DE102007057551A1 - Miniaturized force element - Google Patents

Abstract

A miniaturized force element (10) is described which has a cylindrical guide element (12) in which a working element (14) is provided. A closure element (26) has an ignition device (32) for an explosive (42) provided in a charge space (40) of the working element (14). The working element (14) is formed kappena (24) and preferably formed by a sheet metal part produced by drawing. The closing element (26), the cap-like working element (14) and the cylindrical guide element (12), which is preferably likewise formed by a sheet-metal part produced by a drawing technique, are sealingly connected to one another, preferably welded. The thin cylindrical side wall (24) of the working element (14) has a predetermined breaking point (44).

Description

The The invention relates to a force element according to the preamble of the claim 1.

Known Force elements work with the help of a pyrotechnic phrase, which is ignited, burns, developing gas and other components that expand and one effect. H. Move work item. The work item is, for example, designed as a piston.

The used for reaching components of such known power elements are usually complex in nature and usually made by rotation. The seal between the guide element and the working element is by fits and / or by sealing elements realized. However, fits require a corresponding production cost. This affects the manufacturing costs. By sealing elements or closed by peeling force elements have the defect that they contribute to possible environmental flows storage are not hermetically sealed. Another shortcoming of such known power elements is their relatively large volume of construction. The used pyrotechnic propellant charges known power elements have relatively large masses and burn with the formation of slag and smut, whereby adjacent mechanical components disturbed can be.

In Knowledge of these circumstances, the invention is based on the object to create a force element of the type mentioned, the simple and inexpensive small volume can be produced, d. H. miniaturized, and the above mentioned defects does not have.

These The object is achieved by the Characteristics of claim 1 solved. Preferred embodiments or further developments of the miniaturized invention Force element are characterized in the subclaims.

at the miniaturized invention Power element is expediently at least the cap-like working element of a drawing technique formed sheet metal part formed. Appropriately, is also the guide element for the Working element formed by a drawing sheet metal part. Of particular importance is that the cap-like trained Work item a thin one cylindrical side wall has, so that the working element against the cylindrical guide element reliable in a simple way seals by the thin Side wall of the working element by the explosive in the Charge space generated pressure is expanded and on the inside of the guide element sealing tight and rubbing comes to rest, so own sealing elements are dispensable. By the said friction is in an advantageous Way a bouncing of the working element when reaching the end position prevented.

The advantageously formed by a thin-walled sheet metal part cap-like working element and in an advantageous manner also formed by a sheet metal part guide element enable a cost-effective Production and small dimensions of the force element according to the invention.

The cap-like work element can additionally another, for example. Drehtechnisch manufactured component, such as a piercing needle o. The like. exhibit.

The guide element of the miniaturized invention Force element can with a the end of the working path of the working element determining beaded be formed so that at the end of the work path in advantageous No parts are thrown away.

Of the an explosive-containing charge space of the miniaturized invention Force element is at rest. H. Bearing condition hermetically sealed locked. This is achieved by the sleeve of the End element of the miniaturized force element, the thin cylindrical Sidewall of the working element and the cylinder sleeve of the guide element sealingly welded together. This can happen about a laser welding act.

at the ignition of the explosive located in the cargo space ruptures in the Charge space generated pressure in the thin side wall of the working element provided predetermined breaking point, so that the originally fixed Working element is released and is in the leadership element until the end of his Arbeitsweges can move.

Of the Charge space can be an additional element to reduce the charge volume exhibit. In this additional element may, for example, to an inert material act.

In the miniaturized force element according to the invention, the charging of the charge space does not consist of a pyrotechnic charge but of a primary or secondary explosive, which generates substantially gas and negligible or no metal compounds during its conversion. The explosive is advantageously phlegmatized by additives and processing technology so far that it does not detonate under the given conditions but merely burns off. In this way, a sufficiently shock-wave acceleration of the cap-like working element is achieved in the guide element.

The Minimization of charging advantageously also allows one increase the safety of the force element according to the invention.

Further Details, features and advantages will be apparent from the following Description of an embodiment shown enlarged in the drawing of the miniaturized invention Force element.

The figure shows a longitudinal sectional view of an embodiment of the miniaturized force element 10 that is a guiding element 12 for a work item 14 having.

The guide element 12 is formed by a sheet metal part produced by drawing; it is as a cylinder sleeve 16 formed at one end with an outer peripheral flange 18 and at its second end remote therefrom with a crimp rim 20 is trained. The crimp rim 20 determines the end of the work path of the work item 14 ,

The work item 14 is formed by a sheet metal part produced by drawing, it has an end wall 22 and a cylindrical side wall integrally connected to said material 24 on.

The cap-like working element 14 is with a finishing element 26 combined. The final element 26 has an insulating body 28 on, through which spaced from each other two connection elements 30 extend, which with a Zündbrückenelement 32 are contacted. The ignition bridge element 32 is at the inner end face 34 of the insulating material 28 appropriate.

The insulating body 28 of the final element 26 is from a sleeve 36 enclosed. The sleeve 36 , the cylindrical side wall 24 of the cap-like working element 14 and the cylinder sleeve 16 of the guide element 12 are at the side of the miniaturized force element 10 at which the connection elements 30 protrude, welded together sealingly. This circumferential weld is indicated by the reference numeral 38 designated.

Between the inner end face 34 of the final element 26 and the front wall 22 of the cap-like working element 14 is a cargo space 40 Definitely, for an explosive 42 is provided.

Is attached to the connection elements 30 an ignition voltage applied, so the ignition bridge element melts 32 , causing the explosive 42 is ignited. The generated thereby gas ie internal pressure causes a circumferential predetermined breaking point 44 in the thin cylindrical side wall 24 of the work item 14 rips apart and the working element 14 in the guide element 12 becomes free.

The circumferential breaking point 44 in the cylindrical side wall 24 of the cap-like working element 14 is designed, for example, as a circumferential notch or groove.

In the miniaturized force element according to the invention 10 can the work path of the work item 14 For example, 3 mm and the longitudinal dimension of the guide element 12 For example, be 4 mm. The outer diameter of the force element 10 can z. B. 2.3 mm.

At the explosive 42 in the cargo area 40 it is preferably a phlegmatized explosive having a mass of ≤ 1 mg.

The last-indicated values should only be the size ratios of the miniaturized force element according to the invention 10 clarify; Of course, other dimensions and explosive masses are possible.

10

miniaturized force member

12

Guide element (from 10 For 14 )

14

Work item (from 10 in 12 )

16

Cylinder sleeve (from 12 )

18

Circumferential flange (from 16 )

20

Border edge (from 16 )

22

Front wall (from 14 )

24

Cylindrical sidewall (from 14 )

26

End element (from 10 in 14 )

28

Insulating body (from 26 For 30 and 32 )

30

Connection elements (from 26 For 32 )

32

Ignition bridge element (at 34 )

34

Inner face (from 28 )

36

Sleeve (on 28 )

38

Welding (between 36 . 24 and 16 )

40

Cargo space (between 34 and 22 For 42 )

42

Explosives (in 40 )

44

Breaking point (in 24 )

Claims (11)

Miniaturized force element ( 10 ), with a guide element ( 12 ), in which a working element ( 14 ) and with a terminating element ( 26 ), which has an ignition device ( 32 ), wherein the closing element ( 26 ) and the working element ( 14 ) a cargo space ( 40 ), characterized in that the working element ( 14 ) cap-like with a thin side wall ( 24 ) is formed, that the closing element ( 26 ), the working element ( 14 ) and the guide element ( 14 ) are sealingly connected together, that the thin side wall ( 24 ) of the working element ( 14 ) a predetermined breaking point ( 44 ), and that in the cargo space ( 40 ) an explosive ( 42 ) is provided. Miniaturized force element ( 10 ) according to claim 1, characterized in that the cap-like working element ( 14 ) is formed by a sheet metal part produced by drawing. Miniaturized force element ( 10 ) according to claim 1 or 2, characterized in that the cap-like working element ( 14 ) an end wall ( 22 ) and a cylindrical side wall ( 24 ) having. Miniaturized force element ( 10 ) according to claim 1, characterized in that also the guide element ( 12 ) is formed by a sheet metal part produced by drawing. Miniaturized force element ( 10 ) according to claim 4, characterized in that the guide element ( 12 ) as a cylinder sleeve ( 16 ) is formed, which at its one end with an outer circumferential flange ( 18 ) and at its remote second end with a the end of the working path of the working element ( 14 ) determining crimping edge ( 20 ) is trained. Miniaturized force element ( 10 ) according to claim 1, characterized in that the closing element ( 26 ) one in a sleeve ( 36 ) fixed insulating body ( 28 ) with an inner end face ( 34 ), wherein through the insulating body ( 28 ) spaced from each other connecting elements ( 30 ) which engage with one on the inner face ( 34 ) of the insulating material body ( 28 ) mounted ignition bridge element ( 32 ) are contacted. Miniaturized force element ( 10 ) according to claim 5 and 6, characterized in that the sleeve ( 36 ) of the closing element ( 26 ), the thin cylindrical side wall ( 24 ) of the cap-like working element ( 14 ), and the cylinder sleeve ( 16 ) of the guide element ( 12 ) at the end of the miniaturized force element ( 10 ), to which the connecting elements ( 30 protrude, are welded together sealingly. Miniaturized force element ( 10 ) according to claim 7, characterized in that in the thin cylindrical side wall ( 24 ) of the cap-like working element ( 14 ) predetermined breaking point ( 44 ) of a notch, a groove, of the weld ( 36 ) itself, or is formed by the heat affected zone. Miniaturized force element ( 10 ) according to claim 1, characterized in that the explosive ( 42 ) containing charge space ( 40 ) has an additional element to reduce the charge volume. Miniaturized force element ( 10 ) according to claim 1, characterized in that the in the cargo space ( 40 ) explosives ( 42 ) is a primary or secondary explosive. Miniaturized force element ( 10 ) according to claim 10, characterized in that the explosive ( 42 ) is phlegmatized by additives and processing technology.