Mechanical Devices In this topic you will learn

Mechanical Devices

In this topic you will learn about: § Different types of movement § What levers and linkages are and what they do § The different orders of lever § How to convert one type of motion to another § How diagrams and symbols are used to represent mechanisms § Changing the magnitude and direction of forces in rotary systems.

A mechanism is simply a device that changes an input motion into a different output motion. It normally changes the amount of movement or the direction of movement in some way to make a job easier. Key Words Mechanism – a device which changes an input motion into a different output motion Lever – a mechanism that moves around a fixed point 9 a pivot)

§To be able to identify the four types of movement §To be able to describe the four different types of movement

Is the action or process of moving or of changing place or position https: //www. youtube. com/watch? v=F 0 N 1 A 6 n. E 6 Ss

What mechanisms have helped you today? How did you get to school? Mechanisms help us do things!

Types of motion There are four basic types of motion in mechanical systems:

Linear • Linear motion is a movement in a straight line.

Reciprocating • Reciprocating motion is moving backwards and forwards in a straight line, as in cutting with a saw.

Rotary • Rotary motion is turning round in a circle, such as a wheel turning.

Oscillating • Oscillating motion is swinging from side to side, like a pendulum in a clock.