| 摘要 |
PROBLEM TO BE SOLVED: To provide a dynamic damper in which a spring ratio of a high spring part and a low spring part of an elastic support member can be tuned in a wider range. SOLUTION: On both of shaft end parts of a mass member 2 positioned between a pair of fixed members 1 and coaxially arranged outside a rotary shaft at a distance, a recessed end face 23 recessed inward in an axial direction and a convex end face 24 positioned outer than the recessed end face 23 in the axial direction are alternately provided in the circumferential direction. A pair of ring-shaped elastic support members 3 which are respectively connected with each shaft end part of the mass member 2 and each fixed member 1 and elastically support the both of the shaft end parts in the direction of shearing are constituted so that the high spring part 31 one end of which is connected to the convex end face 24, having a spring constant in the shearing direction set higher than an objective specific value and the low spring part 32 the one end of which is connected to the recessed end face 23, having the spring constant in the shearing direction set lower than the specific value are alternately arranged in the circumferential direction. COPYRIGHT: (C)2004,JPO
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