Input shaft lubrication for gear pump

摘要

A shaft assembly includes a gear with a gear bore having a splined bore section adjacent to an oil dam. A shaft includes a first splined end section and a second splined end section, the first splined end section engageable with the splined inner diameter, the shaft having a bore with a bore diameter greater than a diameter of the oil dam, a first set of radial apertures axially inboard of the first splined end section in communication with the shaft inner bore and a second set of radial apertures axially inboard of the second splined end section in communication with the shaft inner bore that altogether provide lubrication of the splined end sections.

主权项

1. A shaft assembly comprising:
a gear rotatable about an axis, said gear including a gear bore having a splined bore section and an oil dam, said oil dam including a shoulder extending radially inwardly from said gear bore such that said shoulder forms an inner aperture along said axis, said inner aperture having an aperture diameter; and a shaft with a first splined end section engageable with said splined bore section such that there is a reservoir axially between said first splined end section and said shoulder of said gear bore, said shaft having a shaft inner bore with a bore diameter, a first set of radial apertures axially inboard of said first splined end section and in communication with said shaft inner bore and said reservoir across said first splined end section, said bore diameter being greater than said aperture diameter of said inner aperture of said shoulder such that lubricant collects at said oil dam in said reservoir, at said first splined end section, and in said bore diameter until the lubricant in the reservoir flows over the shoulder.