Earth working machine having a rotatable working apparatus axially positionally retainable with high tightening torque by means of a central bolt arrangement, and method for establishing and releasing such retention

US11313087B2 · kind B2 · utility

Assignee

• Wirtgen GmbH

Inventors

• Christian Berning · Euskirchen, DE
• Karsten Buhr · Willroth, DE
• Markus Frankemölle · Hennef (Sieg), DE
• Thomas Lehnert · Oberraden, DE
• Andreas Salz · Linz, DE
• Hardy Wilhelmi · Dattenberg, DE

Key dates

• Filing date: Jul 20, 2020
• Grant date: Apr 26, 2022
• Expiry date: Jul 20, 2040

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16B39/02
• WIPO field: Civil engineering
• WIPO sector: Other fields

Abstract

A replaceable milling drum for an earth working machine includes a milling drum tube and a protrusion structure fixed to the milling drum tube. A bearing stem protrudes from the protrusion structure axially away from a drive axial end of the milling drum tube. The bearing stem has an outer surface including at least first and second cylindrical bearing surfaces axially spaced from each other, a furthest one of the cylindrical bearing surfaces from the drive axial end having a smaller diameter than a next furthest one of the cylindrical bearing surfaces from the drive axial end, the bearing stem having a central opening therethrough co-axial with the drive axis.