Apparatus and method for transferring a torque from a rotating hub frame to a one-piece hub shaft
AssigneeTaiwan Semiconductor Manufacturing Company, Ltd.
InventorsYao Hsiang Liang, Wen-Ten Chan
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Abstract
An apparatus and a method for transferring a rotational torque from a hub frame to a one-piece hub shaft onto which a pad conditioning disc is attached are described. The apparatus is a one-piece hub shaft for mounting into a hub-frame. To provide a great improvement over the conventional design wherein a hub spacer is mounted to a hub shaft by screw means, the present invention conditioning head is assembled together by frictionally engaging a key and a flat surface on the hub shaft to a slot opening on the hub frame such that any catastrophic failure due to a screw breakage can be avoided. The present invention novel frictional engagement further provides a more uniform torque transfer between the two components.
Claims15
A method for transferring a torque from a hub frame to a one-piece hub shaft comprising the steps of:
- providing a hub frame of generally circular configuration having a center aperture therethrough adapted for receiving a one-piece hub shaft;
- providing a one-piece hub shaft of elongated shape having generally a circular cross-section and a disc integrally formed at a lower end, said one-piece hub shaft having a flat surface along a periphery and a full length of the shaft and a key integrally formed on said flat surface having at least two step heights;
- and
- inserting said one-piece hub shaft into said hub frame by engaging said flat surface and said key of the one-piece hub shaft to a recessed slot in said center aperture of the hub frame such that rotational torque of said hub frame is transferred to said hub shaft.
An apparatus for transferring a torque from a hub frame to a one-piece hub shaft comprising:
- a hub frame of generally circular configuration having a center aperture therethrough adapted for receiving a one-piece hub shaft;
- and
- a one-piece hub shaft of elongated shape having generally a circular cross-section and a disc integrally formed at a lower end, said one-piece hub shaft having a flat surface along a periphery and a full length of the shaft and a key integrally formed on said flat surface having at least two step heights such that said flat surface and said key intimately engage an opening in said hub frame for transferring a rotational torque from said hub frame to said hub shaft.
Dependencies are inferred from the claim text.