Automatic speed regulating device for material pressing roller of quantitative tobacco feeding machine

Abstract

The utility model relates to the technical field of tobacco processing equipment, and discloses an automatic speed regulating device for a material pressing roller of a quantitative tobacco feeding machine, which comprises a rotating shaft, a mounting frame and a motor, the mounting frame is mounted on the outer side wall of a metering tube, the rotating shaft is rotatably mounted in the mounting frame, the motor is mounted on a support frame of an electronic belt scale, and the electronic belt scale is mounted on the rotating shaft. One end of the rotating shaft penetrates out of the mounting frame and is fixedly connected with the output end of the motor, the part, located in the mounting frame, of the rotating shaft is fixedly sleeved with a material pressing roller, a friction increasing unit is arranged on the material pressing roller, a cleaning assembly is arranged above the material pressing roller, and the cleaning assembly is used for cleaning the upper surface of the material pressing roller. The problems that in the prior art, due to the fact that a material pressing roller rotates in a passive mode, uneven material conveying is likely to be caused, and materials are likely to block a material channel formed among an outlet in the front side of a metering pipe, the metering pipe and an electronic belt scale are solved.

Description

Technical Field

[0001] This utility model relates to the field of tobacco processing equipment technology, and in particular to an automatic speed adjustment device for the pressing roller of a tobacco quantitative feeder. Background Technology

[0002] In cigarette production lines, a feeding system consisting of a feeder, a metering tube, and an electronic belt scale is commonly used to transport cigarette tobacco. The feeder conveys the material into the metering tube, from which it falls onto the electronic belt scale. The electronic belt scale then continues to transport the material to the next production stage, and its belt speed is related to the amount of material received. Height-adjustable pressure rollers are installed at the outlet of the metering tube and in the material channel between the metering tube and the electronic belt scale. These rollers control the incoming material flow and ensure smooth material transport.

[0003] The existing related technologies have the following technical defects: The working mode of the pressing roller on the electronic belt scale in the current tobacco processing production line is passive operation. The surface of the pressing roller is smooth, and the two ends of the pressing roller are mounted on the metering tube by bearings. The pressing roller rotates passively by relying on the friction after contacting the material. When the material enters the electronic belt scale, the upper and lower layers are subjected to opposite forces, and the flatness of the material surface exhibits a pulsed change with varying heights. After the tobacco leaves or shreds come into contact with the rotating electronic scale belt at the lower end of the metering tube / quantitative tube, the lower layer of material is conveyed at the same speed as the electronic scale belt. When the upper layer of material passes through the opening at the front of the metering tube, it comes into contact with the pressure roller, which is installed at the front of the metering tube without a drive device. The linear velocity of the electronic scale belt is transmitted to the surface of the pressure roller through the friction between the belt and the material, and the friction between the material and the pressure roller, causing the pressure roller to rotate. This results in the linear velocity of the pressure roller being out of sync with the linear velocity of the electronic scale belt, leading to uneven instantaneous flow of material entering the weighing area of ​​the electronic belt scale. That is, the flow rate is relatively stable over a period of time, but fluctuates within a short period of time. The frequency converter frequency is not relatively fixed, and the controller will repeatedly adjust the frequency, causing the electronic scale belt to speed up and slow down erratically. At the same time, the passive rotation of the pressure roller may cause untimely material output, and material accumulation inside the pressure roller may cause blockage. In this case, the pressure roller stops rotating, the material output is lower than the preset value, and material will also accumulate on the top of the pressure roller. From the perspective of the entire process, it has a significant impact on the subsequent key processing techniques such as adding ingredients, drying, and flavoring, and directly affects the quality of the finished tobacco. Utility Model Content

[0004] The purpose of this utility model is to provide an automatic speed adjustment device for the pressing roller of a tobacco quantitative feeder, so as to solve the problem that in the prior art, the pressing roller is passively rotated, which easily causes uneven material conveying and easy material blockage in the material channel formed by the front outlet of the metering tube and the metering tube and the electronic belt scale.

[0005] This utility model solves the above-mentioned technical problems through the following technical means:

[0006] An automatic speed control device for the pressing roller of a tobacco metering feeder includes a rotating shaft, a mounting frame, and a motor. The mounting frame is installed on the outer wall of the metering tube. The rotating shaft is rotatably installed inside the mounting frame. The motor is installed on the support frame of an electronic belt scale. One end of the rotating shaft extends out of the mounting frame and is fixedly connected to the output end of the motor. The portion of the rotating shaft located inside the mounting frame is fixedly fitted with a pressing roller. A friction-enhancing unit is provided on the pressing roller. A cleaning component is provided above the pressing roller for cleaning the upper surface of the pressing roller.

[0007] By setting the above structure, the motor drives the rotating shaft and the pressure roller to rotate, changing the pressure roller from passive to active. The rotation speed of the pressure roller can be matched with the feeding speed of the electronic belt scale. The friction-enhancing unit increases the friction between the pressure roller and the material, making the material discharge smoother and more uniform. The cleaning component can clean the material stuck on the surface of the pressure roller, ensuring that the friction-enhancing unit can stably perform its function.

[0008] Furthermore, the friction-enhancing unit includes a plurality of spiral grooves staggered on the surface of the pressure roller and a plurality of closely arranged rhomboid patterns formed by the plurality of staggered spiral grooves.

[0009] By setting up the above structure, the dense diamond pattern and spiral grooves can greatly increase the friction between the pressure roller and the material, so that the material can be output smoothly.

[0010] Furthermore, the cleaning assembly includes a cleaning rod and a brush. The cleaning rod is slidably mounted on the mounting frame and is located above the pressure roller. The axis of the cleaning rod is parallel to the axis of the pressure roller. The top of the brush is connected to the bottom of the cleaning rod, and the bottom of the brush is used to contact the upper surface of the pressure roller.

[0011] By setting the above structure, when the pressure roller squeezes and conveys the material, some of the material will get stuck in the spiral groove, thus affecting the performance of the friction enhancement unit. While the pressure roller is rotating, the brush cleans the upper surface of the pressure roller and cleans the material in the spiral groove.

[0012] Furthermore, a transmission assembly is provided between the cleaning rod and the rotating shaft. The transmission assembly is used to drive the cleaning rod to move axially. The transmission assembly includes a cam and a support rod. The cam is fixedly mounted on the rotating shaft. The top end of the support rod is fixed to the bottom of the cleaning rod, and a ball bearing is embedded at the bottom end. The ball bearing makes rolling contact with the surface of the cam.

[0013] By setting up the above structure, when the rotating shaft and pressure roller rotate, the transmission component causes the cleaning rod and brush to move along the axial direction of the pressure roller, further increasing the cleaning effect of the brush on the pressure roller.

[0014] Furthermore, a fixing ring is fixedly fitted onto the surface of the cleaning rod, and a spring is fitted onto the surface of the cleaning rod. One end of the spring is connected to the outer wall of the mounting frame, and the other end is connected to the fixing ring.

[0015] By setting up the above structure, the spring and the transmission component work together to make the cleaning rod and brush reciprocate along the axial direction of the pressure roller, ensuring the cleaning effect on the pressure roller.

[0016] Furthermore, the mounting frame is provided with a guide frame, the guide frame has a through hole for the cleaning rod to pass through, the surface of the cleaning rod has a keyway along the axial direction, and the inner wall of the through hole is provided with a guide key that matches the keyway.

[0017] By setting the above structure, the circumferential rotation of the cleaning rod is limited, so that the cleaning rod can only move in a straight line along the axial direction, thus ensuring the operational stability of the cleaning rod and the transmission components.

[0018] The beneficial effects of this utility model are as follows:

[0019] This technical solution incorporates a motor that actively drives the rotating shaft and pressure roller to rotate. The motor's speed matches the belt speed of the electronic belt scale, ensuring uniform material flow in the weighing area. The friction-enhancing unit increases the friction between the pressure roller and the material, resulting in smoother material discharge and less clogging. The cleaning component cleans the material stuck on the surface of the pressure roller, ensuring the friction-enhancing unit can function stably. Attached Figure Description

[0020] This utility model can be further illustrated by the non-limiting embodiments given in the accompanying drawings;

[0021] Figure 1 This is a schematic diagram of the installation structure of an automatic speed adjustment device for the pressing roller of a tobacco quantitative feeder on a metering tube according to this utility model.

[0022] Figure 2 yes Figure 1 A magnified structural diagram of point A in the middle.

[0023] Figure 3 This is a schematic diagram of the metering tube and electronic belt scale in this utility model.

[0024] Figure 4 This is a schematic diagram of the structure of an automatic speed adjustment device for the pressing roller of a tobacco quantitative feeder according to this utility model.

[0025] Figure 5 yes Figure 4 A structural diagram from another perspective.

[0026] Figure 6 yes Figure 5 A magnified structural diagram at point B in the middle.

[0027] In the above attached figures: 1. Measuring tube; 2. Front plate; 3. Electronic belt scale; 31. Belt; 32. Support frame; 4. Mounting frame; 5. Pressure roller; 6. Rotary shaft; 7. Spiral groove; 8. Motor; 9. Cam; 10. Support rod; 11. Ball bearing; 12. Cleaning rod; 13. Brush; 14. Guide frame; 15. Fixing ring; 16. Spring; 17. Long strip through groove; 18. Screw; 19. Locking nut; 20. Long strip clearance groove; 21. Clearance part; 22. Through hole; 23. Keyway; 24. Guide key. Detailed Implementation

[0028] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can understand the advantages and effects of this utility model from the content disclosed in this specification. It should be noted that the illustrations provided in the following embodiments are for illustrative purposes only and represent schematic diagrams, not actual pictures. They should not be construed as limiting the utility model. To better illustrate the embodiments of this utility model, some components in the figures may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable for those skilled in the art that some well-known mechanisms and their descriptions may be omitted in the figures.

[0029] In the figures of this utility model embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper", "lower", "left", "right", "front", "rear", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the figure, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the figures are only for illustrative purposes and should not be construed as limiting this utility model. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances. In the description of this application, terms such as "first", "second", etc. are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0030] like Figure 1-6As shown in the figure, this utility model embodiment proposes an automatic speed adjustment device for the pressing roller 5 of a tobacco quantitative feeder. This device is installed on the outer wall of the metering tube 1. In this embodiment, two front plates 2 are fixedly provided on the outer wall of the metering tube 1, and the two front plates 2 are located on both sides of the belt 31 of the electronic belt scale 3. The automatic speed adjustment device for the pressing roller 5 includes a rotating shaft 6, a mounting frame 4, and a motor 8. The mounting frame 4 is embedded between the two front plates 2. A fixing component is provided between the mounting frame 4 and the metering tube 1. The fixing component includes a screw 18 and a locking nut 19. A long strip-shaped through groove 17 is opened vertically on the side wall of the mounting frame 4 for the screw 18 to pass through and the fixed position of the screw 18 is adjustable. One end of the screw 18 is fixedly connected to the outer wall of the metering tube 1, and the other end passes through the long strip-shaped through groove 17 and cooperates with the locking nut 19 to lock and fix the mounting frame 4 and the metering tube 1. By tightening and loosening the locking nut 19, the vertical height of the mounting frame 4 and the pressing roller 5 can be adjusted. The rotating shaft 6 is installed horizontally within the mounting frame 4, with its axis perpendicular to the feeding direction of the electronic belt scale 3. The motor 8 is mounted on the support frame 32 of the electronic belt scale 3. In this embodiment, a bracket (not shown in the figure) is provided on the support frame 32 of the electronic belt scale 3. Correspondingly, the bracket can also be installed on the support frame 32 of the electronic belt scale 3 through a structure of a long through slot 17, a screw 18, and a locking nut 19, allowing the bracket to be adjusted vertically. The motor 8 is fixedly mounted on the bracket with bolts. One end of the rotating shaft 6 protrudes through the side wall of the mounting frame 4 and is fixedly connected to the output end of the motor 8. A pressure roller 5 is fixedly fitted onto the surface of the portion of the rotating shaft 6 located within the mounting frame 4. The surface of the pressure roller 5 is provided with a friction-enhancing unit, and a cleaning component is provided above the pressure roller 5 for cleaning the upper surface of the pressure roller 5. In this embodiment, a controller is also included. The drive unit of the electronic belt scale 3 and the motor 8 are electrically connected to the controller, which allows the rotation speed of the pressure roller 5 to match the running speed of the belt 31 of the electronic belt scale 3, ensuring the uniformity of material flow.

[0031] The friction-enhancing unit includes several staggered spiral grooves on the surface of the pressure roller 5 and several closely arranged rhomboid patterns formed by the staggered spiral grooves. The dense rhomboid patterns and spiral grooves 7 can greatly increase the friction between the pressure roller 5 and the material, so that the material is better squeezed by the pressure roller 5 and smoothly output, the material flow is uniform, and the material is less likely to be blocked.

[0032] The cleaning assembly includes a cleaning rod 12 and a brush 13. The cleaning rod 12 is slidably mounted on the mounting frame 4, positioned above the pressure roller 5. The axis of the cleaning rod 12 is parallel to the axis of the pressure roller 5. The top of the brush 13 is fixedly connected to the bottom of the cleaning rod 12, and the bottom of the brush 13 contacts the upper surface of the pressure roller 5. A row of brushes 13 is arranged along the axial direction of the cleaning rod 12, corresponding to the length of the pressure roller 5. In this embodiment, when the pressure roller 5 extrudes and conveys material, some material may become stuck in the spiral groove 7, affecting the performance of the friction-enhancing unit. As the pressure roller 5 rotates, the brush 13 cleans the upper surface of the pressure roller 5, removing the material from the spiral groove 7.

[0033] A transmission assembly is provided between the cleaning rod 12 and the rotating shaft 6. The transmission assembly is used to drive the cleaning rod 12 to move axially. The transmission assembly includes a cam 9 and a support rod 10. The cam 9 is fixedly mounted on the rotating shaft 6. The top end of the support rod 10 is fixed to the bottom of the cleaning rod 12. A ball bearing 11 is embedded at the bottom end of the support rod 10, and the ball bearing 11 makes rolling contact with the surface of the cam 9. A retaining ring 15 is fixedly mounted on the surface of the cleaning rod 12, and a spring 16 is mounted on the surface of the cleaning rod 12. One end of the spring 16 is fixedly connected to the outer wall of the mounting frame 4, and the other end is fixedly connected to the retaining ring 15. The spring 16 gives the cleaning rod 12 a tendency to move away from the cam 9. In this embodiment, when the rotating shaft 6 and the pressure roller 5 rotate, under the squeezing and limiting action of the cam 9 on the periodic reciprocating parts of the ball 11 and the support rod 10, and under the reset action of the spring 16, the cleaning rod 12 and the brush 13 reciprocate linearly along the axial direction of the pressure roller 5. The reciprocating linear motion of the brush 13 and the rotation of the pressure roller 5 itself enable the brush 13 to have a good cleaning effect on the surface of the pressure roller 5.

[0034] A guide frame 14 is fixedly installed on the mounting frame 4. The guide frame 14 has a through hole 22 for the cleaning rod 12 to pass through. A keyway 23 is formed on the surface of the cleaning rod 12 along the axial direction. A guide key 24 matching the keyway 23 is provided on the inner wall of the through hole 22. In this embodiment, under the cooperation of the guide key 24 and the axial keyway 23, the circumferential rotation of the cleaning rod 12 is limited, so that the cleaning rod 12 can only move linearly along the axial direction, ensuring the operational stability of the cleaning rod 12 and the transmission assembly.

[0035] In the above embodiments, to facilitate vertical height adjustment of the mounting frame 4 and the structural components mounted on it, the front plate 2 is provided with an elongated clearance slot and a clearance portion 21. The clearance portion 21 allows the rotating shaft 6 to move vertically with the mounting frame 4 without interfering with the front plate 2. The elongated clearance slot allows the spring 16, guide frame 14, and cleaning rod 12 to move vertically with the mounting frame 4 without interfering with the front plate 2. It should be understood that when adjusting the height of the mounting frame 4, the bracket supporting the motor 8 also needs to be adjusted accordingly.

[0036] Working principle:

[0037] The rotation of motor 8 drives the rotating shaft 6 and the pressure roller 5 to rotate. The rotation speed of the pressure roller 5 matches the rotation speed of the belt 31 of the electronic belt scale 3. The pressure roller 5 has high friction with the material, which allows the material to be smoothly squeezed and fed by the pressure roller 5. The material flow is uniform and the material is not easily blocked in the material channel. Since the material may get stuck in the spiral groove 7 on the surface of the pressure roller 5, the cam 9 rotates at the same time as the rotating shaft 6 rotates. The cam 9 periodically squeezes the ball 11. At the same time, under the reset action of the spring 16, the cleaning rod 12 and the brush 13 reciprocate linearly along the axial direction of the pressure roller 5. Combined with the rotational motion of the pressure roller 5 itself, the brush 13 can effectively clean the material stuck in the spiral groove 7. This application has a simple structure, reliable operation, low cost, and strong practicality.

[0038] The above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications and substitutions should be covered within the scope of the claims of this utility model. Technologies, shapes, and structural parts not described in detail in this utility model are all known technologies.

Claims

1. An automatic speed regulating device for the pressing roller of a tobacco metering feeder, installed on the outer wall of the metering tube, characterized in that: The system includes a rotating shaft, a mounting frame, and a motor. The mounting frame is installed on the outer wall of the metering tube. The rotating shaft is rotatably installed inside the mounting frame. The motor is installed on the support frame of the electronic belt scale. One end of the rotating shaft extends out of the mounting frame and is fixedly connected to the output end of the motor. A pressure roller is fixedly fitted on the portion of the rotating shaft located inside the mounting frame. A friction-enhancing unit is provided on the pressure roller. A cleaning component is provided above the pressure roller. The cleaning component is used to clean the upper surface of the pressure roller.

2. The automatic speed regulating device for the pressing roller of a tobacco quantitative feeder according to claim 1, characterized in that: The friction-enhancing unit includes several spiral grooves that are staggered on the surface of the pressure roller and several closely arranged diamond patterns formed by the staggered spiral grooves.

3. The automatic speed regulating device for the pressing roller of a tobacco quantitative feeder according to claim 1, characterized in that: The cleaning assembly includes a cleaning rod and a brush. The cleaning rod is slidably mounted on the mounting frame and is located above the pressure roller. The axis of the cleaning rod is parallel to the axis of the pressure roller. The top of the brush is connected to the bottom of the cleaning rod, and the bottom of the brush is used to contact the upper surface of the pressure roller.

4. The automatic speed regulating device for the pressing roller of a tobacco quantitative feeder according to claim 3, characterized in that: A transmission assembly is provided between the cleaning rod and the rotating shaft. The transmission assembly is used to drive the cleaning rod to move axially. The transmission assembly includes a cam and a support rod. The cam is fixedly mounted on the rotating shaft. The top end of the support rod is fixed to the bottom of the cleaning rod, and a ball bearing is embedded at the bottom end. The ball bearing makes rolling contact with the surface of the cam.

5. The automatic speed regulating device for the pressing roller of a tobacco quantitative feeder according to claim 3, characterized in that: A fixing ring is fixedly fitted onto the surface of the cleaning rod, and a spring is fitted onto the surface of the cleaning rod. One end of the spring is connected to the outer wall of the mounting frame, and the other end is connected to the fixing ring.

6. The automatic speed regulating device for the pressing roller of a tobacco quantitative feeder according to claim 3, characterized in that: The mounting frame is provided with a guide frame, and the guide frame has a through hole for the cleaning rod to pass through. The surface of the cleaning rod has a keyway along the axial direction, and the inner wall of the through hole is provided with a guide key that matches the keyway.

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