Structural assembly comprising a pump piston and a tappet

US8627801B2 · kind B2 · utility

Assignee

• Schaeffler Technologies AG & Co. KG · DE

Inventors

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

Key dates

• Filing date: Mar 15, 2011
• Grant date: Jan 14, 2014
• Expiry date: Jun 5, 2032

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T74/2107
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A structural assembly (1) for a high pressure fuel pump, with the structural assembly (1) having a tappet (3) connected to a pump piston (2), which bears frontally against a contact surface (7) of an inner side (8) of the bottom (5) of the pump piston (2), the bottom (5) being connected to a guide skirt (10) of the tappet (3). An outer peripheral wall (11) of the pump piston (2) is surrounded near the inner side (8) with radial lash by a bore (12) of a spring plate (13) on whose bottom-distal side (14) a coil compression spring (15) bears for resetting the pump piston (2), and a bottom side (16) of the spring plate (13) is situated opposite an annular surface (17) of an entraining collar (18) on the pump piston (2). The entraining collar (18) is a separate, disk-like element seated on the pump piston (2) with slight axial distance to the spring plate (13), which spring plate (13) possesses a disk section (19) with the bottom side (16) having the bore (12). A concentric bushing (21) projects from the outer edge (20) of the disk section (19) in direction of the bottom (5) and surrounds the entraining collar (18) with radial lash, which bushing (21) merges into an annular collar secti…