Vibration-compensating mount assembly

• US 5,529,295 A
• Filed: 11/18/1994
• Issued: 06/25/1996
• Est. Priority Date: 11/24/1993
• Status: Expired due to Fees

• Current Assignee: Firma Carl Freudenberg
• Original Assignee: Firma Carl Feudenberg
• Inventors: Feurer, Georg, Leibach, Markus
• Primary Examiner(s): Graham, Matthew C.
• Application Number:
  US08/342,410
• Time in Patent Office: 585 Days
• Field of Search: 188/267, 188/378, 188/379, 188/380, 248/636, 267/140.14, 267/140.15, 267/140.13
• US Class Current: 267/140.15
• CPC Class Codes: F16F 7/1011 by electromagnetic means

Abstract

An active, vibration-countering mount assembly for a vibrating component is disclosed. The mount assembly comprises a supported mount supported on a machine element, a supporting mount supported via a spring element on the supported mount, and an inertial mass, movable back and forth by means of a drive parallel to the direction of the vibrations introduced by the vibrating component. The inertial mass is joined to the supported mount by a spring such that the inertial mass and the spring are not contacted by a liquid.

Claims

1. A mount assembly for a vibrating component, comprising:

a support mount configured for attachment to a machine element, said support mount being configured to oscillate along a preferred axis;

a supporting mount configured to be rigidly connected to the machine element;

a spring element having first and second sides, said spring element being attached along one of its sides to the supporting mount;

an inertial mass attached along the other side of spring element and being linked to the supporting mount in a manner that permits the oscillatory motion of the inertial mass with respect to the supporting mount along the preferred axis of vibration of the support mount; and

an actuator that comprises a magnet and a coil spaced apart from one another for enabling the controlled oscillatory movement of the inertial mass with respect to the supporting mount, wherein the magnetic field provided by the actuator is oriented so as not to exert a preload on the spring element along the preferred axis of vibration;

wherein the inertial mass and the spring are not contacted by a liquid.

2. A mount assembly according to claim 1, wherein the ratio of the respective sizes of the inertial mass to the vibrating component is between 1:

100 and 1;

1000.

3. A mount assembly according to claim 1, wherein the inertial mass is housed separately from the spring.

4. A mount assembly according to claim 2, wherein the inertial mass is housed separately from the spring.

5. A mount assembly according to claim 3, wherein the machine element has first and second sides, the support mount is attached to a first of these two sides, and the housing of the inertial mass is operatively connected to the opposite side of the machine element.

6. A mount assembly according to claim 1, wherein the inertial mass comprises the magnet and a housing for the magnet.

7. A mount assembly according to claim 1, wherein the coil of the actuator is fixedly secured to the supporting mount.

8. A mount assembly according to claim 5, wherein the coil of the actuator is fixedly secured to the supporting mount.

9. A mount assembly according to claim 6, wherein the coil of the actuator is fixedly secured to the supporting mount.

10. A mount assembly for a vibrating component, comprising:

a support mount having a first end and a second end, said support mount being connected at its first end to the vibrating component;

a vibration canceling assembly operatively connected to the second end of the support mount, said vibration canceling assembly comprising a support plate rigidly attached to the support mount, a coil rigidly attached to the support plate, a spring attached at one end to the periphery of the support plate, and an inertial mass connected to the other end of the spring, said inertial mass comprising an annular magnet concentric with the coil, and;

an actuator for energizing the coil in a selective manner so as to create a vibratory motion of the inertial mass with respect to the coil that runs counter to the vibrations of the vibrating component;

wherein the magnetic field provided by the magnet with respect to the coil when the coil is not energized is oriented so as not to exert a preload on the spring.

11. A mount assembly as set forth in claim 10, wherein the support mount comprises an elastic member.

12. A mount assembly as set forth in claim 10, wherein the inertial mass further comprises a housing for the magnet.

13. A mount assembly as set forth in claim 12, wherein the housing of the magnet circumferentially surrounds the magnet on both inner and outer radial surfaces.

14. A mount assembly as set forth in claim 13, further comprising an axially extending projection extending through the center of the coil so as to provide support for the inertial mass against excessive radial movements.

15. A mount assembly as set forth in claim 12, wherein the housing is attached to the spring via an annular ring with respect to which the housing is capable of axial movement.

16. A mount assembly as set forth in claim 15, further comprising an anti-friction coating between the annular ring and the housing of the inertial mass.