 Electric motor and motor control system |
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| Electronically commutated motor |
| The electronically commutated motor 110 according to FIG. 1 has two stator winding phases 112, 114 ... |
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| Brushless motor control device and equipment using the control device |
| A feature of the present invention for achieving the objects described above is characterized in ... |
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| Turbopump with actine suspension for a propulsion system |
| It is the object of the present invention to overcome the aforesaid drawbacks and to propose a ... |
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| Magnetic bearing apparatus |
| An object of the present invention is to provide a magnetic bearing apparatus capable of preventing ... |
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| Ceiling fan |
| OF A PREFERRED EMBODIMENT OF THE INVENTION The fan of the invention includes a canopy 10 by which ... |
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| Waterproof overhead fan |
| As shown in FIGS. 1 and 3, an overhead suspended fan in accordance with the invention includes an ... |
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| Spiral fluted wheel for a water pump |
| The main objective of the invention is to provide a spiral fluted wheel for a pump that can be ... |
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| Insulation element and method for introducing winding elements into grooves on an armature |
| Because the insulator element of the invention has at least one plastic element that is intended ... |
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| Electromagnetic vibrator and portable device employing the same |
| The present invention addresses the problems discussed above and aims to contribute to realizing ... |
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Disk driving apparatus using dynamic pressure-type bearing device
| Details |
Inventors: Teshima, Hiroyoshi;
Assignee: Matsushita Electric Industrial Co., Ltd. (Osaka-fu, JP)
Primary Examiner: Klimowicz; William
Assistant Examiner:
Attorney, Agent or Firm: Wenderoth, Lind & Ponack, L.L.P.
A disk driving apparatus using a dynamic pressure-type bearing device of an oil lubrication type, wherein the bearing device includes a housing main body, a sleeve part fixed to the housing main body, a rotor part relatively rotatable to the housing main body, a shaft having a spherical front end clamped to the rotor part, a bottom plate at an end face of the shaft and a thrust member interposed between the shaft and the bottom plate has a dynamic pressure radial bearing constructed by the shaft and the sleeve part and having herringbone grooves formed at either of the shaft and sleeve part, the thrust member being formed of a high polymer, and a thrust pivot bearing constructed by the thrust member set at the bottom plate secured to one side of the sleeve part and one end of the shaft. |
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DETAILED DESCRIPTION The object of the present invention is therefore to provide a disk driving apparatus using a dynamic pressure-type bearing device capable of preventing the generation of metallic abrasion particles of a thrust plate and a shaft.
In accomplishing these and other objects, according to a first aspect of the present invention, there is provided a disk driving apparatus using a dynamic pressure-type bearing device of an oil lubrication type.
The bearing device comprises a housing main body, a sleeve part fixed to the housing main body, a rotor part relatively rotatable to the housing main body, a shaft having a spherical front end clamped to the rotor part, a bottom plate at an end face of the shaft, and a thrust member interposed between the shaft and the bottom plate.
A dynamic pressure radial bearing is constructed by the shaft and the sleeve part, having herringbone grooves formed at either of the shaft and sleeve part, and the thrust member is formed of a high polymer.
A thrust pivot bearing constructed by the thrust member is set at the bottom plate secured to one side of the sleeve part and one end of the shaft.
According to a second aspect of the present invention, there is provided a disk driving apparatus using a dynamic pressure-type bearing device of an oil lubrication type.
The bearing device comprises a housing main body, a rotor part relatively rotatable to the housing main body, a sleeve part fixed to the rotor part, a shaft having a spherical front end clamped and secured to the housing main body, and an upper plate at an end face of the shaft.
A thrust member interposed between the shaft and upper plate.
A dynamic pressure radial bearing is constructed by the shaft and the sleeve part with herringbone grooves formed at either of the shaft and the sleeve part.
The thrust member is formed of a high polymer.
A thrust pivot bearing is constructed by the thrust member set at the upper plate and is secured to one side of the sleeve part and one end of the shaft
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Generators or Motors 
