Siemens Aktiengesellschaft

Johann Biermeier

Otto Olbrich

Albert Dierkes

Wilhelm Brand

Heinz Obermayer

A magnetic disk memory has a disk pack with a revolving spindle, the disk pack being seated at both sides in a housing and being driven by a drive motor within the hub. The spindle is seated at mutually opposite walls of a supporting shell of the housing with a pair of ball bearings which are tensioned in the axial direction. To this end, each ball bearing is fixed with an interference fit on a respective axial peg of the spindle and is likewise disposed with interference fit in a respective bearing bushing. One of the bearing bushings is inserted into and fixed in a slot let into one wall of a supporting shell of the housing. Assigned to the other bearing bushing is a resilient wall section in the other wall of the supporting shell at which the second bearing bushing is fixed pressing inwardly against the spring power of this wall region.

Hermetically sealed, two-sided bearing structure for a magnetic disk

A magnetic disk memory comprises a hub rotatably seated at both ends in a one-piece supporting shell of a housing and carrying at least one storage disk and driven by an internal drive motor. The hub is fixed on a rotating spindle, whereby a pair of ball bearings is provided for seating the spindle at mutually opposite walls of the supporting shell. The ball bearings are embraced in the axial direction in order to achieve a play-free spindle guidance. Each ball bearing has an inner ring fixed with an interference fit onto a respective end of the spindle and a respective bearing bushing likewise seated with an interference fit on its outer ring. One of the two bearing bushings is rigidly disposed in the allocated wall of the supporting shell and, in the incorporated condition of the hub, the other bearing bushing is fixed at the opposite wall of the supporting shell and is prestressed in the axial direction.

Magnetic disk memory comprising a membrane spring-braced bearing of a

A housing for a magnetic disk memory comprising a disk pack rotatably seated at both sides and a rotational positioner is subdivided along a parting plane parallel to the axes of the disk pack and the rotational positioner, being subdivided into a tub-shaped supporting shell and into a cover. Both bearing locations for the disk pack lie just within the edge of the supporting shell and the immersion depth of the rotational positioner into the supporting shell is as small as possible. As a base, the supporting shell comprises an end wall inclined at a predetermined angle relative to the parting plane, the inside of the end wall, however, comprising an attachment surface aligned parallel with the parting plane in the attachment region of the rotational positioner. Outwardly directed webs are provided on the outer surface of the end wall and extend at right angles with respect to one another for the purpose of reinforcement.

Housing for a magnetic disk memory having a disk pack seat at opposite

A magnetic disk memory has a disk pack with a revolving spindle, the disk pack being seated at both sides in a housing and being driven by a drive motor arranged within the hub. The spindle is seated at mutually opposite walls of a supporting shell of the housing with a pair of ball bearings which are tensioned in the axial direction. To this end, each ball bearing is fixed with an interference fit on a respective axial peg of the spindle and is likewise disposed with interference fit in a respective bearing bushing. One of the bearing bushings is inserted into and fixed in a slot let into one wall of a supporting shell of the housing. Assigned to the other bearing bushing is a resilient wall section in the other wall of the supporting shell at which section the second bearing bushing is fixed pressing inwardly against the spring power of this wall region.

Magnetic disk memory having a disk pack seated at both sides in

A housing for a magnetic disk memory comprises a support shell and a cover for housing a magnetic disk pack and a rotational positioner. The disk pack is provided with two bearing locations one of which is secured to one lateral wall of the support shell and the other of which is defined by a slot open toward the edge of the supporting shell in an opposite lateral wall for receiving a disk pack bearing bushing. A seal is provided between the support shell and the cover for a dust-free seal of the interior of the housing, the seal being a closed sealing ring which is pinched at the parting plane between the support shell and the cover. The seal comprises a perpendicularly projecting semi-circular extension in the region of the slot--which encompasses the bearing bushing and is fixed to the exterior of the lateral wall in a recess formed therein.

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Munich, Germany

Johann Biermeier