Power transmission apparatus

Patent metadata

Field	Value
Publication number	US-9851000-B2
Application number	US-201615248204-A
Country	US
Kind code	B2
Filing date	Aug 26, 2016
Priority date	Aug 28, 2015
Publication date	Dec 26, 2017
Grant date	Dec 26, 2017

Abstract

A power transmission apparatus of a vehicle is provided. The power transmission apparatus includes: an input shaft; a brake mechanism; an oil pump; a housing case; a center support; a lubricating oil reservoir; and an oil passage. The brake mechanism includes a stationary race and a rotary race that are adjacently arranged in an axial direction of the input shaft. The center support is disposed between an inner surface of the housing case and the input shaft in the housing case. The center support is configured to support the input shaft relative to the housing case. The lubricating oil reservoir is disposed in a lubrication passage of the lubricating oil inside the housing case. The oil passage communicates the lubricating oil reservoir with the rotary race of the brake mechanism such that the lubricating oil reserved in the lubricating oil reservoir is supplied into the brake mechanism.

First claim

What is claimed is:

1. A power transmission apparatus of a vehicle, the vehicle including an engine and a motor as a driving power source, the power transmission apparatus comprising:
an input shaft into which power from the engine is inputted;
a brake mechanism arranged around the input shaft, the brake mechanism including a stationary race and a rotary race that are adjacently arranged in an axial direction of the input shaft, the rotary race configured to rotate along with rotation of the motor;
an oil pump configured to supply lubricating oil to the brake mechanism, the oil pump configured to be driven by rotation of the input shaft;
a housing case housing the input shaft, the brake mechanism, and the oil pump inside the housing case;
a center support disposed between an inner surface of the housing case and the input shaft in the housing case, the center support configured to support the input shaft relative to the housing case;
a lubricating oil reservoir disposed in a lubrication passage of the lubricating oil inside the housing case; and
an oil passage communicating the lubricating oil reservoir with the rotary race of the brake mechanism such that the lubricating oil reserved in the lubricating oil reservoir is supplied into the brake mechanism.

2. The power transmission apparatus according to claim 1 , wherein
in the housing case, the rotary race, the stationary race, and the center support are adjacently arranged from one side toward the other side in the axial direction of the input shaft,
the lubricating oil reservoir is disposed in a portion on the center support opposite to the stationary race in the axial direction, and
the oil passage extends through the center support and the stationary race.

3. The power transmission apparatus according to claim 2 , wherein
the lubricating oil reservoir is a region partitioned by a surface of the center support opposite to the stationary race in the axial direction, and a shielding member covering the surface of the center support opposite to the stationary race in the axial direction.

4. The power transmission apparatus according to claim 1 , wherein
the rotary race and the stationary race are adjacently arranged in the axial direction of the input shaft in the housing case,
the lubricating oil reservoir is disposed in a portion on the stationary race opposite to the rotary race in the axial direction, and
the oil passage extends through the stationary race.

5. The power transmission apparatus according to claim 4 , wherein
in the housing case, the rotary race, the stationary race, and the center support are adjacently arranged from one side toward the other side in the axial direction of the input shaft,
the stationary race and the center support are adjacently disposed in one partial region of the stationary race and the center support in the axial direction of the input shaft,
the stationary race and the center support are disposed to face each other in other partial regions of the stationary race and the center support with a predetermined distance between the stationary race and the center support in the axial direction of the input shaft, and
the lubricating oil reservoir is a region partitioned by other partial regions of the stationary race and the center support that face each other.

6. The power transmission apparatus according to claim 4 , wherein
in the housing case, the center support, the rotary race, and the stationary race are adjacently arranged from the other side toward one side in the axial direction of the input shaft, and
the lubricating oil reservoir is a region partitioned by a surface of the stationary race opposite to the rotary race in the axial direction, and a shielding member disposed to face the surface of the stationary race opposite to the rotary race in the axial direction.

7. The power transmission apparatus according to claim 1 , wherein
the oil passage includes a first opening that opens toward the rotary race, and a second opening that opens toward the lubricating oil reservoir.

8. The power transmission apparatus according to claim 1 , further comprising:
a planetary gear mechanism disposed between the input shaft and the brake mechanism in the housing case, wherein
the brake mechanism is disposed on an outer periphery of a ring gear in the planetary gear mechanism.

9. The power transmission apparatus according to claim 1 , wherein
the stationary race and the center support are fastened together to the housing case with a fastening member.

Assignees

• Toyota Motor Co Ltd

Inventors

• Shioiri Hiroyuki
• KUROSAKI Yuki
• Shibata Hiroyuki
• Yasui Hiroki

Classifications

• B60K6/405

  Housings · CPC title

• F16H57/0434

  relating to lubrication supply, e.g. pumps; Pressure control · CPC title

• B60Y2306/03

  Lubrication · CPC title

• B60P3/2205 Primary

  Constructional features · CPC title

• F16H57/042

  Guidance of lubricant · CPC title