CN1106512C - Gas cylinder - Google Patents

Abstract

The present invention relates to an inflator which is provided with an external steel pipe (8), wherein the lower end (6) of the steel pipe has a small diameter; a plastic lining (10) provided with a radial ribbed plate in the longitudinal direction is inserted into the upper end of the steel pipe under pressure; the lining is provided with two annular reinforcing parts (2, 3) separated from each other at a certain interval; the ribbed plate retracts backwards in the separation part so as to form two cavities (1, 1') alternatively arranged on the entire periphery of the external shape, and hook-shaped ribs (9) are installed in the cavities (1, 1'); the hook-shaped ribs (9) are made of a material formed by the semi-stamping on the wall of the steel pipe; an overturn pan (7) is arranged on the lower end (6) of the steel pipe (8), and the edge of the overturn pan (7) is supported on a flange (18) on the lower end (6) of the steel pipe (8).

Description

Inflator

Invention field

The present invention relates to inflator used in several purposes, for example that used class inflator in the control of the parts of furniture, chair-like equipment and in regulating.

Background technique

In this technical scope, known inflator is made up of steel pipe basically, and plastic bushing inserts the steel pipe upper end and is fit to be placed in the inside of described steel pipe.Equally, in these inflators, the basal plane that has than minor diameter is made in the lower end, laying a flat central portion on this basal plane, is to use packing ring traditionally, is welded to the inside of steel pipe, make the lower end of bar pass this central portion, lay the location that a retaining washer is used for described bar simultaneously.

Depress the end that is installed in steel pipe at the plastic bushing of upper end adding, the floor along radius of the reinforcement of a series of vertical arrangements has been equipped in the lining side.Fix for the final of lining, on outer tube, hole like that,, lining is maintained fixed so that can insert metal pin.

Recently, this lining has been equipped with the circumferential reinforcer near its upper end, is therefore vertically forming a series of spaces that distribute regularly between the floor.As the part of steel pipe, in steel pipe, make some fins that stretch into inwards, these fins are made by the material that the same semi-stamping of steel pipe self is shaped, and these fins are packed in the foregoing space.For the described fin of desiring to be installed in the corresponding space, must make the position of semi-stamping shaping and the position consistency in described space, thereby be convenient to assemble, cutting one group of viewing window in the outside front of plastic bushing is communicated with this space or cavity, so that can see fin by these viewing windows, and the position consistency with cavity can be made in the position of viewing window, and available pressure inserts lining in the steel pipe then.

The pin technological scheme of at first mentioning obvious cost aspect manufacturing and assembling is very high.In second kind and later proposition way, make moderate progress.But it also has shortcoming.

The shortcoming of this second kind of technological scheme is this fact, promptly must find definite position consistent between viewing window and the cavity, has so just taken too much built-up time.In addition, the intensity that viewing window has reduced the lining upper part is set, especially when the user sat down on chair, this was the moment that this part is born maximum stress.

On the other hand, and when packing ring on relating to the bar lower end or clip, usually this thing happens, promptly when bar usually when stretch out described lower end, it contacts with the floor.If the floor is wooden, then it becomes by the end of bar and clip and contacts scratch, and if have carpet or Split carpet, then frequent friction and carpet to be subjected to friction to make the carpet wearing and tearing the most at last, damage then.

Recently, for fear of these shortcomings, invented a kind of technological scheme, it is by the raise end of bar and clip of circular metal packing ring further is set towards steel pipe lower end the inside.In order to accomplish this point, at folding up ring of the end of steel pipe equipment, make the end of this ring become and move to inside, play the effect of a metal washer supporting member, thereby the end of it and steel pipe separates.

The shortcoming of this way is that the cost of making and assembling is all very high.

Summary of the invention

Therefore, an object of the present invention is to provide a kind of lining, this lining is made of plastic usually, can insert rapidly in the steel pipe of inflator.

Another object of the present invention provides a kind of lining of strengthening its upper end, demonstrates maximum requirement of strength.

Another object of the present invention provides a kind of disc-shaped part, and the position of known one-tenth one upset own is with the end of mounting rod.

About this final purpose, and for suitable purposes, should be pointed out that under the support of applicant P.9001140.6 Spain's patent shows a kind of dish that is installed on the bar lower end, this will be illustrated afterwards more fully.Described file also illustrates the lining around inflator, and lining itself is fixed on above the steel pipe by the steel pipe fastening of outside and with a riveted joint pin.

In order to realize first purpose of the present invention, plastic bushing has been equipped the reinforcer along radius that extends in a longitudinal direction, plastic lining is with a circumferential and strengthens supporting member, apart from lining upper end certain distance, and having another circumferential to strengthen supporting member, this another circumferential reinforcer is confirmed as the extendible portion of lining upper end.Below the outstanding circumferential supporting member below of these vertical floors, and (be characterized in this space) in the space between two floors that the floor withdrawal moves certain-length behind their front simultaneously.

According to this final arrangement, in the space or between the reinforcer, form two kinds of cavitys, they all occupy the circular perimeter of lining, some after produce between the floor that contracts, and other are formed by described floor itself, these two kinds of cavitys are staggered in described girth.

Steel pipe comprises at least one hook-type fin made from the semi-stamping moulding material of steel pipe sidewall as its part, and this fin stretches into towards steel duct.Depress when lining inserted steel duct adding, this fin becomes in any cavity in the space that is installed between the reinforcer (no matter being in those cavitys between floor or in those cavitys of floor itself), and aspect the position of assembling without any need for special worrying about.

Aspect second purpose, this is to realize that by providing near the top circumferential reinforcer of lining most significant end this reinforcer has enough sizes, so that can bear any mechanical stress.

About the 3rd purpose, we get back to the patent content P.9001140.6 that present patent application person oneself supports, in this patent, lower end at steel pipe, its front is curved backward has a crimping or flange, they extend on the direction vertical with the longitudinal rod line of inflator bar, and therefore forming metallic disc-shaped parts is installed in crimping or the internal base above the flange.

The two all is provided with center hole crimping and dish.The center hole of dish can mounting rod, and plays the effect of end bearing supporting member, and the center hole of crimping also can make bar pass and provide a kind of folder shape packing ring.

Dish is mounted to by this way has upward opening, and the groove that makes its edge be manufactured in the steel pipe is fixed.

According to the present invention, the 3rd purpose of the present invention realizes that by using simply with the dish that direction is opposite usually also in other words, this dish has under shed, and its base plate up-hole.In this case, the groove in the steel pipe is exerted pressure to the edge of base plate, and the base plate that therefore reaches dish retracts to steel duct, and withdraws with respect to the end of steel pipe.

Separate the end folder and its outlet that also make on the bar of this end separate, and have therefore avoided this paper to begin described shortcoming fully.

On the other hand, on lining below the lower end of circumferential reinforcer be provided with a corner cut, utilize this corner cut to make to insert described lining very convenient, and kept the integrity of floor or reinforcer.

On its part, the interior lower end of the center cavity of this lining has a crooked concave surface that cuts, so that when finishing machining, used cutter withdraws from easily.

To brief description of drawings

To more clearly understand all these and other details referring to accompanying drawing, wherein represent below just be used for the guiding:

Fig. 1 is the steel pipe sectional elevation figure that has plastic bushing according to of the present invention;

Fig. 2 is the sectional elevation figure according to lining of the present invention;

Fig. 3 is the front view of this lining outside;

Fig. 4 is the enlarged view that connects thin portion between steel pipe and the lining;

Fig. 5 illustrates the perspective illustration on lining top;

Fig. 6 be according to patent P.9001140 described in the inflator lower end cross-sectional view of prior art;

The last expression of Fig. 7 according to the amplification of inflator of the present invention end thin portion;

Fig. 8 illustrate the bush inside lower end amplification thin portion;

Fig. 9 also is a detail drawing, the following corner cut of the following circumferential reinforcer on the expression lining.

Detailed description of the preferred embodiment

Watch Fig. 1 now, we can understand steel pipe 8 and have lower end 6, top lining 10 and the band dish 7 under shed.In a circle, illustrate between steel pipe and the lining joint be connected, and amplify in Fig. 4 the back.

In Fig. 2,3 and 5, we can observe the particular configuration of lining 10, and this lining 10 has the floor 5 of vertical upper edge radius and the reinforcer of two circumferential, i.e. top reinforcer 2 and bottom reinforcer 3.Top reinforcer 2 forms the extendible portion of the front end 4 on lining top, and bottom reinforcer 3 has certain distance or space with the top reinforcer.

In this space, contract behind the floor 5, can be easy to see from Fig. 5, around the whole circumference formation groove in this space.In the space between upper and lower reinforcement, form cavity 1 corresponding to space between the floor ' with corresponding to the cavity 1 of floor itself, this space can be installed in the hook-type fin in the steel pipe in the middle of two cavitys whichever in the cavity.

Fig. 4 illustrates working in coordination of fin 9 in the cavity 1, for example, and with the form that limits fully.When steel duct was utilized the pressure mounting bush, this lining was out of shape non-permanently, therefore in any position, fin 9 become be placed in arbitrary cavity 1,1 ' in.

In Fig. 6, we can observe the lower end of common inflator, and at this end place, it is an elbow 17 on the direction vertical with the bar 15 of inflator, and dish 16 is placed in elbow 17 inside.Bar utilizes bearing (not indicating) supporting in the base of dish 16, and utilizes groove 13 this dish to be fixed to the inside of steel pipe 6.Clip 14 is connected to external part, is placed on the internal backplane of dish 16.

Can understand characteristics of the present invention in Fig. 7, inflator of the present invention has the opposite dish of direction 7, upward opening and have a fixedly groove of dish 7 base plate excircles.Hole 19 can allow bar pass, and bearing is supported on the upper face of dish 7.The space 11 that separates with the end can make the end of bar and corresponding clip adapt, and the lower end 12 with inflator separates simultaneously.Can also understand on the edge 18 that this dish is placed in steel pipe fully.

In Fig. 8, we can understand the crooked concave surface 21 that cuts at lining 10 interior lower end places, and this concave surface 21 is convenient to the fine finishing of lining, and better fit and tolerance are provided.

In Fig. 9, we wish to emphasize to carry out corner cut 20 according to angle [alpha] on the floor 3 below lining 10, utilize that corner cut 20 is easier to be inserted lining in the steel pipe 8.

Point out that following situation is very important, promptly in case have character of the present invention and advantage, its non-limiting characteristics are not because the change of shape, material or the size of its constituent elements can change its essence by any way, as long as they can not cause the important change of whole assembly.

Claims (4)

1. inflator, this inflator has the steel pipe (8) of an outside, this steel pipe (8) is holding a plastic bushing (10), this lining (10) has vertical floor in several outsides, this lining (10) is installed in the upper end of steel pipe (8), and use a dowel fixes from the outside, this inflator also has a lower end (6), this lower end (6) has less diameter, a plate shape packing ring or metallic disc-shaped parts (16) on lower end (6), have been placed, the opening of these parts (16) is towards the inboard of inflator, is installed on the folding or crooked part (17) in the front of steel tube end part, lays the end of inflator bar (15) with these metallic disc-shaped parts (16), this is to utilize the clip (14) on the outside base plate of described dish to finish, one group of groove (13) that utilization is made in steel pipe self is fixed to dish on the steel pipe, it is characterized in that

Plastic bushing (10) is provided with near the circle of its upper end (4) strengthens supporting member (2) and another circular supporting member (3) of strengthening, this supporting member (3) is parallel with circular reinforcement supporting member (2), at two circular supporting members (2 of strengthening, 3) form a space between, contracting behind the center of lining along the outside of floor (5) on the longitudinal direction of radius, to strengthen supporting member (2 at two kinds, 3) form two types of cavitys between, some of them cavity (1) corresponding to after the position of the floor that contracts, and other have the cavity (1 ') of the big degree of depth, corresponding between the floor that contracts after described along the space of radius, with these cavitys (1,1 ') can be with at least one hook-type fin (9) of packing into with meeting, hook-type fin (9) is made and is stretched into towards steel duct with the semi-stamping moulding material of steel pipe (8) tube wall, wherein the dish of steel pipe lower end (7) is arranged to opening up, so that its edge is supported on the part (18) of crimping backward of described steel pipe front end, the base plate (19) that makes dish (7) simultaneously separates certain distance (11) with the end (12) of steel pipe, this be apart from being installed in a clip (14) on the end of bar (15), and need not this outwardly directed clip.

2. inflator as claimed in claim 1 is characterized in that, the external margin of dish (7) bears the extension that is produced by the groove of making in steel pipe (8) lower end (6) (13), so that fix this dish.

3. inflator as claimed in claim 1 is characterized in that, the base edge (18) of the end portion (6) of steel pipe (8) with the axial vertical direction of this steel pipe on form.

4. inflator as claimed in claim 1, it is characterized in that, following the inner of lining (10) has the otch (21) of a bending, and the lower end of the following circumferential floor (3) of described lining forms a corner cut or inclined-plane (20), and this corner cut or inclined-plane (20) begin to form according to an angle (α) from the outside of floor.

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