Schaeffler Technologies Ag & Co .kg

Ina Schaeffler Kg

Matthias Reichel

Michael Dotterweich

Georg Backert

Norbert Geyer

Alexander Fichtner

A tappet is proposed, for a fuel pump or for a valve timing gear, in each case of an internal combustion engine, comprising a hollow-cylindrical housing, which includes two separate portions lying in line one after the other, which are fitted together in a region of their facing inner faces and are permanently connected to one another by way of a joint. The tappet has a roller on its driving side and an abutment for a follower part on its driven side, which abutment is formed on a separate insert. The abutment is radially supported on the housing in the fitted-together region of the two portions, wherein the insert has a middle annular collar, from which on the one hand a sleeve portion protrudes in the direction of the driving side and on the other hand a dome-like attachment protrudes towards the driven side.

Tappet

The invention relates to a cup tappet for an internal combustion engine, having a skirt which has a radial recess, into which an anti-rotation element () is inserted. The anti-rotation element protrudes from the skirt in the radial direction, in order to be accommodated in a corresponding groove of the cylinder head as an anti-rotation safeguard. According to the invention, the anti-rotation element () has an outer contour in longitudinal section with a head () and a stem (). The stem has a reduced dimension compared with the head () and a thickened portion (), and can be clipped into the recess of the skirt of the cup tappet under elastic deformation of the thickened portion (). In this way, an anti-rotation safeguard is possible which can be assembled particularly simply, can be manufactured cheaply and is reliable.

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Obertrubach, Germany

Matthias Reichel