自動消除齒輪齒條齒側間隙的機構設計
齒輪齒條穿洞(dong)中往(wang)往(wang)存(cun)在(zai)齒側間(jian)隙,為了傳(chuan)(chuan)動(dong)機構的雙向(xiang)傳(chuan)(chuan)動(dong)精度必(bi)須(xu)消除間(jian)隙。設(she)計了一種通過絲杠螺母機構軸向(xiang)的相對(dui)位(wei)移(yi)來帶動(dong)與齒輪相嚙合(he)的兩(liang)個(ge)齒條(tiao)(tiao),使兩(liang)齒條(tiao)(tiao)出現(xian)一個(ge)軸向(xiang)的相對(dui)位(wei)移(yi),即兩(liang)齒條(tiao)(tiao)錯齒,使當量齒厚(hou)增大,從(cong)而自動(dong)消除齒側間(jian)隙的機構。該(gai)機構已成功應用于齒輪齒條(tiao)(tiao)傳(chuan)(chuan)動(dong)的回轉工(gong)作臺(tai),結(jie)構簡單、傳(chuan)(chuan)動(dong)精度高、效果顯著。
在無(wu)間(jian)(jian)(jian)(jian)隙(xi)(xi)(xi)傳(chuan)動(dong)的(de)(de)(de)(de)(de)數控機(ji)床設備及機(ji)器人領域,經(jing)常用(yong)到齒(chi)(chi)輪(lun)(lun)齒(chi)(chi)條(tiao)(tiao)副傳(chuan)動(dong)。但(dan)(dan)齒(chi)(chi)輪(lun)(lun)齒(chi)(chi)條(tiao)(tiao)傳(chuan)動(dong)過程(cheng)中往往存在著齒(chi)(chi)側間(jian)(jian)(jian)(jian)隙(xi)(xi)(xi),影響雙(shuang)向傳(chuan)動(dong)精度。目前(qian)消(xiao)(xiao)(xiao)除齒(chi)(chi)輪(lun)(lun)條(tiao)(tiao)機(ji)構(gou)的(de)(de)(de)(de)(de)間(jian)(jian)(jian)(jian)隙(xi)(xi)(xi)通(tong)(tong)常采用(yong)的(de)(de)(de)(de)(de)方法(fa)是雙(shuang)片(pian)薄齒(chi)(chi)輪(lun)(lun)錯(cuo)齒(chi)(chi)調整(zheng)法(fa)。在該(gai)方法(fa)中,當(dang)齒(chi)(chi)輪(lun)(lun)齒(chi)(chi)條(tiao)(tiao)機(ji)構(gou)出現(xian)間(jian)(jian)(jian)(jian)隙(xi)(xi)(xi)時,通(tong)(tong)過彈簧(huang)的(de)(de)(de)(de)(de)拉力(li)(li)使兩(liang)片(pian)薄齒(chi)(chi)輪(lun)(lun)相(xiang)互錯(cuo)位(wei)。雖然(ran)該(gai)方法(fa)能夠自(zi)(zi)(zi)動(dong)的(de)(de)(de)(de)(de)消(xiao)(xiao)(xiao)除間(jian)(jian)(jian)(jian)隙(xi)(xi)(xi),但(dan)(dan)由于傳(chuan)遞(di)轉矩(ju)受(shou)到彈簧(huang)拉力(li)(li)的(de)(de)(de)(de)(de)限制,此類消(xiao)(xiao)(xiao)隙(xi)(xi)(xi)機(ji)構(gou)只能用(yong)在傳(chuan)動(dong)負載較(jiao)小的(de)(de)(de)(de)(de)場合。而(er)且結構(gou)比較(jiao)復雜、安裝比較(jiao)困(kun)難。為了(le)改進(jin)目前(qian)的(de)(de)(de)(de)(de)自(zi)(zi)(zi)動(dong)消(xiao)(xiao)(xiao)隙(xi)(xi)(xi)機(ji)構(gou)存在的(de)(de)(de)(de)(de)缺陷,設計了(le)一種的(de)(de)(de)(de)(de)利(li)用(yong)齒(chi)(chi)條(tiao)(tiao)錯(cuo)齒(chi)(chi)來自(zi)(zi)(zi)動(dong)消(xiao)(xiao)(xiao)隙(xi)(xi)(xi)的(de)(de)(de)(de)(de)機(ji)構(gou)。