Driving mechanism for magnetic hard disc

Claim 2

A driving mechanism for magnetic hard discs, comprising: means in said mechanism isolating a space for maximum cleanness; a driving motor mounted within said apparatus and having a stator and a rotor, said motor when energized having parts producing magnetic flux; a rotor shaft mounting said rotor, said shaft being mounted in a bearing system; a hub extending into the space of maximum cleanness for receiving therein at least one magnetic hard memory disc; means between said motor and said hub for driving said hub; means forming a magnetic flux shield and located between the parts producing the magnetic flux and the space of maximum cleanness for receiving the hard memory disc; and means detachably connecting the rotor and at least parts of the stator to the rotor shaft independently of any connection between said shaft and said hub.

Claim 3

A driving mechanism for magnetic hard discs, comprising: means in said mechanism isolating a space for maximum cleanness; a multi-phase brushless direct current driving motor having self contained drive electronics including output stage transistors and a control circuit and mounted within said mechanism and having a rotor and a stator with a stack of laminations, said motor when energized having parts producing magnetic flux, said rotor being a permanent magnet outer rotor having a circular rotor casing and at least one permanent magnet housed in the rotor casing, the rotor casing being connected to a rotor shaft concentric thereto in the motor; a hub extending into the space of maximum cleanness for receiving therein at least one magnetic hard memory disc; means between said motor and said hub for driving said hub; means forming a magnetic flux shield and located between the parts producing the magnetic flux and the space of maximum cleanness; and a circuit carrier provided for the drive electronics and control circuit whose output stage transistors are thermally connected to cooling plates electrically separate from one another, the cooling plates being fitted to a stator winding core and in turn supporting the circuit carrier.

Claim 4

A driving mechanism for magnetic hard discs, comprising: means in said mechanism isolating a space for maximum cleanness; a multi-phase brushless direct current driving motor having self contained drive electronics including output stage transistors and a control circuit and mounted within said mechanism and having a rotor and a stator with a stack of laminations, said motor when energized having parts producing magnetic flux, said rotor being a permanent magnet outer rotor having a circular rotor casing and at least one permanent magnet housed in the rotor casing, the rotor casing being connected to a rotor shaft concentric thereto in the motor; a hub extending into the space of maximum cleanness for receiving therein at least one magnetic hard memory disc; means between said motor and said hub for driving said hub; means forming a magnetic flux shield and located between the parts producing the magnetic flux and the space of maximum cleanness; and a circuit carrier provided for the drive electronics and control circuit whose output stage transistors are thermally connected to cooling plates electrically separate from one another, the cooling plates being fitted to a stator winding core and in turn supporting the circuit carrier.

Claim 5

A driving mechanism according to claim 2, wherein the cooling plates are fitted to the stator winding core by means of snap connections.

Claim 6

A driving mechanism according to claim 3, wherein legs are stamped and bent from the cooling plates for supporting the circuit carrier, said legs also being inserted and soldered in recesses of the circuit carrier.

Claim 7

A driving mechanism according to claim 3, wherein the snap connections are detachably constructed.

Claim 8

A driving mechanism according to claim 3 or 5, wherein the circuit carrier carries one or more position rotation detectors and the snap connections are randomly engaged in one of at least two differently reciprocal angular alignment positions between the stator winding core and the circuit carrier supported on the cooling plates.

Claim 9

A driving mechanism according to claim 6, wherein the position rotation detector or detectors are inserted through guidance openings in the cooling plate.

Claim 10

A driving mechanism according to claim 7, wherein the rotation position detector or detectors are fixed with respect to the guidance openings and are preferably press fitted in the said guidance openings.

Claim 11

A driving mechanism according to claim 2, wherein supports projecting from one end face of the winding core are provided for connecting the stator winding core to the cooling plates and said supports engage in recesses provided in the cooling plates.

Claim 12

A driving mechanism according to claim 9, wherein the supports are shaped onto a stator end plate.

Claim 13

A driving mechanism for magnetic hard discs, comprising: means in said mechanism isolating a space for maximum cleanness; a brushless direct current driving motor operated from externally located drive electronics and mounted within said mechanism and having a rotor and a stator with a stack of laminations, said motor when energized having parts producing magnetic flux, said rotor being a permanent magnet outer rotor having a circular rotor casing and at least one permanent magnet housed in the rotor casing, the rotor casing being connected to a rotor shaft concentric thereto in the motor; a hub extending into the space of maximum cleanness for receiving therein at least one magnetic hard memory disc; means between said motor and said hub for driving said hub; means forming a magnetic flux shield and located between the parts producing the magnetic flux and the space of maximum cleanness; and a carrier plate for at least one rotation position detector being provided on the stator winding core by means of supports in alternatively one of at least two different reciprocal angular alignment positions between the winding core and the carrier plate.

Claim 14

A driving mechanism for magnetic hard discs, comprising: means in said mechanism isolating a space for maximum cleanness; a brushless direct current driving motor operated from externally located drive electronics and mounted within said mechanism and having a rotor and a stator with a stack of laminations, said motor when energized having parts producing magnetic flux, said rotor being a permanent magnet outer rotor having a circular rotor casing and at least one permanent magnet housed in the rotor casing, the rotor casing being connected to a rotor shaft concentric thereto in the motor; a hub extending into the space of maximum cleanness for receiving therein at least one magnetic hard memory disc; means between said motor and said hub for driving said hub; means forming a magnetic flux shield and located between the parts producing the magnetic flux and the space of maximum cleanness; and a carrier plate for at least one rotation position detector being provided on the stator winding core by means of supports in alternatively one of at least two different reciprocal angular alignment positions between the winding core and the carrier plate.

Claim 15

A driving mechanism according to claim 11, wherein the carrier plate is mounted to the stator winding core by means of snap connections.

Claim 16

A driving mechanism according to claim 12, wherein the snap connections are detachably constructed.

Claim 17

A driving mechanism for magnetic hard discs, comprising: means in said mechanism isolating a space for maximum cleanness; a brushless direct current driving motor mounted within said mechanism and having a rotor and a stator with a stack of laminations, said motor when energized having parts producing magnetic flux, said rotor being a permanent magnet outer rotor having a circular rotor casing and at least one permanent magnet housed in the rotor casing, the rotor casing being connected to a rotor shaft concentric thereto in the motor, the rotor shaft being mounted in a bearing tube concentric therewith, said bearing tube being connected to a motor assembly flange; a hub extending into the space of maximum cleanness for receiving therein at least one magnetic hard memory disc; means between said motor and said hub for driving said hub; means forming a magnetic flux shield and located between the parts producing the magnetic flux and the space of maximum cleanness, said shield being a substantially flat plate and fitted to the assembly flange; and a soft damping material located between the stator laminations and that part of the bearing tube carrying the stator laminations.

Claim 18

A driving mechanism for magnetic hard discs, comprising: means in said mechanism isolating a space for maximum cleanness; a brushless direct current driving motor mounted within said mechanism and having a rotor and a stator with a stack of laminations, said motor when energized having parts producing magnetic flux, said rotor being a permanent magnet outer rotor having a circular rotor casing and at least one permanent magnet housed in the rotor casing, the rotor casing being connected to a rotor shaft concentric thereto in the motor, the rotor shaft being mounted in a bearing tube concentric therewith, said bearing tube being connected to a motor assembly flange; a hub extending into the space of maximum cleanness for receiving therein at least one magnetic hard memory disc; means between said motor and said hub for driving said hub; means forming a magnetic flux shield and located between the parts producing the magnetic flux and the space of maximum cleanness, said shield being a substantially flat plate and fitted to the assembly flange; and a soft damping material located between the stator laminations and that part of the bearing tube carrying the stator laminations.