Vacuum pressure maintaining mechanism

Abstract

The utility model belongs to the field of vacuum pressure maintaining, and provides a vacuum pressure maintaining mechanism which comprises a bottom plate, a vertical frame and a slidable lower cavity are respectively arranged on the bottom plate, a carrier plate is arranged in the lower cavity, a liftable upper cavity is arranged on the vertical frame, a press-fit air cylinder is upwards arranged at the top of the upper cavity, and a press-fit air cylinder is arranged at the top of the press-fit air cylinder. A driving shaft of the press-fit air cylinder is provided with a connecting frame through a threaded connecting piece. When the vacuum pressure maintaining mechanism is used for pressing the screen assembly, firstly, the lower cavity where the screen assembly is placed slides to a vacuum pressure maintaining position, the upper cavity moves towards the lower cavity till the upper cavity is tightly attached to the lower cavity, the pressing air cylinder drives the connecting frame to move downwards, the pressing plate presses the screen assembly, the pressing plate presses the screen assembly downwards, and pressure maintaining is conducted; and meanwhile, the vacuum machine starts to work, all parts in the screen assembly are mutually extruded and tightly attached together under the action of the pressing plate, and bubbles in the screen assembly are adsorbed out under the negative pressure of the vacuum machine.

Description

Technical Field

[0001] The utility model belongs to the field of vacuum pressure maintenance, and in particular relates to a vacuum pressure maintenance mechanism. Background Art

[0002] During the production and processing of the screen, the various parts of the screen assembly need to be completely glued together through the bonding process. Then the glued screen assembly is pressed by a vacuum pressure-maintaining mechanism to ensure that the various parts of the screen assembly are tightly fitted. During the bonding process, the bubbles between the various parts of the screen assembly can also be squeezed out, further improving the quality of the screen assembly.

[0003] When the screen assembly is pressed together using a vacuum pressure-maintaining mechanism, the screen assembly is first placed on the lower cavity, and then the upper cavity is driven to move toward the screen assembly until the pressing is completed. However, the existing vacuum pressure-maintaining mechanism cannot fine-tune the pressing distance of the screen assembly, resulting in each vacuum pressure-maintaining mechanism being able to only press screen assemblies of the same thickness, and having low adaptability. Utility Model Content

[0004] In view of the above problems, the purpose of the present utility model is to provide a vacuum pressure maintaining mechanism.

[0005] The utility model adopts the following technical solutions:

[0006] The vacuum pressure maintaining mechanism includes a bottom plate, on which a vertical frame and a slidable lower cavity are respectively provided, a carrier plate is provided in the lower cavity, a liftable upper cavity is provided on the vertical frame, a pressing cylinder is provided on the top of the upper cavity facing upwards, a connecting frame is provided on the driving shaft of the pressing cylinder through a threaded connecting piece, four pillars of the connecting frame are all sealed and penetrated into the upper cavity and are jointly provided with a pressing plate, a vacuum joint is provided on the upper cavity, a scale disk is provided on the top surface of the connecting frame, and corresponding mounting notches are provided on the top surface of the connecting frame and the scale disk, and after the threaded connecting piece is inserted into the mounting notch, the bottom of the threaded connecting piece is screwed into and installed on the driving shaft of the pressing cylinder.

[0007] Furthermore, the threaded connector includes a union sleeve with an inner circle thread on the inner wall, and a pair of union nuts are integrally formed at both ends of the union sleeve.

[0008] Furthermore, a threaded section is formed at the end of the driving shaft of the pressing cylinder.

[0009] Furthermore, a pair of slide rails are provided on the base plate, the lower cavity is installed on the slide rails, a straight cylinder is provided on the base plate, and a driving shaft of the straight cylinder is connected to the lower cavity through a connecting block.

[0010] Furthermore, stop rods are provided inwardly at the front and rear positions of one of the slide rails.

[0011] Furthermore, a lifting cylinder is provided on the top of the stand, and a fixing frame is provided on the driving shaft of the lifting cylinder. The bottom of the fixing frame passes through the connecting frame and is connected to the top of the upper cavity.

[0012] Furthermore, a sealing groove is formed on the top edge of the lower cavity along the circumference direction, and a matching sealing ring is provided in the sealing groove.

[0013] Furthermore, a pair of viewing windows are provided on the side walls of the upper cavity.

[0014] The beneficial effect of the utility model is that when the vacuum pressure-maintaining mechanism is used to press the screen assembly, the lower cavity where the screen assembly is placed slides to the vacuum pressure-maintaining position, and the upper cavity moves toward the lower cavity until the upper cavity and the lower cavity are tightly fitted, and the pressing cylinder drives the connecting frame to move downward, and the pressing plate presses toward the screen assembly, and the pressing plate presses the screen assembly down and maintains the pressure, and at the same time the vacuum machine starts to work, and under the action of the pressing plate, the various components in the screen assembly are squeezed against each other and tightly fitted together, and at the same time, under the negative pressure of the vacuum machine, the bubbles in the screen assembly are adsorbed, further improving the quality of the screen assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The utility model provides an overall diagram of a vacuum pressure maintaining mechanism.

[0016] Figure 2 It is a cross-sectional view of the vacuum pressure maintaining mechanism provided by the utility model.

[0017] Figure 3 The utility model provides a schematic diagram of the installation of a threaded connector.

[0018] Figure 4 The utility model provides a schematic diagram of the structure of a threaded connector. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0020] In order to illustrate the technical solution of the present invention, specific embodiments are provided below for illustration.

[0021] For the convenience of explanation, only the parts related to the embodiment of the present utility model are shown.

[0022] Combination Figure 1-4As shown, the vacuum pressure-maintaining mechanism comprises a bottom plate 1, on which a stand 2 and a slidable lower cavity 3 are respectively provided, a carrier plate 4 is provided in the lower cavity 3, and a liftable upper cavity 5 is provided on the stand 1, and a pressing cylinder 6 is provided on the top of the upper cavity 5, and the driving shaft of the pressing cylinder 6 is provided with a connecting frame 8 through a threaded connector 7, and the four pillars of the connecting frame 8 are all sealed and penetrated into the upper cavity 5 and are jointly provided with a pressing plate 9, and a vacuum joint 10 is provided on the upper cavity 5, and a scale disk 11 is provided on the top surface of the connecting frame 8, and the top surface of the connecting frame 8 and the scale disk 11 are jointly provided with a mounting notch 12 at a corresponding position, and after the threaded connector 7 is inserted into the mounting notch 12, the bottom of the threaded connector 7 is screwed into and installed on the driving shaft of the pressing cylinder 6. The vacuum joint is connected to the vacuum machine through a hose. A threaded section is formed at the end of the driving shaft of the pressing cylinder.

[0023] During the production and processing of the screen, the screen components that have been glued together can be pressed by the vacuum pressure-maintaining mechanism to ensure that the various components of the screen components are tightly fitted, thereby improving the quality of the screen components.

[0024] In this structure, the lower cavity can slide on the bottom plate. When the vacuum pressure-maintaining mechanism is used to press the screen assembly, the lower cavity is first located at the loading position. At this time, the screen assembly is placed on the carrier plate in the lower cavity as required, and the lower cavity slides to the vacuum pressure-maintaining position. At this time, the upper cavity is located directly above the lower cavity, and the upper cavity moves toward the lower cavity until the upper cavity and the lower cavity are tightly fitted. The pressing cylinder drives the connecting frame to move downward, and the pressing plate presses against the screen assembly. When the pressing cylinder is driven into place, the pressing plate presses the screen assembly down and maintains pressure. At the same time, the vacuum machine starts working, and the area formed by the upper cavity and the lower cavity is close to a vacuum state. In this way, under the action of the pressing plate, the various components in the screen assembly are squeezed against each other and tightly fitted together. At the same time, under the negative pressure of the vacuum machine, the bubbles in the screen assembly are adsorbed, further improving the quality of the screen assembly.

[0025] When the screen assembly completes the pressure holding, the vacuum machine stops working, the upper cavity is reset, and the lower cavity moves to the loading position. The screen assembly is removed, and the next screen assembly is prepared to be placed on the carrier for pressure holding.

[0026] In the vacuum pressure-maintaining mechanism, the downward pressing distance of the pressing plate can be fine-tuned according to the thickness of the screen assembly, so as to adapt to the pressure-maintaining treatment of screen assemblies of different thicknesses.

[0027] And as Figure 3-4The threaded connector 7 includes a union sleeve 71 with an inner thread on the inner wall, and a pair of union nuts 72 are integrally formed at both ends of the union sleeve 71. The pear-shaped installation slot includes a flared opening and a small opening, and the threaded connector is placed into the flared opening of the pear-shaped installation slot, and then pushed into the small opening, and then the threaded connector is screwed, and the inner thread at the bottom of the threaded connector is screwed into the drive shaft of the press-fit cylinder. The flared opening plays a role of avoidance, making it easy to put the threaded connector into the small opening of the pear-shaped installation slot, and plays a role of limiting.

[0028] When you want to fine-tune the downward pressing distance of the pressure plate, turn the threaded connector at this time. During the turning process, the threaded connector moves slightly on the driving shaft of the pressing cylinder, and the connecting frame moves synchronously, so as to fine-tune the installation position of the pressure plate.

[0029] In the process of twisting the threaded connector, any corner of the top union nut on the threaded connector can be designated as a reference. When the threaded connector rotates, the designated corner rotates, and the installation position of the pressure plate can be accurately fine-tuned with the help of the graduated disc. A pointer can also be set on the top union nut, and the installation position of the pressure plate can also be accurately adjusted by pointing the pointer to the graduated disc.

[0030] And as Figure 1 A pair of slide rails 13 are provided on the base plate 1 , and the lower cavity 3 is installed on the slide rails 13 . A straight cylinder 14 is provided on the base plate 1 , and a driving shaft of the straight cylinder 14 is connected to the lower cavity 3 through a connecting block 15 .

[0031] The lower cavity moves under the driving action of the straight cylinder. A stopper 20 is provided inwardly at the front and rear positions of one of the slide rails. In this embodiment, when the straight cylinder drives the lower cavity to move forward, the lower cavity contacts the front stopper, and the lower cavity moves to the loading position. Similarly, when the lower cavity contacts the rear stopper, the lower cavity moves to the vacuum pressure holding position. This makes it easier for the lower cavity to move accurately to the corresponding work position.

[0032] Combined with 1-2, the top of the stand 2 is provided with a lifting cylinder 16, the driving shaft of the lifting cylinder 16 is provided with a fixing frame 17, the bottom of the fixing frame 17 passes through the connecting frame 8 and is connected to the top of the upper cavity 5. The top edge of the lower cavity 3 is provided with a sealing groove along the circumference direction, and a matching sealing ring 18 is provided in the sealing groove.

[0033] In this vacuum pressure-maintaining mechanism, the upper cavity is moved up and down by a lifting cylinder. When the upper cavity moves to the lower cavity, the lower cavity supports the upper cavity. The pressure plate presses down the screen assembly, and the vacuum machine starts working. Under the action of the sealing ring, leakage can be prevented at the contact position between the upper cavity and the lower cavity. The sealing between the upper cavity and the lower cavity is improved.

[0034] In addition, a pair of viewing windows 19 are provided on the side wall of the upper cavity 5. During the process of pressurizing the screen assembly, the pressurizing process of the screen assembly can be observed through the viewing windows.

[0035] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the utility model should be included in the protection scope of the present utility model.

Claims

1. A vacuum pressure-maintaining mechanism, characterized in that: The vacuum pressure maintaining mechanism includes a bottom plate, on which a vertical frame and a slidable lower cavity are respectively provided, a carrier plate is provided in the lower cavity, a liftable upper cavity is provided on the vertical frame, a pressing cylinder is provided on the top of the upper cavity facing upwards, a connecting frame is provided on the driving shaft of the pressing cylinder through a threaded connecting piece, four pillars of the connecting frame are all sealed and penetrated into the upper cavity and are jointly provided with a pressing plate, a vacuum joint is provided on the upper cavity, a scale disk is provided on the top surface of the connecting frame, and corresponding mounting notches are provided on the top surface of the connecting frame and the scale disk, and after the threaded connecting piece is inserted into the mounting notch, the bottom of the threaded connecting piece is screwed into and installed on the driving shaft of the pressing cylinder.

2. A vacuum pressure maintaining mechanism as claimed in claim 1, characterized in that: A threaded section is formed at the end of the driving shaft of the pressing cylinder.

3. A vacuum pressure maintaining mechanism as claimed in claim 2, characterized in that: The threaded connector comprises a loose joint sleeve with an inner circle thread on the inner wall, and a pair of loose joint nuts are integrally formed at both ends of the loose joint sleeve.

4. A vacuum pressure maintaining mechanism as claimed in claim 3, characterized in that: A pair of slide rails are arranged on the bottom plate, the lower cavity is mounted on the slide rails, a straight cylinder is arranged on the bottom plate, and a driving shaft of the straight cylinder is connected with the lower cavity through a connecting block.

5. A vacuum pressure maintaining mechanism as claimed in claim 4, characterized in that: Stop bars are arranged inwardly at the front and rear positions of one of the slide rails.

6. A vacuum pressure maintaining mechanism as claimed in claim 5, characterized in that: A lifting cylinder is arranged on the top of the stand, a fixing frame is arranged on the driving shaft of the lifting cylinder, and the bottom of the fixing frame passes through the connecting frame and is connected to the top of the upper cavity.

7. A vacuum pressure maintaining mechanism as claimed in claim 6, characterized in that: A sealing groove is formed on the top edge of the lower cavity along the circumference direction, and a matching sealing ring is arranged in the sealing groove.

8. A vacuum pressure maintaining mechanism as claimed in claim 7, characterized in that: A pair of viewing windows are formed on the side walls of the upper cavity.

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