CN115108405A

CN115108405A - Fixed effectual protruding key formula inflatable shaft

Info

Publication number: CN115108405A
Application number: CN202210819794.9A
Authority: CN
Inventors: 李红梅
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-07-13
Filing date: 2022-07-13
Publication date: 2022-09-27

Abstract

The invention relates to the technical field of air expansion shaft equipment, and discloses a convex key type air expansion shaft with a good fixing effect. Through the fixed block, the straight-teeth gear, the fixture block, flexible piece and rubber bellows's setting, can be when this inflatable shaft is inside to be full of highly-compressed air, ensure that the straight-teeth gear can only clockwise rotation and unable counter-clockwise turning, and then make the supporting shoe can only stretch out or static, and can not be compressed and return and contract, can play the secondary supporting role to the convex key, avoid the convex key atress and inwards return and contract, and after work is accomplished, during this inflatable shaft inside pressure release, flexible piece can return and contract under rubber bellows's rebound effect, make the straight-teeth gear at this moment can counter-clockwise turning, guarantee that the supporting shoe can return along with the gasbag is quick, be convenient for dismantle fast.

Description

Fixed effectual protruding key formula inflatable shaft

Technical Field

The invention relates to the technical field of inflatable shaft equipment, in particular to a convex key type inflatable shaft with a good fixing effect.

Background

The air expansion shaft is a specially-made winding and unwinding shaft, namely a protruded shaft can be formed on the surface after high-pressure inflation, the shaft which is quickly retracted on the surface after deflation is called an air expansion shaft, the air expansion shaft is divided into a key type air expansion shaft, a plate type air expansion shaft, a round dot air expansion shaft and the like, wherein the main body of the convex key type air expansion shaft adopts a high-quality steel pipe, the surface is plated with chrome, an aluminum convex key is flexible in expansion and contraction, and the convex key type air expansion shaft expands to form a single key strip, and a fulcrum is diffused to each key strip to balance stress, so that the air expansion shaft is suitable for mechanically winding objects with heavier bearing capacity.

However, the convex key type inflatable shaft in the prior art has the following defects in the actual use process: firstly, when acting on a sleeve, the convex key type air expansion shaft is expanded by an air bag to push out the convex key to play a role in fixing and supporting the sleeve, the air bag is used as an expandable and contractible material, when the convex key extends out and is propped by the sleeve, the contact area of the outer surface of the air bag and the convex key inevitably generates a depression along with the continuous increase of the air pressure in the air expansion shaft, so that the contact area of the air bag and the bottom edge of the convex key generates larger deformation, and the local position of the air bag is in an overstretched state for a long time in the past, thereby easily causing the damage and even the tearing of the air bag; secondly, when the sleeve pipe twines the material, often can provide great pulling force and straighten the material, the material both sides parallel and level that enables to convolute like this, guarantee the quality of convoluteing, but gasbag self has elasticity, be difficult to provide sufficient and stable extrusion force to the protruding key, lead to the sleeve pipe to take place to slide for the inflatable shaft, light then influence sheathed tube rolling material efficiency, heavy then lead to the sleeve pipe to unreel, need rewind, and if the one side of protruding key atress appears retracting, still can cause the deviation of this inflatable shaft body and inter-tube central point to put, concentricity is inhomogeneous promptly, cause this sleeve pipe when the coiling material, the sleeve pipe gyration is not smooth and easy and rotatory great noise scheduling problem that produces.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides the convex key type inflatable shaft with good fixing effect, which has the advantages of good supporting effect, capability of protecting an air bag and realizing quick disassembly, and solves the problems in the prior art.

The invention provides the following technical scheme: a convex key type air expansion shaft with good fixing effect comprises a shell, wherein one end of the shell is fixedly connected with an air valve, one end of the air valve is fixedly connected with a gas connector, a support shaft is fixedly arranged in the middle of an inner cavity of the shell, air bags are fixedly connected with two ends of the support shaft, four groups of convex keys which are arranged in a circumferential mode and fixedly connected with the air bags are movably sleeved on the side face of the shell, an air inlet main is arranged in the middle of one end of the support shaft, a branch pipe arranged in the support shaft is arranged on the side face of one end of the air inlet main, a middle pipe arranged in the support shaft is arranged in the middle of one end of the air inlet main, four groups of mounting cavities which are arranged in a circumferential mode are arranged on the side face of the middle pipe, air inlet through holes are formed between the mounting cavities and the middle pipe, each group of mounting cavity is respectively positioned under each group of convex keys, and limiting grooves are formed in two sides of the mounting cavities, the limiting groove is two sets of keep away from the equal fixedly connected with connecting spring's of one end of intervalve, and is two sets of the slider that the equal fixedly connected with of the other end of connecting spring cup jointed with the limiting groove activity, two sets of one side fixedly connected with connecting rod that the slider is relative, the middle part fixedly connected with fixed block of connecting rod, the installation cavity is close to the equal articulated one end that has first branch in both sides at intervalve one end middle part, and is two sets of the other end of first branch all articulates the connecting block that cup joints with the connecting rod activity, and is two sets of the one end that first branch was kept away from to the connecting block all articulates the one end that has second branch, the other end of second branch articulates the supporting shoe that cup joints with the installation cavity activity.

Preferably, the pivot has been cup jointed in the inside activity of fixed block, the side fixedly connected with straight-teeth gear of pivot one end, one side meshing that the straight-teeth gear is close to the intervalve has the first rack that cup joints with the fixed block activity, one side meshing that keeps away from the intervalve of straight-teeth gear has the second rack that cup joints with the fixed block activity, the one end and one side connecting block fixed connection of first rack, the one end and the opposite side connecting block fixed connection of second rack, the side fixedly connected with collar of the pivot other end, the inside fixed mounting of collar has the supporting spring that four groups of equal circumference were arranged, the outer end fixedly connected with of supporting spring has the fixture block that cup joints with the collar activity, four groups of movable chambers that are in the collar outside are seted up to the inside of fixed block, the one end fixed mounting that the collar was kept away from to movable chamber has rubber bellows, the rubber bellows is towards the flexible piece of one end fixedly connected with of pivot, gas passage has been seted up to the inside of connecting rod, inside the one end of gas passage stretched into the fixed block, four groups the equal fixedly connected with in side of rubber bellows one end is linked together with gas passage's connecting pipe.

Preferably, the convex keys are in one-to-one correspondence with the supporting blocks, one ends of the convex keys, facing the supporting blocks, are concave arcs, and one ends of the supporting blocks, facing the convex keys, are convex arcs matched with the convex keys.

Preferably, one side of the clamping block, which is far away from one end of the mounting ring in the clockwise direction, is provided with an arc surface, and one side of the telescopic block, which is opposite to the clamping block in the clockwise rotation, is provided with a bevel slope surface.

Preferably, the gas channel stretches into the inside one end of fixed block and forms the cross-section for the ring form inside the fixed block, the other end of gas channel runs through the slider to communicate with the installation cavity from the bottom of slider.

The invention has the following beneficial effects:

1. through the setting of installation cavity, supporting shoe, connecting rod, the supporting shoe can play the synchronous supporting role to the gasbag to the protruding key in the inboard of gasbag, not only can prevent that the edge of gasbag and protruding key contact from appearing drawing seriously and producing great deformation, leads to the gasbag to use for a long time and produce and tear, protects the gasbag, can carry out the auxiliary stay to the protruding key simultaneously, avoids protruding key atress to retract, influences the supporting effect of this inflatable shaft.

2. Through the fixed block, the straight-teeth gear, the fixture block, flexible piece and rubber bellows's setting, can be when this inflatable shaft is inside to be full of highly-compressed air, ensure that the straight-teeth gear can only clockwise rotation and unable anticlockwise rotation, and then make the supporting shoe can only stretch out or static, and can not be by the compression retraction, can play the secondary supporting role to the protruding key, avoid protruding key atress and inwards retract, prevent this inflatable shaft body and the deviation of cover inter-tube central point position, cause this sleeve pipe when coiling the material, the sleeve pipe gyration is not smooth and easy and rotatory great noise scheduling problem that produces, and after work is accomplished, during this inflatable shaft inside pressure release, flexible piece can retract under rubber bellows's rebound effect, make straight-teeth gear at this moment can anticlockwise rotation, guarantee that the supporting shoe can retract along with the gasbag is quick, be convenient for quick dismantlement.

Drawings

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

FIG. 2 is a schematic view of the inside of the support shaft of the present invention;

FIG. 3 is an enlarged view of the structure A of the present invention;

FIG. 4 is a schematic cross-sectional view of structure B-B of the present invention;

FIG. 5 is a schematic view of the interior of the structural mounting block of the present invention;

fig. 6 is a schematic view of the interior of the structural mounting ring of the present invention.

In the figure: 1. a housing; 2. an air valve; 3. a gas joint; 4. a support shaft; 5. an air bag; 6. a convex key; 7. an intake manifold; 8. a branch pipe; 9. an intermediate pipe; 10. a mounting cavity; 101. an air inlet through hole; 11. a limiting groove; 12. a connecting spring; 13. a slider; 14. a connecting rod; 15. a first support bar; 16. connecting blocks; 17. a second support bar; 18. a support block; 19. a fixed block; 20. a rotating shaft; 21. a spur gear; 22. a first rack; 23. a second rack; 24. a mounting ring; 25. a support spring; 26. a clamping block; 27. a movable cavity; 28. a rubber bellows; 29. a telescopic block; 30. a gas channel; 31. is connected with an air pipe.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-4, a convex key type inflatable shaft with good fixing effect comprises a housing 1, one end of the housing 1 is fixedly connected with an air valve 2, one end of the air valve 2 is fixedly connected with an air connector 3, the middle part of the inner cavity of the housing 1 is fixedly provided with a support shaft 4, two ends of the support shaft 4 are fixedly connected with air bags 5, four groups of convex keys 6 which are arranged in an equal circumference and fixedly connected with the air bags 5 are movably sleeved on the side surface of the housing 1, the middle part of one end of the support shaft 4 is provided with an air inlet main 7, the side surface of one end of the air inlet main 7 is provided with a branch pipe 8 arranged inside the support shaft 4, the middle part of one end of the air inlet main 7 is provided with a middle pipe 9 arranged inside the support shaft 4, the side surface of the middle pipe 9 is provided with four groups of mounting cavities 10 which are arranged in an equal circumference, an air inlet through hole 101 is arranged between each mounting cavity 10 and the middle pipe 9, each group of the mounting cavities 10 are respectively positioned under each group of the convex keys 6, both sides of the installation cavity 10 are provided with limiting grooves 11, one ends of the two groups of limiting grooves 11 far away from the middle pipe 9 are fixedly connected with one ends of connecting springs 12, the other ends of the two groups of connecting springs 12 are fixedly connected with sliders 13 movably sleeved with the limiting grooves 11, one side of the two groups of sliders 13 opposite to each other is fixedly connected with a connecting rod 14, the middle part of the connecting rod 14 is fixedly connected with a fixed block 19, both sides of the installation cavity 10 near the middle part of one end of the middle pipe 9 are hinged with one ends of first supporting rods 15, the other ends of the two groups of first supporting rods 15 are hinged with connecting blocks 16 movably sleeved with the connecting rods 14, one ends of the two groups of connecting blocks 16 far away from the first supporting rods 15 are hinged with one ends of second supporting rods 17, and the other ends of the second supporting rods 17 are hinged with supporting blocks 18 movably sleeved with the installation cavity 10;

referring to fig. 5 and 6, a rotating shaft 20 is movably sleeved inside a fixed block 19, a straight gear 21 is fixedly connected to a side surface of one end of the rotating shaft 20, a first rack 22 movably sleeved with the fixed block 19 is engaged with one side of the straight gear 21 close to a middle pipe 9, a second rack 23 movably sleeved with the fixed block 19 is engaged with one side of the straight gear 21 away from the middle pipe 9, one end of the first rack 22 is fixedly connected with a connecting block 16 on one side, one end of the second rack 23 is fixedly connected with a connecting block 16 on the other side, a mounting ring 24 is fixedly connected to a side surface of the other end of the rotating shaft 20, four groups of support springs 25 which are arranged in an equal circumference are fixedly installed inside the mounting ring 24, a fixture block 26 movably sleeved with the mounting ring 24 is fixedly connected to an outer end of the support spring 25, four groups of movable cavities 27 which are located outside the mounting ring 24 are opened inside the fixed block 19, a rubber corrugated pipe 28 is fixedly installed at one end of the movable cavity 27 away from the mounting ring 24, the end of the rubber bellows 28 facing the rotating shaft 20 is fixedly connected with a telescopic block 29, the inside of the connecting rod 14 is provided with a gas channel 30, one end of the gas channel 30 extends into the fixed block 19, and the side surfaces of one ends of the four groups of rubber bellows 28 are fixedly connected with connecting gas pipes 31 communicated with the gas channel 30.

As shown in fig. 4, the convex keys 6 correspond to the supporting blocks 18 one by one, one end of the convex key 6 facing the supporting block 18 is in an inward concave arc shape, one end of the supporting block 18 facing the convex key 6 is in a convex arc shape matched with the convex key, because the supporting block 18 plays a synchronous supporting role for the air bag 5 on the convex key 6 in the inner side of the air bag 5, not only can the edge of the air bag 5 contacting the convex key 6 be prevented from being seriously stretched and generating large deformation, the air bag 5 is torn after being used for a long time, the air bag 5 is protected, meanwhile, the convex key 6 can be supported in an auxiliary mode, the situation that the convex key 6 retracts under stress is avoided, and the supporting effect of the inflatable shaft is influenced.

As shown in fig. 5 and 6, an arc surface is disposed on one side of the fixture block 26, which is far away from one end of the mounting ring 24 in the clockwise direction, and an inclined slope surface is disposed on the opposite side of the telescopic block 29, which is opposite to the fixture block 26 when the telescopic block 26 and the fixture block 26 rotate in the clockwise direction, and by the cooperation of the fixture block 26 and the telescopic block 29, when the inflatable shaft is filled with high-pressure air, the spur gear 21 can only rotate in the clockwise direction but cannot rotate in the counterclockwise direction, so that the support block 18 can only extend out or stand still but cannot be compressed and retracted, and the secondary support function can be provided for the convex key 6, thereby preventing the convex key 6 from retracting inwards due to stress, causing the deviation of the central position between the inflatable shaft body and the sleeve, and causing the problems that the sleeve rotates unsmoothly and generates large noise when the sleeve winds materials.

As shown in fig. 3 and 5, one end of the gas channel 30 extending into the fixed block 19 forms a circular ring shape in the fixed block 19, the other end of the gas channel 30 penetrates through the slider 13 and is communicated with the installation cavity 10 from the bottom of the slider 13, the gas channel 30 can conduct the air pressure inside the inflatable shaft into the rubber bellows 28, so that the expansion block 29 can be ensured to be always in an extending state when the inflatable shaft is in operation, the inflatable shaft can be matched with the slope surface of the inclined opening of the expansion block 29 through the arc surface of the fixture block 26 when inflated, when the fixture block 26 rotates clockwise, the fixture block 26 can automatically retract, the rotating shaft 20 and the spur gear 21 can rotate clockwise but not rotate counterclockwise, the support block 18 can synchronously extend out along with the airbag 5 to play a role of auxiliary support, and when the pressure inside the inflatable shaft is relieved after the operation is completed, the expansion block 29 can retract under the rebound effect of the rubber bellows 28, the straight gear 21 can rotate anticlockwise at the moment, so that the supporting block 18 can retract quickly along with the air bag 5, and the rapid disassembly is convenient.

The working principle is that when the inflatable shaft is used for air inlet and inflation, air enters from the air inlet main pipe 7 and respectively enters the branch pipe 8 and the middle pipe 9, the air entering the air bag 5 supports and expands the air bag 5, at the same time, the convex keys 6 are driven to support and fasten outwards, meanwhile, air can enter each installation cavity 10 and the rubber corrugated pipe 28 from the middle pipe 9, under the drive of the air pressure and the air bag 5 in the installation cavity 10, the connecting blocks 16 at two sides can simultaneously drive the first supporting rod 15 and the second supporting rod 17 at two ends to approach the fixing block 19, since the first rack 22 and the second rack are driven to rotate clockwise during the relative movement process, the arc surface of the clockwise rotating fixture block 26 faces the inclined slope surface of the extending telescopic block 29, so that the rotating shaft 20 can rotate, and the supporting block 18 can be ejected outwards to perform auxiliary supporting action on the air bag 5 and the convex key 6;

after the inflatable shaft is fixed, when the convex key 6 is subjected to a large force to cause the local compression and contraction of the air bag 5, the supporting block 18 needs to move inwards, the fixing blocks 19 on two sides are needed to drive the first supporting rod 15 and the second supporting rod 17 to bend towards two sides, namely the first rack 22 and the second rack 23 need to drive the straight gear 21 to rotate anticlockwise, in the anticlockwise rotation process, the vertical surface of the clamping block 26 is abutted against the vertical surface of the telescopic block 29, and the telescopic block 29 cannot be retracted under the internal air pressure of the rubber corrugated pipe 28, so that the telescopic block 29 can clamp the clamping block 26, the straight gear 21 cannot rotate anticlockwise, the supporting block 18 cannot move inwards, the secondary supporting effect on the convex key 6 is achieved, the stable support of the inflatable shaft is ensured, and the problem that the supporting effect of the inflatable shaft is deteriorated due to the compression of the convex key 6 can be avoided;

when carrying out this inflatable shaft and dismantling, release inflatable shaft inside gas through the air valve, because atmospheric pressure diminishes, can make rubber bellows 28 drive flexible piece 29 under self resilience effect and retract to activity chamber 27 in for pivot 20 at this moment can anticlockwise rotation, so when gasbag 5 retracts, can drive convex key 6 and supporting shoe 18 synchronous recovery normal position, be convenient for go it down fast, improve work efficiency.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a fixed effectual protruding key formula inflatable shaft, includes casing (1), the one end fixedly connected with air valve (2) of casing (1), the one end fixedly connected with gas connection (3) of air valve (2), its characterized in that: the middle part of the inner cavity of the shell (1) is fixedly provided with a support shaft (4), two ends of the support shaft (4) are fixedly connected with airbags (5), four groups of convex keys (6) which are arranged in a uniform circumference way and are fixedly connected with the airbags (5) are movably sleeved on the side surface of the shell (1), an air inlet main pipe (7) is arranged in the middle of one end of the support shaft (4), branch pipes (8) which are arranged in the support shaft (4) are arranged on the side surface of one end of the air inlet main pipe (7), a middle pipe (9) which is arranged in the support shaft (4) is arranged in the middle of one end of the air inlet main pipe (7), four groups of mounting cavities (10) which are arranged in a uniform circumference way are arranged on the side surface of the middle pipe (9), air inlet through holes (101) are arranged between the mounting cavities (10) and the middle pipe (9), and each group of mounting cavities (10) is respectively positioned under each group of convex keys (6), both sides of the installation cavity (10) are respectively provided with a limiting groove (11), two groups of limiting grooves (11) are respectively fixedly connected with one end of a connecting spring (12) at one end far away from the middle pipe (9), two groups of connecting springs (12) are respectively fixedly connected with a sliding block (13) movably sleeved with the limiting grooves (11) at the other end, two groups of connecting rods (14) are respectively fixedly connected with one side of each sliding block (13) opposite to the other side, a fixed block (19) is fixedly connected with the middle part of each connecting rod (14), both sides of the installation cavity (10) close to the middle part of one end of the middle pipe (9) are respectively hinged with one end of a first supporting rod (15), the other ends of the first supporting rods (15) are respectively hinged with a connecting block (16) movably sleeved with the connecting rods (14), and one end of each connecting block (16) far away from the first supporting rod (15) is respectively hinged with one end of a second supporting rod (17), the other end of the second supporting rod (17) is hinged with a supporting block (18) movably sleeved with the mounting cavity (10).

2. The convex key type inflatable shaft with good fixing effect as claimed in claim 1, wherein: the inside activity of fixed block (19) has cup jointed pivot (20), side fixedly connected with straight-teeth gear (21) of pivot (20) one end, one side meshing that straight-teeth gear (21) is close to well casing (9) has first rack (22) that cup joints with fixed block (19) activity, one side meshing of keeping away from well casing (9) of straight-teeth gear (21) has second rack (23) that cup joints with fixed block (19) activity, the one end and one side connecting block (16) fixed connection of first rack (22), the one end and the opposite side connecting block (16) fixed connection of second rack (23), the side fixedly connected with collar (24) of the pivot (20) other end, the inside fixed mounting of collar (24) has supporting spring (25) that four groups of equal circumference were arranged, the outer end fixedly connected with of supporting spring (25) has fixture block (26) that cup jointed with collar (24) activity, the utility model discloses a pneumatic connecting device, including fixed block (19), four sets of movable chamber (27) that are in the collar (24) outside are seted up to the inside of fixed block (19), the one end fixed mounting that collar (24) were kept away from in movable chamber (27) has rubber bellows (28), rubber bellows (28) are towards one end fixedly connected with expansion block (29) of pivot (20), gas passage (30) have been seted up to the inside of connecting rod (14), inside fixed block (19) were stretched into to the one end of gas passage (30), four sets of connecting trachea (31) that the equal fixedly connected with in side of rubber bellows (28) one end is linked together with gas passage (30).

3. The convex key type inflatable shaft with good fixing effect as claimed in claim 1, wherein: the convex keys (6) are in one-to-one correspondence with the supporting blocks (18), one ends of the convex keys (6) facing the supporting blocks (18) are in concave arc shapes, and one ends of the supporting blocks (18) facing the convex keys (6) are in convex arc shapes matched with the convex keys.

4. The convex key type inflatable shaft with good fixing effect as claimed in claim 2, wherein: one side of the clamping block (26) far away from one end of the mounting ring (24) in the clockwise direction is provided with an arc surface, and one side of the telescopic block (29) opposite to the clamping block (26) in the clockwise rotation is provided with an inclined opening slope surface.

5. The convex key type inflatable shaft with good fixing effect as claimed in claim 2, wherein: the cross section of one end of the gas channel (30) extending into the fixing block (19) is circular in the fixing block (19), and the other end of the gas channel (30) penetrates through the sliding block (13) and is communicated with the installation cavity (10) from the bottom of the sliding block (13).