Plate fixing device of PCB printing machine

Abstract

The plate fixing device of the PCB printing machine comprises a fixing platform, a clamping plate, a lifting mechanism and a translation mechanism, a mounting cavity is formed in the fixing platform, and a strip-shaped movable hole is formed in the middle of the top of the fixing platform; the lifting mechanism is arranged at the bottom of the mounting cavity, the translation mechanism is arranged at the top of the lifting mechanism, the driving direction is consistent with the length direction of the movable hole, the two clamping plates are arranged on the translation mechanism, and the tops of the clamping plates penetrate through the movable hole and extend to the top of the fixed platform; the translation mechanism drives the two clamping plates in opposite directions. According to the plate fixing device of the PCB printing machine, the height of the top side of the clamping plate can be conveniently adjusted, and the application range is widened.

Description

Technical Field

[0001] The utility model relates to the field of PCB board production, in particular to a board fixing device of a PCB board printing machine. Background Art

[0002] PCB printers are used to print solder paste on circuit boards. Generally, the circuit board to be printed is fixed first on the printing positioning table, and then the left and right scrapers of the printer print the solder paste or red glue through the steel mesh to the corresponding pads. The PCB with uniform printing is input to the placement machine through the transmission table for automatic placement.

[0003] Circuit boards are generally fixed by clamping both sides. However, when clamping thin circuit boards, the top side of the clamp tends to be higher than the circuit board, making it difficult for the stencil to fit tightly against the circuit board, affecting the printing of solder paste and limiting its use. Utility Model Content

[0004] In response to the above problems, the utility model provides a plate fixing device for a PCB printing machine, which facilitates the adjustment of the height of the top side of the clamping plate and increases the scope of application.

[0005] The technical solution of the utility model is as follows:

[0006] A plate fixing device for a PCB printing machine includes a fixed platform, a clamping plate, a lifting mechanism and a translation mechanism. The fixed platform is provided with a mounting cavity inside, and a strip-shaped movable hole is provided in the middle of the top of the fixed platform; the lifting mechanism is provided at the bottom of the mounting cavity, and the translation mechanism is provided at the top of the lifting mechanism, with the driving direction being consistent with the length direction of the movable hole. The clamping plate includes two pieces and is provided on the translation mechanism. The top of the clamping plate extends through the movable hole to the top of the fixed platform; the translation mechanism drives the two clamping plates in opposite directions.

[0007] In a further technical solution, the lifting mechanism includes an electric telescopic rod and a lifting plate, the lifting plate is arranged at the top of the electric telescopic rod, and the translation mechanism is arranged on the lifting plate.

[0008] In a further technical solution, the translation mechanism includes a motor, a bidirectional screw and a support seat. The motor and the support seat are respectively arranged on both sides of the lifting plate. One end of the bidirectional screw is connected to the motor, and the other end is rotatably connected to the support seat. The bottom of the splint is provided with a screw hole matching the bidirectional screw, and the screw holes of the two splints are respectively sleeved on two places with opposite rotation directions of the bidirectional screw.

[0009] In a further technical solution, the inner side wall of the installation cavity is provided with a first slide rail, and the side wall of the lifting plate is slidably connected to the first slide rail.

[0010] In a further technical solution, a second slide rail for slidingly connecting the splint is provided on the lifting plate.

[0011] In a further technical solution, the movable holes include multiple ones, and the multiple movable holes are arranged side by side. The splint includes a connecting portion and a toothed portion spaced apart on the top side of the connecting portion. The screw holes are arranged at the connecting portion. The toothed portions are the same in number as the movable holes, and the top side is arranged through the movable holes.

[0012] The beneficial effects of the utility model are:

[0013] 1. The circuit board to be printed is clamped and fixed on the fixed platform by the clamping plate. When fixed, the height of the top side of the clamping plate can be adjusted by the lifting mechanism to be lower than the top side of the circuit board. After adjustment, the clamping plate is moved by the translation mechanism to complete the clamping of the circuit board. Since the movable hole is strip-shaped, the movable range of the clamping plate is within the movable hole, the range is large, and it is suitable for circuit boards of different sizes;

[0014] 2. Set the first slide rail to slide and connect the lifting plate, so that the lifting plate can be lifted and lowered smoothly. Set the second slide rail to slide and connect the clamping plate, so as to reduce the movement resistance of the clamping plate and ensure smooth movement.

[0015] 3. Multiple movable holes are set, and the movable holes correspond to the tooth-shaped parts of multiple clamping plates, which is conducive to clamping the edges of larger-sized circuit boards at multiple locations. At the same time, the width of the movable holes is reduced, so that the top surface of the fixed platform provides stable support for the circuit board, the clamping and fixation are more stable, and the scope of application is further improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a cross-sectional schematic diagram of a plate fixing device of a PCB printing machine according to an embodiment of the present utility model;

[0017] Figure 2 This is a schematic top view of a plate fixing device of a PCB printing machine according to an embodiment of the present utility model;

[0018] Figure 3 It is a structural schematic diagram of the splint described in an embodiment of the utility model.

[0019] Description of reference numerals:

[0020] 10. Fixed platform; 11. Movable hole; 12. First slide rail; 20. Clamp; 21. Screw hole; 22. Connecting part; 23. Toothed part; 31. Electric telescopic rod; 32. Lifting plate; 33. Second slide rail; 41. Motor; 42. Bidirectional screw rod; 43. Support seat. DETAILED DESCRIPTION

[0021] The embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0022] Example:

[0023] like Figure 1-Figure 2 The cam 32 is provided with a plurality of movable holes 11 on the top of the cam 32 and a plurality of movable holes 11 on the top of the cam 32.

[0024] The working principle of the above technical solution is as follows:

[0025] When using this fixing device to fix the circuit board, the circuit board is placed between the two clamps 20 on the fixed platform 10, and the electric telescopic rod 31 can be started to adjust the height of the lifting plate 32 until the top side of the clamp 20 is lower than the bottom side of the circuit board and higher than the top side of the fixed platform 10. After adjustment, the motor 41 is started to rotate the bidirectional screw 42, so that the clamps 20 move closer to each other, clamping the two sides of the circuit board firmly.

[0026] In another embodiment, Figure 1 As shown, the inner side wall of the installation cavity is provided with a first slide rail 12, and the side wall of the lifting plate 32 is slidably connected to the first slide rail 12; the lifting plate 32 is provided with a second slide rail 33 slidably connected to the clamping plate 20.

[0027] The first slide rail 12 is provided to be slidably connected to the lifting plate 32 so that the lifting plate 32 can be lifted and lowered smoothly. The second slide rail 33 is provided to be slidably connected to the clamping plate 20 so as to reduce the movement resistance of the clamping plate 20 and ensure smooth movement.

[0028] In another embodiment, Figure 2-3 As shown, the movable holes 11 include four, and the four movable holes 11 are arranged side by side. The splint 20 includes a connecting portion 22 and a toothed portion 23 spaced apart on the top side of the connecting portion 22. The screw holes 21 are provided at the connecting portion 22. The toothed portion 23 has the same number as the movable holes 11, and the top side is provided through the movable hole 11.

[0029] A plurality of movable holes 11 are provided, and the movable holes 11 correspond to the toothed portions 23 of the plurality of clamping plates 20, which is conducive to clamping the edges of larger-sized circuit boards at multiple locations while reducing the width of the movable holes 11, so that the top surface of the fixed platform 10 provides stable support for the circuit board, the clamping and fixing are more stable, and the scope of application is further improved.

[0030] The above-described embodiments merely represent specific implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the scope of the present invention, all of which fall within the scope of protection of the present invention.

Claims

1. A plate fixing device for a PCB printing machine, characterized in that: The device comprises a fixed platform, a clamping plate, a lifting mechanism and a translation mechanism. The fixed platform is provided with a mounting cavity, and a strip-shaped movable hole is provided in the middle of the top of the fixed platform. The lifting mechanism is provided at the bottom of the mounting cavity, and the translation mechanism is provided at the top of the lifting mechanism. The driving direction is consistent with the length direction of the movable hole. The clamping plate comprises two pieces and is provided on the translation mechanism. The top of the clamping plate extends through the movable hole to the top of the fixed platform. The translation mechanism drives the two clamping plates in opposite directions.

2. The plate fixing device of a PCB printing machine according to claim 1, characterized in that: The lifting mechanism comprises an electric telescopic rod and a lifting plate, wherein the lifting plate is arranged at the top end of the electric telescopic rod, and the translation mechanism is arranged on the lifting plate.

3. The plate fixing device of a PCB printing machine according to claim 2, characterized in that: The translation mechanism includes a motor, a bidirectional screw and a support seat. The motor and the support seat are respectively arranged on both sides of the lifting plate. One end of the bidirectional screw is connected to the motor, and the other end is rotatably connected to the support seat. The bottom of the splint is provided with a screw hole matching the bidirectional screw. The screw holes of the two splints are respectively sleeved on two places where the bidirectional screw rotates in opposite directions.

4. The plate fixing device of a PCB printing machine according to claim 2, characterized in that: The inner side wall of the installation cavity is provided with a first slide rail, and the side wall of the lifting plate is slidably connected to the first slide rail.

5. The plate fixing device of a PCB printing machine according to claim 3, characterized in that: The lifting plate is provided with a second slide rail for sliding connection with the clamping plate.

6. The plate fixing device of a PCB printing machine according to claim 3, characterized in that: The movable holes include multiple ones, and the multiple movable holes are arranged side by side. The splint includes a connecting part and a toothed part spaced apart on the top side of the connecting part. The screw holes are provided at the connecting part. The number of the toothed parts is the same as that of the movable holes, and the top side is provided through the movable holes.

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