Vibration-damping device

Abstract

A vibration-damping device 20 includes crank members 22 that are linked to a driven member 15 via first linking shafts A1 and that are capable of swinging about the first linking shafts A1 along withthe rotation of the driven member 15, and an inertial mass body 24 that is linked to the driven member 15 via the crank members 22 and connecting rods 23 and that swings around a rotational center RCin tandem with the crank members 22 along with the rotation of the driven member 15. As part of the centrifugal force acting on the crank members 22 along with the rotation of the driven member 15, certain force components, which act in a direction orthogonal to a direction leading from the center of a first linking shaft A1 to a center of gravity G, constantly act on the crank members 22 as return force for returning the inertial mass body 24 to the center of the range of swinging, and these force components reach a maximum when the inertial mass body 24 is positioned in the center of the range of swinging.

Description

technical field [0001] The present invention relates to a vibration damping device for damping vibration of a rotating member. Background technique [0002] Conventionally, there is known a shock absorber comprising: a link mechanism having a first connecting rod as a crank member connected to a crankshaft and a second connecting rod as a connecting rod connected to the first connecting rod; The connecting rods are connected to the crankshaft via the link mechanism to form an annular inertial body capable of relative rotation by a predetermined angle (for example, refer to Patent Document 1). In this shock absorber, the connecting point between the crankshaft and the first connecting rod is separated in the circumferential direction from the connecting point between the inertial body and the second connecting rod, and a mass body is formed on the first connecting rod. When the crankshaft rotates, the first link and the second link of the link mechanism are intended to be ke...

AI Technical Summary

Problems solved by technology

However, in the shock absorber described in Patent Document 1, the component of the centrifugal force is zero at the center of the swing range (see Figure 11 dotted line), so it is difficult to sufficiently ensure the above restoring force over the entire swing range

In addition, in the above-mentioned shock absorber, if the weight of the first link (crank member) and the inertial body are increased in order to increase the restoring force, the overall weight of the shock absorber will increase and the size will increase.

In addition, in the above-mentioned damper, if the weight of the first link cannot be increased due to weight and size constraints, the target vibration cannot be attenuated.

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