Countershaft

摘要

A countershaft as disclosed herein may include one or more bearing zones along its axial length. Each bearing zone may include one or more radial holes in fluid communication with one or more grooves, respectively, and one or more axial channels formed along the longitudinal length of the countershaft. Each groove may be positioned adjacent an interface between a rotating member and a non-rotating member and include one or more features therein, such as a profile and/or taper.

主权项

1. A countershaft comprising:
a. an axial channel formed along the longitudinal axis of said countershaft; b. a first bearing zone formed on an exterior surface of said countershaft, wherein said first bearing zone includes a groove and a taper positioned adjacent one another, and wherein said first bearing zone includes a land positioned adjacent said groove on a side of said groove opposite said taper such that a circumference of said first bearing zone is asymmetric on either side of said groove; c. a second bearing zone formed on said exterior surface of said countershaft, wherein said second bearing zone includes a groove and a taper positioned adjacent one another, wherein said second bearing zone includes a land positioned adjacent said groove on a side of said groove opposite said taper such that a circumference of said second bearing zone is asymmetric on either side of said groove, and wherein said groove in said first zone and said groove in said second zone are rotationally offset from one another; d. a first radial hole formed in said countershaft, wherein said first radial hole fluidly connects said axial channel to said groove in said first bearing zone; and, e. a second radial hole formed in said countershaft, wherein said second radial hole fluidly connects said axial channel to said groove in said second bearing zone.