Portable Oscillatory Power Tool With Planetary Gear

• US 20120067607A1
• Filed: 09/19/2011
• Published: 03/22/2012
• Est. Priority Date: 09/17/2010
• Status: Active Grant

• Current Assignee: C.&E. Fein GmbH
• Original Assignee: C.&E. Fein GmbH
• Inventors: Weber, Heinrich, Blickle, Juergen
• Granted Patent: US 8,757,285 B2
• Time in Patent Office: Days
• US Class Current: 173/216
• CPC Class Codes: B23Q 5/04 rotary shafts, e.g. working-spindles
• CPC Class Codes: B24B 23/04 with oscillating grinding tools; Accessories therefor
• CPC Class Codes: B24B 27/08 being portable
• CPC Class Codes: B24B 47/16 performing a reciprocating movement, e.g. during which the sense of rotation of the working-spindle is reversed
• 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

The invention discloses a portable tool having a housing with a gearhead, having a motor shaft which can be rotationally driven by a motor and which can be coupled via an eccentric coupling drive to a tool spindle for the drive thereof, wherein the tool spindle can be driven in a rotational oscillatory manner about the longitudinal axis thereof and is configured for accommodating a tool, wherein a motion-reversal drive is provided which is configured for converting an oscillating drive movement produced by the eccentric coupling drive into an oscillating output movement which has a direction of oscillation opposed to said drive movement. The motion-reversal drive is configured as an epicyclic gearing.

Claims

1. A portable power tool comprising:

a housing having a gearhead;

a motor rotationally driving a motor shaft;

a tool spindle comprising a tool receptacle for receiving a tool;

an eccentric coupling drive being driven by said motor shaft, said eccentric coupling drive driving said tool spindle rotatingly oscillatingly about a longitudinal axis thereof; and

a motion-reversal drive being configured for converting an oscillating drive movement generated by said eccentric coupling drive into an oscillating output movement having a direction of oscillation opposed to a direction of oscillation of said eccentric coupling drive;

wherein said eccentric coupling drive comprises a revolving eccentric being rotatingly driven by said motor and engaging an arched surface of a swivellable driver fork driving said motion-reversal drive;

wherein said motion-reversal drive is configured as an epicyclic gearing.

2. The portable tool of claim 1, wherein said motion-reversal drive is arranged coaxially to a longitudinal axis of said tool spindle.

3. The portable tool of claim 1, wherein said motion-reversal drive comprises a ring gear being coupled to said swivellable driver fork for conjoint rotation.

4. The portable tool of claim 1, wherein said motion-reversal drive comprises a sun gear being coupled to said tool spindle for conjoint rotation.

5. The portable tool of claim 4, wherein said sun gear is configured integral with said tool spindle.

6. The portable tool of claim 1, wherein said motion-reversal drive comprises a sun gear being coupled to said swivellable driver fork for conjoint rotation.

7. The portable tool of claim 1, wherein said motion-reversal drive comprises a ring gear being coupled to said tool spindle for conjoint rotation.

8. The portable tool of claim 1, wherein said motion-reversal drive comprises a planet carrier which can be coupled to said housing for conjoint rotation.

9. The portable tool of claim 1, wherein said motion-reversal drive comprises a plurality of planet gears.

10. The portable tool of claim 9, wherein said motion-reversal drive comprises three planet gears.

11. A portable power tool comprising:

a housing having a gearhead;

a motor rotationally driving a motor shaft;

a tool spindle comprising a tool receptacle for receiving a tool;

an eccentric coupling drive being driven by said motor shaft, said eccentric coupling drive driving said tool spindle rotatingly oscillatingly about a longitudinal axis thereof; and

a motion-reversal drive being configured as an epicyclic gearing configured for converting an oscillating drive movement generated by said eccentric coupling drive into an oscillating output movement having a direction of oscillation opposed to a direction of oscillation of said eccentric coupling drive.

12. The portable tool of claim 11, wherein said eccentric coupling drive further comprises a driver being oscillatingly driven and being coupled to said motion-reversal drive for driving same.

13. The portable tool of claim 12, wherein said driver is configured as a swivellable driver fork, and wherein said eccentric coupling drive comprises a revolving eccentric section engaging an arched surface of said driver fork.

14. The portable tool of claim 11, wherein said motion-reversal drive further comprises a control element having a first position and a second position, wherein said motion-reversal is configured for converting a driving movement into an output movement having a direction of oscillation opposed to a direction of oscillation of said driving movement when said control element is in said first position, and for converting the driving movement into an output movement having the same direction of oscillation when said control element is in said second position.

15. The portable tool of claim 14, wherein said epicyclic gearing further comprises a planet carrier cooperating with said control element, said control element being configured for displacing said planet carrier between said first and second positions.

16. The portable tool of claim 15, wherein said planet carrier, when being in said second position, is configured for locking said motion-reversal drive for directly converting a driving movement into an output movement.

17. The portable tool of claim 15, wherein said planet carrier is coupled to said housing in a rotationally fixed manner when said control element is in said first position and is rotatable relative to said housing when said control element is in said second position.

18. A portable power tool comprising:

a housing having a gearhead;

a motor rotationally driving a motor shaft;

a tool spindle comprising a tool receptacle for receiving a tool;

an eccentric coupling drive being driven by said motor shaft, said eccentric coupling drive driving said tool spindle rotatingly oscillatingly about a longitudinal axis thereof; and

a motion-reversal drive being configured for converting an oscillating drive movement generated by said eccentric coupling drive into an oscillating output movement having a direction of oscillation opposed to a direction of oscillation of said eccentric coupling drive.

19. The portable tool of claim 18, wherein said motion-reversal drive is configured as a motion-reversal gear.

20. The portable tool of claim 18, wherein said motion-reversal drive is configured as an epicyclic gearing.