To provide a negative pressure type booster which can effectively inhibit vibration and noise without impairing responsiveness during operation.SOLUTION: A negative pressure type booster 100 includes: a booster shell 110; a movable partition wall 120 which partitions the booster shell 110 into a negative pressure chamber R1 and a variable pressure chamber R2 in an air-tight manner and comprises a plate member 121 and a diaphragm 122; a valve body 130 to which the movable partition wall 120 is connected so as to face a flange part 131a; and a valve mechanism 150 which allows the variable pressure chamber R2 to communicate with the negative pressure chamber R1 and the atmosphere and blocks communication therebetween. The negative pressure type booster 100 includes a cushioning member 170 which is disposed between a flange side facing surface 131a of the flange part 131a and a plate side facing surface 121a of the plate member 121, protrudes from the side of the plate side facing surface 121a to the side of the flange side facing surface 131a1, and contacts with the flange side facing surface 131a1 to elastically deform.SELECTED DRAWING: Figure 2
【課題】作動時における応答性を阻害することなく振動や異音を効果的に抑制することができる負圧式倍力装置を提供すること。【解決手段】負圧式倍力装置100は、ブースタシェル110と、ブースタシェル110を負圧室R1と変圧室R2とに気密的に区画するプレート部材121及びダイアフラム122とからなる可動隔壁120と、可動隔壁120がフランジ部131aと対向するように連結されたバルブボディ130と、変圧室R2を負圧室R1及び大気に連通又は遮断する弁機構150と、を備える。負圧式倍力装置100は、フランジ部131aのフランジ側対向面131a1とプレート部材121のプレート側対向面121aとの間に配設されて、プレート側対向面121aの側からフランジ側対向面131a1の側に向けて突出し、フランジ側対向面131a1に当接して弾性変形可能な緩衝部材170を備える。【選択図】図2
NEGATIVE PRESSURE TYPE BOOSTER
負圧式倍力装置
2019-01-10
Patent
Elektronische Ressource
Japanisch