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是否所有滾珠絲杠螺母對(duì)都是預(yù)緊的?
來(lái)源:http://m.kezhirui.com/ 日期:2020-01-31 發(fā)布人:
滾珠絲杠螺母副是一種高精度的傳動(dòng)裝置。采用滾動(dòng)摩擦螺桿代替滑動(dòng)摩擦螺桿,具有磨損小、傳動(dòng)效率高、傳動(dòng)穩(wěn)定、壽命長(zhǎng)、精度高、溫度高等特點(diǎn)。由于滾珠絲杠螺母副具有摩擦小、容易傳動(dòng)間隙等凸出的優(yōu)點(diǎn),它給電機(jī)系統(tǒng)的功能改進(jìn)帶來(lái)很大的好處。故障:不能自鎖,對(duì)于升降驅(qū)動(dòng)需要增加額外的鎖緊裝置。
Ballscrewnutpairisakindofhighprecisiontransmissiondevice.Usingrollingfrictionscrewinsteadofslidingfrictionscrewhasthecharacteristicsofsmallwear,hightransmissionefficiency,stabletransmission,longlife,highaccuracy,hightemperature,etc.Becausetheballscrewnutpairhastheadvantagesofsmallfriction,easytoeliminatethetransmissiongapandotherbulges,itbringsgreatbenefitstothefunctionalimprovementofthemotorsystem.Fault:unabletoselflock,additionallockingdeviceisrequiredforliftingdrive.
預(yù)緊是為了避免滾珠滑動(dòng),滾珠絲杠螺母對(duì)自鎖,能說(shuō)不,在沒(méi)有預(yù)緊的情況下容易散落。
Pretighteningistoavoidtheballsliding.Theballscrewnutisself-locking.Itcanbesaidthatitiseasytoscatterwithoutpretightening.

不是所有的滾珠絲杠都是預(yù)緊的,如果主要看一下精度要求,一般的預(yù)緊精度很高,負(fù)載也可以很大。預(yù)加載是分層的,根據(jù)應(yīng)用程序請(qǐng)求進(jìn)行決策,可以詳細(xì)檢查不同的樣品。
Notallballscrewsarepretightened.Ifyoumainlylookattheaccuracyrequirements,thegeneralpretighteningaccuracyisveryhighandtheloadcanbeverylarge.Preloadingislayered,makingdecisionsbasedonapplicationrequests,allowingyoutoexaminesamplesofdifferentbrandsindetail.
預(yù)緊滾珠絲杠有四種方法:
Therearefourwaystopretightentheballscrew:
1.雙螺母墊圈式預(yù)緊
1.Doublenutwashertypepretightening
該系統(tǒng)簡(jiǎn)單可靠。剛性好,使用更普遍。在雙螺母之間加裝墊片的情況下,可以有業(yè)余廠家根據(jù)用戶的要求調(diào)整好預(yù)緊,使更后的裝卸十分方便。
Thesystemissimpleandreliable.Goodrigidity,mostcommonlyused.Inthecaseofaddinggasketbetweenthetwonuts,amateurmanufacturerscanadjustthepretighteningaccordingtotheuser'srequirements,sothatthefinalloadingandunloadingisveryconvenient.
2.雙螺母加肋預(yù)緊
2.Doublenutribpretightening
利用一個(gè)螺母上的外肋,通過(guò)圓形螺母調(diào)整兩個(gè)螺母的軸向位置來(lái)完成預(yù)緊。
Usingtheouterribononenut,theabsoluteaxialpositionofthetwonutsisadjustedbytheroundnuttocompletethepretightening.
3.雙螺帽齒差式預(yù)緊
3.Doublenuttoothdifferencepretightening
齒數(shù)差為1的齒輪與兩個(gè)螺母的法蘭分離。兩個(gè)齒輪分離,并與兩端的內(nèi)齒輪環(huán)嚙合。內(nèi)齒圈用螺絲固定在螺母座上。在螺母中一個(gè)螺母的轉(zhuǎn)移改變了兩個(gè)螺母的位置來(lái)調(diào)整間隙和施加預(yù)緊力。
Thegearwithatoothnumberdifferenceof1isseparatedfromtheflangeoftwonuts.Thetwogearsseparateandmeshwiththeinnergearringsatbothends.Theinnerringgearisfixedonthenutseatwithscrews.Thetransferofonenutinthenutchangesthepositionofthetwonutstoadjusttheclearanceandapplythepreload.
4.單螺母,可變導(dǎo)程自預(yù)緊
4.Singlenut,variableleadselfpreloading
螺母的內(nèi)肋滾道在中間的圓上產(chǎn)生導(dǎo)程突變,使左右兩端的球在裝置后軸向錯(cuò)位,完成預(yù)緊。
Theinnerribracewayofthenutproducesasuddenchangeofleadonthemiddlecircle,whichmakestheballsattheleftandrightendsofthenutaxialdislocationafterthedeviceandcompletesthepretightening.
滾珠絲桿螺母副軸向間隙的目的:增加預(yù)緊時(shí)的空行程,減少倒檔,無(wú)倒檔死區(qū),提高傳動(dòng)剛度和傳動(dòng)精度.
Thepurposeofeliminatingtheaxialclearanceoftheballscrewnutpairistoincreasetheemptystrokewhenpreloading,reducethereversegear,noreversedeadzone,andimprovethetransmissionrigidityandaccuracy
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