JPS58187613U - Dynamic pressure type fluid bearing - Google Patents

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

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

第１図は従来の動圧形流体軸受の断面図、第２図はこの
考案の一実施例を示す動圧形流体軸受の断面図、第３図
は第２図に示すスラスト受面の平面図、第４図および第
５図はこの考案の他の実施例を示す動圧形流体軸受の断
面図である。 図中、２１はハウジング、２２は軸受部材、２３は軸受
部材の底面、２４は支持部材、２７は円筒状孔、２８は
スラスト受面、２９はラジアル内面、３１は動圧発生用
みぞ、３２は凸状部、３３は動圧発生作用のみぞ、３４
は循環穴、３６は流通みぞ、３９は連通路、４１は円筒
状孔の開口部、４２は環状の接触面、５１は軸体、５２
はスラスト端面、５３はラジアル外面である。Fig. 1 is a sectional view of a conventional hydrodynamic bearing, Fig. 2 is a sectional view of a hydrodynamic bearing showing an embodiment of this invention, and Fig. 3 is a plane of the thrust bearing surface shown in Fig. 2. 4 and 5 are cross-sectional views of hydrodynamic bearings showing other embodiments of this invention. In the figure, 21 is a housing, 22 is a bearing member, 23 is a bottom surface of the bearing member, 24 is a support member, 27 is a cylindrical hole, 28 is a thrust bearing surface, 29 is a radial inner surface, 31 is a groove for generating dynamic pressure, 32 33 is a convex portion, 33 is a groove for generating dynamic pressure, 34
36 is a circulation hole, 39 is a communication path, 41 is an opening of a cylindrical hole, 42 is an annular contact surface, 51 is a shaft body, 52
is a thrust end face, and 53 is a radial outer surface.

Claims (1)

【実用新案登録請求の範囲】 １　ハウジング２１の内周面に合成樹脂製の軸受部材２
２を嵌合して配設し、該軸受部材の底面２３に当接して
配設した支持部材２４を７１ウジング２１に固定し、前
記軸受部材２２に設けた円筒状孔２７は平面状のスラス
ト受面２８と動圧発生用みぞ３１を有する円筒状のラジ
アル内面２９とを有し、前記スラスト受面２８は中央部
に設けた凸状部３２と凸状部３２の周囲に設けた動圧発
生作用のみぞ３３とを有し、前記凸状部３２に設けた循
環穴３４が軸受部材の底面２３に設けた流通みぞ３６お
よび軸受部材２２の外周面に設けた連通路３９を介して
円筒状孔の開口部４１と連通し、前記円筒状孔２７に配
設した軸体５１はスラスト受面２８に対向する平面状の
スラスト端面５２とラジアル内面２９に対向する円筒状
のラジアル外面５３とを有し、前記凸状部３２は軸受の
静止時にスラスト端面５２と接する環状の接触面４２を
循環穴３４の周囲に有する動圧形流体軸受。 ２　軸受部材２２がスリーブ１２２とスリーブ１２２の
一方の端部に当接するスラスト荷重受は部材２２２とか
ら構成される実用新案登録請求の範囲第１項記載の動圧
形流体軸受。 ３　スリーブ２２の一方の端部に設けたリップ３２２が
スラスト荷重受は部材２２２と接触する実用新案登録請
求の範囲第２項記載の動圧形流体軸受。 ４　スラスト荷重受は部材２２２に設けたリップがスリ
ーブ１２２の一方の端部に接触する実用新案登録請求の
範囲第２項記載の動圧形流体軸受。[Claims for Utility Model Registration] 1. Bearing member 2 made of synthetic resin on the inner peripheral surface of the housing 21
A supporting member 24, which is disposed in contact with the bottom surface 23 of the bearing member, is fixed to the 71 housing 21, and the cylindrical hole 27 provided in the bearing member 22 is formed into a planar thrust The thrust receiving surface 28 has a receiving surface 28 and a cylindrical radial inner surface 29 having a groove 31 for generating dynamic pressure. The circulation hole 34 provided in the convex portion 32 is connected to the cylindrical cylinder through a circulation groove 36 provided in the bottom surface 23 of the bearing member and a communication path 39 provided in the outer peripheral surface of the bearing member 22. The shaft body 51 , which communicates with the opening 41 of the shaped hole and is disposed in the cylindrical hole 27 , has a flat thrust end surface 52 facing the thrust receiving surface 28 and a cylindrical radial outer surface 53 facing the radial inner surface 29 . The convex portion 32 has an annular contact surface 42 around the circulation hole 34 that contacts the thrust end surface 52 when the bearing is at rest. 2. The hydrodynamic bearing according to claim 1, wherein the bearing member 22 is comprised of a sleeve 122 and a thrust load bearing member 222 that abuts one end of the sleeve 122. 3. The hydrodynamic bearing according to claim 2, wherein the lip 322 provided at one end of the sleeve 22 contacts the thrust load bearing member 222. 4. The hydrodynamic bearing according to claim 2, in which the thrust load receiver has a lip provided on the member 222 that contacts one end of the sleeve 122.