High-precision plate suction machine

Abstract

The utility model discloses a high-precision board suction machine which comprises a workbench, a board suction device and a transverse moving mechanism, the workbench is used for placing a PCB and providing support for the transverse moving mechanism, and the transverse moving mechanism is used for driving the board suction device to move in the horizontal direction of the workbench; the plate suction device comprises a stepping motor, a support, a pulley mechanism, a sliding mechanism, a connecting frame, a connecting plate and a suction head assembly. According to the high-precision board suction machine provided by the utility model, the pressure borne by a PCB (Printed Circuit Board) is reduced by accurately controlling the stroke of the negative-pressure suction head and buffering a stroke unloading structure, so that the PCB is prevented from being damaged during suction operation, and the loss of the PCB in the transfer process is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of PCB board transfer equipment, specifically is a high accuracy plate suction machine. BACKGROUND

[0002] PCB board Chinese name is printed circuit board, also called printed wiring board, is important electronic component, is the support body of electronic components, is the carrier of electronic components electrical connection. The plate suction machine is a device that uses vacuum suction to lift the PCB board and send it to the next work station.

[0003] The plate suction machine usually includes a longitudinal plate suction device and a transverse moving mechanism. The longitudinal plate suction device is used to grab / unload the PCB board and lift / lower the PCB board to a specified height from the workbench. The transverse moving mechanism is used to transfer the PCB board to a specified horizontal position. The current common longitudinal plate suction device includes a negative pressure suction head and a lifting mechanism. The lifting mechanism is realized by a hydraulic cylinder or an air cylinder. The negative pressure suction head moves up and down with the extension and retraction of the hydraulic rod or the air pressure rod. The problem is that during the operation of the negative pressure suction head sucking the PCB board, the hydraulic rod or the air pressure rod drives the negative pressure suction head to move downward to contact the PCB board. In order to ensure that the PCB board is sucked 100%, the hydraulic rod or the air pressure rod still drives the negative pressure suction head to exert a downward force on the PCB board. Moreover, the movement amount of the negative pressure suction head in the vertical direction cannot be accurately controlled. For the PCB board with a larger area or thinner thickness, its pressure bearing capacity is limited. If the pressure exceeds its bearing capacity, the PCB board will be broken. SUMMARY

[0004] The utility model aims at providing a high accuracy plate suction machine to solve the problems in the background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0006] A high accuracy plate suction machine includes a workbench, a plate suction device, and a transverse moving mechanism. The workbench is used to place the PCB board and provide support for the transverse moving mechanism. The transverse moving mechanism is used to drive the plate suction device to move in the horizontal direction of the workbench.

[0007] The suction plate device comprises a stepping motor, a support, a pulley mechanism, a sliding mechanism, a connecting frame, a connecting plate and a suction head assembly, the stepping motor is fixedly arranged on the support, the pulley mechanism comprises a belt, a traction block and two fixed pulleys, the two fixed pulleys are fixedly arranged on the support, the traction block is fixedly arranged on the belt, the belt is sleeved on the two fixed pulleys, a power output shaft of the stepping motor is connected with one of the fixed pulleys, and the traction block is fixedly connected with the connecting frame; the sliding mechanism comprises a guide rail and a sliding block, the guide rail is fixedly arranged on the support, the sliding block is arranged on the guide rail, and one side of the sliding block is fixedly connected with the connecting frame; the connecting frame is fixedly connected with the connecting plate, and the suction head assembly is fixedly connected with the connecting plate.

[0008] When sucking the PCB, the stepping motor drives the pulley to rotate in the forward direction, so that the traction block on the belt moves downward, thereby driving the connecting frame to move downward along the guide rail, and the connecting plate drives the suction head assembly to move downward to suck the PCB; after the sucking is completed, the stepping motor is reversed, so that the PCB moves upward, after reaching a set height, the transverse moving mechanism drives the suction plate device to move horizontally, thereby driving the PCB to move horizontally, after reaching a discharging position, the stepping motor drives the PCB to move downward to discharge; by adopting the above structure, since the traction block can only move upward and downward on one side of the belt, by adjusting the distance between the two fixed pulleys and the length of the belt, the stroke of the suction head assembly in the vertical direction can be effectively controlled, and by single stroke control of the stepping motor, the pressure applied by the suction head assembly to the PCB can be accurately controlled, thereby protecting the PCB.

[0009] The utility model further improves, the suction head assembly includes buffer jar, transmission rod, sleeve, negative pressure air cylinder and a plurality of suction heads, the suction head is linked with negative pressure air cylinder, transmission rod's one end is fixedly connected with negative pressure air cylinder, transmission rod's other end is fixedly connected with sleeve, buffer jar is opened a plurality of through holes, sleeve is inserted in the through hole inside;When sucking the PCB, the suction head assembly is driven by the connecting plate and moves downward as a whole, after the suction head contacts the PCB, the connecting plate continues to exert the downward force, at this moment, the buffer jar moves downward relative to the transmission rod to eliminate the pressure applied to the PCB, thereby further protecting the PCB.

[0010] The utility model further improves, the suction head assembly still includes limit pin, buffer jar opens limit hole, the through hole and limit hole are linked together, the outer circumferential direction of sleeve opens limit slot, limit pin is inserted in the limit hole, limit pin can be limited to sleeve through being clamped in the limit slot.

[0011] The utility model further improves, still includes position sensor, to detect the stroke of the suction head assembly downward, when detecting the prescribed stroke, position sensor sends stop command to the stepping motor through the controller, to further protect the PCB.

[0012] The utility model further improves, still includes locating block, locating block fixed setting is in the outside of negative pressure cylinder, position sensor fixed setting is in the outside of buffer cylinder, be provided with detection bayonet on position sensor, locating block is located in the just below detection bayonet, when buffer cylinder drives position sensor to move downward, detects locating block after detection bayonet, and step motor stops rotation, and accurate control suction head stroke, protects PCB board.

[0013] The utility model discloses a kind of high-precision plate suction machines, accurate control of negative pressure suction head stroke, buffer stroke unloading structure, reduce the pressure bearing of PCB board, to protect PCB board from damage when sucking operation, reduce PCB board transfer process loss. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a kind of high-precision plate suction machine structure diagram proposed in the utility model.

[0015] Figure 2 It is Figure 1 It is the structure diagram after part shell of middle workbench removal.

[0016] Figure 3 It is the structure diagram of plate suction device.

[0017] Figure 4 It is the exploded structure diagram of plate suction device.

[0018] Figure 5 It is the structure diagram of suction head assembly.

[0019] Figure 6 It is the exploded structure diagram of suction head assembly. DETAILED DESCRIPTION

[0020] The technical scheme in the utility model embodiment will be described clearly and completely below in conjunction with the drawings in the utility model embodiment, and obviously, the described embodiment is only part of the embodiment of the utility model, not all the embodiment. Based on the embodiment in the utility model, all other embodiments obtained by the person skilled in the art without making creative labor belong to the range of protection of the utility model.

[0021] See Figures 1-6 A kind of high-precision plate suction machine, including workbench 1, plate suction device and transverse moving mechanism 3, workbench 1 is used to place PCB board 2 and provide support for transverse moving mechanism 3, transverse moving mechanism 3 is used to drive plate suction device to move in the horizontal direction of workbench 1;

[0022] The suction plate device comprises a stepping motor 4, a support 5, a pulley mechanism, a sliding mechanism, a connecting frame 6, a connecting plate 7 and a suction head assembly 8, the stepping motor 4 is fixedly arranged on the support 5, the pulley mechanism comprises a belt 9, a traction block 10 and two fixed pulleys 11, the two fixed pulleys 11 are fixedly arranged on the support 5, the traction block 10 is fixedly arranged on the belt 9, the belt 9 is sleeved on the two fixed pulleys 11, a power output shaft of the stepping motor 4 is connected with one of the fixed pulleys 11, and the traction block 10 is fixedly connected with the connecting frame 6; the sliding mechanism comprises a guide rail 12 and a sliding block 13, the guide rail 12 is fixedly arranged on the support 5, and the sliding block 13 is arranged on the guide rail 12; one side of the sliding block 13 is fixedly connected with the connecting frame 6; the connecting frame 6 is fixedly connected with the connecting plate 7, and the suction head assembly 8 is fixedly connected with the connecting plate 7.

[0023] When the PCB board 2 is sucked, the stepping motor 4 drives the pulley to rotate in the forward direction, so that the traction block 10 on the belt 9 moves downward, thereby driving the connecting frame 6 to move downward along the guide rail 12, and the connecting plate 7 drives the suction head assembly 8 to move downward to suck the PCB board 2; after the sucking is completed, the stepping motor 4 is reversed, so that the PCB board 2 moves upward, after reaching a set height, the transverse moving mechanism 3 drives the suction plate device to move horizontally, thereby driving the PCB board 2 to move horizontally, after reaching a discharging position, the stepping motor 4 drives the PCB board 2 to move downward to discharge; by adopting the above structure, since the traction block 10 can only move upward and downward on one side of the belt 9, by adjusting the distance between the two fixed pulleys 11 and the length of the belt 9, the stroke of the suction head assembly 8 in the vertical direction can be effectively controlled, and by single stroke control of the stepping motor 4, the pressure applied by the suction head assembly 8 to the PCB board 2 can be accurately controlled, thereby protecting the PCB board 2.

[0024] The utility model further improves, the suction head assembly 8 includes buffer cylinder 81, transmission rod 82, sleeve 83, negative pressure air cylinder 84 and several suction heads 85, and the suction head 85 is linked together with negative pressure air cylinder 84, one end of transmission rod 82 is fixedly connected with negative pressure air cylinder 84, the other end of transmission rod 82 is fixedly connected with sleeve 83, buffer cylinder 81 is opened several through holes 810, and sleeve 83 is inserted in through hole 810;When the PCB board 2 is sucked, the suction head assembly 8 is driven by the connecting plate 7 and moves downward as a whole, after the suction head 85 contacts the PCB board 2, the connecting plate 7 continues to exert downward force, at this moment, buffer cylinder 81 moves downward relative to transmission rod 82 to eliminate the pressure applied to the PCB board 2, thereby further protecting the PCB board 2.

[0025] The utility model further improves, the suction head assembly 8 still includes limit pin (not shown in the drawing), buffer cylinder 81 opens limit hole 811, and through hole 810 and limit hole 811 are linked together, and the outer circumferential direction of sleeve 83 opens limit slot 830, limit pin is inserted in limit hole 811, and limit pin can realize the limit for sleeve 83 by being engaged in limit slot 830.

[0026] The utility model further improves, still include position sensor 86, to detect the stroke of downward of suction head subassembly 8, when detecting the stroke of downward of position sensor 86 sends stop instruction to step motor 4 through controller to further protect PCB board 2 after detecting the stroke of downward of position sensor 86.

[0027] The utility model further improves, still include positioning block 87, positioning block 87 fixedly set up at the outside of negative pressure air cylinder 84, position sensor 86 fixedly set up at the outside of buffer cylinder 81, be provided with detection bayonet 860 on position sensor 86, positioning block 87 is located the just below of detection bayonet 860, when buffer cylinder 81 drives position sensor 86 to move downward, detection bayonet 860 detects positioning block 87, and step motor 4 stops immediately, and the stroke of suction head 85 is controlled accurately, and PCB board 2 is protected.

[0028] The utility model discloses a kind of high-precision plate suction machines, accurate control to negative pressure suction head stroke, buffer stroke unloading structure, reduce the pressure bearing of PCB board, to protect PCB board from being damaged when sucking operation, reduce PCB board transfer process loss.

[0029] The above is only the specific implementation of the utility model, so that those skilled in the art can understand or implement the utility model. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the utility model. Therefore, the utility model will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A high-precision suction plate machine, comprising a workbench, a suction plate device and a transverse moving mechanism, the workbench is used for placing a PCB board and providing support for the transverse moving mechanism, and the transverse moving mechanism is used for driving the suction plate device to move in the horizontal direction of the workbench; characterized in that: the suction plate device comprises a stepping motor, a support, a pulley mechanism, a sliding mechanism, a connecting frame, a connecting plate and a suction head assembly, the stepping motor is fixedly arranged on the support, the pulley mechanism comprises a belt, a traction block and two fixed pulleys, the two fixed pulleys are fixedly arranged on the support, the traction block is fixedly arranged on the belt, the belt is sleeved on the two fixed pulleys, a power output shaft of the stepping motor is connected with one of the fixed pulleys, and the traction block is fixedly connected with the connecting frame; the sliding mechanism comprises a guide rail and a sliding block, the guide rail is fixedly arranged on the support, the sliding block is arranged on the guide rail, and one side of the sliding block is fixedly connected with the connecting frame; the connecting frame is fixedly connected with the connecting plate, and the suction head assembly is fixedly connected with the connecting plate.

2. The high-precision board sucking machine according to claim 1, characterized in that: The suction head assembly comprises a buffer cylinder, a transmission rod, a sleeve, a negative pressure cylinder and a plurality of suction heads, the suction heads are communicated with the negative pressure cylinder, one end of the transmission rod is fixedly connected with the negative pressure cylinder, the other end of the transmission rod is fixedly connected with the sleeve, the buffer cylinder is provided with a plurality of through holes, and the sleeve is inserted into the through holes.

3. The high-precision board sucking machine according to claim 2, characterized in that: The suction head assembly further comprises a limiting pin, the buffer cylinder is provided with a limiting hole, the through hole and the limiting hole are communicated, the sleeve is provided with a limiting groove in the circumferential direction, and the limiting pin is inserted into the limiting hole, so that the limiting of the sleeve can be realized by clamping in the limiting groove.

4. The high-precision board sucking machine according to claim 1, characterized in that: Further comprising a position sensor, which is used to detect the downward stroke of the suction head assembly, and sends a stop instruction to the stepping motor through a controller when a specified stroke is detected.

5. The high-precision board sucking machine according to claim 4, characterized in that: Further comprising a positioning block, which is fixedly arranged on the outside of the negative pressure cylinder, and the position sensor is fixedly arranged on the outside of the buffer cylinder, the position sensor is provided with a detection bayonet, and the positioning block is located directly below the detection bayonet.

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