of the rope-tying sweet potato seedlings. The liquid crystal display screen 16 is fixed on the side of the frame.

[0052] The rope-tying bundling method of the sweet potato seedling rope-tying bundling machine in the embodiment includes the following steps.

[0053] Step one: the movable end of the lower rubber belt is pulled to make the lower rubber belt pass through the guide wheels arranged on the frame, lay flat along the conveying direction, and pass through the adjacent blocking rods between the upper layer seedling claws of the ring-shaped conveying chain in sequence; the movable end of the upper rubber belt is pulled to wrap around the seedling shaft after passing through the pressing channel of the pressing roller group with the lower rubber belt.

[0054] Step two: the worker places the pre-rope-tying sweet potato seedlings on the seedling claws on the ring-shaped conveying chain, uses the rotation of the ring-shaped conveying chain to convey the sweet potato seedlings to the pressing channel of the pressing roller, and uses the upper roller and the lower roller of the pressing roller to extrude the upper rubber belt, the lower rubber belt and the sweet potato seedlings, so that the sweet potato seedlings are pasted on the rubber belt to complete the rope-tying action. The rotation of the seedling shaft is used to wrap the rope-tying sweet potato seedlings on the seedling shaft to form a seedling bundle.

[0055] Step three: in the rotation process of the ring-shaped conveying chain, each seedling claw touches the travel switch in sequence, the control device obtains the opening and closing times of the travel switch, calculates the number of pre-rope-tying sweet potato seedlings conveyed by the ring-shaped conveying chain, and outputs the number to the liquid crystal display screen 16 to realize automatic counting of the rope-tying sweet potato seedlings.

[0056] The sweet potato seedlings are woven on the degradable rope or adhesive tape to ensure the uniform distribution of the seedlings in the field, and the planting efficiency is greatly improved and the labor intensity is reduced. The sweet potato seedling rope bundling machine of the embodiment can not only realize automatic weaving and bundling of the sweet potato seedlings, but also can automatically count the woven sweet potato seedlings, and the finished sweet potato seedling bundles can be directly loaded on the machine for transplanting, and the planting spacing is also better guaranteed.

[0057] Of course, the above description is not limited to the above examples, and the technical features not described in the application can be realized by or using the prior art, which will not be described here; the above examples and drawings are only used to illustrate the technical solutions of the application and are not a limitation on the application, and the application has been described in detail with reference to the preferred embodiments, and those skilled in the art should understand that the changes, modifications, additions or substitutions made by those skilled in the art within the essential scope of the application do not deviate from the purpose of the application, and should also belong to the protection scope of the claims of the application.

Claims

1. A sweet potato seedling rope-braiding and baling machine, characterized in that: It comprises a frame (1), and a potato seedling conveying device (7), a rope winding mechanism and a bundling mechanism installed on the frame, wherein the bundling mechanism is located in front of the potato seedling conveying device; The bundling mechanism comprises a seedling winding shaft (11) rotationally connected with the frame, and a seedling winding driving device for driving the seedling winding shaft (11) to rotate; The rope winding mechanism comprises a lower adhesive tape roller (4), an upper adhesive tape roller (8) and a pressing roller set (21) rotationally arranged on the frame, wherein the pressing roller set (21) is located between the potato seedling conveying device (7) and the seedling winding shaft (11); The pressing roller set comprises an upper roller and a lower roller rotationally arranged on the frame, and a pressing channel is formed between the upper roller and the lower roller; The lower adhesive tape roller is provided with an adhesive tape disc I (3), the adhesive tape on the adhesive tape disc I (3) is a lower adhesive tape with an adhesive surface facing upward, the movable end of the lower adhesive tape extends forward along a potato seedling supporting surface of the potato seedling conveying device, and then winds around the seedling winding shaft (11) after passing through the pressing channel, and the potato seedlings on the potato seedling conveying device are located above the lower adhesive tape; the upper adhesive tape roller is provided with an adhesive tape disc II (9), the adhesive tape on the adhesive tape disc II (9) is an upper adhesive tape with an adhesive surface facing downward and opposite to the lower adhesive tape, and the movable end of the upper adhesive tape winds around the seedling winding shaft after passing through the pressing channel, and the potato seedlings are located between the upper adhesive tape and the lower adhesive tape when passing through the pressing channel; The frame is rotationally connected with a protractor (22) through a rotating shaft (27), the rotating shaft (27) is parallel to the seedling winding shaft (11), the protractor (22) extends to a side of the seedling winding shaft away from the potato seedling conveying device, and the protractor and the frame are further connected through a torsional spring (28), the torsional spring makes the end of the protractor away from the rotating shaft have a moving trend close to the seedling winding shaft, and the torsional spring makes the protractor close to the outer circle of the potato seedling bundle when the seedling winding shaft winds the potato seedlings; The protractor (22) is fixedly connected with the rotating shaft (27), the frame is provided with an angle sensor (30) connected with the rotating shaft, the angle sensor is used to detect the angle change of the protractor, and the radius change of the potato seedling bundle wound on the seedling winding shaft is obtained; The potato seedling conveying device comprises an annular conveying chain (24) rotationally arranged on the frame, and a conveying driving device for driving the annular conveying chain (24) to rotate, and the outer side of the annular conveying chain is provided with a plurality of seedling placing claws (23) arranged in a circumferential direction and spaced apart in sequence; The conveying driving device comprises a step motor I (31), a first driving sprocket (32), a first driven sprocket (34) and a first transmission chain (33), the output shaft of the step motor I (31) is fixedly provided with the first driving sprocket (32), and the first driving sprocket (32) is transmissionally connected with the first driven sprocket (34) through the first transmission chain (33); the frame on both sides of the potato seedling conveying device (7) is fixedly provided with a bearing seat, the bearing seat is rotationally connected with a sprocket shaft (2), and the sprocket shaft (2) is provided with a conveying sprocket (6) matched with the annular conveying chain (24); It further comprises a step motor II (15) and a control device for adjusting the rotating speed of the step motor II (15); One end of the seedling winding shaft (11) is fixed with a second driven sprocket (12), and the second driven sprocket (12) is in transmission connection with a second driving sprocket (14) fixed on the output shaft of the stepping motor II (15) through a second transmission chain (13); The stepping motor II rotation speed and the potato seedling bundle radius have the following relationship: wherein, is the rotational speed of the stepper motor I, is the rotational speed of the stepper motor II, r is the radius of the indexing circle of the conveyor sprocket, R is the radius of the potato seedling bundle, i 1 is the ratio of the number of teeth of the first drive sprocket to the number of teeth of the first driven sprocket, i 2 is the ratio of the number of teeth of the second drive sprocket to the number of teeth of the second driven sprocket; The control device includes a driver II (20) and a single-chip microcomputer (26), the driver II (20) is connected with the single-chip microcomputer (26) and the stepping motor II (15) through wires, the single-chip microcomputer (26) is in communication connection with an angle sensor (30), a pulse signal is sent to the driver II through a pre-designed control strategy, the driver II converts the pulse signal into an angular displacement to realize the control of the stepping motor II rotation speed, the single-chip microcomputer sends a pulse signal to the driver II to realize the accurate control of the stepping motor II rotation speed, the angle sensor (30) converts the rotation shaft angle value into an analog signal and transmits the analog signal to the single-chip microcomputer (26), the stepping motor I is electrically connected with a driver I (19), and the driver I (19) is electrically connected with the single-chip microcomputer (26); The control strategy is as follows: the microcontroller (26) sends pulse signals to the driver I (19) to control the stepper motor I (31) to... The rotation speed is adjusted, and an analog signal is received from the angle sensor. This signal is then processed using the formula... and formula Calculate the speed of stepper motor II And output the speed of stepper motor II. The required pulse signal is sent to driver II (20). Driver II (20) converts the pulse signal into angular displacement to control the speed of stepper motor II. θ is the angle between the plane where the rotating shaft and the seedling shaft are located and the protractor; L is the distance between the center of the rotating shaft and the seedling shaft.

2. The sweet potato vine twining and bundling machine according to claim 1, characterized in that: The seedling releasing claw (23) comprises at least two bottom rods extending along the left-right direction and fixed with the annular conveying chain and a plurality of blocking rods extending upward from the bottom rods, each bottom rod is fixed with the support rod to be integrated, and the lower adhesive tape passes through between adjacent two blocking rods.

3. The sweet potato vine twining and bundling machine according to claim 2, characterized in that: The rack is provided with a travel switch (25) matched with the seedling releasing claw, and the number of potato seedlings conveyed by the potato seedling conveying device is calculated according to the number of times that the travel switch is touched by the seedling releasing claw.

4. A method of bundling the vines of sweet potato according to claim 3, wherein The method comprises the following steps: Step one: the movable end of the lower adhesive tape is pulled to pass around the guide wheel arranged on the rack, is laid flat in the conveying direction and passes through between adjacent blocking rods of each seedling releasing claw on the upper layer of the annular conveying chain in sequence, and the movable end of the upper adhesive tape is pulled to be wound on the seedling winding shaft after passing through the pressing channel of the pressing roller group with the lower adhesive tape; Step two: the worker lays the pre-rope potato seedlings on the seedling releasing claw on the annular conveying chain, the potato seedlings are conveyed to the pressing channel of the pressing roller by the rotation of the annular conveying chain, the upper roller and the lower roller of the pressing roller extrude the upper adhesive tape, the lower adhesive tape and the potato seedlings, so that the potato seedlings are adhered to the adhesive tape, the rope coding action is completed, the rotation of the seedling winding shaft is utilized to wind the coded potato seedlings on the seedling winding shaft to form a seedling bundle; Step three: in the rotation process of the annular conveying chain, each seedling releasing claw touches the travel switch in sequence, the control device acquires the opening and closing times of the travel switch, the number of pre-rope potato seedlings conveyed by the annular conveying chain is calculated, and the automatic counting of the coded potato seedlings is realized.

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