One-way suction cup

Abstract

The one-way suction cup comprises a cup body, a cup opening is formed in the bottom of the cup body, the cup opening is concave inwards and is in a bowl shape, and the wall thickness close to the outer edge of the cup opening is gradually reduced; radial air guide grooves which are formed from the center of the disc opening to the position close to the outer edge of the disc opening are formed in the inner wall of the disc opening, and circumferential air guide grooves which are concentric with the center of the disc opening, are formed in the circumferential direction of the disc opening and are connected with the radial air guide grooves are further formed in the inner wall of the disc opening; a mounting part is arranged at the top of the tray body; a differential pressure pipe is arranged at the top of the disc body, a differential pressure channel communicated with the radial air guide groove or / and the circumferential air guide groove is arranged in the differential pressure pipe, a closed seam is arranged at one end, opposite to the bottom of the disc body, of the differential pressure pipe, the seam wall of the closed seam has a separated state and an attached state, and the differential pressure channel is in an open state when the seam wall of the closed seam is in the separated state.

Description

Technical Field

[0001] The utility model relates to the field of suction cups, in particular to a one-way suction cup. Background Art

[0002] The suction cup realizes fixation on the surface of an adsorbed object through adsorption and is widely used as a core fixing component for fixing various items. The traditional suction cup uses extrusion to discharge the air in the mouth of the suction cup to generate negative pressure for fixation on the surface of the adsorbed object during fixation. However, this fixation method has poor stability. Especially when the suction cup is extruded, problems such as incomplete discharge of air in the mouth of the suction cup are likely to occur, resulting in the vacuum degree in the mouth of the suction cup not reaching the fixation requirement. In response to this problem, suction cups with an air extraction function have been designed on the market. By extracting air, the air in the mouth of the suction cup is discharged to improve the vacuum degree in the mouth of the suction cup. Such suction cups usually only have one air extraction port, and the maintenance of its vacuum degree requires the assistance of other structures (such as setting a diaphragm outside the air extraction port), resulting in a large number of components in the entire suction cup device, troublesome assembly, and the need to specifically mold to produce the diaphragm, with a low degree of integration. Content of the Utility Model

[0003] Based on the above problems, the purpose of the utility model is to provide a one-way suction cup with a reliable structure, which can be directly integrally formed during injection molding or injection gluing to have a self-contained one-way cut-off function.

[0004] In view of the above problems, the following technical solution is provided: A one-way suction cup includes a disk body. A disk opening is provided at the bottom of the disk body. The disk opening is concave in a bowl shape and the wall thickness near the outer edge gradually thins. A radial air guide groove is provided on the inner wall of the disk opening, which is opened from the center of the disk opening towards the position near the outer edge of the disk opening. The inner wall of the disk opening is also provided with a circumferential air guide groove that is concentric with the center of the disk opening, is opened along its circumferential direction, and is connected to each radial air guide groove. An installation part is provided at the top of the disk body. A differential pressure pipe is provided at the top of the disk body. A differential pressure channel that is communicated with the radial air guide groove or / and the circumferential air guide groove is provided in the differential pressure pipe. A closing seam is provided at one end of the differential pressure pipe facing away from the bottom of the disk body. The wall of the closing seam includes two states: separated and fitted. When the wall of the closing seam is in the separated state, the differential pressure channel is in an open state.

[0005] In the above structure, both the disk body and the differential pressure tube are made of rubber material, which are directly integrally formed in the mold during production, and the closed seam is constructed or generated by cutting in the later stage; the wall thickness near the outer edge of the disk opening gradually decreases, which can improve the fitting effect at the outer edge, and at the same time, the support strength can be gradually increased at the position far from the outer edge to ensure the stability of the suction cup; the radial air guide groove and the circumferential air guide groove can guide the air on the inner wall of the disk opening and discharge it from the differential pressure channel in the differential pressure tube, avoiding the formation of local air cavities between the inner wall of the disk opening and the surface of the adsorbed object to cause air entrapment and improving the exhaust effect; when in use, the top of the disk body is connected to the air extraction device through the installation part, and the air extraction device can be pulsating air extraction or continuous air extraction. When extracting air, as the pressure on the outer wall of the differential pressure tube decreases, a pressure difference is formed between it and the air pressure in the disk opening. The air in the disk opening acts on the inner wall of the differential pressure channel and opens the closed seam. When the air extraction stops, due to the decrease in the pressure in the disk opening, the air pressure on the outer wall of the differential pressure tube is greater than or equal to the air pressure in the differential pressure channel, and the closed seam closes under the action of the air pressure on the outer wall of the differential pressure tube or its own elastic reset to cut off the differential pressure channel to achieve pressure holding; effectively simplifies the one-way valve structure, reduces the production cost, simplifies the production and assembly process, and improves the overall reliability.

[0006] The present utility model is further configured such that the differential pressure tube extends outward at the connection with the disk body, so that a compression section is formed at the tube wall position.

[0007] In the above structure, the opening and closing of the closed seam of the differential pressure tube are realized through the pressure difference between the differential pressure channel and the outer wall of the differential pressure tube during operation. Therefore, the differential pressure tube needs to be set to extend outward so that a part of the tube wall forms a compression section for controlling the closed seam.

[0008] The present utility model is further configured such that the aspect ratio of the cross-section of the differential pressure tube is greater than 1:1, and the opening direction of the closed seam is the same as the long direction of the cross-section of the differential pressure tube.

[0009] In the above structure, the aspect ratio of the cross-section of the differential pressure tube is preferably 3 - 10:1. Due to the difference in the aspect ratio, the deformation of the differential pressure tube in the width direction is smoother under the action of the differential pressure.

[0010] The present utility model is further configured such that the cross-section of the differential pressure channel is offset from the cross-section of the differential pressure tube.

[0011] In the above structure, the differential pressure channel can ensure that air always acts on the inner wall of the differential pressure tube, avoiding the failure of the closed seam caused by the closing of the differential pressure channel.

[0012] The present utility model is further configured such that the circumferential air guide grooves are arranged offset from each other with the center of the disk opening as the reference.

[0013] In the above structure, it is beneficial to converge the air at various positions on the inner wall of the disk opening.

[0014] The present utility model is further configured such that a sealing ring is provided on a surface of the outer edge of the socket opening facing away from the top of the socket body.

[0015] In the above structure, multiple sealing rings can be provided to improve the airtightness with the surface of the adsorbed object.

[0016] The present utility model is further configured such that a pulling ear is provided at a side wall position of the outer edge of the socket opening.

[0017] In the above structure, after adsorption, the outer edge of the socket opening can be lifted through the pulling ear to allow air to enter the socket opening, thereby removing the suction cup.

[0018] The present utility model is further configured such that the socket body further has a pressure relief hole located inside the socket opening and penetrating through its bottom and top; or a plug hole with an inner diameter larger than that of the pressure relief hole is provided at one end of the pressure relief hole facing the socket opening.

[0019] In the above structure, the pressure relief hole is connected to a pressure relief valve, and the pressure inside the socket opening can be balanced with the outside through the pressure relief hole to achieve the removal of the suction cup; when a plug hole is provided, the end face at the junction of the plug hole and the pressure relief hole can be adapted to the plug to control pressure relief.

[0020] The present utility model is further configured such that one end of the pressure relief hole facing the inside of the socket opening is opened through a radial air guide groove and / or a circumferential air guide groove.

[0021] In the above structure, the connection of the pressure relief hole with the radial air guide groove and / or the circumferential air guide groove is conducive to quickly distributing air throughout the socket opening, avoiding the difficulty of removing the suction cup due to the existence of local negative pressure parts between the inner wall of the socket opening and the surface of the adsorbed object.

[0022] The present utility model is further configured such that the mounting portion is a mounting bracket located at the top of the socket body and embedded in the socket body, and mounting holes are provided on the mounting bracket.

[0023] In the above structure, the mounting bracket is made of plastic or metal, and the mounting bracket is directly integrally embedded when the socket body is injected with glue or molded; embedded nuts are provided in the mounting holes for connecting with the fixed parts mounted on the suction cup.

[0024] Advantages of the present utility model: Both the disk body and the differential pressure tube are made of rubber material, and are directly integrally formed in the mold during production, while constructing or generating a closed seam by cutting in the later stage; the wall thickness near the outer edge of the disk opening gradually thins, which can improve the fitting effect at the outer edge, and at the same time can gradually increase the support strength at a position far from the outer edge to ensure the stability of the suction cup; the radial air guide grooves and the circumferential air guide grooves can guide the air on the inner wall of the disk opening and discharge it from the differential pressure channel in the differential pressure tube, avoiding the formation of local air cavities between the inner wall of the disk opening and the surface of the adsorbed object to cause air retention, and improving the exhaust effect; during use, the top of the disk body is connected to the air extraction device through the installation part, and the air extraction device can perform pulsating air extraction or continuous air extraction. When extracting air, as the pressure on the outer wall of the differential pressure tube decreases, a pressure difference is formed with the air pressure in the disk opening. The air in the disk opening acts on the inner wall of the differential pressure channel and opens the closed seam. When the air extraction stops, due to the decrease in the pressure in the disk opening, the air pressure on the outer wall of the differential pressure tube is greater than or equal to the air pressure in the differential pressure channel, and the closed seam closes under the action of the air pressure on the outer wall of the differential pressure tube or its own elastic reset to cut off the differential pressure channel to achieve pressure holding; effectively simplifies the one-way valve structure, reduces the production cost, simplifies the production and assembly process, and improves the overall reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 FIG. is a schematic perspective view of the overall three-dimensional structure of the present utility model.

[0026] Figure 2 FIG. is a schematic perspective view of the first fully-sectioned three-dimensional structure of the present utility model.

[0027] Figure 3 FIG. is a schematic perspective view of the second fully-sectioned three-dimensional structure of the present utility model.

[0028] Figure 4 FIG. is a schematic perspective view of the first exploded three-dimensional structure of the present utility model.

[0029] Figure 5 FIG. is a schematic perspective view of the second exploded three-dimensional structure of the present utility model.

[0030] Meanings of the reference numerals in the figures: 10 - disk body; 11 - disk opening; 111 - radial air guide groove; 112 - circumferential air guide groove; 113 - sealing ring; 114 - pull tab; 12 - installation part; 13 - differential pressure tube; 131 - differential pressure channel; 132 - closed seam; 133 - compression section; 14 - pressure relief hole; 141 - plug hole; 15 - installation bracket; 151 - installation hole; 152 - embedded nut. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] The following will further describe in detail the specific embodiments of the present utility model in conjunction with the drawings and embodiments. The following embodiments are used to illustrate the present utility model, but are not used to limit the scope of the present utility model.

[0032] ReferenceFigures 1 to 5 , such as Figures 1 to 5 shown in a one-way suction cup, including a disk body 10, a disk opening 11 is provided at the bottom of the disk body 10, the disk opening 11 is concave and bowl-shaped, and the wall thickness near the outer edge gradually thins; a radial air guide groove 111 is provided on the inner wall of the disk opening 11 and is opened from the center of the disk opening 11 towards the position near the outer edge of the disk opening 11, and a circumferential air guide groove 112 is also provided on the inner wall of the disk opening 11, which is concentric with the center of the disk opening 11, is opened in the circumferential direction and is connected to each radial air guide groove 111; an installation part 12 is provided at the top of the disk body 10; a pressure difference pipe 13 is provided at the top of the disk body 10, a pressure difference channel 131 communicated with the radial air guide groove 111 or / and the circumferential air guide groove 112 is provided in the pressure difference pipe 13, and a closing seam 132 is provided at one end of the pressure difference pipe 13 facing away from the bottom of the disk body 10. The wall of the closing seam 132 includes two states of separation and fitting. When the wall of the closing seam 132 is in the separated state, the pressure difference channel 131 is in an open state.

[0033] In the above structure, both the disk body 10 and the pressure difference pipe 13 are made of rubber material, and are directly integrally formed in the mold during production, and at the same time, the closing seam 132 is constructed or generated by cutting in the later stage; the gradually thinning wall thickness near the outer edge of the disk opening 11 can improve the fitting effect at the outer edge, and at the same time can gradually increase the support strength at the position far from the outer edge to ensure the stability of the suction cup; the radial air guide groove 111 and the circumferential air guide groove 112 can guide the air on the inner wall of the disk opening 11 and discharge it from the pressure difference channel 131 in the pressure difference pipe 13, avoiding the formation of a local air cavity between the inner wall of the disk opening 11 and the surface of the adsorbed object to cause air entrapment and improving the exhaust effect; during use, the top of the disk body 10 is connected to an air extraction device (not shown in the figure) through the installation part 12. The air extraction device (not shown in the figure) can be pulsating air extraction or continuous air extraction. When air is extracted, as the pressure on the outer wall of the pressure difference pipe 13 decreases, a pressure difference is formed between it and the air pressure in the disk opening 11. The air in the disk opening 11 acts on the inner wall of the pressure difference channel 131 and opens the closing seam 132. When the air extraction stops, due to the decrease in the pressure in the disk opening 11, the air pressure on the outer wall of the pressure difference pipe 13 is greater than or equal to the air pressure in the pressure difference channel 131, and the closing seam 132 closes under the action of the air pressure on the outer wall of the pressure difference pipe 13 or its own elastic reset to cut off the pressure difference channel 131 to achieve pressure holding; effectively simplifies the one-way valve structure, reduces the production cost, simplifies the production and assembly process, and improves the overall reliability.

[0034] In this embodiment, the pressure difference pipe 13 is provided with an extension at the connection with the disk body 10 so that a compression section 133 is formed at the pipe wall position.

[0035] In the above structure, the opening and closing of the closing seam 132 is realized by the pressure difference between the pressure difference channel 131 and the outer wall of the pressure difference pipe 13 during the operation of the pressure difference pipe 13. Therefore, the pressure difference pipe 13 needs to be set to extend so that a part of the pipe wall forms a compression section 133 for controlling the closing seam 132.

[0036] In this embodiment, the aspect ratio of the cross-section of the differential pressure tube 13 is greater than 1:1, and the opening direction of the closing seam 132 is the same as the long-side direction of the cross-section of the differential pressure tube 13.

[0037] In the above structure, the aspect ratio of the cross-section of the differential pressure tube 13 is preferably 3-10:1. Due to the difference in the aspect ratio, the deformation of the differential pressure tube 13 in the width direction is smoother under the differential pressure.

[0038] In this embodiment, the cross-section of the differential pressure channel 131 is offset from the cross-section of the differential pressure tube 13.

[0039] In the above structure, the differential pressure channel 131 can ensure that air always acts on the inner wall of the differential pressure tube 13, avoiding the failure of the closing seam 132 caused by the closing of the differential pressure channel 131.

[0040] In this embodiment, the circumferential air guide grooves 112 are arranged in a plurality and are offset from each other with the center of the disk opening 11 as the reference.

[0041] In the above structure, it is beneficial to converge the air at various positions on the inner wall of the disk opening 11.

[0042] In this embodiment, a sealing ring 113 is provided on the surface of the outer edge of the disk opening 11 facing away from the top of the disk body 10.

[0043] In the above structure, the sealing ring 113 can be provided in multiple channels to improve the airtightness with the surface of the adsorbed object.

[0044] In this embodiment, a pulling ear 114 is provided at the position of the side wall of the outer edge of the disk opening 11.

[0045] In the above structure, after adsorption, the outer edge of the disk opening 11 can be lifted through the pulling ear 114 to allow air to enter the disk opening 11, thereby removing the suction cup.

[0046] In this embodiment, the disk body 10 is further provided with a pressure relief hole 14 located inside the disk opening 11 and penetrating through its bottom and top; or a plug hole 141 with an inner diameter larger than the inner diameter of the pressure relief hole is provided at one end of the pressure relief hole 14 facing the disk opening 11.

[0047] In the above structure, the pressure relief hole 14 is connected to a pressure relief valve (not shown in the figure). The pressure inside the disk opening 11 can be balanced with the outside through the pressure relief hole 14 to achieve the disassembly of the suction cup; when the plug hole 141 is provided, the end face at the junction of the plug hole 141 and the pressure relief hole 14 can be adapted to the plug (not shown in the figure) to control the pressure relief.

[0048] In this embodiment, the end of the pressure relief hole 14 facing the inside of the disk opening 11 is opened through the radial air guide groove 111 and / or the circumferential air guide groove 112.

[0049] In the above structure, the pressure relief hole 14 is connected with the radial air guide groove 111 and / or the circumferential air guide groove 112, which is conducive to quickly distributing air to the entire disc opening 11, avoiding the difficulty in removing the suction cup due to the existence of local negative pressure areas between the inner wall of the disc opening 11 and the surface of the adsorbed object.

[0050] In this embodiment, the mounting portion 12 is a mounting bracket 15 located on the top of the tray body 10 and embedded in the tray body 10 , and a mounting hole 151 is defined in the mounting bracket 15 .

[0051] In the above structure, the mounting bracket 15 is made of plastic or metal, and the mounting bracket 15 is directly embedded in the disc body 10 during glue injection or injection molding; a pre-embedded nut 152 is provided in the mounting hole 151 for interconnection with the fixed part installed on the suction cup.

[0052] The beneficial effects of the utility model are as follows: the disc body 10 and the pressure difference tube 13 are both made of rubber, and are directly integrally formed in the mold during production, and a closed seam 132 is constructed or generated by cutting at a later stage; the wall thickness of the disc mouth 11 near the outer edge is gradually thinned to improve the fitting effect at the outer edge, and at the same time, the support strength can be gradually increased at a position away from the outer edge to ensure the stability of the suction cup; the radial air guide groove 111 and the circumferential air guide groove 112 can guide the air on the inner wall of the disc mouth 11 and discharge it from the pressure difference channel 131 in the pressure difference tube 13, avoiding the formation of a local air cavity between the inner wall of the disc mouth 11 and the surface of the adsorbed object to form air suffocation, thereby improving the exhaustion effect; when in use, the top of the disc body 10 is connected to the air extraction device ( The one-way valve 132 is connected to the pressure relief valve 11 and the pressure relief valve 11 is connected to the pressure relief valve 11. The vacuum device (not shown in the figure) can be a pulsating vacuum or a continuous vacuum. During the vacuum, as the pressure on the outer wall of the pressure differential tube 13 decreases, a pressure difference is formed between it and the air pressure in the disc 11. The air in the disc 11 acts on the inner wall of the pressure differential channel 131 and opens the closed seam 132. When the vacuum stops, due to the pressure reduction in the disc 11, the air pressure on the outer wall of the pressure differential tube 13 is greater than or equal to the air pressure in the pressure differential channel 131. The closed seam 132 is closed and cuts off the pressure differential channel 131 under the action of the air pressure on the outer wall of the pressure differential tube 13 or its own elastic reset to maintain pressure. The one-way valve structure is effectively simplified, the production cost is reduced, the production and assembly process is simplified, and the overall reliability is improved.

[0053] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications of the above assumptions should also be regarded as the protection scope of the present invention.

Claims

1. A unidirectional suction cup, comprising a disk body (10), a disk opening (11) is provided at the bottom of the disk body (10), the disk opening (11) is concave, and it is characterized in that: The inner wall of the dish mouth (11) is provided with radial air guide grooves (111) opened from the center of the dish mouth (11) towards the position close to the outer edge of the dish mouth (11). The inner wall of the dish mouth (11) is further provided with a circumferential air guide groove (112) which is concentric with the center of the dish mouth (11), opened along its circumferential direction and connected to each radial air guide groove (111). An installation part (12) is arranged at the top of the dish body (10). A differential pressure pipe (13) is arranged at the top of the dish body (10). A differential pressure channel (131) communicated with the radial air guide groove (111) or / and the circumferential air guide groove (112) is arranged in the differential pressure pipe (13). One end of the differential pressure pipe (13) facing away from the bottom of the dish body (10) is provided with a closing seam (132). The seam wall of the closing seam (132) includes two states of separation and fitting. When the seam wall of the closing seam (132) is in the separated state, the differential pressure channel (131) is in an open state.

2. The one-way suction cup according to claim 1, characterized in that: The differential pressure pipe (13) is arranged to extend outwards at the connection with the dish body (10), so that a compression section (133) is formed at the pipe wall position.

3. The one-way suction cup according to claim 1 or 2, characterized in that: The aspect ratio of the length to the width of the cross section of the differential pressure pipe (13) is greater than 1:1, and the opening direction of the closing seam (132) is the same as the long direction of the cross section of the differential pressure pipe (13).

4. The one-way suction cup according to claim 3, characterized in that: The cross section of the differential pressure channel (131) is offset from the cross section of the differential pressure pipe (13).

5. The one-way suction cup according to claim 1, wherein: The circumferential air guide grooves (112) are arranged in a plurality of numbers and are offset from each other with the center of the dish mouth (11) as the reference.

6. The one-way suction cup according to claim 1, characterized in that: A sealing ring (113) is arranged on one side of the outer edge of the dish mouth (11) facing away from the top of the dish body (10).

7. The one-way suction cup according to claim 1, characterized in that: Pulling ears (114) are arranged at the side wall position of the outer edge of the dish mouth (11).

8. A unidirectional suction cup according to claim 1 or 7, characterized in that: The dish body (10) is further provided with a pressure relief hole (14) located in the dish mouth (11) and penetrating through its bottom and top; or a plug hole (141) with an inner diameter larger than the inner diameter of the pressure relief hole is arranged at one end of the pressure relief hole (14) facing the dish mouth (11).

9. The one-way suction cup according to claim 8, characterized in that: One end of the pressure relief hole (14) facing the dish mouth (11) is opened through the radial air guide groove (111) and / or the circumferential air guide groove (112).

10. A unidirectional suction cup according to claim 1, characterized in that: The installation part (12) is an installation bracket (15) located at the top of the dish body (10) and embedded in the dish body (10), and installation holes (151) are arranged on the installation bracket (15).

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