JP2552801Y2 - Dynamic damper device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dynamic damper device. More specifically, the present invention relates to a dynamic damper device. The present invention relates to a dynamic damper device to be used.

[0002]

2. Description of the Related Art FIGS. 8 and 9 show general dynamic damper structures each using a rubber elastic body. In these figures, the first member 1 and the second member 2 have a relationship between a base member and a mass member connected thereto, and a rubber elastic body 3 is interposed therebetween. The rubber elastic body 3 is directly adhered to the second member 2, but is interposed with the first member 1 via a fixing plate member 4. In FIG. 8, the first member 1 and the second member 2 are connected in a vertical relationship, and in FIG. 9, they are connected to each other in the horizontal direction.

In these dynamic dampers, a first member 1 forms a main vibration system, and a second member 2 and a rubber elastic body 3 form a dynamic vibration system. (Hereinafter, referred to as main vibration) is damped and absorbed by the second member 2 being dynamically vibrated with respect to the first member 1 via the rubber elastic body 3. That is, the dynamic vibration of the second member 2 has a certain specific vibration frequency determined by its mass and the spring constant of the rubber elastic body 3, but this frequency is different from the main vibration frequency of the first member 1. The vibration of the first and second members 1 and 2 interferes with each other, and the vibration of the first member 1 is suppressed.

[0004] In the case of the dynamic damper having the above-described structure, the dynamic vibration of the second member 2 and the rubber elastic body 3 effectively acts on the vibration damping of the first member 1 because of the rubber elastic body 3.
Only in the tuned direction. That is, assuming a case where the main vibration of the first member 1 is accompanied by a resonance phenomenon with the second member 2 in one direction at a specific frequency, the damping action is particularly exerted on the resonance direction so that the main member 1 vibrates in the resonance direction. The spring constant of the rubber elastic body 3 is tuned. In FIG. 8, the first member 1 and the second member 2 are in a vertical positional relationship, and the resonance direction is the compression / tensile direction A of the rubber elastic body 3, which coincides with the vertical direction. Tuning in the compression and tension directions is sufficiently performed. In FIG. 9, the first member 1 and the second member 2 are in a horizontal positional relationship,
Since the resonance direction is the shearing direction B of the rubber elastic body 3, which coincides with the direction of the parallel movement, the tuning of the shearing direction is sufficiently performed.

[0005]

However, the conventional dynamic damper device has a drawback that the main vibration cannot be reliably absorbed when there are two resonance directions. That is, for example, in FIG. 8, the main vibration of the first member 1 is different from the direction of the linear vibration component (referred to as one-dimensional linear vibration) that coincides with the compression / tensile direction A, and the rotation direction C having the same direction A as an axis. Is accompanied by the same frequency resonance phenomenon,
The vibration component in the rotation direction C cannot be damped at the same ratio as that in the compression and tension direction A. Similarly, in the case of FIG. 9 as well, when there is a resonance phenomenon of the same frequency in the rotation direction C sharing the shear direction B in addition to the one-dimensional linear vibration coincident with the shear direction B, the vibration component in the rotation direction C is changed to the shear direction. It cannot be absorbed at the same rate as B.

Conventionally, for a main vibration system having two resonance directions as described above, the tuning of the rubber elastic body 3 is complicated, so that the rubber elastic bodies tuned in each direction are used. Was. Accordingly, an object of the present invention is to provide a dynamic damper device capable of equally damping a two-dimensional vibration of a one-dimensional linear vibration and a rotational vibration each accompanied by a resonance phenomenon without performing complicated tuning.

[0007]

SUMMARY OF THE INVENTION The present invention provides a one-dimensional linear vibration.
Motion and rotational vibration about the axis of the one-dimensional linear vibration direction
And a base member to be damped, which constitutes a dynamic vibration system having a resonance direction, and a base member which is disposed opposite to the base member in the one-dimensional linear vibration direction to form a dynamic vibration system. Mass member, and a rubber elastic body interposed between the base member and the mass member, the rubber elastic body having at least two support portions tilted symmetrically about the axis of the rotational center of the rotational vibration. It is characterized by having done.

As a preferred embodiment of the present invention, in the case of one rubber elastic body, for example, a parallelepiped rubber elastic body is used.
At least one pair of opposing side surfaces of the side surfaces is formed in a spirally twisted shape.

[0009]

The rubber elastic body having the above-described structure is composed of a base member and a mass member.
At least tilted symmetrically about the axis connecting
Because it has two supports , for example, the main vibration of the base member is
Besides compression pulling direction which coincides with one-dimensional linear vibration component of the rubber elastic body, if having a vibration component with a resonance phenomenon of the same frequency in the rotational direction of the shaft to the same direction as the axis, the compression of the rubber elastic body tensile If a damper action in the direction occurs, a damper action also occurs in the rotation direction at the same time. Since the vibration damping frequencies of the damper action in such two-dimensional directions occurring at the same time are substantially the same, it is possible to reliably suppress the main vibration composed of the one-dimensional linear vibration and the rotational vibration at the same frequency.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings shown in FIGS. 1 to 3 show a first embodiment of a dynamic damper device according to the present invention, FIG.
FIG. 2 is a side view of FIG. 1 as viewed from one of left and right, and FIG. 3 is a plan view of the mass member. In these figures, a dynamic damper device comprises a fixing plate member 13 and a mass member 12 attached to a base member 11 to be damped by means of adhesion or the like, and the fixing plate member 1.
3 and a pair of rubber elastic bodies 14 and 15 interposed between the mass member 12.

The rubber elastic bodies 14 and 1 serving as the support portions of the present invention are provided.
Numeral 5 is a parallelepiped, and two opposing surfaces are respectively bonded to the fixing plate 13 and the mass member 12 by, for example, vulcanization, and four side surfaces are a pair of opposing two surfaces 14a, 14b, 15a. , 15b are slopes. The directions of the slopes are opposite to each other, as is apparent from FIGS. That is, rubber bullets
The bodies 14 and 15 connect the base member 11 and the mass member 12.
Axis (for example, the facing direction of the base member 11 and the mass member 12)
(A virtual axis) and twisted symmetrically around the center
ing.

In the dynamic damper having such a configuration, for example , the one-dimensional direction A in which the mass member 12 is opposed to the base member 11 in the direction A in which the mass member 12 faces the base member 11 and the mass member 12.
Consider the case of having only linear vibration. In this case, the rubber elastic bodies 14 and 15 move in the rotation direction E with the facing direction A as the axis.
Since it is tilted in a torsional symmetry, if a damper action in the compression and tension direction corresponding to the one-dimensional linear vibration occurs, a damper action in the shear direction D is forcibly generated in the rubber elastic bodies 14 and 15. The damper action in the shearing direction D is performed during the period in which the mass member 12 is displaced in the direction approaching the base member 11 in the direction D in FIG. 1 (the direction in which the parallelepiped is further obliquely deformed) in the D direction. During the period in which the mass member 12 is displaced in the direction away from the base member 11 by deforming the rubber elastic members 14 and 15 in the right direction in FIG. 1 (the direction in which the parallelepiped is corrected to the regular hexahedron) in the D direction. Fifteen
To transform. The deformation of the rubber elastic bodies 14 and 15 in the shearing direction D is a torsional deformation centered on the axis in the opposite direction A in opposite directions as shown in FIG. As shown in FIG. 3, a force is applied in the rotation direction E.

However, the damper action of the rubber elastic bodies 14 and 15 is the same frequency since they are deformations occurring simultaneously. Therefore, when the base member 11 is a system having a one-dimensional linear vibration in the direction A and a resonance phenomenon at the same frequency in the rotational direction E about the same direction A as an axis, the vibrations in both directions are equally controlled. Can be. Thus, according to the present invention, the damping action in the rotational direction about the same direction as the compression and tension direction of the rubber elastic bodies 14 and 15 is simultaneously generated at the same frequency, thereby suppressing the vibrations accompanied by the resonance phenomenon in these two directions. It can be done reliably.

In the above embodiment, the basic member 11
And the mass member 12 have a one-dimensional linear vibration parallel to each other in a parallel direction B (see FIG. 1), and also have a vibration in the rotation direction E sharing the same direction B. Similarly, by the damper action in parallel and opposite directions,
It is capable of damping vibrations in the direction B and the rotation direction E. In the above embodiment, the rubber elastic bodies 14 and 15 may have a structure in which the fixing plate 13 is closed and the mass member 12 is open.

FIGS. 4 and 5 are a side view and a perspective view for explaining the second embodiment. In this embodiment, as shown in FIG. 5, for example, a rubber elastic body 16 having a rectangular shape is formed into a shape twisted by 90 ° about one axis. With such a configuration, as in the embodiment of FIG.
2 can be surely damped in a vibration system having a vibration in one direction A in which the distance 2 is near and a vibration in a rotation direction E about the same direction A as an axis. The same applies to a vibration system in which the base member 11 and the mass member 12 have a one-dimensional linear vibration in the parallel direction B and also have a vibration in the rotation direction E sharing the same direction B.

FIGS. 6 and 7 show a third embodiment of the present invention. FIG. 6 is a plan view seen from the mass member side, and FIG. 7 is a side view. In this embodiment, a rubber elastic body 1 as shown in FIG.
7, 17,... Are arranged so that a plurality (four in the figure) are arranged on the same circumference. However, the torsion angle in this case is not 90 °, and for example, the total of the four is 90 ° or 180 °.
°.

This also realizes the same damper function as the above embodiments. In each of the embodiments, only the individual rubber elastic bodies may be prepared first and fixed to the fixing plate 13 and the mass member 12 with an adhesive, respectively, or as in the first embodiment. If the configuration is simple, it may be manufactured by molding.

[0018]

As described above, according to the present invention, a two-dimensional vibration accompanied by a resonance phenomenon in both the one-dimensional linear vibration and the rotational vibration can be surely performed without complicated tuning of the rubber elastic body. Can be damped.

[Brief description of the drawings]

FIG. 1 is a side view showing a first embodiment of a dynamic damper device according to the present invention;

FIG. 2 is a side view of FIG.

FIG. 3 is a plan view of FIG. 1 as viewed from a mass member;

FIG. 4 is a side view showing a second embodiment of the present invention;

FIG. 5 is a perspective view of a rubber elastic body used in the second embodiment,

FIG. 6 is a top view showing a third embodiment of the present invention;

FIG. 7 is a side view of the third embodiment,

FIG. 8 is a configuration diagram showing an example of a conventional dynamic damper device;

FIG. 9 is a configuration diagram showing another conventional example.

[Explanation of symbols]

11 is a base member, 12 is a mass member, and 13 is a fixing plate.
G, 14, 15, 16, 17 are rubber elastic bodies.

Claims (1)

(57) [Scope of request for utility model registration] 1. One-dimensional linear vibration and one-dimensional linear vibration direction
And the base member to be damped which constitutes the axis <br/> dynamic vibration system having a resonance direction to both rotational vibration around the, the one
Disposed opposite to said base member in dimension linear vibration direction, and the mass member constituting the dynamic vibration system, is interposed between said base member and said mass member, during rotation of the rotational vibration
A rubber elastic body having at least two support portions tilted symmetrically about the axis of the core .