JPS5848427Y2 - Vibration isolator - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a vibration isolator, and more particularly to a vibration isolator equipped with a coil spring.

Conventionally, as this type of vibration isolating device, there is one in which a cap-shaped upper cover and a lower cover are fitted to the upper and lower ends of a coil spring, respectively.

Such conventional vibration isolators have good vibration isolation effects against relatively low-frequency vibrations, but have poor damping effects against high-frequency vibrations, and have poor damping effects against horizontal vibrations. The drawback was that most of them did not have a vibration damping function.

The present invention has been made in order to eliminate the above-mentioned drawbacks, and an object of the present invention is to provide a vibration isolating device that has a good damping effect against relatively high frequency vibrations and rolling motions.

Hereinafter, the present invention will be explained with reference to the illustrated embodiments.

The drawings show an embodiment of the invention.

In the figure, a coil spring 1 is covered by a cap-shaped upper cover 2 and a lower cover 3 that are fitted from the upper and lower ends.

The ends 4.degree.5 of the upper cover 2 and the lower cover 3 are slidably overlapped.

A wear-resistant rubber layer 6 such as a urethane rubber layer is provided on the outer periphery of the wire of the coil spring 1.

In addition, a wear-resistant rubber layer 7 such as a urethane rubber layer is provided on the opposing surfaces of the ends 4 and 5 of the upper cover 2 and the lower cover 3, and on the opposing surfaces of the outer surface of the coil spring 1 and the inner surface of the lower cover end 5.
, 8.9 are provided, respectively.

. The outer periphery of the coil spring 1 and the inner surface of one end 5 of the lower cover, the outer surface of the same end 5 and the inner surface of one end 4 of the upper cover are slidable through wear-resistant rubber layers 6, 7, 8.9, respectively. is in contact with

Stoppers 10 and 11 are provided on the inner surface of one end 4 of the upper cover and the outer surface of one end 5 of the lower cover, projecting in the radial direction at appropriate intervals and locking each other.

These stoppers 10.11 prevent the upper cover 2 and lower cover 3 from coming off.

The lower cover 3 is fixed onto the substrate 12.

The board 12 has mounting holes 1 for mounting on the floor etc. to be installed.
3 and a rubber plate 1 to prevent direct contact with the floor etc.
4.15 is attached.

Inside the coil spring 1, an elastic rod 16 having a wear-resistant rubber layer such as urethane rubber 0 on the outer circumferential surface is disposed so as to be inscribed in the coil spring 1.

The elastic rod 16 is fixed to the inner bottom of the lower cover 3 by suitable means.

In addition, numeral 17 in the figure indicates a leveling bolt for mounting.

When the vibration isolating device having the above structure is used, the substrate 12 is placed on a predetermined floor surface or the like, and the equipment to be vibration-isolated is mounted on the upper cover 2 using the leveling bolts 17.

As described above, according to the vibration isolating device according to the present invention, a wear-resistant rubber layer is provided on each end of the two upper and lower camp-shaped covers and on each opposing surface between the covers and the coil spring. Vibrations between the cap-shaped covers are attenuated by the elasticity of the coil springs and the friction between the wear-resistant rubber layers provided on each sliding surface, so not only low-frequency vibrations but also high-frequency vibrations are efficiently damped. The effect of being able to prevent vibrations can be obtained.

If the wear-resistant rubber layer is made of a material with good wear resistance and a small spring constant, such as urethane rubber, a large damping effect can be obtained due to the friction between the wear-resistant rubber layers. It will be done.

[Brief explanation of drawings]

The drawing is a sectional view showing an embodiment of the present invention. 1...Coil spring, 2...Top cover,
3...Lower cover, 6, 7, 8.9...
Abrasion-resistant rubber layer.

Claims (1)

[Scope of utility model registration request] 1. In a vibration isolating device comprising a coil spring and two cap-shaped covers that are respectively fitted from both ends of the coil spring and one end of each is slidably overlapped, one end of each of the two cap-shaped covers overlaps. A vibration isolating device characterized in that a wear-resistant rubber layer is provided on the facing surface of the part and the facing surface of the cover and the coil spring. 2. The vibration isolating device according to claim 1, wherein a wear-resistant rubber layer is provided on the outer periphery of the wire of the coil spring.