Hand power tool

Patent metadata

Field	Value
Publication number	US-9630287-B2
Application number	US-201414178385-A
Country	US
Kind code	B2
Filing date	Feb 12, 2014
Priority date	Feb 22, 2013
Publication date	Apr 25, 2017
Grant date	Apr 25, 2017

Abstract

A hand power tool includes a drive unit, an electronic unit, and a cooling device configured to cool at least one of the drive unit and the electronic unit. The hand power tool also includes at least one of an open-loop control unit and a closed-loop control unit configured to control the cooling device.

First claim

What is claimed is:

1. A hand power tool, comprising:
a drive unit;
an electronic unit configured to control the drive unit;
a cooling device including a first cooling unit configured to cool the drive unit and the electronic unit a second cooling unit configured to additionally cool the electronic unit; and
at least one of an open-loop control unit and a closed-loop control unit configured to control the cooling device.

2. The hand power tool according to claim 1 , wherein the at least one of the open-loop control unit and closed-loop control unit is configured to manually control the cooling device.

3. The hand power tool according to claim 1 , wherein the at least one of the open-loop control unit and closed-loop control unit is configured to control the cooling device based on at least one parameter.

4. The hand power tool according to claim 3 , further comprising a sensor unit configured to sense the at least one parameter.

5. The hand power tool according to claim 1 , wherein the at least one of the open-loop control unit and the closed-loop control unit is configured to control the cooling device based on temperature.

6. The hand power tool according to claim 1 , wherein the at least one of the open-loop control unit and closed-loop control unit is configured to control the cooling device based on time.

7. The hand power tool according to claim 1 , wherein the at least one of the open-loop control unit and closed-loop control unit is configured to control the cooling device based on power.

8. The hand power tool according to claim 1 , wherein the first cooling unit includes a first air channel configured to guide a cooling stream from an inlet opening, past the drive unit, to an outlet opening,
wherein the first cooling unit includes a second cooling air channel configured to guide a portion of the cooling stream from an inlet interface to the first cooling channel, past the electronic unit, to the outlet opening, and
wherein the cooling device includes at least one positioning element configured to open and close the inlet interface.

9. The hand power tool according to claim 8 , wherein the at least one of the open-loop control unit and closed-loop control unit is configured to control the at least one positioning element.

10. The hand power tool according to claim 1 , wherein the drive unit includes at least one electrically commutated motor.

11. The hand power tool of claim 1 , wherein the hand power tool is an angle grinder.

12. The hand power tool of claim 1 , wherein said first cooling unit comprises a fan element and said second cooling unit comprises a thermoelectric cooling element.

13. The hand power tool of claim 12 , wherein said second cooling unit contacts the electronic control unit directly.

14. A hand power tool, comprising:
a drive unit;
an electronic unit configured to control the drive unit;
a cooling device including a first cooling unit configured to cool the drive unit and the electronic unit; and
at least one of an open-loop control unit and a closed-loop control unit configured to control the cooling device,
wherein the first cooling unit includes a first air channel configured to guide a cooling stream from an inlet opening, past the drive unit and the electronic unit, to an outlet opening,
wherein the first cooling unit includes a second cooling air channel configured to guide a portion of the cooling stream from an inlet interface to the first cooling channel and past the electronic unit to the outlet opening, and
wherein the cooling device includes at least one positioning element configured to open and close the inlet interface.

15. The hand power tool according to 14 , wherein said inlet interface is connecting the first air channel and the second air channel.

16. The hand power tool of claim 15 , wherein a heat-activated drive element is provided to automatically release or close the inlet interface based on temperature.

17. The hand power tool of claim 16 , wherein said drive element is made of a bimetal.

Assignees

• Bosch Gmbh Robert

Inventors

• Schuele Manfred
• Wanek Helmut
• Boeck Cornelius
• Schadow Joachim
• Maute Joerg
• Esenwein Florian
• Lutz Manfred
• Barth Daniel

Classifications

• B25F5/008

  Cooling means · CPC title

• B23Q11/127 Primary

  for cooling motors or spindles · CPC title

• B24B23/028

  Angle tools · CPC title