Vacuum suction type plate fixing device

Abstract

The utility model discloses a vacuum adsorption type board fixing device relates to vacuum adsorption platform technical field, including adsorption platform and the vacuum cavity of being set up in the inside of adsorption platform, the utility model discloses a valve seat is installed in the inside of mounting hole, the inside slidingly connected with the valve core of valve seat, when processing board places on the top of this adsorption platform, contacts the valve core of board and moves to the inside of valve seat under the action of gravity, makes the air passage of valve seat open, after the negative pressure suction force acts on board, rubber pad firmly and board are pasted together, the valve core that has not contacted board keeps the original position and rubber pad closely pastes together under the action of supporting spring, whether it is the air passage of adsorbing board and the air passage that does not have adsorbing board all have good seal, avoid the valve core or spring in the inside of air passage to be influenced by cutting fluid and waste chip and cause the use to be influenced, guarantee the normality of adsorption platform adsorption work.

Description

Technical Field

[0001] This utility model relates to the field of vacuum adsorption table technology, specifically a vacuum adsorption type plate fixing device. Background Technology

[0002] A vacuum adsorption table is a device that uses the principle of vacuum negative pressure to fix workpieces. It is widely used in the processing and manufacturing of various sheet materials. Currently, traditional porous vacuum adsorption tables require spring valve cores inside their adsorption holes. Vacuum adsorption tables with spring valve cores rely on the gas pressure difference between the upper and lower sides of the sheet to achieve adsorption. The valve core is controlled by a valve cover. If there is no workpiece, the valve cover will be pressed against the sealing ring by atmospheric pressure, forming an air passage isolation and automatically closing the adsorption hole. If there is a workpiece covering it, atmospheric pressure cannot reach the valve cover, and the spring will spring the valve cover up, connecting the upper and lower sides of the sheet to form a gas pressure difference, and the workpiece will be adsorbed.

[0003] However, during the drilling and milling process, a very small amount of cutting fluid and debris will enter the adsorption hole and the valve core. These small debris particles can get stuck in the gap between the valve cover and the side wall, which can easily cause the valve cover to be unable to move freely up and down, resulting in malfunction. The debris and the viscous polymers in the cutting fluid can also easily adhere to the spring wire, which can also cause the spring force coefficient to change or even fail. This can easily cause the adsorption hole of the adsorption platform to fail or become blocked, resulting in a weakened adsorption force. If the debris is in powder form, these problems will be even more serious. Utility Model Content

[0004] The purpose of this invention is to provide a vacuum adsorption type plate fixing device to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: including an adsorption stage and a vacuum chamber opened inside the adsorption stage, wherein the top of the adsorption stage is provided with an installation hole communicating with the vacuum chamber; A valve seat is fitted inside the mounting hole, and a valve core is slidably connected inside the valve seat. One end of the valve core extends through to the outside of the valve seat. An air guide hole is opened on the surface of the valve seat. A first sealing ring that works with the valve core is fitted inside the valve seat. A support spring is provided between the valve core and the valve seat. A rubber pad is fitted on the top of the valve seat.

[0006] In a further embodiment, a second sealing ring is provided between the valve seat and the mounting hole.

[0007] In a further embodiment, the front of the adsorption stage is fitted with an external pipe that communicates with the vacuum chamber.

[0008] In a further embodiment, the bottom of the valve core is provided with symmetrical sliding blocks, and the inside of the valve seat is provided with sliding grooves that are slidably connected to the sliding blocks.

[0009] In a further embodiment, a retaining ring is fitted at the bottom of the valve core and inside the valve seat, and the retaining ring is used in conjunction with a support spring.

[0010] In a further embodiment, the rubber pad is slidably connected to the valve core.

[0011] Compared with the prior art, the beneficial effects of this utility model are: This invention features a valve seat installed inside the mounting hole, with a valve core slidably connected inside the valve seat. When the processing material is placed on the adsorption platform, the valve core in contact with the material moves inward under gravity, opening the air passage of the valve seat. Negative pressure suction acts on the material, causing the rubber pad to adhere firmly to the material. The valve core not in contact with the material remains in place and tightly adheres to the rubber pad under the support spring. Both the air passages for adsorbing the material and those not are well sealed, preventing the valve core or spring inside the air passage from being affected by cutting fluid and debris, thus ensuring the normal operation of the adsorption platform. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model; Figure 2 This is a cross-sectional view of the adsorption stage according to an embodiment of the present invention; Figure 3 This is a partial structural cross-sectional view of an embodiment of the present utility model; Figure 4 This is a top view of the adsorption stage according to an embodiment of the present invention.

[0013] In the diagram: 1. Adsorption stage; 2. Vacuum chamber; 3. Mounting hole; 4. Valve seat; 5. Valve core; 6. Air guide hole; 7. First sealing ring; 8. Support spring; 9. Rubber pad; 10. Second sealing ring; 11. External pipe; 12. Sliding block; 13. Sliding groove; 14. Locking ring. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] This embodiment discloses a vacuum adsorption type plate fixing device, including an adsorption platform 1 and a vacuum chamber 2 formed inside the adsorption platform 1. The top of the adsorption platform 1 has a mounting hole 3 communicating with the vacuum chamber 2, and the front of the adsorption platform 1 is fitted with an external pipe 11 communicating with the vacuum chamber 2. Figure 1 , Figure 2 and Figure 4 As shown in this application, the adsorption stage 1 is used to place the plate to be processed, the vacuum chamber 2 is opened inside the adsorption stage 1, the mounting hole 3 is opened on the top of the adsorption stage 1 and communicates with the vacuum chamber 2, the vacuum chamber 2 is used to provide negative pressure suction to all the mounting holes 3, the external pipe 11 is installed on the front of the adsorption stage 1 and communicates with the vacuum chamber 2, the external pipe 11 is used to install and connect with the external vacuum equipment, when the external vacuum equipment is started, the negative pressure is applied to the vacuum chamber 2, and the vacuum chamber 2 generates negative pressure.

[0016] Further inside the mounting hole 3, a valve seat 4 is fitted, and a valve core 5 is slidably connected inside the valve seat 4. One end of the valve core 5 extends to the outside of the valve seat 4. An air guide hole 6 is provided on the surface of the valve seat 4. A first sealing ring 7, which mates with the valve core 5, is fitted inside the valve seat 4. A support spring 8 is provided between the valve core 5 and the valve seat 4. A rubber pad 9 is fitted on the top of the valve seat 4. Figure 1 , Figure 2 and Figure 3As shown, valve seat 4 is installed inside mounting hole 3. Valve seat 4 is used to install valve core 5. A vent hole 6 communicating with the inner cavity of valve seat 4 is provided on valve seat 4. When negative pressure is generated inside vacuum chamber 2, the negative pressure can act on the top of valve seat 4 through vent hole 6 and the inner cavity of valve seat 4, causing negative pressure on the top of valve seat 4. Valve core 5 is installed in the inner cavity of valve seat 4. Valve seat 4 is cylindrical in shape with a conical upper end. Valve core 5 is slidably connected to the inner cavity of valve seat 4, with one end of valve core 5 extending to the outside of valve seat 4. When valve core 5 is in contact with the first sealing ring 7 inside valve seat 4, valve core 5 seals the inner cavity of valve seat 4, achieving the purpose of sealing the air passage of valve seat 4. Support spring 8 is designed inside valve seat 4, supporting valve core 5. When valve core 5 is not in contact with the plate, support spring 8 can support valve core 5 in its original position. The valve core 5 is fitted into the inner cavity of the valve seat 4. When the adsorption platform 1 places the plate, the valve core 5, which is in contact with the plate, overcomes the supporting force of the support spring 8 under the action of gravity, and compresses the valve core 5 into the valve seat 4. After the plate contacts the rubber pad 9, the valve core 5 stops retracting. After the valve core 5 retracts, there is a certain gap between the inner cavity of the valve seat 4 and the valve core 5. At this time, the air passage of the valve seat 4 is opened, and the negative pressure inside the vacuum chamber 2 can act on the top of the valve seat 4 through the air guide hole 6, so that a negative pressure is generated inside the rubber pad 9, which firmly adsorbs the plate onto the rubber pad 9. This can prevent external cutting fluid and waste from entering the interior of the valve seat 4 and prevent the adsorption hole of the adsorption platform 1 from failing or becoming blocked and weakening. In this application, the support spring 8 is a low-elasticity spring, and its supporting force is slightly greater than the weight of the valve core 5, and it cannot bear the weight of the external plate placed on the valve core 5.

[0017] Furthermore, a second sealing ring 10 is provided between the valve seat 4 and the mounting hole 3, and the rubber gasket 9 is slidably connected to the valve core 5, such as... Figure 3 As shown in this application, the second sealing ring 10 is installed between the valve seat 4 and the mounting hole 3, which can seal the gap between the valve seat 4 and the mounting hole 3, thereby improving the sealing performance between the valve seat 4 and the mounting hole 3. The shape of the central through hole of the rubber pad 9 is consistent with the top shape of the valve core 5. When the support spring 8 supports the valve core 5 to fit against the inner cavity of the valve seat 4, the top of the valve core 5 fits against the central cavity of the rubber pad 9, preventing external dust from entering the interior of the valve seat 4 through the gap between the rubber pad 9 and the valve core 5.

[0018] Preferably, the bottom of the valve core 5 is symmetrically provided with sliding blocks 12, and the inside of the valve seat 4 is provided with sliding grooves 13 that are slidably connected to the sliding blocks 12. Both the bottom of the valve core 5 and the inside of the valve seat 4 are equipped with retaining rings 14, which cooperate with the support spring 8. Figure 3As shown in this application, the sliding block 12 is installed at the bottom of the valve core 5, and the sliding groove 13 is opened in the inner cavity of the valve seat 4. The sliding block 12 and the sliding groove 13 are slidably connected. When the valve core 5 retracts into the valve seat 4, the valve core 5 can be slidably limited. Two locking rings 14 are respectively installed at the bottom of the valve core 5 and in the inner cavity of the valve seat 4 for limiting and fixing the support spring 8.

[0019] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A vacuum adsorption type plate fixing device, comprising an adsorption stage (1) and a vacuum chamber (2) formed inside the adsorption stage (1), characterized in that: The top of the adsorption stage (1) is provided with an installation hole (3) that communicates with the vacuum chamber (2); A valve seat (4) is fitted inside the mounting hole (3). A valve core (5) is slidably connected inside the valve seat (4). One end of the valve core (5) extends through to the outside of the valve seat (4). An air guide hole (6) is opened on the surface of the valve seat (4). A first sealing ring (7) that works with the valve core (5) is fitted inside the valve seat (4). A support spring (8) is provided between the valve core (5) and the valve seat (4). A rubber pad (9) is fitted on the top of the valve seat (4).

2. The vacuum adsorption type plate fixing device according to claim 1, characterized in that: A second sealing ring (10) is provided between the valve seat (4) and the mounting hole (3).

3. The vacuum adsorption type plate fixing device according to claim 1, characterized in that: The adsorption stage (1) is equipped with an external pipe (11) that communicates with the vacuum chamber (2) on its front side.

4. The vacuum adsorption type plate fixing device according to claim 1, characterized in that: The bottom of the valve core (5) is symmetrically provided with sliding blocks (12), and the inside of the valve seat (4) is provided with sliding grooves (13) that are slidably connected to the sliding blocks (12).

5. The vacuum adsorption type plate fixing device according to claim 1, characterized in that: The bottom of the valve core (5) and the inside of the valve seat (4) are both equipped with a locking ring (14), which is used in conjunction with the support spring (8).

6. The vacuum adsorption type plate fixing device according to claim 1, characterized in that: The rubber pad (9) is slidably connected to the valve core (5).

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