Mechanism for lubricating an output pilot bearing of a gear transmission

• US 4,317,386 A
• Filed: 12/28/1979
• Issued: 03/02/1982
• Est. Priority Date: 10/22/1979
• Status: Expired due to Term

• Current Assignee: Toyota Jidosha Kogyo Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kogyo Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Ohshima, Shoichi, Ida, Shiuichiro, Hirashima, Shunichi
• Primary Examiner(s): Husar, C. J.
• Assistant Examiner(s): Berman, Conrad
• Application Number:
  US06/107,857
• Time in Patent Office: 795 Days
• Field of Search: 74/467, 74/468, 74/339, 74/369, 74/377, 184/6.12, 184/11 R, 192/113 B, 308/187
• US Class Current: 74/467
• CPC Class Codes: F16H 3/08 exclusively or essentially with continuously meshing gears, that can be disengaged from their shafts
• CPC Class Codes: F16H 3/0915 with coaxial input and output shafts
• CPC Class Codes: F16H 57/043 within rotary parts, e.g. axial channels or radial openings in shafts
• CPC Class Codes: F16H 57/0469 Bearings or seals
• CPC Class Codes: Y10T 74/19991 Lubrication

Abstract

A gear transmission including a casing containing lubrication oil therein, an input gear rotatably mounted in the casing, an output power shaft being supported at one end thereof in the input gear through an output pilot bearing and being rotatable with respect to the input gear, and a gear piece rigidly secured to and arranged concentrically with the input gear. A bearing lubrication mechanism consisting of a cavity formed in the gear piece and an oil aperture formed in the input gear.

Claims

1. A bearing lubrication mechanism of a gear transmission, comprising:

(a) a casing containing lubrication oil;

(b) an input power shaft rotatably mounted in said casing having an axial bore in one end thereof;

(c) an input gear having a root cylinder concentrically and integrally formed with said input power shaft at said one end thereof;

(d) an output power shaft one end thereof being coaxially disposed in the axial bore of said input power shaft;

(e) an output pilot bearing disposed in said axial bore and rotatably supporting the one end of said output power shaft;

(f) a gear piece having a root cylinder rigidly secured to and disposed concentrically and in axial abutting relationship with said input gear at the one end of said input power shaft, the root cylinder of said gear piece being radially larger than the root cylinder of the adjacent input gear and having at least one cavity opening toward said input gear and radially extending from the radial inward portion of the gear piece root cylinder to a position radially outward of the root cylinder of said input gear; and

(g) the root cylinder of said input gear having at least one radially inclined oil aperture providing oil communication between the space defined by said cavity and said axial bore proximate said pilot bearing, and said input power shaft having at least one air communication port connecting said axial bore with the space defined by said casing.