Front air suction roller of drying chamber of powder shaking machine

Abstract

The utility model relates to a front air suction roller of a drying chamber of a powder shaking machine. The front air suction roller of the drying chamber of the powder shaking machine comprises a negative pressure bin and an air suction pipe, two ends of the negative pressure bin are connected with the side wall of the powder shaking machine; the air suction pipe comprises a transverse pipe body and a driving mechanism; two ends of the pipe body are closed; the driving mechanism is arranged at one end of the pipe body and is in driving connection with the pipe body; the end part of the pipe body is rotationally connected with the side wall of the powder shaking machine; the pipe body is embedded into the top opening of the negative-pressure bin; the side wall of the pipe body abuts against the side wall of the negative pressure bin. A negative pressure connector connected with a negative pressure air source is arranged at the position, lower than the pipe body, of the negative pressure bin; air suction holes are densely distributed in the circumferential side face of the pipe body. The negative pressure bin which is only communicated with the air suction hole and the negative pressure connector is arranged below the pipe body, so that the structure is simpler, and the manufacturing and mounting cost is very low; moreover, in the negative pressure bin, the negative pressure suction force backwards provided by the cavity below the pipe body and the inner space of the pipe body is equally divided, so that the negative pressure suction force generated by the air suction holes exposed on the outer side of the negative pressure bin is equal.

Description

Technical Field

[0001] The utility model relates to the technical field of accessories of a powder shaking machine, in particular to a pre - suction roller for a drying chamber of a powder shaking machine. Background Art

[0002] The suction roller is a common conveying component in the printing field. Generally, suction holes are densely distributed on the side of the suction roller, and a suction channel communicating with the suction holes is arranged inside the suction roller; the suction channel is also communicated with a negative pressure unit, so that the suction holes of the suction roller all have negative pressure suction to attract the printing medium. The utility model patent for a suction roller cylinder with the authorization publication number CN213861459U and the utility model patent for a suction roller, a transmission device and a printing device with the authorization publication number CN214606636U are all similar settings. In order to ensure the stable connection between the negative pressure unit and the suction channel, the existing suction rollers are all provided with complex connection structures, such as the suction component 122 in the utility model patent with the authorization publication number CN214606636U, which increases the manufacturing cost of the suction roller; on the other hand, the suction roller arranged in front of the drying chamber of the powder shaking machine also needs to ensure that the printing medium entering the drying chamber is in a flat state; the utility model patent with the authorization publication number CN214606636U is difficult to meet this requirement. Summary of the Utility Model

[0003] The purpose of the utility model is to solve the above problems and provide a pre - suction roller for a drying chamber of a powder shaking machine.

[0004] The technical solution of the present utility model is: a pre - suction roller for the drying chamber of a powder shaking machine, which is arranged in the middle of the powder shaking machine, in front of the drying chamber; the suction roller includes a negative pressure chamber and a suction air pipe; the negative pressure chamber generates a stable negative pressure suction force; the suction air pipe attracts the printing medium by means of the negative pressure suction force of the negative pressure chamber; the top of the negative pressure chamber is open, and both ends are connected to the side wall of the powder shaking machine to fix the position of the negative pressure chamber; the suction air pipe includes a horizontal pipe body and a driving mechanism; both ends of the pipe body are closed; the driving mechanism is arranged at one end of the pipe body and is drivingly connected to the pipe body; the driving mechanism drives the pipe body to rotate; the end of the pipe body is rotatably connected to the side wall of the powder shaking machine to increase the rotation stability of the pipe body and reduce the resistance suffered by the pipe body during rotation; the pipe body is embedded in the top opening of the negative pressure chamber to realize the connection between the pipe body and the negative pressure chamber; the side wall of the pipe body abuts against the side wall of the negative pressure chamber, so that a closed cavity is formed at the bottom of the negative pressure chamber; a negative pressure interface connected to a negative pressure air source is arranged at a position where the negative pressure chamber is lower than the pipe body; the negative pressure interface provides sufficient negative pressure power for the negative pressure chamber; the circumferential side surface of the pipe body is densely provided with air suction holes; the air suction holes communicate the closed cavity with the outside; the air suction holes include air suction hole A and air suction hole B; air suction hole A remains inside the negative pressure chamber; air suction hole B is exposed outside the negative pressure chamber; air suction hole A and air suction hole B continuously switch as the pipe body rotates; the negative pressure interface is connected to the negative pressure source so that the closed cavity of the negative pressure chamber obtains a negative pressure suction force; this negative pressure suction force is evenly distributed along the axial direction of the pipe body through the closed cavity; this negative pressure suction force enters the inside of the pipe body through air suction hole A and then acts evenly on air suction hole B through the inside of the pipe body; the negative pressure suction force at air suction hole B is evenly divided twice through the closed cavity and the inside of the pipe body, so that the negative pressure suction force on the air suction holes is equal.

[0005] Preferably, the negative pressure interface is arranged at the central position of the bottom of the negative pressure chamber, so that the negative pressure suction force obtained by the negative pressure interface can act evenly on air suction hole A more quickly.

[0006] Preferably, the suction air pipe further includes an end plate, a bearing, and an installation vertical plate; the end plate is installed at the end of the pipe body, and a rotating shaft coaxial with the pipe body extends outward from the center; the end plate seals the pipe body, so that a closed space is formed inside the pipe body, and only the air suction holes are left to communicate with the outside; the rotating shaft establishes a rotational connection with the outside instead of the pipe body; the rotating shaft is installed on the installation vertical plate through the bearing; the pipe body reduces the rotation resistance of the pipe body through the bearing; the installation vertical plate is fixedly connected to the side wall of the powder shaking machine to realize the connection between the suction air pipe and the side wall of the powder shaking machine.

[0007] Furthermore, the end cover is provided with an annular groove matching the bearing; a part of the bearing is embedded in the annular groove; on the one hand, this annular groove makes the axial structure of the suction air pipe more compact, and on the other hand, it increases the constraint on the bearing and improves the connection stability between the bearing and the end cover.

[0008] Preferably, the air suction holes are arranged in an array; the air suction holes in adjacent rows are arranged in a staggered manner, so that negative pressure suction forces are generated at corresponding air suction holes in each section inside the pipe body, avoiding unstable air pressure inside the pipe body due to the concentration of air suction holes and improving the air suction stability of the air suction holes.

[0009] Further, the driving mechanism includes a driving motor, Gear A, Gear B, Gear C, and Gear D; the output shaft of the driving motor is coaxially and fixedly connected to Gear A; Gear B meshes with Gear A and is coaxially and fixedly connected to Gear C; Gear D meshes with Gear C and is coaxially and fixedly connected to the air suction pipe; the driving motor transmits torque to the air suction pipe through Gear A, Gear B, Gear C, and Gear D to drive the air suction pipe to rotate.

[0010] Further, the rotating shaft coaxially extends out of the mounting shaft; Gear D is coaxially connected to the air suction pipe through the mounting shaft; the outer diameter of the mounting shaft < the outer diameter of the rotating shaft; a step is formed between the mounting shaft and the rotating shaft to separate Gear D and the bearing into two spaces, so that Gear D and the bearing do not interfere with each other during operation.

[0011] Further, the driving mechanism further includes L-shaped Plate A, L-shaped Plate B, connecting column, and transmission shaft; the driving motor is installed on the outside of L-shaped Plate A; Gear B and Gear C are coaxially and fixedly connected to the transmission shaft; both ends of the transmission shaft are rotatably connected to L-shaped Plate A and L-shaped Plate B respectively; L-shaped Plate A and L-shaped Plate B are connected by the connecting column; L-shaped Plate A is fixedly connected to the side wall of the powder shaking machine; the connecting column keeps the driving motor at a certain distance from the side wall of the powder shaking machine to accommodate the installation of Gear A, Gear B, and Gear C; L-shaped Plate B also protects Gear A, Gear B, and Gear C; the transmission shaft also ensures that Gear B and Gear C can rotate coaxially.

[0012] Further, the outer diameter of Gear A < the outer diameter of Gear B; the outer diameter of Gear C < the outer diameter of Gear D; Gear A and Gear B cooperate to reduce the rotational speed output by the driving motor; Gear C and Gear D cooperate to reduce the rotational speed output by Gear B, so that the rotational speed output by Gear D meets the rotational speed requirement of the air suction pipe.

[0013] Further, L-shaped Plate B is arranged on one side of the mounting vertical plate; L-shaped Plate B and the mounting vertical plate form a complete rectangle, with only the four corners of the rectangle protruding, which is convenient for installation and reduces bumps.

[0014] Preferably, the air suction roller further includes a guiding plate; the guiding plate is horizontally arranged above the rear side of the air suction pipe; the front edge of the guiding plate lies on the upper side of the air suction pipe; the guiding plate transfers the printing medium adsorbed by the air suction roller to the conveying structure of the drying chamber; the upper edge of the front side wall of the negative pressure chamber is connected to the front side of the air suction pipe; the upper edge of the rear side wall of the negative pressure chamber is provided with a rearward flanging; the flanging is connected to the bottom of the guiding plate by screws, so that a sealing effect is formed between the upper edge of the rear side wall of the negative pressure chamber and the cover plate; the air suction port B is concentrated in the upper right part of the pipe body, which is also the part where the pipe body contacts the printing medium, so that the negative pressure suction is applied to adsorb the printing medium as much as possible, reducing the waste of negative pressure suction.

[0015] The beneficial effects of the present utility model are as follows: The powder shaking machine drying chamber of the present utility model is provided with a front air suction roller, which has the following advantages:

[0016] (1) The utility model is provided with a negative pressure chamber below the pipe body, which is only communicated with the air suction holes and the negative pressure interface. The structure is simpler, and the manufacturing and installation costs are very low. Moreover, inside the negative pressure chamber, the cavity below the pipe body and the internal space of the pipe body evenly divide the negative pressure suction provided to the negative pressure interface backward, so that the negative pressure suction generated by the air suction holes exposed outside the negative pressure chamber is equal.

[0017] (2) The guiding plate of the utility model smoothly transfers the printing medium adsorbed by the air suction roller to the conveying structure in the drying chamber. The guiding plate cooperates with the rear side wall of the negative pressure chamber, so that a sealing effect is formed between the upper edge of the rear side wall of the negative pressure chamber and the cover plate. The air suction port B is concentrated in the upper right part of the pipe body, which is also the part where the pipe body contacts the printing medium, so that the negative pressure suction is applied to adsorb the printing medium as much as possible, reducing the waste of negative pressure suction. Description of the Drawings

[0018] Figure 1 is the installation schematic diagram of the front-mounted air suction roller in the drying chamber of the powder shaking machine of the utility model;

[0019] Figure 2 is the three-dimensional view of the front-mounted air suction roller in the drying chamber of the powder shaking machine of the utility model;

[0020] Figure 3 is Figure 1 the front view of;

[0021] Figure 4 is Figure 3 the A-A cross-sectional view of;

[0022] Figure 5 is Figure 4 the B-B cross-sectional view of;

[0023] Figure 6 is the three-dimensional view of the driving mechanism;

[0024] In the figure: 0. Side wall of the powder shaking machine, 1. Negative pressure chamber, 11. Negative pressure interface, 12. Hem, 2. Air suction pipe, 21. Pipe body, 211. Air suction holes, 22. Driving mechanism, 221. Driving motor, 222. Gear A, 223. Gear B, 224. Gear C, 225. Gear D, 23. End plate, 231. Rotating shaft, 2311. Mounting shaft, 232. Annular groove, 24. Bearing, 25. Mounting vertical plate, 26. L plate A, 27. L plate B, 28. Connecting column, 29. Transmission shaft, 3. Guiding plate, 31. Inclined side. Specific Embodiments

[0025] Example 1: Refer to Figures 1-6, a pre-drying chamber air suction roller for a powder shaking machine, is arranged in the middle of the powder shaking machine, in front of the drying chamber; the air suction roller includes a negative pressure chamber 1 and an air suction pipe 2; the negative pressure chamber 1 generates a stable negative pressure suction force; the air suction pipe 2 attracts the printing medium by means of the negative pressure suction force of the negative pressure chamber 1; the top of the negative pressure chamber 1 is open, and both ends are connected to the side wall 0 of the powder shaking machine to fix the position of the negative pressure chamber 1; the air suction pipe 2 includes a transverse pipe body 21 and a driving mechanism 22; both ends of the pipe body 21 are closed; the driving mechanism 22 is arranged at one end of the pipe body 21 and is drivingly connected to the pipe body 21; the driving mechanism 22 drives the pipe body 21 to rotate; the end of the pipe body 21 is rotatably connected to the side wall 0 of the powder shaking machine to increase the rotation stability of the pipe body 21 and reduce the resistance suffered by the rotation of the pipe body 21; the pipe body 21 is embedded in the top opening of the negative pressure chamber 1 to realize the connection between the pipe body 21 and the negative pressure chamber 1; the side wall of the pipe body 21 abuts against the side wall of the negative pressure chamber 1, so that a sealed cavity is formed at the bottom of the negative pressure chamber 1; a negative pressure interface 11 connected to a negative pressure gas source is arranged at a position lower than the pipe body 21 in the negative pressure chamber 1; the negative pressure interface 11 provides sufficient negative pressure power for the negative pressure chamber 1; a plurality of air suction holes 211 are densely arranged on the circumferential side surface of the pipe body 21; the air suction holes 211 communicate the sealed cavity with the outside; the air suction holes 211 include air suction holes 211A and air suction holes 211B; the air suction holes 211A remain inside the negative pressure chamber 1; the air suction holes 211B are exposed outside the negative pressure chamber 1; the air suction holes 211A and the air suction holes 211B are continuously switched as the pipe body 21 rotates; the negative pressure interface 11 is connected to the negative pressure source so that the sealed cavity of the negative pressure chamber 1 obtains a negative pressure suction force; the negative pressure suction force is evenly distributed along the axial direction of the pipe body 21 through the sealed cavity; the negative pressure suction force enters the inside of the pipe body 21 through the air suction holes 211A and then acts uniformly on the air suction holes 211B through the inside of the pipe body 21; the negative pressure suction force at the air suction holes 211B is made equal due to the double equalization through the sealed cavity and the inside of the pipe body 21, so that the negative pressure suction force on the air suction holes 211 is equal.

[0026] Compared with the prior art, the utility model is provided with a negative pressure chamber 1 only communicating with the air suction holes 211 and the negative pressure interface 11 below the pipe body 21, the structure is simpler, and both the manufacturing and installation costs are very low; moreover, inside the negative pressure chamber 1, the cavity below the pipe body 21 and the internal space of the pipe body 21 evenly divide the negative pressure suction force provided by the negative pressure interface 11 backward, so that the negative pressure suction force generated by the air suction holes 211 exposed outside the negative pressure chamber 1 is equal.

[0027] The negative pressure interface 11 is arranged at the central position of the bottom of the negative pressure chamber 1, so that the negative pressure suction force obtained by the negative pressure interface 11 can act uniformly on the air suction holes 211A more quickly.

[0028] The air suction pipe 2 further includes an end plate 23, a bearing 24, and a mounting vertical plate 25; the end plate 23 is installed at the end of the pipe body 21, and a rotating shaft 231 coaxial with the pipe body 21 extends outward from the center; the end plate 23 seals the pipe body 21 to form a closed space inside the pipe body 21, leaving only the air suction holes 211 communicating with the outside; the rotating shaft 231 establishes a rotational connection with the outside instead of the pipe body 21; the rotating shaft 231 is installed on the mounting vertical plate 25 through the bearing 24; the pipe body 21 reduces the rotational resistance of the pipe body 21 through the bearing 24; the mounting vertical plate 25 is fixedly connected to the side wall 0 of the powder shaking machine to realize the connection between the air suction pipe 2 and the side wall 0 of the powder shaking machine.

[0029] The end cover is provided with an annular groove 232 matching the bearing 24; a part of the bearing 24 is embedded in the annular groove 232; on the one hand, the annular groove 232 makes the axial structure of the air suction pipe 2 more compact, and on the other hand, it increases the constraint on the bearing 24 and improves the connection stability between the bearing 24 and the end cover.

[0030] The air suction holes 211 are arranged in an array; the air suction holes 211 in adjacent rows are arranged in a staggered manner, so that negative pressure suction is generated at the corresponding air suction holes 211 in each section inside the pipe body 21, avoiding unstable air pressure inside the pipe body 21 caused by the concentration of the air suction holes 211 and improving the air suction stability of the air suction holes 211.

[0031] The driving mechanism 22 includes a driving motor 221, a gear A 222, a gear B 223, a gear C 224, and a gear D 225; the output shaft of the driving motor 221 is coaxially and fixedly connected to the gear A 222; the gear B 223 meshes with the gear A 222 and is coaxially and fixedly connected to the gear C 224; the gear D 225 meshes with the gear C 224 and is coaxially and fixedly connected to the air suction pipe 2; the driving motor 221 transmits torque to the air suction pipe 2 through the gear A 222, the gear B 223, the gear C 224, and the gear D 225 to drive the air suction pipe 2 to rotate.

[0032] The rotating shaft 231 coaxially extends outward to form a mounting shaft 2311; the gear D 225 is coaxially connected to the air suction pipe 2 through the mounting shaft 2311; the outer diameter of the mounting shaft 2311 < the outer diameter of the rotating shaft 231; a step is formed between the mounting shaft 2311 and the rotating shaft 231 to separate the gear D 225 and the bearing 24 into two spaces, so that the gear D 225 and the bearing 24 do not interfere with each other during operation.

[0033] The driving mechanism 22 further includes L-shaped plate A 26, L-shaped plate B 27, connecting column 28, and transmission shaft 29; the driving motor 221 is installed outside L-shaped plate A 26; gear B 223 and gear C 224 are coaxially and fixedly connected to the transmission shaft 29; both ends of the transmission shaft 29 are rotatably connected to L-shaped plate A 26 and L-shaped plate B 27 respectively; L-shaped plate A 26 and L-shaped plate B 27 are connected by the connecting column 28; L-shaped plate A 26 is fixedly connected to the side wall 0 of the powder shaking machine; the connecting column 28 keeps the driving motor 221 at a sufficient distance from the side wall 0 of the powder shaking machine to accommodate the installation of gear A 222, gear B 223, and gear C 224; L-shaped plate B 27 also protects gear A 222, gear B 223, and gear C 224; the transmission shaft 29 also ensures that gear B 223 and gear C 224 can rotate coaxially.

[0034] The outer diameter of gear A 222 < the outer diameter of gear B 223; the outer diameter of gear C 224 < the outer diameter of gear D 225; gear A 222 and gear B 223 cooperate with each other to be able to reduce the rotational speed output by the driving motor 221; gear C 224 and gear D 225 cooperate with each other to be able to reduce the rotational speed output by gear B 223, so that the rotational speed output by gear D 225 meets the rotational speed requirement of the air suction pipe 2.

[0035] L-shaped plate B 27 is arranged on one side of the installation vertical plate 25; L-shaped plate B 27 and the installation vertical plate 25 form a complete rectangle, with only the four corners of the rectangle protruding, which is convenient for installation and reduces collisions at the same time.

[0036] The working principle of this embodiment: The air suction holes 211 communicate the sealed cavity with the outside; the air suction holes 211 include air suction holes 211A and air suction holes 211B; the air suction holes 211A remain inside the negative pressure chamber 1; the air suction holes 211B are exposed outside the negative pressure chamber 1; the air suction holes 211A and air suction holes 211B are continuously switched as the pipe body 21 rotates; the negative pressure interface 11 is connected to a negative pressure source to make the sealed cavity of the negative pressure chamber 1 obtain a negative pressure suction force; this negative pressure suction force is evenly distributed along the axial direction of the pipe body 21 through the sealed cavity; this negative pressure suction force enters the inside of the pipe body 21 through the air suction holes 211A and then acts evenly on the air suction holes 211B through the inside of the pipe body 21; the negative pressure suction force at the air suction holes 211B is evenly divided twice through the sealed cavity and the inside of the pipe body 21, making the negative pressure suction force on the air suction holes 211 equal. The adjacent rows of air suction holes 211 are arranged in a staggered manner, so that corresponding air suction holes 211 generate negative pressure suction forces in each section inside the pipe body 21, avoiding unstable air pressure inside the pipe body 21 caused by the concentration of the air suction holes 211 and improving the air suction stability of the air suction holes 211.

[0037] Embodiment 2: Embodiment 2 is basically the same as Embodiment 1, and the same parts will not be described again. The differences are as follows: The suction roller further includes a guiding plate 3; the guiding plate 3 is horizontally arranged above the rear side of the suction pipe 2; the front edge of the guiding plate 3 is placed on the upper side surface of the suction pipe 2; the guiding plate 3 smoothly transfers the printing medium adsorbed by the suction roller to the conveying structure in the drying chamber; the upper edge of the front side wall of the negative pressure chamber 1 is connected to the front side surface of the suction pipe 2; the upper edge of the rear side wall of the negative pressure chamber 1 is provided with a rearward flanging 12; the flanging 12 is connected to the bottom of the guiding plate 3 by screws, so as to form a sealing effect between the upper edge of the rear side wall of the negative pressure chamber 1 and the cover plate; the suction port B is concentrated in the upper right part of the pipe body 21, which is also the part where the pipe body 21 is in contact with the printing medium, so that the negative pressure suction force is applied to adsorb the printing medium as much as possible, reducing the waste of the negative pressure suction force.

[0038] Both the front and rear edges of the guiding plate 3 are provided with downwardly inclined bevels 31, so as to guide the printing medium on the suction roller onto the guiding plate 3 and guide the printing medium on the guiding plate 3 to the conveying structure in the drying chamber.

Claims

1. A front suction roller in the drying chamber of a powder shaking machine is arranged in the middle of the powder shaking machine, characterized in that: It includes a negative pressure bin and a suction duct; the top of the negative pressure bin is open, and both ends are connected to the side walls of the powder shaking machine; the suction duct includes a horizontal tube body and a driving mechanism; both ends of the tube body are closed; the driving mechanism is arranged at one end of the tube body, and is drivingly connected to the tube body; the end of the tube body is rotatably connected to the side wall of the powder shaking machine; the tube body is embedded in the top opening of the negative pressure bin; the side wall of the tube body is abutted against the side wall of the negative pressure bin; a negative pressure interface connected to a negative pressure gas source is arranged at a position of the negative pressure bin below the tube body; and the circumferential side of the tube body is densely covered with suction holes.

2. The front suction roller of the powder shaking machine drying chamber according to claim 1 is characterized in that: The negative pressure interface is arranged at the center of the bottom of the negative pressure chamber.

3. The front suction roller of the powder shaking machine drying chamber according to claim 1 is characterized in that: The suction pipe also includes an end plate, a bearing, and a mounting plate; the end plate is installed at the end of the pipe body, and a rotating shaft coaxial with the pipe body extends outward from the center; the rotating shaft is installed on the mounting plate through a bearing; the mounting plate is fixedly connected to the side wall of the powder shaking machine.

4. The front suction roller of the powder shaking machine drying chamber according to claim 3 is characterized by: The end cover is provided with an annular groove matching the bearing; a part of the bearing is embedded in the annular groove.

5. The front suction roller of the powder shaking machine drying chamber according to claim 1 is characterized in that: The air suction holes are arranged in an array; the air suction holes in adjacent rows are arranged in a staggered manner.

6. The front suction roller of the powder shaking machine drying chamber according to claim 1 or 3, characterized in that: The driving mechanism includes a driving motor, gear A, gear B, gear C, and gear D; the output shaft of the driving motor is coaxially fixedly connected to gear A; gear B is meshed with gear A and coaxially fixedly connected to gear C; gear D is meshed with gear C and coaxially fixedly connected to the suction pipe.

7. The front suction roller of the powder shaking machine drying chamber according to claim 6 is characterized by: The rotating shaft coaxially extends outward from the mounting shaft; the gear D is coaxially connected with the air suction pipe through the mounting shaft; the outer diameter of the mounting shaft is less than the outer diameter of the rotating shaft.

8. The front suction roller of the powder shaking machine drying chamber according to claim 6 is characterized by: The driving mechanism also includes L plate A, L plate B, a connecting column, and a transmission shaft; the driving motor is installed on the outside of the L plate A; gear B and gear C are coaxially fixed on the transmission shaft; both ends of the transmission shaft are respectively rotatably connected to the L plate A and L plate B; the L plate A is fixed to the side wall of the powder shaking machine; the L plate A and L plate B are connected through a connecting column.

9. The front suction roller of the powder shaking machine drying chamber according to claim 6 is characterized by: The outer diameter of gear A is less than the outer diameter of gear B; the outer diameter of gear C is less than the outer diameter of gear D.

10. The front suction roller of the powder shaking machine drying chamber according to claim 8 is characterized in that: L-plate B is arranged on one side of the installation vertical plate; L-plate B and the installation vertical plate form a complete rectangle.

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