Opening and closing device of air door

Abstract

The utility model relates to an air door opening and closing device which comprises an air door cam, a cam driven bearing, a cam swing rod, a swing rod shaft, a swing rod assembly, an air door swing shaft, an exhaust pipe and an air suction pipe. The air door cam is installed on the paper feeding main transmission shaft, and the cam driven bearing is installed on the cam swing rod and matched with the air door cam. The oscillating bar shaft is fixedly connected with the cam oscillating bar; the two swing rod assemblies are fixedly connected to the two ends of the swing rod shaft respectively, and the other end of each swing rod assembly is fixedly connected with one air door swing shaft. The two ends of the air door swing shaft are connected with an air baffle in an air exhaust pipe and an air exhaust plate on one side of the air suction pipe respectively. Compared with the prior art, movement of the paper feeding main transmission shaft is transmitted to the air baffle in the air exhaust pipe and the air exhaust plate on one side of the air suction pipe through the air door cam, the swing rod assembly and the like, the air baffle and the air exhaust plate are controlled, and the control efficiency is high; and the opening and closing of the air door and the movement of the paper feeding main transmission shaft are synchronous all the time, so that the strict coordination and synchronism of paper feeding handover actions can be ensured.

Description

Technical Field

[0001] The utility model relates to a die-cutting machine, in particular to a switch device for an air door. Background Art

[0002] The damper switch of a die-cutting machine is primarily used to control the stability of paper feed in the paper feed system, ensuring that each sheet reaches the next workstation neatly and accurately. When the damper is closed, the paper feed system generates suction and holds the paper or cardboard for transport. When the damper is open, the suction disappears, and this is when the paper feed system and die-cutting system transfer paper or cardboard. If the paper feed system retains excessive residual suction at this stage, it will cause unstable transfer.

[0003] like Figure 1 As shown, in existing die-cutting machines, the damper opening and closing mechanisms are primarily controlled by pneumatic cylinders. Two pneumatic cylinders control the dampers, one on each side of the suction box. Paper feeding is accomplished by mechanical cams, and pneumatic cylinder-controlled dampers cannot guarantee constant synchronization between damper opening and closing and the mechanical cam's movement at any speed. This results in poor coordination with the overall machine operation, increasing the difficulty of paper feeding and debugging.

[0004] In summary, how to design a damper switch device that can achieve high synergy between the paper feeding process and the damper switch action is a technical problem that needs to be solved. Utility Model Content

[0005] The purpose of the present utility model is to provide a damper switch device in order to overcome the defect of poor coordination between the paper feeding process and the damper switch action in the prior art.

[0006] The purpose of the utility model can be achieved through the following technical solutions:

[0007] According to one aspect of the utility model, a damper switch device is provided, which is connected to the main transmission shaft of the paper feeder, and the switch device includes a damper cam, a cam follower bearing, a cam rocker, a rocker shaft, a rocker assembly, a damper swing shaft, an exhaust pipe and an air suction pipe, and there are two exhaust pipes, which are respectively located on both sides of the air suction pipe; the damper cam is installed on the main transmission shaft of the paper feeder, and the cam follower bearing is installed on the cam rocker and cooperates with the damper cam; the rocker shaft is fixedly connected to the cam rocker; the rocker assembly consists of two sets, which are respectively fixedly connected to the two ends of the rocker shaft, and the other end of the rocker assembly is fixedly connected to a damper swing shaft; the two ends of the damper swing shaft are respectively connected to a wind shield in the exhaust pipe and an exhaust plate on one side of the air suction pipe.

[0008] As a preferred technical solution, the rocker arm assembly includes a rocker arm seat, an exhaust rocker arm, a damper pull rod, a short rocker arm and a damper shaft seat; the two ends of the rocker arm shaft are respectively installed in the rocker arm seats of two sets of rocker arm assemblies; one end of the exhaust rocker arm is fixedly connected to the rocker arm shaft, and the other end is rotatably connected to the damper pull rod; the other end of the damper pull rod is rotatably connected to the short rocker arm; the short rocker arm is fixedly connected to the damper swing shaft.

[0009] As a preferred technical solution, both ends of the damper pull rod are respectively connected to the exhaust rocker arm and the short rocker arm through rod end joint bearings.

[0010] As a preferred technical solution, the exhaust duct is cylindrical, the shape of the wind shield is the same as the cross-sectional shape of the exhaust duct, and it rotates with the damper swing axis; when the wind shield is in the first position, the wind shield is perpendicular to the axis of the exhaust duct, blocking the flow of gas in the exhaust duct; when the wind shield is in the second position, there is a gap between the wind shield and the wall of the exhaust duct.

[0011] As a preferred technical solution, the side of the suction pipe is provided with first ventilation holes evenly distributed around the circumference, and the exhaust plate is provided with second ventilation holes evenly distributed around the circumference, and the exhaust plate rotates with the damper swing axis; when the exhaust plate is in the first position, the exhaust plate blocks the first ventilation holes; when the exhaust plate is in the second position, the first ventilation holes and the second ventilation holes are connected.

[0012] As a preferred technical solution, when the wind shield is in the first position, the exhaust plate is in the first position; when the wind shield is in the second position, the exhaust plate is in the second position.

[0013] As a preferred technical solution, the device further includes a positioning sleeve, which is mounted on and fixed to the damper swing shaft. There are two positioning sleeves, which are respectively located on both sides of the exhaust pipe.

[0014] As a preferred technical solution, the device further includes a clamping block, which is sleeved on the damper swing shaft and located on one side of the exhaust plate, fixing the exhaust plate along the axial direction of the damper swing shaft.

[0015] As a preferred technical solution, the device further includes a pressure ring, and the exhaust plate and the suction pipe are connected to each other by screws via the pressure ring.

[0016] As a preferred technical solution, the air door cam is sleeved on the main transmission shaft of the paper feeder, and a tension sleeve is installed between the air door cam and the main transmission shaft of the paper feeder.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1) The utility model transmits the movement of the paper feed main transmission shaft to the wind shield in the exhaust duct and the exhaust plate on one side of the suction duct through components such as the damper cam and the rocker arm assembly. Two wind shields and two exhaust plates can be controlled by one damper cam, which has high control efficiency. The opening and closing of the damper and the movement of the paper feed main transmission shaft are synchronized at all times, and no complex program control is required to ensure strict coordination and synchronization of the paper feed handover action.

[0019] 2) The structural design of the wind shield and exhaust plate of the utility model ensures that the state can be easily switched when the damper swing shaft rotates, and the space is small. The second ventilation hole on the exhaust plate can not only cooperate with the first ventilation hole of the suction pipe to realize the opening and closing of the suction pipe, but also the second ventilation hole reduces the mass of the exhaust plate, and the rotational inertia of the exhaust plate is small when the exhaust plate rotates.

[0020] 3) The utility model prevents the damper swing shaft from moving along the axis by using the positioning sleeve, and prevents the exhaust plate from moving along the axis by using the clamping block, thereby ensuring smooth switching action. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The diagram is a schematic diagram of a switch device for an existing cylinder control damper;

[0022] Figure 2 This is a schematic diagram of the overall structure of a damper switch device of the utility model;

[0023] Figure 3 This is a schematic diagram of the appearance of a damper switch device installed on a die-cutting machine according to the utility model;

[0024] Figure 4 This is a schematic diagram of the connection between the air door cam and the paper feeding main transmission shaft of the utility model;

[0025] Figure 5 This is a schematic diagram of the structure of the exhaust pipe and wind shield of the utility model;

[0026] Figure 6 This is a schematic diagram of the structure of the suction pipe and exhaust plate of the utility model;

[0027] The numbers in the figure show:

[0028] 1. Paper feed main drive shaft, 2. Air damper cam, 3. Tensioning sleeve, 4. Cam follower bearing, 5. Cam rocker, 6. Rocker seat, 7. Exhaust rocker, 8. Rocker shaft, 9. Rod end joint bearing, 10. Air damper pull rod, 11. Short rocker, 12. Air damper shaft seat, 13. Air damper swing shaft, 14. Positioning sleeve, 15. Exhaust duct, 16. Wind shield, 17. Clamping block, 18. Pressure ring, 19. Exhaust plate, 20. Suction duct. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0030] Existing air cylinder damper control systems suffer from poor synchronization, high impact, loud noise, and air leakage that can cause the cylinder to malfunction. Furthermore, the control procedures and debugging steps are complex. Neat and accurate paper delivery is a critical step in the die-cutting process. Therefore, a damper switch device with a simple structure, easy assembly, good synchronization, and stable control is urgently needed.

[0031] like Figure 2 and Figure 3 The utility model provides a damper switch device, including a damper cam 2, a tensioning sleeve 3, a cam follower bearing 4, a cam rocker 5, a rocker shaft 8, a rocker assembly, a damper swing shaft 13, an exhaust pipe 15, an air intake pipe 20, a positioning sleeve 14, a clamping block 17, and a pressure ring 18. The utility model is used in a die-cutting machine, which includes a paper feed main drive shaft 1.

[0032] like Figure 4 As shown, the damper cam 2 is mounted on the main paper feed drive shaft 1 and locked with a tension sleeve 3. The cam follower bearing 4 is mounted on the cam rocker 5 and locked with a nut. A track is provided within the damper cam 2, and the cam follower bearing 4 cooperates with the damper cam 2. When the damper cam 2 rotates, the cam follower bearing 4 moves along the track, driving the cam rocker 5. The rocker shaft 8 is fixedly connected to the cam rocker 5 and rotates with the movement of the cam rocker 5. A needle roller bearing can be used for the cam follower bearing 4.

[0033] The rocker assembly includes a rocker base 6, an exhaust rocker 7, a damper lever 10, a short rocker 11, and a damper shaft base 12. Two sets of rocker assemblies are mounted on either end of the rocker shaft 8. The ends of the rocker shaft 8 are mounted in the rocker base 6 of each rocker assembly. One end of the exhaust rocker 7 is fixedly connected to the rocker shaft 8, while the other end is pivotally connected to the damper lever 10. The other end of the damper lever 10 is pivotally connected to the short rocker 11, which is fixedly connected to the damper swing shaft 13. The ends of the damper lever 10 are connected to the exhaust rocker 7 and the short rocker 11, respectively, via rod-end spherical bearings 9. Rotation of the rocker shaft 8 drives the exhaust rocker 7, which in turn drives the damper lever 10. The damper lever 10 pulls the short rocker 11, which in turn drives the damper swing shaft 13.

[0034] like Figure 5As shown, the exhaust pipe 15 is cylindrical, and the wind shield 16 is circular, with dimensions exactly the same as the cross-section of the exhaust pipe 15, and rotates with the damper swing shaft 13; when the wind shield 16 is in a first position, the wind shield 16 is perpendicular to the axis of the exhaust pipe 15, and the flow of gas in the exhaust pipe 15 is blocked by the wind shield 16; when the wind shield 16 is in a second position, there is a gap between the wind shield 16 and the wall of the exhaust pipe 15, and the flow of gas in the exhaust pipe 15 is not blocked.

[0035] like Figure 6 As shown, the suction pipe 20 is provided with first ventilation holes evenly spaced around its circumference on both sides, and the exhaust plate 19 is provided with second ventilation holes evenly spaced around its circumference. The first and second ventilation holes can be identical in shape, size, and spacing. The exhaust plate 19 rotates with the damper swing shaft 13. When the exhaust plate 19 is in the first position, the baffle between the second ventilation holes on the exhaust plate 19 blocks the first ventilation holes, preventing air from flowing. When the exhaust plate 19 is in the second position, the first and second ventilation holes are connected, allowing air to flow through them. Two exhaust plates 19 are mounted on either side of the suction pipe 20 via a pressure ring 18. The exhaust plates 19 and the suction pipe 20 are connected by screws via the pressure ring 18. The exhaust plates 19 shown in the figure are of the grille type.

[0036] There are two exhaust ducts 15, which are located on both sides of the suction duct 20 respectively. There are two damper swing shafts 13. The two ends of one damper swing shaft 13 are respectively connected to the wind shield 16 and the exhaust plate 19 located in the exhaust duct 15 on one side. When the damper swing shaft 13 rotates, the wind shield 16 and the exhaust plate 19 move synchronously, that is, when the exhaust duct 15 is opened, the suction duct 20 is opened at the same time, and when the exhaust duct 15 is closed, the suction duct 20 is closed at the same time.

[0037] Two positioning sleeves 14 are mounted on the damper swing shaft 13 and supported by a jackscrew. The two positioning sleeves 14 are located on either side of the exhaust pipe 15. When the damper swing shaft 13 moves axially, the positioning sleeves 14 will be stuck on the exhaust pipe 15, preventing the damper swing shaft 13 from moving axially. The clamping block 17 is mounted on the damper swing shaft 13 and is located on one side of the exhaust plate 19. The exhaust plate 19 is clamped between the clamping block 17 and the side wall of the suction pipe 20, fixing the exhaust plate 19 along the axis of the swing shaft.

[0038] The working process of this utility model is as follows:

[0039] When the die-cutting machine starts, the main paper feed drive shaft 1 drives the damper cam 2 to rotate, and the cam rocker 5 swings back and forth along the cam curve. The action is first transmitted to the exhaust rocker 7 at both ends through the rocker shaft 8. Then, the two damper pull rods 10 pull the short rocker 11 to swing. After that, the damper swing shaft 13 starts to rotate to open and close the windshield 16 and exhaust plate 19 at both ends. Because they use the same power source, the four movements are consistent. When feeding paper, the windshield 16 and the exhaust pipe 15 are closed, and the exhaust plate 19 and the suction pipe 20 are closed. At this time, the damper is closed and a vacuum suction is formed in the suction box to ensure that each cardboard is flat and firmly against the lower suction bracket, so that the paper is fed out smoothly and accurately. When the windshield 16 and the exhaust pipe 15 are open, and the exhaust plate 19 and the suction pipe 20 are open, the suction of the paper feeding system disappears, and it is the paper feeding handover stage.

[0040] The present invention adopts a curve that fully matches the motion of the mechanical cam of the entire machine, eliminating the need for complex program control and ensuring strict coordination and synchronization of the paper feeding and handover movements. The motion curve is designed according to the position required for the movement to avoid large rigid impacts. The cam follower bearing 4 uses a needle bearing to reduce the impact load, ensures no abnormal noise during movement, and extends the service life of the parts. The use of a grille-type flat rotating exhaust plate 19 reduces the moment of inertia of the exhaust plate 19, lowers energy consumption, and saves space. One damper cam 2 controls four dampers, making debugging simple, manufacturing costs low, increasing the exhaust port, and improving the efficiency of air volume switching.

[0041] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and such modifications or substitutions are intended to be within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be subject to the scope of protection of the claims.

Claims

1. A damper switch device connected to a paper feed main transmission shaft (1), characterized in that: The switch device comprises a damper cam (2), a cam follower bearing (4), a cam rocker (5), a rocker shaft (8), a rocker assembly, a damper swing shaft (13), an exhaust pipe (15) and an air suction pipe (20), wherein the exhaust pipes (15) are two and are respectively located on both sides of the air suction pipe (20); the damper cam (2) is mounted on the paper feeding main transmission shaft (1), the cam follower bearing (4) is mounted on the cam rocker (5) and cooperates with the damper cam (2); the rocker shaft (8) is fixedly connected to the cam rocker (5); the rocker assembly is in two sets and is respectively fixedly connected to both ends of the rocker shaft (8), and the other end of the rocker assembly is fixedly connected to a damper swing shaft (13); the two ends of the damper swing shaft (13) are respectively connected to a wind shield (16) in the exhaust pipe (15) and an exhaust plate (19) on one side of the air suction pipe (20).

2. A damper switch device according to claim 1, characterized in that: The rocker assembly comprises a rocker seat (6), an exhaust rocker (7), a damper pull rod (10), a short rocker (11) and a damper shaft seat (12); both ends of the rocker shaft (8) are respectively installed in the rocker seats (6) of the two sets of rocker assemblies; one end of the exhaust rocker (7) is fixedly connected to the rocker shaft (8), and the other end is rotatably connected to the damper pull rod (10); the other end of the damper pull rod (10) is rotatably connected to the short rocker (11); the short rocker (11) is fixedly connected to the damper swing shaft (13).

3. A damper switch device according to claim 2, characterized in that: The two ends of the damper pull rod (10) are respectively connected to the exhaust swing rod (7) and the short swing rod (11) through rod end joint bearings (9).

4. The damper switch device according to claim 1, characterized in that: The exhaust pipe (15) is cylindrical, and the shape of the wind shield (16) is the same as the cross-sectional shape of the exhaust pipe (15), and rotates with the damper swing shaft (13); when the wind shield (16) is in a first position, the wind shield (16) is perpendicular to the axis of the exhaust pipe (15), blocking the flow of gas in the exhaust pipe (15); when the wind shield (16) is in a second position, there is a gap between the wind shield (16) and the pipe wall of the exhaust pipe (15).

5. The damper switch device according to claim 4, characterized in that: The side of the suction pipe (20) is provided with first ventilation holes evenly distributed around the circumference, and the exhaust plate (19) is provided with second ventilation holes evenly distributed around the circumference. The exhaust plate (19) rotates with the damper swing shaft (13); when the exhaust plate (19) is in a first position, the exhaust plate (19) blocks the first ventilation holes; when the exhaust plate (19) is in a second position, the first ventilation holes are connected to the second ventilation holes.

6. The damper switch device according to claim 5, characterized in that: When the wind shield (16) is in the first position, the exhaust plate (19) is in the first position; when the wind shield (16) is in the second position, the exhaust plate (19) is in the second position.

7. The damper switch device according to claim 1, characterized in that: The device further comprises a positioning sleeve (14), which is sleeved and fixed on the damper swing shaft (13). There are two positioning sleeves (14), which are respectively located on both sides of the exhaust pipe (15).

8. The damper switch device according to claim 1, characterized in that: The device also includes a clamping block (17), which is sleeved on the damper swing shaft (13) and located on one side of the exhaust plate (19), fixing the exhaust plate (19) along the axial direction of the damper swing shaft (13).

9. The damper switch device according to claim 1, characterized in that: The device also includes a pressure ring (18), and the exhaust plate (19) and the suction pipe (20) are connected to each other by screws via the pressure ring (18).

10. The damper switch device according to claim 1, characterized in that: The air door cam (2) is sleeved on the paper feeding main transmission shaft (1), and a tension sleeve (3) is installed between the air door cam (2) and the paper feeding main transmission shaft (1).

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