8/9/2011

1

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Types of motion:

(a) translational,

(b) rotational

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Joints with:

(a) One degree,

(b) Two degrees of freedom

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Links:

(a) with two nodes, (b) with three nodes,

(c) with four nodes

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Simple engine mechanism

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Examples of four-bar chains

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8/9/2011

2

Cine film advance mechanism

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Toggle linkage

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Quick-return mechanism

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Cam and cam follower

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Cams:

(a) Eccentric,

(b) Heart-

shaped,

(c) Pear-

shaped

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Cam followers:

(a) point, (b) knife, (c)roller, (d) Sliding and

oscillating, (e) Flat, (f) Mushroom.

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8/9/2011

3

(a) Parallel gear axes,

(b) Axes inclined to one another.

(c) Axial teeth,

(d) Helical teeth,

(e) Double helical teeth

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Two meshed gears

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Simple gear train

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Compound gear trains

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Rack-and-pinion

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Ratchet and pawl

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8/9/2011

4

Belt drive

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Reversed belt drives:

(a) crossed belt,

(b) (b) open belt

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Types of belts

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Plain journal bearing

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Hydrodynamic journal bearing

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Basic elements of a ball bearing

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8/9/2011

5

Types of ball bearings:

a) Deep-Groove

b) Filling-Slot

c) Angular Contact

d) Double-Row

e) Self-Aligning

f) Thrust, Grooved race

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Roller bearings:

a) Straight Roller

b) Taper Roller

c) Needle Roller

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