• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A pyromechanical separation device for a conductor (1) has a gas generator (6) in a gas space (9). According to the invention, the gas space (9) is sealed by a membrane (8) which faces the conductor (1) and a cavity (12) is provided on the side of the conductor (1) remote from the membrane (8), so that the Membrane (8) forms the separating element. The membrane (8) is preferably folded and extends in the unfolded state to the bottom of the cavity (12), so that a possibly resulting arc is extinguished. The separating device may consist of lower part (4) and cover (5), wherein the membrane (8) and the conductor (1) between the lower part (4) and the lid (5) are clamped. In this case, the side walls (10) of the lid (5) form the strain relief for the conductor (1).
    公开号:AT516268A4
    申请号:T50687/2014
    申请日:2014-09-26
    公开日:2016-04-15
    发明作者:
    申请人:Hirtenberger Automotive Safety；
    IPC主号:
    专利说明:

    The present invention relates to a pyromechanical Trenn¬vorrichtung for a conductor in which a gas generator, preferably a detonator, is housed in a gas space, the gas generator auf¬ inflates a separating element with pressure when it ignites.
    Battery safety systems have the task in automotive safety of shutting off certain circuits in the event of an accident in order to minimize the risk of a fire. While the safety-related systems, such as Hazard warning system, airbag control unit, etc., continue to be supplied with voltage, the power supply to certain consumers with high current flow - such. Heated seats - interrupted, damithier in case of a short circuit there is no fire hazard.
    The development of these disconnectors is already very old, the first switches were to be operated manually after the accident. The next generation are electromechanical components, as shown in DE 29613221 U by Gebauer and Griller. Furthermore, it makes sense to use relays for the purpose of disconnecting the voltage, as described, for example, in US Pat. described in DE 19911128 Cl of Tyco Electro¬nics. These mechanical systems have the disadvantage that the impact of mechanical shocks caused by the Fähr¬ operation tiny interruptions in the power supply, which can lead to malfunction or damage in sensitive equipment. This also applies to the group of disconnectors in which the conductor ends are connected by a press fit in normal operation, which is opened pyrotechnic when needed, for example, in US 6144111 A of BMW darge¬. Vibrations and thermal expansion during heating cause the compound to creep slowly over its lifetime until the effects mentioned above also occur.
    The next step is devices which have a continuous conductor, which is separated if necessary. In DE 10209626 A1 and DE 10209625 A1, a conductor is described which has an explosive charge in the interior, which destroys the conductor as needed. In addition to problems with the Znlnssnncr here is a great
    Disadvantage that detonator and ignition cable are permanently heated and aged by the current flow in the conductor. Therefore, it is close to positioning the igniter next to the line, the current technical state is here by the patent applications of the Fa. Dynamit Nobel DE 102004008120 Al and DE 102004010071 Al formed. DE 102004008120 A1 describes a separating element in which the conductor rail is arranged at 90 ° to the point of separation, DE 102004010071 A1 discloses the cutting die as an independent, inserted bar, wherein in the figures the principle of DE 102004008120 A1 is likewise used for illustration.
    In the development of this idea, the separating element according to EP 1469564 A1 of the company Autoliv is mounted directly on the battery pole, whereby two clamping arms for cable connections are provided. A clamp arm is fixed in the housing and permanently connected to the battery post, the second clamp arm, which can be separated from the battery post by a separator subject to a pyrotechnic element, has a thickening with which it is immovably fixed in the housing.
    These systems work well, but are relatively expensive to manufacture. In particular, the separating piston and the measures for fixing the separation point cause high expenses.
    It is an object of the present invention to provide a pyrotechnic separation device which is easier to manufacture.
    This object is achieved by a pyrotechnic separation device of the aforementioned type according to the invention that the gas space is sealed by a membrane which faces the conductor, and that on the side facing away from the membrane of the conductor, a cavity is provided, so that the Mem¬bran the separator forms.
    Thus, according to the invention, a piston such as is commonly used as a separating element is dispensed with, and the function of the separating element is taken over by a simple membrane.
    Preferably, the conductor has a region weakened in the membrane by force in the cross-section weakened area to form a separation point. In this way, results in a defined breaking point.
    It is expedient here if the weakened region is provided on the side facing away from the membrane and if the conductor in this region has an embossment on the side facing the membrane. In this way, when the conductor is severed, there can be no sharp burr on the side facing the membrane, which could damage the membrane.
    Preferably, the membrane is folded. In this way, it can move in the separation of the conductor into the cavity, without it would have to be stretched, for which larger forces, ie a stronger detonator or even a pyrotechnic propellant charge, would be necessary.
    It is beneficial if the membrane extends to the bottom of the cavity in the deployed state. In this way, a possibly arcing arc between the ends of the disconnected conductor is surely erased.
    In addition, it is favorable if the length of the conductor from the edge of the cavity to the point of separation is less than the depth of the cavity, the difference being a maximum of 2 mm, preferably a maximum of 1 mm. In this way, on the one hand, the ends of the severed conductor can not touch the bottom of the cavity; if they touched him, it would hinder their movement. On the other hand, because the ends of the severed conductor almost touch the ground, it is not possible for the membrane to fall under or behind the conductor ends, which would also hinder its movement.
    A particularly simple embodiment is characterized in that the separating device has a lower part and a lid, wherein the membrane is clamped between the lower part and the lid.
    It is expedient if the lid has a sealing edge, which is pressed into the membrane. In this way, not only a reliable seal, but the sealing edge also causes a reliable attachment of Mem¬bran during activation.
    In this case, it is further expedient if the membrane has a reinforced middle part and, outside the reinforced center part, the wall thickness thereof increases from this to the sealing edge. This wall thickness profile of the membrane results in a particularly secure deployment in the desired manner.
    The construction of the separating device can be kept particularly simple if the side walls of the lid form the strain relief for the conductor and if the gas generator is encapsulated in the lid. The entire separation device then consists only of the lower part, conductor, membrane and cover with an injection-molded igniter, wherein the connection of the lower part and the cover can be made by riveting.
    Preferred materials for the membrane are rubber and silicone, wherein the membrane can be inexpensively manufactured by a dipping process or by an injection molding process.
    With reference to the accompanying drawings, the invention will be explained in more detail. In Fig. 1 an embodiment of the invention is shown in section.
    A conductor 1 is located together with a membrane 8 in a two-part housing, consisting of lower part 4 and cover 5, which at the same time also contains the gas generator 6, usually a detonator. In the manufacture of the cover 5, the igniter is preferably cast in by means of an injection molding process. A sealing edge 7 of the cover 5 presses in the assembled state into the membrane 8 and ensures improved sealing and position fixing of the membrane.
    The lower part 4 has an open-topped cavity 12 which is bounded by a projection 13. The conductor 1 spans the 5
    Cavity 12 and lies on both sides of the cavity 12 at the elevation 13. Lid 5 and base 4 are connected by rivets, so that the conductor 1 and the membrane 8 are firmly clamped. Side walls 10 of the lid 5 are used for insulation and strain relief of the conductor 1. Thickening of the conductor, as provided in EP 1469564 A1, is therefore unnecessary. Outside the housing, the conductor 1 has connections 3a and 3b in the form of holes for receiving a screw on.
    The basic idea of the invention is that the application of force to a separation point 2 of the largely flat conductor 1 takes place by means of the membrane 8. Through the membrane 8, which closes a gas space 9, in which the gas generator 6 is located, its force acts on ignition of the gas generator 6 on the separation point 2, without gas losses take place laterally of the conductor 1. In addition, the membrane 8 acts in such a way that, after separation of the conductor 1 into sections 1a and 1b, it bends and pushes itself between the two sections 1a and 1b. Advantageously, the membrane 8 is folded in the initial state and may, upon activation, unfold to the bottom 11 of the base 4. The unfolding can be particularly controlled by the wall thickness profile of the membrane 8, in this case it has a reinforced middle part, outside of the reinforced middle part the wall thickness increases from this to the sealing edge 7.
    The separation point 2 consists in a weakening of the material cross-section, preferably in thickness. Normally, the weakening takes place on the side facing away from the igniter, but it is advantageous to provide an embossing 2a on the side facing the igniter, whereby, when the conductor 1 is separated, no sharp edge can arise at the top of the two sections 1a and 1b, which leads to increased stress on the membrane 8 Preferably, the length of the two sections la and lb is selected so that in a separated state they extend substantially to the bottom 11 of the lower part 4, the distance should be at most 1 mm, at most 2 mm. Cheap materials for the membrane are rubber or fabric-reinforced rubber and silicone. The production of the membrane 8 takes place according to the material either by immersion or injection molding process.
    权利要求:
    Claims (14)
    [1]
    1. Pyromechanical separation device for a conductor (1), in which a gas generator (6), preferably an igniter, is accommodated in a gas space (9), the gas generator (6) pressurizing a separating element when it is fired, characterized the gas space (9) is tightly closed off by a membrane (8) which faces the conductor (1) and in that a cavity (12) is provided on the side of the conductor (1) facing away from the membrane (8) in that the membrane (8) forms the separating element.
    [2]
    2. Pyromechanical separating device according to claim 1, characterized in that the conductor (1) in the area acted upon by the membrane (8) by force has a region weakened in cross-section to form a separation point (2).
    [3]
    A pyromechanical separation device according to claim 2, characterized in that the weakened region is provided on the side facing away from the membrane (8), and in that region the conductor (1) has an embossment (2a) on the side facing the membrane (8).
    [4]
    4. Pyromechanical separating device according to one of claims 1 to 3, characterized in that the membrane (8) is gefal¬tet.
    [5]
    A pyromechanical separation device according to claim 4, characterized in that the membrane (8) in the deployed state extends to the bottom of the cavity (12).
    [6]
    Pyromechanical separating device according to one of claims 2 to 5, characterized in that the length of the conductor (1) from the edge of the cavity (12) to the separation point (2) is less than the depth of the cavity (12), the difference being at most 2 mm, preferably at most 1 mm.
    [7]
    7. Pyromechanical separating device according to one of claims 1 to 6, characterized in that it comprises a lower part (4) and a lid (5), wherein the membrane (8) zwi¬schen the lower part (4) and the lid (5) clamped is.
    [8]
    8. Pyromechanical separating device according to claim 7, characterized in that the cover (5) has a sealing edge (7), which is pressed into the membrane (8).
    [9]
    9. Pyromechanical separating device according to claim 7 or 8, characterized in that the membrane (8) has a reinforced middle part and that outside of the reinforced middle part, the wall thickness of which increases towards the sealing edge (7).
    [10]
    Pyromechanical separating device according to one of claims 7 to 9, characterized in that side walls (10) of the cover (5) form the strain relief for the conductor (1).
    [11]
    11. Pyromechanical separating device according to one of claims 7 to 10, characterized in that the gas generator (6) in the cover (5) is encapsulated with.
    [12]
    Pyromechanical separation device according to any one of claims 1 to 11, characterized in that the membrane (8) is made of rubber or silicone.
    [13]
    A pyromechanical separation device according to any one of claims 1 to 12, characterized in that the membrane (8) is made by a dipping process.
    [14]
    A pyromechanical separation device according to any one of claims 1 to 12, characterized in that the membrane (8) is made by an injection molding process.
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    同族专利:
    公开号 | 公开日
    AT516268B1|2016-04-15|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    WO2007134875A1|2006-05-22|2007-11-29|Takata-Petri Ag|Method and devicefor single and permanent disconnection of an electrical connection, in particular in a vehicle|
    DE102010035684A1|2010-08-27|2012-03-01|Auto-Kabel Managementgesellschaft Mbh|Electric disconnecting device and method for electrically disconnecting connecting parts by means of a separating device|DE102020204302A1|2020-04-02|2021-10-07|Joyson Safety Systems Germany Gmbh|Power line separator|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    ATA50687/2014A|AT516268B1|2014-09-26|2014-09-26|Pyromechanical separator|ATA50687/2014A| AT516268B1|2014-09-26|2014-09-26|Pyromechanical separator|
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