Skip to main content

NX CAD Design....

 
Post a Comment

What is Drum Brakes?

  


What is Drum Brakes?

Drum Brakes system Consists of a pan Shaped Drum, it have two brake shoes, a backing plate and a wheel cylinder or an operating cam (mechanical linkage).A drum brake is a brake that uses friction caused by a set of shoes or pads that press outward against a rotating cylinder-shaped part called a brake drum. 

              




Function of Drum Brakes

  • BRAKES SHOES
  • BRAKE LINING
  • BACKING PLATE
  • BRAKE SPRINGS
  • BRAKE DRUM
  • LEADING SHOE AND TRAINING SHOE
  • WHEEL CYLINDER
  • SELF ADJUSTER LEVER
  • ADJUST SPRING
  • SHOE LOWER RETURN SPRING


Working

The Drum is attached to the axle or Hub flange, just inside the wheel, and it rotates directly with the wheel. The brake shoes just inside the wheel, and it Rotates directly with the wheel. the brake shoes are positioned just inside the drum and are mounted on the backing plate.the outer surface of the shoes are lined with the friction material, to increase frictional coefficient. They are anchored to the braking plate so that they can pivot into and out of contact with the drum but cannot rotate with it. This kind of brake drum is known as Internal expanding brakes.











The brake forces are transmitted from the the shoes to the anchor, to the backing plate, and then to the suspension member. and  the brake pedal is  pressed and the brake shoes are pushed outwards so that the lining is forced against the drum. This force comes from the hydraulic wheel cylinder or from the mechanical linkage of the parking brake. when the brake pedal is released, it causes the brake shoes to return to their original positions through the action of the brake springs.

Common Things

The drum brake is a traditional type of brake and was used previously on all four wheels. presently, they are mostly used on the rear wheels of many vehicles.

In Earlier cars, the brake drum had a band with lining wrapped around the drum. when the brakes are applied, the band is tightened on the drum, there by applying the brakes. This type of brake was called as External Contracting Brakes.

Types of Drum Brakes

Drum brakes are three types-

  1. Leading and trailing shoe type
  2. Two leading shoe type
  3. Duo Servo type


         

  



Labels:

Comments

Post a Comment

Popular posts from this blog

NX CAD Design....

 
Post a Comment
Read more

WORKSHOP : Precautions || workshop || Safety

  What safety precautions should be observed while working in the workshop ? 1) Keep shop floor clean, free from oil and other slippery materials. 2) Wear proper dress and avoid loose clothing and loose hair. 3) Wear shoes and avoid chapels. 4) Avoid playing, loose talk and funning inside the shop floor. 5) Keep good housekeeping and put all unnecessary items and rejected items in scrap box. 6) Learn everything about the machine before starting and clear all the doubts. 7) Keep a safe distance from rotating and sliding parts. 8) Never store inflammable materials inside or around the shop. 9) Never play with electricity, fire, parts with sharp edge etc. 10) Keep fire buckets and extinguishers ready for use.  
Post a Comment
Read more

Battery: definition, functions, Types, History, components, diagram,

 BATTERY: A battery in automobiles, is an electrochemical device which produce electricity (current) through chemical action inside it. The battery does not store electricity a electrons. The battery stores energy in the chemical form. The electrical energy is produced in the battery by the chemical reaction that occurs between two dissimilar plates that are immersed in a electrolyte solution.  The automotive batteries are rechargeable, therefore, they can also convert a electrical current into chemical energy and stores that energy until it is needed. The amount of electrical energy that a battery can produce depends upon the size, weight,  active area of plates, and the amount of sulphuric acid in the electrolyte. The greatest requirement of electrical energy from the battery occurs when it supplies current for operating the starter in When the engine is started, the vehicle's charging system (generator) supplies current to recharge the battery and to run the electrica...
Post a Comment
Read more