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，滾珠絲杠螺母對自鎖，能說不，在沒有預(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，負載也可以很大。預(yù)加載是分層的，根據(jù)應(yīng)用程序請求進行決策，可以詳細檢查不同的樣品。

 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

    利用一個螺母上的外肋，通過圓形螺母調(diào)整兩個螺母的軸向位置來完成預(yù)緊。

    Usingtheouterribononenut,theabsoluteaxialpositionofthetwonutsisadjustedbytheroundnuttocompletethepretightening.

    3.雙螺帽齒差式預(yù)緊

    3.Doublenuttoothdifferencepretightening

    齒數(shù)差為1的齒輪與兩個螺母的法蘭分離。兩個齒輪分離，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。在螺母中一個螺母的轉(zhuǎn)移改變了兩個螺母的位置來調(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)緊時的空行程，減少倒檔，無倒檔死區(qū)，提高傳動剛度和傳動精度.

 Thepurposeofeliminatingtheaxialclearanceoftheballscrewnutpairistoincreasetheemptystrokewhenpreloading,reducethereversegear,noreversedeadzone,andimprovethetransmissionrigidityandaccuracy

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