Vibration damping device

Abstract

This vibration damping device includes: a supporting member which rotates integrally with rotating elements; restoring force generation members which are rotatably connected to the supporting member with first connecting shafts interposed therebetween; an inertia mass body which is rotatable about the center of rotation of the rotating elements; second connecting shafts which are each supported byone of the corresponding restoring force generation member and the inertia mass body, and connects the restoring force generation member and the inertia mass body in a relative rotatable manner; andguide portions which are each formed on the other side of the corresponding restoring force generation member and the inertia mass body, and guides the corresponding second connecting shaft. With therotation of the supporting member, each of the second connecting shafts rocks about the corresponding first connecting shaft while maintaining the center distance to the first connecting shaft constant, and rocks about a virtual shaft while maintaining the center distance to the virtual shaft constant, the virtual shaft being set so that the relative position with respect to the inertia mass bodyis invariant.

Description

technical field [0001] The disclosed invention relates to a vibration damping device that damps vibration of a rotating member. Background technique [0002] Conventionally, a shock absorber is known, which includes: a link mechanism including a first link as a crank member connected to a crankshaft and a second link as a connecting rod connected to the first link; The inertial body is connected to the second connecting rod and connected so as to be rotatable relative to the crankshaft at a predetermined angle via the link mechanism (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. In addition, when the crankshaft rotates, the first link and the second link of the link mechanism tend to maintain a state o...

AI Technical Summary

Problems solved by technology

Therefore, when the weight (moment of inertia) of the connecting rod is increased to ensure strength and durability, the component force of the centrifugal force acting on the crank member is also used to return the connecting rod to a position in a balanced state. If the centrifugal force of the crank member, that is, the weight of the crank member is greatly increased, there is a concern that the vibration damping performance of the shock absorber will be reduced.

In addition, in the damper device described in Patent Document 2, there is an inflection point (position where the curvature changes) on the inner surface of the arcuate groove of the guide roller, so when the roller passes through the inflection point, the contact between the roller and the inner surface of the arcuate groove The position changes irregularly, and there is a possibility that the roller may slip or bounce

Moreover, if such sliding and bouncing of the rollers occurs, the vibration damping performance of the damper device will be reduced.

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