EP2179245A1 - Vorrichtung mit zwei bauteilen, die über eine trennschraube lösbar miteinander verbunden sind - Google Patents
Vorrichtung mit zwei bauteilen, die über eine trennschraube lösbar miteinander verbunden sindInfo
- Publication number
- EP2179245A1 EP2179245A1 EP08785060A EP08785060A EP2179245A1 EP 2179245 A1 EP2179245 A1 EP 2179245A1 EP 08785060 A EP08785060 A EP 08785060A EP 08785060 A EP08785060 A EP 08785060A EP 2179245 A1 EP2179245 A1 EP 2179245A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- separating
- components
- charge
- separation
- parachute
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B3/00—Blasting cartridges, i.e. case and explosive
- F42B3/006—Explosive bolts; Explosive actuators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B10/00—Means for influencing, e.g. improving, the aerodynamic properties of projectiles or missiles; Arrangements on projectiles or missiles for stabilising, steering, range-reducing, range-increasing or fall-retarding
- F42B10/32—Range-reducing or range-increasing arrangements; Fall-retarding means
- F42B10/48—Range-reducing, destabilising or braking arrangements, e.g. impact-braking arrangements; Fall-retarding means, e.g. balloons, rockets for braking or fall-retarding
- F42B10/56—Range-reducing, destabilising or braking arrangements, e.g. impact-braking arrangements; Fall-retarding means, e.g. balloons, rockets for braking or fall-retarding of parachute or paraglider type
Definitions
- the invention relates to a device with two components, which are releasably connected to one another via a separating screw, according to the features specified in the preamble of claim 1.
- Such a device is known from DE 38 00 330 A1.
- a parachute cartridge is connected to the rear wall of the active charge releasably via a separating screw.
- the two interconnected components comprise axial telescopic guide members which are disposed about the separating screw and engage with each other.
- annular clearance In the area of the plane of the parting line between the two components, an annular clearance (fillet groove) is provided, so that the gases released upon activation of the separation charge escape into the fillet groove and move the parachute cartridge axially relative to the active charge along the guide parts.
- a pyrotechnic charge is used in the separating screw of the known device, by means of which the separation of the separating screw is initiated by deflagration. It has proved to be disadvantageous in this case that when using a pyrotechnic separation charge for the separation of the screw, a relatively large amount of explosive is needed. Therefore, a correspondingly large recess in the separating screw is provided. In addition, upon activation of the separation charge, a correspondingly large amount of hot gases are generated, which may easily damage nearby components of the device, etc. In the known device, it is also necessary to arrange in the dividing charge comprehensive cylindrical side wall of the separating screw an annular predetermined breaking point, along which ruptures the separating screw upon activation of the separating charge. Apart from the fact that the introduction of such a predetermined breaking point causes additional costs, it must be ensured in the intended use of the separating screw that the predetermined breaking point is located exactly in the range between the parts to be separated Kehlnut.
- DE 195 32 746 A1 also discloses a separating screw for the detachable connection of two components, in which a detonative explosive is used as the separating charge instead of a pyrotechnic material.
- a detonative explosive is used as the separating charge instead of a pyrotechnic material.
- an annular predetermined breaking point is also required in this known separating screw for reproducible tearing.
- the invention has for its object to provide a device of the type mentioned in which in the case of activation of the separation charge on the one hand, a rapid axial separation of the interconnected components and on the other hand despite high reliability relative to known separating screws relative small amount of charge is needed.
- the invention is based essentially on the idea of using a detonative explosive instead of a pyrotechnic charge as the separating charge. Surprisingly, it has been found that with such a charge even when using relatively small amounts of charge not only a secure separation of the separating screw, but by exploiting the resulting in the detonation highly stressed gases can also achieve a rapid and reproducible displacement of the components to be separated.
- FIG. 1 shows a longitudinal section of two by a separating screw interconnected parachute cassettes of a discharge body.
- FIG. 3 shows a longitudinal section corresponding to Fig.1 after complete separation of the two parachute cassettes.
- FIG. 1 shows an arrangement of two parachute cassettes 2, 3, which are fastened on the rear side to a not shown active charge of a discharge body.
- the first parachute cartridge 2 containing a brake parachute 4 is fastened to the second parachute cartridge 3 contained by a rotary parachute (not shown) by means of a separating screw 5.
- the two parachute cassettes 2, 3 have arranged around the separating screw 5 around, axially telescopically interlocking guide parts 6, 7.
- an outwardly directed cylindrical guide member 6 is connected to the rear wall 8 of the second parachute cartridge 3 and provided on the rear wall 9 of the first parachute cartridge 2 in the cylindrical guide member 6 of the rear wall 8 slidably mounted piston-shaped guide member 7.
- annular space 10 is provided around the separating screw 5. This clearance 10 is limited on the one hand by the bottom 11 of the cylindrical guide member 6 of the second parachute cartridge 3 and on the other hand by the bottom 12 of the piston-shaped guide member 7 of the first parachute cartridge 2.
- the separating screw 5, which holds the two parachute cassettes 2, 3 together, has a recess 14 extending in the direction of its longitudinal axis 13, in which a separating charge 15 acting as a detonator is contained.
- the brake parachute 4 is then opened and the first parachute cartridge 2 is thrown off, the separation charge 15 of the release screw 5 is electrically ignited by means of a mechanism known per se (FIG.
- the separating screw 5 then ruptures in the region of the annular free space 10, and the process-related resulting, highly strained gases expand into the annular space 10. As a result, the separation process is initiated, the gas-tightness between the cylindrical guide member 6 and the piston-shaped guide member 7 via an O-ring 16 is ensured (Fig.2).
- the device according to the invention may also comprise only one parachute cartridge, which is connected to the active charge via a separating screw.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Portable Nailing Machines And Staplers (AREA)
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102007039011A DE102007039011A1 (de) | 2007-08-17 | 2007-08-17 | Vorrichtung mit zwei Bauteilen, die über eine Trennschraube lösbar miteinander verbunden sind |
| PCT/EP2008/006107 WO2009024244A1 (de) | 2007-08-17 | 2008-07-25 | Vorrichtung mit zwei bauteilen, die über eine trennschraube lösbar miteinander verbunden sind |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2179245A1 true EP2179245A1 (de) | 2010-04-28 |
| EP2179245B1 EP2179245B1 (de) | 2012-01-11 |
Family
ID=40042745
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP08785060A Not-in-force EP2179245B1 (de) | 2007-08-17 | 2008-07-25 | Vorrichtung mit zwei bauteilen, die über eine trennschraube lösbar miteinander verbunden sind |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP2179245B1 (de) |
| AT (1) | ATE541179T1 (de) |
| DE (1) | DE102007039011A1 (de) |
| WO (1) | WO2009024244A1 (de) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103935522B (zh) * | 2014-03-03 | 2016-06-15 | 浙江大学 | 一种旋翼式无人机失控坠落保护装置以及保护方法 |
| CN108438236A (zh) * | 2018-01-18 | 2018-08-24 | 倪惠芳 | 一种无人机空中防坠落装置 |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3800330A1 (de) | 1988-01-08 | 1989-07-20 | Diehl Gmbh & Co | Abwurfkoerper mit fallschirm |
| DE19532746A1 (de) | 1995-09-05 | 1997-03-06 | Rheinmetall Ind Ag | Trennschraube |
| DE29521679U1 (de) * | 1995-09-05 | 1998-03-12 | Rheinmetall Industrie AG, 40882 Ratingen | Trennschraube |
| FR2862131B1 (fr) * | 2003-11-06 | 2006-06-30 | Eads Space Transportation Sa | Raccord pyrotechnique a parties dissociables et lanceur comportant au moins un tel raccord |
| FR2883342B1 (fr) * | 2005-03-21 | 2007-06-08 | Dassault Aviat | Dispositif d'assemblage a rupture pyrotechnique |
| DE102005030090B4 (de) * | 2005-06-27 | 2007-03-22 | Diehl Bgt Defence Gmbh & Co. Kg | Abwerfbare Vorsatzhaube sowie Flugkörper mit abwerfbarer Vorsatzhaube |
-
2007
- 2007-08-17 DE DE102007039011A patent/DE102007039011A1/de not_active Withdrawn
-
2008
- 2008-07-25 WO PCT/EP2008/006107 patent/WO2009024244A1/de not_active Ceased
- 2008-07-25 AT AT08785060T patent/ATE541179T1/de active
- 2008-07-25 EP EP08785060A patent/EP2179245B1/de not_active Not-in-force
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2009024244A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2009024244A1 (de) | 2009-02-26 |
| DE102007039011A1 (de) | 2009-02-19 |
| EP2179245B1 (de) | 2012-01-11 |
| ATE541179T1 (de) | 2012-01-15 |
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