Separating device for a machine tool

Patent metadata

Field	Value
Publication number	US-9789625-B2
Application number	US-201314410074-A
Country	US
Kind code	B2
Filing date	Jun 17, 2013
Priority date	Jun 28, 2012
Publication date	Oct 17, 2017
Grant date	Oct 17, 2017

Abstract

A separating device for a machine tool includes at least one cutting strand and at least one guide unit configured to guide the cutting strand. The guide unit forms a closed system together with the cutting strand. The separating device further includes at least one cutting strand tensioning unit that is positioned on the guide unit, and that is configured to compensate for at least one of play and tolerance in the cutting strand.

First claim

The invention claimed is:

1. A power-tool parting device comprising:
at least one cutting strand;
at least one guide unit configured to guide the cutting strand and, in combination with the cutting strand, forms a closed system;
a transverse extension disposed in a fixed position on the at least one guide unit and defining an opening; and
at least one cutting-strand tensioning unit positioned on the guide unit and configured to compensate at least one of play and tolerance of the cutting strand,
wherein the cutting-strand tensioning unit includes at least one cutting-strand holding element configured to hold the cutting strand in at least one coupling position and at least one adjusting element extending through the opening in the transverse extension and configured to set at least one position of the cutting-strand holding element relative to the guide unit.

2. The power-tool parting device as claimed in claim 1 , wherein the cutting-strand holding element has a substantially disk-like shape.

3. The power-tool parting device as claimed in claim 2 , wherein the cutting-strand tensioning unit is movably mounted on the guide unit.

4. The power-tool parting device as claimed in claim 3 , wherein:
the guide unit has at least one bearing recess; and
either at least one bearing element of the cutting-strand tensioning unit or a connecting element is configured to engage the at least one bearing recess.

5. The power-tool parting device as claimed in claim 4 , wherein the bearing recess is an oblong hole.

6. The power-tool parting device as claimed in claim 1 , further comprising at least one torque transmission element, which is translationally movably mounted relative to the guide unit, via the cutting-strand tensioning unit.

7. The power-tool parting device as claimed in claim 1 , wherein:
the opening in the transverse extension is a first opening located on a first side of the at least one guide unit,
the at least one adjusting element is a first adjusting element extending through the first opening, and
the cutting-strand tensioning unit further includes a second adjusting element extending through a second opening of the transverse extension located on an opposite second side of the at least one guide unit.

8. The power-tool parting device as claimed in claim 1 , further comprising:
a threaded element disposed in a fixed position on the transverse extension,
wherein the at least one adjusting element is threadingly engaged with the threaded element.

9. A portable power tool comprising a coupling device configured to at least one of form-closed and force-closed couple to a power-tool parting device that includes:
at least one cutting strand;
at least one guide configured to guide the cutting strand and, in combination with the cutting strand, forms a closed system;
a transverse extension disposed in a fixed position on the at least one guide unit and defining an opening; and
at least one cutting-strand tensioning unit positioned on the guide unit and configured to compensate at least one of play and tolerance of the cutting strand,
wherein the cutting-strand tensioning unit includes at least one cutting-strand holding element configured to hold the cutting strand in at least one coupling position and at least one adjusting element extending through the opening in the transverse extension and configured to set at least one position of the cutting-strand holding element relative to the guide unit.

10. The portable power tool as claimed in claim 9 , wherein:
the opening in the transverse extension is a first opening located on a first side of the at least one guide unit,
the at least one adjusting element is a first adjusting element extending through the first opening, and
the cutting-strand tensioning unit further includes a second adjusting element extending through a second opening of the transverse extension located on an opposite second side of the at least one guide unit.

11. The portable power tool as claimed in claim 9 , wherein:
the power-tool parting device includes a threaded element disposed in a fixed position on the transverse extension, and
the at least one adjusting element is threadingly engaged with the threaded element.

12. A power tool system, comprising:
a power-tool parting device that includes:
at least one cutting strand;
at least one guide configured to guide the cutting strand and, in combination with the cutting strand, forms a closed system;
a transverse extension disposed in a fixed position on the at least one guide unit and defining an opening; and
at least one cutting-strand tensioning unit positioned on the guide unit and configured to compensate at least one of play and tolerance of the cutting strand; and

a portable power tool that includes a coupling device configured to at least one of form-closed and force-closed couple to the power-tool parting device,
wherein the cutting-strand tensioning unit includes at least one cutting-strand holding element configured to hold the cutting strand in at least one coupling position and at least one adjusting element extending through the opening in the transverse extension and configured to set at least one position of the cutting-strand holding element relative to the guide unit.

13. The power tool system of claim 12 , wherein:
the opening in the transverse extension is a first opening located on a first side of the at least one guide unit,
the at least one adjusting element is a first adjusting element extending through the first opening, and
the cutting-strand tensioning unit further includes a second adjusting element extending through a second opening of the transverse extension located on an opposite second side of the at least one guide unit.

14. The power tool system of claim 12 , wherein:
the power-tool parting device includes a threaded element disposed in a fixed position on the transverse extension, and
the at least one adjusting element is threadingly engaged with the threaded element.

Assignees

• Bosch Gmbh Robert

Inventors

• Engelfried Uwe
• Grulich Petr

Classifications

• B23D57/023 Primary

  hand-held or hand-operated · CPC title

• B27B17/14 Primary

  Arrangements for stretching the chain saw · CPC title