CN111891852A

CN111891852A - Convex key type air expansion shaft with good anti-skid performance

Info

Publication number: CN111891852A
Application number: CN202010780885.7A
Authority: CN
Inventors: 冯春伦
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-08-06
Filing date: 2020-08-06
Publication date: 2020-11-06

Abstract

The invention relates to the technical field of air expansion shaft equipment and discloses a convex key type air expansion shaft with good anti-skid performance. Through strutting arrangement's setting, it expands the gasbag to get into the inside gas of gasbag, it outwards supports the fastening action to drive convex key and backup pad simultaneously, and inside gas is ejecting with the stopper when with rectangular pole jack-up, when this inflatable shaft reachs the support point location, the dull and stereotyped card of support is in the skewed tooth top, the stopper can play the dead effect of support card to the support flat board, prevent to support dull and stereotyped deflection, can play the secondary support effect to the convex key, prevent that the gasbag from appearing sunkenly, avoid causing the deviation that this inflatable shaft body and cover intervallic central point put, cause this sleeve pipe when coiling the material, the sleeve pipe gyration is not smooth and easy and the eccentric rotation produces great noise scheduling problem, solve the problem that the sleeve skidded simultaneously.

Description

Convex key type air expansion shaft with good anti-skid performance

Technical Field

The invention relates to the technical field of inflatable shaft equipment, in particular to a convex key type inflatable shaft with good anti-skid performance.

Background

The air expansion shaft is a specially-made winding and unwinding shaft, namely, the surface of the air expansion shaft can be protruded after high-pressure inflation, the shaft which is quickly retracted after the air expansion is called an air expansion shaft, and 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 a convex key type air expansion shaft main body adopts a high-quality steel pipe, surface chromium plating is performed, an aluminum convex key is flexible and flexible, a high-quality rubber inner container and a quick air inflation and exhaust nozzle are configured, the sealing effect is good, the service life is long, the shaft head can be disassembled, the maintenance is convenient, and as the convex key type air expansion shaft expands and rises, a fulcrum is diffused to each key bar, the stress is balanced, and the mechanical winding and bearing capacity is heavier, for: cloth, paper, film, printed matter, leather, composite material, etc. and can raise work efficiency effectively.

However, the conventional convex key type inflatable shaft has the following problems in the practical use process: firstly, when acting on a sleeve, because the convex key type air expansion shaft is expanded by the air bag to push the convex key out to play a fixed supporting role for the sleeve, and the air bag is used as an expandable and contractible material, when the convex key is subjected to the downward pressure of the sleeve, the part of the air bag above the convex key, which is contacted with the convex key, is inevitably sunken, so that the central position deviation between the air expansion shaft body and the sleeve, namely the concentricity is not uniform, and the problems that the sleeve rotates unsmoothly and generates larger noise when the sleeve winds materials are caused; secondly, when the sleeve pipe twines the material, often can provide great pulling force and straighten the material, enable the material both sides parallel and level of coiling like this, guarantee the quality of convoluteing, nevertheless gasbag self has elasticity, is difficult to provide sufficient and stable extrusion force to the protruding key, leads to the sleeve pipe to take place to slide for the inflatable shaft, and the material efficiency of sheathed tube rolling is then influenced to light, and the heavy sleeve pipe that leads to unreels needs the rolling again.

Disclosure of Invention

Aiming at the defects of the background technology, the invention provides the convex key type air expansion shaft with good anti-skid performance, which has the advantages of good working effect and difficult skid of the air expansion shaft, and solves the problems in the background technology.

The invention provides the following technical scheme: a raised key type air expansion shaft with good anti-skid performance comprises a shell, wherein one end of the shell is fixedly connected with an air valve, one side of the air valve is fixedly connected with a ventilation joint, the middle part of the inner cavity of the shell is fixedly provided with a middle shaft, two ends of the middle shaft are fixedly connected with air bags, the side surface of the shell is movably sleeved with a raised key with the bottom contacting with the air bags, a cross-shaped channel is arranged inside one end of the middle shaft, an air channel with a rectangular cross section is arranged inside the middle shaft, the side surfaces of the air channel are both provided with an installation cavity positioned under the raised key, the side surface of the upper part of the installation cavity is fixedly connected with inclined teeth, a rectangular rod is movably sleeved with the installation cavity, one end of the rectangular rod close to the air bags is fixedly connected with a supporting plate, one end of the rectangular rod close to the air, the bottom of the rectangular rod is provided with a cavity communicated with the corrugated pipe, and two sides of the rectangular rod are fixedly connected with supporting devices.

Preferably, the supporting device comprises an installation block, limiting blocks are movably sleeved inside the installation block, two sides of the limiting blocks are fixedly connected with a plurality of groups of springs which are arranged at equal intervals, and a supporting flat plate hinged with the installation block is arranged below the limiting blocks.

Preferably, the support plate is fixedly connected with the airbag.

Preferably, the outer end of the supporting flat plate is movably sleeved with a roller, and a torsional spring is arranged at the hinged position of the supporting flat plate and the mounting block.

Preferably, the end part of the inner side of the limiting block is provided with a limiting bulge, and the limiting block can not contact with the helical teeth when extending out completely.

The invention has the following beneficial effects:

1. through the arrangement of the supporting device, when the air expansion shaft is used for air inlet and inflation, the air bag support is expanded by the air entering the air bag, the convex key and the supporting plate are simultaneously driven to outwards support and fasten, the air inside enters the cavity through the corrugated pipe to jack the rectangular rod, and the limiting block is simultaneously ejected out, at the moment, the supporting plate can advance along the helical teeth while the rectangular rod expands along with the air bag, when the air expansion shaft reaches the supporting point position, the supporting plate is clamped above the helical teeth, when the convex key is subjected to larger force to cause the contraction of the air bag, the limiting block can play a role of supporting and clamping the supporting plate to prevent the supporting plate from deflecting, can play a secondary supporting role on the convex key to prevent the air bag from generating depression, avoids causing the deviation of the central position between the air expansion shaft body and the sleeve, and causes the problems that the sleeve rotates unsmoothly and generates larger noise due to eccentric rotation when the sleeve winds materials, and the problem of slipping of the sleeve is solved.

2. The gyro wheel has been cup jointed through the outer end activity of supporting the flat board, and supports the flat board and be provided with the torsional spring with the articulated department of installation piece, sets up the gyro wheel and can change sliding friction into rolling friction in the one end that supports the flat board and be close to the skewed tooth, reduces the friction between support flat board and the skewed tooth, and the torsional spring guarantees to support the flat board and be in all the time with the relative horizontality of skewed tooth, ensures to support flat board normal work.

Drawings

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

FIG. 2 is a front view of the present invention;

FIG. 3 is a schematic cross-sectional view of a structure A-A of the present invention;

FIG. 4 is an enlarged view of the structure A of the present invention;

FIG. 5 is a schematic cross-sectional view of structure B-B of the present invention;

fig. 6 is an enlarged view of the structure B of the present invention.

In the figure: 1. a housing; 2. an air valve; 3. a vent fitting; 4. an intermediate shaft; 5. an air bag; 6. a convex key; 7. a cross channel; 8. a gas channel; 9. a mounting cavity; 10. helical teeth; 11. a rectangular bar; 12. a support plate; 13. a bellows; 14. a cavity; 15. a support device; 151. mounting blocks; 152. a limiting block; 153. a spring; 154. and supporting the flat plate.

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. 1-6, a raised key type air expansion shaft with good anti-slip performance comprises a housing 1, one end of the housing 1 is fixedly connected with an air valve 2, one side of the air valve 2 is fixedly connected with a ventilation joint 3, the middle part of the inner cavity of the housing 1 is fixedly provided with an intermediate shaft 4, two ends of the intermediate shaft 4 are fixedly connected with an air bag 5, the side surface of the housing 1 is movably sleeved with a raised key 6 with the bottom contacting with the air bag 5, the inside of one end of the intermediate shaft 4 is provided with a cross-shaped channel 7, the inside of the intermediate shaft 4 is provided with an air channel 8 with a rectangular cross section, the side surfaces of the air channel 8 are both provided with an installation cavity 9 positioned under the raised key 6, the side surface of the upper part of the installation cavity 9 is fixedly connected with inclined teeth 10, the installation cavity 9 is movably sleeved with a rectangular rod 11, one end of the rectangular, the other end and the installation cavity 9 fixed connection of bellows 13, the cavity 14 with bellows 13 intercommunication is seted up to the bottom of rectangular rod 11, and the equal fixedly connected with strutting arrangement 15 in both sides of rectangular rod 11.

Wherein, the supporting device 15 includes an installation block 151, a limit block 152 is movably sleeved inside the installation block 151, a plurality of sets of springs 153 arranged at equal intervals are fixedly connected between the limit blocks 152 at two sides, a supporting plate 154 hinged with the installation block 151 is arranged below the limit block 152, when the inflatable shaft is inflated, gas enters the inside of the airbag 5 and the gas channel 8 from the cross channel 7 respectively, the gas entering the inside of the airbag 5 expands the airbag 5, and drives the convex key 6 and the supporting plate 12 to support and fasten outwards, while the gas inside enters the cavity 14 through the corrugated pipe 13 to jack up the rectangular rod 11 and push out the limit block 152, at this time, the supporting plate 154 can advance along the helical tooth 10 while the rectangular rod 11 expands along with the airbag 5, when the inflatable shaft reaches the supporting point, the supporting plate 154 is clamped above the helical tooth 10, when the convex key 6 receives a large force to cause the airbag 5 to contract, the limiting block 152 can play a role in supporting and clamping the support flat plate 154, prevent the support flat plate 154 from deflecting, and play a role in secondary support for the convex key 6.

Wherein, backup pad 12 and gasbag 5 are fixed connection, and backup pad 12 can play the secondary support effect to gasbag 5, prevents that gasbag 5 from appearing sunken, avoids causing the deviation that this inflatable shaft body and cover intervehicular central point put, causes this sleeve pipe when coiling the material, and the sleeve pipe gyration is not smooth and easy and rotatory great noise scheduling problem that produces.

Wherein, the gyro wheel has been cup jointed in the outer end activity of support flat plate 154, and support flat plate 154 and the articulated department of installation piece 151 are provided with the torsional spring, can change sliding friction into rolling friction through set up the gyro wheel in the one end that support flat plate 154 is close to skewed tooth 10, reduce the friction between support flat plate 154 and the skewed tooth 10, and the torsional spring guarantees that support flat plate 154 is in the relative horizontality with skewed tooth 10 all the time.

Wherein, the tip of stopper 152 inboard sets up spacing arch, and stopper 152 can not contact skewed tooth 10 when all stretching out, and stopper 152 opens under receiving gas pressure, plays limiting displacement to supporting flat board 154, avoids supporting flat board 154 reverse deflection, prevents that the physiosis axle under the inflation state protruding key 6 from producing under the exogenic action sunken, provides sufficient extrusion force for protruding key 6, prevents that the sleeve pipe from taking place to slide for the physiosis axle.

The operating principle, when this inflatable shaft admit air and inflate the work, gas gets into gasbag 5 inside and gas channel 8 respectively from cross passageway 7, the gas that gets into gasbag 5 inside supports the inflation with gasbag 5, drive protruding key 6 and backup pad 12 simultaneously and outwards support the fastening effect, and inside gas gets into cavity 14 through bellows 13, with rectangular rod 11 jack-up, push out stopper 152 simultaneously, support flat plate 154 can advance along skewed tooth 10 when rectangular rod 11 expands along with gasbag 5 this moment, when this inflatable shaft reachs the support point position, support flat plate 154 card is in skewed tooth 10 top, when protruding key 6 received great power and leads to gasbag 5 shrink, stopper 152 can play the dead effect of support card to support flat plate 154, prevent that support flat plate 154 from deflecting, can play the secondary support effect to protruding key 6.

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 protruding key formula inflatable shaft that skid resistance is good, includes casing (1), the one end fixedly connected with air valve (2) of casing (1), one side fixedly connected with of air valve (2) connects (3) of ventilating, its characterized in that: the middle part of the inner cavity of the shell (1) is fixedly provided with an intermediate shaft (4), two ends of the intermediate shaft (4) are fixedly connected with an air bag (5), a convex key (6) with the bottom contacting with the air bag (5) is movably sleeved on the side surface of the shell (1), a cross channel (7) is arranged inside one end of the intermediate shaft (4), a gas channel (8) with a rectangular cross section is arranged inside the intermediate shaft (4), installation cavities (9) positioned under the convex key (6) are arranged on the side surface of the gas channel (8), oblique teeth (10) are fixedly connected on the side surface of the upper part of the installation cavity (9), a rectangular rod (11) is movably sleeved on the installation cavity (9), one end of the rectangular rod (11) close to the air bag (5) is fixedly connected with a support plate (12), and one end of the rectangular rod (11) close to the gas channel (8) is fixedly connected with a, the other end and the installation cavity (9) fixed connection of bellows (13), cavity (14) with bellows (13) intercommunication are seted up to the bottom of rectangle pole (11), the equal fixedly connected with strutting arrangement (15) in both sides of rectangle pole (11).

2. The convex key type inflatable shaft with good skid resistance as claimed in claim 1, wherein: strutting arrangement (15) are including installation piece (151), stopper (152), both sides have been cup jointed in installation piece (151) inside activity a plurality of groups of spring (153) of equidistance range of fixedly connected with between stopper (152), the below of stopper (152) is provided with and installs piece (151) articulated support flat board (154).

3. The convex key type inflatable shaft with good skid resistance as claimed in claim 1, wherein: the supporting plate (12) is fixedly connected with the air bag (5).

4. The convex key type inflatable shaft with good anti-skid performance as claimed in claim 2, wherein: the outer end of the supporting flat plate (154) is movably sleeved with a roller, and a torsional spring is arranged at the hinged position of the supporting flat plate (154) and the mounting block (151).

5. The convex key type inflatable shaft with good anti-skid performance as claimed in claim 2, wherein: the end part of the inner side of the limiting block (152) is provided with a limiting protrusion, and the limiting block (152) can not contact with the helical teeth (10) when being completely extended.