Tape drive with integrated reel hub and motor shaft assembly

Patent metadata

Field	Value
Publication number	US-9824715-B2
Application number	US-201514739139-A
Country	US
Kind code	B2
Filing date	Jun 15, 2015
Priority date	Mar 20, 2012
Publication date	Nov 21, 2017
Grant date	Nov 21, 2017

Abstract

An integrated reel hub and motor shaft assembly for a tape drive that limits axial and radial run-out of tape (e.g., magnetic, optical) relative to a read/write head assembly and the various errors (e.g., loading, tension, reading, writing, and the like) associated therewith. In one arrangement, a reel hub of a reel assembly is directly molded (e.g., via an injection molding process) onto and around an end of a drive or motor shaft of a drive assembly. As a result, a more consistent head to tape interface, greater tape tracking performance, increased track density, and the like may be achieved.

First claim

What is claimed is:

1. A tape drive, comprising:
a housing;
a motor that comprises:
a stator non-rotatably secured to the housing; and
a rotor rotatably interconnected to the stator;

a motor shaft non-rotatably secured to the rotor; and
a reel hub that is adapted to receive a tape pack thereon, wherein the reel hub is molded directly onto an end of the motor shaft, wherein the reel hub includes:
a central portion having an inner surface that is molded directly onto the end and at least a portion of an outer circumferential surface of the motor shaft, wherein the inner surface of the central portion of the reel hub that is in direct and rigid contact with the end of the motor shaft is disposed on a base wall of the central portion, and wherein the central portion of the reel hub includes a circumferential wall that is molded onto the portion of the outer circumferential surface of the motor shaft;
an outer circumferential wall having an outer surface about which the tape pack is configured to be received; and
a central wall interconnecting the circumferential wall of the central portion to the outer circumferential wall, wherein the circumferential wall of the central portion is disposed above and below the central wall, wherein passing a current through the stator generates a force that rotates the rotor, and wherein rotation of the rotor induces a corresponding rotation of the reel hub about a rotational axis via the motor shaft.

2. The tape drive of claim 1 , wherein the tape drive is free of fasteners securing the reel hub to the rotor.

3. The tape drive of claim 1 , wherein the tape drive is free of gaps between the reel hub and the end of the motor shaft.

4. The tape drive of claim 1 , further comprising:
a first flange member secured to a first side of the reel hub; and
a second flange member secured to a second opposed side of the reel hub, wherein the first flange member, second flange member and reel hub collectively define a take-up reel that is adapted to accept the tape pack from a cartridge reel between the first and second flange members.

5. The tape drive of claim 1 , wherein the circumferential wall of the central portion is perpendicular to the base wall of the central portion.

6. The tape drive of claim 5 , wherein the tape drive is free of gaps between the base wall of the central portion and the end of the motor shaft.

7. The tape drive of claim 6 , wherein the tape drive is free of gaps between the circumferential wall of the central portion and the outer circumferential surface of the motor shaft.

8. The tape drive of claim 1 , wherein the central wall of the reel hub is perpendicular to the circumferential wall of the central portion and the outer circumferential surface of the reel hub.

9. The tape drive of claim 1 , wherein the central wall is perpendicular to the rotational axis of the reel hub.

Assignees

• Oracle Int Corp

Inventors

• Vanderheyden William

Classifications

• G11B15/32 Primary

  through the reels or cores on to which the record carrier is wound · CPC title

• G11B23/113

  Apparatus or processes specially adapted for the manufacture of magazines or cassettes {, e.g. initial loading into container (processes involving a single technical art and for which provision exists elsewhere, see the relevant class, e.g. B21, B29, B65)} · CPC title

• G11B23/037

  Single reels or spools · CPC title

• B29C45/14426

  Coating the end of wire-like or rod-like or cable-like or blade-like or belt-like articles · CPC title

• B29L2031/75

  Shafts · CPC title