| 摘要 |
PURPOSE: A brake device of a vehicle is provided to improve the controlling stability by absorbing vibration of a push rod assembly of double structure. CONSTITUTION: A push rod assembly comprises a first rod(22) having a storing groove(22a) and a second rod(24) to be inserted inside the first rod(22) by installing in a spring(26). The second rod(24) is compressed by a piston rod(2). A damping rubber(28) is stuck to a wall of the storing groove(22a). The first rod(22) is compressed by inserting inside a first piston(12) in a brake master cylinder(10). In pushing a brake pedal, pressurizing force of the brake pedal is transferred to the first rod(22) by amplifying through a booster(6). The first rod(22) pushes the second rod(24). Hydraulic pressure is formed by sequentially pressurizing the first piston(12) and a second piston(14) through the second rod(24). In transferring vibration through the first piston(12), the vibration is transferred to the second rod(24). The vibration is absorbed by the spring(26) and the damping rubber(28).
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