Lubrication system for transmission

Patent metadata

Field	Value
Publication number	US-9683651-B2
Application number	US-201514730237-A
Country	US
Kind code	B2
Filing date	Jun 4, 2015
Priority date	Jun 11, 2014
Publication date	Jun 20, 2017
Grant date	Jun 20, 2017

Abstract

A lubrication system for a transmission includes a first tubular portion, a second tubular portion, and a hollow cylindrical member. The first tubular portion has a cavity and includes a flange at one end adjacent to a gear shaft of the transmission. The first tubular portion has a first enlarged-diameter part extending in an axial direction from a joint at which the first tubular portion is joined to the second tubular portion. The second tubular portion has a second enlarged-diameter part that extends in the axial direction from the joint and has a diameter substantially equal to a diameter of the first enlarged-diameter part. The hollow cylindrical member is disposed in the first and second tubular portions and tightly fitted in the first and second enlarged-diameter parts of the first and second tubular portions joined to each other.

First claim

What is claimed is:

1. A lubrication system for a transmission including a gear shaft having therein a lubricating oil supply passage that extends axially and has at least one open end, a housing rotatably supporting the gear shaft, and a cover fastened to the housing by a fastener, the cover having therein a lubricating oil passage, the system comprising:
a first tubular portion facing an opening of the gear shaft, protruding from an outer surface of the housing, and having a cavity;
a second tubular portion joined to the first tubular portion, the second tubular portion protruding from an inner surface of the cover and having a cavity; and
a hollow cylindrical member disposed in the first and second tubular portions,
the first tubular portion having a first enlarged-diameter part axially extending from a joint at which the first tubular portion is joined to the second tubular portion,
the second tubular portion having a second enlarged-diameter part that axially extends from the joint and has a diameter identical to that of the first enlarged-diameter part,
the first tubular portion including a flange at one end adjacent to the gear shaft,
the hollow cylindrical member being fitted in the first and second enlarged-diameter parts of the first and second tubular portions joined to each other,
the flange and the opening of the gear shaft defining spacing therebetween.

2. The system according to claim 1 ,
wherein the flange has a first surface that extends substantially perpendicular to an axis of the lubricating oil supply passage,
wherein the flange has a side surface that is disposed adjacent to an outer circumferential surface of a gear closest to the flange, and
wherein the side surface of the flange is inclined with respect to the first surface.

3. The system according to claim 1 , wherein the end of the first tubular portion adjacent to the gear shaft has an orifice structure.

4. The system according to claim 1 , wherein the hollow cylindrical member is fitted in the first and second enlarged-diameter parts to form a seal for preventing leakage of lubricating oil from the joint at which the first tubular portion is joined to the second tubular portion.

5. A lubrication system for a transmission, comprising:
a first tubular portion having a cavity and including a flange at one end adjacent to a gear shaft of the transmission, the gear shaft having an opening and extending in an axial direction of the gear shaft, the first tubular portion facing the opening of the gear shaft and protruding in the axial direction from an outer surface of a housing of the transmission, the housing rotatably supporting the gear shaft, the flange and the opening defining a space between the flange and the opening;
a second tubular portion having a cavity, joined to the first tubular portion, and protruding in the axial direction from an inner surface of a cover of the transmission, the cover being fastened to the housing with a fastener, the first tubular portion having a first enlarged-diameter part extending in the axial direction from a joint at which the first tubular portion is joined to the second tubular portion, the second tubular portion having a second enlarged-diameter part that extends in the axial direction from the joint and has a diameter substantially equal to a diameter of the first enlarged-diameter part; and
a hollow cylindrical member disposed in the first and second tubular portions and fitted in the first and second enlarged-diameter parts of the first and second tubular portions joined to each other.

6. The system according to claim 5 ,
wherein the flange has a first surface that extends substantially perpendicular to an axis of the lubricating oil supply passage,
wherein the flange has a side surface that is disposed adjacent to an outer circumferential surface of a gear closest to the flange, and
wherein the side surface of the flange is inclined with respect to the first surface.

7. The system according to claim 5 ,
wherein the one end of the first tubular portion adjacent to the gear shaft has an orifice structure.

8. The system according to claim 5 ,
wherein the one end of the first tubular portion adjacent to the gear shaft has a hole which passes through the one end in the axial direction, and

wherein a diameter of the hole is smaller than a diameter of the first tubular portion.

9. The system according to claim 5 ,
wherein the first tubular portion and the second tubular portion are coaxially arranged.

10. The system according to claim 5 , wherein the hollow cylindrical member is fitted in the first and second enlarged-diameter parts to form a seal for preventing leakage of lubricating oil from the joint at which the first tubular portion is joined to the second tubular portion.

Assignees

• Honda Motor Co Ltd

Inventors

• Fukasawa Shin
• Kimura Mitsuo

Classifications

• F16H3/006

  power being selectively transmitted by parallel flow paths, e.g. dual clutch transmissions · CPC title

• F16H57/0494

  with variable gear ratio or for reversing rotary motion · CPC title

• F16H2200/0065

  the gear ratios comprising nine forward speeds · CPC title

• F16H3/093

  with two or more countershafts · CPC title

• F16H57/0471

  Bearing · CPC title