Roller tappet for a fuel pump
AssigneeSchaeffler Technologies AG & Co. KG
InventorNorbert Geyer
Life of this patent
Estimating the term…
Abstract
A roller tappet for a fuel pump includes an integral and hollow-walled guide housing, which has a drive-side edge that encloses a roller mounted on a pin. The ends of the pin are seated in openings in arranged in indented flat surfaces that originate from the drive-side edge and are diametrically opposite each other. An output-side edge of the guide housing has a bridge piece that extends continuously from an inner wall of the one of the flat surfaces to an inner wall of the other flat surface. The bridge piece projects beyond the inner wall towards the outer wall of the particular flat surface, and the output-side outer face of the bridge piece has a contact surface for a pump piston. The flat surfaces are completely continuous from the drive-side edge to the output-side edge of the guide housing.
Claims19
A roller tappet for a fuel pump, the roller tappet comprising:
- an integral and hollow-walled guide housing having:
- a drive-side edge enclosing a roller mounted on a pin, a first end of the pin seated in a first opening arranged in a first indented flat surface of the hollow-walled guide housing, and a second end of the pin seated in a second opening arranged in a second indented flat surface of the guide housing, the first and second indented flat surfaces originating from the drive-side edge of the guide housing and arranged diametrically opposite each other,
- a bridge arranged at an output-side end of the guide housing, the bridge extending continuously from a first inner wall of the first indented flat surface to a second inner wall of the second indented flat surface, an output-side outer face of the bridge having a contact surface configured for a pump piston, and the first and second indented flat surfaces extending continuously from the drive-side edge to an output-side edge of the guide housing, and
- the bridge has a first end region seated in a first receptacle of the first indented flat surface, and a second end region seated in a second receptacle of the second indented flat surface, and
- the first and second receptacles pass through each wall of the first and second indented flat surfaces, and
- the contact surface of the bridge is formed by a longitudinal flattened portion.
A roller tappet comprising:
- a hollow-walled guide housing of one-piece construction, the hollow-walled guide housing having:
- a drive-side edge,
- an output-side edge,
- a first indented flat extending continuously in an axial direction from the drive-side edge to the output-side edge, the first indented flat having a first opening and a first receptacle,
- a second indented flat extending continuously in the axial direction from the drive-side edge to the output-side edge, the second indented flat:
- i) having a second opening and a second receptacle, and ii) arranged diametrically opposite to the first indented flat, and
- a roller arranged protruded relative to the drive-side edge, the roller supported by a pin disposed within first and second openings, and
- a bridge having a first end disposed within the first receptacle and a second end disposed within the second receptacle, the first and second receptacles extending through each wall of the first and second indented flats, and
- the bridge formed with a flat surface configured to receive a follower element.
A roller tappet comprising:
- a hollow-walled guide housing of one-piece construction, the hollow-walled guide housing having:
- a drive-side edge,
- an output-side edge,
- a first indented flat extending continuously in an axial direction from the drive-side edge to the output-side edge, the first indented flat having a first opening and a first receptacle,
- a second indented flat extending continuously in the axial direction from the drive-side edge to the output-side edge, the second indented flat:
- i) having a second opening and a second receptacle, and ii) arranged diametrically opposite to the first indented flat,
- a roller arranged protruded relative to the drive-side edge, the roller supported by a pin disposed within first and second openings, and
- a bridge having a first end disposed within the first receptacle and a second end disposed within the second receptacle, the first and second ends extending through each wall of the first and second indented flats, and
- the bridge configured to receive a follower element.
Dependencies are inferred from the claim text.