Battery Pack-Operated Hand-Held Power Tool

• US 20100218386A1
• Filed: 02/22/2010
• Published: 09/02/2010
• Est. Priority Date: 02/27/2009
• Status: Abandoned Application

• Current Assignee: Andreas STIHL AG & Company KG (Stihl Holding AG & Company KG)
• Original Assignee: Andreas STIHL AG & Company KG (Stihl Holding AG & Company KG)
• Inventors: Reber, Volker, Heinzelmann, Georg, Mang, Harald, Müller, Matthias, Roßkamp, Heiko
• Application Number:
  US12/709,526
• Publication Number:
  US 20100218386A1
• Time in Patent Office: Days
• US Class Current: 30/277.400
• CPC Class Codes: A01G 3/053 motor-driven
• CPC Class Codes: B25F 5/02 Construction of casings, bodies or handles B25F5/006, B25F5/008 take precedence
• CPC Class Codes: B27B 17/08 Drives or gearings; Devices for swivelling or tilting the chain saw

Abstract

A hand-held power tool has a device housing having a battery pack compartment. An electric drive motor is arranged in the device housing. An output for driving a working tool is connected to the electric drive motor and arranged in the device housing. A battery pack is arranged in the battery pack compartment and is substantially received completely in the battery pack compartment. At least one grip for guiding the power tool is provided. The device housing has a housing volume and the battery pack compartment has a compartment volume located inside the device housing. A ratio of the housing volume to the compartment volume is approximately 1.5 to maximally io approximately 5.

Claims

1. A hand-held power tool comprising:

a device housing having an interior with a battery pack compartment;

an electric drive motor arranged in said device housing;

an output, connected to said electric drive motor and arranged in said device housing, for driving a working tool;

a battery pack arranged in said battery pack compartment and substantially received completely in said battery pack compartment;

at least one grip for guiding the power tool;

wherein said device housing has a housing volume and said battery pack compartment has a compartment volume located inside said device housing;

wherein a ratio of said housing volume to said compartment volume is approximately 1.5 to maximally approximately 5.

2. The power tool according to claim 1, wherein said ratio is smaller than 2.5.

3. The power tool according to claim 1, wherein a ratio of a length of the power tool, measured from said at least one grip that is arranged at a rear of said device housing to a front end face of said device housing, to a spacing of a center of mass of said battery pack from said at least one grip is approximately 1.7 to 2.8.

4. The power tool according to claim 3, wherein said ratio is approximately 2.

5. The power tool according to claim 1, wherein a ratio of a housing height of said device housing measured relative to a bottom of the power tool and a spacing of a center of mass of said battery pack from said bottom is approximately 1.5 to 2.5.

6. The power tool according to claim 5, wherein said ratio is approximately 1.8.

7. The power tool according to claim 1, wherein a center of mass of said battery pack is positioned laterally spaced relative to a longitudinal axis of the power tool.

8. The power tool according to claim 1, wherein said battery pack has a volume of approximately 500 cm³ to 1,200 cm³.

9. The power tool according to claim 8, wherein said volume of said battery pack is approximately 1,100 cm³.

10. The power tool according to claim 1, wherein said battery pack has a nominal voltage of approximately 12 volts to 80 volts.

11. The power tool according to claim 10, wherein said nominal voltage of said battery pack is approximately 25 volts to 51 volts.

12. The power tool according to claim 1, wherein said compartment volume is part of said housing volume.

13. The power tool according to claim 1, wherein said at least one grip is an integral rear grip of said device housing and constitutes a portion of said housing volume.

14. The power tool according to claim 1, wherein said battery pack has a substantially parallelepipedal geometry with a longitudinal extension that extends approximately across an entire height of said device housing.

15. The power tool according to claim 1, wherein said at least one grip is an integral rear grip of said device housing and wherein a front grip is connected to said device housing, wherein said battery pack is disposed between sad rear grip and said front grip.

16. The power tool according to claim 15, wherein said electric drive motor and said output are arranged in said device housing in an area between said battery pack compartment and a front end face of said device housing.

17. The power tool according to claim 16, wherein said electric drive motor is positioned approximately below an upper grip section of said front grip.

18. The power tool according to claim 1, wherein a longitudinal axis of said battery pack compartment is positioned relative to a longitudinal axis of said device housing at an angle that is smaller than 90°

.

19. The power tool according to claim 18, wherein said longitudinal axis of said battery pack compartment relative to a perpendicular onto a bottom of said device housing is tilted to the front or to the rear of said device housing by an angle in a range of approximately 2°

to 20°

.

20. The power tool according to claim 19, wherein said angle is 10°

to 15°

.

21. The power tool according to claim 1, wherein an axis of rotation of said electric drive motor is positioned transverse to a longitudinal axis of the power tool.

22. The power tool according to claim 21, wherein said axis of rotation is positioned at an angle of 90°

relative to said longitudinal axis of the power tool.

23. The power tool according to claim 1, wherein said at least one grip is a front grip connected to said device housing, wherein said electric drive motor is an EC motor comprising an electronic control, wherein said electronic control is arranged in an area of said front grip in said device housing.

24. The power tool according to claim 1, wherein a front end face of said device housing has a rearwardly slanted surface that is positioned relative to a longitudinal axis of said device housing at an angle of 10°

to 40°

.

25. The power tool according to claim 1, wherein a center of gravity of the power tool with the working tool is positioned in an area of said at least one grip embodied as a front grip in such a way that, when lifting the power tool by gripping an upper grip section of said front grip, said device housing pivots in a pivot range of +15°

to −

30°

about said upper grip section.