Hand Tool Machine Having An Oscillatory Drive

• US 20110036609A1
• Filed: 08/11/2010
• Published: 02/17/2011
• Est. Priority Date: 08/11/2009
• Status: Active Grant

• Current Assignee: C.&E. Fein GmbH
• Original Assignee: C.&E. Fein GmbH
• Inventors: Weber, Heinrich, Blickle, Juergen, Klabunde, Olaf
• Granted Patent: US 8,397,832 B2
• Time in Patent Office: Days
• US Class Current: 173/213
• CPC Class Codes: B24B 23/028 Angle tools
• CPC Class Codes: B24B 23/04 with oscillating grinding tools; Accessories therefor
• CPC Class Codes: B25F 5/00 Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
• CPC Class Codes: B27B 19/006 with oscillating saw blades; Hand saws with oscillating saw blades

Abstract

A hand tool is disclosed, comprising a housing, a motor shaft being coupled to a drive motor, a working spindle configured for being driven rotatingly oscillatingly about its longitudinal axis, and a coupling element being driven rotatingly by the motor shaft and having a closed guide surface that revolves around the motor shaft. The guide surface is coupled, via transmission means, to at least one driver for driving the latter. The at least one driver is arranged movably relative to the working spindle and engages the working spindle at a circumferential region thereof for driving the latter rotatingly oscillatingly.

Claims

1. A hand tool machine comprising:

a housing;

a drive motor arranged within said housing;

a motor shaft driven rotatingly by said drive motor;

a working spindle received within said housing and having a receptacle configured for receiving a tool; and

an oscillatory drive gear driven by said motor shaft configured for driving said working spindle rotatingly oscillatingly about a longitudinal axis thereof;

said oscillatory drive gear comprising;

a coupling element arranged on said motor shaft, said coupling element having a closed guide surface revolving around said motor shaft;

at least a first driver guided for translatory movement;

wherein

said first driver at one end thereof engages said closed guide surface of said coupling element; and

said first driver engages said working spindle at a circumferential region thereof for moving said working spindle rotatingly oscillatingly about a longitudinal axis thereof when said first driver is moved back and forth by said coupling element.

2. The hand tool machine according to claim 1, further comprising a second driver guided for translatory movement;

wherein

said second driver at one end thereof engages said closed guide surface of said coupling element;

said second driver engages said working spindle at a circumferential region thereof; and

said first and second drivers are driven back and forth by said coupling element in opposite directions.

3. The hand tool machine according to claim 1, wherein each driver is configured as a sliding joint or coupling joint.

4. The hand tool machine according to claim 1, wherein each driver is biased against said guide surface of said coupling element.

5. The hand tool machine according to claim 2, further comprising first and second springs for biasing said drivers against said guide surface of said coupling element.

6. The hand tool machine according to claim 1, wherein each driver comprises a protrusion configured for engaging a driving portion provided in the circumferential region of said working spindle.

7. The hand tool machine according to claim 6, wherein said protrusion and said driving portion are configured as corresponding toothing parts engaging each other.

8. The hand tool machine according to claim 7, wherein the corresponding toothing parts are configured as involute toothing or cycloidal toothing.

9. The hand tool machine according to claim 6, wherein said protrusion is configured rotationally symmetrical about said driver.

10. The hand tool machine according to claim 6, wherein said protrusion and said driving portion are configured as corresponding joint parts.

11. The hand tool machine according to claim 1, further comprising a wobble bearing for receiving said coupling element.

12. A hand tool machine comprising:

a housing;

a drive motor arranged within said housing;

a motor shaft driven rotatingly by said drive motor;

a working spindle received within said housing and having a receptacle configured for receiving a tool; and

an oscillatory drive gear driven by said motor shaft configured for driving said working spindle rotatingly oscillatingly about a longitudinal axis thereof;

said oscillatory drive gear comprising;

a wobble bearing arranged on said motor shaft and having an outer ring;

first and second drivers, each of said first and second drivers having a first end being hinged to said outer ring;

each of said first and second drivers engaging said working spindle at a circumferential region thereof for moving said working spindle rotatingly oscillatingly about a longitudinal axis thereof when said first and second drivers are moved by said outer ring of said wobble bearing.

13. The hand tool machine according to claim 12, further comprising first and second flange parts arranged on said working spindle;

each of said first and second flange parts being hingedly connected to one of said first and second drivers.

14. The hand tool machine according to claim 12, wherein at least one of said drivers is hingedly connected via a sliding, rolling-ball or roller contact.

15. A hand tool machine comprising:

a housing;

a drive motor arranged within said housing;

a motor shaft driven rotatingly by said drive motor;

a working spindle received within said housing and having a receptacle configured for receiving a tool; and

an oscillatory drive gear driven by said motor shaft configured for driving said working spindle rotatingly oscillatingly about a longitudinal axis thereof;

said oscillatory drive gear comprising;

a cam shaft driven by said motor shaft;

a least a first cam arranged on said cam shaft;

at least a first driver guided for translatory movement;

wherein

said first driver at one end thereof engages said first cam; and

said first driver engages said working spindle at a circumferential region thereof for moving said working spindle rotatingly oscillatingly about a longitudinal axis thereof when said first driver is moved back and forth by said first cam.

16. The hand tool machine according to claim 15, further comprising a second cam arranged on said cam shaft having a contour offset from a contour of said first cam;

and

a second driver guided for translatory movement;

each of said first and second drivers having one end engaging one of said first and second cams;

said first and second drivers engaging said working spindle at a circumferential region thereof for moving said working spindle rotatingly oscillatingly about a longitudinal axis thereof when said first and second drivers are moved back and forth by said first and second cams.

17. The hand tool machine according to claim 15, wherein each cam is arranged on said camshaft fixed against rotation.

18. The hand tool machine according to claim 15, wherein said camshaft and said motor shaft are arranged parallel or perpendicularly in relation to one another.

19. The hand tool machine according to claim 15, wherein each driver is biased against said cam.

20. The hand tool machine according to claim 16, further comprising first and second springs for biasing said drivers against said cams.