CN201201826Y

CN201201826Y - Pneumatic core shaft

Info

Publication number: CN201201826Y
Application number: CNU2008201047414U
Authority: CN
Inventors: 陈锡彩
Original assignee: YUI-LIN-LI Co Ltd
Current assignee: YUI-LIN-LI Co Ltd
Priority date: 2008-04-16
Filing date: 2008-04-16
Publication date: 2009-03-04
Anticipated expiration: 2018-04-16

Abstract

A gas expansion shaft is used for clamping and releasing a charge pope, which mainly comprises an axis connecting unit and an expanding unit, wherein the axis connecting unit is provided with a pivot body having a plurality of air chambers arranged on an outer surface and extended along an axis, the expanding unit is provided with a plurality of first ejectors and second ejectors, the first and the second ejectors alternatively penetrate through the air chambers of the shaft body and are forced by the air pressure of the air chambers to expand outwards from the axis, to be positioned at a first position and a second position with a height drop. The first and the second ejectors force the charge pope to hold concentricity and roundness to clamp and force the charge pope.

Description

Gas expansion shaft

[technical field]

The utility model relates to a kind of gas expansion shaft, particularly relates to a kind of gas expansion shaft that can expand outwardly and inwardly shrink.

[background technology]

Ginseng Fig. 1, Fig. 2, inflatable axle 1 with TaiWan, China patent announcement M293366 case is an example, mainly is to be installed on facility (figure does not show), and is used to be nested with a material pipe 2, include a fulcrum body 11, several air bags 12, several clip bars 13, and several shell fragments 14.This body 11 has several grooves 111 that extend along its length.Aforementioned air bag 12 is to be contained in respectively in the groove 111 of this body 11 with aforementioned clip bar 13.Aforementioned shell fragment 14 is two two and is one group and is set in this clip bar 13 both sides, and can be trapped in the groove 111 of this body 11 by the aforementioned clip bar 13 of ejection.

Whereby, when expanding when aforementioned air bag 12 injection air pressure, being arranged on clip bar 13 on the aforementioned air bag 12 will expand outwardly and protrude out this body 11, make aforementioned clip bar 13 folders compel these material pipe 2 one inside faces 21, rotate and can drive this material pipe 2 synchronously, reach and furl as paper wood, rubber material, plastic cement material, metal material, cloth material, wire rod ... purpose Deng material.

Because this material pipe 2 is before the unaerated still of aforementioned air bag 12, be influenced by gravity and terrestrial attraction, be hung on the eccentric position of this body 11, therefore, when the 12 moments inflation of aforementioned air bag and the aforementioned clip bar 13 of ejection when outwards compeling this material pipe 2 of folder, tend to because the deviation of this body 11 and these 2 centers of material pipe, the concentricity heterogeneity is arranged, and make these material pipe 2 distortion cause out of roundness to be not so good as situations such as expection, cause this material pipe 2 when the coiling material, disappearance such as have revolution to have some setbacks and noise is bigger.

[utility model content]

The purpose of this utility model is to provide a kind of gas expansion shaft that is used to promote concentricity and out of roundness.

In order to achieve the above object, the utility model provides a kind of gas expansion shaft, and this gas expansion shaft is to be used for compeling to press from both sides, unclasp a material pipe, comprises a shaft connection unit and an expansion elements.This shaft connection unit has a fulcrum body.This body has several air chambers that are formed on an outside face and extend along a parallel axis direction.This expansion elements has several first holding pieces and several second holding pieces.Aforementioned first, second holding piece is to be set in respectively in the air chamber of this body in staggered mode, and is subjected to the effect of this air chamber internal gas pressure, is that the center expands outwardly with this axis respectively, and is positioned at a primary importance and the second place with height fall.

Effect of the present utility model is can compel to support this material pipe with aforementioned first, second holding piece with height fall keep concentricity and out of roundness, and then the smoothness when promoting scrolling.

[description of drawings]

Fig. 1 is a block diagram, and TaiWan, China patent announcement M293366 case is described.

Fig. 2 is a cutaway view of aforementioned TaiWan, China patent announcement M293366 case.

Fig. 3 is a three-dimensional exploded view, and one first preferred embodiment of the utility model one gas expansion shaft is described.

Fig. 4 is a combination stereogram of this first preferred embodiment.

Fig. 5 is the cutaway view along Fig. 4 straight line V-V direction.

Fig. 6 is the cutaway view along Fig. 4 straight line VI-VI direction.

Fig. 7 is the cutaway view that folder one material pipe is compeled in this first preferred embodiment.

Fig. 8 is a cutaway view, and one second preferred embodiment of the utility model one gas expansion shaft is described.

Fig. 9 is a cutaway view, and one the 3rd preferred embodiment of the utility model one gas expansion shaft is described.

Figure 10 is a cutaway view, illustrates that the 3rd preferred embodiment is set in an axostylus axostyle.

[specific embodiment]

Below by preferred embodiment and accompanying drawing gas expansion shaft of the present utility model is elaborated.

Consult Fig. 3, Fig. 4, one first preferred embodiment of the utility model gas expansion shaft comprises: shaft connection unit 3, a gas rise unit 4 and an expansion elements 5.

Consult Fig. 3, Fig. 5, and Fig. 6, this shaft connection unit 3 has a fulcrum body 31, two 32 and two air valves 33 of axle envelope.This body 31 have around an axis X and define an axis hole 310 an axial wall 311, be formed on these axial wall 311 1 outside faces and define the several of an air chamber 312 respectively along parallel this axis X direction spacing rib 313, and run through this axial wall 311 and be formed on several pores 314 of aforementioned air chamber 312 2 ends relatively along vertical this axis X direction.Aforementioned axis envelope 32 is a solid body of rod in this preferred embodiment, is to screw togather with these body 31 2 ends, and has a runner 321 that is used to guide air pressure respectively, and be formed on an outside face and be communicated with an annular groove 322 of these body 31 pores 314 and this runner 321.Aforementioned air valve 33 is relative this runner 321 ports and organize and be located at this envelope 32 respectively, is used to control air pressure into and out of this runner 321.

This gas unit 4 that rises has several air bags 41, several pressing blocks 42 that are set in respectively in this body 31 air chambers 312, and several bolts 43.Aforementioned air bag 41 has a gas port 411 that is formed on two ends and docks with these body 31 pores 314 respectively.Aforementioned pressing block 42 is that relative respectively this gas port 411 compels to be against on this air bag 41.Aforementioned bolt 43 is to screw togather with this body 31, and urgent these pressing block 42 firm these air bags 41 of difference, and compels pore 314 airtight contacts the to gas port 411 with this body 31 of this air bag 41.

This expansion elements 5 has several first holding pieces 51 and several second holding pieces 52, and several to elastic element 53.Aforementioned first, second holding piece the 51, the 52nd is set in respectively in the air chamber 312 of this body 31 in staggered mode, and extend and be stacked on this air bag 41 along parallel this axis direction respectively, and have respectively be emerging in this air chamber 312 outer one compel to support portion 511,521, and be used for and this fin 512,522 spacing rib 313 mutual blocks.Each is 512,522 of fins that are set in the spacing rib 313 of this body 31 and aforementioned first,

second holding piece

51,52 to elastic element 53, and making this first,

second holding piece

51,52 be subjected to the elastic acting force of aforementioned elastic element 53 is that inwardly shrink at the center with this axis X.

What deserves to be mentioned is, aforementioned first holding piece 51 is metallic material in this preferred embodiment, aforementioned second holding piece 52 is plastic material in this preferred embodiment, and more aforementioned first holding piece of height 51 height along vertical this axis X direction, therefore, when aforementioned first,

second holding piece

51,52 equidistantly expanded outwardly, the expanded height of aforementioned second holding piece 52 was greater than aforementioned first holding piece 51.

Enter the gas port 411 of this air bag 41 through the pore 314 of this annular groove 322, this body 31 by the runner 321 of aforementioned axis envelope 32 when air pressure, aforementioned air bag 41 can expand because being full of air pressure, and aforementioned first,

second holding piece

51,52 of ejection thinks that axis is that the center expands outwardly, and helps sheet 512,522 to be hampered by the spacing rib 313 of this body 31 and is positioned at outstanding this body 31 respectively and is formed with a primary importance and a second place of height fall with aforementioned respectively to aforementioned first,

second holding piece

51,52.

Because the expanded height of aforementioned first holding piece 51 is less than aforementioned second holding piece 52, therefore, under the situation that arrives primary importance in advance, can see through this compels to support earlier at this material pipe 2 inside faces 21 with the less power of supporting of compeling to portion 511, make this material pipe 2 obtain the location, and form homogeneous with the concentricity of this body 31, and aforementioned second holding piece 52 of the second place of arriving soon after just can be under the situation of these material pipe 2 non-migrations, compel the portion that supports 521 with this and compel to support these material pipe 2 inside faces 21, reach and compel these material pipe 2 formation interlocks of folder, and then promote the out of roundness of this material pipe 2, and it is not yielding, whereby, making this material pipe 2 and this body 31 can both be the center rotation with this axis X, reaches the purpose that furls material.

Consult Fig. 5, Fig. 7, when this air valve 33 is touched and is discharged air pressure, aforementioned air bag 41 can recover flat form, and making aforementioned first,

second holding piece

51,52 be subjected to the elastic acting force of aforementioned elastic element 53 is that inwardly shrink at the center with this axis X, reaches the purpose that discharges this material pipe 2.

Consulting Fig. 8, is the utility model one second preferred embodiment, and itself and this first preferred embodiment is roughly the same, difference be in:

This shaft connection unit 3 also has with composite material makes and is set in a axle center 34 in this body 31 axis holes 310.Whereby, this axle center 34 can promote the structural strength of this body 31, and promotes the service life of this body 31.

Consulting Fig. 9, Figure 10, is the utility model 1 the 3rd preferred embodiment, and itself and this first preferred embodiment is roughly the same, difference be in:

The axle envelope 35 of this shaft connection unit 3 is a ring body around this axis X in this preferred embodiment, has a runner 351 that is used to guide air pressure equally, and is formed on an outside face and is communicated with an annular groove 352 of these body 31 pores 314 and this runner 351.

Whereby, the facility of these body 31 applicable different types (figure does not show), and be set on the axostylus axostyle 6 of these facility, and air pressure can seal 35 runner 351 enters this air bag 41 through the pore 314 of this annular groove 352, this body 31 gas port 411 by aforementioned axis equally, aforementioned air bag 41 is expanded and aforementioned first,

second holding piece

51,52 urgent these material pipes 2 of folder of ejection, reach the purpose that furls material.

According to the above as can be known, gas expansion shaft of the present utility model has following advantage and effect:

The utility model can be by aforementioned first,

second holding piece

51,52 with height fall, revise the differential location of this material pipe 2 earlier, make this material pipe 2 and the concentricity of this body 31 form homogeneous, compel this material pipe 2 of folder again and furl material, whereby, not only can promote the out of roundness of this material pipe 2, make material pipe 2 not yielding, and the smoothness in the time of promoting this material pipe 2 with these body 31 rotations, the noise when reducing rotation makes the utility model have more practicality.

Claims

1. gas expansion shaft is characterized in that: comprise:

One shaft connection unit has a body, and this body has several air chambers that are formed on an outside face and extend along a parallel axis direction; And

One expansion elements, have several first holding pieces and several second holding pieces, aforementioned first, second holding piece is to be set in respectively in the air chamber of this body in staggered mode, and be subjected to the effect of this air chamber internal gas pressure, be that the center expands outwardly with this axis respectively, and be positioned at a primary importance and a second place with height fall.

2. gas expansion shaft as claimed in claim 1, it is characterized in that: this body also has and is formed on this outside face and defines the several to spacing rib of this air chamber along parallel this axis direction, aforementioned first, second holding piece have respectively be emerging in this air chamber outer one compel the portion that supports, and be used for compeling to be positioned at a fin of this first, second position to portion with making this to the mutual block of spacing rib.

3. gas expansion shaft as claimed in claim 1, it is characterized in that: this expansion elements also has several to elastic element, each is to be set between the fin of the spacing rib of this body and aforementioned first, second holding piece to elastic element, make this first, second holding piece after air pressure is got rid of, being subjected to the elastic acting force of aforementioned elastic element is that inwardly shrink at the center with this axis.

4. gas expansion shaft as claimed in claim 1, it is characterized in that: this gas expansion shaft also includes the gas unit that rises, this gas unit that rises has several air bags that are set in respectively in this body air chamber, aforementioned air bag is used to inflate swollen rising and the contraction of losing heart, and then aforementioned first, second holding piece of ejection is that the center expands outwardly and inwardly folds with this axis.

5. gas expansion shaft as claimed in claim 4 is characterized in that: this body also has several pores, aforementioned air bag have respectively dock with this air bag gas port and be used to guide air pressure into and out of at least one gas port.

6. gas expansion shaft as claimed in claim 5, it is characterized in that: this gas unit that rises also has several pressing blocks, and several bolts, aforementioned pressing block is that relative respectively this pore compels to be against on this air bag, aforementioned bolt is to screw togather with this body, and firm this air bag of urgent this pressing block reaches the gas port of compeling to this air bag and contacts with the pore of this body is airtight respectively.

7. gas expansion shaft as claimed in claim 5, it is characterized in that: this shaft connection unit also has two axle envelopes, aforementioned axis envelope be locking at these body two ends, and have a runner of guiding air pressure respectively, and be formed on an outside face and be communicated with an annular groove of this body pore and this runner.

8. gas expansion shaft as claimed in claim 1 is characterized in that: aforementioned first holding piece is a metallic material, and aforementioned second holding piece is a plastic material, and aforementioned first holding piece is second holding piece that is lower than this second place when being positioned at this primary importance.

9. gas expansion shaft as claimed in claim 1 is characterized in that: this body has around an axis and defines an axial wall of an axis hole, and this axial wall is to be formed with aforementioned air chamber.

10. gas expansion shaft as claimed in claim 1 is characterized in that: this shaft connection unit also has an axle center that is set in this body axis hole.