EP1994289A1 - Pyrotechnischer aktor - Google Patents
Pyrotechnischer aktorInfo
- Publication number
- EP1994289A1 EP1994289A1 EP07711670A EP07711670A EP1994289A1 EP 1994289 A1 EP1994289 A1 EP 1994289A1 EP 07711670 A EP07711670 A EP 07711670A EP 07711670 A EP07711670 A EP 07711670A EP 1994289 A1 EP1994289 A1 EP 1994289A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- piston
- housing
- actuator
- piston rod
- igniter
- 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
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/19—Pyrotechnical actuators
Definitions
- the invention relates to a pyrotechnic actuator according to the preamble of claim 1
- Such an actuator is described for example in DE 102 03 710 C1.
- a compact design is desired and on the other hand a high level of functional reliability is required.
- Such actuators are used, for example, to trigger airbags, belt tensioners, roll bars or the like in motor vehicle technology.
- actuators will also be used to actuate other safety devices, in particular for personal protection, namely to lift the hood in the event of a person impacting the hood of a motor vehicle in order to dampen the effects of the impact on the person at least some personal protection is achieved.
- a pyrotechnic actuator is triggered by triggering the igniter, which is located on the piston rod opposite end of the housing, the piston and piston rod in a position in which the piston rod or the element located thereon on the safety device or the corresponding element of the safety device acts oppressively.
- the arrangement of the igniter is mandatory from the constructively predetermined installation situations so that it is arranged on the side facing away from the piston rod of the pyrotechnic actuator, so that appropriate installations, lines and the like do not have to be installed in the area where the piston rod from the Housing exits.
- the present invention seeks to provide a pyrotechnic actuator, which can be realized by implementing the conventional construction principle as a pulling pyrotechnic actuator. The solution to these problems is provided in conjunction with the preamble by the characterizing features of claim 1.
- a pulling pyrotechnic actuator which has a relation to the housing projecting positioning of the piston rod in the initial position and in the end position, the piston rod is displaced in the direction of the housing, so that the piston rod is pulled pulling.
- the means are formed by channels which connect a chamber receiving the igniter to a chamber, of which at least one wall part is formed by the area of the piston from which the piston rod protrudes.
- a preferred first embodiment is proposed, which is characterized in that the igniter is inserted into an opening of the housing bottom, which faces away from the housing side, which is tangible by the piston rod, wherein the housing as a solid body with cavity formed therein for Receiving the piston is formed and the housing body has channels or holes which connect the gas outlet of the igniter with the housing bottom facing away from the surface of the piston.
- the training may consist in that of
- Detonator is inserted into an opening at the bottom of the piston, which faces away from the piston side, projects from the piston rod, the piston channels or holes that connect the gas outlet of the igniter with the piston surface, which is facing away from the ground and from which protrudes the piston rod.
- the channels or bores are provided in the housing designed as a solid body, while in the second development the channels are provided in the piston designed as a solid part.
- a particularly preferred development which is also considered to be inventive in an independent way, is that on the housing a second actuator parallel to the direction of the piston slidably disposed and sealed against the jacket of the housing, wherein between a wall of the actuator and the piston rod of the Wegifbaren wall of the housing, a sealed chamber is formed, and that the chamber is connected via channels or holes with the cavity in which the piston is arranged.
- This design it is achieved that during adjustment of the piston, at the same time or offset in time, an adjustment of the second actuator takes place.
- This second actuator can be displaced, for example, in the event of a triggering of the igniter and in the case of a corresponding retracted piston / piston rod unit by means of the pressurized gas of the igniter against the retraction movement of the piston rod in order to be able to trigger further functions. It is thus realized a double-acting actuator, the pulling and pushing works.
- the channels or bores open into a region of the cavity, which is in the initial position of the piston above the surface of the piston, of which the piston rod protrudes.
- the channels or holes open into a region of the cavity, which is in the initial position of the piston below the surface of the piston from which protrudes the piston rod.
- the second actuator should only be carried out when the adjustment of the piston together with the piston rod is made partially or completely, it is provided that the channels or holes open into a region of the cavity, which is in the initial position of the piston below the surface of the piston from which protrudes the piston rod.
- the second actuator can also be provided that the second
- Actuator is designed as a cup-shaped sleeve which is pushed onto the housing and whose bottom is sealed by the piston rod.
- the second actuating member has outer projecting functional surfaces, by means of which, when the actuator is displaced relative to the housing, a process can be triggered.
- Such functional aids can be supported on components or functional elements that can be moved accordingly upon actuation of the igniter. It can be provided that the functional surfaces are formed by an outwardly projecting flange edge of the cup-shaped sleeve.
- Figure 1 seen a first embodiment of a pyrotechnic actuator in the central longitudinal section;
- Figure 2 shows a second embodiment in the same view
- Figure 3 shows a third embodiment in the same view in the starting position
- FIG. 4 likewise in a first stage of the sequence of movements when the actuator is in the end position
- FIG. 5 likewise with additionally adjusted elements of the actuator after the triggering of the igniter;
- Figure 6 seen a variant in the position analogous to Figure 4.
- FIG. 1 shows a first embodiment of a pyrotechnic actuator as a pulling actuator.
- the actuator has a housing 1, in which a piston 2 is mounted vertically displaceable in the drawing.
- the housing 1 has a cavity 3, in which the piston 2 is displaceable in the direction of the movement arrow 4, wherein the piston 2 is peripherally sealed by a seal 5 against the inner surface of the cavity 3.
- a pyro-technical igniter 6 is arranged, whose gas outlet is in communication with the cavity 3, so that the piston 2 by a released during the ignition of the igniter 6 gas quantity from the starting position shown in Figure 1 is movable in an end position.
- a connected to the piston 2 piston rod 7 passes through an opening of the housing 1 sealed.
- the piston rod 7 initiates a process, unlocks, for example, a safety device.
- the piston rod 7 is arranged protruding from the housing 1 in the starting position according to FIG. In the final position is moved the piston 2 in the drawing Figure 1 down and also displaces the piston rod 7 downwards.
- means are provided, by means of which the gas quantity released upon ignition of the igniter 6 is directed to the side of the piston 2 and acts on the side of the piston from which the piston rod 7 protrudes.
- These means are formed by channels 8 which connect a chamber 6 receiving the igniter to a chamber 9, of which at least one wall part is formed by the surface of the piston 2 from which the piston rod 7 protrudes.
- the igniter 6 is inserted into an opening of the housing bottom, which faces away from the housing side, which can be reached by the piston rod 7.
- the housing 1 is designed as a solid body, for example of two half-shells, with cavity 3 formed therein for receiving the piston 2, the housing body having the channels 8 or bores connecting the gas outlet of the igniter 6 with the surface of the piston 2 facing away from the housing bottom ,
- the connection formed, for example, as a plug connection for the igniter 6 is thus provided on the side facing away from the piston rod 7 housing side.
- the housing 1 is surrounded by a cup-shaped sleeve 10, the bottom of which is penetrated by the piston rod 7.
- a flange plate 11 closes the mouth of the cup-like sleeve 10 facing away from the same.
- the housing 1 or also the cup-like sleeve 10 is sealed by caulking, welding or other types of connection of the flange 11 to the housing 1 and / or the cup-like sleeve 10.
- the flange 11 may also penetrate the wall of the cup-shaped sleeve 10 and then caulked.
- This outer cup-shaped sleeve 10 forms a protection for the intended Use of the actuator and in particular this serves to ensure that the unit is exempted from explosives law.
- the receptacle for the igniter 6 is located in the flange 11.
- a stop 12 fixed to the housing is formed in the hollow chamber 3, which stop constitutes a limit stop for the travel of the piston 2.
- a return spring 13 is provided in the form of a helical compression spring, so that optionally the piston 2 can be returned to the initial position after triggering. The arrangement of such a return spring can also be provided elsewhere.
- the housing 1 ' is designed as a cup-shaped sleeve, wherein in the cavity of the piston 2 ' according to the movement arrow 4 'is slidably disposed.
- the inner wall of the housing 1 ' has a seal 5 ' , so that a seal against the piston 2 ' takes place.
- the piston 2 ' may be formed as a one-piece solid element.
- the piston 2 ' is formed by two half-elements, which are arranged within a further pot-like housing and fixedly connected thereto. The unit is held by a flange 15, which is caulked to the element 14 or firmly connected in any other suitable manner.
- means are again provided to guide the amount of gas liberated upon ignition of the igniter 6 ' to the side of the piston 2 ' from which the piston rod T protrudes.
- These means are formed by channels 8 ' which connect a detonator 6 ' receiving chamber of the piston 2 ' with a chamber 9 ' , of which at least one wall part by the surface of the piston 2 'is formed, from which the piston rod 7 ' protrudes .
- the igniter 6 ' is inserted into an opening at the bottom of the piston 2 ' or the flange 15, which faces away from the piston side, from which the piston rod 7 ' protrudes.
- the piston 2 ' in this case has the channels 8 ' or holes which connect the gas outlet of the igniter 6 ' with the piston surface from which the piston rod 7 ' protrudes.
- a second actuator 17 is displaceably arranged parallel to the actuating direction of the piston and sealed against the jacket of the housing on the housing 1 or on the cup-shaped sleeve 10 forming a unit with the housing 1.
- a seal 18 is provided between the outer jacket of the cup-shaped sleeve 10 and the inner jacket of the second actuator 17. Between a wall 19 of the second actuator 17 and the attacked by the piston rod 7 wall of the housing 1 and 10, a sealed chamber 20 is formed. The seal is made via the seals 18 and 21. This chamber 20 is connected via channels 22 or holes with the cavity 3, in which the piston 2 is slidably disposed. In the embodiment of Figure 6, the channels 22 or holes open into a region of the cavity 3, which is in the initial position of the piston 2 above the surface of the piston 2, from which the piston rod 7 protrudes.
- the second actuator 17 is formed as a cup-shaped sleeve which is pushed onto the housing 1 and the cup-shaped sleeve 10 ' and whose bottom is penetrated by the piston rod 7 sealed.
- the second actuator 17 outwardly projecting functional surfaces 23, by means of which when moving the second actuator 17 relative to the housing 1 or 10, a process can be triggered, so certain with the functional surfaces 23 coupled elements are actuated.
- the functional surfaces 23 are formed by an outwardly projecting flanged edge of the second actuator formed as a cup-shaped sleeve.
- the movement of the piston 2 in the end position can be damped in order to reduce excess kinetic energy. This can be done by one or more deformation elements, which lie in the direction of movement of the piston.
- the invention is not limited to the embodiment, but in the context of the disclosure often variable. All new, disclosed in the description and / or drawing single and combination features are considered to be erfindungschert- lent.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Automotive Seat Belt Assembly (AREA)
- Actuator (AREA)
- Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102006011525 | 2006-03-10 | ||
PCT/EP2007/001647 WO2007104421A1 (de) | 2006-03-10 | 2007-02-27 | Pyrotechnischer aktor |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1994289A1 true EP1994289A1 (de) | 2008-11-26 |
EP1994289B1 EP1994289B1 (de) | 2009-07-22 |
Family
ID=38068966
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07711669A Not-in-force EP1994288B1 (de) | 2006-03-10 | 2007-02-27 | Pyrotechnischer aktor |
EP07711670A Not-in-force EP1994289B1 (de) | 2006-03-10 | 2007-02-27 | Pyrotechnischer aktor |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07711669A Not-in-force EP1994288B1 (de) | 2006-03-10 | 2007-02-27 | Pyrotechnischer aktor |
Country Status (4)
Country | Link |
---|---|
EP (2) | EP1994288B1 (de) |
AT (2) | ATE437308T1 (de) |
DE (2) | DE502007001301D1 (de) |
WO (2) | WO2007104421A1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110873545A (zh) * | 2018-09-02 | 2020-03-10 | 孝感定原电子科技有限公司 | 一种火工作动器 |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3597919A (en) * | 1969-03-24 | 1971-08-10 | Gen Electric | Linear gas generator actuated latching and thrusting device |
DE2253657C2 (de) * | 1972-11-02 | 1984-09-06 | Dynamit Nobel Ag, 5210 Troisdorf | Vorrichtung zum Spannen von Sicherheitsgurten in Fahrzeugen |
US4037821A (en) * | 1976-08-10 | 1977-07-26 | The United States Of America As Represented By The Secretary Of The Army | Telescoping retractor |
US4054032A (en) * | 1976-09-03 | 1977-10-18 | Networks Electronic Corporation | Explosive actuated pin puller |
JPS5912910Y2 (ja) * | 1978-08-25 | 1984-04-18 | 株式会社日本自動車部品総合研究所 | シ−トベルト引締め装置の逆戻り防止装置 |
FR2721073B1 (fr) * | 1994-06-09 | 1996-08-30 | Ecia Equip Composants Ind Auto | Actionneur à déclenchement piloté de manÓoeuvre d'un organe d'un véhicule automobile. |
FR2807123B1 (fr) * | 2000-03-29 | 2002-09-13 | Pyroalliance | Ecrou de separation rearmable a faible niveau de choc induit |
US6942185B2 (en) * | 2002-05-07 | 2005-09-13 | Atair Aerospace, Inc. | Pneumatic riser release |
US20040007123A1 (en) * | 2002-07-10 | 2004-01-15 | Ritchie Robert S. | Hermetically sealed actuator |
-
2007
- 2007-02-27 EP EP07711669A patent/EP1994288B1/de not_active Not-in-force
- 2007-02-27 AT AT07711670T patent/ATE437308T1/de active
- 2007-02-27 WO PCT/EP2007/001647 patent/WO2007104421A1/de active Application Filing
- 2007-02-27 AT AT07711669T patent/ATE439525T1/de active
- 2007-02-27 DE DE502007001301T patent/DE502007001301D1/de active Active
- 2007-02-27 EP EP07711670A patent/EP1994289B1/de not_active Not-in-force
- 2007-02-27 WO PCT/EP2007/001646 patent/WO2007104420A1/de active Application Filing
- 2007-02-27 DE DE502007001132T patent/DE502007001132D1/de active Active
Non-Patent Citations (1)
Title |
---|
See references of WO2007104421A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE502007001132D1 (de) | 2009-09-03 |
WO2007104420A1 (de) | 2007-09-20 |
WO2007104421A1 (de) | 2007-09-20 |
EP1994288A1 (de) | 2008-11-26 |
EP1994289B1 (de) | 2009-07-22 |
EP1994288B1 (de) | 2009-08-12 |
DE502007001301D1 (de) | 2009-09-24 |
ATE437308T1 (de) | 2009-08-15 |
ATE439525T1 (de) | 2009-08-15 |
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