CN110605734A - Gas-saving expansion type vacuum generation and absorption integrated device and working method thereof - Google Patents
Gas-saving expansion type vacuum generation and absorption integrated device and working method thereof Download PDFInfo
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- CN110605734A CN110605734A CN201910812675.9A CN201910812675A CN110605734A CN 110605734 A CN110605734 A CN 110605734A CN 201910812675 A CN201910812675 A CN 201910812675A CN 110605734 A CN110605734 A CN 110605734A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25J—MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
- B25J15/00—Gripping heads and other end effectors
- B25J15/06—Gripping heads and other end effectors with vacuum or magnetic holding means
- B25J15/0616—Gripping heads and other end effectors with vacuum or magnetic holding means with vacuum
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Abstract
The invention discloses a gas-saving expansion type vacuum generation and absorption integrated device and a working method thereof, wherein the upper part of the device is a vacuum generation and maintenance structure, the middle part of the device is an air pumping and releasing structure, and the bottom of the device is a vacuum absorption structure; the vacuum generation and maintenance structure comprises a pressure spring structure and a cylinder vacuum chamber structure, the cylinder vacuum chamber structure comprises a proximity switch, an upper end cover, a lower end cover, a vacuum cylinder, a piston rod, a piston, a proximity switch mounting port is arranged on the upper end cover, a filtering port and a piston rod mounting port, the proximity switch is fixedly mounted on the proximity switch mounting port and stretches into the vacuum cylinder, the lower end of the piston rod is fixedly connected with the piston, the pressure spring structure is sleeved on the outer side of the piston rod, which is located at the outside of the vacuum cylinder, the pumping and exhausting structure comprises a connecting sleeve, a one-way valve is released in vacuum, and an auxiliary vacuum generation one-way valve is generated, and the vacuum suction structure is arranged below the. The invention has the functions of vacuum generation, absorption, maintenance and removal, and has the advantages of comprehensive functions, simple structure and low air consumption.
Description
Technical Field
The invention relates to the field of vacuum pneumatic material handling, in particular to a gas-saving expansion type vacuum generation and absorption integrated device and a working method thereof.
Background
The vacuum suction technique is a very easy to master transfer technique and a very reliable auxiliary technique. The vacuum technology is utilized to adjust, control and monitor, so that the packaging and transportation efficiency of workpieces and parts under the automatic, semi-automatic and manual working states can be effectively improved. However, the vacuum suction device of the present invention consumes a large amount of compressed gas during the vacuum generation and maintenance stage during the operation, and this portion is large in the total cost.
Chinese patent 200610040832.1 discloses a "flow self-regulated jet vacuum generator", which has an automatic flow regulation part integrated inside the vacuum generator, when the vacuum degree reaches a set value, an adjustable cone enters into the interior of a laval tube to reduce the effective area of the throat part of the vacuum generator, thereby automatically reducing the air supply flow and realizing automatic regulation of the supply flow. The flow-adjustable vacuum generator has approximately the same vacuum response characteristic as a common vacuum generator in a vacuum generating stage, and the energy consumption is saved by 14.8% in a vacuum maintaining stage. Although the jet vacuum generator achieves the aim of saving gas to a certain extent, the traditional vacuum generating device is still used for generating vacuum, a large amount of compressed gas is consumed in the working process, only the vacuum generating function is needed, the vacuum sucking and vacuum removing functions need to be solved by other devices, and the structure is bulky and complex.
Disclosure of Invention
The invention aims to provide a gas-saving expansion type vacuum generation and absorption integrated device with low gas consumption and a working method thereof.
The technical solution for realizing the purpose of the invention is as follows: a gas-saving expansion type vacuum generation and absorption integrated device comprises an expansion type vacuum generation element, wherein the expansion type vacuum generation element comprises an upper part, a middle part and a lower part, the upper part is a vacuum generation and maintenance structure, the middle part is an air pumping and releasing structure, and the bottom part is a vacuum absorption structure; the vacuum generating and maintaining structure comprises a pressure spring structure and a cylindrical vacuum containing cavity structure, the cylindrical vacuum containing cavity structure comprises a proximity switch, an upper end cover, a lower end cover, a vacuum cylinder, a piston rod, a piston sealing ring, a vacuum cylinder sealing ring and a filtering screw, the upper end cover and the lower end cover are respectively and fixedly arranged at the upper end and the lower end of the vacuum cylinder, the upper end cover is provided with a proximity switch mounting port, a filtering port and a piston rod mounting port, the proximity switch is fixedly arranged on the proximity switch mounting port and extends into the vacuum cylinder, the filtering screw is arranged on the filtering port and is provided with a through hole along the axial direction, the lower end of the piston rod penetrates through the piston rod mounting port and extends into the vacuum cylinder, the tail end of the piston rod is fixedly connected with the piston, and the piston sealing ring is arranged between the piston and the vacuum, the vacuum cylinder sealing rings are arranged at the positions where the upper end cover and the lower end cover are contacted with the vacuum cylinder, the pressure spring structure is sleeved at the outer side of the piston rod positioned outside the vacuum cylinder,
the vacuum releasing one-way valve is connected with the vacuum releasing one-way valve interface and the auxiliary vacuum generating one-way valve interface which are communicated with the axial through hole of the connecting sleeve, the vacuum releasing one-way valve is connected with the vacuum releasing one-way valve interface, and the auxiliary vacuum generating one-way valve is connected with the auxiliary vacuum generating one-way valve interface; the vacuum suction structure is arranged below the air pumping and discharging structure and is communicated with the inside of the vacuum cylinder through the axial through hole of the connecting sleeve.
Further, the pressure spring structure comprises a spring and a pressure spring piece, the pressure spring piece is fixedly sleeved outside the piston rod, the lower end of the spring abuts against the upper surface of the upper end cover, and the upper end of the spring abuts against the lower end face of the pressure spring piece.
Furthermore, the cylinder vacuum cavity structure still includes the filter screen, the filtration mouth is a step hole, the filter screen set up in on the step face in step hole, filter screw and filtration mouth threaded connection just its lower surface compresses tightly the filter screen.
Further, the tail end of the piston rod is fixedly connected with the piston through threads.
Further, the vacuum suction structure includes fastening nut, connector and vacuum chuck, the upper end of connector with threaded connection is passed through to the lower part of the axial through hole of adapter sleeve, the lower extreme and the vacuum chuck of connector are connected, the connector is located to the fastening nut cover outside between adapter sleeve and the vacuum chuck is in order to realize the fastening to vacuum chuck.
Furthermore, a first sealing washer is arranged between the connecting sleeve and the lower end cover, and a second sealing washer is arranged between the connecting sleeve and the connecting head.
Furthermore, the vacuum sucker is made of nitrile rubber or silicon rubber, and the sucker mouth is flat or organ-shaped.
Further, the device also comprises three pneumatic circuits which are respectively an operating cylinder telescopic circuit, an auxiliary vacuum generating circuit and a vacuum releasing circuit, the three pneumatic circuits are connected with an air source 21 through an oil mist filter 22 and a pressure reducing valve 23,
the telescopic loop of the operating cylinder comprises two silencers 24, a three-position five-way electromagnetic valve 25, two overflow valves 26 and an operating cylinder 27, the two silencers 24 and the two overflow valves 26 are respectively connected at two ends of the three-position five-way electromagnetic valve 25, an air inlet of the three-position five-way electromagnetic valve 25 is communicated with an air outlet of the pressure reducing valve 23, two air inlets of the operating cylinder 27 are respectively connected with the two overflow valves 26, a telescopic rod of the operating cylinder 27 is in threaded connection with the top of the piston rod 1,
the auxiliary vacuum generating loop comprises a relay 28, a 24V power supply 29, an auxiliary jet type vacuum generator 30 and a vacuum generating valve 31, one end of the relay 28 is connected with the proximity switch 2, the other end of the relay is connected with one end of the 24V power supply 29, the other end of the 24V power supply 29 is connected with a signal receiving part of the vacuum generating valve 31, an air inlet of the auxiliary jet type vacuum generator 30 is connected with an air outlet of the vacuum generating valve 31, an air suction port of the auxiliary jet type vacuum generator 30 is connected with an auxiliary vacuum generating one-way valve 9, an air outlet of the pressure reducing valve 23 is communicated with an air inlet of the vacuum generating valve 31,
the vacuum release loop comprises a vacuum release valve 32, an air outlet of the pressure reducing valve 23 is communicated with an air inlet of the vacuum release valve 32, and an air outlet of the vacuum release valve 32 is connected with the vacuum release one-way valve 13.
The working method of the throttle-type expansion type vacuum generation and absorption integrated device comprises the following steps:
the method comprises the following steps: an expansion type vacuum generation stage: in the initial state, the piston is positioned at the topmost part of the vacuum cylinder, the operating cylinder pushes the piston rod to move downwards to drive the device to move downwards, after the vacuum chuck contacts a workpiece, the piston rod continues to descend to push the piston to move downwards in the vacuum cylinder until the piston contacts with the lower end cover, and most of air in the vacuum cylinder and the vacuum chuck is exhausted at the moment, so that the variable volume of the capacity-expanding vacuum generating element is minimized; then the operation cylinder is lifted upwards, the vacuum cylinder of the expansion type vacuum generation element is downward attached with a vacuum sucker by the combined action of gravity and spring force, the internal volume of the expansion type vacuum generation element is increased, the air pressure is reduced, vacuum is generated, the vacuum sucker realizes vacuum adsorption with a workpiece, and the suction device drives the workpiece to move to a station;
step two: and (3) a vacuum maintaining stage: during the operation of the expansion type vacuum generating element, if a workpiece and the surface of the sucker have micro air leakage, the piston can move upwards to further expand the micro rising of the volume compensation air pressure and ensure the maintenance of the vacuum state and the safety of suction; when the state is continuously carried out and the piston moves to the detection range of the proximity switch, the proximity switch sends a signal, the relay receives the signal, the vacuum generating valve in the auxiliary gas path is switched on, and the auxiliary jet type vacuum generator starts to work, so that the required vacuum can be maintained in the sucker, and the safe operation of the sucking operation is ensured; if the surface of the workpiece and the surface of the sucking disc are not air-leaked, the expansion type vacuum generating element can ensure the vacuum state and cannot start the auxiliary vacuum generator to work;
step three: and (3) vacuum relief stage: and after the workpiece reaches the station, the vacuum release valve is switched on, the vacuum release one-way valve is inflated, the vacuum state is released, the workpiece is separated from the vacuum sucker, and a working cycle is completed.
Compared with the prior art, the invention has the remarkable advantages that:
(1) the invention changes the traditional mode of generating vacuum by using a vacuum generator or a vacuum pump, utilizes a cylindrical vacuum cylinder structure, generates initial vacuum by downwards pressing and exhausting air in a vacuum cylinder and a sucker through a piston, and assists to maintain the vacuum state in the suction process through the self weight of the sucked object, thereby obviously reducing the air consumption in the working process;
(2) the invention designs the pressure spring structure, and because the spring is always in a compressed state in the piston rising stage, the spring can provide pulling force for the upward movement of the piston rod to enable the piston to better overcome the static friction with the inner wall of the vacuum cylinder and effectively offset the static friction between the piston and the vacuum cylinder;
(3) the vacuum generating and vacuum absorbing structure is integrated, so that the vacuum generator has the functions of vacuum generation, absorption, maintenance and removal, and is comprehensive in function and simple in structure;
(4) the invention can automatically detect the working limit position of the expansion type vacuum generating element and start the auxiliary vacuum generating function through the proximity switch, thereby realizing the safe and effective work of the whole vacuum generating and sucking device.
Drawings
FIG. 1 is a sectional view of the overall structure and pneumatic circuit connection of the integrated gas-saving vacuum expansion and suction device of the present invention.
FIG. 2 is a top view of the upper end cap of the present invention.
Fig. 3 is a sectional view taken along line a-a of fig. 2.
FIG. 4 is a top view of the lower endcap of the present invention.
Fig. 5 is a sectional view taken along line B-B of fig. 4.
Fig. 6 is a schematic view of the structure of the piston of the present invention.
Fig. 7 is a top view of the connecting sleeve of the present invention.
Fig. 8 is a sectional view taken along line C-C of fig. 7.
Fig. 9 is a front view of the connector of the present invention.
Detailed Description
The following describes the implementation of the present invention in detail with reference to specific embodiments.
The invention has the idea that the piston presses down to exhaust the air in the vacuum cylinder and the sucker to generate initial vacuum, the vacuum state in the suction process is maintained through the self weight of the sucked object, and when the vacuum degree in the vacuum cylinder can not meet the suction requirement, the auxiliary vacuum generating function is automatically opened, thereby realizing the safe and reliable suction of the device.
With reference to fig. 1-9, a gas-saving expansion-type vacuum generation and suction integrated device includes an expansion-type vacuum generation element and three pneumatic circuits, wherein the expansion-type vacuum generation element is divided into an upper part, a middle part and a lower part, the upper part is a vacuum generation and maintenance structure, the middle part is an air exhaust structure, and the bottom part is a vacuum suction structure; the vacuum generating and maintaining structure comprises a pressure spring structure and a cylindrical vacuum containing cavity structure, the cylindrical vacuum containing cavity structure comprises a proximity switch 2, an upper end cover 4, a lower end cover 8, a vacuum cylinder 5, a piston rod 1, a piston 6, a piston seal ring 7, a vacuum cylinder seal ring 3 and a filter screw 18, the upper end cover 4 and the lower end cover 8 are respectively and fixedly arranged at the upper end and the lower end of the vacuum cylinder 5, in combination with a figure 2-3, the upper end cover 4 is provided with a proximity switch mounting port, a filter port and a piston rod mounting port, the proximity switch 2 is fixedly arranged on the proximity switch mounting port and extends into the vacuum cylinder 5, the filter screw 18 is arranged on the filter port, the filter screw 18 is provided with a through hole along the axial direction, the lower end of the piston rod 1 penetrates through the piston rod mounting port and extends into the vacuum cylinder 5, and the tail end of the piston rod 1 is fixedly, the piston sealing ring 7 is arranged between the piston 6 and the vacuum cylinder 5, the vacuum cylinder sealing ring 3 is arranged at the position where the upper end cover 4 and the lower end cover 8 are contacted with the vacuum cylinder 5, the pressure spring structure is sleeved at the outer side of the piston rod 1 positioned outside the vacuum cylinder 5,
the air pumping and releasing structure comprises a connecting sleeve 16, a vacuum releasing one-way valve 13 and an auxiliary vacuum generating one-way valve 9, the upper end of the connecting sleeve 16 is connected with an axial through hole (see fig. 4-5) of a lower end cover 8, the lower end of the connecting sleeve is connected with a vacuum absorbing structure, the connecting sleeve 16 is provided with an axial through hole in combination with fig. 7-8, a vacuum releasing one-way valve interface and an auxiliary vacuum generating one-way valve interface which are communicated with the axial through hole of the connecting sleeve 16 are respectively arranged on two sides of the connecting sleeve 16, the vacuum releasing one-way valve 13 is connected with the vacuum releasing one-way valve interface, the auxiliary vacuum generating one-way valve 13 is connected with the auxiliary vacuum generating one-way valve interface, the vacuum releasing one-way valve 13 only can; the vacuum suction structure is arranged below the air pumping and discharging structure and is communicated with the inside of the vacuum cylinder 5 through an axial through hole of the connecting sleeve 16.
The device bottom is the vacuum suction structure, including vacuum chuck 12, connector 11 and fastening nut 10, and vacuum chuck 12 is installed on connector 11, and fastening nut 10 is connected with connector 11 through the screw thread, fastens vacuum chuck 12 on connector 11, and connector 11 is connected with adapter sleeve 16 through the screw thread, is equipped with sealing washer 14 between adapter sleeve 16 and the connector 11.
The outside of the gas-saving expansion type vacuum generation and absorption integrated device is also connected with three pneumatic circuits, namely an operation cylinder telescopic circuit, an auxiliary vacuum generation circuit and a vacuum release circuit, and compressed air is discharged from an air source 21 and flows through an oil mist filter 22 and a pressure reducing valve 23 to be introduced into the three circuits.
The telescopic loop of the operating cylinder comprises two silencers 24, a three-position five-way electromagnetic valve 25, two overflow valves 26 and an operating cylinder 27, wherein the silencers 24 and the overflow valves 26 are respectively connected at two ends of the three-position five-way electromagnetic valve 25, two air inlets of the operating cylinder 27 are respectively connected with the two overflow valves 26, and a telescopic rod of the operating cylinder is in threaded connection with the piston rod 1. Compressed gas is introduced from the inlet of the three-position five-way solenoid valve 25, discharged from the two exhaust ports, and flows through the two relief valves 26, respectively, and is charged into the two inlets of the operating cylinder 27.
The auxiliary vacuum generating loop comprises a relay 28, a 24V power supply 29, an auxiliary jet type vacuum generator 30 and a vacuum generating valve 31, wherein one end of the relay 28 is connected with the proximity switch 2, one end of the relay is connected with the 24V power supply 29, and the other end of the 24V power supply is connected with a signal receiving part of the vacuum generating valve 31; the air inlet of the auxiliary jet type vacuum generator 30 is connected with the air outlet of the vacuum generating valve 31, the air suction port thereof is connected with the auxiliary vacuum generating one-way valve 9, and compressed air is introduced from the air inlet of the vacuum generating valve 31.
The vacuum release circuit includes a vacuum release valve 32 into which compressed air is introduced from its inlet, discharged from its outlet, and introduced into the vacuum release check valve 13.
The upper end of the piston rod 1 is provided with an internal thread for connection with the operating cylinder 27. The vacuum suction cup 12 is made of nitrile rubber or silicon rubber, and the mouth shape of the suction cup is flat or organ.
The piston 6 is structured as shown in fig. 6, and the coupling head 11 is structured as shown in fig. 9.
The specific working process of the present invention is described below with reference to fig. 1:
first, expanding type vacuum generation stage
In an initial state, the piston 6 is positioned at the topmost part of the vacuum cylinder 5, the operating cylinder 27 pushes the piston rod 1 to move downwards to drive the suction device to move downwards, after the vacuum chuck 12 contacts a workpiece, the piston rod 1 continues to descend to push the piston 6 to move downwards in the vacuum cylinder 5 until the piston 6 contacts the lower end cover 8, and most of air in the vacuum cylinder 5 and the vacuum chuck 12 is exhausted at the moment, so that the variable volume of the capacity-expansion type vacuum generating element is minimized; then the operation cylinder 27 is lifted upwards, the vacuum cylinder 5 of the expansion type vacuum generating element is enabled to be attached with the vacuum chuck 12 to move downwards under the combined action of gravity and spring force, at the moment, the internal volume of the expansion type vacuum generating element is increased, the air pressure is reduced, vacuum is generated, the vacuum chuck 12 realizes vacuum adsorption with the workpiece, and the suction device drives the workpiece to move towards the station;
second, vacuum maintaining stage
The cylinder 27 is operated to lift up the vacuum suction device, due to the factors of the dead weight of the workpiece and micro air leakage, the piston 6 can move upwards in the vacuum cylinder 5 relative to the lower end cover 8, the elastic force of the spring 19 can effectively offset the static friction of the movement of the piston 6, the spring 19 is always in a compressed state in the rising stage of the piston 6, so that tensile force can be provided for the upward movement of the piston rod 1 to enable the piston to better overcome the static friction with the inner wall of the vacuum cylinder 5, so that the static friction between the piston and the vacuum cylinder can be effectively offset, a vacuum cavity is formed between the piston 6 and the lower end cover 8 along with the movement of the piston to compensate vacuum, when the piston 6 moves to the detection range of the proximity switch 2, the proximity switch 2 sends out a signal, the relay 28 receives the signal, the vacuum generation valve 31 in the auxiliary air passage is switched on, the auxiliary jet type vacuum generator 30 starts, the safe operation of the sucking operation is ensured; if the workpiece and the surface of the vacuum chuck 12 are not air-leaked, the expansion type vacuum generating element can ensure the vacuum state, and the auxiliary jet type vacuum generator 30 cannot be started to work;
step three: and (3) vacuum relief stage: after the workpiece reaches the station, the vacuum release valve 32 is switched on, the vacuum release one-way valve 13 is inflated, the vacuum state is released, the workpiece is separated from the vacuum chuck 12, and a working cycle is completed.
The vacuum suction device comprises three working states: 1. when the sucked workpiece is light in weight, the vacuum suction device can meet the working requirement by the vacuum compensated by the vacuum cylinder 5 in the moving process without starting an auxiliary vacuum generating device; 2. when the sucked workpiece is heavy and the vacuum compensated by the vacuum cylinder 5 cannot meet the working requirement (namely the piston 6 can move to the detection range of the proximity switch 2), the proximity switch 2 transmits a signal after the piston 6 moves to the detection range of the proximity switch 2, so that the auxiliary vacuum generating device is turned on, and the safe and stable operation of the device is ensured; 3. when the air leakage of the surface of the sucked workpiece is serious (for example, the surface of the workpiece is rough and uneven), the piston 6 can slowly move upwards in the vacuum cylinder 5 during working until the piston 6 reaches the detection range of the proximity switch 2, the auxiliary vacuum generating device is turned on, and the workpiece is sucked by the auxiliary vacuum generating device.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (9)
1. A gas-saving type expansion vacuum generation and absorption integrated device comprises an expansion vacuum generation element, and is characterized in that the expansion vacuum generation element comprises an upper part, a middle part and a lower part, wherein the upper part is a vacuum generation and maintenance structure, the middle part is an air pumping and releasing structure, and the bottom is a vacuum absorption structure; the vacuum generating and maintaining structure comprises a pressure spring structure and a cylinder vacuum chamber structure, the cylinder vacuum chamber structure comprises a proximity switch (2), an upper end cover (4), a lower end cover (8), a vacuum cylinder (5), a piston rod (1), a piston (6), a piston sealing ring (7), a vacuum cylinder sealing ring (3) and a filter screw (18), the upper end cover (4) and the lower end cover (8) are respectively and fixedly arranged at the upper end and the lower end of the vacuum cylinder (5), the upper end cover (4) is provided with a proximity switch mounting port, a filter port and a piston rod mounting port, the proximity switch (2) is fixedly arranged on the proximity switch mounting port and extends into the vacuum cylinder (5), the filter screw (18) is arranged on the filter port, the filter screw (18) is provided with a through hole along the axial direction, the lower end of the piston rod (1) passes through the piston rod mounting port and extends into the vacuum cylinder (5), the tail end of the piston rod (1) is fixedly connected with the piston (6), the piston sealing ring (7) is arranged between the piston (6) and the vacuum cylinder (5), the vacuum cylinder sealing ring (3) is arranged at the position where the upper end cover (4) and the lower end cover (8) are contacted with the vacuum cylinder (5), the pressure spring structure is sleeved on the outer side of the piston rod (1) which is positioned outside the vacuum cylinder (5),
the vacuumizing and deflating structure comprises a connecting sleeve (16), a vacuum releasing one-way valve (13) and an auxiliary vacuum generating one-way valve (9), the upper end of the connecting sleeve (16) is connected with an axial through hole of the lower end cover (8), the lower end of the connecting sleeve is connected with a vacuum sucking structure, the connecting sleeve (16) is provided with an axial through hole, two sides of the connecting sleeve (16) are respectively provided with a vacuum releasing one-way valve interface and an auxiliary vacuum generating one-way valve interface which are communicated with the axial through hole of the connecting sleeve, the vacuum releasing one-way valve (13) is connected with the vacuum releasing one-way valve interface, and the auxiliary vacuum generating one-way valve (9) is connected with the auxiliary; the vacuum suction structure is arranged below the air pumping and discharging structure and is communicated with the inside of the vacuum cylinder (5) through an axial through hole of the connecting sleeve (16).
2. The integrated throttling and expanding vacuum generating and sucking device according to claim 1, wherein the pressure spring structure comprises a spring (19) and a pressure spring member (20), the pressure spring member (20) is fixedly sleeved outside the piston rod (1), the lower end of the spring (19) abuts against the upper surface of the upper end cover (4), and the upper end of the spring abuts against the lower end face of the pressure spring member (20).
3. The integrated throttle-type expansion vacuum generating and sucking device as claimed in claim 1, wherein the cylindrical vacuum chamber structure further comprises a filter screen (17), the filter opening is a stepped hole, the filter screen (17) is disposed on a stepped surface of the stepped hole, the filter screw (18) is in threaded connection with the filter opening, and the lower surface of the filter screw compresses the filter screen (17).
4. The integrated throttle-type expansion vacuum generating and sucking device as claimed in claim 1, wherein the end of the piston rod (1) is fixedly connected with the piston (6) by a thread.
5. The integrated device for throttling expansion type vacuum generation and suction according to claim 1, wherein the vacuum suction structure comprises a fastening nut (10), a connector (11) and a vacuum chuck (12), the upper end of the connector (11) is in threaded connection with the lower part of the axial through hole of the connector sleeve (16), the lower end of the connector (11) is connected with the vacuum chuck (12), and the fastening nut (10) is sleeved on the outer part of the connector (11) between the connector sleeve (16) and the vacuum chuck (12) to fasten the vacuum chuck (12).
6. The integrated throttling and expanding vacuum generating and sucking device as claimed in claim 5, characterized in that a first sealing washer (15) is arranged between the connecting sleeve (16) and the lower end cover (8), and a second sealing washer (14) is arranged between the connecting sleeve (16) and the connecting head (11).
7. The integrated throttling, expansion type vacuum generating and sucking device as claimed in claim 5, wherein the vacuum sucking disc (12) is made of nitrile rubber or silicon rubber, and the sucking disc mouth is flat or organ type.
8. The integrated throttle-type expansion vacuum generating and sucking device according to any one of claims 1 to 7, further comprising three pneumatic circuits, which are an operating cylinder telescopic circuit, an auxiliary vacuum generating circuit and a vacuum releasing circuit, respectively, and which are connected to the air supply (21) through an oil mist filter (22) and a pressure reducing valve (23),
the telescopic loop of the operating cylinder comprises two silencers (24), a three-position five-way electromagnetic valve (25), two overflow valves (26) and an operating cylinder (27), the two silencers (24) and the two overflow valves (26) are respectively connected at two ends of the three-position five-way electromagnetic valve (25), an air inlet of the three-position five-way electromagnetic valve (25) is communicated with an air outlet of the pressure reducing valve (23), two air inlets of the operating cylinder (27) are respectively connected with the two overflow valves (26), a telescopic rod of the operating cylinder (27) is in threaded connection with the top of the piston rod (1),
the auxiliary vacuum generation loop comprises a relay (28), a 24V power supply (29), an auxiliary jet type vacuum generator (30) and a vacuum generation valve (31), one end of the relay (28) is connected with the proximity switch (2), the other end of the relay is connected with one end of the 24V power supply (29), the other end of the 24V power supply (29) is connected with a signal receiving part of the vacuum generation valve (31), an air inlet of the auxiliary jet type vacuum generator (30) is connected with an air outlet of the vacuum generation valve (31), an air suction port of the auxiliary jet type vacuum generator (30) is connected with an auxiliary vacuum generation one-way valve (9), an air outlet of the pressure reducing valve (23) is communicated with an air inlet of the vacuum generation valve (31),
the vacuum release loop comprises a vacuum release valve (32), an air outlet of the pressure reducing valve (23) is communicated with an air inlet of the vacuum release valve (32), and an air outlet of the vacuum release valve (32) is connected with the vacuum release one-way valve (13).
9. The method of operating an integrated throttled, expandable vacuum generating and extracting device of claim 8, comprising the steps of:
the method comprises the following steps: an expansion type vacuum generation stage: in an initial state, the piston (6) is positioned at the topmost part of the vacuum cylinder (5), the operating cylinder (27) pushes the piston rod (1) to move downwards to drive the device to move downwards, after the vacuum chuck (12) contacts a workpiece, the piston rod (1) continues to descend to push the piston (6) to move downwards in the vacuum cylinder (5) until the piston (6) contacts with the lower end cover (8), most of air in the vacuum cylinder (5) and the vacuum chuck (12) is exhausted at the moment, so that the variable volume of the expansion type vacuum generating element is minimized, then the operating cylinder (27) is lifted upwards, the vacuum cylinder (5) of the expansion type vacuum generating element is additionally provided with the vacuum chuck (12) to move downwards under the combined action of gravity and spring force, at the moment, the volume of the expansion type vacuum generating element is increased, the air pressure is reduced, vacuum is generated, and the vacuum chuck (12) realizes vacuum adsorption with the workpiece, the suction device drives the workpiece to move to the station;
step two: and (3) a vacuum maintaining stage: during the operation of the expansion type vacuum generating element, if a workpiece and the surface of a vacuum chuck (12) have micro air leakage, the piston (6) can move upwards to further expand the micro rising of volume compensation air pressure and ensure the maintenance and suction safety of a vacuum state, when the state is continuously carried out and the piston (6) moves to the detection range of the proximity switch (2), the proximity switch (2) sends a signal, the relay (28) receives the signal, the vacuum generating valve (31) is switched on, the auxiliary jet type vacuum generator (30) starts to operate to enable the chuck to maintain the required vacuum, if the workpiece and the surface of the vacuum chuck (12) have no air leakage, the expansion type vacuum generating element can ensure the vacuum state, and the auxiliary jet type vacuum generator (30) cannot be started to operate;
step three: and (3) vacuum relief stage: after the workpiece reaches the station, the vacuum release valve (32) is switched on, the vacuum release one-way valve (13) is inflated, the vacuum state is released, the workpiece is separated from the vacuum chuck (12), and a working cycle is completed.
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| CN111180783A (en) * | 2020-01-07 | 2020-05-19 | 速博达(深圳)自动化有限公司 | Self-adaptive ballast |
| CN113370253A (en) * | 2021-07-05 | 2021-09-10 | 秦振风 | Air flow point control type object suction claw |
| DE102020116113A1 (en) | 2020-06-18 | 2021-12-23 | Universität Kassel | Vacuum mask, device and method for demolding a casting |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111071789A (en) * | 2019-12-30 | 2020-04-28 | 苏州钧舵机器人有限公司 | Pump-free electric vacuum chuck device |
| CN111180783A (en) * | 2020-01-07 | 2020-05-19 | 速博达(深圳)自动化有限公司 | Self-adaptive ballast |
| DE102020116113A1 (en) | 2020-06-18 | 2021-12-23 | Universität Kassel | Vacuum mask, device and method for demolding a casting |
| CN113370253A (en) * | 2021-07-05 | 2021-09-10 | 秦振风 | Air flow point control type object suction claw |
| CN114176053A (en) * | 2021-12-14 | 2022-03-15 | 中国海洋大学 | Device for underwater harvesting |
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