Vibration isolator

Details Vibration isolator Vibration isolator

1985-08-02

1986-10-28

Reger, Duane A.

Brakes

Inertia of damping mass dissipates motion

Resiliently supported damping mass

244 1727, 248559, 267160, 416500, F16F 710

Patent

active

046193499

ABSTRACT:
A vibration isolator (1) with two degrees of freedom works according to the nti-resonance principle. The vibration isolator is arranged, for example, between a first body, such as a helicopter frame 13, and a second vibration generating body such as a rotor-transmission unit 12 vibrating at a predominant frequency. A spring arrangement (2) is connected to the attachment points (14, 15) for the first and second bodies. The spring arrangement works in conjunction with a pendulum rod (3) which is attached to the two bodies (12, 13) by spherical pivot bearings (5, 10). The vibration isolator has a compact construction and a low characteristic damping since the spring arrangement includes several relatively small semi-circular or spiral-shaped wound leaf springs (7-1 to 7-4) which extend between an inner ring (4) and an outer ring (6). The pendulum rod is held in a spherical pivot bearing (5) in the inner ring, and a further spherical pivot bearing (10) is connected by a flange (9) to the outer ring. A pendulum weight (11) is slidably mounted on the free end of the pendulum rod. The other end of the pendulum rod is held by the two pivot bearings.

REFERENCES:
patent: 3317166 (1967-05-01), Janssen
patent: 3502290 (1970-03-01), Legrand et al.
patent: 4405101 (1983-09-01), Carlson et al.

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