Tool coupling device

• US 9,701,037 B2
• Filed: 05/14/2013
• Issued: 07/11/2017
• Est. Priority Date: 06/28/2012
• Status: Active Grant

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Engelfried, Uwe, Zieger, Jens, Grulich, Petr, Duerr, Thomas
• Primary Examiner(s): PAYER, HWEI-SIU C
• Application Number:
  US14/409,040
• Publication Number:
  US 20150290830A1
• Time in Patent Office: 1,519 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 is configured to hold a machine tool cutting device. In particular, the tool coupling device is configured to hold a machine tool cutting device configured as a closed system, having at least one cutting train clamping unit for generating a cutting train clamping force and having at least one tool-holding unit comprising at least one movably mounted tool-holder element. The tool coupling device includes at least one movement-coupling unit by which the tool-holder element can be coupled with a clamping element for a movement of the clamping element of the cutting train clamping unit.

Claims

1. A tool coupling device for receiving a power-tool parting device, the tool coupling device comprising:

a main body;

at least one cutting-strand tensioning unit supported by the main body and configured to generate a cutting-strand tensioning force;

at least one tool holding unit operatively connected to the at least one cutting-strand tensioning unit and including at least one movably mounted tool holding element having an operating element that is rotatable about an axis of rotation to a first position and a second position; and

at least one movement coupling unit configured to couple the at least one movably mounted tool holding element to a tensioning element of the at least one cutting-strand tensioning unit to move translationally the tensioning element relative to the main body, the at least one movement coupling unit including at least one gate element defining a guide gate through which the tensioning element extends, the guide gate operatively connected to the operating element for coaxial rotation about the axis of rotation with the operating element, the guide gate defining a spiral course in which a first end of the guide gate is located a first distance from the axis of rotation and a second end of the guide gate is located a second distance from the axis of rotation,

wherein the first distance is less than the second distance,

wherein the at least one cutting-strand tensioning unit is configured to apply the cutting-strand tensioning force to the power-tool parting device when the operating element is rotated to position the tensioning element at the second end of the guide gate, and

wherein the at least one cutting-strand tensioning unit is configured to release the cutting-strand tensioning force when the operating element is rotated to position the tensioning element at the first end of the guide gate.

2. A portable power tool, comprising:

a tool coupling device configured to receive a power-tool parting device, the tool coupling device including;

a main body;

at least one cutting-strand tensioning unit supported by the main body and configured to generate a cutting-strand tensioning force;

at least one tool holding unit operatively connected to the at least one cutting-strand tensioning unit and including at least one movably mounted tool holding element having an operating element that is rotatable about an axis of rotation to a first position and a second position; and

at least one movement coupling unit configured to couple the at least one movably mounted tool holding element to a tensioning element of the at least one cutting-strand tensioning unit to move translationally the tensioning element relative to the main body, the at least one movement coupling unit including at least one gate element defining a guide gate through which the tensioning element extends, the guide gate operatively connected to the operating element for coaxial rotation about the axis of rotation with the operating element, the guide gate defining a spiral course in which a first end of the guide gate is located a first distance from the axis of rotation and a second end of the guide gate is located a second distance from the axis of rotation,

wherein the first distance is less than the second distance,

wherein the at least one cutting-strand tensioning unit is configured to apply the cutting-strand tensioning force to the power-tool parting device when the operating element is rotated to position the tensioning element at the second end of the guide gate, and

wherein the at least one cutting-strand tensioning unit is configured to release the cutting-strand tensioning force when the operating element is rotated to position the tensioning element at the first end of the guide gate.

3. A power tool system, comprising:

at least one portable power tool, including;

a main body;

at least one cutting-strand tensioning unit supported by the main body and configured to generate a cutting-strand tensioning force;

at least one tool holding unit operatively connected to the at least one cutting-strand tensioning unit and including at least one movably mounted tool holding element having an operating element that is rotatable about an axis of rotation to a first position and a second position; and

at least one movement coupling unit configured to couple the at least one movably mounted tool holding element to a tensioning element of the at least one cutting-strand tensioning unit to move translationally the tensioning element relative to the main body, the at least one movement coupling unit including at least one gate element defining a guide gate through which the tensioning element extends, the guide gate operatively connected to the operating element for coaxial rotation about the axis of rotation with the operating element, the guide gate defining a spiral course in which a first end of the guide gate is located a first distance from the axis of rotation and a second end of the guide gate is located a second distance from the axis of rotation; and

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

wherein the first distance is less than the second distance,

wherein the at least one cutting-strand tensioning unit is configured to apply the cutting-strand tensioning force to the power-tool parting device when the operating element is rotated to position the tensioning element at the second end of the guide gate, and

wherein the at least one cutting-strand tensioning unit is configured to release the cutting-strand tensioning force when the operating element is rotated to position the tensioning element at the first end of the guide gate.