JPH0158265U - - Google Patents

Description

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

第１図は本考案の一実施例としての小型モータ
を示す断面図、第２図は同じくその回転軸の上部
側部分の構成を示す拡大断面図、第３図と第４図
はそれぞれ本考案の他の実施例を示す小型モータ
の要部の拡大断面図、第５図と第６図はそれぞれ
従来例としての小型モータの断面図である。図に
おいて、１は回転軸、２は軸受ホルダ、３は焼結
含油軸受、４はステータコア、５はロータケース
、１０はＥリング、１１はスラストワツシヤ、１
２は小径部である。なお、図中同一符号は、同一
又は相当部分を示す。 Fig. 1 is a sectional view showing a small motor as an embodiment of the present invention, Fig. 2 is an enlarged sectional view showing the configuration of the upper part of the rotating shaft, and Figs. 3 and 4 are respectively the invention of the invention. FIGS. 5 and 6 are enlarged sectional views of main parts of a small motor showing another embodiment of the present invention, and FIGS. 5 and 6 are sectional views of a small motor as a conventional example, respectively. In the figure, 1 is a rotating shaft, 2 is a bearing holder, 3 is a sintered oil-impregnated bearing, 4 is a stator core, 5 is a rotor case, 10 is an E-ring, 11 is a thrust washer, 1
2 is a small diameter portion. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

【実用新案登録請求の範囲】 (1) 軸受ホルダの上下に装着された焼結含油軸
受によつて該軸受ホルダ内に両持ち支持された回
転軸、上記軸受ホルダに固定されたステータコア
、このステータコアの周側に対向して設けられ、
上記回転軸の一端側に中心部において固着された
有底容器状のロータケース、このロータケースの
底部に配設され、内周が上記ステータコアの外周
に対向する環状の駆動用磁石、上記回転軸の一部
に対し上記上側の焼結含油軸受の反ロータ側の端
面に対向するように固定された保持部材、この保
持部材と焼結含油軸受の上記反ロータ側の端面と
の間に摺動可能に介在された耐摩耗性材料よりな
るスラストワツシヤを備えるとともに、上記上側
の焼結含油軸受の反ロータ側の端面をそのボア部
側について上側に突出させ、その突出部の外側の
端面において上記スラストワツシヤを摺接させた
ことを特徴とする小型モータ。 (2) 焼結含油軸受の突出部が焼結含油軸受の端
面に一体に成形されていることを特徴とする実用
新案登録請求の範囲第１項記載の小型モータ。 (3) 焼結含油軸受の突出部が焼結含油軸受の端
面に接合された別部材で形成されていることを特
徴とする実用新案登録請求の範囲第１項記載の小
型モータ。[Scope of Claim for Utility Model Registration] (1) A rotating shaft supported on both sides within the bearing holder by sintered oil-impregnated bearings mounted above and below the bearing holder, a stator core fixed to the bearing holder, and this stator core. is provided facing the circumferential side of the
A bottomed container-shaped rotor case fixed at the center to one end of the rotating shaft; an annular driving magnet disposed at the bottom of the rotor case and having an inner circumference facing the outer circumference of the stator core; a holding member fixed to a portion of the upper sintered oil-impregnated bearing so as to face the end face on the anti-rotor side; and a holding member that slides between the holding member and the end face on the anti-rotor side of the sintered oil-impregnated bearing. A thrust washer made of a wear-resistant material is provided, and the end face of the upper sintered oil-impregnated bearing on the side opposite to the rotor protrudes upward on the bore side thereof, and the thrust washer is disposed on the outer end face of the protruding part. A small motor characterized by sliding contact. (2) The small motor according to claim 1, wherein the protrusion of the sintered oil-impregnated bearing is integrally formed on the end face of the sintered oil-impregnated bearing. (3) The small motor according to claim 1, wherein the protrusion of the sintered oil-impregnated bearing is formed of a separate member joined to the end face of the sintered oil-impregnated bearing.