Patent ID: 6736243
Filing Date: 2004-05-18
Classification: B62L,F16D

Abstract:
A mechanical type disc brake for bicycle, comprising a housing, a mounting bracket, a pull bar, an actuating rod, a toggle mechanism, a pair of sliders, two brake linings, and a restoring element;said housing being designed for mounting on a fork of the bicycle and locating said mounting bracket, said pull bar, said actuating rod, said toggle mechanism, said sliders, said brake linings, and said restoring element at predetermined positions therein or thereon; said housing being closed at two opposite ends with two adjusting caps screwed thereunto; said mounting bracket being designed for connecting said housing to said bicycle fork; said pull bar being a force transmitting member and functioning as an arm of force according to the leverage principle to amplify a braking force; said actuating rod being connected to said pull bar to convert a force applied via said pull bar into an upward pull that is transmitted to said toggle mechanism via said actuating rod; said toggle mechanism including a left and a right actuating blocks that are two flat members having a slightly upward bent shape and adapted to lap each other at respective inner ends, and a conical restoring spring; said left and said right actuating blocks being in contact with a lower end of said actuating rod and providing an effective and ideal braking curve through a toggle action to achieve a brake action; said pair of sliders being located at two outer sides of said toggle mechanism to push said brake linings for the latter to tightly clamp brake discs to create the brake effect; said brake linings being adapted to stop said brake discs from turning; and said restoring element being mounted between said two brake linings for restoring said brake linings to an initial position thereof; whereby when said pull bar is pulled to cause said actuating rod to vertically act on said toggle mechanism, said actuating blocks of said toggle mechanism are outward moved to push said pair of sliders and said brake linings to create a brake effect without producing an overly large frictional force between said brake linings and said brake discs to result in locked brake discs while an ideal braking curve and increased braking force may be effectively provided.