1范围
本标准规定了汽车用离合器分离轴承（以下简称轴承）及其单元的定义、分类、结构型式、外形尺寸、技术要求、检验规则和试验方法等。
本标准适用于轴承制造厂生产检验和用户验收。
2引用标准
下列标准所包含的条文，通过在本标准中引用而构成为本标准的条文。本标准出版时，所示版本均为有效。所有标准都会被修订，使用本标准的各方应探讨使用下列标准最新版本的可能性。
本标准主要起草人：宋丽、倪伯华、王秀荣、肖壮勇、李俭、马明君、孙文玲、徐浩。本标准于1991年6月首次发布，本次是第一次修订。
III
中华人民共和国机械行业标准
JB/T 5312－2001
汽车离合器分离轴承及其单元
C lutc h release bearings and units for automobiles代替JB/T 5312—1991
I
前言
本标准是对JB/T 5312—1991《汽车离合器用角接触球轴承》的修订。
本标准与JB/T 5312—1991相比，主要在以下方面进行了修改：
——增加了多种新结构离合器分离轴承及其单元；
——规定了离合器分离轴承及其单元的代号方法；
——修改并增加了技术要求的部分内容，相应修订了测量和检验方法；
——新增了检验规则；
3. 4自动调心离合器分离轴承单元se lf –aligning clutch release bearing unit
中国机械工业联合会2001-05-23批准
2001-10-01实施1
JB/T 5312－2001
具有自动调整离合器分离轴承与离合器盖总成同轴旋转性能的轴承单元。受推力压向离合器分离指（杆）实现离合器分离（切断动力）的轴承。受拉力拉动离合器分离指实现离合器分离的轴承。外圈端面与离合器分离指（杆）接触旋转的轴承。内圈端面与离合器分离指（杆）接触旋转的轴承。套在变速器轴承盖管状延伸部分的零件，对分离轴承的轴向移动起导向作用。使轴承旋转轴心对单元轴心产生相对径向位移的起始力。轴承在单元内从一个极限位置到另一个极限位置的径向移动量。模拟离合器分离轴承工况下台架试验，轴承所能达到规定的离合次数。单位为万次。套圈端面与分离指（杆）接触表面的中心圆直径。轴承单元与拨叉配合的工作面到单元接触圆的轴向距离。3. 5推式离合器用分离轴承push–style clutch release bearing unit 3. 6拉式离合器用分离轴承draw–style clutch rele ase bearing unit 3. 7外圈旋转式离合器分离轴承out ring rotating clutch release bearing 3. 8内圈旋转式离合器分离轴承inner ring rotating clutch release bearing 3. 9分离套筒relea se sleeve 3. 10调心力aligning f orce 3. 11调心量aligning displa ce ment 3. 12台架模拟寿命test rig simulate life 3. 13接触圆直径c onta ct circula r dia mete r 3. 14轴承单元配合宽度f ork to f ace width 4符号
GB/T 274—2000
GB/T 307.1—1994
GB/T 1995
GB/T 307.3—1996
GB/T 5671—1995
GB/T 8597—1988
JB/T 1255—2001
JB/T 3574—1997
JB/T 6641—1993
JB/T 7051—1993
JB/T 7361—1994
——规定了离合器分离轴承及其单元的台架模拟寿命、自调心离合器分离轴承的调心力和调心量的测试方法。
本标准的附录A、附录B和附录C都是标准的附录。
本标准的附录D是提示的附录。
本标准自实施之日起代替JB/T 5312—1991。
本标准由全国滚动轴承标准化技术委员会提出并归口。
本标准起草单位：洛阳轴承研究所、南京轴承厂、襄阳汽车轴承股份有限公司、牡丹江伯瑞克金属制品有限公司。
IC S 21. 100. 20
J11
JB/T 5312－2001
汽车离合器分离轴承及其单元
Clutch release bearings and units for automob iles
2001-05-23发布2001-10-01实施
中国机械工业联合会发布
目次
前言
1范围····················································································································································································································1 2引用标准·········································································································································································································1 3定义····················································································································································································································1 4符号····················································································································································································································2 5分类····················································································································································································································3 6代号方法·········································································································································································································3 7结构型式及外形尺寸···············································································································································································5 8技术要求·······································································································································································································13 9测量和检验方法························································································································································································14 10检验规则····································································································································································································14 11标志···············································································································································································································15 12包装、运输及贮存················································································································································································15附录A（标准的附录）台架模拟寿命试验··································································································································16附录B（标准的附录）调心量的测定·············································································································································18附录C（标准的附录）调心力的测定·············································································································································19附录D（提示的附录）新旧标准轴承型号对照·······················································································································20