structures and mechanisms
DESCRIPTION
Structures and Mechanisms. Follower. Cam. Cam and Follower. The cam and follower is a device which can convert rotary motion (circular motion) into linear motion (movement in a straight line). Cams. Followers (valves). Cam and Follower. follower. - PowerPoint PPT PresentationTRANSCRIPT
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Structures
and
Mechanisms
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Cam and Follower
Cam
Follower
• The cam and follower is a device which can convert rotary motion (circular motion) into
linear motion (movement in a straight line).
Followers (valves)
Cams
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Cam and Follower
• The cam can have various shapes. These are know as cam profiles.
Pear Heart Circular Drop
Cam
follower
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Cam and Follower
• A follower is a component which is designed to move up and down as it follows the edge of the cam.
Knife edge
Follower
Flat foot
follower
Off set
follower
Roller
follower
cam
Follower
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Cam and Follower• The 'bumps' on a cam are called lobes.
• The square cam illustrated has four lobes, and lifts the follower four times each revolution.
Square cam
Follower
Examples of other rotary cam profiles.
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Cam and Follower
Examples of a Rotary cams in operation.
Control the movement of the engine valves.
Cams used in a pump.
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Cam and Follower• The linear cam moves backwards and forwards in
a reciprocating motion.
Linear cam
Distance moved by the follower
Cam Follower
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Cam and Follower
• Cams can also be cylindrical in shape
• Below a cylindrical cam and roller follower.
• The cam follower does not have to move up and down - it can be an oscillating lever as shown above.
Cam rise and Fall
Max Lift
Min Lift