Tappet

US9938945B2 · kind B2 · utility

Assignee

• Schaeffler Technologies AG & Co. KG · DE

Inventors

• Stefan Dorn · Hollfeld, DE
• Norbert Geyer · Hochstädt, DE

Key dates

• Filing date: May 24, 2013
• Grant date: Apr 10, 2018
• Expiry date: Oct 29, 2034

Classification

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

Abstract

A plunger (1) for a high-pressure fuel pump is proposed, having a housing (2) which is similar to a tube and in the drive-side annular face (3) of which two flats (5) lie diametrically opposite one another which are indented from an outer shell (4) of the housing (2) and in which a pin (7) is mounted which supports a roller, wherein an inner shell (8) of the housing (2) is penetrated axially below the roller by a separate bridge piece (9), the lower face (10) of which acts as a rest for a pump piston in the case of an output-side annular face (11) of the housing (2), wherein the bridge piece (9) is fixed against rotation about an axial line of the housing (2) and is configured as a thick-walled longitudinal beam, with the result that an area (13) in the manner of a cylindrical segment remains between the longitudinal walls (12) of said longitudinal beam and the inner shell (8) of the housing (2), wherein, in order to fix the bridge piece (9) against rotation about the axial line of the housing (2), in the circumferential section of the inner shell (8) of the housing (2), in a first transverse wall (14) of the bridge piece (9), at least one projection (15) protrudes from one of the …