Power tool, particularly a hand-held power tool

• US 9,073,134 B2
• Filed: 03/16/2009
• Issued: 07/07/2015
• Est. Priority Date: 05/14/2008
• Status: Expired due to Fees

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Koeder, Thilo, Platzer, Joachim
• Primary Examiner(s): FLORES SANCHEZ, OMAR
• Application Number:
  US12/992,130
• Publication Number:
  US 20110067248A1
• Time in Patent Office: 2,304 Days
• Field of Search: 30392-394, 83/13, 833/64, 833/69, 833/70, 700/279, 144/154.5
• US Class Current: 1/1
• CPC Class Codes: B23D 51/10 for hand-held or hand-operated devices
• CPC Class Codes: B23D 51/16 of drives or feed mechanisms for straight tools, e.g. saw blades, or bows
• CPC Class Codes: B23D 59/002 for the position of the saw blade mounting for swiveling or tilting a circular saw blade B27B5/36; portable power-driven circular saws with adjustment for cutting depth or amount of tilting B27B9/02

Abstract

The invention relates to a power tool (1), especially in the form of a hand-held jigsaw (2). In order to allow for a semi-autonomous operation which assists the user to guide the tool, the tool is provided with a sensor system (27) for observing a detection surface (31, 43) within which the desired working direction is detected as a path default (23) for the saw blade (8) serving as the tool (7) with respect to its alignment relative to the jigsaw (2), the detected path default being intended for downstream control means (26). Said control means align the saw blade (8) relative to the path default (23) by rotating it about its longitudinal axis (25) so that the user guiding the saw blade (2) only has to make sure that the path default (23) extends inside the detection surface (31, 43).

Claims

1. A method for operating a hand-held power tool having a working region for a power tool (7) for processing a work piece (5), and comprising an auxiliary device for guiding the power tool (1) in a manner oriented toward a specified path (23), wherein the auxiliary device comprises a sensor system (27) having a detection area (31;

43) situated around the working region (9), and means in the viewing field (10) of the user for visualizing the detection area (31;

43) and the position thereof relative to the specified path (23), wherein mechanical means are provided for displaying the position of the detection area (31, 43) relative to the specified path (23), and wherein the mechanical display means are formed by parts of the power tool (1), comprising steps of;

guiding the tool (7) using an auxiliary device, oriented to a specified path (23), for processing the work piece (5), wherein the tool (7) is guided using a sensor system (27) which is oriented toward a detection area (31, 43), the position of which is oriented relative to the working region (9) of the tool (7), and the position of the detection area (31, 43) relative to the specified path (23) is signalled.

2. The method according to claim 1, wherein the deviation of the processing point of the tool (7) from the specified path (23), which is coded and/or weighted on the basis of the position of the detection area (31, 43), is symbolized by changing the lighting intensity and/or the color.

3. The method according to claim 1, wherein if the specified path (23) wanders out from the detection area (31, 43), a warning signal in the form of an additional and primarily acoustic warning signal is triggered and/or the power tool (1) is shut off.

4. The method according to claim 1, wherein when the power tool (1) is placed on a work piece (5), the position of the detection area (31, 45) relative to the starting point of the tool (7) on the work piece (5), which is determined by the specified path (23), is signalled.

11. The power tool according to claim 1, wherein the mechanical display means are adjacent to the working region (9).

12. The power tool according to claim 1, wherein the optical display means are disposed at a distance from the working region (9) on the housing (3) of the power tool (1).

13. The power tool according to claim 1, wherein the power tool (1) is designed as a semi-autonomous jigsaw (2) comprising a saw blade (8) which is pivotable about a rotational axis (22) that extends in the longitudinal direction thereof, and is directionally guided using a servo unit (29) in a manner oriented to the specified path (23).

5. A hand-held power tool, comprising:

a working region for a power tool (7) for processing a work piece (5), and comprising an auxiliary device for guiding the power tool (1) in a manner oriented toward a specified path (23),

wherein the auxiliary device comprises a sensor system (27) having a detection area (31;

43) situated around the working region (9), and means in the viewing field (10) of the user for visualizing the detection area (31;

43) and the position thereof relative to the specified path (23), wherein mechanical means are provided for displaying the position of the detection area (31, 43) relative to the specified path (23), and wherein the mechanical display means are formed by parts of the power tool (1),

wherein optical means are provided adjacent to the working region (9) for displaying the position of the detection area (31, 43) relative to the specified path (23), and

wherein a deviation of the working tool (7) from the specified path (23) is weighted in terms of a degree of deviation from the specified path (23) and is visualized using a display field (39) of a display element (38).

6. The power tool according to claim 5, wherein the mechanical display means are adjacent to the working region (9).

7. The power tool according to claim 5, wherein the optical display means are disposed at a distance from the working region (9) on the housing (3) of the power tool (1).

8. The power tool according to claim 5, wherein the power tool (1) is designed as a semi-autonomous jigsaw (2) comprising a saw blade (8) which is pivotable about a rotational axis (22) that extends in the longitudinal direction thereof, and is directionally guided using a servo unit (29) in a manner oriented to the specified path (23).

9. A hand-held power tool, comprising:

a working region for a power tool (7) for processing a work piece (5), and comprising an auxiliary device for guiding the power tool (1) in a manner oriented toward a specified path (23),

wherein the auxiliary device comprises a sensor system (27) having a detection area (31;

43) situated around the working region (9), and means in the viewing field (10) of the user for visualizing the detection area (31;

43) and the position thereof relative to the specified path (23), wherein mechanical means are provided for displaying the position of the detection area (31, 43) relative to the specified path (23), and wherein the mechanical display means are formed by parts of the power tool (1),

wherein optical means are provided for displaying the position of the detection area (31, 43) relative to the specified path (23), and

wherein the particular deviation of the working tool (7) from the specified path (23) is weighted in terms of the degree of deviation from the specified path (23), and is visualized using the display means, in particular in a display field (39) of a display element (38).

14. The power tool according to claim 9, wherein the mechanical display means are adjacent to the working region (9).

15. The power tool according to claim 9, wherein the optical display means are disposed at a distance from the working region (9) on the housing (3) of the power tool (1).

16. The power tool according to claim 9, wherein the power tool (1) is designed as a semi-autonomous jigsaw (2) comprising a saw blade (8) which is pivotable about a rotational axis (22) that extends in the longitudinal direction thereof, and is directionally guided using a servo unit (29) in a manner oriented to the specified path (23).

10. A hand-held power tool, comprising:

a working region for a power tool (7) for processing a work piece (5), and comprising an auxiliary device for guiding the power tool (1) in a manner oriented toward a specified path (23),

wherein the auxiliary device comprises a sensor system (27) having a detection area (31;

43) situated around the working region (9), and means in the viewing field (10) of the user for visualizing the detection area (31;

43) and the position thereof relative to the specified path (23), wherein mechanical means are provided for displaying the position of the detection area (31, 43) relative to the specified path (23), and wherein the mechanical display means are formed by parts of the power tool (1), and

wherein the particular deviation of the working tool (7) from the specified path (23) is weighted in terms of the degree of deviation from the specified path (23), and is visualized using the display means, in particular in a display field (39) of a display element (38).

17. The power tool according to claim 10, wherein the mechanical display means are adjacent to the working region (9).

18. The power tool according to claim 10, wherein the optical display means are disposed at a distance from the working region (9) on the housing (3) of the power tool (1).

19. The power tool according to claim 10, wherein the power tool (1) is designed as a semi-autonomous jigsaw (2) comprising a saw blade (8) which is pivotable about a rotational axis (22) that extends in the longitudinal direction thereof, and is directionally guided using a servo unit (29) in a manner oriented to the specified path (23).