| 摘要 |
This invention provides a switching type liquid-in vibration isolating device capable of opening/closing an orifice by changing over between the atmospheric and negative pressure in a switching chamber corresponding to shake and idle vibration, respectively. In order to prevent a pipe, for introducing the atmospheric and negative pressure in the switching chamber, from disconnecting, a first and a second fitting 1, 2 are connected by a vibration isolating substrate 3, a partition member 4, a first and a second diaphragm 5, 6 are disposed within a hollow space thereof, a main liquid chamber 7 and a sub-liquid chamber 8 are interconnected by two inside and outside orifices 12, 13, a equilibrium chamber 9 is formed between the first and second diaphragm 5, 6, a switching chamber 10 is formed between the second diaphragm 6 and the second fitting 2, the center portion of the bottom wall 22 of the second fitting 2 is depressed toward the switching chamber 10, a pipe 11 is pierced into the top 25a of the depressed portion 25 and received in the depressed portion 25, and a plurality of convex portions 29 for interference prevention are outwardly projectively provided on the bottom wall 22 around the depressed portion 25.
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