CN215548197U - Vacuum chuck - Google Patents

Abstract

The utility model relates to a vacuum sucker, which comprises a sucker base, a cushion block and a sealing strip, wherein the sucker base is provided with a closed ring groove which extends into a polygon along the whole peripheral edge and a gas passing hole which is used for communicating an external negative pressure machine; the sealing strip comprises a mounting root part clamped in the closed-loop groove and a sealing head part exposed outside the closed-loop groove; the sucking disc base and the sealing strip enclose a negative pressure energy storage cavity together, the cushion block is installed on the sucking disc base in the negative pressure energy storage cavity, the height of the cushion block is set to be higher than the closed ring groove and lower than the sealing head in a non-working state, and the cushion block is provided with a gas passing groove communicated with the negative pressure energy storage cavity. The utility model can be suitable for adsorption of various working surfaces, and is safe and reliable.

Description

Vacuum chuck

Technical Field

The utility model relates to the technical field of suckers, in particular to a vacuum sucker.

Background

Vacuum chuck cooperation external negative pressure machine has all uses in many fields, but most of present vacuum chuck only to the absorption on rough surface, i.e. not smooth surface, and the range of application is narrower.

SUMMERY OF THE UTILITY MODEL

To overcome the deficiencies of the prior art, it would be advantageous to provide a vacuum chuck that can extend the range of application surfaces.

In order to achieve the purpose, the utility model provides a vacuum chuck, which comprises a chuck base, a cushion block and a sealing strip, wherein the chuck base is provided with a closed ring groove which extends into a polygon along the whole peripheral edge and an air passing hole which is used for communicating an external negative pressure machine; the sealing strip comprises a mounting root part clamped in the closed-loop groove and a sealing head part exposed outside the closed-loop groove; the sucking disc base and the sealing strip enclose a negative pressure energy storage cavity together, the cushion block is installed on the sucking disc base in the negative pressure energy storage cavity, the height of the cushion block is set to be higher than the closed ring groove and lower than the sealing head in a non-working state, and the cushion block is provided with a gas passing groove communicated with the negative pressure energy storage cavity.

Furthermore, two cushion blocks are installed on the base of the sucking disc, and air passing grooves of the two cushion blocks are arranged in an aligned mode.

Still further, the cushion constitutes flexible material cushion.

Still further, the cross section of close ring groove is big end down structure.

Still further, the air passing hole is one or more.

Furthermore, the sealing strip is a rubber sealing strip or a silica gel sealing strip or a silicon rubber sealing strip.

Still further, the sealing strip has a cross-sectional structure which is symmetrical up and down or a cross-sectional structure which is small in top and large in bottom.

And furthermore, the base of the sucker is an iron base or an aluminum alloy base or a carbon steel base.

Still further, the iron base includes square pipe and the panel beating of welding together, and wherein, closed loop groove is formed through opening on this square pipe.

Furthermore, one side of the sucker base, which is far away from the negative pressure energy storage cavity, is also provided with a plurality of thread fixing holes.

The utility model has the following beneficial effects:

1) due to the polygonal structure of the closed ring groove, the mounting root part of the sealing strip can be firmly clamped in the groove, the risk that the sealing strip falls off when the vacuum chuck works is avoided, and the working pressure of the vacuum chuck can be ensured, so that the vacuum chuck can adsorb rough surfaces, non-smooth surfaces, surfaces with radian and the like;

2) the arrangement of the cushion block made of the flexible material can increase the friction force for the vacuum chuck on one hand, and can bear the negative pressure adsorption force at the position of the negative pressure energy storage cavity on the other hand, so that the adsorption capacity and the safety coefficient of the vacuum chuck are improved;

3) the arrangement of the air passing groove on the cushion block made of the flexible material can enable all parts of the negative pressure energy storage cavity separated by the cushion block to be communicated with each other, so that the adsorption capacity of the vacuum chuck is improved;

4) the arrangement of the negative pressure energy storage cavity can play a role in negative pressure energy storage, so that the adsorption force of the vacuum sucker is ensured;

5) the strength and the service life of the vacuum chuck are further ensured by the iron base or the aluminum alloy base or the carbon steel base.

These and other aspects of the utility model are apparent from and will be elucidated with reference to the embodiments described hereinafter.

Drawings

The structure and further objects and advantages of the present invention will be better understood by the following description taken in conjunction with the accompanying drawings, in which like reference characters identify like elements, and in which:

FIG. 1 is a schematic perspective view of a vacuum chuck according to a first embodiment of the present invention;

FIG. 2 is a plan view of the vacuum chuck of FIG. 1;

FIG. 3 is a schematic perspective view of the vacuum chuck of FIG. 1 after both ends have been cut away;

FIG. 4 is a cross-sectional view taken along line A-A of the vacuum chuck of FIG. 2;

FIG. 5 is an enlarged view of portion B of the vacuum chuck of FIG. 4;

FIG. 6 is a view of the vacuum chuck of FIG. 4 after removal of the sealing strip;

FIG. 7 is a view of the vacuum chuck of FIG. 6 with the sealing strip removed from portion C;

FIGS. 8 to 18 are schematic cross-sectional views of other modified structures of the sealing strip of the vacuum chuck shown in FIG. 1;

FIG. 19 is a schematic perspective view of a vacuum chuck according to a second embodiment of the present invention;

FIG. 20 is a plan view of the vacuum chuck of FIG. 19;

FIG. 21 is a perspective view of the vacuum chuck of FIG. 19 after both ends have been cut away;

FIG. 22 is a cross-sectional view taken along line E-E of the vacuum chuck of FIG. 20;

FIG. 23 is an enlarged view of portion F of the vacuum chuck of FIG. 22;

FIG. 24 is the view of FIG. 22 after the vacuum chuck has removed the sealing strip;

FIG. 25 is a view of the vacuum chuck of FIG. 23 with the sealing strip removed in section G;

fig. 26 is a rear perspective view of the vacuum chuck of fig. 19.

Detailed Description

Embodiments of the present invention will be described below with reference to the accompanying drawings.

In this document, the directions used to explain the structure and/or actions of the various parts of the disclosed embodiments, such as "top", "bottom", etc., are not absolute, but relative. These representations are suitable when the various parts of the disclosed embodiments are located in the positions shown in the figures, and if the position or frame of reference of the disclosed embodiments is changed, they are also changed according to the change in the position or frame of reference of the disclosed embodiments.

As shown in fig. 1 to 7, a vacuum chuck 100 according to an embodiment of the present invention includes a chuck base 1, a sealing bar 3, and a pad 5. The suction cup base 1 is provided with a closed loop groove 10 which extends into a polygon along the whole peripheral edge and an air passing hole 11 which is used for communicating an external negative pressure machine (not shown in the figure, in particular for communicating a negative pressure pipe of the external negative pressure machine); the weather strip 3 includes a mounting root portion 30 to be snapped into the closed-loop groove 10 and a sealing head portion 32 exposed to the outside of the closed-loop groove 10 (see fig. 4); the suction cup base 1 and the sealing strip 3 jointly enclose a negative pressure energy storage cavity 13, the cushion block 5 is mounted on the suction cup base 1 in the negative pressure energy storage cavity 13, the height of the cushion block 5 is set to be higher than the closed loop groove 10 and lower than the sealing head 32 in a non-working state (as clearly shown in fig. 4), and the cushion block 5 is provided with a gas passing groove 53 communicated with the negative pressure energy storage cavity 13.

As best shown in fig. 1 and 2, in the present embodiment, two spacers 5 are mounted on the suction cup base 1, each spacer 5 has an air passing groove 53, and the air passing grooves 53 of the two spacers 5 are aligned. The cushion block 5 is made of flexible materials and can be a polyurethane cushion block, a silica gel cushion block, a rubber cushion block, a soft nylon cushion block and the like. As shown in fig. 3 to 7, in the present embodiment, the suction cup base 1 is an iron base, which is fabricated by welding a square tube 102 and a metal plate 112 together and then performing CNC (computer numerical control) machining, in which a closed loop groove 10 is formed by opening the square tube 102. Of course, in other embodiments, the suction cup base 1 may also be an aluminum base of an aluminum alloy base, or a steel base of a carbon steel base, or a base of a carbon steel rubber composite material, etc. As shown in fig. 6 and 7, the cross-section of the closed-loop groove 10 is configured to be small at the top and large at the bottom so that the sealing tape 3 can be firmly clamped therein.

In the present embodiment, the sealing strip 3 is a rubber sealing strip or a silicone rubber sealing strip. Of course, in other embodiments, other flexible sealing materials may be used. As shown in fig. 4 and 5, in the present embodiment, the sealing strip 3 has a rectangular cross section, i.e. the mounting root portion 30 and the sealing head portion 32 have a completely identical cross section, and when the mounting root portion 30 is snapped into the closed-loop groove 10, the mounting root portion 30 can be in interference fit with the closed-loop groove 10. Of course, in other embodiments, the cross-section of the weather strip 3 may have other vertically symmetrical cross-sectional configurations, such as an oval cross-section as shown in fig. 8, or a configuration in which both the mounting root portion 30 and the seal head portion 32 are of a dihedral shape as shown in fig. 9. The weather strip 3 may also have a sectional structure which is small in the upper part and large in the lower part, for example, the cross section of the mounting root portion 30 is a large rectangular structure and the cross section of the seal head portion 32 is a small rectangular structure as shown in fig. 10, or the cross section of the mounting root portion 30 is a large rectangular structure and the cross section of the seal head portion 32 is an arc-shaped structure as shown in fig. 11, or the cross section of the mounting root portion 30 is a large rectangular structure and the cross section of the seal head portion 32 is a unicorn structure as shown in fig. 12 and 13; alternatively, the mounting root 30 may have a semicircular cross section and the seal head 32 may have a unicorn cross section as shown in fig. 14 and 15, the mounting root 30 may have a polygonal cross section and the seal head 32 may have a rectangular cross section as shown in fig. 16, or the mounting root 30 may have a polygonal cross section and the seal head 32 may have a unicorn cross section as shown in fig. 17 and 18. Of course, the cross-sectional structure of the sealing tape 3 is not limited to the above-mentioned forms, and the vacuum chuck 100 can select the sealing tape 3 with different cross-section or material according to the working environment.

Although one air hole 11 is provided in the suction cup base 1 in the present embodiment, a plurality of air holes 11 may be provided in another embodiment.

As shown in fig. 1 and 2, in the present embodiment, the suction cup base 1 is formed in a substantially rectangular parallelepiped structure with four corners bent, and the closed-loop groove 10 is herein referred to as a polygon surrounded by an octagonal shape with unequal sides in the present embodiment.

The operation of the present invention is described below with reference to fig. 1 to 7:

firstly, a negative pressure pipe of an external negative pressure machine is communicated with the air passing hole 11 on the sucker base 1 at one side of the top of the vacuum sucker 100 (namely, the side departing from the negative pressure energy storage cavity 13), then one side of the bottom of the vacuum sucker 100 (namely, the side provided with the sealing strip 3 and the cushion block 5) is contacted with the surface of a workpiece, and then the external negative pressure machine is started to vacuumize the negative pressure energy storage cavity 13, so that the vacuum sucker 100 tightly adsorbs the surface of the workpiece.

Fig. 19 to 26 show a vacuum chuck 100 according to a second embodiment of the present invention. In this second embodiment, the suction cup base 1 of the vacuum suction cup 100 is an aluminum alloy base, that is, the suction cup base 1 is formed by CNC processing using whole aluminum alloy, while the closed-loop groove 10 on the suction cup base 1 is directly formed in the aluminum alloy CNC processing process, and the negative pressure energy storage cavity 13 is also directly formed in the aluminum alloy CNC processing process, see fig. 19 and fig. 20.

Fig. 26 shows a rear perspective view of the vacuum chuck 100 of the second embodiment, in which a plurality of threaded fastening holes 14 are also provided on the side of the chuck base 1 facing away from the vacuum accumulator chamber 13, for fastening the chuck base 1 to a chuck arm of a further substrate, for example a blade web positioning tool. Note that, although not shown in the drawings, the vacuum chuck 100 according to the first embodiment shown in fig. 1 to 8 is also provided with a plurality of screw fixing holes.

While the utility model has been described with respect to the foregoing technical disclosure and features, it will be understood that various changes and modifications in the above structure, including combinations of features disclosed herein either individually or as claimed, and obviously including other combinations of such features, may be resorted to by those skilled in the art, without departing from the spirit of the utility model. Such variations and/or combinations are within the skill of the art to which the utility model pertains and are within the scope of the following claims.

Claims (10)

1. A vacuum sucker is characterized by comprising a sucker base, a cushion block and a sealing strip, wherein the sucker base is provided with a closed ring groove which extends into a polygon along the whole peripheral edge and a gas passing hole which is used for communicating an external negative pressure machine; the sealing strip comprises a mounting root part clamped in the closed-loop groove and a sealing head part exposed outside the closed-loop groove; the sucking disc base and the sealing strip enclose a negative pressure energy storage cavity together, the cushion block is installed on the sucking disc base in the negative pressure energy storage cavity, the height of the cushion block is set to be higher than the closed ring groove and lower than the sealing head in a non-working state, and the cushion block is provided with a gas passing groove communicated with the negative pressure energy storage cavity.

2. The vacuum chuck according to claim 1 wherein said chuck base has two of said blocks mounted thereon, said air-passing grooves of said two blocks being aligned.

3. The vacuum chuck of claim 2 wherein said pad is constructed as a flexible pad.

4. The vacuum chuck as claimed in any one of claims 1 to 3, wherein said annular groove has a cross section of a configuration having a smaller top and a larger bottom.

5. The vacuum chuck according to any of claims 1 to 3, wherein the air passing hole is one or more.

6. The vacuum chuck according to any of claims 1 to 3, wherein the sealing strip is a rubber sealing strip or a silicone rubber sealing strip.

7. The vacuum chuck as claimed in claim 6, wherein the sealing strip has a cross-sectional structure which is symmetrical up and down or a cross-sectional structure which is small up and large down.

8. A vacuum chuck according to any of claims 1 to 3, wherein said chuck base is a ferrous base or an aluminum alloy base or a carbon steel base.

9. The vacuum chuck of claim 8 wherein said ferrous base comprises a square tube and a sheet metal welded together, and wherein said closed-loop groove is formed by opening said square tube.

10. The vacuum chuck according to any of claims 1 to 3, wherein a plurality of threaded fixing holes are further provided on a side of the chuck base facing away from the negative pressure energy storage chamber.

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