Guided power tool and method for operating a guided power tool

• US 20050230130A1
• Filed: 04/11/2005
• Published: 10/20/2005
• Est. Priority Date: 04/14/2004
• Status: Abandoned Application

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Strasser, Andreas, Hoffmann, Erhard, Hahn, Dietmar
• Application Number:
  US11/103,262
• Publication Number:
  US 20050230130A1
• Time in Patent Office: Days
• US Class Current: 173/2
• 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

Abstract

The present invention is based on a method for operating a guided power tool (10), in particular an electric power tool, with a rotatably and/or percussively driven insert tool (36), whereby the insert tool (36) is driven into a work piece (34) in a work process.

It is proposed that at least one measured signal detected at the power tool (10) during the work process is evaluated to derive a property of the work piece (34) located in the working direction of the insert tool (36), and the power tool (10) is operated in accordance with the property. A guided power tool is also proposed.

Claims

1. A method for operating a guided power tool (10), in particular an electric power tool, with a rotatably and/or percussively driven insert tool (36), whereby the insert tool (36) is driven into a work piece (34) in a work process,

wherein at least one measured signal detected at the power tool (10) during the work process is evaluated to derive a property of the work piece (34) located in the working direction of the insert tool (36), and the power tool (10) is operated in accordance with the property.

2. The method as recited in claim 1,

wherein the detection and evaluation are carried out repeatedly during the work process.

3. The method as recited in claim 1,

wherein detection and evaluation are carried out permanently during the work process.

4. The method as recited in claim 1,

wherein the power tool (10) automatically adapts to the property of the work piece (34).

5. The method as recited in claim 1,

wherein a warning signal is output when a machining problem is detected.

6. The method as recited in claim 1,

wherein at least one of the signals from the group composed of vibrations, sound, torque, electric current and/or electrical voltage at the drive motor (10), a rotational speed of the drive motor (12) and/or of the insert tool (36) is detected.

7. The method as recited in claim 6,

wherein two or more signals are combined to derive the properties of the work piece (34).

8. The method as recited in claim 1,

wherein a vibration signal of the insert tool (36) is monitored and, when the vibration signal changes, it is analyzed with regard for an embedded object located in the working direction of the insert tool (36) and, when an embedded object (38) is detected, the drive of the insert tool (36) is adjusted and/or an alarm signal is output.

9. A guided power tool, with which an insert tool (36) is drivable by a drive motor (12) located in a housing (18),

wherein an evaluation unit (24) is provided, with which detected sensor signals are capable of being evaluated to derive properties of the work piece (34) in a working direction.

10. The power tool as recited in claim 9,

wherein at least one sensor (26, 28) is provided to detect at least one signal from the group composed of vibration, sound, torque, electric current, electrical voltage, rotational speed.

11. The power tool as recited in claim 9,

wherein a striking mechanism control (32) is provided.