VACUUM CONNECTING PIPE OF BRAKE BOOSTER FOR VEHICLE

摘要

PURPOSE: A vacuum connecting pipe is provided to increase reliability of a brake energizing device by preventing the vacuum connecting pipe from rotating and twisting even when receiving vibration caused by engine drive or external force. CONSTITUTION: A vacuum connecting pipe(60) of a brake booster is combined to a front cell(11) of a casing(10) by using a sealing member(70) for connecting a vacuum hose(80) with a static pressure chamber(20) of booster. Herein, a fixing protrusion(14) is formed in the front cell for being projected, and a fixing hole(65) is formed on an external flange unit(63) of the vacuum connecting pipe. Therefore, the fixing protrusion is inserted to the fixing hole while combining the vacuum connecting pipe to be prevented from being rotated or distorted. Moreover, a gap is not generated between the sealing member and one end part(61) of the vacuum connecting pipe by maintaining the initial combining state for keeping the vacuum rate of the constant pressure chamber. Therefore, the reliability on the booster is improved.