Mini disk bit

US6935443B2 · kind B2 · utility

Assignee

• MAN TAKRAF Fördertechnik GmbH · DE

Inventors

• Alexander Ehler · Dresden, DE
• Gunter Kunze · Freital, DE
• Volkmar Schrader · Schwarzheide, DE

Key dates

• Filing date: Nov 27, 2002
• Grant date: Aug 30, 2005
• Expiry date: Feb 5, 2023

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16C43/06
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A small sized disk bit includes a bit holder accommodated in a bearing journal on its side (overhangingly), and a disk body with asymmetrically designed wedge flanks mounted rotatably thereon. To enable the disk body to absorb high radial and axial strong forces encountered during the engagement of the disk on a solid rock, the disk body is designed as a one-part disk body with a blind hole with its surface and the bearing journal surface being designed as components of the bearing. The bearing involves the combination of a radial and thrust bearing each, where the thrust bearing is milled into the track of the radial bearing. A ball bearing is used as the axial bearing and a needle roller bearing, a cylindrical roller bearing or a slide bearing is used as the radial bearing. The diameter of the ball bearing is larger than the diameter of the needle rollers, or the cylindrical rollers or the thickness of the sliding bush of the slide bearing.