SERVOMECHANISM OF VEHICLE BRAKE

摘要

PURPOSE: A servomechanism of a vehicle brake is provided to easily produce and install the airtight structure of an outer tie rod as well as to increase airtight property of the tie rod. CONSTITUTION: Air is inlet to a transformer chamber through the air suction unit of a valve body with the advance of an input shaft. There is pressure difference between the transformer chamber and a constant pressure chamber and then a diaphragm and a power piston(26) are pushed to the constant pressure chamber. An amplified force is fed to the piston of a master cylinder through an output shaft. When pressure of the transformer chamber is more than pressure of the constant pressure chamber, an airtight member(41) is more bonded on the outer face of a tie rod(40). An inner face(41a) of the airtight member keeps being separated from the outer face of the tie rod. Then the airtight member slides along the outer face of the tie rod.