YJ27 Filter Rod Assembly Machine Non-filter Cigarette Blowing-together Device and Its Support and Air-guide Structure

Abstract

The present invention relates to a blowing and gathering device for filterless cigarette rods of a YJ27 filter rod assembling machine and its supporting and air guiding structure. The supporting and air guiding structure includes: a bracket, a graphite block, a compression spring and a limit pin; second stepped holes corresponding to the first stepped holes in the upper and lower parts of the connecting section are provided in the upper and lower parts of the graphite block; a second air guiding hole corresponding to the first air guiding hole is provided in the middle of the graphite block; the second stepped hole successively includes a second small diameter section and a second large diameter section from front to back; the limit pin successively includes from head to tail: a guiding pin shaft and a limit pin cap; the head end of the guiding pin shaft passes through the second stepped hole and the compression spring in sequence and is in interference fit with the first small diameter section of the corresponding first stepped hole; the limit pin cap is slidably arranged in the second large diameter section. The supporting and air guiding structure provided by the present invention can effectively avoid the problem that the graphite block is ejected under the pressure of the compression spring during disassembly and assembly, and has the advantage of convenient disassembly and assembly.

Description

Technical Field

[0001] The invention relates to the technical field of cigarette tipping machines, and in particular to a YJ27 filter tipping machine without a filter tip cigarette blowing and gathering device and a supporting air guiding structure thereof. Background Art

[0002] The front end of the YJ27 filter tip installation machine is equipped with a filter-free cigarette blowing device. Figure 1 As shown. The working principle of the filterless cigarette blowing device is as follows: during the operation of the cigarette rolling unit, when the filter loss monitor photoelectric switch 4 detects that a filter segment is missing, the high-speed electromagnetic valve 2 of the filterless cigarette blowing device is powered on and opened, the positive pressure air path is connected, and the compressed air passes through the air pipe 3, the supporting air guide structure 1' and the air holes on the flange 51 of the converging drum 5, and blows two filterless cigarettes without filter segments on the converging drum receiving groove and at a certain distance from each other from the outer discharge to the inner discharge, so that the filterless cigarette moves a displacement distance in the converging drum receiving groove, and finally the outer discharge cigarette 61 and the inner discharge cigarette 62 in the missing filter wheel groove of the converging drum are closely together to form a cigarette group, and stop at the blocking plate 7 at the rear end of the converging drum, so that the glued cork sheet can be completely attached to the cigarette group, and prevent the washboard from being blocked and causing a fault shutdown. The cigarette group after blowing is finally cut and removed at the secondary cutting drum to ensure the stability of product quality and improve the stability of the unit operation. The function of the supporting air guide structure 1' is to support the air pipe on the one hand, and to guide the airflow discharged from the air pipe 3 into the end face air hole of the flange 51' without leakage and smoothly on the other hand. Figure 2 The supporting gas guide structure includes a bracket 11', a graphite block 12', a compression spring 13' and a cylindrical straight pin 14', see Figure 2 The front end of the graphite block 12' is provided with two Cylindrical straight pin hole, the depth of the cylindrical straight pin hole is 10mm; the rear end of the graphite block 12 is provided with a waist-shaped hole of 30m long and 4mm wide; the middle part of the front end of the graphite block 12 is provided with a second air guide hole, and the end of the second air guide hole is connected to the waist-shaped hole; the graphite block 12 is provided with a convex sealing round tube at the position where the round hole is provided. The bracket 11' is fixed on the column plate, and it is provided with a first air guide hole connected to the air pipe. The bracket 11' is also equipped with two cylindrical straight pins 14' with a diameter of 4mm, and the compression spring 13' is sleeved on the cylindrical straight pin 14'. During installation, one end of the cylindrical straight pin 14' is fixed on the bracket 11', and then the compression spring 13' is put on the cylindrical straight pin 14', and then the other end of the cylindrical straight pin 14' is inserted into the cylindrical straight pin hole of the graphite block 12', and at the same time, force is applied to make the front end of the graphite block support the compression spring, and insert it into the first air guide hole of the bracket together with its sealing round tube. Finally, the front end of the graphite block fits with the bracket, and the rear end fits tightly with the flange under the action of the compression spring pressure, ensuring that the compressed air discharged from the air pipe is leak-free and passes smoothly through the air holes on the end face of the flange.

[0003] When it is necessary to disassemble the converging drum, the approaching drum or repair the front door self-locking device, it is first necessary to remove the support air guiding structure. When removing the support air guiding structure, the repair personnel need to carefully separate the support air guiding structure and the flange plate slowly until the pressure of the compression spring is completely released, and then remove the graphite block and the compression spring. However, there will still be a phenomenon that the compression spring and the graphite block fly off and are lost or the graphite block bounces and is damaged due to the incomplete release of the compression spring pressure. Each time the support air guiding structure is assembled, it is also quite difficult. It is necessary to press the graphite block and the compression spring hard and carefully make them tightly fit and positioned against the end face of the flange plate fixed on the converging drum. If there is a slight carelessness, the graphite block and the compression spring will fly off. If the graphite block and the compression spring are not installed, although the locomotive can still be started, the filterless cigarette blowing and rejecting device will lose its blowing and rejecting function, which is likely to cause the corrugated plate to be blocked; during the operation of the locomotive, when the filter is lost, since the tipping paper with glue cannot ensure that it can be completely pasted on the cigarette at the mouthpiece part, the tipping paper will rotate with the drum and randomly stick to other cigarette groups, forming a Class A quality problem of double tipping paper filter cigarettes, or the tipping paper sticks to the cigarette rolling drum, causing the air holes to be blocked, the locomotive to be dirty, and the shutdown rate to increase. Therefore, how to simplify the disassembly and assembly of the support air guiding structure has attracted more and more attention from technicians in this field. Summary of the Invention

[0004] To solve or partially solve the problems existing in the related technologies, the present invention provides a support air guiding structure for a filterless cigarette blowing and rejecting device of a YJ27 filter rod joining machine.

[0005] The present invention provides a support air guiding structure for a filterless cigarette blowing and rejecting device of a YJ27 filter rod joining machine, which includes: a bracket, a graphite block, a compression spring and a limit pin; wherein,

[0006] The bracket includes a fixed section and a connecting section. The fixed section is used to be connected with the vertical plate column of the filterless cigarette blowing and rejecting device; the upper and lower parts of the connecting section are both provided with first stepped holes, and a first air guiding hole is provided in the middle; the first stepped hole sequentially includes a first small-diameter section and a first large-diameter section from front to back;

[0007] The upper and lower parts of the graphite block are correspondingly provided with second stepped holes corresponding to the first stepped holes in the upper and lower parts of the connecting section; a second air guiding hole corresponding to the first air guiding hole is provided in the middle of the graphite block; the second stepped hole sequentially includes a second small-diameter section and a second large-diameter section from front to back; the second air guiding hole sequentially includes a round hole and a waist-shaped hole from head to tail; a sealing circular tube protruding towards the bracket direction is provided on the front end face of the graphite block at the position where the second air guiding hole is opened; the sealing circular tube is in sealing cooperation with the first air guiding hole of the bracket;

[0008] The limiting pin sequentially includes, from head to tail: a guiding pin shaft and a limiting pin cap; the head end of the guiding pin shaft sequentially passes through a second stepped hole and a compression spring and is in interference fit with the first small-diameter section of the corresponding first stepped hole; the limiting pin cap is slidably arranged in the second large-diameter section; the guiding pin shaft is in clearance fit with the second small-diameter section; the diameter of the limiting pin cap is larger than the inner diameter of the second small-diameter section;

[0009] The compression spring is sleeved outside the guiding pin shaft; the head section of the compression spring is located in the first large-diameter section, and the tail end abuts against the front end face of the graphite block.

[0010] Further, the hole length of the first large-diameter section is not less than the minimum working length of the compression spring.

[0011] Further, an oil seal is arranged at the tail end inside the first air guide hole of the bracket.

[0012] Further, the diameter of the guiding pin shaft of the limiting pin is 4 mm.

[0013] Further, the aperture of the second small-diameter section of the second stepped hole is 4.2 mm; the diameter of the limiting pin cap of the limiting pin is 6 mm, and the aperture of the second large-diameter section is 6.5 mm.

[0014] Further, the length of the guiding pin shaft of the limiting pin is greater than the sum of the hole length of the first stepped hole and the hole length of the second small-diameter section, and less than or equal to the sum of the hole length of the first stepped hole, the maximum compression amount of the compression spring, and the hole length of the second small-diameter section; the hole length of the second large-diameter section is greater than the sum of the maximum compression amount of the compression spring and the length of the limiting pin cap.

[0015] Further, the length of the guiding pin shaft of the limiting pin is the sum of the hole length of the first stepped hole, the pre-exposed length of the sealing circular tube, and the hole length of the second small-diameter section; the pre-exposed length of the sealing circular tube is the length of the sealing circular tube minus its initial preset insertion length into the first air guide hole.

[0016] Further, the length of the guiding pin shaft is 22 mm, and the length of the limiting pin cap is 1.5 mm; the hole length of the second large-diameter section is greater than 5.5 mm.

[0017] Further, the hole length of the waist-shaped hole is 4 mm.

[0018] The present invention also provides a blowing and gathering device for filterless cigarette rods of a YJ27 filter rod assembler, which is provided with the support air guiding structure described in any one of the above.

[0019] The support air guiding structure for the blowing and gathering device for filterless cigarette rods of the YJ27 filter rod assembler provided by the present invention can include the following beneficial effects:

[0020] The limit pin in the support air guiding structure consists of two parts. One part is the guiding pin shaft with a smaller diameter, and the other part is the limit pin cap with a larger diameter located at the tail end of the guiding pin shaft. During installation, the head end of the guiding pin shaft sequentially passes through the second stepped hole of the graphite block and then enters the first stepped hole of the bracket, and is in interference fit with the first small-diameter section of the first stepped hole. Thus, the head end of the guiding pin shaft is fixed. At this time, the limit pin cap can slide in the second large-diameter section of the second stepped hole of the graphite block. Due to the blocking effect of the stepped part of the second stepped hole, it plays a role in limiting the radial movement of the graphite block. When the graphite block pops out towards the flange, the graphite block moves backward along the limit pin. When it moves to the end face of the stepped section of its second stepped hole and contacts the limit pin cap, since the limit pin has been limited at this time, the limit pin cap will exert resistance on the second stepped hole, restricting the further movement of the graphite block. That is, under the limiting action of the limit pin, the graphite block is stuck in this position and cannot move backward continuously. That is, the limit pin in the support air guiding structure provided by the present invention not only plays a guiding role for the compression spring, but also plays a limiting role for the graphite block. In this support air guiding structure, the graphite block can be integrally connected with the bracket through the limit pin, and can also axially displace under the action of the compression spring without detachment, which well avoids the situation that there is no limit for the graphite block in the original support air guiding structure and it is not easy to disassemble and install. In summary, the support air guiding structure provided by the present invention can effectively avoid the problem that the graphite block is ejected under the pressure of the compression spring during disassembly and installation, and has the advantage of convenient disassembly and installation.

[0021] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present invention. Brief Description of the Drawings

[0022] By describing the exemplary embodiments of the present invention in more detail in conjunction with the drawings, the above and other objects, features, and advantages of the present invention will become more obvious. Among them, in the exemplary embodiments of the present invention, the same reference numerals generally represent the same components.

[0023] Figure 1 is a schematic structural diagram of the structure of the YJ27 filter rod assembly machine without a filter rod blowing and gathering device in the prior art;

[0024] Figure 2 is an exploded schematic structural diagram of the support air guiding structure of the YJ27 filter rod assembly machine without a filter rod blowing and gathering device in the prior art;

[0025] Figure 3 is an exploded schematic diagram of the support air guiding structure of the YJ27 filter rod assembly machine without a filter rod blowing and gathering device provided by the embodiment of the present invention;

[0026] Figure 4It is a schematic diagram of the state after the support and air guide structure of the filterless cigarette blowing device of the YJ27 filter rod assembling machine provided by the embodiment of the present invention is installed on the end face of the flange;

[0027] Figure 5 It is a schematic structural diagram of the support and air guide structure of the filterless cigarette blowing device of the YJ27 filter rod assembling machine provided by the embodiment of the present invention;

[0028] Figure 6 It is a schematic structural diagram of the support and air guide structure of the filterless cigarette blowing device of the YJ27 filter rod assembling machine provided by another embodiment of the present invention.

[0029] Description of the reference numerals

[0030] In the prior art

[0031] 1'-Support and air guide structure

[0032] 11'-Bracket

[0033] 12'-Graphite block

[0034] 13'-Compression spring

[0035] 14'-Cylindrical straight pin

[0036] 2-High-speed solenoid valve

[0037] 3-Air pipe

[0038] 4-Optical switch of filter loss monitor

[0039] 5-Confluence drum

[0040] 51-Flange

[0041] 61-Outer discharged cigarette

[0042] 62-Inner discharged cigarette

[0043] 63-Filter rod section

[0044] 7-Blocking plate

[0045] In the present invention:

[0046] 11-Bracket

[0047] 111-First stepped hole

[0048] 112-First air guide hole

[0049] 113-Screw hole

[0050] 12-Graphite block

[0051] 121-Second stepped hole

[0052] 122 - Sealed round tube

[0053] 123 - Waist-shaped hole

[0054] 13 - Compression spring

[0055] 14 - Limit pin

[0056] 141 - Guide pin shaft

[0057] 142 - Limit pin cap Specific implementation manner

[0058] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0059] The terms used in the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The singular forms of "a", "the", and "said" used in the present invention and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0060] It should be understood that although the terms "first", "second", "third", etc. may be used in the present invention to describe various information, such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present invention, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more, unless otherwise specifically defined.

[0061] The present invention provides a support and air guiding structure for the non-filter cigarette rod blowing and gathering device of the YJ27 filter rod assembling machine. Using this support and air guiding structure can greatly reduce the disassembly and assembly difficulty of the support and air guiding structure when it is necessary to disassemble and assemble the converging drum, the approaching drum, or repair the front door self-locking device, which helps to improve work efficiency. In the present application, regarding "front" and "rear" in terms of orientation, the direction close to the flange is "rear", and the direction away from the flange is "front". In the present application, regarding "head" and "tail" in terms of orientation, the direction close to the flange is "tail", and the direction away from the flange is "head".

[0062] The technical solution of the present invention will be further described below in conjunction with specific embodiments:

[0063] An embodiment of the present invention provides a support and air guiding structure for a non-filter cigarette blowing and gathering device of a YJ27 filter rod assembling machine. Please refer to Figure 3 , which includes: a bracket 11, a graphite block 12, a compression spring 13, and a limit pin 14; wherein,

[0064] The bracket 11 includes a fixed section and a connecting section. The fixed section is used to connect with the vertical plate column of the non-filter cigarette blowing and gathering device; please refer to Figure 4 , the upper and lower parts of the connecting section are both provided with first stepped holes 111, and the middle part is provided with a first air guiding hole 112; the first stepped hole 111 sequentially includes a first small-diameter section and a first large-diameter section from front to back;

[0065] Please refer to Figure 4 , the upper and lower parts of the graphite block 12 are provided with second stepped holes 121 corresponding to the first stepped holes 111 in the upper and lower parts of the connecting section; the middle part of the graphite block 12 is provided with a second air guiding hole corresponding to the first air guiding hole 112; the second stepped hole 121 sequentially includes a second small-diameter section and a second large-diameter section from front to back; the second air guiding hole sequentially includes a round hole and a waist-shaped hole 123 from head to tail; a sealing circular tube 122 protruding towards the bracket 11 is provided on the front end face of the graphite block 12 at the position where the second air guiding hole is opened; the sealing circular tube 122 is in sealing cooperation with the first air guiding hole 112 of the bracket 11;

[0066] The limit pin 14 sequentially includes from head to tail: a guiding pin shaft 141 and a limit pin cap 142; the head end of the guiding pin shaft 141 passes through the second stepped hole 121 and the compression spring 13 in sequence and is in interference fit with the first small-diameter section of the corresponding first stepped hole 111; the limit pin cap 142 is slidably arranged in the second large-diameter section; the guiding pin shaft 141 is in clearance fit with the second small-diameter section; the diameter of the limit pin cap 142 is larger than the inner diameter of the second small-diameter section;

[0067] The compression spring 13 is sleeved outside the guiding pin shaft 141; the head section of the compression spring 13 is located in the first large-diameter section, and the tail end abuts against the front end face of the graphite block 12.

[0068] In the support and air guiding structure provided by this embodiment:

[0069] The bracket 11 is used to support and fix the support air pipe and at the same time introduce the air flow of the air pipe. The bracket 11 includes a fixed section and a connecting section, wherein: the fixed section is used to connect with the vertical plate column of the non-filter cigarette blowing and gathering device. After it is fixed to the vertical plate column through the fixed section, it can play a good supporting role for the air pipe. Specifically, screw holes 113 are preferably provided on the fixed section ( Figure 3) for being fixedly connected to the vertical plate column through fasteners such as bolts. The connection section is used to cooperate with the graphite block 12 to achieve sealed gas conduction of the air flow. In the first stepped holes 111 opened in the upper and lower parts of the connection section, the first small-diameter section is used to fix the head end of the limit pin 14, and the two are realized through interference fit, thereby realizing the limit of the axis of the limit pin 14; the first large-diameter section is used to place the head section of the compression spring 13. On the one hand, after the compression spring 13 is compressed, it is tightly received in this space, which is beneficial to reducing the gap between the bracket 11 and the graphite block 12. On the other hand, it can play a certain limiting role for the compression spring 13. As a preferred solution of this embodiment, the hole length of the first large-diameter section is not less than the minimum working length of the compression spring 13. Please refer to Figure 4 , when the compression spring 13 is in the maximum compression state (the length is the minimum working length), the compression spring 13 is completely pressed into the first large-diameter section. At this time, the bracket 11 and the graphite block 12 are almost completely attached, which helps to improve the sealing effect. A first air guide hole 112 is opened in the middle of the bracket 11. On the one hand, the first air guide hole 112 is connected to the air pipe, and on the other hand, it is hermetically fitted with the sealing circular pipe 122 of the graphite block 12, and is used to introduce the air flow discharged from the air pipe into the graphite block 12, and then introduce the air flow into the air holes on the end face of the flange through the second air guide hole on the graphite block 12. In order to further optimize the sealing effect, an oil seal is provided at the tail end of the first air guide hole 112 of the bracket 11.

[0070] The upper and lower parts of the above-mentioned graphite block 12 are both provided with second stepped holes 121. The second stepped holes 121 in the upper and lower parts correspond to the first stepped holes 111 in the upper and lower parts of the connection section of the bracket 11, that is, the second step in the upper part of the graphite block 12 is concentric with the first stepped hole 111 in the upper part of the connection section, and the second step in the lower part of the graphite block 12 is concentric with the first stepped hole 111 in the lower part of the connection section. Those skilled in the art can understand that the number of limit pins 14 should be the same as the number of the first stepped holes 111 / second stepped holes 121, that is, there should be two, which are respectively installed in the upper and lower parts of the graphite block 12 and the bracket 11. Correspondingly, there should also be two compression springs 13, which are respectively installed in the upper and lower parts of the graphite block 12 and the bracket 11. A first air guide hole 112 is opened in the middle of the graphite block 12, which corresponds to the second air guide hole of the bracket 11. In order to ensure the sealing effect of the air flow, the graphite block 12 is provided with a sealing circular pipe 122 protruding towards the bracket 11 at the first air guide hole 112. During operation, the sealing circular pipe 122 is partially or completely inserted into the first air guide hole 112, thereby preventing air leakage.

[0071] The above compression spring 13 is located between the first large-diameter section of the first stepped hole 111 of the bracket 11 and the front end face of the graphite block 12, and is used to apply pressure to the graphite block 12 so that the rear end face of the graphite block 12 is in close contact with the flange, improving the airtightness of the air flow. The compression spring 13 is sleeved outside the guiding pin shaft 141 of the limit pin 14. The limit pin 14 in the support and air guiding structure provided in this embodiment not only guides the compression spring 13, but also limits the graphite block 12. Specifically: The limit pin 14 is composed of two parts. One part is the guiding pin shaft 141 with a smaller diameter, and the other part is the limit pin cap 142 located at the tail end of the guiding pin shaft 141, and the diameter of the limit pin cap 142 is larger. During installation, the head end of the guiding pin shaft 141 sequentially passes through the second stepped hole 121 and then enters the first stepped hole 111, and is in interference fit with the first small-diameter section. Thus, the head end of the guiding pin shaft 141 is fixed. Since the diameter of the limit pin cap 142 of the guiding pin shaft 141 is larger, the stepped part of the second stepped hole 121 blocks it, making it play a role in limiting the radial movement of the graphite block 12. When the graphite block 12 pops out towards the flange direction, the graphite block 12 moves backward along the limit pin 14. When it moves to the end face of the stepped section of its second stepped hole 121 in contact with the limit pin cap 142, since the limit pin 14 has been limited at this time (its head end is in interference fit with the first small-diameter section of the first stepped hole 111), the limit pin cap 142 will apply resistance to the second stepped hole 121, restricting the further movement of the graphite block 12. That is, under the limiting action of the limit pin 14, the graphite block 12 is stuck in this position and cannot continue to move backward. Therefore, the problem that the graphite block 12 pops out under the pressure of the compression spring 13 during the disassembly and assembly of the support and air guiding structure can be effectively avoided, greatly simplifying the disassembly and assembly operation of the support and air guiding structure.

[0072] The installation process of the support and air guiding structure provided in this embodiment is as follows:

[0073] Insert a limit pin 14 into the second stepped hole 121 in the upper part of the graphite block 12. The guiding pin shaft 141 of the limit pin 14 passes through the second stepped hole 121, and then sleeve the compression spring 13 outside the guiding pin shaft 141. After aligning the guiding pin shaft 141 with the first stepped hole 111 in the upper part of the bracket 11, press the graphite block 12 and the bracket 11 tightly, and then use a tool to knock the guiding pin shaft 141 into the first small-diameter section of the first stepped hole 111; Install another limit pin 14 and compression spring 13 in the same way. Thus, the assembly is completed. Due to the limiting action of the limit pin 14 on the graphite block 12, the graphite block 12 will not pop out under the action of the compression spring 13. Correspondingly, the spring is not easy to pop out either.

[0074] When it is necessary to remove the support air guiding structure, it is only necessary to separate the support air guiding structure from the flange until the support air guiding structure can be removed. Due to the limiting effect of the limiting pin 14 on the graphite block 12, even if the pressure of the compression spring 13 is not completely released, the graphite block 12 will not be ejected, thus greatly reducing the difficulty of disassembling the support air guiding structure.

[0075] As can be seen from the above, the support air guiding structure provided by the embodiment of the present invention has the following advantages:

[0076] The limiting pin 14 in the support air guiding structure is composed of two parts. One part is the guiding pin shaft 141 with a smaller diameter, and the other part is the limiting pin cap 142 with a larger diameter located at the tail end of the guiding pin shaft 141. During installation, the head end of the guiding pin shaft 141 sequentially passes through the second stepped hole 121 of the graphite block 12 and then enters the first stepped hole 111, and is in interference fit with the first small-diameter section of the first stepped hole 111. Thus, the head end of the guiding pin shaft 141 is fixed. At this time, the limiting pin cap 142 can slide in the second large-diameter section of the second stepped hole 121 of the graphite block 12. Due to the blocking effect of the stepped part of the second stepped hole 121, it plays a limiting role in the radial movement of the graphite block 12. When the graphite block 12 pops out towards the flange direction, the graphite block 12 moves backward along the limiting pin 14. When it moves to the end face of the stepped section of its second stepped hole 121 in contact with the limiting pin cap 142, since the limiting pin 14 has been limited at this time, the limiting pin cap 142 will apply a resistance to the second stepped hole 121 to limit the further movement of the graphite block 12. That is, under the limiting effect of the limiting pin 14, the graphite block 12 is stuck in this position and cannot move backward continuously. That is, the limiting pin 14 in the support air guiding structure provided by the embodiment of the present invention not only plays a guiding role for the compression spring 13, but also plays a limiting role for the graphite block 12. In this support air guiding structure, the graphite block 12 can be integrally connected with the bracket 11 through the limiting pin 14, and can also axially displace under the action of the compression spring 13 without detachment, which well avoids the situation that the original support air guiding structure has no graphite block limit and is not easy to disassemble and install. In summary, the support air guiding structure provided by the embodiment of the present invention can effectively avoid the problem that the graphite block is ejected under the pressure of the compression spring during disassembly and assembly, and has the advantage of convenient disassembly and assembly.

[0077] The diameter of the guiding pin shaft 141 of the above limiting pin 14 is preferably 4 mm, that is, the same as the diameter of the cylindrical straight pin in the existing support air guiding structure. Thus, the existing bracket in the support air guiding structure can be directly used without modification of the stepped hole on the bracket. The diameter of the second small-diameter section of the second stepped hole is preferably 4.2 mm; the diameter of the limiting pin cap 142 of the limiting pin 14 is preferably 6 mm, and the diameter of the second large-diameter section is preferably 6.5 mm.

[0078] Those skilled in the art can achieve different assembled states of the support gas guiding structure by adjusting the hole length of the second large-diameter section of the second stepped hole 121, the length of the limit pin 14, etc. Preferably, the length of the limit pin 14 is less than the sum of the hole lengths of the first stepped hole 111 and the second stepped hole 121, thereby ensuring that the end of the limit pin 14 does not affect the fitting of the graphite block 12 and the flange after the graphite block 12 and the bracket 11 are completely pressed and fitted. Further:

[0079] The length of the guiding pin shaft 141 of the limit pin 14 is greater than the sum of the hole length of the first stepped hole 111 and the hole length of the second small-diameter section, and less than or equal to the sum of the hole length of the first stepped hole 111, the maximum compression amount of the compression spring, and the hole length of the second small-diameter section; the hole length of the second large-diameter section is greater than the sum of the maximum compression amount of the compression spring 13 and the length of the limit pin cap 142. The maximum compression amount of the compression spring is the free length of the compression spring 13 minus the minimum working length. Thus, the assembled state of the support gas guiding structure is as Figure 5 shown. At this time, the spring is in the free length or pre-compressed state, and the limit pin cap 142 of the limit pin 14 abuts against the step of the second stepped hole 121. After pressing this support gas guiding structure into the end face of the flange, its state is as Figure 4 shown. The compression spring 13 is compressed and lies in the first large-diameter section of the first stepped hole 111. The graphite block 12 and the bracket 11 are almost in contact. The sealing circular tube 122 of the graphite block 12 is inserted into the first gas guiding hole 112 of the bracket 11, and the two are in sealing cooperation to prevent air leakage.

[0080] Further, the length of the guiding pin shaft 141 of the limit pin 14 is the sum of the hole length of the first stepped hole 111, the pre-exposed length of the sealing circular tube 122, and the hole length of the second small-diameter section; the pre-exposed length of the sealing circular tube 122 is the length of the sealing circular tube 122 minus its initial preset length inserted into the first gas guiding hole 112. Thus, the assembled state of the support gas guiding structure is as Figure 6 shown. At this time, the spring is in the pre-compressed state, the limit pin cap 142 of the limit pin 14 abuts against the step of the second stepped hole 121, and the sealing circular tube 122 is inserted into the first gas guiding hole 112 for a certain distance. Thus, in the process of compressing and fitting the support gas guiding structure to the flange, it is convenient to install and position the sealing circular tube 122. Most preferably, the length of the above guiding pin shaft 141 is 22 mm, and the length of the limit pin cap 142 is 1.5 mm. Using the bracket and compression spring of the existing support gas guiding structure, the length of the sealing circular tube 122 is 6 mm, the length of the oil seal in the first mounting hole is 4 mm, and the initial preset length of the sealing circular tube 122 inserted into the gas guiding hole is designed to be 2 mm. Thus, the pre-exposed length of the sealing circular tube 122 is 4 mm, that is, the maximum deformation of the graphite block 12 sliding along the limit pin 14 is 4 mm. Thus, the hole length of the second large-diameter section is designed to be greater than 5.5 mm (4 mm + 1.5 mm). In this embodiment, the hole length of the second large-diameter section is designed to be 12 mm.

[0081] In addition, the depth of the waist-shaped hole on the existing graphite block is 3 mm. Through research, the inventors of the present application found that when working, at the moment when the high-speed solenoid valve is opened, the injection air flow has the problem that the action time per unit time is too short. Therefore, in another embodiment of the present application, the hole length of the waist-shaped hole 123 is 4 mm, that is, the depth of the waist-shaped hole 123 is 4 mm. By increasing the depth of the waist-shaped hole, the cavity volume of the waist-shaped hole 123 is increased, thereby prolonging the air flow injection time and better ensuring the blowing-together effect of the filterless cigarette.

[0082] Another embodiment of the present invention further provides a blowing-together device for filterless cigarettes of a YJ27 filter rod assembling machine, which is provided with the support air guiding structure described in the above embodiment. Since the above support air guiding structure has the above advantages, therefore, the blowing-together device for filterless cigarettes of the YJ27 filter rod assembling machine also has corresponding advantages, which will not be elaborated here.

[0083] The embodiments of the present invention have been described above. The above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations are obvious to those of ordinary skill in the art in the technical field without departing from the scope and spirit of the described embodiments. The selection of the terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other ordinary skill in the art in the technical field to understand the embodiments disclosed herein.

Claims

1. A support and air guiding structure for the filterless cigarette blowing and gathering device of the YJ27 filter rod assembling machine, characterized in that, Comprising: A bracket, a graphite block, a compression spring and a limit pin; wherein, The bracket includes a fixed section and a connecting section. The fixed section is used to connect with the vertical plate column of the filterless cigarette blowing device; both the upper and lower parts of the connecting section are provided with first stepped holes, and the middle part is provided with a first air guide hole; the first stepped hole sequentially includes a first small-diameter section and a first large-diameter section from front to back; The upper and lower parts of the graphite block are provided with second stepped holes corresponding to the first stepped holes in the upper and lower parts of the connecting section; the middle part of the graphite block is provided with a second air guide hole corresponding to the first air guide hole; the second stepped hole sequentially includes a second small-diameter section and a second large-diameter section from front to back; the second air guide hole sequentially includes a round hole and a waist-shaped hole from head to tail; a sealing circular tube protruding towards the bracket direction is arranged on the front end face of the graphite block at the position where the second air guide hole is opened; the sealing circular tube is in sealing fit with the first air guide hole of the bracket; The limit pin sequentially includes from head to tail: a guiding pin shaft and a limit pin cap; the head end of the guiding pin shaft sequentially passes through the second stepped hole and the compression spring and is in interference fit with the first small-diameter section of the corresponding first stepped hole; the limit pin cap is slidably arranged in the second large-diameter section; the guiding pin shaft has a clearance fit with the second small-diameter section; the diameter of the limit pin cap is larger than the inner diameter of the second small-diameter section; The compression spring is sleeved outside the guiding pin shaft; the head section of the compression spring is located in the first large-diameter section, and the tail end abuts against the front end face of the graphite block; The length of the guiding pin shaft of the limit pin is the sum of the hole length of the first stepped hole, the pre-exposed length of the sealing circular tube and the hole length of the second small-diameter section; the hole length of the first large-diameter section is not less than the minimum working length of the compression spring; the hole length of the second large-diameter section is greater than the sum of the maximum compression amount of the compression spring and the length of the limit pin cap; the pre-exposed length of the sealing circular tube is the length of the sealing circular tube minus its initial preset length inserted into the first air guide hole.

2. The support and air guiding structure according to claim 1, characterized in that, An oil seal is arranged inside the tail end of the first air guide hole of the bracket.

3. The support and air guiding structure according to claim 1, characterized in that, The diameter of the guiding pin shaft of the limit pin is 4 mm.

4. The support and air guiding structure according to claim 3, characterized in that, The aperture of the second small-diameter section of the second stepped hole is 4.2 mm; the diameter of the limit pin cap of the limit pin is 6 mm, and the aperture of the second large-diameter section is 6.5 mm.

5. The support and air guiding structure according to claim 1, characterized in that, The length of the guiding pin shaft is 22 mm, and the length of the limit pin cap is 1.5 mm; the hole length of the second large-diameter section is greater than 5.5 mm.

6. The support and air guiding structure according to claim 1, characterized in that, The hole length of the waist-shaped hole is 4 mm.

7. A filterless cigarette blowing and gathering device for the YJ27 filter rod assembling machine, characterized in that, The support air guiding structure according to any one of claims 1 to 6 is provided.

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