Work apparatus

Patent metadata

Field	Value
Publication number	US-12521864-B2
Application number	US-202418602777-A
Country	US
Kind code	B2
Filing date	Mar 12, 2024
Priority date	Mar 14, 2023
Publication date	Jan 13, 2026
Grant date	Jan 13, 2026

Abstract

A work apparatus has a tool, which can be driven in a rotating manner around a rotational axis. The work apparatus has a protective hood extending over at least a part of the periphery of the tool. The protective hood is attached to a housing part of the work apparatus. At least two rotation locks for the protective hood are arranged in different angular positions around the rotational axis. Each rotation lock is formed by virtue of the fact that one of the components of the protective hood and the housing part has a protruding section cooperating with a section of the other component of the protective hood and the housing part and securing the protective hood on the housing part in a positive-locking manner against rotation around the rotational axis, so that the protective hood is prevented from moving with respect to the housing part around the rotational axis.

First claim

The invention claimed is:

1 . A work apparatus comprising:
a tool configured to be driven in a rotating manner around a rotational axis; a protective hood extending over at least a part of a periphery of said tool; said protective hood being attached to a housing part of the work apparatus; at least two rotation locks for said protective hood which are arranged in different angular positions around said rotational axis and prevent said protective hood from moving with respect to said housing part around said rotational axis; a first one of said protective hood and said housing part being a first component; a second one of said protective hood and said housing part being a second component,
wherein said first component differs from said second component; and,
each of said at least two rotation locks being configured such that said first component has a protruding section which cooperates with a section of said second component and secures said protective hood on said housing part in a positive-locking manner against rotation around said rotational axis, so that said protective hood is prevented from moving with respect to said housing part around said rotational axis.

2 . The work apparatus of claim 1 , wherein said protective hood is attached to said housing part of the work apparatus via at least one fastening element.

3 . The work apparatus of claim 2 , wherein, to provide the positive-locking security against rotation around said rotational axis, said protruding section engages in a receptacle of the second component of said protective hood and said housing part and said at least one fastening element protrudes into said protruding section.

4 . The work apparatus of claim 2 , wherein the first component of said protection hood and said housing part has at least one screw boss which forms said protruding section; and, said at least one fastening element is a fastening screw that is screwed into said screw boss.

5 . The work apparatus of claim 1 , wherein a first edge is formed on said protective hood and a second edge is formed on said housing part; and, said first edge and said second edge engage with each other and thereby secure said protective hood on said housing part in the positive-locking manner against rotation around said rotational axis.

6 . The work apparatus of claim 5 , wherein at least one of said first edge and said second edge is non-circular.

7 . The work apparatus of claim 5 , wherein at least one of said first edge and said second edge runs around said rotational axis.

8 . The work apparatus of claim 5 , wherein a maximum distance of 2 mm is formed between said first edge and said second edge; and, said maximum distance is measured perpendicular to said rotational axis.

9 . The work apparatus of claim 5 , wherein said first edge engages over said second edge.

10 . The work apparatus of claim 1 , wherein said protruding section is arranged on said protective hood.

11 . The work apparatus of claim 1 , wherein a plurality of protruding sections are provided which are interconnected via a plurality of ribs.

12 . The work apparatus of claim 1 , wherein the work apparatus is a cut-off machine having a drive motor and said housing part, to which said protective hood is attached, is an outrigger of the cut-off machine.

13 . The work apparatus of claim 1 , wherein at least three of said rotation locks are provided and an angular distance between two of said at least three rotation locks that are adjacent in a peripheral direction around the rotational axis is not equal for all adjacent ones of said at least three rotation locks.

14 . A work apparatus comprising:
a tool configured to be driven in a rotating manner around a rotational axis; a protective hood extending over at least a part of a periphery of said tool; said protective hood being attached to a housing part of the work apparatus; at least two rotation locks for said protective hood which are arranged in different angular positions around said rotational axis; a first one of said protective hood and said housing part being a first component; a second one of said protective hood and said housing part being a second component, wherein said first component differs from said second component; said first component having a protruding section which cooperates with a section of said second component and secures said protective hood on said housing part in a positive-locking manner against rotation around said rotational axis, so that said protective hood is prevented from moving with respect to said housing part around said rotational axis; wherein a first edge is formed on said protective hood and a second edge is formed on said housing part; and, said first edge and said second edge engage with each other and thereby secure said protective hood on said housing part in the positive-locking manner against rotation around said rotational axis; and, wherein at least one protruding section is formed by an elevation on one of said first edge and said second edge and engages in a depression of the other of said first edge and said second edge and forms therewith at least one rotation lock.

15 . A work apparatus comprising:
a tool configured to be driven in a rotating manner around a rotational axis; a protective hood extending over at least a part of a periphery of said tool; said protective hood being attached to a housing part of the work apparatus; at least two rotation locks for said protective hood which are arranged in different angular positions around said rotational axis; a first one of said protective hood and said housing part being a first component; a second one of said protective hood and said housing part being a second component, wherein said first component differs from said second component; said first component having a protruding section which cooperates with a section of said second component and secures said protective hood on said housing part in a positive-locking manner against rotation around said rotational axis, so that said protective hood is prevented from moving with respect to said housing part around said rotational axis; wherein said protective hood is attached to said housing part via at least one first fastening element and at least one second fastening element; and, said at least one first fastening element and said at least one second fastening element are at different distances from said rotational axis.

Assignees

• Stihl Ag & Co Kg Andreas

Inventors

• Haertel Alexander
• Willems Fabian
• Pfister Gregor
• Barth Benjamin

Classifications

• B23Q11/08

  Protective coverings for parts of machine tools; Splash guards · CPC title

• B23D45/16

  Hand-held sawing devices with circular saw blades · CPC title

• B28D1/04

  with circular {or cylindrical} saw-blades or saw-discs (B28D1/10 takes precedence) · CPC title

• B27G19/025

  with guards for tool · CPC title

• B24B27/08

  being portable · CPC title