第4章 齒輪機(jī)構(gòu)及其設(shè)計(jì)

1、概述齒廓嚙合基本定律及漸開(kāi)線齒形漸開(kāi)線圓柱齒輪各部分名稱和尺寸漸開(kāi)線直齒圓柱齒輪機(jī)構(gòu)的嚙合傳動(dòng)漸開(kāi)線斜齒圓柱齒輪傳動(dòng)空間齒輪傳動(dòng)定軸輪系傳動(dòng)比周軸輪系傳動(dòng)比復(fù)合輪系傳動(dòng)比其它類型齒輪傳動(dòng)簡(jiǎn)介POPOi122112 POPO2211 展角展角 usinurucosryucosurusinrxbbbbpzd zpd ibirrarccos rrarccosb cosrrb 2ms2me121212122112zzddddddibb)(2)(212121zzmdda中線中線2ms2mem)hz(hdd*aaa22 m)chz(hdd*aff222 一、漸開(kāi)線齒輪傳動(dòng)的特性一、漸開(kāi)線齒輪傳動(dòng)的特性1.

2、 傳動(dòng)比恒定不變傳動(dòng)比恒定不變常常數(shù)數(shù) POPOi122112 2. 漸開(kāi)線齒輪傳動(dòng)的嚙合線和漸開(kāi)線齒輪傳動(dòng)的嚙合線和 嚙合角嚙合角PNO11PNO2212122112bbrrPOPOi 3. 中心距變動(dòng)不影響傳動(dòng)比中心距變動(dòng)不影響傳動(dòng)比)zz(mrrm)ch(rmcmhrrcra*a*afa212121212 121212122112rrrrrrPOPOibb cosacos)rr(rrbb 2121 cosacos)rr(rrbb2121 cosacosa )zz(mrra12122 cosacosa 21NN21NN21BB B1B2 pb 121 pBB)tg(tgcosmz)tg(t

3、grPBaab 111112)tg(tgcosmz)tg(tgrPBaab 222222 )tg(tg)tg(tg21cos22112121 aabzzmPBPBpBB2121PBPBBB cossinh)tg(tgz*aa22111 a1=arccosrb1/ra1 2sin4cossin2*maxaahmmh 546.2,1,15982.1,1,20max*0max*0 aahh )tg(tg)tg(tg212211aazz PBPN1 cosmzcosrrb2 2020151510.810.817143024PBPN 1 sin2sin1mzrPN sin/*mhPBa 2*sin2ah

4、z 2*minsin2ahz 22sinhz*amin 2*minsin2ahz )(221zzmaa zmin = 2 2 h*a / sin2 N1Q ha*m -xmN1Q= PN1sin = rsin2 (m z sin2 )/2zmin = 2 2 h*a / sin2 minmin*)(zzzhxa 2sin2* zhxa mxxKJms tg2222mxxKJme tg2222 iirCCs )inv(inv2 iiiiirrrsrs)inv(invrsi 2)(rsBOCBOBi 22212211ssesesp inv)(tg2inv2121 zzxx 1221 coscosz

5、zy 1212121 coscos)zz(mcoscos)rr()rr(coscos)rr()rr()rr(aaym21212121 cosyzzzzcos22121 ymzzmymaa )(221aa mxxzzmmxxrrmxchmcmxhrrhrchrrcraaafafa)()(2)()()(212121212*1*21221121 mxhxmmhhaaa)(* mxchxmmcmhhaaf)(* ymm)xx(aam 21 m)xh(mxmmhh*a*aa y)xx( 21 aa m)ch(hhh*afa 2)0, 0; 0(2121 xxxxmin2min1zzzz minminhz

6、)zz(zxx*a212112 ;z)zz(hxminmin*a11 minmin*az)zz(hx22 min212zzz )xx;xx(21210 0 x2x1021 xx斜齒輪傳動(dòng)適合高速傳動(dòng)斜齒輪傳動(dòng)適合高速傳動(dòng)ld tgldbb tgtbcostgtg nttgcatgac costgtgtn cos acca cospptn cosmmtn nanamhh* t*atamhh 或或nnnanfmcmhh* t*tt*atfmcmhh 或或*anh*ah*anh coshh*na*at *nc*c*tc cos*ntcc cos/ntzmzmd cos2/ )(2/ )(2/ )(2

7、12121zzmzzmddant t*ant*atminsin/coshsin/hz 2222 costnnnttrmxmxmx cosntxx 內(nèi)內(nèi)嚙嚙合合）（外外/21 2121nnttmmmm 或或2121nntt 或或btbbtptgBpL nntttmBpBpB sincos/cos/sincoscostg r rbtgBL )tg(tg)tg(tg212211tattatzz ba2 3222coszcosmzmcosmdmzntnnv 22222cosdd)cosd( 3coszzminvmin 221)dd(a 21 21 21 21ttmm 1221coscos ttmmnn

8、nmmm 21nnn 211122122112 cosdcosdzzi 1212PPPPvvv 21190 漸開(kāi)線蝸桿漸開(kāi)線蝸桿阿基米德蝸桿阿基米德蝸桿延伸漸開(kāi)線蝸桿延伸漸開(kāi)線蝸桿圓弧齒圓柱蝸桿圓弧齒圓柱蝸桿環(huán)面蝸桿環(huán)面蝸桿錐蝸桿錐蝸桿)90(0 21 1212tatmmm111tan zmdq )(21221zqmrra 111111 tgmztgpztgldz 22mzd 111111tandmzdmzdpz 背錐背錐2cos2cosvvmzmzrr coszzv 11sin2 Rd 222 sinRd 1212122112sinsin ddzzi 090 2112tgctg i=20 7

9、-1 7-1 輪系及其分類輪系及其分類基本構(gòu)件構(gòu)件;122112zzi ;233223zzi ;34434343 zzi 45545454 zzi 43154343215432515443322154432312 zzzzzzzzzzzzzziiii 431543544323125115 zzzzzziiiii 積積所有主動(dòng)輪齒數(shù)的連乘所有主動(dòng)輪齒數(shù)的連乘積積所有從動(dòng)輪齒數(shù)的連乘所有從動(dòng)輪齒數(shù)的連乘定軸輪系傳動(dòng)比定軸輪系傳動(dòng)比 132132313113zzzzzziHHHHH 112111 nnHnHHnHHnzzzzi 112111 nnHnHHnHHnzzzzi 1121111nnHnHz

10、zzzii1321323113zzzzzznnnniHHH HHnn331 21 Hn211 HHnni3309011 HHnnHHii1311 10000999910010099101213213 zzzziH)10000(100001100009999111 HHii1000010100100100100101213213 zzzziH1001100001010011 Hi1001 Hi;122112zziHHH 233223zziHHH HH 22HHHi 211222040122112 zznni) 1 (221nn 8020042224 z ,z ,nn,n由由42 HHnnn)2(52Hnn Hnnn10221 1011