Hand power tool having a drum-type tool change magazine

Patent metadata

Field	Value
Publication number	US-9776295-B2
Application number	US-201514968995-A
Country	US
Kind code	B2
Filing date	Dec 15, 2015
Priority date	Nov 29, 2011
Publication date	Oct 3, 2017
Grant date	Oct 3, 2017

Abstract

A hand power tool includes a tool receiver configured to receive a tool. The tool has an outer polygonal coupling and the tool receiver has an inner receiver including, at least portionally, a rotary driver profile. The tool receiver is provided on an associated tool housing, in which there is a drum-type tool change magazine having at least one tool chamber configured to store the tool. The tool chamber is configured to be aligned so as to be flush with the tool receiver to enable the tool to slide from the tool chamber into the inner receiver or from the inner receiver into the tool chamber. An alignment element is configured to align the outer polygonal coupling as the tool slides from the tool chamber into the inner receiver to enable the outer polygonal coupling to slide into the rotary driver profile.

First claim

What is claimed is:

1. A hand power tool comprising:
a tool having an outer polygonal coupling;
a tool housing including a drum-type tool change magazine having at least one tool chamber configured to store the tool;
a tool receiver arranged on the tool housing and configured to be rotated about a longitudinal axis of the tool receiver, wherein the tool receiver is configured to receive the tool and has an inner receiver provided, at least portionally, with a rotary driver profile, and wherein the at least one tool chamber is configured to be aligned so as to be flush with the tool receiver to enable the tool to slide from the at least one tool chamber into the inner receiver or from the inner receiver into the at least one tool chamber; and
an alignment element configured to align the outer polygonal coupling with the rotary driver profile as the tool slides from the at least one tool chamber into the inner receiver to enable the outer polygonal coupling to slide into the rotary driver profile of the inner receiver,
wherein the alignment element has a spring element configured to apply an associated spring force to the outer polygonal coupling, the spring element being embodied as a hoop spring having a circular cross-section when viewed in a direction perpendicular to the longitudinal axis of the tool receiver.

2. The hand power tool according to claim 1 , wherein the alignment element is configured to turn the tool about the longitudinal axis such that the outer polygonal coupling is correspondingly aligned with the rotary driver profile of the inner receiver.

3. The hand power tool according to claim 1 , wherein:
the tool receiver has at least one opening, in which the spring element at least portionally engages, and
the at least one opening opens in a direction transverse to the longitudinal axis.

4. The hand power tool according to claim 3 , wherein the at least one opening is configured to enable the spring element to access the outer polygonal coupling.

5. The hand power tool according to claim 3 , wherein the spring element has at least one spring arm, which engages, at least portionally, in the at least one opening.

6. The hand power tool according to claim 5 , wherein:
the at least one spring arm is configured to apply a spring force to the outer polygonal coupling in the inner receiver of the tool receiver, and
the spring force is directed inwardly in a direction transverse to the longitudinal axis.

7. The hand power tool according to claim 1 , wherein the spring element has a first spring arm and a second spring arm which are connected to each other via a connecting arm, wherein the connecting arm is elastically deformable to enable the first spring arm and the second spring arm to be bent in mutually opposite directions.

8. The hand power tool according to claim 7 , wherein when the connecting arm is not elastically deformed, the first spring arm and the second spring arm are spaced apart from each other by a spacing that corresponds at least to a spacing between two opposing side faces of the outer polygonal coupling.

9. The hand power tool according to claim 7 , wherein the connecting arm is embodied in the form of a pointed hoop having a point which defines a bend location for the spring arms.

10. The hand power tool according to claim 1 , wherein the spring element has a first spring arm and a second spring arm, the first and second spring arms being disposed transversely relative to the longitudinal axis of the tool receiver.

Assignees

• Bosch Gmbh Robert

Inventors

• Nagy Attila

Classifications

• B23Q3/15766 Primary

  the axis of the stored tools being arranged perpendicularly to the rotating or circulating plane of the storage means · CPC title

• B25F5/029

  with storage compartments (B25F5/027 takes precedence; handles with provisions for storing tool elements B25C1/08) · CPC title

• B25F1/04

  wherein the elements are brought into working positions by a pivoting or sliding movement · CPC title

• B23Q2003/1553

  by rectilinear projection · CPC title

• Y10T483/1755

  Plural tool holders pivotable about common axis · CPC title