Electronic apparatus and machine tool having said electronic apparatus

Patent metadata

Field	Value
Publication number	US-12479079-B2
Application number	US-202017788472-A
Country	US
Kind code	B2
Filing date	Nov 26, 2020
Priority date	Dec 30, 2019
Publication date	Nov 25, 2025
Grant date	Nov 25, 2025

Abstract

The disclosure relates to an electronic apparatus for a machine tool, having at least one electronic unit and having at least one fluid cooling unit for cooling the electronic unit using a fluid. According to the disclosure, the electronic unit is arranged at least primarily, in particular completely, outside of a fluid flow path of the fluid cooling unit.

First claim

The invention claimed is:

1 . A power tool comprising:
at least one electronic device including
at least one electronic unit, and
at least one fluid cooling unit configured to cool the at least one electronic unit using a fluid,
wherein the at least one electronic unit is arranged entirely outside of a fluid flow path of the at least one fluid cooling unit, wherein the at least one fluid cooling unit comprises at least one fluid cooling element against which the at least one electronic unit at least partially bears, wherein the at least one fluid cooling element is realized as a channel element configured to conduct the fluid and that surrounds the fluid flow path of the at least one fluid cooling unit, and wherein the at least one fluid cooling unit is configured such that the fluid flow path extends longitudinally through the channel element.

2 . The power tool as claimed in claim 1 , wherein the at least one electronic unit bears at least partially against an outer wall of the at least one fluid cooling element.

3 . The power tool as claimed in claim 2 , wherein the channel element has a substantially round cross-sectional area defined oriented at least substantially perpendicularly to a central axis and/or a direction of main extent of the at least one fluid cooling element, and the at least one fluid cooling element is configured such that the fluid flow path extends along the central axis of the at least one fluid cooling element.

4 . The power tool as claimed in claim 2 , wherein:
the at least one fluid cooling element has, on the outer wall, at least one contact surface that at least substantially corresponds to a support surface; and the at least one electronic unit bears against the at least one contact surface of the at least one fluid cooling element via the support surface.

5 . The power tool as claimed in claim 1 , wherein the at least one fluid cooling element is, at least in a region against which the at least one electronic unit bears, made of a material having a thermal conductivity of at least 10 W/(m·K).

6 . The power tool as claimed in claim 1 , wherein the fluid flow path, at least in proximity to the at least one electronic unit, extends at least substantially entirely within the at least one fluid cooling element.

7 . The power tool as claimed in claim 1 , further comprising:
at least one sealing unit designed to close the at least one electronic unit, together with the at least one fluid cooling unit, at least partially, with respect to the fluid flow path, at least substantially in an airtight and/or watertight manner.

8 . The power tool as claimed in claim 2 , further comprising:
at least one drive unit, wherein the at least one fluid cooling unit is designed to cool the at least one drive unit.

9 . The power tool as claimed in claim 8 , further comprising:
a housing, wherein the channel element is arranged at least substantially entirely within the housing.

10 . The power tool as claimed in claim 9 , wherein the at least one drive unit is enclosed in the housing.

11 . The power tool as claimed in claim 10 , wherein the at least one drive unit defines a drive axis that is coaxial with a direction of main extent of the at least one fluid cooling unit.

12 . The power tool as claimed in claim 8 , further comprising:
a tool holder configured to be driven by the at least one drive unit.

13 . The power tool as claimed in claim 12 , further comprising;
a separating unit configured to divide a fluid stream in the fluid flow path into at least two sub-streams such that a first sub-stream of the at least two sub-streams has a higher density of foreign bodies in the fluid stream than a second sub-stream of the at least two sub-streams, wherein the separating unit is arranged fluidically downstream of the at least one electronic unit and upstream of the at least one drive unit.

14 . The power tool as claimed in claim 13 , wherein the at least one fluid cooling unit includes at least one outlet opening arranged at a first end region of the power tool that includes the tool holder.

15 . The power tool as claimed in claim 14 , wherein the at least one fluid cooling unit includes at least one inlet opening arranged at a second end region of the power tool opposite the first end region.

16 . The power tool as claimed in claim 1 , wherein the power tool is a hand-held power tool.

Assignees

• Bosch Gmbh Robert

Inventors

• Barth Daniel

Classifications

• H02K9/06

  with fans or impellers driven by the machine shaft · CPC title

• B24B23/028

  Angle tools · CPC title

• B25F5/008 Primary

  Cooling means · CPC title