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Anglicky v odborných předmětech "Support of teaching technical subjects in English “

Anglicky v odborných předmětech "Support of teaching technical subjects in English “. Tutorial : Engineering technology Topic : Transmission by gear wheels Prepared by: Ing. Jaroslav Hábl. Projekt Anglicky v odborných předmětech, CZ.1.07/1.3.09/04.0002

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Anglicky v odborných předmětech "Support of teaching technical subjects in English “

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  1. Anglicky v odborných předmětech"Support ofteachingtechnicalsubjects in English“ Tutorial: Engineering technology Topic: Transmission by gear wheels Prepared by: Ing. Jaroslav Hábl Projekt Anglicky v odborných předmětech, CZ.1.07/1.3.09/04.0002 je spolufinancován Evropským sociálním fondem a státním rozpočtem České republiky.

  2. Is the gear with constant gear ratio (without slippage). It is used for small axis distances. Gear is accurate with high efficiency. Production of wheels is expensive. TRANSMISSON BY GEARS WHEELS

  3. TRANSMISSON BY GEARS WHEELS GEAR RATIO

  4. TRANSMISSON BY GEARS WHEELS Types of gears according to teeth shape a) direct b) oblique c) herring bonegear ( double oblique)

  5. TRANSMISSON BY GEARS WHEELS Types of gears according to teeth shape bent bolt spiralcylindrical

  6. TRANSMISSON BY GEARS WHEELS Types of gear trains Gear train with Gear train with Gear train withparallel axis axis going to various skew axis sides

  7. TRANSMISSON BY GEARS WHEELS Involute gear tooth formation r – pitch linen – generatrixb1 – base circlee - involute

  8. TRANSMISSON BY GEARS WHEELS Basic tooth profile p – teeth pitchs –teeth thicknesse – teeth gap widthr – pitch linem – moduleha – tooth head heighthf – tooth heel heightc – clearance

  9. TRANSMISSON BY GEARS WHEELS SIZES OF TOOTHING AS THE MODULE FUNCTION Tooth head heightha = mTooth heel heighthf = m + cTooth heighth = ha + hf = 2,25 mPitch line diameter d1 = z . mAddendum circle diameterda = d + 2ha = d + 2 mHeel circle diameterdf= d – 2hf = d – 2,5 m

  10. Literature • Stroje a zařízení I, J. Doleček, P. Gajdoš, V. Novák • Strojnictví I, J. Doleček, Z. Holoubek • Strojnictví II, J. Doleček, Z. Holoubek • Moderní strojírenství, Josef Dilinger a kolektiv

  11. Write down the formula for the calculation of gear ratio. • Name at least 3 types of toothed gear trains. • Draw bearing with oblique contact.

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