Portable power tool

Patent metadata

Field	Value
Publication number	US-11565395-B2
Application number	US-201716476831-A
Country	US
Kind code	B2
Filing date	Dec 20, 2017
Priority date	Jan 27, 2017
Publication date	Jan 31, 2023
Grant date	Jan 31, 2023

Abstract

A portable power tool, in particular an angle grinder, includes a housing that accommodates a drive and an electronic device with an interface configured to electrically connect the electronic device. The power tool further includes a housing inner part that is configured as a drive housing and supports the electronic device. The interface has at least one first electrical interface contact region and at least one second interface contact region spaced apart from the first interface contact region. At least one insulating element spaced apart from the interface contact regions is arranged between the housing inner part and the electronic device. The insulating element is configured to avoid an electrical short-circuiting connection between the first interface contact region and the second interface contact region.

First claim

The invention claimed is:

1. A portable power tool, comprising:
a housing having at least one of a housing cover or a housing half-shell;
a drive arranged in the housing;
an electronic device arranged in the housing and having an interface configured to electrically connect the electronic device, the interface having at least one first electrical interface contact region and at least one second interface contact region that is spaced apart from the first interface contact region;
a housing inner part configured as a drive housing, the housing inner part supporting the electronic device; and
at least one insulating element spaced apart from the first and second interface contact regions and arranged between the housing inner part and the electronic device, the insulating element configured to avoid an electrical short-circuiting connection between the first interface contact region and the second interface contact region,
wherein the insulating element is configured as a filling element that fills a clearance between a surface of the housing inner part and a surface of the electronic device.

2. The portable power tool as claimed in claim 1 , wherein:
the insulating element forms a first chamber region and a second chamber region, which is spaced apart from the first chamber region,
the insulating element separates the first chamber region from the second chamber region, at least in one section, along a plane, and
the first chamber region has the first interface contact region, and the second chamber region has the second interface contact region.

3. The portable power tool as claimed in claim 2 , wherein the plane extends (i) parallel to a main direction of extent of the portable power tool or (ii) orthogonally to the main direction of extent of the portable power tool.

4. The portable power tool as claimed in claim 1 , wherein the filling element is elastically deformable and is preloaded between the surface of the housing inner part and the surface of the electronic device so as to fill the clearance.

5. The portable power tool as claimed in claim 1 , wherein the clearance has an extent between the surface of the housing inner part and the surface of the electronic device of less than 2 mm.

6. The portable power tool as claimed in claim 5 , wherein the extent of the clearance is less than 0.6 mm.

7. The portable power tool as claimed in claim 1 , wherein the electronic device is configured as one or more of an electric on/off switch, an electric open-loop control unit, and an electric closed-loop control unit.

8. The portable power tool as claimed in claim 7 , wherein the insulating element surrounds the on/off switch in an L shape or C shape and delimits at least two sides or at least three sides of the electronic device in at least one plane.

9. The portable power tool as claimed in claim 1 , wherein the insulating element surrounds the electronic device in an L shape or C shape and delimits at least two sides or at least three sides of the electronic device in at least one plane.

10. The portable power tool as claimed in claim 1 , further comprising:
at least one further insulating element, which is configured to avoid an electrical short-circuiting connection between the first interface contact region and the second interface contact region, is arranged between the housing inner part and the electronic device.

11. The portable power tool as claimed in claim 10 , wherein the electronic device is configured as an open-loop and/or closed-loop control unit, and wherein the at least one further insulating element is arranged between the housing inner part and the open-loop and/or closed-loop control unit.

12. The portable power tool as claimed in claim 1 , wherein the insulating element is configured as an integral shaped stamped part that includes a foam.

13. The portable power tool as claimed in claim 12 , wherein the foam is a polyurethane foam.

14. The portable power tool as claimed in claim 1 , wherein the portable power tool is configured as an angle grinder.

15. The portable power tool as claimed in claim 1 , wherein the clearance defined at least partially in a direction perpendicular to a main direction of extent of the power tool.

16. A portable power tool, comprising:
a housing having at least one of a housing cover or a housing half-shell;
a drive arranged in the housing;
an electronic device arranged in the housing and having an interface configured to electrically connect the electronic device, the interface having at least one first electrical interface contact region and at least one second interface contact region that is spaced apart from the first interface contact region;
a housing inner part that is configured as a drive housing and supports the electronic device; and
at least one insulating element spaced apart from the interface contact regions and arranged between the housing inner part and the electronic device, the insulating element configured to avoid an electrical short-circuiting connection between the first interface contact region and the second interface contact region,
wherein the insulating element is configured as a film with at least one film surface having a self-adhesive layer configured to connect the film to one or more of the housing inner part and the electronic device.

17. A portable power tool, comprising:
a housing having at least one of a housing cover or a housing half-shell;
a drive arranged in the housing;
an electronic device arranged in the housing and having an interface configured to electrically connect the electronic device, the interface having at least one first electrical interface contact region and at least one second interface contact region that is spaced apart from the first interface contact region;
a housing inner part that is configured as a drive housing and supports the electronic device; and
at least one insulating element spaced apart from the interface contact regions and arranged between the housing inner part and the electronic device, the insulating element configured to avoid an electrical short-circuiting connection between the first interface contact region and the second interface contact region,

wherein:
the electronic device has a first labyrinth seal element configured as a sealing groove,
the housing inner part has a second labyrinth seal element configured as a sealing protrusion, and
the insulating element is (i) arranged in or on one or more of the first labyrinth seal element and the second labyrinth seal element and (ii) configured to prevent material transport of metal chips.

18. The portable power tool as claimed in claim 17 , wherein the electronic device is configured as an on/off switch.

Assignees

• Bosch Gmbh Robert

Inventors

• Boeck Cornelius
• Barth Daniel
• Vollmer Rainer
• Andrasic Sinisa
• Lutz Manfred
• Wolf Andreas
• Stierle Peter

Classifications

• B25F5/02 Primary

  Construction of casings, bodies or handles {(B25F5/006, B25F5/008 take precedence)} · CPC title

• B24B23/028

  Angle tools · CPC title