Tool fastenable to a drive shaft of a hand-held power tool driveable in oscillating manner

Patent metadata

Field	Value
Publication number	US-9272435-B2
Application number	US-201414154322-A
Country	US
Kind code	B2
Filing date	Jan 14, 2014
Priority date	Oct 19, 2004
Publication date	Mar 1, 2016
Grant date	Mar 1, 2016

Abstract

A tool for use with is configured with a tool centering element and a fastening portion with form-locking elements for axial mounting and fastening onto a drive shaft of a hand-held power tool. The drive shaft is drivable in oscillating fashion and the centering element centers the tool relative to the drive shaft. The tool form-locking elements define a rotary position of the tool relative to the drive shaft. The centering element may be a through-hole in a fastening portion of the tool or, may be a fastening screw that passes through an axially centered through hole in the fastening portion to the tool for securing the toll and fastening screw in a bore within the drive shaft to which the tool is attached for intended operation.

First claim

What is claimed is:

1. A blade for mounting on a drive shaft of a hand-held power tool, the blade comprising:
a working portion; and
a fastening portion including blade form-locking elements for axial mounting and fastening the blade onto a drive shaft of the hand-held power tool; and a blade centering element configured to center the blade relative to a drive shaft of the hand-held power tool, the blade centering element is embodied as an opening that passes through the blade;
wherein the fastening portion forms a first blade part arranged in parallel to the working portion, which forms a second blade part;
wherein the second blade part is permanently connected to the first blade part via an inclined section of the blade, said inclined section is arranged relative to the fastening portion by an angle other than 90°;
wherein said blade form-locking elements are located radially outside said blade centering element in a circular arrangement, are defined as openings that pass through the blade, have a quadrangular cross section for corresponding to a trapezoidal cross section of flange form-locking elements of the hand-held power tool, are distributed uniformly over an angular range that is defined by an entire circumference of the circular arrangement, are configured to define a plurality of different, adjacent rotary positions, relative to the drive shaft of the hand-held power tool, and comprise at least one slaving face that is flat.

2. The blade as recited in claim 1 , wherein the blade centering element has a closed circular cross-section.

3. The blade as recited in claim 1 , wherein the blade form-locking elements are spaced apart from the blade centering element.

4. The blade as recited in claim 1 , wherein there are twelve blade form-locking elements for corresponding to twelve drive shaft form-locking elements.

5. The blade as recited in claim 1 , wherein the adjacent rotary positions are separated by 30° intervals.

6. The blade as recited in claim 1 , wherein a bearing face on the fastening portion on which the blade form-locking elements are disposed corresponds to a slaving face of a flange on which the drive shaft form-locking elements are disposed.

7. The blade as recited in claim 6 , wherein a radius of the blade form-locking elements is four times as large as a radius of the blade centering element.

8. The blade as recited in claim 1 , wherein the blade form-locking elements are embodied as raised bulges that engage corresponding recesses on the drive shaft.

9. A blade for mounting on a drive shaft of a hand-held power tool, the blade comprising:
a working portion; and
a fastening portion including blade form-locking elements for axial mounting and fastening the blade onto a drive shaft of the hand-held power tool; and
a blade centering element configured to center the blade relative to a drive shaft of the hand-held power tool, the blade centering element is embodied as an opening that passes through the blade and have having a closed circular cross-section;
wherein the fastening portion forms a first blade part arranged in parallel to the working portion, which forms a second blade part;
wherein the second blade part is permanently connected to the first blade part via an inclined section of the blade;
wherein said blade form-locking elements are located radially outside said blade centering element in a circular arrangement, are defined as openings that pass through the blade, have a quadrangular cross section for corresponding to a trapezoidal cross section of flange form-locking elements of the hand-held power tool, are distributed uniformly over an angular range that is defined by an entire circumference of the circular arrangement, are configured to define a plurality of different, adjacent rotary positions, relative to the drive shaft of the hand-held power tool, and comprise at least one slaving face that is flat.

10. The blade as recited in claim 9 , wherein the blade form-locking elements are spaced apart from the blade centering element.

11. The blade as recited in claim 9 , wherein there are twelve blade form-locking elements for corresponding to twelve drive shaft form-locking elements.

12. The blade as recited in claim 9 , wherein the adjacent rotary positions are separated by 30° intervals.

13. The blade as recited in claim 9 , wherein a diameter of the blade centering element amounts to 6 mm for corresponding to a diameter of the drive shaft.

14. The blade as recited in claim 9 , wherein a bearing face on the fastening portion on which the blade form-locking elements are disposed corresponds to a slaving face of a flange on which the drive shaft form-locking elements are disposed.

15. The blade as recited in claim 9 , wherein a radius of the blade form-locking elements is four times as large as a radius of the blade centering element.

16. The blade as recited in claim 9 , wherein the blade form-locking elements are embodied as raised bulges that engage recesses on the drive shaft.

17. A blade for mounting on a drive shaft of a hand-held power tool, the tool compromising:
a working portion; and
a fastening portion including blade form-locking elements for axial mounting and fastening the blade onto a drive shaft of the hand-held power tool; and
a blade centering element configured to center the blade relative to the drive shaft of the hand-held power tool, the blade centering element is embodied as an opening that passes through the blade;
wherein the fastening portion forms a first blade part arranged in parallel to the working portion, which forms a second blade part;
wherein the second blade part is permanently connected to the first blade part via an inclined section of the blade;
wherein said blade form-locking elements are located radially outside said blade centering element in a circular arrangement, are defined as openings that pass through the blade, have a quadrangular cross section for corresponding to a trapezoidal cross section of flange form-locking elements of the hand-held power tool, are distributed uniformly over an angular range that is defined by an entire circumference of the circular arrangement, are configured to define a plurality of different, adjacent rotary positions, relative to the drive shaft of the hand-held power tool, and blade fastening portion, are spaced apart from the circular blade centering element and comprise at least one slaving face that is flat.

18. The blade as recited in claim 17 , wherein there are twelve blade form-locking elements for corresponding to twelve drive shaft form-locking elements.

19. The blade as recited in claim 17 , wherein the adjacent rotary positions are separated by 30° intervals.

20. The blade as recited in claim 17 , wherein a diameter of the blade centering element amounts of 6 mm for corresponding to a diameter of the drive shaft.

21. The blade as recited in claim 17 , wherein a bearing face on the fastening portion on which the blade form-locking elements are disposed corresponds to a slaving face of a flange on which the drive shaft form-locking elements are disposed.

22. The blade as recited in claim 17 , wherein a radius of the blade form-locking elements is four times as large as a radius of the blade centering element.

23. The blade as recited in claim 17 , wherein the blade form-locking elements are embodied as raised bulges that engage recesses on the drive shaft.

Assignees

• Bosch Gmbh Robert

Inventors

• Bohne Ulrich

Classifications

• B24B23/04 Primary

  with oscillating grinding tools; Accessories therefor · CPC title

• Y10T83/9464

  For rotary tool · CPC title

• Y10T403/18

  Cross-Sectional Technologies · mapped topic

• B24B45/00

  Means for securing grinding wheels on rotary arbors (suppression of vibrations in systems F16F15/00; testing static or dynamic balancing of machines G01M1/00) · CPC title

• B27B5/32

  Devices for securing circular saw blades to the saw spindle · CPC title