5-滚动轴承.ppt

第5章 滚动轴承的公差与配合 Chapter 5 The tolerances and fits of antifriction bearings GB/T 4199-2003 《滚动轴承 公差 定义》 《Antifriction bearings tolerance definitions》 GB/T 6930-2002 《滚动轴承 词汇》 《 Antifriction bearings vocabularies》 GB/T 307.4-2005 《滚动轴承 推力轴承 公差》 《Antifriction bearings thrust bearings tolerance》 GB/T 307.1-2003 《滚动轴承 向心轴承 公差》 《 Antifriction bearings radial bearings tolerance》 滚动轴承的精度等级及应用 The accuracy classes and applications of antifriction bearings 滚动轴承与 轴和壳体孔的配合 The fits that antifriction bearings fit with shafts and shell holes 分类 Classify 安装形式 Installation form 滚动轴承的公差等级及应用 The tolerance grades and applications of antifriction bearings 滚动轴承的内、外径公差带的特点 The characteristics of antifriction bearings’ inradium and external diameter tolerance zone. ⑴ 滚动轴承的作用 The functions of antifriction bearings 支承旋转轴 Bear rotation axis 减少轴与支承部件之间的摩擦力 Reduce the friction force between shaft and supporting component 传动支承的标准部件 Standardized components which have the functions of transferring motions and bearing. 5.1 概述 Summary 5.1 概述 Summary ⑵ 特点 Features●滚动轴承是一种标准件Antifriction bearing is a kind of standard component ●有内外两种互换性 There are in and out two kinds of interchangeability●滚动轴承的精度要求很高 The required precisions of antifriction bearings are very high. 5.1 概述 Summary ⑶ 滚动轴承的结构 The structures of antifriction bearings 内圈 Inner ring 保持架Holder 滚动体Rolling element 外圈Outer ring 5.1 概述Summary ⑷ 安装形式 Installation forms 外圈与箱体上轴承座配合.内圈与旋转轴颈配合 Housing washer fits with the bearing block which is on the cabinet. Inner ring fits with the journal of the rotation axis. 通常为过渡配合 It usually to be transition fit 考虑到运动过程中轴会受热变形延伸，一端轴承应能够作轴向调节；调节好后应轴向锁紧。Considering that shaft will be heated so becoming deformed and extended in motor process.So one end bearing should be adjustable on axial direction.After being adjusted it should be locked on axial direction. 5.1 概述Summary 前置代号 Prefix code 基本代号