LIQUID SEALED TYPE VIBRATION PROOF APPARATUS

摘要

PROBLEM TO BE SOLVED: To provide a liquid sealed type vibration proof apparatus in which its dynamic spring characteristics and attenuation characteristics are not drasti cally changed as a whole liquid sealed type vibration proof apparatus even if a vibration proof rubber body forming a main spring is cured by thermal deterioration. SOLUTION: This apparatus is provided with an insulator (a vibration proof rubber body) 5 between an upper link member 6 to be linked with an engine side and a lower ink member 9 linked with a vehicle body member, and a main chamber is which liquid (sealed liquid) 1 containing 2 to 10 pts.wt. of water (H2 O) is sealed and a subsidiary camber 3 are provided at a downward part of this insulator 5. An orifice 88 to flow the sealed liquid 1 is provided between the main chamber 2 and subsidiary chamber 3. The orifice 88 is annularly provided at a peripheral rim of a partition plate 8 for partitioning the main chamber 2 from the subsidiary chamber 3. An air chamber 7 into which air is introduced is provided at a downward part of the subsidiary chamber 3, and a diaphragm 4 for partitioning the air chamber 7 from the subsidiary chamber 3 is provided.