Vibration damper using shocklike interaction

• US 9,568,063 B2
• Filed: 12/13/2010
• Issued: 02/14/2017
• Est. Priority Date: 02/11/2010
• Status: Active Grant

• Current Assignee: Illinois Tool Works Inc.
• Original Assignee: Illinois Tool Works Inc.
• Inventors: Weiss, Oliver
• Primary Examiner(s): Lopez, Michelle
• Application Number:
  US13/576,771
• Publication Number:
  US 20120298392A1
• Time in Patent Office: 2,255 Days
• Field of Search: 173/162.1, 173/162.2, 173/170
• US Class Current: 1/1
• CPC Class Codes: F16F 7/10 using inertia effect F16F13/108, F16F13/22, F16F15/10, F16F15/22 take precedence; stabilising vehicle bodies by means of movable masses B62D37/04; protection of buildings against vibrations or shocks by mass dampers E04H9/0215; arrangements or devices for damping mechanical oscillations of power lines H02G7/14

Abstract

The invention relates to a vibration damper for a machine component which vibrates in the operating state thereof, wherein a damping mass arrangement is coupled to the machine component via a clearance and wherein the excitation of the damping mass arrangement in at least one vibration direction originates from a substantially shocklike interaction between the damping mass arrangement and the machine component. The invention leads to an increase in dampening efficiency due to the utilization of shock-like transfer of vibration energy.

Claims

1. A vibration damper for a machine component which vibrates in the operating state thereof, in particular for an impact drilling machine or the like, wherein a damping mass arrangement is provided, which damping mass arrangement, when the vibration damper is installed, is coupled to the machine component and is excited by the vibrations of the machine component via the coupling to provide damping vibrations, characterized in that the coupling between the damping mass arrangement and the machine component has such a clearance, at least in the operating state, that the excitation of the damping mass arrangement in at least one vibration direction originates from a substantially shocklike interaction between the damping mass arrangement and the machine component, wherein the coupling between the damping mass arrangement and the machine component does not have any clearance in the inoperative state, and wherein the clearance is formed only in the operating state by relaxation of the damping material.

2. The vibration damper as claimed in claim 1, wherein the vibrations of the machine component have a first vibration direction, and wherein the clearance is provided at least in the first vibration direction.

3. The vibration damper as claimed in claim 1, wherein the clearance is provided in at least two directions in space, and preferably in that the clearance is provided in all directions in space.

4. The vibration damper as claimed in claim 1, wherein an order of magnitude of the clearance lies in an order of magnitude of the amplitudes of the vibrations to be damped, and preferably in that the clearance is smaller than the maximum amplitude of the vibrations to be damped, or in that the clearance is smaller than the average amplitude of the vibrations to be damped.

5. The vibration damper as claimed in claim 1, wherein the coupling between the damping mass arrangement and the machine component does not have any clearance in the inoperative state, and wherein the clearance is formed only in the operating state, in particular by relaxation of the damping material.

6. The vibration damper as claimed in claim 1, wherein the damping mass arrangement is configured as a ball.

7. The vibration damper as claimed in claim 1, wherein the damping mass arrangement is part of a structural member arrangement, in particular of the handle arrangement of a machine component.

8. The vibration damper as claimed in claim 1, wherein the coupling between the damping mass arrangement and the machine component is such that a clearance is formed during an operation state, and a zero clearance is present in the inoperative state.

9. The vibration damper as claimed in claim 1, wherein the coupling between the damping mass arrangement and the machine component does not have any clearance in the inoperative state, and the clearance is formed only in the operating state.

10. The vibration damper as claimed in claim 1, wherein the vibration damper includes a housing encompassing the damping mass arrangement, wherein the housing shields the damping mass arrangement from non-vibrational loading.

11. The vibration damper as claimed in claim 1, wherein the vibration damper is configured so that when attached to the tool, the damping mass arrangement is isolated from structural loads.

12. The vibration damper as claimed in claim 1, wherein the vibration damper is a modular component configured for attachment to any other component at only one location.

13. The vibration damper as claimed in claim 1, wherein the vibration damper includes a first surface configured to directly contact a mating surface of the machine component, wherein the clearance is located between the first surface and the damping mass arrangement.

14. The vibration damper as claimed in claim 1, wherein the vibration damper includes a surface configured to directly contact a mating surface of the machine component, wherein the clearance extends to the damping mass arrangement in a direction normal to a tangent plane of the first surface.

15. A device, comprising,

a drilling machine including the vibration damper of claim 1, wherein:

the drilling machine is the impact drilling machine.

16. A vibration damper for a machine component which vibrates in the operating state thereof, in particular for an impact drilling machine or the like, wherein a damping mass arrangement is provided, which damping mass arrangement, when the vibration damper is installed, is coupled to the machine component and is excited by the vibrations of the machine component via the coupling to provide damping vibrations, characterized in that the coupling between the damping mass arrangement and the machine component has such a clearance, at least in the operating state, that the excitation of the damping mass arrangement in at least one vibration direction originates from a substantially shocklike interaction between the damping mass arrangement and the machine component, wherein an elastically deformable damping arrangement is provided, which damping arrangement can be deformed by the damping vibrations of the damping mass arrangement, and preferably in that the damping arrangement is assigned to machine-side clearance limits or to the damping mass arrangement, and furthermore preferably in that the damping material of the damping arrangement is composed of a flexible plastics material, and furthermore preferably of a foam material, wherein a support is provided for the damping mass arrangement, which support, when the vibration damper is installed, is coupled, in particular rigidly, to the machine component, and wherein the damping mass arrangement and the support are coupled with the clearance, at least in the operating state, and preferably in that the damping arrangement, in particular a damping element of the damping arrangement, is arranged between the damping mass arrangement and the support, and wherein at least one of:

(i) the support is of sleeve-like configuration, and wherein the damping mass arrangement and the damping arrangement are arranged on the outside of the support;

(ii) the damping arrangement comprises at least one substantially annular damping element which is/are arranged between the support and the damping mass arrangement, and preferably in that the damping arrangement comprises two substantially annular damping elements which are arranged coaxially with respect to each other;

or

(iii) the support is of sleeve-like configuration, and wherein the damping mass arrangement is arranged on the outside of the support.

17. The vibration damper as claimed in claim 16, wherein the damping mass arrangement can be deflected in at least two directions in space, preferably in all directions in space, in a manner deforming the damping arrangement.

18. The vibration damper as claimed in claim 16, wherein the support is configured as a housing in which the damping mass arrangement is arranged, and preferably in that the damping arrangement comprises in particular planar damping elements with which the housing is lined.

19. The vibration damper as claimed in claim 16, wherein the support is of the sleeve-like configuration, and wherein the damping mass arrangement and the damping arrangement are arranged on the outside of the support.

20. The vibration damper as claimed in claim 16, wherein the damping arrangement comprises the at least one substantially annular damping element which is/are arranged between the support and the damping mass arrangement, and preferably in that the damping arrangement comprises the two substantially annular damping elements which are arranged coaxially with respect to each other.

21. The vibration damper as claimed in claim 16, wherein the support is of the sleeve-like configuration, and wherein the damping mass arrangement is arranged on the outside of the support.

22. The vibration damper as claimed in claim 16, wherein the damping mass arrangement is configured as a ball, wherein the vibration damper further comprises a support configured as a housing, and wherein the support and the at least one damping element are configured as a hollow ball.

23. The vibration damper as claimed in claim 16, wherein the coupling between the damping mass arrangement and the machine component does not have any clearance in the inoperative state, and wherein the clearance is formed only in the operating state by relaxation of the damping material.

24. A vibration damper for a machine component which vibrates in the operating state thereof, in particular for an impact drilling machine or the like, wherein a damping mass arrangement is provided, which damping mass arrangement, when the vibration damper is installed, is coupled to the machine component and is excited by the vibrations of the machine component via the coupling to provide damping vibrations, characterized in that the coupling between the damping mass arrangement and the machine component has such a clearance, at least in the operating state, that the excitation of the damping mass arrangement in at least one vibration direction originates from a substantially shocklike interaction between the damping mass arrangement and the machine component,

wherein an elastically deformable damping arrangement is provided, which damping arrangement can be deformed by the damping vibrations of the damping mass arrangement,

wherein a support is provided for the damping mass arrangement, which support, when the vibration damper is installed, is coupled, in particular rigidly, to the machine component, and

wherein at least one of:

(i) the support is of sleeve-like configuration, and wherein the damping mass arrangement and the damping arrangement are arranged on an outside of the support;

(ii) the damping arrangement comprises at least one substantially annular damping element which is/are arranged between the support and the damping mass arrangement, and preferably in that the damping arrangement comprises two substantially annular damping elements which are arranged coaxially with respect to each other;

or

(iii) the support is of sleeve-like configuration, and wherein damping mass arrangement is arranged on the outside of the support.

25. The vibration damper as claimed in claim 24, wherein the support is of the sleeve-like configuration, and wherein the damping mass arrangement and the damping arrangement are arranged on the outside of the support.

26. The vibration damper as claimed in claim 24, wherein the damping arrangement comprises the at least one substantially annular damping element which is/are arranged between the support and the damping mass arrangement, and preferably in that the damping arrangement comprises the two substantially annular damping elements which are arranged coaxially with respect to each other.

27. The vibration damper as claimed in claim 24 wherein the support is of the sleeve-like configuration, and wherein the damping mass arrangement is arranged on the outside of the support.