Hand-held power tool

• US 9,289,892 B2
• Filed: 06/15/2012
• Issued: 03/22/2016
• Est. Priority Date: 06/16/2011
• Status: Active Grant

• Current Assignee: C.&E. Fein GmbH
• Original Assignee: C.&E. Fein GmbH
• Inventors: Schreiber, Alfred
• Primary Examiner(s): Chukwurah, Nathaniel
• Application Number:
  US13/524,235
• Publication Number:
  US 20120318545A1
• Time in Patent Office: 1,376 Days
• Field of Search: 173/1, 173/2, 173/4, 173/217, 173/162.1
• US Class Current: 1/1
• CPC Class Codes: B25F 3/00 Associations of tools for different working operations with one portable power-drive means; Adapters therefor
• 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

A power-operated hand-held power tool, in particular a power tool comprising an oscillation drive for driving a tool in an oscillating manner, comprising at least one sensor for detecting vibrations and comprising a controller which is coupled to the at least one sensor to control at least one operating parameter of the power tool according to an output signal of the at least one sensor, the power tool being configured to receive different tools, and the controller being configured to evaluate the output signal of the at least one sensor and preferably to compare the output signal with stored characteristic values for the vibrations of different tools so as to control at least one operating parameter of the power tool according to said comparison, is specified.

Claims

1. A hand-held power tool machine, comprising:

a motor for driving said hand-held power tool machine;

a controller for controlling said hand-held power tool machine;

at least one sensor for detecting vibrations of said hand-held power tool machine and for generating an output signal characteristic for said vibrations;

wherein said hand-held power tool machine is configured for operating with a plurality of different tools;

wherein said controller is coupled to said at least one sensor and said motor and is configured for evaluating said output signal to generate at least one control signal fed to said motor for controlling at least one operating parameter of said motor depending on said evaluation of said output signal of said at least one sensor for limiting vibrations of said power tool machine to a permissible maximum value based on said particular tool and on said output signal of said sensor.

2. A method of controlling a hand-held power tool machine, comprising the steps of:

detecting at least one characteristic value for vibrations;

storing said at least one characteristic value for each one of a plurality of different tools with which the hand-held power tool machine can be operated;

comparing said stored characteristic value with a characteristic value for vibrations with a tool currently received on the hand-held power tool machine and generating a control signal thereby; and

controlling at least one operating parameter of a motor driving said hand-held power tool machine using said control signal to effect a limitation of vibrations of said power tool to a permissible maximum value.

3. A hand-held power tool machine, comprising:

a motor;

an oscillation drive driven by said motor for driving a tool in an oscillating manner;

a controller for controlling said hand-held power tool machine;

at least one sensor for detecting vibrations of said hand-held power tool machine and for generating an output signal characteristic for said vibrations; and

a storage coupled to said controller;

wherein said hand-held power tool machine is configured for operating with a plurality of different tools;

wherein said storage is configured for storing characteristic values for vibrations caused by particular tools of said plurality of different tools;

wherein said controller is coupled to said at least one sensor and said motor and is configured for comparing said output signal of said at least one sensor with said stored characteristic values for vibrations for detecting said particular tool;

and wherein said controller is further configured for generating a control signal fed to said motor for controlling at least one operating parameter of said motor according to said comparison for limiting vibrations to a permissible maximum value based on said characteristic values for vibrations of said particular tool and on said output signal of said sensor.

4. The hand-held power tool machine of claim 3, wherein said controller is configured for evaluating said output signal of said at least one sensor during a state selected from the group consisting of an idling mode and a start-up mode.

5. The hand-held power tool machine of claim 4, wherein said start-up mode is run at least during a first start-up of said hand-held power tool machine.

6. The hand-held power tool machine of claim 4, wherein said controller is configured for automatically activating said start-up mode depending on a particular condition.

7. The hand-held power tool machine of claim 4, wherein said controller is configured for automatically activating said start-up mode depending on a condition selected form the group consisting of each new start of the controller and each new connection of the hand-held power tool machine to an external power supply.

8. The hand-held power tool machine of claim 3, wherein said controller is configured for recording and storing said output signal of said at least one sensor for each tool selected from said plurality of different tools.

9. The hand-held power tool machine of claim 8, wherein said controller is configured for recording and storing said output signal of said at least one sensor for each tool selected from said plurality of different tools during a state selected from the group formed by an idling mode and a start-up mode of said hand-held power tool machine.

10. The hand-held power tool machine of claim 9, wherein said controller is configured for evaluating said output signal of said at least one sensor and for comparing it with said stored values for said plurality of different tools so as to determine the type of tool.

11. The hand-held power tool machine of claim 10, wherein said controller is configured for optimizing the operating parameters according to the type of tool determined.

12. The hand-held power tool machine of claim 3, further comprising a sensor for tool recognition.

13. The hand-held power tool machine of claim 3, further comprising a device for transferring data from the tool to the hand-held power tool machine.

14. The hand-held power tool machine of claim 3, wherein said controller is configured for storing a map of operating parameters of each of said plurality of different tools.

15. The hand-held power tool machine of claim 3, wherein said controller is configured for limiting speed or power consumption so as to avoid that a maximum value for acceleration of the hand-held power tool machine in at least one direction is exceeded.

16. The hand-held power tool machine of claim 15, wherein said controller is configured for limiting acceleration in at least one spatial direction to a maximum value of 5 m/s².

17. The hand-held power tool machine of claim 3, wherein at least one sensor is provided which is selected from the group consisting of an acceleration sensor in one, two or three directions, a rotational acceleration sensor, an amperage sensor, a speed sensor, a voltage sensor and a phase sensor for controlling phase angle of a power supply.

18. The hand-held power tool machine of claim 3, further comprising:

a storage for storing characteristic values for vibrations caused by particular tools of said plurality of different tools;

wherein said controller is configured for comparing said output signal of said at least one sensor with said stored characteristic values for vibrations and for generating said control signal for controlling said at least one operating parameter of said motor according to said comparison.