Electric vacuum chuck

Abstract

The utility model discloses an electric vacuum chuck which comprises an integrally formed metal chuck shell (1), the upper end of the chuck shell (1) is provided with an annular boss (3) used for being connected with an external air extractor, the edge of the chuck shell (1) is provided with a flange (6) formed by being folded downwards, and the flange (6) is provided with a sealing rubber ring (2). The device has the advantages of being simple in structure, low in manufacturing cost, convenient to use and maintain and capable of being normally used after being repaired.

Description

Technical Field

[0001] The utility model relates to a vacuum chuck, in particular to an electric vacuum chuck. Background Art

[0002] A vacuum chuck device is a handling and hanging tool that adsorbs on an object by utilizing the difference between internal and external atmospheric pressures. There are mainly two types of existing vacuum chucks. The first type of vacuum chuck is manually operated, that is, manual air extraction is required to generate vacuum negative pressure to adsorb the workpiece. The second type of vacuum chuck is electrically operated, that is, a vacuum pump is used to extract air to generate vacuum negative pressure to adsorb the workpiece. Both methods achieve the tight connection between the vacuum chuck and the object by extracting air from the inside of the chuck body, so that the air pressure inside the chuck body is less than the external air pressure, thereby achieving the purpose of people using the vacuum chuck to handle workpieces or hang objects.

[0003] Electric vacuum chucks are usually of two types. One is a fixed-body electric vacuum chuck, in which the chuck body and the sealing rubber ring are integrated. Once the sealing rubber ring is damaged and loses its sealing function, or the chuck body is damaged and deformed, and it is difficult to achieve the sealing effect, the chuck can only be scrapped. The other is an assembled type of vacuum chuck body and sealing rubber ring. The chuck body and the sealing rubber ring of the chuck are separated, and the sealing rubber ring is sleeved on the chuck body. Such an assembled structure is an improvement compared to the fixed chuck body. However, the material used for the sealing rubber ring is still not small, and when the chuck body of the vacuum chuck is damaged and deformed, it generally can only be scrapped because there is no appropriate inspection and repair method. The working environment of vacuum chuck tools is relatively poor, and there are also non-standard usage behaviors. Therefore, the probability of damage to the chuck body is relatively high, and the damaged chuck body generally can only be discarded, which also causes relatively much waste of social resources. Content of the Utility Model

[0004] The purpose of the utility model is to provide an electric vacuum chuck, which has the advantages of simple structure, low manufacturing cost, convenient use, easy maintenance, and can be used normally after repair.

[0005] The technical solution of the utility model: An electric vacuum chuck includes a metal chuck shell formed integrally. An annular boss for connecting an external air extraction device is provided at the upper end of the chuck shell. A retaining edge is formed by folding down the edge of the chuck shell, and a sealing rubber ring is provided on the retaining edge.

[0006] In the aforementioned electric vacuum chuck, when the external air extraction device extracts air, the middle part of the chuck shell can be deformed downward under the external air pressure, and a reinforcing rib is provided in the middle part of the chuck shell.

[0007] In the aforementioned electric vacuum chuck, the reinforcing rib is a reinforcing rib with horizontal and vertical intersections.

[0008] In the aforementioned electric vacuum sucker, the annular boss includes an installation part for installing an external air extraction device, and connecting parts inclined downward are arranged on both sides of the installation part.

[0009] In the aforementioned electric vacuum sucker, an elastic ring for fixing the sealing rubber ring is arranged inside the sealing rubber ring, stepped grooves corresponding to the retaining edge and the elastic ring are arranged on both sides of the upper end of the sealing rubber ring, and one group or multiple groups of downwardly arranged taper tips are arranged on the lower side of the sealing rubber ring.

[0010] In the aforementioned electric vacuum sucker, the elastic ring is a circular elastic ring, and multiple groups of pull rings squeezed towards the center of the elastic ring are arranged in the middle of the elastic ring in the height direction.

[0011] In the aforementioned electric vacuum sucker, an annular clamping groove corresponding to the retaining edge is arranged at the upper end of the sealing rubber ring.

[0012] Compared with the prior art, the utility model has the following advantages:

[0013] 1. This application uses a sucker housing with a smaller thickness and integrally formed, combined with a sealing ring that uses less material and can be conveniently replaced, to manufacture an electric vacuum sucker with low cost, which can save the materials required for social resources, and is simple in processing, saving the manufacturing cost and the usage cost of users;

[0014] 2. The combination of the sealing rubber ring and the retaining edge in this application is relatively simple, and different required sealing rings can be quickly replaced to meet the needs of different usage environments. For example, the quick replacement of different sealing rings for mirror working environments and rough working environments can meet the needs of two completely different working environments, thereby improving the applicability, meeting the needs of different jobs, reducing the tool investment of users, and facilitating the carrying of tools;

[0015] 3. By selecting thin materials, setting the annular boss and the retaining edge, while ensuring sufficient strength and stiffness of the sucker housing, a large area in the middle of the sucker housing is designed as a deformable area, and the required deformation amount for deformation. And because the wall thickness of the sucker housing is small, when an external air extraction device extracts air from the inside of the sucker housing, the deformable area in the middle of the sucker housing will sink downward under atmospheric pressure, which will effectively reduce the sucker space and improve the vacuum degree during the operation of the sucker. In this way, the force required for sucker suction can be reduced. After deflation, the sucker housing will automatically rebound and generate an impact, enabling the sealing rubber ring to quickly separate from the sucked object, making it more convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of Embodiment 1 of the utility model;

[0017] Figure 2 is a schematic structural diagram of Embodiment 1 of the utility model;

[0018] Figure 3 It is a schematic structural diagram of Embodiment 2 of the present utility model;

[0019] Figure 4 It is a schematic structural diagram during the maintenance of the present utility model.

[0020] The reference numerals in the drawings are: 1 - suction cup shell, 2 - sealing rubber ring, 3 - annular boss, 4 - reinforcing rib, 6 - flange, 7 - elastic ring, 8 - stepped groove, 9 - tapered tip, 10 - pull ring, 11 - annular clamping groove, 13 - connecting part, 14 - mounting part. Specific Embodiments

[0021] The present utility model will be further described below in conjunction with the drawings and embodiments, but it shall not be used as a basis for limiting the present utility model.

[0022] Embodiment 1. An electric vacuum suction cup is configured as Figure 1-2 shown, including a suction cup shell 1 made of integrally formed metal. An annular boss 3 for connecting an external air extraction device is provided at the upper end of the suction cup shell 1. A flange 6 formed by folding downward is provided at the edge of the suction cup shell 1. A sealing rubber ring 2 is provided on the flange 6. The specific thickness of the suction cup shell 1 can be selected as a suction cup shell with a thickness of less than 2 mm. The material of the suction cup shell 1 can be made of stamping materials such as stainless steel, carbon steel, and some non-ferrous metals. Compared with general suction cups using alloy castings, its cost is lower, and the materials required for preparing the suction cup shell 1 are less and can be repaired, which can further save costs.

[0023] When the external air extraction device extracts air, the middle part of the suction cup shell 1 can deform downward under the external air pressure. A reinforcing rib 4 is provided in the middle part of the suction cup shell 1.

[0024] The reinforcing rib 4 is a reinforcing rib with a horizontal and vertical intersection.

[0025] The annular boss 3 includes a mounting part 14 for mounting an external air extraction device, and connecting parts 13 inclined downward are provided on both sides of the mounting part 14.

[0026] An elastic ring 7 for fixing the sealing rubber ring 2 is provided inside the sealing rubber ring 2. Stepped grooves 8 corresponding to the flange 6 and the elastic ring 7 are provided on both sides of the upper end of the sealing rubber ring 2. One group or more groups of downwardly provided tapered tips 9 are provided on the lower side of the sealing rubber ring 2.

[0027] The elastic ring 7 is a circular elastic ring, and multiple groups of pull rings 10 pressed towards the center of the elastic ring 7 are provided in the middle of the elastic ring 7 in the height direction.

[0028] The working principle of this embodiment is as follows. In this embodiment, the sealing rubber ring 2 is fixed by the elastic ring 7. In the middle of the elastic ring 7 in the height direction, there are multiple groups of pull rings 10 formed by squeezing towards the center of the elastic ring 7. The number of pull rings 10 can be 3 groups. The three-jaw tool passes through the three pull rings 10 at the same time and contracts inward, so that the elastic ring 7 deforms, and the elastic ring 7 can be removed to release the fixation of the sealing rubber ring. After replacing the sealing rubber ring, the elastic ring 7 is in the inward deformed state when it is removed by the three-jaw tool. After placing the elastic ring 7 inside the sealing rubber ring 2, the tool is removed, and the elastic ring will return to the circular ring shape, thereby fixing the sealing rubber ring 2. The elastic ring 7 is made of elastic metal or alloy. The elastic ring 7 is made of elastic metal, and the pull rings 10 are at the trisection positions of the elastic ring 7. First, three groups of pull rings 10 are formed by stamping on the elastic metal strip. When stamping, the die will cut the upper and lower parts of the pull rings 10 of the elastic ring and push the positions of the pull rings 10 downward, so that 3 groups of pull rings 10 can be formed. Then, the two ends of the elastic metal strip are connected by welding or other connection methods to form an elastic ring 7 with 3 groups of pull rings 10, which is convenient for external tools to deform the elastic ring 7 through the pull rings 10. During use, the suction pipe of the external air extraction device is connected to the air extraction hole on the mounting plate 12. Since the thickness of this application is small, during the air extraction process, the middle part of the suction cup shell 1 will sink downward. This application is provided with an annular boss 3 to provide a deformation amount through the annular boss 3, so as to avoid the situation that the edge 6 cannot be kept perpendicular to the workpiece being sucked during deformation and reduce potential safety hazards. When deflating after the suction is completed, the suction cup shell 1 will return to its original state, thereby generating a certain impact, which can quickly separate the sealing rubber ring 2 from the workpiece being sucked and is more convenient to use. During the use process, since the suction cup shell 1 is relatively thin, it may be damaged during use. Although the cost of this application is relatively low, in order to further save costs, the company has further developed an inspection and maintenance method for an electric vacuum suction cup. During maintenance, first remove the sealing rubber ring 2, then select a flat ceramic tile and place a light source in the middle of the ceramic tile. Then cover the suction cup shell 1 on the light source and detect the light at the junction of the suction cup shell 1 and the ceramic tile through the naked eye or a light detection device. Usually, the light leakage amount at the edge of the suction cup shell 1 is uniform. If the light leakage is uneven, it proves that the edge 6 of the suction cup shell 1 has deformed. Then as Figure 4Perform maintenance on the suction cup housing 1 as shown. At this time, U-shaped feet are set at both ends of the uneven light leakage area and at the position opposite to the widest light leakage area to raise the suction cup housing 1. The U-shaped feet at the position opposite to the widest light leakage area in the figure are blocked by the suction cup housing and not shown in the figure. Then, use a C-shaped locking clip to clamp the position opposite to the widest light leakage area and the ceramic tile to prevent the position opposite to the widest light leakage area from warping during subsequent maintenance of the deformed area. Finally, use a C-shaped locking clip to clamp the widest light leakage area of the suction cup housing and the ceramic tile together, so that the widest light leakage area of the suction cup housing fits the ceramic tile. The reason for setting the U-shaped feet is to allow the deformed area of the edge 6 to drop a distance greater than the deformation amount, in order to achieve the effect of overcorrection, so that the lower end surface of the edge 6 will be flat after springback. After a period of correction time, remove the C-shaped locking clip and the U-shaped feet, and repeat the process of S1 to achieve the maintenance of the suction cup housing 1.

[0029] Embodiment 2. On the basis of Embodiment 1, an annular groove 11 corresponding to the edge 6 is provided at the upper end of the sealing rubber ring 2. The sealing rubber ring 11 is connected to the edge 6 of the suction cup subject by a self-fastening method, and is connected to the suction cup housing 1 by a rubber elastic self-fastening method, with a simpler structure and lower cost.

[0030] The sealing rubber ring 2 of the present application is connected to the suction cup housing 1, but is not limited to such methods. It can be various physical connection methods, such as the setting of structures such as grooves, blocks, and fastener locking, or chemical connection methods can be used, such as bonding with various glues.

Claims

1. An electric vacuum suction cup, characterized in that: The invention comprises an integrally formed metal suction cup shell (1), wherein the upper end of the suction cup shell (1) is provided with an annular boss (3) for connecting to an external air extraction device, and the edge of the suction cup shell (1) is provided with a rib (6) folded downward, and a sealing rubber ring (2) is provided on the rib (6).

2. The electric vacuum suction cup according to claim 1, characterized in that: When the suction cup shell (1) is evacuated by an external vacuum device, the middle portion of the suction cup shell (1) can be deformed downward under external air pressure, and a reinforcing rib (4) is provided in the middle portion of the suction cup shell (1).

3. An electric vacuum suction cup according to claim 2, characterized in that: The reinforcing ribs (4) are reinforcing ribs that are staggered horizontally and vertically.

4. The electric vacuum suction cup according to claim 1, characterized in that: The annular boss (3) comprises a mounting portion (14) for mounting an external air extraction device, and connection portions (13) arranged in a downwardly inclined manner are provided on both sides of the mounting portion (14).

5. The electric vacuum suction cup according to claim 1, characterized in that: The sealing rubber ring (2) is provided with an elastic ring (7) for fixing the sealing rubber ring (2), the upper ends of the sealing rubber ring (2) are provided with stepped grooves (8) corresponding to the retaining edge (6) and the elastic ring (7), and the lower side of the sealing rubber ring (2) is provided with one or more groups of cone tips (9) arranged downwards.

6. The electric vacuum suction cup according to claim 5, characterized in that: The elastic ring (7) is an annular elastic ring, and a plurality of pull rings (10) are provided in the middle of the elastic ring (7) in the height direction and are extruded toward the center of the elastic ring (7).

7. The electric vacuum suction cup according to claim 1, characterized in that: The upper end of the sealing rubber ring (2) is provided with an annular groove (11) corresponding to the retaining edge (6).

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