Hand-held power tool, fanless storage battery

Patent metadata

Field	Value
Publication number	US-10675745-B2
Application number	US-201515531985-A
Country	US
Kind code	B2
Filing date	Nov 30, 2015
Priority date	Dec 1, 2014
Publication date	Jun 9, 2020
Grant date	Jun 9, 2020

Abstract

A hand-held power tool, in particular a hammer drill or a combination hammer, is disclosed. The hand-held power tool includes a tool housing which has a receiving recess designed to replaceably receive a storage battery or a power supply unit. The hand-held power tool has an electric drive motor with a cooling fan. The tool housing has a first vent portion which is located in the receiving recess and through which a volume flow generated by the cooling fan can be guided.

First claim

The invention claimed is:

1. A hand-held power tool, comprising:
a tool housing which has a receiving recess, wherein a storage battery or a power supply unit is replaceably receivable in the receiving recess; and
an electric drive motor with a cooling fan disposed within the tool housing;
wherein the tool housing has a first vent portion which is disposed in the receiving recess and wherein a volume flow generated by the cooling fan is guidable through the first vent portion;
wherein the tool housing has a second vent portion, wherein the second vent portion is disposed outside of the receiving recess, and wherein the volume flow generated by the cooling fan is at least partially guidable through the second vent portion; and
a flow control means, wherein the volume flow generated by the cooling fan is distributable between the first vent portion and the second vent portion by the flow control means.

2. The hand-held power tool according to claim 1 , wherein the hand-held power tool is a hammer drill or a combination hammer.

3. The hand-held power tool according to claim 1 , wherein the volume flow is guidable through a storage battery disposed in the receiving recess.

4. The hand-held power tool according to claim 1 , wherein the flow control means is regulatable depending on a temperature value measured in a storage battery disposed in the receiving recess.

5. The hand-held power tool according to claim 1 , wherein the flow control means is regulatable depending on at least one temperature value measured in the hand-held power tool.

6. The hand-held power tool according to claim 1 , wherein the flow control means is a change-over flap that is actuatable by a control device, wherein the change-over flap closes the first vent portion in a first switch position and closes the second vent portion in a second switch position.

7. The hand-held power tool according to claim 6 , wherein the change-over flap is settable in a third switch position between the first switch position and the second switch position.

8. The hand-held power tool according to claim 1 , wherein the first vent portion and the second vent portion are each associated with a respective vent.

9. A fanless storage battery in combination with the hand-held power tool according to claim 1 , comprising:
an inner ventilation channel in the fanless storage battery that is open to an environment, wherein the fanless storage battery is force-coolable by a volume flow generated by the cooling fan of the hand-held power tool via the inner ventilation channel when the fanless storage battery is disposed in the receiving recess of the hand-held power tool.

Assignees

• Hilti Ag

Inventors

• Meixner Ralf
• Jakob Manfred
• Thanner Thomas

Classifications

• H01M10/6235

  Power tools · CPC title

• H01M2220/30

  Batteries in portable systems, e.g. mobile phone, laptop · CPC title

• B25D11/00

  Portable percussive tools with electromotor {or other motor} drive · CPC title

• B25D17/20

  Devices for cleaning or cooling tool or work · CPC title

• B25D16/00

  Portable percussive machines with superimposed rotation {, the rotational movement of the output shaft of a motor being modified to generate axial impacts on the tool bit (combined percussion and rotary drilling adapted for earth drilling E21B6/00)} · CPC title