Wear protection cap

Patent metadata

Field	Value
Publication number	US-9782889-B2
Application number	US-201514831967-A
Country	US
Kind code	B2
Filing date	Aug 21, 2015
Priority date	Sep 1, 2014
Publication date	Oct 10, 2017
Grant date	Oct 10, 2017

Abstract

The invention relates to a wear protection cap for a bit holder arrangement, having at least two panel segments, located at an angle to one another, for covering surface regions of the bit holder arrangement, the panel segments being integrally joined to one another and the wear protection cap being configured as a cast metal part or as a forged metal part. With a wear protection cap of this kind, the service life of a bit holder arrangement can be substantially improved and machine stoppage time can be decreased.

First claim

The invention claimed is:

1. A wear protection cap for a bit holder arrangement, the wear protection cap comprising:
at least two panel segments located at an angle to one another for covering surface regions of the bit holder arrangement, the panel segments being integrally joined to one another as a primary-formed metal part or as a reshaped metal part, the at least two panel segments including a front panel segment, a top panel segment, and two side panel segments;
a first transitional region between the top panel segment and the front panel segment, the first transitional region being of enlarged thickness relative to the top panel segment;
a second transitional region between the top panel segment and at least one of the side panel segments, the second transitional region joining the first transitional region, the second transitional region being of enlarged thickness relative to the top panel segment; and
wherein the top panel segment is recessed from the first and second transitional regions of enlarged thickness.

2. The wear protection cap of claim 1 , wherein:
the wear protection cap is formed as a hot formed part, either as a cast part or as a forged part.

3. The wear protection cap of claim 1 , wherein:
at least one of the panel segments leads into another of the panel segments via a radius transition.

4. The wear protection cap of claim 1 , wherein:
the top and front panel segments are arranged to rest on corresponding flat support surfaces of a base part of the bit holder arrangement to support the wear protection cap against forces that impinge on the wear protection cap during use of the bit holder arrangement.

5. The wear protection cap of claim 1 , wherein:
the wear protection cap is configured for covering surface regions of a base part of the bit holder arrangement.

6. The wear protection cap of claim 1 , wherein:
the wear protection cap has a recess defined therein between the front panel segment and one of the side panel segments, the recess extending through the first transitional region of enlarged thickness.

7. A wear protection cap for a bit holder arrangement, the wear protection cap comprising:
at least two panel segments located at an angle to one another for covering surface regions of the bit holder arrangement, the panel segments being integrally joined to one another as a primary-formed metal part or as a reshaped metal part, the at least two panel segments including a front panel segment, a top panel segment, and two side panel segments;
a first transitional region between the top panel segment and the front panel segment, the first transitional region being of enlarged thickness relative to the top panel segment;
a second transitional region between the top panel segment and at least one of the side panel segments, the second transitional region joining the first transitional region, the second transitional region being of enlarged thickness relative to the top panel segment; and
wherein the wear protection cap has a recess defined therein between the front panel segment and one of the side panel segments, the recess extending through the first transitional region.

8. The wear protection cap of claim 7 , wherein:
the wear protection cap is formed as a hot formed part, either as a cast part or as a forged part.

9. The wear protection cap of claim 7 , wherein:
the front panel segment leads into the top panel segment via a radius transition.

10. The wear protection cap of claim 7 , wherein:
the top and front panel segments are arranged to rest on corresponding flat support surfaces of a base part of the bit holder arrangement to support the wear protection cap against forces that impinge on the wear protection cap during use of the bit holder arrangement.

11. A wear protection cap for covering surface regions of a bit holder of a bit holder arrangement, the wear protection cap comprising:
at least two panel segments located at an angle to one another for covering surface regions of the bit holder arrangement, the panel segments being integrally joined to one another as a primary-formed metal part or as a reshaped metal part, the at least two panel segments including:
a front panel segment having an aperture defined therein, the aperture configured to receive a head of a shank bit;
a top panel segment adjacent to a rear side of the front panel segment, the top panel segment including a convex discharge surface; and
two side panel segments, the side panel segments being spaced apart from one another and being joined integrally to the top panel segment and to a rear side of the front panel segment, the convex discharge surface of the top panel segment extending from one side panel segment to the other side panel segment.

12. The wear protection cap of claim 11 , wherein:
the wear protection cap is formed as a hot formed part, either as a cast part or as a forged part.

Assignees

• Wirtgen Gmbh

Inventors

• Lemmey Paul Anthony
• Roney Brett George
• Moorby Jamie Sinclair

Classifications

• E21C35/1837

  characterised by the shape · CPC title

• E21C35/18 Primary

  Mining picks; Holders therefor (planing knives E21C27/44) · CPC title

• B25H3/003 Primary

  Holders for drill bits or the like · CPC title

• E21C35/183

  with inserts or layers of wear-resisting material {(drill bits with wear-resistant parts E21B10/46)} · CPC title

• E21C2035/1816

  Fixed Constructions · mapped topic