Dynamic damper

Abstract

The invention provides a dynamic damper. The pressure in a closed space surrounded by the hub, the vibrating ring, and the elastic body does not rise, and thus assembly can be easily performed. In addition, even if the elastic body generates heat due to resonance of the elastic body and the vibration ring, the pressure of the closed space does not rise, and therefore the protruding part plays a stable stopper function. The dynamic damper includes a hub, a vibrating ring, a pair of elastic bodies, a bearing, and a sleeve. The vibrating ring is arranged on the outer peripheral side of the hub and is provided with a vibrating ring main body and a convex part; the elastic body is provided with a bent part which is configured to clamp the convex part from the two axial sides of the vibrating ring and is bent towards the axial outer side, and the protruding part protruding towards the convex part; the sleeve is disposed between and fixed to the end of the bent portion and the hub. Also included is a path connecting the closed space and the outside such that the pressure within the closed space surrounded by the hub, the convex part, and the inner surface of the elastic body does not rise.

Description

technical field [0001] The present invention relates to a dynamic damper for absorbing torsional vibration generated in a rotary drive system such as a propeller shaft of an internal combustion engine. Dynamic dampers are also sometimes called shock absorbers. Background technique [0002] A rear-wheel drive or four-wheel drive vehicle includes a propeller shaft for transmitting the output of an internal combustion engine mounted on the front of the vehicle to the rear wheels. [0003] Since the vibration generated on the propeller shaft has a great influence on the vibration of the vehicle, a dynamic damper is installed on the propeller shaft to attenuate the vibration. [0004] The dynamic damper includes a hub, a vibrating ring located on the outer peripheral side of the hub, and an elastic body connecting the hub and the vibrating ring. The vibrating ring resonates with the elastic body to cancel the vibration when the propeller shaft rotates, whereby the vibration in ...

AI Technical Summary

Problems solved by technology

However, in that case, the radial space of the dynamic damper will expand

In addition, if a stopper is provided to limit the relative displacement of the vibrating ring, the torsional load applied to the elastic body can be prevented, but the installation of the stopper will lead to a corresponding increase in the number of parts.

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