Schwingungsdämpfung in einem montierbaren Behälter für Mehrplattenantrieb

摘要

A composite shelf in a shelf frame supports a plurality of disk drives and attenuates vibrations in the shelf. In the composite shelf, there is a double wall having an outer wall and an inner wall for supporting the disk drives mounted on the shelf. A stiffener between the inner wall and outer wall strengthens the composite shelf to reduce flexure in the composite shelf when the shelf is loaded by disk drives mounted on the shelf. A damping layer is placed between the stiffener and one of the inner wall or outer wall. This damping layer attenuates vibrations in the composite shelf so as to reduce vibrations transmitted from the composite shelf to the disk drives supported by the composite shelf. A second damping layer is placed between the stiffener and the other wall. Both damping layers attenuate vibrations in the composite shelf so as to reduce vibrations transmitted from the composite shelf to the disk drives supported by the composite shelf. A third damping layer may be placed within the stiffener. In one embodiment of the invention, the damping layers are adhesive damping layers. In another embodiment the damping layers are a damping layer sandwiched between two adhesive layers. Alternatively, the stiffener is a spacer member between the inner wall and the outer wall. The spacer member is a lanced tab lanced from one of the inner or outer walls and the tab is folded to have an arm adjacent to the other of the inner or outer walls. The spacer member may also be a hat shaped member attached to one of the inner or outer walls and having a surface adjacent to the other of the inner or outer walls. A shelf frame is constructed with a top composite shelf, a bottom composite shelf and two side walls connected between the top composite wall and the bottom composite. The top and bottom walls may have the same composite structure using a filler/stiffener. Alternatively, the bottom composite shelf has a filler/stiffener, and the top composite shelf has a spacer member.