Tobacco shred screening device

Abstract

The utility model belongs to the technical field of cigarette production equipment, and particularly relates to a tobacco shred screening device which comprises two wallboards arranged oppositely and a plurality of screening rollers installed between the two wallboards and arranged side by side in parallel. A fixing hole and a sliding groove extending to the other end in the length direction of the wall plate are formed in one end of the wall plate. The screening roller at the head end of the multiple screening rollers arranged side by side in parallel is rotationally connected with the fixing hole through a screening shaft, and the remaining screening rollers are slidably connected with the sliding groove through screening shafts. A shear type telescopic adjusting structure is arranged on the outer side of the wall plate, the shear type telescopic adjusting structure comprises a plurality of connecting plates which are hinged in a crossed mode, and the corresponding screening shafts are sequentially sleeved with hinge holes in the middles of the connecting plates in the length direction of the wall plate; according to the tobacco shred screening device, the distance between every two adjacent screening rollers is flexibly adjusted through the arranged shear type telescopic adjusting structures, so that the tobacco shred screening device can meet the screening requirements of tobacco shreds with different lengths.

Description

Technical Field

[0001] This utility model belongs to the technical field of cigarette production equipment, specifically relating to a tobacco shred screening device. Background Technology

[0002] During cigarette manufacturing, tobacco shreds are screened to separate them into different lengths. Conventional screening machines use a vibrating screen principle. The tobacco shreds fall onto a sorting plate at the feed end. The plate conveys larger shreds forward, while smaller shreds and tobacco dust fall onto a vibrating screen below, where they are further separated. This vibrating screening method has relatively low efficiency and is susceptible to clogging of the screen openings by accumulated tobacco shreds.

[0003] The prior art discloses a tobacco shredding device (publication number: CN 204888710 U), which includes a support frame and multiple parallel rollers arranged on the support frame. Each roller is driven by a motor to rotate in the same direction, and the rotating rollers throw and separate the tobacco shredding. This structure makes it inconvenient to adjust the distance between two adjacent rollers, and it is not convenient to adapt to the shredding requirements of tobacco shredding of different lengths. It is necessary to improve the tobacco shredding device. Utility Model Content

[0004] The purpose of this invention is to provide a tobacco shred screening device that can flexibly adjust the gap between each screening roller through a scissor-type telescopic adjustment structure, so that tobacco shreds of different lengths fall from different gaps; adapting to the screening of tobacco shreds of different lengths; and solving the problems mentioned in the background art.

[0005] To achieve the above-mentioned technical objectives, the technical solution adopted by this utility model is as follows:

[0006] A tobacco shred screening device includes two opposing wall panels and multiple parallel screening rollers installed between the two wall panels. One end of each wall panel has a fixing hole and a sliding groove extending along its length to the other end. The first screening roller of the parallel screening rollers is rotatably connected to the fixing hole via a screening shaft, while the remaining screening rollers are slidably connected to the sliding groove via the screening shaft. A scissor-type telescopic adjustment structure is provided on the outer side of each wall panel. The scissor-type telescopic adjustment structure includes several cross-hinged connecting plates, with hinge holes in the middle of each connecting plate sequentially sleeved onto the corresponding screening shaft along the length of the wall panel. All screening shafts on the same side are connected to a drive structure for driving all screening rollers to rotate in the same direction. An actuator is installed on the outer side of the other end of each wall panel, connected to an adjacent connecting plate, for driving the scissor-type telescopic adjustment structure to extend and retract, thereby adjusting the distance between any two adjacent screening rollers. The scissor-type telescopic adjustment structure allows for flexible adjustment of the distance between any two adjacent screening rollers, thus meeting the screening requirements of tobacco shreds of different lengths and improving the practicality of the device. The drive structure enables all screening shafts to be driven in the same direction, thereby achieving unidirectional drive of all screening rollers. This allows the screening rollers to efficiently utilize the energy required for drive while screening the tobacco shreds, improving the power utilization rate of the device.

[0007] Furthermore, the actuator includes an electric push rod and a movable block. The electric push rod is fixedly mounted on the wall panel, and its telescopic end is connected to the movable block. The movable block is connected to the adjacent connecting plate via a movable plate. This actuator enables the telescopic drive of the scissor-type telescopic adjustment structure; it is compact and highly practical.

[0008] Furthermore, the movable block is slidably connected to the sliding groove on the side near the wall panel, and the sliding groove guides the movable block when it moves.

[0009] Furthermore, the drive structure includes a drive motor, a drive wheel, a driven wheel, a rotating wheel, a support wheel, and a drive belt; the drive motor is connected to the drive wheel; the drive wheel is mounted on the screening shaft corresponding to the fixed hole, and a plurality of the rotating wheels are mounted on the remaining screening shaft; a plurality of the support wheels are coaxially mounted on a portion of the hinge holes at both ends of the connecting plate; a plurality of the driven wheels are coaxially mounted on another portion of the hinge holes at both ends of the connecting plate; the drive belt is wound around the drive wheel, the rotating wheel, the support wheel, and the driven wheel in a specified order.

[0010] Furthermore, some of the passive wheels are configured as tension adjusting wheels, which adjust the tension of the drive belt. A mounting bracket is connected to the outer side of the wall panel to protect the drive structure; limit holes are machined on the mounting bracket, and the outer end of the rotating wheel's shaft is rotatably mounted on the corresponding limit holes.

[0011] Furthermore, the actuator is equipped with another drive motor, the output end of which is equipped with another drive wheel. This drive wheel is connected to an intermediate wheel, which is coaxially mounted on the lower hinge hole of the connecting plate adjacent to the actuator.

[0012] Furthermore, the screening roller includes a roller body and shoulder portions axially spaced on the outer peripheral surface of the roller body, with the shoulder portions of adjacent screening rollers being staggered. This allows adjacent screening rollers to interlock, forming a rectangular wavy gap between them, ensuring that fine tobacco shreds fall off while preventing long tobacco shreds from falling off, effectively improving the screening efficiency.

[0013] Furthermore, the roller body and the shoulder portion are cylindrical or regular polygonal cylinders.

[0014] The utility model adopting the above technical solution has the following advantages:

[0015] In this application, when the tobacco shreds are sieved using the sieve rollers, the drive structure drives all the sieve rollers in the same direction, enabling the sieve rollers to sieve the tobacco shreds. The spacing between any two adjacent sieve rollers can be flexibly adjusted by the scissor-type telescopic adjustment structure, thereby meeting the sieve requirements of tobacco shreds of different lengths and improving the practicality of the device. By driving all the sieve shafts in the same direction through the drive structure, the energy required for the drive is utilized efficiently, improving the power utilization rate of the device. Attached Figure Description

[0016] This utility model can be further illustrated by the non-limiting embodiments given in the accompanying drawings;

[0017] Figure 1 This is one of the structural schematic diagrams of an embodiment of the tobacco shred screening device of this utility model;

[0018] Figure 2 This is a front view schematic diagram of an embodiment of the tobacco shred sorting device of this utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the screening shaft in an embodiment of the present invention;

[0020] Figure 4 This is one of the structural schematic diagrams of the screening roller in the embodiments of this utility model;

[0021] Figure 5This is the second schematic diagram of the structure of the screening roller in the embodiment of this utility model;

[0022] Figure 6 This is a second schematic diagram of an embodiment of the tobacco shred screening device of this utility model;

[0023] Figure 7 This is a partial front view schematic diagram of an embodiment of a tobacco shred sorting device according to the present invention;

[0024] Figure 8 This is one of the schematic diagrams of the driving structure in the embodiments of this utility model;

[0025] Figure 9 This is a second schematic diagram of the driving structure according to an embodiment of the present utility model;

[0026] The symbols for the main components are explained below:

[0027] 100. Wall panel; 101. Sliding groove; 102. Fixing hole; 103. Screening shaft; 200. Screening roller; 201. First end screening roller; 202. Second screening roller; 203. End screening roller; 300. Scissor-type telescopic adjustment structure; 301. Connecting plate; 302. First hinge hole; 303. Second hinge hole; 304. End connection hole; 305. Movable plate; 306. Electric push rod; 307. Telescopic end; 308. Movable block; 310. Mounting frame; 311. Drive wheel; 312. Tension adjusting wheel; 313. Drive belt; 314. Passive wheel; 315. First support wheel; 316. Second support wheel; 317. Rotating wheel. Detailed Implementation

[0028] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that similar or identical parts are referred to by the same reference numerals in the drawings or description. Implementations not shown or described in the drawings are forms known to those skilled in the art. Furthermore, directional terms mentioned in the embodiments, such as "up," "down," "top," "bottom," "left," "right," "front," and "back," are only for reference to the directions in the drawings and are not intended to limit the scope of protection of the present invention.

[0029] like Figures 1 to 4 As shown, in one embodiment, a tobacco shred screening device includes two opposing wall plates 100 and multiple parallel screening rollers 200 installed between the two wall plates 100; for example: Figure 1The screen rollers 200 are arranged in a row. One end of the wall panel 100 is provided with a fixing hole 102 and a sliding groove 101 extending along the length of the wall panel 100 to the other end. The first screen roller 201 of the eight screen rollers 200 arranged in parallel is rotatably connected to the fixing hole 102 through a screen shaft 103. The remaining screen rollers 200, including the second screen roller 202, the third screen roller to the last screen roller 203, are slidably connected to the sliding groove 101 through the screen shaft 103. In this way, the position of the screen rollers 200 can be adjusted by adjusting the position of the screen shaft 103 in the sliding groove 101. A scissor-type telescopic adjustment structure 300 is provided on the outer side of the wall panel 100. The scissor-type telescopic adjustment structure 300 includes several cross-hinged connecting plates 301. The hinge holes in the middle of each connecting plate 301 are sequentially sleeved on the corresponding screening shaft 103 along the length direction of the wall panel 100. The hinge holes at the ends of each connecting plate 301 are designated as first hinge holes 302, and the hinge holes in the middle of each connecting plate 301 are designated as second hinge holes 303. A bearing can be provided between the second hinge hole 303 and the screening shaft 103 to allow for the rotatable installation of the screening shaft 103. The first hinge hole 302 at the end of the connecting plate furthest from the fixed hole 102 in the scissor-type telescopic adjustment structure 300 is used as the end connecting hole 304. All screening shafts 103 on the same side are connected to a drive structure to drive all screening rollers 200 to rotate in the same direction. An actuator is installed on the outer side of the other end of the wall plate 100. The actuator is connected to the adjacent connecting plate, that is, the drive end of the actuator is connected to the end connection hole 304. This actuator is used to drive the scissor-type telescopic adjustment structure 300 to extend and retract, thereby adjusting the distance between any two adjacent screening rollers 200. The scissor-type telescopic adjustment structure 300 can flexibly adjust the distance between any two adjacent screening rollers 200, thereby meeting the screening requirements of tobacco shreds of different lengths and improving the practicality of the device.

[0030] In this embodiment, as Figure 6 , Figure 7As shown, the actuator includes an electric push rod 306 and a movable block 308. The electric push rod 306 is fixedly mounted on the wall panel 100. The telescopic end 307 of the electric push rod 306 is connected to the movable block 308. The movable block 308 is connected to the adjacent connecting plate 301 through a movable plate 305. That is, the movable block 308 is connected to the upper and lower end connection holes 304 on the right end through two movable plates 305. The telescopic movement of the electric push rod 306 drives the movable block 308 to move, which in turn drives the adjacent connecting plate 301 to move. The movement of the connecting plate 301 will drive the movement of other cross-hinged connecting plates 301. The scissor-type telescopic adjustment structure 300 has a compact structure and high practicality. The drive structure drives all the screening rollers 200 to rotate in the same direction through all the screening shafts 103, so that the screening rollers 200 can screen the tobacco shreds; at the same time, since there is no need to install an electric roller in each screening roller 200, the circuit layout can be simplified, the use of electronic components can be reduced, and the layout cost can be reduced; it also makes efficient use of the energy required by the drive structure and improves the power utilization rate of the device.

[0031] In fact, in this embodiment, the movable block 308 is slidably connected to the sliding groove 101 on the side near the wall panel 100. When the electric push rod 306 drives the movable block 308 to move, the sliding groove 101 guides the movable block 308.

[0032] In this embodiment, as Figure 4 , Figure 5 As shown, the screening roller 200 includes a roller body and shoulder portions axially spaced on the outer peripheral surface of the roller body. The shoulder portions of two adjacent screening rollers 200 are staggered; that is, the shoulder portion of one screening roller 200 faces the roller body between two adjacent shoulder portions on the adjacent screening roller 200. In this way, the two adjacent screening rollers 200 are interlocked, thereby forming a rectangular wavy gap between the two screening rollers 200, ensuring that fine tobacco shreds fall off and preventing long tobacco shreds from falling off, effectively improving the screening effect.

[0033] In this embodiment, the roller body and shoulder portion are cylindrical or regular polygonal cylinders. Thus, with this segmented multi-faceted roller structure, the tobacco shreds are continuously tossed and separated during the screening process. First, longer tobacco shreds are separated from shorter ones, then they are diverted to different conveying channels for further processing. When screening shorter tobacco shreds, screening efficiency is improved, screen clogging is eliminated, and the screening cleanliness rate is significantly increased, i.e., the removal rate of ≤1.0mm tobacco dust is improved. Furthermore, stable operation is maintained, and the service life of the screening roller 200 is extended. The segmented multi-faceted roller design allows the device to adjust and control the screening length as needed, thereby achieving precise screening of tobacco shred length and ensuring that the quality of the final product meets standards.

[0034] In this embodiment, as Figure 6 , Figure 8 As shown, a mounting bracket 310 is connected to the outside of the wall panel 100 to protect the drive structure. The drive structure includes a drive motor, a drive wheel 311, a driven wheel 314, a rotating wheel 317, a support wheel, and a drive belt 313. The drive motor can be fixedly mounted on the mounting bracket 310 or the wall panel 100. The drive motor is connected to the drive wheel 311 via a belt or toothed belt. The drive wheel 311 is mounted on the screening shaft 103 corresponding to the fixing hole 102, and seven rotating wheels 317 are mounted on the remaining screening shaft 103. Several support wheels are coaxially mounted on a portion of the hinge holes at both ends of the connecting plate. Several driven wheels 314 are coaxially mounted on another portion of the hinge holes at both ends of the connecting plate. The coaxial mounting can be achieved using shafts or bearings. The drive belt 313 is wound around the drive wheel 311, the rotating wheel 317, the support wheel, and the driven wheel 314 in a specified order.

[0035] Taking an example with eight screening rollers 200; the screening shafts 103 corresponding to the ends of the eight screening rollers 200 are respectively denoted as the first screening shaft, the second screening shaft, the third screening shaft to the eighth screening shaft; a drive wheel 311 is installed on the first screening shaft, and rotating wheels 317 are installed on the second screening shaft, the third screening shaft to the eighth screening shaft, respectively, which are the first rotating wheel, the first rotating wheel to the seventh rotating wheel; the support wheels are divided into first support wheels 315 and second support wheels 316, with four first support wheels 315 installed on four spaced hinge holes at the upper end of the connecting plate 301; four driven wheels 314 and three second support wheels 316 are spaced on seven hinge holes at the lower end of the connecting plate 301; then, the drive belt 313 is wound around the drive wheel 311, the rotating wheel 317, the support wheel and the driven wheel 314 in a specified order, specifically:

[0036] The drive belt 313 winds clockwise around the drive wheel 311, the first support wheel 315 at the upper left, and the first rotating wheel; then winds counterclockwise around the first second support wheel 316 at the lower left; then winds clockwise around the second rotating wheel, the second first support wheel 315 at the upper left, and the third rotating wheel; then winds counterclockwise around the second second support wheel 316 at the lower end; then winds clockwise around the fourth rotating wheel, the third first support wheel 315 at the upper end, and the fifth rotating wheel; then winds counterclockwise around the third second support wheel 316 at the lower end; then winds clockwise around the sixth rotating wheel, the fourth first support wheel 315 at the upper end, the seventh rotating wheel, and the rightmost driven wheel 314; then winds around the driven wheel 314 located in the middle and on the left side and returns to the drive wheel 311. This winding method allows the drive belt to drive all the screening rollers 200 to rotate in the same direction. Furthermore, during the extension and retraction of the scissor-type telescopic adjustment structure 300, the change in the position of the hinge holes in each connecting plate 301 does not affect the connection between the drive belt 313 and the drive wheel 311, the driven wheel 314, and the support wheel, etc.; thus, stable and reliable power transmission can be achieved.

[0037] In fact, one or two tension adjusting wheels 312 can be set in the installed passive wheel 314 as needed to adjust the tension of the drive belt 313, making the installation of the drive belt 313 more flexible and reliable.

[0038] In this embodiment, as Figure 6 As shown, a limiting hole is machined on the mounting bracket 310, and the outer end of the shaft of the rotating wheel 317 is rotatably mounted on the corresponding limiting hole.

[0039] In this embodiment, as Figure 9 As shown, another drive motor is mounted on the actuator, and another drive wheel 311 is mounted on the output end of the drive motor. The drive wheel 311 is connected to an intermediate wheel via a belt drive, and the intermediate wheel is coaxially mounted on the lower hinge hole of the connecting plate 301 adjacent to the actuator. Another drive motor is mounted on the movable block 308 included in the actuator; since the movable plate 305 changes position during extension and retraction while its length remains constant, this drive motor can stably drive the rotation of the intermediate wheel.

[0040] In this embodiment, the two drive motors have the same power and speed; compared with setting a single drive motor, the large loss of the drive belt 313 in the process of transmitting power can be avoided.

[0041] The above provides a detailed description of the tobacco shred screening device provided by this utility model. The specific embodiments are described only to aid in understanding the method and core concept of this utility model. It should be noted that those skilled in the art can make various improvements and modifications to this utility model without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A tobacco shred screening device, comprising two opposing wall plates and a plurality of screening rollers arranged in parallel between the two wall plates; characterized in that, One end of the wall panel has a fixing hole and a sliding groove extending along the length of the wall panel to the other end; the first screening roller of the multiple parallel screening rollers is rotatably connected to the fixing hole through a screening shaft, and the remaining screening rollers are slidably connected to the sliding groove through the screening shaft; a scissor-type telescopic adjustment structure is provided on the outer side of the wall panel, the scissor-type telescopic adjustment structure includes several cross-hinged connecting plates, and the hinge holes in the middle of each connecting plate are sequentially sleeved on the corresponding screening shaft along the length of the wall panel; all screening shafts on the same side are connected to a drive structure for driving all screening rollers to rotate in the same direction; an actuator is installed on the outer side of the other end of the wall panel, the actuator is connected to the adjacent connecting plate, and is used to drive the scissor-type telescopic adjustment structure to extend and retract, so as to adjust the distance between any two adjacent screening rollers.

2. The tobacco shred screening device according to claim 1, characterized in that, The actuator includes an electric push rod and a movable block. The electric push rod is fixedly mounted on the wall panel, and the telescopic end of the electric push rod is connected to the movable block. The movable block is connected to the adjacent connecting plate through a movable plate.

3. The tobacco shred screening device according to claim 2, characterized in that, The movable block is slidably connected to the sliding groove on the side near the wall panel, and the sliding groove guides the movable block when it moves.

4. The tobacco shred screening device according to claim 1, characterized in that, The drive structure includes a drive motor, a drive wheel, a driven wheel, a rotating wheel, a support wheel, and a drive belt; the drive motor is connected to the drive wheel; the drive wheel is mounted on the screening shaft corresponding to the fixed hole, and several rotating wheels are mounted on the remaining screening shaft; several support wheels are coaxially mounted on a portion of the hinge holes at both ends of the connecting plate; several driven wheels are coaxially mounted on another portion of the hinge holes at both ends of the connecting plate; the drive belt is wound around the drive wheel, rotating wheel, support wheel, and driven wheel in a specified order.

5. The tobacco shred screening device according to claim 4, characterized in that, Some of the passive pulleys are configured as tension adjusting pulleys, which are used to adjust the tension of the drive belt.

6. The tobacco shred screening device according to claim 4 or 5, characterized in that, The actuator is equipped with another drive motor, and the output end of the drive motor is equipped with another drive wheel. The drive wheel is connected to an intermediate wheel, which is coaxially mounted on the lower hinge hole of the connecting plate adjacent to the actuator.

7. The tobacco shred screening device according to claim 1, characterized in that, The screening roller includes a roller body and shoulder portions axially spaced on the outer peripheral surface of the roller body, with the shoulder portions of two adjacent screening rollers being staggered.

8. The tobacco shred screening device according to claim 7, characterized in that, The roller body and the shoulder portion are cylindrical or regular polygonal cylinders.

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