CN216704960U - Pneumatic gluing gun capable of preventing glue overflow - Google Patents

Abstract

The utility model relates to an anti-glue-overflow pneumatic glue gun which comprises a gun barrel, a glue pushing cylinder, a push block, a pull rod, a brake assembly and an operating handle, wherein the pull rod, the brake assembly and the operating handle are connected with the glue pushing cylinder, a glue barrel cavity and a gas storage cavity used for storing gas are arranged in the gun barrel, the anti-glue-overflow mechanism comprises an anti-glue-overflow cylinder, the anti-glue-overflow cylinder is arranged at the front end of the glue pushing cylinder, the push block is arranged at the front end of the anti-glue-overflow cylinder, the control mechanism controls the telescopic action of the anti-glue-overflow cylinder through the anti-glue pipe, and the brake assembly is used for controlling the stop or the action of the pull rod. The glue gun has the advantages of simple structure, convenient operation, capability of storing compressed air, no need of constantly connecting an inflating device during working, no interference of an air source line, more portability, capability of coating glue operation when an air source is deficient, capability of not only separating from an external air source for independent working, but also capability of timely releasing pressure after the glue coating is finished to prevent the glue gun from overflowing.

Description

Pneumatic gluing gun capable of preventing glue overflow

Technical Field

The utility model relates to an anti-glue-overflow pneumatic glue gun, and belongs to the technical field of glue guns.

Background

The glue gun is a tool for applying glue or extruding glue, is used for pushing out the glue in the glue cylinder for gluing operation, and is widely applied to the fields of building industry, decoration industry, automobile manufacturing and maintenance, glass curtain wall engineering and the like. The glue gun has the glue overflow prevention function in order to prevent the glue cylinder from continuously overflowing glue after stopping operation except for meeting the normal glue coating operation.

At present, glue guns on the market are mainly classified into three types, one type is a manual glue gun, the working principle is that a manual operation handle pushes a push rod to pressurize and discharge glue in a glue barrel, after manpower is removed, in order to prevent glue overflow caused by residual push force of the push rod, a reverse-push spring is designed to enable the push rod to be withdrawn backwards so as to prevent glue overflow; the second type is an electric glue gun, a motor and a speed reducer are used for pushing a push rod to further push the inner plug of a glue barrel to pressurize and discharge glue, and after glue discharging is finished, the motor is controlled to rotate reversely to enable the push rod to unload residual thrust to achieve the purpose of preventing glue overflow; the third type of existing pneumatic glue gun directly pushes the glue barrel to be blocked out by compressed air, and after glue discharging is finished, glue overflow is prevented by releasing all compressed air in the glue gun.

Although present pneumatic gluey rifle is for electronic gluey rifle, moreover, the steam generator is simple in structure, low cost, for manual gluey rifle reduction workman intensity of labour, the efficiency of beating glue has been improved, present pneumatic gluey rifle needs outside air supply to continuously carry out the air feed at the during operation, if meet under the condition that the job site does not have outside air supply or outside air supply can't work, pneumatic gluey rifle then can't use, very big influence construction progress, the event needs one kind and can the rubber coating operation under the condition that the job site does not have outside air supply or outside air supply can't work, can in time solve the pneumatic gluey rifle of excessive gluey problem after the rubber coating finishes simultaneously.

Disclosure of Invention

Aiming at the defects in the prior art, the utility model provides the glue overflow prevention pneumatic glue gun which is simple in structure and convenient to operate, can work independently without an external air source on a construction site, and can solve the problem of glue overflow.

The technical scheme for solving the technical problems is as follows: a pneumatic glue gun capable of preventing glue overflow comprises a gun barrel, a glue pushing cylinder, a push block, a pull rod, a brake assembly and an operating handle, wherein the glue pushing cylinder is arranged in the gun barrel, the pull rod is connected with the glue pushing cylinder, the brake assembly is used for controlling the stop or the action of the pull rod, the front end and the rear end of the gun barrel are respectively provided with a front end cover and a rear end cover, a glue barrel cavity used for containing the glue barrel and an air storage cavity used for storing air are arranged in the gun barrel, an air inlet is arranged on the air storage cavity, a cylinder sealing guide piece is arranged in the gun barrel, and the brake assembly acts on the pull rod extending out of the rear end cover;

still include anti-overflow and glue mechanism and control mechanism, anti-overflow glues the mechanism and includes anti-overflow and glues the cylinder, anti-overflow glues the cylinder and includes anti-overflow and glues the cylinder body and locate the internal anti-overflow of anti-overflow and glue the cylinder and glue the piston, anti-overflow glues the cylinder body setting and is in push away the front end of gluing the cylinder, the ejector pad with anti-overflow glues the piston connection, control mechanism passes through anti-overflow rubber tube control the flexible action of anti-overflow and glue the cylinder, the anti-overflow rubber tube sets up push away in the gluey cylinder.

The utility model has the beneficial effects that: the construction personnel can conveniently inflate the glue gun through the air inlet, the glue gun can be directly connected with an external air source for gluing operation, certainly, under the condition that no external air source or external air source can not work in a construction site, the brake assembly can not lock the pull rod under the action of compressed air in the air storage cavity, the glue pushing cylinder moves forwards under the action of the compressed air in the air storage cavity, the anti-overflow air cylinder and the push block at the front end of the glue pushing cylinder move forwards, the push block acts on the rear end of the glue cylinder placed in the glue cylinder cavity, the glue pushing cylinder can glue the rear blocking and pressurizing glue spraying nozzle of the glue cylinder, the construction operation is carried out by utilizing the compressed air stored in the air storage cavity for gluing, the construction progress is not influenced, when the gluing is finished, the control mechanism acts, the brake assembly locks the pull rod, the glue pushing cylinder stops moving forwards, the control mechanism controls the compressed air of the anti-overflow air cylinder to be released, the glue overflow preventing piston loses thrust to achieve the purpose of preventing glue overflow. The glue gun has the advantages of simple structure, convenient operation, capability of storing compressed air, no need of constantly connecting an inflating device during working, no interference of an air supply line, portability, capability of coating glue operation when an air source is deficient, capability of not only separating from an external air source to work independently, but also capability of releasing pressure in time after the glue coating is finished to prevent the glue gun from overflowing.

On the basis of the technical scheme, the utility model can be further improved as follows.

Further, control mechanism includes control cylinder and anti-overflow glue valve, operating handle includes fixed handle and activity handle, control cylinder sets up on the fixed handle, control cylinder's piston rod with the activity handle is articulated, the anti-overflow glue valve sets up on the rear end cap, control cylinder pass through control line with the valve pocket of anti-overflow glue valve is connected, the valve pocket of anti-overflow glue valve with the anti-overflow rubber tube is connected under the control cylinder effect, the anti-overflow glue valve is crowded gluey during operation intercommunication the gas storage chamber with the anti-overflow glue cylinder and release the pressure of preventing the overflow cylinder when crowded gluey state of non-or gas filled state.

The adoption of the further scheme has the beneficial effects that the movable handle compresses the control cylinder to provide compressed air, the compressed air enters the brake air passage through the control pipeline to control the action of the brake assembly, so that a gap is formed between the brake assembly and the pull rod, the pull rod can act along with the glue pushing cylinder, and the forward movement speed of the pull rod can be adjusted by matching the brake assembly and the pull rod; compressed air can also enter the anti-glue-overflow valve cavity through the anti-glue-overflow air passage to push the anti-glue-overflow valve core upwards, and the anti-glue-overflow valve core is communicated with the air storage cavity and the anti-glue-overflow pipe to provide compressed air for the anti-glue-overflow cylinder to push the anti-glue-overflow cylinder to move forwards; when glue discharging is finished, the manual control cylinder returns, the glue overflow prevention valve core can return under the pushing of compressed air in the air storage cavity, the glue overflow prevention air pipe and the pressure relief hole are communicated, and the glue overflow prevention cylinder moves backwards to release the residual thrust of the glue pushing cylinder to realize the glue overflow prevention function.

Further, the valve core is glued to the anti-overflow of valve including the valve pocket is glued to the anti-overflow and locating in the valve pocket is glued to the anti-overflow, the top of the valve pocket is glued to the anti-overflow is equipped with the pressure release hole, the anti-overflow rubber tube with the upper portion intercommunication in the valve pocket is glued to the anti-overflow, the gas storage chamber with the middle part intercommunication in the valve pocket is glued to the anti-overflow, be equipped with ring platform and lower ring platform on the anti-overflow rubber valve core, go up the ring platform and be equipped with the annular that is used for communicateing gas storage chamber and anti-overflow rubber tube down between the ring platform, the external diameter of ring platform is greater than down go up the external diameter of ring platform.

Adopt above-mentioned further scheme's beneficial effect to be equipped with the sealing washer respectively on last ring platform and the lower ring platform. Form the ring chamber between annular and the anti-overflow gluey valve chamber, the compressed air in anti-overflow gluey valve core shifts up back gas storage chamber passes through the air inlet and gets into the ring chamber, ring chamber upper end intercommunication anti-overflow rubber tube, make the pressure that pushes away gluey cylinder the same with the pressure of anti-overflow gluey piston, there is the space throughout in the anti-overflow gluey cylinder unable compressed, when the activity handle loosens, brake assembly locking pull rod, push away gluey cylinder and stop the antedisplacement, the anti-overflow gluey valve core shifts down to the lower extreme, the gas circuit is cut off between gas storage chamber and the anti-overflow rubber tube, anti-overflow rubber tube and pressure release hole intercommunication, the compressed air of anti-overflow gluey cylinder is released, the anti-overflow gluey piston loses thrust and plays the purpose that prevents overflow gluey.

Further, the brake subassembly includes a pair of brake block, acts on a pair of brake connecting rod and the drive brake connecting rod pivoted brake cylinder of brake block respectively, the upper end of brake connecting rod pass through the fixed pin with the rear end cap is connected, the lower extreme with brake cylinder's piston rod is connected, the rear side of rear end cap is equipped with fixed cover plate, be equipped with the direction passageway that is used for the brake block translation between rear end cap and the fixed cover plate, the direction passageway is by setting up last limiting plate and lower limiting plate between rear end cap and the fixed cover plate form, control tube with the inner chamber intercommunication that brake cylinder connects, brake cylinder's exocoel with the gas storage chamber gas circuit intercommunication in gas storage chamber.

The beneficial effect who adopts above-mentioned further scheme is that, have on the brake block with pull rod complex notch, have the fixed pin on the rear end cap, the upper end of a pair of brake connecting rod is articulated with the fixed pin respectively, the lower extreme is connected with brake cylinder's piston rod, brake cylinder can adopt two cylinders or adopt two piston rod cylinder, the gas circuit overall arrangement is simpler. The brake principle is controlled by two gas circuits, one is that the compressed air of the gas storage cavity acts on the outer cavity of the brake cylinder through the gas circuit of the gas storage cavity, and the brake force for pressing the brake block by the brake connecting rod is provided. The other path is provided by a control cylinder, when the control cylinder provides compressed air to act on an inner cavity of the brake cylinder, the pressure of a control air source is used for counteracting the thrust of an air source of an air storage cavity acting on the outer side of the brake cylinder, so that the pressure of the brake pad is reduced, the braking force of the brake pad restraining ejector rod is reduced, the telescopic action of the brake cylinder is realized by matching a control pipeline with the air channel of the air storage cavity to control the action of a piston rod, a pair of brake connecting rods are driven to rotate by taking a fixed pin as a fulcrum through the telescopic action of the brake cylinder, the brake connecting rods respectively act on the outer ends of the brake pad to press the brake block to provide the braking force for the pull rod or keep away from the brake block, the brake block is not pressed any more, large braking effect cannot be generated on the pull rod, the pull rod can be attached to the pull rod without the braking force, the glue extruding speed of the glue pushing cylinder is adjusted by adjusting the force of a pressing operation handle during operation, the gluing speed is matched with the pressing force in real time, the gluing difficulty of an operator is reduced, and the situation that glue is broken or is wasted due to too coarse gluing of the adhesive tape is avoided.

Furthermore, a brake base is further arranged on the rear end cover, an anti-glue-overflow preventing air passage communicated with the anti-glue-overflow valve, a brake air passage communicated with an inner cavity of the brake cylinder and an air storage cavity air passage connected with an outer cavity of the air storage cavity and the brake cylinder are arranged on the brake base, and the anti-glue-overflow preventing air passage or the brake air passage is communicated with the control pipeline.

The beneficial effects of adopting above-mentioned further scheme are that, the pressure that the compressed air through the gas storage chamber provided of resetting of brake cylinder resets, and the brake seat makes things convenient for the installation location and the subsequent maintenance of anti-overflow valve core on the one hand, and on the other hand is convenient for prevent processing, the connection and the maintenance of overflow pipeline and brake pipeline.

Furthermore, an air supply path communicated with the air inlet and the air source is arranged on the rear end cover and/or the brake seat.

The brake seat has the advantages that the brake seat is convenient for installation and positioning and subsequent maintenance of the anti-overflow valve core on one hand, and is convenient for processing, connecting and maintaining the air supply path on the other hand.

Furthermore, an inflation channel is arranged in the operating handle, an inflation opening is arranged at the inlet of the inflation channel, and the outlet of the inflation channel supplies air to the air storage cavity through an inflation pipeline and a quick connector.

Adopt above-mentioned further scheme's beneficial effect is, the inflation inlet adopts one-way valve formula inflation inlet, then communicates the pipeline of outside air supply with the inflation inlet on the activity handle when needing to aerify, alright in order to carry out the gas storage in the gas receiver, gas storage process, brake subassembly acts on the pull rod, locks the pull rod and avoids gas storage process to push away gluey cylinder antedisplacement.

Furthermore, the control pipeline and the inflation pipeline adopt a double-layer pipe structure.

The beneficial effect of adopting the above-mentioned further scheme is that, control line sets up the inside of gas charging line. Only need a pipe fitting can, reduce the quantity of pipe fitting, avoid mixed and disorderly interference each other between the pipeline, can satisfy gas storage chamber gas storage, brake subassembly and to the control requirement to anti-overflow cylinder simultaneously again.

Furthermore, a piston rod of the control cylinder is sleeved with a brake spring, and the brake spring is arranged between the movable handle and the fixed handle.

The beneficial effect who adopts above-mentioned further scheme is that, thereby the cooperation gas storage chamber realizes the pull rod of locking in time that resets of brake block in the reseing of the flexible handle that brake spring can be supplementary.

Furthermore, an air outlet is formed in the rear end cover, and an air release valve is arranged at the air outlet.

Adopt above-mentioned further scheme's beneficial effect be, when needs gassing, in time discharge the air in the air receiver through the switching of bleeder valve control gas storage chamber gas outlet.

Furthermore, the operating handle is connected with the gun barrel through a barrel hoop, and a quick pressing screw is arranged on the barrel hoop.

The beneficial effects of adopting above-mentioned further scheme are that, realize being connected between operating handle and the gun section of thick bamboo through the barrel hoop, it is convenient to connect, and the position convenient and fast of barrel hoop on the gun section of thick bamboo is adjusted through the quick-pressing screw to the barrel hoop.

Further, the cylinder sealing guide part adopts a cylinder sleeve.

Adopt above-mentioned further scheme's beneficial effect is, push away gluey cylinder can act on the back stifled of the packing element of arranging in the rubber gun section of thick bamboo under compressed air's effect, in order to further guarantee the pressure of the compressed air in the air receiver, set up the sealed guide piece like the cylinder liner on the internal surface of gun section of thick bamboo, further increase the leakproofness of air receiver.

Drawings

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

FIG. 2 is a schematic diagram of the right view structure of the present invention;

FIG. 3 is a schematic cross-sectional view illustrating the glue-extruding state according to the present invention;

FIG. 4 is an enlarged view of a portion of FIG. 3 at A;

FIG. 5 is an enlarged view of a portion of FIG. 3 at B;

FIG. 6 is a schematic cross-sectional view of the present invention in an inflated or non-squeezed condition;

FIG. 7 is an enlarged view of a portion of FIG. 6 at C;

FIG. 8 is an enlarged view of a portion of FIG. 6 at D;

FIG. 9 is a schematic perspective view of the present invention;

FIG. 10 is a schematic structural view of a brake disc of the present invention;

FIG. 11 is a schematic cross-sectional view of the brake cylinder of the present invention;

in the figure, 1, a gun barrel; 2. fixing a handle; 3. a movable handle; 4. a barrel hoop; 5. quickly pressing the screw; 6. a brake seat; 7. an anti-glue-overflow valve core; 8. a pull rod; 9. a glue pushing cylinder; 10. a rear end cap; 11. a sealing guide; 12. a control pipeline; 13. an inflation pipeline; 14. an anti-overflow rubber tube; 15. an anti-overflow glue cylinder; 16. an inflation inlet; 17. a push block; 18. a rubber cylinder; 19. a front end cover; 20. a glue coating nozzle; 22. a quick coupling; 23. a deflation valve; 24. a brake spring; 25. an anti-glue-overflow valve cavity; 26. a pressure relief vent; 27. a ring groove; 28. a gas storage cavity gas circuit; 29. an anti-glue overflow air channel; 30. a brake air passage; 31. controlling the cylinder; 32. post-plugging; 33. a brake pad; 34. a brake connecting rod; 35. a brake cylinder; 351. an inner cavity; 352. an outer cavity; 36. a fixing pin; 37. fixing the cover plate; 38. an upper limiting plate; 39. a lower limiting plate.

Detailed Description

The principles and features of this invention are described below in conjunction with examples, which are set forth to illustrate, but are not to be construed to limit the scope of the utility model.

As shown in fig. 1-11, a glue overflow preventing pneumatic glue gun comprises a gun barrel 1, a glue pushing cylinder 9, a push block 17, a pull rod 8 connected with the glue pushing cylinder 9, a brake assembly for controlling the stop or the action of the pull rod, and an operating handle, which are arranged in the gun barrel 1, wherein a front end cover 19 and a rear end cover 10 are respectively arranged at the front end and the rear end of the gun barrel 1, a glue barrel cavity for accommodating the glue barrel 18 and an air storage cavity for storing air are arranged in the gun barrel 1, an air inlet is arranged on the air storage cavity, a cylinder sealing guide 11 is arranged in the gun barrel 1, and the brake assembly acts on the pull rod 8 extending out of the rear end cover 10;

still include anti-overflow and glue mechanism and control mechanism, anti-overflow glues mechanism includes anti-overflow and glues cylinder 15, anti-overflow glues cylinder 15 including anti-overflow glues the cylinder body and locate the internal anti-overflow of anti-overflow glues the cylinder and glue the piston, anti-overflow glues the cylinder body setting and is in push away the front end of gluing cylinder 9, the rear end of ejector pad 17 pass anti-overflow glues the cylinder body with anti-overflow glues the piston connection, control mechanism passes through anti-overflow rubber tube 14 control the flexible action of anti-overflow and glue cylinder 15, anti-overflow rubber tube 14 sets up push away in the gluey cylinder 9.

Control mechanism includes control cylinder 31 and anti-overflow gluey valve, operating handle includes fixed handle 2 and activity handle 3, control cylinder 31 sets up fixed handle 2 is last, control cylinder 31 the piston rod with activity handle 3 is articulated, the anti-overflow gluey valve sets up on the rear end cap 10, control cylinder 31 through control line 12 with the valve pocket of anti-overflow gluey valve is connected, the valve pocket of anti-overflow gluey valve with anti-overflow rubber tube 14 is connected under the control cylinder 31 effect, the anti-overflow gluey valve is gluing the during operation intercommunication crowded the pressure that the anti-overflow cylinder was glued 15 and is released when crowded gluey state of non-in the gas storage chamber and anti-overflow. The movable handle 3 compresses the control cylinder 31 to provide compressed air, the compressed air enters the brake air channel 30 through the control pipeline 12 to control the brake assembly to act, so that a gap is formed between the brake assembly and the pull rod 8, the pull rod 8 can act along with the glue pushing cylinder 9, and the forward movement speed of the pull rod 8 can be adjusted by matching the brake assembly with the pull rod 8; compressed air can also enter the glue overflow prevention valve cavity 25 through the glue overflow prevention air passage 29 to push the glue overflow prevention valve core 7 upwards, and the glue overflow prevention valve core 7 is communicated with the air storage cavity and the glue overflow prevention pipe 14 to provide compressed air for the glue overflow prevention cylinder 15 to push the glue overflow prevention cylinder 15 to move forwards; when glue discharging is finished, the manual control cylinder 31 returns, the glue overflow preventing valve core 7 can return under the pushing of compressed air in the air storage cavity to communicate the glue overflow preventing air pipe and the pressure relief hole 26, and the glue overflow preventing cylinder 15 moves backwards to release the residual thrust of the glue pushing cylinder 9 to realize the glue overflow preventing function.

The valve is glued to anti-overflow glues valve case 25 and locates anti-overflow in the anti-overflow gluey valve case 25 and glues valve core 7, the top of anti-overflow gluey valve case 25 is equipped with pressure release hole 26, anti-overflow rubber tube 14 with the upper portion intercommunication of anti-overflow gluey valve case 25, the gas storage chamber with the middle part intercommunication of anti-overflow gluey valve case 25, be equipped with upper ring platform and lower ring platform on the anti-overflow gluey valve core 7, be equipped with the annular 27 that is used for communicateing gas storage chamber and anti-overflow rubber tube 14 between upper ring platform and the lower ring platform, the external diameter of lower ring platform is greater than the external diameter of upper ring platform. The upper ring platform and the lower ring platform are respectively provided with a sealing ring. Form the ring chamber between annular 27 and the anti-overflow gluey valve chamber 25, the compressed air in anti-overflow gluey valve core 7 moves up the back gas storage chamber gets into the ring chamber through the air inlet, ring chamber upper end intercommunication anti-overflow rubber tube 14, make the pressure that pushes away gluey cylinder 9 the same with the pressure of anti-overflow gluey piston, the internal space that exists all the time of anti-overflow gluey cylinder can't be compressed, when activity handle 3 unclamps, brake subassembly locking pull rod 8, it stops the antedisplacement to push away gluey cylinder 9, anti-overflow gluey valve core 7 moves down to the bottom, the gas circuit is cut off between gas storage chamber and the anti-overflow rubber tube 14, anti-overflow rubber tube 14 communicates with pressure release hole 26, the compressed air of anti-overflow gluey cylinder 15 is released, the anti-overflow gluey piston loses thrust and plays the purpose that prevents the overflow gluey.

Brake subassembly includes a pair of brake block 33, acts on a pair of brake connecting rod 34 and the drive brake connecting rod pivoted brake cylinder 35 of brake block 33 respectively, the upper end of brake connecting rod pass through fixed pin 36 with the rear end cap is connected, the lower extreme with the piston rod of brake cylinder 35 is connected, the rear side of rear end cap 10 is equipped with fixed apron 37, be equipped with the direction passageway that is used for the brake block translation between rear end cap and the fixed apron, the direction passageway is by setting up stopper 38 and lower stopper 39 formation on between rear end cap and the fixed apron, the control tube way with the inner chamber 351 intercommunication that brake cylinder connects, brake cylinder's exocoel 352 with the gas storage chamber 28 intercommunication in gas storage chamber. The brake block has the notch with pull rod complex on, is equipped with the fixed pin on the rear end cap, and the upper end of a pair of brake connecting rod is articulated with the fixed pin respectively, and the lower extreme is connected with the piston rod of brake cylinder, and the brake cylinder can adopt two cylinders or adopt two piston rod cylinder, and the gas circuit overall arrangement is simpler. The brake principle is controlled by two gas circuits, one is that the compressed air of the gas storage cavity acts on the outer cavity of the brake cylinder through the gas circuit of the gas storage cavity, and the brake force for pressing the brake block by the brake connecting rod is provided. The other path is provided by a control cylinder, when the control cylinder provides compressed air to act on an inner cavity of the brake cylinder, the pressure of a control air source is used for counteracting the thrust of an air source of an air storage cavity acting on the outer side of the brake cylinder, so that the pressure of the brake pad is reduced, the brake force of the brake pad restraining ejector rod is reduced, the telescopic action of the brake cylinder is that a control pipeline is matched with an air path of the air storage cavity to control the action of a piston rod, a pair of brake connecting rods are driven to rotate by taking a fixed pin as a fulcrum through the telescopic action of the brake cylinder, the brake connecting rods respectively act on the outer ends of the brake pads to press the brake blocks to provide the brake force for the pull rod or keep away from the brake blocks, the brake blocks are not pressed again, large brake action cannot be generated on the pull rod, the pull rod can be naturally attached to the pull rod without the brake force, and the glue extruding speed of the glue pushing cylinder is adjusted by adjusting the force of an operating handle during operation, the gluing speed is matched with the pressing force in real time, the gluing difficulty of an operator is reduced, and the situation that glue is broken or is wasted due to too coarse gluing of the adhesive tape is avoided.

The rear end cover 10 is further provided with a brake base 6, the brake base 6 is provided with an anti-glue overflow air passage 29 communicated with the anti-glue overflow valve, a brake air passage 30 communicated with an inner cavity of the brake cylinder and an air storage cavity air passage connecting the air storage cavity and an outer cavity of the brake cylinder, and the anti-glue overflow air passage 29 or the brake air passage 30 is communicated with the control pipeline 12. The reset of the brake cylinder is realized by the pressure provided by the compressed air of the air storage cavity, the brake seat 6 is convenient for the installation and positioning and the subsequent maintenance of the anti-overflow valve core on the one hand, and is convenient for the processing, the connection and the maintenance of the anti-overflow pipeline and the brake pipeline on the other hand.

And the rear end cover 10 and/or the brake seat 6 are/is provided with an air supply path for communicating the air inlet with an air source. The brake seat 6 is convenient for installation and positioning and subsequent maintenance of the anti-overflow valve core on one hand, and is convenient for processing, connecting and maintaining the air supply path on the other hand.

An inflation channel is arranged in the operation handle, an inflation opening 16 is arranged at the inlet of the inflation channel, and the outlet of the inflation channel supplies air to the air storage cavity through an inflation pipeline 13 and a quick connector 22. The inflation inlet 16 adopts a one-way valve type inflation inlet 16, when inflation is needed, a pipeline of an external air source is communicated with the inflation inlet 16 on the movable handle 3, so that air can be stored in the air cylinder, in the air storage process, the brake assembly acts on the pull rod 8, and the pull rod 8 is locked to prevent the air cylinder 9 from moving forwards in the air storage process.

The control pipeline 12 and the inflation pipeline 13 are of a double-layer structure. The control line 12 is arranged inside the charging line 13. Only need a pipe fitting can, reduce the quantity of pipe fitting, avoid mixed and disorderly interference each other between the pipeline, can satisfy gas storage chamber gas storage, brake subassembly and to the control requirement to anti-overflow cylinder simultaneously again.

A piston rod of the control cylinder 31 is sleeved with a brake spring 24, and the brake spring 24 is arranged between the movable handle 3 and the fixed handle 2. The brake spring 24 can assist the reset of the movable handle 3, and the reset of the brake pad 33 is realized, so that the pull rod 8 is locked in time.

The rear end cover 10 is provided with an air outlet, and the air outlet is provided with a release valve 23. When the air needs to be discharged, the air in the air storage cylinder is discharged in time by controlling the opening and closing of the air outlet of the air storage cavity through the air discharge valve 23.

The operating handle is connected with the gun barrel 1 through a barrel hoop 4, and a quick-pressing screw 5 is arranged on the barrel hoop 4. The barrel hoop 4 is used for realizing the connection between the operating handle and the gun barrel 1, the connection is convenient, and the position of the barrel hoop 4 on the gun barrel 1 can be conveniently and quickly adjusted by the barrel hoop 4 through the quick pressing screw 5.

The cylinder sealing guide 11 is a cylinder sleeve. The glue pushing cylinder 9 can act on the rear plug 32 of the glue cylinder 18 arranged in the glue gun barrel 1 under the action of compressed air, and in order to further ensure the pressure of the compressed air in the air storage barrel, a sealing guide part 11 such as a cylinder sleeve is arranged on the inner surface of the gun barrel 1, so that the sealing performance of the air storage cavity is further improved.

Gas storage cavity inflation stage: the quick-insertion inflation inlet 16 is connected with an air source to provide compressed air, the compressed air enters an outer air pipe of the double-layer air pipe through the fixed handle 2, is transmitted to a left air pipe of the brake base 6, and is then sent into the air storage cavity through an air supply path of the brake base 6 and the rear end cover 10.

Compressed air in the air storage cavity enters the annular cavity of the glue overflow prevention valve core 7 through the air hole, the diameters of two ends of the glue overflow prevention valve core 7 are different, the diameter of the lower end of the glue overflow prevention valve core 7 is large, the diameter of the upper end of the glue overflow prevention valve core is small, and the compressed air pushes the glue overflow prevention valve core 7 to be located at the lowest end of the valve hole. At the moment, the compressed air is sealed by the O-shaped ring and cannot enter the anti-overflow rubber tube 14 for inflating and deflating the anti-overflow rubber cylinder 15.

The gluing working stage: open the front end housing, place the packing element at the packing element intracavity, 3 promotion control cylinders 31 compressed air of control activity handle, compressed air gets into brake block 6 through double-deck tracheal inlayer gas circuit, get into 7 bottoms on the glue valve core of preventing overflowing through 6 right sides gas circuits on brake block, promote to prevent overflowing to glue the valve core 7 and shift up, the back is moved up on the glue valve core of preventing overflowing, annular 27 intercommunication gas storage chamber and anti-overflow rubber tube 14, the compressed air in gas storage chamber gets into the glue piston of preventing overflowing through the gas pocket and fills gassing anti-overflow rubber tube 14 in, and send to the sealed cavity of the glue piston of preventing overflowing, the glue piston of preventing overflowing moves forward, promote 18 crowded glues of packing element. 3 simultaneous control braking system of control activity handle, when control cylinder provides compressed air and acts on brake cylinder's inner chamber, the area of the air supply effect of control gas circuit is greater than the area of gas storage chamber gas circuit effect, the pressure of control gas supply is used for offsetting the thrust that gas storage chamber gas supply acts on the brake cylinder outside, make the pressure of brake block reduce, thereby reduce the braking force of brake block restraint ejector pin, loosen part pull rod 8's brake block 33, it shifts forward under the promotion of gas storage chamber compressed air to push away gluey cylinder 9, it shifts forward to drive the anti-overflow gluey piston simultaneously. Because the pressure of the compressed air, namely the compressed air of the air storage cavity, for pushing the glue pushing cylinder 9 to advance is the same as the pressure in the glue overflow prevention piston, in the advancing working process of the glue pushing cylinder 9, part of the brake pads 33 of the glue pushing cylinder 9 still stop the glue pushing cylinder from advancing, and the sealing cavity of the glue overflow prevention piston always has a space and cannot be compressed. A gap is reserved between the brake block 33 and the pull rod 8, compressed air acts on the glue pushing cylinder 9 and drives the pull rod 8 to move forwards, so that the push block 17 acts on the rear plug 32 of the glue barrel 18, and glue flows out of the glue coating nozzle 20 to perform glue coating operation.

And finishing the working stage: when the movable handle 3 is loosened, the control pipeline stops supplying air to the inner cavity of the brake cylinder, the brake cylinder resets under the pressure provided by the compressed air in the air storage cavity, the brake pad 33 locks the pull rod 8 under the action of the brake cylinder 35, the brake system stops and pushes the glue pushing cylinder 9 to move forwards, the compressed air in the cavity of the control cylinder 31 loses pressure, the glue overflow preventing valve core 7 is pushed to move downwards to the lowest end under the pushing of the compressed air in the air storage cavity again, the compressed air in the air storage cavity and the air passage of the glue overflow preventing piston are cut off, meanwhile, the air passage of the glue overflow preventing piston and the pressure relief hole 26 of the rear end cover 10 form a passage, the compressed air in the glue overflow preventing piston is released, and the glue overflow preventing piston loses thrust to achieve the purpose of preventing glue overflow.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (10)

1. The pneumatic glue gun capable of preventing glue overflow is characterized by comprising a gun barrel (1), a glue pushing cylinder (9) arranged in the gun barrel (1), a push block (17), a pull rod (8) connected with the glue pushing cylinder (9), a brake assembly and an operating handle, wherein the brake assembly is used for controlling the stop or the action of the pull rod, the front end and the rear end of the gun barrel (1) are respectively provided with a front end cover (19) and a rear end cover (10), a glue barrel cavity used for accommodating the glue barrel (18) and an air storage cavity used for storing air are arranged in the gun barrel (1), and an air inlet is formed in the air storage cavity;

still include anti-overflow and glue mechanism and control mechanism, anti-overflow glues mechanism includes anti-overflow and glues cylinder (15), the setting of anti-overflow glues the cylinder is pushing away the front end that glues cylinder (9), ejector pad (17) with the piston rod that the cylinder was glued to the anti-overflow is connected, control mechanism controls the flexible action of the piston rod that the cylinder (15) was glued to the anti-overflow through anti-overflow rubber tube (14).

2. The pneumatic glue gun for preventing glue overflow according to claim 1, wherein the control mechanism comprises a control cylinder (31) and a glue overflow prevention valve, the control cylinder (31) is arranged on the fixed handle (2) of the operating handle, a piston rod of the control cylinder is hinged to the movable handle (3) of the operating handle, the glue overflow prevention valve is arranged on the rear end cover (10), a control pipeline (12) of the control cylinder (31) is connected with the glue overflow prevention tube (14) through the glue overflow prevention valve, and under the action of the control cylinder (31), the glue overflow prevention valve is communicated with the gas storage cavity and the glue overflow prevention tube during glue extrusion and releases the pressure of the glue overflow prevention cylinder during a non-glue extrusion state or an inflation state.

3. The pneumatic glue gun of preventing glue overflow of claim 2, characterized in that, the valve is glued to the anti-overflow includes that the valve pocket (25) is glued to the anti-overflow and anti-overflow glues case (7), the top of the valve pocket (25) is glued to the anti-overflow is equipped with pressure release hole (26), the upper portion intercommunication of valve pocket (25) is glued with the anti-overflow to the anti-overflow rubber pipe (14), the gas storage chamber communicates with the middle part of the valve pocket (25) is glued to the anti-overflow, be equipped with upper ring platform and lower ring platform on the valve pocket (7) is glued to the anti-overflow, be equipped with between upper ring platform and the lower ring platform and be used for communicating annular (27) of gas storage chamber and anti-overflow rubber pipe (14), the external diameter of lower ring platform is greater than the external diameter of upper ring platform.

4. The glue overflow preventing pneumatic glue gun according to claim 2 or 3, wherein the brake assembly comprises a pair of brake pads (33), a pair of brake connecting rods respectively acting on the brake pads, and a brake cylinder (35) driving the brake connecting rods (34) to rotate, the upper end of the brake connecting rods (34) is hinged to the rear end cover (10), the lower end of the brake connecting rods is connected with a piston rod of the brake cylinder (35), a fixed cover plate is arranged on the rear side of the rear end cover, a guide channel for translation of the brake pads is arranged between the rear end cover and the fixed cover plate, the control pipeline (12) is communicated with an inner cavity of the brake cylinder (35), and an outer cavity of the brake cylinder is communicated with a gas storage cavity of the gas storage cavity.

5. The glue overflow preventing pneumatic glue gun according to claim 4, wherein a brake base (6) is further arranged on the rear end cover (10), a glue overflow preventing air passage (29) communicated with a glue overflow preventing valve, a brake air passage (30) communicated with an inner cavity of the brake cylinder and an air storage cavity air passage connecting the air storage cavity and an outer cavity of the brake cylinder are arranged on the brake base (6), and the glue overflow preventing air passage (29) or the brake air passage (30) is communicated with the control pipeline (12).

6. The pneumatic glue gun for preventing glue overflow according to claim 5, wherein an air supply path for communicating the air inlet with an air source is arranged on the rear end cover (10) and/or the brake base (6).

7. The glue overflow prevention pneumatic glue gun as claimed in claim 2 or 3, wherein an inflation channel is arranged in the operating handle, an inflation port (16) is arranged at an inlet of the inflation channel, and an outlet of the inflation channel supplies air to the air storage cavity through an inflation pipeline (13).

8. The glue-overflow preventing pneumatic glue gun according to claim 7, characterized in that the control pipeline (12) and the air-charging pipeline (13) are of a double-layer pipe structure.

9. The glue overflow preventing pneumatic glue gun according to claim 2, wherein a brake spring (24) is sleeved on a piston rod of the control cylinder (31), and the brake spring (24) is arranged between the movable handle (3) and the fixed handle (2).

10. The glue gun according to claim 1, 2 or 3, wherein the rear end cap (10) is provided with an air outlet, and the air outlet is provided with a release valve (23).

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