TWI540029B - Vacuum sucker - Google Patents

Description

Vacuum chuck

The invention provides a vacuum suction cup, in particular to a suction cup which is used for vacuum attracting a preset object, and the inlet passage of the base below the seat body is provided with a reciprocating displacement pressure valve piece, which is reduced by the central perforation of the pressure valve piece. Area to increase vacuum suction and reduce vacuum loss due to failure to adsorb to preset objects.

According to the vacuum suction cup, the vacuum suction cup technology is mainly used in the processing or transportation of the current industry. The vacuum suction cup technology can be mainly divided into two types, one is a contact vacuum suction cup, and the other is a non-contact vacuum suction cup. Generally speaking, relatively Common and applicable applications are contact vacuum chuck technology.

In the case of a contact vacuum chuck, the principle is to directly apply a negative pressure directly at the suction port of the suction cup, and generate suction at the air outlet of the suction cup to achieve the function of adsorbing the workpiece, but the adsorption surface of the suction cup must be covered in the physical range or it will cause Vacuum loss cannot pick up the workpiece.

Furthermore, the fixing method of the suction cup is generally based on the size of the suction surface of the suction cup to make a fixed frame. The number of suction cups is limited, and it cannot be automatically and randomly adjusted, and must be manually adjusted to increase the inconvenience in operation.

In the case of a non-contact type suction cup, the suction surface is still slightly spaced from the surface of the workpiece when the workpiece is sucked, so that the workpiece cannot be closely sucked, when the suction cup moves or rotates at a high speed. The inertial force generated by the acceleration will pull out the workpiece, and the suction surface of the non-contact suction cup is generally made of a hard material, such as engineering plastic or aluminum alloy, and because it has a distance from the adsorption workpiece, in order to enhance the suction force, Set a softer cushion, which will cause scratches on the workpiece if the suction surface of the suction cup contacts the workpiece.

There are still some shortcomings in the above-mentioned vacuum suction cups to be improved, so how to solve the above problems makes the contact vacuum suction cups have a wider application level, which is the goal that the inventors and those engaged in the industry desire to improve.

Therefore, in view of the above-mentioned shortcomings, the inventors have collected relevant materials, and through multi-party evaluation and consideration, and through years of experience in the industry, through continuous trial and modification, the invention patents of such vacuum chucks were designed.

The main purpose of the present invention is that when the vacuum chuck is used, the pressurized valve piece is displaced by the air, and the inlet passage portion is reduced to the area where only the central portion of the pressure valve plate is perforated, thereby allowing the air flow. The area of the penetration is reduced to increase the vacuum suction, so that the preset object is stably attracted by the vacuum suction cup, and the preset object does not fall when moving at high speed.

A secondary object of the present invention is to use a pressure valve plate to abut against a stop surface between the lifting space and the connecting passage, so that the communication between the lifting space and the connecting passage is reduced to the perforation of only the pressurized valve plate. The air entering the air trough can be reduced. When the vacuum suction cup attracts a plurality of hollow places or irregular shaped objects, the speed of the vacuum suction device excluding air is greater than the speed at which the air passes through the perforations into the air trough, so the gas The vacuum of the groove reduces the loss, which in turn increases the vacuum suction cup and improves the stability of the vacuum suction.

Another object of the present invention is to provide a contact pad on the bottom surface of the base to contact The cushion is made of a soft foaming material such as rubber or silicone rubber, and is used as a separation between the base and the preset object to prevent scratching due to friction between the two, and the suction holes are not connected to each other. Therefore, each attracting channel forms the effect of independent suction cup, and can avoid the situation of vacuum breaking, thereby improving the stability of processing or transportation.

Another object of the present invention is to provide a filter screen in the air inlet passage of the base to filter out minute foreign matter, so as to prevent foreign matter from entering the lifting space, the connecting passage or the air groove to block, and the top surface of the seat body has a cleaning slot and The locking screw can be removed, and the cleaning screw can be removed and the positive air blow is applied by the cleaning slot, so that the blocked foreign matter can be blown out of the vacuum suction cup, thereby improving the stability of use, reducing the number of maintenance and quickly eliminating the blocking effect. .

A further object of the present invention is to provide at least four fixing holes on the top surface of the base body and the periphery thereof, so that the preset carrier can be aligned with the center of the vacuum chuck and form a stable fixed position, thereby achieving accurate positioning. .

1‧‧‧ body

10‧‧‧ gas trough

11‧‧‧through slot

12‧‧‧Vacuum suction device

121‧‧‧ flow path

1210‧‧‧through hole

1211‧‧‧Expanded runner

1212‧‧‧Intake runner

1213‧‧‧Exhaust runner

122‧‧‧Docking components

13‧‧‧ cleaning notch

131‧‧‧ Cleaning screws

14‧‧‧ Fixed Department

15‧‧‧Fixed holes

2‧‧‧Base

21‧‧‧Inlet passage

211‧‧‧

212‧‧‧ Lifting space

213‧‧‧ stop surface

214‧‧‧Connected channel

22‧‧‧ Filter

23‧‧‧Pressure valve

231‧‧‧Perforation

24‧‧‧ positioning ring

25‧‧‧Fixed components

26‧‧‧Sealing washer

3‧‧‧Contact cushion

31‧‧‧Adsorption bottom

32‧‧‧Attracting the tunnel

4‧‧‧ Preset objects

The first figure is a three-dimensional appearance of the present invention.

The second figure is another perspective view of the present invention.

The third figure is a side cross-sectional view of the invention when not in use.

The fourth figure is a partial enlarged view of the portion A of the third drawing of the present invention.

Figure 5 is a side cross-sectional view of the invention as it is used.

Figure 6 is a partial enlarged view of a portion B of the fifth drawing of the present invention.

Figure 7 is another cross-sectional view of the present invention.

In order to achieve the above objects and effects, the technical means and the configuration of the present invention will be described in detail with reference to the preferred embodiments of the present invention.

Please refer to the first, second, third, fourth and seventh figures. As can be clearly seen from the figure, it comprises a seat body 1, a base 2 and a contact cushion 3, wherein: The bottom of the base body 1 is recessed with a gas groove 10, and the top surface of the base body 1 is provided with a plurality of through grooves 11 communicating with the gas groove 10, and then a vacuum suction device 12 is installed at the plurality of through grooves 11, and the top of the seat body 1 is provided. The cleaning slot 131 is connected to the air slot 10, and the cleaning screw 131 is locked to the cleaning slot 13. The fixing portion 14 is further disposed at the center of the top surface of the base body 1, and at least four are arranged around the fixing portion 14. Fixing hole 15.

The base 2 is mounted on the bottom of the base body 1. The bottom surface of the base 2 is recessed with a plurality of air inlet passages 21 communicating with the air groove 10. The top portion of each air inlet passage 21 is provided with a stepped portion 211, and then The lifting portion 212 is recessed on the inner side of the portion 211, and the top of the lifting space 212 is provided with a retracting stop surface 213. The inner side of the stopping surface 213 is further provided with an engaging passage 214 connected to the air groove 10, and is inflated. The channel 21 is provided with a filter 22 having an outer diameter larger than the inner diameter of the lifting space 212 and abutting against the step 211. The outer space of the lifting space 212 is smaller than the inner diameter of the lifting space 212 and larger than the inner diameter of the connecting channel 214. The displacement of the pressure valve piece 23, the center of the pressure valve piece 23 is further provided with a through hole 231 having an inner diameter smaller than the inner diameter of the engagement channel 214, and the air inlet channel 21 is further provided with a positioning ring 24 for resisting the filter screen 22 to form a positioning. .

The contact pad 3 is correspondingly disposed on the bottom surface of the base 2, and has an adsorption bottom surface 31 contacting the preset object 4 under the contact pad 3, and the adsorption bottom surface 31 is provided with the pair facing upward. The plurality of suction holes 32 that are connected to the respective intake passages 21 are being communicated.

The base 2 is provided with a plurality of fixing elements 25 at the outer side of the air box 10 of the right seat body 1 , whereby the base 2 is locked to the seat body 1 , and the base 2 contacts the wall surface of the seat body 1 outside the plurality of air inlet passages 21 . A sealing gasket 26 is provided. The seat body 1 or the base 2 is recessed with a recess to receive and press the sealing gasket 26 to form a sealed state. The sealing gasket 26 can also be disposed at the joint of the seat body 1 and the vacuum suction device 12, but the fixing is fixed. And the technology of sealing is a well-known technique, and this detail constitutes a non-inventive point of the invention, and will not be described again.

Please refer to the first, second, third, fourth, fifth, sixth and seventh figures. It can be clearly seen from the figure that when the vacuum chuck is not used (the vacuum suction device 12 is not activated), the pressure valve piece 23 is dropped. Abutting against the upper surface of the filter screen 22, the air can flow through the gap between the outer peripheral edge of the pressure valve plate 23 and the inner wall surface of the lifting space 212. When the vacuum chuck is used, the contact cushion 3 is firstly resisted. Presetting the upper surface of the object 4, the vacuum suction device 12 is further activated to discharge the air in the air tank 10 to the outside. At this time, the air of the air inlet passage 21, the lifting space 212 and the connecting passage 214 is moved toward the air tank 10, and then The pressure valve piece 23 is pushed by the air, and is displaced upward against the upper surface of the screen 22 to abut against the stop surface 213, so that the communication between the lifting space 212 and the connecting passage 214 is reduced to only The area of the central perforation 231 of the pressurized valve piece 23 is left. At this time, the air inside the air groove 10 of the seat body 1 is in a vacuum state, and only the through hole 231 of the pressure valve piece 23 is a penetration portion, thereby allowing The area of the airflow penetration is reduced to increase the vacuum suction, so that the preset object 4 is vacuumed. A firm base to attract, default object moving at high speed 4 will not be thrown off.

Since the air inlet passage 21 of the base 2 and the suction passage 32 of the contact cushion 3 are of a perforated type, instead of the large-area contact type of the general rubber suction cup, the fixed base 2 is fixed. The number of suction points can be increased under the area. As shown in the figure, 156 air inlet passages 21 are provided on the circular surface of the base 2 with a diameter of 141 mm, compared with 4, 8 or 16 suction cups of the general contact vacuum suction cup. In order to install the same number of suction cups as the present invention, the area thereof needs to be increased by several tens of times compared with the present invention. Therefore, the present invention increases the number of suction cups under the area of the fixed frame to increase the probability of adsorbing the solid area, and thus is not The portion of the predetermined object 4 is hollowed out to affect the adsorption force. The area size and the number of holes in the above embodiment are merely illustrative and are not intended to limit the scope of the invention.

Furthermore, when the vacuum chuck is used to attract a predetermined object 4 having a plurality of hollows or irregular shapes (there are many precision objects in order to reduce the volume or combine with other objects into one product, often in the precision object itself. If a large area is hollowed out, the partial plurality of suction holes 32 contacting the cushion 3 are aligned with the hollow, and the suction hole 32 cannot be sealed at this time, so that after the vacuum suction device 12 is started, the external air passes through the suction hole sequentially. 32. The air inlet passage 21, the lifting space 212, and the connecting passage 214 enter the air tank 10, but since the communication between the lifting space 212 and the connecting passage 214 is reduced to only the through hole 231 of the pressing valve piece 23, the reduction can be reduced. The air entering the air tank 10, and the speed of the vacuum suction device 12 excluding the air is greater than the speed of entering the air tank 10 through the through holes 231 of the plurality of pressure valve sheets 23, so that the vacuum degree of the air tank 10 can reduce the loss, thereby allowing Vacuum chucks increase the range of use and enhance the stability of vacuum suction.

The contact pad 3 is made of a soft foaming material such as rubber or silicone rubber, and the suction holes 32 are not connected to each other. Therefore, the outside air can only enter the air groove 10 of the seat body 1 through the suction hole 32, not only Each of the suction channels 32 forms the effect of an independent suction cup, and reduces the loss of vacuum when the physical object is not adsorbed; and, because the contact cushion is utilized 3 As the isolation between the base 2 and the preset object 4, the suction bottom surface 31 of the bottom of the contact pad 3 contacts the surface of the preset object 4, and since the contact pad 3 is a soft foam material, the preset object 4 is not scratched. The surface, in turn, can improve the stability of processing or transportation; in addition, since the contact cushion 3 is a soft foaming material and the suction force generated by the vacuum chuck is large, the contact cushion 3 contacts the preset object 4 and is vacuum-attracted. The contact pad 3 is elastically deformable, so that the contact pad 3 can surely contact the surface of the preset object 4, and even if the surface of the preset object 4 is uneven, the vacuum cup can surely attract the preset object 4, And the vacuum chuck can attract the preset object 4 without adjusting the position.

The air inlet passage 21 of the base 2 is provided with a filter screen 22, and the filter net 22 can filter out minute foreign matter to prevent foreign matter from entering the lifting space 212, the connecting passage 214 or the air tank 10 to cause blockage, thereby improving The stability of the use is reduced and the maintenance is reduced; in addition, the top surface of the base body 1 has a cleaning notch 13 and a locking cleaning screw 131 thereof. When the blockage occurs, the cleaning screw 131 can be removed and the cleaning slot 13 faces the air groove 10 By applying a positive pressure blow, the blocked foreign matter can be blown out of the vacuum chuck, and the elimination action is simple and convenient, so that the problem of rapid elimination can be achieved.

The top surface of the base body 1 has a fixing portion 14 and a periphery thereof, and at least four fixing holes 15 are provided. The preset carrier (not shown) is assembled with the fixing portion 14 and then locked to the at least four fixing holes 15 . Forming a stable fixed position allows the center of the preset carrier to be aligned with the center of the vacuum chuck to achieve precise positioning.

Please refer to the first, second, third, fourth, fifth, sixth and seventh figures. It can be clearly seen from the figure that the embodiment of the vacuum suction device 12 of the base 1 can be an external vacuum generator. Or vacuum motor, directly emptying the gas tank 10 through a vacuum generator or a vacuum motor The gas extraction can have the effect of vacuum suction, but since the vacuum generator and the vacuum motor need to be additionally arranged and costly, another embodiment of the vacuum suction device 12 has at least one of the air cells 10 in the seat body 1. The U-shaped flow channel 121 has a U-shaped flow channel 121 having a plurality of through holes 1210 connected to the gas groove 10, and the two ends of the U-shaped flow channel 121 are respectively connected to the through grooves 11 of the base body 1 and a general air compressor (in the figure) Not shown), the air is driven into the U-shaped flow passage 121 through the air compressor, and the air with a slow flow velocity in the air tank 10 is entered into the U-shaped flow passage 121 through the plurality of through holes 1210 by using the Bainuuli theorem. The air in the gas tank 10 is discharged to form a vacuum state, thereby allowing the manufacturer to use the vacuum chuck by using the air compressor generally available in the factory, so that the manufacturer does not need to purchase a vacuum generator or a vacuum motor, thereby saving costs.

Furthermore, the U-shaped flow passage 121 is at least one diverging flow passage 1211 having a horizontal arrangement, and the two ends of the diverging flow passage 1211 are respectively provided with an intake flow passage 1212 and an exhaust flow passage 1213 corresponding to the respective through grooves 11. The docking unit 11 is further provided with a docking component 122 extending to the outside of the seat body 1. The docking unit 122 corresponding to the air inlet runner 1212 is connected to the air compressor, so that the air of the air compressor is first driven into the air inlet. The flow path 1212 is further discharged to the outside through the diverging flow path 1211 and the exhaust flow path 1213. Since the diverging flow path 1211 has the effect of decelerating and supercharging, the air can be reliably pushed to the outside.

Therefore, the present invention is mainly designed for a vacuum chuck, and a vacuum suction device can be installed at a plurality of slots in the bottom air groove of the base body, and the base is recessed with a plurality of air inlet passages on the bottom surface, and the center air passage is provided in the air inlet passage. The pressure valve piece has only perforation communication between the lifting space and the connecting passage to reduce the vacuum suction force and reduce the air entering the air groove, and the air groove does not break the vacuum, so as to stably attract and move at high speed. The scope of use will not be degraded and the scope of use will be the main protection focus. However, the above description is only the preferred embodiment of the present invention, and thus is not limited to this. The invention is to be construed as being limited to the scope of the inventions and the equivalents of the inventions.

In summary, the above-mentioned vacuum chuck of the present invention can achieve its efficacy and purpose during implementation and operation. Therefore, the present invention is an invention with excellent practicability, and is an application for conforming to the invention patent, and submits an application according to law. I hope that the trial committee will grant this case as soon as possible to protect the hard work of the inventor. If there is any doubt in the audit committee, please do not hesitate to give instructions to the inventor to make every effort to cooperate.

1‧‧‧ body

10‧‧‧ gas trough

12‧‧‧Vacuum suction device

121‧‧‧ flow path

1210‧‧‧through hole

1211‧‧‧Expanded runner

14‧‧‧ Fixed Department

2‧‧‧Base

25‧‧‧Fixed components

26‧‧‧Sealing washer

3‧‧‧Contact cushion

31‧‧‧Adsorption bottom

32‧‧‧Attracting the tunnel

4‧‧‧ Preset objects

Claims (8)

A vacuum chuck comprises a base body, a base and a contact cushion, wherein: the bottom of the base body is recessed with a gas groove, the top surface of the seat body is provided with a plurality of through grooves connected to the air groove, and then installed at a plurality of slots There is a vacuum suction device; the base is installed on the bottom of the base body, and a plurality of air inlet passages are recessed in the bottom surface of the base, and a pressure valve piece is arranged in the air inlet passage, and the center of the pressure valve piece is further provided with a perforation. The pressure valve plate is displaced up and down in the air inlet passage, and when the vacuum suction cup is used, only the perforation is connected to increase the suction force and avoid the vacuum, and the air inlet passage is provided with a lifting space, and the top of the lifting space is provided with the retracting space. The stop surface, the inner side of the stop surface is further concavely provided with a connecting passage communicating with the air groove, and the lifting space is provided with a pressure valve piece having an outer diameter smaller than the inner diameter of the lifting space and larger than the inner diameter of the connecting channel and reciprocally movable up and down The inner diameter of the central perforation of the pressure valve piece is smaller than the inner diameter of the engagement channel. When the vacuum suction cup is not used, the pressure valve piece abuts against the surface of the filter net. When the vacuum suction cup is used, the pressure valve piece abuts against the stop surface. Only wear between the lifting space and the connecting channel Communication; provided corresponding to the base bottom surface of the cushion is in contact, and the contact below the bottom surface of the cushion has a contact preset object of adsorption, adsorption upwardly through the bottom surface is provided with a plurality of n communication channels of each of the gas suction channel. The vacuum chuck according to claim 1, wherein the top of each inlet passage of the base is provided with a stepped portion, and the outer diameter of the inlet passage is larger than the inner diameter of the lifting space and resists the step. The filter screen is further provided with a positioning ring that resists the filter to form a positioning in the air inlet channel. The vacuum chuck according to claim 1, wherein the vacuum suction device of the seat body is an external vacuum generator or a vacuum motor. The vacuum suction cup according to claim 1, wherein the vacuum suction device of the seat body The utility model has at least one U-shaped flow channel located in the gas tank, wherein the U-shaped flow channel has a plurality of through holes connected to the gas groove, and the two ends of the U-shaped flow channel are respectively connected to the through grooves of the seat body and the preset air compressor. The vacuum chuck according to claim 4, wherein the U-shaped flow passage is at least one diverging flow passage having a horizontal arrangement, and the two ends of the divergent flow passage are respectively provided with an inlet flow corresponding to each of the through grooves. The passage and the exhaust flow passage are further provided with a docking assembly protruding to the outside of the seat body, and the docking assembly corresponding to the intake runner is connected to the preset air compressor. The vacuum chuck according to claim 1, wherein the top surface of the body is provided with a cleaning slot connected to the air groove, and the cleaning slot is locked with a cleaning screw. The vacuum chuck according to claim 1, wherein a central portion of the top surface of the base body is provided with a fixing portion, and at least four fixing holes are disposed around the fixing portion. The vacuum chuck according to claim 1, wherein the contact pad is made of a soft foaming material such as rubber or silicone.