Destruction-free press connection on pyromechanical securing elements
View Patent ↗The invention relates to a pyromechanical securing element for the mechanical connection of two components. The securing element comprises a covering and a pyrotechnical propellant charge is arranged in the head part thereof, said propellant charge being adjacent to an adapter, and securing means or a stop for the first component are arranged on the rear part of the covering and a second component can be pushed onto the covering between the first component and the head part. The covering on the head part comprises expected fracture indents extending in the longitudinal direction which tear open the covering in the head area when the propellant charge is ignited and the first component is rigidly connected to the second component in order to allow the adapter to bend. The aim of the invention is to securely anchor the covering to the adapter without using extreme force. Said invention is characterized in that the groove is arranged in the adapter in such a manner that it at least sectionally surrounds the outer periphery thereof, and that a radially protruding collar is arranged on the outer surface of the cover before the cover is anchored to the adapter, and the groove disposed in the adapter is flush with the collar of the cover and at least one part of the collar is pressed into the groove in order to anchor the cover with the adapter.
1. A pyromechanical securing element for mechanical connection of two components, said securing element comprising:
a generally cylindrical covering, including an expandable head part;
a pyrotechnic propellant charge disposed within said head part, which borders on an adapter; and
a stop disposed on a rear part of the covering distal said head part for registering with concentric through passages in adjacent first and second components to be interconnected, wherein the covering, at its head part, has frangible break notches running in longitudinal direction operable to tear open the covering in the head region upon ignition of the propellant charge to bend separated head part portions around the adapter, as a result of which the first component is firmly connected to the second component, wherein
the adapter defines a groove extending about the outer periphery thereof,
the covering defines at least three radially projecting collar portions arranged on the outer surface of the covering and radially projecting collar portions arranged on an inner surface of the covering projecting into the adapter groove to anchor the covering with the adapter, and
the radially projecting collar portions arranged on the outer surface are axially aligned and circumferentially alternating with the radially projecting collar portions arranged on the inner surface.
2. The securing element of claim 1 , wherein the groove extends circumferentially about the adapter and the collar extends circumferentially about the covering.
3. The securing element of claim 1 , wherein the covering has a square shape with beveled corners.
4. The securing element of claim 1 , wherein the covering is formed from metal.
5. The securing element of claim 1 , wherein the adapter is substantially cylindrical.
6. A pyromechanical securing element for mechanical interconnection of two components, said securing element comprising:
a generally cylindrical covering which is substantially closed at one end thereof to define an expandable head portion;
a generally cylindrical adapter disposed within said covering, said adapter defining first and second axially spaced large diameter portions and an intermediate reduced diameter portion; and
a pyrotechnic propellant charge disposed in said head portion intermediate said closed end and said adapter,
wherein said covering defines radially projecting collar portions arranged on the outer surface of the covering and radially projecting collar portions arranged on an inner surface of the covering projecting inwardly toward the reduced diameter portion of said adapter to effect fixed engagement therebetween, and
wherein said radially projecting collar portions arranged on the outer surface include a plurality of flat surfaces, and the radially projecting collar portions arranged on the outer surface are axially aligned and circumferentially alternating with the radially projecting collar portions on the inner surface.
7. The securing element according to claim 6 , further comprising notches formed in said head part to effect predetermined expansion thereof upon combustion of said propellant charge.
8. The securing element according to claim 6 , further comprising an axial spacing intermediate said adapter and said propellant charge.