A cigarette circumference adjusting device and system

Abstract

The present application discloses a cigarette circumference adjusting device, which is used to cooperate with a cigarette gun component to form a cigarette rod forming channel and realize the adjustment of the cigarette circumference. The cigarette circumference adjusting device includes a cam mechanism and a pressing plate module. The pressing plate module cooperates with the cigarette gun component to form a cigarette rod forming channel. The cam mechanism is used to adjust the position of the pressing plate module to change the size of the cigarette rod forming channel and realize the adjustment of the cigarette circumference. The present application also provides a cigarette circumference adjusting system, which includes the cigarette circumference adjusting device as described above, a detection device and a control device. The driving mechanism is a servo motor, and the control device is connected to the detection device and the servo motor. The cigarette circumference adjusting device and system provided by the present application utilize the cam mechanism to cooperate with the pressing plate module to adjust the cigarette circumference, so as to realize the adjustment of the cigarette circumference, and have reasonable design, simple structure and convenient adjustment.

Description

Technical Field

[0001] The present application relates to the technical field of tobacco processing, and particularly to a cigarette circumference adjusting device and system. Background Art

[0002] The circumference of a cigarette is an important indicator of cigarette quality. During the cigarette production process, the circumference and diameter of a cigarette are important assessment indicators for cigarette process quality. The fluctuation of the circumference and diameter will directly affect the quality of the subsequent production process. Therefore, how to make the cigarette circumference meet the process requirements and remain stable during the production process is an urgent need for current cigarette enterprises.

[0003] Taking a double-flue unit as an example, the arc surfaces of the front and rear pressing plates and the arc surface of the cigarette gun form two cigarette rod forming channels. The cut tobacco and cigarette paper will enter the cigarette rod forming channels simultaneously to form cigarette rods. During the actual production process, affected by factors such as fluctuations in raw and auxiliary materials, part wear, and equipment performance, the circumference of the formed cigarette rod will inevitably fluctuate, affecting the quality of cigarette products.

[0004] How to conveniently adjust the cigarette circumference is a technical problem that needs to be urgently solved by those skilled in the art. Summary of the Invention

[0005] To solve the above technical problems, the object of the present invention is to provide a cigarette circumference adjusting device and system that can conveniently adjust the cigarette circumference.

[0006] The technical solution provided by the present invention is as follows:

[0007] A cigarette circumference adjusting device is used to cooperate with a cigarette gun component to form a cigarette rod forming channel and realize the adjustment of the cigarette circumference. The cigarette circumference adjusting device includes a cam mechanism and a pressing plate module. The pressing plate module cooperates with the cigarette gun component to form a cigarette rod forming channel. The cam mechanism is used to adjust the position of the pressing plate module to change the size of the cigarette rod forming channel and realize the adjustment of the cigarette circumference.

[0008] Preferably, the cam mechanism includes a driving mechanism, a rotating shaft, a cam, and a support rod. The rotating shaft is connected to the driving mechanism. The cam is installed on the rotating shaft. The support rod is movably installed above the cam and contacts the bottom of the cam. When the driving mechanism drives the cam to rotate through the rotating shaft, the support rod moves up and down accordingly. The pressing plate module includes a push rod mechanism and a movable pressing plate mechanism. The movable pressing plate mechanism includes a movable part and a fixed seat. The movable part is pivotally connected to the fixed seat and cooperates with the cigarette gun component at the bottom to form a cigarette rod forming channel. The push rod mechanism is connected to the movable part and is located directly above the support rod. When the support rod moves, it drives the push rod mechanism to move, and then drives the movable part to rotate relative to the fixed seat, causing the size of the cigarette rod forming channel to change.

[0009] Preferably, the driving mechanism is a motor. The cam mechanism further includes a motor base and a coupling. The motor base is installed on the cigarette gun component. The motor is installed at one end of the motor base, and the rotating shaft is located at the other end of the motor base and is connected to the motor through a coupling housed in the motor base.

[0010] Preferably, the cam mechanism further includes a first bearing, a second bearing, a needle bearing, and a flange. The inner rings of the first bearing and the second bearing are installed on the rotating shaft, and the outer rings are respectively fitted with the bearing holes of the motor base and the base of the cigarette gun component. The flange is installed at the end of the base of the cigarette gun component, and the needle bearing is installed between the end of the rotating shaft and the flange.

[0011] Preferably, the cam mechanism further includes a support sleeve. The support sleeve is vertically installed in a corresponding hole of the base of the cigarette gun component and is located above the cam. The support rod is movably housed in the support sleeve, so that the support rod is movably installed above the cam.

[0012] Preferably, the cam is provided with a pin hole. The cam mechanism further includes a stop pin. The stop pin is installed in the pin hole, and the pin hole is located at a position where the support rod contacts the stop pin at the zero position of the cam during the rotation of the cam.

[0013] Preferably, the ejector rod mechanism and the fixed seat are respectively located at both ends of the movable part. The distance between the ejector rod mechanism and the fixed seat is greater than the distance between the part of the movable part forming the cigarette rod forming channel and the fixed seat.

[0014] Preferably, the ejector rod mechanism includes an adjusting screw. The adjusting screw is threadedly connected to the movable part and is used to move the adjusting screw up and down by rotating the adjusting screw to drive the movable part to swing, so as to change the size of the cigarette rod forming channel.

[0015] A cigarette circumference adjusting device, characterized in that the ejector rod mechanism further includes a disc spring sleeve and a second disc spring. The adjusting screw passes through the disc spring sleeve and is connected to the movable part. The second disc spring is installed inside the disc spring sleeve and abuts against the movable part to eliminate the gap between the threads of the adjusting screw and the movable part.

[0016] Preferably, the pressing plate module further includes a top abutting part. The top abutting part is located above the movable part, and a top abutting spring for providing a downward pressure to the movable part is provided between the top abutting part and the movable part.

[0017] Preferably, it further includes a cover plate mechanism and a movable link mechanism; the movable pressing plate mechanism further includes a pivot shaft, a first hole is provided at the rear end of the movable part, and the movable part is pivotally connected to the fixed seat through the cooperation of the first hole and the pivot shaft; a second hole is provided at the upper part of the fixed seat, and the rear end of the cover plate mechanism is pivotally connected to the fixed seat through the cooperation of the cover plate shaft and the second hole; a fourth hole is provided on the cover plate mechanism, a hole seat is provided on the upper surface of the abutting member, a third hole is provided on the hole seat, and a fifth hole is provided at the rear end of the abutting member; the abutting member is installed above the rotating plate, and the rear end is pivotally connected to the fixed seat through the cooperation of the fifth hole and the pivot shaft; the movable link mechanism is located above the abutting member, and the front end is pivotally connected to the third hole so that the movable link mechanism is pivotally connected to the abutting member; the cover plate mechanism is located above the movable link mechanism, and the rear end of the movable link mechanism is pivotally connected to the fourth hole so that the cover plate mechanism is pivotally connected to the movable link mechanism; so that the cover plate mechanism, the movable link mechanism, the abutting member and the movable part form a four-bar mechanism, and when the movable part is in the working state, the four-bar mechanism forms a self-locking through the elastic force of the abutting spring.

[0018] Preferably, the cover plate mechanism includes a handle and a cover plate, the handle is fixed to the front end of the cover plate, the fourth hole is located on the cover plate, and the rear end of the cover plate is pivotally connected to the fixed seat.

[0019] Preferably, the movable link mechanism includes a front shaft, a rear shaft, a rod sleeve, a first disc spring, and a plunger. An oval hole is provided at the rear end of the rod sleeve. The front shaft is used to be installed in the third hole, the rear shaft is installed in the oval hole and is used to be installed in the fourth hole. The first disc spring is installed inside the rod sleeve, and the plunger is inside the rod sleeve, pressing the first disc spring at one end and abutting against the rear shaft at the other end.

[0020] Preferably, the abutting member and the movable part are connected by a limit screw. The limit screw passes through the corresponding hole of the abutting member and is fixed on the movable part to drive the rotating plate and the abutting member to rotate together. There is a gap between the limit screw and the hole wall of the corresponding hole of the abutting member so that the movable part and the abutting member can rotate relative to each other. The limit screw has a length dimension that will not interfere with other parts when moving.

[0021] A cigarette rod circumference adjustment system includes the cigarette rod circumference adjustment device, a detection device, and a control device as described above. The drive mechanism is a servo motor. The control device is connected to the detection device and the servo motor, and is used to receive the signal from the detection device and send an instruction to the servo motor to control the servo motor. The detection device is used to detect the circumference of the cigarette rod formed in the cigarette rod forming channel, and compare the detection result with the set value. When the detected cigarette rod circumference is less than the set value, a signal is sent to the control device, and the control device sends an instruction to the servo motor. The servo motor drives the cam to rotate, causing the support rod to move upward under the action of the cam, and then driving the ejector rod mechanism to move upward, driving the movable part to rotate upward, thereby increasing the cigarette rod forming channel and increasing the cigarette rod circumference. When the detected cigarette rod circumference is greater than the set value, a signal is sent to the control device, and the control device sends an instruction to the servo motor. The servo motor drives the cam to rotate, causing the support rod to move downward, and then the ejector rod mechanism moves downward, and the movable part also rotates downward, thereby reducing the cigarette rod forming channel and reducing the cigarette rod circumference.

[0022] Compared with the prior art, the cigarette rod circumference adjustment device and system of the present invention set a cam mechanism and a pressing plate module. The pressing plate module cooperates with the cigarette gun component to form a cigarette rod forming channel. The cam mechanism is used to adjust the position of the pressing plate module to change the size of the cigarette rod forming channel and realize the adjustment of the cigarette rod circumference. The cam mechanism is used in cooperation with the pressing plate module to adjust the cigarette rod circumference, so that the adjustment of the cigarette rod circumference can be realized, and the design is reasonable, the structure is simple, and the adjustment is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments recorded in the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0024] Figure 1 It is a three-dimensional view of the cigarette rod circumference adjustment device and the cigarette gun mechanism in the embodiment of the present invention;

[0025] Figure 2 For Figure 1 the three-dimensional view of the cigarette rod circumference adjustment device shown;

[0026] Figure 3 For Figure 1 the three-dimensional combined view of the cam mechanism in the cigarette rod circumference adjustment device shown;

[0027] Figure 4 For Figure 3 the three-dimensional exploded view of the cam mechanism shown;

[0028] Figure 5is Figure 3 A sectional view of the cam mechanism shown;

[0029] Figure 6 is Figure 3 A schematic diagram of the cam stroke design in the cam mechanism shown;

[0030] Figure 7 is Figure 1 An exploded perspective view of the pressure plate module in the cigarette circumference adjustment device shown;

[0031] Figure 8 is Figure 1 A perspective view of the cover plate mechanism in the cigarette circumference adjustment device shown;

[0032] Figure 9 is Figure 1 A perspective view of the movable connecting rod in the cigarette circumference adjustment device shown;

[0033] Figure 10 is Figure 9 A sectional view of the movable connecting rod shown;

[0034] Figure 11 is Figure 1 A perspective view of the movable pressure plate mechanism and the ejector rod mechanism in the cigarette circumference adjustment device shown;

[0035] Figure 12 is Figure 11 A sectional view of the movable pressure plate mechanism shown;

[0036] Figure 13 is Figure 11 A sectional view of the ejector rod mechanism shown;

[0037] Figure 14 Figure 11 A sectional view of the movable pressure plate mechanism (showing the limit screw);

[0038] Figure 15 is Figure 1 A simplified diagram of the downward movement of the four-bar mechanism formed by the cigarette circumference adjustment device shown;

[0039] Figure 16 is Figure 15 A simplified diagram of the upward movement of the four-bar mechanism shown;

[0040] Figure 17 is Figure 15 A simplified diagram of the movement trend of the four-bar mechanism during circumference adjustment shown;

[0041] Figure 18 is a schematic diagram of the swing arc length of the support rod and the limit screw

[0042] Reference numerals: 1. cigarette rod mechanism; 2. cam mechanism; 2.1 post-cam mechanism; 2.2 pre-cam mechanism; 3. pressing plate module; 4. servo motor; 5. motor base; 6. coupling; 7. first bearing; 8. rotating shaft; 9. support sleeve; 10. support rod; 11. needle roller bearing; 12. flange; 13. cam; 14. stop pin; 15. second bearing; 16. base; 17. cover mechanism; 18. movable link mechanism; 19. abutting member; 20. movable pressing plate mechanism; 21. first limit screw; 22. second limit screw; 23. handle; 24. cover plate; 25. cover plate shaft; 26. rear shaft; 27. front shaft; 28. rod sleeve; 29. first disc spring; 30. plunger; 31. post-cam rotating plate; 32. post-cam pressing plate; 33. pre-cam pressing plate; 34. pre-cam rotating plate; 35. first abutting spring; 36. second abutting spring; 37. pivot; 38. fixed seat; 39. post-cam ejector mechanism; 40. pre-cam ejector mechanism; 41. adjusting screw; 42. disc spring sleeve; 43. second disc spring Detailed implementation manners

[0043] In order to enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of this application.

[0044] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly disposed on the other element; when an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0045] It should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to this application.

[0046] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of this application, the meanings of "a plurality" and "several" are two or more, unless otherwise specifically defined.

[0047] It should be noted that the structures, ratios, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those skilled in this technology to understand and read, and are not used to limit the implementable conditions of this application. Therefore, they do not have substantial technical significance. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the effects that this application can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed in this application.

[0048] As Figure 1 and Figure 2 shown, in this embodiment, the cigarette circumference adjusting device mainly consists of a cam mechanism 2 and a pressing plate module 3. Among them, the pressing plate module 3 and the cigarette gun component 1 form two cigarette strip forming channels. This device mainly relies on the cam mechanism 2 to adjust the position of the pressing plate module 3, thereby changing the size of the cigarette strip forming channel and realizing the automatic adjustment of the cigarette circumference.

[0049] As Figure 3 、 Figure 4 and Figure 5 shown, the cam mechanism 2 is divided into two identical structures, mainly consisting of a servo motor 4, a motor base 5, a coupling 6, a first bearing 7, a rotating shaft 8, a support sleeve 9, a support rod 10, a needle bearing 11, a stop pin 14, a flange 12, a second bearing 15, and a cam 13, etc. The motor base 5 is installed on the base 16 of the cigarette gun component by screws. The servo motor 4, as a driving mechanism, is installed on the other end of the motor base 5 by screws. The rotating shaft 8 is connected to the servo motor 4 through the coupling 6. The inner rings of the first bearing 7 and the second bearing 15 are respectively installed on the shoulders on both sides of the rotating shaft 8, and the outer rings are respectively in contact and cooperation with the bearing holes on the motor base 5 and the base 16. The left end of the rotating shaft 8 is connected to the flange 12 through the needle bearing 11. The cam 13 is installed on the rotating shaft 8 by a key. The stop pin 14 is installed in the pin hole 13.1 of the cam 13. The support sleeve 9 is vertically installed in the hole of the base 16. The bottom of the support rod 10 contacts the cam 13. When the cam rotates, the support rod 10 moves up and down along the support sleeve 9 accordingly.

[0050] In other embodiments, a servo motor may not be used as the driving mechanism, but other types of motors may be used. Even without a motor, manual operation may be adopted. However, using a motor can facilitate operation. In particular, a servo motor is easy to control and can realize the automatic adjustment of the cigarette circumference.

[0051] like Figure 6 As shown, the cam 13 is an eccentric part. Since the stop pin 14 is installed on the pin hole 13.1 of the cam 13, when the servo motor 4 is started, the cam 13 rotates and the support rod 10 contacts the stop pin 14 at the zero position to achieve mechanical homing.

[0052] The distance from the center O of the cam hole to the zero point is r, and the distance from the center O to the high point is r+a, so the maximum stroke of the support rod is a

[0053] The displacement formula of the support rod is:

[0054]

[0055] Where: h is the displacement of the support rod; a is the maximum stroke of the support rod; θ is the angle of the cam starting from the 0 position; and the value range of t is 0 to 1.

[0056] like Figure 7 As shown, the pressure plate module 3 is mainly composed of a cover plate mechanism 17, a movable connecting rod mechanism 18, a push member 19 (also used as a rotating arm in this embodiment), a movable pressure plate mechanism 20, a front-track push rod mechanism 40 and a rear-track push rod mechanism 39.

[0057] like Figure 8 As shown, the cover mechanism 17 is mainly composed of a handle 23, a cover 24 and a cover shaft 25. The handle 23 is connected to the cover 24 by screws, and the cover shaft 25 passes through a hole on the cover 24 and is installed on the hole B (second hole) 52.

[0058] like Figure 9 and Figure 10 As shown, the movable linkage mechanism 18 is primarily composed of the rear axle 26, the front axle 27, the rod sleeve 28, the first disc spring 29, and the plunger 30. The front axle 27 passes through the hole in the rod sleeve 28 and is mounted on hole C (third hole) 53. The rear axle 26 passes through the round hole 56 of the rod sleeve 28 and is mounted on hole D (fourth hole) 54. The first disc spring 29 is mounted inside the rod sleeve 28. The plunger 30 is inside the rod sleeve 28, pressing the first disc spring 29 on one side and abutting the rear axle 26 on the other side. If the distance between hole C 53 and hole D 54 changes slightly during the swinging process, the rear axle 26 will move on the round hole 56. The plunger 30 will press against the axle 26 under the elastic force of the first disc spring 29, thus preventing a gap from forming between the rear axle 26 and the rear wall of the round hole 56.

[0059] See you next time Figure 7 As shown, the rear end of the push member 19 is pivotally connected to the fixed base 38 through the hole E (fifth hole) 55 and the pivot 37. The first limit screw 21 passes through the hole in the push member 19 and is connected to the front turn plate 34. The second limit screw 22 passes through the hole in the push member 19 and is connected to the rear turn plate 31.

[0060] As Figure 11 and Figure 12 shown, the movable platen mechanism 20 mainly consists of a rear transfer plate 31, a rear platen 32, a front transfer plate 34, a front platen 33, a first abutting spring 35, a second abutting spring 36, a pivot 37, and a fixed seat 38. The fixed seat 38 is installed on the base 16 by screws. The pivot 37 passes through the front transfer plate 34 and the rear transfer plate 31 and is installed on the hole A (the first hole) 51. The front transfer plate 34 is connected to the front platen 33 by screws to form a front moving part, and the rear transfer plate 31 is connected to the rear platen 32 by screws to form a rear moving part. The bottoms of the first abutting spring 35 and the second abutting spring 36 are respectively placed in the blind holes on the upper surfaces of the front transfer plate 34 and the rear transfer plate 31, and the tops of the first abutting spring 35 and the second abutting spring 36 are in contact with two spring holes on the bottom surface of the abutting member 19.

[0061] The front ejector rod mechanism 40 and the rear ejector rod mechanism 39 are exactly the same. Taking the rear one as an example, as Figure 13 shown, both are composed of an adjusting screw 41, a disc spring sleeve 42, and a second disc spring 43. The second disc spring 43 is installed inside the disc spring sleeve 42. The adjusting screw 41 passes through the disc spring sleeve 42 and the second disc spring 43 and is connected to the front transfer plate 33 or the rear transfer plate 31 by threads. The elastic force of the second disc spring 43 can effectively eliminate the thread clearance and keep the position of the adjusting screw rod 41 stable. The bottom of the adjusting screw rod 41 is in contact with the cam mechanism support rod 10.

[0062] The support rod 10 moves under the drive of the servo motor 4. When the support rod 10 moves upward, it pushes the adjusting screw rod 41 upward, driving the front transfer plate 33 or the rear transfer plate 31 to swing upward; when the support rod 10 moves downward, the adjusting screw rod 41 moves downward due to its own weight and the reaction force of the second disc spring 43, and the front transfer plate 33 or the rear transfer plate 31 swings downward.

[0063] The front ejector rod mechanism 40 and the rear ejector rod mechanism 39 mainly rely on manual adjustment to initially adjust the positions of the front platen 33 and the rear platen 32. By rotating the adjusting screw 41, the adjusting screw 41 moves up or down a small amount, thereby driving the front transfer plate 33 or the rear transfer plate 31 to swing up and down a small angle, changing the position of the front platen 33 or the rear platen 32 and altering the size of the cigarette rod forming channel.

[0064] See Figure 14 shown, the first limit screw 21 passes through the hole on the abutting member 19 and is connected to the front transfer plate 33. There is a gap between the first limit screw 21 and the hole of the abutting member 19. If it is necessary to open the entire platen module, pull the handle 23 upward, and the abutting member 19 rotates around the pivot 37. Under the action of the step of the first limit screw 21, the front platen 33 will be driven.

[0065] The pressing plate module has 4 pin shafts, forming a four-bar mechanism. When the pressing plate presses down, its kinematic diagram is as shown in Figure 1 the figure. A, B, C, and D respectively correspond to hole A, hole B, hole C, and hole D. During the rotation process, the limiting end face 191 of the abutting member 19 will first exactly fit with the wall 381 of the fixed seat 38 (see ​ the right figure). The abutting member 19 will not be able to rotate further. At this time, the working face 192 of the abutting member 19 is parallel to the front transfer plate 33 and the rear transfer plate 31, that is, AC reaches the preset position first and stops moving, and point C can no longer move. When the front pressing plate 33 or the rear pressing plate 32 continues to press down, the CD rod will rotate clockwise with C as the center, and the BD rod will rotate counterclockwise with B as the center. Therefore, during the process that point D moves past point D' on the BC connection line to D", the length of the CD rod will first decrease and then increase. The characteristics of the movable link mechanism can well meet this change requirement. When reaching D", the rear shaft 26 in the movable link mechanism is pushed to the limit position, and the length of the abutting member 19 reaches the longest. At this time, the pressing plate module has been completely pressed down to the working position.

[0066] See ​ the figure. When it is necessary to clean the pressing plate or the cigarette gun, lift the handle 23 upwards. The abutting member 19 moves first. D" moves past point D' on the BC connection line to point D. The length of the movable link mechanism first decreases and then increases until the rear shaft 26 is pushed to the limit position and the length of the movable link mechanism (i.e., CD) reaches the longest. At this time, CDB is equivalent to a rigid connection. When the handle 23 continues to rotate upwards, the abutting member (AC) will rotate around point A. Under the step action of the first limit screw 21 and the second limit screw 22, the abutting member 19 will drive the front transfer plate 33, the rear transfer plate 31, the front pressing plate 33, and the rear pressing plate 32 to rotate together until the front pressing plate 33 and the rear pressing plate 32 are completely opened.

[0067] When performing circular automatic adjustment, when the front pressing plate 33 and the rear pressing plate 32 are in the working state, due to the elastic forces of the first abutting spring 35 and the second abutting spring 36, an upward force will be generated on the abutting member 19, as shown in ​As shown in the figure, under the action of this force, AC has a clockwise rotation tendency around point A, CD has a clockwise rotation tendency around point C, and BD has a counterclockwise rotation tendency around point B. Due to space limitations, none of these three rotations can be achieved, resulting in a self-locking phenomenon. Therefore, during the circular automatic adjustment, the four-bar mechanism forms self-locking, which limits the position of the movable pressure plate mechanism. The first abutting spring 35 and the second abutting spring 36 cannot push open the abutting member 19, ensuring the stability of the pressure exerted by the first abutting spring 35 and the second abutting spring 36 on the front pressure plate 33 and the rear pressure plate 32, but not having other effects on the rotation of the front pressure plate 33 and the rear pressure plate 32. Therefore, when the servo motor 4 drives the cam 13 to rotate, it only needs to overcome the self-weights of the front rotating plate 33, the rear rotating plate 31, the front pressure plate 33, and the rear pressure plate 32, as well as the elastic forces of the first abutting spring 35 and the second abutting spring 36, without having to overcome the gravity of the entire pressure plate device. The torque borne by the servo motor 4 is small, and the torque change range is small. The working condition of the servo motor 4 is better, and the control accuracy is better, avoiding the situation of exceeding the torque control range of the servo motor 4.

[0068] Moreover, when there is too much tobacco cut filler incoming, under the action of the first abutting spring 35 and the second abutting spring 36, the front pressure plate 33 and the rear pressure plate 32 will not be pushed by the cigarette rod, minimizing the impact of the raw and auxiliary materials on the circumference of the cigarette.

[0069] During the circular automatic adjustment, the first limit screw 21 or the second limit screw 22 swings up and down along with the front rotating plate 33 or the rear rotating plate 31. Both the support rod 10 and the first limit screw 21 or the second limit screw 22 rotate around point A. The kinematic diagram is as ​ shown. The arc length of the rotation of the support rod 10 is H, and the arc length of the rotation of the first limit screw 21 or the second limit screw 22 is L. Then the relationship between the two is:

[0070]

[0071] During the automatic adjustment process, since the rotation angle α is very small, the arc length of the rotation of the support rod can be approximately equal to the linear distance of the up and down movement of the support rod.

[0072] That is, H≈h, then

[0073] So the maximum arc length of the limit screw

[0074] Therefore, the present invention designs the dimensions of the first limit screw 21 or the second limit screw 22 according to the arc length that the first limit screw 21 or the second limit screw 22 needs to rotate, ensuring that during the circular automatic adjustment, the first limit screw 21 or the second limit screw 22 can move without interfering with other parts.

[0075] This embodiment further provides a cigarette circumference adjustment system, which includes the cigarette circumference adjustment device, the detection device, and the control device as described above. The control device is connected to the detection device and the servo motor, and is used to receive the signal from the detection device and send an instruction to the servo motor to control the servo motor.

[0076] The detection device is used to detect the circumference of the cigarette rod formed in the cigarette rod forming channel, and compare the detection result with the set value. When the detected cigarette circumference is less than the set value, a signal is sent to the control device, and the control device sends an instruction to the servo motor. The servo motor drives the cam to rotate, causing the support rod to move upward under the action of the cam, thereby driving the ejector rod mechanism to move upward and driving the movable part to rotate upward, so as to increase the cigarette rod forming channel and increase the cigarette circumference. When the detected cigarette circumference is greater than the set value, a signal is sent to the control device, and the control device sends an instruction to the servo motor. The servo motor drives the cam to rotate, causing the support rod to move downward, and then the ejector rod mechanism moves downward, and the movable part also rotates downward, so as to reduce the cigarette rod forming channel and reduce the cigarette circumference.

[0077] During operation, the pressing plate module 3 and the cigarette gun mechanism 1 form a cigarette rod forming channel. Cut tobacco and cigarette paper are rolled into a cigarette rod in the cigarette rod forming channel, and the cigarette rod then enters the detection device for cigarette rod circumference detection.

[0078] When used for the first time, the pressing plate module 3 presses down to the working position. First, manually adjust the front ejector rod mechanism 40 and the rear ejector rod mechanism 39 to make a preliminary adjustment to the positions of the front pressing plate 33 and the rear pressing plate 32. First, adjust the cam 13 to the middle position (i.e., the position of the support rod h = a / 2), and then rotate the adjusting screw 41 to move up or down a small amount to drive the front rotating plate 34 and the rear rotating plate 31 to swing up and down by a small angle, so that the front pressing plate 33 and the rear pressing plate 32 also rotate by the same angle to change the size of the cigarette rod forming channel until the cigarette circumference detected by the detection device is relatively close to the set value, and then stop the adjustment. After the adjustment is completed, no manual adjustment is required anymore. The manual adjustments of the front and rear are also independent of each other and do not affect each other.

[0079] When performing circular automatic adjustment, taking the previous cigarette rod as an example for analysis, the detection device compares the detected result with the set value. When the circumference of the previous cigarette detected is smaller than the set value, a signal is sent to the control device, and the control device then sends an instruction to the corresponding servo motor 4. The servo motor drives the cam 13 to rotate, and the support rod 10 moves upward under the action of the cam 13, thereby driving the previous top rod mechanism 40 to move upward. Since the adjusting screw 41 in the top rod mechanism is connected to the previous rotating plate 34, and the previous rotating plate 34 is also connected to the previous pressing plate 33 by screws, when the previous top rod mechanism 40 moves upward, it will drive the previous pressing plate 33 to rotate upward around the pivot 37, thereby increasing the cigarette forming channel and increasing the circumference of the cigarette rod; when the circumference of the previous cigarette detected is larger than the set value, the previous pressing plate 33 rotates downward around the pivot 37, reducing the cigarette forming channel and decreasing the circumference of the cigarette rod, realizing the automatic control of the cigarette rod circumference.

[0080] The automatic control of the circumference of the subsequent cigarette rod is similar to that of the previous cigarette rod, and the control between the two is independent of each other and does not affect each other.

[0081] This embodiment is described by taking a double-flue unit as an example. This mechanism can be applied not only to double-flue units but also to single-flue or multi-flue units.

[0082] The advantages of this embodiment include:

[0083] 1. The cam mechanism adopts a rigid connection, ensuring the adjustment accuracy;

[0084] 2. The pressing plate module adopts a four-bar mechanism design and realizes self-locking in the working state;

[0085] 3. The servo motor has a better working condition and better control accuracy;

[0086] 4. It can independently perform automatic adjustment on the circumferences of the cigarette rods in the front and rear flues;

[0087] 5. When there is a problem with the automatic adjustment, the top rod mechanism can be used for manual adjustment.

[0088] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but rather will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A cigarette circumference adjusting device is used to cooperate with a cigarette gun component to form a cigarette rod forming channel and realize the adjustment of the cigarette circumference. It is characterized in that The cigarette rod circumference adjusting device includes a cam mechanism and a pressing plate module. The pressing plate module cooperates with the cigarette gun component to form a cigarette rod forming channel. The cam mechanism is used to adjust the position of the pressing plate module to change the size of the cigarette rod forming channel, so as to realize the adjustment of the cigarette rod circumference. The cam mechanism includes a driving mechanism, a rotating shaft, a cam, and a support rod. The rotating shaft is connected to the driving mechanism, the cam is installed on the rotating shaft, and the support rod is movably installed above the cam and contacts the bottom of the cam. When the driving mechanism drives the cam to rotate through the rotating shaft, the support rod moves up and down accordingly. The pressing plate module includes a push rod mechanism and a movable pressing plate mechanism. The movable pressing plate mechanism includes a movable part and a fixed seat. The movable part is pivotally connected to the fixed seat, and the bottom cooperates with the cigarette gun component to form a cigarette rod forming channel. The push rod mechanism is connected to the movable part and is located directly above the support rod. When the support rod moves, it drives the push rod mechanism to move, and then drives the movable part to rotate relative to the fixed seat, so that the size of the cigarette rod forming channel changes. The pressing plate module further includes a pressing member. The pressing member is located above the movable part, and a pressing spring for providing a downward pressure to the movable part is provided between the pressing member and the movable part.

2. The cigarette circumference adjusting device according to claim 1, characterized in that, The driving mechanism is a motor. The cam mechanism further includes a motor seat and a coupling. The motor seat is installed on the cigarette gun component. The motor is installed at one end of the motor seat, and the rotating shaft is located at the other end of the motor seat and is connected to the motor through a coupling housed in the motor seat.

3. The cigarette circumference adjusting device according to claim 2, characterized in that, The cam mechanism further includes a first bearing, a second bearing, a needle bearing, and a flange. The inner rings of the first bearing and the second bearing are installed on the rotating shaft, and the outer rings are respectively fitted with the bearing holes of the motor seat and the base of the cigarette gun component. The flange is installed at the end of the base of the cigarette gun component, and the needle bearing is installed between the end of the rotating shaft and the flange.

4. The cigarette circumference adjusting device according to claim 1, wherein The cam mechanism further includes a support sleeve. The support sleeve is vertically installed in the corresponding hole of the base of the cigarette gun component and is located above the cam. The support rod is movably received in the support sleeve, so that the support rod is movably installed above the cam.

5. The cigarette circumference adjusting device according to claim 1, characterized in that, The cam is provided with a pin hole. The cam mechanism further includes a stop pin. The stop pin is installed in the pin hole, and the pin hole is located at a position where the support rod contacts the stop pin at the zero position of the cam during the rotation of the cam.

6. The cigarette circumference adjusting device according to claim 1, characterized in that The push rod mechanism and the fixed seat are respectively located at both ends of the movable part. The distance between the push rod mechanism and the fixed seat is greater than the distance between the part of the movable part forming the cigarette rod forming channel and the fixed seat.

7. The cigarette circumference adjusting device according to claim 1, characterized in that The push rod mechanism includes an adjusting screw. The adjusting screw is threadedly connected to the movable part and is used to drive the movable part to swing by rotating the adjusting screw up and down, so as to change the size of the cigarette rod forming channel.

8. The cigarette circumference adjusting device according to claim 7, wherein, The push rod mechanism further includes a disc spring sleeve and a second disc spring. The adjusting screw passes through the disc spring sleeve and is connected to the movable part. The second disc spring is installed inside the disc spring sleeve and abuts against the movable part to eliminate the clearance between the threads of the adjusting screw and the movable part.

9. The cigarette circumference adjusting device according to claim 8, wherein It further includes a cover plate mechanism and a movable link mechanism; the movable pressure plate mechanism further includes a pivot shaft, and a first hole is provided at the rear end of the movable member. The movable member is pivotally connected to the fixed seat through the cooperation of the first hole and the pivot shaft; a second hole is provided at the upper part of the fixed seat, and the rear end of the cover plate mechanism is pivotally connected to the fixed seat through the cooperation of the cover plate shaft and the second hole; a fourth hole is provided on the cover plate mechanism, a hole seat is provided on the upper surface of the abutting member, a third hole is provided on the hole seat, and a fifth hole is provided at the rear end of the abutting member; the abutting member is installed above the rotating plate, and the rear end is pivotally connected to the fixed seat through the cooperation of the fifth hole and the pivot shaft; the movable link mechanism is located above the abutting member, and the front end is pivotally connected to the third hole so that the movable link mechanism is pivotally connected to the abutting member; the cover plate mechanism is located above the movable link mechanism, and the rear end of the movable link mechanism is pivotally connected to the fourth hole so that the cover plate mechanism is pivotally connected to the movable link mechanism; such that the cover plate mechanism, the movable link mechanism, the abutting member and the movable member form a four-bar mechanism, and when the movable member is in the working state, due to the elastic force of the abutting spring, the four-bar mechanism forms a self-locking state.

10. The cigarette circumference adjusting device according to claim 9, wherein, The cover plate mechanism includes a handle and a cover plate. The handle is fixed to the front end of the cover plate. The fourth hole is located on the cover plate, and the rear end of the cover plate is pivotally connected to the fixed seat.

11. The cigarette circumference adjusting device according to claim 9, characterized in that, The movable link mechanism includes a front shaft, a rear shaft, a rod sleeve, a first disc spring and a plunger. An oval hole is provided at the rear end of the rod sleeve. The front shaft is used for being installed in the third hole. The rear shaft is installed in the oval hole and is used for being installed in the fourth hole. The first disc spring is installed inside the rod sleeve. The plunger is inside the rod sleeve, one end presses the first disc spring and the other end abuts against the rear shaft.

12. The cigarette circumference adjusting device according to claim 9, characterized in that, The abutting member and the movable member are connected by a limit screw. The limit screw passes through the corresponding hole of the abutting member and is fixed on the movable member, and is used for driving the rotating plate and the abutting member to rotate together. There is a gap between the hole wall of the corresponding hole of the limit screw and the abutting member, so that the movable member and the abutting member can rotate relative to each other. The limit screw has a length dimension that will not interfere with other parts when moving.

13. A cigarette circumference adjustment system, characterized in that, It includes a cigarette circumference adjusting device as described in any one of claims 1 to 12, a detection device and a control device. The driving mechanism is a servo motor. The control device is connected to the detection device and the servo motor, and is used for receiving the signal of the detection device and sending an instruction to the servo motor to control the servo motor; the detection device is used for detecting the circumference of the cigarette rod formed in the cigarette forming channel, and comparing the detection result with a set value. When the detected cigarette circumference is less than the set value, a signal is sent to the control device. The control device sends an instruction to the servo motor. The servo motor drives the cam to rotate, so that the support rod moves upward under the action of the cam, and then drives the ejector rod mechanism to move upward, driving the movable member to rotate upward, thereby increasing the cigarette forming channel and increasing the cigarette circumference; when the detected cigarette circumference is greater than the set value, a signal is sent to the control device. The control device sends an instruction to the servo motor. The servo motor drives the cam to rotate, so that the support rod moves downward, and then the ejector rod mechanism moves downward, and the movable member also rotates downward, thereby reducing the cigarette forming channel and reducing the cigarette circumference.

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