Mechanical roller tappet for an internal combustion engine

US8104442B2 · kind B2 · utility

Assignee

• Schaeffler KG · DE

Inventors

• Stefan Dorn · Hollfeld, DE
• Norbert Geyer · Hochstädt, DE
• Manfred Jansen · Weisendorf, DE
• Karsten Kucht · Herzogenaurach, DE
• Norbert Radinger · Nuremberg, DE

Key dates

• Filing date: Jan 22, 2008
• Grant date: Jan 31, 2012
• Expiry date: Jan 10, 2029

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F01L2307/00
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A mechanical roller tappet (1a, 1b) comprising a tappet housing (2a, 2b) shaped out of sheet metal, a drive roller (3) actuable by a cam (9) and an axle (5a, 5b) on which the drive roller (3) is mounted, end portions (24) of the axle (5a, 5b) being supported in axle eyes (23) of the tappet housing (2a, 2b), said tappet housing (2a, 2b) comprising a tappet skirt (10a, 10b) and a tappet bottom (16) possessing a contact surface (21) for an adjacent engine component on a power take-off side and at an end of the tappet skirt facing the cam, the tappet bottom is connected to the tappet skirt and is shaped into the interior of the tappet skirt while forming a pocket for receiving the drive roller, the axle eyes being arranged in first sections (18) of the tappet bottom while being spaced from an inner peripheral surface (19) of the tappet skirt and extend substantially parallel to the longitudinal direction of the tappet skirt, the contact surface being arranged on a second section (20) of the tappet bottom connecting the first sections to each other.