Tooling mandrel for assembling a head stack assembly with a disk drive base
View Patent ↗A tooling mandrel for use in assembling a disk drive having a disk drive base and a head stack assembly with a pivot bearing cartridge. The cartridge includes a shaft and a sleeve. The shaft includes a shaft first end with an engagement feature. The shaft defines an axis of rotation and a shaft outer circumferential surface. The sleeve defines a sleeve inner circumferential surface disposed towards the shaft outer circumferential surface. The tooling mandrel includes a retainer element defining a longitudinal axis and including a distal end. The distal end engages the engagement feature. The tooling mandrel includes tooling fingers angularly fixed to the retainer element with respect to the longitudinal axis. The tooling fingers each include a tip portion. Each tip portion engages the pivot bearing cartridge through cooperative radial movement with respect to the axis of rotation with the distal end engaged with the engagement feature.
1. A tooling mandrel for use in assembling a disk drive, the disk drive including a disk drive base and a head stack assembly, the head stack assembly including a pivot bearing cartridge, the pivot bearing cartridge including a shaft and a sleeve disposed about the shaft, the shaft including a shaft first end with an engagement feature, the shaft defining an axis of rotation and a shaft outer circumferential surface, the sleeve defining a sleeve inner circumferential surface disposed towards the shaft outer circumferential surface, the tooling mandrel comprising:
a retainer element defining a longitudinal axis and including a distal end, the distal end being sized and configured to engage the engagement feature of the shaft first end with the longitudinal axis being aligned with the axis of rotation; and
at least two tooling fingers disposed about the retainer element, the tooling fingers being angularly fixed to the retainer element with respect to the longitudinal axis, the tooling fingers each include a tip portion, each tip portion including a distal-most surface disposed parallel to the longitudinal axis, each distal-most surface of each tip portion being sized and configured to engage the pivot bearing cartridge through cooperative radial movement with respect to the axis of rotation with the distal end of the retainer element being engaged with the engagement feature of the shaft first end.
2. The tooling mandrel of claim 1 wherein the at least two tooling fingers include three tooling fingers.
3. The tooling mandrel of claim 1 wherein each tip portion is sized and configured to engage the pivot bearing cartridge through engagement of the sleeve inner circumferential surface through cooperative radial movement away from the axis of rotation with the distal end of the retainer element being engaged with the engagement feature of the shaft first end.
4. The tooling mandrel of claim 1 wherein each tip portion is sized and configured to engage the pivot bearing cartridge through engagement of the shaft outer circumferential surface through cooperative radial movement towards the axis of rotation with the distal end of the retainer element being engaged with the engagement feature of the shaft first end.
5. The tooling mandrel of claim 1 wherein the engagement feature is a slot and the distal end of the retainer element is flat-head screwdriver shaped.
6. The tooling mandrel of claim 1 wherein the tooling fingers are movable along the retainer element with respect to the longitudinal axis of the retainer element.
7. The tooling mandrel of claim 1 further includes a biasing element in mechanical communication with the retainer element for biasing the retainer element in a direction along the longitudinal axis towards the distal end.
8. The tooling mandrel of claim 7 wherein the biasing element is a spring.
9. The tooling mandrel of claim 1 wherein each distal-most surface of each distal portion is facing towards the longitudinal axis.
10. The tooling mandrel of claim 1 wherein each distal-most surface of each distal portion is facing away from the longitudinal axis.