機(jī)械設(shè)計(jì)基礎(chǔ)精品課程鍵連接

機(jī)械設(shè)計(jì)基礎(chǔ)精品課程鍵連接§3-1鍵聯(lián)接Keyjoints

分類Typesofthekeyjoints平鍵聯(lián)接的尺寸選擇和強(qiáng)度計(jì)算Optionofsizesandstrengthcalculationsforstraightkeyjoints機(jī)械設(shè)計(jì)基礎(chǔ)精品課程鍵連接一、分類Typesofthekeyjoints

KeyjointsLoosejointsTightjointsStraightkeyjointsWoodruffkeyjointsOrdinarystraightkeyjointsGuidingandslidingstraightkeyjointsTaperkeyTaperkeyjointsTangentdouble-taperkeyjoints機(jī)械設(shè)計(jì)基礎(chǔ)精品課程鍵連接普通平鍵聯(lián)接OrdinarystraightkeyjointsRoundedendSquareendOneroundedandonesquareend機(jī)械設(shè)計(jì)基礎(chǔ)精品課程鍵連接導(dǎo)向平鍵和滑鍵Guidingandslidingstraightkey機(jī)械設(shè)計(jì)基礎(chǔ)精品課程鍵連接3.半圓鍵Woodruffkey機(jī)械設(shè)計(jì)基礎(chǔ)精品課程鍵連接4.楔鍵聯(lián)接Taperkeyjoint機(jī)械設(shè)計(jì)基礎(chǔ)精品課程鍵連接5.切向鍵聯(lián)接Tangentdouble-taperkeyjoint機(jī)械設(shè)計(jì)基礎(chǔ)精品課程鍵連接1、失效形式Typesoffailure⑴主要失效形式Themaintypesoffailure：工作面壓潰Crushing（靜聯(lián)接Fixedjoints）工作面磨損Wear（動(dòng)聯(lián)接Slidingjoints）二、平鍵聯(lián)接的尺寸選擇和強(qiáng)度計(jì)算Selectionofsizesandstrengthcalculationsforstraightkeyjoints機(jī)械設(shè)計(jì)基礎(chǔ)精品課程鍵連接⑵有時(shí)：鍵剪斷shearfailureofthekey（一般不作計(jì)算，重要時(shí)驗(yàn)算Nosuchstrengthcalculationsarerequiredindesigning.）工作面的壓潰或磨損發(fā)生在鍵、軸和轂三者中較弱的零件上，一般為轂。Crushingorwearoftheoperatingsurfacesusuallytakeplaceontheelementsofwhichthestrengthisweakestamongthekey,shaftandhub.Anditusuallyoccursonthehub.機(jī)械設(shè)計(jì)基礎(chǔ)精品課程鍵連接2.計(jì)算公式Calculations機(jī)械設(shè)計(jì)基礎(chǔ)精品課程鍵連接3.平鍵聯(lián)接的計(jì)算步驟

DesignprocedureforstraightkeyjointsBACK機(jī)械設(shè)計(jì)基礎(chǔ)精品課程鍵連接花鍵聯(lián)接的特點(diǎn)Featuresofsplinejoints

花鍵聯(lián)接的分類Typesofsplinejoints§3-2花鍵聯(lián)接Splinejoints依靠軸和轂上齒的互壓傳遞轉(zhuǎn)矩，可用于動(dòng)聯(lián)接和靜聯(lián)接。Theteethofshaftandhubpresseachother,throughwhichthetorqueistransmitted.Thesplinejointscanbeusedforbothfixedandslidingjoints.機(jī)械設(shè)計(jì)基礎(chǔ)精品課程鍵連接一、花鍵聯(lián)接的特點(diǎn)FeaturesofsplinejointsWithrespecttostraightkeyjoints:UniformforcedistributionLessstressconcentrationMoreaccuratelycenteredTeetharedifficulttobemanufactured機(jī)械設(shè)計(jì)基礎(chǔ)精品課程鍵連接二、花鍵聯(lián)接的分類Typesofsplinejoints（矩形花鍵Rectanglespline、漸開(kāi)線花鍵Involutespline、三角形花鍵Trianglespline）機(jī)械設(shè)計(jì)基礎(chǔ)精品課程鍵連接三、花鍵的定心方式

Centeringmethodsofspline

矩形花鍵定心方式MajordiameterfitMinordiameterfitFitonsidesofspline機(jī)械設(shè)計(jì)基礎(chǔ)精品課程鍵連接漸開(kāi)線花鍵定心方式MajordiameterfitSidefitBACK機(jī)械設(shè)計(jì)基礎(chǔ)精品課程鍵連接§3-3銷聯(lián)接Pinjoints銷聯(lián)接的功用Functionsofpinjoints

銷的分類Typesofpinjoints機(jī)械設(shè)計(jì)基礎(chǔ)精品課程鍵連接（1）定位Locating（2）安全裝置Safetydevice（3）傳遞不大的載荷Transmitrelativelysmallloads一、銷聯(lián)接的功用Functionsofpinjoints

機(jī)械設(shè)計(jì)基礎(chǔ)精品課程鍵連接二、銷的分類Typesofpin（1）普通圓柱銷Plaincylindricalpins（多次裝拆，定位精度下降Locatingprecisionisloweredafterdisassembledmanytimes）（2）普通圓錐銷Plaintaperpins（錐度1：50、自鎖、可以多次裝拆Withataperof1:50,selflocking,maybedisassembledformanytimes）機(jī)械設(shè)計(jì)基礎(chǔ)精品課程鍵連接（3）特殊形式銷Specialtypesofpin①孔未開(kāi)通或拆卸困難時(shí)：螺尾錐銷Wit