Suction head device for PCB suction machine

Abstract

The utility model discloses a suction head device for a PCB (printed circuit board) suction machine, which 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; when a PCB is sucked for operation, the suction head device is driven by the connecting plate to integrally move downwards, after the suction head makes contact with the PCB, the connecting plate continues to apply downward acting force, and at the moment, the buffering cylinder moves downwards relative to the transmission rod so as to eliminate pressure applied to the PCB and protect the PCB. According to the suction head device for the PCB suction machine, the pressure borne by a PCB is reduced through accurate control over the stroke of the negative pressure suction head and a buffering stroke force 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] This utility model relates to the field of PCB board transfer equipment, specifically a suction head device for a PCB board suction machine. Background Art

[0002] PCB, or Printed Circuit Board, is an important electronic component. It serves as the support for electronic components and the carrier for their electrical connections. A vacuum suction machine is a device that uses vacuum suction to lift and transport PCBs to the next workstation.

[0003] A PCB suction machine typically includes a longitudinal suction device and a lateral moving mechanism. The longitudinal suction device is used to grab / unload the PCB and lift / lower it from the worktable to a specified height. The lateral moving mechanism is used to transfer the PCB to a specified horizontal position. Currently, common longitudinal suction devices include a negative pressure suction head and a lifting mechanism. The lifting mechanism uses a hydraulic or pneumatic cylinder, and the negative pressure suction head moves up and down with the extension and retraction of the hydraulic or pneumatic rod. The problem is that during the PCB suction process, after the hydraulic or pneumatic rod drives the negative pressure suction head downwards and contacts the PCB, to ensure 100% PCB suction, the hydraulic or pneumatic rod continues to exert a downward force on the PCB. Furthermore, the vertical movement of the negative pressure suction head cannot be precisely controlled. For PCBs with large areas or thin thicknesses, their pressure-bearing capacity is limited; exceeding this capacity will cause the PCB to break. Utility Model Content

[0004] The purpose of this invention is to provide a suction head device for a PCB suction machine to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A suction head device for a PCB suction machine includes a buffer cylinder, a transmission rod, a sleeve, a negative pressure cylinder, and several suction heads. The suction heads are connected to the negative pressure cylinder. One end of the transmission rod is fixedly connected to the negative pressure cylinder, and the other end of the transmission rod is fixedly connected to the sleeve. The buffer cylinder has several through holes, and the sleeve is inserted into the through holes. When suctioning PCB boards, the suction head device is driven downward by a connecting plate. After the suction head contacts the PCB board, the connecting plate continues to apply a downward force. At this time, the buffer cylinder moves downward relative to the transmission rod to relieve the pressure applied to the PCB board and protect the PCB board.

[0007] This utility model is further improved by including a limiting pin, a limiting hole in the buffer cylinder, a through hole and a limiting hole connected together, a limiting groove in the outer circumferential direction of the sleeve, and a limiting pin inserted into the limiting hole. The limiting pin can limit the sleeve by engaging with the limiting groove.

[0008] This invention is further improved by including a position sensor to detect the downward stroke of the suction head device. When the specified stroke is detected, the position sensor sends a stop command to the suction machine through the controller to prevent the suction head from continuing to apply pressure to the PCB board, thereby further protecting the PCB board.

[0009] This utility model is further improved by including a positioning block, which is fixedly installed on the outside of the negative pressure cylinder. The position sensor is fixedly installed on the outside of the buffer cylinder. The position sensor is provided with a detection slot, and the positioning block is located directly below the detection slot. When the buffer cylinder drives the position sensor to move downward, the detection slot detects the positioning block, and the suction machine stops rotating, accurately controlling the suction head stroke and protecting the PCB board.

[0010] The PCB suction head device proposed in this utility model reduces the pressure on the PCB board by precisely controlling the stroke of the negative pressure suction head and using a buffer stroke force relief structure, thereby protecting the PCB board from damage during suction operations and reducing losses during PCB board transfer. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the suction head device for a PCB suction machine proposed in this utility model.

[0012] Figure 2 for Figure 1 A schematic diagram of its decomposed structure. DETAILED DESCRIPTION

[0013] 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 only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0014] See Figure 1-2 A suction head device for a PCB suction machine includes a buffer cylinder 1, a transmission rod 2, a sleeve 3, a negative pressure cylinder 4, and several suction heads 5. The suction heads 5 are connected to the negative pressure cylinder 4. One end of the transmission rod 2 is fixedly connected to the negative pressure cylinder 4, and the other end of the transmission rod 2 is fixedly connected to the sleeve 3. The buffer cylinder 1 has several through holes 10, and the sleeve 3 is inserted into the through holes 10. When suctioning PCB boards, the suction head device is driven downward by the connecting plate. After the suction head 5 contacts the PCB board, the connecting plate continues to apply a downward force. At this time, the buffer cylinder 1 moves downward relative to the transmission rod 2 to relieve the pressure applied to the PCB board and protect the PCB board.

[0015] This utility model is further improved by including a limiting pin (not shown in the figure), the buffer cylinder 1 has a limiting hole 11, the through hole 10 and the limiting hole 11 are connected, the sleeve 3 has a limiting groove 30 in the outer circumferential direction, the limiting pin is inserted into the limiting hole 11, and the limiting pin can limit the sleeve 3 by engaging with the limiting groove 30.

[0016] This invention is further improved by including a position sensor 6, which is used to detect the downward stroke of the suction head device. When the specified stroke is detected, the position sensor 6 sends a stop command to the suction machine through the controller to prevent the suction head 5 from continuing to apply pressure to the PCB board, thereby further protecting the PCB board.

[0017] This utility model is further improved by including a positioning block 7, which is fixedly installed on the outside of the negative pressure cylinder 4. The position sensor 6 is fixedly installed on the outside of the buffer cylinder 1. The position sensor 6 is provided with a detection slot 60, and the positioning block 7 is located directly below the detection slot 60. When the buffer cylinder 1 drives the position sensor 6 to move downward, the detection slot 60 detects the positioning block 7, and the suction machine stops rotating, accurately controlling the stroke of the suction head 5 and protecting the PCB board.

[0018] The PCB suction head device proposed in this utility model reduces the pressure on the PCB board by precisely controlling the stroke of the negative pressure suction head and using a buffer stroke force relief structure, thereby protecting the PCB board from damage during suction operations and reducing losses during PCB board transfer.

[0019] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A suction head device for a PCB suction machine, characterized in that: It includes a buffer cylinder, a transmission rod, a sleeve, a negative pressure cylinder, a positioning block, a position sensor, and several suction heads. The suction heads are connected to the negative pressure cylinder. One end of the transmission rod is fixedly connected to the negative pressure cylinder, and the other end of the transmission rod is fixedly connected to the sleeve. The buffer cylinder has several through holes, and the sleeve is inserted into the through holes. The positioning block is fixedly set on the outside of the negative pressure cylinder, and the position sensor is fixedly set on the outside of the buffer cylinder. The position sensor is provided with a detection slot, and the positioning block is located directly below the detection slot. The position sensor is used to detect the downward stroke of the suction head device.

2. The suction head device for a PCB suction machine according to claim 1, characterized in that: It also includes a limiting pin, a buffer cylinder with a limiting hole, a through hole and a limiting hole connected together, a limiting groove in the outer circumference of the sleeve, and a limiting pin inserted into the limiting hole. The limiting pin can limit the sleeve by engaging with the limiting groove.

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