A device for removing stems from tobacco leaves after curing

Abstract

The utility model relates to the tobacco leaf baking processing technical field especially relates to a tobacco leaf after baking removes the device that prevents loss, including organism, the placing platform, the frame, the motor, the first transmission shaft and the first rolling disc etc. component, the body top fixedly connected with the placing platform, the body top symmetrical fixedly connected with the frame, the frame inside fixedly connected with the motor in one side, the output shaft fixedly connected with the first transmission shaft of the motor and penetrates the frame in one side, the first transmission shaft penetrates two frames, and the first transmission shaft rear part fixedly connected with the first rolling disc, the utility model discloses through the output shaft drive first transmission shaft and pinion synchronous rotation of the motor, and utilize the internal meshing relation of pinion and the big gear, power transmission to the second transmission shaft, make the first soft rubber ring and the second soft rubber ring form the rotation of the opposite and the existence speed difference, simulate the soft shearing force of manual tearing, accurate effect in the fragile separation layer of tobacco and tobacco stem connection, realize efficient separation.

Description

Technical Field

[0001] This utility model relates to the field of tobacco curing and processing technology, and in particular to a device for preventing damage after tobacco curing by removing stems. Background Technology

[0002] Tobacco is an important economic crop, primarily utilizing its leaves. After harvesting, processing (such as curing), fermentation, and grading, it is mainly used in the production of tobacco products such as cigarettes, cigars, and shredded tobacco. It is widely cultivated globally, with China being one of the major producers. Tobacco contains nicotine, an addictive alkaloid. Despite the significant economic value of the tobacco industry, smoking has been scientifically proven to be harmful to health and a major risk factor for many diseases.

[0003] In the tobacco processing flow, destemming after curing (or "bundle removal") is a crucial step in separating tobacco stems from leaves. Its efficiency and quality directly affect the final yield, integrity, and production cost of the tobacco shreds. Currently, it mainly relies on two methods: traditional manual tearing and mechanized destemming. Manual destemming depends entirely on manual operation, resulting in low efficiency and high labor intensity. Prolonged repetitive actions easily lead to worker fatigue, making large-scale continuous production difficult. Furthermore, the destemming effect is highly dependent on the worker's experience and skill, lacking standardized procedures, leading to high leaf breakage rates and large batch-to-batch quality fluctuations, failing to meet the stringent requirements of modern large-scale, standardized production. In contrast, while mechanized destemming equipment improves efficiency, its technical principles have significant flaws. Existing equipment is mostly designed based on principles such as kneading, beating, or high-speed pulling, applying forces that are often too concentrated, intense, and lack flexibility, failing to adapt to the dry, brittle, and fragile physical characteristics of cured tobacco leaves. This "violent separation" method is very likely to cause large-scale cracking or tearing of the leaves, producing a large amount of fine tobacco dust (shredded tobacco), which not only leads to a serious waste of valuable tobacco raw materials, but also significantly reduces the yield of finished tobacco shreds.

[0004] Therefore, it is necessary to design a device to prevent damage by removing stems after tobacco curing in order to solve the above-mentioned technical problems. Summary of the Invention

[0005] To overcome the shortcomings of manual destemming, such as low efficiency, high labor intensity, and unstable quality, which makes it difficult to meet the needs of large-scale production; and the disadvantages of mechanized destemming, such as its rough force, which easily damages tobacco leaves, resulting in high breakage rate, waste of raw materials and reduced yield, this utility model provides a device to prevent damage to tobacco leaves after destemming.

[0006] Technical Solution: A device for destemming and preventing damage after tobacco leaf curing, comprising a body, a placement platform, a frame, a motor, a first drive shaft, a first roller, a first soft rubber ring, a pinion, a short shaft, a large gear, a second drive shaft, a first drive wheel, a first belt, a second roller, a second soft rubber ring, and a conveying assembly. A placement platform is fixedly connected to the top of the body, and frames are symmetrically fixedly connected to the top of the body. A motor is fixedly connected inside one side of the frame, and the motor's output shaft passes through one side of the frame and is fixedly connected to the first drive shaft. The first drive shaft passes through both frames, and a first roller is fixedly connected to the rear of the first drive shaft. The machine has a first roller with a first soft rubber ring fixedly fitted on its exterior. A small gear is fixedly connected to one end of a first drive shaft that extends out of one side of the frame. A short shaft is rotatably connected to the front of one side of the frame. A large gear is fixedly fitted in the middle of the short shaft. The large gear meshes with the small gear. A second drive shaft is rotatably connected inside the machine body. A first drive wheel is fixedly connected to the front of the second drive shaft that extends out of the frame and the front of the short shaft. A first belt connects the two first drive wheels. A second roller is fixedly fitted on the exterior of the second drive shaft. A second soft rubber ring is fixedly fitted on the exterior of the second roller. A conveying assembly is provided inside the machine body.

[0007] In a preferred embodiment of the present invention, the first soft rubber ring is located above the second soft rubber ring, and the gap formed between the first soft rubber ring and the second soft rubber ring is smaller than the thickness of the tobacco stem.

[0008] In a preferred embodiment of this invention, the large gear has more teeth than the small gear.

[0009] In a preferred embodiment of the present invention, the conveying assembly includes rollers, conveyor belts, second drive wheels, and second belts. Rollers are rotatably connected to both sides inside the machine body. Conveyor belts are wound around both sides between the two rollers. A second roller is located between the two conveyor belts. The front part of the second drive shaft and one end of the front part of one of the rollers protruding from the machine body are fixedly connected to the second drive wheel. A second belt is wound between the two second drive wheels.

[0010] In a preferred embodiment of this utility model, the gap between the two conveyor belts is equal to the width of the second roller, and multiple anti-slip grooves are provided on the outer surfaces of the two conveyor belts.

[0011] In a preferred embodiment of the present invention, the first belt and the second belt are staggered.

[0012] In a preferred embodiment of this utility model, it further includes a mounting plate, a connecting rod, a roller, a third soft rubber ring, and a torsion spring. Mounting plates are fixedly connected to both sides of the top of the frame. Connecting rods are rotatably connected to both sides of the two mounting plates. Rollers are rotatably connected to one end of the two connecting rods on the same side. A third soft rubber ring is fixedly sleeved on the outside of each roller. The outside of the two third soft rubber rings on the same side makes rolling contact with the corresponding conveyor belt surface. A torsion spring is connected between each connecting rod and the corresponding mounting plate.

[0013] In a preferred embodiment of this utility model, the first soft rubber ring, the second soft rubber ring, and the third soft rubber ring are all made of soft and deformable material.

[0014] In a preferred embodiment of this utility model, it further includes a first storage frame, a cutting blade, a baffle, and a second storage frame. The first storage frame is fixedly connected to the left side of the machine body, and the cutting blade is symmetrically fixedly connected to the right side of the first storage frame. The two cutting blades are respectively located on the left side of the second roller and between the two conveyor belts. The baffle is fixedly connected to the top of the first storage frame. The second storage frames are fixedly connected to both sides of the left side of the machine frame. The first storage frame is located between the two second storage frames. The two second storage frames are located on the left side of the corresponding conveyor belts. The left side of the first storage frame and the two second storage frames are provided with a pick-up slot.

[0015] Beneficial effects: 1. This utility model drives the first transmission shaft and the small gear to rotate synchronously through the output shaft of the motor. By utilizing the internal meshing relationship between the small gear and the large gear, the power is transmitted to the second transmission shaft, so that the first soft rubber ring and the second soft rubber ring rotate in opposite directions with a speed difference. This simulates the gentle shearing force of manual tearing and precisely acts on the fragile abscission layer connecting the tobacco leaf and the tobacco stem, achieving efficient separation. This effectively solves the problem that mechanical destemming is too forceful and easily leads to a high tobacco leaf breakage rate. While improving destemming efficiency, it significantly reduces raw material loss and ensures the integrity of the tobacco leaf and the yield of finished products.

[0016] 2. This utility model drives the roller shaft and conveyor belt synchronously via the second transmission shaft and the second belt to stably transport the separated tobacco leaves to the left. At the same time, the torsion spring keeps the third soft rubber ring pressed against the leaf surface, forming a flexible pressing mechanism. This enhances the stability of the tobacco leaves during the transport process, prevents them from bouncing or deviating, and further avoids leaf breakage caused by collisions and friction during the transport process, ensuring the integrity of the tobacco leaves after destemming.

[0017] 3. This utility model uses a cutting blade to cut and clean the small, sticky leaves that are not completely separated during the conveying process, thereby improving the purity of the tobacco stems. The first and second collection frames are used to classify and collect the separated tobacco stems and leaves respectively. Operators can easily pick up and put them in through the retrieval slot, which realizes the efficient sorting and collection of tobacco leaves and stems, optimizes the production process, and improves the overall cleanliness and efficiency of the operation. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0019] Figure 2 This is a three-dimensional structural diagram of the frame, motor, and first transmission shaft of this utility model.

[0020] Figure 3 This is a three-dimensional structural diagram of the first roller, the first soft rubber ring, and the pinion gear of this utility model.

[0021] Figure 4 This is a three-dimensional structural diagram of the first belt, second roller, and second soft rubber ring of this utility model.

[0022] Figure 5 This is a three-dimensional structural diagram of the main body, the second transmission wheel, and the second belt of this utility model.

[0023] Figure 6 This is a three-dimensional structural diagram of the connecting rod, roller, and third soft rubber ring of this utility model.

[0024] Figure 7 This is a three-dimensional structural diagram of the mounting plate, connecting rod, rollers, and other components of this utility model.

[0025] Figure 8 This is a three-dimensional structural diagram of the first storage frame, cutting blade, and baffle of this utility model.

[0026] Figure 9 This is a three-dimensional structural diagram of the cutting blade, baffle, and second storage frame of this utility model.

[0027] The components in the attached diagram are labeled as follows: 1. Machine body; 101. Placement platform; 2. Machine frame; 3. Motor; 4. First drive shaft; 5. First roller; 6. First soft rubber ring; 7. Small gear; 8. Short shaft; 9. Large gear; 10. Roller; 11. Conveyor belt; 12. Second drive shaft; 13. First drive wheel; 14. First belt; 15. Second roller; 16. Second soft rubber ring; 17. Second drive wheel; 18. Second belt; 19. Mounting plate; 20. Connecting rod; 21. Roller; 22. Third soft rubber ring; 23. Torsion spring; 24. First storage frame; 25. Cutting blade; 26. Baffle; 27. Second storage frame. Detailed Implementation

[0028] Example: A device for preventing damage after tobacco leaf curing by removing stems, such as... Figures 1-9As shown, the machine includes an organism 1, a placement platform 101, a frame 2, a motor 3, a first drive shaft 4, a first roller 5, a first soft rubber ring 6, a pinion 7, a short shaft 8, a large gear 9, a second drive shaft 12, a first drive wheel 13, a first belt 14, a second roller 15, a second soft rubber ring 16, a roller 10, a conveyor belt 11, a second drive wheel 17, and a second belt 18. The placement platform 101 is welded to the top right side of the machine body 1. A frame 2 is symmetrically mounted on the top center of the machine body 1 using screws. The motor 3 is mounted inside the rear frame 2 using screws. The output axis of the motor 3 extends to the right. A first drive shaft 4 extends through the rear frame 2 and is connected to both frames 2 via a coupling. A first roller 5 is screwed onto the outer rear part of the first drive shaft 4. A first soft rubber ring 6, made of a flexible and deformable material, is glued to the outer surface of the first roller 5. A small gear 7 is screwed onto one end of the first drive shaft 4 that extends out of the front frame 2. A short shaft 8 is rotatably connected to the front side of the front frame 2. A large gear 9 is screwed onto the outer middle part of the short shaft 8. The large gear 9 meshes with the small gear 7, and the large gear 9 has more teeth than the small gear 7. The gear 7 has a number of teeth. A second drive shaft 12 is rotatably connected inside the machine body 1. The front end of the second drive shaft 12 extends through the frame 2 and the front end of the short shaft 8, and a first drive wheel 13 is mounted to it via screws. A first belt 14 connects the two first drive wheels 13. A second roller 15 is mounted to the outer side of the middle of the second drive shaft 12 via screws. A second soft rubber ring 16 is glued to the outer side of the second roller 15. The second soft rubber ring 16 is made of a soft, deformable material. The first soft rubber ring 6 is located directly above the second soft rubber ring 16. The gap between the first soft rubber ring 6 and the second soft rubber ring 16 is smaller than that of a tobacco stem. The thickness is such that rollers 10 are rotatably connected to both the left and right sides inside the machine body 1. Conveyor belts 11 are wound around the front and rear sides between the two rollers 10. The gap between the two conveyor belts 11 is equal to the width of the second roller 15. Multiple anti-slip grooves are opened on the outer surface of the two conveyor belts 11. The second roller 15 is located between the two conveyor belts 11. The front end of the second drive shaft 12 and the front end of the roller 10 on the right side that protrude from the machine body 1 are both equipped with second drive wheels 17 by screws. A second belt 18 is wound between the two second drive wheels 17. The first belt 14 and the second belt 18 are distributed alternately front and back.

[0029] like Figure 1 , Figure 6 and Figure 7As shown, it also includes mounting plates 19, connecting rods 20, rollers 21, third soft rubber rings 22, and torsion springs 23. Mounting plates 19 are welded to the front and rear sides of the top of the frame 2. Connecting rods 20 are rotatably connected to the left and right sides of the two mounting plates 19. Rollers 21 are rotatably connected to the ends of the two connecting rods 20 on the same front and rear sides away from the corresponding mounting plates 19. A third soft rubber ring 22 is glued to the outer side of each roller 21. The third soft rubber rings 22 are all made of soft and deformable material. The outer sides of the two third soft rubber rings 22 on the same front and rear sides are in rolling contact with the surface of the corresponding conveyor belt 11. A torsion spring 23 is connected between each connecting rod 20 and the corresponding mounting plate 19.

[0030] like Figure 1 , Figure 6 , Figure 8 and Figure 9 As shown, it also includes a first storage frame 24, a cutting blade 25, a baffle 26, and a second storage frame 27. The first storage frame 24 is welded to the middle of the left side of the machine body 1. The cutting blades 25 are symmetrically welded to the front and back of the right side of the first storage frame 24. The two cutting blades 25 are located on the left side of the second roller 15 and between the two conveyor belts 11. The baffle 26 is welded to the top of the first storage frame 24. The second storage frames 27 are welded to both the front and back sides of the left side of the frame 2. The first storage frame 24 is located between the two second storage frames 27. The two second storage frames 27 are located on the left side of the corresponding conveyor belt 11. The first storage frame 24 and the two second storage frames 27 are provided with a retrieval slot on their left side.

[0031] When this device is needed to destem cured tobacco leaves, the operator first lays the tobacco leaves to be processed flat on the top of the placement platform 101 with the stems facing left and the leaves facing right. Then, the motor 3 is started. The output shaft of the motor 3 drives the first transmission shaft 4 to rotate clockwise. The first transmission shaft 4 directly drives the first roller 5 and the first soft rubber ring 6 on it to rotate synchronously. At the same time, the small gear 7 rotates accordingly. Since the small gear 7 meshes with the large gear 9, the large gear 9 rotates counterclockwise at a speed lower than that of the small gear 7. The large gear 9 passes through the short shaft The first drive wheel 13 at the front end of the short shaft 8 rotates counterclockwise at a low speed. The first drive wheel 13 on the short shaft 8, through the transmission of the first belt 14, drives the first drive wheel 13 at the front end of the second drive shaft 12 and the second drive shaft 12 itself to rotate counterclockwise. The second drive shaft 12 then drives the second roller 15 and the second soft rubber ring 16 on it to rotate counterclockwise. Because the large gear 9 has more teeth than the small gear 7, a speed reduction and torque increase transmission is formed, resulting in the speed of the second drive shaft 12 being lower than the speed of the first drive shaft 4. Therefore, the first soft rubber ring 6 located above rotates clockwise, while the second soft rubber ring 16 located below rotates counterclockwise, forming a pair of opposing rotating compression rollers with a speed difference. The first soft rubber ring 6 rotates at a higher speed than the second soft rubber ring 16. The operator feeds the tobacco stem portion of the tobacco leaf on the placement table 101 from left to right into the gap between the first soft rubber ring 6 and the second soft rubber ring 16. Since the gap is smaller than the thickness of the tobacco stem, the tobacco stem is squeezed by the first soft rubber ring 6 and the second soft rubber ring 16 as it passes through. More importantly, the gentle shearing force generated by the speed difference between the first soft rubber ring 6 and the second soft rubber ring 16 acts precisely on the fragile delamination area where the tobacco leaf and the tobacco stem are connected, thus simulating the action of manual tearing. This effectively separates the leaf and the tobacco stem completely at this point, while avoiding the breakage of the leaf itself. The separated tobacco stem continues to move to the left side of the device as the first soft rubber ring 6 and the second soft rubber ring 16 rotate, eventually escaping from the compression area.

[0032] Meanwhile, when the second drive shaft 12 rotates counterclockwise, the second drive wheel 17 of the second drive shaft 12 transmits power to the second drive wheel 17 at the front end of the right roller shaft 10 through the transmission of the second belt 18, thereby driving the two roller shafts 10 to rotate counterclockwise together. The two conveyor belts 11 wrapped around the two roller shafts 10 thus operate synchronously, and their running direction is to transport the tobacco leaves they carry from right to left. The second roller 15 is exactly located in the gap between the two conveyor belts 11. After the two blades are squeezed and separated, after they are separated from the second soft rubber ring 16, the two blades will naturally fall onto the two conveyor belts 11 and be stably transported to the left.

[0033] To further ensure a smooth conveying process and prevent tobacco stems from bouncing or shifting, the third soft rubber ring 22 is always pressed tightly against the surface of the conveyor belt 11 below under the elastic force of the torsion spring 23. As it rolls, it forms a flexible holding mechanism. When the tobacco leaves are conveyed to the left and right sides of the second roller 15, the tobacco leaves will contact the third soft rubber ring 22 respectively, which enhances the stability of the tobacco leaf conveying. The tobacco leaves sent out by the conveyor belt 11 can be cut off by two cutting blades 25 to cut off the small leaves that are stuck together and not completely separated, ensuring the purity of the tobacco stems. Finally, the pure tobacco stems that have been completely separated and cleaned will fall into the first collection frame 24, while the leaves that have been completely separated will be collected in the second collection frame 27. Then, the leaf stems and leaves can be taken out separately through the picking slot. After the separation operation is completed, the motor 3 is turned off, and all moving parts stop rotating in sequence.

Claims

1. A device for preventing damage after tobacco leaf curing by removing stems, characterized in that, The machine includes an organism (1), a placement platform (101), a frame (2), a motor (3), a first drive shaft (4), a first roller (5), a first soft rubber ring (6), a pinion (7), a short shaft (8), a large gear (9), a second drive shaft (12), a first drive wheel (13), a first belt (14), a second roller (15), a second soft rubber ring (16), and a conveying assembly. The placement platform (101) is fixedly connected to the top of the machine body (1). The frame (2) is symmetrically fixedly connected to the top of the machine body (1). A motor (3) is fixedly connected inside one side of the frame (2). The output shaft of the motor (3) passes through one side of the frame (2) and is fixedly connected to the first drive shaft (4). The first drive shaft (4) passes through both frames (2). The first roller (5) is fixedly connected to the rear of the first drive shaft (4). A first soft rubber ring (6) is fixedly fitted on the outside of a roller (5). A small gear (7) is fixedly connected to one end of a first drive shaft (4) that passes through one side of the frame (2). A short shaft (8) is rotatably connected to the front of one side of the frame (2). A large gear (9) is fixedly fitted in the middle of the short shaft (8). The large gear (9) meshes with the small gear (7). A second drive shaft (12) is rotatably connected inside the machine body (1). A first drive wheel (13) is fixedly connected to the front of the second drive shaft (12) that passes through the frame (2) and the front of the short shaft (8). A first belt (14) is connected between the two first drive wheels (13). A second roller (15) is fixedly fitted on the outside of the middle of the second drive shaft (12). A second soft rubber ring (16) is fixedly fitted on the outside of the second roller (15). A conveying assembly is provided inside the machine body (1).

2. The tobacco leaf destemming and damage prevention device according to claim 1, characterized in that, The first soft rubber ring (6) is located above the second soft rubber ring (16), and the gap formed between the first soft rubber ring (6) and the second soft rubber ring (16) is smaller than the thickness of the tobacco stem.

3. A device for preventing damage after tobacco leaf curing by removing stems, as described in claim 2, is characterized in that... The large gear (9) has more teeth than the small gear (7).

4. A device for preventing damage after tobacco leaf curing by removing stems according to claim 3, characterized in that, The conveying assembly includes a roller (10), a conveyor belt (11), a second drive wheel (17), and a second belt (18). The roller (10) is rotatably connected to both sides inside the machine body (1). The conveyor belt (11) is wound around both sides between the two rollers (10). The second roller (15) is located between the two conveyor belts (11). The front part of the second drive shaft (12) and the front end of the roller (10) on one side of the machine body (1) are fixedly connected to the second drive wheel (17). The second belt (18) is wound between the two second drive wheels (17).

5. A device for preventing damage after tobacco leaf curing by removing stems according to claim 4, characterized in that, The gap between the two conveyor belts (11) is equal to the width of the second roller (15), and multiple anti-slip grooves are provided on the outer surface of the two conveyor belts (11).

6. A device for preventing damage after tobacco leaf curing by removing stems according to claim 5, characterized in that, The first belt (14) and the second belt (18) are staggered.

7. A device for preventing damage after tobacco leaf curing by removing stems according to claim 6, characterized in that, It also includes mounting plates (19), connecting rods (20), rollers (21), third soft rubber rings (22) and torsion springs (23). Mounting plates (19) are fixedly connected to both sides of the top of the frame (2). Connecting rods (20) are rotatably connected to both sides of the two mounting plates (19). Rollers (21) are rotatably connected to one end of the two connecting rods (20) on the same side. A third soft rubber ring (22) is fixedly fitted on the outside of each roller (21). The outside of the two third soft rubber rings (22) on the same side rolls in contact with the surface of the corresponding conveyor belt (11). A torsion spring (23) is connected between each connecting rod (20) and the corresponding mounting plate (19).

8. A device for preventing damage after tobacco leaf curing by removing stems according to claim 7, characterized in that, The first soft rubber ring (6), the second soft rubber ring (16), and the third soft rubber ring (22) are all made of soft and deformable material.

9. A device for preventing damage after tobacco leaf curing by removing stems according to claim 8, characterized in that, It also includes a first storage frame (24), a cutting blade (25), a baffle (26), and a second storage frame (27). The first storage frame (24) is fixedly connected to the left side of the machine body (1). The cutting blade (25) is symmetrically fixedly connected to the right side of the first storage frame (24). The two cutting blades (25) are located on the left side of the second roller (15) and between the two conveyor belts (11). The baffle (26) is fixedly connected to the top of the first storage frame (24). The second storage frames (27) are fixedly connected to both sides of the left side of the frame (2). The first storage frame (24) is located between the two second storage frames (27). The two second storage frames (27) are located on the left side of the corresponding conveyor belts (11). The first storage frame (24) and the two second storage frames (27) are all provided with a retrieval slot on the left side.

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