Telescopic feeding device and method for tobacco leaf sorting and grading

Abstract

The present invention relates to the technical field of tobacco leaf feeding devices, and in particular to a telescopic feeding device for tobacco leaf sorting and grading. Its technical solution includes: a tobacco leaf diffuser that can shake the belt according to the degree of tobacco leaf accumulation on the belt, including a tobacco leaf diffuser including a docking shaft, a slider, a load-bearing spring, a movable bevel gear, a double-end gear plate, a transmission mechanism and a diffusion rod, the end of the docking shaft is rotatably connected to the slider, the bottom of the slider is fixedly installed with a load-bearing spring, and the end of the docking shaft is fixedly installed with a movable bevel gear. In the present invention, when the gravity of the tobacco leaves and the belt is greater than the elastic force of the load-bearing spring, it means that the number of tobacco leaves on the belt is large and not evenly distributed on the belt, the diffusion rod hits the belt, and a bulge is generated at the impact point of the diffusion rod on the column, and the tobacco leaves are diffused around along the bulge position, and the tobacco leaves are evenly spread out to avoid tobacco leaf accumulation aggravating the wear of the belt, and the tobacco leaves are scattered for sorting and grading.

Description

Technical Field

[0001] The present invention relates to the technical field of feeding devices, and in particular to a telescopic feeding device and method for tobacco leaf sorting and grading. Background Art

[0002] The telescopic feeding device is an automated feeding equipment, which is widely used in various material delivery, especially in large-scale automated production lines. It can save labor costs and improve production efficiency for enterprises. The telescopic feeding device changes the length of the feeding device according to the length of the material to be conveyed. The telescopic feeding device is mainly composed of a telescopic mechanism, a feeding mechanism and a control system. The telescopic mechanism is used to control the telescopic length of the feeding arm, and the feeding mechanism is used to transport the material to the specified position. The telescopic feeding device is often used to feed tobacco leaves in tobacco sorting.

[0003] In the patent document with the publication number CN115626427A, a retractable belt conveyor based on material transportation is disclosed. A plurality of deviation correction components equidistantly distributed along the conveying direction are arranged inside the closed loop formed by the conveyor belt. The deflection of the conveyor belt can be detected through the mutual induction of the sensor component and the flexible sensing sheet, and the deflection direction of the belt can be clearly judged and identified by the processor, thereby realizing rapid and contactless deviation detection of the conveyor belt.

[0004] When the above device is in use, after the conveyor is extended or retracted, the belt area supported by the conveyor rollers increases, while the number of conveyor rollers remains unchanged, and the distance between two adjacent conveyor rollers becomes larger, materials pile up together, and under the action of gravity, the materials press down on the belts between the two adjacent conveyor rollers to form a depression, and the materials accumulate in the depression, aggravating the belt wear. Summary of the invention

[0005] The purpose of the present invention is to address the problem in the background technology that the increase in the interval between adjacent conveying rollers reduces the supporting force of the belt, causing the belt to sag and aggravate wear, and to propose a telescopic feeding device and method for tobacco leaf sorting and grading.

[0006] The technical solution of the present invention is: a telescopic feeding device for tobacco leaf sorting and grading, comprising a telescopic feeder and a main support part, characterized in that a storage groove is provided on the main support part, and a secondary support part for supporting a belt of an elongated part is slidably installed in the storage groove, and further comprising:

[0007] A tobacco leaf diffuser that can shake a belt according to the degree of tobacco leaf accumulation on the belt, comprising a docking shaft, a slider, a load-bearing spring, a movable bevel gear, a double-end toothed disc, a transmission mechanism and a diffusion rod, wherein the end of the docking shaft is rotatably connected with the slider, the bottom of the slider is fixedly installed with a load-bearing spring, the end of the docking shaft is fixedly installed with a movable bevel gear, when the slider moves to a limit value, the double-end toothed disc is meshed with the movable bevel gear, a transmission mechanism is arranged at the end of the double-end toothed disc, a diffusion rod is arranged at the top of the transmission mechanism, and the diffusion rod is located below the belt of the extended portion;

[0008] The auxiliary supporting part comprises a folding plate, the sliding block slides up and down on the side of the folding plate, and the bottom end of the load-bearing spring is elastically connected to the folding plate.

[0009] Optionally, the side of the folding plate slides up and down, and the inside of the folding plate is elastically connected to a positioning spring sheet that supports the slider, an expansion groove is provided at the elastic connection between the folding plate and the positioning spring sheet, and the end of the positioning spring sheet is located in the expansion groove, and the slider slides up and down inside the folding plate, and a magnetic block and a support plate are fixedly installed inside the folding plate, a middle hole is provided at the center of the magnetic block, and the load-bearing spring passes through the middle hole and is fixedly connected to the support plate.

[0010] Optionally, the transmission part includes a circular plate, a reciprocating ring and a support plate, a bevel gear is coaxially connected to the center of the circular plate, the bevel gear is meshingly connected to the double-end gear disk, a column deviating from the center of the circular plate is fixedly installed on the plane of the circular plate, the arc surface of the column contacts the reciprocating ring, the top of the reciprocating ring is fixedly installed with a support plate, the top of the support plate is fixedly installed with a diffusion rod, and the support plate slides up and down on the side of the folding plate.

[0011] Optionally, the secondary support part includes a main support part, a telescopic frame, a folding plate, a folding support roller, a first coil spring and a limit assembly, the telescopic frame slides left and right inside the main support part, the inner frame of the telescopic frame is rotatably connected to the folding plate, the first coil spring is elastically connected between the folding plate and the telescopic frame, both ends of the folding support roller are rotatably connected to the folding plate, the roller body of the folding support roller contacts the belt, a plurality of folding support rollers are provided, and are equidistantly distributed in a straight line in the inner frame of the telescopic frame, the folding plate is folded and arranged inside the main support part, the first coil spring is in a compressed state, a limit assembly is provided on the telescopic frame, and the limit assembly is clamped with the folding plate.

[0012] Optionally, the main support portion is fixedly mounted on a telescopic feeder, an electric push rod is fixedly mounted on the side of the telescopic feeder, a telescopic plate is fixedly mounted on the end of the electric push rod, the telescopic frame is fixedly connected to the telescopic plate, a correcting offset member is provided on the side of the telescopic conveyor body, a limiting assembly comprises a locking baffle and a limiting baffle, the limiting baffle is fixedly mounted in the frame of the telescopic frame, the internal sliding connection of the telescopic frame is connected to the limiting baffle, the locking baffle and the limiting baffle clamp the folding plate, a first magnet is fixedly mounted inside the telescopic frame and on an end extension line of the locking baffle, an insulating baffle is slidably connected inside the telescopic frame and at an end position of the first magnet, the insulating baffle is located between the locking baffle and the first magnet, an intermediate shaft is rotatably connected inside the telescopic frame, and the intermediate shaft passes through the folding plate.

[0013] Optionally, a wedge block is slidably connected inside the telescopic frame, a coil spring is elastically connected between the wedge block and the telescopic frame, the side of the wedge block is meshingly connected with a transmission gear, the transmission gear is meshingly connected with a toothed plate, the end of the toothed plate is fixedly connected to an insulating baffle, a second magnet is fixedly installed on both sides of the locking baffle, the magnetic force of the second magnet is smaller than that of the first magnet, and a rubber plate is fixedly installed between the locking baffle and the second magnet.

[0014] Optionally, the deviation correction component includes a synchronous plate, a docking end toothed disc, a transfer bevel gear, a correction gear, a screw, an extension plate, a roller, a sleeve and a driven roller. The docking end toothed disc is fixedly installed at the bottom center of the synchronous plate, the docking end toothed disc is rotatably connected to the telescopic plate, the transfer bevel gear is connected to the correction gear through a belt, the correction gear is rotatably connected to the telescopic conveyor body, the docking end toothed disc is connected to the correction gear through an intermediate piece, the extension plate is fixedly connected to the telescopic conveyor body, the middle part of the screw is threadedly connected to the extension plate, the end of the screw is meshed with the correction gear, the end of the screw is rotatably connected to the roller, an annular groove is opened at the end of the sleeve, the roller slides in the annular groove, the sleeve is sleeved on the driven roller, a convex strip is fixedly installed on the arc surface of the driven roller, and the middle part of the sleeve contacts the belt.

[0015] Optionally, a notched rotating shaft is fixedly installed at the fixed center of the bottom of the synchronous plate, a separation block is rotatably connected to the bottom of the notched rotating shaft, a second coil spring is elastically connected between the notched rotating shaft and the separation block, an adjustment slot is provided on the top of the telescopic plate, the separation block slides left and right in the adjustment slot at the top of the telescopic plate, a return spring is elastically connected between the separation block and the telescopic plate, a positioning plug plate is fixedly installed in the adjustment slot of the telescopic plate, the positioning plug plate is clamped with the notched rotating shaft, and when the notched rotating shaft is separated from the positioning plug plate, the butt-end toothed disc is meshed and connected with the deviation correction gear.

[0016] Optionally, a roller is rotatably connected to the receiving groove of the main support part, the roller is parallel to the intermediate shaft, the inclined surface of the wedge block is in contact with the main support part, the side of the telescopic plate is fixedly installed with a telescopic conveyor body, the side of the telescopic plate is rotatably connected to a movable roller shaft, and the belt sleeve is at the roller body of the movable roller shaft.

[0017] A telescopic feeding method for tobacco leaf sorting and grading is applied to the telescopic feeding device for tobacco leaf sorting and grading, and the steps are as follows:

[0018] S1. Adjust the length: The electric push rod extends to move the telescopic conveyor body. The telescopic conveyor body moves and the telescopic plate is used to change the position of the movable roller shaft, thereby extending the distance between the telescopic feeder and the telescopic conveyor body, thereby extending the conveying distance;

[0019] S2, increase support: when extending the conveying distance, the telescopic plate moves to pull the telescopic frame out of the main support part, the folding plate and the folding support roller in the telescopic frame are pulled out, the first coil spring in the folded state bounces up the folding plate and the folding support roller, and the folding support roller contacts the belt;

[0020] S3, locked position: the folding plate extends from the main support part, and then the wedge block extends from the main support part. At this time, the elastic force of the coil spring ejects the wedge block, and the wedge block blocks the first magnet through the insulating baffle through the transmission gear and the toothed plate. The second magnet moves toward the telescopic frame under the action of the magnetic force to extend the locking baffle. The locking baffle cooperates with the limit baffle to lock the position of the folding plate;

[0021] S4, gathering and separation: When tobacco leaves gather together, the gravity of tobacco leaves and belt is greater than the elastic force of load-bearing spring, the docking shaft and slider move downward, that is, the movable bevel gear moves downward, the movable bevel gear meshes with the double-end gear disc, so that the circular plate rotates, and the circular plate uses the column to make the reciprocating ring and the diffusion rod reciprocate up and down to separate the tobacco leaves;

[0022] S5. Offset correction: When the belt deviates in the direction of the screw, the correction gear drives the screw to rotate forward, and the screw uses the roller to push the sleeve to correct the belt deviation. The belt deviates away from the screw, and the screw reverses and uses the roller to pull the sleeve to correct the belt deviation.

[0023] Compared with the prior art, the present invention has the following beneficial technical effects:

[0024] When the gravity of the tobacco leaves and the belt is greater than the elastic force of the load-bearing spring, it means that the number of tobacco leaves on the belt is large and not evenly distributed on the belt. The diffusion rod hits the belt, and a bulge is generated at the impact point of the diffusion rod on the column. The tobacco leaves spread around along the bulge, and the tobacco leaves are separated, thereby spreading the tobacco leaves evenly, avoiding tobacco leaf accumulation and aggravating belt wear. At the same time, the tobacco leaves are scattered for sorting and grading.

[0025] The intermediate shaft and the folding support roller in the telescopic frame are extended, and the folding plate pops up under the elastic force of the first coil spring, so that the folding support roller contacts the belt, and at the same time the locking baffle is extended and cooperates with the limit baffle to lock the position of the folding plate. The folding support roller supports the belt to prevent the conveying length from increasing and the middle part of the belt from being concave. The tobacco leaves on the belt gather in the concave position, which affects the efficiency of tobacco leaf sorting and grading and aggravates the wear of the belt.

[0026] Furthermore, when the belt deviates toward the screw, the correcting gear drives the screw to rotate forward, and the screw uses the roller to push the sleeve to correct the belt deviation; when the belt deviates away from the screw, the screw reverses and uses the roller to pull the sleeve to correct the belt deviation, thereby avoiding the change in the conveying direction of tobacco leaves and causing them to fall due to the belt deviation, and reducing the wear of the belt. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A schematic diagram of a telescopic conveyor body structure in a contracted state according to an embodiment of the present invention is provided;

[0028] Figure 2 A schematic diagram of a telescopic frame structure according to an embodiment of the present invention is provided;

[0029] Figure 3 Give this Figure 2 A schematic diagram of the enlarged circular plate structure of part A;

[0030] Figure 4 A schematic cross-sectional view of a folding plate structure according to an embodiment of the present invention is provided;

[0031] Figure 5 A schematic cross-sectional view of the main support structure of an embodiment of the present invention is given;

[0032] Figure 6 A schematic cross-sectional view of a telescopic frame structure according to an embodiment of the present invention is provided;

[0033] Figure 7 A schematic diagram of a telescopic conveyor body structure in an extended state according to an embodiment of the present invention is provided;

[0034] Figure 8 Given Figure 7 A magnified schematic diagram of the screw structure of part B;

[0035] Fig. 9 A schematic diagram of the notched shaft structure of an embodiment of the present invention is provided;

[0036] Fig.10 A schematic left-side sectional view of a sleeve structure according to an embodiment of the present invention is given.

[0037] Figure numerals: 1, telescopic feeder; 2, main support; 3, electric push rod; 4, telescopic plate; 5, telescopic conveyor body; 6, moving roller shaft; 7, auxiliary support; 71, first magnet; 72, second magnet; 73, insulating baffle; 74, roller; 75, telescopic frame; 76, intermediate shaft; 77, folding plate; 78, folding support roller; 79, locking baffle; 710, limit baffle; 711, first coil spring; 712, wedge block; 713, spiral spring; 714, transmission gear; 715, tooth plate; 8, deviation correction member; 81, synchronization plate; 82, notched shaft; 8 3. Butt-end toothed disc; 84. Transfer bevel gear; 85. Correction gear; 86. Screw; 87. Extension plate; 88. Roller; 89. Positioning plug plate; 810. Separation block; 811. Second coil spring; 812. Return spring; 813. Sleeve; 814. Driven roller; 9. Tobacco diffuser; 91. Butt-end shaft; 92. Slider; 93. Load-bearing spring; 94. Support plate; 95. Magnetic block; 96. Positioning spring sheet; 97. Moving bevel gear; 98. Double-end toothed disc; 99. Round plate; 910. Column; 911. Reciprocating ring; 912. Support plate; 913. Diffuser rod. DETAILED DESCRIPTION

[0038] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0039] The components of the embodiments of the present invention generally described and shown in the drawings herein may be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention.

[0040] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present invention.

[0041] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0042] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. Example

[0043] This embodiment provides a telescopic feeding device for tobacco leaf sorting and grading. Figure 1 As shown, it includes a telescopic feeder 1 and a main support part 2, the main support part 2 is provided with a storage groove, and a secondary support part 7 for supporting the belt of the extended part is slidably installed in the storage groove, an electric push rod 3 is fixedly installed on the side of the telescopic feeder 1, and a telescopic plate 4 is fixedly installed on the end of the electric push rod 3.

[0044] like Figure 1 and 7 As shown, a telescopic conveyor body 5 is fixedly installed on the side of the telescopic plate 4, a main support part 2 is rotatably connected to the side of the telescopic feeder 1, a movable roller shaft 6 is rotatably connected to the side of the telescopic plate 4, and a belt is provided at the roller body of the movable roller shaft 6. The distance between the telescopic conveyor body 5 and the telescopic feeder 1 is increased by extending the electric push rod 3, thereby increasing the feeding length of the belt, and the tobacco leaves are transported by the belt to the tobacco leaf sorting and grading position.

[0045] like Figure 3 and Figure 4 As shown, the auxiliary support part 7 includes a folding plate 77, and a tobacco diffuser 9 is arranged on the side of the folding plate 77. The tobacco diffuser 9 includes a docking shaft 91, a slider 92, a load-bearing spring 93, a transmission part, a circular plate 99, a column 910, a reciprocating ring 911, a supporting plate 912 and a diffusion rod 913. The end of the docking shaft 91 is rotatably connected to the slider 92, and the slider 92 slides on the folding plate 77. The two ends of the load-bearing spring 93 are respectively fixedly connected to the slider 92 and the folding plate 77.

[0046] A transmission part is set at the end of the docking shaft 91, and the transmission part includes a movable bevel gear 97 and a double-end gear plate 98. The end of the docking shaft 91 is fixedly connected to the movable bevel gear 97. When the bottom of the slider 92 contacts the magnetic block 95, the movable bevel gear 97 and the double-end gear plate 98 are meshed with each other. The middle part of the double-end gear plate 98 is rotatably connected to the folding plate 77, and the end of the double-end gear plate 98 is meshed with the circular plate 99 through gears.

[0047] A column 910 is fixedly installed on the plane of the docking shaft 91, and the arc surface of the column 910 contacts the reciprocating ring 911. A support plate 912 is fixedly installed on the top of the reciprocating ring 911, and a diffusion rod 913 is fixedly installed on the top of the support plate 912. The belt is hit by the diffusion rod 913. The support plate 912 slides up and down on the side of the folding plate 77, and the folding plate 77 guides the support plate 912. The top of the diffusion rod 913 contacts the belt, and the docking shaft 91 is fixedly installed on the end of the folding support roller 78.

[0048] like Figure 3 As shown, the slider 92 slides up and down inside the folding plate 77, and a magnetic block 95 and a support plate 94 are fixedly installed inside the folding plate 77. A central hole is opened at the center of the magnetic block 95, and a load-bearing spring 93 passes through the central hole and is fixedly connected to the support plate 94. When the slider 92 moves downward to the top of the magnetic block 95, the magnetic block 95 is used to limit the slider 92 to avoid excessive squeezing force between the slider 92 and the double-end gear disc 98. At the same time, the magnetic block 95 absorbs the slider 92, so that the movable bevel gear 97 at the end of the docking shaft 91 and the double-end gear disc 98 are stably engaged.

[0049] When tobacco leaves are unloaded on the belt, they are piled up together. The gravity of the piled tobacco leaves and the belt is greater than the elastic force of the load-bearing spring 93. The docking shaft 91 and the slider 92 move downward, that is, the movable bevel gear 97 moves downward, and the movable bevel gear 97 meshes with the double-end toothed disc 98, so that the circular plate 99 rotates. The circular plate 99 uses the column 910 to make the reciprocating ring 911 reciprocate up and down. The reciprocating ring 911 drives the supporting plate 912 and the diffusion rod 913 to reciprocate. The diffusion rod 913 hits the belt, and the diffusion rod 913 produces a bulge at the impact point of the column 910. The tobacco leaves spread around along the bulge position to separate the tobacco leaves. And because the tobacco leaf diffuser 9 is located at one end of the telescopic conveyor body 5 close to the tobacco leaf sorting and grading equipment, the diffusion rod 913 hits the belt to diffuse the accumulated tobacco leaves, avoiding tobacco leaf accumulation and reducing belt wear. At the same time, the tobacco leaf diffusion will facilitate tobacco leaf grading and sorting.

[0050] At the same time, during the downward movement of the movable bevel gear 97, the meshing positions of the movable bevel gear 97 and the double-end toothed disc 98 are different. The heavier the stacked tobacco leaves, the closer the meshing position of the movable bevel gear 97 and the double-end toothed disc 98 is to the center of the double-end toothed disc 98. When the rotation speed of the movable bevel gear 97 remains unchanged, the rotation speed of the double-end toothed disc 98 is faster. Therefore, the heavier the tobacco leaves, the higher the frequency of the diffusion rod 913 impacting the belt. Different frequencies of impact are performed according to the different weights of the stacked tobacco leaves.

[0051] like Figure 4As shown, a positioning spring sheet 96 is elastically connected to the inside of the folding plate 77 and at the bottom of the slider 92. An expansion groove is provided at the elastic connection between the folding plate 77 and the positioning spring sheet 96, and the end of the positioning spring sheet 96 is located in the expansion groove. The positioning spring sheet 96 is used to hold the slider 92 first. When the gravity of the tobacco leaves and the pressure of the belt are greater than the positioning spring sheet 96, the positioning spring sheet 96 is deformed, and the slider 92 moves downward. When the pressure from the tobacco leaves on the docking shaft 91 is small, the positioning spring sheet 96 supports the slider 92 to support the belt stably. When the pressure from the tobacco leaves on the docking shaft 91 is large, the slider 92 moves downward, so that the movable bevel gear 97 at the end of the docking shaft 91 docks with the double-end toothed disc 98, so that the diffusion rod 913 reciprocates.

[0052] When the weight of the accumulated tobacco leaves is greater than the supporting force applied by the positioning spring piece 96 and the load-bearing spring 93 to the slider 92, the slider 92 moves downward, and the movable bevel gear 97 engages with the double-end toothed disc 98. When the weight of the accumulated tobacco leaves is less than the supporting force applied by the positioning spring piece 96 and the load-bearing spring 93 to the slider 92, the position of the slider 92 remains unchanged, so that the movable bevel gear 97 and the double-end toothed disc 98 are staggered, avoiding the movable bevel gear and the double-end toothed disc 98 from engaging, causing the diffusion rod 913 to continuously impact the belt, causing the belt to deform and aggravate the damage to the belt.

[0053] In this embodiment, the tobacco leaves transported on the belt are gathered together, and the gravity of the tobacco leaves and the belt is greater than the elastic force of the load-bearing spring 93. The docking shaft 91 and the slider 92 move downward, that is, the movable bevel gear 97 moves downward, and the movable bevel gear 97 engages with the double-end toothed disc 98, so that the circular plate 99 rotates. The circular plate 99 uses the column 910 to make the reciprocating ring 911 reciprocate up and down, and the reciprocating ring 911 drives the supporting plate 912 and the diffusion rod 913 to reciprocate, and the diffusion rod 913 hits the belt. A bulge is generated at the impact point of the diffusion rod 913 on the belt, and the tobacco leaves spread around along the bulge to separate the tobacco leaves. Example

[0054] Based on Example 1, this embodiment proposes a telescopic feeding device for tobacco leaf sorting and grading, such as Figure 2 and Figure 6 As shown, a secondary support part 7 is provided between the telescopic feeder 1 and the telescopic plate 4, and the secondary support part 7 includes a telescopic frame 75, a folding plate 77, a folding support roller 78, a locking baffle 79, a limit baffle 710, a first coil spring 711, a wedge block 712 and a spiral spring 713. Both ends of the folding support roller 78 are rotatably connected to the folding plate 77, and the side of the folding plate 77 is rotatably connected to the telescopic frame 75. The first coil spring 711 is elastically connected between the folding plate 77 and the telescopic frame 75. When the telescopic conveyor body 5 moves, it uses the telescopic plate 4 to pull the telescopic frame 75, and the telescopic frame 75 is pulled out from the main support part 2. The telescopic frame 75 is rotatably connected to an intermediate shaft 76 in the frame, and the intermediate shaft 76 passes through the folding plate 77.

[0055] like Figure 2 and Figure 5 As shown, the telescopic frame 75 is fixedly connected to the telescopic plate 4, a plurality of folding support rollers 78 are provided, and are evenly distributed in a straight line in the inner frame of the telescopic frame 75, and the roller bodies of the folding support rollers 78 contact the belt.

[0056] When the folding plate 77 is located inside the main support part 2, the folding plate 77 is in a folded state, and the first coil spring 711 is in a compressed state; when the folding plate 77 is extended from the main support part 2, the first coil spring 711 restores its deformation, and the folding plate 77 and the folding support roller 78 support the belt. The folding support roller 78 is added to support the belt to avoid an increase in the conveying length, resulting in a concave condition in the middle of the belt. The tobacco leaves on the belt gather in the concave position, which aggravates the wear of the belt and increases the difficulty of grading the tobacco leaves.

[0057] like Figure 6 As shown, the inner frame of the telescopic frame 75 is fixedly installed with a limit baffle 710, the interior of the telescopic frame 75 is slidably connected to the locking baffle 79 and the wedge block 712, the side of the wedge block 712 is meshedly connected with a transmission gear 714, the transmission gear 714 is meshedly connected with a tooth plate 715, the interior of the telescopic frame 75 and located on the end extension line of the locking baffle 79 is fixedly installed with a first magnet 71, the interior of the telescopic frame 75 and located at the end position of the first magnet 71 is slidably connected with an insulating baffle 73, the end of the tooth plate 715 is fixedly connected to the insulating baffle 73, and second magnets 72 are fixedly installed on both sides of the locking baffle 79. The magnetic force of the second magnet 72 is smaller than that of the first magnet 71, and a rubber plate is fixedly installed between the locking baffle 79 and the second magnet 72, and the insulating baffle 73 is located between the locking baffle 79 and the first magnet 71.

[0058] When the telescopic frame 75 is extended, the folding plate 77 is extended from the main support part 2, and then the wedge block 712 is extended from the main support part 2. At this time, the elastic force of the coil spring 713 pops out the wedge block 712, and the wedge block 712 blocks the first magnet 71 through the conversion part so that the insulating baffle 73 blocks the first magnet 71. Under the magnetic force of the second magnet 72, the second magnet 72 moves away from the insulating baffle 73 and is adsorbed on the telescopic frame 75. At this time, the locking baffle 79 is extended from the telescopic frame 75. At this time, the locking baffle 79 and the limit baffle 710 are respectively located on both sides of the folding plate 77, thereby locking the position of the folding plate 77 so that it is always perpendicular to the horizontal plane.

[0059] When the telescopic frame 75 is retracted into the main support part 2, the wedge block 712 is squeezed by the main support part 2 and enters the interior of the telescopic frame 75. The wedge block 712 uses the transmission gear 714 to move the tooth plate 715, so that the insulating baffle 73 is separated from between the locking baffle 79 and the first magnet 71. The magnetic force of the first magnet 71 attracts the locking baffle 79, and because the magnetic force of the second magnet 72 is smaller than that of the first magnet 71, the locking baffle 79 moves toward the direction of the first magnet 71. At this time, the locking baffle 79 moves away from the side of the folding plate 77, unlocking the folding plate 77, and the main support part 2 pushes the folding plate 77 to compress the first coil spring 711. The folding plate 77 is folded and enters the main support part 2.

[0060] A roller 74 is rotatably connected to the receiving groove of the main support part 2 . The roller 74 and the intermediate shaft 76 are parallel to each other. The inclined surface of the wedge block 712 contacts the main support part 2 . The roller 74 reduces the friction between the main support part 2 and the folding plate 77 .

[0061] In this embodiment, the intermediate shaft 76 and the folding support roller 78 in the telescopic frame 75 are extended, and the folding plate 77 pops up under the elastic force of the first coil spring 711, so that the folding support roller 78 contacts the belt. The folding support roller 78 supports the belt to avoid the increase of the conveying length, and the middle part of the belt is concave. The tobacco leaves on the belt gather in the concave position, which increases the difficulty of grading the tobacco leaves. The locking baffle 79 is extended and cooperates with the limit baffle 710 to lock the position of the folding plate 77 to avoid displacement of the folding plate 77 after the folding support roller 78 is subjected to force. Example

[0062] Based on the above-mentioned embodiment 1 or 2, this embodiment proposes a telescopic feeding device for tobacco leaf sorting and grading, such as Figure 7 and Figure 8 As shown, a deviation correction member 8 is provided on the side of the telescopic conveyor body 5, and the deviation correction member 8 includes a synchronous plate 81, a docking end toothed disc 83, a transfer bevel gear 84, a deviation correction gear 85, a screw 86, an extension plate 87, a roller 88, a sleeve 813 and a driven roller 814. The docking end toothed disc 83 is fixedly installed at the bottom center of the synchronous plate 81, and the docking end toothed disc 83 is rotatably connected to the telescopic plate 4. The transfer bevel gear 84 is connected to the deviation correction gear 85 through a belt. The deviation correction gear 85 is rotatably connected to the telescopic conveyor body 5, and the docking end toothed disc 83 is connected to the deviation correction gear 85 through an intermediate member. The extension plate 87 is fixedly connected to the telescopic conveyor body 5, the middle part of the screw 86 is threadedly connected to the extension plate 87, the end of the screw 86 is meshedly connected to the deviation correction gear 85, and the end of the screw 86 is rotatably connected to the roller 88.

[0063] like Figure 8 and Fig.10As shown, an annular groove is formed at the end of the sleeve 813, and the roller 88 slides in the annular groove. The sleeve 813 is sleeved on the driven roller 814, and a convex strip is fixedly installed on the arc surface of the driven roller 814, and the middle part of the sleeve 813 contacts the belt. The convex strip on the driven roller 814 drives the sleeve 813 to rotate, and the driven roller 814 guides the sleeve 813. When the sleeve 813 rotates, the roller 88 rotates in the annular groove.

[0064] The screw 86 is rotated to change the position of the roller 88 at its end, and the roller 88 applies force to the sleeve 813, thereby changing the relative position of the sleeve 813 and the driven roller 814, and changing the position of the belt on the sleeve 813.

[0065] like Fig. 9 As shown, a notched rotating shaft 82 is fixedly installed at the bottom fixed center of the synchronous plate 81, and a separation block 810 is rotatably connected to the bottom of the notched rotating shaft 82. A second coil spring 811 is elastically connected between the notched rotating shaft 82 and the separation block 810. An adjustment slot is provided on the top of the telescopic plate 4. The separation block 810 slides left and right in the adjustment slot at the top of the telescopic plate 4. A return spring 812 is elastically connected between the separation block 810 and the telescopic plate 4. A positioning plug plate 89 is fixedly installed in the adjustment slot of the telescopic plate 4. The positioning plug plate 89 is clamped with the notched rotating shaft 82. When the notched rotating shaft 82 is separated from the positioning plug plate 89, the butt-end toothed disc 83 is meshed and connected with the deviation correction gear 85.

[0066] When the notched shaft 82 rotates, the second coil spring 811 is compressed. When the belt corrects the deviation, the belt no longer squeezes the synchronous plate 81. At this time, the elastic force of the second coil spring 811 resets the notched shaft 82, so that the notched shaft 82 is engaged with the positioning plug plate 89 again, so as to correct the deviation of the belt later.

[0067] In this embodiment, when the belt deviates, the notched rotating shaft 82 cannot be selected because the positioning plug plate 89 jams the notched rotating shaft 82. The belt pushes the notched rotating shaft 82 to move and separate from the positioning plug plate 89. At this time, the belt causes the notched rotating shaft 82 to rotate, that is, the butt end toothed disc 83 rotates. The butt end toothed disc 83 rotates and uses the adapter bevel gear 84 to rotate the correcting gear 85. The rotation of the correcting gear 85 causes the screw 86 to move. When the belt deviates in the direction of the screw 86, the correcting gear 85 drives the screw 86 to rotate forward. The screw 86 uses the roller 88 to push the sleeve 813 to correct the belt deviation. The belt deviates away from the screw 86, and the screw 86 reverses and uses the roller 88 to pull the sleeve 813 to correct the belt deviation.

[0068] A telescopic feeding method for tobacco leaf sorting and grading is applied to the telescopic feeding device for tobacco leaf sorting and grading, and the steps are as follows:

[0069] S1. Adjust the length: The electric push rod 3 is extended to move the telescopic conveyor body 5. The telescopic conveyor body 5 moves and the telescopic plate 4 is used to change the position of the movable roller shaft 6, thereby extending the distance between the telescopic feeder 1 and the telescopic conveyor body 5, thereby extending the conveying distance;

[0070] S2. Increase support: When extending the conveying distance, the telescopic plate 4 moves to pull the telescopic frame 75 out of the main support part 2, and the folding plate 77 and the folding support roller 78 in the telescopic frame 75 are pulled out, and the first coil spring 711 in the folded state bounces up the folding plate 77 and the folding support roller 78, and the folding support roller 78 contacts the belt;

[0071] S3, locked position: when the folding plate 77 extends from the main support part 2, the wedge block 712 extends from the main support part 2, and the elastic force of the coil spring 713 ejects the wedge block 712, and the wedge block 712 blocks the first magnet 71 through the insulating baffle 73 through the transmission gear 714 and the tooth plate 715. The second magnet 72 moves toward the telescopic frame 75 under the action of the magnetic force to extend the locking baffle 79, and the locking baffle 79 cooperates with the limit baffle 710 to lock the position of the folding plate 77;

[0072] S4, gathering and separation: When the tobacco leaves gather together, the gravity of the tobacco leaves and the belt is greater than the elastic force of the load-bearing spring 93, the docking shaft 91 and the slider 92 move downward, that is, the movable bevel gear 97 moves downward, and the movable bevel gear 97 meshes with the double-end gear plate 98, so that the circular plate 99 rotates, and the circular plate 99 uses the column 910 to make the reciprocating ring 911 and the diffusion rod 913 reciprocate up and down to separate the tobacco leaves;

[0073] S5. Offset correction: When the belt deviates in the direction of the screw 86, the deviation correction gear 85 drives the screw 86 to rotate forward, and the screw 86 uses the roller 88 to push the sleeve 813 to correct the belt deviation. The belt deviates away from the screw 86, and the screw 86 reverses and uses the roller 88 to pull the sleeve 813 to correct the belt deviation.

[0074] The above specific embodiments are only several optional embodiments of the present invention. Based on the technical solutions of the present invention and the relevant inspirations of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. A telescopic feeding device for tobacco leaf sorting and grading, comprising a telescopic feeding machine (1) and a main support part (2), characterized in that: The main support portion (2) is provided with a receiving groove, in which a secondary support portion (7) for supporting the belt of the elongated portion is slidably mounted, and further comprising: A tobacco leaf diffuser (9) capable of shaking a belt according to the degree of tobacco leaf accumulation on the belt, comprising a tobacco leaf diffuser (9) comprising a docking shaft (91), a slider (92), a load-bearing spring (93), a movable bevel gear (97), a double-end toothed disc (98), a transmission mechanism and a diffusion rod (913), wherein the end of the docking shaft (91) is rotatably connected to the slider (92), the load-bearing spring (93) is fixedly mounted on the bottom of the slider (92), the movable bevel gear (97) is fixedly mounted on the end of the docking shaft (91), when the slider (92) moves to a limit value, the double-end toothed disc (98) is meshedly connected with the movable bevel gear (97), a transmission mechanism is arranged at the end of the double-end toothed disc (98), a diffusion rod (913) is arranged on the top of the transmission mechanism, and the diffusion rod (913) is located below the belt of the extended portion; The secondary support portion (7) comprises a telescopic frame (75), a folding plate (77), a folding support roller (78), a first coil spring (711) and a position limiting component, wherein the telescopic frame (75) slides left and right inside the main support portion (2), the inner frame of the telescopic frame (75) is rotatably connected to the folding plate (77), the first coil spring (711) is elastically connected between the folding plate (77) and the telescopic frame (75), both ends of the folding support roller (78) are rotatably connected to the folding plate (77), the roller body of the folding support roller (78) contacts the belt, a plurality of folding support rollers (78) are provided, and are linearly and equidistantly distributed in the inner frame of the telescopic frame (75), the folding plate (77) is folded and arranged inside the main support portion (2), the first coil spring (711) is in a compressed state, and a position limiting component is provided on the telescopic frame (75), and the position limiting component is clamped with the folding plate (77); The slider (92) slides up and down on the side of the folding plate (77), the docking shaft (91) is fixedly mounted on the end of the folding support roller (78), and the bottom end of the load-bearing spring (93) is elastically connected to the folding plate (77).

2. The telescopic feeding device for tobacco leaf sorting and grading according to claim 1, characterized in that: The side of the folding plate (77) slides up and down, and the inside of the folding plate (77) is elastically connected to a positioning spring sheet (96) supporting the sliding block (92). An expansion groove is provided at the elastic connection between the folding plate (77) and the positioning spring sheet (96), and the end of the positioning spring sheet (96) is located in the expansion groove. The sliding block (92) slides up and down inside the folding plate (77). A magnetic block (95) and a supporting plate (94) are fixedly installed inside the folding plate (77). A central hole is provided at the center of the magnetic block (95), and the load-bearing spring (93) passes through the central hole and is fixedly connected to the supporting plate (94).

3. The telescopic feeding device for tobacco leaf sorting and grading according to claim 2 is characterized in that: The transmission part comprises a circular plate (99), a reciprocating ring (911) and a supporting plate (912); a bevel gear is coaxially connected to the center of the circular plate (99); the bevel gear is meshingly connected to a double-end gear plate (98); a column (910) offset from the center of the circular plate (99) is fixedly mounted on the plane of the circular plate (99); the arc surface of the column (910) contacts the reciprocating ring (911); the supporting plate (912) is fixedly mounted on the top of the reciprocating ring (911); a diffusion rod (913) is fixedly mounted on the top of the supporting plate (912); and the supporting plate (912) slides up and down on the side of the folding plate (77).

4. The telescopic feeding device for tobacco leaf sorting and grading according to claim 3 is characterized in that: The main support portion (2) is fixedly mounted on the telescopic feeder (1); an electric push rod (3) is fixedly mounted on the side of the telescopic feeder (1); a telescopic plate (4) is fixedly mounted on the end of the electric push rod (3); the telescopic frame (75) is fixedly connected to the telescopic plate (4); a deviation correction member (8) is provided on the side of the telescopic conveyor body (5); a limit assembly comprises a locking baffle (79) and a limit baffle (710); the limit baffle (710) is fixedly mounted in the telescopic frame (75); the interior of the telescopic frame (75) is slidably connected to the limit baffle (710); 10), the locking baffle (79) and the limiting baffle (710) clamp the folding plate (77), a first magnet (71) is fixedly installed inside the telescopic frame (75) and located on the end extension line of the locking baffle (79), an insulating baffle (73) is slidably connected inside the telescopic frame (75) and located at the end position of the first magnet (71), the insulating baffle (73) is located between the locking baffle (79) and the first magnet (71), and an intermediate shaft (76) is rotatably connected inside the telescopic frame (75), and the intermediate shaft (76) passes through the folding plate (77).

5. The telescopic feeding device for tobacco leaf sorting and grading according to claim 4, characterized in that: A wedge block (712) is slidably connected inside the telescopic frame (75), a coil spring (713) is elastically connected between the wedge block (712) and the telescopic frame (75), a side of the wedge block (712) is meshingly connected to a transmission gear (714), the transmission gear (714) is meshingly connected to a toothed plate (715), an end of the toothed plate (715) is fixedly connected to the insulating baffle (73), second magnets (72) are fixedly mounted on both sides of the locking baffle (79), the magnetic force of the second magnet (72) is smaller than the magnetic force of the first magnet (71), and a rubber plate is fixedly mounted between the locking baffle (79) and the second magnet (72).

6. A telescopic feeding device for tobacco leaf sorting and grading according to claim 5, characterized in that: The deviation correction member (8) comprises a synchronous plate (81), a butt-end toothed disc (83), a transfer bevel gear (84), a deviation correction gear (85), a screw (86), an extension plate (87), a roller (88), a sleeve (813) and a driven roller (814), wherein the butt-end toothed disc (83) is fixedly mounted at the bottom center of the synchronous plate (81), the butt-end toothed disc (83) is rotationally connected to the telescopic plate (4), the transfer bevel gear (84) is connected to the deviation correction gear (85) via a belt, the deviation correction gear (85) is rotationally connected to the telescopic conveyor body (5), and the butt-end toothed disc (83) is rotationally connected to the telescopic conveyor body (5) via a belt. The intermediate piece is connected to the deflection correction gear (85), the extension plate (87) is fixedly connected to the telescopic conveyor body (5), the middle part of the screw rod (86) is threadedly connected to the extension plate (87), the end of the screw rod (86) is meshedly connected to the deflection correction gear (85), the end of the screw rod (86) is rotatably connected to the roller (88), the end of the sleeve (813) is provided with an annular groove, the roller (88) slides in the annular groove, the sleeve (813) is sleeved on the driven roller (814), a convex strip is fixedly installed on the arc surface of the driven roller (814), and the middle part of the sleeve (813) contacts the belt.

7. A telescopic feeding device for tobacco leaf sorting and grading according to claim 6, characterized in that: A notched rotating shaft (82) is fixedly mounted at the fixed center of the bottom of the synchronous plate (81), a separation block (810) is rotatably connected to the bottom of the notched rotating shaft (82), a second coil spring (811) is elastically connected between the notched rotating shaft (82) and the separation block (810), an adjustment slot is provided at the top of the telescopic plate (4), the separation block (810) slides left and right in the adjustment slot at the top of the telescopic plate (4), a return spring (812) is elastically connected between the separation block (810) and the telescopic plate (4), a positioning plug plate (89) is fixedly mounted in the adjustment slot of the telescopic plate (4), the positioning plug plate (89) is clamped with the notched rotating shaft (82), and when the notched rotating shaft (82) is separated from the positioning plug plate (89), the butt-end toothed disc (83) is meshedly connected with the deviation correction gear (85).

8. The telescopic feeding device for tobacco leaf sorting and grading according to claim 7, characterized in that: A roller (74) is rotatably connected to the receiving groove of the main support part (2), the roller (74) and the intermediate shaft (76) are parallel to each other, the inclined surface of the wedge block (712) contacts the main support part (2), a telescopic conveyor body (5) is fixedly installed on the side of the telescopic plate (4), and a movable roller shaft (6) is rotatably connected to the side of the telescopic plate (4), and the belt sleeve is at the roller body of the movable roller shaft (6).

9. A telescopic feeding method for tobacco leaf sorting and grading, applied to a telescopic feeding device for tobacco leaf sorting and grading according to claim 8, comprising the following steps: S1. Adjusting the length: the electric push rod (3) is extended to move the telescopic conveyor body (5). The telescopic conveyor body (5) moves and the position of the movable roller shaft (6) is changed by using the telescopic plate (4), thereby extending the distance between the telescopic feeder (1) and the telescopic conveyor body (5), thereby extending the conveying distance; S2, increasing support: when extending the conveying distance, the telescopic plate (4) moves to draw the telescopic frame (75) out of the main support part (2), the folding plate (77) and the folding support roller (78) in the telescopic frame (75) are drawn out, the first coil spring (711) in the folded state bounces up the folding plate (77) and the folding support roller (78), and the folding support roller (78) contacts the belt; S3, locked position: the folding plate (77) extends from the main support portion (2), and then the wedge block (712) extends from the main support portion (2). At this time, the elastic force of the coil spring (713) ejects the wedge block (712), and the wedge block (712) causes the insulating baffle (73) to block the first magnet (71) through the transmission gear (714) and the toothed plate (715). The second magnet (72) moves toward the telescopic frame (75) under the action of the magnetic force, causing the locking baffle (79) to extend. The locking baffle (79) cooperates with the limit baffle (710) to lock the position of the folding plate (77); S4, gathering and separation: when the tobacco leaves are gathered together, the weight of the tobacco leaves and the belt is greater than the elastic force of the load-bearing spring (93), the docking shaft (91) and the slider (92) move downward, that is, the movable bevel gear (97) moves downward, and the movable bevel gear (97) meshes with the double-end gear plate (98), so that the circular plate (99) rotates, and the circular plate (99) uses the column (910) to make the reciprocating ring (911) and the diffusion rod (913) reciprocate up and down, so as to separate the tobacco leaves; S5, deviation correction: When the belt deviates in the direction of the screw rod (86), the deviation correction gear (85) drives the screw rod (86) to rotate forward, and the screw rod (86) uses the roller (88) to push the sleeve (813) to correct the deviation of the belt. When the belt deviates away from the screw rod (86), the screw rod (86) rotates reversely and uses the roller (88) to pull the sleeve (813) to correct the deviation of the belt.

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