Negative pressure transfer mechanism and printing equipment

Abstract

The utility model discloses a negative pressure transfer mechanism and a printing device, the negative pressure transfer mechanism comprises two swing arms, a driver used for driving the two swing arms to swing back and forth, and a negative pressure suction device installed on the swing arms, the driver drives the swing arms to swing and drives the negative pressure suction device to move back and forth between a first position and a second position; and the two swing arms rotate through a fulcrum I at a fixed position. The scheme is particularly suitable for application scenes of transferring hard materials, and is simple in structure and low in cost.

Description

Technical Field

[0001] The utility model relates to printing equipment, in particular to a negative pressure transfer mechanism and printing equipment. Background Art

[0002] In order to improve printing efficiency, a transfer mechanism is an indispensable mechanism in a printing device, which can transfer the printing medium to a conveying component by means of transfer, and then send the printing medium to the position of the printing component through the conveying component for printing.

[0003] It is relatively convenient to transport some printing media made of soft materials, but when transporting hard plate structures, problems such as large volume and weight will arise, making transportation more difficult.

[0004] Among the currently feasible structures, there is a plan to use a robotic arm structure for transfer, but this equipment has a complex structure and high cost, and requires accurate positioning every time the printing medium is transferred. Otherwise, transfer position deviations are likely to occur, resulting in problems with the placement of the printing medium after transfer.

[0005] Therefore, a transfer mechanism with simple structure, low cost and high working efficiency is also needed. Utility Model Content

[0006] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a negative pressure transfer mechanism and printing equipment, which are particularly suitable for application scenarios of transferring hard materials, and have a simple structure and low cost.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: A negative pressure transfer mechanism, comprising two swing arms, a driver for driving the two swing arms to swing back and forth, and a negative pressure suction device installed on the swing arms, wherein the driver drives the swing arms to swing and drives the negative pressure suction device to move back and forth between a first position and a second position; the two swing arms rotate through a fulcrum at a fixed position.

[0008] As a further improvement of the present invention, the negative pressure suction device includes a connecting shaft for connecting the swing arm, a frame mounted on the connecting shaft, and a plurality of negative pressure suction cups mounted on the frame; the frame is rotatably mounted on the connecting shaft.

[0009] As a further improvement of the present invention, it further comprises a balancing rod, which is rotatably connected to the frame and is also rotatably connected to a second fulcrum at a fixed position; when the swing arm swings, the balancing rod swings synchronously and keeps the frame in a horizontal state.

[0010] As a further improvement of the present invention, when the swing arm swings, the position angular velocity of the connection between the swing arm and the connecting shaft is the same as the position angular velocity of the connection between the balance bar and the frame.

[0011] As a further improvement of the present invention, both fulcrum one and fulcrum two are located on a connecting member, and the connecting member has a connecting portion for connecting the swing arm and the balance bar, and the swing arm and the balance bar are rotatably connected to the connecting portion; the connecting member is used to be fixedly connected to the external bracket.

[0012] As a further improvement of the present invention, the driver includes an actuator, a rotating shaft, and two gears arranged on the rotating shaft. The actuator is linked to the rotating shaft, and the rotating shaft is driven to rotate by the actuator. The positions of the corresponding gears on the two swing arms are provided with external teeth arranged along a circular arc trajectory. The gears are engaged with the external teeth and the swing arms are driven to swing by the rotation of the rotating shaft.

[0013] As a further improvement of the present invention, both fulcrum one and fulcrum two are located on a connecting member, and the connecting member has a connecting portion for connecting the swing arm and the balance bar, and the swing arm and the balance bar are rotatably connected to the connecting portion; the connecting member is used to be fixedly connected to the external bracket.

[0014] As a further improvement of the present invention, the connecting member is further provided with a connecting hole for passing the rotating shaft. The rotating shaft is installed in the connecting hole through a bearing, and the deviation of the rotating shaft is limited by the connecting hole.

[0015] A printing device includes a printing component, a printing platform, and a conveying component. The conveying component is used to convey the printing medium to the printing platform and print the printing medium through the printing component. It also includes a negative pressure transfer mechanism such as any of the above-mentioned improved schemes, and the printing medium is transferred to the conveying component through the negative pressure transfer mechanism.

[0016] The beneficial effect of this utility model is that the single-degree-of-freedom swing of the swing arm simplifies the mechanical design of the transfer path and reduces the reliance on drive precision. It is particularly suitable for the transfer of rigid plate-like materials. The negative pressure suction device is also more suitable for rigid printing media. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of the utility model in the installation state;

[0018] Figure 2 This is a side view of the structure of the utility model in the installed state;

[0019] Figure 3 This is a schematic diagram of the three-dimensional structure of the hidden external bracket and some components of the utility model;

[0020] Figure 4 for Figure 3 Enlarged view of part A in .

[0021] Figure numbers: 1. Swing arm; 11. External teeth; 2. Driver; 21. Actuator; 22. Rotating shaft; 23. Gear; 3. Negative pressure suction device; 31. Connecting shaft; 32. Frame; 33. Negative pressure suction cup; 4. Fulcrum 1; 5. Balance bar; 6. Fulcrum 2; 7. Connector; 71. Connecting hole. DETAILED DESCRIPTION

[0022] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings.

[0023] Reference Figure 1-4 As shown,

[0024] A negative pressure transfer mechanism includes two swing arms 1, a driver 2 for driving the two swing arms 1 to swing back and forth, and a negative pressure suction device 3 installed on the swing arms 1. The driver 2 drives the swing arms 1 to swing and moves the negative pressure suction device 3 back and forth between a first position and a second position; the two swing arms 1 rotate through a fulcrum 4 at a fixed position.

[0025] In this solution, driver 2 drives swing arm 1 to swing about fulcrum 4, driving negative pressure suction device 3 to reciprocate between two fixed positions (a first position and a second position). When swing arm 1 swings to the first position, negative pressure suction device 3 absorbs the print medium; when swing arm 1 swings to the second position, negative pressure suction device 3 releases the print medium to the conveyor assembly. The single-degree-of-freedom swing of swing arm 1 simplifies the mechanical design of the transport path and reduces reliance on drive accuracy. This makes it particularly suitable for transporting rigid, sheet-like materials.

[0026] The swing arm 1 can be rotatably connected to the fulcrum 1 4, allowing the swing arm 1 to rotate with the fulcrum as a hinge point, so that the trajectory of each swing is stable and controllable. The driver 2 can be driven by a motor or a power push rod, and the power push rod can be a pneumatic push rod, a gas pressure push rod, an electric push rod, etc. The negative pressure suction device 3 can be composed of a negative pressure suction cup 33 and an air pump. The air pump can be used to drive the negative pressure suction cup 33 to generate negative pressure, thereby adsorbing the hard plate-shaped printing medium.

[0027] As an implementation scheme that can make the printing medium transfer process more stable, the negative pressure suction device 3 includes a connecting shaft 31 for connecting the swing arm 1, a frame 32 installed on the connecting shaft 31, and a number of negative pressure suction cups 33 installed on the frame 32; the frame 32 is rotatably installed on the connecting shaft 31.

[0028] Frame 32 is hinged to swing arm 1 via connecting shaft 31, allowing frame 32 to rotate about connecting shaft 31. As swing arm 1 swings, the frame 32's rotational freedom can be used to adjust the print medium's position. For example, in the first position, the print medium is flat. Rotation of frame 32 allows the print medium to be conveyed in a flat position, where it is released onto the conveyor assembly. The distributed layout of multiple negative pressure suction cups 33 further enhances uniform suction force, preventing localized stress concentration and material deformation.

[0029] As a solution to make the state control during the transfer of auxiliary printing media more stable, this solution can also add a balance bar 5, which is rotatably connected to the frame 32 and is also rotatably connected to a fulcrum 2 6 at a fixed position; when the swing arm 1 swings, the balance bar 5 swings synchronously and keeps the frame 32 in a horizontal state.

[0030] One end of the balance bar 5 is hinged to the frame 32, and the other end swings about pivot point 2 6. When the swing arm 1 drives the frame 32 to move, the balance bar 5 suppresses the tilt of the frame 32 by synchronously swinging, so that the frame 32 always remains in a horizontal state (for example, to smoothly release hard board materials during transportation). The distance between pivot point 2 6 and pivot point 1 4 is equal to the distance between the connection point between the balance bar 5 and the frame 32 and the connection point between the connecting shaft 31 and the swing arm 1. This can further ensure the synchronization and stability of the balance bar 5 and the swing arm 1, and can better control the state of the frame 32. Of course, a certain deviation in this distance will cause the frame 32 to tilt to a certain extent, which will also cause the state of the printing medium to change. However, if it can meet the use requirements, a certain deviation in this distance can also be allowed.

[0031] Preferably, when the swing arm 1 swings, the position angular velocity of the connection between the swing arm 1 and the connecting shaft 31 is the same as the position angular velocity of the connection between the balance bar 5 and the frame 32 .

[0032] By matching the angular velocities of the swing arm 1 and the balance bar 5, the motion trajectory of the frame 32 is ensured to be purely translational (i.e., without rotational components). This design avoids the problem of suction cup tilt caused by angular velocity differences in traditional swing mechanisms, improving the positioning accuracy of rigid sheet materials. Furthermore, it offers a simple structure and stable transport. The translational motion of the frame 32 can be achieved solely through mechanical design.

[0033] In order to facilitate installation and precision control, fulcrum 1 4 and fulcrum 2 6 are both located on a connecting member 7, and the connecting member 7 has a connecting portion for connecting the swing arm 1 and the balance bar 5, and the swing arm 1 and the balance bar 5 are rotatably connected to the connecting portion; the connecting member 7 is used to be fixedly connected to the external bracket.

[0034] Connector 7 serves as a common mounting base for pivot point 1 4 and pivot point 2 6 and is secured to the printer frame via an external bracket. The direct mounting of swing arm 1 and balance bar 5 on connector 7 ensures proper pivot spacing and prevents frame 32 deflection due to assembly errors. The modular design of connector 7 simplifies disassembly and maintenance of the entire mechanism. Manufacturing connector 7 simply requires setting pivot points at fixed locations. For example, drilling holes in connector 7 and bolting swing arm 1 and balance bar 5 together to form pivot point 1 4 and pivot point 2 6.

[0035] As an optional implementation scheme of the driver 2, the driver 2 includes an actuator 21, a rotating shaft 22, and two gears 23 arranged on the rotating shaft 22. The actuator 21 is linked with the rotating shaft 22, and the rotating shaft 22 is driven to rotate by the actuator 21. The positions of the corresponding gears 23 on the two swing arms 1 are provided with external teeth 11 arranged along a circular arc trajectory. The gears 23 engage with the external teeth 11 and drive the swing arms 1 to swing through the rotation of the rotating shaft 22.

[0036] Actuator 21 (such as a servo motor or stepper motor) rotates shaft 22 (this can be achieved using a worm gear or bevel gear 23), which in turn engages gear 23 with external teeth 11 of swing arm 1, converting rotational motion into reciprocating swing of swing arm 1. The meshing path of gear 23 and external teeth 11 is designed to be circular, aligning with the swing path of swing arm 1 around pivot point 4, thus reducing positioning errors caused by transmission backlash.

[0037] In a further configuration, a connecting hole 71 for passing the rotating shaft 22 is further provided on the connecting member 7 . The rotating shaft 22 is installed in the connecting hole 71 through a bearing, and the displacement of the rotating shaft 22 is limited by the connecting hole 71 .

[0038] The connection hole 71 of the rotating shaft 22 is limited, which can improve the meshing stability between the gear 23 and the external tooth 11, ensure the transmission cooperation between the two, and suppress axial movement and radial runout (such as vibration transmission when the gear 23 is engaged).

[0039] The connecting hole 71 can also be located on the connecting member 7, which is convenient for one-time production of the connecting member 7. After the connecting member 7 is fixedly connected to the external bracket by bolts, the positions of the connecting hole 71, fulcrum 1 4, and fulcrum 2 6 on the connecting member 7 can be determined, thereby ensuring the accuracy of each installation.

[0040] The above solution introduces a negative pressure transfer mechanism, which can be applied to a printing device to form the following technical solutions:

[0041] A printing device includes a printing component, a printing platform, and a conveying component. The conveying component is used to convey the printing medium to the printing platform and print on the printing medium through the printing component. It also includes a negative pressure transfer mechanism such as any of the above-mentioned preferred schemes, and the printing medium is transferred to the conveying component through the negative pressure transfer mechanism.

[0042] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiment. All technical solutions based on the concept of the present invention are within the scope of protection of the present invention. It should be noted that for those skilled in the art, certain improvements and modifications that do not depart from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A negative pressure transport mechanism, characterized in that: It includes two swing arms, a driver for driving the two swing arms to swing back and forth, and a negative pressure suction device installed on the swing arms. The driver drives the swing arms to swing and moves the negative pressure suction device back and forth between a first position and a second position; the two swing arms rotate through a fulcrum at a fixed position.

2. The negative pressure transfer mechanism according to claim 1, characterized in that: The negative pressure suction device includes a connecting shaft for connecting a swing arm, a frame installed on the connecting shaft, and a plurality of negative pressure suction cups installed on the frame; the frame is rotatably installed on the connecting shaft.

3. The negative pressure transfer mechanism according to claim 2, characterized in that: It also includes a balancing rod, which is rotatably connected to the frame and is also rotatably connected to a fulcrum 2 at a fixed position; when the swing arm swings, the balancing rod swings synchronously and keeps the frame in a horizontal state.

4. The negative pressure transfer mechanism according to claim 3, characterized in that: When the swing arm swings, the position angular velocity of the connection between the swing arm and the connecting shaft is the same as the position angular velocity of the connection between the balance bar and the frame.

5. The negative pressure transfer mechanism according to claim 3 or 4, characterized in that: The first fulcrum and the second fulcrum are both located on a connecting member, and the connecting member has a connecting portion for connecting the swing arm and the balance bar, and the swing arm and the balance bar are rotatably connected to the connecting portion; the connecting member is used to be fixedly connected to the external bracket.

6. The negative pressure transfer mechanism according to claim 3 or 4, characterized in that: The driver includes an actuator, a rotating shaft, and two gears arranged on the rotating shaft. The actuator is linked to the rotating shaft and drives the rotating shaft to rotate through the actuator. The positions of the corresponding gears on the two swing arms are provided with external teeth arranged along a circular arc trajectory. The gears are engaged with the external teeth and drive the swing arms to swing through the rotation of the rotating shaft.

7. The negative pressure transfer mechanism according to claim 6, characterized in that: The first fulcrum and the second fulcrum are both located on a connecting member, and the connecting member has a connecting portion for connecting the swing arm and the balance bar, and the swing arm and the balance bar are rotatably connected to the connecting portion; the connecting member is used to be fixedly connected to the external bracket.

8. The negative pressure transfer mechanism according to claim 7, characterized in that: The connecting piece is also provided with a connecting hole for passing the rotating shaft. The rotating shaft is installed in the connecting hole through a bearing, and the deviation of the rotating shaft is limited by the connecting hole.

9. A printing device comprising a printing assembly, a printing platform, and a conveying assembly, wherein the conveying assembly is used to convey a printing medium to the printing platform and print on the printing medium through the printing assembly, characterized in that: It also includes the negative pressure transfer mechanism as described in any one of claims 1 to 8, and the printing medium is transferred to the transmission component through the negative pressure transfer mechanism.

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