| 摘要 |
PROBLEM TO BE SOLVED: To provide an air spring capable of effectively preventing the generation of a high frequency noise by fully making use of the original function in a throttle passage and further by restraining the generation of turbulence to the air flow moving there. SOLUTION: The air spring is composed of an upper face plate 1, a lower face plate 2 and a rubber bellows 3 pneumatically coupled together by each end part of these face plates, and is communicated with an auxiliary tank 8 through a communication passage 5 set up in the low face plate 2. The air spring also comprises a drawing member 22 separated from the low face plate 2 after being arranged inside the communication passage 5, a counter-boring part 12a provided in the upper face plate side of the drawing member 22, the narrowest part of a channel 24 provided in the auxiliary tank side of the drawing member 22 and a flow guide part 13 which is provided adjacent to both sides of the upper face plate side and the auxiliary tank side of the narrowest part of the channel 24 gradually narrows the channel to the narrowest part of the channel 24. The diameter of the narrowest part of the channel of the flow guide part 13 is 30% or more and 80% or less to the diameter of the most segregated end part from the narrowest part of the channel 24. COPYRIGHT: (C)2009,JPO&INPIT
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