Stacked actuator arm assembly with registration washer
First Claim
1. A data storage device comprising:
- a storage medium; and
an actuator for accessing the storage medium, the actuator comprising;
a rotatable sleeve;
an actuator arm mounted to the sleeve;
a first spacer mounted to the sleeve and contacting the actuator arm;
a nut threaded on the sleeve to clamp the actuator arm and spacer together; and
a registration nut washer engaging the nut, the washer further comprising a protrusion which engages a portion of the spacer, such that as the nut tightens down on the stacked actuator arm assembly the nut washer does not rotate relative to the spacer.
1 Assignment
0 Petitions
Accused Products
Abstract
A stacked actuator arm assembly has an actuator arm and spacer stacked on a rotatable pivot bearing sleeve. The stacked actuator arm assembly has a nut washer on the pivot bearing sleeve where the nut washer has an extension to maintain its proper position. One spacer has an overmold, and the actuator arm is registered in rotational position to the overmold. A load beam for each actuator arm has its proximal end attached to the actuator arm and its distal end supporting a read/write head. A clamping nut is threaded on the sleeve to clamp the actuator arms and spacers together. A registration nut washer is registered in rotational position to the overmold so that, as the nut tightens down on the stacked actuator arm assembly, the nut washer does not rotate relative to the actuator arms and spacers. The registration nut washer has a key extension that engages a slot in the overmold to register the nut washer in rotational position to the overmold. Alternatively, the registration nut washer has an extension for a hole receiving a threaded pin to fasten the actuator assembly together, and this hole extension engages a registration surface on the overmold to register the nut washer in rotational position to the overmold.
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Citations
17 Claims
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1. A data storage device comprising:
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a storage medium; and
an actuator for accessing the storage medium, the actuator comprising;
a rotatable sleeve;
an actuator arm mounted to the sleeve;
a first spacer mounted to the sleeve and contacting the actuator arm;
a nut threaded on the sleeve to clamp the actuator arm and spacer together; and
a registration nut washer engaging the nut, the washer further comprising a protrusion which engages a portion of the spacer, such that as the nut tightens down on the stacked actuator arm assembly the nut washer does not rotate relative to the spacer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A disc drive comprising a plurality of rotatable discs and a stacked actuator assembly operable to move at least one read/write head over each recording surface of the rotatable discs, the actuator assembly comprising:
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a plurality of actuator arms, each arm carrying a read/write head;
a sleeve rotatable mounted on the disc drive and carrying the actuator arms in stacked array along the axis of the sleeve;
one or more spacers also mounted on the sleeve, a spacer being mounted between actuator arms carrying read/write heads for opposite sides of a rotatable disc so that the spacer provides separation between the arms to accommodate the rotatable disc positioned between the arms; and
at least one of the spacers having an overmold to provide a rotational registration surface for the actuator arms; and
a registration nut washer registered in rotational position to the overmold so that a clamping nut on the sleeve does not put a rotational load on the actuator arms relative to the overmold as the nut is tightened down on the actuator assembly. - View Dependent Claims (14, 15, 16, 17)
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Specification