CN115303925A

CN115303925A - Vacuum chuck

Info

Publication number: CN115303925A
Application number: CN202211039512.XA
Authority: CN
Inventors: 刘杏芳
Original assignee: Shenzhen Tuoyuanfeng Technology Co ltd
Current assignee: Shenzhen Tuoyuanfeng Technology Co ltd
Priority date: 2022-08-29
Filing date: 2022-08-29
Publication date: 2022-11-08
Anticipated expiration: 2042-08-29
Also published as: CN115303925B

Abstract

The invention relates to the technical field of vacuum suckers, and discloses a vacuum sucker which comprises an inner sucker, wherein an outer sucker is sleeved on the outer side of the inner sucker, an inner suction pipe connected with external negative pressure equipment is arranged at the top of the inner sucker, an outer suction pipe connected with the external negative pressure equipment is arranged at the top of the outer sucker, under the condition that the same negative pressure equipment is externally connected, the suction force transmitted by the inner suction pipe is smaller than that transmitted by the outer suction pipe, reinforcing blocks are arranged on the inner walls of the inner sucker and the outer sucker, and the reinforcing blocks are distributed circumferentially. This vacuum chuck, through setting up double-deck vacuum chuck, less interior sucking disc adsorbs earlier on the work piece, because the negative pressure that interior sucking disc produced is less, can not lead to sheet metal deformation, and the structural strength of sheet metal is strengthened to interior sucking disc simultaneously, when making outer sucking disc produce great negative pressure, also can not produce deformation, and through the setting of double suction cups, can improve the power of grabbing to reached and to have prevented that the sheet metal from snatching deformation, snatch stable effect.

Description

Vacuum chuck

Technical Field

The invention relates to the technical field of vacuum chucks, in particular to a vacuum chuck.

Background

Generally, the vacuum chuck is the cheapest method for grabbing products, the vacuum chucks are various in variety, the chucks made of rubber can be operated at high temperature, and the chucks made of silicon rubber are very suitable for grabbing products with rough surfaces; suction cups made of polyurethane are very durable.

The conventional vacuum chuck simply utilizes negative pressure to grab a workpiece, and when a large sheet is grabbed, the vacuum chuck needs to generate large negative pressure in order to ensure enough grabbing force, so that the sheet is easy to deform, and the grabbing stability is poor.

Disclosure of Invention

In order to realize the purposes of preventing the sheet from being grabbed and deformed, stably grabbing, having a compact structure and being convenient to use, the invention is realized by the following technical scheme: a vacuum sucker comprises an inner sucker, wherein an outer sucker is sleeved on the outer side of the inner sucker, an inner suction pipe connected with external negative pressure equipment is arranged at the top of the inner sucker, and an outer suction pipe connected with the external negative pressure equipment is arranged at the top of the outer sucker;

under the condition of being externally connected with the same negative pressure equipment, the suction force transmitted by the inner suction pipe is smaller than that transmitted by the outer suction pipe.

Preferably, a first piston suction plate is slidably connected inside the inner suction pipe, a first decompression hole is formed in the bottom of the inner suction pipe, the radius of the first decompression hole is smaller than the inner diameter of the inner suction pipe, a first vacuum piston is fixedly connected to the bottom of the first piston suction plate through a piston rod, the first vacuum piston is slidably connected inside the first decompression hole in a sealing mode, and a first decompression spring is arranged between the piston rod and the inner wall of the inner suction pipe.

Preferably, the inside sliding connection of outer straw has the second piston suction disc, the second pressure relief vent has been seted up to the bottom of outer straw, the radius of second pressure relief vent is less than the internal diameter of outer straw, the radius of second pressure relief vent is greater than the radius of first pressure relief vent, the bottom fixedly connected with of second piston suction disc seals the second vacuum piston of sliding connection in the inside of second pressure relief vent, be provided with second relief spring between second piston suction disc and the second pressure relief vent inner wall, second relief spring's elasticity is less than first relief spring's elasticity.

Preferably, outer sucking disc, outer straw are provided with two sets ofly at least, are the lantern ring setting, outer sucking disc outwards increases in proper order, the inside second pressure release hole radius of outer sucking disc increases along with the increase of outer sucking disc.

Preferably, a transmission cavity is formed in the inner suction pipe, a pressing plate fixedly connected with the first piston suction plate is connected to the inside of the transmission cavity in a sliding mode, a pressing bag is arranged at the top of the pressing plate, an air valve is arranged at the top of the pressing bag, the air valve is fixedly connected to the inner wall of the inner suction pipe, a cleaning air pipe is inserted into the outer side of the air valve in a plugging mode, and the cleaning air pipe is distributed along the outer side of the inner suction disc.

Preferably, the edge of the outer sucker is provided with a flexible sealing lip.

Preferably, the outer side of the outer sucker is fixedly connected with a transmission rod, the transmission rod is circumferentially distributed on the outer side of the outer sucker, a sliding hole is formed in the outer side of the transmission rod, an ejector rod capable of automatically stretching is slidably connected inside the sliding hole, and the bottom of the ejector rod is connected with the edge of the flexible sealing lip.

Preferably, an air pressure cavity is formed in the transmission rod, the air pressure cavity is connected with the outer suction pipe through an air pipe, a piston block is connected in the air pressure cavity in a sliding mode, the piston block is connected with the ejector rod in a transmission mode through a transmission rope, a fixed pulley capable of changing the transmission direction of the transmission rope is installed on the inner wall of the sliding hole in a rotating mode, and a tension spring is arranged between the ejector rod and the inner wall of the sliding hole.

Preferably, the inner walls of the inner sucker and the outer sucker are provided with reinforcing blocks, and the reinforcing blocks are distributed circumferentially.

Compared with the prior art, the invention has the following beneficial effects:

1. this vacuum chuck, through setting up double-deck vacuum chuck, less interior sucking disc adsorbs earlier on the work piece, because the negative pressure that interior sucking disc produced is less, can not lead to sheet metal deformation, the structural strength of sheet metal is strengthened to interior sucking disc simultaneously, when making outer sucking disc produce great negative pressure, can not produce deformation yet, and through the setting of double-sucking disc, can improve the power of grabbing to reached and prevented that the sheet metal from snatching deformation, snatch stable effect.

2. This vacuum chuck through the setting of inner suction pipe and outer straw, makes inner suction cup and outer straw can be external on the same negative pressure equipment, and can produce the suction of equidimension not, need not external a plurality of negative pressure equipment to compact structure, convenient to use's effect has been reached.

Drawings

FIG. 1 is a schematic bottom isometric view of the present invention;

FIG. 2 is an upper axial schematic view of the present invention;

FIG. 3 is a schematic top view of the present invention;

FIG. 4 isbase:Sub>A schematic cross-sectional view A-A of FIG. 3 according to the present invention;

FIG. 5 is a schematic internal suction diagram of the present invention;

FIG. 6 is a schematic cross-sectional view of an inner cup in accordance with the present invention;

fig. 7 is a schematic cross-sectional view of a transmission rod of the present invention.

In the figure: 1. an inner sucker; 2. an outer sucker; 3. an inner suction pipe; 4. an outer straw; 5. a reinforcing block; 6. a first piston suction plate; 7. a first pressure relief vent; 8. a first vacuum piston; 9. a second piston suction plate; 10. a second pressure relief vent; 11. a second vacuum piston; 12. a second relief spring; 13. pressing a plate; 14. a first relief spring; 15. pressing a bag; 16. an air valve; 17. cleaning the trachea; 18. a flexible sealing lip; 19. a transmission rod; 20. a pneumatic chamber; 21. a piston block; 22. a slide hole; 23. a top rod; 24. a tension spring; 25. a driving rope; 26. and a fixed pulley.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.

An example of the vacuum chuck is as follows:

referring to fig. 1-7, a vacuum chuck includes an inner chuck 1, an outer chuck 2 is sleeved outside the inner chuck 1, an inner suction pipe 3 connected with an external negative pressure device is disposed at the top of the inner chuck 1, and an outer suction pipe 4 connected with an external negative pressure device is disposed at the top of the outer chuck 2;

under the condition of external connection with the same negative pressure equipment, the suction force transmitted by the inner suction pipe 3 is smaller than that transmitted by the outer suction pipe 4.

When the sheet metal part grabbing device is used, when a grabbing piece is a sheet metal part, the outer sucker 2 and the inner sucker 1 are both placed on a sheet metal, at the moment, external negative pressure equipment is started, the inner sucker 1 generates negative pressure through the inner suction pipe 3, the inner sucker 1 is adsorbed on the sheet metal under the action of external atmospheric pressure, and the sheet metal cannot be deformed due to the fact that the adsorption area of the inner sucker 1 is small and the suction force generated under the action of the inner sucker 3 is small, and preliminary adsorption of the sheet metal is completed;

then the outer sucker 2 generates negative pressure through the outer sucker 4, the outer sucker 2 is adsorbed on the thin plate under the action of the external atmospheric pressure, the outer sucker 2 is large, and the suction force generated through the outer sucker 4 is large, so that the device has enough gripping force to grip the thin plate, meanwhile, the inner sucker 1 is increased, the strength of the thin plate positioned in the outer sucker 2 is increased, the thin plate cannot be deformed due to the large suction force generated by the outer sucker 2, and the gripping is stable;

meanwhile, the inner suction pipe 3 and the outer suction pipe 4 are connected to the same negative pressure equipment, the initial negative pressure of the negative pressure equipment is the same, when the negative pressure passes through the inner suction pipe 3, the suction force generated by the negative pressure is reduced, a plurality of groups of negative pressure equipment do not need to be connected externally, and the negative pressure equipment is convenient to use and compact in structure.

When the grabbing piece is a normal part, the outer suction pipe 4 is only connected with external negative pressure equipment, the inner suction pipe 3 is closed, and the part can be quickly grabbed only through the outer sucker 2, so that the use is convenient;

as shown in fig. 6, in some embodiments, a first piston suction plate 6 is slidably connected inside the inner suction pipe 3, a first pressure reduction hole 7 is formed in the bottom of the inner suction pipe 3, the radius of the first pressure reduction hole 7 is smaller than the inner diameter of the inner suction pipe 3, a first vacuum piston 8 is fixedly connected to the bottom of the first piston suction plate 6 through a piston rod, the first vacuum piston 8 is slidably connected inside the first pressure reduction hole 7 in a sealing manner, and a first pressure reduction spring 14 is arranged between the piston rod and the inner wall of the inner suction pipe 3.

The external negative pressure equipment enables the internal suction pipe 3 to generate negative pressure, the negative pressure drives the first piston suction plate 6 to ascend, the first piston suction plate 6 drives the first vacuum piston 8 to ascend through the piston rod, the first vacuum piston 8 generates suction through the first pressure reducing hole 7, the radius of the first pressure reducing hole 7 is smaller than the inner diameter of the internal suction pipe 3, the first pressure reducing hole 7 can reduce the negative pressure, meanwhile, the negative pressure is further reduced under the action of the elasticity of the first pressure reducing spring 14, and the negative pressure generated by the internal suction disc 1 is ensured to be smaller;

when the inner suction pipe 3 is disconnected with an external negative pressure device, the first pressure reducing spring 14 drives the first piston suction plate 6 and the first vacuum piston 8 to descend under the action of elastic force, the next use is not influenced, and meanwhile, the inner sucker 1 can be quickly separated from a workpiece, so that the use is convenient.

As shown in fig. 4, in some embodiments, a second piston suction plate 9 is slidably connected inside the outer suction pipe 4, a second pressure reduction hole 10 is formed in the bottom of the outer suction pipe 4, the radius of the second pressure reduction hole 10 is smaller than the inner diameter of the outer suction pipe 4, the radius of the second pressure reduction hole 10 is larger than the radius of the first pressure reduction hole 7, a second vacuum piston 11 is fixedly connected to the bottom of the second piston suction plate 9 and slidably connected inside the second pressure reduction hole 10 in a sealing manner, a second pressure reduction spring 12 is arranged between the second piston suction plate 9 and the inner wall of the second pressure reduction hole 10, and the elastic force of the second pressure reduction spring 12 is smaller than the elastic force of the first pressure reduction spring 14.

The external negative pressure equipment enables the external suction pipe 4 to generate negative pressure, the negative pressure drives the second piston suction plate 9, the second piston suction plate 9 drives the second vacuum piston 11, the second vacuum piston 11 enables the second pressure reducing hole 10 to generate suction, the second pressure reducing hole 10 enables the external suction disc 2 to be adsorbed on a workpiece, when the external suction pipe 4 is disconnected with the external negative pressure equipment, the second pressure reducing spring 12 drives the second piston suction plate 9 and the second vacuum piston 11 to descend under the action of elastic force, the next use is not influenced, meanwhile, the external suction disc 2 can be quickly separated from the workpiece, and the use is convenient;

meanwhile, as the radius of the second pressure relief hole 10 is larger than that of the first pressure relief hole 7, the suction force generated by the outer sucker 2 is larger than that generated by the inner sucker 1.

As shown in fig. 4, in some embodiments, at least two groups of the outer suction cups 2 and the outer suction pipes 4 are arranged, and are arranged in a lantern ring manner, the outer suction cups 2 sequentially increase outwards, and the radius of the second pressure reducing hole 10 inside the outer suction pipe 4 increases with the increase of the outer suction cups 2.

According to the size of the grabbed thin plate, different numbers of outer suction discs 2 and outer suction pipes 4 are installed, so that the whole thin plate is stably stressed during grabbing, the phenomenon that the edge is bent downwards is avoided, and the grabbing stability is further improved;

because the radius of second pressure release hole 10 is less than the internal diameter of outer suction pipe 4, the biggest negative pressure radius of outer suction pipe 4 is its internal diameter, only need be according to the size of outer sucking disc 2 this moment, comes the size of corresponding regulation second pressure release hole 10, can produce different negative pressure suction to different outer sucking discs 2, snatchs stably.

As shown in fig. 6, in some embodiments, a transmission cavity is formed inside the inner suction pipe 3, a pressing plate 13 fixedly connected with the first piston suction plate 6 is slidably connected inside the transmission cavity, a pressing bag 15 is arranged on the top of the pressing plate 13, an air valve 16 is arranged on the top of the pressing bag 15, the air valve 16 is fixedly connected to the inner wall of the inner suction pipe 3, a cleaning air pipe 17 is inserted outside the air valve 16, and the cleaning air pipe 17 is distributed along the outside of the inner suction cup 1.

An external negative pressure device enables an inner suction pipe 3 to generate negative pressure, the inner suction pipe 3 enables an inner suction disc 1 to generate negative pressure through a first piston suction plate 6 and a first vacuum piston 8, meanwhile, the first piston suction plate 6 drives a pressing plate 13 to ascend along a transmission cavity, the pressing plate 13 extrudes a pressing bag 15, the pressing bag 15 discharges air stored inside through an air valve 16 and a cleaning air pipe 17, the air is ejected outwards from the outer edge of the inner suction disc 1 under the guiding action of the cleaning air pipe 17, the air cleans the area to be adsorbed by an outer suction disc 2, and the outer suction disc 2 is prevented from being influenced by impurities on a thin plate and is stably adsorbed due to the large adsorption area of the outer suction disc 2;

when the outer sucker 2 generates suction, because the cleaning air pipe 17 is positioned in the outer sucker 2 and the inner part of the outer sucker 2 is vacuum, the outer sucker 2 generates suction on the pressing bag 15 through the cleaning air pipe 17 and the air valve 16, the pressing bag 15 gives upward pull to the pressing plate 13, the pressing plate 13 gives upward pull to the first vacuum piston 8, and the first vacuum piston 8 enables the inner sucker 1 to be adsorbed more tightly through the first decompression hole 7, so that the grabbing is stable;

when the inner suction pipe 3 leaks air from the joint of the negative pressure equipment, the outer suction cup 2 generates suction force on the pressing bag 15 through the cleaning air pipe 17 and the air valve 16, the pressing bag 15 gives upward pulling force to the pressing plate 13, the pressing plate 13 gives upward pulling force to the first vacuum piston 8, the first vacuum piston 8 cannot descend under the action of the first decompression spring 14, the inner suction cup 1 cannot be separated from the thin plate, the grabbing force cannot be influenced, and the thin plate cannot fall off.

As shown in fig. 2, in some embodiments, the edge of the outer suction plate 2 is provided with a flexible sealing lip 18.

It is inseparabler to enable outer sucking disc 2 and work piece absorption through flexible seal lip 18, snatchs stably, when interior sucking disc 1 adsorbs simultaneously, turns over a flexible seal lip 18 to last, when making interior sucking disc 1 adsorb, outer sucking disc 2 not with the sheet metal contact, clean trachea 17 can blow away the impurity that outer sucking disc 2 adsorbed the position more fast, clean efficient, when outer sucking disc 2 need adsorb, turn over a flexible seal lip 18 can, convenient to use.

As shown in fig. 2, in some embodiments, a transmission rod 19 is fixedly connected to the outer side of the outer suction cup 2, the transmission rod 19 is circumferentially distributed on the outer side of the outer suction cup 2, a sliding hole 22 is formed in the outer side of the transmission rod 19, a push rod 23 capable of automatically extending and retracting is slidably connected to the inside of the sliding hole 22, and the bottom of the push rod 23 is connected to the edge of the flexible sealing lip 18.

The transmission rod 19 is arranged on the outer circumference of the outer sucker 2, so that the structural strength of the outer sucker 2 can be improved, and when a plurality of groups of outer suckers 2 are used, the inner outer sucker 2 cannot be deformed due to overlarge suction force, and the grabbing is stable;

when the inner sucker 1 is sucked, the ejector rod 23 is controlled to slide towards the inside of the sliding hole 22, the ejector rod 23 drives the flexible sealing lip 18 to be turned upwards, when the outer sucker 2 needs to be sucked, the ejector rod 23 is controlled to descend, the ejector rod 23 enables the flexible sealing lip 18 to be turned downwards, manual turning is not needed, and the use is convenient.

As shown in fig. 7, in some embodiments, an air pressure chamber 20 is opened inside the transmission rod 19, the air pressure chamber 20 is connected to the outer suction pipe 4 through an air pipe, a piston block 21 is slidably connected inside the air pressure chamber 20, the piston block 21 is in transmission connection with a push rod 23 through a transmission rope 25, a fixed pulley 26 capable of changing the transmission direction of the transmission rope 25 is rotatably installed on the inner wall of the sliding hole 22, and a tension spring 24 is disposed between the push rod 23 and the inner wall of the sliding hole 22.

The inner part of the outer suction pipe 4 generates negative pressure, the outer suction pipe 4 enables the air pressure cavity 20 to generate negative pressure through an air pipe, the air pressure drives the piston block 21 to slide upwards, the piston block 21 drives the ejector rod 23 to descend through the transmission rope 25 and the fixed pulley 26, the ejector rod 23 drives the flexible sealing lip 18 to be turned downwards, and the outer suction disc 2 can be normally used;

when the outer sucker 2 is not used, the tension spring 24 drives the ejector rod 23 to ascend, the ejector rod 23 drives the flexible sealing lip 18 to turn over upwards, the cleanness of the cleaning air pipe 17 is not influenced, meanwhile, the ejector rod 23 drives the piston block 21 to reset through the transmission rope 25 and the fixed pulley 26, the next use is not influenced, an extra driving device is not needed, the flexible sealing lip 18 can be enabled to turn over automatically, the structure is compact, and the use is convenient.

As shown in fig. 1, in some embodiments, the inner suction plate 1 and the outer suction plate 2 are provided with reinforcing blocks 5 on the inner wall, and the reinforcing blocks 5 are distributed circumferentially.

When interior sucking disc 1 or outer sucking disc 2 adsorb, boss 5 supports on the sheet metal surface, supports the sheet metal, can further prevent sheet metal deformation, and boss 5 can increase the intensity of interior sucking disc 1 and outer sucking disc 2 simultaneously, prevents that interior sucking disc 1 or outer sucking disc 2 from producing deformation under its outside cup joint sucking, stable in structure.

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

Claims

1. A vacuum chuck comprising an inner chuck (1), characterized in that: an outer sucker (2) is sleeved on the outer side of the inner sucker (1), an inner suction pipe (3) connected with external negative pressure equipment is arranged at the top of the inner sucker (1), and an outer suction pipe (4) connected with the external negative pressure equipment is arranged at the top of the outer sucker (2);

under the condition of being externally connected with the same negative pressure equipment, the suction force transmitted by the inner suction pipe (3) is smaller than the suction force transmitted by the outer suction pipe (4).

2. The vacuum chuck as set forth in claim 1, wherein: the inside sliding connection of interior suction pipe (3) has first piston suction disc (6), first pressure relief vent (7) have been seted up to the bottom of interior suction pipe (3), the radius of first pressure relief vent (7) is less than the internal diameter of interior suction pipe (3), the bottom of first piston suction disc (6) is through the first vacuum piston (8) of piston rod fixedly connected with, sealed sliding connection of first vacuum piston (8) is inside first pressure relief vent (7), be provided with first decompression spring (14) between piston rod and interior suction pipe (3) inner wall.

3. The vacuum chuck as set forth in claim 2, wherein: the inside sliding connection of outer straw (4) has second piston suction disc (9), second pressure relief vent (10) have been seted up to the bottom of outer straw (4), the radius of second pressure relief vent (10) is less than the internal diameter of outer straw (4), the radius of second pressure relief vent (10) is greater than the radius of first pressure relief vent (7), the bottom fixedly connected with of second piston suction disc (9) seals second vacuum piston (11) of sliding connection in second pressure relief vent (10) inside, be provided with second relief spring (12) between second piston suction disc (9) and second pressure relief vent (10) inner wall, the elasticity of second relief spring (12) is less than the elasticity of first relief spring (14).

4. The vacuum chuck as set forth in claim 3, wherein: outer sucking disc (2), outer straw (4) are provided with two sets ofly at least, are the lantern ring setting, outer sucking disc (2) outwards increase in proper order, the inside second pressure release hole (10) radius of outer straw (4) increases along with the increase of outer sucking disc (2).

5. The vacuum chuck as set forth in claim 2, wherein: the utility model discloses a suction tube, including interior sucking disc (3), transmission chamber has been seted up to the inside of interior sucking tube (3), the inside sliding connection in transmission chamber has clamp plate (13) with first piston suction plate (6) fixed connection, the top of clamp plate (13) is provided with presses bag (15), the top of pressing bag (15) is provided with pneumatic valve (16), pneumatic valve (16) fixed connection is at the inner wall of interior sucking tube (3), peg graft in the outside of pneumatic valve (16) has clean trachea (17), clean trachea (17) distribute along interior sucking disc (1) outside.

6. The vacuum chuck as set forth in claim 5, wherein: the edge of the outer sucker (2) is provided with a flexible sealing lip (18).

7. The vacuum chuck as set forth in claim 6, wherein: the outer side of the outer sucker (2) is fixedly connected with a transmission rod (19), the transmission rod (19) is circumferentially distributed on the outer side of the outer sucker (2), a sliding hole (22) is formed in the outer side of the transmission rod (19), an ejector rod (23) capable of automatically stretching is connected to the inner portion of the sliding hole (22) in a sliding mode, and the bottom of the ejector rod (23) is connected with the edge of the flexible sealing lip (18).

8. The vacuum chuck as set forth in claim 7, wherein: atmospheric pressure chamber (20) have been seted up to the inside of transfer line (19), atmospheric pressure chamber (20) through the trachea with outer straw (4) are connected, the inside sliding connection of atmospheric pressure chamber (20) has piston block (21), piston block (21) through driving rope (25) with ejector pin (23) transmission is connected, the inner wall of slide opening (22) rotates installs fixed pulley (26) that can change driving rope (25) transmission direction, ejector pin (23) with be provided with extension spring (24) between the inner wall of slide opening (22).

9. The vacuum chuck as set forth in any one of claims 1 to 8, wherein: the inner walls of the inner sucker (1) and the outer sucker (2) are provided with reinforcing blocks (5), and the reinforcing blocks (5) are distributed circumferentially.