CN220051887U - Multi-point vacuum chuck - Google Patents

Abstract

The utility model relates to a multipoint vacuum sucker which comprises a shell and a plurality of suction parts, wherein an air flow channel is arranged in the shell, a plurality of suction holes are formed in the surface of the shell, the suction holes are communicated with the air flow channel, an air inlet pipe and an air outlet pipe which are communicated with the air flow channel are arranged on the side part of the shell, the suction parts are correspondingly arranged in the suction holes one by one, each suction part comprises a valve body, a sucker and a valve plug, the sucker is arranged at the upper end part of the valve body, the sucker is in interference fit with the suction holes, the skirt edge of the sucker and the end surface of the suction holes are positioned on the same horizontal plane, the skirt edge of the sucker is used for being attached to the surface of a workpiece, an air channel for communicating the air flow channel and the sucker is arranged in the middle part of the valve body, and the valve plug is movably arranged in the air channel. Set up the sucking disc at the valve body terminal surface, the shirt rim of sucking disc flushes with the terminal surface of absorption hole for the working face of casing keeps leveling, can not have the arch, and work piece atress is even, avoids there is the adsorption affinity not enough between part absorption piece and the work piece, and dull and stereotyped form work piece receives self gravity, and the whereabouts leads to the machining precision to reduce.

Description

Multi-point vacuum chuck

Technical Field

The utility model relates to the technical field of nonstandard grabbing equipment, in particular to a multipoint vacuum chuck.

Background

The multipoint vacuum chuck adsorbs the work piece by utilizing the internal and external air pressure difference of the chuck, and is most widely applied in CNC processing, an air chamber is arranged in the main body and is communicated with a through hole on the adsorption surface of the chuck, and an air valve is arranged in the through hole so as to realize the communication between the air extracting equipment and the work piece to be adsorbed outside. The applicant applied for a multi-point vacuum chuck, application number 202223293785.5, which is applied to the market, but the customer reflects that the adsorption grabbing force is insufficient, and the workpiece may fall off when some heavier workpieces are adsorbed, and the preliminary design is that a large skirt is additionally arranged on the end face of the chuck, but when the workpiece is adsorbed on a flat plate-shaped workpiece, the surface stress of the workpiece is uneven, and the workpiece cannot be adsorbed and grabbed by the adsorption parts in part of the adsorption holes, so that the workpiece processing precision is affected by the adsorption operation mode when the precise CNC assembly or cutting or other processes are carried out, and therefore, the improvement is needed.

Disclosure of Invention

Based on this, it is necessary to provide a multipoint vacuum chuck in view of the above problems.

A multipoint vacuum chuck, characterized in that: including casing and a plurality of absorption piece, the inside air current way that is provided with of casing, the casing surface is provided with a plurality of absorption holes, absorption hole and air current way are the intercommunication, the casing lateral part is provided with intake pipe and the outlet duct with air current way intercommunication, a plurality of absorption piece one-to-one is installed in the absorption downthehole, the absorption piece includes the valve body, sucking disc and valve plug, the sucking disc sets up at the valve body upper end, sucking disc and absorption hole interference fit, and the shirt rim of sucking disc is located same horizontal plane with the terminal surface of absorption hole, the shirt rim of sucking disc is used for attaching on the work piece surface, the valve body middle part is provided with the air flue that is used for intercommunication air current way and sucking disc, in the valve plug movable mounting air flue.

Preferably, the valve plug is disc-shaped and movably installed in the valve body for blocking the air passage, and the valve plug surface is provided with an air vent.

Preferably, the valve plug is the screw form, the rampart of air flue has set gradually first ladder portion and second ladder portion from last down, first ladder portion is used for the cock cap activity butt with the valve plug, there is the clearance between cock cap and the air flue rampart, the cock stem activity grafting of valve plug is in the air flue lower extreme, the cover is equipped with the spring on the cock stem, spring lower extreme and second ladder portion activity butt.

Preferably, the valve plug is made of soft rubber.

Preferably, the valve body comprises a valve cover and a valve seat, the valve cover and the valve seat are connected to form a cylinder, the valve plug is movably arranged in the valve seat, and the sucker is sleeved on the valve cover and communicated with the valve cover.

Preferably, a sealing ring which is in interference fit with the inner wall of the adsorption hole is sleeved outside the valve seat.

Preferably, a filter plate is further arranged in the valve body, and the filter plate is attached to the inner side of the valve cover.

Preferably, the side part of the shell is also provided with a drain pipe and an air pressure detector, and the drain pipe and the air pressure detector are communicated with the air flow channel.

Preferably, an air storage chamber is further arranged at one end, far away from the air inlet pipe, of the side portion of the shell, and the air storage chamber is communicated with the air flow channel.

Preferably, the air flow channel is laid in the shell in an S shape.

The utility model has the advantages that: the end face of the valve body is provided with the sucking disc, the skirt edge of the sucking disc is flush with the end face of the sucking hole, so that the working face of the shell is kept smooth, no bulge exists, the workpiece is uniformly stressed when a large-plane workpiece is sucked, the defect of insufficient suction force between a part of sucking parts and the workpiece is avoided, and the flat workpiece is subjected to self gravity and falls down to reduce the machining precision; when the heavy workpiece is sucked and grabbed, the skirt edge of the sucking disc is good in air tightness with the surface of the workpiece, pressure relief can be avoided, the grabbing force on the workpiece is strong, and the workpiece is prevented from falling.

Drawings

FIG. 1 is a schematic perspective view of a multi-point vacuum chuck according to one embodiment;

FIG. 2 is an exploded view of a multi-point vacuum chuck;

FIG. 3 is a schematic diagram of an adsorbing member according to an embodiment;

fig. 4 is a schematic structural diagram of an adsorbing member according to another embodiment.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The present utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the utility model, whereby the utility model is not limited to the specific embodiments disclosed below.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

As shown in fig. 1-2, a multipoint vacuum chuck comprises a shell 1 and a plurality of adsorption components 2, wherein an air flow channel 11 is arranged in the shell 1, a plurality of adsorption holes 12 are formed in the surface of the shell 1, the adsorption holes 12 are communicated with the air flow channel 11, an air inlet pipe 13 and an air outlet pipe 14 which are communicated with the air flow channel 11 are formed in the side part of the shell 1, the adsorption components 2 are installed in the adsorption holes 12 in a one-to-one correspondence manner, the adsorption components 2 comprise a valve body 21, a sucker 22 and a valve plug 23, the sucker 22 is arranged at the upper end part of the valve body 21, the sucker 22 is in interference fit with the adsorption holes 12, the skirt edge of the sucker 22 and the end surface of the adsorption holes 12 are located on the same horizontal plane, the skirt edge of the sucker 22 is used for being attached to the surface of a workpiece, an air channel 111 for communicating the air flow channel 11 and the sucker 22 is formed in the middle of the valve body 21, and the valve plug 23 is movably installed in the air channel 111. Specifically, in this embodiment, the casing 1 adopts split design, so that the air flow channel 11 is conveniently arranged therein, the air flow channel 11 is communicated with the air inlet pipe 13 and the air outlet pipe 14, a plurality of adsorption holes 12 are densely arranged on the surface of the casing 1 in a grid shape, and the adsorption holes 12 are circular and matched with the adsorption piece 2 for correspondingly installing the adsorption piece 2. In the utility model, the adsorption piece 2 comprises a valve body 21, a sucker 22 and a valve plug 23, an air channel 111 is arranged in the valve body 21 and is communicated with the sucker 22 and the air channel 11, the sucker 22 is arranged on the end face of the valve body 21, in order to enable the skirt edge of the sucker 22 to be flush with the end face of the adsorption hole 12, after the sucker 22 is hidden in the adsorption hole 12, the sucker 22 can be arranged by using a cementing process, the surface of the shell 1 is pushed horizontally by using a push knife, and the surface of the shell 1 is cut beyond the skirt edge of the sucker 22 of the adsorption hole 12. When adsorbing the work piece, the shirt rim of sucking disc 22 is direct to laminate with the work piece surface, adsorb, very big reinforcing the leakproofness between casing 1 and the work piece has strengthened its adsorption affinity, ensure simultaneously that the face that casing 1 contacted with the work piece remains level, when adsorbing platelike work piece, can not have part adsorption piece 2 protrusion casing 1, can lead to like this can not adsorb the work piece with the sucking disc of its adjacent adsorption piece 2, lead to the reduction of work piece adsorption strength, when adsorbing some sheet pieces, the terminal surface of casing 1 is uneven, probably leads to the adsorbed work piece face to remain no longer level, subsequent machining precision reduces.

As shown in fig. 2 to 3, the valve plug 23 is disc-shaped and movably mounted in the valve body 21 for sealing the air passage 111, the surface of the valve plug 23 is provided with air holes 231, and three air holes 231 are uniformly spaced around the central axis of the valve plug 23, and the air holes 231 are disposed at the edge. When the workpiece is adsorbed, the valve plug 23 is pressed down to be attached to the port of the air passage 111 to block the air passage 111, and only a trace amount of air flow flowing through the air holes 231 is left, so that the idle running of the background negative pressure pump is avoided.

As shown in fig. 2 and 4, the valve plug 23 is in a screw shape, the annular wall of the air channel 111 is sequentially provided with a first step portion 112 and a second step portion 113 from top to bottom, the first step portion 112 is used for movably abutting with a plug cap 232 of the valve plug 23, a gap exists between the plug cap 232 and the annular wall of the air channel 111, a plug rod 233 of the valve plug 23 is movably inserted into a lower channel of the air channel 111, a spring 234 is sleeved on the plug rod 233, and the lower end of the spring 234 is movably abutting with the second step portion 113. Specifically, in this embodiment, the valve plug 23 is designed into a screw shape, the plug cap 232 is upward, the plug rod 233 is downward, and is inserted into the lower channel of the air channel 111, the plug rod 233 is sleeved with the spring 234, when the workpiece is adsorbed, the valve plug 23 is pressed down under the action of air pressure, the plug cap 232 is attached to the table surface of the first step portion 112, and at this time, the plug rod 233 is completely inserted, the spring 234 is compressed by the plug cap 232 in cooperation with the second step portion 113, the valve plug 23 moves downward integrally, so that most of the air channel 111 is closed, and only a trace of air flows through the residual gap, so that the workpiece is continuously adsorbed and grabbed; when the workpiece needs to be removed, the negative pressure pump is turned off, the valve plug 23 returns under the action of the spring 234, and the workpiece can be removed without adsorption force.

Specifically, in this embodiment, the valve plug 23 in the shape of a sheet or screw is made of soft rubber, specifically may be silica gel, and the valve plug 23 may better cooperate with the annular wall of the air channel 111 to enhance the sealing performance.

As shown in fig. 3 to 4, the valve body 21 includes a valve cover 211 and a valve seat 212, the valve cover 211 and the valve seat 212 are connected to form a cylinder, the valve plug 23 is movably mounted in the valve seat 212, and the suction cup 22 is sleeved on the valve cover 211 and is communicated with the valve cover 211. Specifically, the valve cover 211 and the valve seat 212 can be bonded by glue, the air channel 111 is arranged along the central axis of the valve body 21, and the split design is adopted, so that when the valve is assembled, the valve plug 23 made of soft glue is installed in the valve body 21, the assembly is simpler, and a certain gap exists between the valve plug 23 and the annular wall of the air channel 111 in the valve body 21, so that the gas circulation is facilitated. For example, when the workpiece is adsorbed, the air flow channel inside the housing 1 is in a negative pressure state, and the external air enters the housing 1 through the valve body 21 under the action of atmospheric pressure, at this time, the valve plug 23 is strained due to softer material, so that the air flow channel 111 is blocked by pressing down, only a gap is left, so that tiny air passes through, the air flow channel inside the housing 1 is ensured to have air circulation, the equipment such as a negative pressure pump at the background is not idle, and the air tightness of the space between the sucker 22 and the workpiece is ensured, so that the adsorption force is enhanced, and the grasping is tighter. When the workpiece is not required to be adsorbed, the air flow channel 11 of the background shell 1 starts to be filled with air, the air pressure in the shell 1 is slightly higher than the external atmospheric pressure, and the valve plug 23 is restored under the action of self stress at the moment, so that the workpiece can be circularly grasped and put in a reciprocating mode.

As shown in fig. 3 to 4, the sealing ring 3 is sleeved outside the valve seat 212 and is in interference fit with the inner wall of the adsorption hole 12, so that the air tightness between the adsorption element 2 and the shell 1 is enhanced, and the gas is prevented from entering the air flow channel 11 from the gap between the adsorption element 2 and the adsorption hole 12, so that the adsorption capacity of the adsorption element 2 is reduced.

As shown in fig. 3 to 4, a filter 4 is further provided in the valve body 21, and the filter 4 is attached to the inner side of the valve cover 211. Specifically, when the sucking disc is used for sucking a workpiece for cutting, chips are inevitably generated, in order to prevent the chips from entering the sucking part 2 along with the action of air flow and blocking the air passage 111, a filter sheet 4 is arranged at an air inlet at the upper end of the valve body 21, and the filter sheet 4 is breathable and netlike, so that the chips can be blocked and prevented from entering the shell 1 along with the air flow under the action of air pressure.

As shown in fig. 1 to 2, a drain pipe 15 and a barometer 16 are further provided on the side of the housing 1, and both the drain pipe 15 and the barometer 16 are in communication with the airflow channel 11. Specifically, because cutting fluid is inevitably used when CNC processes the workpiece, part of spray cutting fluid can be under the atmospheric pressure effect, along with the adsorption piece 2 get into casing 1, remain in the air channel 11, in order to discharge this part of liquid, we can be when overhauling and maintaining the vacuum chuck, high-pressure gas is input to casing 1 inside through intake pipe 13, then liquid can be under the atmospheric pressure effect, along with air channel 11, discharge from drain pipe 15, understandably, be provided with the valve on the drain pipe 15, in order to guarantee the gas tightness of air channel 11, and set up 1 barometer 16 at casing 1 lateral part, be used for when using the sucking disc to snatch the workpiece, adjust casing 1 inside atmospheric pressure, adjust adsorption strength of adsorption piece 2 with the help of inside and outside pressure difference.

As shown in fig. 1-2, an air storage chamber 17 is further arranged at one end of the side part of the shell 1 away from the air inlet pipe 13, and the air storage chamber 17 is communicated with the air flow passage 11. Specifically, the air storage chamber 17 is in a U shape, and has a main function of playing a buffering role, because the length of the designed air flow channel 11 is long, when adsorption is performed, the inner space of the air flow channel 11 is pumped to negative pressure, gas cannot be pumped out of the shell from a pipeline with a limited caliber in the moment, the air storage chamber 17 is used as a temporary gas storage space for partial pumping, so that the response speed of the sucking disc for instantly adsorbing a workpiece is ensured, the instant response speed is high, and the processing efficiency of the adsorbed workpiece is also higher.

As shown in fig. 2, the air flow channel 11 is laid in the shell 1 in an S-shape, so that the air pressure intensity of each place in the air flow channel 11 is kept consistent, the adsorption force of each adsorption element 2 to the workpiece is kept consistent, the work is more uniform, and the balance of the workpiece is ensured.

The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims (10)

1. A multipoint vacuum chuck, characterized in that: including casing and a plurality of absorption piece, the inside air current way that is provided with of casing, the casing surface is provided with a plurality of absorption holes, absorption hole and air current way are the intercommunication, the casing lateral part is provided with intake pipe and the outlet duct with air current way intercommunication, a plurality of absorption piece one-to-one is installed in the absorption downthehole, the absorption piece includes the valve body, sucking disc and valve plug, the sucking disc sets up at the valve body upper end, sucking disc and absorption hole interference fit, and the shirt rim of sucking disc is located same horizontal plane with the terminal surface of absorption hole, the shirt rim of sucking disc is used for attaching on the work piece surface, the valve body middle part is provided with the air flue that is used for intercommunication air current way and sucking disc, in the valve plug movable mounting air flue.

2. A multi-point vacuum chuck as set forth in claim 1, wherein: the valve plug is disc-shaped and movably arranged in the valve body and used for blocking the air passage, and the valve plug surface is provided with an air vent.

3. A multi-point vacuum chuck as set forth in claim 1, wherein: the valve plug is in a screw shape, a first step part and a second step part are sequentially arranged on the annular wall of the air passage from top to bottom, the first step part is used for being movably abutted to a plug cap of the valve plug, a gap exists between the plug cap and the annular wall of the air passage, a plug rod of the valve plug is movably inserted into a lower air passage, a spring is sleeved on the plug rod, and the lower end of the spring is movably abutted to the second step part.

4. A multi-point vacuum chuck as claimed in claim 2 or 3, wherein: the valve plug is made of soft rubber.

5. A multi-point vacuum chuck as claimed in claim 2 or 3, wherein: the valve body comprises a valve cover and a valve seat, the valve cover is connected with the valve seat to form a cylinder, the valve plug is movably arranged in the valve seat, and the sucker is sleeved on the valve cover and is communicated with the valve cover.

6. A multi-point vacuum chuck as set forth in claim 5, wherein: and a sealing ring in interference fit with the inner wall of the adsorption hole is sleeved outside the valve seat.

7. A multi-point vacuum chuck as set forth in claim 5, wherein: and a filter disc is further arranged in the valve body, and the filter disc is attached to the inner side of the valve cover.

8. A multi-point vacuum chuck as set forth in claim 1, wherein: the side part of the shell is also provided with a drain pipe and a barometer, and the drain pipe and the barometer are communicated with the air flow channel.

9. A multi-point vacuum chuck as set forth in claim 8, wherein: the side part of the shell is further provided with an air storage chamber at one end far away from the air inlet pipe, and the air storage chamber is communicated with the air flow passage.

10. A multi-point vacuum chuck as set forth in claim 1, wherein: the air flow channel is tiled in the shell in an S shape.