JPH0253515U - - Google Patents

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本考案の第一の実施例の縦断側面図、
第２図は第二の実施例の縦断側面図、第３図は第
三の実施例の縦断側面図、第４図は第四の実施例
の縦断側面図、第５図は従来例の縦断側面図、第
６図はすりこぎ現象の説明図である。 ６……軸孔、７，３３……回転部材、８……ハ
ウジング、９，３６，３７……貫通孔、１０……
底部、２１……凹凸、気流発生手段、２３，２８
，３５，４３……尖頭部、２４，２９，３８，４
２……固定軸、４４……凹凸。 FIG. 1 is a longitudinal sectional side view of the first embodiment of the present invention;
Fig. 2 is a vertical side view of the second embodiment, Fig. 3 is a longitudinal side view of the third embodiment, Fig. 4 is a longitudinal side view of the fourth embodiment, and Fig. 5 is a longitudinal cross-section of the conventional example. The side view, FIG. 6, is an explanatory diagram of the pestle phenomenon. 6... Shaft hole, 7, 33... Rotating member, 8... Housing, 9, 36, 37... Through hole, 10...
Bottom part, 21... unevenness, airflow generating means, 23, 28
, 35, 43... Pointed head, 24, 29, 38, 4
2...Fixed shaft, 44...Irregularities.

Claims (1)

【実用新案登録請求の範囲】 １ ハウジングに立設された固定軸の外周面と回
転部材に形成した前記固定軸が遊嵌される軸孔の
内周面との少なくとも一方に動圧流体ラジアル軸
受用の凹凸を形成し、前記回転部材の軸孔底部に
貫通孔を形成し、前記固定軸の先端に前記貫通孔
と対向する尖頭部を形成し、この尖頭部と前記貫
通孔との間隙に存する流体を前記貫通孔の軸芯と
略平行な方向に流動させる気流発生手段を設けた
ことを特徴とする動圧流体軸受装置。 ２ 尖頭部の少なくとも先端が貫通孔に遊嵌され
ていることを特徴とする請求項１記載の動圧流体
軸受装置。 ３ 貫通孔の尖頭部と対向する側を拡開したこと
を特徴とする請求項１又は２記載の動圧流体軸受
装置。 ４ 尖頭部と貫通孔との少なくとも一方に動圧発
生用の凹凸を形成したことを特徴とする請求項１
又は２又は３記載の動圧流体軸受装置。[Claims for Utility Model Registration] 1. A hydrodynamic radial bearing on at least one of the outer circumferential surface of a fixed shaft provided upright in the housing and the inner circumferential surface of a shaft hole formed in a rotating member into which the fixed shaft is loosely fitted. a through hole is formed at the bottom of the shaft hole of the rotary member, a pointed portion facing the through hole is formed at the tip of the fixed shaft, and a connection between the pointed portion and the through hole is formed. 1. A hydrodynamic bearing device comprising an airflow generating means for causing fluid existing in the gap to flow in a direction substantially parallel to the axis of the through hole. 2. The hydrodynamic bearing device according to claim 1, wherein at least a tip of the point is loosely fitted into the through hole. 3. The hydrodynamic bearing device according to claim 1 or 2, wherein the side of the through hole facing the pointed end is widened. 4. Claim 1, characterized in that at least one of the pointed head and the through hole is formed with unevenness for generating dynamic pressure.
Or the dynamic pressure fluid bearing device according to 2 or 3.