Self-propelled ground milling machine and method for working on a traffic surface

US10655285B2 · kind B2 · utility

Assignee

• Wirtgen GmbH

Inventors

• Christian Berning · Euskirchen, DE
• Philip Verhaelen
• Cyrus Barimani · Rübhausen, DE

Key dates

• Filing date: Oct 24, 2018
• Grant date: May 19, 2020
• Expiry date: Oct 24, 2038

Classification

• Technology area (CPC E): Fixed Constructions
• CPC primary: E01C23/127
• WIPO field: Civil engineering
• WIPO sector: Other fields

Abstract

A self-propelled ground milling machine includes a working roller, a hold-down device which is height-adjustable with respect to the traffic surface being arranged upstream of the working roller in the working direction, and a detection unit which determines a physical variable characteristic of an undesirable state of the operating process, wherein fragments are broken off from the traffic surface, apply compressive force to the hold-down device and can press the hold-down device into a raised position with respect to the traffic surface. A device for height-adjusting the hold-down device responds by applying a contact pressure, directed counter to the compressive force applied by the fragments, to the hold-down device. By applying sufficient contact pressure, the hold-down device can be effectively prevented from rising from the traffic surface, such a way that during the milling process it is at least made more difficult for fragments to break off undesirably from the traffic surface.