Multi-part roller tappet
AssigneeSchaeffler Technologies AG & Co. KG
InventorNorbert Geyer
Life of this patent
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Abstract
A roller tappet, in particular for a high-pressure fuel pump, is provided that is guided in the direction of the longitudinal axis thereof in a housing receptacle and is driven translatably in the longitudinal direction by cams of a camshaft. The roller tappet has a tappet body. This tappet body has a tappet skirt, a pump piston contact point (9), and a rotatably mounted roller (4), by which the roller tappet is supported on the camshaft. The tappet body has a guide cylinder (1), which is mounted in the housing receptacle and on which the roller (4) is supported, and a cup-shaped sleeve (7) having the pump piston contact point (9), which cup-shaped sleeve is supported in the guide cylinder (1) by a radial ring (8). A cylindrical constriction (5) is formed in the guide cylinder (1) in the region of the radial ring support.
Claims8
A roller tappet for a high-pressure fuel pump, which is adapted to be guided in a longitudinal direction of the roller tappet in a housing receptacle and is adapted to be driven displaceably in the longitudinal direction by cams of a camshaft, the roller tappet comprising:
- a guide cylinder adapted to be received in the housing receptacle, the guide cylinder including a tappet skirt and a cylindrical constriction,
- a cup-shaped sleeve arranged inside the guide cylinder, the sleeve including a pump piston contact point and a radially outwardly projecting radial ring, and
- a roller rotatable mounted to the guide cylinder, the roller arranged at least partially within the tappet skirt,
- wherein:
- the roller tappet is supported on the camshaft via the roller,
- the cylindrical constriction includes a constriction groove, and
- the radial ring is attached to an inner surface of the guide cylinder at a location corresponding to the constriction groove.
A roller tappet for a high-pressure fuel pump, the roller tappet comprising:
- a guide cylinder adapted to be received in a housing receptacle, the guide cylinder including a cylindrical constriction,
- a roller rotatably supported on the guide cylinder, the roller adapted to contact a cam, and
- a cup-shaped sleeve arranged inside the guide cylinder, the sleeve including a pump piston contact point and a radially outwardly projecting radial ring,
- wherein the cylindrical constriction includes a constriction groove, and
- wherein the radial ring of the cup-shaped sleeve is attached to an inner surface of the guide cylinder at a location corresponding to the constriction groove.
Dependencies are inferred from the claim text.