A paper disc unwinding device and a paper disc replacement system

Abstract

The application discloses a paper disc unwinding device and a paper disc replacing system, and relates to the technical field of tobacco machines; the device comprises a driving mechanism, a rotating shaft mechanism and a locking mechanism; the rotating shaft mechanism comprises a bearing seat, a hollow shaft is rotatably arranged in the bearing seat, the hollow shaft is fixedly connected with a mandrel, and a first avoiding groove is arranged in the circumferential direction of the mandrel; the locking mechanism comprises a piston shaft, the piston shaft is connected with the mandrel through a sliding key, the piston shaft can be axially moved and adjusted relative to the mandrel, a second avoiding groove is arranged in the circumferential direction of the piston shaft, the second avoiding groove is aligned with the first avoiding groove and avoids a robot gripper for grabbing the paper disc, the piston shaft has a conical surface, the locking block is arranged on the conical surface of the piston shaft, the locking block can be radially moved and adjusted relative to the mandrel by using the conical surface of the piston shaft, so that the paper disc is locked when the locking block is extended and is loosened when the locking block is retracted. The paper disc unwinding device does not need to replace any size parts for different cigarette specifications, and can adapt to the full-automatic installation of the paper disc by the robot.

Description

Technical Field

[0001] This application relates to the field of tobacco machinery technology, and in particular to a paper tray unwinding device. It also relates to a paper tray changing system including the paper tray unwinding device. Background Technology

[0002] In cigarette manufacturing equipment, a paper tray unloading device is equipped with paper tray material, and the paper tray material is supplied by rotating the paper tray.

[0003] Currently, when producing cigarettes of different diameters and lengths on the same equipment, a large number of standard parts need to be replaced to adapt to the production of cigarettes of different specifications. Each standard part has several different sizes depending on the cigarette specifications, resulting in high spare parts costs and time-consuming and labor-intensive replacements. With the continuous improvement of equipment intelligence, it is an inevitable trend for robots to replace manual paper trays in cigarette production. However, the current paper tray unloading device on the equipment cannot cooperate with robots to complete the paper tray replacement. Summary of the Invention

[0004] The purpose of this application is to provide a paper tray unloading device that eliminates the need to change any specifications of paper trays required for different cigarette sizes, and can be adapted for fully automated installation by a robot. Another purpose of this application is to provide a paper tray changing system that includes the paper tray unloading device.

[0005] To achieve the above objectives, this application provides a paper tray unwinding device, including a drive mechanism, a rotating shaft mechanism, and a locking mechanism;

[0006] The drive mechanism includes a servo motor, which provides power to the rotating shaft mechanism;

[0007] The rotating shaft mechanism includes a bearing housing, in which the hollow shaft is rotatably mounted, and a spindle is fixedly connected to the hollow shaft. A first clearance groove is provided in the circumferential direction of the spindle.

[0008] The locking mechanism includes a piston shaft connected to the spindle via a sliding key. The piston shaft is axially movable relative to the spindle. A second clearance groove is provided circumferentially on the piston shaft. The second clearance groove is aligned with the first clearance groove and is used to avoid the robotic gripper that grasps the paper tray. The piston shaft has a tapered surface with a locking block on the tapered surface. The locking block is used to achieve radially movable adjustment relative to the spindle using the tapered surface of the piston shaft, so that the paper tray is locked when the locking block extends and relaxed when it retracts.

[0009] In some embodiments, the rotating shaft mechanism further comprises a sealing ring arranged between the bearing seat and the hollow shaft, the locking mechanism further comprises a piston installed inside the hollow shaft, the piston is connected with the piston shaft, a pipe joint is installed on the bearing seat, the hollow shaft is provided with a ventilation hole, the piston divides the inside of the hollow shaft into a first chamber and a second chamber, the first chamber, the ventilation hole and the pipe joint are in communication;

[0010] Wherein, the maximum stroke of the axial movement of the piston shaft is L, the taper of the conical surface of the piston shaft is θ, the maximum stroke and the taper of the piston shaft satisfy the relationship: Wherein, d max and d min are the maximum and minimum inner diameter sizes of the inner core in the paper tray series specifications, respectively.

[0011] In some embodiments, the locking mechanism further comprises a first elastic member, the first elastic member is installed in the second chamber, and the two ends of the first elastic member are in contact with the piston and the mandrel, respectively.

[0012] In some embodiments, the rotating shaft mechanism further comprises an end cover, the end cover is fixedly connected with the mandrel, a third avoiding slot is circumferentially arranged on the end cover, the third avoiding slot, the second avoiding slot and the first avoiding slot are aligned and used to avoid the robot gripper grabbing the paper tray.

[0013] In some embodiments, the first elastic member is a first spring in a compressed state, the first spring is used to drive the piston shaft to move axially towards the hollow shaft, the conical surface of the piston shaft is gradually expanded in the direction from the hollow shaft to the end cover, so that the locking block extends outward to lock the paper tray when the piston shaft moves towards the hollow shaft.

[0014] In some embodiments, the locking mechanism further comprises a gland, the gland is fixedly connected with the mandrel, the gland is provided with a slide rod, the locking block is provided with an oil-free bushing, the oil-free bushing is sleeved on the slide rod, the slide rod is externally sleeved with a second elastic member, and the two ends of the second elastic member are in contact with the gland and the locking block, respectively.

[0015] In some embodiments, the locking mechanism further comprises a rotating member, the rotating member is rotatably installed on the locking block, and the rotating member is in rolling contact with the conical surface of the piston shaft.

[0016] In some embodiments, the second elastic member is a second spring in a compressed state, the second spring is used to drive the locking block to move towards the piston shaft, so that the rotating member is in close contact with the conical surface of the piston shaft.

[0017] In some embodiments, the paper disc unwinding device further comprises a positioning mechanism, the positioning mechanism comprises a positioning sleeve, the mandrel is externally provided with external threads, the positioning sleeve is provided with internal threads matched with the external threads of the mandrel, the positioning sleeve is provided with a third fastener and a pad, the pad is located between the third fastener and the mandrel, and the third fastener is used to fix the positioning sleeve and the mandrel.

[0018] The paper disc replacement system provided by the present application comprises the paper disc unwinding device and further comprises a robot, the robot comprises a robot gripper, and the robot gripper is used to install and dismount the paper disc in the paper disc unwinding device.

[0019] With respect to the background art described above, the paper disc unwinding device provided by the present application comprises a driving mechanism, a rotating shaft mechanism and a locking mechanism. The driving mechanism comprises a servo motor, and the servo motor is used to provide power to the rotating shaft mechanism. The rotating shaft mechanism comprises a bearing seat, a hollow shaft is rotatably installed in the bearing seat, the hollow shaft is fixedly connected with a mandrel, and the mandrel is circumferentially provided with a first avoiding groove. The locking mechanism comprises a piston shaft, the piston shaft is connected with the mandrel through a sliding key, the piston shaft is axially movable for adjustment relative to the mandrel, the piston shaft is circumferentially provided with a second avoiding groove, the second avoiding groove is aligned with the first avoiding groove and is used to avoid the robot gripper for grabbing the paper disc, the piston shaft has a conical surface, the locking block is located on the conical surface of the piston shaft, and the locking block is used to realize radial movement adjustment relative to the mandrel by using the conical surface of the piston shaft, so as to lock the paper disc when the locking block is extended and release the locking of the paper disc when the locking block is retracted.

[0020] In the use process of the paper disc unwinding device, the servo motor provides power, the hollow shaft drives the mandrel to rotate, the mandrel drives the piston shaft and the locking block to rotate, so that the paper disc installed on the mandrel and locked by the locking block rotates synchronously with the servo motor, thereby accurately completing the unwinding process. The piston shaft is axially movable for adjustment relative to the mandrel, the locking block realizes radial movement adjustment relative to the mandrel by using the conical surface of the piston shaft, the paper disc is locked when the locking block is extended and the locking of the paper disc is released when the locking block is retracted, and different specifications of the paper disc are met. The paper disc unwinding device does not need to replace any specification parts for different paper discs required for different cigarette specifications, and can adapt to the full-automatic installation of the robot for the paper disc. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the provided drawings.

[0022] Figure 1A structural schematic diagram of a paper disc replacement system provided by an embodiment of the present application;

[0023] Figure 2 A structural schematic diagram of a paper disc unwinding device provided by an embodiment of the present application;

[0024] Figure 3 A structural schematic diagram of a paper disc unwinding device provided by an embodiment of the present application when the paper disc is locked;

[0025] Figure 4 A structural schematic diagram of a paper disc unwinding device provided by an embodiment of the present application when the paper disc is released;

[0026] Figure 5 A split schematic diagram of a locking block and a mandrel provided by an embodiment of the present application;

[0027] Figure 6 A layout schematic diagram of a locking block and a mandrel provided by an embodiment of the present application;

[0028] Figure 7 A structural schematic diagram of a positioning screw sleeve and a mandrel provided by an embodiment of the present application;

[0029] Figure 8 A connection schematic diagram of a positioning screw sleeve and a mandrel provided by an embodiment of the present application;

[0030] Figure 9 A split schematic diagram of a mandrel, a piston shaft, an end cover and a robot hand claw provided by an embodiment of the present application;

[0031] Figure 10 A layout schematic diagram of a mandrel, a piston shaft, an end cover and a robot hand claw provided by an embodiment of the present application;

[0032] Figure 11 A reset schematic diagram of a mandrel provided by an embodiment of the present application.

[0033] Wherein:

[0034] 1-servo motor, 2-coupling, 3-mounting seat, 4-wall plate, 5-sealing ring, 6-hollow shaft, 7-piston shaft, 8-second elastic member, 9-end cover, 10-robot hand claw, 11-paper disc, 12-locking block, 13-mandrel, 14-positioning screw sleeve, 15-sliding key, 16-first elastic member, 17-piston, 18-tube joint, 19-bearing seat, 601-vent hole, 602-bearing, 1201-first fastener, 1202-pressing cover, 1203-second fastener, 1204-sliding rod, 1205-oil-free bushing, 1206-rotating member, 1301-mandrel scale line, 13011-zero scale line, 1401-positioning screw sleeve identification line, 1402-third fastener, 1403-pad pressing member. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0036] In order for those skilled in the art to better understand the technical solutions of the present application, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0037] With the diversification of cigarette specifications and the increasing demand for personalization, different specifications of cigarettes need to be produced. When the same equipment produces cigarettes of different diameters and lengths, a large number of specification parts need to be replaced to adapt to the production of different specifications of cigarettes. When different width, inner and outer diameter paper disc consumables are used, the equipment needs to replace several specification parts, and each specification part has several different specification sizes according to different specifications of cigarettes. For a long time, the equipment not only needs a large number of spare parts cost, but also takes a lot of time and effort to replace the specification parts, which does not meet the development needs of equipment flexibility. With the continuous improvement of the degree of intelligent development of equipment, it is an inevitable trend to replace the paper disc by robots in cigarette production. However, the paper disc replacement device on the equipment cannot cooperate with the robot to replace the paper disc.

[0038] For those skilled in the art, it is of great significance to design a paper disc unwinding and replacing device that can minimize or even eliminate the need to replace specification parts and can automatically replace the paper disc with the cooperation of robots for the paper disc required for different specifications of cigarettes. It is also an inevitable requirement for the future development of flexible and intelligent cigarette equipment.

[0039] In view of the above technical problems, the present application provides a paper disc unwinding device, please refer to Figure 1 , Figure 1 The structure diagram of the paper disc replacing system provided by the embodiments of the present application.

[0040] As Figure 1As shown, the paper disc unwinding device mainly comprises a driving mechanism, a rotating shaft mechanism and a locking mechanism. The driving mechanism provides power to the rotating shaft mechanism. The rotating shaft mechanism is used to install and rotate the paper disc 11. The locking mechanism is used to lock and release the paper disc 11 on the rotating shaft mechanism, and the locking mechanism can meet the paper discs 11 of different diameters. In a further optional scheme, the paper disc unwinding device further comprises a positioning mechanism. The positioning mechanism is used to position the paper disc 11 at a predetermined position of the rotating shaft mechanism, so as to facilitate the locking of the locking mechanism. The positioning mechanism can meet the paper discs 11 of different widths.

[0041] For the driving mechanism, the servo motor 1 is used to provide power to the rotating shaft mechanism. The servo motor 1 can be connected to the rotating shaft in the rotating shaft mechanism in the form of a shaft coupling. The servo motor 1 ultimately realizes the rotation control of the paper disc 11 on the rotating shaft mechanism.

[0042] For the rotating shaft mechanism, the hollow shaft 6 is rotatably installed in the bearing seat 19. The hollow shaft 6 is hollow inside, and can rotate around its center axis in the bearing seat 19. The hollow shaft 6 is limited in the bearing seat 19 and cannot move axially. The hollow shaft 6 is fixedly connected with the mandrel 13, and the mandrel 13 is located at the end side outside the bearing seat 19. The mandrel 13 is provided with a first avoiding groove in the circumferential direction. The first avoiding groove is used to avoid the robot gripper 10 grabbing the paper disc 11.

[0043] For the locking mechanism, the piston shaft 7 is connected with the mandrel 13 through the slide key 15. The piston shaft 7 can be axially adjusted relative to the mandrel 13. The center axes of the piston shaft 7, the mandrel 13 and the hollow shaft 6 are collinear. The piston shaft 7 is provided with a second avoiding groove in the circumferential direction. The second avoiding groove is aligned with the first avoiding groove. The second avoiding groove is used to avoid the robot gripper 10 grabbing the paper disc 11. The piston shaft 7 has a conical surface on the outer periphery. The piston shaft 7 is provided with a locking block 12 on the conical surface. The locking block 12 is installed in the mandrel 13. The locking block 12 is used to realize the radial adjustment of the piston shaft 7 relative to the mandrel 13 by using the conical surface of the piston shaft 7. When the locking block 12 is extended, the paper disc 11 is locked. When the locking block 12 is retracted, the paper disc 11 is released.

[0044] It should be noted that the present embodiment only limits the adjustment mode that the piston shaft 7 can move axially relative to the mandrel 13. The specific adjustment structure has various implementation forms, such as driving the mandrel 13 to move by using gas, or driving the mandrel 13 to move by using an electric cylinder, or others, which should belong to the scope of the present embodiment.

[0045] In the use of the paper disc unwinding device, the servo motor 1 provides power, the hollow shaft 6 drives the spindle 13 to rotate, the spindle 13 drives the piston shaft 7 and the locking block 12 to rotate, so that the paper disc 11 installed on the spindle 13 and locked by the locking block 12 rotates synchronously with the servo motor 1, thereby accurately completing the unwinding process. Among them, the piston shaft 7 can be axially adjusted relative to the spindle 13, the locking block 12 uses the tapered surface of the piston shaft 7 to realize radial adjustment relative to the spindle 13, and when the locking block 12 is extended, it locks the paper disc 11, and when it is retracted, it loosens the locking of the paper disc 11. The radial travel of the locking block 12 covers paper discs 11 of different inner diameter specifications and can always lock the paper disc 11 when extended.

[0046] The paper disc unwinding device does not need to replace any specification parts for different paper discs required for different cigarette specifications, and can adapt to full-automatic installation of the paper disc by the robot.

[0047] Please refer to Figure 2 , Figure 2 The paper disc unwinding device provided by the embodiment of the application is shown in the structural schematic diagram.

[0048] As shown in Figure 2 , as an option, the servo motor 1 is installed on the mounting seat 3, the mounting seat 3 is fixed on the bearing seat 19, the bearing seat 19 is fixed on the wall plate 4, and the motor shaft of the servo motor 1 is fixedly connected with the hollow shaft 6 through the shaft coupling 2. The bearing 602 is arranged between the bearing seat 19 and the hollow shaft 6, the hollow shaft 6 is fixed with the spindle 13 through screws, and the spindle 13 transmits torque to the piston shaft 7 through the locking block 12, so that the paper disc 11 installed on the spindle 13 and locked by the locking block 12 rotates synchronously with the servo motor 1.

[0049] In a specific embodiment, the spindle 13 is driven by compressed gas, and the shaft mechanism is correspondingly provided with a sealed environment and an inlet position, so as to drive the spindle 13 by using compressed gas.

[0050] Please refer to Figure 3 and Figure 4 , Figure 3 The paper disc unwinding device provided by the embodiment of the application is shown in the structural schematic diagram when the paper disc is locked, Figure 4 The paper disc unwinding device provided by the embodiment of the application is shown in the structural schematic diagram when the paper disc is loosened.

[0051] For the shaft mechanism, the sealing ring 5 is arranged between the bearing seat 19 and the hollow shaft 6, and the front and rear parts of the hollow shaft 6 are sealed under the action of the sealing ring 5, so that the compressed air does not leak along the outer wall of the hollow shaft 6. The pipe joint 18 is installed on the bearing seat 19, the hollow shaft 6 is provided with the air hole 601, the air hole 601 is located at the position corresponding to the air inlet of the pipe joint 18, and the pipe joint 18 is in communication with the air hole 601.

[0052] For the locking mechanism, the piston 17 is installed inside the hollow shaft 6, a seal is formed between the outer periphery of the piston 17 and the inner wall of the hollow shaft 6, and the central position of the piston 17 is connected with the piston shaft 7. The piston 17 divides the inside of the hollow shaft 6 into a first chamber and a second chamber, the first chamber is in communication with the air hole 601, and then the first chamber, the air hole 601 and the pipe joint 18 are in communication, so that compressed air can enter the first chamber of the hollow shaft 6 through the pipe joint 18 on the bearing seat 19 and the air hole 601 on the hollow shaft 6 to drive the piston 17 and the piston shaft 7 to move.

[0053] Please continue to refer to Figure 1 In some embodiments, the locking mechanism further comprises a first elastic member 16, the first elastic member 16 is installed in the second chamber, and the two ends of the first elastic member 16 are in contact with the piston 17 and the mandrel 13 respectively.

[0054] In this embodiment, the first elastic member 16 provides an elastic force in the second chamber. Because the mandrel 13 is fixed with the hollow shaft 6 by screws, the hollow shaft 6 is limited in the bearing seat 19 and cannot move axially, and the mandrel 13 and the hollow shaft 6 cannot move axially, and the two ends of the first elastic member 16 are in contact with the piston 17 and the mandrel 13 respectively, so the elastic force of the first elastic member 16 acts on the piston 17 to make the piston 17 and the piston shaft 7 move.

[0055] It should be noted that the direction in which the first elastic member 16 moves the piston 17 and the piston shaft 7 is opposite to the direction in which the compressed air moves the piston 17 and the piston shaft 7, in other words, the compressed air moves the piston 17 and the piston shaft 7 from the initial position in the first direction, and then when there is no compressed air, the first elastic member 16 moves the piston 17 and the piston shaft 7 in the second direction opposite to the first direction back to the initial position, and the first elastic member 16 can achieve a similar reset effect.

[0056] If the effect of the compressed air is that the locking block 12 extends, the effect of the first elastic member 16 is that the locking block 12 retracts, and vice versa, if the effect of the compressed air is that the locking block 12 retracts, the effect of the first elastic member 16 is that the locking block 12 extends, no matter which way it belongs to the scope of the description of this embodiment.

[0057] In some embodiments, the rotating shaft mechanism further comprises an end cover 9, the end cover 9 is fixedly connected with the mandrel 13, and a third avoiding slot is arranged in the circumferential direction of the end cover 9, the third avoiding slot, the second avoiding slot and the first avoiding slot are aligned and used to avoid the robot gripper 10 grabbing the paper tray 11.

[0058] The first elastic member 16 is a first spring in compression, which drives the piston shaft 7 to move towards the hollow shaft 6. The conical surface of the piston shaft 7 is gradually expanded in the direction from the hollow shaft 6 to the end cover 9, so that the locking block 12 extends outwards to lock the paper tray 11 when the piston shaft 7 moves towards the hollow shaft 6.

[0059] Please refer to Figure 5 and Figure 6 , Figure 5 The split schematic view of the locking block and the mandrel provided by the embodiment of the present application, Figure 6 The layout schematic view of the locking block and the mandrel provided by the embodiment of the present application.

[0060] In some embodiments, taking one locking block 12 as a reference, the locking mechanism further comprises two gland nuts 1202, which are fixedly connected with the mandrel 13 through first fasteners 1201, and one locking block 12 is located between the two gland nuts 1202. Each gland nut 1202 is provided with a slide rod 1204, and the two slide rods 1204 are fixed with the two gland nuts 1202 respectively through second fasteners 1203. One oilless bushing 1205 is installed on each side of the locking block 12, and the outer sides of the two slide rods 1204 are respectively sleeved with second elastic members 8 and inserted into the oilless bushings 1205. The locking block 12 can move along the slide rods 1204, and the two ends of the second elastic members 8 are respectively in contact with the gland nuts 1202 and the locking block 12.

[0061] In this embodiment, the second elastic members 8 provide elastic force between the gland nuts 1202 and the locking block 12. Because the gland nuts 1202 and the slide rods 1204 are fixedly connected with the mandrel 13, neither the gland nuts 1202 nor the slide rods 1204 can move, while the two sides of the locking block 12 can move in the oilless bushings 1205 through the slide rods 1204 and the second elastic members 8. Therefore, the elastic force of the second elastic members 8 acts on the locking block 12, so that the locking block 12 performs radial expansion and contraction action under the action of the elastic force.

[0062] In some embodiments, the locking mechanism further comprises a rotating member 1206, which is rotatably installed on the locking block 12, and the rotating member 1206 is in rolling contact with the conical surface of the piston shaft 7.

[0063] In this embodiment, the rotating member 1206 can adopt a pair of bearings. The function of the rotating member 1206 is to reduce the movement resistance of the locking block 12 and the conical surface of the piston shaft 7. When the piston shaft 7 moves axially relative to the mandrel 13, the rotating member 1206 rolls on the conical surface of the piston shaft 7, and at the same time, the piston shaft 7 realizes radial movement, i.e. expansion and contraction action, relative to the mandrel 13.

[0064] For example, the second elastic member 8 is a second spring in a compressed state, and the second spring is used to drive the locking block 12 to move towards the piston shaft 7, so that the rotating member 1206 is in close contact with the conical surface of the piston shaft 7.

[0065] In a specific embodiment, the use of the paper disc unwinding device is described as follows.

[0066] As shown in Figure 3 , when the compressed air is disconnected, the pipe joint 18 is not connected to the compressed air, and the restoring force of the first elastic member 16 drives the piston shaft 7 to move towards the hollow shaft 6, and the air in the first chamber is discharged from the pipe joint 18 through the air hole 601, at this time, the locking block 12 is extended outward under the action of the conical surface of the piston shaft 7 to lock the paper disc 11, and the locking position of the locking block 12 to the paper disc 11 is the inner core of the paper disc 11.

[0067] As shown in Figure 4 , when the compressed air is turned on, the pipe joint 18 is connected to the compressed air, and the compressed air enters the first chamber through the air hole 601, and the pressure of the compressed air overcomes the restoring force of the first elastic member 16 and drives the piston 17 and the piston shaft 7 to move towards the end cover 9 until the piston shaft 7 contacts the end cover 9, at this time, the locking block 12 is always in close contact with the conical surface of the piston shaft 7 under the action of the restoring force of the second elastic member 8, and the locking block 12 is retracted inward under the action of the conical surface of the piston shaft 7 to separate from the inner core of the paper disc 11, so that the paper disc 11 is in a relaxed state, so as to facilitate the robot hand 10 to remove the paper disc 11, or wait for the robot hand 10 to install the paper disc 11.

[0068] It should be noted that the maximum stroke of the piston shaft 7 and the taper satisfy the relationship: wherein L is the maximum stroke of the piston shaft 7, d max and d min are the maximum and minimum inner diameter sizes of the inner core in the series of specifications of the paper disc 11, and θ is the taper of the conical surface of the piston shaft 7.

[0069] For the first elastic member 16, the restoring force at the minimum compression amount can ensure that the locking block 12 locks the paper disc 11, and the restoring force at the maximum compression amount is smaller than the pressure of the compressed air. For the second elastic member 8, the minimum restoring force can make the locking block 12 retract inward at the lowest position to overcome the gravity and friction.

[0070] Based on the above description, the above conditions are met to enable the locking block 12 to lock all paper discs 11 with different inner core specifications in a predetermined range.

[0071] Please refer to Figure 7 and Figure 8 , Figure 7 the structure diagram of the positioning screw and the mandrel provided by the embodiment of the application, Figure 8The connection diagram of the positioning screw sleeve and the mandrel provided by the embodiment of the application.

[0072] In some embodiments, the paper disc unwinding device further comprises a positioning mechanism, which comprises a positioning screw sleeve 14 mounted on the mandrel 13, and the distance between the width center of the paper disc 11 and the wallboard 4 is a constant value by axially positioning the paper disc 11, thereby adapting to paper discs 11 of different width specifications. The mandrel 13 is externally provided with external threads, the positioning screw sleeve 14 is provided with internal threads matched with the external threads of the mandrel 13, the positioning screw sleeve 14 is provided with a third fastener 1402 and a pad 1403, the pad 1403 is located between the third fastener 1402 and the mandrel 13, and the third fastener 1402 is used to fix the positioning screw sleeve 14 and the mandrel 13.

[0073] In the embodiment, the positioning screw sleeve 14 is mounted on the mandrel 13 through threads and is fixed at an arbitrary axial position through the third fastener 1402, and the pad 1403 can be a copper block and serves to protect the threaded surface. When the paper disc 11 is loaded, the paper disc 11 is first attached to the end face of the positioning screw sleeve 14 and then is locked and fixed through the locking block 12.

[0074] Further, a positioning screw sleeve identification line 1401 is engraved on the end face of the positioning screw sleeve 14 in contact with the paper disc 11, and a plurality of circumferentially divided mandrel scale lines 1301 are engraved on the threaded end face of the mandrel 13, and it is set that when the zero scale line 13011 of the mandrel scale line 1301 is aligned with the positioning screw sleeve identification line 1401, the threaded end face of the mandrel 13 is flush with the end face of the positioning screw sleeve 14.

[0075] When the paper disc 11 of a different width specification is replaced, the axial position of the positioning screw sleeve 14 is only required to be adjusted according to the width size of the paper disc 11, so that the axial center position of the paper disc 11 is unchanged. The adjustment method is as follows.

[0076] If the minimum width specification of the paper disc 11 is B0, at this time, the positioning screw sleeve identification line 1401 of the positioning screw sleeve 14 is aligned with the zero scale line 13011 of the mandrel 13, the end face of the positioning screw sleeve 14 is flush with the threaded end face of the mandrel 13, and the paper disc 11 with a width of B0 is accurately installed in place. If the paper disc 11 with a width specification of B1 is replaced, only the third fastener 1402 on the locking screw sleeve 14 is loosened, the positioning screw sleeve 14 is rotated clockwise (right-handed thread) or counterclockwise (left-handed thread) by P / 2, and then the third fastener 1402 is tightened. Wherein P is the thread pitch of the positioning screw sleeve 14 and the mandrel 13.

[0077] Based on the above description, the above conditions can satisfy the axial positioning of paper discs 11 of different width specifications within a predetermined range.

[0078] Please refer to Figure 9 andFigure 10 , Figure 9 The split schematic view of the mandrel, the piston shaft, the end cover and the robot hand claw provided by the embodiment of the present application, Figure 10 The layout schematic view of the mandrel, the piston shaft, the end cover and the robot hand claw provided by the embodiment of the present application.

[0079] The paper disc changing system provided by the present application comprises the paper disc unwinding device, and further comprises a robot, and should have all the beneficial effects of the paper disc unwinding device.

[0080] In the embodiment, the robot comprises a robot hand claw 10, which is used to install and dismount the paper disc 11 in the paper disc unwinding device.

[0081] For example, the mandrel 13, the piston shaft 7 and the end cover 9 are provided with a plurality of uniformly distributed fan-shaped grooves in the circumferential direction, and the number of the fan-shaped grooves is consistent and circumferentially aligned, and the robot hand claw 10 has a number of consistent supporting points, which are circumferentially away from the mandrel 13, the piston shaft 7 and the end cover 9 when the paper disc 11 is grabbed.

[0082] Please refer to Figure 11 , Figure 11 The reset schematic view of the mandrel provided by the embodiment of the present application.

[0083] In order to ensure that the robot hand claw 10 and the mandrel 13, the piston shaft 7 and the end cover 9 do not interfere with each other when the paper disc 11 is replaced, the servo motor 1 controls the mandrel 13, the piston shaft 7 and the end cover 9 to rotate to a certain initial angle before the robot hand claw 10 takes the material, so that the zero scale line 13011 of the mandrel 13 is located at the highest position, and the robot hand claw 10 is rotated to an initial angle offset from the zero scale line 13011, so as to ensure that the robot hand claw 10 can axially adhere the paper disc 11 to the end face of the positioning screw sleeve 14 without interference when the paper disc 11 is installed.

[0084] Based on the above description, the above conditions can make the paper disc unwinding device adapt to the full-automatic replacement of the paper disc 11 by the robot.

[0085] The paper disc unwinding device and the paper disc changing system solve the problem that when the paper supply device of the current cigarette equipment uses different specifications of paper disc materials for different specifications of cigarettes, a plurality of corresponding specifications of parts need to be replaced, thereby saving the spare part cost of the equipment and promoting the flexible development of the equipment; and the paper disc can be installed and unloaded in cooperation with the robot, thereby improving the intelligent degree of the equipment.

[0086] It should be noted that the many components mentioned in the present application are all general standard components or components known to those skilled in the art, and their structures and principles can be known by the technical personnel through technical manuals or through conventional experimental methods.

[0087] It should be noted that the relational terms herein, such as first and second, and the like, are used solely to distinguish one from another entity without necessarily requiring or implying any actual relationship or order between such entities.

[0088] The paper disc unwinding device and the paper disc replacing system provided by the present application are described in detail above. The principles and implementation manners of the present application are described by applying specific examples in this paper, and the above description of the examples is only used to help understand the method of the present application and its core idea. It should be pointed out that, for ordinary skilled persons in the technical field, some improvements and modifications can be made to the present application without departing from the principles of the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A paper disc replacing system characterized by comprising: The paper disc unwinding device comprises a robot, and the robot comprises a robot hand claw used for mounting and dismounting the paper disc in the paper disc unwinding device. The driving mechanism comprises a servo motor used for providing power to the rotating shaft mechanism. The rotating shaft mechanism comprises a bearing seat, a hollow shaft rotatably installed in the bearing seat, and a core shaft fixedly connected to the hollow shaft. The locking mechanism comprises a piston shaft connected to the core shaft through a sliding key, and the piston shaft is axially movable and adjustable relative to the core shaft. The piston shaft has a tapered surface, and the locking mechanism comprises a locking block on the tapered surface of the piston shaft. Wherein, the maximum stroke of the axial movement of the piston shaft is L, the taper of the conical surface of the piston shaft is , the maximum stroke and the taper of the piston shaft satisfy the relationship: , wherein and are the maximum and minimum inner diameter sizes of the inner core in the paper tray series specifications, respectively. The locking block is radially movable and adjustable relative to the core shaft to lock the paper disc when the locking block is extended and to release the paper disc when the locking block is retracted. The rotating shaft mechanism further comprises a sealing ring arranged between the bearing seat and the hollow shaft, and the locking mechanism further comprises a piston installed inside the hollow shaft. The piston is connected to the piston shaft, and the bearing seat is provided with a pipe joint. The hollow shaft is provided with a ventilation hole, and the piston divides the inside of the hollow shaft into a first chamber and a second chamber.

2. The paper tray replacement system according to claim 1, characterized by The first chamber, the ventilation hole, and the pipe joint are in communication. The locking mechanism further comprises a first elastic member installed in the second chamber. The first elastic member is a first spring in a compressed state, and the first spring drives the piston shaft to move towards the hollow shaft. The tapered surface of the piston shaft is gradually expanded from the hollow shaft to an end cover, so that the locking block extends outward to lock the paper disc when the piston shaft moves towards the hollow shaft. The locking mechanism further comprises a gland fixedly connected to the core shaft. The gland is provided with a sliding rod, and the locking block is provided with an oil-free bushing. The oil-free bushing is sleeved on the sliding rod, and the sliding rod is externally sleeved with a second elastic member. The second elastic member is in contact with the gland and the locking block at both ends. The rotating shaft mechanism further comprises the end cover fixedly connected to the core shaft. The end cover is provided with a third avoiding slot, and the third avoiding slot, the second avoiding slot, and the first avoiding slot are aligned and used for avoiding the robot hand claw for grabbing the paper disc.

3. The paper tray replacement system according to claim 1, characterized by The locking mechanism further comprises a rotating member rotatably mounted on the locking block, and the rotating member is in rolling contact with the conical surface of the piston shaft.

4. The paper tray replacement system according to claim 3, characterized by The second elastic member is a second spring in a compressed state, and the second spring is used to drive the locking block to move towards the piston shaft, so that the rotating member is in close contact with the conical surface of the piston shaft.

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