Device for the purpose of influencing the transfer of vibration between two units

Patent metadata

Field	Value
Publication number	US-9644698-B2
Application number	US-201313789910-A
Country	US
Kind code	B2
Filing date	Mar 8, 2013
Priority date	Mar 9, 2012
Publication date	May 9, 2017
Grant date	May 9, 2017

Abstract

The invention is a device for influencing transfer of vibration between two units, one is mounted so that it can vibrate and the other is mounted to be damped. A parallel circuit is connected indirectly or directly with both units, which comprises at least one elastically deformable element, with an associated first force path and at least one force generator, providing a second force path, oriented parallel to the first force path and associated with a lever, connected indirectly or directly with the one unit, which lever at one end is rotated about a first axis of rotation oriented orthogonally to both force paths.

First claim

The invention claimed is:

1. A device for influencing vibrations in a system including a first unit mounted to vibrate and a second unit mounted to be damped, the device comprising:
a parallel circuit for direct or indirect attachment between the first unit and the second unit, the parallel circuit including a first force path through which a first force path acts and a second force path in parallel with the first force path through which a second force path acts, at least one elastically deformable element located in the first force path, at least one force generator located in the second force path including a lever having a first end and a second end, a first rotary bearing rotatably mounting the lever at the first end thereof about a first axis of rotation which is oriented orthogonally to both the first force path and the second force path, a second rotary bearing rotatably mounting the lever about a second axis of rotation which is oriented parallel to the first axis of rotation and the first axis of rotation and the second axis of rotation are spaced apart, a mass located at the second end of the lever which is mounted to vibrate, a first attachment for attaching the second rotary bearing to the first unit, a second attachment for attaching the first rotary bearing to the second unit, at least one of the first attachment and the second attachment upon attachment to the first and second units are linearly moveable relative to the first and second units by at least one actively controllable element which changes a moment of inertia of an end of the lever by altering a distance between the first axis of rotation and the second axis of rotation by altering a location of one of the first axis of rotation and the second axis of rotation relative to one of the first unit and the second unit.

2. The device in accordance with claim 1 , wherein the at least one actively controllable element comprises a spindle driven by an electric motor.

3. The device in accordance with claim 1 , wherein the at least one actively controllable element comprises a transducer material selected from the group: piezoelectric, magnetostrictive and shape memory materials.

4. The device in accordance with claim 1 , comprising:
at least one sensor of at least one state of vibration at an end of the lever which carries the mass and relative movements between the first unit that is mounted to vibrate with the at least one sensor generating a sensor signal and an evaluation unit, which in response to said sensor signal, generates a control signal for controlling the at least one actively controllable element.

5. The device according to claim 1 , wherein the first unit is at least one motor.

6. The device according to claim 1 , wherein the first unit is a motor of a vehicle.

7. The device according to claim 1 , wherein the first unit is sensitive to vibrations and the second unit is a support structure for the first unit.

8. The device according to claim 1 , wherein the at least one force generator includes a bearing for coupling at least one of vibrations and moments of forces triggering vibration into the first unit and the second unit is anchored.

9. The device in accordance with claim 1 , wherein:
the at least one actively controllable element either damps, provides active elimination of damping, or an adjustable natural frequency of an active isolation system.

Assignees

• Fraunhofer Ges Forschung
• Fraunhofer-Gesellschaft Zur Forderlung Der Angewandten Forschung E V
• Hochschule Darmstadt Univ Of Applied Sciences

Inventors

• Bueter Andreas
• Janssen Enrico
• Gaisbauer Samuel

Classifications

• F16F7/1022

  the linear oscillation movement being converted into a rotational movement of the inertia member, e.g. using a pivoted mass · CPC title

• F16F7/1005 Primary

  characterised by active control of the mass · CPC title

• F16F7/116

  on metal springs · CPC title