FIXING STRUCTURE OF AIR CHAMBER TUBE FOR TANDEM BOOSTER

摘要

PURPOSE: Fixing structure of an air chamber tube in a tandem booster is provided to prevent a bellows from being separated on the air chamber and to prevent breakage of a booster caused by separation of a rear diaphragm and the air chamber tube. CONSTITUTION: An end portion of an air chamber tube(26) is fixed on a center plate and the other end is placed on a bellows(20) of a rear diaphragm(19). A separation preventer(27) of a circular shape prevents the bellows from being separated by being protruded on an outer circumference of a rear end of the air chamber tube. The separation preventer is mounted on a rear side of a fixing unit of the bellows contacting with the outer circumference of the air chamber tube. Thereby, the fixing unit is not separated from the outer circumference of the air chamber tube to the rear side. The diaphragm is moved front and back by air or vacuum negative pressure through the control of a brake to synchronously move the front and rear plates. The separation preventer controls the movement by supporting the fixing unit of the bellows while the bellows losses combining force on the outer circumference of the air chamber tube.