WO2020238547A1

WO2020238547A1 - Plate suction device

Info

Publication number: WO2020238547A1
Application number: PCT/CN2020/087898
Authority: WO
Inventors: 李景涛; 吕敏; 朱坡; 杨凯
Original assignee: 南京协辰电子科技有限公司
Priority date: 2019-05-28
Filing date: 2020-04-29
Publication date: 2020-12-03
Also published as: CN210655204U

Abstract

A plate suction device, comprising: a suction body; and a detection assembly provided at one side of the suction body, comprising a distance sensor (1) and a moving structure (2) spaced apart from the distance sensor (1); the moving structure (2) has a first position in contact with a plate and a second position out of contact with the plate, when the moving structure (2) is in the second position, a first end close to the plate protrudes from a suction end of the suction body, and when the moving structure (2) transits between the first position and the second position, the distance sensor (1) is configured to detect a change in a distance between the distance sensor and a second end of the moving structure (2) away from the plate. Provided is a plate suction device capable of making a determination in a timely and accurate manner.

Description

Plate body adsorption device

Technical field

The utility model relates to the technical field of plate body processing, in particular to a plate body adsorption device.

Background technique

In the loading and unloading system of the printed circuit board (PCB board) automatic testing equipment, the clamping of the PCB board generally has two forms of fixture and suction. The current suction device usually adopts the method of visual observation or vacuum degree judgment on whether the plate body is completely adsorbed or whether the plate is dropped. The visual observation has a large error, and it may be inconvenient to observe directly due to the equipment itself; The method of determining the degree of determination is due to the existence of holes on the PCB, which may cause fluctuations in the pressure value in the vacuum chamber, which also affects the accuracy of the determination.

Utility model content

Therefore, the technical problem to be solved by the present utility model is to overcome the defects of inaccurate and large error in judging whether the suction device has absorbed the plate body or whether the plate is dropped in the prior art, thereby providing a timely and accurate judgment Plate body adsorption device.

In order to solve the above technical problems, the present utility model provides a plate body adsorption device, which includes:

Adsorb the body;

The detection component is arranged on one side of the adsorption body and includes a distance sensor and a moving structure spaced apart from the distance sensor. The moving structure has a first position set in contact with the board body and set apart from the board body In the second position, when the moving structure is in the second position, the first end of the board protrudes from the suction end of the suction body, and the moving structure is in the first position and When switching between the second positions, the distance sensor is used to detect a change in the distance between the distance sensor and the second end of the moving structure away from the board.

In the plate suction device, the moving direction of the moving structure is parallel to the suction direction of the suction body to the plate.

In the board adsorption device, the moving structure includes a first mechanism and a second mechanism that are slidably connected, and a reset mechanism is also provided between the first mechanism and the second mechanism.

In the plate adsorption device, the first mechanism is a mounting bracket fixed to the side of the adsorption body, the second mechanism is a sliding rod provided in the mounting bracket, and the reset mechanism is a sleeve An elastic member arranged on the sliding rod, the sliding rod moves toward the distance sensor when receiving the contact force of the plate body, and when the contact force of the plate body disappears, the elastic member Keep away from the distance sensor under the action.

In the plate adsorption device, the mounting bracket includes a mounting plate fixed to the side of the adsorption body and a sleeve provided at one end of the mounting plate, the sliding rod is provided in the sleeve, and The distance sensor is arranged on the other end of the mounting plate opposite to the sleeve.

In the plate suction device, two ends of the sliding rod are respectively formed with a protrusion, the diameter of the protrusion is greater than the inner diameter of the sleeve, and the length of the sliding rod is greater than the length of the sleeve.

In the plate suction device, the elastic member is provided at one end of the sliding rod close to the plate.

In the plate suction device, the suction body includes an installation platform and a vacuum suction assembly arranged on the installation platform, the vacuum suction assembly includes a plurality of suction nozzles, and each of the suction nozzles is provided with a valve .

In the plate adsorption device, the vacuum adsorption assembly further includes at least one vacuum generator and a vacuum cavity connected to the vacuum generator, and the suction nozzle is connected to the vacuum cavity through the valve .

In the plate adsorption device, the valve is a check valve or an electromagnetic valve.

The technical scheme of the utility model has the following advantages:

1. In the plate suction device provided by the present invention, when the suction body produces suction action on the plate body, the first end of the moving structure protrudes from the suction end of the suction body, so that the first end of the moving structure is It will come into contact with the plate body, and the plate body will exert a force on the moving structure to move in the direction close to the distance sensor. The distance sensor detects the change in the distance between it and the second end of the moving structure to determine that the adsorption action is completed; When the board phenomenon occurs, the moving structure automatically moves to the second position. At this time, the distance sensor also detects the change in the distance between it and the second end of the moving structure, so as to determine that the board is dropped and the judgment is timely and accurate.

2. In the plate adsorption device provided by the utility model, the moving direction of the moving structure is parallel to the adsorption direction of the adsorption body to the plate. This makes the structure of the entire device simpler, and the judgment is more accurate, and the error is minimized.

3. In the plate adsorption device provided by the utility model, the reset mechanism between the first mechanism and the second mechanism is arranged so that when the plate is dropped, the second mechanism can automatically return to the second position, so that the distance sensor can determine Timely and accurate to facilitate the next test.

4. In the plate adsorption device provided by the utility model, the protrusions at both ends of the sliding rod can prevent the sliding rod from slipping from the sleeve during the sliding process. The length of the sliding rod is greater than the length of the sleeve, which is the movement of the sliding rod. Provide a certain displacement space.

5. In the plate adsorption device provided by the utility model, the valve on the suction nozzle is arranged so that even if the plate corresponding to the suction nozzle has holes, the suction nozzle can be closed in time through the valve, thereby ensuring the negative pressure inside the vacuum suction assembly Stable, improve the adsorption effect and realize automatic adjustment.

Description of the drawings

In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings that need to be used in the specific embodiments or the description of the prior art. Obviously, in the following description The drawings are some embodiments of the present utility model. For those of ordinary skill in the art, without creative work, other drawings can be obtained from these drawings.

Figure 1 is a schematic diagram of the plate adsorption device provided by the utility model;

Figure 2 is an exploded view of Figure 1;

Fig. 3 is a schematic diagram of the detection component in Fig. 2.

Description of reference signs:

1-Distance sensor; 2-Mobile structure; 3-Mounting platform; 4-Vacuum suction assembly; 21-First mechanism; 22-Second mechanism; 23-Reset mechanism; 31-Adapter plate; 32-Connecting plate; 41 -Vacuum generator; 42-Vacuum cavity; 43-Suction nozzle; 44-Valve; 211-Mounting plate; 212-Sleeve; 221-Protrusion; 421-Cover body; 422-cavity; 4211-Air inlet ; 4221-Opening.

Detailed ways

The technical solution of the present utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present utility model, not all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present utility model.

In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

A specific implementation of the board adsorption device shown in Figures 1-3, the board in this embodiment is a PCB board, and the adsorption device includes a adsorption body and a detection component provided on one side of the adsorption body. The detection component includes a distance sensor 1 and a moving structure 2 spaced apart from the distance sensor 1. The distance sensor 1 is a reflective photoelectric sensor. The moving structure 2 has a first position set in contact with the board and is connected to the board. When the moving structure 2 is located in the second position, the first end of the board protrudes from the suction end of the suction body when the movable structure 2 is located in the second position. If the suction direction is vertical upward, the lowest point of the mobile structure 2 is set lower than the lowest point of the suction body; when the mobile structure 2 switches between the first position and the second position, the distance sensor 1 It is used to detect the change of the distance between it and the second end of the moving structure 2 far from the board body, and judge whether the adsorption or shedding of the PCB board is completed through the change of the distance, and the judgment is more timely and accurate.

In order to facilitate the installation of the detection component and try not to change the structure and position of other components, the moving direction of the moving structure 2 is parallel to the suction direction of the suction body to the board. In this embodiment, as shown in Figures 1 and 2, both are vertically downward.

The moving structure 2 includes a first mechanism 21 and a second mechanism 22 slidably connected, and a reset mechanism 23 is also provided between the first mechanism 21 and the second mechanism 22.

As a specific embodiment, the first mechanism 21 is a mounting bracket fixed to the side of the adsorption body, an installation space is formed on the mounting bracket, and the second mechanism 22 is a mounting bracket provided on the mounting bracket. The sliding rod in the installation space, the sliding rod reciprocates in the installation space when it receives an external force, the reset mechanism 23 is an elastic member sleeved on the sliding rod, and the elastic member may be a spring. The sliding bar moves toward the distance sensor 1 when receiving the abutting force of the board. At this time, the distance between the sliding bar and the distance sensor 1 is reduced, and when the abutting force of the board disappears, that is, When the PCB board falls off, it moves away from the distance sensor 1 under the action of the elastic member. At this time, the distance between the sliding rod and the distance sensor 1 increases, and the distance sensor 1 detects the change of the distance and makes a corresponding judgment.

As shown in Figure 3, the mounting bracket includes a mounting plate 211 fixed to the side of the adsorption body and a sleeve 212 provided at one end of the mounting plate 211. The sleeve 212 can be fixed on the mounting plate 211 by screws. , Or integrally formed with the mounting plate 211, the sliding rod is disposed in the sleeve 212, and the distance sensor 1 is disposed on the other end of the mounting plate 211 opposite to the sleeve 212. Specifically, two ends of the sliding rod are respectively formed with a protrusion 221, the diameter of the protrusion 221 is greater than the inner diameter of the sleeve 212, and the length of the sliding rod is greater than the length of the sleeve 212, namely A part of the sliding rod is exposed to the outside of the sleeve 212 to change the distance from the distance sensor 1. The elastic member is provided at one end of the sliding rod close to the plate body, and the two ends of the elastic member respectively abut on one end of the sleeve 212 and a protrusion 221 of the sliding rod to ensure that the sliding rod is on the edge When the inside of the sleeve 212 moves, it can be compressed and stored as power for the sliding rod to slide in the reverse direction.

As shown in Figures 1 and 2, the suction body includes an installation platform 3 and a vacuum suction assembly 4 arranged on the installation platform 3. The installation platform 3 includes an adapter plate 31 and oppositely arranged on the side of the adapter plate 31 A pair of connecting plates 32, the adapter plate 31 and the connecting plate 32 are fixed by screws, and the vacuum suction assembly 4 is fixed on the connecting plate 32. The vacuum suction assembly 4 includes two vacuum generators 41, a vacuum chamber 42 connected to the vacuum generator 41, and a plurality of suction nozzles 43 arranged at the bottom of the vacuum chamber 42. Two vacuum generators 41 are arranged side by side under the adapter plate 31. The vacuum chamber 42 is composed of a cover 421 and a cavity 422 arranged under the cover 421. The cover 421 and the cavity 422 are connected by screws, and the cover The body 421 is formed with two air inlets 4211, the outlet of the vacuum generator 41 is connected to the air inlet 4211, the bottom of the cavity 422 is formed with a plurality of openings 4221, and the plurality of suction nozzles 43 are respectively installed and fixed in the plurality of In the opening 4221, each of the suction nozzles 43 is provided with a valve 44, the suction nozzle 43 is connected to the vacuum chamber 42 through the valve 44, and the suction nozzle 43 is directly connected to the vacuum through the valve 44 The device 41 is connected, there is no pressure loss along the way, the vacuum negative pressure is more evenly distributed, and the suction effect is better. The valve 44 is a check valve or a solenoid valve.

During operation, the vacuum generator 41 generates negative pressure, and the negative pressure is evenly distributed to the suction nozzles 43 through the vacuum cavity 42 to complete the suction action. When encountering a hole on the PCB board, the valve 44 will automatically determine whether the suction nozzle 43 covers the hole. If it covers the hole, it will close the air path of the suction nozzle 43 by itself to ensure the negative pressure inside the vacuum chamber 42 Stable, the other suction nozzles 43 are still working normally.

When the suction nozzle 43 sucks the PCB board under the action of the vacuum generator 41 and the vacuum chamber 42, because the bottom end of the sliding rod is set below the lowest point of the suction nozzle 43, the PCB board exerts a vertical upward action on the sliding rod Therefore, the spring on the slide bar is compressed, and the spring accumulates energy. The distance between the highest point of the slide bar and the distance sensor 1 is reduced. The distance sensor 1 detects the change value and determines that the adsorption is completed. If the distance is within a certain time If the inside remains unchanged, the adsorption is firm. When the PCB board falls off, its abutting force on the slide bar disappears, the spring releases energy, and then drives the slide bar to move downwards. The distance between the highest point of the slide bar and the distance sensor 1 increases, and the distance sensor 1 detects the change Value, it is determined that the PCB board is off.

As an alternative embodiment, the moving direction of the moving structure 2 may also be set at an angle of 10-30° with the suction direction of the suction body to the plate.

As an alternative embodiment, the first mechanism 21 is a slide rail fixed to the side of the suction body, and the second mechanism 22 is a slider that is matched with the slide rail. The side of the slider is connected to the side of the slide rail by a spring. , The installation position of the spring should not affect the normal sliding of the slider along the slide rail.

Obviously, the above-mentioned embodiments are merely examples for clear description, and are not intended to limit the implementation. For those of ordinary skill in the art, other changes or changes in different forms can be made on the basis of the above description. It is unnecessary and impossible to list all the implementation methods here. The obvious changes or changes derived from this are still within the protection scope of the invention.

Claims

A plate body adsorption device, characterized in that it comprises:

Adsorb the body;

The detection component is arranged on one side of the adsorption body, and includes a distance sensor (1) and a moving structure (2) spaced apart from the distance sensor (1), and the moving structure (2) is provided in contact with the board When the moving structure (2) is located in the second position, the first end of the board protrudes from the suction main body. When the moving structure (2) is switched between the first position and the second position, the distance sensor (1) is used to detect that it is away from the moving structure (2) from the board. The distance between the second ends of the body changes.
The plate suction device according to claim 1, wherein the moving direction of the moving structure (2) is parallel to the suction direction of the suction body to the plate.
The plate suction device according to claim 1, wherein the moving structure (2) comprises a first mechanism (21) and a second mechanism (22) that are slidably connected, and the first mechanism (21) A reset mechanism (23) is also provided between the second mechanism (22).
The plate suction device according to claim 3, wherein the first mechanism (21) is a mounting bracket fixed to the side of the suction body, and the second mechanism (22) is installed at the In the sliding rod in the mounting bracket, the reset mechanism (23) is an elastic piece sleeved on the sliding rod, and the sliding rod faces the distance sensor (1) when receiving the contact force of the plate body Move, and when the contact force of the plate body disappears, move away from the distance sensor (1) under the action of the elastic member.
The plate adsorption device according to claim 4, wherein the mounting bracket comprises a mounting plate (211) fixed to the side of the adsorption body and a sleeve provided at one end of the mounting plate (211) (212), the sliding rod is arranged in the sleeve (212), and the distance sensor (1) is arranged on the other end of the mounting plate (211) opposite to the sleeve (212).
The plate suction device according to claim 5, wherein the two ends of the sliding rod are respectively formed with a protrusion (221), and the diameter of the protrusion (221) is larger than that of the sleeve (212). Inner diameter, and the length of the sliding rod is greater than the length of the sleeve (212).
7. The plate adsorption device according to claim 6, wherein the elastic member is provided at an end of the sliding rod close to the plate.
The board adsorption device according to any one of claims 1-7, wherein the adsorption body comprises a mounting platform (3) and a vacuum adsorption assembly (4) provided on the mounting platform (3), The vacuum suction assembly (4) includes a plurality of suction nozzles (43), and each of the suction nozzles (43) is provided with a valve (44).
The board adsorption device according to claim 8, characterized in that the vacuum adsorption assembly (4) further comprises at least one vacuum generator (41) and a vacuum chamber (41) connected to the vacuum generator (41). 42), the suction nozzle (43) is connected to the vacuum chamber (42) through the valve (44).
The plate adsorption device according to claim 9, characterized in that the valve (44) is a check valve or a solenoid valve.