1、刚体的基本运动刚体的基本运动=+ABABrrr0ABr ABvv ABvv ABvv ABaa t4sin0tlls4 sin0tltsv4 cos4dd0t4sin0tltva4 sin16dd02tllva4cos16 22022ntlv4 cos40t4sin0tla4 sin1602tla4cos16 2202n 04ll20216tlv4 cos40t4sin0tla4 sin1602tla4cos16 2202n2 04ll0216l20216tlv4 cos40t4sin0tttddlim0 tttddlim0rrsvPrrvaPP ABPOr 2222nrrrrvaPPvPPa
2、nPaPa42 raP2narctanPPaarvP42 raP2arctan245.0tt 9.0,srad 8.112srad 8.1M 点的速度点的速度 sm 36.01rvM 2sm 36.0ra22nsm 648.0ra sm 741.022n2aaaM,556.0 tan229,srad 8.112srad 8.11sm 36.0MAvv2sm 36.0 aaA sm 36.01rvM2sm 36.0ra22nsm 648.0ra例例 题题 3 3例例 题题 3 3例例 题题 3 3例例 题题 3 3AC42 l22)()(nCCACaaaa22)()(nAAaa222)()(ll
3、例例 题题 3 3A ACCA内啮合内啮合两轮之间没有相对滑动两轮之间没有相对滑动定义齿轮传动比齿轮传动比EFFEEFrriEFvv EEFFrrEFFEEFrri齿轮传动的条件：齿轮传动的条件：齿距相等齿距相等zrt2齿距EFEFEFzzrriEEFFzrzr2 2外啮合外啮合DDCCDCrr vvCDCDDCCDzzrri转速转速n与与 的的关系：关系：成正比2121 602nnn121221212,1zzrrnni即：当：当：时时,为升速转动；为升速转动；时时,为降速转动。为降速转动。1|2,1i121|2,1i12轮系轮系:设有：设有：A，B，C，D，E 轮系，则总传动比为：轮系，则总传动比为：EDDCCBBAmEDDCCBBAmEAEAiiiii,)1()1(m 代表外啮合的个数代表外啮合的个数BAvv BBAArr皮带传动比皮带传动比ABBAABrritddkkkkrvsinrvRrvtddvaarttddddrr)(rnaat ddit ddkt ddjOxyzyxzO1i j k P1P2P3 P1P3P21Pv2Pv3Pvijk
