Hand-held power tool having at least one machine-side contact element

Patent metadata

Field	Value
Publication number	US-10857645-B2
Application number	US-201615763228-A
Country	US
Kind code	B2
Filing date	Sep 19, 2016
Priority date	Sep 29, 2015
Publication date	Dec 8, 2020
Grant date	Dec 8, 2020

Abstract

A hand-held power tool includes a gearing housing part and accessory equipment. The gearing housing part has at least one machine-side contact element. The accessory equipment has at least one accessory-equipment-side contact element. The machine-side contact element and the accessory-equipment-side contact element can be releasably connected to each other.

First claim

The invention claimed is:

1. A hand-held power tool, comprising:
a housing including at least one machine-side contact element;
an accessory including at least one accessory-side contact element, the machine-side contact element and the accessory-side contact element configured to be releasably connected to each other; and
a detection unit configured to detect mechanical fastening of the accessory to the housing, the detection unit including the machine-side contact element,
wherein the machine-side contact element is a magnetic field sensor and the accessory-side contact element is a magnet, and
wherein the accessory is an ancillary handle configured to be gripped by an operator of the hand-held power tool, the magnet arranged in a threaded stem of the ancillary handle.

2. The hand-held power tool as claimed in claim 1 , further comprising:
a motor housing part; and
an electromotive drive unit arranged in the motor housing part and configured to drive a work spindle.

3. The hand-held power tool as claimed in claim 2 , further comprising:
an electronics unit arranged in the hand-held power tool and configured to supply current to the electromotive drive unit.

4. The hand-held power tool as claimed in claim 3 , wherein:
in response to the machine-side contact element and the accessory-side contact element connecting to each other, the electronics unit supplies current to the electromotive drive unit; and
the accessory is in a fitted state.

5. The hand-held power tool as claimed in claim 1 , wherein the detection unit includes a radar sensor element.

6. A hand-held power tool, comprising:
a housing;
a protective hood having a releasable connection to the housing, the protective hood configured to protect an operator of the hand-held power tool, during operation of the hand-held power tool, against sparks and/or material particles produced during operation of the hand-held power tool, and/or against fragments of a disk, broken during operation;
a magnetic field sensor arranged on an output side of the housing;
at least one magnet arranged on the protective hood proximate to the releasable connection; and
a detection unit configured to detect mechanical fastening of the protective hood to the housing depending on a state of a releasable connection between the magnetic field sensor and the at least one magnet.

7. The hand-held power tool as claimed in claim 1 , wherein the detection unit includes an electrical connection element.

8. A hand-held power tool, comprising:
a housing including at least one machine-side contact element; and
an accessory including at least one accessory-side contact element, wherein:
the machine-side contact element and the accessory-side contact element are configured to be releasably connected to each other,
the machine-side contact element is at least two, spaced-apart electrical connection elements, and
the accessory-side contact element is a threaded stem of an ancillary handle, the threaded stem including electrically conductive material that forms an electrical bridge between the electrical connection elements when the ancillary handle is in a fitted state.

9. The hand-held power tool as claimed in claim 1 , wherein the detection unit includes a capacitive proximity switch.

10. The hand-held power tool as claimed in claim 1 , wherein the detection unit includes a pressure sensor element configured to detect a contact pressure of the accessory upon the housing.

11. The hand-held power tool as claimed in claim 1 , wherein the detection unit includes an air-pressure sensor element configured to detect an air pressure.

12. The hand-held power tool as claimed in claim 3 , further comprising:
at least one switching element configured to be actuated when the accessory is fitted on the hand-held power tool and configured to generate at least one item of information indicating that the accessory has been fitted to the hand-held power tool,
wherein, upon actuation of the switching element the at least one item of information is relayed to the electronics unit via at least one electrical conductor.

13. The hand-held power tool as claimed in claim 3 , further comprising:
at least one safety element configured to communicate with at least one of the hand-held power tool, the electronics unit, and a mobile device.

14. The hand-held power tool as claimed in claim 1 , wherein the hand-held power tool is an angle grinder.

15. The hand-held power tool as claimed in claim 1 , wherein the housing is a transmission housing part.

16. The hand-held power tool as claimed in claim 6 , wherein the housing defines a bearing flange, and wherein the protective hood has a protective-hood flange configured to be releasably connected to the bearing flange.

17. The hand-held power tool as claimed in claim 16 , wherein the magnet is arranged at least partially around the protective-hood flange.

18. The hand-held power tool as claimed in claim 16 , wherein the magnet includes at least two magnets spaced apart and distributed around the protective-hood flange.

19. The hand-held power tool as claimed in claim 8 , wherein the housing defines a threaded hole into which the threaded stem is threadedly engaged, a portion of the electrical bridge passing through the threaded hole.

20. The hand-held power tool as claimed in claim 19 , wherein the electrical bridge is formed between the electrical connection elements only when the threaded stem is threadedly engaged in the threaded hole to a predetermined extent so as to achieve the fitted state.

Assignees

• Bosch Gmbh Robert

Inventors

• Schadow Joachim
• Stock Joern
• Esenwein Florian

Classifications

• B24B49/08

  involving liquid or pneumatic means · CPC title

• B24B55/052

  with rotating tools · CPC title

• B24B23/028 Primary

  Angle tools · CPC title

• B25F5/026

  in the form of an auxiliary handle (B25F5/024 takes precedence) · CPC title

• B24B49/10

  involving electrical means (B24B49/02, B24B49/08 take precedence) · CPC title