CN216511362U - Sucker device - Google Patents

Abstract

The utility model relates to a sucker device, which comprises a vacuum pump and a suction nozzle unit connected with the vacuum pump, wherein the suction nozzle unit comprises M suction nozzles; the suction nozzle and the vacuum pump are connected with each other through a first pipeline, a connecting pipeline and a second pipeline in sequence, and the inner diameter of the first pipeline is larger than that of the second pipeline; the first pipeline comprises a partition plate inside, a ball valve is arranged between the partition plate and the connecting pipeline, and the inner diameter of the ball valve is larger than that of the second pipeline and smaller than that of the first pipeline; when the pressure in the suction nozzle is greater than or equal to the pressure threshold value, the ball valve moves to the top end of the connecting pipeline under the action of the vacuum pump, and air in the suction nozzle is prevented from entering the vacuum pump. The automatic adjustment type vacuum chuck ensures the normal work of the chuck, improves the carrying efficiency and avoids the vacuum pump from doing useless work.

Description

Sucker device

Technical Field

The utility model relates to the technical field of carrying structures, in particular to a sucker device.

Background

In the field of plate material conveyance, plate material conveyance by means of automated tools is gradually starting to be realized. The automatic carrying tool generally comprises a mechanical arm and a suction cup device arranged at the front end of the mechanical arm, wherein a suction nozzle connected with a vacuum pump in the suction cup device can be adsorbed on a plate, and pressure difference is generated on two sides of the plate by vacuumizing so as to be firmly adsorbed on the suction nozzle; then the mechanical arm drives the suction nozzle and the plate to realize carrying and moving.

The mechanical arm is widely applied to a PCB collecting and releasing device. In the actual operation process, due to the fact that the sizes of the plates are different, the sizes and the densities of holes in the plates are different, part of suction nozzles often leak too much air, the suction force is insufficient, and therefore the plates are prone to falling. Referring to fig. 1, which is a schematic structural diagram of a conventional suction cup device, a first suction nozzle 11 and a second suction nozzle 12 are connected to a vacuum pump 15 through pipelines; because the plate 14 is provided with the dense through holes, and the first suction nozzle 11 is located on the dense through holes 13, the outside air flow flows into the cavity of the first suction nozzle 11 through the through holes 13 on the plate, the pressure P1 inside the cavity of the suction nozzle 11 is approximate to the atmospheric pressure P outside the plate, so that the suction force F1 generated by the first suction nozzle 11 is S1 (P-P1), wherein S1 is the contact area of the first suction nozzle 11 and the plate; i.e. it generates a suction force of substantially 0 or less, without generating an adsorption effect. However, the energy consumption of the first nozzle 11 is the largest because there is a continuous air flow to the first nozzle 11 and then to the vacuum pump, so that the vacuum pump does no work, resulting in loss of power consumption. In fig. 1, the second suction nozzle 12 is normally operated, and the suction force F2 generated by the second suction nozzle 12 is S2 (P-P1), where S2 is the contact area between the second suction nozzle 12 and the sheet material; since the second suction nozzle 12 has no through hole on the contact surface with the plate 14, the pressure inside the cavity of the second suction nozzle 12 is approximately equal to the vacuum pressure P0, so that a relatively large vacuum suction force F2 is generated, and the vacuum suction force effectively acts on the plate surface. Meanwhile, the energy consumption of the vacuum pump is low because no air flow loss exists.

In order to avoid the plate falling caused by insufficient suction force, an operator is generally required to judge the air leakage degree of the suction cup, and then the suction valve of the suction nozzle which leaks too much is turned off or the position of the suction cup device is adjusted until the suction force on the suction nozzle is enough to enable the plate to be firmly sucked. This method, which requires the operator to manually close the suction nozzle or to continuously adjust the position of the suction cup, depends on the experience of the operator and has the following adverse effects:

(1) when the air leakage degree of the suction nozzle is judged inaccurately or the valve is forgotten to be closed artificially by an operator, the plate falling phenomenon can occur, so that the plate is damaged, and the energy consumption of the vacuum pump is wasted. After the suction nozzle valve is closed by an operator, the valve needs to be opened in time before the next sucker works, so that the normal work of the sucker is ensured; if forgetting to open the valve, the suction force of the sucker is affected, so that the sucker cannot suck the board, fall off the board and the like.

(2) The process of operating personnel's adjustment sucking disc position many times has seriously influenced the efficiency of panel transport.

(3) The existing suction nozzle is frequently moved and switched on and off, particle impurities in air or on a plate can enter a vacuum pump, and the performance and the service life of the vacuum pump are influenced.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to solving, at least to some extent, one of the problems in the related art. Therefore, the first purpose of the utility model is to provide an automatic adjusting sucker device, which ensures that a ball valve is automatically closed when the suction nozzle leaks air; when the suction nozzle is normally adsorbed on the plate, the ball valve is automatically opened; through automatically regulated, ensure the normal work of sucking disc, improve handling efficiency, and avoid the vacuum pump to do useless work.

The second purpose of the utility model is to provide a filter unit in the suction nozzle, which prevents particle impurities on the plate from entering the vacuum pump and affecting the performance of the vacuum pump.

A third object of the present invention is to provide a cleaning device for a filter unit, which ensures that the filter unit can be cleaned quickly and in time.

In order to achieve the above object, the present invention provides a suction cup device, comprising a vacuum pump and a suction nozzle unit connected to the vacuum pump, wherein the suction nozzle unit comprises M suction nozzles; m is an integer greater than 0;

the suction nozzle and the vacuum pump are connected through a first pipeline, a connecting pipeline and a second pipeline in sequence, and the inner diameter of the first pipeline is larger than that of the second pipeline; the first pipeline comprises a partition plate inside, a ball valve is arranged between the partition plate and the connecting pipeline, and the inner diameter of the ball valve is larger than that of the second pipeline and smaller than that of the first pipeline;

when the pressure in the suction nozzle is greater than or equal to the pressure threshold value, the ball valve moves to the top end of the connecting pipeline under the action of the vacuum pump, so that air in the suction nozzle is prevented from entering the vacuum pump.

According to one embodiment of the utility model, the filter unit is arranged inside one side of the partition in the first pipe, which side is far away from the second pipe.

According to one embodiment of the utility model, the filter unit is a filter screen.

According to one embodiment of the utility model, the filter screen comprises filter holes, and the cross-sectional area of the filter holes close to the second pipeline is smaller than that of the filter holes far away from the second pipeline.

According to one embodiment of the utility model, an air inlet is arranged between the partition and the filter screen in the first pipe, and the air inlet is connected to the cleaning unit through a third pipe.

According to one embodiment of the utility model, the cleaning unit is a compressed air machine.

According to one embodiment of the utility model, a solenoid valve is arranged in the third conduit.

According to one embodiment of the utility model, the M suction nozzles are connected to the same vacuum pump.

According to one embodiment of the utility model, the first and second conduits are cylindrical conduits.

According to one embodiment of the utility model, the connecting duct is a tapered connecting duct.

Compared with the prior art, the technical scheme provided by the embodiment of the application has the following advantages:

(1) the utility model ingeniously utilizes the gravity action of the ball valve and the suction action of the vacuum pump on the ball valve to ensure that the ball valve is automatically closed when the suction nozzle leaks air; when the suction nozzle is normally adsorbed, the ball valve is automatically opened; the normal adsorption of the suction nozzle and the mode switching under the air leakage state can be realized without any manual operation; the efficiency of plate conveying can be ensured, and energy consumption loss caused by air entering a vacuum pump can be avoided;

(2) according to the utility model, the filtering unit is skillfully arranged in the pipeline between the suction nozzle and the vacuum pump, so that the influence of particle impurities in plates or air entering the vacuum pump on the performance of the vacuum pump is avoided;

(3) the utility model provides the cleaning unit positioned between the ball valve and the filtering unit by combining the adjusting function of the ball valve, when the cleaning unit introduces compressed air into the pipeline, the ball valve automatically blocks one side of the vacuum pump, so that the compressed air washes the filtering unit, and the particle impurities in the filtering unit can be ensured to be cleaned quickly in time.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the utility model and together with the description, serve to explain the principles of the utility model.

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.

In the drawings:

FIG. 1 is a schematic view of a prior art nozzle assembly;

FIG. 2 is a schematic view of the construction of the suction cup device of the present invention;

FIG. 3 is a schematic view of one of the distributions of the suction nozzle of the present invention in the suction cup;

reference numerals: 11-a first suction nozzle; 12-a second suction nozzle; 13-a through hole; 14-a plate material; 15-a vacuum pump; 21-a first conduit; 22-a second conduit; 23-connecting a pipe; 24-ball valve; 25-a filtration unit; 26-a third conduit; 27-an electromagnetic valve; 28-a cleaning unit; 29-partition plate.

Detailed Description

For a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings. In the following description, it is to be understood that the orientations and positional relationships indicated by "front", "rear", "upper", "lower", "left", "right", "longitudinal", "lateral", "vertical", "horizontal", "top", "bottom", "inner", "outer", "leading", "trailing", and the like are configured and operated in specific orientations based on the orientations and positional relationships shown in the drawings, and are only for convenience of describing the present invention, and do not indicate that the device or element referred to must have a specific orientation, and thus, are not to be construed as limiting the present invention.

It is also noted that, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," "disposed," and the like are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. When an element is referred to as being "on" or "under" another element, it can be "directly" or "indirectly" on the other element or intervening elements may also be present. The terms "first", "second", "third", etc. are only for convenience in describing the present technical solution, and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated, whereby the features defined as "first", "second", "third", etc. may explicitly or implicitly include one or more of such features. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the utility model. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.

Example 1

Referring to fig. 2, according to an embodiment of the present invention, there is provided a suction cup device including a vacuum pump 15 and a nozzle unit connected to the vacuum pump 15, wherein the nozzle unit includes M nozzles, and M is an integer greater than 0. The M suction nozzles can be simultaneously connected to one vacuum pump, and also can be respectively and correspondingly connected with one vacuum pump. Preferably, in practice, several suction nozzles can be connected to one and the same vacuum pump, in order to simplify the overall installation and to save energy. The configuration of the suction nozzle in the present application may be any configuration known in the art, of which the conical suction nozzle in fig. 2 is only an example.

The suction nozzle and the vacuum pump 15 are connected through a first pipeline 21, a connecting pipeline 23 and a second pipeline 22 in sequence, wherein the inner diameter of the first pipeline 21 is larger than that of the second pipeline 22, the first pipeline 21 is connected to the suction nozzle, and the second pipeline 22 is connected to the vacuum pump 15; in view of the different inner diameters of the first and second pipes 21 and 22, which need to be connected by means of the connecting pipe 23, the connecting pipe in this application can be any structure capable of connecting two pipes in the prior art. As a preferred embodiment, the first pipe and the second pipe in this application may both be cylindrical pipes; the connecting pipe may be a tapered connecting pipe.

With reference to fig. 2, in order to ensure the automatic adjustment function of the ball valve, in the present application, the first pipe 21 includes a partition 29, the partition 29 and the connecting pipe 23 are provided with the ball valve 24, and the inner diameter of the ball valve 24 is larger than the inner diameter of the second pipe 22 and smaller than the inner diameter of the first pipe 21. The ball valve structure can be any structure in the prior art, preferably, and when the first pipeline and the second pipeline are cylindrical pipelines, the ball valve structure is spherical and can be plugged between the first pipeline and the second pipeline without gaps.

When the suction cup is not in operation, the ball valve 24 is under the action of gravity and is located on the partition 29, and we define the state of the ball valve as the ball valve opening state, i.e. the ball valve is located on the partition in the first pipeline, and the first pipeline, the connecting pipeline and the second pipeline are kept unblocked. When the suction cup is adsorbed on the plate 14, under the action of the vacuum pump 15, the pressure inside the suction nozzle cavity is gradually reduced until the plate 14 is sucked up, in the process, the suction force of the vacuum pump 15 is concentrated on the plate 14, the suction force generated on the ball valve 24 is smaller than the gravity action of the ball valve, and the ball valve 24 is still in the opening state of the ball valve and is positioned on the partition plate 29. Whereas the ball valve needs to rest on the partition 29 by gravity during normal suction of the nozzle, the ball valve 24 in this application is preferably a steel ball with a certain gravity.

When the suction nozzle normally corresponds to the edge of the plate 14 or the through hole in the plate, the suction force inside the cavity of the suction nozzle is basically kept the same as the external atmospheric pressure, and the pressure intensity in the suction nozzle is greater than or equal to the pressure threshold value; the pressure threshold is defined to be a pressure value slightly smaller than atmospheric pressure, so that when the cavity of the suction nozzle is communicated with the atmosphere and is still determined to be in a gas leakage state under the action of the suction force of the vacuum pump; the specific pressure threshold may be specifically designed based on practical operating experience. In this case, the suction force of the vacuum pump 15 is concentrated on the ball valve 24, and the suction force of the vacuum pump 15 to the ball valve 24 is greater than the gravity thereof, and at this time, the ball valve 24 is moved to the top end of the connecting pipe 23 by suction, and it is noted that: the ball valve has an inner diameter smaller than that of the second pipe, so that the ball valve can only stay at the top end of the connecting pipe even under the vacuum suction. The ball valve blocks the second channel at this time, so that air in the suction nozzle can be prevented from entering the vacuum pump, and we define the ball valve state at this time as a ball valve closing state, that is, the ball valve 24 is completely blocked between the first pipeline 21 and the second pipeline 22, so that air is prevented from entering the vacuum pump.

The utility model ingeniously utilizes the gravity action of the ball valve and the suction action of the vacuum pump on the ball valve to ensure that the ball valve is automatically closed when the suction nozzle leaks air; when the pressure in the suction nozzle is smaller than the pressure threshold value, the ball valve is automatically opened; the suction nozzle can be ensured to be blocked when the suction nozzle leaks air without any manual operation, and the vacuum pump does not work on the suction nozzle; the plate conveying device can not only ensure the high efficiency of plate conveying, but also avoid the energy loss caused by air entering the vacuum pump.

Example 2

With continued reference to fig. 2, this embodiment includes the structure of embodiment 1, and in order to prevent air or particulate impurities on the plate from entering the vacuum pump along with the pipes, the filter unit 25 is disposed inside the side of the partition 29 away from the second pipe in the first pipe. The filter unit can be the arbitrary structure that can filter particle impurity among the prior art in this application, and is preferred, and it can be the filter screen, contains the filtration pore in the filter screen, ensures that gas can freely pass through, and the foreign particles is remained in the filter screen.

As a preferred embodiment, the present application may design the cross-sectional area of the filtering hole near the second pipe to be smaller than the cross-sectional area far from the second pipe, so that the impurity particles easily enter the filtering net but are difficult to pass through the filtering net.

The utility model skillfully arranges the filtering unit in the pipeline between the suction nozzle and the vacuum pump, thereby preventing particle impurities in plates or air from entering the vacuum pump to influence the performance of the vacuum pump.

Example 3

With continued reference to fig. 2, this embodiment comprises the structure of embodiment 2, in addition to which an air inlet is provided in the first conduit between the partition 29 and the filter unit 25, which air inlet is connected to the cleaning unit 28 via the third conduit 26. The cleaning unit may preferably be a compressed air machine. A valve for controlling the opening and closing of the third pipeline 26 can be arranged, preferably, an electromagnetic valve 27 can be arranged, the electromagnetic valve 27 is kept in a normally closed state, only when the filter unit 25 needs to be cleaned, the electromagnetic valve 27 is opened and the vacuum pump 15 is kept in a vacuum state, at the moment, a large amount of air enters the first pipeline 21, the ball valve 24 is in a closed state under the action of the vacuum pump 15, and compressed air is sprayed out from the suction nozzle through the filter unit 25, so that impurities in the filter unit 25 are sprayed out, and the purpose of quickly cleaning the filter screen is achieved.

The utility model provides the cleaning unit positioned between the ball valve and the filtering unit by combining the adjusting function of the ball valve, when the cleaning unit introduces compressed air into the pipeline, the ball valve automatically blocks one side of the vacuum pump, so that the compressed air washes the filtering unit, and the particle impurities in the filtering unit can be ensured to be cleaned quickly in time.

Example 4

Referring to fig. 3, M nozzles are uniformly distributed in the nozzle unit. Specifically, as shown in fig. 3, the suction nozzles are distributed in the suction cup units in a matrix form, and the encryption distribution mode enables more suction nozzles to contact the plate. When the suction nozzle does not suck the plate or the contact surface of the suction nozzle and the plate is provided with a through hole with a large aperture, the ball valve is in a closed state, and the energy of the vacuum pump is automatically distributed at the suction nozzle which is normally sucked. As shown in the attached figure 3, the suction nozzles 1 to 5 are too close to the plate edge, air leakage is serious, and a through hole with larger aperture is arranged on the contact surface of the suction nozzle 6 and the plate, as mentioned above, the ball valve in the suction nozzles 1-6 is in a closed state; ball valves in other normally-adsorbed suction nozzles are in an open state, the vacuum pump mainly acts on the other suction nozzles, and plate carrying is realized by the aid of the other suction nozzles.

It is to be understood that the foregoing examples, while indicating the preferred embodiments of the utility model, are given by way of illustration and description, and are not to be construed as limiting the scope of the utility model; it should be noted that, for those skilled in the art, the above technical features can be freely combined, and several changes and modifications can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention; therefore, all equivalent changes and modifications made within the scope of the claims of the present invention should be covered by the claims of the present invention.

Claims (10)

1. The suction cup device is characterized by comprising a vacuum pump and a suction nozzle unit connected with the vacuum pump, wherein the suction nozzle unit comprises M suction nozzles; m is an integer greater than 0;

the suction nozzle and the vacuum pump are connected with each other through a first pipeline, a connecting pipeline and a second pipeline in sequence, and the inner diameter of the first pipeline is larger than that of the second pipeline; the first pipeline comprises a partition plate inside, a ball valve is arranged between the partition plate and the connecting pipeline, and the inner diameter of the ball valve is larger than that of the second pipeline and smaller than that of the first pipeline;

when the pressure in the suction nozzle is greater than or equal to the pressure threshold value, the ball valve moves to the top end of the connecting pipeline under the action of the vacuum pump, so that air in the suction nozzle is prevented from entering the vacuum pump.

2. The suction cup device as claimed in claim 1, wherein a filter unit is provided inside a side of the partition plate of the first pipe facing away from the second pipe.

3. A suction cup device according to claim 2, wherein said filter unit is a filter net.

4. A suction cup means according to claim 3, wherein the filter net comprises filter holes, and the cross-sectional area of the filter holes near the second duct is smaller than the cross-sectional area of the filter holes far from the second duct.

5. A suction cup device according to claim 2, wherein an air inlet is provided between the partition and the filter net in the first pipe, and the air inlet is connected to the cleaning unit through a third pipe.

6. A suction cup device, according to claim 5, characterized in that said cleaning unit is a compressed air machine.

7. A suction cup device according to claim 5, wherein a solenoid valve is provided in the third conduit.

8. The suction cup device as claimed in claim 1, wherein the M suction nozzles are connected to a same vacuum pump.

9. The suction cup device of claim 1 wherein said first and second conduits are cylindrical conduits.

10. A suction cup device according to claim 9, wherein said connecting duct is a tapered connecting duct.

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