Page 2: Gear Systems and Smart Materials

This page covers advanced mechanical systems including gear trains, pulleys, and introduces smart materials and their applications.

Definition: Gear trains consist of meshed cog wheels that transfer rotary motion and can modify speed and force.

Highlight: Smart materials are advanced materials that can respond to various environmental stimuli including temperature, light, and electrical fields.

The page explores various mechanical components:

• Gear systems with drive and driven gears
• Pulley and belt mechanisms for force reduction
• Cam systems with different follower types

Example: Thermochromic pigments demonstrate smart material properties by changing color in response to temperature variations.

Vocabulary: Piezoelectric materials are smart materials that respond to electrical signals, showcasing the integration of electrical and mechanical properties.

The content concludes with detailed explanations of different cam types (eccentric, pear, snail, and heart) and their specific applications in mechanical systems.

Page 1: Mechanical Devices and Motion Types

This page introduces fundamental concepts of mechanical motion and lever systems in design technology. The content explores different types of movement and mechanical advantages in various devices.

Definition: Mechanical devices are components that exhibit movement during operation, essential for creating functional machines and tools.

Example: Common applications of lever systems include scissors, weighing scales, and nutcrackers, each demonstrating different mechanical advantages.

Vocabulary: Reciprocating motion refers to repetitive back-and-forth movement in a linear pattern.

The page details three primary types of motion:

• Linear motion (movement in one straight direction)
• Oscillating motion (repetitive movement on a curve)
• Rotary motion (circular movement around an axis)

Highlight: Levers are classified into three orders based on the position of the effort, load, and fulcrum, each providing different mechanical advantages.

The page concludes with an explanation of linkages, which are mechanisms using rigid parts to modify force magnitude, direction, or motion type.