JOINT FOR MOUNTING COMPONENTS ON A ROCKET
A joint for mounting a component on a rocket, such as mounting a valve to a rocket body. The joint comprises a coiled roll pin and a shaft. The coiled roll pin comprises a rolled sheet defining an internal channel. The shaft extends through the internal channel and extends out both ends of the coiled roll pin. At each end of the shaft is disposed one or more compressible disc springs. Retaining rings or flat washers may compress the disc springs for axial restraint. The ends of the shaft may include a cover with an outer diameter larger than a joint hole. The joint compensates for vibrational loads, for example due to launch, and for dimensional changes, for example due to temperature gradients between two parts being connected by the joint. Some embodiments include no shaft, with the coiled roll pin axially secured by a cover or cover plate.
1 . A joint for mounting a component to a bracket on a rocket body, the joint comprising:
a coiled roll pin comprising a sheet rolled together to axially define a channel and extending axially from a first end to a second end through aligned holes in the joint;
a first cover plate disposed at the first end and configured to limit an axially outward movement of the coiled roll pin at the first end; and
a second cover plate disposed at the second end and configured to limit an axially outward movement of the coiled roll pin at the second end.
2 . The joint of claim 1 , further comprising one or more retaining rings configured to limit axial movement of the first or second cover plates.
3 . The joint of claim 1 , wherein the first cover plate or the second cover plate is threaded into a cavity formed in the joint.
4 . The joint of claim 1 , further comprising one or more covers configured to limit axial movement of the first or second cover plates.
5 . The joint of claim 4 , further comprising one or more set screws securing the one or more covers to the joint.
6 . The joint of claim 1 , wherein the joint does not include a shaft extending through the channel of the coiled roll pin.