Hand tool machine device

Patent metadata

Field	Value
Publication number	US-9844869-B2
Application number	US-201314370933-A
Country	US
Kind code	B2
Filing date	Jan 3, 2013
Priority date	Feb 3, 2012
Publication date	Dec 19, 2017
Grant date	Dec 19, 2017

Abstract

A hand tool machine device with a drive unit comprising at least one drive shaft, a transmission unit including at least one transmission element, a cooling unit including at least one fan element, and at least one sealing element configured to seal the transmission unit in at least on axial direction. The at least one fan element includes at least one receiving region configured to at least partially receive the at least one sealing element.

First claim

The invention claimed is:

1. A hand power tool, comprising:
a hand power tool device including:
a drive unit having at least one drive shaft;
a transmission housing having at least one opening;
a transmission unit having at least one transmission element and a planetary gear, the at least one transmission element positioned in the at least one opening, and the planetary gear positioned in the transmission housing;
a cooling unit having at least one fan element; and
at least one sealing element contacting the transmission element and the transmission housing, and configured to seal the transmission unit in at least one axial direction,
wherein the at least one fan element defines at least one receiving region configured to at least partially receive the at least one sealing element.

2. The hand power tool device as claimed in claim 1 , wherein the at least one sealing element is defined, at least partially, by a sealing ring.

3. The hand power tool device as claimed in claim 1 , wherein the at least one sealing element is at least partially formed of a felt.

4. The hand power tool device as claimed in claim 1 , wherein the at least one fan element is connected at least substantially directly and fixedly to the at least one transmission element.

5. The hand power tool device as claimed in claim 4 , wherein the at least one fan element is pressed, at least partially, on to the at least one transmission element.

6. The hand power tool device as claimed in claim 1 , wherein the at least one transmission element includes:
at least one region with a toothing; and
at least one at least substantially cylindrical region.

7. The hand power tool device as claimed in claim 6 , wherein the at least one sealing element encompasses the at least one transmission element at least partially in the at least one at least substantially cylindrical region.

8. The hand power tool device as claimed in claim 1 , wherein the at least one receiving region has at least one driver element protruding into the at least one sealing element and configured to secure the at least one sealing element in a circumferential direction of the at least one fan element.

Assignees

• Bosch Gmbh Robert

Inventors

• Ullrich Andre
• Froehling Holger

Classifications

• H02K9/06

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

• H02K7/145

  Hand-held machine tool · CPC title

• B25F5/008 Primary

  Cooling means · CPC title

• B25F5/02

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

• H02K7/116

  with gears · CPC title