Tool device for a ground milling machine and ground milling machine having such a tool device

US10018041B2 · kind B2 · utility

Assignee

• BOMAG GmbH · DE

Inventors

• Steffen Wachsmann · Koblenz, DE
• Markus Schaefer · Braubach, DE

Key dates

• Filing date: Nov 5, 2015
• Grant date: Jul 10, 2018
• Expiry date: Nov 5, 2035

Classification

• Technology area (CPC E): Fixed Constructions
• CPC primary: E21C35/1831
• WIPO field: Civil engineering
• WIPO sector: Other fields

Abstract

The invention relates to a tool device for a ground milling machine, particularly a road milling machine, a recycler, a stabilizer or a surface miner. The tool device comprises a milling chisel with a highly wear-resistant chisel tip, particularly comprising PCD material, and a chisel shaft extending along a longitudinal axis, and a chisel holder with a shaft receptacle, the chisel shaft of the milling chisel having at least one tapering section narrowing in a direction away from the chisel tip. Furthermore, a fastening device is provided, which is designed in such a way that it pulls the milling chisel along its longitudinal axis and in the direction away from the chisel tip into the shaft receptacle, the shaft receptacle of the chisel holder being designed complementary to the chisel shaft of the milling chisel in such a way that the tapering section, when braced by the fastening device, bears against the chisel holder in the shaft receptacle in a frictionally locking manner shaft receptacle. The chisel holder also comprises a base holder and a quick-change chisel holder, the base holder comprising a holder receptacle for receiving the quick-change chisel holder, and the quick-ch…