Multiple hold-down and release device for spacecraft, and methods for releasing a spacecraft from a dispenser of a launcher and for installing a multiple hold-down and release device for spacecraft

A multiple hold down and separation device for spacecraft, comprising:

• a central structure comprising:
• a central section with an inner hole with a cylindrical surface comprising an end stop, an inner axial shaft provided into the inner hole, the central section comprising a release bolt aligned with the inner axial shaft, a main bushing at least partly arranged inside the inner hole and axially guided by means of a guiding system comprising a guiding bushing on the main bushing and a guiding bushing on the surface of the inner hole, the main bushing comprising a protrusion on an outer surface, and a retainer spring provided inside the main bushing, and
• at least two arms protruding from the central section axially preloaded by a pusher at an end opposite the central section,
• a support connected to the central section of the central structure and comprising an attachment device,
• an actuator connected to the release bolt of the central section of the central structure,
• at least two connecting levers, each one of the connecting levers connected to an end of a corresponding arm of the central structure by the pusher, and
• at least two hold-down assemblies placed on a periphery of the multiple hold down and separation device, each of the at least two hold-down assemblies comprising a hold-down support and a hold-down both of the hold-down and the hold-down support comprising conical mating surfaces, each hold-down support comprising a torsion spring around a torsion spring axis, each corresponding lever articulated with a corresponding hold-down support through a corresponding torsion spring axis.