Ballscrewnutpairisakindofhighprecisiontransmissiondevice.Usingrollingfrictionscrewinsteadofslidingfrictionscrewhasthecharacteristicsofsmallwear,hightransmissionefficiency,stabletransmission,longlife,highaccuracy,hightemperature,etc.Becausetheballscrewnutpairhastheadvantagesofsmallfriction,easytoeliminatethetransmissiongapandotherbulges,itbringsgreatbenefitstothefunctionalimprovementofthemotorsystem.Fault:unabletoselflock,additionallockingdeviceisrequiredforliftingdrive.

    預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緊的，如果主要看一下精度要求，一般的預緊精度很高，負載也可以很大。預加載是分層的，根據應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.

    預緊滾珠絲杠有四種方法:

    Therearefourwaystopretightentheballscrew:

    1.雙螺母墊圈式預緊

    1.Doublenutwashertypepretightening

    該系統簡單可靠。剛性好，使用更普遍。在雙螺母之間加裝墊片的情況下，可以有業余廠家根據用戶的要求調整好預緊，使更后的裝卸十分方便。

    Thesystemissimpleandreliable.Goodrigidity,mostcommonlyused.Inthecaseofaddinggasketbetweenthetwonuts,amateurmanufacturerscanadjustthepretighteningaccordingtotheuser'srequirements,sothatthefinalloadingandunloadingisveryconvenient.

    2.雙螺母加肋預緊

    2.Doublenutribpretightening

    利用一個螺母上的外肋，通過圓形螺母調整兩個螺母的軸向位置來完成預緊。

    Usingtheouterribononenut,theabsoluteaxialpositionofthetwonutsisadjustedbytheroundnuttocompletethepretightening.

    3.雙螺帽齒差式預緊

    3.Doublenuttoothdifferencepretightening

    齒數差為1的齒輪與兩個螺母的法蘭分離。兩個齒輪分離，并與兩端的內齒輪環嚙合。內齒圈用螺絲固定在螺母座上。在螺母中一個螺母的轉移改變了兩個螺母的位置來調整間隙和施加預緊力。

 Thegearwithatoothnumberdifferenceof1isseparatedfromtheflangeoftwonuts.Thetwogearsseparateandmeshwiththeinnergearringsatbothends.Theinnerringgearisfixedonthenutseatwithscrews.Thetransferofonenutinthenutchangesthepositionofthetwonutstoadjusttheclearanceandapplythepreload.

    4.單螺母，可變導程自預緊

    4.Singlenut,variableleadselfpreloading

    螺母的內肋滾道在中間的圓上產生導程突變，使左右兩端的球在裝置后軸向錯位，完成預緊。

 Theinnerribracewayofthenutproducesasuddenchangeofleadonthemiddlecircle,whichmakestheballsattheleftandrightendsofthenutaxialdislocationafterthedeviceandcompletesthepretightening.

    滾珠絲桿螺母副軸向間隙的目的:增加預緊時的空行程，減少倒檔，無倒檔死區，提高傳動剛度和傳動精度.

 Thepurposeofeliminatingtheaxialclearanceoftheballscrewnutpairistoincreasetheemptystrokewhenpreloading,reducethereversegear,noreversedeadzone,andimprovethetransmissionrigidityandaccuracy

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