Mechanisims

1. rotary linear.
   1. wheel.

      Annotations:

      • let un move more easily because they reduce our contact with the ground and decrease friction.
   2. nut and bolt.

      Annotations:

      • transform rotary motion into linear motion.
   3. rack and pinion.

      Annotations:

      • rack is a bar with many teeth and the pinion with teeth thet interlock with the rack
   4. winch and crank.

      Annotations:

      • is a cylinder that rotaes around a horizontal axix. Formula F·d= R·r
2. reciprocating rotary.
   1. crank and rod.

      Annotations:

      • the piston moves a rod forward and backwrd.
   2. crankshaft.

      Annotations:

      • the rods are connected to cranck and the crancs are conected to the crankshaft. The cranshaft mechanisim can sychonise the movements of varius pats.
   3. cam.

      Annotations:

      • has a irregulary shaped device tath rotates on a shaft.

1. speed reduction.

   Annotations:

   • brakes use friction to reduce speed.
   1. disk brakes

      Annotations:

      • a disc is connected to the axle.
   2. band brakes

      Annotations:

      • a drum is connected an axle.
   3. drum brakes

      Annotations:

      • a drum is connected to the axle.
2. direction control.

   Annotations:

   • ratches is a mechanism that controls the direction of motion.

Annotations:

• absorb, accumulate or disipate the energy that the recive.

1. accumulation

   Annotations:

   • springs and flexible
   1. compression
   2. traction
   3. torsion
2. dssipation

   Annotations:

   • they absorb and dissipate motion
   1. shock absorbers
   2. leaf springs

Annotations:

• transmit rotation from one axix of rotation to another

1. rigid
2. clutches
3. flexible

Annotations:

• support tishat holds a rotating shaft  is called a bearing.

1. plain
2. antifriction
3. inner
4. outer
5. rolling
6. retainer