[특허]Dynamic pressure gas bearing device

Dynamic pressure gas bearing device 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	G02B-026/10 F16C-017/10
출원번호	US-0008149 (1987-01-22)
우선권정보	JP-0016299 (1982-02-05); JP-0080213 (1982-05-14)
발명자 / 주소	Tanaka Katsuhiko (Yamato-shi JPX) Sato Takanobu (Odawara-shi JPX) Sakatani Ikunori (Fujisawa-shi JPX)
출원인 / 주소	Nippon Seiko Kabushiki Kaisha (Tokyo JPX 03)
인용정보	피인용 횟수 : 22 인용 특허 : 0

초록 ▼

Disclosed is a dynamic pressure gas bearing device in a rotational unit in which a rotational member put on a cantilevered fixed shaft is designed such that an operating gas generated by a dynamic pressure groove formed between the fixed shaft and the rotational member is directed into a pressure chamber between the fixed shaft and the rotational member and supports the rotational member in the thrust direction and that the pressure in the pressure chamber is adjusted by a hole formed in the fixed shaft or the rotational member.

대표청구항 ▼

A dynamic pressure assembly comprising as members within a closed housing: a body; a solid fixed shaft without a bore therethrough fixed to said body and having a free end; a rotational member including a sleeve portion surrounding said fixed shaft with a radial clearance and a bottom portion having an internal surface opposed to an end surface of the free end of the fixed shaft, the rotational member being shiftable relative to the fixed shaft; a pressure chamber formed between the internal surface of said bottom portion and the end surface of said free end; means for rotating said rotational member, said rotating means including a rotor fixed to said rotational member at an axial position thereof and a stator opposed to the rotor and fixed to said body; means for generating dynamic pressure in said radial clearance and supplying it to said pressure chamber through said radial clearance, the dynamic pressure generating means being formed between the shaft and the sleeve portion of the rotational member; and pressure regulating means including a restricted flow passage which has an opening in the center of said internal surface to vent a pressurized flow from the pressure chamber, thereby regulating dynamic pressure therein, the rim of said opening defining an annular seat for engagement by a portion of the end surface for closing the opening; the arrangement being such that said portion of the end surface of said shaft contacts said annular seat of the rotational member and closes the opening and thereby closes the passage when there is no relative rotation between the shaft and the sleeve or when such relative rotation is only at a low speed insufficient to develop in said pressure chamber a sufficiently high hydrodynamic pressure to axially displace the shaft relative to said housing by the hydrodynamic pressure established in said pressure chamber and opens the opening to said pressure chamber and thereby opens the passage when the rotation of the rotational member is at a high speed sufficient to develop a sufficiently high hydrodynamic pressure in said pressure chamber.

이 특허를 인용한 특허 (22)

Fukita Taku,JPX, Deflecting scanning apparatus.
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Takeuchi, Hisao; Murabe, Kaoru; Otsuki, Makoto, Dynamic pressure bearing and spindle motor with the bearing.
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Tanaka Katsuhiko (Yamato JPX) Sakatani Ikunori (Fujisawa JPX) Yoshiba Takeyuki (Fujisawa JPX) Sato Takanobu (Odawara JPX) Haginuma Kiyoshi (Fujisawa JPX) Takajou Toshimi (Fujisawa JPX) Sugi Hiromi (A, Dynamic pressure type fluid bearing device.
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Chen, Shixin; Zhang, Qide, Electric spindle motor with magnetic bearing and hydrodynamic bearing.
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Hijiya Toshinori,JPX ; Shingai Hiroyuki,JPX, Fluid bearing.
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Eum Jae-yong,KRX ; Lee Chang-woo,KRX, Fluid bearing apparatus.
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Tornquist, Gerald E.; McDowall, Gregor, Generator with hydraulically mounted stator rotor.
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Cheever Charles J. ; Gray Frank Alton ; Hazelton Mark ; van Witzenburg Johannes, Groove forming processes for shaft outer diameter.
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Huang, Ching-Hsing; Hsu, Hung-Kuang, Hydrodynamic and hydrostatic hybrid bearing and its manufacturing method.
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Ichiyama Yoshikazu,JPX, Hydrodynamic bearing.
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Lee,Kun Ta, Message device.
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Genovese Frank Cono, Method and apparatus for controlling the modulation of light beams in a rotating polygon type image forming apparatus.
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Konno Katsushige,JPX ; Hayashizaki Shinichi,JPX, Motor having dynamic pressure bearing, and rotator device having the motor as driving source.
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Kanai, Takashi; Matsushita, Hiroki, Motor, and motor control system.
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Sweeney Michael N. (Lake Orion MI) Tiffany Brian L. (Rochester Hills MI) Vettese Thomas J. (West Bloomfield MI) Maiberger Mark S. (New Baltimore MI) Rodgers John M. (Pasadena CA), Optical scanning device having a spherical exit window.
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Sarraf Sanwal P. (Rochester NY), Rotary device.
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Osada Noriyuki (Tokyo JPX) Hisabe Yasushi (Kanagawa JPX) Ohtani Toshihiro (Kanagawa JPX) Kanamori Toshiya (Kanagawa JPX), Rotation supporting device of a polygon mirror.
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Asada Takafumi (Hirakata JPX), Self acting gas bearing apparatus.
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Chen Lee-Long,TWX, Sleeve bearing structure.
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Takehara Isamu,JPX ; Shimaguchi Hirotada,JPX ; Ogawa Masashi,JPX, Spindle motor.
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Iwaki Tadao,JPX ; Komata Kimio,JPX, Spindle motor having air dynamic pressure bearing and rotating device having the spindle motor as driving source.
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Domberg Daniel ; Katsumata Shin, Stress relief in a magnetic thrust bearing.
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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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Dynamic pressure gas bearing device 원문보기

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Dynamic pressure gas bearing device 원문보기

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이 특허를 인용한 특허 (22)

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