Whitworth quick return Mechanisms

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    Whitworth QuickReturn Mechanism

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    TIONThe Whitworth quick return mechanism converts rotary motion intoreciprocating motion, but unlike the crank and slider, the forwardreciprocating motion is slower rate than the return stroke. This is why it iscalled quick return mechanism.

    This mechanism is made of a driving crank and of a driven slider crank. In theconsidered conguration, the xed pivot of the driven crank is located on theoutside of the circle on which the end of the driving crank moves. This leadsto an alternated motion of the slider crank.

    The angular speed of the driven crank is variable. The duration of the motionfor its part corresponding to the blue arc is shorter than the one related to thered arc. This is why this device is named quick return mechanism, which wasused in crank shapers, with the slow part or the stroke being used for theworking time of the tool and the quick part for the nonproductive time.

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    Theory

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    "istory

    cutting machine by #ir $oseph Whitworth

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    %pplications

    &otary engines

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    'ower driven #aw machine

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    #haping machine

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    Water pumping system

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    #lider (rank )echanism

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    Whitworth *+uick return)echanism

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    Kinematic Analysis of the Whitworth

    Quick Return Mechanism !I" #$

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    %osition Analysis

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    &elocity Analysis

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    Acceleration Analysis

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    Dynamic Analysis of theWhitworth Quick Return

    Mechanism

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    !orces on 'ach

    Mem(er

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    &eferenceshttp=>>www.robotee.com>5&>3?@1AB&oboteecomWhitWorth(+uick&eturnmechanism.pdf

    http=>>metalab.uniten.edu.my>Ckamal>documents>)achineD1@0esignD1@5ab>5aboratoryD1@)anual>WhitworthEsD1@+uickD1@&eturnD1@)otionD1@:xperiment.pdf

    http=>>www.tcsme.org>'apers>9ol>9ol7o'aperA.pdf

    https=>>www.youtube.com>watchFvGHT2tJs;'e@

    http=>>www.mekanimalar.com>simpleBwhitworthBquickBreturnBmechanism.html

    http=>>Keanlouis.blanchard.pagespersoorange.fr>englishBswf>ppeBfstBquickBreturn.html

    http=>>textofvideo.nptel.iitm.ac.in>??1?@2?1?>lecJ.pdf

    htt >> t l b it d > k l>d t >) hi D1@0 i D1@5

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