Cigarette machine cigarette gun guide roller shaft removal device

Abstract

This invention discloses a device for removing the guide roller shaft of a cigarette machine's tobacco pipe, belonging to the technical field of cigarette equipment maintenance tools. It aims to solve the problems of existing methods for disassembling guide roller shafts being time-consuming, labor-intensive, prone to damaging the workpiece, and poorly adaptable to confined working spaces. This removal device adopts a split-type coaxial assembly structure, including a screw head, a support rod, and a sliding hammer. The front end of the screw head can be rigidly connected to the threaded hole on the end face of the guide roller shaft, and the rear end is coaxially and detachably threadedly fixed to the support rod. The sliding hammer is fitted onto the support rod through a central through-hole with a clearance fit, and can freely reciprocate along the axial direction of the rod. The coaxial arrangement of the three components ensures stable force transmission. Based on the principle of axial impact inertia, this invention uses the coaxial pulling force generated by the impact of the sliding hammer to smoothly remove the guide roller shaft. It features a compact structure, convenient operation, and enables non-destructive and rapid disassembly, significantly shortening maintenance time, reducing labor intensity, and is suitable for batch maintenance of cigarette machine units.

Description

Technical Field

[0001] This invention relates to the field of cigarette equipment maintenance tools, specifically to a device for removing the guide roller shaft of a cigarette machine's cigarette gun cloth. Background Technology

[0002] Cigarette rolling machines are the mainstay of cigarette production in the tobacco industry. The cigarette rolling unit is the core component for cigarette forming, its core function being to gradually compress and expand the tobacco bundle, ultimately shaping it into a continuous cigarette strip that meets circumferential specifications. The conveyor belt of the cigarette rolling unit is the core carrier for transporting the tobacco bundle and cigarette paper; its smooth operation directly determines the quality of cigarette rolling and the continuity of equipment production. The belt's movement relies on a belt reel and guide rollers, which are installed at both ends of the cigarette rolling unit base in an extremely confined space, restricting operational movement.

[0003] During long-term high-speed operation of the equipment, the guide roller shaft and bearings of the conveyor belt are easily damaged. The disassembly and removal of the guide roller shaft is the core link of maintenance and replacement. The existing disassembly methods have many defects, which directly lead to time-consuming and labor-intensive maintenance and replacement work, seriously affecting the timeliness of equipment maintenance, reducing equipment production efficiency, and significantly increasing the labor intensity of maintenance personnel.

[0004] Currently, the tobacco industry mainly adopts two technical solutions for disassembling the guide roller shaft of cigarette rolling machines:

[0005] 1. Lever prying method: By screwing an external hexagonal stud into the end face of the guide roller shaft, the guide roller shaft is removed by prying the stud with a pry bar using the lever principle. This method is simple in operation, but the disassembly process is time-consuming and laborious. Moreover, the force is uneven during the prying process, which can easily cause damage to the threads of the belt guide roller shaft and deformation of the shaft body, making it impossible to achieve non-destructive disassembly. 2. Puller Bracket Solution: A dedicated puller bracket is manufactured and connected to the end face of the guide roller shaft with screws. The puller's screw pushes the guide roller shaft out. This solution has a simple operation process, but it is limited by the small installation space of the cigarette gun base. There are very few positions where the bracket can be fixed and supported, making stable installation impossible. During disassembly, the cigarette gun base is easily scratched or bumped, causing irreversible damage to the core components of the equipment. Summary of the Invention

[0006] To overcome the above-mentioned defects, the present invention aims to provide a cigarette gun cloth guide roller shaft removal device that is suitable for the narrow installation space of cigarette machines, has a simple structure, is easy to disassemble and assemble, has strong adaptability, and can achieve non-destructive disassembly. This solves the problems of time-consuming and labor-intensive disassembly methods and low maintenance efficiency, significantly shortens the replacement and maintenance time of the cloth guide roller shaft, reduces the labor intensity of maintenance personnel, and meets the use needs of batch maintenance of cigarette making units.

[0007] The technical solution adopted by this invention to solve its technical problem is as follows: A device for removing the guide roller shaft of a cigarette gun fabric belt in a cigarette machine includes a screw head, a sliding hammer, and a support rod in a split coaxial assembly structure. The screw head is a detachable multi-specification connecting component used to connect with the guide roller shaft of the fabric belt to be detached; one end is provided with an external thread structure, which matches the internal thread hole on the end face of the guide roller shaft of the cigarette machine, and a rigid connection is formed by screwing it into the thread hole of the guide roller shaft; the other end is provided with a coaxial internal thread hole, which is used to achieve detachable threaded fixation with the support rod; The support rod is the main load-bearing component and is a smooth cylindrical rod structure. One end of the rod is provided with an external thread section, the thread specification of which matches the internal thread hole of the screw head and can be coaxially screwed and fixed with the screw head. The other end is integrally provided with a limiting end, which is used to axially limit the sliding hammer and bear the axial impact load generated by the sliding hammer. The sliding hammer is an impact power component and is a columnar structure with a central through hole. Its central through hole is clearance-fitted with the smooth body of the support rod, so that the sliding hammer can slide freely back and forth along the axial direction of the support rod without excessive radial sway.

[0008] As an improvement to the above technical solution, the outer cylindrical surface of the sliding hammer is provided with a knurled structure to improve the anti-slip performance when the operator holds it and ensure the stability of the sliding operation.

[0009] As an improvement to the above technical solution, the sliding hammer is fitted onto the smooth body of the support rod through the central through hole, so that it can slide freely back and forth along the axial direction within the range of the rod body between the screw head and the limiting end of the support rod.

[0010] As an improvement to the above technical solution, the central axes of the screw head, support rod and sliding hammer are completely coincident, ensuring that the impact force is transmitted axially along the guide roller shaft during disassembly, and avoiding damage to components caused by off-center loading.

[0011] As an improvement to the above technical solution, the removal device is based on the principle of axial impact inertial transmission. It utilizes the instantaneous impact inertial force generated by the high-speed sliding of the sliding hammer along the axis of the support rod to stably transmit the coaxial axial tension to the fabric guide roller shaft through the support rod and screw head. This continuously overcomes the interference fit force and jamming force between the guide roller shaft and the mounting hole of the cigarette gun base, gradually and smoothly pulling the guide roller shaft out of the mounting hole, ultimately achieving non-destructive and rapid disassembly of the fabric guide roller shaft.

[0012] The beneficial effects of this invention are as follows: 1. Significantly improve maintenance efficiency and shorten equipment downtime. This invention enables the rapid disassembly of the fabric guide roller shaft, reducing the maintenance time for a single guide roller shaft replacement from 45 minutes to 15 minutes, saving 30 minutes per maintenance. Based on 30 winding and splicing units in the workshop, and an average replacement of the fabric guide roller shaft every six months for each unit, a total of 1800 minutes (30 hours) of maintenance time can be saved annually, significantly improving the effective operating rate of the equipment.

[0013] 2. Enables non-destructive disassembly, avoiding damage to equipment components. This invention achieves disassembly by using a threaded rigid connection between the screw head and the guide roller shaft, combined with coaxial impact and pulling force. It eliminates the traditional prying and pulling method of disassembly, fundamentally avoiding damage to the threads and shaft of the cloth belt guide roller shaft during disassembly. At the same time, it eliminates the problem of scratches and bumps on the smoke gun base, ensuring the integrity of the core components of the equipment.

[0014] 3. Suitable for confined working spaces, easy and labor-saving operation. This invention adopts a split and compact structure, and its overall size is perfectly adapted to the narrow installation space of the cigarette gun part of the YJ17 cigarette machine. No additional brackets, pry bars or other auxiliary tools are required. Disassembly can be completed simply by sliding and impacting the sliding hammer, which greatly reduces the operation difficulty and labor intensity of maintenance personnel.

[0015] 4. Simple and reliable structure, strong versatility and maintainability. The core components of this invention consist of only 3 parts, all of which are connected by threaded detachable parts. The screw head can be quickly replaced according to the thread specification of the guide roller shaft, making it highly adaptable. The parts can be processed using conventional 45# steel, which is easy to process and has low manufacturing cost. Individual parts can be replaced separately when damaged, making maintenance convenient. It has now been promoted to be used in all units of the rolling and packaging workshop. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0017] Figure 1 This is a schematic diagram of the structure of the present invention. Detailed Implementation

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments and accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0019] In this embodiment, all orientation descriptions refer to the end facing the guide roller shaft as the "front end" and the end facing the operator as the "tail end / rear end" when the invention is used. The axial direction is along the central axis of the support rod 3, and the radial direction is perpendicular to the central axis.

[0020] Please see Figure 1 The present invention provides a cigarette machine cigarette gun guide roller shaft removal device, which is a split coaxial combination structure. The core is composed of three basic components: screw head 1, sliding hammer 2, and support rod 3. The whole adopts a coaxial design to ensure the coaxial transmission of axial tensile force during disassembly and avoid damage to the workpiece due to off-center load.

[0021] The screw head 1 is a detachable adapter connection component with a stepped cylindrical structure. Its front end has an external thread section, and the thread specification matches the standard internal thread hole on the end face of the cigarette machine's guide roller shaft. It forms a rigid coaxial connection by screwing into the thread hole of the guide roller shaft. The rear end center of the screw head 1 has a coaxial internal thread hole for detachable threaded fixation with the support rod 3. The depth of the internal thread hole is not less than 1 / 2 of the total length of the screw head 1 to ensure the tensile strength of the threaded connection.

[0022] The support rod 3 is the main load-bearing and guiding component, adopting a smooth cylindrical rod structure with a constant diameter. Its front end has an external thread section, and the thread specification is completely matched with the internal thread hole at the rear end of the screw head 1, so that it can be coaxially screwed and fixed with the screw head 1. The tail end of the support rod 3 is integrally formed with a limiting end. The outer diameter of the limiting end is larger than the outer diameter of the support rod 3 body and larger than the inner diameter of the central through hole of the sliding hammer 2. It is used to axially limit the sliding hammer 2 and bear the axial impact load generated by the impact of the sliding hammer 2. The end face of the limiting end can be provided with an internal hexagon countersunk hole, which facilitates tightening the threaded connection between the support rod 3 and the screw head 1 with the assistance of a wrench.

[0023] The sliding hammer 2 is an impact power component, a solid cylindrical structure with a central through hole. The central through hole is smooth and fits the smooth body of the support rod 3 with a clearance fit. The fit tolerance is H8 / f7 to ensure that the sliding hammer 2 can slide freely back and forth along the axial direction of the support rod 3 without excessive radial wobble, ensuring stable axial transmission of the impact load. The outer cylindrical surface of the sliding hammer 2 is machined with a knurled structure with a knurling pitch of 0.8-1.2mm to improve the anti-slip performance when the operator holds the hammer and prevent it from slipping out of their hand during sliding operations. Both ends of the sliding hammer 2 are chamfered to prevent scratching the support rod 3 during sliding.

[0024] Furthermore, the screw head 1, support rod 3, and sliding hammer 2 are all made of high-quality carbon structural steel No. 45. After processing, they are all subjected to quenching and tempering heat treatment, with the overall hardness controlled at HRC28-32, and the surface is treated with blackening and rust prevention. The threaded section of the screw head 1 and the threaded section of the support rod 3 need to be subjected to high-frequency quenching treatment, with the surface hardness controlled at HRC45-50, to improve the wear resistance and tensile strength of the threads. Specific Implementation Example 1 This embodiment describes a basic removal device for the standard fabric belt guide roller shaft of a cigarette machine. It is a standard model for mass production applications in the workshop. The specific operation and usage method of this device is as follows: S1, Pre-cleaning and preparation: Clean the smoke oil and dust from the end face of the cigarette machine's guide roller shaft, and clean the debris from the inner threaded hole of the end face to ensure smooth thread connection; S2, pre-connection of screw head 1: Screw the M12 external thread section at the front end of screw head 1 completely into the internal thread hole on the end face of the guide roller shaft until the rear end face of screw head 1 is completely in contact with the end face of the guide roller shaft, ensuring that the thread engagement length is not less than 12mm. S3, Tooling Assembly: Mount the sliding hammer 2 onto the support rod 3, then align the external threaded section of the front end of the support rod 3 with the internal threaded hole of the screw head 1. Tighten the support rod 3 with an Allen wrench, controlling the torque to 25-30N. m, so that it is rigidly fixed with the screw head 1, and the coaxial assembly of the extractor is completed; S4, Impact Disassembly Operation: The operator gently holds the tail end of the support rod 3 with one hand to maintain the coaxiality of the tooling and the guide roller shaft of the fabric belt, and avoids bending of the rod; the other hand holds the knurled part of the sliding hammer 2, and drives the sliding hammer 2 to slide rapidly along the axis of the support rod 3 from the end near the screw head 1 to the tail end limit end at a speed of 0.8-1.2m / s, so that the sliding hammer 2 impacts the limit end of the support rod 3 at high speed, and the axial tensile force is transmitted to the guide roller shaft through the impact inertial force; S5, Repeat the operation to complete the disassembly: Repeat the above impact operation 3-5 times each time. Through continuous and stable coaxial impact and pulling force, gradually overcome the interference fit between the guide roller shaft and the mounting hole, and smoothly pull the cloth belt guide roller shaft out of the mounting hole of the smoke gun base until the guide roller shaft is completely separated from the smoke gun bracket, and complete the entire disassembly operation. S6. Tooling disassembly and storage: After disassembly, rotate the support rod 3 in the opposite direction to separate it from the screw head 1, remove the sliding hammer 2, and then unscrew the screw head 1 from the guide roller shaft. After cleaning, it can be stored.

[0026] This embodiment has been applied in batches to 30 YJ17 type winding and splicing units in the winding and packaging workshop. Through actual verification, the maintenance time for replacing the guide roller shaft of the fabric tape has been reduced from 45 minutes in the traditional way to 15 minutes, saving 30 minutes of maintenance time per maintenance, and a total of 30 hours of maintenance time saved per workshop per year. There were no problems such as damage to the guide roller shaft threads or scratches on the cigarette gun base during the disassembly process, and the non-destructive disassembly qualification rate was 100%. Specific Implementation Example 2 This embodiment optimizes the structure based on Embodiment 1 to further improve the safety, operational stability and service life of the device.

[0028] Specifically, an anti-loosening locking nut is added at the root of the threaded section at the front end of the support rod 3. The anti-loosening locking nut is an M10 fine-thread locking nut, which, after being tightened, can fit against the rear end face of the screw head 1 to prevent the threads of the support rod 3 and the screw head 1 from loosening during disassembly, and to avoid disintegration of the tooling during impact.

[0029] Meanwhile, a polyurethane buffer pad is glued and fixed to each of the two ends of the slide hammer 2. The buffer pad is 3mm thick, with an inner diameter consistent with the central through hole of the slide hammer 2 and an outer diameter consistent with the outer diameter of the slide hammer 2. This effectively reduces the impact noise when the slide hammer 2 hits the limiting end and when it hits the screw head 1 during the return stroke, while also preventing component deformation and wear caused by hard metal contact.

[0030] A 100mm long anti-slip grip sleeve is added to the rear side of the limiting end of the support rod 3. The anti-slip grip sleeve can be made of nitrile rubber and is heat-shrink fixed to the rear end of the support rod 3. The surface is provided with anti-slip ridges to further improve the stability of the operator's grip and prevent the hand from slipping out of the hand in confined spaces.

[0031] During assembly, first screw the anti-loosening locking nut into the front threaded section of the support rod 3, then heat shrink and fix the anti-slip grip sleeve to the tail end of the support rod 3, then put the sliding hammer 2 on, then tighten the support rod 3 and the screw head 1, and finally tighten the anti-loosening locking nut towards the screw head 1 to form a threaded anti-loosening mechanism.

[0032] When in use, the operator holds the non-slip grip sleeve, which can completely avoid the problem of low-temperature freezing and slippage of the metal rod. When the sliding hammer 2 impacts, it achieves soft contact through the buffer pad, reducing impact noise by more than 60%, and at the same time, no metal debris is generated, which meets the clean production requirements of the cigarette workshop; there is no risk of thread loosening throughout the process, and the operational safety is greatly improved. Specific Implementation Example 3 This embodiment expands upon the core structure with a universal design, featuring a multi-specification replaceable screw head kit. This kit is compatible with the disassembly of various cigarette rolling machines, including different models, fabric guide rollers, spinning rollers, and conveyor belt rollers, significantly improving the tooling's versatility and applicability.

[0034] Specifically, the external thread interface at the front end of the support rod 3 is uniformly set to a standard M12×1.5mm external thread interface, and a multi-specification screw head 1 kit is designed to match it. The rear end of all screw heads 1 is provided with a uniform M12×1.5mm internal thread connection hole, which can be universally connected with the support rod 3.

[0035] Simultaneously, six different specifications of screw heads 1 are designed, with front-end external thread specifications of M6, M8, M10, M12, M14, and M16, respectively, to adapt to the end face thread hole specifications of the cloth guide roller shaft, filament polishing roller shaft, and conveyor belt roller shaft of mainstream cigarette machine models such as YJ17, YJ19, ZJ17, and PROTOS, so as to realize the disassembly of multiple machine models and multiple specifications of roller shafts with one set of tooling.

[0036] For the slide weight 2 assembly: three different weight slide weights are designed, namely 0.8kg, 1.2kg and 1.8kg. The corresponding weight slide weight 2 can be replaced according to the size of the interference fit of the roller. Lightweight slide weight 2 is selected for small rollers to avoid damaging the workpiece, while heavyweight slide weight 2 is selected for rollers with large interference fit to improve disassembly efficiency.

[0037] Therefore, the main support rod 3 and the sliding hammer 2 of the device in this embodiment are both designed in a standardized manner. When using them, it is only necessary to replace the screw head 1 with the corresponding specification according to the thread specification of the roller shaft to be disassembled, and then select the sliding hammer 2 with the appropriate weight according to the interference fit, so as to complete the disassembly operation of different roller shafts.

[0038] In addition to being compatible with the YJ17 type cigarette machine fabric guide roller shaft, this embodiment can also be applied to the disassembly of various roller components such as the bearing sleeve of the cigarette machine's shredding roller, the tobacco conveyor belt roller shaft, and the fabric reel roller shaft. It has extremely strong versatility and can cover more than 90% of the roller disassembly scenarios of the cigarette making machine unit in the cigarette workshop, greatly reducing the number of special tooling configurations in the workshop and reducing the cost of maintenance tooling.

[0039] It should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A device for removing the guide roller shaft of the cigarette gun cloth in a cigarette machine, characterized in that: It includes a screw section, a sliding hammer, and a support rod, which are in a split coaxial assembly structure; The screw part is a detachable multi-specification connecting component used to connect with the fabric guide roller shaft to be detached; one end is provided with an external thread structure, which matches the internal thread hole on the end face of the fabric guide roller shaft, and a rigid connection is formed by screwing it into the thread hole of the guide roller shaft; the other end is provided with a coaxial internal thread hole, which is used to achieve detachable threaded fixation with the support rod; The support rod is the main load-bearing component and is a smooth cylindrical rod structure. One end of the support rod is provided with an external thread section, the thread specification of which matches the internal thread hole of the screw part and is coaxially screwed and fixed with the screw part. The other end is integrally provided with a limiting end head. The outer diameter of the limiting end head is larger than the outer diameter of the support rod, which is used to axially limit the sliding hammer and bear the axial impact load generated by the sliding hammer. The sliding hammer is an impact power component and is a columnar structure with a central through hole. Its central through hole is clearance-fitted with the smooth body of the support rod so that the sliding hammer can slide freely back and forth along the axial direction of the support rod. The outer diameter of the sliding hammer is smaller than the outer diameter of the limiting end.

2. The fabric belt guide roller shaft removal device according to claim 1, characterized in that: When the external threaded section at the front end of the screw is fully screwed into the internal threaded hole on the end face of the belt guide roller shaft, the depth of the internal threaded hole at the rear end of the screw is not less than 1 / 2 of the total length of the screw.

3. The fabric belt guide roller shaft removal device according to claim 1, characterized in that: The outer cylindrical surface of the sliding hammer is provided with a knurled structure to improve the anti-slip performance when the operator holds it and to ensure the stability of the sliding operation.

4. The fabric belt guide roller shaft removal device according to claim 1, characterized in that: An anti-loosening locking nut is also fitted on the external threaded section at the front end of the support rod. After the anti-loosening locking nut is tightened, it fits against the rear end face of the screw part to prevent the support rod from becoming loose from the screw part.

5. The fabric guide roller shaft removal device according to claim 1, characterized in that: The central axes of the screw, support rod, and slide are completely aligned, ensuring that the impact force is transmitted axially along the guide roller shaft during disassembly.

6. The fabric guide roller shaft removal device according to claim 1, characterized in that: Both the front and rear ends of the slide are fixed with buffer noise reduction pads. The inner diameter of the buffer noise reduction pads is the same as the inner diameter of the central through hole of the slide, and the outer diameter of the buffer noise reduction pads is the same as the outer diameter of the slide.

7. The fabric belt guide roller shaft removal device according to claim 1, characterized in that: The screw section, the support rod, and the sliding hammer are all made of 45# high-quality carbon structural steel and formed by quenching and tempering heat treatment. The external thread section of the screw section and the external thread section of the support rod are both subjected to high-frequency quenching treatment.

8. The fabric belt guide roller shaft removal device according to claim 1, characterized in that: The extraction device also includes at least two replaceable screw sections with different front-end external thread specifications, and the rear end of all the replaceable screw sections is provided with a uniform internal thread hole that matches the front-end external thread section of the support rod.

9. A method for operating a cigarette machine tobacco gun guide roller shaft removal device, characterized in that: The method, applied to the fabric guide roller shaft removal device according to any one of claims 1 to 8, includes the following steps: S1, Pre-cleaning and preparation: Clean the smoke and oil and dust from the end face of the guide roller shaft, and clean the debris from the internal threaded hole of the end face to ensure smooth thread connection; S2, pre-connection of screw section: screw the external thread section at the front end of the screw section completely into the internal thread hole on the end face of the guide roller shaft until the rear end face of the screw section is completely in contact with the end face of the guide roller shaft; S3, Tooling assembly: Place the sliding hammer on the support rod, then align the external thread section at the front end of the support rod with the internal thread hole of the screw part, tighten it to make it rigidly fixed with the screw part, and complete the coaxial assembly of the extractor; S4, Impact Disassembly Operation: Hold the tail end of the support rod with one hand to maintain the coaxiality of the tooling and the guide roller shaft; hold the knurled part of the sliding hammer with the other hand and drive the sliding hammer to slide rapidly along the axis of the support rod from one end near the screw to the tail end limit end at a speed of 0.8-1.2m / s, so that the sliding hammer hits the limit end of the support rod, and the axial tensile force is transmitted to the guide roller shaft through the impact inertial force; S5, Repeat the operation to complete the disassembly: Repeat the impact operation of S4, and gradually overcome the interference fit between the guide roller shaft and the mounting hole through continuous and stable coaxial impact pulling force, so as to smoothly pull the cloth belt guide roller shaft out of the mounting hole of the smoke gun base until the guide roller shaft is completely separated from the smoke gun bracket, and complete the entire disassembly operation. S6, Tooling Disassembly and Storage: After disassembly, rotate the support rod in the opposite direction to separate it from the screw part, remove the sliding hammer, and then unscrew the screw part from the guide roller shaft. Clean and store it.

10. The operating method according to claim 9, characterized in that: In step S3, the tightening torque of the support rod and the screw is controlled at 25-30N. m.

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