Tool coupling device

• US 9,724,841 B2
• Filed: 06/10/2013
• Issued: 08/08/2017
• Est. Priority Date: 06/28/2012
• Status: Active Grant

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Grulich, Petr, Zieger, Jens, Engelfried, Uwe, Duerr, Thomas
• Primary Examiner(s): PAYER, HWEI-SIU C
• Application Number:
  US14/411,411
• Publication Number:
  US 20150158199A1
• Time in Patent Office: 1,520 Days
• Field of Search: 30386
• CPC Class Codes: B27B 17/02 Chain saws equipped with guide bar B27B17/06 takes precedence
• CPC Class Codes: B27B 17/14 Arrangements for stretching the chain saw

Abstract

A tool coupling device for a receptacle of a machine tool separating device formed as a closed system includes at least one cutting strand tensioning unit that has at least one tensioning element. The tool coupling device also includes at least one operating unit that includes at least one operating element. The cutting strand tensioning unit includes at least one gear unit that is configured to move the tensioning element as a result of an actuation of the operating element of the operating unit.

Claims

1. A power tool system, comprising:

at least one portable power tool including a housing and a tool coupling device mounted on the housing, the tool coupling device including;

at least one cutting-strand tensioning unit comprising a main body fixedly mounted to the housing and at least one tensioning element extending through a guide recess of the main body; and

at least one operating unit pivotally connected to the main body and including at least one operating element,

wherein the tensioning element is mounted in a translationally movable manner relative to the main body and the guide recess,

wherein the cutting-strand tensioning unit comprises at least one transmission unit operatively connected to the at least one operating unit and the tensioning element and configured to move the tensioning element relative to the guide recess as a result of an actuation of the operating element of the operating unit; and

at least one power-tool parting device having at least one cutting strand and at least one guide unit that, together with the cutting strand, forms a closed system,

wherein actuation of the operating element includes pivoting of the at least one operating element relative to the main body.

2. The power tool system as claimed in claim 1, further comprising:

a drive element configured to drive the at least one cutting strand relative to the at least one guide unit; and

a carrier element of the tool coupling element supported by the main body and including an actuating region operatively connected to the at least one operating element, the carrier element defining an opening through which the drive element extends, and the tensioning element extending directly from the carrier element.

3. A portable power tool, comprising:

a housing; and

a tool coupling device mounted on the housing and including;

at least one cutting-strand tensioning unit comprising a main body fixedly mounted to the housing and at least one tensioning element extending through a guide recess of the main body; and

at least one operating unit pivotally connected to the main body and including at least one operating element,

wherein the tensioning element is mounted in a translationally movable manner relative to the main body and the guide recess,

wherein the cutting-strand tensioning unit comprises at least one transmission unit operatively connected to the at least one operating unit and the tensioning element and configured to move the tensioning element relative to the guide recess as a result of an actuation of the at least one operating element of the operating unit, and

wherein actuation of the operating element includes pivoting of the at least one operating element relative to the main body.

4. A tool coupling device for receiving a power-tool parting device realized as a closed system, comprising:

at least one cutting-strand tensioning unit comprising a main body and at least one tensioning element extending through a guide recess of the main body; and

at least one operating unit pivotally connected to the main body and including at least one operating element,

wherein the tensioning element is mounted in a translationally movable manner relative to the main body and the guide recess,

wherein the cutting-strand tensioning unit comprises at least one transmission unit operatively connected to the at least one operating unit and the tensioning element and configured to move the tensioning element relative to the guide recess as a result of an actuation of the at least one operating element of the operating unit, and

wherein actuation of the operating element includes pivoting of the at least one operating element relative to the main body.

5. The tool coupling device as claimed in claim 4, wherein the operating element is mounted such that the operating element is configured to be swiveled about an axis of motion of the operating element that is at least substantially parallel to a plane of main extent of the operating element.

6. The tool coupling device as claimed at least in claim 4, wherein the operating element is mounted such that the operating element is configured to rotate about an axis of motion of the operating element that is at least substantially perpendicular to a plane of main extent of the operating element.

7. The tool coupling device as claimed in claim 4, wherein the transmission unit has at least one gate element configured to move the tensioning element relative to the guide recess as a result of an actuation of the operating element.

8. The tool coupling device at least as claimed in claim 7, wherein the gate element is mounted in a rotatable manner.

9. The tool coupling device as claimed in claim 7, wherein the gate element is mounted in a translationally movable manner relative to the main body.

10. The tool coupling device as claimed in claim 9, wherein the cutting-strand tensioning unit has at least one spring element, that is configured to apply a spring force to the at least one tensioning element and the gate element of the transmission unit.

11. The tool coupling device as claimed in claim 10, wherein the transmission unit comprises at least one lever element that, as a result of an actuation of the operating element, moves the gate element of the transmission unit to move the tensioning element.

12. The tool coupling device as claimed in claim 11, further comprising at least one fixing unit including at least one fixing element configured to fix the operating element in at least one position.

13. The tool coupling device as claimed in claim 12, wherein:

the fixing element is pivotally connected to the at least one operating element,

the at least one operating element defines a first axis of motion about the main body,

the at least one fixing element defines a second axis of motion about the at least one operating element, and

the first axis of motion is parallel to the second axis of motion.

14. The tool coupling device as claimed in claim 4, wherein the transmission unit comprises at least one eccentric element that acts in combination with the tensioning element to move the tensioning element as a result of an actuation of the operating element.

15. The tool coupling device as claimed in claim 4, further comprising:

an eccentric element of the at least one operating element; and

a carrier element supported by the main body and including an actuating region at a first distal end portion of the carrier element against which the eccentric element is positioned,

wherein the tensioning element extends directly from an opposite second distal end portion of the carrier element, and

wherein pivotal movement of the at least one operating element moves the eccentric element relative to the actuating region and causes the eccentric element to slide the carrier element relative to the main body resulting in the translational movement of the tensioning element relative to the main body and the guide recess.

16. The tool coupling device as claimed in claim 15, further comprising:

a spring located in a support region of the carrier element and configured to bias the actuating region of the carrier element against the eccentric element of the at least one operating element.