Oscillatory drive

Patent metadata

Field	Value
Publication number	US-9975191-B2
Application number	US-201414548053-A
Country	US
Kind code	B2
Filing date	Nov 19, 2014
Priority date	Nov 25, 2013
Publication date	May 22, 2018
Grant date	May 22, 2018

Abstract

An oscillatory drive is specified, having a housing in which there are accommodated a drive motor for driving a motor shaft in rotation and a tool spindle, and a first coupling drive mechanism which is coupled to the motor shaft and to the tool spindle for the purpose of driving the tool spindle in oscillatory fashion about its longitudinal axis, wherein a second coupling drive mechanism is coupled to the tool spindle such that the tool spindle performs a superposed movement composed of a rotary oscillating movement and a movement directed perpendicular to its longitudinal axis.

First claim

What is claimed is:

1. An oscillatory drive having a housing receiving
a drive motor having a motor shaft driven rotatingly;
a tool spindle being configured for receiving a tool;
a first coupling drive mechanism being coupled to said motor shaft and to said tool spindle for driving said tool spindle oscillatingly about a longitudinal axis thereof in an oscillatory motion having a first amplitude;
a second coupling drive mechanism being coupled to said tool spindle and said first coupling drive mechanism, said second coupling drive mechanism being configured for exerting a second periodical motion perpendicular to said longitudinal axis and having a second amplitude, whereby said tool spindle exerts a superposed movement composed of an oscillating movement oscillating back and forth about said longitudinal axis and a movement directed perpendicular to said longitudinal axis; and
an adjustment means for adjusting at least one parameter selected from a ratio between said first and second amplitudes and a phase angle between said oscillatory motion of said first coupling drive mechanism and said second periodical motion of said second coupling drive mechanism.

2. An oscillatory drive having a housing receiving
a drive motor having a motor shaft driven rotatingly;
a tool spindle being configured for receiving a tool;
a first coupling drive mechanism being coupled to said motor shaft and to said tool spindle for driving said tool spindle oscillatingly about a longitudinal axis thereof in an oscillatory motion having a first amplitude;
a second coupling drive mechanism being coupled to said tool spindle and said first coupling drive mechanism, said second coupling drive mechanism being configured for exerting a second periodical motion perpendicular to said longitudinal axis and having a second amplitude, whereby said tool spindle exerts a superposed movement composed of an oscillating movement oscillating back and forth about said longitudinal axis and a movement directed perpendicular to said longitudinal axis; and
wherein a ratio between said first and second amplitudes is in a range from 0.1 to 10; and
a phase angle between said oscillatory motion of said first coupling drive mechanism and said second periodical motion of said second coupling drive mechanism.

3. The oscillatory drive of claim 2 , wherein said first coupling drive mechanism is configured for being driven at a first frequency and said second coupling drive mechanism is configured for being driven at a second frequency, and wherein a ratio between said first frequency and said second frequency is in a range from 0.01 to 100.

4. The oscillatory drive of claim 2 , further comprising an adjusting means for adjusting at least one of said amplitude ratio and a phase angle between said first and second coupling drive mechanisms.

5. The oscillatory drive of claim 1 , wherein said first coupling drive mechanism is configured as an eccentric coupling drive mechanism, said eccentric coupling drive mechanism comprising an eccentric being driven by said motor shaft, and an eccentric bearing arranged on said eccentric, said tool spindle being coupled to a pivot lever engaging said eccentric bearing for driving said tool spindle oscillatingly about said longitudinal axis.

6. An oscillatory drive having a housing receiving
a drive motor having a motor shaft driven rotatingly;
a tool spindle being configured for receiving a tool;
a first coupling drive mechanism being coupled to said motor shaft and to said tool spindle for driving said tool spindle oscillatingly about a longitudinal axis thereof;
a second coupling drive mechanism being coupled to said tool spindle and said first coupling drive mechanism, said second coupling drive mechanism being configured for moving periodically in a plane perpendicular to said longitudinal axis so as to exert on said tool spindle a superposed movement composed of an oscillating movement oscillating back and forth about said longitudinal axis and a movement directed perpendicular to said longitudinal axis.

7. The oscillatory drive of claim 6 , wherein said second coupling drive mechanism is coupled to said tool spindle for displacing said tool spindle periodically in a plane perpendicular to said longitudinal axis.

8. The oscillatory drive of claim 6 , wherein said second coupling drive mechanism is configured for displacing said tool spindle in a plane perpendicular to said longitudinal axis eccentrically about said longitudinal axis.

9. The oscillatory drive of claim 8 , further comprising a hollow shaft wherein an eccentric is mounted for driving said tool spindle along a circle eccentrically about said longitudinal axis within said hollow shaft.

10. The oscillatory drive of claim 9 , further comprising bearings received within said housing, an eccentric ring being mounted rotatably within said bearings, said tool spindle being mounted within said eccentric ring rotatably by means of bearings so as to allow rotating said tool spindle along a circle eccentrically about said longitudinal axis.

11. The oscillatory drive of claim 9 , further comprising a belt drive mechanism said hollow shaft engaging said motor shaft and said tool spindle for driving said hollow shaft.

12. The oscillatory drive of claim 6 , wherein said second coupling drive mechanism is configured for pivoting said tool spindle oscillatingly with respect to a pivot axis extending parallel to said longitudinal axis of said tool spindle.

13. The oscillatory drive of claim 12 , further comprising a pivot lever being pivotable in oscillatory fashion about said pivot axis that is static with respect to said housing, said tool spindle being mounted on said pivot lever.

14. The oscillatory drive of claim 13 , further comprising a cam drive mechanism driven oscillatingly by said motor shaft, said cam drive mechanism driving said pivot lever at an end thereof being remote from said tool spindle.

15. The oscillatory drive of claim 14 , wherein said cam drive mechanism further comprises a cam being driven eccentrically by said motor shaft and a return spring for biasing said pivot lever against said cam.

16. The oscillatory drive of claim 13 , further comprising an eccentric coupling drive mechanism being driven by said motor shaft and driving said pivot lever.

17. The oscillatory drive of claim 6 , wherein said second coupling drive mechanism is configured for moving said tool spindle back and forth in one direction in a plane perpendicular to said longitudinal axis.

18. The oscillatory drive of claim 6 , further comprising a switch for selectively activating or deactivating said second coupling drive mechanism.

19. The oscillatory drive of claim 6 , wherein said second coupling drive mechanism further comprises at least one actuator for driving said coupling drive mechanism.

20. The oscillatory drive of claim 19 , further comprising at least a first actuator for displacing said tool spindle in a first direction, and at least a second actuator for displacing said tool spindle in a second direction that differs from said first direction.

Assignees

• Fein C & E Gmbh

Inventors

• Bek Fabian
• Blickle Juergen

Classifications

• B23D51/16 Primary

  of drives or feed mechanisms for straight tools, e.g. saw blades, or bows · CPC title

• B27B19/006 Primary

  with oscillating saw blades; Hand saws with oscillating saw blades · CPC title