Power tool with a wire harness extending between a drive unit and an operating handle

Patent metadata

Field	Value
Publication number	US-12176129-B2
Application number	US-202117541720-A
Country	US
Kind code	B2
Filing date	Dec 3, 2021
Priority date	Dec 11, 2020
Publication date	Dec 24, 2024
Grant date	Dec 24, 2024

Abstract

A power tool has a drive unit and an operating handle. At least one electrical line connects the operating handle and the drive unit to each other. The at least one electrical line is fastened at a first electrical connection location to the operating handle and at a second electrical connection location to the drive unit. A safety cable extends along the at least one electrical line between operating handle and drive unit. The safety cable has a first end section and a second end section. The first end section is connected mechanically fixed at a first fixation location to the operating handle. The second end section is connected mechanically fixed at a second fixation location to the drive unit. The at least one electrical line and the safety cable are guided together such that the safety cable forms a tear-off protection for the at least one electrical line.

First claim

What is claimed is:

1. A power tool comprising:
a drive unit;
an operating handle;
at least one electrical line connecting the operating handle and the drive unit to each other, wherein the at least one electrical line is fastened at a first electrical connection location to the operating handle and fastened at a second electrical connection location to the drive unit;
a safety cable extending along the at least one electrical line between the operating handle and the drive unit, wherein the safety cable has a first end section and a second end section, wherein the first end section is connected mechanically fixed at a first fixation location to the operating handle and the second end section is connected mechanically fixed at a second fixation location to the drive unit;
wherein the at least electrical line and the safety cable are guided together such that the safety cable forms a tear-off protection for the at least one electrical line.

2. The power tool according to claim 1 , wherein the safety cable is electrically conductive.

3. The power tool according to claim 2 , wherein the safety cable contacts the operating handle electrically conductively and is connected electrically conductively to the drive unit.

4. The power tool according to claim 2 , wherein the operating handle comprises an outer electrically conductive wall surface and the safety cable electrically conductively contacts the outer electrically conductive wall surface.

5. The power tool according to claim 1 , wherein the safety cable provides a potential compensation between the operating handle and the drive unit.

6. The power tool according to claim 1 , wherein the second fixation location of the second end section of the safety cable is located in front of an end of the safety cable and wherein the end of the safety cable projecting past the second fixation location provides an electrical connection.

7. The power tool according to claim 1 , wherein the safety cable is mechanically fixed by shaped nipples.

8. The power tool according to claim 1 , wherein a plurality of the at least one electrical line are combined to a line bundle, wherein the line bundle and the safety cable extend together from the operating handle to the drive unit.

9. The power tool according to claim 8 , further comprising a cable sleeve, wherein the line bundle and the safety cable extend together in the cable sleeve.

10. The power tool according to claim 1 , wherein a plurality of the at least one electrical line form a line bundle and wherein the safety cable is decoupled from the line bundle.

11. The power tool according to claim 1 , wherein the safety cable is provided with a sheath.

12. The portal according to claim 1 , wherein a shaped nipple is disposed on the safety cable and arranged inside a housing of the drive unit.

13. The power tool according to claim 1 , wherein the safety cable is a steel cable.

14. The power tool according to claim 1 , wherein the drive unit is an electric drive unit.

15. The power tool according to claim 1 , wherein the power tool is a blower device comprising a blower tube, wherein the operating handle is secured on the blower tube, wherein a plurality of the at least one electrical line form a line bundle extending along the blower tube.

16. The power tool according to claim 15 , wherein the line bundle extends outside of the blower tube along the blower tube.

17. The power tool according to claim 1 , wherein a length of the at least one electrical line between the first connection location and the second connection location is longer than or identical to a length of the safety cable between the first fixation location and the second fixation location.

Assignees

• Stihl Ag & Co Kg Andreas

Inventors

• Dettling Andreas
• Karl Dennis
• Ehrler Denis
• König Markus
• Waiblinger Manuel
• Braun Jan Lukas
• Härtel Alexander

Classifications

• B25F5/00

  Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for · CPC title

• A47L9/2889

  Safety or protection devices or systems, e.g. for prevention of motor over-heating or for protection of the user · CPC title

• A01G20/47 Primary

  Vacuum or blower devices · CPC title

• H01B7/223 Primary

  forming part of a high tensile strength core · CPC title

• H01R43/00 Primary

  Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors (of trolley lines B60M1/28) · CPC title