13056961 maintenance drive mechanism
TRANSCRIPT
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" DRIVE MECHANISM "
PRESENTATIONPrepared by
Pradeep SinghIndustrial Engineering
Thapathali Campus
Thapathali, Ktm, Nepal
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Introduction
Drive mechanism is the process of transformingpower from one point to the other
Basically, there are four types of drive mechanisms
a. Belt Drive
b. Chain Drive
c. Gear Drive
d. Friction Drive
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Used for transforming power from one shaft to other which are at distant apartCan be used with high speed drives
Main disadvantage is slip and creep hence velocity ratiois not fixedThe cross-section of belt may be flat, v or other shape
Belt Drive
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Types of belt
According to materialo Leather o Rubber
o Balatao Textile or Fabric
According to structure
o Flat belto V belto Toothed belt
Fig: V belt
Fig: Toothedbelt
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Gear Drive
Used to transform rotary motion form one shaft toanother
Used for transmission of power and motion
Used for Positive drive i.e. to maintain constant velocityratio between shafts
Especially used when centre distance are relatively short
Comparatively, gear drives are more compact and canoperate at very high speed
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Types of Gear
Fig: Spur Gear Fig: Helical Gear
Pinion Gear Spur Gear
According to the position of axes of shaft
A. Gear with parallel axes
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Types of Gear
Fig: Spiral Bevel Gear
B. Gear with intersecting axes
Fig: Straight Bevel Gear
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Types of Gear
C. Gear with neither parallel nor intersecting axes
Pinion
Worm
Fig: Worm Gear
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Chain Drive
Belt built up of rigid links
Links are hinged together small wheel could be movedacross the surface of the largedisc giving an infinitelyvariable gear ratio .
This kind of engine is oftenused on scooters, mainly go-peds, in place of a chain,shaping machine, etc.
Fig: Chain
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Friction Drive
Friction Drive uses 2wheels on the engine to spinthe main wheel.
The small wheel could bemoved across the surface of the large disc giving aninfinitely variable gear ratio .
This kind of engine is oftenused on scooters , mainly go-peds, in place of a chain,shaping machine, etc.
http://en.wikipedia.org/wiki/Wheelhttp://en.wikipedia.org/wiki/Enginehttp://en.wikipedia.org/wiki/Gear_ratiohttp://en.wikipedia.org/wiki/Scooter_(motorcycle)http://en.wikipedia.org/wiki/Scooter_(motorcycle)http://en.wikipedia.org/wiki/Gear_ratiohttp://en.wikipedia.org/wiki/Enginehttp://en.wikipedia.org/wiki/Wheel -
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Friction Drive
Friction Drive uses 2wheels on the engine to spinthe main wheel.
The small wheel could bemoved across the surface of the large disc giving aninfinitely variable gear ratio .
This kind of engine is oftenused on scooters , mainly go-peds, in place of a chain,shaping machine, etc.
http://en.wikipedia.org/wiki/Wheelhttp://en.wikipedia.org/wiki/Enginehttp://en.wikipedia.org/wiki/Gear_ratiohttp://en.wikipedia.org/wiki/Scooter_(motorcycle)http://en.wikipedia.org/wiki/Scooter_(motorcycle)http://en.wikipedia.org/wiki/Gear_ratiohttp://en.wikipedia.org/wiki/Enginehttp://en.wikipedia.org/wiki/Wheel -
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Friction Drive
Friction Drive uses 2wheels on the engine to spinthe main wheel.
The small wheel could bemoved across the surface of the large disc giving aninfinitely variable gear ratio .
This kind of engine is oftenused on scooters , mainly go-peds, in place of a chain,shaping machine, etc.
http://en.wikipedia.org/wiki/Wheelhttp://en.wikipedia.org/wiki/Enginehttp://en.wikipedia.org/wiki/Gear_ratiohttp://en.wikipedia.org/wiki/Scooter_(motorcycle)http://en.wikipedia.org/wiki/Scooter_(motorcycle)http://en.wikipedia.org/wiki/Gear_ratiohttp://en.wikipedia.org/wiki/Enginehttp://en.wikipedia.org/wiki/Wheel -
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Thank You!!!