Cutting element and holder for a coal cutting machine

US5573308A · kind A · utility

Assignee

• Wirtgen GmbH

Inventors

• Dieter Simons · Kürten, DE
• Bernd Holl · Linz, DE

Key dates

• Filing date: May 26, 1995
• Grant date: Nov 12, 1996
• Expiry date: May 26, 2015

Classification

• Technology area (CPC E): Fixed Constructions
• CPC primary: E21C35/191
• WIPO field: Civil engineering
• WIPO sector: Other fields

Abstract

A cylindrical cutting element for a coal cutting machine with a reamer-conveyor worm or reamer spiral for a coal cutting, disposed projecting at a distance from the surface of the cutting element and comprising base elements attached at uniform distances. A chisel holder with an exchangeable chisel is connected to each base element. The chisel holder is inserted with its plug-in connector into a socket of the base element and is maintained therein by a pressure screw. A time-saving assembly of a cutting element, wherein the base elements can be positioned on and fastened to the surface of the cutting element in a simple manner is attained where receiver pockets are cut along the reamer-conveyor worm or reamer spiral at uniform distances into the surface of the cutting element, the undersides of the base elements end in a base whose cross section is matched to the receiver pockets, and the base elements are introduced, positioned by the base, into a receiver pocket and are fixedly connected thereto.