Active vibration damper, usable in a plurality of orientations

Patent metadata

Field	Value
Publication number	US-11268587-B2
Application number	US-201917286251-A
Country	US
Kind code	B2
Filing date	Sep 18, 2019
Priority date	Oct 18, 2018
Publication date	Mar 8, 2022
Grant date	Mar 8, 2022

Abstract

An active vibration damper includes a lower outer wall for placement on a floor, and front and rear outer walls, with the front and/or rear outer wall including first and second receptacles in an outer side thereof. The first receptacle receives a permanent magnet and is pot-shaped to maintain a closed configuration of the front and/or rear outer wall. A primary part of an electrical linear actuator is fixed at least on an inside of the lower outer wall, and a secondary part is arranged above the primary part and acted upon by the primary part. Retaining elements fixed to an inside of the upper outer wall movably hold the secondary part for displacement in a substantially linear manner in a left-right direction when the primary part is correspondingly impinged on. A magnetic back iron yoke is received in the second receptacle at the height of the secondary part.

First claim

What is claimed is:

1. An active vibration damper, comprising:
a substantially cuboid housing having a lower outer wall for placement on a floor, an upper outer wall, a front outer wall, a rear outer wall, a left outer wall, and a right outer wall, with at least one of the front and rear outer walls including first and second receptacles in an outer side of the at least one of the front and rear outer walls, with the first receptacle having a pot-shaped configuration such that the at least one of the front and rear outer walls maintains a closed configuration despite the presence of the first receptacle;
an electrical linear actuator including a primary part which is fixed at least on an inside of the lower outer wall, and a secondary part arranged above the primary part and acted upon by the primary part;
left and right retaining elements fixed to an inside of the upper outer wall and configured to movably hold the secondary part for displacement in a substantially linear manner in a left-right direction when the primary part is correspondingly impinged on;
a permanent magnet received in the first receptacle at a height of the secondary part;
a magnetic back iron yoke received in the second receptacle at the height of the secondary part.

2. The vibration damper of claim 1 , wherein the second receptacle for the back iron yoke, when viewed from inside out, is arranged outside the first receptacle for the permanent magnet.

3. The vibration damper of claim 1 , wherein the permanent magnet and the back iron yoke are received in the first and second receptacles of the at least one of the front and rear side walls such that a resulting magnetic field strength of a magnetic circuit formed by the secondary part, the permanent magnet and the back iron yoke is limited by the back iron yoke.

4. The vibration damper of claim 3 , wherein the back iron yoke has a region of reduced cross-section compared to a remaining region of the back iron yoke to limit the resulting magnetic field strength.

Assignees

• Siemens Ag

Inventors

• Bretschneider Jochen
• Fritsch Christoph
• Schür Torsten
• Stoiber Dietmar

Classifications

• F16F7/116

  on metal springs · CPC title

• F16F7/1011 Primary

  by electromagnetic means · CPC title

• F16F2222/08

  Inertia · CPC title