JBT 8925-1999 汽车万向节十字轴总成 技术条件

ICS21.100.20J11JB/T8925－1999汽车万向节十字轴总成技术条件SpecificationsofautomobileU–jointcrossassembly1999-06-28发布2000-01-01实施国家机械工业局发布I前言1范围····················································································································································································································12引用标准·········································································································································································································13定义和符号····································································································································································································14总成代号·········································································································································································································35技术要求·········································································································································································································66试验方法·········································································································································································································87检验规则·········································································································································································································88标志····················································································································································································································99包装、运输和贮存··················································································································································································10附录A（标准的附录）总成性能试验方法···································································································································11附录B（标准的附录）十字轴位置度检测方法·························································································································15JB/T8925－1999目次II前言本标准为首次制定。本标准的附录A、附录B都是标准的附录。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：万向钱潮股份有限公司。本标准主要起草人：徐铭、刘燕云、高天安、孟琼华。JB/T8925－199911范围本标准规定了汽车传动轴万向节十字轴总成（以下简称总成）的代号、技术要求、试验方法、检验规则、标志、包装、运输和贮存，供生产检验和用户验收。本标准适用于中、轻型载重汽车、客车和轿车传动轴的万向节十字轴总成。重型载重汽车、工程机械及汽车转向节上的万向节十字轴总成可参照使用。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。JB/T7940.1—1995直通式压注油杯JB/T7940.2—1995接头式压注油杯JB/T7940.7—1995油杯技术条件GB/T1184—1996形状和位置公差未注公差值GB/T1801—1979公差与配合尺寸至500mm孔、轴公差带与配合GB/T1958—1980形状和位置公差检测规定GB/T3077—1988合金结构钢技术条件GB/T4199—1984滚动轴承公差定义GB/T5671—1995汽车通用锂基润滑脂GB/T6930—1986滚动轴承词汇GB/T8597—1988滚动轴承包装GB/T9450—1988钢件渗碳淬火有效硬化层深度的测定和校核JB/T1255—1991高碳铬轴承钢滚动轴承零件热处理技术条件JB/T3232—1994万向节滚针轴承JB/T6639—1993深沟球轴承用骨架式橡胶密封圈技术条件JB/T7361—1994滚动轴承零件硬度试验方法JB/T8921—1999滚动轴承及其商品零件检验规则3定义和符号定义和符号见图1和图2。3.1定义本标准采用下列定义。有关轴承的定义按GB/T6930的规定。国家机械工业局1999-06-28批准中华人民共和国机械行业标准汽车万向节十字轴总成技术条件SpecificationsofautomobileU–jointcrossassemblyJB/T8925－19992000-01-01实施JB/T8925－19992图1总成示意图图2十字轴形位公差示意图JB/T8925－199933.1.1万向节在两轴夹角不变或改变时，能够将扭矩和旋转运动从一根轴传到另一根轴的关节式的机械装置。3.1.2汽车万向节十字轴总成汽车传动轴用装有轴承的十字轴。3.1.3十字轴在同一平面内具有四个径向均布轴颈的中间传动元件。3.1.4静扭强度安全系数静扭强度试验中总成到屈服点时的扭矩与额定扭矩的比值。3.1.5扭转疲劳寿命总成在规定的交变扭矩作用下到某个总成零件损坏时的循环次数。3.1.6磨损寿命对总成施加额定扭矩进行连续运转直到总成温度上升到60℃时的运转时间。3.2符号除下列符号外，本标准所引用的符号，其定义规定在GB/T4199中。L：总成装配长度l：十字轴端面距dc：十字轴轴颈公称直径ns：静扭强度安全系数4总成代号4.1代号方法总成代号由结构类型代号、配合安装特性尺寸代号和后置代号组成。4.1.1结构类型代号结构类型代号用“U”（U为Universaljoint的第一位字母）加一或两位大写的汉语拼音字母表示。总成结构图见图3。UN内卡型万向节十字轴总成UW外卡型万向节十字轴总成UY翼型万向节十字轴总成UG点焊盖板型万向节十字轴总成UT条形背板型万向节十字轴总成UA圆形背板型万向节十字轴总成UZ外圈自定位型万向节十字轴总成UJ钢板冲压轴承型万向节十字轴总成UGW两点焊盖板两外卡型万向节十字轴总成UYW两翼两外卡型万向节十字轴总成UYN两翼两内卡型万向节十字轴总成UYG两翼两点焊盖板型万向节十字轴总成UNW两内卡两外卡型万向节十字轴总成JB/T8925－19994a）内卡型b）外卡型c）翼型d）点焊盖板型e）条形背板型f）圆形背板型图3总成结构类型示意图JB/T8925－19995g）外圈自定位型h）钢板冲压轴承型i）两点焊盖板两外卡型j）两内卡两外卡型k）两翼两外卡型l）两翼两内卡型m）两翼两点焊盖板型图3（完）JB/T8925－199964.1.2配合安装特性尺寸代号配合安装特性尺寸代号由五位阿拉伯数字表示，前两位数字表示总成轴承外径D（翼型万向节十字轴总成为翼形轴承座装配孔间距）的毫米数，后三位数字表示总成装配长度L（翼型万向节十字轴总成为装配圆弧直径）的毫米数，所有尺寸数字须按数字修约规则圆整。当万向节十字轴总成两对称轴头尺寸或轴承类型不一时，取其中较大的一组尺寸数字作为配合安装特性尺寸代号。4.1.3后置代号后置代号由拉丁字母表示，见表1。表1后置代号含义后置代号含义P油杯在万向节十字轴中部Q油杯在万向节十字轴侧部R油杯在轴承底部N无油杯L万向节十字轴总成两对称轴头尺寸不一A；B；C内部结构差异Y1；Y2；Y3外部尺寸、结构差异4.2代号示例UN30055P4.3标记示例万向节十字轴总成的标记为：UN30055PJB/T8925—19995技术要求5.1总成5.1.1总成应符合本标准的要求，并按经规定程序批准的图样及技术文件制造。5.1.2静扭强度安全系数ns必须大于2.5。5.1.3扭转疲劳寿命：循环次数不得低于2×105。5.1.4磨损寿命不得低于60h。5.1.5装配长度公差带不得超出GB/T1801规定的h11。5.1.6总成滚针轴承径向游隙按表2的规定。油杯在万向节十字轴中部总成装配长度总成轴承外径内卡型万向节十字轴总成JB/T8925－19997表2总成滚针轴承径向游隙μm十字轴轴径dcmm~18＞18~30＞30总成滚针轴承径向游隙20~6025~7030~805.1.7总成装配后轴承应转动灵活。5.1.8客户要求时所带的卡簧、压板、螺栓等总成附件应齐全、完好。5.1.9外观质量应符合下述规定。总成零件工作表面不得有磕碰伤、划痕、黑斑等缺陷，并应清除毛刺、锐边；非加工表面必须抛丸处理，显现金属本色。5.1.10总成装配后加注符合GB/T5671规定的2号汽车通用锂基润滑脂。5.2十字轴5.2.1材料及热处理5.2.1.1材料采用符合GB/T3077规定的20CrMnTi、20Cr等合金结构钢。5.2.1.2十字轴必须采用渗碳淬火的热处理方法，轴颈渗碳淬火有效硬化层深度根据十字轴轴颈的尺寸按表3规定。表3轴颈渗碳淬火有效硬化层深度mm十字轴轴颈dcmm~18＞18~30＞30