Rubber structure for vacuum chuck and vacuum chuck

Abstract

The rubber structure for the vacuum suction cup comprises a suction cup framework (1), the bottom of the suction cup framework (1) is connected with rubber (2), at least two air channels (3) are formed between the rubber (2) and the suction cup framework (1), and every two adjacent air channels (3) are separated from each other through a separation part (301). A plurality of first suction holes (4) communicated with the air channels (3) are distributed in the rubber sheet (2), a lip ring (5) connected with the rubber sheet (2) is arranged outside each first suction hole (4), a first suction cavity (6) communicated with the first suction holes (4) is formed in the inner side of each lip ring (5), and an air inlet assembly is connected to the outside of each air channel (3) and used for blocking the air leakage air channel (3) from other air channels (3) when any air channel (3) leaks air. According to the invention, the adsorption effect on the rough-surface objects can be improved.

Description

Technical Field

[0001] This invention relates to a vacuum suction cup, and more particularly to a rubber structure for a vacuum suction cup and the vacuum suction cup itself. Background Technology

[0002] Existing vacuum suction cups, as shown in patent 202422837405.2, include a handle, a suction cup frame, and a rubber sheet. The rubber sheet is fastened to the bottom of the suction cup frame, and the outer side of the rubber sheet adheres to the surface of the object through a lip. The inner side of the lip forms a suction chamber, so that when in use, the air in the suction chamber is drawn by the suction pump in the handle, thereby realizing the vacuum suction cup's function of adsorbing and moving objects.

[0003] However, the aforementioned vacuum suction cups often exhibit poor adhesion and are prone to slipping off when adsorbing textured items. This is because the uneven surface of textured items creates numerous small, narrow air vents; the rubber lip, limited by its shape and hardness, cannot completely fill these vents during attachment and suction, resulting in air leakage and relatively poor adhesion stability. Furthermore, using a softer rubber for the lip increases the likelihood of breakage and reduces its lifespan. Additionally, the longer contact length between the lip and the item's surface makes it difficult to guarantee no air leakage at any point of contact; any leakage disrupts the negative pressure in the suction chamber, causing the vacuum suction cup to detach.

[0004] Therefore, existing vacuum suction cups have the problem of poor adsorption effect when adsorbing rough-textured items. Summary of the Invention

[0005] The purpose of this invention is to provide a rubber structure for a vacuum suction cup and a vacuum suction cup itself. This improves the suction effect on textured surfaces.

[0006] The technical solution of the present invention: A rubber structure for a vacuum suction cup includes a suction cup skeleton, a rubber sheet connected to the bottom of the suction cup skeleton, at least two air channels formed between the rubber sheet and the suction cup skeleton, adjacent air channels being separated from each other by a partition, a plurality of first suction holes communicating with the air channels being distributed on the rubber sheet, a lip ring connected to the rubber sheet being provided on the outside of each first suction hole, a first suction cavity communicating with the first suction hole being formed on the inner side of the lip ring, and an air intake assembly connected to the outside of the air channels, the air intake assembly being used to block the leaking air channel from other air channels when any air channel leaks.

[0007] In the aforementioned vacuum suction cup rubber structure, the outer side of the suction cup skeleton is fastened to a limiting plate via a stepped groove. The outer wall of the limiting plate is in contact with the rubber, and an air passage is formed between the inner wall of the limiting plate and the suction cup skeleton. Several air guide holes that cooperate with the first suction hole are distributed on the limiting plate.

[0008] In the aforementioned rubber structure for a vacuum suction cup, the partition includes a groove and a strip respectively provided on the limiting plate and the suction cup frame. After the limiting plate is installed in place, the groove and the strip interlock with each other and separate adjacent air passages.

[0009] In the aforementioned vacuum suction cup rubber structure, the bottom periphery of the suction cup skeleton forms a fastening part, the periphery of the rubber is fastened and connected to the fastening part via a fastening groove, and the middle of the rubber is fastened and connected to a limiting plate.

[0010] In the aforementioned rubber structure for a vacuum suction cup, the lower end of the fastening part is provided with an annular groove, and the rubber is fastened to the groove by a retaining ring around its perimeter.

[0011] In the aforementioned vacuum suction cup rubber structure, the bottom of the rubber is provided with an annular lip, the bottom surface of the lip is lower than the lip ring, and the inner side of the lip forms a second suction cavity.

[0012] In the aforementioned vacuum suction cup rubber structure, the rubber is provided with a second suction hole, the outer side of the second suction hole is connected to a second suction chamber, and the inner side of the second suction hole is connected to an air passage.

[0013] In the aforementioned rubber structure for a vacuum suction cup, the air intake assembly includes a main air intake pipe and multiple branch air intake pipes. The main air intake pipe is connected to multiple branch air intake pipes via connectors. One end of each branch air intake pipe is connected to an air passage. Each branch air intake pipe is equipped with a two-way valve. The outside of the main air intake pipe is used to connect a suction pump. The two-way valve is used to close the valve to block the leaking air passage from the main air intake pipe when any air passage leaks.

[0014] In the aforementioned rubber structure for a vacuum suction cup, the inner walls of the lip ring and the lip edge are all formed with inclined deformable surfaces, and the inner diameter of the deformable surfaces gradually increases along the opening direction.

[0015] In the aforementioned rubber structure for a vacuum suction cup, the outer side of the lip is provided with a first deformation groove that matches the lip, and the rubber around the lip ring is provided with honeycomb-shaped reinforcing ribs. The inner side of the reinforcing ribs forms several second deformation grooves that match the lip ring, and each lip ring is located in a second deformation groove.

[0016] A vacuum suction cup is also provided, which includes the aforementioned rubber structure for a vacuum suction cup.

[0017] The vacuum suction cup specifically includes a handle, a suction pump inside the handle, and a suction cup frame connected to the bottom of the handle. The air passage is connected to the suction pump via an air intake assembly.

[0018] In the aforementioned vacuum suction cup, the air passage is connected to a pressure sensing element located inside the handle via a sensing component. The sensing component includes multiple pressure sensing tubes, and each pressure sensing tube is connected to an air passage and a pressure sensing element at both ends.

[0019] In the aforementioned vacuum suction cup, an exhaust assembly is connected to the outside of the air passage. The exhaust assembly includes a pressure relief component, an exhaust chamber is formed on the inner side of the pressure relief component, a main exhaust port and multiple branch exhaust ports are respectively provided on the outer side of the exhaust chamber, the external side of the branch exhaust ports is connected to the air passage via an exhaust pipe, and a pressure relief button is provided on the external side of the main exhaust port.

[0020] Compared with the prior art, the present invention has the following characteristics:

[0021] (1) The present invention, through the structural cooperation of the first suction hole and the lip ring, enables the bottom of the rubber to form several independent first suction chambers, and cooperates with the air channel to simultaneously evacuate each first suction chamber, thereby realizing the individual adsorption of the surface of the item by each first suction chamber; under the above cooperation, the present invention can shorten the contact length between each lip ring and the surface of the item, thereby reducing the possibility of air leakage in the first suction chamber.

[0022] (2) By combining the structures of the second suction chamber and the second suction hole, the present invention can perform double adsorption on the surface of the item by combining the second suction chamber and the first suction chamber when pumping air. Thus, when any one or several first suction chambers have air leakage problems, it will not affect the stable suction of other first suction chambers, thereby effectively improving the adsorption stability of the rough surface item.

[0023] (3) Based on the above, by setting and limiting the structure of the air intake component, when any air passage has a leakage problem, the vacuum suction cup can also close the two-way valve corresponding to the leaking air passage, so that the leaking air passage and the main air intake pipe are mutually blocked, thereby allowing the other air passages to maintain a negative pressure suction state in this state, effectively improving its adsorption effect and adsorption stability.

[0024] (4) By limiting the connection structure of the suction cup skeleton, the limiting plate and the rubber, on the one hand, the rubber can be used to fix the limiting plate to ensure the connection stability of the three. On the other hand, the rubber can be positioned by the cooperation of the slot and the ring. At the same time, the middle part of the rubber can be positioned by the fastening of the limiting plate and the rubber, so that the air guide hole on the limiting plate can be completely aligned with the first suction hole and the second suction hole on the rubber, effectively preventing the rubber from affecting the suction stability of the vacuum suction cup due to force displacement.

[0025] (5) By setting the deformable surface, the lip ring and lip edge can expand outward stably during the adsorption process and drive the suction cup skeleton to approach the surface of the object, thereby improving its adsorption stability; on this basis, by setting the first deformation groove and the second deformation groove, sufficient space can be left for the lip edge and lip ring to deform, thereby ensuring the deformation effect of the lip edge and lip ring during the adsorption process.

[0026] (6) By limiting the structure of the sensing component, it is possible to use each air pressure sensing element to detect the air pressure of each air passage, thereby controlling the corresponding two-way valve to operate when any suction chamber has a leakage problem, ensuring the effectiveness of the invention; by limiting the structure of the exhaust component, the operator can simultaneously depressurize each air passage through the pressure relief button, improving its ease of operation.

[0027] Therefore, the present invention can improve the adsorption effect on textured materials. Attached Figure Description

[0028] Figure 1 This is a view of the rubber side of Example 1;

[0029] Figure 2 This is a schematic diagram showing the connection of the suction cup frame, the limiting plate, and the rubber in Example 1;

[0030] Figure 3 yes Figure 2 A magnified view from direction A;

[0031] Figure 4 yes Figure 2 A magnified view from direction B;

[0032] Figure 5 yes Figure 1 The shape after removing the rubber;

[0033] Figure 6 This is an external view of the intake assembly side of Embodiment 1;

[0034] Figure 7 This is an external view of Example 2;

[0035] Figure 8 This is an external view of Example 2 after the limiting plate and rubber have been removed;

[0036] Figure 9 This is a view of Example 2 after the handle has been removed;

[0037] Figure 10 yes Figure 9 The outline on the other side.

[0038] The labels in the attached diagram are as follows: 1-suction cup frame, 2-rubber, 3-air passage, 4-first suction hole, 5-lip ring, 6-first suction chamber, 7-limiting plate, 8-air guide hole, 9-fastening part, 10-fastening groove, 11-slot, 12-ring, 13-lip edge, 14-second suction chamber, 15-second suction hole, 16-deformation surface, 17-first deformation groove, 18-second deformation groove, 19-protrusion strip, 20-handle, 21-main air inlet pipe, 22-sub-air inlet pipe, 23-connector, 24-two-way valve, 25-suction pump, 26-pressure sensing element, 27-pressure sensing tube, 28-pressure relief component, 29-exhaust pipe, 30-pressure relief button, 301-separation part. Detailed Implementation

[0039] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.

[0040] Example 1. A rubber structure for a vacuum suction cup, configured as follows: Figure 1-6 As shown, the device includes a suction cup frame 1, with a rubber sheet 2 connected to the bottom of the suction cup frame 1. Two air passages 3 are formed between the rubber sheet 2 and the suction cup frame 1, and the two air passages 3 are separated from each other by a partition 301. Several first suction holes 4 communicating with the air passages 3 are distributed on the rubber sheet 2. Each first suction hole 4 is provided with a lip ring 5 connected to the rubber sheet 2 on its outer side. A first suction cavity 6 communicating with the first suction hole 4 is formed on the inner side of the lip ring 5. An air intake assembly is connected to the outside of the air passages 3. The air intake assembly is used to block the leaking air passage 3 from being separated from other air passages 3 when any air passage 3 leaks.

[0041] The suction cup frame 1 is connected to the limiting plate 7 via a stepped groove. The outer wall of the limiting plate 7 is in contact with the rubber 2. An air passage 3 is formed between the inner wall of the limiting plate 7 and the suction cup frame 1. Several air guide holes 8 are distributed on the limiting plate 7 to cooperate with the first suction hole 4. Each air guide hole 8 corresponds to one first suction hole 4. The inner side of the air guide hole 8 is connected to the air passage 3.

[0042] The partition 301 includes a groove and a strip respectively provided on the limiting plate 7 and the suction cup frame 1. After the limiting plate 7 is installed in place, the groove and the strip interlock with each other and separate the adjacent air passages 3.

[0043] The suction cup frame 1 has a fastening part 9 around its bottom. The rubber 2 is fastened to the fastening part 9 around its perimeter via the fastening groove 10. The inner wall of the rubber 2 is fastened to the limiting plate 7 and the limiting plate 7 is squeezed by the elasticity, so that the limiting plate 7 is stably fastened in the stepped groove.

[0044] The lower end of the fastening part 9 is provided with an annular groove 11. The rubber 2 is fastened to the groove 11 by a retaining ring 12. The suction cup frame 1 limits the rubber 2 radially by the mutual fastening of the retaining ring 12 and the groove 11.

[0045] The bottom of the rubber sheet 2 is provided with annular lips 13. There are multiple lips 13, which are distributed in a radial direction of the rubber sheet 2 at intervals. The bottom surface of the lip 13 is lower than the lip ring 5. The inner side of the lip 13 forms a second suction cavity 14. The first suction cavity 6 is located in the second suction cavity 14 and is separated from the second suction cavity 14 by the lip ring 5 during suction.

[0046] The rubber sheet 2 has a second suction hole 15 in the middle, and the outside of the second suction hole 15 is connected to the second suction cavity 14. The middle part of the limiting plate 7 is connected to the second suction hole 15 through the air guide hole 8.

[0047] The air intake assembly includes a main air intake pipe 21 and two branch air intake pipes 22. The main air intake pipe 21 is connected to the two branch air intake pipes 22 via a connector 23. The connector 23 can be a three-way connector. One end of each branch air intake pipe 22 is connected to an air passage 3. Each branch air intake pipe 22 is connected to a two-way valve 24. The outside of the main air intake pipe 21 is used to connect a suction pump. The two-way valve 24 is used to close the valve to block the leaking air passage 3 from the main air intake pipe 21 when any air passage 3 leaks.

[0048] The second suction hole 15 and part of the first suction hole 4 are connected to one of the air passages 3, and the remaining first suction holes 4 are connected to the other air passage 3, so that when the air passage 3 where the second suction hole 15 is located has an air leakage problem, the other air passage 3 still maintains a negative pressure suction state.

[0049] The inner walls of the lip ring 5 and the lip edge 13 are all formed with inclined deformable surfaces 16, and the inner diameter of the deformable surfaces 16 gradually increases along the opening direction.

[0050] The outer side of the lip 13 is provided with a first deformation groove 17 that matches the lip 13.

[0051] The rubber 2 around the lip ring 5 is provided with honeycomb-shaped reinforcing ribs, and several second deformation grooves 18 that fit the lip ring 5 are formed on the inner side of the reinforcing ribs. The second deformation grooves 18 are hexagonal in shape, and each lip ring 5 is located in one second deformation groove 18.

[0052] The limiting plate 7 has honeycomb-shaped protrusions 19 on the surface near the rubber 2. The distribution of the protrusions 19 is the same as that of the reinforcing ribs of the rubber 2. The rubber 2 has a recess on the side near the limiting plate 7 that matches the protrusions 19. The limiting plate 7 and the rubber 2 are interlocked by the protrusions 19 and the recess, thereby limiting the rubber 2 around each first suction cavity 6 and second suction cavity 14.

[0053] The first deformation groove 17 and the second deformation groove 18 are respectively used to avoid the lip edge 13 and the lip ring 5 during deformation and adsorption, so that the two can be completely deformed under the suction action to ensure their adsorption effect.

[0054] The rubber sheet 2 is hexagonal in shape, and the lip ring 5, retaining ring 12, lip edge 13, and reinforcing rib are integrally formed with the rubber sheet 2.

[0055] In this embodiment, during installation, the limiting plate 7 is first fastened to the suction cup frame 1, and the fastening groove and fastening strip form a partition 301 after being fastened together. Then, the rubber sheet 2 is fitted onto the bottom of the suction cup frame 1 through the cooperation of the fastening part 9 and the fastening groove 10, and the rubber sheet 2 and the suction cup frame 1 are fastened together through the slot 11 and the retaining ring 12. At the same time, the inner wall of the rubber sheet 2 is fastened to the limiting plate 7 through the cooperation of the protrusion 19 and the recess. Under the above cooperation, the three can be connected to each other and form a radial limit, thereby preventing the rubber sheet 2 from shifting under force during the adsorption process and ensuring that each air guide hole 8 is completely connected to the first suction hole 4 and the second suction hole 15.

[0056] In this embodiment, during use, the air pump inside the handle sequentially draws air from the second suction chamber 14 and each of the first suction chambers 6 through the main air inlet pipe 21, connector 23, branch air inlet pipe 22, and air passage 3. This causes the lip 13 to fold inward under suction, allowing the lip ring 5 to adhere to the surface of the object. Then, the lip ring 5 adheres to the surface of the object, and under negative pressure, it adsorbs the object. This ensures that the inner side of each lip ring 5 on the rubber 2 forms a first suction chamber 6 and achieves adsorption, while the gaps between adjacent lip rings 5 ​​serve as second suction chambers 14, achieving adsorption. This results in dual adsorption of the object's surface.

[0057] Based on the above, when a gap appears where the lip 13 fits against the item, the air passage 3 connected to the second suction chamber 14 leaks air. At this time, the two-way valve 24 on the branch air inlet pipe 22 connected to the air passage 3 closes the valve, blocking the air path between the air passage 3 and the main air inlet pipe 21, so that the other air passage 3 can maintain a negative pressure state and continue to adsorb the surface of the item, thereby improving the suction stability of this embodiment.

[0058] Example 2. Vacuum suction cup, configured as follows Figure 7-10 As shown, the vacuum suction cup includes a rubber structure for a vacuum suction cup as described in Embodiment 1. The vacuum suction cup includes a handle 20, a suction pump 25 is provided inside the handle 20, and the bottom of the handle 20 is detachably connected to the suction cup frame 1. The air passage 3 is connected to the suction pump 25 via an air intake assembly.

[0059] The airway 3 is connected to a pressure sensing element 26 located inside the handle 20 via a sensing assembly. The sensing assembly includes two pressure sensing tubes 27, each of which is connected to an airway 3 and a pressure sensing element 26 at its two ends.

[0060] The air passage 3 is externally connected to an exhaust assembly, which includes a pressure relief component 28. The inner side of the pressure relief component 28 forms an exhaust chamber. The outer side of the exhaust chamber is provided with a main exhaust port and two branch exhaust ports. The outer side of the branch exhaust ports is connected to the air passage 3 via exhaust pipes 29. There are two exhaust pipes 29, and each exhaust pipe 29 corresponds to one air passage 3. The main exhaust port is provided with a pressure relief button 30.

[0061] The pressure relief button 30 is rotatably connected to the pressure relief component 28. One end of the pressure relief button 30 is fitted with the main exhaust port through a plug. An elastic element connects the pressure relief button 30 and the pressure relief component 28. In its natural state, the pressure relief button 30 closes the main exhaust port through the elastic force of the elastic element. The operator can control the pressure relief button 30 to rotate until the plug separates from the main exhaust port by pressing it, thereby allowing the exhaust chamber to communicate with the outside air and realizing the exhaust function.

[0062] Based on Example 1, this example defines the structure of the vacuum suction cup so that when the air passage 3 connected to the second suction hole 15 leaks, the air pressure sensing element 26 corresponding to the air passage 3 can detect it and control the two-way valve 24 corresponding to the air passage 3 to close the valve, while the other air passage 3 continues to maintain a negative pressure adsorption state. This effectively avoids the overall failure of the vacuum suction cup due to leakage in a single air passage 3 and ensures its suction stability.

[0063] When it is necessary to depressurize the second suction chamber 14 and each of the first suction chambers 6, the operator can press the pressure relief button 30 to release the plug from the main exhaust port, thereby enabling each of the second suction chambers 14 and each of the first suction chambers 6 to connect with the external environment through the exhaust pipe 29 and the exhaust chamber, thus realizing the manual pressure relief function of the vacuum suction cup.

[0064] Example 3. A rubber structure for a vacuum suction cup includes a suction cup frame 1, with a rubber sheet 2 connected to the bottom of the suction cup frame 1. The connection structure between the suction cup frame 1 and the rubber sheet 2 is the same as in Example 1. The shape of the rubber sheet 2 is the same as in Example 1. Three or more air channels 3 are formed between the rubber sheet 2 and the suction cup frame 1. Adjacent air channels 3 are separated from each other by a partition 301. An air intake component is connected to the outside of the air channel 3. The air intake component is used to block the leaking air channel 3 from other air channels 3 when any air channel 3 leaks.

[0065] The number of the partitions 301 is multiple. Each partition 301 includes a groove and a strip respectively provided on the limiting plate 7 and the suction cup frame 1. After the limiting plate 7 is installed in place, the groove and the strip interlock with each other and separate the adjacent air passages 3.

[0066] The air intake assembly includes a main air intake pipe 21 and multiple branch air intake pipes 22. The main air intake pipe 21 is connected to multiple branch air intake pipes 22 via a connector 23. One end of each branch air intake pipe 22 is connected to an air passage 3. Each branch air intake pipe 22 is connected to a two-way valve 24. The outside of the main air intake pipe 21 is used to connect a suction pump. The two-way valve 24 is used to close the valve to block the leaking air passage 3 from the main air intake pipe 21 when any air passage 3 leaks.

[0067] The second suction hole 15 and each of the first suction holes 4 are connected to each airway 3, so that when any airway 3 has a leakage problem, the other airways 3 still maintain a negative pressure suction state.

[0068] Compared with Example 1, this example increases the number of air channels 3, thereby reducing the number of first suction chambers 6 corresponding to each air channel 3, thus improving the adsorption stability of the vacuum suction cup when any air channel 3 leaks.

[0069] Based on this, the manufacturer can change the structure and quantity of the partition 301 according to the requirements, so that the first suction hole 4 and the second suction hole 15 at different positions are connected to the corresponding air channel 3 respectively, thereby ensuring the adsorption effect of the vacuum suction cup on the surface of the object after any air channel 3 leaks.

[0070] Example 4. Vacuum suction cup, which includes a rubber structure for vacuum suction cup as described in Example 3. The vacuum suction cup includes a handle 20, a suction pump 25 is provided inside the handle 20, and the bottom of the handle 20 is detachably connected to the suction cup frame 1. The air passage 3 is connected to the suction pump 25 via an air intake assembly.

[0071] The airway 3 is connected to a pressure sensing element 26 located inside the handle 20 via a sensing assembly. The sensing assembly includes a pressure sensing tube 27. The number of pressure sensing elements 26 and pressure sensing tubes 27 is the same as the number of airways 3, and each pressure sensing tube 27 is connected to an airway 3 and a pressure sensing element 26 at both ends.

[0072] The air passage 3 is externally connected to an exhaust assembly, which includes a pressure relief component 28. The inner side of the pressure relief component 28 forms an exhaust chamber. The outer side of the exhaust chamber is provided with a main exhaust port and multiple branch exhaust ports. The external side of the branch exhaust ports is connected to the air passage 3 via exhaust pipes 29. The number of branch exhaust ports and exhaust pipes 29 is the same as the number of air passages 3, and each exhaust pipe 29 corresponds to one air passage 3. A pressure relief button 30 is provided on the outside of the main exhaust port.

[0073] The pressure relief button 30 is rotatably connected to the pressure relief component 28. One end of the pressure relief button 30 is fitted with the main exhaust port through a plug. An elastic element connects the pressure relief button 30 and the pressure relief component 28. In its natural state, the pressure relief button 30 closes the main exhaust port through the elastic force of the elastic element. The operator can control the pressure relief button 30 to rotate until the plug separates from the main exhaust port by pressing it, thereby allowing the exhaust chamber to communicate with the outside air and realizing the exhaust function.

[0074] Based on Example 3, this example adjusts the structure of the exhaust component and the sensing component for the vacuum suction cup structure of multiple air passages 3, so that each air pressure sensing element 26 can detect the air pressure of one air passage 3 independently, ensuring the effectiveness of this example.

Claims

1. A rubber structure for a vacuum suction cup, characterized in that: The device includes a suction cup frame (1), with a rubber sheet (2) connected to the bottom of the suction cup frame (1). At least two air passages (3) are formed between the rubber sheet (2) and the suction cup frame (1). Adjacent air passages (3) are separated from each other by a partition (301). Several first suction holes (4) connecting the air passages (3) are distributed on the rubber sheet (2). Each first suction hole (4) is provided with a lip ring (5) connecting the rubber sheet (2) on its outside. A first suction chamber (6) connecting the first suction hole (4) is formed on the inside of the lip ring (5). An air intake component is connected to the outside of the air passage (3). The air intake component is used to block the leaking air passage (3) from other air passages (3) when any air passage (3) leaks.

2. The rubber structure for a vacuum suction cup according to claim 1, characterized in that: The suction cup skeleton (1) is connected to the limiting plate (7) by a stepped groove. The outer wall of the limiting plate (7) is in contact with the rubber (2). An air passage (3) is formed between the inner wall of the limiting plate (7) and the suction cup skeleton (1). Several air guide holes (8) that cooperate with the first suction hole (4) are distributed on the limiting plate (7).

3. The rubber structure for a vacuum suction cup according to claim 1, characterized in that: The bottom of the rubber sheet (2) is provided with an annular lip (13), the bottom surface of the lip (13) is lower than the lip ring (5), and the inner side of the lip (13) forms a second suction cavity (14).

4. The rubber structure for a vacuum suction cup according to claim 3, characterized in that: The rubber sheet (2) is provided with a second suction hole (15). The outer side of the second suction hole (15) is connected to the second suction chamber (14), and the inner side of the second suction hole (15) is connected to an airway (3).

5. The rubber structure for a vacuum suction cup according to claim 1, characterized in that: The air intake assembly includes a main air intake pipe (21) and multiple branch air intake pipes (22). The main air intake pipe (21) is connected to multiple branch air intake pipes (22) via a connector (23). One end of each branch air intake pipe (22) is connected to an air passage (3). Each branch air intake pipe (22) is connected to a two-way valve (24). The outside of the main air intake pipe (21) is used to connect a suction pump. The two-way valve (24) is used to block the leaking air passage (3) from the main air intake pipe (21) by closing the valve when any air passage (3) leaks.

6. The rubber structure for a vacuum suction cup according to claim 3, characterized in that: The inner walls of the lip ring (5) and the lip edge (13) are all formed with inclined deformable surfaces (16), and the inner diameter of the deformable surfaces (16) gradually increases along the opening direction.

7. The rubber structure for a vacuum suction cup according to claim 1, characterized in that: The outer side of the lip (13) is provided with a first deformation groove (17) that matches the lip (13), and the rubber (2) around the lip ring (5) is provided with honeycomb-shaped reinforcing ribs. The inner side of the reinforcing ribs forms several second deformation grooves (18) that match the lip ring (5). Each lip ring (5) is located in a second deformation groove (18).

8. A vacuum suction cup, characterized in that: The vacuum suction cup includes a rubber structure for a vacuum suction cup as described in any one of claims 1-7; The vacuum suction cup includes a handle (20), a suction pump (25) is provided inside the handle (20), the bottom of the handle (20) is connected to the suction cup frame (1), and the air passage (3) is connected to the suction pump (25) via the air intake assembly.

9. The vacuum chuck according to claim 8, characterized in that: The airway (3) is connected to a pressure sensing element (26) located in the handle (20) via a sensing component. The sensing component includes multiple pressure sensing tubes (27), and each pressure sensing tube (27) is connected to an airway (3) and a pressure sensing element (26) at both ends.

10. The vacuum chuck according to claim 8, characterized in that: The air passage (3) is connected to an exhaust assembly, which includes a pressure relief component (28). An exhaust chamber is formed on the inner side of the pressure relief component (28). A main exhaust port and multiple branch exhaust ports are provided on the outer side of the exhaust chamber. The outer side of the branch exhaust ports is connected to the air passage (3) via an exhaust pipe (29). A pressure relief button (30) is provided on the outer side of the main exhaust port.

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