Plunger pump tappet assembly and roller thereof
AssigneeRobert Bosch GmbH
InventorsKai Shi, Wei Zhang
Life of this patent
Estimating the term…
Abstract
A plunger pump includes a plunger pump tappet assembly and a roller. The roller includes a revolving body configured to revolve along a central axis. The revolving body includes logarithmic parts and a straight part which are integrally formed. The logarithmic parts are symmetrically provided at two ends of the straight part in an axial direction of the central axis. In a cross section of the revolving body along and through the central axis, an outline of the straight part forms a straight line, and an outline of the logarithmic part forms a logarithmic curve, with an X-axis lying along the central axis, and a perpendicular bisector of the X-axis as a Y-axis.
Claims6
A roller for a tappet assembly of a plunger pump, comprising:
- a revolving body configured to revolve along a central axis, the revolving body having logarithmic parts and a straight part integrally formed with the logarithmic parts,
- wherein the logarithmic parts are symmetrically located at two ends of the straight part in an axial direction of the central axis,
- wherein a cross section of the revolving body, along and through the central axis, defines an outline including (i) an outline portion of the straight part that forms a straight line, and (ii) another outline portion of the straight part and the logarithmic part that forms a logarithmic curve,
- wherein an upper edge along the outline defines an X-axis, and
- wherein a line perpendicular to the X-axis and passing through an axial center of the roller defines a Y-axis.
A tappet assembly, comprising:
- a tappet defining a receiving slot;
- and
- a roller disposed in the receiving slot, the roller including a revolving body configured to revolve along a central axis, the revolving body having logarithmic parts and a straight part integrally formed with the logarithmic parts,
- wherein the logarithmic parts are symmetrically located at two ends of the straight part in an axial direction of the central axis,
- wherein a cross section of the revolving body, along and through the central axis, defines an outline including (i) an outline portion of the straight part that forms a straight line, and (ii) another outline portion of the straight part and the logarithmic part that forms a logarithmic curve,
- wherein an upper edge along the outline defines an X-axis, and
- wherein a line perpendicular to the X-axis and passing through an axial center of the roller defines a Y-axis.
Dependencies are inferred from the claim text.