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Functions of Brakes,Types of Brakes,Working of Internal Expanding Brake.

 Functions of Brakes:

 Brakes are essential components of any vehicle or machinery that require stopping or slowing down. The primary functions of brakes are:

 1. Stopping the vehicle/machinery quickly and safely

 2. Controlling the speed of the vehicle/machinery 

3. Preventing the vehicle/machinery from rolling back on slopes

 4. Reducing wear and tear of the tires or other moving parts 

5. Protecting the transmission system from damage due to sudden stops or jerks


Types of Brakes:

 1. Mechanical Brakes: These brakes use cables or rods to activate the brake shoes, which press against the rotating drums or discs to slow down or stop the vehicle/machinery. Examples of mechanical brakes include bicycle brakes, hand brakes on cars, and some industrial machinery.

 2. Hydraulic Brakes: These brakes use hydraulic fluid to transmit pressure to the brake shoes or pads, which press against the rotating drums or discs. Hydraulic brakes are commonly used in cars, trucks, and other heavy-duty vehicles. 

3. Pneumatic Brakes: These brakes use compressed air to transmit pressure to the brake shoes or pads, which press against the rotating drums or discs. Pneumatic brakes are commonly used in large trucks, buses, and trains. 

4. Electromagnetic Brakes: These brakes use an electromagnetic field to slow down or stop the rotating shaft. Electromagnetic brakes are commonly used in industrial machinery and in some hybrid and electric cars.



Working of Internal Expanding Brake:

                                                            Internal expanding brakes are a type of mechanical brake commonly used in automobiles, motorcycles, and bicycles. These brakes consist of two brake shoes that are placed inside a rotating drum. When the brake pedal is pressed, a lever or cable pulls the brake shoes outwards, causing them to press against the inside surface of the drum, which slows down or stops the rotation.

 The working of internal expanding brakes can be summarized in the following steps: 

1. The brake pedal is pressed, which activates a lever or cable.

 2. The lever or cable pulls the brake shoes outwards.

 3. The brake shoes press against the inside surface of the rotating drum.

 4. Friction between the brake shoes and the drum slows down or stops the rotation. 




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