Transaxle lubrication system

• US 4,480,493 A
• Filed: 02/19/1982
• Issued: 11/06/1984
• Est. Priority Date: 02/20/1981
• Status: Expired due to Fees

• Current Assignee: Nissan Motor Co., Ltd.
• Original Assignee: Nissan Motor Co., Ltd.
• Inventors: Takahashi, Kotei
• Primary Examiner(s): Staab, Lawrence J.
• Assistant Examiner(s): Bednarek, Michael D.
• Application Number:
  US06/350,384
• Time in Patent Office: 991 Days
• Field of Search: 74/467, 184/11 R, 184/13 R, 184/6.12, 184/6.22
• US Class Current: 74/467
• CPC Class Codes: F16H 57/0426 Means for guiding lubricant into an axial channel of a shaft
• CPC Class Codes: F16H 57/045 Lubricant storage reservoirs, e.g. reservoirs in addition to a gear sump for collecting lubricant in the upper part of a gear case
• CPC Class Codes: F16H 57/0494 with variable gear ratio or for reversing rotary motion
• CPC Class Codes: Y10T 74/19991 Lubrication

Abstract

In a transaxle (1), a funnel-like oil pocket member (60) receives lube oil supplied from a gutter-like projection (43) formed to overlap a ring gear to collect oil sticking to a side thereof. The funnel-like member supplies lube oil to a lube oil passage (47) formed in a main shaft (18) through a hole (63) and a space (δ).

Claims

1. A transaxle comprising a housing charged with lube oil and having first and second housing sections;

a transmission placed within said first housing section and including a pair of generally parallel first and second shafts having mounted thereon a gear train for transmitting motion between the shafts, said first shaft having movably mounted thereon a plurality of movable elements including gears forming part of said gear train and further having a lube oil passage for supplying therethrough lube oil to sliding portions of said movable elements;

a final gearing and differential placed inside of said second housing section and coupled with said transmission to form a single unit, said final gearing having a ring gear plunged into the lube oil within said second housing, said second housing having at the inner wall thereof a boss portion on which said first shaft is journaled at an end thereof, said first shaft having adjacent said journal thereof a terminal end face which cooperates with said boss portion to define a chamber, said lube oil passage having an open end opening to said terminal end face of said first shaft, said boss portion having a through hole establishing communication between said chamber and the outside of said boss portion, a gutter-like projection provided on the inner wall of said second housing section to collect lube oil splashed and carried by said ring gear and constructed to descend slowly toward said boss portion so as to convey lube oil toward the boss portion, said gutter-like projection having a portion thereof extending at approximately the same elevational position as a portion of the ring gear to overlap one of the sides of said ring gear to collect thereat lube oil sticking to said one side of the ring gear, and a funnel-like oil pocket member mounted on the inner wall of said second housing section at a location between said gutter-like projection and said boss portion, said oil pocket member having a storing portion for storing lube oil supplied thereto from said gutter-like projection and an outlet tube communicated with said storing portion and inserted into said through hole to introduce the lube oil from said storing portion to said chamber.

2. A transaxle as set forth in claim 1, wherein said funnel-like oil pocket member and said first housing section are formed with projections respectively engaging each other to hold said oil pocket member in place.

3. A transaxle as set forth in claim 1, wherein said first shaft journal is carried by said boss portion by a rolling-element type bearing and wherein there is provided a bearing cover closing a side of said bearing facing said chamber to prevent lube oil in said chamber from being released through said bearing.

4. The transaxle of claim 1, wherein said oil pocket member is further located adjacent the circumferential periphery of the ring gear so as to catch and store lube oil thrown by said ring gear directly.