CN201456000U

CN201456000U - Fixture for air-pressure detection

Info

Publication number: CN201456000U
Application number: CN2008202044150U
Authority: CN
Inventors: 喻铁军
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-12-01
Filing date: 2008-12-01
Publication date: 2010-05-12
Anticipated expiration: 2018-12-01

Abstract

The utility model belongs to an air-pressure detection type fixture of a special manipulator of a plastic-molding machine. The fixture mainly includes a casing, an air pipe I on the casing is communicated with a work surface of an air cylinder body, an air pipe II parallel to the air pipe I and on the same side as the air pipe I is arranged on the casing, an air pipe III parallel to the air pipe I and on the same side as the air pipe I is arranged on the casing, and the air pipe I, the air pipe II and the air pipe III are all connected with the air cylinder body. Through an air-pressure detection device and a pneumatic electromagnetic valve, the air-pressure detection type fixture achieves the purposes of simple structure, high empty-fixing precision, long service life, etc.

Description

A kind of air pressure detects anchor clamps

Technical field:

The utility model relates to manipulator, particularly the air pressure detection type anchor clamps of plastic molding press special manipulator.

Technical background:

At present, each manipulator producer adopts the anchor clamps great majority to be the magnet ring displacement on the magnetic reed switch detection anchor clamps cylinder piston on the market; A part detects anchor clamps for differential air pressure.Below make contrast for employed manipulator fixture type, operation principle and defective on the present market, as shown in the table:

Type	Operation principle	Product defects
Type	Operation principle	Product defects	Magnetic reed switch induction type anchor clamps	Detect the displacement situation of anchor clamps cylinder body inner carrier upper magnetic ring by magnetic reed switch, determine whether the situation of real gripping to object	1. when the gripping article varied in size, the piston position earthquake need vary in size according to object and adjust the position of magnetic reed switch, and was extremely inconvenient.2. from different with magnetic reed switch service life and need often to change at magnet ring.3. the precision of gripping can not be finely tuned.
Pressure differential detection formula anchor clamps	The pressure reduction of air pressure changes the situation that determines whether real gripping one object during by the descending gripping object of anchor clamps cylinder	1. have leakage situation and air pressure when detecting precisely when the sealing ring of anchor clamps cylinder piston, the false alarm situation occurs.2. must work simultaneously when checkout gear cylinder and anchor clamps cylinder move at every turn, built-in spring can rupture after fatigue, causes and can't normally detect.3. there is service life in the mechanical type microswitch of checkout gear employing, needs periodic replacement.	Magnetic reed switch induction type anchor clamps

Summary of the invention:

At the shortcoming that above-mentioned prior art exists, the inventor through experimental demonstration repeatedly, designs the utility model according to being engaged in this area working experience for many years: air pressure detects the formula anchor clamps.It has simple in structure, detects the empty folder of anchor clamps precision height, characteristics such as long service life.

Air pressure detects the formula anchor clamps and comprises anchor clamps, pressure test device, and air-operated solenoid valve three parts are formed, and its main architectural feature is:

A kind of air pressure detects anchor clamps, comprises housing, has tracheae one to communicate with the working face of cylinder block on the housing, also have tracheae two and the tracheae one parallel and side that coexists on the housing, also have tracheae three and a coexist side also parallel on the housing with tracheae one, tracheae one, tracheae two all is connected with cylinder block with tracheae three.

In housing, be provided with cylinder block and piston rod.

Housing below be connected with intermediate plate.

Tracheae three gentle pressure-controlled system connectivity.

Description of drawings:

Fig. 1 is that the utility model embodiment air pressure detects principle schematic.

Fig. 2 is the checking device schematic diagram of the utility model embodiment.

Fig. 3 is the utility model embodiment working state schematic representation.

Fig. 4 opens schematic diagram for the utility model embodiment duty.

The specific embodiment:

The utility model is that a kind of air pressure detects the formula anchor clamps, comprises anchor clamps, pressure test device, and air-operated solenoid valve, its requirement is to require to accurately detect anchor clamps when anchor clamps work each time whether normal gripping is to object, to guarantee its security.

Air pressure detects the formula anchor clamps and comprises anchor clamps, pressure test device, and air-operated solenoid valve three parts are formed, and play main architectural feature to be:

A kind of air pressure detects anchor clamps, comprise housing 27, there is tracheae 1 to communicate on the housing 27 with the working face of cylinder block 5, also have tracheae 2 24 and the tracheae one 23 parallel and sides that coexist on the housing 27, also have tracheae 3 25 and a coexist side also parallel on the housing 27 with tracheae 1, tracheae 1, tracheae 2 24 all is connected with cylinder block 6 with tracheae 3 25.

In housing 27, be provided with cylinder block 5 and piston rod 6.

Housing 27 below be connected with intermediate plate 11.

What be communicated with tracheae 3 25 is pneumatic control system 26.

Accompanying drawing 1 is depicted as the fundamental diagram that air pressure detects the formula anchor clamps, sets forth its operation principle according to gas circuit shown in the figure:

1. at the state of folding up, air valve does not have the signal input, active force by spring is in pressure gas source P and the gripping air admission hole communicates, feed to the anchor clamps cavity of resorption thus, compressed air promotes clamp piston 2 toward up, at clamp piston 2, clamp piston bar 6 in up, up together the finishing of intermediate plate 11, small rod 12, attaching nut 8 and clamp piston bar 6 folds up action, and the gas of clamp piston 2 epicoeles is put folder air inlet and R2 exhaust by gripping air admission hole in the anchor clamps cylinder capping 1 and air-operated solenoid valve simultaneously.

2. empty folder state, air valve has the signal input, promoting spool by the electromagnetic force effect is in the P hole and puts the state that folder air inlet gripping air admission hole and R1 communicate, compressed air arrives air valve gripping air admission hole by air valve P hole, arrive the gripping air admission hole in the cylinder capping of anchor clamps cylinder block by tracheae by air valve gripping air admission hole hole, compressed air promotes clamp piston 2 toward descending, in the inside of clamp piston bar 6 air flue being arranged---air flue 14 in the clamp piston, when going downwards to bottommost, its degree of depth and clamp piston 2 can press the detection steam vent just to be in same position with the empty gas enclosure on the anchor clamps cylinder block, when clamp piston 2, when clamp piston bar 6 goes downwards to bottommost, intermediate plate 11 is in complete closure state, when being empty folder state (not having object to be clipped to), compressed air is pressed by air flue in the clamp piston bar 14 and empty gas enclosure and is detected the air admission hole that detects that steam vent enters pressure test device, compression is held gas and is overcome the interior spring resistance that detects piston rod 18 upper ends of pressure test device (only needing the 0.5kgf/cm2 air pressure to get final product against the force of the spring), promote the interior piston rod of pressure test device to up, when be up to be fixed on the induction iron plate 16 that detects on the piston rod 18 can be fixed on 19 perception of inductive switch on the pressure test device time (distance of reaction is 2-3mm) finish the testing of empty folder, inductive switch 19 sends empty folder signal and gives control system.

3. safe gripping state, air valve has the signal input, promote spool by the electromagnetic force effect and be in P hole and gripping air admission hole hole, the state that R1 and gripping air admission hole communicate, compressed air arrives the air valve hole by air valve P hole, put the folder air inlet arrives the cylinder capping of anchor clamps cylinder block 5 by tracheae gripping air admission hole by air valve, under the effect of compressed air motive force, clamp piston 2, clamp piston bar 6, the attaching nut 8, small rod 12, intermediate plate 11 is toward descending, carry out the action of gripping object, (article diameters is greater than 1.5mm when clipping to object,), because object is clipped to by intermediate plate 11, clamp piston 2 can not be descended to the bottom, air flue 14 can not press the detection exhaust outlet to communicate with the empty gas enclosure of anchor clamps cylinder block 5 in the clamp piston bar like this, pressure test device can not worked, and promptly the inductive switch on the pressure test device 19 can not send empty folder signal, shows the normal gripping object of anchor clamps.

(1) air pressure checking device:

Accompanying drawing 2 is depicted as the structure chart of checking device.

Checking device comprises and detects cylinder block 5, is provided with in detecting cylinder shell and detects cylinder block 5, detects cylinder piston rod 18 and detect cylinder back-moving spring 17, detects and detects sealing ring 22 and induction iron plate 16 on the cylinder piston rod 18.Detecting has one to detect air inlet and communicate with the working face that detects piston rod 18 on the housing, detect cylinder block 5 upsides and detect cylinder head 20.Also be fixed with inductive switch 19 on the checking device.

By pneumatic diagram shown in the accompanying drawing 1 as can be known, as long as (dynamics that overcomes the back-moving spring resistance is 0.5kgf/mm2 greater than 0.5kgf/mm2 the time for the operating pressure of anchor clamps, the general service pressure of anchor clamps is 4～6kgf/mm2), when empty folder situation appears in anchor clamps, gas is pressed the detection steam vent to feed through conduit from the empty gas enclosure on the anchor clamps cylinder body and is detected air inlet, thereby promote to detect piston rod 18 to up, make in the up induction range that enters into inductive switch 19 of induction iron plate 16 the empty folder of inductive switch 19 outputs signals.

(2) anchor clamps cylinder:

Accompanying drawing 3 is depicted as the folder state of putting and the empty folder state of anchor clamps group.

In working pressure range (4～6kgf/mm2), put the air inlet of folder air inlet, clamp piston 2 drives clamp piston bar 6 and rises, small rod 12, intermediate plate 11 swing certain radian, two intermediate plates 11 open, anchor clamps are (state before the work) in a state of nature, and anchor clamps cylinder epicoele gas feeds two-position-five-way solenoid valve and discharge from the gripping air admission hole by conduit.Do not have gas to enter checking device during exhaust, checking device can not exported empty folder signal; During work, switching solenoid valve, gas feeds the anchor clamps upper chamber of air cylinder by putting folder air inlet mouth through conduit, cylinder gripping air admission hole, promote clamp piston 2 and drive 6 declines of clamp piston bar, small rod 12, intermediate plate 11 swing certain radian, 11 beginnings of two intermediate plates are closed, and anchor clamps are in running order.The direct gas port when putting folder of cavity of resorption air in the anchor clamps cylinder feeds magnetic valve and discharges through conduit.

When anchor clamps were in running order, following two kinds of operating modes may appear:

1, empty folder state: when the working diameter that does not have gripping to arrive workpiece or institute's gripping allows diameter of work less than anchor clamps are minimum, empty folder promptly can occur when anchor clamps are worked.At this moment, clamp piston bar 6 sealing rings 13 on the clamp piston bar 6 drop to the sky gas enclosure and press the detection exhaust outlet, the air-flow air flue 14 in clamp piston bar 6 that enters from the gripping air admission hole leads to sky gas enclosure pressure detection exhaust outlet, and feed the air inlet that detects of checking device by conduit, promotion detects piston rod 6 and drives induction iron plate 16 to up, enter the induction range of the inductive switch 19 that is fixed on the checking device, the empty folder of inductive switch 19 outputs signal.

2, clamp position: gripping is when the diameter of work allows working diameter more than or equal to anchor clamps are minimum when anchor clamps are worked, be clamping. at this moment, clamp piston rod seal circle 13 drops to the sky gas enclosure and presses detection exhaust outlet top, the air inlet of gripping air admission hole, the gas of air flue 14 can not be pressed from empty gas enclosure and be detected the exhaust outlet discharge in the clamp piston of the flowing through bar, promptly detecting air inlet does not have gas to enter, and induction iron plate 16 remains static, and inductive switch 19 is not exported empty folder signal.

(3) air pressure detects the adjustment of formula anchor clamps:

The rotation angle range that lacks pressure detection formula anchor clamps cylinder intermediate plate 11 in theory is 0～60 degree, but in practical work process, we can adjust the maximum opening angle between the intermediate plate 11.Be reflected on the anchor clamps, only need the empty gas enclosure of control to press the exhaust and the not exhaust that detect exhaust outlet to get final product.The upper and lower stroke that only need adjust clamp piston 2 during adjustment gets final product.When adjusting the maximum opening angle of 11 of intermediate plates, allow the air inlet of gripping air admission hole, intermediate plate 11 is clamped benchmark, spanner is pulled the hexagonal on the clamp piston bar 6, left-handed decline, dextrorotation is risen, and it is upper and lower to seal and empty gas enclosure pressure detection just stuffiness of exhaust outlet (critical point) to adjust clamp piston bar 6, and locking gripping precision adjusting nut 7 gets final product.By regulating gripping precision adjusting nut 7, can also finely tune the opening angle of anchor clamps intermediate plate 11.

Because the utility model has been taked above technical scheme, it is compared with existing other technology and has the following advantages:

1. simple in structure, easy to maintenance;

2. gripping accuracy of detection height, the possibility that does not exist flase drop to survey;

3. clamping precision height, the clamping precision is easy to adjust, and can carry out the fine setting of anchor clamps angle;

4. production capacity height, the efficient height;

5. long service life can reach more than 10 times of employed anchor clamps in the market.

In sum, be preferred embodiment of the present utility model, all changes of doing according to technical solutions of the utility model when the function that is produced does not exceed the scope of technical solutions of the utility model, all belong to protection domain of the present utility model.

Claims

1. an air pressure detects anchor clamps, its principal character is: comprise housing (27), there is tracheae one (23) to communicate on the housing (27) with the working face of cylinder block (5), housing (27) is gone up also has tracheae two (24) and tracheae one (23) the parallel and side that coexists, housing (27) is gone up also has tracheae three (25) and tracheae one (23) the also parallel and side that coexists, tracheae one (23), tracheae two (24) all is connected with cylinder block (5) with tracheae three (25).

2. air pressure according to claim 1 detects anchor clamps, it is characterized in that: be provided with cylinder block (5) and piston rod (6) in housing (27).

3. air pressure according to claim 1 detects anchor clamps, it is characterized in that: the below at housing (27) is connected with intermediate plate (11).

4. air pressure according to claim 1 detects anchor clamps, it is characterized in that: and tracheae three (25) connections is pneumatic control system (26).