Damping of vibrations of a machine

Patent metadata

Field	Value
Publication number	US-10744608-B2
Application number	US-201716077792-A
Country	US
Kind code	B2
Filing date	Feb 16, 2017
Priority date	Feb 16, 2016
Publication date	Aug 18, 2020
Grant date	Aug 18, 2020

Abstract

A device for damping vibrations of a machine, in particular for damping vibrations of a machine tool, wherein the device includes a first linear motor primary part, a pendulum mass, mounted via at least one supporting sheet-metal assembly provide a relative motion of the pendulum mass along the first linear motor primary part, a first linear motor secondary part fastened to the pendulum mass such that the pendulum mass is actuated via the first linear motor primary part to dampen vibrations of the machine, a second linear motor primary part, and a second linear motor secondary part fastened to the pendulum mass such that the pendulum mass is additionally actuated via the second linear motor primary part to dampen vibrations of the machine so as to achieve an especially compact device that makes it possible to dampen vibrations of machines, in particular machine tools, effectively and without maintenance.

First claim

The invention claimed is:

1. A device for damping of vibrations of a machine, comprising:
a first linear motor primary part;
a pendulum mass mounted via at least one supporting sheet metal assembly such that a relative movement of the pendulum mass along the first linear motor primary part is performable;
a first linear motor secondary part fastened to the pendulum mass such that the pendulum mass is actuatable via the first linear motor primary part to damp vibrations of the machine;
a second linear motor primary part; and
a second linear motor secondary part fastened to the pendulum mass such that the pendulum mass is additionally is actuatable via the second linear motor primary part to dampen vibrations of the machine;
wherein the pendulum mass is arranged between the linear motor primary parts.

2. The device as claimed in claim 1 , further comprising:
a position detection system which detects a relative position of at least one linear motor secondary part in relation to a respective linear motor primary part.

3. The device as claimed in claim 2 , wherein the position detection system evaluates a magnetization of at least one of the linear motor secondary parts for position detection.

4. The device as claimed in claim 1 , wherein a first air gap between the first linear motor primary part and the first linear motor secondary part differs from a second air gap between the second linear motor primary part and the second linear motor secondary part.

5. The device as claimed in claim 2 , wherein a first air gap between the first linear motor primary part and the first linear motor secondary part differs from a second air gap between the second linear motor primary part and the second linear motor secondary part.

6. The device as claimed in claim 3 , wherein a first air gap between the first linear motor primary part and the first linear motor secondary part differs from a second air gap between the second linear motor primary part and the second linear motor secondary part.

7. The device as claimed in claim 4 , wherein the first air gap differs from the second air gap such that a force of attraction always acts against the supporting sheet metal assembly.

8. The device as claimed in claim 1 , further comprising:
a controller which actuates at least one of the linear motors such that the pendulum mass counteracts vibrations of the machine.

9. The device as claimed in claim 1 , further comprising:
at least one end position buffer.

10. The device as claimed in claim 1 , further comprising:
a guide facility configured to prevent contact between the linear motor parts.

11. The device as claimed in claim 1 , further comprising:
a casing;
wherein at least a part of the linear motor parts and the pendulum mass are arranged within the casing.

12. The device as claimed in claim 1 , wherein a maximum dimension of the device amounts to at most 1/10 th of a maximum dimension of the machine.

13. The device as claimed in claim 12 , wherein the maximum dimension of the device is between arrange of at least 20 cm and not more than 80 cm.

14. The device as claimed in claim 12 , wherein the maximum dimension of the device amounts to at most 1/10 th of a maximum dimension of a machine tool.

15. A machine tool having at least one tool and also the device for damping vibrations as claimed in claim 1 .

16. The device as claimed in claim 1 , wherein the device dampens vibrations of a machine tool.

Assignees

• Siemens Ag

Inventors

• Haschka Markus Stephan
• Schaefers Elmar
• Schuer Torsten
• Stoiber Dietmar

Classifications

• F16F1/26

  Attachments or mountings ({F16F1/182, F16F1/22} B60G11/10 take precedence) · CPC title

• F16F7/116

  on metal springs · CPC title

• B23Q11/0035 Primary

  by adding or adjusting a mass, e.g. counterweights · CPC title

• F16F2238/04

  Damper · CPC title

• F16F15/02

  Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems ({F16F15/005 takes precedence } ; layered products B32B; suppression of vibration in ships B63; {relieving load on bearings, using magnetic means F16C39/06}) · CPC title