| 摘要 |
PROBLEM TO BE SOLVED: To provide a dynamic damper capable of sufficiently suppressing input of a plurality of vibrations different in frequency, in spite of compact construction permitting a reduction in spring constant. SOLUTION: The dynamic damper comprises a mass member 1 and a pair of fixed portions 2, 3 for supporting the mass member 1 at both sides. A first rubber elastic body 4 is held between one fixed portion 2 and one end 1A of the mass member 1 and a second rubber elastic body 5 is held between the other fixed portion 3 and the other end 1B of the mass member 1 to form a plurality of pairs of elastic connection portions 7, 8 (9, 10). Among the plurality of pairs of elastic connection portions 7, 8, 9, 10, at least the pair of elastic connection portions 9, 10 have through-holes 11, 12, respectively, to reduce their spring constants. The plurality of pairs of elastic connection portions 7, 8, 9, 10 have the spring constants differentiated every pair. COPYRIGHT: (C)2005,JPO&NCIPI
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